Product compression rebound test device

Abstract

The invention relates to the technical field of product performance testing, in particular to a product compression springback testing device which comprises a rack, a test bed is arranged on the rack, a pressure sensor is arranged on the test bed, a bearing block is arranged on the pressure sensor, stand columns are arranged on the test bed and located on the two sides of the bearing block, and the stand columns are arranged on the rack. A stand column is arranged on the rack, a cross beam is arranged on the stand column in a sliding mode, a lower pressing head is arranged on the bottom face of the cross beam, a displacement sensor is arranged on the cross beam and the test bed together, an upward pulling assembly used for applying upward pulling force to the cross beam is arranged on the stand column, and a downward pulling assembly used for applying downward pulling force to the cross beam is arranged in the rack. A jacking and supporting mechanism used for jacking and supporting the pull-down assembly is further arranged in the rack. According to the application, the test precision of the compression resilience performance of the gasket can be improved, so that the accuracy of the test result of the compression resilience performance of the gasket can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of product performance testing, and more particularly to a product compression and rebound test device. Background Art

[0002] With the popularization of electric vehicles, the safety and stability of electric vehicle batteries have become the focus of electric vehicle technology research and development. A gasket is usually provided on the surface of the battery of an electric vehicle as a key sealing and buffering component, and the performance of the gasket directly affects the use safety and service life of the battery.

[0003] Currently, in the electric vehicle industry, the performance requirements for the above-mentioned gasket are getting higher and higher, especially for the compression and rebound performance of the gasket, to ensure the stability and safety of the battery in different environments. After the existing gaskets are produced, a test device is usually used to detect the compression and rebound performance of the gaskets. The existing test device generally includes a base, a material placing seat placed on the base, and columns located on both sides of the material placing seat. A cross beam is slidably installed on the two columns together. A lower pressing plate is installed at the bottom of the cross beam. A lower pressing device is installed on the base, and the output end of the lower pressing device is connected to the cross beam. During the detection process, the operator places the gasket on the material placing seat, the lower pressing device drives the cross beam to descend, thereby driving the lower pressing plate to descend synchronously, and then applying a predetermined pressure to compress the gasket and maintaining it for a certain period of time to simulate the actual working condition. Then, the pressure is removed to allow the gasket to fully rebound. After that, a measuring tool is used to measure parameters such as the rebound amount of the gasket. Finally, based on these parameters, indexes such as the compression and rebound performance of the gasket can be calculated.

[0004] However, when using the above test device to detect some ultra-thin gaskets, since the self-weight of the cross beam will affect the load applied to the gasket by the lower pressing device, the test accuracy of the compression and rebound performance of the gasket by the test device will be reduced, and it is easy to cause inaccurate test results for the compression and rebound performance of the gasket. Summary of the Invention

[0005] In order to improve the test accuracy of the compression and rebound performance of the gasket, and thus improve the accuracy of the test results of the compression and rebound performance of the gasket, the present application provides a product compression and rebound test device.

[0006] The present application provides a product compression and rebound test device, adopting the following technical solutions: A product compression rebound test device comprises a frame, a test bench is arranged on the frame, a pressure sensor is arranged on the test bench, a supporting block is arranged on the pressure sensor, columns are arranged on both sides of the supporting block on the test bench, a cross beam is slidably arranged on the column, a downward pressure head is arranged on the bottom surface of the cross beam, a displacement sensor is arranged on the cross beam and the test bench, an upper pull component for applying an upward pulling force to the cross beam is arranged on the column, a lower pull component for applying a downward pulling force to the cross beam is arranged in the frame, and a supporting mechanism for supporting the lower pull component is also arranged in the frame.

[0007] By adopting the above technical solution, the use of the upper pull component helps to apply an upward pulling force to the beam, which helps to make the pulling force and the gravity of the beam offset each other, and try to avoid the influence of the gravity of the beam itself on the compression and rebound performance test of the gasket, thereby helping to improve the test accuracy of the compression and rebound performance of the gasket, and then help to improve the accuracy of the test results of the compression and rebound performance of the gasket. The use of the pull-down component helps to apply a downward pulling force to the beam, thereby helping to drive the lower pressure head to apply pressure to the gasket placed on the supporting block; the use of the supporting mechanism helps to support the pull-down component, thereby helping to release the downward pulling force applied by the pull-down component to the beam, thereby helping to facilitate the operator to lift the beam and the lower pressure head when placing the gasket, and also helps to remove the pressure applied by the lower pressure head to the gasket after the gasket is pressed down, which helps to make the gasket rebound after the pressure is completed. The use of pressure sensors helps to detect the pressure on the gasket, and the use of displacement sensors helps to detect the movement distance of the beam during the gasket compression process and the gasket rebound process, thereby helping to indirectly detect the compression and rebound amounts of the gasket, and further helping to calculate the compression and rebound properties of the gasket.

[0008] In a specific possible implementation scheme, the pulling assembly includes a mounting plate, a pulley, a pulling rope and a counterweight, wherein the mounting plate is arranged on the top of the column, the pulley is arranged on the mounting plate, the pulling rope is arranged on the pulley, one end of the pulling rope is connected to the cross beam, and the counterweight is arranged at the end of the pulling rope away from the cross beam.

[0009] By adopting the above technical scheme, the gravity of the counterweight itself is used to help apply an upward pulling force to the beam with the cooperation of the pulley and the pulling rope, which helps to offset the pulling force and the gravity of the beam itself, and minimizes the influence of the beam's own gravity on the compression rebound performance test of the gasket, thereby helping to improve the test accuracy of the compression rebound performance of the gasket, and further helping to improve the accuracy of the test results of the compression rebound performance of the gasket.

[0010] In a specific feasible implementation, the dropdown component includes a counterweight box, a hoisting rod, a connecting rod, and a fall prevention member. The counterweight box is disposed inside the frame. A kidney-shaped hole is provided on the side wall of the counterweight box. The end of the hoisting rod is inserted into the kidney-shaped hole. One end of the connecting rod is connected to the hoisting rod. The end of the connecting rod away from the hoisting rod penetrates through the cross beam. The fall prevention member is disposed on the connecting rod and above the cross beam.

[0011] By adopting the above technical solution, the gravity of the counterweight box itself helps to apply a downward pulling force on the cross beam in cooperation with the hoisting rod, the connecting rod, and the fall prevention member, thereby helping to drive the pressing head to apply pressure on the gasket placed on the supporting block, and further helping to compress the gasket under the action of the pressure.

[0012] In a specific feasible implementation, the top support mechanism includes a placement plate disposed inside the frame. A top support cylinder is provided on the placement plate. The piston rod of the top support cylinder extends towards the counterweight box. A top support plate is provided on the piston rod of the top support cylinder. The counterweight box is placed on the top support plate.

