Abstract: A centering structure is provided in a device including a first member with an inner peripheral surface and a second member with an outer peripheral surface opposed to the inner peripheral surface. The centering structure includes outer peripheral cam surfaces circumferentially aligned on the inner peripheral surface of the first member, inner peripheral cam surfaces opposed to the outer peripheral cam surfaces, and rolling elements. The inner peripheral cam surfaces form accommodation spaces together with the outer peripheral cam surfaces therebetween. The rolling elements are disposed in the accommodation spaces. Each rolling element rolls along each outer peripheral cam surface and each inner peripheral cam surface. The rolling elements move the first or second member in a direction to cause a center of the inner peripheral surface and a center of the outer peripheral surface to be matched when the first and second members are rotated relative to each other.
Abstract: A rotating electric machine includes a non-rotating member, a stator fixed to the non-rotating member, a field coil fixed to the non-rotating member, disposed on an inner diameter side of the stator, and having an iron core and a winding wound around the iron core, and a rotor rotatably disposed between the stator and the field coil. The rotor includes a first rotor portion and a second rotor portion. The rotating electric machine further comprises a positioning member disposed in each of the first gap, the second gap, and the third gap to position each of the first rotor portion and the second rotor portion in the circumferential direction and the extending direction.
Abstract: A power transmission device includes an electric motor, and a torque converter connected to the electric motor to transmit torque. A torque converter characteristic line is determined based on a capacity coefficient of the torque converter and indicates torque of the torque converter relative to each rotational speed of the torque converter. An electric motor characteristic line indicates a maximum output torque of the electric motor relative to each rotational speed of the electric motor. A first range corresponds to a range equal to and greater than a base rotational speed of the electric motor and equal to or less than a first average rotational speed, which is an average of the base rotational speed and a maximum rotational speed of the electric motor. The capacity coefficient is such that the characteristic line for the torque converter intersects the characteristic line for the electric motor in the first range.
Abstract: A damper device includes a damper device body, an output shaft and a dynamic vibration absorber. The damper device body includes an input member and an output member. The input member and the output member are coupled to be rotatable relative to each other. The output shaft outputs a torque transmitted to it from the damper device body. The dynamic vibration absorber is attached to the output shaft.
Abstract: The present device includes an inertia ring, a plurality of centrifugal elements, a plurality of cam mechanisms and a plurality of restriction mechanisms. The inertia ring is disposed to be rotatable with a hub flange and be rotatable relatively to the hub flange. Each centrifugal element is disposed to receive a centrifugal force generated by rotation of the hub flange and the inertia ring. When a relative displacement is produced between the hub flange and the inertia ring in a rotational direction while the centrifugal force is acting on each centrifugal element, each cam mechanism converts the centrifugal force into a circumferential force directed to reduce the relative displacement. Each restriction mechanism allows actuation of each centrifugal element by each cam mechanism, and restricts radial movement of each centrifugal element.
Abstract: A rotary device includes two rotatable rotors and two stopper mechanisms. The first and second stopper mechanisms restrict relative rotation between the rotors. The first stopper mechanism includes a first protruding member and a first contact surface. The first protruding member includes an elastic outer peripheral part. The first contact surface is disposed at an interval from the first protruding member. The first protruding member contacts the first contact surface when a torsion angle between the rotors reaches a first angle. The second stopper mechanism includes a second protruding member and a second contact surface. The second protruding member includes an outer peripheral part having higher stifffiess than that of the first protruding member. The second contact surface is disposed at an interval from the second protruding member. The second protruding member contacts the second contact surface when the torsion angle reaches a second angle greater than the first angle.
Abstract: A lock-up device for a torque converter is disclosed. The lock-up device includes a clutch part, first and second rotary members, a plurality of elastic members and a stopper mechanism. The clutch part is provided between a front cover and a turbine, and transmits the torque inputted to the front cover to the turbine. The first rotary member is disposed between the clutch part and the turbine. The second rotary member is rotatable relative to the first rotary member. The elastic members elastically couple an outer peripheral part of the first rotary member and an outer peripheral part of the second rotary member in a rotational direction. The stopper mechanism is disposed axially between the elastic members and an outer peripheral part of a turbine shell. The stopper mechanism includes an engaging portion restricting an angular range of relative rotation between the first rotary member and the second rotary member.
Abstract: A rotating electrical machine of a brushless wound field type disposed between a stationary case and rotating member that rotates inside the case includes a stator held by the case, including an AC coil that generates a rotating magnetic field with an alternating current, a field core held by the case, the field core including a field coil that generates a magnetic flux with a direct current, a rotor fixed in contact with an outer circumferential surface of the rotating member and held rotatably relative to the stator and field coil, a rotor side core portion that is a part of the rotating member. The magnetic flux of the field coil passes from the field core through the rotor via the second air gap, the stator and rotor via the first air gap, the rotor side core portion, and the field core via the third air gap.
Abstract: A torque converter is disclosed. The torque converter includes a cover, an impeller, a turbine, a stator, and a first one-way clutch. A torque outputted from a prime mover is inputted to the cover. The impeller is unitarily rotated with the cover. The turbine is opposed to the impeller. The stator is disposed between the impeller and the turbine. The first one-way clutch is configured to make the cover rotatable relative to the turbine in a forward rotational direction. The first one-way clutch is further configured to rotate the cover unitarily with the turbine in a reverse rotational direction.
Abstract: A brushless winding field rotational electric machine positioned between a starting device and a case enclosing the starting device includes: a stator, which is held to the case, including an alternating-current coil configured to generate a rotation magnetic field by alternating current; a field core, which is held to the case, including a field coil to be excited by direct current; and a rotor disposed on an outer periphery of the starting device and rotatably held about a rotational axis relative to the stator and the field coil. The rotor includes a connection portion to be connected to a synchronized rotation member configured to rotate in synchronization with an engine along the rotational axis, on a facing surface to the synchronized rotation member.
