Pneumatic tire

FIELD: transport.

SUBSTANCE: proposed invention relates to automotive industry. Central groove (14) directed along circumference is arranged on equator (CL) of tread (12). Note here that first transverse grooves (20) are arranged on both sides of aforesaid central groove that are formed with smaller angle with respect to tire axial direction compared with first transverse groove (20).One end of every first transverse groove (20) and one end of every second transverse groove (22) are connected with shoulder zone groove (18) directed along circumference, while shoulder zone transverse grooves (23) are arranged on outer side of every shoulder zone groove (18) directed along circumference. Every shoulder zone transverse groove (23) runs from jointing part towards tread edge (12E) and is formed at smaller angle to tire axial direction than that of first transverse groove (20).

EFFECT: higher adhesion of tire.

7 cl, 6 dwg

 

The present invention relates to pneumatic tires and in particular to a pneumatic tire which has an improved characteristic.

Pneumatic tyres contain directed circumferential grooves and transverse grooves are sloped relative to the direction across the bus (see laid out a patent application in Japan (JP-A) No. 2005-297695).

In conventional pneumatic tire between a pair of directed along the circumference, located in the shoulder area of the grooves formed by the first transverse grooves are sloped relative to the axial direction of the tire, and the second transverse grooves at a smaller angle relative to the axial direction of the tire than the first transverse groove. On the outer sides of the grooves directed in the circumferential direction and located in the shoulder area, the third transverse groove formed along the lines of a continuation of the first transverse grooves.

Even when a conventional pneumatic tire is attained primary level of efficiency of the clutch. However, the market requires further improvements.

The present invention is directed to solving the problems described above, and the objective is the creation of a pneumatic tire with improved characteristic of the clutch, which is further improved relative to the prior art.

Pneumatic tire according to claim 1 of the formula the invention includes: a Central directed along the circumference of the groove made on the equator of the tread; directed along the circumference, located in the shoulder area of the grooves located on both sides in a direction transversely relative to the Central bus, directed along the circumference of the tread grooves and the edges of the sides in the direction across the bus; the first transverse grooves, which are formed in the tread and are from the equator towards directed along the circumference, located in the shoulder area of the grooves and inclined at an angle θ1° relative to the transverse direction of the tire; and second transverse grooves that are formed in the tread and extending from the equator to directed along the circumference, located in the shoulder area of the grooves and arranged at an angle of inclination relative to the axial direction of the tire θ2°, which is smaller than θ1°, with the first transverse groove and the second transverse grooves are connected with directed along the circumference, located in the shoulder area of the grooves, and transverse, located in the shoulder area of the grooves formed in the tread at an angle of inclination relative to the axial direction of the tire θ3°relative to which it is established, that it must be less than θ1°at the location of the cross formed in the shoulder area of the grooves from the plots on which p is pout transverse grooves are connected with the second transverse grooves, to the edges of the protector.

Next will be described the operation of the pneumatic tire according to claim 1 of the claims.

In the pneumatic tire, the tread according to the invention, a plurality of blocks, which are differentiated by many directed along the circumference of the grooves and plenty of transverse grooves which are inclined relative to the axial direction of the tire. Thus, edges of the transverse grooves affect the strength of coupling. In addition, to increase the adhesion forces, the edges of the transverse grooves parallel relative to the axial direction of the tire.

In the pneumatic tire according to claim 1 of the formula of the invention, the angle θ3° tilt of the transverse grooves of the shoulder area relative to the axial direction of the tire is set to be smaller than the first transverse grooves, whose angle relative to the axial direction of the tire θ1° is the greatest. Thus, edges of the transverse grooves of the shoulder area can be close to parallel with the axial direction of the tire, and the efficiency of coupling can be increased over that of the former.

Further, the first transverse grooves, which are tilted relative to the axial direction of the tire, extending from the equator of the tire towards directed along the circumference of the grooves of the shoulder area, and then joined with the transverse grooves of the shoulder area, which is rehadat in the direction of the edge protector. Thus, during driving on a wet road surface water in the area of the middle of the tread effectively is pushed in the direction of the edge protector, and can be guaranteed high performance moisture hydroperiodide.

In the tread of this pneumatic tire has a slightly smaller cross grooves on the side of the shoulder area than that of the equator. Thus, the rigidity of the protrusions on the side of the shoulder area is relatively higher than that of the equator, the deformation of the tabs on the side of the shoulder area while bending portions of the tread in the direction of the shoulder area, for example, while driving on the turn, softens, and achieved highly stable moving.

Pneumatic tire according to claim 2 is the pneumatic tire according to claim 1 claims, in which the angle of inclination θ3° the transverse grooves of the shoulder area has a value that is less than θ2degrees.

The following describes the operation of the pneumatic tire according to claim 2.

Since the angle of inclination of the transverse grooves of the shoulder area θ3° set to be smaller than θ2°the transverse grooves of the shoulder area can be close to parallel with the axial direction of the tire, and the efficiency of coupling with transverse grooves shoulder the ons can be further improved.

In the pneumatic tire according to a preferred variant implementation of the invention on the surface of the tread transverse slit drainage grooves extending in a direction across the tread, formed within a set of blocks that are formed by multiple grooves, passing in the circumferential direction of the tire and perpendicular to tires, from a variety of units, Central units, which are located from the equator, are smaller than the blocks of the shoulder area, which is made from the outer side in the transverse direction relative to the Central block, and at least part of the grooves which form the Central blocks is formed with a surface relief of the seabed, which is located on a depth smaller than the depth from the tread surface to the bottom surfaces of the grooves that form the blocks of the shoulder area.

It is preferable that at least part of the grooves which form the Central blocks is formed with a surface relief of the seabed, with the rigidity of the Central blocks and block stiffness of the shoulder area are equivalent. Thus, performance on dry roads, wet roads, icy/snowy road surface and the like, and is especially characteristic of stability move, Hara is the statistics of the set speed and the braking performance on icy/snowy road surface can be improved.

Moreover, since the transverse slit drainage grooves formed within blocks (Central blocks and the blocks of the shoulder area), improved force grip on icy/snowy road surface (to which reference is made as to the impact edge), and can improve the characterization of the stability of the movement, characteristics of the set speed and the braking performance on icy/snowy roads. Additionally, water, snow or the like on the ground level (between the tread surface and the ground surface) can be disposed along the transverse slit drainage grooves, and can be prevented hydroperiodide, a situation in which the tire is floating.

