EP3039310A1 - Système magnétique pour commander le mode de fonctionnement d'un ensemble d'accouplement à roue libre et accouplement à roue libre et ensemble de commande magnétique l'ayant - Google Patents

Système magnétique pour commander le mode de fonctionnement d'un ensemble d'accouplement à roue libre et accouplement à roue libre et ensemble de commande magnétique l'ayant

Info

Publication number
EP3039310A1
EP3039310A1 EP14839279.8A EP14839279A EP3039310A1 EP 3039310 A1 EP3039310 A1 EP 3039310A1 EP 14839279 A EP14839279 A EP 14839279A EP 3039310 A1 EP3039310 A1 EP 3039310A1
Authority
EP
European Patent Office
Prior art keywords
coupling
assembly
armature
pocket
magnetic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP14839279.8A
Other languages
German (de)
English (en)
Other versions
EP3039310A4 (fr
Inventor
John W. Kimes
Terry O. Hendrick
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Means Industries Inc
Original Assignee
Means Industries Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US14/288,819 external-priority patent/US9234552B2/en
Application filed by Means Industries Inc filed Critical Means Industries Inc
Publication of EP3039310A1 publication Critical patent/EP3039310A1/fr
Publication of EP3039310A4 publication Critical patent/EP3039310A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D27/00—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor
    • F16D27/02—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with electromagnets incorporated in the clutch, i.e. with collecting rings
    • F16D27/09—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with electromagnets incorporated in the clutch, i.e. with collecting rings and with interengaging jaws or gear-teeth
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D27/00—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor
    • F16D27/02—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with electromagnets incorporated in the clutch, i.e. with collecting rings
    • F16D27/04—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with electromagnets incorporated in the clutch, i.e. with collecting rings with axially-movable friction surfaces
    • F16D27/06—Magnetically- or electrically- actuated clutches; Control or electric circuits therefor with electromagnets incorporated in the clutch, i.e. with collecting rings with axially-movable friction surfaces with friction surfaces arranged within the flux
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00—External control of clutches
    • F16D48/06—Control by electric or electronic means, e.g. of fluid pressure
    • F16D48/064—Control of electrically or electromagnetically actuated clutches
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/10—System to be controlled
    • F16D2500/102—Actuator
    • F16D2500/1021—Electrical type
    • F16D2500/1022—Electromagnet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/302—Signal inputs from the actuator
    • F16D2500/3026—Stroke
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/70—Details about the implementation of the control system
    • F16D2500/704—Output parameters from the control unit; Target parameters to be controlled
    • F16D2500/70402—Actuator parameters
    • F16D2500/7041—Position

Definitions

  • Coupling assemblies such as clutches are used in a wide variety of applications to selectively couple power from a first rotatable driving member, such as a driving disk or plate, to a second, independently rotatable driven member, such as a driven disk or plate.
  • a first rotatable driving member such as a driving disk or plate
  • a second, independently rotatable driven member such as a driven disk or plate.
  • the clutch engages to mechanically couple the driving member to the driven member only when the driving member rotates in a first direction relative to the driven member. Once so engaged, the clutch will release or decouple the driven member from the driving member only when the driving member rotates in a second, opposite direction relative to the driven member. Further, the clutch otherwise permits the driving member to freely rotate in the second direction relative to the driven member.
  • Such “freewheeling" of the driving member in the second direction relative to the driven member is also known as the "overrunning" condition.
  • One type of one-way clutch includes coaxial driving and driven plates having generally planar clutch faces in closely spaced, juxtaposed relationship.
  • a plurality of recesses or pockets is formed in the face of the driving plate at angularly spaced locations about the axis, and a strut or pawl is disposed in each of the pockets.
  • Multiple recesses or notches are formed in the face of the driven plate and are engageable with one or more of the struts when the driving plate is rotating in a first direction.
  • the driving plate rotates in a second direction opposite the first direction, the struts disengage the notches, thereby allowing freewheeling motion of the driving plate with respect to the driven plate.
  • Controllable or selectable one-way clutches are a departure from traditional one-way clutch designs.
  • Selectable OWCs add a second set of locking members in combination with a slide plate. The additional set of locking members plus the slide plate adds multiple functions to the OWC.
  • controllable OWCs are capable of producing a mechanical connection between rotating or stationary shafts in one or both directions.
