JP6196720B1 - Conductor segment end forming apparatus and stator manufacturing method - Google Patents

Abstract

An object of the present invention is to bend the ends of a plurality of conductor segments with high workability by a relatively simple mechanism. Extending end portions of conductor segments arranged in a radial direction are alternately held by a first group of cylindrical members and a second group of cylindrical members, and formed on opposing circumferential surfaces of the first group of cylindrical members. 1st rotation which penetrates the narrow slit 231 made and the wide slit 232 formed in the circumferential surface which the 2nd group cylindrical member opposes, respectively, and rotates only the 1st group cylindrical member by rotation operation | movement. The lever 217, the narrow slit 231 formed on the opposing circumferential surface of the second group of cylindrical members, and the wide slit 232 formed on the opposing circumferential surface of the first group of cylindrical members are respectively penetrated and rotated. The second rotating lever 218 that rotates only the second group of cylindrical members by the moving operation is rotated in the opposite direction, and the first group of cylindrical members and the second group of cylindrical members are rotated in the opposite directions. . [Selection] Figure 5

Description

  The present invention provides an end portion of a plurality of conductor segments that are inserted in a predetermined arrangement into a predetermined slot from one end surface side of the stator core and set so that the end portions inserted from the other end surface side of the stator core are arranged concentrically. The present invention relates to a conductor segment end forming apparatus and a method of manufacturing a stator using the same, in which the ends of the conductor segments to be conducted can be brought close to each other and joined together.

  2. Description of the Related Art Conventionally, a segment sequential joining type stator coil formed by sequentially joining a number of segment conductors inserted into slots of a stator core is known. In this segment sequential joining type stator coil, a pair of leg portions of a segment are individually inserted into a pair of slots separated from each other by a substantially magnetic pole pitch of the stator core, and both ends projecting out are bent in the circumferential direction. It is formed by joining the tips sequentially.

  As such a conductor segment end forming device, in Patent Document 1 below, a cylindrical twisting jig arranged concentrically is used, and an insertion part for holding the end of the segment on the end face of each twisting jig And several other twisting jigs arranged between the twisting jigs by rotating several twisting jigs arranged in the radial direction at a first angle in the clockwise direction. An apparatus for bending a conductor segment end by rotating the tool counterclockwise at a second angle so that the sum of the first angle and the second angle is the required slot pitch is disclosed. ing.

Japanese Patent No. 3778658

  However, the apparatus described in Patent Document 1 has a structure in which cylindrical twisting jigs arranged concentrically are rotated by independent driving means, so that the apparatus becomes complicated and the manufacturing equipment is There is a problem that the cost is increased and the manufacturing apparatus is increased in size.

  Accordingly, an object of the present invention is to provide a conductor segment end forming apparatus capable of bending and forming the ends of a plurality of conductor segments with a relatively simple mechanism with good workability, and a stator manufacturing method using the same. There is.

In order to achieve the above object, the conductor segment end forming apparatus of the present invention is inserted into a predetermined slot in a predetermined arrangement from one end surface side of the stator core, and an end portion inserted from the other end surface side of the stator core has In the end molding device for a plurality of conductor segments set to be concentrically arranged,
A holding groove for holding the end of the conductor segment is formed on the lower end surface, and a narrow slit formed on the opposing circumferential surface, and a wide slit formed on the opposing circumferential surface intersecting the narrow slit. A plurality of first group of cylindrical members having a plurality of conductor segments set in a concentric circle and inserted into the holding groove and held at every other end in the radial direction; ,
A holding groove for holding the end of the conductor segment is formed on the lower end surface, and a narrow slit formed on the opposing circumferential surface, and a wide slit formed on the opposing circumferential surface intersecting the narrow slit. Among the end portions of the plurality of conductor segments that are concentrically arranged and are not held by the first group of cylindrical members, the ones arranged in the radial direction are inserted into the holding groove. Holding a plurality of second group cylindrical members;
The narrow slits formed on the opposing circumferential surfaces of the first group of cylindrical members and the wide slits formed on the opposing circumferential surfaces of the second group of cylindrical members are respectively penetrated, and are rotated by the rotation operation. A first rotating lever for rotating only the first group of cylindrical members;
The narrow slits formed on the opposing circumferential surfaces of the second group of cylindrical members and the wide slits formed on the opposing circumferential surfaces of the first group of cylindrical members are respectively penetrated, and are rotated by the rotation operation. A second rotating lever for rotating only the second group of cylindrical members;
A driving device that rotates the first rotation lever and the second rotation lever in opposite directions to rotate the first group of cylindrical members and the second group of cylindrical members in opposite directions; It is characterized by that.

  According to the conductor segment end portion forming apparatus of the present invention, every other end portion of the plurality of conductor segments inserted in the other end face side of the stator core and set so as to be arranged concentrically is arranged in the radial direction. The aligned members are inserted and held in the holding grooves of the first group of cylindrical members, and the second group of cylindrical members that are not held by the first group of cylindrical members and are arranged in the radial direction. A narrow slit formed on the opposing circumferential surface of the first group of cylindrical members, and a wide slit formed on the opposing circumferential surface of the second group of cylindrical members, respectively. A first rotating lever that passes through and rotates only the first group of cylindrical members by a pivoting operation, a narrow slit formed on the opposing circumferential surfaces of the second group of cylindrical members, and the first group of cylindrical members Each through a wide slit formed on the opposing circumferential surface, By rotating the second rotating lever that rotates only the second group of cylindrical members by the moving operation in the opposite directions by the driving device, the first group of cylindrical members and the second group of cylindrical members are respectively in opposite directions. The end of the conductor segment held by the first group of cylindrical members is bent in one circumferential direction, and the end of the conductor segment held by the second group of cylindrical members is bent in the circumferential direction. Bend in the other direction opposite to the above, and bring the end bent in one direction of the conductor segment close to the end bent in the other direction of the other conductor segment that is to be conducted. Can be possible.

