Motor testing device

Abstract

The utility model provides a kind of motor testing device, including bearing structure, bearing structure is used to bear motor;Load structure, detachably set on bearing structure, and with the output shaft of motor is connected;Torque sensor, be located on bearing structure, to detect the torque value of load structure;Angular acceleration sensor, be located on bearing structure, to detect the angular acceleration value of load structure;Speed sensor, be located on bearing structure, to detect the speed of load structure;Position sensor, be located on bearing structure, to detect the position of load structure;Control unit, with torque sensor, angular acceleration sensor, speed sensor and position sensor are all connected.Solved the problem that motor selected by theoretical calculation in the prior art does not match actual load.

Description

Technical Field

[0001] This utility model relates to the field of motor testing technology, and more specifically, to a motor testing device. Background Technology

[0002] In modern industrial automation, the efficiency of the motor drive system is directly related to the operating efficiency and precision of the equipment. In existing technologies, when selecting a motor, theoretical calculations are first performed to clarify the load characteristics (load type, size, and motion parameters). Then, a matching motor model is selected based on these load characteristics to achieve a motor that meets the requirements of rated power, torque, speed, and inertia. Finally, the environmental and constraint conditions are determined in conjunction with the actual application scenario to select the final motor. However, the motor type determined by these theoretical calculations often does not match the actual load. Utility Model Content

[0003] The main objective of this invention is to provide a motor testing device to solve the problem in the prior art where the motor selected through theoretical calculations does not match the actual load.

[0004] To achieve the above objectives, according to one aspect of the present invention, a motor testing device is provided, comprising:

[0005] The load-bearing structure is used to support the motor.

[0006] The load structure is detachably mounted on the load-bearing structure and connected to the output shaft of the motor;

[0007] A torque sensor is mounted on the load-bearing structure to detect the torque value of the load structure;

[0008] An angular acceleration sensor is installed on the load-bearing structure to detect the angular acceleration value of the load structure;

[0009] A speed sensor is mounted on the load-bearing structure to detect the speed of the load structure;

[0010] A position sensor is installed on the load-bearing structure to detect the position of the load structure;

[0011] The control unit is connected to the torque sensor, angular acceleration sensor, speed sensor, and position sensor.

[0012] Furthermore, the load-bearing structure includes: a load-bearing component, the load-bearing component having a load-bearing surface;

[0013] At least two support members are provided on the bearing surface; the two ends of the load structure are rotatably connected to the relatively close side of the at least two support members, and a rotation space for the load structure to rotate is formed between the load structure and at least part of the bearing surface.

[0014] Furthermore, the load-bearing structure also includes: a first support structure disposed on the load-bearing surface, having a first support surface, and the motor disposed on the first support surface.

[0015] Furthermore, the first support structure includes: a first base plate disposed on the bearing surface, two first support plates disposed on the side of the first base plate away from the bearing surface, and a base disposed at the end of the two first support plates away from the first base plate, the base having a first support surface.

[0016] Furthermore, the load-bearing structure also includes a second support structure, which is disposed on the load-bearing surface and has a second support surface, and the torque sensor is disposed on the second support surface.

[0017] Furthermore, the second support structure includes: a second base plate disposed on the bearing surface, two second support plates disposed on the side of the second base plate away from the bearing surface, a top plate disposed at the end of the two second support plates away from the second base plate, and the top plate seat having a second support surface.

[0018] Furthermore, the motor testing device also includes a transmission component, located between the torque sensor and the motor, wherein the power output end of the transmission component passes through the torque sensor and is connected to the input end of the load structure to transmit the power generated by the motor to the load structure.

[0019] Furthermore, the load structure includes at least two rotating parts, which are rotatably mounted on at least two corresponding support parts;

[0020] Multiple connecting posts are detachably disposed between at least two rotating parts;

[0021] The angular acceleration sensor is mounted on one of the at least two rotating components.

[0022] Furthermore, at least two rotating components are annular, and each rotating component has a first rotating hole in the middle.

[0023] Each supporting component is provided with a second rotating hole, and each first rotating hole is provided in a one-to-one correspondence with each second rotating hole;

[0024] The motor testing device also includes a connecting component. One end of the connecting component is fixedly connected to the first rotating hole, and the other end of the connecting component is rotatably connected to the second rotating hole, so as to connect the support component and the corresponding rotating component through the connecting component.

