A foam impact resistance testing device and testing method

Abstract

The invention discloses a foam anti-impact force testing device, which belongs to the technical field of impact testing, and comprises a placing device for placing foam, wherein the placing device is provided with an adjusting device for adjusting the test height, and the adjusting device is provided with a releasing device for performing an impact test on the foam; the placing device provided by the invention can fix and clamp the foam placed thereon, so that the position of the foam itself will not change when the impact test is performed, thereby ensuring the smooth progress of the impact force test, and at the same time, when the pressing disc is pressed down, the winding wheel starts to wind again, thereby realizing automatic continuous testing; after the releasing device provided by the invention lifts the impact ball to the highest point, the impact ball is automatically released to perform an impact force test on the foam, and when the foam impact force test is completed, the impact ball is automatically wound up under the action of the pressing disc, thereby realizing full-automatic performance of the impact test, with a high degree of automation and good continuity.

Description

Technical Field

[0001] The present invention relates to the technical field of impact testing, and in particular to a foam impact resistance testing device and a testing method. Background Art

[0002] Foam is a material with a foam structure, usually composed of porous bubbles or voids, and has the characteristics of lightness, softness, and elasticity. Foam has a wide range of main uses. Foam impact force test is usually used to evaluate the tolerance and energy absorption performance of foam materials when subjected to external impact. This test is widely used in the packaging industry, electronic product protection, automobiles, aerospace and other fields to ensure that the foam can effectively absorb impact force and reduce the risk of damage to objects. The specific test method can vary according to different application scenarios. Among them, the most widely used test method is the standard drop ball impact test, which is used to evaluate the impact absorption capacity of foam. A certain mass of heavy objects is freely dropped from a certain height onto the surface where the foam is laid. Then, the deformation and compression degree of the foam after the impact or the degree of damage to the objects under the foam are measured to evaluate the impact resistance of the foam. The foam's resilience and energy absorption capacity during the impact are observed for evaluation; the foam impact force test device in the prior art is usually unable to automatically perform multiple impact tests on the foam, and the test process requires manual intervention, and the degree of automation is insufficient. Summary of the invention

[0003] In view of the above technical problems, the technical solution adopted by the present invention is: a foam impact resistance test device, comprising a placement device for placing foam, the placement device comprising a base, the placement device is provided with an adjustment device for adjusting the test height, the adjustment device comprises two rear outer jackets, the rear outer jackets are fixedly mounted on the base, an inner slide cylinder is slidably mounted in the rear outer jackets, the adjustment device is provided with a release device for performing an impact test on the foam, the release device comprises a top plate, and the top plate is fixedly mounted with the inner slide cylinder;

[0004] The placing device comprises a support plate, on which two clamping frames are slidably mounted, on which two angles are fixedly mounted, a lower pressing frame is slidably mounted on the support plate, and on which a lower pressing disc is fixedly mounted;

[0005] The release device comprises a transmission gear rotatably mounted on the top plate, a winding wheel and a steering wheel rotatably mounted on the top plate, a winding rope wound on the winding wheel, the winding rope passes over the steering wheel, and an impact ball is fixedly mounted on the end of the winding rope.

[0006] Furthermore, the placing device also includes feet fixedly installed at the four corners of the bottom of the base, an inner rotating frame is fixedly installed in the base, an extended-range rotating rod is rotatably installed on the inner rotating frame, an inner slide is fixedly installed in the support plate, a lower pressure frame and the inner slide are slidably installed, a lower pressure spring is arranged between the lower pressure disc and the support plate, and the lower pressure frame is in contact with the extended-range rotating rod.

[0007] Furthermore, four friction frames are fixedly installed under the support plate, internal racks are fixedly installed under the two clamping frames, an internal gear frame is fixedly installed under the support plate, an internal gear is rotatably installed on the internal gear frame, both internal racks are meshed with the internal gear, a side sliding column is slidably installed in the clamping frame, an internal support spring is arranged between the side sliding column and the clamping frame, a friction plate is fixedly installed on the side sliding column, and the internal support spring makes the friction plate and the friction frame fit tightly.

[0008] Furthermore, four inner sliding columns are fixedly installed below the support plate, four outer sleeves are fixedly installed inside the base, the inner sliding columns and the outer sleeves are slidably installed, and a buffer spring is arranged between the inner sliding columns and the base.

[0009] When in use, place the foam between the four angles, and then manually slide the angle inward. When the angle slides inward, it will drive the clamping frame and the inner rack to slide inward at the same time. Through the action of the internal gear, the four angles are driven to slide inward at the same time, and the friction plate and the friction frame are tightly attached through the internal support spring, so that the position of the foam remains unchanged after the hand is released.

[0010] When the impact ball impacts the foam, the foam is deformed, and the impact force presses the downward pressure disc, thereby driving the downward pressure frame to descend, and the downward pressure frame drives the range-extending rotating rod to rotate, and the rotation of the range-extending rotating rod drives the lifting outer rod to rise. Since the length of the side of the range-extending rotating rod in contact with the downward pressure frame is shorter than the length of the side of the range-extending rotating rod in contact with the lifting outer rod, the rising stroke of the lifting outer rod is greater than the descending stroke of the downward pressure frame, and the range-extending rotating rod plays the role of amplifying the stroke.

