A product compression resilience test device

Abstract

The application relates to the technical field of product performance testing, in particular to a product compression resilience test device, which comprises a rack, a test table is arranged on the rack, a pressure sensor is arranged on the test table, a supporting block is arranged on the pressure sensor, vertical columns are arranged on the test table and located on the two sides of the supporting block, a cross beam is slidably arranged on the vertical columns, a pressing head is arranged on the bottom surface of the cross beam, a displacement sensor is arranged on the cross beam and the test table, an upward pulling assembly is arranged on the vertical column and used for applying an upward pulling force to the cross beam, a downward pulling assembly is arranged in the rack and used for applying a downward pulling force to the cross beam, and a jacking mechanism is further arranged in the rack and used for jacking the downward pulling assembly. The application helps to improve the test precision of the compression resilience performance of the gasket, thereby helping to improve the accuracy of the compression resilience performance test result of the gasket.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of product performance testing, and in particular to a product compression and rebound testing device. BACKGROUND

[0002] With the popularity of electric vehicles, the safety and stability of electric vehicle batteries have become the focus of electric vehicle technology research and development. The surface of the battery of the electric vehicle is usually provided with a gasket as a key sealing and buffering part, and the performance of the gasket directly affects the safety and service life of the battery.

[0003] At present, the performance requirements for the above-mentioned gasket in the electric vehicle industry are becoming higher and higher, especially the compression and rebound performance of the gasket to ensure the stability and safety of the battery under different environments. After the existing gasket is produced, the compression and rebound performance of the gasket is usually detected by using a testing device. The existing testing device usually includes a base, a material placing seat placed on the base, and a stand column located on both sides of the material placing seat. A cross beam is slidably installed on the two stand columns, 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 with 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 a predetermined pressure is applied to the gasket for compression and maintained for a certain period of time to simulate the actual working condition. Then, the pressure is removed, the gasket is fully rebounded, and then a measuring tool is used to measure the rebound amount and other parameters of the gasket. Finally, according to these parameters, the compression and rebound performance and other indicators of the gasket can be calculated.

[0004] However, when using the above-mentioned testing device to detect some ultra-thin gaskets, the gravity of the cross beam will affect the load applied to the gasket by the lower pressing device, thereby reducing the test precision of the testing device on the compression and rebound performance of the gasket, and thus easily leading to inaccurate test results of the compression and rebound performance of the gasket. SUMMARY

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

[0006] The present application provides a product compression and rebound testing device, which adopts the following technical scheme:

[0007] The utility model provides a product compression resilience test device, including frame, be provided with test table on the frame, be provided with pressure sensor on the test table, be provided with support block on the pressure sensor, be provided with stand on the test table both sides of support block, the slide of crossbeam is provided with on the stand, be provided with down head on the bottom surface of crossbeam, be provided with displacement sensor together on the crossbeam and test table, be provided with the upper pull assembly for the crossbeam to exert the tension of upward on the stand, be provided with the lower pull assembly for the crossbeam to exert the tension of downward in the frame, still be provided with the bracing mechanism for the lower pull assembly to prop in the frame.

[0008] By adopting the above technical scheme, the upward tension is applied to the crossbeam by the upper pull assembly, which helps to offset the gravity of the crossbeam, avoids the influence of the gravity of the crossbeam on the compression resilience test of the gasket, improves the test precision of the compression resilience of the gasket, and further improves the accuracy of the compression resilience test result of the gasket. The downward tension is applied to the crossbeam by the lower pull assembly, which helps to drive the down head to exert pressure on the gasket placed on the support block. The lower pull assembly is propped by the bracing mechanism, which helps to remove the downward tension applied to the crossbeam by the lower pull assembly, facilitates the operator to lift the crossbeam and the down head when placing the gasket, removes the pressure exerted by the down head on the gasket after the downward pressure is applied to the gasket, and helps the gasket to rebound after being pressed. The pressure sensor helps to detect the pressure on the gasket, and the displacement sensor helps to detect the movement distance of the crossbeam during the compression and rebound of the gasket, which indirectly detects the compression and rebound of the gasket, and further calculates the compression resilience of the gasket.

[0009] In a specific embodiment, the upper pull assembly includes a mounting plate, a pulley, a pulling rope, and a counterweight. The mounting plate is arranged at the top end of the stand. 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 crossbeam. The counterweight is arranged at the end of the pulling rope away from the crossbeam.

[0010] By adopting the above technical scheme, the upward tension is applied to the crossbeam by the upper pull assembly, which helps to offset the gravity of the crossbeam, avoids the influence of the gravity of the crossbeam on the compression resilience test of the gasket, improves the test precision of the compression resilience of the gasket, and further improves the accuracy of the compression resilience test result of the gasket. The downward tension is applied to the crossbeam by the lower pull assembly, which helps to drive the down head to exert pressure on the gasket placed on the support block. The lower pull assembly is propped by the bracing mechanism, which helps to remove the downward tension applied to the crossbeam by the lower pull assembly, facilitates the operator to lift the crossbeam and the down head when placing the gasket, removes the pressure exerted by the down head on the gasket after the downward pressure is applied to the gasket, and helps the gasket to rebound after being pressed. The pressure sensor helps to detect the pressure on the gasket, and the displacement sensor helps to detect the movement distance of the crossbeam during the compression and rebound of the gasket, which indirectly detects the compression and rebound of the gasket, and further calculates the compression resilience of the gasket.

[0011] In one specific implementation, the down-pulling assembly comprises a counterweight box, a hoisting rod, a connecting rod and a fall-preventing piece, the counterweight box is arranged inside the frame, a waist-shaped hole is arranged on the sidewall of the counterweight box, the end of the hoisting rod is inserted into the waist-shaped hole, one end of the connecting rod is connected with the hoisting rod, the end of the connecting rod away from the hoisting rod penetrates through the cross beam, and the fall-preventing piece is arranged on the connecting rod and above the cross beam.

[0012] By adopting the above technical scheme, the gravity of the counterweight box helps to exert a downward pulling force on the cross beam through the cooperation of the hoisting rod, the connecting rod and the fall-preventing piece, thereby helping to drive the pressing head to exert a pressure on the gasket placed on the supporting block, and further helping to compress the gasket under the pressure.

