JP6892953B2 - motor - Google Patents

Description

The present invention relates to a motor.

Conventionally, a motor in which a plurality of terminals are provided on a stator is known. Further, the plurality of terminals are separately arranged by separate members that are independent of each other (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2008-167604

However, in the conventional technique, when the terminals are separately arranged by separate members, a circuit board for electrically connecting the terminals is required separately, which may complicate the circuit configuration.

The present invention has been made in view of the above, and an object of the present invention is to provide a motor having a simple circuit configuration.

In order to solve the above-mentioned problems and achieve the object, the motor according to one aspect of the present invention includes a stator and a conductive member. The stator is tubular and has a conducting wire. The conductive member is provided on the stator and extends in the circumferential direction. Further, the conductive member includes terminals. In the radial direction, the conducting wire passes through a part of the outer peripheral wall portion of the conductive member and is wound around the inner peripheral portion and the outer peripheral portion of the stator, and the outer peripheral wall of the conductive member. There is a space between a part of the portion and the conducting wire passing through a part of the outer peripheral wall portion of the conductive member .

According to one aspect of the present invention, it is possible to provide a motor having a simple circuit configuration.

FIG. 1 is a perspective view of the motor according to the embodiment. FIG. 2 is a cross-sectional view of the motor according to the embodiment. FIG. 3 is a perspective view of the motor according to the embodiment. FIG. 4 is a perspective view of the stator according to the embodiment. FIG. 5 is a perspective view of the stator according to the embodiment. FIG. 6 is a perspective view of the frame according to the embodiment. FIG. 7 is a top view of the frame according to the embodiment. FIG. 8 is a cross-sectional view of the frame according to the embodiment. FIG. 9 is a perspective view of the internal terminal according to the embodiment. FIG. 10 is a perspective view of the internal terminal according to the embodiment. FIG. 11 is a top view of the insulator according to the embodiment. FIG. 12 is a perspective view of the internal terminal according to the modified example. FIG. 13 is a perspective view of the internal terminal according to the modified example. FIG. 14 is a perspective view of the insulator according to the embodiment. FIG. 15 is a top view of the insulator according to the embodiment. FIG. 16 is a perspective view of the insulator according to the modified example. FIG. 17 is a diagram illustrating a method of winding the conducting wire according to the embodiment. FIG. 18A is a diagram illustrating wiring of a conducting wire according to an embodiment. FIG. 18B is a diagram illustrating wiring of the conducting wire according to the embodiment. FIG. 19 is a perspective view of the motor according to the modified example. FIG. 20 is a cross-sectional view of the motor according to the modified example. FIG. 21 is a top view of the stator according to the modified example.

Hereinafter, the motor according to the embodiment will be described with reference to the drawings. The dimensional relationship of each element in the drawing, the ratio of each element, and the like may differ from the reality. Even between drawings, there may be parts with different dimensional relationships and ratios. In each drawing, in order to make the explanation easy to understand, a three-dimensional Cartesian coordinate system in which the axial direction of the motor 1 is the Z-axis positive direction may be illustrated.

Further, in the following embodiment, the case where the motor 1 is an inner rotor type brushless motor will be described, but the motor 1 may be an outer rotor type brushless motor.

First, the appearance of the motor 1 according to the embodiment will be described with reference to FIG. As shown in FIG. 1, the motor 1 includes a rotating shaft 2, a frame 3, and a plurality of external terminals 4a to 4c. The motor 1 has, for example, a columnar shape, and rotates when a three-phase alternating current is supplied via the external terminals 4a to 4c.

The rotating shaft 2 extends in the axial direction of the motor 1, and a power transmission mechanism such as a gear is rotatably provided together with the rotating shaft 2 at one end (on the Z-axis positive direction side) protruding from the frame 3 described later. .. In the following, the axial direction of the motor 1 which is the Z-axis direction may be described as the rotation axis direction.

The frame 3 is formed of a metal member containing a metal material such as iron or aluminum, and includes a housing portion 3a, a lid portion 3b, and a bottom portion 3c. The housing portion 3a has a cylindrical shape, specifically a cylindrical shape, and a stator, a rotor, and the like, which will be described later, are accommodated in the internal space.

The lid portion 3b is a lid that covers the opening at one end of the housing portion 3a on the positive direction side of the Z axis. Further, the lid portion 3b is provided with a through hole through which the rotating shaft 2 and the external terminals 4a to 4c pass.

The plurality of external terminals 4a to 4c are formed of, for example, a conductive metal material, extend in the rotation axis direction, which is the Z-axis direction, and project from the frame 3. As a result, the three-phase alternating current can be supplied to the motor 1 from the external power supply via the external terminals 4a to 4c.

Further, the plurality of external terminals 4a to 4c pass through the through holes of the lid portion 3b in the frame 3 and project in the direction of the rotation axis. Each of the three external terminals 4a to 4c corresponds to each phase of three-phase alternating current (U phase, V phase, W phase). In the following, the three external terminals 4a to 4c may be collectively referred to as the external terminal 4.

Next, the internal structure of the motor 1 will be described with reference to FIGS. 2 and 3. FIG. 2 is a cross-sectional view of the motor 1 according to the embodiment. FIG. 2 shows a cross section of the motor 1 cut along the line AA shown in FIG. FIG. 3 is a perspective view of the motor 1 according to the embodiment. In FIG. 3, the frame 3 is omitted from the viewpoint of easy viewing.

As shown in FIGS. 2 and 3, the motor 1 includes internal terminals 5a and 5b (internal terminals 5a and 5b are collectively internal terminals 5), a stator 6, insulators 7a and 7b, a rotor 8, and a bearing portion. 11a and 11b are further provided.

The stator 6 has a tubular magnetic member (an example of a magnetic material). The magnetic member is formed of, for example, a plate-shaped metal member such as a soft magnetic steel plate such as a silicon steel plate or an electromagnetic steel plate. Specifically, the stator 6 is formed by stacking a plurality of plate-shaped metal members in the direction of the rotation axis.

The stator 6 is not limited to the case where a plurality of metal members are stacked and formed, and the stator 6 may be integrally formed by one metal member.

Further, as shown in FIG. 2, the stator 6 has an outer peripheral portion 6a facing the housing portion 3a of the frame 3, an inner peripheral portion 6b, and end faces 6c and 6d in the rotation axis direction which is the Z-axis direction. The end surface also includes a top surface facing the outside, a bottom surface facing the outside, and the most end surface in the Z-axis direction.

Further, the stator 6 has a conducting wire. Specifically, in the stator 6, a part of the conducting wire is wound around the outer peripheral portion 6a side and the inner peripheral portion 6b side via the insulator 7a described later.

A conducting wire is a member in which a wire rod made of a conductive metal such as copper is covered with an insulating member. The conducting wire forms a coil 10 at the inner peripheral portion 6b of the stator 6.

The coil 10 surrounds the magnetic member of the stator 6. Specifically, the coil 10 is formed in the inner peripheral portion 6b of the stator 6 by winding a conducting wire clockwise or counterclockwise around a magnetic member (teeth) via insulators 7a and 7b described later. ..

The rotor 8 is a rotating body in the motor 1, and includes a yoke 8a and a magnet 8b. Further, the rotor 8 is a so-called inner rotor type provided along the inner peripheral portion 6b of the stator 6. The rotor 8 is not limited to the inner rotor type, and may be a so-called outer rotor type provided along the outer peripheral portion 6a of the stator 6.

The yoke 8a has a through hole through which the rotating shaft 2 passes, and is fixed to the rotating shaft 2 at a position concentric with the rotating shaft 2. The magnet 8b is a tubular permanent magnet, the inner peripheral surface of the magnet 8b is fixed to the outer peripheral surface of the yoke 8a, and the outer peripheral surface of the magnet 8b faces the inner peripheral portion 6b of the stator 6. Further, in the radial direction of the motor 1, a magnetic gap is formed between the magnet 8b and the inner peripheral portion 6b of the stator 6. As a result, the rotor 8 is rotated by the magnetic field generated by the stator 6.

