Bearing locking structure

Abstract

The utility model relates to a bearing locking structure. The bearing locking structure comprises a shell; a bearing is mounted between the contact surfaces of the bearing seat and the shell; the adjusting nut is installed on the shell and the bearing seat in a threaded connection mode, the adjusting nut is used for axially pressing a bearing installed between the bearing seat and the shell, and a plurality of locking grooves are formed in the end face, facing the outer side, of the adjusting nut; and the locking piece is installed on the shell, a locking convex part is arranged on the locking piece, an included angle is formed between the center line of the locking convex part and the center line of the locking piece, and the locking convex part is arranged in the locking groove to achieve locking of the adjusting nut. According to the bearing locking structure disclosed by the utility model, the angle of the adjusting locking plate is reset to multiply and axially adjust the minimum unit distance under the condition that the adjusting nut of the differential mechanism is not changed, and mainly, the extending end of the adjusting locking plate is made into an asymmetric structure, the locking angle is designed, and the minimum unit distance is multiplied and axially adjusted through positive and negative assembly.

Description

Technical Field

[0001] This utility model relates to the field of differential technology, and in particular to a bearing locking structure. Background Technology

[0002] The differential is an essential transmission structure in modern vehicles, enabling the left and right (or front and rear) drive wheels to rotate at different speeds. It mainly consists of left and right half-shaft gears, two planetary gears, and a gear carrier. Differentials typically use an adjusting nut mechanism to adjust the axial position of the differential assembly and the preload of the differential bearings. The adjusting nut is locked using a locking plate structure.

[0003] Taking an existing adjusting nut at the main reduction gear as an example (e.g.) Figure 1 As shown), the pitch is 2mm and the nut has 24 slots. The minimum axial adjustment unit distance formed by each slot is 2mm / 24=0.082mm. This length is definitely insufficient for adjusting the axial length.

[0004] The adjustment distance of the adjusting nut is limited by the thread pitch and the number of grooves. For an adjusting nut with n grooves and a thread pitch, the minimum unit distance for axial adjustment is a / n. The increase in the number of grooves is limited by the groove width (the width of the locking plate affects the strength of the locking plate), the thickness between the grooves of the adjusting nut, and the diameter of the adjusting nut. It is difficult for any of these three influencing factors to increase by a factor of two. Utility Model Content

[0005] Therefore, the technical problem to be solved by this utility model is to overcome the problem of insufficient adjustment distance of the axis of the adjusting nut caused by the structure of the locking plate in the prior art.

[0006] To solve the above-mentioned technical problems, this utility model provides a bearing locking structure, including: a housing; a bearing seat assembled with the housing, wherein a bearing is installed between the contact surfaces of the bearing seat and the housing; an adjusting nut installed on the housing and the bearing seat by means of a threaded connection, and the adjusting nut is used to axially press the bearing installed between the bearing seat and the housing, wherein the adjusting nut has a plurality of locking grooves on its outer end face; and a locking plate installed on the housing, wherein the locking plate has a locking protrusion, wherein the center line of the locking protrusion and the center line of the locking plate are at an angle, and the locking protrusion is disposed in the locking groove to realize the locking of the adjusting nut.

[0007] In one embodiment of this utility model, the adjusting nut has an external thread on its outer circumferential wall, and the adjusting nut is connected to the bearing seat and the housing through the external thread.

[0008] In one embodiment of this utility model, the cross-section of the adjusting nut is circular, and the plurality of locking grooves are arranged in a circular array with the center of the adjusting nut as the center.

[0009] In one embodiment of this utility model, the number of locking grooves is n, the pitch of the adjusting nut is a, the number of locking pieces is x, and the minimum unit distance of the adjusting nut's axial movement is a / n / 2x.

[0010] In one embodiment of this utility model, the locking angle of the m-th locking piece is: 360° / 4x*(2m-1).

[0011] In one embodiment of this utility model, the locking protrusion is rectangular, and the side of the locking protrusion opposite to the locking groove is parallel to the line connecting the center of the locking protrusion and the center of the adjusting nut.

[0012] In one embodiment of this utility model, the locking groove is a rectangular groove, and the locking groove is arranged along the radial direction of the adjusting nut.

[0013] In one embodiment of this utility model, the locking piece is provided with at least one mounting hole.

[0014] In one embodiment of this utility model, a locking screw is provided at the mounting hole position, and the locking piece is locked to the bearing seat or housing by the locking screw.

[0015] In one embodiment of this utility model, the width of the locking protrusion is smaller than the width of the locking groove.

