Airbag cloth friction coefficient testing device

Abstract

The utility model discloses a device for testing the friction coefficient of air bag cloth. The device comprises a test board, a movable arm, a friction block and a clamping block, supporting rods are vertically arranged at the two ends of one side of the top of the testing table and penetrate through guide holes in the two sides of the clamping block, the clamping block is installed on one side of the top of the testing table in a liftable mode through sliding fit between the guide holes and the supporting rods, and a first sliding groove extending in the horizontal direction is formed in the rear side of the testing table. The bottom end of the movable arm is movably installed in the first sliding groove through a sliding connection structure, a second sliding groove extending in the vertical direction is formed in the upper portion of the front wall of the movable arm, a sliding block is slidably installed in the second sliding groove, and a lifting arm is fixedly installed at the front end of the sliding block. According to the utility model, by controlling the motion trails of the movable arm, the lifting arm and the friction block, seamless switching between precise positioning and bidirectional friction testing of a test part can be realized, operation errors and efficiency loss caused by manual adjustment are avoided, and the test efficiency and the data reliability are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of airbag testing technology, and in particular to an airbag fabric friction coefficient testing device. Background Technology

[0002] In automotive safety systems, airbag fabric is a key component of airbags, and its frictional properties directly affect the smoothness and reliability of airbag deployment, thus impacting the safety of passengers. Therefore, accurately testing the coefficient of friction of airbag fabric is a crucial step in ensuring product quality.

[0003] Currently, existing airbag fabric friction coefficient testing equipment on the market generally has many limitations. In terms of operation procedures, traditional testing devices mostly rely on manual adjustment of the position of the test components, which is not only cumbersome to operate, but also difficult to ensure the consistency of test conditions each time, resulting in long test cycles and low efficiency. When conducting bidirectional friction tests, operators need to manually disassemble and reinstall the friction blocks and adjust their movement direction. This process is not only time-consuming and labor-intensive, but also prone to errors due to improper human operation.

[0004] Therefore, how to provide a device for testing the friction coefficient of airbag fabric is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] One objective of this invention is to provide a device for testing the friction coefficient of airbag fabric. This invention can achieve precise positioning of the test components and seamless switching between bidirectional friction testing by controlling the movement trajectory of the movable arm, lifting arm and friction block, avoiding operational errors and efficiency losses caused by manual adjustment, and significantly improving testing efficiency and data reliability.

[0006] An airbag fabric friction coefficient testing device according to an embodiment of the present invention includes a testing platform, a movable arm, a friction block, and a clamping block;

[0007] The test platform has vertically arranged support rods at both ends on one side of the top. The support rods pass through guide holes on both sides of the clamping block. The clamping block can be raised and lowered on one side of the top of the test platform through the sliding cooperation between the guide holes and the support rods. The test platform has a first sliding groove extending horizontally on the rear side. The bottom end of the movable arm is movably installed in the first sliding groove through a sliding connection structure. The movable arm has a second sliding groove extending vertically above the front wall of the movable arm. A slider is slidably installed in the second sliding groove. A lifting arm is fixedly installed at the front end of the slider.

[0008] A circular mounting base is fixedly installed at the front end of the lifting arm. A turntable is rotatably installed in the circular mounting base through a bearing. A force sensor is embedded inside the turntable. A connecting rod is fixedly connected to one side of the turntable at an eccentric position. One end of the connecting rod is fixedly connected to the sensing end of the force sensor. The other end of the connecting rod has a vertical through-hole.

[0009] A bracket is fixedly installed on one side of the top of the friction block. A pin adapted to the insertion hole is fixedly installed on the top of the bracket. The pin can be inserted into the insertion hole to realize the detachable connection between the friction block and the connecting rod. Sleeves are symmetrically fixedly installed on the outer walls of the front and rear sides of the friction block. Inner rods are movably installed on both sides of the inner sleeves in the horizontal direction. Clamping plates for holding the airbag cloth are fixedly installed on the outer ends of the inner rods and on both sides of the friction block.

[0010] Furthermore, a support is fixedly installed on the top of the lifting arm, and a servo motor is fixedly installed on the top of the support and directly above the turntable. The transmission shaft at the bottom of the servo motor is fixedly connected to the connection hole at the center of the turntable to drive the turntable to rotate at a constant speed around its axis.

[0011] Furthermore, an electric push rod is fixedly installed at the top of the movable arm, and the bottom telescopic end of the electric push rod is inserted through the second slide groove and fixedly connected to the top of the slider, so as to drive the slider to slide up and down along the second slide groove through the telescopic movement of the electric push rod.

