Wiper motor performance testing tool

Abstract

A tool for testing the performance of a wiper motor comprises a base plate, on which a motor stator support seat and a motor output shaft positioning seat are fixedly installed, a positioning groove is provided on the motor stator support seat, the motor output shaft positioning seat comprises an outer fixing sleeve and an inner guide sleeve, the outer fixing sleeve is fixedly connected to the base plate, the outer fixing sleeve is inserted into the mounting hole on the base plate, a stepped hole is axially arranged on the outer fixing sleeve, the upper end of the stepped hole is a large-diameter hole, the inner guide sleeve is in the shape of a hollow stepped shaft, the large-diameter section of the inner guide sleeve is gap-matched with the large-diameter hole of the outer fixing sleeve, the small-diameter section of the inner guide sleeve is gap-matched with the small-diameter hole of the outer fixing sleeve, a compression spring is located between the shaft shoulder of the inner guide sleeve and the shoulder of the stepped hole of the outer fixing sleeve, a connecting head is located in the inner guide sleeve and does not contact the hole wall of the inner guide sleeve, a connecting hole is provided at the upper end of the connecting head, the connecting hole opening is provided with an inner spline section for circumferentially fixing and connecting the motor output shaft, the hole wall of the connecting hole is provided with a plurality of elastic openings, and a torque transmission part for connecting a test device is provided at the lower end of the connecting head.

Description

Technical Field

[0001] The invention relates to the field of automobile component testing, and in particular to a tool for testing the performance of a wiper motor. Background Art

[0002] The wiper motor is the most important component of a car wiper. It converts the motor's rotational motion into the reciprocating motion of the wiper arm through a connecting rod mechanism, thereby achieving the wiper action. When the wiper is working, by selecting high gear or low gear, the current of the motor can be changed, thereby controlling the motor speed to control the speed of the wiper arm. With the fierce competition in the automobile market, manufacturers have higher and higher requirements for the performance of automobile wiper motors. During the manufacturing process, the performance test results are an extremely important parameter indicator of the wiper motor. The manufactured wiper motors will be subjected to performance tests to ensure that the wiper stroke meets the requirements, prevent abnormal noise after the wiper motor is installed, reduce noise, and improve vehicle reliability and customer satisfaction. At present, the performance test of wiper motors usually uses a nut to be fastened to the motor output shaft through threaded matching. The test equipment then clamps the nut through a chuck to connect the motor output shaft to the test equipment, thereby transmitting the torque of the wiper motor output shaft to the test equipment for testing. After the test is completed, the chuck is loosened and the nut is rotated to be removed from the motor output shaft. This method is time-consuming to install and disassemble, and the detection efficiency is low. Usually, after 500 pieces are tested, the connection between the nut and the wiper motor output shaft becomes loose, and the nut needs to be replaced frequently, which has the disadvantage of a short service life. In addition, the transmission of torque through threads will produce a phenomenon of tightening and loosening during the reciprocating rotation of the motor shaft, which consumes the torque and seriously affects the precision and accuracy of the test. Summary of the invention

[0003] In order to solve the above problems in the prior art, the present invention provides a tool for testing the performance of a wiper motor, which can fix the stator of the wiper motor and connect the output shaft of the wiper motor to the testing equipment, stably and accurately transmit the torque, and does not need to frequently replace the nut. The technical solution of the present invention is as follows:

[0004] A tool for testing the performance of a windshield wiper motor comprises a base plate, a motor stator support seat and a motor output shaft positioning seat are fixedly installed on the upper end of the base plate, a positioning groove for fixing the motor stator is provided on the upper end of the motor stator support seat, and the motor output shaft positioning seat comprises an outer fixing sleeve and an inner guide sleeve, the outer fixing sleeve is fixedly connected to the base plate, the lower end of the outer fixing sleeve is inserted into the mounting hole provided on the base plate, a stepped hole is provided in the axial direction of the outer fixing sleeve, the upper end of the stepped hole is a large diameter hole, and the lower end is a small diameter hole, the inner guide sleeve is in the shape of a hollow stepped shaft, and the large diameter section of the inner guide sleeve is aligned with the outer fixing sleeve The large diameter hole is clearance matched, the small diameter section of the inner guide sleeve is clearance matched with the small diameter hole of the outer fixed sleeve, a compression spring is sleeved on the small diameter section of the inner guide sleeve, and is located between the shaft shoulder of the inner guide sleeve and the hole shoulder of the stepped hole of the outer fixed sleeve, a connecting head for connecting the test equipment is located in the inner guide sleeve and does not contact with the hole wall of the inner guide sleeve, a connecting hole is provided at the upper end of the connecting head, an internal spline section for circumferentially fixedly connecting the output shaft of the wiper motor is provided at the orifice of the connecting hole, a plurality of elastic openings extending along the axial direction are provided on the hole wall of the connecting hole, and a torque transmission part for connecting the test equipment is provided at the lower end of the connecting head.

[0005] A waist-shaped hole is arranged on the side wall of the large-diameter hole of the outer fixing sleeve, and a threaded hole corresponding to the waist-shaped hole is arranged on the side wall of the inner guide sleeve, and the threaded hole is used to install a limit screw.

[0006] The width of the waist-shaped hole of the outer fixing sleeve is greater than the diameter of the threaded hole of the inner guide sleeve.

[0007] The outer circumference of the outer fixing sleeve is provided with a positioning flange, and the positioning flange is evenly provided with a plurality of through holes for installing screws, so that the positioning flange is fixedly connected to the bottom plate through the screws.

[0008] The width of the positioning groove of the motor stator support seat matches the width of the wiper motor stator.

[0009] The motor stator support seat is fixed on the bottom plate by a plurality of screws.

[0010] The number of elastic openings on the upper end of the connector is 3 to 4.

[0011] The inner spline section on the connector is a tapered hole section.

[0012] The cross section of the torque transmission part at the lower end of the connecting head is hexagonal.

[0013] A limiting flange is arranged on the shaft section of the connector, and the limiting flange is fixedly connected to the connector via screws, and the limiting flange is located below the inner guide sleeve.

[0014] The above technical solution is adopted: comprising a base plate, the upper end of which is fixedly mounted with a motor stator support seat and a motor output shaft positioning seat, the upper end of which is provided with a positioning groove for fixing the motor stator, the motor output shaft positioning seat comprising an outer fixing sleeve and an inner guide sleeve, the outer fixing sleeve is fixedly connected to the base plate, the lower end of the outer fixing sleeve is inserted into the mounting hole provided on the base plate, the outer fixing sleeve is provided with a stepped hole along the axial direction, the upper end of the stepped hole is a large diameter hole, the lower end is a small diameter hole, the inner guide sleeve is in the shape of a hollow stepped shaft, the large diameter section of the inner guide sleeve is aligned with the large diameter hole of the outer fixing sleeve Clearance fit, the small diameter section of the inner guide sleeve and the small diameter hole of the outer fixed sleeve are clearance fit, a compression spring is sleeved on the small diameter section of the inner guide sleeve, located between the shaft shoulder of the inner guide sleeve and the shoulder of the stepped hole of the outer fixed sleeve, a connector for connecting the test equipment is located in the inner guide sleeve and does not contact the hole wall of the inner guide sleeve, the upper end of the connector is provided with a connecting hole, the hole mouth of the connecting hole is provided with an internal spline section for circumferentially fixing and connecting the wiper motor output shaft, the hole wall of the connecting hole is provided with a plurality of elastic openings extending along the axial direction, and the lower end of the connector is provided with a torque transmission part for connecting the test equipment. With this device, the wiper motor stator can be supported and fixed by the positioning groove at the upper end of the motor stator support seat, the wiper motor output shaft is inserted into the motor output shaft positioning seat and matched with the connector through the spline, and the torque is transmitted to the test equipment through the torque transmission part at the lower end of the connector. The design of the external fixing sleeve, the internal guide sleeve, and the compression spring can play a buffering and protective role when the wiper motor output shaft is inserted into the motor output shaft positioning seat, preventing the reaction force when inserting the connector from impacting the motor and causing damage to the motor, and also allowing the motor output shaft to have axial displacement adjustment. The external spline at the lower end of the wiper motor output shaft meshes with the internal spline section in the connecting hole on the connector to form a circumferential fixation, and because the connecting hole is provided with a plurality of elastic openings, the elastic openings undergo elastic deformation to clamp the motor output shaft, so that the wiper motor output shaft can quickly form a connection with the connector, thereby improving the detection efficiency. The device replaces the nut connection of the traditional tooling with a connector connection provided with an internal spline section and an elastic opening. The torque will not be consumed during the transmission process, and the nut does not need to be replaced frequently. The test results are of high precision and accuracy, and there will be no slipping or loosening. It is quick to install, time-saving, and labor-saving, and can also meet the needs of quick replacement. It only needs to adjust the motor output shaft positioning seat and make a series of sizes according to different products.

