Armature for an electric rotary machine, insulator for it, and coil winding device

Abstract

An armature (100) for an electric rotary machine, having an even number of teeth (11) provided with insulators (2a, 2b) for electrical insulation, arranged in a ring shape, and having a coil (3a) obtained by winding a conductive wire (4) forward, i.e., clockwise with respect to an axis of rotation, from an outer circumferential side of each tooth (11), in a concentrated manner, and a coil (3b) obtained by winding a conductive wire (4) alternately onto each tooth (11) in a concentrated manner backward, i.e., counterclockwise with respect to the axis of rotation, from the outer circumferential side of each tooth (11), wherein In each of all forward-wound coils (3a) and backward-wound coils (3b), a straight section (S) is formed in which the conductive wires (4) in respective layers of the coil are parallel, on a portion wound onto a first side surface (21a, 21b) of two side surfaces of each tooth (11) covering insulator (2a, 2b) opposite the respective adjacent tooth, wherein the first side surface (21a, 21b) is a right-hand side surface facing the axis of rotation from the outer circumferential side of each tooth (11), and a crossing section (C) in which the conductive wire (4) in an upper layer is wound in a crossed manner onto the conductive wire (4) in an adjacent lower layer on a portion wound onto a second side surface (22a, 22b) of the two side surfaces, wherein the second side surface (22a, 22b) is a left-hand side surface facing the axis of rotation is formed from the outer circumferential side of each tooth (11), and a clockwise winding insulator (2a), arranged as an insulator of each tooth (11) of which the coil (3a) wound forward thereon has a transverse guide (25a) to wind the first winding turn of the conductive wire (4) to be wound onto the second side surface (22a) obliquely with respect to an axis of the armature (100) and along an inner flange (23a) of the clockwise winding insulator (2a), wherein the transverse guide (25a) is arranged along an end section where the first winding turn on the second side surface (22a) terminates, and a counterclockwise winding insulator (2b), arranged as an insulator of each tooth (11) whose reverse-wound coil (3b) has a transverse guide (25b) to wind the first winding turn of the conductive wire (4) to be wound onto the second side surface (22b) obliquely with respect to the axis of the armature (100) and along an inner flange (23b) of the counterclockwise winding insulator (2b), wherein the transverse guide (25b) is arranged axially opposite the transverse guide (25a) of the clockwise winding insulator (2a) and along the end section where the first winding turn on the second side surface (22b) terminates.

Description

TECHNICAL AREA

[0001] The present invention relates to an armature for an electric rotary machine, an insulator for it, and a coil winding device. STATE OF THE ART

[0002] Traditionally, a coil design for an electric rotary machine has been proposed in which a section in which a coil in a lower layer and a coil in an upper layer, adjacent to each other, are wound in a crossed manner, are located on side surfaces of each tooth opposite the adjacent teeth.

[0003] In this design, a coil with a feed of ½ division of the wire diameter is wound on such side surfaces opposite the adjacent teeth, thereby forming a crossing section.

[0004] Thus, crossing sections are located on two side faces of each tooth, opposite the side faces of the adjacent teeth, so that the coil shape becomes an essentially symmetrical shape, resulting in a coil that is excellent in terms of assembly machinability, external appearance and high-speed winding (e.g. patent specification 1).

[0005] However, the space factor is small because conductive wires overlap at the crossing section of coils.

[0006] Taking into account the foregoing, a coil design for an armature is proposed in which coil crossing sections are collectively located on a surface on one side in the circumferential direction of each tooth and a coil is wound in a regularly oriented manner on a side surface on the other side in the circumferential direction of each tooth opposite said tooth, as shown in patent specification 2.

[0007] In patent specification 2, a coil is wound sequentially in a spiral shape such that it is fed from one end to the other in the radial direction of each tooth and then back from the other end to the first end, and such a winding is repeated, whereby crossing sections are collectively located on a side surface of each tooth. Thus, a surface on which a conductive wire of a coil is regularly aligned and a surface on which the stacking height is higher due to the presence of crossing sections are arranged in pairs between the adjacent teeth, whereby the teeth mutually compensate for the space and high-density coils are formed.

[0008] In patent specification 3, a coil body attached to each tooth has a winding frame section on which a conductive wire of a coil is wound, and several projections extending from the winding frame section, which are provided at least at one corner section of an angled section of the coil body, so that a conductive wire is wound on in such a way that it fits into the resulting groove. LISTED PATENT DOCUMENT Patent specification 1: JP 3 169 314 B2 ( Fig. 1, Fig. 2 and Fig. 3) Patent specification 2: JP 3 625 185 B2 ( Fig. 3, Fig. 4 and Fig. 5) Patent specification 3: JP 2009- 153 312 A ( Fig. 5) Patent specification 4: US 2011 / 0 156 512 A1 Patent specification 5: EP 1 729 398 A2 Patent specification 6: JP 2005- 261 159 A Patent specification 7: JP 2001- 197 696 A Patent specification 8: DE 10 2004 055 317 A1 Patent specification 9: EP 2 372 878 A2 SUMMARY OF THE INVENTION PROBLEMS THAT THE INVENTION IS INTENDED TO SOLVE.

[0009] In the coil shown in patent specification 2, a regularly oriented surface is located on a side surface on one side in the circumferential direction of each tooth, and a crossing section of a coil is located on a side surface of the adjacent tooth, which is opposite the said side surface, whereby the teeth compensate for each other's space and the space factor of the coil is improved.

[0010] However, it is difficult to wind a coil tightly on a surface with a crossing section, and as a result, a gap between conductive wires also occurs on a side surface on which a coil is regularly wound, creating a problem that unnecessary space in a coil cannot be eliminated.

