Electric vehicle motor rotating speed testing device

Abstract

The utility model relates to the technical field of electric vehicle motor testing, in particular to an electric vehicle motor rotating speed testing device. The device comprises a detection bench. One end of the top of the detection bench is fixedly connected with a mounting seat. A rotating speed torque meter is arranged at the other end of the top of the detection table; in order to solve the problem that a belt cannot be driven to rotate due to small friction force between an output shaft of a to-be-tested motor and the belt, the to-be-tested motor is fixed through a clamping assembly, then the output shaft of the to-be-tested motor is sleeved with a first rotating wheel, and a rotating block is rotated to drive a bidirectional ball screw to rotate; the ball nut seat drives the limiting sleeves to move in opposite directions, and the two limiting sleeves clamp and fix the output shaft of the to-be-tested motor, so that when the to-be-tested motor rotates, the to-be-tested motor drives the limiting sleeves and the first rotating wheel to rotate through the output shaft, and transmission of the to-be-tested motor is completed. The problem that the belt cannot be driven to rotate due to small friction force between the output shaft of the to-be-tested motor and the belt is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicle motor testing, in particular to an electric vehicle motor speed testing device. Background Art

[0002] Electric vehicles conform to the concept of green travel, are economical and affordable, and are deeply loved by people. The electric vehicle drive axle is an important component that drives the movement of electric vehicles. In order to ensure the production quality of the motor, the motor is often tested for performance such as speed and torque before leaving the factory.

[0003] A Chinese patent with the announcement number CN115825735A discloses an electric vehicle motor performance test bench, which relates to the field of electric vehicle motor testing and detection technology. The present invention includes a test bench, an operating tool, a test tool and a test motor; a slide groove is provided on the surface of the test bench; a lifting pile is provided at one end of the slide groove; the operating tool includes an operating bench, a clamping drive cylinder, an L-shaped connecting rod and a slider; the test tool includes a synchronous belt, a bearing seat and a speed torque meter; one end of the output shaft of the speed torque meter passes through the bearing seat and is connected to the output shaft of the test motor through a synchronous belt. The present invention drives one of the sliders to slide back and forth in the rectangular through-groove through the output end of the clamping drive cylinder, and the L-shaped connecting rod rotates with the square rotating plate; the L-shaped rods at the other three corners of the square rotating plate will move their respective sliders back and forth synchronously; the clamps on the four sliders clamp the test motor to fix motors of different sizes, which is easy to operate and improves the accuracy of the motor performance test.

[0004] In the above technology, test motors of different sizes can be fixed, but during the detection process, the belt is directly mounted on the output shaft of the test motor. The output shaft is usually smoother and has a relatively small diameter. The output shaft of the test motor may not be able to drive the belt to rotate due to the small friction between the output shaft and the belt when outputting, thereby failing to accurately test the rotation speed.

[0005] Therefore, in order to solve the above problems, an electric vehicle motor speed testing device is proposed. Utility Model Content

[0006] Therefore, the technical problem to be solved by the utility model is to overcome the problem in the prior art that the belt cannot be driven to rotate due to the small friction between the output shaft and the belt.

[0007] In order to solve the above technical problems, the utility model provides a motor speed testing device for an electric vehicle.

[0008] In one embodiment of the utility model, it includes a testing platform, one end of the top of the testing platform is fixedly connected to a mounting seat; the other end of the top of the testing platform is provided with a speed torque meter; a clamping assembly is provided in the mounting seat, and a motor to be tested is provided in the clamping assembly, and a transmission mechanism is installed on the output shaft of the motor to be tested, and the transmission mechanism includes a first rotating wheel, four fixed plates are fixedly connected to the top of the first rotating wheel, two sliding columns are fixedly connected between two adjacent fixed plates, two limit sleeves are slidably connected to the two sliding columns, the two limit sleeves are symmetrically arranged on the sliding columns, and the inner side walls of the limit sleeves are provided with anti-slip grooves; a bidirectional ball screw is rotatably connected between the other two fixed plates through bearings, and one end of the limit sleeve is threadedly connected to the bidirectional ball screw; one end of the bidirectional ball screw extends to the outside of the fixed plate and is fixedly connected to a rotating block.