  • OWCs are capable of overrunning in one or both directions.
  • a controllable OWC contains an externally controlled selection or control mechanism. Movement of this selection mechanism can be between two or more positions which correspond to different operating modes.
  • U.S. Patent No. 5,927,455 discloses a bi-directional overrunning pawl-type clutch
  • U.S. Patent No. 6,244,965 discloses a planar overrunning coupling
  • U.S. Patent No. 6,290,044 discloses a selectable one-way clutch assembly for use in an automatic transmission.
  • U.S. Patent Nos. 7,258,214 and 7,344,010 disclose overrunning coupling assemblies
  • U.S. Patent No. 7,484,605 discloses an overrunning radial coupling assembly or clutch.
  • a properly designed controllable OWC can have near-zero parasitic losses in the
  • tip-in clunk is one of most difficult challenges due to absence of a torque converter.
  • gear shift harshness and noise called clunk
  • Tip-in clunk is especially acute in a parking-lot maneuver, in which a vehicle coasting at low speed is then accelerated in order to maneuver into a parking space.
  • a powershift transmission should employ a control strategy that is different from that of a conventional automatic transmission.
  • the control system should address the unique operating characteristics of a powershift transmission and include remedial steps to avoid the objectionable harshness yet not interfere with driver expectations and performance requirements of the powershift transmission. There is a need to eliminate shift harshness and noise associated with tip-in clunk in a powershift transmission.
  • Coupled should be interpreted to include clutches or brakes wherein one of the plates is drivably connected to a torque delivery element of a transmission and the other plate is drivably connected to another torque delivery element or is anchored and held stationary with respect to a transmission housing.
  • the terms “coupling”, “clutch” and “brake” may be used interchangeably.
  • a pocket plate may be provided with angularly disposed recesses or pockets about the axis of the one-way clutch.
  • the pockets are formed in the planar surface of the pocket plate.
  • Each pocket receives a torque transmitting strut, one end of which engages an anchor point in a pocket of the pocket plate.
  • An opposite edge of the strut which may hereafter be referred to as an active edge, is movable from a position within the pocket to a position in which the active edge extends outwardly from the planar surface of the pocket plate.
  • the struts may be biased away from the pocket plate by individual springs.
  • a notch plate may be formed with a plurality of recesses or notches located approximately on the radius of the pockets of the pocket plate. The notches are formed in the planar surface of the notch plate.
  • U.S. Pat. No. 6,854,577 discloses a sound-dampened, one-way clutch including a plastic/steel pair of struts to dampen engagement clunk.
  • the plastic strut is slightly longer than the steel strut. This pattern can be doubled to dual engaging. This approach has had some success. However, the dampening function stopped when the plastic parts became exposed to hot oil over a period of time.
  • Metal injection molding is a metalworking process where finely -powdered metal is mixed with a measured amount of binder material to comprise a ⁇ feedstock" capable of being handled by plastic processing equipment through a process known as injection mold forming.
  • the molding process allows complex parts to be shaped in a single operation and in high volume. End products are commonly component items used in various industries and applications.
  • the nature of MIM feedstock flow is defined by a science called rheology. Current equipment capability requires processing to stay limited to products that can be molded using typical volumes of 100 grams or less per "shot" into the mold.
  • Rheology does allow this "shot" to be distributed into multiple cavities, thus becoming cost-effective for small, intricate, high-volume products which would otherwise be quite expensive to produce by alternate or classic methods.
  • the variety of metals capable of implementation within MIM feedstock are referred to as powder metallurgy, and these contain the same alloying constituents found in industry standards for common and exotic metal applications. Subsequent conditioning operations are performed on the molded shape, where the binder material is removed and the metal particles are coalesced into the desired state for the metal alloy.
  • U.S. patent documents related to at least one aspect of the present invention includes U.S. Patent Nos. 8,491,440; 8,491,439; 8,272,488; 8,187,141; 8,079,453; 8,007,396; 7,942,781; 7,690,492; 7,661,518; 7,455,157; 7,455,156; 7,451,862; 7,448,481; 7,383,930; 7,223,198; 7,100,756; and 6,290,044; and U.S. published application Nos.
  • the term "sensor” is used to describe a circuit or assembly that includes a sensing element and other components.
  • the term “magnetic field sensor” is used to describe a circuit or assembly that includes a magnetic field sensing element and electronics coupled to the magnetic field sensing element.
