JP6577447B2 - Rotating electric machine stator manufacturing equipment - Google Patents

Description

  The present invention relates to a stator manufacturing apparatus used for a rotating electrical machine such as an electric motor or a generator.

  A rotating electrical machine such as an electric motor or a generator mounted on a vehicle includes a rotor and a stator. The stator includes a stator core having a plurality of slots, and a stator winding wound around each slot. The stator winding is wound as a phase winding along the circumferential direction of the stator core, and a plurality of phase windings are arranged in the radial direction of the stator core, that is, from the inner circumferential side to the outer circumferential side of the stator core. Arranged.

  In the stator winding, a plurality of coil conductors formed in a substantially U shape are inserted into the slot from one end of the stator core in the axial direction, and the end of the coil conductor is slotted at the other end of the stator core. By being protruded from, it is fitted into the stator core. The plurality of coil conductors protruding from the slot at the other end of the stator core are electrically connected with their ends (U-shaped open ends) connected to each other. In order to connect the ends of the plurality of coil conductors to each other, the coil conductors are twisted (bended) in the circumferential direction using a twisting device, and the ends are joined to each other.

  As an example of a conventional stator manufacturing apparatus, Patent Document 1 describes a stator manufacturing apparatus using a twisting device. In the stator manufacturing apparatus described in Patent Document 1, a circumferential drive unit that drives a shaping unit that holds an end of an electric conductor (coil conductor) in the circumferential direction, and an axial drive that drives the shaping unit in the axial direction And a controller for controlling the operation of the circumferential drive unit and the axial drive unit, and a plurality of electrical conductors can be twisted at the same time. The electrical drive is twisted together with the rotation of the twisting jig by the axial drive unit. To prevent it from exiting.

JP 2000-92797 A

  In a conventional stator manufacturing apparatus, a plurality of coil conductors are twisted simultaneously by using a complicated configuration. For example, in the stator manufacturing apparatus described in Patent Document 1, the controller controls the circumferential drive unit and the axial drive unit, and a mechanism for independently controlling these drive units and a layer of coil conductors ( That is, since a mechanism for relatively moving the twisting jig for each coil conductor in the radial direction in the slot is required, there is a problem that the entire system construction is complicated. In addition, in the conventional stator manufacturing apparatus, for example, the coil conductor is twisted by two layers. Therefore, when the number of coil conductor layers is 4 to 8, the twisting process increases and the control system becomes complicated. There is also. For this reason, a stator manufacturing apparatus that can simultaneously twist (bend) a plurality of coil conductors with a simple structure is desired.

  The objective of this invention is providing the stator manufacturing apparatus of a rotary electric machine which can twist a some coil conductor simultaneously with a simple structure.

  The stator manufacturing apparatus for a rotating electrical machine according to the present invention is ring-shaped and can hold the tip end portion of the stator winding housed in the stator core of the stator of the rotating electrical machine, and rotates in its circumferential direction. A circumferential rotating part capable of twisting the tip portion of the stator winding, and a cylindrical shape, and the length direction is perpendicular to the central axis direction of the circumferential rotating part. A rotation drive unit that can be installed in the circumferential rotation unit and can rotate in its circumferential direction. The circumferential rotating portion includes a plurality of twisting jigs arranged in a ring shape and concentrically. Each of the plurality of twisting jigs includes a plurality of groove portions that can hold the tip portion of the stator winding, and can rotate in its circumferential direction. When the rotation drive unit rotates in its circumferential direction, one end side in the length direction rotates the odd-numbered twisting jig from the innermost circumferential side of the circumferential direction rotation unit toward the outer side in the radial direction, The other end side in the length direction rotates the even-numbered twisting jig from the innermost circumferential side of the circumferential-direction rotating part toward the outer side in the radial direction, and the rotation direction of the odd-numbered twisting jig and the The rotation directions of the even-numbered twisting jigs are opposite to each other.

  ADVANTAGE OF THE INVENTION According to this invention, the stator manufacturing apparatus of a rotary electric machine which can twist a some coil conductor simultaneously with a simple structure can be provided.

