192 clutches and power-stop control – Clutches – Automatic
Patent
1998-05-07
2000-04-25
Marmor, Charles A
192 clutches and power-stop control
Clutches
Automatic
192 545, 192 6982, 192 93A, 192 431, F16D 4106
Patent
active
060532939
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND ART
The present invention relates to a clutch unit which intervenes in a rotating force transmission channel and is able to transmit or interrupt torque, and in particular relates to a clutch unit which is designed so as to transmit torque in a normal or reverse direction from the input system to the output system while a drive source is operating and to enable manual operations of the output system by interrupting torque while the drive source is in pause.
A two-way clutch according to the invention is able to be utilized for a power window of automobile and for an opening and closing mechanism of an electro-slide door, electro-drive curtain, electro-drive shutter, etc. in a one-box passenger car.
For example, an electro-slide door of automobile (one-box passenger car) is usually designed so that rotation of a drive motor is reduced by worm gears and is further transmitted via an electromagnetic clutch. Since the reduction ratio of the worm gears is generally large, it is necessary to provide the same with a means for opening the connection between the drive motor and an output shaft in order to enable manual operations when the drive motor comes to a stop. Therefore, an electromagnetic clutch is caused to intervene therebetween, thereby enabling a manual input, that is, manual door opening and closing, at the output shaft side.
In a case where an electromagnetic clutch is used, there remains a problem in view of reliability in addition to a problem, by which the consumption power is increased and the control system thereof is complicated, because the electromagnetic clutch is electrically controlled.
DISCLOSURE OF INVENTION
It is therefore an object of the invention to provide a two-way clutch which is able to securely transmit and interrupt torque between an input system and an output system and is not influenced by any external force even though the external force is given from the output system side while transmitting torque (that is, does not make any overrunning).
In order to achieve the above object, in one aspect of the invention a two-way clutch unit is constructed so that the same comprises an input system rotating member driven and rotated by a drive source, an output system rotating member for outwardly taking out torque transmitted from the input system rotating member, and a torque transmission member interposed between the rotating members and being selectively engageable with and disengageable from both rotating members, wherein the torque transmission member is able to transmit torque in either of normal or reverse direction when the same is engaged with the input system rotating member, and the output system rotating member is freely rotatable only when the torque transmission member is disengaged from both the rotating members.
In order to transmit torque in either of normal or reverse direction when the torque transmission member is engaged with both the input system rotating member and the output system rotating member, in detail, the first dog is employed at the inner end of the output system rotating member rotatably supported at a stationary member, and simultaneously the second dog which is able to be engaged with the first dog in the circumferential direction thereof is secured at a torque transmission member, thereby constituting a kind of dog clutch. The torque transmission member is fixed in the rotating direction with respect to the input system rotating member, and the same is caused to axially move between an disengageable position where the first dog and the second dog are axially separated from each other and an engageable position where the second dog is engaged with the first dog in the circumferential direction.
A cam mechanism is also provided, which is able to control the above engagement and disengagement of the torque transmission member through relatively angular displacement with respect to the input system rotating member.
The cam mechanism is composed of a first cam member coaxially fitted to the input system rotating member so as to be relativel
REFERENCES:
patent: 4213521 (1980-07-01), Modersohn
patent: 5085305 (1992-02-01), Cheng
patent: 5699889 (1997-12-01), Gadd
Kawai Masahiro
Sato Koji
Yasui Makoto
Marmor Charles A
NTN Corporation
Rodriguez Saul
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