Motor rotation testing machine

Abstract

The invention relates to the technical field of motor experiment equipment, provides a motor rotation testing machine, and aims to solve the problem that an existing device cannot collect motor characteristic parameters under an emergency braking working condition. According to the technical scheme, the device comprises a workbench, and the workbench is provided with a motor mounting frame, a first supporting frame, a rotation driving piece and an encoder; one end of the main shaft is connected with the output end of a motor to be tested, and the peripheral wall of the main shaft is provided with a brake gear ring; the brake rod is arranged on the workbench in a sliding mode and can move to abut against the brake gear ring so as to limit rotation of the main shaft. The rotation driving piece is connected with the other end of the spindle through a transmission mechanism to drive the spindle to rotate; the detection end of the encoder is in transmission connection with the spindle for outputting pulse signals; the controller is electrically connected with the encoder, receives the pulse signal and generates the spindle rotating speed. According to the scheme, steady-state rotation and emergency braking working condition simulation and rotating speed parameter acquisition can be realized, and the structure is compact.

Description

Technical Field

[0001] This invention relates to the field of motor testing equipment technology, specifically to a motor rotation testing machine. Background Technology

[0002] In existing technologies, the main function of motor rotation testing devices is to simulate the operating state of a motor under normal steady-state rotation conditions by collecting basic parameters such as motor speed, torque, and current through sensors. The core structure of existing testing devices typically includes a drive unit, a load unit, sensor components, and a data acquisition module. The drive unit drives the motor to operate at a set steady-state speed, the load unit provides load resistance simulating actual operation, and the sensor components are installed at locations such as the motor output shaft and circuit loops to achieve real-time acquisition of steady-state parameters. Finally, the data acquisition module summarizes and processes the parameters and outputs the test results.

[0003] However, existing motor testing devices have significant technical defects in practical applications, making it difficult to meet the requirements for collecting motor characteristic parameters under emergency braking conditions. The mechanical structure design of existing devices is adapted to steady-state operation scenarios and lacks a rapid response mechanism for emergency braking. When it is necessary to simulate emergency braking conditions, it is impossible to achieve instantaneous load loading or rapid transmission of braking commands, resulting in a large deviation between the braking process and the actual operating conditions. The collected parameters lack authenticity and reference value, and cannot comprehensively evaluate the performance of the motor under extreme operating conditions. Summary of the Invention

[0004] To overcome the above-mentioned defects, embodiments of the present invention provide a motor rotation testing machine, which solves the technical problem in the related art that motor testing devices can only realize the detection of performance parameters during the steady-state rotation of the motor, and cannot collect motor characteristic parameters under emergency braking conditions.

[0005] At least one embodiment of the present invention provides a motor rotation testing machine, comprising: Workbench; A motor mounting bracket, located on the workbench, is used to mount the motor to be tested; A first support frame is provided on the workbench. A main shaft is rotatably mounted on the first support frame. One end of the main shaft is used to connect to the output end of the motor under test. A brake gear ring is provided on the outer peripheral wall of the main shaft. A brake lever is slidably mounted on the worktable. The brake lever can move towards the side closer to the spindle axis to abut against the brake gear ring to limit the rotation of the spindle. A rotation drive is provided on the worktable. The output end of the rotation drive is connected to the other end of the main shaft through a transmission mechanism, and is used to drive the main shaft to rotate. An encoder is mounted on the worktable, and the detection end of the encoder is connected to the main shaft drive. The encoder is used to receive the pulse signal output when the main shaft rotates. The controller, electrically connected to the encoder, is used to receive the pulse signal and generate the rotational speed of the spindle based on the pulse signal.

[0006] According to one embodiment of this application, the workbench is provided with a second support frame; the transmission mechanism includes a first synchronous wheel located at the output end of the rotary drive member, and a transmission shaft rotatably mounted on the second support frame. The transmission shaft is provided with a second synchronous wheel. The first synchronous wheel and the second synchronous wheel are driven together by a synchronous belt. One end of the transmission shaft is connected to one end of the main shaft for driving the main shaft to rotate under the action of the rotary drive member.

[0007] According to one embodiment of this application, the end of the drive shaft is connected to the end of the main shaft via a torque limiter.

