Mechanical arm joint assembly

Abstract

The utility model relates to a mechanical arm joint assembly. According to the technical scheme, the mechanical arm comprises a mechanical arm tail end joint, the mechanical arm tail end joint comprises a U-shaped connecting piece, a groove is formed in the middle of the upper side wall of the U-shaped connecting piece, a cover plate is installed in the groove, a through hole is formed in the right rear corner of the cover plate, a limiting ring is fixedly connected to the plate wall of the lower portion of the through hole, an outer threaded pipe is fixedly connected to the plate wall of the upper portion of the through hole, and a cover is screwed on the outer threaded pipe. A corrugated extrusion bottle is movably inserted into the pipe wall of the lower portion of the cover, the lower end of the corrugated extrusion bottle is communicated with a guide pipe, the guide pipe is movably inserted into an opening in the rear end of an extrusion rod, the upper portion of the front end of the extrusion rod is fixedly connected with a guide column, and the lower portion of the front end of the extrusion rod is in extrusion contact with the right upper end of an eccentric wheel. A guide column above the spring movably penetrates through the right edge of the cover plate. The utility model has the beneficial effects that the structure does not need to be disassembled, maintenance and lubrication are convenient, and the use convenience is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of mechanical arm relates to a mechanical arm joint assembly. BACKGROUND

[0002] Mechanical arm is the high precision, multi -input and multi -output, highly nonlinear, strong coupling complex system. Because its unique operation flexibility, has obtained the wide application in the industrial assembly, safety explosion -proof etc., mechanical arm is a complex system, there is parameter perturbation, outside interference and unmodeled dynamic etc. Uncertainty. Thus the modeling model of mechanical arm also exists uncertainty, for different tasks, need to plan the motion trajectory of mechanical arm joint space, thereby concatenation constitutes the end pose. The end joint of existing six -axis mechanical arm, generally adopts the mechanical transmission of conical gear, the long -term occlusion rotation between two conical gears, very easy to cause its heat, thereby accelerate the evaporation of lubricating oil between the gear and become less, therefore, mechanical arm needs manual disassembly machine after a period of work, adds lubricating oil to the joint part and lubricates, to improve its service life. Manual disassembly maintenance process is more cumbersome, some parts are narrow, and it is inconvenient to smear the lubricating liquid on the corresponding part by manual, therefore, it is necessary to design the corresponding lubricating structure to realize the effective lubrication of the mechanical transmission part.

[0003] Therefore, the utility model provides a kind of mechanical arm joint assembly, solve above problems. UTILITY MODEL CONTENT

[0004] In view of the problems existing in the prior art, the utility model discloses a kind of mechanical arm joint assembly, the technical scheme adopted is, including mechanical arm end joint, the mechanical arm end joint includes U type connecting piece, the right end center hole rotation of the U type connecting piece Install shaft, the left end of the shaft is fixedly sleeved first conical gear, the rear side edge of the first conical gear is engaged with second conical gear tooth, the second conical gear is fixedly sleeved drive shaft, the front and rear ends of the drive shaft are respectively rotationally inserted in the front and rear side walls of the U type connecting piece, the shaft on the right side of the first conical gear is fixedly sleeved eccentric wheel, recess is set in the middle part of the upper side wall of the U type connecting piece, cover plate is installed in the recess, through hole is formed in the right rear corner of the cover plate, the plate wall of the lower part of the through hole is fixedly connected with limit ring, the plate wall of the upper part of the through hole is fixedly connected with outer screw pipe, the outer screw pipe is screwed with lid, corrugated extrusion bottle is movably inserted in the pipe wall of the lower part of the lid, the lower end of the corrugated extrusion bottle is communicated with catheter, the catheter is movably inserted in the rear end hole of extrusion rod, the front end upper part of the extrusion rod is fixedly connected with guide column, the front end lower part of the extrusion rod is extruded with the upper end of the eccentric wheel, spring is sleeved on the guide column, the guide column of the upper part of the spring is movably penetrated through the right side edge of the cover plate.

[0005] As a preferred embodiment of this utility model, the height of the limiting ring is one-fifth of the height of the corrugated extrusion bottle in its normal state; this design ensures that when the corrugated extrusion bottle is subjected to upward extrusion by the extrusion rod, the extrusion rod and the limiting ring will not interfere prematurely, thereby affecting the corrugated extrusion bottle from squeezing out the lubricating oil inside.

