JPH06513B2 - Motorcycle engine protector - Google Patents

Description

The present invention relates to an engine protection device for a motorcycle equipped with an engine guard.

(Prior Art) In a motorcycle, a front wheel is usually supported on a front portion of a body frame of the motorcycle, and an engine for driving a rear wheel is mounted in the frame of the same body frame (for example, JP-A-58-1289).
No. 78).

In the above configuration, when the motorcycle travels, stones or sand from the traveling road surface that is flipped up by the front wheels may collide with the outer surface of the front portion of the engine.

Therefore, an engine guard may be provided so as to cover the lower outer surface of the engine.

(Problems to be Solved by the Invention) By the way, it is desired that the engine be protected more effectively.

Therefore, it is conceivable to enlarge the engine guard to protect the lower part of the engine in a wide range.

However, if this is simply done, the engine guard becomes large, which may interfere with the engine guard, making it difficult to perform maintenance (inspection) work on the lower part of the engine.

(Object of the Invention) The present invention has been made by paying attention to the above circumstances, and makes the engine protection more effective, and even in such a case, the maintenance work of the lower part of the engine is facilitated. The purpose is to be able to.

(Structure of the Invention) A feature of the present invention for achieving the above-mentioned object is that the front edge and each side of the front portion of the engine guard cover the lower front surface of the front portion of the engine and the respective side surfaces of the upper and lower portions. While bending the edges upward, extend the rear part of the same engine guard backward so as to cover the lower rear end of the same engine, and connect the front and rear parts of the same engine guard to the body frame side, respectively. Among the rear connecting points, the engine guard can be rotated downward with respect to the body frame side around the rear connecting point.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

A motorcycle 1 has a front frame 3 on which a front fork 3 is supported. This front fork 3
A front wheel 4 is supported at the lower end of the front fork 3
The handle 5 is attached to the upper end of the
The front wheel 4 can be steered through the front fork 3 by the above operation.

On the other hand, a rear arm 7 is pivotally supported on the rear portion of the vehicle body frame 2 so as to be vertically swingable, and a rear wheel 8 is supported on a swing end of the rear arm 7. An engine 9 is mounted in the frame of the vehicle body frame 2, and the rear wheels 8 are driven by the engine 9. Reference numeral 10 is an exhaust pipe, 11 is a fuel tank, and 12 is a seat.

The vehicle body frame 2 will be described in more detail. The vehicle body frame 2 is a diamond-shaped frame, and a head pipe 1 for supporting the front fork 3 on its front portion.
Have three.

A main tube 15 projects from the upper part of the head pipe 13 toward the rear, and a down tube 16 projects from the lower part of the head pipe 13 toward the rear lower part.

Further, a pair of left and right seat pillar tubes 17 are provided so as to project downward from a midway portion of the main tube 15 in the front-rear direction, and a cross tube 18 is installed on the left and right seat pillar tubes 17, 17.

The engine 9 is installed between the lower ends of the down tube 16 and the seat pillar tube 17.

An engine guard 20 made of sheet metal is provided so as to cover the lower outer surface of the engine 9. The engine guard 20 has the front edge of the front portion of the engine guard 20 bent upward so as to cover the lower front surface of the front portion of the engine 9.

Further, each side edge of the front portion of the engine guard 20 is bent upward so as to cover each side surface of the lower portion of the front portion of the engine 9.

In the above case, the engine guard 20 has a guard main body 21 that covers the lower surface and the lower front surface of the engine 9, and guard side plates 22 and 22 that extend from both sides of the guard main body 21. It covers each side surface of the crankcase 9a that constitutes the lower part of the front part of the engine 9. Further, the guard side plate 22 also covers the side surface of the exhaust pipe 10.

The rear portion of the guard body 21 is extended rearward so as to cover the lower rear end of the engine 9.

The rear portion of the engine guard 20 is pivotally supported by the cross tube 18 via a pair of left and right pivot shafts 23. That is, the pivot 23 serves as a rear connecting point that connects the rear portion of the engine guard 20 to the vehicle body frame 2 side.

