JP3432295B2 - Linear / rotary combined stepping motor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear rotary composite type stepping motor.

[0002]

2. Description of the Related Art Conventionally, as a motor of this type, a cylindrical three motor is used in U.S. Pat. No. 5,093,596 (Title of the invention: Combined linear rotary direct drive step motor).
Phase VR type linear pulse motor part and hybrid type 3
It is disclosed that a phase rotary step motor part or a VR type three-phase rotary step motor part is arranged side by side in the axial direction, and the output shafts are commonly housed in one housing.

However, these have the following drawbacks.

(1) Since the linear motor portion and the rotary motor portion are arranged side by side in the axial direction, the length in the axial direction becomes long.

(2) The stator of the linear motor section is
The stator iron plates and the spacer iron plates are alternately laminated, and when manufacturing the stator core, two types of iron plates must be alternately laminated, and the stator iron plates are each salient poles. It is necessary to bend every other tip of the stator, so that the stator core cannot be easily manufactured.

(3) Three types of iron plates are required: the stator iron plate of the rotary motor part, the stator iron plate of the linear motor part, and the spacer iron plate.

(4) Two stators of the linear motor section and the stator of the rotary motor section are required, and after the winding and connecting work are performed separately, the two stators are combined in the axial direction. Since it is necessary, the workability of assembling the entire motor is poor.

For this reason, a linear rotary composite type stepping motor which solves these drawbacks has been already proposed by the present inventor and is disclosed as follows.

That is, there are a plurality of salient poles radially arranged toward the inside, and the salient poles are provided on the inner peripheral surface thereof.
A stator having two types of salient poles having a plurality of first stator small teeth formed in the axial direction and salient poles having a plurality of second stator small teeth formed in the circumferential direction. A stator having an iron core,
The stator is movably supported in the axial direction and rotatably in the rotation direction, and has an outer peripheral surface facing the first and second stator small teeth in the axial direction and the circumference. A linear-rotary composite stepping motor comprising a mover having a mover iron core in which a plurality of mover small teeth are formed at equal pitches in each direction, and is as follows.

In order to form the first stator small teeth on the inner peripheral surface of the salient pole in the axial direction, the stator core has a salient pole portion and a tooth bottom portion forming a tooth tip portion of the small tooth. And a salient pole portion forming a stator iron plate, which are arranged in a predetermined manner, are rotationally laminated at a predetermined angle determined by the number of phases, the number of salient poles, and the predetermined arrangement. (Japanese Patent Application No. 5-290176)

[0011]

However, the linear rotary composite type stepping motor having the above structure has the following problems.

(1) On the outer peripheral surface of the mover iron core, a plurality of mover small teeth are formed facing the first and second stator small teeth at equal pitches in the axial direction and the circumferential direction, respectively. Due to this structure, it is difficult to manufacture the mover core by a method other than stacking two types of mover iron plates, for example, by machining such as cutting.

(2) When the axial length of the mover core is divided into the linear motor portion and the rotary motor portion,
Since the mover small teeth are evenly arranged in the axial direction and the circumferential direction, they are set to have substantially the same length. That is, the ratio of the linear motor section to the rotary motor section of the mover cannot be set arbitrarily.

The present invention has been made in view of the above points.
The purpose is to eliminate the above-mentioned problems, to make the stator iron plate common, and to set the ratio of the linear motor part and the rotary motor part of the mover arbitrarily, and to make the linear motor excellent in assembly workability of the entire motor. It is to provide a rotary composite type stepping motor.

[0015]

The structure of the present invention for solving the above-mentioned problems is a plurality of salient poles arranged radially inward, and the salient poles have inner circumferential surfaces. And a salient pole having a plurality of first stator small teeth formed in the axial direction and a salient pole having a plurality of second stator small teeth formed in the circumferential direction. A stator having a stator iron core, and a plurality of movers axially movable and axially supported by a shaft in the stator and arranged in the axial direction. A first mover iron core, which is an iron core and has a plurality of first mover small teeth formed on the outer peripheral surface thereof so as to face the first stator small teeth at an equal pitch in the axial direction, There are two types: a second stator core in which a plurality of second stator small teeth are formed at equal pitches in the circumferential direction facing the second stator small teeth. A combined linear-rotary stepping motor comprising a movable element, is as further described below.

[0016] Before SL stator core, when the number of phases of a linear motor portion is m, with axially said first stator teeth of the tooth pitch cmt ₀ is formed, the first fixed between ckm number of said stator salient poles child small teeth are formed,
If relative to the first stator teeth of a certain salient pole, is the first stator teeth of other of said salient poles deviation of (d / 2m) cmt ₀ in the movement direction of the mover A linear roll is formed in which k sets of salient poles, each of which is one of the generated cm salient poles, are formed .
It is a rotary composite type stepping motor .

