The present embodiments provide a steering apparatus for vehicle including a motor pulley coupled to the rotation shaft of the driving motor, a nut pulley coupled to the outer circumferential surface of the ball nut, a belt connecting the motor pulley and the nut pulley, a first groove provided on an outer peripheral surface of at least one of the motor pulley and the nut pulley, a second groove provided on an inner surface of the belt at a position opposite to the first groove, and a slip preventing member coupled to the first groove.

Methods and apparatus to determine rack force are disclosed. An example apparatus includes a rack to couple to a steering knuckle of a vehicle, a ball nut engaged with the rack, a first ring gear coupled to the ball nut, a first pinion fixed to a motor, the first pinion engaged with the first ring gear, the motor to rotate the ball nut to move the rack, a motor encoder to detect a rotation of the first pinion, a second ring gear coupled to the ball nut, and a sensor fixed to a second pinion, the second pinion engaged with the second ring gear, the second pinion to rotate as the second ring gear rotates, the sensor to detect a rotation of the second pinion, the rotation of the second pinion and the rotation of the first pinion corresponding to a force on the rack.

A steering gear for a steer-by-wire steering system of a motor vehicle may include a hollow shaft motor with a stator that is fixed to a housing and a rotatably supported rotor that is arranged coaxially with respect to a longitudinal axis. A worm gear may extend through the rotatably supported rotor. The worm gear comprises a spindle nut that is arranged coaxially relative to the longitudinal axis, that is connected in terms of driving to the rotor, and that is located on a spindle that is displaceable by way of the hollow shaft motor along the longitudinal axis. The angle of inclination of the worm gear may be less than 4.5°.

A steering device according to one embodiment includes: an input device including an input shaft to which rotation associated with operation is transmitted, and a transmission shaft that is disposed orthogonal to the input shaft and rotates in conjunction with the input shaft; a reducer receiving a rotational drive force from the input device and outputting a rotational force about a rotational axis with a reduced rotational speed and an increased torque; a motor providing a rotational auxiliary force to the reducer in a direction that augments the rotational driving force; and an output arm coupled to the reducer and rotating about the rotational axis in a predetermined angular range by the rotational force outputted by the reducer. The input device is disposed on one side of the reducer. The motor is disposed adjacent to a direction orthogonal to the transmission shaft and on the one side of the reducer.

To provide a steering device capable of highly precisely controlling turning angles of steered wheels without changing a layout of members. Provided is a steering device (10A) including: a center arm (26) having one end portion configured to swing in a right-and-left direction with respect to a vehicle body (BD) in synchronism with rotation of a steering shaft (22); a rod member (40A), which is coupled to the one end of the center arm (26), and is configured to move in the right-and-left direction, to thereby change turning angles of steered wheels (WR and WL); and a rod-member drive device (50) configured to linearly move the rod member (40A) in the right-and-left direction through use of a driving force source. The rod member (40A) is supported such that movement of the rod member (40A) in the right-and-left direction of the vehicle body (BD) is allowed, but movement of the rod member (40A) in a front-and-rear direction and an up-and-down direction of the vehicle body (BD) is restricted. The one end portion the center arm (26) and the rod member (40A) are coupled so as to be relatively movable in the front-and-rear direction of the vehicle body (BD).

A speed reducer includes an input rotating body, a base block, a speed reducing mechanism unit and a tubular case. The input rotating body is rotatable when acted upon by power from a drive device. The base block supports the input rotating body rotatably. The speed reducing mechanism unit reduces a speed of rotation of the input rotating body. The tubular case externally covers the speed reducing mechanism unit and the base block. The tubular case is assembled onto the base block such that they are rotatable relative to each other. The speed-reduced rotation from the speed reducing mechanism unit is output from one of the tubular case and the base block. The base block has a fixture flange integrally formed therewith. The flange extends from a radially inner region within the tubular case radially outward beyond an outer peripheral surface of the tubular case.

A speed reducer according to one aspect of the present disclosure includes an input rotating body, a speed reducing mechanism unit, and a tubular case. The speed reducer is rotatable when acted upon by power fed from a drive device. The speed reducing mechanism unit reduces a speed of rotation of the input rotating body. The tubular case covers an outer surface of the speed reducing mechanism unit and rotates when acted upon by speed-reduced power from the speed reducing mechanism unit. An output arm is formed integrally with the tubular case, the output arm extending radially outward from an outer peripheral surface of the tubular case and configured to transmit a manipulating force to an outside.

Provided is a rotary electric machine including a stator including a plurality of stator pieces, a rotor being arranged inside the stator and rotating about a rotation axis, a housing holding the stator and the rotor, a lid member preventing the stator and the rotor from coming out of the housing, and a cylindrical frame forming the stator by containing the plurality of stator pieces and being internally mounted in the housing, in which a first fixing portion and a second fixing portion for fixing the frame to the housing are disposed at both end portions of the frame along an extending direction of the rotation axis.

A supplemental turning function-equipped hub unit includes: a hub unit body including a hub bearing; and a unit support member configured to be mounted through a suspension device, the unit support member supporting the hub unit body through rotation-permitting support components at two upper and lower portions of the hub unit body such that the hub unit body is rotatable about a supplemental turning axis. A supplemental turning force receiving part is provided on a side part of the hub unit body, which part is configured to receive a force that causes the hub unit body to rotate about the supplemental turning axis.

An actuator for imparting steering movement to a tiller of a propulsion unit of a marine vessel comprises an absolute position sensor operable to sense a steering position and a relative position sensor operable to sense a position of the motor. A steering control unit calibrates the relative position sensor based on a signal of the absolute position sensor. Calibration of the relative position sensor based on a signal of the absolute position sensor initializes an accumulative position which accumulates a relative position as the actuator moves over time.