A seat belt buckle opening force testing device

Abstract

A seat belt buckle opening force testing device includes a rack and a buckle fixing unit, a buckle pressing unit, a seat belt reversing unit and a seat belt tensioning unit arranged on the rack. The buckle fixing unit fixes the buckle to be tested through a mounting seat. The buckle pressing unit uses a linear drive to drive a curved lever structure to press the buckle, and is equipped with a first tension sensor to accurately measure the opening force. The seat belt reversing unit realizes flexible adjustment of the seat belt angle through a slidable movable plate and a swingable swing arm structure, and cooperates with a roller. The design of the arc-shaped guide surface ensures the accuracy of the adjustment track. The seat belt tensioning unit uses an electric cylinder with a second tension sensor or a counterweight with a weight to provide stable tension, and realizes quick switching through a sliding pair. The device can accurately simulate the buckle opening working condition under different tensioning states of the seat belt, and has the advantages of high testing precision, flexible adjustment, simple operation and the like.

Description

Technical Field

[0001] This utility model relates to the field of automotive seat belt testing technology, and in particular to a seat belt buckle opening force testing device. Background Technology

[0002] The seatbelt buckle is a crucial component for ensuring occupant safety, and its opening force directly affects ease of use and safety. If the opening force is too great, occupants will find it difficult to quickly unbuckle the seatbelt in an emergency; if the opening force is too small, the buckle may accidentally open, posing a safety hazard. Therefore, accurate testing of the seatbelt buckle's opening force is essential.

[0003] Currently, existing testing devices struggle to precisely adjust the angle and position of seat belts during testing, resulting in poor repeatability of test results. Furthermore, the coordination between the buckle pressing mechanism and the seat belt tensioning mechanism is insufficient, making it impossible to simulate real-world usage scenarios. Additionally, the lack of multiple ways to adjust the seat belt tension makes it difficult to adapt to the testing requirements of different standards.

[0004] Therefore, in view of the shortcomings of the existing technology, it is necessary to design a seat belt buckle opening force testing device to solve the above problems.

[0005] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solution of this utility model and facilitating the understanding of those skilled in the art. It should not be assumed that the above content is known to those skilled in the art simply because it has been described in the background section of this utility model. Utility Model Content

[0006] To overcome the shortcomings of the prior art, the present invention aims to disclose a seat belt buckle opening force testing device to solve the problems of low testing accuracy, poor adaptability and repeatability in the prior art.

[0007] This utility model discloses a seat belt buckle opening force testing device, including a frame, and a buckle fixing unit, a buckle pressing unit, a seat belt reversing unit, and a seat belt tensioning unit disposed on the frame, wherein:

[0008] A worktable is installed on the frame;

[0009] The upper part of the locking unit is provided with a mounting base, which is configured to fix the locking unit to be tested.

[0010] The latch pressing unit includes a linear drive located on the rear side of the mounting base. The actuator of the linear drive is equipped with a first tension sensor. The actuator of the first tension sensor is connected to a crank rod. The front end of the crank rod extends to the front side of the mounting base and bends and extends towards the latch to be tested on the mounting base.

[0011] The safety belt reversing unit includes a guide plate and a movable plate. The guide plate is fixedly installed on the work platform, and an arc-shaped guide surface is provided at the end of the guide plate away from the mounting seat. The center of the arc of the guide surface is located on the central axis of the mounting seat. The movable plate is slidably connected to the guide plate along the arc-shaped guide surface. A swing arm that can swing toward the mounting seat is hinged on the movable plate, and a roller for supporting the safety belt is provided at the free end of the swing arm.

[0012] The seat belt tensioning unit is located below the movement path of the roller and is configured to apply tension to the seat belt.

[0013] Preferred technical solution: A guide plate is provided on one side of the swing arm, and a flip angle scale is installed on the guide plate. The center of the flip angle scale is located on the hinge axis of the swing arm.