  In the conductor segment end forming apparatus according to the present invention, the driving device is arranged in parallel with the first group of cylindrical members and the second group of cylindrical members in between, and the direction of the thread groove is an axial intermediate portion. A pair of ball screws that are in opposite directions with respect to each other, a first moving block that is screwed to an end portion that is positioned diagonally of the pair of ball screws, and the pair of ball screws that are different from the above The first moving block and the second moving block are moved closer to each other or away from each other by simultaneously rotating the second moving block and the pair of ball screws respectively screwed to the end portions located in the diagonal direction. An interlocking mechanism for moving in the direction, wherein the first rotation lever is pivotally supported by the first movement block, and the second rotation lever is pivotally supported by the second movement block. It is preferable.

  According to the above aspect, the pair of ball screws are simultaneously rotated by one driving source or driving operation via the interlocking mechanism, and the first moving block and the second moving block are moved in a direction toward or away from each other. Thus, the first lever and the second lever can be simultaneously rotated in opposite directions.

  In the conductor segment end forming apparatus according to the present invention, the first group of cylindrical members and the second group of cylindrical members are rotated along with the rotation of the first rotation lever and the second rotation lever. It is preferable that a separation preventing means for preventing the end of the conductor segment from coming off from the holding groove is provided so as to gradually approach the other end surface of the stator core.

  According to the above aspect, when the bending process of the end portion of the conductor segment proceeds with the rotation of the first rotating lever and the second rotating lever, the protruding height of the end portion of the conductor segment from the other end surface of the stator core. However, by gradually bringing the first group of cylindrical members and the second group of cylindrical members closer to the other end surface of the stator core, it is possible to prevent the end portions of the conductor segments from slipping out of the holding grooves.

  In one preferable aspect of the present invention, the detachment preventing unit includes a pressing unit that presses each of the first group of cylindrical members and the second group of cylindrical members toward the other end surface of the stator core.

  According to the above aspect, the bending process of the end portion of the conductor segment proceeds with the turning operation of the first rotating lever and the second rotating lever, and the protruding height of the end portion of the conductor segment from the other end surface of the stator core. Since the first group of cylindrical members and the second group of cylindrical members are pressed toward the other end surface of the stator core even if the height gradually decreases, the end portions of the conductor segments will not come out of the holding grooves. Further, the bending of the end portion of the conductor segment can be promoted by the pressing force.

  In another preferred aspect of the present invention, the detachment preventing means has the wide slit provided in the first group of cylindrical members and the second group of cylindrical members as a cam groove, and the first rotating lever and the first group. When the two-turn lever rotates and slides through the wide slit, the corresponding cylindrical member is configured to be pressed toward the other end surface of the stator core.

  According to the above aspect, when the first rotary lever and the second rotary lever rotate and slide through the wide slit, the corresponding cylindrical member is pressed toward the other end surface of the stator core, so that the cylindrical member rotates. The operation and the pressing operation toward the other end surface of the stator core can be synchronized and performed by the same drive source.

  In the conductor segment end forming apparatus of the present invention, the cylindrical member is disposed on the inner periphery of the cylindrical member located at the innermost periphery of the first group of cylindrical members and the second group of cylindrical members. An inner guide wall that restricts the end of the conductor segment held in the holding groove from protruding inward is disposed, and the outer periphery of the cylindrical member located at the outermost periphery is held in the holding groove of the cylindrical member. It is preferable that an outer guide wall that restricts the end of the conductor segment protruding outward is disposed.

  According to the above aspect, the plurality of cylindrical members can be smoothly rotated using the inner guide wall and the outer guide wall as a guide, and the end of the conductor segment located at the innermost periphery is bent into the inner periphery along with the bending process. The outer guide wall can prevent the end portion of the conductor segment located at the outermost periphery from jumping out to the outer peripheral side due to bending.

In the stator manufacturing method of the present invention, both end portions of the plurality of conductor segments are inserted from the one end surface side of the stator core into a predetermined slot in a predetermined arrangement, and are inserted from the other end surface side of the stator core. A conductor segment insertion step in which the ends of the conductor segments are arranged concentrically;
The end portions of the conductor segments inserted from the other end surface side of the stator core and concentrically arranged are respectively held, and the end portions located on the same circumference are adjacent to each other in the same direction and in the radial direction of the concentric circles. Bending process for moving and bending in the circumferential direction so that the ends to be alternately turned in opposite directions;
A bonding step of bonding predetermined end portions of the conductor segments adjacent to each other by the bending process so as to be electrically connected;
In the bending step, the end portion of the conductor segment is inserted and held in the corresponding holding groove of the first group of cylindrical members and the second group of cylindrical members using the end portion forming device. The first rotating lever and the second rotating lever are rotated in opposite directions by the driving device, and the first group of cylindrical members and the second group of cylindrical members are rotated in opposite directions, respectively. Thus, the end portion of the conductor segment held by the first group of cylindrical members is bent in one circumferential direction, and the end portion of the conductor segment held by the second group of cylindrical members is bent in the circumferential direction. It is characterized by bending in the opposite direction.

