A mechanical arm joint bearing assembly
By introducing limiting strips and limiting grooves into the joint bearing assembly of the robotic arm, combined with the use of fixing bolts and sealing grooves, the problem of inconvenient installation and disassembly of conventional joint bearing assemblies of robotic arms is solved, achieving structural stability and convenience, and facilitating maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG QIRUI PRECISION MASCH CO LTD
- Filing Date
- 2025-09-03
- Publication Date
- 2026-07-21
AI Technical Summary
Conventional robotic arm joint bearing assemblies have complex structures, making installation and disassembly inconvenient and affecting maintenance efficiency.
A robotic arm joint bearing assembly including a first base component and a first bearing component was designed. By setting a limiting strip on the inner wall of the fixed ring seat and setting a limiting groove on the side of the robotic arm joint bearing body, and using the threaded connection of the fixing bolt and the combination bolt, convenient combination fixing and disassembly can be achieved. Combined with the design of the sealing groove and the sealing ring, the structural stability and sealing performance are ensured.
The stability and convenience of the robotic arm joint bearing assembly have been achieved, ensuring structural stability and sealing, facilitating maintenance operations, and improving maintenance efficiency.
Smart Images

Figure CN224527264U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of robotic arm technology, specifically to a robotic arm joint bearing assembly. Background Technology
[0002] A robotic arm is a multi-degree-of-freedom mechanical system that mimics the movements of a human arm. It is widely used in industries such as manufacturing, medicine, and aerospace, and can perform high-precision, high-intensity, or dangerous tasks. The joint bearing assembly of a robotic arm is a key component of an industrial robot robotic arm. It is a type of joint bearing and is mainly used to support and enable multi-directional movements such as rotation and swing of the joint.
[0003] Conventional spherical bearing assemblies are relatively complex in structure, and their installation or disassembly is time-consuming and labor-intensive, making maintenance operations inconvenient and affecting work efficiency. Summary of the Invention
[0004] The purpose of this invention is to provide a robotic arm joint bearing assembly to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a robotic arm joint bearing assembly, comprising a first base component and a first bearing component, wherein the first bearing component is embedded in the middle of the first base component, and a second base component is abutted to the bottom of the first base component, and a second bearing component is embedded in the middle of the second base component, and fixing bolts are threadedly installed between the first base component and the first bearing component, and between the second base component and the second bearing component. The first base component includes an assembly seat, a fixing ring seat, a limiting strip, and a fixing hole. The assembly base includes assembly holes, combination grooves, sealing grooves, combination pins, and combination insertion holes. A fixing ring seat is provided at the top center of the assembly base, and a limit strip is vertically provided on the inner wall surface of the fixing ring seat. A fixing hole is horizontally opened on the side of the fixing ring seat. Assembly holes are provided at the four opposite corners of the assembly base, and combination grooves are provided on the four sides of the assembly base. A sealing groove is provided on the surface of the assembly base away from the fixing ring seat, and a combination pin is provided on the surface of the assembly base away from the fixing ring seat. A combination insertion hole is also provided on the surface of the assembly base away from the fixing ring seat.
[0006] Furthermore, a combination block is embedded and installed on the side connection of the first base component and the second base component, and a combination bolt is installed on both the upper and lower ends of the combination block with a horizontal embedded thread. A sealing ring is embedded and installed between the connection of the first base component and the second base component.
[0007] Furthermore, the second base component and the first base component have essentially the same structure, and the second bearing component and the first bearing component have the same structure.
[0008] Furthermore, the mounting base and the fixing ring base are integrated into one structure, and the limiting strip and fixing holes are arranged in a ring array structure with the fixing ring base as the center and distributed in three sets. Moreover, the fixing bolt adopts an embedded structure and is threadedly installed inside the fixing hole.
[0009] Furthermore, the inner surface structure of the combined groove matches the outer surface structure of one end of the combined block and simultaneously has horizontally opened holes for threaded connection of the combined bolt, and the inner surface structure of the sealing groove matches the outer surface structure of the sealing ring.
