| 摘要 |
PURPOSE:To make a steering mode continuously transferrable to both inphase and antiphase modes by linking a tip of a worm shaft with a reduction gear mechanism, while connecting this reduction gear mechanism to an inner rotor of a trochoidal gear mechanism via a transmission shaft installed in the reduction gear mechanism. CONSTITUTION:When an inner rotor 43 of a trochoidal gear mechanism (g) is rotated, a connecting portion of a connecting rod 43 connected to this rotor is moved forward. When a steering angle of a handwheel is small, a turning angle of the rotor also becomes smaller. When the turning angle of the rotor 43 is small like this, displacement of the connecting portion of the rod 51 is going to grow larger in a positive direction, by way of example. When the steering angle of the handwheel becomes larger, however, the turning angle of the rotor 43 also becomes larger, and at this time a displacing direction of the connecting portion of the rod 51 is reversed, so that the displacement increases in a negative direction on and after the specified time. Since a variation in the moving direction of this rod 51 is turned to a variation in the changeover direction of a spool 52 for a rear-wheel control valve VR, a steering mode is automatically transferred. |
