JPH0349305Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a clutch device, and in particular, a clutch device that can prevent abnormal noises generated from the clutch (hereinafter referred to as clutch squeal) when the clutch is engaged. Regarding.

[Prior Art] Generally, as shown in FIG. 6, a clutch device provided between an engine and a transmission has a clutch disk 3 in a clutch cover 2 fixed to a flywheel 1 with a crankshaft of the engine. , a pressure plate 4 disposed adjacent to the clutch disk 3, and a pressure spring 5 capable of pressing the pressure plate 4 against the clutch disk 3.

Then, the clutch disk 3 is held between the pressure plate 4 and the flywheel 1 by frictional engagement, and the clutch is connected.

The pressure spring 5 is interposed between the pressure plate 4 and the clutch cover 2, with both ends thereof held by spring seats 6. Further, the spring seat 6 on the clutch cover 2 side is attached to the clutch cover 2 by a support cap 7, while the pressure plate 4
The side spring seat 6 is the pressure plate 4
It is attached by fitting into a protrusion 4a formed in the. Furthermore, a recess 4b as shown in FIG. 7 is formed at the abutting portion between the pressure plate 4 and the spring seat 6.

[Problem that the invention attempts to solve] However, with such a clutch device,
When the clutch is engaged when the vehicle starts, the clutch disk 3 tries to come to a standstill until the clutch device is fully engaged from the half-clutch state.
Since a slip occurs between the flywheel 1 and the pressure plate 4 which are rotated by the engine, vibrations occur in the pressure plate 4 in its axial and circumferential directions.

This vibration causes pressure spring 5
When the noise is amplified and transmitted to the clutch cover 2, it resonates with the clutch cover 2, the clutch housing (not shown), etc., and a clutch squeal (cooing sound) is generated. This clutch squeal is caused by vibrations of the pressure plate, particularly along the circumferential direction, generated in the clutch engagement process and transmitted to the clutch cover, clutch housing, etc. via the pressure spring. I know what to do.

The present invention aims to solve these problems and provides a clutch device that absorbs vibrations in the axial and circumferential directions of the pressure plate and prevents clutch squeal. The purpose is to

[Means for solving problems]

Therefore, the clutch device of the present invention includes a pressure plate disposed in the space formed by the flywheel and the clutch cover, and a clutch interposed between the pressure plate and the flywheel. a disk; and a pressure spring disposed between the clutch cover and the pressure plate to press the pressure plate in the direction of the flywheel; A concave portion is formed in the portion facing the shear spring, and a washer is formed with a convex portion that fits into the concave portion. The present invention is characterized in that a vibration isolating sheet made of an elastic member having hysteresis characteristics with respect to deformation in the shear direction is disposed in the recess.

[Effect]

In the above-mentioned clutch device of the present invention, a concave portion is formed in the portion of the pressure plate facing the pressure spring, and a washer having a convex portion that fits into the concave portion is bonded to the washer and the above-mentioned presser plate is connected to the washer. Since a vibration isolating sheet consisting of an elastic member that supports the pressure plate side end of the shear spring is disposed in the recess, even if the pressure plate vibrates during the clutch connection process, the washer prevents the elastic member from being pressed. An action is performed to reliably prevent displacement with respect to the shear plate, and a member (such as rubber or resin) having hysteresis characteristics with respect to deformation in the shearing direction is used as the elastic member. By deforming this elastic member in the shearing direction, it acts to effectively reduce the transmission of circumferential vibration of the pressure plate to the pressure spring, thereby reducing clutch squeal. is prevented. In addition, the friction surface of the pressure plate normally reaches a high temperature of 200℃ or more, but the washer prevents this heat from being directly transmitted to heat-sensitive elastic members such as rubber and resin. Deterioration of components can also be prevented.

〔Example〕

Hereinafter, a clutch device as an embodiment of the present invention will be explained with reference to the drawings. Fig. 1 is a longitudinal sectional view showing the main parts, Fig. 2 a is a bottom view of the washer, and Fig. 2 b is a diagram of the washer. A side view, FIG. 3a is a plan view of the elastic member, FIG. 3b is a side view of the elastic member, FIG. 4 is a bottom view showing a modification of the washer, and FIGS. 5a and b show its elasticity. A modification of the member is shown in which FIG. 5a is a plan view thereof and FIG. 5b is a side view thereof.

The clutch device of the present invention has a clutch disk 3 (see FIG. 6), a pressure plate 4,
As shown in FIG. sheet 8
is interposed.

This anti-vibration sheet 8 is made up of a washer 9 and an elastic member 10, and on the bottom of the washer 9 are
As shown in FIG. 7, a convex portion 9a that can be engaged with a concave portion 4b (see FIG. 7) formed in the pressure plate 4 is provided.
are formed on the upper surface of this washer 9 as shown in FIGS.
An elastic member 10 made of an elastic material such as rubber as shown in FIG. 1 is bonded by baking.

