A thin-walled angular contact ball bearing for industrial robots

Abstract

This invention discloses a thin-walled angular contact ball bearing for industrial robots, relating to the technical field of thin-walled angular contact ball bearings. It includes an outer ring, with an inner ring disposed on the inner surface of the outer ring. Multiple balls are arranged in a circular array between the outer and inner rings. An automatic spraying and replenishing mechanism and a self-adjusting angle lubrication mechanism are disposed inside the outer ring. This thin-walled angular contact ball bearing for industrial robots, by incorporating the automatic spraying and replenishing mechanism and the self-adjusting angle lubrication mechanism, allows the adjusting block and spraying tube to rotate around a pivot axis. The spraying angle dynamically adjusts according to the direction of the balls, ensuring that the lubricating oil is always aligned with the contact surface between the balls and the outer ring raceway. This solves the problems of existing thin-walled angular contact ball bearings where the spraying tube is fixed, leading to repeated spraying of the same area and easy oil accumulation, and the inability to accurately cover the contact surface between the balls and the outer ring raceway with sprayed lubricating oil, resulting in oil splashing and loss, thus reducing lubrication efficiency.

Description

Technical Field

[0001] This invention relates to the field of thin-walled angular contact ball bearing technology, specifically a thin-walled angular contact ball bearing for industrial robots. Background Technology

[0002] In the field of industrial automation, industrial robots are being used more and more widely. The joints of industrial robots need to perform frequent rotation and swinging movements, which places extremely high demands on the bearings used in the joints.

[0003] Thin-walled angular contact ball bearings are precision mechanical components that transform the sliding friction between a rotating shaft and its housing into rolling friction, thereby reducing frictional losses. Rolling bearings generally consist of four parts: an inner ring, an outer ring, rolling elements, and a cage. The inner ring mates with the shaft and rotates with it. The outer ring mates with the bearing housing and provides support. The rolling elements are evenly distributed between the inner and outer rings by the cage. Their shape, size, and number directly affect the performance and lifespan of the rolling bearing. The cage ensures even distribution of the rolling elements, guides their rotation, and provides lubrication.

[0004] For example, a thin-walled angular contact ball bearing with rapid lubrication, as described in the Chinese announcement number CN222479254U, states that "this utility model belongs to the technical field of thin-walled angular contact ball bearings, specifically a thin-walled angular contact ball bearing with rapid lubrication, including a bearing assembly. The bearing assembly includes an outer ring, and a lubrication assembly is fixedly connected inside the outer ring. The upper and lower ends of the inner wall of the outer ring are provided with snap-fit ​​components. The lubrication assembly includes six sets of piston cylinders fixedly connected inside the outer ring. A piston is slidably connected to the inner wall of the six sets of piston cylinders. A piston rod is welded to one side of the piston, and a spring is sleeved on the surface of the piston rod."

[0005] However, the existing devices have the following shortcomings during use:

[0006] Existing thin-walled angular contact ball bearings reduce the bearing friction coefficient and extend service life. At the same time, the rotation of the balls enables self-lubrication, eliminating the need for manual spraying. When the ball is released from the ball's compression, the piston is reset by the reaction force of the spring. Under the action of the one-way plate, lubricating oil can be effectively drawn into the oil reservoir through the oil extraction pipe. However, the spraying pipe is fixed, which makes it easy for oil to accumulate due to repeated spraying of the same area. Furthermore, the sprayed lubricating oil cannot accurately cover the contact surface between the ball and the outer raceway, and the oil is prone to splashing and loss, resulting in reduced lubrication efficiency.

[0007] Therefore, we propose a thin-walled angular contact ball bearing specifically for industrial robots to address the problems mentioned in the background section. Summary of the Invention

[0008] The purpose of this invention is to provide a thin-walled angular contact ball bearing for industrial robots. When the inner ring rotates, it drives the balls to rotate. The balls contact the ball body during rotation, and the ball body moves into the interior of the connecting groove under force. This causes the moving rod to move into the interior of the connecting groove and drive the L-shaped frame to slide. The connecting rod pushes the turntable and the rotating shaft to rotate, so that the adjusting block and the spraying pipe rotate around the rotating shaft. The spraying angle is dynamically adjusted according to the direction of the balls, thereby solving the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a thin-walled angular contact ball bearing for industrial robots, comprising an outer ring, an inner ring disposed on the inner surface of the outer ring, a plurality of balls arranged in a circular array between the outer ring and the inner ring, an automatic spraying and replenishing mechanism and a self-adjusting angle lubrication mechanism disposed inside the outer ring, and dustproof and waterproof mechanisms disposed at the top and bottom of the outer ring.

