Self-lubricating robot hand

Abstract

The utility model discloses a kind of self-lubricating mechanical hands, including first supporting arm, second supporting arm and the shaft rod and bearing of both movable connections. Lubricating assembly and self-oil supply assembly are installed on first supporting arm. Lubricating assembly includes bottom plate and lubricating plate with oil inlet pipe, first oil groove and second oil groove, bottom plate is sealingly connected with lubricating plate, and second oil groove is in sliding contact with second supporting arm. Self-oil supply assembly includes shell, pressure tank and built-in elastic oil storage inner bag, which is connected to oil inlet pipe through oil delivery pipe with first electric valve. Three-way pipe and oil filler pipe with second electric valve are provided on oil delivery pipe. Two electric valves are connected with external controller through terminal seat. The utility model can realize automatic oil supply lubrication, reduce maintenance time, improve production efficiency, and can conveniently supplement lubricating oil through oil filler pipe.

Description

Technical Field

[0001] This utility model belongs to the field of robotic arm technology, specifically relating to a self-lubricating robotic arm. Background Technology

[0002] A robotic arm, also known as a robotic arm or industrial robot, is a key execution unit in the field of industrial automation. It consists of multiple joints and drive mechanisms working together to replicate the complex trajectories of a human arm and perform tasks such as grasping, assembly, and painting. To ensure that the joints do not fail due to friction during long-term, high-frequency operation, a continuous supply of lubricating oil film is necessary.

[0003] However, existing production lines still generally rely on manual oil replenishment. Once the robotic arm stops, the entire production line becomes out of sync, affecting the overall production efficiency.

[0004] Chinese utility model patent CN222858058U discloses a self-lubricating robotic arm, relating to the field of robotic arms. This self-lubricating robotic arm includes a first robotic arm with a rotating shaft at its side end. A second robotic arm is connected to the side end of the rotating shaft. An oil outlet is provided inside the first robotic arm, and a lubricating oil pipe is provided at its outer end. A lubricating oil tank is connected to the side end of the first robotic arm, and a push plate is slidably connected inside the lubricating oil tank. By incorporating a servo motor, controller, lubricating oil tank, and rangefinder, lubricating oil is automatically added to the joint connecting the first and second robotic arms after they have operated for a certain period. This not only reduces labor costs and potential risks associated with manual operation, but also allows the robotic arms to work more efficiently without stopping, thereby improving overall production efficiency. However, its structure is relatively complex. Utility Model Content

[0005] The purpose of this invention is to provide a self-lubricating robotic arm to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a self-lubricating manipulator, comprising a first arm with a shaft, the shaft being movably connected to a second arm via a bearing; the first arm being fixedly mounted with a lubrication assembly and a self-supplying oil assembly; the lubrication assembly comprising a base plate and a lubrication plate, the base plate being sealed to the lubrication plate via a sealing gasket; the lubrication plate being slidably connected to the second arm; the lubrication plate having an oil inlet pipe, a first oil groove, and a second oil groove; the oil inlet pipe communicating with the first oil groove; the first oil groove communicating with the second oil groove via an oil hole; the self-supplying oil assembly comprising a housing and a pressure tank; an elastic oil storage liner fixedly connected inside the pressure tank; the elastic oil storage liner being connected to the oil inlet pipe via an oil delivery pipe; the oil delivery pipe being fixedly mounted with a first electric valve and a three-way pipe; the three-way pipe being fixedly connected with a refueling pipe; the refueling pipe being fixedly mounted with a second electric valve; a terminal block fixedly mounted on the side wall of the housing; the terminal block being electrically connected to the first electric valve via a first wire; and the terminal block being electrically connected to the second electric valve via a second wire.

[0007] Preferably, the lubrication plate is arranged in a ring array with multiple branch oil grooves, and the branch oil grooves are connected to the second oil groove.

[0008] Preferably, the pressure tank is provided with a pressurization pipe, and a one-way valve is fixedly installed on the pressurization pipe.

