Bearing loading rotation testing machine

Abstract

The invention relates to the technical field of test equipment, in particular to a bearing loading and rotating test machine, which comprises a rack for equipment installation; the testing mechanism is arranged on the rack and comprises a loading table and a testing assembly, the loading table is fixedly connected with the rack, and a containing groove is formed in the end face, close to the testing assembly, of the loading table; the conveying mechanism is used for conveying the bearings, the loading and unloading mechanism comprises a pushing assembly, a power assembly, a taking assembly and a loading and unloading assembly, the taking unit comprises a connecting frame, a supporting plate and an abutting plate, through the design of the loading and unloading mechanism, loading of the bearings and taking down of the bearings after testing are completed are completed, automatic operation is achieved, and the working efficiency is improved. And through the design of the oil duct and the sponge, the inner ring of the bearing is lubricated synchronously in the process of disassembling the bearing, and subsequent treatment is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of testing equipment, in particular to a bearing loading rotation testing machine. Background Art

[0002] The bearing loading rotation tester, commonly known as a bearing testing machine or a bearing testing machine, is a device specifically used to test the performance of bearings. The bearing testing machine simulates the normal working state of the bearing to test the stability of the bearing's performance, fatigue life, wear resistance, etc. under the influence of certain forces and rotation speeds. This equipment is widely used in the fields of bearing manufacturing, quality inspection, and research and development. However, the bearing loading rotation tester in the prior art requires manual assembly of the bearing, has low detection efficiency, and cannot achieve continuous parts. In addition, due to the integrity of the test, the bearing must be fully loaded into the test area, which makes it difficult to remove the bearing. Summary of the invention

[0003] The technical problem to be solved by the present invention is: in order to overcome the problems in the prior art that the installation of bearings requires manual assembly by personnel, the detection efficiency is low, and continuous parts cannot be achieved, a bearing loading and rotation testing machine is provided.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a bearing loading rotation testing machine, comprising:

[0005] A rack for mounting equipment;

[0006] The testing mechanism is arranged on the frame, and includes a loading platform and a testing assembly. The loading platform is fixedly connected to the frame, a receiving groove is provided on one end surface of the loading platform close to the testing assembly, an extension cavity connected to the receiving groove is provided in the loading platform, and a step surface is formed between the receiving groove and the extension cavity;

[0007] The transmission mechanism is used to transport the bearings, and the transmission components are arranged on the frame.

[0008] The loading and unloading mechanism includes a pushing assembly, a power assembly, a picking assembly and a loading and unloading assembly. The pushing assembly is fixedly connected to the frame. The pushing assembly pushes the bearing on the transmission mechanism onto the picking assembly. The power assembly is used to provide power for the movement and rotation of the picking assembly. The movable end of the power assembly is transmission-connected to the picking assembly. The picking assembly includes a picking power piece and two picking units. The picking power piece is used to provide power for the two picking units to move closer to or farther from each other. The picking unit includes a connecting frame, a supporting plate and an abutting plate. The connecting frame is transmission-connected to the movable end of the picking unit. The abutting plate is rotationally connected to the top surface of the connecting frame. The abutting plate and the connecting frame are connected by a first elastic element. The first The elastic element is used to provide power for the resetting of the abutment plate. A limit portion is protruded on the connecting frame to limit the rotation range of the abutment plate. The support plate and the connecting frame are fixedly connected. The support plate is located below the abutment plate. The loading and unloading assembly includes a loading seat and a unloading power piece. The unloading power piece is movably connected to the frame. The loading seat is used to load the bearing between the abutment plate and the support plate. The loading seat is arranged on the unloading power piece. Through the design of the loading and unloading mechanism, the loading of the bearing is completed and the bearing is removed after the test is completed, thereby realizing automated operation and improving detection efficiency. Through the design of the oil channel and the sponge, the lubrication of the inner ring of the bearing is simultaneously achieved during the process of removing the bearing, which is convenient for subsequent processing.

[0009] It further includes a power assembly including a material picking transverse drive, a lifting drive and a rotating drive. The material picking transverse drive is used to provide power for the transverse movement of the material picking unit, the lifting drive is used to provide power for the lifting movement of the material picking unit, and the rotating drive is used to provide power for the directional rotation of the material picking unit. The material picking transverse drive is fixedly connected to the frame, the output end of the material picking transverse drive is fixedly connected to the lifting drive, the output end of the lifting drive is fixedly connected to the fixed end of the rotating drive, and the rotating end of the rotating drive is fixedly connected to the material picking power.

