Safety belt pawl strength detection device

Abstract

A safety belt pawl strength detection device is characterized in that a detection assembly is movably connected in a support frame and can slide up and down along the support frame, and a reset mechanism is used for adjusting the detection assembly to an initial position; the first counterweight assembly is used for driving the detection assembly to stamp the first detection surface of the pawl; the second counterweight assembly is used for driving the detection assembly to punch a second detection surface opposite to the first detection surface. The detection assembly comprises a detection support, a stamping seat and a guide rod. The stamping seat is located in the detection support and is fixedly connected to the two guide rods; the two ends of the guide rod penetrate out of the detection support and then are installed on the detection support in a sliding fit mode. The guide rod between the stamping seat and the detection support is sleeved with a spring, and the stamping seat is used for stamping the pawl. The first balance weight assembly drives the detection assembly to move downwards, and the second balance weight assembly drives the detection assembly to move upwards, so that a bidirectional impact test of the stamping seat on the pawl in the vertical direction is realized, the strength of a pawl pin and a weak part can be evaluated more comprehensively, and the pawl can still keep enough strength and stability under the action of forces in different directions.

Description

Technical Field

[0001] This utility model relates to the field of pawl testing, specifically to a seat belt pawl strength testing device. Background Technology

[0002] Automotive seatbelt assemblies are used to protect passengers and provide safety. The pawl of the seatbelt assembly is a crucial locking mechanism, ensuring the seatbelt locks quickly in the event of an accident to protect passengers from injury. When a car decelerates sharply or a collision occurs, the seatbelt pawl locks immediately, restricting the passenger's forward movement. To ensure passenger safety, the strength of the pawl's weak points needs to be tested. This is especially true for the pins in the pawl and the surrounding weak areas, which are stress concentration zones and critical nodes in the connection structure. Since the pins and weak points on the pawl are critical to the connection, the tensile strength of the pawl pins and weak points needs to be tested to ensure passenger safety. Currently, there is a lack of equipment in production to test the tensile strength of the pawl pins, making it impossible to effectively assess the strength of stress concentration points during production. To improve the quality control of pawls, a seatbelt pawl pin strength testing device is needed. Utility Model Content

[0003] This utility model addresses the shortcomings of existing technologies by proposing a seatbelt pawl strength testing device, the specific technical solution of which is as follows:

[0004] A seatbelt pawl strength testing device, characterized in that:

[0005] Includes a support frame, a detection assembly, a reset assembly, a first counterweight assembly, and a second counterweight assembly;

[0006] The detection component is movably connected within the support frame, and the detection component can slide up and down along the support frame. The reset component is used to adjust the detection component to its initial position.

[0007] The first counterweight component is used to drive the detection component to press the first detection surface of the pawl;

[0008] The second counterweight component is used to drive the detection component to press against the second detection surface opposite to the first detection surface.

[0009] The detection assembly includes a detection bracket, a stamping base, and a guide rod;

[0010] The stamping seat is located inside the testing bracket, and the stamping seat is fixedly connected to the two guide rods;

[0011] The two ends of the guide rod pass through the detection bracket and are slidably mounted on the detection bracket;

[0012] A spring is fitted on the guide rod between the stamping seat and the detection bracket, and the stamping seat is used to stamp the ratchet.

[0013] To better realize this utility model, the reset assembly may further include a reset bracket, a reset lever, a reset connecting rod, a reset counterweight, and a reset cylinder.

[0014] The middle part of the reset lever is hinged to the top of the support frame. A first strip-shaped through groove is provided at the outer end of the reset lever, and a second strip-shaped through groove is provided at the inner end.

[0015] The upper end of the reset link is movably connected in the second strip-shaped through groove, and the upper end of the guide rod is movably connected in the first strip-shaped through groove. The reset link is used to convert the rotational motion into the linear motion of the guide rod.

[0016] A reset sliding hole is provided axially on the upper end face of the reset counterweight;

[0017] The lower end of the reset link extends into the reset sliding hole;

[0018] The reset limiting block is fixedly connected to the lower end of the reset connecting rod, and the reset limiting block is slidably installed in the reset sliding hole. The reset limiting block can only slide within the reset sliding hole.