[0011] When the foam on the support plate is impacted, the four buffer springs act as a buffer.

[0012] Furthermore, the adjustment device includes a cross bar fixedly installed between the two inner slide cylinders, a lifting outer rod is slidably installed on the base, a lifting inner rod is fixedly installed in the lifting outer rod by a quick-pressing screw, when the quick-pressing screw is opened, the lifting inner rod can slide relative to the lifting outer rod, a limiting ring is fixedly installed on the lifting inner rod, in the initial state, the limiting ring contacts the cross bar, a top rack is fixedly installed on the top of the lifting inner rod, and the top rack is meshed with the transmission gear.

[0013] Furthermore, an adjustment motor is fixedly installed in the base, a motor bevel gear is fixedly installed on the motor shaft of the adjustment motor, a gear shaft is rotatably installed in the base, an upper bevel gear and an upper transmission wheel are fixedly installed on the gear shaft, two inner screws are rotatably installed in the base, an outer transmission wheel is fixedly installed on the inner screw, and a triangular transmission belt is wrapped around the upper transmission wheel and the two outer transmission wheels.

[0014] Furthermore, an inner convex ball is fixedly mounted on the bottom of the inner wall of the inner slide cylinder, and the inner convex ball slides in the thread of the inner screw rod.

[0015] Before conducting the test, first adjust the height of the top plate to adjust the strength of the impact test, open the quick-pressing screw first, then the inner lift rod can slide relative to the outer lift rod, adjust the motor to drive the motor bevel gear to rotate, thereby driving the upper bevel gear, gear shaft and upper transmission wheel to rotate, and drive the two outer transmission wheels to rotate through the triangular transmission belt, thereby driving the two inner screws to rotate at the same time, and the rotation of the inner screw drives the inner slide cylinder to rise and fall along the rear outer sleeve through the inner convex ball, thereby adjusting the height of the top plate, and when the inner slide cylinder rises and falls, it drives the cross bar to rise and fall at the same time, and the cross bar drives the lift inner rod to rise and fall at the same time through the limit ring, and the lift inner rod and the lift outer rod slide relative to each other, and during the lifting process of the inner slide cylinder and the cross bar, the top rack keeps meshing with the transmission gear, and after the adjustment is completed, the lift inner rod and the lift outer rod are locked by the quick-pressing screw.

[0016] Furthermore, the releasing device also includes a winding motor fixedly mounted on the top plate, a motor wheel fixedly mounted on the motor shaft of the winding motor, a rotating shaft rotatably mounted on the top plate, a transmission wheel fixedly mounted on the rotating shaft, an output transmission belt wrapped around the transmission wheel and the motor wheel, and a winding bevel gear fixedly mounted on the winding wheel.

[0017] Furthermore, an engaging push rod is slidably installed on the top plate, a pushing rack is fixedly installed on the engaging push rod, the pushing rack is engaged with the transmission gear, an engaging push plate is fixedly installed on the engaging push rod, the engaging push plate is rotatably installed with the rotating shaft, and a push rod spring is arranged between the engaging push rod and the top plate.

[0018] Furthermore, an upper sliding sleeve is fixedly installed under the top plate, an upper sliding column is slidably installed in the upper sliding sleeve, an upper ring is fixedly installed under the upper sliding column, an upper spring is arranged between the upper ring and the upper sliding sleeve, an upper trapezoidal block is fixedly installed on the upper sliding column, a pushing block is slidably installed on the top plate, an inner pushing trapezoidal block is fixedly installed on the pushing block, the inner pushing trapezoidal block cooperates with the upper trapezoidal block, a disengagement sliding rod and a disengagement push rod are fixedly installed on the pushing block, the disengagement sliding rod is slidably installed with the top plate, a sliding rod spring is arranged between the pushing block and the top plate, a disengagement push plate is fixedly installed on the disengagement push rod, and the disengagement push plate is rotatably installed with the rotating shaft.

[0019] Furthermore, a slide groove, an engaging hole and a disengaging hole are provided on the rotating shaft, and an active bevel gear is slidably installed on the rotating shaft through the slide groove. The active bevel gear is engaged with the winding bevel gear, and two locking balls are slidably installed in the active bevel gear. A locking ball spring is provided between the locking ball and the active bevel gear. In the initial state, the locking ball is located in the engaging hole.