[0025] Furthermore, the motor testing device also includes: a receiving structure disposed on the side of one of the supporting components away from the other supporting component, the receiving structure having a receiving cavity;

[0026] The speed sensor and position sensor are located between the housing structure and the supporting component, and the housing cavity is used to house the cables of the speed sensor and position sensor.

[0027] By applying the technical solution of this invention, through a unique modular design and a precise sensing system, accurate measurement of the dynamic performance of a motor under different load conditions is achieved. Specifically, the detachable load structure can simulate diverse inertial loads, allowing testers to specifically evaluate the motor's torque output characteristics, angular acceleration response, speed stability, and position control accuracy under light to heavy load conditions. The integrated control unit not only enables real-time acquisition and processing of data from various sensors but also provides a comprehensive analysis platform for the performance of the motor, controller, and control software. This design greatly improves testing efficiency, reduces development costs and time wasted due to improper matching of motor and load inertia, and also provides data support for the optimization and improvement of the motor drive system, ensuring its high reliability and high performance. In summary, this device fills the gap in the accuracy and flexibility of existing motor testing technologies, providing a powerful testing tool for the development of motor drive technology. Attached Figure Description

[0028] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0029] Figure 1 This is a schematic diagram of the motor testing device according to an embodiment of the present application from a first perspective.

[0030] Figure 2 This illustration shows a second-view structural schematic diagram of the motor testing device according to an embodiment of this application;

[0031] Figure 3 An exploded view of a motor testing apparatus according to an embodiment of this application is shown.

[0032] The above figures include the following reference numerals:

[0033] 1. Load-bearing structure; 11. Load-bearing component; 12. Support component; 13. First support structure; 131. First base plate; 132. First support plate; 133. Base; 14. Second support structure; 141. Second base plate; 142. Second support plate;

[0034] 2. Motor; 3. Load structure; 31. Rotating parts; 32. Connecting column;

[0035] 4. Torque sensor; 5. Angular acceleration sensor; 6. Speed ​​sensor; 7. Position sensor; 8. Transmission components; 9. Housing structure. Detailed Implementation

[0036] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] As mentioned in the background section, the technical objective of this application is to provide a motor testing device, including a support structure 1 for supporting a motor 2.

[0038] The load structure 3 is detachably mounted on the bearing structure 1 and connected to the output shaft of the motor 2;

[0039] Torque sensor 4 is mounted on the load-bearing structure 1 to detect the torque value of the load structure 3;

[0040] An angular acceleration sensor 5 is mounted on the load-bearing structure 1 to detect the angular acceleration value of the load structure 3.

[0041] Speed ​​sensor 6 is mounted on the load-bearing structure 1 to detect the speed of the load structure 3;

[0042] Position sensor 7 is mounted on the support structure 1 to detect the position of the load structure 3;

[0043] The control unit is connected to torque sensor 4, angular acceleration sensor 5, speed sensor 6 and position sensor 7.

[0044] This application provides a motor testing device, such as... Figures 1 to 3 As shown, by using the load-bearing structure 1 as the foundation of the entire test platform, not only can the motor 2 be stably supported, but the load structure 3 on it also provides the motor with a variable load environment that can simulate actual dynamic conditions. The detachable design of the load structure 3 means that loads of different masses or geometries can be easily replaced, thereby simulating various inertial load conditions encountered by the motor 2 in different application scenarios, increasing the diversity and realism of the test.

[0045] The torque sensor 4, angular acceleration sensor 5, speed sensor 6, and position sensor 7 in the motor testing device are responsible for real-time detection of torque, angular acceleration, speed, and position changes on the load structure 3, respectively. The data from these sensors is transmitted to the control unit in real time. Based on the received signals, the control unit analyzes the response characteristics of the motor 2 to commands under different load conditions. Specifically:

[0046] The real-time torque readings of torque sensor 4 can help the tester accurately grasp the changing trend of the output torque of motor 2, which is crucial for evaluating the driving force of motor 2 under high load.

[0047] The readings of the angular acceleration sensor 5 reveal the dynamic response of the motor 2 during acceleration and deceleration. In particular, under load conditions with large inertia, the transient angular acceleration performance of the motor 2 directly affects the system stability.