[0019] The reset cylinder is fixedly connected to the reset bracket, and the reset cylinder is used to lift the reset weight.

[0020] Furthermore: the first counterweight assembly includes a first connecting rod, a first counterweight, and a first limiting block;

[0021] A first sliding hole is provided along the axial direction on the upper end face of the first hammer.

[0022] The upper end of the first connecting rod is fixedly connected to the detection bracket, and the lower end of the first connecting rod extends into the first sliding hole;

[0023] The first limiting block is fixedly connected to the lower end of the first connecting rod. The first limiting block is slidably installed in the first sliding hole, and the first limiting block can only slide within the first sliding hole.

[0024] Furthermore: the second counterweight assembly includes a second lever, a second connecting rod, a second counterweight, and a second limiting block;

[0025] The middle part of the second lever connects to the support frame;

[0026] The detection bracket is provided with a transverse sliding groove;

[0027] The stamping base is provided with a vertical groove that is perpendicular to the horizontal groove;

[0028] A second sliding pin is connected to one end of the second lever near the detection bracket;

[0029] The second sliding pin is movably connected within the transverse slide groove;

[0030] The second sliding pin extends from the transverse groove into the vertical groove;

[0031] A second sliding hole is provided along the axial direction on the upper end face of the second hammer;

[0032] The second link is used to drive the second lever to swing, and the lower end of the second link extends into the second sliding hole;

[0033] The second limiting block is fixedly connected to the lower end of the second connecting rod. The second limiting block is slidably installed in the second sliding hole, and the second limiting block can only slide within the second sliding hole.

[0034] Furthermore, a clamping mechanism is connected to the support frame for fixing the pawl.

[0035] Furthermore, a stamping groove is provided on one side of the stamping seat.

[0036] Furthermore, a conveying mechanism and a clamping member are provided. The clamping member is used to fix one end of the pawl, and the conveying mechanism is used to convey the pawl so that the measuring end of the pawl enters the stamping groove.

[0037] The beneficial effects of this utility model are as follows:

[0038] By replacing the counterweights with different specifications, the impact force applied to the ratchet can be precisely controlled, thereby achieving quantitative testing and ensuring that the expected impact force is applied in each test. The first counterweight component drives the detection component downwards, and the second counterweight component drives it upwards, enabling bidirectional impact testing of the ratchet in both vertical and horizontal directions. This allows for a more comprehensive evaluation of the strength of the ratchet pin and weak points, ensuring that the ratchet maintains sufficient strength and stability under forces applied in different directions. A reset component automatically returns the detection component to its initial position after testing, reducing the need for manual operation and improving the efficiency and accuracy of the testing process. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the first overall structure of the present invention;

[0040] Figure 2 This is a schematic diagram of the second overall structure of the present invention;

[0041] Figure 3 for Figure 2 AA three-dimensional sectional view;

[0042] The attached diagram shows the following components: 1. Workbench; 2. Conveying mechanism; 3. Clamping component; 4. Pawl; 5. Support frame; 6. Detection assembly; 7. Reset assembly; 8. First counterweight assembly; 9. Second counterweight assembly; 10. Pressing mechanism; 11. Detection bracket; 12. Horizontal slide groove; 13. Stamping seat; 14. Vertical slide groove; 15. Guide rod; 16. Spring; 17. Reset bracket; 18. Reset lever; 19. Reset connecting rod; 20. Reset hammer; 21. Reset cylinder; 22. First strip-shaped through groove; 23. Second strip-shaped through groove; 24. Reset sliding hole; 25. Reset limiting block; 26. First connecting rod; 27. First guide housing; 28. First hammer; 29. ​​First limiting block; 30. First sliding hole; 31. Second lever; 32. Second connecting rod; 33. Second guide housing; 34. Second hammer; 35. Second limiting block; 36. Second sliding pin; 37. Stamping groove. Detailed Implementation

[0043] 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.

