Helmet strength testing device

Abstract

The present invention relates to the field of pressure detection, specifically a helmet strength detection device, comprising a tension mechanism, which is used to detect the tension on both sides of the helmet; a limiting mechanism, which is used to fix and limit the helmet; a No. 1 extrusion mechanism, which is used to detect the pressure on both sides of the helmet; a No. 2 extrusion mechanism, which is used to detect the pressure on the top of the helmet; the tension mechanism is fixedly installed on the top of the limiting mechanism. The helmet strength detection device, by extending the electric push rod, causes the sliding threaded cylinder to move downward along the embedded rail. At this time, the limiting hook rod will move downward from the space through which the helmet chin strap passes through the hollow, and squeeze and pull the helmet chin strap, thereby detecting the connection performance of the helmet chin strap and whether its own material is up to standard, and at the same time, it also fixes the helmet and makes preliminary preparations for subsequent pressure and tension detection.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure detection, in particular to a helmet strength detection device. Background Art

[0002] People need to wear helmets to protect their heads and avoid accidents when riding on the road, working on construction sites, or participating in sports competitions. Helmets absorb most of the impact force through the deformation of the outer shell to prevent damage to the head. Helmets are tested before leaving the factory, and usually a detection device is used to perform puncture tests on the helmets.

[0003] There are several problems with existing helmet strength testing devices: 1. Existing equipment can only use a single pressure method to test the helmet, such as only performing compression testing on the top of the helmet or only on the two sides of the helmet. First, the data is not comprehensive, and second, the testing strength is greatly reduced; 2. In addition, the friction force on the top of the helmet is very small. Therefore, when the equipment with insufficient compression force or unstable hydraulic rod is used to perform compression testing on the helmet, the pressure head will slip and deviate. Summary of the Invention

[0004] The present invention provides a helmet strength detection device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a helmet strength detection device, comprising a tension mechanism, the tension mechanism being used to detect tension on both sides of the helmet;

[0006] A limiting mechanism, which is used to fix and limit the helmet;

[0007] A first squeezing mechanism, which is used to detect pressure on both sides of the helmet;

[0008] A second squeezing mechanism, which is used to detect the pressure on the top of the helmet;

[0009] The tension mechanism is fixedly mounted on the top of the limiting mechanism, the second extrusion mechanism is fixedly mounted on the outside of the tension mechanism, and the first extrusion mechanism is fixedly mounted on the outside of the limiting mechanism;

[0010] The No. 1 extrusion mechanism includes an external rail, a screw is rotatably installed inside the external rail, the outer end of the screw is inserted into the outer side of the external rail, and is connected to a servo motor through a coupling, the servo motor is fixedly installed on the outer side of the external rail, the outer side of the screw is threadedly connected to a sliding frame, and the sliding frame is fixedly connected to a trapezoidal block on the side away from the servo motor.

[0011] Preferably, the tension mechanism includes a placement table, both ends of the placement table are symmetrically connected with test plates, the inside of the test plate and the placement table are both inserted with interlaced folding plates, the end of the test plate away from the placement table is fixedly connected to a reset spring, the end of the reset spring away from the test plate is fixedly connected to the interlaced folding plate, and the bottom of the interlaced folding plate is fixedly connected to a tension bar.

[0012] Preferably, a reset telescopic rod is fixedly installed inside the test plate, and a compensation plate is fixedly connected to the end of the reset telescopic rod away from the test plate. The end of the compensation plate away from the reset telescopic rod is embedded and flush with the inner end of the test plate, and the end of the compensation plate close to the reset telescopic rod is extruded and adapted with a U-shaped push plate, and the U-shaped push plate is inserted into the end face of the test plate and extends into the interior thereof.

[0013] Preferably, the limiting mechanism includes a bottom cylinder, which is fixedly connected to the center position of the bottom of the placing table, and the inner side of the bottom cylinder is fixedly connected to an embedded rail, and the internal sliding adapter of the embedded rail is equipped with a sliding threaded cylinder, and the bottom of the sliding threaded cylinder is fixedly connected to the tension bar, and the top of the inner cavity of the embedded rail is fixedly connected to an electric push rod, and the bottom of the electric push rod is fixedly connected to the sliding threaded cylinder.

