JTEKT Patente

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A control device 10 is mounted on a four-wheel-drive vehicle 1, and includes a detector and a vibration suppression controller. The detector detects the occurrence of a vibrating state, in which drive wheels and auxiliary drive wheels slip alternately in a four-wheel-drive state in which a drive force is transferred to the auxiliary drive wheels, or the occurrence of a preliminary state for the vibrating state. The vibration suppression controller reduces the drive force which is transferred to the auxiliary drive wheels via a drive force transfer device 2 when the vibrating state or the preliminary state is detected by the detector. The vibration suppression controller reduces the drive force which is transferred to the auxiliary drive wheels on condition that a thermal load of the drive force transfer device 2 is less than a predetermined threshold.

To provide a ball screw device and a steering device capable of securing smooth circulation of balls while suppressing occurrence of clogging of the balls caused by displacement in a radial direction between a deflector and a nut main body. A ball screw device includes a ball screw nut (70) and a circulation path (85). The ball screw nut (70) includes a nut main body (80) and a deflector (90). The deflector (90) includes an inclined portion (100) provided at a peripheral part of a connection portion (97) between a passage (94) and the circulation path (85) of the nut main body (80) for securing passing of the balls (51) at the connection portion (97) when an insertion position of the deflector (90) with respect to the deflector mounting hole (81) is displaced from a desired position within a range of a given distance.

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Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

A steering system includes a column jacket (3) including a lower jacket (8) and an upper jacket (7); an engagement member (42); a retaining member (70); and a buffer member (80) that is retained by the retaining member (70) and contacts the engagement member (42) in a contact direction at a time when the upper jacket (7) is displaced to one sliding end. The retaining member (70) includes a support surface (70b) that supports the buffer member (80); paired holding portions (73) that are respectively disposed on both sides of the buffer member (80) in a circumferential direction of the upper jacket (7) and hold the buffer member (80) toward the support surface (70b); and a restriction portion (74) configured to be engaged with an end (80d) of the buffer member (80) on a side toward which an opposite direction is directed, so as to restrict movement of the buffer member (80) in the opposite direction, the opposite direction being opposite to the contact direction.

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Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

A torque detecting apparatus includes an annular magnetic flux collecting ring, a magnetic flux collecting holder surrounding and holding the magnetic flux collecting ring, and a magnetic shield including a circumferential end and attached to the outer periphery of the magnetic flux collecting holder. The magnetic flux collecting holder includes a housing portion that houses in its inner space the circumferential end of the magnetic shield. The housing portion includes an outer wall radially inwardly facing an outer peripheral surface of the circumferential end of the magnetic shield such that a first clearance is provided between the housing portion and the outer peripheral surface of the circumferential end of the magnetic shield.

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A pump housing (12) of a gear pump (3) and a stator (4) of an electric motor (2) are fastened to each other with bolts (14) via a front insulator (13). Dowel pins (15) are inserted in respective through-holes that are formed in the front insulator (13) at equal intervals in a circumferential direction so as to be located next to insertion holes for the bolts (14). Respective end portions of each dowel pin (15) are in contact with a bottom face of the pump housing (12) and a pump-side surface of the stator core (8), and the pump housing (12) and the front insulator (13) are fixed to each other such that a slight gap is formed between the pump housing (12) and the front insulator (13).

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

A steering control device includes a command value setting processing portion configured to set a current command value based on a detection value of steering torque; a feedback processing portion configured to control a voltage applied to a motor (50) so as to control a current flowing through the motor (50) to the current command value, based on an output value of an integral element obtained by using a difference between the current and the current command value; an end determination processing portion configured to determine whether a turning angle of steered wheels (34) has reached a limit angle; and an end-time limit processing portion configured to perform correction to increase a magnitude of the difference, based on a degree of a decrease in a magnitude of a rotational speed of the motor (50) when the end determination processing portion determines that the turning angle has reached the limit angle.

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

A steering control device includes a feedback processing portion configured to control a current flowing through a motor (50) to a current command value; an end determination processing portion configured to determine whether a turning angle of steered wheels (34) has reached a limit angle; and an end-time limit processing portion configured to limit a magnitude of the current command value to a magnitude of a limited current value or smaller, when the end determination processing portion determines that the turning angle has reached the limit angle. The limited current value is a value obtained by performing correction to decrease a magnitude of a detected value of the current flowing through the motor (50) at a time when the end determination processing portion determines that the turning angle has reached the limit angle, based on a degree of a decrease in a magnitude of a rotational speed of the motor (50).

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

A driving force transmission apparatus (1) includes: a first cam mechanism (15) that converts rotational force from a housing (12) into first cam thrust force (P1) used as clutch force of a main clutch (8) when the first cam mechanism (15) is actuated through clutch action of a pilot clutch (10); and a second cam mechanism (16) that is actuated prior to conversion of the rotational force into the first cam thrust force by the first cam mechanism (15), and that generates second cam thrust force (P2) for reducing an interval between clutch plates of the main clutch (8). The second cam mechanism (16) includes an input cam member (160) that rotates upon receiving rotational force used as actuating force of the input cam member (160) from a cam actuating driving source (5), and an output cam member (161) that generates the second cam thrust force (P2) between the output cam member (161) and the input cam member (160) and outputs the second cam thrust force (P2).

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …