Bearing combined load application device
By designing a bearing joint load application device, the first and second rotary wheels apply radial and axial loads, combined with dynamic torque sensors, the problem of inaccurate detection of large-scale rotary bearings is solved, and high-precision bearing detection and operation guarantee is achieved.
Patent Information
- Application Number
- CN202210900729.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-07-28
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2042-07-28
AI Technical Summary
The prior art lacks detection equipment for applying axial and radial loads to large rotary bearings, resulting in inaccurate detection results and inability to simulate the actual application conditions of bearings.
A bearing combined load application device is designed, including a detection table, a movable shaft, a first turntable and a second turntable. The radial and axial loads are applied respectively by the first and second urge parts, and the instantaneous torque value is detected by the drive parts and the detector parts, and the torque force is accurately measured in combination with a dynamic torque sensor.
Accurate inspection of large rotary bearings under different load conditions is achieved, detection accuracy and efficiency are improved, and the bearings can operate normally in actual use and avoid slippage.
Smart Images
Figure CN115307905B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of bearing testing equipment, in particular to a bearing combined load applying device. Background Art
[0002] Slewing bearings, also known as turntable bearings, are large bearings that can withstand comprehensive loads and can simultaneously withstand large axial, radial loads and overturning moments. Currently, after large slewing bearings are produced, data measurements of the bearings are required. For example, when a large slewing bearing is in operation, the initial rotation of the bearing will generate an instantaneous torque. This torque is affected by the bearing size, the number of rolling elements, the friction torque between the rolling elements and the raceway, and the grease content inside the bearing. When an external drive device drives the large slewing bearing, a driving force greater than the torque value needs to be applied. Otherwise, the inner or outer ring of the bearing is prone to slippage, which in turn leads to large The tooling structure linked to the large slewing bearing fails in operation, so it is necessary to detect the torque value. The existing method for detecting the bearing is to measure it through a dynamometer, that is, to hang the dynamometer output hook in the threaded hole on the large slewing bearing, and detect the instantaneous torque value of the large slewing bearing by simple pulling and driving. However, the detection result is not accurate, and it is impossible to effectively apply axial or radial loads, so it is impossible to simulate the actual operating conditions of the bearing. The existing technology lacks a detection device that applies axial and radial loads to the large slewing bearing and detects the instantaneous torque value during its operation. Summary of the Invention
[0003] In view of the shortcomings of the existing technology, the present invention provides a bearing combined load application device to solve the problem in the existing technology of lacking a detection device for applying axial and radial loads to large slewing bearings and detecting the instantaneous torque value during their operation.
[0004] To achieve the above-mentioned purpose, the present invention provides a bearing combined load application device, including a testing platform, the end face of the testing platform is a testing surface for placing an external bearing to be tested, a movable shaft is movably arranged at the center of the testing surface, and the top of the movable shaft is detachably connected to a first turntable and a second turntable, the first turntable and the second turntable are coaxially stacked, and a plurality of first frame plates are circumferentially arranged on the outer peripheral wall of the first turntable, each of the first frame plates is provided with a first force-applying member for applying a radial load to the external bearing to be tested, and a plurality of second frame plates are circumferentially arranged on the outer peripheral wall of the second turntable, and each of the second frame plates is provided with a second force-applying member for applying an axial load to the external bearing to be tested, a driving member for driving the movable shaft to rotate axially and a detection member for detecting the instantaneous torque value of the external bearing to be tested when it rotates are provided on the movable shaft, and a fixing member for fixing the inner ring of the external bearing to be tested on the placement surface is provided on the testing platform.
