US 6,409,000 B1Granted

Two-way clutch and rotation transmission device

AssigneeNtn Corporation

InventorsKenichiro Itoh, Isao Hori

Life of this patent

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Abstract

A two-way clutch is provided which comprises an inner member formed with a plurality of pockets opening toward its outer peripheral surface, an outer member mounted on the inner member and formed with a plurality of pockets opening toward its inner peripheral surface, a cam ring formed with a cam surface on its inner peripheral surface, a plurality of block members received in the pockets of the inner member so as to protrude in a diametric direction, a plurality of resilient members received in the pockets of the inner member for biasing the block members radially outwardly, and a switch spring mounted to the inner member for maintaining a predetermined phase of the cam ring relative to the inner ring. With this construction, the inner and outer members can be engaged through the block members to transmit power by aligning the pockets of the inner and outer members with each other and by controlling the phase of the cam ring. Also, a rotation transmission device is provided which includes a first rotary member, a second rotary member, the above-described two-way clutch, and an electromagnetic clutch.

Claims66

Dependent claims

A two-way clutch comprising:

a first rotary member having a first annular surface with first pockets therein;
a second rotary member that is rotatable relative to said first rotary member, said second rotary member having a second annular surface with second pockets therein, with said second annular surface opposing said first annular surface;
block members, each of said block members received within a corresponding said first pocket;
resilient members, each of said resilient members received within a corresponding said first pocket to bias a corresponding said block member in a direction from said first annular surface toward said second annular surface and into a corresponding said second pocket;
and
a cam ring having a third annular surface with cam lobes extending therefrom, said third annular surface opposing said first annular surface with said cam lobes being equal in number to that of said block members, said cam ring being rotatable relative to said first rotary member between a first position at which said cam lobes are aligned with said block members to force said block members out of corresponding said second pockets and into corresponding said first pockets against said resilient members, respectively, and a second position at which said cam lobes are not aligned with said block members to allow said resilient members to bias said block members to extend from corresponding said first pockets into corresponding said second pockets, respectively.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/585,618Filed 2 Jun 2000
Priority: JP 11-1567813 Jun 1999
Granted: 25 Jun 2002
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

B60K 17/26
Arrangement or mounting of transmissions in vehicles: characterised by arrangement, location, or type of freewheel device
B60K 23/08
Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for: for changing number of driven…
F16D 27/112
With axially movable clutching members: with flat friction surfaces, e.g. discs
F16D 41/04
Freewheels or freewheel clutches: combined with a clutch for locking the driving and driven members