Cogging torque detection device

Abstract

The utility model relates to the field of torque measurement, in particular to a cogging torque detection device, which comprises an electric push rod fixedly mounted in a detection table, an adaptive clamping assembly arranged at the top end of the electric push rod, the adaptive clamping assembly comprises a push rod, and a push block fixedly connected to the top end of the push rod. The outer surface of the pushing block is movably connected with three clamping arms, the bottom ends of the clamping arms are fixedly connected with movable arms, the sides, away from the clamping arms, of the movable arms are movably connected with fixed arms, and the bottom ends of the fixed arms are fixedly connected with the electric push rod. Self-adaptive flexible clamping of motors of different sizes is achieved, the clamping process and automatic positioning of the transmission shaft are synchronously completed, the linkage sliding block is accurately guided in the rectangular sliding groove, the axial deviation of the transmission shaft of the motor and the torque is reduced, and the problem of measurement data drift caused by manual centering errors is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of torque measurement, and in particular to a tooth cogging torque detection device. Background Technology

[0002] Cogging torque, also known as positioning torque, refers specifically to the force that tends to keep the rotor of a permanent magnet motor in certain specific positions when it is stationary. In existing cogging torque detection equipment, a square worktable and a screw are often used for fixing. When replacing the motor, the screw needs to be manually adjusted to achieve the fixing effect. However, the screw needs to be manually replaced and aligned during use, which is a cumbersome and inconvenient operation process. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, this utility model provides a tooth cogging torque detection device.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A tooth cogging torque detection device includes a detection platform, an electric push rod fixedly installed inside the detection platform, an adaptive clamping assembly provided at the top of the electric push rod, the adaptive clamping assembly including a push rod, a push block fixedly connected to the top of the push rod, three clamping arms movably connected to the outer surface of the push block, a movable arm fixedly connected to the bottom of the clamping arm, a fixed arm movably connected to the side of the movable arm away from the clamping arm, the bottom of the fixed arm fixedly connected to the electric push rod, a clamping block fixedly connected to the side of the clamping arm away from the push block, a plurality of rubber pads fixedly connected to the side of the clamping block away from the clamping arm, the plurality of rubber pads being arranged in a stepped manner, a linkage arm fixedly connected to the outer surface of the push rod, a linkage rod fixedly connected to the side of the linkage arm away from the push rod, a linkage slider fixedly connected to the side of the linkage rod away from the linkage arm, a rectangular slide groove is opened inside the detection platform, the linkage slider is slidably connected to the detection platform through the rectangular slide groove, a limit silencing pad is fixedly connected to the side of the linkage slider away from the linkage rod, and a rectangular opening is opened at the center of the limit silencing pad.

[0005] As a preferred technical solution of this utility model, the top of the limiting sound-absorbing pad is provided with a noise reduction component. The noise reduction component includes a sound-absorbing chamber. A connecting block is fixedly connected to the top of the sound-absorbing chamber. A rotating shaft is fixedly connected to the side of the connecting block away from the sound-absorbing chamber. A torque detector is fixedly connected to the end of the drive rod of the rotating shaft near the sound-absorbing chamber. The top of the rotating shaft is fixedly connected to the detection table.

[0006] As a preferred technical solution of this utility model, a vibration damping component is provided at the top of the push block. The vibration damping component includes a vibration damping base. Three extrusion rods are fixedly connected to the bottom end of the vibration damping base. An extrusion plate is fixedly connected to the bottom end of the extrusion rods. A vibration damping spring is fixedly connected to the side of the extrusion plate away from the extrusion rods. A vibration damping chamber is movably sleeved on the outer surface of the vibration damping spring.

[0007] Compared with the prior art, the beneficial effects that this utility model can achieve are:

[0008] This invention utilizes a three-jaw linkage clamping mechanism driven by an electric push rod, combined with a stepped rubber pad structure, to achieve adaptive flexible clamping of motors of different sizes. The clamping process is completed synchronously with the automatic positioning of the transmission shaft. The precise guidance of the linkage slider in the rectangular groove reduces the axial deviation between the motor transmission shaft and the torque axis, effectively reducing the problem of measurement data drift caused by human centering errors.

[0009] This invention uses a vibration damping base to absorb high-frequency vibrations through rubber pads, and then uses a compression rod and spring structure to convert the vibrations into medium-frequency vibrations, effectively reducing signal distortion caused by resonance during the testing process.

[0010] This invention effectively reduces electromagnetic noise interference signal distortion by using an acoustic labyrinth structure formed by limiting sound-absorbing pads and sound-absorbing chambers. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the push rod of this utility model;

[0013] Figure 3 This is a schematic diagram of the structure of the vibration damping base of this utility model;

[0014] Figure 4 This is a schematic diagram of the structure of the limiting and sound-absorbing pad of this utility model;

[0015] Figure 5 This is a schematic diagram of the torque detector of this utility model.

