Self-aligning roller bearing retainer and self-aligning roller bearing

Abstract

According to the self-aligning roller bearing retainer and the self-aligning roller bearing, a window hole is formed in a retainer body, the two first side walls, in the axial direction of the retainer body, of the window hole are both arc-shaped faces, and the arc-shaped faces protrude in the direction away from the window hole along the middle position in the axial direction of the retainer body; a supporting point protruding out of the arc-shaped surface is arranged at the middle position, in the axial direction of the retainer body, of the arc-shaped surface, and the supporting points of the two first side walls of the window hole form two-point support for supporting a roller; the supporting points are cambered surfaces capable of being attached to the rollers, and the supporting points of the two first side walls are symmetrically arranged relative to the window hole. The supporting points are arranged on the two opposite first side walls of the window hole, so that two-point supporting is formed in the circumferential direction of the window hole, and the roller is in two-point supporting contact with the window hole of the retainer main body, so that the contact area of the retainer main body and the roller is reduced, the friction force between the roller and the retainer main body is reduced, the abrasion of the roller is reduced, and the service life of the roller is prolonged. And the dimensional precision requirement of the bearing is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing processing, and particularly relates to a spherical roller bearing cage and a spherical roller bearing. Background Technique

[0002] Rolling bearings are important components in contemporary mechanical equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient during the movement of the mechanical rotating body, and ensure the rotational accuracy of the mechanical rotating body. It is called the joint of the machine and is widely used in various types of machinery.

[0003] Spherical roller bearings have self-aligning performance and are not easily affected by the angular error between the shaft and the bearing housing seat or the shaft bending. They are suitable for occasions where installation errors or shaft deflections cause angular errors. Spherical roller bearings include double-row roller bearings and single-row roller bearings. Among them, the single-row spherical roller bearing includes four components: an inner ring, an outer ring, rolling elements, and a cage. Among them, the function of the inner ring is to cooperate with the shaft and rotate with the shaft; the function of the outer ring is to cooperate with the bearing housing and play a supporting role; the rolling elements are evenly distributed between the inner ring and the outer ring by means of the cage, and their shape, size, and quantity directly affect the service performance and life of the rolling bearing; the cage plays a role of isolating the rolling elements and guiding their movement in the rolling bearing. The cage is inclined at an angle relative to the bearing axis, giving it self-aligning performance.

[0004] During the operation of the bearing, when the bearing bears heavy loads or impact loads, the rollers will come into contact with the side surface of the ball pocket of the cage. At present, the rollers are in full contact with the side surface of the ball pocket, which easily leads to a large frictional force between the rollers and the side surface of the ball pocket.

[0005] Therefore, how to provide a spherical roller bearing cage to reduce the frictional force between the rollers and the cage is a technical problem that those skilled in the art urgently need to solve. Content of the Utility Model

[0006] In view of this, the utility model provides a spherical roller bearing cage to reduce the frictional force between the rollers and the cage. In addition, the utility model also provides a spherical roller bearing with the above spherical roller bearing cage.

[0007] To achieve the above object, the utility model provides the following technical solutions:

[0008] A spherical roller bearing cage, comprising:

[0009] Cage body, the cage body is a circular ring structure, and a plurality of window holes for placing rollers are arranged circumferentially on the cage body. The two first side walls of the window hole opposite to each other along the axial direction of the cage body are both arc-shaped surfaces, and the middle position of the arc-shaped surface along the axial direction of the cage body protrudes away from the window hole;

[0010] A support point protruding from the arc-shaped surface is arranged at the middle position of the arc-shaped surface along the axial direction of the cage body. The support points of the two first side walls of the window hole form a two-point support for supporting the roller;

[0011] The support point is an arc surface that can fit with the roller. The support points of the two first side walls are symmetrically arranged with respect to the window hole, and the dimension of the support point along the axial direction of the cage body is 1 / 6 - 1 / 5 of the dimension of the arc-shaped surface along the axial direction of the cage body.

[0012] Preferably, in the above-mentioned spherical roller bearing cage, oil storage holes are arranged on both second side walls of the window hole along the circumferential direction of the cage body.

[0013] Preferably, in the above-mentioned spherical roller bearing cage, the oil storage hole is opened at the position where the second side wall intersects with the first side wall.

[0014] Preferably, in the above-mentioned spherical roller bearing cage, the oil storage hole is an arc-shaped groove opened at a position where the second side wall is close to the first side wall. The notch of the arc-shaped groove faces the window hole, and the arc-shaped groove is a through groove penetrating the thickness of the second side wall;

[0015] And / or,

[0016] Four of the oil storage holes are arranged circumferentially around the window hole.

