JP4369709B2 - Coil shaping device - Google Patents

Description

  The present invention relates to a coil shaping device that inserts a cylindrical former along the inner side surface of a stator core, and shapes a coil end protruding from an end surface among coils attached to the stator core by a press unit that is linked to the former. .

  When a coil is mounted on a stator core of a rotating electrical machine, a coil end that is a folded end portion of the coil protrudes from the end surface of the stator core by a predetermined length. Such a coil end is preferably shaped into a compact shape so as not to hinder the assembly with the casing or rotor, and an apparatus for automating the work of shaping the coil end has been proposed (for example, Patent Document 1).

JP-A-6-184359

  By the way, the lead part which is the end part of the conducting wire forming the coil is drawn out to the outer diameter side of the stator core because it is connected to the power source and the load, but if the coil end is carelessly shaped in this state, the coil shaping device The lead part may be damaged by the pressing part.

  The present invention has been made in consideration of such problems, and an object of the present invention is to provide a coil shaping device capable of reliably protecting a lead portion when shaping a coil end.

  A coil shaping device according to the present invention protrudes from an end surface of a stator core among coils mounted on the stator core by a columnar former inserted along the inner surface of the stator core and a press portion interlocked with the former. A coil shaping device for shaping a coil end that includes a lead support portion that is provided in the vicinity of the stator core, is passively movable in parallel with the axial direction of the former, and communicates in a radial direction as viewed from the former. When holding the holding end and shaping the coil end, the lead portion of the coil is inserted into the lead support portion of the holding portion, and the holding portion is pressed by a holding portion pressing portion interlocked with the former. The holding portion pressing portion moves integrally with the holding portion pressing portion.

  In this way, by inserting the lead portion into the lead support portion of the holding portion, when shaping the coil end, the lead portion can be reliably protected by the holding portion and the lead portions are bundled in an orderly manner. It maintains its shape and is easy to handle in later processes. Since the holding portion moves integrally with the holding portion pressing portion, an excessive external force is not applied to the lead portion inserted into the lead support portion.

  In this case, the lead support part is a groove whose surface facing the holding part pressing part is open, and the groove is preferably set so that the depth is wider at the back than the surface. . By setting in this way, the cross section of the groove, which is the lead support portion, is substantially C-shaped, and the lead portion is easy to insert into the groove and is difficult to protrude.

  A base portion provided in the vicinity of the stator core; and a shaft portion that is inserted into a hole provided in the base portion so as to be able to advance and retract. The holding portion is provided at an end portion of the shaft portion. Then, the holding portion is reliably supported by the shaft portion and can be stably operated.

  According to the coil shaping device according to the present invention, the lead portion can be reliably protected by the holding portion when shaping the coil end. Further, since the holding portion is passively movable, an excessive force is not applied to the lead portion when the lead portion is inserted into the lead support portion or when the coil end is shaped.

  Furthermore, the lead part after shaping the coil end maintains an orderly bundled shape by the lead support part of the holding part, and is easy to handle in the subsequent process.

  Hereinafter, an embodiment of the coil shaping device according to the present invention will be described with reference to FIGS.

  As shown in FIG. 1, a coil shaping device 10 according to the present embodiment is a device that shapes a coil end 14 protruding from an end surface of a stator core 12 of a rotating electrical machine, and is inserted along the inner surface of the stator core 12. A cylindrical former 16 that is formed, an upper surface pressing portion 18 that is integrally formed with the former 16 and presses the coil end 14 from above, and a plurality of side surfaces that press the coil end 14 from the side in conjunction with the former 16. It has a press part 20, a stator core support part 22 that supports the stator core 12, and a lead protection jig 24 attached to the stator core 12. On the side surface of the former 16, a holding portion pressing portion 25 protruding in the radial direction is provided.

  After the stator core 12 is attached to the coil shaping device 10, the former 16 is lowered by a predetermined button operation. At this time, the former 16 is inserted along the inner surface of the stator core 12 to support the inner diameter side of the coil end 14. Moreover, the upper surface press part 18 and the side surface press part 20 press the upper surface and outer diameter side of the coil end 14, and the coil end 14 is compression-shaped by the predetermined shape.

  The stator core 12 also has a coil end 14a protruding downward, and the coil end 14a is shaped by a press 20a provided below.

  As shown in FIG. 2, the lead protection jig 24 includes a U-shaped base portion 30 that is attached to the side surface of the stator core 12, and a hole that is provided in the base portion 30 and communicates in parallel with the axial direction of the former 16. The shaft portion 34 is inserted into the shaft portion 32 so as to be able to advance and retreat, and the holding portion 38 is provided at the upper end portion of the shaft portion 34 and includes a groove (lead support portion) 36 communicating in the radial direction as viewed from the stator core 12. . A grip 40 is provided at the end of the side surface of the base portion 30, and a stay 41 that supports the side surface of the stator core 12 is provided on the lower surface.