[0020] The winding motor drives the motor wheel to rotate, and drives the transmission wheel, the rotating shaft and the active bevel gear to rotate by lifting the outer rod, drives the winding bevel gear and the winding wheel to rotate, and winds the winding rope. The winding rope drives the impact ball to rise. When the impact ball contacts the upper top ring, the impact ball drives the upper top ring, the upper top sliding column and the upper top trapezoidal block to rise. The upper top spring is compressed, and the upper top trapezoidal block pushes the inner push trapezoidal block, the push block, the disengagement push rod and the disengagement push plate to slide to the right. The slide rod spring is compressed, and the disengagement push plate pushes the active bevel gear to slide along the slide groove, and the active bevel gear and the winding bevel gear The wheel disengages, the card ball leaves the meshing card hole, the card ball spring is compressed, the disengagement push plate pushes the active bevel gear to the disengagement card hole, the card ball spring rebounds, and the card ball is stuck in the disengagement card hole. When the active bevel gear is disengaged from the winding bevel gear, the impact ball begins to fall under the action of its own weight, the winding wheel no longer winds up the winding rope, the winding rope drives the winding wheel to rotate, the impact ball falls on the foam, the upper trapezoidal block and the upper ring are reset under the rebound of the upper spring, the inner push trapezoidal block and the disengagement push plate are reset under the rebound of the slide rod spring, and the lower pressure The disc is pressed down, thereby driving the lower pressure frame to descend, and the lower pressure frame drives the range-extending rotating rod to rotate, and the rotation of the range-extending rotating rod drives the lifting outer rod to rise. Since the length of the side of the range-extending rotating rod in contact with the lower pressure frame is smaller than the length of the side of the range-extending rotating rod in contact with the lifting outer rod, the rising stroke of the lifting outer rod is greater than the descending stroke of the lower pressure frame. The rising of the lifting outer rod drives the lifting inner rod and the top rack to rise, thereby driving the transmission gear to rotate, driving the push rack, the meshing push rod and the meshing push plate to slide, the push rod spring is compressed, and the meshing push plate pushes the active bevel gear, so that the meshing card hole is disengaged from The card hole leaves, the card ball spring is compressed, and the meshing push plate pushes the active bevel gear along the slide groove to the meshing card hole. At this time, the card ball spring rebounds, and the card ball enters the meshing card hole. The active bevel gear meshes with the winding bevel gear again. At this time, the winding motor rotates to drive the winding wheel to wind up the winding rope, driving the impact ball to rise, and it goes back and forth. When the impact ball has finished impacting the foam, the downward pressure spring rebounds and drives the downward pressure disc to reset. The push rod spring rebounds with the deadweight of the lifting inner rod and the lifting outer rod, so that the meshing push plate, the lifting inner rod and the lifting outer rod are reset, and it goes back and forth.

[0021] Compared with the prior art, the present invention has the following beneficial effects: (1) the placement device provided in the present invention can fix and clamp the foam placed thereon, so that the position of the foam itself will not change when undergoing the impact test, thereby ensuring the smooth progress of the impact force test. At the same time, when the downward pressure disc is pressed down, the winding wheel starts to wind again, thereby realizing automatic and continuous testing; (2) the adjustment device provided in the present invention can adjust the release height of the impact ball, thereby performing impact force tests of different impact forces on the foam. At the same time, when the height of the top plate changes, the relative positions of the lifting inner rod and the lifting outer rod change synchronously, thereby realizing the fully automatic descent and reset process of the impact ball smoothly; (3) after the release device provided in the present invention lifts the impact ball to the highest point, the impact ball is automatically released to perform the impact force test on the foam. After the foam impact force test is completed, the impact ball is automatically wound up under the action of the downward pressure disc, thereby realizing the fully automatic impact test, with a high degree of automation and good continuity. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 The structure of the placement device of the present invention is shown in FIG. Figure 1 .

[0024] Figure 3 The structure of the placement device of the present invention is shown in FIG. Figure 2 .

[0025] Figure 4 The structure of the placement device of the present invention is shown in FIG. Figure 3 .

[0026] Figure 5 The structure of the placement device of the present invention is shown in FIG. Figure 4 .

[0027] Figure 6 The structure of the adjusting device of the present invention is shown in FIG. Figure 1 .

[0028] Figure 7 for Figure 6 A local enlarged schematic diagram of point A in the middle.

[0029] Figure 8 The structure of the adjusting device of the present invention is shown in FIG. Figure 2 .

[0030] Fig. 9 for Figure 8 A local enlarged schematic diagram of point B in the middle.

[0031] Fig.10 The structure of the release device of the present invention is shown in FIG. Figure 1 .

[0032] Fig.11 The structure of the release device of the present invention is shown in FIG. Figure 2 .

[0033] Fig.12 The structure of the release device of the present invention is shown in FIG. Figure 3 .

[0034] Figure numbers: 101-base; 102-foot; 103-support plate; 104-angle; 105-clamp frame; 106-internal rack; 107-internal gear frame; 108-internal gear; 109-friction frame; 110-friction plate; 111-side sliding column; 112-inner support spring; 113-downward pressure disc; 114-downward pressure frame; 115-downward pressure spring; 116-inner sliding frame; 117-inner rotating frame; 118-extended range rotating rod; 119 - inner slide column; 120 - outer sleeve; 121 - buffer spring; 201 - rear outer sleeve; 202 - adjustment motor; 203 - motor bevel gear; 204 - gear shaft; 205 - upper bevel gear; 206 - upper transmission wheel; 207 - triangular transmission belt; 208 - inner slide cylinder; 209 - lifting outer rod; 210 - lifting inner rod; 211 - limit ring; 212 - cross bar; 213 - top rack; 214 - inner screw rod; 215 - inner convex ball; 216 -external transmission wheel; 217-quick-press screw; 301-top plate; 302-transmission gear; 303-impact ball; 304-rewinding wheel; 305-rewinding rope; 306-rewinding bevel gear; 307-rewinding motor; 308-motor wheel; 309-output transmission belt; 310-transmission wheel; 311-rotating shaft; 312-active bevel gear; 313-disengagement push plate; 314-disengagement push rod; 315-engagement push rod; 316-push rack ; 317-push rod spring; 318-engagement push plate; 319-disengagement slide rod; 320-push block; 321-slide rod spring; 322-inward push trapezoidal block; 323-steering wheel; 324-upper trapezoidal block; 325-upper slide column; 326-upper ring; 327-upper spring; 328-upper slide sleeve; 329-card ball; 330-card ball spring; 331-engagement card hole; 332-disengagement card hole; 333-slide groove; 4-foam. DETAILED DESCRIPTION

