Guiding roller facilitating increased service life of chain

FIELD: machine building.

SUBSTANCE: guiding roller (8) for link chains, for example, for round-link chains or chains out of profile steel, has recesses (28) along perimetre for horizontal links of chains and recesses (35) for vertical links of chains. Recesses (35) for vertical links of the chains are separated from each other with teeth (36). Sides (39, 41) of teeth (36), where a vertical link of the chain adjoins under load, are calculated and profiled by a special procedure. The calculation ensures a gap between the vertical link of the chain with its front part and the side surface of the tooth untill the chain is loaded to a specified load. Side surface of the tooth and front part of the corresponding vertical link of the chain contact only after specified load onto the chain.

EFFECT: raised efficiency of chain.

29 cl, 7 dwg, 1 tbl

 

The so-called kruglozerny chains consist of concatenated with each other separate round links. Each of the adjacent chain links are rotated to each other by 90 relative to the longitudinal axis of the chain. Each link krupasindhu circuit consists of a bent section of wire, the free ends of which are welded end-to-end with each other.

If you look down on the flat side, chain link consists of two straight, parallel to each other areas, turning at each end in the arc of a semicircle. The radius of both arcs of the semicircle corresponds to the distance between the centers of the straight sections. The projection of such a planar chain link krupasindhu circuit on a plane parallel to the flat side of the chain link, limited to two lines, one of which is an external circuit, and the other internal circuit. Therefore, the external circuit consists of two straight sections parallel to each other, and the two arcs of a semicircle, the diameters of which correspond to the distance between the straight sections. The inner loop is in all places at the same distance from the external circuit, in accordance with the diameter of the wire.

Such kruglozerny circuit is used for the movement of parts or seizures. They may, for example, pallets transported along the path of their transportation, or they can be used for the operation of load-handling means: the so-called chain rods. In dvuhvetvevym or mnogovekovyh chain rods chain should be carried out through the guide rollers. Guide rollers interact by kinematic closure with chain. When the turnover of the chain around the guide roller distinguish vertical links and horizontal chain links. This difference arises as to the provisions to the guide roller. Under horizontal (lying) chain link see link in the chain, turned the flat side of the axis of rotation of the idler. Vertical (standing) chain link is a link in the chain, flat sides which are perpendicular to the axis of rotation of the idler.

In known up to the present time, the guide rollers of the horizontal chain links are only used to create the connection with the guide roller by the kinematic circuit. Due to the inevitable free-wheeling between the horizontal chain links significantly loaded vertical chain link located at the top in relation to the direction of movement of the chain around the guide roller.

From EP 0269557 A1 it is known intended for the drive chain gear wheel adapted for altering the pitch of the chain due to wear.

When turnover under load chain through the chain gear wheel between adjacent links of the chain vosn is producing the movement. Movement occurs because by itself stretched the chain under load is forced to rotate by means of the guide roller in a circular motion.

The relative movement between the links of the chain of causes in this case, the wear due to mechanical abrasion and as a result the reduction in the appropriate places on the thickness of the chain link. Under the thick chain link specialist understands the diameter of that wire is in the proper location.

Due to changes in the thickness of the chain link, the chain becomes longer, that is, its frequency is no longer coincides with the division of the idler. To take this into account, the notches for the circuit in known guide rollers have a special shape for the vertical chain links.

Excavation for the vertical chain links form passing in the direction of the perimeter chain gears groove, passing through the notches for the horizontal chain links. The bottom of the groove describes in a broad sense, a regular n-gon, with n equal to the number of slots for the horizontal chain links. The sides of a regular n-gon, respectively, are segments of arcs of constant radius of curvature is very large compared to the radius of curvature of the outer contour of the individual chain link. The bottom of the recess has no curvature along its stroke. Only at the end of it re the result in the rounded corner of the n-gon, which begins following the bottom of the recess adjacent the notches for vertical chain link. This angle is understood in a broad sense as well as the tooth. The top of the tooth is in the center, i.e. the center of the recess for the horizontal chain link. It clearly ends below the plane defined by the axis of rotation adjacent the flat sides of the chain link.

Figure 2 of this publication according to the prior art shows the relationship between the vertical chain link and the corresponding recess in the operation unused krupasindhu chain. Adjacent horizontal chain links fixed vertical chain link with a distance to the bottom of the recess to the corresponding vertical chain link. Only when the tension of the chain due to wear, there is a slight misalignment of the vertical chain link, and as a result, the chain link its front part, aimed in the direction of the load attached to the bottom of the excavation.

Tangent to the place of contact between the bottom of the recess and the outer contour of the chain link passes under a very acute angle to the longitudinal axis of the vertical chain link that effectively makes it impossible for the application of force from the guide roller on krupasindhu chain or, on the contrary, through the place of touch in the form of a point.

According to this object of the invention is the creation of a guide roller, less strain on the chain is allowing this higher load zinevych circuits of a given material, compared with the combination of this link of the chain guide roller according to the prior art.

The designers of the applicant found that a higher load or more continuous operation of the circuit is possible, if the rotation of the vertical chain link, starting with a certain load is supported by the guide roller in the longitudinal direction. To achieve this, you should take special steps to configure adjacent the sides of the tooth to which adjacent its front part under load vertical chain link.

The new guide roller is provided as a guide roller according to the prior art for changing the direction zinevych circuits, in particular kruglozernyh chains or chains of profile steel chain rods. Each link of the link chain consists of a bent section of wire and has a flat shape. The figure consists of two parallel to each other plots and two semicircular arcs.

According to the invention the guide roller has a base body rolling surface on the outer periphery and located centrally to the surface of the outer perimeter of the rotation axis.

The base body of the roller contains recesses for circuit performed on the surface on the outer periphery with the possibility of placing the horizontal chain links, so that they n the twisting turning through the transverse side or the flat side.

