A PCB board vibration test device

Abstract

The present invention relates to the technical field of PCB board vibration detection, and specifically to a PCB board vibration testing device, comprising a vibration machine, the vibration machine comprising a storage table that vibrates reciprocatingly up and down, the storage table being provided with a reversing mechanism for continuously adjusting the arrangement direction of the PCB board during vibration, and a clamping mechanism for quickly changing and clamping the PCB board. The present invention utilizes a universal joint structure composed of an outer ring plate and an inner rotating frame in the reversing mechanism, in coordination with an energy storage component and a slow-release component, so that the PCB board can dynamically adjust its direction during vibration, simulating multi-directional composite vibration in actual working conditions. Compared with traditional single-direction vibration testing, the vibration coverage dimension is significantly expanded, actual use scenarios can be simulated more realistically, and quality risks of the PCB board can be avoided. The present invention utilizes a linkage component of the clamping mechanism to control the alternating clamping of a first clamping plate and a second clamping plate, thereby quickly changing and clamping the PCB board, thereby improving detection efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of PCB vibration detection, in particular to a PCB vibration testing device. Background Art

[0002] PCBs, as the core carriers of electronic devices, are widely used in consumer electronics, automotive electronics, aerospace and other fields. Their reliability directly determines the performance and lifespan of end products. Since PCBs may be subjected to complex mechanical vibrations during transportation, installation or use, their solder joint connections, laminated structures and component fixation are prone to defects such as cracks and falling off due to vibration stress. Therefore, vibration testing of PCBs before leaving the factory to simulate the mechanical loads under actual working conditions is a key step in evaluating their structural stability and reliability.

[0003] At present, the industry generally uses vibration machines to conduct batch testing of PCB boards. Specifically, multiple PCB boards are fixed on the testing table of the vibration machine and their vibration resistance is tested by reciprocating vibration.

[0004] However, traditional vibration machines can only achieve linear vibration in a single direction. In actual applications, PCBs may be subjected to multi-directional complex vibrations, such as tilt, rotation, or random vibration. This limitation means that test results cannot fully reflect the failure risk of PCBs under complex working conditions. Especially for PCBs in high-precision or high-reliability applications, test blind spots may hide major quality risks.

[0005] In addition, existing equipment mostly uses fixed fixtures with a single clamping direction. The clamping position is pre-set and can only clamp the PCB board in a fixed position. Therefore, it is necessary to re-clamp the PCB board to simulate the vibration resistance of the PCB board in different locking positions. However, the re-clamping method has cumbersome steps and a complicated process, which reduces the efficiency of detection. Summary of the Invention

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a PCB board vibration testing device, including a vibration machine, the vibration machine includes a storage table that vibrates up and down, and the storage table is provided with a reversing mechanism for continuously adjusting the layout direction of the PCB board during vibration, and a clamping mechanism for quickly changing the position of the PCB board.

[0007] The reversing mechanism includes two ear plates fixedly mounted on the upper side of the storage platform and arranged symmetrically in front and back. An outer ring plate is rotatably arranged between the two ear plates. An inner rotating frame is rotatably arranged inside the outer ring plate and combined with the inner rotating frame to form a universal joint structure. It also includes an energy storage component for storing energy for the rotation of the outer ring plate and the inner rotating frame, and a slow-release component for slowly rotating the outer ring plate and the inner rotating frame.

[0008] The clamping mechanism includes two No. 1 clamping plates and two No. 2 clamping plates arranged inside the inner rotating frame through a linkage component. The No. 1 clamping plates and the No. 2 clamping plates can be controlled by the linkage component to alternately clamp and fix the PCB board.

[0009] During testing, the energy storage component and the slow-release component cooperate to slowly rotate the outer ring plate and the inner rotating frame, so that the inner rotating frame can flexibly adjust the vibration direction of the PCB board in real time through the No. 1 clamping plate or the No. 2 clamping plate.

[0010] Preferably, the energy storage assembly includes a transmission gear rotatably arranged on the rotating shaft of the inner rotating frame, a locking unit is provided on the rotating shaft of the inner rotating frame to lock the transmission gear and the inner rotating frame together, and an end face gear is rotatably arranged inside the outer ring plate to engage with the transmission gear.