[0009] In one embodiment of the utility model, a second rotating wheel is fixedly connected to the output shaft of the speed torque meter, and a belt is sleeved between the first rotating wheel and the second rotating wheel.

[0010] In one embodiment of the utility model, the clamping assembly includes a gear ring rotatably connected to the top of the mounting seat through a bearing; the top of the detection platform is rotatably connected to four gear columns through a rotating shaft, and the four gear columns are circumferentially arranged on the inner side of the gear ring and are all engaged with the gear ring; the bottom end of the mounting seat is slidably connected to four racks, and the racks are respectively engaged with adjacent gear columns; one end of the rack arranged on the inner side of the mounting seat is fixedly connected to a connecting block, and the top of the connecting block is fixedly connected to a splint.

[0011] In one embodiment of the utility model, the bottom of the rack is fixedly connected to a limit block, and four limit openings are opened on the detection platform. The limit blocks slide in the limit openings; an electric push rod is fixedly connected to the bottom of the detection platform, and the output end of the electric push rod is fixedly connected to one of the limit blocks.

[0012] In one embodiment of the utility model, a lifting frame is slidably connected to the detection platform, the speed torque meter is fixedly connected to the top of the lifting frame, the top of the detection platform is fixedly connected to a drive motor, the output shaft of the drive motor is fixedly connected to a reciprocating screw, the reciprocating screw is rotatably connected to the detection platform through a bearing, and the lifting frame is threadedly connected to the reciprocating screw.

[0013] In one embodiment of the utility model, the detection platform is provided with two rectangular openings, and the lifting frame slides in the two rectangular openings.

[0014] In one embodiment of the present invention, the inner side walls of the clamping plates are fixedly connected with buffer pads, and the inner side walls of the buffer pads are configured to be serrated.

[0015] In one embodiment of the utility model, four pillars are fixedly connected to the bottom of the detection platform, and the four pillars are respectively arranged at the four corners of the detection platform; the length of the pillars is longer than the reciprocating screw rod.

[0016] The above technical solution of the utility model has the following advantages compared with the prior art:

[0017] The electric vehicle motor speed testing device described in the utility model is provided with a bidirectional ball screw and a first rotating wheel. In order to solve the problem that the friction between the output shaft of the motor to be tested and the belt is small and the belt cannot be driven to rotate, the motor to be tested is fixed by a clamping component, and then the first rotating wheel sleeve is arranged on the output shaft of the motor to be tested, and the rotating block is rotated to drive the bidirectional ball screw to rotate. Since a ball nut seat is provided at the connection between the bidirectional ball screw and the limit sleeve, the radial movement of the limit sleeve is guaranteed by the ball nut seat, and the limit sleeve is driven to move in the opposite direction by the ball nut seat. During the movement of the limit sleeve, the limit sleeve slides on the sliding column, and the sliding column limits the limit sleeve in the horizontal direction. The two limit sleeves clamp and fix the output shaft of the motor to be tested, so that when the motor to be tested rotates, the motor to be tested drives the limit sleeve and the first rotating wheel to rotate through the output shaft, thereby completing the transmission of the motor to be tested, and solving the problem that the friction between the output shaft of the motor to be tested and the belt is small and the belt cannot be driven to rotate.

[0018] The utility model discloses an electric vehicle motor speed test device, which is provided with a tooth column, a rack and a gear ring. Due to the different sizes of the motors to be tested, when it is necessary to fix the motors to be tested of different sizes, when it is necessary to drive the rack to move, an electric push rod is turned on, and the connected rack is driven to move by the electric push rod, and the adjacent tooth column is driven to rotate by the rack, and the gear ring is driven to rotate by the tooth column, and several other tooth columns are driven to rotate by the gear ring, and several other racks are driven to move by the tooth column, and a connecting block is driven to move by the rack, and the connecting block stops moving when it moves to a suitable position, and the motor to be tested is placed on the connecting block, and the rack is continuously driven to move, and the rack drives the connecting block to continue to move, and the splint is driven to move by the connecting block, and the motor to be tested is clamped by the splint to achieve fixation of the motor to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.

