Motor testing equipment and motor testing method

Abstract

The invention relates to a motor test device and a motor test method, which can improve the calibration precision of a tested encoder or a tested torque sensor, the motor test device comprises a test assembly, the test assembly comprises a mounting rack and a sensor module arranged on the mounting rack, the sensor module is used for testing an encoder or a torque sensor of the tested motor; the twin-trawling motor assembly is installed on the installation frame, and a motor shaft of the twin-trawling motor assembly is arranged in the vertical direction; the cover plate assembly is in separable transmission connection with the motor shaft, and the cover plate assembly is used for fixing a rotor of a tested motor; the jig assembly is arranged below the cover plate assembly, and the jig assembly is used for fixing a stator of a tested motor; and the jacking assembly is used for fixing the jig assembly and lifting the jig assembly in the vertical direction, the jacking assembly is provided with a test plate, and the test plate is used for being electrically conducted with a test contact of the tested motor.

Description

Technical Field

[0001] The present invention relates to the technical field of motor detection, in particular to a motor testing device and a motor testing method. Background Art

[0002] In the prior art method for testing the error of the motor's built-in encoder, a high-precision encoder is used to test the error of the motor's built-in encoder, and calibration is performed based on the result to improve the accuracy of the motor's encoder.

[0003] Existing calibration equipment uses a flat, direct-connect structure, with both an encoder and a torque sensor for simultaneous detection and calibration. This solution generates torque between the torque and encoder calibration processes, leading to unstable test data and significant deviations. Furthermore, the calibration equipment's jig press-fitting system uses manual side-mounting, with a knob used to secure the jig from the side. This structure results in an unstable press-fit between the jig's circuit board and the product under test, and is inconvenient to operate, impacting work efficiency. Similar issues exist with torque calibration. Summary of the Invention

[0004] Based on this, it is necessary to propose a motor testing device to address the problem of insufficient stability and accuracy of calibration equipment for standard motor encoders or torque sensors. A motor testing method is also proposed.

[0005] In a first aspect of the present application, a motor testing device comprises: a test assembly, the test assembly comprising a mounting frame, a sensor module arranged on the mounting frame, the sensor module being used to test the encoder or torque sensor of the motor under test; a tow motor assembly mounted on the mounting frame, the motor shaft of the tow motor assembly being arranged in a vertical direction; a cover assembly being detachably connected to the motor shaft in a transmission manner, the cover assembly being used to fix the rotor of the motor under test; a fixture assembly being arranged below the cover assembly, the fixture assembly being used to fix the stator of the motor under test; a lifting assembly, the lifting assembly being used to fix the fixture assembly and lift the fixture assembly in a vertical direction, the lifting assembly being provided with a test plate, the test plate being used to be electrically conductive with the test contacts of the motor under test.

[0006] In some embodiments, the test assembly includes, arranged vertically from top to bottom: a bearing seat with a transmission shaft therein, a support platform, a first coupling rotatably mounted in the support platform, the first coupling connecting the transmission shaft and the cover assembly; the pair motor assembly includes a motor mounting plate, a main motor fixed to the motor mounting plate, and a second coupling, the motor mounting plate is fixed to the mounting frame, the second coupling connecting the motor shaft and the transmission shaft; the sensor module is a reading head assembly, and the reading head assembly is arranged on the support platform; or,

[0007] The test assembly includes a bearing seat with a transmission shaft therein, the lower end of the transmission shaft is connected to a third coupling, and the third coupling is connected to the cover plate assembly.

[0008] In some embodiments, the reading head assembly is disposed on a side of the support platform facing the bearing seat, and the reading head assembly includes three reading devices evenly distributed around the first coupling.

[0009] In some embodiments, the cover assembly includes a clamping body and a cover coupling, the clamping body is used to clamp and fix the rotor of the motor under test, the cover coupling is arranged on one side of the clamping body, and the cover coupling is transmission-connected to the first coupling.

[0010] In some embodiments, the clamping body includes at least two connected movable parts, each movable part is arranged at intervals in the circumferential direction and is connected as a whole at the center of the circle, and the ends of two adjacent movable parts in the circumferential direction are connected by a locking part, which enables the two adjacent movable parts to gather together so that the movable parts together form a positioning space.

[0011] In some embodiments, at least one clip assembly is further provided on the movable member, the clip assembly is rotatably connected to the movable member, and the clip assembly is provided with a hook portion.

[0012] In some embodiments, the test assembly further includes a laser displacement sensor assembly, and the cover assembly is provided with a trigger portion capable of triggering the laser displacement sensor assembly, wherein when the laser displacement sensor assembly is triggered, information is generated indicating that the cover assembly is in a position in the vertical direction capable of docking with the motor shaft.

