Motor performance test platform

Abstract

The utility model relates to motor performance detection, in particular to a motor performance test platform. The cogging torque data collection of the test motor can be effectively and reliably completed, and the test mechanism is reliable and stable in structure. Comprising a conveying line and a tray, and the surface of the tray is provided with a through hole for a motor shaft of a test motor to pass through; the device further comprises a testing mechanism. The testing mechanism comprises an L-shaped mounting plate, and the bottom of the L-shaped mounting plate is connected with a piston rod of a guide cylinder; a traction motor is mounted on the L-shaped mounting plate and is in transmission connection with the torque sensor; the torque sensor is connected with the sleeve through the coupler. An inner sleeve is coaxially arranged in the sleeve, an annular cavity is formed between the inner sleeve and the sleeve, a sliding sleeve capable of axially sliding is arranged in the annular cavity, and a pressure spring is arranged between the sliding sleeve and the bottom wall of the sleeve; a trapezoid table is arranged in the sliding sleeve in the axial direction, a notch extending in the axial direction is correspondingly formed in the inner sleeve, and the trapezoid table can stretch out and draw back in the axial direction through the elastic force of the compression spring.

Description

Technical Field

[0001] This utility model relates to motor performance testing, and more particularly to a motor performance testing platform. Background Technology

[0002] During the production of electric motors, various performance indicators need to be tested to ensure that the motors are qualified and meet performance standards, including the cogging torque test. Cogging torque refers to the periodic torque pulsation generated when the motor is not energized (no current), due to the change in magnetic resistance between the rotor permanent magnet and the stator core slots. This is a crucial performance indicator for electric motors.

[0003] Currently, the main method for testing cogging torque relies on torque sensors to measure torque fluctuations during motor rotor rotation. However, existing testing procedures have limitations: in most cases, manual or automated robotic arms are required to place each motor onto the test platform; furthermore, since most motor shafts have keys, manual assistance is needed to insert them into the device connected to the motor shaft on the test platform to transfer the torque of the traction device to the test motor and obtain its torque information. This testing method has low production efficiency and cannot meet the needs of automated production operations. Therefore, developing a reliable and efficient automated testing device for testing motor cogging torque has become a key problem urgently needing to be solved by those skilled in the art. Summary of the Invention

[0004] This utility model addresses the shortcomings of existing technologies by providing a motor performance testing platform.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a motor performance testing platform, including a conveyor line and a tray on the conveyor line for carrying the test motor, the tray surface having through holes for the motor shaft of the test motor to pass through; it also includes a testing mechanism; the testing mechanism includes an L-shaped mounting plate, the bottom of which is connected to the piston rod of a guide cylinder for driving the testing mechanism to move vertically; a traction motor is mounted on the L-shaped mounting plate, the traction motor being connected to a torque sensor via a synchronous pulley set; the torque sensor is connected to a sleeve via a coupling for collecting the cogging torque data of the test motor.

[0006] The sleeve has an inner sleeve coaxially arranged inside, forming an annular cavity between the inner sleeve and the sleeve. A sliding sleeve that can slide axially is arranged in the annular cavity, and a compression spring is arranged between the sliding sleeve and the bottom wall of the sleeve. A trapezoidal platform is arranged axially inside the sliding sleeve, and a corresponding axially extending slot is opened on the inner sleeve. The trapezoidal platform can extend and retract axially by the elastic force of the compression spring. When the key of the motor shaft contacts the trapezoidal platform, the compression spring is compressed to make the trapezoidal platform avoid the key. After the key and the trapezoidal platform are aligned, the compression spring resets to achieve the engagement of the torque transmission surface.