[0020] Figure 1 It is the first stereogram in the utility model;

[0021] Figure 2 It is the second stereogram in the utility model;

[0022] Figure 3 It is a three-dimensional diagram of the gear ring, gear column and rack in the utility model;

[0023] Figure 4 It is a three-dimensional diagram of the lifting frame in the utility model;

[0024] Figure 5 It is a three-dimensional diagram of the limiting sleeve in the utility model;

[0025] Explanation of the reference numerals in the accompanying drawings in the specification: 1. Test table; 2. Mounting seat; 3. Gear ring; 4. Gear column; 5. Rack; 6. Clamp; 7. Motor to be tested; 8. Connecting block; 9. Limit block; 10. Limit opening; 11. Electric push rod; 12. First rotating wheel; 13. Second rotating wheel; 14. Belt; 15. Speed ​​torque meter; 16. Lifting frame; 17. Driving motor; 18. Reciprocating screw; 19. Limit sleeve; 20. Fixed plate; 21. Sliding column; 22. Bidirectional ball screw; 23. Rotary block; 24. Pillar. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0027] Reference Figure 1-Figure 5 As shown, an electric vehicle motor speed test device of the utility model comprises a test bench 1, a mounting seat 2 is fixedly connected to one end of the top of the test bench 1; a speed torque meter 15 is arranged at the other end of the top of the test bench 1; a clamping assembly is arranged in the mounting seat 2, a motor to be tested 7 is arranged in the clamping assembly, a transmission mechanism is installed on the output shaft of the motor to be tested 7, the transmission mechanism comprises a first rotating wheel 12, four fixed plates 20 are fixedly connected to the top of the first rotating wheel 12, two sliding columns 21 are fixedly connected between two adjacent fixed plates 20, two limiting sleeves 19 are slidably connected to the two sliding columns 21, the two limiting sleeves 19 are symmetrically arranged on the sliding columns 21, and the inner side walls of the limiting sleeves 19 are provided with anti-slip grooves; a bidirectional ball screw 22 is rotatably connected between the other two fixed plates 20 through a bearing, one end of the limiting sleeve 19 is threadedly connected to the bidirectional ball screw 22; one end of the bidirectional ball screw 22 extends to the outside of the fixed plate 20 and is fixedly connected to a rotating block 23.

[0028] During operation, in order to solve the problem that the friction between the output shaft of the motor 7 to be tested and the belt 14 is small and the belt 14 cannot be driven to rotate, the motor 7 to be tested is fixed by a clamping assembly, and then the first rotating wheel 12 is sleeved on the output shaft of the motor 7 to be tested. By rotating the rotary block 23, the rotary block 23 drives the bidirectional ball screw 22 to rotate. Since a ball nut seat is provided at the connection between the bidirectional ball screw 22 and the limiting sleeve 19, the radial movement of the limiting sleeve 19 is ensured by the ball nut seat, and the limiting sleeve 19 is driven by the ball nut seat. The limit sleeve 19 moves in the opposite direction. During the movement, the limit sleeve 19 slides on the sliding column 21. The sliding column 21 limits the limit sleeve 19 in the horizontal direction. The two limit sleeves 19 clamp and fix the output shaft of the motor 7 to be tested. Therefore, when the motor 7 to be tested rotates, the motor 7 to be tested drives the limit sleeve 19 and the first rotating wheel 12 to rotate through the output shaft, thereby completing the transmission of the motor 7 to be tested, solving the problem that the friction between the output shaft of the motor 7 to be tested and the belt 14 is small and the belt 14 cannot be driven to rotate.

[0029] Further, such as Figure 1 As shown, a second rotating wheel 13 is fixedly connected to the output shaft of the speed torque meter 15 , and a belt 14 is sleeved between the first rotating wheel 12 and the second rotating wheel 13 .