[0010] The connecting frame further comprises a fixed section, a traction section and an introduction section, the spacing between the introduction sections of the two connecting frames is smaller than the spacing between the fixed sections, and the fixed section and the introduction section are connected by the traction section;

[0011] The abutment plate is rotatably connected to the introduction section, and the support plate is fixedly connected to the fixed section.

[0012] In order to solve the problem that the bearing striker is easy to move after being hit, a clamping groove is further provided on the support plate, and a clamping block for supporting the outer ring of the bearing is slidably arranged in the clamping groove, and the clamping block and the support plate are connected by a second elastic element.

[0013] In order to solve the problem that the bearing striker is easy to move after being struck, it further includes that the clamping block is arranged in an inwardly inclined state from top to bottom or the second elastic element is arranged in an inwardly inclined state from top to bottom.

[0014] It further includes that the inner diameter of the extension cavity is smaller than the outer diameter of the bearing, and the inner diameter of the extension cavity is larger than the inner diameter of the bearing.

[0015] In order to solve the problem, the loading and unloading assembly further includes a third elastic element and a telescopic element, one end of the telescopic element is fixedly connected to the unloading power piece, and the other end is fixedly connected to the loading seat, the third elastic element is sleeved on the telescopic element, one end of the third elastic element is against the loading seat, and the other end is against the unloading power piece.

[0016] The bottom surface of the charging seat is further provided with a docking groove for accommodating the introduction section, the bottom surface of the charging seat has a docking surface matching the traction section, and the outer diameter of the charging seat is less than or equal to the inner diameter of the bearing.

[0017] It further includes an oil channel and a mounting cavity in the loading seat, a sponge is arranged in the mounting cavity, the sponge protrudes from the outer wall of the loading seat, the output end of the oil channel is connected to the mounting cavity, and a one-way valve is arranged on the input end of the oil channel.

[0018] The test assembly further includes a test drive, a test motor and a test shaft. The test drive is arranged on a frame. The output end of the test drive is connected to the test motor. The output shaft of the test motor is transmission-connected to the test shaft. The test shaft is coaxial with the loading platform, and the diameter of the test shaft matches the inner ring of the bearing.

[0019] The beneficial effects of the present invention are as follows: a bearing loading and rotation testing machine provided by the present invention completes the loading of the bearing and the removal of the bearing after the test is completed through the design of the loading and unloading mechanism, thereby realizing automated operation and improving the detection efficiency; and through the design of the oil channel and the sponge, the lubrication of the inner ring of the bearing is simultaneously achieved during the process of removing the bearing, which is convenient for subsequent processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a schematic diagram of the structure of the bearing of the present invention being located on the transmission mechanism;

[0022] Figure 2 The present invention Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 3 is a schematic structural diagram of the bearing of the present invention being located on an abutment plate;

[0024] Figure 4 The present invention Figure 3 A schematic diagram of the enlarged structure at B in the middle;

[0025] Figure 5It is a schematic diagram of the structure in which the bearing of the present invention is located on the abutment plate and moves to the bottom of the loading and unloading assembly;

[0026] Figure 6 It is a structural schematic diagram of the docking of the material taking unit and the material loading and unloading assembly of the present invention;

[0027] Figure 7 The present invention Figure 6 Schematic diagram of the enlarged structure at C in the middle;

[0028] Figure 8 It is a schematic diagram of the structure of the material taking unit after rotation of the present invention;

[0029] Fig. 9 The present invention Figure 8 Schematic diagram of the enlarged structure at D in the middle;

[0030] Fig.10 It is a structural schematic diagram of the docking of the material taking unit and the loading platform of the present invention;

[0031] Fig.11 The present invention Fig.10 Schematic diagram of the enlarged structure at E in the middle;

[0032] Fig.12 It is a schematic diagram of the structure of the bearing of the present invention located in the loading platform;

[0033] Fig.13 It is a schematic diagram of the structure of unloading the bearing in the loading platform of the present invention;

[0034] Fig.14 The present invention Fig.13 Schematic diagram of the enlarged structure at F in the middle.