[0009] Preferably, the material of the elastic oil storage liner is chloroprene rubber.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] The first support arm of this utility model is fixedly equipped with a lubrication assembly and a self-supplying oil assembly. The lubrication assembly includes a base plate and a lubrication plate. The lubrication plate is provided with an oil inlet pipe, a first oil groove, and a second oil groove. The first oil groove and the second oil groove are respectively arranged on both sides of the lubrication plate. The base plate and the first oil groove cooperate to form a sealed pipe. The lubrication plate is slidably connected to the second support arm. The second oil groove is located between the lubrication plate and the second support arm to facilitate oil supply and lubrication of the contact surface between the second support arm and the lubrication plate. The self-supplying oil assembly includes a shell and a pressure tank. An elastic oil storage liner is fixedly connected inside the pressure tank. The elastic oil storage liner is connected to the oil inlet pipe through an oil delivery pipe. The oil delivery pipe is fixedly equipped with... The first electric valve, with compressed gas in the pressure tank, acts on the surface of the elastic oil reservoir, providing contractile force to the elastic oil reservoir. The elastic oil reservoir contains lubricating oil. The first electric valve is electrically connected to the terminal block via the first wire. In application, the controller is electrically connected to the terminal block, and the self-lubricating function is achieved by controlling the opening and closing of the first electric valve. The lubricating oil in the elastic oil reservoir is supplied to the contact surface between the second arm and the lubrication plate through the oil supply path of oil delivery pipe-oil inlet pipe-first oil groove-oil hole-second oil groove. By automatically lubricating the robot, the maintenance time of the robot is shortened and the production efficiency is improved.

[0012] The present invention has a T-shaped pipe fixedly installed on the oil delivery pipe, which is fixedly connected to a refueling pipe. The refueling pipe is fixedly installed with a second electric valve, which is electrically connected to a terminal block via a second wire. In application, the controller is electrically connected to the terminal block. When adding lubricating oil, the controller controls the first electric valve to close and the second electric valve to open, so that lubricating oil is added to the elastic oil storage tank through the refueling pipe. At the same time, the elastic oil storage tank compresses the air inside the pressure tank, which facilitates the elastic oil storage tank to squeeze out the lubricating oil. Attached Figure Description

[0013] Figure 1 This is a structural view of the present invention.

[0014] Figure 2 This is an exploded structural view of the present invention.

[0015] Figure 3 This is an internal structural view of the self-supplying oil assembly of this utility model.

[0016] Figure 4 This is a cross-sectional structural view of the pressure tank of this utility model.

[0017] Figure 5 This is the first perspective structural view of the lubrication plate of this utility model.

[0018] Figure 6 This is a second perspective structural view of the lubrication plate of this utility model.

[0019] The diagram is labeled as follows: 1. First support arm; 2. Shaft; 3. Bearing; 4. Second support arm; 5. Lubrication assembly; 6. Self-supplying oil assembly; 7. Base plate; 8. Lubrication plate; 9. Sealing gasket; 10. Oil inlet pipe; 11. First oil tank; 12. Second oil tank; 13. Oil hole; 14. Outer shell; 15. Pressure tank; 16. Elastic oil storage liner; 17. Oil delivery pipe; 18. First electric valve; 19. T-connector; 20. Oil filling pipe; 21. Second electric valve; 22. Terminal block; 23. First wire; 24. Second wire; 25. Branch oil tank; 26. Pressurization pipe; 27. Check valve. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1:

