Abstract: A magnetic detection device includes a substrate including a penetration part, a magnetic detection part supported on the substrate to overlap the penetration part, a pair of magnetic guiding parts arranged to sandwich the penetration part and the magnetic detection part, the pair of magnetic guiding parts being configured to guide a magnetic flux from a magnetic generation part to the magnetic detection part, and a soft magnetic member at least partially provided inside the penetration part.

Abstract: A magnetic detection device includes a substrate including a penetration part, a magnetic detection part supported on the substrate to overlap the penetration part, a pair of magnetic guiding parts arranged to sandwich the penetration part and the magnetic detection part, the pair of magnetic guiding parts being configured to guide a magnetic flux from a magnetic generation part to the magnetic detection part, and a soft magnetic member at least partially provided inside the penetration part.

Abstract: A torque sensor includes a detector assembly configured to detect a density of a magnetic flux. The detector assembly includes a case configured to house a magnetic detector and a board, the case being attached to a housing, and a connector integrally formed with the case. The case includes a fitting portion configured to be fitted into an opening portion formed in the housing, and a brim portion fastened to the housing. The connector is formed such that a center axis of the connector is offset from the center axis of the fitting portion in a radial direction of the torsion bar, and the connector is formed such that an end surface on a side opposite to a connection port to be connected to a mating connector is offset toward the housing from a contact surface of the brim portion with the housing.

Abstract: Output signals of a torque sensor include a first output signal used in an assist control and a second output signal used in controls other than the assist control. An adjusting device of an electric power steering device includes an input torque meter for measuring an input torque applied to the input shaft, an output torque meter for measuring an output torque output by the steering mechanism, and a sensor output corrector for correcting an output signal of the torque sensor. The sensor output corrector corrects the first output signal so that a relationship between the input torque measured by the input torque meter and the output torque measured by the output torque meter becomes an ideal characteristic set in advance, and corrects the second output signal so that an input torque detected by the torque sensor coincides with the input torque measured by the input torque meter.

Abstract: An adjusting apparatus for an electric power steering device includes a steering mechanism converting an input torque into a steering force and transmitting the steering force to wheels, a torque sensor outputting a torque detection signal according to an input torque, an electric motor applying a steering assist torque according to a torque detection signal output from the sensor, a sensor circuit changing output characteristics of the sensor, an actuator applying an input torque to the steering mechanism, a steering force meter actuating the motor via the sensor according to an input torque and measuring a steering force output by the steering mechanism, and a sensor output adjuster adjusting the output characteristic of the sensor circuit to approximate a steering force measured by the meter to an ideal value set in advance according to a deviation amount calculated based on a difference between the steering force and the ideal value.

Abstract: A torque sensor includes a magnetism generation portion that rotates together with a first shaft, a rotating magnetic circuit portion that rotates together with a second shaft, a fixed magnetic circuit portion fixed to a housing, a magnetism detector that detects a magnetic flux density guided from the magnetism generation portion to the fixed magnetic circuit portion through the rotating magnetic circuit portion in accordance with torsional deformation of the torsion bar, and a shield disposed between the rotating magnetic circuit portion and the magnetism detector in order to shield the magnetism detector magnetically.

Abstract: Output signals of a torque sensor include a first output signal used in an assist control and a second output signal used in controls other than the assist control. An adjusting device of an electric power steering device includes an input torque meter for measuring an input torque applied to the input shaft, an output torque meter for measuring an output torque output by the steering mechanism, and a sensor output corrector for correcting an output signal of the torque sensor. The sensor output corrector corrects the first output signal so that a relationship between the input torque measured by the input torque meter and the output torque measured by the output torque meter becomes an ideal characteristic set in advance, and corrects the second output signal so that an input torque detected by the torque sensor coincides with the input torque measured by the input torque meter.

Abstract: In a torque sensor that detects torque acting on a torsion bar on the basis of a magnetic flux density conducted to a magnetism collecting ring provided in a housing, the magnetism collecting ring is an annular member formed such that an axial direction end portion thereof is thinner than a central portion. The housing includes an annular groove formed to be capable of accommodating the magnetism collecting ring and provided as a recess in an inner peripheral wall of the housing so as to be deeper than a thickness of the end portion of the magnetism collecting ring, and a caulk portion provided in the inner peripheral wall to caulk the magnetism collecting ring by covering the end portion of the magnetism collecting ring that is fitted into the annular groove.

Abstract: A torque sensor includes a magnetism generation portion that rotates together with a first shaft, a rotating magnetic circuit portion that rotates together with a second shaft, a fixed magnetic circuit portion fixed to a housing, a magnetism detector that detects a magnetic flux density guided from the magnetism generation portion to the fixed magnetic circuit portion through the rotating magnetic circuit portion in accordance with torsional deformation of the torsion bar, and a shield disposed between the rotating magnetic circuit portion and the magnetism detector in order to shield the magnetism detector magnetically.

Abstract: In a torque sensor that detects torque acting on a torsion bar on the basis of a magnetic flux density conducted to a magnetism collecting ring provided in a housing, the magnetism collecting ring is an annular member formed such that an axial direction end portion thereof is thinner than a central portion. The housing includes an annular groove formed to be capable of accommodating the magnetism collecting ring and provided as a recess in an inner peripheral wall of the housing so as to be deeper than a thickness of the end portion of the magnetism collecting ring, and a caulk portion provided in the inner peripheral wall to caulk the magnetism collecting ring by covering the end portion of the magnetism collecting ring that is fitted into the annular groove.