[0035] In the figure: 1. Frame;

[0036] 2. Testing mechanism, 21. Loading platform, 211. Accommodating groove, 2111. Protrusion, 212. Extension cavity, 213. Step surface, 22. Testing assembly, 221. Testing driving member, 222. Testing motor, 223. Testing shaft;

[0037] 3. Transmission mechanism,

[0038] 4. Loading and unloading mechanism, 41. Pushing assembly, 42. Power assembly, 421. Material picking transverse driving member, 422. Lifting driving member, 423. Rotating driving member, 43. Material picking assembly, 431. Material picking power member, 432. Material picking unit, 4321. Connecting frame, 43211. Limiting part, 43212. Fixed section, 43213. Traction section, 43214. Introducing section, 4322. Support plate, 4322 1. Clamping groove, 4323. Abutment plate, 4324. First elastic element, 4325. Clamping block, 4326. Second elastic element, 44. Loading and unloading assembly, 441. Loading seat, 4411. Docking groove, 4412. Docking surface, 4413. Oil channel, 4414. Mounting cavity, 442. Unloading power part, 443. Third elastic element, 444. Telescopic element, 445. Sponge, 446. One-way valve. DETAILED DESCRIPTION

[0039] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0040] like Figure 1 Schematic diagram of the structure of the present invention, a bearing loading rotation testing machine, comprising:

[0041] Rack 1, which is used for equipment installation;

[0042] like Figure 1 As shown, the test mechanism 2 is arranged on the frame 1, and the test mechanism 2 includes a loading platform 21 and a test assembly 22. The loading platform 21 is fixedly connected to the frame 1, and a receiving groove 211 is provided on one end surface of the loading platform 21 close to the test assembly 22. An extension cavity 212 connected to the receiving groove 211 is provided in the loading platform 21, and a step surface 213 is formed between the receiving groove 211 and the extension cavity 212. The receiving groove 211 matches the outer ring of the bearing, and the bearing can be embedded in the receiving groove 211. The inner diameter of the extension cavity 212 is smaller than the outer diameter of the bearing, and the inner diameter of the extension cavity 212 is larger than the inner diameter of the bearing, and the step surface 213 is used to resist the bearing;

[0043] The test component 22 includes a test drive 221, a test motor 222 and a test shaft 223. The test drive 221 is arranged on the frame 1. The output end of the test drive 221 is connected to the test motor 222. The output shaft of the test motor 222 is connected to the test shaft 223 in transmission connection. The test shaft 223 is coaxial with the loading platform 21. The diameter of the test shaft 223 matches the inner ring of the bearing. The test component 22 includes a motor seat. The test motor 222 is fixed on the motor seat. The motor seat and the frame 1 are slidably connected. The test drive 221 is a power element such as a cylinder, a hydraulic cylinder, an electric push rod or a screw transmission mechanism. The test motor 222 is used to drive the test shaft 223 to rotate. The test shaft 223 is embedded in the inner ring of the bearing to start testing the bearing.

[0044] In another embodiment, the end of the receiving groove 211 has a protrusion 2111 protruding inwardly, and the protrusion 2111 is used to prevent the bearing from being disengaged when driven by the test shaft.

[0045] The transmission mechanism 3 is used to transport bearings. The transmission component is arranged on the frame 1. The transmission component can be a conveyor belt. The transmission component 3 includes a waste conveyor belt and a finished product conveyor belt. The transmission component 3 passes between the test component 22 and the loading platform 21. The material picking component 43 is located between the waste conveyor belt and the finished product conveyor belt.

[0046] like Figure 1 , Figure 2 As shown, the loading and unloading mechanism 4 includes a pushing assembly 41, a power assembly 42, a picking assembly 43 and a loading and unloading assembly 44. The pushing assembly 41 is fixedly connected to the frame 1. The pushing assembly 41 pushes the bearing on the transmission mechanism 3 onto the picking assembly 43. The pushing assembly 41 can be a power element such as a cylinder, a hydraulic cylinder, an electric push rod or a screw transmission mechanism.

