Bearing for an industrial robot

Abstract

The application provides a bearing for an industrial robot, and belongs to the technical field of industrial robot bearings. The bearing comprises an outer ring, an inner ring, a plurality of rollers, and an adjusting mechanism. The inner ring is arranged between the inner walls of the outer ring. A rolling groove is arranged between the gap between the inner ring and the outer ring. The plurality of rollers are arranged in a cross shape between the inner walls of the rolling groove. The plurality of rollers are filled with a plurality of partition blocks. The adjusting mechanism is arranged between the outer ring and the inner ring. The plurality of partition blocks carry the plurality of rollers in the rolling groove to move in a central radial manner. The plurality of partition blocks drive the plurality of rollers to be uniformly dispersed between the inner walls of the rolling groove. The plurality of partition blocks are adjusted to be distributed in a central axial manner in the rolling groove. The gap position between the rollers is adjusted. The rollers are connected to the inner ring while being more fitted to the outer ring. The rolling groove is fully filled. The outer ring and the inner ring are coaxial in the radial direction. High-decibel noise generated by collision and friction between the outer ring and the inner ring during high-speed rotation of the bearing outer ring and the inner ring is avoided.

Description

Technical Field

[0001] This invention belongs to the field of industrial robot bearing technology, and specifically relates to a bearing for industrial robots. Background Technology

[0002] An industrial robot is a programmable, multi-functional automated manipulator that typically has three or more freely movable axes (degrees of freedom). They are designed to perform various tasks in industrial environments, such as handling, assembly, welding, painting, cutting, inspection, and packaging, to replace or assist human work and improve production efficiency, product quality, and safety.

[0003] Industrial robot bearings are core components of robot joints and transmission systems. Their performance directly affects the robot's motion accuracy, load-bearing capacity, and lifespan. Industrial robot bearings include thin-walled bearings with cross-sections such as cross roller bearings and bearings specifically designed for harmonic reducers. Among them, cross roller bearings are high-precision, high-rigidity bearings. Their core feature is that the rollers are arranged in a 90° orthogonal cross pattern within a V-shaped raceway. This unique design allows them to simultaneously withstand combined radial, axial, and overturning moment loads, achieving a rigidity 3-5 times that of traditional bearings. Precision spacers or integrated separators precisely position the rollers, reducing friction and ensuring even load distribution.

[0004] Publication number "CN210769835U" describes "a high-precision cross-shaped cylindrical roller bearing for industrial robots, comprising at least an inner ring and an outer ring, with a plurality of cylindrical rollers arranged between the inner and outer rings, adjacent cylindrical rollers being arranged in a cross shape. A locking wedge is provided on the inner ring near the cylindrical rollers, the locking wedge being connected to the inner ring by bolts and pressing against the cylindrical rollers. By adjusting the tightness of the bolts, the clearance of the cylindrical rollers can be adjusted, improving the rotational accuracy of the high-precision cross-shaped cylindrical roller bearing for industrial robots. Furthermore, threaded holes can be provided on both the inner and outer rings to improve the installation accuracy of the high-precision cross-shaped cylindrical roller bearing for industrial robots. This utility model has the advantage of high precision, and its simple structure and ease of use can effectively meet the high-precision installation requirements of harmonic reducers for industrial robots."

[0005] The aforementioned patent adjusts the clearance between the locking wedge and the cylindrical roller by adjusting the tightness of the bolts, thereby adjusting the clearance of the cylindrical roller. This method of adjusting clearance is very simple, has low design cost, and the overall volume of the wedge mounting groove is small. After slotting, it has little impact on the rigidity of the inner ring, and the load force on the locking wedge is also small, which does not affect the normal transmission or overall structural strength of the high-precision cross-shaped cylindrical roller bearing for industrial robots. At the same time, the high-precision cross-shaped cylindrical roller bearing for industrial robots also ensures the overall rotational flexibility, thereby maintaining high rotational accuracy to meet the needs of different industrial robots. However, during the assembly and assembly of the bearing, the inner and outer rings of the bearing need to rely on tooling molds for auxiliary assembly, and the bearing itself does not have the function of overlapping the radial axes of the inner and outer rings. This makes the inner and outer rings of the bearing limited by the processing accuracy, resulting in a reduction in the coaxiality of the inner and outer rings. This causes the inner and outer rings of the bearing to be unable to be precisely radially coaxial, resulting in resonance and high-decibel noise during high-speed rotation of the bearing. Therefore, we propose a bearing for industrial robots. Summary of the Invention

[0006] The purpose of this invention is to provide a bearing for industrial robots, which aims to solve the problem of adjusting the axial distribution of the staggered rollers between the inner and outer rings of the bearing through a mechanical structure, adjusting the gap position between the rollers so that the rollers are connected to the inner ring and fit more closely to the outer ring, achieving full filling of the raceway, limiting the inner ring to the axial center of the outer ring, reducing the impact of machining accuracy on the inner and outer rings of the bearing, making the inner and outer rings of the bearing precisely radially coaxial, and reducing resonance wear and high decibel noise during high-speed rotation of the bearing.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A bearing for an industrial robot, including an outer ring;

[0009] An inner ring is disposed between the inner walls of the outer ring, and a raceway is provided between the inner ring and the outer ring.