[0030] During operation, after the motor 7 to be tested is started, the output shaft of the motor 7 to be tested drives the limit sleeve 19 and the first rotating wheel 12 to rotate, the first rotating wheel 12 drives the belt 14 to rotate, the belt 14 drives the second rotating wheel 13 to rotate, the second rotating wheel 13 drives the output shaft of the speed torque meter 15 to rotate, and the speed torque meter 15 collects the motor speed signal and torque signal, thereby completing the test of the motor 7 to be tested.

[0031] Further, such as Figure 1 and Figure 3 As shown, the clamping assembly includes a gear ring 3 rotatably connected to the top of the mounting seat 2 through a bearing; the top of the detection platform 1 is rotatably connected to four gear columns 4 through a rotating shaft, and the four gear columns 4 are circumferentially arranged on the inner side of the gear ring 3 and are all engaged with the gear ring 3; the bottom end of the mounting seat 2 is slidably connected to four racks 5, and the racks 5 are respectively engaged with adjacent gear columns 4; one end of the rack 5 arranged on the inner side of the mounting seat 2 is fixedly connected to a connecting block 8, and the top of the connecting block 8 is fixedly connected to a clamping plate 6.

[0032] During operation, due to the different sizes of the motors 7 to be tested, when it is necessary to fix the motors 7 to be tested of different sizes, one of the racks 5 is driven to move, and the adjacent gear column 4 is driven to rotate through the rack 5, and the gear ring 3 is driven to rotate through the gear column 4, and the other gear columns 4 are driven to rotate through the gear ring 3, and the other racks 5 are driven to move through the gear column 4, and the connecting block 8 is driven to move through the rack 5, and the connecting block 8 is stopped when it moves to a suitable position, and the motor 7 to be tested is placed on the connecting block 8, and the rack 5 is continued to be driven to move, and the rack 5 drives the connecting block 8 to continue to move, and the connecting block 8 drives the clamping plate 6 to move, and the motor 7 to be tested is clamped by the clamping plate 6, so as to fix the motor 7 to be tested.

[0033] Further, such as Figure 2 and Figure 3 As shown, the bottom of the rack 5 is fixedly connected to a limit block 9, and four limit openings 10 are opened on the detection platform 1. The limit blocks 9 slide in the limit openings 10; the bottom of the detection platform 1 is fixedly connected to an electric push rod 11, and the output end of the electric push rod 11 is fixedly connected to one of the limit blocks 9.

[0034] During operation, when it is necessary to drive the rack 5 to move, the electric push rod 11 is turned on, and the connected rack 5 is driven to move by the electric push rod 11. Through the cooperation of the rack 5, the gear column 4 and the gear ring 3, the four racks 5 move synchronously, and the limit block 9 is driven to move by the rack 5, and the rack 5 is limited to move in the horizontal direction by the limit block 9.

[0035] Further, such as Figure 1 and Figure 4 As shown, a lifting frame 16 is slidably connected to the detection platform 1, the speed torque meter 15 is fixedly connected to the top of the lifting frame 16, a driving motor 17 is fixedly connected to the top of the detection platform 1, and a reciprocating screw 18 is fixedly connected to the output shaft of the driving motor 17. The reciprocating screw 18 is rotatably connected to the detection platform 1 through a bearing, and the lifting frame 16 is threadedly connected to the reciprocating screw 18.

[0036] During operation, due to the different sizes and heights of the motor 7 to be tested, it is necessary to adjust the output shaft of the speed torque meter 15 and the output shaft of the motor 7 to be tested to a suitable angle. By turning on the drive motor 17, the reciprocating screw 18 is driven to rotate by the output shaft of the drive motor 17, and the lifting frame 16 is driven to move by the reciprocating screw 18. The lifting frame 16 moves in the vertical direction. When the height of the output shaft of the speed torque meter 15 and the output shaft of the motor 7 to be tested is adjusted to a suitable height, the movement is stopped to realize the test of the motor 7 to be tested at different heights.