[0035] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0036] Example: Reference Figure 1-Figure 12A foam impact resistance test device, comprising a placing device for placing foam 4, the placing device comprising a base 101, an adjusting device for adjusting the test height is arranged on the placing device, the adjusting device comprises two rear outer jackets 201, the rear outer jackets 201 are fixedly mounted on the base 101, an inner slide 208 is slidably mounted in the rear outer jackets 201, a releasing device for performing an impact test on the foam 4 is arranged on the adjusting device, the releasing device comprises a top plate 301, and the top plate 301 is fixedly mounted with the inner slide 208;

[0037] The placement device includes a support plate 103, two clamping frames 105 are slidably mounted on the support plate 103, two angles 104 are fixedly mounted on the clamping frames 105, a lower pressing frame 114 is slidably mounted on the support plate 103, and a lower pressing disc 113 is fixedly mounted on the lower pressing frame 114;

[0038] The release device includes a transmission gear 302 rotatably mounted on the top plate 301, on which a winding wheel 304 and a steering wheel 323 are rotatably mounted, a winding rope 305 is wound around the winding wheel 304, the winding rope 305 passes over the steering wheel 323, and an impact ball 303 is fixedly mounted at the end of the winding rope 305.

[0039] like Figure 2-Figure 5 As shown, the placement device also includes a base 102 fixedly installed at the four corners of the bottom of the base 101, an inner rotating frame 117 is fixedly installed in the base 101, an extended-range rotating rod 118 is rotatably installed on the inner rotating frame 117, an inner slide 116 is fixedly installed in the support plate 103, a lower pressure frame 114 is slidably installed with the inner slide 116, a lower pressure spring 115 is arranged between the lower pressure disc 113 and the support plate 103, and the lower pressure frame 114 is in contact with the extended-range rotating rod 118.

[0040] like Figure 2-Figure 5 As shown, four friction frames 109 are fixedly installed under the support plate 103, inner racks 106 are fixedly installed under the two clamping frames 105, an inner gear frame 107 is fixedly installed under the support plate 103, an inner gear 108 is rotatably installed on the inner gear frame 107, and the two inner racks 106 are meshed with the inner gear 108, a side sliding column 111 is slidably installed in the clamping frame 105, an inner support spring 112 is arranged between the side sliding column 111 and the clamping frame 105, a friction plate 110 is fixedly installed on the side sliding column 111, and the inner support spring 112 makes the friction plate 110 fit tightly against the friction frame 109.

[0041] like Figure 2-Figure 5 As shown, four inner sliding columns 119 are fixedly installed below the support plate 103, four outer sleeves 120 are fixedly installed inside the base 101, the inner sliding columns 119 and the outer sleeves 120 are slidably installed, and a buffer spring 121 is provided between the inner sliding columns 119 and the base 101.

[0042] When in use, place the foam 4 between the four angles 104, and then manually slide the angle 104 inward. When the angle 104 slides inward, it will drive the clamping frame 105 and the inner rack 106 to slide inward at the same time. Through the action of the internal gear 108, the four angles 104 are driven to slide inward at the same time, and the friction plate 110 is tightly attached to the friction frame 109 through the internal support spring 112, so that after the hand is released, the position of the foam 4 remains unchanged.

[0043] When the impact ball 303 impacts the foam 4, the foam 4 is deformed, and the impact force presses the downward pressure disc 113, thereby driving the downward pressure frame 114 to descend, and the downward pressure frame 114 drives the range-extending rotating rod 118 to rotate, and the rotation of the range-extending rotating rod 118 drives the lifting outer rod 209 to rise. Since the length of the side where the range-extending rotating rod 118 contacts the downward pressure frame 114 is shorter than the length of the side where the range-extending rotating rod 118 contacts the lifting outer rod 209, the rising stroke of the lifting outer rod 209 is greater than the descending stroke of the downward pressure frame 114, and the range-extending rotating rod 118 plays a role in amplifying the stroke.

[0044] When the foam 4 on the support plate 103 is impacted, the four buffer springs 121 play a buffering role.

[0045] like Figure 6-Figure 9 As shown, the adjustment device includes a cross bar 212 fixedly installed between the two inner slide cylinders 208, a lifting outer rod 209 is slidably installed on the base 101, and a lifting inner rod 210 is fixedly installed in the lifting outer rod 209 through a quick-pressing screw 217. When the quick-pressing screw 217 is opened, the lifting inner rod 210 can slide relative to the lifting outer rod 209, and a limiting ring 211 is fixedly installed on the lifting inner rod 210. In the initial state, the limiting ring 211 contacts the cross bar 212, and a top rack 213 is fixedly installed on the top of the lifting inner rod 210, and the top rack 213 is meshed with the transmission gear 302.