[0008] According to one embodiment of this application, the worktable is provided with a sliding drive component, and the brake rod is provided on the drive end of the sliding drive component. The sliding drive component can drive the brake rod to move towards the spindle axis until it abuts against the brake gear ring to brake the spindle.

[0009] According to one embodiment of this application, the brake lever is vertically oscillatingly connected to the drive end. The drive end is provided with a buffer elastic element, and both ends of the buffer elastic element abut against the drive end and the brake lever, respectively. The buffer elastic element is used to provide the brake lever with a oscillating force to rotate toward the brake gear ring, so as to brake the main shaft through the brake lever.

[0010] According to one embodiment of this application, an adjusting screw is threadedly connected to the drive end, one end of the adjusting screw abuts against the buffer elastic element, and the adjusting screw can move up and down and tension or compress the buffer elastic element to adjust the swing force of the buffer elastic element acting on the brake rod.

[0011] According to one embodiment of this application, the bottom surface of the drive end is provided with a slot; the workbench is provided with a mounting base; the drive end is slidably disposed on the top of the mounting base, the mounting base is provided with an upward-facing sliding hole, and a plug rod is slidably connected in the sliding hole; When the drive end slides to the point where the slot and the sliding hole are connected, the insertion rod can slide and engage with the slot to limit the position of the drive end relative to the mounting base.

[0012] According to one embodiment of this application, a push elastic member is provided in the sliding hole. The two ends of the push elastic member are respectively connected to the insertion rod and the bottom wall of the sliding hole, and are used to provide a force for the insertion rod to slide upward and approach the slot.

[0013] According to one embodiment of this application, the inner peripheral wall of the sliding hole is provided with a first annular platform, the outer periphery of the insertion rod has a second step and a first step located above the second step, and the first annular platform can abut against the first step to limit the sliding range of the insertion rod; A chamber is formed between the outer periphery of the insertion rod and the inner wall of the sliding hole, located above the second step. The chamber is connected to an external high-pressure gas source through a pipeline, and an electromagnetic reversing valve is provided on the pipeline.

[0014] According to one embodiment of this application, the workbench is provided with a clamping telescopic member, the telescopic end of the clamping telescopic member faces the motor mounting bracket, and the clamping telescopic member is used to extend outward and press the motor to be tested onto the motor mounting bracket.

[0015] The present invention provides a motor rotation testing machine, which, compared with the prior art, provides a stable mounting base for each component through the workbench, ensuring the overall structural stability; the motor mounting frame cooperates with the first support frame to ensure the coaxiality of the motor under test and the main shaft, reducing power transmission deviation.

[0016] The brake gear ring, in conjunction with the sliding brake lever, enables rapid spindle braking, overcoming the shortcomings of existing devices that cannot adapt to emergency braking conditions and ensuring consistency between the braking process and actual operating conditions. The encoder, connected to the spindle drive and combined with the controller, can collect and generate speed parameters in real time, achieving accurate parameter acquisition under steady-state rotation and emergency braking conditions. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a motor rotation testing machine provided in an embodiment of the present invention; Figure 2 This is an embodiment of the present invention. Figure 1 A cross-sectional schematic diagram of the internal structure of the Zhongdian Motor Rotary Testing Machine; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 for Figure 2 Enlarged view of section B in the middle.

[0019] In the diagram: 100. Motor under test; 1. Workbench; 11. Motor mounting bracket; 12. First support frame; 2. Main shaft; 21. Brake gear ring; 3. Brake lever; 4. Rotary drive component; 5. Encoder; 13. Second support frame; 41. First synchronous pulley; 42. Drive shaft; 43. Second synchronous pulley; 6. Torque limiter; 7. Sliding drive component; 71. Drive end; 72. Buffer elastic component; 73. Adjusting screw; 711. Slot; 14. Mounting base; 141. Sliding hole; 15. Insert rod; 16. Pushing elastic component; 142. First ring platform; 151. First step; 152. Second step; 153. Chamber; 17. Tightening telescopic component. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0021] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0022] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and 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. Therefore, they should not be construed as limitations on this application.

[0023] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in a sequence other than those illustrated or described herein.