[0010] The automatic spraying and replenishing mechanism includes five connecting grooves on the inner surface of the outer ring, five spheres slidably connected in the five connecting grooves, and five movable rods fixedly connected to the outer surface of the five spheres.

[0011] The self-adjusting angle lubrication mechanism includes five mounting slots inside the outer ring. Five sliding grooves, communicating with five connecting slots, are formed on the inner sides of the five mounting slots. Five sliding rods are slidably connected within the five sliding grooves. One end of each sliding rod is fixedly connected to five L-shaped brackets, and the other end is fixedly connected to five moving rods. Five rotating shafts are rotatably connected to the inner sides of the five mounting slots. Five turntables are fixedly connected to the top ends of each rotating shaft. Five connecting rods are hinged between each turntable and each L-shaped bracket. Five adjusting blocks are fixedly fitted onto the outer surfaces of each rotating shaft, and five spray nozzles are installed on one side of each adjusting block.

[0012] Preferably, the automatic spraying and replenishing mechanism further includes five piston cylinders fixedly connected to the inside of the outer ring, five piston plates slidably connected inside the five piston cylinders, five piston rods fixedly connected to one end of each of the five piston plates, five first return springs fixedly connected to the inner side of each of the five piston cylinders, one end of each of the five first return springs fixedly connected to the five piston plates, and the five first return springs sleeved on the outer surface of the five piston rods, one end of each of the five piston rods movably passing through the five piston cylinders and five connecting grooves and fixedly connected to five first wedge blocks, and one end of each of the five moving rods fixedly connected to five second wedge blocks.

[0013] Preferably, the outer ring has an annular oil reservoir inside, and the tops of the five piston cylinders are fixedly connected to five oil extraction pipes. The ends of the five oil extraction pipes away from the five piston cylinders are connected to the inside of the annular oil reservoir. The top of the outer ring has an oil injection hole connected to the annular oil reservoir, and a sealing plug is provided in the oil injection hole.

[0014] Preferably, the outer surfaces of the five piston cylinders are fixedly connected to five conveying pipes. The ends of the five conveying pipes away from the five piston cylinders pass through five mounting slots and are fixedly connected to five telescopic pipes. The ends of the five telescopic pipes away from the five conveying pipes pass through five adjusting blocks and are connected to the interior of the five spraying pipes. One-way plates are provided at the connection points of the five piston cylinders, five oil extraction pipes, five conveying pipes, five telescopic pipes and five spraying pipes.

[0015] Preferably, five support blocks are fixedly connected to the inner side of the five mounting slots, and the five support blocks are sleeved on the outer surface of the five conveying pipes. Two first limiting slots are opened on the inner side of each of the five connecting slots. A first limiting block is slidably connected to the inner side of each of the two first limiting slots, and the first limiting block is fixedly connected to the piston rod.

[0016] Preferably, the self-adjusting angle lubrication mechanism further includes five through slots opened inside the five mounting slots, the five spray pipes are slidably connected to the five through slots, and two support telescopic rods are fixedly connected to the inner side of each of the five mounting slots, and the telescopic ends of the support telescopic rods are fixedly connected to the L-shaped frame.

[0017] Preferably, the dustproof and waterproof mechanism includes two grooves formed on the top of the outer ring, two movable blocks slidably connected in the two grooves, two third wedge blocks fixedly connected to one side of the two movable blocks, two second return springs and two third return springs fixedly connected to the inner side of the two grooves, one end of the two second return springs fixedly connected to the two movable blocks, and one end of the two third return springs fixedly connected to two ejector plates.

[0018] Preferably, a dustproof plate is provided between the outer ring and the inner ring, and two extrusion blocks are fixedly connected to the outer surface of the dustproof plate.

[0019] Preferably, four second limiting grooves and four third limiting grooves are provided on the inner side of the two grooves. Four second limiting blocks are slidably connected in the four second limiting grooves and are fixedly connected to the two pop-out plates. Four third limiting blocks are slidably connected in the four third limiting grooves and are fixedly connected to the two moving blocks.

[0020] Preferably, the outer surfaces of the plurality of balls are provided with a plurality of connecting frames rotatably connected to the outer surface of the inner ring, and the plurality of balls are slidably connected to the outer ring.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. This invention, by setting up an automatic spraying and replenishing mechanism and a self-adjusting angle lubrication mechanism, ensures that when the inner ring rotates, it drives the ball bearing to rotate. The ball bearing contacts the ball during rotation, and the ball bearing is forced to move inwards towards the connecting groove. This causes the moving rod to move inwards towards the connecting groove and drives the L-shaped frame to slide. The connecting rod then pushes the turntable and the rotating shaft to rotate, causing the adjusting block and the spraying pipe to rotate around the rotating shaft. This allows the spraying angle to be dynamically adjusted according to the direction of the ball bearing, ensuring that the lubricating oil is always aligned with the contact surface between the ball bearing and the outer ring raceway. This solves the problems of existing thin-walled angular contact ball bearings where the spraying pipe is fixed, leading to repeated spraying of the same area and easy oil accumulation. Furthermore, the sprayed lubricating oil cannot accurately cover the contact surface between the ball bearing and the outer ring raceway, causing oil to splash and leak, thus reducing lubrication efficiency.

