Friction bearing and rack-and-pinion steer in car

FIELD: machine building.

SUBSTANCE: friction bearing (7) consists of bushing (17) out of synthetic plastic with at least one circular groove (16) made on external periphery surface (15) of bushing, of circular-shaped elastic element (18) inserted in circular groove (16) and of couple of periphery, axially symmetrical and turned inside surfaces (21, 22). Bushing (17) also has two pairs of slots (23, 24) and (25, 26) each positioned so, that surfaces (21, 22) run between them along circumference; the slots facilitate corresponding surfaces (21, 22) travelling in radial direction inside/outside. Further, the bushing has at least one pair of internal periphery surfaces (27, 28) turned outside and passing from outside into radial direction relative to pair of surfaces (21, 22). Each surface (27, 28) forms a gap with corresponding external periphery surface from the side of teeth and from opposite to it side of a shaft of steer rack; the shaft is inserted and fixed in a through orifice formed with pairs of surfaces (21, 22) and (27, 28). The section of each surface (21, 22) comes into a sliding contact with a corresponding external periphery surface of the shaft of the steer rack, except for external periphery surfaces from the side of teeth and for opposite to it side of the shaft of the steer rack. There is also disclosed the rack-and-pinion steer including the above said friction bearing.

EFFECT: facilitating specified rigidity for shaft of steer rack in its radial direction and in axial direction of drive gear; also facilitation of movable support with low friction resistance in axial direction of shaft; reduced effect of relaxation of stresses due to creep strain and heat prehistory.

9 cl, 10 dwg

 

The technical field to which the invention relates.

The present invention relates to a sliding bearing, and more precisely to the sliding bearing is applicable as a movable bearing for the shaft of the steering rack in the car with the steering mechanism is rack and pinion type.

Background of invention

Patent document 1: publication of Japanese patent No. 3543652.

In the steering mechanism is rack and pinion type shaft steering rack, the teeth of which engages with the teeth of the pinion, through the movable support in the form of a sliding bearing is based on the transmission, which serves as a housing. As the bearings have proposed various bearings made of plastic, and such bearings made of synthetic plastics usually are able to serve the movable support shaft steering rack with a certain mate.

Disclosure of the invention, tasks

If the sliding bearing made of synthetic plastic material provides a strong coupling with the shaft steering rack, on which it is based, shaft steering rack can be firmly installed in the radial direction with a given stiffness. However, as shaft steering rack tightly tightened, increasing the frictional resistance to sliding in the axial direction, making it impossible to provide a support for the shaft Rulev the th Reiki with satisfactory kinematic characteristics. On the other hand, in the case of weak coupling shaft, steering rack, you can count on receiving satisfactory axial kinematic characteristics with low frictional resistance to sliding shaft steering rack. However, in addition, there is a significant axial displacement of shaft steering rack and a gap between the sliding bearing and shaft steering rack, which has an adverse slope rigid supports in the radial direction.

In addition, in the case of a sliding bearing made of synthetic plastic material between the bearing and shaft steering rack may be formed a gap due to creep of synthetic plastic material, resulting in a rigid support may be omitted in the radial direction. Moreover, if, in particular, is radial shrinkage as a result of stress relaxation synthetic resin due to heat history, there is the possibility that mate with the shaft steering rack will increase, resulting in a strong frictional resistance to sliding.

At the same time, shaft steering rack is typically movably rests on the bearing in two positions from the side adjacent to the leading gear, and the side remote from the pinion. In particular, in the area in the La steering rack from the side, adjacent to the leading gear, displacement in the radial direction of the pinion is more likely than offset in the direction of closer or farther away from the pinion to effect engagement between the teeth of the pinion and toothed rack. This shift section shaft steering rack from the side adjacent to the leading gear in the axial direction of the pinion, is in the opposite direction in accordance with the direction of rotation of the pinion. As a result, if the parcel shaft steering rack from the side adjacent to the leading gear, based on a sliding bearing with a strong coupling, there is a possibility that the efficiency of steering control will be significantly reduced in conjunction with the deformation of the bending shaft steering rack.

Moreover, in the case of a sliding bearing made of synthetic plastic material as a sliding bearing for the shaft of the steering rack in the car with the steering mechanism is rack and pinion type inner space of the transmission of the steering mechanism is rack and pinion type sealed, which is difficult for the air entrainment in the transmission and emission. Therefore, because of the forced suction and exhaust air there is a possibility of occurrence of abnormal noise and premature loss of a lubricant, such as with azocine oil, which fill the gap between the sliding bearing and shaft steering rack.

In the present invention considered the above described features, and its task is to create a sliding bearing and the steering mechanism is rack and pinion type for use in the car, for shaft steering rack support with a given rigidity in its radial direction and in the axial direction of the pinion, shaft steering rack provide a sliding bearing with low friction resistance in the axial direction of the shaft steering rack and weaken the effect of stress relaxation due to creep and thermal history.

