IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0396620
(2012-02-15)
|
등록번호 |
US-8456262
(2013-06-04)
|
우선권정보 |
JP-2011-031527 (2011-02-17); JP-2011-270025 (2011-12-09) |
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
4 |
초록
▼
An electromagnetic solenoid includes first and second stators arranged at two axial end sides of a coil. The first stator includes an annular radial core part, an axial core part cylindrically extending from an inner end of the radial core part toward the second stator, and a core corner part having
An electromagnetic solenoid includes first and second stators arranged at two axial end sides of a coil. The first stator includes an annular radial core part, an axial core part cylindrically extending from an inner end of the radial core part toward the second stator, and a core corner part having an outer corner surface at an intersection of the radial and axial core parts. A plunger guide includes a cylindrical sleeve inward of the stators, a flange extending radially outward from the sleeve along a side of the radial core part opposed to the coil, and a plunger-guide corner part having an inner corner surface at an intersection of the sleeve and the flange. The outer and inner corner surfaces of the core corner part and the plunger-guide corner part abut on each other in a contact portion linearly or in area along an entire circumference.
대표청구항
▼
1. An electromagnetic solenoid comprising: a coil which generates magnetic force by energization;a cylindrical yoke covering an outer circumference of the coil and extending in an axial direction of the coil;first and second stators which are arranged around the coil to configure a magnetic circuit
1. An electromagnetic solenoid comprising: a coil which generates magnetic force by energization;a cylindrical yoke covering an outer circumference of the coil and extending in an axial direction of the coil;first and second stators which are arranged around the coil to configure a magnetic circuit around the coil together with the yoke, the first and second stators being magnetized by the energization of the coil to configure an electromagnet;a plunger guide arranged radially inward of the first and second stators; anda plunger inserted into the plunger guide to be slidably movable in the axial direction of the coil and to be attracted by magnetic force of the electromagnet, whereinthe first stator is arranged at one end side of the coil in the axial direction of the coil, and the second stator is arranged at the other end side of the coil in the axial direction of the coil,the first stator includes: an annular radial core part arranged perpendicularly to the axial direction of the coil and extending in a radial direction of the coil;an axial core part cylindrically extending from an inner diametrical end of the radial core part toward the second stator at a position radially inward of the coil; anda core corner part provided at an intersection portion of the radial core part and the axial core part, and having an of outer corner surface, the plunger guide includes:a cylindrical sleeve which is arranged radially inward of the first and second stators and extends in the axial direction of the coil to hold the plunger slidably;a flange which extends radially outward from an end part of the cylindrical sleeve and is located at a side of the radial core part of the first stator opposed to the coil in the axial direction of the coil; anda plunger-guide corner part provided at an intersection portion of the cylindrical sleeve and the flange, and having an inner corner surface, andthe outer corner surface of the core corner part and the inner corner surface of the plunger-guide corner part abut on each other in a circular contact portion linearly or in area along an entire circumference;wherein an inner circumferential surface of the yoke has a step surface that is opposed to a surface of the radial core part on a side of the coil in the axial direction of the coil,the step surface and the surface of the radial core part hold a magnetic member therebetween, andthe yoke and the radial core part are magnetically coupled with each other through the magnetic member. 2. The electromagnetic solenoid according to claim 1, wherein both the outer corner surface of the core corner part and the inner corner surface of the plunger-guide corner part are corner-cut flat surfaces parallel to each other, and contact in the circular contact portion in area along the entire circumference. 3. The electromagnetic solenoid according to claim 1, wherein both the outer corner surface of the core corner part and the inner corner surface of the plunger-guide corner part are circular arc surfaces, andthe inner corner surface of the plunger-guide corner part is larger in curvature than the outer corner surface of the core corner part, and contacts the outer corner surface of the core corner part in the circular contact portion linearly along the entire circumference. 4. The electromagnetic solenoid according to claim 1, wherein the flange of the plunger guide and the radial core part define a gap therebetween in the axial direction of the coil, andthe flange is urged toward the radial core part from a side surface of the flange opposed to the radial core part in the axial direction of the coil. 5. The electromagnetic solenoid according to claim 1, wherein the flange of the plunger guide and the radial core part define a gap therebetween in the axial direction, andan outer diametrical side part of the flange is pressed from a side of the flange opposed to the radial core part in the axial direction of the coil, and pressed against an end surface of the radial core part, so that the flange is resiliently deformed. 