WO1999040667A1

WO1999040667A1 - Rotating machine, method of manufacturing it, and inserter used for it

Info

Publication number: WO1999040667A1
Application number: PCT/JP1999/000453
Authority: WO
Inventors: Takashi Ishigami; Toshihiko Sakai; Yukinori Taneda
Original assignee: Hitachi, Ltd.
Priority date: 1998-02-03
Filing date: 1999-02-03
Publication date: 1999-08-12
Also published as: JP2002125340A

Abstract

A rotating machine, a method of manufacturing it, and an inserter used for it, capable of reducing the use amount of electric wire by eliminating damages to both coil ends and to the insulating coating of the electric wire due to bending and interference between coils at the time of insertion of the coils in the next phase, wherein a coil (100) with a peripheral length varied is used; when the coil (100) is inserted into the slot of a stator, the coil (100) is pushed up by a first push-up mechanism (310) with a portion of it forming a coil end (140) inclined in the direction of a center axis (301); and, after the coil end (140) is projected to one end surface side of the stator, the coil (100) is pushed up by a second push-up mechanism (320) with the coil end (140) inclined in the direction apart from the center axis (301); whereby the coil (100) is inserted while the attitude of the coil end (140) is rotated about the open end of a blade (330) so as to release the electric wire at both coil ends (140), without bending, to the outer periphery side of the slot in the stator.

Description

Rotating machine, its manufacturing method and it

Insata used

Technical field

The present invention relates to a rotating machine in which a coil wound with an electric wire is inserted into a stator of a rotating machine with a slot, a method of manufacturing the same, a description thereof, and a coil inserter used therefor. Background art

Conventionally, as shown in FIG. 2, a stator 200 of a rotary motor such as a DC motor is formed by a slot (groove) of a laminated iron core 201 on which thin pieces of iron such as silicon steel sheets are stacked. It has a structure in which a plurality of coils 160, in which electric wires such as copper wires are wound, are incorporated in 210. For example, a coil is mounted on such a stator 200 as shown in FIG. 2 (FIG. 2 shows a state in which two coils 160 are inserted). This type of coil is provided in a slot (groove) 210 provided from the inner wall 221 side of the hollow portion 200 of the stator 200 toward the outer periphery, and a stator 200 A part of the winding of the coil is mounted from the hollow part 220 side of the coil.

The method of incorporating the coil 160 into the slot 210 is to form a coil by directly winding an electric wire on the slot, or to open the slot with multiple coils with the wire wound in advance. Although there are two ways to insert through the mouth, the direct winding to the slot is not frequently used because of the complicated equipment and time required. When inserting a coil with pre-wound wires through the slot opening, as shown in Figs. 3 and 4, the coil 16 Inserting the insertion parts 16 1 and 16 1 into the slot 2 13 of the stator 200 opened into the inner peripheral side of the stator 200 (see Fig. 3). Insert the coil 160 from the slot 2 1 3 opening to the side 2 3 1 or 2 3 2 There is a method of gradually filling the wires along the direction of the center axis 202 of the stator 200 (see FIG. 4). Here, the stator 200 in FIG. 4 is represented by a cross-section in which the cylinder of the stator 200 is vertically divided through the center of the slot 210 and the center axis 202 of the stator 200. ing. In the former case, the insertion part 161 of the slot 210 of the coil 160 must be aligned in a straight line, so that it is mainly a thick rigid wire (diameter 1.2 mm to diameter 3 mm). (approximately mm). On the other hand, in the latter, the coil 160 is slipped through the slot 210 between the end faces 231 and 232 of the stator 200, so that the wire is required to have flexibility. Fine wires with a diameter of 1.2 mm or less are mainly used.

Japanese Patent Application Laid-Open Nos. Sho 56-115, 161 and Sho 63-3-5 show a method of inserting an electric wire in the axial direction of the stator through the slot opening on the end face of the stator. A method using an inserter, such as that disclosed in Japanese Patent Publication No. 9751/1999, is more widely used than before. Fig. 1 shows the call insert method disclosed in Japanese Patent Application Laid-Open No. 63-59751. Figures 5 and 6 show different methods.

In the method shown in Fig. 1 (page method), one coil 170 is divided into several blocks 170a to 170d with different circumferential lengths. The different blocks 170a to 170d are inserted into separate slots (see Figs. 1 (a) and (b)). In this method, wires with different circumferences do not coexist in the same slot. However, in this method, one block of the coil that has entered the same slot has the crossover portion 174 e of the coil end 174 on the exit side of the coil insertion immediately after the insertion, and the stator 204 It is substantially perpendicular to the end face 2 31 of the stator 200 and is disposed closer to the center 220 c of the stator 200 than the inner wall 2 21 of the stator 200. For this reason, even if the tool 180 shown in Fig. 1 (d) is used, only the entire coil end of one block of the coil inserted in the same slot moves. Therefore, the part with the short circumference in the coil is on the inner circumferential side of the stator in the slot, the side near the stator end face at the crossover of the coil end, and the part with the long circumference is in the slot. It is located on the outer circumference of the stator and farther from the end face of the transition of the coil end, and as shown in Fig. 12, it is bent into valley and valley folds at the coil ends at both ends of the coil by intermediate molding as shown in Fig. 12. Without machining, the coil end cannot escape to the outer periphery of the slot (Fig. 1

(See (d)).