[0013] In one specific implementation, the top supporting mechanism comprises a placing plate arranged inside the frame, a top supporting cylinder is arranged on the placing plate, the piston rod of the top supporting cylinder extends towards the counterweight box, a top supporting plate is arranged on the piston rod of the top supporting cylinder, and the counterweight box is placed on the top supporting plate.

[0014] By adopting the above technical scheme, the top supporting cylinder helps to drive the top supporting plate to support the counterweight box, thereby helping to release the downward pulling force exerted by the counterweight box on the cross beam, further helping to facilitate the operator to lift the cross beam and the pressing head when placing the gasket, also helping to remove the pressure exerted by the pressing head on the gasket after the pressing of the gasket is completed, and helping to make the gasket rebound after the pressure is applied.

[0015] In one specific implementation, the top supporting mechanism comprises a mounting frame, a bidirectional screw rod is rotatably arranged on the mounting frame, two thread segments with opposite screw directions from the middle to the two ends are arranged on the bidirectional screw rod, a movable block is threadedly connected to each of the two thread segments of the bidirectional screw rod, a support arm is hingedly arranged on each of the movable blocks, a support plate is hingedly arranged on the end of each support arm away from the movable block, a guide assembly for guiding the movement track of the support plate is arranged in the mounting frame, a forward rotation driving assembly for driving the bidirectional screw rod to rotate forward is arranged on the sidewall of one end of the mounting frame, and a reverse rotation driving mechanism for driving the bidirectional screw rod to rotate reversely is arranged on the sidewall of the other end of the mounting frame.

[0016] By adopting the above technical scheme, the forward rotation driving assembly helps to drive the bidirectional screw to rotate forward, thereby helping to drive the two movable blocks to move horizontally towards the middle position of the bidirectional screw synchronously, and further helping to drive the counterweight box to move upwards in cooperation with the supporting arm and the supporting plate, helping to remove the downward pulling force exerted by the counterweight box on the cross beam, helping to facilitate the operator to lift the cross beam and the pressing head and place the gasket on the supporting block when placing the gasket, helping to remove the pressure exerted by the pressing head on the gasket after the gasket is pressed, and helping to make the gasket rebound after being pressed. The reverse rotation driving mechanism helps to drive the bidirectional screw to rotate reversely, thereby helping to drive the two movable blocks to move horizontally away from the middle position of the bidirectional screw synchronously, and further helping to drive the counterweight box to move downwards gradually in cooperation with the supporting arm and the supporting plate, helping to exert the downward pulling force on the cross beam in cooperation with the gravity of the counterweight box, thereby helping to drive the pressing head to exert pressure on the gasket gradually. The guide assembly helps to guide the movement track of the supporting plate, thereby helping to improve the stability of the supporting plate during movement, and further helping to improve the stability of the counterweight box during lifting.

[0017] In one specific implementation scheme, the forward rotation driving assembly includes a forward rotation driving motor, a driving gear, a driven gear, a ratchet, a transmission pawl and a scroll spring, the forward rotation driving motor is arranged on the mounting frame, the driving gear is arranged on the output shaft of the forward rotation driving motor, the driven gear is rotationally arranged on the mounting frame and is engaged with the driving gear, the driven gear is coaxially arranged on the circumferential periphery of the bidirectional screw, the ratchet is arranged on the circumferential inner wall of the driven gear, the transmission pawl is rotationally arranged on the bidirectional screw, the transmission pawl is provided with a mounting through hole, the scroll spring is arranged on the bidirectional screw, the scroll spring is located inside the mounting through hole, and one end of the scroll spring is connected with the hole wall of the mounting through hole, and the bidirectional screw is provided with an electromagnet on one side of the transmission pawl for adsorbing the transmission pawl.

[0018] By adopting the above technical scheme, the forward rotation driving motor helps to drive the driving gear to rotate, thereby helping to drive the driven gear to rotate; the scroll spring helps to make the transmission pawl and the ratchet tightly engaged, thereby helping to drive the bidirectional screw to rotate forward synchronously while the driven gear rotates, drive the two movable blocks to move horizontally towards the middle position of the bidirectional screw synchronously, and further help to drive the counterweight box to move upwards in cooperation with the supporting arm and the supporting plate, help to remove the downward pulling force exerted by the counterweight box on the cross beam, help to facilitate the operator to lift the cross beam and the pressing head and place the gasket on the supporting block when placing the gasket, help to remove the pressure exerted by the pressing head on the gasket after the gasket is pressed, and help to make the gasket rebound after being pressed.

[0019] In one specific implementation, the reverse driving mechanism includes a connecting wheel arranged at the end of the bidirectional screw, the connecting wheel is provided with a plurality of clamping interfaces arranged at intervals in the circumferential direction, a reverse driving motor is arranged on the mounting frame, the output shaft of the reverse driving motor is provided with a rotating wheel, the rotating wheel is provided with a notch, and a transmission assembly for intermittently rotating the connecting wheel under the driving of the rotating wheel is arranged on the mounting frame.

[0020] By adopting the above technical scheme, the reverse driving motor helps to drive the rotating wheel to rotate, and the transmission assembly helps to intermittently rotate the connecting wheel under the driving of the rotating wheel, thereby helping to intermittently reverse rotate the bidirectional screw, drive the two movable blocks to move horizontally away from the middle position of the bidirectional screw, and further helping to gradually move the counterweight box downward in cooperation with the supporting arm and the supporting plate, helping to gradually exert a downward pulling force on the cross beam in cooperation with the gravity of the counterweight box, and thereby helping to gradually exert a pressure on the gasket by the pressing head.

[0021] In one specific implementation, the transmission assembly includes a rotating plate, an abutting wheel, a pushing pawl, and a positioning tooth, the rotating plate is rotationally arranged on the mounting frame, a helical spring one is arranged on the mounting frame and coaxially arranged with the rotating shaft of the rotating plate and connected with the rotating plate, the abutting wheel is arranged at one end of the rotating plate close to the rotating wheel and abuts against the circumferential side wall of the rotating wheel, the pushing pawl is rotationally arranged at one end of the rotating plate close to the connecting wheel, a helical spring two is arranged on the rotating plate and coaxially arranged with the rotating shaft of the pushing pawl and connected with the pushing pawl, and the positioning tooth is arranged on the rotating plate and used for positioning the rotating position of the rotating wheel.

