JP2023140721A - Stator for outer rotor type rotating electric machine and assembly method thereof - Google Patents

Abstract

To improve the workability of attaching a connection terminal and reduce costs in a stator for an outer rotor type rotating electric machine in which a coil is wound around each of a plurality of salient poles provided on the outer periphery of a stator core via a bobbin, and a lead wire of the coil and an external conductor are connected to a conductive metal connection terminal disposed on the bobbin at one end in the axial direction and inward in the radial direction of the stator core.SOLUTION: A terminal holder 26 is attached to a bobbin 14, the terminal holder having an insertion hole 30 through which a part of a connection terminal 23 and an external conductor 25 can be inserted, and formed in a member different from the bobbin 14, the terminal holder to which the connection terminal 23 is attached, and an adhesive 37 that fills a space between the connection terminal 23 and the terminal holder 26 while covering a connecting portion of a lead wire 24 and the connection terminal 23 and a connecting portion of the connection terminal 23 and the external conductor 25 in the insertion hole 30 is applied to the terminal holder 26.SELECTED DRAWING: Figure 4

Description

The present invention provides a method in which a coil is wound around a plurality of salient poles provided on the outer periphery of a stator core through a bobbin, and a conductive metal is disposed on the bobbin at one end in the axial direction and inward in the radial direction of the stator core. The present invention relates to an improvement in a stator for an outer rotor type rotating electrical machine in which the lead wire and external conductor of the coil are connected to a connection terminal made of a metal oxide resin, and to an improvement in a method for assembling the stator for an outer rotor type rotating electrical machine.

2. Description of the Related Art A stator for an outer rotor type rotating electric machine in which connection terminals are directly attached to a bobbin is known from Patent Document 1. On the other hand, in order to ensure the electrical insulation of the lead wire from the coil of the connection terminal and the connection part of the external conductor wire, a patent was created in which the coil wound around the stator core via a bobbin is immersed in epoxy resin liquid. It is known from document 2.

Patent No. 4344695 Japanese Patent Application Publication No. 2003-333787

In the stator for an outer rotor type rotating electric machine disclosed in Patent Document 1, the stator core with the coil wound thereon via the bobbin is large and heavy, and when attaching the connection terminals, it is necessary to handle the large and heavy object. It is difficult to say that the workability is excellent because it requires some work. Further, if the insulation structure disclosed in Patent Document 2 is adopted, a device for immersing the entire coil wound around the stator core via a bobbin in an epoxy resin liquid is required, which may lead to an increase in cost.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a stator for an outer rotor type rotating electrical machine and a method for assembling the same, which makes it possible to improve workability in attaching connection terminals and to reduce costs. purpose.

In order to achieve the above object, the present invention provides a method in which a plurality of salient poles provided on the outer periphery of a stator core are each wound with a coil via a bobbin, and the coil is wound on one end of the stator core in the axial direction and on the inner side in the radial direction. In a stator for an outer rotor type rotating electric machine in which the lead wire of the coil and the external conductor are connected to a conductive metal connection terminal arranged on the bobbin, it is possible to partially insert the connection terminal and insert the external conductor. A terminal holder, which is formed in a separate member from the bobbin and has an insertion hole such as A first feature is that an adhesive is applied to the terminal holder so as to cover the connection terminal and the connection portion of the external conducting wire inside the device and fill the gap between the connection terminal and the terminal holder.

Further, in addition to the configuration of the first feature, the present invention provides that the terminal holder is in contact with a mounting plate portion formed on the bobbin, and that one end of the insertion hole is placed on a side opposite to the holder mounting plate portion. an adhesive that integrally has a flat main part of the holder that is open on one side facing the through hole, and surrounds one end opening of the insertion hole and a connecting part of the connecting terminal and the lead wire attached to the terminal holder; A second feature is that a storage portion is formed on the one surface side of the holder main portion to enable filling the connection portion of the connection terminal and the lead wire with the adhesive.

In addition to the configuration of the second feature, the present invention provides that the adhesive storage section is continuous with the one surface of the holder main section in an endless manner defining the outer periphery of the adhesive storage section, and the holder main section A third feature is that the device is formed with a peripheral wall portion integrally projecting from the one surface of the device, and a groove into which a part of the lead wire is inserted is formed at the projecting end of the peripheral wall portion.

In addition to the configuration of the third feature, the present invention provides a configuration in which the connection terminal is connected to a flat plate-shaped portion that comes into contact with the one surface of the holder main portion, and the external conductive wire and to the insertion hole. an insertion portion integrally connected to the plate-shaped portion such that a connection portion with the external conductor is disposed within the insertion hole when the plate-shaped portion is in contact with the one surface while allowing insertion of the plate-shaped portion; The fourth feature is to have the following.

