JP5292134B2 - Stator and motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stator for achieving high efficiency and suppressing an increase in manufacturing cost when split stator cores are used. <P>SOLUTION: In the stator formed by coupling a plurality of split stator cores, a first coupling hole 31 and a second coupling hole 32 for arranging a coupling member 50 for coupling adjacent split stator cores are formed on a yoke portion of each of the split stator cores, the adjacent split stator cores are coupled in such a way that one end of the coupling member is rotatably inserted into a first coupling hole of one split stator core 11A and the other end of the coupling member is rotatably inserted into a second coupling hole of the other split stator core 11B, yokes abut to or separated from each other while the adjacent split stator cores are coupled by the coupling member, and the position where the first coupling hole is formed in the split stator core is different in the diameter direction from the position where the second coupling hole is formed in the state that the yoke portions abut to each other. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a stator and a motor.

  Generally, an inner rotor type motor is configured such that a rotor (rotor) is disposed in a space formed inside an annular stator (stator), and the rotor is rotatable with respect to the stator. . As a stator of such a motor, a plurality of stator core pieces each having a yoke portion and a tooth portion are laminated to form a divided stator core, the divided stator cores are connected in an annular shape to form a stator core, and a coil is formed on the teeth portion. What was wound is proposed (for example, refer to patent documents 1).

  In Patent Document 1, a plurality of divided laminated cores includes a first divided core piece and a second divided core piece that are stacked and joined to each other, and a connection end portion of the first divided core piece in one of the divided laminated cores adjacent to each other. Of the other split laminated core is loosely fitted into the long hole of the connecting end of the second split core piece to connect a predetermined number of split laminated cores endlessly, and the ring-shaped yoke part can be expanded in diameter. It is configured.

Japanese Patent Laid-Open No. 2002-281697

  By the way, since the stator of Patent Document 1 has a portion where the long hole and the protrusion are fitted on the magnetic path, the magnetic path becomes narrow in the region where the long hole is formed, the iron loss increases, and the efficiency decreases. End up. In addition, since the long holes and the protrusions are alternately stacked, two types of divided core pieces are required, and the manufacturing cost increases.

  Therefore, the present invention has been made in view of the above circumstances, and provides a stator that can achieve high efficiency and can suppress an increase in manufacturing cost when a split stator core is used. is there.

  In order to solve the above-mentioned problem, the invention described in claim 1 is a stator core piece (for example, a stator core piece (for example, a yoke 13 in the embodiment)) having a teeth portion (for example, the tooth 15 in the embodiment) and a yoke portion (for example, the yoke 13 in the embodiment). A stator formed by connecting a plurality of divided stator cores (for example, divided cores 11 in the embodiment) formed by laminating a plurality of flat steel plates 21 in the embodiment (for example, stator 1 in the embodiment). ), In the yoke portion of the split stator core, a first connection hole (for example, the first connection in the embodiment) in which a connection member (for example, the connection member 50 in the embodiment) for connecting adjacent split stator cores can be arranged. Hole 31) and a second connecting hole (for example, the second connecting hole 32 in the embodiment) are formed and are adjacent to each other. In the split stator core, one end of the connecting member is rotatably inserted into the first connecting hole of one split stator core (for example, the split core 11A in the embodiment), and the other end of the connecting member is the other split stator core. (For example, the split core 11B in the embodiment) is rotatably inserted into the second connection hole, and the yoke parts are in contact with each other in a state where the adjacent split stator cores are connected by the connection member. The position where the first connection hole is formed and the position where the second connection hole is formed in the split stator core are different in the radial direction in a state where the yoke portions are in contact with each other. It is characterized by that.

  According to a second aspect of the present invention, in the circumferential one end portion (for example, the one end portion 33 in the embodiment) of the divided stator core on the side where the first connection hole is formed, outward in the circumferential direction. A protruding first convex portion (for example, the first convex portion 35 in the embodiment) and a first concave portion that is recessed inward in the circumferential direction (for example, the first concave portion 36 in the embodiment) are formed, and the split stator core A second convex portion projecting outward in the circumferential direction (for example, the embodiment) is formed at the other circumferential end portion (for example, the other end portion 34 in the embodiment) of the yoke portion on the side where the second connection hole is formed. And the second concave portion recessed inward in the circumferential direction (for example, the second concave portion 37 in the embodiment), and the first convex portion and the second concave portion are engaged with each other. And the first concave portion and the second convex portion are As a result, the yoke portions of the adjacent split stator cores come into contact with each other, the first connection hole is formed in the first convex portion, and the second connection hole is formed in the second convex portion. It is characterized by being.