[0024] To make the drawings concise and easy to understand, some drawings only show one of the components with the same structure or function, or only one of them is marked. In this article, "one" not only means "only one", but can also mean "more than one", and "several" includes "two" and "more than two".

[0025] Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus. It is understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. The embodiments of this application are described in detail below with reference to the accompanying drawings.

[0026] Motor rotation performance is one of the core performance indicators of a motor. Motor rotation testing machines, as key equipment in motor R&D, production, and quality inspection, are widely used in industrial drive motors, automotive drive motors, and household appliance motors. By simulating actual motor operating conditions, they collect core parameters such as speed and torque, providing data support for motor performance evaluation, fault diagnosis, and structural optimization. In practical motor applications, in addition to conventional steady-state rotation conditions, performance under emergency braking conditions directly affects the operational safety of the equipment. Therefore, there is an urgent need for testing equipment that can accurately simulate emergency braking conditions.

[0027] like Figure 1 As shown, the motor rotation testing machine provided in this embodiment includes a worktable 1, a motor mounting frame 11, a first support frame 12, a main shaft 2, a brake gear ring 21, a brake lever 3, a rotation drive component 4, an encoder 5, and a controller.

[0028] The motor mounting bracket 11, the first support bracket 12, the rotary drive component 4, and the encoder 5 are all fixedly mounted on the worktable 1. The spindle 2 is rotatably mounted on the first support bracket 12, with one end connected to the output end of the motor 100 under test. The brake gear ring 21 is fixedly sleeved on the outer peripheral wall of the spindle 2. The brake rod 3 is slidably mounted on the worktable 1 and can move towards the side closer to the axis of the spindle 2 to abut against the brake gear ring 21. The output end of the rotary drive component 4 is connected to the other end of the spindle 2 through a transmission mechanism. The detection end of the encoder 5 is connected to the spindle 2 via a transmission mechanism. The controller is electrically connected to the encoder 5 and is used to receive the pulse signal output by the encoder 5 and generate the rotational speed of the spindle 2.

[0029] Optionally, the rotation drive 4 can be a servo motor to meet the requirements of different test speeds; the controller can be a PLC controller to realize the coordinated control of various components; the encoder 5 can be an incremental encoder, which can output pulse signals corresponding to the speed of the spindle 2 in real time to ensure the real-time performance and accuracy of speed detection.

[0030] The working process of the above-mentioned overall structure is as follows: Before the test, the motor under test 100 is installed on the motor mounting bracket 11, and the output end of the motor under test 100 is connected and fixed to one end of the main shaft 2 through a coupling; after the test is started, the controller sends a drive command to the rotation drive component 4, and the rotation drive component 4 drives the main shaft 2 to rotate through the transmission mechanism. The main shaft 2 then drives the output end of the motor under test 100 to rotate synchronously, simulating the rotational operation of the motor under test 100; during this process, the detection end of the encoder 5 rotates synchronously with the main shaft 2, and the encoder 5 transmits the rotation of the main shaft 2. The pulse signal is converted into a pulse signal and transmitted to the controller. After receiving the pulse signal, the controller calculates and generates the real-time rotational speed of the spindle 2 through a preset algorithm, thus completing the acquisition of rotational speed parameters. When it is necessary to simulate an emergency braking condition, the control brake lever 3 is moved to the side closer to the axis of the spindle 2 until the brake lever 3 abuts against the brake gear ring 21 on the outer circumference of the spindle 2. The impact force between the brake lever 3 and the brake gear ring 21 restricts the rotation of the spindle 2, thereby achieving emergency braking. During the braking process, the encoder 5 continuously acquires pulse signals and transmits them to the controller, thus completing the acquisition of rotational speed change parameters under braking conditions.

[0031] The workbench 1 serves as the installation base for the entire equipment. The motor mounting bracket 11 is set on the workbench 1 to ensure the coaxiality of the output end of the motor 100 under test with the spindle 2, reduce deviations in the power transmission process, and improve the accuracy of the test parameters. The first support bracket 12 is set on the workbench 1 and the spindle 2 is rotatably mounted on the first support bracket 12. Through the support of the first support bracket 12 on the spindle 2, the coaxiality of the spindle 2 during rotation is ensured, and the spindle 2 is prevented from bending and deforming due to its own weight or power transmission. This reduces the vibration of the spindle 2 during rotation and further improves the accuracy of speed acquisition.

