A permanent magnet synchronous motor test device

Abstract

The present invention discloses a permanent magnet synchronous motor testing device, the testing device comprises a bidirectional conveying member, a lifting platform is provided at one end of the bidirectional conveying member, a clamping arm is provided on the lifting platform, a workbench is provided at one end of the bidirectional conveying member, a limiting fixing member is provided on the workbench, an array of adjusting feet are provided below the workbench, a testing member is provided on the workbench, and the clamping arm transfers the motor on the feeding side of the bidirectional conveying member to the workbench. The testing device of the present invention drives the second limiting member to push the motor to be tested by the first cylinder, and at the same time, the second cylinder drives the connecting sleeve to drive the connecting member to move, so that the output shaft of the motor to be tested is inserted into the assembly hole, the motor to be tested and the starting compensation motor work at the same time, and the motor to be tested and the starting compensation motor drive the connecting shaft to rotate in the same direction to realize the measurement of the motor speed; replacing the traditional manual measurement, it is beneficial to improve the efficiency of detection, reduce the labor intensity of the staff, and promote the automation process of motor testing.

Description

Technical Field

[0001] The invention relates to a testing device, in particular to a permanent magnet synchronous motor testing device. Background Art

[0002] During the development of new motor products or the later maintenance and repair of motors, a large number of experimental verifications are required on prototypes or machines to be repaired. With the rapid development of the motor industry, the variety of motors has increased, the output has increased, and the testing workload has also continued to increase. In the experimental research of large motors, the monitoring of working conditions, and the automatic control system, a large amount of data needs to be collected and processed, which has put forward new requirements for motor testing technology.

[0003] The motor speed requirements are different in various equipment. During the motor production process, the transfer of components will lead to problems such as unqualified speed and motor heating, affecting the quality of the product. After the motor transfer is completed, the motor speed needs to be tested. In the existing technology, manual detection is usually used, which is inefficient and long-term work increases the labor intensity of the staff. Summary of the invention

[0004] The purpose of the present invention is to provide a permanent magnet synchronous motor testing device. When in use, the motor to be tested is placed on the input side of a bidirectional conveyor, the motor is transferred to a workbench by a lifting platform and a clamping arm, the bidirectional screw rod is driven to rotate by a second motor, so that the first limit piece clamps the motor, and the motor is relaxed after clamping so that the motor is in a middle position, the positioning pin is placed on the output shaft of the motor to be tested, the second limit piece is driven by a first cylinder to push the motor to be tested, and the second cylinder drives the connecting sleeve to drive the connecting piece to move, so that the output shaft of the motor to be tested is inserted into the assembly hole, the first limit piece clamps the motor, the motor to be tested and the starting compensation motor work at the same time, the motor to be tested and the starting compensation motor drive the connecting shaft to rotate in the same direction, after the rotation is stable, the number of times the proximity switch senses the sensing column in one minute divided by the number of sensing columns is the motor speed, the motor speed is measured, and the traditional manual measurement is replaced, which is beneficial to improving the efficiency of detection, reducing the labor intensity of staff, and promoting the automation process of motor testing.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A permanent magnet synchronous motor testing device comprises a bidirectional conveying member, a lifting platform is provided at one end of the bidirectional conveying member, a clamping arm is provided on the lifting platform, a workbench is provided at one end of the bidirectional conveying member, a limit fixing member is provided on the workbench, an array of adjustment feet are provided below the workbench, a test piece is provided on the workbench, the clamping arm transfers the motor on the feeding side of the bidirectional conveying member to the workbench, and after being fixed by the limit fixing member, the test piece detects the motor.

[0007] Furthermore, a first support frame is provided on the feeding side of the bidirectional conveyor, and a distance sensor is provided on the first support frame. When the distance sensor senses an object, the feeding side of the bidirectional conveyor stops, and when no object is sensed, the feeding side of the bidirectional conveyor runs.

[0008] Furthermore, the lifting platform includes a bottom support plate, a telescopic cylinder is provided on the bottom support plate, a rotating column is provided on the telescopic cylinder, and a motor placement groove is provided on the rotating column.

