Patent ID: 8739914

Claim:
A vehicle comprising: a body frame having a rear wheel rotatably mounted thereon, the body frame comprising a head pipe; in which a steering handlebar is mounted to an upper end of a steering shaft, and a front frame portion extending forward from the head pipe, a bushing operatively attached to the head pipe and comprising: an inner cylinder supported at a vehicle-widthwise central portion of the body frame and having a vertically extending central axis, an outer cylinder, the outer cylinder surrounding the inner cylinder, and an elastic member interposed between the inner cylinder and the outer cylinder, a pair of left and right steering arms extending in opposed vehicle-widthwise directions and having inner end portions secured to the outer cylinder, and knuckle-supporting portions defined at outer end portions thereof, a sub-steering shaft pivotally passing through the inner cylinder; a pair of left and right knuckles individually and pivotally supporting the corresponding respective left and right front wheels, the knuckles being steerably supported by the corresponding knuckle-supporting portions of the left and right steering arms, a first lever mounted to a lower end portion of the steering shaft so as to be turned together with the steering shaft, and a second lever mounted to an upper end portion of the sub-steering shaft, the first and second levers connected via a connecting rod, a third lever installed at a lower end portion of the sub-steering shaft, the third lever connected to the left and right knuckles via corresponding individual tie rods, a fourth lever secured to a rear portion of the outer cylinder, and a rigid movement-transmitting rod having a first end connected to the fourth lever via a first universal joint, and a second end connected to the body frame via a second universal joint.