JP2015095956A - Inductor motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inductor motor having excellent characteristics capable of achieving high output characteristics even with a small diameter.SOLUTION: An inductor motor 1 including a stator 2 where a plurality of stator teeth 21 are standing from the outer periphery of a substantially annular holding plate 22, an exciting coil 25 applied on the outer peripheral side of a set of two stators 2, and a rotor 4 where two magnet rotors are arranged coaxially, and a stator block 20 where the exciting coil 25 is extrapolated on a set of two stators 2 is extrapolated on each magnet rotor further includes a substantially annular support member 27 provided with a guide 271 for supporting the stator teeth 21 on the inner peripheral side.

Description

  The present invention relates to an inductor type motor employing a permanent magnet as a rotor.

  Conventionally, an inductor type motor using a permanent magnet as a rotor is known. As an inductor type motor, for example, as shown in FIG. 14, an inductor in which stator blocks 81 and 82 are extrapolated from a substantially cylindrical rotor (rotor) 83 in which N poles and S poles appear alternately in the circumferential direction. A type motor is known (see, for example, Patent Document 1). In this inductor type motor 8, a stator block 81 having an exciting coil 810 sandwiched between stators 811 and 812 and a stator block 82 having an exciting coil 820 sandwiched between stators 821 and 822 are stacked in two stages.

  Each stator 811, 812, 821, 822 has a plurality of stator teeth that protrude along the axial direction of the rotor 83 on substantially the same circumference. In the stator block 81 (82), the stator 811 (821) and the stator 812 (822) are arranged to face each other so that the stator teeth protruding toward each other mesh with each other. In this inductor type motor 8, the phase of the stator block 82, that is, the position in the rotational direction (circumferential direction) is shifted with respect to the stator block 81 as shown in FIG. The phase difference G between the stator block 81 and the stator block 82 is set to a rotation angle corresponding to a quarter of the stator tooth formation pitch P, for example.

  When the exciting coil 810 (820) provided in the inductor type motor 8 is energized, the opposing stator 811 (821) and the stator 812 (822) are magnetized in different polarities. In the energized stator block 81 (82), the stator teeth arranged on the same circumference alternately present N poles or S poles in the circumferential direction.

  When the exciting coils 810 and 820 are energized with a drive current whose polarity is switched along a predetermined sequence, the polarity of each stator tooth is alternately switched over time. Thus, when the polarity of each stator tooth is alternately switched, an attractive force or a repulsive force is alternately generated between the N pole or S pole of the rotor 83 and each stator tooth. In the inductor type motor 8, the stator blocks 81 and 82 are out of phase in the rotational direction as described above. Therefore, a rotational torque in a predetermined direction is generated in the rotor 83 by the attractive force and repulsive force acting from each stator tooth. Rotates.

  The stators 811, 812, 821, and 822, which are components of the inductor type motor 8, are based on, for example, a plate-shaped intermediate processed member that has been punched to leave a plurality of protruding pieces that protrude toward the inner peripheral side. Produced. If each projecting piece of the intermediate processed member is bent and raised from its root, stator teeth can be formed, and the stator can be produced efficiently.

  In this inductor type motor 8, since the stator teeth are formed by bending the protruding pieces protruding toward the inner peripheral side of the intermediate processed member, the length of the stator teeth is regulated by the inner diameter of the stator. If the stator teeth are made longer, it becomes necessary to enlarge the inner diameter of the stator, and it is inevitable to increase the diameter of the motor. When trying to reduce the diameter of the inductor type motor, there is a possibility that high output characteristics cannot be realized without sufficiently securing the length of the stator teeth.

  Accordingly, an inductor type motor 9 as shown in FIG. 16 has been proposed for the purpose of securing a large rotational torque even with a small diameter (see Patent Document 2). The inductor type motor 9 is characterized by a stator 92 in which a stator tooth 921 is formed by bending and raising each protruding piece based on a substantially flat intermediate processing member provided with a protruding piece toward the outer peripheral side. In this stator 92, stator teeth 921 are erected on the outer peripheral side of a substantially annular holding plate portion 922. In the drawing, only one of the two stator blocks 920 arranged coaxially is shown in the assembling structure, and the other stator block having a different phase is housed in the case 95 and is not shown.

  In the intermediate processed member of the stator 92, each protruding piece protrudes toward the outer peripheral side in the radial direction with the portion serving as the holding plate portion 922 as the center. The projecting length of each projecting piece can be freely set without depending on dimensional specifications such as the diameter of the holding plate 922. In the stator 92, the protruding length of the stator teeth 921 can be freely set regardless of the outer diameter size specification required for the inductor type motor.

