Annular solenoid with axially overlapping electromagnet and armature
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F16H-048/06
F16H-048/30
H01F-007/12
H01F-003/00
출원번호
UP-0493723
(2009-06-29)
등록번호
US-7785224
(2010-09-20)
발명자
/ 주소
York, Todd M.
Pinkos, Andrew F.
출원인 / 주소
American Axle & Manufacturing, Inc.
대리인 / 주소
Harness, Dickey & Pierce, P.L.C.
인용정보
피인용 횟수 :
3인용 특허 :
75
초록▼
An electromagnetic actuator having an annular pole piece and an annular armature with surfaces formed thereon through which a magnetic flux passes. One of the annular pole piece and the annular armature is axially movable relative to the other between a first position, in which the surfaces are spac
An electromagnetic actuator having an annular pole piece and an annular armature with surfaces formed thereon through which a magnetic flux passes. One of the annular pole piece and the annular armature is axially movable relative to the other between a first position, in which the surfaces are spaced axially apart by a minimum distance, and a second position in which the surfaces are spaced axially apart by a maximum distance. The surfaces axially overlap one another but do not touch when the one of the annular pole piece and the annular armature is positioned in the first position and in the second position.
대표청구항▼
What is claimed is: 1. A locking differential comprising: a case that is configured to be rotatable about an axis; a gearset received in the case, the gearset comprising a first side gear, a second side gear and a plurality of pinions that are configured to transmit rotary power between the case an
What is claimed is: 1. A locking differential comprising: a case that is configured to be rotatable about an axis; a gearset received in the case, the gearset comprising a first side gear, a second side gear and a plurality of pinions that are configured to transmit rotary power between the case and at least one of the first and second side gears; a dog clutch that is selectively actuatable to control speed differentiation between the first and second side gears, the clutch comprising a first clutch member and a second clutch member that is coupled to the first side gear, wherein the first clutch member is axially movable along a translation axis that is coincident with the rotational axis between a first position and a second position, the first and second clutch members being engaged to one another when the first clutch member is in the first position, the first and second clutch members being disengaged from one another when the first clutch member is in the second position; an electromagnet comprising a shell member and a coil, the shell member being formed of a ferrous material and defining an annular cavity having a longitudinal axis that is disposed coincident with the translation axis, the shell member having an annular flange, which defines a first end of the annular cavity, and a circumferentially extending projection that extends axially concentric with the longitudinal axis from the annular flange, the circumferentially extending projection comprising a tapered surface that is disposed on a side of the circumferentially extending projection opposite the annular cavity, the coil having an annular shape and being received in the annular cavity; and an armature comprising an annular body portion that extends longitudinally about the translation axis, the annular body portion having a mating tapered surface; wherein actuation of the dog clutch is controlled through selective energization of the electromagnet, wherein the tapered surface and the mating tapered surface are configured to lie axially in-line with one another when the first clutch member is moved between the first and second positions, and wherein the tapered surface and the mating tapered surface are configured to lie radially in-line with one another when the first clutch member is in at least one of the first and second positions; and wherein at least a portion of the tapered face of the circumferentially extending projection is disposed radially in-line with the coil. 2. The locking differential of claim 1, wherein the electromagnet is fixed to the case and energization of the electromagnet is configured to move the armature. 3. The locking differential of claim 1, wherein the shell member comprises a tubular body that is coupled to a side of the annular flange opposite the circumferentially extending projection. 4. The locking differential of claim 1, wherein a second tapered surface is formed on the circumferentially extending projection on a side facing the annular cavity. 5. The locking differential of claim 1, wherein the coil has a first axial end, which is abutted against the annular flange, and a second axial end opposite the first axial end, and wherein an end of the circumferentially extending projection that is disposed on a side opposite the annular flange terminates between the first and second axial ends of the coil. 6. A locking differential comprising: a case that is configured to be rotatable about an axis; a gearset received in the case, the gearset comprising a first side gear, a second side gear and a plurality of pinions that are configured to transmit rotary power between the case and at least one of the first and second side gears; a dog clutch that is selectively actuatable to control speed differentiation between the first and second side gears, the clutch comprising a first clutch member and a second clutch member that is coupled to the first side gear, wherein the first clutch member is axially movable along a translation axis that is coincident with the rotational axis between a first position and a second position, the first and second clutch members being engaged to one another when the first clutch member is in the first position, the first and second clutch members being disengaged