FIG. 5 is a perspective view of the coil inserter, and FIG. 6 is a view in which the stator is set on the coil inserter and the end face of the stator is viewed from the coil insertion / exit side. The coil inserter 900 shown in these figures has a blade 930 made of a plurality of rod-shaped members, and a wire push-up mechanism called a stripper having a groove for accommodating the blade 930 on the outer periphery. 1 0. The blade 9390 includes four sets of a plurality of rod-shaped members 931a, 931b and 931c, 93Id, and has a role of holding the coil when the coil is inserted. Each rod-shaped member 931 a, 93 lb and 931 c, 931 d of the blade 9300 are arranged on the same circumference so that the outer periphery thereof is in contact with the inner wall 2 21 of the motor stator 200. And a stripper (push-up mechanism) 910 inside. The longitudinal direction of the blade 930 and the direction of the central axis 901 of the stripper 910 coincide with each other, and in this direction, each of the blade 930 and the strip 930 can be used independently. The hopper 910 can be moved in an integrated state.

Fig. 7 to Fig. 10 show the procedure of coil insertion using a conventional inserter. First, the stripper 910 was positioned on the root side of the blade 930. W 7

In this state, one side 16 4 of the wound coil 16 0 is connected between the rod-shaped members 9 31 a and 9 31 b, and the other side 16 6 is connected between the rod-shaped members 9 31 c and 9 31 d. Insert in between. Two between the rod-like member 9 3 1 a and 9 3 1 b to揷入the coil 1 6 0, and the Giyappu between the rod-like member 9 3 1 c and ^{9 3} 1 d, the wire is to Yokonami beauty The dimensions do not fit. For this reason, the electric wires in the coils 16 4 and 16 6 inserted between the rod members 931 a and 931 b and between the rod members 931 c and 931 d Are aligned in a line along blade 930 (see Figure 7).

Similarly, the other coils 16 0, 16 0, 16 0 to be inserted at the same time are inserted between the corresponding rod members 9 31 a and 9 31 b, and the rod members 9 3 1 c And between 9 3 1 d. Align the inner wall 221 of the stator 200 with the outer circumference where the blades 930 are lined up, and place the stator 200 from above so that the blade 930 is inserted into the hollow part 220. Externally fit (see Fig. 8).

At this time, as shown in FIG. 6, the stator 200 is positioned so that the slot 210 of the stator 200 is located in the middle of the gap formed by the blade 930. The relative position of the stator 200 with respect to the inserter 900 in the direction of the center axis 91 of the stripper 910 is determined by a stopper (not shown in the drawing). Is fixed to the open end side of the blade 930 by the holding mechanisms 990a and 990b (see Fig. 9). ).

Thereafter, FIGS. 10 (a) to (c) (in these figures, the inserter 900 and the stator 200 are connected to the center axis 90 As shown in the figure, the blade 930 and the stringer, ° 910 (or the stringer, 910 only) are connected to the When it is moved along the center axis 901 through the hollow portion 220 of the first coil 200, a plurality of coils 1 6 0 pushes up And the coil 160 is inserted through the open ports of the plurality of slots 210 of the end face 232 of the stator 200 (FIGS. 10 (a) and 10 (b)). See). When all the wires of the coil end 16 2 on the stripper 9 10 come out above the top surface 2 3 1 of the stator 200, the blade 9 30 and the strip No ,. Lower the 910 (or the stripper 910 only) and complete the phase 1 coil insertion (see Fig. 10 (c)).

In this way, in the conventional inserter, the coil end 162 on the street, ° 910 is constrained by the blade 930, and the electric wires are aligned along the blade 930. Insertion is performed in the inserted state (see FIG. 10 (b)).

FIG. 15 shows a perspective view of a coil 162 formed on the outlet side end surface 231 of the stator 200 coil insertion immediately after the insertion. The wire inserted into the stator inner peripheral side 2 1 2 of slot 2 10 is the side near the stator end face 2 3 1 at the crossover of coil end 16 2 1 6 2 b, slot 2 1 The wire inserted into the outer circumference of the stator 0 2 forms the cross section of the coil 16 2, the side 16 2 a far from the stator end face 2 3 1, and the wire inserted into the cross section of the coil 16 2 The electric wire is substantially perpendicular to the end face 2 31 of the stator 200 and is arranged closer to the center 220 c of the stator 200 than the inner wall 2 21 of the stator 200.

Here, in the coil insertion using the conventional inserter, since the coils with the same circumference are used, the distance from the stator end face 2 31 to the wire of the coil end 16 2 increases on one stator end face. Decreases at the other end face. For this reason, the shape of the coil end 16 2 formed on the inlet side end surface 2 32 of the coil insertion is different from that of the coil end 16 2 formed on the outlet side end surface 2 31 of the coil insertion. Results.

FIG. 16 shows a perspective view of a coil 168 formed on the inlet-side end surface 232 of the coil insertion immediately after the insertion. Slot 2 10 stator inner circumference The wire inserted into the stator end of the cross-over part of the coil end 168 from the stator end face 2 3 2, and the wire inserted into the stator outer peripheral side 2 of the slot 210 Forms a side 168 b near the end face 2 32 of the transition section of the coil end 168, and the wire at the transition section of the coil 168 is almost perpendicular to the end face 2 3 2 of the stator And is arranged on the outer peripheral side of the stator 200 with respect to the inner wall 222 of the stator 200. After this, the coil of the second phase or later is inserted into one of the other empty slots 210, which is already between slot 210 where coil 160 is inserted. I do. At this time, the coil end immediately after the insertion (particularly, the coil end 16 2 formed on the stator end face 23 1 at the inlet exit side) is formed by a plurality of empty slots 21 10 on the stator end face 23 1. Exists over the open mouth. Therefore, as shown in Figs. 11 (a) to (c), conical intermediate molding jigs 991 and 992 are pressed against the coil ends 162 and 1668, and the coil ends 1 Deform the wires of 62, 168 and push them to the outer periphery of the empty slot 210.