[0011] Additionally, in the case where the directions of conductive wires wound onto adjacent teeth are such that a forward winding and a reverse winding are arranged alternately, a winding method in which two opposite side surfaces of the adjacent teeth are symmetrical in the right-left direction presents a problem in that, due to an encounter with a crossing section of a coil, a surface with a crossing section and a surface on which a conductive wire of a coil is regularly aligned cannot be alternately located on opposite side surfaces of the adjacent teeth.

[0012] Additionally, on a surface containing a crossing section, the crossing section is formed by winding a coil in an oblique direction opposite to a coil in a lower layer. Therefore, the coil space factor can be reduced if a coil is not wound carefully.

[0013] Although the coil space factor can be improved in the arrangement of crossing sections of coils shown in patent specification 3, since a winding method is used in which a crossing section is arranged on a side surface of each tooth which is an end surface in the axial armature direction, the time required to wind a conductive wire onto a side surface on which a crossing section is formed for the first winding turn of a coil is shorter than in a winding method in which a crossing section is arranged on a side surface opposite the adjacent tooth.

[0014] Therefore, it is necessary to slow down the winding speed when forming a crossover section while winding a conductive wire. This creates the problem that the winding speed cannot be increased, resulting in a decrease in the winding process's productivity.

[0015] Patent specification 4 relates to a stator of a rotating electric machine, comprising connecting elements for joining bridging wires between adjacent magnetic pole coils of the stator of the rotating electric machine, and to its manufacturing method. In a conventional connecting element, the parts to be connected to the bridging wires are U-shaped and have openings on the opposite side of the core end face where the bridging wires are arranged. This necessitated complex drive controls for the U-shaped connecting parts to insert the bridging wires into the openings. To simplify the drive controls, such curved connecting sections each have openings facing the end face of a core.The present invention can be generally applied to stators of rotating electrical machines that comply with the coil connection specifications.

[0016] Patent specification 5 relates to a stator of a rotating electrical machine, comprising a stator core (112) and multiphase stator coils (114) installed in the stator core (112). The stator core (112) is formed by joining a plurality of split core sections. Each of the stator coils (114) is wound by a concentrated winding process around a coil former (112BO) attached to the outer circumferential surface of the tooth section of a respective core section, and the respective coils (114), which have the same phase but different winding directions, are continuously wound around adjacent tooth sections.A crossover wire (EL) for connecting the first stator coil (114(U1+)) wound around the first tooth section and the second stator coil (114(U1-)) wound around the second tooth section is located at a position that is further towards the center in the axial direction of the coil body (112BO) than the end section of the coil body (112BO), including that end section.

[0017] Patent specification 6 relates to a stator 1 of a single-phase intermediate tap system in a magnet generator. The stator 1 is wound with a first winding 3, which is wound on each pole of 2A, 2C, 2E, 2G, 2I, 2K, skipping one pole in the same winding direction from the winding start pole 2A to the intermediate tap winding end pole 2K, and with a second winding 4, which is wound on each pole of 2B, 2D, 2F, 2H, 2J, 2L, skipping one pole in the opposite winding direction to the winding direction of the first winding, and with a second winding 4, which is wound on each pole of 2B, 2D, 2F, 2H, 2J, 2L, skipping one pole in the opposite winding direction to the winding direction of the first winding, and with a second winding 4, which is wound on each pole of 2B, 2D, 2F, 2H, 2J, 2L is wound,wherein one pole is skipped in the opposite winding direction to the winding direction of the first winding, and the device allows for a short external connection lead and facilitates the connection of the lead and the windings to the terminals.

[0018] Patent specification 7 shows adjacent in-phase windings 4a, 4b, each consisting of winding elements A1, A2 and B1, B2. The inner winding element A1 and the outer winding element B2 are connected in series, and A2 and B1 are connected in series. The impedances of both series circuits are balanced and connected in parallel. Since the number of parallel circuits is increased, thinner wires can be used, the workability is improved, and the space requirement is reduced.

[0019] Patent specification 8 relates to a primary part of an electric rotating field machine, in particular a synchronous or linear motor, with a plurality of modules (20), each having teeth (25) arranged in a row with at least partially circumferential grooves (40), wherein a coil (30) is wound around each tooth (25) in the groove (40), and the coils (30) of a single module (20) are connected to a single phase of a three-phase network, and the number of modules (20) in the primary part (10) is equal to the number of current phases or an integer multiple thereof, wherein a single module (20) comprises an odd number of teeth (25), but at least three teeth (25), and wherein directly adjacent teeth (25) of a single module (20) have coils (30) with an opposite winding direction, which produces an opposite magnetic field polarity at the teeth (25).DOLLAR A Furthermore, the invention relates to an electric rotating field machine, in particular a synchronous or linear motor, with a primary part (10) and with a secondary part (100) which interacts with the primary part (10) via an air gap and which preferably has permanent magnets as the rotor magnet (110).

[0020] Patent specification 9 discloses a group of coils 10a, 10d, 10g, 10j; 10b, 10e, 10h, 10k; 10c, 10f, 10i, 101, which are used in a stator of a rotating electrical machine and which are continuously wound with a crossed wire 15U2, 15U3, 15U4; 15V2, 15V3, 15V4; 15W2, 15W3, 15W4 on a split core 11, wherein 2N coils 10a, 10d, 10g, 10j; 10b, 10e, 10h, 10k; 10c, 10f, 10i, 10l (where N is a natural number) are arranged at approximately regular intervals, with a winding direction of N coils 10a, 10d; 10b, 10e; 10c, 10f, which are the first to Nth continuously wound coils, a front half of the 2N coils, and a winding direction of the rear half of the coils 10g, 10j; 10h, 10k; 10i, 10l, which are the (N+1)th to (2N)th continuously wound coil, being opposite.

[0021] The present invention was made to solve the aforementioned problems, and one object of the present invention is to provide an armature for an electric rotary machine, an insulator for it, and a coil winding device that can properly form a crossing section of a coil and improve the overall space factor of coils without making the productivity in a coil winding process worse.

