JP2005057886A - Stator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stator capable of enhancing convenience by increasing the degree of freedom in installing a position or a layout without requiring any separate fixing and holding member. <P>SOLUTION: The stator comprises a stator segment 2A composed of pole teeth 3A and a yoke 3B and having a coupling part 16 on the side face, and a stator segment 2B composed of the pole teeth 3A, the yoke 3B and a fastening part 14 provided on the yoke 3B and having the coupling part 16 on the side face. The stator segments 2A and 2B are coupled through the coupling part 16 such that the stator segment 2B is located at the fastening position of the stator 10A and the stator segment 2A is located at a non-fastening position. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a stator formed by connecting a plurality of laminated cores.

  As a conventional stator, in order to increase the density of the windings and save space at the ends of the windings, a plurality of stator pieces constituting the stator are wound, and the stator pieces are connected in a ring shape. Proposed. For example, Patent Document 1 proposes a stator in which stator pieces made of laminated iron cores are connected and the connecting surfaces are welded.

Then, as shown in FIG. 7, there is known a technique in which the stator 30 obtained by welding the connecting surfaces 33 of the stator pieces 31 is fixed to a cylindrical fixing holder 32 by press-fitting or shrinking. . Further, as shown in FIG. 8, a stator 30 that has been subjected to welding processing and a rotor 36 is sandwiched between a pair of housings 34 and 35 and fixed.
JP-A-6-105487

However, in the conventional technology, if the stator itself has a holding function, a high stress is generated in the welded portion of the connecting surface that connects the stator pieces, so that a high welding quality is required to ensure durability against the stress. There is a problem that the processing load is large and the cost is high.
In addition, if a member (for example, a holder) for fixing and holding the stator is provided separately from the stator, the number of parts and the necessary space increase, so that the installation position and layout are limited and the convenience is impaired. is there.
Accordingly, an object of the present invention is to provide a stator that does not require a separate fixing and holding member, can expand the installation position and the degree of freedom of layout, and can improve convenience.

  The invention according to claim 1 is a first laminated structure including a tooth (for example, magnetic pole tooth 3A in the embodiment) and a back yoke (for example, yoke portion 3B in the embodiment), and having a connecting portion on a side surface of the back yoke. An iron core (for example, the stator piece 2A in the embodiment), a tooth, a back yoke, and a fastening portion (for example, the fastening portion 14 in the embodiment) provided on the back yoke, and a connecting portion on the side surface of the back yoke. And a second laminated iron core (for example, the stator piece 2B in the embodiment) having the second laminated iron core at a fastening portion of the stator and the first laminated iron core at a non-fastened portion. The first and second laminated iron cores are connected by a connecting portion (for example, the connecting portion 16 in the embodiment) so as to be positioned respectively.

  According to this invention, the stator in which the second laminated core and the first laminated core are connected by the connecting portion is fastened to another device by the fastening portion of the second laminated core. Therefore, it is possible to eliminate the need to provide another fixing and holding member on the outer peripheral portion of the stator. Accordingly, the weight of the stator can be reduced, the number of parts can be reduced, and the work load can be reduced. In addition, the fastening position with other equipment can be freely changed according to the number and combination of the first laminated core and the second laminated core, so the fixed position and the fixed position depend on the mounting shape and vibration conditions. The number can be freely configured, and the ease of assembly and layout are improved.

The invention according to claim 2 is the invention according to claim 1, wherein the connecting portion of the first and second laminated cores is an engaging protrusion (for example, the engagement in the embodiment) protruding in the circumferential direction. The joint protrusions 18) and the engagement recesses (for example, the engagement recesses 17 in the embodiment) that engage with the engagement protrusions are alternately stacked in a predetermined number. .
According to this invention, since the engagement stress applied to the adjacent laminated cores can be equalized, the formability of the fastened laminated cores can be improved. Further, since the movement of the connected iron cores in the radial direction can be restricted, the iron cores can be positioned with each other, and the shape of the connected stator can be maintained in a predetermined shape, thereby improving the assembling accuracy.

The invention according to claim 3 is the invention according to claim 1 or 2, wherein the connecting portions of the adjacent laminated cores are welded in the axial direction of the stator (for example, the welded portion 11 in the embodiment). ).
According to this invention, by fastening the connecting portion, the fastening force at the connecting portion can be improved, and the formability is improved. In particular, when the connecting portion is composed of the engaging convex portion and the engaging concave portion, since the load can be received by the convex portion and the concave portion, the stress applied to the welded portion is greatly reduced. Since the accuracy of the required welding process can be reduced, the work load and the accuracy process can be improved.