[0013] In some embodiments, the fixture assembly includes a base plate and a spring-loaded pin disposed on the base plate, wherein the spring-loaded pin is used to electrically connect the motor under test and the test board.

[0014] In some embodiments, the jacking assembly includes a jacking plate, a jacking mechanism for driving the jacking plate to rise and fall, and a pressing mechanism; the test plate is fixed to the jacking plate; the jacking plate is used to support the fixture assembly; and the pressing mechanism is used to press and fix the fixture assembly.

[0015] A motor testing method is applied to the motor testing equipment, and the motor testing method includes the following steps: placing a motor under test, with a rotor fixed to a cover assembly and a stator fixed to a fixture assembly, on a jacking assembly; rotating the cover assembly to a position where it can be connected to a motor shaft of a tow motor assembly in a vertical direction; driving the fixture assembly upward using a jacking mechanism to achieve a transmission connection between the cover assembly and the motor shaft; fixing the fixture assembly to the jacking assembly; driving the motor under test to rotate using the tow motor assembly; and collecting data from a sensor module, and calibrating an encoder or torque sensor of the motor under test based on the data.

[0016] When in use, the motor testing equipment of the present application is used solely for calibrating the encoder or torque sensor under test, which can improve the stability and calibration accuracy of the equipment; in addition, the stator and rotor of the motor under test are fixed in the vertical direction, and a lifting assembly is provided to allow the operator to have sufficient loading and unloading space, which facilitates operation and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the overall structure of the motor testing equipment according to an embodiment of the present invention.

[0018] Figure 2 Schematic diagram of the structure of the test component of an embodiment of the present invention.

[0019] Figure 3 Schematic diagram of the structure of the tow motor assembly according to an embodiment of the present invention.

[0020] Figure 4 Schematic diagram of the structure of the cover assembly according to an embodiment of the present invention.

[0021] Figure 5 Schematic diagram of the structure of a fixture assembly according to an embodiment of the present invention.

[0022] Figure 6 This is a structural schematic diagram from one perspective of a jacking assembly according to an embodiment of the present invention.

[0023] Figure 7 This is a structural schematic diagram of the jacking assembly from another perspective of an embodiment of the present invention.

[0024] Figure 8 FIG. 2 is a schematic diagram of the overall structure of a motor testing device according to another embodiment of the present invention.

[0025] Figure 9 Schematic diagram of the structure of a test component in a motor testing device according to another embodiment of the present invention.

[0026] Figure 10 Flowchart of a motor testing method according to an embodiment of the present invention.

[0027] The corresponding numbers of the relevant components in the figure are as follows:

[0028] 100, motor test equipment; 10, test assembly; 110, mounting bracket; 111, mounting hole; 120, reading head assembly; 121, reading device; 130, bottom platform; 140, bearing seat; 141, transmission shaft; 142, third coupling; 150, support platform; 151, first coupling; 160, laser displacement sensor assembly; 170, torque sensor assembly; 20, towing motor assembly; 210, motor Mounting plate; 220, main motor; 230, second coupling; 30, cover assembly; 310, clamping body; 311, movable member; 320, cover coupling; 321, connecting hole; 322, keyway; 323, triggering part; 330, locking member; 340, clamp assembly; 341, hook; 342, fixed body; 343, rotating body; 344, pivot; 345, torsion spring; 40, fixture assembly; 410, bottom plate; 411. Anti-foolproof notch; 420. Spring ejector pin; 430. Pressure block; 440. Bushing; 450. Docking station; 451. Guide column; 50. Lifting assembly; 501. Test plate; 510. Lifting plate; 511. Positioning protrusion; 512. Anti-foolproof assembly; 520. Lifting mechanism; 521. First lifting cam block; 522. Second lifting cam block; 523. Operating part; 524. Limit screw; 525. Connecting shaft; 530. Pressing mechanism; 540. Base; 550. Pressing assembly; 560. Transfer base plate assembly; 570. Guide rail and slider assembly; 571. Guide rail; 572. Slider; 580. Photoelectric sensor assembly; 60. Control cabinet. DETAILED DESCRIPTION

[0029] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0032] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0033] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0035] In one aspect, the present application provides a motor testing device for testing and calibrating an encoder or torque sensor (hereinafter referred to as a tested encoder or a tested torque sensor) of a tested motor. Preferred embodiments of the present invention are described below with reference to the accompanying drawings.