[0010] Rollers, wherein multiple rollers are arranged in a cross shape between the inner walls of the raceway, and spacers are filled between the rollers; and

[0011] An adjustment mechanism is provided between the outer ring and the inner ring, and is connected to multiple spacers for moving the multiple spacers.

[0012] In a preferred embodiment of the present invention, the adjusting mechanism includes an actuating component, a limiting component, an elastic component, a sealing component, and a positioning component. Multiple sets of elastic components are provided, and these multiple sets of elastic components are connected to multiple spacers. The actuating component is located within the inner ring and is connected to multiple sets of elastic components. The limiting component is located within the inner ring and is connected to the actuating component. The sealing component is located between the inner walls of the outer ring and is connected to the inner ring. Two sets of positioning components are provided, and these two sets of positioning components are located between the inner walls of the outer ring and the inner ring.

[0013] In a preferred embodiment of the present invention, each set of positioning components includes an inner ring groove, an outer ring groove, positioning arc blocks, and an annular groove. The annular groove is formed on the outer side of the inner ring and is connected to the gap between the outer ring and the inner ring. The inner ring groove is formed on the inner wall of the annular groove, and the outer ring groove is formed on the inner wall of the outer ring, and the outer ring groove corresponds to the inner ring groove. Two positioning arc blocks are provided, and the two positioning arc blocks are fixedly connected between the inner walls of the annular groove by bolts, and the two positioning arc blocks are located between the inner walls of the inner ring groove and the outer ring groove.

[0014] In a preferred embodiment of the present invention, the actuating assembly includes a ring groove, a slanted groove, a rotating ring, a limiting semi-circular block, a gear groove, an auxiliary block, a driving gear, and a first internal hexagonal shaft. The ring groove is formed within the inner ring, and the rotating ring is rotatably connected to the inner wall of the ring groove. Two limiting semi-circular blocks are provided, and the two limiting semi-circular blocks are fixedly connected to the inner wall of the ring groove, with the two limiting semi-circular blocks located on both sides of the rotating ring. The gear groove is formed at the side end of the rotating ring. Two auxiliary blocks are provided, and the two auxiliary blocks are fixedly connected to the inner wall of the ring groove. The first internal hexagonal shaft is rotatably connected to the inner wall of the ring groove, with the internal hexagonal end of the first internal hexagonal shaft extending into the annular groove, and the other end of the first internal hexagonal shaft being rotatably connected to an auxiliary block. The driving gear is fixedly connected to the circumferential surface of the first internal hexagonal shaft, and the driving gear meshes with the gear groove. Multiple slanted grooves are provided, and the multiple slanted grooves are formed on the circumferential surface of the rotating ring, and the multiple slanted grooves correspond to multiple telescopic rods.

[0015] In a preferred embodiment of the present invention, each set of elastic components includes a telescopic hole, a telescopic rod, a compression sleeve, and a first spring. The telescopic hole is opened in the inner ring and is connected to the raceway. The telescopic rod is movably inserted between the circumferential inner walls of the telescopic hole. One end of the telescopic rod is fixedly connected to the spacer, and the other end of the telescopic rod is inserted into an inclined groove. The compression sleeve is fixedly connected to the circumferential surface of the telescopic rod and is located between the inner walls of the telescopic hole. The first spring is sleeved on the circumferential surface of the telescopic rod and is located between the inner walls of the telescopic hole. The first spring is fixedly connected to one side of the compression sleeve and is close to the spacer.

[0016] In a preferred embodiment of the present invention, the limiting component includes a limiting tooth groove, a pawl, a second spring, and a second internal hexagonal shaft. The limiting tooth groove is formed on the circumferential surface of the rotating ring. The second internal hexagonal shaft is rotatably connected between the inner walls of the ring groove, and the internal hexagonal end of the second internal hexagonal shaft extends to the inner walls of the ring groove. The pawl is fixedly connected to the circumferential surface of the second internal hexagonal shaft and engages with the limiting tooth groove. The second spring is fixedly connected to the side end of the pawl, and the other end of the second spring is fixedly connected to the inner wall of the ring groove.

[0017] As a preferred embodiment of the present invention, the sealing assembly includes two plastic sealing rings, which are engaged and connected by being embedded in two annular grooves.

[0018] As a preferred embodiment of the present invention, concentric grooves are provided on the side ends of the outer ring, inner ring and individual plastic sealing ring.