[0022] By adopting the above technical scheme, the helical spring one helps to abut the abutting wheel against the circumferential surface of the rotating wheel; the rotation of the rotating wheel helps to alternately abut the abutting wheel against the circumferential surface of the rotating wheel and the surface of the notch position, thereby helping to reciprocally rotate the rotating plate, further helping to push the connecting wheel in cooperation with the pushing pawl, and helping to intermittently reverse rotate the connecting wheel and the bidirectional screw, drive the two movable blocks to move horizontally away from the middle position of the bidirectional screw, and further helping to gradually move the counterweight box downward in cooperation with the supporting arm and the supporting plate, helping to gradually exert a downward pulling force on the cross beam in cooperation with the gravity of the counterweight box, and thereby helping to gradually exert a pressure on the gasket by the pressing head. The positioning tooth helps to position the rotating position of the connecting wheel each time, thereby helping to improve the consistency of the rotating angle of the connecting wheel each time.

[0023] In one specific implementation, the guiding assembly comprises a guiding shaft, a shaft support, a connecting plate and an auxiliary spring, the top end of the guiding shaft is arranged on the bottom surface of the support plate, the guiding shaft is in sliding connection with the rack, the shaft support is arranged in the rack and located at the circumferential periphery of the guiding shaft, the connecting plate is arranged at the bottom end of the guiding shaft, the auxiliary spring is arranged on the connecting plate, and the end of the auxiliary spring away from the connecting plate is connected with the rack.

[0024] By adopting the above technical scheme, the guiding shaft cooperates with the shaft support to guide the moving track of the support plate, thereby improving the stability of the support plate during movement, and further improving the stability of the counterweight box during lifting.

[0025] In one specific implementation, the rack is provided with a plurality of limiting baffle plates for limiting the displacement of the counterweight box in the horizontal direction, and the plurality of limiting baffle plates are located at the circumferential periphery of the counterweight box body.

[0026] By adopting the above technical scheme, the limiting baffle plates limit the displacement of the counterweight box in the horizontal direction, thereby preventing the counterweight box from shaking during lifting, and further improving the stability of the counterweight box during lifting.

[0027] In summary, the present application has at least one of the following beneficial technical effects:

[0028] 1. By arranging the up-pulling assembly, the down-pulling assembly and the top supporting mechanism, the up-pulling assembly applies upward pulling force to the cross beam, which counteracts the gravity of the cross beam, thereby avoiding the influence of the gravity of the cross beam on the compression and rebound performance test of the gasket, improving the test precision of the compression and rebound performance of the gasket, and further improving the accuracy of the test result of the compression and rebound performance of the gasket; the down-pulling assembly applies downward pulling force to the cross beam, thereby driving the lower pressing head to apply pressure to the gasket placed on the supporting block; the top supporting mechanism supports the down-pulling assembly, thereby removing the downward pulling force of the down-pulling assembly on the cross beam, facilitating the operator to lift the cross beam and the lower pressing head when placing the gasket, removing the pressure applied by the lower pressing head to the gasket after the downward pressing of the gasket is completed, and facilitating the rebound of the gasket after being pressed;

[0029] 2. The application drives the bidirectional screw in reverse rotation through the setting of the forward rotation driving assembly and the reverse rotation driving mechanism, which helps to drive the two movable blocks to move horizontally in the direction away from the middle position of the bidirectional screw synchronously, so as to help the counterweight box to move downwards gradually with the cooperation of the supporting arm and the supporting plate, and help the gravity of the counterweight box to exert downward pulling force on the cross beam gradually, which can avoid the rapid downward movement of the cross beam and the lower pressing head caused by the counterweight box, so as to prevent the lower pressing head from causing excessive pressure in an instant, thereby preventing the gasket from being permanently deformed or damaged, and improving the test effect of the compression and rebound performance of the gasket. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is the overall structure schematic diagram of embodiment 1 of the application.

[0031] Figure 2 is an enlarged view of A in Figure 1

[0032] Figure 3 is the overall structure schematic diagram of embodiment 2 of the application.

[0033] Figure 4 is the schematic diagram of the specific mechanism of the top supporting mechanism in embodiment 2 of the application.

[0034] Figure 5 is the schematic diagram of the specific mechanism of the forward rotation driving assembly in embodiment 2 of the application.

[0035] Figure 6 is an enlarged view of B in Figure 5

[0036] Figure 7 is the schematic diagram of the specific mechanism of the reverse rotation driving mechanism in embodiment 2 of the application.

[0037] ​​Explanation of reference signs: 1, rack; 2, test bench; 3, pressure sensor; 4, supporting block; 5, stand; 6, cross beam; 7, lower pressing head; 8, displacement sensor; 9, upper pulling assembly; 91, mounting plate; 92, pulley; 93, pulling rope; 94, counterweight weight; 10, lower pulling assembly; 101, counterweight box; 102, hoisting rod; 103, connecting rod; 104, anti-falling piece; 11, waist-shaped hole; 12, limiting baffle; 13, placing plate; 14, jacking cylinder; 15, jacking plate; 16, mounting frame; 17, bidirectional screw rod; 18, movable block; 19, supporting arm; 20, supporting plate; 21, guide assembly; 211, guide shaft; 212, shaft support; 213, connecting plate; 214, auxiliary spring; 22, forward driving assembly; 221, forward driving motor; 222, driving gear; 223, driven gear; 224, ratchet; 225, transmission pawl; 226, volute spring; 23, mounting through hole; 24, connecting wheel; 25, clamping interface; 26, reverse driving motor; 27, rotating wheel; 28, notch; 29, transmission assembly; 291, rotating plate; 292, abutting wheel; 293, actuating ratchet; 294, positioning tooth; 30, spiral spring one; 31, spiral spring two; 32, electromagnet. DETAILED DESCRIPTION

[0038] The application will be further described in detail below with reference to the accompanying drawings.