from one another when the first clutch member is in the second position; an electromagnet comprising a shell member and a coil, the shell member being formed of a ferrous material and defining an annular cavity having a longitudinal axis that is disposed coincident with the translation axis, the shell member having an annular flange, which defines a first end of the annular cavity, and a circumferentially extending projection that extends axially concentric with the longitudinal axis from the annular flange, the circumferentially extending projection comprising a tapered surface that is disposed on a side of the circumferentially extending projection opposite the annular cavity, the coil having an annular shape and being received in the annular cavity; and an armature comprising an annular body portion that extends longitudinally about the translation axis, the annular body portion having a mating tapered surface; wherein actuation of the dog clutch is controlled through selective energization of the electromagnet, wherein the tapered surface and the mating tapered surface are configured to lie axially in-line with one another when the first clutch member is moved between the first and second positions, and wherein the tapered surface and the mating tapered surface are configured to lie radially in-line with one another when the first clutch member is in at least one of the first and second positions; wherein the electromagnet further comprises a housing that forms a generally U-shaped circumferentially extending channel with an radially inner wall member and a radially outer wall, the shell member being received into the generally U-shaped circumferentially extending channel between the radially inner wall and the radially outer wall. 7. The locking differential of claim 6, further comprising a sensor that is coupled to the housing, the sensor being configured to produce a sensor signal indicative of the relative positioning of the armature and the housing in at least one position. 8. A locking differential comprising: a case that is configured to be rotatable about an axis; a gearset received in the case, the gearset comprising a first side gear, a second side gear and a plurality of pinions that are configured to transmit rotary power between the case and at least one of the first and second side gears; a dog clutch that is selectively actuatable to control speed differentiation between the first and second side gears, the clutch comprising a first clutch member and a second clutch member that is coupled to the first side gear, wherein the first clutch member is axially movable along a translation axis that is coincident with the rotational axis between a first position and a second position, the first and second clutch members being engaged to one another when the first clutch member is in the first position, the first and second clutch members being disengaged from one another when the first clutch member is in the second position; an electromagnet comprising a shell member and a coil, the shell member being formed of a ferrous material and defining an annular cavity having a longitudinal axis that is disposed coincident with the translation axis, the shell member having an annular flange, which defines a first end of the annular cavity, and a circumferentially extending projection that extends axially concentric with the longitudinal axis from the annular flange, the circumferentially extending projection comprising a tapered surface that is disposed on a side of the circumferentially extending projection opposite the annular cavity, the coil having an annular shape and being received in the annular cavity; and an armature comprising an annular body portion that extends longitudinally about the translation axis, the annular body portion having a mating tapered surface; wherein actuation of the dog clutch is controlled through selective energization of the electromagnet, wherein the tapered surface and the mating tapered surface are configured to lie axially in-line with one another when the first clutch member is moved between the first and second positions, and wherein the tapered surface and the mating tapered surface are configured to lie radially in-line with one another when the first clutch member is in at least one of the first and second positions; wherein the electromagnet further comprises a second shell member that is disposed on a side of the coil opposite the shell member, the second shell member having a cylindrical surface onto which the annular body portion is slidably engaged. 9. A locking differential comprising: a case that is configured to be rotatable about an axis; a gearset received in the case, the gearset comprising a first side gear, a second side gear and a plurality of pinions that are configured to transmit rotary power between the case and at least one of the first and second side gears; a dog clutch that is selectively actuatable to control speed differentiation between the first and second side gears, the clutch comprising a first clutch member and a second clutch member that is coupled to the first side gear, wherein the first clutch member is axially movable along a translation axis that is coincident with the rotational axis between a first position and a second position, the first and second clutch members being engaged to one another when the first clutch member is in the first position, the first and second clutch members being disengaged from one another when the first clutch member is in the second position; an electromagnet comprising a shell member and a coil, the shell member defining an annular cavity having a longitudinal axis that is disposed coincident with the translation axis, the shell member being formed of a ferrous material and having an annular flange, which defines a first end of the annular cavity, and a