A motor testing device

Abstract

The application discloses a motor testing device, which comprises a control module, a workbench, a dynamometer mechanism, a to-be-tested adjusting mechanism and a scanning mechanism arranged on the workbench. The dynamometer mechanism comprises a reference shaft and a measuring assembly. The measuring assembly is connected with the reference shaft. The reference shaft is used for being connected with a motor shaft of a to-be-tested motor. The to-be-tested adjusting mechanism comprises a three-dimensional adjusting assembly and a clamp installed on the three-dimensional adjusting assembly. The three-dimensional adjusting assembly is used for driving the clamp to move in the X-axis, Y-axis or Z-axis direction. The scanning mechanism comprises a three-dimensional scanning module. The scanning direction of the three-dimensional scanning module is towards the reference shaft and the motor shaft of the to-be-tested motor, and is used for collecting three-dimensional point cloud data of the reference shaft and the motor shaft of the to-be-tested motor. The input end of the control module is electrically connected with the three-dimensional scanning module, and the output end is electrically connected with the three-dimensional adjusting assembly. The device can realize three-dimensional direction adjustment, and improves the coaxiality of the motor shaft of the to-be-tested motor and the reference shaft of the dynamometer.

Description

Technical Field

[0001] This application relates to the field of motor testing technology, specifically to a motor testing device. Background Technology

[0002] To ensure the quality of motor production, its performance must be tested before it leaves the factory.

[0003] In traditional motor testing equipment, a torque sensor is connected to both a dynamometer and the motor under test via a coupling to measure the output speed and torque of the motor under test. During the assembly of the dynamometer and the motor under test, it is necessary to ensure the coaxiality of their shafts, i.e., to adjust the coaxiality between the motor shaft of the motor under test and the reference shaft of the dynamometer.

[0004] Traditional motor testing devices have difficulty simultaneously measuring the deviation of the motor shaft of the motor under test relative to the reference axis of the dynamometer in the XYZ directions, resulting in low coaxiality and affecting the test accuracy. Utility Model Content

[0005] This application aims to provide a motor testing device that can simultaneously achieve three-dimensional adjustment, improve the coaxiality between the motor shaft of the motor under test and the reference shaft of the dynamometer, and improve testing accuracy.

[0006] This application provides a motor testing device, including a control module, a workbench, and a dynamometer mechanism, an adjustment mechanism to be tested, and a scanning mechanism disposed on the workbench;

[0007] The dynamometer mechanism includes a reference shaft and a measuring component. The measuring component is connected to the reference shaft, and the reference shaft is used to connect to the motor shaft of the motor under test.

[0008] The adjustment mechanism under test includes a three-dimensional adjustment component and a clamp mounted on the three-dimensional adjustment component. The clamp is used to hold the motor under test, and the three-dimensional adjustment component is used to drive the clamp to move in the X-axis, Y-axis or Z-axis direction.

[0009] The scanning mechanism includes a three-dimensional scanning module, the scanning direction of which is toward the reference axis and the motor shaft of the motor under test, and is used to collect three-dimensional point cloud data of the reference axis and the motor shaft of the motor under test;

[0010] The input terminal of the control module is electrically connected to the three-dimensional scanning module, and the output terminal of the control module is electrically connected to the three-dimensional adjustment component. The control module is used to calculate the X-axis offset, Y-axis offset, and Z-axis offset of the motor shaft of the motor under test relative to the reference axis based on the three-dimensional point cloud data, and to control the three-dimensional adjustment component according to the X-axis offset, the Y-axis offset, and the Z-axis offset, respectively.

[0011] In some embodiments, the scanning mechanism further includes a support, and the three-dimensional scanning module comprises at least two image acquisition modules disposed on the support, wherein the scanning directions of the at least two image acquisition modules are perpendicular to each other.

[0012] In some embodiments, the three-dimensional adjustment component includes an X-axis movement component, a Y-axis movement component, and a Z-axis movement component. The X-axis movement component is mounted on the worktable, the Y-axis movement component is mounted on the X-axis movement component, the Z-axis movement component is mounted on the Y-axis movement component, and the fixture is mounted on the Z-axis movement component.

[0013] In some embodiments, the clamp includes a body, a rotating member, a driving member, and a gripper. The body is slidably connected to the gripper. The body has an inner cavity, and the rotating member is disposed in the inner cavity. The clamp has a plurality of teeth. One end of the rotating member has a helical groove that engages with the plurality of teeth. The rotating member is used to adjust the size of the gripping space of the gripper by rotation. The other end of the rotating member is connected to the driving member and is used to rotate in response to the driving member.

[0014] In some embodiments,

[0015] The driving component includes a motor, which is fixed to the body and its output shaft is fixedly connected to the rotating component.