However, c is c = 1, m when m is an odd number.
Is an even number, c = 2, t ₀ is the thickness of the iron plate, and k is
An integer of 1 or more, d satisfies 1 ≦ d ≦ 2m−1 (cm
-1) Let them be different integers.

In the stator, m is a linear motor unit and
Number of each phase of rotary motor part, k is an integer of 1 or more
When, and arranged at an equal pitch angle toward the inside
It has 2 km of the salient poles, and the salient poles are axially aligned with the first pole.
No. 1 stator salient pole is formed, and
Two stator small teeth and salient poles formed with them were arranged alternately
The stator iron core and the tooth pin of the first stator small tooth in the axial direction.
A plurality of the first moving elements with a tooth pitch corresponding to the switch.
In the circumferential direction, the first mover iron core with teeth is formed.
Zr number of the second mover small teeth formed on the second
Inside the mover core and the pair of first and second mover cores
And a permanent magnet that is sandwiched between and magnetized in the axial direction,
The first magnet which is magnetized to the N pole and the S pole by the permanent magnet
The number of the first and second moving iron cores is the same, and
In addition, the number of teeth Zr of the second mover small teeth satisfies the following relationship.
Combined linear / rotary composite step
It is a ping motor.

Zr = k (mb + a), where b is 1 or less
The above integer, a satisfies 1 ≦ a <2m when m is an even number
It is an odd number, and when m is an odd number, 1 ≦ a <m or m ≦ a <
It is an integer that satisfies 2 m.

The moving element is for a linear motor.
For the first mover iron core and a rotary motor
Of one of the second mover iron cores
Two pairs of moving element cores are used as a pair of moving element cores, and the pair of moving elements
Move the iron core vertically with respect to the axial center of the mover.
The pair of mover irons are arranged symmetrically with respect to the shaft.
A permanent magnet is sandwiched between the cores and magnetized in the axial direction.
It is a linear rotary compound type stepping motor
It

In the stator, m is the phase of the linear motor unit.
Number, n is the number of phases of the rotary motor,
Having 2 (m + n) salient poles previously arranged,
The salient pole is a phase in which the first stator small teeth are formed in the axial direction.
Circumferential direction with m pairs of salient pole pairs consisting of two adjacent salient poles
The two adjacent stator small teeth are formed on the two adjacent
It has a stator core consisting of n pairs of salient pole pairs consisting of salient poles.
This is a linear / rotary combined stepping motor.

[0022]

[0023]

[0024]

The linear / rotary composite type stepping motor configured as described above has a first mover iron core having a plurality of first mover small teeth formed on the outer peripheral surface at equal pitches in the axial direction, A configuration having two types of second mover cores in which second mover small teeth are formed at equal pitches in the circumferential direction, or one mover core has a plurality of first mover cores at equal pitches in the axial direction.
Since the portion in which the mover small teeth are formed and the portion in which the plurality of second mover small teeth are formed at the same pitch in the circumferential direction are arranged in the axial direction, the cutting work, etc. Manufacturing by machining is facilitated, and the lengths of the two types of mover iron cores or the lengths of the two types of portions can be arbitrarily set. In other words, the ratio of the linear motor section to the rotary motor section of the mover can be set arbitrarily.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be exemplarily described in detail below with reference to the drawings. FIG. 1 shows the linear
FIG. 2 and FIG. 3 are longitudinal sectional views showing an embodiment of a rotary composite type stepping motor, and FIG. 2 and FIG. 3 are transverse sectional views taken along line II-II and line III-III of FIG. 1, respectively.

In the stepping motor of this embodiment, the number of phases m and the numerical values of integers k, b and a are m = 5, k = 1, b =
14, a = 2, so the number of salient poles is 2 km = 10, and the number of small teeth Zr = k (mb + a) = 72 of the moving element in the circumferential direction.

1 to 3, ten salient poles 11, 12, 13, 14, 15, 15, 16, 17, 1 radially arranged inwardly on the stator core 10 of the stator 1 are shown in FIGS.
Of the 8, 19, 20 salient poles 11, 13, 15, 17,
A plurality of first stator small teeth 24 are axially formed on the inner peripheral surface of 19.
A plurality of second stator small teeth 25 are circumferentially formed on the inner peripheral surfaces of the salient poles 12, 14, 16, 18, and 20 (tooth tips 24a, tooth bottoms 24b) at equal pitches. (Tooth tip 25
a, the tooth tips 25b) are formed at equal pitches. Further, stator windings W1, W2, W3, ... W10 are separately wound around the salient poles 11, 12, 13 ,.

