Test tool for detecting durability of displacement sensor

Abstract

The utility model relates to a test tool. A testing tool for detecting durability of a displacement sensor comprises a workbench, a support is arranged on the workbench, a sensor mounting plate and a pusher dog fixing plate which move relatively are mounted on the support, a driving structure is arranged below the pusher dog fixing plate, and the driving structure drives the pusher dog fixing plate to move. A sensor is mounted on the sensor mounting plate, a pusher dog on the pusher dog fixing plate drives a magnet on the sensor to move relative to the sensor, and a mounting surface positioning structure is arranged between the sensor mounting plate and the pusher dog fixing plate. The utility model provides the test tool for detecting the durability of the displacement sensor, which can effectively realize the durability test of the sensor, and is simple in structure and convenient to operate; the technical problem that the durability test of the displacement sensor cannot be realized in the prior art is solved.

Description

Technical Field

[0001] This utility model relates to a testing fixture, and more particularly to a testing fixture for detecting the durability of a displacement sensor. Background Technology

[0002] The gear position sensor is an important component of the automotive transmission system. It can control the corresponding gear position of the transmission in a gasoline car or the reducer in a new energy vehicle.

[0003] With the development of automobiles, the requirements for the lifespan and durability of gear position sensors are becoming increasingly stringent. Most automotive companies require gear position sensors to withstand 500,000 cycles or higher during testing. This necessitates the development of testing fixtures for the linear or rotary motion of gear position sensors to meet these testing requirements. Summary of the Invention

[0004] This invention provides a simple and easy-to-operate testing fixture for detecting the durability of displacement sensors, which can effectively perform durability testing on sensors; it solves the technical problem that existing technologies cannot perform durability testing on displacement sensors.

[0005] The above-mentioned technical problem of this utility model is solved by the following technical solution: A testing fixture for detecting the durability of a displacement sensor includes a worktable, a support on the worktable, a sensor mounting plate and a claw fixing plate that move relative to each other mounted on the support, a driving structure below the claw fixing plate, the driving structure driving the claw fixing plate to move, a sensor mounted on the sensor mounting plate, and a claw on the claw fixing plate driving the magnet on the sensor to move relative to the sensor, and a mounting surface positioning structure between the sensor mounting plate and the claw fixing plate. The mounting surface positioning structure allows the sensor and magnet to be aligned with a zero reference plane, facilitating subsequent monitoring of the distance between the magnet and the sensor body. The driving structure drives the claw fixing plate to move, thereby driving the magnet to move relative to the sensor, and the driving structure controls the magnet to reciprocate 500,000 times or more, thereby testing the durability of the sensor.

[0006] Preferably, the sensor mounting plate has multiple parallel mounting slots, and a sensor fixing plate is provided above the sensor mounting plate. The sensor fixing plate has a sensor positioning structure and a sensor fixing structure. The multiple mounting slots allow for simultaneous testing of multiple sensors, which are then fixed in place by the sensor fixing plate. The mounting slots are also suitable for mounting different types of sensors, improving the versatility of the tooling.

[0007] Preferably, the sensor mounting plate has a positioning hole and a fixing hole, the sensor has a positioning pin that cooperates with the positioning hole, and the sensor also has a through hole corresponding to the fixing hole. A fixing member is inserted into the through hole to fix the sensor to the sensor mounting plate.

[0008] Preferably, the drive structure includes a drive motor that drives a lead screw to rotate. A sleeve is mounted on the lead screw, and a first vertical plate is fixed to the sleeve. A second vertical plate is connected to the first vertical plate and is fixed to a pawl fixing plate. The lead screw and sleeve structure is simple, convenient to operate and control. The motor drives the lead screw to rotate, which in turn causes the sleeve to move axially on the lead screw, thereby driving the movement of the second vertical plate. The second vertical plate drives the pawl fixing plate, which in turn drives the movement of the magnet relative to the sensor.

