JP2008148521A - Chuck device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chuck device for compressing a conductor segment.
A chuck apparatus 1 of the present invention includes cored bar portions 100, 110, chuck claws 101, 111, and pressing members 102, 112, and the chuck claws 101, 111 are displaced to shift the cored bar portion. In the holding space 104 defined by 100 and 110 and the two chuck claws 101 and 111, the conductor segment 2 doubles the straight portion of the U-shaped conductor segment 2 fitted and inserted into the slot of the stator core. Are inserted in a state in which a plurality of layers are laminated in the radial direction of the cored bar portions 100 and 110, and the pressing members 102 and 112 are displaced radially inward to compress the linear portion of the conductor segment 2 in the radial direction. It is characterized by doing.
[Selection] Figure 1

Description

  The present invention relates to a coil chucking device, and more particularly to a chucking device used for forming a coil having a plurality of U-shaped conductor segments in the radial direction.

  Conventionally, for example, in a rotating electric machine such as a generator or an electric motor, a large number of conductor segments having a predetermined shape are inserted and assembled into slots of a stator core (stator core), and then the ends of the conductor segments are joined together. There is known a stator coil formed as described above.

  As shown in FIG. 4, each conductor segment is provided in a U-shape in advance. From this U-shape, as shown in FIG. 6, two straight lines extending in parallel through a U-shaped curved portion. By pulling the parts away in the opposite direction, the U-shaped bent part is twisted, and then the two straight parts are inserted into the slots of the stator core and assembled.

  And this twist forming is performed by the twist forming apparatus which has the twist forming jig comprised by the inner side ring part and outer side ring part which were combined so that relative rotation was possible. In this twist forming apparatus, each of the inner ring portion and the outer ring portion is formed with a rectangular holding groove for holding the straight portion of the conductor segment, and this holding groove is arranged in the circumferential direction of both ring portions in the stator core. The same number as the number of slots is provided at equal intervals. Then, the straight portion of the conductor segment is inserted and held in the holding groove of the inner ring portion and the holding groove of the outer ring portion, and twisting is performed by shifting both the ring portions in different directions relative to the circumferential direction. .

  In recent years, in rotating electrical machines such as generators and electric motors, higher performance has been demanded, and it has been studied to increase the number of turns of a coil. In a rotating electrical machine, a configuration in which conductor segments are not only doubled as shown in FIGS. 4 and 6, but a plurality of conductor segments are arranged in the radial direction of the coil has been studied. In order to twist the conductor segment in such a configuration, as shown in FIG. 5, as shown in FIG. 5, the inner forming jig 50 including the first inner ring portion 51 and the first outer ring portion 52, and the inner forming A twist forming apparatus having an outer forming jig 55 provided with a second inner ring portion 56 and a second outer ring portion 57 disposed on the outer periphery of the jig 50 will be used. In this twist forming apparatus, the first inner ring portion 51 and the second inner ring portion 56 and the first outer ring portion 52 and the second outer ring portion 57 are twisted by shifting the respective ring portions in different directions. Perform molding.

  However, when twist forming is performed with such a twist forming apparatus, the distance between the outermost periphery of the conductor segment group formed by the first ring portion 50 and the innermost periphery of the conductor segment group formed by the second ring portion 55 is set. There will be a gap. When this gap exists, there is a problem that it is difficult to fit and insert the conductor segment into the slot of the stator core. Further, when the slot shape corresponds to this gap, there is a problem that the volume efficiency of the rotating electrical machine is reduced.

  The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a chuck device that compresses a conductor segment so as not to have a gap in the radial direction so as to provide a rotating electrical machine having excellent volume efficiency. And

  In order to solve the above-mentioned problems, the present inventors have studied the chuck device for compressing the conductor segment in the radial direction, and as a result, have come to make the present invention.