Moreover, as the Central blocks are located from the equator relative to the blocks of the shoulder area, providing a range of grooves which form the Central blocks, and shear (shear force) is not reduced due to snow bars in the blocks of the shoulder area. Therefore, can improve performance, such as the characterization of the stability of movement, speed, braking performance, efficiency clutch and such on dry roads, wet roads, icy/snowy road surfaces and the like.

According to another preferred variant of implementation of the present invention, in the pneumatic tire of adjacent multiple Central units, at least part of the grooves, which form one of the Central blocks generated by the higher surface relief of the bottom, which has a depth smaller than the depth of the surface relief of the bottom.

According to the invention, at least part of the grooves, which form one of the Central block of many neighboring the Central block, formed the highest surface relief of the bottom. Therefore, the decrease in rigidity of the Central units can optionally be softened, and performance, such as the characterization of the stability of the movement, characteristics of acceleration and deceleration, the efficiency of coupling and the like on dry pavement, wet pavement, icy/snowy road surface and the like can be further improved.

It is preferable that the pneumatic tire is directed along the circumference of the slit drainage grooves extending in the circumferential direction, are formed in the blocks of the shoulder area.

According to another preferred variant of execution directed along the circumference of the slit drainage grooves SFOR iravani in the blocks of the shoulder area, this increases the friction on the ground level while driving on the turn, and can be prevented lateral slippage during movement on the turn, in addition to this can be prevented hydroperiodide while driving on the turn on a wet road surface, icy/snowy road surface and the like.

Preferred is that of many neighboring the Central block, at least one block is a triangular block, which has a triangular configuration in the top view of the tread, and at least one of the grooves that form a triangular block, the inclined surface of its bottom and formed with inclined narrow groove which is narrower than the groove.

It is preferable that the pneumatic tire is formed holes of small diameter, which are made in a triangular block and pass inward from the tread surface in the radial direction of the tire.

Pneumatic tire according to the present invention constructed as described above, has a high efficiency clutch relative to previously available.

The present invention is illustrated by drawings, which presents the following:

figure 1 is a top view of the tread of the pneumatic tire according to a variant the execution of the present invention;

figure 2-6 - the second preferred embodiment of the present invention;

figure 2 - tread pneumatic tires;

figure 3 is a perspective view of the blocks that make up the tread surface of the pneumatic tire;

4 is a cross-section of the tread pneumatic tyres (view along a-a in figure 2);

5 is a cross-section of the tread pneumatic tyres (view b-b In figure 2);

6 is a view directed along the circumference of the cross section of the projector pneumatic tyres (view C-C in figure 2).

Figure 1 shows a pneumatic tire 10 according to a variant implementation of the present invention.

As shown in figure 1, in the tread 12 of the pneumatic tire 10 of the Central directed circumferential groove 14 formed on the tire equator CL. On both sides of the Central, directed along the circumference of the grooves 14 are formed in the second, directed along the circumference of the groove 16. Moreover, on the outer sides in the direction transversely of the tire relative to the second directed along the circumference of the grooves 16 are formed directed along the circumference of the groove 18 of the shoulder area.

Central, directed along the circumference of the groove 14 is continuous in the circumferential direction at a constant width and passes through a linear profile.

The second directed along the circumference of the groove 16 are not continuously towards the drop along the circumference, unlike Central, directed along the circumference of the groove 14, and are spaced in the circumferential direction.

Directed along the circumference of the groove 18 of the shoulder area are continuous in the circumferential direction at a constant width, which is narrower than the width of the Central, directed along the circumference of the groove 14, and pass through the line profiles.

In the tread 12 between the Central, directed along the circumference of the groove 14 and directed along the circumference of the grooves 18 of the shoulder area made the first transverse groove 20 and the second transverse groove 22, alternating in the circumferential direction. The first transverse groove 20 is located at an angle θ1° relative to the axial direction of the tire and directed upwards to the left. The second transverse groove 22 is inclined at an angle θ2°which is the angle smaller relative to the transverse direction of the tire than the angle of the first transverse grooves 20.

The first transverse groove 20 connect the equator CL with directional circumferential grooves 18 of the shoulder area, and their width from the equator CL is set to be narrower than the width of the side directed along the circumference of the groove 18 of the shoulder area.

Meanwhile, the second transverse groove 22 connect the equator CL with guided along the OCD is gnosti grooves 18 of the shoulder area and set width, which is narrower than the first transverse groove 20, and is constant. The first transverse groove 20 and the second transverse grooves 22 are connected by directed along the circumference of the grooves 18 of the shoulder area.

Further, in the tread 12 of the transverse grooves 23 of the shoulder area are from areas around which the first transverse groove 20 is connected with the second transverse groove 22, in the direction of the edges 12E of the protector.

The angle of inclination θ3° transverse grooves 23 relative to the axial direction of the tire shoulder area is set to be smaller than the angle of inclination θ1° the first transverse grooves 20.

Now, between the Central, directed along the circumference of the groove 14 and directed along the circumference of the grooves 18 of the shoulder area, triangular blocks 24, the Central rectangular blocks 26 and second rectangular blocks 28 are differentiated Central, directed along the circumference of the groove 14 facing circumferential grooves 18 of the shoulder area, the second directed circumferential grooves 16, the first transverse groove 20 and the second transverse grooves 22. The second, directed along the circumference of the groove 16 connect the end zones of the equator wider sections of the first transverse grooves 20 with the Central sections of the second transverse grooves 22.

Next, on the of current in the transverse direction of the tire sides directed along the circumference of the grooves 18 of the shoulder area are blocks 30 of the shoulder area, which are differentiated directed circumferential grooves 18 of the shoulder area and transverse grooves 23 of the shoulder area.

In the corner of each block 30 of the shoulder area from the side located along the circumference of the groove 18 of the shoulder area is formed bevel 30A line continuation of the wall of the groove of the first transverse groove 20. Accordingly, the water that flows through the first transverse groove 20, will smoothly flow into the transverse groove 23 of the shoulder area.