[0012] Furthermore, a stepper motor is fixedly installed on one side of the inner wall of the first slide groove. The output shaft of the stepper motor is connected to a lead screw through a coupling. The lead screw is rotatably installed in the first slide groove and passes through a threaded hole at the bottom of the movable arm and is threadedly engaged with the threaded hole.

[0013] Furthermore, a tension spring is fitted on the inner rod, and slots adapted to the clamping plate are opened on the outer walls of both sides of the friction block. When the clamping plate clamps the airbag fabric, it is inserted into the slot to restrict the movement trajectory of the clamping plate.

[0014] Furthermore, a thrust spring is fitted on the top of the clamping block and on the support rod, with the bottom end of the thrust spring fixedly connected to the top of the clamping block and the top end fixedly connected to the support rod. A handle is fixedly installed in the center of the top of the clamping block.

[0015] Furthermore, the mating surfaces of the pin and the socket are provided with anti-slip textures to enhance the stability of the connection between the friction block and the connecting rod.

[0016] Furthermore, the movable arm, lifting arm, and connecting rod are all made of aluminum alloy and have an anti-rust coating on the surface to improve the durability and corrosion resistance of the device.

[0017] The beneficial effects of this utility model are:

[0018] 1. In this utility model, the electric control system links the electric push rod and the servo motor, which can automatically perform a continuous action of lifting-rotating-resetting. It can automatically and seamlessly switch the movement of the friction block from right to left to left to right, realizing rapid reverse secondary testing. Compared with the process of manually adjusting the position of the friction block and recalibrating the test parameters, the single test cycle can be effectively shortened.

[0019] 2. In this utility model, the clamping plates on both sides of the friction block form an elastic clamping assembly through a sleeve, an inner rod, and a tension spring. The design of the clamping plates embedded in the slot further restricts the lateral displacement of the airbag cloth. Combined with the detachable connection structure of the anti-slip pin, it enables the quick clamping and replacement of test samples, significantly improving the operating efficiency. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of an airbag fabric friction coefficient testing device proposed in this utility model;

[0022] Figure 2 This is a disassembly diagram of the friction block of an airbag fabric friction coefficient testing device proposed in this utility model;

[0023] Figure 3 This is a rear view of an airbag fabric friction coefficient testing device proposed in this utility model;

[0024] Figure 4 This is a connection diagram of the friction block and clamping plate of an airbag fabric friction coefficient testing device proposed in this utility model.

[0025] In the diagram: 1. Test platform; 2. Movable arm; 3. Friction block; 4. Lifting arm; 5. Slider; 6. Second slide rail; 7. Electric push rod; 8. Circular mounting base; 9. Turntable; 10. Connecting rod; 11. Support; 12. Servo motor; 13. Slot; 14. Support rod; 15. Clamping block; 16. Handle; 17. Insertion hole; 18. Bracket; 19. Pin; 20. First slide rail; 21. Stepper motor; 22. Lead screw; 23. Sleeve; 24. Inner rod; 25. Tension spring; 26. Clamping plate. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0027] Please see Figure 1-4 A device for testing the coefficient of friction of airbag fabric includes a test platform 1, a movable arm 2, a friction block 3, and a clamping block 15.

[0028] The test bench 1 has vertical support rods 14 installed at both ends on one side of the top. The support rods 14 pass through the guide holes on both sides of the clamping block 15, so that the clamping block 15 can be raised and lowered through the sliding cooperation between the guide holes and the support rods 14.

[0029] A thrust spring is fitted on the top of the clamping block 15. The bottom end of the spring is fixed to the top of the clamping block 15, and the top end is fixed to the support rod 14. The elasticity of the spring provides buffering and restoring force for the clamping block 15.

[0030] Meanwhile, a handle 16 is installed in the center of the top of the clamping block 15, which facilitates manual adjustment of the height of the clamping block 15 to meet the initial height adjustment needs in different testing scenarios.

[0031] Please see Figure 1-4 The bottom end of the movable arm 2 is installed in the first slide groove 20 on the rear side of the test bench 1 through a sliding connection structure.

[0032] A stepper motor 21 is installed on one side of the inner wall of the first slide groove 20. Its output shaft is connected to a lead screw 22 through a coupling. The lead screw 22 is rotatably installed in the first slide groove 20 and passes through the threaded hole at the bottom of the movable arm 2 and is threadedly engaged with the threaded hole.

