Detection device for allowable displacement of chip

Abstract

The utility model discloses a detection device for allowable displacement of a chip. The detection device comprises a test module, a transmission module and an operation table. The test module is fixedly installed on the operation table, the transmission module is installed on the test module, and the sample chip side of the test module is installed on an upper installation plate of the transmission module. According to the detection device for the allowable displacement of the chip, after a sample chip is welded on a PCB, the PCB is in threaded connection with a mounting seat of a test module, and meanwhile, the circuit board is connected with a PC (Personal Computer) end; the transmission module converts rotary motion into linear reciprocating motion of an upper mounting plate through worm and gear transmission and thread transmission, due to worm and gear transmission and thread transmission, the machining cost and the machining difficulty can be reduced under the same precision, and for example, the defects that the thread pitch is very small, the cost is high, the machining difficulty is large, and the size of a worm gear is large are overcome; through a displacement sensor and a push-pull force sensor, the allowable push-pull displacement after chip welding can be effectively detected.

Description

Technical Field

[0001] The utility model relates to the technical field of automotive electronic auxiliary detection equipment, and particularly relates to a detection device for the allowable displacement of a chip. Background Technique

[0002] With the continuous development of science and technology, the interaction form of automotive in-vehicle systems has gradually shifted from physical buttons to full touch and voice interaction; components such as central control large screens, liquid crystal instrument panels, and streaming media rearview mirrors have enriched the functionality and entertainment of automotive in-vehicles. With the diversified development of the functions of automotive in-vehicle systems, the installation and heat dissipation methods of corresponding chips have also been continuously optimized. However, in actual applications, after the chip pins are welded and fixed, the pushing and pulling of the pins during the installation and fitting process of the chip and the radiator will cause different degrees of damage to the wafers inside the chip. When the pushing and pulling displacement is too large, it will cause the chip function to fail, resulting in the loss of the functionality of the in-vehicle system and affecting the use of users. Content of the Utility Model

[0003] Aiming at the problems existing in the above-mentioned prior art, the utility model provides a detection device for the allowable displacement of a chip, aiming to solve the above-mentioned technical problems.

[0004] To achieve the above purpose, the utility model is realized through the following technical solutions: A detection device for the allowable displacement of a chip, characterized in that it includes an operation table module, a transmission module, and a test module. The operation table module includes an operation table;

[0005] The test module includes a test module base, the test module base is fixed on the operation table by screws, a pressure sensor mounting seat is fixed on one side of the test module base by screws, a pressure sensor is mounted and fixed on the pressure sensor mounting seat, and on the other side of the test module base, a circuit board mounting base and a signal receiving board are sequentially fixed by screws from near to far. A PCB board is mounted and fixed on the circuit board mounting base by screws, and the pins of the chip sample are welded to the PCB board;

[0006] The transmission module includes a chip sample mounting plate and a transmission component cavity. The transmission component cavity is fixedly mounted on the test module base by screws, and is arranged between the pressure sensor mounting seat and the circuit board mounting base. The same-side surface of the transmission component cavity is fixedly mounted with a driving motor by screws, and a worm is mounted through bearing three. On one side of the worm facing the inside of the transmission component cavity, a second gear is fixedly mounted, and on the other side extending out of the transmission component cavity, a screw dial is provided. A first gear is fixedly mounted on the shaft of the driving motor. Inside the transmission component cavity, a worm and worm gear are arranged along its axis direction. One end of the worm and worm gear is rotatably mounted inside the transmission component cavity through bearing one, and the other end is rotatably mounted inside the transmission component cavity through a plain bearing and a second plain bearing. The end face of the worm and worm gear near the second plain bearing is pressed tightly with a plug. The first gear meshes and drives the second gear and the worm and worm gear in sequence, causing the internal threaded transmission rod sleeved on the worm and worm gear to perform a reciprocating linear motion. A tapered groove is opened at the upper part of the internal threaded transmission rod, and the tapered groove fixes a sliding block through two tapered head screws. The sliding block is arranged at the top of the transmission component cavity. The chip sample mounting plate is mounted on the sliding block by screws and is arranged near one side of the PCB board. A displacement sensor is mounted on the side of the sliding block by screws.