It is a block diagram of a hybrid electric vehicle. It is sectional drawing of a rotary electric machine. It is a perspective view which shows the external appearance of the stator of a rotary electric machine. It is a figure which shows the coil conductor of the stator coil | winding accommodated in the stator of a rotary electric machine. It is an exploded view which shows the structure of the circumferential direction rotation part of the stator manufacturing apparatus of the rotary electric machine by the Example of this invention. It is a figure which shows the structure of the rotational drive part of the stator manufacturing apparatus of the rotary electric machine by the Example of this invention. It is a figure which shows the coil conductor from which the twist length changes with layers. It is an exploded view which shows the structure of the circumferential direction rotation part from which the space | interval of a convex part differs with a twist jig | tool.

  Hereinafter, a stator manufacturing apparatus for a rotating electrical machine according to an embodiment of the present invention will be described with reference to the drawings. In the following description, a rotary electric machine for a hybrid electric vehicle will be described as an example of the rotary electric machine. In the following description, unless otherwise specified, the “axial direction” refers to the direction along the rotating shaft of the rotating electrical machine, and the “circumferential direction” refers to the direction along the rotating direction of the rotating electrical machine. . The “radial direction” refers to the radial direction of a circle centered on the rotation axis of the rotating electrical machine.

  FIG. 1 is a block diagram of a hybrid electric vehicle equipped with a rotating electric machine. The vehicle 1 includes an engine 2 and a rotating electrical machine 3 as power sources. Note that the vehicle 1 may use two rotating electric machines having different roles in combination. In this case, one rotating electric machine performs both power generation and vehicle driving, and the other rotating electric machine performs vehicle driving.

  Rotational torque generated by the engine 2 and the rotating electrical machine 3 is transmitted to wheels (drive wheels) 6 via a transmission 4 such as a continuously variable transmission or a stepped automatic transmission and a differential gear 5. The rotating electrical machine 3 is mounted between the engine 2 and the transmission 4 or in the transmission 4. Therefore, the rotating electrical machine 3 is required to be small and have high output in order to minimize the influence of space on the vehicle 1.

  FIG. 2 is a cross-sectional view schematically showing the rotating electrical machine 3, in which an upper region across the shaft 201 shows a section of the rotating electrical machine 3 and a lower region shows a side surface of the rotating electrical machine 3. The rotating electrical machine 3 is housed in a case 7 constituted by a front bracket 70, a rear bracket 71, and a housing 72. The case 7 may be an integral type constituted by the front bracket 70 and the housing 72 or an integral type constituted by the rear bracket 71 and the housing 72. When the rotating electrical machine 3 is disposed between the engine 2 and the transmission 4 as shown in FIG. 1, the case 7 is configured using the case of the engine 2 or the case of the transmission 4. There is also. When the rotating electrical machine 3 is mounted in the transmission 4, the case 7 may be configured using the case of the transmission 4.

  The rotating electrical machine 3 includes a stator 100 and a rotor 200. The outer periphery of the stator 100 is fixed to the inner periphery of the housing 72. The rotor 200 is arranged on the inner peripheral side of the stator 100 with a slight gap between the rotor 200 and the stator 100. The rotor 200 is fixed to a shaft 201 that is a rotating shaft, and rotates together with the shaft 201. Both ends of the shaft 201 are rotatably supported by the front bracket 70 and the rear bracket 71 by bearings 202a and 202b.

  FIG. 3 is a perspective view showing the appearance of the stator of the rotating electrical machine. The stator 100 includes a stator core 101 and a stator winding 103. The stator core 101 includes a plurality of slots 105 arranged in the circumferential direction. The stator winding 103 is composed of a group of coil conductors 102 a to 102 d (see FIG. 4) and is accommodated in the stator core 101. The slots 105 are arranged on the inner peripheral surface of the stator core 101 at equal intervals with a predetermined pitch, and are formed so as to penetrate from one end of the stator core 101 in the axial direction to the other end. On the inner peripheral surface of the stator core 101, a slit portion 108 is formed that communicates each slot 105 and an internal space surrounded by the stator core 101.

  Stator core 101 is made of a laminated steel plate formed by laminating electromagnetic steel plates. Each slot 105 accommodates a stator winding 103 and insulating paper that electrically insulates between the stator core 101 and the stator winding 103. Although not shown, the stator winding 103 has, for example, three-phase winding ends connected by a star connection. A U-phase, V-phase, and W-phase AC current flows through the stator winding 103, and the rotating electrical machine 3 operates as at least one of an electric motor and a generator.

