Fixture for filter test

Abstract

The utility model relates to a jig for filter testing, which comprises a base, two opposite sides of the top end of the base are correspondingly provided with a first vertical plate and a second vertical plate, the first vertical plate is provided with a vertical plate through hole, a sliding rod is arranged in the vertical plate through hole in a sliding manner, and one end, close to the center of the base, of the sliding rod is provided with a clamping plate. A third vertical plate is arranged at the end, away from the center of the base, of the sliding rod, a spring is arranged between the first vertical plate and the third vertical plate or between the first vertical plate and the clamping plate, a cavity is formed in the base, a vertical rod inserted into the cavity is arranged on the first vertical plate, and a driving mechanism for driving the vertical rod to slide in the axis direction of the sliding rod is arranged in the cavity. A strip-shaped through hole for avoiding sliding of the vertical rod is formed in the top end of the base, the first vertical plate is made to move through the driving mechanism, so that the clamping force provided by the spring is adjusted, the filter is prevented from being crushed, or the situation that clamping of the filter becomes loose due to the fact that the elastic force becomes small after the spring is used for a long time is prevented.

Description

Technical Field

[0001] The utility model relates to the field of filters, and more specifically, to a fixture for filter testing. Background Art

[0002] A filter, as the name implies, is a device for filtering waves. A filter can effectively filter out specific frequency points in the power line or frequencies outside that frequency point, obtaining a power signal with a specific frequency or eliminating a power signal after a specific frequency. During the production process of filters, it is necessary to test the filters to ensure the quality of the filters.

[0003] When conducting contact testing on filters, it is necessary to use a fixture to fix the filters to prevent positional deviation during testing, which may affect the test accuracy of the filters. However, the existing fixtures for filter testing cannot adjust the clamping force for clamping the filters, and are likely to crush the filters. For some fixtures that provide clamping force through springs, after long-term use, the clamping force provided by the springs will decrease, and they cannot adjust the clamping force provided by the springs, which will cause the clamped filters to become loose. Summary of the Utility Model

[0004] Aiming at the above-mentioned defects of the prior art, a fixture for filter testing is provided.

[0005] The technical solution adopted by the utility model to solve its technical problems is: A fixture for filter testing, including a base. On opposite sides of the top of the base, a first vertical plate and a second vertical plate are correspondingly arranged. A vertical plate through hole is provided on the first vertical plate; A sliding rod is slidably arranged in the vertical plate through hole. One end of the sliding rod close to the center of the base is provided with a clamping plate, and the other end of the sliding rod far from the center of the base is provided with a third vertical plate. A spring is arranged between the first vertical plate and the third vertical plate or between the first vertical plate and the clamping plate. A cavity is arranged in the base and is located directly below the first vertical plate. A vertical rod inserted into the cavity is provided on the first vertical plate. A driving mechanism for driving the vertical rod to slide along the axis of the sliding rod is arranged in the cavity. A strip-shaped through hole for avoiding the sliding of the vertical rod is provided at the top of the base.

[0006] Preferably, the driving mechanism includes a lead screw and a motor. The lead screw is rotatably arranged in the cavity. The lead screw is parallel to the sliding rod. The vertical rod is threadedly connected to the lead screw. One end of the lead screw passes through the outer side wall of the base, and the motor is arranged on the base and is drivingly connected to the end of the lead screw passing through the outer side wall.

[0007] Preferably, the vertical rod is arranged at the bottom end of the first vertical plate, and the spring is sleeved on the sliding rod.

[0008] Preferably, on one side of the top of the base away from the first vertical plate, there is an inverted T-shaped chute extending along the sliding direction of the sliding rod. A slider is slidably fitted in the chute. At the top of the slider, there is a threaded through hole of the slider. A limiting screw is arranged in the threaded through hole of the slider. The second vertical plate is arranged on the slider.

[0009] Preferably, the top of the slider is coplanar with the top of the base. The second vertical plate is arranged on one side of the top of the slider close to the center of the base. The threaded through hole of the slider is arranged on one side of the top of the slider away from the center of the base.

[0010] Preferably, elastic pads are arranged on two opposite surfaces of the clamping plate and the second vertical plate.

[0011] Preferably, anti-slip stripes are arranged on both elastic pads.

[0012] Preferably, mounting plates are arranged on both opposite side walls of the base near the bottom end of the base. Mounting through holes are arranged on the mounting plates.

[0013] The beneficial effects of the present utility model are as follows: By means of the driving mechanism, the first vertical plate is moved. When the spring is located between the first vertical plate and the third vertical plate, moving the first vertical plate towards the third vertical plate can reduce the clamping force provided by the spring. When the spring is located between the first vertical plate and the clamping plate, moving the first vertical plate away from the clamping plate can reduce the clamping force provided by the spring. The clamping force provided by the spring is adjusted by moving the first vertical plate, preventing the filter from being damaged by pressing, or preventing the clamping of the filter from becoming loose due to the decrease in the elastic force of the spring after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0015] Figure 2 is an embodiment of the present utility model Figure 1 enlarged schematic diagram of area A;

[0016] Figure 3 is a schematic sectional structure diagram inside the cavity of an embodiment of the present utility model.

