Sensor test fixture

Abstract

The invention relates to the technical field of test fixtures, and discloses a sensor test fixture which comprises a workbench and a clamping plate, a round hole is formed in the middle of the clamping plate, limiting blocks are slidably connected to the middles of the left end and the right end of the clamping plate, and pull rods penetrate through the four corners of the clamping plate. An electric push rod is fixedly installed in the middle of the rear end of the workbench, the telescopic end of the rear end of the electric push rod is fixedly connected with a push plate, four sets of first square grooves distributed in a rectangular array are formed in the push plate, barrier strips are installed at the positions, corresponding to the first square grooves, of the rear end of the push plate, and connecting rods are fixedly connected to the middles of the front ends of the barrier strips. The connecting rods and the pull rods are connected in the mode that pins penetrate through the U-shaped connectors. The device is wide in adaptation range, the clamping posture of the sensor can be well guaranteed, parts are convenient to disassemble, assemble and replace, the production, use and replacement cost is reduced, the use flexibility of the device is improved, and the operation experience of a user is improved.

Description

Technical Field

[0001] This invention relates to the field of test fixture technology, and more particularly to a sensor test fixture. Background Technology

[0002] In the sensor production and testing process, fixtures are often used to position and hold the sensors to ensure the smooth conduct of testing and the accuracy of test results. Currently, there are many types of sensors on the market, among which cylindrical sensors with hexagonal screw designs are widely used. However, existing test fixtures are mostly designed for specific purposes and can only be used with sensors of specific sizes or models, resulting in a relatively narrow range of compatibility.

[0003] Some fixtures have difficulty maintaining a stable horizontal position for the sensor during clamping, which may affect the accuracy of subsequent tests. Furthermore, when adapting to sensors of different sizes, the existing fixtures' clamp plate replacement process is cumbersome, with some connection structures being complex and time-consuming to disassemble and assemble. In addition, some fixture components have poor versatility, requiring dedicated connectors for different clamp plate specifications, which not only increases usage and replacement costs but may also reduce the flexibility of the device and negatively impact the user experience. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a sensor testing fixture to solve some of the problems mentioned in the background section.

[0005] This invention provides the following technical solution: a sensor testing fixture, comprising a workbench and a clamping plate. A circular hole is provided in the middle of the clamping plate. Limiting blocks are slidably connected to the middle of both the left and right ends of the clamping plate. Pull rods penetrate through the four corners of the clamping plate. An electric push rod is fixedly installed at the middle of the rear end of the workbench. A push plate is fixedly connected to the telescopic end of the rear end of the electric push rod. Four sets of rectangularly arranged square slots are provided on the push plate. A stop bar is installed at a corresponding square slot at the rear end of the push plate. A connecting rod is fixedly connected to the middle of the front end of each stop bar. A second square slot is provided on the workbench at a corresponding square slot. The front end of each connecting rod penetrates through the second square slot and is provided with a U-shaped connector. A pin penetrates through the rear end of each pull rod. The connecting rod and the pull rod are connected by the pin and the U-shaped connector.

[0006] Furthermore, L-shaped guide rails are symmetrically installed in the middle of the worktable, and slide tables are slidably installed at both the front and rear ends of the L-shaped guide rails. The slide tables can slide, which facilitates the adjustment of their positions to match the sensors. At the same time, the L-shaped guide rails provide limiting support for the slide tables.

[0007] Furthermore, a fixing block is symmetrically installed on the upper end of the front slide, the lower end of the clamping plate is locked between the two sets of clamping plates, a pin passes through the middle of the fixing block, and the pin passes through the middle of the lower end of the clamping plate. A wire groove is provided in the middle of the rear slide. The design of the wire groove fully considers the shape design of mainstream sensors and avoids the influence of the rear wires in this fixture.

[0008] Furthermore, guide rods are slidably connected through and at each of the four corners of the push plate. The front ends of the guide rods are fixedly connected to the worktable. The guide rods support the push plate and ensure its normal movement and verticality.

[0009] Furthermore, each of the pull rods is provided with a variable diameter rod head at its front end, which is used to match the through holes at the four corners of the clamp plate to create a limiting relationship.