[0007] Furthermore, the L-shaped mounting plate consists of mutually perpendicular horizontal and vertical sections; a bracket is fixedly installed below the horizontal section, the driving pulley of the synchronous belt pulley set is fixedly installed on the output shaft of the traction motor, the driven pulley is coaxially connected to the input end of the torque sensor, and the driving pulley and the driven pulley are driven by a synchronous belt; the bottom of the bracket is rigidly connected to the piston rod of the guide cylinder; the torque sensor is installed on the vertical section through a flange, and the output end of the torque sensor is coaxially connected to the rod of the sleeve through a coupling.

[0008] Furthermore, the sleeve is fixedly installed on the vertical part of the L-shaped mounting plate by a sleeve support seat, and the sleeve support seat is fixed to the vertical part by locking bolts.

[0009] Furthermore, the bottom of the bracket is connected to the piston rod of the guide cylinder via a connecting plate.

[0010] Furthermore, the sleeve includes an outer sleeve and a rod integrally formed at the bottom of the outer sleeve. The inner sleeve, the sliding sleeve, and the compression spring are coaxially arranged in the inner cavity of the outer sleeve. The inner sleeve is fixedly connected to the bottom wall of the outer sleeve. A retaining ring is provided at the top opening of the outer sleeve. The retaining ring is fixedly connected to the outer sleeve by fasteners to limit the axial displacement of the sliding sleeve. The end of the rod is provided with a keyway or spline that mates with the coupling.

[0011] Furthermore, the outer shell adopts a top-open cylindrical shell structure.

[0012] Furthermore, the sliding sleeve includes an annular body, with a trapezoidal platform fixed to the inner wall of the annular body and axially penetrating the annular body.

[0013] Furthermore, the inner sleeve adopts a ring structure, which has a slot along the axial direction that matches the width of the trapezoidal platform.

[0014] Furthermore, the conveyor line is installed on top of the conveyor line frame, and a horizontally extending support beam is provided in the middle of the conveyor line frame. The guide cylinder seat of the testing mechanism is installed on the support beam.

[0015] Furthermore, the inner diameter of the inner sleeve is larger than the outer diameter of the motor shaft of the test motor.

[0016] Compared with the prior art, this utility model has the following advantages.

[0017] This utility model's motor performance testing platform, through its sleeve structure, enables stable and reliable automatic engagement and disengagement with the motor shaft (keyed motor shaft) of the test motor, thereby transferring the torque of the traction motor to the motor under test. Furthermore, by transmitting the torque of the traction motor to a torque sensor, and then from the torque sensor to the test motor, it effectively and reliably collects cogging torque data from the test motor. The testing mechanism structure is reliable and stable. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The scope of protection of the present invention is not limited to the following description.

[0019] Figure 1 This is the overall front view of the motor performance testing platform in the embodiment.

[0020] Figure 2 This is the front view of the testing mechanism of the motor performance testing platform in the embodiment.

[0021] Figure 3 This is a three-dimensional view of the testing mechanism of the motor performance testing platform in the embodiment.

[0022] Figure 4 This is a schematic diagram of the synchronous belt pulley group structure in the test mechanism of the motor performance test platform of the embodiment.

[0023] Figure 5 This is an exploded view of the sleeve in the embodiment.

[0024] Figure 6 This is a top view of the embodiment where the motor shaft is inserted into the sleeve without interference.

[0025] Figure 7 This is a perspective view of the sleeve in the embodiment.

[0026] Figure 8 This is a perspective view of the sliding sleeve in the embodiment.

[0027] Figure 9 This is a partial sectional view of the sleeve in the embodiment.

[0028] Figure 10 This is a top view of the motor shaft inserted into the sleeve during interference in the embodiment. Detailed Implementation

[0029] To make the objectives, technical solutions, and beneficial effects of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0030] like Figure 1-10 As shown, the motor performance testing platform includes a conveyor line 1 and a tray 103 mounted on the conveyor line 1 for supporting the test motor 2. The conveyor line 1 is installed on top of the conveyor line frame 101, and a horizontally extending support beam 102 is provided in the middle of the conveyor line frame 101. The guide cylinder 305 of the testing mechanism 3 is mounted on the support beam 102.