  In the inductor type motor 9 of FIG. 16 in which the protruding length of the stator teeth 921 can be set regardless of the outer diameter dimension, high output characteristics can be realized by increasing the protruding length of the stator teeth 921. For example, when it is necessary to reduce the diameter of the inductor-type motor 9, desired output characteristics can be realized by making the stator teeth 921 longer.

JP-A-10-84663 Japanese Patent No. 4252703

  If the configuration of the inductor type motor described in Patent Document 2 is adopted, high output can be realized even with a small diameter, while the rigidity of the thin and long stator teeth needs to be ensured. If the rigidity is insufficient, the stator teeth may bend toward the inner peripheral side due to the attractive force acting from the rotor side. When the stator teeth are bent in this way, there is a possibility that noise may be generated due to interference with the outer peripheral surface of the rotor rotating on the inner peripheral side, and mechanical troubles due to wear or the like may be caused.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide an inductor type motor having excellent characteristics capable of realizing high output characteristics even with a small diameter.

The present invention provides a substantially annular shape by bending each of the protruding pieces based on a substantially flat intermediate processing member made of a magnetic material in which a plurality of protruding pieces protruding in the radial direction are formed in the circumferential direction. A stator in which a plurality of stator teeth are erected from the outer periphery of the holding plate part,
Excitation coils arranged on the outer peripheral side of a set of two stators arranged to face each other so that the stator teeth alternately mesh with each other in the circumferential direction;
A rotor in which two substantially columnar magnet rotors having magnetized surfaces in which N poles and S poles are alternately arranged in the circumferential direction are provided on the outer periphery, are arranged coaxially;
An inductor type motor in which a stator block in which the exciting coil is externally arranged in the set of two stators is extrapolated to each magnet rotor. Because
An inductor motor having a substantially annular shape and having a support member provided on the inner peripheral side with a guide portion supporting the stator teeth is provided.

  Each of the stators of the inductor type motor of the present invention is formed by bending and projecting a protruding piece serving as a stator tooth based on an intermediate processed member formed with a protruding piece protruding toward the radially outer peripheral side. If the protruding piece of the intermediate processed member is lengthened, a stator having elongated stator teeth can be produced. An inductor type motor having elongated stator teeth can achieve high output characteristics even with a small diameter.

  Furthermore, the inductor type motor of the present invention includes a support member that supports the stator teeth. The support member has a substantially annular shape and supports the stator teeth by a guide portion provided on the inner peripheral side thereof. In the inductor type motor of the present invention, since the stator teeth are supported by the support member, the stator teeth are less likely to bend toward the inner peripheral side due to the attractive force acting from the magnet rotor side. If the deflection of the stator teeth toward the inner peripheral side can be suppressed, the interference with the magnet rotor can be avoided, and the generation of abnormal noise and mechanical troubles can be suppressed. Furthermore, this support member that supports the stator teeth from the outer peripheral side can be efficiently incorporated while avoiding interference with members arranged on the inner peripheral side such as a magnet rotor and a bearing portion.

  As described above, the inductor type motor of the present invention is an excellent motor capable of realizing a high output characteristic even with a small diameter.

Examples of the annular shape of the support member in the present invention include a complete annular shape having no opening portion, and an incomplete annular shape having an opening portion in the circumferential direction.
The support member in the present invention is preferably formed of a nonmagnetic material. If the supporting member is made of a nonmagnetic material, the stator teeth can be supported without affecting the magnetic flux flowing through the stator.

In the inductor type motor according to a preferred aspect of the present invention, the support member that supports the stator teeth of one of the two stators constituting the stator block is held in an extrapolated manner on the other stator. Has been
The support member that supports the stator teeth of the other stator is held in a state of being extrapolated to the one stator (Claim 2).

  In this case, it is possible to realize a structure in which the stator teeth are supported by the pair of stators via the support member. If a structure in which the other stator tooth is supported by a support member held by one stator is used, the positional accuracy of the two sets of stators can be increased.

The holding plate portion of the stator included in the inductor type motor according to a preferred aspect of the present invention has a protruding portion that protrudes toward the radially outer peripheral side,
The support member can be extrapolated to the stator from the front end side of the stator teeth, and is prevented from being detached by the protruding portion (Claim 3).
In this case, the support member does not fall off on the opposite side of the stator tooth standing direction, that is, on the holding plate part side. On the other hand, in the assembled state of the inductor type motor, the stator teeth of the other stator are present on the side where the stator teeth are erected, so that the support member does not fall off on this side. The support member is reliably held by the stator and assembled without fear of dropping off.