[0011] Preferably, the locking unit includes locking grooves on the side of the transmission gear at equal intervals along its circumference, and a number of locking square rods sliding radially are arranged on the rotating shaft of the inner rotating frame at equal intervals along its circumference. After the locking square rods are inserted into the corresponding locking grooves, the transmission gear and the inner rotating frame are locked into a whole.

[0012] Preferably, an adjusting screw is rotatably provided inside the rotating shaft of the inner rotating frame, a tapered sleeve is threadedly connected to the adjusting screw, the locking square rods are slidably connected to the tapered surface of the tapered sleeve, and the adjusting screw is locked together with the inner rotating frame through a pin.

[0013] Preferably, the end face gear is an incomplete gear structure, and a blocking member for abutting against the transmission gear is fixedly installed on the end face gear and located outside the tooth segment. The blocking member and the outer ring plate are jointly provided with an energy storage spring for pushing the end face gear to rotate.

[0014] Preferably, the energy storage assembly also includes a circular plate box fixedly mounted on the front side of the front ear plate, a cover is rotatably provided inside the circular plate box, an energy storage spring is provided between the cover and the rotating shaft of the outer ring plate, a plurality of positioning grooves are provided on the edge of the circular plate box at equal intervals along its circumference, an L-shaped plug plate is provided on the front side of the cover along its radial sliding direction, and a coil spring is provided between the L-shaped plug plate and the cover.

[0015] Preferably, a driven gear is fixedly installed on the outside of the rotating shaft of the outer ring plate, a movable plate is provided on the rear ear plate for sliding left and right, the movable plate is locked together with the ear plate by screws, and a rack for engaging with the driven gear is provided on the left side of the movable plate for sliding up and down, and a blocking rod is fixedly installed on the lower side of the rack.

[0016] Preferably, the slow-release assembly includes an escapement wheel fixedly mounted on the outside of the outer ring plate rotating shaft and the outside of the inner rotating frame rotating shaft, and the outer ring plate and the rear ear plate are hinged with an escapement fork through sliding position blocks, and push springs are provided between both sides of the escapement fork and the corresponding position blocks.

[0017] Preferably, the linkage assembly includes a bidirectional screw arranged along the axis of the inner rotating frame, two symmetrically arranged disc plates are arranged inside the inner rotating frame for axial sliding, and two symmetrically arranged T-shaped pieces are arranged at the center position inside the inner rotating frame for radial sliding. The disc plates and T-shaped pieces are respectively slidably connected to the No. 1 clamping plate and the No. 2 clamping plate at the corresponding positions through spring guide columns.

[0018] Preferably, one side surface of the T-shaped member is hinged with two symmetrically arranged connecting rods, and the two connecting rods on the same T-shaped member are hinged with the two disc plates respectively.

[0019] The beneficial effects of the present invention are as follows: 1. The present invention adopts the coordinated cooperation of the universal joint structure composed of the outer ring plate and the inner rotating frame in the reversing mechanism, the energy storage component, and the slow-release component, so that the PCB board can dynamically adjust the direction during the vibration process, simulating the multi-directional composite vibration in actual working conditions. Compared with the traditional single-direction vibration test, the vibration coverage dimension is significantly expanded, and the actual use scenario can be simulated more realistically, avoiding quality risks of the PCB board.

[0020] 2. The present invention adopts the linkage component of the clamping mechanism to control the alternating clamping of the No. 1 clamping plate and the No. 2 clamping plate, thereby quickly changing the clamping position of the PCB board. There is no need to manually disassemble or re-clamp the PCB board, and the clamping switching of different positions can be achieved, which shortens the clamping time and improves the efficiency of detection.

