JP6525618B2 - Electric tool - Google Patents

Description

  The present invention relates to a power tool such as a driver drill using a motor having a wound stator.

  Among power tools such as a driver drill, there is known one using a motor (for example, a brushless motor) having a wound stator as a drive source. For example, as disclosed in Patent Document 1, the motor stator includes six magnetic poles (teeth) that project inside a cylindrical stator core, and for each pair of opposing teeth at a point symmetrical position, The coils for one phase constituting the three-phase winding are wound respectively.

JP, 2009-303363, A

  When forming a three-phase winding on six teeth, the coils of each phase are connected to the power supply wire at intervals of 120 °, for example, so that each power supply wire is drawn in three radial directions around the stator . Therefore, the housing for accommodating the stator increases in the radial direction in order to secure the wiring space of the power supply line, which hinders downsizing.

  Then, this invention aims at providing the electric tool which can implement | achieve size reduction of a housing by making the wiring space of a power wire small, and achieving it.

In order to achieve the above object, the invention according to claim 1 comprises a cylindrical stator core, electrical insulating members fixed respectively to the axial front and rear ends of the stator core, and the inside of the stator core. A stator having three-phase coils wound respectively on six teeth protrusively provided;
A rotor having a rotor core disposed inside the stator and a rotating shaft fixed to the rotor core;
Three terminals which are held by one electrical insulating member and connected to coils of one phase respectively and which are not positioned radially outward of the stator core but are offset from the stator core in the axial direction of the stator core When,
A power tool using a motor provided with
The three terminals are respectively disposed between two adjacent teeth in the circumferential direction of the stator core within a half-round area of the stator core,
All coils are formed by winding one wire in order and one pair of teeth located diagonally as one phase, and all coils connecting coils of each phase are formed . The crossover wire is drawn around each other at the other electrical insulation member side,
It is characterized in that a wire which is wound around teeth adjacent in the circumferential direction of the stator core to form a coil is connected to each terminal .
In order to achieve the above object, the invention according to claim 2 comprises a cylindrical stator core, an electrical insulating member fixed respectively to the front and rear ends of the stator core in the axial direction, and the inside of the stator core A stator having three-phase coils wound respectively on six teeth protrusively provided;
A rotor having a rotor core disposed inside the stator and a rotating shaft fixed to the rotor core;
Three terminals which are held by one electrical insulating member and connected to coils of one phase respectively and which are not positioned radially outward of the stator core but are offset from the stator core in the axial direction of the stator core When,
A power tool using a motor provided with
The three terminals are respectively disposed between two adjacent teeth in the circumferential direction of the stator core within a half-round area of the stator core,
All coils are formed by winding one wire in order and one pair of teeth located diagonally as one phase, and all coils connecting coils of each phase are formed . The crossover wire is routed by half the circumference of the other electrical insulation member side ,
The wire which is wound around the teeth in the circumferential direction of the stator core around each of the terminals to form a coil is drawn from the side close to the corresponding terminal in both coils adjacent in the circumferential direction with the terminal interposed therebetween. The wire is characterized in that the start and end of the wire are connected to one of the three terminals in the circumferential direction in mutually opposite directions .
The invention according to claim 3, in the structure according to claim 1 or 2, on the other electrically insulating member, a rib for guiding the connecting wire is characterized in that it is formed integrally.

  According to the present invention, the wiring space of the power supply line can be reduced, and the housing can be miniaturized.

