Small lumbar energy absorption device and safety belt buckle

Abstract

This invention has a compact structure, occupies little space, does not require modification of the existing vehicle body connection structure, and is highly reliable because the support plates are symmetrically arranged on both sides to balance the forces. [Solution] This invention discloses a micro-lumbar energy absorption device comprising a support plate and a wire rope, the support plate being provided with a positioning hole, a torque rod being provided in the positioning hole, rollers being connected to both ends of the torque rod, the upper end of the wire rope being fixed to a buckle head, the lower end of the wire rope being wound around and fixed to two rollers, and the winding direction of the wire rope on the two rollers being opposite to each other.

Description

Technical Field

[0001] The present invention belongs to the technical field of passive safety devices for automobiles, and more specifically relates to a small-sized lumbar energy absorption device and a safety belt buckle.

Background Art

[0002] The safety belt is a very important passive safety system in modern automobile safety systems, and the safety belt buckle is an important component of the safety belt system. When a collision occurs, the conventional safety belt buckle applies a large force to the occupant's waist. This force changes with the change in the rigidity of the vehicle body, and the change range is also large. The excessive lumbar load may cause great harm to the occupants in the vehicle.

[0003] The "Safety Belt Structure and Safety Belt Buckle with Buffer Lumbar Load Function" disclosed in Patent Document 1 is attached to the seat of a vehicle, connected to the safety belt buckle, and a safety belt is connected to the safety belt buckle. The safety belt buckle has an upper opening and a lower opening. The safety belt enters the interior of the safety belt buckle through the upper opening and is connected to the safety belt buckle. This technology includes a guide component, a buffer end part, a buffer component (located between the buffer end part and the guide component), and a connecting component (one end is connected to the buffer end part, and the other end passes through the guide component and is connected to the safety belt buckle). The connecting component enters the interior of the safety belt buckle through the lower opening. The buffer component is sleeved on the connecting component, and the load limit is output by the tension value generated by the stress of the wire rope on the inner wall of the slender tube.

[0004] Furthermore, the "buckle load limiting device" disclosed in Patent Document 2 specifically includes a wire cable and a fixing plate, wherein the wire cable is bent to form a bent end and two ends, the bent end is connected to the buckle, and the two ends are movably fixed to the vehicle body via the fixing plate, and when the force applied to the buckle reaches a certain threshold, the wire cable deforms and moves a certain distance relative to the fixing plate, the fixing plate is provided with a bending mechanism, the bending mechanism yields and bends the portion of the wire cable between the bent end and the two ends, forming a yield bend on the movement path of the wire cable, one yield bend generates a deformation force in the wire cable, which is converted into a load limit value for the buckle.

[0005] Furthermore, the "load-limiting buckle" disclosed in Patent Document 3 includes a buckle head, a connecting rope, and a load-limiting component, with one end of the connecting rope connected to the buckle head and the other end attached to the load-limiting component. The load-limiting component includes a U-shaped fixing plate (with through holes provided in each of the two side plates), a rotating cylinder (both ends attached to the two through holes, with a toothed structure provided on the inner wall of the end closest to the buckle head, the connecting rope wrapped around the outer wall of this end, and the free end of the connecting rope fixed to the cylinder wall), a load-limiting rod (mounted inside the rotating cylinder, having toothed structures at both ends, with one end engaging with the toothed structure inside the rotating cylinder), and a side cover (corresponding to the other end of the load-limiting rod, fixed to the outer wall of the fixing plate side plate, and having internal teeth inside that engage with the load-limiting rod).

[0006] Furthermore, the "load limiting energy absorption device for safety belts" disclosed in Patent Document 4 includes an energy absorption mechanism, the two connection ends of which are connected to the vehicle body and the buckle head or retractor, respectively. The structure of the energy absorption mechanism is such that a wire rope is housed in the lumen of a shell, the rear end of the shell forms one connection end of the energy absorption mechanism, the front end of the shell has an outlet for the wire rope, inside the outlet there is a load limiting core that is fixedly connected to the shell and deflects the wire rope, and the end of the wire rope extending from the shell constitutes the other connection end of the energy absorption mechanism. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Chinese Patent Application No. 202110997667.3 [Patent Document 2] Chinese Patent Application No. 202111566421.7 [Patent Document 3] Chinese Utility Model Registration Application No. 201821793790.3 [Patent Document 4] Chinese Patent Application No. 201410089494.1 [Overview of the project] [Problems that the invention aims to solve]

[0008] While the above-mentioned Patent Documents 1-4 all provide a cushioning effect when the safety belt is tightened, they require additional space to accommodate the cushioning components, which not only necessitates the allocation of additional space in the vehicle but also necessitates the design of a new connection structure to the vehicle body.

