JPH05231440A - Clutch cover assembly body - Google Patents

Abstract

PURPOSE:To make constant the energizing force of an energizing member, regardless of a change with laps of time by providing the energizing member with a slope in a direction along the rotation of a clutch cover assembly body, and forming notches around the external surface of the member at the predetermined intervals. CONSTITUTION:The external section of a clutch cover body 2 is exposed to a high temperature condition, due to the engaging and disengaging operation of a pressure plate 9, and heat is conducted to an energizing member 10 as well. An air flow shown by an arrow is generated inside the clutch cover body 2, due to the rotating motion thereof, and introduced outward along the radial direction of the member 10 with the slope 12 of the member 10. Furthermore, the air flow passes notches 13 on the external surface of the member 10 and reaches the internal surface of the body 2. Then, the air flow is released outside the body 2 via a slit 2a on the side of the body 2. According to this construction, the member 10 can generate a constant energizing force without undergoing an influence of heat generation, and can be operated with a stable operating force.

Description

Detailed Description of the Invention

[0001]

[Object of the Invention]

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch mechanism for connecting and disconnecting power between a driving member and a non-driving member, and a clutch having a pressure plate for urging a clutch disc toward the driving side. The present invention relates to a cover assembly.

[0003]

2. Description of the Related Art A conventional technique related to the present invention will be described with reference to FIG.

Referring to FIG. 6, reference numeral 50 denotes a clutch cover fixed to a flywheel 51 which is a drive side member, and a pressure plate 53 for pressing the clutch disc 52 toward the flywheel 51 side is housed therein. is doing. The pressure plate 53 is engaged with the diaphragm spring 54 at the outer peripheral portion on the clutch cover 50 side. The diaphragm spring 54 is held on the inner peripheral portion of the clutch cover 50, and the pressure plate 53 acts so as to press the clutch disc 52 toward the flywheel 51 side with the holding portion as a fulcrum. A cone spring 55 that presses the diaphragm spring 54 toward the clutch cover 50 is held between the diaphragm spring 54 and the pressure plate 53 in the holding portion of the clutch cover 50 together with the diaphragm spring 54. .. This conventional technique is disclosed in Japanese Utility Model Laid-Open No. 1-154333.

[0005]

Clutch disc 52
Flywheel 51 when it wears over time.
When the clutch plate 52 is engaged with the pressure plate 53, the pressure plate 53 is further urged toward the flywheel 51 side compared to when the clutch disk 52 is started to be used, and the diaphragm spring 54 corresponds to the amount of wear of the clutch disc 52. 53 was urged to the flywheel 51 side. Therefore, the pressure bearing plate 53 is attached to the clutch cover 50 by the release bearing mechanism.
When operated to the side, a force against the biasing force of the diaphragm spring 54 generated corresponding to the amount of wear of the clutch disc 52 is required, and the operating force of the release bearing mechanism is correspondingly increased. In order to make the operating force approximate to the state where the clutch disc 52 is not worn, the diaphragm spring 54 is attached to the clutch cover 5.
The cone spring 55 for urging to the 0 side is arranged.

Frequent engagement / disengagement of the clutch disc 52 may generate a large amount of frictional heat, which may heat the cone spring 55 and prevent the cone spring 55 from providing a normal biasing force due to the heat effect. there were.

The present invention has been made to solve the above-mentioned problems of the prior art, and it is a technical object of the present invention to provide a clutch cover assembly which can always maintain a constant clutch operating force. It is what

[0008]

[Constitution of the invention]

[0009]

The technical measures taken to solve the above technical problems are as follows: the outer peripheral part of the diaphragm spring is pressed against the pressure plate, the inner peripheral part is connected to the release bearing mechanism, and the clutch Supports are provided at a plurality of circumferentially spaced intervals on the inner peripheral edge of the cover body, projecting toward the pressure plate through slit holes in the radial middle of the diaphragm spring, and the outer peripheral portion of the diaphragm spring and the pressure plate. In the clutch cover assembly having a biasing member for applying a biasing force to the clutch cover body, the biasing member has an inclined surface inclined with respect to the direction in which the clutch cover assembly rotates, and That is, the notches are formed in the outer peripheral edge portion of the member at a predetermined interval.