The stator 1 is supported by the end brackets 3 and 4 by being screwed with screws (not shown). On the other hand, the mover 2 in the stator 1 is supported by the end brackets 3 and 4 via the bearings 5 and 6 so as to be movable in the axial direction and also rotatable in the rotating direction. The moving element 2 includes a plurality of first moving element small teeth 27 (tooth tips 27 on the shaft 21 at equal pitches in the axial direction).
a, a first mover iron core 22a for a linear motor in which tooth tips 27b) are formed, and Zr second mover small teeth 28 (tooth tips 28a, tooth tips) at equal pitches in the circumferential direction. 28b) is formed integrally with the second mover iron core 22c for a rotary motor, and the other first,
A pair of second moving iron cores 22b and 22d are integrally formed, and the pair of iron cores are symmetrically arranged and fixed, and are sandwiched between the pair of iron cores in the axial direction. A magnetized ring-shaped permanent magnet 23 is disposed and fixed.

That is, the first mover iron core 22a,
On the outer peripheral surface of 22b, a plurality of first mover small teeth 27 (tooth tip portion 27a, tooth tip portion 27b) are arranged at an equal pitch in the axial direction facing the first stator tooth teeth 24. Are formed on the outer peripheral surfaces of the second mover iron cores 22c and 22d so as to face the second stator small teeth 25 at equal pitches in the circumferential direction, and Zr second second stator cores 22c and 22d are formed. The mover small teeth 28 (tips 28a, 28b) are formed. For this reason,
The first and second mover iron cores 22a and 22c or the other first and second mover iron cores 22b and 22d may be respectively formed in one mover iron core or separately formed iron cores. May be integrally formed by adhesion or the like.

FIG. 4 shows the first and second mover small teeth 27 and 28 formed on the outer peripheral surfaces of the first and second mover cores 22a, 22b and 22c, 22d of the mover core. It is a development view of the state (shape) as seen from the side of the stator 1. Hatched portions show tooth tips 27a and 28a, and unhatched portions show tooth bottoms 27b and 28b. The tooth pitch angle τ in the circumferential direction of the second movable child teeth 28 is τ = (3
60 / Zr), and the two second mover iron cores 22c and 22d facing each other with the permanent magnet 23 sandwiched therebetween are combined by being displaced from each other by τ / 2 in the circumferential direction. .

As can be seen from FIG. 1, the axial length of the permanent magnet 23 arranged on the moving element 2 is the first movement provided on the first moving element core 22a. The child small teeth 27 and the first mover small teeth 27 arranged on the other first mover iron core 22b are axially tooth pitch τ _0.
It is set to deviate by 1/2. That is, the addendum portions 27a of the first mover small teeth 27 disposed on the first mover iron core 22a are replaced by the addendum portions 24 of the stator small teeth 24.
When facing the a, the other first moving iron core 22
tooth tip portion 27 of the first movable child small tooth 27 disposed at b.
The a is opposed to the tooth bottom portion 24b of the stator small tooth 24.

FIG. 5 is a perspective view showing the shape of the iron core of the mover 2. That is, the second mover iron cores 22c, 22d in which the second mover small teeth 28 are formed in the circumferential direction.
And the first mover iron cores 22a and 22b formed with the first mover small teeth 27 in the axial direction are arranged in the axial direction.

FIG. 6 is a vertical sectional view showing another example of the iron core of the moving element 2. In FIG. 6, two first mover iron cores 22a, 22b each having a plurality of first mover small teeth 27 formed in the axial direction, and two first mover iron cores 22a , 22b, and a permanent magnet 23a magnetized in the axial direction constitutes a linear motor moving part, and a plurality of second moving small teeth 28 are formed in the circumferential direction. Two second mover iron cores 22c and 22d, and two second mover iron cores 22
The rotary motor moving part is constituted by the permanent magnet 23b which is sandwiched between c and 22d and is magnetized in the axial direction.
The linear motor moving element and the rotary motor moving element are arranged and fixed on the shaft 21, and the shaft 21 is sandwiched by a spacer 29 made of a non-magnetic material.
It is located above.

FIGS. 7 (a) and 7 (b) show an example of the stator iron plate 30 forming the stator core 10. FIG. 7 (b) is a portion A of FIG. 7 (a). FIG.
In FIG. 7A, the salient pole portions P5 and P of the stator iron plate 30 are
Reference numeral 9 is a salient pole portion having a small inner radius, which is the first axial portion.
3 is a salient pole portion forming a tooth tip portion 24a of the stator small tooth 24 of FIG. The salient pole portions P1, P3, and P7 are salient pole portions having a large inner radius dimension, and are salient pole portions forming the tooth bottom portion 24b of the first stator small tooth 24 in the axial direction. Salient poles P2, P
4, P6, P8, and P10 are salient pole portions forming the second stator small teeth 25 in the circumferential direction, and each salient pole portion P2, P4,
The center lines of P6, P8, and P10 are circumferential (360 / k
m), i.e., 72 degrees, at equal pitches, and each of the salient pole portions has six second stator small teeth 25.
Are arranged symmetrically with respect to the center line of each salient pole portion.