[0021] 3. The present invention uses a combination of an energy storage component and a slow-release component to adjust the initial posture of the PCB board on the storage table. After the PCB board is tested for direction change, it can also directly undergo long-term vibration testing in a preset working posture, thereby simulating the vibration resistance of the PCB board under normal conditions, making the test more in line with actual conditions. In addition, the composite working condition test and the conventional working condition test can be connected, eliminating the need to readjust the PCB board, further ensuring the efficiency of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be further described below with reference to the accompanying drawings and examples.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2 It is a structural schematic diagram of the reversing mechanism, clamping mechanism and storage platform in the present invention.

[0025] Figure 3 It is a cross-sectional view of the inner rotating frame and the clamping mechanism in the present invention.

[0026] Figure 4 It is a cross-sectional view of the inner rotating frame, the disc plate, the No. 1 clamping plate and the bidirectional screw in the present invention.

[0027] Figure 5 It is a cross-sectional view of the outer ring plate, inner rotating frame, cover and escape wheel in the present invention.

[0028] Figure 6 It is a cross-sectional view of the outer ring plate, inner rotating frame, transmission gear and locking unit in the present invention.

[0029] Figure 7 It is a partial cross-sectional view of the transmission gear, tapered sleeve, locking square rod and inner rotating frame in the present invention.

[0030] Figure 8 It is a partial structural diagram of the rear ear plate, escapement wheel, escapement fork and rack of the present invention.

[0031] In the figure: 1. vibrator; 2. reversing mechanism; 3. clamping mechanism; 11. storage table; 21. ear plate; 22. outer ring plate; 23. inner rotating frame; 24. energy storage assembly; 25. slow-release assembly; 26. circular plate box; 31. linkage assembly; 32. No. 1 splint; 33. No. 2 splint; 241. transmission gear; 242. locking unit; 243. end gear; 244. locking square rod; 245. adjusting screw; 246. tapered sleeve; 247. blocking member; 251. escape wheel; 252. position block; 253. escapement fork; 261. cover; 262. L-shaped plug plate; 263. driven gear; 264. moving plate; 265. rack; 266. blocking rod; 311. disc plate; 312. T-shaped member; 313. connecting rod; 314. bidirectional screw. DETAILED DESCRIPTION

[0032] The following embodiments of the present invention are described in detail. The embodiments described below are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, the techniques or conditions described in the literature in the art or in the product specifications shall be followed.

[0033] See Figure 1 and Figure 2 A PCB vibration testing device includes a vibration machine 1, which includes a storage platform 11 that vibrates up and down. The storage platform 11 is provided with a reversing mechanism 2 for continuously adjusting the arrangement direction of the PCB board during vibration, and a clamping mechanism 3 for quickly changing the position of the PCB board.

[0034] When vibration testing of PCB boards is required, the operator first places a batch of PCB boards inside the clamping mechanism 3, then adjusts the initial posture of the PCB boards through the reversing mechanism 2 so that the initial posture of the PCB boards corresponds to their working posture under normal working conditions, and then the operator manually stores energy for the rotation of the PCB boards through the reversing mechanism 2.

[0035] Then, the vibration machine 1 is started to continuously vibrate the PCB by moving the storage table 11 back and forth up and down. At the same time, the reversing mechanism 2 dynamically changes the posture of the PCB, thereby simulating a composite working condition to test the vibration resistance of the PCB. When the PCB stops rotating, the PCB is placed in a preset initial posture, and then the PCB is continuously vibrated by the storage table 11, thereby simulating a conventional working condition to test the vibration resistance of the PCB.

[0036] After the vibration continues for a specified time, the moving storage platform 11 stops, and then the operator manually changes the clamping position of the PCB board quickly through the clamping mechanism 3, and then starts the vibration machine 1 again to vibrate the PCB board, thereby simulating the vibration resistance of the PCB board under different fixed positions.

[0037] Continue reading Figure 1 and Figure 2 The reversing mechanism 2 includes two ear plates 21 fixedly mounted on the upper side of the storage platform 11 and arranged symmetrically in front and back. An outer ring plate 22 is rotatably arranged between the two ear plates 21. An inner rotating frame 23 is rotatably arranged inside the outer ring plate 22 and combined with it to form a universal joint structure. It also includes an energy storage component 24 for storing energy for the rotation of the outer ring plate 22 and the inner rotating frame 23, and a slow-release component 25 for slowly rotating the outer ring plate 22 and the inner rotating frame 23.

