Helmet strength detection device

Abstract

The invention belongs to the technical field of helmet detection, and particularly discloses a helmet strength detection device which comprises a bottom plate, one side of the upper end of the bottom plate is connected with a supporting frame, the upper portion of one side of the supporting frame is connected with an impact assembly, and the impact assembly can fix an impact hammer and guide the impact hammer during falling. The middle of the upper end of the bottom plate is connected with a supporting table, the middle of the upper end of the supporting table is connected with an arc-shaped guide rail, the upper end of the arc-shaped guide rail is slidably connected with a sliding block, the upper end of the sliding block is connected with a fixing assembly, and the fixing assembly is convenient for fixing a helmet. Meanwhile, the impact hammer can be vertically guided, it is ensured that the impact hammer falls along a set vertical path, the impact hammer can be rapidly reset after the test is finished, and the test interval time is shortened.

Description

Technical Field

[0001] The invention belongs to the technical field of helmet detection, and particularly relates to a helmet strength detection device. Background Art

[0002] Helmet strength testing refers to a series of tests to evaluate the structural integrity and protection of the helmet when it is subjected to external force impact. Specifically, the helmet strength test includes physical performance testing and structural integrity testing. It tests whether the helmet shell, liner and other structures can remain intact during normal use and impact without cracking, deformation or parts falling off. For example, a squeeze test is performed to observe whether the helmet is damaged after being subjected to a certain pressure.

[0003] The main purpose of helmet impact testing is to ensure that the helmet can effectively protect the wearer's head when subjected to high-speed impact, reducing or avoiding the risk of head injury. In the impact test equipment of helmets or hard hats, electromagnetic blocks are usually used as a fixing device. When the impact hammer needs to be fixed at a certain height for impact testing, the electromagnetic block will work and absorb the impact hammer to ensure that it is stable and motionless. Once the test starts, the electromagnetic block will release the impact hammer, allowing it to fall freely and impact the helmet or hard hat;

[0004] When an existing impact hammer is used to perform impact testing on the surface of a helmet, a worker usually manually moves the impact hammer to the bottom of an electromagnetic block, energizes the electromagnetic block to fix the impact hammer, and when an impact occurs, the electromagnetic block is de-energized, causing the impact hammer to fall. However, the impact hammer may deviate when it falls, causing fluctuations in the test data and affecting the accuracy of the results. At the same time, the impact hammer needs to be manually fixed under the electromagnetic block by the worker. Manual operation is time-consuming and affects the test speed, which is more obvious in batch testing. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a helmet strength detection device.

[0006] To achieve the above object, the present invention provides a helmet strength detection device, comprising a bottom plate, a support frame is connected to one side of the upper end of the bottom plate, and an impact assembly is connected to the upper part of one side of the support frame;

[0007] The impact assembly can fix the impact hammer and guide the impact hammer when it falls;

[0008] A supporting platform is connected to the middle of the upper end of the bottom plate, an arc-shaped guide rail is connected to the middle of the upper end of the supporting platform, a slider is slidably connected to the upper end of the arc-shaped guide rail, and a fixing component is connected to the upper end of the slider;

[0009] The fixing assembly facilitates fixing the helmet;

[0010] The upper end of the bottom plate is connected with a protection frame, and the arc-shaped guide rail is located inside the protection frame.

[0011] In the above technical solution, further, the impact assembly includes a support plate, a connecting column is connected to the lower end of the support plate, the connecting column is connected to the electromagnetic block, the lower end of the electromagnetic block is connected to the impact hammer, and the upper end of the support plate is connected to the guide assembly.

[0012] In the above technical solution, further, the guide assembly includes a box body, a first motor is connected to one side of the upper end of the box body, a driving gear is connected to the output end of the first motor, the lower end of the driving gear extends through and extends to the lower end of the box body, and the lower end of the driving gear is meshedly connected to a gear ring.

[0013] In the above technical solution, further, the inner wall of the gear ring is connected to a ratchet ring, and a turntable is rotatably connected to the middle part of one side of the inner wall of the box body. The turntable is located inside the ratchet ring and rotates. A first pawl is rotatably connected to the upper part of one side of the turntable, and the upper end of the first pawl is meshed with one of the tooth grooves on the inner wall of the ratchet ring. A connecting rod is rotatably connected to one side of the turntable, and one end of the connecting rod is connected to one side of the first pawl.

