JP7561551B2 - Motor - Google Patents

Description

The present invention relates to a motor.

In the stators of motors, generators, etc., the conductor wires drawn from the coils may be connected to terminals. In such cases, a technique is known in which the terminals to which the conductor wires are connected are provided on the wall of the insulator facing the direction of the rotation axis.

JP 2015-173544 A JP 2008-167604 A

However, when the terminals are provided on the wall of the insulator facing the direction of the rotation axis, the distance between the coil and the terminal becomes large. In this case, the conductor connecting the coil and the terminal may be easily broken due to motor vibration, etc.

In one aspect, the objective is to provide a motor that can prevent breakage of conductors.

In one aspect, the motor includes a stator. The stator includes an insulator having a wall portion, a coil, and a terminal. The terminal includes a connecting portion attached to the insulator, a first conductive portion and a second conductive portion branching from the connecting portion, and a recess formed by the first conductive portion and the second conductive portion. A recess is formed in a portion of the wall portion, and a portion of a conductor forming the coil passes through the recess of the insulator, and the conductor is electrically connected to the terminal. The conductor is connected to the recess of the terminal.

According to one aspect, breakage of the conductor can be prevented.

FIG. 1 is a perspective view illustrating an example of a motor according to a first embodiment. FIG. 2A is a front perspective view showing an example of an insulator to which a terminal is attached according to the first embodiment. FIG. FIG. 2B is a rear perspective view illustrating an example of an insulator to which a terminal is attached according to the first embodiment. FIG. 3 is a rear perspective view illustrating an example of the insulator according to the first embodiment. FIG. 4A is a front perspective view illustrating an example of an insulator around which a coil is wound in the first embodiment. FIG. FIG. 4B is a rear perspective view illustrating an example of the insulator around which a coil is wound in the first embodiment. FIG. 5 is a front view showing an example of a terminal according to the first embodiment. FIG. 6 is a front view showing a state in which the terminal is welded to the recess in the first embodiment. FIG. 7A is a front perspective view showing an example of an insulator to which a terminal is attached according to the second embodiment. FIG. 7B is a rear perspective view showing an example of an insulator to which a terminal is attached according to the second embodiment. FIG. 8 is a rear perspective view illustrating an example of an insulator according to the second embodiment. FIG. 9 is a perspective view showing an example of an insulator to which a terminal is attached according to the third embodiment. FIG. 10 is an enlarged perspective view showing an example of an insulator to which a terminal is attached according to the third embodiment. FIG. 11A is a front view showing an example of a terminal in a modified example. FIG. 11B is a front view showing an example of a terminal in another modified example.

The motor according to the embodiment will be described below with reference to the drawings. Note that the dimensional relationships of the elements in the drawings, the ratios of the elements, etc. may differ from reality. The drawings may also include parts with different dimensional relationships and ratios. To make the description easier to understand, each drawing may show a coordinate system that includes at least one of the axial, radial, and circumferential directions of the motor 1.

Figure 1 is a perspective view showing an example of a motor in the first embodiment. As shown in Figure 1, the motor 1 in the embodiment includes, for example, a stator 2, a frame 61, a rotor 62, and a rotating shaft (shaft) 63. The stator 2 is housed, for example, inside the frame 61. The stator 2 described in the embodiment is a stator in an inner rotor type brushless motor, and for example, a rotor 62 having a magnet as a component is arranged on the inner periphery of the stator 2, and a rotating shaft (shaft) 63 is further connected to this rotor 62. The motor 1 in which the stator 2 is mounted is used, for example, as an in-vehicle motor. It can also be applied to an outer rotor type brushless motor.

The stator 2 in the first embodiment includes a stator core 3 (not shown) having teeth 3a (described later), a plurality of insulators 10, and a coil 50. The stator core 3 in the first embodiment is configured, for example, by stacking a predetermined number of steel plates formed into an annular shape and made of a magnetic material such as silicon steel plate in the axial direction. The stator core 3 has an outer periphery, a plurality of teeth 3a (not shown) that form an inner periphery (magnetic pole portion) extending in the radial direction, and an intermediate portion that connects the outer periphery and the inner periphery. A coil 50 is wound around the intermediate portion via the insulator 10. The stator core 3 in the first embodiment includes, for example, 12 teeth 3a that are formed to be arranged at equal intervals in the circumferential direction.