[0016] And / or,

[0017] The driving component includes an adjustment knob, which comprises an adjustment part and a first gear part fixedly connected together; the side wall of the main body is provided with a mounting hole, the adjustment part is rotatably mounted in the mounting hole, and the outer side of the adjustment part is provided with an operating part that cooperates with an operating tool; the rotating component is provided with a second gear part that meshes with the first gear part.

[0018] In some embodiments, the adjustment mechanism under test further includes a driver for driving the motor under test to rotate.

[0019] In some embodiments, the dynamometer mechanism further includes a first cross coupling for connecting the reference shaft to the motor shaft of the motor under test.

[0020] In some embodiments, the dynamometer mechanism further includes a rotary drive member connected to the reference shaft, the rotary drive member being used to drive the motor under test to rotate via the reference shaft.

[0021] In some embodiments, the dynamometer mechanism further includes a second cross coupling, through which the rotary drive is connected to the reference shaft.

[0022] In some embodiments, the dynamometer mechanism further includes a slide rail disposed on the worktable, and the bottom of the measuring component is provided with a slide groove that cooperates with the slide rail. The distance between the reference axis connected to the measuring component and the fixture is adjusted by the cooperation between the slide groove and the slide rail.

[0023] According to the motor testing device of the above embodiment, the three-dimensional scanning module can accurately and quickly collect three-dimensional point cloud data of the motor shaft and the reference shaft of the motor under test, and the control module calculates the offset of the motor shaft of the motor under test relative to the reference shaft in the three-dimensional direction based on the three-dimensional point cloud data, thereby realizing the adjustment in the three-dimensional direction, improving the coaxiality of the motor shaft of the motor under test and the reference shaft of the dynamometer, and improving the testing accuracy. Attached Figure Description

[0024] Figure 1 The three-dimensional representation of the motor testing device provided in this application Figure 1 ;

[0025] Figure 2 This is a schematic diagram of the motor under test in the motor testing device provided in this application before it is connected to the reference shaft;

[0026] Figure 3 This is a top view of the motor under test in the motor testing device provided in this application before it is aligned with the reference shaft;

[0027] Figure 4 This is a front view of the motor under test in the motor testing device provided in this application before it is aligned with the reference shaft.

[0028] Figure 5 The three-dimensional representation of the motor testing device provided in this application Figure 2 ;

[0029] Figure 6 A perspective view of the X-axis moving component in the motor testing device provided in this application;

[0030] Figure 7 A perspective view of the Z-axis movement component in the motor testing device provided in this application;

[0031] Figure 8 A perspective view of the fixture in the motor testing apparatus provided in this application;

[0032] Figure 9 A cross-sectional view of the fixture in the motor testing device provided in this application.

[0033] Figure label:

[0034] Motor testing device 100;

[0035] Dynamometer mechanism 10, reference shaft 11, measuring component 12, first cross coupling 13, rotary drive component 14, second cross coupling 15, base 16, slide rail 161, slider 17, slide groove 171.

[0036] The components include: adjustment mechanism under test 20, three-dimensional adjustment component 201, X-axis moving component 21, X-axis drive motor 211, X-axis moving slider 212, X-axis mounting bracket 213, Y-axis moving component 22, Y-axis drive motor 221, Y-axis moving slider 222, Y-axis mounting bracket 223, Z-axis moving component 23, Z-axis drive motor 231, Z-axis guide slider 232, Z-axis guide rail 233, Z-axis lead screw 234, Z-axis moving slider 235, Z-axis mounting bracket 236, Z-axis connecting bracket 237, clamp 24, body 241, inner cavity 2411, mounting hole 2412, slide 2413, rotating component 242, spiral groove 2421, driving component 243, motor 2431, first gear part 2432, gripper 244, tooth part 2441, and adjustment part 245.

[0037] Scanning mechanism 30, 3D scanning module 31, support 32, image acquisition module 311;

[0038] Workbench 50;

[0039] The motor under test is 200, and the motor shaft is 201. Detailed Implementation

[0040] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0041] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments, and the operational steps involved in each embodiment can also be rearranged or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for clearly describing a particular embodiment and do not imply that they represent the necessary components and / or order.

[0042] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0043] Motor testing equipment is used to test the torque, speed, and other performance characteristics of motors before they leave the factory. A dynamometer is connected to the motor under test via a torque sensor. The dynamometer outputs rotational motion, causing the motor under test to rotate synchronously. The torque sensor is connected to the reference axis of the dynamometer to measure the performance of the motor under test. Before measurement, it is necessary to ensure that the reference axis of the dynamometer is coaxial with the motor shaft of the motor under test. Coaxiality is typically adjusted using a laser collimation method.

[0044] The laser collimation method involves installing a laser emitter on the reference axis of the dynamometer and a target on the motor shaft of the motor under test. The laser emitter emits a laser beam toward the target, and the three-dimensional position of the motor under test is adjusted by the deviation of the position of the laser spot hitting the target. However, due to the influence of the positional relationship between the laser emitter and the target, only two-dimensional plane (XY plane) adjustment can be achieved, and the deviation in the Z-axis direction needs to be calibrated separately.