[0039] Embodiment 1

[0040] The embodiment of the application discloses a product compression resilience test device, which refers to Figure 1 and Figure 2 comprises a rack 1, a test bench 2 is fixedly installed on the top surface of the rack 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 stands 5 are symmetrically installed on the test bench 2 and located on the two sides of the supporting block 4, a cross beam 6 is commonly and slidably sleeved on the two stands 5, and a lower pressing head 7 is fixedly installed on the bottom surface of the cross beam 6 and located directly above the supporting block 4. A displacement sensor 8 is commonly installed on the top surface of the test bench 2 and the bottom surface of the cross beam 6.

[0041] Referring to Figure 1 , the two stands 5 are commonly provided with an upper pulling assembly 9, the upper pulling assembly 9 comprises a mounting plate 91, pulleys 92, pulling ropes 93 and counterweight weights 94, in the embodiment, the pulleys 92, the pulling ropes 93 and the counterweight weights 94 are all provided with two groups, the mounting plate 91 is horizontally and fixedly installed at the top end of the two stands 5, the two groups of pulleys 92 are all rotationally 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 with the top surface of the cross beam 6, and the counterweight weight 94 is installed at the end of the pulling rope 93 away from the cross beam 6.

[0042] With reference to Figure 1 , the inside of the rack 1 is provided with a jacking mechanism, which comprises a placing plate 13 fixedly installed in the rack 1, a jacking cylinder 14 fixedly installed on the bottom surface of the placing plate 13, a piston rod of the jacking cylinder 14 upwardly penetrating the placing plate 13, and a jacking plate 15 horizontally placed and fixedly installed at the top end of the piston rod of the jacking cylinder 14.

[0043] With reference to Figure 1 , the inside of the rack 1 is further provided with a downward pulling assembly 10, which comprises a counterweight box 101, hoisting rods 102, connecting rods 103 and anti-falling pieces 104. In the embodiment, the anti-falling pieces 104 are fixed nuts. The hoisting rods 102, the connecting rods 103 and the fixed nuts are all provided with two groups. The counterweight box 101 is placed on the jacking plate 15, and a counterweight block is placed in the counterweight box 101. Two groups of waist-shaped holes 11 are penetratingly formed on the opposite side walls of the counterweight box 101, and the length direction of each waist-shaped hole 11 is arranged along the vertical direction. The two side ends of each hoisting rod 102 are insertedly installed in one waist-shaped hole 11. The connecting rods 103 are vertically arranged, and the bottom end of each connecting rod 103 is fixedly connected with the middle position of the hoisting rod 102. The top end of each connecting rod 103 penetrates the top wall of the rack 1, the test bench 2 and the cross beam 6 in sequence, and the fixed nut is fixedly connected with the connecting rod 103 and located above the cross beam 6.

[0044] With reference to Figure 1 , the inside of the rack 1 is provided with limiting baffle plates 12 fixedly installed at the four corners of the body of the counterweight box 101.

[0045] With reference to Figure 1 and Figure 2 , when the compression and rebound performance of the ultra-thin gasket is tested, the operator starts the jacking cylinder 14, the piston rod of the jacking cylinder 14 extends upwardly, jacks up the placing plate 13, drives the counterweight box 101 placed on the placing plate 13 to move upwardly, and then makes the counterweight box 101 no longer exert a downward pulling force on the cross beam 6 through the hoisting rods 102, the connecting rods 103 and the fixed nuts, so that the cross beam 6 only receives an upward pulling force exerted by the two counterweight blocks 94 through the pulling ropes 93, thereby allowing the operator to lift the cross beam 6 upwardly, and making the lower pressing head 7 and the supporting block 4 separate from each other.

[0046] With reference to Figure 1 and Figure 2When the operator lifts the cross beam 6 upward, the operator simultaneously places the fixed-shape ultra-thin gasket on the supporting block 4, and then the operator slowly lowers the cross beam 6, so that the lower pressing head 7 is pressed on the upper surface of the ultra-thin gasket. At this time, because the counterweight 94 exerts an upward pulling force on the cross beam 6 through the pulling rope 93, the gravity of the counterweight 94 and the gravity of the cross beam 6 are partially offset, so that the lower pressing head 7 is pressed on the upper surface of the ultra-thin gasket without causing deformation of the ultra-thin gasket, and the influence of the gravity of the cross beam 6 on the compression and rebound performance test of the gasket is avoided as much as possible, thereby helping to improve the test precision of the compression and rebound performance of the gasket, and further helping to improve the accuracy of the test result of the compression and rebound performance of the gasket.

[0047] With reference to Figure 1 and Figure 2 , the operator closes the jacking air cylinder 14, the piston rod of the jacking air cylinder 14 is withdrawn downward, the placing plate 13 is synchronously moved downward, the counterweight box 101 placed on the placing plate 13 is moved downward, and the counterweight box 101 exerts a downward pulling force on the cross beam 6 through the lifting rod 102, the connecting rod 103 and the fixing nut, so that the cross beam 6 drives the lower pressing head 7 to press the ultra-thin gasket downward.

[0048] With reference to Figure 1 and Figure 2 , when the ultra-thin gasket is pressed for a specified time, the operator starts the jacking air cylinder 14, the piston rod of the jacking air cylinder 14 is extended upward, the placing plate 13 is jacked upward, the counterweight box 101 placed on the placing plate 13 is moved upward, and the counterweight box 101 no longer exerts a downward pulling force on the cross beam 6 through the lifting rod 102, the connecting rod 103 and the fixing nut, while the compressed part of the ultra-thin gasket gradually rebounds and drives the cross beam 6 to move upward synchronously. In the foregoing process, the pressure sensor 3 helps to detect the value of the downward pressing force on the gasket, and the displacement sensor 8 helps to detect the downward moving distance of the cross beam 6 (i.e. the compression amount of the ultra-thin gasket) during the pressing process of the gasket and the upward moving distance of the cross beam 6 (i.e. the rebound amount of the ultra-thin gasket) during the rebound process of the gasket, thereby helping to accurately calculate the compression and rebound performance of the gasket.

[0049] In addition, when the compression and rebound performance of ultra-thin gaskets with different thicknesses is tested, the operator adjusts the weight of the counterweight blocks placed in the counterweight box 101 and the weight of the counterweight 94, which helps to make the adjusted test device applicable to ultra-thin gaskets with different thicknesses, thereby helping to improve the applicability of the test device.