Each triangular unit 24 has a triangular configuration that is elongated and tapered in the transverse direction of the tire, with a part with a more acute angle (below are the links to the acute-angled portion oriented in the direction directed along the circumference of the groove shoulder area, and the edge of the base on the opposite side of the triangular block 24, oriented towards the equator CL, starting from the side with the apex with an acute angle.

Between the first transverse groove 20 and the second transverse grooves 22, the sides of the edges at the base of the triangular blocks 24 are Central rectangular blocks 26, and the second rectangular blocks 28 are located on the sides of an acute-angled triangular parts of the blocks 24. The blocks 30 of the shoulder area are located on the outer side in the transverse direction of the tire relative to the second direct the coal blocks 28. This four blocks forms a long, thin triangular configuration in transverse direction of the tire.

Because the first transverse groove 20 and the second transverse groove 22 is made of alternating in the circumferential direction of the tire, the triangular configuration formed by these four blocks are located along the circumference of the tire with their orientations, which differ from one another.

While in the tread 12 of the present exemplary versions can be formed slit drainage grooves or similar.

In the tread 12 of the pneumatic tire 10 block structure is made using a triangular blocks 24, the Central rectangular blocks 26, the second rectangular sides of the blocks 28 and 30 of the shoulder area, and achieved the basic design, which enables the mileage on ice/snow.

Because of the triangular blocks 24 are provided with parts with sharply angled top in the top view of the tread, while the mileage on snow penetrating effect on the snowy road increases and performance improves.

Edge of the first transverse grooves 20, the second transverse groove 22 and the transverse grooves 23 of the shoulder area formed in the tread 12, affect the strength of coupling. The angle of inclination θ3° transverse grooves 23 of the shoulder area relative axial e.g. the effect of tire set so it was less than the angle of inclination θ1° the first transverse grooves 20, and close to parallel with the axial direction of the tire. Thus, to achieve high efficiency clutch. Preference is given, if the angle of inclination θ3° transverse grooves 23 of the shoulder area relative to the axial direction of the tire is installed so that it was less than the angle of inclination θ2° the first transverse grooves 20, and more preferred is the creation of angle θ3° tilt parallel to the axial direction of the tire. More precisely, it is preferable angle of inclination θ3° not more than 30°.

Further, because the first transverse groove 20, which is inclined at a large angle relative to the direction of the axis of the tire, are in engagement with the sides of the equator with transverse grooves 23 of the shoulder area, which interact with the edges 12E of the tread, while driving on a wet road surface water in the middle of the tread effectively is pushed in the direction of the edges 12E of the tread, and can be guaranteed high performance moisture hydroperiodide.

In the tread 12 of the pneumatic tire 10 is made smaller than the transverse grooves on the side of the shoulder area than on the side of the equator CL, with the rigidity of the protrusions is relatively higher on the side of the shoulder area than on the side of the equator CL. Thus, the tilt of the fragments of the tread towards the shoulder area, for example, while driving on the turn, softens the deformation of the tabs on the side of the shoulder area, and achieved highly stable moving.

Next, the second preferred embodiment of the pneumatic tire relating to the present invention will be described with reference to the drawings. In the following descriptions of the drawings, elements that are identical or similar are assigned to the same or similar reference position. Here, the drawings are schematic, and it should be noted that the ratios between the respective sizes and similar differ from real structures.

Accordingly, special dimensions and the like should be determined after reading the following descriptions. Moreover, the included parts, in which the relationship and ratio of sizes differ from each other between drawings.

Figure 2 shows a fragment of the tread pneumatic tyres, figure 3 illustrates a perspective view of the blocks that make up the tread surface of the pneumatic tire, figure 4 shows the cross section of the tread pneumatic tyres (view along a-a in figure 2), figure 5 shows the cross section of the tread pneumatic tyres (view b-b In figure 2), and f is 6 illustrates a cross-section in the circumferential direction of the tread pneumatic tyres (view C-C in figure 2).

Pneumatic tire relating to the present variant execution is a conventional radial tire (tire without spacers)with Board, a carcass layer and a layer of the breaker (not shown). Moreover, the pneumatic tire relating to this variant execution is designed for the car.

As shown in figure 2 and figure 3, on the surface 101 of the tread pneumatic tyres, like the first option execution, formation of numerous directed along the circumference of the groove 103, which extend in the circumferential direction, and numerous transverse grooves 105, which extend in the transverse direction.

From the equator CL of the surface 101 of the tread is adjacent lots (three in the drawing) of the Central block 107, which are formed numerous directed circumferential grooves 103 and numerous transverse grooves 105. On the outer sides in the transverse direction of the tread relative to the Central blocks 107 are blocks 109 shoulder area, which formed numerous directed circumferential grooves 103 and numerous transverse grooves 105 and are larger than the Central blocks 107. That is, the center blocks 107 are smaller than blocks 109 shoulder area, which are located on the external is her side in the transverse direction of the tread relative to the Central block 107.

Each Central unit 107 formed transverse slit drainage grooves 111, which run in the transverse direction of the tread and have zigzag shapes that are repeated. In each block 109 of the shoulder area is made transverse slit drainage grooves 111, which run in the transverse direction of the tread with repeating zigzag forms, and directed along the circumference of the slit drainage grooves 113, which run in the circumferential direction, and a zigzag shape which is repeated.

As shown in Fig.4-6, at least some of the grooves that form the center blocks 107 (directed along the circumference of the groove 103 and transverse grooves 105)are formed with surfaces a relief of the seabed, which have a depth (D2) smaller than the depth (the depth of the outer side of the groove (D1)) from the surface 101 of the tread to the bottom surface of the grooves that form the block 109 of the shoulder area (directed along the circumference of the groove 103 and transverse grooves 105). At least part of the grooves that form one Central unit 107 of the many neighboring the Central block 107, formed the highest surface 117a of the raised bottom, which has a depth smaller than the depth (D2) to the surfaces 115 and the relief of the bottom.

More accurate is, first will be described the unit 107A on the inside. "Unit 107A inside" means the Central unit 107, which is located on the inner side in the transverse direction of the tire (the side closest to the equator CL) groove 115 with raised bottom, which runs in the circumferential direction, which is at least one of the many neighboring the Central block 107.