In the first embodiment, the insulator 10 is attached to the teeth 3a of the stator core 3 from above in the axial direction, for example. The insulator 10 may further include a portion that is attached to the teeth 3a of the stator core 3 from below in the axial direction. The stator 2 in the first embodiment includes, for example, the same number (12) of insulators 10 as the number of teeth 3a. In the following, when each insulator 10 is to be expressed separately, they may be referred to as insulators 10α to 10μ. In FIG. 1, only insulators 10λ and 10δ are illustrated among the 12 insulators 10α to 10μ. Also, all of the 12 insulators 10α to 10μ have the same structure.

The insulator 10 is formed, for example, by injection molding using an insulating resin. FIG. 2A is a front perspective view showing an example of an insulator equipped with a terminal according to the first embodiment. FIG. 2B is a rear perspective view showing an example of an insulator equipped with a terminal according to the first embodiment. FIG. 3 is a rear perspective view showing an example of an insulator according to the first embodiment. As shown in FIGS. 2A to 3, the insulator 10 includes an outer peripheral portion 11, a wall portion 12, an inner peripheral portion 13, an insertion hole 14 as a hole portion, a connection portion 15, and a recess 18. A terminal 70, which will be described later, is inserted into the insertion hole 14 of the insulator 10.

The outer peripheral portion 11 of the insulator 10 faces the inner peripheral surface of the frame 61 shown in FIG. 1. The wall portion 12 is formed between the outer peripheral portion 11 and the connection portion 15. The inner peripheral portion 13 faces the outer peripheral surface of the rotor 62 shown in FIG. 1. The insertion hole 14 is, for example, a recess formed in the outer peripheral portion 11 and extending in the axial direction. The connection portion 15 is formed in a saddle shape so as to cover the middle portion of the stator core 3. The coil 50, which will be described later, is wound around the connection portion 15. The connection portion 15 may be formed to have a rounded edge, for example, as shown in FIG. 2A, in order to prevent the wound coil 50 from breaking.

The recess 18 is formed in the wall portion 12. The recess 18 is formed at a position facing the recess 78 of the terminal 70 to be inserted into the insertion hole 14 of the outer peripheral portion 11, as shown in Figs. 2A and 2B, for example. The recess 18 may be formed so that the boundaries between the bottom surface 18z and the side surfaces 18x and 18y, which will be described later, are rounded, as shown in Fig. 2A, for example, in order to prevent the lead wire 51 from being broken. The terminal 70 is formed, for example, by punching out a plate material that is a single conductive member. The conductive member is made of a metal with high electrical conductivity, such as copper or brass.

A coil 50 is wound around the connection portion 15 of the insulator 10. In the first embodiment, the conductor 51 drawn from the coil 50 is electrically connected to the terminal 70 via the recess 18. FIG. 4A is a front perspective view showing an example of an insulator around which a coil is wound in the first embodiment. FIG. 4B is a rear perspective view showing an example of an insulator around which a coil is wound in the first embodiment. Note that in FIGS. 4A and 4B, the lower portion of the insulator 10 and the teeth 3a are partially omitted. In addition, in FIGS. 4A and 4B, for the sake of convenience, the number of turns of the coil 50 is partially omitted.

As shown in Figures 4A and 4B, the coil 50 is wound around each intermediate portion of the stator core 3 via the connection portion 15 of the insulator 10. Note that the stator core 3 is not shown in Figures 4A and 4B. The conductor wire 51 drawn from the coil 50 is drawn radially outward from a recess 18 formed in the wall portion 12 of the insulator 10. The conductor wire 51 drawn from the recess 18 is inserted into the recess 78 of the terminal 70.

In the first embodiment, the outer peripheral portion 11 is formed such that the upper end face 11a in the axial direction is lower than the upper end face 12a in the axial direction of the wall portion 12, as shown in FIG. 2B, for example. In this configuration, the wall portion 12 in the first embodiment prevents the coil 50 wound around the connection portion 15 and the terminal 70 inserted into the insertion hole 14 of the outer peripheral portion 11 from coming into contact with each other.

