JPS6014996Y2 - Friction clutch cooling system - Google Patents

Description

[Detailed Description of the Invention] This invention particularly relates to a cooling device within a clutch housing of a friction clutch for an automobile.

In other words, this invention uses a single boot provided in the clutch housing to exhaust air from inside the housing and take in outside air, thereby ensuring air circulation, thereby keeping the ambient temperature inside the housing low. The object of the present invention is to provide a cooling device that can maintain good friction characteristics and durability of a clutch disk.

Next, the configuration of this invention will be explained in detail according to an embodiment shown in the drawings.

First, in FIG. 1, which shows a cross section of a friction clutch for an automobile, reference numeral 1 indicates an engine cylinder block, 2 indicates a clutch housing, and 3 indicates a transmission case.

As is well known, the clutch housing 2 includes a flywheel 5 fixed to the crankshaft 4, a clutch cover 6 attached to the flywheel 5, and a pressure plate 7 incorporated inside the cover 5. A clutch disc 9, etc., which is spline-slidingly fitted onto the input shaft 8 of the transmission, and the like are respectively disposed.

Now, inside the clutch housing 2, frictional heat is generated between the flywheel 5, clutch disk 9, and pressure plate 7.

Furthermore, due to recent exhaust gas countermeasures, the ambient temperature outside the housing 2 has increased, and as a result, the temperature inside the housing 2 has also tended to increase.

Therefore, a common practice is to separately provide an intake hole and an exhaust hole in the clutch housing 2 to ventilate the inside of the clutch housing 2 in order to cool the inside of the housing.

In this embodiment, as is clear from FIG. 2, an opening 10 that communicates with the inside and outside of the clutch housing 2 is formed in a part of the clutch housing 2.

The opening 10 is formed at a location where the flow of air stirred within the housing 2 by the rotation of the flywheel 5, clutch cover 6, pressure plate 7, and clutch disc 9 is fastest.

An intake/exhaust duct boot 11 integrally formed of a material such as rubber is attached to this opening 10.

That is, as shown enlarged in FIGS. 3 to 5, the boot 11 described above includes a main body 1 mA discharging body 11B located outside the housing 2, and a cylindrical body 11B located outside the housing 2. Further, on the outer circumferential surface of the main body 11A, there is a mounting flange 14 for clamping the periphery of the opening 10 from the inside and outside of the housing 2 and fixing the boot 11 to the housing 2.
are integrally formed.

The above-mentioned main body 11A is connected to the above-mentioned flywheel 5.
For the swirling flow of air that accompanies the rotation of components such as the clutch cover and the like, it acts as a dam at the point where the flow velocity is highest.

Therefore, the side opposite to the swirling air flow of 1 mA of the main body (the left side in FIG. 4) has a positive pressure, and the opposite side (the right side of FIG. 4) has a negative pressure, creating a pressure difference in the air with the 1 mA main body as a boundary.

Now, as is particularly clear from FIGS. 4 and 5, the inside of the boot 11 is divided into an intake passage 11 and an exhaust passage 13 along the circumferential direction of the housing 2 by a central partition wall.

The intake passage 12 and the exhaust passage 13 are communicated within the housing 2 through internal openings 12a and 13a formed on both sides of the main body 1mA located inside the housing 2, and through the opening at the tip of the cylindrical body 11B. It opens to the outside.

Note that the internal opening 12a of the intake passage 12 is opened to the negative pressure side of the air swirl flow described above, and the internal opening 13a of the exhaust passage 13 is opened to the positive pressure side. ing.

With the above configuration, air swirls inside the housing 2 as the flywheel 5, clutch cover 6, pressure plate 7, clutch disc 9, etc. rotate.

As a result, the air in the housing 2 is discharged to the outside through the exhaust passage 13 having an internal opening 13a on the positive pressure side of the swirling flow, and the air in the intake passage 12 having an internal opening 12a on the negative pressure side.
External air is introduced into the housing 2 through the housing 2 .

This air circulation effectively cools the inside of the housing 2.

As is clear from FIG. 3, the intake passage 12 and the exhaust passage 13 have a direction change of approximately 90 degrees at the point where the main body 11A faces the cylindrical body 11B.
Mud water or the like is prevented from entering the housing 2 through the inside.

As described above, this invention not only provides a single intake/exhaust boot in the clutch housing, but also utilizes the swirling flow of air generated by the rotation of the flywheel, clutch cover components, etc. within the housing. Since air is taken in and exhausted, it is only necessary to form a single opening in the clutch housing that also serves as air intake and exhaust. Holds well.

[Brief explanation of drawings]

The drawings show an embodiment of this invention; Fig. 1 is a sectional view showing a friction clutch for an automobile, and Fig. 2 is a cross-sectional view showing a friction clutch for an automobile, and Fig. 2 is a cross-sectional view showing the component parts in the clutch housing, and is shown by the ■-■ line arrow in Fig. 1. 3 is an enlarged cross-sectional view of the main part of FIG. 1, and FIG.
5 is a sectional view taken along line V-IV in FIG. 3. FIG. 2...Clutch housing, 5...Flywheel, 6...Clutch cover 9...
...Clutch disc, 10...Opening,
11... Boots, 12... Intake path, 1
2a... Internal opening, 13... Exhaust path,
13a... Internal opening.

Claims (1)

[Scope of utility model registration request] A boot provided with an intake passage and an exhaust passage leading to the inside and outside of the housing is installed in an opening in a part of the outer periphery of the clutch housing to absorb the swirling flow of air caused by the rotation of the flywheel and clutch cover components inside the housing. 1. A cooling device for a friction clutch, characterized in that the internal opening of an exhaust passage is located on the side opposite to the internal opening of the exhaust passage, and the internal opening of the intake passage is located on the opposite side.