JP2021191036A - Annular assembling device for split stator core, and method for manufacturing stator core - Google Patents

Abstract

To provide an annular assembly device for a split stator core that prevents interference at a circumferential end of a back yoke in a step of assembling the last split stator core to a semi-finished core, and a method for manufacturing the stator core.SOLUTION: An assembly chunk 50 of an annular assembly device 90 descends while gripping a last split stator core 300, and the last split stator core 300 can be assembled to a semi-finished core 290. A core expansion jig 60 is fixed to the assembly chunk 50 and inserted into the semi-finished core 290 prior to a core unit of the last split stator core 300 and expands an inner wall of the semi-finished core 290 in an outer diameter direction so that the interference between the last split stator core 300 and the semi-finished core 290 is prevented. A work guide (831 and so on) descends in conjunction with the assembly chunk 50 while securing a circumferential gap into which the back yoke can be fitted, after the assembly chunk 50 descends and a lower end surface 466 of the back yoke in a core unit (31 and so on) of the last split stator core 300 comes into contact with the work guide.SELECTED DRAWING: Figure 11

Description

The present invention relates to an annular assembly device for a split stator core and a method for manufacturing a stator core using the annular assembly device for the split stator core.

Conventionally, as disclosed in, for example, Patent Documents 1 and 2, a method of manufacturing a stator core of a motor by connecting a plurality of divided stator cores in an annular shape is known.

Japanese Unexamined Patent Publication No. 2003-264944 Japanese Unexamined Patent Publication No. 2008-22617

A unit of a split stator core having a back yoke and a tooth around which a coil is wound is referred to as a "core unit". For example, suppose a method of manufacturing a stator core in which 12 core units are connected by assembling three divided stator cores including four core units. Each of the divided stator cores has four core units arranged in every three in the circumferential direction, and the lower part in the axial direction is connected by the insulator ring portion. The insulator ring portion has elasticity that can be expanded and contracted in the radial direction. The three divided stator cores are sequentially assembled coaxially from above so that the insulator ring portions overlap.

Here, a semi-finished product in which the first split stator core and the second split stator core are already assembled is referred to as a "semi-finished core". Further, the third split stator core to be assembled last to the semi-finished core is referred to as a "last split stator core". In the semi-finished core, each core unit is pulled inward by the elasticity of the insulator ring portion, so that when the last split stator core is assembled, the clearance in the circumferential direction into which the back yoke of the core unit is fitted becomes small. If the last split stator core is assembled in this state, the peripheral end of the back yoke interferes with the semi-finished core, causing a problem that the work is damaged.

The present invention was created in view of these points, and an object of the present invention is to circulate the split stator core to prevent interference at the circumferential end of the back yoke in the process of assembling the last split stator core to the semi-finished core. It is an object of the present invention to provide an assembling device and a method for manufacturing a stator core.

In the annular assembly device for the split stator core of the present invention, when n and m are both integers of 2 or more, (n × m) core units (11-14, 21-24, 31-34) are annular. This is a device for coaxially assembling n-body divided stator cores (100, 200, 300) with respect to the stator core (400) connected to the ring.

Each core unit has a back yoke (45) in which the outer ring is divided in the circumferential direction (n × m), and a tooth (48) in which a coil (49) is wound so as to project inward from the back yoke. .. Each divided stator core has an insulator ring portion (18) having elasticity that can be expanded and contracted in the radial direction in a state where m core units are arranged every n in the circumferential direction so that the axial direction of the stator core is in the vertical direction. , 28, 38) connect the lower parts in the axial direction. In this annular assembly device, n-body split stator cores are assembled coaxially from above so that the insulator ring portions overlap each other in order to form an annular structure.

A semi-finished product in which the general split stator cores (100, 200), which are the (n-1) split stator cores of the n bodies, have already been assembled is referred to as a "semi-finished core (290)". The last split stator core to be assembled to the semi-finished core is referred to as the "last split stator core (300)".

The annular assembly device for the split stator core includes {(n-1) × m} positioning arrows (711-714, 721-724), an assembly chuck (50), and a core expansion jig (60). And m work guides (831-834).

The positioning arrows are provided radially outside the semi-finished core in the radial direction, and urges in the radial direction while positioning the circumferential position of the back yoke in the core unit of the general split stator core. The assembly chuck descends while gripping the last split stator core, and the last split stator core can be assembled to the semi-finished core.

