Abstract: A differential includes a drive rotating body rotatable about a rotation axis, a planetary rotating body that is rotatable and is revolvable about the rotation axis, and a driven rotating body rotatable about the rotation axis. The planetary rotating body is made to mesh with each of the drive rotating body and the driven rotating body, so that a first speed reducer is constituted between the planetary rotating body and the drive rotating body and so that a second speed reducer is constituted between the planetary rotating body and the driven rotating body. The planetary rotating body is driven by an electric motor, and the drive rotating body is driven by a driving force from an engine. The intake camshaft is provided on the driven rotating body, and the exhaust camshaft is provided on the drive rotating body.

Abstract: A differential device (5) of an electric actuator (1) includes a driving rotary body (2), a driven rotary body (3), and a planetary rotary body (52). A first speed reducer (5a) is formed between the planetary rotary body (52) and the driving rotary body (2). A second speed reducer (5b) is formed between the planetary rotary body (52) and the driven rotary body (3). The electric actuator (1) includes a first bearing (53) configured to support the planetary rotary body (52) on an inner side of a rotor (42) of an electric motor (4), and a second bearing (54) configured to support the planetary rotary body (52) at a position shifted in an axial direction so as to be prevented from overlapping the rotor (42). The second bearing (54) is formed of a deep-groove ball bearing.

Abstract: A rotation braking device includes a clutch mechanism disposed between an inner member and an outer member. The clutch mechanism includes an electromagnetic actuator which controls relative rotation of the cage such that, due to the relative rotation, engaging elements are moved between an engaged position and a neutral position. An armature is rotationally fixed relative to the cage, and can be directly magnetically attracted to an electromagnet which is rotationally fixed relative a housing that houses the clutch mechanism. The outer member is directly supported in a radial direction by the housing and engages the housing so as to limit relative rotation relative to each other.

Abstract: A differential device (5) of an electric actuator (1) includes a driving rotary body (2), a driven rotary body (3), and a planetary rotary body (52). A first speed reducer (5a) is formed between the planetary rotary body (52) and the driving rotary body (2). A second speed reducer (5b) is formed between the planetary rotary body (52) and the driven rotary body (3). The electric actuator (1) includes a first bearing (53) configured to support the planetary rotary body (52) on an inner side of a rotor (42) of an electric motor (4), and a second bearing (54) configured to support the planetary rotary body (52) at a position shifted in an axial direction so as to be prevented from overlapping the rotor (42). The second bearing (54) is formed of a deep-groove ball bearing.

Abstract: A differential includes a drive rotating body rotatable about a rotation axis, a planetary rotating body that is rotatable and is revolvable about the rotation axis, and a driven rotating body rotatable about the rotation axis. The planetary rotating body is made to mesh with each of the drive rotating body and the driven rotating body, so that a first speed reducer is constituted between the planetary rotating body and the drive rotating body and so that a second speed reducer is constituted between the planetary rotating body and the driven rotating body. The planetary rotating body is driven by an electric motor, and the drive rotating body is driven by a driving force from an engine. The intake camshaft is provided on the driven rotating body, and the exhaust camshaft is provided on the drive rotating body.

Abstract: An oil pump includes a hollow rotor having an inner peripheral portion defining a space inside of the inner peripheral portion. A first one-way clutch configured to transmit the motive power input from an engine side, to the rotor only in one direction, and a second one-way clutch configured to transmit the motive power input from an electric motor side, to the rotor only in the one direction are arranged inside of the inner peripheral portion of the rotor.

Abstract: A rotation braking device includes a clutch mechanism disposed between an inner member and an outer member. The clutch mechanism includes an electromagnetic actuator which controls relative rotation of the cage such that, due to the relative rotation, engaging elements are moved between an engaged position and a neutral position. An armature is rotationally fixed relative to the cage, and can be directly magnetically attracted to an electromagnet which is rotationally fixed relative a housing that houses the clutch mechanism. The outer member is directly supported in a radial direction by the housing and engages the housing so as to limit relative rotation relative to each other.

Abstract: A spool valve includes a spool in a spool insertion hole defined in a valve body. The spool is configured to be moved by an electric motor via a ball-screw to a first position where an input port is in communication with an output port, while the output port is not in communication with a drain port, and to a second position where the input port is not in communication with the output port, while the output port is in communication with the drain port.

Abstract: An automatic clutch device includes an axial force generating mechanism formed by an electric motor adjacent to the outer periphery of an end of an input shaft of a transmission, and a rotation-linear motion conversion mechanism for converting the rotation of the rotor of the electric motor to a linear motion of a release bearing. The rotation-linear motion conversion mechanism includes plural tubes having different diameters and slidably fitted one in another to form a telescopic tube assembly on the input shaft; and cam mechanisms each disposed between a respective opposed pair of the tubes for converting the rotation of the larger-diameter one of the pair of tubes to a linear motion of the smaller-diameter one of the pair.

Abstract: An automatic clutch device includes an axial force generating mechanism including an electric motor arranged adjacent to the outer periphery of an end of an input shaft of a transmission, and a rotation-linear motion conversion mechanism for converting the rotation of the rotor of the electric motor to a linear motion of a release bearing. The rotation-linear motion conversion mechanism includes plural annular cam plates arranged in tandem on the input shaft, and torque cam mechanisms each disposed between each opposed pair of cam plates, for reduced size and improved responsiveness of the automatic clutch device.

