PCB vibration testing device

Abstract

The invention relates to the technical field of PCB vibration detection, in particular to a PCB vibration testing device which comprises a vibration machine, the vibration machine comprises an object placing table which vibrates up and down in a reciprocating mode, and the object placing table is provided with a reversing mechanism which is used for continuously adjusting the arrangement direction of a PCB in the vibration process and a clamping mechanism which is used for rapidly changing positions and clamping the PCB. The universal joint structure formed by combining the outer ring plate and the inner rotating frame in the reversing mechanism is cooperated with the energy storage assembly and the slow release assembly, so that the direction of the PCB can be dynamically adjusted in the vibration process, multi-directional composite vibration in the actual working condition is simulated, and compared with a traditional single-direction vibration test, the vibration coverage dimension is remarkably expanded, and the test efficiency is improved. Compared with the prior art, an actual use scene can be simulated more truly, potential quality hazards of the PCB are avoided, the linkage assembly of the clamping mechanism is adopted to control alternate clamping of the first clamping plate and the second clamping plate, and therefore rapid transposition clamping is conducted on the PCB, and the detection efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of PCB board vibration detection, and specifically to a PCB board vibration test device. Background Art

[0002] As the core carrier of electronic devices, PCB boards are widely used in fields such as consumer electronics, automotive electronics, and aerospace. Their reliability directly determines the performance and lifespan of end products. Since PCB boards may withstand complex mechanical vibrations during transportation, installation, or use, defects such as cracks and detachment are likely to occur in solder joints, laminated structures, and component fixings due to vibration stress. Therefore, vibration detection of PCB boards before leaving the factory to simulate mechanical loads under actual working conditions is a key link in evaluating their structural stability and reliability.

[0003] Currently, the industry generally uses vibrating machines to batch-detect PCB boards. Specifically, multiple PCB boards are fixed on the detection table of the vibrating machine, and their anti-vibration performance is tested by means of reciprocating vibration.

[0004] However, traditional vibrating machines can only achieve linear vibration in a single direction, while in actual applications, PCB boards may withstand multi-directional composite vibrations, such as tilting, rotating, or random vibrations. This limitation results in the test results being unable to fully reflect the failure risks of PCB boards under complex working conditions. Especially for PCB boards in high-precision or high-reliability fields, test blind spots may hide major quality hazards.

[0005] In addition, existing devices mostly use fixed clamps with a single clamping direction, and the clamping positions are preset in advance, and can only clamp the fixed positions of PCB boards. Therefore, it is necessary to re-clamp the PCB boards to simulate the anti-vibration performance of PCB boards at different locking positions. However, the method of re-clamping is cumbersome and complex, reducing the detection efficiency. Summary of the Invention

[0006] To solve the above technical problems, the technical solution adopted by the present invention is: a PCB board vibration test device, including a vibrating machine. The vibrating machine includes a placement table that reciprocates up and down. A reversing mechanism for continuously adjusting the layout direction of the PCB board during vibration and a clamping mechanism for quickly changing positions and clamping the PCB board are provided on the placement table.

[0007] The reversing mechanism includes two ear plates symmetrically arranged front and back and fixedly installed on the upper side of the placement table. An outer ring plate is rotatably arranged between the two ear plates. An inner rotating frame combined with it to form a universal joint structure is rotatably arranged inside the outer ring plate. 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 first clamping plates and two second clamping plates arranged inside the inner rotating frame through a linkage component. The first clamping plates and the second clamping plates can be controlled by the linkage component to alternately clamp and fix the PCB board.

[0009] During detection, 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 first clamping plate or the second clamping plate.

[0010] Preferably, the energy storage component includes a transmission gear rotatably arranged on the rotating shaft of the inner rotating frame. A locking unit for locking the transmission gear and the inner rotating frame together is arranged on the rotating shaft of the inner rotating frame. An end face gear meshing with the transmission gear is rotatably arranged inside the outer ring plate.

