Patent ID: 7339158
Filing Date: 2008-03-04
Classification: G01D,Y10T

Abstract:
1. A rotary encoder having a pickup shaft ( 14 ) that can be slid coaxially onto a drive shaft ( 12 ) that is to be measured and clamped on the drive shaft ( 12 ) by means of a collet chuck apparatus, characterized in that the pickup shaft ( 14 ) is constructed as an axially continuous hollow shaft through which the drive shaft ( 12 ) is coaxially insertable; the collet chuck apparatus has two collet chucks ( 26 , 28 ) that each clamp the pickup shaft ( 14 ) on the drive shaft ( 12 ) with clamping jaws ( 34 , 38 ) on the opposing ends of the pickup shaft; the one collet chuck penetrates the pickup shaft ( 14 ) coaxially as a clamping sleeve ( 26 ); and a force element ( 40 , 48 ) exerts an axial force on the two collet chucks ( 26 , 28 ), whereby the collet chucks ( 26 , 28 ) are movable against each other and against the pickup shaft ( 14 ) in order to produce the clamping force of their respective clamping jaws ( 34 , 38 ).