[0014] In the above technical solution, further, the upper and lower parts of one side of the ratchet ring are connected with guide blocks, one side of the two guide blocks is slidably connected with a guide ring, a guide groove is opened on one side of the guide ring corresponding to one side of the two guide blocks, one end of the two guide blocks is located in the guide groove and slides, one end of the guide ring is connected to one side of the inner wall of the box, and the guide block and the guide ring are used to ensure the stability of the ratchet ring during rotation.

[0015] In the above technical scheme, further, one end of the turntable is connected to a connecting ratchet, the upper part of one side of the ratchet ring is connected to a rotating electromagnet, one end of the rotating electromagnet is connected to a second pawl, the lower end of the second pawl is meshed with one side of the upper end of the connecting ratchet, the middle part of one side of the connecting ratchet is connected to a rotating rod, both sides of the outer wall of the rotating rod are connected to winding rollers, the outer wall of the winding roller is wrapped with a connecting rope, the lower ends of the two connecting ropes extend through the lower end of the box body, the lower ends of the two connecting ropes are connected to connecting plates, one end of the two connecting plates is connected to splints, both sides of the two splints are connected to mounting plates, wherein the two mounting plates are connected to the other two mounting plates by connecting bolts, one side of the two splints are respectively in contact with the upper parts of both sides of the impact hammer, and the splint fixes the impact hammer by connecting bolts.

[0016] In the above technical solution, further, the fixed component includes a second motor, the output end of the second motor is connected to a rotating plate, the upper side of the rotating plate is connected to a shell, the inner wall of the shell is slidably connected to a movable plate, one end of the movable plate extends through and extends to one side of the shell, the upper side of the movable plate is connected to an L-shaped plate, the middle part of one side of the L-shaped plate is connected to a pull rod, the upper end of the shell is connected to a support plate, and the upper side of the support plate is connected to a support block.

[0017] In the above technical solution, further, fixed plates are evenly connected on both sides of the movable plate, one end of the two fixed plates respectively extend through both sides of the shell, a screw is connected to the lower part of one side of the two fixed plates, one end of the two screws extend through one side of the fixed plate, one end of the screw is connected to a stabilizing plate, and one side of the two stabilizing plates respectively contacts with both sides of the shell.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The fixing components, pull rods and stabilizing plates ensure that the helmet will not move during the test, ensuring the accuracy of the test. The design of the arc-shaped guide rail and slider allows the angle of the helmet to be flexibly adjusted. At the same time, the second motor drives the rotating plate, the fixing components and the helmet to rotate, making it easier to test different parts of the helmet and meet a variety of test requirements. The automatic adjustment function of the helmet angle reduces the workload of manual adjustment by the staff, further improving the test efficiency.

[0020] The impact hammer is vertically guided by the guide assembly, the clamping plate and the connecting rope to ensure that the impact hammer falls along the set vertical path, avoiding deviation or shaking of the impact hammer during the falling process, thereby improving the accuracy of the test. At the same time, the impact hammer is automatically reset through the winding roller and the connecting rope to reduce manual intervention. During the resetting process of the impact hammer, the guide assembly ensures that it rises smoothly along the vertical path to avoid shaking or deviation during the resetting process, so that the impact hammer can be quickly reset after the test is completed, reducing the test interval time and improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure proposed by the present invention;

[0022] Figure 2 A cross-sectional view of the protective frame proposed by the present invention;

[0023] Figure 3 This is a schematic diagram of the installation structure of the arc-shaped guide rail proposed in the present invention;

[0024] Figure 4 This is a schematic diagram of the installation structure of the slider proposed by the present invention;

[0025] Figure 5This is a schematic diagram of the installation structure of the pull rod proposed by the present invention;

[0026] Figure 6 This is a schematic diagram of the installation structure of the driving gear proposed by the present invention;

[0027] Figure 7 This is a schematic diagram of the installation structure of the turntable proposed by the present invention;

[0028] Figure 8 This is a schematic diagram of the installation structure of the splint proposed by the present invention;

[0029] Fig. 9 This is a schematic diagram of the installation structure of the first pawl proposed by the present invention;

[0030] Fig.10 The present invention proposes Figure 7 A is a schematic diagram of the enlarged structure of the middle part;

[0031] Fig.11 This is a schematic diagram of the installation structure of the second pawl proposed by the present invention.

