JP2003289638A - Motor, and method of manufacturing the motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a motor, where it is possible to reduce the number of required parts items and to simplify the constitution and the setup work by devising the constitution of a connector part to be set with an external connector and to increase the freedom in its attachment by lessening the quantity of projection of the connector part, and to provide a method of manufacturing this motor. <P>SOLUTION: This motor has bobbins 16 and 22, where windings 24 and 26 for generating rotating fields are wound and the connector part 40 which is arranged in the vicinity of the bobbins 16 and 22 and on which an external connector for supplying the windings 24 and 26 with power is set. The bobbins 16 and 22 have wrapping parts 32 and 34 for the windings, and these wrapping parts are arranged, being superposed axially on the connector part 40. The wrapping parts 32 and 34 for windings are insulators which are molded integrally with the bobbins 16 and 22, and the ends of the windings 24 and 26 are wrapped on the wrapping parts 32 and 34 and are soldered to the terminal member 38 of the connector part 40. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor and a method for manufacturing a motor, and more particularly to a connection structure between a winding wound around a bobbin and a connector portion into which an external connector is fitted.

[0002]

2. Description of the Related Art In a motor, a rotating magnetic field is applied to a rotor to rotate a rotor, and a winding is provided to generate the rotating magnetic field. Some of the windings need to be supplied with electric power from the outside, and for this reason, some of them have a connector portion into which an external connector is fitted. On the other hand, there is a demand for a more compact motor and a lower cost. To meet this demand, it is necessary to reduce the size and cost of the connector section.

Here, a specific example of a conventional motor will be described. In FIG. 3, a core 12, a bobbin 16, and a winding 2 are provided in a bottomed cylindrical motor case 10.
A set of four stators, a core 18, a bobbin 22,
Another set of stators composed of the windings 26 is fitted and fixed in an axially overlapping manner. Each core 12, core 18
The inner peripheral side is bent at a right angle and has a plurality of pole teeth 14 and pole teeth 20 at equal intervals in the circumferential direction. Polar tooth 14, polar tooth 2
0 forms a cylinder of the same diameter. The bobbin 16 and the bobbin 22 are fitted around the pole teeth 14 and the pole teeth 20, respectively. The bobbin 16 and the bobbin 22 have windings 2 respectively.
4. The winding 26 is wound.

The pole teeth 14 and the pole teeth 2 forming a cylinder.
On the inner peripheral side of 0, a rotor having a rotor core 48 and a rotor magnet 52 is arranged rotatably around a motor shaft 50. The motor shaft 50 includes a receiving hole formed at the center of the bottom of the motor case 10 and the motor case 1.
It is supported by the receiving portion of the end plate 46 which is covered with the open end of 0. A rotor core 48 is rotatably fitted to the outer periphery of the motor shaft 50, and a rotor magnet 52 is integrally fitted to the outer periphery of the rotor core 48. The rotor magnet 52 is magnetized into N and S poles at regular intervals in the circumferential direction. The outer peripheral surface of the rotor magnet 52 has the above-mentioned pole teeth 1
4, facing the inner peripheral surface of the pole tooth 20 with a proper gap. This motor is an example of a stepping motor, and the polarities of the pole teeth 14 and the pole teeth 20 are changed by switching the polarities of the power supplies supplied to the windings 24 and 26, and the rotor magnet 52 is magnetically attracted. The rotor including the rotor magnet 52 is rotationally driven by being urged in the circumferential direction by the repulsive force.

The bobbin 16 and the bobbin 22 each have a terminal portion 94 on the outer peripheral portion thereof, and a metal pin 82 is formed integrally with the terminal portion 94. A part of each metal pin 82 projects outward in the radial direction of the motor. A winding start end or a winding end end of the winding wire 24 or the winding wire 26 is wound around the protruding portion of each metal pin 82. A part of the outer peripheral side of the motor case 10 is cut off at a portion corresponding to the metal pin 82, and the cutout portion is provided with a connector 90. The connector section 90 mainly includes a flexible circuit board 80, a connector body 86, and a terminal member 88.
The connector body 86 is a bottomed member having a hole for receiving an external connector, and has a bottom portion facing upward, and a motor case with an appropriate gap between the side surface and the tip surface of the metal pin 82. It is fixed at 10.