[0036] like Figures 1 to 7 As shown, the motor testing device 100 of the embodiment of the present application is specifically an encoder testing device, which includes a test assembly 10, a tow motor assembly 20, a cover assembly 30, a fixture assembly 40, and a lifting assembly 50. Among them, the test assembly 10 is used to read the angle information of the encoder under test when the rotor of the motor under test rotates. The tow motor assembly 20 drives the rotor of the motor under test to rotate through the detachably connected cover assembly 30. The fixture assembly 40 is used to fix the stator of the motor under test. The lifting assembly 50 is used to lift the motor under test so that the cover assembly 30 can be connected to or separated from the tow motor assembly 20.

[0037] refer to Figure 1 and Figure 2 , the test assembly 10 includes a vertical direction ( Figure 1 The mounting frame 110 is provided with (in the Z direction in FIG), and the sensor module connected to the mounting frame 110 is specifically a reading head assembly 120. The reading head assembly 120 is used to read the angle information of the encoder under test.

[0038] The towing motor assembly 20, the cover assembly 30, the fixture assembly 40 and the lifting assembly 50 are arranged in sequence from top to bottom in the vertical direction. Among them, the towing motor assembly 20 is installed on the mounting frame 110, and the motor shaft of the towing motor assembly 20 is arranged in the vertical direction.

[0039] The cover assembly 30 is configured to be detachably connected to the motor shaft. That is, the cover assembly 30 and the motor shaft can be connected in a transmission manner or disengaged from the rotational connection. The fixture assembly 40 is located below the cover assembly 30. During testing, the fixture assembly 40 is fixed to the stator of the motor under test, while the cover assembly 30 is fixed to the rotor of the motor under test. Thus, when the cover assembly 30 is in transmission connection with the motor shaft, the tow motor assembly 20 can drive the rotor of the motor under test to rotate.

[0040] refer to Figure 1 and Figure 6 The lifting assembly 50 is used to secure the fixture assembly 40 and vertically raise and lower it. The lifting assembly 50 is equipped with a test plate 501, which is electrically connected to the motor under test, allowing the control cabinet 60 to collect data from the motor under test. After the fixture assembly 40 is secured to the stator of the motor under test and placed on the lifting assembly 50, the test contacts of the motor under test are electrically connected to the test plate 501.

[0041] Exemplarily, the lifting assembly 50 includes a lifting plate 510, a lifting mechanism 520 for driving the lifting plate 510 up and down, and a pressing mechanism 530. The test plate 501 is fixed to the lifting plate 510. The lifting plate 510 is used to support the fixture assembly 40. The pressing mechanism 530 is used to press and fix the fixture assembly 40.

[0042] The working process of the motor testing equipment 100 of the present application is as follows: the jig assembly 40 and the cover assembly 30 are fixed to the stator and rotor of the motor under test respectively, and then placed together on the lifting assembly 50. Then, the lifting assembly 50 is raised until the cover assembly 30 can be matched with the motor shaft of the tow motor assembly 20, and the jig assembly 40 is fixed by the lifting assembly 50. Then, the tow motor assembly 20 is used to drag the motor under test to rotate. The motor testing equipment 100 obtains the angle information of the cover assembly 30 through the reading head, and then uses the control cabinet 60 to calibrate the encoder under test based on the above angle information and the angle information of the standard encoder of the main motor 220. After the calibration is completed, the cover assembly 30 is disengaged from the motor shaft of the tow motor assembly 20, and then the jig assembly 40 is used to drive the cover assembly 30 and the motor under test to descend by the lifting assembly 50, and then the jig assembly 40, the cover assembly 30 and the motor under test are removed.

[0043] When in use, the motor testing equipment 100 of the present application is used solely for calibrating the encoder under test, which can improve the stability of the equipment and the calibration accuracy; in addition, the stator and rotor of the motor under test are fixed in the vertical direction, and the jacking assembly 50 is provided so that the operator has sufficient loading and unloading space, which facilitates operation and improves work efficiency.

[0044] The composition of each part of the motor testing device 100 of the present application is described in further detail below.

[0045] like Figure 1 and Figure 2 As shown, the test assembly 10 also includes a bottom platform 130. The mounting frame 110 is fixed to the bottom platform 130. Optionally, the motor testing equipment 100 also includes a control system, which includes a control cabinet 60. During testing, the bottom platform 130 is placed on top of the control cabinet 60. Specifically, the bottom platform 130 can be a marble platform. The mounting frame 110 is fixed to the upper surface of the bottom platform 130.

[0046] The test assembly 10 includes a Figure 1 、 Figure 2 Arranged from top to bottom (in the Z direction in the figure): a bearing seat 140 housing a transmission shaft 141 and a support platform 150. The bearing seat 140 and support platform 150 are located on the same side of the mounting frame 110. The transmission shaft 141 is rotatably supported by the bearing seat 140, with the axial direction of the transmission shaft 141 oriented in the vertical direction. A first coupling 151 is rotatably mounted in the support platform 150, connecting the transmission shaft 141 to the cover plate assembly 30.