[0037] Further, such as Figure 4 As shown, the detection platform 1 is provided with two rectangular openings, and the lifting frame 16 slides in the two rectangular openings.

[0038] During operation, the lifting frame 16 slides in the rectangular opening on the testing platform 1 during the movement, and the rectangular opening limits the lifting frame 16 in the vertical direction.

[0039] Further, such as Figure 3 As shown, the inner side walls of the clamping plate 6 are fixedly connected with buffer pads, and the inner side walls of the buffer pads are designed to be serrated.

[0040] During operation, the buffer pad is fixed to the inner wall of the clamping plate 6, and the inner wall of the buffer pad is set to be serrated, which not only facilitates to increase the friction force to stabilize the motor 7 to be tested, but also has the performance of buffering protection to prevent the surface of the motor 7 to be tested from being scratched.

[0041] Further, such as Figure 1 As shown, four pillars 24 are fixedly connected to the bottom of the detection platform 1 , and the four pillars 24 are respectively arranged at the four corners of the detection platform 1 ; the length of the pillars 24 is longer than the reciprocating screw rod 18 .

[0042] During operation, the support column 24 is provided to ensure the stability of the testing platform 1 and keep the reciprocating screw rod 18 working normally.

[0043] Working principle: Due to the different sizes of the motors 7 to be tested, when it is necessary to fix the motors 7 to be tested of different sizes, when it is necessary to drive the rack 5 to move, the electric push rod 11 is turned on, and the connected rack 5 is driven to move by the electric push rod 11, and the adjacent gear column 4 is driven to rotate by the rack 5, and the gear ring 3 is driven to rotate by the gear column 4, and the other gear columns 4 are driven to rotate by the gear ring 3, and the other racks 5 are driven to move by the gear column 4, and the connecting block 8 is driven to move by the rack 5, and the connecting block 8 is stopped when it moves to a suitable position, and the motor 7 to be tested is placed on the connecting block 8, and the rack 5 is continued to be driven to move, and the rack 5 drives the connecting block 8 to continue to move, and the splint 6 is driven to move by the connecting block 8, and the motor 7 to be tested is clamped by the splint 6, so as to fix the motor 7 to be tested;

[0044] Since the motor 7 to be tested has different sizes and heights, when the output shaft of the speed torque meter 15 and the output shaft of the motor 7 to be tested need to be adjusted to a suitable angle, the drive motor 17 is turned on, and the reciprocating screw 18 is driven to rotate by the output shaft of the drive motor 17, and the lifting frame 16 is driven to move by the reciprocating screw 18, and the lifting frame 16 moves in the vertical direction. When the height of the output shaft of the speed torque meter 15 and the output shaft of the motor 7 to be tested is adjusted to a suitable height, the movement is stopped, and the test of the motor 7 to be tested at different heights is realized;

[0045] Then the first rotating wheel 12 is sleeved on the output shaft of the motor 7 to be tested, and the rotating block 23 is rotated to drive the bidirectional ball screw 22 to rotate. Since a ball nut seat is provided at the connection between the bidirectional ball screw 22 and the limiting sleeve 19, the ball nut seat ensures the radial movement of the limiting sleeve 19, and the ball nut seat drives the limiting sleeve 19 to move in the opposite direction. During the movement of the limiting sleeve 19, the limiting sleeve 19 slides on the sliding column 21, and the sliding column 21 limits the limiting sleeve 19 in the horizontal direction. The two limiting sleeves 19 clamp and fix the output shaft of the motor 7 to be tested, so that when the motor 7 to be tested rotates, the motor 7 to be tested passes The output shaft drives the limit sleeve 19 and the first rotating wheel 12 to rotate, thereby completing the transmission of the motor 7 to be tested, solving the problem that the friction between the output shaft of the motor 7 to be tested and the belt 14 is small and cannot drive the belt 14 to rotate; after the motor 7 to be tested is started, the output shaft of the motor 7 to be tested drives the limit sleeve 19 and the first rotating wheel 12 to rotate, the first rotating wheel 12 drives the belt 14 to rotate, the belt 14 drives the second rotating wheel 13 to rotate, the second rotating wheel 13 drives the output shaft of the speed torque meter 15 to rotate, and the speed torque meter 15 collects the motor speed signal and the torque signal, thereby completing the test of the motor 7 to be tested.

