CN2068926U

CN2068926U - Oil-air (spring) shock absorber for motor cycles

Info

Publication number: CN2068926U
Application number: CN 90205434
Authority: CN
Inventors: 陈忠纯
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-04-24
Filing date: 1990-04-24
Publication date: 1991-01-09

Abstract

The utility model relates to a three-wheel load-carrying motorcycle bumper with pre inflation pressure, which comprises a tubular shock strut and a tubular damper cylinder. The upper end of the shock strut is provided with a pre charging connector, the lower end is provided with a damper seat, and a complete damper is composed of the damper seat and an ejector rod which is arranged on the center of the bottom of the damper cylinder. When oil in the damper cylinder passes though the damper in operation, the positive resistance force and the negative resistance force are different, and a safety shut-off value which is composed of a semi-floating shut-off plug and the damper seat can prevent the damper cylinder meeting paroxysmal insulation sectional shock during the return stroke. Thus the natural frequency is lower, smooth running performance is better, and the contacted stability between wheels and roads is raised.

Description

Oil-air (spring) shock absorber for motor cycles

The utility model belongs to the hydro-pneumatic spring field, can be used for the motor bike suspension, does the usefulness of supporting and damping.

Application number 90201149.9 it " a kind of three-wheel load-carrying motorcycle vibration absorber " has still kept metal coil spring in the utility model, the deficiency that does not have the higher and forward and reverse elasticity unanimity of natural frequency of radical change metal coil spring, so for three-wheel load-carrying motor, when travelling on bad road surface, its travelling comfort and wheel are to the road stability in contact--and the road-holding property of direction still fails to improve better.

The utility model is that existing three-wheel load-carrying motorcycle vibration absorber is improved, a kind of oleo-pneumatic shock absorber with preliminary filling air pressure is proposed, it is made up of tubulose shock strut and damping cylinder, in the upper end of pillar pre-charging connector is housed, there is the damper seat lower end, form complete damper with the push rod that is installed in damping cylinder bottom centre, when the fluid in the damping cylinder is flowed through this damper at work, forward and reverse resistance difference, and form safety shut-off valve because of the plug that dams by semi-floating with the damper seat, can prevent that damping cylinder from meeting the unloading impact of burst in return of stroke.

The utility model has following accompanying drawing:

Fig. 1 is the utility model structural representation

Fig. 2 is the utility model structure partial scheme drawing

In conjunction with the accompanying drawings 1, Fig. 2 a.b. describes in detail the utility model.

Dividing plate (3) and pre-charging connector (1) are equipped with in the upper end of shock strut (2), damper seat (5) is equipped with in its lower end, the ratio of the fluid volume of being adorned in effective volume between dividing plate and damper seat and the damping cylinder (8) is 1:1～0.8, at the cavity V of shock strut ₂In adorn the semi-floating plug (4) that dams with liquid surface lifting, outside the two faying face of the relation of it and damper seat such as Fig. 2 a. is respectively, internal conical surface, coning angle is all 60 °～120 °, head at the damper seat has an annular groove, O V-shaped ring (6) is housed in the groove, damping hole f is arranged at the bottom of damper seat is a taper hole, it forms its forward and reverse damping ratio of damper (Fig. 2 b.) with the push rod (7) that is installed in damping cylinder bottom centre is 1:2.5～4.5, cover (10) and shock strut are housed in the upper end of damping cylinder trap and leave safety distance 1 between (9), this distance is filled in for preventing V for semi-floating dams ₂The pressurized air that is subjected to squeeze accumulation of energy in the chamber causes the impact of upper and lower cover when sudden unloading.During use, the preliminary filling air enters V through pre-charging connector (1) ₂Reach 1.5～4.0 kilograms per centimeter ²Make shock strut and damping cylinder do elongation to greatest extent, because of being subjected to load by compression, this moment and be subjected to maximumly to carry as impact etc. outward, it is 0.85～1.5 kilogram/millimeter that its compression degree is summed up as spring stiffness after the entrucking, when the upwards rise of damping sleeve, be squeezed in V in travelling ₁Fluid in the chamber enters pillar cavity V through the damping hole f of damper seat (5) ₂, V ₂The chamber inner air pressure raises, and has accumulated the forward impact energy, when this impact ends, impacts outer carrying and disappears V ₂Air under pressure expands in the chamber, and because of the existence of Fig. 2 b. damper is arranged, with the resilience that decayed of aforementioned damping ratio, because of the road surface descends suddenly, when meeting steep bank as wheel, sleeve is air bulging by compression rapidly, at this moment V ₂Fluid in the chamber also descends thereupon, the dam internal conical surface of outer conical surface wedging damper seat of plug of semi-floating, the fluid of having blocked under pressurized air promotes passes through, weakened the brunt of damping cylinder, guarantee that wheel contacts the spring stiffness of bumper when contacting over the ground, improve the direction control in the vehicle ', also can prevent the impact of upper and lower cover, improve the usage condition of part.

Claims

1, a kind of motor oil gas bumper, comprise shock strut (2), damping sleeve (8), it is characterized in that: pre-charging connector (1) and dividing plate (3) are housed in the upper end of shock strut, damper seat (5) and seal ring (6) are equipped with in its lower end, and the semi-floating plug (4) that dams, in the bottom centre of damping sleeve (8) push rod (7) is housed.

2, oleo-pneumatic shock absorber according to claim 1 is characterized in that: the dam coning angle of inside and outside circular conical surface of plug of damper seat and semi-floating is all 60 °～120 °.

3, oleo-pneumatic shock absorber according to claim 1 is characterized in that: the effective volume of the pillar cavity between dividing plate and damper seat to the damping sleeve in the ratio of pre-oil capacity volume be 1:1～0.8.

4, oleo-pneumatic shock absorber according to claim 1 is characterized in that: preliminary filling air pressure is 1.5～4.0 kg/cm; Hydro-pneumatic spring rigidity is 0.8～1.5 kilogram/millimeter.