[0022] The solution to the problem is achieved by an anchor according to independent claim 1. IMPACT OF THE INVENTION

[0023] In the armature for an electric rotary machine, according to the present invention, in each of all forward-wound and reverse-wound coils, a portion wound on a first side face of two side faces of each tooth, opposite the respective adjacent teeth, forms a straight section in which the conductive wires in respective layers of the coil are parallel, and a portion wound on a second side face forms a crossing section in which the conductive wire in an upper layer is wound in a crossed manner onto the conductive wire in an adjacent lower layer, and a guide is provided to guide the conductive wire on a first turn of each coil along a base of a flange of each insulator. Therefore, it becomes possible to wind the first turn of each coil precisely and to wind the subsequent turns in a precisely regular alignment.

[0024] The insulator for an armature of an electric rotary machine according to the present invention can be attached to a tooth, thereby insulating a coil, and has a guide for guiding a first turn of a conductive wire along the base of a flange of the insulator at the point where the winding of the coil begins. Therefore, it becomes possible to wind the first turn of each coil precisely and to wind the subsequent turns in a precisely regular alignment.

[0025] The coil winding device according to the present invention comprises: a holder section for fixing a tooth to which an insulator has been attached, the insulator having a guide for guiding a first turn of a conductive wire along the base of a flange at the point where the winding of the coil is located; a flyer section for winding the conductive wire onto a side face of the tooth by rotating it around the tooth; and a flyer position control section for moving the flyer section in a central axis direction of the tooth, just before the conductive wire in an upper layer is wound in a crossed manner onto the conductive wire in an adjacent lower layer, onto a side face of the insulator on which the guide is provided. Therefore, precise positioning of the crossing section is possible.

[0026] Additionally, it becomes possible to suppress collisions between the conductive wires or excessive collisions between the conductive wire and the guide, so that the conductive wire can be wound regularly and the quality of the coil can be improved.

[0027] Furthermore, since the crossing section is provided on a side surface opposite the adjacent tooth, the flyer section can rotate around the tooth at high speed and perform the winding in a regularly aligned manner with high density, and the productivity of a coil can also be improved.

[0028] The coil winding device according to the present invention comprises: a holder section for rotating a tooth to which an insulator is attached, the insulator having a guide for guiding a first turn of a conductive wire along the base of a flange at the location of the coil winding start, the holder section thereby winding the conductive wire onto a side face of the tooth; and a winding position control section designed to move in a central-axis direction of the tooth, just before the conductive wire in an upper layer is wound in a crossed manner onto the conductive wire in an adjacent lower layer, onto a side face of the insulator on which the guide is provided. Therefore, the positioning of the crossing section can be carried out precisely.

[0029] Additionally, it becomes possible to suppress collisions between the conductive wires or excessive collisions between the conductive wire and the guide, so that the conductive wire can be wound regularly and the quality of the coil can be improved. BRIEF DESCRIPTION OF THE DRAWINGS Fig. Figure 1 is a front view of an armature for an electric rotary machine according to embodiment 1 of the present invention. Fig. Figure 2 is a front view, a sectional view and a rear view of a tooth system of the armature for an electric rotary machine according to embodiment 1 of the present invention. Fig. Figure 3 is a front view of the tooth system of the armature for an electric rotary machine according to embodiment 1 of the present invention. Fig. Figure 4 is a perspective view of a clockwise winding insulator attached to a tooth of an iron core of the armature for an electric rotary machine according to embodiment 1 of the present invention, seen from two directions. Fig. 5 is a sectional view as a section on the central tooth section of the iron core, where the in Fig. The 4 shown clockwise winding insulator was attached. Fig. Figure 6 is a perspective view of a counterclockwise winding insulator attached to a tooth of the iron core of the armature for an electric rotary machine according to embodiment 1 of the present invention, seen from two directions. Fig. 7 is a sectional view as a section on the central tooth section of the iron core, where the in Fig. The counterclockwise winding insulator shown in section 6 was attached. Fig. Figure 8 shows a right and left side view of the iron core to which the in Fig. 4. A clockwise winding insulator was attached, in which the winding of a coil is shown. Fig. 9 is a right and left side view of the iron core to which the in Fig. Figure 6 shows a counterclockwise winding insulator, in which the winding is shown in the first layer of a coil. Fig. Figure 10 is a view showing a main part of a left side surface of a clockwise winding insulator attached to a tooth of an iron core of an armature for an electric rotary machine according to embodiment 2 of the present invention. Fig. Figure 11 is a front view of an armature for an electric rotary machine according to embodiment 3 of the present invention. Fig. Figure 12 is a view showing the construction of a coil winding device according to embodiment 4 of the present invention. Fig. Figure 13 is a sectional view of a tooth according to embodiment 4 of the present invention. Fig. Figure 14 is a view showing the construction of a coil winding device according to embodiment 5 of the present invention. Fig. 15 is an enlarged view of a winding in the second layer of the in Fig. 8 shown coil. DESCRIPTION OF THE EXECUTION FORMS Execution form 1

[0030] In the following, an armature for an electric rotary machine and an insulator for it according to embodiment 1 of the present invention are described with reference to the drawings.

[0031] Fig. Figure 1 is a front view of an armature 100 for an electric rotary machine.

[0032] Fig. 2(a) is a front view of a tooth system 101 of the anchor 100.

[0033] Fig. 2(d) is a sectional view of the tooth system 101 of the anchor 100.

[0034] Fig. 2(c) is a rear view of the tooth system 101 of the anchor 100.

[0035] Fig. 3 is an enlarged view of Fig. 2(a).

[0036] Fig. Figure 4 is a perspective view of a clockwise winding insulator 2a attached to a tooth of an iron core 1, seen from two directions.

