Thrust bearing retainer

Abstract

The utility model discloses a thrust bearing retainer which comprises an annular body, the annular body is provided with a shaft hole used for installing a rotating shaft and a plurality of pockets used for installing rolling bodies, the shaft hole and the annular body are coaxially arranged, and the pockets are evenly distributed on the outer side of the shaft hole in the circumferential direction of the annular body and in the radial direction of the annular body. Openings are formed in the sides, facing the outside of the annular body, of the pockets; in the axial direction of the rotating shaft, the ends, facing the rotating shaft and / or away from the rotating shaft, of the pockets are provided with extending parts protruding towards the rotating shaft, and the extending parts can limit the rolling bodies. Through the arrangement of the mounting grooves and the openings of the pocket holes, material reduction and weight reduction of the annular body can be realized, the overall light weight of the retainer and the bearing is facilitated, and by adopting the arrangement mode, friction can be reduced, noise reduction is facilitated, and adverse effects on the working condition of the bearing caused by heat generated by friction are reduced; and meanwhile, circulation of lubricating oil and / or lubricating grease among the rotating body, the pockets and the bearing outer ring is facilitated, and friction is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing cages, and particularly relates to a thrust bearing cage. Background Art

[0002] In existing industrial production equipment or daily necessities, a thrust ball bearing is a common shaft-matching part and a general part for installing various shafts, so it is widely used. The thrust ball bearing mainly bears axial loads. The thrust ball bearing mainly includes two upper and lower annular pressing rings, a cage located between the two pressing rings, and balls installed on the cage.

[0003] The cage of the thrust ball bearing in the prior art is usually a whole-piece structure, and circumferentially closed receiving holes for receiving the balls are provided on the cage. The balls need to be inserted into the receiving holes along the axial direction of the receiving holes, so as to complete the installation of the balls and the cage.

[0004] There is a deficiency in the structural design of the prior art cage and balls that the inside of the thrust ball bearing cannot be fully lubricated. In this way, during the operation of the thrust ball bearing, its own temperature will become relatively high, which easily leads to the failure of the thrust ball bearing. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a thrust bearing cage to solve the problem that due to the deficiency in the structural design of the existing cage and balls that the inside of the thrust ball bearing cannot be fully lubricated, during the operation of the thrust ball bearing, its own temperature will become relatively high, which easily leads to the failure of the thrust ball bearing.

[0006] To achieve the above purpose, the utility model provides a thrust bearing cage, including an annular body. The annular body is provided with a shaft hole for installing a rotating shaft and a plurality of pocket holes for installing rolling elements. The shaft hole is coaxially arranged with the annular body. The plurality of pocket holes are circumferentially evenly distributed outside the shaft hole around the annular body, and along the radial direction of the annular body, one side of the pocket hole facing the outside of the annular body has an opening; along the axial direction of the rotating shaft, one end of the pocket hole facing the rotating shaft and / or away from the rotating shaft has an extension protruding towards the rotating shaft, and the extension can limit the rolling element.

[0007] As a preferred embodiment of the present application, the annular body is provided with a plurality of installation grooves circumferentially around the annular body, and the pocket holes are arranged inside the installation grooves.

[0008] As a preferred embodiment of the present application, the protruding distance of the extension does not exceed the groove depth of the installation groove.

[0009] As a preferred embodiment of the present application, an arc-shaped groove is provided on the inner wall of the pocket hole; the inner wall of the extension portion has an extension region, a limiting region, and a guiding region. Along the axial direction of the pocket hole, the extension region, the limiting region, and the guiding region are arranged in sequence. The extension region is connected to the arc-shaped groove and the inner walls of the extension region and the arc-shaped groove are within the same spherical range;

[0010] The projection of the limiting region on the axial direction of the pocket hole falls inside the projection of the pocket hole; the guiding region extends away from the pocket hole in both the axial and radial directions of the pocket hole.

[0011] As a preferred embodiment of the present application, an oil storage portion is further provided in the installation groove, and the oil storage portion is communicated with the pocket hole.

[0012] As a preferred embodiment of the present application, an arc-shaped transition surface is provided at the connection between the oil storage portion and the pocket hole.

[0013] As a preferred embodiment of the present application, along the axial direction of the rotating shaft, the opening area of the pocket hole at the end facing the rotating shaft is not less than the opening area of the pocket hole at the end away from the rotating shaft.

[0014] As a preferred embodiment of the present application, guiding surfaces extending obliquely towards the inside of the shaft hole are provided on the inner walls at both ends of the shaft hole.

[0015] As a preferred embodiment of the present application, a curved surface portion is provided at the edge of the annular body along the axial direction of the rotating shaft.

[0016] As a preferred embodiment of the present application, an oil passing groove is further provided on the surface of the annular body; and / or the oil passing groove can be communicated with the pocket hole.

