JP2006094678A - Brushless motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a brushless motor in which the positioning of a sensor stator can be carried out with high precision in the circumferential direction without lowering the function of a resolver as a rotation angle sensor and without increasing manufacturing cost. <P>SOLUTION: An end plate 12 is formed with elongated holes 47 and 50 extending along the circumferential direction, and a clamp plate is formed with a plurality of engaging pawls for engaging with respective engaging grooves formed in a sensor stator and stopping the clamp plate and the sensor stator not to move relatively in the circumferential direction wherein a through hole 51 is formed at a position corresponding to the elongated hole 50. The clamp plate is fastened to the end plate 12 by means of bolts 44 inserted into respective elongated holes 47 from the outside of the end plate 12, and the sensor stator fitted idly in the containing recess of the end plate 12 is held between the end plate and the clamp plate thus pressure securing the sensor stator to the end plate. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a brushless motor in which a resolver as a rotation angle sensor is previously incorporated in a motor case.

  When driving a brushless motor, in order to obtain smooth rotation and smooth output characteristics, so-called sine wave drive in which sine wave AC voltages having different phases are applied to the motor coils of each phase is indispensable. A rotation angle sensor used for control is also required to have higher accuracy.

  Therefore, in such applications, it is common to use a resolver capable of analog detection of the rotation angle as the rotation angle sensor. Conventionally, a resolver as such a rotation angle sensor is previously installed in a motor case in a brassless motor. (For example, refer to Patent Document 1).

  By the way, the resolver detects the rotation angle of the rotor (rotating shaft) in an analog manner based on the relative rotation between the sensor rotor and the sensor stator. Therefore, when assembling the sensor rotor, it is necessary to accurately set the circumferential positional relationship between the sensor rotor and the sensor stator.

  In view of this point, in the above-described conventional brushless motor, the sensor stator is loosely fitted in a circular housing recess formed on the inner side of the motor end plate. Protruding protrusions are provided. Further, the motor end plate is provided with a pair of adjustment bolts for clamping the protrusion from both sides in the circumferential direction in the assembled state. The sensor stator is pressed and fixed so as to be slidable in the circumferential direction in the temporarily assembled state by being sandwiched between the motor end plate and a fixing member fastened to the motor end plate.

With such a configuration, it is possible to finely adjust the circumferential position of the sensor stator by changing the tightening balance of the two adjusting bolts, and when the fastening of the fixing member is loosened due to vibration of the motor or the like. However, the circumferential position does not shift. Therefore, the circumferential position of the sensor stator can be set with high accuracy and high reliability can be ensured.
JP 2003-32989 A

  However, since the conventional brushless motor has a configuration in which the sensor stator is directly sandwiched between the two adjusting bolts, the function of the resolver as the rotation angle sensor may be deteriorated. In addition, the configuration becomes complicated by providing these adjustment bolts, and it is necessary to take measures against water exposure by forming through holes for supporting each adjustment bolt in the motor radial direction, resulting in an increase in manufacturing cost. There is a problem of inviting.

  The present invention has been made to solve the above-described problems, and its object is to achieve a highly accurate circumferential direction of the sensor stator without causing a decrease in function and an increase in manufacturing cost of a resolver as a rotation angle sensor. It is an object of the present invention to provide a brassless motor capable of positioning the motor.

  In order to solve the above problems, the invention according to claim 1 is a resolver comprising a sensor rotor that rotates integrally with a motor rotating shaft, and an annular sensor stator that is fixed to the motor case and disposed outside the sensor rotor. The sensor stator is loosely fitted in a housing recess formed inside the end plate that closes the opening of the motor case body, and is sandwiched between a fixing member fastened to the end plate. Thus, the brushless motor is pressed and fixed to the end plate, and a plurality of elongated holes extending in the circumferential direction are formed in the end plate, and at least one inserted through the elongated holes from the outside of the end plate. The fixing member is fastened with a fastening screw, and the fixing member and the sensor stator are circumferentially connected to the fixing member. In a locking means for relatively immovable locking, by providing an operable position adjusting means via the slot so as to change the circumferential position of the fixing member, and the gist.

