Bearing Axial Load Detection Equipment

Abstract

The present invention discloses a bearing axial load detection device, which includes a base. An air spindle and a test stand are arranged on the base. The end face of the test stand is a placement surface. The air spindle is arranged at the center of the test stand. A central shaft is detachably connected to the output end of the air spindle. A linkage frame is detachably arranged on the central shaft. A force application member for applying an axial load to the outer ring of the bearing to be detected outside is arranged on the linkage frame. A fixing member is arranged on the test stand. A driving member for driving the input end of the air spindle to operate and making it drive the central shaft to perform axial rotation is arranged on the base. A dynamic torque sensor is arranged on the input end of the air spindle. A synchronizing member is also arranged on the linkage frame. The present invention solves the problem in the prior art that there is a lack of a measuring device that can apply an axial load to the bearing to simulate the working condition and measure the instantaneous torque value during its operation.

Description

Technical Field

[0001] The present invention relates to the technical field of bearing detection equipment, and particularly to a bearing axial load detection equipment. Background Art

[0002] Slewing bearings, also known as turntable bearings, are large bearings that can withstand combined loads and can simultaneously bear large axial, radial loads and overturning moments; in the prior art, after a large slewing bearing is produced, various data of it need to be measured, such as the instantaneous torque value of the bearing. When a large slewing bearing rotates, an instantaneous torque force will be generated during the initial rotation of the bearing. This torque force is affected by the bearing size, the number of rolling elements, the frictional torque between the rolling elements and the raceway, and the grease content inside the bearing. When an external driving device drives a large slewing bearing, a driving force greater than the value of this torque force needs to be applied, otherwise the inner or outer ring of the bearing is prone to slipping, which will lead to the failure of the operation of the bearing or its associated tooling equipment. In the prior art, the method for detecting the bearing is to measure it with a tensiometer, that is, to hang the output hook cable of the tensiometer in the threaded hole on the large slewing bearing and detect the instantaneous torque value of the large slewing bearing through simple pulling and driving, but the detection result is not accurate and can only serve as a reference for the operator. There is a lack of a detection equipment in the prior art 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 conditions. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides a bearing axial load detection equipment to solve the problem that there is a lack of a measuring device in the prior art that can apply an axial load to a bearing to simulate the working conditions and measure the instantaneous torque value during its operation.

[0004] To achieve the above object, the present invention provides a bearing axial load detection equipment, including a base, an air spindle and a test stand are arranged on the base. The end face of the test stand is a placement surface for placing an external bearing to be detected. The air spindle is arranged at the center of the test stand. A central shaft is detachably connected to the output end of the air spindle. A linkage frame is detachably arranged on the central shaft. A force applying member for applying an axial load to the outer ring of the external bearing to be detected is arranged on the linkage frame. A fixing member for fixing the inner ring of the external bearing to be detected on the placement surface is arranged on the test stand. A driving member for driving the input end of the air spindle to rotate and driving the central shaft to perform axial rotation is arranged on the base. A dynamic torque sensor for detecting the instantaneous torque value of the rotation of the outer ring of the external bearing to be detected is arranged on the input end of the air spindle. A synchronizing member for driving the outer ring of the external bearing to rotate synchronously when the central shaft performs axial rotation is also arranged on the linkage frame.

[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 stand. At this time, the central 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 piece. Then, the operator operates the force-applying piece to apply an axial load to the outer ring of the bearing to be detected. The operator starts the driving piece to drive the input end of the air spindle to rotate, so that the rotation of the air spindle drives the central shaft to perform axial rotation. When the central shaft performs axial rotation, the central shaft will drive the linkage frame to rotate. When the force-applying piece applies an axial load, there will inevitably be a frictional torque between the force-applying piece and the side of the outer ring of the bearing to be detected, causing the linkage frame to drive the 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 central shaft can continue to rotate and drive the outer ring of the bearing to be detected to rotate through the linkage frame, avoiding the problem that the outer ring of the bearing cannot rotate or slips with the force-applying piece due to the driving force being lower than the bearing torque force. When the bearing to be detected rotates, the instantaneous torque generated by its initial rotation can be fed back to the central shaft, and then transmitted to the air spindle by the central shaft. At this time, the dynamic torque sensor on the air spindle can sense this torque value and record it. The recorded torque value can be transmitted to the external intelligent center, thereby improving the detection efficiency and detection accuracy. When the bearing is actually used later, it is convenient for the operator to set the output torque of the external driving device to ensure that the output torque is greater than the torque value, thereby ensuring that the bearing can operate smoothly during actual use. The dynamic torque sensor in the above technology is a prior art, so its structure and function will not be described in detail; the setting of the force-applying piece in the above technology facilitates the operator to adjust the axial 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 axial loads, improving the detection accuracy and detection efficiency. The setting of the synchronizing piece in the above technology avoids the problem that the outer ring of the bearing to be detected slips due to the acting force applied during the initial rotation of the central shaft being lower than the torque force generated by the bearing to be detected, thereby avoiding the influence on the detection result and the damage of the corresponding device; the central shaft and the air spindle in the above technology are detachably connected, which facilitates the operator to place the bearing to be detected on the placement surface, making the entire placement process fast and simple, accelerating the preparation steps before detection, and thus improving the detection efficiency and detection accuracy.