[0011] Preferably, the locking unit includes locking grooves opened on the side surface of the transmission gear at equal intervals along the circumferential direction. A plurality of locking square rods sliding radially along the circumferential direction are arranged on the rotating shaft of the inner rotating frame at equal intervals along the circumferential direction. 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 rod is rotatably arranged inside the rotating shaft of the inner rotating frame. A conical sleeve is threadedly connected to the adjusting screw rod. The locking square rods are all slidably connected to the conical surface of the conical sleeve. The adjusting screw rod is locked to the inner rotating frame through a pin.

[0013] Preferably, the end face gear has an incomplete gear structure. A blocking member for abutting against the transmission gear is fixedly installed on the end face gear and outside the tooth segment. An energy storage spring for pushing the end face gear to rotate is jointly arranged on the blocking member and the outer ring plate.

[0014] Preferably, the energy storage component further includes a circular plate box fixedly installed on the front side of the front ear plate. A cover is rotatably arranged inside the circular plate box. An energy storage spring is jointly arranged between the cover and the rotating shaft of the outer ring plate. A plurality of clamping grooves are opened on the edge of the circular plate box at equal intervals along the circumferential direction. An L-shaped insertion plate is slidably arranged on the front side of the cover along the radial direction. A spiral spring is arranged between the L-shaped insertion plate and the cover.

[0015] Preferably, a driven gear is fixedly installed outside the rotating shaft of the outer ring plate. A moving plate member is slidably arranged left and right on the rear ear plate. The moving plate member is locked to the ear plate through a screw. A rack for meshing with the driven gear is slidably arranged up and down on the left side of the moving plate member. A blocking rod is fixedly installed on the lower side of the rack.

[0016] Preferably, the slow release component includes escapement wheels fixedly installed outside the rotating shaft of the outer ring plate and outside the rotating shaft of the inner rotating frame. Escapement forks are hinged to the outer ring plate and the rear ear plate through slidably arranged position blocks. Pushing springs are arranged between both sides of the escapement forks and the corresponding position blocks.

[0017] Preferably, the linkage assembly includes a bidirectional screw rod rotatably arranged along the axis position of the inner rotating frame. Two symmetrically arranged disc plates are slidably arranged along the axial direction inside the inner rotating frame. Two symmetrically arranged T-shaped members are slidably arranged along the radial direction at the central position inside the inner rotating frame. The disc plates and the T-shaped members are slidably connected to the corresponding first clamping plates and second clamping plates through spring guide columns respectively.

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

[0019] The beneficial effects of the present invention are as follows: First, the present invention adopts the cooperation of the universal joint structure composed of the outer ring plate and the inner rotating frame in the commutation mechanism and the energy storage component and the slow release component, so that the PCB board can dynamically adjust its direction during vibration, simulate the multi-directional composite vibration in the actual working condition, and significantly expand the vibration coverage dimension compared with the traditional single-direction vibration test. It can more realistically simulate the actual use scenario and avoid potential quality hazards of the PCB board.

[0020] Second, the present invention adopts the linkage assembly of the clamping mechanism to control the alternating clamping of the first clamping plate and the second clamping plate, so as to quickly change the clamping position of the PCB board. Without manual disassembly or reinstallation of the PCB board, the clamping position can be switched, shortening the clamping time and improving the detection efficiency.

[0021] Third, the cooperation of the energy storage component and the slow release component of the present invention can also adjust the initial posture of the PCB board on the placement table, so that after the PCB board changes its direction for testing, it can directly perform long-term vibration detection in the preset working posture, thereby simulating the anti-vibration ability of the PCB board under normal circumstances, making the detection more in line with the actual situation, and the composite working condition detection and the conventional working condition detection can be carried out in connection, so that the PCB board does not need to be readjusted, further ensuring the detection efficiency. Description of the Drawings

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

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

[0024] Figure 2 It is a schematic diagram of the structure of the commutation mechanism, the clamping mechanism and the placement table 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 first clamping plate and the bidirectional screw rod 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 schematic diagram of the ear plate, escape wheel, escapement fork and rack at the rear part of the present invention.

