A performance testing device for protective helmets in factory workshops

Abstract

A performance testing device for protective helmets in a factory workshop comprises a base, wherein four vertical first telescopic rods are respectively installed at the four corners of the top surface of the base, the top ends of the movable ends of the four first telescopic rods are connected by a first connecting plate, a plurality of second telescopic rods are installed at the bottom end of the first connecting plate, and the bottom ends of the movable ends of the plurality of second telescopic rods are connected by a second connecting plate, the movable end of the third telescopic rod is inserted into a slot, the screw rod rotates in the opposite direction, driving the nut and the guide sleeve to move upward, and the test head moves upward to facilitate the next collision test. The present invention can perform press tests and collision tests, and during the test process, the side of the protective helmet can be tested, thereby meeting more safety testing needs and making the protective helmet safer.

Description

Technical Field

[0001] The invention belongs to the technical field of detection equipment, and particularly relates to a performance detection device for protective helmets in factory workshops. Background Art

[0002] Currently, when testing protective helmets, the protective helmets are directly placed on the ground or on a platform, and the testing equipment tests the protective helmets from above. However, when the side of the protective helmet needs to face upward, the protective helmet cannot be placed, which is inconvenient during testing. Summary of the Invention

[0003] In order to solve the deficiencies mentioned in the above-mentioned prior art, the present invention provides a performance testing device for protective helmets in factory workshops.

[0004] The present application proposes a performance testing device for protective helmets in factory workshops, comprising a base, wherein four vertical first telescopic rods are respectively installed at the four corners of the top surface of the base, the top ends of the movable ends of the four first telescopic rods are connected by a first connecting plate, a plurality of second telescopic rods are installed at the bottom end of the first connecting plate, and the bottom ends of the movable ends of the plurality of second telescopic rods are connected by a second connecting plate, guide rods are respectively fixedly installed on both sides of the bottom end of the second connecting plate, a limiting block is installed at the bottom end of the guide rod, a guide sleeve is fitted on the guide rod, slots are respectively provided on the inner walls of both sides of the guide sleeve, a cavity is provided in the guide rod, and a cavity is respectively provided on both sides of the cavity A through slot is provided, and a screw rod with a motor is movably installed in the cavity. A nut is provided on the thread on the screw rod. The third telescopic rods are fixedly installed on both sides of the top of the nut. The extension directions of the two third telescopic rods are opposite. The opposite ends of the two guide sleeves are fixedly installed with L-shaped rods. The test head is installed between the bottom ends of the vertical rods of the L-shaped rods. A support rod is movably installed in the center of the top of the base. A placement limiting mechanism is provided at the top of the support rod. A rotating mechanism is provided in the base. The fourth telescopic rod is installed on the rotating mechanism. A bearing is installed on the outer periphery of the support rod. The movable end of the fourth telescopic rod is hingedly connected to the outer wall of the outer ring of the bearing.

[0005] Specifically, a buffer spring is installed on the limiting block, and the guide rod is fitted with the buffer spring.

[0006] Specifically, the rotation mechanism includes a first annular groove opened at the top of the base, a placement cavity opened in the base, the bottom end of the first annular groove is connected to the placement cavity, a gear ring is provided in the placement cavity, and a control mechanism for controlling the rotation of the gear ring is provided in the placement cavity. A connecting block is installed at the top of the eccentric part of the gear ring, the connecting block is connected to the fixed end of the fourth telescopic rod, and the connecting block passes through the first annular groove.

[0007] Specifically, a second annular groove is provided at the bottom end of the placement cavity, and several moving blocks are arranged in the second annular groove. A connecting block is installed at the top end of the moving block, and the top end of the connecting block is connected to the bottom end of the gear ring.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] The first telescopic rod is extended to create space between the upper component and the base, and then the protective helmet is placed on the placement limiting mechanism. At this time, the first telescopic rod is retracted to adjust the distance between the upper component and the base. After adjustment, when a press test is required, the second telescopic rod is extended to drive the second connecting plate, the L-shaped rod, and the test head to move downward. The test head contacts the protective helmet and performs a press test. When a non-top center point of the protective helmet needs to be pressed, the fourth telescopic rod is retracted to pull the support rod toward the fourth telescopic rod, that is, the support rod is folded toward the fourth telescopic rod. At this time, the side of the protective helmet is exposed, and then a side press test is performed. When a fall test is required, the test head selects a suitable height under the adjustment of the first telescopic rod or the second telescopic rod, the third telescopic rod is retracted, and the moving end of the third telescopic rod is moved out of the slot. Under the gravity and Under the weight of the L-shaped rod and the test head, the guide sleeve moves downward along the guide rod, and the test head collides with the protective helmet to perform a safety test on the protective helmet. Moreover, the collision test can also test the side of the protective helmet. When the guide sleeve needs to move to the top of the guide rod, the screw rod rotates, and the cooperation of the third telescopic rod and the through slot limits the nut, so that the nut drives the third telescopic rod to move downward. When the third telescopic rod and the slot are in the same horizontal plane, the third telescopic rod extends, and the moving end of the third telescopic rod is inserted into the slot. The screw rod rotates in the opposite direction, driving the nut and the guide sleeve to move upward, and the test head moves upward to facilitate the next collision test. The present invention can perform press tests and collision tests, and during the test process, the side of the protective helmet can be tested, which meets more safety testing needs and makes the protective helmet safer. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0011] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 yes Figure 1 A partial enlarged view of I; Figure 3 yes Figure 1 A partial enlarged view of II. DETAILED DESCRIPTION

