Lateral rigidity tester for strength of lower jaw belt of safety helmet

Abstract

The utility model relates to the technical field of detection equipment, and discloses a lateral rigidity tester for strength of a lower jaw belt of a safety helmet, which comprises a main body assembly, the main body assembly comprises an electric appliance control box, and the top of the electric appliance control box is fixedly connected with a test platform; the tension sensor is arranged at the top of the test platform; the mounting frame is fixedly connected to the top of the test platform; the safety helmet lateral rigidity testing device has the advantage that the safety helmet can be pre-fixed conveniently, when lateral rigidity testing of the safety helmet is needed, the safety helmet is placed on the groove of the placing plate, then an operator drives the two moving plates to be close to each other through the driving mechanism, the moving plates drive the U-shaped plates to be close to each other, and the safety helmet is fixed conveniently. And then an operator starts a hydraulic machine to drive a fixing plate to extrude the safety helmet, data are transmitted through a gravity sensor at the bottom of the fixing plate, the operator does not need to manually hold the safety helmet, and the problem that it is troublesome that the safety helmet needs to be manually pre-fixed is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, in particular to a safety helmet chin strap strength and lateral rigidity tester. Background Technique

[0002] A safety helmet refers to a hat that protects the human head from injuries caused by falling objects and other specific factors. A safety helmet consists of a hat shell, a hat liner, a chin strap and accessories, etc.

[0003] After the safety helmet manufacturer produces the finished safety helmet, it is necessary to use a device to detect the two items of chin strap strength and lateral rigidity. In the prior art, when performing the lateral rigidity test, the safety helmet is placed sideways between the upper flat plate and the lower flat plate, and the test is realized by gradually raising the lower flat plate. However, in the actual use process, due to the smooth arc surface of the outer surface of the safety helmet, the safety helmet cannot be stably placed on the lower flat plate when placed sideways, and the distance between the upper flat plate and the lower flat plate is greater than the height of the safety helmet when placed sideways. Therefore, at the initial stage of the test, the staff needs to hold the safety helmet until the lower flat plate and the upper flat plate clamp the safety helmet, and the test process is very troublesome. Content of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the utility model provides a safety helmet chin strap strength and lateral rigidity tester, which has the advantage of being convenient for pre-fixing the safety helmet, and solves the problem that it is more troublesome to pre-fix the safety helmet manually.

[0006] (2) Technical Solution

[0007] To achieve the above object, the utility model provides the following technical solution: A safety helmet chin strap strength and lateral rigidity tester, including a main body assembly; the main body assembly includes an electrical control box, the top of which is fixedly connected with a test platform; a tensile sensor is arranged on the top of the test platform; a mounting frame is fixedly connected to the top of the test platform; a hydraulic press is fixedly connected to the top of the mounting frame, and the output end thereof penetrates through the mounting frame; a fixing plate is fixedly connected to the output end of the hydraulic press; a head mold is fixedly connected to the top of the fixing plate; a pre-fixing assembly is arranged on the electrical control box, and the pre-fixing assembly includes: a mounting shell arranged on the rear surface of the mounting frame; moving plates symmetrically arranged inside the mounting shell; U-shaped plates, U-shaped plates are fixedly connected to the opposite surfaces of the two moving plates; clamping blocks, clamping blocks are slidably connected to the inside of each U-shaped plate; a first spring, a first spring is symmetrically arranged on each clamping block; a placing plate fixedly connected to the top of the tensile sensor; a driving mechanism arranged on the mounting shell.

[0008] Preferably, the driving mechanism includes: a servo motor fixedly connected to the outer side wall of the mounting shell; a bidirectional threaded rod rotatably connected to the inner side wall of the mounting shell, and the output end thereof is fixedly connected to the servo motor.

[0009] Preferably, a guide rail guard is provided on the mounting shell.

[0010] Preferably, a disassembly component is provided on the electrical control box. The disassembly component includes: plates symmetrically arranged on the rear surface of the mounting frame; a box body fixedly connected to the top of the mounting shell; limiting blocks symmetrically arranged inside the box body; second springs, each of the limiting blocks is provided with a second spring; a pulling plate, and a pulling plate is fixedly connected to the top of each of the limiting blocks.

[0011] Preferably, an inclined surface is provided on one side of each of the limiting blocks.

[0012] Preferably, a telescopic rod is provided on each of the clamping blocks.