[0038] See Figure 1 、 Figure 2 and Figure 3 The clamping mechanism 3 includes two No. 1 clamping plates 32 and two No. 2 clamping plates 33 arranged inside the inner rotating frame 23 through a linkage component 31. The linkage component 31 can control the No. 1 clamping plates 32 and the No. 2 clamping plates 33 to alternately clamp and fix the PCB board.

[0039] See Figure 2 、 Figure 3 and Figure 4 The linkage assembly 31 includes a bidirectional screw 314 that is arranged along the axis of the inner rotating frame 23, and two symmetrically arranged disc plates 311 are provided inside the inner rotating frame 23 for sliding along its axial direction. Two symmetrically arranged T-shaped pieces 312 are provided at the center position of the inner rotating frame 23 for sliding along its radial direction. The disc plate 311 and the T-shaped piece 312 are slidingly connected to the No. 1 clamping plate 32 and the No. 2 clamping plate 33 at the corresponding positions through spring guide columns. During detection, the energy storage assembly 24 and the slow-release assembly 25 cooperate to slowly rotate the outer ring plate 22 and the inner rotating frame 23, so that the inner rotating frame 23 can flexibly adjust the vibration direction of the PCB board in real time through the No. 1 clamping plate 32 or the No. 2 clamping plate 33.

[0040] See Figure 3One side of the T-shaped piece 312 is hinged to two symmetrically arranged connecting rods 313, and the two connecting rods 313 on the same T-shaped piece 312 are hinged to the two disc plates 311 respectively.

[0041] When vibration testing of PCB boards is required, the operator places the PCB boards in batches between the two No. 1 clamps 32, and then manually rotates the bidirectional screw 314 to drive the two discs 311 closer to each other. The discs 311 push the No. 1 clamp 32 to clamp the PCB boards through the spring guide columns at the corresponding positions, and at the same time compress the spring guide columns to the maximum amount.

[0042] When the two disc plates 311 approach each other, the connecting rod 313 pushes the T-shaped piece 312 at the corresponding position, so that the T-shaped piece 312 drives the two second clamping plates 33 away from each other through the spring guide column at the corresponding position, so that the first clamping plate 32 clamps the PCB board, while the second clamping plate 33 does not contact the PCB board.

[0043] It should be noted that a retaining groove for inserting the PCB board is provided on the side where the two No. 2 clamps 33 are close to each other and on the side where the two No. 1 clamps 32 are close to each other. The retaining grooves limit the PCB board, thereby increasing the degree of limitation of the PCB board, simplifying the clamping process of the PCB board, and preventing the PCB board from falling during vibration.

[0044] See Figure 2 and Figure 6 The energy storage assembly 24 includes a transmission gear 241 rotatably arranged on the rotating shaft of the inner rotating frame 23, and a locking unit 242 is provided on the rotating shaft of the inner rotating frame 23 to lock the transmission gear 241 and the inner rotating frame 23 together. An end gear 243 is rotatably arranged inside the outer ring plate 22 and meshes with the transmission gear 241.

[0045] See Figure 6 and Figure 7 The locking unit 242 includes locking grooves that are evenly spaced along the circumference of the transmission gear 241 on its side surface, and a number of locking square rods 244 that slide radially are evenly spaced along the circumference of the rotating shaft of the inner rotating frame 23. After the locking square rods 244 are inserted into the corresponding locking grooves, the transmission gear 241 and the inner rotating frame 23 are locked into a whole.

[0046] See Figure 1 、 Figure 5 and Figure 8 The slow-release assembly 25 includes an escapement wheel 251 fixedly mounted on the outside of the rotating shaft of the outer ring plate 22 and the outside of the rotating shaft of the inner rotating frame 23. The outer ring plate 22 and the rear ear plate 21 are hinged with an escapement fork 253 through a sliding position block 252, and a push spring is provided between the two sides of the escapement fork 253 and the corresponding position block 252.

