Sliding bearing with four layers of metal

Abstract

The invention discloses a four-layer metal sliding bearing, and particularly relates to the technical field of rotary motion bearings, the four-layer metal sliding bearing comprises a bearing outer layer, a bearing inner layer, a plurality of balls and a rotary motion protection blocking assembly; the rotary motion protection blocking assembly comprises a sliding frame, a screw rod, a threaded sleeve block, a connecting strip, a baffle ring, a proximity sensor, a distance sensor and a gear motor, and further comprises a rotary motion supporting sliding assembly and a lubricating assembly. Through the rotary motion protection blocking assembly, the bearing inner layer can perform rotary motion operation through the rotary shaft, external dust and impurities are prevented from entering a gap between the bearing outer layer and the bearing inner layer, large abrasion is avoided, and the durability of the bearing in the rotary motion process is better; therefore, the problems that dust and impurities are in contact with the interior of the rotary motion bearing, large abrasion is easily caused, and the durability of the bearing in the rotary motion process is poor are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of rotary motion bearings, and more particularly to a four-layer metal sliding bearing. Background Art

[0002] The four-layer metal sliding bearings specially used for rotational motion of industrial robots are of great use in industrial robot systems. As the "rotation" of the mechanical base, the sliding bearings connect the various parts of the robotic arm to ensure that the robotic arm can rotate flexibly in all directions. They support the working parts of the industrial robot so that it can operate stably during the rotational motion.

[0003] In the existing public documents, the technology of China Publication No. CN117231626A discloses a sliding bearing suitable for marine environment and its manufacturing method. This technology makes the bearing thickness much thinner than the traditional metal bearing; the inner ring of the bearing body is provided with a lining layer of carbon fiber modified polytetrafluoroethylene, which improves the wear resistance, reduces the friction coefficient and friction vibration, and thus increases the service life of the invention. However, this technology still has the following problems.

[0004] Four-layer metal sliding bearings are used in industrial robots for rotational motion. The sliding contact area inside the bearing during the rotational motion is in the external gap, which will cause dust and impurities to contact the inside of the rotating motion bearing, which can easily cause severe wear. The durability of the bearing during the rotational motion is poor, so a four-layer metal sliding bearing is needed. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides the following technical solutions: a four-layer metal sliding bearing, comprising a bearing outer layer, a bearing inner layer is installed inside the bearing outer layer, a plurality of balls are provided between the bearing inner layer and the bearing outer layer in sliding connection, and a rotational motion protection and blocking component is provided on one side of the outer wall of the bearing outer layer; the rotational motion protection and blocking component comprises a sliding frame fixedly arranged on one side of the outer wall of the bearing outer layer, and a screw is rotatably connected to the inner wall of the sliding frame, a threaded sleeve is threadedly connected to the outer wall of the screw, and the threaded sleeve is slidably connected to the sliding frame; a connecting strip is fixedly connected to one side of the threaded sleeve, and a retaining ring is fixedly installed on the top of the connecting strip, a proximity sensor is fixedly connected to the inner wall of the retaining ring, a distance sensor is provided on one side of the proximity sensor, and the distance sensor is fixedly connected to the retaining ring; a reduction motor is fixedly installed on the bottom end of the sliding frame, and the reduction motor is used to drive the screw to rotate; a rotational motion support sliding component is provided on the outer wall of the ball; and a lubrication component is plugged into the outer wall of the bearing outer layer.

[0006] Preferably, the outer wall of the threaded sleeve and the inner wall of the sliding frame are both smooth surfaces, and the threaded sleeve is slidably connected to the outer layer of the bearing. A plurality of the balls are arranged in an equidistant circular ring, the cross-sectional shape of the inner layer of the bearing is annular, the bottom end of the inner layer of the bearing is fixedly connected to a bottom layer ring, and a limiting layer ring is fixedly installed at the bottom end of the bottom layer ring, a sealing swivel is fixedly connected to the upper surface of the limiting layer ring, and an embedded groove ring is rotatably connected to the outer wall of the sealing swivel, the embedded groove ring is fixedly connected to the outer layer of the bearing, a circuit board is embedded and installed on one side of the inner wall of the outer layer of the bearing, and the circuit board is fixedly connected to the outer layer of the bearing.