[0007] Preferably, the pressure sensor mounting seat is adjustably mounted on the test module base.

[0008] Preferably, the pressure sensor is in contact with the sliding block, used to detect the force condition of the chip sample, and feedback the detection result to the PC end in real time.

[0009] Preferably, the operating table is mounted with test module bases and circuit board mounting bases of different models by screws to be used for adapting chips of various sizes and mounting methods.

[0010] Preferably, a locking screw is arranged at the connection between the internal threaded transmission rod and the worm and worm gear to eliminate the thread clearance between the internal threaded transmission rod and the worm and worm gear.

[0011] In summary, the present utility model provides a detection device for the allowable displacement of a chip. After the chip pins are welded to the PCB board, it can perform a linear reciprocating motion under the push of the transmission module. The chip is connected to the PC end. Through the displacement sensor and the push-pull force sensor, the working condition of the chip under different displacements can be detected in real time. As the displacement continuously increases, whether the chip loses its function can be determined, and then the allowable displacement after the chip is welded can be obtained.

[0012] The remarkable advantages of the present utility model are:

[0013] The present utility model combines the worm and worm gear transmission with the screw transmission to convert the rotational motion into a linear reciprocating motion and applies it to the field of chip detection devices. The controllable accuracy of the chip displacement is high.

[0014] (2) When the adjustment precision is high, only when the lead of the internal and external threads in the screw drive needs to be processed very small, the cost is high and the processing difficulty is large, and even it cannot be processed; in the present utility model, the worm wheel and the external threaded rod are made on the same part. By the characteristic of the large transmission ratio of the worm and worm wheel, when the adjustment precision is high, the lead of the screw drive can be made relatively large, thus solving the problems of high cost, large processing difficulty and even inability to process.

[0015] (3) The allowable displacement of the monitoring chip can be carried out through the manual mode and the automatic mode; and by real-time monitoring the allowable displacement of the chip, the actual assembly of the product can be effectively guided; and by replacing different mounting plates and mounting bases, it can be applicable to the detection of the allowable displacement after welding chips of different sizes. Brief Description of the Drawings

[0016] Figure 1 It is the assembly drawing of the detection device for the allowable displacement of a chip of the present utility model;

[0017] Figure 2 It is the schematic diagram of the operating platform of the present utility model;

[0018] Figure 3 It is the schematic diagram of the structure of the test module of the present utility model;

[0019] Figure 4 It is the schematic diagram of the structure of the drive module of the present utility model;

[0020] Figure 5 It is the schematic diagram of the internal drive structure in the drive module of the present utility model;

[0021] Figure 6 It is the sectional view of the structure of the drive module of the present utility model;

[0022] In the figure: 1. Operating platform module, 2. Test module, 3. Drive module, 4. PC terminal, 5. Operating platform, 6. Pressure sensor mounting seat, 7. Pressure sensor, 8. Test module base, 9. Sample chip, 10. PCB board, 11. Signal receiving board, 12. Circuit board mounting base, 13. Chip sample mounting plate, 14. Displacement sensor, 15. Dial, 16. Driving motor, 17. Sliding block, 18. Gear 1, 19. Bearing 1, 20. Worm and worm wheel, 21. Internal threaded drive rod, 22. Locking screw, 23. Plain bearing 1, 24. Plain bearing 2, 25. Plug, 26. Gear 2, 27. Bearing 2, 28. Bearing 3, 29. Drive component cavity, 30. Locking screw, 31. Worm. Detailed Embodiment

[0023] The present utility model will be further described below with reference to the drawings.