The core expansion jig is fixed to the assembly chuck and inserted inside the semi-finished core prior to the core unit of the last split stator core to prevent interference between the last split stator core and the semi-finished core. Increase the distance between the inner walls.

The work guide is provided between the circumferential directions of the positioning arrows corresponding to the position of the core unit of the last split stator core gripped by the assembly chuck. After the assembly chuck is lowered and the lower end surface (466) of the back yoke in the core unit of the last split stator core is in contact with or close to each other, the work guide is assembled while securing a circumferential gap into which the back yoke can be fitted. It descends in conjunction with the chuck.

The method for manufacturing a stator core of the present invention using the above-mentioned annular assembly device for a split stator core includes a preparation stage (S0), an assembly start stage (S1), a core expansion stage (S2), and a lowering stage (S3). ), An assembly completion stage (S4), and an ascending stage (S5). In the preparatory stage, a semi-finished core is manufactured.

At the assembly start stage, the assembly chuck grips the last split stator core above the semi-finished core. At the core expansion stage, the core expansion jig inserted inside the semi-finished core prior to the core unit of the last split stator core as the assembly chuck descends prevents interference between the last split stator core and the semi-finished core. The distance between the inner walls of the semi-finished core is expanded.

In the lowering stage, after the assembly chuck descends and the lower end surface of the back yoke in the core unit of the last split stator core abuts or approaches the work guide, the work is secured while ensuring a circumferential gap into which the back yoke can be fitted. The guide descends in conjunction with the assembly chuck.

At the assembly completion stage, the assembly of the last split stator core and the semi-finished core is completed at the lower limit position of the assembly chuck. In the ascending stage, the assembled chuck that released the last split stator core is ascended.

In the annular assembly device for the split stator core and the method for manufacturing the stator core according to the present invention, the inner wall of the semi-finished core is expanded in the outer diameter direction by a core expanding jig, and then the last split stator core is fitted inside the semi-finished core. Let me. Therefore, even when the core unit is pulled inward by the elasticity of the insulator ring portion, interference with the semi-finished core at the initial stage of assembling the last split stator core is prevented.

Further, after the lower end surface of the back yoke in the core unit of the last split stator core abuts or approaches the work guide, a circumferential gap into which the back yoke can be fitted is secured by the work guide until the lower limit position is reached. Therefore, interference between the last split stator core and the semi-finished core is prevented until the assembly is completed. Therefore, it is possible to suitably prevent the work from being scratched.

(A) plan view and (b) Ib-Ib line sectional view of the first divided stator core. (A) plan view and (b) IIb-IIb line sectional view of the second divided stator core. (A) plan view, (b) IIIb-IIIb line sectional view of the third (last) split stator core. Top view of the annular stator core after assembly. The figure which shows the process of the circular assembly 1 by a comparative example. The figure which shows the process of the cyclic assembly 2 by the comparative example. The figure which shows the process of the cyclic assembly 3 by the comparative example. The flowchart of the manufacturing method of the stator core by one Embodiment. The schematic side view of the annular assembly apparatus in the assembly start stage (S1). Top view of the semi-finished core at the assembly start stage (S1). The schematic side view of the annular assembly apparatus in the core expansion stage (S2). Top view of the semi-finished core in the core expansion stage (S2). The schematic side view of the annular assembly apparatus in the descending stage (S3). The schematic side view of the annular assembly apparatus in the assembly completion stage (S4). The schematic side view of the annular assembly apparatus in the ascending stage (S5). The plan view of the annular stator core in the ascending stage (S5).

(One embodiment)
Hereinafter, an embodiment of an annular assembly device for a split stator core and a method for manufacturing a stator core according to the present invention will be described with reference to the drawings. In the specification, the "circular assembly device for the split stator core" is abbreviated as "annular assembly device". First, referring to FIGS. 1 to 4, the configurations of the first to third divided stator cores 100, 200, 300, which are the parts used in the annular assembly device of the present embodiment, and the annular stator core 400, which is a finished product. Will be explained. The stator core 400 generates a rotating magnetic field by energizing a coil in a three-phase brushless motor to rotate a rotor arranged inside.

