Motorcycle helmet and compression resistance testing device thereof

Abstract

The invention relates to the technical field of compression resistance testing, in particular to a motorcycle helmet and a compression resistance testing device thereof.The motorcycle helmet comprises a placing table used for placing the helmet during compression resistance testing, the helmet comprises a shell, goggles arranged in the middles of the two sides of the shell in a co-rotating mode, and hat belts arranged on the two sides of the lower portion of the shell in a co-rotating mode; according to the device, a guide rod slides down along a guide frame, finally, a falling frame drives a contact roller to downwards shoot down a helmet, and due to the fact that a pressure sensor is arranged on the contact roller, the helmet can be conveniently taken down, the helmet can be conveniently taken down, and the helmet can be conveniently taken down. The pressure sensor can monitor the pressure when the contact roller is knocked down, due to the principle of gravitational acceleration, a gravity block is additionally arranged on the weighting box, and therefore the larger the force generated when the contact roller falls at the same height is, the larger the contact roller falls down. Compared with the prior art, the helmet pressure test device can quickly perform pressure resistance tests under different pressures when pressure tests are performed on the helmet.

Description

Technical Field

[0001] The invention relates to the technical field of compression testing, in particular to a motorcycle helmet and a compression testing device thereof. Background Art

[0002] A helmet is a piece of equipment used to protect the head. It is a hat worn by soldiers during training and combat. It is an indispensable tool for people to travel. In order to ensure that the helmet can safely and effectively protect the user, it is necessary to conduct sampling compression resistance testing on it.

[0003] The prior art discloses a Chinese patent with application number CN202410480218.5, a rescue helmet performance testing device with IPC classification number G01N3 / 303, which discloses an integrated test of the puncture performance, impact performance, and compression resistance of the helmet, and can also quickly switch between puncture performance, impact performance, and compression resistance tests.

[0004] However, in the prior art, when the helmet is subjected to a compression test, a single pressure is applied to the helmet, so the compression resistance of the helmet under different gravity cannot be tested. In addition, in actual use, the helmet itself will also generate a certain impact force after being hit. Therefore, if the helmet is fixed, the fixed helmet cannot move within a certain range after being hit. Summary of the invention

[0005] The object of the present invention is to provide a motorcycle helmet and a compression test device thereof to solve the problems raised in the above background technology.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A compression test device for a motorcycle helmet, the compression test device comprising a placement table for placing the helmet during compression test, the helmet comprising a shell, goggles rotatably arranged in the middle of both sides of the shell, and chin straps arranged on both sides of the lower part of the shell;

[0008] Fixed units are correspondingly arranged on both sides of the upper end surface of the placing table, a base is arranged under the placing table, a first motor is fixedly installed in the middle of the upper end surface of the base, an outer cylinder is fixedly installed at the output end of the first motor, a cross groove is opened in the middle of the outer cylinder, a cross plate is slidably installed in the cross groove, a spring arranged in the outer cylinder is arranged under the cross plate, a connecting column is fixedly installed on the upper end surface of the cross plate, one end of the connecting column away from the cross plate is fixedly connected to the placing table, a falling unit is arranged on one side of the rear end of the base, and a knocking unit corresponding to the falling unit is arranged on the other side of the rear end of the base.

[0009] The fixing unit includes a four-corner plate rotatably connected to the placement table through an electric slider. In the middle of the upper end face of the four-corner plate, an electric push rod is fixedly installed, and a suction cup is fixedly installed at the top end of the electric push rod. A plurality of adjusting grooves are circumferentially provided on the outer side of the four-corner plate and are opened on the placement table. An L-shaped plate is slidably installed in the adjusting groove. Rotating plates corresponding to the plurality of L-shaped plates one by one are rotatably installed around the upper end face of the four-corner plate. One end of the rotating plate away from the four-corner plate is rotatably connected to the L-shaped plate. On the upper end face of the L-shaped plate, a vertical plate is fixedly installed on the side away from the rotating plate, and a rubber arc plate is fixedly installed at one end of the vertical plate.

[0010] The falling unit includes a horizontal groove opened on the base. A hanging plate is slidably installed in the horizontal groove through an electric slider. Below the horizontal groove, a lower groove is opened on the base. A stabilizing frame is slidably installed in the lower groove. One side of the stabilizing frame is fixedly connected to the hanging plate and supports and strengthens it. A connecting frame is fixedly installed on one side of the stabilizing frame. A long plate is fixedly installed at the lower part of the connecting frame. On both sides of the middle of the upper end face of the long plate, support frames are fixedly installed. A cross shaft is fixedly installed between the two support frames. A turning plate is rotatably installed outside the cross shaft. Below the two support frames, a central groove is opened on the long plate. A moving block is slidably installed in the central groove through an electric slider. A connecting plate is jointly hinged between the top of the moving block and the middle of one side of the turning plate.