[0024] As Figures 1 to 6 shown:

[0025] The utility model is a detection device for the allowable displacement of a chip in the utility model. As Figure 1 shown, it includes three major parts: an operating table module 1, a transmission module 2, and a test module 3. The transmission module 2 is fixed to the test module 3 by screws, and the test module 3 is fixed to the operating table module 1 by screws. Among them, in the transmission module 2, a chip sample mounting plate 13 is mounted on a sliding block 17 by screws, a displacement sensor 14 is mounted on the side of the sliding block 17 by screws, and a driving motor 16 is mounted and fixed on the side of a transmission component cavity 29 by screws; the internal structure is as Figure 4 、 5 shown. One end of a worm and worm gear 20 is mounted with a bearing one 19, and the other end has a plain bearing 23 and a plain bearing two 24, both of which are mounted inside the transmission component cavity 29 and are pressed by a plug 25 on one side; the bottom of an internally threaded transmission rod 21 forms a threaded transmission with the external thread of the worm and worm gear 20, and a locking screw 30 is used to eliminate the thread clearance. The upper conical groove of the internally threaded transmission rod 21 is fixed to the sliding block 17 by two taper head screws 22; a gear one 18 is mounted and fixed on the shaft of the driving motor 16, a gear two 26 and a bearing three 28 are respectively located at both ends of a worm 31, and a dial 15 is mounted and fixed to one end of the worm 31 by screws. The test module 3 includes a test module base 8 fixed to an operating table 5 by screws, a pressure sensor mounting seat 6 fixed to the test module base 8 by screws and with an adjustable distance, a pressure sensor 7 mounted and fixed on the test module base 8, a signal receiving board 11 and a circuit board mounting base 12 both fixed to the test module base 8 by screws. The pins of a chip sample 9 are soldered to a PCB board 10, and the PCB board 10 is mounted and fixed to the circuit board mounting base 12 by screws, and the PCB board is connected to a PC terminal. The test module base 8 and the circuit board mounting base 12 with different shapes and hole positions can be adapted to various chips with different sizes and different mounting methods.

[0026] The working principle of the utility model is as follows:

[0027] 1. Automatic mode: The drive motor 16 drives through the gear transmission between gear one 18 and gear two 26. At the same time, gear two 26 is fixedly connected to worm 31, and a worm and worm gear transmission is formed between worm 31 and the worm gear end of worm and worm gear 20. At the same time, a screw thread transmission is formed between the external thread at one end of worm and worm gear 20 and the internal thread transmission rod 21. And worm and worm gear 20 has only 1 degree of freedom of rotation around the axis. Thus, the internal thread transmission rod 21 will perform a linear motion. By the forward and reverse rotation of drive motor 16, the reciprocating linear motion of the internal thread transmission rod 21 will be controlled, thereby driving the reciprocating linear motion of slider 17, and then pushing and pulling the sample chip (with chip pins fixed) to generate displacement. The displacement sensor 14 can detect the distance change between it and the sensor receiving board 11. At the same time, the push-pull force sensor 7 can detect the force condition of the sample chip 9, and feedback the detection result to the PC side 4 in real time, obtaining the displacement change curve and the push-pull force curve of the sample chip;

[0028] 2. Manual mode: Rotate the dial 15 through a wrench, thereby driving the rotation of worm 31. A worm and worm gear transmission is formed between worm 31 and the worm gear end of worm and worm gear 20. At the same time, a screw thread transmission is formed between the external thread at one end of worm and worm gear 20 and the internal thread transmission rod 21. And worm and worm gear 20 has only 1 degree of freedom of rotation around the axis. Thus, the internal thread transmission rod 21 will perform a linear motion, completing the conversion of the rotational motion in the manual mode into the reciprocating linear motion of slider 17. Other detections are the same as in the automatic mode.

[0029] 3. With the reciprocating motion (positive and negative displacements) of the sample chip 9, when the displacement is large, the PC side 4 can detect the loss of functionality of the sample chip 9, and obtain the allowable displacement after the pins of the sample chip 9 are welded.