[0032] In the figure: 1, bottom plate; 2, support frame; 3, support plate; 4, connecting column; 5, electromagnetic block; 6, impact hammer; 7, box; 8, first motor; 9, driving gear; 10, gear ring; 11, ratchet ring; 12, turntable; 13, first ratchet; 14, connecting rod; 15, turning rod; 16, winding roller; 17, connecting rope; 18, connecting plate; 19, clamping plate; 20, mounting plate; 21, connecting bolt; 2 2. Guide block; 23. Guide ring; 24. Support platform; 25. Arc guide rail; 26. Slider; 27. Second motor; 28. Rotating plate; 29. ​​Shell; 30. Moving plate; 31. Fixed plate; 32. Screw; 33. Stabilizing plate; 34. L-shaped plate; 35. Pull rod; 36. Support plate; 37. Support block; 38. Protective frame; 39. Connecting ratchet; 40. Rotating electromagnet; 41. Second ratchet. DETAILED DESCRIPTION

[0033] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] like Figure 1-Figure 11A helmet strength testing device shown in the figure comprises a bottom plate 1, a support frame 2 is connected to one side of the upper end of the bottom plate 1, an impact assembly is connected to the upper part of one side of the support frame 2, the impact assembly can fix the impact hammer 6 and guide the impact hammer 6 when it falls, a supporting platform 24 is connected to the middle part of the upper end of the bottom plate 1, an arc-shaped guide rail 25 is connected to the middle part of the upper end of the supporting platform 24, a slider 26 is slidably connected to the upper end of the arc-shaped guide rail 25, a fixing assembly is connected to the upper end of the slider 26, the fixing assembly is convenient for fixing the helmet, a protective frame 38 is connected to the upper end of the bottom plate 1, and the arc-shaped guide rail 25 is located inside the protective frame 38;

[0035] A closable protective plate is provided on one side of the protective frame 38. When the strength of the helmet needs to be tested, the protective plate on one side of the protective frame 38 is opened, and the helmet is placed on top of the fixing assembly. The helmet to be tested is fixed by the fixing assembly, and the slider 26 slides above the arc guide rail 25 to adjust the angle of the helmet, which is convenient for testing the helmet at different angles and reduces the workload of the staff for adjusting the position of the helmet. The impact assembly is used to facilitate the testing of the helmet. The protective frame 38 and the closable protective plate effectively prevent the debris or impact hammer 6 generated during the test from flying out, thereby protecting the safety of the staff.

[0036] The impact assembly includes a support plate 3, a connecting column 4 is connected to the lower end of the support plate 3, the connecting column 4 is connected to an electromagnetic block 5, an impact hammer 6 is connected to the lower end of the electromagnetic block 5, and a guide assembly is connected to the upper end of the support plate 3;

[0037] The impact hammer 6 is fixed under the electromagnetic block 5, and the electromagnetic block 5 is energized, so that the impact hammer 6 can be fixed to maintain the stability of the impact hammer 6. When the electromagnetic block 5 is powered off, the impact hammer 6 falls downward quickly. At the same time, the impact hammer 6 is fixed under the guide component. The guide component can guide the impact hammer 6 when it falls downward to ensure the stable performance of the impact hammer 6. At the same time, the guide component can pull up the impact hammer 6, so that the impact hammer 6 is fixed under the electromagnetic block 5 again, reducing the workload of the staff to manually fix the impact hammer 6, so that the helmet can be quickly impact tested multiple times, reducing the workload of the staff in manual debugging during the detection process.