[0031] The tray 103 has through holes on its surface for the motor shaft 201 of the test motor 2 to pass through; it also includes a test mechanism 3; the test mechanism 3 includes an L-shaped mounting plate 301, the bottom of which is connected to the piston rod of the guide cylinder 305 for driving the test mechanism 3 to move vertically; a traction motor 302 is mounted on the L-shaped mounting plate 301, and the traction motor 302 is connected to the torque sensor 307 via a synchronous pulley set 303; the torque sensor 307 is connected to the sleeve 310 via a coupling 308, and is used for... The cogging torque data of the test motor 2 is collected. An inner sleeve 3103 is coaxially arranged inside the sleeve 310, forming an annular cavity between the inner sleeve 3103 and the sleeve 310. A sliding sleeve 312 capable of axial sliding is provided within this annular cavity. A compression spring 311 is provided between the sliding sleeve 312 and the bottom wall of the sleeve 310. A trapezoidal platform 3122 is provided axially inside the sliding sleeve 312. Specifically, the sliding sleeve 312 includes an annular body 3121, and the trapezoidal platform 3122 is fixed to the inner wall of the annular body 3121 and axially penetrates the annular body 3121. The inner sleeve 3103 adopts an annular structure, and this annular structure has an axially formed slot 3104 that mates with the trapezoidal platform 3122. The width of the slot 3104 matches the width of the trapezoidal platform 3122. The trapezoidal platform 3122 can extend and retract axially by the elastic force of the compression spring 311. When the key 202 of the motor shaft 201 contacts the trapezoidal platform 3122, the compression spring 311 is compressed so that the trapezoidal platform 3122 avoids the key 202. After the key 202 and the trapezoidal platform 3122 are aligned, the compression spring 311 resets to achieve the engagement of the torque transmission surface.

[0032] The working principle of this motor performance testing platform is as follows: After the conveyor line 1 delivers the tray 103 carrying the test motor 2 to the testing station, the guide cylinder 305 drives the testing mechanism 3 to descend, so that the sleeve 310 is aligned with the motor shaft 201; when the key 202 of the motor shaft contacts the trapezoidal platform 3122 inside the sleeve 310, the compression spring 311 is compressed, and the traction motor 302 drives the sliding sleeve 312 to slide axially to avoid collision. After the keyway is aligned, the compression spring resets to complete the self-locking engagement; the traction motor 302 drives the torque sensor 307 to rotate through the synchronous pulley group 303, drives the engaged motor shaft to rotate and collects the cogging torque data in real time. After the test is completed, the mechanism automatically resets, realizing automated testing of ≤45 seconds / piece. Its adaptive structure can tolerate ±1.5mm alignment deviation, which significantly reduces the wear rate compared with the traditional rigid connection scheme.

[0033] Preferably, the L-shaped mounting plate 301 consists of a horizontal part and a vertical part that are perpendicular to each other; a bracket 306 is fixedly installed below the horizontal part, the driving pulley of the synchronous belt pulley group 303 is fixedly installed on the output shaft of the traction motor 302, the driven pulley is coaxially connected to the input end of the torque sensor 307, and the driving pulley and the driven pulley are driven by a synchronous belt; the bottom of the bracket 306 is connected to the piston rod of the guide cylinder 305. The torque sensor 307 is installed on the vertical part through a flange, and the output end of the torque sensor 307 is coaxially connected to the rod part 3101 of the sleeve 310 through a coupling 308.

[0034] Preferably, the sleeve 310 is fixedly installed on the vertical part of the L-shaped mounting plate 301 by the sleeve support 309, and the sleeve support 309 is fixed on the vertical part by locking bolts.

