Helmet strength detection device

Abstract

The invention relates to the field of pressure detection, in particular to a helmet strength detection device which comprises a tension mechanism used for detecting tension on the two sides of a helmet. The limiting mechanism is used for fixing and limiting the helmet; the first extrusion mechanism is used for detecting the pressure on the two sides of the helmet; the second extrusion mechanism is used for detecting the pressure of the top of the helmet; according to the helmet strength detection device, an electric push rod extends to enable a sliding threaded cylinder to move downwards along an embedded rail, and at the moment, a limiting hook rod moves downwards from a hollow penetrating space of a helmet jaw belt and extrudes and pulls the helmet jaw belt, so that the strength of the helmet is detected, and the strength of the helmet is detected. Therefore, the connecting performance of the jaw belt of the helmet and whether the material of the jaw belt of the helmet is qualified or not can be detected, and meanwhile, the helmet can be fixed and prepared for subsequent pressure and tension detection.

Description

Technical Field

[0001] The 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 to avoid accidents when riding on the road, working on construction sites, participating in sports competitions, etc. The helmets absorb most of the impact force through the deformation of the outer shell to resist 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 the existing helmet strength testing devices: 1. The 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 will not be comprehensive, and second, the testing strength will be greatly reduced; 2. In addition, the friction on the top of the helmet is very small, so when the equipment with insufficient squeezing force or unstable hydraulic rod is used to perform squeezing 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 object, the present invention provides the following technical solutions: a helmet strength detection device, comprising a tension mechanism, the tension mechanism is used to detect the 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 the 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] One of the extrusion mechanisms 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 a trapezoidal block is fixedly connected to the side of the sliding frame away from the servo motor.

[0011] Preferably, the tension mechanism includes a placing table, both ends of the placing table are symmetrically connected with test plates, the inside of the test plate and the placing table are both connected with interlaced folding plates, the end of the test plate away from the placing table is fixedly connected with a return spring, the end of the return 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 with 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 barrel, 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, and the end of the spring away from the block is fixedly connected to the inner side of the sliding threaded barrel, 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 barrel, and a manual turning rod is fixedly connected to the bottom of the top cone threaded 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 a No. 2 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 table.

[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, the extension plate is fixedly connected to the outside of the placement table, the top of the extension plate is fixedly connected to the No. 1 hydraulic rod, the top of the No. 1 hydraulic rod is fixedly connected to the frame plate, the top of the frame plate is fixedly connected to the No. 2 hydraulic rod, the top of the No. 2 hydraulic rod is fixedly connected to the pressure head, the pressure head is interspersed in 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, an embedded block is fixedly connected to the inner side of the slip ring, and a branch rod is extruded and adapted on the top of the embedded block. The branch rod is inserted through the top of the bottom disc and extends to the outside. An inserted vertical rod is fixedly connected to the bottom of the branch portion of the branch rod, and a lap rod is fixedly connected to the bottom of the inserted vertical rod. One 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 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.

[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 a role in performing outward stable tension detection on the inner bone of the helmet arranged above it.

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

[0024] 4. By wrapping the helmet with a telescopic ring plate, the pressure head can be prevented 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 splash out and cause damage to the operator. The pressure head will be covered in the space surrounded by the telescopic ring plate, and then the No. 2 hydraulic rod will be started to move the pressure head 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 schematic 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] Fig. 9 For the present invention Figure 7 Schematic diagram of the enlarged structure at point C in the middle.

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

[0035] Fig.11 It is a structural schematic diagram of the first extrusion mechanism of the present invention.

[0036] Fig.12 It is a structural schematic diagram of the No. 2 extrusion mechanism of the present invention.

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

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

[0039] In the figure: 1, tension mechanism; 2, limit mechanism; 3, squeeze mechanism No. 1; 4, squeeze mechanism No. 2; 11, placement table; 12, test plate; 13, interlaced folding plate; 14, reset 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 rotating 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. No. 1 magnet; 209. Elastic telescopic rod; 200. No. 2 magnet; 31. External rail; 32. Screw rod; 33. Servo motor; 34. Sliding frame; 35. Trapezoidal block; 41. Extension plate; 42. No. 1 hydraulic rod; 43. Frame plate; 44. No. 2 hydraulic rod; 45. Pressure head; 46. Double-headed rod; 47. Bottom disc; 48. Bottom rail; 49. Slip ring; 40. In-line block; 401. Branch rod; 402. Interlaced vertical rod; 403. Overlap rod; 404. Telescopic ring plate. DETAILED DESCRIPTION

