Radial spherical plain bearing

Abstract

The utility model discloses a radial spherical plain bearing which comprises an inner ring and an outer ring which are matched with each other, and further comprises two neck bushings, each neck bush comprises a sleeve part and a flange part formed at one end of the sleeve part, and the sleeve parts of the two neck bushings are respectively embedded into an inner hole of the inner ring from the two ends of the inner ring in an interference mode. The step surfaces of the flange parts of the two neck bushings are respectively pressed on the end surfaces of the two ends of the inner ring, and pin shaft holes which are axially aligned and are used for mounting a pin shaft in an interference manner are formed in the two sleeve parts. According to the utility model, the two neck bushings are additionally arranged in the inner ring, during installation, the pin shaft is in interference penetrating and sleeving fit with the pin shaft holes in the sleeve parts of the two neck bushings, the sleeve parts of the neck bushings are in interference fit with the inner hole of the inner ring, and the flange parts are arranged at the outer ends of the two sleeve parts; the end faces of the two ends of the inner ring are pressed and limited through the step faces of the flange parts, even for a small-size bearing structure, the axial movement preventing effect can be effectively achieved on the bearing, and the use stability of the bearing is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, specifically to a radial joint bearing. Background Technology

[0002] In some bearing applications, axial movement of the bearing is not required. The conventional method is to use a clamping plate in the mounting structure to lock the two end faces of the inner ring, thereby limiting the bearing's axial movement during use. However, for some small bearings, due to their smaller end face dimensions, clamping plates and similar structures may not be able to stably clamp the inner ring end faces. This can lead to a risk of axial movement during use due to unstable locking between the clamping plate and the inner ring end faces. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a radial spherical bearing, which mainly solves the technical problem of axial movement risk in existing small-sized bearings during use.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0005] A radial spherical plain bearing includes an inner ring and an outer ring that are adapted to each other, and two inner bushings. Each inner bushing includes a sleeve portion and a flange portion formed at one end of the sleeve portion. The sleeve portions of the two inner bushings are respectively interference-fitted into the inner bore of the inner ring from both ends. The stepped surfaces of the flange portions of the two inner bushings are respectively pressed against the end faces of the two ends of the inner ring, and pin holes are formed in the two sleeve portions for interference-fitting of pins.

[0006] Furthermore, the outer ring is a crack-free, one-piece outer ring structure manufactured through an extrusion molding process.

[0007] Furthermore, the inner diameter D1 of the inner ring end face is 4mm to 30mm, and the outer diameter D2 of the inner ring end face is 6mm to 34mm.

[0008] Furthermore, the outer diameter D3 of the flange is configured to be greater than D1 and less than D2.

[0009] Furthermore, when the pin to be assembled is interference-fitted into the pin holes of the two inner bushings, the flanges of the two inner bushings exert a pressure limiting effect on the two end faces of the inner ring to prevent axial movement of the inner ring.

[0010] Furthermore, the inner liner is made of steel.

[0011] Furthermore, an oil injection hole is provided on the outer ring, which radially penetrates the inner and outer walls.

[0012] Furthermore, a self-lubricating gasket that matches the outer spherical surface of the inner ring is provided on the inner spherical surface.

[0013] Furthermore, the self-lubricating gasket is a PTFE self-lubricating gasket.

[0014] The above technical solution has the following advantages or beneficial effects:

[0015] In the radial spherical plain bearing described in this utility model, by adding two inner bushings to the inner ring, during installation, the pin is interference-fitted with the pin holes in the sleeve portion of the two inner bushings, and the sleeve portion of the inner bushing is interference-fitted with the inner hole of the inner ring. Furthermore, a flange portion is provided at the outer end of the two sleeve portions, and the stepped surface of the flange portion is used to press and limit the two end faces of the inner ring. Even for small-sized bearing structures, it can effectively prevent axial movement of the bearing, greatly improving the stability of the bearing in use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the bearing assembly structure according to Embodiment 1 of this utility model.

[0017] Figure 2 This is an exploded structural diagram of the bearing according to Embodiment 1 of this utility model.

[0018] Figure 3 This is a schematic diagram of the bearing assembly structure according to Embodiment 2 of this utility model.

[0019] Label Explanation:

[0020] 1. Inner ring, 2. Outer ring, 3. Inner bushing, 4. Self-lubricating gasket, 21. Oil injection hole, 31. Sleeve part, 32. Flange part, 311. Pin hole, 321. Stepped surface. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", 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.