In addition to the configuration of the fourth feature, the present invention provides that the terminal holder is formed with a positioning hole that opens on the one surface of the holder main part, and the connecting terminal is connected to the lead line between the plate-shaped part. a clamping plate part that is integrally connected to the plate-like part so that the end part of the positioning member can be inserted and crimped; and a positioning protrusion that is integrally continuous to the plate-like part so that it can be fitted into the positioning hole. is the fifth feature.

In addition to the configuration of the fifth feature, the present invention provides a leakage prevention structure that prevents the adhesive from the adhesive storage portion from leaking through the inner surface of the insertion hole and the gap between the insertion portions. A sixth feature is that the terminal holder is provided with the terminal holder.

The insertion hole is composed of a through hole drilled in the holder main part, and a cylindrical part coaxially connected to the through hole and having one end integrally connected to the holder main part, and the cylindrical part at least the other end side thereof is formed in a tapered shape that becomes smaller in diameter as it moves away from the holder main part, and the leakage prevention structure is constituted by the other end side small diameter end of the cylindrical part and the outer periphery of the external conductor wire. This is the seventh feature.

In addition to any one of the first to seventh features, the present invention has an eighth feature that the adhesive is an insulating epoxy resin.

Furthermore, the present invention provides a method for assembling a stator for an outer rotor type rotating electric machine according to any one of the first to eighth features, in which the external conductor and the lead wire are connected to the connection terminal. a step of inserting the external conductor into the insertion hole of the terminal holder that is separated from the bobbin; a step of connecting the external conductor that is inserted through the insertion hole to the connection terminal; and a step of connecting the external conductor that is inserted through the insertion hole to the connection terminal. a step of attaching the terminal holder to the bobbin with the coil wound through the bobbin; and attaching the connection terminal to the terminal holder while accommodating the connection portion with the external conductor in the insertion hole. A ninth feature is that the steps of connecting the lead wire to the connecting terminal and applying the adhesive to the terminal holder are sequentially performed.

According to the first feature of the present invention, the connection terminal is attached to the terminal holder, which is a separate member from the bobbin, and the terminal holder is attached to the bobbin, so that the coil is wound through the bobbin. The connecting terminal can be attached without handling the stator core, which is large and heavy, and the workability of attaching the connecting terminal can be improved. In addition, adhesive is applied to the terminal holder to cover the connecting parts of the lead wires and connecting terminals, as well as the connecting parts of the connecting terminals and external conductors in the insertion holes, and to fill in the space between the connecting terminals and the terminal holder. While eliminating the need for a device that immerses the entire coil in adhesive, it is possible to ensure electrical insulation at the connection part of the lead wire and the connection terminal of the external conductor, and it is possible to reduce costs. .

According to the second feature of the present invention, an adhesive reservoir is formed on one surface side of the holder main portion and surrounds the opening at one end of the insertion hole and the connecting portion of the connection terminal and the lead wire. Since the connecting portions of the connecting terminals and the lead wires can be covered with adhesive, leakage of the adhesive can be prevented and the finished shape can be stabilized.

According to the third feature of the present invention, a groove into which a part of the lead wire is inserted is formed in the protruding end of the endless peripheral wall defining the outer periphery of the adhesive reservoir, so that the tip of the lead wire is inserted into the groove. part can be reliably immersed in the adhesive in the adhesive reservoir.

According to the fourth feature of the present invention, when the connecting terminal has its plate-shaped portion in contact with the holder main portion, the insertion portion of the connecting terminal is disposed in the insertion hole, so that the external conductor and the connecting terminal are The connecting portion can be stably held within the insertion hole.

According to the fifth feature of the present invention, the plate-shaped portion of the connection terminal is integrally provided with a clamping plate portion that can clamp the lead wire between the plate-shaped portion and the plate-shaped portion. , it is easy to connect the lead wire to the connection terminal, and the positioning protrusion that fits into the positioning hole formed in the main part of the terminal holder is integrally connected to the plate-like part, so that the terminal It becomes possible to position the connection terminal with respect to the holder and stably hold the connection portion of the external conductor to the insertion portion within the insertion hole.