[0010] Furthermore, the combined stakes and combined holes are both located on the side of the sealing groove near the center, and the combined stakes and combined holes are arranged in a circular array structure with the sealing groove as the center and are distributed in three groups. The combined stakes and combined holes between the second base component and the first base component are arranged in an interleaved structure.
[0011] Furthermore, the first bearing component includes a robotic arm joint bearing body, a docking hole, and a limiting groove. The robotic arm joint bearing body has a horizontally formed docking hole on its side and a vertically formed limiting groove on its side.
[0012] Furthermore, the fixing bolt is threaded into the interior of the mating hole, and the inner surface structure of the limiting groove matches the outer surface structure of the limiting strip.
[0013] This utility model provides a joint bearing assembly for a robotic arm, which has the following advantages: 1. In this utility model, since the first base component and the second base component have the same structure, a limiting strip is provided around the inner wall surface of the fixed ring seat, and a limiting groove is provided on the side of the main body of the robotic arm joint bearing. With this structure, when the first bearing component and the second bearing component are embedded and installed inside the fixed ring seat, the limiting groove and the limiting strip are slidably inserted. At the same time, the mating hole and the fixing hole are positioned opposite each other. The combination and fixation between the structures can be completed by simply screwing the fixing bolt into the fixing hole and the mating hole in sequence. With the above structure, on the one hand, the structural combination stability between the first base component and the first bearing component, and between the second base component and the second bearing component can be guaranteed as much as possible, avoiding unnecessary structural loosening and displacement problems. On the other hand, the above structure also makes the structure relatively easy to disassemble, thereby facilitating the operation of the structure maintenance by the operator and making the maintenance operation more time-saving and labor-saving.
[0014] This invention features combined inserts and combined holes on the surfaces of the first and second base components that meet, along with sealing grooves. When the first and second base components are joined, the combined inserts are inserted into the combined holes, and the sealing rings are embedded in the sealing grooves. This structure ensures structural stability and sealing at the joints of the first and second base components. Furthermore, four sets of combined blocks are individually embedded into the combined grooves on the sides of the first and second base components and screwed in with combined bolts, further securing the first and second base components and ensuring sufficient structural strength and stability. This design also facilitates disassembly and maintenance, making operation easier. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the main body axial side view of a mechanical arm joint bearing assembly according to the present invention; Figure 2 This is an exploded structural diagram of the main body of a robotic arm joint bearing assembly according to the present invention. Figure 3 This is a three-dimensional structural diagram of the first base component of a robotic arm joint bearing assembly according to the present invention. Figure 4 This is a three-dimensional structural diagram of the first bearing component of a robotic arm joint bearing assembly according to the present invention.
[0016] In the figure: 1. First base component; 101. Assembly seat; 102. Fixing ring seat; 103. Limiting strip; 104. Fixing hole; 105. Assembly hole; 106. Combination groove; 107. Sealing groove; 108. Combination stud; 109. Combination insertion hole; 2. First bearing component; 201. Main body of robotic arm joint bearing; 202. Docking hole; 203. Limiting groove; 3. Second base component; 4. Second bearing component; 5. Fixing bolt; 6. Combination block; 7. Combination bolt; 8. Sealing ring. Detailed Implementation
[0017] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.