[0013] (III) Beneficial effects

[0014] Compared with the prior art, the present utility model provides a safety helmet chin strap strength lateral rigidity tester, which has the following beneficial effects:

[0015] The present utility model has the advantage of being convenient for pre-fixing the safety helmet. When it is necessary to test the lateral rigidity of the safety helmet, the operator places the safety helmet on the groove of the placement plate. Subsequently, the operator drives the two moving plates to approach each other through the driving mechanism, so that the moving plates drive the U-shaped plates to approach each other, thereby enabling the clamping blocks on the U-shaped plates to clamp the edge of the safety helmet and be squeezed and fixed by the first spring. Subsequently, the operator starts the hydraulic press to drive the fixed plate to squeeze the safety helmet, and transmits data through the gravity sensor at the bottom of the fixed plate, without the need for the operator to manually hold it, solving the problem that it is rather troublesome to pre-fix the safety helmet manually. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the present utility model;

[0017] Figure 2 is a schematic rear view structural diagram of the present utility model;

[0018] Figure 3 is a schematic structural diagram of the installation position of some devices of the present utility model;

[0019] Figure 4 is a schematic structural diagram of the inside of the mounting shell of the present utility model;

[0020] Figure 5 is a schematic cross-sectional structural diagram of the box body of the present utility model.

[0021] In the figure:

[0022] 1. Main body component; 11. Electrical control box; 12. Test platform; 13. Tensile sensor; 14. Mounting bracket; 15. Hydraulic press; 16. Head mold; 17. Fixed plate;

[0023] 2. Pre-fixing component; 21. Mounting shell; 22. Moving plate; 23. U-shaped plate; 24. Clamping block; 25. Spring 1; 26. Placing plate; 27. Driving mechanism; 271. Servo motor; 272. Bidirectional threaded rod;

[0024] 3. Dismantling component; 31. Plate body; 32. Box body; 33. Limit block; 34. Spring 2; 35. Pulling plate;

[0025] 4. Telescopic rod; 5. Guide rail guard. Specific implementation mode

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Embodiment 1

[0028] Refer to Figures 1-5, a lateral rigidity tester for the strength of the chin strap of a safety helmet, comprising a main body assembly 1; the main body assembly 1 includes an electrical control box 11, the top of which is fixedly connected with a test platform 12; a tension sensor 13, arranged on the top of the test platform 12; a mounting frame 14, fixedly connected to the top of the test platform 12; a hydraulic press 15, fixedly connected to the top of the mounting frame 14, and the output end thereof penetrates through the mounting frame 14; a fixing plate 17, fixedly connected to the output end of the hydraulic press 15; a head mold 16, fixedly connected to the top of the fixing plate 17; a pre-fixing assembly 2 is arranged on the electrical control box 11, and the pre-fixing assembly 2 includes: a mounting shell 21, arranged on the rear surface of the mounting frame 14; moving plates 22, symmetrically arranged inside the mounting shell 21; U-shaped plates 23, fixedly connected to the opposite surfaces of the two moving plates 22; clamping blocks 24, each clamping block 24 is slidably connected inside each U-shaped plate 23; a first spring 25, symmetrically arranged on each clamping block 24; a placing plate 26, fixedly connected to the top of the tension sensor 13; a driving mechanism 27, arranged on the mounting shell 21; the driving mechanism 27 includes: a servo motor 271, fixedly connected to the outer side wall of the mounting shell 21; a bidirectional threaded rod 272, rotatably connected to the inner side wall of the mounting shell 21, and the output end thereof is fixedly connected to the servo motor 271; a guide rail guard 5 is arranged on the mounting shell 21.

[0029] When ready for use, the operator places the electrical control box 11 in a designated position. The operator puts on the safety helmet on the head mold and wraps the chin strap around the placement plate 26. Then the operator turns on the hydraulic press 15 on the mounting frame 14, and drives the head mold 16 to move upward through the fixed plate 17, so that the chin strap pulls the placement plate 26, thereby transmitting information to the electrical control box 11 through the tension sensor 13 for detection. When a lateral rigidity test of the safety helmet is required, the operator places the safety helmet on the groove of the placement plate 26. Then the operator drives the two moving plates 22 to approach each other simultaneously through the driving mechanism 27, so that the moving plates 22 drive the U-shaped plates 23 to approach each other, thereby clamping the edge of the safety helmet by the clamping blocks 24 on the U-shaped plates 23 and fixing it by extrusion through the first spring 25. Then the operator turns on the hydraulic press 15 to drive the fixed plate 17 to press the safety helmet, and transmits data through the gravity sensor at the bottom of the fixed plate 17. The operation is simple and does not require the operator to manually hold it, thus improving the practicability of the device; the operator turns on the servo motor 271 to drive the bidirectional threaded rod 272 to rotate inside the mounting shell 21, thereby driving the two moving plates 22 to move. The operation is simple and improves the convenience of the device; a guide rail guard 5 is provided on the mounting shell 21, and the guide rail guard 5 folds or extends as the moving plate 22 moves to cover one side of the mounting shell 21, thereby preventing the safety helmet from breaking during the test, resulting in flying debris entering the inside of the mounting shell 21, making it inconvenient for the operator to clean, thus improving the working efficiency of the operator.