[0031] In the figure: 1. Vibration machine; 2. Reversing mechanism; 3. Clamping mechanism; 11. Placing table; 21. Ear plate; 22. Outer ring plate; 23. Inner rotating frame; 24. Energy storage component; 25. Slow release component; 26. Circular plate box; 31. Linkage component; 32. First clamping plate; 33. Second clamping plate; 241. Transmission gear; 242. Locking unit; 243. End face gear; 244. Locking square rod; 245. Adjusting screw; 246. Tapered sleeve; 247. Blocking piece; 251. Escape wheel; 252. Position block; 253. Escapement fork; 261. Cover; 262. L-shaped insertion plate; 263. Driven gear; 264. Moving plate part; 265. Rack; 266. Blocking rod; 311. Disc plate; 312. T-shaped part; 313. Connecting rod; 314. Bidirectional screw. Detailed implementation manners

[0032] The embodiments of the present invention will be described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as a limitation to the present invention. For those not specified in the embodiments regarding specific technologies or conditions, they shall be carried out according to the technologies or conditions described in the literature in this field or according to the product instructions.

[0033] Refer to Figure 1 and Figure 2 , a PCB board vibration test device, including a vibration machine 1, the vibration machine 1 includes a placing table 11 that reciprocates up and down, and a reversing mechanism 2 for continuously adjusting the arrangement direction of the PCB board during vibration and a clamping mechanism 3 for quickly changing positions and clamping the PCB board are arranged on the placing table 11.

[0034] When vibration detection needs to be performed on the PCB board, first, the operator places a batch of PCB boards inside the clamping mechanism 3, and then adjusts the initial attitude of the PCB board through the reversing mechanism 2 so that the initial attitude of the PCB board corresponds to its working attitude under normal working conditions. Then, the operator manually stores energy for the rotation of the PCB board through the reversing mechanism 2.

[0035] Then, start the vibrator 1 to continuously vibrate the PCB board by moving the placement table 11 up and down reciprocally. At the same time, the commutation mechanism 2 dynamically changes the posture of the PCB board, so as to simulate the composite working conditions and detect the anti-vibration performance of the PCB board. When the rotation of the PCB board stops, make the PCB board in the preset initial posture, and then continuously vibrate the PCB board through the placement table 11, so as to simulate the conventional working conditions and detect the anti-vibration performance of the PCB board.

[0036] After the vibration lasts for a specified time, stop moving the placement table 11. Then, the operator manually quickly changes the clamping position of the PCB board through the clamping mechanism 3. Subsequently, start the vibrator 1 again to vibrate the PCB board, so as to simulate the anti-vibration performance of the PCB board under different fixed positions.

[0037] Continue to refer to Figure 1 and Figure 2 As shown in, the commutation mechanism 2 includes two ear plates 21 that are symmetrically arranged front and back and fixedly installed on the upper side of the placement table 11. An outer ring plate 22 is rotatably arranged between the two ear plates 21. An inner rotating frame 23 that forms a universal joint structure with it is rotatably arranged inside the outer ring plate 22. 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] Refer to Figure 1 、 Figure 2 and Figure 3 As shown in, the clamping mechanism 3 includes two first clamping plates 32 and two second clamping plates 33 arranged inside the inner rotating frame 23 through a linkage component 31. Through the linkage component 31, the first clamping plate 32 and the second clamping plate 33 can be controlled to alternately clamp and fix the PCB board.

[0039] Refer to Figure 2 、 Figure 3 and Figure 4 As shown in, the linkage component 31 includes a bidirectional screw 314 rotatably arranged along the axis position of the inner rotating frame 23. Two symmetrically arranged disk plates 311 are slidably arranged along the axial direction inside the inner rotating frame 23. Two symmetrically arranged T-shaped parts 312 are slidably arranged along the radial direction at the central position inside the inner rotating frame 23. The disk plates 311 and the T-shaped parts 312 are slidably connected to the corresponding first clamping plates 32 and second clamping plates 33 through spring guide columns respectively. During detection, the energy storage component 24 and the slow release component 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 first clamping plate 32 or the second clamping plate 33.

