Ball joint bearing with rolling bodies

Abstract

The utility model relates to the field of knuckle bearings, in particular to a ball knuckle bearing with a rolling body, which comprises a ball seat, a retainer, the rolling body and a ball pin, one end of the ball seat is provided with a placing groove, the retainer is connected to the groove wall of the placing groove, and one end of the retainer deviating from the groove bottom of the placing groove is provided with a mounting groove. The rolling body is connected to the retainer in a rolling mode, the ball pin is arranged in the installation groove, and the ball pin is connected to the rolling body in a rolling mode. The retainer supports the rolling body, the rolling body can bear the action of multi-dimensional force, sliding friction is converted into rolling friction, motion friction force is reduced, and rotation flexibility is improved.

Description

Technical Field

[0001] This application relates to the field of spherical plain bearings, and more particularly to a ball joint spherical plain bearing with rolling elements. Background Technology

[0002] With the acceleration of global industrialization and the increasing prominence of population aging, the demand for robots in modern society is experiencing explosive growth. In the manufacturing sector, automated production lines are increasingly reliant on high-precision, high-efficiency robots. In the service sector, scenarios such as logistics warehousing, healthcare, and home cleaning are creating an urgent need for intelligent auxiliary equipment. Meanwhile, extreme environment operations (such as nuclear radiation and deep-sea exploration) and public safety fields (such as rescue and patrol) are further expanding the application scenarios for robots. According to statistics from the International Federation of Robotics (IFR), the global industrial robot market has a compound annual growth rate of 8.7%, while the service robot market is growing at an even higher rate of 15%, demonstrating the strategic value of robotics technology in modern society.

[0003] However, existing robot systems still suffer from insufficient joint flexibility, which affects the usability of products in applications requiring high flexibility, such as humanoid robots, robotic dogs, and hexapod robots. Joints are crucial components connecting limbs and the torso. Traditional joints often employ rigid structures, such as a rotary table with connecting rods. The connecting rods are slidably connected to the rotary table, resulting in a high coefficient of sliding friction and limited rotational flexibility during movement. Utility Model Content

[0004] To improve joint flexibility, this application provides a ball joint bearing with rolling elements.

[0005] The ball joint bearing with rolling elements provided in this application adopts the following technical solution:

[0006] A ball joint bearing with rolling elements includes a ball seat, a cage, rolling elements, and a ball pin. One end of the ball seat is provided with a placement groove, the cage is connected to the groove wall of the placement groove, and the end of the cage away from the bottom of the placement groove is provided with a mounting groove. The rolling elements are rotatably connected to the cage, and the ball pin is disposed in the mounting groove and rotatably connected to the rolling elements.

[0007] By adopting the above technical solution, the cage supports the rolling elements, which can withstand the action of multidimensional forces, converting sliding friction into rolling friction, reducing motion friction, and increasing rotational flexibility.

[0008] Preferably, the retainer has a limiting opening, the limiting opening is connected to the mounting groove, and the rolling element is rotatably connected to the inner wall of the limiting opening.

[0009] By adopting the above technical solution, the limiting port limits the rolling elements, reducing the probability of the rolling elements falling off the cage and improving the stability of the spherical bearing.

[0010] Preferably, the limiting port includes an anti-detachment port and an assembly port, the two ends of the assembly port are respectively connected to the anti-detachment port and the mounting groove, the diameter of the anti-detachment port decreases as it moves away from the assembly port, and the diameter of the assembly port is equal to the ball diameter of the rolling element.

[0011] By adopting the above technical solution, the assembly port facilitates the installation of rolling elements, improves the assembly efficiency of rolling elements and cage, and the anti-disengagement port limits the rolling elements and prevents them from falling off.

[0012] Preferably, there are multiple limiting ports, which are evenly distributed on the cage, and there are multiple rolling elements, which are arranged in a one-to-one correspondence with the limiting ports.

[0013] By adopting the above technical solution, multiple rolling elements disperse the force of the ball joint pin, reduce friction, and improve the flexibility of the joint.

