Needle bearing plastic retainer for vehicle

Abstract

The utility model discloses a plastic retainer of a needle roller bearing for a vehicle, which comprises a retainer body and a plurality of needle roller clamping grooves uniformly arranged along the circumferential side wall of the retainer body, annular oil storage grooves are arranged on the inner walls of the upper end and the lower end of each needle roller clamping groove, and the annular oil storage grooves of the adjacent needle roller clamping grooves are communicated with each other. Axial oil guide grooves are formed in the two side walls of the interior of each roller pin clamping groove and communicate with the annular oil storage grooves in the upper end and the lower end, a plurality of oil guide holes communicating with the annular oil storage grooves are formed in the upper end face and the lower end face of the retainer body correspondingly, and heat dissipation rings are symmetrically arranged at the two ends of the reinforcing ribs. The annular oil storage grooves, the axial oil guide grooves and the oil guide holes are communicated, lubricating oil can be guided to permeate into all the roller pin clamping grooves so that the roller pins can be lubricated, abrasion to the retainer body can be reduced, heat accumulation can be reduced, meanwhile, the arranged heat dissipation ring can help the retainer body dissipate heat outwards, and the service life of the retainer body is prolonged. The plastic high-temperature aging deformation is effectively inhibited.

Description

Technical Field

[0001] This utility model relates to the field of bearing processing technology, and in particular to a plastic cage for a needle roller bearing used in vehicles. Background Technology

[0002] Needle roller bearings are roller bearings with cylindrical rollers. Relative to their diameter, the rollers are both thin and long. These rollers are called needle rollers. The needle rollers are all located inside the cage, which partially encloses the needle rollers to isolate them. The cage is usually located between the inner and outer rings of the bearing. According to the type of material, they are mainly divided into metal cages and non-metal cages.

[0003] The existing plastic cage and needle rollers have poor lubrication. The friction of the needle rollers during operation not only aggravates the wear of the cage, but also easily generates more heat that accumulates inside the cage, accelerating the aging and deformation of the plastic.

[0004] To address this issue, we propose a plastic cage for vehicle needle roller bearings. Utility Model Content

[0005] The purpose of this invention is to provide a plastic retainer for needle roller bearings used in vehicles, in order to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A plastic cage for a vehicle needle roller bearing includes a cage body and a plurality of needle roller grooves evenly formed along the circumferential sidewall of the cage body. The upper and lower inner walls of each needle roller groove are provided with annular oil reservoirs, and the annular oil reservoirs of adjacent needle roller grooves are interconnected. Axial oil guide grooves are formed on both inner sidewalls of each needle roller groove, and these axial oil guide grooves connect to the annular oil reservoirs at the upper and lower ends. The upper and lower end faces of the cage body are provided with a plurality of oil guide holes communicating with the annular oil reservoirs. The outer circumferential sidewall of the cage body is also provided with a plurality of reinforcing ribs, distributed between adjacent needle roller grooves. Heat dissipation rings are symmetrically provided at both ends of each reinforcing rib. One end of the cage body is provided with a pair of connecting blocks (first and second), and the other end is provided with a pair of connecting blocks (second and third), with adjacent connecting blocks (first and second) being locked together by bolts.

[0008] In a further embodiment, the needle roller groove adopts a flared opening that is wider on the outside and narrower on the inside.

[0009] In a further embodiment, the annular oil storage tank is filled with porous ceramic fiber blocks.

[0010] In a further embodiment, the reinforcing rib protrudes from the outer wall of the cage body at a height less than the protrusion height of the needle roller.

[0011] In a further embodiment, the protrusion height of the heat dissipation ring relative to the outer side wall of the retainer body is less than the protrusion height of the needle roller.

[0012] In a further embodiment, the inner ring of the heat dissipation ring is provided with a protruding dovetail block, and the outer side wall of the retainer body is provided with a dovetail groove that matches the dovetail block.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention, by setting up an annular oil reservoir, an axial oil guide groove, and an oil guide hole that are connected, can guide lubricating oil to penetrate into each needle roller groove, so as to lubricate the needle rollers and reduce the friction between the needle rollers and the cage body. This not only helps to reduce wear on the cage body, but also reduces heat accumulation. At the same time, the heat dissipation ring can help the cage body dissipate heat outward, effectively inhibiting high-temperature aging and deformation of plastic. In addition, the reinforcing ribs help to enhance the support strength, making the entire cage more durable. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a partial structural diagram of the needle roller groove of this utility model;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the needle roller groove of this utility model;

[0018] Figure 4 This is a schematic diagram of the cross-sectional structure at the connection between the heat dissipation ring and the cage body of this utility model.

