A bearing performance testing device

Abstract

The invention provides a bearing performance testing device, which relates to the field of bearing durability testing, and comprises: a testing component, wherein the testing component is composed of a conversion mechanism and a transmission mechanism, and the testing component can convert the resistance effect generated by the bearing as the running time increases into a linear motion, so that the resistance change generated by the bearing as the running time increases can be monitored and recorded through a displacement sensor, and the relationship curve between the bearing running time and the running resistance can be accurately measured, the measurement data has high accuracy, and the parameters are comprehensive. The testing component can be used for testing bearings of different specifications and inner and outer diameters, and solves the problem that the existing bearing performance testing device, when performing a durability performance test, measures the running resistance of the bearing after driving the bearing to rotate for a certain period of time, thereby obtaining various parameters of the bearing durability performance, and this measurement method cannot measure the relationship curve between the bearing running time and the running resistance.

Description

Technical Field

[0001] The invention relates to the technical field of bearing durability testing, and in particular to a bearing performance testing device. Background Art

[0002] Bearings are an important component in modern mechanical equipment. Their main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. During use, the bearings will increase their running resistance due to factors such as wear, rust or impurities, so the bearings need to be tested for durability before they are put into production.

[0003] However, as far as the existing bearing performance testing devices are concerned, when conducting durability performance tests, the bearing is driven to rotate for a certain period of time, and then the running resistance of the bearing is measured to obtain various parameters of the bearing durability performance. This measurement method cannot measure the relationship curve between the bearing running time and the running resistance. The measurement data has high limitations, poor flexibility, and low practicality. Summary of the invention

[0004] The disclosed embodiment relates to a bearing performance testing device, which has a displacement sensor and a test component, wherein the test component can convert the resistance effect generated by the bearing as the running time increases into linear motion, so that the change in the bearing resistance generated by the running time can be monitored and recorded through the displacement sensor, and the relationship curve between the bearing running time and the running resistance can be accurately measured. The measurement data is highly accurate and the parameters are comprehensive. At the same time, the test component can be used to test bearings of different specifications and inner and outer diameters. It is flexible and convenient to use, and has strong flexibility, adaptability and practicality.

[0005] In a first aspect of the present disclosure, a bearing performance testing device is provided, specifically comprising: a mounting assembly, the mounting assembly comprising a mounting frame and a three-jaw centering chuck, the three-jaw centering chuck being fixed to the left side of the mounting frame; the mounting assembly further comprising a displacement sensor, the displacement sensor being fixedly mounted on the top of the left side of the mounting frame; a testing assembly, the testing assembly consisting of a conversion mechanism and a transmission mechanism;

[0006] The conversion mechanism includes a driving motor, a driving rod and a calibration rod. The driving motor is fixedly mounted on the right side of the mounting frame, and one end of the driving rod is rotatably connected to the inside of the mounting frame. The rotating shaft of the driving motor is transmission-connected to the driving rod. The calibration rod is inserted into the inside of the driving rod, and the displacement sensor can monitor the displacement change of the calibration rod.

[0007] The transmission mechanism includes a transmission rod, a positioning block, a locking block and an inner ring clamping block. The transmission rod is rotatably connected to the inside of the mounting frame, and the positioning block is rotatably connected to the outside of the transmission rod. The middle part of the drive rod is rotatably connected to the inside of the transmission rod, and the locking block is inserted into the outside of the transmission rod. The inner ring clamping block is inserted into one end of the transmission rod, and the center of the three-jaw centering chuck is located on the rotation axis of the transmission rod.

[0008] In at least some embodiments, the opposite sides of the transmission rod and the inner ring clamp are both of conical design.

[0009] In at least some embodiments, a mounting screw is disposed at the outer end of the transmission rod, and the inner ring clamp is screwed onto the outside of the mounting screw via threads.

[0010] In at least some embodiments, a locking top spring is provided on the side of the locking control block, and two ends of the locking top spring respectively abut against the side of the locking control block and the outside of the transmission rod.

[0011] In at least some embodiments, a synchronization block is provided inside the locking control block, and a synchronization groove is provided outside the transmission rod, and the synchronization block is inserted into the synchronization groove.