  FIG. 4 is a view showing a coil conductor of the stator winding housed in the stator of the rotating electrical machine. The stator winding 103 is composed of a group of coil conductors 102a to 102d each formed in a U shape as a whole for each phase. FIG. 4 shows the coil conductors 102a to 102d in a state in which one end of the linear tip portion (U-shaped open end) is twisted (bent) in the circumferential direction and electrically joined by welding or the like. Yes. A plurality of coil conductors 102a are arranged on the innermost peripheral side of the stator core 101 (this is the first layer). A plurality of coil conductors 102b, coil conductors 102c, and coil conductors 102d are arranged in this order from the coil conductor 102a (first layer) toward the outer side in the radial direction with respect to the stator core 101. From the innermost peripheral side of the stator core 101 toward the radially outer side, the first coil conductor 102a is the first layer, the second coil conductor 102b is the second layer, and the third The coil conductor 102c located at the third layer is the third layer, and the fourth coil conductor 102d is the fourth layer.

  The plurality of coil conductors 102a to 102d are electrically joined by welding or the like with the straight tip portions twisted (bent) in the circumferential direction. For example, the coil conductor 102a and the coil conductor 102c are twisted in the circumferential direction counterclockwise, the coil conductor 102b and the coil conductor 102d are twisted in the circumferential direction clockwise, and the coil conductor 102a and the coil conductor 102b are joined. The coil conductor 102c and the coil conductor 102d are joined. In this embodiment, as shown in FIG. 4, each of the coil conductors 102a to 102d (first layer to fourth layer) has a twist length (a circumferential length generated by twisting) L. Suppose they are the same.

  The stator manufacturing apparatus for a rotating electrical machine according to the present embodiment can simultaneously twist a plurality of coil conductors 102a to 102d in the circumferential direction. The stator manufacturing apparatus according to the present embodiment includes a circumferential rotation unit that holds the tip portions of the coil conductors 102a to 102d, and a rotation drive unit that rotates the circumferential rotation unit in the circumferential direction. The circumferential rotation part is a ring-shaped member, and includes a plurality of grooves for holding the coil conductors 102a to 102d at one end in the central axis direction (direction perpendicular to the plane including the circumferential direction of the ring). A plurality of convex portions are provided at the other end. A rotation drive part is a column-shaped member, and equips an outer peripheral surface (side surface) with the several groove part which can mesh with the convex part of the circumferential direction rotation part. When the rotation drive unit installed so as to straddle the circumferential rotation unit rotates in its circumferential direction, the circumferential rotation unit rotates in the circumferential direction, and the coil conductors 102a to 102d held in the grooves of the circumferential rotation unit The tip is twisted.

  FIG. 5 is an exploded view showing the configuration of the circumferential rotating portion of the stator manufacturing apparatus for a rotating electrical machine according to this embodiment. FIG. 5 also shows the stator core 101 and coil conductors 102a to 102d before twisting.

  The circumferential direction rotation part 110 is ring-shaped and includes four twisting jigs 111a to 111d. The number of twisting jigs 111a to 111d is the same as the number of layers of the coil conductors 102a to 102d. The twisting jigs 111a to 111d are ring-shaped members and can be disposed on the coil conductors 102a to 102d, respectively. The twisting jig 111a is a jig for twisting the plurality of coil conductors 102a in the first layer. The twisting jig 111b is a jig for twisting the plurality of coil conductors 102b in the second layer. The twisting jig 111c is a jig for twisting the plurality of coil conductors 102c in the third layer. The twisting jig 111d is a jig for twisting the plurality of coil conductors 102d in the fourth layer. The twisting jigs 111a to 111d are arranged concentrically in accordance with the positions of the coil conductors 102a to 102d. That is, the diameters of the twisting jigs 111a to 111d increase in this order, the twisting jig 111a is arranged on the innermost peripheral side, and the twisting jig 111b, the twisting jig 111c, and the twisting jig 111d are twisted. It arrange | positions in this order toward the radial direction outer side from the tool 111a.

  In the following, from the innermost peripheral side of the circumferential rotating portion 110 to the outer side in the radial direction, the first twist jig 111a is the first layer, the second twist jig 111b is the second layer, The third twisting jig 111c is called the third layer, and the fourth twisting jig 111d is called the fourth layer. Accordingly, the twisting jigs 111a to 111d are also referred to as first to fourth layers from the innermost circumferential side to the outer side in the radial direction, like the coil conductors 102a to 102d.

  The twisting jigs 111a to 111d are members independent from each other, can be individually disposed on the coil conductors 102a to 102d, and can be individually rotated in the circumferential direction.

