Steel wire support applied to a seat belt latch
Patent Information
- Application Number
- CN202522202912.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-17
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-10-17
AI Technical Summary
[0007]为此，本申请提供一种应用于安全带插锁的钢丝支架，以解决现有钢丝支架由于应力集中导致整体结构可靠性降低的问题
[0022]1、本申请基于对现有技术问题的进一步分析和研究，提供了一种应用于安全带插锁的钢丝支架，通过对钣金件与钢丝绳铆接位置进行优化设计，在钣金件的折弯处设置两个圆角结构，其中，内侧圆角首先降低折弯应力峰值，外侧圆角再次分流剩余应力，并形成连续过渡曲面，从而最大化分散钣金件折弯处的应力，提升钣金件的整体结构强度，使得钢丝支架的可靠性和耐久性显著增强，使用寿命延长。
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Figure CN224898784U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of automotive parts technology, specifically to a wire bracket for use in seat belt locks. Background Technology
[0002] A steel wire bracket is a key component used for installing seatbelt latches in automobiles. Its main function is to ensure that the seatbelt latches are reliably secured to the vehicle body structure while the vehicle is in motion. Figures 1-3 As shown, a traditional wire rope bracket typically consists of a sheet metal part 1 and a wire rope 2. The sheet metal part is bent to form two bends 13 on both sides to fix the two ends of the wire rope. The wire rope provides the necessary tension to ensure the stability of the seat belt lock. The two ends of the wire rope pass through the interior of the two bends and are firmly connected to the surface of the sheet metal part by riveting.
[0003] However, the above design has some drawbacks:
[0004] 1. When the bent section is laid flat, its bending area is usually at a right angle (1 / 4 inch) or a sharp angle. See [reference needed]. Figure 3 This design can lead to stress concentration during bending. Specifically, the force transmission path changes abruptly at the corner, similar to a "sharp turn," causing the stress in a localized area to be much higher than the overall average stress. During sheet metal bending, even if the overall stress does not exceed the material's strength limit, the stress concentration point may be the first to develop cracks, plastic deformation, or even fracture due to excessive local stress.
[0005] 2. Due to stress concentration, the strength of the wire rope and sheet metal after riveting will decrease. During long-term use, especially under dynamic loads (such as vehicle bumps), fatigue cracks may appear at the riveting points, eventually leading to connection failure and affecting the reliability of the entire bracket.
[0006] Stress concentration and weakened riveting strength severely compromise the reliability of the entire support structure. During vehicle operation, the securing strength of the seatbelt latch directly impacts passenger safety. If the support structure cracks or the connections loosen, the seatbelt latch may malfunction in an emergency, endangering passenger lives. Utility Model Content
[0007] Therefore, this application provides a wire bracket for use in seat belt locks to solve the problem of reduced overall structural reliability caused by stress concentration in existing wire brackets.
[0008] To achieve the above objectives, this application provides the following technical solution:
[0009] A steel wire bracket for use in seat belt locks includes: a sheet metal part and a steel wire rope. The sheet metal part is a flat structure and includes a fixing part and an mounting part. The fixing part is used to fix the sheet metal part to the vehicle body, and the mounting part is used to fix the steel wire rope and connect it to the seat belt lock through the steel wire rope.
[0010] The mounting part has two bending parts on both sides along the width direction. When the bending part is in a flat state, two rounded corners with opposite directions are arranged at the end near the fixing part along the width direction. The two rounded corners make the end face of the bending part form an "S" shape. After bending, the bending part forms an inner cavity. The end of the steel wire rope passes through the inner cavity and is riveted to the surface of the sheet metal part.
[0011] Optionally, the rounded corner is a semicircle.
[0012] Optionally, the rounded corner near the mounting portion is referred to as the inner rounded corner, and the inner rounded corner is recessed inward to form a recessed portion;
[0013] The rounded corner on the side away from the mounting part is called the outer rounded corner, which protrudes outward to form a protrusion.
[0014] Optionally, heat shrink tubing is provided on the exterior of the mounting part and the wire rope.
