JPH01210621A - Clutch fastening structure for vehicle - Google Patents

Abstract

PURPOSE:To reduce man-hours of working and assembling by providing projections in the axial line on both a projection of a pressure plate and a band member mount of a clutch cover and caulking these projections to fasten the band member. CONSTITUTION:A pressure plate 1 made of steel plate is provided with an annular plate portion 1c and a radially projecting portion 1a. Projections 1b, 5h are provided on the projection 1a and a strap 6 mount 5g of a clutch cover 5. These projections 1b, 5h are caulked to fasten the strap 6. Thus, conventional rivets can be dispensed with to make the rivet hole boring and riveting unnecessary, so that the man-hours of working and assembling can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a fastening structure for a vehicle clutch, and more particularly to a fastening structure for a band member that connects a pressure plate and a clutch cover.

(Prior art) A conventional friction clutch includes an input-side drive member, a clutch cover that forms an axial space between the drive member and protects the drive member from rotating together, and a latch cover that includes a clutch cover near the outer periphery inside the latch cover. a diaphragm-shaped spring member disposed to be supported by the clutch cover; and a pressure plate that rotates integrally with the clutch cover via the band member and is biased toward the drive member by the diaphragm-shaped spring member.

There is a friction clutch that includes a clutch disc that is detachably disposed between the pressure plate and the drive member via a friction member.

The above-mentioned conventional metal strap members are fastened using rivets. That is, as shown in FIG. 6.7, rivet holes 21a and 20a are provided in the pressure plate 21 and clutch cover 2o, respectively, and the rivet 22 is passed through these holes and the metal band member, that is, the strap 28, and the rivet 22 is inserted into the pressure plate 21 and the clutch cover 2o. The straps were fastened with rivets.

(Problem to be solved by the invention) However, conventional riveting requires rivet drilling and riveting, which increases the number of processing steps and takes time. This has the problem of increased weight.

Further, the conventional pressure plate 21 is made of a thick cast material (for example, gray cast iron JIS Fe12), and there are problems with the strength and weight of the material.

Accordingly, one object of the present invention is to provide a novel fastening structure for a vehicle clutch that solves the above-mentioned problems.

(Means for Solving the Problems by the Invention) The vehicle clutch fastening structure of the present invention includes an input-side drive member, a clutch cover that rotates integrally with the drive member, and a pressure member that is connected to the clutch cover via a band member. a clutch disc disposed between the pressure plate and the drive member and rotatably engaged with the output side driven member; and the clutch disc is removably pressed against the drive member via the pressure plate. The pressure plate has a ring-shaped plate portion made of a steel plate and a radial protrusion integrally formed with the plate portion on the outer circumference of the plate portion, an axial protrusion is provided on the clutch cover, an axial protrusion is provided on the attachment portion of the band member of the clutch cover, and the band member is fastened to the protrusion and the attachment portion by caulking these protrusions. do.

Preferably, each of the axial projections is formed by press working. It is also preferable that each of the axial projections is an axial rivet-like projection.

It is also preferable that the pressure plate has an axial protrusion on the outer circumference of the plate portion.

The protruding portion can also be formed by bending the outer peripheral portion of the plate portion in the axial direction by press working.

It is preferable that this protrusion is provided continuously along the outer circumference. This allows the pressure plate to have great rigidity even if it is a thin plate.

The steel plates used for pressure plates must be processed by press, that is, be easy to plastically work, and be cold-worked.
One example is that it has good hot workability. 1. For example, rolled steel plate JIS 5PCC, 5AP
There are II, etc.

The pressure plate and the caulking protrusion formed on the protrusion thereof can be easily formed by press working using these steel plates.

(Example) Hereinafter, nine examples of the present invention will be described based on the drawings. Second
The figure is a front view of a clutch cover equipped with the fastening structure of the present invention.
FIG. 3 is a sectional view of the same.

The clutch cover 5 has a flange portion 5a attached to the drive member, that is, the outer peripheral end surface 2 of the flywheel 2 shown by the two-dot chain line.
This flywheel 2 is brought into contact with
is integrally attached to. This clutch cover 5 forms an axial space 11 between the side surface portion 5C and the flywheel 2 via the body portion 5b. The flywheel 2 is drivingly connected to an engine-side input shaft (not shown).

