| 摘要 |
<P>PROBLEM TO BE SOLVED: To achieve more simplification in a structure and reduction in weight by providing a vibration-absorption mechanism for reducing longitudinal vibration and vertical vibration with a simple structure while contriving a linkage mechanism. <P>SOLUTION: At the bottom dead point, an upper frame 20 is set slanted with the front side higher than the rear side, and at the top dead point, the upper frame slanted at the bottom dead point becomes stable while being swingable along the motion trajectory of a four-node-rotation chain mechanism, thereby becoming horizontal in position. This allows the longitudinal or the vertical vibration given while travelling to be converted into a half-pendulum motion along the motion trajectory of the four-node-rotation chain mechanism, so as to be absorbed by the vibration-absorption mechanism. That is, by using the longitudinal vibration given by acceleration and deceleration during travelling and also a rigid-body property, the upper frame moving along the motion trajectory like this can effectively reduce the vertical vibration which has a significant impact on people to feel uncomfortable. <P>COPYRIGHT: (C)2013,JPO&INPIT |