[0022] This utility model provides a self-lubricating manipulator, comprising a first arm 1, which has a shaft 2. The shaft 2 is movably connected to a second arm 4 via a bearing 3. The first arm 1 is fixedly equipped with a lubrication assembly 5 and a self-supplying oil assembly 6. The lubrication assembly 5 includes a base plate 7 and a lubrication plate 8. The base plate 7 is sealed to the lubrication plate 8 via a sealing gasket 9. The lubrication plate 8 is slidably connected to the second arm 4. The lubrication plate 8 has an oil inlet pipe 10, a first oil groove 11, and a second oil groove 12. The oil inlet pipe 10 communicates with the first oil groove 11, and the first oil groove 11 is connected to the second oil groove 12 via an oil hole 13. The self-supplying oil assembly 6 includes a housing 14 and a pressure tank 15. An elastic oil storage liner 16 is fixedly connected inside the pressure tank 15. The elastic oil storage liner 16 is connected to the oil inlet pipe 10 via an oil supply pipe 17. A first electric valve 18 and a three-way pipe 19 are fixedly installed on the oil supply pipe 17. A refueling pipe 20 is fixedly connected to the three-way pipe 19. A second electric valve 21 is fixedly installed on the refueling pipe 20. A terminal block 22 is fixedly installed on the side wall of the housing 14. The terminal block 22 is electrically connected to the first electric valve 18 via a first wire 23 and to the second electric valve 21 via a second wire 24. The lubrication plate 8 has multiple branch oil grooves 25 arranged in a ring array, and the branch oil grooves 25 communicate with the second oil groove 12. The pressure tank 15 has a pressurization pipe 26, and a one-way valve 27 is fixedly installed on the pressurization pipe 26. The elastic oil storage liner 16 is made of polyvinyl chloride rubber.

[0023] Through the above technical solution, the first support arm 1 of this utility model is fixedly equipped with a lubrication assembly 5 and a self-supplying oil assembly 6. The lubrication assembly 5 includes a base plate 7 and a lubrication plate 8. The lubrication plate 8 is provided with an oil inlet pipe 10, a first oil groove 11 and a second oil groove 12. The first oil groove 11 and the second oil groove 12 are respectively arranged on both sides of the lubrication plate 8. The base plate 7 and the first oil groove 11 cooperate to form a sealed pipe. The lubrication plate 8 is slidably connected to the second support arm 4. The second oil groove 12 is located between the lubrication plate 8 and the second support arm 4 to facilitate oil supply and lubrication of the contact surface between the second support arm 4 and the lubrication plate 8. The self-supplying oil assembly 6 includes a shell 14 and a pressure tank 15. An elastic oil storage liner 16 is fixedly connected inside the pressure tank 15. The elastic oil storage liner 16 is connected to the oil inlet pipe 10 through an oil supply pipe 17. The oil supply pipe 17 is fixedly equipped with a first electric valve 18. The pressure tank 15 contains compressed gas, which acts on the surface of the elastic oil storage liner 16, providing the elastic oil storage liner 16 with a contraction force. The elastic oil storage liner 16 contains lubricating oil. The first electric valve 18 is electrically connected to the terminal block 22 through the first wire 23. In application, the controller is electrically connected to the terminal block 22. By controlling the opening and closing of the first electric valve 18, the self-lubricating function is achieved. The lubricating oil in the elastic oil storage liner 16 is supplied to the contact surface between the second support arm 4 and the lubrication plate 8 through the oil supply path of oil supply pipe 17-oil inlet pipe 10-first oil groove 11-oil hole 13-second oil groove 12. By automatically lubricating the robot, the maintenance time of the robot is shortened and the production efficiency is improved.

[0024] The oil supply pipe 17 of this utility model is fixedly installed with a three-way pipe 19, and the three-way pipe 19 is fixedly connected to a refueling pipe 20. The refueling pipe 20 is fixedly installed with a second electric valve 21. The second electric valve 21 is electrically connected to the terminal block 22 through a second wire 24. In application, the controller is electrically connected to the terminal block 22. When adding lubricating oil, the controller controls the first electric valve 18 to close and the second electric valve 21 to open, so that lubricating oil is added to the elastic oil storage tank 16 through the refueling pipe 20. At the same time, the elastic oil storage tank 16 compresses the air inside the pressure tank 15, so that the elastic oil storage tank 16 can squeeze out the lubricating oil.

[0025] Example 2:

