Helmet quality detection device

Abstract

The utility model discloses a helmet quality detection device, and relates to the technical field of helmet quality detection. The device for detecting the quality of the helmet comprises a bottom plate, and a detection mechanism is arranged above the bottom plate: an impact assembly which is arranged above the bottom plate and is used for impacting the helmet; the supporting assembly is arranged above the bottom plate, is used for adjusting the orientation of the helmet and is matched with the impact assembly to simulate impact in different directions; the limiting assembly comprises a limiting rod fixedly installed above the supporting assembly, a connecting rod is movably installed at the top end of the limiting rod, a limiting block is fixedly installed at the top end of the connecting rod, the supporting table can form corresponding inclination angles due to different heights of all points due to the difference of the telescopic amount of the electric push rods at different positions, and the telescopic length of all the electric push rods is accurately controlled; multi-angle and multi-direction adjustment of the supporting table can be achieved, the helmet is driven to the needed angle, impact detection in different directions is completed in cooperation with the impact assembly, an actual scene is accurately simulated, and detection comprehensiveness and accuracy are improved.

Description

Technical Field

[0001] This utility model relates to the field of helmet quality technology, specifically to a helmet quality testing device. Background Technology

[0002] A helmet is a type of head protection widely used in construction, road cycling, and sports competitions. A helmet mainly consists of a shell, liner, and suspension system. The shell absorbs most of the impact force through deformation, the liner provides shock absorption, and the suspension system, located between the shell and liner, is usually adjustable to accommodate different wearers' head shapes. Because helmets are protective gear, quality inspection during the manufacturing process is essential.

[0003] A relevant reference is Chinese utility model patent CN223037339U, which discloses a helmet quality testing device, relating to the field of product quality testing equipment. It includes a base, a support rod mounted on the base, a support plate located at the end of the support rod away from the base, and a rotation adjustment mechanism, a puncture detection mechanism, an impact detection mechanism, an abrasion resistance detection mechanism, and a clamping mechanism mounted on the support plate. The rotation adjustment mechanism includes a first transmission motor and a rotating mounting plate mounted on the support plate. The transmission shaft of the first transmission motor is fixedly connected to the rotating mounting plate. The puncture detection mechanism, the impact detection mechanism, and the abrasion resistance detection mechanism are all mounted on the rotating mounting plate and arranged in a circular array. This application has the effect of simplifying the testing process and improving testing efficiency by switching between different types of detection mechanisms through the rotating mounting plate.

[0004] The aforementioned helmet quality inspection device restricts the helmet's position by clamping it with an arc-shaped structure. During use, it can only inspect the top of the helmet. Furthermore, during clamping, the helmet may be too large or too small, causing the arc-shaped structure to not fit perfectly with the helmet, thus limiting its applicability. Utility Model Content

[0005] In view of the shortcomings of the existing technology, this utility model provides a helmet quality detection device, which solves the problems of not being able to adjust the impact angle and having a limited range of applications.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A helmet quality testing device includes a base plate, and a testing mechanism is disposed above the base plate.

[0007] Impact assembly, positioned above the base plate, is used to impact the helmet;

[0008] The support component, located above the base plate, is used to adjust the helmet's orientation and works with the impact component to simulate impacts from different directions.

[0009] The limiting component includes a limiting rod fixedly installed above a support component. A connecting rod is movably installed at the top of the limiting rod, a limiting block is fixedly installed at the top of the connecting rod, a transmission rod is movably installed at the bottom of the connecting rod, a transmission frame is movably installed at the bottom of the transmission rod, and a limiting cylinder is fixedly installed below the transmission frame.

[0010] Preferably, the impact assembly includes a fixed frame fixedly installed above the base plate, an air chamber fixedly installed at the upper end of the fixed frame, a sealing ring fitted into the lower part of the air chamber, an impact pin inserted through the center of the air chamber, a rubber ring fitted into the upper end of the impact pin, and a compression cylinder fixedly installed at the top of the fixed frame.

[0011] Preferably, the bottom end of the air chamber is provided with an opening structure with a diameter smaller than the inner cavity diameter, the rubber rings are vertically and equidistantly installed on the inner wall of the opening structure at the bottom of the air chamber, the opening structure at the bottom of the air chamber is fitted with the firing pin, and the top end of the firing pin is provided with a disc-shaped protrusion structure that fits into the inner cavity of the air chamber.