[0048] Speed ​​sensor 6 and position sensor 7 work together to monitor the speed stability and position control accuracy of motor 2, which is especially important for high-precision servo control systems. They can reveal the position tracking capability and speed consistency of motor 2 under continuous dynamic conditions.

[0049] The control unit's comprehensive analysis capabilities, by receiving and processing real-time data from the aforementioned sensors, can evaluate the performance parameters of motor 2, such as maximum torque, angular acceleration response time, speed fluctuation rate, and position deviation, thereby enabling the selection of a motor that better matches actual needs.

[0050] Furthermore, the load-bearing structure 1 includes: a load-bearing component 11, the load-bearing component 11 having a load-bearing surface;

[0051] At least two support members 12 are provided on the bearing surface; the two ends of the load structure 3 are rotatably connected to the relatively close side of the at least two support members 12, and a rotation space for the load structure 3 to rotate is formed between the load structure 3 and at least part of the bearing surface.

[0052] The motor testing device of this application adopts a design combining a load-bearing component 11 with at least two supporting components 12. This not only enhances the overall stability and load-bearing capacity of the motor testing device, but also provides the necessary support and space for the free rotation of the load structure 3, thereby ensuring the accuracy and reliability of the test.

[0053] The bearing surface of the bearing component 11 provides a solid platform for the motor 2 and the load structure 3. This ensures that when the motor 2 drives the load structure 3 to rotate, the entire device will not be displaced or tilted due to external vibration or uneven internal torque, thus maintaining the stability of the test environment. This is a prerequisite for obtaining accurate test data.

[0054] The presence of at least two support components 12 creates stable fulcrums. The load structure 3 is rotatably connected to these support components 12, meaning that the load structure 3 can rotate freely within a clearly defined space without being affected by unexpected friction or resistance. This design ensures that the signals measured by the torque, angular acceleration, speed, and position sensors accurately reflect the actual state of the load structure 3, without being distorted by structural instability or mechanical interference.

[0055] Furthermore, the load-bearing structure 1 also includes: a first support structure 13, which is disposed on the load-bearing surface and has a first support surface, and the motor 2 is disposed on the first support surface.

[0056] Furthermore, the first support structure 13 includes: a first base plate 131 disposed on the bearing surface, two first support plates 132 disposed on the side of the first base plate 131 away from the bearing surface, and a base 133 disposed at the end of the two first support plates 132 away from the first base plate 131, the base 133 having a first support surface.

[0057] The combination of the first base plate 131 and the bearing surface enhances the overall vibration resistance by increasing the contact area, and reduces the risk of structural deformation or displacement caused by inertial forces under high load conditions, thereby ensuring the coaxiality and rotational stability of the connection between the motor output shaft and the load structure 3.

[0058] The two first support plates 132 and the base 133 together form the mounting platform for the motor 2, with the base 133 providing the first support surface for stably supporting the motor 2. This double support plate structure design ensures the vertical stability and horizontal positioning accuracy of the motor 2, avoids axial displacement caused by vibration or thermal expansion during operation, ensures accurate readings from the torque sensor, angular acceleration sensor, speed sensor, and position sensor, and thus improves the reliability of the test results.

[0059] The integration of the first support structure 13 with the motor 2 not only simplifies the installation process of the motor 2 but also provides flexible adjustment space. The tester can easily switch the installation position and angle of the motor 2 between different test conditions to adapt to different specifications of the motor 2 and the requirements of the load structure. This greatly enhances the adaptability of the device and the flexibility of the test, and reduces the test cycle delay and cost increase caused by equipment adjustment.

[0060] The precise alignment of the motor 2 with the first support structure 13 helps the control unit to more effectively receive and analyze real-time data from the torque sensor 4, angular acceleration sensor 5, speed sensor 6 and position sensor 7.

[0061] Furthermore, the load-bearing structure 1 also includes a second support structure 14, which is disposed on the load-bearing surface and has a second support surface, and the torque sensor 4 is disposed on the second support surface.

[0062] Furthermore, the second support structure 14 includes: a second base plate disposed on the bearing surface, two second support plates 142 disposed on the side of the second base plate 141 away from the bearing surface, and a top plate disposed at the end of the two second support plates 142 away from the second base plate 141, the top plate seat having a second support surface.

