A gap-adjustable heavy load thrust taper roller bearing device

Abstract

The application discloses a kind of gap adjustable heavy load thrust conical roller bearing devices, belong to the technical field of bearing, it includes thrust conical roller bearing, bearing seat, roller gap adjustment mechanism, screw jacking horizontal fine adjustment mechanism and drive unit;Bearing seat is constituted by vertical section and horizontal section;Roller gap adjustment mechanism includes control ring and adjustment ring;Screw jacking horizontal fine adjustment mechanism includes bearing tray;The application can accurately adjust the distance between the conical roller of thrust conical roller bearing and retainer and the height of bearing tray, solves the problem that existing heavy load thrust conical roller bearing cannot inhibit heavy load running deviation runout, roller and retainer wear easily cause equipment running instability, height deviation, can realize accurate multi-stage adjustment of bearing gap, adapt to long-term heavy load operation condition of industrial robot and other equipment, effectively guarantee equipment running stability.

Description

Technical Field

[0001] This invention relates to the technical field of bearings, and in particular to a heavy-duty thrust tapered roller bearing device with adjustable clearance. Background Technology

[0002] Thrust tapered roller bearings are a type of bearing structure specifically designed to withstand axial loads. Due to their excellent axial load-bearing capacity, they are widely used in the manufacture of industrial robots. They are commonly used in the waist region of industrial robots, where they support the upper body of the robot and therefore need to withstand enormous axial pressure over a long period of time. With the continuous operation of the industrial robot, the inner and outer rings, tapered rollers, and cage of the bearing will experience a certain degree of wear. This wear will cause the clearances in various parts of the bearing to gradually increase, thereby affecting the stability of the movement or rotation of the upper body of the industrial robot. Therefore, precise control and flexible adjustment of bearing clearances are crucial to ensuring the stable operation of such equipment.

[0003] For example, Chinese Patent No. CN118482096B discloses a bearing clearance adjustment device and a gear reducer, including a double-row tapered roller bearing component. The double-row tapered roller bearing component is provided with an inner ring, an outer ring, and tapered rollers. Compared with the prior art, after the double-row tapered roller bearing component of this application is installed and placed, it can squeeze one side of the outer ring by pressing and fixing the outer ring. At the same time, under the driving action of the adjustment components on both sides, the outer ring on the other side is also squeezed synchronously. The outer rings on both sides are squeezed at the same time, thereby adjusting the clearance between the outer ring and the tapered rollers synchronously. Compared with the traditional adjustment of the outer ring on one side, the bearing clearance of the two rows will be consistent.

[0004] However, the above-mentioned bearing clearance adjustment device still has some shortcomings in actual use: 1. First, the existing technology has a single form of clearance adjustment and insufficient adjustment dimensions. It only relies on external force to squeeze the outer ring of the bearing to achieve clearance adjustment. Therefore, the existing technology only has basic clearance adjustment function. After the bearing has been running under heavy load for a long time and has produced normal wear, it cannot effectively limit the radial displacement and running runout of the bearing, which will aggravate wear.

[0005] 2. In addition, existing devices usually adjust the clearance between the inner and outer rings of the bearing, and there is also a clearance between the cage and the tapered rollers. With the long-term heavy-load operation of the equipment, the wear between the cage and the tapered rollers will cause the tapered rollers to shift to the outside of the bearing axis, resulting in a smaller height of the inner and outer rings of the bearing, which makes the industrial robot shorter and reduces its operational stability.

[0006] In conclusion, there is still room for improvement in existing bearing clearance adjustment devices. Summary of the Invention

[0007] To address the limitations of existing bearing clearance adjustment methods and the inability to adjust the clearance between the cage and tapered rollers, this invention provides a heavy-duty thrust tapered roller bearing device with adjustable clearance, employing the following technical solution: A heavy-duty thrust tapered roller bearing assembly with adjustable clearance includes a thrust tapered roller bearing and a bearing housing fitted on the thrust tapered roller bearing, with a gasket provided at the bottom of the bearing housing; the thrust tapered roller bearing includes an inner bearing ring, an outer bearing ring, tapered rollers, and a cage; the end of the tapered roller away from the axis of the inner bearing ring has a tapered inclined surface structure. The roller clearance adjustment mechanism is located inside the bearing housing. It includes a control ring mounted on the outer ring of the bearing and an adjustment ring that moves up and down along the height direction of the outer ring of the bearing. The control ring and the adjustment ring mesh with each other, and the bottom of the adjustment ring slides in conjunction with the conical inclined surface structure of the tapered roller. The spiral lifting horizontal fine-tuning mechanism is located on the bearing housing. It includes a support tray that is slidably installed along the height direction on the vertical section of the bearing housing, and a drive unit that controls the height adjustment of the support tray.

