Abstract: A power transmission path switching device has a friction engaging device; a rotation transmission state switching device comprising a first member and a second member arranged coaxial with each other and having: a free mode and/or a one-way clutch mode allowing rotation of the first member with respect to the second member, and a lock mode preventing rotation of the first member with respect to the second member; and a control device that, when connecting the friction engaging device and setting the rotation transmission state switching device to the lock mode, has a function of connecting the friction engaging device, and then while maintaining the friction engaging device in a connected state, switches the rotation transmission state switching device to the lock mode.

Abstract: An armature includes an inner plate located on an inner side of a groove and an outer plate located on an outer side of the groove. The hub includes: an outer hub; an inner hub that is coupled to a shaft; and a primary elastic member that is interposed between the inner hub and the outer hub and is configured to exert an elastic force to the outer hub in a direction away from a rotor. The outer hub includes an outer side coupling portion that is opposed to the outer plate and the inner plate and is coupled to the outer plate. The hub includes a secondary elastic member that is clamped between: the outer plate and the inner plate located on one side of the secondary elastic member; and the outer side coupling portion located on another side of the secondary elastic member.

Abstract: A magnetic path forming member is formed by heating a radially intermediate portion of a workpiece made of a magnetic material to melt the radially intermediate portion from one axial face of the workpiece to the other axial face of the workpiece to form a keyhole, and disposing an alloy element in a molten pool around the keyhole to demagnetize a melted portion.

Abstract: A torque transfer mechanism is provided for controlling the magnitude of a clutch engagement force exerted on a multi-plate clutch assembly that is operably disposed between a first rotary and a second rotary member. The torque transfer mechanism includes a power-operated clutch actuator for generating and applying a clutch engagement force on the clutch assembly. Clutch actuator assembly includes a clutch apply operator for controlling the magnitude of a clutch engagement force applied to the clutch assembly. The clutch operator includes a first and second cam plate that are spaced form in one another to define a cavity therebetween. A sealing element extends between the first and second cam plates to seal the cavity between the first and second cam plates for retaining fluids in the cavity.

Abstract: A clutch operating device includes a drive mechanism and an assist mechanism. The drive mechanism is configured to generate a driving force and transmit the driving force to a clutch device. The assist mechanism is a mechanism for assisting the drive mechanism and includes a pressure mechanism and a toggle mechanism. The pressure mechanism is configured to generate a pressing force. The toggle mechanism is configured to convert the pressing force of the pressure mechanism into an assist force gradually increased from a power blocked state to a power transmitted state of the clutch device.

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

Abstract: A clutch operating device includes a drive mechanism and a reduction mechanism. The drive mechanism generates a driving force. The reduction mechanism is a mechanism configured to amplify the driving force by reducing the driving amount to be inputted thereto from the reduction mechanism and convert the amplified driving force into an operating force of a clutch device. The reduction mechanism has a reduction ratio characteristic gradually increasing from a power blocking state to a power transmitting state of the clutch device and is allowed to adjust the reduction ratio characteristic in accordance with a state of the clutch device.

Abstract: A mechanism for changing the operating condition of a shifting element having two shifting element halves, which can either be functionally connected to connect two components or disengaged to break the connection between the components. The mechanism includes a drive machine and a drive converter unit in the area of which rotary drive motion of the drive machine can be converted into a translational actuation movement of the shifting element. A spring device is associated with the drive converter unit, whose spring force assists with actuating the shifting element in the engaging direction. The spring device includes an approximately circular flat spring element which, in at least one area of the drive converter unit, is in contact with at least one cam, whose stress condition varies as a function of an operating condition of the drive converter unit and is designed to be rotationally fixed.