Abstract: A vehicle power steering device 1 comprises an input shaft 11, a torque sensor 2 that magnetically detects an input torque input into the input shaft 11, and a position sensor 5 that detects a reference rotation position of the input shaft 11. The position sensor 5 comprises a magnet 52, a first magnetic path forming member 67, 68, 69 that forms a first magnetic loop M for the magnet 52 in the reference rotation position of the input shaft 11, and a magnetic sensing element 56 disposed in the first magnetic loop M. By providing the position sensor 5 with a second magnetic path forming member 67 that forms a second magnetic loop N for the magnet 52 in any rotation position of the input shaft 11 other than the reference rotation position, magnetic flux from the magnet 52 is prevented from leaking to the torque sensor 2.

Abstract: A torque sensor detects a torque acting on a torsion bar provided between a first shaft and a second shaft on the basis of a magnetic flux density led to a rotating magnetic circuit portion from a magnetism generating portion. The magnetism generating portion includes a back yoke and a ring magnet. The back yoke includes a fitting portion fitted onto the first shaft, a joint portion to which the ring magnet is joined, and a stress reduction cutout that suppresses a transmission of a deformation stress generated in a radial direction of the fitting portion to the joint portion.

Abstract: An adjusting apparatus for an electric power steering device includes a steering mechanism converting an input torque into a steering force and transmitting the steering force to wheels, a torque sensor outputting a torque detection signal according to an input torque, an electric motor applying a steering assist torque according to a torque detection signal output from the sensor, a sensor circuit changing output characteristics of the sensor, an actuator applying an input torque to the steering mechanism, a steering force meter actuating the motor via the sensor according to an input torque and measuring a steering force output by the steering mechanism, and a sensor output adjuster adjusting the output characteristic of the sensor circuit to approximate a steering force measured by the meter to an ideal value set in advance according to a deviation amount calculated based on a difference between the steering force and the ideal value.

Abstract: A torque sensor (50) detects an input torque input into a torsion bar (51) using a magnetic force generating part (60), a rotating magnetic circuit (69), a fixed magnetic circuit (90), and a magnetic sensor (98). The rotating magnetic circuit (69) comprises a first soft magnetic member (70) and a second soft magnetic member (80), each of which comprises a magnetic ring (73, 83), a magnetic tip (71, 81) facing the magnetic force generating part (60), and a magnetic column (72, 82) connecting the tip (71, 81) and the ring (73, 83). By disposing the first soft magnetic member (70) and the second soft magnetic ring (80) so as to face each other, the soft magnetic rings (70, 80) are formed in an identical shape that can be manufactured by press-working a plate material, thereby realizing a compact and lightweight torque sensor (50).

Abstract: A torque sensor detects a torque acting on a torsion bar provided between a first shaft and a second shaft on the basis of a magnetic flux density led to a rotating magnetic circuit portion from a magnetism generating portion. The magnetism generating portion includes a back yoke and a ring magnet. The back yoke includes a fitting portion fitted onto the first shaft, a joint portion to which the ring magnet is joined, and a stress reduction cutout that suppresses a transmission of a deformation stress generated in a radial direction of the fitting portion to the joint portion.

Abstract: A torque sensor (50) comprises a magnetic collecting ring (91, 92) fitted into an annular groove (31, 32) formed on the inner periphery (38) of a housing (30). By providing a staking part (33, 34) on the inner periphery (38) of the housing (30) in the vicinity of the annular groove (31, 32) using a staking device (100), the magnetic collecting ring (91, 92) can be secured in the annular groove (31, 32) through a simple process.

Abstract: A vehicle power steering device 1 comprises an input shaft 11, a torque sensor 2 that magnetically detects an input torque input into the input shaft 11, and a position sensor 5 that detects a reference rotation position of the input shaft 11. The position sensor 5 comprises a magnet 52, a first magnetic path forming member 67, 68, 69 that forms a first magnetic loop M for the magnet 52 in the reference rotation position of the input shaft 11, and a magnetic sensing element 56 disposed in the first magnetic loop M. By providing the position sensor 5 with a second magnetic path forming member 67 that forms a second magnetic loop N for the magnet 52 in any rotation position of the input shaft 11 other than the reference rotation position, magnetic flux from the magnet 52 is prevented from leaking to the torque sensor 2.

Abstract: In a torque sensor that detects torque acting on a torsion bar in accordance with the density of magnetic flux guided to a rotating magnetic circuit portion from a magnetism generating portion, the magnetism generating portion includes a back yoke that rotates together with a first shaft, a ring magnet joined to the back yoke, and an adhesive that is interposed between the back yoke and the ring magnet to join the two, and the adhesive includes a rotation-stopping projecting portion that engages with a rotation-stopping recess portion formed in the back yoke to function as a latch for stopping relative rotation between the back yoke and the ring magnet when an adhesion portion thereof adhered to the back yoke peels away.

Abstract: A torque sensor (50) detects an input torque input into a torsion bar (51) using a magnetic force generating part (60), a rotating magnetic circuit (69), a fixed magnetic circuit (90), and a magnetic sensor (98). The rotating magnetic circuit (69) comprises a first soft magnetic member (70) and a second soft magnetic member (80), each of which comprises a magnetic ring (73, 83), a magnetic tip (71, 81) facing the magnetic force generating part (60), and a magnetic column (72, 82) connecting the tip (71, 81) and the ring (73, 83). By disposing the first soft magnetic member (70) and the second soft magnetic ring (80) so as to face each other, the soft magnetic rings (70, 80) are formed in an identical shape that can be manufactured by press-working a plate material, thereby realizing a compact and lightweight torque sensor (50).

Abstract: A torque sensor (50) comprises a magnetic collecting ring (91, 92) fitted into an annular groove (31, 32) formed on the inner periphery (38) of a housing (30). By providing a staking part (33, 34) on the inner periphery (38) of the housing (30) in the vicinity of the annular groove (31, 32) using a staking device (100), the magnetic collecting ring (91, 92) can be secured in the annular groove (31, 32) through a simple process.