Carrier axis sleeve fixing mechanism

Abstract

The utility model relates to the technical field of fixing devices, in particular to a carrier axis sleeve fixing mechanism. Comprising an axis sleeve and a new positioning pin which are movably connected. The side surface of the axis sleeve is provided with an axis sleeve groove, the new positioning pin comprises a cylindrical part and a head part, the head part is cuboid, the length a of the head part is larger than the width b of the head part, and the diameter of the cylindrical part is not larger than the width b of the head part; the head is clamped in the axis sleeve groove, and the depth h3 of the axis sleeve groove is not larger than the height h1 of the head. The cuboid head is additionally arranged on the basis of an original positioning pin, the contact area between the positioning pin and the groove of the axis sleeve is increased, friction is greatly reduced, and a wear part is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of fixing devices, in particular to a fixing mechanism for a vehicle axle sleeve. Background Art

[0002] Axle sleeves are commonly used in rotating structures such as bearings. As Figure 1 shown, the rotation of the axle sleeve is achieved by a positioning pin socketed in the center of the rotating body. The existing positioning pin is cylindrical. After using for a period of time, it is found that the section of the positioning pin in contact with the axle sleeve is severely worn, and the axle sleeve also shows serious wear. This is due to the large frictional force between the axle sleeve and the positioning pin during the rotation process. This situation seriously shortens the service life of the axle sleeve. If the worn axle sleeve is not discovered in time, it will cause the rotation of the axle sleeve and the rotating body to be inconsistent, affecting the operation of the equipment. Content of the Utility Model

[0003] Problem to be Solved: By optimizing the structure of the positioning pin, the frictional force between the positioning pin and the axle sleeve is reduced, thereby reducing the wear of the axle sleeve.

[0004] To achieve the above object, the utility model provides the following technical solution: A fixing mechanism for a vehicle axle sleeve, including an axle sleeve and a new positioning pin, which are movably connected between the axle sleeve and the new positioning pin; an axle sleeve groove is provided on the side surface of the axle sleeve. The new positioning pin includes a cylindrical part and a head. The shape of the head is a cuboid. The length a of the head is greater than the width b of the head. The diameter of the cylindrical part is not greater than the width b of the head; the head is clamped in the axle sleeve groove, and the depth h3 of the axle sleeve groove is not greater than the height h1 of the head.

[0005] Preferably, the width b1 of the axle sleeve groove is equal to the width b of the head.

[0006] Preferably, the depth h3 of the axle sleeve groove is equal to the height h1 of the head.

[0007] Preferably, the cylindrical part is located at the center position of the head.

[0008] Preferably, the diameter d of the cylindrical part is 4 mm, the height h of the cylindrical part is 15 mm, the length a of the head is 8 mm, the width b of the head is 4 mm, and the height h1 of the head is 2 mm.

[0009] Compared with the prior art, the utility model provides a fixing mechanism for a vehicle axle sleeve, which has the following beneficial effects: By adding a cuboid head on the basis of the original old positioning pin, the old positioning pin is cylindrical and is more likely to rotate in the axle sleeve groove and cause wear. The cuboid head makes the new positioning pin as a whole present a T-shaped structure. The head increases the contact area between the new positioning pin and the axle sleeve groove, greatly reducing the friction and avoiding the occurrence of wear. Description of the Drawings

[0010] Figure 1 The front view and top view of the shaft sleeve related to the present utility model;

[0011] Figure 2 Schematic diagram of the shaft sleeve groove before wear related to the present utility model;

[0012] Figure 3 Schematic diagram of the shaft sleeve groove after wear related to the present utility model;

[0013] Figure 4 The front view and top view of the old positioning pin in the prior art;

[0014] Figure 5 The front view and top view of the new positioning pin related to the present utility model;

[0015] Explanation of reference numerals: 1. Shaft sleeve; 11. Shaft sleeve groove; 12. Wear part; 2. Old positioning pin; 3. New positioning pin; 31. Cylindrical part; 32. Head. Specific implementation manner

[0016] The technical solutions in the embodiments of the present utility model will be described below with reference to the accompanying drawings in the embodiments of the present utility model:

[0017] As shown in the figure, Figure 1 is a structural schematic diagram of the shaft sleeve 1. The shaft sleeve 1 is cylindrical and has a shaft sleeve groove 11 on its side surface. The shaft sleeve 1 is arranged at the center of the rotating body and rotates with the rotating body. The old positioning pin 2 used in the prior art connects the shaft sleeve 1 and the rotating body. The structure of the old positioning pin 2 is as Figure 4 shown as cylindrical. One end of the old positioning pin 2 is clamped in the shaft sleeve groove 11, and the other end is connected to the installation hole reserved on the rotating body. After using for a period of time, the shaft sleeve groove 11 will change from the initial Figure 2 intact state to Figure 3 state, from Figure 3It can be seen that the groove 11 of the shaft sleeve has a worn part 12, and the cross-section of the worn part 12 is larger than that of the old positioning pin 2. The worn part 12 will cause the rotation of the shaft sleeve 1 and the rotating body to be asynchronous, affecting the operation of the equipment. The main reason for the formation of the worn part 12 is that after the cylindrical old positioning pin 2 is clamped with the groove 11 of the shaft sleeve, the contact between the two is line contact. At a certain rotation speed, the line contact makes the interaction force between the two greater and the friction force is also larger. Therefore, to solve this problem, it is necessary to consider designing a new positioning pin 3 from the essential reason. A surface contact can be formed between the new positioning pin 3 and the groove 11 of the shaft sleeve, which can greatly reduce the acting force between the two. The utility model provides a fixing mechanism for a vehicle shaft sleeve, which includes a shaft sleeve 1 and a new positioning pin 3. The shaft sleeve 1 and the new positioning pin 3 are movably connected; the new positioning pin 3 includes a cylindrical part 31 and a head 32. The shape of the head 32 is a cuboid. The length a of the head 32 is greater than the width b of the head 32. The diameter of the cylindrical part 31 is not greater than the width b of the head 32; the head 32 can be clamped in the groove 11 of the shaft sleeve, so that both sides of the head 32 are in contact with the inner wall of the groove 11 of the shaft sleeve, forming a symmetric surface contact on both sides; and the head 32 is in the shape of a cuboid and will not rotate in the groove 11 of the shaft sleeve to avoid wear. The depth h3 of the groove 11 of the shaft sleeve is not greater than the height h1 of the head 32 to avoid contact between the cylindrical part 31 and the groove 11 of the shaft sleeve.

[0018] In one embodiment, the width b1 of the groove 11 of the shaft sleeve is equal to the width b of the head 32, and the two are closely matched. When the depth h3 of the groove 11 of the shaft sleeve is equal to the height h1 of the head 32, the cylindrical part 31 just does not contact the groove 11 of the shaft sleeve. The cylindrical part 31 is located at the center of the head 32.

[0019] In the use of some specific scenarios, there are special requirements for the dimensions of the new positioning pin 3. One dimensional requirement is that the diameter d of the cylindrical part 31 is 4 mm, the height h of the cylindrical part 31 is 15 mm, the length a of the head 32 is 8 mm, the width b of the head 32 is 4 mm, and the height h1 of the head 32 is 2 mm.

[0020] The above embodiments are only part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Claims

1. A fixing mechanism for a vehicle axle sleeve, characterized in that: It includes an axis sleeve (1) and a new positioning pin (3), and the axis sleeve (1) and the new positioning pin (3) are movably connected; an axis sleeve groove (11) is provided on the side surface of the axis sleeve (1), the new positioning pin (3) includes a cylindrical part (31) and a head (32), the shape of the head (32) is a cuboid, the length a of the head (32) is greater than the width b of the head (32), and the diameter of the cylindrical part (31) is not greater than the width b of the head (32); the head (32) is clamped in the axis sleeve groove (11), and the depth h3 of the axis sleeve groove (11) is not greater than the height h1 of the head (32).

2. The vehicle axle sleeve fixing mechanism according to claim 1, characterized in that: The width b1 of the axis sleeve groove (11) is equal to the width b of the head (32).

3. The vehicle axle sleeve fixing mechanism according to claim 2, characterized in that: The depth h3 of the axis sleeve groove (11) is equal to the height h1 of the head (32).

4. The vehicle axle sleeve fixing mechanism according to claim 3, characterized in that: The cylindrical part (31) is located at the central position of the head (32).

5. The vehicle axle sleeve fixing mechanism according to claim 3, characterized in that: The diameter d of the cylindrical part (31) is 4 mm, the height h of the cylindrical part (31) is 15 mm, the length a of the head (32) is 8 mm, the width b of the head (32) is 4 mm, and the height h1 of the head (32) is 2 mm.

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