[0005] The advantages of adopting the above technical solution are as follows: The operator places the large slewing bearing to be detected on the detection surface of the detection table. At this time, the movable shaft passes through the shaft hole of the large slewing bearing. Then, the operator fixes the inner ring of the bearing to be detected on the detection surface through the fixing piece. Then, the operator can operate the first force-applying piece to apply a radial load to the outer ring of the bearing to be detected or operate the second force-applying piece to apply an axial load to the outer ring of the bearing to be detected according to the actual working condition simulation requirements. The operator starts the driving piece to drive the movable shaft to rotate axially. When the movable shaft rotates axially, the movable shaft will drive the first turntable and the second turntable to rotate. And when the first force-applying piece applies a radial load or the second force-applying piece applies an axial load, there will inevitably be a frictional torque between the first force-applying piece or the second force-applying piece and the outer ring of the bearing to be detected, causing the first force-applying piece or the second force-applying piece to drive the outer ring of the bearing to be detected to rotate. At this time, the bearing operates and an instantaneous torque value appears. If this torque value is lower than the driving force output by the driving piece, the operator can increase the driving force output by the driving piece so that the movable shaft can continue to rotate and drive the outer ring of the bearing to be detected to rotate through the first turntable or the second turntable, avoiding the problem that the outer ring of the bearing cannot rotate or slips between the first force-applying piece or the second force-applying piece due to the driving force being lower than the bearing torque force. When the outer ring of the bearing to be detected rotates, the instantaneous torque force generated by the bearing operation will be fed back to the movable shaft, and the setting of the detection piece can accurately detect the value of this torque force, thereby detecting the torque value of the large slewing bearing under a specific radial or axial load. In the subsequent actual operation of the bearing, it is convenient for the operator to set the output torque of the external driving device to ensure that this output torque is greater than the torque value, and thus ensure that the bearing can operate smoothly during actual operation; in the above technology, a number of first support plates are circumferentially arranged on the outer peripheral wall of the first turntable, and a number of second support plates are circumferentially arranged on the outer peripheral wall of the second turntable, so that the first force-applying piece and the second force-applying piece can surround the bearing to be detected along the circumferential direction of the shaft hole of the bearing to be detected, and thus when the first force-applying piece or the second force-applying piece applies a load to the outer ring of the bearing to be detected, it can drive the outer ring of the bearing to be detected to rotate, thereby ensuring that the outer ring of the bearing can operate normally and there will be no intermittent rotation rate phenomenon; in the above technology, the setting of the detection piece can accurately detect the torque value, improving the detection accuracy and detection efficiency. The setting of the first force-applying piece facilitates the operator to adjust the radial load applied to the bearing to be detected, and the setting of the second force-applying piece facilitates the operator to adjust the axial load applied to the bearing to be detected. In the above technology, the operator can simultaneously apply axial and radial loads to the bearing to be detected to simulate the bearing operation efficiency under different load conditions or high-pressure axial and radial load conditions, and thus detect the instantaneous torque values of the bearing under different loads, improving the detection accuracy and detection efficiency.
[0006] The present invention is further configured such that: the distance between each of the first mounting plates and the adjacent first mounting plate is set to be the same, and the distance between each of the second mounting plates and the adjacent second mounting plate is set to be the same.
[0007] The advantages of adopting the above technical solution are as follows: in the above technology, the distance between every two first mounting plates is the same, and the distance between every two second mounting plates is the same, so that the first force applying member and the second force applying member can surround the bearing to be detected along the circumferential direction of the shaft hole of the bearing to be detected. Furthermore, when the first force applying member or the second force applying member applies a load to the outer ring of the bearing to be detected, it can drive the outer ring of the bearing to be detected to rotate, thereby ensuring that the outer ring of the bearing can operate normally and there will be no intermittent rotation rate phenomenon.
[0008] The present invention is further configured such that: the driving member includes an air spindle and a driving motor. A speed reducer is linked to the driving motor. The output end of the air spindle is detachably connected to the movable shaft, and the input end of the air spindle is connected to the output end of the driving motor. The detecting member includes a dynamic torque sensor disposed between the driving motor and the air spindle.
[0009] The advantages of adopting the above technical solution are as follows: when the driving motor operates in the above technology, it can drive the input end of the air spindle to rotate, so that the output end of the air spindle drives the movable shaft to perform axial rotation. At this time, the instantaneous torque force generated by the bearing to be detected will be fed back to the movable shaft and then conducted to the air spindle by the movable shaft, so that the dynamic torque sensor receives the torque force and generates a corresponding value. In the above technology, the setting of the air spindle can ensure that the torque force will not be greatly reduced by the air spindle when it is conducted to the air spindle, thereby ensuring that the torque force can be normally conducted to the receiving end of the dynamic torque sensor. The setting of the speed reducer in the above technology can ensure that the initial output torque of the driving motor is not too large, that is, the initial rotation speed of the driving motor is not too high, which is convenient for the operator to adjust the rotation speed of the driving motor and at the same time convenient for the operator to synchronously adjust the detection situation when the bearing to be detected is operating.
[0010] The present invention is further configured such that: the first force applying member includes a radial loading cylinder. A radial loading head for abutting against the outer peripheral wall of the outer ring of the bearing to be detected outside is connected to the output end of each radial loading cylinder. A plurality of first limiting holes are arranged along the length direction of each first mounting plate. A first fitting plate is arranged on the outer wall of each radial loading cylinder. A plurality of first fitting holes are opened on each first fitting plate. A first limiting screw is threadedly connected to each first fitting hole. One end of each first limiting screw is threadedly connected to the adjacent first limiting hole.