The invention according to claim 4 is characterized in that a housing is provided on the outer peripheral portion of the stator, the fastening portion is fastened to a fastening receiving portion provided in the housing, and the housing provided with the stator is mounted between the engine and the transmission. And
According to this invention, since it can mount stably between the said engine and the said transmission, mounting property can be improved.

According to the first aspect of the present invention, it is possible to reduce the weight of the stator, reduce the number of parts, and reduce the work load. Further, the fixed position and the fixed number can be freely configured depending on the mounting shape and vibration conditions, and the assembling property and the degree of freedom in layout are improved.
According to the invention described in claim 2, the formability of the fastened laminated iron core can be improved, and the assembly accuracy can be improved.
According to the invention described in claim 3, the fastening force at the connecting portion can be improved, and the moldability can be further improved.
According to the invention described in claim 4, since it can be stably mounted between the engine and the transmission, the mountability can be improved.

  Hereinafter, a stator according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an assembly process of a stator according to the first embodiment of the present invention. As shown in the figure, the stator core 1 is formed in an annular shape by arranging a plurality of stator pieces 2 in the circumferential direction. In the present embodiment, two types of stator pieces 2 </ b> A and 2 </ b> B are used as the stator piece 2.

The stator piece 2 </ b> A is formed with a plurality of magnetic pole teeth 3 </ b> A projecting inward in the radial direction of the stator core 1 and a yoke portion 3 </ b> B extending in the circumferential direction of the stator core 1. The stator piece 2A is configured by laminating substantially T-shaped electromagnetic steel plates in the axial direction of the stator.
In addition to the magnetic teeth 3A and the yoke portion 3B, the stator piece 2B is formed with a fastening portion 14 for fastening with another device on the outer peripheral side of the yoke portion 3B. The stator piece 2B is configured by laminating substantially umbrella-shaped electromagnetic steel plates in the axial direction of the stator.

  A bolt insertion hole (not shown) is formed in the upper center side of the fastening portion 14 of the stator piece 2B, and a fastening bolt 12 is attached to the insertion hole. Fastened to the housing 19). Further, positioning holes 15 are formed in the fastening portion 14 on both sides of the bolt insertion hole forming position. Thereby, alignment of each laminated steel plate can be performed.

  The magnetic steel sheets constituting the stator pieces 2A, 2B are formed by laminating directional magnetic steel sheets having directionality such as silicon steel sheets. For example, in the magnetic teeth 3A, the easy magnetization direction is set to the radial direction of the stator core 1, The yoke part 3 </ b> B has an easy magnetization direction set in the circumferential direction of the stator core 1.

A cylindrical insulating bobbin 6 made of a pair of insulating piece pieces is mounted on the radial side surfaces of the stator pieces 2A and 2B. A stator winding 5 made of a conductive wire such as copper is wound around the side surface of the insulating bobbin 6 in a concentrated manner.
A locking portion 4 that protrudes outward in the circumferential direction is provided at the inner peripheral end of the magnetic pole teeth 3A of the stator pieces 2A and 2B to prevent the stator winding 5 from falling off inward in the radial direction. ing.

  Further, the stator pieces 2A, 2B are provided with connecting portions 16 connected to the adjacent stator pieces 2A, 2B on the circumferential side surfaces of the respective yoke portions 3B. As shown in FIG. 2, the connecting portions 16 of the stator pieces 2 </ b> A and 2 </ b> B include an engaging convex portion 18 protruding in the circumferential direction and an engaging concave portion 17 engaging with the engaging convex portion 18 every predetermined number. Are alternately stacked.

  If it does in this way, since the engagement stress added to the adjacent stator pieces 2A and 2B can be equalized, the moldability of the fastened stator can be improved. Further, since the movement of the connected stator pieces 2A and 2B in the radial direction can be restricted, the adjacent stator pieces 2A and 2B can be positioned. Therefore, the shape of the connected stator 10A can be maintained in a predetermined shape, and the assembly accuracy is improved.