  According to a second aspect of the present invention, there is provided a resolver including a sensor rotor that rotates integrally with a motor rotating shaft and an annular sensor stator that is fixed to the motor case and disposed outside the sensor rotor. It is loosely fitted in a housing recess formed inside the end plate that closes the opening of the case body, and is fixed to the end plate by being sandwiched between a fixing member fastened to the end plate. A brushless motor, wherein a long hole extending in the circumferential direction is formed in the fixing member, the fixing member is fastened by a fastening screw inserted through the long hole, and the end plate is circumferentially fixed. The fixing member is engaged with the fixing member and the sensor stator so that they cannot move relative to each other in the circumferential direction. A locking means for, by providing an operable position adjusting means through a long hole formed in the end plate so as to change the circumferential position of the fixing member, and the gist.

The gist of the invention described in claim 3 is that the position adjusting means is a through hole or a recess formed at a position corresponding to the long hole formed in the end plate.
According to a fourth aspect of the present invention, the locking means is engaged with an engagement protrusion that is engaged with an engagement recess formed in the sensor stator or an engagement protrusion formed on the sensor stator. The gist of the present invention is that the engaging recess is made.

The gist of the invention described in claim 5 is that a fastening recess that can be fastened through a screw hole into which the fastening screw is screwed is formed at the tip of the fastening screw.
The gist of the invention described in claim 6 is that the bearing that pivotally supports the rotating shaft is provided on the outer side in the axial direction than the housing recess.

The gist of the invention described in claim 7 is that a power feeding portion for supplying driving power to the motor coil of the motor stator is provided in the end plate.
(Function)
According to the first and second aspects of the present invention, in a state where the fastening force of the fastening screw is weak, that is, in the temporarily assembled state, the sensor stator can slide along the circumferential direction in the housing recess, and the fixing member Moreover, it can slide along the circumferential direction by changing the position of the fastening screw in the long hole. The sensor stator and the fixing member are locked by the locking means so as not to move relative to each other in the circumferential direction.

  Therefore, the position of the sensor stator in the circumferential direction can be adjusted together with the fixing member by operating the position adjusting means provided on the fixing member through the long hole from the outside of the motor case. That is, after the assembly of the brushless motor, the sensor stator can be set from the outside of the motor case to the optimum position including the components constituting the brushless motor and assembly errors. In addition, the manufacturing cost can be reduced because the configuration is simple and there is no need to take special measures against water exposure. In addition, it is easy to retighten the fastening screw. Further, unlike the conventional example, since a direct load is not applied to the sensor stator, the function of the resolver as the rotation angle sensor is not deteriorated.

  In particular, in the configuration according to claim 2, since the screw hole into which the fastening screw is screwed is provided in the end plate, and it is possible to form many screw grooves, the fastening state is stable. In addition, the fastening operation is facilitated by fixing the screw position.

  According to the invention described in claim 3, for example, by inserting a rod-like or needle-like operation pin that can be inserted into the through hole or the recess from the long hole and moving it along the long hole, The direction can be changed. Accordingly, the circumferential position of the sensor stator can be easily and reliably adjusted from the outside of the motor case with a simple configuration.

According to the fourth aspect of the invention, the sensor stator and the fixing member can be reliably locked with a simple configuration so as not to be relatively movable in the circumferential direction.
According to the invention described in claim 5, it is possible to fasten the fastening screw at both ends of the fastening screw, and as a result, the fastening work is facilitated. In particular, in the configuration of the second aspect, the fastening screw is inserted into the elongated hole from the inside of the end plate. By adopting this configuration, the fastening operation can be performed from the outside of the motor case. The efficiency of the fastening operation can be greatly improved.

  According to the sixth aspect of the present invention, since the vibration of the rotating shaft due to the output load is difficult to be transmitted to the sensor rotor, it is possible to stably detect the rotation angle by preventing the resolver function from being lowered during the output load. .

  According to the seventh aspect of the present invention, the power supply wiring to the motor coil and the input / output wiring to the sensor coil of the resolver can be integrated to shorten the brushless motor.

  ADVANTAGE OF THE INVENTION According to this invention, the brassless motor which can position the circumferential direction of a sensor stator with high precision can be provided, without causing the function fall of the resolver as a rotation angle sensor, and the raise of manufacturing cost.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
FIG. 1 is a top view of an end plate to which a sensor stator is assembled, and FIG.