[0014] Preferably, the ball seat includes a first seat body and a second seat body, the first seat body being detachably connected to the second seat body; the placement groove includes a positioning groove and a positioning opening, the positioning groove being disposed on the first seat body and the positioning opening being disposed on the second seat body; the retainer includes a first frame body and a second frame body, the first frame body being disposed in the positioning groove and the second frame body being disposed in the positioning opening; the mounting groove includes an abutment groove and an abutment interface, the abutment groove being disposed on the first frame body and the abutment interface being disposed on the second frame body.

[0015] By adopting the above technical solution, the ball seat and cage are divided into two parts, which facilitates the installation of rolling elements and ball head pins and improves the overall assembly efficiency of the spherical plain bearing.

[0016] Preferably, it also includes a first bolt, and the first seat body has a connecting groove at one end away from the second seat body. The connecting groove is located on the outer periphery of the positioning groove. The bottom of the connecting groove has a first connecting port, and the second seat body has a second connecting port. The first connecting port and the second connecting port are coaxially arranged. The first connecting port communicates with the second connecting port. The first bolt passes through the first connecting port and is threaded to the inner wall of the second connecting port.

[0017] By adopting the above technical solution, it is easy to fix the first base and the second base, so that the first base and the second base are stably connected.

[0018] Preferably, it also includes a second bolt. The second seat body has a fixing groove at one end away from the first seat body. The fixing groove is located on the outer periphery of the positioning port. The bottom of the fixing groove has a first fixing port. The first seat body has a second fixing port. The first fixing port and the second fixing port are coaxially arranged. The first fixing port is connected to the second fixing port. The second bolt passes through the first fixing port and is threaded to the inner wall of the second fixing port.

[0019] By adopting the above technical solution, it is easy to fix the first base and the second base, so that the first base and the second base are stably connected.

[0020] Preferably, there are multiple fixing slots, which are evenly spaced around the axis of the positioning port; there are multiple second fixing ports, which correspond one-to-one with the fixing slots; and there are multiple second bolts, which correspond one-to-one with the fixing slots.

[0021] By adopting the above technical solution, multiple second bolts connect the first and second seats, improving the stability of the connection.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. The cage supports the rolling elements, which can withstand the action of multidimensional forces, converting sliding friction into rolling friction, reducing kinetic friction, and increasing rotational flexibility;

[0024] 2. The assembly port facilitates the installation of rolling elements, improving the assembly efficiency between the rolling elements and the cage; the anti-disengagement port limits the rolling elements and prevents them from falling off.

[0025] 3. The ball seat and cage are divided into two parts, which facilitates the installation of rolling elements and ball head pins and improves the overall assembly efficiency of the spherical plain bearing. Attached Figure Description

[0026] Figure 1 This is a cross-sectional view of a ball joint bearing with rolling elements.

[0027] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0028] Explanation of reference numerals in the attached drawings: 1. Ball seat; 11. Placement groove; 111. Positioning groove; 112. Positioning port; 12. First seat body; 121. Connecting groove; 122. First connecting port; 123. Second fixing port; 13. Second seat body; 131. Second connecting port; 132. Fixing groove; 133. First fixing port; 2. Cage; 21. Mounting groove; 211. Abutment groove; 212. Abutment interface; 22. Limiting port; 221. Anti-disengagement port; 222. Assembly port; 23. First frame body; 24. Second frame body; 3. Rolling element; 4. Ball head pin; 5. First bolt; 6. Second bolt. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0030] This application discloses a ball joint bearing with rolling elements. (See also...) Figure 1 A ball joint bearing with rolling elements includes a ball seat 1, a cage 2, rolling elements 3, a ball head pin 4, a first bolt 5, and a second bolt 6. One end of the ball seat 1 has a placement groove 11, and the cage 2 is fixedly connected to the groove wall of the placement groove 11. The end of the cage 2 facing away from the bottom of the placement groove 11 has a mounting groove 21. The rolling elements 3 are rotatably connected to the cage 2, and the ball head pin 4 is located in the mounting groove 21, rotatably connected to the rolling elements 3.