Fig. 12 shows the coil end shape formed on the stator end face on the exit side of coil insertion after intermediate molding. Fig. 13 shows the coil end shape formed on the stator end face on the entrance side of coil insertion after intermediate molding. 3 shows a coil end shape. As shown in Fig. 11 (a) and Fig. 15, the coil end 162 of the stator end face 2 31 on the exit side of the coil insertion, the blade 9 The wire placed inside the circle and inserted into the stator inner peripheral side 212 of the slot 210, the side near the stator end face 231 near the crossover of the coil end 162, 162b, The electric wire inserted into the outer peripheral side 2 1 1 of the stator forms a side 1 62 a far from the stator end face 2 3 1 of the crossover portion of the coil end 16 2. Therefore, when the transition portion of the coil end 162 is pushed out of the empty slot 210 by the intermediate molding, as shown in FIG. 12, the center of the stator 200 is moved to the coil 1626 as shown in FIG. When viewed from the 220c side, a mountain-bending process 16 2d and a valley-fold bending process 162c are performed, and the slot 210 force is protruded. The wire is twisted on both sides of the coil end (see Fig. 12). On the other hand, the coil end 168 of the stator end face 232 on the entrance side of the coil insertion is located relatively relatively to the stator outer peripheral side of the slot, and the stator of the slot 210 is relatively narrow. The wire inserted into the inner peripheral side 2 1 2 is the coil end 1 6 6 a far from the stator end face 2 3 2 at the transition of the coil end 1 6 6, and the wire inserted into the stator outer peripheral side 2 1 1 is the coil end. A side 1668b is formed near the end face 232 of the transition section 1668 (see Fig. 13). For this reason, even if the cross section of the coil end 168 is released to the outside of the empty slot 210 by the intermediate molding, the arrangement of the electric wire of the coil end 168 is almost maintained, and Such a mountain fold and valley fold bending process is not performed. As described above, in the conventional motor, the coils of the same circumference are inserted by the inserter and formed in the middle, and the shapes of the coil ends at both ends of one coil are different. -The conventional method described above has the following problems.

(1) In the conventional method, the cross section of the coil end formed on the exit side of the coil insertion immediately after the coil is inserted is almost perpendicular to the end face of the stator, and is closer to the center of the stator than the inner wall of the stator. Be placed. For this reason, at the coil end on the stator end face on the exit side of the coil insertion, both sides of the coil coming out of the slot are subjected to mountain-bending bending as viewed from the center side of the stator by intermediate molding. However, since the electric wire is doubled on both sides of the bent part of the mountain fold, the electric wire from the slot opening to the transition of the coil end projects into the space above the empty slot opening. As a result, when inserting the coil of the next phase into the empty slot, interference occurs between the coils, and the insulation coating of the wire is damaged. In addition, if the interference between the coils is too large, the force required for coil insertion (the push-up force of the stripper) becomes insufficient, and the coil insertion itself becomes impossible. For this reason, a large driving source is required for coil insertion, making it difficult to downsize the entire inserter. (2) Immediately after insertion of the coil, the transition of the coil end on the exit side of the coil insertion is substantially perpendicular to the end face of the stator, and is located on the center side of the stator from the inner wall of the stator. Therefore, when the coil end is pushed out of the empty slot opening by the intermediate molding jig and released, the amount of deformation of the electric wire is large. For this reason, the wires in the coil end rub against each other during the intermediate molding, and the insulation coating of the wires is damaged. Also, the insulation of the electric wire is easily damaged even in the bent part of the coil.

(3) The shape of the coil end can be divided into two types: a shape in which the coil ends at both ends of the coil are bent in a mountain fold and a shape in a valley (Fig. 12), and a shape in which they are not bent (Fig. 13). There are two types. As shown in Fig. 14, four types of coils are conceivable depending on the combination of coil end shapes. In the case where both coil ends are not bent (Fig. 13), the use of electric wires is the largest. The amount is small. However, in the conventional insertion of a coil using an inserter, it is essential to perform one of the coil ends with a mountain fold and a valley fold by intermediate molding. Therefore, in order to reduce the material cost of the electric wire, it is required to insert and intermediately form a coil in which both coil ends are not bent (FIG. 13).

A first object of the present invention is to allow both coil ends to escape to the outer periphery of an empty slot opening without performing a bending process of a mountain fold and a valley fold on both sides of the coil. An object of the present invention is to provide a rotating machine capable of eliminating damage to a coating, a manufacturing method thereof, and an inserter.

A second object of the present invention is to reduce the space occupied by the inserted coil in the vicinity of the slot on the end face of the stator on the exit side of the coil insertion, and to reduce the coil when the coil of the next phase is inserted. An object of the present invention is to provide a rotating machine capable of reducing damage to an insulation coating of an electric wire due to interference between the electric machines, a method for manufacturing the same, and an inserter.