[0006] The present invention is further provided that: the force-applying piece includes a plurality of driving cylinders arranged on the linkage frame, and a force-applying rod for abutting against the side of the outer ring of the bearing to be detected is connected to the output end of each driving cylinder.

[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 can start the driving cylinder, so that the force-applying rods on each driving cylinder can all abut against the outer ring side of the bearing to be detected outside, thereby applying an axial load to the outer ring of the bearing, so as to simulate the axial load borne by the bearing under different working conditions, and then better detect the instantaneous torque value of the bearing under different axial loads; in the above technology, several driving cylinders can be circumferentially arranged on the fixing frame along the central axis, so as to realize the circumferential arrangement along the axis hole direction of the bearing to be detected, so that when the central axis rotates, several driving cylinders on the fixing frame can drive the outer ring of the bearing to be detected to rotate.

[0008] The present invention is further provided that: corresponding to each force-applying rod position on the linkage frame, a chute for the force-applying rod to pass through is penetrated, and several of the chutes are circumferentially arranged on the end surface of the linkage frame along the central axis of the linkage frame. On both sides of each chute, a first opening is arranged along the length direction of the chute. A connecting plate is arranged on each driving cylinder, and several second openings are arranged on each connecting plate. A limit bolt is threadedly connected to each second opening, and each limit bolt is threadedly connected to the adjacent first opening.

[0009] The advantages of adopting the above technical solution are as follows: The operator can adjust the position of the driving cylinder on the linkage frame according to the size of the axis hole of the bearing to be detected. The operator moves the driving cylinder so that the force-applying rods of each driving cylinder can all pass through the chute and abut against the outer ring side of the bearing to be detected. After the driving cylinder is moved, the operator realizes the fixation of the connecting plate on the linkage frame by the threaded cooperation of the limit bolt with the second opening and the corresponding first opening. The setting of the above technology not only facilitates the operator to disassemble and assemble the driving cylinder, but also enables the driving cylinder to apply an axial load to bearings to be detected with different sizes, thereby improving the detection range and detection accuracy.

[0010] The present invention is further provided that: the fixing member includes several fixing rods arranged on the test stand. The several fixing rods are circumferentially arranged on the placement surface along the central axis of the test stand. A butting plate is slidably arranged on each fixing rod along the height direction of the fixing rod. The bottom surface of the butting plate is a butting surface for contacting the inner ring side of the bearing to be detected outside. A butting nut for butting against the top surface of the adjacent butting plate is threadedly connected to the top end of each fixing rod.

[0011] The benefits of adopting the above technical solution are: when the operator needs to fix the inner ring of the bearing to be tested, the operator slides the buckle plate so that the buckle plate buckles against the side of the inner ring of the bearing to be tested, and then screws in the buckle nut, so that the buckle nut slides down the fixed rod and buckles against the top surface of the buckle plate. The operator continues to rotate the buckle nut so that the buckle nut applies a force to the buckle plate, and the force drives the buckle plate to slide down the fixed 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 acts 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 the inner ring of the bearing will not be linked when the outer ring of the bearing rotates, causing the bearing to be tested to shake on the placement surface or detach from the placement surface, thereby ensuring the smooth progress of the entire testing process.

[0012] The present invention is further provided that: a slot is provided on the test frame corresponding to each fixed rod position, the bottom of the fixed rod is slidably set in the slot along the length direction of the slot, a through slot is provided on the test frame corresponding to each slot position, each of the through slots is connected to the respective adjacent slots, a slider is slidably set in each through slot, each of the sliders is connected to the bottom of the respective adjacent fixed rod, and the width of the slot is smaller than the width of the through slot.

[0013] The benefits of adopting the above technical solution are: when it is necessary to fix bearings to be tested of different sizes on the placement surface, the operator moves the fixing rod so that the slider at the bottom of the fixing rod slides in the through groove, thereby driving the position of the fixing rod to change, ensuring that bearings to be tested of different axial hole sizes can be fixed on the placement surface; in the above technology, the slot width is smaller than the through slot width, so that the fixing rod will not disengage from the through groove, ensuring that the bearing to be tested will not fail to be fixed.