[0045] Therefore, the method of adjusting the coaxiality of the reference axis of the dynamometer and the motor shaft of the motor under test in the related technology cannot simultaneously measure the deviation in the three directions of XYZ, resulting in low coaxiality and poor measurement accuracy.

[0046] See Figure 1 and Figure 2 As shown, the motor testing device 100 provided in this application includes a dynamometer mechanism 10, a test adjustment mechanism 20, a scanning mechanism 30, a control module, and a workbench 50. The dynamometer mechanism 10, the test adjustment mechanism 20, and the scanning mechanism 30 are all mounted on the workbench 50. The workbench 50 is usually made of granite, and its surface for mounting other mechanisms is relatively flat. Its own weight can attenuate the vibration generated by the motor rotation during the test (usually the attenuation rate is >90%), and the test accuracy can be maintained under a vibration environment of 10g.

[0047] Of course, in other embodiments, the workbench 50 may not be provided, and the dynamometer 10, the adjustment mechanism to be tested 20, and the scanning mechanism 30 may be fixed on a relatively flat ground, which can also achieve the goal of ensuring test accuracy.

[0048] In the following embodiments, the dynamometer 10, the adjustment mechanism to be tested 20, and the scanning mechanism 30 are installed on the workbench 50 as an example for illustration.

[0049] The dynamometer mechanism 10 includes a reference shaft 11 and a measuring component 12. The measuring component 12 is connected to the reference shaft 11, which is used to connect to the motor shaft 201 of the motor under test 200. Before connecting the reference shaft 11 to the motor shaft 201 of the motor under test 200, the coaxiality of the motor shaft 201 and the reference shaft 11 needs to be adjusted so that the deviation between them in the XYZ directions is ≤2μm. After adjustment, the reference shaft 11 can be connected to the motor shaft 201 of the motor under test 200, and the performance of the motor under test 200 can be tested through the measuring component 12.

[0050] The measuring component 12 preferably employs a torque sensor to test the torque and speed of the motor under test 200. Of course, in other embodiments, the measuring component 12 may also be other sensors to test other performance characteristics of the motor under test 200.

[0051] After adjusting the coaxiality of the motor shaft 201 of the motor under test 200 with the reference shaft 11, the motor shaft 201 of the motor under test 200 is connected to the reference shaft 11, and the measuring component 12 is connected to the reference shaft 11 to measure the performance (torque and speed) of the motor under test 200.

[0052] In this embodiment, the reference axis 11 is mounted on the measuring component 12, and the measuring component 12 is mounted on the worktable 50 via the base 16.

[0053] The adjustment mechanism 20 under test includes a three-dimensional adjustment component 201 and a clamp 24. The clamp 24 is mounted on the three-dimensional adjustment component 201 and is used to hold the motor 200 under test. The three-dimensional adjustment component 201 is used to drive the clamp 24 in the X-axis, Y-axis or Z-axis direction (e.g., ...). Figure 1 The motor shaft 201 of the motor under test 200 (shown in the XYZ axis direction) moves synchronously to drive the motor under test 200 held on the fixture 24 to move in the X-axis, Y-axis or Z-axis direction, thereby adjusting the coaxiality of the motor shaft 201 of the motor under test 200 and the reference axis 11.

[0054] The movement of the three-dimensional adjustment component 201 in the X-axis, Y-axis, and Z-axis directions can be along the X-axis, Y-axis, and Z-axis directions respectively, or it can move along the X-axis, Y-axis, and Z-axis directions simultaneously. The order of movement along the X-axis, Y-axis, and Z-axis directions is not limited. It can move along the X-axis, Y-axis, and Z-axis directions in sequence, or it can move along the Y-axis, X-axis, and Z-axis directions in sequence, and so on.

[0055] The scanning mechanism 30 includes a three-dimensional scanning module 31. The scanning direction of the three-dimensional scanning module 31 is towards the reference axis 11 and the motor shaft 201 of the motor under test 200 held by the fixture 24. The three-dimensional scanning module 31 is used to acquire three-dimensional point cloud data of the reference axis 11 and the motor shaft 201 of the motor under test 200.

[0056] The input terminal of the control module is electrically connected to the 3D scanning module 31, and the output terminal of the control module is electrically connected to the 3D adjustment component 201. The 3D scanning module 31 transmits the acquired 3D point cloud data to the control module, combined with... Figure 3 and Figure 4 As shown, the control module is used to calculate the X-axis offset Lx, Y-axis offset Ly, and Z-axis offset Lz of the motor shaft 201 of the motor under test 200 relative to the reference axis 12 based on the three-dimensional point cloud data, and control the movement of the three-dimensional adjustment component 201 in the X-axis, Y-axis, and Z-axis directions based on the X-axis offset Lx, Y-axis offset Ly, and Z-axis offset Lz to adjust the X-axis offset Lx, Y-axis offset Ly, and Z-axis offset Lz.