[0038] The guide assembly includes a box body 7, a first motor 8 is connected to one side of the upper end of the box body 7, a driving gear 9 is connected to the output end of the first motor 8, the lower end of the driving gear 9 extends through the lower end of the box body 7, the lower end of the driving gear 9 is meshed with a gear ring 10, the inner wall of the gear ring 10 is connected to a ratchet ring 11, a turntable 12 is rotatably connected to the middle of one side of the inner wall of the box body 7, the turntable 12 is located inside the ratchet ring 11 and rotates, a first pawl 13 is rotatably connected to the upper part of one side of the turntable 12, and the upper end of the first pawl 13 is connected to the ratchet One of the tooth grooves on the inner wall of the ring 11 is meshed and connected, and a connecting rod 14 is rotatably connected to one side of the turntable 12. One end of the connecting rod 14 is connected to one side of the first pawl 13. The upper and lower parts of one side of the ratchet ring 11 are connected to guide blocks 22. One side of the two guide blocks 22 is slidably connected to a guide ring 23. One side of the guide ring 23 corresponds to one side of the two guide blocks 22. A guide groove is opened at one side of the guide ring 23 corresponding to one side of the two guide blocks 22. One end of the two guide blocks 22 slides inside the guide groove. One end of the guide ring 23 is connected to one side of the inner wall of the box body 7. The guide block 22 and the guide ring 23 are used to ensure the stability of the ratchet ring 11 during rotation. A connecting ratchet 39 is connected to one end of the turntable 12. A rotating electromagnet 40 is connected to the upper part of one side of the ratchet ring 11. A second pawl 41 is connected to one end of the rotating electromagnet 40. The lower end of the second pawl 41 is meshed with one side of the upper end of the connecting ratchet 39. A rotating rod 15 is connected to the middle part of one side of the connecting ratchet 39. Winding rollers 16 are connected to both sides of the outer wall of the rotating rod 15. A connecting rope 17 is wound around the outer wall of the winding roller 16. The lower ends of the two connecting ropes 17 extend through and extend to the lower end of the box body 7. The lower ends of the two connecting ropes 17 are connected to connecting plates 18. One end of the two connecting plates 18 is connected to clamping plates 19. Both sides of the two clamping plates 19 are connected to mounting plates 20. The two mounting plates 20 are connected to the other two mounting plates 20 by connecting bolts 21. One side of the two clamping plates 19 is in contact with the upper part of both sides of the impact hammer 6 respectively. The clamping plates 19 fix the impact hammer 6 by connecting bolts 21 to ensure the stability of the impact hammer 6 when it falls.

[0039] When the impact hammer 6 is fixed under the electromagnetic block 5, two clamping plates 19 are placed on both sides of the impact hammer 6 respectively, and the shape of the clamping plate 19 is a semi-arc structure. One side of the clamping plate 19 is connected to an anti-skid pad, and one side of the anti-skid pad contacts one side of the impact hammer 6. The multiple mounting plates 20 are fixed by two connecting bolts 21, so that the lower end of the guide assembly can be fixed to the lower side of the outer wall of the impact hammer 6. When the electromagnetic block 5 is powered off, the rotating electromagnet 40 adopts non-contact wireless energy transmission technology, and the wireless power supply control base is installed on the inner wall of the box body 7. The rotating electromagnet 40 is energized to drive the second pawl 41 to rotate, so that one end of the second pawl 41 rotates upward, and the second pawl 41 is separated from the connecting ratchet 39, and the impact hammer 6 falls downward, which can pull the connecting plates 18 and the lower ends of the connecting ropes 17 on both sides to follow the impact hammer 6 to fall downward. The falling of the connecting rope 17 can drive the two winding rollers 16 and the rotating rod 15 to rotate, and the rotation of the rotating rod 15 drives the turntable 12 to rotate clockwise. When the turntable 12 rotates clockwise, the first pawl 13 slides in the tooth groove of the ratchet ring 11. Due to the design of the first pawl 13, it will not prevent the ratchet ring 11 from rotating freely in the clockwise direction. At this time, the second pawl 41 does not contact one side of the upper end of the connecting ratchet 39, and then the connecting ratchet 39 rotates clockwise with the turntable 12. Therefore, when the impact hammer 6 falls, the ratchet ring 11 remains stationary and does not generate resistance to the fall of the impact hammer 6. After the impact hammer 6 falls freely, , hit the helmet to complete the impact test. At this time, the turntable 12 stops rotating, and the first pawl 13 stays in a tooth groove of the ratchet ring 11. The turntable 12 stops rotating, so that the connecting ratchet 39 stops rotating. At this time, the tooth groove on the upper end of the connecting ratchet 39 is just aligned with the second pawl 41, so that the second pawl 41 can smoothly enter the tooth groove above the connecting ratchet 39. The rotating electromagnet 40 is powered off, and one end of the second pawl 41 falls down and is clamped to the tooth groove on one side of the upper end of the connecting ratchet 39.

