JP2017229111A - Stator and motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To securely insulate between a crossover of a stator of a motor and an inner peripheral surface of a housing.SOLUTION: A stator 3 comprises: a stator core having an annular part 30a fixed to a housing 10, and a plurality of teeth projecting on the inner periphery side of the annular part 30a; a coil part 33 wound around each tooth via an insulator 31; crossovers 34 circumferentially extended in positions separate from one end face of the stator core and from the inner peripheral surface of the housing 10 and connecting the coil parts 33 of the same phase; and an insulation wall 41 axially erected upright between the inner peripheral surface of the housing 10 and the crossovers 34 and formed from an insulator. The insulation wall 41 is locked in the housing 10 by a fixing structure provided integrally on the insulation wall 41. An axially extending area X of the insulation wall 41 includes an axial arrangement area Y of the crossovers 34.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a stator provided with an insulating wall that insulates between an inner peripheral surface of a housing and a crossover, and a motor including the stator.

  2. Description of the Related Art Conventionally, in an inner rotor type brushless motor, there is one in which a connecting wire that connects winding portions separated in the circumferential direction among a plurality of winding portions provided on a stator is arranged on the outer peripheral surface side of the insulator. That is, the crossover wire is disposed close to the inner peripheral surface of the metal housing. In such a motor, in order to satisfy a high withstand voltage requirement, it is important to improve the insulation between the inner peripheral surface of the housing and the crossover. For this, for example, a method of ensuring high insulation by placing a resin insulating member or a member coated with an insulating paint between the inner peripheral surface of the housing and the crossover (Patent Document). 1).

Japanese Patent Laying-Open No. 2015-52309

  However, in Patent Document 1 described above, the housing formed integrally with the insulating member is screwed to the housing, so that the insulating member is disposed between the inner peripheral surface of the housing and the crossover wire. The position of the member itself is not determined. Therefore, there is no way for the operator to check whether or not the insulating member is arranged at the correct position. That is, since it is impossible to grasp whether the insulating member is properly arranged up to the portion where the crossover wire exists without interfering with the crossover wire, the insulation between the crossover wire and the housing inner peripheral surface cannot be reliably ensured. There is a fear.

  The present invention has been devised in view of such problems, and an object thereof is to provide a stator and a motor that can reliably insulate between the crossover wire and the inner peripheral surface of the housing. . The present invention is not limited to this purpose, and is a function and effect derived from each configuration shown in the embodiment for carrying out the invention described later, and has another function and effect that cannot be obtained by conventional techniques. is there.

  (1) The stator disclosed herein includes an annular portion fixed to a housing and a stator core having a plurality of teeth portions protruding on the inner peripheral side of the annular portion, and an insulator for each of the plurality of teeth portions. A winding portion wound through, a connecting wire that extends in the circumferential direction at a position spaced from each of one end surface of the stator core and the inner peripheral surface of the housing, and connects the winding portions of the same phase; And an insulating wall that is erected in the axial direction between the inner peripheral surface of the housing and the connecting wire, and is formed of an insulator. The insulating wall is locked in the housing by a fixing structure provided integrally with the insulating wall, and the axially extending region of the insulating wall includes an axially arranged region of the crossover wires. It is a feature.

(2) It is preferable that the insulator has an insulating annular portion that is mounted on the annular portion of the stator core and guides the connecting wire, and an outer peripheral surface of the insulating annular portion abuts on the insulating wall. .
(3) It is preferable that the fixing structure is a snap-fit connection, and the insulating wall is locked to the insulator by the snap-fit connection.

(4) It is preferable that the stator includes a fastening part that extends in the circumferential direction a lead wire that supplies electricity from the outside of the housing to the winding portion in the housing. In this case, the fastening component is provided with a plurality of defining portions that define the position of the lead wire, and the insulation that is erected along the inner peripheral surface of the housing and connects the plurality of defining portions on the radially outer side. It is preferable to have an outer peripheral wall as a wall. The outer peripheral wall has a convex portion protruding radially inward at an end portion on the stator core side, and the insulator is placed on the annular portion of the stator core and the convex portion is It is preferable to have an insulating annular portion in which a concave portion to be engaged is formed.
(5) Moreover, the motor disclosed here is provided with the rotor and the stator as described in any one of the above (1) to (4).