The diaphragm spring 3 includes a plurality of fingers 3a facing inward in the radial direction, and a groove 3b formed near the outer circumference of the diaphragm spring between these adjacent fingers is engaged with a claw portion, that is, a tab 5d, of the cover 5. Both side surfaces near the groove are held between fulcrum members, that is, the pivot ring 4 and the protruding fulcrum portion 5e, and the cover 5 is positioned and supported via these fulcrum portions and tabs. A plurality of tabs 5d are formed circumferentially on the inner end of the side surface 5C of the clutch cover 5, and extend radially inward through the groove 3b. These tabs 5d are bent radially outward during assembly, thus allowing the diaphragm spring 3
is supported inside the cover 5. A plurality of grooves 5f are formed along the circumferential direction on the inner peripheral edge of the front side of the clutch cover.
is formed. These grooves 5f are formed alternately with tabs 5d. A protruding fulcrum portion 5e that protrudes in the axial direction is formed on the back side surface of the cover where these grooves 5f are formed. The diaphragm spring 3 has its one side abutted against these protruding fulcrum portions 5e, and the other side abutted against the pivot ring 4 supported by the tab 5d,
It is held between these fulcrum members, positioned and supported by the clutch cover 5. The diaphragm spring 3 is rotated about the abutment fulcrum by pressure acting on the tip of the finger 3a, and the diaphragm spring itself acts as a release lever.

A pressure plate 1 is arranged adjacent to a diaphragm spring 3. This pressure plate 1 is connected to a clutch cover 5 via three tangential straps 6 which are caulked to protrusions 1a provided on the outer periphery of the pressure plate 1 so as to protrude in the radial direction.

This pressure plate 1 is attached to a cover 5 by a strap 6.
It is rotatably driven and movable in the axial direction. Further, the pressure plate 1 is positioned between the pressure plate 1 and the clutch cover 5 by the cover 5 in an elastically compressed state of the diaphragm spring 3.
It is constantly pressed on the side.

A clutch disc 12 (shown schematically with a two-dot chain line) is arranged concentrically between the pressure plate 1 and the flywheel 2 via a friction member.
is rotatably engaged with an output shaft (not shown). The rotational force on the input side is transmitted to the output side via this clutch disc by the friction torque generated between the abutting friction surfaces by the pressing force of the pressure plate.

FIG. 4 is a front view of the pressure plate 1 of this embodiment, and FIG. 5 is a sectional view taken along line A--A in FIG.

This pressure plate 1 is formed by forming a thin steel plate by press working, and includes a ring-shaped plate portion 1c,
The plate portion 1c has a radial protrusion 1a integrally formed with the plate portion 1c at its outer peripheral edge. Furthermore, this pressure plate has a protrusion 1 formed by bending the outer circumferential portion of the plate portion 1c slightly inward in the axial direction.
It has d.

The protrusion 1d is provided continuously in the circumferential direction, and three protrusions 1a are provided in the radial direction so as to divide the protrusion 1d into three equal parts.

The tip end surface 1e of the protrusion comes into contact with the outer peripheral surface 3c of the diaphragm spring 3, and the pressure plate 1 is urged toward the flywheel 2 by the diaphragm spring via this contact surface.

Each protrusion 1a is provided with a rivet-like protrusion, that is, a hollow cylindrical protrusion 1b, which replaces the caulking head of a rivet. A groove 1h is formed on the side surface of the protrusion on the friction surface 1f side of the pressure plate.

The protrusion 1b is formed by pressing the bottom surface of the groove in the axial direction and protruding toward the opposite side.

Similarly, as shown in FIG. 1, a rivet-like protrusion 5h is also formed on the strap 6 attachment portion 5g of the clutch cover 5. The protrusion 5h is formed by pressing a groove bottom surface 5j formed on the front side surface of the mounting portion 5g toward the pressure plate 1 side in the axial direction.

Both ends of the strap 6 are slightly bent, and each surface of these ends forms an abutment surface between the strap mounting surfaces 1h and 5 of the pressure plate 1 and the clutch cover 5, and these pressure plates and can be attached to the clutch cover. Furthermore, holes 6a and 6b for fitting rivet-like protrusions are provided at both ends.

To fasten the strap to the pressure plate and the clutch cover, the rivet-like protrusions 1b and 5h are fitted into the fitting holes 6a and 6b, and these protrusions are swaged and fastened by the swage. That is, a hole 6a provided at one end of the strap 6 is fitted into the pressure plate side protrusion 1b, a hole 6b at the other end of the strap is fitted into the clutch cover side protrusion 5h, and the strap is engaged with both protrusions. After that, these protrusions are caulked in the axial direction to secure both ends.

