A plain bearing for a rearview mirror of a motor vehicle

Abstract

The utility model relates to a kind of plane bearing for automobile rearview mirror, including bearing main body and lubricating assembly, bearing main body includes shaft piece group, steel ball being installed in the middle part of shaft piece group, retaining cage group being installed in the both sides of steel ball, lubricating assembly includes self-lubricating composite layer being installed on shaft piece group and oil storage structure being installed on retaining cage group, provide lubricating effect for steel ball continuously by self-lubricating composite layer, reduce friction coefficient, reduce abrasion, lubricating medium in oil storage structure is slowly released by oil storage hole, supplement to raceway surface, ensure long time lubricating effect, after long-term use, due to the existence of self-lubricating composite layer, bearing can still maintain good lubricating property, avoid the problem of abnormal sound caused by dry friction, in addition, the combination of porous metal layer and solid lubricant further enhances the durability and stability of lubrication, thereby prolongs the service life of plane bearing, improves the working reliability of automobile rearview mirror.

Description

Technical Field

[0001] This utility model relates to the field of automotive rearview mirror technology, and in particular to a planar bearing for automotive rearview mirrors. Background Technology

[0002] The automotive rearview mirror plane bearing is an axial bearing specifically used in the assembly of automotive electric rearview mirror folding mechanisms. Its core function is to be installed on the rotation pivot of the rearview mirror, bear the axial force parallel to the axis of the pivot, and allow smooth, low-friction relative rotation or oscillation between the rearview mirror housing and the base, thereby realizing the folding and unfolding action of the rearview mirror.

[0003] A search revealed a rearview mirror folding mechanism with publication number CN206884889U, comprising a manual folding mechanism. The manual folding mechanism includes a connecting gear (3), a connecting body (4), a plane bearing (5), a lower cover (6), and a chassis (7). The connecting gear (3), connecting body (4), plane bearing (5), lower cover (6), and chassis (7) are connected sequentially. The connecting body (4) and chassis (7) are fixed relative to each other in the circumferential direction. The connecting gear (3) and connecting body (4) are rotatably engaged. The lower cover (6) and chassis (7) are rotatably engaged. This invention also provides a rearview mirror comprising the aforementioned rearview mirror folding mechanism. In this invention, the limiting surfaces of the connecting body and chassis are straight, thus preventing circumferential gaps and eliminating empty angles, thereby preventing the folding mechanism from shaking due to internal mechanism issues.

[0004] The planar bearing used in the rearview mirror of the car disclosed in this patent will cause abnormal noise due to dry friction between the steel ball and the raceway after a period of use due to lubrication failure, which will affect the quality of use, reduce the service life, and reduce its practicality. Utility Model Content

[0005] In response to the technical problem in existing patents that the dry friction noise between the steel balls and raceways caused by lubrication failure after a period of use in the planar bearings used in automotive rearview mirrors affects the quality of use, service life, and has low practicality, this utility model provides a planar bearing for automotive rearview mirrors.

[0006] The technical solution adopted in this utility model is: a planar bearing for automobile rearview mirrors, comprising:

[0007] The bearing body includes a bearing plate assembly, steel balls mounted in the middle of the bearing plate assembly, and cage assemblies mounted on both sides of the steel balls;

[0008] A lubrication assembly is mounted on the shaft assembly and the cage assembly, and the lubrication assembly is used to achieve self-lubrication of the steel ball;

[0009] The lubrication assembly includes a self-lubricating composite layer mounted on the shaft assembly and an oil storage structure mounted on the cage assembly.

[0010] Furthermore, the shaft assembly includes an upper shaft piece mounted on the top of the steel ball and a lower shaft piece mounted on the bottom of the steel ball. Both the bottom of the upper shaft piece and the top of the lower shaft piece are provided with raceways, and the self-lubricating composite layer is mounted on the surface of the raceways.

[0011] Furthermore, the self-lubricating composite layer is formed by sintering a porous metal layer on the surface of a substrate and impregnating it with a solid lubricant. The porous metal layer is a porous bronze layer, and the solid lubricant is polytetrafluoroethylene or molybdenum disulfide.

[0012] Furthermore, the cage assembly includes an outer cage installed on the outside of the steel ball and an inner cage installed on the inside of the steel ball, and the oil storage structure includes an oil storage hole opened on the outer cage and the inner cage and a lubricating medium installed inside the oil storage hole.

[0013] Furthermore, the oil storage hole is specifically a through hole, a blind hole, or a recess.

[0014] The beneficial effects of this utility model are:

[0015] The self-lubricating composite layer continuously lubricates the steel balls, reducing the coefficient of friction and wear. The lubricating medium in the oil reservoir is slowly released through the oil reservoir holes to replenish the raceway surface, ensuring long-term lubrication. Even after long-term use, the bearing can still maintain good lubrication performance due to the presence of the self-lubricating composite layer, avoiding abnormal noise caused by dry friction. In addition, the combination of porous metal layer and solid lubricant further enhances the durability and stability of lubrication, thereby extending the service life of the planar bearing and improving the working reliability of the automotive rearview mirror. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0017] Figure 2 This is a half-sectional three-dimensional structural diagram of the present invention;

[0018] Figure 3 This is a three-dimensional structural diagram of the disassembled central axis piece assembly of this utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of the disassembled cage assembly in this utility model.