[0047] like Figure 1As shown, the power assembly 42 is used to provide power for the movement and rotation of the material taking assembly 43. The movable end of the power assembly 42 is transmission-connected to the material taking assembly 43. The power assembly 42 includes a material taking transverse driving member 421, a lifting driving member 422 and a rotating driving member 423. The material taking transverse driving member 421 is used to provide power for the transverse movement of the material taking unit 432. The lifting driving member 422 is used to provide power for the lifting movement of the material taking unit 432. The rotating driving member 423 is used to provide power for the directional rotation of the material taking unit 432. The material taking transverse driving member 421 is fixedly connected to the frame 1. The output end of the moving part 421 is fixedly connected to the lifting driving part 422, the output end of the lifting driving part 422 is fixedly connected to the fixed end of the rotating driving part 423, the rotating end of the rotating driving part 423 is fixedly connected to the material picking power part 431, the material picking transverse driving part 421 can be a power element such as a cylinder, a hydraulic cylinder, an electric push rod or a screw transmission mechanism, the lifting driving part 422 can be a power element such as a cylinder, a hydraulic cylinder, an electric push rod or a screw transmission mechanism, the rotating driving part 423 can be a rotating power element such as a rotating seat or a turntable, and the rotating driving part 423 is used to align the material picking unit 432 with the loading platform 21.

[0048] like Figure 2 As shown, the material picking assembly 43 includes a material picking power piece 431 and two material picking units 432. The material picking power piece 431 is used to provide power for the two material picking units 432 to move closer to or farther away from each other. The material picking unit 432 includes a connecting frame 4321, a supporting plate 4322 and an abutting plate 4323. The connecting frame 4321 is transmission-connected to the movable end of the material picking unit 432. The abutting plate 4323 is rotationally connected to the top surface of the connecting frame 4321. The abutting plate 4323 and the connecting frame 4321 are connected by a first elastic element 4324. The first elastic element 4324 can be a gas spring, a rubber spring, a coil spring, etc. The first elastic element 4324 is used to abut the plate 4323. 323 is used to provide power for the reset of the abutment plate 4323, and the first elastic element 4324 is used to provide power for the reset of the abutment plate 4323. A limit portion 43211 is protruded on the connecting frame 4321 for limiting the rotation range of the abutment plate 4323. The limit portion 43211 enables the outer end of the abutment plate 4323 to only rotate toward the direction close to the connecting frame 4321. The support plate 4322 and the connecting frame 4321 are fixedly connected, and the support plate 4322 is located below the abutment plate 4323. The material picking power part 431 can be a pneumatic clamp, a cylinder, a hydraulic cylinder or a screw transmission mechanism. The screw of the screw transmission mechanism has two threads with opposite spiral directions, and the cylinder or hydraulic cylinder corresponds to a material picking unit.

[0049] like Figure 2As shown, the connecting frame 4321 includes a fixed section 43212, a traction section 43213 and an introduction section 43214. The distance between the introduction sections 43214 of the two connecting frames 4321 is smaller than the distance between the fixed sections 43212. The fixed sections 43212 and the introduction sections 43214 are connected by the traction section 43213. The distance between the outer ends of the two abutment plates 4323 is larger than the distance between the outer ends of the fixed sections 43212.

[0050] The abutment plate 4323 and the introduction section 43214 are rotatably connected, and the support plate 4322 and the fixed section 43212 are fixedly connected.

[0051] like Figure 2 As shown, a clamping groove 43221 is provided on the support plate 4322, and a clamping block 4325 for supporting the outer ring of the bearing is slidably arranged in the clamping groove 43221. The clamping block 4325 and the support plate 4322 are connected by a second elastic element 4326. The second elastic element 4326 can be a gas spring, a rubber spring, a coil spring, etc. The clamping groove 43221 can accommodate the clamping block 4325, so that the clamping block 4325 is integrated into the clamping groove 43221.

[0052] The clamping block 4325 is arranged in an inwardly inclined state from top to bottom, or the second elastic element 4326 is arranged in an inwardly inclined state from top to bottom, so that the clamping block 4325 abuts against the outer ring of the bearing, and the inclination angle of the clamping block 4325 or the second elastic element 4326 is 1°-5°.

[0053] like Figure 7 As shown, the loading and unloading assembly 44 includes a loading seat 441 and a unloading power piece 442. The unloading power piece 442 is movably connected to the frame 1. The loading seat 441 is used to install the bearing between the abutment plate 4323 and the support plate 4322. The loading seat 441 is arranged on the unloading power piece 442. The unloading power piece 442 can be a pneumatic clamp, a cylinder, a hydraulic cylinder or a screw transmission mechanism. The screw of the screw transmission mechanism has two threads with opposite spiral directions. The cylinder or hydraulic cylinder corresponds to one A unloading claw, the unloading power member 442 and the frame 1 are connected via a unloading transverse moving member and a unloading lifting member, the unloading transverse moving member and the frame are fixedly connected, the output end of the unloading transverse moving member is fixedly connected to the unloading lifting member, the output end of the unloading lifting member is fixedly connected to the unloading power member 442, the unloading transverse moving member can be a power element such as a cylinder, a hydraulic cylinder, an electric push rod or a screw transmission mechanism, and the unloading lifting member can be a power element such as a cylinder, a hydraulic cylinder, an electric push rod or a screw transmission mechanism.

