192 clutches and power-stop control – Clutches – Operators
Patent
1992-01-22
1993-02-02
Lorence, Richard
192 clutches and power-stop control
Clutches
Operators
192 98, 192DIG1, 192 85CA, F16D 2314, F16D 2508
Patent
active
051831414
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a friction clutch of a pull-type clutch for use in an automobile etc., and particularly to a mechanism especially suitable for a release mechanism designed to move a release bearing by actuating a hydraulic cylinder disposed in a clutch housing.
BACKGROUND ART
The release mechanism of this type is described in U.S. Pat. No. 4,687,084, for example. In the mechanism described therein, a release bearing assembly, connected to a diaphragm spring, and a hydraulic cylinder assembly, secured to a clutch housing, are assembled as separate elements and are connected together at the final stage of assembly work.
For the purpose of connecting the separate elements, plural claws are formed on both the release bearing assembly and the cylinder assembly with spaces left between the claws in circumferential direction. The claws of cylinder assembly are placed between the claws of release bearing assembly, and the claws are then connected, in axial direction, by a ring engaging with grooves provided on the outer peripheries of the claws. In this mechanism, the connecting ring is previously engaged with the grooves of the claws of the release bearing assembly in the assembly work. At the final stage of assembly work, when the entire cylinder assembly is moved forward from a backside position of the release bearing assembly, the claws of cylinder assembly temporarily expand and pass through the connecting ring. At the moment the claws reach a specified position, the connecting ring engages the grooves of both claws. Thus, the assembly work is carried out comparatively easily.
However, the above mechanism is not designed to disconnect one-side claws from the other-side claws, easily, when the clutch is to be disassembled. Consequently, it is hard to disconnect the release bearing assembly from the cylinder assembly.
The present invention provides a mechanism for overcoming the above-mentioned problem.
DISCLOSURE OF THE INVENTION
In the present invention, a pull-type clutch is disengaged by pulling an inner peripheral part of a diaphragm spring to an axial backside of the clutch. A release mechanism, including a release bearing assembly, for the pull-type clutch, is connected to the inner peripheral part of the diaphragm spring. A cylinder assembly is mounted to a housing of the clutch at an axial backside of the release bearing assembly. Plural first claws, extending backward in an axial direction, are formed on the release bearing assembly. Plural second claws, extending forward in the axial direction, are integrally formed on a piston of the cylinder assembly. The first and second claws are disposed with clearances left between them in a circumferential direction, respectively, so as to permit the second claw to get in between the adjacent two first claws in the circumferential direction of clutch. A connecting ring, extending in the circumferential direction and expandable in radial directions, is installed on outer peripheries of the second claws in such a manner as to be immovable in the axial direction of the clutch. Connecting grooves, in which the connecting ring fits immovably in the axial direction, are formed on outer peripheries of the first claws. Guide portions are formed on rear end outer peripheries of the first claws. The guide portions are engagable with an inner periphery of the connecting ring and expand the ring when the connecting ring moves forward relative to the rear end from its backward position. A ring stopper, movable between a front releasing position and a rear engaging position, together with a stopper spring for urging the stopper backward, are installed in the release bearing assembly. The ring stopper fits onto an outer periphery of the connecting ring fitting in the connecting grooves at the engaging position. Tool supports, facing each other with an axial tool insertion clearance therebetween are provided on the ring stopper and the cylinder assembly.
According to the above-mentioned structure, in the assembly work, the entire cylinder asse
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Abe Minoru
Takano Tetsuji
Kabushiki Kaisha Daikin Seisakusho
Lorence Richard
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