[0044] In the description of this utility model, it should be noted that the terms "vertical," "upper," "lower," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] like Figures 1 to 3 As shown:

[0046] A seat belt pawl strength testing device includes a workbench 1, a support frame 5, a testing component 6, a reset component 7, a first counterweight component 8, and a second counterweight component 9.

[0047] Support frame 5, reset assembly 7, and conveying mechanism 2 are fixedly connected to workbench 1, with support frame 5 located between conveying mechanism 2 and reset assembly 7. Detection assembly 6 is movably connected within support frame 5, and can slide up and down along support frame 5. The reset assembly is used to adjust detection assembly 6 to its initial position. First counterweight assembly 8 is used to drive detection assembly 6 to press against the first detection surface of pawl 4. Second counterweight assembly 9 is used to drive detection assembly 6 to press against the second detection surface opposite to the first detection surface.

[0048] Specifically, the detection component 6 includes a detection bracket 11, a stamping seat 13, and guide rods 15. The stamping seat 13 is located inside the detection bracket 11 and is fixedly connected to the two guide rods 15. A stamping groove 37 is provided on one side of the stamping seat 13.

[0049] The two ends of the guide rod 15 pass through the detection bracket 11 and are slidably mounted on the detection bracket 11. A spring 16 is sleeved on the guide rod 15 between the stamping seat 13 and the detection bracket 11. The stamping seat 13 is used to stamp the pawl 4.

[0050] The clamping member 3 is installed on the conveying part of the conveying mechanism 2. The clamping member 3 is used to fix one end of the pawl 4. The conveying mechanism 2 is used to convey the pawl 4 so that the measuring end of the pawl 4 enters the stamping groove 37. A pressing mechanism 10 is connected on the support frame 5. The pressing mechanism 10 is used to fix the pawl 4.

[0051] The reset assembly includes a reset bracket 17, a reset lever 18, a reset connecting rod 19, a reset counterweight 20, and a reset cylinder 21. The middle part of the reset lever 18 is hinged to the top of the support frame 5. A first strip-shaped through groove 22 is provided at the outer end of the reset lever 18, and a second strip-shaped through groove 23 is provided at the inner end.

[0052] The upper end of the reset connecting rod 19 is movably connected to the second strip-shaped through groove 23, and the upper end of the guide rod 15 is movably connected to the first strip-shaped through groove 22. The reset connecting rod 19 is used to convert the rotational motion into the linear motion of the guide rod 15. A reset sliding hole 24 is provided axially on the upper end face of the reset counterweight 20. The lower end of the reset connecting rod 19 extends into the reset sliding hole 24. The reset limiting block 25 is fixedly connected to the lower end of the reset connecting rod 19. The reset limiting block 25 is slidably installed in the reset sliding hole 24. The reset limiting block 25 can only slide within the reset sliding hole 24. The reset cylinder 21 is fixedly connected to the reset bracket 17. The reset cylinder 21 is used to lift the reset counterweight 20.

[0053] The first counterweight assembly 8 includes a first lifting cylinder, a first guide housing 27, a first connecting rod 26, a first hammer 28, and a first limiting block 29. The first guide housing 27 is installed inside the workbench 1. The first hammer 28 is slidably installed inside the first guide housing 27. The first lifting cylinder is used to lift the first hammer 28, so that the first hammer 28 rises along the first guide housing 27. A first sliding hole 30 is axially formed on the upper end face of the first hammer 28. The upper end of the first connecting rod 26 is fixedly connected to the detection bracket 11. The lower end of the first connecting rod 26 extends into the first sliding hole 30. The first limiting block 29 is fixedly connected to the lower end of the first connecting rod 26. The first limiting block 29 is slidably installed inside the first sliding hole 30. The first limiting block 29 can only slide within the first sliding hole 30.

[0054] The second counterweight assembly 9 includes a second lifting cylinder, a second guide housing 33, a second lever 31, a second connecting rod 32, a second hammer 34, and a second limiting block 35.