FIG. 8 shows that each stator iron plate 30 is rotated twice, that is, twice the equal pitch angle (72 degrees) of the salient pole portions P2, P4, P6, P8 and P10, that is, 144 degrees each. Salient poles 11, 12, 1 formed when laminated
3, ... 20 first and second stator teeth 24, 25
3 is a development view of the state (shape) of FIG. The hatched portions indicate the tooth tips 24a and 25a, and the non-hatched portions indicate the tooth bottom portions 24b, 25b.

By the way, the number of small teeth Zr of the mover 2 in the circumferential direction of the second mover iron cores 22c and 22d is Zr.
Is Zr = k (mb + a), where b is an integer of 1 or more,
a is an odd number that satisfies 1 ≦ a <2m when m is an even number, and is an integer that satisfies 1 ≦ a <m or m <a <2m when m is an odd number. , The salient pole portions P2, P4, P6, P8, P10 of the stator iron plate 30 having the second stator small teeth 25 in the circumferential direction can be evenly arranged as described above, and therefore the angle is an integral multiple of 72 degrees. With this, rotary lamination becomes possible.

Then, the second stator small teeth 25 of the salient pole 12
Is exactly opposite to the rotor small tooth 26 in the circumferential direction,
The second stator small teeth 25 of the salient poles 14 are offset by 2/5 of the tooth pitch τ with respect to the mover small teeth 26, and the second stator small teeth 25 of the salient poles 16 are 4 / of the tooth pitch τ. 5 offset, salient pole 1
The second stator small tooth 25 of No. 8 is displaced by 6/5 of the tooth pitch τ, that is, 1/5, and the second stator small tooth 25 of the salient pole 20 is
Is 8/5 of the tooth pitch τ, that is, 3/5. Therefore, as shown in FIG. 9, the stator winding W2 is the A phase, the stator winding W8 is the B phase, the stator winding W4 is the C phase, and the stator winding W1.
0 is the D phase and the stator winding W6 is the E phase, the basic step angle is 1/10 of the tooth pitch τ, that is, 0.
A 5-degree rotary 5-phase stepping motor can be constructed.

Further, the thickness of the stator iron plate 30 is set to t ₀ , and the iron plates 30 are rotationally laminated at 144 degrees as described above, so that the stator salient poles 11, 13,
15, 17, 19 are formed with first axial stator small teeth 24 having an axial tooth pitch of m · t _0, that is, 5t ₀ and a tooth tip 24a having a tooth thickness of 2t ₀ . Moreover, when the salient pole 11 is used as a reference, the deviation of the first stator small teeth 24 of the salient pole 13 is 2/5 of the tooth pitch, and the deviation of the small tooth 24 of the salient pole 15 is 4/5 of the tooth pitch. The shift of the small teeth 24 of the salient pole 17 is 6/5, that is, 1/5 of the tooth pitch, and the shift of the small teeth 24 of the salient pole 19 is 8/5, that is, 3/5 of the tooth pitch. Therefore, as shown in FIG. 9, the stator winding W1 is A phase, the stator winding W7 is B phase, the stator winding W3 is C phase, the stator winding W9 is D phase, and the stator winding W5 is E. with phase, it can be constructed of a basic amount of movement t _0/2 linear five-phase stepping motor.

Therefore, a linear / rotary composite type five-phase stepping motor can be constructed, and each of them can be individually driven and controlled.

Further, the stator core 10 may be formed as follows instead of the stator iron plates 30 being rotationally laminated by 144 degrees. That is, FIG.
(E) shows salient pole portions P1, P3, P5, P7, in which the first stator small teeth 24 are formed in the axial direction of the stator core 10.
Stator iron plates 30a, 30b, 30c, 30 having P9
3 shows an example of d and 30e. Here, the salient pole portion P
Second stator small teeth 25 are formed in the circumferential direction on each of P2, P4, P6, P8, and P10. Figure 10
In (a) to (e), the stator iron plates 30a, 30b,
... 30e of the salient pole portions P1, P3, P5, P7, P
The tip of 9 is built into a punching die (not shown), and a movable punch provided so as to be retractable for each salient pole portion P1, P3 ,. ), (B), (c), (d), (e), (a),
(B), (c) ... Punched in a cyclically repeating order so as to have the shape shown in FIG.
3, ... A tip portion 24a or a tooth bottom portion 24b of the first stator small tooth 24 is formed at the tip of P9.