[0008] Preferably, the bearing outer ring, tapered rollers, and bearing inner ring are arranged sequentially from top to bottom along the height direction of the bearing housing. The tapered rollers are rotatably arranged at equal intervals within the cage, and the cage is located between the bearing outer ring and the bearing inner ring.

[0009] Preferably, the outer wall of the adjusting ring is provided with several protrusions at equal intervals to facilitate rotation, and the bearing seat is provided with a movable groove for the adjusting ring to rotate.

[0010] Preferably, the drive unit includes a drive ring rotatably mounted on a pad, drive racks mounted at equal intervals on the drive ring, drive gears rotatably mounted at equal intervals on the pad, and a control shaft rotatably passing through a bearing seat and extending toward the bearing tray. The drive rack and drive gear are in one-to-one correspondence and meshing. One end of the control shaft is connected to the drive gear, and the other end is coaxially connected to an adjusting screw. A clamping frame is screwed onto the adjusting screw. The bearing housing has a circular groove for controlling the rotation of the shaft, and an installation groove for assembling the adjusting screw and raising / lowering the clamping frame. Symmetrical force-bearing columns are also installed in the installation groove of the bearing housing, and the clamping frame slides through the force-bearing columns.

[0011] Preferably, the gasket is further provided with a square groove, and a worm gear is rotatably installed in the square groove of the gasket. A worm wheel ring is sleeved on the outer periphery of the drive ring and rotates in the square groove. The worm wheel ring meshes with the worm gear.

[0012] Preferably, the control shaft has a two-section structure, consisting of a fixed shaft and a movable shaft. The fixed shaft and the movable shaft are respectively provided with a cross groove and a cross protrusion on their respective sides, and the cross groove and the cross protrusion cooperate with each other.

[0013] Preferably, the clamping frame has an integrated support protrusion at one end near the support tray, and the support tray has a corresponding support groove. The clamping frame is inserted into the support groove of the support tray through the support protrusion.

[0014] Preferably, the bearing housing and the gasket are connected by bolts.

[0015] Preferably, the contact surface between the adjusting ring and the tapered roller in sliding fit is coated with a wear-resistant lubricating coating.

[0016] In summary, this application includes at least one of the following beneficial technical effects: I. The roller clearance adjustment mechanism of the present invention can specifically correct the localized minute clearance deviation caused by the wear of tapered rollers and cages, solve the problems of bearing height change and equipment shaking caused by roller misalignment, and effectively improve the stability of the device.

[0017] Second, the drive unit of the present invention adopts a worm gear and rack transmission to convert manually input rotational power into stable and controllable displacement adjustment power, improve the accuracy of gap adjustment, and avoid the problems of uncontrollable adjustment range and poor accuracy of traditional adjustment methods. At the same time, the control shaft of the drive unit is a detachable structure, which can realize quick assembly and disassembly between bearing seats and gaskets, and improve the convenience of device installation and maintenance.

[0018] Third, the spiral lifting horizontal fine-tuning mechanism of the present invention can effectively compensate for the height changes caused by bearing wear by adjusting the height of the carrying tray, ensuring that the height of the entire equipment remains consistent, avoiding the impact of height changes on the processing accuracy of the entire device, and can also actively adjust the height of the carrying tray to perform customized height adjustments according to requirements. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a front view structural schematic diagram of the heavy-duty thrust tapered roller bearing device with adjustable clearance according to the present invention.

[0021] Figure 2 This is a partial sectional view of the heavy-duty thrust tapered roller bearing device with adjustable clearance according to the present invention.

[0022] Figure 3 This is a schematic diagram of the structure between the bearing housing and the gasket of the present invention.

[0023] Figure 4 This is an exploded view of the thrust tapered roller bearing of the present invention.

[0024] Figure 5This is a first-view structural schematic diagram of the roller clearance adjustment mechanism of the present invention.

[0025] Figure 6 This is a plan view of the roller clearance adjustment mechanism of the present invention.

