JPH022976Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates primarily to a clutch cooling mechanism employed in automobiles.

(Prior art) In general, in a twin clutch that has two clutch disks, it is difficult for air to flow between the two clutch disks, and there is a risk that the intermediate plate may overheat due to excessive use of the clutch. . Furthermore, when the intermediate plate becomes hot, it accelerates the wear of the opposing friction facings, so there is a fear that the service life of the clutch will be significantly reduced.

Even in a single-disc clutch with a single clutch disc, if the flywheel, which occupies the innermost part, becomes hot, wear on the friction facings increases. As a countermeasure to this problem, the applicant has already proposed a diaphragm spring in which many radial tongues are provided with vanes for introducing cold air (Utility Model Application No. 60-145625). However, in that case, although the friction portion between the pressure plate and the friction facing on the side where the diaphragm spring is located is relatively well cooled, the cooling air does not reach the opposite side (inner side) sufficiently. The reason for this is that the clutch disc is disc-shaped and does not have good ventilation in the width direction.

(Purpose of the invention) The purpose of the invention is to actively improve the ventilation in the axial direction of the clutch disc so that cooling air can be forced into the rear part of the clutch disc. Particularly in twin clutches, the purpose is to actively draw air between the two clutch disks to cool the intermediate plates, suppress wear on the friction facings, and extend the life of the clutch.

(Structure of the invention) The spline hub of the present invention has a flange on the outer periphery, a two-piece side plate disposed on both sides of the flange, a torsion spring fitted into a window hole at a position opposite to the flange and the side plate, and a torsion spring on one side. A clutch is equipped with a friction facing attached to the outer periphery of a side plate via a compression plate, and the friction facing is pressed or released between a pressure plate that rotates integrally with the flywheel and the flywheel. This clutch cooling mechanism is characterized in that a blade is provided on the opposite rotation direction side of the window hole of the side plate to take in air to the window hole side of the other side plate.

(Example) Fig. 1 shows the case where the present invention is applied to a twin clutch, where 1 and 2 are first and second clutch disks, 3 is a pressure plate, and 4 is an intermediate plate (intermediate plate). ), 5 is a flywheel. Part 1 and 2 clutch discs 1 and 2
have almost the same structure, but the only difference is that the blade 8 according to the present invention is provided in the window hole 7 of the retaining plate 6 of the first clutch disk 1. 2, corresponding parts of the second clutch disk 2 are given the same reference numerals. An output shaft of a transmission (not shown) is fitted into a spline 10 on the inner circumference of the spline hub 9 at the center of the first clutch disk 1. The flange portion 11 on the outer periphery of the spline hub 9 has a friction washer 1 on the right side of the inner periphery.
2. A retaining plate 6 is provided via a friction plate 13 and a disc spring 14, and a clutch plate 16 is provided via a friction washer 15 on the left side. The retaining plate 6 and the clutch plate 16 (side plate) are integrated at their outer peripheral portions by a rivet 17, and friction washers 12 and 15 on both sides are pressed against the flange portion 11 to form a hysteresis torque generating portion. The window hole 17 of the flange portion 11, the window hole 18 of the clutch plate 16, and the retaining plate 6
A torsion spring 19 is disposed in the window hole 7 portion in a posture extending in the circumferential direction, so that both plates 6, 16 and the flange portion 11 can be relatively twisted via the torsion spring 19. ing. The clutch plate 16 is connected to a friction facing 21 via a coupling plate 20.

Flywheel ring 2 is attached to flywheel 5.
A clutch cover 24 is attached via 3.
There are two wiring rings 25 on the clutch cover 24.
A diaphragm spring 26 is supported through the diaphragm spring 26, and the outer peripheral portion of the diaphragm spring 26 is normally pressed against a projection 27 of the pressure plate 3. A number of radial tongues 28 of the diaphragm spring 26 face a release bearing 29. 30 is a number of stud pins.

The intermediate plate 4 is connected to the flywheel ring 23 via a strap 32 extending in the circumferential direction of the clutch; the pressure plate 3 is also connected to the clutch cover 24 via a similar strap 33; Therefore, the intermediate plate 4 and the pressure plate 3 are both rotatable integrally with the flywheel 5 and movable in the axial direction.