[0009] Furthermore, the clamp arm includes a clamp arm bracket, a first motor is provided on the clamp arm bracket, a first gear is provided on the first motor, the first motor is located in a motor placement slot, the clamp arm bracket includes a first support plate, a second support plate is provided on the first support plate, a symmetrically distributed third support plate is provided below the second support plate, a fourth support plate is vertically provided on the third support plate, a first fixed shaft is provided on the first support plate, a second gear meshing with the first gear is provided on the first fixed shaft, a third rotating connecting hole is provided on the first support plate, and the clamp arm bracket is rotatably connected to the rotating column through the third rotating connecting hole.

[0010] The fourth supporting plate is provided with a clamping part, which includes a double-axis cylinder, a clamping block is fastened to the output shaft of the double-axis cylinder, and a clamping groove is provided on the clamping block. The measuring motor is clamped by the extension and retraction of the double-axis cylinder, the lifting and lowering of the clamping arm is controlled by the lifting platform, and the rotation of the clamping arm bracket is driven by the first motor.

[0011] Furthermore, the workbench includes a first support platform, a second support platform is provided at one end of the first support platform, a slide groove is provided on the second support platform, an array-distributed slide groove is provided on the second support platform, a symmetrically distributed first connecting block is provided below the second support platform, and a first rotating connecting hole is provided on the first connecting block.

[0012] A second connecting block is provided below the second supporting platform, and a second rotating connecting hole is provided on the second connecting block.

[0013] Support feet distributed in an array are provided below the first support platform, and the adjustable feet are located below the support feet.

[0014] The first support platform is provided with a third connecting block and a seventh connecting block, the third connecting block is provided with a first through hole, the seventh connecting block is provided with a second through hole, the first support platform is provided with symmetrically distributed mounting blocks, the first support platform is provided with a fourth connecting block, and the fourth connecting block is provided with a mounting hole.

[0015] Furthermore, the limiting fixing member includes a second motor, a bidirectional screw rod is provided on the output shaft of the second motor, the bidirectional screw rod is located in the first rotating connection hole and rotates, and a symmetrically distributed first limiting member is provided on the bidirectional screw rod.

[0016] The first limiting member includes a sliding connecting block, the sliding connecting block is provided with a threaded hole that cooperates with the bidirectional screw rod, the sliding connecting block is provided with a first connecting rod, the first connecting rod is provided with symmetrically distributed sliding connecting rods, and extrusion blocks are provided between the sliding connecting rods. The first limiting member slides in the sliding groove through the sliding connecting rod.

[0017] Furthermore, the second connecting block is provided with a first cylinder, the output shaft of the first cylinder passes through the second rotating connecting hole and is fastened with a second limiting member, the second limiting member includes a sliding block located in a sliding groove, a fifth connecting block is provided below the sliding block, a fourth rotating connecting hole is provided on the fifth connecting block, a sliding plate is provided above the sliding block, a pushing plate is provided on the sliding plate, and the output shaft of the first cylinder cooperates with the fourth rotating connecting hole.

[0018] Furthermore, the test piece includes a compensation motor, the output shaft of the compensation motor passes through the first through hole and is fastened to a connecting shaft, a connecting piece is provided at one end of the connecting shaft, a connecting sleeve is rotatably provided on the connecting piece, a second cylinder is provided on the mounting block, and the output shaft of the second cylinder is fastened to the connecting sleeve.

[0019] The connecting shaft includes a connecting shaft body, one end of which is tightly connected to the compensation motor, and the other end is provided with a supporting shaft, one end of the supporting shaft is tightly connected to the connecting shaft body, and the other end is provided with a sliding sleeve, the supporting shaft is provided with symmetrically distributed rotating disks, induction columns are provided between the rotating disks, one end of the sliding sleeve is provided with a sliding connection hole, and a limit strip is provided in the sliding connection hole.