As shown in FIG. 4, the stator core 400 of the present embodiment is formed by connecting twelve core units 11-14, 21-24, and 31-34 having a central angle of 30 ° in an annular shape. Each core unit 11-14, 21-24, 31-34 has a back yoke 45 whose outer ring is divided into 12 in the circumferential direction, and a teeth 48 protruding inward from the back yoke 45. A coil 49 is wound around the teeth 48. It should be noted that the winding of the coil 49 is shown schematically, and details such as processing of the end portion and connection of the crossover wire are omitted.

In this stator core 400, three divided stator cores 100, 200, and 300 in which four core units are arranged every three (that is, every 90 °) in the circumferential direction are coaxially assembled. There is no substantial difference in appearance in the plan view of each of the divided stator cores 100, 200, and 300, but for convenience, different types of hatching are marked on the upper end surface 465 of the back yoke 45 to distinguish them. The first split stator core 100 is marked with a coarse pitch dashed line hatch, the second split stator core 200 is marked with a fine pitch broken line hatch, and the third split stator core 300 is marked with satin hatching.

Each (a) of FIGS. 1 to 3 shows a plan view in the direction corresponding to FIG. The X-axis and the Y-axis are reference axes for indicating the relative positions of the divided stator cores 100, 200, and 300. The divided stator cores 100, 200, and 300 are assembled so that the positions of the stator cores are displaced by 30 ° in the circumferential direction. The first split stator core 100 has four core units 11-14, the second split stator core 200 has four core units 21-24, and the third split stator core 300 has four core units 31-34. Have. A core slit 47 is formed on the outer wall of the diameter of the back yoke 45 of each core unit 11-14, 21-24, and 31-34. When the split stator cores 100, 200, and 300 are assembled, the circumferential end portions 468 of the back yoke 45 come into contact with each other to form an annular shape.

Each (b) of FIGS. 1 to 3 shows an axial sectional view. Hereinafter, the Z-axis direction, which is the axial direction of the stator core 400, will be described as the vertical direction. In each of the split stator cores 100, 200, and 300, four core units are integrally formed via resin insulators 150, 250, and 350. The axial lower portions of the insulators 150, 250 and 350 are connected by insulator ring portions 18, 28 and 38 having elasticity that can be expanded and contracted in the radial direction. Further, upper walls 16, 26, 36 are formed on the side opposite to the insulator ring portions 18, 28, 38, and lower walls 17, 27, 37 are formed on the insulator ring portions 18, 28, 38 side.

The three divided stator cores of the first divided stator core 100, the second divided stator core 200, and the third divided stator core 300 are coaxially assembled from above so that the insulator ring portions 18, 28, and 38 overlap in this order, and are annular. Be made. Here, the axial distances L1, L2, and L3 from the lower end surface 466 of the back yoke 45 to the insulator ring portions 18, 28, and 38 of the divided stator cores 100, 200, and 300 are set in the relationship of "L1> L2> L3". Therefore, the insulator ring portions 18, 28, and 38 are overlapped with each other in the Z-axis direction without interfering with each other.

In the present embodiment, two of the three first split stator cores 100 and the second split stator core 200 correspond to the "general split stator core". Further, the third split stator core 300 to be assembled last corresponds to the "last split stator core". The annular assembly device is a device that coaxially assembles three divided stator cores 100, 200, and 300 from above so that the insulator ring portions 18, 28, and 38 overlap each other in order. In particular, in the present embodiment, a semi-finished product in which two general split stator cores 100 and 200 have been assembled is defined as a "semi-finished core", and the process of assembling the last split stator core to the semi-finished core to form a ring is improved. Pay attention to it.

Next, with reference to FIGS. 5 to 7, the cyclic assembly process before the improvement will be described as a comparative example. In the annular assembly device 99 of the comparative example, twelve positioning arrows 711-714, 721-724, and 731-734 are radially provided on the circular support plate 979 with the Z axis as the center. The positioning arrows 711-714, 721-724, and 731-734 are held by the holding block 75 and urged inward by the spring 76. In the illustration, detailed structures such as guides and stoppers for the spring 76 are omitted.

The tips of the positioning arrows 711-714, 721-724, and 731-734 are pointed in a substantially triangular shape, and the tips are fitted into the core slits 47 of the back yoke 45 to fit the core units 11 of the split stator cores 100, 200, and 300. The circumferential positions of -14, 21-24, and 31-34 are positioned.