  The ring-shaped twisting jigs 111a to 111d include a plurality of grooves 112 that can hold the tip portions of the coil conductors 102a to 102d, respectively, at one end in the central axis direction. A plurality of groove portions 112 are provided along the circumferential direction of the twisting jigs 111a to 111d, and the tip portions of the coil conductors 102a to 102d can be fitted therein. The tip portions of the coil conductors 102a to 102d are linear before twisting as shown in FIG.

  Furthermore, the twisting jigs 111a to 111d include a plurality of convex portions 113 at the other end in the central axis direction. A plurality of protrusions 113 are provided along the circumferential direction of the twisting jigs 111a to 111d, protrude in the central axis direction of the twisting jigs 111a to 111d, and are located at half the circumferential direction of the twisting jigs 111a to 111d (the ring It is provided only at the position of half circumference. The height (projection length) of the convex portion 113 can be arbitrarily determined so as to mesh with a groove portion of a rotation driving portion described later. In addition, as shown in FIG. 5, it does not mesh with the groove part of the rotational drive part mentioned later in the other half position (position of the half periphery where the convex part 113 is not provided) of the circumferential direction of the twist jigs 111a-111d. There may be such a low convex part.

  When the twisting jigs 111a to 111d are arranged on the coil conductors 102a to 102d, the positions of the convex portions 113 are set as follows. That is, the twisting jigs 111a to 111d are arranged on the coil conductors 102a to 102d so that the convex portion 113 in the odd layer faces the convex portion 113 in the even layer with the central axis (rotary axis of the rotating electrical machine) interposed therebetween. To do. In the example shown in FIG. 5, the convex portion 113 of the twisting jig 111a (first layer) and the twisting jig 111c (third layer) is located on one half of the circumferential rotation part 110 (on the right side in FIG. 5). The convex portion 113 of the twisting jig 111b (second layer) and the twisting jig 111d (fourth layer) is located on the other half (left side in FIG. 5) of the circumferential rotation part 110.

  Thus, the convex portions 113 of the odd-numbered twisting jigs 111a and 111c are located on one half-circumferential portion of the circumferential rotating portion 110, and the convex portions 113 of the even-numbered twisting jigs 111b and 111d are circumferentially rotating portions. 110, the odd-numbered twisting jigs 111a and 111c and the even-numbered twisting jigs 111b and 111d are arranged so as to face each other across the rotating shaft of the rotating electrical machine. Moreover, the circumferential direction rotation part 110 is arrange | positioned at the coil conductors 102a-102d, and hold | maintains the coil conductors 102a-102d.

  In the state in which the circumferential direction rotating part 110 (twisting jigs 111a to 111d) holds the coil conductors 102a to 102d, the central axis direction and the circumferential direction of the circumferential direction rotating part 110 and the twisting jigs 111a to 111d The axial direction and the circumferential direction (the direction along the rotation axis direction and the rotation direction of the rotating electrical machine) are the same.

  FIG. 6 is a diagram illustrating a configuration of a rotation driving unit of the stator manufacturing apparatus for a rotating electrical machine according to the present embodiment. FIG. 6 also shows the circumferential rotating portion 110, the stator core 101, and coil conductors 102a to 102d before twisting. The circumferential rotation part 110 holds the tip portions of the coil conductors 102a to 102d.

  The rotation drive unit 120 is a columnar member, and includes a plurality of grooves 121a to 121d on one side surface and the other side surface in the length direction. A plurality of grooves 121 a to 121 d are provided along the circumferential direction of the rotation driving unit 120, and each of the grooves 121 a to 121 d can mesh with the projections 113 of the twisting jigs 111 a to 111 d of the circumferential rotation unit 110. The rotation drive unit 120 is spanned between a part in the circumferential direction of the circumferential direction rotation part 110 and a part facing this part across the central axis of the circumferential direction rotation part 110. It is installed in the circumferential direction rotation unit 110 so as to straddle the rotation unit 110. That is, the rotation driving unit 120 has a circumferential direction rotation unit 110 such that its length direction (the center axis direction) is perpendicular to the center axis direction of the circumferential direction rotation unit 110 (twisting jigs 111a to 111d). Can be installed. Therefore, in a state where the twisting jigs 111a to 111d hold the coil conductors 102a to 102d, the rotation driving unit 120 is installed in the circumferential rotation unit 110 so that the length direction thereof is perpendicular to the axial direction. .