Abstract: A driving force transmission apparatus includes: a housing having an inner peripheral spline portion; an inner shaft having an outer peripheral spline portion; a main clutch including first outer and inner clutch plates respectively engaged with the inner and outer peripheral spline portions; a cam mechanism generating pressing force for pressing the main clutch by relatively rotating a pair of cam members; and an electromagnetic clutch mechanism including an armature engaged with the inner peripheral spline portion and applying rotation force to the cam mechanism for relatively rotating the cam members through energization of an electromagnetic coil. An end face facing the armature is formed in the inner peripheral spline portion between a first region engaged with the first outer clutch plate and a second region engaged with the armature. Movement of the armature toward the first region is regulated by contact of the armature with the end face.

Abstract: A clutch device includes; i) a clutch mechanism including a friction engagement member capable of rotating relative to a rotating member and a clutch member that is supplied with restoration force in a direction in which the clutch member departs from the friction engagement member by a restoration spring; and ii) a cam mechanism including; a cam member that is arranged in parallel to the clutch mechanism along a rotation axis line of the rotating member and that is incapable of rotating relative to the rotating member; and a cam follower capable of rolling on a cam surface that exists between the cam member and the clutch member. The cam angle is set to make torque applied to the clutch member due to reaction force accompanied by friction engagement with the friction engagement member larger than torque applied to the clutch member by thrust force caused by an activation of the cam mechanism.

Abstract: An electromagnetic clutch includes a rotatable input member and a rotatable output member. A clutch plate is fixed for rotation with one of the input member and the output member. An armature plate is axially moveable relative to the other of the input member and the output member. A self-energizing actuator converts rotary motion of the input member to linear movement of the armature plate. The actuator includes a biasing member urging relative rotation between the one of the input member and the output member and the armature plate to initially engage the armature plate and the clutch plate. The self-energizing actuator provides an additional clutch engagement force once the input member is driven and also includes an electromagnet to axially translate the armature plate and disengage the armature plate and the clutch plate.

Abstract: An electromechanical actuating assembly for at least an actuator element of a vehicle transmission with at least a drive device which activates a spindle drive (2) of an actuator device to actuate the actuator element. The actuator device comprises a toggle lever mechanism (4) which is activated via the spindle drive (2), and the actuator device is positioned coaxially with a transmission shaft (5) of the vehicle transmission and is positioned radially inside or radially outside with reference to the actuator element.

Abstract: An electromagnetic clutch includes a rotating member; an electromagnetic coil that is arranged on a rotational axis of the rotating member and generates electro-magnetic force; an output mechanism that has an armature to which return force in a direction away from the electromagnetic coil is applied by a return spring; a cam mechanism that is juxtaposed along the rotational axis to the output mechanism, and has a control cam that is unable to rotate relative to the rotating member, and a cam follower that is able to roll between the control cam and the armature; and a relative rotation restricting device that is arranged on an axis of the cam mechanism, and that is configured to restrict relative rotation between the armature and the control cam when the electromagnetic coil is in a de-energized state.

Abstract: A control apparatus for a clutch driving mechanism can include a clutch driving mechanism which connects and disconnects a clutch. An angle sensor can detect the angle of rotation of a cam member. A cam face can include a first cam face for connecting the clutch through the linear motion of the operating member. A second cam face, formed continuously to the first cam face, can disconnect the clutch through the linear motion of the operating member. The angle sensor 21 can include a first angle sensor which can detect an angular range of the first cam face, and a second angle sensor which can detect an angular range of the second cam face. The dead zones E of the angle sensors are disposed in such a manner as not to overlap with each other.

Abstract: A clutch mechanism includes a coil of wire for producing an electromagnetic field, a locking ring secured against rotation within a case or housing, a gear engageable with the locking ring, and a lever that pivots in response to the electromagnetic field produced by energizing the coil causing the locking ring to engage the gear and hold the gear against rotation.