  The chuck device according to the first aspect of the present invention includes a cored bar portion having an outer peripheral surface coinciding with the inner peripheral surface of the coil when the coil is formed, and a cored bar that is displaceable in the radial direction of the cored bar portion. A plurality of chuck claws provided on the outer periphery of the portion, and a pressing member provided on the chuck claws so as to be capable of changing in a radial direction between two chuck claws adjacent in the circumferential direction. In the holding space divided by the cored bar part and the two chuck claws, the conductor segments overlapped the straight part of the U-shaped conductor segment that fits and is inserted into the slot of the stator core. In this state, it is inserted in a state in which a plurality of layers are laminated in the radial direction of the cored bar portion, and the pressing member is displaced radially inward to compress the linear portion of the conductor segment in the radial direction.

  According to the above chuck device, after inserting the linear portion of the conductor segment into the holding space defined by the chuck claw and the cored bar portion, the pressing member is displaced inward in the radial direction. The straight portions can be pushed inward in the radial direction so that the straight portions can be brought into close contact with each other. Thereby, the operation | work which inserts the conductor segment performed in a post process in the slot of an iron core is attained. Moreover, the volumetric efficiency of the rotating electrical machine is increased because the straight portion of the segment can be inserted into one slot.

  A chuck device according to a second aspect of the present invention is the chuck device according to the first aspect, wherein the chuck pawl has a guide groove extending in a radial direction, and the pressing member is inserted into the guide groove in a reciprocable manner. The guide protrusion is provided. With such a configuration, the pressing member can be disposed on the chuck pawl in a state where the pressing member can be shifted in the radial direction. Also, the guide groove extends in the radial direction, so that the pressing member is displaced in the radial direction, which is the direction in which the guide groove extends.

  According to a third aspect of the present invention, there is provided a chuck device according to the first aspect of the present invention, wherein the chuck device according to the first aspect has drive means for moving the chuck claw and the pressing member in the radial direction. With such a configuration, the pressing member is moved inward in the radial direction in conjunction with the movement of the chuck pawl, thereby continuously pressing and compressing the linear portion of the conductor segment inward in the radial direction. It can be carried out. The drive means preferably uses a cam and a drive device that drives the cam.

  A chuck device according to a fourth aspect of the present invention is the chuck device according to the first aspect, wherein the chuck claw and the pressing member have a plurality of stages in the axial direction of the cored bar portion. With such a configuration, the linear portion of the conductor segment is compressed in a plurality of stages such as two stages or three stages, and the occurrence of deviation of the linear portion of the conductor segment during compression can be suppressed. In particular, it is effective for compressing conductor segments having a long straight portion.

  A chuck device according to a fifth aspect of the present invention is the chuck device according to the first aspect, wherein the chuck device is located on an upper portion of a twist forming device for twist forming a conductor segment. By positioning the chuck device on the upper portion of the twist forming device, the conductor segment that has been twisted by the twist forming device can be immediately compressed (chucked).

  The best mode for carrying out the present invention will be described in detail with reference to the following examples.

  As an example of the present invention, a chuck device was manufactured.

(Example 1)
The chuck device 1 according to the present embodiment includes chuck portions 10 and 11 including core metal parts 100 and 110, chuck claws 101 and 111, pressing members 102 and 112, coil springs 103 and 113, and the like. In the chuck device 1 of this embodiment, the two chuck portions 10 and 11 are arranged side by side in the axial direction. The configuration of the chuck device 1 of this embodiment is shown in FIG.

  In the chuck device 1 of the present embodiment, the two chuck portions 10 and 11 have the same configuration, and the configuration of the chuck portion 10 will be described below.

  The metal core 100 forms an inner diameter reference at the time of coil forming (positions the inner diameter end of the conductor segment 2), and is provided in a cylindrical shape. The core metal fitting 100 may have not only a cylindrical shape but also a columnar shape as long as the inner diameter end of the conductor segment 2 can be positioned.

  The chuck claws 101 are members that are radially arranged on the outer periphery of the core metal fitting 100. A holding space 104 is formed between the chuck claws 101 adjacent to each other in the circumferential direction, and the chuck claws 101 have a diameter. Forward position in the direction (a position where the tip surface of the chuck claw 101 abuts the outer periphery of the core metal 100) and a backward position in the radial direction (for example, as shown in FIG. And a position separated from the outer periphery of the core metal 100) so as to be able to reciprocate in the radial direction of the core metal 100.