In the step of the annular assembly 1 shown in FIG. 5, the first split stator core 100 gripped by the assembly chuck (see the configuration of the assembly chuck 50 of the present embodiment described later) is set on the support plate 979. In the step of the annular assembly 2 shown in FIG. 6, the second divided stator core 200 held by the assembly chuck at a distance of 30 ° from the first divided stator core 100 is assembled to the first divided stator core 100, and the semi-finished core is formed. 290 is manufactured.

At this time, as shown by the broken line arrow EL, the core units 11-14 and 21-24 are pulled inward by the elasticity of the insulator ring portions 18 and 28. Therefore, the circumferential width W3 of the gap into which the back yoke 45 is fitted in the core unit 31-34 of the third split stator core 300 becomes smaller than the original width.

Then, when the third split stator core 300 is assembled to the semi-finished core 290 in the step of the annular assembly 3 shown in FIG. 7, the circumferential end portion of the back yoke 45 in the core units 31-34 interferes with the semi-finished core 290. However, there is a problem that the work is scratched (shown by the crash mark). Therefore, in the annular assembly device and the method for manufacturing the stator core of the present embodiment, it is possible to prevent interference at the circumferential end of the back yoke 45 in the step of assembling the third divided stator core 300 to the semi-finished core 290. The purpose.

Next, a method of manufacturing the stator core according to the present embodiment will be described with reference to FIGS. 8 to 16. In the flowchart of FIG. 8, the symbol “S” means a step. In the preparation stage of S0, the semi-finished core 290 is manufactured. At this stage, there is no big difference from the process of the cyclic assembly 2 of the comparative example shown in FIG. After that, the assembly start stage of S1, the core expansion stage of S2, the lowering stage of S3, the assembly completion stage of S4, and the ascending stage of S5 are carried out in order. Hereinafter, the details of S1 to S5 will be described with reference to FIGS. 9 to 16.

The schematic side views of FIGS. 9, 11, 13, 14, and 15 are for the purpose of explaining the operation of the annular assembly device 90, and briefly show the support structure and the operation mechanism. Each figure does not accurately reflect the actual dimensional ratio or the visible shape in the viewing direction, and includes a cross-sectional view in part. The vertical direction of the schematic side view corresponds to the Z direction, which is the axial direction of the annular stator core 400. The upper side of the schematic side view will be described as "upper" and the lower side will be described as "lower". The plan view of FIGS. 10 and 12 shows the semi-finished core 290 on the support plate 97, and the plan view of FIG. 16 shows the annular stator core 400 on the support plate 97.

Before explaining each step, first, a schematic configuration of the annular assembly device 90 will be described. The annular assembly device 90 includes a fixed top plate 95, a support plate 97, a base 98, eight positioning arrows 711-714, 721-724, an assembly chuck 50, a core expanding jig 60, and 4 The work guides 831-834 and the like are provided.

On the support plate 97, a holding block 75 for holding eight positioning arrows 711-714 and 721-724 radially provided outside the semi-finished core 290 in the radial direction is placed. Each holding block 75 is provided with a spring 76 that urges the positioning arrows 711-714 and 721-724 in the inward direction. By fitting the tips of the positioning arrows 711-714 and 721-724 into the core slit 47 of the back yoke 45 in each core unit 11-14 and 21-24, the circumferential position of the semi-finished core 290 is positioned.

The movable plate 55 of the assembly chuck 50 moves up and down with respect to the top plate 95 by a cylinder provided on the top plate 95. Four grips 56 and a core expanding jig 60 are attached to the lower surface of the movable plate 55. The gripping portion 56 can chuck each core unit 31-34 of the third split stator core 300, which is a work, by the gripping force in the inward direction, and releases the gripping force in the out-diameter direction. Can be unchucked with. The detailed illustration of the mechanism of the grip portion 56 will be omitted. The assembly chuck 50 descends while gripping the third split stator core 300, and the third split stator core 300 can be assembled to the semi-finished core 290.

The core expanding jig 60 is fixed to the central portion of the assembly chuck 50. The outer wall 66 at the lower end of the core expanding jig 60 is inclined so that the distance from the axis of the assembly chuck 50 gradually increases from the bottom to the top. The inclination of the outer wall 66 is exaggerated. The core expansion jig 60 is inserted inside the semi-finished core 290 prior to the core unit 31-34 of the third split stator core 300 so as to prevent interference between the third split stator core 300 and the semi-finished core 290. Increase the distance between the inner walls of the completed core 290.