  According to a third aspect of the present invention, the connecting member is a first polygonal pin formed in a polygon inscribed in the circular first connecting hole (for example, the first polygonal pin 451 in the embodiment). A second polygonal pin formed in a polygon inscribed in the circular second connection hole (for example, the second polygonal pin 452 in the embodiment), the first polygonal pin, and the second multiple And a connecting portion (for example, the connecting plate 53 in the embodiment) connecting between the square pins.

  According to a fourth aspect of the present invention, the connection member includes a first circular pin (for example, the first pin 51 in the embodiment) formed in a circular shape inscribed in the polygonal first connection hole, A second circular pin (for example, the second pin 52 in the embodiment) formed in a circular shape inscribed in the second connection hole having a square shape, and a connecting portion that connects between the first circular pin and the second circular pin (For example, the connecting plate 53 in the embodiment).

  According to the fifth aspect of the present invention, a first locking groove (for example, the first locking groove 41 in the embodiment) is formed at one end in the circumferential direction of the yoke portion of the divided stator core, and the other circumferential end is formed. A second locking groove (for example, the second locking groove 42 in the embodiment) is formed in the portion, and the first locking groove and the second locking groove are in a state where the adjacent divided stator cores are in contact with each other. Are arranged so that a locking hole (for example, the locking hole 43 in the embodiment) is formed, and a locking pin (for example, the locking pin 45 in the embodiment) can be inserted into the locking hole. It is characterized by having.

  According to a sixth aspect of the present invention, in the state where the adjacent divided stator cores are in contact with each other, the locking hole is provided at a position overlapping the connecting member in a front view, and the locking pin penetrates the connecting member. And it is comprised so that insertion in the said locking groove is possible.

  The invention described in claim 7 is characterized in that the locking pin has an urging force capable of pressing the inner peripheral surface of the locking hole.

  The invention described in claim 8 is characterized in that portions of the connecting member inserted into the first connecting hole and the second connecting hole are formed in a hollow shape.

  The invention described in claim 9 is characterized in that a wedge (for example, the wedge 255 in the embodiment) is press-fitted into the hollow portion (for example, the cavity portions 253 and 254 in the embodiment) formed in the hollow shape. Yes.

  The invention described in claim 10 is characterized in that an annular end face plate (for example, the end face plate 70 in the embodiment) is provided on both end faces in the axial direction of the divided stator cores connected in an annular shape. .

  According to an eleventh aspect of the present invention, in the state in which the divided stator core is connected and held in an annular shape, the connecting member is arranged on an extension line radially outward of the teeth portion. One connection hole and the second connection hole are formed.

  In the invention described in claim 12, the divided stator core is divided into a plurality of parts in the axial direction, and a connecting plate (for example, the intermediate connecting plate 25 in the embodiment) is interposed between the divided stator cores. It is characterized by.

  The invention described in claim 13 is a motor including any one of the above-described stators, wherein the stator is in the housing relative to a housing (for example, the motor housing 23 in the embodiment) that can store the stator. It is characterized by being press-fitted and fixed to the inner surface of the housing.

  According to the first aspect of the present invention, since the interval between adjacent tooth portions can be increased in a state where a plurality of divided stator cores are connected, insertion of windings arranged in the tooth portions is facilitated. In addition, since the diameter can be increased even after a plurality of divided stator cores are connected to form an annular shape, the winding can be wound around the tooth portion using a general inserter device, and other various windings It can also cope with the wire method. Therefore, the winding process of the winding can be facilitated, and the winding space can be increased by increasing the spacing between the teeth, so that the space factor of the winding can be improved. Can be achieved. Further, since the adjacent divided stator cores are connected by the connecting member, it is possible to prevent a gap from being generated in the connecting portion and to prevent an increase in iron loss. Further, since the plurality of divided stator cores can have the same shape, an increase in manufacturing cost can be suppressed.