[0019] As a preferred embodiment of the present invention, a filler hole is formed on the circumferential surface of the outer ring, the filler hole is connected to the raceway, and an internal hexagon plug is threaded between the inner walls of the filler hole, and a positioning mark is formed between the internal hexagon plug and the outer ring.

[0020] As a preferred embodiment of the present invention, the gap between the outer ring and the inner ring and the raceway are filled with lubricant.

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

[0022] 1. In this solution, when multiple rollers need to be dispersed, the rotating ring rotates clockwise, causing the inclined surfaces in multiple grooves to gradually push multiple telescopic rods to extend into the raceway. The telescopic rods push multiple spacers closer to the inner wall of the raceway on the outer ring. Simultaneously, the spacers are distributed circumferentially from the center, causing multiple rollers to conform to the inner wall of the raceway on the outer ring, resulting in a uniform circumferential dispersion of the rollers. When multiple rollers need to retract, the rotating ring rotates counterclockwise, causing multiple inclined grooves to reset. Multiple first springs push multiple compression sleeves closer to the rotating ring, and the compression sleeves push multiple telescopic rods to reset. Multiple spacers are pulled closer to the inner ring. Through interlocking, these spacers cause multiple rollers to move circumferentially closer to the inner ring. The spacers carry the rollers in a radial movement within the raceway. The spacers cause the rollers to be evenly distributed between the inner walls of the raceway, allowing the spacers to be centrally axially distributed and adjusted. This adjusts the gap between the rollers, ensuring that the rollers are more closely fitted to the outer ring while connecting to the inner ring, thus fully filling the raceway. This makes the outer and inner rings radially coaxial, thereby avoiding high-decibel noise caused by collision and friction between the outer and inner rings during high-speed rotation of the bearing.

[0023] 2. In this solution, when multiple rollers move to the appropriate position, the swivel stops rotating, and the pawl, pushed by the second spring, engages with the limiting tooth groove, restricting the rotation of the swivel and stopping the spacer from moving. This restricts the position of multiple rollers. When multiple rollers need to move, an Allen wrench is used to rotate the second Allen shaft. The second Allen shaft drives the pawl to deflect, and the pawl counteracts the compression of the second spring. The pawl releases its engagement with the limiting tooth groove, allowing the swivel to rotate within the groove. By deflecting the pawl, the rotation of the swivel is controlled, thereby achieving the movement and restriction of multiple rollers. This effectively controls the uniformity of the clearance between the outer and inner rings of the bearing, reducing resonance wear during high-speed bearing rotation.

[0024] 3. In this solution, the inner ring is inserted between the inner walls of the outer ring, and then the two ends of a single positioning arc block are clamped using calipers, so that the single positioning arc block is inserted into the annular groove. Then, the clamping of the elastic ends of the positioning arc block is released, allowing the single positioning arc block to deform and recover within the annular groove. The arc-shaped concave end of the single positioning arc block is inserted into the inner annular groove, and the elastic ends of the single positioning arc block are inserted into the annular groove. The four positioning arc blocks in the two sets of positioning components simultaneously restrict the movement of the inner ring within the two annular grooves, confining the inner ring to the center of the inner circumference of the outer ring. This is used to further restrict the inner ring between the inner circumference of the outer ring, preventing misalignment during raceway production, facilitating the disassembly and installation of multiple rollers, maintaining the radial coaxiality of the outer and inner rings, and reducing the difficulty of bearing maintenance. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0026] Figure 1 This is a first-view perspective perspective view of a bearing for an industrial robot according to the present invention;

[0027] Figure 2 This is a second-view perspective perspective view of a bearing for an industrial robot according to the present invention;

[0028] Figure 3 This is a first half-sectional view of a bearing for an industrial robot according to the present invention;

[0029] Figure 4 This invention relates to a bearing for industrial robots. Figure 3 Enlarged view of point A;

[0030] Figure 5 This is a first full sectional view of a bearing for an industrial robot according to the present invention;

[0031] Figure 6 This is a second full sectional view of a bearing for an industrial robot according to the present invention;

[0032] Figure 7 This invention relates to a bearing for industrial robots. Figure 6 Enlarged view of point B;

[0033] Figure 8 This is a disassembly diagram of the plastic sealing ring of a bearing for an industrial robot according to the present invention;

[0034] Figure 9 This is a first exploded view of a bearing for an industrial robot according to the present invention;

[0035] Figure 10 This is a third full sectional view of a bearing for an industrial robot according to the present invention;

[0036] Figure 11 This is a second half cross-sectional view of a bearing for an industrial robot according to the present invention.