[0055] The second guide housing 33 is installed inside the workbench 1. The second counterweight 34 is slidably installed inside the second guide housing 33. The second lifting cylinder is used to lift the second counterweight 34, causing the second counterweight 34 to rise along the second guide housing 33. The middle part of the second lever 31 is connected to the support frame 5. The detection bracket 11 is provided with a transverse sliding groove 12. The stamping seat 13 is provided with a vertical sliding groove 14 perpendicular to the transverse sliding groove 12. A second sliding pin 36 is connected to the end of the second lever 31 near the detection bracket 11. The second sliding pin 36 is movable. The second sliding pin 36 extends from the horizontal sliding groove 12 into the vertical sliding groove 14. A second sliding hole is provided axially on the upper end face of the second counterweight 34. The second connecting rod 32 is used to drive the second lever 31 to swing. The lower end of the second connecting rod 31 extends into the second sliding hole. The second limiting block 35 is fixedly connected to the lower end of the second connecting rod 32. The second limiting block 35 is slidably installed in the second sliding hole. The second limiting block 35 can only slide in the second sliding hole.

[0056] The principle of this utility model is as follows: First, when the initial state is set, the first cylinder, the second cylinder, and the reset cylinder 21 are all in the extended state. The first cylinder pulls the first weight 28 up to the upper part of the first guide housing 27, so that the first limiting block 29 is located at the lower part of the first sliding hole 30. The second cylinder pulls the second weight 34 up to the upper part of the second guide housing 33, so that the second limiting block 35 is located at the lower part of the second sliding hole. The reset cylinder 21 pulls the reset weight 20 up, so that the reset limiting block 25 is located at the upper part of the reset sliding hole 24.

[0057] Next, the reset assembly needs to adjust the detection assembly 6 to the initial position. Since the first hammer 28 does not apply tension to the first connecting rod 26 and the second hammer 34 does not apply tension to the second connecting rod 32, the detection assembly 6 can move up and down under the action of external force. When the reset cylinder 21 moves down, the hammer pulls the reset connecting rod 19 down to the reset bracket 17. The linear motion of the reset connecting rod 19 is converted into the rotation of the reset lever 18. The reset lever 18 drives the guide rod 15 to move up. The guide rod 15 drives the detection assembly 6 to move synchronously, so that the stamping seat 13 moves to the set position. Then the conveying mechanism 2 drives the clamping to move, and the measuring end of the pawl 4 enters the stamping groove 37.

[0058] When the stamping seat 13 needs to be pressed downwards, the reset cylinder 21 lifts the reset weight 20, so that the reset limit block 25 is located at the lower part of the reset sliding hole 24. The first lifting cylinder retracts, and the second lifting cylinder remains extended. The weight pulls the detection bracket 11 downwards through the first connecting rod 26. The detection bracket 11 acts on the stamping seat 13 through the upper spring 16. The stamping seat 13 moves downwards quickly and impacts the detection end of the pawl 4. At the same time, the stamping seat 13 pulls the guide rod 15 downwards. The guide rod 15 drives the reset lever 18 to rotate. The reset lever 18 pulls the reset connecting rod 19 upwards. Since the reset cylinder 21 lifts the reset weight 20 and the reset limit block 25 is located at the lower part of the reset sliding hole 24, the reset connecting rod 19 can move upwards accordingly under the action of the reset lever 18.