[0047] refer to Figure 1 and Figure 3 The tow motor assembly 20 includes a motor mounting plate 210, a main motor 220 secured to the motor mounting plate 210, and a second coupling 230. The motor mounting plate 210 is secured to the mounting frame 110. The second coupling 230 connects the motor shaft to the drive shaft 141. The reading head assembly 120 is mounted on the support platform 150. The motor shaft of the tow motor assembly 20 is also the motor shaft of the main motor 220.

[0048] In this application, the rotational power of the main motor 220 is transmitted to the transmission shaft 141 through the second coupling 230, and the transmission shaft 141 is then transmitted to the cover assembly 30 through the first coupling 151, so that the main motor 220 can drag the rotor of the motor under test to rotate.

[0049] Through the above design, on the one hand, the cover assembly 30 and the transmission shaft 141 are detachably connected via the first coupling 151, and the main motor 220 and the transmission shaft 141 are detachably connected via the second coupling 230, thereby achieving a detachable transmission connection between the cover assembly 30 and the main motor 220, and facilitating the replacement of the main motor 220. On the other hand, the bearing seat 140 and the transmission shaft 141 are provided between the first coupling 151 and the main motor 220, which prevents the first coupling 151 and the second coupling 230 from swinging, thereby improving the stability of the transmission of the rotational motion of the main motor 220 to the cover coupling 320.

[0050] In this application, the bearing seat 140, the support platform 150 and the motor mounting plate 210 are all arranged on the mounting frame 110 in an adjustable manner along the vertical direction. In this way, the position can be adjusted as needed to adapt to the size of the motor being tested in the vertical direction. Figure 2 As described above, a plurality of mounting holes 111 are provided in the vertical direction on the mounting frame 110. The motor mounting plate 210 and the like can be fixed at different heights in the vertical direction by cooperating with the mounting holes 111 at different heights.

[0051] In this application, the bearing seat 140, the support platform 150 and the motor mounting plate 210 are all fixed to the mounting frame 110. By ensuring the verticality of the mounting frame 110 and the bottom platform 130, the axial direction of the transmission shaft 141 can be guaranteed to be in the vertical direction, so that the transmission shaft 141 can be stably transmitted between the cover assembly 30 and the towing motor assembly 20.

[0052] refer to Figure 1 and Figure 2 In the present application, the reading head assembly 120 is arranged on the side of the support platform 150 facing the bearing seat 140, and the reading head assembly 120 includes three reading devices 121 evenly distributed around the first coupling 151.

[0053] Reading head assembly 120 is used to obtain the angular information of the cover coupling 320 during rotation. Cover coupling 320 is connected to the rotor of the motor under test via cover assembly 30. Thus, the angular information of the cover coupling 320 during rotation can be used as the angular information of the encoder under test during rotation.

[0054] In this application, the reading head assembly 120 includes three reading devices 121, each of which independently tests the angle information and compensates the information of the measured encoder according to the algorithm, so that the information of the compensated measured encoder approaches the information of the standard encoder, thereby improving the calibration accuracy.

[0055] The reading head assembly 120 is arranged on the side of the support platform 150 facing the bearing seat 140, so it does not affect the docking or disengagement with the lower end of the first coupling 151 and the cover assembly 30.

[0056] refer to Figure 1 and Figure 4 The cover assembly 30 includes a clamping body 310 and a cover coupling 320. The clamping body 310 is used to clamp and fix the rotor of the motor under test. The cover coupling 320 is provided on one side of the clamping body 310 and is drivingly connected to the motor shaft of the tow motor assembly 20.

[0057] Specifically, the bottom of the clamping body 310 is used to clamp the rotor of the motor under test, and the top is provided with a cover plate coupling 320. A connection hole 321 is provided on the top surface of the cover plate coupling 320, and a keyway 322 is provided in the wall of the connection hole 321. The cover plate coupling 320 can be detachably connected to the first coupling 151. The keyway 322 is designed to mate with the key on the first coupling 151, allowing the first coupling 151 to transmit rotational power to the cover plate assembly 30.

[0058] The specific structure of the clamping body 310 is not particularly limited, as long as it can clamp the rotor of the motor under test.

[0059] In one embodiment, reference is made to Figure 4The clamping body 310 includes at least two connected movable parts 311. The movable parts 311 are arranged at intervals in the circumferential direction and are connected as a whole at the center of the circle. The ends of the two adjacent movable parts 311 in the circumferential direction are connected by a locking part 330. The locking part 330 enables the two adjacent movable parts 311 to gather together so that the movable parts 311 can jointly form a positioning space.

