Drive apparatus and robot device
AssigneeNikon Corporation
InventorsKenji OMATA, Takashi NAGASE
Life of this patent
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Abstract
A drive apparatus includes a motor having a drive part that rotates a first shaft member; a transmission part that transmits rotation of the first shaft member to a second shaft member which is different from the first shaft member; a first detection device provided at the first shaft member to detect information regarding rotation of the drive part; a second detection device provided at the second shaft member to detect information regarding rotation of the transmission part; and a prevention part that prevents movement of foreign substance toward a detection part which includes at least one of the first detection device and the second detection device.
Claims13
A drive apparatus comprising:
- a first shaft member having a hallow portion;
- a second shaft member in which a part thereof is inserted into the hollow portion of the first shaft member;
- a transmission part that is connected to the first shaft member and the second shaft member and that transmits rotation of the first shaft member to the second shaft member;
- a first detector that has a first scale fixed at one end portion of the first shaft member and that detects information regarding rotation of the first scale;
- a second detector that has a second scale fixed at one end portion of the second shaft member and that detects information regarding rotation of the second scale;
- and
- a shield that is disposed at another end of the first shaft member and that covers the hollow portion of the first shaft member by contacting the second shaft member.
Dependencies are inferred from the claim text.