Means of solving problems

The sliding bearing according to the present invention includes: a sleeve of synthetic plastic material having at least one annular groove made on its outer peripheral surface, and an endless annular elastic element mounted in the annular groove of the sleeve, and the sleeve has a pair of facing the inside inner peripheral surfaces, which are asymmetrically, a pair of slots, each of which is positioned in such a way that between them in the circumferential direction passes one facing the inside inner peripheral surfaces, and they allow such converted internally inside the peripheral surfaces move in the radial direction inward/outward another pair of slots, each of which is positioned in such a way that between them in the circumferential direction is another facing the inside of the inner peripheral surface, and they allow this facing the inside inner peripheral surfaces move in the radial direction inward/outward, and at least one pair of facing the outside inner peripheral surfaces, passing from the outer sides of the pair facing the inside of the inner peripheral surface in the radial direction, with each facing outwards from the inner peripheral surface forms a gap with the respective of the outer peripheral surface side of teeth and with the opposite end of the cylinder steering rack, which inserted and fixed in a through hole formed by a pair of facing the inside inner peripheral surfaces and a pair of facing the outside inner peripheral surfaces, and at least a section of each of the facing inside inner peripheral surfaces able to come into sliding contact with the corresponding outer peripheral surface of the shaft steering rack except the outer peripheral surfaces of the side teeth and the opposite end of the cylinder steering rack.

The sliding bearing according to the finding includes a sleeve, having a pair of facing the inside inner peripheral surfaces, which are asymmetrically, a pair of slots, each of which is positioned in such a way that between them in the circumferential direction passes one facing the inside inner peripheral surfaces, and they allow this facing the inside inner peripheral surfaces move in the radial direction inward/outward, and another pair of slots, each of which is positioned in such a way that between them in the circumferential direction is another facing the inside of the inner peripheral surface, and they allow this facing the inside inner peripheral surfaces move in the radial direction inward/outward. At least, the area of each of the facing inside inner peripheral surfaces able to come into sliding contact with the corresponding outer peripheral surface of the shaft steering rack except the outer peripheral surfaces of the side teeth and the opposite end of the cylinder steering rack. In addition, in an annular groove on the outer peripheral surface of the bushing has an endless annular elastic element. This ensures a bearing for the shaft of the steering rack with a given rigidity in the radial direction and the axial e.g. the no pinion, the offset shaft steering rack in the axial direction of the pinion is suppressed by a pair of facing the inside inner peripheral surfaces, and for axial movement of the shaft steering rack is provided movable bearing due to the low frictional resistance. In addition, each facing outwards from the inner peripheral surface forms a gap with the respective of the outer peripheral surface side of teeth and with the opposite end of the cylinder steering rack, which is inserted and fixed in a through hole formed by a pair of facing the inside inner peripheral surfaces and a pair of facing the outside inner peripheral surfaces. Therefore, by combining the described characteristics can reduce the effect of stress relaxation due to creep and thermal history.

Because synthetic plastic as a material for the manufacture of the sleeve has high abrasion resistance, low friction characteristic and the desired flexibility and rigidity, it is preferable that she had a low thermal expansion and contraction. In particular, among other things, you can specify synthetic plastic containing at least one of the substances, including Polyacetal resin, polyamide resin, polyolefin resin, and f is Romolo.

Endless annular elastic element has a circular, elliptical, rectangular or oval cross-section, but the present invention is not limited to these forms and the cross-section may be X-shaped, U-shaped or trapezoidal. Preferably the endless annular elastic element is made of natural or synthetic rubber or other elastic thermoplastic synthetic resin, for example a complex of the polyester elastomer. Such an endless annular elastic element can be usually used the ring. Endless annular elastic element mounted in the annular groove may partially protrude from the outer peripheral surface of the bushing. Alternatively, the endless annular elastic element may be entirely placed in the annular groove and does not protrude from the outer peripheral surface of the bushing. If the endless annular elastic element lies partially, its outer peripheral surface can come into contact with the inner peripheral surface of the housing, which has a sliding bearing, or alternatively, the endless annular elastic element may form an annular gap between its outer peripheral surface and inner peripheral surface of the body.

On the outer peripheral surface of the bushing may be made of at least one annular groove. If on the outer peripheral surface of the sleeve made lots of annular grooves in the respective annular grooves may include an endless annular elastic elements.

In the preferred embodiment, each facing the inside of the inner peripheral surface has a flat shape, but alternatively may have a convex shape or a concave shape with a radius of curvature equal to or greater than the radius of curvature of the cylindrical outer peripheral surface of the shaft of the steering rack. Enough to each facing the inside inner peripheral surfaces had a Central angle θ1 relative to the center shaft of the steering rack, so that at least a section of each of the facing inside inner peripheral surfaces included in sliding contact with the corresponding outer peripheral surface of the shaft steering rack except the outer peripheral surfaces of the side teeth and the opposite end of the cylinder steering rack and served as a support for the shaft of the steering rack in the radial direction and the axial direction of the pinion with a given stiffness. Preferably, each of the facing inside internal periphery the different surfaces has a Central angle θ1 of not less than 5° and not more than 90° relative to the center shaft of the steering rack, and in this case, each facing outwards from the inner peripheral surfaces may have a Central angle θ2 equal to (180°minus the angle θ1) relative to the center shaft of the steering rack. The plot or the whole of each of the facing inside inner peripheral surfaces may be in sliding contact with the corresponding outer peripheral surface of the shaft steering rack except the outer peripheral surfaces of the side teeth and the opposite end of the cylinder steering rack.

