Bearing Radial Load Detection Equipment

Abstract

The present invention discloses a bearing radial load detection device, which includes a test bench. A placement surface is provided on the test bench. A central connecting shaft is movably arranged at the center of the placement surface. A fixing frame is detachably arranged on the central connecting shaft. A force applying member for applying a radial load to the outer ring of the bearing to be detected outside is arranged on the fixing frame. An air spindle is arranged on the test bench. The output end of the air spindle is connected to the bottom of the central connecting shaft. A driving member for driving the air spindle to operate and driving the central connecting shaft to perform axial rotation and a detecting member for detecting the rotation torque value when the air spindle performs axial rotation are arranged on the test bench. A fixing member for fixing the inner ring of the bearing to be detected outside is also arranged on the test bench. The present invention solves the problem in the prior art that there is a lack of a detection equipment that can accurately detect the instantaneous torque value of a large slewing bearing and can apply a radial load to the bearing to be detected to simulate the actual working condition.

Description

Technical Field

[0001] The invention relates to the technical field of bearing detection equipment, and in particular to a bearing radial load detection equipment. Background Art

[0002] Slewing bearings, also known as turntable bearings, are large bearings that can withstand combined loads and can withstand large axial, radial loads and overturning moments at the same time. Slewing bearings generally have mounting holes, internal or external gears, lubricating oil holes and sealing devices, which can make the main engine design compact; currently, after large slewing bearings are produced, data measurement of the bearings is required. For example, when large slewing bearings are in operation, the initial rotation of the bearings will generate instantaneous torque, which is affected by the bearing size, the number of rolling elements, the friction torque between the rolling elements and the raceways, and the grease content inside the bearings. When an external drive device drives a 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 slipping, which in turn causes the tooling structure linked to the large slewing bearing to operate. Failure may even cause damage to the linked tooling structure. The existing method for detecting bearings is to measure them through a dynamometer, that is, the output hook of the dynamometer is hung in the threaded hole of the large slewing bearing, and the instantaneous torque value of the large slewing bearing is detected by simple pulling and driving. However, the detection result is not accurate and can only be used as a reference for operators, that is, only an approximate instantaneous torque range can be detected, and the range is also affected by many factors and is inaccurate. In addition, the existing technology lacks a detection device that can accurately detect the instantaneous torque value of a large slewing bearing and can apply a radial load to the bearing to be detected to simulate the actual working condition. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a bearing radial load detection device to solve the problem that the prior art lacks a detection equipment that can accurately detect the instantaneous torque value of a large slewing bearing and can apply a radial load to the bearing to be detected to simulate actual working conditions.

[0004] To achieve the above object, the present invention provides a bearing radial load detection device, including a test bench, on which there is a placement surface for placing an external bearing to be detected. At the center of the placement surface, a central connecting shaft is movably arranged. A fixing frame is detachably arranged on the central connecting shaft. A force applying member for applying a radial load to the outer ring of the external bearing to be detected is arranged on the fixing frame. An air spindle is arranged on the test bench. The output end of the air spindle is connected to the bottom of the central connecting shaft. A driving member for driving the air spindle to rotate and making it drive the central connecting shaft to rotate axially and a detecting member for detecting the rotation torque value when the air spindle rotates axially are arranged on the test bench. A fixing member for fixing the inner ring of the external bearing to be detected is also arranged on the test bench.