[0015] A waist-shaped hole is provided on the side wall of the large-diameter hole of the outer fixing sleeve, and a threaded hole is provided on the side wall of the inner guide sleeve corresponding to the waist-shaped hole. The threaded hole is used to install a limit screw, and the limit screw passes through the waist-shaped hole and is fixedly connected to the inner guide sleeve, so that the displacement stroke of the limit screw is limited by the long axis direction of the waist-shaped hole, thereby achieving the purpose of limiting the displacement stroke of the inner guide sleeve and preventing the output shaft of the wiper motor from jumping up and down too much during the test and affecting the test results.

[0016] The width of the waist-shaped hole of the outer fixing sleeve is greater than the diameter of the threaded hole of the inner guide sleeve, so as to install the limit screw and enable the limit screw to move up and down in the waist-shaped hole.

[0017] The outer circumference of the outer fixing sleeve is provided with a positioning flange for positioning. The positioning flange is evenly provided with a plurality of through holes for installing screws, so that the positioning flange is fixedly connected to the base plate through the screws.

[0018] The width of the positioning groove of the motor stator support seat matches the width of the wiper motor stator, so as to fix the wiper motor stator and enable the test to be carried out stably.

[0019] The motor stator support seat is fixed to the bottom plate by a plurality of screws, and the screw fixation facilitates disassembly and assembly.

[0020] The number of elastic openings on the upper end of the connector is 3 to 4, so that the upper end of the connector can be elastically deformed and can clamp the output shaft of the wiper motor.

[0021] The inner spline section on the connector is a tapered hole section, which is convenient for centering the lower end of the wiper motor output shaft.

[0022] The cross section of the torque transmission part at the lower end of the connecting head is hexagonal, so that the connecting head and the coupling of the testing equipment are circumferentially fixed, which is convenient for transmitting torque.

[0023] A limiting flange is arranged on the shaft section of the connector, and the limiting flange is fixedly connected to the connector by screws, and the limiting flange is located below the inner guide sleeve. When the motor output shaft is pulled out after the test, the limiting flange abuts against the lower end of the inner guide sleeve, so that the connector can be separated from the motor output shaft without being pulled out.

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the present invention when in use;

[0026] Figure 2 It is a structural schematic diagram of the present invention;

[0027] Figure 3 for Figure 2 BB view;

[0028] Figure 4 is a schematic diagram of the structure of the external fixation sleeve;

[0029] Figure 5 for Figure 4 sectional view of

[0030] Figure 6 It is a structural schematic diagram of the inner guide sleeve;

[0031] Figure 7 for Figure 6 A cross-sectional view of

[0032] Figure 8 It is a structural schematic diagram of the motor stator support seat;

[0033] Fig. 9 is a schematic diagram of the structure of the connector;

[0034] Fig.10 for Fig. 9 A cross-sectional view of

[0035] Fig.11 for Fig.10 AA view;

[0036] Fig.12 A schematic diagram of the structure of the base plate. DETAILED DESCRIPTION

[0037] An embodiment of a tool for testing the performance of a wiper motor of the present invention:

[0038] See also Figures 1 to 12A tool for testing the performance of a wiper motor, comprising a base plate 1, the base plate 1 is provided with 4 countersunk holes for installing screws to fix the base plate 1 on the table of the test equipment, the upper end of the base plate 1 is fixed with a motor stator support seat 5 and a motor output shaft positioning seat 7, the upper end of the motor stator support seat 5 is provided with a positioning groove 8 for fixing the motor stator, the width of the positioning groove 8 is consistent with the width of the wiper motor stator, so as to fix the wiper motor stator and enable the test to be carried out stably. The bottom of the positioning groove 8 is provided with 4 countersunk holes for installing countersunk screws to fix the motor stator support seat 5 on the base plate 1, and fixing with countersunk screws is convenient for disassembly and assembly. The motor output shaft positioning seat 7 includes an outer fixing sleeve 2 and an inner guide sleeve 3. The outer fixing sleeve 2 is fixedly connected to the base plate 1. The lower end of the outer fixing sleeve 2 is inserted into the mounting hole set on the base plate 1. The outer circumference of the outer fixing sleeve 2 is provided with a positioning flange 2-2, which plays a positioning role. The positioning flange 2-2 is evenly provided with 3 through holes for installing screws. The mounting holes on the base plate 1 are stepped holes to facilitate the installation of screws, so that the positioning flange 2-2 is fixedly connected to the base plate 1 through screws; the outer fixing sleeve 2 is provided with a stepped hole along the axial direction, the upper end of the stepped hole is a large diameter hole, and the lower end is a small diameter hole. The inner guide sleeve 3 is in the shape of a hollow stepped shaft, the large diameter section of the inner guide sleeve 3 is gap-matched with the large diameter hole of the outer fixing sleeve 2, and the small diameter section of the inner guide sleeve 3 is gap-matched with the small diameter hole of the outer fixing sleeve 2. A compression spring 4 is sleeved on the inner guide sleeve On the small diameter section of the sleeve 3, between the shaft shoulder of the inner guide sleeve 3 and the shoulder of the stepped hole of the outer fixed sleeve 2, two waist-shaped holes 2-1 are symmetrically arranged on the side wall of the large diameter hole of the outer fixed sleeve 2, and two threaded holes 3-1 are arranged on the side wall of the large diameter section of the inner guide sleeve 3 corresponding to the waist-shaped holes 2-1. The threaded holes 3-1 are used to install limit screws, and the limit screws pass through the waist-shaped holes 2-1 and are fixedly connected to the inner guide sleeve 3, so that the displacement stroke of the limit screws is limited by the long axis direction of the waist-shaped holes 2-1, thereby achieving the purpose of limiting the displacement stroke of the inner guide sleeve 3 and preventing the output shaft of the wiper motor from jumping up and down too much during the test and affecting the test results; the width of the waist-shaped hole 2-1 of the outer fixed sleeve 2 is greater than the diameter of the threaded hole 3-1 of the inner guide sleeve 3, so as to install the limit screws and enable the limit screws to move up and down in the waist-shaped holes 2-1.A connector 6 for connecting the test equipment is located in the inner guide sleeve 3 and does not contact the hole wall of the inner guide sleeve 3. The upper end of the connector 6 is provided with a connecting hole 9. The opening of the connecting hole 9 is provided with an inner spline section for circumferentially fixedly connecting the wiper motor output shaft. The lower end of the wiper motor output shaft is provided with