It is a side view of a vibration driver drill. It is a rear view of a vibration driver drill. It is a longitudinal cross-sectional view of a vibration driver drill. It is an enlarged view of a main part. It is a perspective view of a stator. It is a disassembled perspective view of the stator which removed the sensor circuit board. It is a top view of a stator. It is a top view of the stator which removed the sensor circuit board. It is an A arrow line view of FIG. It is B arrow line view of FIG. It is the sectional view on the AA line of FIG. It is the BB sectional drawing of FIG. It is the C section enlarged view of FIG. It is a bottom view of a stator. It is a schematic diagram which shows the winding method of a wire, and (A) shows the connection side and (B) shows the non-connection side, respectively. It is a schematic diagram which shows the example of a change of the winding method of a wire, (A) is a connection side and (B) shows a non-connection side, respectively. It is a schematic diagram which shows the example of a change of the winding method of a wire, (A) is a connection side and (B) shows a non-connection side, respectively. It is a schematic diagram which shows the example of a change of the winding method of a wire, (A) is a connection side and (B) shows a non-connection side, respectively. It is a schematic diagram which shows the example of a change of the winding method of a wire, (A) is a connection side and (B) shows a non-connection side, respectively. It is a schematic diagram which shows the example of a change of the winding method of a wire, (A) is a connection side and (B) shows a non-connection side, respectively. It is a schematic diagram which shows the example of a change of the winding method of a wire, (A) is a connection side and (B) shows a non-connection side, respectively. It is a schematic diagram which shows the example of a change of the winding method of a wire, (A) is a connection side and (B) shows a non-connection side, respectively. It is a schematic diagram which shows the example of a change of the winding method of a wire, (A) is a connection side and (B) shows a non-connection side, respectively. It is a schematic diagram which shows the example of a change of the winding method of a wire, (A) is a connection side and (B) shows a non-connection side, respectively.

Hereinafter, embodiments of the present invention will be described based on the drawings.
FIG. 1 is a side view of a vibration driver drill showing an example of a power tool, FIG. 2 is a rear view, FIG. 3 is a longitudinal sectional view, and FIG. 4 is an enlarged sectional view of a main body portion. The vibration driver drill 1 has a handle 3 projecting downward from a body 2 extending in the front and rear direction, and the front end of the body 2 is provided with a drill chuck 4 capable of holding a bit at its tip, while the lower end of the handle 3 The battery pack 5 serving as a power source is attached. The housing 6 in this case is formed by assembling left and right half housings 6a and 6b in which the rear half portion of the main body 2 and the handle 3 are connected in series by screws 7, 7.

  In the main body 2, at the rear, there is a cylindrical stator 9 and a rotor 10 disposed inside the stator 9, and the inner rotor type brushless motor 8 including the rotation shaft 11 is accommodated in the rotor 10 It is done. A gear assembly 12 having a spindle 13 projecting forward from the housing 6 is assembled in front of the brushless motor 8 so that the rotation of the rotary shaft 11 can be decelerated and transmitted to the spindle 13. The drill chuck 4 is attached to the front end of the spindle 13. A switch 14 is accommodated below the main body 2 and at the top of the handle 3 to project the trigger 15 forward. A forward / reverse switching button 16 of the motor is provided above the switch 14, and an LED 17 for irradiating the front of the drill chuck 4 is accommodated obliquely upward in front of the switch 14.

  At the lower end of the handle 3, a mounting portion 18 to which the battery pack 5 is slide-mounted from the front is formed, and the mounting portion 18 has a terminal block 19 provided with a terminal 19a to which the battery pack 5 is electrically connected; A controller 20 including a microcomputer for controlling the brushless motor 8 and six switching elements and the like and electrically connected to the switch 14 and the stator 9 of the brushless motor 8 is accommodated. Reference numeral 21 denotes a strap engaging portion provided on the rear surface of the mounting portion 18 using a screw boss, and reference numerals 22 and 22 denote hook attachment portions for suspension. In the battery pack 5, 23 is a rechargeable battery (here, 10.8 V provided with 3 rechargeable batteries (cells), 24 is a terminal, 25 is a hook for retaining, and the button 25 on the front side releases the hook 25 Operation is possible.

The gear assembly 12 is assembled in a cylindrical first gear case 27 located in front of the brushless motor 8 and in front of the first gear case 27, and has a two-step cylindrical shape of a large diameter portion 29 and a small diameter portion 30. A two gear case 28 is formed. The first gear case 27 supports the rotary shaft 11 via the bearing 31 and causes the tip of the rotary shaft 11 to which the pinion 32 is attached to project into the gear assembly 12.
In the gear assembly 12, a planetary gear reduction mechanism 33 in which carriers 35A to 35C supporting a plurality of planetary gears 36A to 36C revolving in the internal gears 34A to 34C are axially arranged in three stages is accommodated. As a result, the pinion 32 of the rotary shaft 11 meshes with the first stage planetary gear 36A. Among them, the second stage internal gear 34B is rotatable and axially movable back and forth, and is capable of meshing with the coupling ring 37 held in the large diameter portion 29 at the forward position.