[0011] The advantages of adopting the above technical solution are as follows: When it is necessary to apply a radial load to the bearing to be detected, the operator starts the radial loading cylinder, so that the radial loading head on the radial loading cylinder penetrates and abuts against the outer peripheral wall of the outer ring of the bearing to be detected outside, thereby realizing the radial load applied to the bearing to be detected. At this time, a frictional torque is generated between the radial loading head and the outer peripheral wall of the outer ring of the bearing to be detected due to the action of the radial load. When the first turntable rotates, a number of radial loading cylinders will be linked, so that a number of radial loading heads drive the outer ring of the bearing to be detected to rotate. When the bearing to be detected rotates initially, an instantaneous torque force will be generated and transmitted to the first turntable through the radial loading head, thereby ensuring that the dynamic torque sensor can detect the corresponding torque value; in the above technology, the operator can move the radial loading cylinder, so that the distance between adjacent radial loading cylinders can be adjusted, and at the same time, the distance between the radial loading cylinder and the shaft hole of the first turntable can also be adjusted, so as to adapt to bearings to be detected with different sizes. After the radial loading cylinder is moved, the operator threadedly connects one end of the first limiting screw to the corresponding first mating hole and the other end to the corresponding first limiting hole, thereby realizing the fixation of the radial loading cylinder on the first frame plate.
[0012] The present invention is further provided that: the second force applying member includes an axial loading cylinder, and an axial loading head for abutting against the side of the outer ring of the bearing to be detected outside is connected to the output end of each axial loading cylinder. A through groove for the output end of an adjacent axial loading cylinder to penetrate is formed in each second frame plate along its length direction. Second limiting holes are arranged on both sides of each through groove along the length direction of the second frame plate. A second attaching plate is provided on each axial loading cylinder, and a number of second mating holes are formed in each second attaching plate. A second limiting screw is threadedly connected to each second mating hole, and one end of each second limiting screw is threadedly connected to the adjacent second limiting hole.
[0013] The advantages of adopting the above technical solution are as follows: When it is necessary to apply an axial load to the bearing to be detected, the operator starts the axial loading cylinder, so that the axial loading head on the axial loading cylinder penetrates and abuts against the side of the outer ring of the bearing to be detected outside, thereby realizing the radial load applied to the bearing to be detected. At this time, a frictional torque is generated between the axial loading head and the outer ring of the bearing to be detected due to the axial load, so that when the second turntable rotates, a number of axial loading cylinders will be linked, and a number of axial loading heads will drive the outer ring of the bearing to be detected to rotate. When the bearing to be detected rotates initially, an instantaneous torque force will be generated and transmitted to the second turntable through the radial loading head, thereby ensuring that the dynamic torque sensor can detect the corresponding torque value; in the above technology, the operator can move the axial loading cylinder, so that the distance between adjacent axial loading cylinders can be adjusted, and at the same time, the distance between the axial loading cylinder and the shaft hole of the second turntable can also be adjusted, so as to adapt to bearings to be detected with different sizes. After the axial loading cylinder is moved, the operator threadedly connects one end of the second limiting screw to the corresponding second matching hole and the other end to the corresponding second limiting hole, thereby realizing the fixation of the axial loading cylinder on the second mounting plate.
[0014] The present invention is further provided as follows: A number of fixing frames are arranged on the detection table, and the number of the fixing frames is circumferentially arranged on the detection table along the central axis of the placement surface. The fixing member includes a number of fixing rods, and the number of the fixing rods is arranged in one-to-one correspondence with the number of the fixing frames. A chute is opened on each fixing frame along its length direction, and a slider is slidably arranged in each chute along its length direction. A slot for the adjacent fixing rod to pass through is opened on each fixing frame along its length direction, and each slot is communicated with the adjacent and corresponding chute. The bottom end of each fixing rod penetrates into the corresponding slot and is connected with the adjacent slider. A pressing block is slidably arranged at the top end of each fixing rod along the height direction of the fixing rod. The bottom surface of each pressing block is an abutting surface for abutting against the side of the inner ring of the bearing to be detected outside. A limiting nut is threadedly connected to the top end of each fixing rod, and the limiting nut abuts against the top surface of the pressing block.