Figure 5 is a front view showing an example of a terminal in the first embodiment. For example, as shown in Figure 5, the terminal 70 in the first embodiment includes a first conductive part 71 and a second conductive part 72, which are two conductive parts extending in one direction (axial direction in the illustrated example) and form a recess 78, an external connection terminal 73 as a protruding part protruding in one direction (axial direction) from the second conductive part 72, and a connecting part 74.

The two conductive parts, the first conductive part 71 and the second conductive part 72, are directly or indirectly connected. For example, the two conductive parts, the first conductive part 71 and the second conductive part 72, are connected to a connecting part 74 and are formed by branching off from this connecting part 74. The first conductive part 71 and the second conductive part 72 branch off in a direction intersecting the axial direction (for example, a direction perpendicular to the axial direction, in the drawing, the left-right direction from one of the first conductive part 71 and the second conductive part 72 to the other) and face each other across a recess 78. The recess 78 extends, for example, in one direction (axial direction).

The external connection terminal 73 extends in the axial direction from the second conductive portion 72. The external connection terminal 73 is electrically connected to an external device such as a power source or a wiring for connecting to another terminal.

The connecting portion 74 extends in the axial direction opposite to the external connection terminal 73. The connecting portion 74 is inserted into the insertion hole 14 of the insulator 10. The connecting portion 74 has a plurality of uneven portions 74a formed thereon.

In the first embodiment, the first conductive portion 71 has an inclined surface 71b formed on the axial side of the external connection terminal 73 (upper side in the drawing). The inclined surface 71b is inclined with respect to the direction in which the second conductive portion 72, which faces the first conductive portion 71, extends, and extends away from the second conductive portion 72. The distance between the inclined surface 71b and the second conductive portion 72 increases, for example, from the connecting portion 74 toward the external connection terminal 73.

The first conductive part 71 in the first embodiment includes an outer surface 71c and a protrusion 71d protruding from the outer surface 71c. The protrusion 71d protrudes, for example, on the opposite side of the second conductive part 72 in the width direction (left-right direction in the drawing). The width of the end of the first conductive part 71 is smaller than the width of the second conductive part 72, even including the width of the protrusion 71d. In other words, the bending rigidity of the first conductive part 71 is smaller than the bending rigidity of the second conductive part 72, and is easily deformed.

In the first embodiment, the conductor 51 is formed of a metal wire with high electrical conductivity, such as a copper wire, coated with a heat-resistant resin. When connecting the conductor 51 coated with heat-resistant resin to the terminal 70, the processing temperature is insufficient with ordinary soldering to melt the coating. Therefore, in the first embodiment, a fusing process (thermal crimping) is used in which an electric current is passed through the metal member forming the terminal 70 to generate heat, exposing the conductor (metal wire portion) of the conductor 51 and enabling electrical conduction with the terminal.

Figure 6 is a front view showing the state in which the terminal is welded to the recess in the first embodiment. Figure 6 (a) shows the state in which the conductor 51 is inserted into the recess 78 of the terminal 70 through the recess 18 of the insulator 10 from the inside to the outside in the radial direction. The terminal 70 and the conductor 51 inserted into the terminal 70 are deformed as shown in Figure 6 (b) by the thermal crimping process on the terminal 70. In Figure 6, the conductor 51a indicates the conductor 51 before it is deformed by the thermal crimping process, and the conductor 51b indicates the conductor 51 deformed by the thermal crimping process. Similarly, the terminal 70a indicates the terminal 70 before it is deformed by the thermal crimping process, and the terminal 70b indicates the terminal 70 deformed by the thermal crimping process.

In the first embodiment, the thermal crimping process is performed, for example, by pressing the electrodes 58 and 59 against the first conductive part 71 and the second conductive part 72 of the terminal 70a, in which the conductor 51a is inserted into the recess 78, from both sides in the circumferential direction, and passing a current through the terminal 70a. At that time, for example, the electrode 59 is fixed in contact with the second conductive part 72 of the terminal 70, and the electrode 58 presses the first conductive part 71 of the terminal 70a in the direction indicated by the arrow D. Then, the terminal 70a heats up as a result of passing a current from the electrodes 58 and 59 to the terminal 70a. As a result, the coating of the conductor 51a inserted into the recess 78 is peeled off, and the conductor 51 and the terminal 70 are welded together and electrically connected. The first conductive part 71 of the terminal 70 also deforms or moves under pressure from the electrode 58, and is connected to the second conductive part 72 at the portion 77.