[0016] The components include: 1. Testing platform; 2. Electric push rod; 3. Push rod; 4. Push block; 5. Clamping arm; 6. Clamping block; 7. Rubber pad; 8. Movable arm; 9. Fixed arm; 10. Vibration damping base; 11. Extrusion rod; 12. Extrusion plate; 13. Vibration damping spring; 14. Vibration damping chamber; 15. Linkage arm; 16. Linkage rod; 17. Linkage slider; 18. Limiting and silencing pad; 19. Silencing chamber; 20. Connecting block; 21. Rotating shaft; 22. Torque detector. Detailed Implementation

[0017] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this utility model. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0018] Example: Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the device includes a testing table 1. An electric push rod 2 is fixedly installed inside the testing table 1. The electric push rod 2 is a Shenli LW new type push rod. An adaptive clamping assembly is provided at the top of the electric push rod 2. The adaptive clamping assembly includes a push rod 3. A push block 4 is fixedly connected to the top of the push rod 3. Three clamping arms 5 are movably connected to the outer surface of the push block 4. A movable arm 8 is fixedly connected to the bottom end of the clamping arm 5. A fixed arm 9 is movably connected to the side of the movable arm 8 away from the clamping arm 5. The bottom end of the fixed arm 9 is fixedly connected to the electric push rod 2. A clamping block 6 is fixedly connected to the side of the clamping arm 5 away from the push block 4. A clamping block 6 is fixedly connected to the side of the clamping arm 5 away from the clamping arm 5. There are several rubber pads 7 arranged in a stepped manner. A linkage arm 15 is fixedly connected to the outer surface of the push rod 3. A linkage rod 16 is fixedly connected to the side of the linkage arm 15 away from the push rod 3. A linkage slider 17 is fixedly connected to the side of the linkage rod 16 away from the linkage arm 15. A rectangular slide groove is opened inside the detection table 1. The linkage slider 17 is slidably connected to the detection table 1 through the rectangular slide groove. A limiting noise reduction pad 18 is fixedly connected to the side of the linkage slider 17 away from the linkage rod 16. A rectangular opening is opened at the center of the limiting noise reduction pad 18.

[0019] When the device detects the cogging torque of the motor, the bottom of the motor rests on the vibration damping base 10. A sensor at the top of the push block 4 measures the motor. After measurement, the control system controls the electric push rod 2 to push upwards. This upward movement of the electric push rod 2 drives the push rod 3 upwards, which in turn drives the push block 4 upwards. The upward movement of the push block 4 causes the clamping arm 5 and the movable arm 8 to clamp inwards. The clamping arm 5 clamps inwards, causing the clamping block 6 to clamp inwards. The clamping block 6 then clamps the motor with the rubber pad 7, preventing instability during testing. The deviation affects the detection effect. At the same time, the push rod 3 pushes upward, which drives the linkage arm 15 and linkage rod 16 to push upward. The linkage arm 15 and linkage rod 16 push upward, which drives the linkage slider 17 to slide upward along the rectangular slide groove on the detection table 1. The upward sliding of the linkage slider 17 drives the limiting and silencing pad 18 to push upward. The rectangular opening at the center of the limiting and silencing pad 18 limits the detection motor transmission rod. As the detection motor pushes upward, the transmission rod is connected to the torque detector 22, thereby detecting the cogging torque. This avoids the instability of manual alignment and improves the detection efficiency and accuracy of cogging torque.

[0020] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a noise reduction component is provided at the top of the limiting noise reduction pad 18. The noise reduction component includes a noise reduction chamber 19. A connecting block 20 is fixedly connected to the top of the noise reduction chamber 19. A rotating shaft 21 is fixedly connected to the side of the connecting block 20 away from the noise reduction chamber 19. A torque detector 22 is fixedly connected to the end of the drive rod of the rotating shaft 21 near the noise reduction chamber 19. The torque detector 22 is an HBK-shaft end torque sensor T210. The top of the rotating shaft 21 is fixedly connected to the detection table 1.

[0021] When the detection motor is connected to the torque detector 22, the limiting silencing pad 18 is pushed upward to connect with the silencing chamber 19. After connection, the limiting silencing pad 18 and the silencing chamber 19 form an isolation space, which blocks the noise generated when the motor rotates, and avoids the noise affecting the signal sent by the torque detector 22, thereby reducing the detection effect and improving the accuracy of the equipment detection.

[0022] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a vibration damping component is provided at the top of the push block 4. The vibration damping component includes a vibration damping base 10. Three extrusion rods 11 are fixedly connected to the bottom end of the vibration damping base 10. An extrusion plate 12 is fixedly connected to the bottom end of the extrusion rods 11. A vibration damping spring 13 is fixedly connected to the side of the extrusion plate 12 away from the extrusion rods 11. A vibration damping chamber 14 is movably sleeved on the outer surface of the vibration damping spring 13.

[0023] When the detection motor rotates and generates vibration, the vibration of the detection motor squeezes the extrusion rod 11. After being squeezed, the extrusion rod 11 squeezes the extrusion plate 12 and the damping spring 13. After being squeezed, the extrusion plate 12 and the damping spring 13 cancel out the vibration force, thereby reducing the vibration force and avoiding the impact of noise and instability generated by vibration on the detection effect.