[0023] 2. This invention features an automatic spraying and replenishment mechanism. When the ball bearing rotates and squeezes the ball, causing the moving rod to move, the moving rod drives the second wedge block to push the first wedge block, which in turn stretches the first return spring inside the piston cylinder. The piston plate squeezes lubricating oil, which flows through the delivery pipe and telescopic pipe to the spraying pipe. When the piston plate is pressurized and discharges the lubricating oil, the spring returns to its original position, and the piston cylinder draws lubricating oil from the annular oil reservoir through the oil extraction pipe, forming a circulation. The annular oil reservoir can be replenished with lubricating oil through the oil injection hole. The sealing plug ensures sealing, and the one-way plate ensures unidirectional oil flow, preventing backflow. This achieves automated continuous operation of the lubrication system, reduces manual maintenance costs, and extends the bearing's service life. Furthermore, the coordinated operation of the moving rod, the second wedge block, and the first wedge block facilitates continuous and stable driving of the piston plate to squeeze lubricating oil, achieving the extraction and spraying circulation of lubricating oil and providing stable lubrication for the bearing.

[0024] 3. This invention utilizes a dustproof and waterproof mechanism. The pressing block on the outer surface of the dustproof plate aligns with the groove at the top of the outer ring and presses the dustproof plate. This causes the third wedge block to move under the pressure of the pressing block, sliding within the groove and compressing the second return spring. Simultaneously, the ejector plate is compressed, and the third return spring contracts accordingly. When the pressing block reaches its target, the second return spring releases its elasticity, pushing the moving block back to its original position. The third wedge block then re-locks the top of the pressing block, effectively limiting and fixing the dustproof plate. When disassembling the dustproof plate, pulling the moving block overcomes the elasticity of the second return spring and slides it to one side. The third wedge block disengages from the limiting position of the pressing block. At this point, the compressed third return spring quickly releases its elasticity, pushing the ejector plate upwards and ejecting the pressing block and dustproof plate together. This allows for rapid disassembly of the dustproof plate, effectively preventing external dust, moisture, and other impurities from entering the bearing. Furthermore, the dynamic buffering and adaptive adjustment of the spring maintain a continuous sealing effect, providing protection for the core components inside the bearing, such as the balls and inner and outer rings. Attached Figure Description

[0025] Figure 1 This is a perspective view of the main structure of a thin-walled angular contact ball bearing for industrial robots according to the present invention;

[0026] Figure 2 This is a three-dimensional view of the inner ring structure of a thin-walled angular contact ball bearing for industrial robots according to the present invention.

[0027] Figure 3 This is a three-dimensional view of the outer ring structure of a thin-walled angular contact ball bearing for industrial robots according to the present invention.

[0028] Figure 4 This is a three-dimensional view of the dustproof plate in a thin-walled angular contact ball bearing for industrial robots according to the present invention.

[0029] Figure 5 This is a three-dimensional view of the ball structure in a thin-walled angular contact ball bearing for industrial robots according to the present invention.

[0030] Figure 6 This is a three-dimensional cross-sectional view of the outer ring of a thin-walled angular contact ball bearing for industrial robots according to the present invention.

[0031] Figure 7 This is a three-dimensional view of the through groove structure of a thin-walled angular contact ball bearing for industrial robots according to the present invention;

[0032] Figure 8 for Figure 2 Enlarged 3D view of the structure at point A in the middle;

[0033] Figure 9 for Figure 2 Enlarged 3D view of the structure at point B in the middle;

[0034] Figure 10 for Figure 5 Enlarged 3D view of the structure at point C.

