JPH03189419A - Forced air cooling device for dry clutch - Google Patents

Abstract

PURPOSE:To enable the air cooling of a dry clutch regardless of a vehicle speed by securing a fan to the end of a crankshaft for integration, rotating the fan together with the crankshaft, concealing the area of the fan and the dry clutch with a clutch cover and providing the clutch cover with intake and exhaust ports. CONSTITUTION:A fan 11 is secured to the front end of a crankshaft 1, and the area of the fan 11 and a dry clutch 5 is concealed with a clutch cover 12. This cover 12 is provided with an intake port 13 at a position opposite to the fan 11 and an exhaust port 14 at a position corresponding to the external surface of the clutch 5 furthest from the fan 11. When an engine is running, the fan 11 rotates together with the crankshaft 1. Consequently, the air is introduced through the intake port 13 for cooling the dry clutch 5 and discharged through the exhaust port 14. According to the aforesaid construction, the dry clutch 5 can be forcibly air cooled even at the time of an engine start. Also, as the clutch cover 12 is fitted, no foreign material is entrapped and a noise is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a forced air cooling device for a dry clutch used in an engine mounted on a motorcycle or the like.

[Conventional technology]

The engine installed in a motorcycle for power is equipped with a clutch and a multi-gear transmission.The clutch is engaged and disconnected, and the gears of the multi-gear transmission are changed according to the vehicle speed to drive the motorcycle. . In high-power engines,
A multi-disc dry clutch with a large clutch capacity is used. The dry clutch is cooled by cutting out the outside of the clutch cover that covers the dry clutch to expose the outside of the dry clutch so that it can be exposed to wind from driving.

[Problem to be solved by the invention]

Since the outside of the dry clutch is exposed, the noise generated in the clutch is directly radiated to the outside, resulting in a high level of noise. Also, as with road races, if the rider wears long boots and is properly dressed, there is no problem, but there is the inconvenience of getting the hem of the pants caught in the rotating dry clutch. Furthermore, at low speeds, which are often used, there is insufficient air flow, which can cause problems such as clutch facings burning.

In view of this, this invention covers a dry clutch with a clutch cover, sends cooling air with a blower fan,
It is an object of the present invention to provide a forced air cooling device for a dry type clutch that can eliminate the above-mentioned disadvantages by forced air cooling.

[Means to solve the problem]

In order to achieve the above object, the forced air cooling device for a dry clutch of the present invention meshes a primary pinion connected to a crankshaft with a primary gear mounted on a countershaft, and provides a connection between the primary gear and the countershaft. Connect the dry clutch, fasten the blower fan to the end of the crankshaft, cover the blower fan and the dry clutch part with a clutch cover, provide an inlet in the part of the clutch cover facing the blower fan, and connect the clutch cover to the outside of the dry clutch. The reason is that an air exhaust port is provided on the side and a blower fan is used to forcefully cool the dry clutch.

[Effect]

The blower fan rotates as the engine crankshaft rotates, and cools the dry clutch by sending cooling air to it. Air can be blown even when the vehicle speed is slow, and cooling air can be blown even when the clutch is partially engaged when starting, thereby preventing the clutch facing from burning. Further, since the dry clutch is covered with the clutch cover, foreign matter is not caught in the rotating part of the dry clutch, and the noise generated can be reduced.

〔Example〕

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

A primary gear 4 mounted on a counter shaft 3 is meshed with a primary pinion 2 connected to a crankshaft 1 of an engine. The dry clutch 5 is constructed by disposing a plurality of clutch facings 8 between a housing 6 attached to the primary gear 4 and a sleeve hub 7 attached to the counter shaft 3, and pressing these with a pressure plate 9. The clutch can be disengaged by separating the pressure plate 9 with a rod 10.

A blower fan 11 is fastened to the tip of the crankshaft 1.

The blower fan 11 and dry clutch 5 are covered with a clutch cover 12. Clutch cut-12 is assembled by splitting the top into two parts. The clutch cover 12 is provided with an inlet 13 at a position facing the blower fan 11, and an exhaust port 14 is provided on the outer surface of the dry clutch 5 farthest from the blower fan 11. While the engine is running, the blower fan 11 rotates as the crankshaft 1 rotates, and the air taken in through the intake port 13 is turned into cooling air and blown onto the dry clutch 5 to cool it. The cooling air after cooling is discharged to the exhaust port 14.

〔Effect of the invention〕

As explained above, since this invention is configured as described above, the blower fan rotates with the rotation of the crankshaft while the engine is rotating, and it can send cooling air to the dry clutch regardless of the vehicle speed, thereby achieving forced air cooling. . In particular, even in cases where the clutch is left partially engaged at the time of starting, forced cooling is performed to prevent the clutch facing from burning. In addition, since the dry clutch is covered with a club cover, no foreign matter is caught in the clutch, and less noise is emitted, making it quieter. Since the temperature of the clutch facing portion is stabilized, the feeling of the clutch can be kept constant.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a vertical sectional plan view, and Fig. 2 is an external side view. 1... Crankshaft, 2... Primary pinion,
3...Counter shaft, 4...Primary gear
5...Dry clutch, 11...Blower fan, 12.
...Clutch cover 13...Intake port, 14...Exhaust port.

Claims (1)

[Claims] A primary pinion connected to the crankshaft is engaged with a primary gear mounted on a countershaft, a dry clutch is connected between the primary gear and the countershaft, a blower fan is fastened to the end of the crankshaft, and the blower fan and dry clutch are connected between the primary gear and the countershaft. The clutch is covered with a clutch cover, and an intake port is provided on the part of the clutch cover opposite to the blower fan, and an air exhaust port is provided on the outer surface of the dry clutch of the clutch cover, so that the dry clutch is forcedly cooled by the blower fan. Forced air cooling device for dry clutch.