Actuator for steering system

An actuator for a steering system, comprising:

• a steering shaft configured to rotate with rotation of a steering wheel;
• a transmission mechanism configured to transmit rotation of the steering shaft to a steered wheel;
• a piston disposed in the transmission mechanism;
• and
• a pair of pressure chambers configured to generate a force acting to move the piston, the actuator for a steering system being disposed between a hydraulic power steering system which imparts a steering force to the steered wheel along with the movement of the piston, and the steering wheel,
• the actuator for a steering system, further including:
• a housing;
• an input shaft which is rotatably and axially supported by the housing and disposed in a steering wheel side of the housing;
• an output shaft which is rotatably and axially supported by the housing and disposed in the hydraulic power steering system side of the housing;
• a torsion bar that connects the input shaft and the output shaft;
• a motor rotor disposed around an outer periphery of the output shaft within the housing and configured to rotate integrally with the output shaft;
• a motor stator disposed around an outer periphery of the motor rotor within the housing;
• a rotation angle detecting section disposed within the housing and configured to detect rotation angles of the input and output shafts or a relative angle of the input and output shafts;
• a signal output section, the signal output section being disposed in the housing and configured to output a signal detected by the rotation angle detecting section to the outside of the housing;
• and
• a memory section disposed within the housing and configured to store a correction value for correcting the signal detected by the rotation angle detecting section, wherein
• the signal output section is configured to output the detected signal which is corrected according to the correction value stored in the memory section.

An actuator for a steering system, comprising:

• a steering shaft configured to rotate with rotation of a steering wheel;
• a transmission mechanism configured to transmit rotation of the steering shaft to a steered wheel;
• a piston disposed in the transmission mechanism;
• and
• a pair of pressure chambers configured to generate a force acting to move the piston, the actuator for a steering system being disposed between a hydraulic power steering system which imparts a steering force to the steered wheel along with the movement of the piston, and the steering wheel,
• the actuator for a steering system, further including:
• a housing;
• an input shaft which is rotatably and axially supported by the housing and disposed in a steering wheel side of the housing;
• an output shaft which is rotatably and axially supported by the housing and disposed in the hydraulic power steering system side of the housing;
• a torsion bar that connects the input shaft and the output shaft;
• a motor rotor disposed around an outer periphery of the output shaft within the housing and configured to rotate integrally with the output shaft;
• a motor stator disposed around an outer periphery of the motor rotor within the housing;
• a rotation angle detecting section disposed within the housing and configured to detect rotation angles of the input and output shafts or a relative angle of the input and output shafts,
• wherein
• the output shaft includes a serrated portion connected to a rotary shaft member of the hydraulic power steering system.

An actuator for a steering system, comprising:

• a steering shaft configured to rotate with rotation of a steering wheel;
• a transmission mechanism configured to transmit rotation of the steering shaft to a steered wheel;
• a piston disposed in the transmission mechanism;
• and
• a pair of pressure chambers configured to generate a force acting to move the piston, the actuator for a steering system being disposed between a hydraulic power steering system which imparts a steering force to the steered wheel along with the movement of the piston, and the steering wheel,
• the actuator for a steering system, further including:
• a housing;
• an input shaft which is rotatably and axially supported by the housing and disposed in a steering wheel side of the housing;
• an output shaft which is rotatably and axially supported by the housing and disposed in the hydraulic power steering system side of the housing;
• a torsion bar that connects the input shaft and the output shaft;
• a motor rotor disposed around an outer periphery of the output shaft within the housing and configured to rotate integrally with the output shaft;
• a motor stator disposed around an outer periphery of the motor rotor within the housing;
• a rotation angle detecting section disposed within the housing and configured to detect rotation angles of the input and output shafts or a relative angle of the input and output shafts;
• and
• an elastic support member disposed between the housing and the hydraulic power steering system, the elastic support member being configured to elastically support the housing with respect to the hydraulic power steering system.

An actuator for a steering system, comprising:

• a steering shaft configured to rotate with rotation of a steering wheel;
• a transmission mechanism configured to transmit rotation of the steering shaft to a steered wheel;
• a piston disposed in the transmission mechanism;
• and
• a pair of pressure chambers configured to generate a force acting to move the piston, the actuator for a steering system being disposed between a hydraulic power steering system which imparts a steering force to the steered wheel along with the movement of the piston, and the steering wheel,
• the actuator for a steering system, further including:
• a housing;
• an input shaft which is rotatably and axially supported by the housing and disposed in a steering wheel side of the housing;
• an output shaft which is rotatably and axially supported by the housing and disposed in the hydraulic power steering system side of the housing;
• a torsion bar that connects the input shaft and the output shaft;
• a motor rotor disposed around an outer periphery of the output shaft within the housing and configured to rotate integrally with the output shaft;
• a motor stator disposed around an outer periphery of the motor rotor within the housing;
• a rotation angle detecting section disposed within the housing and configured to detect rotation angles of the input and output shafts or a relative angle of the input and output shafts;
• and
• a universal joint portion disposed between the output shaft and the rotary shaft member of the hydraulic power steering system.