JPS5837702Y2 - Motorcycle clutch device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a clutch arrangement structure in a motorcycle.

Conventionally, some motorcycles have a dynamic unit consisting of an engine, a clutch, and a transmission mounted on the front part of the vehicle body, and the crankshaft of the engine of the unit is arranged parallel to the traveling direction of the vehicle body.

If the engine cooling system of the above-mentioned motorcycle is an air-cooling type, the engine is positioned as far forward as possible in the vehicle body so that the engine is easily exposed to the traveling wind, in order to prioritize engine cooling over clutch maintainability. .

However, with this type of engine arrangement, the clutch is inevitably located at the rear of the engine, but in the case where the crankshaft is arranged parallel to the direction of travel of the vehicle as described above, the clutch is usually located at the rear of the engine. A transmission and a drive shaft for driving the rear wheels are provided at the rear.

For this reason, when servicing the clutch, the transmission, drive shaft, rear wheel, etc. get in the way, making it extremely difficult to maintain the clutch, and there is also the problem that it is difficult for the clutch to be cooled because it is difficult for the running air to hit the clutch, which generates heat due to intermittent operation. there were.

On the other hand, when the engine is water-cooled, the engine can be sufficiently cooled by the radiator without relying on the running wind, so the engine can be located relatively rearward of the vehicle body compared to an air-cooled engine.

Therefore, the clutch can be located in front of the engine to improve its maintainability and cooling efficiency, but if the latch is arranged in this way, the following problems occur in relation to the radiator.

That is, since the hot air that has passed through the radiator flows behind the radiator, it is not preferable to install the clutch there from the viewpoint of cooling performance.

However, if the clutch is located above the radiator in consideration of this point, problems such as a rise in the center of gravity of the motorcycle and impaired running stability will occur.

Furthermore, if the clutch is located on the side of the radiator, the width of the entire moving crab unit becomes wider, resulting in problems such as an increase in the size of the unit and a decrease in the so-called bank angle when the motorcycle is running.

The present invention provides a motorcycle equipped with the above radiator,
By positioning the clutch in front of the engine and below the radiator to create a ventilation space in front of the clutch, the center of gravity of the motorcycle does not become high or the moving clutch becomes large, making the clutch easier to maintain. and to improve cooling performance.

-fIl according to the present invention will be explained with reference to the drawings. In FIG. 1, A is a vehicle body and B is a moving crab knit.

The moving crab unit B includes an engine 1, a clutch 5, and a transmission 6, and is mounted at the front of the vehicle body A, specifically below the fuel tank a and behind the down tube b.

7 is a drive shaft, and this drive shaft γ
The power from the moving unit B, that is, the engine 1 is transmitted to the rear wheels 8.

The engine 1 is a so-called horizontally opposed six-cylinder engine in which three cylinders are arranged horizontally opposite to each other on the left and right sides with respect to the traveling direction of the motorcycle, and its crankshaft 2 is parallel to the traveling direction of the vehicle body A. It is located in

Reference numeral 9 denotes a radiator that cools the engine 1, and is attached to a down tube b that constitutes the front part of the vehicle body A and is located in front of the power unit B.

3 is a crankcase, and inside this crankcase 3 there is a crankshaft 2 constituting the engine 1;
A gear mechanism 4 that directs the rotation of
and a clutch 5 are housed.

Therefore, in such a motorcycle, the clutch 5 is located in front of the engine 1 and below the radiator 9, that is, in close proximity to the lower end of the down tube b.

The clutch 5 is placed below the radiator 9, and a ventilation space is formed in front of the clutch 5, so hot air passing through the radiator 9 does not hit the clutch 5, and an appropriate space is provided between it and the front wheel C. Clutch 5 is easily hit by the wind from the vehicle.

3 is a front cover of the crankcase 3 that covers the clutch 5, and as soon as this cover 3' is removed, the clutch 5 can be removed.
is starting to appear.

The present invention focuses on the fact that in vehicles where the engine is cooled by a radiator, such as on a diagonal, the engine can be located relatively rearward of the vehicle body, and the clutch is located in front of the engine and below the radiator. Since the clutch is provided separately, the maintenance of the clutch can be improved significantly without the need for the conventional transmission, drive shaft, rear wheels, etc., to get in the way.

Furthermore, since a ventilation space is formed in front of the clutch by the above-described arrangement structure, the clutch can avoid the hot air that has passed through the radiator, and the clutch can be easily hit by running air, improving the cooling performance of the clutch.

Further, if the clutch is located in front of the engine and below the radiator, problems such as the center of gravity of the motorcycle becoming high and the moving clutch becoming large will not occur.

Therefore, the intended purpose can be achieved.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the structure of the present invention, and FIG. 2 is a partially cutaway enlarged view of the main part. In addition, in the figure, A...car body, B...moving crab knit, b...
・Down tube, 1...engine, 2...crankshaft, 5...clutch, 6...transmission, 9...radiator.

Claims (1)

[Scope of utility model registration request] A dynamic crab unit consisting of an engine, a clutch, and a transmission is mounted on the front of the vehicle body, and the crankshaft of the engine of this unit is arranged parallel to the direction of travel of the vehicle body, and a radiator for cooling the engine is provided in front of the dynamic crab unit. A clutch arrangement structure for a motorcycle in which the clutch in the dynamic clutch is located in front of the engine and below the radiator to form a ventilation space in front of the clutch.