[0014] Preferred technical solution: A limiting block is provided on the guide plate, which limits the swing end point of the swing arm to a position where the roller and the mounting seat are flush.

[0015] Preferred technical solution: The movable plate is fixedly connected to the workbench by bolts. The guide plate has an arc-shaped groove parallel to the arc-shaped guide surface. The workbench is provided with locking holes corresponding to the arc-shaped groove. The bolts pass through the arc-shaped groove and lock into the locking holes.

[0016] Preferred technical solution: There are two arc-shaped grooves, located at the end of the movable plate closer to the guide plate and the end farther away from the guide plate, respectively.

[0017] Preferred technical solution: A correction arc surface is provided at the end of the movable plate away from the guide plate, and an angle scale that matches the correction arc surface is provided on the worktable.

[0018] Preferred technical solution: The seat belt tensioning unit includes an electric cylinder connected to the frame via a sliding pair, and the actuator end of the electric cylinder is provided with a second tension sensor for connecting the seat belt.

[0019] Preferred technical solution: The seat belt tensioning unit includes a lifting platform connected to the frame via a sliding pair, and weights for suspending the seat belt are provided on the lifting platform.

[0020] Preferred technical solution: The upper end of the lifting platform is equipped with a tray for supporting weights.

[0021] Preferred technical solution: The sliding pair is configured to provide translational degrees of freedom along two orthogonal horizontal directions.

[0022] Due to the application of the above technical solution, the beneficial effects of this utility model compared with the prior art are as follows:

[0023] This invention, by incorporating a seatbelt reversing unit with an arc-shaped guide surface and an adjustable-angle swing arm, can precisely adjust the tension direction and angle of the seatbelt, simulating real-world usage scenarios and improving the accuracy and repeatability of test results. The buckle pressing unit employs a curved rod structure, combined with linear drive and a first tension sensor, to achieve smooth pressing of the buckle button and accurate force measurement. The seatbelt tensioning unit can apply tension using various methods such as an electric cylinder or weights, adapting to different testing standards and operating conditions, thus enhancing the device's applicability. An angle scale and a flip-up angle scale facilitate precise adjustment and recording of test parameters, further ensuring the standardization and consistency of the tests. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a seat belt buckle opening force testing device according to the present invention;

[0026] Figure 2 This is a schematic diagram of the seat belt reversing unit in this utility model.

[0027] In the above attached diagrams, 100 is the frame; 110 is the worktable; 120 is the locking hole; 130 is the angle scale; 200 is the locking unit; 210 is the mounting base; 300 is the locking pressing unit; 310 is the linear drive; 320 is the first tension sensor; 330 is the crank; 400 is the safety belt reversing unit; 410 is the guide plate; 420 is the movable plate; 421 is the straightening arc surface; and 430 is the arc-shaped guide. Surface; 440, swing arm; 450, roller; 460, guide plate; 470, flip angle scale; 480, limit block; 490, arc groove; 421, correction arc surface; 500, safety belt tensioning unit; 510, electric cylinder; 520, second tension sensor; 530, sliding pair; 540, lifting platform; 550, weight; 560, tray; 600, safety belt; 610, buckle to be tested. Detailed Implementation

[0028] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0029] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be used interchangeably where appropriate for the purposes of describing embodiments of this application herein. Furthermore, the terms "comprising" and "having," and their synonyms, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0030] In this application, the terms "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this utility model and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0031] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0032] Furthermore, the terms "installation," "setting," "equipped with," "connection," "linking," "fitting," and "fitting" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; 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 an internal connection between two devices, components, or parts. Similarly, "fitting" can mean completely or partially fitted. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] Example:

[0035] like Figure 1 and Figure 2As shown, this utility model discloses a seat belt buckle opening force testing device, including a frame 100, and a buckle fixing unit 200, a buckle pressing unit 300, a seat belt reversing unit 400, and a seat belt tensioning unit 500 disposed on the frame 100. The main components of the present utility model will be described in detail below:

[0036] A workbench 110 is provided on the frame 100.