[0012] In at least some embodiments, a positioning gear is provided on the side of the positioning block, and a positioning tooth groove is provided on the side of the locking block. When the locking block is not pulled by external force, the positioning gear is inserted into the interior of the positioning tooth groove.

[0013] In at least some embodiments, a test block is provided on the outside of the driving rod, and a positioning block is provided on the outside of the positioning block. A test top spring is provided on the side of the test block, and both ends of the test top spring respectively abut against the sides of the test block and the positioning block.

[0014] In at least some embodiments, a spiral conversion groove is provided on the outside of the calibration rod, and a conversion protrusion is provided on the inside of the driving rod, and the conversion protrusion is inserted into the inside of the conversion groove.

[0015] In at least some embodiments, a track rod with a regular polygonal cross section is provided on the side of the calibration rod, and a track groove is provided inside the transmission rod, and the track rod is inserted into the track groove.

[0016] A bearing performance testing device provided by the present invention has the following beneficial effects.

[0017] The test component can convert the resistance effect generated by the bearing as the running time increases into linear motion, so that the change in the resistance generated by the bearing as the running time increases can be monitored and recorded through the displacement sensor, and the relationship curve between the bearing running time and the running resistance can be accurately measured. The measurement data is highly accurate and the parameters are comprehensive. At the same time, the test component can be used to test bearings of different specifications and inner and outer diameters. It is flexible and convenient to use, which improves the flexibility, adaptability and practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0019] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0020] In the attached picture:

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the internal structure of the present invention (bearing at the initial stage of testing).

[0023] Figure 3 The present invention Figure 2 Schematic diagram of the enlarged structure of part A in the middle.

[0024] Figure 4 It is a schematic diagram of the internal structure of the conversion mechanism of the present invention after being disassembled.

[0025] Figure 5 It is a schematic structural diagram of the transmission mechanism of the present invention after being disassembled.

[0026] Figure 6 The present invention Figure 5 Schematic diagram of the structure on the left.

[0027] Figure 7 It is a schematic diagram of the internal structure of the present invention when the running resistance of the bearing during the test process is greater than the force of the test top spring to maintain the test block and the positioning block to maintain the spacing.

[0028] Figure 8 The present invention Figure 7 Schematic diagram of the enlarged structure of part B in the middle.

[0029] Fig. 9 It is a schematic diagram of the internal structure when the lock control block of the present invention is pulled.

[0030] Fig.10 The present invention Fig. 9 Schematic diagram of the enlarged structure of part C in the middle.

[0031] Fig.11 It is a schematic diagram of the internal structure after the initial compression degree of the test top spring is adjusted in the present invention.

[0032] Fig.12 The present invention Fig.11 Schematic diagram of the enlarged structure of part D in the middle.

[0033] Reference numerals list

[0034] 1. Installation assembly; 101. Installation frame; 102. Three-jaw centering chuck; 103. Displacement sensor;

[0035] 2. conversion mechanism; 201. driving motor; 202. driving rod; 2021. test block; 2022. test top spring; 2023. conversion protrusion; 203. calibration rod; 2031. conversion slot; 2032. track rod;

[0036] 3. Transmission mechanism; 301. Transmission rod; 3011. Mounting screw; 3012. Synchronous groove; 3013. Track groove; 302. Positioning block; 3021. Positioning gear; 3022. Positioning shift block; 303. Locking control block; 3031. Locking top spring; 3032. Synchronous block; 3033. Positioning tooth groove; 304. Inner ring clamping block. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Please refer to Figures 1 to 12 As shown:

[0039] Embodiment 1: The present invention provides a bearing performance testing device, including a mounting assembly 1, the mounting assembly 1 including a mounting frame 101 and a three-jaw centering chuck 102, the three-jaw centering chuck 102 is fixed to the left side of the mounting frame 101; the mounting assembly 1 also includes a displacement sensor 103, the displacement sensor 103 is fixedly mounted on the top of the left side of the mounting frame 101; a testing assembly, the testing assembly is composed of a conversion mechanism 2 and a transmission mechanism 3;

[0040] The conversion mechanism 2 includes a driving motor 201, a driving rod 202 and a calibration rod 203. The driving motor 201 is fixedly mounted on the right side of the mounting frame 101, and one end of the driving rod 202 is rotatably connected to the inside of the mounting frame 101. The rotating shaft of the driving motor 201 is transmission-connected to the driving rod 202. The calibration rod 203 is inserted into the inside of the driving rod 202, and the displacement sensor 103 can monitor the displacement change of the calibration rod 203.