Furthermore, a third object of the present invention is to reduce the amount of electric wire used compared to a conventional coil. An object of the present invention is to provide a rotating machine capable of reducing power consumption, a manufacturing method thereof, and an insulator. Disclosure of the invention

First, use a coil that is wound with the perimeter gradually increased or decreased. Second, instead of the conventional single strip bar, it has multiple push-up mechanisms that can constrain the coil end to different positions by the contact surface. Use an inserter that can move in the same direction as the center axis of the robot without interfering with each other, and that can control the relative positions of them. At the end of the coil insertion operation, when forming the coil at the exit side of the coil insertion, the constraint of the coil by the blade is released, and the push-up mechanism that contacts the coil end is replaced to change the posture of the wire forming the coil end. Insert the coil while rotating around the open end of the blade.

By using this method, the short-peripheral portion of the stator at both end faces after intermediate molding is the outer peripheral side of the stator in the slot and the side near the stator end face at the end of the coil end, and the long peripheral portion is the slot. It is located on the inner circumferential side of the stator in the slot and farther from the stator end face at the transition of the coil end.Both coil ends have the outer periphery of the empty slot opening without bending both sides of the coil. You can escape. Furthermore, since there is no bending of the wire rod by the intermediate molding, the insulation coating of the electric wire is not damaged. Also, the space occupied by the inserted coil near the slot opening on the stator end face on the exit side where the coil is inserted is reduced, and damage to the insulation coating of the wire due to interference between the coils when inserting the next phase coil is reduced. Furthermore, since the coil used in the present invention with a changed circumference has a smaller electric wire usage fee than the conventional coil, the material cost of the motor is reduced.

Therefore, in order to achieve the above object, according to one embodiment of the present invention, In a motor configured by mounting a wound coil on a slot of a stator, the coil is wound such that the wire has a longer circumference at one end and a shorter circumference at the other end. A wire having a short circumference and being located on the outer peripheral side of the stator in the slot, and being located on a side closer to the stator end face of a crossover portion of the coil end protruding from the stator end face; and In addition, a motor is provided, in which a long wire is located on the inner circumferential side of the stator in the slot, and is located farther from the stator end face at a crossing portion of the coil end.

According to another aspect of the present invention, a blade supporting a coil and a push-up mechanism that pushes up the coil supported by the blade are provided along a common central axis, and the stator is moved up by the push-up mechanism. In a coil inserter that attaches a coil to the slot,

A first push-up mechanism that pushes up a portion serving as a coil end of the coil in a state of being inclined in the central axis direction, wherein the coil end of the coil projects toward one end surface of the stator; A second push-up mechanism for tilting and pushing up the coil end portion in a direction away from the central axis in a later state; and

When inserting the coil into the slot of the stator, the first push-up mechanism pushes up the coil end portion of the coil in a state of being inclined in the direction of the central axis, After the coil end protrudes toward the one end surface of the stator, the control device controls the second push-up mechanism to tilt and push up the coil end portion of the coil in a direction away from the central axis. Having

There is provided a coil inserter characterized by the following. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 shows an example of a conventional method of mounting a coil on a stator. ) A plan view, (b) a side view, (c) a partial side view showing the state of the coil end on the lower side of the stator, and (d) a partial side view showing the state of processing the coil end on the lower side of the stator. is there. FIG. 2 is a perspective view showing a general motor stator of a rotary motor and a coil end of a coil mounted thereon. FIG. 3 is an explanatory view showing a state where the coil is incorporated into a slot of the stator from a slot opening on the inner peripheral side of the stator. FIG. 4 is an explanatory view showing a state where the coil is inserted into the slot from the slot opening on the end face of the stator.

Fig. 5 is a perspective view showing an example of a conventional inserter, and Fig. 6 is a plan view of the conventional inserter in which a stator is set and the end face of the stator is viewed from the force on the exit side of coil insertion. It is. FIG. 7 is a perspective view showing a state where one coil is inserted between the blades of the conventional inserter. FIG. 8 is a perspective view showing a state where a plurality of coils are inserted between the blades of the conventional inserter. FIG. 4 is a perspective view showing a state of setting from the open end side of the horn.

FIG. 9 is a perspective view showing a state in which the end face of the stator set in the inserter is fixed with a jig, and FIG. 10 is an explanatory view showing a coil insertion operation to the stator by a conventional inserter. FIG. 11 is an explanatory diagram showing a state of the intermediate molding of the coil end.

FIG. 12 is a partial perspective view showing the shape of a coil end formed on a stator end face on the outlet side of insertion as a result of inserting a coil by a conventional inserter and performing intermediate molding.

FIG. 13 is a partial perspective view showing the shape of the coil end formed on the stator end face on the inlet side of the insertion as a result of performing the intermediate molding after inserting the coil with a conventional inserter.

FIG. 14 is a chart showing coil classifications based on combinations of coil end shapes.

Fig. 15 shows the state of the exit side of the insertion immediately after insertion by the conventional inserter. FIG. 4 is a partial perspective view showing a shape of a coil end formed on a data end face. FIG. 16 is a partial perspective view showing the shape of a coil end formed on the end face of the stator on the entrance side of the insertion immediately after insertion by the conventional inserter. FIG. 17 is a perspective view showing an example of a coil inserter used in the present invention. FIG. 18 is a plan view of the coil inserter of the present invention as viewed from the open end side of the blade. FIG. 19 is a block diagram showing a configuration of a drive system and a control system of the coil inserter of the present invention.

FIG. 20 is an explanatory diagram showing a coil insertion operation using the coil inserter of the present invention.

Fig. 21 is a perspective view showing the procedure for mounting the coil on the blade, and Fig. 22 shows the positional relationship between the coil and the first push-up surface when the coil is pushed up by the first push-up member. FIG.