[0007] When this technology is in use, the reduction motor drives the screw to rotate, the threaded sleeve slides down along the inner wall of the slide frame, the connecting strip drives the retaining ring to move downward, the retaining ring drives the proximity sensor to move downward, and the proximity sensor performs proximity sensing on the upper surface of the outer layer of the bearing. In this way, the retaining ring can perform sealing and protective operations on the upper surfaces of the outer layer of the bearing and the inner layer of the bearing. The inner layer of the bearing is assembled on the rotating shaft of the industrial robot, and the rotating shaft enables the inner layer of the bearing to perform rotational motion operations.

[0008] Preferably, the rotary motion supporting sliding assembly comprises a bearing ball sleeve slidably arranged on the outer wall of the ball; a pillar is fixedly connected to the upper surface of the bearing ball sleeve, and a support sleeve block is fixedly connected to the outer wall of the pillar, a reinforcement block is fixedly installed on one side of the support sleeve block, and the reinforcement block is slidably connected to the inner layer of the bearing; a support bar is fixedly installed on one side of the reinforcement block, the support bar is fixedly connected to the outer layer of the bearing, and an arc groove is opened on one side of the support bar. The support bar is fixedly connected to the bearing ball sleeve, and the cross-sectional shape of the pillar is circular. The pillar is used to support the support sleeve block, and the outer wall of the reinforcement block and the outer wall of the inner layer of the bearing are both smooth surfaces.

[0009] When this technology is in use, the inner layer of the bearing rotates to drive multiple balls to slide, while the outer layer of the bearing supports the balls inside the arc groove, the support bar supports the reinforcement block, and the reinforcement block supports the support sleeve block, the support sleeve block supports the pillar, and the pillar provides support force for the bearing ball sleeve.

[0010] Preferably, the lubrication assembly comprises a plurality of shunt pipes plugged into the outer wall of the outer layer of the bearing; The plurality of shunt pipes are all fixedly connected to the outer layer of the bearing, an annular tube is installed at one end of the shunt pipe, and the plurality of shunt pipes are all fixedly connected to the annular tube, a booster pump is fixedly installed on one side of the outer wall of the annular tube, and the input end of the booster pump is fixedly connected to a suction pipe; the outer wall of the suction pipe is fixedly connected to a lubricating oil tank, a docking pipe is provided above the booster pump, and the docking pipe is fixedly connected to the lubricating oil tank, a threaded cover is threadedly connected to the outer wall of the docking pipe, and a plurality of fixing seats are fixedly connected to the bottom end of the annular tube, and the plurality of fixing seats are arranged equidistantly in a circular ring.

[0011] When the technology is in use, the threads between the threaded cover and the butt tube are separated, and the loading operation is realized through the lubricating oil tank. The threads between the threaded cover and the butt tube are closed, and the booster pump is started so that the suction pipe pours the lubricating oil into the annular tube. The lubricating oil is diverted along the annular tube to multiple diversion pipes. The diversion pipes realize the lubricating oil filling operation on the inner part of the outer layer of the bearing. When the oil level distance value sensed by the distance sensor is the same as the oil level distance value set by the circuit board, the booster pump is turned off through the circuit board.

[0012] Technical effects and advantages of the present invention: 1. The present invention protects the blocking component through rotational motion. The reduction motor drives the screw to rotate, and the screw drives the threaded sleeve to move downward under the action of the thread transmission force. The connecting strip drives the retaining ring to move downward, and the retaining ring drives the proximity sensor to move downward. The retaining ring can seal and protect the upper surfaces of the outer layer of the bearing and the inner layer of the bearing. The rotating shaft enables the inner layer of the bearing to perform rotational motion, thereby preventing external dust and impurities from entering the gap between the outer layer of the bearing and the inner layer of the bearing, avoiding causing large wear, and improving the durability of the bearing during rotational motion.