[0011] A telescopic plate is fixedly installed at the top of the support frame. A runner is rotatably installed between the two telescopic plates. A steel wire rope is wound around the runner. Symmetrically arranged side plates are fixedly installed on both sides of the long plate. T-shaped grooves are opened on the sides of the two side plates away from each other. A sliding frame is slidably installed in the T-shaped groove. Telescopic rods are fixedly installed on both sides of the long plate. The telescopic ends of the telescopic rods are fixedly connected to the sliding frame. A guiding frame is fixedly installed on one side of the sliding frame.

[0012] A guide rod is provided on the guiding frame and penetrates and slides through the guiding frame. A falling frame is fixedly installed at the lower ends of the two guide rods. One end of the steel wire rope is fixedly connected to the top of the falling frame, and the other end of the steel wire rope is fixedly connected to the turning plate. Jitter grooves are opened on both sides of the falling frame. Side shafts are provided in the jitter grooves. Side plates are fixedly installed on the sides of the two side shafts close to each other. Rectangular blocks are fixedly installed on the sides of the two side shafts away from each other. A contact roller is fixedly installed between the two side plates. A pressure sensor is provided on the contact roller. Above the contact roller, a weight box fixedly connected to the two side plates is provided. A plurality of detachably installed gravity blocks are provided in the weight box.

[0013] The knocking unit includes a vertical groove opened on the base. An upper plate is slidably installed in the vertical groove through an electric slider. A driving wheel is rotatably installed in the middle of one side of the upper plate through a motor. A lower plate is fixedly installed below the upper plate. A steering frame is rotatably installed in the middle of one side of the lower plate. A steering wheel is fixedly installed in the middle of the steering frame. The steering wheel is located below the driving wheel and meshes with the driving wheel. A U-shaped frame is fixedly installed on the lower end face of the steering frame.

[0014] On the middle parts of both sides of the U-shaped frame, symmetrically arranged arc-shaped plates are provided. An arc-shaped groove is opened in the middle of the arc-shaped plate. Side shafts are slidably installed in the arc-shaped grooves on both sides. A central frame is fixedly installed between the side shafts on both sides. Electric sliders are rotatably installed at the lower parts of both sides of the U-shaped frame, and an adjusting plate is rotatably installed. A through groove is opened in the upper part of the adjusting plate. The through groove is located outside the side shaft and sleeved on it.

[0015] A second motor is fixedly installed in the middle of one side of the central frame. A rotating rod is fixedly installed at the output end of the second motor. The end of the rotating rod away from the second motor is rotatably connected to the inner cavity side wall of the central frame. Cam wheels are fixedly installed on both sides of the rotating rod. The orientations of the cam wheels on both sides are arranged in the opposite direction. Side grooves are opened on both sides of the inner cavity of the central frame. A lifting plate is slidably installed in the side groove. A spring is fixedly installed between the lower end surface of the lifting plate and the inner cavity of the side groove.

[0016] A semi-circular plate is fixedly installed on the upper end surface of the lifting plate. The semi-circular plate always contacts the corresponding cam wheel above it. A pressing rod fixedly connected to the lifting plate is arranged below the semi-circular plate. A cross bar fixedly connected to the central frame is arranged below the rotating rod. Reset wheels are rotatably installed on the outer parts of both sides of the cross bar. The reset wheels are connected to the cross bar through torsion springs. An extension plate is fixedly installed on one side of the reset wheel. A knocking nail is fixedly installed at the lower part of the side of the extension plate away from the reset wheel.

[0017] A T-shaped plate sliding in the adjusting groove is arranged on the side of the L-shaped plate away from the four-corner plate. A spring fixedly connected to the T-shaped plate is arranged in the adjusting groove. A supporting block is fixedly installed on the upper end surface of the T-shaped plate. The supporting block consists of two parts. One part supports and places the shell during the helmet test, and the other part with an arc-shaped hypotenuse restricts the outside of the shell.

[0018] The beneficial effects of the present invention:

[0019] 1. The present invention adsorbs the top of the inner cavity of the shell through the suction cup. Then the electric slider is turned on to drive the four-corner plate to rotate. When the four-corner plate rotates, it drives multiple L-shaped plates to move away from each other through multiple push-pull plates. At this time, the vertical plates on the L-shaped plates move synchronously until the rubber arc plates on the multiple vertical plates contact the inner cavity side wall of the shell. By internally fixing the placed helmet, it is avoided that the helmet loosens during the compressive test of the helmet, thereby affecting the compressive detection.

[0020] 2. The present invention opens the telescopic rod to drive the slide to slide so that the contact roller is located directly above the helmet, and then the electric slider opens to drive the moving block to slide in the central groove. At this time, the connecting plate pulls the flip plate to flip it on the horizontal axis. When the flip plate flips, one end of the steel rope connected to the flip plate is lifted upward. At this time, a circle of steel rope wrapped around the rotating wheel begins to slide. At this time, the end of the steel rope connected to the landing gear drives the landing gear to fall. At this time, the guide rod slides along the guide frame, and finally the landing gear drives the contact roller downward to knock down the helmet. Since a pressure sensor is provided on the contact roller, the pressure sensor can monitor the pressure when the contact roller is knocked down, so that the data of the helmet compression test is more accurate.