  The groove 36 may be, for example, a hole communicating in the radial direction. The holding portion 38 may be configured to be detachable from the shaft portion 34.

  The base portion 30 is attached to the side surface of the stator core 12 by a fastening portion 42, and is fixed so that the height of the upper surface of the base portion 30 and the upper surface of the stator core 12 are substantially coincident. For example, the fastening portion 42 may be attracted to the side surface of the stator core 12 using a magnet.

  The shaft portion 34 is inserted into the hole 32, is maintained in height by a light frictional force, and the operator can freely set the advance / retreat amount in the initial state by hand. Further, a rotation stop groove 44 extending in the axial direction is provided on the side surface of the shaft portion 34, and the rotation stop groove 44 engages with a protrusion provided on the inner wall of the hole 32 to rotate the shaft portion 34. Is prevented.

  The lead protection jig 24 is made of, for example, a smooth synthetic resin having a surface such as nylon, and a predetermined support component is embedded in a portion where a bolt or the like is screwed.

  As shown in FIG. 3, the holding portion 38 is a substantially rectangular parallelepiped, and the lower surface is fixed to the upper end portion of the shaft portion 34. The groove 36 is provided on the upper surface of the holding portion 38, and the width D of the groove 36 is set to be wider than the width d of the upper surface 38 a of the holding portion 38. That is, the cross section of the groove 36 is substantially C-shaped.

  Regarding the width in the circumferential direction viewed from the stator core 12, the width of the holding portion 38 is set to be smaller than the arrangement interval of the side press portions 20.

  In the holding portion 38, each corner in the direction close to the stator core 12 is rounded, so that the lead portion 46 (see FIG. 1) is not damaged, and the lead portion 46 is smooth against the groove 36. Can be introduced. Further, U-shaped recesses 48 that are recessed from the end portion toward the outer diameter direction are provided on the left and right side surfaces at the end portion in the direction close to the stator core 12, and the lead portion 46 is also provided from the right direction or the left direction. The groove 36 can be smoothly introduced.

  Next, a method of shaping the coil end 14 of the stator core 12 using the coil shaping device 10 configured as described above will be described.

  First, the lead protection jig 24 is attached to the stator core 12 by operating the fastening portion 42, and the advancement / retraction amount of the shaft portion 34 with respect to the hole 32 so that the height of the holding portion 38 substantially matches the height of the lead portion 46. Adjust. This adjustment can be performed by the operator directly operating the shaft portion 34 by hand, and the shaft portion 34 is maintained in a certain state with a certain amount of advancement and retraction by a light frictional force.

  Next, the lead part 46 is inserted into the groove 36 of the holding part 38. Since the groove 36 has an opening on the upper surface 38a, the lead portion 46 can be easily inserted into the groove 36 regardless of its length. By inserting the lead portion 46 into the groove 36 in this manner, the lead portion 46 can be pulled out to the outer diameter side of the stator core 12 while being bundled. In particular, since the holding portion 38 is adjusted in advance and retreat in accordance with the height of the lead portion 46, the lead portion 46 is not deformed or excessive force is applied, and the lead portion 46 is removed in a natural state. It can be pulled out to the radial side.

  Further, since the cross section of the groove 36 is substantially C-shaped, the lead portion 46 once inserted into the groove 36 does not inadvertently protrude outside.

  Next, the stator core 12 to which the lead protection jig 24 is attached is attached and fixed to the stator core support portion 22 by a predetermined procedure.

  Further, the former 16 is lowered by a predetermined button operation to automatically shape the coil end 14. At this time, first, the former 16 is inserted along the inner surface of the stator core 12, and the coil end 14 is supported from the inner surface by the side surface of the former 16.

  When the former 16 is further lowered, the lower surface of the upper surface pressing portion 18 pushes down the upper surface of the coil end 14, and the upper surface 38 a of the holding portion 38 is passively pressed down by the holding portion pressing portion 25. At this time, since the former 16 and the upper surface pressing portion 18 are driven with a large force by an actuator such as a hydraulic cylinder, for example, the shaft portion 34 in which the advance / retreat amount is held can be easily pushed down by a light frictional force. it can.

  The holding portion 38 is reliably supported by the shaft portion 34 and can operate stably. Although some force may be applied to the base portion 30, the base portion 30 does not bend because it is supported by the stay 41.