[0046] like Figure 6-Figure 9 As shown, an adjustment motor 202 is fixedly installed in the base 101, a motor bevel gear 203 is fixedly installed on the motor shaft of the adjustment motor 202, a gear shaft 204 is rotatably installed in the base 101, an upper bevel gear 205 and an upper transmission wheel 206 are fixedly installed on the gear shaft 204, two inner screw rods 214 are rotatably installed in the base 101, an outer transmission wheel 216 is fixedly installed on the inner screw rod 214, and a triangular transmission belt 207 is wound around the upper transmission wheel 206 and the two outer transmission wheels 216.

[0047] like Figure 6-Figure 9 As shown, an inner convex ball 215 is fixedly installed on the bottom of the inner wall of the inner slide cylinder 208, and the inner convex ball 215 slides in the thread of the inner screw rod 214.

[0048] Before the test, the height of the top plate 301 is adjusted first to adjust the strength of the impact test, and the quick-pressing screw 217 is opened first. At this time, the lifting inner rod 210 can slide relative to the lifting outer rod 209, and the motor 202 is adjusted to drive the motor bevel gear 203 to rotate, thereby driving the upper bevel gear 205, the gear shaft 204 and the upper transmission wheel 206 to rotate, and the two outer transmission wheels 216 are driven to rotate through the triangular transmission belt 207, thereby driving the two inner screw rods 214 to rotate at the same time, and the inner screw rod 214 rotates through the inner convex ball 215 The inner slide 208 is driven to rise and fall along the rear outer sleeve 201, thereby adjusting the height of the top plate 301. When the inner slide 208 is raised and lowered, the cross bar 212 is driven to rise and fall at the same time. The cross bar 212 drives the lifting inner rod 210 to rise and fall at the same time through the limit ring 211. The lifting inner rod 210 and the lifting outer rod 209 slide relative to each other. During the lifting process of the inner slide 208 and the cross bar 212, the top rack 213 keeps meshing with the transmission gear 302. After the adjustment is completed, the lifting inner rod 210 and the lifting outer rod 209 are locked by the quick-pressing screw 217.

[0049] like Figure 10-12 As shown, the releasing device also includes a winding motor 307 fixedly mounted on the top plate 301, a motor wheel 308 is fixedly mounted on the motor shaft of the winding motor 307, a rotating shaft 311 is rotatably mounted on the top plate 301, a transmission wheel 310 is fixedly mounted on the rotating shaft 311, an output transmission belt 309 is wound around the transmission wheel 310 and the motor wheel 308, and a winding bevel gear 306 is fixedly mounted on the winding wheel 304.

[0050] like Figure 10-12 As shown, an engaging push rod 315 is slidably installed on the top plate 301, and a pushing rack 316 is fixedly installed on the engaging push rod 315. The pushing rack 316 is engaged with the transmission gear 302, and an engaging push plate 318 is fixedly installed on the engaging push rod 315. The engaging push plate 318 is rotatably installed with the rotating shaft 311, and a push rod spring 317 is arranged between the engaging push rod 315 and the top plate 301.

[0051] like Figure 10-12As shown, an upper sliding sleeve 328 is fixedly installed below the top plate 301, and an upper sliding column 325 is slidably installed in the upper sliding sleeve 328, and an upper ring 326 is fixedly installed below the upper sliding column 325, and an upper spring 327 is arranged between the upper ring 326 and the upper sliding sleeve 328, and an upper trapezoidal block 324 is fixedly installed on the upper sliding column 325, and a pushing block 320 is slidably installed on the top plate 301, and an inner pushing trapezoidal block 322 is fixedly installed on the pushing block 320, and the inner pushing trapezoidal block 322 cooperates with the upper trapezoidal block 324, and a disengagement slide bar 319 and a disengagement push rod 314 are fixedly installed on the pushing block 320, and the disengagement slide bar 319 is slidably installed with the top plate 301, and a slide bar spring 321 is arranged between the pushing block 320 and the top plate 301, and a disengagement push plate 313 is fixedly installed on the disengagement push rod 314, and the disengagement push plate 313 is rotatably installed with the rotating shaft 311.

[0052] like Figure 10-12 As shown, a slide groove 333, an engaging hole 331 and a disengaging hole 332 are provided on the rotating shaft 311, and an active bevel gear 312 is slidably installed on the rotating shaft 311 through the slide groove 333. The active bevel gear 312 is engaged with the winding bevel gear 306. Two locking balls 329 are slidably installed in the active bevel gear 312. A locking ball spring 330 is provided between the locking ball 329 and the active bevel gear 312. In the initial state, the locking ball 329 is located in the engaging hole 331.