circumferentially extending projection that extends axially concentric with the longitudinal axis from the annular flange, the circumferentially extending projection comprising a tapered surface, the coil having an annular shape and being received in the annular cavity; and an armature comprising an annular body portion that extends longitudinally about the translation axis, the annular body portion having a mating tapered surface; wherein actuation of the dog clutch is controlled through selective energization of the electromagnet, wherein the tapered surface and the mating tapered surface are configured to lie axially in-line with one another when the first clutch member is moved between the first and second positions, and wherein the tapered surface and the mating tapered surface are configured to lie radially in-line with one another when the first clutch member is in at least one of the first and second positions; wherein the coil has a first axial end, which is abutted against the annular flange, and a second axial end opposite the first axial end; and wherein the tapered surface of the circumferentially extending projection is disposed between the first and second axial ends of the coil. 10. The locking differential of claim 9, wherein the electromagnet is fixed to the case and energization of the electromagnet is configured to move the armature. 11. The locking differential of claim 9, wherein the shell member comprises a tubular body that is coupled to a side of the annular flange opposite the circumferentially extending projection. 12. The locking differential of claim 9, wherein a second tapered surface is formed on the circumferentially extending projection on a side facing the annular cavity. 13. The locking differential of claim 9, wherein the circumferentially extending projection is spaced radially apart from the coil. 14. A locking differential comprising: a case that is configured to be rotatable about an axis; a gearset received in the case, the gearset comprising a first side gear, a second side gear and a plurality of pinions that are configured to transmit rotary power between the case and at least one of the first and second side gears; a dog clutch that is selectively actuatable to control speed differentiation between the first and second side gears, the clutch comprising a first clutch member and a second clutch member that is coupled to the first side gear, wherein the first clutch member is axially movable along a translation axis that is coincident with the rotational axis between a first position and a second position, the first and second clutch members being engaged to one another when the first clutch member is in the first position, the first and second clutch members being disengaged from one another when the first clutch member is in the second position; an electromagnet comprising a shell member and a coil, the shell member defining an annular cavity having a longitudinal axis that is disposed coincident with the translation axis, the shell member being formed of a ferrous material and having an annular flange, which defines a first end of the annular cavity, and a circumferentially extending projection that extends axially concentric with the longitudinal axis from the annular flange, the circumferentially extending projection comprising a tapered surface, the coil having an annular shape and being received in the annular cavity; and an armature comprising an annular body portion that extends longitudinally about the translation axis, the annular body portion having a mating tapered surface; wherein actuation of the dog clutch is controlled through selective energization of the electromagnet, wherein the tapered surface and the mating tapered surface are configured to lie axially in-line with one another when the first clutch member is moved between the first and second positions, and wherein the tapered surface and the mating tapered surface are configured to lie radially in-line with one another when the first clutch member is in at least one of the first and second positions; wherein the coil has a first axial end, which is abutted against the annular flange, and a second axial end opposite the first axial end; and wherein an end of the circumferentially extending projection that is disposed on a side opposite the annular flange terminates between the first and second axial ends of the coil; wherein the electromagnet further comprises a housing that forms a generally U-shaped circumferentially extending channel with a radially inner wall member and a radially outer wall, the shell member being received into the generally U-shaped circumferentially extending channel between the radially inner wall and the radially outer wall. 15. The locking differential of claim 14, further comprising a sensor that is coupled to the housing, the sensor being configured to produce a sensor signal indicative of the relative positioning of the armature and the housing in at least one position. 