[0033] When the stepper motor 21 is working, it drives the lead screw 22 to rotate, and through the threaded transmission, the movable arm 2 slides horizontally along the first slide groove 20, thereby realizing the precise movement of the movable arm 2 in the horizontal direction.

[0034] A second vertically extending groove 6 is provided above the front wall of the movable arm 2, and a slider 5 is slidably installed in the second groove 6.

[0035] An electric push rod 7 is installed at the top of the movable arm 2, and its bottom telescopic end passes through the second slide groove 6 and is fixedly connected to the top of the slider 5.

[0036] The telescopic movement of the electric push rod 7 can drive the slider 5 to slide up and down along the second slide groove 6, thereby driving the lifting arm 4 connected to the slider 5 to move in the vertical direction, so as to achieve precise adjustment of the height position of the friction block 3.

[0037] Please see Figure 1-4 The lifting arm 4 has a fixed circular mounting base 8 at its front end. The circular mounting base 8 has a rotating turntable 9 mounted inside via a bearing. The turntable 9 has a force sensor embedded inside to detect force signals during the friction process.

[0038] A connecting rod 10 is fixed at an eccentric position on one side of the turntable 9. One end of the connecting rod 10 is fixed to the sensing end of the force sensor, and the other end has a vertically opened insertion hole 17.

[0039] A pin 19 is installed at the top of the bracket 18 on one side of the friction block 3. The pin 19 is compatible with the socket 17, and the mating surface is provided with anti-slip texture to enhance the connection stability and realize the detachable connection between the friction block 3 and the connecting rod 10, which facilitates the replacement and maintenance of the friction block 3.

[0040] Sleeves 23 are symmetrically installed on the outer walls of the front and rear sides of the friction block 3. Inner rods 24 are horizontally and movably installed on both sides inside the sleeves 23. The outer ends of the inner rods 24 are fixed with clamping plates 26 on both sides of the friction block 3 to hold the airbag fabric.

[0041] A tension spring 25 is fitted onto the inner rod 24 to provide clamping force, enabling the clamping plate 26 to tightly clamp the airbag fabric.

[0042] Meanwhile, grooves 13 adapted to clamping plates 26 are opened on the outer walls of both sides of friction block 3. When clamping airbag cloth, clamping plates 26 are inserted into grooves 13 to restrict its movement trajectory, ensuring that airbag cloth is stably clamped during the test and avoiding displacement.

[0043] Please see Figure 1-4 A support 11 is installed on the top of the lifting arm 4. A servo motor 12 is installed on the top of the support 11 directly above the turntable 9. The bottom drive shaft of the motor is fixedly connected to the connection hole at the center of the turntable 9.

[0044] The servo motor 12 can drive the turntable 9 to rotate at a constant speed around its axis, thereby driving the connecting rod 10 and the friction block 3 to rotate, realizing the rotation action required during the friction test.

[0045] It should be noted that the movable arm 2, lifting arm 4 and connecting rod 10 are all made of aluminum alloy and have an anti-rust coating on the surface, which effectively improves the durability and corrosion resistance of the device, extends the service life of the device, and adapts to testing work in different environments.

[0046] Working principle: During testing, firstly, the clamping block 15 is moved upward by pulling the handle 16. Then, the airbag is placed below the clamping block 15, and the handle 16 is released. At this time, the clamping block 15 can clamp the airbag cloth onto the test table 1 by the push spring. Then, another set of airbags is placed below the friction block 3, with the airbag cloth passing through the clamping plate 26 and the friction block 3 on both sides. Using the action of the tension spring 25, the clamping plate 26 is inserted into the slot 13 to stably clamp the airbag cloth. Then, the friction block 3 is connected to the connecting rod 10 by inserting the pin 19 into the insertion hole 17. Next, according to the test requirements, the stepper motor 21 drives the lead screw 22 to make the movable arm 2 move along the first slide groove 2. 0. Horizontal movement: At this time, the airbag cloth held at the bottom of the friction block 3 can move above the airbag cloth held by the clamping block 15 above the test platform 1. During movement, the force sensor can monitor the magnitude of the friction force in real time, thereby calculating the specific coefficient of friction. When moving from right to left to the very end, the electric push rod 7 drives the slider 5 to slide upward along the second slide groove 6. At this time, the friction block 3 can be raised. Then, the servo motor 12 drives the turntable 9 to rotate at a constant speed around its axis. The turntable 9 drives the friction block 3 to rotate through the connecting rod 10, adjusting the friction block 3 to the left side. Subsequently, the stepper motor 21 can drive the lead screw 22 in the opposite direction, thereby driving the friction block 3 to perform a second test from left to right.

