A safety helmet impact performance tester

Abstract

The utility model provides a kind of building safety helmet impact performance testing machine, it is related to safety helmet production technical field, including test base plate, the inside of axle sleeve is equipped with driven shaft, the front side of driven shaft is connected with handle, the top of driven shaft is equipped with telescopic hydraulic rod, the top of telescopic hydraulic rod is connected with impact frame, the inside of impact frame is equipped with impact hydraulic pump rod uniformly;The utility model is through safety helmet impact performance test subassembly, staff is through hand grip handle, drive driven shaft in axle sleeve to rotate, to reach the purpose of multi-angle impact test by driven shaft drive impact frame to rotate, after impact frame turns to suitable angle, impact hydraulic pump rod impacts safety helmet body, and impact force is inducted by pressure sensing patch, and four sets of impact hydraulic pump rod can impact test in different positions, ensure to cover each key position of safety helmet body.

Description

Technical Field

[0001] This utility model relates to the field of safety helmet production technology, and in particular to a test machine for the impact performance of construction safety helmets. Background Technology

[0002] Construction safety helmets are head protection equipment worn by construction workers during construction. They mainly consist of a shell, liner, and chin strap, and can effectively resist injuries to the head from falling objects and collisions. They are important protective equipment for ensuring construction safety. The impact performance test of construction safety helmets is a key test to verify their safety performance. By placing the safety helmet on a specific device, an impact object of a specified weight is dropped freely from a certain height to impact the shell. The impact resistance of the safety helmet is observed, and it is tested to see if the shell breaks and whether the cushioning structure of the liner effectively absorbs the impact force. This test ensures that the safety helmet can effectively protect the wearer's head safety in actual use. This test is one of the important standards for measuring whether the quality of safety helmets meets the standards.

[0003] A search revealed that the document with publication number "CN219455803U" states that "this utility model relates to a novel material impact resistance testing machine, comprising a clamping mechanism, an impact rod mechanism, a test piece support mechanism, and a frame that fixes the entire testing machine. The clamping mechanism includes a support plate, a lower clamping plate, an upper clamping plate, a threaded rod, and a threaded rotating handle. The fixed end of the threaded rotating handle is connected to the frame, the threaded rod is rotatably connected to the threaded rotating handle, the upper clamping plate is fixed to one end of the threaded rod, one end of the support plate is connected to the frame, and the other end is connected to the lower clamping plate. The lower clamping plate and the upper clamping plate are arranged opposite to each other. There are multiple clamping mechanisms, each located on both sides of the test piece support mechanism." Compared with existing technologies, this utility model facilitates the clamping and fixing of various test pieces and allows for adjustment of impact speed, impact energy, and impact shape within a wide range according to specific test requirements, greatly simplifying the testing process.

[0004] However, when conducting impact performance tests on construction safety helmets, most existing equipment places the helmet on a platform and tests its impact resistance by vertical impact from top to bottom. This cannot meet the need for multi-angle impacts, which to some extent limits the comprehensiveness and accuracy of the test. At the same time, when conducting multi-angle impact tests, the stress point of the helmet will change, which can easily lead to the helmet being pushed away. Furthermore, the accuracy of testing the stress strength of the inner wall of the helmet is also poor.

[0005] Therefore, we provide a construction safety helmet impact performance testing machine to solve the above problems. Utility Model Content

[0006] To overcome the above deficiencies, this utility model provides a test machine for the impact performance of construction safety helmets.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A construction safety helmet impact performance testing machine includes a safety helmet force-bearing component on the upper side of a test base plate. The force-bearing component includes a mounting hole at the center of the upper side of the test base plate. A head simulation ball is installed inside the mounting hole, and a pressure-sensing patch is provided on the surface of the head simulation ball. A safety helmet body is installed outside the head simulation ball. Lateral fixing components are provided on the left and right sides of the mounting hole. A safety helmet impact performance testing component is located outside the mounting hole. The safety helmet impact performance testing component includes bushings on the front and rear sides of the mounting hole. A driven rotating shaft is installed inside the bushings. A handle is connected to the front side of the driven rotating shaft. A telescopic hydraulic rod is installed at the top of the driven rotating shaft. An impact frame is connected to the top of the telescopic hydraulic rod. An impact hydraulic pump rod is installed inside the impact frame.

