| 摘要 |
In a concentric double axis mechanism (I); a driving bevel gear ( 7 ) is placed concentrically with and freely from any interference with an axis-A ( 3 ), a follower bevel gear ( 8 ) is meshed with the driving bevel gear ( 7 ), and an axis-B ( 9 ) is concentrically connected and fixed to the follower bevel gear ( 8 ). Since the driving bevel gear ( 7 ) is driven by the axis-B actuator ( 12 ) that is independent from the axis-A actuator ( 11 ), the axis-B ( 9 ) can be driven being free from any interference with the axis-A ( 3 ). The axis-A actuator ( 11 ) does not become a load for the axis-B actuator ( 12 ), nor does the axis-B actuator ( 12 ) become a load for the axis-A actuator ( 11 ).
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