Air bag seat of automobile shock absorber
By introducing a transition arc and an auxiliary pressure-bearing structure into the shock absorber airbag seat, the stress concentration problem is solved, the pressure-bearing capacity is improved, deformation or bursting is avoided, and a combination of safety and lightweight is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ADD IND ZHEJIANG CORP
- Filing Date
- 2025-06-05
- Publication Date
- 2026-04-21
AI Technical Summary
Traditional shock absorber airbag seats suffer from stress concentration under high-pressure conditions, which makes the connection between the reinforcing ribs and the inner wall prone to fatigue cracks, resulting in insufficient pressure bearing capacity and potential safety hazards.
A car shock absorber airbag seat is designed, which uses a transition arc to connect the reinforcing ribs to the inner wall of the main body, and sets an auxiliary pressure-bearing structure inside the main body, including a pressure-bearing ring and a buffer sleeve. By combining PA66 material and rubber material, sharp corners are eliminated and the pressure-bearing capacity is improved.
Effectively avoids stress concentration, enhances the pressure-bearing capacity of the airbag seat, prevents deformation or bursting, eliminates safety hazards, and improves fatigue life through material selection and structural design, achieving a balance between lightweight and high rigidity.
Smart Images
Figure CN224150085U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of automotive shock absorbers, and in particular to an airbag seat for an automotive shock absorber. Background Technology
[0002] Traditional shock absorber airbag seats typically have several circumferentially evenly distributed reinforcing ribs directly set on the inner wall of the ring. Although this structure can improve the strength of the foundation, it has obvious defects under high pressure conditions: there are sharp corners at the connection between the reinforcing ribs and the inner wall, which prevents the reinforcing ribs from fully supporting the inner wall of the airbag seat. At the same time, it leads to stress concentration, and fatigue cracks are easily generated in the stress concentration area, thus limiting the pressure bearing capacity. Once the pressure bearing capacity of the airbag seat is insufficient, it is very easy to deform or burst, which poses a serious safety hazard. Summary of the Invention
[0003] The present invention aims to solve the existing technical problem by providing an airbag seat for an automotive shock absorber that can avoid stress concentration, improve pressure resistance, effectively prevent deformation or bursting, and effectively eliminate safety hazards.
[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:
[0005] This utility model discloses an airbag seat for an automotive shock absorber, comprising a main body and several reinforcing ribs arranged circumferentially within the main body. A transition arc is provided at the connection between the reinforcing ribs and the inner wall of the main body. The radius of curvature R of the transition arc satisfies: 3mm ≤ R ≤ 15mm. The transition arc extends along the entire length of the reinforcing ribs. The cross-section of the reinforcing rib is trapezoidal, and its base width W and the radius R of the transition arc satisfy: W / R = 1.5-3.0. A matching auxiliary pressure-bearing structure is provided within the main body.
[0006] The radius of curvature R of the transition arc ranges from 5 mm to 8 mm.
[0007] The main body and the reinforcing ribs are integrally formed and both are made of PA66 material.
[0008] The crystallinity of the PA66 material is ≥40%, and the crystallinity of the transition arc is 5%-10% higher than that of other parts of the main body.
[0009] The auxiliary pressure-bearing structure includes a pressure-bearing ring and a buffer sleeve; the pressure-bearing ring is located inside the main body, and the buffer sleeve is located between the outer wall of the pressure-bearing ring and the inner wall of the main body; the outer circumferential surface of the pressure-bearing ring is provided with several grooves corresponding to the positions of the reinforcing ribs; the buffer sleeve is made of rubber; the outer circumferential surface of the buffer sleeve is recessed inward to form several recesses that match the grooves; the recesses are fitted over the reinforcing ribs.
[0010] There are grooves between adjacent reinforcing ribs; the main body has several inner cavities corresponding to the center of the grooves; and the inner cavities are provided with matching strip-shaped support members.
[0011] The beneficial effects of this utility model are:
[0012] Compared with the prior art, the transition arc of the airbag seat of the automobile shock absorber with the structure of this utility model can effectively eliminate sharp corners, avoid stress concentration, and make full use of the supporting effect of the reinforcing ribs on the inner wall of the airbag seat. This effectively improves the pressure bearing capacity of the airbag seat and avoids deformation or bursting of the airbag seat due to insufficient pressure bearing capacity, thus effectively eliminating safety hazards. Attached Figure Description
[0013] Figure 1 This is a cross-sectional view of the airbag seat of the automotive shock absorber of this utility model from one angle;
[0014] Figure 2 This is a cross-sectional view of the airbag seat of the automotive shock absorber of this utility model from another angle;
[0015] Figure 3 This is a schematic diagram of the auxiliary pressure-bearing structure. Detailed Implementation
[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:
[0017] Please see Figures 1 to 3 This utility model provides an airbag seat for an automotive shock absorber, comprising a main body 1 and several reinforcing ribs 2 arranged circumferentially within the main body. A transition arc 3 is provided at the connection between the reinforcing ribs 2 and the inner wall of the main body 1. The radius of curvature R of the transition arc 3 satisfies: 3mm ≤ R ≤ 15mm. The transition arc 3 extends along the entire length of the reinforcing ribs 2. The cross-section of the reinforcing rib 2 is trapezoidal, and its base width W and the radius R of the transition arc 3 satisfy: W / R = 1.5-3.0. An auxiliary pressure-bearing structure matching the reinforcing rib is provided within the main body 1.
[0018] The radius of curvature R of the transition arc 3 ranges from 5 mm to 8 mm.
[0019] The main body 1 and the reinforcing rib 2 are integrally formed and both are made of PA66 material.
[0020] The crystallinity of the PA66 material is ≥40%, and the crystallinity of the transition arc 3 is 5%-10% higher than that of other parts of the main body 1.
[0021] The auxiliary pressure-bearing structure includes a pressure-bearing ring 4 and a buffer sleeve 5; the pressure-bearing ring 4 is located inside the main body 1, and the buffer sleeve 5 is located between the outer wall of the pressure-bearing ring 4 and the inner wall of the main body 1; the outer circumferential surface of the pressure-bearing ring 4 is provided with a plurality of grooves 6 corresponding to the positions of the reinforcing ribs 2; the buffer sleeve 5 is made of rubber; the outer circumferential surface of the buffer sleeve 5 is recessed inward to form a plurality of recesses 7 that match the grooves 6; the recesses 7 are fitted over the reinforcing ribs 2.
[0022] There is a groove 8 between adjacent reinforcing ribs 2; the main body 1 is provided with a plurality of inner cavities 9 corresponding to the middle position of the groove 8; the inner cavity 9 is provided with a matching strip-shaped support 10.
[0023] The method of using this utility model is as follows:
[0024] The presence of the transition arc 3 can effectively eliminate sharp corners and reduce the stress concentration factor by ≥40%, allowing the supporting effect of the reinforcing rib 2 on the inner wall of the airbag seat body 1 to be fully utilized, thereby effectively improving the pressure bearing capacity of the airbag seat and avoiding deformation or bursting of the airbag seat due to insufficient pressure bearing capacity, effectively eliminating safety hazards.
[0025] The transition arc 3 extends along the entire length of the stiffener 2, which can effectively solve the problem of discontinuous axial stress and make fatigue life increase by leaps. The cross section of the stiffener 2 is trapezoidal, and its base width W and the radius R of the transition arc 3 satisfy: W / R=1.5-3.0, which can effectively overcome the contradiction between lightweight and high stiffness, achieve maximum load-bearing efficiency, and thus form a dual-path load transfer, generating nonlinear gain through parameter correlation.
[0026] The radius of curvature R of the transition arc 3 ranges from 5 mm to 8 mm, which can further avoid stress concentration leading to fatigue cracks.
[0027] The main body 1 and the reinforcing rib 2 are integrally formed and both are made of PA66 material. The tensile strength of PA66 material is 33% higher than that of PA6 material in traditional airbag seats. At the same time, the transition arc 3 can eliminate the risk of stress cracking caused by the brittleness of PA66 material, while the increased material rigidity maximizes the support efficiency of the reinforcing rib.
[0028] The crystallinity of PA66 material is ≥40%, and the crystallinity of the transition arc 3 is 5%-10% higher than that of other parts of the main body 1. The high crystallinity position can effectively increase the strength, while the low crystallinity position can effectively ensure the toughness. The combination of strength and toughness allows the wall thickness of the airbag seat to be reduced by 20% under the same pressure bearing capacity, thus achieving the lightweighting of the airbag seat.
[0029] The pressure-bearing ring 4 can be made of high-strength metal, which can not only support and bear pressure when the main body 1 deforms, but also indirectly increase the actual thickness of the main body 1 and improve its strength. The buffer sleeve 5 is made of rubber. When the main body 1 deforms, the buffer sleeve 5 can absorb the impact with its own elasticity, further preventing the main body 1 from deforming or bursting. The presence of the recess 7 and the groove 6 can realize the mechanical fitting between the pressure-bearing ring 4, the buffer sleeve 5 and the main body 1, connecting the three to the greatest extent, thereby maximizing the actual pressure-bearing capacity of the main body.
[0030] There are grooves 8 between adjacent reinforcing ribs 2. The main body 1 has several inner cavities 9 corresponding to the middle position of the grooves 8. The inner cavity 9 is provided with matching strip-shaped support members 10. The strip-shaped support members 10 are distributed adjacent to the reinforcing ribs 2, so that a uniform support force can be formed in various parts of the main body 1, further improving the pressure bearing capacity of the main body 1.
Claims
1. An airbag seat for an automotive shock absorber, comprising a main body and a plurality of reinforcing ribs arranged circumferentially within the main body, characterized in that: The connection between the reinforcing rib and the inner wall of the main body is provided with a transition arc; the radius of curvature R of the transition arc satisfies: 3mm ≤ R ≤ 15mm; the transition arc extends along the entire length of the reinforcing rib; the cross section of the reinforcing rib is trapezoidal, and its base width W and the radius of the transition arc R satisfy: W / R=1.5-3.0; the main body is provided with a matching auxiliary pressure-bearing structure.
2. The gas cell of a shock absorber for an automobile according to claim 1, wherein: The radius of curvature R of the transition arc ranges from 5 mm to 8 mm.
3. The gas cell of claim 1 wherein: The main body and the reinforcing ribs are integrally formed and both are made of PA66 material.
4. The gas cell of claim 3 wherein: The crystallinity of the PA66 material is ≥40%, and the crystallinity of the transition arc is 5%-10% higher than that of other parts of the main body.
5. The gas cell of claim 1 wherein: The auxiliary pressure-bearing structure includes a pressure-bearing ring and a buffer sleeve; the pressure-bearing ring is located inside the main body, and the buffer sleeve is located between the outer wall of the pressure-bearing ring and the inner wall of the main body; the outer circumferential surface of the pressure-bearing ring is provided with several grooves corresponding to the positions of the reinforcing ribs; the buffer sleeve is made of rubber; the outer circumferential surface of the buffer sleeve is recessed inward to form several recesses that match the grooves; the recesses are fitted over the reinforcing ribs.
6. The gas cell of claim 1 wherein: There are grooves between adjacent reinforcing ribs; the main body has several inner cavities corresponding to the center of the grooves; and the inner cavities are provided with matching strip-shaped support members.