[0030] Embodiment 2

[0031] Refer to Figures 1-5 , and the function of disassembly is added on the basis of Embodiment 1;

[0032] A disassembly component 3 is provided on the electrical control box 11. The disassembly component 3 includes: a plate body 31 symmetrically arranged on the rear surface of the mounting frame 14; a box body 32 fixedly connected to the top of the mounting shell 21; a limiting block 33 symmetrically arranged inside the box body 32; a second spring 34 provided on each limiting block 33; a pulling plate 35 fixedly connected to the top of each limiting block 33; an inclined surface is provided on one side of each limiting block 33; a telescopic rod 4 is provided on each clamping block 24.

[0033] After use, the operator pulls the two pull plates 35, causing the pull plates 35 to drive the two limit blocks 33 to squeeze the second spring 34 and completely enter the inside of the box body 32, so that the limit blocks 33 are moved out of the limit grooves on the plate body 31, making the device detachable and facilitating the operator to perform maintenance or replacement, thus improving the practicality of the device; a slope is provided on one side of each limit block 33. When the operator installs the installation shell 21, the box body 32 is driven to be inserted between the two plate bodies 31, causing the plate body 31 to squeeze the slope of the limit block 33, making the limit block 33 automatically enter the inside of the box body 32 without the operator having to pull the pull plate 35 first, thus improving the working efficiency of the operator; a telescopic rod 4 is provided on each clamping block 24, and the telescopic rod 4 can limit the moving direction of the clamping block 24, thereby preventing the clamping block 24 from being squeezed by the safety helmet and causing skew, so that the operator still needs to manually adjust its angle to fix the safety helmet, thus improving the stability of the device.

[0034] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A strength lateral rigidity tester for the chin strap of a safety helmet, comprising a main body assembly (1); the main body assembly (1) includes an electrical control box (11), with a test platform (12) fixedly connected to its top; a tension sensor (13), arranged on the top of the test platform (12); a mounting bracket (14), fixedly connected to the top of the test platform (12); a hydraulic press (15), fixedly connected to the top of the mounting bracket (14), and its output end penetrates through the mounting bracket (14); a fixing plate (17), fixedly connected to the output end of the hydraulic press (15); a head mold (16), fixedly connected to the top of the fixing plate (17); It is characterized in that: a pre-fixing assembly (2) is arranged on the electrical control box (11), and the pre-fixing assembly (2) includes: a mounting shell (21), arranged on the rear surface of the mounting bracket (14); moving plates (22), symmetrically arranged inside the mounting shell (21); U-shaped plates (23), fixedly connected to the opposite surfaces of the two moving plates (22); clamping blocks (24), each clamping block (24) is slidably connected inside each U-shaped plate (23); first springs (25), symmetrically arranged on each clamping block (24); a placement plate (26), fixedly connected to the top of the tension sensor (13); a driving mechanism (27), arranged on the mounting shell (21).

2. The strength lateral rigidity tester for the chin strap of a safety helmet according to claim 1, wherein: The driving mechanism (27) includes: a servo motor (271), fixedly connected to the outer side wall of the mounting shell (21); a bidirectional threaded rod (272), rotatably connected to the inner side wall of the mounting shell (21), and its output end is fixedly connected to the servo motor (271).

3. The strength lateral rigidity tester for the chin strap of a safety helmet according to claim 1, wherein: A guide rail guard (5) is arranged on the mounting shell (21).

4. The strength and lateral rigidity tester for the chin strap of a safety helmet according to claim 1, wherein: a disassembly assembly (3) is arranged on the electrical control box (11), and the disassembly assembly (3) includes: plates (31), symmetrically arranged on the rear surface of the mounting bracket (14); a box body (32), fixedly connected to the top of the mounting shell (21); limit blocks (33), symmetrically arranged inside the box body (32); second springs (34), arranged on each limit block (33); pulling plates (35), fixedly connected to the top of each limit block (33).

5. The strength lateral rigidity tester for the chin strap of a safety helmet according to claim 4, wherein: An inclined surface is arranged on one side of each limit block (33).

6. The strength and lateral rigidity tester for the chin strap of a safety helmet according to claim 1, wherein: An expansion rod (4) is arranged on each clamping block (24).

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