JPH0445949Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a ventilation system for a clutch housing in an automobile.

(Prior art) In dry single-plate friction clutches for automobiles,
Since frictional heat is generated during the connection process, resulting in high temperatures, the clutch housing is configured to have ventilation holes to cool it down.

For example, in Japanese Utility Model Application No. 62-92329, an exhaust port is provided in the clutch housing and a bellows type air pump is installed, and the bellows type air pump is operated in conjunction with the operation of the clutch release lever to draw outside air into the clutch housing. It is disclosed that the system is adapted to be introduced into the system.

(Problem that the invention aims to solve) However, if the ventilation holes or ventilation holes are always open in the clutch housing as described above, mud may enter through these ventilation holes when driving on rough roads, causing rust and damage to the clutch housing. There is a problem in that it may cause poor cutting, and countermeasures are necessary, especially for vehicle models that drive on rough roads.

In addition, with an air pump, the exhaust port can be made smaller to make it somewhat difficult for dirt to enter, but the additional pump operation increases the pressure on the clutch pedal, which worsens operability. On the other hand, there is a problem that if the clutch pedal is pressed too loosely, ventilation will be insufficient, and since air is only blown once by one depression of the clutch pedal, it is difficult to obtain sufficient ventilation to release heat. There is.

SUMMARY OF THE INVENTION In view of the above-mentioned problems of the prior art, it is an object of the present invention to provide a ventilation system for a clutch housing that prevents dirt from entering the clutch housing and provides a sufficient cooling effect.

(Means for Solving the Problems) The clutch housing ventilation device of the present invention has a ventilation opening communicating with the inside of the clutch housing, and a shielding member that opens and closes this ventilation opening. It is characterized in that the operating means of the shielding member is connected to the clutch release lever so as to open the ventilation port in conjunction with the release operation.

(Function) According to the above structure of the present invention, when the clutch release lever is operated, the ventilation port is opened and high temperature air is released, thereby obtaining a sufficient cooling effect, and then when the clutch is connected. Even if frictional heat is generated, the inside of the clutch housing will not become overheated, and the ventilation port is always closed with a shielding member, so mud etc. will not get into the clutch housing even when driving on rough roads. This can be prevented, and there is no risk of rust occurring and causing clutch disengagement.

(Example) An example of the present invention will be described below with reference to FIGS. 1 and 2.

In FIG. 1, 1 is a clutch and transmission assembly, 2 is a clutch, and 3 is a transmission. As shown in FIG. 2, the clutch 2 is connected to a crankshaft 4 of an engine (not shown).
It consists of a flywheel 5 connected to the transmission, a clutch disk 6 spline connected to the input shaft 7 to the transmission, a pressure plate 8, a clutch spring 9, a release bearing 10, etc., and is built in the clutch housing 11. ing.

A release lever yoke 12 is fixed to one end of a release lever shaft 13 rotatably supported by the clutch housing 11, and is engaged with the release bearing 10 and moved. A clutch release lever 14 that penetrates the clutch housing 11 and projects to the outside is fixed to the other end of the release lever shaft 13, and its tip is connected to a clutch pedal 16 in the vehicle interior by a clutch cable 15. . Reference numeral 17 denotes a bellows that closes the penetrating portion of the clutch release lever 14 to the outside.

The clutch housing 11 has a ventilation hole 1 located on the side of the penetration part of the clutch release lever 14 for discharging high temperature air inside and introducing outside air.
8 is formed, and is releasably closed by an elastic shielding plate 19 such as a rubber plate. Further, an L-shaped operating member 20 is fixed to the clutch release lever 14 so that its tip abuts or comes close to the elastic shielding plate 19, and when the clutch release lever 14 is swung, this operating member 20 becomes elastic. Shielding plate 19
The ventilation port 18 is opened by pressing the button.

With the above configuration, when the clutch pedal 16 is depressed, the clutch release lever 14 swings as shown by the imaginary line in FIG. 2 via the clutch cable 15, and the release bearing 10 is pushed by the release lever yoke 12. The clutch spring 9 is pressed, the pressure plate 8 is separated from the clutch disk 7, the clutch disk 7 becomes free, and the power transmission from the crankshaft 4 to the input shaft 6 is cut off.

At the same time, the clutch release lever 1
4 moves the operating member 20, pushes the elastic shielding plate 19 inside the clutch housing 11, opens the ventilation port 18, and the high temperature air inside the clutch housing 11 is discharged from the ventilation port 18. Outside air is introduced and the clutch housing 1
1 is cooled down. While the clutch pedal 16 is depressed, the ventilation port 18 remains open, allowing sufficient ventilation to provide the necessary cooling effect.

Thereafter, when the clutch pedal 16 is gradually released, the clutch disk 7 is pressed against the flywheel 5 via the pressure plate 8 by the clutch spring 9, and is gradually rotationally coupled to the flywheel 5 while being rotated by friction. During this time, frictional heat is generated and the ambient temperature inside the clutch housing 11 rises, but the ambient temperature is cooled by the outside air immediately before that, so it does not become overheated. In this way, since the inside of the clutch housing 11 is cooled immediately before frictional heat is generated, overheating can be effectively prevented even if the ventilation port 18 is always closed with the elastic shielding member 19. can. In addition, since the ventilation port 18 is always closed, there is no risk of mud or the like entering the clutch housing 11 through the ventilation port 18 even when driving on rough roads, and there is no risk of rust forming and causing clutch disengagement. Nor.

In the above embodiment, the elastic shielding plate 19 is used as a means for closing the ventilation port 18, but any type of shielding member that can be opened and closed may be used. What is necessary is to adopt an operating means for opening and closing.

Further, in the above embodiment, an example was shown in which a single ventilation port 18 was provided, but as shown by the imaginary line in FIG.
Another ventilation port 21 may be formed, and a similar opening/closing operation means 22 may be provided which is interlocked with the clutch release lever 14, so that hot air is discharged from one ventilation port and released from the other ventilation port. By introducing outside air, it is possible to achieve a higher cooling effect.

(Effect of the invention) According to the clutch housing ventilation system of the present invention, when the clutch release lever is operated, the ventilation port is opened and high temperature air is released, thereby obtaining a sufficient cooling effect, and then the clutch housing is Even if frictional heat is generated when the clutch is connected, the inside of the clutch housing will not become overheated. Moreover, since the ventilation opening is always closed with a shielding member, it is possible to prevent mud, etc. from entering the clutch housing even when driving on rough roads, and there is no risk of rust forming and causing clutch disengagement. do.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention,
FIG. 1 is an external perspective view of an assembly of a clutch and transmission, and FIG. 2 is a vertical sectional view showing the schematic structure of the clutch. DESCRIPTION OF SYMBOLS 11... Clutch housing, 14... Clutch release lever, 18... Ventilation opening, 19... Elastic shielding plate, 20... Operating member.

Claims (1)

[Scope of utility model registration request] A ventilation opening communicating with the inside of the clutch housing is formed, and a shielding member is provided to open and close the ventilation opening, and a shielding member is provided on the clutch release lever so that the ventilation opening is opened in conjunction with the clutch release operation. A ventilation device for a clutch housing, characterized in that operating means for the members are connected.