[0014] Preferably, a limiting hook rod is inserted into the outer side of the sliding threaded cylinder, and blocks are fixedly connected to the upper and lower sides of the limiting hook rod, and a spring is fixedly connected to the outer side of the block. The end of the spring away from the block is fixedly connected to the inner side of the sliding threaded cylinder, and the inner end of the limiting hook rod is extruded and adapted with a top cone threaded rod, and the top cone threaded rod is threadedly connected to the inside of the sliding threaded cylinder, and the bottom of the top cone threaded rod is fixedly connected to a manual turning rod.

[0015] Preferably, an elastic telescopic rod is fixedly installed on the outer side of the bottom cylinder, and one end of the elastic telescopic rod inside the bottom cylinder is fixedly connected to the second magnet, the bottom of the bottom cylinder is fixedly connected to a support plate, the bottom of the support plate is fixedly connected to a bottom connecting platform, the outer side of the bottom connecting platform is fixedly connected to a cross plate, the top of the cross plate is fixedly connected to the bottom of the external rail, both ends of the cross plate are symmetrically connected to support plates, and the top of the support plate is fixedly connected to the bottom of the placement platform.

[0016] Preferably, the outer side of the top cone threaded rod is extruded and adapted with a bearing, the outer side of the bearing is fixedly connected with an outer plate, the side of the outer plate away from the bearing is provided with a through hole, the top of the outer plate is fixedly connected with a support plate, the outer side of the support plate is fixedly connected with a No. 1 magnet.

[0017] Preferably, the No. 2 extrusion mechanism includes an extension plate, which is fixedly connected to the outside of the placement table, and the top of the extension plate is fixedly connected to the No. 1 hydraulic rod, and the top of the No. 1 hydraulic rod is fixedly connected to the frame plate, and the top of the frame plate is fixedly connected to the No. 2 hydraulic rod, and the top of the No. 2 hydraulic rod is fixedly connected to the pressure head, and the pressure head is inserted into the surface of the frame plate and extends to the outside.

[0018] Preferably, the bottom of the frame plate is fixedly connected to a double-headed rod, the bottom of the double-headed rod is fixedly connected to a bottom disc, the bottom of the bottom disc is fixedly connected to a bottom connecting rail, the internal sliding adapter of the bottom connecting rail is equipped with a slip ring, and the bottom of the slip ring is fixedly connected to a telescopic ring plate.

[0019] Preferably, the inner side of the slip ring is fixedly connected with an embedded block, the top of the embedded block is extruded and adapted with a branch rod, the branch rod is inserted into the top of the bottom disc and extends to the outside, the bottom of the branch part of the branch rod is fixedly connected with an inserted vertical rod, the bottom of the inserted vertical rod is fixedly connected with a lap rod, and the end of the lap rod away from the inserted vertical rod is fixedly connected to the outside of the telescopic ring plate.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. By extending the electric push rod, the sliding threaded cylinder will move downward along the embedded rail. At this time, the limit hook rod will move downward from the space through which the helmet chin strap passes, and squeeze and pull the helmet chin strap, thereby testing the connection performance of the helmet chin strap and whether its own material is up to standard. At the same time, it also fixes the helmet and prepares for subsequent pressure and tension testing.

[0022] 2. The angle between the tension bar and the interlaced folding plate is acute when in a taut state, so the interlaced folding plate can only extend outward a little bit. At this time, the end of the interlaced folding plate at the center of the placement table will move outward, thereby playing the role of outward stable tension detection of the helmet endoskeleton arranged above it.

[0023] 3. The sliding frame connected to the outside of the screw by a thread will move the trapezoidal block toward the test plate and squeeze it. The squeezed test plate will move toward the center of the placement table, thereby performing stable pressure testing on both sides of the helmet.