  The upper surface of the coil end 14 and the holding portion 38 are pushed down substantially simultaneously, and the coil end 14 and the lead portion 46 that is the end thereof are lowered integrally with almost no change in relative positional relationship. Therefore, an excessive force is not applied to the lead portion 46.

  Further, the lead portion 46 is inserted into the groove 36, and the upper surface of the groove 36 is covered with the holding portion pressing portion 25, so that the lead portion 46 does not protrude outward and can be held in a bundled state. Therefore, the lead part 46 is protected by the holding part 38, and a plurality of conductive wires (for example, copper wires having an enamel insulating coating) are scattered or bitten by the upper surface pressing part 18 and the side surface pressing part 20. It will not be damaged or damaged.

  Furthermore, when the coil end 14 is pushed down, the lead part 46 is pushed out somewhat toward the outer diameter direction, but the holding part 38 is made of a synthetic resin with a smooth surface and rounds the corners. Therefore, the lead portion 46 can smoothly extend in the outer diameter direction in the groove 36.

  Furthermore, since the rotation stop groove 44 is provided in the shaft portion 34, the direction of the holding portion 38 is kept constant, and the lead portion 46 is not bent.

  Next, as shown in FIG. 4, after the former 16 is lowered to a predetermined position, the side press portion 20 moves slightly toward the inner diameter direction, and the coil end 14 is pressed from the side to be shaped. At this time, since the width of the holding portion 38 is set to be smaller than the arrangement interval of the side press portions 20, the holding portion 38 is not crushed by the side press portions 20.

  Although detailed description is omitted, the coil end 14a below the stator core 12 is also shaped by the press 20a.

  Thereafter, after the side press part 20 moves slightly in the outer diameter direction, the former 16 returns upward. At this time, the holding portion 38 is held at the position where it is lowered. In this state, the coil end 14 is compressed and shaped into a predetermined shape, and the lead protection jig 24 may be removed from the stator core 12 after the stator core 12 is removed from the stator core support 22.

  In this way, the stator core 12 in which the coil end 14 is compressed and shaped into a predetermined shape by the coil shaping device 10 has the lead portions 46 bundled in an orderly manner, and the lead portion 46 is handled in the process of assembling the stator core 12 to the casing or rotor. Cheap.

  Further, when the coil end 14 is shaped, since the lead part 46 is protected by the holding part 38, damage such as disconnection can be prevented, and the yield in this step can be improved.

  The lead protection jig 24 may not necessarily be attached to the stator core 12 as long as the lead protection jig 24 is provided in the vicinity of the stator core 12. Further, the holding portion 38 is not necessarily supported by the shaft portion 34, and may be supported movably by an elastic body having a small spring constant or an appropriate link mechanism, for example.

  The coil shaping device according to the present invention is not limited to the above-described embodiments, and various configurations can be adopted without departing from the gist of the present invention.

It is a perspective view of the coil shaping apparatus and stator core which concern on this Embodiment. It is a perspective view of a lead wire protection jig. It is an expansion perspective view of a holding part. It is a perspective view of a coil shaping device and a stator core in a state where a former is lowered when shaping a coil end.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Coil shaping device 12 ... Stator core 14, 14a ... Coil end 16 ... Former 18 ... Upper surface press part 20 ... Side surface press part 22 ... Stator core support part 24 ... Lead protection jig 30 ... Base part 32 ... Hole 34 ... Shaft part 36 ... groove 38 ... holding portion 38a ... upper surface 42 ... fastening portion 44 ... around stop groove 46 ... lead portion

Claims (3)

A coil shaping device for shaping a coil end protruding from an end surface of the stator core among coils mounted on the stator core by a columnar former inserted along the inner side surface of the stator core and a press portion interlocked with the former. Because
A holding portion provided in the vicinity of the stator core, passively movable in parallel with the axial direction of the former, and having a lead support portion communicating in the radial direction as viewed from the former;
When shaping the coil end, the lead portion of the coil is inserted into the lead support portion of the holding portion, and the holding portion is pressed by a holding portion pressing portion interlocked with the former, and the holding portion pressing The coil shaping apparatus characterized by moving integrally with the part. The coil shaping device according to claim 1,
The coil support device, wherein the lead support part is a groove having an open surface facing the holding part pressing part, and the groove is wider at the back than the surface. In the coil shaping device according to claim 1 or 2,
Further, a base portion provided in the vicinity of the stator core,
A shaft portion inserted through the hole provided in the base portion so as to be able to advance and retract;
Have
The coil shaping device, wherein the holding portion is provided at an end portion of the shaft portion.

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