  According to the second aspect of the present invention, the first connecting hole is formed in the first convex portion, and the second connecting hole is formed in the second convex portion, thereby separating the yoke portions of the adjacent divided stator cores. Can be separated more greatly. That is, since the space | interval of adjacent teeth parts can be ensured large, insertion of a coil | winding can be performed easily. Moreover, since the winding can be reliably arranged between the adjacent tooth portions, the space factor of the winding can be improved. Therefore, the motor can be made smaller and more efficient.

  According to the third aspect of the present invention, the first connection hole and the first polygon pin and the second connection hole and the second polygon pin are connected by light press-fitting that partially contacts each other. Therefore, it becomes easy to hold the shape due to the frictional force between them, and the winding winding work can be easily performed in an annular diameter-expanded state or a belt-like expanded state.

  According to the invention described in claim 4, since the first connection hole and the first circular pin and the second connection hole and the second circular pin are connected by light press-fitting partially contacting each other, It becomes easy to maintain the shape by the frictional force between the two, and the winding work can be easily performed in an annular diameter-expanded state or a belt-shaped expanded state.

  According to the fifth aspect of the present invention, when the plurality of split stator cores are connected in an annular shape, the annular state can be reliably maintained with a simple configuration in which the locking pin is inserted into the locking hole. it can. Therefore, an increase in weight can be suppressed, and a stator that can improve production efficiency can be provided.

  According to the sixth aspect of the present invention, when the plurality of split stator cores are connected in an annular shape, the annular state can be reliably maintained with a simple configuration in which the locking pin is inserted into the locking hole. it can. Further, since the connecting member can be supported and fixed by the locking pin, the annular state can be more reliably maintained. Therefore, an increase in weight can be suppressed, and a stator that can improve production efficiency can be provided.

  According to the seventh aspect of the present invention, it is possible to absorb misalignment when a plurality of stator core pieces are stacked by giving a biasing force to the locking pin. Therefore, it is possible to manufacture a split stator core in which the teeth portion and the yoke portion are stacked at substantially the same position. As a result, high efficiency of the motor can be achieved.

  According to the invention described in claim 8, since the connecting member can be reduced in weight, the motor can be reduced in weight.

  According to the ninth aspect of the present invention, the connecting member can be reliably connected to the split stator core by press-fitting the wedge into the cavity. Therefore, adjacent divided stator cores can be smoothly contacted and separated.

  According to the tenth aspect of the present invention, it is possible to hold the annular state more firmly by attaching the end face plate to the divided stator cores connected in an annular shape.

  According to the eleventh aspect of the invention, since the magnetic flux density is relatively low in the divided stator core on the radially outward extension line of the tooth portion in the yoke portion, the connecting member is disposed in that region. Thus, it is possible to prevent a reduction in motor efficiency.

  According to the twelfth aspect of the present invention, when the axial length of the divided stator core is long, the locking pin may be bent or fall down, and the shape may be collapsed when connected in an annular shape. By sandwiching them, the bending and falling of the locking pin can be restricted, and the plurality of divided stator cores can be reliably connected in an annular shape.

  According to the invention described in claim 13, the stator is formed using the split stator core, and includes a stator that can achieve high efficiency and can suppress an increase in manufacturing cost. As a result, the efficiency of the motor can be increased, and an increase in the manufacturing cost of the motor can be suppressed.

It is a perspective view of the stator in the embodiment of the present invention. It is a front view (at the time of diameter reduction) of the stator core in the embodiment of the present invention. It is a front view of the split core in the embodiment of the present invention. It is a perspective view of the connection member in the embodiment of the present invention. It is a front view which shows the state with which the split core in embodiment of this invention was connected in the separation state. It is a front view which shows the state with which the division | segmentation core in embodiment of this invention was connected in the contact state. It is a front view (at the time of diameter expansion) of the stator core in the embodiment of the present invention. It is a figure (1) explaining the manufacturing method of the stator in embodiment of this invention, and is a figure which shows the state which has arrange | positioned the split core to the annular | circular shape. It is FIG. (2) explaining the manufacturing method of the stator in embodiment of this invention, and is a figure which shows the state which connected the division | segmentation core to the annular | circular shape and comprised the stator core. It is FIG. (3) explaining the manufacturing method of the stator in embodiment of this invention, and is a figure which shows the state which wound the coil around the stator core. It is FIG. (4) explaining the manufacturing method of the stator in embodiment of this invention, and is a figure which shows the state which diameter-reduced the stator core by which the coil was wound. It is a figure (5) explaining the manufacturing method of the stator in embodiment of this invention, and is a figure which shows the process of press-fitting a stator in a motor housing. It is sectional drawing which follows the AA line of FIG. It is a figure (1) which shows another aspect of the stator in embodiment of this invention. It is a figure (2) which shows another aspect of the stator in embodiment of this invention. It is a figure (3) which shows another aspect of the stator in embodiment of this invention. It is a figure (4) which shows another aspect of the stator in embodiment of this invention. It is a figure (5) which shows another aspect of the stator in embodiment of this invention. It is sectional drawing which follows the BB line of FIG. It is a figure (6) which shows another aspect of the stator in embodiment of this invention. It is a figure (7) which shows another aspect of the stator in embodiment of this invention. It is a figure (8) which shows another aspect of the stator in embodiment of this invention. It is a figure (9) which shows another aspect of the stator in embodiment of this invention. It is a figure (10) which shows another aspect of the stator in embodiment of this invention.