[0024] 4. The helmet is wrapped by the telescopic ring plate to prevent the pressure head from being offset due to the smoothness of the helmet during the pressure application process. At the same time, when the helmet breaks, some debris will fly out and cause damage to the operator. The pressure head will be covered in the space enclosed by the telescopic ring plate, and then the No. 2 hydraulic rod will be activated to make the pressure head move downward to perform stable pressure detection on the top of the helmet. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The figure is a schematic diagram of the external structure of a helmet strength detection device of the present invention.

[0026] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the present invention.

[0027] Figure 3 It is a structural schematic diagram of the tension mechanism of the present invention.

[0028] Figure 4 It is a schematic diagram of the transverse cross-sectional structure of the tension mechanism of the present invention.

[0029] Figure 5 For the present invention Figure 4 Schematic diagram of the enlarged structure at point A in the middle.

[0030] Figure 6 It is a schematic diagram of the full cross-section structure of the limiting mechanism of the present invention.

[0031] Figure 7 It is an enlarged cross-sectional structural diagram of some components of the limiting mechanism of the present invention.

[0032] Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure at point B in the middle.

[0033] Figure 9 For the present invention Figure 7 Schematic diagram of the enlarged structure at point C in the middle.

[0034] Figure 10 For the present invention Figure 7 Schematic diagram of the enlarged structure at point D in the middle.

[0035] Figure 11 This is a structural diagram of the No. 1 extrusion mechanism of the present invention.

[0036] Figure 12 This is a structural diagram of the No. 2 extrusion mechanism of the present invention.

[0037] Figure 13 This is a schematic diagram of the full cross-section structure of the No. 2 extrusion mechanism of the present invention.

[0038] Figure 14 For the present invention Figure 13 Schematic diagram of the enlarged structure at E in the middle.

[0039] In the figure: 1. Tension mechanism; 2. Limit mechanism; 3. Extrusion mechanism No. 1; 4. Extrusion mechanism No. 2; 11. Placement table; 12. Test plate; 13. Interlaced folding plate; 14. Return spring; 15. Tension bar; 16. Reset telescopic rod; 17. Compensation plate; 18. U-shaped push plate; 21. Bottom cylinder; 22. Embedded rail; 23. Sliding threaded cylinder; 24. Electric push rod; 25. Limit hook rod; 26. Block; 27. Spring; 28. Top cone threaded rod; 29. Manual turning rod; 20. Support plate; 201. Bottom connection table; 202. Cross plate; 203. Support plate; 20 4. Bearing; 205. External plate; 206. Perforation; 207. Support plate; 208. Magnet No. 1; 209. Elastic telescopic rod; 200. Magnet No. 2; 31. External rail; 32. Screw; 33. Servo motor; 34. Sliding frame; 35. Trapezoidal block; 41. Extension plate; 42. Hydraulic rod No. 1; 43. Frame plate; 44. Hydraulic rod No. 2; 45. Pressure head; 46. Double-headed rod; 47. Bottom disc; 48. Bottom rail; 49. Slip ring; 40. Inline block; 401. Branch rod; 402. Interlaced vertical rod; 403. Lap rod; 404. Telescopic ring plate. DETAILED DESCRIPTION

[0040] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. It should be noted that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0041] See also Figures 1 to 14 , the present invention provides a technical solution: Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, it includes a tension mechanism 1, which is used to detect the tension on both sides of the helmet;

[0042] A limiting mechanism 2, which is used to fix and limit the helmet;

[0043] A first squeezing mechanism 3, which is used to detect the pressure on both sides of the helmet;

[0044] A second squeezing mechanism 4, which is used to detect the pressure on the top of the helmet;

[0045] The tension mechanism 1 is fixedly mounted on the top of the limiting mechanism 2 , the second extrusion mechanism 4 is fixedly mounted on the outside of the tension mechanism 1 , and the first extrusion mechanism 3 is fixedly mounted on the outside of the limiting mechanism 2 .

