Safety helmet collision test detection device and method

Abstract

The invention relates to the technical field of detection, in particular to a safety helmet collision test detection device and method.The device comprises a base, a mounting base is arranged at the upper end of the base, a rotating disc is rotationally connected into the mounting base, two auxiliary plates are symmetrically arranged at the upper end of the rotating disc, and an auxiliary part is rotationally connected between the two auxiliary plates; the hammer head is mounted at the right end of the upper portion of the auxiliary part, the functional part is arranged at the upper end of the mounting seat, the guide part is mounted at the left end of the auxiliary part, the driving part is arranged at the upper end of the base, the pull rope is wound on the driving part, and the other end of the pull rope penetrates through the functional part and the guide part and is connected with the left end of the auxiliary part. According to the design, a mechanical lower hem collision test is carried out on the safety helmet to be detected, the probability of eccentric collision and the like caused by a free falling type collision test is effectively reduced, and the test detection effect and quality are effectively guaranteed.

Description

Technical Field

[0001] The present invention relates to a safety helmet collision test detection device and method, belonging to the technical field of detection. Background Art

[0002] A safety helmet is a crucial personal protective equipment, usually made of sturdy materials such as steel or its analogs, designed to protect the wearer's head from falling objects or other potential hazards. Modern safety helmets not only possess basic protective functions but also integrate various high-tech features, such as high-altitude fall sensing, heavy object impact sensing, unfastened strap alarm, position information (through Beidou positioning system) transmission, and remote intercom functions, thus significantly enhancing the safety of the wearer; To ensure the quality and reliability of safety helmets, collision test detection is an essential part. Currently, such detection is usually completed with the aid of a safety helmet collision test detection device, which mainly includes a stable frame, a human head model installed therein with built-in sensors, an adsorption frame that can be adjusted up and down within the frame, and a collision body located directly above the human head model and detachably connected to the lower end of the adsorption frame. During the test, first, the safety helmet to be tested is correctly placed on the human head model, then the position of the adsorption frame is adjusted to set the distance between the collision body and the safety helmet. Subsequently, the connection between the collision body and the adsorption frame is disconnected, allowing it to freely fall and impact the safety helmet to simulate real-world accidents; During this process, the built-in sensors are responsible for recording various key data during the collision process and transmitting them to the analysis system. Through precise calculation and in-depth analysis of these data, combined with a careful inspection of the appearance of the safety helmet after the collision, a comprehensive evaluation report on its performance is finally obtained. However, in actual operation, due to the need to manually adjust the height of the collision body and its free-falling motion mode, the collision point is prone to deviate from the center, which may not only affect the accuracy of the test results but also reduce the efficiency and quality of the entire detection process. Summary of the Invention

[0003] Aiming at the problems in the prior art, the present invention provides a safety helmet collision test detection device and method.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a safety helmet collision test detection device, including a base, an installation seat is arranged at the upper end of the base, a turntable is rotatably connected within the installation seat, and the turntable extends to the upper end of the installation seat. Two auxiliary plates are symmetrically arranged at the upper end of the turntable, an auxiliary member is rotatably connected between the two auxiliary plates, a hammer head is installed at the upper right end of the auxiliary member, and a functional member is arranged at the upper end of the installation seat and is located on the left side of the turntable; A guiding member is installed at the left end of the auxiliary member, and the guiding member is located on the right side of the functional member. A driving member is arranged at the upper end of the base, and the driving member is located on the left side of the mounting seat. A pulling rope is wound around the driving member, and the other end of the pulling rope penetrates through the functional member and the guiding member and is connected to the left end of the auxiliary member. A human head model is installed at the upper right part of the base, and the human head model is located on the right side of the mounting seat. An outer cover is arranged at the upper end of the base. The human head model, the driving member, the mounting seat, the auxiliary member, the guiding member, and the hammer head are all located inside the outer cover.

[0005] Further, the driving member includes a frame installed at the upper end of the base. A winding wheel is rotatably connected inside the frame. The pulling rope is wound inside the winding wheel. A driving device is arranged at the outer end of the frame, and the output shaft of the driving device is connected to the winding wheel.

[0006] Further, the functional member includes a rectangular frame installed at the upper end of the mounting seat, and the rectangular frame is located on the left side of the turntable. The movable end of the pulling rope penetrates through the rectangular frame. The upper and lower inner walls of the rectangular frame are both rotatably connected with a first guiding wheel, and the two first guiding wheels are respectively attached to the upper and lower ends of the pulling rope. The front and rear inner walls of the rectangular frame are both rotatably connected with a second guiding wheel, and the two second guiding wheels are respectively attached to the front and rear ends of the pulling rope. A positioning component is arranged on the rectangular frame, and the positioning component is located below the first guiding wheel. The other end of the positioning component is connected to the turntable.

[0007] Further, the positioning component includes a positioning rod slidably connected to the right end of the rectangular frame. A telescopic device is arranged at the left end of the rectangular frame, and the movable part of the telescopic device is connected to the positioning rod. The telescopic device is located below the first guiding wheel and on the right side of the winding wheel. An installation plate is arranged at the upper end of the turntable, and the installation plate is located on the left side of the auxiliary plate. A positioning cylinder is installed at the upper left part of the installation plate, and the positioning cylinder is located directly to the right of the positioning rod. The left end of the positioning cylinder is communicated with a tapered cylinder, and the tapered cylinder is located on the right side of the positioning rod. The tapered cylinder is arranged with a wider left side and a narrower right side.