[0057] The scanning mechanism 30 collects three-dimensional point cloud data of the reference axis 11 and the motor axis 201 of the motor under test 200 in steps, and outputs the collected three-dimensional point cloud data to the control module. For example, it collects three-dimensional point cloud data of the reference axis 11 and outputs it to the control module. The control module establishes the reference coordinate system of the reference axis 11. It collects three-dimensional point cloud data of the motor axis 201 of the motor under test 200 and outputs it to the control module. The control module establishes the test coordinate system of the motor axis 201 of the motor under test 200. The control module calculates the X-axis offset Lx, Y-axis offset Ly and Z-axis offset Lz of the motor axis 201 of the motor under test 200 relative to the reference axis 12 based on the reference coordinate system and the test coordinate system.

[0058] The control module controls the three-dimensional adjustment component 201 to move by Lx in the X-axis direction, Ly in the Y-axis direction, and Lz in the Z-axis direction, respectively, based on the X-axis offset Lx, Y-axis offset Ly, and Z-axis offset Lz. This adjusts the coaxiality of the motor shaft 201 of the motor under test 200 with the reference shaft 11, which can significantly eliminate shaft vibration (noise ≤60dB) and torque measurement error (≤±1%) when measuring the torque and speed of the motor under test 200.

[0059] In a specific embodiment, after calculating the X-axis offset Lx, Y-axis offset Ly, and Z-axis offset Lz of the motor shaft 201 of the motor under test 200 relative to the reference axis 12, the control module can generate corresponding adjustment signals, such as generating an X-axis offset adjustment signal, a Y-axis offset adjustment signal, and a Z-axis offset adjustment signal. Based on the X-axis offset adjustment signal and the X-axis offset Lx, the Y-axis offset adjustment signal and the Y-axis offset Ly, and the Z-axis offset adjustment signal and the Z-axis offset Lz, the control module controls the three-dimensional adjustment component 201 to move by a displacement of Lx in the X-axis direction, a displacement of Ly in the Y-axis direction, and a displacement of Lz in the Z-axis direction, respectively.

[0060] It should be noted that the values ​​of the X-axis offset Lx, Y-axis offset Ly, and Z-axis offset Lz can be positive or negative. When the value is positive, the corresponding displacement is moved along the positive direction of the corresponding axis; when the value is negative, the corresponding displacement is moved along the negative direction of the corresponding axis.

[0061] The 3D scanning module 31 acquires 3D point cloud data of the motor shaft 201 and the reference axis 11 of the motor under test 200. The control module calculates the X-axis offset Lx, Y-axis offset Ly, and Z-axis offset Lz of the motor shaft 201 of the motor under test 200 relative to the reference axis 12 based on the 3D point cloud data. The control module controls the 3D adjustment component 201 to move by Lx in the X-axis direction, Ly in the Y-axis direction, and Lz in the Z-axis direction based on the X-axis offset Lx, Y-axis offset Ly, and Z-axis offset Lz, respectively. Then, the 3D scanning module 31 is automatically triggered, and the control module re-checks the offset of the motor shaft 201 of the motor under test 200 relative to the reference axis 11 in the XYZ directions. When the X-axis offset Lx, Y-axis offset Ly, and Z-axis offset Lz are all ≤2μm, the 3D adjustment component 201 automatically locks and enters the test mode.

[0062] Among them, the X-axis moving component 21, Y-axis moving component 22, and Z-axis moving component 23 move in 1μm increments along their respective axes to precisely adjust the offset.

[0063] In this embodiment, from the three-dimensional scanning module 31 acquiring three-dimensional point cloud data of the motor shaft 201 and the reference axis 11 of the motor under test 200, to the control module calculating the X-axis offset Lx, Y-axis offset Ly and Z-axis offset Lz of the motor shaft 201 of the motor under test 200 relative to the reference axis 12 based on the three-dimensional point cloud data, the process takes ≤20s. The process of the control module controlling the three-dimensional adjustment component 201 to adjust the offset of the motor shaft 201 of the motor under test 200 relative to the reference axis 11 to ≤2μm usually takes ≤100ms. After that, the total time taken after the torque and speed of the motor under test 200 are measured is ≤3min.

[0064] Compared with related technologies, the three-dimensional scanning module 31 can simultaneously scan the motor shaft 201 and the reference shaft 11 of the motor under test 200 in the XYZ three-dimensional direction to obtain three-dimensional point cloud data, and can synchronously control the three-dimensional adjustment component 201 through the control module to achieve three-dimensional adjustment, thereby improving the coaxiality of the motor shaft of the motor under test and the reference shaft of the dynamometer and improving the test accuracy.