Next, an embodiment of the present invention will be described with reference to FIGS. In the present embodiment, a stator of a motor attached to a vehicle or the like will be described.
FIG. 1 is a perspective view of the stator, and FIG. 2 is a plan view of the stator core. As shown in FIGS. 1 and 2, the stator 1 includes a stator core 10 configured in an annular shape, and a coil 20 wound around a tooth 15 of the stator core 10. A rotor (not shown) is rotatably disposed in a space formed at the center of the annular shape of the stator 1. The “axial direction and radial direction” used in the following description means the direction along the rotational axis of the rotor and the radial direction around the rotational axis, and the “circumferential direction” means an annular rotor and This refers to the circumferential direction of the stator.

  The stator core 10 is configured by connecting a plurality of split cores 11 in an annular shape. The stator core 10 includes a yoke 13 that forms an annular outer periphery, teeth 15 that protrude from the yoke 13 toward the center of the ring, and a tip portion 17 that forms the tip of the teeth 15. A space (hereinafter referred to as a slot 19) is formed between adjacent teeth 15. Then, by arranging the coil 20 in the slot 19, the stator 1 is formed as described above. The adjacent split cores 11 and 11 are connected by a connecting member 50.

  FIG. 3 is a plan view of the split core. As shown in FIG. 3, the split core 11 is configured by laminating a plurality of flat steel plates 21 on which yokes 13, teeth 15, and tip portions 17 are formed. The flat steel plate 21 constituting the divided core 11 can be easily manufactured by press molding. Here, one tooth 15 is formed in one divided core 11. That is, the divided core 11 is divided for each tooth 15.

  Here, the yoke 13 is formed with a first connection hole 31 and a second connection hole 32. Specifically, the first connecting hole 31 is formed on the yoke 13 on the circumferential one end 33 side, and the second connecting hole 32 is formed on the circumferential other end 34 side. In addition, a first convex portion 35 projecting outward in the circumferential direction is formed at the radially outer end portion of the one end portion 33, and is recessed radially inward so as to be continuous with the first convex portion 35. A first recess 36 is formed. On the other hand, a second recessed portion 37 that is recessed inward in the circumferential direction is formed at the radially outer end of the other end portion 34, and protrudes outward in the circumferential direction radially inward so as to be continuous with the second recessed portion 37. A second convex portion 38 is formed. The first connection hole 31 is formed in the first protrusion 35, and the second connection hole 32 is formed in the second protrusion 38.

  Further, a concave first locking groove 41 is formed in the vicinity of the boundary between the first convex portion 35 and the first concave portion 36 in the one end portion 33, and the second concave portion 37 and the second convex portion 38 in the other end portion 34 are formed. A concave second locking groove 42 is formed in the vicinity of the boundary.

  FIG. 4 is a perspective view of the connecting member. As shown in FIG. 4, the connecting member 50 includes a first pin 51 that can be inserted into the first connecting hole 31, a second pin 52 that can be inserted into the second connecting hole 32, a first pin 51, and a second pin. And a connecting plate 53 that rotatably supports 52. That is, the connecting plate 53 is formed with a first through hole 55 through which the first pin 51 can be inserted and a second through hole 56 through which the second pin 52 can be inserted. Further, the connecting plate 53 has a first position at a position corresponding to a locking hole 43 formed by the first locking groove 41 of one adjacent split core 11A and the second locking groove 42 of the other split core 11B. Three through holes 57 are formed. The first connection hole 31 and the first through hole 55 are formed in substantially the same shape, and the second connection hole 32 and the second through hole 56 are formed in substantially the same shape.

