Combined linear-rotary stepping motor

A combined linear-rotary stepping motor comprising a stator including a stator iron core having a plurality of salient poles of two kinds disposed radially inward, said two kinds being alternately arranged in a circumferential direction, said salient poles of one kind having a plurality of first stator teeth formed in an inner peripheral surface thereof in the shaft direction, said salient poles of the other kind having a plurality of second stator teeth formed in an inner peripheral surface thereof in the circumferential direction and a mover including a mover iron core supported within said stator movably in the shaft direction and rotatably in the rotation direction and having a plurality of mover teeth formed in an outer peripheral surface thereof at an equal pitch in the shaft direction and the circumferential direction in opposing relation to said first and second stator teeth,

• said stator iron core being defined by punched iron plates formed by a punching mold while controlling to selectively push out and withdraw movable punches included within said punching mold and disposed to be able to be pushed out and withdrawn in each of said salient poles by a punch controller, said punched iron plates being laminated successively so that the tips of said salient poles constitute tooth tops or tooth bottoms of said first stator teeth at a predetermined period for each punching of said iron plates in order to form said first stator teeth in the inner peripheral surface of said salient poles in the shaft direction.

A combined linear-rotary stepping motor comprising a stator including a stator iron core having a plurality of salient poles of two kinds disposed radially inward, said two kinds being alternately arranged in a circumferential direction, said salient poles of one kind having a plurality of first stator teeth formed in an inner peripheral surface thereof in the shaft direction, said salient poles of the other kind having a plurality of second stator teeth formed in an inner peripheral surface thereof in the circumferential direction and a mover including a plurality of mover iron cores supported within said stator movably in the shaft direction and rotatably in the rotation direction by means of a shaft and disposed in the shaft direction, said mover iron cores including two kinds of first and second mover iron cores, said first mover iron cores including a plurality of first mover teeth formed in an outer peripheral surface thereof at an equal pitch in the shaft direction in opposing reaction to said first stator teeth, said second mover iron cores including a plurality of second mover teeth formed in an outer peripheral surface thereof at an equal pitch in the circumferential direction in opposing relation to said second stator teeth,

• said stator iron core including first stator teeth defined in the shaft direction with a tooth pitch of cmt.sub.0 by cm kinds of stator iron plates which are successively and repeatedly laminated so as to constitute said stator iron core and having tips of salient poles formed into different shapes with respect to a plane coordinate axis when the number of phases of a linear motor portion is m, k sets of salient poles each set constituted by cm salient poles having said first stator teeth shifted with respect to said first stator teeth of a certain salient pole by (d/2m)cmt.sub.0 in the movement direction of said mover in ckm stator salient poles having said first stator teeth formed, where c=1 when m is an odd number, c=2 when m is an even number, t.sub.0 is a thickness of said iron plate, k is an integer equal to or larger than 1, and d is (cm-1) different integers satisfying 1.ltoreq.d.ltoreq.2m-1.

A combined linear-rotary stepping motor comprising a stator including a stator iron core having a plurality of salient poles of two kinds disposed radially inward, said two kinds being alternately arranged in a circumferential direction, said salient salient poles of one kind having a plurality of first stator teeth formed in an inner peripheral surface thereof in the shaft direction, said salient poles of the other kind having a plurality of second stator teeth formed in an inner peripheral surface thereof in the circumferential direction and a mover including a plurality of mover iron cores supported within said stator movably in the shaft direction and rotatably in the rotation direction by means of a shaft and disposed in the shaft direction, said mover iron cores including two kinds of first and second mover iron cores, said first mover iron cores including a plurality of first mover teeth formed in an outer peripheral surface thereof at an equal pitch in the shaft direction in opposing relation to said first stator teeth, said second mover iron cores including a plurality of second mover teeth formed in an outer peripheral surface thereof at an equal pitch in the circumferential direction in opposing relation to said second stator teeth,

• said stator iron core being defined by laminated stator iron plates including said salient poles constituting tooth tops of said first stator teeth and said salient poles constituting tooth bottoms of said teeth, both of said salient poles being disposed in a predetermined relation, while successive ones of said stator iron plates being rotationally displaced from one another by a predetermined angle determined by the number of phases, the number of salient poles and the predetermined relation so that said first stator teeth are formed in the inner peripheral surface of said salient pole in the shaft direction, tooth tops and tooth bottoms of said second stator teeth being defined by successively laminated stator iron plates which are rotationally displaced from one another by said predetermined angle.

A combined linear-rotary stepping motor comprising a stator including a stator iron core having a plurality of salient poles of two kinds disposed radially inward, said two kinds being alternately arranged in a circumferential direction, said salient poles of one kind having a plurality of first stator teeth formed in an inner peripheral surface thereof in the shaft direction, said salient poles of the other kind having a plurality of second stator teeth formed in an inner peripheral surface thereof in the circumferential direction and a mover including a plurality of mover iron cores supported within said stator movably in the shaft direction and rotatably in the rotation direction by means of a shaft and disposed in the shaft direction, said mover iron cores including two kinds of first and second mover iron cores, said first mover iron cores including a plurality of first mover teeth formed in an outer peripheral surface thereof at an equal pitch in the shaft direction in opposing relation to said first stator teeth, said second mover iron cores including a plurality of second mover teeth formed in an outer peripheral surface thereof at an equal pitch in the circumferential direction in opposing relation to said second stator teeth,

• said stator iron core being defined by punched iron plates formed by a punching mold while controlling to selectively push out and withdraw movable punches included within said punching mold and disposed to be able to be pushed out and withdrawn in each of said salient poles by a punch controller so that the tips of said salient poles constitute tooth tops or tooth bottoms of said first stator teeth at a predetermined period for each punching of said iron plates, said punched iron plates being laminated successively in order to form said first stator teeth in the inner peripheral surface of said salient poles in the shaft direction.