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

[0041] When vibration detection of the PCB board is required, the operator places the PCB boards in batches between the two first clamping plates 32, and then the operator manually rotates the bidirectional screw 314 to drive the two disc plates 311 to approach each other. The disc plates 311 push the first clamping plates 32 through the spring guide columns at corresponding positions to clamp the PCB board, and at the same time compress the spring guide columns to the maximum amount.

[0042] When the two disc plates 311 approach each other, they push the T-shaped member 312 at the corresponding position through the connecting rod 313, so that the T-shaped member 312 drives the two second clamping plates 33 to move away from each other through the spring guide columns at the corresponding positions, so that the first clamping plates 32 clamp the PCB board, while the second clamping plates 33 do not contact the PCB board.

[0043] It should be noted that on the sides where the two second clamping plates 33 approach each other and on the sides where the two first clamping plates 32 approach each other, card slots for inserting the PCB board are provided. By limiting the PCB board through the card slots, the limiting degree of the PCB board is increased, the clamping process of the PCB board is simplified, and at the same time, the PCB board is prevented from falling during vibration.

[0044] Refer to Figure 2 and Figure 6 , the energy storage component 24 includes a transmission gear 241 rotatably arranged on the rotating shaft of the inner rotating frame 23. A locking unit 242 for locking the transmission gear 241 and the inner rotating frame 23 together is arranged on the rotating shaft of the inner rotating frame 23. An end face gear 243 meshing with the transmission gear 241 is rotatably arranged inside the outer ring plate 22.

[0045] Refer to Figure 6 and Figure 7 , the locking unit 242 includes locking grooves equidistantly arranged along the circumferential direction on the side surface of the transmission gear 241. A plurality of locking square rods 244 sliding radially along its circumferential direction are arranged equidistantly along the circumferential direction on 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] Refer to Figure 1 , Figure 5 and Figure 8 , the slow release component 25 includes an escapement wheel 251 fixedly installed outside the rotating shaft of the outer ring plate 22 and outside the rotating shaft of the inner rotating frame 23. Escapement forks 253 are hinged to the outer ring plate 22 and the ear plates 21 at the rear through sliding position blocks 252. Push springs are arranged between both sides of the escapement forks 253 and the corresponding position blocks 252.

[0047] Refer to Figure 8 , a driven gear 263 is fixedly installed on the outer side of the rotating shaft of the outer ring plate 22, and a moving plate member 264 is slidably arranged left and right on the rear ear plate 21. The moving plate member 264 is locked to the ear plate 21 by screws. A rack 265 for meshing with the driven gear 263 is slidably arranged up and down on the left side of the moving plate member 264, 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 freely rotate on the rotating shaft of the inner rotating frame 23, and the position blocks 252 drive the corresponding escapement forks 253 to completely move to the side of the corresponding escapement wheels 251, so that the escapement forks 253 cannot contact the corresponding escapement wheels 251, thereby preventing the escapement forks 253 from interfering with the rotation of the escapement wheels 251. At the same time, the moving plate member 264 drives the rack 265 to be in a position not meshing with the driven gear 263.

[0049] Refer to Figure 6 and Figure 7 , an adjusting screw rod 245 is rotatably arranged inside the rotating shaft of the inner rotating frame 23. A tapered sleeve 246 is threadedly connected to the adjusting screw rod 245. The locking square rod 244 is slidably connected to the tapered surface of the tapered sleeve 246. The adjusting screw rod 245 is locked to the inner rotating frame 23 by a pin.

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

[0051] Then the operator manually moves the moving plate member 264 so that the moving plate member 264 drives the rack 265 to mesh with the driven gear 263. Subsequently, the moving plate member 264 is locked to the rear ear plate 21 by manually tightening the screws, so that when the outer ring plate 22 rotates, it can lift the rack 265 upward through the driven gear 263.