[0018] like Figures 1 to 4As shown, a robotic arm joint bearing assembly includes a first base component 1 and a first bearing component 2. The first bearing component 2 is embedded in the middle of the first base component 1, and a second base component 3 is mated to the bottom of the first base component 1. A second bearing component 4 is embedded in the middle of the second base component 3. Fixing bolts 5 are threadedly installed between the first base component 1 and the first bearing component 2, and between the second base component 3 and the second bearing component 4. The first base component 1 includes an assembly seat 101, a fixing ring seat 102, and a limiting strip 1. 03. Fixing hole 104, assembly hole 105, combination groove 106, sealing groove 107, combination insert 108, and combination insertion hole 109. A fixing ring seat 102 is provided in the middle of the top of the assembly base 101, and a limit strip 103 is vertically provided on the inner wall surface of the fixing ring seat 102. Fixing holes 104 are horizontally opened on the side of the fixing ring seat 102. Assembly holes 105 are opened at the four opposite corners of the assembly base 101, and combination grooves 106 are opened on the four sides of the assembly base 101. The assembly base 101 is far away from the fixing ring seat 102. A sealing groove 107 is provided on one side of the mounting base 101, and a combined insert 108 is provided on the side of the mounting base 101 away from the fixing ring seat 102. A combined insertion hole 109 is also provided on the side of the mounting base 101 away from the fixing ring seat 102. The mounting base 101 and the fixing ring seat 102 are integrally formed. The limiting strip 103 and the fixing holes 104 are arranged in a circular array with the fixing ring seat 102 as the center, and are distributed in three sets. The fixing bolt 5 is threadedly installed inside the fixing hole 104 using an embedded structure. A limiting strip 103 is provided around the inner wall surface of the fixed ring seat 102, and a limiting groove 203 is provided on the side of the main body 201 of the robotic arm joint bearing. With this structure, when the first bearing component 2 and the second bearing component 4 are embedded and installed inside the fixed ring seat 102, the limiting groove 203 and the limiting strip 103 are slidably inserted. At the same time, the mating hole 202 and the fixing hole 104 are positioned opposite each other. The combination and fixation between the structures can be completed by simply screwing the fixing bolt 5 into the fixing hole 104 and the mating hole 202 in sequence.
[0019] like Figures 1 to 4As shown, a combination block 6 is embedded and installed on the side of the first base component 1 and the second base component 3, and a combination bolt 7 is horizontally embedded and threaded at both ends of the combination block 6. A sealing ring 8 is embedded and installed between the first base component 1 and the second base component 3. The second base component 3 and the first base component 1 have basically the same structure. The second bearing component 4 and the first bearing component 2 have the same structure. The inner surface structure of the combination groove 106 matches the outer surface structure of one end of the combination block 6 and is horizontally provided with a hole structure for threaded connection of the combination bolt 7. The inner surface structure of the sealing groove 107 matches the outer surface structure of the sealing ring 8. The combination stud 108 and the combination insertion hole 109 are both set on the side of the sealing groove 107 near the center. The combination stud 108 and the combination insertion hole 109 are arranged in a ring array structure with the sealing groove 107 as the center and are distributed in three groups. The combination stud 108 between the second base component 3 and the first base component 1... The 08 and the combination socket 109 are arranged in an interlocking structure. The first bearing component 2 includes a robotic arm joint bearing body 201, a docking hole 202, and a limiting groove 203. The robotic arm joint bearing body 201 has a horizontal docking hole 202 on its side and a vertical limiting groove 203 on its side. The fixing bolt 5 is threaded into the inside of the docking hole 202. The inner surface structure of the limiting groove 203 matches the outer surface structure of the limiting strip 103. When the first base component 1 and the second base component 3 are docked together, the combination plug 108 is inserted into the inside of the combination socket 109. At the same time, the sealing ring 8 is embedded into the inside of the sealing groove 107. In addition, four sets of combination blocks 6 are embedded one by one into the combination groove 106 on the side of the first base component 1 and the second base component 3, and the combination bolt 7 is screwed into them. Thus, the first base component 1 and the second base component 3 can be further combined and fixed.
[0020] In summary, as Figures 1 to 4 As shown, when using the robotic arm joint bearing assembly, the first bearing component 2 and the second bearing component 4 are first structurally aligned with the limiting groove 203 on the side surface and the limiting strip 103 on the inner wall surface of the fixing ring seat 102. The robotic arm joint bearing body 201 is tightly embedded into the interior of the fixing ring seat 102 by sliding insertion. Then, the three sets of fixing bolts 5 are screwed into the interior of the fixing hole 104 and the docking hole 202 after docking, thereby completing the combination and fixation between the first base component 1, the first bearing component 2, the second base component 3, and the second bearing component 4. Then, the first base component 1 and the second base component 3 are inserted and connected using the combination pins 108 and combination holes 109 on their respective sides. At the same time, the sealing ring 8 is embedded in the interior of the sealing groove 107. Finally, the combination block 6 is embedded in the combination groove 106 on the side of the connected first base component 1 and the second base component 3. Then, the combination bolts 7 are used to connect and fix them. The entire structure can be fixed to the installation structure surface using the assembly holes 105 at the four opposite corners of the mounting base 101 and the use of bolts.
