JP2550962Y2 - Clutch cover assembly - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch cover assembly, and more particularly, to a clutch cover assembly in which a clutch cover supports an outer peripheral end of a diaphragm spring.

[0002]

2. Description of the Related Art A clutch cover assembly used for a clutch or the like of an automobile is for holding a clutch disk between a flywheel and a clutch cover and mainly includes a pressure plate, a diaphragm spring, and a clutch cover. doing. In such a clutch cover assembly, in the case of the pull type, the outer peripheral end of the diaphragm spring is supported by the support portion of the clutch cover.

However, since the diaphragm spring support portion of the clutch cover is formed over the entire circumference, if dust such as sand or dust enters the clutch cover,
Dust collects between the diaphragm spring and the diaphragm spring support of the clutch cover due to centrifugal force. Then, at the time of clutch release, the diaphragm spring crushes the accumulated debris, which adversely affects the release load characteristics. In addition, when the dirt accumulates, the setting posture of the diaphragm spring changes, which has an adverse effect on the pressing load against the pressure plate.

Therefore, as shown in FIG. 5, a clutch cover assembly having a clutch cover provided with a dust escape portion has been conventionally used. In FIG. 5, the clutch cover assembly has a dish-shaped clutch cover 1 and a pressure plate 2 and a diaphragm spring 3 therein. The clutch cover 1 has a pivot portion 4 which abuts against and supports the outer peripheral end of the diaphragm spring 3 and a non-contact portion 5 which is formed so as to form a gap with the outer peripheral end of the diaphragm spring 3 alternately. It is formed continuously.

In the clutch cover assembly having such a configuration, when the clutch rotates, dust such as sand and dust moves to the outer periphery due to centrifugal force, and causes a gap between the diaphragm spring 3 and the non-contact portion 5 of the clutch cover 1. , And is discharged to the outside through a route shown by an arrow.

[0006]

[Problems to be solved by the invention]
In the clutch cover assembly in which the non-contact portion 5 is formed on the clutch cover 1, dust is actually disturbed by the clutch cover 1 and is not sufficiently discharged to the outside. In particular, when traveling in a bad environment with a lot of dust, such as a sandy place or a desert, a large amount of dust enters and cannot be discharged. As described above, the release load characteristics and the like are adversely affected.

An object of the present invention is to provide a clutch cover assembly that can sufficiently discharge dust such as sand and dust entering the inside.

[0008]

A clutch cover assembly according to the present invention includes a pressure plate, a diaphragm spring, and a clutch cover. The pressure plate is an annular member for holding the clutch disc together with the flywheel. The diaphragm spring is a disk-shaped member that elastically presses the pressure plate toward the flywheel. The outer circumference of the clutch cover is connected to the flywheel and covers the outer circumference of the pressure plate and the diaphragm spring.
Part and the flywheel extending radially inward from the outer peripheral part.
And an annular portion opposed to the ring . Clutch cover ring
The part has a plurality of pivots that are circumferentially spaced and support the outer peripheral edge of the diaphragm spring
Have been. Clutch covers are pivoted in the circumferential direction.
Between the diaphragm part and the annular part in the axial direction.
And a plurality of discharge portions formed to open radially outward.

[0009]

In the clutch cover assembly according to the present invention, when the flywheel rotates, the clutch cover fixed to the flywheel also rotates. At this time, the dust that has entered the interior moves in the outer peripheral direction due to the centrifugal force. Garbage is
Move to the outer peripheral side through the gap between the annular portion of the switch cover and the diaphragm spun ring, and pass between the pivot portions.
Finally, it is discharged from the clutch cover discharge portion to the outside of the clutch cover. Thus, dust inside the clutch cover assembly can be sufficiently discharged.

[0010]

1 shows a clutch cover assembly according to an embodiment of the present invention. In FIG. 1, a clutch cover assembly includes a clutch cover 10 and a clutch cover 1.
Toroidal pressure plate 11 arranged inside 0
And a diaphragm spring 12.

The clutch cover 10 is formed in a dish shape, and includes a flat portion 13 (annular portion) , an outer peripheral mounting portion 14,
It has a side surface portion 15 (outer peripheral portion) between the two. A large-diameter hole 16 is formed in the center of the flat portion 13. Further, a plurality of bolt holes 17 for fixing the clutch cover 10 to the flywheel are formed in the outer peripheral mounting portion 14. In addition, outer peripheral mounting part 1
4 have three openings 6 (FIGS. 1 and 3) for attaching a strap plate (not shown) to the clutch cover 10.
Reference) is formed. As shown in FIG.
And as shown in FIG. 4, the cutout 19 is formed.