The guide part provided in the inductor type motor according to a preferred aspect of the present invention protrudes from the outer peripheral side toward the gap between adjacent stator teeth in the circumferential direction,
The support member is positioned in the circumferential direction by the guide portion disposed in a gap between adjacent stator teeth in the circumferential direction.
In this case, a high positional accuracy in the circumferential direction can be secured for the support member held by the stator. If the supporting member is held by the stator with high positional accuracy in the circumferential direction, the pair of stators will not be affected in such a way that the positional accuracy in the circumferential direction is impaired.

The said bearing part is penetrated by the inner peripheral side of the supporting member with which the inductor type motor of the suitable one aspect | mode in this invention is provided (Claim 5).
In this case, the bearing portion can be arranged in a space-efficient manner by utilizing the shape of the support member having an annular shape. If components can be arranged in the radial direction in this way, an increase in axial dimension can be avoided and a compact inductor type motor can be realized.

FIG. 3 is an assembly diagram illustrating the assembly structure of the inductor type motor according to the first embodiment. 1 is a perspective view showing an inductor type motor in Embodiment 1. FIG. FIG. 3 is a cross-sectional view illustrating a cross-sectional structure of the inductor type motor in the first embodiment. The perspective view which looks at the stator in Example 1 from the holding plate part side. The figure which shows the intermediate processing member in Example 1. FIG. FIG. 3 is an assembly diagram illustrating a stator block assembly structure according to the first embodiment. FIG. 3 is a perspective view showing a support member in the first embodiment. The figure explaining the holding structure of the supporting member by the stator in Example 1. FIG. The figure explaining the support structure of the stator tooth | gear by a support member in Example 1. FIG. FIG. 3 is a front view showing an intermediate plate in the first embodiment. The perspective view which shows the 1st rotating shaft which extrapolated only one magnet rotor in Example 1. FIG. The perspective view which shows the 1st rotating shaft which extrapolated two magnet rotors in Example 1. FIG. The perspective view which shows the rotor produced in the 2nd rotor extrapolation process in Example 1. FIG. The assembly drawing which shows the assembly structure of the conventional inductor type motor. The developed view which developed on a plane the meshing structure of the stator teeth in the conventional inductor type motor. The assembly drawing which shows the assembly structure of the conventional inductor type motor.

The embodiment of the present invention will be specifically described with reference to the following examples.
Example 1
This example is an example related to the inductor type motor 1. The contents will be described with reference to FIGS.

As shown in FIGS. 1 to 4, the inductor type motor 1 of this example includes a stator 2 in which a plurality of stator teeth 21 are erected from the outer periphery of a substantially annular holding plate portion 22, and the stator teeth 21 in the circumferential direction. An excitation coil 25 arranged on the outer peripheral side of a pair of stators 2 arranged to face each other so as to be alternately engaged, and a magnetized surface 401 in which N poles and S poles are alternately arranged in the circumferential direction are arranged on the outer periphery. A rotor 4 in which two substantially cylindrical magnet rotors 40 provided are coaxially arranged, and a bearing metal (bearing portion) 54 that supports a rotating shaft (rotating shaft) 41 of the rotor 4 are provided. . In this inductor type motor 1, a stator block 20 in which an excitation coil 25 is arranged on a pair of stators 2 is extrapolated to each magnet rotor 40.
The inductor type motor 1 includes a support member 27 that has a substantially annular shape and is provided with a guide portion 271 (FIG. 7) that supports the stator teeth 21 on the inner peripheral side.
Hereinafter, this content will be described in detail.

  The inductor type motor 1 of this example is a so-called permanent magnet type (permanent magnet type) brushless 6-pole motor as shown in FIGS. The inductor type motor 1 is a motor in which the rotor 4 rotates in synchronization with the energization sequence when the excitation coil 25 is energized in a predetermined sequence. In the inductor type motor 1, the motor case 5 that accommodates the stator block 20 and the like has an axial length of 136 mm, and has an elongated shape with a diameter of 48 mm. The number of poles of the inductor motor 1 can be set to various pole numbers such as 12 poles and 24 poles in addition to the 6 poles of this example.

As shown in FIGS. 1 to 3, the motor case 5 includes a cylindrical case 50 formed of SPCE (cold rolled steel plate), side end plates 52 attached to openings at both ends of the case 50, and a rotor. And a bearing metal 54 that pivotally supports the four rotating shafts. In addition, illustration of case 50 is abbreviate | omitted in FIG.
As shown in FIG. 2, both ends of the case 50 are not flush with each other but are formed with recessed portions 501 that recede in the axial direction (see FIG. 2). The recessed part 501 is arrange | positioned in two places which oppose in the circumferential direction.