  As shown in FIG. 2, the brushless motor 1 of the present embodiment includes an annular stator 4 having a plurality of teeth 3 around which a motor coil 2 is wound, and a rotating shaft 5 that is disposed inside the stator 4 and integrated with the rotating shaft 5. A rotating rotor 6 and a resolver 7 as a rotation angle sensor for detecting the rotation angle of the rotation shaft 5 are provided.

  The motor case 10 of this embodiment includes a motor case main body 11 formed in a bottomed cylindrical shape and an end plate 12 that closes an opening 11 a of the motor case main body 11, and the stator 4 is a motor case main body 11. The rotating shaft 5 is rotatably supported by bearings 13 and 14 provided on the bottom 11b of the motor case main body 11 and the end plate 12. The rotor 6 is disposed inside the stator 4 by being fixed to the rotating shaft 5.

  The brushless motor 1 of the present embodiment is a surface magnet type synchronous motor (SPM) in which a magnet 15 is arranged on the outer peripheral surface of a rotor 6, and the rotor 6 is connected to a motor coil 2 of each phase (U, V, W). When the three-phase drive power is supplied, it rotates together with the rotating shaft 5. In this embodiment, the end plate 12 is provided with a connector 16 as a power feeding unit, and three-phase drive power generated by a PWM inverter (not shown) is passed through this connector 16 to each phase. The motor coil 2 is supplied.

  On the other hand, the resolver 7 includes a sensor rotor 21 that is fixed to the rotating shaft 5 and rotates integrally with the rotating shaft 5, and an annular sensor stator 22 that is fixed to the motor case 10 and disposed outside the sensor rotor 21. ing.

  In the present embodiment, the sensor rotor 21 is formed by laminating magnetic steel plates, and as shown in FIGS. 3A and 3B, the sensor stator 22 is provided on the annular portion 23 and the annular portion 23. A plurality of teeth 24 and a sensor coil 25 wound around the teeth 24 are provided. In the present embodiment, the tooth 24 of the sensor stator 22 has a two-phase output (an output signal corresponding to the rotation of the sensor rotor 21 and a one-phase excitation coil to which an excitation voltage is applied as the sensor coil 25). sin phase and cos phase) output coils are respectively wound around predetermined positions. And based on the change of the output signal of each phase accompanying rotation of the sensor rotor 21, it is possible to detect the rotation angle of the rotating shaft 5 that rotates integrally with the sensor rotor 21.

Next, the resolver fixing structure in the brushless motor of this embodiment will be described.
As shown in FIG. 2, in the present embodiment, the inner side surface 12 a of the end plate 12 is formed with a circular accommodation recess 32 concentric with the insertion hole 31 through which the rotary shaft 5 is inserted and the bearing 14. The sensor stator 22 is loosely fitted in the receiving recess 32 so as to be rotatable. Specifically, a step portion 33 is formed on the outer peripheral edge of the housing recess 32, and the sensor stator 22 is configured such that the annular portion 23 (see FIGS. 3A and 3B) abuts on the step portion 33. Are accommodated in the accommodating recess 32. In the present embodiment, the bearing 14 on the end plate 12 side is provided on the outer side in the axial direction than the housing recess 32. The rotating shaft 5 has an output end on the end plate 12 side.

  Further, an elastic plate 34 as a fixing member for fixing the sensor stator 22 to the end plate 12 is fastened to the inner side surface 12 a of the end plate 12. The sensor stator 22 is pressed and fixed to the end plate 12 by the annular portion 23 being sandwiched between the pressure plate 34 and the accommodating recess 32 (the step portion 33 thereof). .

  More specifically, as shown in FIGS. 4 (a) and 4 (b), the elastic plate 34 is formed in a bottomed cylindrical shape, and a flange extending outward in the radial direction is formed at the opening end of the cylindrical portion 41. A portion 42 is formed. A plurality of (two) fastening portions 43 projecting radially outward are provided on the outer peripheral edge of the flange portion 42, and the fastening plate 43 is fastened to the end plate 12 at each fastening portion 43. A screw hole 45 into which a bolt 44 (see FIG. 2) as a fastening screw is screwed is formed. An insertion hole 46 through which the rotation shaft 5 is inserted is formed in the bottom 41 b of the elastic plate 34.