In one of the embodiments, each of the slots is open at one end in the axial direction of the sleeve and is held in the axial direction from one end to near the other end in the axial direction of the sleeve ring groove. Each of these slots may be parallel to the axial direction, or alternatively, be inclined in the axial direction. In addition, one slot may be parallel to the axial direction, and the other slot may be inclined in the axial direction.

The sleeve can optionally have at least one pair of slots, each of which is opened from the other end face in the axial direction of the sleeve is held in the axial direction from the other end to a region near the first end face in the axial direction of the sleeve ring groove choosing the proper way is on the side of teeth and with the opposite end of the cylinder steering rack. Moreover, the sleeve can have the main part of the building, including facing the inside of the inner peripheral surface facing outward of the inner peripheral surface of the outer peripheral surface, an annular groove and a multitude of projections, made in one piece on the outer peripheral surface of the main section of the casing and spaced from each other around the circumference, with many protrusions may come into contact with the inner peripheral surface of the housing, through which passes the shaft of the steering rack. In this case, in one embodiment, the implementation of one of the many ledges is placed between a pair of spaced around the circumference of the slots, between which lies one of facing the inside inner peripheral surfaces and the other of the sets of protrusions is placed between another pair of spaced around the circumference of the slots, between which is located the other facing the inside of the inner peripheral surface. The main part of the building may have the same wall thickness in areas facing the inside inner peripheral surfaces facing the outside inner peripheral surfaces, but may have walls in small or large thickness facing the inside inner peripheral surfaces and the walls of the small or large thickness on converted n is the Rouge inner peripheral surfaces.

The sliding bearing according to the invention may additionally include a means of positioning for positioning the sleeve in the circumferential direction relative to the inner peripheral surface of the shell to ensure the location of the sleeve relative to the shaft of the steering rack, in which one of the face outward of the inner peripheral surface forms a gap with the outer peripheral surface side of teeth shaft, steering rack, which is inserted and fixed in a through hole formed facing the inside inner peripheral surfaces facing the outside inner peripheral surfaces, and the other facing outward of the inner peripheral surface forms a gap with the outer peripheral surface of the side opposite to the toothed side of the shaft, steering rack, and, at least, the area of each of the facing inside the inner peripheral surface is in sliding contact with the corresponding outer peripheral surface of the shaft steering rack except the outer peripheral surfaces of the side teeth and the opposite end of the cylinder steering rack.

In one embodiment, the implementation of the tool positioning has a ledge, made in one piece on the sleeve and a part uglublenie is on the inner peripheral surface of the shell.

Proposed invention the steering mechanism is rack and pinion type for a vehicle includes a pinion gear, shaft, steering rack, the teeth of which engages with the teeth of the pinion, a casing through which passes the shaft of the steering rack and the sliding bearing of the above described various forms, which is installed in the housing and on which rests the shaft of the steering rack to move relative to the body.

Housing proposed in the invention of the steering mechanism is rack and pinion type may be a hollow support element, on which rests the shaft of the steering rack together with the transmission housing to accommodate pinion. Preferably the housing is the transmission housing to accommodate the pinion and the bearing is located in the housing or in the transmission housing that serves as a case in one of the embodiments to provide a movable support section shaft steering rack from the side adjacent to such leading gear.

Advantages of the invention

In the present invention proposed a sliding bearing and the steering mechanism is rack and pinion type for use in a vehicle, which shaft for steering rack support with a given rigidity in its radial direction and in the axial direction of the pinion, shaft steering rack provide odijoo bearing with low friction resistance in the axial direction of the shaft steering rack and weaken the effect of stress relaxation due to creep and thermal history.

Further, the present invention is described in more detail with reference to the preferred embodiments of shown on the drawings. It should be noted that the present invention is not limited to these options for implementation.

Brief description of drawings

Figure 1 shows the cross-section of the preferred option for implementation in the direction of the arrows along the line I-I shown in figure 2;

figure 2 shows the left-hand upright projection variant implementation, illustrated in figure 1;

figure 3 shows the right-hand upright projection variant implementation, illustrated in figure 1;

figure 4 shows a top view of a variant of implementation, illustrated in figure 1;

figure 5 shows a bottom view of a variant of implementation, illustrated in figure 1;

figure 6 shows a partially enlarged explanatory view of a variant of implementation, illustrated in figure 1;

7 shows an explanatory view of a variant of implementation, in which an implementation option, shown in figure 1, used in car with steering rack and pinion type;

on Fig shows the right-hand upright projection variant implementation, illustrated in Fig.7;

figure 9 shows a partially enlarged explanatory view of another preferred variant implementation of the ing the invention; and

figure 10 shows a partially enlarged explanatory view of another preferred variant embodiment of the invention.

The best option of carrying out the invention

As shown in Fig.7 and 8, in this embodiment, the steering mechanism 1 of the rack and pinion type for a vehicle includes a pinion gear 2, the shaft 5 of the steering rack, the teeth 4 which engages with the teeth 3 of the pinion 2, the crankcase 6 gearbox, employee housing, through which passes the shaft 5 of the steering rack and the bearing 7 of the slide, which is mounted in the crankcase 6 transmission and on which rests the shaft 5 of the steering rack can be moved in the direction A, i.e. the axial direction relative to the transmission case.