[0013] 2. The present invention adopts a rotational motion supporting sliding component. The ball slides inside the bearing ball sleeve. The support bar supports the reinforcement block. The reinforcement block supports the sliding operation on the outer wall of the inner layer of the bearing. The support sleeve block supports the pillar. The pillar provides supporting force for the bearing ball sleeve. The bearing ball sleeve can support and slide multiple balls, stably limit and support the sliding of multiple balls to avoid wear and displacement of the balls. In this way, the bearing has better durability during rotational motion.

[0014] 3. The present invention adopts a lubrication component, starts the booster pump so that the suction pipe pours the lubricating oil into the annular tube, and then the lubricating oil is diverted along the annular tube to multiple diversion pipes. The diversion pipes realize the lubricating oil filling operation on the inner part of the outer layer of the bearing. At the same time, the distance sensor can sense the oil level distance, so that precise lubrication operation can be achieved for multiple ball bearings, making the bearing more durable during rotation.

[0015] First, the interaction of the above multiple functions first prevents external dust and impurities from entering the gap between the outer layer and the inner layer of the bearing, then enables the bearing ball sleeve to support and slide multiple balls, and finally the shunt pipe fills the lubricating oil inside the outer layer of the bearing. In summary, the multiple balls are prevented from causing greater wear, and the bearing is more durable during rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the four-layer metal sliding bearing of the present invention.

[0017] Figure 2 It is a schematic diagram of the partial structure of the connection between the outer layer of the bearing and the sliding frame of the present invention.

[0018] Figure 3 It is a schematic diagram of the partial structure of the connection between the retaining ring and the connecting strip of the present invention when viewed from above.

[0019] Figure 4 It is a schematic diagram of the vertical cross-section structure of the four-layer metal sliding bearing of the present invention.

[0020] Figure 5 It is a schematic diagram of the cross-sectional structure of the four-layer metal sliding bearing of the present invention.

[0021] Figure 6 For the present invention Figure 5 Enlarged structural diagram at A in the middle.

[0022] Figure 7 It is a schematic diagram of the partial structure of the connection between the support and the supporting sleeve block of the present invention.

[0023] Figure 8 It is a schematic diagram of the local structure of the vertical section of the connection between the ring pipe and the diverter pipe of the present invention.

[0024] The accompanying drawings are marked as follows: 1. outer layer of bearing; 2. inner layer of bearing; 3. ball; 4. slide frame; 5. screw; 6. threaded sleeve block; 7. connecting strip; 8. retaining ring; 9. proximity sensor; 10. distance sensor; 11. reduction motor; 12. bottom layer ring; 13. limiting layer ring; 14. sealing swivel; 15. embedded groove ring; 16. circuit board; 17. bearing ball sleeve; 18. pillar; 19. support sleeve block; 20. reinforcement block; 21. support strip; 22. arc groove; 23. shunt pipe; 24. ring pipe; 25. booster pump; 26. suction pipe; 27. lubricating oil tank; 28. butt pipe; 29. ​​threaded cover; 30. fixing seat. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] As attached Figure 1 - Attachment Figure 8 A four-layer metal sliding bearing is shown, and the four-layer metal sliding bearing is provided with a rotational motion protection blocking component, a rotational motion supporting sliding component, and a lubrication component. The arrangement of each component can avoid greater wear caused by multiple balls 3, and the bearing has better durability during rotational motion. The specific structural arrangement of each component is as follows.

[0027] In this embodiment, as shown in the attached Figure 1 - Attachment Figure 4 As shown, a bearing inner layer 2 is installed inside the bearing outer layer 1, a plurality of balls 3 are slidably connected between the bearing inner layer 2 and the bearing outer layer 1, and a rotational motion protection blocking component is provided on one side of the outer wall of the bearing outer layer 1.