FIG. 23 is a perspective view showing an example of a coil used in the motor of the present invention. FIG. 24 is a sectional view showing an example of the motor stator of the present invention.

FIG. 25 schematically shows a state of mounting a coil to a motor stator of the present invention, wherein (a) is a plan view, (b) is a side view, and (c) is a partial perspective view. FIG. 26 is a plan view showing a structure of a push-up member according to another embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIGS. 17 to 25 are views for explaining a motor, which is one of the rotating machines of the present invention, a method of manufacturing the motor, and an inserter used for the method. FIG. 23 shows an example of the shape of a coil used in the present invention. In the coil 100, the electric wire is wound so that the length of the electric wire along a cross section perpendicular to the coil axis, that is, the circumference is gradually increased along the axial direction of the coil. That is, the bottom surface and the top surface are formed in a rectangular hollow truncated pyramid shape. I Therefore, the coil 100 has a short circumference 1110 at one end 111 side where an electric wire with a short circumference is wound, and a long circumference at the other end 1 212 side. It is composed of a long circumference 120 around which the wire is wound. That is, the coil 100 has a structure in which the circumference of the wound wire is gradually increased from one end 11 1 side to the other end 12 21 side.

The electric wire forming the coil 100 is a single electric wire. However, since the perimeter differs depending on the winding position, in this specification, for convenience of explanation, “the perimeter is Sometimes referred to as "short wires" and "long wires". FIGS. 24 and 25 show a state where the coil 100 is assembled to the stator 200. FIG. The coil 100 is mounted on the slot 210 from the hollow portion 220 of the stator 200 toward the outer periphery. In Fig. 24, the short-peripheral portion 110 of the coil 100 is placed on the outer peripheral side 211 of the stator 200 in the slot 210, and the long-peripheral portion 120 is placed in the slot 210. Attach the coil 100 to the slot 210 so that it is located on the inner circumferential side 212 of the stator 200 in the slot 210. In this state, the coil 100 is provided with the slot mounting portion 130 and the coil ends 140 and 15 projecting from the upper end surface 23 1 and the lower end surface 23 2 of the stator, respectively. It is composed of 0.

At the transition between the coil ends 140 and 150, the short circumferences 14 1 and 15 1 of the coil 100 are located close to the upper end surface 23 1 of the stator. The long portions 14 2 and 15 2 are located far from the upper end surface 2 3 1 of the stator. Therefore, in the coil 100, the transition between the coil ends 140 and 150 is arranged substantially perpendicularly to the upper end surface 231 and the lower end surface 232 of the stator 200.

FIGS. 17 and 18 are examples of an inserter for realizing the insert method of the present invention. FIG. 17 is a perspective view, and FIG. 18 is a view of the inserter viewed from the open end side of the blade. FIG. FIG. 19 is a block diagram showing a control system. In a conventional inserter, the blade ends the coil And the coil was pushed up by one stripper. In the inserter of the present invention, a plurality of push-up mechanisms are provided, and the attitude of the coil end is restricted by the contact surface of the push-up mechanism.

The inserter used in the present embodiment has two push-up mechanisms as shown in FIG. That is, the inserter 300 has a first push-up mechanism 310, a second push-up mechanism 320, and a blade 330, and the driving means 410, 4 for driving these. 20 and 43, and control means 44. The first push-up mechanism 310, the second push-up mechanism 320, and the blade 330 are arranged concentrically with the central axis 301 and do not interfere with each other in the axial movement. It has a structure. That is, the first push-up mechanism 310 has a shape that fits with the second push-up mechanism 320, and the respective push-up mechanism central axes 310 along the blade 330 without interference. It is possible to move in the direction of.

The first push-up mechanism 3 10 comprises a central shaft body 3 1 1, eight push-up members 3 1 2 provided radially therefrom, and a shaft 3 1 for axially displacing the central shaft body 3 1 1. And 3. As shown in FIG. 19, the shaft 313 is driven so as to be displaced in the axial direction by the driving means 410. The push-up member 3 1 2 has a first push-up surface 3 1 2 a which comes into contact with and pushes up the slope 10 1 of the coil 100 (corresponding to a portion which will later become a transition of the coil 140). . In the present embodiment, the push-up member 3 12 has a narrow width in the circumferential direction, and a concave portion 3 14 is provided between the adjacent push-up members 3 12. The number of the push-up members 312 is not limited to the eight pieces described above. A number suitable for the structure of the motor can be set as appropriate. As shown in FIG. 18, the second push-up mechanism 320 has four push-up members 3 2 shaped to fit into the recesses 3 1 4 between the push-up members 3 1 2 of the first push-up mechanism 3 10. 2, a shaft 32 3 supporting the members 3 22, respectively, and a ring member 3 21 supporting the shaft 3 2 3. The ring member 321 is driven by the driving means 420 shown in FIG. 19 so as to be displaced in the axial direction. The push-up member 322 has a second push-up surface 322 a for pushing up the coil 140 in order to change the attitude of the coil 140 of the coil 100.

The radial length of the first push-up surface 3 1 2a from the central axis 301 is at least long enough to support the slope 101 of the coil 100 as shown in Fig. 22. And That is, if the number of windings of the coil is n and the wire diameter is d, the length is n d. The length of the push-up surface in a plane perpendicular to the central axis 301 is given by Id.