[0040] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment. 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 for fixing and limiting the helmet;

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

[0044] A second squeezing mechanism 4, which is used for detecting 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, both ends of the placement table 11 are symmetrically plugged with test plates 12, the inside of the test plate 12 and the placement table 11 are plugged with interlaced folding plates 13, the end of the test plate 12 away from the placement table 11 is fixedly connected with a reset spring 14, the end of the reset 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 with a tension bar 15, the inside of the test plate 12 is fixedly installed with a reset telescopic rod 16, the end of the reset telescopic rod 16 away from the test plate 12 is fixedly connected with a compensation plate 17, the end of the compensation plate 17 away from the reset telescopic rod 16 is embedded with the inner end of the test plate 12 and is flush, 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, the U-shaped push plate 18 is inserted in the end surface of the test plate 12 and extends into the inside thereof.

[0047] like Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 and Fig.11As shown, the limiting mechanism 2 includes a bottom cylinder 21, which is fixedly connected to the center position of the bottom of the placing table 11, and an inner rail 22 is fixedly connected to the inner side of the bottom cylinder 21, and a sliding threaded cylinder 23 is adapted for internal sliding of the inner rail 22, and the bottom of the sliding threaded cylinder 23 is fixedly connected to the tension bar 15, and an electric push rod 24 is fixedly connected to the top of the inner cavity of the inner rail 22, and the bottom of the electric push rod 24 is fixedly connected to the sliding threaded cylinder 23, and a limiting hook rod 25 is inserted into the outer side of the sliding threaded cylinder 23. When the electric push rod 24 is started, the limiting hook rod 25 moves to the hollow part of the chin strap of the helmet. In this step, the tension bar 15 fixedly connected to the bottom of the sliding threaded cylinder 23 will move upward accordingly 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 in the tensioned state, so 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 inner bone arranged above it, and with the downward movement of the sliding threaded cylinder 23 and the pulling of the helmet chin strap by the limiting hook rod 25, the tension bar 15 fixedly connected to its bottom will move downward and return to a loose state from a tight state, and then under the restoring force of the restoring 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, 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, the top cone threaded rod 28 is threadedly connected to the inside of the sliding threaded cylinder 23, and the bottom of the top cone threaded rod 28 is fixedly connected with a manual turning rod 29. By placing the helmet at 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 the telescopic end thereof 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 chin strap of the helmet 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 surfaces between the top cone threaded rod 28 and the limiting hook rod 25 are both curved surfaces, 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, and at this time, the extended part of the limiting hook rod 25 will pass through the hollow part of the chin strap of the helmet, 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 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, and 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 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 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 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, and 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 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 opened 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 with a No. 1 magnet 208. In addition, as the sliding threaded tube 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 a bearing 204. Therefore, when the through hole 206 opened on the outer side of the outer plate 205 moves downward to a position flush 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 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, and 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 with the trapezoidal block 35 toward the direction of 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 Fig.12 , Fig.13 and Fig.14 As shown, the second extrusion mechanism 4 includes an extension plate 41, which is fixedly connected to the outer side of the placement table 11, and the top of the extension plate 41 is fixedly connected to the first hydraulic rod 42, and the top of the first hydraulic rod 42 is fixedly connected to the frame plate 43, and the top of the frame plate 43 is fixedly connected to the second hydraulic rod 44, and the top of the second hydraulic rod 44 is fixedly connected to the pressure head 45, and the pressure head 45 is inserted in the surface of the frame plate 43 and extends to the outside, and the bottom of the frame plate 43 is fixedly connected to the double-headed rod 46, and the bottom of the double-headed rod 46 is fixedly connected to the bottom of the bottom disc 47, and the bottom of the bottom disc 47 is fixedly connected to the bottom rail 48, and the internal sliding adapter of the bottom rail 48 is equipped with a slip ring 49, and the bottom of the slip ring 49 is fixedly connected to the telescopic ring plate 404, and 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 with a branch rod 401, which is inserted into the top of the bottom disc 47 and extends to the outside, and 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, 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, and by starting the No. 1 hydraulic rod 42, the frame plate 43 connected to the output end thereof 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 will push up At the top of the helmet, the branch rod 401 is driven downward by an external driving device, and the main rod in the branch rod 401 moves downward and squeezes 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, and at the same time, the branch rod in the branch rod 401 will move downward 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 lap 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, 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 when the helmet is broken, some debris splashes out and causes damage to the operator, wherein 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 is started, so that the pressure head 45 will move downward to perform stable pressure detection on the top of the helmet.