[0012] Preferably, the rubber ring is fitted and installed on the outside of the protruding structure at the top of the firing pin, the rubber ring is located between the outside of the protruding structure at the top of the firing pin and the inner wall of the air chamber, the firing pin and the air chamber form a sliding connection, and the bottom end of the compression cylinder is fixedly connected to the upper surface of the central protruding structure of the firing pin.

[0013] Preferably, the support assembly includes a ball head fixedly installed above the base plate, an electric actuator fixedly installed at the upper end of the ball head, a support platform movably installed above the electric actuator, the ball head being mirror-symmetrically installed at both ends of the electric actuator, the electric actuator being movably connected to the base plate through the bottom end of the ball head, and to the support platform through the top end of the ball head.

[0014] Preferably, the connecting rod has an "L" shaped structure, with the bend hinged to the top of the limiting rod, the connecting rod and the limiting rod forming a rotatable connection, the connecting rod and the transmission rod forming a rotatable connection, the transmission rod and the transmission frame forming a rotatable connection, and the bottom end of the limiting cylinder being fixedly connected to the support platform.

[0015] Beneficial effects

[0016] This invention provides a device for detecting the quality of helmets. Compared with the prior art, it has the following advantages:

[0017] (1) The helmet quality detection device uses electric push rods. Three sets of electric push rods are installed in a triangular distribution between the base plate and the support platform. Both ends are connected by ball joints. The ball joints allow the electric push rods to rotate flexibly, providing a basis for angle adjustment. The ball joints will adapt to the extension and retraction of the electric push rods to change their posture, so that the extension and retraction actions are smoothly transmitted to the support platform, causing a height change at the corresponding position. The difference in the extension and retraction of the electric push rods at different positions will cause the support platform to form a corresponding tilt angle due to the different heights at each point. By precisely controlling the extension and retraction length of each electric push rod, the support platform can be adjusted in multiple angles and directions, driving the helmet to the required angle. In conjunction with the impact component, impact detection in different directions is completed, accurately simulating the actual scene and improving the comprehensiveness and accuracy of the detection.

[0018] (2) The helmet quality detection device, through the setting of the connecting rod, when the helmet is fixed, the limit cylinder is activated, and its extension and retraction drive the transmission frame to move. Through the transmission rod, the connecting rod rotates around the hinge with the limit rod. When the connecting rod rotates, the top limit block moves to the inside of the helmet. The limit components are distributed on both sides of the helmet's axis of symmetry. The two sets of limit rods, connecting rods and limit blocks are symmetrically arranged. Utilizing the balanced force characteristics of the helmet's symmetrical structure, no matter how the helmet size and symmetry curvature change, the symmetrically distributed limit blocks can adaptively fit the inner walls on both sides, avoiding one side being too tight or loose. This ensures both the stability of the fixation and adaptability to helmets of different symmetrical specifications, significantly improving versatility. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the firing pin mounting structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the support platform installation structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the connecting rod installation structure of this utility model;

[0023] In the diagram: 1. Base plate; 2. Detection mechanism; 21. Impact assembly; 211. Fixing frame; 212. Air chamber; 213. Sealing ring; 214. Impact pin; 215. Rubber ring; 217. Compression cylinder; 22. Support assembly; 221. Ball head; 222. Electric actuator; 223. Support platform; 23. Limiting assembly; 231. Limiting rod; 232. Connecting rod; 233. Limiting block; 234. Transmission rod; 235. Transmission frame; 236. Limiting cylinder. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1-4 This utility model provides a technical solution: a helmet quality testing device, including a base plate 1, and a testing mechanism 2 disposed above the base plate 1.

[0026] Impact assembly 21, disposed above base plate 1 for impacting helmets, includes a mounting bracket 211 fixedly mounted above base plate 1. An air chamber 212 is fixedly mounted on the upper end of the mounting bracket 211. A sealing ring 213 is fitted into the lower part of the inner cavity of the air chamber 212. A firing pin 214 is inserted through the center of the air chamber 212. A rubber ring 215 is fitted into the upper end of the firing pin 214. A compression cylinder 217 is fixedly mounted on the top of the mounting bracket 211. An opening structure with a diameter smaller than the inner cavity diameter is provided at the bottom of the air chamber 212. The rubber ring 215... 5. The opening structure at the bottom of the air chamber 212 is installed vertically and equidistantly on the inner wall of the opening structure. The opening structure at the bottom of the air chamber 212 is fitted with the firing pin 214. The top of the firing pin 214 is provided with a disc-shaped protrusion structure that fits into the inner cavity of the air chamber 212. The rubber ring 215 is fitted and installed on the outside of the protrusion structure at the top of the firing pin 214. The rubber ring 215 is located between the outside of the protrusion structure at the top of the firing pin 214 and the inner wall of the air chamber 212. The firing pin 214 and the air chamber 212 form a sliding connection. The bottom of the compression cylinder 217 is fixedly connected to the upper surface of the central protrusion structure of the firing pin 214.

