| 摘要 |
A shock absorbing device of a crash box for a vehicle is provided to achieve improved safety by preventing the crash box from being easily broken down during an initial stage of a vehicle crash so as to absorb a large amount of shock energy during the initial stage of the vehicle crash. A shock absorbing device of a crash box(13) for a vehicle includes a shock absorbing beam(21), a sliding block(23), a fixed wall(25), an elastic member(27), an operating pin actuator(29), a vehicle speed sensor(43), and a crash sensor(45). The shock absorbing beam is arranged in the length direction in hollow portions formed in the crash box and a side member(11), and has a front end supporting a bumper beam(5). The sliding block is formed integrally with a rear end of the shock absorbing beam such that the sliding block contacts the hollow portion of the side member and is slidable. The sliding block has an upper surface and a lower surface with respective pin holes. The fixed wall is fixed in a rear portion of the side member. The elastic member is interposed between the fixed wall and the sliding block in the side member. The operating pin actuator is mounted on an outer upper surface and an outer lower surface of the side member in correspondence to each pin hole of the sliding block such that the operating pin actuator inserts operating pins(28) into the pin holes in accordance with the control signal output from a controller(41). The vehicle speed sensor senses the vehicle speed and outputs a signal to the controller. The crash sensor senses a vehicle crash and outputs a signal to the controller.
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