JPH0344036B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a self-leveling damper for a two-wheeled vehicle that prevents changes in vehicle height when the two-wheeled vehicle is parked.

This type of self-leveling damper introduces pressure oil generated in the oil chamber inside the cylinder via a check valve, and is equipped with a hydraulic spring adjuster that adjusts the spring load using the pressure oil. During loading, the spring load is increased by the action of the spring adjuster.

By the way, in the case of conventional dampers of this type,
When two people ride as described above, when the vehicle is loaded with luggage and the vehicle is dismounted or the luggage is removed, the damper will be fully extended, and then the pressure oil in the spring adjuster will gradually return to the oil chamber in the cylinder. A situation occurs where the vehicle height decreases over time, which is particularly problematic when the vehicle is parked with the side stand on.

That is, when the motorcycle is parked on the side stand, the height of the vehicle decreases over time, which reduces the stability of the vehicle's posture during parking, and may even cause the motorcycle to fall over depending on the road surface conditions.

The present invention was made to effectively solve this problem, and its purpose is to prevent changes in vehicle height when parking a motorcycle and to maintain stability of the vehicle body even when parked on the side stand. To provide a self-leveling damper for a two-wheeled vehicle.

In order to achieve such an object, the present invention provides a two-wheeled vehicle equipped with a hydraulic spring adjuster that introduces pressure oil generated in an oil chamber in a cylinder via a check valve and adjusts a spring load using the pressure oil. The self-leveling damper is provided with a check valve opening mechanism that opens the check valve when the motorcycle is used on a side stand. The gist is that the check valve is connected to the side stand via a wire cable, and the other end is connected to the check valve via a rod.

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

The drawing is a longitudinal sectional side view of the self-leveling damper according to the present invention, in which 1 indicates inner and outer cylinders 2 and 3.
This cylinder has a double cylindrical structure, and a piston rod 4 is inserted into the inner cylinder 2 from above as shown in the figure, and the piston rod 4 fits into the lower part of the inner cylinder 2 so as to be vertically slidable. A piston 5 is connected. The piston 5 is provided with a valve mechanism 6 that generates a damping force.

Furthermore, an oil seal 7 and a rod guide 8 are fitted on the inner periphery of the upper part of the cylinder 1 so as to be in sliding contact with the outer periphery of the piston rod.

On the other hand, a pipe 9 is installed in the lower part of the cylinder 1, and the upper end of the pipe 9 is slidably fitted into a fitting hole 4a formed in the piston rod 4 as shown in the figure. An oil chamber A is formed at the lower end of the cylinder 1, and the oil chamber A is intermittently connected to the pipe 9 through a check valve 10 provided therein.
It communicates with the inner oil passage 9a.

The inside of the cylinder 1 is divided into an internal cylinder oil chamber B and a reservoir chamber C, each of which is filled with hydraulic oil, and in particular the upper part of the reservoir chamber C is filled with gas.

As shown in the drawing, an upper metal 11 is connected to the upper end of the piston rod 4, and a spring seat 12 is connected around the metal 11. In addition, 13 in the figure is a stopper lever.

A lower metal 14 is connected to the lower part of the cylinder 1, and the upper end of the piston rod 4 of the damper is connected to the vehicle body side of the two-wheeled vehicle via the upper metal 11, and the lower end of the cylinder 1 is connected to the body side of the motorcycle via the upper metal 11. The piston rod 4 and the cylinder 1 are connected to the wheel side, and the piston rod 4 and the cylinder 1 move relative to each other.

By the way, a hydraulic spring adjuster 20 is provided on the lower outer periphery of the cylinder 1. In this spring adjuster 20, 21 is a guide member whose lower end is tied to the outer periphery of the cylinder 1 and which is open at the top. There is.

The area surrounded by the guide member 21 and the adjuster 22 constitutes a pressure chamber D as shown in the figure, and the pressure chamber D includes an oil hole 3a bored in the side wall of the outer cylinder 3 and an oil hole 3a bored in the side wall of the fixing member 15. It communicates with the oil chamber A through the oil holes 15a. In addition, 23 in the figure is a cover.

The cylinder 1 is mounted on the top surface of the adjuster 22.
A spring seat 16 that fits vertically and slidably is in contact with the outer periphery, and a coil spring 17 is stretched between the spring seat 16 and the spring seat 12.

On the other hand, a check valve opening mechanism 30 is provided at the bottom of the cylinder 1.
is provided. In this check valve opening mechanism 30, 31 is a stay 3 protruding from the lower end of the cylinder 1.
One end of the arm 31 is connected to the side stand 50 of the two-wheeled vehicle via a wire cable 33, and the other end is connected to the side stand 50 of the two-wheeled vehicle via a rod 34. It is connected to the check valve 10.

Therefore, when two people are riding or when cargo is loaded, the pipe 9 enters the fitting hole 4a of the piston rod 4, and the pressure oil generated thereby flows into the oil passage 9 in the pipe.
a, is introduced into the pressure chamber D of the spring adjuster 20 through the check valve 10, the chamber A, and the oil holes 15a..., 3a. The pressure of the pressure oil introduced into the pressure chamber D causes the adjuster 22 to move upward, compressing the spring 17 and increasing its load.

After that, if you get off the vehicle or remove your luggage,
The damper is once fully extended, but when the side stand 50 is applied, the wire cable 33 causes the arm 31 to swing in the direction of the arrow shown (counterclockwise), and this swing causes the rod connected to one end of the arm 31 to swing. The rod 34 moves downward, and the check valve 10 is forcibly opened by this downward movement of the rod 34. By opening this check valve 10, the pressure oil in the pressure chamber D of the spring adjuster 20 is released from the check valve 10.
As a result, the set load of the spring 17 instantly returns to its original value, and the damper, which was in the fully extended state, returns to the minimum set state, and the vehicle height is adjusted low. Ru.

As described above, when the vehicle is parked with the side stand 50 on, the height of the vehicle is instantly lowered, so the stability of the body posture of the two-wheeled vehicle is ensured, and the worst-case scenario, such as the two-wheeled vehicle falling over, is avoided.

In the above embodiments, a wire type check valve opening mechanism was used, but other types such as hydraulic or electric types may also be used as the mechanism.

As is clear from the above description, according to the present invention, a self-leveling damper is provided with a check valve opening mechanism to instantly return the pressure oil in the spring adjuster to the oil chamber in the cylinder when parking on the side stand. This prevents the vehicle height from changing when the motorcycle is parked, and ensures the stability of the vehicle even when the motorcycle is parked on the side stand.

[Brief explanation of drawings]

The drawing is a longitudinal sectional side view of a self-leveling damper according to the present invention. In the drawing, 1 is the cylinder, 4 is the piston rod,
5 is a piston, 9 is a pipe, 10 is a check valve, 17
20 is a coil spring, 20 is a hydraulic spring adjuster, 21 is a guide member, 22 is an adjuster, 30 is a check valve opening mechanism, 31 is an arm, 33
is a wire cable, 34 is a rod, and 50 is a side stand.

Claims (1)

[Claims] 1. In a self-leveling damper for motorcycles, which is equipped with a hydraulic spring adjuster that introduces pressure oil generated in the oil chamber in the cylinder via a check valve and adjusts the spring load using the pressure oil, when the motorcycle is used on a side stand. , a check valve opening mechanism for opening the check valve is provided, and the check valve opening mechanism has an arm pivotably attached to the damper body, and one end of the arm is connected to the side stand via a wire cable. A self-leveling damper for a two-wheeled vehicle, characterized in that the other end is connected to the check valve via a rod.