The insulators 7a and 7b are tubular insulating members made of, for example, a resin or other insulating material, and are provided on the stator 6. Specifically, the insulators 7a and 7b are provided at positions that cover the stator 6. More specifically, the insulators 7a and 7b cover the end faces 6c and 6d of the stator 6 and a part of the inner peripheral portion 6b.

For example, the insulator 7a covers a part of the end face 6c on the outer terminal 4 side and a part of the inner peripheral portion 6b on the outer terminal 4 side of the end faces 6c and 6d of the stator 6. Further, the insulator 7b covers a part of the other end surface 6d and the inner peripheral portion 6b other than the inner peripheral portion 6b covered by the insulator 7a.

The plurality of internal terminals 5a and 5b extend in the rotation axis direction, which is the Z-axis direction, and are housed in the housing portion 3a of the frame 3. Further, the plurality of internal terminals 5a and 5b are integrally formed by one conductive member, and this point will be described later in FIG.

Further, as shown in FIG. 3, a plurality of internal terminals 5 are provided in the insulator 7a. Specifically, the plurality of internal terminals 5a and 5b are provided on the insulator 7a on the side opposite to the stator 6 (Z-axis positive direction side). In other words, the plurality of internal terminals 5a and 5b are provided on the stator 6 via other members (insulator 7a in FIG. 3).

Further, as shown in FIG. 3, the above-mentioned external terminal 4 is also provided on the insulator 7a in the same manner as the internal terminals 5a and 5b. Specifically, the plurality of internal terminals 5a and 5b and the plurality of external terminals 4a to 4c are arranged side by side in the circumferential direction. A more detailed arrangement of the plurality of internal terminals 5a and 5b and the plurality of external terminals 4a to 4c will be described later with reference to FIG.

The plurality of internal terminals 5a and 5b and the plurality of external terminals 4a to 4c may be collectively referred to as terminal 45. That is, the terminal 45 is provided on the insulator 7a.

The bearing portions 11a and 11b are bearings that have through holes through which the rotating shaft 2 passes and support the rotating shaft 2. The bearing portion 11a is provided on the side of the external terminal 4 which is the Z-axis positive direction side of the rotor 8, and the bearing portion 11b is provided on the side opposite to the bearing portion 11a.

Next, the stator 6 will be described in detail with reference to FIGS. 4 and 5. 4 and 5 are perspective views of the stator 6 according to the embodiment. FIG. 4 shows a perspective view seen from the Z-axis positive direction side, and FIG. 5 shows a perspective view seen from the Z-axis negative direction side.

Further, FIGS. 4 and 5 show only the metal member 610 at the end of the external terminal 4 side (see FIG. 2) among the plurality of metal members constituting the stator 6, and the other metal members are integrated. It is shown in.

As shown in FIG. 4, the stator 6 includes a tubular core 61 and a plurality of teeth 62a to 62f. The plurality of teeth 62a to 62f are arranged in the circumferential direction with respect to the core 61 and extend in the radial direction. More specifically, the plurality of teeth 62a to 62f are arranged side by side in the circumferential direction on the outside of the rotor 8.

Further, each of the plurality of teeth 62a to 62f faces one tooth 62a to 62f in the radial direction. For example, the teeth 62a and the teeth 62d face each other, the teeth 62b and the teeth 62e face each other, and the teeth 62c and the teeth 62f face each other.

Although six teeth 62a to 62f are shown in FIG. 4, the number of teeth may be two or seven or more. In the following, a plurality of teeth 62a to 62f may be collectively referred to as teeth 62.

Further, a coil 10 is provided in each of the plurality of teeth 62a to 62f. Specifically, the coil 10 surrounds a plurality of teeth 62a to 62f via insulators 7a and 7b (see FIG. 3).

Further, as shown in FIG. 4, the stator 6 is provided with one or a plurality of recesses 63 in the outer peripheral portion 6a. Specifically, a plurality of the plurality of recesses 63 are arranged in the circumferential direction and extend in the rotation axis direction.

That is, the recess 63 is formed by stacking the recesses of the metal members at substantially the same position in the circumferential direction. The recess 63 faces the protruding portion of the frame 3 described later, and this point will be described later with reference to FIG. 7.

It should be noted that a plurality of recesses 63 may not necessarily be provided on the outer peripheral portion 6a of the stator 6, and at least one may be provided. Further, the recess 63 does not necessarily extend straight in the rotation axis direction, and may extend in a curved shape in the rotation axis direction. Further, the recess 63 is continuously formed from one end face 6c of the stator 6 to the other end face 6d, but is continuously formed from an intermediate position between one end face 6c to the other end face 6d to one end face. It may be formed.

Further, as shown in FIG. 5, in the stator 6, a metal member 610, which is an end portion on the external terminal 4 side, closes the recess 63. In other words, in the stator 6, the recess 63 is provided in the outer peripheral portion 6a of the other metal member among the plurality of metal members, and the other metal member is different from the metal member 610 adjacent to the external terminal 4.

The recess 63 is provided in a metal member other than the metal member 610 closest to the external terminal 4. The metal member 610 is in contact with the frame 3, and this point will be described later in FIG.

Further, as shown in FIG. 5, the metal member 610 is provided with a recess 63a at a position different from that of the recess 63 in the circumferential direction. That is, the metal member 610 is provided so as to be rotated by a predetermined angle from other metal members in the circumferential direction. The rotation angle is the angle at which the teeth 62 overlap. As a result, among the plurality of metal members on which the teeth 62a, 62b, 62c, 62d, 62e described later are formed, the recess 63a is formed in the metal member arranged closest to the external terminal 4, and the other metal members have the recess 63a. The recess 63 can be formed at a position different from that of the recess 63a. From the above, it is not necessary to separately prepare the metal member 610 having a shape different from that of the other metal members except for the recesses 63 and 63a, so that the cost can be reduced.

In FIG. 4, the recess 63a of one metal member 610 is provided at a position rotated by a predetermined angle from the recess 63 of the other metal member, but the recess 63a may be similarly provided in the plurality of metal members. .. That is, although the recess 63 is closed by one metal member 610, the recess 63 may be closed by a plurality of metal members.

Further, among the plurality of metal members, the recess 63a is provided in the metal member 610 closest to the external terminal 4, but any metal member on the external terminal 4 side is sufficient, and the metal member 610 closest to the external terminal 4 is limited. It's not something. Specifically, among the plurality of metal members, the recess 63a may be provided in the metal member located on the outer terminal 4 side of the central metal member in the rotation axis direction.

Further, in FIG. 4, the recess 63 is closed by one metal member 610 of the plurality of metal members constituting the stator 6, but the recess 63 may be closed by a member different from the metal member of the stator 6. Alternatively, the recess 63 may be closed by the insulator 7a.

Next, the frame 3 will be described with reference to FIGS. 6 to 8. FIG. 6 is a perspective view of the frame 3 according to the embodiment. FIG. 7 is a top view of the frame 3 according to the embodiment. FIG. 8 is a cross-sectional view of the frame 3 according to the embodiment. FIG. 8 shows a cross-sectional view cut along the line BB shown in FIG.

As shown in FIG. 6, the frame 3 has a protruding portion 31a on the inner peripheral portion 31. Specifically, a part of the inner peripheral portion 31 of the frame 3 is a protruding portion 31a that projects toward the outer peripheral portion 6a of the stator 6 (see FIG. 2) in the radial direction.

The position of the protrusion 31a in the circumferential direction corresponds to the recess 63 of the stator 6, and the position in the rotation axis direction corresponds to the metal member 610 of the stator 6. This point will be described with reference to FIGS. 7 and 8.

7 and 8 show the positional relationship between the frame 3 (protruding portion 31a) and the stator 6. As shown in FIG. 7, the frame 3 is provided with a plurality of protrusions 31aa to 31ac.