[0028] The rotational motion protection and blocking assembly includes a sliding frame 4 fixedly arranged on one side of the outer wall of the bearing outer layer 1, and the inner wall of the sliding frame 4 is rotatably connected with a screw rod 5, the outer wall of the screw rod 5 is threadedly connected with a threaded sleeve block 6, and the threaded sleeve block 6 and the sliding frame 4 are slidingly connected; a connecting strip 7 is fixedly connected to one side of the threaded sleeve block 6, and a retaining ring 8 is fixedly installed on the top of the connecting strip 7, a proximity sensor 9 is fixedly connected to the inner wall of the retaining ring 8, a distance sensor 10 is provided on one side of the proximity sensor 9, and the distance sensor 10 and the retaining ring 8 are fixedly connected; a reduction motor 11 is fixedly installed on the bottom end of the sliding frame 4, and the reduction motor 11 is used to drive the screw rod 5 to rotate; the outer wall of the ball 3 is provided with a rotational motion supporting sliding assembly; the outer wall of the bearing outer layer 1 is plugged with a lubrication assembly.

[0029] In this embodiment, as shown in the attached Figure 4 As shown, the bottom end of the inner layer 2 of the bearing is fixedly connected with a bottom ring 12, and the bottom end of the bottom ring 12 is fixedly installed with a limiting layer ring 13, the upper surface of the limiting layer ring 13 is fixedly connected with a sealing swivel 14, and the outer wall of the sealing swivel 14 is rotatably connected with an embedded groove ring 15, and the embedded groove ring 15 is fixedly connected with the outer layer 1 of the bearing, so that the bottom ring 12 drives the limiting layer ring 13 to rotate, the limiting layer ring 13 makes the sealing swivel 14 rotate, and the sealing swivel 14 rotates inside the embedded groove ring 15, and the outer layer 1 of the bearing supports the embedded groove ring 15. A circuit board 16 is embedded and installed on one side of the inner wall of the outer layer 1 of the bearing, and the circuit board 16 is fixedly connected with the outer layer 1 of the bearing, so that the circuit board 16 starts the reduction motor 11, and the reduction motor 11 drives the screw 5 to rotate.

[0030] In this embodiment, as shown in the attached Figure 5 - Attachment Figure 7 As shown, the rotary motion supporting sliding assembly includes a bearing ball sleeve 17 slidably arranged on the outer wall of the ball 3; a pillar 18 is fixedly connected to the upper surface of the bearing ball sleeve 17, and a support sleeve block 19 is fixedly connected to the outer wall of the pillar 18, a reinforcement block 20 is fixedly installed on one side of the support sleeve block 19, and the reinforcement block 20 is slidably connected to the bearing inner layer 2; a support bar 21 is fixedly installed on one side of the reinforcement block 20, and the support bar 21 is fixedly connected to the bearing outer layer 1, and an arc groove 22 is opened on one side of the support bar 21. The support bar 21 is fixedly connected to the bearing ball sleeve 17, the cross-sectional shape of the pillar 18 is circular, the pillar 18 is used to support the support sleeve block 19, and the outer wall of the reinforcement block 20 and the outer wall of the bearing inner layer 2 are both smooth surfaces.

[0031] In this embodiment, as shown in the attached Figure 1 - Attachment Figure 8 As shown, the lubrication assembly includes a plurality of shunt pipes 23 inserted into the outer wall of the bearing outer layer 1; the plurality of shunt pipes 23 are fixedly connected to the bearing outer layer 1, an annular pipe 24 is installed at one end of the shunt pipe 23, and the plurality of shunt pipes 23 are fixedly connected to the annular pipe 24, a booster pump 25 is fixedly installed on one side of the outer wall of the annular pipe 24, and the input end of the booster pump 25 is fixedly connected to a suction pipe 26.

[0032] The outer wall of the suction pipe 26 is fixedly connected to a lubricating oil tank 27, a butt joint 28 is provided above the booster pump 25, and the butt joint 28 is fixedly connected to the lubricating oil tank 27, and a threaded cap 29 is threadedly connected to the outer wall of the butt joint 28. The bottom end of the ring pipe 24 is fixedly connected to a plurality of fixing seats 30, and the plurality of fixing seats 30 are arranged in a circular ring with equal spacing.

