一种具有减震功能的法兰螺栓
By using high-quality carbon alloy steel and a flexible damping unit designed with double-layer composite materials in the flange bolts, the problems of noise transmission and metal fatigue of flange bolts in high vibration environments are solved, achieving efficient vibration reduction and noise reduction, and improving the NVH performance and service life of the whole vehicle.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI CHANGTE FORGING CO LTD
- Filing Date
- 2025-04-14
- Publication Date
- 2026-07-17
AI Technical Summary
Existing automotive exhaust system flange bolts cannot effectively absorb vibration energy, causing noise to be transmitted into the vehicle body. Furthermore, in high-vibration environments, they are prone to accelerating metal fatigue, affecting the overall vehicle's NVH performance and service life.
The main body is made of high-quality carbon alloy steel and has a double-layer composite material with an inner ring-shaped nested layer. The inner layer is made of polyurethane foam and the outer layer is made of vulcanized natural nitrile rubber. Stainless steel spring clips are set in the middle to form a flexible damping unit to absorb and disperse vibration energy.
While ensuring clamping force, it significantly improves energy absorption and shock resistance, reduces damage caused by vibration, reduces noise interference, and enhances ride comfort and device lifespan.
Smart Images
Figure CN224515633U_ABST
Abstract
Claims
1. A flange bolt with shock-absorbing function, comprising a main rod body (11), a head (12) and an intermediate annular nesting layer (13), characterized in that, The flange bolt (1) consists of a main body (11), a head (12) and an intermediate annular nested layer (13). The main body (11) is made of high-quality carbon alloy steel, and the head (12) is hexagonal. The most special feature is the addition of an intermediate annular nested layer (13) made of double-layer composite material. The intermediate annular nested layer (13) includes an inner layer (131) and an outer layer (132), the inner layer (131) being located on the side closer to the head (12), and the outer layer (132) being located on the side of the inner layer (131) away from the head (12); The intermediate annular nested layer (13) is provided with multiple stainless steel spring plate positioning buckle assemblies (14) around the transition area between the inner and outer rings.
2. The flange bolt with a shock-absorbing function according to claim 1, characterized in that, The outer layer (132) is wrapped with a natural nitrile rubber tape (1321) with a thickness of about 0.5 mm after vulcanization.
3. The flange bolt with shock-absorbing function according to claim 1, characterized in that, The main rod (11) is made of 45# carbon tempered alloy steel pipe, and the head (12) is a hot-dip galvanized hexagonal head finished part conforming to GB / T standard.