  • magnetic field sensing element is used to describe a variety of electronic elements that can sense a magnetic field.
  • the magnetic field sensing elements can be, but are not limited to, Hall effect elements, magnetoresistance elements, or magnetotransistors.
  • Hall effect elements for example, a planar Hall element, a vertical Hall element, and a circular vertical Hall (CVH) element.
  • GMC giant magnetoresistance
  • AMR anisotropic magnetoresistance element
  • TMR tunneling magnetoresistance
  • InSb Indium antimonide
  • MTJ magnetic tunnel junction
  • some of the above-described magnetic field sensing elements tend to have an axis of maximum sensitivity parallel to a substrate that supports the magnetic field sensing element, and others of the above-described magnetic field sensing elements tend to have an axis of maximum sensitivity perpendicular to a substrate that supports the magnetic field sensing element.
  • planar Hall elements tend to have axes of sensitivity perpendicular to a substrate
  • magnetoresistance elements and vertical Hall elements including circular vertical Hall (CVH) sensing element
  • Magnetic field sensors are used in a variety of applications, including, but not limited to, an angle sensor that senses an angle of a direction of a magnetic field, a current sensor that senses a magnetic field generated by a current carried by a current-carrying conductor, a magnetic switch that senses the proximity of a ferromagnetic object, a rotation detector that senses passing ferromagnetic articles, for example, magnetic domains of a ring magnet, and a magnetic field sensor that senses a magnetic field density of a magnetic field.
  • an angle sensor that senses an angle of a direction of a magnetic field
  • a current sensor that senses a magnetic field generated by a current carried by a current-carrying conductor
  • a magnetic switch that senses the proximity of a ferromagnetic object
  • a rotation detector that senses passing ferromagnetic articles, for example, magnetic domains of a ring magnet
  • a magnetic field sensor that senses a magnetic field density of a magnetic field.
  • Modern automotive vehicles employ an engine transmission system having gears of different sizes to transfer power produced by the vehicle's engine to the vehicle's wheels based on the speed at which the vehicle is traveling.
  • the engine transmission system typically includes a clutch mechanism which may engage and disengage these gears.
  • the clutch mechanism may be operated manually by the vehicle's driver, or automatically by the vehicle itself based on the speed at which the driver wishes to operate the vehicle.
  • a clutch-position sensing component for sensing the linear position of the clutch may be used by automatic transmission vehicles to facilitate gear shifting and transmission control.
  • U.S. Patent No. 8,324,890 discloses a transmission clutch position sensor which includes two Hall sensors located at opposite ends of a flux concentrator outside the casing of the transmission to sense a magnetic field generated by a magnet attached to the clutch piston. To reduce sensitivity to magnet-to-sensor gap tolerances, a ratio of the voltage of one Hall sensor to the sum of the voltages from both Hall sensors is used to correlate to the piston and, hence, clutch position.
  • An object of at least one embodiment of the present invention is to provide a magnetic control system for controlling the operating mode of an overrunning coupling assembly and an overrunning coupling and magnetic control assembly having such a system.
  • a magnetic system for controlling the operating mode of an overrunning coupling assembly includes a coupling member having a first coupling face and a coupling subassembly having a second coupling face with a pocket defining a load-bearing shoulder.
  • the coupling faces are in close-spaced opposition with one another.
  • At least one of the coupling member and the coupling subassembly is mounted for rotation about a rotary axis.
  • the system includes a ferromagnetic or magnetic element received within the pocket in an uncoupling position and movable outwardly from the pocket to a coupling position characterized by abutting engagement of the element with the load-bearing shoulder.
  • the element controls the operating mode of the coupling assembly.
  • An electromagnetic source includes at least one excitation coil.
  • a reciprocating armature is arranged concentrically relative to the at least one excitation coil and is axially movable when the at least one excitation coil is supplied with current.
  • the armature is connected to the element to move the element between the coupling and uncoupling positions.
  • a magnetic field sensor is disposed adjacent and stationary with respect to the element for sensing magnetic flux to produce an output signal which is based on the position of the element.
  • a variable magnetic field is generated in response to movement of the element between the coupling and uncoupling positions.
  • the sensor may include a magnetic field sensing element.
  • the sensor may be back-biased wherein the element is a ferromagnetic element.
  • the element may be a locking element which controls the operating mode of the coupling assembly.