  FIG. 5 is a plan view showing the connected state (at the time of separation) of the split cores. As shown in FIG. 5, the left split core 11 </ b> A and the right split core 11 </ b> B are connected by a connecting member 50. Specifically, the split core 11A and the split core 11B are arranged adjacent to each other, and the first connecting hole 31 of the split core 11A and the first through hole 55 of the connecting plate 53 communicate with each other, and the split core 11B The connecting plate 53 is arranged so that the second connecting hole 32 and the second through hole 56 of the connecting plate 53 communicate with each other. Then, while inserting the 1st pin 51 in the 1st through-hole 55, and inserting the 2nd pin 52 in the 2nd through-hole 56, the split core 11A and the split core 11B are connected. In addition, the 1st pin 51 and the 2nd pin 52 are formed in the length substantially the same as the thickness of the division | segmentation core 11, for example.

  The diameter of the first pin 51 is substantially the same as that of the first through hole 55 and the first connection hole 31, and the first pin 51 is in relation to the first through hole 55 and the first connection hole 31. It is configured to be rotatable. On the other hand, the diameter of the second pin 52 is substantially the same as the diameter of the second through hole 56 and the second connection hole 32, and the second pin 52 is in relation to the second through hole 56 and the second connection hole 32. It is configured to be rotatable.

  FIG. 6 is a plan view showing a state in which yokes of adjacent split cores are in contact with each other. As shown in FIG. 6, in order to bring the yoke 13 </ b> A of the split core 11 </ b> A and the yoke 13 </ b> B of the split core 11 </ b> B into contact, the first pin 51 is rotated with respect to the first through hole 55 and the first connection hole 31. By rotating the second pin 52 with respect to the second through hole 56 and the second connection hole 32, the one end portion 33A of the split core 11A and the other end portion 34B of the split core 11B come into contact with each other. Specifically, the first convex portion 35A of the split core 11A and the second concave portion 37B of the split core 11B are in contact with each other, and the first concave portion 36A of the split core 11A and the second convex portion 38B of the split core 11B are in contact with each other. Touch. Further, the locking hole 43 is formed by the first locking groove 41A of the split core 11A and the second locking groove 42B of the split core 11B coming into contact with each other. In a state where the yoke 13A of the split core 11A and the yoke 13B of the split core 11B are in contact, the split core 11A is pressed by press-fitting the locking pin 45 into the third through hole 57 and the locking hole 43 of the connecting plate 53. And the connection state with the split core 11B can be firmly held. The locking pin 45 can be used as a part of the magnetic circuit by using, for example, a soft magnetic material.

  Moreover, in this embodiment, the 2nd connection hole 32 is formed on the radial extension line of the teeth 15, and the 1st connection hole 31 of the split core 11A is in the state which the adjacent split cores 11A and 11B contact | abutted. It arrange | positions on the radial direction extension line | wire of the teeth 15 of the split core 11B. That is, the connecting plate 53 is configured to be positioned on the radial extension line of the tooth 15 of the split core 11B in a state where the adjacent split cores 11A and 11B are in contact with each other.

  As described above, the stator core 10 formed by connecting the split cores 11 in an annular shape by abutting and separating adjacent split cores 11 and 11 is configured such that the diameter thereof can be expanded and contracted. That is, when the split cores 11 are in contact with each other, the diameter is reduced as shown in FIG. 2, and when the split cores 11 are separated from each other, the diameter is increased as shown in FIG. become. That is, the distance between adjacent teeth 15 and 15 increases, and the area of the slot 19 increases.

Next, a procedure for connecting the split cores 11 to form the stator 1 will be described.
First, as shown in FIG. 8, flat steel plates 21 are laminated, a plurality of divided cores 11 having a desired thickness are prepared, and the divided cores 11 are arranged in a substantially annular shape in the same direction. And the adjacent split cores 11 are connected. Specifically, the connecting plate 53 is disposed at a predetermined position between the adjacent split cores 11 and 11, and the first pin 51 and the second pin 52 are inserted into the first connecting hole 31 and the second connecting hole 32. Connect with

  As shown in FIG. 9, the stator core 10 held in an annular shape is formed by attaching the connecting member 50 between all the split cores 11 and 11. At this time, the locking pin 45 is not yet attached.