The work guide 831-834 is provided between the positioning arrows in the circumferential direction corresponding to the position of the core unit 31-34 of the third split stator core 300 gripped by the assembly chuck 50 in the circumferential direction. Further, the work guide 831-834 is provided at the position of the back yoke 45 of the core unit 31-34 in the radial direction. The work guide 831-834 is constantly urged upward by, for example, a spring 86 supported by the base 98.

The work guide 831-834 has a circumferential gap into which the back yoke 45 can be fitted after the assembly chuck 50 is lowered and the lower end surface 466 of the back yoke 45 in the core unit 31-34 of the third split stator core 300 comes into contact with the work guide 831-834. It descends in conjunction with the assembly chuck 50 while ensuring the above. The above is a description of the schematic configuration of the annular assembly device 90.

[S1 assembly start stage]
As shown in FIG. 9, in the assembly start stage S1, the four grip portions 56 of the assembly chuck 50 grip the third split stator core 300 above the semi-finished core 290 positioned on the support plate 97. After that, the assembly chuck 50 descends while gripping the third split stator core 300. The height of the upper end of the work guide 831-834 coincides with the position of the upper end surface 465 of the back yoke 45 in the core units 11-14 and 21-24 of the first and second split stator cores 100 and 200 of the semi-finished core 290. ing.

As shown in FIG. 10, the core units 11-14 and 21-24 of the first and second split stator cores 100 and 200 of the semi-finished core 290 are positioned in the circumferential direction by the positioning arrows 711-714 and 721-724. ing. Further, work guides 831, 832, 833, and 834 are arranged between the core units 21 and 12, between the core units 22 and 13, between the core units 23 and 14, and between the core units 24 and 11, respectively, and the third The minimum width W3 of the gap into which the split stator core 300 is assembled is secured.

[S2 core expansion stage]
As shown in FIG. 11, in the core expansion step S2, as the assembly chuck 50 descends (arrow DN), the lower end portion of the core expansion jig 60 precedes the core unit 31-34 of the third split stator core 300. It is inserted inside the semi-finished core 290. By inserting the inclined outer wall 66 of the core expanding jig 60, as shown in FIG. 12, the core units 11-14 and 21-24 of the first and second divided stator cores 100 and 200 of the semi-finished core 290 A force Fout that pushes the inner wall in the outer diameter direction acts. Therefore, the distance d between the inner walls of the semi-finished core 290 is widened.

[S3 descending stage]
As shown in FIG. 13, in the descending step S3, the assembly chuck 50 descends (arrow DN), and the lower end surface 466 of the back yoke 45 in the core unit 31-34 of the third split stator core 300 becomes the work guide 831-834. Contact. After that, the work guide 831-834 is lowered in conjunction with the assembly chuck 50 by being pushed down to the lower end surface 466 of the back yoke 45. During that time, the posture of the semi-finished core 290 is kept stable, and a circumferential gap into which the back yoke 45 in the core unit 31-34 of the third split stator core 300 can be fitted is secured.

[S4 assembly completion stage]
In this way, the core units 31-34 of the third split stator core 300 are gradually replaced and arranged in the space occupied by the work guide 831-834. Then, as shown in FIG. 14, in the assembly completion stage S4, the assembly of the third split stator core 300 and the semi-finished core 290 is completed at the lower limit position of the assembly chuck 50.

At this time, the work guide 831-834 is locked by the lock claw 87 at the lower limit position, and the rise due to the urging force of the spring 86 is restricted. The spring 86 and the lock claw 87 are shown schematically, and the specific structure may be appropriately designed. Further, the grip portion 56 of the assembled chuck 50 unchucks (arrow UC) to release the third split stator core 300.

[S5 rising stage]
As shown in FIG. 15, in the ascending step S5, the assembled chuck 300 that has released the third split stator core 300 is ascended (arrow UP). As shown in FIG. 16, when the core expanding jig 60 is pulled out, the core units 11-14 and 21-24 are pulled inward by the elastic EL of the insulator ring portions 18 and 28, and the shape of the annular stator core 400 is automatically formed. Is formed in.

