ELECTROMAGNETIC ACTUATOR

• Main Authors: ARAO MASASHI, INOHARA TAKAYUKI, SANADA HARUHIRO, OE SHUHEI, ISOGAI SEIJI
• Format: Patent
• Language: English; Japanese
• Published: 11.05.2015
• Subjects: ACTUATING-FLOATS; BASIC ELECTRIC ELEMENTS; BLASTING; COCKS; CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES; DEVICES FOR VENTING OR AERATING; ELECTRICITY; ENGINE PLANTS IN GENERAL; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; INDUCTANCES; LIGHTING; MACHINES OR ENGINES IN GENERAL; MAGNETS; MECHANICAL ENGINEERING; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; STEAM ENGINES; TAPS; THERMAL INSULATION IN GENERAL; TRANSFORMERS; VALVES; WEAPONS

PROBLEM TO BE SOLVED: To provide an electromagnetic actuator capable of suppressing a malfunction of a plunger.SOLUTION: Capacity of a shortest passage part 68 which is a part along the shortest passage until reaching a storage chamber 55 from the outside of a breathing passage 65 is larger than capacity change quantity of the storage chamber 55 when a spool of a hydraulic control valve moves at the maximum in accordance with movement of a plunger 60 from an original position to the maximum stroke position. Thus, even when the capacity of the storage chamber 55 increases from the minimum value to the maximum value, the air or hydraulic oil to be sucked in the breathing passage 65 from the outside stops in the middle of the breathing passage 65 without reaching the storage chamber 55. Consequently, intrusion of foreign matter sucked with the air and the hydraulic oil in the storage chamber 55 can be avoided. Thus, an actuation of the plunger 60 is not inhibited by the foreign matter, and a malfunction of the plunger 60 can be suppressed. 【課題】プランジャの作動不良を抑制することができる電磁アクチュエータを提供する。【解決手段】呼吸通路６５のうち、外部から収容室５５に至るまでの最短経路に沿う部分である最短通路部６８の容積は、プランジャ６０が原位置から最大ストローク位置まで移動するのに伴って油圧制御弁のスプールが最大限移動するときの収容室５５の容積変化量よりも大きい。そのため、収容室５５の容積が最小値から最大値まで増える場合であっても、外部から呼吸通路６５に吸い込まれる空気または作動油は、収容室５５に到達することなく呼吸通路６５の途中で止まる。したがって、空気および作動油と共に吸い込まれた異物が収容室５５に侵入することを回避することができる。そのため、異物によりプランジャ６０の作動が阻害されることもなく、プランジャ６０の作動不良を抑制可能である。【選択図】図２