The stator iron plate 30a shown in FIG.
When the movable punches 5 and 9 related to the salient pole portions P5 and P9 are inactivated and the movable punches 1, 3 and 7 related to the other salient pole portions P1, P3 and P7 are activated and punched out. The tooth tips 24a are formed at the tips of the salient poles P5, P9, and the tooth bottoms 24b are formed at the tips of the salient poles P1, P3, P7.

The stator iron plate 30b shown in FIG. 10 (b) is
When the movable punches 1 and 5 related to the salient pole portions P1 and P5 are inactivated and the movable punches 3 and 7 and 9 related to the other salient pole portions P3, P7 and P9 are activated and punched out. The tooth tips 24a are formed at the tips of the salient poles P1 and P5, and the tooth bottoms 24b are formed at the tips of the salient poles P3, P7, and P9.

Thereafter, similarly, FIG. 10 (c) and FIG.
(D), stator iron plates 30c, 30 shown in FIG. 10 (e)
d and 30e are the salient pole portions P1 and P1 as shown in FIG.
The movable punches 1, 3, ... 9 related to P3, ... P9 are selectively punched out as inactive or active,
A predetermined tooth tip portion 24a or tooth bottom portion 24b is formed at the tip of each salient pole portion P1, P3, ... P9.

Therefore, when the stator core 10 is formed, the stamped stator iron plates 30a, 30b,
By stacking 30c, 30d, and 30e in this order, 1
The first stator small teeth 24 corresponding to the pitch are attached to the salient pole portions P1, P
3, ... Can be formed at the tip of P9.

Next, referring to FIG. 11 to FIG. 13, the stator iron plates 30a, 3a are formed to form the stator iron plate 10.
0b, 30c, 30d, 30e are punched with a punching die,
The procedure of sequentially stacking the layers will be described.

FIG. 11 is a block diagram for controlling the movable punch of the punching die. In the figure, the salient pole portions P1, P2, P of the stator iron plate 30 forming the stator core 10 are formed.
5 ... It is built in the punching die 31 so as to form the tooth tip portion 24a or the tooth bottom portion 24b of the first stator small tooth 24 at the tip of P9, and each salient pole portion P1, P3. , P5
... The movable punches 1, 3, 5, ... 9 provided so that they can be projected and retracted for each P9, that is, can be projected and returned, selectively drive each solenoid in the order shown in FIG. The appearance is controlled. In addition, 32a is a connection electric wire.

FIG. 12 shows the stator iron plates 30a, 30b,
9 is a table showing the relationship between the order of punching and stacking 30c, 30d, 30e and the control state of the movable punches 1, 3, 5, ... 9;
Regarding the operation of No. 9, the ● mark shows the punching operation state (out) for forming the tooth bottom portion 24b, and the ○ mark shows the punching operation state (depression) for forming the tooth tip portion 24a.

FIG. 13 shows each of the movable punches 1, 3, 5,
...... It is an explanatory view for clearly showing the control state of the movable punch 33 which is one of 9 and FIG.
Shows its operating state (out), and FIG. 13 (b) shows its inactive state (since). In FIG. 13, the movable punch 33 is arranged in the punching die 31 so as to be movable in the vertical direction in the figure, and a cam 33 a is formed on the upper surface of the movable punch 33. It is in contact with a cam member 35 that is driven to the right in the figure.

The ON signal from the punch controller 32 is
When input to the solenoid 34, the solenoid 34
Is urged to drive the cam member 35 to the right. When the cam member 35 and the cam 33a of the movable punch 33 are brought into contact with each other by the driving of the cam member 35, the movable punch 33 projects from the surface of the punching die 31 and is moved as shown in FIG. ) The operating state becomes as shown in.

When an OFF signal is input from the punch controller to the solenoid 34, the solenoid 3
4 is deenergized, and the cam member 35 is returned to the left by the returning means (not shown). When the cam member 35 returns, the ridges of the two cams are disengaged, and the movable punch 33 is pulled in from the surface of the punching die 31 by a return means (not shown) to the inoperative state shown in FIG. 13 (b). Become.

The stator core 10 has the stator iron plates 30a, 30b, 30 punched out as described above.
c, 30d, and 30e can be sequentially laminated and formed according to the laminating order shown in FIG.