an outer spline matched with the inner spline section. The inner spline section of this embodiment is a tapered hole section, which is convenient for centering the lower end of the wiper motor output shaft. Below the inner spline section of the connecting hole 9 is a clearance section. The length of the clearance section is greater than the shaft neck length of the wiper motor output shaft and is used for shaft neck clearance. The hole wall of the connecting hole 9 is provided with a plurality of elastic openings 10 extending along the axial direction. In this embodiment, the elastic openings 10 are set to 4, so that the upper end of the connecting head 6 can undergo elastic deformation and can clamp the output shaft of the wiper motor; a limiting flange 12 is provided on the shaft section of the connecting head 6, and the limiting flange 12 is fixedly connected to the connecting head 6 by screws 13. A radial mounting screw hole 14 is provided on the shaft section of the connecting head 6 for the installation of the screw 13, and a radial through hole is provided on the limiting flange 12 for the screw 13 to pass through, and the limiting flange 12 is located below the inner guide sleeve 3. When the motor output shaft is pulled out after the test, the limiting flange 12 abuts against the lower end of the inner guide sleeve 3, so that the connector 6 can be separated from the motor output shaft without being pulled out; the lower end of the connector 6 is provided with a torque transmission part 11 for connecting the test equipment. The cross section of the torque transmission part 11 of this embodiment is a hexagon, so that the connector 6 and the coupling of the test equipment are fixed circumferentially, which is convenient for transmitting torque; the design of the compression spring 4 ensures that the motor output shaft can be adjusted in the vertical direction, which protects the motor. The surfaces of the bottom plate 1, the outer fixing sleeve 2, the inner guide sleeve 3, and the connector 6 are all blackened to prevent rust. In order to protect the appearance of the wiper motor, the material of the motor stator support seat 5 is polyoxymethylene. With this device, the wiper motor stator can be supported and fixed by the positioning groove 8 at the upper end of the motor stator support seat 5, so that the wiper motor output shaft is inserted into the motor output shaft positioning seat 7 and matched with the connector 6 through the spline, and the torque is transmitted to the test equipment through the torque transmission part 11 at the lower end of the connector 6. The design of the outer fixing sleeve 2, the inner guide sleeve 3, and the compression spring 4 can play a buffering and protective role when the wiper motor output shaft is inserted into the motor output shaft positioning seat 7, preventing the reaction force when inserting the connector 6 from impacting the motor and causing damage to the motor, and also allows the motor output shaft to have axial displacement adjustment. The outer spline at the lower end of the wiper motor output shaft meshes with the inner spline section in the connecting hole 9 on the connector 6 to form a circumferential fixation, and because the connecting hole 9 is provided with a plurality of elastic openings 10, the elastic openings 10 undergo elastic deformation to clamp the motor output shaft, so that the wiper motor output shaft can quickly form a connection with the connector, thereby improving the detection efficiency.The device replaces the nut connection of the traditional tooling with a connector 6 provided with an internal spline section and an elastic opening 10. The torque will not be consumed in the transmission process, and there is no need to replace the nut frequently. The test results are highly precise and accurate, and there will be no slipping or loosening. The installation is quick, time-saving and labor-saving, and it can meet the quick-change requirements. It only needs to adjust the motor output shaft positioning seat 7 and make it into a series of sizes according to different products.