According to the sixth feature of the present invention, the terminal holder is provided with a leakage prevention structure that prevents the adhesive from leaking, so that the lead wire and the It not only covers the connection part of the connection terminal with adhesive, but also covers the connection part of the connection terminal and external conductor, and fills the space between the connection terminal and the terminal holder to prevent the adhesive from leaking inward to the stator. This allows the simple work of applying adhesive only once to the adhesive reservoir, making the insulation work using adhesive easy and efficient.

According to the seventh feature of the present invention, the insertion hole is composed of a through hole formed in the holder main portion, and a cylindrical portion coaxially connected to the through hole and integrally connected to the holder main portion. By making at least a portion of the cylindrical portion tapered and configuring the leakage prevention structure at its small diameter end and the outer periphery of the external conducting wire, the leakage prevention structure can be configured while suppressing the increase in the number of parts.

According to the assembly method according to the ninth feature of the present invention, the external conductor inserted through the insertion hole of the terminal holder separated from the bobbin is connected, and the connection terminal to which the external conductor is connected is connected. Since the lead wire is connected to the connection terminal while it is attached to the bobbin, and then adhesive is applied to the terminal holder, the coil is wound through the bobbin to the connection terminal, making it large and heavy. While making it easier to connect the external conductor of the stay to the stay, it also makes it easier to attach the connecting terminal to the bobbin, which improves the workability of attaching the connecting terminal.It also improves the electrical insulation of the connecting part of the lead wire and the external conductor to the connecting terminal. Cost reduction can be achieved by ensuring performance.

3 is a longitudinal sectional view of the fan motor of the first embodiment, and is a sectional view taken along line 1-1 in FIG. 2. FIG. 2 is a sectional view taken along line 2-2 in FIG. 1. FIG. FIG. 3 is a simplified exploded perspective view of the stator in a state before the terminal holder is attached. 3 is a sectional view taken along line 4-4 in FIG. 2. FIG. 5 is a sectional view taken along line 5-5 in FIG. 4. FIG. It is a perspective view of a connection terminal. FIG. 5 is a sectional view corresponding to FIG. 4 of the second embodiment. FIG. 5 is a sectional view corresponding to FIG. 4 of the third embodiment. FIG. 2 is a longitudinal sectional view corresponding to FIG. 1 of the fourth embodiment.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

The first embodiment of the present invention will be described with reference to FIGS. 1 to 6. First, in FIGS. 1 to 2, the outer rotor type rotating electric machine of this embodiment is a fan motor, and the support member 12 A stator 10 is fixed to the rotor 10, and a rotor 11 covers the stator 10. A fan (not shown) is attached to the rotor 11.

The stator 10 has a plurality of salient poles 13a protruding from the outer periphery of a cylindrical stator core 13 formed by laminating and bonding a plurality of magnetic steel plates. A plurality of coils 15 including W poles are wound, and support protrusions 13b provided at a plurality of locations, for example, four locations at equal intervals in the circumferential direction of the inner periphery of the stator core 13, are attached to the support member 12 by bolts 19. is concluded. The support protrusion 13b may be integrally formed with the stator core 13, or the support protrusion 13b may be formed by coupling a member different from the stator core 13 to the stator core 13.

The rotor 11 includes a rotor case 16 made of magnetic metal and a plurality of permanent magnets 18 provided therein. The rotor case 16 includes a cylindrical outer cylinder part 16a coaxially surrounding the stator 10, a cylindrical shaft part 16b coaxially arranged radially inward of the stator 10, the outer cylinder part 16a and It integrally includes an end wall portion 16c that connects one end portion of the shaft portion 16b. The permanent magnet 18 is provided on the inner peripheral surface of the outer cylinder portion 16a, facing the stator core 13 from the outside in the radial direction. In this embodiment, the rotor case 16 is made of magnetic metal, but for example, a ring made of magnetic metal is provided on the inner peripheral surface of the outer cylindrical portion 16a of the rotor case 16 made of a material different from magnetic metal. A shaped yoke may be press-fitted, and the permanent magnets 18 may be provided on the inner peripheral surface of the yoke. In this case, the plurality of permanent magnets 18 will be provided on the rotor case 16 via the yoke. .

The support member 12 includes a cylindrical portion 12a that coaxially surrounds the shaft portion 16b with one end facing the end wall portion 16c of the rotor case 16, and a plurality of positions in the other end of the cylindrical portion 12a in the radial direction. It integrally includes a plurality of supporting collar portions 12b that extend outward. The support flange 12b protrudes from the cylindrical portion 12a in correspondence with the support protrusion 13b provided on the stator core 13, and the bolt 19 inserted through the support protrusion 13b extends from the support flange 12b. screwed into. Further, the shaft portion 16b of the rotor case 16 is rotatably supported by the cylindrical portion 12a of the support member 12 via a pair of ball bearings 20.