  According to the disclosed stator, the insulating wall standing between the inner peripheral surface of the housing and the connecting wire is locked in the housing by the fixing structure provided integrally with the insulating wall, and the connecting wire is Since the axial region to be arranged is in the axial region where the insulating wall extends, it is possible to reliably insulate between the inner peripheral surface of the housing and the crossover.

It is an axial sectional view showing the motor concerning an embodiment disassembled. It is the perspective view which looked at the securing component provided in the motor of FIG. 1 from the downward direction. It is the perspective view which looked at the upper insulator provided in the motor of FIG. 1 from the downward direction. It is the A section enlarged view of FIG.

  A stator and a motor as embodiments will be described with reference to the drawings. The embodiment described below is merely an example, and there is no intention of excluding various modifications and technical applications that are not explicitly described in the following embodiment. Each configuration of the present embodiment can be implemented with various modifications without departing from the spirit thereof. Further, they can be selected as necessary, or can be appropriately combined. In the following description, the axial direction of the motor will be referred to as “vertical direction”, the bottom side of the housing will be described as “downward”, and the opening side will be described as “upward”.

[1. Constitution]
[1-1. overall structure]
FIG. 1 is an axially exploded sectional view of a brushless motor 1 (hereinafter referred to as “motor 1”) according to the present embodiment. The motor 1 is an inner rotor type brushless DC motor, and includes a columnar rotor 2 having a magnet 22, a stator 3 having a plurality of winding portions 33, and a housing 10 that forms an outline of the motor 1.

  As shown in FIG. 1, the rotor 2 includes a rotor core 21 that rotates integrally with the shaft 20, and a plurality of magnets 22 that are fixed to the rotor core 21. The shaft 20 is a rotating shaft that supports the rotor 2 and also functions as an output shaft that extracts the output (mechanical energy) of the motor 1 to the outside. The shaft 20 is provided with bearings 23 and 24 at two positions sandwiching the rotor core 21. In the present embodiment, the bearing 23 is provided at one end (lower end) of the shaft 20, and the bearing 24 is provided at the intermediate portion of the shaft 20.

  The stator 3 is a substantially cylindrical part having a space in which the rotor 2 is arranged in the center, and an annular stator core 30 that is press-fitted and fixed to the housing 10, insulating insulators 31 and 32, and a winding part 33 and a fastening part 35 that supports the lead wire 5 for power input. The stator core 30 includes a substantially cylindrical annular portion 30a and a plurality of teeth portions 30b that protrude from the inner peripheral side of the annular portion 30a and are provided at equal intervals in the circumferential direction. A pair of insulators 31 and 32 are attached to the stator core 30 from both sides in the axial direction (that is, from above and below).

  As shown in FIGS. 1 and 3, the upper insulator 31 attached from above the stator core 30 includes a side surface portion 31 a and an upper surface portion 31 c that cover both side surfaces and the upper surface of each tooth portion 30 b, and an inner peripheral surface of the annular portion 30 a ( It has an outer peripheral surface portion 31b covering an inner peripheral surface between adjacent tooth portions 30b) and an annular portion 31d (hereinafter referred to as “insulating annular portion 31d”) for connecting a plurality of sets of surface portions 31a to 31c in the circumferential direction. The insulating annular portion 31d is a portion placed on the annular portion 30a of the stator core 30, and is provided continuously with the upper surface portion 31c on the radially outer side of the upper surface portion 31c. The detailed configuration of the insulating annular portion 31d will be described later.