As shown in Fig.4-6, block 107A on the inner side is formed directed along the circumference of the groove 103, which has a bottom at a depth the same as the depth (D1) of the groove on the outer side, the grooves 115 with a raised bottom that have a surface a relief bottom depth (D2) is less deep than the depth (D1) of the groove on the outer side, the groove 117 with high relief bottom, which has a higher surface relief of the seabed depth (D3) is less deep than the depth of the surface a (D2) bottom relief and the inclined narrow groove 119 (D1>D2>D3).

Inclined narrow groove 119 denotes a narrow groove, the plane of the bottom of which is inclined upward toward the area with obtuse apex, and which is more narrow (for example, 1.5 mm or less)than the grooves (directed along the circumference of the groove 103 and transverse grooves 105). Inclined narrow groove 119 may be composed slit Dre the most important grooves or similar.

Groove 115 with a raised bottom that have a surface a relief bottom, are arranged on the outside in the transverse direction of the tread, the side of the unit 107A on the inner side and on its lateral side, opposite to the direction R of rotation of the tire. Groove 117 with high relief bottom, which has the highest surface 117a of the raised bottom, is located on the side opposite to the direction R of rotation of the tire. Inclined narrow groove 119 is on the side of the direction R of rotation of the tire.

Next will be described the block W on the outside. "Block B on the outer side" refers to the Central unit 107, which is located on the outer side in the transverse direction of the tread (the far side in the transverse direction of the tread) relative to the groove 115 with raised bottom which extends in the circumferential direction, which is at least one of the many neighboring the Central block 107.

As shown in Fig.4-6, block B on the outer side is formed directed along the circumference of the groove 103 and the transverse groove 105, which have the bottom at depths such as the depth (D1) of the groove on the outer side, the groove 115 with raised bottom, which has a surface a relief bottom depth (D2) smaller than the depth (D1) of the groove on the outer side, and an inclined uz the second groove 119 (D1> D2).

The groove 115 with raised bottom, which has a surface a relief bottom, is located on the outer side in the transverse direction of the tread relative to the unit 107A on the inside. Inclined narrow groove 119 runs from side in the direction R of rotation of the tire.

The following describes a triangular block S. "Triangular block S" means the Central unit 107, which is formed in a triangular configuration top view of the protector and is the longest side in the direction R of rotation of the tire, which is at least one of the many neighboring the Central block 107.

As shown in Fig.4-6, a triangular block IS formed directed along the circumference of the groove 103 and the transverse groove 105, which have the bottom at depths such as the depth (D1) of the groove on the outer side, the groove 115 with raised bottom, which has a surface a relief bottom depth (D2) is less deep than the depth (D1) of the groove on the outer side, and an inclined narrow groove 119 (D1>D2). To have at least one of the grooves, which forms a triangular block C, is formed of the inclined narrow groove 119.

The groove 115 with raised bottom, which has a surface a relief bottom, is located on the side of the direction R of rotation of the tire. Inclined narrow groove 119 is located with one hundred the ons, the opposite side of the direction R of rotation of the tire.

In the triangular block IS formed holes 121 of small diameter, directed inwards from the surface 101 of the tread in the radial direction of the tire. This triangular block IS not required to have a triangular shape in the top view of the tread and, of course, can have, for example, rectangular in shape in the top view of a protector.

Thus, at least part of the grooves which form the Central blocks 107 (block 107A on the internal side, the block B on the outer side and a triangular block C), is formed by the surface a relief of the bottom, which has a depth (D2) is less deep than the depth (D1) of the groove on the outer side. Moreover, at least part of the grooves, forming one Central unit 107 of the many neighboring blocks 107 (i.e. the unit 107A on the inside), is formed by the high surface 117a of the raised bottom, which has a depth (D3) is less deep than the depth of the surface a (D2) embossed bottom.

According to the present invention, at least part of the grooves which form the Central blocks 107 (directed along the circumference of the groove 103 and transverse grooves 105), formed by the surface a relief bottom. As a result, the rigidity of the Central blocks 107 and the rigidity of the blocks 109 in the shoulder area EQ is the valence, and may be superior performance on dry roads, wet roads, icy/snowy road surfaces and similar, and is especially characteristic of the stability of the movement, characteristics of the set speed and the braking performance on icy/snowy roads.

Furthermore, since the transverse slit drainage grooves 111 are formed in these blocks (Central blocks blocks 107 and 109 of the shoulder area), improved force grip on icy/snowy roads (to which reference is made as to the impact edge), and can improve the characterization of the stability of the movement, characteristics of the set speed and the braking performance on icy/snowy roads. Additionally, water, snow or the like on the ground level (between the tread surface and the ground surface) can be disposed along the transverse slit drainage grooves, and can be prevented hydroperiodide, a situation in which the tire is floating.

Since the Central blocks 107 are arranged on the side of the equator CL, relative to the blocks 109 shoulder area, the guaranteed amount of the grooves that form the blocks 109 in the shoulder area, and shear (shear force) is not reduced due to snow columns in the lokas of the shoulder area. Therefore, can be improved performance, such as the characterization of the stability of movement, speed, braking performance, the efficiency of coupling and the like, on dry roads, wet roads, icy/snowy road surfaces and the like.

At least part of the grooves that form one Central unit 107 from many neighboring the Central block 107 (i.e. the unit 107A on the inside), is formed by using a higher surface 117a of relief bottom. Therefore, the lowering of the rigidity of the Central block 107 can also be restrained, and can be, moreover, improved performance, such as the characterization of the stability of the movement, characteristics of acceleration and deceleration, the efficiency of coupling and the like on dry roads, wet roads, icy/snowy road surfaces and the like.

In addition, as directed in the circumferential direction of the slit drainage grooves 113 are formed in blocks 109 shoulder area, the friction at the ground level during the movement of the rotation can be increased, and the transverse slippage during movement on the rotation can be prevented, in addition, can be prevented hydroplaning the tion while driving on the turn on a wet road surface, icy/snowy road surfaces and the like.

Triangular blocks S are triangular in top view of the protector, so penetrating impact triangular blocks S on icy/snowy road surface is increased, and performance (e.g., characterization, stability, movement, speed and friction, the efficiency of coupling and the like) on icy/snowy road surface can be improved beyond that.