[0026] Figure 7 This is the present invention. Figure 6 Enlarged view of the local structure at point A in the image.

[0027] Figure 8 This is a first-view structural diagram of the spiral lifting horizontal fine-tuning mechanism and the drive unit of the present invention.

[0028] Figure 9 This is a second-view structural diagram of the spiral lifting horizontal fine-tuning mechanism and the drive unit of the present invention.

[0029] Figure 10 This is a first-view structural schematic diagram of the driving unit of the present invention.

[0030] Figure 11 This is a schematic diagram of the second-view structure of the driving unit of the present invention.

[0031] Figure 12 This is a third-view structural diagram of the driving unit of the present invention.

[0032] Figure 13 This is a schematic diagram of the structure between the fixed rotating shaft, the movable rotating shaft, the cross groove, and the cross protrusion of the present invention.

[0033] Explanation of reference numerals in the attached figures: 1. Thrust tapered roller bearing; 2. Bearing housing; 20. Shim; 10. Inner ring of bearing; 11. Outer ring of bearing; 12. Tapered roller; 13. Cage; 3. Roller clearance adjustment mechanism; 31. Adjusting ring; 30. Control ring; 4. Spiral lifting horizontal fine-tuning mechanism; 40. Bearing tray; 42. Drive unit; 310. Protrusion; 311. Movable groove; 420. Drive ring; 421. Drive rack; 422. Drive gear; 423. Control shaft; 424. Adjusting screw; 425. Clamping bracket; 426. Mounting groove; 46. Force-bearing column; 200. Square groove; 44. Worm; 45. Worm wheel ring; 47. Fixed shaft; 48. Movable shaft; 470. Cross groove; 480. Cross protrusion; 400. Bearing protrusion; 401. Support groove. Detailed Implementation

[0034] The following combination Figures 1-13 This application will be described in further detail.

[0035] This application provides a heavy-duty thrust tapered roller bearing device with adjustable clearance, which can flexibly adjust the clearance of multiple parts of the bearing, while preventing the inner ring 10 of the bearing from running and the tapered roller 12 from shaking, ensuring stable operation of the equipment and extending the service life of the thrust tapered roller bearing 1.

[0036] Reference Figure 1 and Figure 2 As shown, this application provides a heavy-duty thrust tapered roller bearing device with adjustable clearance, including a thrust tapered roller bearing 1 and a bearing housing 2 sleeved on the thrust tapered roller bearing 1, with a shim 20 provided at the bottom of the bearing housing 2.

[0037] The thrust tapered roller bearing 1 is integrally nested and installed in the internal cavity of the bearing housing 2. A shim 20 structure is movably provided on the bottom end face of the bearing housing 2. The shim 20 serves as the bottom bearing base of the entire bearing assembly and the mounting base of various components. It not only provides a flat and stable support foundation for the upper bearing main structure, but also provides an installation foundation for various adjustment mechanisms, facilitating the installation and disassembly of the bearing housing 2 and the shim 20.

[0038] Additionally, refer to Figure 3 As shown, the bearing housing 2 and the gasket 20 are connected by bolts, which makes the installation and disassembly of the bearing housing 2 and the gasket 20 more convenient, and also improves the convenience of maintenance of the components inside the gasket 20; furthermore, it can also prevent the structure inside the gasket 20 from being exposed to the outside and damaged.

[0039] The shim 20 is set at the bottom of the bearing housing 2 and overlaps with the bearing housing 2. Both the bearing housing 2 and the shim 20 are provided with mounting holes. The entire device can be fixedly installed in the corresponding part of the industrial robot through the mounting holes to ensure the stability of the device installation and prevent loosening during equipment operation.

[0040] To better describe the heavy-duty thrust tapered roller bearing assembly with adjustable clearance in this application, the thrust tapered roller bearing 1 will be described first.

[0041] Reference Figure 4 As shown, the thrust tapered roller bearing 1 is the core load-bearing component of the device, used to bear the axial heavy load transmitted by the equipment. Specifically, it includes an inner ring 10, an outer ring 11, tapered rollers 12, and a cage 13. The outer ring 11, tapered rollers 12, and inner ring 10 are arranged sequentially from top to bottom along the height direction of the bearing housing 2. The tapered rollers 12 are rotatably arranged at equal intervals in the cage 13, and the cage 13 is located between the outer ring 11 and the inner ring 10.