[0013] By adopting the above technical solution, the top support cylinder helps to drive the top support plate to support the counterweight box, thereby helping to relieve the downward pulling force applied by the counterweight box on the cross beam, and further helping to facilitate the operator to lift the cross beam and the pressing head when placing the gasket, and also helping to remove the pressure applied by the pressing head on the gasket after the pressing of the gasket is completed, and helping the gasket to rebound after being pressed.

[0014] In a specific feasible implementation, the top support mechanism includes a mounting frame. A bidirectional screw is rotatably provided on the mounting frame. The bidirectional screw is provided with two threaded segments with opposite thread rotation directions from the middle to both ends. Movable blocks are threadedly connected to both threaded segments of the bidirectional screw. Support arms are hingedly provided on the movable blocks. The end of the support arm away from the movable block is hingedly provided with a support plate. A guiding component for guiding the movement trajectory of the support plate is provided inside the mounting frame. A forward rotation driving component for driving the bidirectional screw to rotate forward is provided on the side wall at one end of the mounting frame. A reverse rotation driving mechanism for driving the bidirectional screw to rotate in the reverse direction is provided on the side wall at the other end of the mounting frame.

[0015] By adopting the above technical solution, the forward rotation drive assembly helps drive the bidirectional screw to rotate forward, thereby helping drive the two movable blocks to move horizontally synchronously towards the middle position of the bidirectional screw, and further helping drive the counterweight box to move upward in cooperation with the support arm and the support plate, which helps relieve the downward pulling force exerted by the counterweight box on the cross beam. When placing the gasket, it helps the operator lift the cross beam and the lower pressing head and place the gasket on the supporting block. After the gasket is pressed, it helps remove the pressure exerted by the lower pressing head on the gasket, and helps the gasket rebound after being pressed. The reverse rotation drive mechanism helps drive the bidirectional screw to rotate in the reverse direction, thereby helping drive the two movable blocks to move horizontally synchronously towards the direction away from the middle position of the bidirectional screw, and further helping drive the counterweight box to move downward gradually in cooperation with the support arm and the support plate, which helps gradually apply a downward pulling force on the cross beam in cooperation with the gravity of the counterweight box, and thus helps drive the lower pressing head to gradually apply pressure on the gasket. The guiding assembly helps guide the movement track of the support plate, thereby helping improve the stability during the movement of the support plate, and further helping improve the stability of the counterweight box during the lifting and lowering process.

[0016] In a specific feasible implementation, the forward rotation drive assembly includes a forward rotation drive motor, a driving gear, a driven gear, a ratchet tooth, a transmission pawl and a scroll spring. The forward rotation drive motor is arranged on the mounting frame. The driving gear is arranged on the output shaft of the forward rotation drive motor. The driven gear is rotatably arranged on the mounting frame and meshes with the driving gear. The driven gear is located on the outer periphery of the bidirectional screw and is coaxially arranged with the bidirectional screw. The ratchet tooth is arranged on the inner wall of the circumferential direction of the driven gear. The transmission pawl is rotatably arranged on the bidirectional screw. An installation through hole is arranged on the transmission pawl. The scroll spring is arranged on the bidirectional screw. The scroll spring is located inside the installation through hole, and one end of the scroll spring is connected to the hole wall of the installation through hole. An electromagnet for adsorbing the transmission pawl is arranged on one side of the bidirectional screw where the transmission pawl is located.

[0017] By adopting the above technical solution, the forward rotation drive motor helps drive the driving gear to rotate, thereby helping drive the driven gear to rotate. The scroll spring helps make the transmission pawl engage with the ratchet tooth tightly, thereby helping drive the bidirectional screw to rotate forward synchronously while the driven gear rotates, driving the two movable blocks to move horizontally synchronously towards the middle position of the bidirectional screw, and further helping drive the counterweight box to move upward in cooperation with the support arm and the support plate, which helps relieve the downward pulling force exerted by the counterweight box on the cross beam. When placing the gasket, it helps the operator lift the cross beam and the lower pressing head and place the gasket on the supporting block. After the gasket is pressed, it helps remove the pressure exerted by the lower pressing head on the gasket, and helps the gasket rebound after being pressed.

[0018] In a specific feasible implementation scheme, the reversal drive mechanism includes a connecting wheel arranged at the end of a bidirectional screw, a plurality of spaced-apart card interfaces are arranged on the circumference of the connecting wheel, a reversal drive motor is arranged on the mounting frame, a rotating wheel is arranged on the output shaft of the reversal drive motor, a notch is arranged on the rotating wheel, and a transmission assembly is arranged on the mounting frame for intermittently rotating the connecting wheel driven by the rotating wheel.

[0019] By adopting the above technical scheme, the reverse drive motor helps to drive the rotating wheel to rotate, and the transmission assembly helps to make the connecting wheel rotate intermittently under the drive of the rotating wheel, thereby helping to drive the bidirectional screw to rotate intermittently in the opposite direction, and driving the two movable blocks to move horizontally synchronously in the direction away from the middle position of the bidirectional screw, thereby helping to cooperate with the support arm and the support plate to drive the counterweight box to move gradually downward, and helping to cooperate with the gravity of the counterweight box to gradually apply downward pulling force to the crossbeam, thereby helping to drive the pressure head to gradually apply pressure to the gasket.

[0020] In a specific feasible implementation scheme, the transmission assembly includes a rotating plate, an abutment wheel, a toggle pawl and a positioning tooth, the rotating plate is rotatably set on a mounting frame, a coil spring 1 is arranged on the mounting frame, the coil spring 1 is coaxially arranged with the rotating shaft of the rotating plate and is connected to the rotating plate, the abutment wheel is arranged at one end of the rotating plate close to the rotating wheel, and the abutment wheel abuts against the circumferential side wall of the rotating wheel, the toggle pawl is rotatably set at one end of the rotating plate close to the connecting wheel, a coil spring 2 is arranged on the rotating plate, the coil spring 2 is coaxially arranged with the rotating shaft of the toggle pawl and is connected to the rotating pawl, and the positioning tooth is arranged on the rotating plate and is used to position the rotation position of the rotating wheel.

[0021] By adopting the above technical solution, the use of spiral spring 1 helps to make the abutment wheel abut against the circumferential surface of the rotating wheel; the use of the rotation of the rotating wheel helps to make the abutment wheel alternately abut against the circumferential surface of the rotating wheel and the surface of the notch position, thereby helping to drive the rotating plate to rotate back and forth, thereby helping to cooperate with the toggle pawl to toggle the connecting wheel, helping to make the connecting wheel and the bidirectional screw rotate intermittently in the opposite direction, driving the two movable blocks to move horizontally in a direction away from the middle position of the bidirectional screw synchronously, thereby helping to cooperate with the support arm and the support plate to drive the counterweight box to move gradually downward, helping to cooperate with the gravity of the counterweight box to gradually apply a downward pulling force to the crossbeam, thereby helping to drive the pressure head to gradually apply pressure to the gasket. The use of positioning teeth helps to locate the rotation position of the connecting wheel each time, thereby helping to improve the consistency of the rotation angle of the connecting wheel each time.