This completes the manufacturing process by the annular assembly device 90 for the split stator core. After that, the annular stator core 400 is transported to the next step and housed in the motor housing. At this time, since both the inner peripheral side and the outer peripheral side of the stator core 400 are restricted by the housing, the connected state is maintained without loosening.

(Effect of this embodiment)
(1) In the method for manufacturing the annular assembly device 90 for the split stator core and the stator core 400 according to the present embodiment, the inner wall of the semi-finished core 290 is expanded in the outer diameter direction by the core expansion jig 60, and then the third division is performed. The stator core 300 is fitted inside the semi-finished core 290. Therefore, even when the core units 11-14 and 21-24 are pulled inward by the elasticity of the insulator ring portions 18 and 28, interference with the semi-finished core 290 at the initial stage of assembling the third split stator core 300 is prevented. To.

Supplementally, there is a possibility that the circumferential ends of the core units 11-14 and 21-24 may interfere with each other even in the step of assembling the second split stator core 200 to the first split stator core 100 in the preparation stage of the semi-finished core 290. At this time, by using the core expanding jig 60 in the same manner to increase the distance between the inner walls of the first divided stator core 100, it is possible to prevent interference with the second divided stator core 200.

Further, after the lower end surface 466 of the back yoke 45 in the core unit 31-34 of the third split stator core 300 comes into contact with the work guide, the work guide has a circumferential gap into which the back yoke 45 can be fitted until the lower limit position is reached. Secured by 831-834. Therefore, interference between the third split stator core 300 and the semi-finished core 290 is prevented until the assembly is completed. Therefore, it is possible to suitably prevent the work from being scratched.

(2) The outer wall 66 of the core expanding jig 60 of the present embodiment is inclined so that the distance from the axis of the assembled chuck 50 gradually increases from the bottom to the top, and the core expanding jig 60 is assembled. As the attached chuck 50 descends, the inner wall of the semi-finished core 290 is expanded in the out-of-diameter direction. By doing so, it is not necessary to provide a mechanism or the like for sliding the jig in the out-of-diameter direction, so that the configuration can be compact and can be operated quickly.

(3) The work guide 831-834 of the present embodiment is always urged upward by the spring 86, and after the lower end surface 466 of the back yoke 45 in the core unit 31-34 of the third split stator core 300 comes into contact with the work guide 831-834. , Pushed down to the back yoke 45. By doing so, it is not necessary to separately provide a lowering operation mechanism dedicated to the work guide, so that a simple configuration can be achieved.

(Other embodiments)
(A) The stator core 400 of the above embodiment is formed by connecting twelve core units 11-14, 21-24, 31-34 having a back yoke 45 whose outer ring is divided into 12 in the circumferential direction in an annular shape. The four core units are annularized by assembling three divided stator cores arranged in every three in the circumferential direction in order. Here, for generalization, the number of split stator cores is n, and the number of core units per split stator core is m. Both n and m are integers of 2 or more. The above embodiment is an example of n = 3 and m = 4, but the present invention is not limited to this example and is generally applicable to a stator core defined by n and m.

That is, in the stator core to which the present invention is applied, (n × m) core units having a back yoke whose outer ring is divided in the circumferential direction (n × m) are connected in an annular shape, and m cores are connected. N-body split stator cores in which units are arranged every n in the circumferential direction are assembled in order to form an annular shape. Here, among the n bodies, a semi-finished product in which the (n-1) body "general divided stator core" from the first divided stator core to the (n-1) divided stator core is already assembled is a "semi-finished core". Further, one nth split stator core finally assembled to the semi-finished core is the "last split stator core".

(B) The core expanding jig 60 has a structure in which the outer wall 66 is inclined as in the above embodiment, and for example, each jig divided into four in the circumferential direction slides in the outer diameter direction after descending. It may be a structure. By offsetting each jig in the out-of-diameter direction, the inner wall of each core unit 11-14 and 21-24 of the semi-finished core 290 can be uniformly expanded in the axial direction.

(C) The work guide 831-834 is at a position where the lower end surface 466 of the back yoke 45 in each core unit 31-34 of the third split stator core 300 is in contact with or close to each other, instead of being constantly urged upward by the spring 86. Therefore, the cylinder supporting the work guide 831-834 may descend at the same speed in conjunction with the assembly chuck 50. For example, by lowering the work guide 831-834 first at a position just before the lower end surface 466 comes into contact with the work guide 831-834, it is possible to avoid scratching the lower end surface 466 of the back yoke 45 due to contact with the work guide 831-834.