[0032] To address the issue of smooth power transmission between the rotary drive component 4 and the main shaft 2, and to further improve the stability and accuracy of power transmission, such as... Figure 1 As shown, the workbench 1 is provided with a second support frame 13, and the transmission mechanism between the rotation drive 4 and the main shaft 2 includes a first synchronous pulley 41, a transmission shaft 42 and a second synchronous pulley 43.

[0033] The first synchronous pulley 41 is fixedly mounted on the output end of the rotating drive component 4. The drive shaft 42 is rotatably mounted on the second support frame 13 via bearings. The second synchronous pulley 43 is fixedly sleeved on the drive shaft 42. The first synchronous pulley 41 and the second synchronous pulley 43 are driven by a synchronous belt. One end of the drive shaft 42 is connected to one end of the main shaft 2. Optionally, the bearing between the drive shaft 42 and the second support frame 13 can be a deep groove ball bearing, which can reduce the resistance during the rotation of the drive shaft 42 and improve the power transmission efficiency. The synchronous belt can be a rubber synchronous belt, which can buffer the instantaneous impact force when the rotating drive component 4 starts.

[0034] The structure of the second support frame 13 rotating with the transmission shaft 42 provides stable support for the transmission shaft 42, ensuring the coaxiality of the transmission shaft 42 during rotation, preventing the transmission shaft 42 from deviating during rotation, and reducing power transmission losses. The structure of the first synchronous pulley 41, the second synchronous pulley 43, and the synchronous belt drive, compared with rigid transmission, can achieve smooth power transmission by using the elasticity of the synchronous belt to buffer the instantaneous impact force during the start-up and operation of the rotating drive component 4. At the same time, the characteristics of synchronous transmission can ensure the matching of the output speed of the rotating drive component 4 with the speed of the main shaft 2, improving the stability of the operating speed of the motor 100 under test.

[0035] To address the issue of damage to transmission components or the tested motor 100 due to excessive instantaneous torque during emergency braking, and to further improve the safety of equipment operation, such as... Figure 1 As shown, the end of the drive shaft 42 is connected to the end of the main shaft 2 via a torque limiter 6. Specifically, the input end of the torque limiter 6 is fixedly connected to the end of the drive shaft 42 away from the second synchronous pulley 43, and the output end of the torque limiter 6 is fixedly connected to the end of the main shaft 2 away from the motor under test 100. The torque limiter 6 has a preset fixed torque threshold, which is adapted to the normal operating torque and instantaneous torque range of the motor under test 100 during emergency braking.

[0036] Optionally, torque limiter 6 can be a friction-type torque limiter, which can quickly cut off power in case of overload.

[0037] The torque limiter 6 connects the drive shaft 42 and the main shaft 2, forming a transmission relationship that can be separated by overload. When an instantaneous excessive torque is generated during emergency braking, if the torque exceeds the preset threshold of the torque limiter 6, the input and output ends of the torque limiter 6 can be automatically separated, cutting off the power transmission between the drive shaft 42 and the main shaft 2. This prevents excessive torque from being transmitted to the rotating drive component 4 and the second support frame 13 through the drive shaft 42, thus preventing structural damage to the above components due to overload.

[0038] To address the issues of slow response speed and low control precision of brake lever 3, and to achieve automatic and precise control of brake lever 3, such as... Figure 1 , Figure 3 As shown, a sliding drive component 7 is provided on the worktable 1, and a brake lever 3 is located on the drive end 71 of the sliding drive component 7. Specifically, the fixed end of the sliding drive component 7 is fixedly connected to the worktable 1, and the brake lever 3 is fixedly mounted on the drive end 71 of the sliding drive component 7. The driving direction of the sliding drive component 7 is set in a horizontal direction close to or away from the axis of the spindle 2, and its stroke range covers the distance from the initial position of the brake lever 3 to complete contact with the brake gear ring 21. The sliding drive component 7 is electrically connected to the controller. Optionally, the sliding drive component 7 can be a cylinder or an electric push rod. When a cylinder is used, the driving speed can be controlled by adjusting the air pressure; when an electric push rod is used, precise control of the driving stroke can be achieved.