  The groove 121a meshes with the convex 113 of the twisting jig 111a (first layer). The groove 121b meshes with the convex 113 of the twisting jig 111b (second layer). The groove 121c meshes with the convex 113 of the twisting jig 111c (third layer). The groove part 121d meshes with the convex part 113 of the twisting jig 111d (fourth layer). The rotation drive unit 120 is installed in the circumferential direction rotation unit 110 such that the groove portions 121a to 121d mesh with the convex portions 113 of the twisting jigs 111a to 111d in this way. The positions of the grooves 121a to 121d are determined so that the grooves 121a to 121d can mesh with the convex portions 113 of the twisting jigs 111a to 111d when the rotation driving unit 120 is installed in the circumferential direction rotation unit 110, respectively. The depth of the groove portions 121a to 121d can be arbitrarily determined according to the protruding length of the convex portion 113 of the twisting jigs 111a to 111d.

  As described above, in the circumferential rotating portion 110, the convex portions 113 of the odd-numbered twisting jigs 111a and 111c are located in one half-circumferential portion, and the convex portions 113 of the even-numbered twisting jigs 111b and 111d are the other. Located in the half circle. Accordingly, the rotation drive unit 120 includes grooves 121a and 121c that mesh with the convex portions 113 of the twisting jigs 111a and 111c of the odd-numbered layers (the first layer and the third layer) on one end side in the length direction. Are provided with groove portions 121b and 121d that mesh with the convex portions 113 of the twisting jigs 111b and 111d of even-numbered layers (second layer and fourth layer). That is, the rotation drive unit 120 installed in the circumferential direction rotation unit 110 includes groove portions 121a and 121c on one side in the length direction across the central axis of the circumferential direction rotation unit 110, and groove portions 121b and 121d on the other side. Is provided.

  The columnar rotation drive unit 120 is connected to a drive unit such as a motor or an actuator, and can rotate in its circumferential direction (that is, with a direction perpendicular to the axial direction as a rotation axis). When the rotation driving unit 120 rotates in its circumferential direction, the projections 113 of the twisting jigs 111a to 111d are engaged with the grooves 121a to 121d, so that the twisting jigs 111a to 111d, that is, the circumferential rotation part 110 is moved in the circumferential direction. Rotate.

  However, the convex portions 113 of the odd-numbered twisting jigs 111a and 111c are located on one half of the circumferential rotation portion 110, and the convex portions 113 of the even-numbered twisting jigs 111b and 111d are the circumferential rotation portions. Since it is located in the other half circumference part of 110, the rotation directions of twisting jigs 111a and 111c and twisting jigs 111b and 111d are opposite to each other. For example, as shown in FIG. 6, when the rotation driving unit 120 rotates in the circumferential direction in the direction of arrow A, the twisting jigs 111 a and 111 c are in the direction of arrow B due to the engagement between the grooves 121 a and 121 c and the projection 113. Rotate in the circumferential direction (counterclockwise), and the twisting jigs 111b and 111d rotate in the direction of arrow C (clockwise) in the circumferential direction due to the engagement between the grooves 121b and 121d and the protrusion 113.

  As described above, when the rotation driving unit 120 rotates in its circumferential direction, one end side in the length direction rotates the odd-numbered twisting jigs 111a and 111c of the circumferential rotation unit 110 in the circumferential direction. The other end side rotates the even-numbered twisting jigs 111b and 111d of the circumferential rotating part 110 in the circumferential direction, and the rotational directions of the twisting jigs 111a and 111c and the rotational directions of the twisting jigs 111b and 111d are opposite to each other. . Since the rotation directions of the twisting jigs 111a and 111c and the twisting jigs 111b and 111d are opposite to each other, the coil conductors 102a and 102c held by the twisting jigs 111a and 111c and the twisting jigs 111b and 111d are held. The coil conductors 102b and 102d are opposite in twisting (bending) direction. In the example shown in FIG. 6, the twisting jigs 111a and 111c rotate counterclockwise in the direction of the arrow B, and the twisting jigs 111b and 111d rotate clockwise in the direction of the arrow C. 102c is twisted counterclockwise in the direction of arrow B, and coil conductors 102b and 102d are twisted clockwise in the direction of arrow C.

  In the stator manufacturing apparatus according to the present embodiment, the tip portions of the coil conductors 102a to 102d can be twisted in the circumferential direction as shown in FIG. An appropriate rotation angle of the rotation drive unit 120 in the circumferential direction for twisting the coil conductors 102a to 102d in the circumferential direction (that is, a rotation angle in the circumferential direction of the circumferential rotation unit 110) is determined in advance by an experiment or the like. Let's ask for it. Moreover, what is necessary is just to change the rotation direction of the rotation drive part 120 to a reverse direction, when changing the direction of twist of the front-end | tip part of coil conductor 102a-102d to a reverse direction.

  Note that the number of the groove portions 121a to 121d of the rotation driving unit 120 may be equal to the number of the convex portions 113 of the twisting jigs 111a to 111d, or may be larger than the number of the convex portions 113. That is, not all the groove portions 121a to 121d need to mesh with the convex portion 113, and there may be groove portions 121a to 121d that do not mesh with the convex portion 113 (the convex portion 113 does not enter).

  As described above, the stator manufacturing apparatus according to the present embodiment includes the circumferential rotation unit 110 and the rotation driving unit 120, and can simultaneously twist the plurality of coil conductors 102a to 102d with a simple structure. No control is required. Moreover, the direction of twisting of the coil conductors 102a to 102d can be easily changed.

  In the embodiment described above, as shown in FIG. 4, the coil conductors 102a to 102d (the first layer to the fourth layer) have a twist length (a circumferential length caused by twisting (bending)). All of L are the same. In the stator manufacturing apparatus according to the present invention, the twist length L of the coil conductors 102a to 102d can be changed depending on the layer. By changing the interval (pitch) of the convex portions 113 provided on the twisting jigs 111a to 111d of the circumferential rotation part 110 by the twisting jigs 111a to 111d, the length L of twisting by the first layer to the fourth layer. Can be changed. However, the interval between the convex portions 113 needs to be set so that the length L of the twist of the coil conductors can be such that the coil conductors to be joined can be joined. That is, it is necessary to set the interval between the convex portions 113 so that the coil conductor 102a and the coil conductor 102b can be joined and the coil conductor 102c and the coil conductor 102d can be joined. Further, the groove portions 121 a to 121 d of the rotation driving unit 120 are provided in accordance with the position of the convex portion 113 so as to be able to mesh with the convex portion 113. As described above, the number of the groove portions 121a to 121d of the rotation driving unit 120 may be equal to the number of the convex portions 113 of the twisting jigs 111a to 111d, or may be larger than the number of the convex portions 113.

  FIG. 7 is a diagram showing coil conductors having different twist lengths depending on layers. In the example shown in FIG. 7, the twist length L2 of the coil conductors 102b and 102d (second layer, fourth layer) is equal to the twist length L1 of the coil conductors 102a, 102c (first layer, third layer). Shorter than.

  FIG. 8 is an exploded view showing a configuration of a circumferential rotating portion in which the interval between the convex portions differs depending on the twisting jig. FIG. 8 also shows the stator core 101 and coil conductors 102a to 102d before twisting.

  In the example shown in FIG. 8, the interval between the convex portions 113 provided on the twisting jigs 111b and 111d of the circumferential rotating portion 110 is larger than the interval between the convex portions 113 provided on the twisting jigs 111a and 111c. large. That is, the number of convex portions 113 provided on the twisting jigs 111b and 111d is smaller than the number of convex portions 113 provided on the twisting jigs 111a and 111c.

  Therefore, in the second layer and the fourth layer, the number of meshes between the convex portions 113 of the twisting jigs 111a to 111d and the groove portions 121a to 121d of the rotation driving unit 120 is smaller than in the first layer and the third layer. The two-layer and fourth-layer twisting jigs 111b and 111d have a smaller rotation angle in the circumferential direction (that is, the twist length) than the first-layer and third-layer twisting jigs 111a and 111c. Therefore, the twist length L2 of the second and fourth layer coil conductors 102b and 102d is shorter than the twist length L1 of the first and third layer coil conductors 102a and 102c.

  As described above, the interval between the convex portions 113 of the twisting jigs 111a to 111d of the circumferential direction rotating unit 110 may be different depending on the twisting jigs 111a to 111d. When the interval between the convex portions 113 is changed by the twisting jigs 111a to 111d, the twist length L of the coil conductors 102a to 102d can be changed for each layer. When the twist length L of the coil conductors 102a to 102d is different for each layer, it becomes easy to join the coil conductor 102a and the coil conductor 102b and to join the coil conductor 102c and the coil conductor 102d by welding or the like. Sometimes. That is, the welding positions of the coil conductors 102a to 102d are shifted in the circumferential direction by the layers so that the welding positions do not become the same position in the circumferential direction, thereby facilitating welding and improving the productivity of the stator. it can. Therefore, the interval between the convex portions 113 can be arbitrarily determined according to the manufacturing conditions and conditions.