The heat generated at the terminal 70 is also transmitted to the recess 18 of the insulator 10 through the conductor 51. As a result, a portion of the recess 18, which is made of resin, melts due to the heat, and the conductor 51 and the insulator 10 are also welded together. For example, at portion 52 shown in FIG. 6B, the coating is peeled off by the heat, and the deformed conductor 51b is welded to the bottom surface 18z of the recess 18 of the insulator 10, which is partially melted by the heat. The thermal crimping process fixes the conductor 51b to the recess 18 of the insulator 10, so that even if vibrations of the motor 1 are transmitted to the conductor 51b, the conductor 51b is prevented from coming off the insulator 10 and the terminal 70b. In addition, in FIG. 6, an example is described in which the bottom surface 18z of the recess 18 of the insulator 10 is welded to the conductor 51b, but this is not limited thereto, and the side surface 18x or 18y of the recess 18 may be welded to the conductor 51b.

As described above, the motor 1 in the first embodiment includes a stator 2. The stator 2 includes an insulator 10 having a wall portion 12, a coil 50, and a terminal 70. A recess 18 is formed in a portion of the wall portion 12, and a portion of the conductor 51 forming the coil 50 passes through the recess 18 of the insulator 10, and the conductor 51 is electrically connected to the terminal 70. With this configuration, the conductor 51 drawn from the coil 50 and connected to the terminal 70 is protected by the recess 18 of the insulator 10, so that breakage of the conductor in the motor 1 can be suppressed.

The terminal 70 may also have a recess 78, and the conductor 51 may be connected to the recess 78 of the terminal 70. In this case, the recess 18 of the insulator 10 and the recess 78 of the terminal 70 are arranged to face each other in the radial direction. This allows the conductor 51 drawn from the coil 50 to be easily routed to the recess 78 of the terminal 70.

The insulator 10 also has an outer periphery 11, which is formed so that the end face 11a is lower than the end face 12a of the wall portion 12 in the direction of the rotation axis, and the terminal 70 may be provided on the outer periphery 11. This allows the height of the stator 2, including the terminal 70, in the axial direction to be reduced.

The coil 50 may also be disposed on the opposite side of the wall 12 to the side on which the terminal 70 is located. With this configuration, the wall 12 can prevent the coil 50 from flowing into the terminal 70.

Also, the member forming the insulator 10 and a part of the conductor 51 may be bonded together. This allows the conductor 51 to be more securely fixed to the insulator 10.

Next, other embodiments and modifications of the present invention will be described. In each of the following embodiments and modifications, the same parts as those shown in the drawings described above will be given the same reference numerals, and duplicated descriptions will be omitted.

Second Embodiment
The insulator 20 in the second embodiment differs from the insulator 10 in the first embodiment in that a plurality of terminals 70 are inserted into the insulator 20. Fig. 7A is a front perspective view showing an example of the insulator to which the terminals in the second embodiment are attached. Fig. 7B is a rear perspective view showing an example of the insulator to which the terminals in the second embodiment are attached. Fig. 8 is a rear perspective view showing an example of the insulator in the second embodiment. As shown in Figs. 7A to 8, the insulator 20 includes an outer peripheral portion 21, a wall portion 22, an inner peripheral portion 13, two insertion holes 24m, 24n, a connection portion 15, and two recesses 28, 29. Terminals 70m, 70n are inserted into the insertion holes 24m, 24n of the insulator 20, respectively.

That is, in the second embodiment, multiple terminals 70m, 70n are inserted into the insulator 20, and the same number of recesses 28, 29 are formed as the number of terminals. In this case, as in the first embodiment, the recess 28 of the insulator 20 faces the recess 78m of the terminal 70m, and the recess 29 of the insulator 20 faces the recess 78n of the terminal 70n. Also, for example, when multiple conductors 51 are drawn out from the coil 50, one conductor 51 is electrically connected to the terminal 70m via the recess 28, and the other conductor 51 is electrically connected to the terminal 70n via the recess 29.