  As shown in FIG. 1, the lower insulator 32 attached from below the stator core 30 includes a side surface portion 32 a, an outer peripheral surface portion 32 b, a lower surface portion, and an insulating annular portion 32 d corresponding to the portions 31 a to 31 d of the upper insulator 31. When the two insulators 31 and 32 are attached to the stator core 30, the inner peripheral surface of the annular portion 30 a and the upper and lower surfaces and both side surfaces of each tooth portion 30 b are covered with the insulators 31 and 32. The coil is wound around each tooth portion 30 b covered with the insulators 31 and 32.

  The coil | winding part 33 is a part by which the coil was wound through the insulators 31 and 32 with respect to each of several teeth part 30b. The stator 3 of the present embodiment is provided with twelve winding portions 33 spaced apart from each other in the circumferential direction. Among these winding portions 33, the winding portions 33 having the same phase (that is, each of the U phase, the V phase, and the W phase) are connected by a jumper 34. The connecting wire 34 of the present embodiment extends in the circumferential direction at a position separated from the upper end surface of the stator core 30.

  The fastening component 35 is disposed above the stator core 30 in the housing 10 and defines the positions of the lead wires 5 at a plurality of locations spaced in the circumferential direction. The lead wire 5 supplies electricity from the outside of the housing 10 to the winding portion 33, and is connected to each phase (U phase, V phase, W phase) of the winding portion 33 in the housing 10 and each of the lead wires 5. Connected to the terminal corresponding to the phase. All of the three lead wires 5 are extended in the circumferential direction while avoiding the central space of the stator 3. The fastening part 35 has a function of fastening the lead wires 5 so that the positions of the lead wires 5 do not shift. The detailed configuration of the fastening part 35 will be described later.

  The housing 10 has a bottomed cylindrical shape (substantially cylindrical) with one end opened, and houses the rotor 2 and the stator 3. The housing 10 has a substantially cylindrical side wall 11 and a circular bottom 12, and an end bell 13 (lid) is attached to the upper end surface of the side wall 11 (upper surface opening of the housing 10). The housing 10 supports a part of the shaft 20 via the bearing 23. The connecting wire 34 is provided at a position separated from the inner peripheral surface of the side wall 11 of the housing 10.

[1-2. Main part configuration]
FIG. 4 shows an enlarged view of part A in FIG. The connecting wire 34 that connects the winding portions 33 of the same phase extends in the circumferential direction at positions spaced from the upper end surface of the stator core 30 and the inner peripheral surface of the housing 10. The stator 3 has an insulating wall 41 that is erected in the axial direction between the connecting wire 34 and the inner peripheral surface of the housing 10 and formed of an insulator (for example, resin). The insulating wall 41 is locked in the housing 10 by a fixing structure provided integrally with the insulating wall 41. In the present embodiment, snap-fit coupling is adopted as the fixing structure, and the insulating wall 41 is locked to the upper insulator 31 by this snap-fit coupling.

  As shown in FIGS. 2 and 4, the insulating wall 41 of the present embodiment has a convex portion 41 b that protrudes radially inward at an end portion (hereinafter referred to as “lower end portion 41 a”) on the stator core 30 side. . As shown in FIGS. 3 and 4, the upper insulator 31 of the present embodiment includes a recess 31 g that is recessed in the radially outer and lower corner of the insulating annular portion 31 d. A convex portion 41b provided integrally with the insulating wall 41 is engaged with the concave portion 31g. That is, when the insulating wall 41 is attached to the upper insulator 31 from above, the convex portion 41 b of the insulating wall 41 fits into the concave portion 31 g of the upper insulator 31, and the insulating wall 41 is snap-fit coupled to the upper insulator 31. In the present embodiment, a plurality of convex portions 41b having the same shape are provided apart from each other in the circumferential direction of the insulating wall 41, and a concave portion 31g is provided in the circumferential direction of the upper insulator 31 so as to correspond to the convex portions 41b. It is done.