[0009] Preferably, a position sensor is provided on the worktable, located on one side of the drive structure. The position sensor identifies the stroke, precisely controlling the maximum limit displacement of the sensor and ensuring the accuracy of the test.

[0010] Preferably, guide rail seats are provided on both sides of the claw fixing plate, and a guide rail is provided below the sensor mounting plate. The claw fixing plate and the sensor mounting plate achieve relative movement by sliding within the guide rail seats.

[0011] Preferably, a magnet block is provided below the sensor, and a magnet slot is provided on the magnet block, with the claw located in the magnet slot.

[0012] Preferably, the mounting surface positioning structure includes a first positioning hole in the sensor mounting plate and a corresponding second positioning hole in the claw fixing plate. A pin is inserted into the first and second positioning holes to ensure the relative position between the sensor mounting plate and the claw fixing plate. The position of the claw determines the position of the magnet, thereby ensuring that the center of the magnet and the mounting plane of the sensor are on the same plane, achieving the same reference zero position.

[0013] Therefore, the testing fixture for detecting the durability of displacement sensors of this utility model has the following advantages: it uses a motor screw structure to drive the magnet to move relative to the sensor, thereby realizing the test of sensor durability; the mounting surface positioning structure can determine the zero reference for the relative position of the sensor and the magnet, and at the same time, it uses a position sensor to determine the maximum displacement, making the experimental data of the testing fixture more reliable. Attached Figure Description

[0014] Figure 1 This is a three-dimensional view of a test fixture for detecting the durability of a displacement sensor.

[0015] Figure 2 yes Figure 1 A 3D view of the sensor mounting plate removed.

[0016] Figure 3 yes Figure 1 A 3D view of the sensor mounting plate.

[0017] Figure 4 yes Figure 1 A 3D view of the sensor.

[0018] Figure 5 yes Figure 4 Side view. Detailed Implementation

[0019] The technical solution of the utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0020] Example:

[0021] like Figure 1 and 2 As shown, a testing fixture for detecting the durability of a displacement sensor includes a worktable 1, a support 2 mounted on the worktable 1, and a sensor mounting plate 3 and a claw fixing plate 4 fixed on the support 2, which move relative to each other. Both the sensor mounting plate 3 and the claw fixing plate 4 are rectangular. Guide rails 17 are fixed at both ends of the sensor mounting plate 3 near the support, and guide rail seats 18 are fixed at both ends of the claw fixing plate 4 near the support. The sensor mounting plate 3 and the claw fixing plate 4 can move relative to each other through the cooperation of the guide rails 17 and the guide rail seats 18.

[0022] The sensor mounting plate 3 has multiple parallel mounting slots 5, which can accommodate various sensors 8 depending on the sensor model. The sensor mounting plate 3 also has two first positioning holes 7, and the claw fixing plate 4 has second positioning holes 6 corresponding to the first positioning holes 7. After the sensor mounting plate 3 is installed, pins are installed in the first positioning holes 7 and the second positioning holes 6 to ensure the initial positions of the sensor mounting plate and the claw fixing plate, thereby ensuring the alignment of the zero reference plane A of the sensor and the magnet. The claw fixing plate 4 has a number of claws 16 equal to the number of mounting slots on the sensor mounting plate.

[0023] like Figure 3 and 4 As shown, a sensor mounting plate 9 is fixed on the sensor mounting plate 3. The sensor mounting plate 9 is perpendicular to the sensor mounting plate 3. The sensor mounting plate 9 has a positioning hole 19 and a fixing hole 20. The sensor 8 has a positioning pin 22 that cooperates with the positioning hole. The sensor 8 also has a through hole corresponding to the fixing hole. A bolt 23 is inserted into the through hole to fix the sensor on the sensor mounting plate.