As described above, in the second embodiment, the wall portion 22 of the insulator 20 is formed with multiple recesses 28, 29, and multiple terminals 70m, 70n are provided on the outer periphery 21. As a result, even when multiple terminals 70 are provided on one insulator 20, the multiple conductors 51 are each protected by the recesses 28, 29 of the insulator 20, so that breakage of the conductors in the motor 1 can be suppressed.

[Third embodiment]
In the first embodiment, the outer circumferential portion 11 of the insulator 10 is formed so that the radial thickness is greatest near the center in the circumferential direction. In this case, when inserting the terminal 70 into the outer circumferential portion 11, it is preferable in terms of the strength of the insulator 10 that the terminal 70 is inserted into the portion of the outer circumferential portion 11 where the thickness is greatest.

Therefore, unlike the recess 18 of the insulator 10 in the first embodiment, the insulator 30 in the third embodiment has a recess 38 that does not extend radially, but is formed at an angle to the radial direction as shown in FIG. 9. FIG. 9 is a perspective view showing an example of an insulator to which a terminal in the third embodiment is attached. As shown in FIG. 9, the insulator 30 in the third embodiment is attached to the teeth 3a from above in the axial direction. Furthermore, in the third embodiment, the insulator 10 further includes a portion 40 that is attached to the teeth 3a of the stator core 3 from below in the axial direction, for example.

As shown in FIG. 9, the insulator 30 includes an outer periphery 31, a wall 32, an inner periphery 13, two insertion holes 34m, 34n, a connection portion 35, and two recesses 38, 39. Terminals 70m, 70n are inserted into the insertion holes 34m, 34n of the insulator 30, respectively. As shown in FIG. 9, in the insulator 30 of the third embodiment, the recesses 38 are formed at an angle to the radial direction so that they move from near the periphery of the outer periphery 31 toward the center as they move radially outward. Note that the connection portion 35 of the third embodiment has the same configuration as the connection portion 15 except for its shape, so a detailed description will be omitted.

In the third embodiment, the terminal 70 is also inserted into the insertion holes 34m, 34n formed in the outer periphery 31 of the insulator 30. The terminal 70 is arranged so that the recess 78 faces the recess 38 of the insulator 30. That is, the terminal 70 in the third embodiment is provided closer to the center of the outer periphery 31 in the circumferential direction than the terminal 70 in the first embodiment. In this configuration, the insertion hole 34m into which the terminal 70 is inserted can be formed in a position in the outer periphery 31 where the thickness in the radial direction is greater. This enhances the stability of the terminal 70 when it is inserted into the insulator 30.

In the third embodiment, the side surfaces 38x and 38y of the recess 38 of the insulator 30 may have protruding convex portions 38a and 38b formed thereon, as shown in FIG. 10. FIG. 10 is an enlarged perspective view showing an example of an insulator to which a terminal is attached in the third embodiment. FIG. 10 is an enlarged view of a portion shown by region F in FIG. 9. In this configuration, the conductor 51 inserted into the recess 38 from the inside in the radial direction is first bent in the circumferential direction by the convex portion 38a formed on the side surface 38x so as to move toward the center of the outer periphery 31. In other words, the convex portion 38a acts as a guide portion that guides the conductor 51 from the inner periphery side to the outer periphery side of the recess 38.

In the third embodiment, the conductor 51 guided by the convex portion 38a of the insulator 30 is further bent by the convex portion 38b formed on the side surface 38y so as to be directed toward the concave portion 78 of the terminal 70 that faces the concave portion 38. In other words, the convex portion 38b also acts as a guide portion that guides the conductor 51 from the inner peripheral side to the outer peripheral side of the concave portion 38.

As shown in FIG. 9, the insulator 30 in the third embodiment may have multiple terminals 70 inserted therein, similar to the insulator 20 in the second embodiment. In this case, the recesses in the insulator 30 may be formed according to the number of terminals 70 to be inserted therein. As shown in FIG. 9, for example, two recesses 38 and 39 are formed in the insulator 30 into which two terminals 70 are inserted.