[0065] In this application, the three-dimensional adjustment component 201 includes an X-axis movement component 21, a Y-axis movement component 22, and a Z-axis movement component 23. See [link to relevant documentation]. Figure 1The XYZ coordinate system shown has an X-axis movement component 21 that outputs reciprocating linear motion along the X-axis, a Y-axis movement component 22 that outputs reciprocating linear motion along the Y-axis, and a Z-axis movement component 23 that outputs reciprocating linear motion along the Z-axis. The X-axis movement component 21 is mounted on the worktable 50, the Y-axis movement component 22 is mounted on top of the X-axis movement component 21, the Z-axis movement component 23 is mounted on top of the Y-axis movement component 22, and the fixture 24 is mounted on the Z-axis movement component 23. In this embodiment, the fixture 24 faces the reference axis 11, so that the motor shaft 201 of the motor 200 under test, held by the fixture 24, faces the reference axis 11. The reciprocating linear motion output by the X-axis moving component 21 along the X-axis direction, the reciprocating linear motion output by the Y-axis moving component 22 along the Y-axis direction, and the reciprocating linear motion output by the Z-axis moving component 23 along the Z-axis direction can simultaneously drive the motor under test 200 to move in the X, Y, and Z directions, so as to adjust the coaxiality of the motor shaft 201 of the motor under test 200 and the reference shaft 11.

[0066] It should be noted that the control module controls the X-axis moving component 21 to move by Lx in the X-axis direction, the Y-axis moving component 22 to move by Ly in the Y-axis direction, and the Z-axis moving component 23 to move by Lz in the Z-axis direction, based on the X-axis offset Lx, Y-axis offset Ly, and Z-axis offset Lz, respectively. More specifically, the control module controls the X-axis moving component 21 to move by Lx in the X-axis direction based on the X-axis offset adjustment signal and the X-axis offset Lx; the control module controls the Y-axis moving component 22 to move by Ly in the Y-axis direction based on the Y-axis offset adjustment signal and the Y-axis offset Ly; and the control module controls the Z-axis moving component 23 to move by Lz in the Z-axis direction based on the Z-axis offset adjustment signal and the Z-axis offset Lz.

[0067] See Figure 1 As shown, in one embodiment of this application, the adjustment mechanism 20 under test further includes a driver for driving the motor under test 200 to rotate. Before driving the motor under test 200 to rotate, the driver should ensure that the motor shaft 201 and the reference shaft 11 of the motor under test 200 have been adjusted for coaxiality, and that the reference shaft 11 and the motor shaft 201 are interconnected. The driver drives the motor under test 200 to rotate, and then the measurement component 12 tests the performance of the motor under test 200.

[0068] See Figure 1 , Figure 2 and Figure 4As shown, the dynamometer mechanism 10 also includes a first cross coupling 13, which connects the reference shaft 11 to the motor shaft 201 of the motor under test 200. Before connection, the coaxiality of the motor shaft 201 of the motor under test 200 and the reference shaft 11 is adjusted. During connection, one end of the first cross coupling 13 is connected to the reference shaft 11, and the other end is connected to the motor shaft 201 of the motor under test 200. The connection process can be achieved by driving the Y-axis moving component 22 to bring the motor shaft 201 of the motor under test 200 closer to the other end of the first cross coupling 13. The first cross coupling 13 is then fixed manually.

[0069] In this application, when the motor under test 200 is directly driven to rotate by a driver to test its performance, the driver may generate electromagnetic interference to the measuring component 12, affecting the accuracy of the test results. This application can also perform the test by driving the reference axis 11. (See also...) Figure 1 As shown, the dynamometer mechanism 10 also includes a rotary drive 14, which is mounted on the base 16 and connected to the reference shaft 22. The rotary drive 14 can be a motor, which drives the reference shaft 22 to rotate around its own axis, thereby synchronously driving the motor shaft 201 of the motor under test 200 connected to the reference shaft 11 to rotate, so as to test the performance of the motor under test 200 through the measuring component 12.

[0070] In this embodiment, the dynamometer mechanism 10 further includes a second cross coupling 15, and the rotary drive 14 is connected to the reference shaft 11 through the second cross coupling 15.

[0071] In this application, for different sizes of the motor under test 200, it is necessary to adjust the distance between the reference shaft 11 and the fixture 24 to facilitate the connection between the reference shaft 11 and the motor shaft 201 of the motor under test 200 clamped on the fixture 24. See [link to relevant documentation]. Figure 1 As shown, the dynamometer mechanism 10 also includes a slide rail 161, which is mounted on the worktable 50. The bottom of the measuring component 12 is provided with a groove 171 that mates with the slide rail 161. The distance between the reference shaft 11 connected to the measuring component 12 and the motor shaft 201 of the motor under test 200 held by the fixture 24 is adjusted by the sliding engagement of the groove 171 and the slide rail 161.

