一种汽车门铰链

The integrated design and chamfered treatment of the car door hinges solve the problem of easy cracking in welded connections, achieving more uniform force transmission and higher safety and durability.

CN224514974UActive Publication Date: 2026-07-17SHANGHAI XINLIAN METAL NEW MATERIAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHANGHAI XINLIAN METAL NEW MATERIAL CO LTD
Filing Date
2025-07-24
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing automotive door hinges, which are connected by welding, are prone to stress concentration, which can lead to cracking after long-term use, affecting their service life and safety.

Method used

The body hinges and door hinges are machined as a single unit, with chamfering at the connection point. The design incorporates different chamfer radii at different edges and a misaligned centerline to form an integral structure that evenly distributes the load and avoids stress concentration.

Benefits of technology

It reduces the risk of loose connections and breakage, extends service life, improves safety and durability under extreme conditions, and reduces wear and fatigue cracks caused by sharp edges.

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Abstract

本申请涉及一种汽车门铰链，其包括用于与车身连接有车身铰链和用于与车门连接有车门铰链，所述车身铰链与车门铰链之间一体加工成形，所述车身铰链和车门铰链的连接处进行倒角处理。本申请通过车身铰链与车门铰链采用一体加工，避免了传统分体式结构通过焊接、螺栓连接等方式组装时可能出现的连接薄弱点，这种整体性结构能更均匀地承受车门开关过程中的作用力，大幅降低连接处松动、断裂的风险，延长铰链的使用寿命；同时连接处的倒角处理不仅能避免加工过程中产生的锐边对操作人员造成划伤，更重要的是，在汽车行驶或车门开关时，可减少因锐边导致的应力集中现象，倒角能使力的传递更平缓，提升铰链在极端工况下的安全性。
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Claims

1. An automotive door hinge, characterized by, The car door hinge includes a body hinge (1) for connecting to the car body and a door hinge (2) for connecting to the car door. The body hinge (1) and the door hinge (2) are integrally formed, and the connection between the body hinge (1) and the door hinge (2) is chamfered.

2. The automotive door hinge of claim 1, wherein The edges of the vehicle body hinge (1) are all chamfered, and the radii of the chamfers on opposite edges of the vehicle body hinge (1) are different.

3. The automotive door hinge of claim 1, wherein The edge of the door hinge (2) away from the body hinge (1) is chamfered, and the chamfer radius of the edge of the door hinge (2) away from the body hinge (1) is the same.

4. The automotive door hinge according to claim 1, characterized in that, The centerline of the vehicle body hinge (1) and the centerline of the door hinge (2) are not on the same straight line.

5. The automotive door hinge of claim 1, wherein The chamfer radii of the two edges of the body hinge (1) away from the door hinge (2) are equal, the chamfer radii of the two edges of the body hinge (1) close to the door hinge (2) are equal, and the chamfer radius of the body hinge (1) away from the door hinge (2) is greater than the chamfer radius of the door hinge (2) close to the door hinge (2).

6. The automotive door hinge of claim 1, wherein The center lines of the two chamfers at the connection between the vehicle body hinge (1) and the door hinge (2) are not on the same straight line.

7. The automotive door hinge of claim 1, wherein The width of the body hinge (1) is greater than the width of the door hinge (2), and the length of the body hinge (1) is less than the length of the door hinge (2).

8. The automotive door hinge of claim 1, wherein, The vehicle body hinge (1) and door hinge (2) are made of alloy structural steel.