[0009] As a further description of the above technical solution:

[0010] The pressure-sensitive patch is adhesively connected to the head simulation ball, and the head simulation ball is connected to the helmet body through the pressure-sensitive patch. The head simulation ball and the helmet body together form a force detection structure through the pressure-sensitive patch.

[0011] As a further description of the above technical solution:

[0012] The lateral fixing assembly includes an insertion base disposed outside the mounting hole, and an insertion rod is connected to the inner groove of the insertion base. The insertion base and the insertion rod are mirror-symmetrically distributed about the axis of symmetry of the mounting hole.

[0013] As a further description of the above technical solution:

[0014] The top inner side of the insertion rod is provided with a limiting hydraulic rod, and the end of the limiting hydraulic rod is connected to a shock-absorbing rubber pad. The shock-absorbing rubber pad is in contact with the safety helmet body, and the shock-absorbing rubber pad forms a telescopic limiting structure through the limiting hydraulic rod.

[0015] As a further description of the above technical solution:

[0016] The driven shaft and the bushing are connected by a slot, and the driven shaft drives the telescopic hydraulic rod to rotate along the bushing through the handle.

[0017] As a further description of the above technical solution:

[0018] The telescopic hydraulic rod is welded to the driven shaft, and the impact frame is welded to the telescopic hydraulic rod. The impact frame and the driven shaft form a telescopic structure through the telescopic hydraulic rod.

[0019] As a further description of the above technical solution:

[0020] The impact hydraulic pump rod is welded to the impact frame. There are four sets of impact hydraulic pump rods, which are arranged in a semi-circular pattern. The impact hydraulic pump rod is a servo valve-controlled hydraulic cylinder.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] 1. This utility model utilizes a safety helmet force-bearing component and a side-fixing component. When needed, the worker inserts a head simulation ball into the placement hole and then puts the safety helmet on the head simulation ball. When the impact hydraulic pump rod applies an impact force to the safety helmet, the pressure sensing patch monitors the force in real time, thereby accurately assessing the impact protection performance of each position of the safety helmet. The worker inserts the insertion rod into the insertion base, and the limiting hydraulic rod pushes the shock-absorbing rubber pad to contact the side surface of the safety helmet, thereby achieving a limiting effect. Since the shock-absorbing rubber pad is made of rubber, it can fix the safety helmet through friction, preventing displacement due to impact during the testing process.

[0023] 2. This utility model uses a safety helmet impact performance testing component. The worker holds the handle and drives the driven shaft inside the bushing to rotate. The driven shaft drives the impact frame to rotate at different angles, achieving the purpose of multi-angle impact testing. After the impact frame rotates to the appropriate angle, the impact hydraulic pump rod impacts the safety helmet body. The impact force is sensed by the pressure sensing patch. The four sets of impact hydraulic pump rods can perform impact tests on different positions to ensure coverage of all key parts of the safety helmet body. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall appearance structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the inclined structure of the driven rotating shaft of this utility model;

[0026] Figure 3 This is a schematic diagram showing the disassembled structure of the lateral fixation component of this utility model;

[0027] Figure 4 This is a schematic diagram of the lying-flat state assembly of the side-position fixing component and the safety helmet impact performance testing component of this utility model.

[0028] Figure 5 This is a schematic diagram showing the disassembled structure of the force-bearing component of the safety helmet of this utility model;

[0029] Figure 6 This is a schematic diagram of the overall disassembled structure of this utility model.

[0030] The following are the labeling elements in the diagram: 1. Test base plate; 2. Safety helmet load-bearing component; 201. Mounting hole; 202. Head simulation ball; 203. Pressure sensing patch; 204. Safety helmet body; 3. Side fixing component; 301. Insertion base; 302. Insertion rod; 303. Limiting hydraulic rod; 304. Shock-absorbing rubber pad; 4. Safety helmet impact performance test component; 401. Bushing; 402. Driven rotating shaft; 403. Handle; 404. Telescopic hydraulic rod; 405. Impact frame; 406. Impact hydraulic pump rod. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see Figure 1-6 As shown, this utility model provides a technical solution: a construction safety helmet impact performance testing machine, wherein a safety helmet force-bearing component 2 is provided on the upper side of the test base plate 1, the safety helmet force-bearing component 2 includes a mounting hole 201 located at the center of the upper side of the test base plate 1, a head simulation ball 202 is installed inside the mounting hole 201, a pressure sensing patch 203 is provided on the surface of the head simulation ball 202, a safety helmet body 204 is installed on the outer side of the head simulation ball 202, and lateral fixing is provided on the left and right sides of the mounting hole 201. Component 3, a helmet impact performance test component 4 is provided on the outside of the mounting hole 201. The helmet impact performance test component 4 includes bushings 401 provided on the front and rear sides of the mounting hole 201. A driven shaft 402 is installed on the inner side of the bushings 401. A handle 403 is connected to the front side of the driven shaft 402. A telescopic hydraulic rod 404 is installed at the top of the driven shaft 402. An impact frame 405 is connected to the top of the telescopic hydraulic rod 404. An impact hydraulic pump rod 406 is installed on the inner side of the impact frame 405.

