A wiper motor testing machine

Abstract

This invention discloses a wiper motor testing machine, which includes a test platform; a sub-base mounted on the test platform; a test shaft rotatably mounted on the sub-base, the test shaft having a torque body, and a wiper motor connected to the test shaft; a torque simulation mechanism is also mounted on the sub-base; the torque simulation mechanism includes a moving part, torque arms, and an elastic element, the moving part being able to slide relative to the test shaft, the torque arms being arranged in pairs and connected to the moving part, the paired torque arms being able to rotate synchronously in opposite directions, and the elastic element being able to apply a thrust to the moving part; by using the paired torque arms of the torque simulation mechanism, the torque applied to the output shaft of the motor by the wiper during actual use is simulated, making the entire testing environment closely resemble the actual usage scenario, reducing the occupied area, and allowing the test platform to support more motors for simultaneous testing.

Description

Technical Field

[0001] This invention relates to motor testing, and more particularly to a wiper motor testing machine. Background Technology

[0002] Wiper motor testing machines are automated or semi-automated devices specifically designed for testing the performance, reliability, and durability of wiper motors. They can simulate the actual working environment and conditions of wiper motors and accurately detect whether their various parameters meet design standards.

[0003] In actual operation, the wiper motor drives both wipers to rotate simultaneously via a linkage structure. Each rotation of the wiper motor's output shaft causes the linkage structure to perform one wiping action. However, in practice, the direction of the torque applied to the wiper motor's output shaft by the linkage structure per rotation is not the same. We divide each rotation into the first and second halves. In the first half, the output shaft drives the wiper to rotate upwards via the linkage structure, and the linkage structure applies a torque in the opposite direction to the motor's output shaft. In the second half, the output shaft drives the wiper to rotate downwards via the linkage structure. The wiper, due to its own weight, has a downward rotational force, and the linkage structure applies a force in the same direction as the wiper's rotation.

[0004] In the existing technology, some wiper motor testing machines cannot simulate this working environment, while some wiper testing machines directly connect the wiper mechanism to the wiper motor to simulate the working environment. This linkage structure will occupy a large working space of the testing machine, making it impossible for the testing machine to test multiple wiper motors at the same time. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is: it is difficult to simulate the working environment.

[0006] The above-mentioned technical problems are solved by the following technical solution: This invention proposes a wiper motor testing machine, which includes a test platform; a sub-base mounted on the test platform; a test shaft rotatably mounted on the sub-base, the test shaft having a torque body, and a wiper motor connected to the test shaft; a torque simulation mechanism is also mounted on the sub-base; the torque simulation mechanism includes a moving part, torque arms, and an elastic element, the moving part being able to slide relative to the test shaft, the torque arms being arranged in pairs and connected to the moving part, the paired torque arms being able to rotate synchronously in opposite directions, and the elastic element being able to apply a thrust to the moving part; the paired torque arms having slots, the torque body being located inside the slots, and each time the test shaft rotates one revolution, the two paired torque arms being able to apply thrust in different directions to the test shaft respectively.

[0007] In a preferred embodiment of the wiper motor testing machine of the present invention: a coupling is installed on the test shaft, and the wiper motor is connected to the test shaft through the coupling.

[0008] In a preferred embodiment of the wiper motor testing machine of the present invention: a synchronization ring is coaxially arranged on the test shaft, and the torque body is mounted on the synchronization ring.

[0009] In a preferred embodiment of the wiper motor testing machine of the present invention: the moving part includes a column connected to an elastic member and a head connected to a torque arm; the torque arm is rotatably mounted on the head via a rotating shaft.

[0010] In a preferred embodiment of the wiper motor testing machine of the present invention: the paired torque arms are each equipped with a synchronous gear via a rotating shaft, and the synchronous gears installed on the paired torque arms mesh.

[0011] In a preferred embodiment of the wiper motor testing machine of the present invention: the torque arm has a first end and a second end, and the torque arm has a gap area between the first end and the second end; the test shaft is located in the gap area; the slot is located at the first end, and the second end of the torque arm is connected to the moving part.

[0012] In a preferred embodiment of the wiper motor testing machine of the present invention: the torsion body has four protrusions, the four protrusions including a first protrusion, a second protrusion, a third protrusion, and a fourth protrusion; the distance between the first protrusion and the second protrusion is greater than the distance between the third protrusion and the fourth protrusion.