  Further, in the stator 3 of the present embodiment, as shown in FIG. 4, the axially extending region X of the insulating wall 41 includes the axially arranged region Y of the crossover wire 34. The axially extending region X of the insulating wall 41 means a region where the insulating wall 41 standing in the axial direction is present. Moreover, the axial direction arrangement | positioning area | region Y of the connecting wire 34 means the axial direction area | region where the connecting wire 34 extended in the circumferential direction can be arrange | positioned. In the actual product, the position of the crossover 34 (including the position in the axial direction) may vary with respect to the design value. That is, there is a possibility that the actual position of the crossover 34 is shifted in the vertical direction or the radial direction with respect to the position of the design drawing. Further, depending on the circumferential position of the stator 3, there is a portion where a plurality of crossover wires 34 are arranged in the axial direction. An axial region in which the crossover lines 34 may be arranged in consideration of such a shift and the number of the crossover wires 34 is defined as “an axial arrangement region Y of the crossover wires 34”. The axially extending region X of the insulating wall 41 is provided as a region including the axially arranged region Y. The convex portions 41b and the concave portions 31g are disposed below the axial direction arrangement region Y. For this reason, the insulating wall 41 is naturally fixed so that the axially extending region X includes the axially arranged region Y by the snap-fit coupling.

  The crossover wire 34 of the present embodiment is guided by the upper insulator 31 so as to extend in the circumferential direction. In other words, the upper insulator 31 is provided with a guide portion that extends the connecting wire 34 in the circumferential direction. In this embodiment, as shown in FIGS. 3 and 4, the insulating annular portion 31 d of the upper insulator 31 and the plurality of guide wall portions 31 f erected on the upper surface of the insulating annular portion 31 d are used as a guide for the crossover 34. It has a function. The insulating annular portion 31d is located between the connecting wire 34 and the stator core 30 and guides the connecting wire 34 from below. Furthermore, the insulating annular portion 31d is provided with its outer peripheral surface in contact with the insulating wall 41. Thereby, since the lower part of the crossover 34 is covered with the insulating wall 41 and the upper insulator 31, the insulating property is improved also in this portion.

  The guide wall portion 31f is erected on the radially inner portion of the insulating annular portion 31d, and the inner peripheral surface of the guide wall portion 31f forms the same surface as the inner peripheral surface of the outer peripheral surface portion 31b. A plurality of guide wall portions 31f are provided in the circumferential direction of the insulating annular portion 31d, and guide the crossover wires 34 from the radially inner side. Furthermore, the guide wall portion 31f of the present embodiment has a protruding guide convex portion 31h that protrudes radially outward. The connecting wire 34 extends in the circumferential direction along the upper surface of the insulating annular portion 31d and the outer peripheral surface of the guide wall portion 31f, or along the guide convex portion 31h and the guide wall portion 31f. When two crossover wires 34 are arranged in the axial direction, the crossover wires 34 are placed along both the upper surface of the insulating annular portion 31d, the guide convex portion 31h, and the guide wall portion 31f.

  The insulating wall 41 of the present embodiment is provided as a part of the fastening part 35. In other words, a part of the fastening part 35 has a function as the insulating wall 41 described above. The fastening part 35 of this embodiment is integrally formed by resin molding, for example. As shown in FIG. 2, the fastening part 35 includes an annular outer peripheral wall (hereinafter referred to as “outer peripheral wall 41”) having a function as an insulating wall 41, an annular inner peripheral wall 42, and these peripheral walls 41. , 42 is provided with a plurality of defining portions 40 for radially connecting a plurality of locations, and a connecting portion 43 for connecting a part between the peripheral walls 41, 42.

  The defining portion 40 is a portion that defines the position of the lead wire 5, and is provided radially with respect to the axis C. As shown in FIG. 2, each defining portion 40 is formed with a groove opened upward or downward, and the lead wire 5 is held in the groove by accommodating the lead wire 5. As shown in FIG. 1, each defining portion 40 is disposed in a space (slot) between winding portions 33 adjacent in the circumferential direction, and is in a non-contact state with respect to the winding portion 33. Each defining portion 40 is disposed at a position overlapping the winding portion 33 in a cross-sectional view along the axial direction (or when viewed from the circumferential direction). As a result, the axial position of the lead wire 5 is brought as close as possible to the winding portion 33.