Note that holes 9c and 10a, which fit into the protrusion 4a of the pressure plate 4, are formed in the center of the washer 9 and the elastic member 10, respectively.

Such a vibration isolating sheet 8 is provided for each of the plurality of pressure springs 5 provided in the clutch device.

Furthermore, an elastic member 11 may be additionally interposed between the spring seat 6 attached to the clutch cover 2 by the support cap 7 and the pressure spring 5.

In addition, as a modification of the vibration isolating sheet, the protruding portion 4a of the pressure plate 4 is formed with a width across flats, and the fourth
As shown in FIG. 5A and FIG. Good too.

Since the clutch device of the present invention is constructed as described above, when the clutch is connected when the vehicle starts, the clutch disk 3 and the flywheel 1
(See Fig. 6) Even if axial vibration of the pressure plate 4 occurs due to slippage between the clutch cover 2 and the pressure plate 4, this vibration is transmitted to the clutch cover 2 via the pressure spring 5. Before being transmitted, the vibration is reliably absorbed by the elastic member 10 of the vibration isolating sheet 8.

Further, since the convex portion 9a formed on the washer 9 of the vibration isolating sheet 8 engages with the recess 4b of the pressure plate 4, the vibration isolating sheet 8 is fixed and the elastic member 10
can be reliably prevented from being displaced with respect to the pressure plate 4.

Further, the elastic member 10 is made of a rubber material that has a hysteresis characteristic regarding its own deformation in the shearing direction, and when the elastic member 10 deforms in the shearing direction, the pressure plate 4 is deformed in the circumferential direction. Transmission of vibration to the pressure spring 5 is effectively reduced to prevent clutch squeal.

Furthermore, although the friction surface of the pressure plate 4 normally reaches a high temperature of 200° C. or higher, the washer 9 prevents this heat from being directly transmitted to the elastic member 10, which is weak against heat, such as rubber.

[Effect of idea]

As detailed above, according to the clutch device of the present invention, a concave portion is formed in the portion of the pressure plate opposing the pressure spring, and a washer is provided with a convex portion that fits into the concave portion. A vibration isolating sheet consisting of an elastic member that is joined to the elastic member and supports the pressure plate side end of the pressure spring is disposed in the recess, so that the pressure plate does not vibrate during the clutch connection process. Also, the washer can reliably prevent the elastic member from being displaced with respect to the pressure plate. Furthermore, a member (such as rubber or resin) having a hysteresis characteristic with respect to its own deformation in the shearing direction is used as the elastic member, and by deforming the elastic member in the shearing direction, the circumference of the pressure plate is This has the effect of effectively reducing the transmission of directional vibrations to the pressure spring, thereby preventing clutch squeal.

Also, the friction surface of the pressure plate is usually 200
The washer can prevent this heat from being directly transmitted to the heat-sensitive elastic member such as rubber or resin, which is at a high temperature of 0.degree.

[Brief explanation of drawings]

Figures 1 to 5 show a clutch device as an embodiment of the present invention, in which Figure 1 is a vertical sectional view showing the main parts thereof, Figure 2a is a bottom view of the washer, and Figure 2b is
is a side view of the washer, FIG. 3a is a plan view of the elastic member, FIG. 3b is a side view of the elastic member, FIG. 4 is a bottom view showing a modified example of the washer, and FIGS. b shows a modification of the elastic member, and the fifth
Figure a is a plan view thereof, Figure 5 b is a side view thereof, Figures 6 and 7 show a conventional clutch device, Figure 6 is a longitudinal sectional view thereof, and Figure 7 is the same as that shown in Figure 6. - It is an arrow sectional view. DESCRIPTION OF SYMBOLS 1... Flywheel, 2... Clutch cover, 3... Clutch disk, 4... Pressure plate, 4a... Projection, 4b... Recess, 5...
...Pressure spring, 6... Spring seat, 7... Support cap, 8... Anti-vibration sheet, 9, 9'... Washer, 9a... Protrusion, 9c,
9'c...hole, 10, 10'...elastic member, 10
a, 10'a...hole, 11...elastic member.

Claims (1)

[Scope of utility model registration request] A pressure plate disposed in a space formed by the flywheel and the clutch cover, a clutch disk interposed between the pressure plate and the flywheel, and the clutch cover and the clutch cover. a pressure spring disposed between the shear plate and the pressure spring that presses the pressure plate in the direction of the flywheel, and a recessed portion is formed in a portion of the pressure plate facing the pressure spring; , a washer formed with a convex portion that fits into the concave portion, and a washer that is joined to the washer to support the end portion of the pressure spring on the pressure plate side, and has a hysteresis characteristic regarding deformation in the shearing direction. A clutch device characterized in that a vibration isolating sheet made of an elastic member is disposed in the recess.