[0013] In a preferred embodiment of the wiper motor testing machine of the present invention: the elastic element includes a housing mounted on a sub-base, and a first elastic body disposed within the housing, the first elastic body being connected to the moving element.

[0014] In a preferred embodiment of the wiper motor testing machine of the present invention, a stabilizing element is further included. The stabilizing element is connected to the torque arm. When the paired torque arms rotate away from each other, the stabilizing element can apply a thrust in the opposite direction of rotation to the torque arm.

[0015] In a preferred embodiment of the wiper motor testing machine of the present invention: the stabilizing component includes a force-applying buckle connected to the torque arm, and a second elastic body abutting against the force-applying buckle; when the paired torque arms rotate away from each other, they can drive the force-applying buckle to press the second elastic body.

[0016] The beneficial effects of this invention are as follows: it adopts a pair of torque arms of torque simulation mechanism to simulate the torque applied to the output shaft of the motor by the wiper during actual use, so that the entire test environment is close to the actual use scenario, and also reduces the area occupied, allowing the test bench to support more motors for simultaneous testing. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention.

[0018] Figure 1 The overall structure diagram of the wiper motor testing machine is shown.

[0019] Figure 2 A schematic diagram showing the positions of the sub-seat and the torque simulation mechanism is provided.

[0020] Figure 3 A schematic diagram of the torsion simulation mechanism is shown.

[0021] Figure 4 A schematic diagram of the structure of the first torque arm and the second torque arm is shown.

[0022] Figure 5 The flowchart of the wiper motor testing machine is shown.

[0023] Figure 6 A detailed structural diagram of the torsion simulation mechanism is shown.

[0024] Figure 7 A schematic diagram of the test shaft and torque simulation mechanism is shown.

[0025] Figure 8 A schematic diagram of the torsion body and slot is shown.

[0026] Figure 9 A schematic diagram of the torsion arm is shown.

[0027] Figure 10 A detailed structural diagram of the stabilizer is shown.

[0028] In the diagram: 100, Test stand; 200, Subsidiary seat; 300, Test shaft; 301, Torque body; 3011, First protrusion; 3012, Second protrusion; 3013, Third protrusion; 3014, Fourth protrusion; 302, Coupling; 303, Synchronizing ring; 400, Moving part; 401, Column; 402, Head; 500, Torque arm; 5001, First torque arm; 5002, Second torque arm. Arm; 501, slot; 502, rotating shaft; 503, synchronous gear; 504, first end; 505, second end; 506, empty area; 600, elastic element; 601, housing; 602, first elastic body; 700, stabilizing element; 701, force-applying buckle; 702, second elastic body; 703, buckle groove; 704, track; 705, guide post; 706, guide block; 707, protruding post. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0030] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0031] Reference Figures 1-10 This embodiment provides a wiper motor testing machine, including a test bench 100. The test bench 100 is the base of the entire device and also provides installation space for the entire device. In the prior art, in order to simulate a wiper, a linkage structure is installed on the test bench 100, but in this wiper testing machine, a linkage structure is not used.

[0032] This testing machine also includes a sub-mount 200, which is mounted on the test bench 100. Because this device uses a smaller structure to simulate the operation of the wiper, more sub-mounts 200 can be installed on the same test bench 100 in this invention. That is, multiple wiper motors can be tested simultaneously on the same test bench 100.

[0033] This testing machine also includes a test shaft 300, which is rotatably mounted on the sub-base 200. The test shaft 300 is provided with a torque body 301, and the wiper motor can be connected to the test shaft 300. Specifically, the bottom end of the test shaft 300 is rotatably connected to the bottom of the sub-base 200 through a bearing, while the top end of the test shaft 300 extends to the top of the sub-base 200. The output shaft of the wiper motor can be directly connected to the test shaft 300. When the output shaft of the motor rotates, it can drive the test shaft 300 to rotate synchronously.

[0034] The auxiliary seat 200 is also equipped with a torque simulation mechanism; the torque simulation mechanism is used to simulate the test environment of the wiper motor, mainly by subjecting it to torque in different directions during the same rotation stroke.