Referring also to FIGS. 3 to 5, a connection terminal 23 made of a conductive metal is disposed on the bobbin 14 at one end in the axial direction and inward in the radial direction of the stator core 13. A lead wire 24 of the coil 15 and an external conducting wire 25 are connected to the connection terminal 23 . Connecting wires 21 connected to the coils 15 are arranged outside each coil 15 at one end of the stator core 13 in the axial direction, and the lead wires 24 extend from the connecting wires 21 inward in the radial direction of the stator core 13. It extends and is connected to the connection terminal 23.

The connection terminal 23 is attached to a terminal holder 26 that is a separate member from the bobbin 14, and the terminal holder 26 is attached to the bobbin 14.

At one end of the stator core 13 in the axial direction, the bobbin 14 is integrally formed with a flat mounting plate portion 14a that extends radially inward and is disposed between the plurality of support protrusions 13b. . The terminal holder 26 is attached to a selected one of the mounting plate parts 14a, and in this embodiment, the terminal holder 26 is attached to one of the four mounting plate parts 14a arranged between the four support protrusions 13b. The terminal holder 26 is attached to three of the attachment plate portions 14a.

The selected mounting plate portion 14a has a through hole 27 extending in a long arc shape along the circumferential direction of the stator 10, and a pair of engagement members disposed at positions sandwiching the through hole 27 from both sides in the circumferential direction. A hole 28 is bored.

The terminal holder 26 is a flat plate-shaped holder main body that is large enough to close the through hole 27 and is formed in an arc shape that extends long along the circumferential direction of the stator 10 and comes into contact with the mounting plate portion 14a. part 26a, a fitting protrusion 26b that is integrally provided on the holder main part 26a and fitted into the through hole 27, and a fitting protrusion 26b that is engaged with the engagement hole 27, and A pair of engaging claws 26c are provided integrally and continuously connected to the holder main portion 26a at positions sandwiching the holder main portion 26b from both sides in the circumferential direction.

An insertion hole is provided in the terminal holder 26 on one side 26aa of the holder main portion 26a facing the opposite side from the mounting plate portion 14a to allow insertion of a part of the connection terminal 23 and insertion of the external conductor 25. One end of the insertion hole 30 is opened, and the insertion hole 30 is coaxially connected to a through hole 31 bored in the holder main part 26a, and one end is integrally connected to the holder main part 26a. cylindrical portion 32.

Further, one end of a bottomed positioning hole 33 provided in the terminal holder 26 is opened in the one surface 26aa of the holder main portion 26a so that a part of the connection terminal 23 can be fitted therein, and the positioning The hole 33 is arranged outside the insertion hole 30 in the radial direction of the stator 10 .

The insertion hole 30 and the positioning hole 33 form a pair with respect to one connection terminal 23. In this embodiment, since three connection terminals 23 are attached to one terminal holder 26, the pair is formed as a pair. The insertion holes 30 and the positioning holes 33 are provided in the terminal holder 26 at three locations spaced apart from each other in the circumferential direction of the stator 10 .

Referring also to FIG. 6, the connection terminal 23 connects the external conductor 25 and the flat plate portion 23a that comes into contact with the one surface 26aa of the holder main portion 26a, as well as the insertion hole 30. When the plate-shaped part 23a is in contact with the one surface 26aa, the connection part with the external conductor 25 is placed in the insertion hole 30, and the plate-shaped part 23a and the fitting are inserted into the insertion hole 30. The end of the lead wire 24 can be inserted and crimped between the insertion part 23b, which is integrally connected to the mating protrusion 26b, and the plate-shaped part 23a, and is integrally connected to the plate-shaped part 23a. It is integrally formed to include a holding plate part 23c and a positioning protrusion 23d that can be fitted into the positioning hole 33 and is integrally connected to the plate part 23a.

The insertion portion 23b includes a connecting plate portion 23ba whose one end is integrally connected to the plate-shaped portion 23a and has a rectangular cross section and which is inserted into the insertion hole 30, and a conductive wire connection which is connected to the other end of the connecting plate portion 23ba. The conducting wire connecting portion 23bb has a slit 34 extending in the axial direction at one location in the circumferential direction so that the external conducting wire 25 inserted into the conducting wire connecting portion 23bb can be crimped and connected. It is formed into a cylindrical shape. Moreover, the length of the insertion portion 23b is set such that the conductor connection portion 23bb is located within the insertion hole 30 with the plate portion 23a in contact with one surface 26aa of the holder main portion 26a.

