A rod end spherical bearing and an anti-loosening structure

Abstract

This utility model relates to the field of spherical bearing technology, and in particular to a rod end spherical bearing and an anti-loosening structure. It includes a rod body, with a bearing body rotatably mounted at one end and an anti-loosening hole at the other end. A mating hole is formed on the bearing body, penetrating through it. The anti-loosening hole is parallel to the axis of the rod body, with an internal thread on its wall and an external thread on the outer wall of the rod body. By simultaneously providing internal and external threads on the rod body, the anti-loosening structure can be directly connected to the inside of the rod body, resulting in a more aesthetically pleasing appearance and making it more suitable for applications where the anti-loosening structure's position is limited, thus meeting usage requirements.

Description

Technical Field

[0001] This utility model relates to the field of spherical bearing technology, and in particular to a rod end spherical bearing and an anti-loosening structure. Background Technology

[0002] Traditional rod end spherical plain bearings typically have internal or external threads on the rod end shank. When installing rod end spherical plain bearings with internal or external threads on the rod end shank, an additional nut is usually required to prevent loosening. This nut is typically externally mounted to prevent loosening.

[0003] In most applications, this type of rod end joint bearing does not present any problems. However, in some applications, such as those with special appearance requirements, like the joints of humanoid robots, the exposed nut of the rod end joint bearing cannot meet the requirements. Utility Model Content

[0004] To address the issue that in certain applications where existing rod end spherical bearings have special appearance requirements, such as the joints of humanoid robots, the exposed nuts of the rod end spherical bearings cannot meet the usage requirements, this application provides a rod end spherical bearing with the following specific solution.

[0005] A rod end spherical bearing includes a rod body, a bearing body rotatably mounted on one end of the rod body, and an anti-loosening hole provided on the other end of the rod body. A mating hole is provided on the bearing body, the mating hole penetrating the bearing body. The anti-loosening hole is arranged parallel to the axis of the rod body. An internal thread is provided on the wall of the anti-loosening hole, and an external thread is provided on the outer wall of the rod body.

[0006] By adopting the above technical solution, internal and external threads are simultaneously set on the rod body, and the anti-loosening structure can be directly connected to the inside of the rod body. This not only makes the appearance more aesthetically pleasing, but also makes it more suitable for applications where the position of the anti-loosening structure is limited, thus meeting the usage requirements.

[0007] Optionally, a guide surface is provided at the end of the anti-loosening hole away from the bearing body. The guide surface is inclined, with the end of the guide surface close to the bearing body being close to the axis of the anti-loosening hole, and the end of the guide surface away from the bearing body being away from the axis of the anti-loosening hole.

[0008] By adopting the above technical solution, an inclined guide surface is provided at the end of the anti-loosening hole away from the bearing body, which can play a guiding role when the screw is screwed into the anti-loosening hole, making it easier for the screw to be aligned with the anti-loosening hole and screwed in.

[0009] Optionally, a relief groove is provided at one end of the anti-loosening hole near the bearing body. The relief groove is connected to the anti-loosening hole and is tapered to allow screws to extend into it.

[0010] By adopting the above technical solution, a conical relief groove is provided at the end of the anti-loosening hole near the bearing body, which is connected to the anti-loosening hole for the screw to extend into. This can better cooperate with the screw for anti-loosening fixation and improve the stability and anti-loosening effect of the rod end spherical bearing.

[0011] Optionally, a guide surface is also provided on the outer wall of the end of the rod away from the bearing body. The guide surface is inclined, with the end of the guide surface away from the bearing body close to the axis of the rod, and the end of the guide surface close to the bearing body away from the axis of the rod.

[0012] By adopting the above technical solution, an inclined guide surface is provided on the outer wall of the end of the rod away from the bearing body, which can play a guiding role and facilitate the rod to be smoothly installed into the matching component.

[0013] Optionally, the rod body is provided with a mounting ring corresponding to the bearing body, the mounting ring is integrally formed with the rod body, and the bearing body is embedded in the mounting ring.

[0014] By adopting the above technical solution, an integrated mounting ring is set on the rod body corresponding to the bearing body, and the bearing body is embedded in the mounting ring, which can facilitate the installation of the bearing body and improve the stability and firmness of the overall structure of the rod end joint bearing.

[0015] Optionally, a transition arc surface is provided between the rod body and the mounting ring, the thickness of the mounting ring is smaller than the diameter of the rod body, and the transition arc surface is arranged around the circumference of the rod body.

[0016] By adopting the above technical solution, a transition arc surface is set between the rod and the mounting ring. The thickness of the mounting ring is smaller than the diameter of the rod. The transition arc surface is set around the circumference of the rod, which reduces stress concentration, enhances the structural strength of the connection between the rod and the mounting ring, and can also play a role in giving way to a certain extent.

