JPH0234432Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a motorcycle equipped with a V-type engine.

[Conventional technology]

In motorcycles equipped with a V-type engine that forms a V-shape in the longitudinal direction with respect to the direction of travel of the vehicle, the rearward-tilted cylinders are not cooled sufficiently because the running air is blocked by the forward-tilted cylinders. There is a problem.

In the conventional V-type engine 1 shown in FIG. 2, the cylinder block 3 of the forward-tilting engine section 2 is arranged offset to the right with respect to the cylinder block 5 of the rear-tilting engine section 4.

Cylinder block 3 in forward tilted engine section 2
The cylinder 6 is arranged in the left area of the cylinder block 5, and the front cam chain 8 is arranged in the right area, while the rear cam chain 9 is arranged in the left area of the cylinder block 5 in the rearward tilted engine section 4, and the cylinder 7 is arranged in the right area. is located.

The power transmitted from the pistons 10 and 11 to the crankshaft 12 is transmitted from a crank gear 13 provided at the right end of the crankshaft 12 to a clutch 15 via a clutch gear 14, and then to a primary shaft (not shown). communicated.

By the way, in this V-type engine 1, as shown in the figure, the amount of offset between the forward-tilting engine section 2 and the rear-tilting engine section 4 is extremely small.

Therefore, the width (area) S2 of the portion of the rearward tilted engine section 4 that receives the traveling wind from the front without being obstructed by the forward tilted engine section 2 is extremely small, and the rearward tilted engine section 4 is sufficiently cooled. Not done.

FIG. 3 shows a V-type engine 20 provided to solve the above-mentioned disadvantages.

In this V-type engine 20, the forward tilted engine section 2
1, the cylinder block 22 of
It is arranged offset to the right side in the figure with respect to the cylinder block 24 of No. 3.

The cylinder 25 is disposed in the left region of the cylinder block 22 in the forward-tilting engine section 21, and the front cam chain 28 is disposed in the right region. A rear cam chain 27 is arranged on the right side of the cylinder 26.

Further, the power of the crankshaft 12 is transmitted through a crank gear 13 provided at the right end of the crankshaft 12.
The signal is then transmitted to the clutch 15 via the clutch gear 14.

[The problem that the idea attempts to solve]

The V-type engine 20 having the above configuration has the same overall width W including the clutch 15 as compared to the V-type engine 1 shown in FIG. The width (area) of the receiving part varies from S2 (see Figure 2) to S.
It has increased slightly to 3.

However, even with the above configuration, the backward tilting engine section 23 is not sufficiently cooled.

In view of the above-mentioned circumstances, an object of the present invention is to provide a motorcycle equipped with a V-type engine that can more effectively cool the rearwardly inclined cylinder portion.

[Means to solve the problem]

Therefore, in the present invention, the front cam chain of the forward-slanted cylinder section and the rear cam chain of the backward-slanted cylinder section are arranged on the same side of the V-type engine, and the front cam chain and rear cam chain are connected to the crankshaft. The above object was achieved by arranging the crank gear on both sides of the shaft.

[Effect]

According to the above configuration, it is possible to largely offset the forward tilting cylinder portion from the rearward tilting cylinder portion, and it is possible to increase the portion of the rearward tilting engine portion that receives the traveling wind from the front.

〔Example〕

Hereinafter, the present invention will be explained based on the drawings showing one embodiment.

FIG. 1 shows an exploded view of a V-type engine 30 mounted on a motorcycle according to the present invention.

Similar to the V-type engine 20 shown in FIG. 3, this V-type engine 30 has a cylinder block 32 of a forward-tilting engine section 31 offset to the right with respect to a cylinder block 35 of a rear-tilting engine section 34. ing.

The cylinder 33 is arranged in the left region of the cylinder block 32 in the forward-tilting engine section 31, and the front cam chain 37 is arranged in the right region, while the left region of the cylinder block 35 in the backward-tilting engine section 34 is arranged A rear cam chain 38 is arranged in the area to the right of the cylinder 36.

Therefore, the cylinder block 32, cylinder 33, and front cam chain 37 of the forward-tilting engine section 31 are offset to the right with respect to the cylinder block 35, cylinder 36, and rear cam chain 38 of the rear-tilting engine section 34, respectively. The front cam chain 37 and the rear cam chain 38 are both arranged on the same side of the V-type engine 30 (the right side in the figure).

Furthermore, as is clear from the figure, the front cam chain 37 and the rear cam chain 38 are connected to the crank gear 3 provided on the crankshaft 40.
9 are arranged on the axis of the crankshaft 40 in such a manner that they are sandwiched from the right and left sides.

The crank gear 39 meshes with a clutch gear 41, and the power of the crankshaft 40 is transmitted to the clutch 42 via the crank gear 39 and the clutch gear 41, and then to a primary shaft (not shown).

Here, as clearly shown in the figure, the front cam chain 37 in the forward-inclined engine section 31 is disposed to the right of the crank gear 39, in other words, on the outer side of the engine than the crank gear 39. The entire tilted engine section 31 is disposed with a large offset to the right with respect to the rearward tilted engine section 34.

As a result, the width (area) S1 of the portion of the backward-tilting engine section 34 that receives the traveling wind from the front can be increased, and as a result, the rearward-tilting engine section 34 is sufficiently cooled by the traveling wind.

Further, according to this V-type engine 30, the second
Conventional V-type engine 1, 20 shown in Fig. 3
In this case, a dead space with a width H defined between the cylinder side surface of the forward-inclined engine section and the end surface of the clutch is effectively utilized.

For this reason, the V-type engine 3 including the clutch
Although the overall width W of the engine 0 is the same as the overall width of the V-type engines 1 and 20 shown in FIGS. The width (area) S1 of the receiving portion is
The widths are significantly increased compared to the widths S2 and S3 at .

[Effect of idea]

As described in detail above, according to the motorcycle according to the present invention, the front cam chain of the forward-tilting cylinder part and the rear cam chain of the rear-tilting cylinder part of the V-type engine are connected to the same side part of the V-type engine. At the same time, the front cam chain and the rear cam chain are arranged on the axis of the crankshaft with the crank gear sandwiched between them, so that the forward-slanted cylinder section of the V-type engine is aligned with the rear-slanted cylinder section. It becomes possible to offset the vehicle by a large amount, and it is possible to increase the area of the part of the rearward tilted engine section that receives the traveling wind from the front.

As a result, the rearwardly inclined cylinder portion is sufficiently cooled by the wind generated when the motorcycle is traveling.

[Brief explanation of the drawing]

FIG. 1 is an exploded conceptual diagram showing a V-type engine mounted on a motorcycle related to the present invention, and FIGS. 2 and 3 are conceptual diagrams each showing a conventional V-type engine developed. . 30... V type engine, 31... Forward tilted engine section, 33... Cylinder, 34... Backward tilted engine section, 36... Cylinder, 37... Front cam chain, 38... Rear cam chain, 39... Crank gear, 40...crankshaft, 41...clutch gear, 42...clutch.

Claims (1)

[Scope of Claim for Utility Model Registration] In a motorcycle equipped with a V-type engine such that a forward-tilting cylinder portion and a rear-tilting cylinder portion are juxtaposed along the traveling direction of the vehicle body, the front cam chain of the forward-tilting cylinder portion and The rear cam chain of the backward-inclined cylinder portion is arranged on the same side of the V-type engine, and the front cam chain and the rear cam chain are placed on the axis of the crankshaft, with the crank gear in between. A motorcycle characterized by being equipped with a V-type engine arranged in a double-sided configuration.