Since the holes of small diameter 121 are formed in a triangular blocks S, reducing the rigidity of the triangular blocks S can be mitigated in comparison with slit drainage grooves (transverse slit drainage grooves 111, directed along the circumference of the slit drainage grooves 113)with water, snow or the like on the ground level can be released into the holes of small diameter 121. Consequently, it can be moreover improved performance, such as the characterization of the stability of the movement, characteristics of acceleration and deceleration, the efficiency of coupling and the like, on dry roads, wet roads, icy/snowy road surfaces.

Because of the triangular block IS made triangular in top view of the tread, can be taken into attention is the lowering of the rigidity of the plot, with obtuse apex. However, the bottom surface of the inclined narrow groove 119 is inclined upward from the equator CL toward the outer side of the tread in the transverse direction, additionally made the holes 121 of small diameter, which are eminently more excellent in terms of stiffness than slit drainage grooves. Thus, the rigidity of the triangular block S can be guaranteed.

Thus, it can be weakened strain of the Central block 107, which are smaller than the blocks 109 shoulder area, and are located on the side of the equator CL, on which the load tends to be concentrated in the more heavily. Therefore, the rigidity on the side of the equator CL within the Central block 107 can be improved, and performance, such as the characterization of the stability of the movement, characteristics of acceleration and deceleration, the efficiency of coupling and the like on dry roads, wet roads, icy/snowy road surfaces, can be further improved.

Although the present invention disclosed the use of approximate variants of the present invention described above, the descriptions and drawings constituting part of this statement are not limiting the present invention.

nevraticheskaya bus, related to these options of carrying out the invention is described as representing a conventional radial tire provided by the Board, a carcass layer and a layer of the breaker (not shown). However, this is not a limitation, and a pneumatic tire can be non-radial tires (for example, a tire with a diagonal cord).

Pneumatic tire according to a preferred variant implementation of the invention is described as designed to mount on the car. However, this is not a limitation, and a pneumatic tire may be designed to mount on a vehicle other than the vehicle (for example, bus or truck).

It is preferable that the three Central unit 107 are located near: block 107A on the internal side, the block B on the outer side and a triangular block S. However, this is not a limitation; for example, the pneumatic tire may be formed with one of the Central blocks 107, can have any two of the Central block 107 in the neighborhood, and may have three or more Central units 107 in the neighborhood.

From this presentation, numerous interchangeable design options, examples, and practical technical solutions will be clear to professionals experienced in the technology of production.

Accordingly, technical diapazonaaktera of the invention is defined only the essential features, characterizing this invention, from the claims, based on the previously mentioned variants of execution.

Example 1

The following describes the results of the following tests, carried out using pneumatic tire relating to a comparative example and example. The present invention is not limited to these examples.

Data relating to pneumatic tyres, was measured under the following conditions.

• Tyre size: 195/65R15.

• Wheel size: 15×6JJ.

• Status of internal pressure: 200 kPa.

• The condition of the vehicle: the vehicle FR (working volume of 2500 CC).

• Condition of loading: One driver + 60 kg (corresponding to the two passengers).

First will be described the construction of a pneumatic tire relating to a comparative example and example. These pneumatic tires have the same parameters, except for the depth from the tread surface to the bottom surfaces of the grooves, which are described below.

In the pneumatic tire pertaining to the comparative example, the depth from the tread surface to the bottom surfaces of the grooves which form the Central blocks and the blocks of the shoulder area (directed circumferential grooves and transverse grooves), all are the same. This pneumatic tire relating to the comparative is the example has the following parameters.

• The negative ratio of the tread: 28%.

• Width directed along the circumference of the grooves: 9.5 mm (at the equator), 5.0 mm (in shoulder areas).

• Depth directed along the circumference of the grooves: 8.9 mm

• Width of the transverse grooves: 7.0 mm

• The depth of the transverse grooves: 8.9 mm

• Width directed along the circumference of the slit drainage grooves: 1.0 mm

• Width transverse slit drainage grooves: 0.4 mm.

• The width of the inclined narrow groove: 1.5 mm

• Diameter of holes of small diameter: the diameter of 1.5 mm

This pneumatic tire relating to the present example is a pneumatic tire relating to the previously described second preferred variant implementation of the invention (see figure 2-6). This pneumatic tire relating to the present example has the following parameters.

• The negative ratio of the tread: 28%.

• Width directed along the circumference of the grooves: 9.5 mm (at the equator), 5.0 mm (in shoulder areas).

• Depth directed along the circumference of the grooves: 8.9 mm

• Width of the transverse grooves: 7.0 mm

• The depth of the transverse grooves: 8.9 mm

• The depth of the surface relief-bottom: 7.0 mm

• The depth to the highest surfaces of the raised bottom: 3.5 mm

• Width directed along the circumference of the slit Dre the most important of grooves: 1.0 mm

• Width transverse slit drainage grooves: 0.4 mm.

• The width of the inclined narrow groove: 1.5 mm

• Diameter of holes of small diameter: the diameter of 1.5 mm

For this pneumatic tire relating to a comparative example and example, the stability of travel on a dry road surface, the stability of movement and hydroperiodide on wet road surface and the characteristics of the set speed, the braking performance and stability move on icy/snowy road surface is described with reference to table 1.

Table 1
Comparative exampleExample
Dry pavementStability move100105
Wet pavementStability move100105
Hydroperiodide100105
Icy/snowy the second road surface Feature set speed100102
The braking performance100104
Stability move100105

<Stability move on a dry road surface>

Each pneumatic tire was installed on the vehicle and passed the checker on a dry road surface at a constant speed. Stability move the pneumatic tire pertaining to example, was estimated by the perception of the professional driver, when the stability of the movement of the pneumatic tire relating to this comparative example having a value of "100". Here, the larger the index, the better the stability of the movement.

This result shows that the pneumatic tire pertaining to this example, is preferable for stability move on dry pavement than the pneumatic tire relating to a comparative example.

<Stability move on the wet road surface>

Each pneumatic tire was installed on the vehicle and passed programproperty on a wet road surface at a constant speed. Stability move the pneumatic tire pertaining to example, was estimated by the perception of the professional driver, when the stability of the movement of the pneumatic tire relating to this comparative example having a value of "100". Here, the larger the index is, the more preferable it is the stability of the movement.

This result shows that the pneumatic tire pertaining to this example, is preferable for stability move on a wet road surface than a pneumatic tire relating to a comparative example.