[0050] With reference to Figure 1In the process of lifting the counterweight box 101 by the placing plate 13, the plurality of limiting baffle plates 12 help to limit the displacement of the counterweight box 101 in the horizontal direction, thereby helping to prevent the counterweight box 101 from shaking during lifting, and further helping to improve the stability of the counterweight box 101 during lifting.

[0051] The implementation principle of the embodiment of the application is that when the compression and rebound performance of the ultra-thin gasket is tested, the operator starts the jacking cylinder 14, the piston rod of the jacking cylinder 14 extends upward to jack up the placing plate 13, thereby driving the counterweight box 101 placed on the placing plate 13 to move upward, and further making the counterweight box 101 no longer exert a downward pulling force on 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 exerted by the two counterweight boxes 94 through the pulling ropes 93, thereby allowing the operator to lift the cross beam 6 upward, so that the lower pressing head 7 and the supporting block 4 are separated from each other.

[0052] 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 slowly lowers the cross beam 6, so that the lower pressing head 7 is pressed on the upper surface of the ultra-thin gasket. At this time, since the counterweight boxes 94 exert an upward pulling force on the cross beam 6 through the pulling ropes 93, the gravity of the counterweight boxes 94 and the gravity of the cross beam 6 are partially offset, so that the lower pressing head 7 pressed on the upper surface of the ultra-thin gasket will not cause deformation of the ultra-thin gasket, and the influence of the gravity of the cross beam 6 on the compression and rebound performance test of the gasket is avoided as much as possible, thereby helping to improve the test precision of the compression and rebound performance of the gasket, and further helping to improve the accuracy of the test result of the compression and rebound performance of the gasket.

[0053] The operator closes the jacking cylinder 14, the piston rod of the jacking cylinder 14 is withdrawn downward, driving the placing plate 13 to move downward synchronously, thereby driving the counterweight box 101 placed on the placing plate 13 to move downward, and further making the counterweight box 101 exert a downward pulling force on the cross beam 6 through the lifting rod 102, the connecting rod 103 and the fixing nut, so that the cross beam 6 drives the lower pressing head 7 to press the ultra-thin gasket downward.

[0054] When the specified duration of pressing down is reached, the operator starts the jacking cylinder 14, the piston rod of the jacking cylinder 14 extends upward to jack up the placing plate 13, thereby driving the counterweight box 101 placed on the placing plate 13 to move upward, so that the counterweight box 101 no longer exerts downward pulling force on the cross beam 6 through the hoisting rod 102, the connecting rod 103 and the fixing nut, and the compressed part of the ultra-thin gasket gradually rebounds, and in the process of rebounding, the cross beam 6 is synchronously moved upward. In the foregoing process, the pressure sensor 3 helps to detect the value of the downward pressure on the gasket, the displacement sensor 8 helps to detect the downward movement distance of the cross beam 6 during the compression of the gasket, i.e. the compression amount of the ultra-thin gasket, and the displacement sensor 8 also helps to detect the upward movement distance of the cross beam 6 during the rebounding of the gasket, i.e. the rebounding amount of the ultra-thin gasket, thereby helping to accurately calculate the compression and rebounding performance of the gasket.

[0055] Embodiment 2:

[0056] With reference to Figure 3 and Figure 4 , the difference between the embodiment of the application and embodiment 1 is that the jacking mechanism comprises a U-shaped mounting bracket 16 fixedly installed in the rack 1, a bidirectional screw rod 17 is horizontally rotatably installed in the mounting bracket 16, the bidirectional screw rod 17 has two thread segments with opposite screw directions from the middle position to both ends, and each of the two thread segments of the bidirectional screw rod 17 is threadedly connected with a movable block 18. Each movable block 18 is hingedly connected with a support arm 19, and the top ends of the two support arms 19 are hingedly connected with a horizontally arranged support plate 20, and the counterweight box 101 is placed on the support plate 20.

[0057] With reference to Figure 3 and Figure 4 , a plurality of guide assemblies 21 are arranged in the rack 1, each 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 slidingly connected with the rack 1, the shaft support 212 is arranged in the rack 1 and located at the circumferential periphery of the guide shaft 211, the connecting plate 213 is fixedly installed at the bottom end of the guide shaft 211, and the auxiliary spring 214 is fixedly installed on the connecting plate 213. The auxiliary spring 214 is sleeved on the circumferential periphery of the guide shaft 211, and the end of the auxiliary spring 214 away from the connecting plate 213 is fixedly connected with the rack 1.

[0058] With reference to Figure 4 and Figure 5, the end side wall of the mounting frame 16 is provided with a forward rotation driving assembly 22, the forward rotation driving assembly 22 comprises a forward rotation driving motor 221, a driving gear 222, a driven gear 223, a transmission ratchet pawl 225, a scroll spring 226 and a plurality of ratchet teeth 224, in the embodiment, the transmission ratchet pawl 225 is made of magnetic material. The forward rotation driving motor 221 is installed on the inner side wall of the mounting frame 16, the driving gear 222 is fixedly installed on the output shaft of the forward rotation driving motor 221 and located outside the mounting frame 16, and the driven gear 223 is rotatably installed on the outer side wall of the mounting frame 16 and engaged with the driving gear 222.

[0059] Referring to Figure 5 and Figure 6 , a through hole is coaxially formed in the driven gear 223, one side end of the bidirectional screw rod 17 is inserted into the through hole and the bidirectional screw rod 17 is coaxially arranged with the driven gear 223, the plurality of ratchet teeth 224 are sequentially and adjacently arranged on the circumferential hole wall of the through hole, the transmission ratchet pawl 225 is rotatably installed on the bidirectional screw rod 17 and located inside the through hole, the transmission ratchet pawl 225 is provided with an installation through hole 23, the scroll spring 226 is fixedly installed on the bidirectional screw rod 17, the scroll spring 226 is located inside the installation through hole 23, one end of the scroll spring 226 is fixedly connected with the hole wall of the installation through hole 23, and the electromagnet 32 is fixedly installed on one side of the bidirectional screw rod 17, which is located on the side of the transmission ratchet pawl 225.