[0041] The transmission mechanism 3 includes a transmission rod 301, a positioning block 302, a locking block 303 and an inner ring clamp 304. The transmission rod 301 is rotatably connected to the inside of the mounting frame 101, and the positioning block 302 is rotatably connected to the outside of the transmission rod 301. The middle part of the drive rod 202 is rotatably connected to the inside of the transmission rod 301, and the locking block 303 is inserted into the outside of the transmission rod 301. The inner ring clamp 304 is inserted into one end of the transmission rod 301. The center of the three-jaw centering chuck 102 is located on the rotation axis of the transmission rod 301.

[0042] The displacement sensor 103 is electrically connected to an external power supply and a control device. The specific structure and working principle of the displacement sensor 103 are existing mature technologies and will not be described in detail here.

[0043] In the embodiment of the present disclosure, the sides opposite to the transmission rod 301 and the inner ring clamp 304 are both conical in design, the outer end of the transmission rod 301 is provided with a mounting screw 3011, and the inner ring clamp 304 is screwed onto the outside of the mounting screw 3011 through threads. During use, the test assembly can position and install bearings with different inner and outer diameters, which is convenient for subsequent testing. The sides opposite to the inner ring clamp 304 and the transmission rod 301 are both conical in design, so that after the inner ring of the bearing is inserted into the conical part of the transmission rod 301, the inner ring clamp 304 is screwed onto the outside of the mounting screw 3011 through threads. Rod 3011 can press and fix the inner ring of the bearing on the transmission rod 301, and the outer ring of the bearing can be fixed by the three-jaw centering chuck 102, which can be adapted to the testing of bearings with different inner and outer diameters. Under the positioning action of the two conical surfaces of the inner ring clamp 304 and the transmission rod 301, the center of the inner ring of the bearing is always on the rotation axis of the transmission rod 301, and the center of the three-jaw centering chuck 102 is also on the rotation axis of the transmission rod 301. Therefore, when the transmission rod 301 drives the inner ring of the bearing to rotate for testing, eccentric rotation will not occur, and the test is stable.

[0044] In the embodiment of the present disclosure, a synchronization block 3032 is provided inside the lock control block 303, and a synchronization groove 3012 is provided outside the transmission rod 301, and the synchronization block 3032 is inserted into the synchronization groove 3012. In use, the test component can be used to test the durability of the bearing, and the test component converts the resistance effect generated by the bearing as the running time increases into linear motion for monitoring, and can accurately record and measure the relationship parameters between the two. The test is accurate and comprehensive. A test block 2021 is provided outside the drive rod 202, and a positioning block 3022 is provided outside the positioning block 302. A test top spring 2022 is provided on the side of the test block 2021, and the two ends of the test top spring 2022 are respectively against the sides of the test block 2021 and the positioning block 3022. Under the action of the test top spring 2022, the test block 2021 and the positioning block 3022 are spread apart from each other, thereby positioning the transmission rod 301 and the drive rod 301. The relative position relationship between the movable rod 202, under the action of the locking top spring 3031, when the locking control block 303 is not pulled by external force, the positioning gear 3021 is inserted into the inside of the positioning tooth groove 3033, and under the cooperation of the synchronization block 3032 and the synchronization groove 3012, the locking control block 303, the positioning block 302 and the transmission rod 301 form a whole, that is, the locking control block 303, the positioning block 302 and the transmission rod 301 can always rotate synchronously, so that the use position of the positioning shift block 3022 is always fixed, which can provide stable support for the test top spring 2022 and ensure the stability and efficiency of the test function. During the test, the driving motor 201 drives the driving rod 202 to rotate. When the driving rod 202 rotates, the test top spring 2022 can drive the transmission rod 301 to rotate synchronously through the positioning block 302, and the transmission rod 301 can drive the inner ring of the side bearing fixed thereon to rotate when rotating to realize the test operation, which is convenient and flexible to use.