As described above, in the third embodiment, the recess 38 of the insulator 30 may be formed at an angle to the radial direction of the motor 1, and the recess 38 of the insulator 30 and the recess 98 of the terminal 70 may face each other in the radial direction. In this case, the recess 38 of the insulator 30 may have protrusions 38a and 38b formed therein, and the direction of the conductor 51 inserted into the recess 38 of the insulator 30 may be changed by the protrusions 38a and 38b. With this configuration, even if the insertion hole 34m or 34n of the terminal 70 is provided near the center of the outer periphery 31 where the thickness in the radial direction is large, the conductor 51 drawn from the coil 50 can be easily connected to the terminal 70.

In addition, even if the conductor 51 drawn from the coil 50 is drawn near the peripheral edge of the insulator 10 in the circumferential direction, the occurrence of breakage of the conductor 51 can be prevented. Furthermore, when the conductor 51 drawn outward in the radial direction from the recess 18 of the insulator 10 is connected to the terminal 70 inserted near the center of the outer periphery 11 of the insulator 10, even if the distance between the coil 50 and the terminal 70 becomes large, the occurrence of breakage of the conductor 51 can be prevented.

Although the recess 38 has been described as guiding the conductor 51 from near the peripheral edge to near the center in the circumferential direction of the insulator 30, the embodiment is not limited to this. As shown in FIG. 9, for example, the recess 39 may be formed at an angle to the radial direction so that it approaches from near the center of the outer circumferential portion 31 to near the peripheral edge as it moves radially outward. In this case, the conductor 51 is guided from near the center to near the peripheral edge in the circumferential direction of the insulator 30.

Although an example has been described in which the recess 38 is formed at an angle to the radial direction of the motor 1, for example, the recess 38 may be formed at an angle to the axial direction of the motor 1. In other words, the height of the bottom surface of the recess 38 may be different on the inner and outer circumferential sides of the wall portion 32. This allows the conductor 51 to be guided to match the height of the bottom surface of the recess 78 of the terminal 70, for example.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications are possible without departing from the spirit of the present invention. For example, the shape of the terminal 70 is not limited to the above, and can be any shape. FIG. 11A is a front view showing an example of a terminal in a modified example. For example, as shown in FIG. 11A, the terminal 80 in the modified example includes a first conductive portion 81 and a second conductive portion 82, an external connection terminal 73, a connecting portion 74, and a recess 88.

The first conductive portion 81 and the second conductive portion 82 branch off in a direction intersecting the axial direction (for example, a direction perpendicular to the axial direction, which in the drawings is a left-right direction from one of the first conductive portion 81 and the second conductive portion 82 to the other) and face each other across the recess 88. The recess 88 extends, for example, in one direction (axial direction). In the first embodiment, the width of the recess 88 is set, for example, slightly smaller than the outer shape of the conductor 51.

As shown in FIG. 11A, in this modified example, the width W1 of the first conductive portion 81 of the terminal 80 in the direction perpendicular to the direction in which the external connection terminal 73 extends (the vertical direction in the drawing) (the horizontal direction in the drawing) is formed to be smaller than the width W2 of the second conductive portion 82.

In the first embodiment, one of the first conductive portion 81 and the second conductive portion 82 has a first recess 81a, and the other of the first conductive portion 81 and the second conductive portion 82 has a second recess 82a. The outer shape of the second recess 82a is the same as or smaller than the outer shape of the first recess 81a. The first recess 81a and the second recess 82a are opposed to each other. Specifically, as shown in FIG. 11A, the first recess 81a is formed on the surface of the first conductive portion 81 facing the second conductive portion 82. Similarly, the second recess 82a is formed on the surface of the second conductive portion 82 facing the first conductive portion 81. In the first embodiment, the first recess 81a and the second recess 82a are each formed in an approximately semicircular arc shape when viewed from the front, and are also formed opposite each other. As a result, the first recess 81a and the second recess 82a are joined together to form an approximately elliptical shape by thermal caulking. In the modified example, the conductor 51 is fixed in the area between the first recess 81a and the second recess 82a.