Specifically, the protrusions 31aa are provided on one side, and the two protrusions 31ab and 31ac are provided on the other side. The number of protruding portions 31a may be one or more, and may be three or more.

The protruding portions 31aa to 31ac are in contact with the outer peripheral portion 6a of the stator 6. Specifically, each of the protruding portions 31aa to 31ac is in contact with the metal member 610. That is, the stator 6 is supported by the protrusions 31aa to 31ac of the frame 3.

Further, as shown in FIG. 7, the protruding portions 31aa to 31ac face each recess 63 of the stator 6 in the radial direction. More specifically, the protrusions 31aa to 31ac are inside the recess 63. This point will be described with reference to FIG.

FIG. 8 shows the positional relationship between the stator 6 and the protruding portion 31a in the direction of the rotation axis. Further, FIG. 8 shows a metal member 610 closest to the external terminal 4 (see FIG. 2) and other metal members 611 to 616.

As shown in FIG. 8, the end portion of the protruding portion 31a is located inside the outer peripheral portion 6a of the stator 6 in the positive direction of the X-axis in the radial direction. Specifically, it is located inside a recess 63 formed by metal members 611 to 616 other than the metal member 610 adjacent to the insulator 7a among the plurality of metal members 610 to 616.

Further, the protruding portion 31a is in contact with the metal member 610 adjacent to the insulator 7a in the rotation axis direction inside the recess 63. Here, the insulator 7a is provided with an external terminal 4 (see FIG. 2). That is, the protruding portion 31a is in contact with the metal member 610 adjacent to the external terminal 4.

The protruding portion 31a is in contact with the metal member 610 in the rotation axis direction, but is not limited to this, and may be in contact with the metal member 610 in the radial direction which is the X-axis direction. In such a case, the protruding portion 31a may be in contact with the outer peripheral portion 6a of the metal member 610 and may have a mechanism for pressing the metal member 610 in the radial direction.

As an example of the pressing mechanism, for example, a mechanism for pressing the metal member 610 by penetrating a screw or the like from the outer peripheral portion of the frame 3 toward the inner peripheral portion 31 and tightening the frame 3 can be mentioned.

Further, the protruding portion 31a is supported by being in contact with the metal member 610 of the stator 6, but the present invention is not limited to this, and the protrusion 31a may be supported by being in contact with the insulator 7a or another member.

Next, the internal terminal 5 will be described in detail with reference to FIGS. 9 to 11. FIG. 9 is a perspective view of the internal terminal 5 according to the embodiment. FIG. 10 is a bottom view of the internal terminal 5 according to the embodiment. FIG. 11 is a top view of the insulator 7a according to the embodiment.

As shown in FIG. 9, the plurality of internal terminals 5a and 5b are integrally formed of, for example, a conductive member. Here, the term "integrally formed" includes, for example, a case where a plurality of conductive members are connected and formed, and a case where a single conductive member is formed.

As shown in FIG. 9, the plurality of internal terminals 5a and 5b include a fixing portion 51, a first connecting portion 52a, a second connecting portion 52b, and a supporting portion 53. Further, the internal terminal 5 has a recess 54 formed in the outer peripheral wall portion in the direction of the rotation axis. Specifically, the recess 54 has a space 54a inside.

The fixing portion 51 is a portion fixed to the insulator 7a. More specifically, the fixing portion 51 is inserted and fixed in a hole (not shown) provided in the insulator 7a.

The first connecting portion 52a and the second connecting portion 52b are portions to which the conducting wires are connected. Further, the first connecting portion 52a and the second connecting portion 52b have a hook-shaped hook folded back on the side opposite to the fixing portion 51. More specifically, the hooks of the first connecting portion 52a and the second connecting portion 52b have a bent portion 52c that is bent inward of the stator 6 (see FIG. 3) in the radial direction.

In the first connecting portion 52a and the second connecting portion 52b, the conducting wire is entwined with the hook, and the tip portion of the hook is welded by heat caulking to fix the conducting wire. Further, in the conducting wire, the coated insulating member is melted by heat caulking, so that the metal portion of the conducting wire comes into contact with the metal portions of the first connecting portion 52a and the second connecting portion 52b. As a result, the conducting wire electrically connects the coil 10 (see FIG. 3) and the terminal 45.

The support portion 53 is a portion between the fixed portion 51 and the first connection portion 52a in the circumferential direction, and is a portion that supports the first connection portion 52a with respect to the stator 6 via an insulating member. More specifically, the support portion 53 is inserted into and fixed to the hole portion of the insulator 7a.

Further, as shown in FIG. 10, in the circumferential direction, the length W1 from the first connecting portion 52a to the fixed portion 51 is larger than the length W2 from the second connecting portion 52b to the fixed portion 51. .. Further, the length W3 from the support portion 53 to the first connection portion 52a is substantially the same as the length W2 from the fixed portion 51 to the second connection portion 52b. In FIG. 10, the lengths W1, W2, and W3 start from the center of the starting point (eg, the second connecting portion 52b, the supporting portion 53, and the fixing portion 51) to the ending point (eg, the fixed portion). 51, the first connection portion 52a, the second connection portion 52b) are shown up to the center.

The support portion 53 is provided between the fixed portion 51 and the first connecting portion 52a, but is not limited to this, and the supporting portion 53 is also provided between the fixed portion 51 and the second connecting portion 52b. You may. Alternatively, one portion connecting the support portion 53 and the fixing portion 51 may also serve as the support portion 53 and the fixing portion 51. Other examples of the support portion 53 will be described later with reference to FIGS. 12 and 13.

Next, the arrangement of the internal terminal 5 and the external terminal 4 will be described with reference to FIG. FIG. 11 is a top view of the insulator 7a according to the embodiment. As shown in FIG. 11, the insulator 7a has a tubular first insulating portion 71a provided on the core 61 (see FIG. 4) of the stator 6 and a second insulating portion 71b provided on the plurality of teeth 62.

As shown in FIG. 11, the external terminal 4 and the internal terminal 5 are provided in the first insulating portion 71a of the insulator 7a. Specifically, a plurality of internal terminals 5 are provided on one side of the first insulating portion 71a on the X-axis positive direction side, and a plurality of external terminals 4a to 4c are provided on the X-axis negative direction of the first insulating portion 71a. It is provided on the other side, which is the side.

Further, each of the external terminals 4a to 4c has fixed portions 41a to 41c fixed to the insulator 7a. Of the external terminals 4a to 4c, the two external terminals 4a and 4c facing each other in the radial direction have the fixing portions 41a and 41c facing the corresponding teeth 62 among the plurality of teeth 62.

Further, in the external terminal 4b between the two external terminals 4a and 4c facing each other, the fixing portion 41b is arranged between the plurality of teeth 62 in the radial direction. That is, the fixing portion 41b of the external terminal 4b is arranged between the plurality of coils 10 in the circumferential direction. In other words, the fixing portion 41b of the external terminal 4b is provided on the insulator 7a at a position different from that of the plurality of teeth 62 in the circumferential direction.

Further, in the internal terminal 5 facing the external terminal 4b, the fixing portion 51 is arranged between the plurality of teeth 62 in the circumferential direction. In other words, the internal terminal 5 is fixed adjacent to the coil 10 in the circumferential direction. Further, the support portion 53 of the internal terminal 5 faces any of the plurality of teeth 62.

Next, another example of the internal terminal 5 will be described with reference to FIGS. 12 and 13. 12 and 13 are views showing the internal terminal 5 according to the modified example. As shown in FIG. 12, the internal terminal 5 has a portion where a part of the fixing portion 51 and the supporting portion 53 are connected. Specifically, the support portion 53 is connected to a part of the fixing portion 51 that is closer to the first connection portion 52a than the recess 54.

That is, in the fixing portion 51, the portion on the side of the first connecting portion 52a also functions as the fixing portion 51 and the supporting portion 53 across the recess 54, and the portion on the side of the second connecting portion 52b is the function of the fixing portion 51 alone. Have.