[0021] 3. The present invention can make the contact roller repeatedly fall up and down and hit the helmet when the contact roller falls to simulate the falling of the helmet through the arrangement of the shaking groove, the spring, the side shaft and the rectangular block, thereby making the simulation effect more realistic. At the same time, since the spring is arranged in the outer cylinder, when the helmet on the placement table is hit by gravity, the placement table is also driven up and down by the action of the spring, thereby realistically simulating the impact force generated by the helmet itself during use. Due to the principle of gravity acceleration, by adding a gravity block to the weight box, the force generated by the contact roller when falling at the same height is greater. Compared with the prior art, the present invention can quickly perform pressure resistance tests on helmets under different pressures when performing pressure tests.

[0022] 4. The present invention drives the rotating rod to rotate when the second motor is turned on, and the rotating rod drives the cams on both sides to rotate synchronously when the rotating rod rotates. Since the two cams are in opposite directions, the two cams rotate and cooperate with each other to squeeze the corresponding semicircular plates below. At this time, the pressing rods under the two lifting plates on both sides cooperate with each other to alternately press the corresponding extension plates, so that the knocking nails on both sides cooperate with each other to perform a knock test on the helmet.

[0023] 5. The present invention starts the motor to drive the driving wheel to rotate, and the driving wheel engages with the steering wheel to drive the mold frame to rotate left and right. At the same time, the electric slider is turned on to drive the adjustment plate to rotate. When the adjustment plate rotates, it drives the side shaft to slide in the arc groove in an annular direction, so that the knocking nails can perform multi-directional knocking tests on the helmet, making its test surface more extensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 It is a schematic diagram on the left side of the overall structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the overall right side structure of the present invention;

[0027] Figure 3 It is a schematic diagram of the front structure of the falling unit of the present invention;

[0028] Figure 4 It is a schematic diagram of the rear structure of the falling unit of the present invention;

[0029] Figure 5 It is a schematic diagram of the front cross-section structure of the falling unit of the present invention;

[0030] Figure 6 It is a schematic diagram of the structure of the knocking unit of the present invention;

[0031] Figure 7 It is a schematic diagram of the structure of the center frame of the present invention;

[0032] Figure 8 It is a schematic diagram of the structure between the placement table and the base of the present invention;

[0033] Fig. 9 The present invention Figure 7 A schematic diagram of the enlarged structure of part B;

[0034] Fig.10 The present invention Figure 8 Schematic diagram of the enlarged structure of part A.

[0035] The reference numerals in the figures are as follows:

[0036] 1. Housing; 10. Goggles; 11. Hat band; 2. Base; 3. Placing table; 31. First motor; 32. Outer cylinder; 33. Cross groove; 34. Cross plate; 35. Connecting column; 4. Fixing unit; 41. Four-corner plate; 42. Electric push rod; 43. Suction cup; 44. Adjusting groove; 45. L-shaped plate; 46. Push-pull plate; 47. Vertical plate; 48. Rubber arc plate; 49. T-shaped plate; 490. Support block; 5. Falling unit; 51. Horizontal groove; 52. Hanging plate; 520. Lower slot; 521. Stabilizing frame; 53. Connecting frame; 54. Long plate; 541. Support frame; 542. Horizontal axis; 543. Flipping plate; 544. Central groove; 545. Moving block; 546. Connecting plate; 547. Telescopic plate; 548. Runner; 549. Steel wire rope; 55. Side plate; 551. T-shaped groove; 552. Sliding frame; 553. Telescopic rod; 554. Guide frame; 56. Guide rod; 57. Falling frame; 571. Jitter groove; 572. Side axis; 573. Side plate; 574. Rectangular block; 58. Contact roller; 59. Weight box; 590. Gravity block; 6. Knocking unit; 61. Vertical groove; 62. Upper plate; 620. Driving wheel; 621. Lower plate; 622. Direction-adjusting frame; 623. Direction-adjusting wheel; 63. C-shaped frame; 631. Arc plate; 632. Arc groove; 633. Side axis; 634. Adjusting plate; 64. Central frame; 641. Second motor; 642. Rotating rod; 643. Cam; 65. Side groove; 651. Lifting plate; 652. Semi-circular plate; 653. Pressing rod; 66. Cross bar; 67. Reset wheel; 68. Extension plate; 69. Knocking nail. Detailed implementation manner

[0037] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0038] An anti-pressure test device for a motorcycle helmet is used to detect the anti-pressure performance of the helmet. The pressure sensor used in the present invention for detecting the anti-pressure of the helmet belongs to a kind of mechanical sensor.

