JP2007267535A - Rotary electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary electric machine capable of suppressing the movement of lead-out wires of an armature coil when the armature coil and a wire connection board are sealed with a resin. <P>SOLUTION: The rotary electric machine comprises a stator 10 wherein the armature coil 3 is provided on a stator core 1, a rotor 20 rotatably arranged in the stator 10, an insulation guide member 50 provided in the axial direction end part of the stator 10 and having a guide part 51 for guiding the lead-out wires 14 of the armature coil 3 to prevent the lead-out wires from moving to the stator inner periphery or outer periphery, the wire connection board 60 to which the lead-out wires 14 of the armature coil 3 guided by the insulation guide member 50, and the sealing resin 15 formed around the armature coil 3 and the wire connection board 60. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a structure of a rotating electric machine and relates to a technique for suppressing movement of an armature coil lead wire during resin sealing.

  In conventional rotating electrical machines, when the armature coil and its connecting part are sealed with resin to improve environmental resistance and heat dissipation, the armature coil lead wire moves from a predetermined position due to the pressure of the resin flow during molding. In order to prevent exposure from the resin surface, the following method has been adopted.

  For example, in Patent Document 1, in a three-phase drive brushless motor including a stator and a rotor that is rotatably attached to the stator, a stator winding is applied to an insulating frame that covers a stator core provided in the stator. At the same time, the conductive pin protrudes from the insulating frame, the lead wire of the stator winding is wound around the conductive pin, the conductive pin is inserted into the conductive pin insertion hole of the motor circuit board, and soldered to the circuit land portion. The electrical connection was taken.

  Further, for example, in Patent Document 2, in a stator of a slotless motor in which an air-core coil is provided on the inner peripheral surface of a stator core having no slots, a stretchable mesh shape in which resin or adhesive is applied to a fibrous body. In addition, after the protective layer formed in a cylindrical shape is inserted so as to cover the inner peripheral surface of the coil, it is adhesively cured.

Japanese Patent Laid-Open No. 5-236692 (Claim 1, FIG. 1) JP 2002-101591 A (Claim 1, FIG. 1)

  However, the technique described in Patent Document 1 requires a space for projecting the conductive pin on the insulating frame, and it is difficult to secure the space in a small motor having a rated capacity of about several watts. Moreover, when a flat electric wire is employ | adopted as a coil wire material, the problem that it is hard to get entangled with a conductive pin arises.

  Moreover, in the technique described in Patent Document 2, the process for stretching the fiber body around the inner circumference of the stator is complicated, and the time required for assembly becomes long, for example, the time for curing the adhesion is required. There is.

  This invention was made to solve the above problems, and in a small electric motor of about several watts where it is difficult to secure a space for standing a conductive pin, and a rotating electric machine that employs a flat electric wire, It is an object of the present invention to provide a rotating electrical machine that can suppress the movement of the armature coil lead wire during resin sealing of the armature coil and the wiring board without complicating the assembly process.

  The rotating electrical machine according to the present invention is disposed at a stator in which an armature coil is disposed on a stator core, a rotor disposed rotatably with respect to the stator, and an axial end portion of the stator, Connection for connecting the lead wire of the armature coil guided by the insulating guide member and the insulating guide member having a guide portion for guiding the lead wire of the armature coil and preventing movement in the inner or outer peripheral direction of the stator A substrate and a sealing resin formed around the armature coil and the wiring substrate are provided.

  According to the rotating electric machine of the present invention, the armature coil includes the insulating guide member having the guide portion that prevents the lead wire of the armature coil from moving in the inner peripheral direction or the outer peripheral direction of the stator, and the armature coil guided by the insulating guide member is provided. Since the lead wire is connected to the connection board, the lead wire of the armature coil moves to the inner peripheral side or the outer peripheral side by the pressure of the resin flow in the process of resin-sealing the periphery of the armature coil and the connection board. It is possible to prevent the lead wire from being exposed on the surface of the stator after the resin is cured.