  Further, the stator pieces 2A and 2B configured as described above are connected by the connecting portion 16 so that the stator piece 2B is located at the fastening portion of the stator 10A and the stator piece 2A is located at the non-fastened portion. Thereby, since it can be made to fasten with another apparatus (for example, the housing 19 mentioned later) by the fastening part 14 of the stator piece 2B, it is not necessary to provide the member for fixation holding | maintenance, such as a holder, in the outer peripheral part of 10 A of stators. Accordingly, the weight of the stator 10A can be reduced, the number of parts can be reduced, and the work load can be reduced.

  Moreover, in this Embodiment, the connection part 16 of the said adjacent stator pieces 2A and 2B is welded to the axial direction of the said stator, and the welding part 11 is formed. Thus, by welding the connecting portion 16, the fastening force at the connecting portion 16 can be improved, and the formability is improved. Moreover, since the connection part 16 is engaged by the engagement recessed part 17 and the engagement convex part 18, the stress concerning the part to weld can be reduced significantly. Thereby, since the precision of a required welding process can be made low, a work burden and an accuracy process can be improved.

FIG. 3 is a front view showing the assembled stator 10A. In this case, among the six stator pieces 2B provided with the fastening portion 14, two stator pieces 2B are positioned on the upper left side and the lower right side, respectively, thereby particularly improving the durability on the upper left side and the lower right side. ing.
FIG. 4 is a front view showing a state in which the housing 19 is mounted on the outer periphery of the stator 10A. The fastening portion 14 is fastened to the fastening receiving portion 20 provided in the housing 19 to the fastening portion 14 of the stator 10A. When the stator 10A mounted on the housing 19 is interposed between the engine and the transmission, the stator 10A can be mounted in a stable state, and mountability can be improved. In addition, when interposing between an engine and a transmission, a rotor is mounted on the radially inner side of the stator 10A.

Examples of stators 10B and 10C formed by a combination of stator pieces 2A and 2B in the present embodiment are shown in FIGS.
FIG. 5 shows a stator 10B in which four stator pieces 2B provided with fastening portions 14 are evenly arranged at intervals of approximately 90 degrees. If it does in this way, fastening force can be equally exerted on each stator piece 2A, 2B.
FIG. 6 shows a stator 10 </ b> C in which six stator pieces 2 </ b> B provided with the fastening portions 14 are arranged equally at intervals of approximately 60 degrees. If it does in this way, the fastening force which acts on each stator piece 2A, 2B can be further strengthened equally.

  In this way, the fastening position and durability with other devices can be freely adjusted according to the number and combination of the stator pieces 2A and the stator pieces 2B. And a fixed number can be freely configured, and the ease of assembly and layout are improved.

It is a perspective view which shows the assembly process of the stator in the 1st Embodiment of this invention. It is a perspective view which shows the connection process of an adjacent stator piece. It is a front view which shows an example of the assembled stator. It is a front view of the stator with which the housing was mounted | worn. It is a front view which shows the other example of the assembled stator. It is a front view which shows the other example of the assembled stator. It is a perspective view which shows the assembly process of the conventional stator. It is sectional drawing of the motor provided with the other stator in the past.

Explanation of symbols

2A, 2B Stator piece 3A Magnetic pole teeth 3B Back yoke 11 Welding portion 16 Connection portion 17 Engaging recess 18 Engaging projection

Claims (4)

A first laminated iron core comprising teeth and a back yoke, and having a connecting portion on a side surface of the back yoke;
A stator comprising a second laminated iron core comprising a tooth, a back yoke, and a fastening portion provided on the back yoke, and having a connecting portion on a side surface of the back yoke,
The first and second laminated cores are connected by a connecting portion so that the second laminated core is located at a fastening portion of the stator and the first laminated iron core is located at a non-fastened portion. Stator.   Each of the first laminated core and the second laminated core includes an engaging convex portion protruding in the circumferential direction and an engaging concave portion engaging with the engaging convex portion for each predetermined number of connection portions. The stator according to claim 1, wherein the stator is alternately stacked.   The stator according to claim 1 or 2, wherein a connecting portion between the adjacent laminated cores is welded in an axial direction of the stator. A housing is provided on an outer peripheral portion of the stator, the fastening portion is fastened to a fastening receiving portion provided on the housing, and the housing provided with the stator is mounted between an engine and a transmission. The stator according to any one of claims 1 to 3.

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