Blower
AssigneeDaikin Industries, Ltd.
InventorsHirotaka Tomioka, Yuuki Kirikuri
Life of this patent
Estimating the term…
Abstract
A fan includes: a shaft including an outer peripheral surface that includes a first circular-arc portion, and a first flat portion; and a boss portion including a fitting hole with an inner peripheral surface that includes a second circular-arc portion, and a second flat portion. The second circular-arc portion corresponds to the first circular-arc portion. The second flat portion corresponds to the first flat portion. One or both of the first flat portion and the second flat portion includes a notch in an end portion in a width direction of the one or both of the first flat portion and the second flat portion.
Claims6
A fan, comprising:
- a shaft comprising an outer peripheral surface that comprises:
- a first circular-arc portion;
- and
- a first flat portion;
- and
- a boss portion comprising a fitting hole with an inner peripheral surface that comprises:
- a second circular-arc portion;
- and
- a second flat portion, wherein
- the second circular-arc portion corresponds to the first circular-arc portion,
- the second flat portion corresponds to the first flat portion,
- the second flat portion comprises a notch in an end portion in a width direction of the second flat portion,
- the notch of the second flat portion comprises a notch surface that forms a pressure receiving surface where the notch of the second flat portion is in surface contact with the first flat portion when the shaft rotates, and
- when viewed in an axial direction of the shaft, a length of a portion where the notch of the second flat portion and the first flat portion contact each other during rotation of the shaft is longer than a distance between the first flat portion and the second flat portion when the shaft stops.
A fan, comprising:
- a shaft comprising an outer peripheral surface that comprises:
- a first circular-arc portion;
- and
- a first flat portion;
- and
- a boss portion comprising a fitting hole with an inner peripheral surface that comprises:
- a second circular-arc portion;
- and
- a second flat portion, wherein
- the second circular-arc portion corresponds to the first circular-arc portion,
- the second flat portion corresponds to the first flat portion,
- one or both of the first flat portion and the second flat portion comprises a notch in an end portion in a width direction of the one or both of the first flat portion and the second flat portion,
- the notch comprises a flat notch surface that forms a pressure receiving surface where the shaft and the boss portion are in contact when the shaft rotates, and
- the pressure receiving surface and the first or second flat portion facing the pressure receiving surface come into contact with each other and form a flat contact area.
A fan, comprising:
- a shaft comprising an outer peripheral surface that comprises:
- a first circular-arc portion;
- and
- a first flat portion;
- and
- a boss portion comprising a fitting hole with an inner peripheral surface that comprises:
- a second circular-arc portion;
- and
- a second flat portion, wherein
- the second circular-arc portion corresponds to the first circular-arc portion,
- the second flat portion corresponds to the first flat portion, and
- the first flat portion comprises a notch in an end portion at an end in a width direction of the first flat portion.
Dependencies are inferred from the claim text.