JPH0115590Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to an anti-lift rear suspension unit with variable damping force that prevents the rear suspension unit supporting the rear wheels from elongating during braking.

A rear suspension unit is generally a shock absorber that supports the rear wheel of a motorcycle, and slides inside a cylinder and pulls out a piston rod equipped with a damping force generating mechanism to the outside of the cylinder, and then pushes the piston rod toward the piston rod side. A coil spring is interposed between a fixed spring holder and a spring holder provided on the outer periphery of the cylinder, so that the impact generated in the vertical direction of the wheel is alleviated. Furthermore, the front wheel is supported by the front fork, and when braking is applied while the motorcycle is running, the front fork is rapidly compressed and sinks significantly, causing the rear fork to lift at the same time, resulting in nose dive. As a result, there is a danger that the driver's vehicle may be thrown forward, and the sinking of the front fork reduces the effective stroke of the shock absorber, reducing the shock absorption effect of the shock absorber during braking. There were problems in that safety and buffering performance deteriorated. Various anti-nose diving front forks have been developed to solve this problem.

This invention proposes an anti-lift type rear traction unit with variable damping force for the purpose of preventing elongation during braking, which was considered in contrast to the anti-nose dive type front fork. A rocker arm that is actuated via a wire when the brake lever and/or brake pedal of a motorcycle is operated is fixed to the mounting bracket, and a link that adjusts the damping force by threading bolts and nuts and transmits the operation of the rocker arm. The gist of the present invention is to provide a mechanism, and a push rod which is slidably inserted into the piston rod and which operates in conjunction with the link mechanism to throttle the flow rate of the oil passage opened during the extension process by means of a needle at the upper end. .

Hereinafter, one embodiment of this invention will be described based on the accompanying drawings.

Figure 1 shows the anti-lift type rear compression unit of this invention, where 1 is a cylinder, 2 is a cylinder, and 2 is a cylinder.
3 is a piston that slides within the cylinder 1 and is equipped with a damping force generating mechanism; 3 is a piston rod; 4 and 5;
6 indicates a spring holder, and 6 indicates a coil spring. This rear compression unit is used with the left side up and the right side down. A mounting bracket 7 is fixed to the lower end of the piston rod 3, and the main parts of the anti-lift mechanism are provided on the mounting bracket 7. FIG. 2 is an enlarged view thereof, and FIG. 3 is a side view of FIG. 2.

A rocker arm 8 is provided to be able to swing freely using the lower end of the mounting bracket 7 as a fulcrum, and is configured to operate in the upward (arrow) direction via a wire 9 when the brake lever and/or brake pedal of the motorcycle is operated. . Further, an adjustment nut 10 is inserted through the mounting bracket 7 so as to be slidable in the vertical direction, and is externally fitted into the lower part of the adjustment nut 10.
A return spring 1 is interposed between the upper end surface of the adjusting knob 11 to be fixed and the enlarged diameter stepped portion of the hole of the mounting bracket 7 on which the adjusting nut 10 slides.
2, its lower end is always in contact with the other end of the loker arm 8. Asia Strode 13
Attach the lower bolt part to the adjuster nut 1 above.
It is screwed into the nut part of 0. Furthermore,
An adjuster plate 14 is provided to be able to swing freely using the upper part of the mounting bracket 7 as a fulcrum, and its other end is connected to the upper end of the adjuster rod 13 to form a link mechanism. The structure is such that it swings as shown by the arrow. On the other hand, a push rod 15 is slidably inserted into the piston rod 3, and its upper end needle 16 is directed toward an oil passage 17 that is opened during the extension process, and its lower end is connected to the adjuster plate 14 due to the internal pressure.
It is held in a pressed state. In addition, 1
8 is a nut for fixing the adjuster knob 11, 19 is a moderation sensing device consisting of a steel ball and a coil spring, and is used to ensure good setting when the adjuster knob 11 is rotated; 20 is a sliding length of the adjuster rod 13; This is a guide stopper for regulating the temperature.

In the anti-lift rear action unit constructed as described above, when the adjuster knob 11 is rotated, the adjuster nut 10 also rotates, and the adjuster rod 13, whose upper end is connected to the adjuster plate 14, has its lower bolt portion screwed into the nut portion of the adjuster nut 10. move upward or downward because they match. The movement of the adjuster rod 13 causes the adjuster plate 14 to move, thereby moving the push rod 15. The push rod 1
5 moves the needle 16 at the upper end to change the flow rate of the oil passage 17. However, the damping force can be adjusted. Furthermore, when the brake lever and/or brake pedal of the motorcycle is operated, the rocker arm 8 swings upward (indicated by the arrow) via the wire 9, pushing the adjuster nut 10 and adjuster rod 13 upward, and the adjuster plate 14
swing upward. Therefore, the push rod 15 is also moved upward, and the needle 1 at its upper end is moved upward.
6 to throttle or shut off the flow rate of the oil passage 17. Therefore, the damping force on the extension side is strengthened, preventing the rear suspension unit that supports the rear wheels from extending, and the weight of the rear wheels lowers the vehicle body to balance the front and rear and stabilize the vehicle body.

According to this invention, as mentioned above, an anti-lift mechanism is provided that operates directly on the brake and/or brake pedal of the motorcycle via a wire etc. during braking, and immediately increases the damping force on the extension side.
The rear suspension unit is prevented from stretching and provides good support for the rear wheels. Furthermore, the damping force can be adjusted, which is very useful in terms of handling stability and cushioning performance.

[Brief explanation of the drawing]

FIG. 1 is a partially longitudinal front view showing one embodiment of this invention, FIG. 2 is an enlarged view of the main part in FIG. 1, and FIG. 3 is a side view in FIG. 2. 1... Cylinder, 2... Piston, 3... Piston rod, 7... Mounting bracket, 8... Rocker arm, 9... Wire, 10... Adjuster nut, 11... Adjuster knob, 13... Adjuster rod, 14... Adjuster Strike plate, 15...
...Push Rod, 16...Needle, 17...
Oil passage that opens during the stretching process.

Claims (1)

[Scope of utility model registration request] A piston rod that slides inside the cylinder and is equipped with a damping force generation mechanism is pulled out of the cylinder, and a spring receiver is fixed to the piston rod side.
A rear suspension unit that has a coil spring interposed between it and a spring bearing provided on the outer periphery of the cylinder, is swingably provided around the lower end of a mounting bracket fixed to the lower end of a piston rod as a fulcrum, and is a brake for motorcycles. The Rocker arm is actuated via a wire by the operation of the lever and/or the brake pedal, and is slidably penetrated through the mounting bracket with the nut portion facing upward, and the lower end of the Rocker arm is constantly brought into contact with the other end of the Rocker arm due to the force of a spring. An adjusting nut that is in contact with the adjusting nut, an adjusting rod having a bolt portion screwed into the adjusting nut at its lower part, and an adjusting rod which is swingably provided with the upper part of the mounting bracket as a fulcrum, and whose other end is connected to the upper end of the adjusting rod. The mechanism includes an adjusting plate, and a push rod which is slidably inserted into the piston rod and is interlocked with its lower end in contact with the adjusting plate, and which uses a needle at its upper end to throttle the flow rate of the oil passage that opens during the extension process. An anti-lift type rear suspension unit with variable damping force.