Next, in another embodiment of the linear rotary composite type stepping motor of the present invention, the stator core 10 will be described.
FIG. 14 shows an example of the stator iron plate 40 that forms the. Figure 1
4, the stator iron plate 40 has a phase number m = 2 of the linear motor part and a phase number n = 2 of the rotary motor part.
(M + n) = 8 salient pole portions P41, P42, P43, ...
... P48 are arranged at an equal pitch angle of 45 degrees.

In the stator iron plate 40, the salient pole portion P
41 and P42 and P45 and P46 are salient pole portions that form a pair, respectively, and form salient pole portions in which the second stator small teeth 25 are formed in the circumferential direction, and the salient pole portions P43 and P44,
P47 and P48 are salient pole portions that form a pair, and form salient pole portions in which the first stator small teeth 24 are formed in the axial direction. The angle formed by the centers of the second stator small teeth 25 formed on the salient pole portions P41 and P42 is 46.8 degrees, and the angle of the second stator small teeth 25 formed on the salient pole portions P42 and P45 is small. The angle formed by the centers is 131.4 degrees. Also, salient pole P45
And the angle formed by the centers of the second stator small teeth 25 formed on P46 is 46.8 degrees. Also, the second not shown
The number of small teeth Zr of the mover arranged in the circumferential direction of the mover iron core is 50.

Therefore, assuming that the second stator small teeth 25 of the salient pole portion P41 and the small teeth 28 of the second stator core of the movable body 2 are exactly opposite to each other, the small teeth of the salient pole portion P42. Two
5 and the small teeth 28 of the second mover iron core have a tooth pitch (7.2
1/4 degree), and when the stator windings wound around the salient pole portions P41 and P42 are energized, they can be connected so as to have mutually different polarities to form one phase. Also,
Small teeth 25 of salient pole portion P45 and small teeth 28 of the second mover iron core
Is shifted by 1/4 of the tooth pitch, and the small tooth 25 of the salient pole portion P46 and the small tooth 28 of the second mover iron core have a tooth pitch of 3
/ 4, and the deviation between the small teeth 25 of the salient pole portions P45 and P46 is 2/4 of the tooth pitch. Therefore,
When the stator windings wound around the salient pole portions P45 and P46 are energized, they are connected so as to have polarities different from each other to form one phase, and the mover is configured as shown in FIGS. By doing so, a two-phase hybrid rotary stepping motor having a basic step angle of 1.8 degrees can be constructed.

FIG. 15 shows the salient pole portion P of the stator iron plate 40.
The tip portions of 43, P44, P47, and P48 are punched so as to become a salient pole portion that periodically forms a tooth tip portion 24a or a salient pole portion that forms a tooth tip portion 24b when the stator iron plate 40 is punched. Each salient pole portion P43, P4 built in the die
The salient poles 41 and 42 formed when punching and stacking the movable punches corresponding to 4, P47, and P48 under the control of the punch control device 32 so as to be in a state of operating as a punch or a state of not operating as a punch. , 4
3, the appearance (shape) of the first and second stator small teeth 24, 25 of the stator 48 is seen from the side of the mover 2.

The hatched portions indicate the respective tooth top portions 24a and 25a, and the unhatched portions indicate the respective tooth bottom portions 24b and 25b. The stator iron plate 4
By setting the thickness of ₀ as t ₀ and stacking as described above, the stator salient poles 43, 44, 47, 48 have a tooth pitch of 2 mt _{0 in the} axial direction, that is, 4 t ₀ , and a tooth thickness of 2 t ₀ . Axial first stator tines 24 are formed. Moreover, when the salient pole 43 is used as a reference, the deviation of the small tooth 24 of the salient pole 44 is 2/4 of the tooth pitch, and the deviation of the small tooth of the salient pole 47 is 1 /.
4. The deviation of the small teeth 24 of the salient pole 48 is 3/4 of the tooth pitch. Therefore, as shown in FIG. 16, the stator winding W41,
By connecting W42, W43, ... W48, a two-phase hybrid linear stepping motor having a basic movement amount t ₀ can be constructed.

As described above, the two-phase linear rotary compound type stepping motor can be constructed in this embodiment. Then, as described above, the adjacent salient poles 41, 4
2; 43, 44; 45, 46; 47, 48 respectively 1
By configuring the phases, the magnetic circuits of each phase can be made independent, and at the same time, the magnetic circuits of the linear motor part and the rotary motor part can be made independent of each other, and the coupling between the phase windings can be reduced. You can

Although the above-mentioned two embodiments are for the hybrid type stepping motor, the present invention can be similarly applied to the VR type stepping motor. The technique of the present invention is not limited to the technique in the above-described embodiment, and may be implemented by means of another aspect having the same function. Further, the technique of the present invention may be modified in various ways within the scope of the above configuration. Can be added.