[0047] See Figure 8 A driven gear 263 is fixedly installed on the outside of the rotating shaft of the outer ring plate 22, and a movable plate 264 is provided on the rear ear plate 21 for sliding left and right. The movable plate 264 is locked together with the ear plate 21 by screws. A rack 265 for engaging with the driven gear 263 is provided on the left side of the movable plate 264 for sliding up and down, and a blocking rod 266 is fixedly installed on the lower side of the rack 265.

[0048] In the initial state, the locking square rod 244 is not inserted into the locking groove, so that the transmission gear 241 can rotate freely on the rotating shaft of the inner rotating frame 23, and the position block 252 drives the escapement fork 253 at the corresponding position to move completely to the side of the escapement wheel 251 at the corresponding position, so that the escapement fork 253 cannot contact the escapement wheel 251 at the corresponding position, thereby preventing the escapement fork 253 from hindering the rotation of the escapement wheel 251. At the same time, the moving plate 264 drives the rack 265 to a position that is not engaged with the driven gear 263.

[0049] See Figure 6 and Figure 7 An adjusting screw 245 is provided inside the rotating shaft of the inner rotating frame 23, and a tapered sleeve 246 is threadedly connected to the adjusting screw 245. The locking square rod 244 is slidably connected to the tapered surface of the tapered sleeve 246, and the adjusting screw 245 is locked together with the inner rotating frame 23 through a pin.

[0050] The operator manually adjusts the posture of the inner rotating frame 23 so that the inner rotating frame 23 drives the PCB board inside it to adjust to the preset initial posture, and then the operator manually rotates the adjusting screw 245, and the adjusting screw 245 drives the locking square rod 244 through the tapered sleeve 246 to move away from the axis of the adjusting screw 245, so that the locking square rod 244 is respectively inserted into the corresponding locking groove, thereby locking the transmission gear 241 and the inner rotating frame 23 into a whole, and then the adjusting screw 245 and the inner rotating frame 23 are locked together by a pin to prevent the adjusting screw 245 from rotating without external force.

[0051] The operator then manually moves the movable plate 264 so that the movable plate 264 drives the rack 265 to engage with the driven gear 263, and then manually tightens the screws to lock the movable plate 264 and the rear ear plate 21 together, so that when the outer ring plate 22 rotates, the rack 265 can be pulled upward through the driven gear 263.

[0052] See Figure 2 and Figure 5The energy storage assembly 24 also includes a circular plate box 26 fixedly mounted on the front side of the front ear plate 21. A cover 261 is rotatably provided inside the circular plate box 26. An energy storage spring is provided between the cover 261 and the rotating shaft of the outer ring plate 22. A plurality of positioning grooves are provided on the edge of the circular plate box 26 at equal intervals along its circumference. An L-shaped plug 262 is provided on the front side of the cover 261 for radial sliding movement. A coil spring is provided between the L-shaped plug 262 and the cover 261.

[0053] When the movable plate 264 is locked together with the rear ear plate 21, the operator manually pulls the L-shaped plug plate 262 toward the center position of the cover 261, so that the L-shaped plug plate 262 is moved out from the positioning groove of the circular plate box 26, and then the operator manually rotates the cover 261 through the L-shaped plug plate 262, so that the cover 261 winds up the energy storage spring of the circular plate box 26 to store energy, and then the operator manually moves the L-shaped plug plate 262 and inserts it into the corresponding positioning groove of the circular plate box 26 again, so that the cover 261 and the circular plate box 26 are fixedly connected together.

[0054] It should be noted that when rotating the cover 261 , the operator holds the outer ring plate 22 by hand to prevent the energy storage spring from directly driving the outer ring plate 22 to rotate.

[0055] See Figure 6 The end face gear 243 has an incomplete gear structure. Two blocking members 247 are fixedly installed on the end face gear 243, which are respectively located at the two end positions of the tooth segment of the blocking member 247. The blocking member 247 is used to abut against the transmission gear 241. The blocking member 247 and the outer ring plate 22 are jointly provided with an energy storage spring for pushing the end face gear 243 to rotate.