Abstract: A friction clutch assembly selectively engages an input member and an output member to allow selective transfer of torque therebetween. The friction clutch assembly includes a clutch pack including a first clutch member operatively coupled to the input member and a second clutch member operatively coupled to the output member. The clutch assembly further includes a plurality of lever arms and an actuating member with a movable member that is movably disposed between the plurality of lever arms. The movable member is movable generally along a linear axis between a disengaged position and an engaged position, and the movable member cams the plurality of lever arms relative to linear axis to cause the first and second clutch members to engage when the movable member moves to the engaged position. The first and second clutch members disengage when the movable member moves to the disengaged position.

Abstract: A clutch actuating apparatus for a double clutch transmission, may include an electric unit that generates rotational force, a decelerating unit coupled to the electric unit and reducing the rotational force of the electric unit, a straight-converting unit that converts the rotational force reduced by the decelerating unit into a straight motion force, a push rod that is moved straight by the straight motion force of the straight-converting unit and makes an operational stroke to selectively engage a clutch, a supplement force supplying unit engaging with the push rod to increase the straight movement force to the push rod or to remove the increased straight movement force from the push rod when the push rod engages or disengages the clutch, and a rod locating unit coupled to the push rod and changing a relative position of the push rod to the straight-converting unit.

Abstract: A electromagnetic clutch assembly for use in a vehicle is presented. More specifically, the clutch assembly comprises an input member; an output member; a friction clutch pack having a first plurality of clutch plates coupled for rotation with said input member and a second plurality of clutch plates interleaved with said first plurality of clutch plates and coupled for rotation with said output member; a solenoid coil; an actuator hub having an armature plate; and a cam lever assembly having a first end engaging said actuator hub and a second end engaging said friction clutch pack. When electrical current is applied to the solenoid coil, the armature plate moves the actuator hub, the actuator hub engages the cam lever and causes said cam lever to compress the interleaved first and second plurality of clutch plates, thereby, resulting in the coupling of the input and output members.

Abstract: A device for setting the torque transferred from a primary shaft to a secondary shaft by a friction clutch comprises a supporting element and an axially displaceable adjusting element which is rotatable with respect to the supporting element and which is operatively connected to the friction clutch for the actuation of the latter, the adjusting element comprising a toothed ring, and the supporting element and adjusting element cooperating via coupling elements in such a way that a rotation of the adjusting element in relation to the supporting element brings about an axial displacement of the adjusting element in relation to the supporting element. The device comprises a linearly displaceable rack element which is in engagement with the toothed ring of the adjusting element, and an electrically activatable linear drive arrangement for the controlled displacement of the rack element.

Abstract: An electromagnetic clutch includes: a rotary member; an output mechanism including an electromagnetic coil and an armature moved toward the electromagnetic coil by electromagnetic force; a cam mechanism operated by rotation of the rotary member in the electromagnetic coil energized state; and a coil housing having a coil accommodating portion open toward the armature and accommodating the electromagnetic coil. The coil housing and the armature have frictional engagement faces. The frictional engagement faces of the coil housing and the armature are frictionally-engageable. At least one of the coil housing and the armature has a contact pressure reducing portion for reducing contact pressures of the frictional engagement faces of the coil housing and the armature, generated based on cam thrust generated through an operation of the cam mechanism when the frictional engagement faces of the coil housing and the armature are frictionally-engaged.

Abstract: A driving force transmitting device is comprised of a first rotary member, a second rotary member securely fit around the first rotary member, a third rotary member rotatably supported in the first and second rotary members for being engaged with a shaft, an anti-rotated solenoid slidably fit in a solenoid housing hollow defined by the second rotary member, and a friction clutch driven by the solenoid for transmitting torque between the first rotary member and the third rotary member.

Abstract: A disk friction clutch apparatus using a self-energizing effect is disclosed. The clutch apparatus includes a drive friction disk connected to a drive shaft, a driven friction disk connected to a driven shaft, a push member configured to press the driven friction disk against the drive friction disk at an engagement position of a clutch, and an operation unit configured to shift the push member from the release position of the clutch to the engagement position. The operation unit is operated to increase a force of the push member to press the driven friction disk when the push member located at the engagement position of the clutch receives a force of rotating the drive shaft. Since the clutch apparatus employs a self-energizing effect, it is possible to fasten the clutch with a small force.