Further, in this embodiment, in addition to the three connection terminals 23, a common connection terminal 35 for connecting three neutral wires 36 extending from the crossover wire 21 is attached to the holder main portion 26a of the terminal holder 26. It will be done.

The connection terminal 23 to which the external conductor 25 and the lead wire 24 are connected, and the common connection terminal 35 to which the three neutral wires 36 are connected are attached to the terminal holder 26, and the terminal holder 26 is attached to the bobbin 14. , the terminal holder 26 has a connection portion between the lead wire 24 and the connection terminal 23, a connection portion between the neutral wire 36 and the common connection terminal 35, and An adhesive 37 is applied to cover the connection terminal 23 and the connection portion of the external conductor 25 in the insertion hole 30 and fill the space between the connection terminal 23 and the terminal holder 26 .

The adhesive 37 is an insulating epoxy resin, such as an epoxy-modified silicone elastic adhesive or an acrylic-modified silicone resin. The terminal holder 26 may be formed of a material to which the adhesive used is easily attached, and may be formed of the same synthetic resin as the bobbin 14 or a different synthetic resin from the bobbin 14.

On the one surface 26aa side of the holder main portion 26a, one end opening of the insertion hole 30, one end opening of the positioning hole 33, the connection terminal 23 attached to the terminal holder 26, and the lead wire 24 are provided. An adhesive reservoir 38 surrounds the connecting portion of the connecting terminal 23 and the neutral wire 36, the connecting portion of the connecting terminal 23 and the lead wire 24, the common connecting terminal 35, and the neutral wire 36. It is formed so that the connecting portion of the sex wire 36 can be filled with the adhesive 37.

The adhesive storage portion 38 is integrally provided with the one surface 26aa of the holder main portion 26a and extends in an endless manner defining the outer periphery of the adhesive storage portion 38 and protrudes from the one surface 26aa of the holder main portion 26a. In this embodiment, the peripheral wall portion 26d is integrally provided on the holder main portion 26a so as to rise from the outer peripheral edge of the holder main portion 26a. be done.

Grooves 39 into which a part of the lead wire 24 is inserted are formed in the protruding end of the peripheral wall 26d, one each corresponding to the three connection terminals 23, and connected to the common connection terminal 35. Three grooves 40 are formed into which parts of the three neutral wires 36 to be inserted are inserted.

4 and 5, the adhesive 37 from the adhesive reservoir 38 leaks into the terminal holder 26 through the inner surface of the insertion hole 30 and the gap between the insertion portion 23b. In this embodiment, a heat shrink tube is provided between the end of the cylindrical portion 32 opposite to the holder main portion 26a and the external conducting wire 25. 42 constitutes the leakage prevention structure 41A.

By the way, in connecting the external conductor 25 and the lead wire 24 to the connection terminal 23, there is a step of inserting the external conductor 25 into the insertion hole 30 of the terminal holder 26 which is separated from the bobbin 14. , connecting the external conductor 25 inserted into the insertion hole 30 to the connection terminal 23; and connecting the coil 15 to the bobbin 14 in a state where the coil 15 is wound around the stator core 13 via the bobbin 14. a step of attaching the terminal holder 26 to the terminal holder 26, a step of attaching the connecting terminal 23 and the common connecting terminal 35 to the terminal holder 26 while accommodating the connection portion with the external conductor 25 in the insertion hole 30, and attaching the connecting terminal 23 and the common connecting terminal 35 to the terminal holder 26; 23 and the neutral wire 36 to the common connection terminal 35, and a step of applying the adhesive 37 to the terminal holder 26 are sequentially performed.

Next, the operation of the first embodiment will be described. It is formed in a separate member from the bobbin 14 and has an insertion hole 30 through which a part of the connection terminal 23 and the external conductor 25 can be inserted. At the same time, the terminal holder 26 to which the connection terminal 23 is attached is attached to the bobbin 14, so there is no need to handle the stator core 13, which is large and heavy and has the coil 15 wound thereon via the bobbin 14. , the connection terminal 23 can be attached, and the workability of attaching the connection terminal 23 can be improved. Also, while covering the connecting portion of the lead wire 24 and the connecting terminal 23, the connecting portion of the neutral wire 36 and the common connecting terminal 35, and the connecting portion of the connecting terminal 23 and the external conducting wire 25 in the insertion hole 30, Since the adhesive 37 that fills the space between the connection terminal 23 and the terminal holder 26 is applied to the terminal holder 26, a device for dipping the entire coil 15 wound around the stator core 13 in adhesive is not required. It is possible to ensure electrical insulation of the connecting portions of the lead wire 24 and the external conducting wire 25 to the connection terminal 23, and cost reduction can be achieved.

