JP2008167534A - Jig and method for motor size reduction - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a jig and a method for motor downsizing that are simple in construction and to make it possible to easily compress a coil end. <P>SOLUTION: The jig for downsizing includes an insertion member 8 and annular outer frame member 9 and pressing member 10. The insertion member 8 includes a columnar portion 12 with a recess 11 formed therein and an annular portion 13, disposed along the outer circumference of the lower part of the columnar portion 12. The pressing member 10 includes a projection 15 and an annular pressing surface 16 formed on the peripheral portion of the projection 15. A stator 1 is fit onto the columnar portion 12 of the insertion member 8 from above, and then the outer frame member 9 is disposed on the peripheral portion of a coil end 17 at the upper part of the stator 1. The pressing member 10 is fit into the outer frame member 9 and pushed downward, then the projection 15 of the pressing member 10 is fit into the recess 11 of the insertion member 8, and the coil end 17 in the outer frame member 9 is compressed and shaped by the pressing surface 16. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a jig for miniaturizing a motor.
The present invention also relates to a motor miniaturization method using such a miniaturization jig.

  Conventionally, a stator having a structure in which a coil is housed and held in a plurality of slots formed along the circumferential direction of a substantially cylindrical iron core, and a rotor that is rotatably disposed inside the stator. Motors having such are known. In such a motor, normally, a coil wound in advance is inserted and held in a plurality of slots of the iron core, so that the coil has an axial length longer than that of the iron core to facilitate insertion into the slot. When the coil is housed and held in the slot, the coil ends protrude from the both ends of the iron core in the axial direction.

In order to arrange such a motor in a limited space such as being mounted on a vehicle, it is required to reduce the size of the motor while ensuring the output characteristics of the motor.
In this case, it is necessary to make the iron core or the coil end small. However, since the physique of the iron core affects the output characteristics of the motor, it is difficult to reduce the size.

  Therefore, for example, Patent Document 1 discloses a method of reducing the protruding height of the coil end by compressing the coil end using a forming jig so as to reduce the space occupied by the coil end. The forming jig has a plurality of inner members that are divided from each other along the circumferential direction and each have an inclined surface at the tip thereof, and an outer member that presses the coil end from the axially outer side of the stator. is doing. The plurality of inner members are slid so as to expand radially outward after passing from one end of the stator to the other end, thereby pressing the coil end with the inclined surface at the tip, and by the outer member The coil end is compressed by pressing the coil end from the outside in the axial direction of the stator.

Japanese Patent Application Laid-Open No. 2002-272047

However, the forming jig disclosed in Patent Document 1 has a plurality of inner members that are divided from each other along the circumferential direction and each has an inclined surface at the tip thereof. There was a problem.
In addition, it is necessary to compress the coil end by moving the plurality of inner members through the stator and then moving outward in the radial direction thereof. Since it was necessary to remove each from the inside of the stator after moving inward, there was a problem that the entire compression work was troublesome.
The present invention has been made to solve such problems, and an object thereof is to provide a motor miniaturization jig that has a simple configuration and can easily compress a coil end.
Another object of the present invention is to provide a motor miniaturization method using such a miniaturization jig.

  A jig for miniaturizing a motor according to the present invention is a jig for miniaturizing a motor having a stator having a structure in which a coil is wound around a substantially cylindrical iron core, along the axial direction of the stator. It is arranged so as to surround the outer periphery of at least one of the insertion member inserted inside the stator and having a recess formed in the center of the tip, and the coil ends protruding from both ends of the core in the axial direction. An annular outer frame member, and a convex portion corresponding to the concave portion of the insertion member is formed at the center of the tip thereof, and an annular pressing surface is formed on the outer peripheral portion of the convex portion, and the inner outer surface of the outer frame member is inserted. A pressing member that presses and compresses the coil end in the outer frame member with the pressing surface by being moved toward the insertion member so as to fit the convex portion into the concave portion of the insertion member.

  A motor miniaturization method according to the present invention is a motor miniaturization method using the above-described miniaturization jig, in which an insertion member is disposed inside the stator along the axial direction of the stator. The outer frame member is arranged so as to surround at least one outer periphery of the coil ends protruding from the iron core to both ends in the axial direction, and the press member is inserted inside the outer frame member and moved toward the insertion member. This is a method of pressing and compressing the coil end in the outer frame member with the press member.

