Buffer performance testing instrument
By using an impact ball and a three-axis acceleration sensor combined with a micro hydraulic cylinder in the anti-fall headgear testing instrument to simulate the human fall process, the problem that existing testing instruments are difficult to accurately evaluate the cushioning performance of anti-fall headgear is solved, and higher test accuracy and consistency are achieved.
Patent Information
- Application Number
- CN202422690974.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-05
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-11-05
AI Technical Summary
Existing anti-fall headgear testing instruments are difficult to simulate the human fall process, resulting in insufficient accuracy and consistency of test results.
A cushioning performance testing instrument was designed. It used an impact ball and a three-axis acceleration sensor combined with a micro hydraulic cylinder to simulate the free fall of a human body. The acceleration change was measured by the impact ball, and the height of the support was adjusted to adapt to the thickness and size of different anti-fall headgear.
The accuracy and consistency of the anti-fall headgear test are improved, the cushioning effect can be reflected more realistically, and the standardization of the test results is enhanced.
Smart Images
Figure CN223376883U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of anti-fall testing instruments, in particular to a buffer performance testing instrument. Background Art
[0002] When babies are learning to walk, they often fall due to their poor stability. In order to prevent injuries to the baby's head during falls, babies are usually given special anti-fall headgear. Anti-fall headgear is an important protective equipment, and testing its anti-fall performance is crucial.
[0003] Existing anti-fall headgear needs to be tested for its anti-fall performance after production. The existing method usually uses a hydraulic press or a pneumatic press to gradually increase the pressure on the headgear for testing. However, it is difficult to simulate the human fall process for testing, which reduces the accuracy of the test results. Therefore, we have launched a new cushioning performance testing instrument. Utility Model Content
[0004] The main purpose of the utility model is to provide a buffer performance testing instrument that can effectively solve the problems in the background technology.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0006] A buffer performance testing instrument includes a connecting seat and a connecting plate, the upper end of the connecting seat is provided with an adjusting groove, the upper left groove wall and the upper right groove wall of the adjusting groove are both provided with sliding grooves, the lower groove wall of the adjusting groove is installed with four micro hydraulic cylinders, the output ends of the four micro hydraulic cylinders are commonly fixedly connected to the adjusting seat, the lower left end and the lower right end of the adjusting seat are both fixedly connected to sliding blocks, the lower left end and the lower right end of the connecting seat are both fixedly connected to mounting bars, the upper end of the adjusting seat is fixedly connected to a support, the middle of the left wall inside the support is fixedly connected to a rotating shaft, the middle of the right end of the support is inserted with a locking screw, the lower left end of the connecting plate is provided with an axial hole, the middle of the upper end of the connecting plate is fixedly connected to a connecting block, and the upper end of the connecting block is fixedly connected to an impact ball.
[0007] Preferably, the lower portion of the adjustment seat is located in the adjustment groove, and the two sliding blocks are slidably connected to the two sliding grooves respectively.
[0008] By adopting the above technical solution, the adjustment seat can be raised and lowered in the vertical direction.
[0009] Preferably, the rotating shaft is movably connected to the shaft hole through insertion.
[0010] By adopting the above technical solution, the connecting plate can be made to rotate and fall freely with the impact ball.
[0011] Preferably, the end of the locking screw fits tightly against the right end of the connecting plate.
[0012] By adopting the above technical solution, the connection plate can be limited.
[0013] Preferably, the inner center of the impact ball contains a three-axis acceleration sensor.
[0014] By adopting the above technical solution: the acceleration change of the sample during movement is measured by a three-axis acceleration sensor, and the change characteristics of the acceleration can reflect the quality of the buffering effect.
[0015] Preferably, the impact ball has a mass of 2 ± 0.05 kg, and the mass includes the mass of the sensor and all fasteners in the ball, and is a hard plastic ball with a diameter of 160 ± 5 mm.
[0016] By adopting the above technical solution: wearing the anti-fall headgear on the impact ball, and simulating the free fall of a human body through the collision of the impact ball with the ground, the accuracy of the test results can be improved.