In addition, the guide roller includes a notch in the circuit is also performed on the surface on the outer periphery with the possibility of placing the vertical chain links. The number of notches for vertical links of the chain corresponds to the number of slots for the horizontal chain links. Each notch for the vertical chain links has reference sites, which may rely on the appropriate link of the chain, at least adjacent to the arc as part of their direct site. Excavation for the vertical chain links are located respectively between adjacent grooves for horizontal chain links and intersect with them.

Between adjacent slots for the vertical chain links are radial teeth, designed to accommodate the vertical chain link in the longitudinal direction. Each of the teeth is limited to two pointing in the direction of the periphery of the sides of the tooth.

Each lateral side of the tooth determines the line of curvature of the side of the tooth, located in the plane of symmetry passing through the notch for the vertical chain links and located perpendicular to the axis of rotation. This plane of symmetry coincides with the plane of symmetry of the vertical chain link and passes between the two located on the sides of the side surfaces defined by a vertical link price is I. Under lateral surfaces should understand such a plane, which tangentially touches the chain link on the corresponding side.

The position of the side of the tooth is designed in such a way that the line of curvature of the side of the tooth is in the plane of symmetry of the distance from pointing in the direction of the load in the external circuit of the arc of the semicircle related to chain link that is located in the recess for the circuit. This distance there if both neighboring horizontal chain link centered and positioned in their respective grooves for the circuit without the influence of external force.

Because of the distance between the center line of curvature of the side surface of the tooth and the outer contour of an arc of a semicircle located in the same plane intersecting the axis of rotation at right angles between the corresponding front part of the chain link and the adjacent lateral face of the tooth occurs arcuate curved and wedge-shaped slit whose width increases toward the top of the tooth. This gap is designed so that it fell upon exceeding a predetermined force acting in krupasindhu chain. This closure is due to the elastic deformation of the corresponding arc of the semicircle of the chain link.

To obtain the most good supports for vertical chain link tooth has them is th greatest radial height. However, the radial height is limited so as not to interfere with the tangential unwinding link chain with a guide roller. The optimal relationship obtained when the height of the tooth component from 0.16 to 0.75 on the thickness of the chain link above the surface defined adjacent to the axis of rotation of the side surfaces of the horizontal chain link, he gets a tooth.

The height of the tooth, as soon becomes clear, depends on the thickness used for chain link wire.

Good support of the chain link side of the tooth is reached, if the side face of the tooth has a curvature along the two axes. As a consequence, the optimal distribution of forces due to the large contact surface on the side of the tooth and on the front of the chain link.

Under the "curvature along two axes" refers to the curvature corresponding to the center of curvature of which is located on the line passing parallel to the line of curvature of the side of the tooth at an appropriate distance. Measured relative to this line, the radius of curvature of preferably not less than half the diameter of the wire from which made the chain link.

The distance between the corresponding front part of the chain link and the side of the tooth or between an external contour and a line of curvature of the side of the tooth can be calculated by approximation through the m two touching circles. One touching the circle is an approximation of the external circuit arc vertical chain link attached to the guide roller. Thus, define the center of the contact circle.

The second approximation is a circle that fits your line of curvature of the side of the tooth and determines, therefore, another center. The center contact of the circumference side of the tooth is displaced in the direction of the load relative to the center contact of the circumference of the chain link. The offset value again depends on the thickness of the wire for chain link and the length of the chain link.

It is advantageous if both the center contact of the circles are located on a straight line parallel to the straight sections of the vertical chain link.

Depending on the type of chain link can also be preferred acute-angled shape.

The line of curvature of the side of the tooth may be strictly circular shape,simplifying the manufacture of the idler. The line of curvature of the side of the tooth may also have the same shape, what determines the outer contour of the if chain link is subject specific, for example, the nominal load. While closer examination form closer to the shape of a parabola, which, however, still means that also in this case through the line segment Cree is Isny side of the tooth may be determined by touching the circle. Touching the circumference defined in this case as this line of the circle in which the distance to the line of curvature of the side of the tooth is minimal, that is, the circumference of the circle is the regression line. The distance measured at the respective radii of the osculating circle.

To achieve maximum service life of the guide roller, preferably, if it consists of hardened steel, preferably cemented to obtain a degree of flexibility and adaptability, while, on the other hand, preserving the high wear resistance.

Through a guide roller preferably passes through an axial hole through which it can stick to the shaft or axis.

Excavation for the horizontal chain links made in the form of a bath.

Excavation for the vertical chain links are limited both turned to each other the sides of the tooth and the bottom of the excavation.

The bottom of the recess may also have a curvature, and the axis of curvature is at right angles to the axis of rotation. Another possibility is to use the bottom of the recess, which is made flat and becomes attached to the sides of the tooth area to the appropriate curvature, as it was defined above.

To prevent the increased load of the chain link on the site designated welding is but excavation may contain a recess for free placement of the weld chain link.

The radius of the osculating circle to the line of curvature of the side of the tooth may be the same or greater than the radius of the contact circle of the external contour of an arc of a semicircle. The locations relative to each other should be selected so that the bottom of the excavation was part without a break on a tangent to the side of the tooth. The ratio of the two radii, again, depends on the wire diameter or the size of the chain link and may be within a factor of 1.0 and 1.2.

For better crowding of the vertical chain link on the side of the tooth and vanishing lateral side of the tooth preferably passes near the crown of the tooth to the surface of the chamfer. The chamfer surface may have a curvature or be a smooth surface. The height of the chamfer surface, measured in the radial direction of the tooth, may be preferably from 0.1 mm to 2 mm, preferably from 0.2 to 1.5 mm

The following description of the drawings is limited to describing significant aspects of the invention. It is clear that there are a number of options. On smaller, undescribed parts specialist, as usual, can learn from the drawings, complementary in this respect, the description of the figures.