The front portion of the engine guard 20 is connected to the lower end of the down tube 16 via a connecting pin 24. That is, the connecting pin 24 serves as a front connecting point for connecting the front portion of the engine guard 20 to the vehicle body frame 2 side.

The connecting pin 24 is attachable to and detachable from the down tube 16 and the engine guard 20, and by removing the connecting pin 24, the engine guard 20 is attached to the pivot shafts 23, 23.
It is possible to rotate downward about the center.

The grounding of the turning end of the engine guard 20 due to the downward rotation and the grounding of the front wheel 4 allow the vehicle body to be self-supporting (shown by a chain double-dashed line in FIG. 1).

(Effect of the Invention) According to the present invention, the front edge and the side edges of the front portion of the engine guard are bent upward so as to cover the lower front surface of the front portion of the engine and the respective side surfaces of the upper and lower portions, Since the rear part of the engine guard is extended rearward so as to cover the lower end of the engine, the lower part of the engine is covered in a wide range. Therefore, the engine is broadly protected from the stones flipped up by the front wheels and the obstacles on the side of the engine.

Further, since the front and rear portions of the engine guard are respectively connected to the vehicle body frame side, the engine guard is supported on both the front and rear sides of the vehicle body frame side, so that the engine guard is more firmly supported. Therefore, also in this respect, the protection of the engine becomes more reliable.

By the way, if the lower part of the engine is widely protected by the engine guard as described above, or if the above engine guard is made stronger by firmly supporting the engine guard, the engine guard may become large. The maintenance work for the lower part of the engine may be obstructed by the engine guard, which may make the work difficult.

However, according to the present invention, the engine guard can be rotated downward with respect to the vehicle body frame side around the rear connecting point of the front and rear connecting points of the engine guard with respect to the vehicle body frame side. When attempting to do so, the front portion of the engine guard may be rotated downward about the rear connection point.

That is, in this case, the front portion of the engine guard tends to be large in size as described above, being formed so as to cover the lower front surface and each side surface of the front portion of the engine. Due to the downward rotation, the engine is largely separated from the engine. Therefore, the maintenance work for the lower part of the engine is performed without being disturbed by the large front part of the engine guard, that is, the maintenance work for the lower part of the engine is performed. It will be easy to do.

In addition, when the front wheel on the front side of the engine is steered to the left or right during the work, the rear portion of the front wheel is separated from the engine, and the working space for the engine is secured accordingly.

And, since this working space and the working space obtained by rotating the engine guard downward about the rear connection point are integrated with each other to form a large space with a lump, by utilizing this wide space, The above maintenance work becomes extremely easy.

That is, according to the present invention, as described above, the engine can be protected more effectively, and the maintenance work of the lower part of the engine can be performed very easily.

[Brief description of drawings]

1 shows an embodiment of the present invention, FIG. 1 is an overall side view of a motorcycle, FIG. 2 is a view taken along the line II-II in FIG. 1, and FIG. 3 is a line III-III in FIG. View from the arrow, Fig. 4 is IV-IV of Fig. 3.
FIG. 1 ・ ・ Motorcycle 2 ・ ・ Body frame 3 ・ ・ Front fork 4 ・ ・ Front wheel, 9 ・ ・ Engine, 20 ・ ・ Engine guard, 23 ・ ・ Pivot shaft (rear connecting point), 24 ・ ・
Connecting pin (front connecting point).

Claims (1)

[Claims] 1. A motorcycle in which a front wheel is steerably supported by a front portion of a vehicle body frame via a front fork, an engine is attached to a front and rear midway portion of the vehicle body frame, and an engine guard is provided to cover the engine from below. In the above, while bending the front edge and the side edges of the front portion of the engine guard upward so as to cover the lower front surface of the front portion of the engine and the respective side surfaces of the upper and lower portions thereof, up to the lower rear end of the engine. The rear part of the engine guard is extended rearward so as to cover it.The front part and the rear part of the engine guard are connected to the vehicle body frame side, respectively. An engine protection device for motorcycles that can rotate downward with respect to the body frame side.