Further, the terminal holder 26 has a flat plate shape, which is in contact with the mounting plate portion 14a formed on the bobbin 14, and has one end of the insertion hole 30 opened on one side 26aa facing the opposite side from the mounting plate portion 14a. The holder main portion 26a is integrally formed with one end opening of the insertion hole 30, the connecting portion of the connecting terminal 23 and the lead wire 24 attached to the terminal holder 26, the common connecting terminal 35 and the neutral wire. An adhesive storage portion 38 surrounding the connecting portions of the connection terminals 36 and 36 allows the connecting portions of the connecting terminals 23 and the lead wires 24 and the connecting portions of the common connecting terminals 35 and the neutral wire 36 to be filled with the adhesive 37. Since it is formed on the one surface 26aa side of the holder main portion 26a, leakage of the adhesive 37 can be prevented and the finished shape can be stabilized.

Further, the adhesive storage portion 38 is connected to the one surface 26aa of the holder main portion 26a in an endless manner defining an outer periphery of the adhesive storage portion 38 and integrally protrudes from the one surface 26aa of the holder main portion 26a. A groove 39 into which a part of the lead wire 24 is inserted and a groove 40 into which a part of the neutral wire 36 is inserted are formed at the protruding end of the surrounding wall part 26d. Therefore, the tips of the lead wire 24 and the neutral wire 36 can be reliably immersed in the adhesive 37 in the adhesive reservoir 38.

Further, the connection terminal 23 enables connection between the flat plate portion 23a that abuts the one surface 26aa of the holder main portion 26a and the external conductive wire 25, and insertion into the insertion hole 30. An insertion portion 23b integrally connected to the plate portion 23a such that the connection portion with the external conductor 25 is disposed within the insertion hole 30 when the plate portion 23a is in contact with the one surface 26aa. Therefore, when the connecting terminal 23 has its plate-like portion 23a in contact with the holder main portion 26a, the connecting portion of the external conductor 25 and the connecting terminal 23 can be stably held within the insertion hole 30. .

Further, a positioning hole 33 that opens on the one surface 26aa of the holder main portion 26a is formed in the terminal holder 26, and the end of the lead wire 24 is inserted between the connection terminal 23 and the plate-like portion 23a. Since it is provided with a clamping plate portion 23c that is capable of being crimped and is integrally connected to the plate-like portion 23a, and a positioning protrusion 23d that is integrally continuous with the plate-like portion 23a that is capable of being fitted into the positioning hole 33, The connection of the lead wire 24 to the connection terminal 23 is easy, and the connection terminal 23 can be positioned with respect to the terminal holder 26, and the connection part of the external conductor 25 to the insertion part 23b can be stably connected within the insertion hole 30. It becomes possible to hold the

The insertion hole 30 also includes a through hole 31 bored in the holder main portion 26a, and a cylindrical portion 32 coaxially connected to the through hole 31 and having one end integrally connected to the holder main portion 26a. The adhesive 37 from the adhesive reservoir 38 is applied to the inner surface of the insertion hole 30 and the insertion portion 23b between one of the external conductor 25 and the insertion portion 23b and the cylindrical portion 32. Since the leakage prevention structure 41A is provided to prevent leakage through the gap between the lead wires 24 and the connecting terminals 23, the adhesive 37 is applied so as to accumulate in the adhesive reservoir 38. The adhesive 37 not only covers the connecting portion of the neutral wire 36 and the common connecting terminal 35, but also covers the connecting portion of the connecting terminal 23 and the external conductor 25, and fills the space between the connecting terminal 23 and the terminal holder 26. It is possible to prevent the adhesive 37 from leaking inward to the stator 10, and the simple work of applying the adhesive 37 to the adhesive reservoir 38 once is sufficient, making the insulation work using the adhesive 37 easy. and efficient.