[0009] In view of the shortcomings of the prior art, this invention provides a highly reliable device that is compact in structure, occupies little space, does not require modification of the existing vehicle body connection structure, and is symmetrically arranged on both sides of the support plate to balance the forces. [Means for solving the problem]

[0010] To achieve the above objective, the present invention provides the following technical solution. The compact lumbar energy absorption device includes a support plate and a wire rope, the support plate is provided with a positioning hole, a torque rod is provided in the positioning hole, rollers are connected to both ends of the torque rod, the upper end of the wire rope is fixed to the buckle head, the lower end of the wire rope is wound around and fixed to two rollers, and the winding direction of the wire rope on the two rollers is opposite to that of the other.

[0011] Furthermore, the shaft sleeve is fixed within the positioning hole, and the torque rod passes through the shaft sleeve and is rotatably connected to it.

[0012] Furthermore, the roller is fitted onto the end of the shaft sleeve and rotatably connected to the shaft sleeve.

[0013] Furthermore, the end of the torque rod and the roller are fixed together by riveting.

[0014] Furthermore, the end of the torque rod and the roller are connected by a spline connection.

[0015] Furthermore, a guide groove is provided on the outer surface of the roller, the wire rope is positioned within the guide groove, and a stopper block is provided corresponding to the roller, with the end of the wire rope fixed to the stopper block.

[0016] Furthermore, two guide holes are provided at the upper end of the support plate, and both ends of the wire rope are passed through the two guide holes and connected to the roller.

[0017] Furthermore, the wire rope is made up of a single piece, and the wire rope is folded back from the middle and secured with a rivet.

[0018] Furthermore, a guide frame is provided above the support plate, a guide wheel is provided within the guide frame, the upper end of the wire rope is passed through the guide frame, and the guide frame is fixed to the support plate.

[0019] A safety belt buckle including a small-sized lumbar energy absorption device, further including a buckle head, a fixing pin is provided within the buckle head, and the fixing pin is connected to the upper part of the wire rope.

Effect of the Invention

[0020] The present invention installs rollers symmetrically on both sides of the support plate, enabling synchronous rotation during the contraction of the safety belt, achieving force balance, not requiring additional space inside the vehicle, having a small size, and being able to make the support plate the same as the existing one without the need to change the mounting structure with the vehicle body.

Brief Description of the Drawings

[0021] [Figure 1] A three-dimensional structure diagram of a safety belt buckle having a small-sized lumbar energy absorption device of the present invention. [Figure 2] A three-dimensional structure diagram example 1 (support plate is L-shaped) of a small-sized lumbar energy absorption device of the present invention. [Figure 3] A three-dimensional structure diagram example 2 (support plate is L-shaped) of a small-sized lumbar energy absorption device of the present invention. [Figure 4] A three-dimensional structure diagram of a combination of a support plate, a shaft sleeve, and a torque rod of the present invention. [[ID=3D]] [Figure 5] A three-dimensional structure diagram of the torque rod of the present invention, [Figure 6] A three-dimensional structure diagram of a combination of a roller, a shaft sleeve, and a torque rod of the present invention. [Figure 7] A three-dimensional structure diagram of a combination of a guide frame and a wire rope. [Figure 8] A three-dimensional structure diagram of the guide frame. [Figure 9]Figure 3 shows the three-dimensional structure of the small lumbar energy absorption device of the present invention (the support plate is in the shape of a straight line). [Figure 10] Figure 9 is a front view. [Figure 11] This is a cross-sectional view of section AA in Figure 10. [Figure 12] This is a cross-sectional view of the BB section in Figure 10. [Modes for carrying out the invention]

[0022] With reference to Figures 1 to 12, embodiments of the small lumbar energy absorption device and safety belt buckle of the present invention will be further described.

[0023] In describing this invention, it is necessary to explain terms that represent direction. Terms indicating direction and positional relationships, such as "center," "horizontal direction (X)," "vertical direction (Y)," "vertical direction (Z)," "length," "width," "thickness," "top," "bottom," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," "clockwise," and "counterclockwise," are based on the direction and positional relationships shown in the drawings and are intended to facilitate and simplify the explanation of this invention. They do not suggest that the device or elements need to have a specific direction, or that they need to be constructed and operated in a specific direction, and should not be understood as limiting the specific scope of protection of this invention.