[0042] Both the inner ring 10 and the outer ring 11 of the bearing are annular structures, coaxially arranged, with the inner ring 10 located at the bottom of the outer ring 11. Tapered rollers 12 are evenly distributed between the inner ring 10 and the outer ring 11, and refer to... Figure 4 and Figure 5 As shown, the tapered roller 12 has inclined contact with the outer ring 11 of the bearing, and planar contact with the inner ring 10 of the bearing. The shape of the tapered roller 12 is adapted to the raceway of the inner ring 10 and the outer ring of the bearing, which can achieve line contact, thereby improving the bearing's load-bearing capacity. The cage 13 is sleeved on the outside of the tapered roller 12 to evenly separate and limit the tapered roller 12, preventing the tapered roller 12 from shifting or colliding during operation, ensuring that the tapered roller 12 can roll stably, and thus ensuring the normal operation of the bearing.

[0043] Let's look again. Figure 5 As shown, the bearing housing 2 is mounted on the thrust tapered roller bearing 1, and the bearing housing 2 consists of a vertical section and a horizontal section.

[0044] The bearing housing 2 serves as the installation base and support component of the entire device, and is used to support the thrust tapered roller bearing 1 as well as various adjustment mechanisms and drive units 42. The bearing housing 2 has an overall L-shaped structure and is integrally formed by a vertical section and a horizontal section, which are set perpendicular to each other. The horizontal section is located at the bottom of the vertical section and plays the role of supporting the entire bearing housing 2 and installing related components. The vertical section is used to install the spiral lifting horizontal fine adjustment mechanism 4.

[0045] When the tapered roller 12 operates under heavy load for a long time, although there is oil lubrication between the tapered roller 12 and the cage 13, severe wear will still occur between them after long-term operation. This is especially true for the cage 13 located in the tail area of ​​the tapered roller 12. Because the tapered roller 12 has an inclined structure, the downward force generated by the heavy load causes the tapered roller 12 to always have an outward compressive force. This results in frequent wear between the tapered roller 12 and the cage 13. Over time, this will not only reduce the height of the industrial robot due to wear, affecting the accuracy of the industrial robot in subsequent operations, but also cause the industrial robot to wobble due to the increased clearance of the cage 13.

[0046] Reference Figure 5 and Figure 6 As shown, in order to solve the above problems, this application proposes a spiral lifting horizontal fine adjustment mechanism 4. The spiral lifting horizontal fine adjustment mechanism 4 is provided on the bearing seat 2, and includes a bearing tray 40 that is slidably installed on the vertical section of the bearing seat 2 along the height direction, and a drive unit 42 that controls the height adjustment of the bearing tray 40.

[0047] The upper part of the support tray 40 is equipped with the upper body of the industrial robot. If the thrust tapered roller bearing 1 wears, the drive unit 42 controls the support tray 40 to lift and lower along the axial direction of the thrust tapered roller bearing 1, which can compensate for the reduction in the preset height of the thrust tapered roller bearing 1 due to wear.

[0048] Furthermore, this application also proposes a roller clearance adjustment mechanism 3, which can also solve the problem of the preset height of the thrust tapered roller bearing 1 being reduced due to wear; see reference Figure 5 , Figure 6 and Figure 7 As shown, the roller clearance adjustment mechanism 3 is located inside the bearing housing 2. It includes a control ring 30 mounted on the outer ring 11 of the bearing and an adjustment ring 31 that moves up and down along the height direction of the outer ring 11 of the bearing. The end of the tapered roller 12 away from the axis of the inner ring 10 of the bearing has a tapered inclined surface structure. The control ring 30 and the adjustment ring 31 mesh with each other, and the bottom of the adjustment ring 31 slides in contact with the tapered inclined surface structure of the tapered roller 12.

[0049] The roller clearance adjustment mechanism 3 can compensate for the wear of the cage 13 by adjusting the ring 31. The adjusting ring 31 abuts against the tapered inclined surface structure of the tapered roller 12 and pushes the tapered roller 12 to keep it in an unworn state (i.e., the thrust tapered roller bearing 1 is brand new and unused), thereby preventing the bearing outer ring 11 from lowering in height.

[0050] Furthermore, the roller clearance adjustment mechanism 3 can also prevent the tapered roller 12 from affecting the operational stability of the industrial robot due to radial sway by abutting the tapered roller 12.