[0016] Compared with the prior art, the above-mentioned technical solution of this utility model has the following beneficial effects:

[0017] The bearing locking structure described in this utility model, without changing the differential adjusting nut, resets the angle of the adjusting locking plate to multiply the minimum unit distance of axial adjustment. The main feature is to make the protruding end of the adjusting locking plate into an asymmetrical structure and design the locking angle. By assembling in both directions, the minimum unit distance of axial adjustment is multiplied. Regardless of the locking angle, it points to the center of the adjusting nut, and the locking width is the same as the existing solution. Attached Figure Description

[0018] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0019] Figure 1 This is a schematic diagram of the prior art in a preferred embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the bearing locking structure during installation in a preferred embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the bearing locking structure in a preferred embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the locking piece in the preferred embodiment of this utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the locking piece in the preferred embodiment of this utility model, embodiment two;

[0024] Figure 6 This is a schematic diagram of the structure of the preferred embodiment of the present invention when the locking plate is installed in the forward direction and the locking angle is 1.875°;

[0025] Figure 7 This is a schematic diagram of the structure of the preferred embodiment of the present invention when the locking plate is installed in reverse and the locking angle is 1.875°;

[0026] Figure 8 This is a schematic diagram of the structure of the preferred embodiment of the present invention when the locking plate is installed in the forward direction and the locking angle is 5.625°;

[0027] Figure 9 This is a schematic diagram of the structure of the preferred embodiment of the present invention when the locking plate is installed in reverse and the locking angle is 5.625°.

[0028] The following are the markings on the attached drawings: housing 1, locking plate 3, locking protrusion 31, mounting hole 32, locking screw 33, adjusting nut 4, locking groove 41, bearing seat 5. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0030] Reference Figure 1-5As shown, the bearing locking structure of this utility model includes several parts: a housing 1, a bearing seat 5, an adjusting nut 4, and a locking plate 3. The bearing seat 5 is assembled with the housing 1, and a bearing is installed between the contact surfaces of the bearing seat 5 and the housing 1. The adjusting nut 4 is installed on the housing 1 and the bearing seat 5 by a threaded connection, and the adjusting nut 4 is used to axially press the bearing installed between the bearing seat 5 and the housing 1. The adjusting nut 4 has several locking grooves 41 on its outward-facing end face. The locking plate 3 is installed on the housing 1, and the locking plate 3 has a locking protrusion 31. The centerline of the locking protrusion 31 and the centerline of the locking plate 3 form an angle. The locking protrusion 31 is positioned in the locking grooves 41 to lock the adjusting nut 4, preventing it from rotating. That is, the line connecting the center of the locking protrusion 31 and the center of the adjusting nut 4 forms a certain angle with the line connecting the center of the locking plate 3 and the center of the adjusting nut 4, thus creating an asymmetrical arrangement where the locking protrusion 31 is offset from the centerline of the locking plate 3. Taking the adjusting nut 4 with 24 evenly distributed locking grooves 41 as an example, the 24 locking grooves 41 are arranged in a circular array. In this way, the angle of the 24 locking grooves 41 within the 360° circumference is divided into 360° / 24=15°, that is, the angle between adjacent locking grooves 41 is 15°. Each time the adjusting nut 4 is adjusted, it must be rotated 15 degrees before the position of the next locking groove 41 can be rotated.

[0031] When the locking angle of the symmetrical structure locking plate is 0°, the symmetrical structure locking plate is defined as the center line of the locking protrusion on the symmetrical structure locking plate, the center line of the adjusting nut 4 and the center line of the locking plate 3 being on the same straight line, and the straight line they are on is the radial direction of the adjusting nut 4.

[0032] Compared to the locking protrusion 31 in this utility model with a symmetrical locking plate structure, when two locking plates 3 are provided, the locking angle of the first locking plate is 15° / 8 = 1.875°, and the locking angle of the second locking plate is 15° / 8*3 = 5.625°. The final minimum axial adjustment unit distance is 1.5mm / 24 / 4 = 0.015625mm. This minimum unit distance takes into account the clearance fit between the locking plate 3 and the adjusting nut 4, as well as the clearance fit of the threads, and the actual minimum unit distance should be sufficient. When three locking plates 3 are provided, the locking angle of the first locking plate is 15° / 12 = 1.25°, the locking angle of the second locking plate is 15° / 12*3 = 3.75°, and the locking angle of the third locking plate is 15° / 12*5 = 6.25°. The final minimum axial adjustment unit distance is 1.5mm / 24 / 6 = 0.01525mm = 0.0104mm.

[0033] In the above structure, the adjusting nut 4 has an external thread on its outer circumference, and the adjusting nut 4 is connected to the bearing seat 5 and the housing 1 through the external thread. Rotating the adjusting nut 4 can change the position of the adjusting nut 4 screwed into the bearing seat 5 and the housing 1, thereby changing the degree of compression between the adjusting nut 4 and the bearing. This is the purpose of adjusting the axial distance of the adjusting nut 4 in this utility model. The smaller the minimum unit distance of axial adjustment of the adjusting nut 4, the higher the adjustment distance of the adjusting nut 4.