[0017] Due to the adoption of the above technical solutions, the beneficial effects obtained by the present application are as follows:

[0018] 1. In the above solution, through the setting of the installation groove and the opening of the pocket hole, weight reduction of the annular body can be achieved, which is beneficial to the lightweight of the cage and the overall bearing. Moreover, adopting this setting method can also reduce friction, which is beneficial to noise reduction and reducing the adverse effects of frictional heat generation on the bearing working conditions. At the same time, it is also beneficial to the circulation of lubricating oil and / or grease between the rotating body, the pocket hole, and the bearing outer ring, further reducing friction.

[0019] 2. In the above solution, the extension region can be used as a part of the pocket hole to expand the limiting range of the pocket hole for the rotating body. At the same time, in cooperation with the setting of the limiting region, the limiting effect on the rotating body in the axial direction of the pocket hole is further improved to prevent the rotating body from falling off. The setting of the guiding region facilitates the installation of the rotating body into the pocket hole.

[0020] 3. The setting of the arc transition surface makes it more convenient for the lubricating oil and / or grease in the oil storage part to enter the pocket holes and the oil storage grooves in the pocket holes, which is beneficial to improving the lubrication effect on the rotating body, reducing the friction between the rotating body, the pocket holes and the outer ring of the bearing, thereby reducing noise, reducing the consumption of lubricating oil caused by frictional heat generation, and reducing the wear of the rotating body, the pocket holes and the outer ring of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0022] Figure 1 is a schematic structural diagram of a thrust bearing cage in an example;

[0023] Figure 2 is a schematic structural diagram of a part of the pocket hole in an example;

[0024] Figure 3 is a schematic structural diagram of the edge of the annular body in an example.

[0025] List of components and reference numerals:

[0026] 1 Annular body, 11 Axial hole, 111 Guide surface, 12 Mounting groove, 121 Oil storage part, 13 Curved surface part;

[0027] 2 Pocket hole, 21 Arc transition surface, 22 Extension part, 221 Extension area, 222 Limiting area, 223 Guiding area, 23 Arc groove, 24 Opening. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] In order to more clearly illustrate the overall concept of the present invention, the following will be further described in detail by way of examples in combination with the accompanying drawings of the specification.

[0029] It should be noted that many specific details are set forth in the following description in order to provide a thorough understanding of the present invention. However, the present invention may be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0030] Refer to Figures 1-3As shown in the figure, the present application discloses a thrust bearing cage, which includes an annular body 1. The annular body 1 is provided with a shaft hole 11 for installing a rotating shaft and a plurality of pocket holes 2 for installing rolling elements. The shaft hole 11 is coaxially arranged with the annular body 1. The plurality of pocket holes 2 are circumferentially distributed outside the shaft hole 11 around the annular body 1, and along the radial direction of the annular body 1, one side of the pocket hole 2 facing the outside of the annular body 1 has an opening 24; along the axial direction of the rotating shaft, one end of the pocket hole 2 facing the rotating shaft and / or away from the rotating shaft has an extension 22 protruding towards the rotating shaft, and the extension 22 can limit the rolling elements. In one example, referring to Figure 1 and Figure 2 As shown, as a preferred embodiment of the present application, the annular body 1 is provided with a plurality of installation grooves 12 around its circumference. The aforementioned pocket holes 2 are arranged inside the installation grooves 12, and the protruding distance of the extension 22 does not exceed the groove depth of the installation groove 12.

[0031] In the above solution, through the arrangement of the installation groove 12 and the opening 24 of the pocket hole 2, weight reduction by material removal of the annular body 1 can be achieved, which is beneficial to the lightweight of the cage and the overall bearing, and adopting this setting method can also reduce friction, which is beneficial to noise reduction and reducing the adverse effects of heat generated by friction on the bearing working conditions. At the same time, it is also beneficial to the circulation of lubricating oil and / or grease between the rotating elements, pocket holes 2, and the bearing outer ring, further reducing friction.

[0032] Furthermore, referring to Figure 2 As shown, as a preferred embodiment of this example, the inner wall of the pocket hole 2 is provided with an arc-shaped groove 23; the inner wall of the extension 22 has an extension area 221, a limiting area 222, and a guiding area 223. Along the axial direction of the pocket hole 2, the extension area 221, the limiting area 222, and the guiding area 223 are arranged in sequence. The extension area 221 is connected to the arc-shaped groove 23, and the inner wall of the extension area 221 and the inner wall of the arc-shaped groove 23 are within the same spherical range. And the projection of the limiting area 222 in the axial direction of the pocket hole 2 falls within the projection of the pocket hole 2; the guiding area 223 extends in both the axial and radial directions of the pocket hole 2 away from the pocket hole 2. In the above solution, the extension area 221 can be used as a part of the pocket hole 2 to expand the limiting range of the pocket hole 2 for the rotating element, and at the same time, in cooperation with the setting of the limiting area 222, the limiting effect on the rotating element in the axial direction of the pocket hole 2 is further improved to prevent the rotating element from falling off. The setting of the guiding area 223 facilitates the installation of the rotating element into the pocket hole 2.

