PULLEY DEVICE WITH EMBEDDED UNIDIRECTIONAL CLUTCH

Title:

PULLEY DEVICE WITH EMBEDDED UNIDIRECTIONAL CLUTCH

Document Type and Number:

WIPO Patent Application WO/2015/012053

Kind Code:

A1

Abstract:

The present invention addresses the problem of implementing a pulley device with an embedded unidirectional clutch, with which the influence of auxiliary automobile machinery on a rotary shaft due to fluctuations in the rotation of the engine can be sufficiently reduced. A sleeve (1b) is configured from an inner-diameter-side sleeve (24) and an outer-diameter-side sleeve (25), a unidirectional clutch (3) is provided between the outer-diameter-side sleeve (25) and a pulley (2), and a coiled torsion spring (18a) capable of transmitting torque between the inner-diameter-side sleeve (24) and the outer-diameter-side sleeve (25) is provided between these components. When the rotational speed of the pulley (2) becomes slower than the rotational speed of the outer-diameter-side sleeve (25), the inner-diameter-side sleeve (24) and the outer-diameter-side sleeve (25) rotate relative to one another due to the elastic force of the coiled torsion spring (18a), until the elastic force of the coiled torsion spring (18a) is released, after which the unidirectional clutch (3) becomes incapable of transmitting torque between the pulley (2) and the outer-diameter-side sleeve (25).

Inventors:

MORI HIROFUMI (JP)

Application Number:

PCT/JP2014/066794

Publication Date:

January 29, 2015

Filing Date:

June 25, 2014

Export Citation:

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Assignee:

NSK LTD (JP)

International Classes:

F16H55/36; F16D41/02; F16D41/06; F16D41/07; F16D47/04; F16F15/123

Domestic Patent References:

WO2009031569A1	2009-03-12
WO2006001337A1	2006-01-05

Foreign References:

JP2005163932A	2005-06-23
JP2010019313A	2010-01-28
JP2009063040A	2009-03-26

Other References: