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SCREWLESS COUPLING FOR LOW TORQUE DRIVE

IP.com Disclosure Number: IPCOM000008546D
Original Publication Date: 1998-Mar-01
Included in the Prior Art Database: 2002-Jun-21
Document File: 2 page(s) / 106K

Publishing Venue

Motorola

Related People

Soon Fook Daniel Lim: AUTHOR

Abstract

Most standard couplings use lock screws. They do not provide compensation for misalignment of shaft ends by virtue of angular, lateral, and longitu- dinal (axial) flexibility. Misalignment adds load to the drive and may cause premature damage to the low torque motor, This screwless coupling is able to compensate misalignment of shaft ends. It is useful in a space constraint environment where accommodating stan- dard coupling is not possible. It is designed to couple two pulleys without the need of lock screw, thus simplifies drive system development and reduces cost significantly.

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Page 1 of 2

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MOTOROLA Technical Developments

SCREWLESS COUPLING FOR LOW TORQUE DRIVE

by Soon Fook Daniel Lim

BACKGROUND

  Most standard couplings use lock screws. They do not provide compensation for misalignment of shaft ends by virtue of angular, lateral, and longitu- dinal (axial) flexibility. Misalignment adds load to the drive and may cause premature damage to the low torque motor,

  This screwless coupling is able to compensate misalignment of shaft ends. It is useful in a space constraint environment where accommodating stan- dard coupling is not possible. It is designed to couple two pulleys without the need of lock screw, thus simplifies drive system development and reduces

cost significantly.

COUPLING DESCRIPTION

  The cylindrical shaped coupling is machined out from a standard steel rod. A hole is bored through the coupling to tit loosely the motor shaft and the pivot shaft at the opposite end. The flat- blades at both ends of the coupling are for locking the pulleys. The flat-blade thickness should not be larger than the shaft diameter, and its length dimension not exceeding the pulley thickness. A dowel pin is press-fitted through the coupling shaft hole to lock the motor shaft loosely with minimum rotational movement.

51 March 1998

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MOTOROLA Technical Developments

SCREWLESS COUPLING m~muDlioe

engage ("rive) : dowel pin into pacy ' lNNER PULLEY

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