The drawings depict exemplary embodiment of the subject invention, they are shown:

Figure 1. Dvuhvetvevoj chain pull, rather sketchy picture, type in Persian is active;

Figure 2. Chain link, view from above on the side of the chain link;

Figure 3. Guide roller according to the invention, in perspective view;

Figure 4. Guide roller, a view in section along the plane of symmetry of the grooves for the chain and perpendicular to the axis of rotation;

Figure 5. Interaction krupasindhu chain guide roller according to the invention in an unloaded circuit, a view in section of the guide roller perpendicular to the axis of rotation;

6. An enlarged image of the cut in figure 5;

7. An enlarged image of the cut in figure 5, another form of line curvature side of the tooth; and

Fig. Table of optimal values sizing guide roller depending on the parameters of the circuits.

Figure 1 shows as an example application of the invention dvuhvetvevoj pull chain 1 in a simplified perspective image. Chain rod 1 has an essentially rectangular housing 2 transmission mechanism to one of the end sides of which prepracovan the motor 3 in the form of an asynchronous motor. As case 2 transmission mechanism and the electric motor 3 is supplied with cooling fins, as shown in the figure. At spaced from the housing 2 transmission mechanism side to the electric motor 3 is provided by the cover 4 with the control system or main elements of the control system. is between the cover 4 of the control system and the opposite end side of the housing of the gear mechanism housing 5 chain gears, from the upper side of which are earrings 6, serving for the suspension of the traction chain 1. At the bottom of the body 5 of the chain gears out krugosvetnaya circuit 7 to the guide roller 8 that is installed with the possibility of free rotation in the housing 9 of the hook. To the lower side of the housing 9 of the hook attached to the hook 10. After changing the direction krugosvetnaya the circuit again goes up to the body 5 of the chain gears, which recorded its free end.

As you can see from the image in figure 1, in both branches krupasindhu circuit 7 is constantly acts only vertically downward force. The direction of the force does not depend on pull if suspended from the hook 10 load up or you want to prevent it from falling down. Even when a downward force acts in krupasindhu circuit 7 in the same direction and, not counting the starting movement, has the same value as when picked up.

Krugosvetnaya circuit 7 consists of many identical parts 11 of the circuit, one of which is shown as an example in figure 2 in the top view on the flat side. The link circuit 11 consists of a bent oval section 12 round wire of suitable diameter. Plot wire complicated by their butt ends and welded at the point 13. Depending on the type of bending of the chain link having two parallel plot 14 and 15, and two arcs 16 and 17 p is lucrurile. Both the arc 16 and 17 of the semicircle pass on the dotted lines 18 and 19 in the straight sections 14 and 15. The external profile of the link circuit 11 determines obecause chain link external circuit 20. Due to this form the outer contour 20 describes the plot of both arcs 16 and 17 of the semicircle, the center of which is located on the dashed line 18 or 19 and in the middle between the two straight sections 14 and 15. The centers are marked in figure 2 as 21 and 22.

Adjacent chain links, if they were linked with the displayed element 11 of the circuit, would lie perpendicular to their flat sides to the plane of the drawing.

Figure 3 and figure 4 shows the guide roller 8 at its location in the housing 9 of the hook. Through this guide roller 8, which interacts with krupasindhu circuit 7 by kinematic circuit, the force emanating from the hook 10, is applied to both branches of the circuit 7 and, accordingly, changes the direction of the chain 7. The vertical chain links are a special load, since the longitudinal force acting not on the longitudinal axis of the link circuit 11, and the point of application of force on the arcs 16, 17 of the semicircle is shifted slightly towards one of both straight sections 14 or 15.

Guide roller 8 has a base body 24 of the rolling elements in the form of a short cylinder bounded by two parallel to each other, the end surfaces 25, and one which which is visible on the image. Between the end surfaces 25 passes cylindrical surface 26 located on the perimeter. Coaxially with the surface 26 located on the perimeter, provided a through hole 27 passing through the guide roller 8 through from one end surface 25 to the other. Through holes 27 of the guide roller 8 is installed on the axis.

On the surface 26 on the outer periphery are provided one after the other, in total, four grooves 28 for the circuit, in particular for the horizontal chain links. The notches 28 in the circuit are distributed equidistant around the perimeter coaxially with a through hole 27. Their distance from each other corresponds to the distance that would have taken in the grooves 28 for the horizontal chain links 11 of the circuit when the corresponding krugosvetnaya circuit 7 is stretched, but fit without strain.

Under the horizontal links of the chain specialist understands the chain link aimed so that the flat side facing the observer in figure 2, is directed towards the axis of rotation, i.e. to the Central axis of the through hole 27.

The notches 28 in the circuit have a same shape. They have the form of baths and is limited to a flat bottom 29 of the recess, and the wall 31. The wall 31 terminates at the height of the surface 26 on the outer perimeter.

The outline of the wall 31 corresponds to the shape of the external pin is RA 20 of link 11 of the circuit. Transversely to the direction of the perimeter wall 31 forms or adjacent the end faces 32 and 33, to which a load may adjoin the corresponding link 11 of the circuit outside of the arc 16 or 17 of the semicircle.

The bottom 29 of the recess is flat, corresponding to the smooth flat side of the horizontal chain links 11 of the chain.