[0037] In the diagram: 1. Outer ring; 2. Inner ring; 3. Raceway; 4. Ring groove; 5. Roller; 6. Spacer; 7. Telescopic hole; 8. Telescopic rod; 9. Extrusion sleeve; 10. First spring; 11. Inclined groove; 12. Rotary ring; 13. Limiting semi-arc block; 14. Gear groove; 15. Auxiliary block; 16. Drive gear; 17. First internal hexagonal swivel shaft; 18. Limiting tooth groove; 19. Pawl; 20. Second spring; 21. Second internal hexagonal swivel shaft; 23. Inner ring groove; 24. Outer ring groove; 25. Positioning arc block; 26. Plastic sealing ring; 27. Concentric groove; 28. Annular groove; 29. ​​Filler hole; 30. Internal hexagonal plug; 31. Positioning groove. Detailed Implementation

[0038] 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.

[0039] Example 1

[0040] Reference Figures 1-11 A bearing for industrial robots, comprising:

[0041] Outer ring 1;

[0042] Inner ring 2 is disposed between the inner walls of outer ring 1, and a raceway 3 is provided between the inner ring 2 and outer ring 1.

[0043] Rollers 5, multiple rollers 5 are arranged in a cross shape between the inner walls of the raceway 3, and spacers 6 are filled between each roller 5; and

[0044] An adjustment mechanism is located between the outer ring 1 and the inner ring 2. The adjustment mechanism is connected to multiple spacers 6 and is used to move the multiple spacers 6.

[0045] In this invention, the outer ring 1 is used to accommodate the inner ring 2, the raceway 3 is used to accommodate multiple rollers 5 and spacers 6, the multiple rollers 5 are used to fill the raceway 3, and the multiple rollers 5 are used to reduce the contact area between the outer ring 1 and the inner ring 2. The adjusting mechanism is connected to the multiple spacers 6 and is used to move the multiple spacers 6 so that the multiple spacers 6 are dispersed in a circular pattern from the center to the surrounding area.

[0046] The adjustment mechanism includes a toggle assembly, a limit assembly, an elastic assembly, a sealing assembly, and a positioning assembly. Multiple sets of elastic assemblies are provided, and these sets of elastic assemblies are connected to multiple spacers 6. The toggle assembly is located inside the inner ring 2 and is connected to multiple sets of elastic assemblies. The limit assembly is located inside the inner ring 2 and is connected to the toggle assembly. The sealing assembly is located between the inner walls of the outer ring 1 and is connected to the inner ring 2. Two sets of positioning assemblies are provided, and these two sets of positioning assemblies are located between the inner walls of the outer ring 1 and the inner ring 2.

[0047] In this invention, the elastic component is used to push the multiple spacers 6 to retract and reset, the actuating component is used to push the multiple spacers 6 to move, the limiting component is used to restrict and lock the movement of the multiple spacers 6, the sealing component is used to seal the gap between the outer ring 1 and the inner ring 2, and the positioning component is used to assist in restricting the inner ring 2 to the axial center between the inner circumference of the outer ring 1.

[0048] Each positioning component includes an inner ring groove 23, an outer ring groove 24, positioning arc blocks 25, and an annular groove 28. The annular groove 28 is located on the outer side of the inner ring 2 and is connected to the gap between the outer ring 1 and the inner ring 2. The inner ring groove 23 is located on the inner wall of the annular groove 28, and the outer ring groove 24 is located on the inner wall of the outer ring 1. The outer ring groove 24 corresponds to the inner ring groove 23. There are two positioning arc blocks 25. The two positioning arc blocks 25 are fixedly connected to the inner wall of the annular groove 28 by bolts, and the two positioning arc blocks 25 are located between the inner walls of the inner ring groove 23 and the outer ring groove 24.

[0049] In this invention, the annular groove 28 is used to accommodate two positioning arc blocks 25, and the inner annular groove 23 and the outer annular groove 24 are used to accommodate the elastic ends of the two positioning arc blocks 25. The arc-shaped concave ends of the two positioning arc blocks 25 are inserted into the inner annular groove 23, and the elastic ends of the two positioning arc blocks 25 are inserted into the outer annular groove 24. The inner ring 2 is inserted between the inner walls of the outer ring 1, and then the two ends of a single positioning arc block 25 are clamped using calipers, so that the single positioning arc block 25 is inserted into the annular groove 28. Then the clamping of the elastic ends of the positioning arc block 25 is released, so that the single positioning arc block 25 is in the annular groove 28. The deformation is restored within the groove 28. The concave end of a single positioning arc block 25 is inserted into the inner ring groove 23, and the elastic ends of a single positioning arc block 25 are inserted into the annular groove 28. The four positioning arc blocks 25 in the two sets of positioning components simultaneously restrict the movement of the inner ring 2 within the two annular grooves 28, restricting the inner ring 2 to the center of the inner circumference of the outer ring 1. This is used to further restrict the inner ring 2 between the inner circumference of the outer ring 1, preventing misalignment of the raceway 3 during production. It also facilitates the disassembly and installation of multiple rollers 5, maintaining the radial coaxiality of the outer ring 1 and the inner ring 2, and reducing the difficulty of bearing maintenance.