[0060] Referring to Figure 3 , Figure 4 and Figure 6 , when the compression and rebound performance of the ultra-thin gasket is tested, the operator starts the forward rotation driving motor 221, the output shaft of the forward rotation driving motor 221 drives the driving gear 222 to rotate, thereby driving the driven gear 223 to synchronously rotate under the meshing effect. While the driven gear 223 rotates, the transmission ratchet pawl 225 is clamped and abuts against the ratchet teeth 224 under the elastic force of the scroll spring 226, thereby causing the driven gear 223 to drive the transmission ratchet pawl 225 to synchronously rotate while rotating, and further causing the bidirectional screw rod 17 to synchronously rotate forward under the driving of the transmission ratchet pawl 225. When the bidirectional screw rod 17 rotates forward, the two movable blocks 18 synchronously move horizontally towards the middle position of the bidirectional screw rod 17 under the joint action of the bidirectional screw rod 17 and the guide shaft 211, drive the two supporting arms 19 to lift the supporting plate 20, thereby driving the counterweight box 101 placed on the supporting plate 20 to move upwards, and further causing the counterweight box 101 to no longer exert a downward pulling force on the cross beam 6 through the hoisting rod 102, the connecting rod 103 and the fixing nut, causing the cross beam 6 to only receive an upward pulling force exerted by the two counterweight blocks 94 through the pulling ropes 93, thereby allowing the operator to lift the cross beam 6 upwards, causing the lower pressing head 7 and the supporting block 4 to separate from each other.

[0061] Referring to Figure 3When the operator lifts the cross beam 6 upward, the operator simultaneously places the fixed-shaped ultra-thin gasket on the supporting block 4, and then the operator slowly lowers the cross beam 6, so that the lower pressing head 7 is pressed on the upper surface of the ultra-thin gasket. At this time, because the counterweight 94 exerts an upward pulling force on the cross beam 6 through the pulling rope 93, the gravity of the counterweight 94 and the gravity of the cross beam 6 are partially offset, so that the lower pressing head 7 is pressed on the upper surface of the ultra-thin gasket without causing deformation of the ultra-thin gasket, and the influence of the gravity of the cross beam 6 on the compression and rebound performance test of the gasket is avoided as much as possible, thereby helping to improve the test precision of the compression and rebound performance of the gasket, and further helping to improve the accuracy of the test result of the compression and rebound performance of the gasket.

[0062] With reference to Figure 3 and Figure 4 When the support plate 20 moves in the vertical direction, the guide shaft 211 cooperates with the shaft support 212 to guide the movement track of the support plate 20, thereby helping to improve the stability of the support plate 20 during movement, and further helping to improve the stability of the counterweight box 101 during lifting. When the bidirectional screw 17 rotates, the guide shaft 211 limits the rotation of the support plate 20, thereby helping to limit the rotation of the movable block 18 through the support arm 19, and further enabling the movable block 18 to move horizontally along the axial direction of the bidirectional screw 17.

[0063] With reference to Figure 4 and Figure 7 The other end side wall of the mounting frame 16 is provided with a reverse driving mechanism, the reverse driving mechanism includes a connecting wheel 24 fixedly installed at the end of the bidirectional screw 17, a plurality of clamping interfaces 25 are arranged at equal intervals on the circumferential side wall of the connecting wheel 24, a reverse driving motor 26 is fixedly installed on the inner side wall of the mounting frame 16, the output shaft of the reverse driving motor 26 penetrates and extends out of the side wall of the mounting frame 16, a rotating wheel 27 is fixedly installed on the end of the output shaft of the reverse driving motor 26 extending out of the mounting frame 16, and the rotating wheel 27 has a notch 28.

[0064] With reference to Figure 7The outer side wall of the mounting frame 16 is provided with a transmission assembly 29, which comprises a rotating plate 291, an abutting wheel 292, a pushing pawl 293 and a positioning tooth 294. The rotating plate 291 is rotationally installed on the mounting frame 16. A helical spring I 30 is fixedly installed on the outer side wall of the mounting frame 16. The helical spring I 30 is coaxially arranged with the rotating shaft of the rotating plate 291, and one end of the helical spring I 30 is fixedly connected with the rotating plate 291. The abutting wheel 292 is rotationally installed on one end of the rotating plate 291 close to the rotating wheel 27, and the abutting wheel 292 abuts against the circumferential side wall of the rotating wheel 27. The pushing pawl 293 is rotationally installed on one end of the rotating plate 291 close to the connecting wheel 24. A helical spring II 31 is fixedly installed on the rotating plate 291. The helical spring II 31 is coaxially arranged with the rotating shaft of the pushing pawl 293, and one end of the helical spring II 31 is fixedly connected with the pushing pawl. The positioning tooth 294 is integrally formed on one side of the rotating plate 291 facing the connecting wheel 24.

[0065] With reference to Figure 3 , Figure 4 and Figure 7 When the ultra-thin gasket is placed and the cross beam 6 is lowered, the operator starts the reverse driving motor 26. The output shaft of the reverse driving motor 26 drives the rotating wheel 27 to rotate. The abutting wheel 292 alternately abuts against the circumferential surface of the rotating wheel 27 and the surface of the notch 28 position through the rotation of the rotating wheel 27, so as to drive the rotating plate 291 to reciprocate at a fixed frequency. In the reciprocating process of the rotating plate 291, the pushing pawl 293 is sequentially clamped into different clamping interfaces 25 and pushes the connecting wheel 24 under the driving of the rotating plate 291, so as to help the intermittent reverse rotation of the connecting wheel 24 and the bidirectional screw rod 17. The positioning tooth 294 is clamped into the clamping interface 25 under the driving of the rotating plate 291, which helps to position the rotating position of the connecting wheel 24 each time, so as to help to improve the consistency of the rotating angle of the connecting wheel 24 each time.

[0066] With reference to Figure 3 and Figure 4 When the bidirectional screw rod 17 is intermittently and reversely rotated, the two movable blocks 18 are synchronously horizontally moved away from the middle position of the bidirectional screw rod 17 under the joint action of the bidirectional screw rod 17 and the guide shaft 211. The supporting plate 20 is gradually moved downward through the two supporting arms 19, so as to gradually move the counterweight box 101 placed on the supporting plate 20 downward, and then the counterweight box 101 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 drives the downward pressing head 7 to press the ultra-thin gasket.