[0072] In this embodiment, the measuring component 12 is mounted on the slider 17, the slide groove 171 is disposed at the bottom of the slider 17, and the slide rail 161 is mounted on the base 16. The slider 17 can synchronously drive the measuring component 12 to move through the sliding engagement of the slide groove 171 and the slide rail 161, thereby adjusting the distance between the reference shaft 11 connected to the measuring component 12 and the motor shaft 201 of the motor under test 200 held by the fixture 24. The slide rail 51 is arranged along the Y-axis direction, which allows the slider 17 to drive the reference shaft 11 connected to the measuring component 12 to move toward the motor shaft 201 of the motor under test 200 held by the fixture 24. After the slider 17 moves into place, it can be locked (for example, by fixing and locking the slider 17 to the base 16 with bolts), thereby adjusting the distance between the reference shaft 11 and the motor shaft 201 of the motor under test 200 held by the fixture 24.

[0073] In this application, the X-axis moving component 21 and the Y-axis moving component 22 have the same structure, see [link]. Figure 6 As shown, the X-axis moving assembly 21 includes an X-axis drive motor 211, an X-axis moving slider 212, and an X-axis mounting bracket 213. The X-axis moving slider 212 is reciprocally slidably mounted on the X-axis mounting bracket 213 along the X-axis direction. The X-axis drive motor 211 is fixed on the X-axis mounting bracket 213 and is connected to the X-axis moving slider 212 via a transmission connection (e.g., via a lead screw). The X-axis drive motor 211 can output rotational motion in both forward and reverse directions. The X-axis moving slider 212 can convert the rotational motion of the X-axis drive motor 211 in both forward and reverse directions into linear motion of reciprocating sliding along the forward and reverse X-axis directions. The Y-axis moving assembly 22 includes a Y-axis drive motor 221, a Y-axis moving slider 222, and a Y-axis mounting bracket 223. The Y-axis mounting bracket 223 is fixed on the X-axis moving slider 212. The Y-axis moving slider 212 is reciprocally slidably mounted on the Y-axis mounting bracket 223 along the Y-axis direction. The Y-axis drive motor 221 is fixed on the Y-axis mounting bracket 223 and is connected to the Y-axis moving slider 222 via a transmission connection (e.g., via a lead screw). The Y-axis drive motor 221 can output rotational motion in both forward and reverse directions. The Y-axis moving slider 222 can convert the rotational motion of the Y-axis drive motor 221 in both forward and reverse directions into linear motion of reciprocating sliding along the forward and reverse directions of the Y-axis.

[0074] The control module is electrically connected to the X-axis drive motor 211 and the Y-axis drive motor 221. By controlling the output torque of the X-axis drive motor 211, the control module can control the displacement of the X-axis moving slider 212 in the positive and negative X-axis directions. This displacement can be determined according to the X-axis offset Lx. By controlling the output torque of the Y-axis drive motor 221, the control module can control the displacement of the Y-axis moving slider 222 in the positive and negative Y-axis directions. This displacement can be determined according to the Y-axis offset Ly.

[0075] It should be understood that the displacement of the X-axis moving slider 212 along the positive and negative X-axis directions and the displacement of the Y-axis moving slider 222 along the positive and negative Y-axis directions are also related to the pitch of the lead screw. The output torque of the X-axis drive motor 211 and the Y-axis drive motor 221 can be determined according to actual needs.

[0076] See Figure 7 As shown, the Z-axis moving assembly 23 includes a Z-axis drive motor 231, a Z-axis guide slider 232, a Z-axis guide rail 233, a Z-axis lead screw 234, a Z-axis moving slider 235, a Z-axis mounting bracket 236, and a Z-axis connecting bracket 237. The Z-axis mounting bracket 236 is fixedly connected to the Y-axis mounting bracket 223. Two Z-axis guide rails 233 are provided, and the two Z-axis guide rails 233 are installed alternately on the Z-axis mounting bracket 236. Each Z-axis guide rail 233 is provided with at least one Z-axis guide slider 232. The Z-axis guide rails 233 are arranged along the Z-axis direction, so that the Z-axis guide sliders 232 installed on each Z-axis guide rail 233 can slide back and forth in the positive and negative directions of the Z-axis. The Z-axis connecting bracket 237 is fixed to the Z-axis guide slider 232 of each Z-axis guide rail 233. The Z-axis lead screw 234 is also fixed along the Z-axis direction to the Z-axis mounting bracket 236 and is located between the two Z-axis guide rails 233. The Z-axis moving slider 235 is screwed onto the Z-axis lead screw 234, and the Z-axis moving slider 235 is fixedly connected to the Z-axis connecting bracket 237, thus fixing the fixture to the Z-axis connecting bracket 237. The Z-axis drive motor 231 is mounted on the Z-axis mounting bracket 236 and connected to the Z-axis lead screw 234.

