電磁駆動装置

Japanese Patent JP3975941

B2

An electromagnetic drive device for lineally reciprocatively moving an operating member like a spool of a spool valve is reduced in the manufacturing cost without being degraded in its operational performance. In the electromagnetic drive device, a stator body is excited by an electromagnetic coil to axially move a plunger guided in an inner bore of the stator body, against the resilient force of a spring. The stator body is constituted by arranging a plurality of core portion annular plate elements made of a magnetic material, a plurality of yoke portion annular plate elements made of a magnetic material and a plurality of non-magnetic portion annular plate elements made of a non-magnetic material and placed between the core portion annular plate elements and the yoke portion annular plate elements and by piling up and bodily joining these annular plate elements in axial alignment with one another. Each of the annular plate elements is provided with plural embossed portions each of which is half-blanked to be prominent at one surface side and hollow at the other surface side. The embossed portions formed on each annular plate element are fit at the prominent surface sides thereof respectively in the hollow surface sides of the embossed portions formed on another annular plate element, so that all the annular plate elements can be bodily joined in axial alignment with one another.

Masaya Segi
Mikio Suzuki
Koichi Takanishi
Masaru Suzuki
Kaneda

JP2003044940A

September 12, 2007

February 21, 2003

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JTEKT Corporation

H01F7/08; F16K31/06; H01F7/16; H01F41/02

JP50139964A
JP11251138A
JP2001517867A
JP2000243624A
JP9017630A
JP2001065726A
JP57121108U

Teruichi Hase
Mikio Takagi

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