| 摘要 |
A retractable step for use with a vehicle comprises a stepping member(122) having a stepping deck(124),a first arm(130a), a second arm(130b), a motor(146) and a stop(152). The first arm(130a) has a first end pivotally attached to the vehicle, and a second end pivotally attached to the stepping member(122). The second arm(130b also has a first end pivotally attached to the vehicle, and a second end pivotally attached to the stepping member(122) . The motor(146) is drivingly connected to the first arm(130a) such that a rotation of the motor(146) causes rotation of the first arm(130a) about its first end and moves the stepping member(122) from a retracted position to an extended position, or vice versa. The stop(152) is located within the range of motion of the second arm such that the second arm bears against the stop whe n the stepping member(122) is in the extended position. The first(130a) and second arms(130b) are situated such that the first arm(130a) is loaded in compression and the second arm(130b) is loaded in tension when the stepping member is in the extended position and a load is placed upon it. |