Abstract: A double clutch may include an input shaft, a first output shaft disposed coaxially with the input shaft, a second output shaft enclosing the first output shaft and disposed coaxially with the first output shaft, a first clutch pack disposed between the first output shaft and the input shaft, a second clutch pack disposed between the second output shaft and the input shaft, an electromagnet disposed between the first clutch pack and the second clutch pack, a first permanent magnet and a second permanent magnet disposed such that the same poles of the first and second permanent magnets face the electromagnet at both sides of the electromagnet, a first ball ramp operating to press the first clutch pack, as the first permanent magnet moves toward the electromagnet, and a second ball ramp operating to press the second clutch pack, as the second permanent magnet moves toward the electromagnet.

Abstract: A control apparatus for a clutch driving mechanism can include a clutch driving mechanism which connects and disconnects a clutch. An angle sensor can detect the angle of rotation of a cam member. A cam face can include a first cam face for connecting the clutch through the linear motion of the operating member. A second cam face, formed continuously to the first cam face, can disconnect the clutch through the linear motion of the operating member. The angle sensor 21 can include a first angle sensor which can detect an angular range of the first cam face, and a second angle sensor which can detect an angular range of the second cam face. The dead zones E of the angle sensors are disposed in such a manner as not to overlap with each other.

Abstract: An electromechanical actuating assembly for at least an actuator element of a vehicle transmission with at least a drive device which activates a spindle drive (2) of an actuator device to actuate the actuator element. The actuator device comprises a toggle lever mechanism (4) which is activated via the spindle drive (2), and the actuator device is positioned coaxially with a transmission shaft (5) of the vehicle transmission and is positioned radially inside or radially outside with reference to the actuator element.

Abstract: An electromechanical actuating assembly for at least an actuator element of a vehicle transmission with at least a drive device which is coupled with to an actuator device to activate an actuator element. The actuator device comprises of a toggle lever mechanism which is actuated by a ramped contour.

Abstract: A torque transmission apparatus includes first and second torque transmission members 3, 5, a frictional clutch 7 for transmitting a torque between the torque transmission members 3, 5, a stationary housing 11 accommodating a coupling 9, a spatial part for enclosing oil in the stationary housing 11 and an opening 15 formed in a part of the coupling 9 so that the oil in the stationary housing 11 is introduced into the coupling 9.

Abstract: An electromagnetic clutch includes a rotating member; an electromagnetic coil that is arranged on a rotational axis of the rotating member and generates electro-magnetic force; an output mechanism that has an armature to which return force in a direction away from the electromagnetic coil is applied by a return spring; a cam mechanism that is juxtaposed along the rotational axis to the output mechanism, and has a control cam that is unable to rotate relative to the rotating member, and a cam follower that is able to roll between the control cam and the armature; and a relative rotation restricting device that is arranged on an axis of the cam mechanism, and that is configured to restrict relative rotation between the armature and the control cam when the electromagnetic coil is in a de-energized state.

Abstract: A clutch drive apparatus includes a clutch actuator and a drive force transmission mechanism that transmits the drive force of the clutch actuator to the clutch. The drive force transmission mechanism includes a case body and a case cover that is closed on the case body and supports the clutch actuator and a worm shaft. An opening is formed in the case cover to expose a marker member that determines a reference position of an auxiliary elastic body. A maintenance lid for covering the opening is mounted in a vehicle head pipe.