  According to the present invention, it is possible to realize a miniaturization jig and a miniaturization method that have a simple configuration and can easily compress a coil end.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
Embodiment 1 FIG.
FIG. 1 illustrates a method for miniaturizing a motor using the miniaturization jig according to Embodiment 1 of the present invention. Here, the motor to be miniaturized has a substantially cylindrical stator 1. The stator 1 has an iron core 2 formed in a substantially cylindrical shape, and a coil 3 wound and held around the iron core 2, and each iron core 2 has an annular shape as shown in FIG. Is formed by laminating a plurality of electromagnetic steel plates 4 having A plurality (36 in the illustrated example) of slots 5 are formed in the inner peripheral portion of each electromagnetic steel sheet 4, and coils 3 wound in advance are inserted and held in the plurality of slots 5, respectively. At the same time, the coil 3 has coil ends 6 and 7 that protrude from the both ends of the iron core 2 in the axial direction.

  The downsizing jig is inserted into the outer frame member 9, an insertion member 8 assembled to the stator 1, an annular outer frame member 9 disposed so as to surround the outer peripheral portion of one coil end 6, and the like. And a pressing member 10. The insertion member 8 has a columnar portion 12 that is inserted and arranged inside the stator 1 and has a recess 11 formed at the center of the upper end thereof. The insertion member 8 has an annular portion 13 formed so as to be positioned concentrically with the columnar portion 12 at a predetermined interval from the outer periphery of the lower portion of the columnar portion 12. An annular groove 14 is formed between the annular portion 13. At the center of the press member 10, a convex portion 15 that protrudes downward and has a shape corresponding to the concave portion 11 of the columnar portion 12 of the insertion member 8 is formed. A pressing surface 16 is formed.

  Note that the outer peripheral edge of the upper end of the columnar portion 12 of the insertion member 8 is formed to have a curved cross-sectional shape as shown in FIG.

When the motor is downsized using the downsizing jig having the above-described configuration, first, the columnar portion 12 of the insertion member 8 with the insertion member 8 placed on a fixed surface (not shown). When the stator 1 is fitted to the coil member 7 from above, the coil end 7 positioned at the lower part of the stator 1 is accommodated in the groove 14 of the insertion member 8, and the iron core 2 of the stator 1 is connected to the annular portion of the insertion member 8. The stator 1 is held by engaging with the upper end of 13. At this time, the upper end of the columnar portion 12 is configured to be positioned at an intermediate portion in the length direction in the inner peripheral portion of the coil end 6 positioned at the upper portion of the stator 1.
After the stator 1 is assembled to the insertion member 8 in this way, when the outer frame member 9 is arranged on the outer peripheral portion of the coil end 6 located on the upper portion of the stator 1, the lower end portion of the outer frame member 9 is the stator 1. The outer frame member 9 is held by engaging with the iron core 2.

  Next, when the press member 10 is inserted into the outer frame member 9 from the convex portion 15 side and the press member 10 is pushed downward using a press machine or the like not shown in the state, the convex portion of the press member 10 is obtained. 15 is inserted into the recess 11 at the upper end of the columnar portion 12 of the insertion member 8, and the coil end 6 in the outer frame member 9 is pressed downward by the pressing surface 16 of the pressing member 10. Since the outer peripheral portion of the coil end 6 is regulated by the outer frame member 9 and the inner peripheral portion of the coil end 6 is regulated by the columnar portion 12 of the insertion member 8, the coil end 6 is compressed in the axial direction. At the same time, the coil end 6 is compressed while a part of the coil end 6 enters the space formed between the upper end of the columnar portion 12 of the insertion member 8, the pressing surface 16 of the pressing member 10, and the outer peripheral surface of the convex portion 15 of the pressing member 10. Is done. As a result, as shown in FIG. 4, the coil end 17 is compression-molded into a shape bent toward the inside of the stator 1, and thus the height of the coil end 17 protruding in the axial direction can be kept low. .

  After the compression is completed, the outer frame member 9 and the press member 10 are removed from the stator 1 and the stator 1 is removed from the insertion member 8, and the stator 1 is accommodated in a predetermined housing 18 as shown in FIG. At the same time, a rotor 19 is arranged inside the stator 1, and a rotary shaft 20 formed integrally with the rotor 19 is rotatably supported by end brackets 23 and 24 via bearings 21 and 22. In this way, the motor is manufactured.