[0005] The advantages of adopting the above technical solution are as follows: The operator places the large slewing bearing to be detected on the placement surface of the test bench. At this time, the central connecting 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 placement surface through the fixing member. Then, the operator operates the force applying member to make the force applying member apply a radial load to the outer ring of the bearing to be detected. The operator starts the driving member to drive the air spindle to rotate. The rotation of the air spindle drives the central connecting shaft to rotate axially. When the central connecting shaft rotates axially, the central connecting shaft will drive the fixing frame to rotate. And when the force applying member applies a radial load, there will inevitably be a frictional torque between the force applying member and the outer ring of the bearing to be detected, causing the fixing frame to drive the force applying member 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 member, the operator can increase the driving force output by the driving member, so that the central connecting shaft can continue to rotate and drive the outer ring of the bearing to be detected to rotate through the fixing frame, avoiding the problem that the outer ring of the bearing cannot rotate or slips with the force applying member due to the driving force being lower than the bearing torque force. When the central connecting shaft drives the outer ring of the bearing to be detected to rotate through the fixing frame, the instantaneous torque force generated by the bearing operation will be fed back to the central connecting shaft and then to the air spindle by the central connecting shaft. The arrangement of the detecting member can accurately detect the torque force value, thereby detecting the torque value of the large slewing bearing under a specific radial load, which is convenient for the operator to set the output torque of the external driving device during the subsequent actual operation of the bearing, ensuring that the output torque is greater than the torque value, and thus ensuring that the bearing can operate smoothly during actual operation; in the above technology, the arrangement of the detecting member can accurately detect the torque value, improving the detection accuracy and detection efficiency. The arrangement of the force applying member facilitates the operator to adjust the radial load applied to the bearing to be detected, so as to simulate the bearing operation efficiency under different working conditions, and then detect the instantaneous torque value of the bearing under different radial loads, improving the detection accuracy and detection efficiency.

[0006] The present invention is further provided that: the force applying member includes a plurality of driving cylinders circumferentially and uniformly arranged on the fixed frame, and 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 driving cylinder. A fixed chassis is provided at the bottom of the central connecting shaft, and a mating chassis is provided on the outer wall of the output end of the air spindle. A plurality of connecting holes penetrate through the fixed chassis, and a limiting hole is provided at the corresponding position of the mating chassis for each connecting hole. The fixed chassis and the mating chassis are coaxially stacked, and a connecting rod for threadedly mating with the adjacent and corresponding limiting hole is threadedly connected to each connecting hole.

[0007] The advantages of adopting the above technical solution are as follows: after the operator places the large slewing bearing to be detected on the placement surface, the operator installs the central connecting shaft on the air spindle so that the central connecting shaft and the air spindle are coaxially arranged. At this time, the fixed chassis and the mating chassis are coaxially stacked. The operator screws a plurality of connecting rods into the corresponding connecting holes one by one, and then screws them into the adjacent and corresponding limiting holes, thereby realizing the fixed connection between the fixed chassis and the mating chassis and ensuring that the central connecting shaft can be driven to rotate when the air spindle rotates; after the central connecting shaft is installed, the operator can start the driving cylinders so that the radial loading heads on each driving cylinder can abut against the outer peripheral wall of the outer ring of the bearing to be detected outside, thereby applying a radial load to the outer ring of the bearing to simulate the radial load borne by the bearing under different working conditions, and then better detecting the instantaneous torque value of the bearing under different radial loads; in the above technology, a plurality of driving cylinders can be arranged circumferentially along the central connecting shaft on the fixed frame, thereby realizing the surrounding of the outer ring of the bearing to be detected, so that when the central connecting shaft rotates, a plurality of driving cylinders on the fixed frame can drive the outer ring of the bearing to be detected to rotate.

[0008] The present invention is further provided that: a motor frame is provided on the test bench, and a driving motor is provided on the motor frame. The output end of the driving motor is connected to the input end of the air spindle.

[0009] The advantages of adopting the above technical solution are as follows: when it is necessary to drive the central connecting shaft to rotate axially, the operator starts the driving motor so that the driving motor drives the input end of the air spindle to rotate. At this time, the output end of the air spindle will drive the central connecting shaft in a linkage manner and drive the central connecting shaft to rotate axially; the setting of the above technology ensures that the central connecting shaft can rotate normally and enables the fixed frame to drive the outer ring of the bearing to be detected to rotate.

[0010] The present invention is further provided that: the detection member is a dynamic torque sensor arranged between the output end of the driving motor and the input end of the air spindle.

[0011] The benefit of adopting the above technical solution is that when the bearing to be tested rotates, the instantaneous torque generated by its initial rotation can be fed back to the central connecting shaft, and then transmitted to the air main shaft by the central connecting shaft. At this time, the dynamic torque sensor on the air main shaft can sense and record the torque value, and the recorded torque value can be transmitted to the external intelligent center, thereby improving the detection efficiency and detection accuracy; the dynamic torque sensor in the above technology is an existing technology, so its structure and function will not be described in detail.