[0012] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0013] A performance testing device for protective helmets in workshops, such as Figure 1-3As shown, it includes a base 1, and the four corners of the top surface of the base 1 are respectively installed with vertical first telescopic rods 2, the top ends of the moving ends of the four first telescopic rods 2 are connected by a first connecting plate 3, the bottom end of the first connecting plate 3 is installed with several second telescopic rods 4, several second telescopic rods 4 are evenly distributed, and the bottom ends of the moving ends of several second telescopic rods 4 are connected by a second connecting plate 5, and guide rods 6 are fixedly installed on both sides of the bottom end of the second connecting plate 5, and a limiting block 7 is installed at the bottom end of the guide rod 6. A guide sleeve 8 is provided on the guide rod 6. The limiting block 7 The diameter is larger than the diameter of the guide sleeve 8, and slots 9 are respectively provided on the inner walls on both sides of the guide sleeve 8. A cavity 10 is provided in the guide rod 6, and through grooves 11 are respectively provided on both sides of the cavity 10. A screw rod 12 with a motor is movably installed in the cavity 10, and the motor of the screw rod 12 is installed on the top inner wall of the cavity 10. The bottom end of the screw rod 12 is movably connected to the bottom inner wall of the cavity, and a nut is provided on the screw rod 12. The third telescopic rod 13 is fixedly installed on both sides of the top of the nut. The extension directions of the two third telescopic rods 13 are opposite. The third telescopic rod 1 The part of 3 is always located in the through groove 11, and the screw rod 12 rotates. The part of the third telescopic rod 13 is located in the through groove 11, and the nut can be limited so that the nut can move up and down along the screw rod. The movable end of the third telescopic rod 13 can be inserted into the slot 9. The opposite ends of the two guide sleeves 8 are fixed with L-shaped rods 14 respectively. The test head is installed between the bottom ends of the vertical rods of the L-shaped rods 14. The test head can choose a pointed tip or a flat bottom, as well as other test heads, which can be installed as needed. A support rod 15 is movably installed at the center of the top of the base 1. The top of the support rod 15 is provided with a placement limiting mechanism. The protective helmet is placed on the placement limiting mechanism, and the placement limiting mechanism supports the protective helmet. A rotating mechanism is provided in the base 1. The fourth telescopic rod 16 is installed on the rotating mechanism. The outer periphery of the support rod 15 is provided with a bearing. The inner wall of the inner ring of the bearing is connected to the outer periphery of the support rod 15. When the fourth telescopic rod 16 contracts, the support rod 15 can be folded with the connection point with the base 1 as the center, and the movable end of the fourth telescopic rod 16 is hingedly connected to the outer wall of the outer ring of the bearing.The first telescopic rod 2 is extended to create space between the upper component and the base 1, and then the protective helmet is placed on the placement limiting mechanism. At this time, the first telescopic rod 2 is retracted to adjust the distance between the upper component and the base 1. After adjustment, when a press test is required, the second telescopic rod 4 is extended to drive the second connecting plate 5, the L-shaped rod 14, and the test head to move downward. The test head contacts the protective helmet and performs a press test. When a non-top center point of the protective helmet needs to be pressed, the fourth telescopic rod 16 is retracted to pull the support rod 15 toward the fourth telescopic rod 16, that is, the support rod 15 is folded toward the fourth telescopic rod 16. At this time, the side of the protective helmet is exposed, and then a side press test is performed. When a fall test is required, the test head selects a suitable height under the adjustment of the first telescopic rod 2 or the second telescopic rod 14, the third telescopic rod 13 is retracted, and the moving end of the third telescopic rod 13 is moved out of the slot 9. Under the force of gravity and the weight of the L-shaped rod 14 and the test head, the guide sleeve 8 moves downward along the guide rod 6, and the test head collides with the protective helmet to perform a safety test on the protective helmet. Moreover, the collision test can also detect the side of the protective helmet. When the guide sleeve 8 needs to move to the top of the guide rod 6, the screw rod 12 rotates, and the cooperation of the third telescopic rod 13 and the through groove limits the nut, so that the nut drives the third telescopic rod 13 to move downward. When the third telescopic rod 13 and the slot 9 are in the same horizontal plane, the third telescopic rod 13 extends, and the moving end of the third telescopic rod 13 is inserted into the slot. The screw rod rotates in the opposite direction, driving the nut and the guide sleeve to move upward, and the test head moves upward, which is convenient for the next collision test. The present invention can perform press test and collision test, and during the test, the side of the protective helmet can be tested, which meets more safety test needs and makes the protective helmet safer.