[0008] Further, the auxiliary member includes a movable bar rotatably connected between two auxiliary plates. An auxiliary frame is installed at the upper end of the movable bar. A top plate is arranged at the upper end of the auxiliary frame. The left end of the top plate is connected to the movable end of the pulling rope. A threaded hole is formed by a leftward depression on the right end face of the top plate. A stud is threadedly connected in the threaded hole, and a hammer head is installed at the right end of the stud, and the hammer head is attached to the right end of the top plate. The upper end of the top plate is in contact with the weight, the upper end of the weight is in contact with the pressing plate, and the cross-section of the pressing plate is L-shaped. The vertical part of the pressing plate is in contact with the left end of the weight. A round rod is installed at the lower end of the pressing plate. The lower end of the round rod penetrates through the weight and the top plate and extends into the auxiliary frame. A limiting plate is arranged at the lower end of the round rod, and the limiting plate is located inside the auxiliary frame. An elastic member is installed between the upper end of the limiting plate and the lower end of the top plate, and the elastic member is located outside the round rod.

[0009] Further, the guiding member includes a first fixing frame and a second fixing frame. The first fixing frame is arranged at the left end of the auxiliary frame. The second fixing frame is installed at the left end of the movable strip, and the second fixing frame is located on the right side of the rectangular frame. The movable end of the pulling rope penetrates through the first fixing frame and the second fixing frame. Two fourth guiding wheels are symmetrically and rotatably connected inside the first fixing frame, and the two fourth guiding wheels are located at the left and right ends of the pulling rope. Two third guiding wheels are symmetrically and rotatably connected inside the second fixing frame, and the two third guiding wheels are located at the left and right ends of the pulling rope.

[0010] Further, a sensor is installed inside the human head model, and a controller is arranged at the right end of the outer cover. The controller is electrically connected to the sensor, the telescopic device, and the driving device respectively.

[0011] A method for detecting the collision test of a safety helmet includes the following steps: First step, pretreatment: First, pull the pressing plate upward, so that the round rod and the limiting plate move upward, and the elastic member generates an elastic force. Then, place a weight of appropriate weight on the upper end of the top plate according to the design requirements, and make the weight snap onto the outer end of the round rod. Then, use the elastic member, the round rod, the limiting plate, and the pressing plate to limit and install the weight between the top plate. Then, select a hammer head of appropriate specification according to the design requirements. Then, install the hammer head on the right end of the top plate according to the threaded hole and the stud. Then, install the safety helmet to be tested on the human head model. Second step, collision test: The controller makes the driving device drive the winding wheel to rotate, so as to discharge the pulling rope outward. With the assistance of the auxiliary plate, the movable strip, the auxiliary frame, and the weight, the hammer head automatically falls downward to the left, so as to perform a mechanical collision test between the hammer head and the safety helmet to be tested. Third step, detection: Use the sensor to collect the collision data and transmit the collision data to the controller. Then, the controller analyzes and calculates the collision data. Then, the controller makes the driving device drive the winding wheel to rotate in the reverse direction, so as to wind up the pulling rope, so as to turn back the auxiliary plate, the movable strip, the auxiliary frame, the weight, and the hammer head. At the same time, the telescopic device drives the positioning rod to move to the right, and under the guidance of the conical cylinder, the positioning column is inserted into the positioning cylinder, so as to correct the original positions of the auxiliary plate, the movable strip, the auxiliary frame, the weight, and the hammer head. Then, take out the safety helmet after the collision test and check the appearance of the safety helmet, so as to complete the detection of the safety helmet.

[0012] Beneficial effects of the present invention: 1. Through the second motor and the winding wheel, the pull rope is released. Because the hammer head is installed at the right end of the top plate, the center of gravity of the structure formed by the movable bar, the auxiliary frame and the top plate is eccentric. Therefore, when the pull rope is released, the hammer head will automatically swing to the lower right with the assistance of the two auxiliary plates, and then the safety helmet will be subjected to a collision test, so as to realize a mechanical swing collision test on the safety helmet to be tested, effectively reducing the probability of eccentric collision due to free fall collision test, and effectively ensuring the test effect and quality.

[0013] 2. With the assistance of the turntable, the impacting hammer head will deviate and slide down along the curved surface of the helmet, simulating the scratches on the helmet caused by the hammer head after the collision with the helmet, effectively avoiding the situation where the hammer head can only collide with the helmet due to the mechanical swing collision test, and effectively ensuring the test effect and quality.

[0014] 3. The weights are installed in a limited position through the pressure plate, round rod, limit plate and elastic part, which makes it easy to disassemble and assemble the weights and adjust the weight of the hammer head. The hammer head is installed on the right end of the top plate by using studs and threaded holes, which makes it easy to disassemble and assemble the hammer head and facilitate use.

[0015] 4. The two third guide wheels and the two fourth guide wheels will restrict the pull rope, so that the pulling part of the pull rope is parallel to the assembly formed by the movable bar, the auxiliary frame, the top plate and the hammer head. At the same time, the two first guide wheels and the two second guide wheels guide the pull rope into the winding wheel to achieve restricted guiding treatment of the pull rope, effectively reducing the probability of the pull rope moving to the outside of the winding wheel due to the winding movement, effectively ensuring the subsequent normal collision test operation, and effectively ensuring the test detection effect and quality.