  On the other hand, as shown in FIG. 1, the end plate 12 is provided with a plurality of long holes 47 extending along the circumferential direction, and each bolt 44 is connected to each of these from the outside of the end plate 12. By being inserted into the long holes 47, the screw holes 45 are screwed into the screw holes 45 of the elastic plate 34. That is, each screw hole 45 of the elastic plate 34 and each long hole 47 of the end plate 12 are formed at positions corresponding to each other. As shown in FIG. 2, the elastic plate 34 is fastened to the inner side surface 12 a of the end plate 12 so that the flange portion 42 abuts on the annular portion 23 of the sensor stator 22, and the flange portion 42 and the accommodation recess 32. By sandwiching the annular portion 23 of the sensor stator 22 between the step portion 33 and the step portion 33, the sensor stator 22 is pressed and fixed to the end plate 12.

  In the present embodiment, as shown in FIGS. 3A and 3B, a plurality of engagement grooves 48 extending along the axial direction are formed on the outer peripheral edge of the annular portion 23 of the sensor stator 22. 4 (a) and 4 (b), the flange portion 42 of the elastic plate 34 has a plurality of engagement claws that are engaged with the engagement grooves 48 at positions corresponding to the engagement grooves 48. 49 is provided. Then, as shown in FIG. 5, in the assembled state of the end plate 12, the sensor stator 22 is surrounded by the elastic plate 34 by the engagement of the engagement grooves 48 and the engagement claws 49. It is locked so as not to be relatively movable in the direction. That is, in this embodiment, each engaging claw 49 constitutes a locking means.

  Further, in the present embodiment, as shown in FIG. 1, the end plate 12 is provided with long holes 50 through which the bolts 44 are not inserted in addition to the long holes 47 extending along the circumferential direction. As shown in FIG. 4A and FIG. 6, the flange portion 42 of the elastic plate 34 is provided with a position adjusting portion 52 in which a through hole 51 as a position adjusting means is formed at a position corresponding to the elongated hole 50. ing. Then, by operating the position adjusting unit 52 through the long hole 50, the circumferential position of the sensor stator 22 can be adjusted from the outside of the motor case 10.

  That is, in the present embodiment, the sensor stator 22 can slide along the circumferential direction in the housing recess 32 in a temporarily assembled state where the fastening force of each bolt 44 that fastens the elastic plate 34 to the end plate 12 is weak. In addition, the elastic plate 34 can also slide along the circumferential direction by changing the position of each bolt 44 in each long hole 47. Since the sensor stator 22 and the elastic plate 34 are locked so as not to move relative to each other in the circumferential direction by the engagement of the respective engaging grooves 48 and the engaging claws 49, the sensor stator 22 includes the elastic plate. 34 is slidable along the circumferential direction.

  Therefore, for example, by inserting a rod-like or needle-like operation pin that can be inserted from the long hole 50 into the through-hole 51 of the position adjusting unit 52 and operating the position adjusting unit 52, the elastic pressure is applied from the outside of the motor case 10. The position of the plate 34 in the circumferential direction can be changed, and thereby the position in the circumferential direction of the sensor stator 22 locked to the elastic pressure plate 34 can be adjusted.

As described above, according to the present embodiment, the following features can be obtained.
(1) The end plate 12 is formed with elongated holes 47 and 50 extending in the circumferential direction, while the elastic plate 34 is engaged with each engaging groove 48 formed in the sensor stator 22 to thereby apply the elastic pressure. A plurality of engaging claws 49 for locking the plate 34 and the sensor stator 22 so as not to move relative to each other in the circumferential direction are provided, and a through hole 51 is provided at a position corresponding to the long hole 50. Then, the elastic plate 34 is fastened to the end plate 12 with the bolts 44 inserted into the long holes 47 from the outside of the end plate 12, and the sensor stator 22 loosely fitted in the housing recess 32 of the end plate 12 is attached. By being sandwiched between the end plate 12 and the compression plate 34, the end plate 12 is pressed and fixed to the end plate 12.

  With such a configuration, in a state where the fastening force of each bolt 44 is weak, that is, in a temporarily assembled state, the sensor stator 22 can slide in the housing recess 32 along the circumferential direction, and the elastic plate 34. Moreover, it becomes possible to slide along the circumferential direction by changing the position of each bolt 44 in each long hole 47. The sensor stator 22 and the elastic plate 34 are locked so as not to move relative to each other in the circumferential direction due to the engagement of the engagement grooves 48 and the engaging claws 49. And can slide along the circumferential direction. Therefore, for example, by inserting a rod-like or needle-like operation pin that can be inserted from the long hole 50 into the through hole 51 of the position adjusting unit 52 and operating the same position adjusting unit 52, the motor case 10 can be operated from the outside. The circumferential position of the elastic plate 34 can be changed, and thereby the circumferential position of the sensor stator 22 locked to the elastic plate 34 can be adjusted.

