US 5,638,933 AGranted

Clutch device

AssigneeToyota Jidosha Kabushiki Kaisha

InventorsShogo Matsumoto, Kiyohito Murata

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Abstract

This clutch device has a first cam mechanism and a second cam mechanism disposed on a relatively rotatable a pair of members. When the first cam mechanism is pushed by a piston to one of the pair of members rotating in a direction, the first cam mechanism generates a thrust force corresponding to an input torque and thereby the relatively rotating members are engaged. When the second cam mechanism is pushed by a piston to one of the pair of members rotating in a reverse direction, the second cam mechanism generates a thrust force corresponding to the pushing force of the piston, and thereby the relatively rotating members are engaged. A return spring giving a biasing force to separate the second cam member from the one of relatively rotating member is designed not to reduce the thrust force generated by the first cam member during the action of the first cam mechanism.

Claims13

Dependent claims

A clutch device comprising:

a pair of members disposed at a distance on a common axis and relatively rotating to each other around said common axis;
a cam mechanism disposed on said common axis and composed of a first cam mechanism and a second cam mechanism,
said first cam mechanism being composed of a pair of cam members and generating an axial thrust force corresponding to rotational torque in order to engage said pair of members after being pushed by a pushing means to one of said pair of members rotating in a direction and thereby causing a frictional engagement of one of said pair of cam members with said one of said pair of members rotating in said direction, and
said second cam mechanism being composed of a pair of cam members and generating an axial thrust force corresponding to a pushing force of said pushing means in order to engage said pair of members after being pushed by said pushing means to one said pair of members rotating in a direction reverse to said direction in which said first cam mechanism generates said axial thrust force corresponding to rotational torque and thereby causing a frictional engagement of one of said pair of cam members with said one of said pair of members rotating in said reverse direction,
a biasing means for supplying a biasing force acting on said cam mechanism in a direction contrary to a direction of said pushing force of said pushing means,
wherein said axial thrust force generated by said first cam mechanism is kept free from being weakened by said biasing force supplied by said biasing means.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 08/618,894Filed 20 Mar 1996
Priority: JP 7-06625224 Mar 1995
Granted: 17 Jun 1997
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

F16D 25/02
Fluid-actuated clutches: with means for actuating or keeping engaged by a force derived at least partially from one of the shafts to be connected
F16D 55/48
With self-tightening action: with discs or pads having a small free angular travel relative to their support, which produces the self-tightening…
F16H 57/08
General details of gearing: of gearings with members having orbital motion
F16D 2023/123
Mechanical clutch-actuating mechanisms arranged outside the clutch as such: clutch actuation by cams, ramps or ball-screw mechanisms