[0020] Furthermore, the connecting member includes a sliding shaft, one end of the sliding shaft is provided with a sliding column that cooperates with the sliding connecting hole, the other end is provided with an assembly hole, the sliding column is provided with a limit groove that cooperates with the limit strip, the assembly hole is provided with a positioning pin placement groove, and the sliding shaft is provided with a rotating connecting groove.

[0021] The connecting sleeve comprises a connecting sleeve body, a fifth rotating connecting hole is arranged on the connecting sleeve body, a symmetrically distributed sixth connecting block is arranged on the connecting sleeve body, a connecting column is arranged on the sixth connecting block, and the output shaft of the second cylinder is fastened to the connecting column.

[0022] The connecting sleeve cooperates with the rotating connecting groove through the connecting sleeve body, and the sliding shaft is located in the second through hole and rotates.

[0023] A proximity switch is arranged in the mounting hole, and the proximity switch faces the supporting shaft. When the sensing column contacts the proximity switch, the proximity switch senses a signal once. The number of times the proximity switch senses the sensing column in one minute divided by the number of sensing columns is the rotation speed of the motor.

[0024] Furthermore, when the compensation motor is started and there is no motor to be tested involved, the connecting shaft is in a critical state of rotation.

[0025] Beneficial effects of the present invention:

[0026] 1. The test device of the present invention places the motor to be tested on the input side of the bidirectional conveyor, transfers the motor to the workbench through the lifting platform and the clamping arm, drives the bidirectional screw to rotate through the second motor, so that the first limiter clamps the motor, and relaxes after clamping so that the motor is in the middle position, and the positioning pin is placed on the output shaft of the motor to be tested, and drives the second limiter to push the motor to be tested through the first cylinder, and at the same time drives the connecting sleeve of the second cylinder to drive the connecting member to move, so that the output shaft of the motor to be tested is inserted into the assembly hole, and the first limiter clamps the motor, and the motor to be tested and the starting compensation motor work at the same time, and the motor to be tested and the starting compensation motor drive the connecting shaft to rotate in the same direction. After the rotation is stable, the number of times the proximity switch senses the sensing column in one minute divided by the number of sensing columns is the motor speed, so as to achieve the measurement of the motor speed;

[0027] 2. The test device of the present invention replaces the traditional manual measurement, which is beneficial to improving the efficiency of detection, reducing the labor intensity of the staff, and promoting the automation process of motor testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described below in conjunction with the accompanying drawings.

[0029] Figure 1 It is a schematic diagram of the structure of the testing device of the present invention;

[0030] Figure 2 It is a schematic diagram of the structure of the testing device of the present invention;

[0031] Figure 3 The present invention Figure 1 The enlarged structural diagram at A in the middle;

[0032] Figure 4 It is a partial structural schematic diagram of the testing device of the present invention;

[0033] Figure 5 It is a schematic diagram of the structure of the clamp arm support of the present invention;

[0034] Figure 6 It is a schematic diagram of the structure of the engaging member of the present invention;

[0035] Figure 7 It is a schematic diagram of the workbench structure of the present invention;

[0036] Figure 8 It is a schematic diagram of the workbench structure of the present invention;

[0037] Fig. 9 It is a schematic diagram of the structure of the first position-limiting member of the present invention;

[0038] Fig.10is a schematic diagram of the structure of the second position-limiting member of the present invention;

[0039] Fig.11 It is a partial structural schematic diagram of the test piece of the present invention;

[0040] Fig.12 It is a schematic diagram of the connecting shaft structure of the present invention;

[0041] Fig.13 It is a schematic diagram of the structure of the connecting piece of the present invention;

[0042] Fig.14 It is a schematic diagram of the connecting sleeve structure of the present invention. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments 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.

[0044] A permanent magnet synchronous motor testing device, the testing device comprises a bidirectional conveying member 1, such as Figure 1 , Figure 2 As shown, a lifting platform 2 is provided at one end of the bidirectional conveying member 1, a clamping arm 3 is provided on the lifting platform 2, a workbench 4 is provided at one end of the bidirectional conveying member 1, a limiting fixing member 5 is provided on the workbench 4, an array of adjustable feet 7 are provided below the workbench 4, a test piece 6 is provided on the workbench 4, the clamping arm 3 transfers the motor on the feeding side of the bidirectional conveying member 1 to the workbench 4, and after being fixed by the limiting fixing member 5, the test piece 6 detects the motor.

[0045] A first support frame 11 is provided on the feeding side of the bidirectional conveyor 1. Figure 3 As shown, a distance sensor 12 is provided on the first support frame 11. When the distance sensor 12 senses an object, the feeding side of the bidirectional conveyor 1 stops, and when no object is sensed, the feeding side of the bidirectional conveyor 1 runs.

[0046] The lifting platform 2 includes a bottom support plate 21, such as Figure 4 As shown, a telescopic cylinder body 22 is provided on the bottom support plate 21 , a rotating column 221 is provided on the telescopic cylinder body 22 , and a motor placement slot 222 is provided on the rotating column 221 .

[0047] The clamp arm 3 includes a clamp arm bracket 31, such as Figure 4 As shown, the clamp arm bracket 31 is provided with a first motor 32, the first motor 32 is provided with a first gear 33, the first motor 32 is located in the motor placement slot 222, and the clamp arm bracket 31 includes a first support plate 311, as shown in FIG. Figure 5As shown, a second support plate 315 is provided on the first support plate 311, a symmetrically distributed third support plate 316 is provided below the second support plate 315, a fourth support plate 317 is vertically provided on the third support plate 316, a first fixed shaft 312 is provided on the first support plate 311, a second gear 313 meshing with the first gear is provided on the first fixed shaft 312, a third rotating connecting hole 314 is provided on the first support plate 311, and the clamp arm bracket 31 is rotatably connected to the rotating column 221 through the third rotating connecting hole 314.

[0048] The fourth support plate 317 is provided with a clamping member 34, which includes a double-axis cylinder 341. Figure 6 As shown, a clamp block 342 is fastened to the output shaft of the double-axis cylinder 341, and a locking groove 343 is provided on the clamp block 342. The measuring motor is engaged by the extension and retraction of the double-axis cylinder 341, the lifting and lowering of the clamp arm 3 is controlled by the lifting platform 2, and the rotation of the clamp arm bracket 31 is driven by the first motor 32.

[0049] The workbench 4 includes a first support platform 41, such as Figure 7 , Figure 8 As shown, a second support platform 42 is provided at one end of the first support platform 41, a slide groove 43 is provided on the second support platform 42, an array-distributed slide groove 44 is provided on the second support platform 42, a symmetrically distributed first connecting block 45 is provided below the second support platform 42, and a first rotating connecting hole 46 is provided on the first connecting block 45.

[0050] A second connection block 421 is disposed below the second support platform 42 , and a second rotation connection hole 422 is disposed on the second connection block 421 .

[0051] Support feet 47 distributed in an array are provided below the first support platform 41 , and the adjusting feet 7 are located below the support feet 47 .

[0052] A third connecting block 410 and a seventh connecting block 415 are provided on the first supporting platform 41. The third connecting block 410 is provided with a first through hole 411. The seventh connecting block 415 is provided with a second through hole 416. Symmetrically distributed mounting blocks 414 are provided on the first supporting platform 41. A fourth connecting block 412 is provided on the first supporting platform 41. A mounting hole 413 is provided on the fourth connecting block 412.

[0053] The limiting fixing member 5 comprises a second motor 51 . A bidirectional screw rod 52 is disposed on the output shaft of the second motor 51 . The bidirectional screw rod 52 is located and rotated in the first rotating connection hole 46 . A symmetrically distributed first limiting member 53 is disposed on the bidirectional screw rod 52 .

[0054] The first stopper 53 includes a sliding connection block 531. Fig. 9As shown, the sliding connection block 531 is provided with a threaded hole 532 that cooperates with the bidirectional screw rod 52, the sliding connection block 531 is provided with a first connecting rod 533, the first connecting rod 533 is provided with symmetrically distributed sliding connection rods 534, and an extrusion block 535 is provided between the sliding connection rods 534. The first limit member 53 slides in the sliding groove 44 through the sliding connection rod 534.