[0063] The precise positioning of the torque sensor 4 on the second support structure 14 ensures the rigidity and alignment of its connection with the output shaft of the motor 2 and the load structure 3. The second base plate 141 provides a stable foundation, while the design of the two second support plates 142 ensures the stability of the torque sensor 4 in the vertical direction and its positioning accuracy in the lateral direction. The top plate, as the final support surface, fits tightly with the torque sensor 4, reducing additional vibrations that may occur during testing and preventing non-axial forces from affecting the readings of the torque sensor 4, thereby improving the accuracy of the measurement results.

[0064] By mounting the torque sensor 4 on a separate second support structure 14, rather than directly near the motor 2 or load structure 3, this device reduces mechanical interference caused by factors such as motor 2 vibration, load structure 3 imbalance, or temperature changes, and avoids the impact of these interferences on torque measurement.

[0065] The combination of the second support structure 14 and the load-bearing structure 1 not only provides a stable support for the torque sensor 4, but also enhances the structural strength and impact resistance of the entire testing device. When testing the high-torque output motor 2, the motor 2 may generate a large reaction force on the load-bearing structure 1. The second support structure 14 reduces the pressure on the load-bearing structure 1 itself by dispersing and absorbing these forces, ensuring the stable operation of the device under extreme testing conditions.

[0066] Furthermore, the motor testing device also includes a transmission component 8, which is located between the torque sensor 4 and the motor 2. The power output end of the transmission component 8 passes through the torque sensor 4 and is connected to the input end of the load structure 3 to transmit the power generated by the motor 2 to the load structure 3.

[0067] The transmission component 8 ensures that the power generated by the motor 2 can be transmitted to the load structure 3 without loss or delay. The power output terminal passes through the torque sensor 4 and is directly connected to the input terminal of the load structure 3. This device eliminates the transmission loss and signal attenuation that may occur in traditional indirect connections, ensuring the integrity of the output torque of the motor 2 and the synchronization of the angular velocity, which is beneficial for obtaining the true performance data of the motor 2 under various load conditions.

[0068] The direct coupling between the transmission component 8 and the torque sensor 4 allows the torque sensor 4 to directly sense the torque changes on the power output shaft of the motor 2 without the need for secondary conversion or indirect calculation, thus avoiding measurement errors that may be introduced by intermediate steps. This design simplifies the torque measurement process, improves data acquisition efficiency, and also ensures the accuracy and reliability of the test results.

[0069] The precise connection between the transmission component 8 and the load structure 3 enables the load structure 3 to accurately respond to the power input of the motor 2 when simulating different working conditions. It can maintain good dynamic response characteristics whether in low-inertia small-amplitude vibration tests or in extreme cases simulating high-inertia large loads.

[0070] Furthermore, the load structure 3 includes at least two rotating parts 31, which are rotatably disposed on at least two corresponding support parts 12;

[0071] Multiple connecting posts 32 are detachably disposed between at least two rotating parts 31;

[0072] The angular acceleration sensor 5 is mounted on one of the at least two rotating components 31.

[0073] The annular rotating component 31 and the detachable connecting column 32 serve as inertia blocks, allowing testers to precisely adjust the total inertia of the load structure 3 by increasing or decreasing the number of connecting columns 32 and selecting connecting columns 32 of different masses according to different test requirements. This modular design strategy provides great flexibility and versatility for performance testing of the motor 2 under different inertia load conditions, and helps to comprehensively evaluate the dynamic response capability of the motor 2 in practical applications.

[0074] The arrangement of multiple rotating components 31 and connecting columns 32 ensures the stability of the load structure 3 when rotating at high speeds or subjected to large torques. By directly mounting the angular acceleration sensor 5 on one of the rotating components 31, the distance between the sensor and the actual rotating load is reduced, which helps to improve the accuracy and response speed of angular acceleration measurement and reduce measurement errors and delays.

[0075] Since the connecting column 32 acts as an inertia block, the tester can more accurately simulate the inertia characteristics of the target load, which is especially important for verifying the sensitivity of motor 2 to changes in inertia and the adaptability of the control algorithm.

