Impact device for safety helmet testing

Abstract

The application relates to the technical field of safety helmets, in particular to an impact device for safety helmet testing, which aims to solve the problem that it is inconvenient to switch the impact head during testing, and comprises a base, two vertical plates fixedly installed on the upper surface of the base, a sliding rod fixedly installed on the upper surface of the base, a folding assembly arranged above the base, an impact assembly arranged above the base, and a positioning assembly arranged outside the impact assembly. Through cooperation of a motor, a rotating wheel and a steel wire rope, the impact assembly can move downwards, the impact head can move downwards, the safety helmet can be impacted, the clamping ring can be rotated through the spring, the arc-shaped plate and the positioning block, the clamping ring can drive the rotating shaft and the triangular plate to rotate, the triangular plate can drive the pressure sensor, the conical head, the circular head and the square head to switch, so that the device can simulate different falling objects when the safety helmet is tested, and the precision of the safety helmet impact test is improved.

Description

Technical Field

[0001] This application relates to the field of helmet testing technology, and in particular to impact equipment for helmet testing. Background Technology

[0002] Safety helmets are suitable for general workplaces and have basic protective performance, which can protect against injuries caused by falling objects and other specific factors. In order to test the safety of safety helmets, they need to be tested. Safety helmet tests are usually to ensure that the safety helmet can protect the user's head under various conditions and avoid injury caused by accidental collisions or falls.

[0003] Existing helmet impact testing equipment includes a frame, slider, turntable, head mold, guide post, and electromagnetic rail assembly. It uses the electromagnetic rail to drive an impactor to fall and test the helmet. However, due to the diverse environments where helmets are used, the shape, size, and mass of objects falling from heights can vary greatly. Existing testing equipment struggles to switch impact heads during testing, making it difficult to simulate the impact of different falling objects and thus affecting the effectiveness of helmet impact tests. Therefore, improvements are needed. Utility Model Content

[0004] To improve the ease of replacing the impact head, this application provides an impact device for testing safety helmets.

[0005] The impact testing equipment for safety helmets provided in this application adopts the following technical solution:

[0006] An impact device for testing safety helmets includes a base, two upright plates fixedly mounted on the upper surface of the base, a sliding rod fixedly mounted on the upper surface of the base, a retractable assembly above the base, an impact assembly above the base, and a positioning assembly outside the impact assembly.

[0007] Optionally, the retraction assembly includes a housing mounted on the upper surface of two upright plates. A motor is fixedly mounted on the inner side wall of the housing. A rotating rod is fixedly mounted on the output end of the motor. A rotating wheel is fixedly mounted on the outer surface of the rotating rod. A steel wire rope is fixedly mounted on the outer surface of the rotating wheel. An opening is provided on the bottom surface of the housing, and the bottom end of the steel wire rope extends below the opening.

[0008] Optionally, the impact assembly includes a horizontal plate slidably mounted on the outer surfaces of two sliding rods. Two connecting strips are fixedly mounted on both the front and back sides of the horizontal plate. A bracket is fixedly mounted on the side of the two sets of connecting strips that are close to each other. Two rotating shafts are rotatably mounted inside the bracket via two bearings. A triangular plate is fixedly mounted on the side of the two rotating shafts that are close to each other. A set of pressure sensors is fixedly mounted on the outer surface of the triangular plate. A round head, a conical head, and a square head are fixedly mounted on the side of the set of pressure sensors that are far from each other. Two sliding grooves are formed on the upper surface of the horizontal plate and the upper surface of the bracket.

[0009] Optionally, the positioning assembly includes two sliding plates slidably mounted on the inner walls of two sets of sliding grooves. An arc-shaped plate is fixedly mounted on the bottom surface of each sliding plate, and a spring is fixedly mounted on the upper surface of each arc-shaped plate. The top end of each spring is fixedly mounted to the bottom surface of the bracket. Two positioning blocks are fixedly mounted on the bottom surface of each arc-shaped plate. A retaining ring is fixedly mounted on the outer surface of each rotating shaft. The two sets of retaining rings respectively engage with the two positioning blocks. A set of perforated retaining blocks is fixedly mounted on the side of each of the two retaining rings that is far apart from each other. Two insert rods are slidably mounted on the inner walls of the two perforated retaining blocks. The side of each of the two insert rods that is close to each other is fixedly mounted to the side of each of the two arc-shaped plates that is far apart from each other.