[0035] In the diagram: 1. Outer ring; 2. Inner ring; 3. Ball bearing; 4. Automatic spraying and replenishing mechanism; 401. Connecting groove; 402. Ball; 403. Moving rod; 404. Piston cylinder; 405. Piston plate; 406. Piston rod; 407. First return spring; 408. First wedge block; 409. Second wedge block; 410. Annular oil reservoir; 411. Oil suction pipe; 412. Oil injection hole; 413. Sealing plug; 414. Delivery pipe; 415. Telescopic pipe; 416. Support block; 417. First limiting groove; 418. First limiting block; 5. Self-adjusting angle lubrication mechanism; 501. Mounting groove 502. Slide groove; 503. Slide rod; 504. L-shaped frame; 505. Rotating shaft; 506. Turntable; 507. Connecting rod; 508. Adjusting block; 509. Through groove; 510. Support telescopic rod; 511. Spray pipe; 6. Dustproof and waterproof mechanism; 601. Groove; 602. Moving block; 603. Third wedge block; 604. Second return spring; 605. Third return spring; 606. Pop-out plate; 607. Dustproof plate; 608. Extrusion block; 609. Second limiting groove; 610. Second limiting block; 611. Third limiting groove; 612. Third limiting block; 7. Connecting frame. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] like Figure 1 - Figure 10 As shown, the present invention provides a technical solution: a thin-walled angular contact ball bearing for industrial robots, including an outer ring 1, an inner ring 2 disposed on the inner surface of the outer ring 1, a plurality of balls 3 arranged in a circular shaft array between the outer ring 1 and the inner ring 2, an automatic spraying and replenishing mechanism 4 and a self-adjusting angle lubrication mechanism 5 disposed inside the outer ring 1, and a dustproof and waterproof mechanism 6 disposed at the top and bottom of the outer ring 1.

[0038] The automatic spraying and replenishing mechanism 4 includes five connecting grooves 401 opened on the inner surface of the outer ring 1, five balls 402 are slidably connected in the five connecting grooves 401, and five moving rods 403 are fixedly connected to the outer surface of the five balls 402.

[0039] The self-adjusting angle lubrication mechanism 5 includes five mounting slots 501 inside the outer ring 1. The inner side of the five mounting slots 501 is provided with five sliding grooves 502 that communicate with five connecting slots 401. Five sliding rods 503 are slidably connected in the five sliding grooves 502. One end of the five sliding rods 503 is fixedly connected to five L-shaped brackets 504. The other end of the five sliding rods 503 is fixedly connected to five moving rods 403. Five rotating shafts 505 are rotatably connected to the inner side of the five mounting slots 501. Five turntables 506 are fixedly connected to the top of the five rotating shafts 505. Five connecting rods 507 are hinged between the five turntables 506 and the five L-shaped brackets 504. Five adjusting blocks 508 are fixedly sleeved on the outer surface of the five rotating shafts 505. Five spray pipes 511 are installed on one side of the five adjusting blocks 508.

[0040] like Figure 1 and Figure 10 As shown, the automatic spraying and replenishing mechanism 4 also includes five piston cylinders 404 fixedly connected inside the outer ring 1. Five piston plates 405 are slidably connected inside the five piston cylinders 404. Five piston rods 406 are fixedly connected to one end of each piston plate 405. Five first return springs 407 are fixedly connected to the inner side of each piston cylinder 404. One end of each first return spring 407 is fixedly connected to the five piston plates 405 and sleeved on the outer surface of each piston rod 406. One end of each piston rod 406 movably passes through the five piston cylinders 404 and five connecting grooves 401 and is fixedly connected to five first wedge blocks 408. One end of each moving rod 403 is fixedly connected to five second wedge blocks 409. The first return springs 408... The cooperation between the piston plate 405 and piston rod 406 and the ball bearing 3 enables automatic extraction and extrusion spraying of lubricating oil. When the ball bearing 3 rotates and extrudes the ball 402, driving the moving rod 403 to move, the second wedge block 409 pushes the first wedge block 408, causing the piston rod 406 to stretch the first return spring 407. The piston plate 405 extrudes lubricating oil, which flows through the delivery pipe 414 to the spraying pipe 511. At the same time, through the rotation of the ball bearing 3, when the spring returns to its original position, the piston cylinder 404 extracts lubricating oil from the annular oil reservoir 410 through the oil extraction pipe 411, forming a circulation. This structural design ensures a continuous supply of lubricating oil without frequent manual intervention, reducing maintenance costs. It also ensures stable lubrication of the bearing during long-term operation, extending the bearing's service life.

[0041] like Figure 1 , Figure 6 and Figure 10As shown, an annular oil reservoir 410 is provided inside the outer ring 1. Five oil suction pipes 411 are fixedly connected to the top of the five piston cylinders 404. The ends of the five oil suction pipes 411 away from the five piston cylinders 404 are connected to the interior of the annular oil reservoir 410. An oil filling hole 412 connected to the annular oil reservoir 410 is provided at the top of the outer ring 1. A sealing plug 413 is provided in the oil filling hole 412. The annular oil reservoir 410 serves as a storage space for lubricating oil, which can hold more lubricating oil and reduce the frequency of oiling. The oil suction pipes 411 connect the annular oil reservoir 410 to the piston cylinders 404, ensuring that the circulation path of the lubricating oil is unobstructed. The oil filling hole 412 facilitates the replenishment of lubricating oil, while the sealing plug 413 effectively prevents external dust and impurities from entering the oil reservoir, ensuring the cleanliness of the lubricating oil and avoiding bearing wear caused by impurities. This further improves the operating stability and service life of the bearing.