[0033] Furthermore, the pressure-sensing patch 203 is adhesively connected to the head simulation ball 202, and the head simulation ball 202 is connected to the helmet body 204 through the pressure-sensing patch 203. The head simulation ball 202 and the helmet body 204 form a force detection structure through the pressure-sensing patch 203. When needed, the worker inserts the head simulation ball 202 into the placement hole 201 and then puts the helmet body 204 on the head simulation ball 202. When the impact hydraulic pump rod 406 applies an impact force to the helmet body 204, the pressure-sensing patch 203 monitors the force in real time, thereby accurately assessing the impact protection performance of each position of the helmet.

[0034] Furthermore, the lateral fixing component 3 includes an insertion base 301 disposed outside the mounting hole 201. An insertion rod 302 is connected to the inner groove of the insertion base 301. The insertion base 301 and the insertion rod 302 are mirror-symmetrically distributed about the axis of symmetry of the mounting hole 201. When needed, the operator inserts the insertion rod 302 into the insertion base 301. When an impact test is required, the insertion rod 302 is inserted into the insertion base 301 to fix the limiting hydraulic rod 303. When it needs to be removed, the insertion rod 302 is pulled out. The insertion rod 302 and the insertion base 301 achieve self-locking through the frictional force between them.

[0035] Furthermore, a limiting hydraulic rod 303 is provided on the inner side of the top of the insertion rod 302. The end of the limiting hydraulic rod 303 is connected to a shock-absorbing rubber pad 304. The shock-absorbing rubber pad 304 is in contact with the safety helmet body 204. The shock-absorbing rubber pad 304 forms a telescopic limiting structure through the limiting hydraulic rod 303. After the insertion rod 302 is installed, the limiting hydraulic rod 303 pushes the shock-absorbing rubber pad 304 to contact the side surface of the safety helmet body 204, thereby achieving the limiting effect. Since the shock-absorbing rubber pad 304 is made of rubber, it can fix the safety helmet body 204 through friction, preventing displacement due to impact during the testing process.

[0036] Furthermore, the driven shaft 402 and the bushing 401 are connected by a slot. The driven shaft 402 drives the telescopic hydraulic rod 404 to rotate along the bushing 401 via the handle 403. When needed, the operator holds the handle 403 to drive the driven shaft 402 inside the bushing 401 to rotate, thereby driving the impact frame 405 to rotate at an angle to achieve the purpose of multi-angle impact testing.

[0037] Furthermore, the telescopic hydraulic rod 404 is welded to the driven rotating shaft 402, and the impact frame 405 is welded to the telescopic hydraulic rod 404. The impact frame 405 and the driven rotating shaft 402 form a telescopic structure through the telescopic hydraulic rod 404. When needed, since the shape and size of helmets vary, the length of the telescopic hydraulic rod 404 can be adjusted according to requirements to ensure that the impact frame 405 is accurately aligned with the test point and to avoid the problem of insufficient impact force due to the short distance.

[0038] Furthermore, the impact hydraulic pump rod 406 and the impact frame 405 are welded together. There are four sets of impact hydraulic pump rods 406, which are arranged in a semi-circular pattern. The impact hydraulic pump rods 406 are servo valve-controlled hydraulic cylinders. When needed, after the impact frame 405 rotates to the appropriate angle, the impact hydraulic pump rods 406 impact the safety helmet body 204. The impact force is sensed by the pressure sensing patch 203. The four sets of impact hydraulic pump rods 406 can perform impact tests on different positions to ensure that all key parts of the safety helmet body 204 are covered.