[0055] The second connecting block 421 is provided with a first cylinder 54, and the output shaft of the first cylinder 54 passes through the second rotating connecting hole 422 and is fastened to a second stopper 55. Fig.10 As shown, the second limiting member 55 includes a slider 551 located in the slide groove 43, a fifth connecting block 552 is provided below the slider 551, a fourth rotating connecting hole 553 is provided on the fifth connecting block 552, a sliding plate 554 is provided above the slider 551, a pushing plate 555 is provided on the sliding plate 554, and the output shaft of the first cylinder 54 cooperates with the fourth rotating connecting hole 553.

[0056] The test piece 6 includes a compensation motor 61, and the output shaft of the compensation motor 61 passes through the first through hole 411 and is fastened to a connecting shaft 62. Fig.11 As shown, a connecting piece 63 is provided at one end of the connecting shaft 62 , a connecting sleeve 64 is rotatably provided on the connecting piece 63 , a second cylinder 65 is provided on the mounting block 414 , and an output shaft of the second cylinder 65 is tightly connected to the connecting sleeve 64 .

[0057] The connecting shaft 62 includes a connecting shaft body 621, one end of which is fixedly connected to the compensation motor 61. Fig.12 As shown, a support shaft 622 is provided at the other end, one end of the support shaft 622 is tightly connected to the connecting shaft body 621, and the other end is provided with a sliding sleeve 623. The support shaft 622 is provided with symmetrically distributed rotating disks 624, and sensing columns 625 are provided between the rotating disks 624. A sliding connection hole 626 is provided at one end of the sliding sleeve 623, and a limiting strip 627 is provided in the sliding connection hole 626.

[0058] The connecting member 63 includes a sliding shaft 631, such as Fig.13 As shown, one end of the sliding shaft 631 is provided with a sliding column 632 that cooperates with the sliding connection hole 626, and the other end is provided with an assembly hole 633. The sliding column 632 is provided with a limiting groove 634 that cooperates with the limiting strip 627. A positioning pin placement groove 635 is provided in the assembly hole 633, and a rotating connection groove 636 is provided on the sliding shaft 631.

[0059] The connecting sleeve 64 includes a connecting sleeve body 641, such as Fig.14As shown, a fifth rotating connection hole 642 is provided on the connecting sleeve body 641 , a symmetrically distributed sixth connection block 643 is provided on the connecting sleeve body 641 , a connecting column 644 is provided on the sixth connection block 643 , and the output shaft of the second cylinder 65 is fastened to the connecting column 644 .

[0060] The connecting sleeve 64 cooperates with the rotating connecting groove 636 through the connecting sleeve body 641 , and the sliding shaft 631 is located in the second through hole 416 and rotates.

[0061] A proximity switch 66 is provided in the mounting hole 413 , and the proximity switch 66 faces the support shaft 622 . When the sensing column 625 contacts the proximity switch 66 , the proximity switch 66 senses a signal once. The number of times the proximity switch 66 senses the sensing column 625 in one minute divided by the number of sensing columns 625 is the motor speed.

[0062] When the motor testing device does not detect the motor, the compensation motor 61 is started, and at this time, the connecting shaft 62 is in a critical state of rotation.