<Hydroperiodide on a wet road surface>

Each pneumatic tire was mounted on the vehicle. Pneumatic tire pertaining to the comparative example, took a turn for the checker on a wet road surface (J-shaped turn with a radius of 100 m) in increments of speed 5 km/h. The highest speed at which the line monitoring during turning impossible, was taken as "100". The highest speed at which the line monitoring is not possible during the rotation of the pneumatic tire relating to this example, is specified as the index. Here, the larger the index, the better avoid hydroperiodide.

This result shows that the pneumatic the e bus, related to this example, will be able to avoid hydroperiodide during turning on a wet road surface better than the pneumatic tire relating to a comparative example.

<Description set the speed on icy/snowy roads>

Each pneumatic tire was installed on the vehicle. The program checks icy/snowy road surface, the speed from the speed of 0 km/h to a speed of 20 km/h pneumatic tire relating to a comparative example, was taken as "100". Time set the speed of a pneumatic tire relating to example, is specified as the index. Here, the larger the index, the preferable characteristics of the set speed.

These results show that the pneumatic tire pertaining to example, is preferable for the characteristic set of speed than the pneumatic tire relating to a comparative example.

<a braking performance on icy/snowy roads>

Each pneumatic tire was installed on the vehicle. Pneumatic tire relating to a comparative example, was held at the speed of 20 km/hour program verification on icy/snow-covered floor. The braking distance of the vehicle's brake, which was used to 0 km/h was adopted for "100". Brake pneumatic tire pertaining to example, is specified as the index. Here, the larger the index is, the more preferable the braking performance.

This result shows that the pneumatic tire pertaining to example, is preferable for the braking performance than the pneumatic tire relating to a comparative example.

<a Stability move on icy/snowy road surface>

Each pneumatic tire was mounted on the vehicle and passed the checker on icy/snowy road surface at a constant speed. Stability move the pneumatic tire pertaining to example, was estimated by the perception of the professional driver, when the stability of the movement of the pneumatic tire relating to this comparative example having a value of "100". Here, the larger the index is, the more preferable it is the stability of the movement.

This result shows that the pneumatic tyre according to this example, is also more stable move on icy/snowy roads than the pneumatic tire relating to a comparative example.

1. Pneumatic tyre, the content is based on the Central directed along the circumference of the groove, performed at the equator of the tread, and directed along the circumference of the groove shoulder area, located on both sides in the transverse direction relative to the Central bus directed along the circumference of the grooves of the tread and around the edge from the center in the transverse direction of the tire; the first transverse grooves, which are made in the tread and are from the equator in the direction directed along the circumference of the grooves of the shoulder area, and are located at an angle θ1° relative to the axial direction of the tire; and second transverse grooves, which are made in the tread, are from the equator in the direction directed along the circumference of the grooves of the shoulder area and have an angle of inclination relative to the axial direction of the tire θ2°which is less than θ1°in which the first transverse groove and the second transverse grooves are connected in a directed circumferential grooves of the shoulder area, with the transverse grooves of the shoulder area formed in the tread angle of inclination relative to the axial direction of the tire θ3°which is less than θ1°with the transverse grooves of the shoulder area are from the parts on which the first transverse grooves are connected with the second transverse grooves towards the edges of the protector.

2. Pneumatic tire according to claim 1, in which the angle of inclination θ 3° the transverse grooves of the shoulder area is smaller than θ2degrees.

3. Pneumatic tire according to claim 1 or 2, in which the tread surface of the transverse slit drainage grooves, passing in the transverse direction of the tread are formed into many blocks through multiple grooves, passing in the circumferential direction and the transverse direction of the tire, and the set of blocks of the Central blocks, which are located from the equator, are smaller than the blocks of the shoulder area, which are formed on the outer side in the transverse direction relative to the Central block, and at least part of the grooves which form the Central blocks is formed with a surface relief of the seabed, which is located at a depth of less than the depth from the surface of the tire to the bottom surfaces of the grooves that form the blocks of the shoulder area.

4. Pneumatic tire according to claim 3, in which many neighboring the Central block, at least part of the grooves, which form one of the Central blocks is formed with the highest surface relief of the seabed, which is located at a depth smaller than the depth of the surface relief of the bottom.

5. Pneumatic tire according to claim 3, in which directed along the circumference of the slit drainage grooves, passing in the direction of the district along the tees, formed in the blocks of the shoulder area.

6. Pneumatic tire according to claim 3, in which many neighboring the Central block, at least one block has a triangular configuration in the top view of the tread and at least one of the grooves that form a triangular block, the inclined surface of the bottom from it and formed with inclined narrow groove which is narrower than the groove.

7. Pneumatic tire according to claim 6, in which are formed holes of small diameter, is made in a triangular block and passing inward from the tread surface in the radial direction of the tire.



 

Same patents:

Pneumatic machine // 2378130

FIELD: motor industry.

SUBSTANCE: tyre has tread surface equipped with multiple circular grooves (2, 4), which pass continuously in circumferential direction. Circular grooves (2, 4) each are equipped with multiple transverse grooves (7, 8), every of which has one end, which communicates to circular groove, and other end that ends in section (7, 8) of contact with earth surface, independently on other circular grooves, at the same time other transverse grooves are communicated to other circular grooves or with tread surface, which contacts with earth. Circular grooves (2, 4) and transverse grooves (7, 8) have, each, width, which is previously selected so that opposite walls of grooves do not contact with each other with such condition of tyre, when it is mounted on suitable standard rim, filled with air at maximum pressure and is loaded with weight, which corresponds to maximum bearing capacity of tyre. Width of specified transverse grooves, at least locally makes at least 30% of width of specified circular grooves. Each of specified transverse grooves has length, which makes at least 40% of length of specified circular grooves extension on specified surface of contact with earth.

EFFECT: reduced level of tyre noise.

6 cl, 10 dwg

Tread of tire // 2288846

FIELD: tire industry; heavy-weight truck tires.

SUBSTANCE: proposed tire tread with relief pattern is formed by two circumferential grooves. Said grooves are limited by two ribs of mean width containing great number of cuts whose contours on contact surface, when non-worn-out, are arranged between two points of intersection A and B, AB segment forming angle α not exceeding 40° in cross direction of tread. Each cut 7 of mean width E contains sequence of sections of cut. Some of said sections of cut over entire surface parallel to contact surface in non-worn-out state and enclosed between surface in non-worn-out state and 2/3 of maximum depth of cut have contours forming mean angle β not exceeding 15° in longitudinal direction of tread.