The window hole 7 of the retaining plate 6 has an inner edge 35 and an outer edge 36 for preventing the torsion spring from protruding, which conform to the shape of the torsion spring 19, and the blade 8 has an arcuate cross section that smoothly continues with the inner and outer edges 35 and 36. It is a part of the body of a drum with feathers 8 like a part of the body of a drum.
In the center of the arc, the amount of overhang is greatest near the midpoint of the length of the torsion spring 19, and the amount of overhang decreases toward the end of the torsion spring. That is, when the rotation direction of the clutch disk is in the direction of arrow R in FIGS. 2 to 4, the blade 8 is
It covers the half of the window hole 7 on the opposite side to the rotational direction and is inclined away from the torsion spring 19 as it goes in the rotational direction from the opposite-rotation side end 7a of the window hole 7 that supports the torsion spring 19. are doing. In this way, the central part of the arc of the blade 8 is inclined in a direction away from the cylindrical side surface of the torsion spring 19 as it moves toward the direction of rotation arrow R, so that when the blade 8 moves in the direction of arrow R, It plays the role of a blade that takes in air from the portion facing the window hole 7 as shown by arrow A (FIGS. 1 and 4). The window hole end 7a is generally closed by the end of the torsion spring 19. However, it is also possible to provide the blade 8 with an integral end wall 8a (FIG. 4) in order to close the window hole end 7a with a portion of the blade 8. In that case, all the air sucked by the blade 8 will be transferred to the window holes 7, 17, 1.
It will be pushed to the 8th side.

A large number of radially extending air circulation holes 38 are formed in the intermediate plate 4, and radial air circulation holes 39 are also formed in a portion of the flywheel ring 23 that faces the circulation holes 38.

Next, the effect will be explained. Release bearing 29
When the pressure plate 3 presses and releases the friction facings 21, 21 against the intermediate plate 4 and the flywheel 5 by repeating the operation,
The intermediate plate 4 becomes hot due to the friction. On the other hand, when the first clutch disk 1 is driven by the pressure plate 3 and the intermediate plate 4, the air inside the clutch cover 24 is forced to flow through the clutch disk 1 in the axial direction as shown by arrow A by the vanes 8. A part of the air circulation hole 3 is connected to the space between both disks 1 and 2.
8 and 39, and some of the remaining part goes to the second
Clutch disc 2 torsion spring 19
It passes through the section and is supplied to the pressure contact portion between the flywheel 5 and the friction facing 21 as shown by arrow B. As a result, not only the intermediate plate 4 but also
The friction surface of the flywheel 5 is also actively cooled.

(Effects of the invention) As explained above, according to the invention, the blades 8 are provided in the window holes 7 of the retaining plate 6 of the clutch disk to actively draw air into the window holes 7. Particularly in the case of a twin clutch, the intermediate plate 4 is forcibly cooled, and the wear of the opposing friction facings 21 is significantly reduced. In the case of a single-plate clutch, the same effect can be expected since cooling air can be forcibly supplied to the flywheel friction surface that occupies the inner part of the clutch.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view, Fig. 2 is a partial front view of the first clutch disk in Fig. 1, viewed in the direction of the arrow;
Figure 3 is a perspective view of the window hole with blades, and Figure 4 is a perspective view of the window hole with blades.
FIG. 3... Pressure plate, 5... Flywheel, 6, 16... Side plate, 7, 17, 18... Window hole, 8... Vane, 9... Spline hub, 11... Flange portion, 19 ...Torsion spring, 20...Cushioning plate, 21...Friction facing.

Claims (1)

[Claims for Utility Model Registration] (1) A flange on the outer periphery of the spline hub, two integrated side plates arranged on both sides of the flange,
Equipped with a torsion spring fitted into a window hole located opposite the flange and side plate, and a friction facing attached to the outer periphery of one side plate via a cushioning plate, and the friction facing rotates together with the flywheel. In a clutch that is pressed or released between a pressure plate and a flywheel, a vane is provided on the counter-rotation direction side of a window hole in a side plate on the pressure plate side to take air into the window hole in the other side plate. The clutch cooling mechanism is characterized by: (2) The clutch cooling mechanism according to claim 1, wherein the blade also serves as a presser edge of a torsion spring. (3) The clutch cooling mechanism according to claim 1, wherein the blades are inclined away from the torsion spring as they move toward the rotation direction.