  The outer peripheral wall 41 is a portion that is erected so as to be disposed along the inner peripheral surface of the side wall 11 of the housing 10 and connects the plurality of defining portions 40 on the radially outer side, and functions as the insulating wall 41 described above. . That is, a plurality of convex portions 41b are integrally provided at the lower end portion 41a of the outer peripheral wall 41, and these convex portions 41b engage with the concave portions 31g of the insulating annular portion 31d, so that the fastening part 35 is connected to the upper insulator. It is latched by 31 and is housed and arranged in the housing 10. Each convex part 41b of this embodiment is arrange | positioned at the radial direction outer side of each prescription | regulation part 40. As shown in FIG.

  As shown in FIG. 4, the outer peripheral wall 41 of the present embodiment is formed in an L-shaped cross section that is bent radially inward from an end portion opposite to the stator core 30 (hereinafter referred to as “upper end portion 41 c”). Yes. That is, the outer peripheral wall 41 has a flat planar portion 41d that is provided continuously on the radially inner side of the upper end portion 41c and extends in a direction orthogonal to the axial direction. The flat surface portion 41d is disposed so as to cover the crossover 34, the insulating annular portion 31d of the upper insulator 31, and the guide wall portion 31f, and is connected to the upper portion of the defining portion 40 on the radially inner side. That is, since the upper part of the crossover 34 is covered with the outer peripheral wall 41, the insulating property is also improved in this portion.

  As shown in FIGS. 1 and 2, the inner peripheral wall 42 is a portion that is erected on the radially inner side of the outer peripheral wall 41 in the same manner as the outer peripheral wall 41 and connects a plurality of defining portions 40 on the inner side. The inner peripheral wall 42 of this embodiment is provided continuously with the inner upper part of the defining portion 40, and the inner peripheral surface of the inner peripheral wall 42 and the inner peripheral surface of the defining portion 40 form the same surface. The connecting portion 43 is a fan-shaped surface portion provided with three cylindrical portions 43 a through which terminals (not shown) connected to the lead wires 5 are inserted. The three lead wires 5 held by the defining portion 40 are connected to the respective terminals below the connecting portion 43.

[2. effect]
(1) In the stator 3 described above, the insulating wall 41 is provided between the connecting wire 34 that connects the in-phase winding portions 33 and the inner peripheral surface of the housing 10. The insulating wall 41 is locked in the housing 10 by a fixed structure (for example, snap-fit coupling) provided integrally, and the axial extension region X of the insulating wall 41 is the axial arrangement region Y of the crossover 34. including. Thereby, for example, even when the position of the crossover line 34 varies with respect to the position of the design drawing, if the insulating wall 41 is locked, the insulating wall 41 is more reliable than the upper end portion of the crossover line 34. It extends to the upper side, and extends to the lower side more reliably than the lower end portion of the crossover wire 34. For this reason, between the crossover wire 34 and the inner peripheral surface of the housing 10 can be reliably insulated. That is, in all the stators 3, it is possible to reliably ensure insulation between the crossover wires 34 and the inner peripheral surface of the housing 10.

(2) In the stator 3 described above, since the outer peripheral surface of the insulating annular portion 31d contacts the insulating wall 41, the lower part of the crossover wire 34 can be covered with two insulators, and the insulation can be improved. .
(3) Moreover, since the insulating wall 41 mentioned above is latched by the upper insulator 31 by a snap fit coupling | bonding, a structure can be simplified compared with the case where it latches to the stator core 30, the housing 10, etc., for example. In addition, if both the insulating wall 41 and the upper insulator 31 are made of resin, both are easily elastically deformed, so that snap-fit coupling is easy, and workability can be improved. Furthermore, since the insulating wall 41 is locked by the snap-fit coupling, the operator can grasp that the insulating wall 41 is “fixed after being positioned at an appropriate position” from the response. Thereby, workability can be improved and product variations of the stator 3 can be eliminated.