[0067] With reference to Figure 3 , Figure 6 and Figure 7, when the bidirectional screw 17 is intermittently and reversely rotated, the bidirectional screw 17 drives the transmission pawl 225 to be synchronously and intermittently reversely rotated, in the process of the reverse rotation of the transmission pawl 225, the electromagnet is powered on, so as to adsorb the transmission pawl 225, and then prevent the transmission pawl 225 and the ratchet teeth 224 on the driven gear 223 from being mutually locked; when the transmission pawl 225 completes a reverse rotation, the electromagnet is powered off, the adsorption of the transmission pawl 225 is released, the transmission pawl 225 is clamped and abutted with a ratchet tooth 224 under the action of the elastic force of the scroll spring 226, so as to block the transmission pawl 225 and the bidirectional screw 17 from continuing to rotate by the driven gear 223; the reciprocating circulation is helpful to 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 to cause the bidirectional screw 17 to be continuously reversely rotated, and to avoid that the rapid downward movement of the counterweight box 101 drives the cross beam 6 and the downward head 7 to be rapidly downwardly moved to cause the downward head 7 to cause an excessive pressure in an instant, so as to prevent the gasket from being permanently deformed or damaged, and then to improve the test effect of the compression and rebound performance of the gasket.

[0068] With reference to Figure 3 And Figure 4 When the downward pressing specified duration is reached, the operator starts the forward rotation driving motor 221, so as to drive the counterweight box 101 placed on the support plate 20 to move upward again, and then 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, and the compressed part of the ultra-thin gasket gradually rebounds, and drives the cross beam 6 to move upward synchronously in the process of rebounding. In the foregoing process, the pressure sensor 3 is helpful to detect the downward pressure value of the gasket, the displacement sensor 8 is helpful to detect the downward movement distance of the cross beam 6 (i.e. the compression amount of the ultra-thin gasket) in the process of the compression of the gasket and the upward movement distance of the cross beam 6 (i.e. the rebound amount of the ultra-thin gasket) in the process of the rebound of the gasket, so as to accurately calculate the compression and rebound performance of the gasket.

[0069] The implementation principle of the embodiment of the application is that the ratchet 224 is clamped and abuts under the action, so that the driven gear 223 is driven to rotate synchronously with the transmission pawl 225, and then the bidirectional screw rod 17 is driven to rotate forward synchronously under the driving of the transmission pawl 225. When the bidirectional screw rod 17 rotates forward, the two movable blocks 18 are driven to move horizontally towards the middle position of the bidirectional screw rod 17 under the joint action of the bidirectional screw rod 17 and the guide shaft 211, the two support arms 19 are driven to lift the support plate 20, so that the counterweight box 101 placed on the support plate 20 is driven to move upwards, and then 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 blocks 94 through the pulling ropes 93, thereby allowing the operator to lift the cross beam 6 upwards, so that the lower pressing head 7 and the supporting block 4 are separated from each other.

[0070] When the operator lifts the cross beam 6 upwards, the operator simultaneously places the fixed-shaped ultra-thin gasket on the supporting block 4, and then the operator slowly lowers the cross beam 6, so that the lower pressing head 7 is pressed on the upper surface of the ultra-thin gasket. At this time, since the counterweight blocks 94 apply an upward pulling force to the cross beam 6 through the pulling ropes 93, the gravity of the counterweight blocks 94 and the gravity of the cross beam 6 are partially offset, so that the lower pressing head 7 is pressed on the upper surface of the ultra-thin gasket without causing deformation of the ultra-thin gasket, and the influence of the gravity of the cross beam 6 on the compression and rebound performance test of the gasket is avoided as much as possible, thereby helping to improve the test precision of the compression and rebound performance of the gasket, and further helping to improve the accuracy of the test result of the compression and rebound performance of the gasket.

[0071] When the ultra-thin gasket is placed and the cross beam 6 is lowered, the operator starts the reverse driving motor 26, the output shaft of the reverse driving motor 26 drives the rotating wheel 27 to rotate, the rotating wheel 27 rotates to make the abutting wheel 292 abut with the circumferential surface of the rotating wheel 27 and the surface of the gap 28 alternately, thereby driving the rotating plate 291 to reciprocate at a fixed frequency; in the process of reciprocating of the rotating plate 291, the push pawl 293 is driven into different clamping interfaces 25 and pushes the connecting wheel 24 under the driving of the rotating plate 291, thereby helping to make the connecting wheel 24 and the bidirectional screw rod 17 rotate reversely intermittently. The positioning tooth 294 is clamped into the clamping interface 25 under the driving of the rotating plate 291, which helps to position the rotating position of the connecting wheel 24 each time, thereby helping to improve the consistency of the rotating angle of the connecting wheel 24 each time.

[0072] When the bidirectional screw 17 is intermittently and reversely rotated, the two movable blocks 18 are synchronously horizontally moved away from the middle position of the bidirectional screw 17 under the joint action of the bidirectional screw 17 and the guide shaft 211, the support plate 20 is gradually moved downward by the two support arms 19, and the counterweight box 101 placed on the support plate 20 is gradually moved downward, so that the counterweight box 101 exerts a downward pulling force on the cross beam 6 through the lifting rod 102, the connecting rod 103 and the fixing nut, and the cross beam 6 drives the downward head 7 to press the ultra-thin gasket downward.

[0073] When the bidirectional screw 17 is intermittently and reversely rotated, the bidirectional screw 17 drives the transmission pawl 225 to be synchronously and intermittently reversely rotated, and in the process of the reverse rotation of the transmission pawl 225, the electromagnet is electrified to adsorb the transmission pawl 225, thereby preventing the transmission pawl 225 and the ratchet teeth 224 on the driven gear 223 from being mutually locked. When the transmission pawl 225 completes a reverse rotation, the electromagnet is de-energized to release the adsorption of the transmission pawl 225, and under the action of the elastic force of the scroll spring 226, the transmission pawl 225 is clamped and tightly engaged with a ratchet tooth 224, so that the driven gear 223 blocks the continuous rotation of the transmission pawl 225 and the bidirectional screw 17. Such a reciprocating cycle helps to 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 to cause the bidirectional screw 17 to continuously and reversely rotate, and to avoid the rapid downward movement of the counterweight box 101 driving the cross beam 6 and the downward head 7 to rapidly move downward, thereby preventing the downward head 7 from exerting excessive pressure on the gasket in an instant, and helping to prevent the gasket from being permanently deformed or damaged, thereby helping to improve the test effect on the compression and rebound performance of the gasket.