Leading gear 2 having an axis 11 that can rotate around the axis in the direction R1 or R2 when turning the steering wheel. Carter 6 gearbox has a cylindrical inner peripheral surface 12, on which is mounted a bearing 7.

How, in particular, is shown in figure 1-5, the bearing 7 includes sliding sleeve of synthetic plastic material 17, on the outer peripheral surface 15 which is made annular groove 16, the endless annular elastic element 18 mounted in the annular groove 16 of the sleeve 17 and formed by a ring of natural or synthetic is rubber, and means 19 for positioning the positioning sleeve 17 in the direction b, i.e. in the circumferential direction relative to the inner peripheral surface 12 of the crankcase 6 gearbox.

The sleeve 17 has a main section 35 of the casing and the two tabs 36 and 37, made in one piece on the outer peripheral surface 15 of the main section 35 of the casing and spaced from each other by 180° in the direction of the Century. the Main section 35 of the housing includes an outer peripheral surface 15, an annular groove 16, a pair of facing the inside inner peripheral surfaces 21 and 22 flat shapes, which are asymmetrically with an interval of 180° in direction, two pairs of slits 23 and 24, and 25 and 26, respectively, are arranged in such a way that between them in the direction In are facing the inside inner peripheral surfaces 21 and 22, and they allow the respective facing the inside inner peripheral surfaces 21 and 22 to move inward/outward in the radial direction, a pair of facing the outside inner peripheral surfaces 27 and 28, which are respectively located on the outer side facing the inside inner peripheral surfaces 21 and 22 in the direction, and another pair of slots 29 and 30, which are partially cut appropriate facing outward of the inner peripheral the surfaces 27 and 28 in the direction of the Century

The outer peripheral surface 15 is partially cut in the direction In slots 23 to 26, and 29 and 30 form a gap 38 with the inner peripheral surface 12 of the crankcase 6 gearbox.

Facing the inside of the inner peripheral surface 21 has a Central angle θ1 of not less than 5° and not more than 90°, in this embodiment, is 30° relative to the center Of the shaft 5 of the steering rack, and facing the inside of the inner peripheral surface 22 also has a Central angle θ1 of not less than 5° and not more than 90°, in this embodiment, is 30° relative to the center Of the shaft 5 of the steering rack. How, in particular, is shown in Fig.6-8, plot facing the inside inner peripheral surfaces 21 are capable of entering into a rolling, predominantly linear contact with the outer peripheral surface 42 with the exception of the outer peripheral surface side of the teeth 4 and the opposite side of the shaft 5 of the steering rack on the outer peripheral surface 41 of the shaft 5 of the steering rack. The plot is facing the inside of the inner peripheral surface 22 is also able to enter into a rolling, predominantly linear contact with the outer peripheral surface 43 with the exception of the outer peripheral surface side of the teeth 4 and the opposite side of the shaft 5 of the steering rack on the outer peripheral surface 41 of the shaft 5 rul the howl of Reiki. Each of the respective ends 44 facing the inside inner peripheral surfaces 21 and 22 may have a beveled surface in the direction of A.

Each of the slits 23 and 24, between which direction is held facing the inside of the inner peripheral surface 21 that is open at one end 45 in the direction of a main section 35 of the housing sleeve 17 and passes in the direction from one end 45 to the area near the other end 46 in the direction of a main section 35 of the housing sleeve 17 in an annular groove 16. Each of the slots 25 and 26, between which direction is held facing the inside of the inner peripheral surface 22, is also open at one end 45 in the direction of a main section 35 of the housing sleeve 17 and passes in the direction from one end 45 to the area near the other end 46 in the direction of a main section 35 of the housing sleeve 17 in an annular groove 16.

Facing outward of the inner peripheral surface 27 having a Central angle θ2 (180° minus the angle θ1) relative to the center Of the shaft 5 of the steering rack from the side of the teeth 4 of the shaft 5 of the steering rack, forms a gap 49 with the outer peripheral surface 48 from the side of the teeth 4 on the outer peripheral surface 41 of the shaft 5 of the steering rack, which is inserted and fixed in a through hole 47 is formed facing the inside inner preferentemente 21 and 22 and facing outwards of the inner peripheral surfaces 27 and 28. Facing outward of the inner peripheral surface 28 having a Central angle θ2 (180° minus the angle θ1) relative to the center Of the shaft 5 of the steering rack on the side opposite the teeth 4 of the shaft 5 of the steering rack, forms a semi-cylindrical gap 51 with the outer peripheral surface 50 on the side opposite the teeth 4 of the shaft 5 of the steering rack, on the outer peripheral surface 41 of the shaft 5 of the steering rack.

Each of the slots 29 and 30, which is asymmetrically with an interval of 180° in direction and is on the side of the teeth 4 and the opposite side of the shaft 5 of the steering rack, open from the other end 46 of the main section 35 of the housing sleeve 17 and passes towards And from the other end 46 to the area near the end 45 of the main section 35 of the housing sleeve 17 in an annular groove 16.