Abstract: A transfer case for selectively coupling a secondary driveline with a primary driveline comprises: a first output shaft; a second output shaft; a clutch assembly disposed at the second output shaft, the clutch assembly including inner and outer drum members, one of the inner and outer drum members rotatable in association with rotation of the first output shaft and the other one of the inner and outer drum members coupled with the second output shaft, the clutch assembly further including a plurality of frictional clutch plates, the frictional clutch plates formed of at least one frictional clutch plate coupled with the inner drum member and at least one frictional clutch plate coupled with the outer drum member; an actuator shaft rotatably coupled with an actuator; and a clutch actuator means coupled with the actuator for applying axial force to the frictional clutch plates to transmit a drive torque of the first output shaft to the second output shaft.

Abstract: A cam mechanism is provided with a forward rotation plate and a reverse rotation plate. The respective plates are urged by the respective coil springs in the directions opposite to each other. When the number of rotations of the front wheels becomes great relative to the number of rotations of the rear wheels, the forward rotation plate rotates. Thus, a main cam which is urged by the respective coil springs toward the neutral position rotates together with the forward rotation plate when the forward rotation plate rotates. When the number of rotations of the rear wheels becomes great relative to the number of rotations of the front wheels, the reverse rotation plate rotates. Thus, the main cam which is urged by the respective coil springs toward the neutral position rotates together with the reverse rotation plate when the reverse rotation plate rotates.

Abstract: A wheel disconnect system is provided including a rear drive module and a constant velocity joint housing. The rear drive module includes a housing, at least one actuator, and at least one dog clutch. The dog clutch includes a first portion configured to move when the actuator is moved and a second portion configured for engagement with the first portion. The constant velocity joint housing is formed integrally with the second portion of the dog clutch. A wheel may be disconnected from the rear drive module unless engagement of the first and second portions of the dog clutch allows torque to be transferred to the wheel. In one embodiment, a hydraulically activated piston may be used to activate the first portion of the dog clutch. In another embodiment, a ball ramp may be used to activate the first portion of the dog clutch. A vehicle driveline including a wheel disconnect system is also provided.

Abstract: A clutch drive device includes an actuator for generating a drive force for driving a clutch, a first solid of revolution, a mechanism for transmitting the drive force of the actuator to the clutch, and an assist spring unit having one end pivotally supported and another end abutting on the solid of revolution. An abutment structure in which the first solid of revolution abuts on the assist spring unit is configured so that an urging force of the assist spring does not act in a direction of rotating the first solid of revolution at least at one position in a play area in which the clutch is not disengaged even if the first solid of revolution rotates.

Abstract: The invention relates to a power divider for motor vehicles, comprising a housing (1), a primary shaft (2) having a drive connection to a first driven axis, a controlled friction coupling (4) and a displacement drive (6, 7, 8) for the drive of a second driven axis. The friction coupling (4) can be actuated by means of two ramp rings (1, 16) which can rotate counter to each other and which comprise articulated jacks (19, 20). In order to use the toothed wheels as a displacement drive and to provide a compact and economical actuator, the control curves are embodied on a control cam (25) which comprises two control sliding tracks (35, 36) which are offset in relation to each other and can be rotated about a parallel axis in relation to the axis of primary shaft (2). The control cam (25) is rotationally mounted on the second toothed wheel (7) or the shaft thereof (9).

Abstract: A compact power unit for a vehicle having a clutch actuator is provided. The power unit includes a clutch actuator and a drive force transmission mechanism for transmitting the drive force of the clutch actuator to the clutch. The clutch actuator and the drive force transmission mechanism are arranged within a casing of the power unit. A drive shaft of the clutch actuator extends in the vertical direction. The drive force transmission mechanism includes a worm shaft coupled to the drive shaft of the clutch actuator, a first solid of revolution including a worm wheel portion which engages the worm shaft, a second solid of revolution which engages a gear portion of the first solid of revolution, and a ball cam. The ball cam converts torque from the second solid of revolution into a force which acts in the axial direction of a slide shaft of the clutch.