[0051] Furthermore, the contact surface of the adjusting ring 31 and the tapered roller 12 in sliding fit is coated with a wear-resistant lubricating coating. The wear-resistant lubricating coating can effectively reduce the frictional resistance during the relative sliding process, reduce mechanical wear, and at the same time have a long-lasting self-lubricating effect, which can continuously ensure the smoothness of the sliding fit, extend the service life of the structure, and maintain a precise clearance adjustment effect for a long time.

[0052] Looking back Figure 1 and Figure 2 As shown, the outer wall of the adjusting ring 31 is provided with several protrusions 310 at equal intervals to facilitate rotation, and the bearing seat 2 is provided with a movable groove 311 for the adjusting ring 31 to rotate.

[0053] The protrusion 310 structure provides a stable force point for manual or tool-assisted adjustment, which can reduce the difficulty of adjusting the rotation of the adjusting ring 31 and improve the convenience of adjustment. The side wall of the bearing seat 2 is provided with a movable groove 311 structure corresponding to the movement trajectory of the adjusting ring 31. The movable groove 311 provides sufficient reserved space for the circumferential rotation and vertical lifting of the adjusting ring 31, avoiding interference and limitation of the adjustment movement of the adjusting ring 31 by the bearing seat 2 body structure, and ensuring that the fine adjustment is completed smoothly.

[0054] Reference Figure 8 , Figure 9 and Figure 10 As shown, the drive unit 42 controls the spiral lifting horizontal fine-tuning mechanism 4, providing power support for the lifting and adjusting of the carrying tray 40.

[0055] The drive unit 42 includes a drive ring 420 rotatably mounted on the pad 20, a drive rack 421 equally spaced on the drive ring 420, a drive gear 422 equally spaced rotatably mounted on the pad 20, and a control shaft 423 rotatably passing through the pad 20 and the bearing seat 2 and extending toward the support tray 40.

[0056] During the circular rotation of the drive ring 420, all drive racks 421 will synchronously complete the circular motion, thereby driving the corresponding meshing drive gears 422 to synchronously complete the rotation action, thus achieving stable power transmission.

[0057] Reference Figure 10 and Figure 11 As shown, the drive rack 421 and the drive gear 422 correspond one-to-one and mesh with each other. One end of the control shaft 423 is connected to the drive gear 422, and the other end is coaxially connected to the adjusting screw 424. A clamping frame 425 is screwed onto the adjusting screw 424, and the carrying tray 40 is inserted into the clamping frame 425.

[0058] In addition, the clamping frame 425 has an integrated bearing protrusion 400 at one end near the bearing tray 40, and the bearing tray 40 has a corresponding supporting groove 401. The clamping frame 425 is inserted into the supporting groove 401 of the bearing tray 40 through the bearing protrusion 400. The clamping frame 425 can be driven by the threaded engagement with the adjusting screw 424 to complete the vertical lifting displacement along the rod of the adjusting screw 424, thereby driving the bearing tray 40 to complete the height adjustment action simultaneously.

[0059] Let's look again. Figure 8 , Figure 9 and Figure 11 As shown, a circular groove is provided on the bearing housing 2 for controlling the rotation of the rotating shaft 423, and an installation groove 426 is provided on the bearing housing 2 for assembling the adjusting screw 424 and raising and lowering the clamping frame 425.

[0060] The bearing housing 2 is also symmetrically equipped with force-bearing columns 46 in the mounting groove 426, and the clamping frame 425 slides through the force-bearing columns 46. The force-bearing columns 46 can accurately guide and stably support the vertical lifting and lowering movement of the clamping frame 425, effectively preventing horizontal deviation, swaying and deflection during the lifting and lowering process of the clamping frame 425, greatly improving the accuracy and stability of the gap adjustment operation, and at the same time avoiding the adjustment screw 424 from being directly stressed, which would cause the thread of the adjustment screw 424 to deform.