[0060] In this embodiment, the clamping body 310 includes two movable members 311, which are spaced apart in the circumferential direction. The two ends of each movable member 311 are adjacent to the two ends of the other movable member 311, corresponding one-to-one. In addition, the middle portion of each movable member 311 is integrally connected to the middle portion of the other movable member 311 via a cover coupling 320. This design provides each movable member 311 with a certain degree of elasticity relative to the cover coupling 320, allowing it to move away from or toward each other under the action of external forces, and to return to its original position after the external forces are removed.

[0061] The two movable members 311 are configured to jointly clamp the rotor of the motor under test. Specifically, the lower end of each movable member 311 may be configured to have a recessed portion. When the clamping body 310 clamps the rotor of the motor under test, the recessed portions of the two movable members 311 are used to jointly accommodate the rotor of the motor under test. In this case, the recessed portions of the two movable members 311 jointly form the aforementioned positioning space.

[0062] In the present application, the two movable members 311 are brought together by the locking member 330. The degree of convergence of the two movable members 311 can be varied by adjusting the degree of tightening of the locking member 330. When the clamping body 310 is used to clamp the rotor of the motor under test, the locking member 330 is first loosened, the rotor of the motor under test is then placed into the recess of the movable member 311, and the locking member 330 is then tightened to secure the rotor of the motor under test.

[0063] Optionally, the locking member 330 is a locking screw. The locking screw is inserted into the two movable members 311, with the end of the locking screw threadedly connected to one of the movable members 311 and the head resting on the other movable member 311. In this way, by rotating the locking screw, the degree of convergence of the two movable members 311 can be changed.

[0064] Furthermore, at least one clamp assembly 340 is provided on the movable member 311, and the clamp assembly 340 is rotatably connected to the movable member 311. The clamp assembly 340 has a hook portion 341. The clamp assembly 340 can further clamp the rotor of the motor under test and thus hook the rotor in the vertical direction.

[0065] like Figure 4As shown, a clamp assembly 340 is provided on each of the two movable parts 311, and the two clamp assemblies 340 can clamp the rotor of the motor under test in opposite directions. The clamp assembly 340 includes a fixed body 342, a rotating body 343 with a hook portion 341, a pivot 344 and a torsion spring 345. The fixed body 342 is fixed to the top of the movable part 311 or is integrally formed with the movable part 311. The rotating body 343 is rotatably connected to the fixed body 342 via the pivot 344. The bottom end of the rotating body 343 is provided with the above-mentioned hook portion 341, and the hook portion 341 is located below the movable part 311. The axial direction of the pivot 344 is perpendicular to the axial direction of the cover coupling 320. The torsion spring 345 is arranged between the rotating body 343 and the fixed body 342. When an external force is applied to the rotating body 343, the bottom end of the rotating body 343 flips outward in the radial direction of the cover coupling 320.

[0066] The present application provides a clamp assembly 340 that can cooperate with the movable member 311 to further firmly clamp the motor under test, and the hook portion 341 of the clamp assembly 340 can hook the rotor in the vertical direction. In this way, the connection between the cover assembly 30 and the rotor of the motor under test is more reliable.

[0067] The cover assembly 30 of the present application fixes the rotor of the motor under test in the clamping body 310, and further uses the clamp assembly 340 to fix and press it, so that the motor under test and the cover assembly 30 are tightly attached. During the test, the motor under test will not sway or shake, thereby ensuring the stability and accuracy of the test data and improving the test and calibration accuracy.

[0068] refer to Figure 1 、 Figure 2 and Figure 4 , in order to facilitate the matching of the cover assembly 30 and the first coupling 151. The test assembly 10 also includes a laser displacement sensor assembly 160. The cover assembly 30 is provided with a triggering portion 323 capable of triggering the laser displacement sensor assembly 160, wherein when the laser displacement sensor assembly 160 is triggered, information representing the position in which the cover assembly 30 can be docked with the motor shaft in the vertical direction is generated. When the cover assembly 30 is in a position in which it can be docked with the motor shaft in the vertical direction, the connecting hole 321 of the cover coupling 320 is aligned with the first coupling 151 in the vertical direction. Afterwards, when the cover assembly 30 continues to rise, the cover coupling 320 is matched with the first coupling 151.

[0069] In the embodiment of the present application, the laser displacement sensor assembly 160 is specifically disposed on the bottom platform 130, and its vertical height is lower than the first coupling 151. Figure 4 The trigger portion 323 is specifically a window on the outer peripheral wall of the cover coupling 320.