Abstract: A torque transfer device for a motor vehicle includes a clutch for transferring torque between first and second shafts. An electromagnetic actuator includes an axially moveable armature for applying an application force to the clutch. An actuator control system includes a force sensor positioned within a clutch actuation force load path and is operable to output a signal indicative of a force applied to the clutch. The control system includes a controller operable to control the electromagnetic actuator to vary the force applied to the clutch based on the force sensor signal.

Abstract: Controllable electromechanical clutch primarily for automated devices of various applications like blocking or interlocking mechanisms, electronic locks, robotics, automotive devices, comprising concentrically arranged outer and inner bodies, interacting through the coupling joint with coupling elements associated with one of the bodies which can block rotation of another clutch body, an electrical actuator and a control element associated with this actuator which has two stable positions wherein low energy electrical impulse applied to an actuator can be used to change the position of the mentioned control element, so that the coupling elements change its trajectory and result in engagement or disengagement of the clutch.

Abstract: A power transfer/transmission apparatus includes clutch adjusting mechanisms that are easy to assemble and are stably supported, the power transfer/transmission apparatus has a clutch housing, the clutch housing includes a vertical wall (a flange and a vertical wall) connected to a joint shaft and a peripheral wall connected to the vertical wall and enclosing a main clutch, the flange has an output unit support that rotatably supports a first end of a clutch output unit at a position that is axially different from the position of the joint shaft, a second end of the clutch output unit includes a centering part that forms a hollow axle joint having inner splines engaged with an axle so that the axle joint and axle may rotate together.

Abstract: A clutch assembly which incorporates brushless motor technology to engage a clutch pack to cause two shafts to rotate in unison. The clutch actuation assembly includes a clutch apply member, a base plate disposed about an axis, a cam plate disposed about the axis, and at least one cam, operably associated with the base plate and the cam plate. At least one load transferring member operably associated with the at least one cam, as well as an actuator for providing relative rotation between the cam plate and the base plate about the axis, causing the at least one load transferring member to move with respect to the at least one cam, and the cam plate to translate along the axis actuating said clutch apply member.

Abstract: In a power transmitting device, projections are formed on a surface of a main cam that faces an armature. This structure causes the main cam to contact the armature only at distal surfaces of the projections. The area of the distal surfaces of the projections is in a range where the magnetic flux density generated at the distal surfaces of the projections by the electromagnet is saturated. Therefore, reduction of the responsiveness and controllability of the power transmitting device due to magnetization of the main cam is suppressed.

Abstract: An electromagnetic clutch is provided with: a clutch hub which is connected to a shaft member (one of a pair of rotation members); a clutch housing which is connected to a hollow shaft (the other of a pair of rotation members); a rotor which is connected to the clutch housing; a main clutch (clutch member) which is disposed between the clutch hub and the clutch housing; and an electromagnet which operates the main clutch. An end surface of the clutch housing and an end surface of a core of the electromagnet are disposed to be opposed to each other with the rotor interposed therebetween in an axial direction. The end of the rotor in a side of the clutch housing is formed with an extension portion which extends to the clutch housing in the axial direction. An outer periphery of the clutch housing is connected to the extension portion through a connection portion. The connection portion is disposed outside the main clutch in a radial direction.

Abstract: An electric clutch actuator capable of operating in two power loss conditions. For a condition where a normally engaged clutch is disengaged during a system power loss and the desired action is for the clutch to remain in the disengaged positional state, a holding device moves to a power off activated position to prevent movement of an actuator for the clutch. For a condition where the clutch is disengaged during a system power loss and the desired action is for the clutch to move to an engaged positional state, a motor in the electric clutch actuator is used as a generator to convert the potential energy of a clutch pressure spring into electrical energy to provide energy for powering the holding device to remain deactivated, permitting movement of the clutch actuator to the engaged position. Maintaining the holding device deactivated permits the clutch to move to the engaged position and thereby allows vehicle engine braking to be used during a power loss of the system.