Between a pair of slots 23 and 24 in the direction of the passes In the protrusion 36 having a cylindrical outer peripheral surface 55 and capable of its outer peripheral surface 55 to come into tight contact with the inner peripheral surface 12 of the crankcase 6 gearbox, through which passes the shaft 5 of the steering rack due to the elastic force of the sleeve 17 made of synthetic plastic. Between a pair of slots 25 and 26 in the direction of the passes In the projection 37 having a cylindrical outer peripheral surface 56 and capable of its outer periphery the major surface 56 to come into tight contact with the inner peripheral surface 12 of the crankcase 6 gearbox, through which passes the shaft 5 of the steering rack due to the elastic force of the sleeve 17 made of synthetic plastic. Thus, using the tabs 36 and 37 of the sleeve 17 is adapted to the inner peripheral surface 12 of the crankcase 6 gearbox.

Between the outer peripheral surface 57 of the endless annular elastic element 18 and the inner peripheral surface 12 of the crankcase 6 gearbox is annular gap 58 is narrower than the gap 38. Endless annular elastic element 18 enters an annular groove 16 in such a way that it partially protrudes from the outer peripheral surface 15 and the elastic slightly reduces the diameter of the main section 35 of the housing sleeve 17.

Tool 19 positioning has a ledge 60, made in one piece on the outer peripheral surface 15 of the main section 35 of the housing. The protrusion 60 is engaged with the crankcase 6 transmission, i.e. in the recess 59 on the inner peripheral surface 12 of the crankcase 6 gearbox with its front end in the direction and with its rear end in the direction A. as a result, the sleeve 17 is not rotated relative to the crankcase 6 transmission direction and is not included in the crankcase 6 gearbox more than is necessary. At the same time facing the inside inner peripheral surfaces 21 and 22, the tabs 36 and 37 and the slits 23 to 26, and 29 and 30 positions niroot relative to the teeth 4 of the shaft 5 of the steering rack.

In the above-described steering mechanism 1 of the rack type sleeve 17 has a pair of facing the inside inner peripheral surfaces 21 and 22 flat shapes, which are asymmetrically, and two pairs of slits 23 and 24, and 25 and 26, respectively, are arranged in such a way that between them in the direction of are facing the inside inner peripheral surfaces 21 and 22, and they allow the respective facing the inside inner peripheral surfaces 21 and 22 to move inward/outward in the radial direction C. the Area of each of the facing inside inner peripheral surfaces 21 and 22 is able to come into sliding contact with corresponding one of the outer peripheral surfaces 42 and 43 except the outer peripheral surface side of the teeth 4 and the opposite side of the shaft 5 of the steering rack. In addition, in the annular groove 16 of the sleeve 17 has an endless annular elastic element 18. This ensures a bearing for the shaft 5 of the steering rack with a given stiffness in the direction or the axial direction of the pinion 2, i.e. in the vertical direction on Fig, the displacement of the shaft 5 of the steering rack in the axial direction of the pinion 2 is suppressed by a pair of facing the inside inner peripheral surfaces 21 and 22, and to move them in the direction And provides the I movable bearing due to the low frictional resistance. In addition, facing outwards of the inner peripheral surfaces 27 and 28 respectively form the gaps 49 and 51 with the respective outer peripheral surfaces 48 and 50 from the side of the teeth 4 and the opposite side of the shaft 5 of the steering rack, which is inserted and fixed in the through-hole 47. Therefore, by combining the described characteristics can reduce the effect of stress relaxation due to creep and thermal history.

In the described embodiment, each facing the inside inner peripheral surfaces 21 and 22 is flat, but alternatively it may be convex, i.e. a convex semi-cylindrical form, as shown in Fig.9. Also alternatively, each facing the inside inner peripheral surfaces 21 and 22 may have a concave shape with a radius of curvature greater than the radius of curvature of the cylindrical outer peripheral surface 41 of the shaft 5 of the steering rack, i.e. a concave semi-cylindrical shape, as shown in figure 10.

1. The sliding bearing, comprising: a sleeve of synthetic plastic material having at least one annular groove made on its outer peripheral surface; and an annular elastic element mounted in the annular groove mentioned sleeve, and the sleeve has the couple facing the inside inner peripheral surfaces, which are asymmetrically; a pair of slots, each of which is positioned in such a way that between them in the circumferential direction passes one facing the inside inner peripheral surfaces, and they allow this facing the inside inner peripheral surfaces move in the radial direction inward/outward; another pair of slots, each of which is positioned in such a way that between them in the circumferential direction is another facing the inside of the inner peripheral surface, and they allow this facing the inside inner peripheral surfaces move in the radial direction inward/outward; and at least one pair of facing outwards the inner peripheral surfaces passing from the outer sides of the pair facing the inside of the inner peripheral surface in the radial direction, with each facing outwards from the inner peripheral surface forms a gap with the respective of the outer peripheral surface side of teeth, steering rack and with opposite sides of the shaft, steering rack, which is inserted and fixed in a through hole formed by a pair of facing the inside inner peripheral surfaces and a pair of facing the outside inner peripheral surfaces,and, at least, the area of each of the facing inside inner peripheral surfaces able to come into sliding contact with the corresponding outer peripheral surface of the shaft steering rack except the outer peripheral surfaces of the side teeth of the steering rack and the opposite end of the cylinder steering rack.