  According to the stator manufacturing method of the present invention, the end portion of the conductor segment protruding from the other end surface of the stator core using the end portion forming device, the end portions located on the same circumference are in the same direction, and End portions adjacent to each other in the radial direction of the concentric circles can be bent by being moved in the circumferential direction so as to be alternately opposite to each other. Thereby, the end portion bent in one direction of the conductor segment and the end portion bent in the other direction of the other conductor segment to be conducted can be brought close to each other and joined.

  In the stator manufacturing method of the present invention, the end portion of the conductor segment that protrudes from the other end surface of the stator core is held by the first group of cylindrical members, and the second group of cylindrical members. It is preferable to perform the said bending process by arrange | positioning a cylindrical insulation sheet between the edge parts hold | maintained.

  According to the said aspect, arrange | positioning a cylindrical insulating sheet between the edge part hold | maintained at the 1st group cylindrical member of the conductor segment, and the edge part hold | maintained at the 2nd group cylindrical member. Thus, in the bending process, it is possible to prevent the bent ends of the conductor segments from contacting each other and causing dielectric breakdown or the like.

  According to the present invention, the narrow slit formed on the opposing circumferential surface of the first group of cylindrical members and the wide slit formed on the opposing circumferential surface of the second group of cylindrical members are respectively penetrated and rotated. A first rotating lever that rotates only the first group of cylindrical members by a moving operation; a narrow slit formed on the opposing circumferential surfaces of the second group of cylindrical members; and an opposing circumference of the first group of cylindrical members. By rotating a second rotation lever that passes through the wide slit formed on the surface and rotates only the second group of cylindrical members by a rotation operation in the reverse direction by the driving device, The cylindrical member and the second group of cylindrical members are rotated in opposite directions, and the end portions of the conductor segments held by the first group of cylindrical members are bent in one circumferential direction. The end of the conductor segment held by the member is the above in the circumferential direction. Because it can be bent in the other direction opposite the ends of a plurality of conductor segments it can work with good bending mold by a relatively simple mechanism. Then, the end portion bent in one direction of the conductor segment and the end portion bent in the other direction of the other conductor segment to be conducted can be brought close to each other and joined.

FIG. 6 is a perspective view showing a state in which a plurality of conductor segments are inserted in a predetermined arrangement from a first end surface side of the stator core into a predetermined slot and set so that ends inserted from the second end surface side of the stator core are arranged concentrically. is there. It is a perspective view which shows the state before the setting of a stator core which shows one Embodiment of the edge part shaping | molding apparatus of the conductor segment of this invention. It is a perspective view which shows the state which installed the stator core in the same edge part shaping | molding apparatus. It is a perspective view which shows the state which set the innermost cylindrical member to the same edge part shaping | molding apparatus. It is a perspective view which shows the state which set all the cylindrical members to the end part shaping | molding apparatus, and inserted the 1st rotation lever and the 2nd rotation lever. It is a partial expansion perspective view which shows the state which inserted the 1st rotation lever and the 2nd rotation lever in the cylindrical member. It is explanatory drawing which shows the 1st group cylindrical member and the 2nd group cylindrical member. It is a top view which shows the state before rotating the cylindrical member of the 1st group and the 2nd group of cylindrical members in the end part shaping | molding apparatus. It is a top view which shows the state after rotating the 1st group cylindrical member and the 2nd group cylindrical member in the end part shaping | molding apparatus. It is front sectional drawing of the end part shaping | molding apparatus. It is a partial expanded sectional view which shows the overlapping state of the 1st group cylindrical member and the 2nd group cylindrical member of the end part shaping | molding apparatus. It is explanatory drawing which shows the first half process of rotation operation | movement with the 1st group cylindrical member and the 2nd group cylindrical member of the end part shaping | molding apparatus. It is explanatory drawing which shows the latter half process of the rotation operation | movement with the 1st group cylindrical member and the 2nd group cylindrical member of the end part shaping | molding apparatus. It is explanatory drawing which shows the change of the bending state of the edge part of the conductor segment by the end part shaping | molding apparatus. It is a side view which shows the state which bent the edge part of the conductor segment with the end part shaping | molding apparatus. It is a perspective view which shows an example of the connection structure of a segment conductor. It is a perspective view which shows the state which joined the segment conductor. It is explanatory drawing which shows other embodiment which made the separation prevention means which presses a cylindrical member toward the end surface of a stator core by using the wide slit of a cylindrical member as a cam groove.

  Hereinafter, an embodiment of an end forming apparatus for a segment conductor according to the present invention will be described with reference to the drawings.

  FIG. 1 shows a state in which a plurality of conductor segments 102 are inserted into the slot 101 from one end surface side of the stator core 100 and the extended end portion 105 is inserted from the other end surface side of the stator core 100. A slot insulating paper 103 is inserted in advance on the inner periphery of the slot 101 and is folded and attached in a cuff shape from both end faces of the stator core 100.