[0039] As Figure 1-Figure 10 shown, the anti-pressure detection device includes a placing table 3 for placing the helmet during anti-pressure detection. The helmet includes a housing 1, goggles 10 rotatably arranged in the middle of both sides of the housing 1, and a hat band 11 arranged on both sides of the lower part of the housing 1;

[0040] Fixed units 4 are correspondingly arranged on both sides of the upper end surface of the placing table 3, and a base 2 is arranged under the placing table 3. A first motor 31 is fixedly installed in the middle of the upper end surface of the base 2, and an outer cylinder 32 is fixedly installed at the output end of the first motor 31. A cross groove 33 is opened in the middle of the outer cylinder 32, and a cross plate 34 is slidably installed in the cross groove 33. A spring arranged in the outer cylinder 32 is arranged under the cross plate 34, and a connecting column 35 is fixedly installed on the upper end surface of the cross plate 34. One end of the connecting column 35 away from the cross plate 34 is fixedly connected to the placing table 3. A falling unit 5 is arranged on one side of the rear portion of the base 2, and a knocking unit 6 corresponding to the falling unit 5 is arranged on the other side of the rear portion of the base 2.

[0041] The first motor 31 is turned on to drive the outer cylinder 32 to rotate, and when the outer cylinder 32 rotates, the placement table 3 is driven to rotate (the placement table 3 rotates one hundred and eighty degrees each time), thereby accurately rotating the helmet under the falling unit 5 to under the knocking unit 6.

[0042] The fixing unit 4 includes a four-corner plate 41 rotatably connected to the placement table 3 through an electric slider, an electric push rod 42 is fixedly installed in the middle of the upper end surface of the four-corner plate 41, and a suction cup 43 is fixedly installed on the top of the electric push rod 42. A plurality of adjustment grooves 44 opened on the placement table 3 are circumferentially arranged on the outer side of the four-corner plate 41, and an L-shaped plate 45 is slidably installed in the adjustment groove 44. Push-pull plates 46 corresponding to the plurality of L-shaped plates 45 are rotatably installed around the upper end surface of the four-corner plate 41. The push-pull plate 46 is rotatably connected to the L-shaped plate 45 at one end away from the four-corner plate 41, and a vertical plate 47 is fixedly installed on the side of the upper end surface of the L-shaped plate 45 away from the push-pull plate 46. One end of the vertical plate 47 is fixedly fixed A rubber arc plate 48 is fixedly installed. Before the pressure resistance test of the helmet is carried out, the shell 1 is placed on the top of the electric push rod 42 at the center of the circle on the placement table 3, and the top of the inner cavity of the shell 1 is adsorbed by the suction cup 43. Then the electric slider is opened to drive the four corner plates 41 to rotate. When the four corner plates 41 rotate, multiple push-pull plates 46 are used to rotate and drive multiple L-shaped plates 45 to move away. At this time, the vertical plates 47 on the L-shaped plates 45 move synchronously until the rubber arc plates 48 on the multiple vertical plates 47 contact the side wall of the inner cavity of the shell 1. By fixing the placed helmet internally, the helmet is prevented from loosening during the pressure resistance test and affecting the pressure resistance test.

[0043] The falling unit 5 includes a transverse groove 51 provided on the base 2, in which a hanging plate 52 is slidably installed through an electric slider, a lower groove 520 provided on the base 2 is provided below the transverse groove 51, in which a stabilizing frame 521 is slidably installed, one side of the stabilizing frame 521 is fixedly connected to the hanging plate 52 and supports and reinforces it, one side of the stabilizing frame 521 is fixedly installed with a connecting frame 53, a long plate 54 is fixedly installed at the lower part of the connecting frame 53, supporting frames 541 are fixedly installed on both sides of the middle part of the upper end surface of the long plate 54, a transverse axis 542 is fixedly installed between the supporting frames 541 on both sides, a flip plate 543 is rotatably installed outside the transverse axis 542, a central groove 544 provided on the long plate 54 is provided below between the two supporting frames 541, a moving block 545 is slidably installed in the central groove 544 through an electric slider, and a connecting plate 546 is hingedly connected to the top of the moving block 545 and the middle part of one side of the flip plate 543.

[0044] A telescopic plate 547 is fixedly installed on the top of the support frame 541, and a rotating wheel 548 is installed between the two telescopic plates 547 for common rotation. A steel rope 549 is wound around the rotating wheel 548. Symmetrically arranged side plates 55 are fixedly installed on both sides of the long board 54. T-slots 551 are provided on the sides of the two side plates 55 that are away from each other, and a slide 552 is slidably installed in the T-slot 551. Telescopic rods 553 are fixedly installed on both sides of the long board 54. The telescopic ends of the telescopic rods 553 are fixedly connected to the slide 552, and a guide frame 554 is fixedly installed on one side of the slide 552.

[0045] A guide rod 56 is provided on the guide frame 554 which passes through and slides on the guide frame 554. A landing frame 57 is fixedly installed on the lower ends of the two guide rods 56. One end of a steel rope 549 is fixedly connected to the top of the landing frame 57, and the other end of the steel rope 549 is fixedly connected to the flip plate 543. Shaking grooves 571 are provided on both sides of the landing frame 57. Side shafts 572 are provided in the shaking grooves 571. Side plates 573 are fixedly installed on the sides where the side shafts 572 on both sides are close to each other, and rectangular blocks 574 are fixedly installed on the sides where the two side shafts 572 are far away from each other. A contact roller 58 is fixedly installed between the side plates 573 on both sides, and a pressure sensor is provided on the contact roller 58. A weight box 59 fixedly connected to the side plates 573 on both sides is provided above the contact roller 58, and a plurality of detachable gravity blocks 590 are provided in the weight box 59.

