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US 11,448,942 B2Granted
Rotational mechanism and apparatus including the same
AssigneeCanon Kabushiki Kaisha
InventorsTakeaki Yokoi, Tomonori Nakazawa, Jun Kawata
Life of this patent
Estimating the term…
Abstract
A rotational mechanism includes a frame, a plurality of rotational units, an inner ring rotatably supported on the frame via the plurality of rotational units, and a rotation driving unit configured to generate power for rotating the inner ring. The inner ring is provided with a protrusion portion on an outer periphery. Each of the plurality of rotational units includes two bearings and a first pressing unit. The first pressing unit is configured to apply pressing forces to the two bearings in opposite directions in a rotational axis direction of the inner race. The protrusion portion is held between the two bearings due to the pressing forces.
Claims15
A rotational mechanism comprising:
- a frame;
- a plurality of rotational units;
- an inner ring rotatably supported on the frame via the plurality of rotational units;
- and
- a rotation driving unit configured to generate power for rotating the inner ring,
- wherein the inner ring is provided with a protrusion portion on an outer periphery,
- wherein each of the plurality of rotational units includes a first bearing, a second bearing, a first pressing unit, the first pressing unit being configured to apply pressing forces to the first bearing and the second bearing in an opposite direction to a rotational axis direction of the inner ring, and an adjustment unit between a first surface which is on a second bearing side of the first bearing and a second surface which is on a first bearing side of the second bearing,
- wherein the protrusion portion is held between the first surface and the second surface for each of the plurality of rotational units due to the pressing forces, and
- wherein a length of the adjustment unit in the rotational axis direction is shorter than a length of the protrusion portion in the rotational axis direction between the first surface and the second surface.
6 more elements
A rotational mechanism comprising:
- a frame;
- a plurality of first rotational units;
- a plurality of second rotational units;
- an inner ring rotatably supported on the frame via the plurality of the first rotational units and the plurality of the second rotational unit;
- a rotation driving unit configured to generate power for rotating the inner ring;
- and
- a first pressing unit configured to apply a pressing force in a rotational axis direction of the inner ring,
- wherein the inner race is provided with a protrusion portion on an outer periphery,
- wherein each of the plurality of the first rotational units includes one bearing,
- wherein each of the plurality of the second rotational units includes one bearing, and
- wherein the rotational mechanism comprises a plurality of configurations in each of which the protrusion portion is held in the rotational axis direction by a first bearing, to which a pressing force in the rotational axis direction is applied, of a first rotational unit among the plurality of the first rotational units and a second bearing, to which a reaction force in reaction to the pressing force is applied, of a second rotational unit among the plurality of the second rotational units which is disposed adjacent to the first rotational unit.
8 more elements
A camera platform system comprising:
- a camera stand on which an imaging device is mountable;
- a rotational mechanism configured to allow the camera stand to rotate, the rotational mechanism comprising:
- a frame;
- a plurality of rotational units;
- an inner ring rotatably supported on the frame via the plurality of rotational units;
- and
- a rotation driving unit configured to generate power for rotating the inner ring,
- wherein the inner ring is provided with a protrusion portion on an outer periphery,
- wherein each of the plurality of rotational units includes a first bearing, a second bearing, a first pressing unit, the first pressing unit being configured to apply pressing forces to the first bearing and the second bearing in an opposite direction to a rotational axis direction of the inner ring, and an adjustment unit between a first surface on a second bearing side of the first bearing and a second surface on a first bearing side of the second bearing,
- wherein the protrusion portion is held between the first surface of the first bearing and the second surface of the second bearing for each of the plurality of rotational units due to the pressing forces,
- wherein a length of the adjustment unit in the rotational axis direction is shorter than a length of the protrusion portion in the rotational axis direction between the first surface and the second surface, and
- wherein a camera platform to which the rotational mechanism is connected and which is configured to rotate the camera stand around an axis in a first direction perpendicular to a rotational axis of the rotational mechanism and around an axis in a second direction perpendicular to the rotational axis and the first direction.
9 more elements
A camera platform system comprising:
- a camera stand on which an imaging device is mountable;
- a rotational mechanism configured to allow the camera stand to rotate, the rotational mechanism comprising:
- a frame;
- a plurality of rotational units;
- an inner ring rotatably supported on the frame via the plurality of rotational units;
- a rotation driving unit configured to generate power for rotating the inner ring;
- and
- a first pressing unit configured to apply a pressing force in a rotational axis direction of the inner ring,
- wherein the inner race is provided with a protrusion portion on an outer periphery,
- wherein each of the plurality of rotational units includes one bearing,
- wherein the protrusion portion is held between a first bearing of a first rotational unit to which the pressing force is applied and a second bearing of a second rotational unit to which a reaction force is applied and disposed adjacent to the first rotational unit due to the pressing force and the reaction force in reaction to the pressing force, and
- wherein a camera platform to which the rotational mechanism is connected and which is configured to rotate the camera stand around an axis in a first direction perpendicular to a rotational axis of the rotational mechanism and around an axis in a second direction perpendicular to the rotational axis and the first direction.
9 more elements
Dependencies are inferred from the claim text.