[0015] Optionally, the bending portion has a gradually transitioning arc structure in the bending area, the arc structure being smoothly and tangentially connected to the inner rounded corner to form a continuous curved surface.
[0016] Optionally, the sheet metal part is made of a rigid material;
[0017] The relationship between the radius R of the semicircle and the thickness H of the sheet metal part is: R = 0.5 × H ~ H, and the minimum radius R of the semicircle is ≥ 0.5 mm.
[0018] Optionally, the sheet metal part is made of aluminum or copper;
[0019] The relationship between the radius R of the semicircle and the thickness H of the sheet metal part is: R = 0.3 × H ~ H, and the minimum radius R of the semicircle is ≥ 0.3 mm.
[0020] Optionally, the central area of the fixing part is provided with a mounting hole for fixing the sheet metal part to the vehicle body with screws, and the outer side of the fixing part is also provided with a limiting hole for limiting cooperation with other parts of the vehicle body.
[0021] Compared with the prior art, this application has at least the following beneficial effects:
[0022] 1. Based on further analysis and research of the existing technical problems, this application provides a wire rope bracket for seat belt locks. By optimizing the design of the riveting position between the sheet metal part and the wire rope, two rounded corner structures are set at the bending point of the sheet metal part. The inner rounded corner first reduces the peak bending stress, and the outer rounded corner further diverts the remaining stress and forms a continuous transition surface, thereby maximizing the dispersion of stress at the bending point of the sheet metal part, improving the overall structural strength of the sheet metal part, and significantly enhancing the reliability and durability of the wire rope bracket, thus extending its service life.
[0023] 2. The bending section of this application has a gradually transitioning arc structure in the bending area. This arc structure is smoothly and tangentially connected to the inner rounded corner to form a continuous curved surface, which further reduces stress concentration and prevents cracks from forming. Attached Figure Description
[0024] To more intuitively illustrate the prior art and this application, exemplary drawings are provided below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing this application; for example, based on the technical concept disclosed in this application and the exemplary drawings, those skilled in the art are able to easily make conventional adjustments or further optimizations to the addition / reduction / classification, specific shapes, positional relationships, connection methods, size ratios, etc. of certain units (components).
[0025] Figure 1 This is a schematic diagram of the structure of a conventional steel wire support in this application;
[0026] Figure 2 for Figure 1 The side view shown;
[0027] Figure 3 for Figure 1 A schematic diagram of the flat state of the sheet metal parts;
[0028] Figure 4 A schematic diagram of the structure of a wire bracket for a seatbelt locking device provided in one embodiment of this application. Figure 1 ;
[0029] Figure 5 A schematic diagram of the structure of a wire bracket for a seatbelt locking device provided in one embodiment of this application. Figure 2 ;
[0030] Figure 6 for Figure 4 A partial schematic diagram of a sheet metal part in the bending area;
[0031] Figure 7 for Figure 4 A schematic diagram of the flat state of the sheet metal parts;
[0032] Figure 8A schematic diagram of a steel wire support structure provided in one embodiment of this application, wherein a heat shrink tubing is wrapped around the outside. Figure 1 ;
[0033] Figure 9 A schematic diagram of a steel wire support structure provided in one embodiment of this application, wherein a heat shrink tubing is wrapped around the outside. Figure 2 .
[0034] Explanation of reference numerals in the attached figures:
[0035] 1. Sheet metal parts; 11. Fixing part; 111. Mounting hole; 112. Limiting hole; 12. Mounting part; 13. Bending part; 131. Inner rounded corner; 132. Outer rounded corner; 133. Arc structure; 14. Right angle; 2. Steel wire rope; 3. Heat shrink tubing; A. Riveting position. Detailed Implementation
[0036] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0037] In the description of this application: unless otherwise stated, "a plurality of" means two or more. The terms "first," "second," "third," etc., in this application are intended to distinguish the objects referred to and do not have any special meaning in terms of technical connotation (e.g., they should not be construed as an emphasis on importance or order). Expressions such as "including," "comprising," and "having" also mean "not limited to" (certain units, components, materials, steps, etc.).