[0027] Specifically, the fixing frame 211 can limit the position of the air chamber 212 and the top of the compression cylinder 217. Since the movable end of the compression cylinder 217 points to the base plate 1 and is fixedly connected to the protruding structure on the outside of the firing pin 214, the compression cylinder 217 is at its extension limit in the initial state. The disc structure at the top of the firing pin 214 is located at the bottom of the inner cavity of the air chamber 212. During the test, the compression cylinder 217 drives the firing pin 214 to move upward to reserve installation space for the helmet. At the same time, it compresses the gas inside the air chamber 212 to store energy. Then, the gas supply to the compression cylinder 217 is cut off. The compressed gas in the air chamber 212 will drive the firing pin 214 to move downward to strike the helmet. The bottom end of the firing pin 214 is provided with a clamp to fix test pieces with different sharpness.

[0028] The support component 22 is located above the base plate 1 to adjust the helmet orientation and works with the impact component 21 to simulate impacts from different directions. The support component 22 includes a ball head 221 fixedly installed above the base plate 1. An electric push rod 222 is fixedly installed at the upper end of the ball head 221. A support platform 223 is movably installed above the electric push rod 222. The ball head 221 is mirror-symmetrically installed at both ends of the electric push rod 222. The electric push rod 222 is movably connected to the base plate 1 through the bottom end of the ball head 221 and movably connected to the support platform 223 at the top end.

[0029] Specifically, the ball head 221 facilitates the adjustment of the posture of the electric actuator 222 during its extension and retraction. The three electric actuators 222 are installed between the base plate 1 and the support platform 223 through the ball head 221. By adjusting the extension and retraction of a specific electric actuator 222, the tilt angle of the upper support platform 223 and the upper limit component 23 of the support platform 223 can be adjusted, so as to adjust the angle of the helmet.

[0030] The limiting component 23 includes a limiting rod 231 fixedly installed above the support component 22. A connecting rod 232 is movably installed at the top of the limiting rod 231. A limiting block 233 is fixedly installed at the top of the connecting rod 232. A transmission rod 234 is movably installed at the bottom of the connecting rod 232. A transmission frame 235 is movably installed at the bottom of the transmission rod 234. A limiting cylinder 236 is fixedly installed below the transmission frame 235. The connecting rod 232 has an "L" shaped structure, and the bent part is hinged to the top of the limiting rod 231. The connecting rod 232 and the limiting rod 231 are rotatably connected. The connecting rod 232 and the transmission rod 234 are rotatably connected. The transmission rod 234 and the transmission frame 235 are rotatably connected. The bottom of the limiting cylinder 236 is fixedly connected to the support platform 223.

[0031] Specifically, since helmets are generally symmetrical, and there are two sets of limiting components 23 located at the left and right ends of the support platform 223, when fixing the helmet, the central axis of the helmet is aligned with the central axis of the limiting components 23 on both sides. The helmet is then placed over the limiting components 23. In the default state, the limiting cylinder 236 is at its retraction limit, and the long side of the connecting rod 232 is in a vertical position. The limiting cylinder 236 drives the transmission frame 235 to move upward, which in turn drives the transmission rod 234 to drive the connecting rod 232 to rotate around the hinge point between itself and the limiting rod 231. This causes the limiting block 233 at the top of the limiting rod 231 to rotate outward. The two sets of limiting components 23 on both sides of the helmet's central axis tighten the helmet inside, thus limiting its position.