[0050] The actuating assembly includes a ring groove 4, a slanted groove 11, a rotating ring 12, a limiting semi-circular block 13, a gear groove 14, an auxiliary block 15, a drive gear 16, and a first internal hexagonal shaft 17. The ring groove 4 is formed within the inner ring 2. The rotating ring 12 is rotatably connected to the inner wall of the ring groove 4. Two limiting semi-circular blocks 13 are provided, and the two limiting semi-circular blocks 13 are fixedly connected to the inner wall of the ring groove 4, with the two limiting semi-circular blocks 13 located on both sides of the rotating ring 12. The gear groove 14 is formed at the side end of the rotating ring 12. Two auxiliary blocks 15 are provided. The first hexagonal shaft 17 is rotatably connected to the inner wall of the ring groove 4. The hexagonal end of the first hexagonal shaft 17 extends into the annular groove 28, and the other end of the first hexagonal shaft 17 is rotatably connected to an auxiliary block 15. The drive gear 16 is fixedly connected to the circumferential surface of the first hexagonal shaft 17, and the drive gear 16 meshes with the gear groove 14. Multiple inclined grooves 11 are provided. Multiple inclined grooves 11 are opened on the circumferential surface of the rotating ring 12, and multiple inclined grooves 11 correspond to multiple telescopic rods 8.

[0051] In this invention, the ring groove 4 is used to accommodate the rotating ring 12, two limiting semi-circular blocks 13, two auxiliary blocks 15, the driving gear 16, the first internal hexagonal shaft 17, and the limiting assembly. The two limiting semi-circular blocks 13 are used to assist in positioning the rotating ring 12. The gear groove 14 is used to mesh with the driving gear 16. The two auxiliary blocks 15 are used to rotatably connect the first internal hexagonal shaft 17 and the second internal hexagonal shaft 21. The first internal hexagonal shaft 17 is used to drive the driving gear 16 to rotate. The driving gear 16 drives the rotating ring 12 to rotate through meshing with the gear groove 14. Multiple inclined grooves 11 are used to accommodate multiple extensions. When the telescopic rod 8 moves the multiple spacers 6, the pawl 19 does not engage with the limiting tooth groove 18. The first internal hexagonal shaft 17 is rotated using an internal hexagonal wrench. The first internal hexagonal shaft 17 drives the drive gear 16 to rotate. The drive gear 16 drives the rotating ring 12 to rotate in the ring groove 4 through meshing with the gear groove 14. During the rotation, the multiple inclined grooves 11 gradually squeeze one end of the multiple telescopic rods 8, causing the multiple telescopic rods 8 to slide in the multiple telescopic holes 7. This, in turn, pushes the multiple spacers 6 to carry the multiple rollers 5 to move in the raceway 3, providing power for the movement of the multiple rollers 5.

[0052] Each set of elastic components includes a telescopic hole 7, a telescopic rod 8, a compression sleeve 9, and a first spring 10. The telescopic hole 7 is opened in the inner ring 2 and is connected to the raceway 3. The telescopic rod 8 is movably inserted between the inner circumferential walls of the telescopic hole 7. One end of the telescopic rod 8 is fixedly connected to the spacer 6, and the other end of the telescopic rod 8 is inserted into an inclined groove 11. The compression sleeve 9 is fixedly connected to the circumferential surface of the telescopic rod 8 and is located between the inner walls of the telescopic hole 7. The first spring 10 is sleeved on the circumferential surface of the telescopic rod 8 and is located between the inner walls of the telescopic hole 7. The first spring 10 is fixedly connected to one side of the compression sleeve 9 and is close to the spacer 6.