  A speed switching lever 39 slidably provided in the front and back direction of the housing 6 is connected to the internal gear 34B via a connecting member 38. When the speed switching lever 39 is slid rearward, the internal gear 34B is retracted via the connecting member 38, and is engaged with the outer periphery of the first stage carrier 35A while maintaining the engagement with the second stage planetary gear 36B. . Thus, the high speed mode in which the second stage deceleration is cancelled. Conversely, when the speed switching lever 39 is slid forward, the internal gear 34B moves forward from the carrier 35A via the connecting member 38, and while maintaining meshing with the second stage planetary gear 35B, the coupling ring 37 It is engaged with and the rotation is restricted. Therefore, it becomes a low speed mode in which the second stage deceleration functions.

  Here, a vibration mechanism is provided inside the small diameter portion 30 of the second gear case 28 to apply vibration to the spindle 13 in the axial direction, and the spindle 13 is provided outside the small diameter portion 30 with a predetermined load on the spindle 13. There is provided a clutch mechanism that shuts off torque transmission to the motor, and the vibration drill mode in which the spindle 13 vibrates while rotating by the switching operation described later, the drill mode in which the spindle 13 only rotates, and the torque to the spindle 13 with a predetermined load. A clutch mode (driver mode) for interrupting transmission can be selected. Each mechanism will be described below.

In the vibration mechanism, the spindle 13 is axially supported by the front and rear bearings 40 and 41 in the small diameter portion 30, and the rear end is splined to the third stage carrier 35C. A ring-shaped first cam 42 and a second cam 43 are coaxially mounted from the front between bearings 40 and 41 in the spindle 13 respectively. The first cam 42 is splined to the spindle 13 with cam teeth on the rear surface. The second cam 43 has cam teeth formed on the front surface thereof and is loosely inserted in the spindle 13 so as to be non-rotatable in the small diameter portion 30.
Furthermore, a plurality of steel balls 45 are held by the ring-shaped receiving plate 44 in front of the first cam 42 and between the steel ball 45 and the first cam 42. The cam plate 46 is provided. An arm 47 extending rearward from the cam plate 46 is connected via a connecting plate 49 to a mode switching ring 48 rotatably assembled to the large diameter portion 29 at the front of the housing 6 to rotate the mode switching ring 48. The first cam 42 is slid rearward via the cam plate 46 to mesh with the second cam 43 by the rotation of the connecting plate 49 accompanying the rotation of the second cam 43.

  In the clutch mechanism, a clutch ring 50 is rotatably mounted on the small diameter portion 30 in front of the mode switching ring 48. Inside the clutch ring 50, a screw feed plate 51 screwed to a screw formed on the outer periphery of the small diameter portion 30 is provided integrally rotatably with the clutch ring 50 and movably in the axial direction. A front receiving plate 52 which can be moved back and forth in the axial direction in a state of being rotationally restricted by the small diameter portion 30 is provided at the rear of the. On the rear of the front receiving plate 52, a pressing plate 54 that abuts on the front surface of the closed portion 53 between the large diameter portion 29 and the small diameter portion 30 and a rear receiving plate 55 on the front side are provided. A plurality of coil springs 56 are disposed between the plate 52 and the rear support plate 55 at equal intervals in the circumferential direction.

  Further, a plurality of steel balls 57, 57 are held at equal intervals in the circumferential direction at the rear of the pressing plate 54 in the closed portion 53, and the steel balls 57, 57 are held against the front surface of the third stage internal gear 34C rotatably provided. It contacts with a clutch cam (not shown) protruding on the front surface of the internal gear 34C and is engageable in the circumferential direction. The biasing force of the coil springs 56, 56 is transmitted to the internal gear 34C through the steel ball 57, the pressing plate 54, and the rear receiving plate 55, whereby the rotation of the internal gear 34C is restricted. By rotationally operating the clutch ring 50 and screw-feeding the screw feed plate 51 and the front receiving plate 52 in the axial direction to change the axial length of the coil spring 56, the pressing force on the internal gear 34C can be changed.