Further, in connecting the external conductive wire 25 and the lead wire 24 to the connection terminal 23, a step of inserting the external conductive wire 25 into the insertion hole 30 of the terminal holder 26 which is separated from the bobbin 14; A step of connecting the external conductor 25 inserted into the insertion hole 30 to the connection terminal 23, and a step of connecting the coil 15 to the bobbin 14 with the coil 15 wound around the stator core 13 via the bobbin 14. a step of attaching the terminal holder 26; a step of attaching the connection terminal 23 and the common connection terminal 35 to the terminal holder 26 while accommodating the connection portion with the external conductor 25 in the insertion hole 30; and a step of attaching the connection terminal 23 and the common connection terminal 35 to the terminal holder 26; Since the step of connecting the lead wire 24 to the common connection terminal 35 and the step of connecting the neutral wire 36 to the common connection terminal 35 and the step of applying the adhesive 37 to the terminal holder 26 are performed in sequence, the bobbin 14 is Connect the external conductor 25 inserted into the insertion hole 30 of the terminal holder 26 in the separated state, and connect the connecting terminal 23 and the common connection with the connecting terminal 23 to which the external conductor 25 is connected attached to the bobbin 14. The lead wire 24 and the neutral wire 36 are connected to the terminal 35, and then an adhesive 37 is applied to the terminal holder 26. This makes it easy to connect the external conductor 26 to the connecting terminal 23, while also attaching the bobbin of the connecting terminal 23. 14 to improve the workability of attaching the connecting terminal 23, and the connecting portion of the lead wire 24 and the external conductor 25 to the connecting terminal 23, and the connecting portion of the neutral wire 36 to the common connecting terminal 35. Cost reduction can be achieved by ensuring electrical insulation.

Next, second to fourth embodiments of the present invention will be described with reference to FIGS. 7 to 9, respectively. Parts corresponding to those in the first embodiment are denoted by the same reference numerals and illustrated. A detailed explanation will be omitted.

A second embodiment of the present invention will be described with reference to FIG. 7. The adhesive 37 from the adhesive storage section 38 passes through the inner surface of the insertion hole 30 and the gap between the insertion section 23b. A leakage prevention structure 41B provided on the terminal holder 26 so as to prevent leakage has one end tightly fitted to the conductor connection portion 23bb of the insertion portion 23b, and has an outer surface formed on the inner surface of the insertion hole 30. The other end of the heat-shrinkable tube 45 may be attached to the outer periphery of the external conducting wire 25 outside the cylindrical portion 32 .

A third embodiment of the present invention will be described with reference to FIG. 8. An insertion hole 47 through which a part of the connection terminal 23 and the external conductor 25 can be inserted is provided in the holder main portion 26a. It is composed of a through hole 31 to be drilled, and a cylindrical portion 48 that is coaxially connected to the through hole 31 and has one end integrally connected to the holder main portion 26a, and at least the other end side of the cylindrical portion 48 is The cylindrical portion 48 is formed in a tapered shape, and in this embodiment, the portion from the middle portion in the length direction to the other end of the cylindrical portion 48 is configured as a tapered portion 48a. A leakage prevention device is provided on the terminal holder 26 to prevent the adhesive 37 from the adhesive storage portion 38 from leaking through the inner surface of the insertion hole 30 and the gap between the insertion portion 23b. The structure 41C is composed of the other small diameter end of the cylindrical part 48, that is, the small diameter end of the tapered part 48a, and the outer periphery of the external conductor 25, and the inner diameter of the small diameter end of the tapered part 48a is equal to the inner periphery of the small diameter end. is set close to or close to the outer periphery of the external conducting wire 25. According to the third embodiment, the leakage prevention structure 41C can be constructed while suppressing the increase in the number of parts.

Furthermore, as a fourth embodiment of the present invention, as shown in FIG. 9, the stator 10, except for a part of the inner circumference and the outer circumference, is covered with a covering part 50 formed by molding a synthetic resin. Good too.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the scope of the invention described in the claims. is possible.

For example, the present invention can be applied not only to the fan motor described in the embodiment, but also to a power generator.

13... Stator core 13a... Salient pole 14... Bobbin 15... Coil 23... Connection terminal 23a... Plate-shaped part 23b... Insertion part 23c... Holding plate part 23d...・Positioning protrusion 24...Output wire 25...External conductor 26...Terminal holder 26a...Holder main portion 26aa...One side 26d...Surrounding wall portions 30, 47...Through hole 31・...Through hole 33...Positioning hole 37...Adhesive 38...Adhesive reservoir 39...Grooves 41A, 41B, 41C...Leakage prevention structure 48...Cylinder part

Claims (9)