[0059] When the stamping seat 13 needs to be pressed upward, the reset hammer 20 remains placed on the reset bracket 17, so that the reset limit block 25 is located above the reset sliding hole 24. The first lifting cylinder remains extended, the second lifting cylinder retracts, and the hammer pulls the second lever 31 to rotate through the second connecting rod 32. The second lever 31 drives the detection bracket 11 to move upward. The detection bracket 11 acts on the stamping seat 13 through the spring 16 below, and the stamping seat 13 moves upward quickly to impact the detection end of the pawl 4. At the same time, the stamping seat 13 pulls the guide rod 15 to move upward, the guide rod 15 drives the reset lever 18 to rotate, and the reset lever 18 pushes the reset connecting rod 19 to move downward. Since the reset hammer 20 remains placed on the reset bracket 17 and the reset limit block 25 is located above the reset sliding hole 24, the reset connecting rod 19 can move downward accordingly under the action of the reset lever 18. It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0060] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A seatbelt pawl strength testing device, characterized in that: Includes a support frame, a detection assembly, a reset assembly, a first counterweight assembly, and a second counterweight assembly; The detection component is movably connected within the support frame, and the detection component can slide up and down along the support frame. The reset component is used to adjust the detection component to its initial position. The first counterweight component is used to drive the detection component to press the first detection surface of the pawl; The second counterweight component is used to drive the detection component to press against the second detection surface opposite to the first detection surface; The detection assembly includes a detection bracket, a stamping base, and a guide rod; The stamping seat is located inside the testing bracket, and the stamping seat is fixedly connected to the two guide rods; The two ends of the guide rod pass through the detection bracket and are slidably mounted on the detection bracket; A spring is fitted on the guide rod between the stamping seat and the detection bracket, and the stamping seat is used to stamp the ratchet.

2. The seat belt pawl strength testing device according to claim 1, characterized in that: The reset assembly includes a reset bracket, a reset lever, a reset connecting rod, a reset counterweight, and a reset cylinder; The middle part of the reset lever is hinged to the top of the support frame. A first strip-shaped through groove is provided at the outer end of the reset lever, and a second strip-shaped through groove is provided at the inner end. The upper end of the reset link is movably connected in the second strip-shaped through groove, and the upper end of the guide rod is movably connected in the first strip-shaped through groove. The reset link is used to convert the rotational motion into the linear motion of the guide rod. A reset sliding hole is provided axially on the upper end face of the reset counterweight; The lower end of the reset link extends into the reset sliding hole; The reset limiting block is fixedly connected to the lower end of the reset connecting rod. The reset limiting block is slidably installed in the reset sliding hole, and the reset limiting block can only slide within the reset sliding hole. The reset cylinder is fixedly connected to the reset bracket, and the reset cylinder is used to lift the reset weight.

3. The seatbelt pawl strength testing device according to claim 2, characterized in that: The first counterweight assembly includes a first connecting rod, a first counterweight, and a first limiting block; A first sliding hole is provided along the axial direction on the upper end face of the first hammer. The upper end of the first connecting rod is fixedly connected to the detection bracket, and the lower end of the first connecting rod extends into the first sliding hole; The first limiting block is fixedly connected to the lower end of the first connecting rod. The first limiting block is slidably installed in the first sliding hole, and the first limiting block can only slide within the first sliding hole.

4. The seat belt pawl strength testing device according to claim 3, characterized in that: The second counterweight assembly includes a second lever, a second connecting rod, a second counterweight, and a second limiting block; The middle part of the second lever connects to the support frame; The detection bracket is provided with a transverse sliding groove; The stamping base is provided with a vertical groove that is perpendicular to the horizontal groove; A second sliding pin is connected to one end of the second lever near the detection bracket; The second sliding pin is movably connected within the transverse slide groove; The second sliding pin extends from the transverse groove into the vertical groove; A second sliding hole is provided along the axial direction on the upper end face of the second hammer; The second link is used to drive the second lever to swing, and the lower end of the second link extends into the second sliding hole; The second limiting block is fixedly connected to the lower end of the second connecting rod. The second limiting block is slidably installed in the second sliding hole, and the second limiting block can only slide within the second sliding hole.

5. The seatbelt pawl strength testing device according to claim 4, characterized in that: A clamping mechanism is connected to the support frame, which is used to fix the pawl.

6. The seatbelt pawl strength testing device according to claim 5, characterized in that: A stamping groove is provided on one side of the stamping seat.

7. The seatbelt pawl strength testing device according to claim 6, characterized in that: The device is equipped with a conveying mechanism and a clamping component. The clamping component is used to fix one end of the pawl, and the conveying mechanism is used to convey the pawl so that the measuring end of the pawl enters the stamping groove.

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