| 摘要 |
PROBLEM TO BE SOLVED: To provide a rack pinion mechanism in which a pressing force for pressing a rack shaft to a pinion shaft becomes large only when a large separation force acts thereon without deteriorating a steering feeling at a normal time.SOLUTION: A rack pinion mechanism comprises: a pinion shaft 10 in which pinion teeth 11 are formed; a rack shaft 20 in which rack teeth 21 engaged with the pinion teeth 11 are formed; a rack guide main body 31 which presses the rack guide 20 arranged at a side opposite to the rack teeth 21 toward the pinion shaft 10; a first compression coil spring 51 which energizes the rack guide main body 31 toward a side approximating the pinion shaft 10 by an elastic restoration force; and a second compression coil spring 52 which energizes the rack guide main body 31 toward a side separating from the pinion shaft 10 by an elastic restoration force. In an initial state, a first energization force by which the first compression coil spring 51 energizes the rack guide main body 31 is larger than a second energization force by which the second compression coil spring 52 energizes the rack main body 31.SELECTED DRAWING: Figure 3 |