A coil (15) is wound around a plurality of salient poles (13a) provided on the outer periphery of the stator core (13) via a bobbin (14), one end of the stator core (13) in the axial direction and radially inward. A stator for an outer rotor type rotating electric machine, in which a lead wire (24) of the coil (15) and an external conductor wire (25) are connected to a conductive metal connection terminal (23) arranged on the bobbin (14) on the side. In,
It is formed in a separate member from the bobbin (14) and has an insertion hole (30, 47) through which a part of the connection terminal (23) and the external conductor (25) can be inserted. A terminal holder (26) to which the connection terminal (23) is attached is attached to the bobbin (14), and is connected to the connecting portion of the lead wire (24) and the connection terminal (23), and the insertion hole (30, 47). An adhesive (37) that fills the gap between the connection terminal (23) and the terminal holder (26) while covering the connection terminal (23) and the connection part of the external conductor (25) inside the terminal holder ( 26) A stator for an outer rotor type rotating electrical machine characterized by being coated with. The terminal holder (26) is brought into contact with a mounting plate portion (14a) formed on the bobbin (14), and one end of the insertion hole (30, 47) is placed opposite to the mounting plate portion (14a). It integrally has a flat holder main part (26a) opened on one side (26aa) facing the side, and is attached to one end opening of the insertion hole (30, 47) and the terminal holder (26). An adhesive storage part (38) surrounding the connection terminal (23) and the connection part of the lead wire (24) connects the connection part of the connection terminal (23) and the lead wire (24) to the adhesive (37). 2. The stator for an outer rotor type rotating electric machine according to claim 1, wherein the stator is formed on the one surface (26aa) side of the holder main portion (26a) so as to be able to be filled with the outer rotor type rotating electrical machine. The adhesive storage portion (38) defines the one surface (26aa) of the holder main portion (26a) and the outer periphery of the adhesive storage portion (38), and is continuous with the holder main portion (26a). ) and a peripheral wall portion (26d) integrally protruding from the one surface (26aa) of the groove ( 39). The stator for an outer rotor type rotating electrical machine according to claim 2, characterized in that: 39) is formed. The connection terminal (23) connects the flat plate portion (23a) that comes into contact with the one surface (26aa) of the holder main portion (26a) with the external conductor (25) and the insertion hole. (30, 47), while the plate-shaped portion (23a) is in contact with the one surface (26aa), the connecting portion with the external conductor (25) is inserted into the insertion hole (30, 47). The stator for an outer rotor type rotating electrical machine according to claim 3, further comprising an insertion portion (23b) integrally connected to the plate-like portion (23a) so as to be disposed inside the stator. A positioning hole (33) that opens on the one surface (26aa) of the holder main part (26a) is formed in the terminal holder (26), and the connection terminal (23) is formed between the terminal holder (26) and the plate-shaped part (23a). The end of the lead wire (24) can be inserted into and crimped, and can be fitted into the holding plate part (23c) integrally connected to the plate part (23a) and the positioning hole (33). The stator for an outer rotor type rotating electric machine according to claim 4, further comprising a positioning protrusion (23d) that is integrally connected to the plate-shaped portion (23a). A leakage prevention structure that prevents the adhesive (37) from the adhesive storage section (38) from leaking through the inner surface of the insertion hole (30, 47) and the gap between the insertion section (23b). (41A, 41B, 41C) are provided in the terminal holder (26), the stator for an outer rotor type rotating electric machine according to claim 5. The insertion hole (47) is coaxially connected to a through hole (31) bored in the holder main part (26a) and the through hole (31), and one end is integrated with the holder main part (26a). At least the other end side of the cylinder part (48) is formed in a tapered shape that becomes smaller in diameter as it moves away from the holder main part (26a), and the leakage prevention The stator for an outer rotor type rotating electrical machine according to claim 6, wherein the structure (41C) is constituted by the other end side small diameter end of the cylindrical portion (48) and the outer periphery of the external conductor (25). . The stator for an outer rotor type rotating electric machine according to any one of claims 1 to 7, wherein the adhesive (37) is an insulating epoxy resin. A method for assembling a stator for an outer rotor type rotating electric machine according to any one of claims 1 to 8, comprising:
When connecting the external conductor (25) and the lead wire (24) to the connection terminal (23), the insertion hole (30) of the terminal holder (26) is separated from the bobbin (14). , 47), and a step of connecting the external conductor (25) inserted through the insertion hole (30, 47) to the connection terminal (23). a step of attaching the terminal holder (26) to the bobbin (14) with the coil (15) wound around the stator core (13) via the bobbin (14); attaching the connecting terminal (23) to the terminal holder (26) while accommodating the connecting portion in the insertion hole (30, 47), and connecting the lead wire (24) to the connecting terminal (23). A method for assembling a stator for an outer rotor type rotating electric machine, characterized in that the steps of applying the adhesive (37) to the terminal holder (26) are sequentially performed.