[0042] like Figure 1 , Figure 7 and Figure 10 As shown, five piston cylinders 404 are fixedly connected to five conveying pipes 414 on their outer surfaces. The ends of the five conveying pipes 414 away from the five piston cylinders 404 pass through five mounting slots 501 and are fixedly connected to five telescopic pipes 415. The ends of the five telescopic pipes 415 away from the five conveying pipes 414 pass through five adjusting blocks 508 and are connected to the interior of five spraying pipes 511. One-way plates are provided at the connection points of the five piston cylinders 404, five oil extraction pipes 411, five conveying pipes 414, five telescopic pipes 415 and five spraying pipes 511. The setting of the telescopic pipes 415 ensures that the oil delivery is not affected when the spraying pipes 511 are rotated to adjust the angle, thus ensuring the continuity of lubrication. The setting of the one-way plates ensures that the oil can only flow in one direction, preventing the lubricating oil from flowing back, ensuring the effectiveness of the piston cylinders 404 in drawing and squeezing the lubricating oil, avoiding the waste of lubricating oil and improving the efficiency of lubrication work.

[0043] like Figure 1 and Figure 10As shown, five support blocks 416 are fixedly connected to the inner side of the five mounting slots 501, and the five support blocks 416 are sleeved on the outer surface of the five conveying pipes 414. Two first limiting slots 417 are opened on the inner side of each of the five connecting slots 401. A first limiting block 418 is slidably connected to the inner side of each of the two first limiting slots 417, and the first limiting block 418 is fixedly connected to the piston rod 406. The support blocks 416 support and fix the conveying pipes 414, preventing the conveying pipes 414 from shifting or deforming due to vibration and other factors during bearing operation, thus ensuring the stability of oil delivery. The cooperation of the first limiting slots 417 and the first limiting blocks 418 limits and guides the movement of the piston rod 406, ensuring that the piston rod 406 can only move in a specified direction and range, thus ensuring the accuracy and stability of the piston plate 405's squeezing and extracting of lubricating oil, and further improving the reliability of the automatic spraying and replenishing mechanism 4.

[0044] like Figure 1 , Figure 7 and Figure 10 As shown, the self-adjusting angle lubrication mechanism 5 also includes five through slots 509 formed inside the five mounting slots 501. The five spray pipes 511 are slidably connected to the five through slots 509. Two support telescopic rods 510 are fixedly connected to the inner side of each of the five mounting slots 501, and the telescopic ends of the support telescopic rods 510 are fixedly connected to the L-shaped frame 504. The through slots 509 provide a space for the rotation of the spray pipes 511, ensuring that the spray pipes 511 can flexibly adjust the spray angle with the rotating shaft 505 as the center, so that the lubricating oil is always aligned with the contact surface between the ball 3 and the raceway of the outer ring 1. The support telescopic rods 510 provide support and buffer for the L-shaped frame 504. When the L-shaped frame 504 slides with the moving rod 403, the support telescopic rods 510 can absorb some vibration and impact, reduce wear between components, and ensure the smooth movement of the L-shaped frame 504, thereby ensuring the accuracy and reliability of the angle adjustment of the spray pipes 511.

[0045] like Figure 1 , Figure 3 , Figure 4 and Figure 8As shown, the dustproof and waterproof mechanism 6 includes two grooves 601 formed on the top of the outer ring 1. Two movable blocks 602 are slidably connected within the two grooves 601. Two third wedge blocks 603 are fixedly connected to one side of each movable block 602. Two second return springs 604 and two third return springs 605 are fixedly connected to the inner sides of the two grooves 601. One end of each second return spring 604 is fixedly connected to the two movable blocks 602, and one end of each third return spring 605 is fixedly connected to two ejector plates 606. Through the cooperation of the third wedge block 603 and the pressing block 608, the dustproof plate 607 is quickly installed and fixed. When the dustproof plate 607 is installed, the pressing block 608 pushes the third wedge block 603 to compress the movable block 602. The return spring 604, after returning to its original position, locks the pressing block 608, thus securing the dust cover 607. During disassembly, pulling the moving block 602 overcomes the elastic force of the second return spring 604, causing the third wedge block 603 to disengage from the pressing block 608. The third return spring 605 then quickly releases its elastic force, pushing the ejector plate 606 to eject the dust cover 607. This process is convenient and quick. The design of the second and third return springs 604 and 605 not only enables rapid installation and removal of the dust cover 607 but also effectively absorbs external impact forces during bearing operation through the elastic buffering of the springs. This maintains a tight fit between the dust cover 607 and the outer ring 1, enhancing the dustproof and waterproof effect and preventing external dust, moisture, and other impurities from entering the bearing, thus protecting the core components of the bearing.

