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US 5,988,655 AGranted
Vehicular height adjusting device
AssigneeKayaba Kogyo Kabushiki Kaisha
InventorsShizuka Sakai, Seiichiro Komatsu
Life of this patent
Estimating the term…
Abstract
According to the present invention there is provided a vehicular height adjusting device capable of diminishing a shock caused by a sudden change in pressure of an accumulator oil chamber at the time of adjusting the vehicular height to adjust the vehicular height in a gentle manner and capable of diminishing a beat noise of an opening/closing valve generated by the vehicular height adjusting operation, thereby improving the comfortableness.
Claims5
In a vehicular height adjusting device comprising:
- a shock absorber disposed between the body of a vehicle and an axle;
- an accumulator mounted within the shock absorber and communicating therewith;
- a pump mechanism for supplying pressure oil to the shock absorber and the accumulator;
- and
- a control orifice formed in the shock absorber to control the height of the shock absorber,
- said shock absorber comprising a cylinder, an outer shell disposed outside the cylinder, a reservoir defined between the cylinder and the outer shell, a hollow piston rod inserted into the cylinder movably through a piston valve, a rod-side oil chamber, and an antirod-side oil chamber, the rod-side oil chamber and the antirod-side oil chamber being partitioned from each other within the cylinder by means of the piston valve,
- said pump mechanism comprising a pump cylinder disposed within the piston rod and a hollow pump rod extending upright from the bottom of the cylinder, the pump mechanism supplying in its extending and retracting operations pressure oil in the reservoir to both a shock absorber-side oil chamber and an accumulator-side oil chamber, and
- said control orifice causing the accumulator-side oil chamber to communicate with the reservoir at a predetermined position to set the shock absorber at a predetermined height,
- the improvement characterized in that an induction valve is mounted at an upper end portion of the pump rod, and said pump mechanism operates in only an area in which a suction port formed on the downstream side of said induction valve is not closed by an upper end portion of the pump cylinder.
6 more elements
In a vehicular height adjusting device comprising:
- a shock absorber disposed between the body of a vehicle and an axle;
- an accumulator mounted within the shock absorber and communicating therewith;
- a pump mechanism for supplying pressure oil to the shock absorber and the accumulator;
- and
- a control orifice formed in the shock absorber to control the height of the shock absorber,
- said shock absorber comprising a cylinder, an outer shell disposed outside the cylinder, a reservoir defined between the cylinder and the outer shell, a hollow piston rod inserted into the cylinder movably through a piston valve, a rod-side oil chamber, and an antirod-side oil chamber, the rod-side oil chamber and the antirod-side oil chamber being partitioned from each other within the cylinder by means of the piston valve,
- said pump mechanism comprising a pump cylinder disposed within the piston rod and a hollow pump rod extending upright from the bottom of the cylinder, the pump mechanism supplying in its extending and retracting operations a pressure oil in the reservoir to both a shock absorber-side oil chamber and an accumulator-side oil chamber, and
- said control orifice causing the accumulator-side oil chamber to communicate with the reservoir at a predetermined position to set the shock absorber at a predetermined height,
- the improvement characterized in that a base end portion of the pump cylinder inserted into the hollow portion of the piston rod is supported swingably through a plate spring disposed between the lower end surface of the piston rod and a flange portion formed at the lower end of a piston nut which is threadedly engaged with a lower end portion of the piston rod.
6 more elements
In a vehicular height adjusting device comprising:
- a shock absorber disposed between the body of a vehicle and an axle;
- an accumulator mounted within the shock absorber and communicating therewith;
- a pump mechanism for supplying a pressure oil to the shock absorber and the accumulator;
- and
- a control orifice formed in the shock absorber to control the height of the shock absorber,
- said shock absorber comprising a cylinder, an outer shell disposed outside the cylinder, a reservoir defined between the cylinder and the outer shell, a hollow piston rod inserted into the cylinder movably through a piston valve, a rod-side oil chamber, and an antirod-side oil chamber, the rod-side oil chamber and the antirod-side oil chamber being partitioned from each other within the cylinder by means of the piston valve,
- said pump mechanism comprising a pump cylinder disposed within the piston rod and a hollow pump rod extending upright from the bottom of the cylinder, the pump mechanism supplying in its extending and retracting operations a pressure oil in the reservoir to both a shock absorber-side oil chamber and an accumulator-side oil chamber, and
- said control orifice causing the accumulator-side oil chamber to communicate with the reservoir at a predetermined position to set the shock absorber at a predetermined height,
- the improvement characterized in that a plate spring is disposed between a collar connected to the outer surface of the lower end of the pump rod which extends upright from a base guide fitted in the cylinder bottom and a stopper connected to an upper end portion of the base guide, to hold the pump rod swingably.
6 more elements
Dependencies are inferred from the claim text.