SMT coupling test fixture

Abstract

The utility model relates to the technical field of test fixtures, in particular to an SMT coupling test fixture which comprises a clamping table, a first motor is fixedly connected to the surface of the clamping table, a square nut is fixedly connected to an output shaft of the first motor, a fixing block is fixedly connected to the surface of the square nut, a rotating rod is arranged on the surface of the fixing block, and a clamping groove is formed in the surface of the rotating rod. And the surface of the rotating rod is fixedly connected with an adjusting rod. The angle of the clamping rod is adjusted through the fixing block, the rotating rod, the adjusting rod, the supporting frame, the second motor, the ball screw and the moving block, the clamping angle of the clamping rod is adjusted, so that the clamping rod and the circuit board are better attached when the bent circuit board is clamped by the clamping rod, the clamping stability of the circuit board is guaranteed, and the clamping efficiency of the circuit board is improved. Shaking is avoided, and the use effect of the test fixture is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of test fixture technology, specifically to an SMT coupling test fixture. Background Technology

[0002] SMT coupling test fixtures are specialized tools used for coupling tests on circuit boards manufactured using surface mount technology. Their main function is to ensure an accurate and stable connection between the circuit board and the test equipment during testing, guaranteeing effective transmission of test signals and thus accurately detecting various performance indicators of the circuit board, such as signal transmission quality and electromagnetic compatibility.

[0003] The test fixture clamps the circuit board directly through the clamping rods. Due to the material and manufacturing process of the circuit board, some circuit boards may be bent. In this case, the clamping rods on the conventional test fixture cannot fit well with the two sides of the circuit board, which can easily cause the circuit board to wobble, thus affecting the use of the test fixture. Utility Model Content

[0004] The purpose of this invention is to provide an SMT coupling test fixture to solve the problem mentioned in the background art that the clamping rods on conventional test fixtures cannot fit well with the two sides of the circuit board, which easily causes the circuit board to wobble and thus affects the performance of the test fixture.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an SMT coupling test fixture, comprising a clamping platform, a first motor fixedly connected to the surface of the clamping platform, a square nut fixedly connected to the output shaft of the first motor, a fixing block fixedly connected to the surface of the square nut, a rotating rod on the surface of the fixing block, an adjusting rod fixedly connected to the surface of the rotating rod, a support frame fixedly connected to the surface of the fixing block, a second motor fixedly connected to the surface of the support frame, a ball screw fixedly connected to the surface of the second motor, a moving block threadedly connected to the surface of the ball screw, a support block fixedly connected to the surface of the rotating rod, a rotating shaft rotatably connected to the surface of the support block, an adjusting plate fixedly connected to the surface of the rotating shaft, a clamping rod fixedly connected to the surface of the adjusting plate, a worm gear fixedly connected to the surface of the rotating shaft, a third motor fixedly connected to the surface of the rotating rod, and a worm gear fixedly connected to the output shaft of the third motor.

[0006] Preferably, the first motor drives the bidirectional lead screw to rotate through the output shaft. The bidirectional lead screw drives the square nut to slide on the surface of the clamping table through rotation. There are two sets of square nuts, and the sliding directions of the two sets of square nuts are opposite.

[0007] Preferably, a rectangular hole is formed on the surface of the support frame, the second motor drives the third motor to rotate on the rectangular hole of the support frame, a threaded hole is formed on the surface of the moving block, and the ball screw is threadedly connected to the threaded hole of the moving block.

[0008] Preferably, the ball screw drives the moving block to slide on the top of the rectangular hole of the support frame by rotation. The bottom of the moving block has a rectangular groove, and the adjusting rod is inserted into the rectangular groove of the moving block. The moving block limits the angle of the rotating rod on the fixed block by the adjusting rod.

[0009] Preferably, a rectangular through hole is formed on the surface of the rotating rod, and the adjusting plate rotates on the rectangular through hole of the rotating rod through a rotating shaft. The adjusting plate drives the clamping rod to rotate synchronously on one side of the rotating rod.

[0010] Preferably, the third motor drives the worm to rotate on one side of the rotating rod via its output shaft, the worm wheel and the worm mesh with each other, and the worm wheel rotates on one side of the support block via a rotating shaft.

[0011] Preferably, the worm drives the worm wheel to rotate by rotation, and the worm automatically locks the position of the worm wheel on the support block after rotation. The rotating shaft restricts the position of the adjusting plate and the clamping rod on one side of the rotating rod through the support block.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This test fixture uses the output shaft of a second motor to drive a ball screw to rotate on a support frame. The ball screw, through rotation, drives a moving block to slide on a rectangular groove in the support frame. During the sliding process, the moving block drives an adjusting rod and a rotating rod to rotate at one end of a fixed block through its rectangular groove, thereby changing the angle of the rotating rod on the fixed block. The rotating rod then drives the angle of the clamping rod to change synchronously. By adjusting the clamping angle of the clamping rod, the clamping rod and the circuit board can fit better when clamping a bent circuit board, thus ensuring the clamping stability of the circuit board, preventing shaking, and ensuring the effectiveness of the test fixture.

[0014] 2. This test fixture uses the output shaft of a third motor to drive a worm gear to rotate. The worm gear, through its rotation, drives a worm wheel to rotate on a support block. The worm wheel, through the support block, drives an adjusting plate and a clamping rod to rotate synchronously, thereby changing the height of both sides of the clamping rod. After prolonged use, the height of both ends of the clamping rod will change. Adjusting the height of both sides of the clamping rod to a balanced state can ensure that the circuit board is subjected to a uniform clamping force, reducing errors caused by uneven force. Attached Figure Description

[0015] Figure 1 This is a three-dimensional front view of the structure of this utility model;

[0016] Figure 2 This is a frontal perspective three-dimensional schematic diagram of the rotating rod structure of this utility model;

[0017] Figure 3 This is a frontal sectional perspective view of one end of the rotating rod structure of this utility model;

[0018] Figure 4 This is a three-dimensional schematic diagram of the rotating rod structure of this utility model, viewed from the front and from below.

[0019] Figure 5 This utility model Figure 4 A magnified structural diagram of point A in the middle.

[0020] In the diagram: 1. Clamping platform; 11. First motor; 12. Double-acting lead screw; 13. Square nut; 2. Fixed block; 21. Rotating rod; 22. Adjusting rod; 23. Support frame; 24. Second motor; 25. Ball screw; 26. Moving block; 3. Support block; 31. Rotating shaft; 32. Adjusting plate; 33. Clamping rod; 34. Worm gear; 35. Third motor; 36. Worm. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not 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 effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-5 One embodiment provided by this utility model:

[0023] An SMT coupling test fixture includes a clamping platform 1, a first motor 11 fixedly connected to the surface of the clamping platform 1, a square nut 13 fixedly connected to the output shaft of the first motor 11, a fixing block 2 fixedly connected to the surface of the square nut 13, a rotating rod 21 on the surface of the fixing block 2, an adjusting rod 22 fixedly connected to the surface of the rotating rod 21, a support frame 23 fixedly connected to the surface of the fixing block 2, a second motor 24 fixedly connected to the surface of the support frame 23, a ball screw 25 fixedly connected to the surface of the second motor 24, a moving block 26 threadedly connected to the surface of the ball screw 25, a support block 3 fixedly connected to the surface of the rotating rod 21, a rotating shaft 31 rotatably connected to the surface of the support block 3, an adjusting plate 32 fixedly connected to the surface of the rotating shaft 31, and a clamping rod 33 fixedly connected to the surface of the adjusting plate 32. A worm gear 34 is fixedly connected to the surface of the rotating rod 21, and a third motor 35 is fixedly connected to the surface of the rotating rod 21. A worm gear 36 is fixedly connected to the output shaft of the third motor 35. The test fixture clamps the circuit board through the clamping rod 33. The clamping rod 33 can adjust the clamping tilt angle, so that when clamping a bent circuit board, the angle of the clamping rod 33 can be adjusted to make the clamping rod 33 and the circuit board fit better, thereby ensuring the clamping stability of the circuit board, avoiding shaking, and ensuring the use effect of the test fixture. In addition, the test fixture can finely adjust the clamping height of the two ends of the clamping rod 33. After long-term use, the height of the two ends of the clamping rod 33 will change. Adjusting the height of the two sides of the clamping rod 33 to a balanced state can make the circuit board receive a uniform clamping force and reduce the error caused by uneven force.