  The side end plate 52 is a substantially annular plate member. In the side end plate 52, a positioning hole 521 for receiving an engaging convex portion 231 (described later with reference to FIG. 4) of the stator 2 is formed. In the inductor type motor 1 of this example, the position in the circumferential direction (rotation direction) of the stator 2 with respect to the side end plate 52 is regulated by the housing structure of the engaging convex portion 231 and the positioning hole 521 on the stator 2 side.

  On the outer periphery of the side end plate 52, a convex portion 522 protruding in the radial direction is formed. The convex portions 522 that engage with the concave portions 501 of the case 50 are provided at two locations facing each other in the circumferential direction. In the motor case 5, the position of the side end plate 52 in the circumferential direction is regulated by the engagement structure between the recess 501 of the case 50 and the convex portion 522 of the side end plate 52.

  A through hole is formed on the inner peripheral side of the side end plate 52, and a bearing metal 54 for pivotally supporting the rotating shaft (rotating shaft) 41 of the rotor 4 is disposed through the through hole. The bearing metal 54 is a sliding bearing made of a ferrous metal material. The bearing metal 54 is formed by providing a flange-like collar 540 at one end of a cylindrical shape. The bearing metal 54 is attached so that the flange-shaped collar 540 is positioned on the inner side in the axial direction, and is prevented from coming off by the collar 540.

  As shown in FIG. 4, the stator 2 of the inductor type motor 1 includes a substantially annular holding plate portion 22 having a through hole 220 in the center, and six stator teeth standing from the outer periphery of the holding plate portion 22. 21 and a stabilizer (protrusion) 23 for stabilizing the mounting posture of the stator 2 during assembly. The stabilizer 23 is formed so as to protrude from the holding plate portion 22 to the outer peripheral side in the radial direction.

  In addition, the stator 2 of this example consists of the steel plate SPCE which is a magnetic material. In addition, the stator 2 may be made of a magnetic material such as SPCD, SGCD, SUYB, or the like. Further, in this example, the four stators 2 constituting the two stator blocks 20 are of the same specification, thereby reducing the number of types of components.

  As shown in FIG. 4, the six stator teeth 21 in the stator 2 are erected from the outer periphery of the holding plate portion 22 so as to be arranged at equal intervals on substantially the same circumference. The six stabilizers 23 are formed at equal intervals by being shifted by 30 degrees in the circumferential direction from the standing position of the stator teeth 21. An engagement projection 231 is formed at the tip of every other three of the six stabilizers 23. The engaging projection 231 protrudes on the opposite side of the stator teeth 21 and is formed to engage with a mating member (in this example, the intermediate plate 26 or the side end plate 52 shown in FIG. 1). .

  Here, a method for producing the stator 2 of this example will be described. The stator 2 of this example is manufactured by pressing a flat raw material (not shown) made of a magnetic material. In manufacturing the stator 2, a plate-shaped raw material is punched to obtain an intermediate processed member 29 as shown in FIG. 5. The intermediate processing member 29 includes a substantially annular ring portion 292 having a through-hole 290 in the center, and projecting pieces 291 projecting radially outward from six circumferentially equidistant locations on the outer periphery of the ring portion 292. And a protruding piece 293 protruding outward in the radial direction from each position shifted by 30 degrees from the position where the protruding piece 291 is formed.

  As shown in FIGS. 4 and 5, the stator 2 is formed by bending the protruding piece 291 based on the intermediate processed member 29. Specifically, the stator teeth 21 are formed by bending each protruding piece 291 so as to be perpendicular to the ring portion 292. The holding plate portion 22 in the stator 2 that is a finished product includes a ring portion 292. The stator tooth 21 is made of a protruding piece 291, and the stabilizer 23 is made of a convex piece 293.

  As shown in FIG. 6, the stator block 20 has two sets of stators 2 facing each other so that the stator teeth 21 are alternately meshed in the circumferential direction, and an excitation coil 25 is arranged on the outer peripheral side of the stator teeth 21. It is an intermediate part. In the inductor type motor 1 of this example, two stator blocks 20 are coaxially arranged in the axial direction with an intermediate plate 26 (FIG. 1) interposed.