  In addition, even in small electric motors of several watts, where it is difficult to secure a space for standing conductive pins, and in rotating electrical machines that employ flat wires, the armature coil can be pulled out during resin sealing without complicating the assembly process. The movement of the line can be suppressed.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

Embodiment 1 FIG.
1 is a longitudinal sectional view showing the structure of a rotating electrical machine according to Embodiment 1 of the present invention, and FIG. 2 is a sectional view taken along line II-II in FIG. In FIG. 2, the rotor 20 of FIG. 1 is omitted.

  A rotating electrical machine 100 according to the present embodiment is arranged at a predetermined interval in the circumferential direction of an outer peripheral surface attached to a rotor 10 and a stator 10 having an armature coil 3 on the inner peripheral side of a substantially cylindrical stator core 1. The rotor 20 having the magnet 7 is provided. The rotating electrical machine 100 includes a frame 4 and a bracket 5, and the rotor shaft 6 is rotatably supported by bearings 8 and 9 provided on the frame 4 and the bracket 5.

  The armature coil 3 is formed in an arc shape so as to follow the inner peripheral surface shape of the stator core 1. The armature coil 3 shown in the present embodiment (FIGS. 1 and 2) has an air-core (slotless) structure, and a bobbin 30 is disposed at the winding center of the armature coil 3. . In addition, in order to ensure insulation between the stator core 1 and the armature coil 3, an insulating sheet 2 (for example, a double-sided tape made of polyester film) is disposed between the stator core 1 and the armature coil 3. Yes. Further, in order to improve the insulation and heat dissipation of the armature coil 3, the periphery of the armature coil 3 and the wiring board 60 described later is sealed and formed with a resin 15 such as an epoxy system having high insulation and heat dissipation. Yes.

  In the present embodiment, an insulating guide member 50 for guiding a lead wire (not shown) of the armature coil 3 is provided at the axial end of the stator 10, and the armature coil is adjacent to the insulating guide member 50. A connection board 60 to which three lead wires are connected is provided.

  3 and 4 are a front view and a perspective view of the insulating guide member 50 according to the present embodiment.

  As shown in FIGS. 3 and 4, the insulating guide member 50 of the present embodiment has a ring shape that follows the shape of the substantially cylindrical stator core 1. The insulating guide member 50 includes a hook-shaped guide portion 51 on the inner peripheral portion of the ring, and is configured to guide the lead wire 14 of the armature coil 3 through a guide hole 52 formed by the guide portion 51. ing. The guide portion 51 of the insulating guide member 50 has an opening 53 that opens in the circumferential direction.

  FIG. 5 is a perspective view showing a situation immediately before the armature coil lead wire is connected to the connection board when the insulating guide member 50 of the present embodiment is used. As shown in FIG. 5, after the stator 10 composed of the stator core 1 and the armature coil 3 is mounted on the frame 4, the lead wire 14 of the armature coil 3 is connected to the hook-shaped guide portion of the insulating guide member 50. 51 is introduced into the guide hole 52 through the opening 53 near the tip. Then, the tip end portion of the lead wire 14 of the armature coil 3 is soldered to the land portion 61 of the connection board 60. Thereafter, the surroundings of the armature coil 3 and the wiring board 60 are sealed with an epoxy resin 15 having high insulation and heat dissipation.

  As described above, according to the present embodiment, since the insulating guide member 50 having the guide portion 51 for guiding the lead wire 14 of the armature coil 3 is provided, the following effects can be obtained. That is, in the step of resin-sealing the periphery of the armature coil 3 and the connection board 60, the armature coil 3 is the place where the lead wire 14 of the armature coil 3 is about to be pushed out to the inner peripheral side by the pressure of the resin flow. This can be prevented by the guide portion 51 existing on the inner peripheral side of the lead wire 14, and the exposure of the lead wire 14 to the inner peripheral surface of the stator 10 after the resin is cured can be suppressed. .

  Next, the direction of the opening 53 that opens in the circumferential direction of the insulating guide member 50 will be described. FIG. 6 is a view of the stator of the rotating electrical machine of the present embodiment as viewed from the rotating shaft side, and FIG. 7 is a cross-sectional view of the armature coil of FIG. 6 taken along line VII-VII. As shown in FIGS. 6 and 7, when an alpha winding coil having two layers using a rectangular wire is used as the armature coil 3, the two lead wires 14 coming out of the armature coil 3 are drawn from the coil center line 3a. The distance between the two lead wires 14 tends to spread outward in the circumferential direction due to the influence of the spring back. Therefore, in the present embodiment, the opening 53 opens toward the center line 3 a of the armature coil 3 in the pair of guide portions 51 that respectively accommodate the two lead wires 14 that come out of the armature coil 3. I did it. For this reason, even if a springback force is applied to the lead wire 14 of the armature coil 3, there is no fear of coming off from the guide portion 51, and the workability of attaching the solder 62 to the connection board 60 is improved.