[0022] In a specific possible implementation scheme, the guide assembly includes a guide shaft, an axle support, a connecting plate and an auxiliary spring, the top end of the guide shaft is arranged on the bottom surface of the support plate, the guide shaft is slidably connected to the frame, the axle support is arranged in the frame and is located at the circumferential periphery of the guide shaft, the connecting plate is arranged at the bottom end of the guide shaft, the auxiliary spring is arranged on the connecting plate, and the end of the auxiliary spring away from the connecting plate is connected to the frame.

[0023] By adopting the above technical solution, the guide shaft and the shaft support are used to guide the moving trajectory of the support plate, thereby helping to improve the stability of the support plate during movement, and further helping to improve the stability of the counterweight box during lifting. The connecting plate and the auxiliary spring are used to apply an upward force to the guide shaft, thereby helping to support the four corners of the support plate in cooperation with the guide shaft, and further helping to improve the supporting effect of the support plate on the counterweight box.

[0024] In a specific possible implementation scheme, a plurality of limit baffles for limiting the horizontal displacement of the counterweight box are arranged in the frame, and the plurality of limit baffles are located at the peripheries of the four corners of the counterweight box body.

[0025] By adopting the above technical solution, the limit baffle is used to help limit the horizontal displacement of the counterweight box, thereby helping to prevent the counterweight box from shaking during the lifting process, and further helping to further improve the stability of the counterweight box during the lifting process.

[0026] In summary, the present application includes at least one of the following beneficial technical effects: 1. In the present application, the upper pull component, the lower pull component and the top support mechanism are arranged. The upper pull component helps to apply an upward pulling force to the crossbeam, helps to make the pulling force and the gravity of the crossbeam offset each other, and tries to avoid the influence of the gravity of the crossbeam itself on the compression rebound performance test of the gasket, thereby helping to improve the test accuracy of the compression rebound performance of the gasket, and further helps to improve the accuracy of the test results of the compression rebound performance of the gasket; the lower pull component helps to apply a downward pulling force to the crossbeam, thereby helping to drive the lower pressure head to apply pressure to the gasket placed on the supporting block; the top support mechanism helps to support the lower pull component, thereby helping to release the downward pulling force applied by the lower pull component to the crossbeam, thereby facilitating the operator to lift the crossbeam and the lower pressure head when placing the gasket, and also helps to remove the pressure applied by the lower pressure head to the gasket after the gasket is pressed down, and helps to make the gasket rebound after the pressure is completed; 2. By providing a forward rotation drive assembly and a reverse rotation drive mechanism in this application, the reverse rotation drive mechanism, in cooperation with the forward rotation drive assembly, helps drive the bidirectional screw to rotate in the reverse direction, thereby helping to drive the two movable blocks to horizontally move synchronously away from the middle position of the bidirectional screw, further helping to drive the counterweight box to gradually move downward in cooperation with the support arm and the support plate, and helping to gradually apply a downward pulling force on the cross beam in cooperation with the gravity of the counterweight box, thus minimizing the situation where the counterweight box drives the cross beam and the pressing head to quickly move downward, resulting in the pressing head exerting excessive pressure instantaneously, which helps prevent permanent deformation or damage to the gasket, and further helps improve the test effect of the compression and rebound performance of the gasket. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is the overall structural schematic diagram of Embodiment 1 of this application.

[0028] Figure 2 is Figure 1 the enlarged view of part A in

[0029] Figure 3 is the overall structural schematic diagram of Embodiment 2 of this application.

[0030] Figure 4 is the schematic diagram showing the specific mechanism of the top support mechanism in Embodiment 2 of this application.

[0031] Figure 5 is the schematic diagram showing the specific mechanism of the forward rotation drive assembly in Embodiment 2 of this application.

[0032] Figure 6 is Figure 5 the enlarged view of part B in

[0033] Figure 7 is the schematic diagram showing the specific mechanism of the reverse rotation drive mechanism in Embodiment 2 of this application.

[0034] Description of reference numerals: 1. Frame; 2. Test bench; 3. Pressure sensor; 4. Supporting block; 5. Column; 6. Cross beam; 7. Lower pressing head; 8. Displacement sensor; 9. Upper pulling assembly; 91. Mounting plate; 92. Pulley; 93. Pulling rope; 94. Counterweight; 10. Lower pulling assembly; 101. Counterweight box; 102. Hoisting rod; 103. Connecting rod; 104. Anti-falling member; 11. Waist-shaped hole; 12. Limit baffle; 13. Placing plate; 14. Jacking cylinder; 15. Jacking plate; 16. Mounting frame; 17. Bi-directional screw; 18. Movable block; 19. Support arm; 20. Support plate; 21. Guide assembly; 211. Guide shaft; 212. Shaft support; 213. Connecting plate; 214. Auxiliary spring; 22. Forward rotation drive assembly; 221. Forward rotation drive motor; 222. Driving gear; 223. Driven gear; 224. Ratchet teeth; 225. Driving pawl; 226. Volute spring; 23. Mounting through hole; 24. Connecting wheel; 25. Card interface; 26. Reverse rotation drive motor; 27. Rotating wheel; 28. Notch; 29. Transmission assembly; 291. Rotating plate; 292. Contact wheel; 293. Poking pawl; 294. Positioning teeth; 30. First helical spring; 31. Second helical spring; 32. Electromagnet. Detailed implementation manners

[0035] The following further elaborates on this application with reference to the accompanying drawings.

[0036] Embodiment 1: The embodiment of this application discloses a product compression and resilience test device. Refer to Figure 1 and Figure 2 and it includes a frame 1. A test bench 2 is fixedly installed on the top surface of the frame 1. A pressure sensor 3 is fixedly installed on the top surface of the test bench 2, and a supporting block 4 is fixed on the pressure sensor 3. Two columns 5 are symmetrically installed on both sides of the supporting block 4 on the test bench 2. A cross beam 6 is slidably sleeved on the two columns 5 together. A lower pressing head 7 is fixedly installed on the bottom surface of the cross beam 6 directly above the supporting block 4. A displacement sensor 8 is jointly installed on the top surface of the test bench 2 and the bottom surface of the cross beam 6.