  As shown in FIGS. 3 and 6, the exciting coil 25 is obtained by winding an electric wire 251 around the outer periphery of a thin, substantially cylindrical bobbin 250 (FIG. 3) made of a nonmagnetic material. The bobbin 250 is configured to be extrapolated with respect to the stator block 20 without a gap. The bobbin 250 has large-diameter side plates 252 for facilitating winding of the electric wire 251 at both ends in the axial direction. In this example, a bobbin 250 made of a resin (PBT) which is a nonmagnetic material is used. As the electric wire 251, a material made of polyurethane copper wire was adopted.

  The outer shape of the side plate 252 of the bobbin 250 is not a perfect circle, and a recess 255 that is recessed toward the inner periphery is formed on the outer periphery. The recessed portion 255 has a shape for accommodating a feed lead wire (not shown) of the exciting coil 25 and the like.

  In the stator block 20, the two stators 2 are combined with a support member 27 that supports the tips of the stator teeth 21 interposed therebetween. The support member 27 is mounted on each of the two stators 2 constituting the stator block 20. The support member 27 is inserted from the front end side of the stator teeth 21 and is arranged on the base side of the stator teeth 21. The support member 27 mounted in this way supports the tip of the stator tooth 21 of the other stator 2 that is disposed opposite to the stator 2 on the mounted side. In the assembly drawings of FIGS. 1 and 6, when the support member 27 is illustrated, the support member 27 is illustrated not on the distal end side of the stator tooth 21 corresponding to the insertion side but on the holding plate portion 22 side that is the mounting side.

  As shown in FIG. 7, the support member 27 includes an annular portion 273 located on the outer peripheral side of the array circle of the stator teeth 21, and a guide portion 271 provided on the inner peripheral side of the annular portion 273 so as to support the stator teeth 21. ,have. The support member 27 is assembled in a state in which the support member 27 is externally arranged and held on the stator 2. The support member 27 is extrapolated from the tip end side of the stator tooth 21 and is attached to the stator 2 with the guide portion 271 contacting the holding plate portion 22 (see FIGS. 4 and 6) of the stator 2.

  The guide portion 271 is formed so as to protrude to the inner peripheral side from the gap between the stator teeth 21 adjacent in the circumferential direction when mounted on the stator 2. The circumferential position of the guide portion 271 coincides with the stabilizer 23 provided on the stator 2. The guide portion 271 is provided with an insertion hole 270 for inserting the tip of the stator tooth 21. The insertion hole 270 accommodates the tip of the stator tooth 21 of the other stator 2 that is opposed to the stator 2 instead of the attached stator 2.

  In the support member 27, the guide portion 271 and the annular portion 273 are formed in a stepped manner in the thickness direction. According to the guide part 271 formed in a step difference with respect to the annular part 273, the dimension in the thickness direction of the stabilizer 23 can be avoided, and the annular part 273 can be arranged almost flush with the holding plate part 22. If the annular portion 273 can be disposed so as to be substantially flush with the holding plate portion 22 in this way, the space for incorporating the support member 27 is reduced by shortening the axial dimension of the exciting coil 25 by the thickness of the support member 27. There is no need to secure. Thus, the support member 27 of this example can be incorporated into the stator block 20 without changing the dimensions and the like that affect the magnetic characteristics.

  In addition, the outer peripheral shape of the annular part 273 is not a perfect circle, but the recessed part 275 is formed in one place of the circumferential direction. The recess 275 has a shape for accommodating a power supply lead wire (not shown) of the excitation coil 25 and the like.

  As shown in FIGS. 1 to 3, the rotor 4 has a rotating shaft (rotating shaft) 41 for taking out the rotating output of the inductor type motor 1, and two magnet rotors 40 are attached to the rotating shaft 41. Inserted and fixed. The magnet rotor 40 is inserted in a rotatable state on the inner circumferential side of the arrangement circle formed by the stator teeth 21 of the stator 2.

  The magnet rotor 40 has a magnetized surface 401 on which an N pole and an S pole appear alternately in the circumferential direction on the substantially cylindrical outer peripheral surface. In this example, the magnet rotor 40 made of the material neodymium is employed. In addition to the above, ferrite, samarium cobalt, etc. can be used as the material of the magnet rotor 40.

  Each magnet rotor 40 has an engaging portion 403 (FIG. 11) having a semicircular cross section at the end adjacent to the other magnet rotor 40. In the rotor 4, the intermediate recesses 42 are formed by combining the semicircular engaging portions 403 of the magnet rotors 40 so as to form a circular shape (FIG. 3). In the assembled state of the inductor type motor 1, the holding plate portion 22 and the intermediate plate 26 of the stator 2 are arranged to be extrapolated in the intermediate recess 42.

