Core Design Principle for New Gas Spring Applications

When a customer has no existing gas spring and is not looking for a replacement, the project must begin with the required function—not with a catalogue part number.

Application Working Requirements and Product Parameters

In this application, the lid weighs approximately 10 kg and measures 818 W × 550 L × 140 H mm. It must open to about 90 degrees. The operator should manually lift the lid at first. After the lid passes a defined angle threshold, the gas spring should provide enough assistance to continue opening it. Below this threshold, the lid should close slowly and in a controlled manner.

Key Factors Affecting Gas Spring Selection

This operating behavior depends on the complete mechanism. Lid weight alone is not enough to select a gas spring. Engineers must also consider the hinge position, center of gravity, mounting coordinates, required stroke, gas spring force and the changing torque throughout the movement.

Hidden Risks and Optimization Requirements of Mounting Structure

A key issue identified during the supplier evaluation was the proposed installation position. With the original mounting arrangement, the required gas spring overall length and stroke could not be achieved. The lid might therefore fail to open fully to 90 degrees or fail to close completely. The mounting points needed to be adjusted before finalizing the gas spring specification.

Reliable Design Verification and Prototype Testing Standards

For a reliable design, the closed, threshold and fully open positions should be checked in a side-view layout or CAD model. The design must confirm retracted length, extended length, stroke, clearance and force direction at every stage. Prototype testing should then verify manual opening force, the assistance threshold, opening stability, closing speed and final closing impact.

Optimal Development Mode for New Custom Solutions

For new applications, the most effective approach is collaborative design between the customer and supplier. By starting with the lid geometry and required movement, JPGASSpring can develop a gas spring solution that fits the mechanism and delivers predictable performance in production