[0037] Refer to Figure 1 and a upper pulling assembly 9 is jointly arranged on the two columns 5. The upper pulling assembly 9 includes a mounting plate 91, pulleys 92, pulling ropes 93 and counterweights 94. In this embodiment, there are two sets of pulleys 92, pulling ropes 93 and counterweights 94. The mounting plate 91 is horizontally and fixedly installed at the top ends of the two columns 5. The two sets of pulleys 92 are rotatably installed on the top surface of the mounting plate 91 and symmetrically distributed on the mounting plate 91. The pulling ropes 93 are slidably placed on the pulleys 92. One end of the pulling rope 93 is fixedly connected to the top surface of the cross beam 6, and the counterweight 94 is installed at the end of the pulling rope 93 away from the cross beam 6.

[0038] Refer toFigure 1 , a top support mechanism is arranged inside the frame 1. The top support mechanism includes a placement plate 13 fixedly installed inside the frame 1. A top support cylinder 14 is fixedly installed on the bottom surface of the placement plate 13. The piston rod of the top support cylinder 14 penetrates upward through the placement plate 13, and a horizontally placed top support plate 15 is fixedly installed at the top end of the piston rod of the top support cylinder 14.

[0039] Refer to Figure 1 , a downward pulling assembly 10 is further arranged inside the frame 1. The downward pulling assembly 10 includes a counterweight box 101, a lifting rod 102, a connecting rod 103, and an anti-falling member 104. In this embodiment, the anti-falling member 104 is a fixing nut; two sets of lifting rods 102, connecting rods 103, and fixing nuts are provided. The counterweight box 101 is placed on the top support plate 15. Counterweight blocks are placed inside the counterweight box 101. Two sets of kidney-shaped holes 11 are penetrated through the opposite side walls of the counterweight box 101. The length direction of the kidney-shaped holes 11 is arranged along the vertical direction. Both ends of each lifting rod 102 are inserted and installed in a kidney-shaped hole 11. The connecting rod 103 is arranged vertically, and the bottom end of the connecting rod 103 is fixedly connected to the middle position of the lifting rod 102. The top end of the connecting rod 103 penetrates through the top wall of the frame 1, the test bench 2, and the cross beam 6 in sequence, and the fixing nut is fixedly connected to the connecting rod 103 and is located above the cross beam 6.

[0040] Refer to Figure 1 , limit baffle plates 12 are fixedly installed around the four corners of the counterweight box 101 inside the frame 1.

[0041] Refer to Figure 1 and Figure 2 , when testing the compression and rebound performance of the ultra-thin gasket, the operator starts the top support cylinder 14, and the piston rod of the top support cylinder 14 extends upward to lift the placement plate 13, thereby driving the counterweight box 101 placed on the placement plate 13 to move upward. Furthermore, the counterweight box 101 no longer applies a downward pulling force to the cross beam 6 through the lifting rod 102, the connecting rod 103, and the fixing nut, so that the cross beam 6 only receives an upward pulling force applied by the two counterweight weights 94 through the pulling rope 93, thereby allowing the operator to lift the cross beam 6 upward, so that the downward pressure head 7 and the supporting block 4 are separated from each other.

[0042] Refer to Figure 1 and Figure 2When the operator lifts the crossbeam 6 upward, the operator places the ultra-thin gasket cut into a fixed shape on the supporting block 4 at the same time, and then the operator slowly lowers the crossbeam 6 so that the lower pressure head 7 presses on the upper surface of the ultra-thin gasket. At this time, because the counterweight 94 applies an upward pulling force to the crossbeam 6 through the pulling rope 93, the gravity of the counterweight 94 and the gravity of the crossbeam 6 partially offset each other, so that the lower pressure head 7 does not cause deformation of the ultra-thin gasket when pressing on the upper surface of the ultra-thin gasket, and the influence of the gravity of the crossbeam 6 on the compression and rebound performance test of the gasket is avoided as much as possible, which helps to improve the test accuracy of the compression and rebound performance of the gasket, and further helps to improve the accuracy of the test results of the compression and rebound performance of the gasket.

[0043] Reference Figure 1 and Figure 2 The operator closes the supporting cylinder 14, and the piston rod of the supporting cylinder 14 is retracted downward, driving the placement plate 13 to move downward synchronously, thereby driving the counterweight box 101 placed on the placement plate 13 to move downward, and then the counterweight box 101 applies a downward pulling force to the crossbeam 6 through the lifting rod 102, the connecting rod 103 and the fixing nut, so that the crossbeam 6 drives the pressing head 7 to press down the ultra-thin gasket.

[0044] Reference Figure 1 and Figure 2 , after pressing down for a specified period of time, the operator starts the supporting cylinder 14, and the piston rod of the supporting cylinder 14 extends upward to lift the placement plate 13, thereby driving the counterweight box 101 placed on the placement plate 13 to move upward, so that the counterweight box 101 no longer applies a downward pulling force to the crossbeam 6 through the lifting rod 102, the connecting rod 103 and the fixing nut. At the same time, the compressed part of the ultra-thin gasket gradually rebounds, and drives the crossbeam 6 to move upward synchronously during the rebound process. In the aforementioned process, the pressure sensor 3 helps to detect the downward pressure value of the gasket, and the displacement sensor 8 helps to detect the downward movement distance of the crossbeam 6 during the compression of the gasket (i.e., the compression amount of the ultra-thin gasket) and the upward movement distance of the crossbeam 6 during the rebound of the gasket (i.e., the rebound amount of the ultra-thin gasket), thereby helping to accurately calculate the compression and rebound performance of the gasket.

[0045] In addition, when conducting compression rebound performance tests on ultra-thin gaskets of different thicknesses, the operator can adjust the weight of the counterweight block placed inside the counterweight box 101 and the weight of the counterweight weight 94, which helps make the adjusted test device suitable for ultra-thin gaskets of different thicknesses, thereby helping to improve the applicability of the test device.

[0046] Reference Figure 1In the process of the placement plate 13 driving the counterweight box 101 to rise and fall, the multiple limit baffles 12 help to limit the horizontal displacement of the counterweight box 101, thereby helping to prevent the counterweight box 101 from shaking during the lifting process, and further helping to improve the stability of the counterweight box 101 during the lifting process.

[0047] The implementation principle of the embodiment of the present application is: when testing the compression rebound performance of the ultra-thin gasket, the operator starts the supporting cylinder 14, and the piston rod of the supporting cylinder 14 extends upward to lift the placement plate 13, thereby driving the counterweight box 101 placed on the placement plate 13 to move upward, so that the counterweight box 101 no longer applies a downward pulling force to the beam 6 through the lifting rod 102, the connecting rod 103 and the fixing nut, so that the beam 6 is only subjected to the upward pulling force applied by the two counterweight weights 94 through the pulling rope 93, thereby allowing the operator to lift the beam 6 upward, so that the lower pressure head 7 and the supporting block 4 are separated from each other.