[0077] Z-axis drive motor 231 can output rotational motion in both directions to drive Z-axis lead screw 234 to move synchronously. Z-axis moving slider 235 can convert the rotational motion of Z-axis lead screw 234 in both directions into linear motion of reciprocating sliding along the axial direction of Z-axis lead screw 234, thereby driving Z-axis connecting frame 237 to reciprocate sliding along the Z-axis in both directions. During the sliding process, Z-axis guide slider 232 slides synchronously along Z-axis guide rail 233 to guide the linear motion of Z-axis connecting frame 237 reciprocating sliding along the Z-axis in both directions.

[0078] Similarly, the control module is electrically connected to the Z-axis drive motor 231. By controlling the output torque of the Z-axis drive motor 231, the control module can control the displacement of the Z-axis moving slider 235 in the linear motion along the positive and negative Z-axis directions. This displacement can be determined based on the Z-axis offset Lz. The displacement of the Z-axis moving slider 235 in the linear motion along the positive and negative Z-axis directions is also related to the pitch of the Z-axis lead screw 234, which can also be determined according to actual needs based on the output torque of the Z-axis drive motor 231.

[0079] In the above embodiments, the Z-axis moving component 23 can also adopt the structure of the X-axis moving component 21 and the Y-axis moving component 22, or the X-axis moving component 21 and the Y-axis moving component 22 can also adopt the structure of the Z-axis moving component 23, and there is no specific limitation.

[0080] See Figure 1 and Figure 5 As shown, the scanning mechanism 30 includes a support 32, and the three-dimensional scanning module 31 consists of at least two image acquisition modules 311 mounted on the support 32. The at least two image acquisition modules 311 are mounted on the support 32 at intervals, and the at least two image acquisition modules 311 are respectively directed from different directions toward the reference axis 11 and the motor shaft 201 of the motor under test 200 held on the fixture 24. In a preferred embodiment, the scanning directions of the at least two image acquisition modules 311 are perpendicular to each other. Thus, by cooperating with all the image acquisition modules 311, three-dimensional point cloud data of the motor shaft 201 of the motor under test 200 and the reference axis 11 can be acquired.

[0081] In this embodiment, two image acquisition modules 311 are provided. The two image acquisition modules 311 acquire three-dimensional point cloud data from the motor shaft 201 and the reference axis 11 of the measuring motor 200 from the top view direction and the side view direction, respectively. The image acquisition modules 311 are usually industrial cameras (Basler acA24-35um, resolution 2448×2048).

[0082] See Figure 8 and Figure 9 As shown, the clamp 24 includes a body 241, a rotating member 242, a driving member 243, and a gripper 244. The body 241 and the gripper 244 are slidably connected. The body 241 has an inner cavity 2411. The rotating member 242 is rotatably mounted in the inner cavity 2411. The gripper 244 has multiple teeth 2441. One end of the rotating member 242 has a helical groove 2421 that engages with the multiple teeth 2441. The other end of the rotating member 242 is connected to the driving member 243. The driving member 243 is mounted on the body 241. The rotating member 242 is used to rotate in response to the driving member 243. The rotating member 242 is used to adjust the clamping space size of the gripper 244 by rotation, so as to clamp or release the motor 200 under test.

[0083] In this embodiment, the gripper 244 is provided with at least three gripper units, and the body 241 is also provided with at least three slides 2413. The at least three gripper units are slidably installed in the at least three slides 2413. The driving member 243 drives the rotating member 242 to rotate. The rotating member 242 can drive the at least three gripper units to move closer to each other or separate from each other through the cooperation of the spiral groove 2421 and multiple teeth 2441, so as to clamp or release the motor 200 under test.

[0084] The driving member 243 drives the rotating member 242 to rotate around its own axis in a first rotation direction. The rotating member 242, rotating in the first rotation direction, causes at least three grippers 244 to move closer together through the engagement of the helical groove 2421 and multiple teeth 2441, so as to clamp the motor 200 under test. The driving member 243 drives the rotating member 242 to rotate around its own axis in a second rotation direction. The rotating member 242, rotating in the second rotation direction, causes at least three grippers 244 to separate from each other through the engagement of the helical groove 2421 and multiple teeth 2441, so as to release the motor 200 under test.

[0085] In one embodiment of this application, the driving component 243 includes a motor 2431, which is fixed to the body 241 and its output shaft is fixedly connected to the rotating component 242. The rotating component 242 is driven to rotate through the output shaft of the motor 2431.