The first push-up surface 3 1 2 a has an angle 角度 with respect to the central axis 301. The inclination of the push-up surface 312a is set so that the surface 312a is directed toward the central axis, that is, the normal is inclined inward with respect to the central axis 301. This makes it possible to work without disturbing the winding state of the coil when the coil 100 is pulled up along the blade 130 and mounted on the slot 210. Also, the second push-up surface 3 2 2a has an inclination of angle 3] with respect to the central axis 301 so that the surface 3 22 a faces outward with respect to the central axis 301. ing. The inclination of the push-up surface 3 2 2 a is set so that its normal line is inclined outward with respect to the central axis 301. Thus, the posture in which the transition portion of the coil end 140 projects toward the central axis can be changed to a direction away from the central axis. This procedure will be described later.

The angles する and 1 a of the first push-up mechanism 3 1 0 with respect to the center axis 3 1 2 of the first push-up surface 3 1 2a and the second push-up mechanism 3 2 0 with respect to the center axis 3 1 2 of the second push-up mechanism 3 2 0 Is determined. That is, as shown in Fig. 22, d: wire diameter (mm)

n: Number of turns

1 d: Distance occupied by the wire contact part on the first push-up surface in the radial direction (mm), the angle Θ is

0 <θ ≤ sin— ¹ (1 d / n

Take a range. For example, if the number of windings is n = 50, the wire diameter d = 0.7 (mm), and 1 d = 23 (mm), the angle Θ will be a maximum of 41 °. The angle; 3 is about 120 ° to 150 °. Therefore, the posture of the coil end wire differs depending on which surface is in contact.

As described above, the first push-up mechanism 310 and the second push-up mechanism 320 have a structure that does not interfere with each other. In addition, it has driving means 410 and 420 which are driven independently of each other.

As shown in FIGS. 17 and 18, the blade 330 has two push-up members 3 12 corresponding to the two slots to which the coil 110 is to be mounted. One set of rod-shaped members 3311a, 3311b and 3311c, 3311d is equipped with four sets to which one coil 100 is mounted. In the present embodiment, since eight push-up members 312 are arranged, four sets of two rod-shaped members are arranged. The blades 330 are arranged on the same circumference centered on the central axis 301 of all the rod-like members 331a, 3311b and 3311c, 3331d. The first push-up member 3 1 2 and the second push-up member 3 2 2 are arranged inside. Then, along the outer periphery of the rod-shaped members 331a, 3311b and 3311c, 3311d, the stator 2 is positioned so that the inner peripheral wall of the hollow portion 220 is located outside thereof. The blade 330 is passed through the hollow portion 220 of the cylinder 00 (see FIGS. 20 and 22). Further, as shown in FIG. 19, the blade 330 has a driving means 430.

As described above, the first push-up mechanism 310, the second push-up mechanism 320, and the blade 330 in the present embodiment are, as described above, driving means 4110, 4200 and FIG. 4 3 0 is provided. These drive means 410, 420 and 430 each independently operate their respective mechanisms. Can be driven. However, these mechanisms need to cooperate according to a certain procedure. Therefore, a control device 440 for controlling the entire operation is provided. The control device 440 controls each of the driving means 410, 420 and 430 according to a predetermined program. The driving means 410, 420 and 430 are composed of, for example, a motor and a ball screw functioning as a means for transmitting the movement to a target mechanism. The control device 440 is composed of, for example, a computer, and is connected to each of the driving means 410, 420 and 430 via a bus or the like.

Next, a procedure for mounting the coil to the stator in the present embodiment will be described. FIGS. 20 (a) to (g) show a series of procedures for mounting the coil on the stator.

Fig. 21 (a) and (b) show the procedure for preparing the coil side. In these figures, the first push-up mechanism 310, the second push-up mechanism 320, the stator 200, and the coil end 140 are each a cross section passing through the central axis 301. It represents.

First, the first push-up mechanism 310 and the second push-up mechanism 320 are made to stand by at the root side of the blade 330, and the second push-up member 322 of the second push-up mechanism 320 is pushed up second. The surface 3 2 2 a is positioned vertically below the first push-up surface 3 1 2 a of the first push-up member 3 1 2 of the first push-up mechanism 3 10, and is located above the first push-up surface 3 1 2 a. The wire on the slope 101 of the coil 100, which becomes the coil end 140, is placed at the bottom. By the way, the coil 100 is wound around a bobbin 109 shown in FIG. 21 (a). Therefore, in order not to disturb the alignment state of the coil 100, the fixing jig 1002 which keeps the alignment of the electric wire in the slope 1001, which is to be the coilend 140, and the portion 130 to be inserted into the slot, is intended. Remove from the bobbin 109 while holding it in place (see Fig. 21 (a)), and remove the rod-shaped members 3311a, 3311b and 3311c, 311 constituting the blade 330. 3 1d (see Fig. 17 and Fig. 18) between corresponding members Set the coil in the gap in order starting from the shortest part of the coil circumference (see Fig. 21 (b)).

As a result, the part inserted first into the gap of the blade 330 is closer to the center axis 301 of the first push-up surface 312a, and the part inserted later is closer to the blade 330. The wire with the coil end 140 is placed at an angle Θ (0 <Θ ≤ sin— ¹ (1d / n · d)) with respect to the central axis 301 (Fig. 20). (See a)).