2. The sliding bearing according to claim 1, in which facing the inside of the inner peripheral surface has a convex shape or a concave shape or a flat shape.

3. The sliding bearing according to claim 1 or 2, in which each of the facing inside inner peripheral surfaces has a Central angle θ1 of not less than 5° and not more than 90° relative to the center shaft of the steering rack, and each facing outwards from the inner peripheral surface has a Central angle θ2 (180° minus the angle θ1) relative to the center mentioned shaft steering rack.

4. The sliding bearing according to claim 1 or 2, in which each of the slots is open at one end in the axial direction mentioned sleeve and is held in the axial direction from one end to near the other end in the axial direction of the said sleeve ring groove.

5. The sliding bearing according to claim 1 or 2, in which said sleeve additionally has at least one pair of slots, each of which is open with the other face is in the axial direction of the said sleeve, passes in the axial direction from the other end to a region near the first end face in the axial direction of the said sleeve ring groove and accordingly is on the side of teeth, steering rack and with opposite sides mentioned shaft steering rack.

6. The sliding bearing according to claim 1 or 2, in which said sleeve main part of the building, including facing the inside of the inner peripheral surface facing outward of the inner peripheral surface of the outer peripheral surface, an annular groove, and a multitude of projections, made in one piece on the outer peripheral surface of the main section of the casing and spaced from each other in the circumferential direction, with many ledges able to come into contact with the inner peripheral surface of the housing, through which passes the shaft of the steering rack.

7. The sliding bearing according to claim 6, in which one of the many ledges is placed between a pair of spaced around the circumference of the slots, between which lies one of facing the inside inner peripheral surfaces and the other of the sets of protrusions is placed between another pair of spaced around the circumference of the slots, between which is located the other facing the inside of the inner peripheral surface.

8. Bearing how the program according to any one of claims 1, 2 or 7, further comprising: means positioning for positioning the said sleeve in the circumferential direction relative to the inner peripheral surface of the shell.

9. The steering mechanism is rack and pinion type for a vehicle, comprising: a pinion gear; a shaft steering rack, the teeth of which engages with the teeth of the mentioned driving gear; a housing through which the said shaft steering rack; and a sliding bearing according to any one of claims 1 to 8, which is installed in said housing and on which rests the said shaft steering rack can be moved relative to the said casing.



 

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3 cl, 5 dwg, 1 tbl

FIELD: the invention refers to the field of machine building namely to transformers of alternate/reciprocal motion into rotary and vice-versa and may be used in piston engines, pumps, compressors and other gears.

SUBSTANCE: the transformer is a planetary toothed mechanism consisting of a non-rotating central pinion with inner toothed gearing making alternate/reciprocal motion relatively to the axle rotating together with firmly connected with it from one side and interacting with the central pinion-satellite. The length of the toothed rim of the satellite is two times smaller then the length of the toothed rim of the central pinion, of the link or of the mechanism providing continuous engagement of the teeth of the central pinion and the satellite. The link and the mechanism are fulfilled in such a manner that install marginally allowable distance between the positions of their joining with the central pinion and with the satellite not installing the maximum allowable value of this distance. The central pinion and the satellite have figured different profile according to their toothed rims.

EFFECT: increases the coefficient of efficiency of transformation of the alternate/reciprocal motion into rotary and vice-versa and simplifies the construction of the toothed transformer.

10 cl, 6 dwg

FIELD: mechanical engineering.

SUBSTANCE: according to invention, body 10 forms prismatic chamber 12 whose cross section is oval of odd order formed from arcs 34, 36, 38 with first smaller radius of curvature and arcs 40, 42, 44 with second, larger radius of curvature changing continuously and differentially one into the other. Thus, corresponding cylindrical parts of inner surface of chamber are formed. Chamber 12 accommodates rotating piston 60 whose cross section forms oval of the order smaller by 1 than order of chamber 12. Opposite parts of side surface are formed on rotating piston 60, one of which rotates in part of inner surface of radius of curvature equal to said part and the other adjoins opposite part of inner surface to slide along surface. rotating piston 60 divides chamber 12 in any position into two working spaces 78, 80. Instantaneous axes of rotation 112, 114 of rotating piston 60 are determined on middle plane of piston being fixed for a short time. Working agent to set rotating piston 60 into motion is periodically introduced into working spaces. Rotating piston 60 rotates in each phase of its motion in one of opposite parts of its side surface 70 in corresponding part of inner side surface 62 of chamber around corresponding instantaneous axis of rotation 112 and slides by opposite part of its surface 72 along corresponding opposite part of inner side surface 54 of chamber 12 to stop, i.e. until it comes into extreme position. Then, to execute following phase of movement, instantaneous axis of rotation jumps from previous position into second possible position 114 relative to piston and is fixed in this position for a short rime. Driven or driving shaft 102 is in engagement with rotating piston 60. To prevent kinematic ambiguity of instantaneous axis of rotation in extreme position, instantaneous axis of rotation is mechanically fixed in each extreme position for a time (Fig.1).

EFFECT: improved efficiency of machine in operation.

20 cl, 79 dwg

Gearing device // 2289046

FIELD: mechanical engineering.