[0053] In this invention, in each set of elastic components, the telescopic hole 7 is used to accommodate the telescopic rod 8, the compression sleeve 9, and the first spring 10. The telescopic rod 8 is used to push and pull the spacer 6, the compression sleeve 9 is used to bear the compression force of the first spring 10, and the first spring 10 is used to push the compression sleeve 9 closer to the rotating ring 12. When it is necessary to push multiple rollers 5 to disperse, the rotating ring 12 rotates clockwise, causing the inclined surfaces in multiple grooves 11 to gradually push multiple telescopic rods 8 to extend towards the raceway 3. The multiple telescopic rods 8 push multiple spacers 6 closer to the inner wall of the raceway 3 on the outer ring 1. At the same time, the multiple spacers 6 are distributed circumferentially from the center. The multiple spacers 6 drive multiple rollers 5 to fit against the inner wall of the raceway 3 of the outer ring 1, so that the multiple rollers 5 are evenly dispersed circumferentially. When it is necessary for multiple rollers 5 to retract, the rotating ring 12 rotates counterclockwise, causing the multiple grooves 11 to return to their original positions. In position, multiple first springs 10 push multiple extrusion sleeves 9 closer to the rotating ring 12. The multiple extrusion sleeves 9 push multiple telescopic rods 8 to reset. The multiple reset rods pull multiple spacers 6 closer to the inner ring 2. The multiple spacers 6 drive multiple rollers 5 to move circumferentially closer to the inner ring 2 through interlocking. The multiple spacers 6 carry multiple rollers 5 to move radially within the raceway 3. The multiple spacers 6 drive multiple rollers 5 to be evenly distributed between the inner walls of the raceway 3, so that the multiple spacers 6 can be centrally axially distributed and adjusted within the raceway 3. The gap position between the rollers is adjusted so that the rollers are connected to the inner ring and fit more closely to the outer ring, so as to fully fill the raceway 3. This makes the outer ring 1 and the inner ring 2 radially coaxial, thereby avoiding the high decibel noise generated by the collision and friction between the outer ring 1 and the inner ring 2 during high-speed rotation.

[0054] The limiting assembly includes a limiting tooth groove 18, a pawl 19, a second spring 20, and a second internal hexagonal shaft 21. The limiting tooth groove 18 is formed on the circumferential surface of the rotating ring 12. The second internal hexagonal shaft 21 is rotatably connected between the inner walls of the ring groove 4. The internal hexagonal end of the second internal hexagonal shaft 21 extends to the inner wall of the annular groove 28. The pawl 19 is fixedly connected to the circumferential surface of the second internal hexagonal shaft 21 and engages with the limiting tooth groove 18. The second spring 20 is fixedly connected to the side end of the pawl 19, and the other end of the second spring 20 is fixedly connected to the inner wall of the ring groove 4.

[0055] In this invention, the limiting groove 18 is used to accommodate one end of the pawl 19, and the second internal hexagonal shaft 21 is used to deflect the pawl 19. The pawl 19 limits the axial rotation angle range of the rotating ring 12 by engaging with the limiting groove 18. At the same time, the pawl 19 limits the rotation of the rotating ring 12 by rotating with the limiting groove 18. The second spring 20 is used to press and push the pawl 19 to engage with the limiting groove 18. When the multiple rollers 5 move to the appropriate position, the rotating ring 12 stops rotating, and the pawl 19 engages with the limiting groove 18 under the push of the second spring 20, limiting the rotation of the rotating ring 12, so that the spacer block 6. Stop moving, and then restrict the position of multiple rollers 5. When multiple rollers 5 need to move, use an Allen wrench to rotate the second Allen shaft 21. The second Allen shaft 21 drives the pawl 19 to deflect. The pawl 19 counteracts the compression of the second spring 20. The pawl 19 is released from the engagement with the limiting tooth groove 18, so that the rotating ring 12 can rotate in the ring groove 4. By deflecting the pawl 19, the rotation of the rotating ring 12 is controlled, thereby realizing the movement and restriction of multiple rollers 5, effectively controlling the uniformity of the gap between the outer ring 1 and the inner ring 2 of the bearing, and reducing resonance wear during high-speed rotation of the bearing.

[0056] The sealing assembly includes two plastic sealing rings 26, which are engaged and connected by being embedded in two annular grooves 28.

[0057] In this invention, the two plastic sealing rings 26 are detachably embedded in the two annular grooves 28. The two annular grooves 28 isolate the bearing gap, preventing dust and moisture from entering the bearing gap, and also preventing the lubricant from overflowing.

[0058] The outer ring 1, the inner ring 2, and the side ends of the individual plastic sealing ring 26 are provided with concentric grooves 27.

[0059] In this invention, the concentric grooves 27 are used to correct whether the outer ring 1 and the inner ring 2 are axially aligned. If the concentric grooves 27 are aligned, the outer ring 1 and the inner ring 2 of the bearing are radially coaxial. If the concentric grooves 27 are not aligned, the outer ring 1 and the inner ring 2 of the bearing are radially non-coaxial.

[0060] The outer ring 1 has a filling hole 29 on its circumferential surface. The filling hole 29 is connected to the raceway 3. The inner walls of the filling hole 29 are threaded together with an internal hexagon plug 30. The internal hexagon plug 30 and the outer ring 1 have a positioning mark 31.

[0061] In this invention, the filler hole 29 is used to accommodate the hexagonal plug 30, the hexagonal plug 30 is used to seal the filler hole 29, and one end of the hexagonal plug 30 is flush with the inner wall of the raceway 3. The positioning mark 31 is used to detect whether the filler hole 29 is aligned with the outer surface of the outer ring 1. At the same time, if the filler hole 29 is aligned with the outer surface of the outer ring 1, then one end of the filler hole 29 is flush with the inner wall of the raceway 3.

