JPS5933743Y2 - Motorcycle rear wheel suspension system - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rear wheel suspension system for a motorcycle.

In a motorcycle, the rear wheel can also move up and down, and a shock absorber is installed between the supporting swing arm and the vehicle body frame to absorb vibrations from the rear wheel when the vehicle is moving.

In general motorcycles, this shock absorber is installed on each side of the left and right rear wheels, but in competition vehicles, only one shock absorber is installed on the front of the rear wheel to reduce the weight of the vehicle body and increase the bank angle. There is something designed to do this.

Motorcycles with such a structure use a rear wheel suspension system that links the shock absorber and the body frame, but this rear wheel suspension system itself occupies a large amount of space in the center of the vehicle body. Moreover, since the cushion lever and the shock absorber, which form part of the link, swing up and down in that space, the space occupied by the carburetor, air cleaner, etc. installed in front or on the side of the force shock absorber is There was a problem with it being too narrow.

Therefore, it is necessary to use an air cleaner with a small volume, or to increase the volume, use an air cleaner that combines two elements that cover the surroundings of the shock absorber. The work is time consuming,
This posed the problem of reduced maintenance of air cleaners and carburetors.

The present invention solves the above-mentioned problems and provides a rear wheel suspension system for a motorcycle that minimizes the space occupied in the center of the vehicle body and increases the space occupied by parts such as the air cleaner. purpose.

Embodiments of the present invention will be described below with reference to FIG.

1 and 2 show a first embodiment of the present invention, in which 1 is a vehicle body frame, 2 is an upper frame forming a part of the vehicle body frame 1, and 3 is a lower part extending downward from the upper frame 2. It is a frame.

Above the upper frame 2, a seat 4 indicated by a dashed line in the figure is arranged.

Attach the front end to the left and right lower frames 3, 3 # pivot shaft 5
Although not shown in the rear end view, the swing arm 6, which is pivotally connected via the swing arm 6, supports the wheel.

At the top of the lower frames 3, 3, the left and right lower frames 3, 3
The cushion lever 7, which is pivotally mounted with an intermediate portion 7a interposed therebetween, is rotated by F around a shaft 8 extending F in the direction of the inside of the vehicle.

The shape of the cushion lever 7 is V-shaped when viewed from the front, and as shown in FIG. 2 when viewed from above.

In other words, the intermediate portion 7a extending in the inside direction of the vehicle;
From the vicinity of both ends of a, it spreads diagonally backward by 1 inch, and from the rear part 7b, 7b, and the front part 7c, whose axis is eccentric with respect to the center t in the longitudinal direction of the intermediate part 7a, and extends forward t with a displacement of f. Become.

The tip of the front portion 7c and the swing arm 6 are connected via a shaft 9 by a shock absorber 10, and the shock absorber 10 is positioned within the longitudinal center of the intermediate portion 7a.

On the other hand, the rear ends of the two rear portions 7b, 7b and the swing arm 6.6 are connected by two cushion rods 11, 11.

In the figure, 12, 13, and 14 are axes. An air cleaner 1 in the shape of a rectangular plane is located below the position where the cushion lever 7 is connected to the vehicle body frame 1 and is located close to the shock absorber 101.
5 is provided, and a cab brake 1 is located in front of it.
It is connected to 6.

Note that, in the illustrated example, the front part 7c of the cushion lever 7 is located at a position t, which is displaced by t to the left of the center t of the intermediate part 7a; You may.

In the case where the air cleaner 15 is located one position on the right side, it is inevitable that the air cleaner 15 is located one position on the left side of the front part 7cf.
The shape is adapted to that space.

A second embodiment of the present invention shown in FIG. 3f has the shapes of the cushion lever 1 and cushion rod 11 shown in FIG. There is no significant difference from what was shown).

In this example, the rear part 7b' of the cushion lever 7 has a single rond shape, and the upper rod 11'a and the shaft 13 forming the U-shaped cushion rod 11'.
On the other hand, two lower rods ll'b, ll'b extending downward t from the upper rod 11'a are connected to the swing arm 6.6.

According to this embodiment 1, the rear space of the cushion lever 7 can be made wider than that of the first embodiment 1, and the air cleaner 15' has a larger capacity.
It is also possible to use this method.

The third embodiment of the present invention shown in FIG.
C' is made into a truss structure to increase the strength of the cushion lever 7, and its functions and effects are the same as those of the other embodiments described above.

Next, the operation of the rear wheel suspension system of the present invention will be explained using the first embodiment as Example F.

For a motorcycle equipped with a rear thermal suspension system of the present invention,
When the vehicle receives an impact from the road surface while driving, the swing arm 6 moves upward and downward due to the vibration of the wheels (not shown).

As a result of this movement of the swing arm 6, the cushion lever 7 rotates once clockwise or counterclockwise about the shaft 9 in FIG. Activates the shock absorbing function to absorb vibrations from the rear wheels.

At this time, the shock absorber 10, cushion lever 7, and cushion rod 11 that constitute the rear wheel suspension system operate smoothly without interfering with the operation of the surrounding air cleaner 15, carburetor 16, etc.

The rear wheel suspension system of the present invention constructed as described above provides the following effects.

In other words, ('r) the connecting position of the front part of the cushion lever and the shock absorber is displaced by one center of the intermediate part by the displacement f, so the space occupied by the rear wheel suspension system in the center of the vehicle is It is smaller than the conventional one, and it is possible to install an air cleaner with a capacity as large as possible compared to the conventional one.

Moreover, since the air cleaner only requires one element, its installation is easy and the maintenance of the air cleaner carburetor etc. is greatly improved.

(b) In addition, the shock absorber that forms part of the rear wheel suspension system is
The shock absorber itself can be easily installed and removed, and the shock absorber itself can be easily installed and removed. It also becomes easier to install the muffler in the center.

[Brief explanation of drawings]

Fig. 1 is a front view showing the first embodiment of the present invention, Fig. 2 is a plan view showing the rear wheel suspension system shown in Fig. 1, and Fig. 3 is a plan view showing the second embodiment of the invention. , FIG. 4 is a plan view showing a third embodiment of the present invention. 1...Vehicle frame, 3...Lower frame, 6...Swing arm, 7...
Cushion lever, 7a... middle part, 7b...
...Rear part, 7c...Front part, 10...
...Buffer, 11...Cushion rod, "
...within displacement.

Claims (1)

[Scope of utility model registration request] A cushion lever is interposed which rotates by pivotally connecting an intermediate portion between the left and right sides of the vehicle body frame, and a rear portion of the cushion lever and a front end portion below the cushion lever are pivotally connected to the vehicle body frame f. When a part of the swing arm is connected with a cushion rod, the cushion is connected to the cushion with a shock absorber positioned at a distance f toward either the left or right side of the vehicle body frame with respect to the center in the longitudinal direction of the intermediate portion. A rear wheel suspension system for a motorcycle, characterized in that a front part of a lever and another part of the swing arm are connected.