[0051] When the present invention is in use: first, the helmet is placed at the center of the top of the placing table 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 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, and then the limiting hook rod 25 stretches the spring 27 and extends outward from the sliding threaded cylinder 23. At this time, the extending 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, and at this time, the limiting hook rod 25 will move downward from the space through which the helmet chin strap passes through the hollow, and squeeze and pull the helmet chin strap. In addition, as the sliding threaded tube 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 started again, the limit hook rod 25 moves to the hollow part of the helmet chin strap. 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 interlaced folding plate 13 fixedly connected to the other end of the tension bar 15 will move slightly outward. At this time, the end of the interlaced folding plate 13 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 cylinder 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 reset force of the reset spring 14, the interlaced folding plate 13 will move toward the center of the placement platform 11 and return to its original position.

[0053] Then, the servo motor 33 is started, so that the screw 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 32 will move with the trapezoidal block 35 toward the test plate 12 and squeeze it, and the squeezed test plate 12 will move toward the center of the placement table 11 until the two sides of the helmet are subjected to stable pressure testing. Finally, by starting the No. 1 hydraulic rod 42, the frame plate 43 connected to its output end will move downward with 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-mentioned 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-mentioned concepts without creative work all 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) being 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) being used for detecting the pressure on both sides of the helmet; A second squeezing mechanism (4), the second squeezing mechanism (4) being used for detecting 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 a trapezoidal block (35) is fixedly connected to the side of the sliding frame (34) away from the servo motor (33).

2. A helmet strength detection device according to claim 1, characterized in that: The tension mechanism (1) comprises a placement table (11), both ends of the placement table (11) are symmetrically plugged with test plates (12), the insides of the test plate (12) and the placement table (11) are plugged with interlaced 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 interlaced folding plate (13), and the bottom of the interlaced folding plate (13) is fixedly connected to a tension bar (15).

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

4. A helmet strength detection device according to claim 1, characterized in that: The limiting mechanism (2) comprises a bottom cylinder (21), the bottom cylinder (21) is fixedly connected to the center position of the bottom of the placing 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).

5. A helmet strength detection device according to claim 4, characterized in that: A limit hook rod (25) is inserted into the outer side of the sliding threaded cylinder (23), and blocks (26) are fixedly connected to the upper and lower sides of the limit hook rod (25). A spring (27) is fixedly connected to the outer side of the block (26), 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). A top cone threaded rod (28) is extruded and adapted at the inner end of the limit hook rod (25), and the top cone threaded rod (28) is threadedly connected to the inside of the sliding threaded cylinder (23), and a manual rotating rod (29) is fixedly connected to the bottom of the top cone threaded rod (28).

6. A helmet strength testing device according to claim 4, characterized in that: An elastic telescopic rod (209) is fixedly installed on the outer side of the bottom cylinder (21); one end of the elastic telescopic rod (209) located 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); the bottom of the support plate (20) is fixedly connected to a bottom connection platform (201); the outer side of the bottom connection platform (201) is fixedly connected to a cross plate (202); 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); the top of the support plate (203) is fixedly connected to the bottom of the placement platform (11).

7. A helmet strength testing device according to claim 5, 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).

8. A helmet strength testing device according to claim 1, characterized in that: The second extrusion mechanism (4) comprises an extension plate (41), the extension plate (41) is fixedly connected to the outer side of the placement table (11), the top of the extension plate (41) is fixedly connected to a first hydraulic rod (42), the top of the first hydraulic rod (42) is fixedly connected to a frame plate (43), the top of the frame plate (43) is fixedly connected to a second hydraulic rod (44), the top of the second hydraulic rod (44) is fixedly connected to a pressure head (45), and the pressure head (45) is inserted into the surface of the frame plate (43) and extends to the outside.

9. A helmet strength detection device according to claim 8, 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 bottom of the bottom connecting rail (48) is internally slidably adapted with a slip ring (49), and the bottom of the slip ring (49) is fixedly connected to a telescopic ring plate (404).

10. A helmet strength detection device according to claim 9, characterized in that: An embedded block (40) is fixedly connected to the inner side of the slip ring (49); a branch rod (401) is extruded and adapted at the top of the embedded block (40); the branch rod (401) is inserted through the top of the bottom disc (47) and extends to the outside; an inserted vertical rod (402) is fixedly connected to the bottom of the branch portion of the branch rod (401); a lap rod (403) is fixedly connected to the bottom of the inserted vertical rod (402); an 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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