As shown in FIGS. 1 and 2, six pivots 20 are formed at equal intervals in the circumferential direction so as to protrude into the flat portion 13. As shown in FIG. And this pivot 20
Thus, the outer peripheral end of the diaphragm spring 12 is supported. Therefore, the pivot 2 of the plane portion 13
The portion where no 0 is formed is out of contact with the diaphragm spring 12, and as shown in FIG. 1, there is a gap between the portion (non-contact portion 21) of the flat portion 13 and the diaphragm spring 12. A gap 22 is formed.

A plurality of dust holes 23 (discharge portions) are formed in the bent portion between the flat portion 13 and the side portion 15 of the clutch cover 10 and open radially outward. As is clear from FIG.
It is formed so that it may be connected in a straight line. As shown in FIGS. 1 to 3, the dust holes 23 are formed in regions A, B, and C in the non-contact portion 21 of the flat portion 13, that is, in portions where the opening 6 for attaching the strap plate is not formed. Are formed at predetermined intervals.

The pressure plate 11 holds the clutch disk 24 between the clutch disk 24 and the flywheel 25 to connect the clutch. The pressure plate 11 is provided on a surface opposite to the clutch disk 24,
The protrusion 26 is provided over the entire circumference. The diaphragm spring 12 is in contact with the projection 26.

The diaphragm spring 12 is a disk-shaped member arranged concentrically with the clutch cover 10, and its outer peripheral end is supported by a pivot 20 of the clutch cover 10. The diaphragm spring 12 uses the pivot 20 as an operating fulcrum, and attaches the protrusion 26 of the pressure plate 11 to the flywheel 2 at a radially intermediate portion thereof.
It is elastically pressed to the 5th side. The inner peripheral end of the diaphragm spring 12 is connected to a release device (not shown), and the inner peripheral end is pulled out to the transmission side (the right side in FIG. 1) so that the clutch disk 24 is pulled out.
Is disconnected.

In the clutch cover assembly having such a structure, when the flywheel 25 rotates, the clutch cover 10, the pressure plate 11, and the diaphragm spring 12 fixed to the flywheel 25 rotate. Then, dust such as sand and dust moves to the outer peripheral side in the radial direction due to centrifugal force. This dust moves further to the outer peripheral side through the gap 22 between the clutch cover 10 and the diaphragm spring 12, and as shown by the arrow in FIG.
Is discharged to the outside through the dust holes 23 formed in the bent portion 15. At this time, the dust is discharged in the directions indicated by the arrows from three places A, B, and C on the plane portion 13 shown in FIG. Therefore, dust does not collect between the outer peripheral end of the diaphragm spring 12 and the clutch cover 10, and
As a result, it is possible to prevent the release load from being adversely affected at the time of the release operation, or the pressing load of the diaphragm spring 12 from being adversely affected.

Further, as is apparent from FIGS. 2, 3 and 4, the dust hole 23 is formed so as to avoid the periphery of the opening 6 for attaching the strap plate. Can be avoided.

If the reduction in strength is not a problem, the dust holes 23 may be formed on the entire circumference except for the pivot 20.

[Effect of the Invention] In the clutch cover assembly according to the present invention, a pivot portion for supporting a diaphragm spring,
Since the clutch cover has the discharge portion that opens outward in the radial direction, dust that has entered the inside can be easily discharged, and the dust can be prevented from adversely affecting the characteristics.

[Brief description of the drawings]

FIG. 1 is a partial longitudinal sectional view of an embodiment of the present invention.

FIG. 2 is a plan view of a clutch cover.

FIG. 3 is a partial plan view of a clutch cover.

FIG. 4 is a perspective view in the IV direction of FIG. 3;

FIG. 5 is a partial longitudinal sectional view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Clutch cover 11 Pressure plate 12 Diaphragm spring 20 Pivot 23 Dust hole 24 Clutch disk 25 Flywheel

Claims (1)

(57) [Scope of request for utility model registration] An annular pressure plate for holding a clutch disk together with a flywheel; a disk-shaped diaphragm spring for elastically pressing the pressure plate toward the flywheel; Outer periphery that covers the outer periphery of pressure plate and diaphragm spring
The flywheel extending radially inward from the outer periphery.
A clutch cover having an annular portion opposed to the clutch cover, and the annular portion of the clutch cover is spaced apart circumferentially.
Only a plurality of the pivot portion for supporting the outer peripheral end of the disposed the diaphragm spring and is formed, the clutch cover in the circumferential direction each pivot portion
Between the diaphragm spring and the ring in the axial direction.
A clutch cover assembly, comprising: a plurality of discharge portions formed to open radially outward in a gap between the clutch cover portion and the shape portion .