Patent ID: 7794350
Filing Date: 2010-09-14
Classification: F16H,G01R,H02K

Abstract:
1. A turning device for a heavy object comprising: a turning arm joined to the heavy object, said turning arm being turnable around an axial line of a turning pivot of the turning arm, said heavy object having a width extended along the axial line of the turning pivot; and a drive device for driving a turning operation of the turning arm, the drive device including a planetary gear type reducer comprising a fixing section, a rotation input section, and a rotation output section having a plane orthogonal to the axial line of the turning pivot, said planetary gear type reducer including a pair of ball bearings each having bearing contact angle to a line perpendicular to the axial line, said ball bearings being disposed between the fixing section and the rotation output section; and a motor including a rotor shaft coaxially connected to a stator having a coil and to the rotation input section, the turning arm having a first plane connected to the plane of the rotation output section and a second plane connected to the heavy object, said second plane being positioned nearer to the heavy object than the axial line of the turning pivot and oriented orthogonal to the first plane, and the turning arm and the drive device being disposed entirely within said width of the heavy object.