  Further, when the chuck claw 101 is in the retracted position, an annular space for taking in the conductor segment group is secured around the core metal fitting 100.

  Further, the chuck claw 101 is formed so that the cross section has a sagittal shape. When the chuck claw 101 is formed in such a shape, when the chuck claw 101 is in a radially inward advance position (a position where the tip end surface is in contact with the outer periphery of the core metal 100), the adjacent chuck claw 101 The holding space 104 defined between the core metal 100 and the core metal 100 is defined in a shape extending in the radial direction with the width of the conductor segment 2.

  The pressing member 102 is a member provided to be movable in the radial direction corresponding to the holding space 104. The pressing member 102 is a substantially plate-like member having the width (circumferential width) of the holding space 104 defined between the two chuck claws 100 and presses the conductor segment 2 at the radially inner end face. Do (chuck).

  The chuck claw 101 is formed with a guide groove 1010 extending in the radial direction, and the pressing member 102 is provided with a guide pin 1020 inserted into the guide groove 1010 so as to be able to reciprocate. Further, an elastic member for biasing the guide pin 1020 radially inward (in this embodiment, the coil spring 105 is used, but the guide pin 1020 is biased radially outward in the guide groove 1010. If it is a member which can do, it will not be specifically limited). Due to the action of the guide groove 1010 and the guide pin 1020, the displacement direction of the pressing member 102 is restricted to the radial direction.

  The coil spring 105 biases the guide pin 1020 radially outward in the guide groove 1010. That is, the guide pin 1020 is urged to the end portion on the inner diameter side of the guide groove 1010. As a result, the pressing member 102 is urged to a radially inner position.

  The chuck device 1 of the present embodiment has a cam mechanism for moving the chuck claw 101 in the radial direction.

  As shown in FIG. 3, the cam mechanism includes a rotatable disk-shaped plate 30 in which a cam groove 300 is formed, and a cam pin 1011 protruding from the chuck claw 101.

  The cam grooves 300 are linearly formed along the tangential direction of the plate 30, and a predetermined number of cam grooves 300 are separately formed on the inner diameter side and the outer diameter side of the plate 30.

  In the cam mechanism, when the plate 30 is rotated by the driving means 35, the cam groove 300 changes. The cam pin 1011 moves in the cam groove 300 according to the change of the cam groove 300. At this time, the chuck claw 101 moves in the radial direction together with the cam pin 1011. As a result, the chuck claw 101 changes in the radial direction.

  The chuck device 1 of the present embodiment has a chuck portion 11 having the same configuration as the chuck portion 10 above the chuck portion 10 (above the core metal 100 in the axial direction). The chuck portion 11 has the same configuration as the chuck portion 10 and will not be particularly described. The core fitting 100 of the chuck portion 10 and the core fitting 110 of the chuck portion 11 may be integrated as in this embodiment.

  The chuck device 1 of this embodiment is disposed above the twist forming device 5. With this configuration, the conductor segment that has been twisted is pulled up, held at a predetermined position of the chuck device 1, and the conductor segment is compressed.

  The conductor segment 2 processed by the chuck device 1 and the twisting device 5 of this embodiment has a long plate U shape that is covered with a resin film (insulating film) except for the end. The conductor segment 2 includes a first conductor segment 20, a second conductor segment 21, a third conductor segment 22, and a fourth conductor segment 23. The conductor segment 2 of this embodiment is processed in a state in which the first conductor segment 20 and the second conductor segment 21, and the third conductor segment 22 and the fourth conductor segment 23 are overlapped. A state in which the first conductor segment 20 and the second conductor segment 21 are overlapped is shown in FIG. The state in which the third conductor segment 22 and the fourth conductor segment 23 are overlapped is the same as the state shown in FIG.