[0039] The fixed connection structure between the sliding drive component 7 and the brake lever 3 allows the movement power of the brake lever 3 to come directly from the sliding drive component 7. Compared with manual or passive drive structures, this improves the response speed and control accuracy of the brake lever 3, ensuring that the brake lever 3 can engage with the brake gear ring 21 after the braking command is issued, thus ensuring the consistency between the emergency braking process and the actual working conditions. The structure of the sliding drive component 7 being electrically connected to the controller enables automated control of the braking action without manual intervention, reducing response delays and errors caused by human operation. At the same time, it facilitates coordination with the overall control system of the equipment, enabling synchronous linkage between braking action and processes such as speed acquisition and data processing.

[0040] The linear drive stroke controllable characteristic of the sliding drive component 7 allows for adjustment of the drive stroke according to the adaptation requirements of brake gear rings 21 with different diameters, thereby improving the adaptability of the equipment to different spindle 2 structures. The synergistic effect of the above structure with the brake gear ring 21, controller, and other structures optimizes the response speed and control accuracy of emergency braking, ensures the authenticity of parameter acquisition under emergency braking conditions, and improves the automation level and ease of operation of the equipment.

[0041] To address the issue of excessive wear or unstable braking caused by the rigid contact between the brake lever 3 and the brake ring 21, and to further improve the stability of the braking process, such as... Figure 3As shown, the brake lever 3 is vertically oscillating and connected to the drive end 71, and the drive end 71 is provided with a buffer elastic element 72. Specifically, the brake lever 3 is vertically oscillating and connected to the drive end 71 of the sliding drive member 7 via a hinge shaft, the hinge shaft being arranged in a direction parallel to the axis of the main shaft 2, and the two ends of the buffer elastic element 72 abutting against the drive end 71 and the brake lever 3, respectively. Optionally, the buffer elastic element 72 can be a compression spring, and the hinge shaft can be made of stainless steel.

[0042] The abutment structure between the two ends of the buffer elastic element 72 and the drive end 71 and brake rod 3 utilizes the elasticity of the element to provide a continuous swinging force for the brake rod 3, ensuring a stable abutment force between the brake rod 3 and the brake tooth ring 21, thus improving the reliability of the braking effect. At the same time, the buffer elastic element 72 can absorb the instantaneous impact force between the brake rod 3 and the brake tooth ring 21 during braking, reducing wear on both and extending the service life of the braking components. The pre-tightening trend design of the buffer elastic element 72 allows the brake rod 3 to achieve initial contact as it approaches the brake tooth ring 21, shortening the braking response time. The synergistic effect of the above structure with the sliding drive element 7, brake tooth ring 21, and other structures ensures rapid emergency braking response, improves the stability and safety of the braking process, reduces wear on the braking components, and optimizes the braking performance of the equipment.

[0043] To address the issue of the inability to adjust the buffering force provided by the buffer elastic element 72 under different test conditions, such as Figure 3 As shown, an adjusting screw 73 is threadedly connected to the drive end 71. A threaded hole is provided on the drive end 71 above the buffer elastic element 72. The adjusting screw 73 is threaded into this hole, with its lower end passing through the threaded hole and abutting against the upper end of the buffer elastic element 72. The upper end of the adjusting screw 73 extends above the drive end 71 and has a tightening part. Optionally, the adjusting screw 73 can be a fine-thread screw; the tightening part can be a hexagonal head structure for easy adjustment using tools.

[0044] The threaded connection between the adjusting screw 73 and the drive end 71 enables precise control of the up-and-down movement of the adjusting screw 73. By changing the extension and retraction of the buffer elastic element 72, the swing force acting on the brake lever 3 can be precisely adjusted. The self-locking characteristic of the threaded connection allows the adjusting screw 73 to remain in a fixed position after adjustment, preventing displacement of the adjusting screw 73 due to vibration during braking and ensuring the stability of the swing force acting on the brake lever 3 by the buffer elastic element 72.

[0045] To address the issue of drive end 71 shifting due to reaction force during braking of brake lever 3, and to further improve the accuracy of the braking position, such as... Figure 3As shown, the bottom surface of the drive end 71 has a slot 711, and the worktable 1 has a mounting base 14. The drive end 71 is slidably mounted on the top of the mounting base 14. The mounting base 14 has an upward-facing sliding hole 141, and a plug rod 15 is slidably connected inside the sliding hole 141.