[0016] 5. The positioning rod is driven to move by the second electric push rod, and the positioning rod is guided by the conical cylinder to enter the positioning cylinder, so as to correct the components formed by the movable bar, auxiliary frame, top plate and hammer head, effectively reduce the probability of deflection of the returned hammer head due to factors such as the sliding of the hammer head, effectively avoid the occurrence of offset in the collision position between the hammer head and the safety helmet during subsequent collision tests, and effectively ensure the test detection effect, quality and repeatability.

[0017] 6. Use two first electric push rods and two extrusion plates to squeeze the left and right walls of the groove, and then squeeze and conceal the human head model, so as to realize convenient disassembly and assembly of the human head model and correct the installation position, effectively reduce the probability of displacement of the collision position between the hammer head and the helmet during subsequent collision tests due to the replacement of the human head model, and effectively ensure the test effect, quality and efficiency.

[0018] 7. Drive components such as a rectangular cylinder to rotate eccentrically through a first motor, thereby adjusting the collision position of the safety helmet, achieving a mechanical adjustment of the collision position of the safety helmet, effectively reducing the probability of the collision position between the hammer head and the safety helmet shifting due to the replacement of the human head model, and effectively ensuring the test detection effect, quality, and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, objectives, and advantages of the present invention will become more apparent by reading the detailed description of the non-limiting embodiments with reference to the following drawings: Figure 1 Structural schematic diagram of a safety helmet collision test detection device of the present invention; Figure 2 Cross-sectional view of a safety helmet collision test detection device of the present invention; Figure 3 is Figure 2 Enlarged view of part A in Figure 4 is Figure 2 Enlarged view of part B in Figure 5 Assembly drawing of the mounting seat, frame, movable bar, pull rope, and hammer head in a safety helmet collision test detection device of the present invention; Figure 6 Stereogram of the mounting seat in a safety helmet collision test detection device of the present invention; Figure 7 Stereogram of the movable bar in a safety helmet collision test detection device of the present invention; Figure 8 Stereogram of the hammer head in a safety helmet collision test detection device of the present invention; Figure 9 Stereogram of the round rod in a safety helmet collision test detection device of the present invention; Figure 10 Stereogram of the rectangular frame in a safety helmet collision test detection device of the present invention; Figure 11 Schematic diagram of another embodiment of a safety helmet collision test detection device of the present invention; Figure 12 is Figure 11 Enlarged view of part C in Figure 13 Stereogram of the rectangular cylinder in a safety helmet collision test detection device of the present invention.

[0020] In the figure: 1. Outer cover, 2. Base, 3. Controller, 4. Human head model, 5. Mounting seat, 6. Frame, 7. Movable bar, 8. Pull rope, 9. Hammer head, 41. First motor, 42. Rectangular cylinder, 43. First electric push rod, 44. Extrusion plate, 45. Rubber pad, 46. Groove, 51. Turntable, 52. Positioning cylinder, 53. Mounting plate, 54. Conical cylinder, 55. Rectangular frame, 56. First guide wheel, 57. Second electric push rod, 58. Positioning rod, 59. Second guide wheel, 61. Winding wheel, 62. Second motor, 71. Auxiliary frame, 72. Third guide wheel, 73. Fourth guide wheel, 74. First fixing frame, 75. Second fixing frame, 76. Auxiliary plate, 91. Top plate, 92. Weight, 93. Round rod, 94. Pressing plate, 95. Stud, 96. Elastic member, 97. Limiting plate. Detailed implementation manner