[0037] Fig. Figure 6 is a perspective view of a counterclockwise winding insulator 2b attached to a tooth of the iron core 1, seen from two directions.

[0038] As in Fig. As shown in Figure 3, the tooth system 101 of the armature 100, which is a rotor, is formed by the clockwise winding insulator 2a and the counterclockwise winding insulator 2b being alternately attached to teeth of the iron core 1, which are arranged in a ring shape.

[0039] The clockwise winding insulator 2a and the counterclockwise winding insulator 2b are each formed by an insulating resin.

[0040] On these insulators, coils 3a and 3b are formed in a regularly aligned manner by concentrated winding, whereby the in Fig. The anchor shown will receive 100.

[0041] On the tooth where the clockwise winding insulator 2a is located, as in Fig. As shown in Figure 4, a conductive wire is wound clockwise with a view to the axis of rotation (which corresponds to the forward winding within the scope of the claims).

[0042] On the tooth where the counterclockwise winding insulator 2b is attached as in Fig. As shown in Figure 6, a conductive wire is wound counterclockwise with respect to the axis of rotation (which corresponds to the reverse winding within the scope of the claims).

[0043] Of a section of the clockwise winding insulator 2a covering the tooth, the right side, looking towards the axis of rotation from the outer circumferential side, is referred to as the right side surface 21a (which corresponds to a first side surface within the scope of the claims), and the left side is referred to as the left side surface 22a (which corresponds to a second side surface within the scope of the claims).

[0044] Similarly, of a section of the counterclockwise winding insulator 2b covering the tooth, the right side, looking towards the axis of rotation from the outer circumferential side, is designated as the right side surface 21b (which corresponds to a first side surface within the scope of the claims), and the left side is designated as the left side surface 22b (which corresponds to a second side surface within the scope of the claims).

[0045] Next, the construction methods of the clockwise winding insulator 2a and the counterclockwise winding insulator 2b and the process for forming the coil 3a and the coil 3b by winding conductive wires onto the teeth provided with these insulators are described.

[0046] Fig. Figure 8(a) is a right and left side view of the iron core to which the clockwise winding insulator 2a was attached.

[0047] Fig. Figure 8(b) is a view showing the winding in the first layer of the coil 3a on the tooth of the iron core to which the clockwise winding insulator 2a was attached.

[0048] Fig. Figure 8(c) is a view showing the winding in the second layer of the coil 3a at the tooth of the iron core to which the clockwise winding insulator 2a was attached.

[0049] Fig. 15 is an enlarged view of Fig. 8(c).

[0050] Fig. Figure 5 is a sectional view of the clockwise winding insulator 2a as a section at a mid-section of a tooth 11.

[0051] Fig. 9(a) is a right and left side view of the iron core to which the counterclockwise winding insulator 2b was attached.

[0052] Fig. Figure 9(b) is a view showing the winding in the first layer of the coil 3b at the tooth of the iron core to which the counterclockwise winding insulator 2b was attached.

[0053] Fig. Figure 7 is a sectional view of the counterclockwise winding insulator 2b as a section at a mid-section of a tooth 11.

[0054] For the sake of simplicity, the following uses the terms “above”, “upper”, “below”, “lower”, or similar, to indicate any direction or location in any drawing unless otherwise specified.

[0055] At the upper right end of an inner flange 23a of a Fig. In the clockwise winding insulator 2a shown in Figure 4, an insertion opening 24a is provided through which a conductive wire 4, which is to be wound onto the tooth 11 to which the clockwise winding insulator 2a has been attached, is inserted from the outside.

[0056] Additionally, at the inner upper end in the direction of rotation from the left side surface 22a, i.e. at the upper end of a section corresponding to the base of the inner flange 23a, a transverse guide 25a with the same width as the outer diameter of the conductive wire 4 is formed integrally with the clockwise winding insulator 2a.

[0057] The transverse guide 25a is used to guide the first initial turn of the conductive wire 4 of the coil 3a to be wound onto the clockwise winding insulator 2a at an angle.

[0058] From the upper end of the transverse guide 25a, a dummy guide 26a is provided at the base of the inner flange 23a on the upper end surface of the tooth section of the clockwise winding insulator 2a to fill a gap between the first initial turn of the conductive wire 4 of the coil 3a and the inner flange 23a.

[0059] Next, the procedure for actually winding a coil onto the clockwise winding insulator 2a is described.

[0060] First, the conductive wire 4 is inserted through the insertion opening 24a of the inner flange 23a from the axis of rotation side of the armature 100.

[0061] Then the first initial turn of the conductive wire 4 is placed along the base of the inner flange 23a in Fig. 5 wound to the right.

[0062] This involves, as in Fig. 8(b) shows the first turn of the conductive wire 4 wound tightly along the inner flange 23a from the right side surface 21a.

[0063] Then, after being wound along the inner flange 23a to reach the lower section of the left side surface 22a, the conductive wire 4 is wound obliquely from the lower end of the left side surface 22a, so as to be separated from the base of the inner flange 23a, along the right side of the transverse guide 25a in Fig. 8(b) led.

[0064] Then the conductive wire 4 is wound along the blind guide 26a.

[0065] In the second and subsequent turns, the conductive wire 4 is guided from its previously wound part to form the first layer of the regularly aligned coil 3a.

[0066] In the first layer of the coil 3a wound in this way, the wire on the right side surface 21a is parallel to the inner flange 23a and wound straight at each turn to reach the base of an outer flange 27a of the clockwise winding insulator 2a.

[0067] Then, when it is reversed at the base of the outer flange 27a, the conductive wire 4 is stacked on the right side surface 21a in a cloverleaf formation in the middle between wires of the coil 3a in the first layer, thus forming the second layer of the coil 3a.

