Patent ID: 7699330

Claim:
A shock-absorbing suspension device adapted to couple a frame of a wheeled vehicle with a wheel axle, comprising: a mounting rod which is adapted to be mounted on the frame, and which has upper and lower ends opposite to each other in an upright direction; a wheel rod having a lower segment which is adapted to be mounted on the wheel axle to transmit upwards from the wheel axle a shock force generated as a result of passing of the wheeled vehicle over an uneven road surface, and an upper segment which extends from said lower segment in the upright direction to terminate at a top end that is jerked upwards and downwards when the shock force is transmitted upwards, and which has proximate and distal regions relative to said top end, said upper segment being disposed forward of said mounting rod in a longitudinal direction transverse to the upright direction; a counteracting member including a pivoted region which is pivotally mounted on said lower end of said mounting rod about a pivoting axis in a transverse direction transverse to both the upright and longitudinal directions, and a counteracting body configured to extend from said pivoted region forward to terminate at a coupler area which extends in the upright direction to terminate at upper and lower linked ends; upper and lower linking bars, said upper linking bar being disposed to couple said upper linked end to said proximate region, said lower linking bar being disposed to couple said lower linked end to said distal region to thereby form a four-bar linkage mechanism such that, as a result of upward or downward jerking movement of said top end, said coupler area of said counteracting body is moved downwards or upwards about the pivoting axis, thereby dampening the shock force transmitted to said counteracting body; a cantilever arm disposed to extend from said upper end in the longitudinal direction to terminate at a bearing end; and a force transmitting member disposed to couple with said four-bar linkage mechanism so as to transmit the dampened shock force to said bearing end to thereby minimize impact of the shock force on said mounting rod; said upper and lower linking bars respectively defining upper and lower lengthwise lines which extend forward and which intersect at a vertex, said force transmitting member being coupled to said counteracting body at a pivotal point such that a pivotal axis passing through the pivotal point is oriented in a direction parallel to the pivoting axis, and such that the pivotal axis intersects a straight line drawn between the vertex and the pivoting axis substantially at a right angle.