[0032] Specifically, the compression cylinder 217 is model DSNU-25-50-PPV-A, the electric actuator 222 is model YHB-520, and the limit cylinder 236 is model P2520RHV-32 / 12-100+RA+BH. In addition, all contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0033] During operation, staff select impact test pieces with corresponding tapers according to testing requirements and install them at the bottom clamp of the impact pin 214 to prepare for simulating different impact conditions. The compression cylinder 217 is activated, and its movable end drives the impact pin 214 to slide upwards along the inner wall of the air chamber 212. The disc-shaped protrusion at the top of the impact pin 214 compresses the gas inside the air chamber 212, achieving energy storage through compression. Simultaneously, the bottom of the impact pin 214 moves away from the support platform 223, freeing up vertical space for helmet installation. The sealing ring 213 and rubber ring 215 inside the air chamber 212 ensure airtightness and stable energy storage. The helmet is placed above the support platform 223 and fitted onto the outside of the limiting component 23. The limiting cylinder 236 is activated, and its movable end pushes the transmission frame 235 upwards, which, via the transmission rod 234, drives the "L"-shaped connecting rod 232 to rotate around the hinge point with the limiting rod 231. The top limiting block 233 of the connecting rod 232 moves inward to the inside of the helmet. Multiple sets of limiting blocks 233 are tightened from inside the helmet to securely fix the helmet. It is suitable for different sizes and specifications. According to the test scenario, the electric push rod 222 in the support component 22 is controlled to extend and retract. The electric push rod 222 adaptively adjusts its posture with the help of the ball head 221 at the bottom end. The top linkage support platform 223 changes position, so that the support platform 223 and the helmet are tilted and the angle is precisely adjusted to determine the impact position of the impact pin 214 and the impactor. Simulate the impact of different directions in reality. The compressed air cylinder 217 stops supplying air, and the compressed gas in the air chamber 212 releases energy, pushing the impact pin 214 to slide down quickly along the air chamber 212. The tapered impactor with the bottom end of the impact pin 214 impacts the preset position of the helmet to simulate the corresponding impact load, test the helmet's impact resistance performance, and complete the quality test.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for detecting helmet quality, comprising a base plate (1), characterized in that: A detection mechanism (2) is provided above the base plate (1): Impact assembly (21), located above the base plate (1), is used to impact the helmet; The support component (22) is set above the base plate (1) to adjust the helmet orientation and works with the impact component (21) to simulate impacts from different directions; The limiting component (23) includes a limiting rod (231) fixedly installed above the support component (22). A connecting rod (232) is movably installed at the top of the limiting rod (231). A limiting block (233) is fixedly installed at the top of the connecting rod (232). A transmission rod (234) is movably installed at the bottom of the connecting rod (232). A transmission frame (235) is movably installed at the bottom of the transmission rod (234). A limiting cylinder (236) is fixedly installed below the transmission frame (235).

2. The helmet quality testing device according to claim 1, characterized in that: The impact assembly (21) includes a fixed frame (211) fixedly installed above the base plate (1). An air chamber (212) is fixedly installed at the upper end of the fixed frame (211). A sealing ring (213) is fitted into the lower part of the inner cavity of the air chamber (212). A firing pin (214) is inserted through the center of the air chamber (212). A rubber ring (215) is fitted into the upper end of the firing pin (214). A compression cylinder (217) is fixedly installed at the top of the fixed frame (211).

3. The helmet quality testing device according to claim 2, characterized in that: The bottom end of the air chamber (212) is provided with an opening structure with a diameter smaller than the inner cavity diameter. The rubber ring (215) is vertically and equidistantly installed on the inner wall of the opening structure at the bottom of the air chamber (212). The opening structure at the bottom of the air chamber (212) is fitted with the firing pin (214). The top end of the firing pin (214) is provided with a disc-shaped protrusion structure that fits into the inner cavity of the air chamber (212).

4. The helmet quality testing device according to claim 2, characterized in that: The rubber ring (215) is fitted and installed on the outside of the protruding structure at the top of the striker (214). The rubber ring (215) is located between the outside of the protruding structure at the top of the striker (214) and the inner wall of the air chamber (212). The striker (214) and the air chamber (212) form a sliding connection. The bottom end of the compression cylinder (217) is fixedly connected to the upper surface of the central protruding structure of the striker (214).

5. The helmet quality testing device according to claim 1, characterized in that: The support assembly (22) includes a ball head (221) fixedly installed above the base plate (1). An electric actuator (222) is fixedly installed at the upper end of the ball head (221). A support platform (223) is movably installed above the electric actuator (222). The ball head (221) is mirror-symmetrically installed at both ends of the electric actuator (222). The electric actuator (222) is movably connected to the base plate (1) through the bottom end of the ball head (221) and movably connected to the support platform (223) at the top end.

6. The helmet quality testing device according to claim 5, characterized in that: The connecting rod (232) has an "L" shaped structure, and the bent part is hinged to the top of the limiting rod (231). The connecting rod (232) and the limiting rod (231) are rotatably connected. The connecting rod (232) and the transmission rod (234) are rotatably connected. The transmission rod (234) and the transmission frame (235) are rotatably connected. The bottom end of the limiting cylinder (236) is fixedly connected to the support platform (223).

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