[0070] During testing, when the cover assembly 30, the motor under test, and the fixture assembly 40 are connected and placed on the lifting assembly 50, the trigger portion 323 is vertically aligned with the laser displacement sensor assembly 160. Thus, by rotating the cover assembly 30, the trigger portion 323 can be aligned with the laser displacement sensor assembly 160. When triggered, the laser displacement sensor assembly 160 transmits information indicating that the cover assembly 30 is in a vertical position capable of docking with the motor shaft.

[0071] Optionally, the laser displacement sensor assembly 160 is in communication with an alarm device. After receiving the information sent by the laser displacement sensor assembly 160, the alarm device may send a prompt signal such as sound or light.

[0072] like Figure 5 As shown, the fixture assembly 40 includes a base plate 410 and a spring-loaded ejector pin 420 disposed on the base plate 410. The spring-loaded ejector pin 420 is used to electrically connect the motor under test and the test board 501. The bottom of the base plate 410 is used to be placed on the lifting assembly 50 and fixed by the lifting assembly 50.

[0073] The circumferential edge of the base plate 410 is provided with a pressure block 430 and a bushing 440. The number of each of the pressure blocks 430 and the bushing 440 is two. In this embodiment, the base plate 410 is rectangular, and two pressure blocks 430 are provided at one pair of diagonal corners, and two bushings 440 are provided at the other pair of diagonal corners. The pressure block 430 is used to cooperate with the pressing mechanism 530 of the jacking assembly 50. The bushing 440 is used to guide and cooperate with the positioning protrusion 511 of the jacking assembly 50. It can be understood that the number and position of the pressure blocks 430 and the bushing 440 are not limited to the above examples.

[0074] A docking platform 450 is provided on the top of the base plate 410. The spring ejector pin 420 is disposed on the docking platform 450. A guide post 451 is also provided on the docking platform 450. The guide post 451 is used to engage with a corresponding hole in the stator of the motor under test.

[0075] When the fixture assembly 40 is assembled with the stator of the motor under test, the holes on the stator of the motor under test are plugged into and matched with the guide pillars 451 , while the stator rests on the docking platform 450 , and the test contacts of the motor under test are matched with the spring pins 420 .

[0076] The jig assembly 40 of the present application secures the motor under test to the jig top plate, with the test contacts elastically abutting against the spring-loaded ejector pins 420, thereby ensuring close contact and continuity. The jig assembly 40 is positioned within the lifting assembly 50 through the engagement of the bushing 440 and the positioning protrusion 511, ensuring no displacement. This ensures close contact and continuity between the spring-loaded ejector pins 420 and the test contacts of the motor under test, thereby ensuring calibration of the encoder under test.

[0077] refer to Figure 1、 Figure 6 and Figure 7 The lifting assembly 50 also includes a base 540 , a crimping assembly 550 and a transfer base plate assembly 560 .

[0078] The lifting mechanism 520 and the pressing mechanism 530 are both mounted on the base 540. The crimping assembly 550 and the transfer substrate assembly 560 are fixed to the upper and lower sides of the test board 501, respectively, and are electrically connected to each other. The crimping assembly 550 is used to contact and connect the spring pins 420, thereby connecting the test contacts of the motor under test to the transfer substrate assembly 560. The transfer substrate assembly 560 is in communication with the control system.

[0079] In the above design, the transfer substrate assembly 560 is located in the gap between the base 540 and the test board 501, facilitating communication with the control system. The crimping assembly 550 elastically abuts and tightly contacts the spring pins 420, ensuring a stable electrical connection between the transfer substrate assembly 560 and the test contacts of the motor under test.

[0080] refer to Figure 6 and Figure 7 The lifting assembly 50 further includes a guide rail and slider assembly 570. The guide rail and slider assembly 570 includes a guide rail 571 and a slider 572 that slide in a vertical direction. One of the guide rail 571 and the slider 572 is fixed to the base 540, and the other is connected to the lifting plate 510. Thus, the lifting plate 510 and the base 540 are slidably connected in the vertical direction, guiding the lifting plate 510 to rise and fall, and preventing it from swinging during the lifting process.

[0081] refer to Figure 6 and Figure 7 The lifting assembly 50 further includes a photoelectric sensor assembly 580. The photoelectric sensor assembly 580 is disposed on one side of the lifting plate 510 and is used to detect whether a motor to be tested is placed on the lifting plate 510.

[0082] refer to Figure 6 and Figure 7 The lifting assembly 50 further includes a foolproof assembly 512. The foolproof assembly 512 is disposed on the upper surface of the lifting plate 510 and is configured to engage with the foolproof notch 411 of the base plate 410 to ensure that the jig assembly 40 is correctly assembled and installed on the lifting assembly 50, thereby improving assembly efficiency. The foolproof assembly 512 may include a plurality of bumps.