[0019] In the figure: 1. Cage body; 2. Needle roller groove; 3. Annular oil reservoir; 4. Shaft guide oil groove; 5. Oil guide hole; 6. Reinforcing rib; 7. Heat dissipation ring; 71. Dovetail block; 8. Connecting block one; 9. Connecting block two; 10. Bolt; 11. Porous ceramic fiber block; 12. Dovetail groove. Detailed Implementation

[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4 A plastic cage for a needle roller bearing in a vehicle includes a cage body 1 and a plurality of needle roller grooves 2 evenly opened along the circumferential sidewall of the cage body 1. The needle rollers are installed in the needle roller grooves 2. The inner walls of the upper and lower ends of the needle roller grooves 2 are provided with annular oil reservoirs 3, and the annular oil reservoirs 3 of adjacent needle roller grooves 2 are interconnected. The inner sidewalls of the needle roller grooves 2 are provided with axial oil guide grooves 4, and the axial oil guide grooves 4 are connected to the annular oil reservoirs 3 at the upper and lower ends. The upper and lower end faces of the cage body 1 are provided with a plurality of oil guide holes 5 that are connected to the annular oil reservoirs 3, so as to inject lubricating oil into the annular oil reservoirs 3 through the oil guide holes 5, thereby guiding the lubricating oil to penetrate into each needle roller groove 2, so as to lubricate the needle rollers and reduce the friction between the needle rollers and the cage body 1.

[0024] Specifically, the needle roller groove 2 adopts a flared opening that is wider on the outside and narrower on the inside, which facilitates the needle roller to be inserted into the needle roller groove 2. At the same time, the annular oil reservoir 3 is filled with porous ceramic fiber blocks 11 to achieve slow-release lubrication.

[0025] To further improve the strength of the cage, several reinforcing ribs 6 are provided on the outer circumferential side wall of the cage body 1. The reinforcing ribs 6 protrude outward and are integrally formed with the cage body 1. The reinforcing ribs 6 are distributed between adjacent needle roller grooves 2, thereby strengthening the support strength between adjacent needle roller grooves 2. Specifically, the protrusion height of the reinforcing ribs 6 relative to the outer side wall of the cage body 1 is less than the protrusion height of the needle rollers, thereby avoiding excessive protrusion of the reinforcing ribs 6 which would affect the contact between the needle rollers and the inner and outer rings of the bearing.

[0026] To accelerate heat dissipation from the cage and reduce heat buildup that could cause plastic aging, heat dissipation rings 7 are symmetrically provided at both ends of the reinforcing rib 6. Specifically, the heat dissipation rings 7 are made of metal, and the protrusion height of the heat dissipation rings 7 relative to the outer wall of the cage body 1 is less than the protrusion height of the needle rollers. This prevents the heat dissipation rings 7 from protruding excessively and affecting the contact between the needle rollers and the inner and outer rings of the bearing. At the same time, the inner ring of the heat dissipation rings 7 is provided with a protruding dovetail block 71, and a dovetail groove 12 that matches the dovetail block 71 is provided on the outer wall of the cage body 1. The dovetail block 71 is fitted into the dovetail groove 12, which not only enhances the connection stability but also increases the contact heat conduction area.

[0027] To facilitate the assembly of the cage body 1, a pair of connecting blocks 1 8 are provided at one end of the cage body 1. The connecting blocks 1 8 are located at the upper and lower corners of the cage body 1 at that end. A pair of connecting blocks 2 9 are provided at the other end of the cage body 1. The connecting blocks 2 9 are close to the opposite side of the connecting blocks 1 8, and the adjacent connecting blocks 1 8 and connecting blocks 2 9 are locked together by bolts 10 for easy assembly.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A plastic cage for a needle roller bearing used in vehicles, comprising a cage body (1) and a plurality of needle roller grooves (2) evenly formed along the circumferential sidewall of the cage body (1), characterized in that: The inner walls of the upper and lower ends of the needle roller groove (2) are provided with annular oil storage grooves (3), and the annular oil storage grooves (3) of adjacent needle roller grooves (2) are interconnected. The inner side walls of the needle roller groove (2) are provided with axial guide oil grooves (4), and the axial guide oil grooves (4) are connected to the annular oil storage grooves (3) at the upper and lower ends. The upper and lower end faces of the retainer body (1) are provided with several guide holes (5) that are connected to the annular oil storage grooves (3). The outer circumferential side wall of the retainer body (1) is also provided with several reinforcing ribs (6), and the reinforcing ribs (6) are distributed between adjacent needle roller grooves (2). The two ends of the reinforcing ribs (6) are symmetrically provided with heat dissipation rings (7). One end of the retainer body (1) is provided with a pair of connecting blocks one (8), and the other end is provided with a pair of connecting blocks two (9). The adjacent connecting blocks one (8) and connecting blocks two (9) are locked together by bolts (10).

2. The plastic retainer for a vehicle needle roller bearing according to claim 1, characterized in that: The needle roller groove (2) adopts a flared opening that is wider on the outside and narrower on the inside.

3. The plastic retainer for a vehicle needle roller bearing according to claim 1, characterized in that: The annular oil storage tank (3) is filled with porous ceramic fiber blocks (11).

4. The plastic retainer for a vehicle needle roller bearing according to claim 1, characterized in that: The height of the reinforcing rib (6) protruding from the outer side wall of the cage body (1) is less than the height of the needle roller.

5. A plastic retainer for a vehicle needle roller bearing according to claim 1, characterized in that: The protrusion height of the heat dissipation ring (7) relative to the outer side wall of the cage body (1) is less than the protrusion height of the needle roller.

6. A plastic retainer for a vehicle needle roller bearing according to claim 1, characterized in that: The inner ring of the heat dissipation ring (7) is provided with a protruding dovetail block (71), and the outer side wall of the retainer body (1) is provided with a dovetail groove (12) that matches the dovetail block (71).

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