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AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsAkira Hashimoto, Yasuki Kimura, Yuji Nakahara, Akira Watarai, Shoichiro Nishitani
Estimating the term…
A linear motor comprises a stator including a stator yoke and a plurality of permanent magnets arranged side by side on the stator yoke along a motor running direction in alternately reversed directions to produce alternating polarities, and a moving part including a plurality of magnetic teeth arranged along the motor running direction and coils wound around the individual magnetic teeth. Cutouts formed in end surfaces of yoke portions of the individual magnetic teeth opposite to their side facing the stator line up to form a groove-shaped channel running through the yoke portions of the successive magnetic teeth, and the multiple magnetic teeth are joined together into a single structure by fitting a connecting bar in the groove-shaped channel.
A linear motor comprising:
A linear motor comprising:
A linear motor comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Backward citations are indexed for grants only.
Linear motors; Sectional motors: synchronous motors; Motors moving step by step; Reluctance motors
Stationary parts of the magnetic circuit: means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
Dynamo-electric machines
Term end not estimated
1. Field of the Invention
The present invention relates to a linear motor. More particularly, the invention pertains to a linear motor used in a table feed mechanism of a machine tool.
2. Description of the Background Art
FIGS. 1A-1B are diagrams showing the construction of a linear motor according to a first embodiment of the invention, in which FIG. 1A is a plan view and FIG. 1B is a cross-sectional side view;
FIG. 2 is a front view of the linear motor of FIGS. 1A-1B;
FIG. 3 is a plan view showing how magnetic teeth of the linear motor are successively arranged;
Preferred embodiments of the invention are now described with reference to the appended drawings.
First Embodiment
FIGS. 1A-1B are diagrams showing the construction of a linear motor according to a first embodiment of the invention, in which FIG. 1A is a plan view and FIG. 1B is a cross-sectional side view. FIG. 2 is a front view of the linear motor of FIGS. 1A-1B, FIG. 3 is a plan view showing how magnetic teeth 25 of the linear motor are successively arranged, FIG. 4 is a front view showing how the magnetic teeth 25 are joined into a single structure by means of connecting bars 27, FIG. 5 is a front view showing how the connecting bars 27 are welded to the magnetic teeth 25, FIG. 6 is a plan view showing an assembly of the magnetic teeth 25 upon completion of a welding process shown in FIG. 5, and FIG. 7 is a diagram showing details of how each connecting bar 27 is welded to the magnetic teeth 25.