[0035] The torque simulation mechanism includes a movable component 400, a torque arm 500, and an elastic component 600. The movable component 400 can slide relative to the test shaft 300. The torque arms 500 are arranged in pairs and connected to the movable component 400. The paired torque arms 500 can rotate synchronously in opposite directions. The elastic component 600 can apply a thrust to the movable component 400. The paired torque arms 500 are provided with slots 501. The torque body 301 is located inside the slots 501. For each rotation of the test shaft 300, the two paired torque arms 500 can apply thrusts in different directions to the test shaft 300.

[0036] We divide the two torque arms 500, which are set in pairs, into two regions, with the axis of the test shaft 300 as the boundary. The two torque arms 500 are labeled as the first torque arm 5001 and the second torque arm 5002, respectively. The slots 501 on the first torque arm 5001 and the second torque arm 5002 are in corresponding positions, and the end of the first torque arm 5001 abuts against the end of the second torque arm 5002.

[0037] For motor testing, please refer to... Figure 5 When the motor rotates counterclockwise in the direction of the paper, it drives the test shaft 300 to rotate counterclockwise. During this process, the torque body 301, fixedly mounted on the test shaft 300, pushes the first torque arm 5001 due to the counterclockwise rotation. Because the position of the torque body 301 changes in the X direction, it drives the first torque arm 5001 to push the moving part 400 towards the elastic member 600. During this process, the elastic member 600 is pressed by the moving part 400, thus generating a reverse elastic force applied to the moving part 400. Therefore, the moving part 400, through the first torque arm 5001, applies a torque in the opposite direction of rotation to the torque body 301, and consequently to the test shaft 300 and the output shaft of the motor. This simulates the torque experienced by the wiper motor when it pushes the linkage to rotate the wiper upwards in actual use. Figure 4 For example, the X direction refers to the direction in which the dotted line extends.

[0038] When the motor drives the test shaft 300 to rotate half a turn, the first torque arm 5001 and the second torque arm 5002 abut against each other on the other side of the test shaft 300. At this time, the motor continues to drive the test shaft 300 to rotate counterclockwise, which will cause the torque body 301 to constrain the second torque arm 5002 to start moving in the opposite direction of the X direction. At this time, due to the elastic force of the elastic element 600, the second torque arm 5002 can apply a rotational thrust to the torque body 301 and then to the test shaft 300 and the motor output shaft, thereby simulating the torque applied to the motor assembly through the linkage when the wiper rotates and descends in actual use, until the motor completes one rotation stroke.

[0039] Therefore, in this technical solution, a pair of torque arms 500 of torque simulation mechanism are used to simulate the torque applied to the output shaft of the motor by the wiper during actual use. This makes the entire test environment fit the actual use scenario, reduces the area occupied, and allows the test bench 100 to support more motors for simultaneous testing.

[0040] The test shaft 300 has a coupling 302 installed at the top end of the auxiliary seat 200 after passing through the top end of the test shaft 300. The output shaft of the motor is connected to the entire test shaft 300 through the coupling 302. Therefore, when the motor rotates, it can drive the entire test shaft 300 to rotate synchronously. A synchronizing ring 303 is installed on the radial outer wall of the test shaft 300, and the entire torque body 301 is installed on the synchronizing ring 303.

[0041] Specifically, in this embodiment, the torsion body 301 adopts a diamond-like structure, but the four protrusions of the torsion body 301 are rounded. The four protrusions of the torsion body 301 are respectively labeled as the first protrusion 3011, the second protrusion 3012, the third protrusion 3013, and the fourth protrusion 3014. The distance between the first protrusion 3011 and the second protrusion 3012 is greater than the distance between the third protrusion 3013 and the fourth protrusion 3014.

[0042] In the initial state, the first protrusion 3011 and the second protrusion 3012 are located inside the slots 501 of the first torque arm 5001 and the second torque arm 5002, respectively. It should be noted that the gap between the first protrusion 3011 and the second protrusion 3012 is at least less than the maximum width of the slot 501. In this embodiment, the width of the opening of the slot 501 is the largest, and the width of the entire slot 501 gradually decreases from the opening to the bottom of the slot.

[0043] Because the gap between the first protrusion 3011 and the second protrusion 3012 is less than the maximum width of the slot 501, it can be ensured that the test shaft 300 can still remain inside the slot 501 when it rotates 90 degrees. Through the design of the slot 501 and the shape of the torque body 301, a gap exists between the torque body 301 and the slot 501. Therefore, when the torque body 301 pushes one of the torque arms 500 to rotate, the torque body 301 can more smoothly disengage from the slot 501 of the other torque arm 500 that rotates in the opposite direction, thus making the rotation of the entire test shaft 300 smoother.