[0083] refer to Figure 6 and Figure 7 For example, the lifting mechanism 520 is a manual rotary lifting mechanism. Specifically, the lifting mechanism 520 includes a first lifting cam block 521 , a second lifting cam block 522 , an operating member 523 , and a limit screw 524 .

[0084] The first and second lifting cam blocks 521, 522 are spaced apart and connected to the respective ends of the lifting plate 510 in the longitudinal direction. An operating member 523 is rotatably connected to the base 540, and the operating member 523 is connected to the first and second lifting cam blocks 521, 522 via a connecting shaft 525. A stop screw 524 is provided on the base 540 and is located in the rotational path of the operating member 523 when the lifting plate 510 is raised.

[0085] When the operating member 523 rotates, the first lifting cam block 521 and the second lifting cam block 522 can drive the lifting plate 510 to rise or fall, and when the lifting plate 510 rises, the operating member 523 is hard-limited by the limit screw 524 to avoid excessive lifting.

[0086] refer to Figure 6 and Figure 7 , exemplarily, the pressing mechanism 530 is specifically a toggle clamp assembly that can be manually operated.

[0087] refer to Figure 8 and Figure 9 In another embodiment of the present application, the motor testing device 100 is specifically a torque sensor testing device.

[0088] The motor testing device of this embodiment differs from the previous embodiment only in the structure of the test assembly 10. In this embodiment, the sensor module in the test assembly 10 is specifically a torque sensor assembly 170, which is used to obtain torque information when the rotor of the motor under test rotates.

[0089] Specifically, the test assembly 10 includes a mounting frame 110, a bottom platform 130, a bearing seat 140 with a transmission shaft 141 therein, a laser displacement sensor assembly 160, and a torque sensor assembly 170. The transmission shaft 141 is rotatably supported on the bearing seat 140, and the axial direction of the transmission shaft 141 is along the vertical direction. A third coupling 142 is provided below the bearing seat 140. The transmission shaft 141 is connected to the second coupling 230 of the tow motor assembly 20. The third coupling 142 is connected to the lower end of the transmission shaft 141 and is used for transmission connection with the cover plate coupling 320. The torque sensor assembly 170 is provided on the bearing seat 140 to detect the torque of the transmission shaft 141, and then obtain the torque information when the rotor of the motor under test rotates.

[0090] In this embodiment, the working process is similar to that of the previous embodiment, except that the motor testing device 100 obtains the torque of the rotor of the motor under test when it rotates, and then calibrates the torque sensor of the motor under test based on this information.

[0091] A second aspect of the present application provides a motor testing method, which is applied to the motor testing device 100 of the aforementioned embodiment to test and calibrate an encoder or torque sensor of a motor under test.

[0092] refer to Figure 10 , the motor testing method comprises the steps of:

[0093] S100 , placing the motor under test, with its rotor fixed to the cover assembly 30 and its stator fixed to the fixture assembly 40 , on the lifting assembly 50 .

[0094] Specifically, the clamping body 310 of the cover assembly 30 clamps the rotor, and the clamp assembly 340 clamps and hooks the rotor; the holes on the stator of the motor under test are plugged into and matched with the guide posts 451 of the fixture assembly 40, while the stator rests on the docking station 450, and the test contacts of the motor under test cooperate with the spring pins 420.

[0095] S200 , rotating the cover assembly 30 to a position where the cover assembly 30 can be docked with the motor shaft of the towing motor assembly 20 in the vertical direction.

[0096] Specifically, the cover assembly 30 is rotated so that the cover coupling 320 is in a position to be matched with the first coupling 151 in the vertical direction. As mentioned above, the laser displacement sensor assembly 160 can be used to assist in determining the position of the cover assembly 30.

[0097] S300 , using the lifting mechanism 520 to drive the fixture assembly 40 to rise, so that the cover assembly 30 is in transmission connection with the motor shaft.

[0098] Specifically, the cover coupling 320 is transmission-connected to the first coupling 151 or the third coupling 142 .

[0099] S400 , fixing the fixture assembly 40 to the lifting assembly 50 .

[0100] Specifically, the bottom plate 410 is pressed tightly by the pressing mechanism 530. In this way, the assembly of the motor under test, the cover assembly 30 and the fixture assembly 40 is fixed to the lifting plate 510 of the lifting assembly 50. The assembly can be raised and lowered in the vertical direction.

[0101] S500: Use the tow motor assembly 20 to drive the motor under test to rotate.

[0102] Specifically, the main motor 220 is started to drive the rotor of the motor under test to rotate.