[0012] The present invention is further provided with: a fixing plate is arranged on the outer wall of each driving cylinder, each fixing plate is provided with a fixing hole, a plurality of matching holes are arranged on the placement surface, and each fixing hole is threadedly connected with a limiting bolt for threadedly matching with the respective adjacent matching holes.

[0013] The advantages of adopting the above technical solution are: the operator can move the driving cylinder so that the radial loading head on the driving cylinder is always in contact with the outer ring of the bearing to be tested, thereby adapting to bearings to be tested of different sizes. After the movement is completed, the operator can connect the matching hole and the fixing hole through the limit bolt, thereby fixing the fixing plate on the placement surface.

[0014] The present invention is further provided that: the fixing part includes a plurality of fixing blocks arranged on the test bench, each of the fixing blocks is provided with a fixing rod, each of the fixing rods is movably provided with a buckle plate, the bottom surface of the buckle plate is a buckle surface for contacting the side edge of the inner ring of the bearing to be tested by the outside world, and the top of the fixing rod is threadedly connected with a buckle bolt for pressing on the top surface of the buckle plate.

[0015] The benefit of adopting the above technical solution is that when the operator needs to fix the inner ring of the bearing to be tested, the operator only needs to slide the buckle plate so that the buckle plate buckles against the side of the inner ring of the bearing to be tested, and then screw in the buckle bolt to make the buckle bolt slide down the fixing rod until the buckle bolt buckles against the top surface of the buckle plate, and continue to rotate the buckle bolt so that the buckle bolt applies a force to the buckle plate, which will drive the buckle plate to slide down the fixing rod, but the buckle plate cannot continue to slide down when it buckles against the side of the inner ring of the bearing to be tested, so that the force will act on the inner ring of the bearing through the buckle plate, thereby achieving the fixation of the inner ring of the bearing to be tested, ensuring that when the outer ring of the bearing rotates, the inner ring of the bearing will not be linked to cause the bearing to be tested to shake on the placement surface or detach from the placement surface.

[0016] The present invention is further configured as follows: a slide groove is provided on the test bench corresponding to each fixed block position, each fixed block is slidably set in the corresponding slide groove, a through groove is provided on the test bench corresponding to each slide groove position, each through groove is connected to its corresponding and adjacent slide groove, each fixed rod passes through its adjacent through groove, and the through groove width is smaller than the slide groove width.

[0017] The benefits of adopting the above technical solution are: the operator can slide the fixed block to make the fixed rod slide on the slide groove along the length direction of the slide groove, thereby adjusting the spacing between adjacent fixed rods, and at the same time can adapt to bearings to be tested with different axial hole diameters, thereby increasing the fixing range, ensuring that bearings to be tested with different axial hole sizes can be fixed on the placement surface; in the above technology, the width of the groove is smaller than the width of the groove, so that the fixed block will not fall off the slide groove, ensuring that the fixed rod will not fall off the groove, thereby ensuring that the fixation of the inner ring of the bearing to be tested will not fail.

[0018] The present invention is further provided with: a swivel seat is detachably provided on the central connecting shaft, and a swivel plate is provided on the swivel seat for driving the outer ring of the external bearing to be detected to rotate synchronously when the central connecting shaft rotates axially; a connector is provided at one end of the swivel plate for plugging and mating with a threaded hole on the side of the outer ring of the external bearing to be detected.

[0019] The benefit of adopting the above technical solution is that before the bearing to be tested rotates, the operator inserts the connector on the swivel plate into the threaded hole on the side of the outer ring of the bearing to be tested, so that when the central connecting shaft rotates axially, the swivel plate can drive the outer ring of the bearing to be tested to rotate synchronously, thereby avoiding the outer ring of the bearing to be tested slipping due to the force applied by the central connecting shaft during the initial rotation being lower than the torque generated by the bearing to be tested, thereby avoiding the test results being affected and the corresponding device being damaged.

[0020] The present invention is further provided with: a slot is horizontally penetrated on the swivel seat for the swivel plate to pass through, the swivel plate is horizontally slidably arranged in the slot, a plurality of openings connected to the slot are arranged on the swivel seat, a locking rod is threadedly connected to each of the openings, and one end of each of the locking rods passes through the slot and is arranged to be in contact with the outer wall of the swivel plate.