Embodiment 2. FIG.
In the first embodiment, the opening 53 of the pair of guide portions 51 of the insulating guide member 50 is directed to the center line 3 a of the armature coil 3. In the present embodiment, as shown in FIGS. 8 to 9, the direction of the opening 53 of the guide portion 51 of the insulating guide member 50 is unified to one direction of the rotation direction of the rotor. 8 and 9 are a plan view and a perspective view showing an insulating guide member according to the second embodiment.

  As described above, when the direction of the opening 53 of the guide portion 51 of the insulating guide member 50 is unified to one of the rotation directions of the rotor, the guide work and the connection work of the lead wire 14 of the armature coil 3 are performed. It can be simplified. That is, before the insulating guide member 50 is attached to the stator core, the lead wire 14 of the armature coil 3 is erected in the rotor axial direction in advance. Then, as shown in FIG. 10, the insulating guide member 50 is placed on the stator core in such a positional relationship that the lead wire 14 is coaxial with the stator central axis and outside the opening 53 of the guide portion 51. Thereafter, the insulating guide member 50 is rotated in the direction of the arrow in FIG. 10 to obtain the state in FIG. By this operation, the lead wires 14 of the plurality of armature coils 3 can be introduced into the guide hole 52 of the insulating guide member 50 by one operation, which can contribute to shortening the time of the guide operation and the connection operation.

Embodiment 3 FIG.
In the present embodiment, as shown in FIGS. 12 and 13, the thickness of the tip of the hook-shaped guide portion 51 of the insulating guide member 50 is made thicker than the thickness of the other guide portions, and the width of the opening 53 is increased. Is made narrower than the width of the guide portion 51 (guide hole 52). By adopting such a configuration, even when the lead wire 14 is pulled during the soldering operation of the lead wire 14 of the armature coil 3 to the connection board 60, the lead wire 14 is pulled from the guide hole 52 of the guide portion 51. It can be prevented from coming off and workability is improved.

Embodiment 4 FIG.
14 and 15 are a plan view and a perspective view showing an insulating guide member according to Embodiment 4 of the present invention. The insulating guide member 50 of the present embodiment has a ring shape that follows the shape of the substantially cylindrical stator core 1 and includes a guide portion 55 that is formed in an annular shape toward the inner periphery of the ring. Yes. The lead wire 14 of the armature coil 3 is guided by the guide hole 56 formed by the guide portion 55. The guide portion 55 of the insulating guide member 50 has an opening 57 that opens in the outer direction of the rotation shaft.

  As described above, according to the present embodiment, the lead wire 14 of the armature coil 3 is guided by the guide hole 56 formed by the annular guide portion 55, and the guide portion 55 extends outward from the rotation axis. Since the opening 57 is provided, the workability at the time of introducing the lead wire 14 of the armature coil 3 to the insulating guide member 50 is improved. That is, before the insulation guide member 50 is attached to the stator core 1, the lead wires 14 of the armature coil 3 are spread radially in advance radially outward of the stator core 1 as shown in FIG. . Then, as shown in FIG. 17, the insulating guide member 50 is placed so that it is coaxial with the central axis of the stator core 1 and the positions of the guide portion 55 and the lead wire 14 are aligned. Finally, as shown in FIG. 18, the lead wire 14 of the armature coil 3 can be introduced into the guide portion 55 by raising the lead wire 14 of the armature coil 3 in the axial direction. Since such an operation is mainly performed on the outer side in the radial direction of the stator, in the case of a rotating electric machine having a small stator inner diameter, compared to the case where the opening is on the inner peripheral side of the insulating guide member, the lead-out to the guide unit is performed. The introduction work of the wire becomes easy and can contribute to shortening of the work time.