[0039] When testing the wiper motor output shaft, the output shaft of the wiper motor to be tested is inserted into the motor output shaft positioning seat 7, and connected with the spline of the connector 6 located in the inner guide sleeve 3, and the stator of the wiper motor is placed in the positioning groove 8 of the motor stator support seat 5 for positioning. Thus, the wiper motor can be started for testing. After the test, the wiper motor is turned off, and the wiper motor to be tested is pulled upward. Since the limiting flange 12 limits the connector 6, the connector 6 will not be pulled out, and the motor output shaft can be separated from the connector 6, and the tested wiper motor can be removed, and then another wiper motor to be tested can be replaced for testing. The entire replacement process is simple and convenient, and the replacement is fast, which can greatly improve the test efficiency; at the same time, the phenomenon of torque consumption is also eliminated.

Claims

1. A tool for testing the performance of a wiper motor, comprising a base plate (1), characterized in that: The upper end of the base plate (1) is fixedly mounted with a motor stator support seat (5) and a motor output shaft positioning seat (7); the upper end of the motor stator support seat (5) is provided with a positioning groove (8) for fixing the motor stator; the motor output shaft positioning seat (7) comprises an outer fixing sleeve (2) and an inner guide sleeve (3); the outer fixing sleeve (2) is fixedly connected to the base plate (1); the lower end of the outer fixing sleeve (2) is inserted into a mounting hole provided on the base plate (1); a stepped hole is provided along the axial direction of the outer fixing sleeve (2); the upper end of the stepped hole is a large diameter hole and the lower end is a small diameter hole; the inner guide sleeve (3) is in the shape of a hollow stepped shaft; the large diameter section of the inner guide sleeve (3) is clearance-matched with the large diameter hole of the outer fixing sleeve (2); the inner guide sleeve The small diameter section of the inner guide sleeve (3) is loosely matched with the small diameter hole of the outer fixing sleeve (2); a compression spring (4) is sleeved on the small diameter section of the inner guide sleeve (3) and is located between the shaft shoulder of the inner guide sleeve (3) and the hole shoulder of the stepped hole of the outer fixing sleeve (2); a connecting head (6) for connecting a test device is located in the inner guide sleeve (3) and does not contact the hole wall of the inner guide sleeve (3); a connecting hole (9) is provided at the upper end of the connecting head (6); an inner spline section for circumferentially fixing and connecting the output shaft of the wiper motor is provided at the hole mouth of the connecting hole (9); a plurality of elastic openings (10) extending along the axial direction are provided on the hole wall of the connecting hole (9); and a torque transmission part (11) for connecting the test device is provided at the lower end of the connecting head (6).

2. The tooling for testing the performance of a wiper motor according to claim 1, characterized in that: A waist-shaped hole (2-1) is provided on the side wall of the large-diameter hole of the outer fixing sleeve (2), and a threaded hole (3-1) corresponding to the waist-shaped hole (2-1) is provided on the side wall of the inner guide sleeve (3), and the threaded hole (3-1) is used to install a limit screw.

3. The tooling for testing the performance of a wiper motor according to claim 2, characterized in that: The width of the waist-shaped hole (2-1) of the outer fixing sleeve (2) is greater than the diameter of the threaded hole (3-1) of the inner guide sleeve (3).

4. The tooling for testing the performance of a wiper motor according to claim 1, characterized in that: The outer circumference of the outer fixing sleeve (2) is provided with a positioning flange (2-2), and the positioning flange (2-2) is evenly provided with a plurality of through holes for installing screws, so that the positioning flange (2-2) is fixedly connected to the base plate (1) by means of the screws.

5. The tooling for testing the performance of a wiper motor according to claim 1, characterized in that: The width of the positioning groove (8) of the motor stator support seat (5) matches the width of the wiper motor stator.

6. The tooling for testing the performance of a wiper motor according to claim 1, characterized in that: The motor stator support seat (5) is fixed on the base plate (1) by means of a plurality of screws.

7. The tooling for testing the performance of a wiper motor according to claim 1, characterized in that: The number of elastic openings (10) on the upper end of the connector (6) is 3 to 4.

8. The tooling for testing the performance of a wiper motor according to claim 1, characterized in that: The internal spline section on the connector (6) is a tapered hole section.

9. The tooling for testing the performance of a wiper motor according to claim 1, characterized in that: The torque transmission portion (11) at the lower end of the connecting head (6) has a hexagonal cross section.

10. The tooling for testing the performance of a wiper motor according to claim 1, characterized in that: A limiting flange (12) is provided on the shaft section of the connecting head (6), and the limiting flange (12) is fixedly connected to the connecting head (6) by means of screws. The limiting flange (12) is located below the inner guide sleeve (3).

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