| 摘要 |
A door operating assembly for opening and closing vehicle doors at a constant door edge force includes a frame (12). A teeter lever assembly (24) is pivotally mounted on the frame and is connected to a connecting rod assembly (30), (32) connecting the teeter lever assembly and the vehicle doors. An air piston assembly (16) drives a rod (22) connected to the teeter lever assembly to rotate the teeter lever assembly. A spring (62) for closing the doors is secured at a first end to the frame and at a second end to a flexible connection member (66) which wraps around the outer periphery of a teeter lever assembly cam (70) upon door opening. The energy stored in the spring at full extension is used to close the doors. To maintain the force on the doors constant during opening and closing, the cam provides a larger moment arm in the door closed position than the door open position. |