  • the locking element may be an injection molded strut.
  • the system may further include a return biasing member to urge the armature to a return position which corresponds to the uncoupling position of the element.
  • the coupling faces may be oriented to face axially.
  • the pocket may have a T-shape.
  • the element may include at least one projecting leg portion which provides an attachment location for a leading end of the armature.
  • Each leg portion may have an aperture, wherein the system may further include a pivot pin received within each aperture to allow rotational movement of the element in response to reciprocating movement of the armature and wherein the leading end of the armature may be connected to the element via the pivot pin.
  • Each aperture may be an oblong aperture to receive the pivot pin to allow both rotation and translational movement of the element in response to reciprocating movement of the armature.
  • the coupling assembly may be a clutch assembly and the coupling faces may be clutch faces.
  • an overrunning coupling and magnetic control assembly includes a coupling member having a first coupling face and a coupling subassembly having a second coupling face with a pocket defining a load-bearing shoulder.
  • the coupling faces are in close-spaced opposition with one another.
  • At least one of the coupling member and the coupling subassembly is mounted for rotation about a rotary axis.
  • a ferromagnetic or magnetic element is received within the pocket in an uncoupling position and is movable outwardly from the pocket to a coupling position characterized by abutting engagement of the element with the load- bearing shoulder.
  • An electromagnetic source includes at least one excitation coil.
  • a reciprocating armature is arranged concentrically relative to the at least one excitation coil and is axially movable when the at least one excitation coil is supplied with current.
  • the armature is connected to the element to move the element between the coupling and uncoupling positions.
  • a magnetic field sensor is disposed adjacent and stationary with respect to the element for sensing magnetic flux to produce an output signal which is based on the position of the element.
  • a variable magnetic field is generated in response to movement of the element between the coupling and uncoupling positions.
  • the sensor may include a magnetic field sensing element.
  • the sensor may be back-biased wherein the element is a ferromagnetic element.
  • the element may be a locking element such as an injection molded strut.
  • the assembly may further include a return biasing member to urge the armature to a return position which corresponds to the uncoupling position of the element.
  • the coupling faces may be oriented to face axially.
  • the pocket may have a T-shape.
  • the element may include at least one projecting leg portion which provides an attachment location for a leading end of the armature.
  • Each leg portion may have an aperture.
  • the assembly may further include a pivot pin received within each aperture to allow rotational movement of the element in response to reciprocating movement of the armature.
  • the leading end of the armature may be connected to the element via the pivot pin.
  • Each aperture may be an oblong aperture to receive the pivot pin to allow both rotation and translational movement of the element in response to reciprocating movement of the armature.
  • the coupling member may be a clutch member and the coupling faces may be clutch faces.
  • FIG. 1 is an exploded perspective view of a magnetic control system of at least one embodiment of the present invention taken from the bottom of the system;
  • FIG. 2 is an exploded perspective view of the system taken from the top of the system;
  • FIG. 3 is a view, partially broken away and in cross section, of an overrunning coupling and magnetic control assembly of at least one embodiment of the present invention utilizing the system.
  • the assembly 11 includes a first coupling member, generally indicated at 10, a notch plate or member, generally indicated at 12, and an electromechanical apparatus, generally indicated at 15.
  • the coupling assembly 11 may be a ratcheting, one-way clutch assembly.
  • the second member 12 includes a second coupling face 16 in closed- spaced opposition with an outer coupling face 14 of a housing part 13 of the apparatus 15 when the members 10 and 12 are assembled and held together by a locking or snap ring 18. At least one of the members 10 and 12 is mounted for rotation about a common rotational axis.
  • the outer coupling face 14 of the housing part 13 has a single, T-shaped recess or pocket 22, as best shown in Figure 2.
  • the recess 22 defines a load-bearing first shoulder 24.
  • the second coupling face 16 of the notch plate 12 has a plurality of recesses or notches (not shown but well known in the art). Each notch of the notches defines a load-bearing second shoulder.
  • the electromechanical apparatus 15 may include a locking strut or element, generally included at 26, disposed between the coupling faces 14 and 16 of the housing part 13 and the member 12, respectively, when the members 10 and 12 are assembled and held together.
  • the element 26 may comprise a ferromagnetic locking element or strut movable between first and second positions.
  • the first position (phantom lines in Figure 3) is characterized by abutting engagement of the locking element 26 with a load-bearing shoulder (not shown) of the member 12 and the shoulder 24 of the pocket 22 formed in an end wall 28 of the housing part 13.
  • the second position (solid lines in Figure 3) is characterized by non-abutting engagement of the locking element 26 with a load-bearing shoulder of at least one of the member 12 and the end wall 28.
  • the electromechanical apparatus 15 includes the housing part 13 which has a closed axial end including the end wall 28.
  • the end wall 28 has the outer coupling face 14 with the single pocket 22 which defines the load-bearing shoulder 24 which is in communication with an inner face 29 of the end wall 28.
  • the housing part 13 may be a metal (such as aluminum) injection molded (MIM) part.
  • the apparatus 15 also includes an electromagnetic source, generally indicated at 31, including at least one excitation coil 33 which is at least partially surrounded by a skirt of the housing part 13.
  • the element or strut 26 is shown as being received within the pocket 22 in its retracted, uncoupling position in Figure 3.
  • the strut 26 is movable outwardly from the pocket 22 to an extended, coupling position (phantom lines in Figure 3) characterized by abutting engagement of the strut 26 with a load-bearing shoulder of the notch plate 12 and the shoulder 24.
  • the apparatus 15 also includes a reciprocating armature, generally indicated at 35, arranged concentrically relative to the at least one excitation coil 33 and is axially movable when the at least one excitation coil 33 is supplied with current.
  • the coil 33 is wound about a tube 45 between plates 43 and 47.
  • the plate 43 abuts against the surface 29.
  • the armature 35 extends through a hole 46 formed through the plate 43 and is connected at its leading end 37 to the element 26 to move the element 26 between its coupling and uncoupling positions.
  • the armature 35 also extends through an aperture 38 formed through the tube 45.
  • the opposite end 36 of the armature 35 has a locking ring 30 ( Figure 1) which limits movement of the armature 35 in the aperture 38 towards the plate 12 by abutting against the lower surface of the tube 45 but allows the armature 35 to extend below the lower surface of the tube 45.
  • the element 26 is pivotally connected to the leading end 37 of the armature 35 wherein the armature 35 pivotally moves the element 26 within the pocket 22 in response to reciprocating movement of the armature 35.
  • the apparatus 15 also preferably includes a return spring 41, which extends between the plate 43 and a shoulder in the outer surface of the tube 45, to return the armature 35 and the tube 45 to their home position when the coil 33 is de-energized, thereby returning the element 26 to its uncoupling position.
  • the apparatus also includes a spring 34 which urges the armature 35 to move the element 26 towards its coupling position.
  • the biasing member, the spring 41 urges the armature 35 via the tube 45 to a return position which corresponds to its uncoupling position of the element 26 while the biasing member or spring 34 urges the armature 35 and connected element 26 to its coupled position and opposes any force in the opposite direction.
  • the housing part 13 and/or the plate 47 preferably has holes to allow oil to circulate within the housing part 13.
  • the at least one coil 33, the housing part 13, the tube 45 and the armature 35 comprise a low profile solenoid.
  • the locking element 26 may be a metal (such as aluminum) injection molded (i.e. MIM) strut.
  • the housing part 13 has at least one apertured attachment flange 49 to attach the apparatus 15 to the coupling member 10 (corresponding aperture not shown) of the coupling assembly 11.
  • the element 26 includes at least one and, preferably, two projecting leg portions 51 which provide an attachment location for the leading end 37 of the armature 35.
  • Each leg portion 51 has an aperture 53.
  • the apparatus 15 further comprises a pivot pin 55 received within each aperture 53 to allow rotational movement of the element 26 in response to reciprocating movement of the armature 35 wherein the leading end 37 of the armature 35 is connected to the element 26 via the pivot pin 55.
  • each aperture 53 is an oblong aperture which receives the pivot pin 55 to allow both rotation and translational movement of the element 26 in response to reciprocating movement of the armature 35.
  • Each locking strut 26 may comprise any suitable rigid material such as ferrous metal, (i.e. steel).
  • Figures 1, 2 and 3 show a magnetic field sensor or device, generally indicated at 100.
  • the device 100 may be a Hall-effect sensor which senses position of the strut 26.
  • the strut 26 may carry or support a rare-earth, automotive grade, magnet or pellet (not shown) which may be embedded in a hole formed in the outer surface of the strut 26.
  • the strut 26 is a non- ferrous strut such as an aluminum strut.
  • the strut 26 is a ferromagnetic strut.
  • the device 100 typically has three wires 108 (input, output and ground) and provides an industry standard, push-pull voltage output based on position of the strut 26 in the pocket 22.
  • the device 100 accurately detects the position of the strut 26 with a single output (i.e., voltage output).
  • the device 100 is preferably mounted adjacent to and below the pocket 22 and the wires 108 extend through an aperture 109 formed in the plate 43 and through an aperture 110 formed through the side wall or skirt of the housing part 13.
  • the wires 108 are coupled to a solenoid controller ( Figure 3) which, in turn, is coupled to a main controller and to a coil drive circuit which supplies drive signals to the coil 33 in response to control signals from the solenoid controller.
  • the device 100 may be held in place by fasteners or by an adhesive so that an upper surface of the device 100 is in close proximity to the bottom surface of the strut 26 in the uncoupling position of the strut 26.
  • the sensor 100 is typically back-biased when the strut 26 is ferromagnetic and typically includes a Hall sensor or sensing element mounted on a circuit board 114 on which other electronics or components are mounted, as is well-known in the art.
  • the sensor 100 is preferably back-biased in that it includes a rare-earth magnet 112 which creates a magnetic flux or field which varies as the strut 26 moves.
  • the sensor 100 may comprise a back-biased, Hall Effect device available from Allegro Microsystems.
  • the device 100 is preferably a back-biased device wherein the device includes a rare earth pellet or magnet whose magnetic field varies as the strut 26 moves towards and away from its uncoupled position.
  • the variable magnetic field is sensed by the magnetic sensing element of the device 100.
  • the output signal from the device 100 is a feedback signal which is received by the solenoid controller which, in turn, provides a control signal to the circuit which, in turn, provides drive control signals to control current flow to the coil 73.
  • the solenoid controller which, in turn, provides a control signal to the circuit which, in turn, provides drive control signals to control current flow to the coil 73.
  • the electromechanical apparatus 15 of the exemplary clutch assembly 11 may be carried by a driving member of the clutch assembly 11 or a driven member of the assembly 1 1.
  • the strut 26 of the exemplary clutches assemblies may have any suitable configuration depending on whether the assembly is a planar coupling assembly as shown herein or a rocker coupling assembly (not shown).
  • each strut or rocker in a radial coupling assembly may have a middle portion that is thicker than each end portion of the strut or rocker.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
  • Electromagnets (AREA)

Abstract

L'invention porte sur un système magnétique pour commander le mode de fonctionnement d'un ensemble d'accouplement à roue libre. Le système comprend un élément ferromagnétique ou magnétique reçu à l'intérieur d'une poche dans une position de désaccouplement, et qui est mobile vers l'extérieur à partir de la poche jusqu'à une position d'accouplement. L'élément commande le mode de fonctionnement de l'ensemble d'accouplement. Une armature est reliée à l'élément de façon à déplacer l'élément entre les positions d'accouplement et de désaccouplement. Un capteur de champ magnétique est disposé au voisinage de l'élément et de façon stationnaire vis-à-vis de celui-ci pour détecter un flux magnétique afin de produire un signal de sortie qui est basé sur la position de l'élément. Un champ magnétique variable est généré en réponse à un mouvement de l'élément entre les positions d'accouplement et de désaccouplement.
EP14839279.8A 2013-08-27 2014-06-10 Système magnétique pour commander le mode de fonctionnement d'un ensemble d'accouplement à roue libre et accouplement à roue libre et ensemble de commande magnétique l'ayant Withdrawn EP3039310A4 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201361870434P 2013-08-27 2013-08-27
US201461941741P 2014-02-19 2014-02-19
US14/288,819 US9234552B2 (en) 2010-12-10 2014-05-28 Magnetic system for controlling the operating mode of an overrunning coupling assembly and overrunning coupling and magnetic control assembly having same
PCT/US2014/041631 WO2015030899A1 (fr) 2013-08-27 2014-06-10 Système magnétique pour commander le mode de fonctionnement d'un ensemble d'accouplement à roue libre et accouplement à roue libre et ensemble de commande magnétique l'ayant

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JP6615976B2 (ja) 2019-12-04
WO2015030899A1 (fr) 2015-03-05

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