Next, after setting the stator 200 from the open end side of the blade 330 (see FIG. 20 (b)), the mutual movement of the first push-up mechanism 310 and the second push-up mechanism 320 is started. Without changing the relative position, the blade 330 and the first push-up mechanism 310 and the second push-up mechanism 320 (or the first push-up mechanism 310 and the second push-up mechanism) Move the mechanism 320 only) to the open end 330 a of the blade (see Fig. 20 (c)). At this time, the electric wire of the coil end 140 keeps a posture inclined at an angle に対して with respect to the central axis 301, and the coil 100 gradually moves into the slot of the stator 200. Enter Then, when the tip of the coil 140 appears from the end face 23 1 of the stator 200, the movement is stopped, and only the blade 330 is moved to the stator 200 by the tip 330 of the blade 330. (See Fig. 20 (d)).

Next, in a state where the first push-up mechanism 310 and the blade 330 are stopped, only the second push-up mechanism 320 is moved to the open end 330a side of the blade 330. As the second push-up mechanism 3 2 0 moves away from the stator end face 2 3 1 on the exit side of the insertion with respect to the first push-up mechanism 3 1 0, the first push-up face of the 1st push-up mechanism 3 10 The coil end 140, whose posture was restricted by the 3 1 2 a, gradually moved onto the second push-up surface 3 2 2 a of the second push-up mechanism 320, and the electric wire of the coil end 140, The posture is inclined at an angle β (1 20; ≤ | 3 1 150 °) with respect to the central axis 301. (See Fig. 20 (e)). Therefore, by exchanging the push-up mechanism with which the coil end 140 comes into contact from the push-up mechanism 310 to the second push-up mechanism 320, the posture of the electric wire forming the coil end 140 becomes The blade 330 rotates around the open end of the blade 330.

Further, when the second push-up mechanism 320 is moved to a position (upward) away from the stator end face 231 on the insertion exit side, the wire of the coil 140 on the inlet exit side is moved by the second push-up mechanism. The second push-up surface of 3200 departs from the force of 322a and forms a plane almost perpendicular to the end surface 231 of stator 200 on the top of blade 330 (see Fig. 20 (f)). ). Next, the blade 330, the first pusher 310 and the second pusher 320 are moved to the root side of the blade 330 (see FIG. 20 (g)).

According to the motor manufacturing method of the present invention using such an insert method, the position of the coil end is restricted by the contact surface of the push-up mechanism, and the push-up mechanism is switched when the coil end on the entrance exit side is formed. Change the attitude of the coil end. Also, the open end of the blade is retracted to the vicinity of the stator end face on the exit side of the insertion, and the coil end on the insertion exit side is released from the outer periphery of the stator by releasing the restriction of the coil end by the blade. Can be inserted and placed in In this regard, the position of the coil end on the exit side of the insertion is constrained by the blade 330, which is clearly different from the conventional inserter method in which the position is the same from the beginning to the end of the insertion. FIG. 25 shows the shape of the coil end immediately after the coil is mounted on the stator in the manufacturing method of the present invention. (A) is a plan view, (b) is a side view, and (c) is a perspective view showing a part of the upper surface. In the present invention, the coil end 140 having the shape shown in FIG. 25 (c) can be further processed. That is, as described in the prior art, a conical intermediate molding jig is pressed against both coil ends, or a coaxial molding jig is used from the center of the stator to the outer periphery using a cylinder or the like. It is possible to push and extend the coil end 140 to push the coil end 140 to the outer peripheral position of the empty slot 210.

In this embodiment, according to the above-described method, in the coil on the stator end face on the inlet exit side, the short peripheral portion is closer to the stator outer peripheral side in the slot and the stator end face on the transition part of the coil end. In addition, a portion having a long circumferential length is disposed on the stator circumferential side in the slot and on a side of the crossing portion of the coil end far from the stator end face. In addition, since the circumference of the coil is changed to have the shape shown in Fig. 23, the coil end on the stator end face on the inlet side of the insertion also has the same shape. The state of insertion of the coil into the stator shown in FIG. 24 is realized. The shapes of both coil ends before the intermediate molding are as shown in Fig. 25 (c) on the outlet side of the insertion and Fig. 13 on the inlet side. Therefore, in the present embodiment, unlike the conventional coil, the coil end is allowed to escape to the outer peripheral side of the slot without performing the peak and valley fold bending on both sides of the coil end by intermediate molding. Can be. Therefore, after the intermediate molding, both coil ends have the shape shown in Fig. 25 (c). As a result, the space occupied by the coil near the slot opening on the end face of the stator can be reduced, so that interference between the coils when the next coil is inserted is reduced, and damage to the insulation coating of the wire due to the interference is reduced and reduced.コイル Coil can be inserted by input.

Next, another embodiment of the present invention will be described with reference to FIG. The embodiment shown in FIG. 26 is an example in which the number of lifting mechanisms is larger than that of the above-described embodiment.

As shown in FIG. 26, in addition to the first push-up mechanism 310 and the second push-up mechanism 320, a third push-up mechanism 340 and a fourth push-up mechanism 350 are provided. The third push-up mechanism 340 and the fourth push-up mechanism 350 are the third push-up mechanism of the third push-up mechanism in the recess provided in the second push-up member 322 of the second push-up mechanism 322. Fit Furthermore, it is configured by fitting the fourth push-up member 352 into a concave portion provided in the third push-up member 342. These first to fourth push-up members 310 to 350 have a coaxial structure and are arranged together with the blade 330 so that the movements in the central axis direction do not interfere with each other. . Further, the third push-up mechanism 340 and the fourth push-up mechanism 350 are provided with drive means similar to the drive means 410, 420 shown in FIG. 19, that is, each of them is, for example, a ball screw. And a linear drive means such as a motor. These driving means are controlled by the driving device 440.