  As shown in FIG. 10, the intermediate plate 26 is a substantially annular plate-like plate that has an outer diameter that substantially matches the inner diameter of the motor case 5 (FIG. 2) and an inner diameter that is larger than the intermediate recess 42 (FIG. 3). It is a shaped member. The intermediate plate 26 is made of a magnetic material, and forms a path for magnetically connecting a pair of stators 2 constituting the stator block 20. In this example, an intermediate plate 26 made of SPCE, which is a magnetic material, is employed.

  The intermediate plate 26 is configured to be able to hold the two stators 2 in a back-to-back state. The intermediate plate 26 is provided with three positioning holes 261 in the circumferential direction for accommodating the engaging projections 231 (see FIG. 4) of each stator 2. The positioning hole 261 corresponding to one stator 2 and the positioning hole 261 corresponding to the other stator 2 are provided at positions shifted by 15 degrees in the circumferential direction.

  The circumferential position of the positioning hole 261 of the intermediate plate 26 is shifted by 30 degrees in the rotational direction (circumferential direction) with respect to the circumferential position of the positioning hole 521 of the corresponding side end plate 52. With such a configuration, the stator 2 in which the engaging convex portion 231 is engaged with the positioning hole 521 of the side end plate 52 and the stator 2 in which the engaging convex portion 231 is engaged with the positioning hole 261 of the intermediate plate 26 are combined. , And can be opposed to each other by being shifted by 30 degrees in the rotation direction.

  Note that the outer peripheral shape of the intermediate plate 26 is not a perfect circle, and a recess 262 that is recessed toward the inner peripheral side is formed at one place in the circumferential direction. The recess 262 has a shape for accommodating a power supply lead wire (not shown) of the excitation coil 25 and the like.

  Next, the assembly procedure of each component will be described with reference to FIGS. 11 to 13 so that the configuration of the inductor type motor 1 of the present example becomes clearer. First, as shown in FIG. 1, the inductor type motor 1 of the present example has a stator block 20 in which the stator 2 is disposed oppositely so that the stator teeth 21 mesh with each other and an excitation coil 25 is extrapolated, and an N pole and S on the outer circumferential surface. The rotor 4 including the magnet rotor 40 provided with alternating poles is assembled to the motor case 5. In the inductor type motor 1, magnet rotors 40 are respectively arranged on the inner peripheral side of the stator block 20 arranged in two sets on the same axis (FIG. 1).

In manufacturing the inductor type motor 1, the rotor 4 (with two magnet rotors 40 arranged coaxially in a state where the two stators 2 back to back are arranged in the intermediate recess 42 via the intermediate plate 26 is provided. (See FIG. 11).
In producing this rotor 4, in this example, a first rotor extrapolation process in which only the magnet rotor 40 is extrapolated and fixed to the first rotary shaft 411 except for the intermediate plate 26 and the stator 2, and the first rotation. A rotor magnetizing step for magnetizing the outer peripheral surface of each magnet rotor 40 that is externally fixed to the shaft 411, a rotor extracting step for extracting each magnet rotor 40 from the first rotating shaft 411, and the intermediate plate 26 and the like. The second rotor extrapolation process for extrapolating and fixing to the second rotating shaft 41 was performed in this order.

  In the first magnet rotor extrapolation step, as shown in FIGS. 11 and 12, two magnet rotors 40 before magnetization are extrapolated and fixed to the first rotating shaft 411 as a production jig. To do. Here, when the two magnet rotors 40 are extrapolated and fixed, the relative positions in the rotational direction of the magnet rotors 40 are adjusted so that the engaging portions 403 having a semicircular cross section are combined.

  Thereafter, the rotor magnetizing step was performed, the magnet rotor 40 was subjected to multipolar magnetization, and the magnetized surface 401 was provided on the outer peripheral surface thereof. In this rotor magnetizing step, magnetized surfaces 401 in which six N poles and S poles alternately appear in the circumferential direction were formed on the outer peripheral surface of each magnet rotor 40. In the rotor magnetizing step of this example, the two magnet rotors 40 arranged on the same axis were magnetized so that the formation positions of the respective magnetic poles in the rotation direction (circumferential direction) were the same (FIG. 12).

  Thereafter, the rotor extraction step is performed, the two magnet rotors 40 that have been magnetized are extracted from the first rotating shaft 411 as a production jig, and the second rotor extrapolation step is performed. In the second rotor extrapolation step, the magnetized two magnet rotors 40 are moved to the second rotating shaft 41 in a state where the intermediate plate 26 holding the two stators 2 is positioned in the middle in the axial direction. It is the process of extrapolating to.