[0010] The effects of this invention are as follows: 1. With a wide range of compatibility and excellent clamping stability, this fixture helps ensure the accuracy of subsequent tests. It can clamp various types of cylindrical sensors with hexagonal screw designs through the cooperation of the limit block and the rear slide, without the need for separate design for a single specification. At the same time, it can keep the sensor stable in a horizontal position, reducing the adverse effects of clamping posture deviation on the test.

[0011] 2. Easy to disassemble and replace, highly versatile and cost-controllable. The clamp plate can be replaced by simply disassembling and assembling the pins and dowels. With the design of the variable diameter rod head on the pull rod, it can adapt to the installation requirements of clamp plates of different sizes. No special connecting parts are required. The structure adopted is mostly conventional, which not only reduces the production, use and replacement costs, but also improves the flexibility of the device and enhances the user's operating experience. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the rear structure of the present invention; Figure 3 This is a partial structural diagram of the present invention; Figure 4 This is a side view of the structure of the present invention.

[0013] In the diagram: 1. Workbench; 2. Clamping plate; 3. Round hole; 4. Limiting block; 5. L-shaped guide rail; 6. Slide table; 7. Fixing block; 8. Pin; 9. Wire groove; 10. Pull rod; 11. Electric push rod; 12. Push plate; 13. Guide rod; 14. Square groove one; 15. Stop bar; 16. Connecting rod; 17. Square groove two; 18. U-shaped joint; 19. Pin; 20. Variable diameter rod head. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0015] Please see Figures 1-4 A sensor testing fixture includes a workbench 1 and a clamping plate 2. A circular hole 3 is provided in the middle of the clamping plate 2. Limiting blocks 4 are slidably connected to the middle of the left and right ends of the clamping plate 2. Pull rods 10 are passed through the four corners of the clamping plate 2. An electric push rod 11 is fixedly installed in the middle of the rear end of the workbench 1. A push plate 12 is fixedly connected to the telescopic end of the rear end of the electric push rod 11. The push plate 12 has four sets of square slots 14 arranged in a rectangular array. A stop bar 15 is installed at the rear end of the push plate 12 at the corresponding square slot 14. A connecting rod 16 is fixedly connected to the middle of the front end of the stop bar 15. A square slot 17 is provided in the workbench 1 at the corresponding square slot 14. The front end of the connecting rod 16 passes through the square slot 17 and is provided with a U-shaped connector 18. A pin 19 passes through the rear end of the pull rod 10. The connecting rod 16 and the pull rod 10 are connected by the pin 19 and the U-shaped connector 18. The sensor is passed through the circular hole 3 on the clamping plate 2 and pressed against the rear slide 6. The wire connected to the rear end of the sensor is tucked into the wire groove 9 so that its rear end can fit against the slide 6, thus making the sensor vertical on the rear slide 6 and keeping it horizontal. By moving the limiting block 4 and blocking the front end of the hexagonal screw on the sensor, the electric push rod 11 is opened so that its telescopic end drives the push plate 12 to move backward. The backward movement of the push plate 12 causes the stop bar 15 to drive the connecting rod 16 to pull the pull rod 10 backward, thereby moving the clamping plate 2 backward. Then, through the abutment of the limiting block 4 and the hexagonal screw on the sensor, together with the rear slide 6, the sensor is clamped and fixed. Compared with traditional clamps, this test clamp can clamp any cylindrical sensor with hexagonal screw design on the market, with a wider range of applications, while ensuring the sensor is horizontal, which is convenient for subsequent testing.

[0016] Please see Figures 1-4 On the workbench 1, L-shaped guide rails 5 are symmetrically installed in the middle. Slide tables 6 are slidably installed at the front and rear ends of the L-shaped guide rails 5. Fixing blocks 7 are symmetrically installed on the upper end of the front slide table 6. The lower end of the clamping plate 2 is stuck between the two sets of clamping plates 2. A pin 8 passes through the middle of the fixing block 7. The pin 8 passes through the middle of the lower end of the clamping plate 2. A wire groove 9 is provided in the middle of the rear slide table 6. Guide rods 13 are slidably connected through the four corners of the push plate 12. The front ends of the guide rods 13 are fixedly connected to the workbench 1. A variable diameter rod head 20 is provided at the front end of the pull rod 10. In the operation of matching sensors of different sizes, the clamping plate 2 can be directly replaced by removing the pin 8, so that the design of the round hole 3, which is more suitable for the actual sensor size, can be selected. Correspondingly, the connection between the pull rod 10 and the connecting rod 16 can be released by pulling out the pin 19, which also facilitates the installation of the pull rod 10 and the new clamping plate 2. The design of the variable diameter rod head 20 on the pull rod 10 not only serves as a limit, but also can be used for the through hole sizes at the four corners of the clamping plate 2 of different sizes. The structure is simple and all are conventional structures, which reduces the cost of use and replacement, and is easy to disassemble and assemble, which greatly improves the flexibility of the device in use and enhances the user experience.