[0063] When in use, the motor to be tested is placed on the input side of the bidirectional conveyor 1, and the motor is transferred to the workbench 4 through the lifting platform 2 and the clamping arm 3. The bidirectional screw rod 52 is driven to rotate by the second motor 51, so that the first limiter 53 clamps the motor, and the motor is relaxed after clamping so that the motor is in the middle position. The positioning pin is placed on the output shaft of the motor to be tested, and the second limiter 55 is driven by the first cylinder 54 to push the motor to be tested. At the same time, the second cylinder 65 drives the connecting sleeve 64 to drive the connecting member 63 to move, so that the output shaft of the motor to be tested is inserted into the assembly hole 633. The first limiter 53 clamps the motor, and the motor to be tested and the starting compensation motor 61 work at the same time. The motor to be tested and the starting compensation motor 61 drive the connecting shaft 62 to rotate in the same direction. After the rotation is stable, the number of times the proximity switch 66 senses the sensing column 625 in one minute divided by the number of sensing columns 625 is the motor speed, so as to realize the measurement of the motor speed, replace the traditional manual measurement, which is conducive to improving the efficiency of detection, reducing the labor intensity of the staff, and promoting the automation process of motor testing.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0065] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining 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, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A permanent magnet synchronous motor testing device, the testing device comprising a bidirectional conveying member (1), characterized in that: A lifting platform (2) is provided at one end of the bidirectional conveying member (1), a clamping arm (3) is provided on the lifting platform (2), a workbench (4) is provided at one end of the bidirectional conveying member (1), a limit fixing member (5) is provided on the workbench (4), an array of adjustable feet (7) are provided below the workbench (4), a test piece (6) is provided on the workbench (4), the clamping arm (3) transfers the motor on the feeding side of the bidirectional conveying member (1) to the workbench (4), and after being fixed by the limit fixing member (5), the test piece (6) detects the motor; The bidirectional conveying member (1) is provided with a first support frame (11) on the feeding side thereof, and a distance sensor (12) is provided on the first support frame (11); when the distance sensor (12) senses an object, the feeding side of the bidirectional conveying member (1) stops, and when the distance sensor (12) senses no object, the feeding side of the bidirectional conveying member (1) runs; The workbench (4) comprises a first support platform (41), a second support platform (42) is provided at one end of the first support platform (41), a slide groove (43) is provided on the second support platform (42), an array-distributed slide groove (44) is provided on the second support platform (42), a symmetrically distributed first connection block (45) is provided below the second support platform (42), and a first rotating connection hole (46) is provided on the first connection block (45); A second connecting block (421) is provided below the second supporting platform (42), and a second rotating connecting hole (422) is provided on the second connecting block (421); An array of supporting feet (47) is provided below the first supporting platform (41), and the adjusting foot (7) is located below the supporting feet (47); The first support platform (41) is provided with a third connection block (410) and a seventh connection block (415); the third connection block (410) is provided with a first through hole (411); the seventh connection block (415) is provided with a second through hole (416); the first support platform (41) is provided with symmetrically distributed mounting blocks (414); the first support platform (41) is provided with a fourth connection block (412); and the fourth connection block (412) is provided with a mounting hole (413); The test piece (6) comprises a compensation motor (61), the output shaft of the compensation motor (61) passes through the first through hole (411) and is tightly connected to a connecting shaft (62), one end of the connecting shaft (62) is provided with a connecting piece (63), a connecting sleeve (64) is rotatably provided on the connecting piece (63), a second cylinder (65) is provided on the mounting block (414), and the output shaft of the second cylinder (65) is tightly connected to the connecting sleeve (64); The connecting shaft (62) comprises a connecting shaft body (621), one end of the connecting shaft body (621) is tightly connected to the compensation motor (61), and the other end is provided with a supporting shaft (622), one end of the supporting shaft (622) is tightly connected to the connecting shaft body (621), and the other end is provided with a sliding sleeve (623), the supporting shaft (622) is provided with symmetrically distributed rotating disks (624), and sensing columns (625) are provided between the rotating disks (624), and one end of the sliding sleeve (623) is provided with a sliding connection hole (626), and a limiting strip (627) is provided in the sliding connection hole (626).

2. A permanent magnet synchronous motor testing device according to claim 1, characterized in that: The lifting platform (2) comprises a bottom support plate (21), a telescopic cylinder body (22) is provided on the bottom support plate (21), a rotating column (221) is provided on the telescopic cylinder body (22), and a motor placement groove (222) is provided on the rotating column (221).