[0010]

By taking the above technical means, the cone spring can urge the diaphragm spring with a constant pressing force even when the clutch disc wears due to aging of the clutch disc. Since it is possible to avoid excessive heat generation of the member itself, it is possible to make the urging force of the urging member constant irrespective of changes over time.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, preferred embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a front view of a clutch cover assembly 1 showing an embodiment of the present invention. The clutch cover assembly 1 is composed of a clutch cover body 2 and a diaphragm spring 3. The diaphragm spring 3 is held on the inner peripheral portion of the clutch cover body 2 by a known method. The diaphragm spring 3 itself is an annular plate member and has a plurality of projecting portions 3a at equal intervals toward the inner peripheral portion. A release bearing mechanism 4 (not shown) can be engaged with the tip of the projecting portion 3a as shown by the alternate long and short dash line. Slit holes 5 are formed in the outer peripheral portion of the diaphragm spring 3 at equal intervals, and the diaphragm spring 3 bends a part of the inner peripheral portion of the clutch cover body 2 to allow a pivot ring 6 described later to intervene. The clutch cover body 1 is integrally fixed to the clutch cover body 2 to form the clutch cover assembly 1 as a whole.

FIG. 2 is a sectional view taken along the line I--I of FIG. 1, and the clutch cover assembly 1 is integrally fixed to a flywheel 7, which is a drive-side member (not shown). .. Between the flywheel 7 and the clutch cover main body 2, the clutch disc shown by 8 in FIG. 2 is constantly pressed in the direction of the flywheel 7 without operating the release bearing mechanism 4 in the clutch cover main body 2. A biasing pressure plate 9 is housed. The pressure plate 9 constantly urges the clutch disc 8 toward the flywheel 7 by the diaphragm spring 3 or the like, and the diaphragm spring 3 is rotated by the pivot ring 6.
Are disposed on the front and back sides of the slit hole 5 in the radial middle portion of the diaphragm spring 3, and the inner peripheral portion of the clutch cover main body 2 is processed so as to wrap around the pivot ring 6, and the diaphragm spring 3 is fixed to the clutch cover main body 2. is doing. The diaphragm spring 3 is swingable around the contact point with the pivot ring 6 as a fulcrum. The outer peripheral edge portion 3b of the diaphragm spring 3 is engaged with a portion 9b formed on the outer peripheral edge portion 9a of the pressure plate 9 and protruding toward the clutch cover body 2 side.

A biasing member 10 for generating a biasing force for the diaphragm spring 3 toward the clutch cover main body 2 is disposed between the diaphragm spring 3 and the pressure plate 9. The biasing member 10 is fixed to the clutch cover body 2 by a pivot ring 6 on the pressure plate 9 side. The inner peripheral portion of the urging member 10 approaches the diaphragm spring 3 as the urging member 10 is deformed, but the inner peripheral portion of the urging member 10 passes through the slit hole 5 of the diaphragm spring 3 and becomes a diaphragm spring. The interference with 3 can be avoided. In this embodiment, the urging member 10 is a cone spring having a substantially V-shaped cross section, and its inner peripheral edge portion passes through the slit hole 5 of the diaphragm spring. Any type may be used as long as it is pressed and urged toward the main body 2 side and does not interfere with the diaphragm spring 3 when the urging force is generated.

FIG. 3 is a sectional view of a clutch disc assembly 1 showing another embodiment of the present invention, in which the diaphragm spring 3 and the biasing means 10 are fixed to the clutch cover main body 2 by rivets 12. Shows.
According to this, the diaphragm spring 3 and the biasing means 10 can be processed without processing the inner peripheral edge of the clutch cover body 2.
Etc. can be fixed to the clutch cover body 2. Since the other parts are the same as those of the above-described embodiment, detailed description will be omitted.

FIG. 4 is a front view showing the biasing member incorporated in the clutch cover assembly which is clearly defined in the claims of the present invention. At the inner peripheral edge of the biasing member 10, there are provided projections 11 that project inward in the radial direction at predetermined intervals. Further, a part of the protruding portion 11 is formed so as to be the protruding portion 11 having two protruding end portions 11a and 11b at the tip with a predetermined interval. This protruding end 11
The a and 11b are formed so as to engage with the pivot ring 6 described above, and can be fixed to the clutch cover main body. The protrusion 11 has an inclined surface 12 that is slightly inclined in the rotation direction in the state of being incorporated in the clutch cover assembly.

Further, a notch 1 is formed inwardly in the radial direction so that the outer circumferential circle of the biasing member 10 has a predetermined space.
3 is formed all around.

Next, the operation of the present invention will be described.