[0062] The gap between the outer ring 1 and the inner ring 2, as well as the raceway 3, are filled with lubricant.

[0063] In this invention, the gap between the outer ring 1 and the inner ring 2 and the raceway 3 are filled with lubricant to reduce the frictional loss of the multiple rollers 5, and at the same time to improve the frictional loss between the outer ring 1 and the inner ring 2, thereby increasing the service life of the bearing.

[0064] A method for using a bearing for an industrial robot includes the following steps:

[0065] The assembled bearings are installed at various connection points of the industrial robot. Before installation, multiple rollers 5 are brought close to the inner ring 2. First, the hexagonal plug 30 is unscrewed from the packing hole 29 using an Allen wrench. Lubricant is then introduced through the packing hole 29 into the gap between the outer ring 1 and the inner ring 2, and into the raceway 3. The hexagonal plug 30 is then threaded into the packing hole 29 using an Allen wrench. The packing hole 29 does not jam with the multiple rollers 5 and the spacer 6 during rotation. Then, the second hexagonal shaft 21 is rotated using an Allen wrench. The second hexagonal shaft 21 drives the pawl 19 to deflect, and the pawl 19 counteracts the push of the second spring 20, thus releasing the pawl 19. In addition to engaging with the limiting tooth groove 18, another Allen wrench is used to rotate the first Allen shaft 17 clockwise. The first Allen shaft 17 drives the drive gear 16 to rotate. The drive gear 16, through meshing with the first Allen shaft 17, pushes the rotating ring 12 to deflect axially within the ring groove 4. During the axial deflection, the multiple inclined grooves 11 on the rotating ring 12 gradually squeeze one end of the multiple telescopic rods 8, causing the multiple telescopic rods 8 to extend towards the raceway 3 through the multiple telescopic holes 7. The multiple telescopic rods 8 push the multiple spacers 6 radially towards the outer ring 1. When the first Allen shaft 17 is rotated counterclockwise, the multiple inclined grooves 11 gradually eliminate the pressure on the multiple extension rods 8. The compression of the retracting rod 8 causes multiple first springs 10 to deform and reset, pushing the multiple compression sleeves 9 closer to the rotating ring 12. The multiple compression sleeves 9 push the multiple telescopic rods 8 to retract, and the multiple telescopic rods 8 pull multiple spacers 6 closer to the inner ring 2. By observing whether the concentric marks 27 are aligned, the clockwise or counterclockwise rotation of the first internal hexagonal shaft 17 causes the multiple spacers 6 to drive the multiple rollers 5 to move closer to or away from the outer ring 1 within the raceway 3. This allows the multiple spacers 6 to be centrally axially distributed and adjusted within the raceway 3, adjusting the gap position between the rollers so that the rollers are connected to the inner ring while fitting more closely to the outer ring, achieving full filling of the raceway 3, and making the outer ring 1 and inner ring 2 radially coaxial. This avoids the high-decibel noise generated by the collision and friction between the outer ring 1 and inner ring 2 during high-speed rotation of the bearing. Then, the rotation of the inner hexagonal screw on the second inner hexagonal shaft 21 is canceled. Under the push of the second spring 20, the pawl 19 engages with the limiting tooth groove 18 to lock the deflection of the rotating ring 12, so that multiple rollers 5 are fixed in a specific position, realizing the movement and restriction of multiple rollers 5, effectively controlling the uniformity of the gap between the outer ring 1 and inner ring 2 of the bearing, reducing the resonance wear during high-speed rotation of the bearing. The two plastic sealing rings 26 are removed from the two annular grooves 28, and finally the bearing is installed at various connection points of the industrial robot.