  The twist forming apparatus 5 includes a first twist forming jig 50 and a second twist forming jig 55. As shown in FIG. 5, the first and second twist forming jigs are constituted by annular inner ring portions 51 and 56 and outer ring portions 52 and 57 which are combined so as to be relatively rotatable, and are radially arranged. The inner ring portion 51 and the outer ring portion 52 constituting the first twist forming jig 50 and the inner ring portion 56 and the outer ring portion 57 constituting the second twist forming jig 55 are sequentially arranged from the inner side to the outer side. Are arranged concentrically. That is, the second twist forming jig 55 is disposed concentrically outside the first twist forming jig 50 in the radial direction.

  The inner ring portion 51 (first inner ring portion 51) used for the first twist forming jig 50 has two conductor layers, a first conductor segment 20 and a second conductor segment 21, which are doubled. An inner holding groove 50a for holding one of the straight portions 20a, 20b, 21a, 21b is formed, and this inner holding groove 50a is formed in the circumferential direction of the first inner ring portion 51. Are provided at equal intervals by the same number as the number of slots. The inner holding groove 50a is formed in a rectangular shape that is long in the radial direction of the first inner ring portion 51 (size that allows two straight portions to be inserted), and the outer peripheral side of the inner holding groove 50a is the first inner ring groove 51a. The ring portion 50 is open to the outer peripheral surface.

  The outer ring portion 52 (first outer ring portion 52) used in the first twist forming jig 50 has two conductor layers, the first conductor segment 20 and the second conductor segment 21 that are doubled. Outer holding groove 52a for holding the other straight portions 20b, 21b is formed among the straight portions 20a, 20b, 21a, 21b, and the outer holding groove 52a is formed in the circumferential direction of the first outer ring portion 52. Are provided at equal intervals by the same number as the number of slots. The outer holding groove 52a is formed in a rectangular shape that is long in the radial direction of the first outer ring portion 52 (size that allows two straight portions to be inserted), and the inner peripheral side of the outer holding groove is the first outer side. Opened to the inner peripheral surface of the ring portion.

  The inner ring portion 56 (second inner ring portion 56) used for the second twist forming jig 55 has two conductors, the third conductor segment 22 and the fourth conductor segment 23, which are doubled. An inner holding groove 56a for holding one of the straight portions 22a, 22b, 23a, 23b is formed, and the inner holding groove 56a is formed in the circumferential direction of the second inner ring portion 56. Are provided at equal intervals by the same number as the number of slots. The inner holding groove 56a is formed in a rectangular shape that is long in the radial direction of the third inner ring portion 56 (size that allows insertion of two straight portions), and the outer peripheral side of the inner holding groove 56a is the third inner ring portion 56a. The ring portion 56 is open to the outer peripheral surface.

  The outer ring portion 57 (second outer ring portion 57) used for the second twist forming jig 55 has two conductors, a third conductor segment 22 and a fourth conductor segment 23, which are doubled. Outer holding groove 57a for holding one of the straight portions 22a, 22b, 23a, 23b is formed, and this outer holding groove 57a is formed in the circumferential direction of the second outer ring portion 57. Are provided at equal intervals by the same number as the number of slots. The outer holding groove 57a is formed in a rectangular shape that is long in the radial direction of the second outer ring portion 57 (size that allows insertion of two straight portions), and the inner peripheral side of the outer holding groove is the first outer side. Opened to the inner peripheral surface of the ring portion.

  The first twist forming jig 50 and the second twist forming jig 55 are formed before the first to fourth conductor segment groups are twisted, that is, the first and second twist forming jigs 50 are first and second. The inner holding groove 51a formed in the first inner ring portion 51 and the second conductor segment group are set, and the third and fourth conductor segment groups are set in the second twist forming jig 55. A circumferential position with the outer holding groove 52a formed in one outer ring portion 52, and an outer holding formed in the inner holding groove 56a and second outer ring portion 57 formed in the second inner ring portion 56. The positions in the circumferential direction with the groove 57a are all aligned.