When the friction engagement surface of the clutch disc 8 is abraded due to a change with time, the pressure plate 9 also comes close to the flywheel 7 in the direction of the flywheel 7.
Is pressed and urged to maintain the engaged state of the clutch. Therefore, the diaphragm spring 3 and the pressure plate 9
The projecting portion 9b of is also displaced from the position close to the clutch cover body 2 to the position close to the flywheel 7. Therefore, the diaphragm spring 3 tilts counterclockwise around the fulcrum of the pivot ring 6. Therefore, when the clutch disc 8 is brought into the non-engaged state, the operating force of the release bearing mechanism 4 needs to be as large as the biasing force generated by the inclination of the diaphragm spring 3. The biasing member 10 fixed to the diaphragm spring 3 via the pivot ring 6 acts to cancel the biasing force generated by the inclination of the diaphragm spring 3. That is, it acts so as to urge the diaphragm spring 3 toward the clutch cover body 2 side. When the diaphragm spring 3 is tilted so as to generate a biasing force on the biasing means 10, the protrusion 11 that projects inward in the radial direction of the biasing means 10 is a diaphragm spring 3.
Since they both pass through the slit hole 5, the biasing means 10 biases the diaphragm spring 3 toward the clutch cover main body 2 side while maintaining the desired posture. Will act as if to. That is, the urging means 10 urges the diaphragm spring 3 toward the clutch cover body 2 side,
It acts so as to reduce the operating force of the release bearing mechanism 4.

At this time, the outer peripheral portion of the clutch cover assembly 2, that is, the clutch disk is frequently engaged and disengaged, that is,
The portion where the pivot ring 6 is disposed is exposed to a high temperature state by the engagement / disengagement operation of the pressure plate. At this time, naturally, heat is also transmitted to the biasing member 10 and the biasing member 10 also generates heat. Since the spring characteristics of the biasing member 10 itself may change due to heat generation, it is necessary to radiate heat to secure the spring characteristics. FIG. 5 is a partial cross-sectional view of the outer peripheral portion of the clutch cover assembly 1 for explaining the heat radiation effect of the biasing member 10. The clutch cover assembly 2 generates an air flow therein, which is indicated by an arrow, by the rotating operation of the clutch cover assembly 2, and the air flow is guided outward in the radial direction of the biasing member 10 by the inclined surface 12 formed on the biasing member 10. Then, the air flow passes through the notch 13 formed on the outer peripheral portion of the biasing member 10 and reaches the inner wall surface of the clutch cover body 2. Then, this air flow is formed by a slit 2a formed on the side surface of the clutch cover body 2.
Will be released to the outside of the clutch cover assembly 1.

[0021]

As described above, it is needless to say that the operating force of the release bearing mechanism for bringing the clutch disc into the disengaged state can be reduced even if the disc portion wears due to the change over time of the clutch disc. That is, since the urging member that generates a force that opposes the urging force of the diaphragm spring generates a constant urging force regardless of the influence of heat generation, a clutch cover assembly that can be operated with a stable operating force can be provided. It became so.

[Brief description of drawings]

FIG. 1 is a front view of a clutch cover assembly according to an embodiment of the present invention.

FIG. 2 is a sectional view of the clutch cover assembly according to the first embodiment of the present invention taken along the line II of FIG.

FIG. 3 is a sectional view of a clutch cover assembly of a second embodiment of the present invention corresponding to FIG.

FIG. 4 is a front view of a biasing member incorporated into a clutch cover assembly that is clearly defined in the claims of the present invention.

FIG. 5 is a partial cross-sectional view of the outer peripheral portion of the clutch cover assembly for explaining the heat radiation effect of the biasing member.

FIG. 6 is a partial cross-sectional view of a clutch quilt cover assembly according to the prior art.

[Explanation of symbols]

 3 Diaphragm spring 9 Pressure plate 4 Release bearing mechanism 2 Clutch cover body 5 Slit hole 10 Energizing member 1 Clutch cover assembly 12 Inclined surface 13 Notch

Claims (1)

[Claims] 1. The radius of the diaphragm spring is provided at a plurality of circumferentially spaced locations on the inner peripheral edge of the clutch cover body, with the outer peripheral portion of the diaphragm spring being pressed against the pressure plate and the inner peripheral portion being connected to the release bearing mechanism. In a clutch cover assembly having a support portion projecting to the pressure plate side through a slit hole in the intermediate portion in the direction, and having a biasing member for imparting a biasing force to the clutch cover body between the outer peripheral portion of the diaphragm spring and the pressure plate. The clutch cover assembly is characterized in that the biasing member has an inclined surface that is inclined with respect to the direction in which the clutch cover assembly rotates, and that notches are formed at predetermined intervals in the outer peripheral edge portion of the biasing member. Three-dimensional.