[0068] Thus, on the right-hand side surface 21a, the coil 3a is wound in such a way that it is regularly aligned parallel to the inner flange 23a and outer flange 27a at each turn, thereby forming a straight section S of the coil 3a, as shown in Fig. 8(c) is shown.

[0069] On the other hand, on the left side surface 22a in the first layer of the coil 3a, each wire turn is wound obliquely along the first turn of the conductive wire 4, which was wound obliquely with respect to the inner flange 23a in order to reach the base of the outer flange 27a.

[0070] Then, if it is reversed at the base of the outer flange 27a, as in Fig. 8(c) shows the conductive wire 4 on the left side surface 22a in the upper layer stacked such that it runs transversely in the oblique opposite direction with respect to the coil 3a in the first layer, forming a crossing section C and thus the second layer of the coil 3a.

[0071] Thus, on the left side surface 22a, the coil 3a is wound in a regularly aligned manner at each turn such that the wires in the upper and lower adjacent layers cross each other obliquely with respect to the inner flange 23a and the outer flange 27a.

[0072] Next, the counterclockwise winding insulator 2b will be described.

[0073] At the upper left end of an inner flange 23b of the in Fig. In the counterclockwise winding insulator 2b shown in Figure 6, an insertion opening 24b is provided through which a conductive wire 4, which is to be wound onto the tooth 11 to which the counterclockwise winding insulator 2b has been attached, is inserted from the outside.

[0074] Additionally, at the inner lower end in the direction of rotation from the left side surface 22b, i.e. at the lower end of a section corresponding to the base of the inner flange 23b, a transverse guide 25b is provided integrally formed with the clockwise winding insulator 2a.

[0075] The transverse guide 25b is used to guide the first initial turn of the conductive wire 4 of the coil 3b to be wound onto the counterclockwise winding insulator 2b at an angle.

[0076] From the lower end of the transverse guide 25b, a blind guide 26b with the same width as the outer diameter of the conductive wire 4 is provided along the base of the inner flange 23b of the counterclockwise winding insulator 2b, excluding the left side surface 22b, in order to fill a gap between the first initial turn of the conductive wire 4 of the coil 3b and the inner flange 23b.

[0077] Next, the procedure for winding a coil onto the counterclockwise winding insulator 2b will be described using the following examples: Fig. 6, Fig. 7 and Fig. 9 described.

[0078] First, the conductive wire 4 is inserted through the insertion opening 24b of the inner flange 23b from the axis of rotation side of the armature.

[0079] Then the first initial turn of the conductive wire is placed along the base of the inner flange 23b in Fig. 7 wound to the left.

[0080] This involves, as in Fig. 9(b) shown, from a point in close contact with the inner flange 23b on the upper section of the left side surface 22b, the first turn of the conductive wire 4, in order to be separated from the base of the inner flange 23b, extends obliquely along the right side of the transverse guide 25b in Fig. 9(b) led.

[0081] Then, after it has been wound so that it reaches the lower section of the left side surface 22b, the conductive wire 4 is wound parallel to the inner flange 23b along the blind guide 26b, which has the same width as the transverse guide 25b and is provided in an area from the lower end of the transverse guide 25b, through the lower tooth end surface and the right side surface 21b to the insertion opening 24b on the tooth surface along the base of the inner flange 23b.

[0082] In the second and subsequent turns, the conductive wire 4 is guided from its previously wound part to form the first layer of the regularly aligned coil 3b.

[0083] In the first layer of the coil 3b wound in this way, the wire on the right side surface 21b is parallel to the inner flange 23b and wound straight at each turn to reach the base of an outer flange 27b of the counterclockwise winding insulator 2b.

[0084] Then, when it is reversed at the base of the outer flange 27b, the conductive wire 4 is stacked on the right side surface 21b in a cloverleaf formation in the middle between wires of the coil 3b in the first layer, thus forming the second layer of the coil 3b.

[0085] On the right-hand side surface 21b, the coil 3b is wound in such a way that it is regularly aligned parallel to the inner flange 23b and outer flange 27b at each turn, thereby forming a straight section S of the coil 3b.

[0086] On the other hand, on the left side surface 22b in the first layer of the coil 3b, each wire turn is wound obliquely along the first turn of the conductive wire 4, which was wound obliquely with respect to the inner flange 23b in order to reach the base of the outer flange 27b.

[0087] Then, when it is reversed at the base of the outer flange 27b, the conductive wire 4 is stacked on the left side surface 22b in the upper layer such that it runs transversely in the oblique opposite direction with respect to the coil 3b in the first layer, forming a crossing section C and thus the second layer of the coil 3b.

[0088] Thus, on the left side surface 22b, the coil 3b is wound in a regularly aligned manner at each turn such that the wires in the upper and lower adjacent layers cross each other obliquely with respect to the inner flange 23b and the outer flange 27b.

[0089] As described above, the in Fig. 1 In the armature 100 shown, the coils 3a and 3b are wound in a regularly aligned manner by concentrated winding in alternating opposite directions, and the coils 3a and 3b each have crossing sections C on the sides of the left side surfaces 22a and 22b in the circumferential direction of the teeth as viewed from the outer circumference of the armature 100 with respect to the central axis, and have straight sections S with regular and parallel windings on the right side surfaces 21a and 21b.

[0090] In the case where a winding coil is regularly aligned with a ½ pitch in a cloverleaf formation, the stack height H1 to the nth layer is represented as H1 = d + (n - 1) x 0.866d, where ϕd is the coil diameter. Conversely, the stack height H2 at the crossing section is represented as H2 = n x d. Thus, the winding density decreases at the crossing section.

[0091] Taking this into account, the construction of each coil of the armature 100 is designed such that the straight section and the crossing section of the adjacent coils 3a and 3b are opposite each other, which allows winding spaces to be used efficiently and as a result increases the number of turns of the coils 3a and 3b or increases the outer diameter of the coils.

[0092] Thus, coils 3a and 3b can be wound in a balanced way.