The terminal member 88 is fixed by penetrating the bottom of the connector body 86. The flexible circuit board 80 is arranged along the outside of the bottom of the connector body 86 and the outside of the side of the connector body 86, and is folded back to the position of the metal pin 82. One end of the flexible circuit board 80 is penetrated by one end of the terminal member 88, and a predetermined circuit pattern of the flexible circuit board 80 and the terminal member 88 are electrically connected by soldering or the like. The other end of the flexible circuit board 80 is penetrated by each metal pin 82, and the predetermined circuit pattern of the flexible circuit board 80 and the metal pin 82 and the winding 24 and the winding start and end of the winding 26 are electrically connected by soldering or the like. Connected to each other. An external connector (not shown) is fitted in the connector portion 90, the electrical contacts of the external connector and the terminal member 88 are electrically connected, and the winding 2
4. The winding 26 is supplied with power from the outside.
The connector portion 90 projects to the outside of the motor case 10,
Since the upper part of the connector part 90 is open, the cover 92 is fitted in this open part.

Inside the motor case 10, a core 12,
A base plate 44 is disposed on the stator including the core 18, the windings 24, and the windings 26, and the end plate 46 described above is fixed at a distance from the base plate 44. A reduction gear train is incorporated between the base plate 44 and the end plate 46, and the rotational force is taken out from the output shaft 62. Gear 54 formed on the rotor core 48, gear 5 integrally formed
6, gear 58, and gear 60 integrally formed with the output shaft 62.
Constitutes a part of the reduction gear train. Thus, this conventional example constitutes a motor with a reduction gear.

[0008]

As in the conventional motor described above, the connector portion 90 has a connector body 8 into which a terminal portion 94 of a bobbin and an external connector are fitted.
6, the flexible circuit board 80 is interposed, and one end of the flexible circuit board 80 is connected to the metal pin 82 protruding outward from the terminal portion 94 in the radial direction. The other end of the flexible circuit board 80 is connected to the connector body 86. Is connected to a terminal member 88 fixed to. Therefore, the flexible circuit board 80 and the metal pins 82 are required, the number of parts is large, and the cost is high, and the connection work of the flexible circuit board 80 by soldering is troublesome. Further, since one end of the flexible circuit board 80 is folded back and connected to the metal pin 82,
Circuit pattern of flexible circuit board 80 and metal pin 8
There is a possibility of contact with the tip of 2. Furthermore, the terminal portion 9
Since the metal pins 82 projecting radially outward from 4 and the flexible circuit board 80 are overlapped in the radial direction, there is a disadvantage that the amount of projection of the connector portion 90 is large with respect to the diameter or axial dimension of the motor body. . By the way,
The diameter of the motor body is a and the connector part 9 is
When the dimension up to the maximum protruding position of 0 is b and the axial dimension of the motor body is c, a = 20 mm, b = 16 mm,
There is a motor with c = 19 mm.

The present invention has been made in view of the above-mentioned prior art. The structure of the connector portion into which the external connector is fitted is devised to reduce the number of necessary parts and simplify the structure and the assembling work. It is an object of the present invention to provide a motor and a method of manufacturing the motor that can reduce the amount of protrusion of the connector portion and increase the degree of freedom in mounting the motor.

[0010]

The invention according to claim 1 is
A motor having a bobbin around which a winding for generating a rotating magnetic field is wound, and a connector portion arranged near the bobbin and fitted with an external connector for supplying power to the winding, wherein the bobbin is wound. It is characterized in that it has a wire entangled portion, and the entangled portion is arranged so as to overlap the connector portion in the axial direction. According to a second aspect of the present invention, in the first aspect of the invention, the entwined portion of the winding is made of an insulator integrally molded with the bobbin, and the end portion of the winding is entangled with the entangled portion and It is characterized in that it is soldered to the terminal member of the connector portion.