[0046] like Figure 1 , Figure 2 and Figure 8 As shown, a dustproof plate 607 is provided between the outer ring 1 and the inner ring 2. Two pressing blocks 608 are fixedly connected to the outer surface of the dustproof plate 607. The dustproof plate 607 can directly block external dust, moisture and other impurities from entering the bearing, thus protecting the core components such as the balls 3, inner ring 2 and outer ring 1. The pressing blocks 608 cooperate with the wedge blocks and springs in the dustproof and waterproof mechanism 6 to realize the convenient installation and removal of the dustproof plate 607, which facilitates the maintenance and inspection of the bearing. At the same time, after installation, it can ensure that the dustproof plate 607 can stably perform its dustproof and waterproof function, improving the adaptability and reliability of the bearing in harsh working environments.

[0047] like Figure 1 , Figure 8 and Figure 9As shown, four second limiting grooves 609 and four third limiting grooves 611 are provided on the inner side of the two grooves 601. Four second limiting blocks 610 are slidably connected in the four second limiting grooves 609, and the four second limiting blocks 610 are fixedly connected to the two pop-up plates 606. Four third limiting blocks 612 are slidably connected in the four third limiting grooves 611, and the four third limiting blocks 612 are fixedly connected to the two moving blocks 602. The second limiting grooves 609 and the second limiting blocks 610 limit and guide the movement of the pop-up plates 606, ensuring that the pop-up plates... Under the action of the spring, the dustproof plate 607 can be accurately ejected and maintain a stable position when not in use, preventing the ejector plate 606 from moving at will. The third limiting groove 611 and the third limiting block 612 play the same limiting and guiding role for the moving block 602, ensuring that the moving block 602 moves along the specified direction during the installation and removal of the dustproof plate 607, so that the third wedge block 603 and the pressing block 608 can accurately cooperate, improving the accuracy and stability of the dustproof and waterproof mechanism 6, and further enhancing the reliability of the installation and removal of the dustproof plate 607.

[0048] like Figure 1 and Figure 2 As shown, multiple connecting frames 7 are rotatably connected to the outer surface of the inner ring 2 on the outer surface of the multiple balls 3. The multiple balls 3 are slidably connected to the outer ring 1. The connecting frames 7 connect the balls 3 to the inner ring 2, so that the balls 3 can be evenly distributed between the inner ring 2 and the outer ring 1, ensuring the stability and synchronization of the balls 3 during rotation. At the same time, the connecting frames 7 also provide a certain support and guidance for the balls 3, reducing the shaking and offset of the balls 3 during operation, improving the rotational accuracy and load-bearing capacity of the bearing, and ensuring the smoothness and accuracy of the joint movement of the industrial robot.

[0049] The usage and working principle of this device are as follows: During the dustproof installation stage, align the two pressing blocks 608 on the outer surface of the dustproof plate 607 with the two grooves 601 on the top of the outer ring 1, and slowly press down on the dustproof plate 607. Under the push of the pressing blocks 608, the third wedge block 603 drives the moving block 602 to slide in the grooves 601, compressing the second return spring 604, so that the two pressing blocks 608 on the outer surface of the dustproof plate 607 enter the two grooves 601. When the pressing blocks 608 move to the target position, the second return spring 604 releases its elastic force, pushing the moving block 602... When the moving block 602 resets, the third wedge block 603 re-locks the top of the pressing block 608, completing the installation and fixation of the dustproof plate 607. When it is necessary to remove the dustproof plate 607, pull the moving block 602 to make it slide to one side against the elastic force of the second reset spring 604. The third wedge block 603 disengages from the limiting position of the pressing block 608. At this time, the third reset spring 605, which is in a compressed state, quickly releases its elastic force, pushing the ejector plate 606 to move upward, ejecting the pressing block 608 and the dustproof plate 607 together, so that the dustproof plate 607 can be quickly removed.

[0050] During the bearing installation stage, the inner ring 2 is assembled with the joint axis of the industrial robot to ensure that the inner ring 2 fits tightly with the axis. It can be fixed by appropriate interference fit or key connection to ensure that the two rotate synchronously. The outer ring 1 is then installed into the corresponding bearing housing.