Next, each operation mode will be described. First, at the first rotational position of the mode switching ring 48 where the cam plate 46 does not slide the first cam 42 backward, the first cam 42 is in front of the second cam 43 and meshes with the second cam 43 do not do. Therefore, the clutch mode is such that the pressing force on the internal gear 34C can be changed by the rotation operation of the clutch ring 50.
When the trigger 15 is pushed in this clutch mode to drive the brushless motor 8, the rotary shaft 11 rotates, the spindle 13 rotates via the planetary gear reduction mechanism 33, and the driver bit mounted on the drill chuck 4 is screwed. It can be tightened. When the screw tightening progresses and the load on the spindle 13 exceeds the pressing force of the coil spring 56 for fixing the internal gear 34C, the clutch cam of the internal gear 34C advances the steel ball 57 and the pressure plate 54 and the rear support plate 55 forward. And the internal gear 34C to idle and complete the screw tightening (clutch operation).

Next, at the second rotational position in which the mode switching ring 48 is rotated by a predetermined angle from the clutch mode, the restriction ring 58 provided on the mode switching ring 48 engages with the rear receiving plate 55 to move the rear receiving plate 55 forward. regulate. Therefore, regardless of the magnitude of the pressing force of the coil spring 56, the drill mode is such that the forward movement of the pressing plate 54 is always restricted.
When the spindle 13 is rotated in this drill mode, the steel ball 57 does not get over the clutch cam of the internal gear 34C regardless of the load on the spindle 13, so the fixed state of the internal gear 34C remains unchanged. 13 rotations continue. Also at this time, since the first cam 42 does not slide backward, vibration does not occur on the spindle 13.

Then, at the third rotational position in which the mode switching ring 48 is further rotated by a predetermined angle from the drill mode, the cam plate 46 slides the first cam 42 rearward. On the other hand, the engagement between the restriction ring 58 and the rear receiving plate 55 does not change. Therefore, it becomes a vibration mode in which the first cam 42 and the second cam 43 mesh with each other.
When the spindle 13 is rotated in this vibration mode, the first cam 42 integrally rotating with the spindle 13 meshes with the second cam 43 fixed in the small diameter portion 30, so that vibration occurs in the spindle 13. Since the fixed state of the pressing plate 54 by the restriction ring 58 does not change, the rotation of the spindle 13 continues regardless of the load on the spindle 13.

The stator 9 of the three-phase brushless motor 8 is held with the front and rear direction as an axis by ribs 59 and 59 formed on the inner surfaces of the half housings 6a and 6b. As shown in FIGS. 5 to 8, the stator 9 has ring-shaped front insulators 61 and rear insulators 62 as electrical insulating members on front and rear end faces of a stator core 60 formed by laminating a plurality of steel plates. The coils 64, 64 are wound around the six teeth 63, 63 ···, which are assembled and protruded inside the stator core 60, and provided on the rotor 10 on the front surface of the front insulator 61. A sensor circuit board 65 mounted with rotation detection elements 66, 66... For detecting the position of the permanent magnet 68 is screwed.
A temperature detection element is disposed on the sensor circuit board 65, and the temperature detection signal is input to the controller 20, and the controller 20 monitoring the signal stops control of the brushless motor 8 at a predetermined temperature. It is also good. As a result, it is possible to effectively suppress the temperature rise of the brushless motor 8 of the 10.8 V vibration driver drill 1 in which the temperature rise easily occurs.

The rotor 10 is disposed around the rotation shaft 11 and has a substantially cylindrical rotor core 67 formed by laminating a plurality of steel plates, and four plate-like permanent magnets fixed inside the rotor core 67 ( And sintered magnets) 68, 68. The permanent magnets 68 are inserted into through holes respectively formed on four sides of a square centered on the rotation axis 11 in the cross section of the rotor core 67 and fixed by adhesive and / or press-fitting.
The rear end of the rotating shaft 11 is pivotally supported by a bearing 69 held at the rear of the housing 6, and a centrifugal fan 70 is attached to the front portion of the bearing 69. . Are air outlets formed on the left and right side surfaces of the housing 6 at the position of the centrifugal fan 70, and air inlets 72, 72 are provided on the side surface of the housing 6 corresponding to the outside of the stator 9 Figure 1).