[0017] Compared with the prior art, the present invention has the following beneficial effects:
[0018] 1. An impact ball is set above the connecting plate. The center of the impact ball contains a three-axis acceleration sensor. The impact ball has a mass of 2 ± 0.05 kg, and the mass includes the mass of the sensor and all fasteners in the ball. The diameter is 160 ± 5 mm. The anti-fall headgear to be tested is worn on the impact ball. The tightness ensures that the product does not move visible to the naked eye during the impact. The connecting plate is adjusted to a vertical position. Keep the human body in standing mode. Loosen the locking screw and let the impact ball and the anti-fall headgear rotate freely and fall to hit the flat concrete floor. The acceleration change of the sample during the movement can be measured by the three-axis acceleration sensor. The change characteristics of the acceleration can reflect the quality of the cushioning effect. The entire test instrument simulates the free fall of the human body, which can improve the accuracy of the test results.
[0019] 2. A connecting seat is provided below the support, and four micro hydraulic cylinders are provided inside the connecting seat. By starting the four micro hydraulic cylinders, the four micro hydraulic cylinders push the adjustment seat up and down, so that the height of the support can be easily adjusted. Since the types of anti-fall headgear tested are various, resulting in different thicknesses and sizes, the height between the support and the ground can be adjusted. When the connecting plate is in a horizontal position, the sample under test can touch the ground with the impact ball, which can improve the standardization and consistency of the test. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 This is a schematic diagram of the overall structure of a buffer performance testing instrument of the present utility model;
[0021] Figure 2 This is a schematic diagram of the planar structure of a buffer performance testing instrument of the present utility model;
[0022] Figure 3 This is a schematic diagram of the disassembled structure of a buffer performance testing instrument of the present utility model;
[0023] Figure 4 The figure is a schematic diagram of the internal structure of a connecting seat of a buffer performance testing instrument of the present invention.
[0024] In the figure: 1. Connecting seat; 2. Connecting plate; 3. Adjusting groove; 4. Slide groove; 5. Micro hydraulic cylinder; 6. Adjusting seat; 7. Slider; 8. Mounting bar; 9. Support; 10. Rotating shaft; 11. Locking screw; 12. Shaft hole; 13. Connecting block; 14. Impact ball. DETAILED DESCRIPTION
[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.
[0026] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0027] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.
[0028] See also Figure 1-4 , the utility model provides a technical solution:
[0029] A buffering performance testing instrument includes a connecting seat 1 and a connecting plate 2. An adjusting groove 3 is opened at the upper end of the connecting seat 1. A slide groove 4 is opened on the upper left and right groove walls of the adjusting groove 3. Four micro hydraulic cylinders 5 are installed on the lower groove wall of the adjusting groove 3. The output ends of the four micro hydraulic cylinders 5 are fixedly connected to an adjusting seat 6. The lower left and right ends of the adjusting seat 6 are fixedly connected to a slider 7. The lower left and right ends of the connecting seat 1 are fixedly connected to a mounting bar 8. The upper end of the adjusting seat 6 is fixedly connected to a support 9. The middle part of the left wall of the support 9 is fixedly connected to a rotating shaft 10. The middle part of the right end of the support 9 is interspersed with a locking screw 11. The lower left end of the connecting plate 2 is opened with an axial hole 12. The middle part of the upper end of the connecting plate 2 is fixedly connected to a connecting block 13. The upper end of the connecting block 13 is fixedly connected to an impact ball 14.
[0030] In this embodiment, the lower part of the adjustment seat 6 is located in the adjustment groove 3, the two sliders 7 are slidingly connected to the two slide grooves 4 respectively, the rotating shaft 10 is movably connected with the shaft hole 12, and the end of the locking screw 11 is tightly fitted with the right end of the connecting plate 2.
[0031] Through the above scheme: by setting a connecting seat 1 below the support 9, four micro hydraulic cylinders 5 are set inside the connecting seat 1, and by starting the four micro hydraulic cylinders 5, the four micro hydraulic cylinders 5 push the adjustment seat 6 to move up and down, so that the height of the support 9 can be easily adjusted. Since the types of anti-fall headgear tested are various, resulting in different thicknesses and sizes, the height of the support 9 and the ground can be adjusted. When the connecting plate 2 is in a horizontal position, the sample to be tested can contact the ground with the impact ball 14, which can improve the standardization and consistency of the test.
[0032] In this embodiment, the impact ball 14 contains a three-axis acceleration sensor at the center. The impact ball 14 has a mass of 2±0.05 kg, and the mass includes the mass of the sensor and all fasteners inside the ball. It is a hard plastic ball with a diameter of 160±5 mm.