[0017] Preferably, in the above-mentioned spherical roller bearing cage, the cage body includes:

[0018] A first side ring, the first side ring is a circular ring;

[0019] A second side ring, the second side ring is a circular ring, and the diameter of the first side ring is smaller than the diameter of the second side ring. The first side ring and the second side ring are arranged axially;

[0020] Connecting beams, the connecting beams are arranged along the axial direction of the cage body and connect the first side ring and the second side ring. Windows are formed between adjacent connecting beams, and the side walls of the connecting beams are the arc-shaped surfaces.

[0021] Preferably, in the above-mentioned centering roller bearing cage, the thickness of the support point in the radial direction of the cage body is the same as the thickness of the connecting beam in the radial direction of the cage body.

[0022] Preferably, in the above-mentioned centering roller bearing cage, the pressing slope angle of the window hole is 45°-52°.

[0023] Preferably, in the above-mentioned centering roller bearing cage, the first side ring and / or the second side ring has a groove for placing a detection device.

[0024] Preferably, in the above-mentioned centering roller bearing cage, the first side ring extends in the direction towards the center of the cage body;

[0025] The second side ring extends in the direction away from the center of the cage body. The connecting beam is connected to one side of the first side ring close to the second side ring and one side of the second side ring close to the first side ring, and the groove is opened on one side of the first side ring close to the second side ring.

[0026] A centering roller bearing includes the centering roller bearing cage described in any one of the above.

[0027] In the embodiment of the present utility model, a centering roller bearing cage is disclosed. By arranging support points on both opposite first side walls of the window hole of the centering roller bearing cage, two-point support is formed in the circumferential direction of the window hole. The roller installed in this window hole can contact the two support points to realize the support of the roller. The roller and the window hole of the cage body adopt two-point support contact, thereby reducing the contact area between the cage body and the roller, reducing the friction between the roller and the cage body, being beneficial to reducing the wear of the roller, and ensuring the requirement of the bearing size accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 It is a schematic structural diagram of a centering roller bearing cage and a roller disclosed in the prior art;

[0030] Figure 2 It is a schematic structural diagram of the centering roller bearing cage disclosed in the embodiment of the present utility model;

[0031] Figure 3This is the front view of the cage of the self-aligning roller bearing disclosed in the embodiment of the present utility model;

[0032] Figure 4 It is Figure 3 the partial enlarged view of A in

[0033] Figure 5 This is the partial structural schematic diagram of the cage of the self-aligning roller bearing disclosed in the embodiment of the present utility model;

[0034] Figure 6 This is the top view of the cage of the self-aligning roller bearing disclosed in the embodiment of the present utility model;

[0035] Figure 7 It is Figure 6 the partial enlarged view of B-B in

[0036] Figure 8 This is the specific structural schematic diagram of the cage of the self-aligning roller bearing disclosed in the embodiment of the present utility model. Detailed implementation manners

[0037] The present utility model discloses a cage of a self-aligning roller bearing to reduce the frictional force between the rollers and the cage. In addition, the present utility model also discloses a self-aligning roller bearing having the above-mentioned cage of the self-aligning roller bearing.

[0038] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0039] Hereinafter, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0040] The spherical roller bearing has self-aligning performance and is not easily affected by the angular error between the shaft and the bearing housing seat or the shaft bending. It is suitable for occasions where angular errors are caused by installation errors or shaft deflection. The spherical roller bearing includes a double-row roller bearing and a single-row roller bearing. Among them, the single-row self-aligning roller bearing includes four components: an inner ring, an outer ring, rolling elements, and a cage. Among them, the function of the inner ring is to cooperate with the shaft and rotate with the shaft; the function of the outer ring is to cooperate with the bearing housing and play a supporting role; the rolling elements are evenly distributed between the inner ring and the outer ring by means of the cage, and their shape, size, and quantity directly affect the service performance and life of the rolling bearing; the cage plays a role of isolating the rolling elements and guiding their movement in the rolling bearing. The cage is inclined at an angle relative to the bearing axis, giving it self-aligning performance.

[0041] As Figure 1 shown, during the operation of the bearing, when the bearing bears heavy loads or impact loads, the roller 200 will come into contact with the side surface of the ball pocket of the cage 100. At present, the roller 200 is in full contact with the side surface of the ball pocket, which easily leads to a large frictional force between the roller 200 and the side surface of the ball pocket.

