Wear-resistant positioning pin

Abstract

The utility model relates to a wear-resistant positioning pin which comprises a pin body and further comprises a plurality of rolling columns, and the pin body is provided with a plurality of rolling grooves which extend in the length direction of the pin body and are annularly arrayed along the axis of the pin body. The rolling columns are rotationally arranged on the pin body and kept in the rolling grooves one by one, and the side faces of the rolling columns protrude out of the side face of the pin body. According to the wear-resistant positioning pin, sliding friction between the positioning pin and a connected object is converted into rolling friction, so that the wear between the positioning pin and the object after the positioning pin is connected with the object is reduced, and the wear resistance of the positioning pin is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of hardware, in particular to a wear-resistant positioning pin. Background Art

[0002] A locating pin is a piece of hardware used to position and connect two objects, including a locating pin that enables the rotation of the two objects after they are connected. Existing locating pins are generally in the shape of a bare rod. When the connected object rotates along the locating pin, it will directly contact the peripheral side of the locating pin, causing wear of the locating pin. In order to enhance the wear resistance of the locating pin, the existing method is to use wear-resistant metal to make the locating pin. However, while the wear-resistant metal improves the wear resistance of the locating pin, it will also increase the brittleness of the locating pin, and the locating pin may break during use.

[0003] In view of the above problems, the present invention makes improvements. Utility Model Content

[0004] The utility model provides a wear-resistant positioning pin, which solves the above-mentioned problems existing in the prior art during use.

[0005] The technical solution of the present utility model is achieved as follows:

[0006] A wear-resistant positioning pin includes a pin body and a plurality of rolling cylinders. The pin body is provided with a plurality of rolling grooves extending along the length direction of the pin body and arranged in a circular array along the axis of the pin body. The plurality of rolling cylinders are rotatably arranged on the pin body and are retained one by one in the plurality of rolling grooves, and the side surfaces of the rolling cylinders protrude from the side surfaces of the pin body.

[0007] Preferably, the rolling groove is provided with a first mounting groove and a second mounting groove at both ends along the length direction, and the rolling column is provided with a first mounting column and a second mounting column matching the first mounting groove and the second mounting groove at both ends along the length direction, and the first mounting column and the second mounting column are respectively placed in the first mounting groove and the second mounting groove, and the pin body is fixedly connected with a first limiting ring and a second limiting ring that respectively cover the openings of the first mounting groove and the second mounting groove on the side of the pin body.

[0008] Preferably, the first limiting ring is provided with a plurality of fastening bolts threadedly connected to the pin body, a screw connection column is formed at the end of the pin body, and the second limiting ring is threadedly connected to the screw connection column.

[0009] Preferably, the pin body, the first limiting ring and the second limiting ring are made of stainless steel, and the rolling column is made of tungsten steel.

[0010] Preferably, a first dust-proof convex ring and a second dust-proof convex ring are formed on the side surfaces of the first limiting ring and the second limiting ring respectively.

[0011] Preferably, a first sealing ring groove and a second sealing ring groove are respectively formed on the side surfaces of the first dustproof convex ring and the second dustproof convex ring, and a first sealing ring and a second sealing ring are respectively provided in the first sealing ring groove and the second sealing ring groove.

[0012] Preferably, the first dust-proof convex ring and the second dust-proof convex ring are respectively provided with a first contact ring and a second contact ring made of polytetrafluoroethylene material, and the inner sides of the first contact ring and the second contact ring are respectively provided with a third sealing ring groove and a fourth sealing ring groove, the first sealing ring is retained in the first sealing ring groove and the third sealing ring groove, and the second sealing ring is retained in the second sealing ring groove and the fourth sealing ring groove.

[0013] To sum up, the beneficial effect of the present invention is that after the locating pin is inserted into the pin hole of the object to be connected and installed, the rolling column in close contact with the inner wall of the pin hole provides a positioning effect for the object, and rotates in the rolling groove with the rotating object, thereby converting the sliding friction between the locating pin and the rotating object in the prior art into rolling friction, thereby reducing the wear between the locating pin and the object after connecting the object, and enhancing the wear resistance of the locating pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0015] Figure 1 It is a structural diagram of the utility model;

[0016] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0017] Figure 3 for Figure 2 A magnified schematic diagram of point A in the middle;

[0018] Figure 4 for Figure 2 A magnified schematic diagram of point B in the middle;

[0019] Figure 5 It is an exploded schematic diagram of the present utility model.