[0015] The advantages of adopting the above technical solution are as follows: When the operator needs to fix the inner ring of the bearing to be detected, the slider is slid so that the fixing rod slides in the slot until the fixing rod slides near the inner ring of the bearing to be detected. Then, the limiting nut is screwed in so that the limiting nut slides down on the fixing rod until the limiting nut abuts against the top surface of the pressing block. The limiting nut is continuously rotated, so that the limiting nut applies a force to the pressing block. This force will drive the pressing block to slide down on the fixing rod. However, when the pressing block abuts against the side of the inner ring of the bearing, it cannot slide down further, so that this force will act on the inner ring of the bearing through the pressing block, thereby realizing the fixation of the inner ring of the bearing to be detected and ensuring that the inner ring of the bearing will not be linked when the outer ring of the bearing rotates, resulting in the bearing to be detected shaking or disengaging from the placement surface on the placement surface. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a three-dimensional view of the present invention;
[0017] Figure 2 is a three-dimensional view of the movable shaft and its connection structure in the present invention;
[0018] Figure 3 is Figure 2 a three-dimensional view of the bottom perspective. DETAILED DESCRIPTION OF THE INVENTION
[0019] The present invention provides a bearing combined load application device, which includes a detection table. The end face of the detection table is a detection surface 11 for placing an external bearing to be detected. An activity shaft 2 is movably arranged at the center of the detection surface 11. A first turntable 3 and a second turntable 4 are detachably connected to the top of the activity shaft 2. The first turntable 3 and the second turntable 4 are coaxially stacked. A plurality of first shelf plates 31 are circumferentially arranged on the outer peripheral wall of the first turntable 3. A first force application member for applying a radial load to the external bearing to be detected is arranged on each of the first shelf plates 31. A plurality of second shelf plates 41 are circumferentially arranged on the outer peripheral wall of the second turntable 4. A second force application member for applying an axial load to the external bearing to be detected is arranged on each of the second shelf plates 41. A driving member for driving the activity shaft 2 to rotate axially and a detection member for detecting the instantaneous torque value when the external bearing to be detected rotates are arranged on the activity shaft 2. A fixing member for fixing the inner ring of the external bearing to be detected on the placement surface is arranged on the detection table. The distance between each adjacent pair of the first shelf plates 31 is set to be the same. The distance between each adjacent pair of the second shelf plates 41 is set to be the same. The driving member includes an air spindle 21 and a driving motor 22. A speed reducer is linked to the driving motor 22. The output end of the air spindle 21 is detachably connected to the activity shaft 2. The input end of the air spindle 21 is connected to the output end of the driving motor 22. The detection member includes a dynamic torque sensor 23 arranged between the driving motor 22 and the air spindle 21. The first force application member includes a radial loading cylinder 32. A radial loading head 33 for abutting against the outer peripheral wall of the outer ring of the external bearing to be detected is connected to the output end of each of the radial loading cylinders 32. A plurality of first limiting holes 311 are arranged along the length direction of each of the first shelf plates 31. A first fitting plate 34 is arranged on the outer wall of each of the radial loading cylinders 32. A plurality of first fitting holes 341 are opened on each of the first fitting plates 34. A first limiting screw 342 is threadedly connected to each of the first fitting holes 341. One end of each of the first limiting screws 342 is threadedly connected to the adjacent first limiting hole 311. The second force application member includes an axial loading cylinder 42. An axial loading head 43 for abutting against the side of the outer ring of the external bearing to be detected is connected to the output end of each of the axial loading cylinders 42. A through groove 44 for the output end of the adjacent axial loading cylinder 42 to pass through is opened along the length direction of each of the second shelf plates 41. Second limiting holes 411 are arranged along the length direction of the second shelf plates 41 on both sides of each of the through grooves 44. A second fitting plate 45 is arranged on each of the axial loading cylinders 42. A plurality of second fitting holes 451 are opened on each of the second fitting plates 45. A second limiting screw 452 is threadedly connected to each of the second fitting holes 451. One end of each of the second limiting screws 452 is threadedly connected to the adjacent second limiting hole 411.A plurality of fixing brackets 5 are arranged on the inspection table, and the plurality of fixing brackets 5 are circumferentially arranged on the inspection table along the central axis of the placement surface. The fixing member includes a plurality of fixing rods 53, and the plurality of fixing rods 53 are arranged in one-to-one correspondence with the plurality of fixing brackets 5. A chute 51 is formed in each fixing bracket 5 along its length direction, and a slider 52 is slidably arranged in each chute 51 along its length direction. A slot 511 for the adjacent fixing rod 53 to pass through is formed in each fixing bracket 5 along its length direction, and each slot 511 is communicated with the adjacent and corresponding chute 51. The bottom end of each fixing rod 53 penetrates into the corresponding slot 511 and is connected to the adjacent slider 52. A pressing block 54 is slidably arranged at the top end of each fixing rod 53 along the height direction of the fixing rod 53. The bottom surface of each pressing block 54 is a contact surface for abutting against the side of the inner ring of the bearing to be detected outside. A limit nut 55 is threadedly connected to the top end of each fixing rod 53, and the limit nut 55 abuts against the top surface of the pressing block 54.