[0040] When the impact is over, the first motor 8 starts, driving the driving gear 9 to rotate, and the driving gear 9 meshes with the gear ring 10, driving the gear ring 10 and the ratchet ring 11 to rotate counterclockwise. When the ratchet ring 11 rotates counterclockwise, since one end of the second pawl 41 is inserted into the tooth groove of the connected ratchet 39, the counterclockwise rotation of the ratchet ring 11 will drive the connected ratchet 39 to rotate, thereby driving the turntable 12 to rotate together. The rotation of the connected ratchet 39 drives the rotating rod 15 and the winding roller 16 to rotate counterclockwise, and winds up the connecting rope 17. The connecting rope 17 pulls the splint 19 and the impact hammer 6 upward. When the impact hammer 6 is pulled up to the bottom of the electromagnetic block 5, the electromagnetic block 5 is energized to fix the impact hammer 6 and prepare for the next test, so as to facilitate the impact test of the helmet again and reduce the workload of the staff to manually pull up the impact hammer 6.

[0041] The fixing assembly includes a second motor 27, the output end of the second motor 27 is connected to a rotating plate 28, one side of the upper end of the rotating plate 28 is connected to a shell 29, a moving plate 30 is slidably connected to the inner wall of the shell 29, one end of the moving plate 30 extends through and extends to one side of the shell 29, one side of the upper end of the moving plate 30 is connected to an L-shaped plate 34, and the middle part of one side of the L-shaped plate 34 is connected to a pull rod 35, the upper end of the shell 29 is connected to a supporting plate 36, one side of the upper end of the supporting plate 36 is connected to a supporting block 37, both sides of the moving plate 30 are evenly connected to fixed plates 31, one end of the two fixed plates 31 extends through and extends to both sides of the shell 29 respectively, the lower part of one side of the two fixed plates 31 is connected to screw rods 32, one end of the two screw rods 32 extends through and extends to one side of the fixed plate 31, one end of the screw rods 32 is connected to a stabilizing plate 33, and one side of the two stabilizing plates 33 is in contact with both sides of the shell 29 respectively;

[0042] When the helmet is placed on the supporting block 37, the helmet straps on both sides of the helmet are connected by buckles, and the connected helmet straps are placed under the two pull rods 35. By rotating the two screws 32, the two stabilizing plates 33 are moved away from the shell 29, and then the movable plate 30 is pulled downward, so that the movable plate 30 slides on the inner wall of the shell 29, and the movable plate 30 drives the L-shaped plate 34 and the two pull rods 35 to move downward. The two pull rods 35 tighten the helmet straps downward, which can fix the helmet firmly on the supporting block 37. When the movable plate 30 moves downward to a suitable position, the two screws 32 are rotated to make the two stabilizing plates 33 contact the two sides of the shell 29 respectively, so as to fix the position of the movable plate 30 and ensure the stability of the helmet. When the second motor 27 works, it can drive the rotating plate 28 to rotate, and then drive the helmet to rotate, which is convenient for adjusting the angle position of the helmet.