According to a third aspect of the present invention, a bobbin around which a winding for generating a rotating magnetic field is wound, and a connector portion arranged near the bobbin and fitted with an external connector for supplying power to the winding. In the motor having a plurality of bobbins, the bobbin is superposed in the axial direction, the connector portions are arranged adjacent to each other in the radial direction of the bobbin, and the bobbin has an arm portion extending from the bobbin to the bottom side of the connector portion. The tip is bent along the bottom side of the connector part, and this bent part forms the entwined part of the winding, and the entangled part of the winding overlaps with the connector part in the axial direction. Is characterized by. According to a fourth aspect of the invention, in the third aspect of the invention, the entwined portion is made of metal, the terminal member of the connector portion is soldered to the entangled portion, and the winding and the terminal member are electrically connected. It is characterized by

According to a fifth aspect of the present invention, a bobbin around which a winding for generating a rotating magnetic field is wound, and a connector portion disposed near the bobbin and fitted with an external connector for supplying power to the winding is fitted. A method of manufacturing a motor having: a bobbin having a winding entanglement portion and the entanglement portion overlapping the connector portion in the axial direction, and It is characterized in that it is entwined with the barb and soldered to the terminal member of the connector. According to a sixth aspect of the present invention, in the invention according to the fifth aspect, the entangled portion of the winding is formed of metal, and the terminal member of the connector portion is soldered to the entangled portion to form the winding and the terminal member. It is characterized by being electrically connected.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a motor and a motor manufacturing method according to the present invention will be described below with reference to the drawings. The same components as those of the conventional example shown in FIG. 3 are designated by the same reference numerals. In FIG. 1, a core 12 is provided in a bottomed cylindrical motor case 10.
A set of stators composed of the bobbin 16 and the winding wire 24 and another set of stators composed of the core 18, the bobbin 22 and the winding wire 26 are axially overlapped and fitted and fixed. The core 12 and the core 18 are bent at right angles on the inner peripheral side and have a plurality of pole teeth 14 and pole teeth 20 at equal intervals in the circumferential direction.
The pole teeth 14 and the pole teeth 20 form a cylinder having the same diameter. The bobbins 16 and 22 are fitted around the pole teeth 14 and the pole teeth 20, respectively, and windings 24 and 26 are wound around the bobbins 16 and 22, respectively.

The pole teeth 14 and the pole teeth 2 forming a cylinder.
On the outer peripheral side of 0, a rotor having a rotor core 48 and a rotor magnet 52 is arranged rotatably around a motor shaft 50. The motor shaft 50 is supported by a receiving hole formed at the center of the bottom of the motor case 10 and a receiving portion of the end plate 46 that covers the open end of the motor case 10. A rotor core 48 is rotatably fitted to the outer periphery of the motor shaft 50, and a rotor magnet 52 is integrally fitted to the outer periphery of the rotor core 48. The rotor magnet 52 is magnetized into N and S poles at regular intervals in the circumferential direction. The outer peripheral surface of the rotor magnet 52 faces the inner peripheral surfaces of the pole teeth 14 and the pole teeth 20 with an appropriate gap.

The motor according to this embodiment is an example of a stepping motor, and the polarities of the pole teeth 14 and the pole teeth 20 are changed by switching the polarities of the power supplies supplied to the windings 24 and 26. At the same time, the rotor magnet 52 is urged in the circumferential direction by the magnetic attraction repulsive force, and the rotor including the rotor magnet 52 is rotationally driven.

A part of the outer peripheral portion of the motor case 10 is cut off, and the connector portion 40 is fixed to this cut portion.
The connector portion 40 mainly includes a connector body 36 fixed to the cutout portion and a terminal member 38 fixed through the connector body 36. Connector body 36
Is capable of being connected to an external power source by being fitted in a form that receives an external connector, is formed in a box shape with a bottom, and is fixed to the motor case 10 with the bottom portion facing upward. The terminal member 38 is the connector body 3
The bottom portion of 6 is vertically fixed and fixed. The connector body 36 can be obtained, for example, by integral molding of resin, and the terminal member 38 may be inserted and molded at the time of integral molding. Further, the terminal member 38 is the connector body 3
It may be press-fitted in No. 6.