[0052] Refer to Figure 2 and Figure 5, the energy storage component 24 further includes a circular plate box 26 fixedly installed on the front side of the front ear plate 21. A cover 261 is rotatably arranged inside the circular plate box 26. An energy storage spring is jointly arranged between the cover 261 and the rotating shaft of the outer ring plate 22. A plurality of clamping slots are equidistantly arranged along the circumference on the edge of the circular plate box 26. An L-shaped insertion plate 262 is slidably arranged along the radial direction on the front side of the cover 261. A spiral spring is arranged between the L-shaped insertion plate 262 and the cover 261.

[0053] After the moving plate member 264 is locked with the rear ear plate 21, the operator manually pulls the L-shaped insertion plate 262 closer to the center position of the cover 261, so that the L-shaped insertion plate 262 is removed from the clamping slot of the circular plate box 26. Subsequently, the operator manually rotates the cover 261 through the L-shaped insertion plate 262, so that the cover 261 winds and stores energy for the energy storage spring of the circular plate box 26. Then, the operator manually moves the L-shaped insertion plate 262 and inserts it into the corresponding clamping slot of the circular plate box 26 again, so that the cover 261 is fixedly connected with the circular plate box 26.

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

[0055] Refer to Figure 6 , the end face gear 243 has an incomplete gear structure. Two stoppers 247 are fixedly installed on the end face gear 243 at two end positions of the tooth section of the stopper 247 respectively. The stopper 247 is used to abut against the transmission gear 241. An energy storage spring for pushing the end face gear 243 to rotate is jointly arranged between the stopper 247 and the outer ring plate 22.

[0056] In the initial state, the elastic force of the energy storage spring pushes the end face gear 243, so that the end face gear 243 drives one of the stoppers 247 close to the energy storage spring on it to abut 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 without external force, and further enables the inner rotating frame 23 to drive the PCB board to maintain a preset posture.

[0057] After winding and storing energy for the energy storage spring, the operator manually rotates the end face gear 243, so that the end face gear 243 compresses and stores energy for the energy storage spring, and makes the end face gear 243 drive one of the stoppers 247 far from the energy storage spring on it to abut against the transmission gear 241. At the same time, the end face gear 243 drives the inner rotating frame 23 to rotate an integer number of turns through the transmission gear 241, which not only compresses and stores energy for the energy storage spring, but also enables the inner rotating frame 23 to maintain a preset posture.

[0058] Subsequently, the operator manually moves the position block 252, causing the position block 252 to drive the escapement fork 253 at the corresponding position to move to a position matching 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 block 252 are slidably arranged on both the outer ring plate 22 and the rear ear plate 21. The position block 252 is provided with locking grooves for the locking wedges to insert. When the escapement fork 253 moves to a position matching the escapement wheel 251 at the corresponding position, the corresponding locking wedge moves and inserts into the corresponding locking groove, thereby fixing the position of the escapement fork 253.

[0060] Subsequently, the vibration machine 1 is started to perform vibration detection on the PCB board by reciprocating the placement table 11 up and down. At the same time, the external forces on the outer ring plate 22 and the end face gear 243 are removed, so that the energy storage spring pushes the end face 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. 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 the position and attitude at multiple angles, simulating the scenario of multi-directional composite vibration in the actual working condition for detection.

[0061] When the outer ring plate 22 rotates relative to the ear plate 21, the rotation speed of the outer ring plate 22 is restricted by the escapement mechanism on the ear plate 21, so that the outer ring plate 22 rotates slowly. Similarly, the inner rotating frame 23 rotates slowly relative to the outer ring plate 22 through the escapement mechanism on the outer ring plate 22, thereby preventing the PCB board in the inner rotating frame 23 from quickly rotating to the initial attitude and ensuring the detection time under the multi-directional composite vibration working condition.

[0062] When a blocking member 247 close to the energy storage spring abuts 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 abut against the driven gear 263, the driven gear 263 stops because it cannot drive the rack 265 to move continuously, 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 attitude, and then the inner rotating frame 23 drives the PCB board inside it to be in the preset initial attitude after stopping rotating.