[0046] When simulating the fall of a heavy object to knock down the helmet, the telescopic rod 553 is activated to drive the carriage 552 to slide, so that the contact roller 58 is located directly above the helmet. Subsequently, the electric slider is activated to drive the moving block 545 to slide in the central groove 544. At this time, the connecting plate 546 pulls the flipping plate 543 to flip on the transverse axis 542. When the flipping plate 543 flips, one end of the steel cable 549 connected to the flipping plate 543 is lifted upward. At this time, the steel cable 549 wound around the rotating wheel 548 starts to slide. At this time, the steel cable 549 at one end connected to the falling frame 57 drives the falling frame 57 to fall. At this time, the guide rod 56 slides along the guide frame 554. Finally, the falling frame 57 drives the contact roller 58 to knock down the helmet downward. Since the contact roller 58 is provided with a pressure sensor, the pressure sensor can monitor the pressure when the contact roller 58 knocks down, making the data more accurate during the anti-pressure test of the helmet. By setting the jitter groove 571, spring, side shaft 572, and rectangular block 574, when the contact roller 58 falls to simulate hitting the helmet, the contact roller 58 will also repeatedly fall and hit up and down, making the simulation effect more real. At the same time, since a spring is provided inside the outer cylinder 32, when the helmet on the placement table 3 is knocked by gravity, the placement table 3 is also driven to impact up and down under the action of the spring, thus truly simulating the impact force generated by the helmet itself during use. Due to the principle of gravitational acceleration, by adding gravity blocks 590 to the weight box 59, the greater the force generated when the contact roller 58 falls at the same height. Compared with the prior art, the present invention can quickly perform anti-pressure tests on the helmet under different pressures during the pressure test of the helmet.

[0047] The knocking unit 6 includes a vertical groove 61 opened on the base 2. An upper plate 62 is slidably installed in the vertical groove 61 through an electric slider. A driving wheel 620 is rotatably installed in the middle of one side of the upper plate 62 through a motor. A lower plate 621 is fixedly installed below the upper plate 62. A steering frame 622 is rotatably installed in the middle of one side of the lower plate 621. A steering wheel 623 is fixedly installed in the middle of the steering frame 622. The steering wheel 623 is located below the driving wheel 620 and meshes with the driving wheel 620. A U-shaped frame 63 is fixedly installed on the lower end surface of the steering frame 622.

[0048] Symmetrically arranged arc-shaped plates 631 are provided in the middle of both sides of the U-shaped frame 63. An arc-shaped groove 632 is opened in the middle of the arc-shaped plate 631. Side shafts 633 are slidably installed in the arc-shaped grooves 632 on both sides. A central frame 64 is fixedly installed between the side shafts 633 on both sides. Electric sliders are used to rotatably install adjusting plates 634 at the lower parts of both sides of the U-shaped frame 63. A through groove is opened in the upper part of the adjusting plate 634. The through groove is located outside the side shaft 633 and sleeves it.

[0049] A second motor 641 is fixedly installed in the middle of one side of the center frame 64, and a rotating rod 642 is fixedly installed at the output end of the second motor 641. The end of the rotating rod 642 away from the second motor 641 is rotatably connected to the side wall of the inner cavity of the center frame 64, and cams 643 are fixedly installed on both sides of the rotating rod 642. The directions of the cams 643 on both sides are opposite. Side grooves 65 are opened on both sides of the inner cavity of the center frame 64, and a lifting plate 651 is slidably installed in the side groove 65. The lower end surface of the lifting plate 651 and the inner cavity of the side groove 65 are fixedly installed with a spring.

[0050] A semicircular plate 652 is fixedly installed on the upper end surface of the lifting plate 651, and the semicircular plate 652 is always in contact with the corresponding cam 643 above it. A pressing rod 653 fixedly connected to the lifting plate 651 is provided below the semicircular plate 652, and a cross bar 66 fixedly connected to the center frame 64 is provided below the rotating rod 642. Reset wheels 67 are rotatably installed on the outside of both sides of the cross bar 66. The reset wheel 67 is connected to the cross bar 66 through a torsion spring, and an extension plate 68 is fixedly installed on one side of the reset wheel 67. A knocking nail 69 is fixedly installed on the lower part of the extension plate 68 away from the reset wheel 67.