As described above, a small motor can be realized by suppressing the height of the coil end 17 in the axial direction by compression molding.
The rotor 19 has cooling fins 25 protruding from the end corresponding to the coil end 7 that is not compression molded.

Since the insertion member 8 having the columnar portion 12 disposed on the inner side of the stator 1 is composed of one member, the structure is simple and can be easily created.
Further, by fitting the stator 1 to the columnar portion 12 of the insertion member 8 from above, the columnar portion 12 is disposed inside the stator 1 and after the compression is completed, the stator 1 is moved upward from the columnar portion 12. It can be removed by simply pulling it out and can be easily attached and detached. Similarly, the outer frame member 9 and the press member 10 are also easy to attach and detach, so that the entire compression operation can be easily performed.

Since the outer peripheral edge of the upper end of the columnar portion 12 of the insertion member 8 is formed to have a curved cross-sectional shape, it is possible to prevent the coil of the coil end 17 from being damaged at that portion during compression molding.
Since the coil member 17 is compressed by the pressing surface 16 of the press member 10 while the convex portion 15 of the press member 10 is fitted into the concave portion 11 at the upper end of the columnar portion 12 of the insertion member 8, the press member 10 is prevented from rotating. The coil end 17 can be compressed by smoothly pushing the member 10 along the axial direction of the outer frame member 9.

Embodiment 2. FIG.
Next, with reference to FIGS. 6A and 6B, a method for miniaturizing the motor using the miniaturization jig according to Embodiment 2 of the present invention will be described. In this second embodiment, the entire size of the outer peripheral portion of the stator 1 is fixed to the iron core 2 of the stator 1 in place of the outer frame member 9 and the insertion member 8 in the downsizing jig of the first embodiment. It has an annular outer frame member 31 to be covered and an insertion member 33 in which an annular step 32 is formed on the outer periphery of the lower end of the columnar portion 12. The step 32 of the insertion member 33 has a diameter that can be accommodated in the outer frame member 31.
This miniaturization jig also has the press member 10 as in the first embodiment, and the concave portion 11 corresponding to the convex portion 15 of the press member 10 is formed at the center of the upper end of the columnar portion 12 of the insertion member 33. Has been.

  First, as shown in FIG. 6A, when the outer frame member 31 is fixed to the outer peripheral portion of the iron core 2 of the stator 1, the outer peripheral portions of the upper and lower coil ends 6 and 7 of the stator 1 are respectively external. Covered by the frame member 31. Next, when the stator 1 and the outer frame member 31 are fitted to the columnar portion 12 from above with respect to the insertion member 33 placed on a fixed surface (not shown), the column is positioned below the stator 1. The coil end 7 is in a space defined by the outer peripheral surface of the columnar portion 12 of the insertion member 33, the lower end surface of the iron core 2 of the stator 1, the inner peripheral surface of the outer frame member 31, and the upper surface of the step portion 32. And is in contact with the upper surface of the step 32 of the insertion member 33.

  Thereafter, when the press member 10 is inserted into the outer frame member 31 from above and the press member 10 is pushed downward using a press machine (not shown) or the like, the convex portion 15 of the press member 10 becomes the columnar portion of the insert member 33. 12 is inserted into the concave portion 11 at the upper end, and the pressing surface 16 of the pressing member 10 presses the coil end 6 positioned at the upper portion of the stator 1 downward. As a result, the coil end 6 is compressed, and the iron core 2 and the outer frame member 31 of the stator 1 are integrally slid downward, so that the lower end surface of the iron core 2 of the stator 1 and the step 32 are The coil end 7 below the stator 1 is compressed between the upper surface. At this time, since the outer peripheral portion of the coil end 7 is regulated by the outer frame member 31 and the inner peripheral portion of the coil end 7 is regulated by the columnar portion 12 of the insertion member 33, the coil end 7 is compressed in its axial direction. Will be.

  Thus, by pushing the pressing member 10 downward, both the coil ends 6 and 7 located at the upper and lower portions of the stator 1 are simultaneously compressed, and as shown in FIG. 6B, the stator 1 The coil end 34 having a shape bent toward the inner side thereof and the coil end 35 compressed in the axial direction thereof are formed. Accordingly, it is possible to suppress the protruding height of both the coil ends 34 and 35 in the axial direction to be low.