[0020] The diagram is marked as follows:

[0021] 1. Bearing body; 101. Shaft plate assembly; 102. Steel balls; 103. Cage assembly;

[0022] 2. Lubrication components; 201. Self-lubricating composite layer; 202. Oil storage structure;

[0023] 3. Upper shaft plate; 4. Lower shaft plate; 5. Raceway; 6. Outer cage; 7. Inner cage; 8. Oil reservoir; 9. Lubricating medium. Detailed Implementation

[0024] In the description of this utility model, it should be noted that the terms "front", "up", "down", "left", "right", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0025] 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 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.

[0026] The following is in conjunction with the appendix Figure 1-4 The present invention will be further described below.

[0027] To address the problems existing in the background art, this application proposes the following technical solution:

[0028] A planar bearing for automotive rearview mirrors includes: a bearing body 1 and a lubrication assembly 2;

[0029] The bearing body 1 includes a bearing plate assembly 101, a steel ball 102 installed in the middle of the bearing plate assembly 101, and a cage assembly 103 installed on both sides of the steel ball 102;

[0030] The shaft assembly 101 includes an upper shaft 3 mounted on the top of the steel ball 102 and a lower shaft 4 mounted on the bottom of the steel ball 102. Both the bottom of the upper shaft 3 and the top of the lower shaft 4 are provided with raceways 5.

[0031] The cage assembly 103 includes an outer cage 6 installed on the outside of the steel ball 102 and an inner cage 7 installed on the inside of the steel ball 102;

[0032] The outer retainer 6 and the inner retainer 7 are coaxially arranged.

[0033] like Figure 1-4 As shown, the lubrication assembly 2 is installed on the shaft plate assembly 101 and the cage assembly 103. The lubrication assembly 2 is used to achieve self-lubrication of the steel ball 102.

[0034] The lubrication assembly 2 includes a self-lubricating composite layer 201 mounted on the bearing assembly 101 and an oil storage structure 202 mounted on the cage assembly 103. The self-lubricating composite layer 201 is mounted on the surface of the raceway 5.

[0035] Furthermore, the self-lubricating composite layer 201 is formed by sintering a porous metal layer on the surface of a substrate and impregnating it with a solid lubricant. The porous metal layer is a porous bronze layer, and the solid lubricant is polytetrafluoroethylene or molybdenum disulfide.

[0036] Furthermore, the oil storage structure 202 includes an oil storage hole 8 opened on the outer retainer 6 and the inner retainer 7 and a lubricating medium 9 installed inside the oil storage hole 8.

[0037] Furthermore, the oil storage hole 8 is specifically a through hole, a blind hole, or a recess.

[0038] Working principle: During use, the steel ball 102 rolls within the raceway 5. The self-lubricating composite layer 201 continuously provides lubrication for the steel ball 102, reducing the coefficient of friction and wear. The lubricating medium 9 in the oil storage structure 202 is slowly released through the oil storage hole 8, replenishing the surface of the raceway 5 to ensure long-term lubrication. When the rearview mirror is folded or unfolded, the steel ball 102 rolls stably under the constraint of the cage assembly 103. The outer cage 6 and the inner cage 7 work together to prevent the steel ball 102 from deviating from the track. Even after long-term use, the bearing can still maintain good lubrication performance due to the presence of the self-lubricating composite layer 201, avoiding abnormal noise caused by dry friction. In addition, the combination of porous metal layer and solid lubricant further enhances the durability and stability of lubrication, thereby extending the service life of the planar bearing and improving the working reliability of the rearview mirror.

[0039] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0040] Although embodiments of the present invention have been shown and described, the scope of the present invention will be defined by the appended claims and their equivalents for those skilled in the art.

Claims

1. A plain bearing for a rearview mirror of a motor vehicle, characterized in that include: The bearing body (1) includes a bearing plate assembly (101), a steel ball (102) installed in the middle of the bearing plate assembly (101), and a cage assembly (103) installed on both sides of the steel ball (102). Lubrication assembly (2), which is mounted on the shaft assembly (101) and the cage assembly (103), is used to achieve self-lubrication of the steel ball (102); The lubrication assembly (2) includes a self-lubricating composite layer (201) mounted on the shaft assembly (101) and an oil storage structure (202) mounted on the cage assembly (103).

2. A plain bearing for a rearview mirror of a vehicle according to claim 1, characterized in that The shaft assembly (101) includes an upper shaft piece (3) installed on the top of the steel ball (102) and a lower shaft piece (4) installed on the bottom of the steel ball (102). The bottom of the upper shaft piece (3) and the top of the lower shaft piece (4) are provided with raceways (5), and the self-lubricating composite layer (201) is installed on the surface of the raceway (5).

3. A plain bearing for a rearview mirror of a vehicle according to claim 2, characterized in that The self-lubricating composite layer (201) is formed by sintering a porous metal layer on the surface of a substrate and impregnating it with a solid lubricant. The porous metal layer is a porous bronze layer, and the solid lubricant is polytetrafluoroethylene or molybdenum disulfide.

4. The planar bearing for a rearview mirror of a vehicle according to claim 1, wherein The cage assembly (103) includes an outer cage (6) installed on the outside of the steel ball (102) and an inner cage (7) installed on the inside of the steel ball (102). The oil storage structure (202) includes an oil storage hole (8) opened on the outer cage (6) and the inner cage (7) and a lubricating medium (9) installed inside the oil storage hole (8).

5. A plain bearing for a motor vehicle mirror according to claim 4, characterized in that The oil storage hole (8) is specifically a through hole, a blind hole, or a pit.

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