[0020] The slewing bearing to be detected described in the above technology is marked as 6 in the accompanying drawings of the specification.
[0021] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.
Claims
1. A bearing combined load applying device, characterized in that: It includes a detection table. The end face of the detection table is a detection surface for placing a bearing to be detected from the outside. An activity shaft is movably arranged at the center of the detection surface. A first turntable and a second turntable are detachably connected to the top of the activity shaft. The first turntable and the second turntable are coaxially stacked. A number of first support plates are circumferentially arranged on the outer peripheral wall of the first turntable. Each of the first support plates is provided with a first force-applying member for applying a radial load to the bearing to be detected from the outside. A number of second support plates are circumferentially arranged on the outer peripheral wall of the second turntable. Each of the second support plates is provided with a second force-applying member for applying an axial load to the bearing to be detected from the outside. A driving member for driving the activity shaft to rotate axially and a detecting member for detecting the instantaneous torque value when the bearing to be detected from the outside rotates are arranged on the activity shaft. A fixing member for fixing the inner ring of the bearing to be detected from the outside on the placing surface is arranged on the detection table.
2. The combined load applying device for a bearing according to claim 1, wherein: The distance between each adjacent pair of the first support plates is set to be the same, and the distance between each adjacent pair of the second support plates is set to be the same.
3. The combined load applying device for a bearing according to claim 1, wherein: The driving member includes an air spindle and a driving motor. A speed reducer is linked to the driving motor. The output end of the air spindle is detachably connected to the activity shaft, and the input end of the air spindle is connected to the output end of the driving motor. The detecting member includes a dynamic torque sensor arranged between the driving motor and the air spindle.
4. A combined bearing load applying device according to claim 1, wherein: The first force-applying member includes a radial loading cylinder. A radial loading head for abutting against the outer peripheral wall of the outer ring of the bearing to be detected from the outside is connected to the output end of each radial loading cylinder. A number of first limiting holes are arranged along the length direction of each of the first support plates. A first fitting plate is arranged on the outer wall of each radial loading cylinder. A number of first fitting holes are formed in each of the first fitting plates. A first limiting screw is threadedly connected to each of the first fitting holes. One end of each first limiting screw is threadedly connected to the respective adjacent first limiting hole.
5. The combined load applying device for a bearing according to claim 1, wherein: The second force-applying member includes an axial loading cylinder. An axial loading head for abutting against the side of the outer ring of the bearing to be detected from the outside is connected to the output end of each axial loading cylinder. A through groove for the output end of the adjacent axial loading cylinder to pass through is formed along the length direction of each of the second support plates. Second limiting holes are arranged along the length direction of both sides of each through groove. A second fitting plate is arranged on each axial loading cylinder. A number of second fitting holes are formed in each of the second fitting plates. A second limiting screw is threadedly connected to each of the second fitting holes. One end of each second limiting screw is threadedly connected to the respective adjacent second limiting hole.
6. The combined load applying device for a bearing according to claim 1, wherein: A number of fixing frames are arranged on the inspection table, and the number of fixing frames are circumferentially arranged on the inspection table along the central axis of the placement surface. The fixing member includes a number of fixing rods, and the number of fixing rods are arranged in one-to-one correspondence with the number of fixing frames. A chute is formed along the length direction on each fixing frame, and a slider is slidably arranged along the length direction in each chute. A slot for a neighboring fixing rod to pass through is formed along the length direction on each fixing frame, and each slot is communicated with its neighboring and corresponding chute. The bottom end of each fixing rod penetrates into the corresponding slot and is connected to its neighboring slider. A pressing block is slidably arranged along the height direction of each fixing rod at the top end of each fixing rod. The bottom surface of each pressing block is a contact surface for abutting against the side of the inner ring of the bearing to be detected outside. A limit nut is threadedly connected to the top end of each fixing rod, and the limit nut abuts against the top surface of the pressing block.
Citation Information
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