[0059]

As is apparent from the above description, according to the linear rotary composite type stepping motor of the present invention, in claims 1, 2 and 3, the stator side is internally
Is a plurality of salient poles that are arranged radially toward the side.
The salient pole has a plurality of first axially arranged inner circumferential surfaces.
A salient pole with small stator teeth and a plurality of first teeth in the circumferential direction.
2 types of stator stator teeth and salient poles
Inside the stator with the stator having a stadium core and the mover side
The shaft allows it to move in the axial direction and also in the rotational direction.
It is rotatably supported and is mounted in the axial direction.
Several mover iron cores, the outer peripheral surface of which is provided with the first
A plurality of first teeth facing the stator teeth and having an equal pitch in the axial direction.
A first mover iron core on which the mover small teeth are formed;
A plurality of stator small teeth facing each other at equal pitch in the circumferential direction.
Of the second mover core on which the second mover small teeth of
Since it has a mover having two types,
With a stator iron plate can be made common, it can be arbitrarily set the percentage of the linear motor portion and the rotary motor of the mover.

Therefore, for all claims, the step
The effect that the assembly workability of the entire ping motor is improved
Play.

[0061]

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of a linear / rotary composite type stepping motor of the present invention.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG.

FIG. 3 is a cross-sectional view taken along the line III-III in FIG.

FIG. 4 is a development view of first and second movable child teeth formed on the outer peripheral surface of the movable member as viewed from the stator side.

FIG. 5 is a perspective view showing a shape of an iron core of a moving element.

FIG. 6 is a vertical sectional view showing another example of a mover core.

7 is a diagram of a stator iron plate forming a stator core, and FIG.
7A is a plan view thereof, and FIG. 7B is an enlarged view of a portion A in FIG. 7A.

8 is a first and second small stator formed when the stator iron plates of FIG. 7 are rotationally laminated by 144 degrees or the stator iron plates of FIG. 10 are sequentially laminated in the laminating order shown in FIG. It is the development view which saw the tooth from the mover side.

9 is a connection diagram of a stator winding of the 5-phase linear rotary composite type stepping motor in FIG.

FIG. 10 is a plan view of each stator iron plate forming the stator core, and includes FIGS. 10 (a), 10 (b), 10 (c), and FIG.
FIG. 0 (d) and FIG. 10 (e) are diagrams showing an example in which a tooth tip portion or a tooth bottom portion forming a stator small tooth is formed at the tip of each salient pole portion.

FIG. 11 is a configuration diagram for controlling a movable punch built in a die for punching a stator iron plate.

FIG. 12 is a chart showing the relationship between the punching stacking order of the stator iron plates used for the control of FIG. 11 and the control state of each movable punch.

FIG. 13 is an explanatory view showing a control state of a movable punch incorporated in a punching die, FIG. 13 (a) is an operation state diagram thereof, and FIG.
3 (b) is a diagram of the inoperative state.

FIG. 14 is a plan view of a stator iron plate forming a stator core according to another embodiment of the present invention.

FIG. 15 is formed when the stator iron plate of FIG. 14 is punched and laminated in a predetermined order while the movable punch is controlled to move in and out by a punching die having a movable punch built in for each salient pole portion. It is the development view which looked at the 1st and 2nd stator small teeth from the mover side.

16 is a wiring diagram of a stator winding of the two-phase linear / rotary composite type stepping motor in FIG.

[Explanation of symbols] 1 stator 2 mover 10 stator cores 11, 12, 13, ... 20, 41, 42, 43, ...
48 salient pole 21 shafts 22a, 22b first mover iron cores 22c, 22d second mover iron cores 23, 23a, 23b permanent magnet 24 first stator small teeth 24a, 25a, 27a, 28a tooth tip 24b, 25b, 27b, 28b Bottom part 25 Second stator small tooth 27 First mover small tooth 28 Second mover small tooth 30, 30a, 30b, ... 30e, 40 Stator iron plates P11, P12, P13 , ... P20, P41, P4
2, P43, ... P48 Salient pole portion W1, W2, W3, ... W10 Stator winding

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-54-161008 (JP, A) JP-A-4-229063 (JP, A) JP-A 64-19959 (JP, A) JP-A 58- 108948 (JP, A) JP 63-228945 (JP, A) JP 7-143722 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H02K 41/00 H02K 37 / 00

Claims (4)