[0054] like Figure 7As shown, the loading and unloading assembly 44 includes a third elastic element 443 and a telescopic element 444. One end of the telescopic element 444 is fixedly connected to the unloading power piece 442, and the other end is fixedly connected to the loading seat 441. The third elastic element 443 is sleeved on the telescopic element 444. One end of the third elastic element 443 abuts against the loading seat 441, and the other end abuts against the unloading power piece 442. The third elastic element 443 can be a spring, and the spring can be a gas spring, a rubber spring, a coil spring, etc. The telescopic element 444 is a telescopic rod, a pneumatic telescopic rod, a gas spring, etc., so that there is a moving gap between the loading platform 21 and the picking unit 432.

[0055] like Figure 7 As shown, a docking groove 4411 is provided on the bottom surface of the loading seat 441 for accommodating the introduction section 43214. The bottom surface of the loading seat 441 has a docking surface 4412 matching the traction section 43213. The outer diameter of the loading seat 441 is less than or equal to the inner diameter of the bearing.

[0056] like Figure 7 As shown, an oil passage 4413 and an installation cavity 4414 are provided in the loading seat 441, a sponge 445 is arranged in the installation cavity 4414, the sponge 445 protrudes from the outer wall of the loading seat 441, the output end of the oil passage 4413 is connected with the installation cavity 4414, a one-way valve 446 is arranged on the input end of the oil passage 4413, and the one-way valve 446 is designed through the oil passage 4413 and the sponge 446 to achieve lubrication of the inner ring of the bearing during the process of removing the bearing, which is convenient for subsequent processing.

[0057] The oil in the oil passage 4414 and the sponge 445 is input by an oil pump or an oil tank arranged at a high place. The one-way valve 446 is used to prevent the oil from flowing back. The output end of the oil pump is connected to the one-way valve, and the oil tank is connected to the one-way valve through an oil pipe.

[0058] like Figure 1 As shown, the bearing is located on the finished product conveyor belt of the transmission mechanism 3 and moves until the bearing to be tested moves to the material picking unit 432. The pushing assembly 41 is started to push the bearing to be tested onto the material picking unit 432. Since the abutment plate 4323 supports the bearing, the material picking units 432 can be close to each other when supporting the bearing, so the bearing will not be inserted into a single material picking unit 432. When the two material picking units 432 are close to each other, the distance between the outer ends of the two support plates 4322 is greater than the outer diameter of the bearing.