[0024] Furthermore, the first motor 11 drives the bidirectional lead screw 12 to rotate via the output shaft. The bidirectional lead screw 12 drives the square nut 13 to slide on the surface of the clamping table 1 by rotation. There are two sets of square nuts 13, and the sliding directions of the two sets of square nuts 13 are opposite. The square nuts 13 drive the fixed block 2 and the rotating rod 21 to move synchronously. The rotating rod 21 drives the clamping rod 33 to test the circuit board, thereby facilitating the coupling test of the circuit board on the clamping table 1.

[0025] Furthermore, a rectangular hole is provided on the surface of the support frame 23. The second motor 24 drives the third motor 35 to rotate on the rectangular hole of the support frame 23. A threaded hole is provided on the surface of the moving block 26. The ball screw 25 is threadedly connected to the threaded hole of the moving block 26. The ball screw 25 restricts the position of the moving block 26 on the support frame 23. The moving block 26 restricts the clamping angle of the rotating rod 21 and the support frame 23 at one end of the fixed block 2 through the adjusting rod 22.

[0026] Furthermore, the ball screw 25 drives the movable block 26 to slide on the top of the rectangular hole in the support frame 23 by rotation. The bottom of the movable block 26 has a rectangular groove, and the adjusting rod 22 is inserted into the rectangular groove of the movable block 26. The movable block 26 restricts the angle of the rotating rod 21 on the fixed block 2 by adjusting the rod 22. When the angle of the movable block 26 changes, the movable block 26 pushes the adjusting rod 22 and the rotating rod 21 to rotate at one end of the fixed block 2 through the rectangular groove, thereby changing the angle of the rotating rod 21, and thus changing the angle of the clamping rod 33. The adjusting rod 22 will move and rotate on the rectangular groove of the movable block 26, thereby ensuring that the movable block 26 is always on the rectangular groove of the adjusting rod 22.

[0027] Furthermore, a rectangular through hole is provided on the surface of the rotating rod 21. The adjusting plate 32 rotates on the rectangular through hole of the rotating rod 21 through the rotating shaft 31. The adjusting plate 32 drives the clamping rod 33 to rotate synchronously on one side of the rotating rod 21. The adjusting plate 32 changes the height of both sides of the clamping rod 33 by rotating, so as to facilitate the adjustment of the clamping rod 33 to a balanced state.

[0028] Furthermore, the third motor 35 drives the worm 36 to rotate on one side of the rotating rod 21 via the output shaft. The worm wheel 34 and the worm 36 mesh with each other. The worm wheel 34 rotates on one side of the support block 3 via the rotating shaft 31. The worm wheel 34, the adjusting plate 32 and the clamping rod 33 rotate synchronously on the rotating rod 21, while the worm 36 limits the angle of the rotating shaft 31 on the support block 3 via the worm wheel 34.

[0029] Furthermore, the worm gear 36 drives the worm wheel 34 to rotate by rotation. After rotation, the worm gear 36 automatically locks the position of the worm wheel 34 on the support block 3. The rotating shaft 31 restricts the position of the adjusting plate 32 and the clamping rod 33 on one side of the rotating rod 21 through the support block 3, thereby restricting the clamping position of the clamping rod 33 on the rotating rod 21. The clamping angle of the clamping rod 33 on the rotating rod 21 can be adjusted by the worm gear 36, changing the height of both sides of the clamping rod 33, and ensuring the clamping effect of the clamping rod 33 on the circuit board.

[0030] Working principle: The clamping rod 33 rotates at one end of the fixed block 2 via the rotating shaft 31. The output shaft of the second motor 24 drives the ball screw 25 to rotate on the support frame 23. The ball screw 25 drives the moving block 26 to slide on the rectangular groove of the support frame 23. During the sliding process, the moving block 26 drives the adjusting rod 22 and the rotating rod 21 to rotate at one end of the fixed block 2 through its rectangular groove, thereby changing the angle of the rotating rod 21 on the fixed block 2. The rotating rod 21 drives the angle of the clamping rod 33 to change synchronously. By adjusting the clamping angle of the clamping rod 33, the clamping rod 33 and the circuit board can fit better when clamping the bent circuit board, thus ensuring the clamping stability of the circuit board, avoiding shaking, and ensuring the use effect of the test fixture.

