Japanese Patent JPS6249499

B2

A play-free precision drive apparatus is disclosed which comprises a rotatable drive element (2, 20) for driving a driven element (8, 21), a biasing element (12, 26) for urging the driven element (8, 21) into engagement with the drive element (2, 20), and two rotatable support elements (11, 22) abutting the drive element (2, 20) along its periphery for holding the drive element (2, 20) against the driven element (8, 21). The support elements (11, 22) are positioned such that the centers of the support elements (11, 22) and the center of the drive element (2, 20) define an angle (A1, A21) of less than 180 DEG having its apex at the center of the drive element (2, 20) and such that the centers of the support elements (11, 22) define a line (L3, L23) parallel to a tangent to the drive element (2, 20) which passes through a contact point between the drive element (2, 20) and the driven element (8, 21). Although the drive element (2, 20) and the support elements (11, 22) are mounted on standard bearings which have play, the precision drive apparatus has substantially no play in the direction of drive.

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HORUMERU DANKUSHATSUTO

JP1818681A

October 20, 1987

February 12, 1981

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HEIDENHAIN GMBH DR JOHANNES

F16H13/04; F16H19/02

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