3. A permanent magnet synchronous motor testing device according to claim 2, characterized in that: The clamp arm (3) comprises a clamp arm bracket (31), a first motor (32) is provided on the clamp arm bracket (31), a first gear (33) is provided on the first motor (32), the first motor (32) is located in the motor placement slot (222), the clamp arm bracket (31) comprises a first support plate (311), a second support plate (315) is provided on the first support plate (311), a symmetrically distributed third support plate (316) is provided below the second support plate (315), a fourth support plate (317) is vertically provided on the third support plate (316), a first fixed shaft (312) is provided on the first support plate (311), a second gear (313) meshing with the first gear is provided on the first fixed shaft (312), a third rotation connection hole (314) is provided on the first support plate (311), and the clamp arm bracket (31) is rotationally connected to the rotation column (221) through the third rotation connection hole (314); The fourth support plate (317) is provided with a clamping member (34), which includes a double-axis cylinder (341), a clamping block (342) is fastened to the output shaft of the double-axis cylinder (341), and a clamping groove (343) is provided on the clamping block (342). The measuring motor is clamped by the extension and retraction of the double-axis cylinder (341), the lifting and lowering of the clamping arm (3) is controlled by the lifting platform (2), and the rotation of the clamping arm bracket (31) is driven by the first motor (32).

4. A permanent magnet synchronous motor testing device according to claim 1, characterized in that: The position-limiting fixing member (5) comprises a second motor (51), a bidirectional screw rod (52) is arranged on the output shaft of the second motor (51), the bidirectional screw rod (52) is arranged to rotate in the first rotating connection hole (46), and a symmetrically distributed first position-limiting member (53) is arranged on the bidirectional screw rod (52); The first limiting member (53) includes a sliding connection block (531), the sliding connection block (531) is provided with a threaded hole (532) that cooperates with the bidirectional screw rod (52), the sliding connection block (531) is provided with a first connecting rod (533), the first connecting rod (533) is provided with symmetrically distributed sliding connection rods (534), and an extrusion block (535) is provided between the sliding connection rods (534). The first limiting member (53) slides in the sliding groove (44) through the sliding connection rod (534).

5. A permanent magnet synchronous motor testing device according to claim 4, characterized in that: The second connecting block (421) is provided with a first cylinder (54), the output shaft of the first cylinder (54) passes through the second rotating connecting hole (422) and is fastened to a second limiting member (55), the second limiting member (55) comprises a sliding block (551) located in the sliding groove (43), a fifth connecting block (552) is provided below the sliding block (551), a fourth rotating connecting hole (553) is provided on the fifth connecting block (552), a sliding plate (554) is provided above the sliding block (551), a pushing plate (555) is provided on the sliding plate (554), and the output shaft of the first cylinder (54) cooperates with the fourth rotating connecting hole (553).

6. A permanent magnet synchronous motor testing device according to claim 1, characterized in that: The connecting member (63) comprises a sliding shaft (631), one end of the sliding shaft (631) is provided with a sliding column (632) matched with the sliding connection hole (626), the other end is provided with an assembly hole (633), the sliding column (632) is provided with a limiting groove (634) matched with the limiting strip (627), the assembly hole (633) is provided with a positioning pin placement groove (635), and the sliding shaft (631) is provided with a rotating connection groove (636); The connecting sleeve (64) comprises a connecting sleeve body (641), a fifth rotating connecting hole (642) is provided on the connecting sleeve body (641), a symmetrically distributed sixth connecting block (643) is provided on the connecting sleeve body (641), a connecting column (644) is provided on the sixth connecting block (643), and the output shaft of the second cylinder (65) is fixedly connected to the connecting column (644); The connecting sleeve (64) cooperates with the rotating connecting groove (636) through the connecting sleeve body (641), and the sliding shaft (631) is located in the second through hole (416) and rotates; A proximity switch (66) is disposed in the mounting hole (413). The proximity switch (66) is directly opposite to the support shaft (622). When the sensing column (625) contacts the proximity switch (66), the proximity switch (66) senses a signal once. The number of times the proximity switch (66) senses the sensing column (625) in one minute divided by the number of sensing columns (625) is the rotation speed of the motor.

7. A permanent magnet synchronous motor testing device according to claim 1, characterized in that: When the compensation motor (61) is started and there is no motor to be tested involved, the connecting shaft (62) is in a critical state of rotation.

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