[0038] The terms used in this application, such as "upper," "lower," "left," "right," and "middle," are generally used to indicate the general relative positional relationship for the purpose of intuitive understanding by referring to the accompanying drawings, and are not absolute limitations on the positional relationship in the actual product.
[0039] Currently, during the bending process of traditional steel wire rope supports, stress concentration in the sheet metal parts can easily lead to a weakening of the strength between the sheet metal and the steel wire rope at the riveting position, thus affecting the overall structural reliability of the steel wire rope support. To address this issue, this application provides a steel wire rope support for a seat belt lock, which optimizes the riveting position A between the sheet metal parts and the steel wire rope (see...). Figure 4 The design incorporates two relatively large rounded corner structures at the bends of the sheet metal parts to disperse the stress at the bends, increase the overall structural strength of the sheet metal parts, and further improve the reliability and durability of the wire bracket.
[0040] The following is a detailed description of the wire bracket for use with seat belt locks provided in this application:
[0041] like Figures 4-9As shown, the steel wire bracket includes: sheet metal part 1 and steel wire rope 2. Sheet metal part 1 is a flat structure and includes a fixing part 11 and an mounting part 12. The fixing part 11 is used to fix the sheet metal part 1 to the vehicle body, and the mounting part 12 is used to fix the steel wire rope 2 and connect it to the seat belt lock through the steel wire rope 2.
[0042] The mounting part 12 has two bent parts 13 on both sides along the width direction. The two ends of the steel wire rope 2 pass through the interior of the two bent parts 13 respectively and are riveted to the surface of the mounting part 12 of the sheet metal part 1.
[0043] When the bent portion 13 is in a flat state (i.e. before bending), two rounded corners with opposite directions are sequentially provided at the end near the fixed portion 11 along the width direction. The two rounded corners make the end face of the bent portion near the fixed portion form an "S" shape structure. This design helps to reduce stress concentration during bending and improve the strength and reliability of the structure. After bending, the bent portion 13 forms an inner cavity. The end of the wire rope 2 passes through the inner cavity and is riveted to the surface of the sheet metal part 1. This design can fix the wire rope 2 and helps to reduce stress concentration during bending and improve the strength and reliability of the structure.
[0044] The central area of the fixing part 11 is provided with a mounting hole 111 for fixing the sheet metal part 1 to the vehicle body with screws, and the outer side of the fixing part 11 is also provided with a limiting hole 112 for limiting cooperation with other parts of the vehicle body.
[0045] Preferably, the rounded corners are semi-circular.
[0046] Preferably, see Figure 6 and Figure 7 The rounded corner on the side near the mounting part 12 is called the inner rounded corner 131. The inner rounded corner 131 is recessed inward (i.e., recessed inward in the direction away from the fixing part 11) to form a recessed part.
[0047] The rounded corner on the side away from the mounting part 12 is designated as the outer rounded corner 132. The outer rounded corner 132 protrudes outward (i.e. protrudes towards the fixing part 11) to form a protruding part.
[0048] More preferably, see Figure 8 and Figure 9 Heat shrink tubing 3 is installed on the outside of the mounting part 12 and the wire rope 2, which serves to provide mechanical protection and prevent scratches on the sheet metal surface. It also provides waterproofing, corrosion protection, and aesthetic appeal.
[0049] More preferably, such as Figure 5 As shown, the bending portion 13 has a gradually transitioning arc structure 133 in the bending area. The arc structure 133 is smoothly and tangentially connected to the inner rounded corner 131 to form a continuous curved surface.
[0050] The radius of the aforementioned fillet (semicircle) is determined based on the thickness of the sheet metal part.
[0051] When the sheet metal part is made of a rigid material with poor plasticity, the relationship between the radius R of the semicircle and the thickness H of the sheet metal part 1 is: R = 0.5 × H ~ H; at the same time, the minimum radius R of the semicircle is 0.5 mm, otherwise the tensile stress of the outer layer is likely to exceed the yield limit of the material, leading to cracking.