[0024] A drive structure is installed below the pawl fixing plate 4. The drive structure includes a drive motor 10, which is connected to a lead screw 14. A sleeve 25 is sleeved on the lead screw 14, and a first upright plate 11 is fixed on the sleeve 25. A second upright plate 12 is connected above the first upright plate 11, and the other end of the second upright plate 12 is fixed to the pawl fixing plate 4. A position sensor 13 is also installed on the worktable 1. The position sensor 13 is located on one side of the lead screw 14. The movement of the sleeve 25 on the lead screw 14 can be detected by the position sensor 13, thereby determining the limit distance of the movement of the second upright plate 12, which is also the limit distance of the movement of the magnet 15.

[0025] like Figure 4 As shown, magnet 15 is located below sensor 8. Magnet 15 moves relative to the sensor via a slide rail. A magnet slot 21 is provided on the magnet block, and claw 16 is located within the magnet slot 21. The zero reference plane refers to the plane at the center of the magnet slot being in the same plane as the sensor mounting surface, such as... Figure 5 As shown in plane A.

[0026] In use, the sensor mounting plate and the claw fixing plate are first slidably connected together via the guide rail and guide rail seat. Then, the drive motor drives the claw fixing plate to move until the center lines of the first and second positioning holes coincide. Insert the pin to complete the alignment of the zero reference plane. At this point, fix the sensor on the sensor mounting plate. Turn on the drive motor to drive the claw to move back and forth 500,000 times or more, thereby completing the durability test of the sensor.

[0027] The specific embodiments described herein are merely illustrative of the concept of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A testing fixture for detecting the durability of a displacement sensor, comprising a worktable, characterized in that: A support is provided on the workbench, on which a sensor mounting plate and a claw fixing plate that move relative to each other are mounted. A drive structure is provided below the claw fixing plate, which drives the claw fixing plate to move. A sensor is mounted on the sensor mounting plate, and the claw on the claw fixing plate drives the magnet on the sensor to move relative to the sensor. A mounting surface positioning structure is provided between the sensor mounting plate and the claw fixing plate.

2. The testing fixture for detecting the durability of a displacement sensor according to claim 1, characterized in that: The sensor mounting plate is provided with multiple parallel mounting slots, and a sensor fixing plate is provided above the sensor mounting plate. The sensor fixing plate is provided with a sensor positioning structure and a sensor fixing structure.

3. The testing fixture for detecting the durability of a displacement sensor according to claim 2, characterized in that: The sensor mounting plate has positioning holes and fixing holes. The sensor has positioning pins that cooperate with the positioning holes. The sensor also has through holes that correspond to the fixing holes. A fixing member is inserted into the through holes to fix the sensor to the sensor mounting plate.

4. A testing fixture for detecting the durability of a displacement sensor according to claim 1, 2, or 3, characterized in that: The drive structure includes a drive motor that drives a lead screw to rotate. A sleeve is mounted on the lead screw, and a first vertical plate is fixed on the sleeve. A second vertical plate is connected to the first vertical plate, and the second vertical plate is fixed on a pawl fixing plate.

5. A testing fixture for detecting the durability of a displacement sensor according to claim 1, 2, or 3, characterized in that: The workbench is equipped with a position sensor, which is located on one side of the drive structure.

6. The testing fixture for detecting the durability of a displacement sensor according to claim 1, 2, or 3, characterized in that: Guide rail seats are provided on both sides of the claw fixing plate, and a guide rail is provided below the sensor mounting plate. The claw fixing plate and the sensor mounting plate achieve relative movement by sliding within the guide rail seats.

7. The testing fixture for detecting the durability of a displacement sensor according to claim 1, 2, or 3, characterized in that: The sensor has a magnet block below it, and a magnet slot is formed on the magnet block. The claw is located in the magnet slot.

8. A testing fixture for detecting the durability of a displacement sensor according to claim 1, 2, or 3, characterized in that: The mounting surface positioning structure includes a first positioning hole in the sensor mounting plate and a corresponding second positioning hole in the claw fixing plate.

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