The bobbin 22 has an arm portion 30 integrally formed by extending a part of the outer peripheral portion thereof in the axial direction and on the bottom side of the connector body 36, and along the bottom side of the connector body 36. The bent portion serves as a binding portion 34 at the end of the winding wire 26. Similarly, in the bobbin 16 as well, a part of the outer peripheral portion thereof is extended in the axial direction and to the bottom side of the connector main body 36 to integrally form the arm portion 28, and the bobbin 16 extends along the bottom side of the connector main body 36. The bent portion serves as a binding portion 32 at the end of the winding wire 24. Bobbin 16 and bobbin 22
Can be integrally formed with the arm portion 28, the arm portion 30, the binding portion 32, and the binding portion 34 by using an insulating resin. Three entangled portions 32 and 34 made of an insulator are provided, and each entangled portion 3
2. The ends of the winding wire 24 and the winding wire 26 are tentatively entangled in the entanglement portion 34. The terminal members 38 correspond to the total number of the entwined portions 32 and the entangled portions 34, and thus five terminals are provided in the illustrated example. Each terminal member 38 has the winding 24 or the winding 26 wound therein. The ends of the windings 24 and the windings 26 are electrically connected to the terminal member 38 by entwining the beginning or the winding end. Entangling part 32 entangling one winding end and entangling part 34 entangling the other winding end.
Are arranged so as to overlap each other in the axial direction, and are also arranged so as to overlap with the connector portion 40.

In FIG. 1, one winding end 42 of the winding 24 is shown.
Only the representative is drawn. At the time of assembly, the winding end portion 42 tentatively entwined with the entanglement portion 32 may be unwound and entangled with the terminal member 38, or the winding end portion 42 with the entanglement portion 32 entangled with the winding end portion 42. The rest of the portion 42 may be entwined with the terminal member 38. The winding end portion 42 entwined with the entangled portion 32 is electrically connected to the terminal member 38 by soldering or the like as described above. Similarly, the other winding terminals are also entangled and electrically connected to the corresponding terminal members 38.

An external connector (not shown) is fitted in the connector portion 40, and the electrical contacts of the external connector and the terminal member 3 are attached.
8 are electrically connected to each other, and the winding 24 and the winding 26 are supplied with power from the outside. Since the connector portion 40 projects to the outside of the motor case 10 and the upper portion of the connector portion 40 is open, a cover 72 is fitted in this open portion. The end of the winding 24 is the arm 28 of the bobbin 16.
And the outer surface of the connector body 36 are drawn through to reach the entwined portion 32. The end of the winding 26 is the bobbin 22.
It is pulled through the gap between the arm portion 30 and the arm portion 28 of the bobbin 16 to reach the binding portion 34.

Inside the motor case 10, a core 12,
A base plate 44 is disposed on the stator including the core 18, the windings 24, and the windings 26, and the end plate 46 described above is fixed at a distance from the base plate 44. A reduction gear train is incorporated between the base plate 44 and the end plate 46, and the rotational force is taken out from the output shaft 62. The gear 54 formed on the outer periphery of one end of the rotor core 48, the gear 56 and the gear 58 integrally formed, and the gear 60 integrally formed on the output shaft 62 constitute a part of the reduction gear train. is doing. Thus, this embodiment constitutes a motor with a reduction gear.

In the motor according to the above-described embodiment, the windings 24, 26 are wound adjacent to the bobbins 16, 22 around which the windings 24, 26 for generating the rotating magnetic field are wound. 26 is provided with a connector portion 40 for supplying electric power, and the arm portion 28 extending from the bobbin 16 and the bobbin 22 to the bottom side of the connector portion 40, and the tip of the arm portion 30 are bent along the bottom side of the connector portion. The bent portions are the entangled portion 32 and the entangled portion 34 of the winding terminal, and the entangled portions 32 and 34 are superposed in the axial direction.
Therefore, the amount of outward protrusion of the connector portion 40 can be reduced. By the way, under the same conditions as in the conventional example shown in FIG. 3, in the case of a motor having a diameter a of the motor body of 20 mm and an axial dimension c of the motor body portion of 19 mm, from the center of the motor to the maximum protruding position of the connector section 40. The dimension b can be set to 14 mm, and the amount of protrusion of the connector portion 40 is smaller than that of the conventional motor.