[0046] Specifically, the mounting base 14 is fixedly connected to the workbench 1. The top of the mounting base 14 is provided with a sliding groove extending along the moving direction of the drive end 71. The bottom surface of the drive end 71 of the sliding drive component 7 is provided with a slider that matches the sliding groove. The drive end 71 is slidably mounted on the top of the mounting base 14 through the cooperation of the slider and the sliding groove. The slot 711 is opened on the bottom surface of the drive end 71 along the moving direction perpendicular to the drive end 71. The sliding hole 141 is opened below the corresponding braking position of the drive end 71 on the mounting base 14. The size of the sliding hole 141 matches that of the slot 711. The insertion rod 15 is slidably connected in the sliding hole 141. The upper end of the insertion rod 15 can pass through the sliding hole 141 and extend to the top of the mounting base 14, while the lower end is restricted in the sliding hole 141.

[0047] The sliding groove on the top of the mounting base 14 and the sliding block of the drive end 71 provide precise guidance for the movement of the drive end 71, preventing it from deviating during movement. This ensures that the brake rod 3 moves in a direction close to the axis of the main shaft 2, guaranteeing the accuracy of the contact position between the brake rod 3 and the brake gear ring 21, and improving the stability of the braking effect. The alignment and connection structure between the slot 711 and the sliding hole 141, and the insertion and connection of the insert rod 15 with both, can achieve rigid limiting of the drive end 71 when the brake rod 3 reaches the braking position, preventing the drive end 71 from retracting due to braking reaction force during braking. This ensures that the brake rod 3 and the brake gear ring 21 maintain a stable contact state, guaranteeing the continuity and reliability of the braking process. The fixed connection structure between the mounting base 14 and the worktable 1 provides a stable support foundation for the drive end 71 and the brake rod 3, reducing the impact of vibration on the braking components during braking. The synergistic effect of the above structures with the sliding drive component 7, brake rod 3, and other structures improves the accuracy and stability of the braking action, ensures the smooth implementation of emergency braking conditions, and provides structural support for the accuracy of parameter acquisition.

[0048] To automate limit switch actions, such as Figure 4 As shown, a pushing elastic element 16 is provided inside the sliding hole 141. Specifically, the pushing elastic element 16 is disposed inside the sliding hole 141, and the inner bottom wall of the sliding hole 141 is provided with a positioning groove. The lower end of the pushing elastic element 16 is embedded in the positioning groove and connected to the inner bottom wall of the sliding hole 141, and the upper end of the pushing elastic element 16 abuts against the lower end of the insertion rod 15. Optionally, the pushing elastic element 16 can be a compression spring, and the size of the positioning groove is adapted to the size of the pushing elastic element 16.

[0049] The connection structure between the push-up elastic element 16, the insertion rod 15, and the inner bottom wall of the sliding hole 141 provides a continuous upward pushing force for the insertion rod 15, realizing automatic insertion and limiting of the insertion rod 15 and the slot 711. This improves the response speed of the limiting action, ensuring that the driving end 71 can be limited after reaching the braking position, avoiding the driving end 71 from retracting due to braking reaction force, and improving the automation level of the equipment. The positioning groove ensures the stable installation position of the push-up elastic element 16 in the sliding hole 141, preventing the push-up elastic element 16 from shifting during extension and retraction, and ensuring the stable transmission of the pushing force.

[0050] To address the issue of requiring manual operation to release the limit switch of insert rod 15, and to precisely control the sliding range of insert rod 15, such as... Figure 4 As shown, the inner peripheral wall of the sliding hole 141 is provided with a first annular platform 142, the outer periphery of the insertion rod 15 has a second step 152 and a first step 151 located above the second step 152, and a chamber 153 located above the second step 152 is formed between the outer periphery of the insertion rod 15 and the inner wall of the sliding hole 141. The chamber 153 is connected to an external high-pressure gas source through a pipeline, and an electromagnetic reversing valve is provided on the pipeline.

