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Clutch With Torque Overload Control

IP.com Disclosure Number: IPCOM000096334D
Original Publication Date: 1963-Apr-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 69K

Publishing Venue

IBM

Related People

Young, RJ: AUTHOR

Abstract

Torque overload control is provided in this clutch mechanism. Driving forces are transmitted from drive shaft 1 and associated collar 2 through spring member 5 to driven arbor 3 and associated bevel gear 4 that are freely mounted on shaft 1. Collar 6 maintains a desired horizontal position of arbor 3 and gear 4 along shaft 1. Collar 2 has a split ring portion 2a for adjusting the amount of torque desired by means of screw 7. Spring 5 engages the split ring portion 2a on its inner surface 2b. Spring 5 has a first section with coils 5a of a particular cross-sectional area and a second section with coil 5b of a reduced cross-sectional area. In operation, collar 2 and portion 2a, together with spring 5, are driven in a counter clockwise direction as indicated by arrow 8.

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Clutch With Torque Overload Control

Torque overload control is provided in this clutch mechanism. Driving forces are transmitted from drive shaft 1 and associated collar 2 through spring member 5 to driven arbor 3 and associated bevel gear 4 that are freely mounted on shaft 1. Collar 6 maintains a desired horizontal position of arbor 3 and gear 4 along shaft 1. Collar 2 has a split ring portion 2a for adjusting the amount of torque desired by means of screw 7. Spring 5 engages the split ring portion 2a on its inner surface 2b. Spring 5 has a first section with coils 5a of a particular cross-sectional area and a second section with coil 5b of a reduced cross- sectional area. In operation, collar 2 and portion 2a, together with spring 5, are driven in a counter clockwise direction as indicated by arrow 8. When it is desired to actuate the clutch, shoe member 9 is brought to bear against coils 5b which results in the engagement of spring 5 with arbor 3. The right-hand portion of spring 5 tends to wind up and exerts enough friction on arbor 3 to drive it. If an overload condition occurs during clutch engagement, the right-hand portion of spring 5 continues to be engaged with arbor 3, but continued driving of collar 2 causes the heavier left-hand portion of the spring to wind up. This results in a reduced frictional engagement of spring 5 with internal surface 2b of split ring portion 2a so that slippage occurs. The point at which slippage occurs is determined by adju...