[0031] The output shaft of the third motor 35 drives the worm gear 36 to rotate. The worm gear 36 rotates and drives the worm wheel 34 to rotate on the support block 3. The worm wheel 34 drives the adjusting plate 32 and the clamping rod 33 to rotate synchronously through the support block 3, thereby changing the height of both sides of the clamping rod 33. After long-term use, the height of both ends of the clamping rod 33 will change. Adjusting the height of both sides of the clamping rod 33 to a balanced state can make the circuit board receive a uniform clamping force and reduce the error caused by uneven force.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An SMT coupling test fixture, characterized by: The utility model provides a clamp table, the surface of clamp table (1) is fixedly connected with first motor (11), the output shaft of first motor (11) is fixedly connected with square nut (13), the surface of square nut (13) is fixedly connected with fixed block (2), the surface of fixed block (2) is rotatory pole (21), the surface of rotatory pole (21) is fixedly connected with adjusting lever (22), the surface of fixed block (2) is fixedly connected with support frame (23), the surface of support frame (23) is fixedly connected with second motor (24), the surface of second motor (24) is fixedly connected with ball screw (25), the surface of ball screw (25) is threadedly connected with moving block (26), the surface of rotatory pole (21) is fixedly connected with support block (3), the surface of support block (3) is rotatably connected with pivot (31), the surface of pivot (31) is fixedly connected with adjusting plate (32), the surface of adjusting plate (32) is fixedly connected with clamping rod (33), the surface of pivot (31) is fixedly connected with worm wheel (34), the surface of rotatory pole (21) is fixedly connected with third motor (35), the output shaft of third motor (35) is fixedly connected with worm (36).

2. The SMT coupling test fixture of claim 1, wherein: First motor (11) is driven by output shaft and makes two -way screw rod (12) rotate, two -way screw rod (12) is driven by rotation and makes square nut (13) slide on the surface of clamp table (1), square nut (13) is provided with two groups, and the sliding direction of two groups square nut (13) is opposite.

3. The SMT coupling test fixture of claim 1, wherein: The surface of support frame (23) is provided with a rectangular hole, the second motor (24) drives the third motor (35) to rotate on the rectangular hole of the support frame (23), the surface of the moving block (26) is provided with a threaded hole, the ball screw (25) is threadedly connected on the threaded hole of the moving block (26).

4. The SMT coupling test fixture of claim 3, wherein: The ball screw (25) is driven by rotation and makes the moving block (26) slide on the top of the rectangular hole of the support frame (23), the bottom of the moving block (26) is provided with a rectangular slot, the adjusting lever (22) is inserted into the rectangular slot of the moving block (26), the moving block (26) is limited by the adjusting lever (22) the angle of the rotatory pole (21) on the fixed block (2).

5. The SMT coupling test fixture of claim 1, wherein: The surface of the rotatory pole (21) is provided with a rectangular through hole, the adjusting plate (32) is rotated on the rectangular through hole of the rotatory pole (21) by the pivot (31), the adjusting plate (32) drives the clamping rod (33) to rotate synchronously on one side of the rotatory pole (21).

6. The SMT coupling test fixture of claim 1, wherein: The third motor (35) is driven by the output shaft and makes the worm (36) rotate on one side of the rotatory pole (21), the worm wheel (34) and the worm (36) are engaged with each other, the worm wheel (34) is rotated on one side of the support block (3) by the pivot (31).

7. The SMT coupling test fixture of claim 6, wherein: The worm (36) rotates by rotating the worm wheel (34), the worm (36) above automatically locks the position of the worm wheel (34) on the support block (3) after rotation, and the rotating shaft (31) limits the position of the adjusting plate (32) and the clamping rod (33) on one side of the rotating rod (21) through the support block (3).

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