(57) [Claims] 1. A plurality of salient poles radially arranged toward the inside, the salient poles having a plurality of first stator small teeth formed in the axial direction on the inner peripheral surface thereof. 2 and a salient pole formed with a plurality of second stator small teeth in the circumferential direction.
A stator having a stator core of various types, and a plurality of axially-movable, axially-movable, and axially-supported stators. A plurality of first moving iron cores, and a plurality of first moving iron cores facing the first stator small teeth on the outer peripheral surface thereof at equal pitches in the axial direction.
And a plurality of second mover small teeth are formed at equal pitches in the circumferential direction so as to face the first mover iron core on which the mover small teeth are formed and the second stator small teeth. and a mover having two second mover iron cores, the stator core, when the number of phases of a linear motor portion is m, axially said first tooth pitch cmt ₀ with small teeth are formed in the stator, in the inter first ckm number of the stator salient poles of stator teeth are formed, relative to the first stator teeth of a certain salient pole case, the first stator teeth of other of said salient pole in the movement direction of the mover (d /
2m) A linear-rotary composite type stepping motor characterized in that k sets of salient poles, each of which is a cm number of salient poles in which a shift of cmt ₀ occurs, are formed. However, c is m
Is an odd number, c = 1, and m is an even number, c = 2, t ₀ is the thickness of the iron plate, k is an integer of 1 or more, and d is 1 ≦ d.
Let (cm-1) be different integers that satisfy ≤2m-1. 2. A plurality of salient poles radially arranged toward the inside, the salient poles having a plurality of first stator small teeth formed in the axial direction on the inner peripheral surface thereof. 2 and a salient pole formed with a plurality of second stator small teeth in the circumferential direction.
A stator having a stator core of various types, and a plurality of axially-movable, axially-movable, and axially-supported stators. A plurality of first moving iron cores, and a plurality of first moving iron cores facing the first stator small teeth on the outer peripheral surface thereof at equal pitches in the axial direction.
And a plurality of second mover small teeth are formed at equal pitches in the circumferential direction so as to face the first mover iron core on which the mover small teeth are formed and the second stator small teeth. A second mover iron core and a mover having two types, wherein the stator is a linear motor unit and a rotary motor.
When the phase number of each part, k is an integer of 1 or more,
2km fronts arranged at equal pitches toward the inside
A salient pole, and the salient pole is axially aligned with the first stator small
A salient pole having teeth formed thereon and the second stator small in the circumferential direction.
Stator core with teeth and salient poles arranged alternately
And the axial direction corresponds to the tooth pitch of the first stator small teeth
A plurality of the first mover small teeth are formed with a tooth pitch
And the Zr fronts in the circumferential direction.
The second mover iron core having second mover small teeth formed thereon.
And sandwiched between the pair of first and second mover iron cores.
And a permanent magnet that is magnetized in the axial direction.
The first and the first magnetized by the stone to the north pole and the south pole
The number of the two mover iron cores is the same, and
The number of teeth Zr of the two moving small teeth should satisfy the following relation.
Combined linear / rotary type
Stepping motor. Zr = k (mb + a), where
b is an integer of 1 or more, and a is 1 ≦ a <2m when m is an even number.
It is a satisfying odd number, and when m is an odd number, 1 ≦ a <m or
An integer that satisfies m ≦ a <2m 3. The moving element is for a linear motor.
For one of the first mover iron core and rotary motor
All one of the second mover cores is integrally formed
Two sets of mover cores are used as a pair of mover cores
Move the child iron core vertically with respect to the axial center of the mover.
And the pair of moving elements are arranged symmetrically with respect to the axis.
A permanent magnet that is sandwiched between iron cores and magnetized in the axial direction is installed.
Claim 1 or claim 2 characterized in that
The combined linear-rotary stepping motor. 4. A plurality of members arranged radially inwardly.
A plurality of salient poles, the salient poles being provided on the inner peripheral surface thereof in the axial direction.
A salient pole formed with a plurality of first stator small teeth and a circumferential direction
2 with a salient pole on which a plurality of second stator small teeth are formed
A stator having a stator core of various types, and inside the stator
The shaft allows it to move in the axial direction and also in the rotational direction.
It is rotatably supported and is mounted in the axial direction.
Several mover iron cores, the outer peripheral surface of which is provided with the first
A plurality of first teeth facing the stator teeth and having an equal pitch in the axial direction.
A first mover iron core on which the mover small teeth are formed;
A plurality of stator small teeth facing each other at equal pitch in the circumferential direction.
Of the second mover core on which the second mover small teeth of
A stator having two types, wherein the stator is the number of phases of the linear motor unit, and n is a rotor.
When setting the number of phases of the remotor,
2 (m + n) salient poles, and the salient poles are in the axial direction.
The two adjacent ones on which the first stator teeth are formed
There are m pairs of salient poles consisting of salient poles, and the second fixed pair in the circumferential direction.
A protrusion consisting of two adjacent salient poles with small teeth
The pole pair has a stator core consisting of n pairs.
Linear rotary compound type stepping motor.