  19 and 20 are a plan view and a perspective view showing another example of an insulating guide member according to Embodiment 4 of the present invention. In the insulating guide member 50 shown in FIG. 19 and FIG. 20, the width (center angle W1) of the opening 57 that opens to the outside of the rotation axis of the guide portion 55 is the width of the guide hole 56 formed by the guide portion 55 It is smaller than the central angle W0). By adopting such a configuration, even if a molding pressure is applied at the time of resin sealing, the lead wire 14 of the armature coil 3 is unlikely to come off from the guide portion 55 to the outer peripheral side of the rotating shaft. A ground fault due to contact of the stator core 1 can be suppressed.

Embodiment 5 FIG.
21 and 22 are a plan view and a perspective view showing an insulating guide member according to Embodiment 5 of the present invention. FIG. 23 is a longitudinal sectional view showing a structure of a stator to which an insulating guide member according to Embodiment 5 of the present invention is attached. An insulating plate 58 is attached to the insulating guide member 50 of the present embodiment so that the lead wire 14 of the armature coil 3 does not contact the stator core 1. Since other configurations are the same as those of the first embodiment, description thereof is omitted.

  As described above, according to the present embodiment, the insulating guide member 50 is provided with the insulating plate 58 for preventing contact between the lead wire 14 of the armature coil 3 and the stator core 1. Even if a molding pressure is applied at the time of sealing, a ground fault due to contact between the lead wire 14 of the armature coil 3 and the stator core 1 can be suppressed.

Embodiment 6 FIG.
24 and 25 are a plan view and a perspective view showing an insulating guide member according to Embodiment 6 of the present invention. The insulating guide member 50 of the present embodiment has a ring shape that follows the shape of the substantially cylindrical stator core 1 and includes a guide portion 55 that is formed in an annular shape toward the inner periphery of the ring. Yes. The lead wire 14 of the armature coil 3 is guided by the guide hole 56 formed by the guide portion 55. Note that the opening 57 as shown in the fourth embodiment is not provided.

  According to the present embodiment, the workability deteriorates because there is no opening compared to the fourth embodiment, but in the step of resin-sealing the periphery of the armature coil 3 and the wiring board 60, the armature coil 3 The guide wire 55 existing on the inner peripheral side of the lead wire 14 of the armature coil 3 can prevent this lead wire 14 from being pushed out by the pressure of the resin flow, and is fixed after the resin is cured. It is possible to suppress the lead wire 14 from being exposed on the inner peripheral surface of the child 10.

Other embodiments.
In the above-described embodiment, the inner rotor type rotating electric machine in which the stator core 1 has a substantially cylindrical shape and the armature core 3 is disposed on the inner peripheral side thereof has been described. However, the stator core 1 has a substantially columnar shape. The present invention can also be applied to an outer rotor type rotating electrical machine in which the armature core 3 is disposed on the outer peripheral side. In this case, the insulating guide member has a disk shape or a ring shape along the shape of the stator core, and has a shape having a guide portion for guiding the lead wire of the armature coil on the outer peripheral side of the insulating guide member. In this case, the shape of the guide portion described in the first to sixth embodiments can be applied.