[0030] 4. When the adjustment precision is high, only when the lead of the internal and external threads in the screw thread transmission needs to be processed very small, the cost is high, the processing difficulty is large, and even it cannot be processed; in this utility model, the worm gear and the external threaded rod are made on the same part. Through the characteristics of the large transmission ratio of the worm and worm gear, when the same high adjustment precision is achieved, the lead of the screw thread transmission can be made relatively large, thus solving the problems of high cost, large processing difficulty, and even inability to process.

[0031] 5. According to the actual assembly of the product, replacing different mounting plates and mounting bases can be applicable to the detection of the allowable displacement after different chips are welded.

[0032] The embodiments in this utility model are only used to illustrate this utility model, and do not constitute a limitation to the scope of the claims. Other substantially equivalent substitutions that can be thought of by those skilled in the art are all within the protection scope of this utility model.

Claims

1. A device for detecting allowable displacement of a chip, characterized in that: It comprises an operating table module (1), a transmission module (2), and a test module (3), wherein the operating table module (1) comprises an operating table (5); The test module (3) comprises a test module base (8), the test module base (8) being fixed to the operating table (5) by screws, a pressure sensor mounting seat (6) being fixed to one side of the test module base (8) by screws, a pressure sensor (7) being mounted and fixed to the pressure sensor mounting seat (6), a circuit board mounting seat (12) and a signal receiving board (11) being fixed to the other side of the test module base (8) by screws in sequence from near to far, a PCB (10) being fixed to the circuit board mounting seat (12) by screws, and pins on the PCB (10) being welded to the pins of the chip sample (9); The transmission module (2) comprises a chip sample mounting plate (13) and a transmission component cavity (29). The transmission component cavity (29) is fixed to the test module base (8) by screws, and the transmission component cavity (29) is arranged between the pressure sensor mounting seat (6) and the circuit board mounting base (12). The same-direction side surface of the transmission component cavity (29) is fixed with a drive motor (16) by screws, and a worm (31) is installed through a bearing three (28). The worm (31) is fixed with a gear two (26) on one side facing the inside of the transmission component cavity (29), and extends out of the transmission component cavity (29) through a screw dial (15) on the other side. A fixed gear one (18) is installed on the shaft of the drive motor (16). A worm gear (20) is arranged inside the transmission component cavity (29) along its axial direction. One end of the worm gear (20) is connected to the transmission component through a bearing one (19). The worm gear (20) is rotatably mounted inside the cavity (29); the other end of the worm gear (20) is rotatably mounted inside the cavity (29) of the transmission component through a plane bearing (23) and a second plane bearing (24); the end face of the worm gear (20) close to the second plane bearing (24) is pressed by a plug (25); the first gear (18) is meshed with the second gear (26) and the worm gear (20) in sequence, so that the internal thread transmission rod (21) sleeved on the worm gear (20) performs reciprocating linear motion; a conical groove is formed on the upper part of the internal thread transmission rod (21); the conical groove fixes the sliding block (17) through two cone head screws 22; the sliding block (17) is arranged on the top of the cavity (29) of the transmission component; the chip sample mounting plate (13) is mounted on the sliding block (17) through screws and is arranged on a side close to the PCB board (10); and the displacement sensor (14) is mounted on the side of the sliding block (17) through screws.

2. A chip allowable displacement detection device according to claim 1, characterized in that: The pressure sensor mounting base (6) is mounted on the test module base (8) in an adjustable distance.

3. The device for detecting allowable chip displacement according to claim 1, characterized in that: The pressure sensor (7) is arranged in contact with the sliding block (17) and is used to detect the force applied to the chip sample (9) and to feed back the detection result to the PC end (4) in real time.

4. The device for detecting allowable chip displacement according to claim 1, characterized in that: The operating table (5) is mounted with different types of test module bases (8) and circuit board mounting bases (12) by means of screws, so as to be adapted to chips of various sizes and mounting methods.

5. The device for detecting allowable chip displacement according to claim 1, characterized in that: A locking screw (30) is provided at the connection between the internal thread transmission rod (21) and the worm gear (20) to eliminate the thread gap between the internal thread transmission rod (21) and the worm gear (20).

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