[0076] The detachable nature of the connecting column 32 allows the tester to quickly adjust the inertia configuration of the load structure 3 without the need for a complex device disassembly and assembly process, which greatly shortens the test preparation time and improves the test efficiency.

[0077] The modular design of the rotating component 31 and connecting column 32 not only facilitates pre-test calibration but also simplifies post-test maintenance and cleaning, reducing maintenance costs and extending the service life of the device.

[0078] Furthermore, at least two rotating parts 31 are annular, and each rotating part 31 has a first rotating hole in the middle.

[0079] Each support component 12 is provided with a second rotating hole, and each first rotating hole is provided in a one-to-one correspondence with each second rotating hole;

[0080] The motor testing device also includes a connecting component. One end of the connecting component is fixedly connected to the first rotating hole, and the other end of the connecting component is rotatably connected to the second rotating hole, so as to connect the support component and the corresponding rotating component through the connecting component.

[0081] The annular rotating component 31, with its uniformly distributed mass characteristics, can more accurately simulate the dynamic response of the motor 2 when facing a ring-shaped or disc-shaped load. By providing a first rotating hole in the middle of the rotating component 31 and a corresponding second rotating hole on the support component 12, this design ensures that each rotating component 31 maintains good center alignment and balance on the support component.

[0082] One end of the connecting component is fixedly connected to the first rotating hole of the rotating component 31, and the other end is rotatably connected to the second rotating hole of the supporting component. This design not only provides a stable connection between the rotating component 31 and the supporting component 12, but also ensures the degree of freedom of the rotating component 31 during rotation and reduces unnecessary rotational resistance. In addition, the use of the connecting component can adapt to various installation conditions, and can maintain a reliable connection of the load structure 3 even in different test scenarios, thereby enhancing the environmental adaptability of the device and the stability of the test process.

[0083] By precisely aligning the first and second rotating holes, the design of this application reduces nonlinear torque fluctuations caused by eccentricity or installation errors during high-speed rotation or frequent start-stop processes, ensuring that all sensors can obtain accurate data.

[0084] Furthermore, the motor testing device also includes: a receiving structure 9, disposed on the side of one of the supporting members 12 away from the other supporting member 12, the receiving structure 9 having a receiving cavity;

[0085] The speed sensor 6 and the position sensor 7 are disposed between the housing structure 9 and the support member 12. The housing cavity is used to accommodate the cables of the speed sensor 6 and the position sensor 7. The housing structure 9 includes a housing body, a first connecting piece and a connecting post disposed outside the housing body. The housing body is disc-shaped. There are two first connecting pieces and two connecting posts. One end of the first connecting piece is connected to the housing structure 9, and the other end of the first connecting piece is connected to the connecting post. The end of the connecting post away from the first connecting piece is connected to the support member 12. The housing structure 9 and the support member 12 can be connected by welding.

[0086] The position sensor 7 is fixed to the support member 12 by a second connecting piece. The second connecting piece includes a first part and a second part. One end of the first part is connected to the position sensor 7, and the end of the first part away from the position sensor 7 is connected to the second part. The free end of the second part is used to connect to the support member 12. The extension directions of the first part and the second part are perpendicular. The second connecting piece ensures the stability of the connection between the position sensor 7 and the support member 12.

[0087] The housing structure 9, especially its housing cavity, provides a safe installation environment for the speed sensor 6 and position sensor 7, protecting them from direct external mechanical damage or harsh environmental factors. More importantly, the housing cavity is specifically designed for cable storage and management, preventing wear and short-circuit risks caused by sensor cables coming into contact with other mechanical components during testing. It also reduces signal interference that may be caused by messy cable arrangement, ensuring the integrity and accuracy of sensor signals.

[0088] By providing a housing structure 9 on one side of the support component 12, instead of allowing the sensor and cable to be randomly distributed in the test area, this application achieves effective integration and concealed storage of the sensor and its cable, reduces the space occupied by additional external components, and makes the overall layout of the test device more compact and orderly.

[0089] The convenient connection between the housing structure 9 and the supporting components simplifies the assembly and disassembly process of the speed sensor 6 and the position sensor 7. Test personnel can easily replace or maintain the sensors without making major modifications to the entire test platform, saving significant manpower and time costs and improving work efficiency.