EFFECT: increased tire life.

8 cl, 7 dwg

Tire tread // 2246408

FIELD: automotive industry; tires for trucks.

SUBSTANCE: tire tread contains grooves arranged over circumference whose side walls are provided with upper and lower wavy areas located in staggered order relative to each other or are out of phase. Side walls has alternating projections and cavities relative to perpendicular middle line passing through upper edges of grooves. Space is made under edges of grooves over entire circumference of tread, rending flexibility to tread and preventing "rail wear".

EFFECT: reduced wear of tires.

24 cl, 14 dwg

FIELD: tire industry.

SUBSTANCE: proposed tire is provided with tread having two deep circular grooves separating central zone from two side shoulder zones furnished with shoulder blocks. Sum of width values of shoulder zones in tread is either equal to or less than 60% of its summary width. Width of each shoulder zone is not less than 20% of summary width. Each circular groove at side separated from central zone adjoins continuous path from which cross grooves branch to limit shoulder blocks.

EFFECT: increased wear resistance of tire.

10 cl, 9 dwg

The invention relates to the automotive industry

Air tire // 2381109

FIELD: automotive industry.

SUBSTANCE: proposed air tire comprises blocks arranged on its tread and separated by multiple peripheral lengthwise grooves 3 and multiple crosswise grooves 5. Said blocks have slot-like drain grooves arranged along tire circumference. Inner peripheral slot-like drain grooves run straight along tire radial direction, while outer peripheral slot-like drain grooves represent radial zigzag patterns.

EFFECT: improved controllability irrespective of road carpet.

9 cl, 7 dwg

FIELD: transportation.

SUBSTANCE: invention is related to motor industry. Pneumatic tyre comprises multiple blocks on its tread, which are defined with grooves installed along periphery of tyre, substantially, in its circumferential direction, and multiple cross grooves that cross grooves arranged in circumferential direction. All grooves are formed on surface of tyre tread. At that slot-like grooves are arranged on tyre tread, every of which has at least one pair of inclines surfaces, installed in direction of depth of this groove inside block, separating every such block on its front side, and pair bulges installed on opposite walls of such slot-like groove. Every pair of specified bulges has total height equal to width of slot-like groove, and specified bulges are formed on at least one specified pair of inclined surfaces of slot-like groove, besides bulges are arranged one opposite the other. Method for tyre manufacture is realised with the help of vulcanisation die mould, in which multiple special knives are installed, being designed to form according slot-like grooves in tyre tread.

EFFECT: tyre adhesion properties improve.

6 cl, 27 dwg

FIELD: automobile production.

SUBSTANCE: invention pertains to vehicle tyre protectors. Tyre tread for pneumatic tyre contains raised pattern that consists of many raised elements in a form of blocks and/or salient angles, limited by grooves. Many of raised elements are equipped with at least one notch oriented along some average direction. The direction is defined as angle between right line passing through the ends of this notch at running surface and transverse direction of tyre tread. Each notch is limited by walls made of rubber mixture and contains at least two areas, average orientation of which, measured in relation to transverse direction, differs from average orientation of this notch. At any rate, some of the said areas with orientation that differs from average direction of this notch have at least one projection that locally decreases the width of this notch by 50% of its maximum width.

EFFECT: improvement of tyre tread traction.

9 cl, 6 dwg

FIELD: transport.

SUBSTANCE: tyre for vehicle wheel contains tread band having tread pattern formed by at least two annular parts located in axial direction placed near each other. At least annular part have first geometric module repeated many times along direction of annular tyre length. First geometric module contains at least two shoulder blocks levelled-off in annular direction along side edge of tread band and separated by grooves positioned across annular outstretch direction of tyre and elongated ridge limited by two grooves inclined against annular outstretch direction. Elongated ridge is separated into many interim blocks with regard to axial outstretch of tread band separated by number of slots made essentially across elongated ridge.

EFFECT: tyre performance characteristics are improved.

58 cl, 7 dwg, 2 tbl

Pneumatic tire // 2333842

FIELD: transport.

SUBSTANCE: invention relates to automotive tires. The tread body is furnished with a dropper running axially in a zigzag manner and deep into the tire, the said dropper having an invariable depth. It features the rigidity index F defined as shown below, varying in the dropper lengthwise direction. The rigidity index makes F=(1+φ1)x(1+φ2)x(1+φ3), where φ1 is the dropper amplitude (mm) on the tire body step; φ2 is the dropper amplitude (mm) across the body section perpendicular to the dropper line on the step surface; φ3 is the dropper ridge line amplitude, the ridge running deep down, if the dropper wall surface seen from above. More particularly, the dropper amplitude φ1 on the tire outside exceeds, in axial direction, the dropper amplitude φ1' on the tire equatorial plane, and the dropper amplitude φ2 on the tire outside exceeds, in axial direction, the dropper amplitude φ2' on the tire equatorial plane. Thus, an irregular tire tread wear property is combined with adequate operating properties on moistened and snow-covered road surfaces.

EFFECT: reliable steering on moistened and snow-covered road surfaces.

9 cl, 22 dwg, 2 tbl

FIELD: road transport; heavy radial-ply tires.

SUBSTANCE: proposed tire has tread with number of circular grooves and number of cross grooves forming solid section circular rows in tread. Each solid section is provided with slots in front part of running surface.

EFFECT: increased wear resistance of tire.

4 cl, 3 dwg

Tread of tire // 2288846

FIELD: tire industry; heavy-weight truck tires.

SUBSTANCE: proposed tire tread with relief pattern is formed by two circumferential grooves. Said grooves are limited by two ribs of mean width containing great number of cuts whose contours on contact surface, when non-worn-out, are arranged between two points of intersection A and B, AB segment forming angle α not exceeding 40° in cross direction of tread. Each cut 7 of mean width E contains sequence of sections of cut. Some of said sections of cut over entire surface parallel to contact surface in non-worn-out state and enclosed between surface in non-worn-out state and 2/3 of maximum depth of cut have contours forming mean angle β not exceeding 15° in longitudinal direction of tread.