  Subsequently, the coil 20 is wound around the stator core 10. As shown in FIG. 9, when the coil 20 is wound, the stator core 10 is expanded in diameter. Specifically, the stator core 10 can be expanded in diameter by moving the one end portion 33 and the other end portion 34 of the adjacent split cores 11 and 11 away from each other. By expanding the diameter of the stator core 10, the interval between the adjacent teeth 15, 15 is increased, and a large slot 19 can be secured.

  Therefore, as shown in FIG. 10, the coil 20 can be easily provided in the slot 19. After the desired coil 20 is provided in the slot 19, the stator core 10 is reduced in diameter.

  Specifically, as shown in FIG. 11, an operation opposite to that at the time of the above-described diameter expansion is performed, and movement is performed until one end 33 and the other end 34 of the adjacent split cores 11 and 11 come into contact with each other. Let When the yokes 13, 13 of the adjacent split cores 11, 11 come into contact with each other, the locking pin 45 is press-fitted into the locking hole 43, and the stator 1 is manufactured by firmly holding the annular state of the stator core 10. .

  Then, as shown in FIG. 12, the stator 1 is attached to the motor housing 23 by press-fitting and fixing the stator 1 in the motor housing 23. Moreover, a motor unit can be manufactured by arrange | positioning a rotor and a rotating shaft to the inner peripheral side of the stator 1. FIG.

  According to this embodiment, since the space | interval of adjacent teeth 15 and 15 can be enlarged in the state which connected the some split core 11, the insertion of the coil 20 distribute | arranged to the slot 19 becomes easy. In addition, since the diameter can be increased after the plurality of split cores 11 are connected and formed into an annular shape, the coil 20 can be wound around the tooth 15 using a general inserter device, and other various types The winding method can also be handled. Therefore, the winding process of the coil 20 can be facilitated, and the space between the adjacent teeth 15 and 15 is increased to wind the coil 20, so that the space factor of the coil 20 can be improved, and the motor Can be made more compact and more efficient. Further, since the adjacent split cores 11 are connected by the connecting member 50, it is possible to prevent a gap from being generated in the connecting portion and to prevent an increase in iron loss. Furthermore, since the thing of the same shape can be employ | adopted for the some division | segmentation core 11, the raise of manufacturing cost can be suppressed.

  Moreover, while forming the 1st connection hole 31 in the 1st convex part 35 of the split core 11, and forming the 2nd connection hole 32 in the 2nd convex part 38, the yokes 13 of the adjacent split cores 11 and 11, When 13 is separated, it can be separated largely. That is, since the space | interval of adjacent teeth 15 and 15 can be ensured large, the insertion of the coil 20 can be performed easily. Moreover, since the coil 20 can be reliably arrange | positioned between adjacent teeth 15 and 15, the space factor of the coil 20 can be improved. Therefore, the motor can be made smaller and more efficient.

  In addition, when the plurality of divided cores 11 are connected in an annular shape, the annular state can be reliably maintained with a simple configuration in which the locking pin 45 is inserted into the locking hole 43. Therefore, an increase in weight can be suppressed, and the stator 1 that can improve production efficiency can be provided.

  Further, since the connecting member 50 is supported and fixed by the locking pin 45, the annular state can be held more reliably. Therefore, an increase in weight can be suppressed, and the stator 1 that can improve production efficiency can be provided.

  Furthermore, since the magnetic flux density is relatively low in the split core 11 on the radially outward extension line of the teeth 15 in the yoke 13, the motor efficiency is reduced by arranging the connecting member 50 in that region. Can be prevented.

  And by manufacturing a motor using the stator 1 which employ | adopted the above-mentioned structure, while being able to achieve high efficiency of a motor, the raise of the manufacturing cost of a motor can be suppressed.

The present invention is not limited to the above-described embodiment, and includes various modifications made to the above-described embodiment without departing from the spirit of the present invention. That is, the specific structures and numerical values given in the embodiments are merely examples, and can be changed as appropriate.
For example, in the present embodiment, FIG. 13 shows a cross-sectional view in a state where the adjacent divided cores 11 and 11 are in contact with each other, but when the first pin 51 and the second pin 52 can firmly hold the annular state. As shown in FIG. 14, the locking pin 45 may not be provided.

