IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0777471
(2001-02-06)
|
발명자
/ 주소 |
- Bircann, Raul A.
- Palmer, Dwight O.
|
출원인 / 주소 |
- Delphi Technologies, Inc.
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
19 |
초록
▼
An improved electric solenoid for providing linear mechanical actuation. The outer polepiece of the solenoid is provided with an axial, self-lubricated, non-magnetic bearing for closely supporting and centering an actuating shaft extending coaxially from the solenoid armature. Preferably, the radial
An improved electric solenoid for providing linear mechanical actuation. The outer polepiece of the solenoid is provided with an axial, self-lubricated, non-magnetic bearing for closely supporting and centering an actuating shaft extending coaxially from the solenoid armature. Preferably, the radial tolerance between the diameters of the bearing inner bore and the shaft is as small as in practically possible without inducing drag of the shaft in the bearing, permitting reduction of the air gap between the armature and the polepieces to a minimal thickness. Preferably, the armature is axially tapered to avoid contact of the armature with the polepieces as a result of residual tolerances between the bearing and shaft. A significant increase in actuating force is realized in comparison with a prior art solenoid, and the improved solenoid may be used in any desired orientation.
대표청구항
▼
1. A solenoid for providing linear actuation, comprising:a) first and second polepieces having axial bores coaxially disposed along a common axis;b) an electrical conductor wound about said polepieces in a plurality of turns;c) an armature movably disposed in said axial bores, wherein said armature
1. A solenoid for providing linear actuation, comprising:a) first and second polepieces having axial bores coaxially disposed along a common axis;b) an electrical conductor wound about said polepieces in a plurality of turns;c) an armature movably disposed in said axial bores, wherein said armature includes an outer surface, wherein at least a portion of said outer surface is frusto-conical, said frusto-conical portion of said outer surface being adjacent to a substantial portion of said first and second polepieces;d) a bearing axially retained in one of said first and second polepieces, said axial bore of said polepiece not retaining said bearing being non-frusto-conical; ande) a shaft attached coaxially to said armature and extending through a supportive bore in said bearing wherein said bearing radially supports said shaft, said shaft being axially displaceable by electromagnetic displacement of said armature to provide said actuation, wherein said armature is entirely separated from said axial bores of said polepieces by an air gap, and wherein the armature is prevented from contacting the polepieces.2. A solenoid in accordance with claim 1 wherein said solenoid is included in an actuator attachable to a device for providing linear actuation to said device.3. A valve assembly for exhaust gas recirculation between the exhaust manifold and the intake manifold of an internal combustion engine, said assembly including an exhaust gas recirculation valve and further including a solenoid actuator attached to said valve, said solenoid actuator having first and second polepieces having axial bores coaxially disposed along a common axis, an electrical conductor wound about said polepieces in a plurality of turns, an armature movably disposed in said axial bores, said armature including an outer surface, wherein at least a portion of said outer surface is frusto-conical, said frusto-conical portion of said outer surface being adjacent to a substantial portion of said first and second polepieces, a bearing axially retained in one of said first and second polepieces, said axial bore of said polepiece not retaining said bearing being non-frusto-conical, and a shaft attached coaxially to said armature and extending through a supportive bore in said bearing wherein said bearing radially supports said shaft, said shaft being axially displaceable by electromagnetic displacement of said armature to provide actuation of said valve, wherein said armature is entirely separated from said axial bores of said polepieces by an air gap, and wherein the armature is prevented from contacting the polepieces.4. A solenoid in accordance with claim 3 wherein said bearing has an axial length that is at least 1.5 times larger than the diameter of said shaft.5. An internal combustion engine, comprising:a) an intake manifold;b) an exhaust manifold; andc) a valve assembly for exhaust gas recirculation between said exhaust manifold and said intake manifold, said assembly including an exhaust gas recirculation valve and further including a solenoid actuator attached to said valve and having first and second polepieces having axial bores coaxially disposed along a common axis, an electrical conductor wound about said polepieces in a plurality of turns, an armature movably disposed in said axial bores, said armature including an outer surface, wherein at least a portion of said outer surface is frusto-conical, said frusto-conical portion of said outer surface being adjacent to a substantial portion of said first and second polepieces, a bearing axially retained in one of said first and second polepieces, said axial bore of said polepiece not retaining said bearing being non-frusto-conical, and a shaft attached coaxially to said armature and extending through a supportive bore in said bearing wherein said bearing radially supports said shaft, said shaft being axially displaceable by electromagnetic displacement of said armature to provide actuation of said valve to admit exhaust gas from said exhaust manifold into said intake manifold, wherein said armature is entirely separated from said axial bore of said polepieces by an air gap, and wherein the armature is prevented from contacting the polepieces.6. A solenoid in accordance with claim 5 wherein said bearing has an axial length that is at least 1.5 times larger than the diameter of said shaft.7. A solenoid for providing linear actuation, comprising:a) a housing;b) first and second polepieces, within said housing, having axial bores coaxially disposed along a common axis;c) an electrical conductor wound about said polepieces in a plurality of turns;d) an armature movably disposed in said axial bores, wherein said armature includes an outer surface, wherein at least a portion of said outer surface is frusto-conical, said frusto-conical portion of said outer surface being adjacent to a substantial portion of said first and second polepieces;e) a bearing axially retained in one of said first and second polepieces, said axial bore of said polepiece not retaining said bearing being non-frusto-conical; andf) a shaft attached coaxially to said armature and extending through a supportive bore in said bearing wherein said bearing radially supports said shaft, said shaft being axially displaceable by electromagnetic displacement of said armature to provide said actuation, wherein said armature is entirely separated from said axial bore of said polepieces by an air gap, and wherein the armature is prevented from contacting the polepieces.8. A solenoid in accordance with claim 7 wherein said solenoid is included in an actuator attachable to a device for providing linear actuation to said device.9. A solenoid in accordance with claim 7 wherein said bearing has an axial length that is at least 1.5 times larger than the diameter of said shaft.10. A solenoid for providing linear actuation, comprising:a) first and second polepieces having axial bores coaxially disposed along a common axis;b) an electrical conductor wound about said polepieces in a plurality of turns;c) an armature movably disposed in said axial bores;d) a bearing axially retained in one of said first and second polepieces; ande) a shaft attached coaxially to said armature and extending through a supportive bore in said bearing wherein said bearing radially supports said shaft, said shaft being axially displaceable by electromagnetic displacement of said armature to provide said actuation, wherein said armature is entirely separated from said axial bores of said polepieces by a generally cylindrical air gap, and wherein said bearing has an axial length that is at least 1.5 times larger than the diameter of said shaft.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.