[0017] This application also provides a rod end spherical bearing anti-loosening structure, including the above-mentioned rod end spherical bearing, and further including a pull rod. The rod body is embedded in the pull rod, and the rod body and the pull rod are threadedly connected. A screw is also provided in the pull rod, and the screw is threadedly connected in the anti-loosening hole. A limit protrusion is also provided in the pull rod corresponding to the screw, and the screw head can abut against the limit protrusion.

[0018] By adopting the above technical solution, the rod body of the rod end spherical bearing is threadedly connected to the tie rod, and then a screw is threadedly connected to the anti-loosening hole with the screw head abutting the limiting protrusion, thereby fixing the rod end spherical bearing to the tie rod. The rotation of the tie rod and the rotation of the screw interfere with each other, so the rod body is difficult to rotate off the tie rod, preventing the two from rotating relative to each other or loosening.

[0019] Optionally, a washer is provided between the limiting protrusion and the screw head, and the washer can abut against the inner wall of the pull rod.

[0020] By adopting the above technical solution, a washer that can abut against the inner wall of the tie rod can be set between the limiting protrusion and the screw head, which can increase the contact area between the screw head and the inner wall of the tie rod, disperse the pressure, and improve the stability and reliability of the connection between the rod end spherical bearing and the tie rod.

[0021] Optionally, a spring washer is provided between the washer and the screw head, with one side of the spring washer abutting the screw head and the other side of the spring washer abutting the washer.

[0022] By adopting the above technical solution, a spring washer is placed between the washer ring and the screw head, which can play a buffering role and disperse stress, thereby improving the stability and anti-loosening effect of the connection between the rod end spherical bearing and the tie rod.

[0023] In summary, this application has at least the following beneficial effects:

[0024] This application solves the problem that in some application scenarios, such as the joint parts of humanoid robots, the exposed nuts of existing rod end joint bearings cannot meet the usage requirements. It eliminates the need to expose the anti-loosening structure, thus meeting the specific usage scenarios and different usage needs. Attached Figure Description

[0025] Figure 1 This is a cross-sectional view of this embodiment.

[0026] Figure 2 This is a side view of this embodiment.

[0027] Figure 3 This is a cross-sectional view of this embodiment, mainly used to show the anti-loosening structure.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Rod body; 11. Anti-loosening hole; 111. Internal thread; 112. Guide surface; 113. Relief groove; 12. External thread; 13. Transition arc surface;

[0030] 2. Bearing body; 21. Mating hole; 22. Mounting ring;

[0031] 3. Pull rod; 31. Screw; 32. Washer; 33. Spring washer; 34. Limiting protrusion. Detailed Implementation

[0032] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] A rod end spherical bearing, such as Figure 1 and Figure 2As shown, the device includes a rod 1, with a bearing body 2 rotatably mounted at one end and an anti-loosening hole 11 at the other end. The bearing body 2 has a mating hole 21 that penetrates the bearing body 2. The anti-loosening hole 11 is parallel to the axis of the rod 1, and has an internal thread 111 on its wall. The outer wall of the rod 1 has an external thread 12. In practical implementation, the bearing body 2 can rotate omnidirectionally after installation. The anti-loosening structure is installed within the mating hole 21, eliminating the need for external exposure during installation and thus improving its applicability.

[0034] like Figure 1 and Figure 2 As shown, a guide surface 112 is provided at the end of the anti-loosening hole 11 away from the bearing body 2. The guide surface 112 is inclined, with the end of the guide surface 112 near the bearing body 2 close to the axis of the anti-loosening hole 11, and the end of the guide surface 112 away from the bearing body 2 away from the axis of the anti-loosening hole 11. A guide surface 112 is also provided on the outer wall of the end of the rod 1 away from the bearing body 2. The guide surface 112 is inclined, with the end of the guide surface 112 away from the bearing body 2 close to the axis of the rod 1, and the end of the guide surface 112 near the bearing body 2 away from the axis of the rod 1. In practical implementation, the guide surface 112 provides a guiding effect for the rod 1 during installation, further improving the stability and convenience of installation.

[0035] like Figure 1 and Figure 2 As shown, a relief groove 113 is provided at one end of the anti-loosening hole 11 near the bearing body 2. The relief groove 113 communicates with the anti-loosening hole 11 and is tapered to allow the screw 31 to extend into it. In specific implementation, the relief groove 113 is designed to correspond to the shape of the screw 31, which can effectively improve the compatibility.

[0036] like Figure 1 and Figure 2 As shown, a mounting ring 22 is provided on the rod body 1 corresponding to the bearing body 2. The mounting ring 22 is integrally formed with the rod body 1, and the bearing body 2 is embedded in the mounting ring 22. A transition arc surface 13 is provided between the rod body 1 and the mounting ring 22. The thickness of the mounting ring 22 is smaller than the diameter of the rod body 1, and the transition arc surface 13 is arranged circumferentially around the rod body 1. In specific implementation, the transition arc surface 13 can disperse stress and also provide clearance when the bearing body 2 rotates.