  In carrying out the second rotor extrapolation step, it is necessary to prepare an intermediate part (not shown) in which the stator 2 and the support member 27 are held on both sides of the intermediate plate 26. After the stator 2 is held on both sides of the intermediate plate 26, the intermediate component can be prepared by attaching the support member 27 from the front end side of the stator tooth 21.

  Here, when the stator 2 is held by the intermediate plate 26, as described above, the engaging projections 231 (see FIG. 10) of the one stator 2 are inserted into the three positioning holes 261 (see FIG. 10) of the intermediate plate 26. 4), and the engaging projections 231 of the other stator 2 are engaged with the other three positioning holes 261. Here, the positioning hole 261 and the positioning hole 261 have their perforation positions shifted by 15 degrees in the circumferential direction. Therefore, if the two stators 2 are held on the intermediate plate 26 as described above, each stator 2 can be shifted by 15 degrees in the circumferential direction.

  In completing the above-described intermediate component based on the stator 2 held on both sides of the intermediate plate 2, the support member 27 is extrapolated from the tip side of the stator tooth 21 of each stator 2. The support member 27 is mounted so that the annular portion 273 is substantially flush with the holding plate portion 22 corresponding to the root of the stator tooth 21 (state of FIG. 8).

  In the second rotor extrapolation step, first, the above-described intermediate part holding the stator 2 and the support member 27 on both sides of the intermediate plate 26 is externally attached to the second rotary shaft 41 that becomes the rotary shaft 41 of the rotor 4. Insert.

  Thereafter, the magnetized magnet rotor 40 is extrapolated from both end sides of the rotary shaft 41 with the intermediate part extrapolated. When extrapolating the magnet rotor 40 with respect to the rotating shaft 41, the engaging portion 403 provided at one end of the magnet rotor 40 was used as the tip in the insertion direction. After extrapolating and fixing the magnet rotor 40 from one end, the other magnet rotor 40 is extrapolated from the other end.

  Here, when the magnet rotor 40 is assembled to the rotary shaft 41, the engaging portions 403 of the magnet rotors 40 are combined in the same manner as in the first rotor extrapolation step. Therefore, according to the second rotor extrapolation step, the relative position in the rotation direction of each magnet rotor 40 can be set in the same manner as when the rotor magnetizing step is performed.

  Further, as shown in FIG. 1, the final assembly process of assembling the stator 2, the exciting coil 25, and the like positioned at both ends in the axial direction and accommodating the motor case 5 is performed. In carrying out this final assembly process, the support member 27 is attached to the stator 2 to be assembled. As described above, the support member 27 is attached to the base side of the stator tooth 21 (FIG. 8).

  In the final assembly process, as shown in FIGS. 1 and 2, the rotor 4 assembled with the stator block 20 is inserted into the case 50. In the case of the rotor 4 in which the stator 2, the intermediate plate 26, the excitation coil 25, and the support member 27 are correctly assembled, the recesses provided on the outer periphery of each component are arranged substantially in a straight line, and the power supply lead of the excitation coil 25 A line (not shown) or the like can be accommodated.

  After housing the rotor 4 in the case 50, the side end plates 52 to which the bearing metal 54 is previously attached are attached to both ends. At this time, the assembly is performed while adjusting the circumferential position so that the engaging projection 231 of the stator 2 is accommodated in the positioning hole 521 of the side end plate 52.

  The inductor type motor 1 of this example is a motor having a high output characteristic while having a small diameter by including the long stator teeth 21. In the case of the long stator teeth 21, it is important to ensure the rigidity of the stator teeth 21. If the rigidity is not sufficient, the stator teeth 21 are attracted to the magnet rotor 40 side and bent toward the inner peripheral side and contact the outer peripheral surface of the magnet rotor 40. May occur.

  On the other hand, in the inductor type motor 1 of this example, since the support member 27 that supports the tip of the stator tooth 21 is provided, there is little possibility that the stator tooth 21 is bent. Further, the support member 27 has a structure that supports the tips of the stator teeth 21 so as to be lifted from the outer peripheral side, and has a hollow structure on the inner peripheral side. If the inner peripheral side has a hollow structure, it is possible to avoid interference with the bearing metal 54 and the like that pivotally support the rotating shaft 41, and to design a new special structure for avoiding the bearing metal 54 and the like. There is no need.