[0010] By adopting the above technical solution, the spring can push the arc plate downward to move downward, so that the arc plate can cooperate with the retaining ring to limit the rotating shaft, and after the rotating shaft rotates to switch the impact component, the impact component is positioned.

[0011] Optionally, a support block is fixedly installed on the upper surface of the base, and a positioning column is fixedly installed on the upper surface of the support block.

[0012] Optionally, two limiting rings are fixedly installed on the outer surface of the rotating rod, and the two limiting rings are fixedly installed on the left and right sides of the rotating wheel respectively on their sides that are close to each other.

[0013] By adopting the above technical solution, the limiting ring limits the rotation wheel, so that the rotation wheel can remain stable and prevent the rotation wheel from slipping.

[0014] Optionally, two limiting blocks are provided above the base, and the bottom surfaces of the two limiting blocks are fixedly installed to the upper surfaces of the two slides respectively.

[0015] Optionally, a control panel is fixedly installed on the right side of one of the uprights, and an L-shaped plate is slidably installed on the outer surface of each of the slide bars.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] 1. By using a motor, a rotating wheel, and a steel wire rope, the impact assembly can move downwards, allowing the impact head to move downwards and impact the safety helmet. Furthermore, by using a spring, an arc-shaped plate, and a positioning block, the retaining ring can be released and rotated, which in turn drives the rotating shaft and triangular plate to rotate. This allows the triangular plate to switch between a pressure sensor, a conical head, a round head, and a square head, thus enabling the device to simulate different falling objects during safety helmet testing and improving the accuracy of safety helmet impact testing.

[0018] 2. The spring can push the arc plate downwards, allowing the arc plate to work with the retaining ring to limit the rotation of the shaft, thus positioning the impact component after the shaft rotates and switches the impact assembly. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the impact device for testing safety helmets according to an embodiment of this application.

[0020] Figure 2 This is a schematic diagram of the structure of the receiving and extending component in an embodiment of this application.

[0021] Figure 3 This is a schematic diagram of the structure of the impact component in an embodiment of this application.

[0022] Figure 4 This is a schematic diagram of the positioning component in an embodiment of this application.

[0023] Explanation of reference numerals in the attached drawings: 1. Base; 101. Vertical plate; 102. Slide rod; 103. Control panel; 2. Impact assembly; 201. Horizontal plate; 202. Connecting strip; 203. Bracket; 204. Slide groove; 205. Triangular plate; 206. Conical head; 207. Circular head; 208. Pressure sensor; 209. Square head; 210. Rotating shaft; 3. Retraction assembly; 301. Housing; 302. Motor; 303. Steel wire rope; 304. Rotating rod; 305. Rotating wheel; 306. Limiting ring; 307. Through port; 4. Positioning assembly; 401. Slide plate; 402. Arc plate; 403. Positioning block; 404. Insert rod; 405. Perforated locking block; 406. Locking ring; 407. Spring; 408. Limiting block; 5. Support block; 501. Positioning column; 6. L-shaped plate. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0025] This application discloses an impact device for testing safety helmets. (Refer to...) Figure 1The impact device for testing safety helmets includes a base 1, two upright plates 101 are fixedly installed on the upper surface of the base 1, a slide bar 102 is fixedly installed on the upper surface of the base 1, a retractable assembly 3 is provided above the base 1, an impact assembly 2 is provided above the base 1, and a positioning assembly 4 is provided outside the impact assembly 2.

[0026] Reference Figure 2 The retraction and extension assembly 3 includes a housing 301 mounted on the upper surface of two upright plates 101. A motor 302 is fixedly mounted on the inner side wall of the housing 301. A rotating rod 304 is fixedly mounted on the output end of the motor 302. A rotating wheel 305 is fixedly mounted on the outer surface of the rotating rod 304. A steel wire rope 303 is fixedly mounted on the outer surface of the rotating wheel 305. An opening 307 is provided on the bottom surface of the housing 301. The bottom end of the steel wire rope 303 extends to below the opening 307. By cooperating with the motor 302, the rotating rod 304 and the rotating wheel 305, the steel wire rope 303 can be controlled to retract and extend.