Abstract: In an electromagnetic clutch apparatus for forming a magnetic path in a circulating shape by an electromagnet at a pilot clutch alternately arranged with a main outer plate and a main inner plate and capable of controlling to transmit a torque between a clutch housing and a cam plate by being engaged in an axial direction and at a surrounding of a nonmagnetic portion continuously formed in the axial direction of a middle portion in a diameter direction of the pilot clutch to carry out an engaging, the nonmagnetic portion is formed by through holes in a circular arc shape having bridge portions for maintaining a shape in a diameter direction of the pilot clutch therebetween in a peripheral direction, and the bridge portion is divided in the diameter direction of the pilot clutch and a nonmagnetic member is interposed between divisions thereof.

Abstract: A friction clutch includes an iron inner clutch plate and two iron outer clutch plates. Each clutch plate has a sliding surface that friction-engages with the other clutch plates. A diamond-like carbon film containing silicon, which functions as a solid lubricant, is formed on the sliding surface of each outer clutch plate through a conventional method such as plasma chemical vapor deposition. The diamond-like carbon film contains 1 wt % to 80 wt % of silicon. A coupling device includes a pilot clutch mechanism that has the friction clutch and an electromagnetic actuator. As a result, the friction clutch has an improved resistance to wear, and the coupling device is durable.

Abstract: An axial setting device includes two discs which are centered on a common axis. One is axially supported and the other one is axially displaceable, and at least one is rotatingly drivable. The two discs on their end faces, each have a plurality of circumferential ball grooves. The ball grooves each comprise a depth which decreases in the same direction, and each pair of opposed ball grooves accommodates a ball. At least the ball grooves of one of the two discs, starting from the region of the greatest groove depth, comprise a first groove portion with a greater pitch and an adjoining second groove portion with a smaller pitch, wherein the first groove portion extends over a smaller circular-arch-shaped portion than the second groove portion.

Abstract: An electric motor applies torque to a ball and ramp actuator element generating thrust that is transferred through a bearing from the stationary actuator to the rotating clutch pack elements of a marine transmission.

Abstract: A four-wheel drive center disconnect electric actuator is provided. The actuator includes a one-way motor that actuates a cam mechanism for causing engagement and disengagement of the center disconnect. The actuator achieves improved reliability and efficiency through a less expensive construction than conventional actuators.

Abstract: A power transmission device for a motor vehicle includes a clutch for transferring torque between first and second shafts. A clutch actuation system includes a drive member and a cam member in cooperation with one another. The drive member is driven by an electric motor and includes first and second rollers rotatably mounted thereon. The cam member includes first and second circumferentially extending channels, each having a continually reducing radius. The first and second channels are separate from and overlap one another. The first roller is positioned within the first channel to engage the drive member and the cam member. The second roller is positioned within the second channel to engage the drive member and the cam member such that relative rotation between the drive member and the cam member translates the cam member along an axis of relative rotation to vary the force applied to the clutch.

Abstract: A driving force transmitting apparatus includes: a first torque-transmitting member having a cylindrical portion and provided with a spline tooth; a second torque-transmitting member positioned inside the cylindrical portion and arranged coaxially rotatably relative to the first torque-transmitting member; a main clutch with a spline tooth; an actuator unit for actuating the main clutch to be engaged; and a controlling device for controlling the actuator unit so as to pressurize the main clutch plate in such a manner that torque is not substantially transmitted between the first torque-transmitting member and the second torque-transmitting member when the engagement of the main clutch is judged to be unnecessary.

Abstract: The invention relates to a friction clutch consisting of primary and secondary disks and a pressure plate. The clutch also includes an actuator with two coaxial rings that can be rotated independent of one another. The rings compress the disks during relative rotation. In order to provide an actuator which operates accurately and with zero loss, an electric motor having at least one drive wheel is provided for the relative rotation of both rings. The drive wheel is drivingly connected to the two rings by a traction means. Two chains of the traction means lead from the drive wheel to the rotatable rings, wherein the ends of the chains are fixed to their corresponding ring, and the two rings have different diameters.