  Further, in the support member 27 of this example, a guide portion 271 that supports the tip of the stator tooth 21 and an annular portion 273 provided with the guide portion 271 are formed in a stepped manner in the thickness direction of the support member 27. . In the support member 27 adopting this uneven structure, the annular portion 273 and the holding plate portion 22 of the stator 2 can be brought close to each other, and the support member 27 can be incorporated without reducing the axial dimension of the exciting coil 25. Is possible. The incorporation of the support member 27 is extremely unlikely to affect the magnetic characteristics of the inductor type motor 1, and the output characteristics of the inductor type motor 1 are not impaired.

  The stator 2 constituting the inductor type motor 1 configured as described above bends and raises the protruding piece serving as the stator tooth 21 based on the intermediate processed member 29 formed with the protruding piece protruding toward the radially outer peripheral side. Formed. If the protruding piece of the intermediate processing member 29 is lengthened, the stator 2 having the elongated stator teeth 21 can be produced. The inductor motor 1 having the elongated stator teeth 21 can achieve high output characteristics even with a small diameter.

  The inductor type motor 1 includes a support member 27 that supports the stator teeth 21. The support member 27 has a substantially annular shape, and supports the stator teeth 21 by a guide portion 271 provided on the inner peripheral side thereof. Since the stator teeth 21 are supported by the support member 27, there is little possibility that the stator teeth 21 will bend toward the inner peripheral side by the attractive force acting from the magnet rotor 40 side. If the deflection of the stator teeth 21 toward the inner peripheral side can be suppressed, interference with the magnet rotor 40 can be avoided, and the occurrence of abnormal noise and mechanical troubles can be suppressed.

  As described above, the inductor type motor 1 of the present invention is a motor having excellent characteristics capable of realizing high output characteristics even with a small diameter.

  In the inductor type motor 1 of this example, a support member 27 that supports the tips of the stator teeth 21 is employed. Instead, a support member that supports an intermediate position of the stator teeth 21 in the standing direction may be employed. Furthermore, if 12 guide portions are provided in the circumferential direction with respect to the support member that supports the position corresponding to the approximate center in the standing direction of the stator teeth 21, a structure in which one support member is shared between two sets of stators 2. Can be realized.

  As described above, specific examples of the present invention have been described in detail as in the embodiments. However, these specific examples merely disclose an example of the technology included in the scope of claims. Needless to say, the scope of the claims should not be construed as limited by the configuration, numerical values, or the like of the specific examples. The scope of the claims includes techniques in which the specific examples are variously modified, changed, or appropriately combined using known techniques and knowledge of those skilled in the art.

DESCRIPTION OF SYMBOLS 1 Inductor type motor 2 Stator 20 Stator block 21 Stator tooth 22 Holding plate part 25 Excitation coil 26 Intermediate plate 27 Support member 270 Insertion hole 273 Annular part 271 Guide part 4 Rotor 40 Magnet rotor 401 Magnetized surface 41 Rotating shaft (second shaft) Rotating shaft, rotating shaft)
411 First rotating shaft 42 Intermediate recess 5 Motor case 50 Case

Claims (5)

A substantially annular holding plate portion is formed by bending each projecting piece based on a substantially flat intermediate processing member made of a magnetic material formed with a plurality of projecting pieces projecting radially outward in the circumferential direction. A stator having a plurality of stator teeth erected from the outer periphery of
Excitation coils arranged on the outer peripheral side of a set of two stators arranged to face each other so that the stator teeth alternately mesh with each other in the circumferential direction;
A rotor in which two substantially columnar magnet rotors having magnetized surfaces in which N poles and S poles are alternately arranged in the circumferential direction are provided on the outer periphery, are arranged coaxially;
An inductor type motor in which a stator block in which the exciting coil is externally arranged in the set of two stators is extrapolated to each magnet rotor. Because
An inductor-type motor comprising a support member having a substantially annular shape and having a guide portion for supporting the stator teeth provided on an inner peripheral side. In Claim 1, the support member that supports the stator teeth of one of the two stators constituting the stator block is held in an extrapolated manner in the other stator,
The support member that supports the stator teeth of the other stator is an inductor type motor that is held in an extrapolated manner on the one stator. In Claim 2, the holding plate portion of the stator has a protruding portion protruding toward the radially outer peripheral side,
The support member is an inductor type motor that can be extrapolated to the stator from the front end side of the stator teeth and is prevented from being detached by the protruding portion. In claim 3, the guide portion protrudes from the outer peripheral side toward the gap between adjacent stator teeth in the circumferential direction,
The said support member is an inductor type motor positioned in the circumferential direction by the said guide part arrange | positioned in the clearance gap between the stator teeth adjacent in the circumferential direction.   The inductor type motor according to any one of claims 1 to 4, wherein the bearing portion is disposed through the inner peripheral side of the support member.

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