[0061] During operation, the external force controls the rotation of the drive ring 420. The drive ring 420 drives all the equally spaced drive racks 421 on the upper end face to move in a circular motion synchronously. The drive racks 421 mesh one by one, driving the corresponding drive gears 422 to rotate at a constant speed. The drive gears 422 drive the fixedly connected control shaft 423 to rotate synchronously. The adjusting screw 424 at the top of the control shaft 423 rotates synchronously. Through the threaded transmission, the clamping frame 425 moves vertically up and down along the force column 46. The clamping frame 425 drives the support tray 40 to complete the height adjustment synchronously through the precise engagement structure of the end integrated bearing protrusion 400 and the support groove 401 of the support tray 40. During the lifting and lowering process of the support tray 40, it directly drives the bearing inner ring 10 on the upper part to complete the vertical displacement, thereby realizing the correction and adjustment of the overall fit clearance between the bearing inner ring 10, the tapered roller 12, and the bearing outer ring 11.

[0062] Reference Figure 10 and Figure 11 As shown, a square groove 200 is provided on the plate structure of the gasket 20. A worm gear 44 is rotatably assembled in the internal space of the square groove 200 of the gasket 20. A worm wheel ring 45 is fixedly sleeved on the outer circumferential side wall of the drive ring 420. The worm wheel ring 45 is rotatably arranged inside the square groove 200 of the gasket 20. The tooth surface of the worm wheel ring 45 meshes with the tooth surface of the worm gear 44. By rotating the worm gear 44 at low speed, the worm wheel ring 45 can be driven to complete a precise low-speed circumferential rotation, thereby driving the drive ring 420 to rotate synchronously and smoothly, realizing the fine control of the power input of the drive unit 42 and effectively improving the accuracy of the overall clearance adjustment.

[0063] When the bearing operates under heavy load for a long time, the overall clearance increases and the fitting accuracy decreases. The operator rotates the worm gear 44 structure inside the square groove 200 of the shim 20. The worm gear 44 drives the worm wheel ring 45 to rotate at a low speed and accurately through tooth surface meshing. The worm wheel ring 45 synchronously drives the fixedly connected drive ring 420 to rotate smoothly. The drive ring 420 controls the height adjustment of the bearing tray 40 through the drive unit 42.

[0064] Reference Figure 12 and Figure 13As shown, the control shaft 423 adopts a two-section split assembly structure design, specifically composed of a fixed shaft 47 and a movable shaft 48. The ends of the fixed shaft 47 and the movable shaft 48 that are close to each other are respectively provided with a cross groove 470 and an integrally provided cross protrusion 480. The cross groove 470 and the cross protrusion 480 are matched with each other by a plug-in assembly method with matching size and shape. This can not only realize the synchronous rotation power transmission of the fixed shaft 47 and the movable shaft 48, ensuring the integrity of power transmission, but also adapt to the slight coaxiality deviation generated during the equipment assembly process, avoiding problems such as shaft transmission jamming, deformation under force, and breakage, and greatly improving the adaptability and stability of the transmission structure.

[0065] Work process: First, the bearing housing 2 and the thrust tapered roller bearing 1 are fixedly assembled and horizontally positioned by using the bottom shim 20 to ensure the stability and flatness of the overall installation of the device.

[0066] Step 2: When heavy-duty equipment such as industrial robots have been running continuously for a long time, and problems such as wear and tear causing increased clearance, misalignment of the tapered roller 12, and shaking during equipment operation occur in the internal components of the bearing, the operator first activates the roller clearance adjustment mechanism 3 by turning the outer protrusion 310 of the adjusting ring 31 according to the actual wear clearance size. By using the sliding cooperation between the lifting and lowering of the adjusting ring 31 and the inclined surface of the tapered roller 12, the local wear clearance between the tapered roller 12 and the cage 13 is precisely corrected, the misalignment of the tapered roller 12 is corrected, and the problem of bearing wear and shaking is solved.

[0067] Step 3: Then, by rotating the worm gear 44, and relying on the transmission of the worm gear 44, worm wheel ring 45, and gear rack, the bearing protrusion 400 is controlled to drive the bearing tray 40 to rise and fall, thereby completing the height adjustment of the bearing tray 40 and solving the problem of bearing height deviation.

[0068] Step 4: If abnormal gaps, inner ring runout, or roller wobbling occur again during subsequent operation of the equipment, the above operations can be repeated to make adjustments again, ensuring that the equipment always operates stably. The entire workflow is smooth and easy to operate, and it is suitable for the heavy-duty use requirements of industrial robots.