16. A locking differential comprising: a case that is configured to be rotatable about an axis; a gearset received in the case, the gearset comprising a first side gear, a second side gear and a plurality of pinions that are configured to transmit rotary power between the case and at least one of the first and second side gears; a dog clutch that is selectively actuatable to control speed differentiation between the first and second side gears, the clutch comprising a first clutch member and a second clutch member that is coupled to the first side gear, wherein the first clutch member is axially movable along a translation axis that is coincident with the rotational axis between a first position and a second position, the first and second clutch members being engaged to one another when the first clutch member is in the first position, the first and second clutch members being disengaged from one another when the first clutch member is in the second position; an electromagnet comprising a shell member and a coil, the shell member defining an annular cavity having a longitudinal axis that is disposed coincident with the translation axis, the shell member being formed of a ferrous material and having an annular flange, which defines a first end of the annular cavity, and a circumferentially extending projection that extends axially concentric with the longitudinal axis from the annular flange, the circumferentially extending projection comprising a tapered surface, the coil having an annular shape and being received in the annular cavity; and an armature comprising an annular body portion that extends longitudinally about the translation axis, the annular body portion having a mating tapered surface; wherein actuation of the dog clutch is controlled through selective energization of the electromagnet, wherein the tapered surface and the mating tapered surface are configured to lie axially in-line with one another when the first clutch member is moved between the first and second positions, and wherein the tapered surface and the mating tapered surface are configured to lie radially in-line with one another when the first clutch member is in at least one of the first and second positions; wherein the coil has a first axial end, which is abutted against the annular flange, and a second axial end opposite the first axial end; and wherein an end of the circumferentially extending projection that is disposed on a side opposite the annular flange terminates between the first and second axial ends of the coil; wherein the electromagnet further comprises a second shell member that is disposed on a side of the coil opposite the shell member, the second shell member having a cylindrical surface onto which the annular body portion is slidably engaged. 17. A locking differential comprising: a case that is configured to be rotatable about an axis; a gearset received in the case, the gearset comprising a first side gear, a second side gear and a plurality of pinions that are configured to transmit rotary power between the case and at least one of the first and second side gears; a dog clutch that is selectively actuatable to control speed differentiation between the first and second side gears, the clutch comprising a first clutch member and a second clutch member that is coupled to the first side gear, wherein the first clutch member is axially movable along a translation axis that is coincident with the rotational axis between a first position and a second position, the first and second clutch members being engaged to one another when the first clutch member is in the first position, the first and second clutch members being disengaged from one another when the first clutch member is in the second position; an electromagnet comprising a shell member and a coil, the shell member being formed of a ferrous material and defining an annular cavity having a longitudinal axis that is disposed coincident with the translation axis, the shell member having an annular flange, which defines a first end of the annular cavity, and a circumferentially extending projection that extends axially concentric with the longitudinal axis from the annular flange, the circumferentially extending projection comprising a tapered surface, the coil having an annular shape and being received in the annular cavity; and an armature comprising an annular body portion that extends longitudinally about the translation axis, the annular body portion having a mating tapered surface; wherein actuation of the dog clutch is controlled through selective energization of the electromagnet, wherein the tapered surface and the mating tapered surface are configured to lie axially in-line with one another when the first clutch member is moved between the first and second positions, and wherein the tapered surface and the mating tapered surface are configured to lie radially in-line with one another when the first clutch member is in at least one of the first and second positions; and wherein the circumferentially extending projection is spaced radially apart from the coil and wherein at least a portion of the tapered face of the circumferentially extending projection is disposed radially in-line with the coil. 18. The locking differential of claim 17, wherein the electromagnet is fixed to the case and energization of the electromagnet is configured to move the armature. 19. The locking differential of claim 17, wherein the shell member comprises a tubular body that is coupled to a side of the annular flange opposite the circumferentially extending projection. 20. The locking differential of claim 17, wherein a second tapered surface is formed on the circumferentially extending projection on a side facing the annular cavity. 21. A locking differential comprising: a case that is configured to be rotatable about an axis; a gearset received in the case, the gearset comprising a first side gear, a second side gear and a plurality of pinions that are configured to transmit rotary power between the case and at least one of the first and second side gears; a dog clutch that is selectively actuatable to control speed differentiation between the first and second side gears, the clutch comprising a first clutch member and a second clutch member that is coupled to the first side gear, wherein the first clutch member is axially movable along a translation axis that is coincident with the rotational axis between a first position and a second position, the first and second clutch members being engaged to one another when the first clutch member is in the first position, the first and second clutch members being disengaged from one another when the first clutch member is in the second position; an