Improved type front shock absorption device of tricycle

Abstract

The invention relates to an improved type front shock absorption device of a tricycle. The improved type front shock absorption device of the tricycle comprises a front fork component and two front shock absorbers, wherein the front fork component comprises two front fork pipes, an upper yoke plate, a lower yoke plate and lower hinge plates; the upper yoke plate and the lower yoke plate are connected onto the two front fork pipes correspondingly; the bottom parts of the two front fork pipes are connected onto supporting seats of the lower hinge plates correspondingly in a hinging way; the middle part of each front fork pipe is in transition to the inward-inclining lower part through a circular arc section; upper brackets are fixedly arranged on the circular arc sections of the front fork pipes correspondingly; upper connecting rings of front shock absorbers are connected onto the upper brackets correspondingly in the hinging way; the front shock absorbers are connected onto shock absorption seats on the lower hinge plates correspondingly in the hinging way; the hinge center of the shock absorption seat of each lower hinge plate is located on the lower part of a connection line from the hinge center of the supporting seat and the hinge center of a front shaft installation seat; and the distance h2 from the hinge center of one supporting seat to the hinge center of one shock absorption seat is 0.5 to 0.7 times of the distance h1 from the hinge center of the other supporting seat to the other front shaft installation seat. The improved type front shock absorption device of the tricycle has the characteristics of rational structure and good shock absorption effect; and in addition, the service life can be improved.

Description

technical field [0001] The invention relates to an improved tricycle front shock absorber, which belongs to the technical field of tricycle front shock absorbers. Background technique [0002] The shock absorber is mainly used to buffer the impact vibration on the driver and passengers caused by the impact of the ground on the vehicle, so as to improve the comfort of the drivers and passengers. Most of the front shock absorbers of tricycles use straight-tube shock absorbers and rocker-arm front shock absorbers. Straight-tube shock absorbers are mainly composed of shock absorbers, shock absorbing springs, dampers, and shock absorbing columns. After the impact, the shock-absorbing column moves downward, and the shock-absorbing spring bears the pressure. At the same time, part of the oil in the lower oil chamber of the shock-absorbing cylinder breaks through the gear ring valve plate and flows into the transition oil chamber, while the other part of the oil passes through the l...

AI Technical Summary

Problems solved by technology

However, for the tricycle front shock absorber of the straight shock absorber, the shock absorber column of the front shock absorber is directly inserted into the shock absorber tube. Since the up and down movement of the shock absorber column is sliding friction, and the vehicle is subjected to longitudinal and lateral shocks during driving, Thrust, it is easy to cause oil seal leakage, jamming and other phenomena, which will affect the shock absorption effect and reduce the service life of the shock absorber

[0003] Although the rocker arm type front shock absorber overcomes the oil seal leakage and jamming caused by the straight shock absorber, the distance between the hinge center of the front fork tube and the lower hinge plate and the hinge center of the front shock absorber is the same as that of the lower hinge. The ratio of the distance between the hinge center of the hinge plate and the hinge center of the wheel is less than 0.4, so the shock absorption stroke of the front shock absorber is small, and the impact force suffered by the buffer vehicle is small during driving, and the shock absorption effect is not good

Furthermore, the shock absorber is composed of an inner damping cylinder, an outer damping cylinder, a piston rod assembly, a damping spring, and a shock absorbing spring. The inner slides downwards, the damping spring rebounds, and the piston rod assembly slides upwards in the inner damping tube to play a role of shock absorption. The longitudinal force and lateral force of the whole vehicle act on the piston rod, but the diameter of the piston rod is usually small , its diameter generally does not exceed Φ12.5mm, and the inner damping cylinder is generally made of steel pipes with a wall thickness of 1 to 2mm. Damage to the front shock absorber

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