[0048] When the operator lifts the crossbeam 6 upward, the operator places the ultra-thin gasket cut into a fixed shape on the supporting block 4 at the same time, and then the operator slowly lowers the crossbeam 6 so that the lower pressure head 7 presses on the upper surface of the ultra-thin gasket. At this time, since the counterweight 94 applies an upward pulling force to the crossbeam 6 through the pulling rope 93, the gravity of the counterweight 94 and the gravity of the crossbeam 6 partially offset each other, so that the lower pressure head 7 does not cause deformation of the ultra-thin gasket when pressing on the upper surface of the ultra-thin gasket, and the influence of the gravity of the crossbeam 6 on the compression and rebound performance test of the gasket is avoided as much as possible, which helps to improve the test accuracy of the compression and rebound performance of the gasket, and further helps to improve the accuracy of the test results of the compression and rebound performance of the gasket.

[0049] The operator closes the supporting cylinder 14, and the piston rod of the supporting cylinder 14 is retracted downward, driving the placement plate 13 to move downward synchronously, thereby driving the counterweight box 101 placed on the placement plate 13 to move downward, and then the counterweight box 101 applies a downward pulling force to the crossbeam 6 through the lifting rod 102, the connecting rod 103 and the fixing nut, so that the crossbeam 6 drives the pressing head 7 to press down the ultra-thin gasket.

[0050] After pressing down for a specified duration, the operator activates the jacking cylinder 14. The piston rod of the jacking cylinder 14 extends upward, jacking up the placement plate 13, thereby driving the counterweight box 101 placed on the placement plate 13 to move upward. As a result, the counterweight box 101 no longer exerts a downward pulling force on the crossbeam 6 through the hoisting rod 102, connecting rod 103, and fixing nut. At the same time, the compressed part of the ultra-thin gasket gradually rebounds, and during the rebounding process, it drives the crossbeam 6 to move upward synchronously. During the above process, the pressure sensor 3 helps to detect the value of the downward pressure exerted on the gasket, the displacement sensor 8 helps to detect the downward displacement distance of the crossbeam 6 during the compression of the gasket - that is, the compression amount of the ultra-thin gasket, and the displacement sensor 8 also helps to detect the upward displacement distance of the crossbeam 6 during the rebound of the gasket - that is, the rebound amount of the ultra-thin gasket, thereby helping to accurately calculate the compression and rebound performance of the gasket.

[0051] Embodiment 2: Refer to Figure 3 and Figure 4 In this embodiment of the present application, the difference from Embodiment 1 is that the jacking mechanism includes a U-shaped mounting frame 16 fixedly installed in the frame 1. A bidirectional screw 17 is horizontally rotatably installed in the mounting frame 16. The bidirectional screw 17 has two thread segments with opposite thread directions from the middle position to both ends. Movable blocks 18 are threadedly connected to both thread segments of the bidirectional screw 17. A support arm 19 is hinged to each movable block 18. The tops of the two support arms 19 are jointly hinged to a horizontally arranged support plate 20. The counterweight box 101 is placed on the support plate 20.

[0052] Refer to Figure 3 and Figure 4 In the frame 1, multiple groups of guiding components 21 are provided. Each group of guiding components 21 includes a guiding shaft 211, a shaft support 212, a connecting plate 213, and an auxiliary spring 214. The top of the guiding shaft 211 is arranged on the bottom surface of the support plate 20. The guiding shaft 211 is slidably connected to the frame 1. The shaft support 212 is arranged in the frame 1 and is located on the outer periphery of the guiding shaft 211. The connecting plate 213 is fixedly installed at the bottom end of the guiding shaft 211. The auxiliary spring 214 is fixedly installed on the connecting plate 213. The auxiliary spring 214 is sleeved on the outer periphery of the guiding shaft 211 and the end of the auxiliary spring 214 away from the connecting plate 213 is fixedly connected to the frame 1.

[0053] Refer to Figure 4 and Figure 5, a forward rotation drive assembly 22 is provided on one side wall of the mounting bracket 16. The forward rotation drive assembly 22 includes a forward rotation drive motor 221, a driving gear 222, a driven gear 223, a transmission pawl 225, a scroll spring 226, and a plurality of ratchet teeth 224. In this embodiment, the transmission pawl 225 is made of a magnetic attraction material. The forward rotation drive motor 221 is installed on the inner side wall of the mounting bracket 16. The driving gear 222 is fixedly installed on the output shaft of the forward rotation drive motor 221 and is located outside the mounting bracket 16. The driven gear 223 is rotatably installed on the outer side wall of the mounting bracket 16 and meshes with the driving gear 222.

[0054] Refer to Figure 5 and Figure 6 , a through hole is coaxially formed in the driven gear 223. One end of the bidirectional screw 17 is inserted into the through hole, and the bidirectional screw 17 is coaxially arranged with the driven gear 223. The plurality of ratchet teeth 224 are arranged adjacent to each other in sequence on the circumferential hole wall of the through hole. The transmission pawl 225 is rotatably installed on the bidirectional screw 17 and is located inside the through hole. An installation through hole 23 is formed in the transmission pawl 225. The scroll spring 226 is fixedly installed on the bidirectional screw 17. The scroll spring 226 is located inside the installation through hole 23, and one end of the scroll spring 226 is fixedly connected to the hole wall of the installation through hole 23. An electromagnet 32 is fixedly installed on the bidirectional screw 17 on one side of the transmission pawl 225.

[0055] Refer to Figure 3 , Figure 4 and Figure 6 , when testing the compression and rebound performance of the ultra-thin gasket, the operator starts the forward rotation drive motor 221. The output shaft of the forward rotation drive motor 221 drives the driving gear 222 to rotate, thereby driving the driven gear 223 to rotate synchronously under the meshing action. While the driven gear 223 rotates, the transmission pawl 225 is clamped and pressed against the ratchet teeth 224 under the elastic force of the scroll spring 226, so that the driven gear 223 drives the transmission pawl 225 to rotate synchronously while rotating, and further enables the bidirectional screw 17 to rotate synchronously in the forward direction under the drive of the transmission pawl 225. When the bidirectional screw 17 rotates forward, the two movable blocks 18 move horizontally towards the middle position of the bidirectional screw 17 under the combined action of the bidirectional screw 17 and the guide shaft 211, driving the two support arms 19 to lift the support plate 20, thereby driving the counterweight box 101 placed on the support plate 20 to move upward. Further, the counterweight box 101 no longer applies a downward pulling force to the cross beam 6 through the lifting rod 102, the connecting rod 103, and the fixing nut, so that the cross beam 6 is only subjected to an upward pulling force applied by the two counterweight weights 94 through the pulling rope 93, allowing the operator to lift the cross beam 6 upward, so that the pressing head 7 and the supporting block 4 are separated from each other.