[0033] It should be noted here that the setting methods of the oil storage groove and the limiting part in the present application are not limited to the above examples. The above examples are only preferred examples of the present application, and other more different setting methods can also be adopted. The present application does not make specific limitations on this.

[0034] Furthermore, referring to Figure 2As shown, as a preferred embodiment of the present application, the installation groove 12 is further provided with an oil storage part 121, and the oil storage part 121 communicates with the pocket 2. Preferably, an arc transition surface 21 is provided at the connection between the oil storage part 121 and the pocket 2. Through the setting of the arc transition surface 21, it is more convenient for the lubricating oil and / or grease in the oil storage part 121 to enter the pocket 2 and the oil storage groove in the pocket 2, which is beneficial to improving the lubrication effect on the rotating body, reducing the friction between the rotating body, the pocket 2 and the bearing outer ring, thereby reducing noise, reducing the consumption of lubricating oil due to frictional heat generation, and reducing the wear of the rotating body, the pocket 2 and the bearing outer ring.

[0035] In a preferred example, referring to Figure 1 and Figure 2 and Figure 3 As shown, along the axial direction of the rotating shaft, the area of the opening 24 at one end of the pocket 2 facing the rotating shaft is not less than the area of the opening 24 at the end of the pocket 2 away from the rotating shaft, and a curved surface part 13 is provided at the edge of the annular body 1; guide surfaces 111 extending obliquely towards the inside of the shaft hole 11 are provided on both inner walls at the two ends of the shaft hole 11, and an oil passage groove is also formed on the surface of the annular body 1, and the oil passage groove can communicate with the pocket 2. Adopting this structure is beneficial to further reducing material and weight, and can also make it more convenient to fit and install the cage and the bearing outer ring, as well as the rotating shaft and the bearing.

[0036] The technical solution protected by the present utility model is not limited to the above embodiments. It should be noted that the combination of the technical solution of any one embodiment with the technical solutions of one or more other embodiments is within the protection scope of the present utility model. Although the present utility model has been described in detail above with general descriptions and specific embodiments, based on the present utility model, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present utility model all belong to the scope of protection required by the present utility model.

Claims

1. A thrust bearing retainer, characterized in that: It includes an annular body, which is provided with an axial hole for installing a rotating shaft and a plurality of pockets for installing rolling bodies, the axial hole is coaxially arranged with the annular body, the plurality of pockets are evenly distributed on the outside of the axial hole around the circumference of the annular body, and along the radial direction of the annular body, the pockets have an opening on the side facing the outside of the annular body; along the axial direction of the rotating shaft, the pockets have an extension protruding toward the rotating shaft at one end facing the rotating shaft and / or away from the rotating shaft, and the extension can limit the rolling body.

2. The thrust bearing retainer according to claim 1, characterized in that: The annular body is provided with a plurality of installation grooves around the circumference of the annular body, and the pockets are provided inside the installation grooves.

3. The thrust bearing retainer according to claim 2, characterized in that: The protruding distance of the extension portion does not exceed the groove depth of the installation groove.

4. The thrust bearing retainer according to claim 2, characterized in that: The inner wall of the pocket hole is provided with an arc-shaped groove; the inner wall of the extension portion has an extension area, a limit area and a guide area, and along the axial direction of the pocket hole, the extension area, the limit area and the guide area are arranged in sequence, the extension area is connected to the arc-shaped groove, and the extension area and the inner wall of the arc-shaped groove are within the same spherical range; The projection of the limiting area in the axial direction of the pocket hole falls inside the projection of the pocket hole; the guiding area extends in the direction away from the pocket hole in both the axial direction and the radial direction of the pocket hole.

5. The thrust bearing retainer according to claim 4, characterized in that: The mounting groove is also provided with an oil storage portion, and the oil storage portion is communicated with the pocket hole.

6. The thrust bearing retainer according to claim 5, characterized in that: An arc-shaped transition surface is provided at the connection between the oil storage portion and the pocket.

7. The thrust bearing retainer according to claim 4, characterized in that: Along the axial direction of the rotating shaft, the opening area of ​​the pocket hole toward one end of the rotating shaft is not less than the opening area of ​​the pocket hole away from the end of the rotating shaft.

8. The thrust bearing retainer according to claim 1, characterized in that: The inner walls at both ends of the shaft hole are provided with guide surfaces extending obliquely toward the inside of the shaft hole.

9. The thrust bearing retainer according to claim 1, characterized in that: Along the axial direction of the rotating shaft, the edge of the annular body is provided with a curved surface portion.

10. The thrust bearing retainer according to claim 1, characterized in that: The surface of the annular body is also provided with an oil groove; and / or the oil groove can be connected with the pocket.

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