[0042] As Figures 2 to 5 shown, the spherical roller bearing cage includes a cage body 1. The cage body 1 is of a circular ring structure. The cage body 1 is circumferentially provided with a plurality of window holes 14 for placing rollers. The two opposite first side walls of the window holes 14 along the axial direction of the cage body 1 are both arc-shaped surfaces, and the middle position of the arc-shaped surface along the axial direction of the cage body 1 protrudes away from the window hole 14; specifically,

[0043] a support point 131 protruding from the arc-shaped surface is provided at the middle position of the arc-shaped surface along the axial direction of the cage body 1. The support points 131 on the two first side walls of the window hole 14 form a two-point support for supporting the roller; the support point 131 is an arc surface that can fit with the roller. The support points 131 on the two first side walls are symmetrically arranged with respect to the window hole, and the dimension of the support point 131 along the axial direction of the cage body 1 is 1 / 6 - 1 / 5 of the dimension of the arc-shaped surface along the axial direction of the cage body 1.

[0044] In this application, by providing support points 131 on both opposite first side walls of the window hole 14 of the spherical roller bearing cage, a two-point support is formed in the circumferential direction of the window hole 14. The roller installed in the window hole 14 can come into contact with the two support points 131 to realize the support of the roller. The roller and the window hole 14 of the cage body 1 adopt two-point support contact, thereby reducing the contact area between the cage body 1 and the roller, thereby reducing the frictional force between the roller and the cage body 1, which is beneficial to reducing the wear of the roller and ensuring the requirement of the bearing size accuracy.

[0045] In some embodiments, oil storage holes 132 are provided on both of the two second side walls of the window hole 14 along the circumferential direction of the cage body 1. It should be noted that, in combination with Figure 4 as shown, the first side wall of the window hole 14 in the present application is Figure 4 the two vertical side walls in Figure 4 and the second side walls are the two horizontal side walls in

[0046] By providing the oil storage holes 132 on the second side walls, lubricating fluid can be temporarily stored in the oil storage holes 132 to achieve lubrication of the rollers. By providing the oil storage holes 132 on both of the two second side walls, lubricating oil can be provided to both sides of the rollers, which is beneficial to improving the lubrication effect of the rollers, further reducing the friction between the rollers and the window hole 14 of the cage body 1, alleviating the wear of the rollers and the cage body 1, and thus prolonging the service life of the bearing.

[0047] In some embodiments, the oil storage holes 132 are opened at the positions where the second side walls intersect with the first side walls to lubricate the apex angles of the rollers and improve the lubrication effect. In some embodiments, the window hole 14 is of a quadrilateral structure, and the oil storage holes 132 are provided at all four intersecting positions of the first side walls and the second side walls. It should be noted that the number of the oil storage holes 132 can be set according to different needs and is within the protection scope.

[0048] In combination with Figure 4 as shown, in some embodiments, the oil storage holes 132 are arc-shaped grooves opened at positions on the second side walls close to the first side walls. The openings of the arc-shaped grooves face the window hole 14, and the arc-shaped grooves are through grooves penetrating the thickness (radial dimension) of the second side walls. By setting the oil storage holes 132 as arc-shaped surfaces and the openings of the arc-shaped grooves facing the window hole 14, the lubricating oil in the arc-shaped grooves can contact the rollers to lubricate the rollers. It should be noted that the shapes and sizes of the oil storage holes 132 in the present application can be set according to different needs and are within the protection scope.

[0049] Combined with the above description, arc-shaped grooves are provided at both ends of the second side walls, so that the second side walls form a structure similar to an "m" shape, achieving lubrication of the rollers while ensuring strength. The second side walls forming a structure similar to an "m" shape is convenient for processing and can increase the overall strength of the oil storage holes 132, avoiding the risk of cracking.

[0050] In some embodiments, the cage body 1 includes: a first side ring 11, a second side ring 12, and a connecting beam 13.

[0051] Among them, the first side ring 11 is a circular ring, and the size of the first side ring 11 can be set according to different needs and is within the protection scope. The second side ring 12 is a circular ring, and the diameter of the first side ring 11 is smaller than that of the second side ring 12. The first side ring 11 and the second side ring 12 are arranged axially; the connecting beam 13 is arranged along the axis of the cage body 1 and connects the first side ring 11 and the second side ring 12. Window holes 14 are formed between adjacent connecting beams 13, and the side wall of the connecting beam 13 is an arc surface.

[0052] The first side ring 11, the second side ring 12 and the connecting beam 13 in this application are of an integrally formed structure. Specifically, window holes 14 can be punched out on a circular belt so that connecting beams 13 are formed between the window holes 14. The shape and size of the cage body 1 are not specifically limited here and are within the protection scope.

[0053] In some embodiments, the thickness of the support point 131 in the radial direction of the cage body 1 is the same as the thickness of the connecting beam 13 in the radial direction of the cage body 1. The shape of the support point 131 can be an arc-shaped protrusion that fits the roller or a convex point that is in point contact with the roller. The shape and size of the support point 131 can be set according to different needs and are within the protection scope.

[0054] In some embodiments, the pressing slope angle of the window hole 14 is 45° - 52°, which is beneficial to preventing the roller from being scratched. The two-point contact design of the window hole 14 of the cage body 1 can increase the support points between the roller and the cage body 1, improving the rigidity and stability of the entire bearing structure. This enables the bearing to better maintain its performance when bearing heavy loads or impact loads, improving the bearing's load-carrying capacity.

[0055] Combined with Figures 5 to 8 As shown, the first side ring 11 and / or the second side ring 12 has a groove 121 for placing a detection device. By providing the groove 121, some structures such as sensors can be placed in the groove 121 to facilitate the detection of the operation of the bearing.

[0056] In some embodiments, the first side ring 11 extends towards the center of the cage body 1; the second side ring 12 extends away from the center of the cage body 1. The connecting beam 13 is connected to the side of the first side ring 11 close to the second side ring 12 and the side of the second side ring 12 close to the first side ring 11, and the groove 121 is opened on the side of the first side ring 11 close to the second side ring 12.

[0057] The opening position, size and number of the groove 121 can be set according to different needs and are within the protection scope.

[0058] The groove 121 is a U-shaped groove to facilitate the installation and hiding of the detection device.

[0059] In addition, the present application also discloses a self-aligning roller bearing, including a self-aligning roller bearing cage. Among them, the self-aligning roller bearing cage is the self-aligning roller bearing cage disclosed in the above embodiments. Therefore, the self-aligning roller bearing with this self-aligning roller bearing cage also has all the above technical effects, which will not be elaborated one by one here.

[0060] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same and similar parts among the various embodiments, reference can be made to each other.

[0061] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A spherical roller bearing cage, characterized in that: include: A retainer body, the retainer body is a circular ring structure, the retainer body is circumferentially arranged with a plurality of window holes for placing rollers, two first side walls of the window holes opposite to each other along the axial direction of the retainer body are arcuate surfaces, and the arcuate surfaces protrude in a direction away from the window holes from a middle position along the axial direction of the retainer body; A support point protruding from the arc-shaped surface is provided at the middle position of the arc-shaped surface along the axial direction of the retainer body, and the support points of the two first side walls of the window hole form two-point supports for supporting the roller; The support point is an arc surface that can fit with the roller, the support points of the two first side walls are symmetrically arranged about the window hole, and the axial size of the support point along the retainer body is 1 / 6-1 / 5 of the axial size of the arc surface along the retainer body.

2. The spherical roller bearing cage according to claim 1, characterized in that: The window hole is provided with oil storage holes on two second side walls along the circumference of the retainer body.

3. The spherical roller bearing cage according to claim 2, characterized in that: The oil storage hole is opened at a position where the second side wall intersects the first side wall.

4. The spherical roller bearing cage according to claim 3, characterized in that: The oil storage hole is an arc-shaped groove opened on the second side wall near the first side wall, the notch of the arc-shaped groove faces the window hole, and the arc-shaped groove is a through groove that runs through the thickness of the second side wall; and / or, Four oil storage holes are arranged in the circumference of the window hole.

5. The spherical roller bearing cage according to any one of claims 1 to 4, characterized in that: The retainer body comprises: A first side ring, wherein the first side ring is a circular ring; a second side ring, wherein the second side ring is a circular ring, a diameter of the first side ring is smaller than a diameter of the second side ring, and the first side ring and the second side ring are arranged along the axial direction; A connecting beam is arranged along the axial direction of the retaining frame body and connects the first side ring and the second side ring. The window hole is formed between adjacent connecting beams, and the side wall of the connecting beam is the arc surface.

6. The spherical roller bearing cage according to claim 5, characterized in that: The thickness of the support point along the radial direction of the retainer body is the same as the thickness of the connecting beam along the radial direction of the retainer body.

7. The spherical roller bearing cage according to claim 5, characterized in that: The slope angle of the window hole is 45°-52°.

8. The spherical roller bearing cage according to claim 5, characterized in that: The first side ring and / or the second side ring has a groove for placing a detection device.

9. The spherical roller bearing cage according to claim 8, characterized in that: The first side ring extends in a direction toward the center of the retainer body; The second side ring extends in a direction away from the center of the retaining frame body, the connecting beam is connected to a side of the first side ring close to the second side ring and a side of the second side ring close to the first side ring, and the groove is opened on a side of the first side ring close to the second side ring.

10. A spherical roller bearing, characterized in that: It comprises a spherical roller bearing cage as claimed in any one of claims 1 to 9.

Images