[0043] Working principle: When using the device, the helmet is placed on the supporting block 37, the helmet straps on both sides are connected by buckles, and the connected helmet straps are placed under the two pull rods 35, and then the two fixing plates 31 are tightened downward, thereby driving the movable plate 30 and the two pull rods 35 to move downward, and the screws 32 and the stabilizing plate 33 on both sides fix the position of the movable plate 30, and the helmet is tightened downward by the two pull rods 35 to firmly fix the helmet on the supporting block 37 to ensure that the helmet does not move during the test. The position angle of the helmet can be adjusted by sliding the slider 26 on the arc guide rail 25. After the angle is adjusted, the position of the slider 26 is fixed to ensure that the angle of the helmet remains unchanged during the test, so that the impact test can be performed on both sides of the helmet. At the same time, the rotating plate 28 and the helmet are driven to rotate by the second motor 27, and the impact test can be performed on the front and back of the helmet, so as to facilitate the impact test on different parts of the helmet.

[0044] The impact hammer 6 is fixed under the support plate 3 through the electromagnetic block 5. When the electromagnetic block 5 is energized, a magnetic force is generated to attract the impact hammer 6 to keep it in a fixed state. The clamping plate 19 is fixed to both sides of the impact hammer 6 through the connecting bolts 21. The lower end of the connecting rope 17 is connected to the clamping plate 19, and the upper end of the connecting rope 17 is wound around the winding roller 16. When an impact test is required, the electromagnetic block 5 is powered off, and the magnetic force disappears. At the same time, the rotating electromagnet 40 is energized to drive the second pawl 41 to rotate, so that one end of the second pawl 41 rotates upward, and the second pawl 41 is separated from the connecting ratchet 39, releasing the limit on the connecting ratchet 39, and the impact hammer 6 falls freely under the action of gravity. When the impact hammer 6 falls, the connecting rope 17 is pulled, and the connecting rope 17 drives the winding roller 16 and the rotating rod 15 to rotate. The rotating rod 15 can drive the rotating disk 12 to rotate clockwise, driving the first pawl 13 to slide on the inner wall of the ratchet ring 11, and the ratchet ring 11 remains stationary, ensuring that the impact hammer 6 falls in the vertical direction to avoid deviation. After the impact hammer 6 falls freely, it hits the helmet at a set height and speed to complete the test of the helmet strength. At this time, the rotating disk 12 stops rotating, the first pawl 13 stays in a tooth groove of the ratchet ring 11, the rotating electromagnet 40 is powered off, and one end of the second pawl 41 falls and is connected to the inner tooth groove of one side of the upper end of the connecting ratchet 39;

[0045] After the impact test is completed, the first motor 8 is started, and the driving gear 9 engages with the gear ring 10, driving the gear ring 10 and the ratchet ring 11 to rotate counterclockwise. When the ratchet ring 11 rotates counterclockwise, since one end of the second pawl 41 is inserted into the tooth groove of the connected ratchet 39, the counterclockwise rotation of the ratchet ring 11 will drive the connected ratchet 39 to rotate, thereby driving the turntable 12 to rotate together. The rotation of the connected ratchet 39 drives the rotating rod 15 and the winding roller 16 to rotate counterclockwise, winding the connecting rope 17, pulling the splint 19 and the impact hammer 6 to move upward. When the impact hammer 6 is pulled up to the bottom of the electromagnetic block 5, the electromagnetic block 5 is energized to generate magnetic force to absorb the impact hammer 6 to fix it. After the impact hammer 6 is fixed, it is ready for the next impact test.

[0046] 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 only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A helmet strength testing device, comprising a base plate (1), characterized in that: One side of the upper end of the bottom plate (1) is connected to a support frame (2), and an upper portion of one side of the support frame (2) is connected to an impact assembly; The impact assembly can fix the impact hammer (6) and guide the impact hammer (6) when it falls; The middle part of the upper end of the bottom plate (1) is connected to a supporting platform (24), the middle part of the upper end of the supporting platform (24) is connected to an arc-shaped guide rail (25), the upper end of the arc-shaped guide rail (25) is slidably connected to a slider (26), and the upper end of the slider (26) is connected to a fixing component; The fixing assembly facilitates fixing the helmet; The upper end of the bottom plate (1) is connected to a protective frame (38), and the arc-shaped guide rail (25) is located inside the protective frame (38).

