JTEKT Patente

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An interior permanent magnet rotor includes a cylindrical rotor core having an axial hole extending in an axial direction, and a resin magnet that is formed to fill the axial hole by injection molding and that has a pair of axial end faces. The resin magnet includes a linear portion that has a linear shape in section perpendicular to the axial direction of the rotor core. The linear portion has a first end and a second end located closer to an outer periphery of the rotor core than the first end is. A gate mark is located on the second end of the linear portion on at least one of the axial end faces of the resin magnet.

In a steering system, a pair of side plates (30) of an upper bracket (6) support first tooth rows (71) each including a plurality of first teeth (72) arranged at a pitch and second tooth rows (97) each including a plurality of second teeth (96) arranged at the pitch. An insertion shaft supports third teeth (82) that can come into and out of contact with the first tooth rows (71) and fourth teeth (98) that can come into and out of contact with the second tooth rows (97). One pair out of a pair of the tooth tip (72A) of each first tooth (72) and the tooth tip (96A) of the corresponding second tooth (96) and a pair of the tooth tip (82A) of each third tooth (82) and the tooth tip (98A) of the corresponding fourth tooth (98) are in the same position in a tilt direction, and the other pair are displaced from each other by a length smaller than the pitch in the tilt direction.

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Zusammenfassung wird geladen …

A steering system includes: a first tooth member (41) provided with a first tooth row (44L) that includes a plurality of first teeth (44) each of which has a tooth trace (44A) extending in a lateral direction and which are aligned along a tilt direction, the first tooth row (44L) being elastically deformable in the lateral direction, and a second tooth member (53) including a second tooth row (63L) that includes a plurality of second teeth (63) each of which has a tooth trace (63A) extending in the lateral direction and which are aligned along the tilt direction, the second tooth member (53) facing the first tooth member (41) in the lateral direction. The first tooth member (41) is supported by an upper bracket such that the first tooth row (44L) is disposed away from the upper bracket in the lateral direction. The second tooth member (53) is movable in the tilt direction along with a column jacket.

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Zusammenfassung wird geladen …

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The damper device (50) includes the shaft (21), the large diameter portion housing (52) and the impact absorbing member (53). When the large diameter portion does not apply an impact force on the flange portion (532), the elastic body (53b) is disposed at one of the inner peripheral surface (52c) of the housing and the outer peripheral surface (531 b) of the cylindrical portion (531) having a gap and when the large diameter portion applies the impact force on the flange portion, the elastic body is depressed in an axial direction to be deformed and is brought into contact with all of the inner peripheral surface of the housing, the restricting surface, the outer peripheral surface of the cylindrical portion and the flange portion. The impact receiving member (53a) is restricted from a relative movement relative to the housing by the deformed elastic body and the impact receiving member keeps a non-contact state with the housing.

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Zusammenfassung wird geladen …

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A torque sensor includes a first resolver (1) that outputs a signal corresponding to a rotation angle of a first rotor (10) fitted on an outer periphery of a first rotary shaft (S1), and a second resolver (2) that outputs a signal corresponding to a rotation angle of a second rotor (20) fitted on an outer periphery of a second rotary shaft (S2) coupled to the first rotary shaft (S1) via a torsion bar (3). The torque sensor detects a torque exerted on the first rotary shaft (S1) or the second rotary shaft (S2) based on the signals output from the first resolver (1) and the second resolver (2). A first junction between the first rotary shaft (S1) and the first rotor (10), and a second junction between the second rotary shaft (S2) and the second rotor (20) are formed so as to have different shapes or different sizes.

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Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

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An electric power steering system is provided that allows an actual assist force to follow a target assist force more quickly. An assist command value calculation circuit 33 includes a torque shift control circuit 50, a phase lag compensation control circuit 51, a basic assist control circuit 52, and a phase lead compensation control circuit 53. A determination circuit 38 determines whether a motor 20 has been continuously under high load or not based on a current command value Ia* and a current limit value Ilim. The determination circuit 38 determines whether the motor 20 has been continuously under high load or not by comparing the current command value Ia* with the current limit value Ilim and comparing a basic assist controlled variable Tas* with the current limit value Ilim, and outputs a phase compensation restriction flag. The phase lag compensation control circuit 51 and the phase lead compensation control circuit 53 restrict phase restriction when the phase compensation restriction flag is ON, and continues phase compensation when the phase compensation restriction flag is OFF.

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Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

A vehicle control device 30 controls torque of a drive motor 11 such that rotation of the drive motor 11 is transferred to rear drive wheels 15 of a vehicle via a drive unit 20 that includes a speed reducer 12 including a plurality of gears rotatably supported by bearings. The vehicle control device 30 sets different values as torque restriction values for torque to be generated by the drive motor 11 when the vehicle is driven forward and when the vehicle is driven rearward.

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