[0037] The locking unit 200 is installed on the workbench 110, and a mounting base 210 is provided on its upper part for fixing the locking unit 610 to be tested.

[0038] The latch pressing unit 300 includes a linear drive 310, which in this embodiment is a linear motor. The linear drive 310 is located on the rear side of the mounting base 210, and its actuator is connected to a first tension sensor 320. The actuator of the first tension sensor 320 is connected to a crank 330. The front end of the crank 330 bends and extends to the front side of the mounting base 210 for pressing the button of the latch 610 to be tested. In this embodiment, a pressing head is also connected to the front end of the crank 330, which triggers the button of the latch 610 to be tested through a pressing head with a smaller diameter. It should be noted that the terms "front side" and "rear side" in the above description are only relative positional relationships between components and are used for easy correspondence with the accompanying drawings.

[0039] The safety belt reversing unit 400 includes a guide plate 410 and a movable plate 420. The guide plate 410 is fixed to the workbench 110, and one end is provided with an arc-shaped guide surface 430. The center of the arc surface of the arc-shaped guide surface 430 is located on the central axis of the mounting seat 210. The movable plate 420 is connected to the workbench 110 by bolts. When it is necessary to adjust the angle of the movable plate 420, the bolts fixing the movable plate 420 to the workbench 110 can be loosened, allowing the movable plate 420 to slide along the arc-shaped guide surface 430 at a specified angle, and then locked back to the workbench 110 by bolts. This drives the safety belt 600 to adjust its horizontal angle around the mounting seat 210, improving the accuracy of the test. A swing arm 440 is hinged to the movable plate 420. The swing arm 440 can swing toward the mounting seat 210, and a roller 450 is installed at its free end to support the safety belt 600. A guide plate 460 is provided on one side of the swing arm 440. A flip angle scale 470 is installed on the guide plate 460, with the center of the scale located on the hinge axis of the swing arm 440. A limit block 480 is also provided on the guide plate 460 to limit the swing endpoint of the swing arm 440, so that the roller 450 is flush with the mounting seat 210, that is, the safety belt 600 rotates 90° with the roller 450 as the fulcrum.

[0040] The movable plate 420 is fixed by bolts. The guide plate 410 has two arc-shaped grooves 490, which correspond to the locking holes 120 on the worktable 110. The bolts pass through the arc-shaped grooves 490 and lock into the locking holes 120, thereby realizing the position adjustment of the movable plate 420. The end of the movable plate 420 away from the guide plate 410 is provided with a correction arc surface 421. The worktable 110 is provided with an angle scale 130 for accurately reading the deflection angle.

[0041] The seatbelt tensioning unit 500 is located below the movement path of the roller 450 and includes an electric cylinder 510 and a second tension sensor 520. The electric cylinder 510 is connected to the frame 100 via a sliding pair 530, which provides two orthogonal horizontal translational degrees of freedom. The second tension sensor 520 is used to connect to the seatbelt 600 and measure the tension. Alternatively, the seatbelt tensioning unit 500 may include a lifting platform 540 and a weight 550. The lifting platform 540 is connected to the frame 100 via the sliding pair 530 and has a tray 560 on it to support the weight 550, applying tension to the seatbelt 600 through the gravity of the weight 550.

[0042] In a simulated emergency, the buckle 610 to be tested is fixed on the mounting base 210, and the seat belt 600 is routed around the roller 450 and connected to the electric cylinder 510. After adjusting the position of the movable plate 420 and the angle of the swing arm 440, the electric cylinder 510 is activated to simulate the required tension state based on feedback from the second tension sensor 520. That is, a large tension is first applied to the seat belt 600, typically 20KN, and then the tension is reduced to 300N. Finally, the buckle pressing unit 300 is activated, and the linear drive 310 drives the crank 330 to press the buckle 610 to be tested. The first tension sensor 320 records the opening force.