[0056] Refer to Figure 3, when the operator lifts the cross beam 6 upward, the operator simultaneously places the ultra-thin gasket cut into a fixed shape on the supporting block 4, and then the operator slowly lowers the cross beam 6 so that the pressing head 7 presses on the upper surface of the ultra-thin gasket. At this time, since the counterweight 94 applies an upward pulling force to the cross beam 6 through the pulling rope 93, a part of the gravity of the counterweight 94 itself and the gravity of the cross beam 6 are offset from each other. As a result, when the pressing head 7 presses on the upper surface of the ultra-thin gasket, the ultra-thin gasket will not be deformed, and the influence of the gravity of the cross beam 6 itself on the compression and rebound performance test of the gasket is minimized, which helps to improve the test accuracy of the compression and rebound performance of the gasket, and further helps to improve the accuracy of the test results of the compression and rebound performance of the gasket.

[0057] Refer to Figure 3 and Figure 4 , when the support plate 20 moves in the vertical direction, the guide shaft 211 and the shaft support 212 help to guide the moving track of the support plate 20, which helps to improve the stability of the support plate 20 during movement, and further helps to improve the stability of the counterweight box 101 during lifting. When the bidirectional screw 17 rotates, the guide shaft 211 restricts the rotation of the support plate 20, which helps to restrict the rotation of the movable block 18 through the support arm 19, so that the movable block 18 can only move horizontally along the axial direction of the bidirectional screw 17.

[0058] Refer to Figure 4 and Figure 7 , on the side wall at the other end of the mounting frame 16, a reverse drive mechanism is provided. The reverse drive mechanism includes a connecting wheel 24 fixedly installed at the end of the bidirectional screw 17. A plurality of equally spaced card interfaces 25 are provided on the circumferential side wall of the connecting wheel 24. A reverse drive motor 26 is fixedly installed on the inner side wall of the mounting frame 16. The output shaft of the reverse drive motor 26 penetrates and extends out of the side wall of the mounting frame 16. A rotating wheel 27 is fixedly installed at the end of the output shaft of the reverse drive motor 26 extending out of the mounting frame 16. The rotating wheel 27 has a notch 28.

[0059] Refer to Figure 7A transmission assembly 29 is arranged on the outer wall of the mounting frame 16, and the transmission assembly 29 includes a rotating plate 291, an abutting wheel 292, a toggle pawl 293 and a positioning tooth 294. The rotating plate 291 is rotatably mounted on the mounting frame 16, and a coil spring 30 is fixedly mounted on the outer wall of the mounting frame 16. The coil spring 30 is coaxially arranged with the rotating shaft of the rotating plate 291 and one end of the coil spring 30 is fixedly connected to the rotating plate 291; the abutting wheel 292 is rotatably mounted on the rotating plate 291 is close to one end of the rotating wheel 27, and the abutting wheel 292 abuts against the circumferential side wall of the rotating wheel 27; the driving pawl 293 is rotatably installed on the end of the rotating plate 291 close to the connecting wheel 24, and a coil spring 231 is fixedly installed on the rotating plate 291. The coil spring 231 is coaxially arranged with the rotating shaft of the driving pawl 293 and one end of the coil spring 231 is fixedly connected to the rotating pawl, and the positioning tooth 294 is integrally formed on the side of the rotating plate 291 facing the connecting wheel 24.

[0060] Reference Figure 3 , Figure 4 and Figure 7 After the ultra-thin gasket is placed and the crossbeam 6 is lowered, the operator starts the reverse drive motor 26, and the output shaft of the reverse drive motor 26 drives the rotating wheel 27 to rotate. Through the rotation of the rotating wheel 27, the abutting wheel 292 alternately abuts against the circumferential surface of the rotating wheel 27 and the surface at the position of the notch 28, thereby driving the rotating plate 291 to swing back and forth at a fixed frequency; during the reciprocating swing of the rotating plate 291, the toggle pawl 293 is driven by the rotating plate 291 to sequentially snap into different card interfaces 25 and push the connecting wheel 24, thereby facilitating the intermittent reverse rotation of the connecting wheel 24 and the bidirectional screw 17. The positioning tooth 294 is driven by the rotating plate 291 to snap into the inside of the card interface 25, which helps to locate the rotation position of the connecting wheel 24 each time, thereby helping to improve the consistency of the rotation angle of the connecting wheel 24 each time.

[0061] Reference Figure 3 and Figure 4 When the bidirectional screw 17 rotates intermittently in the opposite direction, the two movable blocks 18 move horizontally in a direction away from the middle position of the bidirectional screw 17 synchronously under the joint action of the bidirectional screw 17 and the guide shaft 211, and the support plate 20 is driven to move gradually downward through the two support arms 19, thereby driving the counterweight box 101 placed on the support plate 20 to move gradually downward, and then the counterweight box 101 applies a downward pulling force to the crossbeam 6 through the lifting rod 102, the connecting rod 103 and the fixing nut, so that the crossbeam 6 drives the pressing head 7 to press down the ultra-thin gasket.

[0062] Reference Figure 3 , Figure 6 and Figure 7When the bidirectional screw 17 rotates reversely intermittently, the bidirectional screw 17 drives the transmission pawl 225 to rotate reversely synchronously and intermittently. During the reverse rotation of the transmission pawl 225, the electric magnet is energized, thereby adsorbing the transmission pawl 225, thereby preventing the transmission pawl 225 and the ratchet 224 on the driven gear 223 from getting stuck to each other; when the transmission pawl 225 completes one reverse rotation, the electric magnet is de-energized, releasing the adsorption of the transmission pawl 225, and under the action of the elastic force of the spiral spring 226 itself, the transmission pawl 225 is clamped and pressed against one ratchet 224, thereby preventing the transmission pawl 225 from getting stuck to each other with the ratchet 224 on the driven gear 223. The driven gear 223 is used to prevent the transmission pawl 225 and the bidirectional screw 17 from continuing to rotate; such a reciprocating cycle helps prevent the gravity of the counterweight box 101 from acting on the bidirectional screw 17 through the support plate 20, the support arm 19 and the movable block 18, thereby causing the bidirectional screw 17 to continue to rotate in the opposite direction, and minimizes the counterweight box 101 from moving downward rapidly, driving the cross beam 6 and the downward pressure head 7 to move downward rapidly, thereby causing the downward pressure head 7 to exert excessive pressure on the body in an instant, thereby helping to prevent permanent deformation or damage to the gasket, and further helping to improve the test effect of the gasket's compression rebound performance.