[0031] Reference Figure 2 The cage 2 is provided with a limiting port 22, which includes an anti-detachment port 221 and an assembly port 222. The two ends of the assembly port 222 are respectively connected to the anti-detachment port 221 and the mounting groove 21. The diameter of the anti-detachment port 221 decreases as it moves away from the assembly port 222. The diameter of the assembly port 222 is equal to the ball diameter of the rolling element 3. The rolling element 3 is attached to the inner wall of the anti-detachment port 221 and is tactilely connected to the inner wall of the limiting port 22. There are multiple limiting ports 22, which are evenly distributed on the cage 2. There are multiple rolling elements 3, and each rolling element 3 is arranged in a one-to-one correspondence with a limiting port 22.

[0032] Reference Figure 1 The ball seat 1 includes a first seat body 12 and a second seat body 13. The first seat body 12 is detachably connected to the second seat body 13. The placement groove 11 includes a positioning groove 111 and a positioning opening 112. The positioning groove 111 is located on the first seat body 12, and the positioning opening 112 is located on the second seat body 13. The positioning groove 111 is hemispherical in shape, and the diameter of the positioning opening 112 decreases as it moves away from the positioning groove 111. The maximum diameter of the positioning groove 111 is equal to the maximum diameter of the positioning opening 112.

[0033] The retainer 2 includes a first frame 23 and a second frame 24. The first frame 23 is fixedly connected to the groove wall of the positioning groove 111, and the outer wall of the first frame 23 is attached to the groove wall of the positioning groove 111. The second frame 24 is fixedly connected to the inner wall of the positioning port 112, and the outer wall of the second frame 24 is attached to the inner wall of the positioning port 112. The mounting groove 21 includes an abutment groove 211 and an abutment interface 212. The abutment groove 211 is provided on the first frame 23, and the abutment interface 212 is provided on the second frame 24. The abutment groove 211 is hemispherical in shape, and the diameter of the abutment interface 212 decreases as it moves away from the abutment groove 211. The maximum diameter of the abutment groove 211 is equal to the maximum diameter of the abutment interface 212.

[0034] Reference Figure 1 The first base 12 has a connecting groove 121 at one end opposite to the second base 13. The connecting groove 121 is located on the outer periphery of the positioning groove 111. The bottom of the connecting groove 121 has a first connecting port 122. The second base 13 has a second connecting port 131. The first connecting port 122 and the second connecting port 131 are coaxially arranged and the first connecting port 122 communicates with the second connecting port 131. The head of the first bolt 5 abuts against the bottom of the connecting groove 121, and the screw of the first bolt 5 passes through the first connecting port 122 and is threaded to the inner wall of the second connecting port 131. There are multiple connecting grooves 121, which are evenly spaced around the axis of the positioning groove 111. There are multiple second connecting ports 131, which are arranged one-to-one with the connecting grooves 121. There are multiple first bolts 5, which are arranged one-to-one with the positioning grooves 111.

[0035] The second base 13 has a fixing groove 132 at one end opposite to the first base 12. The fixing groove 132 is located on the outer periphery of the positioning port 112. The bottom of the fixing groove 132 has a first fixing port 133. The first base 12 has a second fixing port 123. The first fixing port 133 and the second fixing port 123 are coaxially arranged and the first fixing port 133 communicates with the second fixing port 123. The head of the second bolt 6 abuts against the bottom of the fixing groove 132, and the screw of the second bolt 6 passes through the first fixing port 133 and is threaded to the inner wall of the second fixing port 123. There are multiple fixing grooves 132, which are evenly spaced around the axis of the positioning port 112. There are multiple second fixing ports 123, which are arranged one-to-one with the fixing grooves 132. There are multiple second bolts 6, which are arranged one-to-one with the fixing grooves 132.

[0036] The implementation principle of a ball joint bearing with rolling elements in this application embodiment is as follows: the first frame 23 is embedded in the positioning groove 111, the second frame 24 is embedded in the positioning port 112, the rolling element 3 slides through the assembly port 222 and abuts against the inner wall of the anti-disengagement port 221, the ball head pin 4 is installed in the abutment port 212, the ball head pin 4 abuts against the rolling element 3, making it difficult for the rolling element 3 to disengage, the first seat 12 and the second seat 13 are assembled, the ball head pin 4 extends into the abutment groove 211, the ball head pin 4 abuts against the rolling element 3, the first bolt 5 and the second bolt 6 are installed, and the assembly is completed.