[0051] During the automatic spraying and lubrication stage, when the industrial robot's joints move, the inner ring 2 rotates. The inner ring 2 drives the ball bearing 3 to roll on the raceway between the inner and outer rings 1. During the rolling process, the ball bearing 3 contacts and compresses the ball body 402. After being subjected to force, the ball body 402 moves into the connecting groove 401, causing the moving rod 403 to move synchronously. The second wedge block 409 on the moving rod 403 pushes the first wedge block 408, which in turn causes the piston rod 406 to stretch the first return spring 407 inside the piston cylinder 404, causing the piston plate 405 to move inside the piston cylinder 404 and compress the lubricating oil inside the piston cylinder 404. Under pressure, the compressed lubricating oil passes through the delivery pipe 414 and the telescopic pipe 415 in sequence. The lubricating oil flows to the spray pipe 511 and is eventually sprayed out. When the piston plate 405 is pressurized and discharges the lubricating oil, the first return spring 407 returns to its original position, causing the piston plate 405 to move in the opposite direction. At this time, the piston cylinder 404 draws lubricating oil from the annular oil reservoir 410 through the oil extraction pipe 411 to replenish the lubricating oil in the piston cylinder 404, forming a circulating supply of lubricating oil. This ensures that the bearing is always lubricated during operation. Since one-way plates are installed at the connection points of the five piston cylinders 404, five oil extraction pipes 411, five delivery pipes 414, five telescopic pipes 415, and five spray pipes 511, these one-way plates ensure that the lubricating oil can only flow in the set direction, preventing backflow of lubricating oil. To ensure the normal operation of the automatic spraying and replenishment process, while the ball bearing 3 rotates and squeezes the ball 402, causing the moving rod 403 to move, the moving rod 403 also drives the slide rod 503, which is fixedly connected to it, to slide within the slide groove 502. The slide rod 503 then drives the L-shaped frame 504 to move. The L-shaped frame 504 is hinged to the turntable 506 via the connecting rod 507. The movement of the L-shaped frame 504 will push the turntable 506 to rotate, and the turntable 506 will drive the rotating shaft 505 to rotate. The adjusting block 508, which is fixedly sleeved on the outer surface of the rotating shaft 505, is connected to the spraying pipe 511. As the rotating shaft 505 rotates, the adjusting block 508 and the spraying pipe 511 rotate around the rotating shaft 505, thereby adjusting the spraying angle of the spraying pipe 511. As the ball bearing 3 is dynamically adjusted, the lubricating oil sprayed from the spray pipe 511 is always precisely aligned with the contact surface between the ball bearing 3 and the raceway of the outer ring 1. When the ball bearing 3 leaves the contact area of ​​the ball 402, the first return spring 407 resets and drives the piston rod 406 to move in the opposite direction. The first wedge block 408 pushes the second wedge block 409 to reset the moving rod 403. The reset action of the moving rod 403 drives the turntable 506 to rotate in the opposite direction through the slide rod 503 and the L-shaped frame 504, thereby driving the rotating shaft 505 and the spray pipe 511 back to the initial position, preparing for the next angle adjustment. This forms a periodic dynamic lubrication process, effectively avoiding oil accumulation and splashing loss, and greatly improving lubrication efficiency.