[0063] Reference Figure 3 and Figure 4 , after pressing down for a specified period of time, the operator starts the forward drive motor 221, thereby driving the counterweight box 101 placed on the support plate 20 to move upward again, so that the counterweight box 101 no longer applies downward pulling force to the crossbeam 6 through the lifting rod 102, the connecting rod 103 and the fixing nut, and at the same time, the compressed part of the ultra-thin gasket gradually rebounds, and drives the crossbeam 6 to move upward synchronously during the rebound process. In the above process, the pressure sensor 3 helps to detect the downward pressure value of the gasket, and the displacement sensor 8 helps to detect the downward movement distance of the crossbeam 6 during the gasket compression process (i.e., the compression amount of the ultra-thin gasket) and the upward movement distance of the crossbeam 6 during the gasket rebound process (i.e., the rebound amount of the ultra-thin gasket), thereby helping to accurately calculate the compression and rebound performance of the gasket.

[0064] The implementation principle of the embodiment of the present application is: the driven gear 223 is tightly engaged with the ratchet 224, so that the driven gear 223 drives the transmission pawl 225 to rotate synchronously while rotating, and then the bidirectional screw 17 is synchronously rotated forward under the drive of the transmission pawl 225. When the bidirectional screw 17 rotates forward, the two movable blocks 18 are synchronously moved horizontally toward the middle position of the bidirectional screw 17 under the joint action of the bidirectional screw 17 and the guide shaft 211, driving the two support arms 19 to lift the support plate 20, thereby driving the counterweight box 101 placed on the support plate 20 to move upward, and then the counterweight box 101 no longer applies a downward pulling force to the cross beam 6 through the hoisting rod 102, the connecting rod 103 and the fixing nut, so that the cross beam 6 is only subjected to the upward pulling force applied by the two counterweight weights 94 through the pulling rope 93, thereby allowing the operator to lift the cross beam 6 upward, so that the lower pressure head 7 and the supporting block 4 are separated from each other.

[0065] When the operator lifts the crossbeam 6 upward, the operator places the ultra-thin gasket cut into a fixed shape on the supporting block 4 at the same time, and then the operator slowly lowers the crossbeam 6 so that the lower pressure head 7 presses on the upper surface of the ultra-thin gasket. At this time, since the counterweight 94 applies an upward pulling force to the crossbeam 6 through the pulling rope 93, the gravity of the counterweight 94 and the gravity of the crossbeam 6 partially offset each other, so that the lower pressure head 7 does not cause deformation of the ultra-thin gasket when pressing on the upper surface of the ultra-thin gasket, and the influence of the gravity of the crossbeam 6 on the compression and rebound performance test of the gasket is avoided as much as possible, which helps to improve the test accuracy of the compression and rebound performance of the gasket, and further helps to improve the accuracy of the test results of the compression and rebound performance of the gasket.

[0066] After the ultra-thin gasket is placed and the crossbeam 6 is lowered, the operator starts the reverse drive motor 26, and the output shaft of the reverse drive motor 26 drives the rotating wheel 27 to rotate. Through the rotation of the rotating wheel 27, the abutting wheel 292 alternately abuts against the circumferential surface of the rotating wheel 27 and the surface at the position of the notch 28, thereby driving the rotating plate 291 to swing back and forth at a fixed frequency; during the reciprocating swing of the rotating plate 291, the toggle pawl 293 is driven by the rotating plate 291 to sequentially snap into different card interfaces 25 and push the connecting wheel 24, thereby helping to make the connecting wheel 24 and the bidirectional screw 17 intermittently rotate in the opposite direction. The positioning tooth 294 is driven by the rotating plate 291 to snap into the inside of the card interface 25, which helps to locate the rotation position of the connecting wheel 24 each time, thereby helping to improve the consistency of the rotation angle of the connecting wheel 24 each time.

[0067] When the bidirectional screw 17 rotates intermittently in the opposite direction, the two movable blocks 18 are synchronously moved horizontally in a direction away from the middle position of the bidirectional screw 17 under the joint action of the bidirectional screw 17 and the guide shaft 211, and the support plate 20 is driven to move gradually downward through the two support arms 19, thereby driving the counterweight box 101 placed on the support plate 20 to move gradually downward, and then the counterweight box 101 applies a downward pulling force to the crossbeam 6 through the lifting rod 102, the connecting rod 103 and the fixing nut, so that the crossbeam 6 drives the pressing head 7 to press down the ultra-thin gasket.

[0068] When the bidirectional screw 17 rotates intermittently in the reverse direction, the bidirectional screw 17 drives the transmission pawl 225 to rotate synchronously and intermittently in the reverse direction. During the reverse rotation of the transmission pawl 225, the electric magnet is energized, thereby adsorbing the transmission pawl 225, thereby preventing the transmission pawl 225 and the ratchet 224 on the driven gear 223 from getting stuck to each other; when the transmission pawl 225 completes one reverse rotation, the electric magnet is de-energized, releasing the adsorption of the transmission pawl 225, and under the action of the elastic force of the volute spring 226 itself, the transmission pawl 225 is clamped and pressed against one of the ratchet teeth 224, thereby preventing the transmission pawl 225 from getting stuck to each other. The driven gear 223 is used to prevent the transmission pawl 225 and the bidirectional screw 17 from continuing to rotate; such a reciprocating cycle helps prevent the gravity of the counterweight box 101 from acting on the bidirectional screw 17 through the support plate 20, the support arm 19 and the movable block 18, thereby causing the bidirectional screw 17 to continue to rotate in the opposite direction, and minimizes the counterweight box 101 from moving downward rapidly, driving the cross beam 6 and the downward pressure head 7 to move downward rapidly, thereby causing the downward pressure head 7 to exert excessive pressure on the body in an instant, thereby helping to prevent permanent deformation or damage to the gasket, and further helping to improve the test effect of the gasket's compression rebound performance.

[0069] After pressing down for a specified period of time, the operator starts the forward drive motor 221, thereby driving the counterweight box 101 placed on the support plate 20 to move upward again, so that the counterweight box 101 no longer applies downward pulling force to the beam 6 through the lifting rod 102, the connecting rod 103 and the fixing nut. At the same time, the compressed part of the ultra-thin gasket gradually rebounds, and drives the beam 6 to move upward synchronously during the rebound process. In the above process, the pressure sensor 3 helps to detect the downward pressure value of the gasket, and the displacement sensor 8 helps to detect the downward movement distance of the beam 6 during the gasket compression process - that is, the compression amount of the ultra-thin gasket. The displacement sensor 8 also helps to detect the upward movement distance of the beam 6 during the gasket rebound process - that is, the rebound amount of the ultra-thin gasket, thereby helping to accurately calculate the compression and rebound performance of the gasket.