  Therefore, after the brushless motor 1 is assembled, the circumferential position of the sensor stator 22 can be adjusted from the outside of the motor case 10, whereby the components constituting the brushless motor 1 and the optimum position including the assembly error can be adjusted. The sensor stator 22 can be set. Further, the elastic plate 34 is fastened by the bolts 44 inserted into the long holes 47 from the outside of the end plate 12 and the circumferential position thereof is adjusted through the long holes 50. Since it is not necessary to take measures against water exposure, the manufacturing cost can be reduced. In addition, retightening of each bolt 44 is easy. Further, unlike the conventional example, a direct load is not applied to the sensor stator 22, so that the function of the resolver as the rotation angle sensor is not deteriorated.

  (2) The engagement plate 48 and the sensor stator 22 are relatively moved in the circumferential direction by engaging the engagement grooves 48 formed in the sensor stator 22 and the engagement claws 49 formed in the compression plate 34. Lock in impossible. With such a configuration, the elastic plate 34 and the sensor stator 22 can be reliably locked in the circumferential direction so as not to move relative to each other without causing a decrease in the function of the resolver.

  (3) A through hole 51 is formed in the elastic plate 34 at a position corresponding to the long hole 50. Thereby, the circumferential direction position of the sensor stator 22 can be adjusted from the outside of the motor case 10 with a simple configuration.

  (4) The bearing 14 on the end plate 12 side is provided on the outer side in the axial direction than the housing recess 32. With such a configuration, the vibration of the rotating shaft 5 due to the output load is difficult to be transmitted to the sensor rotor 21, so that the resolver function can be prevented from being lowered during the output load, and the rotation angle can be detected stably.

  (5) The connector 16 as a power feeding unit is provided on the end plate 12. With such a configuration, the power supply wiring to the motor coil 2 and the input / output wiring to the sensor coil 25 of the resolver 7 can be integrated to shorten the brushless motor 1.

In addition, you may change each said embodiment as follows.
In the present embodiment, the compression plate 34 is fastened to the end plate 12 with the two bolts 44. However, the present invention is not limited to this, and there is at least one bolt 44 for fastening the compression plate 34 and the end plate 12. Good. Further, the long holes 47 and 50 do not need to be distinguished from each other, and if there is one corresponding to the through hole 51 of the compression plate 34, the long holes 47 and 50 are longer than the number of bolts 44 for fastening the compression plate 34 and the end plate 12. A hole may be formed.

  In the present embodiment, the engagement groove 48 as the engagement recess is formed in the sensor stator 22 and the engagement claw 49 as the engagement protrusion is formed in the elastic plate 34, but the engagement claw 49 is formed in the sensor stator 22. The engaging groove may be formed in the elastic plate 34. Further, the shapes of the engaging recess and the engaging protrusion are not limited to the groove shape and the claw shape.

  In the present embodiment, the through hole 51 is provided in the position adjusting portion 52 of the pressure plate 34, but the present invention is not limited thereto, and a concave portion that can be operated through the long hole 50 may be formed. Moreover, you may provide the rod-shaped operation pin which protrudes toward an axial direction outer side through the long hole 50, or a protrusion.

  In the present embodiment, the long hole 47 through which the bolt 44 is inserted is provided in the end plate 12, and the screw hole 45 into which the bolt 44 is screwed is provided in the elastic plate 34. However, the present invention is not limited to this, and as shown in FIGS. 7 to 9, a long hole 63 through which the bolt 62 is inserted is provided in the elastic plate 61, and a screw hole 65 into which the bolt 62 is screwed is provided in the end plate 64. Also good. With such a configuration, a large number of screw grooves of the screw hole 65 can be formed, so that the fastening state is stabilized and the screw position is fixed, so that the fastening operation is facilitated.

  Furthermore, as shown in FIG. 9, a hexagonal hole 66 may be formed as a concavity for fastening that can be tightened or tightened, that is, can be fastened, through the screw hole 65 at the tip 62 a of the bolt 62. With such a configuration, retightening can be performed from the outside of the motor case 10 as in the above embodiment. The shape of the fastening recess is not limited to a hexagonal hole, but may be a square hole or other shapes. Moreover, you may form such a fastening recessed part also in the front-end | tip of the volt | bolt 44 of the said embodiment.