[0017] Reference numerals: 1 base, 10 cavity, 11 strip-shaped through hole, 2 first vertical plate, 20 sliding rod, 21 clamping plate, 22 third vertical plate, 23 spring, 24 vertical rod, 3 second vertical plate, 4 lead screw, 5 motor, 6 chute, 60 slider, 61 limiting screw, 7 elastic pad, 8 mounting plate, 80 mounting through hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] In order to make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model. Obviously, the described embodiments are partial embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present utility model. In addition, the directional terms mentioned in the present utility model, such as "up", "down", "front", "rear", "left", "right", "inside", "outside", etc., are only references to the directions in the attached drawings. The directional terms used are for better and clearer explanation and understanding of the present utility model, rather than indicating or implying the orientation that the present utility model must have. Therefore, it should not be construed as a limitation to the present utility model.

[0019] The embodiments of the present utility model are as follows Figures 1 to 3As shown in the figure, a fixture for filter testing includes a base 1 with a cuboid structure. On the left and right sides of the top of the base 1, a first vertical plate 2 and a second vertical plate 3 are correspondingly arranged. The first vertical plate 2 is located at the middle position on the left side of the base, and the second vertical plate 3 is located at the middle position on the right side of the base. Both the first vertical plate 2 and the second vertical plate 3 are of rectangular structures and extend in the front-back direction. A vertical plate through-hole is provided at the center position of the first vertical plate 2. A sliding rod 20 is slidably arranged in the vertical plate through-hole. One end of the sliding rod 20 close to the center of the base 1 is provided with a clamping plate 21. The clamping plate 21 and the second vertical plate 3 are at the same height. The other end of the sliding rod 20 away from the center of the base 1 is provided with a third vertical plate 22, that is, the right end of the sliding rod 20 is provided with the clamping plate 21, and the right end of the sliding rod 20 is connected to the center of the clamping plate 21. The left end of the sliding rod 20 is provided with the third vertical plate 22, and the left end of the sliding rod 20 is connected to the center of the third vertical plate 22. The clamping plate 21 is of rectangular structure, and the third vertical plate 22 is of circular plate structure. The centers of the clamping plate 21, the first vertical plate 2, the second vertical plate 3, and the third vertical plate 22 are located on the same axis. A spring 23 is arranged between the first vertical plate 2 and the third vertical plate 22. The spring 23 can also be arranged between the first vertical plate 2 and the clamping plate 21. The spring 23 is sleeved on the sliding rod 20. A cavity 10 is arranged in the base 1 directly below the first vertical plate 2. A vertical rod 24 inserted into the cavity 10 is provided at the center position of the bottom end of the first vertical plate 2. A driving mechanism for driving the vertical rod 24 to slide along the axis of the sliding rod 20 is arranged in the cavity 10. A strip-shaped through-hole 11 for avoiding the sliding of the vertical rod 24 is arranged at the top of the base 1, that is, the strip-shaped through-hole 11 extends in the left-right direction. The front and rear side walls of the vertical rod 24 are correspondingly abutted against the front and rear inner side walls of the strip-shaped through-hole 11. The filter is clamped by the clamping plate 21 and the second vertical plate 3. The driving mechanism is used to drive the first vertical plate to move by driving the vertical rod 24. When the spring 23 is located between the first vertical plate 2 and the third vertical plate 3, the first vertical plate 2 moves to the left to reduce the clamping force provided by the spring 23. On the contrary, when the first vertical plate 2 moves to the right, the clamping force provided by the spring 23 can be increased. When the spring 23 is located between the first vertical plate 2 and the clamping plate 21, the first vertical plate 2 moves to the left to reduce the clamping force provided by the spring 23. On the contrary, when the first vertical plate 2 moves to the right, the clamping force provided by the spring 23 can be increased. The clamping force provided by the spring 23 is adjusted by moving the first vertical plate 2 to prevent the filter from being damaged, or to prevent the clamping of the filter from becoming loose due to the decrease in the elastic force of the spring after long-term use.

[0020] Further improvement, such as Figure 1 and Figure 3As shown in the figure, the driving mechanism includes a lead screw 4 and a motor 5. The lead screw 4 is rotatably arranged in the cavity 10. The lead screw 4 is parallel to the slide bar 20, that is, the lead screw 4 extends in the left-right direction. Cavity holes are provided on the left and right inner side walls of the cavity 10. The left and right ends of the lead screw 4 are correspondingly arranged in the two cavity holes. Bearings are provided between the two cavity holes and the left and right ends of the lead screw 4. A threaded through hole is provided on the vertical rod 24. The vertical rod 24 is threadedly connected to the lead screw 4 through the threaded through hole. The cavity hole on the left is a through hole, and the cavity hole on the right is a blind hole. The left end of the lead screw 4 passes through the outer side wall of the base 1 through the cavity hole on the left. The motor 5 is arranged on the left side wall of the base. The output end of the motor 5 is fixedly connected to the left end of the lead screw 4.