[0043] During static testing, the electric cylinder 510 is removed via the corresponding sliding pair 530, and the lifting platform 540 is moved below the roller 450 via the corresponding sliding pair 530. The lifting platform 540 is then raised, and the seat belt 600 is connected to the weight 550 on the lifting platform 540. The lifting platform 540 then lowers to release support for the weight 550, applying a constant tension to the seat belt 600 via the weight 550. Finally, the buckle pressing unit 300 is activated, and the linear drive 310 drives the crank 330 to press the buckle 610 under test. The first tension sensor 320 records the opening force, and the weight 550 falls onto the tray 560. It is important to note that after the lifting platform 540 lowers to release support for the weight 550, the distance between the lifting platform 540 and the weight 550 should not be too large to avoid excessively violent collisions.

[0044] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A seatbelt buckle opening force testing device, comprising a frame, and a buckle fixing unit, a buckle pressing unit, a seatbelt reversing unit, and a seatbelt tensioning unit disposed on the frame, characterized in that: A workbench is provided on the frame; The upper part of the locking unit is provided with a mounting base, which is configured to fix the locking unit to be tested. The latch pressing unit includes a linear drive located on the rear side of the mounting base. The actuator of the linear drive is equipped with a first tension sensor. The actuator of the first tension sensor is connected to a crank rod. The front end of the crank rod extends to the front side of the mounting base and bends and extends towards the latch to be tested on the mounting base. The safety belt reversing unit includes a guide plate and a movable plate. The guide plate is fixedly installed on the work platform, and an arc-shaped guide surface is provided at the end of the guide plate away from the mounting seat. The center of the arc of the guide surface is located on the central axis of the mounting seat. The movable plate is slidably connected to the guide plate along the arc-shaped guide surface. A swing arm that can swing toward the mounting seat is hinged to the movable plate, and a roller for supporting the safety belt is provided at the free end of the swing arm. The seat belt tensioning unit is located below the movement path of the roller, and the seat belt tensioning unit is configured to apply tension to the seat belt.

2. The seatbelt buckle opening force testing device according to claim 1, characterized in that: A guide plate is provided on one side of the swing arm, and a flip angle scale is installed on the guide plate. The center of the flip angle scale is located on the hinge axis of the swing arm.

3. The seatbelt buckle opening force testing device according to claim 2, characterized in that: The guide plate is provided with a limiting block, which limits the swing end point of the swing arm to a position where the roller is flush with the mounting seat.

4. The seatbelt buckle opening force testing device according to claim 1, characterized in that: The movable plate is fixedly connected to the workbench by bolts. The guide plate has an arc-shaped groove parallel to the arc-shaped guide surface. The workbench has a locking hole corresponding to the arc-shaped groove. The bolt passes through the arc-shaped groove and locks itself in the locking hole.

5. The seatbelt buckle opening force testing device according to claim 4, characterized in that: There are two arc-shaped grooves, located at the end of the movable plate closest to the guide plate and the end furthest from the guide plate, respectively.

6. The seatbelt buckle opening force testing device according to claim 1, characterized in that: The movable plate has a correction arc surface at the end away from the guide plate, and the workbench is equipped with an angle scale that matches the correction arc surface.

7. The seatbelt buckle opening force testing device according to claim 1, characterized in that: The seat belt tensioning unit includes an electric cylinder connected to the frame via a sliding pair, and the actuator end of the electric cylinder is provided with a second tension sensor for connecting the seat belt.

8. The seatbelt buckle opening force testing device according to claim 7, characterized in that: The seat belt tensioning unit includes a lifting platform connected to the frame via a sliding pair, and the lifting platform is provided with weights for suspending the seat belt.

9. A seatbelt buckle opening force testing device according to claim 8, characterized in that: The upper end of the lifting platform is provided with a tray for supporting the weights.

10. A seatbelt buckle opening force testing device according to claim 8, characterized in that: The sliding pair is configured to provide translational degrees of freedom along two orthogonal horizontal directions.

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