  Furthermore, a rear stopper 73 is provided between the rotor core 67 and the centrifugal fan 70. After this, the stopper 73 is a disk made of brass and having the same outer diameter as the rotor core 67, and is fixed to the rotating shaft 11 coaxially with the rotor core 67. On the other hand, a front stopper 74 is provided inside the sensor circuit board 65 between the rotor core 67 and the front bearing 31. The front stopper 74 is a disk made of brass and having an outer diameter smaller than that of the rotor core 67, and is coaxial with the rotor core 67 and has a gap between the rotor core 67 and the rotary shaft 11. It is fixed. However, the outer diameter of the front stopper 74 is larger than the inner circle surrounded by the four permanent magnets 68, 68, so that the front stopper 74 is positioned in front of each permanent magnet 68. .

Here, the structure of the stator 9 will be described in detail. However, in the single stator 9 shown in FIG. 5 to FIG. 14, the front insulator 61 side will be described as the upper side, and the rear insulator 62 side as the lower side.
Six axial grooves 75 are formed on the outer periphery of the stator core 60 at equal intervals in the circumferential direction, and at the end of each groove 75, the shaft from the front insulator 61 and the rear insulator 62 The fitting pieces 76, 76 ··· integrally formed in the direction are fitted (pressed in). By press-fitting the fitting piece 76, the stator core 60 and the front and rear insulators 61 and 62 can be firmly integrated by resisting the distortion of the front and rear insulators 61 and 62. On both sides of one groove 75 of the stator core 60, protrusions 77, 77 are formed along the groove 75, and by engagement with an unshown engaging groove provided on the inner surface of the housing 6, It is possible to prevent rotation and positioning back and forth. Further, on the side surfaces of the front insulator 61, on the extension of the protrusions 77, 77, locking recesses 78, 78 are provided for locking projections (not shown) provided on the inner surface of the housing 6 to prevent rotation of the stator 9. And positioning in the front and back direction is possible. However, the protrusion 77 and the engagement recess 78 may form only one or the other. Further, the present invention is not limited to the case of acting on both the rotation prevention of the stator 9 and the front and rear positioning, and only one of the rotation prevention and the front and rear positioning may be employed.

  In the front insulator 61, of the six slots 79, 79 formed between the teeth 63, 63..., Coils of one phase are provided outside the three slots 79, 79. Holding portions 82, 82,... For holding the fusing terminals 81 for fusing the wires 64 and 64 and the power supply wires 80 of each phase are provided to project upward. The holding portion 82 arranges a pair of projections 83, 83 having a U-shape in a plan view in the circumferential direction of the front insulator 61 in a direction facing each other, and moves upward from the ring-shaped upper end surface 61a of the front insulator 61. A side view L-shaped hook 84 for holding the power supply line 80 is provided on the outside of each tooth 63 between the three holding portions 82, 82,. It is done.

In addition, on the outside of one tooth 63 located between the holding portions 82, 82, and on the outside of two teeth 63, 63 located at one circumferential direction from the tooth 63 (apex position of an equilateral triangle) , And three screw bosses 85, 85... For screwing the sensor circuit board 65 are protruded at a height lower than the holding portion 82 and protruding upward than the upper end face 61a of the front insulator 61. There is. On the outside of the teeth 63, 63 located between the screw bosses 85, 85, there is provided a receiving surface 87 having the same height as the screw boss 85, and provided with bosses 88A, 88B projecting upward from the receiving surface 87. The bosses 86A and 86B are provided in a protruding manner. The bosses 88A of the stepped bosses 86A are arranged on concentric circles slightly smaller than the concentric circles of the screw bosses 85, and the bosses 88B are smaller in diameter than the bosses 88A.
In the rear insulator 62, circumferential insulating ribs 89, 89,...