[0020] In the figure: 1. Pin body; 11. Rolling groove; 12. First mounting groove; 13. Second mounting groove; 14. Screw column; 2. Rolling column; 21. First mounting column; 22. Second mounting column; 3. First limiting ring; 31. First dustproof convex ring; 32. First sealing ring groove; 4. Second limiting ring; 41. Second dustproof convex ring; 42. Second sealing ring groove; 5. Fastening bolt; 6. First sealing ring; 7. Second sealing ring; 8. First contact ring; 81. Third sealing ring groove; 9. Second contact ring; 91. Fourth sealing ring groove. DETAILED DESCRIPTION

[0021] The following is a combination of the appended examples of the present invention Figure 1-4 , clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0022] As shown in the figure, a wear-resistant locating pin includes a pin body 1 and a plurality of rolling cylinders 2. The pin body 1 is provided with a plurality of rolling grooves 11 extending along the length direction of the pin body 1 and arranged in a circular array along the axis of the pin body 1. The plurality of rolling cylinders 2 are rotatably arranged on the pin body 1 and are retained one by one in the plurality of rolling grooves 11, and the side surfaces of the rolling cylinders 2 protrude from the side surfaces of the pin body 1.

[0023] Specifically, the structure in which the rolling column 2 is rotatably disposed on the pin body 1 is as follows:

[0024] The rolling groove 11 is respectively provided with a first mounting groove 12 and a second mounting groove 13 at both ends along the length direction, and the rolling column 2 is respectively formed with a first mounting column 21 and a second mounting column 22 matching the first mounting groove 12 and the second mounting groove 13 at both ends along the length direction, and the first mounting column 21 and the second mounting column 22 are respectively placed in the first mounting groove 12 and the second mounting groove 13, and the pin body 1 is fixedly connected with a first limiting ring 3 and a second limiting ring 4 which respectively cover the openings of the first mounting groove 12 and the second mounting groove 13 on the side of the pin body 1, and the first limiting ring 3 and the second limiting ring 4 respectively impose radial limiting on the first mounting column 21 and the second mounting column 22, so that the first mounting column 21 and the second mounting column 22 are respectively stably maintained in the first mounting groove 12 and the second mounting groove 13, thereby realizing the rotational connection between the rolling column 2 and the pin body 1.

[0025] Specifically, the first limiting ring 3 and the second limiting ring 4 are fixedly connected to the pin body 1:

[0026] The first limiting ring 3 is sleeved on the pin body 1 and the first limiting ring 3 is provided with a number of fastening bolts 5 screwed on the pin body 1 to achieve a fixed connection between the first limiting ring 3 and the pin body 1. A screw column 14 is formed at the end of the pin body 1, and the second limiting ring 4 is screwed on the screw column 14 and sleeved on the pin body 1 to achieve a fixed connection between the second limiting ring 4 and the pin body 1.

[0027] Specifically, the pin body 1 , the first limiting ring 3 and the second limiting ring 4 are made of stainless steel, and the rolling column 2 is made of tungsten steel.

[0028] In the above structure, when installing and using this positioning pin, the pin body 1 is passed through the pin hole opened on the object to be connected and screwed to the installation surface to realize the installation of the object to be connected. After the pin body 1 passes through the pin hole, the side surface of the rolling column 2 is in close contact with the inner wall of the pin hole, and the object is positioned by cooperating with the pin hole. When the object rotates along the pin body 1, the object drives the rolling column 2 to rotate on the pin body 1 through the close contact with the rolling column 2, and the sliding friction between the positioning pin and the rotating object in the prior art is converted into rolling friction, thereby reducing the wear between the positioning pin and the object after the object is connected, and enhancing the wear resistance of the positioning pin. The first limiting ring 3 and the second limiting ring 4 are used to limit the first installation column 21 and the second installation column 22 and then the rolling column 2, so that the rolling column 2 is stable The structure is fixedly maintained in rotation in the rolling groove 11. The rolling column 2 can be easily disassembled and assembled by disassembling and assembling the first limit ring 3 and the second limit ring 4, which facilitates the assembly of the locating pin, thereby facilitating the maintenance and replacement of the rolling column 2 that is worn due to direct contact with the object during use of the locating pin. The first limit ring 3 is fixedly connected to the pin body 1 by the fastening bolt 5 and the second limit ring 4 is fixedly connected to the pin body 1 by screwing with the screw column 14, which is very convenient for disassembly and assembly of the first limit ring 3 and the second limit ring 4, thereby facilitating the disassembly and assembly of the rolling column 2. The pin body 1 is made of stainless steel, which makes the pin body 1 have excellent toughness, thereby preventing the pin body 1 from breaking during use. The rolling column 2 made of tungsten steel has excellent wear resistance, thereby ensuring the overall wear resistance of the locating pin.

[0029] In addition, a first dust-proof convex ring 31 and a second dust-proof convex ring 41 are respectively formed on the side surfaces of the first limiting ring 3 and the second limiting ring 4. The first dust-proof convex ring 31 and the second dust-proof convex ring 41 are respectively located on one side of the two ends of the rolling column 2. The first dust-proof convex ring 31 and the second dust-proof convex ring 41 cooperate with the inner wall of the pin hole to prevent dust and other impurities from entering the rolling groove 11 and affecting the rotation of the rolling column 2 in the rolling groove 11, thereby ensuring the stability and smoothness of the rotation of the object after the locating pin is connected to the object, and also avoiding the entry of impurities to cause wear of the rolling column 2 and the pin body 1, thereby enhancing the wear resistance of the locating pin.