[0093] The armature and the insulator for it according to embodiment 1 of the present invention make it possible to wind the first turns of each coil precisely, which makes it possible to wind the subsequent turns with high accuracy in a regularly aligned manner.

[0094] In particular, thanks to the transverse guide, a coil can be wound diagonally with high accuracy on a side surface of each tooth on which the crossing section is formed, so that a collision at the crossing section is prevented and a coil with a high space factor can be obtained.

[0095] Additionally, thanks to the blind guide connected to the transverse guide, even in a case where the winding start of the first coil winding originates from a side surface of a tooth on which the crossing section is formed, a coil can be wound precisely and straight parallel to the inner flange and outer flange of the insulator on the straight section formed on the opposite surface.

[0096] It should be noted that, in order to achieve the effect of the present invention, the combination of clockwise and counterclockwise winding of coils and the combination of side surfaces on which the crossing section and the straight section are located can be reversed. Design 2

[0097] In the following, a transverse guide provided on an insulator for an armature for an electric rotary machine according to embodiment 2 of the present invention is described with reference to the drawings.

[0098] Fig. Figure 10 is a view showing a main part of a left side surface 222a of a clockwise winding insulator 202a attached to a tooth of an iron core of the armature for an electric rotary machine according to embodiment 2 of the present invention.

[0099] In embodiment 1, the transverse guides 25a and 25b have the same width as the outer diameter of the conductive wire 4.

[0100] In the present embodiment, a transverse guide 225a is designed such that the width at the end of the left side surface, which is closest to the top of a tooth, is the same as the outer diameter of the conductive wire 4, and the shape gradually tapers as it approaches the underside in order to fill a space between the diagonally wound conductive wire 4 and an inner flange 223a.

[0101] The first turn of a coil to be wound at an angle is wound precisely along the transverse guide 225a, whereby each turn of the coil can be wound precisely along each turn immediately preceding it.

[0102] It should be noted that the transverse guide 225a can be provided over the entire length in the direction from top to bottom on the left side surface, or can be provided partially. embodiment 3

[0103] In the following, an armature 300 for an electric rotary machine according to embodiment 3 of the present invention is described with reference to the drawings.

[0104] Fig. Figure 11 is a front view of the armature 300, which is a stator.

[0105] The construction of the present invention is effective for a coil in which a crossing section is precisely formed, and this applies equally when the type of armature is a rotor or a stator.

[0106] In the case of a stator, the construction is the same as in embodiment 1, except that the first coil winding starts from the outer circumferential side of each tooth.

[0107] It should be noted that, as in Fig. 1 and Fig. Figure 11 shows that the present invention can be applied to a rotor or a stator of an armature.

[0108] In particular, in the case of a rotor or stator with an even number of teeth on which coils formed of a conductive wire are wound forward in a concentrated manner and coils formed of a conductive wire are wound backward in a concentrated manner are arranged alternately, one of the opposing side faces of the adjacent teeth is a surface on which a crossing section C is formed, and the other side face is a surface on which a straight section S is formed.

[0109] Therefore, on opposite side surfaces of the adjacent teeth, a surface on which a crossing section C is formed and a surface on which a straight section S is formed are arranged alternately.

[0110] Additionally, each iron core of a rotor and a stator can be an integrated iron core or a split iron core.

[0111] In the present embodiment, at a part where the coils wound onto the adjacent teeth are opposite each other, a crossing section of one of the coils and a straight section of the other coil are opposite each other, so that the coils can be wound precisely with a high space factor.

[0112] Additionally, on opposing side surfaces of adjacent teeth, a surface with a crossing section and a surface with a straight section are arranged alternately, thereby maximizing the effect of improving the space factor of coils and also ensuring productivity by carrying out high-speed winding. Design 4

[0113] In the following, a coil winding device 400 according to embodiment 4 of the present invention is described with reference to the drawings.

[0114] Fig. Figure 12 is a graphic representation showing the construction of the coil winding device 400.

[0115] The coil winding device 400 is a device for forming a coil by winding the conductive wire 4 onto the tooth 11 to which the clockwise winding insulator or the counterclockwise winding insulator has been attached.

[0116] The coil winding device 400 consists of a tensioner section 44, a flyer position control section 43, a flyer section 42 and a holder section 41.

[0117] The tensioning section 44 adjusts the conductive wire 4 so that it does not sag.

[0118] The flyer position control section 43 is movable in the mid-axis direction of tooth 11 and controls the position of the flyer section 42 in relation to tooth 11.

[0119] The details for controlling the position of flyer section 42 will be described later.

[0120] The flyer section 42 rotates around tooth 11 to wind the conductive wire 4 onto side surfaces of tooth 11.

[0121] The retainer section 41 secures tooth 11.

[0122] Next, the operation of the coil winding device 400, which winds the conductive wire 4 onto the tooth 11 to which the clockwise winding insulator 2a has been attached, will be described with reference to Fig. 4, Fig. 5, Fig. 8 and Fig. 12 described.

[0123] To begin winding a coil, the conductive wire 4 wound onto a coil former passes through the tensioner section 44 and then the flyer position control section 42 and is then secured outside the insertion opening 24a of the inner flange 23a of the insulator.

[0124] The flyer position control section 43 adjusts the position of the flyer section 42 so that the tip end of a nozzle is positioned at the insertion opening 24a of the inner flange 23a of the insulator in Fig. 4) is reached, where the beginning of the winding of the first initial turn of the conductive wire 4 is located.

[0125] Next, flyer section 42 begins, starting from the upper section of the right side surface 21a in the circumferential direction of tooth 11 (to the right in Fig. 5) to turn to begin winding the conductive wire 4 onto the right side surface 21a.

[0126] When the flyer section rotates to the lower section of the left side surface 22a, the conductive wire 4 is wound tightly along the inner flange 23a on the right side surface 21a, as shown in Fig. 8(b) is shown.