[0045] In the embodiment of the present disclosure, the outer part of the calibration rod 203 is provided with a spiral conversion groove 2031, and the inner part of the driving rod 202 is provided with a conversion protrusion 2023, and the conversion protrusion 2023 is inserted into the inner part of the conversion groove 2031. In use, during the test of the bearing durability of the test assembly, the running resistance of the bearing is relatively small at the initial stage of the test, and the resistance is not enough to cause the test top spring 2022 to deform, so that at the initial stage of the test, there will be no relative rotation between the driving rod 202 and the transmission rod 301, and they can be maintained as a whole for transmission testing. As the test time increases, the running resistance of the bearing gradually increases. When the running resistance is greater than the force of the test top spring 2022 to maintain the distance between the test block 2021 and the positioning block 3022, at this time, due to the increase in resistance, the elastic force of the test top spring 2022 is insufficient to maintain the initial distance between the test block 2021 and the positioning block 3022. Starting spacing, so there will be a relative position change between the driving rod 202 and the transmission rod 301, that is, the driving rod 202 will rotate inside the transmission rod 301 and compress the test top spring 2022 through the test shift block 2021, so as to continue to maintain the transmission relationship between the driving rod 202 and the transmission rod 301, when the driving rod 202 rotates relatively inside the transmission rod 301, the conversion protrusion 2023 will drive the calibration rod 203 to move outward through the conversion groove 2031, the displacement sensor 103 can monitor the position change of the calibration rod 203 and send it to the control device, so as to realize the test of the bearing durability performance, and with the increase of the test time, the running resistance of the bearing continues to increase, the test top spring 2022 will continue to be compressed, and the moving distance of the calibration rod 203 will also increase, so that the relationship between the bearing running resistance and time can be stably measured, and the test result is accurate and comprehensive.

[0046] The locking member 303 is provided with a locking top spring 3031 on the side of the locking block 303, and the two ends of the locking top spring 3031 are respectively against the side of the locking block 303 and the outside of the transmission rod 301, the side of the positioning block 302 is provided with a positioning gear 3021, and the side of the locking block 303 is provided with a positioning tooth groove 3033. When the locking block 303 is not pulled by an external force, the positioning gear 3021 is inserted into the inside of the positioning tooth groove 3033. In use, the test assembly can test bearings of different specifications, and the running resistance of different bearings during use is also different. Therefore, by adjusting the initial compression length of the test top spring 2022, it can adapt to the durability test of different bearings. Pulling the locking block 30 3 makes the positioning tooth groove 3033 escape from the outside of the positioning gear 3021, and then the positioning block 302 can rotate independently of the transmission rod 301 outside the transmission rod 301. After the positioning block 302 rotates, the use position of the positioning block 3022 is changed, thereby changing the initial spacing between the positioning block 3022 and the test block 2021, that is, changing the initial compression degree of the test top spring 2022. After the adjustment is completed, after the locking block 303 is released, the locking block 303 can automatically reset under the action of the locking top spring 3031, and the positioning tooth groove 3033 is re-inserted to the outside of the positioning gear 3021 to lock the use state of the positioning block 302, so as to facilitate subsequent test operations, and the adaptability is extremely strong.

[0047] In the disclosed embodiment, a track rod 2032 having a regular polygonal cross section is provided on the side of the calibration rod 203, and a track groove 3013 is provided inside the transmission rod 301, and the track rod 2032 is inserted into the track groove 3013. This design enables the calibration rod 203 to always rotate synchronously with the transmission rod 301, so that when relative rotation occurs between the transmission rod 301 and the driving rod 202, the calibration rod 203 can stably change its displacement so as to be monitored by the displacement sensor 103, thereby realizing the recording and analysis operations of the test data.

[0048] Specific usage and function of this embodiment: In the present invention, the test assembly can position and install bearings with different inner and outer diameters, which is convenient for subsequent testing. The inner ring clamp 304 and the opposite sides of the transmission rod 301 are both conical in design, so that after the inner ring of the bearing is inserted into the conical part of the transmission rod 301, the inner ring clamp 304 is pressed and fixed on the transmission rod 301 by the installation screw 3011. The outer ring of the bearing can be fixed by the three-jaw centering chuck 102, which can be adapted to the testing of bearings with different inner and outer diameters. Under the positioning action of the two conical surfaces of the inner ring clamp 304 and the transmission rod 301, the center of the inner ring of the bearing is always on the rotation axis of the transmission rod 301, and the center of the three-jaw centering chuck 102 is It is also on the rotation axis of the transmission rod 301, so that when the transmission rod 301 drives the inner ring of the bearing to rotate during the test, there will be no eccentric rotation. The test component can be used to test the durability of the bearing, and the test component converts the resistance effect generated by the bearing as the running time increases into linear motion for monitoring, and can accurately record and measure the relationship parameters between the two. The test is accurate and comprehensive. Under the action of the test top spring 2022, the test block 2021 and the positioning block 3022 are spread apart from each other, thereby locating the relative position relationship between the transmission rod 301 and the drive rod 202. Under the action of the locking top spring 3031, when the locking control block 303 is not pulled by external force, the positioning gear 3021 is inserted into the positioning tooth groove 30 33, and under the cooperation of the synchronization block 3032 and the synchronization groove 3012, the locking block 303, the positioning block 302 and the transmission rod 301 form a whole, that is, the locking block 303, the positioning block 302 and the transmission rod 301 can always rotate synchronously, so that the use position of the positioning block 3022 is always fixed, which can provide stable support for the test top spring 2022 and ensure the stability and efficiency of the test function. During the test, the driving motor 201 drives the driving rod 202 to rotate. When the driving rod 202 rotates, the test top spring 2022 can drive the transmission rod 301 to rotate synchronously through the positioning block 302. When the transmission rod 301 rotates, it can drive the inner ring of the bearing fixed on its side to rotate to realize the test operation. During the bearing durability test, the running resistance of the bearing is relatively small at the beginning of the test, and the resistance is not enough to deform the test top spring 2022, so that there is no relative rotation between the drive rod 202 and the transmission rod 301 at the beginning of the test, and they can be kept as a whole for transmission testing. As the test time increases, the running resistance of the bearing gradually increases. When the running resistance is greater than the force of the test top spring 2022 to maintain the distance between the test block 2021 and the positioning block 3022, due to the increase in resistance, the elastic force of the test top spring 2022 is not enough to maintain the initial distance between the test block 2021 and the positioning block 3022, so that the relative position between the drive rod 202 and the transmission rod 301 will change thereafter.That is, the driving rod 202 will rotate inside the transmission rod 301 and compress the test top spring 2022 through the test shift block 2021, so as to continue to maintain the transmission relationship between the driving rod 202 and the transmission rod 301. When the driving rod 202 rotates relatively inside the transmission rod 301, the conversion protrusion 2023 will drive the calibration rod 203 to move outward through the conversion groove 2031. The displacement sensor 103 can monitor the position change of the calibration rod 203 and send it to the control device, thereby realizing the test of the bearing durability performance. As the test time increases, the running resistance of the bearing continues to increase, and the test top spring 2022 will continue to be compressed, so that the moving distance of the calibration rod 203 will also increase, so that the relationship between the bearing running resistance and time can be stably measured. The test results are accurate and comprehensive. The test component can be used to test bearings of different specifications. The running resistance of the bearings is also different when in use, so the durability test of different bearings can be adapted by adjusting the initial compression length of the test top spring 2022. The locking block 303 is pulled to make the positioning tooth groove 3033 disengage from the outside of the positioning gear 3021. After that, the positioning block 302 can rotate independently of the transmission rod 301 outside the transmission rod 301. After the positioning block 302 rotates, the use position of the positioning block 3022 is changed, thereby changing the initial spacing between the positioning block 3022 and the test block 2021, that is, changing the initial compression degree of the test top spring 2022. After the adjustment is completed, after the locking block 303 is released, the locking block 303 can automatically reset under the action of the locking top spring 3031, and the positioning tooth groove 3033 is re-inserted to the outside of the positioning gear 3021 to lock the use state of the positioning block 302 for subsequent test operations.