The conductor segment 102 is formed of an insulation-coated square line bent in a substantially U shape before being bent, and as shown in FIG. 16, a bent end 104 protruding from one end surface side of the stator core 100. And an extended end portion 105 protruding from the other end surface side of the stator core 100 and a linear portion 107 inserted into the slot 101. FIG. 16 shows a state where the extended end portion 105 has already been bent.
As shown in FIG. 1, the extended end portion 105 of the conductor segment 102 is inserted from the other end surface side of the stator core 100, and is concentrically arranged in the slot 101 and set. When not bent, the extended end portions 105 of the conductor segments 102 extend linearly and stand in parallel with each other.

As shown in FIG. 2, the conductor segment end forming apparatus 200 includes a rectangular substrate 201, columns 202 erected from the four corners thereof, both side frames 203 that connect the columns 202 on both sides, And a front / rear lower frame 206 for connecting the column 202 at the section. Bearing plates 207 are installed at the upper ends of both ends of the pair of both side frames 203, and the pair of bearing plates 207 located at the front and the pair of bearing plates 207 located at the rear are separated by the front and rear upper frame 205. It is connected.
Ball screws 208 are inserted into and supported by a pair of bearing plates 207 installed on the respective side frames 203. The pair of ball screws 208 are arranged in parallel. The ball screw 208 is formed with male screws 209 and 210 opposite to each other in the winding direction with the middle portion as a boundary.

  A handle 211 is attached to one end of each of the pair of ball screws 208. A timing timing pulley 212 is attached adjacent to the handle 211, and a timing belt 213 is stretched between the pair of timing pulleys 212. For this reason, when the handle 211 is rotated, the pair of ball screws 208 are rotated in synchronization in the same direction via the timing pulley 212 and the timing belt 213.

  Referring also to FIG. 9, slide rails 204 are installed on the respective side frames 203. A first moving block 214a and a second moving block 214b are slidably mounted on each slide rail 204. The pair of first moving blocks 214a and the pair of second moving blocks 214b are arranged in a diagonal direction. The male screws 209 and 210 positioned in one diagonal direction of the pair of ball screws 208 are screwed into the first moving block 214a, and the male screws 209 and 210 positioned in the other diagonal direction are moved in the second direction. Screwed into the block 214b.

  A support plate 215 is attached to the first moving block 214a and the second moving block 214b via a support shaft 219 so as to be rotatable in the horizontal direction. The support shaft 219 is inserted into a long hole 227 provided in the support plate 215, and pivotally supports the support plate 215 so as to be movable along the long hole 227. A support block 216 is attached to the support plate 215. The first rotation lever 217 is inserted and supported in the support block 216 supported on the first moving block 214a, and the second rotation lever 218 is inserted and supported in the support block 216 supported on the second moving block 214b. Has been. The first rotation lever 217 and the second rotation lever 218 are inserted into the support block 216 so that their protruding lengths can be adjusted, and can be fixed by fixing means (not shown) at any protruding length position.

  As described above, when the handle 211 is rotated, the pair of ball screws 208 are rotated in the same direction via the timing pulley 212 and the timing belt 213, and thereby the first ball screw 208 mounted on the same ball screw 208 is rotated. The moving block 214a and the second moving block 214b move so as to approach or separate from each other.

  A core column 221 is erected at the center of the substrate 201 via a support base 220. The upper end portion of the core support 221 forms a support shaft 222 that extends in a stepped shape. A cylindrical inner guide wall 223 is rotatably mounted on the outer periphery of the support shaft 222 via an annular spacer 226. The inner guide wall 223 has a first rotating lever 217 and a second rotating lever 217. A total of four support holes 224 into which the protruding end portions of the rotation lever 218 are inserted are formed at intervals of 90 degrees.

  As shown in FIG. 4, the stator core 100 is installed on the outer periphery of the core support column 221. Further, a holding jig 230 is installed on the outer periphery of the inner guide wall 223 as shown in FIG.

  As shown in FIG. 7, the holding jig 230 includes a first group of cylindrical members 240 and a second group of cylindrical members 250. The first group of cylindrical members 240 includes four cylindrical members 241, 242, 243, and 244, and the second group of cylindrical members 250 includes four cylindrical members 251, 252, 253, and 254. That is, in this embodiment, the holding jig 230 includes a total of eight cylindrical members 241 to 244 constituting the first group of cylindrical members 240 and cylindrical members 251 to 254 constituting the second group of cylindrical members 250. It is composed of a cylindrical member. As shown in FIG. 7 (i), the cylindrical members 241 to 244 constituting the first group of cylindrical members 240 are arranged concentrically every other one from the innermost side, and constitute the second group of cylindrical members 250. As shown in FIG. 7 (j), the cylindrical members 251 to 254 are arranged concentrically every other one so as to be positioned between the cylindrical members 241 to 244, and these are shown in FIGS. Thus, the holding jig 230 is configured so as to overlap concentrically.

  As shown in FIG. 7, the cylindrical members 241 to 244 constituting the first group of cylindrical members 240 are formed with a pair of narrow slits 231 at the upper portions facing in the circumferential direction, and are orthogonal to the narrow slits 231. A pair of wide slits 232 are formed in the lower portion facing in the circumferential direction. The cylindrical members 251 to 254 constituting the second group of cylindrical members 250 are formed with a pair of wide slits 232 in the upper portion facing in the circumferential direction, and the lower portion facing in the circumferential direction orthogonal to the wide slit 232. A pair of narrow slits 231 is formed in the first and second slits.