[0053] The winding motor 307 drives the motor wheel 308 to rotate, and drives the transmission wheel 310, the rotating shaft 311 and the active bevel gear 312 to rotate by lifting the outer rod 209, and drives the winding bevel gear 306 and the winding wheel 304 to rotate, so as to wind up the winding rope 305, and the winding rope 305 drives the impact ball 303 to rise. When the impact ball 303 contacts the upper top ring 326, the impact ball 303 drives the upper top ring 326, the upper top slide column 325 and the upper top trapezoidal block 324 to rise, the upper top spring 327 is compressed, and the upper top trapezoidal block 324 pushes the inner push trapezoidal block 322, the push block 320, the disengagement push rod 314 and the disengagement push plate 313 to slide to the right, the slide rod spring 321 is compressed, and the disengagement push plate 313 pushes the active bevel gear 312 along the slide groove 33 3, the active bevel gear 312 is disengaged from the winding bevel gear 306, the card ball 329 leaves the meshing card hole 331, the card ball spring 330 is compressed, the disengagement push plate 313 pushes the active bevel gear 312 to the disengagement card hole 332, the card ball spring 330 rebounds, so that the card ball 329 is stuck in the disengagement card hole 332, when the active bevel gear 312 is disengaged from the winding bevel gear 306, under the action of the impact ball 303's own weight, the impact ball 303 begins to fall, the winding wheel 304 no longer rewinds the winding rope 305, the winding rope 305 drives the winding wheel 304 to rotate, the impact ball 303 falls on the foam 4, the upper trapezoidal block 324 and the upper ring 326 are reset under the rebound of the upper spring 327, and the inner push trapezoidal block 322, The disengaged push plate 313 is reset under the rebound of the slide rod spring 321, and the downward pressure disc 113 is pressed down, thereby driving the lower pressure frame 114 to descend, and the lower pressure frame 114 drives the range-extending rotating rod 118 to rotate, and the rotation of the range-extending rotating rod 118 drives the lifting outer rod 209 to rise. Since the length of the side of the range-extending rotating rod 118 in contact with the lower pressure frame 114 is less than the length of the side of the range-extending rotating rod 118 in contact with the lifting outer rod 209, the rising stroke of the lifting outer rod 209 is greater than the descending stroke of the lower pressure frame 114. The rising of the lifting outer rod 209 drives the lifting inner rod 210 and the top rack 213 to rise, thereby driving the transmission gear 302 to rotate, driving the push rack 316, the meshing push rod 315 and the meshing push plate 318 to slide, and the push rod spring 317 is compressed. The push plate 318 pushes the active bevel gear 312, so that the meshing hole 331 leaves the disengaging hole 332, and the ball spring 330 is compressed. The meshing push plate 318 pushes the active bevel gear 312 along the slide groove 333 to the meshing hole 331. At this time, the ball spring 330 rebounds, and the ball 329 enters the meshing hole 331. The active bevel gear 312 meshes with the winding bevel gear 306 again. At this time, the winding motor 307 rotates to drive the winding wheel 304 to wind up the winding rope 305, driving the impact ball 303 to rise. This reciprocating cycle, when the impact ball 303 has finished impacting the foam 4, the downward pressure spring 115 rebounds to drive the downward pressure disc 113 to reset, and the push rod spring 317 rebounds to cooperate with the dead weight of the lifting inner rod 210 and the lifting outer rod 209.The engagement push plate 318, the lifting inner rod 210 and the lifting outer rod 209 are reset, and the process is repeated.