[0056] In the initial state, the elastic force of the energy storage spring pushes the end gear 243, so that the end gear 243 drives a blocking member 247 on it close to the energy storage spring to rest against the transmission gear 241. Therefore, when the transmission gear 241 and the inner rotating frame 23 are locked into a whole, the energy storage spring can limit the angle of the inner rotating frame 23 by pushing the transmission gear 241, so that the inner rotating frame 23 does not rotate on the outer ring plate 22 in the absence of external force, and the inner rotating frame 23 drives the PCB board to maintain a preset posture.

[0057] After the energy storage spring is wound up, the operator manually rotates the end gear 243, causing the end gear 243 to compress the energy storage spring and store energy, and causing the end gear 243 to drive a blocking member 247 on it away from the energy storage spring to rest against the transmission gear 241. At the same time, the end gear 243 drives the inner rotating frame 23 to rotate an integer number of circles through the transmission gear 241, which not only compresses the energy storage spring and stores energy, but also enables the inner rotating frame 23 to maintain a preset posture.

[0058] The operator then manually moves the position block 252, so that the position block 252 drives the escapement fork 253 at the corresponding position to move to a position that matches the escapement wheel 251 at the corresponding position, so that the escapement fork 253, the escapement wheel 251 and the push spring are combined into an escapement mechanism.

[0059] It should be noted that locking wedges corresponding to the position blocks 252 are slidably provided on the outer ring plate 22 and the rear ear plate 21, and a locking groove for inserting the locking wedges is provided on the position block 252. When the escapement fork 253 moves to a position matching the escapement wheel 251 at the corresponding position, the corresponding locking wedge moves and is inserted into the corresponding locking groove, thereby fixing the position of the escapement fork 253.

[0060] Then, the vibration machine 1 is started to perform vibration detection on the PCB board by moving the storage table 11 up and down. At the same time, the external force on the outer ring plate 22 and the end gear 243 is removed, so that the energy storage spring pushes the end gear 243 through its own elastic force to drive the inner rotating frame 23 to rotate. At the same time, the energy storage spring drives the outer ring plate 22 to rotate through its own elastic force, and the outer ring plate 22 drives the inner rotating frame 23 to rotate, so that the inner rotating frame 23 drives the PCB board inside it to adjust its position and posture at multiple angles, simulating the multi-directional composite vibration scenario in actual working conditions for detection.

[0061] When the outer ring plate 22 rotates relative to the ear plate 21, the escapement mechanism on the ear plate 21 limits the rotation speed of the outer ring plate 22, so that the outer ring plate 22 rotates slowly. Similarly, the escapement mechanism on the outer ring plate 22 makes the inner rotating frame 23 rotate slowly relative to the outer ring plate 22, thereby preventing the PCB board in the inner rotating frame 23 from rotating quickly to the initial posture, thereby ensuring the detection time under multi-directional composite vibration conditions.

[0062] When a blocking member 247 close to the energy storage spring rests against the transmission gear 241 again, the inner rotating frame 23 stops after rotating an integer number of circles relative to the outer ring plate 22. When the rack 265 drives the blocking rod 266 to rest against the driven gear 263, the driven gear 263 stops because it can no longer drive the rack 265 to move, causing the outer ring plate 22 to stop rotating synchronously. At this time, the outer ring plate 22 also rotates an integer number of circles relative to the initial posture, so that the inner rotating frame 23 stops rotating and drives the PCB board inside it to the preset initial posture.

[0063] Then, the PCB board is vibrated by the vibration machine 1 to simulate the conventional unidirectional vibration scenario in actual working conditions. After the specified detection time, the vibration machine 1 is stopped and the bidirectional screw 314 is manually reversed so that the bidirectional screw 314 drives the two discs 311 away from each other. At the same time, the disc 311 pulls the two T-shaped pieces 312 closer to each other through the connecting rod 313.