[0049] In another embodiment, a track ring is provided inside the transmission rod 301, and the positioning block 3022 and the test block 2021 are inserted into the outside of the track ring, and the test top spring 2022 is sleeved on the outside of the track ring. This design improves the stability of the test assembly in use.

[0050] In this article, there are a few points to note:

[0051] 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0052] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0053] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A bearing performance testing device, comprising: A mounting assembly (1), the mounting assembly (1) comprising a mounting frame (101) and a three-jaw centering chuck (102), the three-jaw centering chuck (102) being fixed to the left side of the mounting frame (101); characterized in that the mounting assembly (1) further comprises a displacement sensor (103), the displacement sensor (103) being fixedly mounted on the top of the left side of the mounting frame (101); a testing assembly, the testing assembly comprising a conversion mechanism (2) and a transmission mechanism (3); The conversion mechanism (2) comprises a driving motor (201), a driving rod (202) and a calibration rod (203); the driving motor (201) is fixedly mounted on the right side of the mounting frame (101), and one end of the driving rod (202) is rotatably connected to the inside of the mounting frame (101); the rotating shaft of the driving motor (201) and the driving rod (202) are transmission-connected; the calibration rod (203) is plugged into the inside of the driving rod (202), and the displacement sensor (103) is capable of monitoring the displacement change of the calibration rod (203); The transmission mechanism (3) comprises a transmission rod (301), a positioning block (302), a locking block (303) and an inner ring clamping block (304); the transmission rod (301) is rotatably connected to the inside of the mounting frame (101), and the positioning block (302) is rotatably connected to the outside of the transmission rod (301); the middle part of the drive rod (202) is rotatably connected to the inside of the transmission rod (301), and the locking block (303) is plugged into the outside of the transmission rod (301); the inner ring clamping block (304) is plugged into one end of the transmission rod (301); and the center of the three-jaw centering chuck (102) is located on the rotation axis of the transmission rod (301); A test block (2021) is provided on the outside of the driving rod (202), and a positioning block (3022) is provided on the outside of the positioning block (302); a test top spring (2022) is provided on the side of the test block (2021), and two ends of the test top spring (2022) respectively abut against the side of the test block (2021) and the positioning block (3022); The outside of the calibration rod (203) is provided with a conversion groove (2031) with a spiral direction, and the inside of the driving rod (202) is provided with a conversion protrusion (2023), and the conversion protrusion (2023) is inserted into the inside of the conversion groove (2031).

2. A bearing performance testing device as claimed in claim 1, characterized in that: The opposite sides of the transmission rod (301) and the inner ring clamping block (304) are both of conical design.

3. A bearing performance testing device as claimed in claim 2, characterized in that: The outer end of the transmission rod (301) is provided with a mounting screw rod (3011), and the inner ring clamping block (304) is screwed onto the outside of the mounting screw rod (3011) via threads.

4. A bearing performance testing device as claimed in claim 3, characterized in that: A locking top spring (3031) is provided on the side of the locking control block (303), and two ends of the locking top spring (3031) respectively abut against the side of the locking control block (303) and the outside of the transmission rod (301).

5. A bearing performance testing device as claimed in claim 4, characterized in that: A synchronization block (3032) is provided inside the locking control block (303), and a synchronization groove (3012) is provided outside the transmission rod (301), and the synchronization block (3032) is inserted into the synchronization groove (3012).

6. A bearing performance testing device as claimed in claim 5, characterized in that: A positioning gear (3021) is provided on the side of the positioning block (302), and a positioning tooth groove (3033) is provided on the side of the locking block (303); when the locking block (303) is not pulled by an external force, the positioning gear (3021) is inserted into the interior of the positioning tooth groove (3033).

7. A bearing performance testing device as claimed in claim 6, characterized in that: A track rod (2032) having a regular polygonal cross section is provided on the side of the calibration rod (203), and a track groove (3013) is provided inside the transmission rod (301), and the track rod (2032) is inserted into the track groove (3013).

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