[0052] For example, when the thickness H of sheet metal part 1 is 1mm, the minimum radius R of the semicircle is 0.5mm, and the design size range of the radius R of the semicircle is 0.5~1mm; when the thickness H of sheet metal part 1 is 3mm, the minimum radius R of the semicircle is 1.5mm, and the design size range of the radius R of the semicircle is 1.5-3mm, specifically R=1.5mm and R=2mm can be selected.
[0053] When the sheet metal part is made of a material with good plasticity (such as aluminum, copper, mild steel), the relationship between the radius R of the semicircle and the thickness H of the sheet metal part 1 is: R = 0.3 × H ~ H; at the same time, the minimum radius R of the semicircle is 0.3 mm, at which point bending is less likely to cause cracking and stress concentration is controllable.
[0054] In summary, this application provides a sheet metal design that can alleviate stress concentration and optimize stress distribution at sheet metal bends, ensure that the bends will not tear, and provide high strength after riveting with steel wire ropes, and has at least the following advantages:
[0055] (1) Reduce stress at sheet metal bends and lower the risk of tearing;
[0056] (2) Increase the strength of sheet metal, thereby enhancing the overall structural strength and durability of the steel wire bracket and improving its reliability.
[0057] The technical features of the above embodiments can be combined in any way (as long as there is no contradiction in the combination of these technical features). For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described; these embodiments not explicitly written should also be considered to be within the scope of this specification.
Claims
1. A wire bracket for use in seat belt locks, characterized in that, include: Sheet metal parts and steel wire ropes, wherein the sheet metal parts are generally flat structures, including a fixing part and an mounting part, the fixing part is used to fix the sheet metal parts to the vehicle body, and the mounting part is used to fix the steel wire ropes and connect them to the seat belt locks through the steel wire ropes; The mounting part has two bending parts on both sides along the width direction. When the bending part is in a flat state, two rounded corners with opposite directions are arranged at the end near the fixing part along the width direction. The two rounded corners make the end face of the bending part form an "S" shape. After bending, the bending part forms an inner cavity. The end of the steel wire rope passes through the inner cavity and is riveted to the surface of the sheet metal part.
2. The wire bracket for use in seatbelt locking as described in claim 1, characterized in that, The rounded corner is a semicircle.
3. The wire bracket for use in seatbelt locking as described in claim 1 or 2, characterized in that, The rounded corner near the mounting portion is called the inner rounded corner, and the inner rounded corner is recessed inward to form a recessed portion; The rounded corner on the side away from the mounting part is called the outer rounded corner. The outer rounded corner protrudes outward to form a protrusion.
4. The wire bracket for use in seatbelt locking as described in claim 3, characterized in that, Heat shrink tubing is provided on the outside of the mounting section and the wire rope.
5. The wire bracket for use in seatbelt locking as described in claim 3, characterized in that, The bending section has a gradually transitioning arc structure in the bending area. The arc structure is smoothly and tangentially connected to the inner rounded corner, forming a continuous curved surface.
6. The wire bracket for use in seatbelt locking as described in claim 2, characterized in that, The sheet metal part is made of rigid material; The relationship between the radius R of the semicircle and the thickness H of the sheet metal part is: R = 0.5 × H ~ H, and the minimum radius R of the semicircle is ≥ 0.5 mm.
7. The wire bracket for use in seatbelt locking as described in claim 2, characterized in that, The sheet metal parts are made of aluminum or copper; The relationship between the radius R of the semicircle and the thickness H of the sheet metal part is: R = 0.3 × H ~ H, and the minimum radius R of the semicircle is ≥ 0.3 mm.
8. The wire bracket for use in seatbelt locking as described in claim 1, characterized in that, The central area of the fixing part is provided with a mounting hole for fixing the sheet metal part to the vehicle body with screws, and the outer side of the fixing part is also provided with a limit hole for limiting and cooperating with other parts of the vehicle body.