[0046] The tension mechanism 1 includes a placement table 11, and test plates 12 are symmetrically inserted at both ends of the placement table 11. Interlaced folding plates 13 are inserted inside the test plate 12 and the placement table 11. The end of the test plate 12 away from the placement table 11 is fixedly connected to a return spring 14, and the end of the return spring 14 away from the test plate 12 is fixedly connected to the interlaced folding plate 13. The bottom of the interlaced folding plate 13 is fixedly connected to a tension bar 15. A reset telescopic rod 16 is fixedly installed inside the test plate 12, and the end of the reset telescopic rod 16 away from the test plate 12 is fixedly connected to a compensation plate 17. The end of the compensation plate 17 away from the reset telescopic rod 16 is embedded in the inner end of the test plate 12 and is flush. The compensation plate 17 is close to the end of the reset telescopic rod 16 and is extruded with a U-shaped push plate 18. The U-shaped push plate 18 is inserted into the end face of the test plate 12 and extends into the interior thereof.

[0047] like Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 and Figure 11As shown, the limiting mechanism 2 includes a bottom cylinder 21, which is fixedly connected to the center position of the bottom of the placement table 11, and the inner side of the bottom cylinder 21 is fixedly connected with an embedded rail 22, and the inner sliding adapter of the embedded rail 22 is equipped with a sliding threaded cylinder 23, and the bottom of the sliding threaded cylinder 23 is fixedly connected to the tension bar 15, and the top of the inner cavity of the embedded rail 22 is fixedly connected with an electric push rod 24, and the bottom of the electric push rod 24 is fixedly connected to the sliding threaded cylinder 23, and the outer side of the sliding threaded cylinder 23 is connected with a limiting hook rod 25, and then the electric push rod 24 is started to move the limiting hook rod 25 to the hollow part of the helmet chin strap. In this step, the tension bar 15 fixedly connected to the bottom of the sliding threaded cylinder 23 will move upward and change from a loose state to a tight state. At this time, the fixed connection The interlaced folded plate 13 connected to the other end of the tension bar 15 will move slightly outward. Because the angle between the tension bar 15 and the interlaced folded plate 13 is an acute angle when the tension bar 15 is in the taut state, the interlaced folded plate 13 can only extend outward a little bit. At this time, the end of the interlaced folded plate 13 at the center of the placement table 11 will move outward, thereby playing a role in outward stable tension detection of the helmet endostem set above it. As the sliding threaded cylinder 23 moves downward and the limiting hook rod 25 pulls the helmet chin strap, the tension bar 15 fixedly connected to its bottom will move downward and return to a loose state from a tight state. Then, under the reset force of the reset spring 14, the interlaced folded plate 13 will move toward the center of the placement table 11 and return to its original state. The upper and lower sides of the limit hook rod 25 are fixedly connected with blocks 26, and the outer side of the block 26 is fixedly connected with a spring 27. The end of the spring 27 away from the block 26 is fixedly connected to the inner side of the sliding threaded cylinder 23. The inner end of the limit hook rod 25 is squeezed and adapted with a top cone threaded rod 28, and the top cone threaded rod 28 is threadedly connected to the inside of the sliding threaded cylinder 23. The bottom of the top cone threaded rod 28 is fixedly connected with a manual turning rod 29. By placing the helmet on the center of the top of the placement table 11 and then starting the electric push rod 24, the sliding threaded cylinder 23 connected to its telescopic end will move upward along the embedded rail 22, and the limit hook rod 25 inserted on the outer side of the sliding threaded cylinder 23 will move upward together. When the limit hook rod 25 moves to the head When the helmet chin strap is in the hollow part, the operator rotates the manual rotating rod 29 forward, and then the top cone threaded rod 28 connected to the top of the manual rotating rod 29 will move upward along the inner wall of the sliding threaded cylinder 23 until the top of the top cone threaded rod 28 squeezes the inner end of the limiting hook rod 25 outward, wherein the contact surface between the top cone threaded rod 28 and the limiting hook rod 25 is a curved surface, and then the limiting hook rod 25 will stretch the spring 27 and extend outward from the sliding threaded cylinder 23, wherein the spring 27 plays a role in resetting the limiting hook rod 25. At this time, the extended part of the limiting hook rod 25 will pass through the hollow part of the helmet chin strap, and then the electric push rod 24 will be extended, so that the sliding threaded cylinder 23 will move downward along the embedded rail 22.At this time, the limit hook rod 25 will move downward from the space where the helmet chin strap passes through the hollow, and squeeze and pull the helmet chin strap, thereby testing the connection performance of the helmet chin strap and whether its own material is up to standard. At the same time, it also fixes the helmet and prepares for subsequent pressure and tension testing.