[0051] When the helmet completes the gravity drop test, the first motor 31 is turned on to drive the outer cylinder 32 to rotate for replacement. At this time, the helmet is located below the knocking unit 6. When the helmet is subjected to a sharp object knocking test, the electric slider is turned on to make the upper plate 62 slide down in the vertical slot 61, and then the second motor 641 is turned on. When the second motor 641 is turned on, it drives the rotating rod 642 to rotate. When the rotating rod 642 rotates, it simultaneously drives the cams 643 on both sides to rotate. Since the two cams 643 face opposite directions, the two cams 643 rotate to cooperate with each other to squeeze the corresponding semicircular plate 652 below. At this time, the two lifting plates 651 on both sides The pressing rods 653 at the bottom cooperate with each other to alternately press the corresponding extension plates 68, so that the knocking pins 69 on both sides cooperate with each other to perform knocking tests on the helmet. When the knocking tests are performed on different angles of the helmet, the motor is turned on to drive the driving wheel 620 to rotate. The driving wheel 620 engages with the steering wheel 623 to drive the mold frame 63 to rotate left and right. At the same time, the electric slider is turned on to drive the adjustment plate 634 to rotate. When the adjustment plate 634 rotates, it drives the side shaft 633 to slide in a circular direction in the arc groove 632, thereby making the knocking pins 69 perform multi-directional knocking tests on the helmet, making its test surface more extensive.

[0052] A T-shaped plate 49 sliding in the adjustment groove 44 is provided on the side of the L-shaped plate 45 away from the four-corner plate 41. A spring fixedly connected to the T-shaped plate 49 is provided in the adjustment groove 44. A support block 490 is fixedly installed on the upper end surface of the T-shaped plate 49. The support block 490 consists of two parts, one part is used to support the shell 1 during the helmet test, and the other part has an arc-shaped beveled edge to limit the outside of the shell 1. The setting of the support block 490 can support and fix the lower edge of the helmet. At the same time, the beveled edge of the support block 490 is also convenient for limiting the outside of the helmet, further enhancing the stability of the helmet during the pressure resistance test.

[0053] When the present invention is in use, the shell 1 is placed on the top of the electric push rod 42 at the center of the circle on the placement table 3, and the top of the inner cavity of the shell 1 is adsorbed by the suction cup 43. Then the electric slider is opened to drive the four corner plates 41 to rotate. When the four corner plates 41 rotate, the multiple push-pull plates 46 rotate to drive the multiple L-shaped plates 45 to move away from each other. At this time, the vertical plates 47 on the L-shaped plates 45 move synchronously until the rubber arc plates 48 on the multiple vertical plates 47 contact the side wall of the inner cavity of the shell 1. By internally fixing the placed helmet, the helmet is prevented from loosening during the pressure test and affecting the pressure test. The setting of the support block 490 can support and fix the lower edge of the helmet. At the same time, the bevel of the support block 490 is also convenient for limiting the outside of the helmet, further enhancing the stability of the helmet during the pressure test.

[0054] Before the compression test of the helmet, the shell 1 is placed on the top of the electric push rod 42 at the center of the circle on the placement table 3, and the top of the inner cavity of the shell 1 is adsorbed by the suction cup 43. Then the electric slider is opened to drive the four corner plates 41 to rotate. When the four corner plates 41 rotate, the multiple push-pull plates 46 rotate to drive the multiple L-shaped plates 45 to move away from each other. At this time, the vertical plates 47 on the L-shaped plates 45 move synchronously until the rubber arc plates 48 on the multiple vertical plates 47 contact the side wall of the inner cavity of the shell 1. By fixing the placed helmet internally, it is prevented that the helmet is loosened during the compression test and thus affects the compression test;

[0055] When simulating a gravity object falling and knocking down the helmet, the telescopic rod 553 is opened to drive the slide frame 552 to slide so that the contact roller 58 is located directly above the helmet, and then the electric slider is opened to drive the moving block 545 to slide in the central groove 544. At this time, the connecting plate 546 pulls the flip plate 543 to flip it on the horizontal axis 542. When the flip plate 543 flips, one end of the steel rope 549 connected to the flip plate 543 is lifted upward. At this time, a circle of steel rope 549 wrapped around the rotating wheel 548 begins to slide. At this time, the steel rope 549 at one end connected to the landing gear 57 drives the landing gear 57 to fall. At this time, the guide rod 56 slides along the guide frame 554. Finally, the landing gear 57 drives the contact roller 58 downward to knock down the helmet. Since a pressure sensor is provided on the contact roller 58, the pressure sensor adopts PT124G-116. The pressure sensor can monitor the pressure when the contact roller 58 is knocked down, so that the data of the helmet compression test is more accurate.

[0056] By setting the shaking groove 571, the spring, the side shaft 572, and the rectangular block 574, when the contact roller 58 falls to simulate the falling of the helmet, the contact roller 58 will also repeatedly fall up and down, thereby making the simulation effect more realistic. At the same time, since the outer cylinder 32 is provided with a spring, when the helmet on the placement table 3 is hit by gravity, the placement table 3 is also driven to impact up and down under the action of the spring, thereby truly simulating the impact force generated by the helmet itself during use. Due to the principle of gravity acceleration, by adding a gravity block 590 to the weight box 59, the force generated by the contact roller 58 when falling at the same height is greater. Compared with the prior art, the present invention can quickly perform pressure resistance tests on helmets under different pressures when performing pressure tests.