Further, as shown in FIG. 13, a portion in which all the fixing portions 51 and the supporting portions 53 are integrated may be provided. In such a case, as shown in FIG. 13, the recess 54 may be omitted or may be provided in another portion of the internal terminal 5.

Although the internal terminal 5 has the support portion 53 in FIGS. 9, 12, and 13, the support portion 53 may be omitted. Specifically, the internal terminal 5 has a fixing portion 51 substantially in the center between the first connecting portion 52a and the second connecting portion 52b in the circumferential direction. That is, the internal terminal 5 has a length W1 from the first connecting portion 52a to the fixed portion 51 (see FIG. 9) and a length W2 from the second connecting portion 52b to the fixed portion 51 (see FIG. 9) in the circumferential direction. ) Has a shape having substantially the same length. As a result, it is possible to prevent one of the lengths W1 and W2 from becoming extremely long, and thus it is possible to prevent the conductor from being broken due to vibration.

Further, according to the above configuration, the terminal 45 vibrates due to the vibration of the motor 1, and the shaking at the first connection portion 52a and the second connection portion 52b becomes relatively large, and the first connection portion 52a and the second connection portion 52a and the second connection portion By changing the tension of the coil 10 with the shaking at 52b, it is possible to prevent the conductor 100 from being disconnected.

Next, the shape of the insulator 7a will be described with reference to FIG. FIG. 14 is a perspective view of the insulator 7a according to the embodiment. FIG. 14 shows a state in which the conducting wire 100 is welded to the connecting portion 42 of the external terminal 4.

As shown in FIG. 14, a recess 72 is provided in the first insulating portion 71a of the insulator 7a. Specifically, in the insulator 7a, a recess 72 is formed in a part of the first insulating portion 71a facing the conducting wire 100 in the radial direction.

Further, the motor 1 has a space between the recess 72 and the conducting wire 100 in the radial direction. That is, the insulator 7a and the conductor 100 are separated from each other. As a result, it is possible to prevent the conductor 100 and the first insulating portion 71a from being welded due to the heat at the time of welding at the connecting portion 42, and as a result, the conductor 100 is prevented from being broken.

Further, as shown in FIG. 14, the recess 72 is provided between the plurality of teeth 62 in the circumferential direction. Further, the recess 72 is provided between the teeth 62 and the connecting portion 42 of the external terminal 4 in the direction of the rotation axis. Further, the insulator 7a has a plurality of recesses 72. This point will be described with reference to FIG.

FIG. 15 is a top view of the insulator 7a. As shown in FIG. 15, the plurality of recesses 72a to 72e are formed in the circumferential direction with the first connection portion 52a and the second connection portion 52b of the internal terminals 5a and 5b and the connection portions 42a to 42c of the external terminals 4a to 4c. It is provided in.

In FIG. 15, by forming the recess 72 in the first insulating portion 71a, welding of the conducting wire 100 and the first insulating portion 71a was prevented, but for example, a protruding portion may be formed instead of the recess 72. Good. This point will be described with reference to FIG.

FIG. 16 is a perspective view of the insulator 7a according to the modified example. As shown in FIG. 16, the insulator 7a has protrusions 73a and 73b protruding in the rotation axis direction. The protrusions 73a and 73b are arranged at predetermined intervals in the circumferential direction.

The connecting portion 42 of the external terminal 4 is arranged between the protruding portions 73a and 73b in the circumferential direction. That is, the protruding portion 73a and the protruding portion 73b are arranged so as to sandwich the connecting portion 42 of the external terminal 4 in the circumferential direction.

Further, the protruding portions 73a and 73b cover a part of the connecting portion 42 of the external terminal 4 and the conducting wire 100. Specifically, the protruding portions 73a and 73b cover a part of the connecting portion 42 on the insulator 7a side in the rotation axis direction. Further, the protruding portions 73a and 73b cover the inside of the connecting portion 42 and a part of both ends of the conducting wire 100 in the circumferential direction.

Further, the protruding portions 73a and 73b are welded to the connecting portion 42 of the external terminal 4. Specifically, the protruding portions 73a and 73b are welded by the heat of the connecting portion 42 at the time of heat caulking. That is, the protruding portions 73a and 73b are in contact with and fixed to the connecting portion 42.

Further, as shown in FIG. 16, the protruding portions 73a and 73b are provided between the plurality of teeth 62 in the circumferential direction. The protrusions 73a and 73b are provided for each of the plurality of terminals 45 in the same manner as the recess 72 described above (see FIG. 15).

Next, a method of winding the conductor 100 will be described with reference to FIG. FIG. 17 is a diagram illustrating a method of winding the conductor 100 according to the embodiment. As shown in FIG. 17, the insulator 7a has fixed portions 74a and 74b.

Specifically, the fixing portions 74a and 74b are portions protruding from the first insulating portion 71a in the direction of the rotation axis. Further, the fixing portions 74a and 74b are provided between the external terminals 4 in the circumferential direction.

To each of the fixed portion 74a and the fixed portion 74b, the end portions corresponding to the winding start and winding end of the conducting wire 100 when wired in a one-stroke manner are fixed. The one-stroke wiring method will be described later in FIGS. 18A and 18B.

Further, as shown in FIG. 17, a plurality of grooves 75a, 75b, 75c are provided on the outer peripheral portion of the insulator 7a. The height positions of the grooves 75a, 75b, and 75c are different in the rotation axis direction.

For example, the groove 75a is located at the uppermost stage of the outer peripheral portion of the insulator 7a in the rotation axis direction, and the groove 75b is adjacent to the lower side of the groove 75a on the negative Z-axis side in the rotation axis direction, and the groove 75c Is adjacent to the lower side of the groove 75b, which is the negative direction side of the Z axis, in the direction of the rotation axis.

Then, the conducting wire 100 is wound around each of the grooves 75a, 75b, and 75c. The conducting wire 100 is wound around each of the grooves 75a, 75b, and 75c along the outer peripheral portion in one circumference or half a circumference or less.

That is, the conducting wires 100 do not come into contact with each other in the grooves 75a, 75b, and 75c. In other words, the winding positions of the plurality of conductors 100 (three in FIG. 15) wound around the outer peripheral portion of the insulator 7a are different from each other in the rotation axis direction.

Although three grooves 75a, 75b, and 75c are shown in FIG. 17, the number of grooves may be one or two, or four or more. In other words, the number of grooves may be a number corresponding to the number of windings of the conducting wire wound around the outer peripheral portion of the insulator 7a. Further, the grooves 75a, 75b and 75c may not be provided as needed.

Further, as shown in FIG. 17, the conductor 100 has a first portion 101 and a second portion 102. The first portion 101 and the second portion 102 are connected to each other via the connecting portion 42, and extend from the connecting portion 42 in two different directions.

The first portion 101 extends from the connection portion 42 of the external terminal 4 toward the teeth 62. Further, the first portion 101 is wound clockwise in the teeth 62 to form the coil 10. The wiring procedure after forming the coil 10 of the first portion 101 will be described later in FIGS. 18A and 18B.

Further, the second portion 102 is routed around the first portion 101 forming the coil 10. Specifically, the second portion 102 extends from the fixed portion 74a to the teeth 62, and is wound around the teeth 62 counterclockwise by about half a turn. That is, the direction in which the second portion 102 is drawn (counterclockwise) is opposite to the winding direction (clockwise) of the first portion 101 forming the coil 10.

Further, the second portion 102 extends to the connecting portion 42 after being routed to the teeth 62. Further, between the connecting portion 42 and the teeth 62, the first portion 101 is on the coil 10 side with respect to the second portion 102. That is, the first portion 101 is arranged at a position closer to the coil 10 than the second portion 102.

Specifically, the first portion 101 is on the coil 10 side with respect to the connecting portion 42 (hook), and the second portion 102 is on the opposite side of the connecting portion 42 from the first portion 101.