Due to the overlapping arrangement of parts krupasindhu chain links of the chain connecting the two horizontal chain link, must inevitably be positioned upright (vertically) - that is, the lateral surface parallel to the plane of the drawing according to figure 2, is perpendicular to the axis of rotation of the guide roller 8. To accommodate vertical links 11 of the chain guide roller 8 contains other notches 35, match the number with the slots 28 for horizontal chain links. The notches 35 for the circuit are as you can see in the figure that they overlap the slots 28 in the direction of the circumference. Abstract it is possible to make the notches 35 of passing in the direction of the perimeter groove width corresponding to the thickness of the link 11 of the chain, and from the groove on the respective radial distances are the teeth 36. Thus, the notches 35 also have the shape of almost baths and is limited by two parallel to each other with smooth side surfaces 37, only one of which you can see on the image is the situation according to Fig. 3 or 4. The distance between the side surfaces 37 a few more than the thickness of the link 11 of the chain.

The notches 35 in the circuit is limited, in addition, the bottom 38 of the recess and the two lateral sides 39 and 41 of the tooth.

According to the invention the vertical chain links must also hold or be maintained in the direction of the load.

For completeness it should also be pointed out that the bottom 28 of the recess may contain recesses 42, containing the weld seam 13. Thus, the restriction of each recess 35 for the circuit, except for the recesses 42, consists of a flat bottom 38 of the recess, smoothly transitioning into both ends in the sides 39 and 41 of the tooth. The bottom 38 of the recess forms two sides of the recess 42 direct sites, i.e. sites located on a tangent. In this case, "direct" does not necessarily mean the same as "flat". The bottom 38 of the recess may be the same as the sides 39 and 41 of the tooth, the curvature about an axis located in the plane of the drawing in figure 4. In other words, the bottom 38 of the recess may also be a hole, the radius of curvature which is slightly greater radius of curvature of the wire from which the link 11 of the chain.

Interaction krupasindhu circuit 7 with the guide roller 8 shown in figure 5.

Located perpendicular to the axis of rotation of the guide roller 8, the plane of symmetry of the grooves 28 is simultaneously the raised plane of symmetry of the grooves 35, as well as the plane of symmetry of the links 11 of the circuit, if they are located in the notches 28 or 35 for the circuit.

Figure 5 shows a view in section of the guide roller 8 along the plane of symmetry, as illustrated in figure 4. Horizontal links 11 of the circuit is also shown in cross-section on the plane of symmetry, i.e. in the plane located perpendicularly to the plane of the drawing of figure 2 and passing through the centers 21 and 22.

Figure 5 the chain is designated as the reference symbol 11 and additionally lowercase letter, so you can better distinguish them from each other. For all force has the description relating to figure 2.

As shown in figure 5, krugosvetnaya the chain goes to the right and to the left up on a tangent from the guide roller 8, and further consideration is not significant, which is a branch passes to commit, and which branch is connected with the driving chain gear; according to the invention the relationship, how they relate to the invention, symmetrical. In the position shown occurs maximum load vertical link circuit 11d. The link circuit 11d is located on top of the running of the chain.

Figure 6 shows the enlarged image of the cut to interact with the engagement between the front part of the vertical chain link, such as link circuit 11d, and the side 39 of the tooth of soedarsono 36. In the image figure 6 omitted all the parts irrelevant to the description of the terms of engagement. In addition, the ratio of values greatly exaggerated for better understanding of the essence. The incision guide roller 8 is located in the plane of symmetry being perpendicular to the axis of rotation of the idler. This is the aforementioned symmetry plane passing centrally between the two side surfaces 37 of the recess 35 for the circuit. Besides, she is also not taking into account the gap to reject, in the middle between the two parallel relative to each other by lateral surfaces of the link circuit 11d. These surfaces are defined tangent plane passing link 11d chain on both sides parallel to the plane of the drawing of figure 2 or 6. This visible section plane receiving the load side surface 39 forms a line 45 of curvature of the side of the tooth, and in opposition to the path or line 20 of the external circuit directly in the direction of the perimeter (again, not given clearance for deviations).

Line 45 of curvature of the side of the tooth is an arc of a circle, reaching peaks of the adjacent tooth 36 and the incoming tangent to the bottom 38 of the recess. The centre of this circle, the defining line 45 of curvature of the side of the tooth, is located at the point 46, that is, the center 46 is slightly shifted relative price is tra 21 in the load direction parallel to the bottom 38 of the recess. The degree of offset, i.e. the distance between the two centers 21 and 46 depends on the sizing link circuit 11. The following table on Fig indicated the optimal value for the distance a centers depending on the sizing link circuit 11. The diameter of the circle that describes the line of curvature of the side of the tooth, has the same diameter as the arc 16, 17 of the semicircle.

The side 41 of the tooth attached to the same form, which to show the line of curvature of the side of the tooth using the same reference symbol 45. Line 45 of curvature of the side of the tooth side 41 of the tooth of the opposite tooth 36 is an arc of a circle defining the center 47. Center 47 is from the center 22 the same distance as the distance between the centers 21 and 46, if the link circuit 11d is located in the center between the segments 11c and 11e chain.

When determining this distance a is based on the fact that we are talking about not the former operation krupasindhu chain, no phenomena of wear. It lies freely on the guide roller 8, that is, the horizontal parts 11c and 11e circuit are symmetrical in their grooves 28. Vertical link circuit 11d is also embedded symmetrically between them, so that thereby retaining the position of the center 21 as a curvature center line 20 of the external circuit.

As follows from the table is s, wedge, due to the resulting displacement of the centers of the two respectively adjacent circles, very small. In the end, it is designed so that when the load circuit rated load in the position shown in figure 5, located at the top of the vertical link 11d chain is extended in length located in the plane of the links 11c and 11e chain with simultaneous elastic deformation. Due to this deformation of the vertical link circuit 11d adjacent its front part, in particular the element of the arc of the semicircle, aimed in the direction of the load, to the side 39 of the tooth. That is, since this load comes from the horizontal chain link 11th force is additionally passed through a guide roller on the horizontal chain link 11c. The base body 24 of the roller guide roller 8 is in some way bypass (bypass) relative to the link 11d chain.