[0024] Furthermore, terms such as "first," "second," etc., are used solely for descriptive purposes and do not indicate relative importance or imply the number of technical features. Therefore, anything possessing the "first" or "second" features may explicitly or implicitly include one or more such features. In this description of the invention, "multiple" and "several" mean two or more, unless otherwise clearly and specifically limited.

[0025] The compact lumbar energy absorption device includes a support plate 3 and a wire rope 2. The support plate 3 is provided with a positioning hole, a torque rod 7 is provided in the positioning hole, rollers 6 are connected to both ends of the torque rod 7, the wire rope 2 is folded back from its middle length, and both ends of the wire rope 2 (second end and lower end) are wound around and fixed to the two rollers 6, with the winding direction of the wire rope 2 on the two rollers 6 being opposite to each other.

[0026] In this embodiment, the support plate may also be provided with mounting holes 31, which are used for connection to the vehicle body. Of course, the support plate 3 can also be connected and fixed to the vehicle body by other methods (e.g., welding), and can be set as needed.

[0027] As shown in Figures 2 and 3, the wire rope 2 is folded back from its longitudinal middle section, and a fixing hole 21 is formed in the folded portion of the upper end (first end) of the wire rope 2. This fixing hole 21 is used to connect to the buckle head 1 of the safety belt. A fixing pin is provided on the buckle head 1, and the connection and fixing of the buckle head 1 and the wire rope 2 is completed when the fixing pin passes through the fixing hole 21, resulting in the final state shown in Figure 1.

[0028] In another embodiment, two wire ropes 2 can be provided, and the upper ends of the two wire ropes (one end, usually located at the upper end) can be connected to the buckle heads, or the upper ends of the two wire ropes can be connected first and then connected to the buckle heads.

[0029] In this embodiment, the number of times the wire rope 2 is wrapped around the roller 6 can be set as needed. The roller 6 is provided with a stopper block 62, and the end of the wire rope 2 is riveted to the stopper block 62. When the wire rope 2 (safety belt) is subjected to tensile force, the wire rope 2 is pulled upward, causing the wire rope 2 to rotate the roller 6, and the two rollers 6 rotate in opposite directions to each other, further twisting the torque rod 7, and the twisting of the torque rod 7 provides a certain amount of resistance.

[0030] As shown in Figure 4, in this embodiment, the shaft sleeve 5 is preferably fixed in the positioning hole, and the torque rod 7 passes through the shaft sleeve 5 and is rotatably connected to the shaft sleeve 5.

[0031] The shaft sleeve 5 is used to first enable the smooth rotation of the torque rod 7 and to prevent its displacement when subjected to torque. In other words, the shaft sleeve 5 increases the axial contact area of ​​the torque rod 7 and maintains the stability of the torque rod 7.

[0032] In this embodiment, the roller 6 is preferably fitted onto the end of the shaft sleeve 5 and rotatably connected to the shaft sleeve 5.

[0033] Specifically, the roller 6 is fitted into the shaft sleeve 5 in the axial direction, and the other part is fixed to the torque rod 7. This positions the roller 6 with the shaft sleeve 5, preventing it from falling off. Preferably, other structures such as bearings, annular positioning grooves, and positioning protrusions are provided between the shaft sleeve 5 and the roller 6 to connect them, so that the roller 6 and the shaft sleeve 5 rotate smoothly and are fixed relative to each other in the axial direction.

[0034] In one embodiment, the end of the torque rod 7 and the roller 6 are fixed together by rivet. In this method, the length of the wire rope 2 wrapped around the roller 6 is determined when the torque rod 7 and the roller 6 are fixed together, and no adjustment is possible afterward.

[0035] As shown in Figures 5 and 6, in another embodiment, the end of the torque rod 7 and the roller 6 are connected by a spline 71.

[0036] Specifically, splines 71 are provided on both the torque rod 7 and the roller 6, and they mesh with each other. This method allows for adjustment and control of the length of the wire rope 2 wrapped around the roller 6 by the relative angle between the torque rod 7 and the roller 6 when they are fixed, thus controlling the working distance of the wire rope 2. The more splines 71 there are, the higher the precision of the adjustment angle.

[0037] As shown in Figure 6, in this embodiment, a guide groove 61 is preferably provided on the outer circumferential surface of the roller 6, and the wire rope 2 is positioned within the guide groove 61. Typically, this guide groove 61 is an arc-shaped groove that positions the wire rope 2 and prevents it from coming off the roller 6.

[0038] As shown in Figures 2, 3, and 4, in this embodiment, two guide holes 32 are preferably provided at the upper end of the support plate 3, and both ends of the wire rope 2 are passed through the two guide holes 32 and connected to the roller 6.