[0014] The present invention further provides that: the driving member includes a driving motor arranged on a base, and the output end of the driving motor is connected to the input end of the air spindle.

[0015] The benefit of adopting the above technical solution is that the setting of the driving motor in the above technology enables the air spindle to normally drive the central shaft to rotate, thereby enabling the outer ring of the bearing to be tested to rotate smoothly, ensuring that there will be no errors in the detection process, and improving the detection efficiency and detection accuracy.

[0016] The present invention is further provided that: the top of the central shaft is detachably connected to a rotating shaft, the top of the rotating shaft horizontally passes through a limiting groove, the synchronous part includes a synchronous plate, the synchronous plate is provided with a connector for plugging and cooperating with a threaded hole on the side of the outer ring of the bearing to be detected, the synchronous plate is horizontally slidably arranged in the limiting groove, a plurality of limiting holes connected to the limiting groove are opened on the top of the rotating shaft, each of the limiting holes is threadedly connected with a locking rod, one end of the locking rod is inserted into the slot and is arranged to abut and cooperate with the outer wall of the synchronous plate.

[0017] The advantages of adopting the above technical solution are as follows: Before the bearing to be detected rotates, the operator first connects the rotating shaft to the top of the central shaft, and then inserts the connector on the synchronization plate into the threaded hole on the side of the outer ring of the bearing to be detected, so that when the central shaft rotates axially, the synchronization plate can drive the outer ring of the bearing to be detected to rotate synchronously, avoiding the phenomenon that the acting force applied during the initial rotation of the central shaft is lower than the torque force generated by the bearing to be detected, resulting in slippage of the outer ring of the bearing to be detected, thereby avoiding the influence on the detection result and also avoiding damage to the corresponding device. At the same time, the synchronization plate can be slidably arranged in the limit groove, enabling the operator to adjust the distance between the connector and the rotating shaft according to bearings with different shaft hole sizes, thereby adapting to bearings to be detected with different sizes. Description of the Drawings

[0018] Figure 1 It is a three-dimensional view of the present invention;

[0019] Figure 2 It is a three-dimensional view of the movable shaft and its connection structure in the present invention. Detailed Embodiment

[0020] The present invention provides a bearing axial load detection device, including a base 1, on which an air spindle 2 and a test stand 11 are arranged. The end face of the test stand 11 is a placement surface 111 for placing an external bearing to be detected. The air spindle 2 is arranged at the center of the test stand 11. A central shaft 21 is detachably connected to the output end of the air spindle 2. A linkage frame 3 is detachably arranged on the central shaft 21. A force application member for applying an axial load to the outer ring of the external bearing to be detected is arranged on the linkage frame 3. A fixing member for fixing the inner ring of the external bearing to be detected on the placement surface 111 is arranged on the test stand 11. A driving member for driving the input end of the air spindle 2 to rotate and making it drive the central shaft 21 to perform axial rotation is arranged on the base 1. A dynamic torque sensor 23 for detecting the instantaneous torque value of the rotation of the outer ring of the external bearing to be detected is arranged on the input end of the air spindle 2. A synchronizing member for driving the outer ring of the external bearing to perform synchronous rotation when the central shaft 21 performs axial rotation is further arranged on the linkage frame 3. The force application member includes a plurality of driving cylinders 24 arranged on the linkage frame 3. A force application rod 241 for abutting against the side of the outer ring of the external bearing to be detected is connected to the output end of each driving cylinder 24. A chute 31 for the force application rod 241 to pass through is penetrated through the linkage frame 3 at the position corresponding to each force application rod 241. A plurality of the chutes 31 are arranged on the end face of the linkage frame 3 in a circumferential direction around the central shaft 21 of the linkage frame 3. A first opening 32 is arranged on both sides of each chute 31 along the length direction of the chute 31. A connecting plate 33 is arranged on each driving cylinder 24. A plurality of second openings 331 are formed in each connecting plate 33. A limit bolt 34 is threadedly connected to each second opening 331. Each limit bolt 34 is threadedly connected to the adjacent first opening 32. The fixing member includes a plurality of fixing rods 4 arranged on the test stand 11. A plurality of the fixing rods 4 are arranged on the placement surface 111 in a circumferential direction around the central shaft 21 of the test stand 11. A butting plate 41 is slidably arranged on each fixing rod 4 along the height direction of the fixing rod 4. The bottom surface of the butting plate 41 is a butting surface for contacting the side of the inner ring of the external bearing to be detected. A butting nut 42 for butting against the top surface of the adjacent butting plate 41 is threadedly connected to the top end of each fixing rod 4. A slot 112 is formed in the test stand 11 at the position corresponding to each fixing rod 4. The bottom of the fixing rod 4 is slidably arranged in the slot 112 along the length direction of the slot 112. A through slot 113 is formed in the test stand 11 at the position corresponding to each slot 112. Each through slot 113 is communicated with the adjacent slot 112. A slider 43 is slidably arranged in each through slot 113. Each slider 43 is connected to the bottom of the adjacent fixing rod 4. The width diameter of the slot 112 is smaller than the width diameter of the through slot 113. The driving member includes a driving motor 5 arranged on the base 1. The output end of the driving motor 5 is connected to the input end of the air spindle 2.The top of the central shaft 21 is detachably connected to a rotating shaft 6, and the top of the rotating shaft 6 horizontally passes through a limiting groove 61. The synchronizer includes a synchronous plate 62, and the synchronous plate 62 is provided with a connector 63 for plugging and matching with a threaded hole on the side of the outer ring of the bearing to be detected. The synchronous plate 62 is horizontally slidably arranged in the limiting groove 61. The top of the rotating shaft 6 is provided with a plurality of limiting holes connected to the limiting groove 61, and each of the limiting holes is threadedly connected with a locking rod 64, and one end of the locking rod 64 penetrates the slot 112 and is arranged to abut against the outer wall of the synchronous plate 62.