[0052] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A thin-walled angular contact ball bearing for industrial robots, characterized in that, Includes an outer ring (1), an inner ring (2) is provided on the inner surface of the outer ring (1), a plurality of balls (3) are arranged in a circular shaft array between the outer ring (1) and the inner ring (2), an automatic spraying and replenishing mechanism (4) and a self-adjusting angle lubrication mechanism (5) are provided inside the outer ring (1), and a dustproof and waterproof mechanism (6) is provided at the top and bottom of the outer ring (1). The automatic spraying and replenishing mechanism (4) includes five connecting grooves (401) on the inner surface of the outer ring (1), five spheres (402) are slidably connected in the five connecting grooves (401), and five moving rods (403) are fixedly connected to the outer surface of the five spheres (402). The self-adjusting angle lubrication mechanism (5) includes five mounting slots (501) inside the outer ring (1). The inner sides of the five mounting slots (501) are provided with five sliding grooves (502) communicating with the five connecting slots (401). Five sliding rods (503) are slidably connected within the five sliding grooves (502). One end of each sliding rod (503) is fixedly connected to five L-shaped brackets (504), and the other end of each sliding rod (503) is connected to five moving rods (403). The five mounting slots (501) are fixedly connected, and five rotating shafts (505) are rotatably connected to the inner side of each of the five mounting slots (501). Five turntables (506) are fixedly connected to the top of each of the five rotating shafts (505). Five connecting rods (507) are hinged between each of the five turntables (506) and the five L-shaped frames (504). Five adjusting blocks (508) are fixedly sleeved on the outer surface of each of the five rotating shafts (505). Five spray pipes (511) are installed on one side of each of the five adjusting blocks (508). The automatic spraying and replenishing mechanism (4) further includes five piston cylinders (404) fixedly connected to the inside of the outer ring (1). Five piston plates (405) are slidably connected inside the five piston cylinders (404). Five piston rods (406) are fixedly connected to one end of the five piston plates (405). Five first return springs (407) are fixedly connected to the inner side of the five piston cylinders (404). One end of the five first return springs (407) is fixedly connected to the five piston plates (405), and the five first return springs (407) are sleeved on the outer surface of the five piston rods (406). One end of the five piston rods (406) movably passes through the five piston cylinders (404) and the five connecting grooves (401) and is fixedly connected to five first wedge blocks (408). One end of the five moving rods (403) is fixedly connected to five second wedge blocks (409). The outer ring (1) has an annular oil reservoir (410) inside. The tops of the five piston cylinders (404) are fixedly connected to five oil extraction pipes (411). The ends of the five oil extraction pipes (411) away from the five piston cylinders (404) are connected to the inside of the annular oil reservoir (410). The top of the outer ring (1) has an oil injection hole (412) connected to the annular oil reservoir (410). A sealing plug (413) is provided in the oil injection hole (412). Five conveying pipes (414) are fixedly connected to the outer surfaces of the five piston cylinders (404). The end of the five conveying pipes (414) away from the five piston cylinders (404) passes through the five mounting slots (501) and is fixedly connected to the five telescopic pipes (415). The end of the five telescopic pipes (415) away from the five conveying pipes (414) passes through the five adjusting blocks (508) and is connected to the interior of the five spraying pipes (511). One-way plates are provided at the connection positions of the five piston cylinders (404), the five oil extraction pipes (411), the five conveying pipes (414), the five telescopic pipes (415) and the five spraying pipes (511).

2. The thin-walled angular contact ball bearing for industrial robots according to claim 1, characterized in that: Five support blocks (416) are fixedly connected to the inner side of the five mounting slots (501), and the five support blocks (416) are sleeved on the outer surface of the five conveying pipes (414). Two first limiting slots (417) are opened on the inner side of each of the five connecting slots (401). A first limiting block (418) is slidably connected to the inner side of each of the two first limiting slots (417), and the first limiting block (418) is fixedly connected to the piston rod (406).

3. The thin-walled angular contact ball bearing for industrial robots according to claim 1, characterized in that: The self-adjusting angle lubrication mechanism (5) also includes five through slots (509) opened inside the five mounting slots (501). The five spray pipes (511) are slidably connected to the five through slots (509). Two support telescopic rods (510) are fixedly connected to the inner side of each of the five mounting slots (501), and the telescopic ends of the support telescopic rods (510) are fixedly connected to the L-shaped frame (504).

4. The thin-walled angular contact ball bearing for industrial robots according to claim 1, characterized in that: The dustproof and waterproof mechanism (6) includes two grooves (601) opened on the top of the outer ring (1). Two moving blocks (602) are slidably connected in the two grooves (601). Two third wedge blocks (603) are fixedly connected to one side of the two moving blocks (602). Two second return springs (604) and two third return springs (605) are fixedly connected to the inner side of the two grooves (601). One end of the two second return springs (604) is fixedly connected to the two moving blocks (602). One end of the two third return springs (605) is fixedly connected to two pop-out plates (606).

5. The thin-walled angular contact ball bearing for industrial robots according to claim 1, characterized in that: A dustproof plate (607) is provided between the outer ring (1) and the inner ring (2), and two extrusion blocks (608) are fixedly connected to the outer surface of the dustproof plate (607).

6. The thin-walled angular contact ball bearing for industrial robots according to claim 4, characterized in that: The inner sides of the two grooves (601) are provided with four second limiting grooves (609) and four third limiting grooves (611). Four second limiting blocks (610) are slidably connected in the four second limiting grooves (609). The four second limiting blocks (610) are fixedly connected to the two pop-out plates (606). Four third limiting blocks (612) are slidably connected in the four third limiting grooves (611). The four third limiting blocks (612) are fixedly connected to the two moving blocks (602).

7. The thin-walled angular contact ball bearing for industrial robots according to claim 1, characterized in that: The outer surfaces of the multiple balls (3) are provided with multiple connecting frames (7) that are rotatably connected to the outer surface of the inner ring (2), and the multiple balls (3) are slidably connected to the outer ring (1).

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