[0054] The working principle of a foam impact resistance test device disclosed in the present invention is as follows: before the test, the height of the top plate 301 is first adjusted to adjust the strength of the impact test, and the quick-pressing screw 217 is first opened. At this time, the lifting inner rod 210 can slide relative to the lifting outer rod 209, and the motor 202 is adjusted to drive the motor bevel gear 203 to rotate, thereby driving the upper bevel gear 205, the gear shaft 204 and the upper transmission wheel 206 to rotate, and the two outer transmission wheels 216 are driven to rotate through the triangular transmission belt 207, thereby driving the two inner screw rods 214 to rotate at the same time, and the inner screw rods 202 are driven to rotate. The inner slide 208 is driven to rise and fall along the rear outer sleeve 201 by rotating the inner convex ball 215, so as to adjust the height of the top plate 301. When the inner slide 208 rises and falls, the cross bar 212 is driven to rise and fall at the same time. The cross bar 212 drives the lifting inner rod 210 to rise and fall at the same time through the limit ring 211. The lifting inner rod 210 and the lifting outer rod 209 slide relative to each other. During the lifting and falling process of the inner slide 208 and the cross bar 212, the top rack 213 keeps meshing with the transmission gear 302. After the adjustment is completed, the lifting inner rod 210 and the lifting outer rod 209 are locked by the quick-pressing screw 217. When in use, place the foam 4 between the four angles 104, and then manually slide the angle 104 inward. When the angle 104 slides inward, it will drive the clamping frame 105 and the inner rack 106 to slide inward at the same time. Through the action of the internal gear 108, the four angles 104 are driven to slide inward at the same time, and the friction plate 110 is tightly attached to the friction frame 109 through the internal support spring 112, so that after the hand is released, the position of the foam 4 remains unchanged. The winding motor 307 drives the motor wheel 308 to rotate, and drives the transmission wheel 310, the rotating shaft 311 and the active bevel gear 312 to rotate by lifting the outer rod 209, drives the winding bevel gear 306 and the winding wheel 304 to rotate, and winds the winding rope 305. The winding rope 305 drives the impact ball 303 to rise. When the impact ball 303 contacts the upper top ring 326, the impact ball 303 drives the upper top ring 326, the upper top slide column 325 and the upper top trapezoidal block 324 to rise, the upper top spring 327 is compressed, and the upper top trapezoidal block 324 pushes the inner push trapezoidal block 322, the push block 320, the disengagement push rod 314 and the disengagement push plate 313 to slide to the right, the slide rod spring 321 is compressed, and the disengagement push plate 313 pushes the active bevel gear 312 along The locking ball 329 is locked in the disengagement hole 332. The locking ball 329 is locked in the disengagement hole 332. When the driving bevel gear 312 is disengaged from the winding bevel gear 306, the impact ball 303 starts to fall under the action of its own weight. The winding wheel 304 no longer rewinds the winding rope 305. The winding rope 305 drives the winding wheel 304 to rotate, and the impact ball 303 falls on the foam 4. The upper trapezoidal block 324 and the upper ring 326 are reset under the rebound of the upper spring 327.The inner push trapezoidal block 322 and the disengagement push plate 313 are reset under the rebound of the slide rod spring 321, and the downward pressure disc 113 is pressed down, thereby driving the lower pressure frame 114 to descend, and the lower pressure frame 114 drives the range-extending rotating rod 118 to rotate, and the rotation of the range-extending rotating rod 118 drives the lifting outer rod 209 to rise. Since the length of the side of the range-extending rotating rod 118 in contact with the lower pressure frame 114 is less than the length of the side of the range-extending rotating rod 118 in contact with the lifting outer rod 209, the rising stroke of the lifting outer rod 209 is greater than the descending stroke of the lower pressure frame 114. The rising of the lifting outer rod 209 drives the lifting inner rod 210 and the top rack 213 to rise, thereby driving the transmission gear 302 to rotate, driving the push rack 316, the meshing push rod 315 and the meshing push plate 318 to slide, the push rod spring 317 is compressed, and the meshing push plate 318 pushes the active bevel gear 312, so that the meshing hole 331 leaves the disengaging hole 332, the ball spring 330 is compressed, the meshing push plate 318 pushes the active bevel gear 312 along the slide groove 333 to the meshing hole 331, at this time the ball spring 330 rebounds, the ball 329 enters the meshing hole 331, the active bevel gear 312 meshes with the winding bevel gear 306 again, at this time the winding motor 307 rotates to drive the winding wheel 304 to wind up the winding rope 305, driving the impact ball 303 to rise, and so on, when the impact ball 303 has finished impacting the foam 4, the downward pressure spring 115 rebounds to drive the downward pressure disc 113 to reset, the push rod spring 317 rebounds with the dead weight of the lifting inner rod 210 and the lifting outer rod 209, so that the meshing push plate 318, the lifting inner rod 210 and the lifting outer rod 209 are reset, and so on.

[0055] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A foam impact resistance testing device, comprising a placement device for placing foam (4), characterized in that: The placing device comprises a base (101), an adjusting device for adjusting the test height is arranged on the placing device, the adjusting device comprises two rear outer sleeves (201), the rear outer sleeves (201) are fixedly mounted on the base (101), an inner slide cylinder (208) is slidably mounted inside the rear outer sleeves (201), a releasing device for performing an impact test on the foam (4) is arranged on the adjusting device, the releasing device comprises a top plate (301), the top plate (301) and the inner slide cylinder (208) are fixedly mounted; The placement device comprises a support plate (103), two clamping frames (105) are slidably mounted on the support plate (103), two angles (104) are fixedly mounted on the clamping frames (105), a lower pressing frame (114) is slidably mounted on the support plate (103), and a lower pressing disc (113) is fixedly mounted on the lower pressing frame (114); The release device comprises a transmission gear (302) rotatably mounted on a top plate (301); a winding wheel (304) and a steering wheel (323) are rotatably mounted on the top plate (301); a winding rope (305) is wound around the winding wheel (304); the winding rope (305) passes over the steering wheel (323); and an impact ball (303) is fixedly mounted on the end of the winding rope (305).

2. A foam impact resistance testing device according to claim 1, characterized in that: The placement device also includes a base (102) fixedly mounted at the four corners of the bottom of the base (101); an inner rotating frame (117) is fixedly mounted in the base (101); an extended-range rotating rod (118) is rotatably mounted on the inner rotating frame (117); an inner sliding frame (116) is fixedly mounted in the support plate (103); a lower pressure frame (114) is slidably mounted with the inner sliding frame (116); a lower pressure spring (115) is arranged between the lower pressure disc (113) and the support plate (103); the lower pressure frame (114) is in contact with the extended-range rotating rod (118); four inner sliding columns (119) are fixedly mounted below the support plate (103); four outer sleeves (120) are fixedly mounted in the base (101); the inner sliding columns (119) are slidably mounted with the outer sleeve (120); and a buffer spring (121) is arranged between the inner sliding columns (119) and the base (101).

