JP3186153B2 - Motorcycle engine mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine mounting device for a motorcycle.

[0002]

2. Description of the Related Art In a motorcycle, when a main tube at the front upper portion of a frame is composed of a single tube, a bracket is fastened by projecting downward from the main tube, and an upper end of an engine is fastened to the bracket. I try to wear it. or,
When the main tube of the frame has a pair of left and right sides, the upper end of the engine is not fastened to the frame.

[0003]

In the case where the main tube of the frame is composed of one piece, the main tube passes right above the engine, so that the maintainability of the engine is deteriorated. Further, if the upper end of the engine is not fastened to the frame, there is a problem that the generation of vibration increases.

In view of the above, according to the present invention, the front portions of the main tubes of the pair of left and right frames are laterally connected by a bridge, and the upper end of the engine is fastened to the bridge via a bracket formed in a U-shape. It is another object of the present invention to provide a motorcycle engine mount device that has good maintainability of the engine and high vibration damping effect.

[0005]

In order to achieve the above object, an engine mounting device for a motorcycle according to the present invention is provided.
Main tube extending rearward behind the head pipe
Engine below the main tube of the frame with the
In the motorcycle equipped with the engine, the main tube is constituted by a pair of left and right and an upper left part of the engine.
Extend the right side in the front-rear direction, and
And the main tubes on the left and right.
It is connected via a bridge that extends in the width direction of the vehicle at a position forward of the upper part of the engine.
Bracket with a U-shape that opens rearward
From the center in the vehicle width direction to the upper end of the engine behind.
The left and right main tubes substantially parallel to extend What is fastened to the rear end portion of the <br/> bracket to the upper end of one engine
The front end is detachably fastened to the bridge
Then, the tightening axis is moved up with respect to the main tube.
The bracket is formed to be inclined, and the bracket is fastened from the rear side .

[0006]

Since the main tube does not pass directly above the engine, the head cover at the upper end of the engine can be removed together with the bracket, thereby improving the maintainability. Also, since the upper end of the engine is fastened to the bridge via the bracket, the generation of vibration can be suppressed, and the vibration can be reduced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Extends backwards behind the head pipe
Under the main tube of the frame with the main tube
The motorcycle equipped with an engine toward the front of the frame, the front of the pair of left and right main tubes 1, en
The bridge 2 extending in the vehicle width direction at a position forward of the upper portion of the gin 8 is laterally connected and welded , and the upper portion of the engine 8 is welded.
The left and right sides extend in the front-rear direction, and the upper part of the engine 8 is left and right.
And the front side of the bridge 2 is welded to the head pipe 4 by welding the upper, lower, left and right tubes 3. Then, the upper end of the down tube 5 is welded to the head pipe 4, and the upper ends of the left and right side down tubes 6 are welded to both sides of the bridge 2. A shaft cylinder 7 is welded to the lower end of the down tube 5 and the lower end of the left and right side down tubes 6 to fasten the front end of the engine 8.

At the center of the bridge 2, a stay 9 is welded toward the rear side, and the left and right are connected to the stay 9 at the front end in plan view.
To the front of the bracket 10 formed in a U-shape that opens rearward
The center part in the width direction of the body at the end and the rear side above the engine
The bolt is fastened to the end 10a . The bracket 1
0 at the rear end 10b from the center in the vehicle width direction.
Flat with the left and right main tubes 1 toward the upper end of the gin
Extending in the row, the boss 12 provided in the head cover 11 of the upper end of the engine 8, sandwiched from both sides by the rear end 10b, to fastened through bolts from the lateral direction. Take with the bolt
Attach the fastening axis 10c to the main tube 1.
On the other hand, it is formed so as to be inclined backward.

The upper end of the engine 8 is fastened to the bridge 2 of the frame via the bracket 10, so that the vibration of the engine 8 can be suppressed and the vibration can be reduced. Further, the pair of main tubes 1 are not directly above the engine 8, and the head cover 11 at the upper end of the engine 8 can be removed together with the bracket 10, thereby improving the maintainability of the engine 8.

The bridge 2 of the left and right main tubes 1
Since the front side is welded to the head pipe 4 by four tubes 3 of up, down, left and right, the frame rigidity can be increased. The fuel tank 1 is located above the left and right main tubes 1.
3, the position of the main tube 1 can be lowered, so that the capacity of the fuel tank 13 can be increased.

[0011]

As described above, since the present invention is constructed as described above, the left and right main tubes 1 are not directly above the engine 8 and the head cover 1 at the upper end of the engine 8 is not provided.
The bracket 1 can be removed together with the bracket 1, thereby improving the maintenance. Further, since the upper end of the engine 8 is fastened to the bridge 2 of the frame via the bracket 10, engine vibration can be suppressed and vibration can be reduced. Further, the rigidity of the frame is high, and the capacity of the fuel tank can be increased.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part showing an embodiment of the present invention.

FIG. 2 is a side view of a main part showing an embodiment of the present invention.

FIG. 3 is a side view of a frame alone showing an embodiment of the present invention.

FIG. 4 is an overall side view showing an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main tube 2 Bridge 8 Engine 9 Stay 10 Bracket

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Claims (1)

(57) [Claims] 1. A rearwardly extending rear side of a head pipe.
Under the main tube of the frame with the main tube
The motorcycle equipped with an engine towards, together with the main tube is constituted by a pair,
The upper left and right sides of the engine extend
With the top of the gin facing between the left and right main tubes,
With the main tube in front of the engine
Connected via a bridge extending in the width direction of the body , connected to the left and right at the front end in plan view
Is the bracket that has been formed the center of the bridge in the vehicle width direction?
To the upper end of the engine.
Over Bed substantially parallel to extend and fastened to the rear end portion of the bracket to the upper part of the engine
On the other hand, when the front end is detachably fastened to the bridge,
At the same time, the tightening axis should be
An engine mounting device for a motorcycle, characterized in that the bracket is formed to be inclined and the bracket is tightened from the rear side .