초록 ▼

A concentric-double-shaft simultaneously rotating apparatus in which a part of the force for driving an inner shaft to rotate is obtained by a device other than a rotation controlled motor to thereby reduce the capacity of the rotation controlled motor to attain reduction in size of the apparatus, i

A concentric-double-shaft simultaneously rotating apparatus in which a part of the force for driving an inner shaft to rotate is obtained by a device other than a rotation controlled motor to thereby reduce the capacity of the rotation controlled motor to attain reduction in size of the apparatus, increase of stiffness, and so on. The concentric-double-shaft simultaneously rotating apparatus includes at least one permanent magnet which is attached onto an inner circumferential surface of an outer shaft, and a secondary conductor such as a copper pipe, or the like, is provided on an outer circumferential surface of the inner shaft to create an induced current flow.

대표청구항 ▼

[ What is claimed is:] [1.] A concentric-double-shaft simultaneously rotating apparatus, comprising:an outer shaft driven to rotate by a belt wound on an outer circumferential surface of said outer shaft, said outer shaft having a hollow cylindrical shape;rotation controlling means for controlling a

[ What is claimed is:] [1.] A concentric-double-shaft simultaneously rotating apparatus, comprising:an outer shaft driven to rotate by a belt wound on an outer circumferential surface of said outer shaft, said outer shaft having a hollow cylindrical shape;rotation controlling means for controlling a rotation controlled motor;an inner shaft including a first end portion coaxially attached to a rotor of said rotation controlled motor and a second end portion inserted into said outer shaft so that said inner shaft is concentrically supported in said outer shaft, wherein the number of rotations of said inner shaft is controlled by said rotation controlled motor so that a difference between the number of rotations of said inner shaft and the number of rotations of said outer shaft corresponds to a predetermined number of rotations;a permanent magnet member attached on an inner circumferential surface of said outer shaft; anda secondary conductor provided on an outer circumferential surface of said inner shaft.