[0014] Specifically, a buffer spring is installed on the limiting block 7 of this embodiment, and the guide rod 6 is fitted with the buffer spring. The guide rod 6 passes through the buffer spring, and the guide sleeve can avoid collision with the limiting block 7 during the downward fall through the action of the buffer spring, thereby preventing the limiting block 7 from being damaged.

[0015] Furthermore, the placement restriction mechanism described in this embodiment includes several spring telescopic rods 17, the fixed ends of which are mounted on the top of the support rod 15. The spring telescopic rods 17 are evenly distributed around the center of the support rod 15. The spring telescopic rods 17 extend outward. After entering the protective helmet, the movable ends of the spring telescopic rods 17 extend and contact the inner wall of the protective helmet, restraining the protective helmet and preventing it from moving.

[0016] Furthermore, the rotation mechanism described in this embodiment includes a first annular groove 18 defined at the top of the base 1, a placement cavity defined within the base 1, the bottom end of the first annular groove 18 communicating with the placement cavity, a gear ring 19 cooperating with a control mechanism for controlling the rotation of the gear ring 19, a connecting block mounted at the eccentric top of the gear ring 19, the connecting block connected to the fixed end of the fourth telescopic rod, and the connecting block passing through the first annular groove. The control mechanism can be a motor, with a gear mounted at the top of the motor's output shaft, which meshes with the gear ring 9. Rotation of the gear ring 19 drives the connecting block and the fourth telescopic rod to rotate. By extending or contracting the fourth telescopic rod, the support rod 15 can be adjusted in various directions to meet the testing requirements of protective helmets at different angles.

[0017] Furthermore, the bottom end of the placement cavity of this embodiment is provided with a second annular groove 20. Several movable blocks are fitted within this second annular groove 20. Connecting blocks are mounted on the top ends of the movable blocks, and the top ends of the connecting blocks are connected to the bottom end of the ring gear 19. During the rotation of the ring gear 19, the engagement of the movable blocks with the second annular groove 20 restrains the ring gear 19, preventing it from shifting and providing a more stable structure.

[0018] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A performance testing device for protective helmets in workshops, characterized by: The invention comprises a base (1), wherein four corners of the top surface of the base (1) are respectively installed with vertical first telescopic rods (2), the top ends of the movable ends of the four first telescopic rods (2) are connected by a first connecting plate (3), the bottom end of the first connecting plate (3) is installed with a plurality of second telescopic rods (4), the bottom ends of the movable ends of the plurality of second telescopic rods (4) are connected by a second connecting plate (5), the two sides of the bottom end of the second connecting plate (5) are respectively fixed with guide rods (6), the bottom end of the guide rod (6) is installed with a limiting block (7), the guide rod (6) is fitted with a guide sleeve (8), the inner walls of the two sides of the guide sleeve (8) are respectively provided with slots (9), a cavity (10) is provided in the guide rod (6), and through grooves (11) are respectively provided on both sides of the cavity (10), and the cavity (10) is provided with a plurality of through grooves (11). 0) is movably installed with a screw rod (12) with a motor, a screw nut is provided on the screw rod (12), and a third telescopic rod (13) is fixedly installed on both sides of the top of the nut. The extension directions of the two third telescopic rods (13) are opposite. The opposite ends of the two guide sleeves (8) are fixedly installed with L-shaped rods (14), and the test head is installed between the bottom ends of the vertical rods of the L-shaped rods (14). A support rod (15) is movably installed at the center of the top of the base (1), and a placement limiting mechanism is provided at the top of the support rod (15). A rotating mechanism is provided in the base (1), and a fourth telescopic rod (16) is installed on the rotating mechanism. A bearing is installed on the outer periphery of the support rod (15), and the movable end of the fourth telescopic rod (16) is hingedly connected to the outer wall of the outer ring of the bearing.

2. The performance testing device for protective helmets in workshops according to claim 1, characterized in that: A buffer spring is installed on the limiting block (7), and the guide rod (6) is fitted with the buffer spring.

3. The performance testing device for protective helmets in workshops according to claim 1, characterized in that: The placement limiting mechanism comprises a plurality of spring telescopic rods (17), and the fixed ends of the spring telescopic rods (17) are mounted on the top ends of the support rods (15).

4. The performance testing device for protective helmets in workshops according to claim 1, characterized in that: The rotating mechanism includes a first annular groove (18) provided at the top of the base (1), a placement cavity provided in the base (1), the bottom end of the first annular groove (18) being connected to the placement cavity, a gear ring (19) being provided in the placement cavity, a control mechanism for controlling the rotation of the gear ring (19) being provided in the placement cavity, a connecting block being installed at the top of the eccentric portion of the gear ring (19), the connecting block being connected to the fixed end of the fourth telescopic rod, and the connecting block passing through the first annular groove.

5. The performance testing device for protective helmets in workshops according to claim 4, characterized in that: A second annular groove (20) is provided at the bottom end of the placement cavity. Several moving blocks are arranged in the second annular groove (20). A connecting block is installed at the top end of the moving block. The top end of the connecting block is connected to the bottom end of the gear ring (19).

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