[0023] Example 1

[0024] Please refer to the appendix. Figure 1 Appendix Figure 2An embodiment of this utility model provides a radial spherical plain bearing, including an inner ring 1 and an outer ring 2 that are adapted to each other. The bearing is characterized by further including two inner bushings 3. Each inner bushing 3 includes a sleeve portion 31 and a flange portion 32 formed at one end of the sleeve portion 31. The sleeve portions 31 of the two inner bushings 3 are respectively interference-fitted into the inner hole of the inner ring 1 from both ends. The stepped surfaces 321 of the flange portions 32 of the two inner bushings 3 are respectively pressed against the end faces of both ends of the inner ring 1. The two sleeve portions 31 are formed with axially aligned pin holes 311 for interference-fitting of pins. It is understood that in this embodiment, by adding two inner bushings 3 in the inner ring 1, during installation, the pin (not shown) is press-fitted with the pin hole 311 in the sleeve portion 31 of the two inner bushings 3, and the sleeve portion 31 of the inner bushing 3 is press-fitted with the inner hole of the inner ring 1. Furthermore, a flange portion 32 is provided at the outer end of the two sleeve portions 31. The stepped surface 321 of the flange portion 32 is used to press and limit the two end faces of the inner ring 1. Even for small-sized bearing structures, it can effectively prevent axial movement of the bearing and greatly improve the stability of the bearing.

[0025] Please refer to the appendix. Figure 1 Appendix Figure 2 In one preferred embodiment, the outer ring 2 is a crack-free, one-piece outer ring structure manufactured by extrusion molding. This design further reduces the risk of axial movement during bearing use.

[0026] Please refer to the appendix. Figure 1 Appendix Figure 2 In one preferred embodiment, the inner diameter D1 of the inner ring 1 end face is 4mm to 30mm, and the outer diameter D2 of the inner ring end face is 6mm to 34mm. Preferably, the outer diameter D3 of the flange portion 32 is configured to be greater than D1 and less than D2.

[0027] Please refer to the appendix. Figure 1 Appendix Figure 2 In one preferred embodiment, the inner liner 3 is a steel inner liner structure. However, those skilled in the art should understand that in other embodiments, the inner liner 3 is not limited to the specific implementation disclosed in this embodiment, and may also be made of other materials in the art that have the same or similar properties as steel.

[0028] Please refer to the appendix. Figure 1 Appendix Figure 2 In one preferred embodiment, an oil injection hole 21 is provided on the outer ring 2, which radially penetrates the inner and outer walls.

[0029] Example 2

[0030] Please refer to the appendix. Figure 3The difference between this embodiment and Embodiment 1 is that a self-lubricating pad 4 that matches the outer spherical surface of the inner ring 1 is provided on the inner spherical surface of the outer ring 2. The self-lubricating pad 4 is a PTFE self-lubricating pad.

[0031] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model. Therefore, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A radial spherical plain bearing, comprising an inner ring (1) and an outer ring (2) that are adapted to each other, characterized in that: It also includes two inner bushings (3), each inner bushing (3) including a sleeve portion (31) and a flange portion (32) formed at one end of the sleeve portion (31). The sleeve portions (31) of the two inner bushings (3) are respectively inserted into the inner hole of the inner ring (1) from both ends. The stepped surfaces (321) of the two flange portions (32) are respectively pressed against the end faces of the two ends of the inner ring (1), and the two sleeve portions (31) have axially aligned pin holes (311) for interference mounting of pins.

2. The radial spherical bearing according to claim 1, characterized in that: The outer ring (2) is a crack-free, one-piece outer ring structure manufactured by extrusion molding.

3. The radial spherical bearing according to claim 1, characterized in that: The inner diameter D1 of the inner ring (1) end face is 4mm to 30mm, and the outer diameter D2 of the inner ring (1) end face is 6mm to 34mm.

4. The radial joint bearing according to claim 3, characterized in that: The outer diameter D3 of the flange (32) is configured to be greater than D1 and less than D2.

5. The radial spherical bearing according to claim 1, characterized in that: When the pin to be assembled is interference-fitted into the pin hole (311) of the two inner bushings (3), the flange portion (32) of the two inner bushings (3) forms a pressure limiting effect on the two end faces of the inner ring (1) to prevent the inner ring (1) from axial movement.

6. The radial spherical bearing according to claim 1, characterized in that: The inner liner (3) is a steel inner liner structure.

7. The radial spherical plain bearing according to any one of claims 1 to 6, characterized in that: An oil injection hole (21) is provided on the outer ring (2) that runs radially through the inner and outer walls.

8. The radial spherical plain bearing according to any one of claims 1 to 6, characterized in that: The inner spherical surface of the outer ring (2) is provided with a self-lubricating pad (4) that matches the outer spherical surface of the inner ring (1).

9. The radial spherical bearing according to claim 8, characterized in that: The self-lubricating liner (4) is a PTFE self-lubricating liner.

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