[0006] In a preferred embodiment of this utility model, an adjusting screw is screwed into the center opening of the cap. The upper end of the adjusting screw is fixedly connected to a handle, and the lower end of the adjusting screw is fixedly connected to a top plate. By rotating the handle, the adjusting screw is rotated, which in turn causes the top plate to move up and down at the bottom of the cap. When the meshing part between the first and second bevel gears is not lubricated, the top plate can be adjusted to a position close to the cap by using the handle and the adjusting screw. This provides space for the corrugated squeeze bottle to move upward when it is squeezed, preventing the lubricating oil from being squeezed out. When using lubricating oil for maintenance, the top plate can be moved downward, thereby blocking the upward movement of the corrugated squeeze bottle when it is squeezed, making it easier to squeeze out the lubricating oil inside.

[0007] In a preferred embodiment of this utility model, the lower end of the conduit is located directly above the meshing portion of the first bevel gear and the second bevel gear.

[0008] As a preferred embodiment of this utility model, a limiting nut is screwed onto one end of the guide post located on the upper part of the cover plate; by adjusting the limiting nut, it is convenient to adjust the distance between the bottom of the extrusion rod and the cover plate.

[0009] The beneficial effects of this utility model are as follows: When lubrication is required, the rotating handle can drive the adjusting screw to rotate, causing the top plate to move to the lower position. Then, the robotic arm can be adjusted so that the end joint of the robotic arm is in a horizontal state. Then, through system control, the drive shaft is driven to rotate, which drives the second bevel gear to rotate, and in turn drives the first bevel gear and the rotating shaft to rotate. The rotating shaft drives the eccentric wheel to rotate. During the rotation, the eccentric wheel periodically pushes the extrusion rod upward. The extrusion rod compresses the spring and moves upward. The other end of the extrusion rod squeezes the lubricating oil in the corrugated extrusion bottle to the meshing part between the first and second bevel gears, so that the dripping lubricating oil evenly covers the rotating gears. There is no need to disassemble the machine, thereby improving the convenience of lubrication. Attached Figure Description

[0010] Fig. 1 This is a schematic diagram of the overall structure of this utility model;

[0011] Fig. 2 This is a cross-sectional view of the overall structure of this utility model;

[0012] Fig. 3 This is a cross-sectional view of the end joint of the robotic arm of this utility model;

[0013] Fig. 4 This is a cross-sectional view of the cover plate of this utility model.

[0014] In the diagram: 1-End joint of robotic arm, 2-Cover plate, 3-Corrugated extrusion bottle, 4-Extrusion rod, 5-Guide post, 6-Spring, 11-U-shaped connector, 12-Rotating shaft, 13-First bevel gear, 14-Second bevel gear, 15-Drive shaft, 16-Eccentric wheel, 21-Through hole, 22-Limiting ring, 23-External threaded tube, 24-Cover, 25-Adjusting screw, 26-Handle, 27-Top plate, 31-Conduit, 51-Limiting nut. Detailed Implementation

[0015] Example 1

[0016] like Figs. 1 to 4 As shown, the present invention discloses a robotic arm joint assembly, the technical solution of which includes a robotic arm end joint 1. The robotic arm end joint 1 includes a U-shaped connector 11. A rotating shaft 12 is rotatably mounted in the center hole at the right end of the U-shaped connector 11. A first bevel gear 13 is fixedly mounted on the left end of the rotating shaft 12. The rear edge of the first bevel gear 13 meshes with the teeth of a second bevel gear 14. The second bevel gear 14 is fixedly mounted on a drive shaft 15. The front and rear ends of the drive shaft 15 are respectively rotatably inserted into the front and rear side walls of the U-shaped connector 11. An eccentric wheel 16 is fixedly mounted on the rotating shaft to the right of the first bevel gear 13. A groove 111 is formed in the middle of the upper side wall of the U-shaped connector 11. A cover plate 2 is installed in the groove 111. A through hole 21 is formed in the right rear corner of the cover plate 2. A limiting ring 22 is fixedly connected to the lower plate wall of the through hole 21. An external threaded tube 23 is fixedly connected to the upper plate wall of the through hole 21. 3. A cap 24 is screwed on, and an adjusting screw 25 is screwed into the center opening of the cap 24. The upper end of the adjusting screw 25 is fixedly connected to a handle 26, and the lower end of the adjusting screw 25 is fixedly connected to a top plate 27. A corrugated extrusion bottle 3 is movably inserted into the tube wall of the lower part of the cap 24. The height of the limiting ring 22 is one-fifth of the height of the corrugated extrusion bottle 3 in its normal state. The lower end of the corrugated extrusion bottle 3 is connected to a conduit 31. The lower end of the conduit 31 is located directly above the meshing part of the teeth of the first bevel gear 13 and the second bevel gear 14. The conduit 31 is movably inserted into the rear opening of the extrusion rod 4. A guide post 5 is fixedly connected to the upper front end of the extrusion rod 4. A limiting nut 51 is screwed onto one end of the guide post 5 located on the upper part of the cover plate 2. The lower front end of the extrusion rod 4 is in contact with the upper end of the eccentric wheel 16. A spring 6 is fitted on the guide post 5. The guide post above the spring 6 movably passes through the right edge of the cover plate 2.