  The twist forming device 5 is a driving means (relative to the circumferential direction) of the inner ring portions 51 and 56 and the outer ring portions 52 and 57 of the first twist forming jig 50 and the second twist forming jig 55. Not shown).

  The operations of the chuck device 1 and the twist forming device 5 of this embodiment will be specifically described below.

  First, the first conductor segment 20 and the second conductor segment 21 are overlapped, and one straight portion 20a, 21a is inserted into the inner holding groove 51a formed in the first inner ring portion 51, and the other straight line The parts 20 b and 21 b are inserted into the outer holding groove 52 a formed in the first outer ring part 52. Similarly, the third conductor segment 22 and the fourth conductor segment 23 are overlapped, and one straight portion 22a, 23a is inserted into the inner holding groove 56a formed in the second inner ring portion 56, and the other The straight portions 22 b and 23 b are inserted into the outer holding groove 57 a formed in the second outer ring portion 57.

  After the first to fourth conductor segments 20, 21, 22, and 23 are set on the first twist forming jig 50 and the second twist forming jig 55, respectively, the driving means is driven. Thereby, the 1st outer side ring part 52 and the 2nd outer side ring part 57, and the 1st inner side ring part 51 and the 2nd inner side ring part 56 rotate relatively, respectively. In the present embodiment, the outer ring portions 52 and 57 are rotated in a state where the inner ring portions 51 and 56 are fixed so as not to rotate. As a result, the U-shaped bent portions 20c, 21c, 22c, and 23c provided in the first to fourth conductor segments 20, 21, 22, and 23 are simultaneously twisted. The twisted conductor segments are shown in FIG. 6 in a state where the first and second conductor segments 20 and 21 shown in FIG. 4 are twisted.

  After the twisting of the U-shaped bent portions 20c, 21c, 22c, and 23c is completed, the first twist forming jig 50 and the second twist forming jig 55 are pushed down, and the first twist forming jig 50 and The first to fourth conductor segment groups were extracted from the second twist forming jig 55, respectively.

  Subsequently, the chuck device 1 is pushed down, and the first to fourth conductor segment groups are taken into the annular space secured in the guide jig. At this time, the chuck claws 101 and 111 are in the retracted position, and the tips of the chuck claws 101 and 111 do not interfere with the third to fourth conductor segment groups.

  When the first to fourth conductor segment groups are held at predetermined positions of the chuck device 1, the chuck device 1 is driven. Hereinafter, the operation of the chuck device 1 will be described by the operation of the chuck unit 10. The operation of the chuck unit 11 is omitted because it is the same operation as the chuck unit 10.

  First, the driving means 35 is driven to rotate the plate 30. By rotating the plate 30, the chuck pawl 101 is moved inward in the radial direction by a predetermined amount via the cam mechanism. By the movement of the chuck claw 101, the width of the holding space 104 defined by the chuck claw 101 is reduced, and the straight portions 20a, 20b, 21a, 21b, 22a, 22b, 23a of the first to fourth conductor segment groups are reduced. , 23 b are arranged in the radial direction along the holding space 104. When the chuck claw 101 further moves, the pressing member 102 moves inward in the radial direction from the retracted position via the coil spring 103. By moving the pressing member 102, the straight portions 20a, 20b, 21a, 21b, 22a, 22b, 23a, 23b of the first to fourth conductor segment groups are pressed against the core metal fitting 100 by the pressing member 102, Close contact in the radial direction (state shown in FIG. 7). FIG. 7 is a diagram showing an outline of the arrangement of the conductor segments 20, 21, 22, and 23. The straight portions indicated by a and b after the reference numerals in the drawing are different in the radial direction. It is a straight part of a conductor segment.

  Thereby, the linear part of the conductor segment 2 was able to be chucked.

  Thereafter, while holding the first to fourth conductor segment groups, the chuck device 1 is moved and placed above the iron core holder holding the stator iron core of the rotating electrical machine. Thereafter, the first to fourth conductor segment groups are extruded and inserted into slots provided in the stator core. As a result, eight conductor segments 2 can be inserted in the depth direction in the same slot.