[0074] When the downward pressing specified time period elapses, the operator starts the forward rotation driving motor 221 to drive the counterweight box 101 placed on the support plate 20 to move upward again, so that the counterweight box 101 no longer exerts a downward pulling force on the cross beam 6 through the lifting rod 102, the connecting rod 103 and the fixing nut, and the compressed part of the ultra-thin gasket gradually rebounds and drives the cross beam 6 to synchronously move upward in the process of rebounding. In the foregoing process, the pressure sensor 3 helps to detect the downward pressure value of the gasket, the displacement sensor 8 helps to detect the downward movement distance of the cross beam 6 in the process of the gasket being pressed, i.e. the compression amount of the ultra-thin gasket, and the displacement sensor 8 also helps to detect the upward movement distance of the cross beam 6 in the process of the gasket rebounding, i.e. the rebounding amount of the ultra-thin gasket, thereby helping to accurately calculate the compression and rebound performance of the gasket.

[0075] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, and therefore: any equivalent changes made on the structure, shape and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A product compression rebound testing device, characterized in that: The system includes a frame, a test bench mounted on the frame, a pressure sensor mounted on the test bench, a support block mounted on the pressure sensor, columns on both sides of the support block on the test bench, a crossbeam slidably mounted on the columns, a downward pressure head mounted on the bottom surface of the crossbeam, a displacement sensor mounted on both the crossbeam and the test bench, an upward pull assembly on the columns for applying upward tension to the crossbeam, a downward pull assembly inside the frame for applying downward tension to the crossbeam, and a further component inside the frame for... A supporting mechanism for supporting the pull-down assembly; the pull-up assembly includes a mounting plate, pulleys, a traction rope, and a counterweight. The mounting plate is located at the top of the column, the pulley is mounted on the mounting plate, the traction rope is mounted on the pulley, one end of the traction rope is connected to the crossbeam, and the counterweight is located at the end of the traction rope away from the crossbeam; the pull-down assembly includes a counterweight box, a lifting rod, a connecting rod, and a fall arrestor. The counterweight box is located inside the frame, and a slotted hole is provided on the side wall of the counterweight box, through which the end of the lifting rod is inserted. One end of the connecting rod is connected to the hoisting rod, and the end of the connecting rod away from the hoisting rod passes through the crossbeam. The anti-fall device is set on the connecting rod and located above the crossbeam. The top support mechanism includes a placement plate set in the frame, a top support cylinder set on the placement plate, the piston rod of the top support cylinder extending toward the counterweight box, a top support plate set on the piston rod of the top support cylinder, and the counterweight box placed on the top support plate. The top support mechanism includes a mounting frame, on which a bidirectional screw is rotatably set. The bidirectional screw is set with two threaded segments with opposite threads from the middle to both ends. Each of the two threaded segments of the bidirectional screw is threadedly connected to a movable block. Each movable block is hinged with a support arm. The end of the support arm away from the movable block is hinged with a support plate. The mounting frame is equipped with a guide component for guiding the movement trajectory of the support plate. One side wall of the mounting frame is equipped with a forward drive component for driving the bidirectional screw to rotate forward, and the other side wall of the mounting frame is equipped with a reverse drive mechanism for driving the bidirectional screw to rotate in the opposite direction.

2. The product compression rebound testing device according to claim 1, characterized in that: The forward drive assembly includes a forward drive motor, a drive gear, a driven gear, a ratchet, a transmission pawl, and a spiral spring. The forward drive motor is mounted on a mounting bracket. The drive gear is mounted on the output shaft of the forward drive motor. The driven gear is rotatably mounted on the mounting bracket and meshes with the drive gear. The driven gear is located on the circumferential periphery of the bidirectional screw and is coaxially arranged with the bidirectional screw. The ratchet is located on the circumferential inner wall of the driven gear. The transmission pawl is rotatably mounted on the bidirectional screw and has a mounting through hole. The spiral spring is mounted on the bidirectional screw and is located inside the mounting through hole, with one end of the spiral spring connected to the hole wall. An electromagnet for attracting the transmission pawl is provided on one side of the bidirectional screw.

3. The product compression rebound testing device according to claim 2, characterized in that: The reversing drive mechanism includes a connecting wheel located at the end of a bidirectional screw. The connecting wheel has several spaced-apart snap-fit ​​interfaces on its circumference. A reversing drive motor is mounted on the mounting frame. A rotating wheel is mounted on the output shaft of the reversing drive motor. The rotating wheel has a notch. A transmission component is mounted on the mounting frame to make the connecting wheel rotate intermittently under the drive of the rotating wheel.

4. The product compression rebound testing device according to claim 3, characterized in that: The transmission assembly includes a rotating plate, an abutment wheel, an actuating pawl, and a positioning tooth. The rotating plate is rotatably mounted on a mounting frame, and a first helical spring is mounted on the mounting frame. The first helical spring is coaxially mounted with and connected to the rotating plate's shaft. The abutment wheel is located at one end of the rotating plate near the rotating wheel and abuts against the circumferential side wall of the rotating wheel. The actuating pawl is rotatably mounted at one end of the rotating plate near the connecting wheel. A second helical spring is mounted on the rotating plate, coaxially mounted with and connected to the rotating pawl's shaft. The positioning tooth is mounted on the rotating plate and is used to position the rotating wheel's rotation.

5. The product compression rebound testing device according to claim 1, characterized in that: The guide assembly includes a guide shaft, a shaft support, a connecting plate, and an auxiliary spring. The top end of the guide shaft is disposed on the bottom surface of the support plate. The guide shaft is slidably connected to the frame. The shaft support is disposed inside the frame and located on the circumferential periphery of the guide shaft. The connecting plate is disposed at the bottom end of the guide shaft. The auxiliary spring is disposed on the connecting plate, and the end of the auxiliary spring away from the connecting plate is connected to the frame.

6. The product compression rebound testing device according to claim 1, characterized in that: The frame is equipped with several limiting baffles to restrict the horizontal displacement of the counterweight box. These limiting baffles are located at the four corners of the counterweight box.

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