It is established that by means of this configuration are the same as for the circuit to operate the circuit with a higher load values. Allowable safe load increases to 25% relative to other rated load.

In addition, it was found that this new guide roller has a higher reliability and less prone to wear.

In the preceding description, assume that the chain 8 is round the venous circuit, performed, as has been explained, the individual links of the chain from a piece of round wire. In accordance with this preferred if the sides 39 and 41 of the tooth is curved along two axes. This means, on the one hand that they are curved in accordance with the touching circle, and on the other hand, forming the receiving load surfaces of the side walls 39 and 41 of the tooth is an arc of a circle, with diameter slightly larger than the wire diameter, which are made krugosvetnaya chain. Consequently, the reduced pressure on the surface.

Logically the same thing can happen on the area of the bottom of the excavation.

To increase the load link chain tend to use for making chain links of the core wire instead of round wire. Core wire consists of a plot arc and a fragment of a square. Or, put differently, we are talking about a square cross-section, in which on one side adjacent to each other with corners replaced by a quarter circle.

Even for this type of circuits you can use the proposed design takes the load side 39 of the tooth. Receiving the load surface 39 in this case is not curved along two axes, as discussed above in relation to krupasindhu circuit, and the forming surface is a straight line drawn VD the eh line of curvature of the side of the tooth parallel to the axis of rotation.

Finally, it is possible to use as a guide roller raw steel of sufficient strength not affected by additional heat treatment. This significantly reduces costs.

Illustrated guide roller provided with holes for mounting on the axle. Also possible implementation guide roller onto a solid shaft. Depending on the situation, it may be advantageous if the radius line 45 of curvature of the side of the tooth is more radius line 20 in the external circuit. The Central 46 or 47 is additionally biased in this case up as shown in the drawing. The degree of offset ensures that the line 45 of curvature of the side of the tooth is tangent to the bottom 38 of the recess.

7 shows another exemplary embodiment of the invention. The necessary distance between the center line 20 of the outer contour of the link circuit 11d and the adjacent lateral face 39 or 41 tooth reach in this case is not offset by touching circles, as in the example above, the execution according to Fig.6. In this case, the distance obtained when determining line 45 of curvature of the side of the tooth contact of a circle, the radius of which is, for example, according to table 8, is increased in comparison with the radius line 20 external contour plot arc of the semicircle.

Because the plot vyamk is 35 for the circuit should avoid places of a break, which otherwise could cause dents on the outer side of the link circuit 11, the center 46 on the dividing straight line 19 or 18 is shifted in the direction from the bottom 38 of the recess. As a result, the bottom 38 of the recess is its direct plot directly on a tangent to the line 45 of curvature of the side of the tooth, without buckling. Thus the centers 21 and 46 are located on the dividing straight line 19, which separates the arc 17 of the semicircle from the straight sections 14, 15, while the center 47 of curvature is located on the dividing straight 18 separating the straight sections 14, 15 from the arc 16 of the semicircle. The distance between the centers of 21, 46 22, 47 from each other corresponds to the difference of the radii.

In the rest of the interaction corresponds described in detail above.

Finally, it is further possible to calculate the line of curvature of the side of the tooth, not as a segment of an arc of a circle, and give it the form that is taken on this plot line 20 external circuit under load. Also in this case, you can define contiguous circumferentially offset relative to each other, according to Fig.6 and above the table, as for the line 45 of curvature of the side of the tooth, and line 20 of the external circuit. These touching circles represent curves approximation, defined, for example, through the underhis kind of regression analysis from the point of view of the smallest quadratic error. When this distance measurement and fit to touching the circumference happen on the basis of the radius, respectively, existing in the mind of the circle. The table is designed and tested for mechanical stresses 160 N/mm2.

The height of each tooth 36 varies in the stress field between the good sliding properties of the chain 8 and the maximization of the path of rotation along which force is transmitted between the guide roller and vertical chain link. The optimal value of the height of the tooth 36 are from 0.16 to 0.75 from the thickness of the wire from which made the link circuit 10. Height is measured as the distance between the plane and the apex of the tooth. The main plane is the tangent plane to the lower side surface of the horizontal chain link, which acts through the tooth 36.

Conditions of crowding and convergence can be improved if the tooth 36 provided with a chamfer at its top tooth. The height or width of the chamfer is in the range between 0.1 and 1.5 mm

Guide roller for zinevych circuits, for example kruglozernyh chains or chains of structural steel has circumferential grooves for horizontal chain links. Additionally, there are notches for the circuit for the vertical chain links. Excavation for the circuit for the vertical chain links are separated from each other by teeth. The lateral surface of the lateral sides of the tooth of the teeth, to the which adjoins the vertical chain link under the action of load, designed and profiled in a special way. Calculated in such a way that up to a certain load circuit of the vertical chain link is not adjacent its front part to the side of the tooth. The contact between the side surface of the tooth and the front part of the respective vertical chain link occurs only above a certain load chain.