[0051] Specifically, the first annular platform 142 is circumferentially arranged along the inner circumferential wall of the sliding hole 141, and the first step 151 and the second step 152 are circumferentially arranged along the outer circumferential wall of the insertion rod 15, with the first step 151 located above the second step 152. The chamber 153 is formed by the lower surface of the first annular platform 142, the outer circumference of the insertion rod 15, the inner wall of the sliding hole 141, the outer circumference of the first step 151, and the upper surface of the second step 152. One end of the pipeline is connected to the chamber 153, and the other end is connected to an external high-pressure air source. An electromagnetic reversing valve is connected in series in the pipeline and is electrically connected to the controller. Optionally, the electromagnetic reversing valve can be a two-position three-way electromagnetic valve; the pipeline can be a copper pipe.

[0052] The abutting structure between the first ring platform 142 and the first step 151 limits the maximum upward sliding range of the insertion rod 15, preventing the insertion rod 15 from sliding excessively upward due to the action of the push elastic element 16, causing the upper end to protrude too much, ensuring that the upper end of the insertion rod 15 is inserted into the slot 711, preventing the insertion rod 15 from coming out of the sliding hole 141, and improving the stability of the installation of the insertion rod 15.

[0053] The structure of chamber 153 in conjunction with the high-pressure gas source and the electromagnetic reversing valve enables the automatic disengagement of the insertion rod 15 through the driving force generated by the high-pressure gas. Compared with manually pressing the insertion rod 15, this improves the response speed of the limit release and can be automated through the controller, facilitating coordinated linkage with the overall braking process of the equipment. The electrical connection structure between the electromagnetic reversing valve and the controller allows the limit release action to be triggered according to the test process, realizing the automated connection of the braking and reset processes and improving test efficiency.

[0054] To address the issue of axial displacement occurring in the motor under test 100 during testing and to further improve the installation stability of the motor under test 100, such as... Figure 1 As shown, a clamping telescopic component 17 is provided on the workbench 1. Specifically, the clamping telescopic component 17 is fixedly installed on one side of the workbench 1 corresponding to the motor mounting bracket 11. The telescopic end of the clamping telescopic component 17 is oriented towards the motor mounting bracket 11, and its telescopic direction is parallel to the mounting axis of the motor 100 under test. A pressing block is provided at the end of the telescopic end of the clamping telescopic component 17, and the clamping telescopic component 17 is electrically connected to the controller. Optionally, the clamping telescopic component 17 can be a cylinder or an electric push rod, and the pressing block can be made of rubber.

[0055] The fixed connection structure between the tensioning telescopic component 17 and the worktable 1, and the orientation of the telescopic end towards the motor mounting bracket 11, ensure that the clamping force can be transmitted along the mounting axis of the motor under test 100. This guarantees that the motor under test 100 is fixed on the motor mounting bracket 11, preventing displacement of the motor under test 100 due to motor vibration or torque transmission during steady-state operation and emergency braking. It also ensures the coaxiality of the connection between the output end of the motor under test 100 and the main shaft 2, reducing deviations during power transmission and improving the accuracy of parameter acquisition. The setting of the pressure block... The increased contact area between the clamping telescopic component 17 and the housing of the motor under test 100 prevents excessive local pressure from damaging the housing of the motor under test 100 and improves the stability of clamping. The electrical connection structure between the clamping telescopic component 17 and the controller realizes automated control of clamping and unclamping actions, eliminating the need for manual fixing, reducing the difficulty of operation, and improving the efficiency of testing. The telescopic characteristics of the clamping telescopic component 17 can be adapted to motors under test 100 of different lengths and sizes. By adjusting the telescopic amount, different models of motors can be fixed, improving the adaptability of the equipment.

[0056] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A motor rotation testing machine, characterized in that, include: Workbench (1); A motor mounting bracket (11) is provided on the workbench (1) for mounting the motor (100) to be tested. The first support frame (12) is set on the workbench (1). A main shaft (2) is rotatably set on the first support frame (12). One end of the main shaft (2) is used to connect to the output end of the motor (100) under test. A brake gear ring (21) is provided on the outer peripheral wall of the main shaft (2). Brake lever (3) is slidably mounted on the worktable (1). The brake lever (3) can move to the side closer to the axis of the main shaft (2) to abut against the brake gear ring (21) to restrict the rotation of the main shaft (2). A rotation drive (4) is provided on the worktable (1). The output end of the rotation drive (4) is connected to the other end of the spindle (2) through a transmission mechanism, and is used to drive the spindle (2) to rotate. The encoder (5) is mounted on the worktable (1). The detection end of the encoder (5) is connected to the main shaft (2) for transmission. The encoder (5) is used to receive the pulse signal output when the main shaft (2) rotates. The controller is electrically connected to the encoder (5) and is used to receive the pulse signal and generate the rotational speed of the spindle (2) according to the pulse signal.