[0070] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A product compression and rebound test device, characterized in that: It includes a frame (1), a test bench (2) is arranged on the frame (1), a pressure sensor (3) is arranged on the test bench (2), a supporting block (4) is arranged on the pressure sensor (3), columns (5) are arranged on both sides of the supporting block (4) on the test bench (2), a cross beam (6) is slidably arranged on the columns (5), a downward pressing head (7) is arranged on the bottom surface of the cross beam (6), a displacement sensor (8) is jointly arranged on the cross beam (6) and the test bench (2), an upward pulling assembly (9) for applying an upward pulling force to the cross beam (6) is arranged on the columns (5), a downward pulling assembly (10) for applying a downward pulling force to the cross beam (6) is arranged inside the frame (1), and a top support mechanism for top supporting the downward pulling assembly (10) is further arranged inside the frame (1).

2. The product compression and rebound test device according to claim 1, wherein: The upward pulling assembly (9) includes a mounting plate (91), a pulley (92), a pulling rope (93) and a counterweight (94). The mounting plate (91) is arranged at the top end of the column (5), the pulley (92) is arranged on the mounting plate (91), the pulling rope (93) is arranged on the pulley (92), one end of the pulling rope (93) is connected to the cross beam (6), and the counterweight (94) is arranged at the end of the pulling rope (93) away from the cross beam (6).

3. The product compression and resilience test device according to claim 1, characterized in that: The downward pulling assembly (10) includes a counterweight box (101), a hoisting rod (102), a connecting rod (103) and an anti-falling member (104). The counterweight box (101) is arranged inside the frame (1), a kidney-shaped hole (11) is arranged on the side wall of the counterweight box (101), the end of the hoisting rod (102) is inserted into the kidney-shaped hole (11), one end of the connecting rod (103) is connected to the hoisting rod (102), the end of the connecting rod (103) away from the hoisting rod (102) penetrates through the cross beam (6), and the anti-falling member (104) is arranged on the connecting rod (103) and above the cross beam (6).

4. The product compression and rebound test device according to claim 3, wherein: The top support mechanism includes a placement plate (13) arranged inside the frame (1), a top support cylinder (14) is arranged on the placement plate (13), the piston rod of the top support cylinder (14) extends towards the counterweight box (101), a top support plate (15) is arranged on the piston rod of the top support cylinder (14), and the counterweight box (101) is placed on the top support plate (15).

5. The product compression and resilience test device according to claim 3, characterized in that: The top support mechanism includes a mounting frame (16). A bidirectional screw (17) is rotatably arranged on the mounting frame (16). The bidirectional screw (17) is provided with two threaded sections with opposite thread rotation directions from the middle to both ends. Movable blocks (18) are threadedly connected to both threaded sections of the bidirectional screw (17). Support arms (19) are hingedly arranged on the movable blocks (18). One end of the support arm (19) away from the movable block (18) is hingedly provided with a support plate (20). A guiding component (21) for guiding the movement track of the support plate (20) is arranged inside the mounting frame (16). A forward rotation driving component (22) for driving the bidirectional screw (17) to rotate forward is arranged on one side wall of the mounting frame (16). A reverse rotation driving mechanism for driving the bidirectional screw (17) to rotate in the reverse direction is arranged on the other side wall of the mounting frame (16).

6. The product compression and rebound test device according to claim 5, characterized in that: The forward rotation driving component (22) includes a forward rotation driving motor (221), a driving gear (222), a driven gear (223), a ratchet tooth (224), a transmission pawl (225) and a volute spring (226). The forward rotation driving motor (221) is arranged on the mounting frame (16). The driving gear (222) is arranged on the output shaft of the forward rotation driving motor (221). The driven gear (223) is rotatably arranged on the mounting frame (16) and meshes with the driving gear (222). The driven gear (223) is located on the outer periphery of the bidirectional screw (17) and is coaxially arranged with the bidirectional screw (17). The ratchet tooth (224) is arranged on the inner wall of the circumferential direction of the driven gear (223). The transmission pawl (225) is rotatably arranged on the bidirectional screw (17). An installation through hole (23) is arranged on the transmission pawl (225). The volute spring (226) is arranged on the bidirectional screw (17). The volute spring (226) is located inside the installation through hole (23), and one end of the volute spring (226) is connected to the hole wall of the installation through hole (23). An electromagnet (32) for adsorbing the transmission pawl (225) is arranged on the bidirectional screw (17) on one side of the transmission pawl (225).

7. The product compression and rebound test device according to claim 6, characterized in that: The reverse rotation driving mechanism includes a connecting wheel (24) arranged at the end of the bidirectional screw (17). A plurality of spaced-apart clamping interfaces (25) are arranged on the circumference of the connecting wheel (24). A reverse rotation driving motor (26) is arranged on the mounting frame (16). A rotating wheel (27) is arranged on the output shaft of the reverse rotation driving motor (26). A notch (28) is arranged on the rotating wheel (27). A transmission component (29) for intermittently rotating the connecting wheel (24) driven by the rotating wheel (27) is arranged on the mounting frame (16).

8. The product compression and resilience test device according to claim 7, characterized in that: The transmission assembly (29) comprises a rotating plate (291), an abutting wheel (292), a toggle pawl (293) and a positioning tooth (294); the rotating plate (291) is rotatably arranged on a mounting frame (16); a coil spring (30) is arranged on the mounting frame (16); the coil spring (30) is coaxially arranged with a rotating shaft of the rotating plate (291) and connected to the rotating plate (291); the abutting wheel (292) is arranged at one end of the rotating plate (291) close to the rotating wheel (27); The abutment wheel (292) abuts against the circumferential side wall of the rotating wheel (27); the shifting pawl (293) is rotatably arranged at one end of the rotating plate (291) close to the connecting wheel (24); a second coil spring (31) is arranged on the rotating plate (291); the second coil spring (31) is coaxially arranged with the rotating shaft of the shifting pawl (293) and is connected to the rotating pawl; the positioning tooth (294) is arranged on the rotating plate (291) and is used to position the rotating position of the rotating wheel (27).

9. The product compression and resilience test device according to claim 5, wherein: The guide assembly (21) comprises a guide shaft (211), a shaft support (212), a connecting plate (213) and an auxiliary spring (214); the top end of the guide shaft (211) is arranged on the bottom surface of the support plate (20); the guide shaft (211) is slidably connected to the frame (1); the shaft support (212) is arranged in the frame (1) and is located on the circumferential periphery of the guide shaft (211); the connecting plate (213) is arranged at the bottom end of the guide shaft (211); the auxiliary spring (214) is arranged on the connecting plate (213); and one end of the auxiliary spring (214) away from the connecting plate (213) is connected to the frame (1).

10. A product compression and rebound test device according to claim 4, characterized in that: A plurality of limit baffles (12) for limiting the displacement of the counterweight box (101) in the horizontal direction are arranged in the frame (1), and the plurality of limit baffles (12) are located at the peripheries of the four corners of the counterweight box (101).

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