Further, the first portion 101 and the second portion 102 are separated from each other in the circumferential direction. That is, between the connecting portion 42 and the teeth 62, the first portion 101 and the second portion 102 are arranged at intervals from each other.

Further, the second portion 102 is in contact with the coil 10 in the teeth 62. That is, the second portion 102 is in contact with the first portion 101 forming the coil 10. The first portion 101 and the second portion 102 do not necessarily have to be in contact with each other in the teeth 62, and the second portion 102 may be bypassed and routed. Further, the second portion 102 may be routed around a member other than the teeth 62.

Further, although FIG. 17 shows a case where the second portion 102 is left, the second portion 102 may be removed after the coil 10 is formed.

Next, the wiring of the conductor 100 will be described with reference to FIGS. 18A and 18B. 18A and 18B are diagrams for explaining the wiring of the conductor 100 according to the embodiment. FIG. 18A shows a top view of each part including the insulator 7a, and FIG. 18B shows a wiring diagram. In FIG. 18A, each part through which the conducting wire 100 passes is given a reference numeral in the wiring diagram of FIG. 18B, and the same reference numerals are given to the portion corresponding to FIG. 18B.

That is, as shown in FIG. 18A, the conducting wire 100 includes a plurality of teeth 62a to 62f, the first connecting portions 52a and the second connecting portions 52b of the internal terminals 5a and 5b, and the connecting portions of the external terminals 4a, 4b and 4c. It passes through the 42a, 42b, 42c, the grooves 75a, 75b, 75c of the insulator 7a, and the fixing portions 74a, 74b.

As a result, a W-phase magnetic circuit is formed by the coils 10 wound around the two opposing teeth 62a and 62d, and a U-phase magnetic circuit is formed by the coils 10 wound around the two opposing teeth 62b and 62e. A V-phase magnetic circuit is formed by a coil 10 formed and wound around two opposing teeth 62c and 62f.

Next, the wiring procedure of the conductor 100 will be described with reference to FIG. 18B. As shown in FIG. 18B, first, the end of the lead wire 100 is fixed to the fixed portion 74a, and is routed around the teeth 62a adjacent in the circumferential direction in a counterclockwise direction by half a turn or one turn.

Subsequently, the conducting wire 100 is entwined counterclockwise around the connecting portion 42c of the external terminal 4c, exits the connecting portion 42c, and is wound around the teeth 62a a plurality of times clockwise to form the coil 10. ..

Subsequently, the conductor 100 is wound around the teeth 62a, then extends over the outer peripheral portion of the insulator 7a, and is wound around the lowermost groove 75c in the circumferential direction to the position of the teeth 62d.

Subsequently, the conducting wire 100 extends from the outer peripheral portion to the inner peripheral portion of the insulator 7a, is wound around the teeth 62d in a plurality of clockwise directions to form a coil 10, and clocks around the second connecting portion 52b of the internal terminal 5b in the circumferential direction. Tangled around.

Subsequently, after exiting the second connecting portion 52b, the conducting wire 100 is entwined clockwise around the connecting portion 42a of the adjacent external terminal 4a, and is wound around the teeth 62e in a plurality of clockwise directions to form a coil. Form 10.

Subsequently, the conductor 100 is wound around the teeth 62e, then is wound from the inner peripheral portion to the outer peripheral portion of the insulator 7a, and the groove 75b in the middle stage is wound counterclockwise to the position of the teeth 62b in the circumferential direction.

Subsequently, the conducting wire 100 extends from the outer peripheral portion to the inner peripheral portion of the insulator 7a, is wound around the teeth 62b in a plurality of clockwise directions to form a coil 10, and clocks around the first connecting portion 52a of the internal terminal 5a in the circumferential direction. Tangled around.

Subsequently, after exiting the first connecting portion 52a, the conducting wire 100 is wound around the adjacent teeth 62c a plurality of times counterclockwise to form the coil 10. Subsequently, the conducting wire 100 passes through the recesses 54 of the internal terminals 5a and 5b, extends from the inner peripheral portion to the outer peripheral portion of the insulator 7a, and extends clockwise through the uppermost groove 75a to the position of the teeth 62f. It is rolled up.

Subsequently, the conducting wire 100 extends from the outer peripheral portion to the inner peripheral portion of the insulator 7a and is wound around the teeth 62f a plurality of times counterclockwise to form a coil 10, and the connecting portion 42b of the external terminal 4b is counterclockwise in the circumferential direction. Tangled clockwise.

Subsequently, the conductor 100 is fixed to the fixed portion 74b after exiting the connecting portion 42b, and ends the wiring. That is, by following the wiring procedure described above, the conductor 100 is wound in a one-stroke manner. In other words, the single conductor 100 forms a plurality of coils 10 and is wound around the inner peripheral portion and the outer peripheral portion of the insulator 7a.

In the above-described embodiment, the case where the insulators 7a and 7b cover the end faces 6c and 6d of the stator 6 and the inner peripheral portion 6b (see FIG. 2) has been described, but the present invention is not limited to this, and the insulators 7a and 7b Instead of 7b, an insulating film may be provided on the inner peripheral portion 6b of the stator 6. This point will be described with reference to FIGS. 19 to 21.

FIG. 19 is a perspective view of the motor 1 according to the modified example. FIG. 20 is a cross-sectional view of the motor 1 according to the modified example. The difference from the above-described embodiment is that a part of the stator 6 is covered with an insulating film instead of the insulator 7.

As shown in FIGS. 19 and 20, of the two end faces 6c and 6d of the stator 6 facing the coil 10, one end face 6c on the external terminal 4 side is covered with the insulator 7a.

Further, an adhesive member (not shown) is provided between the insulator 7a and the end surface 6c of the stator 6. As a result, the adhesive member fixes the insulator 7a and the coil 10. An insulating film 30 is provided on the other end face 6d and the inner peripheral portion 6b.

The insulating film 30 is formed by, for example, powder coating an insulating resin member or the like. As in the above embodiment, the end face 6d may be provided with an insulator 7b instead of the insulating film 30.

Next, the insulating film 30 will be further described with reference to FIG. FIG. 21 is a top view of the stator 6 according to the modified example. As shown in FIG. 21, the insulating film 30 is provided on a side surface (inner peripheral portion 6b) other than the side surface 620 facing the rotor 8 among the plurality of teeth 62.

Specifically, the insulating film 30 covers the inner peripheral portion 6b which is the side surface between the two opposing end faces 6c and 6d of the stator 6 in the rotation axis direction. More specifically, the insulating film 30 covers the side surface of the core 61 facing the rotor 8 and the side surface (excluding the side surface 620) of the plurality of teeth 62.

Further, the insulator 7a (not shown in FIG. 21) covers an end surface of the core 61 of the stator 6 and a part of the end surface of the teeth 62. Specifically, the insulator 7a covers the end face of the teeth 62 other than the end face on the rotor 8 side in the radial direction.

As described above, the motor 1 according to the embodiment includes a stator 6, an insulating member (insulator 7), and a terminal 45. The stator 6 has a conductor 100. The insulating member is provided on the stator 6. The terminal 45 is provided on the insulating member. Further, the terminal 45 includes fixing portions 41a to 41c, 51 fixed to the insulating member, and one or more connecting portions 42, 52 to which the conducting wire 100 is connected. Further, the terminal 45 is provided with a support portion 53 that supports the stator 6 at a portion between the fixed portions 41a to 41c, 51 and the connecting portions 42, 52 in the circumferential direction. As a result, the vibration of the terminal 45 can be suppressed, so that the conductor 100 connected to the connecting portions 42 and 52 can be prevented from being disconnected.

Further, in the motor 1 according to the embodiment, the terminal 45 includes a plurality of connecting portions 42, 52, and the length from the first connecting portion 52a to the fixed portion 51 among the plurality of connecting portions 42, 52 in the circumferential direction. W1 is larger than the length W2 from the second connecting portion 52b to the fixed portion 51. Further, the support portion 53 is provided in a portion between the first connection portion 52a and the fixing portion 51. As a result, it is possible to prevent the conducting wire 100 connected to the first connecting portion 52a of the internal terminal 5 from being disconnected.