[0086] In another embodiment of this application, the driving member 243 further includes an adjustment knob, which includes an adjustment part 245 and a first gear part 2432 fixedly connected. The side wall of the body 241 is provided with a mounting hole 2412. The fixedly connected adjustment part 245 and the first gear part 2432 are rotatably mounted in the mounting hole 2412. The outer side of the adjustment part 245 is provided with an operating part that cooperates with an operating tool, so as to drive the adjustment knob to rotate by the operating tool. The rotating member 242 is provided with a second gear part (not shown in the figure) that meshes with the first gear part 2432. The first gear part 2432 and the second gear part preferably adopt a bevel gear meshing relationship, so that the adjustment knob can drive the rotating member 242 to rotate through the meshing cooperation of the first gear part 2432 and the second gear part.

[0087] In summary, the motor testing device provided in this application has a three-dimensional scanning module that can accurately and quickly acquire three-dimensional point cloud data of the motor shaft and reference axis of the motor under test. The control module calculates the offset of the motor shaft of the motor under test relative to the reference axis in the three-dimensional direction based on the three-dimensional point cloud data, thereby realizing the adjustment in the three-dimensional direction, improving the coaxiality of the motor shaft of the motor under test and the reference axis of the dynamometer, and improving the testing accuracy.

[0088] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A motor testing device, characterized in that, It includes a control module, a workbench, and a dynamometer, an adjustment mechanism to be tested, and a scanning mechanism disposed on the workbench; The dynamometer mechanism includes a reference shaft and a measuring component. The measuring component is connected to the reference shaft, and the reference shaft is used to connect to the motor shaft of the motor under test. The adjustment mechanism under test includes a three-dimensional adjustment component and a clamp mounted on the three-dimensional adjustment component. The clamp is used to hold the motor under test, and the three-dimensional adjustment component is used to drive the clamp to move in the X-axis, Y-axis or Z-axis direction. The scanning mechanism includes a three-dimensional scanning module, the scanning direction of which is toward the reference axis and the motor shaft of the motor under test, and is used to collect three-dimensional point cloud data of the reference axis and the motor shaft of the motor under test; The input terminal of the control module is electrically connected to the three-dimensional scanning module, and the output terminal of the control module is electrically connected to the three-dimensional adjustment component. The control module is used to calculate the X-axis offset, Y-axis offset, and Z-axis offset of the motor shaft of the motor under test relative to the reference axis based on the three-dimensional point cloud data, and to control the three-dimensional adjustment component according to the X-axis offset, the Y-axis offset, and the Z-axis offset, respectively.

2. The motor testing device as described in claim 1, characterized in that, The scanning mechanism also includes a support frame, and the three-dimensional scanning module consists of at least two image acquisition modules mounted on the support frame, with the scanning directions of the at least two image acquisition modules being perpendicular to each other.

3. The motor testing device as described in claim 1, characterized in that, The three-dimensional adjustment component includes an X-axis movement component, a Y-axis movement component, and a Z-axis movement component. The X-axis movement component is mounted on the worktable, the Y-axis movement component is mounted on the X-axis movement component, the Z-axis movement component is mounted on the Y-axis movement component, and the fixture is mounted on the Z-axis movement component.

4. The motor testing device as described in any one of claims 1-3, characterized in that, The clamp includes a body, a rotating component, a driving component, and a gripper. The body and the gripper are slidably connected. The body has an inner cavity, and the rotating component is disposed in the inner cavity. The gripper has multiple teeth. One end of the rotating component has a helical groove that engages with the multiple teeth, which is used to adjust the size of the gripping space of the gripper by rotation. The other end of the rotating component is connected to the driving component and is used to rotate in response to the driving component.

5. The motor testing device as described in claim 4, characterized in that, The driving component includes a motor, which is fixed to the body and its output shaft is fixedly connected to the rotating component. And / or, The driving component includes an adjustment knob, which includes an adjustment part and a first gear part fixedly connected; the side wall of the main body is provided with a mounting hole, the adjustment part is rotatably mounted in the mounting hole and the outer side of the adjustment part is provided with an operating part that cooperates with the operating tool, and the rotating component is provided with a second gear part that meshes with the first gear part.

6. The motor testing device as described in claim 1, characterized in that, The adjustment mechanism under test also includes a driver, which is used to drive the motor under test to rotate.

7. The motor testing device as described in claim 1, characterized in that, The dynamometer mechanism also includes a first cross coupling, which is used to connect the reference shaft to the motor shaft of the motor under test.

8. The motor testing device as described in claim 1, characterized in that, The dynamometer mechanism also includes a rotary drive component connected to the reference shaft, which drives the motor under test to rotate via the reference shaft.

9. The motor testing device as described in claim 8, characterized in that, The dynamometer mechanism also includes a second cross coupling, through which the rotary drive component is connected to the reference shaft.

10. The motor testing device as described in claim 1, characterized in that, The dynamometer mechanism also includes a slide rail disposed on the worktable. The bottom of the measuring component is provided with a slide groove that cooperates with the slide rail. The distance between the reference axis connected to the measuring component and the fixture is adjusted by the cooperation between the slide groove and the slide rail.

Images