[0021] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0022] Embodiment 1: As Figures 1-9 shown, a safety helmet collision test and detection device is provided, including a base 2. The mounting seat 5 is arranged on the upper end of the base 2. Through the mounting seat 5, an installation carrier is provided for components such as the turntable 51, and the turntable 51 extending to the upper end of the mounting seat 5 is rotatably connected in the mounting seat 5. Through the turntable 51, an installation carrier is provided for components such as the auxiliary plate 76. Then, two auxiliary plates 76 are symmetrically arranged on the upper end of the turntable 51. The two auxiliary plates 76 are used in cooperation to provide an installation carrier for the movable bar 7, and the movable bar 7 is rotatably connected between the two auxiliary plates 76. Through the movable bar 7, an installation carrier is provided for components such as the auxiliary frame 71. Then, the auxiliary frame 71 is installed on the upper end of the movable bar 7. Through the auxiliary frame 71, an installation carrier is provided for components such as the top plate 91, and the top plate 91 is arranged on the upper end of the auxiliary frame 71. Through the top plate 91, an installation carrier is provided for components such as the hammer head 9; A threaded hole is formed by a leftward depression on the right end face of the top plate 91. Through the threaded hole, an installation space is provided for the stud 95. The stud 95 is threadedly connected into the threaded hole. The stud 95 and the threaded hole are used in cooperation to enable a detachable connection between the hammer head 9 and the top plate 91. And the hammer head 9 attached to the right end of the top plate 91 is installed on the right end of the stud 95. Through the hammer head 9, a collision test can be performed on the safety helmet to be detected. Then, the weight 92 is attached to the upper end of the top plate 91. Through the weight 92, it is used to increase the weight of the hammer head 9. Then, the pressing plate 94 with an L-shaped cross-section and the vertical part attached to the left end of the weight 92 is attached to the upper end of the weight 92. Through the pressing plate 94, the weight 92 is installed in a limited position between the top plate 91. And the round rod 93 with the lower end passing through the weight 92 and the top plate 91 and extending into the auxiliary frame 71 is installed on the lower end of the pressing plate 94. Through the round rod 93, the pressing plate 94 and the limiting plate 97 are connected. Then, the limiting plate 97 located in the auxiliary frame 71 is arranged on the lower end of the round rod 93. Through the limiting plate 97, the elastic member 96 is compressed. And the elastic member 96 located outside the round rod 93 is installed between the upper end of the limiting plate 97 and the lower end of the top plate 91. Through the elastic member 96, the pressing plate 94 is pressed down. The elastic member 96 can be a spring; The frame 6 is installed on the upper end of the base 2. Through the frame 6, an installation carrier is provided for components such as the winding wheel 61. And the winding wheel 61 located on the left side of the mounting seat 5 is rotatably connected in the frame 6. Through the winding wheel 61, the pull rope 8 is wound. Then, the pull rope 8 with the movable end passing through the first fixing frame 74 and the second fixing frame 75 and connected to the left end of the top plate 91 is wound in the winding wheel 61. Through the pull rope 8, a connection is made between the winding wheel 61 and the top plate 91. And the fixed part of the driving device with the output shaft connected to the winding wheel 61 is arranged on the outer end of the frame 6. Through the driving device, the winding wheel 61 is driven to rotate. The driving device can be the second motor 62. Then, the human head model 4 located on the right side of the mounting seat 5 is installed on the upper right part of the base 2. Through the human head model 4, an installation carrier is provided for the safety helmet to be detected. And the outer cover 1 is arranged on the upper end of the base 2. And the human head model 4, the mounting seat 5, the frame 6, the pressing plate 94 and the hammer head 9 are all located inside the outer cover 1. Through the outer cover 1, an installation carrier is provided for the controller 3. Then, the sensor is installed in the human head model 4. Through the sensor, it is used to collect data generated by the collision test. And the controller 3 respectively electrically connected to the sensor, the telescopic device and the driving device is arranged on the right end of the outer cover 1. Through the controller 3, on the one hand, components such as the telescopic device and the driving device are controlled, and on the other hand, the data collected by the sensor is analyzed and calculated.

[0023] In use, first select a hammer head 9 with a suitable specification and a weight 92 with a suitable weight according to the specification of the safety helmet to be detected. Then open the door part on the outer cover 1, and then pull up the pressing plate 94, so that the round rod 93 moves upward, and then the limiting plate 97 moves upward, thereby compressing the elastic member 96 to generate an elastic force on the elastic member 96. Then place a weight 92 with a suitable weight between the upper end of the top plate 91 and the pressing plate 94, and make the weight 92 catch on the outer end of the round rod 93. Then release the pressing plate 94, and under the action of the elastic force of the elastic member 96, the limiting plate 97, the round rod 93 and the pressing plate 94 move downward, and the weight 92 is clamped by the pressing plate 94 and the top plate 91. At the same time, the vertical part of the pressing plate 94 fits on the left end of the weight 92, thereby realizing the limit installation of the weight 92, realizing the convenient disassembly and assembly of the weight 92, facilitating the adjustment of the weight of the hammer head 9. Then thread the stud 95 on the hammer head 9 with a suitable specification into the threaded hole, so that the hammer head 9 is installed on the right end of the top plate 91, realizing the convenient disassembly and assembly of the hammer head 9 and facilitating use; Then install the safety helmet to be detected on the human head model 4, then close the door part on the outer cover 1, and then start the second motor 62 through the controller 3, thereby driving the winding wheel 61 to rotate, and then releasing the pull rope 8 wound on the winding wheel 61. At this time, because the hammer head 9 is installed on the right end of the top plate 91, the center of gravity of the structure formed by components such as the movable bar 7, the auxiliary frame 71 and the top plate 91 is in an eccentric state. Therefore, when the pull rope 8 is released, the hammer head 9 will automatically swing downward to the right under the assistance of the two auxiliary plates 76, and then the hammer head 9 will collide with the safety helmet to be detected installed, realizing a mechanical pendulum collision test on the safety helmet to be detected, effectively reducing the probability of eccentric collision and the like caused by a free-fall collision test, and effectively ensuring the test detection effect and quality; When the hammer head 9 collides with the safety helmet to be detected, the sensor installed in the human head model 4 will collect the data generated by the collision and transmit the collected collision data to the controller 3, and the controller 3 calculates and analyzes the collision data, thereby completing the collision test of the safety helmet. At the same time, because the top of the safety helmet is in a curved surface state, and with the assistance of the turntable 51, the impacting hammer head 9 will move offset and slide along the curved surface state of the safety helmet, realizing the simulation of phenomena such as scratching of the safety helmet after the hammer head 9 collides with the safety helmet, effectively avoiding that the hammer head 9 can only collide with the safety helmet due to a mechanical pendulum collision test, and effectively ensuring the test detection effect and quality; After the test is completed, the pull rope 8 is reeled in by the second motor 62 and the reel 61, so that the assembly formed by the movable bar 7, the auxiliary frame 71, the top plate 91 and the hammer head 9 and other components is pulled back to its original position to facilitate the subsequent collision test, and then the door on the outer cover 1 is opened, and then the safety helmet after the collision test is disassembled from the human head model 4, and then the appearance of the disassembled safety helmet is inspected, and then the result of the collision test and the appearance status are combined to analyze the detection result of the safety helmet, and then complete the collision test detection operation of the safety helmet.