  Further, as shown in FIG. 15, the first pin 151 and the second pin 152 are directly inserted into the split core 11, and the connecting plate 53 is attached to the heads of the first pin 151 and the second pin 152, thereby connecting members. 150 may be configured.

  Further, as shown in FIG. 16, hollow pins may be employed for the first pins 251 and the second pins 252 of the connecting member 250. By making the pin hollow, the weight of the pin can be reduced. Note that, as shown in FIG. 17, a wedge 255 may be press-fitted into the hollow portions 253 and 254 of the first pin 251 and the second pin 252. Further, by using the wedge 255 formed of a soft magnetic material, the portion into which the wedge 255 is driven can be configured as a part of the magnetic circuit.

  In addition, as shown in FIGS. 18 and 19, a connecting member 350 using a biasing member 345 instead of the locking pin 45 may be employed. By inserting the urging member 345 into the locking hole 43 and maintaining the annular state, it is possible to easily absorb a stacking error caused by stacking the flat steel plates 21 and to increase the efficiency of the motor. . Although not shown in the figure, an adhesive or solder may be poured into the locking hole 43 so that the state where the divided cores 11 are in contact with each other may be maintained. Moreover, you may make it hold | maintain an annular | circular state by welding the contact location of the outer peripheral edge part in the state which the split cores 11 contact | abutted.

  Further, as shown in FIG. 20, the first polygonal pin 451 formed in a polygon inscribed in the first connection hole 31 circular in plan view and the second connection hole 32 in circular shape in plan view are inscribed. The connecting member 450 may be configured by the second polygonal pin 452 formed of a polygon and the connecting plate 53. By doing in this way, between the 1st connection hole 31 and the 1st polygon pin 451, and between the 2nd connection hole 32 and the 2nd polygon pin 452 are connected by light press-fitting which contacts partially, respectively. Therefore, it becomes easy to maintain the shape by the frictional force between them, and the winding winding work can be easily performed in an annular diameter-expanded state or a belt-like expanded state.

  On the other hand, as shown in FIG. 21, a first connection hole 131 having a polygonal shape in plan view in which the first pin 51 is inscribed, and a second connection hole 132 having a polygonal shape in plan view in which the second pin 52 is inscribed. And may be formed. By doing in this way, between the 1st connecting hole 131 and the 1st pin 51 and between the 2nd connecting hole 132 and the 2nd pin 52 are connected by light press-fitting which touches partially, respectively, It becomes easy to maintain the shape by the frictional force between the two, and the winding work can be easily performed in an annular diameter-expanded state or a belt-shaped expanded state.

  Further, as shown in FIG. 22, an integrally formed U-shaped pin 550 may be used without dividing the connecting member into the first pin, the second pin, and the connecting plate. Further, as shown in FIG. 22, the first locking groove 41 and the second locking groove 42 are formed at positions that do not overlap with the U-shaped pin 550, and the locking holes are formed by contacting the split cores 11A and 11B. A configuration may be adopted in which the locking pin 45 is press-fitted into 43.

  Furthermore, as shown in FIG. 23, when the thickness of the divided core 11 is increased, the divided core 11 may be divided into a plurality of pieces in the axial direction, and the intermediate connecting plate 25 may be provided therebetween. By providing the intermediate connecting plate 25, when the axial length of the split core 11 is long, the first pin 51 and the second pin 52 may be bent or fall down, and the shape may be collapsed when connected in an annular shape. However, bending and falling of the first pin 51 and the second pin 52 can be restricted by sandwiching the intermediate connecting plate 25 therebetween, and the plurality of divided cores 11 can be reliably connected in an annular shape.

  Then, as shown in FIG. 24, after winding the coil 20 around the stator core 10 in which the divided cores 11 are connected in an annular shape, an annular end face plate 70 is provided on the peripheral edge portions of both axial end surfaces of the stator core 10. Also good. By providing the end face plate 70, the annular state of the stator core 10 can be held more firmly.