[0057] The first motor 31 is turned on to drive the outer cylinder 32 to rotate, and the outer cylinder 32 drives the placement table 3 to rotate (the placement table 3 rotates 180 degrees each time), thereby accurately rotating the helmet under the falling unit 5 to the bottom of the knocking unit 6;

[0058] When the helmet is subjected to a sharp object knocking test, the electric slider is opened to make the upper plate 62 slide down in the vertical slot 61, and then the second motor 641 is turned on. When the second motor 641 is turned on, it drives the rotating rod 642 to rotate. When the rotating rod 642 rotates, it simultaneously drives the cams 643 on both sides to rotate. Since the two cams 643 face opposite directions, the two cams 643 rotate to cooperate with each other to squeeze the corresponding semicircular plates 652 below. At this time, the pressing rods 653 under the two lifting plates 651 on both sides cooperate with each other to alternately press the corresponding extension rods. Plate 68, so that the knocking nails 69 on both sides cooperate with each other to perform knocking test on the helmet. When the knocking test is performed on different angles of the helmet, the motor is turned on to drive the driving wheel 620 to rotate, and the driving wheel 620 engages with the steering wheel 623 to drive the mold frame 63 to rotate left and right. At the same time, the electric slider is turned on to drive the adjustment plate 634 to rotate. When the adjustment plate 634 rotates, it drives the side shaft 633 to slide in the arc groove 632 in an annular direction, thereby making the knocking nails 69 perform multi-directional knocking tests on the helmet, making its test surface more extensive.

[0059] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A compression test device for a motorcycle helmet, the helmet comprising a shell (1), goggles (10) rotatably arranged in the middle of both sides of the shell (1), and chin straps (11) arranged on both sides of the lower part of the shell (1), characterized in that: The compression resistance testing device comprises a placement table (3) for placing the helmet when performing compression resistance testing; The upper end surface of the placing platform (3) is provided with fixing units (4) correspondingly on both sides, a base (2) is provided below the placing platform (3), a first motor (31) is fixedly installed in the middle of the upper end surface of the base (2), an outer cylinder (32) is fixedly installed at the output end of the first motor (31), a cross groove (33) is provided in the middle of the outer cylinder (32), a cross plate (34) is slidably installed in the cross groove (33), a spring arranged in the outer cylinder (32) is provided below the cross plate (34), a connecting column (35) is fixedly installed on the upper end surface of the cross plate (34), and one end of the connecting column (35) away from the cross plate (34) is fixedly connected to the placing platform (3), a falling unit (5) is provided on one side of the rear part of the base (2), and a knocking unit (6) corresponding to the falling unit (5) is provided on the other side of the rear part of the base (2).

2. A compression test device for a motorcycle helmet according to claim 1, characterized in that: The fixing unit (4) comprises a four-corner plate (41) rotatably connected to the placement platform (3) via an electric slider, an electric push rod (42) is fixedly installed in the middle of the upper end surface of the four-corner plate (41), a suction cup (43) is fixedly installed at the top end of the electric push rod (42), a plurality of adjustment grooves (44) arranged on the placement platform (3) are circumferentially arranged on the outer side of the four-corner plate (41), an L-shaped plate (45) is slidably installed in the adjustment groove (44), push-pull plates (46) corresponding to the plurality of L-shaped plates (45) are rotatably installed around the upper end surface of the four-corner plate (41), one end of the push-pull plate (46) away from the four-corner plate (41) is rotatably connected to the L-shaped plate (45), a vertical plate (47) is fixedly installed on the side of the upper end surface of the L-shaped plate (45) away from the push-pull plate (46), and a rubber arc plate (48) is fixedly installed at one end of the vertical plate (47).

3. A compression test device for a motorcycle helmet according to claim 1, characterized in that: The falling unit (5) comprises a transverse groove (51) provided on the base (2), a hanging plate (52) being slidably installed in the transverse groove (51) via an electric slider, a lower groove (520) provided on the base (2) being provided below the transverse groove (51), a stabilizing frame (521) being slidably installed in the lower groove (520), one side of the stabilizing frame (521) being fixedly connected to the hanging plate (52) and supporting and reinforcing the hanging plate, a connecting frame (53) being fixedly installed on one side of the stabilizing frame (521), a long plate (54) being fixedly installed at the lower part of the connecting frame (53), and the long plate (54) being fixedly installed at the lower part of the long plate (54). Support frames (541) are fixedly installed on both sides of the middle part of the upper end surface of the plate (54), a horizontal axis (542) is fixedly installed between the support frames (541) on both sides, and a flip plate (543) is rotatably installed outside the horizontal axis (542). A central groove (544) opened on the long plate (54) is provided below between the two support frames (541), a moving block (545) is slidably installed in the central groove (544) through an electric slider, and a connecting plate (546) is hingedly connected between the top of the moving block (545) and the middle part of one side of the flip plate (543).

