192 clutches and power-stop control – Clutches – Axially engaging
Patent
1990-04-06
1991-12-17
Bonck, Rodney H.
192 clutches and power-stop control
Clutches
Axially engaging
192113A, F16D 1372
Patent
active
050728164
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Technical Field
The present invention relates to a pull type clutch for releasing the clutch by pulling a release bearing rearward in the axial direction on the opposite side of a pressure plate side, comprising a diaphragm spring having an extended opening disposed at an outward end portion of a radial slit, supporting the outside fulcrum part of the diaphragm spring by a clutch cover, abutting the intermediate fulcrum part to the fulcrum land of the pressure plate, and supporting the inside fulcrum part with the release bearing.
2. Background Art
In the pull type clutch of this sort, an outside fulcrum part C1 of a diaphragm spring 8 is, as shown in FIG. 3, supported on a clutch cover 1, an intermediate fulcrum part C2 abuts against a fulcrum land 10 of a pressure plate 7, and an inside fulcrum part C3 is engaged with a release bearing 12. The pressure plate 7 and clutch cover 1 are linked together by way of an elastic strap plate 4 so as to be rotatable as one body, and by pulling the inside fulcrum part C3 rearward by a release bearing 12, the pressure plate 7 moves backward by the elasticity of the strap 4, thereby disengaging the clutch.
Besides, in order to sent a cooling air to the pressure plate 7, an air feeder 48 having an air scoop portion is provided, and air is introduced into the pressure plate 7 area from outside through the feeder 48.
In such conventional structure, however, while the clutch is released, the pressure plate vibrates in the axial direction, due to engine vibrations, which may cause the pressure plate 7 to contact and rotate facing 6.
It is, hence, a primary object of the invention to securely move the pressure plate in the clutch releasing directly and eliminate the phenomenon of accompaying rotation due to engine vibration by specifically shaping the air feeder.
DISCLOSURE OF INVENTION
Technical Means
To achieve the above object, the invention presents a pull type clutch for releasing the clutch by pulling a release bearing rearward in the axial direction on the opposite side of a pressure plate side, comprising a diaphragm spring having an extended opening disposed at an outward end portion of a radial slit, supporting the outside fulcrum part of the diaphragm spring by a clutch cover, abutting the intermediate fulcrum part to the fulcrum land of the pressure plate, and supporting the inside fulcrum part with the release bearing, wherein an air feeder is disposed on the rear surface of the diaphragm spring with the mounting pedestal of the air feeder is affixed to the pressure plate through the opening, in the diaphragm spring. A protrusion, projecting onto the diaphragm spring side, is formed on the air feeder. The intermediate fulcrum part of the diaphragm spring is held between the protrusion and the fulcrum land of the pressure plate.
Operation
When the release bearing is pulled rearward to release the clutch, the diaphragm spring is moved (deformed) rearward around the fixed point of the outside fulcrum part. Because the intermediate fulcrum part of the diaphragm spring is held on the fulcrum land of the pressure plate and because of the protrusion of the air feeder, the pressure plate moves rearward together with the diaphragm spring, so that the clutch is securely disengaged.
Besides, since the pressure plate is always in contact with the diaphragm spring, contact between the clutch disc and the pressure plate, due to engine vibrations, is prevented, and simultaneous rotation is prevented.
While the clutch is rotating, meanwhile, the air feeder takes in the air from outside the scoop portion and supplies such air to the pressure plate to cool the pressure plate.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is a longitudinal sectional view of a pull type clutch according to the invention, FIG. 2 is a partial perspective view of FIG. 1, and FIG. 3 is a longitudinal sectional view of prior art.
BEST MODE FOR CARRYING OUT THE INVENTION
In FIG. 1 showing a pull type clutch according to the invention, a clutch disc 5 has its inner spline hub spline fitted
REFERENCES:
patent: 4865174 (1989-09-01), Takeuchi
patent: 4947973 (1990-08-01), Takeuchi
Mizuguchi Kimio
Takeuchi Hiroshi
Bonck Rodney H.
Kabushiki Kaisha Daikin Seisakusho
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