3. A foam impact resistance testing device according to claim 1, characterized in that: Four friction racks (109) are fixedly installed below the support plate (103), inner racks (106) are fixedly installed below the two clamping racks (105), an inner gear rack (107) is fixedly installed below the support plate (103), an inner gear (108) is rotatably installed on the inner gear rack (107), and the two inner racks (106) are meshed with the inner gear (108), a side sliding column (111) is slidably installed inside the clamping rack (105), an inner support spring (112) is arranged between the side sliding column (111) and the clamping rack (105), a friction plate (110) is fixedly installed on the side sliding column (111), and the inner support spring (112) makes the friction plate (110) and the friction rack (109) closely attached.

4. A foam impact resistance testing device according to claim 1, characterized in that: The adjustment device comprises a cross bar (212) fixedly mounted between two inner slide cylinders (208); a lifting outer rod (209) is slidably mounted on the base (101); a lifting inner rod (210) is fixedly mounted inside the lifting outer rod (209) via a quick-pressing screw (217); when the quick-pressing screw (217) is opened, the lifting inner rod (210) can slide relative to the lifting outer rod (209); a limiting ring (211) is fixedly mounted on the lifting inner rod (210); in an initial state, the limiting ring (211) contacts the cross bar (212); a top rack (213) is fixedly mounted on the top of the lifting inner rod (210); and the top rack (213) is meshed with a transmission gear (302).

5. The foam impact resistance testing device according to claim 1, characterized in that: An adjustment motor (202) is fixedly installed in the base (101), a motor bevel gear (203) is fixedly installed on the motor shaft of the adjustment motor (202), a gear shaft (204) is rotatably installed in the base (101), an upper bevel gear (205) and an upper transmission wheel (206) are fixedly installed on the gear shaft (204), two inner screws (214) are rotatably installed in the base (101), an outer transmission wheel (216) is fixedly installed on the inner screw (214), a triangular transmission belt (207) is wound around the upper transmission wheel (206) and the two outer transmission wheels (216), an inner convex ball (215) is fixedly installed on the bottom of the inner wall of the inner slide cylinder (208), and the inner convex ball (215) slides in the thread of the inner screw (214).

6. The foam impact resistance testing device according to claim 1, characterized in that: The release device also includes a winding motor (307) fixedly mounted on the top plate (301), a motor wheel (308) fixedly mounted on the motor shaft of the winding motor (307), a rotating shaft (311) rotatably mounted on the top plate (301), a transmission wheel (310) fixedly mounted on the rotating shaft (311), an output transmission belt (309) wound around the transmission wheel (310) and the motor wheel (308), and a winding bevel gear (306) fixedly mounted on the winding wheel (304).

7. A foam impact resistance testing device according to claim 6, characterized in that: An engaging push rod (315) is slidably mounted on the top plate (301), a pushing rack (316) is fixedly mounted on the engaging push rod (315), the pushing rack (316) is engaged with the transmission gear (302), an engaging push plate (318) is fixedly mounted on the engaging push rod (315), the engaging push plate (318) is rotatably mounted on the rotating shaft (311), and a push rod spring (317) is arranged between the engaging push rod (315) and the top plate (301).

8. The foam impact resistance testing device according to claim 6, characterized in that: An upper sliding sleeve (328) is fixedly installed below the top plate (301), an upper sliding column (325) is slidably installed in the upper sliding sleeve (328), an upper ring (326) is fixedly installed below the upper sliding column (325), an upper spring (327) is arranged between the upper ring (326) and the upper sliding sleeve (328), an upper trapezoidal block (324) is fixedly installed on the upper sliding column (325), a pushing block (320) is slidably installed on the top plate (301), and a pushing block (320) is fixedly installed on the pushing block (320). An inner push trapezoidal block (322) is provided, the inner push trapezoidal block (322) cooperates with an upper trapezoidal block (324), a disengagement slide bar (319) and a disengagement push rod (314) are fixedly installed on the push block (320), the disengagement slide bar (319) is slidably installed with the top plate (301), a slide bar spring (321) is provided between the push block (320) and the top plate (301), a disengagement push plate (313) is fixedly installed on the disengagement push rod (314), and the disengagement push plate (313) is rotatably installed with the rotating shaft (311).

9. A foam impact resistance testing device according to claim 6, characterized in that: The rotating shaft (311) is provided with a slide groove (333), an engaging clamping hole (331) and a disengaging clamping hole (332); an active bevel gear (312) is slidably mounted on the rotating shaft (311) through the slide groove (333); the active bevel gear (312) is engaged with the winding bevel gear (306); two clamping balls (329) are slidably mounted in the active bevel gear (312); a clamping ball spring (330) is provided between the clamping ball (329) and the active bevel gear (312); in an initial state, the clamping ball (329) is located in the engaging clamping hole (331).

10. The testing method of a foam impact resistance testing device according to claim 1, characterized in that: The steps are as follows:

1. adjusting the height of the release device according to the required impact force; 2. placing the foam (4) on the placement device and fixing the foam (4) through the placement device; 3. lifting the impact ball (303) to the highest position; 4. releasing the impact ball (303) to perform an impact force test on the foam (4); 5. driving the impact ball (303) to rise to the highest position to perform multiple tests; 6. adjusting the release device to different heights and repeating the test multiple times.

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