[0021] The slewing bearing to be tested described in the above technology is marked as 7 in the accompanying drawings of the specification.

[0022] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention shall be defined by the attached claims and their equivalents.

Claims

1. A bearing axial load detection device, characterized in that: It includes a base, on which an air spindle and a test stand are provided. The end face of the test stand is a placement surface for placing a bearing to be detected from the outside. The air spindle is arranged at the center of the test stand. A central shaft is detachably connected to the output end of the air spindle. A linkage frame is detachably arranged on the central shaft. A force application member for applying an axial load to the outer ring of the bearing to be detected from the outside is arranged on the linkage frame. A fixing member for fixing the inner ring of the bearing to be detected from the outside on the placement surface is arranged on the test stand. A driving member for driving the input end of the air spindle to operate and making it drive the central shaft to rotate axially is arranged on the base. A dynamic torque sensor for detecting the instantaneous torque value of the rotation of the outer ring of the bearing to be detected from the outside is arranged on the input end of the air spindle. A synchronizing member for driving the outer ring of the bearing to be detected from the outside to rotate synchronously when the central shaft rotates axially is also arranged on the linkage frame. The force application member includes a number of driving cylinders arranged on the linkage frame. A force application rod 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 driving cylinder. A chute for the force application rod to pass through is penetrated through the linkage frame at the position corresponding to each force application rod. A number of the chutes are arranged circumferentially along the central axis of the linkage frame on the end face of the linkage frame. A first opening is arranged on both sides of each chute along the length direction of the chute. A connecting plate is arranged on each driving cylinder. A number of second openings are opened on each connecting plate. A limit bolt is threadedly connected to each second opening. Each limit bolt is threadedly connected to the adjacent first opening.

2. The axial load detection device for a bearing according to claim 1, characterized in that: The fixing member includes a number of fixing rods arranged on the test stand. A number of the fixing rods are arranged circumferentially along the central axis of the test stand on the placement surface. A butting plate is slidably arranged on each fixing rod along the height direction of the 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 nut for butting against the top surface of the adjacent butting plate is threadedly connected to the top end of each fixing rod.

3. The axial load detection device for a bearing according to claim 2, characterized in that: A slot is opened on the test stand at the position corresponding to each fixing rod. The bottom of the fixing rod is slidably arranged in the slot along the length direction of the slot. A through slot is opened on the test stand at the position corresponding to each slot. Each through slot is communicated with the adjacent slot. A slider is slidably arranged in each through slot. Each slider is connected to the bottom of the adjacent fixing rod. The width diameter of the slot is smaller than the width diameter of the through slot.

4. The axial load detection device for a bearing according to claim 1, wherein: The driving member includes a driving motor arranged on the base. The output end of the driving motor is connected to the input end of the air spindle.

5. The axial load detection device for a bearing according to claim 1, characterized in that: A rotating shaft is detachably connected to the top of the central shaft. A limiting slot is horizontally penetrated through the top of the rotating shaft. The synchronizing member includes a synchronizing plate. A connecting head for plugging and matching with a threaded hole on the side of the outer ring of the bearing to be detected from the outside is arranged on the synchronizing plate. The synchronizing plate is horizontally slidably arranged in the limiting slot. A number of limiting holes communicated with the limiting slot are opened at the top of the rotating shaft. A locking rod is threadedly connected to each limiting hole. One end of the locking rod penetrates into the slot and is in abutting cooperation with the outer wall of the synchronizing plate.

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