[0059] like Figure 3 , Figure 4 As described above, when the bearing falls onto the abutment plate 4323 of the material taking unit 432, due to the elastic force of the first elastic element 4324, the abutment plate 4323 supports the bearing, and at this time, the abutment plate 4324 is in an inclined state, which can also play a role in fixing the bearing to prevent it from falling during the movement. Figure 5 As shown, the material taking transverse driving member 421 is started so that the material taking unit 432 with a bearing moves to the bottom of the loading and unloading assembly 44, as shown in FIG. Figure 6 , Figure 7 As shown, the lifting drive member 422 is started to make the material picking assembly 43 rise, and the material picking unit 432 gradually approaches the loading seat 441. When the loading seat 441 contacts the bearing and the material picking unit 432, the bearing moves downward and falls on the support plate 4322. It can also be supported by the cooperation of the unloading power member 442 to press the bearing so that it moves downward and falls on the support plate 4322 until the docking surface 4412 of the loading seat 441 engages the traction section 42313. At this time, the material picking unit 432 is located in the docking groove 4411, and the abutment plate 4323 rotates and embeds into the introduction section 43214 of the connecting frame 4321; due to the power of falling, the bearing can be embedded between the clamping block 4323 and the connecting frame 4321. It can also be supported by the cooperation of the unloading power member 442 to press the bearing so that it is embedded between the clamping block 4325 and the connecting frame 4321. The clamping block 4325 can prevent the bearing from shaking at will during the movement, such as Figure 8 , Fig. 9 As shown, after the bearing is fixed on the support plate 4322, the material taking assembly 43 first descends (during this process, the loading and unloading assembly 44 moves to avoid the material taking assembly 43) and then rises, and then the rotating driving member 423 is started to align the bearing with the loading platform 21, as shown in FIG. Fig.10 , Fig.11 As shown, the material picking transverse driving member 421 is started to make the bearing close to the loading platform 21 until the bearing is embedded in the receiving groove 211 of the loading platform 21. During this process, the clamping block 4325 retracts into the clamping groove 43221 to release the micro-fixation of the bearing. The material picking transverse driving member 421 is started again to make the material picking assembly 44 detach from the device platform and reset (as shown in FIG. Fig.12 As shown in the figure, during the disengagement process, since the inner wall surface of the bearing is smooth, the force of the abutment plate 4323 against the bearing is not enough to drive the bearing to disengage, the test drive 221 is started to make the test shaft 223 approach and embed into the inner ring of the bearing, the test motor 222 is started to make the test shaft 223 rotate, and the loading rotation test of the bearing begins. After the test is completed, the test drive 221 is started to make the test shaft 223 disengage from the bearing, and the matching force between the test shaft 223 and the bearing is less than the matching force between the bearing and the receiving groove 211, so the bearing is still embedded in the receiving groove 211, as shown in the figure. Fig.13 , Fig.14As described above, after the material picking assembly 43 is aligned with the loading platform 21, the material picking unit 432 moves into the accommodating groove 211 and reaches the extension cavity 212. During the extension process, the material picking unit 432 is in a close state. When the support plate 4322 contacts the loading platform 21, the material picking power member 431 is started to make the material picking units 432 move away from each other until the abutment plate 4323 contacts the inner wall of the extension cavity 212. The material picking transverse driving member 421 is started to make the material picking unit 21 move away from the loading platform 21. At this time, due to the limitation of the limiting portion 43211, the abutment plate 4323 abuts against the bearing and drives The bearing falls off the receiving groove 211, and after separation, the unloading seat 411 and the picking unit 432 are docked again, and the unloading power member 442 grabs the bearing and moves upward. During the upward movement of the bearing, the inner ring of the bearing is lubricated by the sponge to achieve self-lubrication of the bearing. Since the loading platform 441 and the unloading power member 442 have an elastic moving distance, the inner ring of the bearing and the loading platform 441 are in contact to complete the separation. The loading and unloading component 44 moves the bearing to the waste conveyor belt or the finished product conveyor belt of the transmission component 3 according to the test results, releases the clamping, and the bearing falls onto the transmission mechanism 3.

[0060] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A bearing loading rotation testing machine, characterized in that: include: A rack (1) for mounting equipment; A testing mechanism (2) is arranged on a frame (1), the testing mechanism (2) comprising a loading platform (21) and a testing assembly (22), the loading platform (21) being fixedly connected to the frame (1), a receiving groove (211) being provided on an end surface of the loading platform (21) close to the testing assembly (22), an extension cavity (212) being provided in the loading platform (21) and communicating with the receiving groove (211), and a step surface (213) being formed between the receiving groove (211) and the extension cavity (212); A transmission mechanism (3) for transporting bearings, wherein the transmission assembly is arranged on the frame (1). The loading and unloading mechanism (4) comprises a pushing assembly (41), a power assembly (42), a material taking assembly (43) and a loading and unloading assembly (44); the pushing assembly (41) is fixedly connected to the frame (1); the pushing assembly (41) pushes the bearing on the transmission mechanism (3) onto the material taking assembly (43); the power assembly (42) is used to provide power for the movement and rotation of the material taking assembly (43); the movable end of the power assembly (42) and the material taking assembly (44) are connected to each other. 3) transmission connection, the material taking assembly (43) comprises a material taking power piece (431) and two material taking units (432), the material taking power piece (431) is used to provide power for the two material taking units (432) to move closer to or farther away from each other, the material taking units (432) comprise a connecting frame (4321), a supporting plate (4322) and an abutting plate (4323), the connecting frame (4321) and the movable end of the material taking unit (432) are transmission connected, the abutting plate (4323) The support plate (4323) and the connecting frame (4321) are rotatably connected to each other, and the abutting plate (4323) and the connecting frame (4321) are connected via a first elastic element (4324), the first elastic element (4324) is used to provide power for resetting the abutting plate (4323), and a limiting portion (43211) is protruded on the connecting frame (4321) for limiting the rotation range of the abutting plate (4323). The support plate (4322) is fixedly connected to the support frame (4321), the support plate (4322) is located below the abutment plate (4323), the loading and unloading assembly (44) comprises a loading seat (441) and a unloading power piece (442), the unloading power piece (442) and the frame (1) are movably connected, the loading seat (441) is used to install the bearing between the abutment plate (4323) and the support plate (4322), and the loading seat (441) is arranged on the unloading power piece (442).