SUBSTANCE: gearing device comprises two gear racks and gear wheel. The recess is provided between the racks (26) and (28) to prevent gear wheel (10) against the contact with both of the racks simultaneously. The adapting gear member between two racks is defined by the convex gear arc. When gear wheel (10) engages adapting member (30), it disengages rack (26) immediately before the moment when it engages rack (28).

EFFECT: improved structure.

13 cl

FIELD: mechanical engineering.

SUBSTANCE: gear converter comprises nonrotating shaped gear wheel (1) with inner teeth engagement, which reciprocates with respect to semiaxle (3) that rotates together with shaped pinion (2) secured to the semiaxle from one side and cooperating with shaped gear wheel (1). The length of the gear rim of pinion (2) is twice as less as that of gear rim of shaped gear wheel (1). The continuous engagement of the teeth of shaped gear wheel (1) with pinion (2) is provided by means of the cooperation of cam (4) that is connected with pinion (2) with roller (8) freely rotating around its axis (9).

EFFECT: enhanced efficiency.

7 cl, 6 dwg

FIELD: machine building.

SUBSTANCE: plain bearing includes fibre-glass power housing (3), carbon-fibre reinforced antifriction layer (1) and damping layer (2) made from material formed with alternating fibre-glass and carbon-fibre monolayers.

EFFECT: improving reliability of bearing owing to reduced residual heat and process stresses in bearing material, and avoiding delamination of bearing material and increasing bearing manufacturability.

2 dwg

FIELD: engines and pumps.

SUBSTANCE: friction pair comprises one part made from metal (distributor) and second part made from composite material consisting of thermoplastic binder and filler (antifriction washer). Filler comprises fiber glass, mineral substances, solid grease fillers from fluoroplastic, molybdenum disulphide or graphite. Second part is made from composite polymer material comprising additionally fluorine organic surfactants that represent derivatives of isobutene with fluorine-containing organic substituents. Fluorine organic surfactants form protective layers on contact surface facilitating operation in non-flow lubrication conditions. Formation of protective layers occurs with heat absorption from contact zone. Washer is fitted in through bore of impeller cover in contact with metal disk arranged between impeller disks and rigidly jointed therewith for surplus heat rejection.

EFFECT: higher wear resistance.

2 cl, 1 dwg

Friction bearing // 2377449

FIELD: machine building.

SUBSTANCE: invention relates to machine building, particularly to friction bearing, manufactured from non-metallic composite materials and can be used in friction couples, provided for operation as in normal conditions as in corrosive working mediums at specific pressure up to 250 MPa, sliding velocity up to 5 m/s. Friction bearing of cylindrical shape contains pressure vessel implemented for instance from glass-fibre plastic, antifrictional layer and thrust collar. Thrust collar is glued to pressure vessel and is implemented perpendicularly to longitudinal axis of bearing axis. Antifrictional layer is connected to pressure vessel through damping layer, implemented, for instance from glue film VK-3. Thrust collar is implemented from both sides by butts of pressure vessel. Thrust collar is implemented from flat plate, manufactured from coal plastic or coal glass-fibre plastic.

EFFECT: increasing of axial durability of bearing, excluding of exfoliation between antifriction and pressure layers, that increases life time and increases reliability of products operation.

4 cl, 1 dwg

FIELD: machine building.

SUBSTANCE: invention relates to anti-friction layer for bearing element. Proposed anti-friction layer (4) for bearing element (1), in particular, plain bearing, made in synthetic polymer layer, in particular, rubber or lacquer layer. The said polymer layer consists of the 1st partial (5) and one 2nd partial layer (6). Aforesaid layer (5) consists of the 1st polymer, while layer (6), abutting on locked structural element, consists of the 2nd polymer, other than the 1st one. Layer (6) comprises, at least, one lubricant at the amount of 15 wt % to 50 wt %. Layer (5) comprises, at least, one hard consistency lubricant at the amount of 5 wt % to 20 wt %, provided that the amount of, at least, one hard consistency lubricant exceeds that in layer (5). The invention covers also bearing element (1), particularly, plain bearing, with bearing metal layer (2), bearing metal layer (3) applied onto layer (2) anti-friction layer (4) applied onto layer (3). Note here that layer (4) of layer (4) is arranged between layers (6) and (3).

EFFECT: perfected anti-friction layer to sustain higher loads.

21 cl, 2 dwg, 3 ex, 1 tbl

FIELD: machine building.

SUBSTANCE: invention relates to plain bearing for suspension strut of four-wheel vehicle. Proposed bearing comprises upper collar (3) made in synthetic rubber and furnished with circular lower surface (2), lower collar (5) made in reinforced-synthetic rubber and applied on the said upper collar to revolve about its axis. The said lower collar has also circular upper surface (4) arranged opposite surface (2), and circular thrust part (6) made in synthetic rubber and arranged between surfaces (2) and (4). Lower collar (5) has surface (36) making a seat of cylindrical spring (61) and arranged on lower surface (25). Lower collar (5) comprises circular thrust section (12), upper cylindrical section (24), formed entirely on upper surface (23) of section (12). Surface (4) and lower cylindrical section (26) are formed on lower collar (5). The lower cylindrical section (26) is formed entirely on surface (25) of circular thrust section (22). Note here that surface (25) of section (22) arranged on radially outer surface (26) makes surface (36) of the seat of spring (61). Note also that sections (12), (24) and (26) comprise multiple tapered chambers.