[0047] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A device for testing the coefficient of friction of airbag fabric, characterized in that, It includes a test stand (1), a movable arm (2), a friction block (3), and a clamping block (15); The test platform (1) has support rods (14) vertically arranged at both ends on one side of the top. The support rods (14) pass through the guide holes on both sides of the clamping block (15). The clamping block (15) can be raised and lowered on one side of the top of the test platform (1) through the sliding cooperation between the guide holes and the support rods (14). The test platform (1) has a first slide groove (20) extending horizontally on the rear side. The bottom end of the movable arm (2) is movably installed in the first slide groove (20) through a sliding connection structure. The movable arm (2) has a second slide groove (6) extending vertically above the front wall of the movable arm (2). A slider (5) is slidably installed in the second slide groove (6). A lifting arm (4) is fixedly installed at the front end of the slider (5). A circular mounting base (8) is fixedly installed at the front end of the lifting arm (4). A turntable (9) is rotatably installed in the circular mounting base (8) through a bearing. A force sensor is embedded inside the turntable (9). A connecting rod (10) is fixedly connected to one side of the turntable (9) at an eccentric position. One end of the connecting rod (10) is fixedly connected to the sensing end of the force sensor. The other end of the connecting rod (10) is vertically penetrating and has an insertion hole (17). A bracket (18) is fixedly installed on one side of the top of the friction block (3). A pin (19) adapted to the insertion hole (17) is fixedly installed on the top of the bracket (18). The pin (19) can be inserted into the insertion hole (17) to realize the detachable connection between the friction block (3) and the connecting rod (10). Sleeves (23) are symmetrically fixedly installed on the outer walls of the front and rear sides of the friction block (3). Inner rods (24) are movably installed on both sides of the inner side of the sleeve (23) in the horizontal direction. Clamping plates (26) for holding the airbag cloth are fixedly installed on the outer end of the inner rod (24) and on both sides of the friction block (3).

2. The airbag fabric friction coefficient testing device according to claim 1, characterized in that, A support (11) is fixedly installed on the top of the lifting arm (4). A servo motor (12) is fixedly installed on the top of the support (11) and directly above the turntable (9). The transmission shaft at the bottom of the servo motor (12) is fixedly connected to the connecting hole at the center of the turntable (9) to drive the turntable (9) to rotate at a constant speed around its axis.

3. The airbag fabric friction coefficient testing device according to claim 1, characterized in that, An electric push rod (7) is fixedly installed on the top of the movable arm (2). The telescopic end of the electric push rod (7) is inserted through the second slide groove (6) and fixedly connected to the top of the slider (5) so that the slider (5) can be driven to slide up and down along the second slide groove (6) by the telescopic movement of the electric push rod (7).

4. The airbag fabric friction coefficient testing device according to claim 1, characterized in that, A stepper motor (21) is fixedly installed on one side of the inner wall of the first slide groove (20). The output shaft of the stepper motor (21) is connected to a lead screw (22) through a coupling. The lead screw (22) is rotatably installed in the first slide groove (20) and passes through the threaded hole at the bottom of the movable arm (2) and is threadedly engaged with the threaded hole.

5. The airbag fabric friction coefficient testing device according to claim 1, characterized in that, A tension spring (25) is fitted on the inner rod (24). The outer walls on both sides of the friction block (3) are provided with slots (13) that are compatible with the clamping plate (26). When the clamping plate (26) clamps the airbag cloth, it is inserted into the slot (13) to limit the movement trajectory of the clamping plate (26).

6. The airbag fabric friction coefficient testing device according to claim 1, characterized in that, A thrust spring is fitted on the top of the clamping block (15) and on the support rod (14), and the bottom end of the thrust spring is fixedly connected to the top of the clamping block (15), and the top end is fixedly connected to the support rod (14). A handle (16) is fixedly installed in the center of the top of the clamping block (15).

7. The airbag fabric friction coefficient testing device according to claim 1, characterized in that, The mating surfaces of the pin (19) and the socket (17) are provided with anti-slip texture to enhance the stability of the connection between the friction block (3) and the connecting rod (10).

8. The airbag fabric friction coefficient testing device according to claim 1, characterized in that, The movable arm (2), lifting arm (4) and connecting rod (10) are all made of aluminum alloy and have an anti-rust coating on the surface to improve the durability and corrosion resistance of the device.

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