Rotational driving apparatus with frictional engagement and robot using the same
AssigneeCanon Kabushiki Kaisha
InventorsYusaku Azuma, Takeo Tanita, Toshihiro Yamamoto, Shozo Kasai, Masateru Yasuhara, Yasuhiro Sawada
Life of this patent
Estimating the term…
Abstract
A rotational driving apparatus with frictional engagement includes a base, a rotating member having rigidity and axially supported on the base, at least one frictional roller having rigidity and at least one driving roller which are in rolling contact with the rotating member, a motor for rotating the driving roller, and a pressing mechanism for pressing the frictional and driving rollers against the rotating member, thereby transmitting a driving force of the driving roller to the rotating member to rotate it.
Claims9
A rotational driving apparatus for rotating a shaft which includes one end portion connected to a base and the other end portion connected to a load section, comprising:
- a rotating member, having an axis, connectable to the rotating shaft and being rotatably supported on the base;
- driving means for supplying a driving force to said rotating member, said driving means including a driving source, a driving roller being in rolling contact with said rotating member and transmitting the driving force from said driving source to said rotating member, and a driving housing for rotatably supporting said driving roller;
- pressing means for pressing said driving roller and said rotating member against each other, said pressing means including at least one pressing roller being in rolling contact with said rotating member, a pressing member for supplying a pressing force to said pressing roller, and a pressing housing for rotatably supporting said pressing roller, with said driving housing and pressing housing being symmetrically arranged with respect to said rotating member such that the axis of said rotating member is centrally positioned between said driving and pressing rollers;
- and
- fixing means for spatially adjusting the driving housing and pressing housing with each other, said fixing means including a connecting member for firmly connecting said driving housing and pressing housing on the base, with said connecting member defining set positions of said driving housing and pressing housing on the base so as to maintain the pressing condition of said driving and pressing roller against said rotating member.
A rotational driving apparatus comprising:
- a base;
- a rotating member rotatable on said base;
- driving means for supplying a driving force to said rotating member, said driving means including a driving source, a driving roller being in rolling contact with said rotating member and transmitting the driving force from said driving source to said rotating member, and a driving housing for rotatably supporting said driving roller, with said driving housing being slidable with respect to said base;
- pressing means for pressing said driving roller and said rotating member against each other, said pressing means including at least one pressing roller being in rolling contact with said rotating member and a pressing member for supplying a pressing force to said pressing roller, and a pressing housing for rotatably supporting said pressing roller, with said pressing housing being slidable with respect to said base, wherein said driving housing and said pressing housing are symmetrically arranged with respect to said rotating member such that a rotating axis of said rotating member is centrally disposed between said driving and pressing rollers;
- and
- a connecting member for maintaining a constant distance between said driving housing and said pressing housing.
Dependencies are inferred from the claim text.