[0035] Preferably, the sleeve 310 includes an outer sleeve 3102 and a rod portion 3101 integrally formed at the bottom of the outer sleeve 3102, and the outer sleeve 3102 adopts a top-open cylindrical shell structure. The inner sleeve 3103, the sliding sleeve 312, and the compression spring 311 are coaxially arranged in the inner cavity of the outer sleeve 3102; and the inner sleeve 3103 is fixedly connected to the bottom wall of the outer sleeve 3102, and the inner diameter of the inner sleeve 3103 is larger than the outer diameter of the motor shaft 201 of the test motor 2. A retaining ring 313 is provided at the top opening of the outer sleeve 3102, and the retaining ring 313 is fixedly connected to the outer sleeve 3102 by fasteners to limit the axial displacement of the sliding sleeve 312; the end of the rod portion 3101 is provided with a keyway or spline that mates with the coupling 308.

[0036] Work process:

[0037] 1. Test preparation stage: The test motor 2 is carried by the tray 103 and transported to the test station along the conveyor line 1. It is precisely positioned by photoelectric sensor or mechanical limiter. At this time, the central axis of the sleeve 310 of the test mechanism 3 coincides with the central axis of the motor shaft 201 of the test motor 2.

[0038] 2. Axial docking stage: The guide cylinder 305 is activated, lifting the test mechanism 3 a certain distance upwards via the connecting plate 304. The rising of the test mechanism 3 drives the sleeve 310 upwards, and the motor shaft 201 is inserted into the inner sleeve 3103 of the sleeve 310.

[0039] 3. During the process of inserting the motor shaft 201 into the inner sleeve 3103 a certain distance, two situations may occur depending on the relative position of the key 202 and the trapezoidal platform 3122.

[0040] Case 1: During the insertion process, the key 202 of the motor shaft 201 is circumferentially misaligned with the trapezoidal platform 3122, and the motor shaft 201 is directly inserted into the inner sleeve 3103. At this time, the traction motor 302 drives the sleeve 310 to rotate through the synchronous pulley group 303, and the sleeve 310 drives the sliding sleeve 312 to rotate. The sliding sleeve 312 contacts the key 202 side through the side of the trapezoidal platform 3122, forming a torque transmission surface.

[0041] Scenario 2: During the insertion process, the key 202 of the motor shaft 201 mechanically interferes with the end face of the upward-moving trapezoidal platform 3122. At this time, the end of the key 202 of the motor shaft 201 presses against the end of the trapezoidal platform 3122. As the test mechanism 3 continues to rise, the trapezoidal platform 3122 is passively extended a certain distance into the sleeve 310 along the sliding sleeve 312, forcing the sliding sleeve 312 to axially compress the compression spring 311. At this time, the traction motor 302 is started, driving the sleeve 310 to rotate. The sleeve 310 drives the sliding sleeve 312 to rotate, thereby causing the trapezoidal platform 3122 and the key 202 to move relative to each other. When the interference between them is eliminated, the compression spring 311 resets and pushes the sliding sleeve 312 back to its original position, completing the engagement of the torque transmission surface.

[0042] It is understood that the above specific description of this utility model is only used to illustrate this utility model and is not limited to the technical solutions described in the embodiments of this utility model. Those skilled in the art should understand that modifications or equivalent substitutions can still be made to this utility model to achieve the same technical effect; as long as the use needs are met, they are all within the protection scope of this utility model.