[0103] S600: Collect data from the reading head assembly 120 or the torque sensor assembly 170, and calibrate the encoder of the motor under test or the torque sensor under test based on the data.

[0104] Specifically, the control system collects data from the reading head assembly 120 and uses the data to calibrate the encoder or torque sensor under test.

[0105] The motor testing method of this application independently calibrates the encoder or torque sensor under test, achieving high stability and calibration accuracy. Furthermore, the cover assembly 30 is connected to the main motor 220 after the motor under test is loaded vertically, providing the operator with ample space for loading and unloading materials, facilitating operation and improving work efficiency.

[0106] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0107] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A motor testing device, characterized in that: include: A test assembly, the test assembly comprising a mounting frame and a sensor module disposed on the mounting frame, the sensor module being used to test an encoder or a torque sensor of a motor under test; A tow motor assembly is mounted on the mounting frame, wherein the motor shaft of the tow motor assembly is arranged in a vertical direction; a cover plate assembly, detachably connected to the motor shaft in a transmission manner, the cover plate assembly being used to fix the rotor of the motor under test; a fixture assembly, disposed below the cover assembly, the fixture assembly being used to fix the stator of the motor under test; and A lifting assembly is used to fix the fixture assembly and lift the fixture assembly in a vertical direction. The lifting assembly is provided with a test plate, and the test plate is used to be electrically connected to the test contacts of the motor under test.

2. The motor testing device according to claim 1, characterized in that: The test assembly includes, arranged vertically from top to bottom: a bearing seat with a transmission shaft therein, and a support platform, wherein a first coupling is rotatably mounted in the support platform, and the first coupling connects the transmission shaft and the cover assembly; The tow motor assembly includes a motor mounting plate, a main motor fixed to the motor mounting plate, and a second coupling, wherein the motor mounting plate is fixed to the mounting frame, and the second coupling connects the motor shaft and the transmission shaft; The sensor module is a reading head assembly, and the reading head assembly is arranged on the support platform; or, The test assembly includes a bearing seat with a transmission shaft therein, the lower end of the transmission shaft is connected to a third coupling, and the third coupling is connected to the cover plate assembly.

3. The motor testing device according to claim 2, characterized in that: The reading head assembly is arranged on a side of the support platform facing the bearing seat, and the reading head assembly includes three reading devices evenly distributed around the first coupling.

4. The motor testing device according to claim 2, characterized in that: The cover plate assembly includes a clamping body and a cover plate coupling. The clamping body is used to clamp and fix the rotor of the motor under test. The cover plate coupling is arranged on one side of the clamping body and is transmission-connected to the first coupling.

5. The motor testing device according to claim 4, characterized in that: The clamping body includes at least two connected movable parts, each movable part is arranged at intervals in the circumferential direction and is connected as a whole at the center of the circle. The ends of two adjacent movable parts in the circumferential direction are connected by a locking part, and the locking part enables the two adjacent movable parts to gather together so that the movable parts together form a positioning space.

6. The motor testing device according to claim 5, characterized in that: At least one clip assembly is also provided on the movable part. The clip assembly is rotatably connected to the movable part, and the clip assembly is provided with a hook portion.

7. The motor testing device according to claim 1, characterized in that: The test assembly also includes a laser displacement sensor assembly. The cover assembly is provided with a triggering portion capable of triggering the laser displacement sensor assembly, wherein when the laser displacement sensor assembly is triggered, it generates information indicating that the cover assembly is in a position in the vertical direction capable of docking with the motor shaft.

8. The motor testing device according to claim 1, characterized in that: The fixture assembly includes a base plate and a spring ejector pin arranged on the base plate, and the spring ejector pin is used to electrically connect the motor under test and the test board.

9. The motor testing device according to claim 1, characterized in that: The jacking assembly includes a jacking plate, a jacking mechanism for driving the jacking plate to rise and fall, and a pressing mechanism; the test plate is fixed to the jacking plate; the jacking plate is used to support the fixture assembly; and the pressing mechanism is used to press and fix the fixture assembly.

10. A motor testing method, characterized in that: Applied to the motor testing device according to any one of claims 1 to 9, the motor testing method comprises the steps of: Place the motor under test with the rotor fixed to the cover assembly and the stator fixed to the fixture assembly on the jacking assembly; Rotate the cover assembly to a position where it can dock with the motor shaft in the vertical direction; The jacking mechanism is used to drive the fixture assembly to rise, so that the cover assembly is connected to the motor shaft of the towing motor assembly; Fix the fixture assembly to the jacking assembly; Use the tow motor assembly to drive the motor under test to rotate; The data of the sensor module is collected, and the encoder or torque sensor of the motor under test is calibrated based on the data.

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