Abstract: A vehicle drive apparatus includes a fluid coupling connected to an engine, and a rotating electric machine connected to the engine via the fluid coupling. The fluid coupling has an impeller to which torque having been output from the engine is input, and a turbine facing the impeller. The impeller rotates about a rotation axis. Torque having been output from the impeller is input to the turbine via a fluid. The turbine rotates about the rotation axis. The vehicle drive apparatus has a path provided between an output shaft of the engine and the impeller, the path through which torque having been output from the engine is transmitted to the impeller not via the turbine, and paths through which torque having been input to the impeller is output via the rotating electric machine, passing through a radially outside relative to the impeller with respect to the rotation axis from the impeller via the turbine.
Abstract: A lock-up device for a torque converter transmitting a torque from a front cover to a transmission-side member is disclosed. The lock-up device includes a clutch part, a piston, and a return mechanism. The piston is axially opposed to the front cover through the clutch part. The piston is axially movable and applies a pressing force to the clutch part whereby the clutch part is turned to an activated state. The return mechanism urges the piston away from the front cover. The return mechanism is disposed axially between the front cover and the piston while disposed radially inside the clutch part. The return mechanism includes first and second plates, and an elastic member. The first plate contacts the front cover. The second plate contacts the piston while axially opposed to the first plate. The elastic member is disposed between the first and second plates in a compressed state.
Abstract: A brushless winding field rotational electric machine includes: a stator, held to a case, including an alternating-current coil configured to generate a rotation magnetic field by alternating current; a field core, held to the case, including a field coil to be excited by direct current; and a rotor on an outer periphery of a rotation member and rotatably held about a rotational axis relative to the stator and field coil. The field coil includes a plurality of coil winding layers stacked in a radial direction of the rotational axis. A cross-sectional area along an axial direction of the rotational axis, of a coil winding layer closest to the rotational axis in the radial direction of the rotational axis is smaller than a cross-sectional area along the axial direction of the rotational axis, of a coil winding layer farthest from the rotational axis in the radial direction of the rotational axis.
Abstract: A drive unit is disclosed. The drive unit includes a prime mover, a torque converter, and a power transmission mechanism. A torque is inputted from the prime mover to the torque converter. The power transmission mechanism is disposed between the prime mover and the torque converter. The power transmission mechanism is configured to transmit the torque outputted from the torque converter toward a drive wheel.
Abstract: The present device includes a mass body, a centrifugal element and a plurality of conversion mechanisms. The mass body is disposed to be rotatable with the rotor and be rotatable relative to the rotor. The centrifugal element is disposed to receive a centrifugal force to be generated by rotation of at least one of the rotor and the mass body. Each of the plurality of conversion mechanisms is configured to convert the centrifugal force into a circumferential force when a relative displacement is produced between the rotor and the mass body in a rotational direction. The circumferential force is directed to reduce the relative displacement. The respective plurality of conversion mechanisms are disposed at intervals in a circumferential direction.
Abstract: A moving device adapted to be actuated by a prime mover is disclosed. The moving device allows a caregiver to ride thereon. The moving device comprises a vehicle body and a plurality of rotors. The vehicle body includes a first frame portion and a second frame portion. The first frame portion allows the caregiver to ride thereon and the second frame portion allows a care receiver to ride thereon. The plurality of rotors are provided on the first frame portion and are rotatable in accordance with movement of the vehicle body. A wheel base defined by the plurality of rotors is constant. The second frame portion is provided on the first frame portion so as to be movable in accordance with a motion of the caregiver riding on and getting off the first frame portion.
March 1, 2019
Date of Patent:
May 11, 2021
Hitoshi Katsura, Kazuhito Maeda, Taichi Kitamura, Chika Baba
Abstract: A torque fluctuation inhibiting device is disclosed. The torque fluctuation inhibiting device includes an input member, a pair of inertia rings and an inertia block. The input member, to which a torque is inputted, is disposed to be rotatable. The pair of inertia rings is disposed axially on the both sides of the input member. The pair of inertia rings is disposed to be rotatable relative to the input member. The pair of inertia rings is unitarily rotated with each other. The inertia block is disposed between the pair of inertia rings. The inertia block is attached to the pair of inertia rings.
Abstract: A rotary electrical machine includes a stator, a field core, a rotor, and first and second air gaps. The stator includes an AC coil that generates a rotating magnetic field with an alternating current. The field core includes a field coil excited by a direct current. The rotor is disposed on an outer circumference of a starting apparatus and held rotatably about a rotational axis relative to the stator and the field coil. The first air gap is formed between the stator and the rotor, and allows a magnetic flux to flow therebetween. The second air gap is formed between the field core and the rotor, and allows a magnetic flux to flow therebetween. The second air gap defines an interval extending along a direction that intersects an axial direction of the rotational axis on one end surface of the rotor in the axial direction of the rotational axis.
Abstract: A torque converter includes a front cover to which a power is inputted, an impeller coupled to the front cover, a turbine from which the power is outputted, a stator and a centrifugal clutch. The impeller forms a hydraulic oil chamber together with the front cover. The impeller includes an impeller core. The turbine is opposed to the impeller. The turbine includes a turbine core. The stator is disposed between an inner peripheral part of the impeller and an inner peripheral part of the turbine. The stator is configured to regulate a hydraulic oil flowing from the turbine to the impeller. The centrifugal clutch is disposed in a space between the impeller core and the turbine core. The centrifugal clutch is configured to directly transmit the power from the impeller to the turbine when a rotational speed of the turbine is greater than or equal to a predetermined value.