(4) In the stator 3 described above, the outer wall 41 of the fastening part 35 that extends the lead wire 5 in the circumferential direction in the housing 10 is provided with the function as the insulating wall 41 described above. That is, by using the outer peripheral wall 41 of the fastening part 35 as the insulating wall 41 described above, the position of the lead wire 5 can be defined and the insulation of the crossover 34 can be improved without increasing the number of parts. Can do. Moreover, in this embodiment, since the convex part 41b of the outer peripheral wall 41 is provided in the lower end part 41a with the largest amount of elastic deformation to radial direction, it can be snap-fit-coupled with a small force.
(5) Moreover, according to the motor 1 provided with the stator 3 mentioned above, the effect similar to (1)-(4) mentioned above can be acquired.

[3. Others]
In the stator 3 described above, the insulating wall 41 is attached to the upper insulator 31 from above, and the configuration in which the convex portion 41b is snap-fitted by fitting into the concave portion 31g is exemplified. The fixing structure to be stopped is not limited to the one described above. Examples of the fixing structure include a structure that is mechanically fixed (locked) such as screwing and press-fitting, and a structure that is not mechanically fixed but is thermally welded or bonded. In the case of screwing, for example, it is conceivable to provide a screw hole (female screw) in a part of the insulating wall 41. In the case of press-fitting, for example, a configuration in which the lower end portion of the insulating wall 41 or the vicinity thereof is press-fitted into a part of the upper insulator 31 is provided in the insulating wall 41, and the lower end portion of the insulating wall 41 is made a part of the upper insulator 31. It is conceivable to use a structure that is positioned by abutting. Further, in the case of heat welding or bonding, for example, the insulating wall 41 is abutted against the upper insulator 31 so that the axially extending region X of the insulating wall 41 includes the axially arranged region Y of the crossover wire 34. It is conceivable to provide the insulating wall 41 with a positioning structure such as providing a portion. At least a part of the fixing structure may be provided integrally with the insulating wall 41, and the insulating wall 41 may be positioned and fixed at a predetermined position.

  In addition, a configuration other than the above-described configuration is conceivable for locking by snap-fit coupling. For example, an axial guide groove and a circumferential guide groove connecting the guide groove and the recess 31g may be added to the above-described insulating annular portion 31d. That is, the convex portion 41b of the insulating wall 41 is caused to enter along the axial guide groove to align the axial direction position of the insulating wall 41, and then the insulating wall 41 is turned so that the convex portion 41b is aligned with the circumferential guide groove. It is good also as a structure which carries out a snap fit coupling | bonding by making it move and fitting in the recessed part 31g.

  With such a configuration, since the amount of elastic deformation of the insulating wall 41 toward the outside in the radial direction is small, the possibility that the insulating wall 41 is cracked or deformed can be avoided. In the case of this configuration, by providing a protrusion over which the convex portion 41b rides between the circumferential guide groove and the concave portion 31g, it is possible to prevent the displacement of the circumferential position after the insulating wall 41 is mounted. . In such a configuration, the circumferential guide groove may be spiral, or the depth of the groove may be gradually increased.

  In the above-described embodiment, a plurality of convex portions 41b having the same shape are provided in the circumferential direction of the insulating wall 41, but the shapes of these convex portions 41b may not be all the same. For example, the circumferential dimension of one convex portion 41b may be different from the length of the other convex portion 41b, and the circumferential dimension of the concave portion 31g corresponding to this one convex portion 41b may be similarly changed. By setting it as such a structure, the alignment of the circumferential direction of the insulating wall 41 can be performed. The axial position of the convex portion 41b is not limited to the lower end portion 41a of the insulating wall 41, but may be provided between the upper end portion 41c and the lower end portion 41a.