[0021] The benefit of adopting the above technical solution is that the swivel plate can slide in the slot, thereby adjusting the distance between the connector and the swivel seat to adapt to bearings with different shaft hole sizes, ensuring that the bearings to be tested with different shaft hole diameters can rotate synchronously with the central connecting shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional view of the present invention;

[0023] Figure 2 A three-dimensional view of the test bench in the present invention;

[0024] Figure 3 It is an exploded three-dimensional view of the connection state of the central connecting shaft, the fixing frame and the air main shaft in the present invention. DETAILED DESCRIPTION

[0025] The present invention provides a bearing radial load detection device, including a test bench 1. A placement surface 11 for placing an external bearing to be detected is provided on the test bench 1. A central connecting shaft 2 is movably arranged at the center of the placement surface 11. A fixing frame 21 is detachably arranged on the central connecting shaft 2. A force applying member for applying a radial load to the outer ring of the external bearing to be detected is arranged on the fixing frame 21. An air spindle 3 is arranged on the test bench 1. The output end of the air spindle 3 is connected to the bottom of the central connecting shaft 2. A driving member for driving the air spindle 3 to operate and drive the central connecting shaft 2 to rotate axially and a detecting member for detecting the rotational torque value when the air spindle 3 rotates axially are arranged on the test bench 1. A fixing member for fixing the inner ring of the external bearing to be detected is also arranged on the test bench 1. The force applying member includes a plurality of driving cylinders 22 circumferentially and evenly arranged on the fixing frame 21. A radial loading head 23 for abutting against the outer peripheral wall of the external bearing to be detected is connected to the output end of each driving cylinder 22. A fixed chassis 24 is arranged at the bottom of the central connecting shaft 2. A mating chassis 31 is arranged on the outer wall of the output end of the air spindle 3. A plurality of connection holes 241 penetrate through the fixed chassis 24. A limiting hole 311 is provided at the position corresponding to each connection hole 241 on the mating chassis 31. The fixed chassis 24 and the mating chassis 31 are coaxially stacked. A connecting rod 312 for threadedly mating with the adjacent and corresponding limiting hole 311 is threadedly connected to each connection hole 241. A motor frame 4 is arranged on the test bench 1. A driving motor 41 is arranged on the motor frame 4. The output end of the driving motor 41 is connected to the input end of the air spindle 3. The detecting member is a dynamic torque sensor 42 arranged between the output end of the driving motor 41 and the input end of the air spindle 3. A fixing plate 221 is arranged on the outer wall of each driving cylinder 22. A fixing hole 222 is provided on each fixing plate 221. A plurality of mating holes 111 are arranged on the placement surface 11. A limiting bolt 112 for threadedly mating with the adjacent mating hole 111 is threadedly connected to each fixing hole 222. The fixing member includes a plurality of fixing blocks 5 arranged on the test bench 1. A fixing rod 51 is arranged on each fixing block 5. A butting plate 52 is movably arranged on each fixing rod 51. The bottom surface of the butting plate 52 is a butting surface for contacting the side of the inner ring of the external bearing to be detected. A butting bolt 53 for pressing against the top surface of the butting plate 52 is threadedly connected to the top of the fixing rod 51. A sliding groove 13 is provided on the test bench 1 at the position corresponding to each fixing block 5. Each fixing block 5 is slidably arranged in the corresponding sliding groove 13. A through groove 131 is provided on the test bench 1 at the position corresponding to each sliding groove 13. Each through groove 131 is communicated with the corresponding and adjacent sliding groove 13. Each fixing rod 51 passes through the adjacent through groove 131. The width diameter of the through groove 131 is smaller than the width diameter of the sliding groove 13.A rotary seat 6 is detachably arranged on the central connecting shaft 2. A rotary plate 61 is arranged on the rotary seat 6 and is used for driving the outer ring of the bearing to be detected outside to rotate synchronously when the central connecting shaft 2 rotates axially. One end of the rotary plate 61 is provided with a connecting head 62 for plugging and matching with a threaded hole on the side of the outer ring of the bearing to be detected outside. A slotted opening 63 for the rotary plate 61 to pass through is horizontally penetrated through the rotary seat 6. The rotary plate 61 is horizontally slidably arranged in the slotted opening 63. A plurality of openings communicating with the slotted opening 63 are formed in the rotary seat 6. A locking rod 64 is threadedly connected to each opening. One end of each locking rod 64 penetrates into the slotted opening 63 and is in contact and cooperation with the outer wall of the rotary plate 61.,

[0026] In the above technology, the large slewing bearing to be detected is marked as 7 in the attached drawings of the specification.