Abstract: A rotation transmission device is provided in which a collision sound by an armature and a rotor is less likely to occur, and further the armature is stably attracted to the rotor. A buffer is provided between the armature and the rotor. The buffer is constituted by a metal annulus axially movably supported by the armature, and a rubber annulus configured such that as the armature approaches the rotor, the rubber annulus is axially compressed by the metal annulus and the armature. The rubber annulus has different axial thicknesses at different circumferential locations thereof such that when the degree of axial compression of the rubber annulus is large, the rubber annulus is axially compressed in its longer circumferential area than when the degree of axial compression of the rubber annulus is small.

Abstract: A rotation transmission device is provided in which leakage of magnetism from an armature to a control retainer is reduced, and of which a two-way clutch can be operated accurately and reliably. This device includes a restricting arrangement for restricting the fitting amount between a coupling tube of the armature and a tubular portion of the control retainer such that a gap is defined between a back surface of the armature, with respect to its surface to be attracted to a rotor, and an end surface of the tubular portion, to prevent leakage of magnetism from the back surface of the armature to the end surface of the tubular portion when an electromagnet is energized and the armature is pulled to the rotor.

Abstract: A rotation transmission device includes an electromagnetic clutch including an armature, a rotor having an outer tubular portion and an inner tubular portion, and an electromagnet. A bearing support tube is provided at the outer end surface of a core supporting an electromagnetic coil of the electromagnet. A bearing is mounted in the bearing support tube so as to be axially fixed in position and not to be pulled out of the bearing support tube. The small-diameter tubular portion is provided at the end of the inner tubular portion of the rotor, and press-fitted in the bearing such that the rotor and the electromagnet form a unit.

Abstract: A clutch unit includes a lever-side clutch portion for controlling transmission and interruption of rotational torque to an output side through lever operation, and a brake-side clutch portion for transmitting torque input from the lever-side clutch portion to the output side and for interrupting torque reversely input from the output side. The lever-side clutch portion has an outer centering spring provided between a lever-side outer ring to be rotated through the lever operation and a cover restricted in rotation, for accumulating an elastic force obtained by torque input from the lever-side outer ring and for restoring the lever-side outer ring to a neutral state with the accumulated elastic force through releasing of the torque input from the lever-side outer ring.

Abstract: A rotation transmission device includes torque cams provided between opposed surfaces of a flange of a control retainer and a flange of a rotary retainer and configured to convert an axial movement of the control retainer to relative rotational motion between the two retainers. All of the torque cams are circumferentially offset from all of the pillars of the control retainer and all of the pillars of the rotary retainer, and a pair of cam grooves forming each torque cam are heat-treated only at their areas that are brought into contact with a ball of the torque cam, to increase the hardness of these areas, thus improving the durability of the retainers.

Abstract: An electromagnetic connection device includes an armature (4), a rotor (3), an electromagnetic coil (14), and a spring member (24) that biases the armature (4) in a direction in which the armature (4) is separated from the rotor (3). The electromagnetic connection device includes a damping member (25) mounted on the armature (4) so as to face the rotor (3). The armature (4) includes a flat portion (22) and a tubular portion (8). The damping member (25) includes a damper cover (26) including an abutment portion along the flat portion (22) and an engaging portion along the tubular portion (8), and an elastic member (27) sandwiched between the abutment portion and the flat portion (22). The damper cover (26) is put on the armature (4) from the side of the rotor (3) and movably held on the tubular portion (8). The flat portion (22) includes a concave portion (35) configured to store the abutment portion of the damper cover (26).

Abstract: A rotation transmission device is configured such that when an electromagnet of an electromagnetic clutch is energized, an armature is attracted toward a rotor, so that a control retainer defining a two-way clutch is moved in an axial direction, whereby the control retainer and a rotary retainer are rotated relative to each other in a direction in which circumferential widths of pockets decrease, thereby disengaging pairs of rollers from an inner periphery of an outer ring and an outer periphery of an inner ring. The rotation transmission device includes a shock absorbing member on a surface of the armature facing the rotor, the shock absorbing member being configured to absorb impact force when the armature is attracted to the rotor by being elastically deformed.

Abstract: A rotation transmission device includes an inner ring provided on an input shaft, an outer ring provided on an output shaft, rollers mounted between the inner periphery of the outer ring and the outer periphery of the inner ring, an electromagnet as a driving source for moving a roller retainer mounted at the end portion of the housing on the side of the input shaft, a first bearing mounted between the electromagnet and the input shaft, a second bearing mounted between the end portion of the housing on a side of the output shaft and the output shaft, and a third bearing mounted between the inner ring and the outer ring. The rotation transmission device further includes a fourth bearing configured to prevent inclination of the axes of the input shaft and the output shaft relative to each other.

Abstract: An oil pump includes a hollow rotor having an inner peripheral portion defining a space inside of the inner peripheral portion. A first one-way clutch configured to transmit the motive power input from an engine side, to the rotor only in one direction, and a second one-way clutch configured to transmit the motive power input from an electric motor side, to the rotor only in the one direction are arranged inside of the inner peripheral portion of the rotor.

Abstract: An automatic clutch device includes an axial force generating mechanism formed by an electric motor disposed adjacent the outer periphery of an end of an input shaft of a transmission, and a rotation-linear motion conversion mechanism for converting the rotation of the rotor of the electric motor to a linear motion of a release bearing. The rotation-linear motion conversion mechanism includes plural tubes having different diameters and slidably fitted one in another to form a telescopic tube assembly on the input shaft; and cam mechanisms each disposed between a respective opposed pair of the tubes for converting the rotation of the larger-diameter one of the pair of tubes to a linear motion of the smaller-diameter one of the pair.