  In this embodiment, the pair of narrow slits 231 and the pair of wide slits 232 are formed in directions orthogonal to each other, but they do not necessarily have to be orthogonal to each other and intersect at a predetermined angle. It only needs to be in the direction.

  Further, all of the cylindrical members 241 to 244 constituting the first group of cylindrical members 240 and the cylindrical members 251 to 254 constituting the second group of cylindrical members 250 have extended ends of the conductor segments 102 at their lower ends. A holding groove 233 for receiving 105 is formed. As shown in FIG. 11, the extended end portion 105 held in the holding groove 233 provided in the cylindrical members 241 to 244 constituting the first group of cylindrical members 240 is defined as the first extended end portion 105a, and the second Assuming that the extended end portion 105 held in the holding groove 233 provided in the cylindrical members 251 to 254 constituting the cylindrical member 250 of the group is the second extended end portion 105b, the first extended end portion 105a and the second extended end portion 105a. The extended end portions 105 b are arranged alternately in the radial direction in the slot 101. As shown in FIG. 5, a cylindrical outer guide wall 225 is installed on the upper portion of the stator core 100 so as to surround the second extending end portion 105 b arranged on the outermost periphery. .

  As shown in FIGS. 5, 6, and 7, the first rotation lever 217 passes through the narrow slits 231 of the cylindrical members 241 to 244 constituting the first group of cylindrical members 240, and the second group of cylindrical members. The cylindrical members 251 to 254 constituting 250 are inserted so as to penetrate the wide slits 232. The second rotation lever 218 passes through the wide slits 232 of the cylindrical members 241 to 244 constituting the first group of cylindrical members 240 and the cylindrical members 251 to 254 constituting the second group of cylindrical members 250. It is inserted so as to penetrate the narrow slit 231. The rotation range of the first rotation lever 217 and the second rotation lever 218 is set within the range of the opening angle of the wide slit 232 that penetrates each other, in other words, the rotation range that does not contact the opening edges on both sides of the wide slit 232. The Further, the width of each narrow slit 231 is adapted to the outer diameter of the first rotary lever 217 or the second rotary lever 218, and when the first rotary lever 217 and the second rotary lever 218 are rotated, it is almost interlocked with it. Accordingly, the corresponding first group of cylindrical members 240 or second group of cylindrical members 250 are rotated. Therefore, the first rotating lever 217 rotates only the cylindrical members 241 to 244 constituting the first group of cylindrical members 240, and the second rotating lever 218 is the cylindrical member constituting the second group of cylindrical members 250. Only 251 to 254 are rotated.

  As shown in FIG. 11, the protruding length of the extended end portion 105 of the conductor segment 102 protruding from the upper end surface of the stator core 100 is shorter as it is located on the inner diameter side. That is, when the holding jig 230 is rotated at a predetermined angle to bend the extended end portion 105 in the circumferential direction, the end located on the inner diameter side is required to align the distal end of the bent portion in the radial direction. This is because it needs to be kept short.

  For this reason, the upper end surface of the holding jig 230 including the first group of cylindrical members 240 and the second group of cylindrical members 250 received on the extending groove 105 in the holding groove 233 is formed on the inner diameter side. The height decreases in a staircase as it goes to. On the upper end surface of the holding jig 230, a pressing plate 260 having a stepped pressing portion 261 that protrudes in a stepped shape toward the inner diameter is provided on the lower surface side. The pressing plate 260 presses the first group of cylindrical members 240 and the second group of cylindrical members 250 downward by pressing means (not shown), and the extended end portion 105 of the conductor segment 102 is bent to increase its height. Even if the height is lowered, the extended end portion 105 is prevented from being detached from the holding groove 233.

  Next, an embodiment of the stator manufacturing method of the present invention using the segment conductor end forming apparatus having the above-described configuration will be described.

  First, as shown in FIG. 1, both end portions of the plurality of conductor segments 102 are inserted into a predetermined slot 101 in a predetermined arrangement from one end surface side of the stator core 100, and inserted from the other end surface side of the stator core 100. Thus, the extended end portions 105 of the conductor segments 102 are arranged concentrically in the slot 101 of the stator core 100. At this time, as shown in FIG. 11, the first extended end portion 105 a held by the first group of cylindrical members 240 and the second extended end portion 105 b held by the second group of cylindrical members 250 are provided. The stator cores 100 are alternately arranged in the radial direction.

  As shown in FIG. 15 (however, FIG. 15 shows a state after bending), between the first extending end portion 105a and the second extending end portion 105b arranged in the radial direction. Insulating sheet 108 may be inserted. By inserting the insulating sheet 108, it is possible to prevent the insulating coating from being broken due to the strong contact between the first extending end portion 105a and the second extending end portion 105b during bending. The above is the conductor segment insertion step in the present invention.

  On the other hand, as shown in FIG. 2, the conductor segment end forming apparatus 200 has an inner guide wall 223 installed on the outer periphery of the support shaft 222 of the core column 221 via a spacer 226. Further, the first moving block 214 a and the second moving block 214 b mounted on the slide rail 204 are screwed into the ball screw 208 so as to be disposed at predetermined positions of the ball screw 208.