[0033] The working principle of the four-layer metal sliding bearing of the present invention is as follows: Step 1: When the rotational motion protection is blocked, the fixing seat 30 can be fixed by inserting the bolts into the fixing seat 30, the fixing seat 30 supports the annular tube 24, the annular tube 24 supports the shunt tube 23, the shunt tube 23 supports the outer layer 1 of the bearing, and the circuit board 16 starts the reduction motor 11. The reduction motor 11 drives the screw 5 to rotate, the screw 5 drives the threaded sleeve 6 to move downward under the action of the thread transmission force, the threaded sleeve 6 slides down along the inner wall of the slide frame 4, the threaded sleeve 6 drives the connecting strip 7 to move downward, the connecting strip 7 drives the retaining ring 8 to move downward, the retaining ring 8 drives the proximity sensor 9 to move downward, and the retaining ring 8 drives the distance sensor 10 to move downward, the proximity sensor 9 performs proximity sensing on the upper surface of the outer layer 1 of the bearing, so that the retaining ring 8 can perform sealing protection operations on the upper surfaces of the outer layer 1 of the bearing and the inner layer 2 of the bearing, and the inner layer 2 of the bearing is assembled on the rotating shaft of the industrial robot, and the rotating shaft enables the inner layer 2 of the bearing to perform rotational motion operations. At the same time, the inner layer 2 of the bearing drives the bottom layer ring 12 to rotate, the bottom layer ring 12 drives the limiting layer ring 13 to rotate, the limiting layer ring 13 causes the sealing rotating ring 14 to rotate, and the sealing rotating ring 14 rotates inside the embedded groove ring 15. At the same time, the outer layer 1 of the bearing supports the embedded groove ring 15.

[0034] Step 2, when the rotational motion supports sliding, when the inner layer 2 of the bearing rotates, it will drive multiple balls 3 to slide, and the balls 3 slide inside the bearing ball sleeve 17. At the same time, the outer layer 1 of the bearing supports the balls 3 inside the arc groove 22, and the outer layer 1 of the bearing supports the support bar 21, the support bar 21 supports the reinforcement block 20, and the reinforcement block 20 supports the sliding operation on the outer wall of the inner layer 2 of the bearing. At the same time, the reinforcement block 20 supports the support sleeve block 19, the support sleeve block 19 supports the pillar 18, and the pillar 18 provides support force for the bearing ball sleeve 17, so that the bearing ball sleeve 17 can achieve precise support operation for multiple balls 3.

[0035] Step three, when lubricating, the threaded cover 29 can be turned over, the threads between the threaded cover 29 and the butt joint 28 are separated, the lubricating oil is poured into the butt joint 28, and then poured into the lubricating oil tank 27 from the butt joint 28, and the loading operation is realized through the lubricating oil tank 27, and then the threaded cover 29 is turned forward, the threads between the threaded cover 29 and the butt joint 28 are closed, and the booster pump 25 is started so that the suction pipe 26 pours the lubricating oil into the annular tube 24, and then the lubricating oil is diverted along the annular tube 24 to multiple shunt pipes 23, and the shunt pipes 23 realize the lubricating oil filling operation on the inner part of the outer layer 1 of the bearing, and at the same time, the distance sensor 10 can sense the oil level distance. When the oil level distance value sensed by the distance sensor 10 is the same as the oil level distance value set by the circuit board 16, the booster pump 25 is turned off through the circuit board 16.

[0036] The contents not described in detail in the specification belong to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used. In this technical solution, the electrical control components not mentioned are not shown in the figure because they belong to the prior art and will not be described here.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A four-layer metal sliding bearing, comprising a bearing outer layer (1), characterized in that: A bearing inner layer (2) is installed inside the bearing outer layer (1), a plurality of balls (3) are provided in sliding connection between the bearing inner layer (2) and the bearing outer layer (1), and a rotational motion protection and blocking component is provided on one side of the outer wall of the bearing outer layer (1); The rotational motion protection and blocking assembly comprises a sliding frame (4) fixedly arranged on one side of the outer wall of the bearing outer layer (1), and the inner wall of the sliding frame (4) is rotatably connected to a screw rod (5), the outer wall of the screw rod (5) is threadedly connected to a threaded sleeve (6), and the threaded sleeve (6) is slidably connected to the sliding frame (4); A connecting strip (7) is fixedly connected to one side of the threaded sleeve (6), and a retaining ring (8) is fixedly installed on the top of the connecting strip (7), a proximity sensor (9) is fixedly connected to the inner wall of the retaining ring (8), a distance sensor (10) is provided on one side of the proximity sensor (9), and the distance sensor (10) and the retaining ring (8) are fixedly connected; A reduction motor (11) is fixedly mounted on the bottom end of the slide frame (4), and the reduction motor (11) is used to drive the screw rod (5) to rotate; The outer wall of the ball (3) is provided with a rotationally movable supporting sliding assembly; The outer wall of the bearing outer layer (1) is plugged with a lubrication component.