Claims

1. A motor performance testing platform, comprising a conveyor line (1) and a tray (103) disposed on the conveyor line (1) for supporting a test motor (2), wherein the surface of the tray (103) is provided with a through hole for the motor shaft (201) of the test motor (2) to pass through; characterized in that: It also includes a testing mechanism (3); the testing mechanism (3) includes an L-shaped mounting plate (301), the bottom of which is connected to the piston rod of the guide cylinder (305) for driving the testing mechanism (3) to move in the vertical direction; a traction motor (302) is mounted on the L-shaped mounting plate (301), and the traction motor (302) is connected to the torque sensor (307) through a synchronous pulley group (303); the torque sensor (307) is connected to the sleeve (310) through a coupling (308) for collecting the cogging torque data of the testing motor (2); An inner sleeve (3103) is coaxially arranged inside the sleeve (310), forming an annular cavity between the inner sleeve (3103) and the sleeve (310). A sliding sleeve (312) capable of axial sliding is provided in the annular cavity, and a compression spring (311) is provided between the sliding sleeve (312) and the bottom wall of the sleeve (310). A trapezoidal platform (3122) is provided axially inside the sliding sleeve (312), and a corresponding axially extending groove is provided on the inner sleeve (3103). The trapezoidal platform (3122) can extend and retract axially by the elastic force of the compression spring (311). When the key (202) of the motor shaft (201) contacts the trapezoidal platform (3122), the compression spring (311) is compressed to make the trapezoidal platform (3122) avoid the key (202). After the key (202) and the trapezoidal platform (3122) are aligned, the compression spring (311) resets to achieve the meshing of the torque transmission surface.

2. The motor performance test platform of claim 1, wherein: The L-shaped mounting plate (301) consists of a horizontal part and a vertical part that are perpendicular to each other. A bracket (306) is fixedly installed below the horizontal part. The driving wheel of the synchronous pulley group (303) is fixedly installed on the output shaft of the traction motor (302). The driven wheel is coaxially connected to the input end of the torque sensor (307), and the driving wheel and the driven wheel are driven by a synchronous belt. The bottom of the bracket (306) is rigidly connected to the piston rod of the guide cylinder (305). The torque sensor (307) is installed on the vertical part through a flange. The output end of the torque sensor (307) is coaxially connected to the rod part (3101) of the sleeve (310) through a coupling (308).

3. The motor performance test platform of claim 2, wherein: The sleeve (310) is fixedly installed on the vertical part of the L-shaped mounting plate (301) by the sleeve support (309), and the sleeve support (309) is fixed on the vertical part by the locking bolt.

4. The motor performance test platform according to claim 2 or 3, characterized in that: The bottom of the bracket (306) is connected to the piston rod of the guide cylinder (305) via a connecting plate (304).

5. The motor performance test platform of claim 2, wherein: The sleeve (310) includes an outer sleeve (3102) and a rod (3101) integrally formed at the bottom of the outer sleeve (3102). The inner sleeve (3103), the sliding sleeve (312) and the compression spring (311) are coaxially arranged in the inner cavity of the outer sleeve (3102). The inner sleeve (3103) is fixedly connected to the bottom wall of the outer sleeve (3102). A retaining ring (313) is provided at the top opening of the outer sleeve (3102). The retaining ring (313) is fixedly connected to the outer sleeve (3102) by fasteners to limit the axial displacement of the sliding sleeve (312). The end of the rod (3101) is provided with a keyway or spline that mates with the coupling (308).

6. The motor performance test platform of claim 5, wherein: The outer shell (3102) adopts a top-open cylindrical shell structure.

7. The motor performance testing platform according to claim 5, characterized in that: The sliding sleeve (312) includes an annular body (3121), and a trapezoidal platform (3122) is fixed to the inner wall of the annular body (3121) and axially penetrates the annular body (3121).

8. The motor performance test platform of claim 5, wherein: The inner sleeve (3103) adopts a ring structure, which has a slot (3104) along the axial direction that matches the trapezoidal platform (3122). The width of the slot (3104) matches the width of the trapezoidal platform (3122).

9. The motor performance test platform of claim 1, wherein: The conveyor line (1) is installed on the top of the conveyor frame (101), and a horizontally extending support beam (102) is provided in the middle of the conveyor frame (101). The guide cylinder (305) of the test mechanism (3) is mounted on the support beam (102).

10. The motor performance test platform of claim 1, wherein: The inner diameter of the inner sleeve (3103) is larger than the outer diameter of the motor shaft (201) of the test motor (2).

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