[0048] An elastic telescopic rod 209 is fixedly installed on the outside of the bottom cylinder 21, and one end of the elastic telescopic rod 209 inside the bottom cylinder 21 is fixedly connected to the second magnet 200, and the bottom of the bottom cylinder 21 is fixedly connected to the support plate 20, and the bottom of the support plate 20 is fixedly connected to the bottom of the bottom connecting platform 201, and the outside of the bottom connecting platform 201 is fixedly connected to the cross plate 202, and the top of the cross plate 202 is fixedly connected to the bottom of the external rail 31, and the two ends of the cross plate 202 are symmetrically connected to the support plate 203, and the top of the support plate 203 is fixedly connected to the bottom of the placement table 11, and the outer side of the top cone threaded rod 28 is extruded and adapted with a bearing 204, and the outer side of the bearing 204 is fixedly connected to an outer plate 205, and a through hole 206 is provided on the side of the outer plate 205 away from the bearing 204, and the top of the outer plate 205 is fixed It is fixedly connected with a support plate 207, and the outer side of the support plate 207 is fixedly connected to the No. 1 magnet 208. In addition, as the sliding threaded cylinder 23 moves downward and the limiting hook rod 25 pulls the chin strap of the helmet, the top cone threaded rod 28 will move downward accordingly. However, the outer side of the top cone threaded rod 28 is connected to the outer plate 205 through the bearing 204. Therefore, when the through hole 206 opened on the outer side of the outer plate 205 moves downward to a position level with the elastic telescopic rod 209, the No. 2 magnet 200 fixedly connected to the inner end of the elastic telescopic rod 209 will generate an attractive force between the No. 1 magnet 208, and then the elastic telescopic rod 209 will pass through the through hole 206, thereby limiting the outer plate 205, stopping the pulling of the helmet and limiting and fixing it.

[0049] The extrusion mechanism No. 1 3 includes an external rail 31, and a screw rod 32 is rotatably installed inside the external rail 31. The outer end of the screw rod 32 is inserted into the outer side of the external rail 31 and is connected to a servo motor 33 through a coupling. The servo motor 33 is fixedly installed on the outer side of the external rail 31, and the outer side of the screw rod 32 is threadedly connected to a sliding frame 34. The side of the sliding frame 34 away from the servo motor 33 is fixedly connected to a trapezoidal block 35. Then, the servo motor 33 is started, so that the screw rod 32 connected to its output end through the coupling will rotate forward, and the sliding frame 34 threadedly connected to the outer side of the screw rod 32 will move the trapezoidal block 35 toward the test plate 12 and extrude it, and the extruded test plate 12 will move toward the center of the placement table 11, thereby playing a role in stable pressure detection on both sides of the helmet.