Further, according to the motor of the above-described embodiment, a new component such as the flexible circuit board 80 or the metal pin 82 in the conventional example shown in FIG. Cost reduction,
Assembling work can be facilitated. Providing two sets of cores, bobbins, and windings on the stator as in the above embodiment is not an essential requirement of the present invention, but by providing two sets of these, smooth rotation of the rotor and large torque can be achieved. Obtainable. By configuring the connector portion as in the above embodiment, the amount of protrusion of the connector portion toward the outer peripheral side can be reduced even if two sets of core, bobbin and winding are provided.

Next, another embodiment of the present invention shown in FIG. 2 will be described. In this embodiment, the structure of the connector unit 40 is different from that of the embodiment shown in FIG. 1, and therefore the structure of the connector unit 40 will be mainly described. The bobbin 16 and the bobbin 22 have an arm portion 28 and an arm portion 30 similar to those in the above-described embodiment.
However, unlike the above-mentioned embodiment, it does not have a entwined portion of the winding terminal by integral molding, and instead,
Metal pins 64, metal pins 66 are provided on the arm portions 28 and 30.
Are attached together. These metal pins 64,
66 is a binding part of the winding terminal. Metal pin 64,
The metal pin 66 can be integrally formed with the arm portion 28 and the arm portion 30 by insert molding. The metal pin 64 and the metal pin 66 are axially overlapped with each other, and are also axially overlapped with the connector portion 40.

On the other hand, the terminal members 38 forming a part of the connector portion 40 and provided in a number corresponding to the metal pins 64 and the metal pins 66 are located outside the bottom portion of the connector body 36 (see FIG. 2).
The upper end) is bent at a right angle toward the metal pin 64 and the metal pin 66, and the bent end face and the metal pin 64 and the tip face of the metal pin 66 come into contact with each other.
Or they are facing each other with a very small gap. Winding 24
The terminal is drawn along the arm portion 28 of the bobbin 16, entwined over the metal pin 64 and the bent portion of the terminal member 38, and electrically connected to the terminal member 38 by soldering. Reference numeral 68 indicates this soldering portion. Similarly, the terminal of 29 is drawn along the arm portion 30 of the bobbin 22, is entwined over the metal pin 66 and the bent portion of the terminal member 38, and is electrically connected to the terminal member 38 by soldering. ing. Reference numeral 70 indicates this soldering portion.

An external connector is fitted in the connector portion 40, and each electrical contact of the external connector is brought into contact with each terminal member 38, so that the winding 24 and the winding 26 are supplied with power from an external power source. .

Also in the embodiment shown in FIG. 2 described above, the metal pin 64 and the metal pin 66 as the entangled portion of the windings which the bobbin 16 and the bobbin 22 substantially integrally form overlap with the connector portion 40 in the axial direction. Since it is arranged as shown in FIG.
Similar to the embodiment shown in (1), the protrusion amount of the connector portion 40 can be reduced. In addition, in the embodiment shown in FIG. 2, as compared with the embodiment shown in FIG.
Although the metal pin 66 is required, compared with the conventional example shown in FIG. 3, since the flexible circuit board is unnecessary,
It can be seen that the number of components is smaller than in the past, the configuration is simple, and the assembling work is also easy.

Although all the illustrated embodiments are examples of geared motors (geared motors), the present invention is not limited to geared motors, and can be applied to motors without gears. In order to arrange the entangled portion of the winding so as to overlap the connector portion in the axial direction, it is necessary to secure a space for accommodating the entangled portion adjacent to the connector portion and in the axial direction of the connector portion. There is. On the other hand, in the case of a geared motor, if the space that overlaps the connector portion in the axial direction is the gear arrangement space, this space can be used as the entangled portion arrangement space described above. It is possible to avoid an increase in size in the axial direction.