[0066] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. 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 bearing for an industrial robot, characterized in that, include; Outer ring (1); Inner ring (2), the inner ring (2) is disposed between the inner walls of the outer ring (1), and a raceway (3) is provided between the inner ring (2) and the outer ring (1). Rollers (5), wherein multiple rollers (5) are provided, the multiple rollers (5) are arranged in a cross shape between the inner walls of the raceway (3), and spacers (6) are filled between the multiple rollers (5); and An adjustment mechanism is provided between the outer ring (1) and the inner ring (2), and the adjustment mechanism is connected to a plurality of spacers (6) for moving the plurality of spacers (6); The adjustment mechanism includes a toggle component, a limit component, an elastic component, a sealing component, and a positioning component. The elastic component is provided in multiple sets, and the multiple sets of elastic components are connected to multiple spacers (6). The toggle component is located inside the inner ring (2) and is connected to the multiple sets of elastic components. The limit component is located inside the inner ring (2) and is connected to the toggle component. The sealing component is located between the inner walls of the outer ring (1) and is connected to the inner ring (2). The positioning component is provided in two sets, and the two sets of positioning components are located between the inner walls of the outer ring (1) and the inner ring (2). The actuating assembly includes a ring groove (4), a slanted groove (11), a rotating ring (12), a limiting semi-circular block (13), a gear groove (14), an auxiliary block (15), a drive gear (16), and a first internal hexagonal shaft (17). The ring groove (4) is opened inside the inner ring (2). The rotating ring (12) is rotatably connected between the inner walls of the ring groove (4). There are two limiting semi-circular blocks (13), which are fixedly connected between the inner walls of the ring groove (4) and located on both sides of the rotating ring (12). The gear groove (14) is opened at the side end of the rotating ring (12). There are two auxiliary blocks (15), which are fixedly connected between the inner walls of the ring groove (4) and located on both sides of the rotating ring (12). The auxiliary block (15) is fixedly connected to the inner wall of the ring groove (4). The first internal hexagonal shaft (17) is rotatably connected between the inner walls of the ring groove (4). The internal hexagonal end of the first internal hexagonal shaft (17) extends into the annular groove (28), and the other end of the first internal hexagonal shaft (17) is rotatably connected to an auxiliary block (15). The driving gear (16) is fixedly connected to the circumferential surface of the first internal hexagonal shaft (17), and the driving gear (16) meshes with the gear groove (14). Multiple inclined grooves (11) are provided. Multiple inclined grooves (11) are opened on the circumferential surface of the rotating ring (12), and multiple inclined grooves (11) correspond to multiple telescopic rods (8). Each set of elastic components includes a telescopic hole (7), a telescopic rod (8), a compression sleeve (9), and a first spring (10). The telescopic hole (7) is opened in the inner ring (2) and is connected to the raceway (3). The telescopic rod (8) is movably inserted between the inner circumferential walls of the telescopic hole (7). One end of the telescopic rod (8) is fixedly connected to the partition block (6), and the other end of the telescopic rod (8) is inserted into a slanted groove (11). The compression sleeve (9) is fixedly connected to the circumferential surface of the telescopic rod (8) and is located between the inner walls of the telescopic hole (7). The first spring (10) is sleeved on the circumferential surface of the telescopic rod (8) and is located between the inner walls of the telescopic hole (7). The first spring (10) is fixedly connected to one side of the compression sleeve (9) and is close to the partition block (6).

2. The bearing for an industrial robot according to claim 1, characterized in that, Each positioning component includes an inner ring groove (23), an outer ring groove (24), a positioning arc block (25), and an annular groove (28). The annular groove (28) is located outside the inner ring (2) and is connected to the gap between the outer ring (1) and the inner ring (2). The inner ring groove (23) is located on the inner wall of the annular groove (28), and the outer ring groove (24) is located on the inner wall of the outer ring (1). The outer ring groove (24) corresponds to the inner ring groove (23). There are two positioning arc blocks (25). The two positioning arc blocks (25) are fixedly connected to the inner wall of the annular groove (28) by bolts. The two positioning arc blocks (25) are located between the inner walls of the inner ring groove (23) and the outer ring groove (24).

3. The bearing for an industrial robot according to claim 2, characterized in that, The limiting assembly includes a limiting tooth groove (18), a pawl (19), a second spring (20), and a second internal hexagonal shaft (21). The limiting tooth groove (18) is opened on the circumferential surface of the rotating ring (12). The second internal hexagonal shaft (21) is rotatably connected between the inner walls of the ring groove (4). The internal hexagonal end of the second internal hexagonal shaft (21) extends to the inner wall of the annular groove (28). The pawl (19) is fixedly connected to the circumferential surface of the second internal hexagonal shaft (21). The pawl (19) engages with the limiting tooth groove (18). The second spring (20) is fixedly connected to the side end of the pawl (19), and the other end of the second spring (20) is fixedly connected to the inner wall of the ring groove (4).

4. The bearing for an industrial robot according to claim 3, characterized in that, The sealing assembly includes two plastic sealing rings (26), which are engaged and connected by being embedded in two annular grooves (28).

5. A bearing for an industrial robot according to claim 4, characterized in that, The outer ring (1), inner ring (2) and single plastic sealing ring (26) have concentric grooves (27) on their sides.

6. A bearing for an industrial robot according to claim 5, characterized in that, The outer ring (1) has a filling hole (29) on its circumferential surface. The filling hole (29) is connected to the raceway (3). The inner walls of the filling hole (29) are threaded together with an internal hexagon plug (30). The internal hexagon plug (30) and the outer ring (1) have a positioning mark (31).

7. A bearing for an industrial robot according to claim 6, characterized in that, The gap between the outer ring (1) and the inner ring (2) and the raceway (3) are filled with lubricant.

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