Design Analysis of Trunk Lid Hinge_Hinge Knowledge

A car trunk lid hinge is a crucial component that ensures smooth opening and closing of the trunk lid. The design and layout of this mechanism directly impact the safety and comfort of the car. Different combinations of hinges, gas springs, and extension springs are used to enhance stability and improve the opening effect of the trunk lid.

This article focuses on the combination of gooseneck hinges, extension springs, and gas springs, known as gooseneck air-supported trunk lid hinges. It discusses their related layout design on the car's trunk lid.

1. Working principle of gooseneck air-supported trunk lid hinge:

1.1 Gas springs are mechanisms consisting of a closed cylinder, piston assembly, and piston rod. They use gas pressure as an energy storage medium.

1.2 Gas springs are composed of joints, piston rods, guides, and cylinders. High-pressure gas inside the closed piston cylinder acts on the piston surface, generating an output thrust on the piston rod due to pressure difference and cross-sectional area difference.

1.3 When the trunk lid is closed, the tension spring is in maximum tension. Unlocking the trunk lid causes it to rotate counterclockwise around the hinge axis with the force of the tension spring and gas spring. The trunk lid needs the force of the gas spring to open smoothly. The opening process is stable and the gas spring ensures a smooth overall experience.

2. Arrangement of gooseneck air-supported trunk lid hinges:

2.1 The gooseneck air-supported trunk lid hinge is arranged on the body with the tension spring away from the driving side and the gas spring near the driving side.

2.2 The layout and installation design of the hinge system involve ensuring the coaxial alignment of the two trunk lid hinges in the Y direction and considering the space requirements of other parts. Adequate distances between the gas spring, extension spring, and other parts are crucial for proper functionality.

2.3 Design calculation involves balancing the moment generated by the tension spring, gravity, and gas spring. Adjusting the force values and elastic coefficients of the tension spring and gas spring ensures the desired opening force of the trunk lid.

3. Real vehicle status:

Through actual vehicle assembly, it has been observed that the trunk lid opens smoothly and provides a comfortable experience when closing.

In conclusion, this article provides a detailed analysis of gooseneck air-supported trunk lid hinges, discussing their layout, design calculation, and real vehicle status. This analysis serves as a reference for future designs and contributes to the improvement of hardware components in the automotive industry.