[0024] Working principle:

[0025] Please refer to Figures 1-5 As shown, when the device is testing the cogging torque of the motor, the bottom of the motor is placed on the vibration damping base 10. The sensor at the top of the push block 4 measures the motor. After the measurement is completed, the control system controls the electric push rod 2 to push upward. The upward push of the electric push rod 2 drives the push rod 3 to push upward, which in turn drives the push block 4 to push upward. The upward push of the push block 4 drives the clamping arm 5 and the movable arm 8 to clamp inward. The clamping arm 5 clamps inward, which in turn drives the clamping block 6 to clamp inward. The clamping block 6 clamps inward, which in turn clamps the rubber pad 7 to clamp the motor, thus preventing the motor from being unstable during testing. The deviation affects the detection effect. At the same time, the push rod 3 pushes upward, which drives the linkage arm 15 and linkage rod 16 to push upward. The linkage arm 15 and linkage rod 16 push upward, which drives the linkage slider 17 to slide upward along the rectangular slide groove on the detection table 1. The upward sliding of the linkage slider 17 drives the limiting and silencing pad 18 to push upward. The rectangular opening at the center of the limiting and silencing pad 18 limits the detection motor transmission rod. As the detection motor pushes upward, the transmission rod is connected to the torque detector 22, thereby detecting the cogging torque. This avoids the instability of manual alignment and improves the detection efficiency and accuracy of cogging torque.

[0026] When the detection motor is connected to the torque detector 22, the limiting silencing pad 18 is pushed upward to connect with the silencing chamber 19. After connection, the limiting silencing pad 18 and the silencing chamber 19 form an isolation space, which blocks the noise generated when the motor rotates, and avoids the noise affecting the signal sent by the torque detector 22, thereby reducing the detection effect and improving the accuracy of the equipment detection.

[0027] When the detection motor rotates and generates vibration, the vibration of the detection motor squeezes the extrusion rod 11. After being squeezed, the extrusion rod 11 squeezes the extrusion plate 12 and the damping spring 13. After being squeezed, the extrusion plate 12 and the damping spring 13 cancel out the vibration force, thereby reducing the vibration force and avoiding the impact of noise and instability generated by vibration on the detection effect.

[0028] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A tooth cogging torque detection device, comprising a detection platform (1), wherein an electric push rod (2) is fixedly installed inside the detection platform (1), characterized in that, The electric push rod (2) is provided with an adaptive clamping assembly at its top end. The adaptive clamping assembly includes a push rod (3). A push block (4) is fixedly connected to the top end of the push rod (3). Three clamping arms (5) are movably connected to the outer surface of the push block (4). A movable arm (8) is fixedly connected to the bottom end of the clamping arm (5). A fixed arm (9) is movably connected to the side of the movable arm (8) away from the clamping arm (5). The bottom end of the fixed arm (9) is fixedly connected to the electric push rod (2). A clamping block (6) is fixedly connected to the side of the clamping arm (5) away from the push block (4).

2. The tooth cogging torque detection device according to claim 1, characterized in that, The clamping block (6) has several rubber pads (7) fixedly connected to the side away from the clamping arm (5), and the rubber pads (7) are arranged in a stepped manner.

3. The tooth cogging torque detection device according to claim 2, characterized in that, A linkage arm (15) is fixedly connected to the outer surface of the push rod (3). A linkage rod (16) is fixedly connected to the side of the linkage arm (15) away from the push rod (3). A linkage slider (17) is fixedly connected to the side of the linkage rod (16) away from the linkage arm (15). A rectangular groove is provided inside the detection table (1). The linkage slider (17) is slidably connected to the detection table (1) through the rectangular groove.

4. The tooth cogging torque detection device according to claim 3, characterized in that, The linkage slider (17) is fixedly connected to a limiting noise reduction pad (18) on the side away from the linkage rod (16), and a rectangular opening is provided at the center of the limiting noise reduction pad (18).

5. The tooth cogging torque detection device according to claim 4, characterized in that, The top of the limiting silencing pad (18) is provided with a noise reduction component, which includes a silencing chamber (19). A connecting block (20) is fixedly connected to the top of the silencing chamber (19). A rotating shaft (21) is fixedly connected to the side of the connecting block (20) away from the silencing chamber (19). A torque detector (22) is fixedly connected to the end of the drive rod of the rotating shaft (21) near the silencing chamber (19). The top of the rotating shaft (21) is fixedly connected to the detection table (1).

6. The tooth cogging torque detection device according to claim 5, characterized in that, The top of the push block (4) is provided with a vibration damping component, which includes a vibration damping base (10). Three extrusion rods (11) are fixedly connected to the bottom of the vibration damping base (10). An extrusion plate (12) is fixedly connected to the bottom of the extrusion rods (11). A vibration damping spring (13) is fixedly connected to the side of the extrusion plate (12) away from the extrusion rods (11). A vibration damping chamber (14) is movably sleeved on the outer surface of the vibration damping spring (13).

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