  After the compression is completed, the outer frame member 31 and the press member 10 are removed from the stator 1 and the stator 1 is removed from the insertion member 33, and the stator 1 is accommodated in the housing as in the first embodiment. A motor can be manufactured by arrange | positioning a rotor rotatably inside the stator 1. As shown in FIG.

Since the insertion member 33 is composed of a single member, the structure is simple and can be easily created. The insertion member 33, the outer frame member 31, and the press member 10 are easy to attach and detach. It can be done easily. Therefore, the same effect as in the first embodiment can be obtained.
In addition, in the second embodiment, not only the coil end 34 at the upper part of the stator 1 but also the coil end 35 at the lower part of the stator 1 can be kept low in the axial direction. It is possible to

In Embodiments 1 and 2 described above, the height of the coil end protruding in the axial direction can be adjusted by managing the magnitude of the press pressure by a press machine (not shown) or the like.
In order to enhance the cooling effect of the motor in the first and second embodiments, for example, in the motor shown in FIG. 5, a duct is formed in the end brackets 23 and 24, etc., and an external fan is connected to the duct. A gas as a cooling medium can be forced to flow through the housing 18 to cool it.
Oil or the like can be used as the cooling medium. In this case, the oil or the like can be forcedly circulated in the housing 18 using an external pump instead of the external fan for cooling. Thus, when oil etc. are used, the fin 25 of the rotor 19 edge part can be abbreviate | omitted, and the physique of a motor can be reduced further.

The number of slots 5 in the iron core 2 is not limited to 36.
Further, the motors of the first and second embodiments can be used as a permanent magnet type synchronous motor or the like.

It is sectional drawing which shows a mode that the jig | tool for size reduction which concerns on Embodiment 1 of this invention was assembled | attached to the stator. FIG. 3 is a diagram showing an electromagnetic steel plate used for the iron core of the stator in the first embodiment. 3 is an enlarged cross-sectional view showing a structure of an upper end portion of an insertion member in Embodiment 1. FIG. It is sectional drawing which shows a mode that the coil end was compression-molded with the jig for size reduction which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the structure of the motor reduced in size by the jig for size reduction which concerns on Embodiment 1 of this invention. A mode that a coil end is compression-molded using the jig for size reduction concerning Embodiment 2 of this invention is shown, (a) is a sectional view showing before compression, and (b) is a sectional view showing after compression. is there.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Stator, 2 Iron core, 3 Coil, 4 Magnetic steel plate, 5 Slot, 6, 7 Coil end, 8, 33 Insert member, 9, 31 Outer frame member, 10 Press member, 11 Recessed part, 12 Columnar part, 13 Ring part , 14 Groove, 15 Convex, 16 Press surface, 17, 34, 35 Compression molded coil end, 18 Housing, 19 Rotor, 20 Rotating shaft, 21, 22 Bearing, 23, 24 End bracket, 25 Fin, 32 Stepped.

Claims (2)

In a jig for miniaturizing a motor having a stator having a structure in which a coil is wound around a substantially cylindrical iron core,
One insertion member inserted and arranged inside the stator along the axial direction of the stator and having a recess formed at the center of the tip;
An annular outer frame member disposed so as to surround at least one of the outer ends of the coil ends protruding from the iron core to both axial ends thereof;
A convex portion corresponding to the concave portion of the insertion member is formed at the center of the distal end, and an annular pressing surface is formed on the outer peripheral portion of the convex portion, and the convex portion is inserted inside the outer frame member. A pressing member that presses and compresses the coil end in the outer frame member with the pressing surface by being moved toward the insertion member so as to be fitted into the concave portion of the insertion member. Jig for miniaturization of motor. A motor miniaturization method using the miniaturization jig according to claim 1,
The insertion member is inserted and arranged inside the stator along the axial direction of the stator,
The outer frame member is arranged so as to surround at least one outer periphery of the coil ends protruding from the iron core to both ends in the axial direction,
The press member is inserted into the outer frame member and moved toward the insertion member, whereby the coil end in the outer frame member is pressed and compressed by the press member. Miniaturization method.

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