[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A ball joint bearing with rolling elements, characterized in that: The device includes a ball seat (1), a cage (2), a rolling element (3), and a ball head pin (4). One end of the ball seat (1) is provided with a placement groove (11). The cage (2) is connected to the groove wall of the placement groove (11). The end of the cage (2) away from the bottom of the placement groove (11) is provided with an installation groove (21). The rolling element (3) is rotatably connected to the cage (2). The ball head pin (4) is located in the installation groove (21) and is rotatably connected to the rolling element (3).

2. A ball joint bearing with rolling elements according to claim 1, characterized in that: The cage (2) is provided with a limiting port (22), which is connected to the mounting groove (21), and the rolling element (3) is rotatably connected to the inner wall of the limiting port (22).

3. A ball joint bearing with rolling elements according to claim 2, characterized in that: The limiting port (22) includes an anti-detachment port (221) and an assembly port (222). The two ends of the assembly port (222) are respectively connected to the anti-detachment port (221) and the mounting groove (21). The diameter of the anti-detachment port (221) decreases as it moves away from the assembly port (222). The diameter of the assembly port (222) is equal to the ball diameter of the rolling element (3).

4. A ball joint bearing with rolling elements according to claim 2, characterized in that: The limiting port (22) is provided in multiple ways, and the multiple limiting ports (22) are evenly distributed on the cage (2). The rolling body (3) is provided in multiple ways, and the rolling body (3) is set in a one-to-one correspondence with the limiting port (22).

5. A ball joint bearing with rolling elements according to claim 1, characterized in that: The ball seat (1) includes a first seat body (12) and a second seat body (13). The first seat body (12) is detachably connected to the second seat body (13). The placement groove (11) includes a positioning groove (111) and a positioning port (112). The positioning groove (111) is located on the first seat body (12), and the positioning port (112) is located on the second seat body (13). The retainer (2) includes a first frame (23) and a second frame (24). The first frame (23) is located in the positioning groove (111), and the second frame (24) is located in the positioning port (112). The mounting groove (21) includes an abutment groove (211) and an abutment interface (212). The abutment groove (211) is located on the first frame (23), and the abutment interface (212) is located on the second frame (24).

6. A ball joint bearing with rolling elements according to claim 5, characterized in that: It also includes a first bolt (5), and the first seat (12) is provided with a connecting groove (121) at one end away from the second seat (13). The connecting groove (121) is located on the outer periphery of the positioning groove (111). The bottom of the connecting groove (121) is provided with a first connecting port (122). The second seat (13) is provided with a second connecting port (131). The first connecting port (122) and the second connecting port (131) are coaxially arranged. The first connecting port (122) is connected to the second connecting port (131). The first bolt (5) passes through the first connecting port (122) and is threaded to the inner wall of the second connecting port (131).

7. A ball joint bearing with rolling elements according to claim 5, characterized in that: It also includes a second bolt (6), and the second seat (13) is provided with a fixing groove (132) at one end away from the first seat (12). The fixing groove (132) is located on the outer periphery of the positioning port (112). The bottom of the fixing groove (132) is provided with a first fixing port (133). The first seat (12) is provided with a second fixing port (123). The first fixing port (133) and the second fixing port (123) are coaxially arranged. The first fixing port (133) is connected to the second fixing port (123). The second bolt (6) passes through the first fixing port (133) and is threaded to the inner wall of the second fixing port (123).

8. A ball joint bearing with rolling elements according to claim 7, characterized in that: The fixing groove (132) is provided in multiple ways, and the multiple fixing grooves (132) are evenly spaced around the axis of the positioning port (112). The second fixing port (123) is provided in multiple ways, and the second fixing port (123) is provided in a one-to-one correspondence with the fixing groove (132). The second bolt (6) is provided in multiple ways, and the second bolt (6) is provided in a one-to-one correspondence with the fixing groove (132).

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