  In the present embodiment, the present invention is embodied in a surface magnet type synchronous motor (SPM), but any other brushless motor having a built-in resolver as a rotation angle sensor such as a permanent magnet embedded synchronous motor (IPM). , It may be embodied in anything.

The top view of the end plate with which the sensor stator was assembled | attached. Sectional drawing of the brushless motor along an AOB cross section. (A) Top view of sensor stator, (b) A-C sectional view of the sensor stator. (A) Top view of compression plate, (b) A-C sectional view of compression plate. FIG. 4 is a cross-sectional view of the sensor stator and the elastic plate taken along the line A-C in the assembled state. The AOD sectional view of an end plate in the state where a sensor stator and an elastic plate are assembled. The top view of the end plate in which the sensor stator of another example was assembled. The top view of the other oppression plate. The AOB cross-sectional view of the end plate in the assembled state of the sensor stator and the elastic plate of another example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Brushless motor, 2 ... Motor coil, 4 ... Stator, 5 ... Rotating shaft, 6 ... Rotor, 7 ... Resolver, 10 ... Motor case, 11 ... Case main body, 11a ... Opening part, 12, 64 ... End plate, 12a ... inner surface, 13, 14 ... bearing, 16 ... connector, 21 ... sensor rotor, 22 ... sensor stator, 32 ... receiving recess, 34, 61 ... compression plate, 44, 62 ... bolt, 62a ... tip, 66 ... hexagon Holes, 45, 65 ... screw holes, 47, 50 ... long holes, 48 ... engagement grooves, 49 ... engagement claws, 51 ... through holes.

Claims (7)

A resolver comprising a sensor rotor that rotates integrally with a motor rotating shaft and an annular sensor stator that is fixed to the motor case and disposed outside the sensor rotor, the sensor stator having an end that closes the opening of the motor case body A brushless motor that is loosely fitted in a housing recess formed inside the plate and is clamped between a fixing member fastened to the end plate, and pressed and fixed to the end plate,
A plurality of long holes extending in the circumferential direction are formed in the end plate, and the fixing member is fastened by at least one fastening screw inserted into each long hole from the outside of the end plate, and the fixing member A locking means for locking the fixing member and the sensor stator so as not to move relative to each other in the circumferential direction, and a position adjusting means operable through the elongated hole to change the circumferential position of the fixing member. And a brushless motor characterized by that. A resolver comprising a sensor rotor that rotates integrally with a motor rotating shaft and an annular sensor stator that is fixed to the motor case and disposed outside the sensor rotor, the sensor stator having an end that closes the opening of the motor case body A brushless motor that is loosely fitted in a housing recess formed inside the plate and is clamped between a fixing member fastened to the end plate, and pressed and fixed to the end plate,
A long hole extending in the circumferential direction is formed in the fixing member, the fixing member is fastened by a fastening screw inserted through the long hole, and a long hole extending in the circumferential direction is formed in the end plate. The fixing member is formed on the end plate so as to change the circumferential position of the fixing member, and a locking means for locking the fixing member and the sensor stator so as not to move relative to each other in the circumferential direction. Providing a position adjusting means operable through a long hole;
Brushless motor characterized by The brushless motor according to claim 1 or 2,
The brushless motor, wherein the position adjusting means is a through hole or a recess formed at a position corresponding to a long hole formed in the end plate. In the brushless motor according to any one of claims 1 to 3,
The locking means is an engagement protrusion engaged with an engagement recess formed in the sensor stator or an engagement recess engaged with an engagement protrusion formed in the sensor stator;
Brushless motor characterized by In the brushless motor according to any one of claims 1 to 4,
A brushless motor characterized in that a fastening recess is formed at a front end portion of the fastening screw through a screw hole into which the fastening screw is screwed. In the brushless motor according to any one of claims 1 to 5,
The bearing that pivotally supports the rotating shaft is provided on the outer side in the axial direction than the housing recess;
Brushless motor characterized by In the brushless motor according to any one of claims 1 to 6,
A brushless motor, wherein a power feeding unit for supplying driving power to a motor coil of a motor stator is provided on the end plate.

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