1. Guide roller (8) for changing the direction zinevych chains (7), such as kruglozerny chain or chains of structural steel in particular, chain rod (1), and each link (11) chains made of bent wire and has a flat shape consisting of two parallel sections (14, 15) and two arcs (16, 17) of the semicircle, with the base body (24) rolling with the surface (26) on the outer periphery and the axis of rotation, the grooves (28) for the circuit made on the surface (26) on the outer periphery with the possibility of placing horizontal links (11) circuit and is transmitted from the guide roller (8) on the horizontal links (11) circuit, with the slots (35) of the circuit is made on the surface (26) on the outer periphery of the opportunity of placing a vertical links (11) chain, the number of which corresponds to the number of grooves (28) for horizontal links (11) chains, each of which has a reference plots (38) for the vertical chain links made with the option of leaning on the appropriate link (11) chain, at least one adjacent to the arc (16, 17) of the circle part of his direct area (14, 15), and each one of them is located between adjacent grooves (28) for horizontal links (11) chain with the intersection of the grooves (28), and
with teeth (36), each one located between two adjacent grooves (35) for vertical links (11) circuit configured to accommodate vertical link (11) circuit, and each of which is limited by two lateral sides (39, 41) of a tooth directed toward the circumference,
each of both lateral bounding the recess (35) of the parties (39, 41) of the neighboring teeth (36) defines a line (45) curvature side of the tooth in which is located perpendicularly to the axis of rotation of the plane of symmetry of the grooves (35) for vertical links (11) of the circuit corresponding to at least approximate a curved shape, which has an external circuit (20) adjacent aimed in the direction of the load arc (16, 17) of the semicircle of the vertical link (11) of the circuit located in a corresponding recess (35) for the circuit, and
moreover, the position of both sides (39, 41) of the tooth is designed in such a way that their line (45) curvature side of the tooth, measured in the plane of symmetry is at least near the top of the tooth length directed in the direction of the load in the external circuit 20) arc (16, 17) of the semicircle of the vertical link (11) of the circuit located in a corresponding recess (35) for the circuit, if both adjacent horizontal link (11) chain centered and positioned in their respective grooves (28) for the circuit without the influence of external forces, and between the links (11) chain no freeplay.

2. Guide roller according to claim 1, characterized in that the teeth (36) has a height above the surface defined adjacent to the axis of rotation of the side surfaces of the horizontal link (11) of the circuit component from 0.16 to 0.75 on the thickness of the chain link.

3. Guide roller according to claim 1, characterized in that the side wall (38, 41) of the tooth has a curvature along the two axes.

4. Guide roller according to claim 3, characterized in that the curvature has a radius that is not less than half the diameter of the wire from which made the link (11) chain.

5. Guide roller according to claim 1, characterized in that the outer contour (20) arc (16, 17) of the semicircle attached to the guide roller (8) vertical link (11) circuit determines at least approximately in contact circle link chain with center (21, 22), and line (45) of curvature of the side wall (39, 41) of the tooth determines touching the circumference of the side wall of the tooth with the center (46, 47), and the center (46, 47) each touching the circumference of the side wall of the tooth is displaced in the direction of the load relative to C is NTRA (21, 22) adjacent to the contact circumference of the chain link from the point of view of the link (11) chain.

6. Guide roller according to claim 5, characterized in that the offset sent in the direction of the load.

7. Guide roller according to claim 5, characterized in that the direct connection between the two neighboring centers (21, 46; 22, 47) runs parallel to straight sections (14, 15) of the vertical link (11) chain.

8. Guide roller according to claim 5, characterized in that the direct connection between the two neighboring centers (21, 46; 22, 47) is held at an acute angle to the longitudinal axes of the straight sections (14, 15) of the vertical chain link.

9. Guide roller according to claim 5, characterized in that the direct connection between the two neighboring centers (21, 46; 22, 47) is held at right angles to the longitudinal axes of the straight sections (14, 15) of the vertical chain link.

10. Guide roller according to claim 5, characterized in that the distance between the centers (21, 46; 22, 47) of contiguous circles is from 0.06 to 0.1, preferably from 0,082 to 0,096 the diameter of the wire link (11) chain.

11. Guide roller according to claim 1, characterized in that the line (45) curvature side of the tooth has exactly circular in shape.

12. Guide roller according to claim 1, characterized in that the line (45) curvature side of the tooth has the same shape as the outer contour (20) of the respective side surfaces (39, 41) of the tooth adjacent the arc (16, 17) of the semicircle of the link (11) chain loaded with rated load.

13. Guide roller according to claim 1, characterized in that it is made from hardened, preferably cemented or raw steel.

14. Guide roller according to claim 1, characterized in that it contains an axial hole (27), whereby the roller onto the shaft or axis.

15. Guide roller according to claim 1, characterized in that the recess (28) for horizontal links (11) chain is made in the form of a bath.

16. Guide roller according to claim 1, characterized in that the recess (28) for vertical links (11) of the circuit is defined by the two directed in the direction of or toward the perimeter of the lateral sides (39, 41) of the tooth and the bottom (38) of the notch.

17. Guide roller according to item 16, characterized in that the bottom (38) of the recess has a curvature, and the axis of curvature is at right angles to the axis of rotation.

18. Guide roller according to item 16, characterized in that the bottom (38) of the recess is flat.

19. Guide roller according to item 16, characterized in that the bottom (38) of the recess is in the middle of the recess (42) for free location of the weld seam (13) of the link (11) chain.

20. Guide roller according to claim 1, characterized in that the radius of the osculating circle line (45) curvature side of the tooth more than the radius of the contact circle of the external circuit (20) arc (16, 17) of the semicircle.

21. On rawsome roller according to claim 20, characterized in that the ratio of radii is from 1.0 to 1.2.

22. Guide roller according to claim 20, characterized in that the ratio of radii ranging from 0.08 to 0.3 of the diameter of the wire.

23. Guide roller according to claim 1, characterized in that the side wall (39, 41) of the tooth moves in the direction of the tooth tip to the surface of the chamfer.

24. Guide roller according to item 23, wherein the height of the surface of the chamfer is depending on the diameter of the wire of the chain link from 0.1 to 1.5 mm.

25. Guide roller according to claim 1, characterized in that the guide roller (8) is made as a single unit trunnion axis.

26. Guide roller according to claim 1, characterized in that the teeth (36) have on the site, radially extending above the bottom (38) of the recess to the horizontal link (10) chain width that is only slightly less than the distance to the clearance between the straight sections (14, 15) of the link (10) of the chain.

