Clutch designed as roller free-wheel for transmitting a torque a

Details Clutch designed as roller free-wheel for transmitting a torque a Clutch designed as roller free-wheel for transmitting a torque a

1994-04-13

1995-10-24

Bonck, Rodney H.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

297374, F16D 1500, G06G 516

Patent

active

054602530

DESCRIPTION:

BRIEF SUMMARY
The invention relates to a clutch designed as roller free-wheel for transmitting a torque acting in both directions of rotation between two structural elements, having an outer ring which at its inner wall face is provided with ramp type jamming tracks formed by recesses, the jamming tracks extending, starting from a zone of greatest radial extent of the recesses, in pairs symmetrically curved or flat up to a zone of least radial extent; having an inner element with a cylindrical jamming track at its outer wall face; having jamming rollers which are arranged in pairs extending between the jamming tracks of the outer ring and the inner element parallel to the longitudinal center axis thereof, and between which a compression spring provides for initial tension of the two jamming rollers in the direction of the ramp type end of the jamming track; and having a release system by which the jamming elements are shiftable into the zone of the recesses of greatest radial extent.
A clutch designed as a roller free-wheel of the aforesaid kind is known from WO-A-83/03 082. The respective clutch is intended for a steering wheel lock of a motor vehicle, the jamming rollers being arranged between a cylindrical jamming track of the steering column and a fixed housing provided with recesses. Each jamming roller of a jamming roller pair associated with the recess is guided in a cage, these cages, which have a scissor type actuating system, being moved toward each other at an identical pivot angle to disengage the clutch. Thereby both cages shift their jamming rollers into the zone of the recess of greatest radial extent. In this position of the cages, the steering column can be rotated relative to the housing. If, however, no displacement takes place at the scisser type actuating elements of the cages, the respective compression springs move the jamming rollers in the direction of the ramp type end of the jamming track of the housing, so that the steering column is locked relative to the housing. The disadvantages of the known system consist in that the clutch is of complex design, as a separate jamming roller free-wheel with cage and release system is provided for each of the two directions of rotation. The steering column, as has been set forth before, is to be lockable relative to the fixed housing in each of its positions by means of the clutch, the release system being associated with the fixed housing. If, for a different purpose of use, the inner shaft was to be made fixed and the outer element rotatable, it would be necessary to actuate the scissor type release system before each pivoting. This results in a more complex operation.
It is, therefore, the object of the invention to avoid these disadvantages and consequently to permit a revolving motion of the outer ring with the clutch disengaged, while reducing the complexity of operation required therefor and making the clutch compact and easy to manufacture.
The clutch of the invention is designed as roller free-wheel for transmitting a torque acting in both directions of rotation between two structural elements (24, 25), having an outer ring (1) which at an inner wall face (2) thereof is provided with ramp type jamming tracks (4,5) produced by recesses (3), the jamming tracks (4,5) extending, starting from a zone of greatest radial extent of the recess (3), in pairs, symmetrically curved or flat, up to a zone of at least radial extent; having an inner element (9) with a cylindrical jamming track (10) at an outer wall face thereof; having jamming rollers (6,7) which are arranged in pairs, extending between the jamming tracks (4,5,10) of outer ring (1) and inner element (9) parallel to the longitudinal center axis thereof and between the jamming rollers (6,7) of each pair, a compression spring (8) is disposed for initial tension of the two jamming rollers (6,7) in the direction of the ramp type ends of the jamming tracks (4,5); and having a release system (11) by which the jamming rollers (6,7) are shiftable into the zone of the recess (3) of greatest radial extent,

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patent: 4901831 (1990-02-01), Kenichiro Ito et al.

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