electromagnet comprising a shell member and a coil, the shell member being formed of a ferrous material and defining an annular cavity having a longitudinal axis that is disposed coincident with the translation axis, the shell member having an annular flange, which defines a first end of the annular cavity, and a circumferentially extending projection that extends axially concentric with the longitudinal axis from the annular flange, the circumferentially extending projection comprising a tapered surface, the coil having an annular shape and being received in the annular cavity; and an armature comprising an annular body portion that extends longitudinally about the translation axis, the annular body portion having a mating tapered surface; wherein actuation of the dog clutch is controlled through selective energization of the electromagnet, wherein the tapered surface and the mating tapered surface are configured to lie axially in-line with one another when the first clutch member is moved between the first and second positions, and wherein the tapered surface and the mating tapered surface are configured to lie radially in-line with one another when the first clutch member is in at least one of the first and second positions; and wherein the circumferentially extending projection is spaced radially apart from the coil; wherein the electromagnet further comprises a housing that forms a generally U-shaped circumferentially extending channel with a radially inner wall member and a radially outer wall, the shell member being received into the generally U-shaped circumferentially extending channel between the radially inner wall and the radially outer wall. 22. The locking differential of claim 21, further comprising a sensor that is coupled to the housing, the sensor being configured to produce a sensor signal indicative of the relative positioning of the armature and the housing in at least one position. 23. A locking differential comprising: a case that is configured to be rotatable about an axis; a gearset received in the case, the gearset comprising a first side gear, a second side gear and a plurality of pinions that are configured to transmit rotary power between the case and at least one of the first and second side gears; a dog clutch that is selectively actuatable to control speed differentiation between the first and second side gears, the clutch comprising a first clutch member and a second clutch member that is coupled to the first side gear, wherein the first clutch member is axially movable along a translation axis that is coincident with the rotational axis between a first position and a second position, the first and second clutch members being engaged to one another when the first clutch member is in the first position, the first and second clutch members being disengaged from one another when the first clutch member is in the second position; an electromagnet comprising a shell member and a coil, the shell member being formed of a ferrous material and defining an annular cavity having a longitudinal axis that is disposed coincident with the translation axis, the shell member having an annular flange, which defines a first end of the annular cavity, and a circumferentially extending projection that extends axially concentric with the longitudinal axis from the annular flange, the circumferentially extending projection comprising a tapered surface, the coil having an annular shape and being received in the annular cavity; and an armature comprising an annular body portion that extends longitudinally about the translation axis, the annular body portion having a mating tapered surface; wherein actuation of the dog clutch is controlled through selective energization of the electromagnet, wherein the tapered surface and the mating tapered surface are configured to lie axially in-line with one another when the first clutch member is moved between the first and second positions, and wherein the tapered surface and the mating tapered surface are configured to lie radially in-line with one another when the first clutch member is in at least one of the first and second positions; wherein the circumferentially extending projection is spaced radially apart from the coil; and wherein the electromagnet further comprises a second shell member that is disposed on a side of the coil opposite the shell member, the second shell member having a cylindrical surface onto which the annular body portion is slidably engaged. 24. The locking differential of claim 17, wherein the coil is disposed on a side of the annular flange opposite the first clutch member and the gearset.
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이 특허에 인용된 특허 (75)
Bircann Raul Armando ; Palmer Dwight Orman ; Danahy Paul Francis, Actuator housing.
Paulos Louis B. (9616 Yolanda Ave. Northridge CA 91324) Huebsch Donald L. (3716 Prestwick Dr. Los Angeles CA 90027), Armature position monitoring and control device.
Diekhans Norbert,DEX ; Gorzond Ingo,DEX, Arrangement for and method of automatically controlling a differential lock in drive axles of a motor vehicle.
Bryant Robert Cooper (Honeoye Falls NY) O\Brien Michael Joseph (Rochester NY) Lee J. Kelly (Rochester NY), Electromagnetic actuator with movable coil and position sensor for drive coil.
Griesser Walter (Friedrichshafen DEX) Schreiner Friedrich (Kehlen-Reute DEX), Electromagnetically actuated locking clutch for differential gears of motor vehicles.
Blessing Martin G. (Fort Wayne IN) Heine Charles F. (New Haven IN) Pifer Richard L. (Fort Wayne IN), Locking differential with electromagnetic actuated clutch.
Graham Donald E. (Dayton OH) Wainwright Richard E. (Kettering OH) Foust Jeff A. (Farmersville OH) Denton Gary R. (Vandalia OH), Vehicle power antenna control with inhibit during cranking.
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