27. Guide roller according to claim 1, characterized in that at a given load voltage more than 0 N/mm2, preferably between 100% and 75% of the nominal voltage level (8) chain disappears distance between a line (45) of curvature of the side wall of the tooth and the external circuit (20) arc (16, 17) of the semicircle.

28. Guide roller according to item 27, wherein the rated voltage range from 320 to 80 N/mm2preferably from 200 to 100 N/mm2 .

29. Guide roller according to item 27, characterized in that the rated voltage is calculated from the nominal allowable load chain transfer without consideration of the dynamic component and the cross-section of the wire of the chain link.



 

Same patents:

FIELD: transport.

SUBSTANCE: invention relates to chain wheel for chain drives with rotation axis D and two chain link boxes 20, 30 arranged along chain wheel edges nearby each other and sifted relative two each other that cross chain wheel in inclined position. Each box 20, 30 has lateral wall and opposite wall, and webs 31, 21 arranged along circumference. To simplify producing chain wheel for inclined chain links and improve force distribution, this invention proposes make box lateral and opposite walls form support surfaces inclined to rotation axis D and run to box base section.

EFFECT: simplified design, better distribution of forces at chain loading bearing links.

19 cl, 13 dwg

FIELD: transport.

SUBSTANCE: invention relates to rotary device for chain drive or rotary device for extraction or transportation devices incorporating chain traction. Rotary device for chain and chain wheel incorporated therewith are proposed. Note here that lateral surfaces of bends in chain belt horizontal links are lower, in every case, than equatorial line, and that they represent concaved recess, while receiving horizontal recesses of chain wheel have their lateral surfaces of teeth made barrel-like protruded to mate concaved lateral surfaces of aforesaid bends.

EFFECT: reduced specific compression force between to parts.

22 cl, 10 dwg

FIELD: engineering industry.

SUBSTANCE: sprocket for chain gears includes hub and gear rim with even number of teeth and symmetric profile. Profile of working surfaces of each teeth of sprocket, which is located between two standard teeth, is made along internal equidistant line.

EFFECT: increasing life time of chain and sprockets.

3 dwg

Chain gear // 2375618

FIELD: machine building.

SUBSTANCE: invention refers to general machine building and can be implemented in any of its branches where mechanic gears of rotary motion are used. The chain gear consists of two or more wheels-gears connected with chain (3). The gear corresponds to a unit wherein gear rim (K) consists of a set of separate sector parts connected with disk (4) of a gear with fit ring (6). Connections of gear rim (K) with disk (4) and fit ring (6) contain a system of slots and lugs facilitating adjustment of diametre of initial circumference of the gear and consequently its step bringing it to correspondence with the step of the chain by its wear. Adjustment is carried out with angular turn of the disk relative to the fit ring with tap wrench (8) with gear.

EFFECT: increased operation life of chain, reduced cost for spare chains for facilitation of required resource of chain gear.

6 dwg

FIELD: transport engineering.

SUBSTANCE: proposed motorcycles suspension system contains first sprocket including hub with cross slot on outer surface and ring engaging with hub and provided with surface for engaging with belt, and stop member engaging with hub to hold ring on hub. Ring is made with profile and projection on inner surface for relative engagement with slot. Sprocket is connected to wheel. Ring is made of polymeric material. Motorcycle suspension system contains also frame member, hinged lever connected to frame member in point of turning, said ring being connected by axle to hinged lever, and shock absorbing member arranged to connected hinged lever and frame, and second sprocket installed for engagement with first sprocket. Sprocket of motorcycle suspension system has hub, ring engaged with hub through adhesive material. Ring has profile on outer surface for engagement with belt and radially directed projection passing crosswisely on inner surface of ring. Inner diameter of ring is smaller than outer diameter of hub. Hub is provided with slot for engagement with projection. Ring is made of polyurethane.

EFFECT: prevention of rotation between hub and detachable working surface.

5 cl, 10 dwg

FIELD: mining industry.

SUBSTANCE: invention relates to chain wheel for underground mining, particularly, to chain scraper conveyor with chain drive. Proposed chain wheel with first rim consisting of first tooth elements uniformly spaced over perimeter of chain wheel body and at least one second rim axially displaced relative to first rim and consisting of other tooth elements uniformly distributed over perimeter. Sides of tooth elements pointed to each other are provided with cavities which serve as contact surfaces of lying links of chain. Contact surfaces in cavities of each tooth element consist of wear lining made of wear-resistant material.

EFFECT: increased service life of chain wheels.

26 cl, 10 dwg

Flexible sprocket // 2266450

FIELD: mechanical engineering.

SUBSTANCE: flexible sprocket comprises hub, rim, and flexible members that connects them and arranged over the periphery of the sprocket. The rim and hub have conical-cylindrical openings arranged concentrically over the periphery parallel to the axis of the sprocket. The conical parts of the openings face internal sides of the rim and the hub. The flexible members are made of flexible cylindrical rods and arranged in the conical-cylindrical openings of the hub and rim. The space between the hub and rim allows the flexible rods to be flexibly bent and the rim to be self-adjustable in the plane of the gearing.

EFFECT: prolonged durability.

1 dwg

FIELD: mechanical engineering.

SUBSTANCE: sprocket comprises asymmetrically shaped teeth. The working and back sides of each tooth of the sprocket has different evolvent shape.

EFFECT: enhanced durability.

2 dwg

The invention relates to mechanical engineering, in particular to a closed high-speed chain drive roller and gear chains

The invention relates to mechanical engineering and can be used in chain transmission construction, road, agricultural, etc

FIELD: mechanical engineering.

SUBSTANCE: sprocket comprises asymmetrically shaped teeth. The working and back sides of each tooth of the sprocket has different evolvent shape.

EFFECT: enhanced durability.

2 dwg

Flexible sprocket // 2266450

FIELD: mechanical engineering.