[0021] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.
Claims
1. A robotic arm joint bearing assembly, comprising a first base component (1) and a first bearing component (2), characterized in that: A first bearing component (2) is embedded in the middle of the first base component (1), and a second base component (3) is connected to the bottom of the first base component (1). A second bearing component (4) is embedded in the middle of the second base component (3). Fixing bolts (5) are threaded between the first base component (1), the first bearing component (2), and between the second base component (3) and the second bearing component (4). The first base component (1) includes an assembly seat (101), a fixing ring seat (102), a limiting strip (103), a fixing hole (104), an assembly hole (105), a combination groove (106), a sealing groove (107), a combination insert (108), and a combination insertion hole (109). The assembly seat (101) A fixing ring seat (102) is provided at the top center of the assembly seat (101), and a limit strip (103) is provided vertically on the inner wall surface of the fixing ring seat (102). A fixing hole (104) is provided horizontally on the side of the fixing ring seat (102). An assembly hole (105) is provided at each of the four opposite corners of the assembly seat (101). A combination groove (106) is provided on each of the four sides of the assembly seat (101). A sealing groove (107) is provided on the side surface of the assembly seat (101) away from the fixing ring seat (102). A combination insert (108) is provided on the side surface of the assembly seat (101) away from the fixing ring seat (102). A combination insertion hole (109) is also provided on the side surface of the assembly seat (101) away from the fixing ring seat (102).
2. The robotic arm joint bearing assembly according to claim 1, characterized in that, The first base component (1) and the second base component (3) are connected and embedded with a combination block (6), and the upper and lower ends of the combination block (6) are both horizontally embedded with a combination bolt (7). A sealing ring (8) is embedded between the first base component (1) and the second base component (3).
3. The robotic arm joint bearing assembly according to claim 1, characterized in that, The second base component (3) and the first base component (1) have basically the same structure, and the second bearing component (4) and the first bearing component (2) have the same structure.
4. A robotic arm joint bearing assembly according to claim 1, characterized in that, The mounting base (101) and the fixing ring seat (102) are integrated into one structure. The limiting strip (103) and the fixing hole (104) are arranged in a ring array structure with the fixing ring seat (102) as the center and are distributed in three groups. The fixing bolt (5) is installed inside the fixing hole (104) with an embedded structure thread.
5. A robotic arm joint bearing assembly according to claim 2, characterized in that, The inner surface structure of the combined groove (106) matches the outer surface structure of one end of the combined block (6) and simultaneously has a hole structure for threaded connection of the combined bolt (7) horizontally. The inner surface structure of the sealing groove (107) matches the outer surface structure of the sealing ring (8).
6. A robotic arm joint bearing assembly according to claim 1, characterized in that, The combined stakes (108) and combined holes (109) are both located on the side of the sealing groove (107) near the center. The combined stakes (108) and combined holes (109) are arranged in a ring array structure with the sealing groove (107) as the center and are distributed in three groups. The combined stakes (108) and combined holes (109) between the second base component (3) and the first base component (1) are arranged in a staggered structure.
7. A robotic arm joint bearing assembly according to claim 1, characterized in that, The first bearing component (2) includes a robotic arm joint bearing body (201), a docking hole (202) and a limiting groove (203). The robotic arm joint bearing body (201) has a docking hole (202) horizontally opened on its side, and a limiting groove (203) vertically opened on its side.
8. A robotic arm joint bearing assembly according to claim 7, characterized in that, The fixing bolt (5) is threaded into the interior of the mating hole (202), and the inner surface structure of the limiting groove (203) matches the outer surface structure of the limiting strip (103).