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Patent Searching and Data

Document Type and Number:
Japanese Patent JPH02303343
Kind Code:

PURPOSE: To obtain straight forward movement by means of the title motor only by providing a nut section to be engaged with a fixed screw shaft on the inside wall of a rotor which is freely rotatable against the screw shaft.

CONSTITUTION: A nut section 3, with which a screw shaft 1 can be engaged freely, is formed on the inside wall of the central hole 10 of the larger-diameter section W of a rotor 2. The end section of the screw shaft 1 is mounted on the central part of a fixing plate 8 fixed to one end face of a stator 5 in an un-rotatable state. The smaller-diameter section N and larger-diameter section W of the rotor 2 are previously set to required lengths by taking the moving distance of the rotor 2 in the thrust direction into account. When this motor is operated and the rotor 2 rotates, the nut section 3 provided in the central hole section 10 is engaged with the shaft 1. However, since the shaft 1 is fixed to the fixing plate 8 in the un-rotatable state, the rotor moved forward as it rotates while it is supported by the shaft 1. Therefore, straight forward movement can be obtained with this motor only.

Okabe, Tadashi
Application Number:
Publication Date:
December 17, 1990
Filing Date:
May 17, 1989
Export Citation:
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International Classes:
H02K7/06; (IPC1-7): H02K7/06