[0026] In this embodiment, the first support arm 1 is provided with a shaft 2, and the shaft 2 is movably connected to the second support arm 4 through a bearing 3. The first support arm 1 is fixedly installed with a lubrication assembly 5 and a self-supplying oil assembly 6. The lubrication assembly 5 includes a base plate 7 and a lubrication plate 8. The base plate 7 is sealed to the lubrication plate 8 through a sealing gasket 9. The lubrication plate 8 is slidably connected to the second support arm 4. The lubrication plate 8 is provided with an oil inlet pipe 10, a first oil groove 11 and a second oil groove 12. The oil inlet pipe 10 is connected to the first oil groove 11, and the first oil groove 11 is connected to the second oil groove 12 through an oil hole 13. The self-supplying oil assembly 6 includes a housing 14 and a pressure tank 15. An elastic oil storage liner 16 is fixedly connected inside the pressure tank 15. The elastic oil storage liner 16 is connected to the oil inlet pipe 10 through an oil supply pipe 17. A first electric valve 18 and a three-way pipe 19 are fixedly installed on the oil supply pipe 17. A refueling pipe 20 is fixedly connected to the three-way pipe 19. A second electric valve 21 is fixedly installed on the refueling pipe 20. A terminal block 22 is fixedly installed on the side wall of the housing 14. The terminal block 22 is electrically connected to the first electric valve 18 through a first wire 23. The terminal block 22 is electrically connected to the second electric valve 21 through a second wire 24.

[0027] In this embodiment, the lubrication assembly 5 and the self-supplying oil assembly 6 work together to achieve automatic lubrication. The base plate 7 of the lubrication plate 8 and the lubrication plate 8 form a sealing structure through the sealing gasket 9 to ensure that the lubricating oil does not leak. The sliding connection surface between the lubrication plate 8 and the second support arm 4 is lubricated through the second oil groove 12. The lubricating oil enters the first oil groove 11 from the oil inlet pipe 10 and then flows into the second oil groove 12 through the oil hole 13, thereby forming a lubricating film between the second support arm 4 and the lubrication plate 8, reducing friction and wear. The pressure tank 15 of the self-supplying oil assembly 6 contains compressed gas, which acts on the surface of the elastic oil storage liner 16, providing a continuous contraction force so that the lubricating oil can be stably squeezed out. The elastic oil storage liner 16 is connected to the oil inlet pipe 10 of the lubrication plate 8 through the oil delivery pipe 17, and the first electric valve 18 on the oil delivery pipe 17 controls the flow of lubricating oil. When lubrication is required, the external controller sends a signal through terminal block 22 to open the first electric valve 18. Under pressure, the lubricating oil flows along the path of oil delivery pipe 17, oil inlet pipe 10, first oil groove 11, oil hole 13, and second oil groove 12, eventually reaching the lubrication contact surface to achieve automatic lubrication. This design avoids manual intervention and improves the operating efficiency and reliability of the robot.

[0028] The self-supplying oil assembly 6 also includes a refueling function, achieved through a three-way pipe 19 and a refueling pipe 20. A second solenoid valve 21 is installed on the refueling pipe 20. When lubricating oil needs to be added, an external controller controls the first solenoid valve 18 to close and the second solenoid valve 21 to open via a terminal block 22. Lubricating oil is then injected into the elastic oil reservoir 16 through the refueling pipe 20. During injection, the elastic oil reservoir 16 expands, compressing the air in the pressure tank 15, creating back pressure, which facilitates the expulsion of lubricating oil during subsequent lubrication. This self-supplying oil mechanism ensures a continuous supply of lubricating oil without requiring downtime for maintenance, further improving production efficiency. The entire system is compact, easy to operate, and suitable for long-term, high-frequency operation in industrial automation environments.

[0029] Example 3:

[0030] In this embodiment, the lubrication plate 8 is arranged in a ring array with multiple branch oil grooves 25, which are interconnected with the second oil groove 12. The lubrication plate 8 is fixedly mounted on the first support arm 1 and forms a sealing structure through the base plate 7 and the sealing gasket 9 to ensure that the lubricating oil does not leak. The lubrication plate 8 slides in contact with the second support arm 4, providing lubrication support during the movement of the robot arm.

[0031] The second oil groove 12 is located on the side of the lubrication plate 8 facing the second support arm 4. The lubricating oil stored inside diffuses outward through multiple branch oil grooves 25. The branch oil grooves 25 are evenly distributed in a ring shape with the center of the lubrication plate 8 as the reference, and each branch oil groove 25 extends outward from the peripheral area of ​​the second oil groove 12, covering a larger area of ​​contact between the lubrication plate 8 and the second support arm 4. This design allows the lubricating oil to be distributed more evenly to all parts of the sliding interface, reducing the risk of local dry friction.