[0050] like Figure 12 、 Figure 13 and Figure 14 As shown, the No. 2 extrusion mechanism 4 includes an extension plate 41, which is fixedly connected to the outside of the placement table 11. The top of the extension plate 41 is fixedly connected to the No. 1 hydraulic rod 42, the top of the No. 1 hydraulic rod 42 is fixedly connected to the frame plate 43, the top of the frame plate 43 is fixedly connected to the No. 2 hydraulic rod 44, the top of the No. 2 hydraulic rod 44 is fixedly connected to the pressure head 45, the pressure head 45 is inserted into the surface of the frame plate 43 and extends to the outside, the bottom of the frame plate 43 is fixedly connected to the double-headed rod 46, the bottom of the double-headed rod 46 is fixedly connected to the bottom disc 47, the bottom of the bottom disc 47 is fixedly connected to the bottom rail 48, the internal sliding adapter of the bottom rail 48 is equipped with a slip ring 49, the bottom of the slip ring 49 is fixedly connected to the telescopic ring plate 404, the slip ring The inner side of 49 is fixedly connected with an embedded block 40, and the top of the embedded block 40 is squeezed and adapted to be fitted with a branch rod 401, which is inserted into the top of the bottom disc 47 and extends to the outside. The bottom of the branch part of the branch rod 401 is fixedly connected with an inserted vertical rod 402, and the bottom of the inserted vertical rod 402 is fixedly connected with a lap rod 403. One end of the lap rod 403 away from the inserted vertical rod 402 is fixedly connected to the outside of the telescopic ring plate 404. By starting the No. 1 hydraulic rod 42, the frame plate 43 connected to its output end will respectively move downward with the pressure head 45 and the double-headed rod 46, and the bottom end of the double-headed rod 46 is connected to the bottom disc 47, so the bottom disc 47 will move downward until the bottom of the pressure head 45 hits the top At the top of the helmet, the branch rod 401 is driven downward by an external driving device. At this time, the main rod in the branch rod 401 will move downward and squeeze the embedded block 40, wherein the contact surfaces between the main rod in the branch rod 401 and the embedded block 40 are both inclined surfaces, so the embedded block 40 will move outward along the bottom rail 48 with the slip ring 49 fixedly connected to the other end thereof. At the same time, the branch rod in the branch rod 401 will move downward together with the interlaced vertical rod 402, and the bottom end of the interlaced vertical rod 402 is connected to the lap rod 403, and the other end of the lap rod 403 is connected to the telescopic ring plate 404, wherein the telescopic ring plate 404 is telescopic, and its telescopic bottom part is It is tough and connected to the connecting rod 403. In summary, through the downward extension of the telescopic ring plate 404 and the outward movement of the slip ring 49, there is always a distance point at which the bottom end of the telescopic ring plate 404 will squeeze and wrap the top of the helmet, thereby playing a role in wrapping the part of the helmet that requires pressure detection in a range, avoiding the pressure head 45 from being offset due to the smoothness of the helmet during the pressure application process, and also playing a role in preventing some debris from splashing out and causing damage to the operator when the helmet breaks. The pressure head 45 will be covered in the space enclosed by the telescopic ring plate 404, and then the No. 2 hydraulic rod 44 will be started, so that the pressure head 45 will move downward to perform stable pressure detection on the top of the helmet.

[0051] When the helmet is in use, first, the helmet is placed on the center part of the top of the placing platform 11, and then the electric push rod 24 is started, so that the sliding threaded cylinder 23 connected to its telescopic end will move upward, and the limiting hook rod 25 inserted on the outer side of the sliding threaded cylinder 23 will move upward together. When the limiting hook rod 25 moves to the position of the hollow part of the helmet chin strap, the manual rotating rod 29 is manually rotated forward, and then the top cone threaded rod 28 connected to the top end of the manual rotating rod 29 will spirally move upward along the inner wall of the sliding threaded cylinder 23 until the top end of the top cone threaded rod 28 squeezes the inner end of the limiting hook rod 25 outward, and then the limiting hook rod 25 will stretch the spring 27 and extend outward from the sliding threaded cylinder 23. At this time, the protruding part of the limiting hook rod 25 will pass through the hollow part of the helmet chin strap, and then the electric push rod 24 is extended again, so that the sliding threaded cylinder 23 will move downward along the embedded rail 22. At this time, the limiting hook rod 25 will move downward from the space through which the helmet chin strap passes, and squeeze and pull the helmet chin strap. In addition, as the sliding threaded cylinder 23 moves downward, the top cone threaded rod 28 will move downward accordingly. However, the outer side of the top cone threaded rod 28 is connected to the outer plate 205 through the bearing 204. Therefore, when the through hole 206 opened on the outer side of the outer plate 205 moves downward to a position level with the elastic telescopic rod 209, the second magnet 200 fixedly connected to the inner end of the elastic telescopic rod 209 will generate an attractive force between the first magnet 208, and then the elastic telescopic rod 209 will pass through the through hole 206 and limit the outer plate 205.