Note that the material of the pressure plate 1 is conventional casting CFC.
The heat capacity of this pressure plate changes due to the change from steel plate to steel plate. Therefore, in order to take into account the influence of the friction material on the friction characteristics, the ring-shaped plate 7
A fin member 7 having a plurality of fins 7a formed in the circumferential direction of b is welded to the non-friction surface side 1g of the pressure plate. This fin member 7 can improve the cooling performance of the pressure plate.

Next, the operation of the clutch will be explained.

When the clutch pedal is depressed, a release bearing (not shown) moves in the direction of arrow B, and a pressing force acts on the tip of the finger 3a of the diaphragm spring through the release bearing.

This pressing force causes the diaphragm spring 3 to act as a release lever, and the outer peripheral portion 3d rotates counterclockwise around the pivot ring 4. As a result, the pressure plate 1 is released from the oppression caused by the spring force of the spring 3 and is pressed in the direction of arrow C by the spring force of the strap 6, so that the friction surface 1 of the pressure plate 1
f separates from the clutch disc 12, thereby disengaging the clutch. The measuring contact surfaces 1e and 3c are brought into contact with each other by the spring force of the strap 6 when the clutch is released, and this state is maintained.

Further, when the clutch is engaged, the release bearing that is in pressure contact moves in the direction of arrow C, and as a result, the spring 3 is also released from its pressure, and its elasticity causes the outer peripheral portion 3d to rotate clockwise around the protruding fulcrum portion 5e. The clutch cover 5 rotates around the clutch cover 5, and presses the pressure plate 1 through the projection 1d with a pressing force corresponding to the amount of deflection determined by the clutch cover 5, and the pressure plate 1 is pressed in the direction of the arrow B.

This pressing force generates friction torque on the friction surface 1f of the pressure plate 1, and the clutch is engaged.

(Effects of the Invention) As described above, the vehicle clutch fastening structure of the present invention includes a pressure plate having a ring-shaped plate portion made of a steel plate and a radial protrusion portion integrally formed with the plate portion. Axial protrusions are provided on both the protruding portion and the band member attachment portion of the clutch cover, and these projections are caulked to tighten the band member.

With this configuration, the band member can be fixed by caulking, and conventional rivets can be eliminated. As a result, rivet drilling and rivet tightening work is no longer necessary.

It is possible to reduce processing man-hours and assembly labor. Furthermore, the weight of the clutch is reduced by the amount of rivets used, contributing to the weight reduction of the clutch.

Furthermore, the single-piece configuration allows the caulking protrusion to be press-molded. As a result, this protrusion can be easily formed by press working.

Yet again. Pressure plates made of steel plates can also be made stronger, lighter, and more precise, and can also be press-formed, making it possible to significantly reduce the number of manufacturing steps and processing steps.

[Brief explanation of the drawing]

1 is a cross-sectional view of the clutch fastening structure of the present invention taken along arrow E in FIG. 2, FIG. 2 is a front view of a clutch cover equipped with the present fastening structure, and FIG. 3 is a cross-sectional view taken along the line D-D in FIG. Fig. 4 is a front view of the pressure plate of this embodiment, Fig. 5 is a cross-sectional view taken along the line A-A in Fig. 4, Fig. 6 is a front view of a conventional clutch cover, and Fig. 7 is Fig. 6 F-F. A line sectional view is shown, respectively. 1...Pressure plate. 3...Diaphragm spring. 4...Pivot ring. 5...Clutch cover. 6...Strap. lb, 5h...protrusion.

Claims (1)

[Scope of Claims] 1. An input-side drive member, a clutch cover that rotates integrally with the drive member, a pressure plate that is connected to the clutch cover via a band member, and the pressure plate and the drive member A friction clutch comprising: a clutch disc disposed between the drive member and the output driven member; and a spring member that removably presses the clutch disc against the drive member via the pressure plate. , the pressure plate has a ring-shaped plate portion made of a steel plate and a radial protrusion integrally formed with the plate portion on the outer periphery of the plate portion, an axial protrusion is provided on the protrusion, and the clutch cover A fastening structure for a vehicle clutch, characterized in that an axial protrusion is provided on an attachment portion of the band member, and the band member is fastened to the protrusion and the attachment portion by caulking these protrusions. 2. The fastening structure according to claim 1, wherein each of the axial projections is formed by press working. 3. The fastening structure according to claim 1 or 2, wherein each of the axial projections is an axial rivet-like projection. 4. The fastening structure according to claim 1, 2 or 3, wherein the pressure plate has an axial protrusion on the outer periphery of the plate portion. 5. The fastening structure according to claim 4, wherein the protruding portion is formed by bending the outer peripheral portion of the plate portion in the axial direction by press working.