Electric power steering device
AssigneeNippondenso Co., Ltd.
InventorsKanji Takeuchi, Takeshi Sawada, Masao Abe, Masanori Kondo, Jirou Hayashi, Yuuji Hashiba
Life of this patent
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Abstract
An electric power steering device includes an output shaft connected to a steering mechanism of a steering system for power assisting the steering operation. The EPS includes a motor and a control circuit accommodated in a common motor housing. The motor housing comprises an end frame and a cup-shaped motor case hermetically covering the motor and the control circuit. The end frame is secured to a rack housing accommodating the steering mechanism, so that heat generated by the motor and the control circuit is transmitted to the rack housing.
Claims20
An electric power steering device for an automobile having a steering system including a steering mechanism accommodated in a rack housing, the electric power steering device comprising:
- an output shaft coupled to the steering mechanism;
- a motor which assists in applying torque to the steering mechanism via said output shaft;
- a control circuit which controls the motor;
- and
- a motor housing which accommodates the motor and the control circuit, the motor and the control circuit with the motor housing being arranged in thermal contact with the rack housing;
- wherein said motor housing comprises an end frame having the motor and the control circuit assembled thereonto, and a cup-shaped motor case covering the motor and the control circuit and hermetically coupled to the end frame, the end frame being fixed to the rack housing.
An electric power steering device for an automobile having a steering system including a steering mechanism accommodated in a rack housing, the electric power steering device comprising:
- an output shaft coupled to the steering mechanism;
- a motor which assists in applying torque to the steering mechanism via said output shaft;
- a control circuit which controls the motor;
- and
- a motor housing which accommodates the motor, the control circuit being attached to the motor housing in a side-by-side relationship with the motor, the motor and the control circuit with the motor housing being arranged in thermal contact with the rack housing.
Dependencies are inferred from the claim text.