[0052] When the electric push rod 24 is activated again, the limit hook rod 25 moves to the hollow of the helmet chin strap. The tension bar 15 fixedly connected to the bottom of the sliding threaded barrel 23 will move upward and change from a loose state to a tight state. At this time, the interleaved folded plate 13 fixedly connected to the other end of the tension bar 15 will move slightly outward. At this time, the end of the interleaved folded plate 13 located at the center of the placement platform 11 will perform an outward tension test on the inner bone of the helmet. As the sliding threaded barrel 23 moves downward, the tension bar 15 fixedly connected to its bottom will move downward and return from a tight state to a loose state. Then, under the restoring force of the return spring 14, the interleaved folded plate 13 will move toward the center of the placement platform 11 and return to its original position.

[0053] Next, the servo motor 33 is activated, causing the screw 32, connected to its output end via a coupling, to rotate forward. The sliding frame 34, threaded onto the outside of the screw 32, moves the trapezoidal block 35 toward the test plate 12, compressing it. The compressed test plate 12 then moves toward the center of the placement table 11, until both sides of the helmet are under stable pressure testing. Finally, by activating the No. 1 hydraulic rod 42, the frame 43 connected to its output end moves downward, carrying the pressure head 45, until the bottom of the pressure head 45 performs a stable pressure test on the top of the helmet.

[0054] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Various changes made by ordinary technicians in this field based on the above concepts without creative work fall within the scope of protection of the present invention.

Claims

1. A helmet strength detection device, characterized in that: include: A tension mechanism (1), the tension mechanism (1) is used to detect the tension on both sides of the helmet; A limiting mechanism (2), the limiting mechanism (2) is used for fixing and limiting the helmet; A first squeezing mechanism (3), the first squeezing mechanism (3) is used to detect the pressure on both sides of the helmet; A second squeezing mechanism (4), the second squeezing mechanism (4) is used to detect the pressure on the top of the helmet; The tension mechanism (1) is fixedly mounted on the top of the limiting mechanism (2), the second extrusion mechanism (4) is fixedly mounted on the outside of the tension mechanism (1), and the first extrusion mechanism (3) is fixedly mounted on the outside of the limiting mechanism (2); The first extrusion mechanism (3) includes an external rail (31), a screw rod (32) is rotatably installed inside the external rail (31), the outer end of the screw rod (32) is inserted into the outer side of the external rail (31), and is connected to a servo motor (33) through a coupling, the servo motor (33) is fixedly installed on the outer side of the external rail (31), the outer side of the screw rod (32) is threadedly connected to a sliding frame (34), and the side of the sliding frame (34) away from the servo motor (33) is fixedly connected to a trapezoidal block (35); The tension mechanism (1) comprises a placement table (11), both ends of the placement table (11) are symmetrically plugged with test plates (12), the interiors of the test plates (12) and the placement table (11) are plugged with interleaved folding plates (13), one end of the test plate (12) away from the placement table (11) is fixedly connected to a return spring (14), one end of the return spring (14) away from the test plate (12) is fixedly connected to the interleaved folding plate (13), and the bottom of the interleaved folding plate (13) is fixedly connected to a tension bar (15); The limiting mechanism (2) includes a bottom cylinder (21), the bottom cylinder (21) is fixedly connected to the center position of the bottom of the placement table (11), the inner side of the bottom cylinder (21) is fixedly connected to an embedded rail (22), the inner sliding adapter of the embedded rail (22) is equipped with a sliding threaded cylinder (23), the bottom of the sliding threaded cylinder (23) is fixedly connected to the tension bar (15), the top of the inner cavity of the embedded rail (22) is fixedly connected to an electric push rod (24), and the bottom of the electric push rod (24) is fixedly connected to the sliding threaded cylinder (23); The outer side of the sliding threaded cylinder (23) is plugged with a limit hook rod (25), and the upper and lower sides of the limit hook rod (25) are fixedly connected with blocks (26). The outer side of the block (26) is fixedly connected with a spring (27), and one end of the spring (27) away from the block (26) is fixedly connected to the inner side of the sliding threaded cylinder (23). The inner end of the limit hook rod (25) is extruded and adapted with a top cone threaded rod (28), and the top cone threaded rod (28) is threadedly connected to the inside of the sliding threaded cylinder (23). The bottom of the top cone threaded rod (28) is fixedly connected with a manual turning rod (29); The second extrusion mechanism (4) includes an extension plate (41), the extension plate (41) is fixedly connected to the outside of the placement table (11), the top of the extension plate (41) is fixedly connected to the first hydraulic rod (42), the top of the first hydraulic rod (42) is fixedly connected to the frame plate (43), the top of the frame plate (43) is fixedly connected to the second hydraulic rod (44), the top of the second hydraulic rod (44) is fixedly connected to the pressure head (45), and the pressure head (45) is inserted into the surface of the frame plate (43) and extends to the outside.