[0028]

According to the present invention, by devising the structure of the connector portion into which the external connector is fitted, the required number of parts can be reduced and the structure and the assembling work can be simplified. Further, the degree of protrusion of the connector portion can be reduced to increase the degree of freedom in mounting the motor.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a motor and a motor manufacturing method according to the present invention.

FIG. 2 is a cross-sectional view showing another embodiment of a motor and a motor manufacturing method according to the present invention.

FIG. 3 is a sectional view showing an example of a conventional motor.

[Explanation of symbols]

16 bobbins 22 Bobbin 24 windings 26 windings 28 Arms 30 arms 32 Tangled part 34 Tangled part 38 terminal member 40 Connector 42 end of winding 68 Soldering part 70 Soldering part

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H02K 15/04 H02K 15/04 E (72) Inventor Yoshinori Ogawa 5329 Shimosuwa Town, Suwa District, Nagano Prefecture Co., Ltd. Sankyo Seiki Mfg. Co., Ltd. (72) Inventor Ei Hara 5329 Shimo Suwa-machi, Suwa-gun, Nagano Sankyo Seiki Mfg. Co., Ltd. (72) Shingo Iwashima 5329 Shimo-Suwa-cho, Suwa-gun, Nagano Sankyo Seiki Co., Ltd. F term (reference) 5E086 CC28 DD08 DD09 DD19 DD36 DD49 LL12 LL16 LL17 5H603 AA03 AA09 BB01 BB09 BB12 BB17 CA01 CA05 CA10 CB11 CB12 CC01 CC17 CD01 CD21 CD32 CE01 EE01 5H604 AA08 BB01 BB02 BB14 CC01 CC05 CC11 PB03 PB04 PC03 QB01 QB03 QB14 QB16 5H605 AA08 BB05 CC06 EC01 EC04 EC05 GG02 5H615 AA01 BB01 BB07 BB08 PP01 PP12 PP15 QQ02 QQ26 SS16

Claims (6)

[Claims] 1. A motor having a bobbin around which a winding for generating a rotating magnetic field is wound, and a connector portion disposed near the bobbin and fitted with an external connector for supplying power to the winding. The bobbin has a entangled portion of the winding, and the entangled portion is arranged so as to overlap with the connector portion in the axial direction. 2. The entwined portion of the winding is made of an insulator integrally formed with the bobbin, and the end portion of the winding is entangled with the entangled portion and soldered to the terminal member of the connector portion. The motor according to claim 1. 3. A motor having a bobbin around which a winding for generating a rotating magnetic field is wound, and a connector portion disposed near the bobbin and fitted with an external connector for supplying power to the winding. The bobbin is superposed in the axial direction, the connector parts are arranged adjacent to each other in the radial direction of the bobbin, and the tips of the arm parts extending from the bobbins to the bottom side of the connector part are The winding portion is bent along the bottom side of the connector portion, and the bending portion serves as the entangled portion of the winding, and the entangled portion of the winding is arranged so as to overlap with the connector portion in the axial direction. A motor characterized by the following. 4. The motor according to claim 3, wherein the binding portion is made of metal, the terminal member of the connector portion is soldered to the binding portion, and the winding and the terminal member are electrically connected. 5. A method of manufacturing a motor having a bobbin around which a winding for generating a rotating magnetic field is wound, and a connector portion disposed near the bobbin and fitted with an external connector for supplying power to the winding. And using a bobbin that has a entwined portion of the winding and the entangled portion overlaps with the connector portion in the axial direction, and uses the end portion of the winding as the entwined portion. A method of manufacturing a motor, which comprises tangling and soldering to a terminal member of the connector section. 6. The motor according to claim 5, wherein the winding has a entwined portion made of metal, and the terminal member of the connector portion is soldered to the entangled portion to electrically connect the winding and the terminal member. Manufacturing method.