[0027] 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. The above embodiments and the descriptions in the specification only illustrate the principles 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 the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A bearing radial load detection device, characterized in that: It includes a test bench. A placement surface for placing the bearing to be detected from the outside is provided on the test bench. A central connecting shaft is movably arranged at the center of the placement surface. A fixing frame is detachably arranged on the central connecting shaft. A force applying member for applying a radial load to the outer ring of the bearing to be detected from the outside is arranged on the fixing frame. An air spindle is arranged on the test bench. The output end of the air spindle is connected to the bottom of the central connecting shaft. A driving member for driving the air spindle to operate and driving the central connecting shaft to rotate axially and a detecting member for detecting the rotation torque value when the air spindle rotates axially are arranged on the test bench. A fixing member for fixing the inner ring of the bearing to be detected from the outside is also arranged on the test bench. The force applying member includes a plurality of driving cylinders circumferentially and uniformly arranged on the fixing frame. A radial loading head for abutting against the outer peripheral wall of the bearing to be detected from the outside is connected to the output end of each driving cylinder. A fixed chassis is arranged at the bottom of the central connecting shaft. A mating chassis is arranged on the outer wall of the output end of the air spindle. A plurality of connecting holes penetrate through the fixed chassis. A limiting hole is provided at the position corresponding to each connecting hole on the mating chassis. The fixed chassis and the mating chassis are coaxially stacked. A connecting rod for threadedly mating with the adjacent and corresponding limiting hole is threadedly connected to each connecting hole. A motor frame is arranged on the test bench. A driving motor is arranged on the motor frame. The output end of the driving motor is connected to the input end of the air spindle. The detecting member is a dynamic torque sensor arranged between the output end of the driving motor and the input end of the air spindle.

2. The radial load detection device for a bearing according to claim 1, wherein: A fixing plate is arranged on the outer wall of each driving cylinder. A fixing hole is provided on each fixing plate. A plurality of mating holes are arranged on the placement surface. A limiting bolt for threadedly mating with the adjacent mating hole is threadedly connected to each fixing hole.

3. The radial load detection device for a bearing according to claim 1, wherein: The fixing member includes a plurality of fixing blocks arranged on the test bench. A fixing rod is arranged on each fixing block. A butting plate is movably arranged on each fixing rod. The bottom surface of the butting plate is a butting surface for contacting the side of the inner ring of the bearing to be detected from the outside. A butting bolt for pressing against the top surface of the butting plate is threadedly connected to the top of the fixing rod.

4. The bearing radial load detection device according to claim 3, characterized in that: A sliding groove is provided on the test bench at the position corresponding to each fixing block. Each fixing block is slidably arranged in the corresponding sliding groove. A through groove is provided on the test bench at the position corresponding to each sliding groove. Each through groove is communicated with the corresponding and adjacent sliding groove. Each fixing rod passes through the adjacent through groove. The width diameter of the through groove is smaller than the width diameter of the sliding groove.

5. The bearing radial load detection device according to claim 1, wherein: A swivel base is detachably arranged on the central connecting shaft. A swivel plate for driving the outer ring of the bearing to be detected from the outside to rotate synchronously when the central connecting shaft rotates axially is arranged on the swivel base. A connecting head for plugging and mating with the threaded hole on the side of the outer ring of the bearing to be detected from the outside is arranged at one end of the swivel plate.

6. The radial load detection device for a bearing according to claim 5, wherein: A slotted opening for the rotary plate to pass through is horizontally penetrated on the rotary base, the rotary plate is horizontally slidably arranged in the slotted opening, a plurality of through holes communicating with the slotted opening are formed on the rotary base, and a locking rod is threadedly connected to each of the through holes. One end of each locking rod penetrates into the slotted opening and is in contact and cooperation with the outer wall of the rotary plate.

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