According to each embodiment of the present invention described above, the following effects can be obtained.

(1) Both coil ends can be released to the outer periphery of the empty slot opening without bending both sides of the coil into mountain valleys and valley folds. There is no double overlap near the empty slot opening adjacent to the slot. Therefore, the space occupied by the wire of the coil end inserted near the slot opening on both ends of the stator is reduced, and interference between the coils when inserting the coil of the next phase into the empty slot is reduced, and the insulation of the wire is reduced. No damage is caused. In addition, since the force required for inserting the coil (the push-up force of the stripper) is small, the drive source such as a motor and the entire coil detector can be reduced in size.

(2) Immediately after the insertion, the coil end on the stator end face on the exit side of the coil insertion is located closer to the outer periphery of the stator than in the past (conventionally, inside the blade). The side with the long circumference near the first end face is located farther from the stator end face at the cross section of the coil end. For this reason, the shape of the coil end is close to the final shape (Fig. 13), and the amount of deformation of the coil end due to intermediate molding is small. Therefore, damage to the insulation coating of the wires due to bending deformation and slippage between the wires is reduced. (3) By using a coil whose perimeter is sequentially increased or decreased, both coil ends do not have bending deformations of mountain folds and valley folds on both sides of the coil. The outer peripheral side of the stator in the slot and the side near the stator end face of the transition part of the coil end, and the long circumference part are far from the inner peripheral side of the stator in the slot and the stator end face of the transition part of the coil end. The coil end shape on the side can be realized. This coil uses less wire than conventional coils, because either coil end has no bent folds or valley folds. Industrial applicability

According to the present invention, both coil ends can be released to the outer periphery of the empty slot opening without performing the bending process of the mountain fold and the valley fold on both sides of the coil. Damage can be eliminated. In addition, the space occupied by the inserted coil near the slot at the stator end face on the exit side of the coil insertion can be reduced, and the insulation coating of the wire due to interference between the coils when the next phase coil is inserted can be reduced. Damage can be reduced. Furthermore, the amount of electric wire used can be reduced as compared with a conventional coil.

Claims

The scope of the claims

1. Insert a coil in which the winding circumference is sequentially increased or decreased into a slot, and the inserted coil,

The short portion of the winding circumference is located on the outer peripheral side of the slot and forms a portion close to the stator end face across the coil end,

A long part of the winding circumference is located on the inner peripheral side of the slot, and forms a part far from the end face of the stator across the coil end;

A rotating machine, wherein a transition of the coil end is provided on an outer peripheral side of the slot.

2. Insert the coil whose winding circumference is sequentially increased or decreased into the slot, and insert the coil,

The short part of the winding circumference is located on the outer peripheral side of the slot, and forms a part near the stator end face across the coil end,

A long part of the winding circumference is located on the inner peripheral side of the slot, and forms a part far from the stator end face across the coil end;

A rotating machine characterized in that the ridge line of the coil end does not intersect with the electric wire forming the ridge line.

3. Insert the coil whose winding circumference is sequentially increased or decreased into the slot, and the inserted coil,

The short portion of the winding circumference is located on the outer peripheral side of the slot, and forms a portion close to the stator end face of the transition between the coil and the coil.

A long part of the winding circumference is located on the inner peripheral side of the slot, and forms a part far from a stator end face across the coil end;

The Koiruen provided feed de on the outer peripheral side of the slot, the rotating machine, characterized in that it has substantially the same shape of Koiruendo of the stay data across ₍

4. Equipped with a blade and a push-up mechanism, a coil inserter that inserts a coil in the axial direction of the stator from the slot opening on the end face of the rotating machine stator A plurality of push-up mechanisms, each having a contact surface for restraining an electric wire forming a coil end to a different posture, and independently moving the plurality of push-up mechanisms and the blade in the axial direction of the stator. A coil inserter comprising: a plurality of driving means; and a plurality of push-up mechanisms with respect to the stator and control means for controlling a relative position of the blade during insertion of the coil.

5. When forming the coil end on the exit side of the lifting mechanism with respect to the stator, move the open end of the blade to near the end face of the stator,

A method of manufacturing a rotating machine in which a push-up mechanism is replaced and a coil is inserted by changing a contact surface of the coil end.

6. In a rotary machine constructed by mounting coils wound in advance on slots of the stator,

The coil is formed by winding an electric wire such that the circumferential length at one end is longer and the circumferential length at the other end is shorter, and the wire having the shorter circumference is located on the outer circumferential side of the stator in the slot. And a wire having a long circumference is located on the side closer to the stator end face of the crossover portion of the coil end protruding from the stator end face, and is located on the inner circumferential side of the stator in the slot. Located farther from the end face of the stator at the end of the coil end

A rotating machine.

7. A blade that supports the coil and a push-up mechanism that pushes up the coil supported by the blade are provided along a common central axis, and the coil is mounted on the stator slot by the push-up mechanism. The coil inserter

A first push-up mechanism that pushes up a portion serving as a coil end of the coil in a state of being inclined in the direction of the central axis, wherein the coil end of the coil projects to one end surface side of the stator; In this state, the coil end portion is moved away from the central axis. A second push-up mechanism, which tilts and pushes up, and when the coil is inserted into a slot of the stator, the first push-up mechanism causes the coil end portion of the coil to become After the coil end of the coil protrudes toward the one end surface side of the stator, the portion to be the coil end of the coil is moved to the center by the second push-up mechanism. Having a control device that controls to push up by tilting away from the axis

A coil inserter characterized by the following.