[0017] The working principle of this utility model is as follows: When lubrication is required, rotating the handle 26 will drive the adjusting screw 25 to rotate, causing the top plate 27 to move to the lower position. Then, the robotic arm will be adjusted so that the end joint 1 of the robotic arm is in a horizontal state. Then, through system control, the drive shaft 15 will be driven to rotate, which will drive the second bevel gear 14 to rotate, which in turn will drive the first bevel gear 13 and the rotating shaft 12 to rotate. The rotating shaft 12 will drive the eccentric wheel 16 to rotate. During the rotation, the eccentric wheel 16 will periodically push the extrusion rod 4 upward. The extrusion rod 4 will compress the spring 6 and move upward. The other end presses the corrugated extrusion bottle 3 upward. The upward movement of the corrugated extrusion bottle 3 is blocked by the top plate 27. The lubricating oil in the corrugated extrusion bottle 3 is squeezed through the conduit 31 to the meshing part between the first bevel gear 13 and the second bevel gear 14, so that the dripping lubricating oil evenly covers the rotating first bevel gear 13 and the second bevel gear 14. After maintenance is completed, the handle 26 can be rotated again to move the top plate 27 to the upper position so that it no longer blocks the upward movement of the corrugated extrusion bottle 3, thereby preventing the lubricating oil in the corrugated extrusion bottle 3 from being squeezed out during the operation of the robotic arm.

[0018] Electrical connection methods or structures not described in detail in this article are existing technologies.

[0019] While the specific embodiments of this utility model have been described in detail above, this utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this utility model. Modifications or variations that do not involve creative labor are still within the protection scope of this utility model.

Claims

1. A robotic arm joint assembly, comprising a robotic arm end joint (1), the robotic arm end joint (1) comprising a U-shaped connector (11), a rotating shaft (12) being rotatably mounted in a central opening at the right end of the U-shaped connector (11), a first bevel gear (13) being fixedly fitted at the left end of the rotating shaft (12), the rear edge of the first bevel gear (13) meshing with the teeth of a second bevel gear (14), the second bevel gear (14) being fixedly fitted on a drive shaft (15), the front and rear ends of the drive shaft (15) being rotatably inserted into the front and rear sidewalls of the U-shaped connector (11), characterized in that: An eccentric wheel (16) is fixedly mounted on the shaft to the right of the first bevel gear (13). A groove (111) is opened in the middle of the upper side wall of the U-shaped connector (11). A cover plate (2) is installed in the groove (111). A through hole (21) is opened at the right rear corner of the cover plate (2). A limiting ring (22) is fixedly connected to the plate wall at the lower part of the through hole (21). An external threaded tube (23) is fixedly connected to the plate wall at the upper part of the through hole (21). A cover (24) is screwed onto the external threaded tube (23). 4) A corrugated squeeze bottle (3) is movably inserted into the lower tube wall. The lower end of the corrugated squeeze bottle (3) is connected to a conduit (31). The conduit (31) is movably inserted into the rear end opening of the squeeze rod (4). The upper part of the front end of the squeeze rod (4) is fixedly connected to a guide post (5). The lower part of the front end of the squeeze rod (4) is in contact with the upper end of the eccentric wheel (16). A spring (6) is mounted on the guide post (5). The guide post above the spring (6) movably passes through the right edge of the cover plate (2).

2. The robotic arm joint assembly according to claim 1, characterized in that: The height of the limiting ring (22) is one-fifth of the height of the corrugated extrusion bottle (3) under normal conditions.

3. A robotic arm joint assembly according to claim 1, characterized in that: An adjusting screw (25) is screwed into the center opening of the cover (24). The upper end of the adjusting screw (25) is fixedly connected to a handle (26), and the lower end of the adjusting screw (25) is fixedly connected to a top plate (27).

4. A robotic arm joint assembly according to claim 1, characterized in that: The lower end of the conduit (31) is located directly above the meshing part of the teeth of the first bevel gear (13) and the second bevel gear (14).

5. A robotic arm joint assembly according to claim 1, characterized in that: The guide post (5) is fitted with a limiting nut (51) at one end located on the upper part of the cover plate (2).

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