[0024] Embodiment 2: The mechanical structure formed by the second motor 62, the winding wheel 61, the pull rope 8, the auxiliary plate 76, the movable bar 7, the auxiliary frame 71, the top plate 91 and the weight 92 is cleverly used to realize the mechanical swinging movement of the hammer head 9 on the helmet, thereby simulating a real collision test. Through the sensor and the controller 3, various data generated during the collision can be collected, calculated and analyzed to ensure the scientificity and reliability of the test results. In addition, the design of the turntable 51 enables the hammer head 9 to slide naturally along the outer surface of the helmet after the collision, thereby enhancing the realism of the test, thereby effectively ensuring the accuracy of the appearance inspection of the helmet after the test. However, in the process of using the second motor 62, the winding wheel 61 and the pull rope 8 to return the hammer head 9 and other components, due to the rotatability of the turntable 51, it is easy to cause deflection and the like when returning to the original position, thereby increasing the risk of the pull rope 8 deviating from the winding wheel 61. This deviation not only affects the stability of the system, but may also cause the impact point between the hammer head 9 and the helmet to shift in subsequent collision tests, thereby affecting the consistency and repeatability of the test.

[0025] In order to solve the above problems, Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 10 As shown, the rectangular frame 55 located on the left side of the turntable 51 is installed on the upper end of the mounting seat 5, and the movable end of the pull rope 8 passes through the rectangular frame 55, and the rectangular frame 55 provides a mounting carrier for the first guide wheel 56 and other components, and the two first guide wheels 56 respectively attached to the upper and lower ends of the pull rope 8 are rotatably connected to the upper and lower walls inside the rectangular frame 55, and then the two second guide wheels 59 respectively attached to the front and rear ends of the pull rope 8 are rotatably connected to the front and rear walls inside the rectangular frame 55, and the two first guide wheels 56 and the two second guide wheels 59 are used in conjunction with each other to guide the pull rope 8; The first fixing bracket 74 is arranged on the left end of the auxiliary bracket 71. Through the first fixing bracket 74, an installation carrier is provided for the fourth guide wheel 73. And the second fixing bracket 75 located on the right side of the rectangular frame 55 is installed on the left end of the movable bar 7. Through the second fixing bracket 75, an installation carrier is provided for the third guide wheel 72. Then, the two fourth guide wheels 73 located at the left and right ends of the pull rope 8 are symmetrically and rotatably connected inside the first fixing bracket 74. The two fourth guide wheels 73 are used in cooperation to guide the pull rope 8. And the two third guide wheels 72 located at the left and right ends of the pull rope 8 are symmetrically and rotatably connected inside the second fixing bracket 75. The two third guide wheels 72 are used in cooperation to guide the pull rope 8; The positioning rod 58 is slidably connected to the right end of the rectangular frame 55. Through the positioning rod 58, the positioning cylinder 52 is reset. And the fixed part of the telescopic device, which is connected to the positioning rod 58, located below the first guide wheel 56 and on the right side of the winding wheel 61, is arranged on the left end of the rectangular frame 55. Through the telescopic device, the positioning rod 58 is driven to move left and right. The telescopic device can adopt the second electric push rod 57. Then, the mounting plate 53 located on the left side of the auxiliary plate 76 is arranged on the upper end of the turntable 51. Through the mounting plate 53, an installation carrier is provided for the positioning cylinder 52. And the positioning cylinder 52 located directly to the right of the positioning rod 58 is installed on the upper left end of the mounting plate 53. Through the positioning cylinder 52, an installation space is provided for the positioning rod 58. Then, the conical cylinder 54, which is arranged with a wider left side and a narrower right side and is located below the second fixing bracket 75 on the right side of the positioning rod 58, is communicatively installed on the left end of the positioning cylinder 52. Through the conical cylinder 54, the positioning rod 58 is guided into the positioning cylinder 52.

[0026] During use, first, a weight 92 of appropriate weight is limited and installed on the upper end of the top plate 91 by using the pressing plate 94, the round rod 93, the limiting plate 97 and the elastic member 96. And a hammer head 9 of appropriate specification is installed on the right end of the top plate 91 by using the stud 95 and the threaded hole. Then, the safety helmet to be tested is installed on the human head model 4. Then, the second motor 62 and the winding wheel 61 are used to release the pull rope 8. At this time, the hammer head 9 will automatically swing downward to the right, and thus the hammer head 9 will collide with the installed safety helmet to be tested; After the test and detection are completed, the second motor 62 and the winding wheel 61 are used to wind up the pull rope 8. At this time, the two third guide wheels 72 and the two fourth guide wheels 73 will restrict the pull rope 8, so that the pulling part of the pull rope 8 is parallel to the assembly formed by components such as the movable bar 7, the auxiliary bracket 71, the top plate 91 and the hammer head 9. At the same time, the two first guide wheels 56 and the two second guide wheels 59 guide the pull rope 8 into the winding wheel 61, realizing a restricted guiding process for the pull rope 8, effectively reducing the probability of phenomena such as the pull rope 8 moving outside the winding wheel 61 due to the winding movement, effectively ensuring the subsequent normal collision test operation, and effectively ensuring the test and detection effect and quality; Meanwhile, the controller 3 activates the second electric push rod 57, thereby driving the positioning rod 58 to move to the right and enter the conical cylinder 54. Then, under the guidance of the conical cylinder 54, the positioning rod 58 enters the positioning cylinder 52. At this time, the turntable 51 will perform a turning motion, realizing the correction of the components formed by the movable bar 7, the auxiliary frame 71, the top plate 91, the hammer head 9, etc. during the return process, effectively reducing the probability of deflection of the returned hammer head 9 due to factors such as the sliding of the hammer head 9, effectively avoiding phenomena such as the offset of the collision position between the hammer head 9 and the safety helmet during subsequent collision tests, and effectively ensuring the test detection effect, quality, and repeatability.

[0027] Embodiment 3: Skillfully utilize the mechanical structure formed by the second motor 62, the winding wheel 61, the pulling rope 8, the auxiliary plate 76, the movable bar 7, the auxiliary frame 71, the top plate 91, and the weight 92 to realize the mechanical pendulum motion of the hammer head 9 on the safety helmet, thereby simulating a real collision test. Through the sensor and the controller 3, various data generated during the collision process can be collected, calculated, and analyzed to ensure the scientificity and reliability of the test results. However, it should be noted that effective safety helmet designs usually include strengthening structures such as a top protrusion, and these structures are likely to directly contact the hammer head 9 during actual collision tests. To comprehensively evaluate the overall performance of the safety helmet, it is usually necessary to perform multiple transposition operations on the human head model 4 and repeat the collision test. Such frequent transposition operations may cause the collision point between the hammer head 9 and the safety helmet to shift.

[0028] To solve the above problems, as Figures 11-13 shown, a groove 46 is formed by recessing the lower end surface of the human head model 4 attached to the upper end of the base 2 upward. Through the groove 46, an installation space is provided for components such as the rectangular cylinder 42, and the rectangular cylinder 42 located in the groove 46 is attached to the upper end of the base 2. Through the rectangular cylinder 42, an installation carrier is provided for the first electric push rod 43. Then, the fixed parts of the two first electric push rods 43 arranged oppositely and electrically connected to the controller 3 are symmetrically arranged in the rectangular cylinder 42. Through the first electric push rod 43, the extrusion plate 44 is driven to move left and right; Two extrusion plates 44 with an arc-shaped cross-section and the same width dimension as the groove 46 are respectively arranged on the left and right sides of the rectangular cylinder 42, and the two extrusion plates 44 are respectively connected to the outer ends of the movable parts of the two first electric push rods 43. The two extrusion plates 44 are used in cooperation to perform an extrusion clamping on the human head model 4, and two rubber pads 45 respectively attached to the left and right inner walls of the groove 46 are respectively installed on the outer ends of the two extrusion plates 44. The two rubber pads 45 are used in cooperation to protect the human head model 4. The fixed part of the first motor 41 with an eccentric connection between the output shaft and the rectangular cylinder 42 and electrically connected to the controller 3 is installed on the inner top end of the base 2. Through the first motor 41, the rectangular cylinder 42 is driven to rotate.

[0029] During use, first use the controller 3 to start two first electric push rods 43, thereby driving the two pressing plates 44 to move inward. Then place the human head model 4 on the upper end of the base 2. At this time, components such as the rectangular cylinder 42 and the two pressing plates 44 are located in the groove 46. Then use the two first electric push rods 43 to make the two pressing plates 44 move outward, thereby using the two pressing plates 44 to squeeze the left and right inner walls of the groove 46, and further squeeze and hide the clamping of the human head model 4. At the same time, if the human head model 4 is placed in a deviated position, the human head model 4 will move, so that the human head model 4 moves to the test position, realizing convenient disassembly and assembly of the human head model 4 and correcting the installation position, effectively reducing the probability of deviation of the collision position between the hammer head 9 and the safety helmet during subsequent collision tests due to the replacement of the human head model 4, and effectively ensuring the test detection effect, quality and efficiency; First, use the pressing plate 94, the round rod 93, the limiting plate 97 and the elastic member 96 to limit and install the weight 92 of appropriate weight on the upper end of the top plate 91, and use the stud 95 and the threaded hole to install the hammer head 9 of appropriate specification on the right end of the top plate 91. Then install the safety helmet to be tested on the human head model 4. Then use the second motor 62 and the winding wheel 61 to release the pulling rope 8. At this time, the hammer head 9 will automatically swing downward to the right, and then the hammer head 9 will perform a primary collision test on the installed safety helmet to be tested; After the primary collision test, use the second motor 62, the winding wheel 61, the pulling rope 8, the two third guide wheels 72, the two fourth guide wheels 73, the two first guide wheels 56 and the two second guide wheels 59 to return the components such as the hammer head 9 to their original positions, and use the second electric push rod 57, the positioning rod 58, the conical cylinder 54 and the positioning cylinder 52 to correct the original positions of the components such as the hammer head 9; Then use the controller 3 to start the first motor 41. Since the rectangular cylinder 42 is eccentrically connected to the output shaft of the first motor 41, the first motor 41 drives the components such as the rectangular cylinder 42 to perform eccentric rotation, and then makes the clamped human head model 4 perform eccentric rotation, so that the installed safety helmet performs eccentric movement, and then adjusts the collision position of the safety helmet. Then repeat the above steps again, so as to perform multiple collision tests on the safety helmet, realizing mechanical adjustment of the collision position of the safety helmet, effectively reducing the probability of deviation of the collision position between the hammer head 9 and the safety helmet due to the replacement of the human head model 4, and effectively ensuring the test detection effect, quality and efficiency.