  The sensor circuit board 65 radiates between the notches 91 and 91 by forming six notches 91 curved in the circumferential direction at equal intervals in the through hole 90 of the rotating shaft 11 provided at the center. The six fixed pieces 92 as fixed parts that project in the direction are formed at equal intervals in the circumferential direction, and each notch 91 exceeds the inner circumference of the stator iron core 60 and each slot 79 in plan view It is curved to the overlapping position. Further, the tip of the fixing piece 92 slightly exceeds the outer periphery of the stator core 60, and the two adjacent fixing pieces 92 (hereinafter referred to as 92A and 92B in distinction) among the other are the others. It is formed longer than the four fixed pieces 92.

  Screw fixing holes 93 corresponding to the screw bosses 85 are respectively formed in the three fixing pieces 92, 92 ··· located at the apex of an equilateral triangle including one long fixing piece 92B among the six fixing pieces 92. There is. Positioning pieces 94A corresponding to the bosses 88A of the stepped bosses 86A and positioning holes corresponding to the bosses 88B of the stepped bosses 86B are provided on the fixing pieces 92 between the fixing pieces 92 and 92 in which the screw holes 93 are formed. And 94B are formed. On the upper surface of the remaining one fixed piece 92A, a connecting portion 95 of six lead wires 96, 96... For outputting detection signals of the three rotation detection elements 66 is provided. The three rotation detection elements 66 are disposed on the lower surface of the sensor circuit board 65 at predetermined intervals around the through holes 90.

  The fusing terminal 81 is formed by folding a strip-like metal plate in two, forming L-shaped blade pieces 98, 98 on both sides of one plate portion 97A, and folding the tip of the other plate portion 97B outward. And by inserting the blade pieces 98, 98 into the two projections 83, 83 of the holding portion 82 from above with the two-folded portion down, the plate portion 97B is positioned outward and opened upward in a V shape. Is held by. As shown in FIG. 13, a curled portion 99 in which the power supply line 80 is accommodated is formed inside the half-folded portion, and a bent portion 100 in which the wire 101 of the coil 64 is held is formed on the plate portion 97B on the upper side thereof. An outwardly folded portion 100a is formed at the upper end of the plate portion 97B. In this manner, the fusing terminals 81 are arranged to be gathered on the half circumference side of the stator 9 in plan view by the holding portion 82.

  Are formed by sequentially winding one wire 101 around each tooth 63, and the coils 64, 64 for one phase are respectively connected to the fusing terminal 81. The crossover wire 102 which connects between the coils 64 and 64 for one phase located diagonally is wired not at the front insulator 61 side but at the rear insulator 62 side. The coil winding method will be described below. When it is necessary to distinguish three phases of U, V and W, the reference numerals of each component are attached with the reference numerals of U, V and W, and pairs of each phase In order to distinguish the teeth 63 and the coil 64, numerals such as 63U1, 63U2, 64U1, 64U2 and the like are further added to the description.

FIG. 15 is a schematic view showing a winding method, in which (A) is a wire connection side (front insulator 61 side) and (B) is a non-wire connection side (rear insulator 62 side). 81U, 81V, and 81W are fusing terminals, and a symbol with a + character in the circle is a wire wound to the back side orthogonal to the paper surface, and a symbol with a black circle in the circle is a front side orthogonal to the paper surface The wires to be wound are shown respectively. Moreover, in the connection side and the non-connection side, the counterclockwise direction is described as left, and the clockwise direction is described as right.
First, on the connection side, the start end 101a is temporarily fixed to the fusing terminal 81U to which the U-phase power supply wire 80U is temporarily fixed, and wound from the right side to the teeth 63U1 located on the left side to form a coil 64U1. The wire 63U1 is drawn to the left of the teeth 63U1, and the connecting wire 102U indicated by a solid line arrow is wound around the outer circumference of the insulating rib 89 clockwise about half a turn, and then wound around the diagonal teeth 63U2 to form a coil 64U2. Then, the wire 101 is pulled out from the left side of the tooth 63U2 on the wire connection side, and is temporarily fixed to the fusing terminal 81W to which the W-phase power supply wire 80W is temporarily fixed.