[0032] When the self-supplying oil assembly 6 starts working, the elastic oil storage liner 16 inside the pressure tank 15 is subjected to compressed gas, which delivers lubricating oil through the oil supply pipe 17 and the first electric valve 18 to the oil inlet pipe 10 of the lubrication plate 8. The lubricating oil first enters the first oil groove 11, and then flows into the second oil groove 12 through the oil hole 13. Since the branch oil grooves 25 are directly connected to the second oil groove 12, the lubricating oil quickly enters each branch oil groove 25 from the second oil groove 12 and flows along the path of the branch oil grooves 25 towards the outer edge of the lubrication plate 8.

[0033] The annular array layout of the branch oil grooves 25 ensures a wider coverage of lubricating oil on the sliding interface, maintaining a stable lubricating film even under high-speed or high-frequency motion of the robot. This structure improves lubrication efficiency, reduces frictional loss, and extends the service life of the robot. At the same time, the design of the branch oil grooves 25 avoids the problem of localized lubricating oil accumulation or uneven distribution, resulting in a more uniform and reliable lubrication effect.

[0034] The self-supplying oil assembly 6 operates the first solenoid valve 18 and the second solenoid valve 21 via a controller to achieve automatic supply and replenishment of lubricating oil. When lubricating oil needs to be added, the controller closes the first solenoid valve 18 and opens the second solenoid valve 21, injecting new oil into the elastic oil reservoir 16 through the filling pipe 20. The elastic oil reservoir 16 contracts under the action of compressed gas, storing pressure for subsequent lubrication operations.

[0035] Throughout this embodiment, the introduction of the branched oil grooves 25 significantly improves the performance of the lubrication system. Its annular array structure not only optimizes the flow path of the lubricating oil but also enhances the robot's adaptability to complex movements. Through this design, the self-lubricating robot can continuously and efficiently complete lubrication tasks without human intervention, thereby improving production efficiency and equipment reliability.

[0036] Example 4:

[0037] In this embodiment, the first arm 1 is equipped with a shaft 2, which is movably connected to the second arm 4 via a bearing 3, allowing the second arm 4 to rotate relative to the first arm 1 and perform various manipulator tasks. The first arm 1 is fixedly equipped with a lubrication assembly 5 and a self-supplying oil assembly 6. The lubrication assembly 5 includes a base plate 7 and a lubrication plate 8. The base plate 7 is sealed to the lubrication plate 8 via a sealing gasket 9 to ensure the sealing of the lubricating oil and prevent leakage. The lubrication plate 8 is slidably connected to the second arm 4 to meet the lubrication needs of the second arm 4 during movement. The lubrication plate 8 is provided with an oil inlet pipe 10, a first oil groove 11, and a second oil groove 12. The oil inlet pipe 10 communicates with the first oil groove 11, and the first oil groove 11 communicates with the second oil groove 12 via an oil hole 13, forming a flow path for the lubricating oil. The self-supplying oil assembly 6 includes a housing 14 and a pressure tank 15. An elastic oil storage liner 16 is fixedly connected inside the pressure tank 15, and the elastic oil storage liner 16 is connected to the oil inlet pipe 10 of the lubrication plate 8 via an oil supply pipe 17. A first electric valve 18 and a tee pipe 19 are fixedly installed on the oil supply pipe 17. The tee pipe 19 is fixedly connected to the refueling pipe 20, and a second electric valve 21 is fixedly installed on the refueling pipe 20. A terminal block 22 is fixedly installed on the side wall of the housing 14. The terminal block 22 is electrically connected to the first electric valve 18 through a first wire 23 and to the second electric valve 21 through a second wire 24, which facilitates the control of the electric valves by an external controller.