[0044] As an optional embodiment, the entire moving member 400 consists of two parts, namely a column 401 and a head 402. The column 401 is used to connect with the elastic member 600 and to install the elastic member 600 during movement. The head 402 is used to connect with the torque arm 500. At least two rotating shafts 502 are installed on the head 402, and the two torque arms 500 are respectively installed on the head 402 through the two rotating shafts 502.

[0045] In order to enable the two torque arms 500 to rotate in opposite directions, a synchronizing gear 503 is installed on both rotating shafts 502. That is, the two torque arms 500 are connected to the synchronizing gears 503 on the two rotating shafts 502, and the synchronizing gears 503 of the two torque arms 500 mesh. When one torque arm 500 rotates, its synchronizing gear 503 can drive the synchronizing gear 503 of the other torque arm 500 to rotate in the opposite direction, so that the two torque arms 500 can rotate counterclockwise synchronously. Therefore, no matter which torque arm 500 is pushed to rotate by the torque body 301, the other torque arm 500 can also move synchronously, so that it can bypass the test shaft 300 when moving, and there will be no contact or interference with the test shaft 300.

[0046] To avoid interference between the torque arm 500 and the test shaft 300, the torque arm 500 in this technical solution adopts a U-shaped rod structure, that is, the torque arm 500 has two ends, namely the first end 504 and the second end 505. When the first ends 504 of the two torque arms 500 touch each other, a gap area 506 is formed between the two torque arms 500, and the test shaft 300 is located inside the gap area 506. This can avoid interference between the torque arm 500 and the test shaft 300.

[0047] When the torque body 301 pushes the torque arm 500 to rotate, whether it pushes the first torque arm 5001 to rotate or the second torque arm 5002 to rotate, the torque arm 500 rotates away from the test axis 300 with its rotation axis 502 as the axis. At the same time, the other torque arm 500 naturally rotates away from the test axis 300 around its own rotation axis 502. Therefore, the torque arm 500 will not interfere with the test axis 300 when it rotates.

[0048] The first end 504 of the torque arm 500 is the location where the slot 501 is opened, and the second end 505 of the torque arm 500 is connected to the rotating shaft 502. Therefore, the second end 505 of the torque arm 500 is connected to the moving part 400 through the rotating shaft 502.

[0049] The elastic element 600 includes a housing 601 mounted on the sub-base 200 and a first elastic body 602 disposed within the housing 601. The first elastic body 602 abuts against the moving element 400. The housing 601 is a tubular structure with a connector at the bottom. The entire housing 601 is fixed to the sub-base 200 via the connector, thus stabilizing the position of the housing 601. Because it is a tubular structure, it has a cavity inside. The first elastic body 602 is a spring and is disposed inside the cavity. The column portion 401 of the moving element 400 extends into the cavity and abuts against the first elastic body 602. When the column portion 401 moves in the X direction, it presses the first elastic body 602, causing the first elastic body 602 to deform. Therefore, the column portion 401 receives a reaction force, and this force is applied to the torque body 301 through the head 402 of the moving element 400, and then to the test shaft 300 and the output shaft of the motor.

[0050] To make the connection between the column 401 and the housing 601 more stable, the column 401 and the housing 601 can be connected by a sliding block structure. In addition, the sliding block structure can also limit the stroke of the column 401, so that the moving part 400 can only move within a limited area.

[0051] In another embodiment of the present invention, the entire testing machine further includes a stabilizer 700, which is connected to a torque arm 500. When the paired torque arms 500 rotate away from each other, the stabilizer 700 can apply a thrust in the opposite direction of rotation to the torque arms 500.

[0052] Specifically, the stabilizer 700 includes a force-applying buckle 701 connected to the torque arm 500, and a second elastic body 702 that abuts against the force-applying buckle 701; when the paired torque arms 500 rotate away from each other, they can drive the force-applying buckle 701 to press the second elastic body 702.