[0090] The design of the housing structure 9 takes into account the heat dissipation requirements of the sensor. Its internal cavity can use airflow or a built-in cooling system to reduce the temperature of the sensor and cable under long-term operation or high-load conditions, avoiding sensor performance degradation or failure due to overheating, and ensuring the continuity of testing and the reliability of data.

[0091] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0092] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the structures and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0093] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each structure itself.

[0094] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0095] Furthermore, it should be noted that the use of terms such as "first" and "second" to define the zero structure is merely for the purpose of distinguishing the corresponding zero structures. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0096] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A motor testing device, characterized in that, include: The supporting structure (1) is used to support the motor (2). The load structure (3) is detachably mounted on the bearing structure (1) and connected to the output shaft of the motor (2); A torque sensor (4) is installed on the bearing structure (1) to detect the torque value of the load structure (3); An angular acceleration sensor (5) is installed on the bearing structure (1) to detect the angular acceleration value of the load structure (3); A speed sensor (6) is mounted on the bearing structure (1) to detect the speed of the load structure (3); A position sensor (7) is provided on the bearing structure (1) to detect the position of the load structure (3); The control unit is connected to the torque sensor (4), the angular acceleration sensor (5), the speed sensor (6), and the position sensor (7).

2. The motor testing device according to claim 1, characterized in that, The load-bearing structure (1) includes: A bearing component (11) having a bearing surface; At least two support members (12) are provided on the bearing surface; the two ends of the load structure (3) are rotatably connected to the relatively close side of the at least two support members (12) and form a rotation space between them and at least part of the bearing surface for the load structure (3) to rotate.

3. The motor testing device according to claim 2, characterized in that, The load-bearing structure (1) also includes: The first support structure (13) is provided on the bearing surface and has a first support surface, and the motor (2) is provided on the first support surface.

4. The motor testing device according to claim 3, characterized in that, The first support structure (13) includes: A first base plate (131) is disposed on the bearing surface. Two first support plates (132) are disposed on the side of the first base plate (131) away from the bearing surface. A base (133) is disposed at the end of the two first support plates (132) away from the first base plate (131). The base (133) has the first support surface.

5. The motor testing device according to claim 2, characterized in that, The load-bearing structure (1) further includes a second support structure (14), which is disposed on the load-bearing surface and has a second support surface. The torque sensor (4) is disposed on the second support surface.

6. The motor testing device according to claim 5, characterized in that, The second support structure (14) includes: A second base plate (141) is provided on the bearing surface. Two second support plates (142) are provided on the side of the second base plate (141) away from the bearing surface. A top plate is provided at the end of the two second support plates (142) away from the second base plate (141). The top plate has the second support surface.

7. The motor testing device according to claim 1, characterized in that, The motor testing device also includes: A transmission component (8) is disposed between the torque sensor (4) and the motor (2). The power output end of the transmission component (8) passes through the torque sensor (4) and is connected to the input end of the load structure (3) to transmit the power generated by the motor (2) to the load structure (3).

8. The motor testing device according to claim 2, characterized in that, The load structure (3) includes: At least two rotating parts (31) are rotatably mounted on at least two corresponding support parts (12); Multiple connecting posts (32) are detachably disposed between at least two of the rotating components (31); The angular acceleration sensor (5) is mounted on one of the at least two rotating components (31).

9. The motor testing device according to claim 8, characterized in that, At least two of the rotating components (31) are annular, and each of the rotating components (31) has a first rotating hole in the middle. Each of the support components (12) is provided with a second rotating hole, and each of the first rotating holes and each of the second rotating holes are provided in a one-to-one correspondence; The motor testing device further includes a connecting component, one end of which is fixedly connected to the first rotating hole, and the other end of which is rotatably connected to the second rotating hole, so as to connect the supporting component and the corresponding rotating component through the connecting component.

10. The motor testing device according to claim 2, characterized in that, The motor testing device also includes: A receiving structure (9) is provided on one of the supporting members (12) on the side away from the other supporting member (12), the receiving structure (9) having a receiving cavity; The speed sensor (6) and the position sensor (7) are disposed between the housing structure (9) and the support member (12), and the housing cavity is used to accommodate the cables of the speed sensor (6) and the position sensor (7).

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