2. A bearing loading rotation testing machine as claimed in claim 1, characterized in that: The power assembly (42) comprises a material picking transverse driving member (421), a lifting driving member (422) and a rotating driving member (423); the material picking transverse driving member (421) is used to provide power for the transverse movement of the material picking unit (432); the lifting driving member (422) is used to provide power for the lifting movement of the material picking unit (432); the rotating driving member (423) is used to provide power for the directional rotation of the material picking unit (432); the material picking transverse driving member (421) is fixedly connected to the frame (1); the output end of the material picking transverse driving member (421) is fixedly connected to the lifting driving member (422); the output end of the lifting driving member (422) is fixedly connected to the fixed end of the rotating driving member (423); the rotating end of the rotating driving member (423) is fixedly connected to the material picking power member (431).

3. A bearing loading rotation testing machine as claimed in claim 1, characterized in that: The connecting frame (4321) comprises a fixed section (43212), a traction section (43213) and an introduction section (43214); the distance between the introduction sections (43214) of the two connecting frames (4321) is smaller than the distance between the fixed sections (43212); the fixed section (43212) and the introduction section (43214) are connected via the traction section (43213); The abutment plate (4323) and the introduction section (43214) are rotatably connected, and the support plate (4322) and the fixed section (43212) are fixedly connected.

4. A bearing loading rotation testing machine as claimed in claim 1, characterized in that: The support plate (4322) is provided with a clamping groove (43221), and a clamping block (4325) for supporting the outer ring of the bearing is slidably arranged in the clamping groove (43221), and the clamping block (4325) and the support plate (4322) are connected via a second elastic element (4326).

5. A bearing loading rotation testing machine as claimed in claim 4, characterized in that: The clamping block (4325) is arranged in an inwardly inclined state from top to bottom or the second elastic element (4326) is arranged in an inwardly inclined state from top to bottom.

6. A bearing loading rotation testing machine as claimed in claim 1, characterized in that: The inner diameter of the extension cavity (212) is smaller than the outer diameter of the bearing, and the inner diameter of the extension cavity (212) is larger than the inner diameter of the bearing.

7. A bearing loading rotation testing machine as claimed in claim 1, characterized in that: The loading and unloading assembly (44) comprises a third elastic element (443) and a telescopic element (444); one end of the telescopic element (444) is fixedly connected to the unloading power piece (442), and the other end is fixedly connected to the loading seat (441); the third elastic element (443) is sleeved on the telescopic element (444); one end of the third elastic element (443) abuts against the loading seat (441), and the other end abuts against the unloading power piece (442).

8. A bearing loading rotation testing machine as claimed in claim 3, characterized in that: The bottom surface of the loading seat (441) is provided with a docking groove (4411), and the docking groove (4411) is used to accommodate the introduction section (43214). The bottom surface of the loading seat (441) has a docking surface (4412) matching the traction section (43213), and the outer diameter of the loading seat (441) is less than or equal to the inner diameter of the bearing.

9. A bearing loading rotation testing machine as claimed in claim 1, characterized in that: An oil passage (4413) and an installation cavity (4414) are provided in the loading seat (441), a sponge (445) is arranged in the installation cavity (4414), and the sponge (445) protrudes from the outer wall surface of the loading seat (441), the output end of the oil passage (4413) is connected to the installation cavity (4414), and a one-way valve (446) is arranged on the input end of the oil passage (4413).

10. A bearing loading rotation testing machine as claimed in claim 1, characterized in that: The test assembly (22) comprises a test drive (221), a test motor (222) and a test shaft (223); the test drive (221) is arranged on a frame (1); an output end of the test drive (221) is connected to the test motor (222); an output shaft of the test motor (222) is transmission-connected to the test shaft (223); the test shaft (223) is coaxial with a loading platform (21); and a diameter of the test shaft (223) matches an inner ring of a bearing.

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