EFFECT: increased tire life.

8 cl, 7 dwg

FIELD: tire industry.

SUBSTANCE: proposed tire tread has three ring grooves and great number of cross grooves limiting four rows of blocks arranged along circumference, namely, two axial external shoulder rows and two central rows along sides of equatorial plane. Cross grooves meet in equatorial plane in preset direction of tire rolling. Each cross groove of tread central rows has widening of cross section of mainly circular profile formed at equal distance from ends and designed for gripping of snow. To provide low noise level when running along dry road, front cross edge profiles of adjacent blocks of central rows contains at least two series curvilinear sections.

EFFECT: improved gripping on snow-covered road, provision of noiseless running along dry roads and increased wear resistance of tread blocks.

33 cl, 7 dwg

FIELD: automotive industry; tire industry; road vehicles.

SUBSTANCE: proposed pneumatic tire tread cap is provided with great number of cuts, mainly, cross-orientated. According to invention, some of cross cuts at no wear form on tread running surface zones in form of cavities with mean width exceeding or equal to 2 mm, and maximum depth Pt not exceeding 80% of thickness of tread cap subject to wear. Other cross cuts form on the same tread running surface notches of width less than 2 mm and depth not exceeding Pt. great number of notches continue in zones in form of cavities so that after uniform wear of tread cap, volume of zones in form of cavities, opening on new tread running surface is of value within 50% and 150% of volume formed by zones at no wear. Forming member contains thick and thin parts.

EFFECT: improved wheel tread-to-road adhesion during entire service life of pneumatic tire.

6 cl, 8 dwg

FIELD: road vehicles.

SUBSTANCE: pneumatic tire tread cap has grooves limiting raised repetitive patterns, at least one of which is provided with first cuts and second cuts, each cut being limited by two main side surfaces interconnected by end surface. Bottom surfaces of first cuts and top surfaces of second cuts are functionally intercoupled so that, at any degree of wear of pneumatic tire tread, length of edges on rolling surface is at least 75% of length of said edges in new tire tread cap.

EFFECT: improved adhesion of tread and road at any wear, reduced noise in running.

11 cl, 12 dwg, 1 tbl

FIELD: transport.

SUBSTANCE: tyre for vehicle wheel contains tread band having tread pattern formed by at least two annular parts located in axial direction placed near each other. At least annular part have first geometric module repeated many times along direction of annular tyre length. First geometric module contains at least two shoulder blocks levelled-off in annular direction along side edge of tread band and separated by grooves positioned across annular outstretch direction of tyre and elongated ridge limited by two grooves inclined against annular outstretch direction. Elongated ridge is separated into many interim blocks with regard to axial outstretch of tread band separated by number of slots made essentially across elongated ridge.

EFFECT: tyre performance characteristics are improved.

58 cl, 7 dwg, 2 tbl

Air tyre // 2336181

FIELD: transportation.

SUBSTANCE: it is opened tyre-tread surface with one prescribed direction of rotation, including the first main straight groove, passing on tire circumference in area located from 4% till 15% of tire contact junction with ground width from tire equatorial plane to the left and the right sides. Tractive grooves pass slantwise from first main straight grooves to external sides of tire in the line opposite to tire sense of rotation in a way that they intercommunicate with edges of tire contact junction with ground, at that tractive grooves are located with specified distances on tire circumference. Tractive grooves and first main straight grooves form units. Between first main straight grooves with specified distances on tire circumference are located V-shaped transversal grooves, at that transversal grooves have tops, turned in the line opposite to tire sense of rotation. Transversal grooves first main straight grooves form units. Each transversal groove is of groove width measured by tire circumference, located in the range from 0.1L till 0.25L relative to length of L unit by tire circumference, adjoining to transversal groove. Ratio ACA/GCA of area ACA contact junction of units with ground and area GCA contact junction of total tyre-tread surface is from 55% till 75%.

EFFECT: improving of braking on wet surface and tire grip on snow and ice.

9 cl, 1 dwg, 3 tbl, 3 ex

FIELD: transportation.

SUBSTANCE: invention relates to pneumatic tyres, mainly for the pneumatic tyre wheeled vehicles operating in conditions of impassability, on deformable, viscous and/or loose soil, designed to ensure normal traction of agricultural tractor drive wheel tracks with road. The pneumatic tyre track protector contains tangentially curved grousers, the distance between the said grousers equals the width of the grouser proper.

EFFECT: goof vehicle stability on an inclined surface, higher efficiency and safety.

2 dwg

FIELD: road transport; heavy radial-ply tires.

SUBSTANCE: proposed tire has tread with number of circular grooves and number of cross grooves forming solid section circular rows in tread. Each solid section is provided with slots in front part of running surface.

EFFECT: increased wear resistance of tire.

4 cl, 3 dwg

FIELD: tire industry.

SUBSTANCE: invention relates to design of pneumatic tires intended for trucks operating both on roads with improved pavement and unimproved roads. Tread cap is made in form of blocks separated by zigzag grooves of equal width. Base of tread patent is made to form assemblies of blocks connected by half-bridges whose width is equal to or less than width of adjacent sides of blocks, and height of half-bridges is higher or lower than base of tread pattern in zigzag groove between blocks. Blocks are arranged in herringbone order with displacement through one step in circumferential direction. Width of blocks of neighbor rows arranged between lugs and separated by grooves is 71-85% of width of tread cap. Thread pattern has non-directional arrangement of lugs.

EFFECT: provision of tire featuring higher rigidity, resistance to mechanical damage, increased serviceability and service life at improvement of technology of pattern making.

3 cl, 1 dwg

FIELD: tire industry.

SUBSTANCE: proposed tire tread has three ring grooves and great number of cross grooves limiting four rows of blocks arranged along circumference, namely, two axial external shoulder rows and two central rows along sides of equatorial plane. Cross grooves meet in equatorial plane in preset direction of tire rolling. Each cross groove of tread central rows has widening of cross section of mainly circular profile formed at equal distance from ends and designed for gripping of snow. To provide low noise level when running along dry road, front cross edge profiles of adjacent blocks of central rows contains at least two series curvilinear sections.

EFFECT: improved gripping on snow-covered road, provision of noiseless running along dry roads and increased wear resistance of tread blocks.

33 cl, 7 dwg

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