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US 12,119,713 B2Granted
Rotor and rotor manufacturing method
AssigneeAisin Corporation
InventorShinya Osuka
Life of this patent
Estimating the term…
Abstract
A first shaft member of a shaft included in this rotor includes: a first large-diameter portion disposed radially inward of a rotor core; and a first small-diameter portion disposed on a first axial side relative to the rotor core. The first small-diameter portion is provided with a driving force transmitter to transmit a driving force, which is transmitted thereto from the rotor core, to a driving force transmission member. A portion of the first shaft member located on a second axial side is connected to a second shaft member of the shaft.
Claims13
A rotor comprising:
- a cylindrical rotor core including a first end face located on a first axial side and a second end face located on a second axial side;
- and
- a shaft that rotates together with the rotor core, wherein
- the shaft includes
- a first shaft member integrally including a first large-diameter portion having a hollow shape and disposed radially inward of the rotor core, and a first small-diameter portion disposed on the first axial side relative to the first end face of the rotor core and continuous with the first large-diameter portion, and
- a second shaft member including a second small-diameter portion disposed on the second axial side relative to the second end face of the rotor core,
- at least a part of the first small-diameter portion of the first shaft member and at least a part of the second small-diameter portion of the second shaft member each have an outside diameter smaller than an inside diameter of the rotor core,
- the first large-diameter portion of the first shaft member includes a driving force transmission outer peripheral surface which is in abutment with an inner peripheral surface of the rotor core and to which a driving force is to be transmitted from the rotor core,
- the first small-diameter portion of the first shaft member is provided with a driving force transmitter to transmit the driving force, which is transmitted thereto from the rotor core through the driving force transmission outer peripheral surface, to a driving force transmission member,
- a portion of the first shaft member located on the second axial side is provided with a connection connected to the second shaft member,
- the connection is located on the second axial side relative to an end of the driving force transmission outer peripheral surface located on the second axial side,
- the second shaft member includes a second large-diameter portion disposed on the first axial side relative to the second small-diameter portion and continuous with the second small-diameter portion, and
- the connection is located on the second large-diameter portion on the second axial side of end plates of the rotor core.
10 more elements
A rotor manufacturing method comprising:
- a first shaft member preparing step involving preparing a first shaft member of a shaft that rotates together with a rotor core, the first shaft member integrally including
- a first large-diameter portion having a hollow shape and disposed radially inward of the rotor core having a cylindrical shape, and
- a first small-diameter portion disposed on a first axial side relative to a first end face of the rotor core located on the first axial side, the first small-diameter portion being continuous with the first large-diameter portion, at least a part of the first small-diameter portion having an outside diameter smaller than an inside diameter of the rotor core;
- a second shaft member preparing step involving preparing a second shaft member of the shaft, the second shaft member including a second small-diameter portion disposed on a second axial side relative to a second end face of the rotor core located on the second axial side, at least a part of the second small-diameter portion having an outside diameter smaller than the inside diameter of the rotor core;
- a driving force transmitter providing step involving providing a driving force transmitter on the first small-diameter portion of the first shaft member, the driving force transmitter being configured to transmit a driving force to a driving force transmission member, the driving force being transmitted to the driving force transmitter from the rotor core through a driving force transmission outer peripheral surface of the first large-diameter portion in abutment with an inner peripheral surface of the rotor core;
- a connecting step involving connecting the second shaft member to a portion of the first shaft member located on the second axial side by welding at a position located on the second axial side relative to an end of the driving force transmission outer peripheral surface of the first large-diameter portion located on the second axial side;
- and
- a securing step involving securing the shaft to the rotor core, wherein:
- the second shaft member includes a second large-diameter portion disposed on the first axial side relative to the second small-diameter portion and continuous with the second small-diameter portion, and
- the welding is located on the second large-diameter portion on the second axial side of end plates of the rotor core.
7 more elements
Dependencies are inferred from the claim text.