[0063] Subsequently, the vibration detection of the PCB board is continued through the vibration machine 1 to simulate the conventional single-direction vibration scenario in the actual working condition for detection. After the specified detection time, the vibration machine 1 is stopped, and the bidirectional screw 314 is manually reversed, causing the bidirectional screw 314 to drive the two disk plates 311 to move away from each other. At the same time, the disk plates 311 pull the two T-shaped members 312 closer to each other through the connecting rods 313.

[0064] When the two disc plates 311 move away from each other, the spring guide posts on the disc plates 311 still drive the first clamping plate 32 to abut against the PCB board by their own elastic force. And when the first clamping plate 32 has not disengaged from the PCB board, the T-shaped part 312 drives the second clamping plate 33 to clamp the PCB board, thus preventing the PCB board from falling during the transposition clamping. The operator continues to rotate the bidirectional screw 314, so that the first clamping plate 32 disengages from the PCB board, and the second clamping plate 33 clamps the PCB board, thus quickly completing the transposition clamping of the PCB board. Then, vibration detection is carried out again, and the principle is the same as above.

[0065] After detecting for a specified time, stop the vibrator 1. The operator judges whether the PCB board is in the same condition as before the detection by means of visual observation or power-on test. If it is the same, the anti-vibration detection is qualified; otherwise, it is unqualified.

[0066] Refer to Figures 1 to 8 , when the present invention performs vibration detection on the PCB board, the following steps are further included: First step, the operator places the PCB boards in batches between the two first clamping plates 32. Then, the operator manually rotates the bidirectional screw 314 to drive the first clamping plates 32 to clamp the PCB board, and at the same time compresses the spring guide posts to the maximum amount.

[0067] Second step, the operator manually adjusts the inner rotating frame 23 to a preset posture. Then, the operator manually rotates the adjusting screw 245 to drive the locking square rod 244 to insert 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] Third step, the operator manually moves the moving plate member 264, so that the moving plate member 264 drives the rack 265 to engage with the driven gear 263. Then, the moving plate member 264 is locked together with the rear ear plate 21 by manually tightening the screw, so that when the outer ring plate 22 rotates, it can lift the rack 265 upward through the driven gear 263.

[0069] Fourth step, the operator manually pushes the L-shaped insertion plate 262 out of the clamping position groove, and manually rotates the cover 261 to wind up and store energy for the energy storage spring. Then, the operator manually moves the L-shaped insertion plate 262 and inserts it into the corresponding clamping position groove of the circular plate box 26 again, so that the cover 261 is fixedly connected to the circular plate box 26.

[0070] Fifth step, the operator manually rotates the end face gear 243 to compress and store energy for the energy storage spring, and makes the end face gear 243 drive a blocking member 247 on it far away from the energy storage spring to abut 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 pushing spring form an escapement mechanism.

[0071] Step 6: Start the vibrator 1 to perform vibration detection on the PCB board. At the same time, remove the external forces on the outer ring plate 22 and the end face gear 243, so that the inner rotating frame 23 drives the PCB board inside it to adjust the position and posture at multiple angles, simulating the multi-directional composite vibration scenario in the actual working condition for detection.

[0072] Step 7: After the inner rotating frame 23 stops rotating, drive the PCB board inside it to be in the preset initial posture, and continue to perform vibration detection on the PCB board through the vibrator 1, so as to simulate the conventional unidirectional vibration scenario in the actual working condition for detection. After detecting for the specified time, stop the vibrator 1.

[0073] Step 8: Manually reverse the bidirectional screw 314 to make the first clamping plate 32 disengage from the PCB board, and the second clamping plate 33 clamp the PCB board, so as to quickly complete the replacement clamping of the PCB board. Then repeat steps 2 to 7, and the operator judges whether the PCB board is the same as before the detection by visual observation or power-on test. If it is the same, the anti-vibration detection is qualified; otherwise, it is unqualified.

[0074] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention, and still be covered by the protection scope of the present invention.