[0030] A method for testing the collision of a safety helmet includes the following steps: Step 1, Pretreatment: First, pull up the pressing plate 94, so that the round rod 93 and the limiting plate 97 move upward, and the elastic member 96 generates an elastic force. Then, place a weight 92 of appropriate weight on the upper end of the top plate 91 according to the design requirements, and make the weight 92 snap onto the outer end of the round rod 93. Then, use the elastic member 96, the round rod 93, the limiting plate 97 and the pressing plate 94 to limit and install the weight 92 between the weight 92 and the top plate 91. Then, select a hammer head 9 of appropriate specification according to the design requirements. Then, install the hammer head 9 on the right end of the top plate 91 according to the threaded hole and the stud 95. Then, install the safety helmet to be tested on the human head model 4; Step 2, Impact test: The controller 3 is used to drive the driving device to rotate the winding wheel 61, so as to discharge the pulling rope 8 outwards. With the assistance of the auxiliary plate 76, the movable bar 7, the auxiliary frame 71 and the weight 92, the hammer head 9 automatically falls down to the lower left, so as to perform a mechanical impact test between the hammer head 9 and the safety helmet to be tested; Step 3, Detection: The sensor is used to collect the impact data and transmit the impact data to the controller 3. Then, the controller 3 analyzes and calculates the impact data. Then, the controller 3 is used to drive the driving device to rotate the winding wheel 61 in the reverse direction, so as to wind up the pulling rope 8, so as to turn back the auxiliary plate 76, the movable bar 7, the auxiliary frame 71, the weight 92 and the hammer head 9. At the same time, the telescopic device drives the positioning rod 58 to move to the right, and under the guidance of the conical cylinder 54, the positioning column is inserted into the positioning cylinder 52, so as to correct the original positions of the auxiliary plate 76, the movable bar 7, the auxiliary frame 71, the weight 92 and the hammer head 9. Then, take out the safety helmet after the impact test and check the appearance of the safety helmet, so as to complete the detection of the safety helmet.

[0031] Although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A safety helmet collision test detection device, characterized in that: It includes a base (2). An installation seat (5) is arranged at the upper end of the base (2). A turntable (51) is rotatably connected inside the installation seat (5), and the turntable (51) extends to the upper end of the installation seat (5). Two auxiliary plates (76) are symmetrically arranged at the upper end of the turntable (51). An auxiliary member is rotatably connected between the two auxiliary plates (76). A hammer head (9) is installed at the upper right end of the auxiliary member. A functional member is arranged at the upper end of the installation seat (5), and the functional member is located on the left side of the turntable (51). A guiding member is installed at the left end of the auxiliary member, and the guiding member is located on the right side of the functional member. A driving member is arranged at the upper end of the base (2), and the driving member is located on the left side of the installation seat (5). A pulling rope (8) is wound around the driving member, and the other end of the pulling rope (8) penetrates through the functional member and the guiding member and is connected to the left end of the auxiliary member. A human head model (4) is installed at the upper right part of the base (2), and the human head model (4) is located on the right side of the installation seat (5). An outer cover (1) is arranged at the upper end of the base (2). The human head model (4), the driving member, the installation seat (5), the auxiliary member, the guiding member, and the hammer head (9) are all located inside the outer cover (1).

2. The safety helmet impact test detection device according to claim 1, characterized in that: The driving member includes a frame (6). The frame (6) is installed at the upper end of the base (2). A winding wheel (61) is rotatably connected inside the frame (6). The pulling rope (8) is wound inside the winding wheel (61). A driving device is arranged at the outer end of the frame (6), and the output shaft of the driving device is connected to the winding wheel (61).

3. The safety helmet collision test detection device according to claim 2, wherein: The functional member includes a rectangular frame (55). The rectangular frame (55) is installed at the upper end of the installation seat (5), and the rectangular frame (55) is located on the left side of the turntable (51). The movable end of the pulling rope (8) penetrates through the rectangular frame (55). The upper and lower inner walls of the rectangular frame (55) are both rotatably connected with first guiding wheels (56), and the two first guiding wheels (56) are respectively attached to the upper and lower ends of the pulling rope (8). The front and rear inner walls of the rectangular frame (55) are both rotatably connected with second guiding wheels (59), and the two second guiding wheels (59) are respectively attached to the front and rear ends of the pulling rope (8). A positioning component is arranged on the rectangular frame (55), and the positioning component is located on the lower side of the first guiding wheel (56). The other end of the positioning component is connected to the turntable (51).