[0037] This embodiment also provides a rod end spherical bearing anti-loosening structure, such as Figure 3As shown, the assembly includes the aforementioned rod end joint bearing and a pull rod 3. A rod body 1 is embedded within the pull rod 3, and the rod body 1 and pull rod 3 are threaded together. A screw 31 is also provided within the pull rod 3, threaded into the anti-loosening hole 11. A limiting protrusion 34 is also provided within the pull rod 3 corresponding to the screw 31, and the screw head of the screw 31 abuts against the limiting protrusion 34. In practical implementation, after installation, when the rod body 1 rotates, it moves along the pull rod 3. The limiting protrusion 34 within the pull rod 3 restricts the movement of the screw 31, preventing it from turning out. The screw 31 and the rod body 1 interfere with each other, thus achieving locking and preventing loosening.

[0038] like Figure 3 As shown, a washer 32 is provided between the limiting protrusion 34 and the screw head 31, and the washer 32 can abut against the inner wall of the pull rod 3. A spring washer 33 is also provided between the washer 32 and the screw head 31. One side of the spring washer 33 is used to abut against the screw head 31, and the other side of the spring washer 33 is used to abut against the washer 32. In specific implementation, the washer 32 is made of a material that can absorb stress, such as rubber, while the spring washer 33 is made of a type with a certain degree of elasticity, both of which can achieve the effect of absorbing stress.

[0039] Working principle: Threads are provided on both the inside and outside of rod 1. When installing the anti-loosening structure, it can be directly installed inside rod 1 without the need for exposed bolts, which meets the usage requirements of different scenarios.

[0040] The above are preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rod end joint bearing, characterized by: The rod includes a rod body (1), one end of which is rotatably provided with a bearing body (2), and the other end of which is provided with an anti-loosening hole (11). The bearing body (2) is provided with a mating hole (21) that penetrates the bearing body (2). The anti-loosening hole (11) is parallel to the axis of the rod body (1). The wall of the anti-loosening hole (11) is provided with an internal thread (111), and the outer wall of the rod body (1) is provided with an external thread (12).

2. A rod end joint bearing according to claim 1, characterized in that: The anti-loosening hole (11) is provided with a guide surface (112) at the end away from the bearing body (2). The guide surface (112) is inclined. The end of the guide surface (112) close to the bearing body (2) is close to the axis of the anti-loosening hole (11), and the end of the guide surface (112) away from the bearing body (2) is away from the axis of the anti-loosening hole (11).

3. A rod end joint bearing according to claim 2, characterized in that: The anti-loosening hole (11) is provided with a relief groove (113) at one end near the bearing body (2). The relief groove (113) is connected to the anti-loosening hole (11). The relief groove (113) is cone-shaped and allows the screw (31) to extend into it.

4. A rod end joint bearing according to claim 2, characterized in that: A guide surface (112) is also provided on the outer wall of the end of the rod (1) away from the bearing body (2). The guide surface (112) is inclined. The end of the guide surface (112) away from the bearing body (2) is close to the axis of the rod (1), and the end of the guide surface (112) close to the bearing body (2) is away from the axis of the rod (1).

5. A rod end joint bearing according to claim 1, characterized in that: The rod (1) is provided with a mounting ring (22) corresponding to the bearing body (2). The mounting ring (22) is integrally provided with the rod (1), and the bearing body (2) is embedded in the mounting ring (22).

6. A rod end joint bearing according to claim 5, characterized in that: A transition arc surface (13) is provided between the rod (1) and the mounting ring (22). The thickness of the mounting ring (22) is less than the diameter of the rod (1). The transition arc surface (13) is arranged circumferentially around the rod (1).

7. A rod end knuckle bearing anti-looseness structure comprising the rod end knuckle bearing according to any one of claims 1 to 6, characterized in that: It also includes a pull rod (3), the rod body (1) is embedded in the pull rod (3), the rod body (1) and the pull rod (3) are threaded together, the pull rod (3) is also provided with a screw (31), the screw (31) is threaded into the anti-loosening hole (11), the pull rod (3) is also provided with a limiting protrusion (34) corresponding to the screw (31), and the screw head of the screw (31) can abut against the limiting protrusion (34).

8. A joint bearing anti-loose structure for a rod end according to claim 7, characterized in that: A washer (32) is also provided between the limiting protrusion (34) and the screw head of the screw (31), and the washer (32) can abut against the inner wall of the pull rod (3).

9. A joint bearing anti-loose structure for a rod end according to claim 8, characterized in that: A spring washer (33) is also provided between the washer (32) and the screw head (31). One side of the spring washer (33) is used to abut against the screw head (31), and the other side of the spring washer (33) is used to abut against the washer (32).

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