[0027] Reference Figure 3 The impact assembly 2 includes a horizontal plate 201 slidably mounted on the outer surface of two slide rods 102. Two connecting strips 202 are fixedly mounted on the front and back of the horizontal plate 201. A bracket 203 is fixedly mounted on the side of the two sets of connecting strips 202 that are close to each other. Two rotating shafts 210 are rotatably mounted inside the bracket 203 through two bearings. A triangular plate 205 is fixedly mounted on the side of the two rotating shafts 210 that are close to each other. A set of pressure sensors 208 is fixedly mounted on the outer surface of the triangular plate 205. A round head 207, a conical head 206, and a square head 209 are fixedly mounted on the side of the set of pressure sensors 208 that are far from each other. Two sliding grooves 204 are opened on the upper surface of the horizontal plate 201 and the upper surface of the bracket 203. With the cooperation of the bracket 203 and the horizontal plate 201, the horizontal plate 201 and the bracket 203 can move up and down along the slide rods 102, so that the impact assembly 2 can perform an impact test on the safety helmet below.

[0028] Reference Figure 4The positioning component 4 includes two sliding plates 401 slidably mounted on the inner walls of two sets of sliding grooves 204. An arc-shaped plate 402 is fixedly mounted on the bottom surface of each sliding plate 401. A spring 407 is fixedly mounted on the upper surface of each arc-shaped plate 402. The top end of each spring 407 is fixedly mounted to the bottom surface of the bracket 203. Two positioning blocks 403 are fixedly mounted on the bottom surface of each arc-shaped plate 402. A retaining ring 406 is fixedly mounted on the outer surface of each rotating shaft 210. The two sets of retaining rings 406 respectively engage with the two positioning blocks 403. A set of perforated locking blocks 405 are fixedly installed on the opposite sides of the retaining ring 406. Two insert rods 404 are slidably installed on the inner walls of the two perforated locking blocks 405. The opposite sides of the two insert rods 404 are fixedly installed on the opposite sides of the two arc plates 402. The arc plates 402 can be pushed downward by the spring 407, so that the arc plates 402 can cooperate with the retaining ring 406 to limit the rotation shaft 210. After the rotation shaft 210 rotates to switch the impact component 2, the impact component 2 is positioned.

[0029] Reference Figure 1 A support block 5 is fixedly installed on the upper surface of the base 1, and a positioning column 501 is fixedly installed on the upper surface of the support block 5. The safety helmet can be positioned by the support block 5 and the positioning column 501 so that the safety helmet can be subjected to impact testing.

[0030] Reference Figure 2 Two limiting rings 306 are fixedly installed on the outer surface of the rotating rod 304. The two limiting rings 306 are fixedly installed on the left and right sides of the rotating wheel 305 respectively. By providing the limiting rings 306, the rotating wheel 305 can be limited, so that the rotating wheel 305 can remain stable and prevent the rotating wheel 305 from sliding.

[0031] Reference Figure 4 Two limiting blocks 408 are provided above the base 1. The bottom surface of the two limiting blocks 408 is fixedly installed on the upper surface of the two slides 401 respectively. The limiting blocks 408 can limit the slides 401 to prevent them from slipping.

[0032] Reference Figure 1 One of the upright plates 101 has a control panel 103 fixedly installed on its right side. Each slide bar 102 has an L-shaped plate 6 slidably installed on its outer surface. The L-shaped plate 6 can guide the impact assembly 2, causing the impact assembly 2 to shake.

[0033] The implementation principle of the impact device for testing safety helmets in this embodiment is as follows: During use, the safety helmet is placed on the positioning post 501. Then, as needed, the sliding plate 401 is pulled upwards, causing the sliding plate 401 to move the arc-shaped plate 402 downwards. This causes the positioning block 403 to move out of the retaining ring 406, allowing the retaining ring 406 to rotate the rotating shaft 210. The rotating shaft 210 then rotates the triangular plate 205, causing the triangular plate 205 to switch between a circular head 207, a conical head 206, and a square head 209. Afterwards, the sliding plate 401 is released, causing the sliding plate 401 to push the arc-shaped plate 402 downwards via the spring 407, causing the arc-shaped plate 402 to engage with the retaining ring 406. 6. This allows the retaining ring 406 to limit the rotation shaft 210. Then, the motor 302 is started, causing the motor 302 to drive the rotating wheel 305 to rotate. As the rotating wheel 305 rotates, it can drive the wire rope 303 to wind up, causing the impact component 2 to move upward. Then, the motor 302 is reversed, causing the rotating wheel 305 to control the wire rope 303 to unwind, causing the impact component 2 to move downward and impact the safety helmet, thus enabling the safety helmet to complete the impact test. During the test, the pressure sensor 208 can detect the pressure during the impact, and the data can be displayed on the control panel 103 so that the staff can record the test data.