[0053] The force-applying buckle 701 has a buckle groove 703. A track 704 is installed at the head 402 of the moving part 400. In this embodiment, a guide post 705 is provided on the track 704. The second elastic body 702 is a spring and is sleeved on the outside of the guide post 705. A sliding guide block 706 is also sleeved on the outside of the guide post 705. A vertically arranged protrusion 707 is installed on the guide block 706. The protrusion 707 passes through the buckle groove 703. Two stabilizing members 700 are installed at the head 402 of the moving part 400. They are connected to the first torque arm 5001 and the second torque arm 5002 respectively. When the torque arm 500 rotates away from the test axis 300, it can drive the rotating axis 502 to rotate synchronously, thus driving the force-applying buckle 701 to rotate synchronously.

[0054] The rotation of the force-applying buckle 701 pushes the protrusion 707 and the guide block 706, causing the guide block 706 to slide on the guide post 705 and squeeze the second elastic body 702. This causes the second elastic body 702 to deform. The deformation of the second elastic body 702 provides a reaction force to the guide block 706 and the force-applying buckle 701, which can constrain the torque arm 500, causing the torque arm 500 to press against the torque body 301. This prevents the torque body 301 from detaching from the slot 501 on the torque arm 500, thus making the torque body 301 more stable when pushing the torque arm 500.

[0055] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A wiper motor testing machine, characterized in that: include, Test stand (100); Subsidiary seat (200), which is mounted on the test stand (100); A test shaft (300) is rotatably mounted on the sub-base (200), and a torque body (301) is provided on the test shaft (300). A wiper motor can be connected to the test shaft (300). A torque simulation mechanism is also installed on the sub-seat (200); The torque simulation mechanism includes a movable component (400), a torque arm (500), and an elastic component (600). The movable component (400) can slide relative to the test shaft (300). The torque arms (500) are arranged in pairs and connected to the movable component (400). The paired torque arms (500) can rotate synchronously in opposite directions. The elastic component (600) can apply a thrust to the movable component (400). The paired torque arms (500) have slots (501) and the torque body (301) is located inside the slots (501). For each rotation of the test shaft (300), the two paired torque arms (500) can apply thrust in different directions to the test shaft (300).

2. The wiper motor testing machine according to claim 1, characterized in that: A coupling (302) is installed on the test shaft (300), and the wiper motor is connected to the test shaft (300) through the coupling (302).

3. The wiper motor testing machine according to claim 1, characterized in that: A synchronization ring (303) is coaxially arranged on the test shaft (300), and the torque body (301) is mounted on the synchronization ring (303).

4. The wiper motor testing machine according to claim 1, characterized in that: The movable member (400) includes a column (401) connected to the elastic member (600) and a head (402) connected to the torque arm (500). The torque arm (500) is rotatably mounted on the head (402) via a rotating shaft (502).

5. The wiper motor testing machine according to claim 4, characterized in that: The paired torque arms (500) are each equipped with a synchronizing gear (503) via a rotating shaft (502), and the synchronizing gears (503) mounted on the paired torque arms (500) mesh with each other.

6. The wiper motor testing machine according to claim 1, characterized in that: The torque arm (500) has a first end (504) and a second end (505), and the torque arm (500) has a gap (506) between the first end (504) and the second end (505); The test axis (300) is located within the vacancy area (506); The slot (501) is located at the first end (504), and the second end (505) of the torque arm (500) is connected to the moving part (400).

7. The wiper motor testing machine according to claim 1, characterized in that: The torsion body (301) has four protrusions, including a first protrusion (3011), a second protrusion (3012), a third protrusion (3013), and a fourth protrusion (3014). The distance between the first protrusion (3011) and the second protrusion (3012) is greater than the distance between the third protrusion (3013) and the fourth protrusion (3014).

8. The wiper motor testing machine according to claim 1, characterized in that: The elastic element (600) includes a housing (601) mounted on the sub-base (200) and a first elastic body (602) disposed within the housing (601), the first elastic body (602) abutting against the moving element (400).

9. The wiper motor testing machine according to claim 1, characterized in that: It also includes a stabilizer (700) connected to a torque arm (500). When the paired torque arms (500) rotate away from each other, the stabilizer (700) can apply a thrust in the opposite direction of rotation to the torque arms (500).

10. The wiper motor testing machine according to claim 9, characterized in that: The stabilizer (700) includes a force-applying buckle (701) connected to the torque arm (500) and a second elastic body (702) abutting against the force-applying buckle (701). When the paired torsion arms (500) rotate away from each other, they can drive the force-applying buckle (701) to press the second elastic body (702).

Images