In the first embodiment, as shown in FIG. 11A, the first recess 81a and the second recess 82a have different heights in the axial direction. Specifically, the first recess 81a is located higher than the second recess 82a in the axial direction. Note that the modified example is not limited to this, and for example, the second recess 82a may be located higher than the first recess 81a in the axial direction.

Figure 11B is a front view showing an example of a terminal in another modified example. The terminal 90 in another modified example includes a first conductive portion 91 and a second conductive portion 92, an external connection terminal 73, a connecting portion 74, and a recess 98. The first conductive portion 91 in another modified example includes a first recess 91a, similar to the first conductive portion 81 of the terminal 80 shown in Figure 11A. The second conductive portion 92 in another modified example includes a second recess 92a, similar to the second conductive portion 82 of the terminal 80 shown in Figure 11A. In the other modified example, the conductor 51 is also fixed in the region between the first recess 81a and the second recess 82a.

In another modified terminal 90, the recess 98 has a portion 97 that is inclined in the direction of the rotation axis of the motor 1 away from the second conductive portion 92 with respect to the direction toward the portion where the first conductive portion 91 and the second conductive portion 92 branch off.

In addition, the configuration has been described in which the conductor 51 drawn from the coil 50 wound around the insulator is inserted into the recesses 18, 28, 29, 38, 39 of the insulator 10, 20, 30, but this is not limited to the configuration. For example, the conductor 51 drawn from the coil 50 wound around another insulator 10, 20, 30 or the conductor 51 connected to another terminal 70, 80, 90 may be inserted into the recesses 18, 28, 29, 38, 39.

In the above embodiment, the motor 1 is an inner rotor type brushless motor used for vehicle applications, but the motor 1 may be a motor used for purposes other than vehicle applications, an outer rotor type brushless motor, or other known motors such as a brushed motor or a stepping motor.

Furthermore, the present invention is not limited to the above-mentioned embodiment. The present invention also includes configurations in which the above-mentioned components are appropriately combined. Further modifications can be easily derived by those skilled in the art. Therefore, the broader aspects of the present invention are not limited to the above-mentioned embodiment, and various modifications are possible.

1 motor, 2 stator, 3 stator core, 10, 20, 30 insulator, 11, 21, 31 outer periphery, 12, 22, 32 wall, 13 inner periphery, 14, 24m, 24n, 34m, 34n insertion hole, 15, 35 connection, 18, 28, 29, 38, 39 recess, 50 coil, 51 conductor, 61 frame, 62 rotor, 63 rotating shaft, 70, 80, 90 terminal, 78, 88, 98 recess

Claims (8)

A stator is provided.
The stator includes:
an insulator having a wall portion;
A coil and
The terminals and
Equipped with
the terminal includes a connecting portion attached to the insulator, a first conductive portion and a second conductive portion branched from the connecting portion, and a recess formed by the first conductive portion and the second conductive portion,
A recess is formed in a portion of the wall,
A portion of the conductor forming the coil passes through a recess in the insulator,
the conductor is electrically connected to the terminal ;
The conductive wire is connected to the recess of the terminal.
Motor. The motor according to claim 1 , wherein the recess of the insulator and the recess of the terminal face each other in a radial direction. The insulator has an outer periphery,
In the rotation axis direction, the outer circumferential portion is formed such that an end face is lower than an end face of the wall portion,
The terminal is provided on the outer periphery.
3. The motor according to claim 1 or 2 . The motor according to claim 1 , wherein the coil is disposed on an opposite side of the wall portion to a side on which the terminal is disposed. 5. The motor according to claim 1, wherein a member forming the insulator and a part of the conductor passing through a recess of the insulator are bonded to each other. The insulator has an outer periphery,
A plurality of recesses including the recess are formed in the wall portion ,
The motor according to claim 1 , wherein a plurality of terminals including the terminal are provided on the outer circumferential portion. The recess of the insulator is formed obliquely with respect to a radial direction of the motor,
7. The motor according to claim 1 , wherein the recess of the insulator and the recess of the terminal face each other in a radial direction. A protrusion is formed in the recess of the insulator,
The motor according to claim 7 , wherein the direction of travel of the conductor inserted into the recess of the insulator is changed by the protrusion.

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