[0039] Working principle: When needed, first place the test base plate 1 in the required position, then insert the head simulation ball 202 into the placement hole 201, and then put the safety helmet body 204 on the outside of the head simulation ball 202. After preparation, insert the insertion rod 302 into the insertion base 301, and the limiting hydraulic rod 303 pushes the shock-absorbing pad 304 outward until the shock-absorbing pad 304 contacts the surface of the safety helmet body 204. After preparation, the operator controls the driven rotating shaft 402 in the bushing 401 to rotate according to the force position of the safety helmet body 204 to be tested through the handle 403. According to the size of the safety helmet body 204, the telescopic hydraulic rod 404 will control the height of the impact frame 405. Finally, the operator controls the impact hydraulic pump rod 406 to conduct the impact performance test. At this time, the force exerted by the safety helmet body 204 on the head simulation ball 202 will be sensed by the pressure sensing patch 203, thereby achieving the function of the safety helmet impact performance test. This completes the use process of a construction safety helmet impact performance testing machine.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A machine for testing the impact performance of a construction safety helmet, comprising a test bed (1), characterised in that: A helmet force-bearing component (2) is provided on the upper side of the test base plate (1). The helmet force-bearing component (2) includes a mounting hole (201) located at the center of the upper side of the test base plate (1). A head simulation ball (202) is installed inside the mounting hole (201). A pressure-sensitive patch (203) is provided on the surface of the head simulation ball (202). A helmet body (204) is installed on the outer side of the head simulation ball (202). Side fixing components (3) are provided on the left and right sides of the mounting hole (201). A helmet body (204) is provided on the outer side of the mounting hole (201). A helmet impact performance test assembly (4) is provided. The helmet impact performance test assembly (4) includes bushings (401) arranged on the front and rear sides of the mounting hole (201). A driven shaft (402) is installed on the inner side of the bushing (401). A handle (403) is connected to the front side of the driven shaft (402). A telescopic hydraulic rod (404) is installed at the top of the driven shaft (402). An impact frame (405) is connected to the top of the telescopic hydraulic rod (404). An impact hydraulic pump rod (406) is installed on the inner side of the impact frame (405).

2. The impact performance testing machine for a construction safety helmet according to claim 1, wherein The pressure-sensitive patch (203) is adhesively connected to the head simulation ball (202), and the head simulation ball (202) is connected to the helmet body (204) through the pressure-sensitive patch (203). The head simulation ball (202) and the helmet body (204) together form a force detection structure through the pressure-sensitive patch (203).

3. The impact performance testing machine for a construction safety helmet according to claim 1, wherein The lateral fixing assembly (3) includes an insertion base (301) disposed outside the mounting hole (201), and an insertion rod (302) is connected to the inner groove of the insertion base (301). The insertion base (301) and the insertion rod (302) are mirror-symmetrically distributed about the axis of symmetry of the mounting hole (201).

4. The impact performance testing machine for a construction safety helmet according to claim 3, wherein The top inner side of the insertion rod (302) is provided with a limiting hydraulic rod (303), and the end of the limiting hydraulic rod (303) is connected to a shock-absorbing rubber pad (304). The shock-absorbing rubber pad (304) is in contact with the safety helmet body (204), and the shock-absorbing rubber pad (304) forms a telescopic limiting structure through the limiting hydraulic rod (303).

5. The impact performance testing machine for a construction safety helmet according to claim 1, wherein The driven shaft (402) and the bushing (401) are connected by a slot. The driven shaft (402) drives the telescopic hydraulic rod (404) to rotate along the bushing (401) through the handle (403).

6. The impact performance testing machine for a construction safety helmet according to claim 1, wherein The telescopic hydraulic rod (404) and the driven rotating shaft (402) are welded together, and the impact frame (405) and the telescopic hydraulic rod (404) are welded together. The impact frame (405) and the driven rotating shaft (402) form a telescopic structure through the telescopic hydraulic rod (404).

7. The impact performance testing machine for a construction safety helmet according to claim 1, wherein The impact hydraulic pump rod (406) and the impact frame (405) are welded together. There are four sets of impact hydraulic pump rods (406). The impact hydraulic pump rods (406) are arranged in a semi-circular distribution. The impact hydraulic pump rods (406) are servo valve controlled hydraulic cylinders.

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