2. The motor rotation testing machine according to claim 1, characterized in that, The workbench (1) is provided with a second support frame (13); the transmission mechanism includes a first synchronous wheel (41) located at the output end of the rotary drive (4) and a transmission shaft (42) rotatably mounted on the second support frame (13). The transmission shaft (42) is provided with a second synchronous wheel (43). The first synchronous wheel (41) and the second synchronous wheel (43) are driven together by a synchronous belt. One end of the transmission shaft (42) is connected to one end of the main shaft (2) for driving the main shaft (2) to rotate under the action of the rotary drive (4).

3. The motor rotation testing machine according to claim 2, characterized in that, The end of the drive shaft (42) is connected to the end of the main shaft (2) via a torque limiter (6).

4. The motor rotation testing machine according to claim 1, characterized in that, The worktable (1) is provided with a sliding drive (7), and the brake rod (3) is provided on the drive end (71) of the sliding drive (7). The sliding drive (7) can drive the brake rod (3) to move towards the axis of the spindle (2) until it abuts against the brake gear ring (21) to brake the spindle (2).

5. A motor rotation testing machine according to claim 4, characterized in that, The brake lever (3) is vertically oscillatingly connected to the drive end (71). The drive end (71) is provided with a buffer elastic element (72). The two ends of the buffer elastic element (72) respectively abut against the drive end (71) and the brake lever (3). The buffer elastic element (72) is used to provide the force for the brake lever (3) to rotate toward the brake gear ring (21) to oscillate, so as to brake the main shaft (2) through the brake lever (3).

6. The motor rotation testing machine according to claim 5, characterized in that, An adjusting screw (73) is threaded onto the drive end (71). One end of the adjusting screw (73) abuts against the buffer elastic element (72). The adjusting screw (73) can move up and down and tension or compress the buffer elastic element (72) to adjust the swing force of the buffer elastic element (72) on the brake rod (3).

7. A motor rotation testing machine according to claim 4, characterized in that, The bottom surface of the drive end (71) is provided with a slot (711); the workbench (1) is provided with a mounting base (14); the drive end (71) is slidably disposed on the top of the mounting base (14), the mounting base (14) is provided with an upward-facing sliding hole (141), and a plug rod (15) is slidably connected in the sliding hole (141). When the drive end (71) slides to the slot (711) and the sliding hole (141) to communicate, the plug (15) can slide and engage with the slot (711) to limit the position of the drive end (71) relative to the mounting base (14).

8. A motor rotation testing machine according to claim 7, characterized in that, The sliding hole (141) is provided with a push elastic element (16), and the two ends of the push elastic element (16) are respectively connected to the insertion rod (15) and the bottom wall of the sliding hole (141) to provide the force for the insertion rod (15) to slide upward and approach the slot (711).

9. A motor rotation testing machine according to claim 7, characterized in that, The inner peripheral wall of the sliding hole (141) is provided with a first annular platform (142), and the outer periphery of the insertion rod (15) has a second step (152) and a first step (151) located above the second step (152). The first annular platform (142) can abut against the first step (151) to limit the sliding range of the insertion rod (15). A chamber (153) is formed between the outer periphery of the insertion rod (15) and the inner wall of the sliding hole (141) above the second step (152). The chamber (153) is connected to an external high-pressure gas source through a pipeline, and an electromagnetic reversing valve is provided on the pipeline.

10. A motor rotation testing machine according to claim 1, characterized in that, The workbench (1) is provided with a top-tightening telescopic member (17), the telescopic end of which faces the motor mounting frame (11). The top-tightening telescopic member (17) is used to extend outward and press the motor (100) under test onto the motor mounting frame (11).

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