  Then, as shown in FIGS. 2 and 3, the stator core 100 is installed on the outer periphery of the core column 221 and the spacer 226 through the outer periphery of the inner guide wall 223. When the thickness of the stator core 100 is changed, the height of the inner guide wall 223 can be adjusted by adjusting the height of the support base 220 and the spacer 226.

  Next, as shown in FIG. 4, the cylindrical member 241 of the first group of cylindrical members 240 disposed on the innermost side is disposed on the outer periphery of the inner guide wall 223. At this time, the extended end portion 105 (here, the first extended end portion 105a) of the conductor segment 102, which is disposed on the innermost diameter side, is inserted into the holding groove 233 of the cylindrical member 241.

  Similarly, the cylindrical members 251, 242, 252, 243, 253, 244, and 254 shown in FIG. 7 are inserted into their holding grooves 233 so that the extended end portion 105 of the conductor segment 102 is inserted, It arranges concentrically so that it may overlap sequentially from the inside.

  At this time, as shown in FIGS. 6, 7, and 8, the narrow slits 231 and the wide slits 232 of the cylindrical members 241 to 244 of the first group of cylindrical members 240 are aligned, and the cylinders of the second group of cylindrical members 250 are aligned. The narrow slits 231 and the wide slits 232 of the members 251 to 254 are aligned, and the narrow slits 231 of the cylindrical members 241 to 244 of the first group of cylindrical members 240 are aligned with the cylindrical member 251 of the second group of cylindrical members 250. The narrow slits 231 of the cylindrical members 251 to 254 of the second group of cylindrical members 250 are positioned within the wide slits 232 of the cylindrical members 241 to 244 of the first group of cylindrical members 240. Thus, the narrow slit 231 and the wide slit 232 are aligned.

  Then, the pair of first rotation levers 217 is passed through the narrow slits 231 of the cylindrical members 241 to 244 of the first group of cylindrical members 240 and the wide slits 232 of the cylindrical members 251 to 254 in the circumferential direction of the inner guide wall 223. It inserts in the support hole 224 (refer FIG. 2) formed in the position which opposes. Further, the pair of second rotation levers 218 are passed through the narrow slits 231 of the cylindrical members 251 to 254 of the second group of cylindrical members 250 and the wide slits 232 of the cylindrical members 241 to 244 of the first group of cylindrical members 240. The inner guide wall 223 is inserted into a support hole 224 formed at a position facing the circumferential direction orthogonal to the above.

  As a result, the first rotation lever 217 is inserted into the narrow slits 231 of the cylindrical members 241 to 244 of the first group of cylindrical members 240 and into the wide slits 232 of the cylindrical members 251 to 254 of the second group of cylindrical members 250. When the first rotation lever 217 is rotated, the cylindrical members 241 to 244 of the first group of cylindrical members 240 are rotated, but the cylindrical members 251 to 254 of the second group of cylindrical members 250 are rotated. Does not give power. Similarly, the second rotation lever 218 is inserted into the narrow slits 231 of the cylindrical members 251 to 254 of the second group of cylindrical members 250 and is inserted into the cylindrical members 241 to 244 of the first group of cylindrical members 240. Therefore, when the second rotation lever 218 is rotated, the cylindrical members 251 to 254 of the second group of cylindrical members 250 are rotated, but rotational force is applied to the cylindrical members 241 to 244 of the first group of cylindrical members 240. Do not grant.

  Further, as shown in FIG. 10, a pressing plate 260 is placed on the upper end surfaces of the first group of cylindrical members 240 and the second group of cylindrical members 250, and the pressing plate 260 is pressed by pressing means (not shown). To.

  Then, by rotating either one or both of the pair of handles 211 from the state shown in FIG. 8 in a predetermined direction, the pair of ball screws 208 via the timing pulley 212 and the timing belt 213 (see FIG. 2). Are moved in the same direction, the first moving block 214a and the second moving block 214b that are screwed into the male screws 209 and 210 of the ball screw 208 move so as to be close to each other.

  As a result, while the support shaft 219 moves through the long hole 227, the angle of the support plate 215 supported by the first moving block 214a and the second moving block 214b changes, and the first rotation lever 217 and the second rotation. The angle of the lever 218 changes as shown in FIGS. 12A, 12B, 13A, and 13B, and finally the state shown in FIG. 9 is obtained. As a result, the cylindrical members 241 to 244 of the first group of cylindrical members 240 are rotated in a predetermined direction by the first rotating lever 217, and the cylindrical members 251 to 254 of the second group of cylindrical members 250 are rotated by the second rotating lever 218. Rotates in the opposite direction to the above. This rotation angle is, for example, a half magnetic pole pitch.

  As described above, as the cylindrical members 241 to 244 of the first group of cylindrical members 240 and the cylindrical members 251 to 254 of the second group of cylindrical members 250 are rotated, FIGS. 13 (a), 13 (b), and 14, the extended end portion 105 of the conductor segment 102 held in each holding groove 233 is bent. At this time, the first extended end portion 105a held in the holding groove 233 of the cylindrical members 241 to 244 of the first group of cylindrical members 240 and the cylindrical members 251 to 254 of the second group of cylindrical members 250 were held. The bending direction with respect to the second extending end portion 105b is the opposite direction, and finally, as shown in FIGS. 13B and 14, the two end portions are bent and formed in a state in which both end portions are aligned in the radial direction. . Note that FIGS. 12A, 12B, 13A, 13B, and 14 show only a specific first extending end portion 105a and second extending end portion 105b. Actually, as shown in FIG. 15, all the first extending end portions 105a and the second extending end portions 105b are bent and formed in the same manner.

  In addition, although each height becomes low with the bending of the 1st extension end part 105a and the 2nd extension end part 105b, the cylindrical member 240 of the 1st group is shown by the press plate 260 shown in FIG. Since the cylindrical members 241 to 244 and the cylindrical members 251 to 254 of the second group of cylindrical members 250 are pressed downward, they gradually approach the end surface of the stator core 100, and the first extending end portion 105a, It is possible to prevent the second extending end portion 105b from coming out of the corresponding holding groove 233. Further, the pressing force of the pressing plate 260 also becomes a force for promoting the bending of the first extending end portion 105a and the second extending end portion 105b, and the bending can be made easier. The above is the bending process in the present invention.

  As shown in FIG. 16, the end portions of the first extension end portion 105a and the second extension end portion 105b formed by bending are alternately aligned in the radial direction (however, FIG. 16 is a stator core with respect to other drawings). Is shown upside down.) Then, as shown in FIG. 17, in this embodiment, the end portions of the first extending end portion 105a and the second extending end portion 105b that are adjacent in the radial direction are joined to each other by a connecting portion 106 to be conductive. A coil of corrugated winding is formed. The above is the joining process in the present invention.

  As described above, according to the present invention, the cylindrical members 241 to 244 of the first group of cylindrical members 240 and the cylindrical members of the second group of cylindrical members 250 are provided via the first rotating lever 217 and the second rotating lever 218. The first extending end portion 105a held in the holding groove 233 of the cylindrical members 241 to 244 of the first group of cylindrical members 240 and the second group of cylindrical members are rotated by rotating 251 to 254 in the opposite direction. The first extending end portion 105a and the second extending end portion formed by bending the second extending end portion 105b held by the 250 cylindrical members 251 to 254 at the same time in the circumferential direction opposite to each other at the same time. The ends of 105b can be alternately aligned in the radial direction, and can be joined as shown in FIG.

  Since all the conductor segments 102 inserted into the slots 101 of the stator core 100 can be bent at the same time, the workability can be improved. Further, the first rotation lever 217 and the second rotation lever 218 inserted through the narrow slit 231 and the wide slit 232 formed in the first group cylindrical member 240 and the second group cylindrical member 250 are rotated. Since the above-described bending can be performed with a simple structure, the equipment cost can be reduced.

  FIG. 18 shows another embodiment of an end forming apparatus for segment conductors according to the present invention. This embodiment is different from the above-described embodiment in that the first group of cylindrical members 240 and the second group of cylindrical members 250 have cam-shaped wide slits 232a. That is, in the first group of cylindrical members 240 and the second group of cylindrical members 250, in addition to the narrow slits 231, a wide slit 232a having a cam shape is formed. When the first rotary lever 217 or the second rotary lever 218 inserted through the wide slit 232a rotates, no rotational force is applied to the first group of cylindrical members 240 and the second group of cylindrical members 250. A force for moving the first group of cylindrical members 240 and the second group of cylindrical members 250 in the direction of the holding groove 233 is applied. As a result, even if the pressing plate 260 in the embodiment is not provided, a downward pressing force is applied to the first group of cylindrical members 240 and the second group of cylindrical members 250, and the amount of lowering is reduced by the first amount. The rotation angle of the first rotation lever 217 and the second rotation lever 218 can be synchronized. Further, there is an advantage that the first group of cylindrical members 240 and the second group of cylindrical members 250 can be lowered by one driving means. In this case, by gradually changing the cam shape of the wide slit 232a provided in the cylindrical members 241 to 244 and 251 to 254 arranged in the radial direction, the descending amount of the cylindrical member is increased toward the outer diameter side and decreased toward the inner diameter side. Can also be set. Thereby, the final descending position after being bent is aligned on the inner diameter side and the outer diameter side, so that more accurate bending can be performed.

  In the above embodiment, the first group of cylindrical members 240 and the second group of cylindrical members 250 are lowered as the extended end portion 105 of the conductor segment 102 is bent, but the stator core 100 is raised. It can also be made to do.

100 Stator Core 101 Slot 102 Conductor Segment 103 Slot Insulating Paper 104 Bending End 105 Extension End 105a First Extension End 105b Second Extension End 106
200 Conductor Segment End Forming Device 201 Substrate 202 Support Column 203 Both Sides Frame 204 Slide Rail 205 Front and Back Upper Frame 206 Front and Back Lower Frame 207 Bearing Plate 208 Ball Screw 209 Male Screw 210 Male Screw 211 Handle 212 Timing Pulley 213 Timing Belt 214a First Moving Block 214b Second moving block 215 Support plate 216 Support block 217 First rotation lever 218 Second rotation lever 219 Support shaft 220 Support base 221 Core support 222 Support shaft 223 Inner guide wall 224 Support hole 225 Outer guide wall 226 Spacer 227 Slot 230 Holding jig 231 Narrow slit 232 Wide slit 233 Holding groove 240 First group of cylindrical members 241 to 244 Cylindrical member 250 Second group of cylindrical members 251 to 254 Cylindrical member 260 Plate 261 stage-like pressing portion

Claims (8)