[0064] When the two disc plates 311 move away from each other, the spring guide column on the disc plate 311 still drives the No. 1 clamping plate 32 to press against the PCB board through its own elastic force, and when the No. 1 clamping plate 32 is not out of contact with the PCB board, the T-shaped piece 312 drives the No. 2 clamping plate 33 to clamp the PCB board, thereby preventing the PCB board from falling during the repositioning and clamping. The operator continues to rotate the two-way screw 314, thereby causing the No. 1 clamping plate 32 to disengage from the PCB board and the No. 2 clamping plate 33 to clamp the PCB board, thereby quickly completing the repositioning and clamping of the PCB board, and then performing vibration detection again, the principle is the same as above.

[0065] After the specified time of testing, the vibration machine 1 is stopped, and the operator visually observes or conducts a power test to determine whether the PCB board is in the same condition as before the test. If so, the vibration test is qualified, otherwise it fails.

[0066] See Figures 1 to 8 When performing vibration detection on PCB boards, the present invention also includes the following steps: In the first step, the operator places the PCB boards in batches between the two No. 1 clamps 32, and then the operator manually rotates the bidirectional screw 314 to drive the No. 1 clamp 32 to clamp the PCB boards, and at the same time compresses the spring guide column to the maximum amount.

[0067] In the second step, the operator manually adjusts the inner rotating frame 23 to a preset posture, and then the operator manually rotates the adjusting screw 245 to drive the locking square rod 244 to be inserted into the corresponding locking groove, thereby locking the transmission gear 241 and the inner rotating frame 23 into a whole, preventing the adjusting screw 245 from rotating without external force.

[0068] In the third step, the operator manually moves the movable plate 264 so that the movable plate 264 drives the rack 265 to engage with the driven gear 263, and then manually tightens the screws to lock the movable plate 264 and the rear ear plate 21 together, so that when the outer ring plate 22 rotates, the rack 265 can be pulled upward through the driven gear 263.

[0069] In the fourth step, the operator manually pushes the L-shaped insert plate 262 out of the locking slot and manually rotates the cover 261 to wind up the energy storage spring to store energy. Then the operator manually moves the L-shaped insert plate 262 and inserts it into the corresponding locking slot of the circular plate box 26 again, so that the cover 261 and the circular plate box 26 are fixedly connected together.

[0070] In the fifth step, the operator manually rotates the end gear 243 to compress the energy storage spring to store energy, and the end gear 243 drives a blocking member 247 away from the energy storage spring to rest against the transmission gear 241. The operator manually moves the position block 252, so that the escapement fork 253, the escapement wheel 251 and the push spring are combined into an escapement mechanism.

[0071] In the sixth step, the vibration machine 1 is started to perform vibration detection on the PCB board. At the same time, the external force on the outer ring plate 22 and the end gear 243 is removed, so that the inner rotating frame 23 drives the PCB board inside it to adjust its position and posture at multiple angles, simulating the multi-directional composite vibration scenario in actual working conditions for detection.

[0072] In the seventh step, after the inner rotating frame 23 stops rotating, it drives the PCB board inside it to a preset initial posture, and continues to vibrate the PCB board through the vibration machine 1, thereby simulating the conventional unidirectional vibration scene in the actual working condition for detection. After the detection time is specified, the vibration machine 1 is stopped.

[0073] In the eighth step, the bidirectional screw 314 is manually reversed to disengage the No. 1 clamp 32 from the PCB and clamp the No. 2 clamp 33, thereby quickly completing the repositioning and clamping of the PCB. Then, steps 2 to 7 are repeated. The operator visually observes or conducts a power-on test to determine whether the PCB is in the same condition as before the test. If so, the anti-vibration test passes; otherwise, it fails.

[0074] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention, which are still covered by the scope of protection of the present invention.

