Drive apparatus
AssigneeDenso Corporation
InventorHiroki Tomizawa
Life of this patent
Estimating the term…
Abstract
An electric motor includes: a stator; windings wound around the stator; a rotor configured to rotate relative to the stator; a shaft; and a motor case. The shaft is configured to rotate integrally with the rotor, and one end portion of the shaft is coupled to a speed reducing gear device. The motor case includes a tubular portion and a bottom portion, and an opposite side of the tubular portion, which is opposite to the bottom portion, opens. A large diameter portion is formed at an outer periphery of the bottom portion of the motor case and has an outer diameter, which is larger than an outer diameter of a stator fixation location of the motor case, to which the stator is fixed, while the large diameter portion is formed continuously with a contact surface of the bottom portion that is configured to contact a gear housing.
Claims13
A drive apparatus configured to transmit rotation of an electric motor to an external device, comprising:
- a stator;
- a winding that is wound around the stator;
- a rotor that is configured to rotate relative to the stator;
- a shaft that is configured to rotate integrally with the rotor, wherein one end portion of the shaft is configured to be coupled with the external device;
- and
- a motor case that includes a tubular portion and a bottom portion to have a bottomed tubular form, which opens at a side that is opposite to the bottom portion, while the stator is fixed to the tubular portion, and the motor case is configured to be installed to a housing of the external device through the bottom portion, wherein:
- a large diameter portion is formed at an outer periphery of the bottom portion of the motor case and has an outer diameter, which is larger than an outer diameter of a stator fixation location of the motor case, to which the stator is fixed, while the large diameter portion is formed continuously with a contact surface of the bottom portion that is configured to contact the housing of the external device;
- the motor case includes a flange portion, wherein the flange portion radially outwardly projects from the tubular portion and is configured to be fixed to the housing of the external device with a fastener;
- and
- the large diameter portion is formed continuously with the flange portion.
Dependencies are inferred from the claim text.