[0038] In this embodiment, the pressure tank 15 is equipped with a pressurizing pipe 26, and a one-way valve 27 is fixedly installed on the pressurizing pipe 26. One end of the pressurizing pipe 26 is connected to the interior of the pressure tank 15, and the other end is used to connect to an external gas source, allowing high-pressure gas to be injected into the pressure tank 15 through the pressurizing pipe 26. After the high-pressure gas enters the pressure tank 15, it acts on the outer surface of the elastic oil storage liner 16, providing pressure and causing the elastic oil storage liner 16 to contract, thereby squeezing out the lubricating oil stored inside. The one-way valve 27 is installed on the pressurizing pipe 26 to ensure that gas can only enter the pressure tank 15 from the outside and cannot leak back, maintaining a stable gas pressure inside the pressure tank 15 and ensuring a continuous supply of lubricating oil. This design simplifies the pressure maintenance mechanism, avoids complex mechanical structures, and improves the reliability and ease of maintenance of the system.

[0039] In terms of working principle, when the robot arm is running, the external controller sends a signal through terminal block 22 to control the opening of the first solenoid valve 18 and the closing of the second solenoid valve 21. High-pressure gas in the pressure tank 15 is introduced through the pressurization pipe 26. The gas pressure acts on the elastic oil reservoir 16, causing it to contract. Lubricating oil flows from the elastic oil reservoir 16 through the oil supply pipe 17 to the oil inlet pipe 10 of the lubrication plate 8. After entering the first oil groove 11, the lubricating oil flows into the second oil groove 12 through the oil hole 13, ultimately lubricating the sliding contact surface between the second arm 4 and the lubrication plate 8, reducing friction and wear, and ensuring smooth movement of the robot arm joints. After lubrication is complete, the controller closes the first solenoid valve 18, stopping the oil supply. When lubricating oil needs to be added, the controller controls the first solenoid valve 18 to close and the second solenoid valve 21 to open, adding new lubricating oil to the elastic oil reservoir 16 through the oil filling pipe 20. Simultaneously, the elastic oil reservoir 16 expands, compressing the air in the pressure tank 15, preparing for the next oil supply. The addition of the pressurization pipe 26 and the one-way valve 27 enables the pressure tank 15 to be quickly filled with high-pressure gas, improving the oil supply efficiency and preventing gas leakage, thus ensuring the long-term stable operation of the system.

[0040] This embodiment optimizes the oil supply pressure control of the self-lubricating robot by implementing the pressure pipe 26 and the one-way valve 27, avoiding manual intervention and realizing fully automatic lubrication. It is suitable for high-frequency, long-term industrial operation environments and significantly improves production efficiency and equipment life.

[0041] Example 5:

[0042] In this embodiment, the first arm 1 is provided with a shaft 2, which is movably connected to the second arm 4 through a bearing 3 to realize the joint movement of the manipulator. A lubrication assembly 5 and a self-supplying oil assembly 6 are fixedly installed on the first arm 1. The lubrication assembly 5 includes a base plate 7 and a lubrication plate 8. The base plate 7 is sealed to the lubrication plate 8 through a sealing gasket 9 to ensure the airtightness of the oil circuit system. The lubrication plate 8 is slidably connected to the second arm 4 to facilitate lubrication during movement. The lubrication plate 8 is provided with an oil inlet pipe 10, a first oil groove 11, and a second oil groove 12. The oil inlet pipe 10 communicates with the first oil groove 11, and the first oil groove 11 communicates with the second oil groove 12 through an oil hole 13, forming a flow path for lubricating oil from the inlet to the lubrication surface. The self-supplying oil assembly 6 includes a housing 14 and a pressure tank 15. An elastic oil storage liner 16 is fixedly connected inside the pressure tank 15, and the elastic oil storage liner 16 is connected to the oil inlet pipe 10 through an oil supply pipe 17. A first solenoid valve 18 and a tee pipe 19 are fixedly installed on the oil supply pipe 17. The tee pipe 19 is fixedly connected to a refueling pipe 20, and a second solenoid valve 21 is fixedly installed on the refueling pipe 20. A terminal block 22 is fixedly installed on the side wall of the housing 14. The terminal block 22 is electrically connected to the first solenoid valve 18 via a first wire 23 and to the second solenoid valve 21 via a second wire 24. In application, an external controller is electrically connected to the terminal block 22 to achieve remote control of the solenoid valves.