In an end molding apparatus for a plurality of conductor segments, which are inserted in a predetermined arrangement from one end surface side of the stator core in a predetermined array and set so that the end portions inserted from the other end surface side of the stator core are arranged concentrically. ,
A holding groove for holding the end of the conductor segment is formed on the lower end surface, and a narrow slit formed on the opposing circumferential surface, and a wide slit formed on the opposing circumferential surface intersecting the narrow slit. A plurality of first group of cylindrical members having a plurality of conductor segments set in a concentric circle and inserted into the holding groove and held at every other end in the radial direction; ,
A holding groove for holding the end of the conductor segment is formed on the lower end surface, and a narrow slit formed on the opposing circumferential surface, and a wide slit formed on the opposing circumferential surface intersecting the narrow slit. Among the end portions of the plurality of conductor segments that are concentrically arranged and are not held by the first group of cylindrical members, the ones arranged in the radial direction are inserted into the holding groove. Holding a plurality of second group cylindrical members;
The narrow slits formed on the opposing circumferential surfaces of the first group of cylindrical members and the wide slits formed on the opposing circumferential surfaces of the second group of cylindrical members are respectively penetrated, and are rotated by the rotation operation. A first rotating lever for rotating only the first group of cylindrical members;
The narrow slits formed on the opposing circumferential surfaces of the second group of cylindrical members and the wide slits formed on the opposing circumferential surfaces of the first group of cylindrical members are respectively penetrated, and are rotated by the rotation operation. A second rotating lever for rotating only the second group of cylindrical members;
A driving device that rotates the first rotation lever and the second rotation lever in opposite directions to rotate the first group of cylindrical members and the second group of cylindrical members in opposite directions; A device for forming an end portion of a conductor segment.   The pair of driving devices are arranged in parallel with the first group of cylindrical members and the second group of cylindrical members in between, and the directions of the screw grooves are opposite to each other with the axial intermediate portion as a boundary. A ball screw, a first moving block threadedly engaged with the diagonally located end portions of the pair of ball screws, and a threadedly engaged end portion of the pair of ball screws located in a different diagonal direction. And a second interlocking mechanism that simultaneously rotates the pair of ball screws to move the first moving block and the second moving block toward each other or away from each other. 2. The conductor segment end forming device according to claim 1, wherein the one rotation lever is pivotally supported by the first moving block, and the two rotation lever is pivotally supported by the second moving block.   As the first rotating lever and the second rotating lever rotate, the distance between the first group of cylindrical members and the second group of cylindrical members and the other end surface of the stator core is gradually made closer. The apparatus for forming an end portion of a conductor segment according to claim 1 or 2, wherein a separation preventing means for preventing the end portion of the conductor segment from coming off from the holding groove is provided.   4. The conductor segment end molding according to claim 3, wherein said separation preventing means comprises pressing means for pressing each of said first group of cylindrical members and said second group of cylindrical members toward the other end surface of said stator core. apparatus.   The detachment preventing means uses the wide slits provided in the first group of cylindrical members and the second group of cylindrical members as cam grooves, and the first rotation lever and the second rotation lever rotate to 4. The conductor segment end forming apparatus according to claim 3, wherein when the wide slit is slid, the corresponding cylindrical member is pressed against the other end surface of the stator core.   Of the cylindrical member of the first group and the cylindrical member of the second group, the inner end of the cylindrical member located at the innermost periphery has an end portion of the conductor segment held in the holding groove of the cylindrical member inward An inner guide wall that restricts the protrusion of the cylindrical member is disposed, and the end of the conductor segment held in the holding groove of the cylindrical member is restricted from protruding outward on the outer periphery of the cylindrical member located on the outermost periphery. The end part shaping | molding apparatus of the conductor segment of any one of Claims 1-5 by which the outer side guide wall to arrange | position is arrange | positioned. Both end portions of the plurality of conductor segments are inserted into a predetermined slot in a predetermined arrangement from one end surface side of the stator core, and the end portions of the conductor segments inserted from the other end surface side of the stator core are concentric. Conductor segment insertion process to be aligned,
The end portions of the conductor segments inserted from the other end surface side of the stator core and concentrically arranged are respectively held, and the end portions located on the same circumference are adjacent to each other in the same direction and in the radial direction of the concentric circles. Bending process for moving and bending in the circumferential direction so that the ends to be alternately turned in opposite directions;
A bonding step of bonding predetermined end portions of the conductor segments adjacent to each other by the bending process so as to be electrically connected;
In the bending step, using the end forming apparatus according to any one of claims 1 to 6, the end portions of the conductor segments are connected to the first group of cylindrical members and the second group of cylindrical members. The first rotating lever and the second rotating lever are rotated in opposite directions by the driving device and inserted into the corresponding holding groove, and the first group of cylindrical members and the second group of the second group are rotated. By rotating the cylindrical members in opposite directions, the end portions of the conductor segments held by the first group of cylindrical members are bent in one circumferential direction and held by the second group of cylindrical members. A method of manufacturing a stator, wherein the end of the conductor segment is bent in a direction opposite to the circumferential direction.   The end of the conductor segment protruding from the other end surface of the stator core, between the end held by the first group of cylindrical members and the end held by the second group of cylindrical members, The stator manufacturing method according to claim 7, wherein a cylindrical insulating sheet is arranged to perform the bending process.

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