[0127] Furthermore, when the flyer section 42 rotates from the lower section of the left side surface 22a to the upper end surface of a tooth section of the clockwise winding insulator 2a (hereinafter referred to as the upper end surface of the tooth section), the conductive wire 4 is wound along the transverse guide 25a and the blind guide 26a.

[0128] In the second and subsequent turns, the conductive wire 4 is wound along its previously wound part to reach the outer flange 27a, thus forming the first layer of the coil 3a.

[0129] Next, the process of winding the conductive wire 4 into the second layer of the coil 3a will be described.

[0130] At the final turn in the first layer of the coil 3a, when the conductive wire 4 has been wound to reach the corner at the bottom of the left side surface 22a, the flyer position control section 43 moves, just before the flyer section 42 rotates from the corner at the bottom of the left side surface 22a to begin winding the second layer, the position of the flyer section 42 in the mid-axis direction of the tooth by a predetermined distance forward.

[0131] Then, when the flyer section 42 rotates to the corner at the upper end of the tooth section, the conductive wire 4 is wound in a crossed manner onto the first layer of the coil 3a in the oblique opposite direction, as shown in Fig. 8(c) is shown.

[0132] Then, as the flyer section 42 rotates further to the lower section of the right side surface 21a, the conductive wire 4 is wound onto the center between wires of the coil 3a in the first layer.

[0133] As described above, on the right side surface 21a the second layer of the coil 3a is formed stacked in a cloverleaf formation, and on the left side surface 22a the second layer of the coil 3a is formed such that it forms a crossing section C at which the coil 3a in the upper layer is stacked to run transversely in the oblique opposite direction with respect to the coil 3a in the first layer.

[0134] In the second and subsequent layer, the wire is wound in the same way to form coil 3a.

[0135] Next, the functional sequence of the coil winding device 400, which winds the conductive wire 4 onto the tooth 11 to which the counterclockwise winding insulator 2b has been attached, will be described with reference to Fig. 6 and Fig. 7 described.

[0136] In comparison to the case of attaching the clockwise winding insulator 2a, the functional sequence differs in that the positions of the transverse guide 25b and the dummy guide 26b are as shown in Fig. Figure 7 shows the direction of rotation of flyer section 42 in Fig. 7 to the right, and the conductive wire 4 is wound from a surface on which a crossing section is formed.

[0137] Although it differs in the points mentioned above, the functional sequence is the same insofar as flyer section 42 in Fig. 7 rotates to the left, on the left side surface 22b the conductive wire 4 is wound along the transverse guide 25b and the blind guide 26, and then, as the flyer section 42 continues to rotate, on the right side surface 21b the conductive wire 4 is wound tightly along the inner flange 23b.

[0138] Furthermore, the functional sequence of the flyer position control section 43 is also the same when a crossing section is formed on the left side surface 22b in the second layer, so that the flyer position control section 43, just before the flyer section 42 rotates from the upper end surface of a tooth section to begin winding in the second layer, moves the position of the flyer section 42 forward in the center axis direction by a predetermined distance.

[0139] Additionally, even in the case where the armature is a stator, the functional sequence is the same, except that the first winding starts from the outer circumferential side of a tooth.

[0140] Next, a time required to wind the conductive wire 4 in the case that the crossing section C is provided on a side face of each tooth which is an end face in the axial anchor direction, and a time required in the case that the crossing section C is provided on a side face opposite the adjacent tooth are described.

[0141] Fig. Figure 13 is a sectional view of tooth 11 in a direction perpendicular to the radial anchor direction.

[0142] A side face of the tooth, which is an end face in the axial anchor direction, is defined as the upper end face 28a.

[0143] In Fig. 13 focuses on the angle between two diagonal lines of tooth 11.

[0144] The angle between two diagonal lines of tooth 11, which faces the upper end surface 28a, is defined as angle H.

[0145] The angle between two diagonal lines of tooth 11, which faces the left side surface 22a, is defined as angle I.

[0146] The time required to wind the conductive wire 4 onto a side face of the tooth 11 is proportional to the magnitude of the angle facing that side face. Therefore, the larger the angle, the longer the time required to wind the conductive wire 4 onto the side face.

[0147] This means that, since the angle I is larger than the angle H, provided that the conductive wire 4 is wound at the same rotational speed, if the crossing section C is provided on the left side face 22a, the crossing section C can be formed, taking a longer time than if the crossing section C is provided on the upper end face 28a.

[0148] Therefore, it is not necessary to slow down the winding speed of the conductive wire 4 each time the crossing section C is formed, and the rotational speed of the flyer section 42 can be designed to be constant.

[0149] This improves productivity in the winding process.

[0150] As described above, in the coil winding device 400 according to embodiment 4 of the present invention, the flyer position control section moves the position of the flyer section in the central axis direction of the tooth exactly before the conductive wire is wound in a crossed manner, thereby enabling precise positioning of the crossing section.

[0151] Furthermore, it becomes possible to suppress collisions between conductive wires or excessive collisions between a conductive wire and a guide, so that a conductive wire can be wound regularly and the quality of a coil can be improved.

[0152] Since the transverse guide and the blind guide are also provided on the insulator, the conductive wire is wound along these guides when the flyer section rotates, allowing the conductive wire to be wound further and more regularly.

[0153] Furthermore, since a crossing section is provided on a side surface opposite the adjacent tooth, the flyer section can rotate around the tooth at high speed and perform the winding in a regularly aligned manner with high density, and the productivity of a coil can also be improved. Design 5

[0154] In the following, a coil winding device 500 according to embodiment 5 of the present invention is described in contrast to embodiment 4 with reference to the drawings.

[0155] Fig. Figure 14 is a graphic representation showing the construction of the coil winding device 500.