Further, in the motor 1 according to the embodiment, the length W3 from the support portion 53 to the first connection portion 52a is substantially the same as the length W2 from the fixed portion 51 to the second connection portion 52b. As a result, the vibration of the first connection portion 52a can be suppressed to the same extent as the vibration of the second connection portion 52b.

Further, in the motor 1 according to the embodiment, the stator 6 has a plurality of teeth 62 arranged in the circumferential direction. The fixing portion 51 is provided between the plurality of teeth 62 in the radial direction. As a result, the thickness T1 of the core 61 having the side surface on which the teeth 62 is provided can be reduced in the radial direction, so that the number of turns of the coil 10 can be increased by lengthening the teeth 62. Further, in the radial direction, the thickness T2 of the insulating member covering the side surface of the core 61 provided with the teeth 62 can be reduced. Therefore, the number of turns of the coil 10 can be increased.

Further, in the motor 1 according to the embodiment, the support portion 53 faces any one of the plurality of teeth 62 in the radial direction. As a result, the support portion 53 is stabilized, so that the influence of vibration can be minimized. Further, by arranging the support portion 53 at a position different from the teeth 62 around which the coil 10 is wound in the radial direction, the thickness T2 of the insulating member covering the side surface of the core 61 provided with the teeth 62 can be reduced. Therefore, the number of turns of the coil 10 can be increased.

Further, the motor 1 according to the embodiment includes a magnetic material, an insulating member (insulator 7), a terminal 45, a coil 10, and a conducting wire 100. The insulating member (insulator 7) covers the magnetic material. The terminal 45 is provided on the insulating member. The coil 10 surrounds the magnetic material. The conducting wire 100 electrically connects the coil 10 and the terminal 45. Further, the conductor 100 is welded to the terminal 45, and a recess 72 is provided in a part of the insulating member facing the conductor 100 in the radial direction. As a result, when the terminal 45 and the conductor 100 are welded by heat caulking, the insulator 7a is melted by the heat transmitted to the coil 10, and the conductor 100 and the insulator 7a can be prevented from sticking to each other. Further, by preventing the sticking, the stress associated with the vibration does not act on the conducting wire 100, so that the disconnection can be prevented.

Further, in the motor 1 according to the embodiment, there is a space between the recess 72 and the conducting wire 100. As a result, it is possible to reliably prevent the conductor 100 and the insulator 7a from sticking to each other.

Further, the motor 1 according to the embodiment includes a stator 6. The stator 6 has an annular shape or a tubular shape, and has a magnetic material. The magnetic material includes a tubular core 61 and a plurality of teeth 62 extending in the radial direction. The plurality of teeth 62 are arranged in the circumferential direction with respect to the core 61. The insulating member covers a part of the end faces 6c and 6d of the stator 6 and the inner peripheral portion 6b. The terminal 45 is provided on the side of the insulating member opposite to the stator 6, and is provided on a part of the insulator 7a on the end surface 6c side of the stator. Further, the conducting wire 100 forming the coil 10 is wound around a plurality of teeth 62 via an insulating member. As a result, it is possible to prevent the coil 10 and the insulator 7a from sticking to each other.

Further, in the motor 1 according to the embodiment, the recess 72 is provided between the plurality of teeth 62 in the circumferential direction. As a result, it is possible to prevent the conductor 100 between the teeth 62 and the terminal 45 from sticking to the insulator 7a, and as a result, it is possible to prevent the conductor 100 from being broken.

Further, in the motor 1 according to the embodiment, the recess 72 is provided between the teeth 62 and the terminal 45 in the rotation axis direction. As a result, it is possible to prevent sticking between the teeth 62 and the terminal 45 in the direction of the rotation axis.

Further, in the motor 1 according to the embodiment, the insulating member has a tubular first insulating portion 71a provided on the core 61 of the stator 6 and a second insulating portion 71b provided on the plurality of teeth 62. Further, the terminal 45 is provided in the first insulating portion 71a. As a result, it is possible to prevent the conducting wire 100 from sticking to the first insulating portion 71a.

Further, if the conductor 100 is fixed to the first insulating portion 71a, the length of the conductor 100 becomes smaller (shorter), tension easily acts on the conductor 100 due to the vibration of the motor 1, and the conductor 100 breaks. There is a risk that it will end up. However, by preventing this sticking, the length of the conductor 100 can be sufficiently secured, the action of the tension acting on the conductor 100 can be reduced, and the occurrence of disconnection can be prevented.

Further, in the motor 1 according to the embodiment, the terminal 45 extends in the rotation axis direction, and the terminal 45 is provided with a bent portion 52c bent inward of the stator 6 in the radial direction. Further, the conducting wire 100 is welded to the bent portion 52c. As a result, the conducting wire 100 is fixed inside the stator 6 in the radial direction, so that it can be reliably prevented from sticking to the insulator 7a.

Further, in the motor 1 according to the modified example of the embodiment, the insulating member includes protrusions 73a and 73b protruding in the direction of the rotation axis. The protrusions 73a and 73b cover a part of the terminal 45 and a part of the conducting wire 100. As a result, when the terminal 45 and the conductor 100 are welded by heat caulking, the insulator 7a is melted by the heat transmitted to the coil 10 via the conductor 100, and the conductor 100 and the insulators 7a other than the protrusions 73a and 73b are fixed to each other. Can be prevented. Further, by preventing sticking, it is possible to prevent stress due to vibration from acting on the conductor 100, so that disconnection can be prevented.

Further, in the motor 1 according to the modified example of the embodiment, the protruding portions 73a and 73b are welded to the terminal 45. As a result, the protrusions 73a and 73b are welded near the terminal 45, so that the stress of vibration on the conductor 100 can be suppressed.

Further, the motor 1 according to the modified example of the embodiment includes a pair of protrusions 73a and 73b, and the terminal 45 is provided between the pair of protrusions 73a and 73b in the circumferential direction. As a result, since the terminal 45 can be sandwiched, it is possible to prevent the lead wire 100 from being welded.

Further, in the motor 1 according to the modified example of the embodiment, the protrusions 73a and 73b are provided between the plurality of teeth 62 in the circumferential direction. As a result, it is possible to prevent the conductor 100 between the teeth 62 and the terminal 45 from sticking to the insulator 7a, and as a result, it is possible to prevent the conductor 100 from being broken.

Further, the motor 1 according to the embodiment includes a coil 10, a terminal 45, and a conducting wire 100. The terminal 45 is adjacent to the coil 10 in the circumferential direction. The conductor 100 is electrically connected to the terminal 45. Further, the conductor 100 has a first portion 101 and a second portion 102 extending from the terminal 45 in two different directions. The first portion 101 forms the coil 10. The second portion 102 is routed around the first portion 101 forming the coil 10. The first portion 101 is on the coil 10 side with respect to the second portion 102. As a result, the stress acting on the conductor 100 due to the vibration of the motor 1 can be reduced, so that the disconnection of the conductor 100 can be prevented. Further, since the angle at which the conductor 100 is bent (obtuse angle in the illustrated example) in the vicinity of the connecting portion 42 can be increased, the action of stress due to vibration can be reduced on a part of the bent conductor 100. Further, since the stress acting by the connecting portion 42 on a part of the conducting wire 100 that comes into contact with the connecting portion 42 due to the vibration of the motor 1 can be reduced, the disconnection of the conducting wire 100 can be prevented.

Further, since the coil 10 and the terminal 45 are displaced in the circumferential direction, the conductor 100 may be bent at an acute angle at the connection point of the terminal 45 in order to connect the coil 10 and the terminal 45 with the conductor. Since this conductor 100 is connected to the terminal 45 and the coil 10, tension can be applied to the conductor 100, and in this state, the motor 1 vibrates to stress a part of the bent conductor 100. There is a risk that the conductor 100 will be disconnected. However, with the above configuration, it is possible to prevent the conductor 100 from being broken.