In the above-described embodiment, the configuration in which the outer peripheral wall 41 of the fastening part 35 has a function as the insulating wall 41 that insulates between the crossover wire 34 and the inner peripheral surface of the housing 10 has been described. The configuration of the wall 41 is not limited to this. For example, a dedicated part having the function of the insulating wall 41 may be provided, or a part other than the fastening part 35 that holds the lead wire 5 may have the function of the insulating wall 41. In addition, the plane part 41d may be omitted from the insulating wall 41 and may have an I-shaped cross section.
Further, the object to which the insulating wall 41 is locked is not limited to the upper insulator 31 but may be the stator core 30 or the housing 10.

  Further, the crossover wire 34 may extend in the circumferential direction below the stator core 30. In this case, the insulating wall 41 may be disposed below the stator core 30. In this case, the insulating wall 41 may be locked to the lower insulator 32 by, for example, snap-fit coupling. At least an insulating wall erected in the axial direction between the crossover wire 34 and the inner peripheral surface of the housing 10, which is locked in the housing by a snap-fit coupling and extends in the axial direction It suffices that the region X includes the axial arrangement region Y of the crossover line 34.

  In addition, each structure of the stator 3 and the motor 1 demonstrated by said embodiment is an example, Comprising: It is not restricted to what was mentioned above. That is, the shapes and configurations of the rotor 2, the stator 3, and the housing 10 are not limited to those described above, and the arrangement and lead-out positions of the lead wires 5 are not limited to those described above. For example, the insulators 31 and 32 may not be divided vertically, and the fastening part 35 may be omitted from the stator 3. In addition, the upper insulator 31 may not have the function of guiding the connecting wire 34, and even if the upper insulator 31 has the function of guiding the connecting wire 34, the insulating annular portion 31 d has the shape and configuration described above. Not necessarily.

  In the above-described embodiment, the vertical motor 1 that pulls out the lead wire 5 from the end bell 13 is illustrated. However, a lateral motor that pulls out the lead wire 5 from the side wall 11 of the housing 10 in the radial direction, The insulating wall 41 described above can also be applied to a motor that pulls out a signal line in a different direction.

1 Motor (brushless motor)
2 Rotor 3 Stator 30 Stator core 30a Annular part 30b Teeth part 31 Upper insulator 31d Insulated annular part 32 Lower insulator 33 Winding part 34 Crossover 35 Fastening part 40 Specified part 41 Insulating wall, outer peripheral wall 41a Lower end part 41b Convex part 10 Housing X Axial extension area of insulating wall Y Axial arrangement area of crossover

Claims (5)

A stator core having an annular portion fixed to the housing and a plurality of teeth protruding from the inner peripheral side of the annular portion;
A winding portion wound via an insulator for each of the plurality of teeth portions;
A connecting wire that extends in the circumferential direction at a position spaced from each of the one end surface of the stator core and the inner peripheral surface of the housing, and connects the winding portions of the same phase;
An insulating wall that is erected in the axial direction between the inner peripheral surface of the housing and the crossover, and is formed of an insulator;
The insulating wall is locked in the housing by a fixing structure provided integrally with the insulating wall, and
The stator according to claim 1, wherein the axially extending region of the insulating wall includes an axially disposed region of the crossover wires. The insulator has an insulating annular portion that is placed on the annular portion of the stator core and guides the jumper wire,
The stator according to claim 1, wherein an outer peripheral surface of the insulating annular portion is in contact with the insulating wall. The fixing structure is a snap-fit connection;
The stator according to claim 1, wherein the insulating wall is locked to the insulator by the snap-fit coupling. In the housing, comprising a fastening part for extending a lead wire for supplying electricity from the outside of the housing to the winding portion in the circumferential direction,
The fastening part is a plurality of defining portions that define the position of the lead wire, and the insulating wall that is erected along the inner peripheral surface of the housing and connects the plurality of defining portions on the radially outer side. An outer peripheral wall,
The outer peripheral wall has a convex portion projecting radially inward at an end on the stator core side,
4. The insulator according to claim 1, wherein the insulator has an insulating annular portion that is placed on the annular portion of the stator core and is formed with a concave portion that engages with the convex portion. 5. The stator described. A rotor,
The stator according to any one of claims 1 to 4,
A motor comprising:

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