SUBSTANCE: flexible sprocket comprises hub, rim, and flexible members that connects them and arranged over the periphery of the sprocket. The rim and hub have conical-cylindrical openings arranged concentrically over the periphery parallel to the axis of the sprocket. The conical parts of the openings face internal sides of the rim and the hub. The flexible members are made of flexible cylindrical rods and arranged in the conical-cylindrical openings of the hub and rim. The space between the hub and rim allows the flexible rods to be flexibly bent and the rim to be self-adjustable in the plane of the gearing.

EFFECT: prolonged durability.

1 dwg

FIELD: mining industry.

SUBSTANCE: invention relates to chain wheel for underground mining, particularly, to chain scraper conveyor with chain drive. Proposed chain wheel with first rim consisting of first tooth elements uniformly spaced over perimeter of chain wheel body and at least one second rim axially displaced relative to first rim and consisting of other tooth elements uniformly distributed over perimeter. Sides of tooth elements pointed to each other are provided with cavities which serve as contact surfaces of lying links of chain. Contact surfaces in cavities of each tooth element consist of wear lining made of wear-resistant material.

EFFECT: increased service life of chain wheels.

26 cl, 10 dwg

FIELD: transport engineering.

SUBSTANCE: proposed motorcycles suspension system contains first sprocket including hub with cross slot on outer surface and ring engaging with hub and provided with surface for engaging with belt, and stop member engaging with hub to hold ring on hub. Ring is made with profile and projection on inner surface for relative engagement with slot. Sprocket is connected to wheel. Ring is made of polymeric material. Motorcycle suspension system contains also frame member, hinged lever connected to frame member in point of turning, said ring being connected by axle to hinged lever, and shock absorbing member arranged to connected hinged lever and frame, and second sprocket installed for engagement with first sprocket. Sprocket of motorcycle suspension system has hub, ring engaged with hub through adhesive material. Ring has profile on outer surface for engagement with belt and radially directed projection passing crosswisely on inner surface of ring. Inner diameter of ring is smaller than outer diameter of hub. Hub is provided with slot for engagement with projection. Ring is made of polyurethane.

EFFECT: prevention of rotation between hub and detachable working surface.

5 cl, 10 dwg

Chain gear // 2375618

FIELD: machine building.

SUBSTANCE: invention refers to general machine building and can be implemented in any of its branches where mechanic gears of rotary motion are used. The chain gear consists of two or more wheels-gears connected with chain (3). The gear corresponds to a unit wherein gear rim (K) consists of a set of separate sector parts connected with disk (4) of a gear with fit ring (6). Connections of gear rim (K) with disk (4) and fit ring (6) contain a system of slots and lugs facilitating adjustment of diametre of initial circumference of the gear and consequently its step bringing it to correspondence with the step of the chain by its wear. Adjustment is carried out with angular turn of the disk relative to the fit ring with tap wrench (8) with gear.

EFFECT: increased operation life of chain, reduced cost for spare chains for facilitation of required resource of chain gear.

6 dwg

FIELD: engineering industry.

SUBSTANCE: sprocket for chain gears includes hub and gear rim with even number of teeth and symmetric profile. Profile of working surfaces of each teeth of sprocket, which is located between two standard teeth, is made along internal equidistant line.

EFFECT: increasing life time of chain and sprockets.

3 dwg

FIELD: transport.

SUBSTANCE: invention relates to rotary device for chain drive or rotary device for extraction or transportation devices incorporating chain traction. Rotary device for chain and chain wheel incorporated therewith are proposed. Note here that lateral surfaces of bends in chain belt horizontal links are lower, in every case, than equatorial line, and that they represent concaved recess, while receiving horizontal recesses of chain wheel have their lateral surfaces of teeth made barrel-like protruded to mate concaved lateral surfaces of aforesaid bends.

EFFECT: reduced specific compression force between to parts.

22 cl, 10 dwg

FIELD: transport.

SUBSTANCE: invention relates to chain wheel for chain drives with rotation axis D and two chain link boxes 20, 30 arranged along chain wheel edges nearby each other and sifted relative two each other that cross chain wheel in inclined position. Each box 20, 30 has lateral wall and opposite wall, and webs 31, 21 arranged along circumference. To simplify producing chain wheel for inclined chain links and improve force distribution, this invention proposes make box lateral and opposite walls form support surfaces inclined to rotation axis D and run to box base section.

EFFECT: simplified design, better distribution of forces at chain loading bearing links.

19 cl, 13 dwg

FIELD: machine building.

SUBSTANCE: guiding roller (8) for link chains, for example, for round-link chains or chains out of profile steel, has recesses (28) along perimetre for horizontal links of chains and recesses (35) for vertical links of chains. Recesses (35) for vertical links of the chains are separated from each other with teeth (36). Sides (39, 41) of teeth (36), where a vertical link of the chain adjoins under load, are calculated and profiled by a special procedure. The calculation ensures a gap between the vertical link of the chain with its front part and the side surface of the tooth untill the chain is loaded to a specified load. Side surface of the tooth and front part of the corresponding vertical link of the chain contact only after specified load onto the chain.

EFFECT: raised efficiency of chain.

29 cl, 7 dwg, 1 tbl

FIELD: transport.

SUBSTANCE: sprocket (23) has outer circular surface (26) and fulcrum pin, recesses for chain horizontal links and recesses for chain vertical links. Recesses for chain vertical links are separated by teeth 36. Side face 39 of tooth in contact with loaded chain vertical link features special profile and sizes. Chain sizes are selected so that vertical link does not come in contact with tooth side face by its front part unless definite load is applied on the chain. Contact between tooth side face and front part of chain appropriate link occurs only definite load is exceeded.

EFFECT: sprocket that allows increased load on chain links.

29 cl, 7 dwg, 1 tbl

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