[0033] Through the above scheme: by setting an impact ball 14 above the connecting plate 2, the center of the impact ball 14 contains a three-axis acceleration sensor, the impact ball 14 has a mass of 2 ± 0.05 kg and the mass includes the mass of the sensor and all fasteners in the ball, and is a hard plastic ball with a diameter of 160 ± 5 mm. The anti-fall head guard to be tested is worn on the impact ball 14, and the tightness ensures that the product does not undergo visible displacement during the impact process. The connecting plate 2 is adjusted to a vertical position, the human body is kept in a standing mode, the locking screw 11 is loosened, and the impact ball 14 is allowed to rotate freely with the anti-fall head guard and fall to hit the flat concrete floor. The acceleration change of the sample during the movement can be measured by the three-axis acceleration sensor, and the acceleration change characteristics can reflect the quality of the buffering effect. The entire testing instrument simulates the free fall of the human body, which can improve the accuracy of the test results.
[0034] It should be noted that the present invention is a buffer performance testing instrument. During use, a connecting seat 1 is provided below the support 9. Four micro hydraulic cylinders 5 are arranged inside the connecting seat 1. When the four micro hydraulic cylinders 5 are activated, they will push the adjustment seat 6 to move up and down, so that the height of the support 9 can be easily adjusted. Taking into account the various types of anti-fall headgear to be tested, their thicknesses and sizes are also different. Therefore, by adjusting the height of the support 9 and the ground, it can be ensured that when the connecting plate 2 is in a horizontal position, the sample to be tested can smoothly contact the ground with the impact ball 14, which can improve the standardization and consistency of the test. An impact ball 14 is provided above the connecting plate 2. A three-axis acceleration sensor is built into the center of the impact ball 14. The mass of the impact ball 14 A hard plastic ball with a diameter of 160±5mm and a mass of 2±0.05kg, and its mass includes the mass of the sensor and all fasteners in the ball. The anti-fall headgear to be tested is worn on the impact ball 14, and make sure that its tightness is moderate to ensure that the product will not have visible displacement during the impact. Adjust the connecting plate 2 to the vertical position to simulate the human standing mode. Then, loosen the locking screw 11 and let the impact ball 14 with the anti-fall headgear rotate freely and fall, hitting the flat concrete floor. The three-axis acceleration sensor in the center of the impact ball 14 can be used to measure the acceleration change of the sample during the movement, and the acceleration change characteristics can reflect the quality of the buffering effect. The entire test instrument simulates the process of human free fall, which can improve the accuracy of the test results.
[0035] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.
Claims
1. A buffer performance testing instrument, comprising a connecting seat (1) and a connecting plate (2), characterized in that: An adjusting groove (3) is provided at the upper end of the connecting seat (1), and a sliding groove (4) is provided at the upper left and right groove walls of the adjusting groove (3). Four micro hydraulic cylinders (5) are installed at the lower groove wall of the adjusting groove (3), and the output ends of the four micro hydraulic cylinders (5) are fixedly connected to an adjusting seat (6). The lower left and right ends of the adjusting seat (6) are fixedly connected to a sliding block (7). The lower left and right ends of the connecting seat (1) are fixedly connected to the adjusting seat (6). A mounting strip (8) is fixedly connected to the upper end of the adjustment seat (6), a support (9) is fixedly connected to the middle of the left wall of the support (9), a rotating shaft (10) is fixedly connected to the middle of the right end of the support (9), a locking screw (11) is inserted and connected, an axial hole (12) is opened at the lower part of the left end of the connecting plate (2), a connecting block (13) is fixedly connected to the middle of the upper end of the connecting plate (2), and an impact ball (14) is fixedly connected to the upper end of the connecting block (13).
2. A buffer performance testing instrument according to claim 1, characterized in that: The lower portion of the adjustment seat (6) is located in the adjustment groove (3), and the two sliding blocks (7) are respectively slidably connected to the two sliding grooves (4).
3. A buffer performance testing instrument according to claim 1, characterized in that: The rotating shaft (10) and the shaft hole (12) are interpenetratingly and movably connected.
4. A buffer performance testing instrument according to claim 1, characterized in that: The end of the locking screw (11) is tightly fitted to the right end of the connecting plate (2).
5. The buffer performance testing instrument according to claim 1, characterized in that: The center of the impact ball (14) contains a three-axis acceleration sensor.
6. The buffer performance testing instrument according to claim 1, characterized in that: The impact ball (14) has a mass of 2 ± 0.05 kg and the mass includes the mass of the sensor and all fasteners in the ball, and is a hard plastic ball with a diameter of 160 ± 5 mm.