Collision avoidance principle:
When the car hits the lifting column, the column blocks the car from moving forward. The ground panel and the limiting flange are used as the fulcrum of the force. The fulcrum cannot be made of fragile materials such as cast aluminum and cast iron, and the fulcrum must directly contact the embedded foundation to transfer the force to the embedded foundation to form a strong supporting point.

The anti-collision flange must be in direct contact with the embedded parts to form piston movement, which will directly transfer the force to the embedded parts and the embedded foundation to release energy.