[0030] In addition, a first sealing ring groove 32 and a second sealing ring groove 42 are respectively provided on the side surfaces of the first dustproof convex ring 31 and the second dustproof convex ring 41. A first sealing ring 6 and a second sealing ring 7 are respectively provided in the first sealing ring groove 32 and the second sealing ring groove 42. The dustproof performance of the locating pin is enhanced by the cooperation between the first sealing ring 6 and the second sealing ring 7 and the inner wall of the pin hole.

[0031] In addition, the first dustproof convex ring 31 and the second dustproof convex ring 41 are respectively provided with a first contact ring 8 and a second contact ring 9 made of polytetrafluoroethylene material, and the inner sides of the first contact ring 8 and the second contact ring 9 are respectively provided with a third sealing ring groove 81 and a fourth sealing ring groove 91. The first sealing ring 6 is retained in the first sealing ring groove 32 and the third sealing ring groove 81, and the second sealing ring 7 is retained in the second sealing ring groove 42 and the fourth sealing ring groove 91. After the locating pin is inserted into the pin hole, the first contact ring 8 and the second contact ring 9 are in contact with the inner wall of the pin hole due to the elastic force of the first sealing ring 6 and the second sealing ring 7. Based on the good lubricity of polytetrafluoroethylene, the smoothness of the rotation of the object is guaranteed, and the first sealing ring 6 and the second sealing ring 7 are isolated from the inner wall of the pin hole to prevent the wear caused by the contact between the first sealing ring 6 and the second sealing ring 7 and the inner wall of the pin hole, thereby enhancing the dustproof performance of the locating pin.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A wear-resistant positioning pin, comprising a pin body (1), characterized in that: It also includes a plurality of rolling columns (2), the pin body (1) is provided with a plurality of rolling grooves (11) extending along the length direction of the pin body (1) and arranged in a circular array along the axis of the pin body (1), and the plurality of rolling columns (2) are rotatably arranged on the pin body (1) and are retained one by one in the plurality of rolling grooves (11), and the side surfaces of the rolling columns (2) protrude from the side surfaces of the pin body (1).

2. The wear-resistant positioning pin according to claim 1, characterized in that: The rolling groove (11) is provided with a first mounting groove (12) and a second mounting groove (13) at both ends along the length direction, and the rolling column (2) is provided with a first mounting column (21) and a second mounting column (22) matching the first mounting groove (12) and the second mounting groove (13) at both ends along the length direction, and the first mounting column (21) and the second mounting column (22) are respectively placed in the first mounting groove (12) and the second mounting groove (13), and the pin body (1) is fixedly connected with a first limiting ring (3) and a second limiting ring (4) which respectively cover the openings of the first mounting groove (12) and the second mounting groove (13) on the side of the pin body (1).

3. The wear-resistant positioning pin according to claim 2, characterized in that: The first limiting ring (3) is provided with a plurality of fastening bolts (5) screwed onto the pin body (1); a screw connection column (14) is formed at the end of the pin body (1); and the second limiting ring (4) is screwed onto the screw connection column (14).

4. The wear-resistant positioning pin according to claim 3, characterized in that: The pin body (1), the first limiting ring (3) and the second limiting ring (4) are made of stainless steel, and the rolling column (2) is made of tungsten steel.

5. The wear-resistant positioning pin according to claim 4, characterized in that: A first dust-proof convex ring (31) and a second dust-proof convex ring (41) are respectively formed on the side surfaces of the first limiting ring (3) and the second limiting ring (4).

6. The wear-resistant positioning pin according to claim 5, characterized in that: A first sealing ring groove (32) and a second sealing ring groove (42) are respectively provided on the side surfaces of the first dustproof convex ring (31) and the second dustproof convex ring (41), and a first sealing ring (6) and a second sealing ring (7) are respectively provided in the first sealing ring groove (32) and the second sealing ring groove (42).

7. The wear-resistant positioning pin according to claim 6, characterized in that: A first contact ring (8) and a second contact ring (9) made of polytetrafluoroethylene are respectively sleeved on the first dustproof convex ring (31) and the second dustproof convex ring (41), and a third sealing ring groove (81) and a fourth sealing ring groove (91) are respectively opened on the inner side surfaces of the first contact ring (8) and the second contact ring (9), the first sealing ring (6) is retained in the first sealing ring groove (32) and the third sealing ring groove (81), and the second sealing ring (7) is retained in the second sealing ring groove (42) and the fourth sealing ring groove (91).

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