[0021] For further improvement, as Figure 1 and Figure 2 shown in the figure, a reverse T-shaped chute 6 extending along the sliding direction of the slide bar 20 is provided on one side of the top of the base 1 away from the first vertical plate 2, that is, the chute 6 is provided at the middle position on the right side of the top of the base 1, and the chute 6 extends in the left-right direction. A slider 60 is slidably matched in the chute 6, that is, the cross section of the slider 60 is also of a reverse T-shaped structure. The top end of the slider 60 is coplanar with the top of the base 1. A threaded through hole of the slider is provided at the top end of the slider 60 on the side away from the center of the base 1, that is, the threaded through hole of the slider is located on the right side of the top end of the slider 60. A limit screw 61 is arranged in the threaded through hole of the slider. The second vertical plate 3 is arranged on the slider 60. The second vertical plate 3 is arranged on the side of the top end of the slider 60 close to the center of the base 1, that is, the second vertical plate 3 is located on the left side of the top end of the slider 60. The second vertical plate 3 can slide in the left-right direction through the slider 60, and the slider 60 can be limited through the threaded through hole of the slider and the limit screw 61, that is, the position of the second vertical plate 3 in the left-right direction can be limited and adjusted, so that this fixture can clamp and position filters of different specifications.

[0022] For further improvement, as Figure 1 and Figure 3 shown in the figure, elastic pads 7 are provided on the two opposite surfaces of the clamping plate 21 and the second vertical plate 3, that is, elastic pads 7 are provided on the right side surface of the clamping plate 21 and the left side surface of the second vertical plate 3. The elastic pads 7 can be made of rubber pads. Anti-slip stripes are provided on both elastic pads 7. The elastic pads 7 can prevent the clamped filter from being damaged, and the anti-slip stripes make the fixation of the filter more stable.

[0023] For further improvement, as Figure 1 and Figure 3As shown in the figure, mounting plates 8 adjacent to the bottom end are provided on the left and right side walls of the base 1. Mounting through holes 80 are provided on the mounting plates 8. Two mounting through holes 80 are arranged in the front-rear direction on each mounting plate. The mounting plates 8 and the mounting through holes 80 facilitate the installation of this jig and prevent the overall movement of this jig from affecting the test of the filter.

[0024] It should be understood that those of ordinary skill in the art can make improvements or transformations according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of this utility model.

Claims

1. A fixture for filter testing, comprising a base; characterized in that: The first vertical plate and the second vertical plate are correspondingly arranged on two opposite sides of the top of the base; a vertical plate through hole is arranged on the first vertical plate; a sliding rod is slidably arranged in the vertical plate through hole; a clamping plate is arranged at the end of the sliding rod close to the center of the base; a third vertical plate is arranged at the end of the sliding rod away from the center of the base; a spring is arranged between the first vertical plate and the third vertical plate or between the first vertical plate and the clamping plate; a cavity is arranged in the base directly below the first vertical plate; a vertical rod inserted into the cavity is arranged on the first vertical plate; a driving mechanism for driving the vertical rod to slide along the axial direction of the sliding rod is arranged in the cavity; a strip through hole is arranged at the top of the base to avoid the vertical rod from sliding.

2. A filter test fixture according to claim 1, characterized in that: The driving mechanism includes a screw rod and a motor; the screw rod is rotatably arranged in the cavity; the screw rod is parallel to the sliding rod; the vertical rod is threadedly connected to the screw rod; one end of the screw rod passes through the outer wall of the base; the motor is arranged on the base and is drivingly connected to the end of the screw rod passing through the outer wall.

3. The filter test fixture according to claim 1, characterized in that: The vertical rod is arranged at the bottom end of the first vertical plate; and the spring is sleeved on the sliding rod.

4. The filter test fixture according to claim 1, characterized in that: An inverted T-shaped sliding groove extending along the sliding direction of the sliding rod is arranged on the side of the top of the base away from the first vertical plate; a sliding block is matched and slidably arranged in the sliding groove; a sliding block threaded through hole is arranged at the top of the sliding block; a limiting screw is arranged in the sliding block threaded through hole; and the second vertical plate is arranged on the sliding block.

5. The filter test fixture according to claim 4, characterized in that: The top of the slider is coplanar with the top of the base; the second vertical plate is arranged on the side of the top of the slider close to the center of the base; the threaded through hole of the slider is arranged on the side of the top of the slider away from the center of the base.

6. The filter test fixture according to claim 1, characterized in that: Elastic pads are arranged on two opposite surfaces of the clamping plate and the second vertical plate.

7. The filter test fixture according to claim 6, characterized in that: Anti-slip stripes are arranged on the two elastic pads.

8. The filter test fixture according to claim 1, characterized in that: The two opposite side walls of the base are both provided with mounting plates adjacent to the bottom end of the base; the mounting plates are provided with mounting through holes.

Images