[0034] In the above structure, the adjusting nut 4 has a circular cross-section, and the plurality of locking grooves 41 are arranged in a circular array with the center of the adjusting nut 4 as the center. The locking protrusion 31 is rectangular, and the side of the locking protrusion 31 opposite to the locking groove 41 is parallel to the line connecting the center of the locking protrusion 31 and the center of the adjusting nut 4. The locking groove 41 is a rectangular groove, and the locking groove 41 is arranged along the radial direction of the adjusting nut 4. At the same time, the width of the locking protrusion 31 is smaller than the width of the locking groove 41.

[0035] In the above structure, the number of locking grooves 41 is n, the pitch of the adjusting nut 4 is a, the number of locking pieces 3 is x, and the minimum unit distance of movement of the adjusting nut 4 in the axial direction is a / n / 2x. The locking angle of the m-th locking piece 3 is 360° / 4x*2m-1.

[0036] In addition, the locking piece 3 is provided with at least one mounting hole 32. A locking screw 33 is provided at the mounting hole 32, and the locking piece 3 is locked to the bearing seat 5 or the housing 1 by the locking screw 33.

[0037] Reference Figure 6-9 As shown, taking the combination of two types of locking plates 3 as an example, and symmetrical assembly to increase the adjustment distance by four times, with 24 teeth, the original accuracy is 360 degrees / 24=15 degrees. Dividing this 15 degrees into eight equal parts, with the symmetrical locking plate as 0 degrees, we extract nine positions: -7.5 degrees, -5.625 degrees, -3.75 degrees, -1.875 degrees, 0 degrees, 1.875 degrees, 3.75 degrees, 5.625 degrees, and 7.5 degrees, for a total angle of 15 degrees. The locking angle of the first locking plate is 15° / 8=1.875°, and the locking angle of the second locking plate is 15° / 8*3=5.625°. The final axial adjustment distance is: 2mm / 24 / 4=0.0208mm. ±1.875 degrees is achieved by installing the locking plate 3 in both directions, and ±5.625 degrees is also achieved by installing the locking plate 3 in both directions. According to the calculation results, the adjustment distance is greatly improved.

[0038] By simultaneously reducing the pitch to 1.5mm, the axial adjustment distance can be increased to 0.015mm. With the help of three locking plates, an axial adjustment distance of 0.01mm can be achieved.

[0039] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A bearing locking structure, characterized in that, include: case; A bearing housing, which is assembled with a housing, wherein a bearing is installed between the contact surfaces of the bearing housing and the housing; An adjusting nut is installed on the housing and bearing seat by means of a threaded connection, and the adjusting nut is used to axially press the bearing installed between the bearing seat and the housing. The adjusting nut has several locking grooves on its outer end face. A locking plate is mounted on the housing. The locking plate has a locking protrusion. There is an angle between the center line of the locking protrusion and the center line of the locking plate. The locking protrusion is disposed in the locking groove to achieve locking of the adjusting nut.

2. The bearing locking structure according to claim 1, characterized in that: The adjusting nut has an external thread on its outer circumference, and the adjusting nut is connected to the bearing seat and the housing through the external thread.

3. The bearing locking structure according to claim 2, characterized in that: The cross-section of the adjusting nut is circular, and the plurality of locking grooves are arranged in a circular array with the center of the adjusting nut as the center.

4. The bearing locking structure according to claim 3, characterized in that: The number of locking grooves is n, the pitch of the adjusting nut is a, the number of locking pieces is x, and the minimum unit distance that the adjusting nut can move in the axial direction is a / n / 2x.

5. The bearing locking structure according to claim 4, characterized in that: The locking angle of the m-th locking piece is: 360° / 4x*(2m-1).

6. The bearing locking structure according to claim 1, characterized in that: The locking protrusion is rectangular, and the side of the locking protrusion opposite to the locking groove is parallel to the line connecting the center of the locking protrusion and the center of the adjusting nut.

7. The bearing locking structure according to claim 6, characterized in that: The locking groove is a rectangular groove, and the locking groove is set along the radial direction of the adjusting nut.

8. The bearing locking structure according to claim 1, characterized in that: The locking plate has at least one mounting hole.

9. The bearing locking structure according to claim 8, characterized in that: The mounting hole is provided with a locking screw, and the locking piece is locked to the bearing seat or housing by the locking screw.

10. The bearing locking structure according to claim 6, characterized in that: The width of the locking protrusion is smaller than the width of the locking groove.

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