2. A helmet strength testing device according to claim 1, characterized in that: A reset telescopic rod (16) is fixedly installed inside the test plate (12), and the end of the reset telescopic rod (16) away from the test plate (12) is fixedly connected to a compensation plate (17), and the end of the compensation plate (17) away from the reset telescopic rod (16) is embedded with and flush with the inner end of the test plate (12), and the end of the compensation plate (17) close to the reset telescopic rod (16) is squeezed and adapted with a U-shaped push plate (18), and the U-shaped push plate (18) is inserted into the end surface of the test plate (12) and extends into the interior thereof.

3. The helmet strength testing device according to claim 1, characterized in that: An elastic telescopic rod (209) is fixedly installed on the outer side of the bottom cylinder (21), and one end of the elastic telescopic rod (209) inside the bottom cylinder (21) is fixedly connected to a second magnet (200). The bottom of the bottom cylinder (21) is fixedly connected to a support plate (20), and the bottom of the support plate (20) is fixedly connected to a bottom connecting platform (201). The outer side of the bottom connecting platform (201) is fixedly connected to a cross plate (202), and the top of the cross plate (202) is fixedly connected to the bottom of the external rail (31). Both ends of the cross plate (202) are symmetrically connected to support plates (203), and the top of the support plate (203) is fixedly connected to the bottom of the placement platform (11).

4. The helmet strength testing device according to claim 1, characterized in that: A bearing (204) is extruded and adapted on the outer side of the top cone threaded rod (28); an outer plate (205) is fixedly connected to the outer side of the bearing (204); a through hole (206) is provided on the side of the outer plate (205) away from the bearing (204); a support plate (207) is fixedly connected to the top of the outer plate (205); and a first magnet (208) is fixedly connected to the outer side of the support plate (207).

5. The helmet strength testing device according to claim 1, characterized in that: The bottom of the frame plate (43) is fixedly connected to a double-headed rod (46), the bottom of the double-headed rod (46) is fixedly connected to a bottom disc (47), the bottom of the bottom disc (47) is fixedly connected to a bottom connecting rail (48), the interior of the bottom connecting rail (48) is adapted to slide with a slip ring (49), and the bottom of the slip ring (49) is fixedly connected to a telescopic ring plate (404).

6. The helmet strength testing device according to claim 5, characterized in that: The inner side of the slip ring (49) is fixedly connected to an embedded block (40), the top of the embedded block (40) is extruded and adapted to be fitted with a branch rod (401), the branch rod (401) is inserted into the top of the bottom disc (47) and extends to the outside, the bottom of the branch portion of the branch rod (401) is fixedly connected to an inserted vertical rod (402), the bottom of the inserted vertical rod (402) is fixedly connected to a lap rod (403), and one end of the lap rod (403) away from the inserted vertical rod (402) is fixedly connected to the outside of the telescopic ring plate (404).

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