Further, in the motor 1 according to the embodiment, there are a plurality of coils 10. The terminals 45 are arranged between the plurality of coils 10 in the circumferential direction. As a result, it is possible to prevent the conductor 100 from being disconnected between the plurality of coils 10.

Further, the motor 1 according to the embodiment includes a stator 6 and an insulating member (insulator 7). The stator 6 has a tubular core 61 and a plurality of teeth 62 arranged in the circumferential direction. The insulating member is provided on the stator 6. The terminal 45 is provided on an insulating member located at a position different from that of the plurality of teeth 62 in the circumferential direction. The insulating member is provided with fixing portions 74a and 74b to which a part of the conducting wire 100 is fixed. The first portion 101 extends from the terminal 45 toward the teeth 62. The second portion 102 extends from the teeth 62 toward the fixed portions 74a and 74b. As a result, it is possible to prevent disconnection at the winding start portion of the conductor 100.

Further, in the motor 1 according to the embodiment, the terminal 45 includes a hook to which the conducting wire 100 is connected. The first portion 101 is on the coil 10 side with respect to the hook. The second portion 102 is on the opposite side of the hook from the first portion 101. This makes it possible to prevent the conductor 100 from coming off the terminal 45.

Further, in the motor 1 according to the embodiment, the first portion 101 of the conductor 100 and the second portion 102 of the conductor 100 are separated from each other in the circumferential direction. As a result, it is possible to prevent the first portion 101 and the second portion 102, which are in contact with each other, from being disconnected due to friction or the like due to vibration. Further, both the first portion 101 of the conductor 100 and the second portion 102 of the conductor 100 extend from the terminal 45 toward the coil 10 and do not have an intersecting portion. When the first portion 101 and the second portion 102 that intersect each other are separated from each other or are in contact with each other, they may come into contact with each other due to vibration and may be further broken due to friction or the like accompanying the contact. However, in the circumferential direction, the first portion 101 and the second portion 102 are separated from each other, and both extend from the common terminal 45 toward the common coil 10, so that the intersecting portions are not provided. Since it is rotated, it is possible to suppress the occurrence of disconnection due to friction or the like. The second portion 102 is in contact with the end of the coil 10 facing the bottom 3c of the frame 3.

Further, in the motor 1 according to the embodiment, the insulating member includes a portion facing the first portion 101 and the second portion 102, the portion of the insulating member is a recess 72, and the motor 1 has the recess 72 and the first portion. There is a space between the portion 101 and the second portion 102. As a result, it is possible to prevent the first portion 101 and the second portion 102 from sticking to the insulator 7a, so that the disconnection of the conductor 100 can be prevented.

Further, in the motor 1 according to the embodiment, the second portion 102 is in contact with the coil 10. As a result, since the second portion 102 is wound around the teeth 62, the proportion of the conducting wire 100 occupied by the second portion 102 can be minimized, so that the cost can be prevented from increasing.

Further, in the motor 1 according to the embodiment, the winding direction of the second portion 102 is opposite to the winding direction of the first portion 101 forming the coil 10. As a result, it is possible to prevent the first portion 101 and the second portion 102 from being mixed in the teeth 62.

Further, in the motor 1 according to the embodiment, the second portion 102 includes an end portion of the conducting wire 100, and the end portion is fixed to the fixing portions 74a and 74b. As a result, the coil 100 can be wound around the teeth 62 via an insulating member while fixing the winding start of the conducting wire 100, and the coil 100 having a high degree of occupancy can be formed in which looseness can be reduced.

Further, the motor 1 according to the embodiment includes a rotating shaft 2, a stator 6, a frame 3, and an external terminal 4. The stator 6 has an outer peripheral portion 6a. The frame 3 has an inner peripheral portion 31 surrounding the stator 6. The external terminal 4 extends in the direction of the rotation axis. Further, the external terminal 4 is provided on the stator 6. In the stator 6, a part of the outer peripheral portion 6a on the outer terminal 4 side is supported by a part of the inner peripheral portion 31 of the frame 3 in the rotation axis direction. As a result, even when an error occurs in the thickness of the plurality of metal members constituting the stator 6, the protruding length of the external terminal 4 can be set to a desired length.

Further, when the heights of the rotor 8 and the stator 6 are aligned by contacting the bottom surface on the other end side of the frame 3, the protruding length of the external terminal 4 may not be accurately determined. there were. Specifically, due to the tolerance of the metal members constituting the stator 6, the height position of the stator 6 may shift, and as a result, the protruding length of the external terminal 4 may vary. However, with the above-described configuration, the protruding length of the external terminal 4 can be set to a desired length.

Further, in the motor 1 according to the embodiment, a part of the inner peripheral portion 31 of the frame 3 is a protruding portion 31a protruding toward the outer peripheral portion 6a of the stator 6 in the radial direction. As a result, the stator 6 can be securely fixed in the direction of the rotation axis.

Further, in the motor 1 according to the embodiment, the stator 6 includes a plurality of metal members stacked in the rotation axis direction. These metal members are made of a magnetic material such as an electromagnetic steel plate. The external terminal 4 is provided on a plurality of metal members via other members. The protruding portion 31a is in contact with a metal member adjacent to the external terminal 4 among the plurality of metal members. As a result, even when an error occurs in the thickness of the plurality of metal members, the protruding length of the external terminal 4 can be accurately determined.

Further, in the motor 1 according to the embodiment, the stator 6 is provided with a recess 63 in the outer peripheral portion 6a of a metal member other than the metal member adjacent to the external terminal 4 among the plurality of metal members. The recess 63 faces the protrusion 31a in the radial direction. As a result, when the stator 6 is inserted into the frame 3, the recess 63 serves as a guide, so that the manufacturing operation can be facilitated.

Further, in the motor 1 according to the embodiment, the protruding portion 31a is inside the recess 63 in the radial direction. As a result, the protruding portion 31a is caught in the recess 63, so that the positional deviation in the circumferential direction or the rotation axis direction can be eliminated.

Further, in the motor 1 according to the embodiment, the external terminal 4 protrudes from the frame 3 in the direction of the rotation axis. As a result, the length of the external terminal 4 protruding from the frame 3 can be maintained with high accuracy.

Further, the motor 1 according to the embodiment includes a stator 6 and terminals 45. The stator 6 has a tubular shape. A plurality of terminals 45 are provided on the stator 6 and are arranged in the circumferential direction. The plurality of terminals 45 are integrally formed by a conductive member, and a recess 54 is formed in the outer peripheral wall portion of the conductive member in the rotation axis direction. The conducting wire 100 passes through the recess 54 and is wound around the inner peripheral portion 6b and the outer peripheral portion 6a of the stator 6. As a result, the number of parts can be reduced, and since it is not necessary to electrically connect a plurality of internal terminals with a circuit board or the like, the motor 1 can be configured with a simple circuit configuration.

Further, in the motor 1 in which the plurality of terminals 45 are provided on the stator 6, when the plurality of terminals 45 are separately arranged by separate independent members, a circuit board for electrically connecting the terminals 45 to each other is provided. Since it is required separately, the circuit configuration may be complicated. According to the above, the motor 1 can be configured with a simple circuit configuration.

Further, in the motor 1 according to the embodiment, an insulating member (insulator 7) is provided in a part of the recess 54 corresponding to the conducting wire 100 in the rotation axis direction. As a result, even when the insulating coating of the conducting wire 100 is peeled off by friction with the recess 54, it is possible to prevent the internal terminal 5 from being erroneously energized.