EFFECT: reduced vehicle suspension weight and running gear cost.

13 cl, 6 dwg

Bearing element // 2329415

FIELD: engines and pumps.

SUBSTANCE: invention relates to a bearing element with a metal thrust body covered with a layer of bearing metal above which laid is a polymer layer, composed of polyamidimide resin, molybdenum disulfide (MoS2) and graphite. The bearing element is made up of a metal thrust body, a layer of metal laid onto the said metal body, a polymer layer laid on over the metal layer and, if necessary, some other layers to be laid in between the metal and polymer layers. The polymer layer includes polyamidimide resin, molybdenum disulfide (MoS2) and graphite. Here, note that the content of polyamidimide resin is selected from the range with the lower limit of 23.08 percent by weight and the upper limit of 35.78 percent by weight, that of MoS2 is selected from the range with the lower limit of 40.37 percent by weight and upper limit of 48.08 percent by weight, while the graphite content is selected from the range with the lower limits of 23.85 percent by weight and upper limit of 28.85 percent by weight.

EFFECT: higher wear resistance, antirust protection, ruling out friction-caused micro welding.

12 cl, 2 dwg, 2 tbl

FIELD: mechanical engineering; bearings.

SUBSTANCE: proposed bearing contains layer of backing material, porous layer placed on backing layer and bearing extruded material layer applied by impregnation to porous layer and having continuous hardened structure including continuous polytetrafluoroethylene matrix and separate particles of addition material. Bearing material layer has part of porous layer. Claimed in invention is bearing plastic material which includes extruded non-baked tape or strap designed for impregnation in porous layer arranged on backing material and including polytetrafluoroethylene matrix and separate particles of addition material. Claimed also is method of producing plastic material of bearing according to which first extruded non-baked tape or strap is made containing polytetrafluoroethylene matrix and separate particles of addition material, and then tape is placed by impregnation in porous layer on backing material and then is baked at temperature high than melting temperature of polytetrafluoroethylene to form continuous hard layer of bearing material.

EFFECT: provision of bearing without bulges and featuring improved wear resistance and higher erosion resistance.

38 cl, 1 tbl, 3 ex, 1 tbl

Support of rod // 2308622

FIELD: mechanical engineering.

SUBSTANCE: invention relates to supports of rods of control valves operating within wide temperature range. Proposed support of rod has polymeric bushing placed and press-fitted in holder. Ring grooves, depth 0.1-0.35 of thickness of polymeric bushing, are made on inner surfaces of polymeric bushing and holder. Ring grooves on polymeric bushing are displaced lengthwise relative to ring grooves of holder. Ring grooves of polymeric bushing and holder are equal. Width of ring grooves is equal to distance between grooves. Ring grooves on polymeric bushing are displaced lengthwise relative to ring grooves of holder by width of ring groove. Width of ring grooves of holder is greater than width of ring grooves of polymeric bushing, and their displacement is symmetrical.

EFFECT: improved reliability of support at higher temperatures owing to reduction of radial load on rod.

3 cl; 3 dwg

FIELD: mechanical engineering.

SUBSTANCE: multi-unit axial bearing comprises housing and roll and slide bearings mounted inside the housing. The side bearing is a hydrodynamic one and is made of a steel pivot with the shaped surface that is mounted on the face surface of the shaft by means of a screw and thrust bearing made of a disk which is made of antifriction material and mounted in the housing.

EFFECT: prolonged service life and enhanced reliability.

2 dwg

FIELD: mechanical engineering.

SUBSTANCE: method comprises covering a centered mandrel with antiadhesive layer, winding preliminary prepared prepreg on the mandrel to form the antifriction layer on the blank, winding the basic load-bearing layer, and winding the antiadhesive layer. The stay made of uniformly distributed pressing members interconnected through a flexible thread is mounted on the antiadhesive layer. The blank is compressed by winding the load-bearing jacket. The pressing members penetrate into the flexible blank and provide the directed disorientation over the periphery and in the bulk of the blank. After solidification of the piping blank, the jacket and the stay with pressing members are removed and the blank is machined to obtain required sizes of the plain bearing.

EFFECT: enhanced strength, quality, and reliability of the plain bearing.

3 dwg, 1 tbl

Support of rod // 2308622

FIELD: mechanical engineering.

SUBSTANCE: invention relates to supports of rods of control valves operating within wide temperature range. Proposed support of rod has polymeric bushing placed and press-fitted in holder. Ring grooves, depth 0.1-0.35 of thickness of polymeric bushing, are made on inner surfaces of polymeric bushing and holder. Ring grooves on polymeric bushing are displaced lengthwise relative to ring grooves of holder. Ring grooves of polymeric bushing and holder are equal. Width of ring grooves is equal to distance between grooves. Ring grooves on polymeric bushing are displaced lengthwise relative to ring grooves of holder by width of ring groove. Width of ring grooves of holder is greater than width of ring grooves of polymeric bushing, and their displacement is symmetrical.

EFFECT: improved reliability of support at higher temperatures owing to reduction of radial load on rod.

3 cl; 3 dwg

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