Claims

1. A PCB board vibration test device, comprising a vibrating machine, the vibrating machine includes a placing table that vibrates reciprocally up and down, and is characterized in that, A reversing mechanism for continuously adjusting the layout direction of the PCB board during vibration and a clamping mechanism for quickly replacing and clamping the PCB board are provided on the placement table; The reversing mechanism includes two ear plates symmetrically arranged front and back and fixedly installed on the upper side of the placement table. An outer ring plate is rotatably arranged between the two ear plates. An inner rotating frame combined with it to form a universal joint structure is rotatably arranged inside the outer ring plate. 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; The clamping mechanism includes two first clamping plates and two second clamping plates arranged inside the inner rotating frame through a linkage component. The first clamping plates and the second clamping plates can be controlled by the linkage component to alternately clamp and fix the PCB board; During detection, 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 first clamping plate or the second clamping plate.

2. The PCB board vibration test device according to claim 1, wherein The energy storage component includes a transmission gear rotatably arranged on the rotating shaft of the inner rotating frame. A locking unit for locking the transmission gear and the inner rotating frame together is arranged on the rotating shaft of the inner rotating frame. An end face gear meshing with the transmission gear is rotatably arranged inside the outer ring plate.

3. The PCB board vibration test device according to claim 2, characterized in that, The locking unit includes locking grooves opened at equal intervals along the circumferential direction on the side surface of the transmission gear. A number of locking square rods sliding radially along the circumferential direction are arranged on the rotating shaft of the inner rotating frame at equal intervals along its circumferential direction. 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.

4. The PCB board vibration testing device according to claim 3, wherein, An adjusting screw is rotatably arranged inside the rotating shaft of the inner rotating frame. A tapered sleeve is threadedly connected to the adjusting screw. The locking square rods are all slidably connected to the tapered surface of the tapered sleeve. The adjusting screw is locked to the inner rotating frame through a pin.

5. The PCB board vibration testing device according to claim 2, characterized in that, The end face gear has an incomplete gear structure. A blocking piece for abutting against the transmission gear is fixedly installed on the end face gear and outside the tooth section. An energy storage spring for pushing the end face gear to rotate is jointly arranged on the blocking piece and the outer ring plate.

6. The PCB board vibration test device according to claim 1, characterized in that, The energy storage component also includes a circular plate box fixedly installed on the front side of the front ear plate. A cover is rotatably arranged inside the circular plate box. An energy storage spring is jointly arranged between the cover and the rotating shaft of the outer ring plate. A number of clamping grooves are opened at equal intervals along the circumferential direction on the edge of the circular plate box. An L-shaped insertion plate is slidably arranged radially on the front side of the cover. A spiral spring is arranged between the L-shaped insertion plate and the cover.

7. The PCB board vibration testing device according to claim 1, wherein A driven gear is fixedly installed outside the rotating shaft of the outer ring plate. A moving plate member is slidably arranged left and right on the rear ear plate. The moving plate member is locked to the ear plate through a screw. A rack for meshing with the driven gear is slidably arranged up and down on the left side of the moving plate member. A blocking rod is fixedly installed on the lower side of the rack.

8. A PCB board vibration testing device according to claim 1, characterized in that, The slow release component includes escapement wheels fixedly installed outside the rotating shaft of the outer ring plate and outside the rotating shaft of the inner rotating frame. Escapement forks are hinged to the outer ring plate and the rear ear plate through slidably arranged position blocks. Push springs are arranged between both sides of the escapement forks and the corresponding position blocks.

9. A PCB board vibration test device according to claim 1, characterized in that, The linkage assembly includes a bidirectional screw rotatably arranged along the axis position of the inner rotating frame. Two symmetrically arranged disk plates are slidably arranged along the axial direction inside the inner rotating frame. Two symmetrically arranged T-shaped members are slidably arranged along the radial direction at the central position inside the inner rotating frame. The disk plates and the T-shaped members are respectively slidably connected to the corresponding first clamping plates and second clamping plates through spring guide columns.

10. A PCB board vibration test device according to claim 9, characterized in that, Two symmetrically arranged connecting rods are hinged to one side surface of the T-shaped member. The two connecting rods on the same T-shaped member are respectively hinged to the two disk plates.

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