Claims

1. A PCB vibration test device, comprising a vibration machine, wherein the vibration machine comprises a storage table that vibrates up and down, characterized in that: The storage table is equipped with a reversing mechanism for continuously adjusting the layout direction of the PCB board during vibration, as well as a clamping mechanism for quickly changing the position and clamping the PCB board; The reversing mechanism includes two ear plates fixedly mounted on the upper side of the storage platform and arranged symmetrically in front and back, an outer ring plate is rotatably arranged between the two ear plates, an inner rotating frame is rotatably arranged inside the outer ring plate and combined with the inner rotating frame to form a universal joint structure, and also includes an energy storage component for storing energy for the rotation of the outer ring plate and the inner rotating frame, and a slow-release component for slowly rotating the outer ring plate and the inner rotating frame; The clamping mechanism includes two No. 1 clamping plates and two No. 2 clamping plates arranged inside the inner rotating frame through a linkage assembly. The linkage assembly can control the No. 1 clamping plates and the No. 2 clamping plates to alternately clamp and fix the PCB board; During testing, the energy storage component and the slow-release component work together to slowly rotate the outer ring plate and the inner rotating frame, so that the inner rotating frame can flexibly adjust the vibration direction of the PCB board in real time through the No. 1 clamping plate or the No. 2 clamping plate; The energy storage assembly includes a transmission gear rotatably arranged on the rotating shaft of the inner rotating frame, a locking unit is provided on the rotating shaft of the inner rotating frame to lock the transmission gear and the inner rotating frame together, and an end gear is rotatably arranged inside the outer ring plate to mesh with the transmission gear; The end face gear is an incomplete gear structure. A blocking member for abutting against the transmission gear is fixedly installed on the end face gear and located outside the tooth segment. An energy storage spring for pushing the end face gear to rotate is provided on the blocking member and the outer ring plate. The slow-release assembly includes an escapement wheel fixedly mounted on the outside of the outer ring plate rotating shaft and the outside of the inner rotating frame rotating shaft. The outer ring plate and the rear ear plate are hinged with an escapement fork through sliding position blocks, and push springs are provided between the two sides of the escapement fork and the corresponding position blocks.

2. A PCB board vibration testing device according to claim 1, characterized in that, The locking unit includes locking grooves arranged on the side surface of the transmission gear at equal intervals along the circumference thereof, and a plurality of locking square rods sliding radially are arranged on the rotating shaft of the inner rotating frame at equal intervals along the circumference thereof. After the locking square rods are inserted into the corresponding locking grooves, the transmission gear and the inner rotating frame are locked into a whole.

3. A PCB board vibration testing device according to claim 2, characterized in that, An adjusting screw is provided for rotation inside the rotating shaft of the inner rotating frame. A tapered sleeve is threadedly connected to the adjusting screw. The locking square rods are slidably connected to the tapered surface of the tapered sleeve. The adjusting screw is locked together with the inner rotating frame through a pin.

4. A PCB board vibration testing device according to claim 1, characterized in that, The energy storage assembly also includes a circular plate box fixedly mounted on the front side of the front ear plate, a cover is rotatably provided inside the circular plate box, an energy storage spring is provided between the cover and the rotating shaft of the outer ring plate, a plurality of positioning grooves are provided on the edge of the circular plate box at equal intervals along its circumference, an L-shaped plug is provided on the front side of the cover for radial sliding movement, and a coil spring is provided between the L-shaped plug and the cover.

5. A PCB board vibration testing device according to claim 1, characterized in that, A driven gear is fixedly installed on the outside of the rotating shaft of the outer ring plate, and a movable plate is provided on the rear ear plate for sliding left and right. The movable plate is locked together with the ear plate by screws. A rack for meshing with the driven gear is provided on the left side of the movable plate for sliding up and down, and a blocking rod is fixedly installed on the lower side of the rack.

6. A PCB board vibration testing device according to claim 1, characterized in that, The linkage assembly includes a bidirectional screw arranged along the axis of the inner rotating frame, two symmetrically arranged disc plates are arranged inside the inner rotating frame for sliding along its axial direction, and two symmetrically arranged T-shaped parts are arranged at the center position inside the inner rotating frame for sliding along its radial direction. The disc plates and T-shaped parts are respectively slidably connected to the No. 1 clamping plate and the No. 2 clamping plate at the corresponding positions through spring guide columns.

7. A PCB board vibration testing device according to claim 6, characterized in that, One side surface of the T-shaped piece is hinged to two symmetrically arranged connecting rods, and the two connecting rods on the same T-shaped piece are hinged to the two disc plates respectively.

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