2. The four-layer metal sliding bearing according to claim 1, characterized in that: The outer wall of the threaded sleeve (6) and the inner wall of the sliding frame (4) are both smooth surfaces, and the threaded sleeve (6) is slidably connected to the outer layer (1) of the bearing.

3. The four-layer metal sliding bearing according to claim 1 is characterized in that: The plurality of balls (3) are arranged in a circular ring with equal spacing, and the cross-sectional shape of the inner layer (2) of the bearing is a circular ring.

4. The four-layer metal sliding bearing according to claim 1, characterized in that: The bottom end of the bearing inner layer (2) is fixedly connected to a bottom layer ring (12), and a limiting layer ring (13) is fixedly installed on the bottom end of the bottom layer ring (12), the upper surface of the limiting layer ring (13) is fixedly connected to a sealing swivel (14), and the outer wall of the sealing swivel (14) is rotatably connected to an embedded groove ring (15), and the embedded groove ring (15) is fixedly connected to the bearing outer layer (1).

5. The four-layer metal sliding bearing according to claim 4 is characterized in that: A circuit board (16) is embedded and installed on one side of the inner wall of the bearing outer layer (1), and the circuit board (16) and the bearing outer layer (1) are fixedly connected.

6. The four-layer metal sliding bearing according to claim 1, characterized in that: The rotary motion supporting sliding assembly comprises a bearing ball sleeve (17) slidably arranged on the outer wall of the ball (3); The upper surface of the bearing ball sleeve (17) is fixedly connected to a pillar (18), and the outer wall of the pillar (18) is fixedly connected to a support sleeve block (19), and a reinforcement block (20) is fixedly installed on one side of the support sleeve block (19), and the reinforcement block (20) is slidably connected to the inner layer (2) of the bearing; A support bar (21) is fixedly mounted on one side of the reinforcement block (20), the support bar (21) is fixedly connected to the outer layer (1) of the bearing, and an arc-shaped groove (22) is provided on one side of the support bar (21).

7. The four-layer metal sliding bearing according to claim 6, characterized in that: The support bar (21) is fixedly connected to the bearing ball sleeve (17), and the cross-sectional shape of the support column (18) is circular.

8. The four-layer metal sliding bearing according to claim 6, characterized in that: The support column (18) is used to support the support sleeve block (19), and the outer wall of the reinforcement block (20) and the outer wall of the bearing inner layer (2) are both smooth surfaces.

9. The four-layer metal sliding bearing according to claim 1, characterized in that: The lubrication assembly comprises a plurality of flow dividers (23) plugged into the outer wall of the bearing outer layer (1); The plurality of flow dividers (23) are all fixedly connected to the outer layer (1) of the bearing, an annular tube (24) is installed at one end of the flow divider (23), the plurality of flow dividers (23) are all fixedly connected to the annular tube (24), a booster pump (25) is fixedly installed on one side of the outer wall of the annular tube (24), and the input end of the booster pump (25) is fixedly connected to a suction pipe (26); The outer wall of the suction pipe (26) is fixedly connected to a lubricating oil tank (27), a butt joint pipe (28) is provided above the booster pump (25), and the butt joint pipe (28) is fixedly connected to the lubricating oil tank (27), and a threaded cover (29) is threadedly connected to the outer wall of the butt joint pipe (28).

10. The four-layer metal sliding bearing according to claim 9, characterized in that: A plurality of fixing seats (30) are fixedly connected to the bottom end of the ring tube (24), and the plurality of fixing seats (30) are arranged and distributed equidistantly in a circular ring.

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