[0034] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An impact testing device for safety helmets, comprising a base (1), characterized in that: Two upright plates (101) are fixedly installed on the upper surface of the base (1), a slide rod (102) is fixedly installed on the upper surface of the base (1), a take-up and release assembly (3) is provided above the base (1), an impact assembly (2) is provided above the base (1), and a positioning assembly (4) is provided outside the impact assembly (2).

2. The impact device for testing safety helmets according to claim 1, characterized in that: The retractable assembly (3) includes a housing (301) mounted on the upper surface of two upright plates (101). A motor (302) is fixedly mounted on the inner side wall of the housing (301). A rotating rod (304) is fixedly mounted on the output end of the motor (302). A rotating wheel (305) is fixedly mounted on the outer surface of the rotating rod (304). A wire rope (303) is fixedly mounted on the outer surface of the rotating wheel (305). An opening (307) is provided on the bottom surface of the housing (301). The bottom end of the wire rope (303) extends to the bottom of the opening (307).

3. The impact testing device for safety helmets according to claim 1, characterized in that: The impact assembly (2) includes a horizontal plate (201) with two sliding rods (102) slidably mounted on the outer surface. Two connecting strips (202) are fixedly mounted on the front and back of the horizontal plate (201). A bracket (203) is fixedly mounted on the side of the two sets of connecting strips (202) that are close to each other. Two rotating shafts (210) are rotatably mounted inside the bracket (203) through two bearings. A triangular plate (205) is fixedly mounted on the side of the two rotating shafts (210) that are close to each other. A set of pressure sensors (208) is fixedly mounted on the outer surface of the triangular plate (205). A round head (207), a conical head (206), and a square head (209) are fixedly mounted on the side of the set of pressure sensors (208) that are far apart from each other. Two grooves (204) are opened on the upper surface of the horizontal plate (201) and the upper surface of the bracket (203).

4. The impact device for testing safety helmets according to claim 3, characterized in that: The positioning component (4) includes two sliding plates (401) slidably mounted on the inner walls of two sets of sliding grooves (204). An arc-shaped plate (402) is fixedly mounted on the bottom surface of each sliding plate (401). A spring (407) is fixedly mounted on the upper surface of each arc-shaped plate (402). The top end of each spring (407) is fixedly mounted to the bottom surface of a bracket (203). Two positioning blocks (403) are fixedly mounted on the bottom surface of each arc-shaped plate (402). The outer surface of the shaft (210) is fixedly equipped with retaining rings (406). The two sets of retaining rings (406) are respectively engaged with two positioning blocks (403). A set of perforated blocks (405) is fixedly installed on the side of the two retaining rings (406) that are far apart from each other. Two insert rods (404) are slidably installed on the inner wall of the two perforated blocks (405). The side of the two insert rods (404) that are close to each other is fixedly installed with the side of the two arc plates (402) that are far apart from each other.

5. The impact device for testing safety helmets according to claim 1, characterized in that: A support block (5) is fixedly installed on the upper surface of the base (1), and a positioning column (501) is fixedly installed on the upper surface of the support block (5).

6. The impact device for testing safety helmets according to claim 2, characterized in that: Two limiting rings (306) are fixedly installed on the outer surface of the rotating rod (304), and the two limiting rings (306) are fixedly installed on the left and right sides of the rotating wheel (305) respectively on their sides that are close to each other.

7. The impact device for testing safety helmets according to claim 4, characterized in that: Two limiting blocks (408) are provided above the base (1), and the bottom surfaces of the two limiting blocks (408) are fixedly installed on the upper surfaces of the two sliding plates (401).

8. The impact device for testing safety helmets according to claim 1, characterized in that: A control panel (103) is fixedly installed on the right side of one of the uprights (101), and an L-shaped plate (6) is slidably installed on the outer surface of each of the slide bars (102).

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