[0069] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A heavy-duty thrust tapered roller bearing device with adjustable clearance, characterized in that: It includes a thrust tapered roller bearing (1) and a bearing housing (2) fitted on the thrust tapered roller bearing (1), with a gasket (20) provided at the bottom of the bearing housing (2). The thrust tapered roller bearing (1) includes an inner ring (10), an outer ring (11), tapered rollers (12), and a cage (13). The tapered roller (12) has a tapered inclined surface structure at the end away from the axis of the inner ring (10) of the bearing; The roller clearance adjustment mechanism (3) is located inside the bearing housing (2). It includes a control ring (30) installed on the outer ring (11) of the bearing and an adjustment ring (31) that moves up and down along the height direction of the outer ring (11). The control ring (30) and the adjustment ring (31) mesh with each other, and the bottom of the adjustment ring (31) slides with the conical inclined surface structure of the tapered roller (12). The spiral lifting horizontal fine adjustment mechanism (4) is located on the bearing seat (2), and includes a bearing tray (40) that is slidably installed on the vertical section of the bearing seat (2) along the height direction, and a drive unit (42) that controls the height adjustment of the bearing tray (40).

2. The adjustable clearance heavy-duty thrust tapered roller bearing device according to claim 1, characterized in that: Along the height direction of the bearing housing (2), the outer ring (11), tapered rollers (12) and inner ring (10) of the bearing are arranged sequentially from top to bottom. The tapered rollers (12) are rotatably arranged in the cage (13) at equal intervals, and the cage (13) is located between the outer ring (11) and the inner ring (10).

3. The adjustable clearance heavy-duty thrust tapered roller bearing device according to claim 1, characterized in that: The outer wall of the adjusting ring (31) is provided with several protrusions (310) at equal intervals to facilitate rotation, and the bearing seat (2) is provided with a movable groove (311) for the adjusting ring (31) to rotate.

4. The adjustable clearance heavy-duty thrust tapered roller bearing device according to claim 1, characterized in that: The drive unit (42) includes a drive ring (420) rotatably mounted on a pad (20), a drive rack (421) equidistantly mounted on the drive ring (420), a drive gear (422) rotatably mounted on the pad (20) at equal intervals, and a control shaft (423) rotatably passing through the bearing seat (2) and extending toward the bearing tray (40). The drive rack (421) and the drive gear (422) are in one-to-one correspondence and mesh with each other. One end of the control shaft (423) is connected to the drive gear (422), and the other end is coaxially connected to the adjusting screw (424). A clamping frame (425) is screwed onto the adjusting screw (424). A circular groove is provided on the bearing housing (2) for controlling the rotation of the rotating shaft (423), and an installation groove (426) is provided on the bearing housing (2) for assembling the adjusting screw (424) and raising and lowering the clamping frame (425). The bearing housing (2) is also symmetrically equipped with force-bearing columns (46) in the mounting groove (426), and the clamping frame (425) slides through the force-bearing columns (46).

5. The adjustable clearance heavy-duty thrust tapered roller bearing device according to claim 4, characterized in that: A square groove (200) is also provided on the gasket (20). A worm (44) is rotatably installed in the square groove (200) of the gasket (20). A worm wheel ring (45) is fitted on the outer periphery of the drive ring (420) and rotates in the square groove (200). The worm wheel ring (45) meshes with the worm (44).

6. The adjustable clearance heavy-duty thrust tapered roller bearing device according to claim 4, characterized in that: The control shaft (423) has a two-section structure, consisting of a fixed shaft (47) and a movable shaft (48). The fixed shaft (47) and the movable shaft (48) are respectively provided with a cross groove (470) and a cross protrusion (480) on the side close to each other, and the cross groove (470) and the cross protrusion (480) cooperate with each other.

7. The adjustable clearance heavy-duty thrust tapered roller bearing device according to claim 4, characterized in that: The clamping frame (425) has an integrated support protrusion (400) at one end near the support tray (40), and the support tray (40) has a corresponding support groove (401). The clamping frame (425) is inserted into the support groove (401) of the support tray (40) through the support protrusion (400).

8. The adjustable clearance heavy-duty thrust tapered roller bearing device according to claim 1, characterized in that: The bearing housing (2) and the gasket (20) are connected by bolts.

9. The adjustable clearance heavy-duty thrust tapered roller bearing device according to claim 1, characterized in that: The contact surface between the adjusting ring (31) and the tapered roller (12) is coated with a wear-resistant lubricating coating.

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