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TECHNICAL PAPERS

Evaluation and Comparison of Alternative Compliant Overrunning Clutch Designs

[+] Author and Article Information
Gregory M. Roach, Larry L. Howell

Mechanical Engineering Dept., Brigham Young University, Provo, UT 84602

J. Mech. Des 124(3), 485-491 (Aug 06, 2002) (7 pages) doi:10.1115/1.1480414 History: Received October 01, 1999; Online August 06, 2002
Copyright © 2002 by ASME
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References

Figures

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Example over-running clutch types: spring clutch, roller or ball clutch, sprag clutch, and ratchet and pawl clutch
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A rigid-body ratchet and pawl clutch with three pawls, pin joints, and leaf springs
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A compliant ratchet and pawl clutch. The pawls are loaded in bending in the torque output direction.
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The pseudo-rigid-body model of the cantilever beam
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The cantilever beam with dimensional parameters
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A compliant ratchet and pawl clutch with the pawls loaded in bending. The post serves to increase the stiffness of the beam in the torque output direction by decreasing the effective length of the cantilever beam.
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A compliant ratchet and pawl clutch with the pawls loaded in tension by the ratchet teeth
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A compliant ratchet and pawl over-running clutch with small-length flexural pivots
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The PRBM of the small-length flexural pivot superimposed on the clutch pawl
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The dimensional parameters for the small-length flexural pivot and pawl
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A compliant ratchet and pawl clutch with the pawls loaded in compression
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A compliant compression-loaded ratchet and pawl clutch (CCrat-pawl)
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Model of the initially curved beam and pawl

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