It is a longitudinal cross-sectional view which shows the structure of the rotary electric machine by Embodiment 1 of this invention. Sectional drawing of the II-II line of the rotary electric machine of FIG. 1 is shown. It is a front view which shows the insulation guide member of the rotary electric machine by Embodiment 1 of this invention. It is a perspective view which shows the insulation guide member of the rotary electric machine by Embodiment 1 of this invention. It is a perspective view which shows the condition immediately before connecting the lead wire of the armature coil to the connection board | substrate by Embodiment 1 of this invention. It is the figure which looked at the stator of the rotary electric machine of Embodiment 1 of this invention from the rotating shaft side. Sectional drawing of the VII-VII line of the armature coil of FIG. 6 is shown. It is a top view which shows the insulation guide member by Embodiment 2 of this invention. It is a perspective view which shows the insulation guide member by Embodiment 2 of this invention. It is a top view which shows immediately before introducing the lead wire of the armature coil of Embodiment 2 of this invention into an insulation guide member. It is a top view which shows immediately after introducing the lead wire of the armature coil of Embodiment 2 of this invention into the insulation guide member. It is a top view which shows the insulation guide member by Embodiment 3 of this invention. It is a top view which shows the insulation guide member by Embodiment 3 of this invention. It is a top view which shows the insulation guide member by Embodiment 4 of this invention. It is a perspective view which shows the insulation guide member by Embodiment 4 of this invention. It is a perspective view which shows a mode just before putting the insulation guide member by Embodiment 4 of this invention on a stator core. It is a perspective view which shows a mode immediately after mounting the insulation guide member by Embodiment 4 of this invention on the stator core. It is a perspective view which shows a mode that the lead wire of the armature coil was stood after mounting the insulation guide member by Embodiment 4 of this invention on a stator core. It is a top view which shows the other example of the insulation guide member by Embodiment 4 of this invention. It is a perspective view which shows the other example of the insulation guide member by Embodiment 4 of this invention. It is a top view which shows the insulation guide member by Embodiment 5 of this invention. It is a perspective view which shows the insulation guide member by Embodiment 5 of this invention. It is a longitudinal cross-sectional view which shows the structure of the stator which attached the insulation guide member by Embodiment 5 of this invention. It is a top view which shows the insulation guide member by Embodiment 6 of this invention. It is a perspective view which shows the insulation guide member by Embodiment 6 of this invention.

Explanation of symbols

1 stator core, 2 insulation sheet, 3 armature coil, 4 frame,
5 Bracket, 6 Rotor shaft, 7 Magnet, 10 Stator, 14 Lead line,
15 sealing resin, 20 rotor, 50 insulating guide member, 51 guide part,
52 guide holes, 53 openings, 55 guide parts, 56 guide holes, 57 openings,
58 Insulating plate, 60 connection board, 61 land, 100 rotating electrical machine.

Claims (11)

A stator having an armature coil disposed on a stator core;
A rotor arranged rotatably with respect to the stator;
An insulating guide member that is disposed at an axial end of the stator and has a guide portion that guides the lead wire of the armature coil and prevents movement in the inner or outer circumferential direction of the stator;
A connection board to which a lead wire of the armature coil guided by the insulating guide member is connected;
A rotating electrical machine comprising the armature coil and a sealing resin formed around the wiring board. The stator core has a substantially cylindrical shape, the armature core is disposed on an inner peripheral side thereof, the insulating guide member has a ring shape that follows the shape of the stator core, and the guide portion of the insulating guide member 2. The rotating electrical machine according to claim 1, wherein the armature core prevents movement of the lead wire in an inner circumferential direction. The stator core has a substantially cylindrical shape, the armature core is disposed on an outer peripheral side of the stator core, and the guide portion of the insulating guide member prevents movement of the lead wire of the armature core in the outer peripheral direction. The rotating electrical machine according to claim 1, wherein The insulating guide member includes a hook-shaped guide portion, and is configured to guide a lead wire of the armature coil by a guide hole formed by the guide portion. The guide portion has an opening portion that opens in a circumferential direction. The rotating electrical machine according to any one of claims 1 to 3, further comprising: 5. The pair of guide portions that respectively accommodate two lead wires coming out of the armature coil, the opening portions opening toward the center line of the armature coil. The rotating electrical machine described. 5. The rotating electrical machine according to claim 4, wherein the direction of the opening of the guide portion of the insulating guide member is unified in one of the rotation directions of the rotor. 5. The rotating electrical machine according to claim 4, wherein the thickness of the tip of the hook-shaped guide portion of the insulating guide member is thicker than the thickness of the other guide portions. The insulating guide member includes an annular guide portion, and is configured to guide a lead wire of the armature coil by a guide hole formed by the guide portion. The rotating electrical machine according to any one of claims. 9. The rotating electrical machine according to claim 8, wherein the annular guide portion has an opening that opens in an outer direction of the rotation shaft. 10. The rotating electrical machine according to claim 9, wherein the width of the opening portion that opens in the outer direction of the rotation shaft of the guide portion is smaller than the width of the guide hole formed by the guide portion. The insulating guide member for preventing contact between the lead wire of the armature coil and the stator core is attached to the insulating guide member. The rotating electrical machine according to the item.

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