As described above, the present invention is not limited to the above embodiment, and can be implemented in various embodiments without departing from the spirit of the present invention.

100: 1st split stator core (general split stator core),
200: 2nd split stator core (general split stator core), 290: semi-finished core,
300: Third split stator core (last split stator core),
400: (annular) stator core,
11-14, 21-24, 31-34: Core unit 18, 28, 38: Insulator ring 45: Back yoke, 466: Lower end surface, 48: Teeth, 49: Coil,
50: Assembly chuck, 60: Core expansion jig,
711-714, 721-724: Positioning Arrow, 831-834: Work Guide,
90: An annular assembling device (of the split stator core).

Claims (4)

Assuming that both n and m are integers of 2 or more, the back yoke (45) whose outer ring is divided in the circumferential direction (n × m) and the coil (49) protruding inward from the back yoke are wound. For a stator core (400) in which (n × m) core units (11-14, 21-24, 31-34) having turned teeth (48) are connected in an annular shape.
Insulator ring portions (18, 28, A device in which n-body divided stator cores (100, 200, 300) to which the lower portions in the axial direction are connected by 38) are assembled coaxially from above so as to overlap the insulator ring portions in order to form an annular shape. ,
Of the n bodies, the semi-finished product in which the general split stator cores (100, 200), which are the (n-1) bodies of the split stator cores, have been assembled is referred to as a semi-finished core (290), and is finally assembled to the semi-finished core. Assuming that one of the split stator cores is the last split stator core (300),
It is provided radially outside the semi-finished core in the radial direction, and is urged in the radial direction while positioning the circumferential position of the back yoke in the core unit of the general split stator core {(n-1) × m}. With the individual positioning arrows (711-714, 721-724),
An assembly chuck (50) capable of descending while gripping the last split stator core and assembling the last split stator core to the semi-finished core.
The semi-finished core is fixed to the assembled chuck and inserted inside the semi-finished core prior to the core unit of the last split stator core so as to prevent interference between the last split stator core and the semi-finished core. A core expansion jig (60) that expands the distance between the inner walls of the
The core of the last split stator core is provided between the circumferential directions of the positioning arrows corresponding to the position of the core unit of the last split stator core gripped by the assembly chuck, and the assembly chuck is lowered to lower the core of the last split stator core. After the lower end surface (466) of the back yoke in the unit comes into contact with or approaches, m work guides (831) that descend in conjunction with the assembly chuck while securing a circumferential gap into which the back yoke can be fitted. -834) and
An annular assembly device for a split stator core comprising. The outer wall (66) at the lower end of the core expanding jig is inclined so that the distance from the axis of the assembly chuck gradually increases from the bottom to the top, and the core expanding jig is the assembly. The annular assembly device for a split stator core according to claim 1, wherein the inner wall of the semi-finished core is expanded in the out-of-diameter direction as the chuck is lowered. 2. 2. The annular assembly device for the split stator core according to 2. The method for manufacturing the stator core using the annular assembly device for the split stator core according to any one of claims 1 to 3.
In the preparatory stage (S0) when the semi-finished core is manufactured,
The assembly start stage (S1) in which the assembly chuck grips the last split stator core above the semi-finished core, and
The core expanding jig inserted inside the semi-finished core prior to the core unit of the last split stator core as the assembly chuck descends causes interference between the last split stator core and the semi-finished core. The core expansion stage (S2) in which the distance between the inner walls of the semi-finished core is expanded to prevent it,
After the assembling chuck descends and the lower end surface of the back yoke in the core unit of the last split stator core abuts or approaches the work guide, while securing a circumferential gap into which the back yoke can be fitted, while ensuring a circumferential gap into which the back yoke can be fitted. In the descending step (S3) in which the work guide descends in conjunction with the assembled chuck,
At the assembly completion stage (S4) where the assembly of the last split stator core and the semi-finished core is completed at the lower limit position of the assembly chuck,
In the ascending step (S5) in which the assembled chuck that has released the last split stator core rises,
A method for manufacturing a stator core including.

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