Further, in the motor 1 according to the embodiment, the plurality of terminals 45 include a plurality of internal terminals 5 and a plurality of external terminals 4 provided on an end surface 6c as a side surface of the stator 6 in the rotation axis direction. The plurality of internal terminals 5 and the plurality of external terminals 4 extend in the direction of the rotation axis. The plurality of internal terminals 5 are provided on one side of the end surface 6c of the stator 6 in the circumferential direction, and the plurality of external terminals 4 are provided on the other side of the end surface 6c of the stator 6. As a result, the conductor 100 can be wound efficiently. The end surface in the rotation axis direction here means a surface that is not located at the most end in the rotation axis direction but is on the end side of the rotation shaft 2 and faces the lid portion 3b of the frame 3.

Further, in the motor 1 according to the embodiment, a single conducting wire 100 is wound around an inner peripheral portion 6b and an outer peripheral portion 6a of the stator 6 to form a plurality of coils 10. As a result, it is not necessary to cut the conducting wire 100 for each magnetic circuit of each phase, so that the manufacturing man-hours can be reduced.

Further, in the motor 1 according to the embodiment, the inner peripheral portion 6b of the stator 6 is provided with a plurality of coils 10 and a plurality of magnetic materials provided with the plurality of coils 10. The single conductor 100 forms a plurality of coils 10. As a result, it is not necessary to cut the conducting wire 100 for each magnetic circuit of each phase, so that the manufacturing man-hours can be reduced, the number of connection points is reduced, and the disconnection can be prevented.

Further, in the motor 1 according to the embodiment, a plurality of winding positions of the conducting wire 100 wound around the outer peripheral portion 6a are provided in the rotation axis direction, and these winding positions are different from each other. As a result, it is possible to prevent the conductors 100 from being disconnected due to friction at the outer peripheral portion 6a of the stator 6.

Further, the motor 1 according to the embodiment includes a coil 10 and a magnetic material. The magnetic material is surrounded by the coil 10. The magnetic material includes two end faces 6c and 6d facing the coil 10 and a side surface (inner peripheral portion 6b) between the two end faces 6c and 6d in the direction of the rotation axis. The end faces 6c and 6d are covered with an insulating member (insulator 7). The side surface is covered with an insulating film 30. As a result, Joule heat generated from the coil 10 and the like can be radiated more efficiently from the insulating film to the outside of the stator 6 than the insulating member, so that deterioration of the performance of the motor 1 can be prevented.

Further, the motor 1 according to the modified example of the embodiment includes a rotor 8 and a stator 6. The stator 6 includes a magnetic material. The magnetic material includes a tubular core 61 and a plurality of teeth 62 extending from the core 61 toward the rotor 8. The plurality of teeth 62 includes end faces 6c and 6d and side surfaces. A part of the end face of the plurality of teeth 62 is covered with an insulating member. The side surfaces of the plurality of teeth 62 are covered with an insulating film 30. As a result, Joule heat generated from the coil 10 or the like can be radiated more efficiently from the insulating film to the outside of the stator 6 than the insulating member, so that deterioration of the performance of the motor 1 can be prevented. The side surface of the teeth 62 is a surface extending in the direction of the rotation axis.

Further, in the motor 1 according to the modified example of the embodiment, the side surface of the core 61 facing the rotor 8 is covered with the insulating film 30. As a result, the heat dissipation efficiency of the stator 6 to the outside can be improved. The side surface of the core 61 is a surface extending in the direction of the rotation axis.

Further, in the motor 1 according to the modified example of the embodiment, the end face 6c is used as one end face 6c, and the insulating film 30 covers the other end face 6d. As a result, it is possible to prevent heat from being trapped on the bottom surface side (the side opposite to the external terminal 4) of the frame 3.

Further, in the motor 1 according to the modified example of the embodiment, the plurality of teeth 62 are arranged side by side in the circumferential direction on the outside of the rotor 8. As a result, in the inner rotor type motor 1, Joule heat generated from the coil 10 and the like can be efficiently dissipated to the outside of the stator 6, so that deterioration of the performance of the motor 1 can be prevented.

Further, in the motor 1 according to the modified example of the embodiment, the insulating member is provided with the terminal 45. The stator 6 includes a coil 10 that surrounds a part of the magnetic material. The conducting wire 100 electrically connects the terminal 45 and the coil 10. In the radial direction, a part of the insulating member facing the conductor 100 has a recess 72, and there is a space between the recess 72 and the conductor 100. As a result, it is possible to prevent the conductor 100 and the insulator 7a from sticking to each other, and thus it is possible to prevent the conductor 100 from being disconnected.

Further, the motor 1 according to the modified example of the embodiment includes a frame 3 and an external terminal 4. The external terminal 4 is provided on the insulating member. In the direction of the rotation axis, a part of the outer peripheral portion 6a of the stator 6 on the outer terminal 4 side is supported by a part of the inner peripheral portion 31 of the frame 3. As a result, the length of the external terminal 4 protruding from the frame 3 can be accurately determined.

Further, the performance of the motor 1 is lower than that of the motor 1 which has the rotor 8 and the stator 6 surrounded by the coil 10 and the coil 10 is wound around the stator 6 via an insulating member. Can be prevented.

Further, in a motor 1 having a rotor 8 and a stator 6 surrounded by a coil 10 and having the coil 10 wound around the stator 6 via an insulating member, heat generated from the coil 10 when the motor 1 is driven is generated. In some cases, heat could not be efficiently dissipated to the outside of the stator 6. Specifically, the insulating member blocks the heat from the coil 10, so that the heat is trapped in the stator 6. Therefore, the resistance value of the coil 10 becomes high, and the performance of the motor 1 may deteriorate. However, the above-described configuration can prevent the performance of the motor 1 from deteriorating.

Further, the motor 1 according to the modified example of the embodiment includes an adhesive member. The adhesive member fixes the insulating member and the coil 10. As a result, it is possible to prevent the insulator 7a and the coil 10 from being displaced from each other.

In the above-described embodiment, the case where the motor 1 is a brushless motor has been described, but the motor 1 may be another known motor such as a brushed motor or a stepping motor.

Moreover, the present invention is not limited by the above-described embodiment. The present invention also includes a configuration in which the above-mentioned constituent elements are appropriately combined. Further, further effects and modifications can be easily derived by those skilled in the art. Therefore, the broader aspect of the present invention is not limited to the above-described embodiment, and various modifications can be made.

1 motor 2 rotation shaft 3 frame 4 external terminal 5 internal terminal 6 stator 7 insulator 8 rotor 8a yoke 8b magnet 10 coil 11a, 11b bearing part 30 insulating film 54, 63, 72 recesses 31a, 73a, 73b protrusions 41a to 41c, 51, 74a, 74b Fixed part 42 Connection part 52a First connection part 52b Second connection part 53 Support part 61 Core 62 Teeth 71a First insulation part 71b Second insulation part 100 Conductor 101 First part 102 Second part 610-616 Metal member

Claims (6)

A tubular stator with conductors and
A conductive member provided on the stator and extending in the circumferential direction is provided.
The conductive member includes terminals and
In the radial direction, the conducting wire passes through a part of the outer peripheral wall portion of the conductive member and is wound around the inner peripheral portion and the outer peripheral portion of the stator.
A motor in which there is a space between a part of the outer peripheral wall portion of the conductive member and the conducting wire passing through a part of the outer peripheral wall portion of the conductive member. The conductive member includes a plurality of terminals arranged in the circumferential direction, including the terminal.
The plurality of terminals are integrally formed by the conductive member.
A recess is formed in the outer peripheral wall portion.
The motor according to claim 1, wherein the conducting wire passes through the recess. The motor according to claim 1 or 2, wherein an insulating member is provided on a part of the outer peripheral wall portion facing the conducting wire in the direction of the rotation axis. The motor according to any one of claims 1 to 3, wherein a single conductor is wound around an inner peripheral portion and an outer peripheral portion of the stator. A plurality of coils and a plurality of magnetic materials provided with the plurality of coils are provided on the inner peripheral portion of the stator.
The single conductor
The motor according to claim 4, wherein the plurality of coils are formed. The plurality of winding positions of the conducting wire wound around the outer peripheral portion are different from each other in the rotation axis direction.
The motor according to any one of claims 1 to 5.

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