[0039] The guide hole 32 can be formed by drilling a hole in the upper part of the support plate 3 and bending it, and is used to position the wire rope 2.

[0040] As shown in Figures 2 and 3, in one embodiment, the wire rope 2 is folded back from its middle section and then fixed with a rivet 4. The rivet 4 is provided at a certain distance from the upper end of the wire rope 2 so that the portion above the rivet 4 can form a fixing hole 21.

[0041] As shown in Figures 7 and 8, a guide frame 8 is provided above the support plate 3, and a guide wheel 81 is provided inside the guide frame 8. The upper end of the wire rope 2 is passed between the guide frame 8 and the guide wheel 81, and the guide frame 8 is fixed to the support plate 3.

[0042] In this case, the wire rope 2 is restricted by the guide frame 8 to prevent slackening, and the direction of the tensile force can be changed by installing the guide wheel 81. Preferably, a hook 82 is provided on the guide frame 8, and by fixing this hook 82 to the vehicle body, the rotation of the guide frame 8 is prevented, and furthermore, the lengths of the wire rope 2 wrapped around the two rollers 6 are kept appropriately matched.

[0043] In this embodiment, the torque rod 7 can be set according to the required torque, and typically, different output torque values ​​can be obtained by using torque rods 7 of different diameters. By combining this with the spline 71 connection to the roller 6, the output length of the wire rope 2 can be adjusted, and the torque value can also be adjusted.

[0044] The above are merely preferred embodiments of the present invention, and the scope of protection of the present invention is not limited to the above embodiments. All technical proposals based on the concept of the present invention fall within the scope of protection of the present invention. It should be noted to those skilled in the art that any minor improvements or modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention. [Explanation of symbols]

[0045] 1...Buckle head, 2...Wire rope, 21...Fixing hole, 3...Support plate, 31...Mounting hole, 32...Guide hole, 4...Rivet, 5...Axle sleeve, 6...Roller, 61...Guide groove, 62...Stopper block, 7...Torque rod, 71...Spline, 8...Guide frame, 81...Guide wheel, 82...Hook.

Claims

1. It has a support plate and a wire rope, Positioning holes are provided in the support plate. A torque rod is provided in the positioning hole. Rollers are connected to both ends of the torque rod, The first end of the wire rope is configured to be fixed to the buckle head, The second end of the wire rope is wrapped around and secured to each of the two rollers, A compact waist energy absorption device characterized in that the winding directions of the second ends of the wire rope around the two rollers are opposite to each other.

2. The shaft sleeve is fixed within the positioning hole, The compact lumbar energy absorption device according to claim 1, characterized in that the torque rod is passed through the shaft sleeve and the torque rod and the shaft sleeve are rotatably connected.

3. The compact lumbar energy absorbing device according to claim 2, characterized in that the two rollers are fitted to the ends of the shaft sleeve, and the two rollers and the shaft sleeve are rotatably connected.

4. The compact waist energy absorption device according to claim 3, characterized in that the end of the torque rod and the two rollers are fixed to each other by riveting.

5. The compact lumbar energy absorption device according to claim 3, characterized in that the end of the torque rod and the two rollers are connected by spline connections.

6. Guide grooves are provided on the outer circumferential surfaces of the two rollers. The wire rope is positioned within the guide grooves of the two rollers, and the second ends of the wire rope are wound around the two rollers, A stopper block is provided corresponding to each of the two rollers. The compact lumbar energy absorption device according to claim 4 or 5, characterized in that the second end of the wire rope is fixed to the stopper block.

7. Two guide holes are provided at the upper end of the support plate. The compact lumbar energy absorbing device according to claim 6, characterized in that the second ends of the wire rope are each passed through the two guide holes and each wound around the two rollers.

8. The aforementioned wire rope is composed of a single piece. The aforementioned wire rope is folded back in the middle of its longitudinal direction. The compact lumbar energy absorption device according to claim 7, characterized in that the second end of the wire rope is fixed to the stopper block by a rivet.

9. A guide frame is provided above the support plate. A guide wheel is provided within the guide frame. The first end of the wire rope is passed between the guide frame and the guide wheel. The compact lumbar energy absorption device according to claim 7, characterized in that the guide frame is fixed to the support plate.

10. A safety belt buckle equipped with a small lumbar energy absorption device as described in claim 1, A fixing pin is provided inside the buckle head. A safety belt buckle characterized in that the fixing pin is connected to the first end of the wire rope.

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