[0017] Working principle: In use, the sensor is passed through the round hole 3 on the clamping plate 2 and pressed against the rear slide 6. The wire connected to the rear end of the sensor is tucked into the wire groove 9 so that its rear end can fit against the slide 6, thus keeping the sensor vertical on the rear slide 6 and horizontal. By moving the limiting block 4 and blocking the front end of the hexagonal screw on the sensor, and simultaneously opening the electric push rod 11, its telescopic end drives the push plate 12 to move backward. The backward movement of the push plate 12 causes the stop bar 15 to drive the connecting rod 16 to pull the pull rod 10 backward, thereby moving the clamping plate 2 backward. Then, through the abutment of the limiting block 4 and the hexagonal screw on the sensor, together with the rear slide 6, the sensor is clamped and fixed. Compared with traditional clamps, this test clamp can handle any cylindrical shape with hexagonal screw design on the market. The clamping mechanism for the sensor has a wider range of applications and ensures the sensor's horizontal position, facilitating subsequent testing. Furthermore, when matching sensors of different sizes, the clamping plate 2 can be directly replaced by removing the pin 8, allowing for the selection of a more suitable round hole 3 design for the actual sensor size. Correspondingly, the connection between the pull rod 10 and the connecting rod 16 can be released by pulling out the pin 19, thus facilitating the installation of the pull rod 10 and the new clamping plate 2. The design of the variable diameter rod head 20 on the pull rod 10 not only serves as a limit but also accommodates the through hole sizes at the four corners of the clamping plate 2 of different sizes. The structure is simple and uses conventional structures, reducing usage and replacement costs. It is also easy to assemble and disassemble, greatly improving the flexibility of the device during use and enhancing the user experience.

Claims

1. A sensor testing fixture, comprising a worktable (1) and a clamping plate (2), characterized in that: A circular hole (3) is provided in the middle of the clamping plate (2). Limiting blocks (4) are slidably connected to the middle of the left and right ends of the clamping plate (2). Pull rods (10) are passed through the four corners of the clamping plate (2). An electric push rod (11) is fixedly installed in the middle of the rear end of the workbench (1). A push plate (12) is fixedly connected to the telescopic end of the rear end of the electric push rod (11). Four sets of square slots (14) arranged in a rectangular array are opened on the push plate (12). The rear end of the push plate (12) is located in the corresponding square slot (14). A stop bar (15) is installed at each of the 14 locations. A connecting rod (16) is fixedly connected to the middle of the front end of each stop bar (15). A square groove (17) is provided at each of the corresponding square grooves (14) on the workbench (1). The front end of each connecting rod (16) passes through the square groove (17) and is provided with a U-shaped connector (18). A pin (19) passes through the rear end of each pull rod (10). The connecting rod (16) and the pull rod (10) are connected by the pin (19) passing through the U-shaped connector (18).

2. The sensor testing fixture according to claim 1, characterized in that: The workbench (1) is symmetrically equipped with L-shaped guide rails (5) in the middle, and slide tables (6) are slidably installed at the front and rear ends of the L-shaped guide rails (5).

3. A sensor testing fixture according to claim 2, characterized in that: A fixing block (7) is symmetrically installed on the upper end of the front slide (6). The lower end of the clamping plate (2) is stuck between the two sets of clamping plates (2). A pin (8) passes through the middle of the fixing block (7). The pin (8) passes through the middle of the lower end of the clamping plate (2). A wire groove (9) is provided in the middle of the rear slide (6).

4. A sensor testing fixture according to claim 1, characterized in that: The push plate (12) has guide rods (13) that are slidably connected through each of its four corners, and the front ends of the guide rods (13) are fixedly connected to the worktable (1).

5. A sensor testing fixture according to claim 1, characterized in that: Each of the tie rods (10) is provided with a variable diameter rod head (20) at its front end.

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