2. A helmet strength detection device according to claim 1, characterized in that: The impact assembly comprises a support plate (3), a connection column (4) is connected to a lower end of the support plate (3), the connection column (4) is connected to an electromagnetic block (5), an impact hammer (6) is connected to the lower end of the electromagnetic block (5), and a guide assembly is connected to an upper end of the support plate (3).

3. A helmet strength detection device according to claim 2, characterized in that: The guide assembly comprises a box body (7), a first motor (8) is connected to one side of the upper end of the box body (7), a driving gear (9) is connected to the output end of the first motor (8), the lower end of the driving gear (9) extends through and extends to the lower end of the box body (7), and the lower end of the driving gear (9) is meshingly connected to a gear ring (10).

4. A helmet strength detection device according to claim 3, characterized in that: The inner wall of the toothed ring (10) is connected to a ratchet ring (11); a rotating disk (12) is rotatably connected to the middle of one side of the inner wall of the housing (7); the rotating disk (12) is located inside the ratchet ring (11) and rotates; a first pawl (13) is rotatably connected to the upper part of one side of the rotating disk (12); the upper end of the first pawl (13) is meshed with one of the tooth grooves on the inner wall of the ratchet ring (11); a connecting rod (14) is rotatably connected to one side of the rotating disk (12); one end of the connecting rod (14) is connected to one side of the first pawl (13).

5. A helmet strength detection device according to claim 4, characterized in that: The upper and lower parts of one side of the ratchet ring (11) are both connected to guide blocks (22), one side of the two guide blocks (22) is slidably connected to a guide ring (23), one side of the guide ring (23) is provided with a guide groove corresponding to one side of the two guide blocks (22), one end of the two guide blocks (22) is located inside the guide groove for sliding, one end of the guide ring (23) is connected to one side of the inner wall of the box body (7), and the guide block (22) and the guide ring (23) are used to ensure the stability of the ratchet ring (11) during rotation.

6. A helmet strength detection device according to claim 4, characterized in that: One end of the rotating disk (12) is connected to a connecting ratchet (39), an upper portion of one side of the ratchet ring (11) is connected to a rotating electromagnet (40), one end of the rotating electromagnet (40) is connected to a second pawl (41), a lower end of the second pawl (41) is meshed with one side of an upper end of the connecting ratchet (39), a rotating rod (15) is connected to the middle portion of one side of the connecting ratchet (39), both sides of the outer wall of the rotating rod (15) are connected to winding rollers (16), the outer wall of the winding roller (16) is wound with a connecting rope (17), and the two connecting ropes (17) are connected to each other. 7) The lower end extends through the lower end of the box body (7), the lower ends of the two connecting ropes (17) are connected to a connecting plate (18), one end of the two connecting plates (18) is connected to a clamping plate (19), both sides of the two clamping plates (19) are connected to mounting plates (20), wherein the two mounting plates (20) are connected to the other two mounting plates (20) by connecting bolts (21), one side of the two clamping plates (19) is respectively in contact with the upper part of both sides of the impact hammer (6), and the clamping plate (19) fixes the impact hammer (6) by the connecting bolts (21).

7. A helmet strength detection device according to claim 1, characterized in that: The fixing assembly comprises a second motor (27), the output end of the second motor (27) is connected to a rotating plate (28), one side of the upper end of the rotating plate (28) is connected to a shell (29), the inner wall of the shell (29) is slidably connected to a moving plate (30), one end of the moving plate (30) extends through and extends to one side of the shell (29), one side of the upper end of the moving plate (30) is connected to an L-shaped plate (34), the middle part of one side of the L-shaped plate (34) is connected to a pull rod (35), the upper end of the shell (29) is connected to a supporting plate (36), and one side of the upper end of the supporting plate (36) is connected to a supporting block (37).

8. A helmet strength detection device according to claim 7, characterized in that: The two sides of the movable plate (30) are evenly connected to fixed plates (31), one end of the two fixed plates (31) respectively extends through the two sides of the shell (29), the lower part of one side of the two fixed plates (31) is connected to a screw rod (32), one end of the two screw rods (32) extends through the one side of the fixed plate (31), one end of the screw rod (32) is connected to a stabilizing plate (33), and one side of the two stabilizing plates (33) is in contact with the two sides of the shell (29).

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