4. A compression test device for a motorcycle helmet according to claim 3, characterized in that: At the top of the support frame (541), a telescopic plate (547) is fixedly installed. A runner (548) is rotatably installed between the two telescopic plates (547). A steel cable (549) is wound around the runner (548). On both sides of the long plate (54), side plates (55) arranged symmetrically are fixedly installed. T-shaped grooves (551) are formed on the sides of the two side plates (55) away from each other. A sliding frame (552) is slidably installed in the T-shaped grooves (551). Telescopic rods (553) are fixedly installed on both sides of the long plate (54). The telescopic ends of the telescopic rods (553) are fixedly connected to the sliding frame (552). A guiding frame (554) is fixedly installed on one side of the sliding frame (552).

5. A compression test device for a motorcycle helmet according to claim 4, characterized in that: A guide rod (56) passing through and sliding in the guiding frame (554) is provided on the guiding frame (554). A falling frame (57) is fixedly installed at the lower ends of the two guide rods (56). One end of the steel cable (549) is fixedly connected to the top of the falling frame (57). The other end of the steel cable (549) is fixedly connected to the flipping plate (543). Jitter grooves (571) are formed on both sides of the falling frame (57). Side shafts (572) are arranged in the jitter grooves (571). Side plates (573) are fixedly installed on the sides of the two side shafts (572) close to each other. Rectangular blocks (574) are fixedly installed on the sides of the two side shafts (572) away from each other. A contact roller (58) is fixedly installed between the two side plates (573). A pressure sensor is arranged on the contact roller (58). Above the contact roller (58), a weight box (59) fixedly connected to the two side plates (573) is provided. A plurality of detachably installed gravity blocks (590) are arranged in the weight box (59).

6. The compression test device for a motorcycle helmet according to claim 1, characterized in that: The knocking unit (6) includes a vertical groove (61) formed in the base (2). An upper plate (62) is slidably installed in the vertical groove (61) through an electric slider. A driving wheel (620) is rotatably installed in the middle of one side of the upper plate (62) through a motor. A lower plate (621) is fixedly installed below the upper plate (62). A steering frame (622) is rotatably installed in the middle of one side of the lower plate (621). A steering wheel (623) is fixedly installed in the middle of the steering frame (622). The steering wheel (623) is located below the driving wheel (620) and meshes with the driving wheel (620). A U-shaped frame (63) is fixedly installed on the lower end surface of the steering frame (622).

7. A compression test device for a motorcycle helmet according to claim 6, characterized in that: Arc-shaped plates (631) arranged symmetrically are provided in the middle of both sides of the U-shaped frame (63). Arc-shaped grooves (632) are formed in the middle of the arc-shaped plates (631). Side shafts (633) are slidably installed in the two arc-shaped grooves (632). A central frame (64) is fixedly installed between the two side shafts (633). Electric sliders are used to rotatably install adjusting plates (634) at the lower parts of both sides of the U-shaped frame (63). Through grooves are formed in the upper parts of the adjusting plates (634). The through grooves are located outside the side shafts (633) and sleeved thereon.

8. A compression test device for a motorcycle helmet according to claim 7, characterized in that: A second motor (641) is fixedly mounted in the middle of one side of the center frame (64); a rotating rod (642) is fixedly mounted on the output end of the second motor (641); one end of the rotating rod (642) away from the second motor (641) is rotatably connected to the side wall of the inner cavity of the center frame (64); cams (643) are fixedly mounted on both sides of the rotating rod (642); the cams (643) on both sides are arranged in opposite directions; side grooves (65) are opened on both sides of the inner cavity of the center frame (64); a lifting plate (651) is slidably mounted in the side groove (65); a spring is fixedly mounted on the lower end surface of the lifting plate (651) and the inner cavity of the side groove (65).

9. A compression test device for a motorcycle helmet according to claim 8, characterized in that: A semicircular plate (652) is fixedly mounted on the upper end surface of the lifting plate (651), and the semicircular plate (652) is always in contact with the corresponding cam (643) above it. A pressing rod (653) fixedly connected to the lifting plate (651) is provided below the semicircular plate (652). A cross bar (66) fixedly connected to the center frame (64) is provided below the rotating rod (642). Reset wheels (67) are rotatably mounted on the outside of both sides of the cross bar (66), and the reset wheel (67) is connected to the cross bar (66) through a torsion spring. An extension plate (68) is fixedly mounted on one side of the reset wheel (67), and a knocking nail (69) is fixedly mounted on the lower part of the extension plate (68) away from the reset wheel (67).

10. The compression test device for a motorcycle helmet according to claim 2, characterized in that: A T-shaped plate (49) is provided on one side of the L-shaped plate (45) away from the four-corner plate (41) and is slidable in the adjustment groove (44). A spring fixedly connected to the T-shaped plate (49) is provided in the adjustment groove (44). A support block (490) is fixedly mounted on the upper end surface of the T-shaped plate (49). The support block (490) consists of two parts, one part is used to support the shell (1) during the helmet test, and the other part has an arc-shaped bevel edge to limit the outside of the shell (1).

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