4. The safety helmet collision test detection device according to claim 3, characterized in that: The positioning component includes a positioning rod (58). The positioning rod (58) is slidably connected to the right end of the rectangular frame (55). A telescopic device is arranged at the left end of the rectangular frame (55), and the movable part of the telescopic device is connected to the positioning rod (58). The telescopic device is located on the lower side of the first guiding wheel (56) and is on the right side of the winding wheel (61). An installation plate (53) is arranged at the upper end of the turntable (51), and the installation plate (53) is located on the left side of the auxiliary plate (76). A positioning cylinder (52) is installed at the upper left end of the installation plate (53), and the positioning cylinder (52) is located directly to the right of the positioning rod (58). The left end of the positioning cylinder (52) is communicated with an installation conical cylinder (54), and the conical cylinder (54) is located on the right side of the positioning rod (58). The conical cylinder (54) is arranged with a wider left side and a narrower right side.

5. The safety helmet impact test detection device according to claim 4, wherein: The auxiliary part includes a movable bar (7), the movable bar (7) is rotatably connected between two auxiliary plates (76), an auxiliary frame (71) is installed at the upper end of the movable bar (7), a top plate (91) is arranged at the upper end of the auxiliary frame (71), the left end of the top plate (91) is connected to the movable end of a pull rope (8), a threaded hole is formed by a leftward depression on the right end face of the top plate (91), a stud (95) is threadedly connected in the threaded hole, and a hammer head (9) is installed at the right end of the stud (95), and the hammer head (9) is attached to the right end of the top plate (91); A weight (92) is attached to the upper end of the top plate (91), a pressing plate (94) is attached to the upper end of the weight (92), and the cross section of the pressing plate (94) is L-shaped. The vertical part of the pressing plate (94) is attached to the left end of the weight (92). A round rod (93) is installed at the lower end of the pressing plate (94). The lower end of the round rod (93) penetrates through the weight (92) and the top plate (91) and extends into the auxiliary frame (71). A limiting plate (97) is arranged at the lower end of the round rod (93), and the limiting plate (97) is located inside the auxiliary frame (71). An elastic member (96) is installed between the upper end of the limiting plate (97) and the lower end of the top plate (91), and the elastic member (96) is located outside the round rod (93).

6. The safety helmet impact test detection device according to claim 5, wherein: The guiding part includes a first fixing frame (74) and a second fixing frame (75). The first fixing frame (74) is arranged at the left end of the auxiliary frame (71). The second fixing frame (75) is installed at the left end of the movable bar (7), and the second fixing frame (75) is located on the right side of the rectangular frame (55). The movable end of the pull rope (8) penetrates through the first fixing frame (74) and the second fixing frame (75). Two fourth guiding wheels (73) are symmetrically and rotatably connected inside the first fixing frame (74), and the two fourth guiding wheels (73) are located at the left and right ends of the pull rope (8). Two third guiding wheels (72) are symmetrically and rotatably connected inside the second fixing frame (75), and the two third guiding wheels (72) are located at the left and right ends of the pull rope (8).

7. The safety helmet impact test detection device according to claim 6, characterized in that: A sensor is installed inside the human head model (4), and a controller (3) is arranged at the right end of the outer cover (1). The controller (3) is electrically connected to the sensor, the telescopic device, and the driving device respectively.

8. A method for detecting a safety helmet collision test, which applies the safety helmet collision test detection device described in claim 7, is characterized in that, It includes the following steps: First step, pretreatment: First, pull up the pressing plate (94) upward, so that the round rod (93) and the limiting plate (97) move upward, and the elastic member (96) generates an elastic force. Then, place a weight (92) of appropriate weight on the upper end of the top plate (91) according to the design requirements, and make the weight (92) snap onto the outer end of the round rod (93). Then, use the elastic member (96), the round rod (93), the limiting plate (97), and the pressing plate (94) to limit and install the weight (92) between the weight (92) and the top plate (91). Then, select a hammer head (9) of appropriate specification according to the design requirements. Then, install the hammer head (9) on the right end of the top plate (91) according to the threaded hole and the stud (95). Then, install the safety helmet to be detected on the human head model (4); Step 2, Collision test: The driving device is driven by the controller (3) to rotate the take-up wheel (61), so as to discharge the pull rope (8) outwards. With the assistance of the auxiliary plate (76), the movable bar (7), the auxiliary frame (71) and the weight (92), the hammer head (9) automatically falls towards the lower left, so as to conduct a mechanical collision test between the hammer head (9) and the safety helmet to be detected; Step 3, Detection: The sensor is used to collect the collision data and transmit the collision data to the controller (3). Then the controller (3) analyzes and calculates the collision data. Then the driving device is driven by the controller (3) to rotate the take-up wheel (61) in the reverse direction, so as to wind up the pull rope (8), so as to turn back the auxiliary plate (76), the movable bar (7), the auxiliary frame (71), the weight (92) and the hammer head (9). At the same time, the telescopic device drives the positioning rod (58) to move to the right, and under the guidance of the conical cylinder (54), the positioning column is inserted into the positioning cylinder (52), so as to correct the original positions of the auxiliary plate (76), the movable bar (7), the auxiliary frame (71), the weight (92) and the hammer head (9). Then the safety helmet after the collision test is taken out, and the appearance of the safety helmet is inspected, so as to complete the detection of the safety helmet.

Images