  The stator manufacturing apparatus according to the present invention can twist a plurality of coil conductors of all layers simultaneously with a simple structure even when there are a plurality of coil conductor layers. In the present embodiment, an example in which the coil conductor has four layers is shown, but the coil conductor may have an arbitrary plurality of layers, for example, eight layers. However, the number of twisting jigs in the circumferential rotation unit 110 needs to match the number of layers of the coil conductor, and the groove of the rotation driving unit 120 is the convex 113 of the twisting jig in each layer of the circumferential rotation unit 110. It is necessary to provide so that it may mesh with.

  In addition, this invention is not limited to said Example, A various deformation | transformation is possible. For example, the above-described embodiments are described in detail for easy understanding of the present invention, and the present invention is not necessarily limited to an aspect including all the configurations described. In addition, a part of the configuration of a certain embodiment can be replaced with the configuration of another embodiment. It is also possible to add the configuration of another embodiment to the configuration of one embodiment. In addition, it is possible to delete a part of the configuration of each embodiment or to add or replace another configuration.

  DESCRIPTION OF SYMBOLS 1 ... Vehicle, 2 ... Engine, 3 ... Electric rotating machine, 4 ... Transmission, 5 ... Differential gear, 6 ... Wheel, 7 ... Case, 70 ... Front bracket, 71 ... Rear bracket, 72 ... Housing, 100 ... Stator, DESCRIPTION OF SYMBOLS 101 ... Stator core, 102a-102d ... Coil conductor, 103 ... Stator winding, 105 ... Slot, 108 ... Slit part, 110 ... Circumferential rotation part, 111a-111d ... Twist jig, 112 ... Groove part, 113 ... Projection part, 120... Rotation drive part, 121a to 121d... Groove part, 200... Rotor, 201.

Claims (4)

The tip portion of the stator winding that is ring-shaped and can hold the tip portion of the stator winding housed in the stator core of the stator of the rotating electric machine and rotates in its circumferential direction A circumferential rotating part capable of twisting
A rotation drive unit that is cylindrical and can be installed in the circumferential rotation unit such that its length direction is perpendicular to the central axis direction of the circumferential rotation unit, and can rotate in its circumferential direction;
With
The circumferential rotation part includes a plurality of twisting jigs arranged in a ring shape and concentrically,
Each of the plurality of twisting jigs includes a plurality of grooves that can hold the tip portion of the stator winding, and can rotate in its circumferential direction.
When the rotation drive unit rotates in its circumferential direction, one end side in the length direction rotates the odd-numbered twisting jig from the innermost circumferential side of the circumferential direction rotation unit toward the outer side in the radial direction, The other end side in the length direction rotates the even-numbered twisting jig from the innermost circumferential side of the circumferential-direction rotating part toward the outer side in the radial direction, and the rotation direction of the odd-numbered twisting jig and the The rotation directions of the even-numbered twisting jigs are opposite to each other.
An apparatus for manufacturing a stator of a rotating electrical machine. The plurality of twisting jigs include a plurality of groove portions at one end in the central axis direction of the circumferential rotation portion, and a plurality of convex portions at the other end in the central axis direction of the circumferential rotation portion,
The rotational drive unit includes a plurality of groove portions that can mesh with the convex portion of the twisting jig on the side surface on the one end side in the length direction and the side surface on the other end side in the length direction,
Of the plurality of groove portions of the rotational drive portion, the groove portion that can mesh with the convex portion of the odd-numbered twisting jig is provided on the one end side in the length direction of the rotational drive portion, The groove part that can mesh with the convex part of the even-numbered twisting jig is provided on the other end side in the length direction of the rotation drive part,
The stator manufacturing apparatus for a rotating electrical machine according to claim 1. The plurality of twisting jigs include the plurality of convex portions at a position of a half circumference of the twisting jig,
The stator manufacturing apparatus for a rotating electrical machine according to claim 2. The plurality of twisting jigs have different intervals between the convex portions depending on the twisting jigs.
The stator manufacturing apparatus for a rotating electrical machine according to claim 2.

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