| 摘要 |
<p>The invention aims to provide a shock absorptive support structure in a coupler improved not only in economical efficiency but also in practical usefulness so that a shock due to relative displacement of a top plate and support brackets occurring in vertical direction as well as in back-and-forth direction can be effectively absorbed by the structure, a comfortableness to drive a tractor can be assured thereby, a wear of elastic members can be minimized and thereby a high safety of driving can be maintained for a long period with the structure of a simplified construction enabling the manufacturing cost to be reduced. To achieve this aim, shock absorbing members each comprising an inner cylinder (8), an outer cylinder (9) and an elastic member (10) disposed between these two cylinders, through which respective axle pins (5) rotatable extend, are tightly inserted into bearing holes (4) of respective support brackets (3) which are then inserted between respective pairs of projections extending downward from a bottom of a top plate (1) so as to leave a certain distance between tops of the respective support brackets (3) and the bottom of the top plate (1) and then the respective axle pins (5) are fixed at their longitudinally opposite ends to the projections extending downward from the bottom of the top plate (1). <IMAGE></p> |