[0046] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. An electric vehicle motor speed test device, comprising a test bench (1), wherein one end of the top of the test bench (1) is fixedly connected to a mounting seat (2); a speed torque meter (15) is provided at the other end of the top of the test bench (1); a clamping assembly is provided in the mounting seat (2), a motor to be tested (7) is provided in the clamping assembly, and a transmission mechanism is installed on the output shaft of the motor to be tested (7), characterized in that: The transmission mechanism comprises a first rotating wheel (12), the top of which is fixedly connected to four fixed plates (20), wherein two sliding columns (21) are fixedly connected between two adjacent fixed plates (20), two limiting sleeves (19) are slidably connected to the two sliding columns (21), the two limiting sleeves (19) are symmetrically arranged on the sliding columns (21), and the inner side walls of the limiting sleeves (19) are provided with anti-slip grooves; a bidirectional ball screw (22) is rotatably connected between the other two fixed plates (20) via a bearing, one end of the limiting sleeve (19) is threadedly connected to the bidirectional ball screw (22); one end of the bidirectional ball screw (22) extends to the outside of the fixed plate (20) and is fixedly connected to a rotary block (23).

2. The electric vehicle motor speed test device according to claim 1, characterized in that: A second rotating wheel (13) is fixedly connected to the output shaft of the speed torque meter (15), and a belt (14) is sleeved between the first rotating wheel (12) and the second rotating wheel (13).

3. The electric vehicle motor speed test device according to claim 2, characterized in that: The clamping assembly comprises a toothed ring (3) rotatably connected to the top of the mounting seat (2) via a bearing; the top of the detection platform (1) is rotatably connected to four toothed columns (4) via a rotating shaft; the four toothed columns (4) are circumferentially arranged on the inner side of the toothed ring (3) and are all meshed with the toothed ring (3); the bottom end of the mounting seat (2) is slidably connected to four racks (5), the racks (5) are respectively meshed with adjacent toothed columns (4); one end of the racks (5) arranged on the inner side of the mounting seat (2) is fixedly connected to a connecting block (8), and the top of the connecting block (8) is fixedly connected to a clamping plate (6).

4. The electric vehicle motor speed test device according to claim 3, characterized in that: The bottom of the rack (5) is fixedly connected to a limit block (9), and the detection platform (1) is provided with four limit openings (10), and the limit blocks (9) slide in the limit openings (10); the bottom of the detection platform (1) is fixedly connected to an electric push rod (11), and the output end of the electric push rod (11) is fixedly connected to one of the limit blocks (9).

5. The electric vehicle motor speed test device according to claim 4, characterized in that: A lifting frame (16) is slidably connected to the detection platform (1), the speed torque meter (15) is fixedly connected to the top of the lifting frame (16), a driving motor (17) is fixedly connected to the top of the detection platform (1), an output shaft of the driving motor (17) is fixedly connected to a reciprocating screw (18), the reciprocating screw (18) is rotatably connected to the detection platform (1) via a bearing, and the lifting frame (16) is threadedly connected to the reciprocating screw (18).

6. The electric vehicle motor speed test device according to claim 5, characterized in that: The detection platform (1) is provided with two rectangular openings, and the lifting frame (16) slides in the two rectangular openings.

7. The electric vehicle motor speed test device according to claim 6, characterized in that: The inner side walls of the clamping plates (6) are all fixedly connected with buffer pads, and the inner side walls of the buffer pads are configured to be serrated.

8. The electric vehicle motor speed test device according to claim 7, characterized in that: Four pillars (24) are fixedly connected to the bottom of the detection platform (1), and the four pillars (24) are respectively arranged at four corners of the detection platform (1); the length of the pillars (24) is longer than the reciprocating screw rod (18).

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