[0156] The coil winding device 500 is a device for forming a coil by winding the conductive wire 4 onto the tooth 11 to which the clockwise winding insulator or the counterclockwise winding insulator has been attached.

[0157] The coil winding device 500 consists of the tensioner section 44, a winding position control section 51 and a holder section 52.

[0158] The tensioning section 44 adjusts the conductive wire 4 so that it does not sag.

[0159] The winding position control section 51 is movable in the center axis direction of the tooth 11 and controls the position of the wire when the conductive wire 4 is wound onto the tooth 11.

[0160] The details for controlling the wire's position will be described later.

[0161] The holder section 52 rotates the tooth 11 to wind the conductive wire 4 onto side surfaces of the tooth 11.

[0162] Next, the functional sequence of the coil winding device 500, which winds the conductive wire 4 onto the tooth 11, will be described in a way that differs from embodiment 4 with regard to Fig. 4 and Fig. 8 described.

[0163] In embodiment 4, the flyer section 42 rotates around the tooth 11, whereby the conductive wire 4 is wound onto side surfaces of the tooth 11.

[0164] In the present embodiment, the holder section 52 rotates the tooth 11, whereby the conductive wire 4 is wound onto side surfaces of the tooth 11.

[0165] The winding position control section 51 corresponds to the flyer position control section 43 of embodiment 4.

[0166] On the left side surface 22a of Fig. 4 The winding position control section 51 moves in the center axis direction of the tooth 11 by a predetermined distance, just before the holder section 52 rotates to wind up the conductive wire 4.

[0167] Then, when the holder section 52 rotates, the conductive wire 4 is wound up so that it runs transversely in the oblique opposite direction on the first layer of the coil 3a, as shown in Fig. 8(c) is shown.

[0168] As described above, in the coil winding device 500 according to embodiment 5 of the present invention the same effect is provided as in embodiment 4, and the winding position control device also moves the position of the wire when the conductive wire is wound onto the tooth, in the central axis direction of the tooth, just before the conductive wire is wound in a crossed manner, thereby enabling precise positioning of the crossing section.

[0169] Furthermore, it becomes possible to suppress collisions between conductive wires or excessive collisions between a conductive wire and a guide, so that a conductive wire can be wound regularly and the quality of a coil can be improved.

[0170] Since the transverse guide and the blind guide are also provided on the insulator, a conductive wire is wound along these guides when the holder section rotates, allowing the conductive wire to be wound further and more regularly.

[0171] It should be noted that within the scope of the present invention, the foregoing embodiments can be freely combined, or each of the foregoing embodiments can be modified or abbreviated as appropriate.

Claims

[1] An armature (100) for an electric rotary machine, having an even number of teeth (11) provided with insulators (2a, 2b) for electrical insulation, arranged in a ring shape, and having a coil (3a) obtained by winding a conductive wire (4) forward, i.e., clockwise with respect to an axis of rotation, from an outer circumferential side of each tooth (11), in a concentrated manner, and a coil (3b) obtained by winding a conductive wire (4) alternately onto each tooth (11) in a concentrated manner backward, i.e., counterclockwise with respect to the axis of rotation, from the outer circumferential side of each tooth (11), wherein In each of all forward-wound coils (3a) and backward-wound coils (3b), a straight section (S) is formed in which the conductive wires (4) in respective layers of the coil are parallel, on a portion wound onto a first side surface (21a, 21b) of two side surfaces of each tooth (11) covering insulator (2a, 2b) opposite the respective adjacent tooth, wherein the first side surface (21a, 21b) is a right-hand side surface facing the axis of rotation from the outer circumferential side of each tooth (11), and a crossing section (C) in which the conductive wire (4) in an upper layer is wound in a crossed manner onto the conductive wire (4) in an adjacent lower layer on a portion wound onto a second side surface (22a, 22b) of the two side surfaces, wherein the second side surface (22a, 22b) is a left-hand side surface facing the axis of rotation is formed from the outer circumferential side of each tooth (11), and a clockwise winding insulator (2a), arranged as an insulator of each tooth (11) of which the coil (3a) wound forward thereon has a transverse guide (25a) to wind the first winding turn of the conductive wire (4) to be wound onto the second side surface (22a) obliquely with respect to an axis of the armature (100) and along an inner flange (23a) of the clockwise winding insulator (2a), wherein the transverse guide (25a) is arranged along an end section where the first winding turn on the second side surface (22a) terminates, and a counterclockwise winding insulator (2b), arranged as an insulator of each tooth (11) whose reverse-wound coil (3b) has a transverse guide (25b) to wind the first winding turn of the conductive wire (4) to be wound onto the second side surface (22b) obliquely with respect to the axis of the armature (100) and along an inner flange (23b) of the counterclockwise winding insulator (2b), wherein the transverse guide (25b) is arranged axially opposite the transverse guide (25a) of the clockwise winding insulator (2a) and along the end section where the first winding turn on the second side surface (22b) terminates. [2] Anchor for an electric rotary machine according to claim 1, wherein the length of each tooth (11) in an axial direction of the anchor (100) is greater than the length of the tooth (11) in a circumferential direction of the anchor (100). [3] Anchor for an electric rotary machine according to claim 1 or 2, wherein a blind guide (26a, 26b) is connected to the transverse guide (25a, 25b) to guide the conductive wire (4) parallel to a flange of the insulator (2a, 2b) on at least a part of surfaces except the second side surface (22a, 22b) of each tooth (11). [4] Anchor for an electric rotary machine according to claim 3, wherein the blind guide (26a, 26b) has a shape that fills at least part of a gap between the first turn of the wire and the insulator (202a). [5] Armature for an electric rotary machine according to any one of claims 1 to 4, wherein the flange of the insulator (2a, 2b) is an inner flange in the case where the armature is a rotor, or an outer flange in the case where the armature is a stator.

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