(Modified form of operation of chuck device)
In the present embodiment, in the chuck device 1, the two chuck units 10 and 11 perform the same operation at the same timing, but the two chuck units 10 and 11 may perform different operations.

  First, when the first to fourth conductor segment groups are pulled out from the first twist forming jig 50 and the second twist forming jig 55, the first to fourth conductor segment groups are twisted into the twist forming jig 50. , 55 is not completely taken out, but is taken to a position where the lower end portions of the first to fourth conductor segment groups are left, and the conductor segment group can be chucked only by the chuck portion 11.

  And the 1st-4th conductor segment group hold | maintains in the predetermined position of the chuck apparatus 1 like said method.

  Thereafter, only the chuck portion 11 is operated and chucked by the above method. Thereby, the upper side of the straight portion of the conductor segment 2 is aligned in the radial direction along the holding space 104.

  Subsequently, the conductor segment group is completely extracted, and the conductor segment group is chucked by the chuck portion 10. Accordingly, the lower side of the straight portion of the conductor segment 2 is aligned in the radial direction along the holding space 104. This is effective for chucking the chuck claw 101 without causing the linear portion of the segment 2 to be deformed by interference. Next, the chuck portions 10 and 11 are further operated simultaneously to bring the entire straight portion of the segment 2 into close contact.

  This modification is particularly effective when the length of the straight portion of the conductor segment 2 is long. Specifically, if the length of the straight portion of the conductor segment 2 is long, the position of the straight portion is likely to be displaced. If chucking is performed in a state where the position of the straight line portion is deviated, compression is performed in a state where the position is deviated, making it difficult to insert the stator core into the slot.

It is the figure which showed the chuck device of the Example. It is the figure which showed operation | movement of the chuck nail | claw of the chuck apparatus of an Example. It is the figure which showed the cam mechanism of the chuck | zipper apparatus of an Example. It is the figure which showed the conductor segment. It is the figure which showed the structure of each ring part of a twist forming apparatus. It is the figure which showed the conductor segment after twist forming. It is the figure which showed operation | movement of the chuck nail | claw of the chuck apparatus of an Example.

Explanation of symbols

1: Chuck device 10, 11: Chuck part 100, 110: Core metal fitting 101, 111: Chuck claw 102, 112: Press member 103, 113: Coil spring 2: Conductor segment 30, 31: Plate 35: Driving means 40: Lever 5: Twist forming device 50: First twist forming jig 51: First inner ring portion 52: First outer ring portion 55: Second twist forming jig 56: Second inner ring portion 57: First 2 outer ring part

Claims (5)

A cored bar portion having an outer peripheral surface coinciding with the inner peripheral surface of the coil when the coil is formed;
A plurality of chuck claws provided on the outer periphery of the core metal part in a state capable of shifting in the radial direction of the core metal part;
A pressing member provided on the chuck claw so as to be capable of shifting in a radial direction between two chuck claws adjacent in the circumferential direction;
A linear portion of a U-shaped conductor segment that is fitted into and inserted into a slot of a stator core in a holding space defined by the chuck pawl and the core metal portion and the two chuck claws. Is inserted in a state where a plurality of layers are laminated in the radial direction of the cored bar in a state where the conductor segments overlap with each other, and the pressing member is shifted radially inward to thereby form the linear portion of the conductor segment. A chuck device characterized by compressing in a radial direction. The chuck claw has a guide groove extending in a radial direction,
The pressing member has a guide protrusion that is inserted into the guide groove in a reciprocable manner,
The chuck device according to claim 1, wherein the guide groove further includes an elastic member that urges the guide protrusion radially inward.   The chuck device according to claim 1, further comprising a drive unit that shifts the chuck claw and the pressing member in a radial direction.   The chuck device according to claim 1, wherein the chuck claw and the pressing member have a plurality of stages in the axial direction of the cored bar.   The chuck device according to claim 1, wherein the chuck device is located at an upper portion of a twist forming device that twists the conductor segment.

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