[0043] In this embodiment, the elastic oil reservoir 16 is made of polyvinyl chloride (PVC) rubber. PLC is a synthetic rubber material with excellent elasticity, oil resistance, and compression set resistance. In the self-lubricating assembly 6, the elastic oil reservoir 16 stores lubricating oil and relies on the compressed gas in the pressure tank 15 to provide contractile force to squeeze out the lubricating oil. The high elasticity of PLC ensures that the reservoir maintains its shape stability during repeated compression and rebound, avoiding uneven oil supply or leakage due to fatigue deformation. Its oil resistance ensures that the reservoir remains in contact with lubricating oil for a long time without swelling or degradation, extending its service life. In addition, PLC has good aging resistance and temperature adaptability, ensuring that the self-lubricating system can still operate reliably under harsh conditions.

[0044] The self-lubricating robotic arm works as follows: When the robotic arm joints move, the controller sends a signal through terminal block 22 to open the first electric valve 18 and close the second electric valve 21. Compressed gas in pressure tank 15 applies pressure to the elastic oil reservoir 16, forcing the reservoir to contract and delivering the stored lubricating oil through oil supply pipe 17 to oil inlet pipe 10. After entering the first oil tank 11, the lubricating oil flows into the second oil tank 12 through oil hole 13, ultimately lubricating the sliding contact surface between the second arm 4 and the lubrication plate 8, reducing friction and wear, and ensuring smooth operation of the robotic arm. The oil supply process is automatic, requiring no manual intervention, thus avoiding production line downtime and improving production efficiency.

[0045] When lubricating oil needs to be added, the controller closes the first solenoid valve 18 and opens the second solenoid valve 21 via terminal block 22. New lubricating oil is then injected into the elastic oil reservoir 16 through the filling pipe 20. During this process, the chloroprene rubber material of the elastic oil reservoir 16 exhibits good flexibility and resilience, able to withstand the injection pressure of the lubricating oil and gradually expand, while simultaneously compressing the air in the pressure tank 15, storing energy for subsequent oil supply. After adding the oil, the second solenoid valve 21 is closed, and the system returns to standby mode. The entire adding process is simple and quick, and does not affect the normal operation of the robotic arm.

[0046] This embodiment improves the reliability and durability of the self-lubricating system by using polyvinyl chloride (PVC) rubber as the material for the elastic oil reservoir 16. The physical and chemical properties of PPC rubber perfectly match the lubrication requirements of the robotic arm, ensuring a long-term stable supply of lubricating oil, reducing maintenance frequency, and ultimately achieving efficient automated operation of the robotic arm.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0048] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A self-lubricating robotic arm, comprising a first arm, the first arm having a shaft, the shaft being movably connected to a second arm via a bearing, characterized in that, The first support arm is fixedly equipped with a lubrication assembly and a self-supplying oil assembly. The lubrication assembly includes a base plate and a lubrication plate. The base plate is sealed to the lubrication plate through a sealing gasket. The lubrication plate is slidably connected to the second support arm. The lubrication plate is provided with an oil inlet pipe, a first oil groove, and a second oil groove. The oil inlet pipe communicates with the first oil groove, and the first oil groove communicates with the second oil groove through an oil hole. The self-supplying oil assembly includes a housing and a pressure tank. An elastic oil storage liner is fixedly connected inside the pressure tank. The elastic oil storage liner is connected to the oil inlet pipe through an oil delivery pipe. A first electric valve and a three-way pipe are fixedly installed on the oil delivery pipe. A refueling pipe is fixedly connected to the three-way pipe. A second electric valve is fixedly installed on the refueling pipe. A terminal block is fixedly installed on the side wall of the housing. The terminal block is electrically connected to the first electric valve through a first wire, and the terminal block is electrically connected to the second electric valve through a second wire.

2. The self-lubricating robotic arm according to claim 1, characterized in that, The lubrication plate is arranged in a ring array with multiple branch oil grooves, and the branch oil grooves are connected to the second oil groove.

3. The self-lubricating robotic arm according to claim 1, characterized in that, The pressure tank is equipped with a pressurization pipe, and a one-way valve is fixedly installed on the pressurization pipe.

4. A self-lubricating robotic arm according to claim 1, characterized in that, The elastic oil storage liner is made of chloroprene rubber.

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