  DESCRIPTION OF SYMBOLS 1 ... Stator 11 (11A, 11B) ... Split core (split stator core) 13 ... Yoke (yoke part) 15 ... Teeth (tooth part) 21 ... Flat plate steel plate (stator core piece) 23 ... Motor housing (housing) 25 ... Intermediate connection Plate (connecting plate) 31 ... first connecting hole 32 ... second connecting hole 33 ... one end 34 ... other end 35 ... first convex portion 36 ... first concave portion 37 ... second concave portion 38 ... second convex portion 41 ... First locking groove 42 ... Second locking groove 43 ... Locking hole 45 ... Locking pin 50 ... Connecting member 51 ... First pin (first circular pin) 52 ... Second pin (second circular pin) 53 ... Connecting plate (connecting portion) 70 ... end face plate 253 ... hollow portion 254 ... hollow portion 255 ... wedge 451 ... first polygon pin 452 ... second polygon pin

Claims (13)

In the stator formed by connecting a plurality of divided stator cores formed by laminating a plurality of stator core pieces each having a teeth portion and a yoke portion to form an annular shape,
The yoke portion of the split stator core is formed with a first connection hole and a second connection hole in which a connecting member for connecting adjacent split stator cores can be disposed,
In the adjacent split stator core, one end of the connecting member is rotatably inserted into the first connecting hole of one split stator core, and the other end of the connecting member is inserted into the second connecting hole of the other split stator core. It is connected by being inserted freely,
In a state where the adjacent divided stator cores are connected by the connecting member, the yoke portions can be brought into contact with and separated from each other, and the position where the first connecting hole is formed in the divided stator core and the second connecting hole are formed. The stator is different in the radial direction when the yoke portions are in contact with each other. A first convex portion projecting outward in the circumferential direction and a first concave portion recessed inward in the circumferential direction at one end in the circumferential direction of the yoke portion of the split stator core on the side where the first connection hole is formed, Formed,
A second convex portion protruding outward in the circumferential direction and a second concave portion recessed inward in the circumferential direction are provided at the other circumferential end of the split stator core on the side where the second coupling hole is formed. And formed,
The first convex portion and the second concave portion engage with each other, and the first concave portion and the second convex portion engage with each other so that the yoke portions of the adjacent divided stator cores come into contact with each other.
2. The stator according to claim 1, wherein the first connection hole is formed in the first convex portion, and the second connection hole is formed in the second convex portion.   The connection member includes a first polygon pin formed in a polygon inscribed in the circular first connection hole and a second polygon formed in a polygon inscribed in the circular second connection hole. The stator according to claim 1, further comprising: a square pin; and a connecting portion that connects the first polygon pin and the second polygon pin.   The connection member includes a first circular pin formed in a circle inscribed in the first connection hole having a polygonal shape, and a second circular pin formed in a circle inscribed in the second connection hole in a polygonal shape. The stator according to claim 1, further comprising: a connecting portion that connects between the first circular pin and the second circular pin. A first locking groove is formed at one circumferential end of the yoke portion of the split stator core, and a second locking groove is formed at the other circumferential end.
With the adjacent divided stator cores in contact with each other, the first locking groove and the second locking groove are arranged to face each other, thereby forming a locking hole.
The stator according to any one of claims 1 to 4, wherein a locking pin can be inserted into the locking hole. In a state where the adjacent divided stator cores are in contact with each other, the locking hole is provided at a position overlapping the connecting member in a front view,
The stator according to claim 5, wherein the locking pin is configured to be able to pass through the connecting member and be inserted into the locking groove.   The stator according to claim 5 or 6, wherein the locking pin has an urging force capable of pressing the inner peripheral surface of the locking hole.   7. The stator according to claim 1, wherein portions of the connection member inserted into the first connection hole and the second connection hole are formed in a hollow shape.   The stator according to claim 8, wherein a wedge is press-fitted into the hollow portion formed in the hollow shape.   The stator according to any one of claims 1 to 9, wherein an annular end face plate is provided on both axial end faces of the divided stator cores connected in an annular shape.   In a state where the divided stator core is connected and held in an annular shape, the first connection hole and the second connection hole are arranged such that the connection member is disposed on a radially outward extension line of the tooth portion. The stator according to claim 1, wherein the stator is formed.   The stator according to claim 1, wherein the divided stator core is divided into a plurality of parts in the axial direction, and a connecting plate is interposed between the divided stator cores. A motor comprising the stator according to any one of claims 1 to 12,
For the housing that can accommodate the stator,
The motor, wherein the stator is press-fitted and fixed to the inner surface of the housing.

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