E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 7/06 (2006.01) E21B 44/00 (2006.01) G05D 3/00 (2006.01)
Patent
CA 2106754
The present invention relates to a positioning device capable of positioning a member in any direction with a high degree of resolution by using a hollow type harmonic drive mechanism, and to a drilling-direction control device for a drilling system utilizing the positioning device. The device of the present invention is mainly constituted by a double eccentric mechanism section (10). A first annular member (12) is rotatably supported by a circular inner circumferential surface (11a) of the cylindrical member (11) of this mechanism section, and a second annular member (13) is rotatably supported by a circular inner circumferential surface (11b) of the first annular member. Further, the circular inner circumferential surface (12b) of the first annular member is formed in a position deviated by a distance "e" relative to the center of the cylindrical member, and the circular inner circumferential surface (13b) of the second annular member is also formed in a position deviated by the distance "e" relative to the center of the circular inner circumferential surface of the first annular member. It is possible to move the center (C) of the circular inner circumferential surface (13b) of the second annular member in any direction within a range of a predetermined radius by relatively rotating these first and second annular members by using hollow type harmonic drive mechanisms (8, 9).
Ikeda Akio
Kiyosawa Yoshihide
Misawa Toshiaki
Sakata Jun
Harmonic Drive Systems Inc.
Japan Oil Gas And Metals National Corporation
Norton Rose Canada S.e.n.c.r.l.,s.r.l./llp
Sumitomo Metal Industries Ltd.
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