6. An electromagnetic solenoid comprising: a coil which generates magnetic force by energization:a cylindrical yoke covering an outer circumference of the coil and extending in an axial directional of the coil;first and second stators which are arranged around the coil to configure a magnetic circuit around the coil together with the yoke, the first and second stators being magnetized by the energization of the coil to configure an electromagnet;a plunger guide arranged radially inward of the first and second stators anda plunger inserted into the plunger guide to be slidably movable in the axial direction of the coil and to be attracted by magnetic force of the electromagnet, whereinthe first stator is arranged at one end side of the coil in the axial direction of the coil, and the second stator is arranged at the other end side of the coil in the axial direction of the coil,the first stator includes: an annular radial core part arranged perpendicularly to the axial direction of the coil and extending in a radial direction of the coil;an axial core part cylindrically extending from an inner diametrical end of the radial core part toward the second stator at a position radially inward of the coil; anda core corner part and provided at an intersection portion of the radial core part and the axial core part, and having an of outer corner surface,the plunger guide includes: a cylindrical sleeve which is arranged radially inward of the first and second stators and extends in the axial direction of the coil to hold the plunger slidably;a flange which extends radially outward from an end part of the cylindrical sleeve and is located at a side of the radial core part of the first stator opposed to the coil in the axial direction of the coil; anda plunger-guide corner part provided at an intersection portion of the cylindrical sleeve and the flange, and having an inner corner surface, andthe outer corner surface of the core corner part and the inner corner surface of the plunger-guide corner part abut on each other in a circular contact portion linearly or in area along an entire circumference;wherein one of the outer corner surface of the core corner part and the inner corner surface of the plunger-guide corner part is a corner-cut flat surface, andthe other one of the outer corner surface of the core corner part and the inner corner surface of the plunger-guide corner part is a circular arc surface, and the outer corner surface of the core corner part and the inner corner surface of the plunger-guide corner part contact in the circular contact portion linearly along the entire circumference. 7. An electromagnetic solenoid comprising: a coil which generates magnetic force by energization;a cylindrical yoke covering an outer circumference of the coil and extending in an axial direction of the coil;first and second stators which are arranged around the coil to configure a magnetic circuit around the coil together with the yoke, the first and second stators being magnetized by the energization of coil to configure an electromagnet;a plunger guide arranged radially inward of the first and second stators; anda plunger inserted into the plunger guide to be slidably movable in the axial direction of the coil and to be attracted by magnetic force of the electromagnet, whereinthe first stator is arranged at one end side of the coil in the axial direction of the coil, and the second stator is arranged at the other end side of the coil in the axial of the coil,the first stator includes: an annular radial core part arranged perpendicularly to the axial direction of the coil and extending in a radial direction of the coil:an axial core part cylindrically extended from an inner diametrical end of the radial core part toward the second stator at a position radially inward of the coil; anda core corner provided at an intersection portion of the radial core part and the axial core part, and having an of outer corner surface,the plunger guide includes: a cylindrical sleeve which extends arranged radially inward of the first and second stator and extends in the axial direction of the coil to hold the plunger sldably;a flange which extends radially outward from an end part of the cylindrical sleeve and is located at a side of the radial core part of the first stator opposed to the coil in the axial direction of the coil; anda plunger-guide corner part provided at an intersection portion of the cylindrical sleeve and the flange, and having an inner corner surface, andthe outer corner surface of the core corner part and the inner corner surface of the plunger-guide corner part abut on each other in a circular contact portion linearly or in area along an entire circumference;the flange of the plunger guide and the radial core part define a gap therebetween in the axial direction of the coil;the flange is urged toward the radial core part from a side surface of the flange opposed to the radial core part in the axial direction of the coil; andthe side surface of the flange opposed to the radial core part in the axial direction of the coil is coupled with an O-ring, and the flange of the plunger guide is urged toward the radial core part by elastic force of the O-ring.
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