  Next, coil 64W1 is formed by winding right from teeth 63W1 adjacent to the left side of fusing terminal 81W to form coil 64W1, and then pulled out to the left of tooth 63W1 on the non-connection side and crossover 102W indicated by dotted lines outside insulation rib 89. Is wound clockwise for approximately half a turn, and then wound around the diagonal teeth 63W2 from the right to form a coil 64W2. After that, pull out to the left side of teeth 63W2 on the same non-connection side and pull out crossover wire 102W clockwise for approximately half a turn around the outside of insulation rib 89 and then pull out to the left side of diagonal teeth 63W1 on the connection side, V phase The power supply line 80V is temporarily fixed to the fusing terminal 81V which is temporarily fixed. That is, the wires 101 forming the W-phase coils 64W1 and 64W2 are wired between the teeth 63W1 and 63W2 clockwise on the rear insulator 62 side by approximately a half turn.

Next, coil 64V1 is formed by winding right from teeth 63V1 adjacent to the left side of fusing terminal 81V to form coil 64V1, and then pulled out to the left of tooth 63V1 on the non-connection side, and a crossover shown by alternate long and short dash lines outside insulation rib 89. After 102 V is wound clockwise for approximately half a turn, it is wound from the right side on diagonal teeth 63 V 2 to form a coil 64 V 2. After that, pull out to the left of the teeth 63V2 on the same non-connection side and pull around the crossover wire 102V clockwise for approximately half a turn around the outside of the insulation rib 89 and then pull out to the left of the diagonal teeth 63V1 on the connection side, The end 101b is temporarily fixed to the adjacent fusing terminal 81U. That is, the wires 101 forming the V-phase coils 64V1 and 64V2 are also wired on the rear insulator 62 side between the teeth 63V1 and 63V2 in a counterclockwise direction for approximately half a turn.
Finally, the power supply wire 80 and the wire 101 are fused at each fusing terminal 81 to obtain the stator 9 in which the coils 64 and 64 of each phase are delta-connected.

After completion of wiring, align the sensor circuit board 65 with the fixing piece 92 in which the screw hole 93 is formed with the screw boss 85, and position the positioning hole 94A in the boss 88A of the stepped boss 86A and step the positioning hole 94B. When the fixing pieces 92 are fixed to the screw bosses 85 by the screws 103 respectively inserted into the bosses 88B of the bosses 86B, the sensor circuit board 65 is a front insulator by the upper surfaces of the screw bosses 85 and the receiving surfaces 87 of the stepped bosses 86A and 86B. It is supported at a position above the upper end surface 61 a of the stator 61 in a direction perpendicular to the axis of the stator 9. At this time, the tip of the hook 84 also abuts on the lower surface of the long fixed pieces 92A, 92B to support the fixed pieces 92A, 92B. Here, since the connecting wire 102 between the coils 64 and 64 of each phase is wired on the non-connection side, a sufficient gap is formed between the front insulator 61 and the sensor circuit board 65. Further, in the fixed state of the sensor circuit board 65, each holding portion 82 and the fusing terminal 81 penetrate through the notch 91 of the sensor circuit board 65 and project upward beyond the sensor circuit board 65, and each tooth 63, The slots 79 between 63 are exposed in the cutouts 91 of the sensor circuit board 65 (FIG. 7).
Here, since the power supply line 80 is held by the hook 84 and the fixing piece 92, the power supply line 80 becomes difficult to move, and also serves as a guide for wiring. Further, since the fixed piece 92A to which the lead wire 96 of the rotation detection element 66 is connected is supported by the hook 84, the lead wire 96 is unlikely to be broken. Further, since the distance in the radial direction from the axis of the brushless motor 8 to the center of the boss 88A is smaller than the distance in the radial direction from the axis to the center of the screw 103, the vibration of the sensor circuit board 65 is reduced.

  The stator 9 is incorporated in the housing 6 in a phase in which the fusing terminals 81, 81. Thereby, the power supply line 80 of each phase connected to the fusing terminal 81 is wired to the controller 20 side with the shortest distance without passing through the left and right outer sides of the stator 9. Therefore, the housing 6 does not become large in the radial direction, and compactness can be maintained, and the wiring length can be short.

  In the vibration driver drill 1 configured as described above, the microcomputer of the controller 20 is outputted from the rotation detection element 66 of the sensor circuit board 65 when the switch 15 is turned on by pushing the trigger 15. The rotation detection signal indicating the position of the permanent magnet 68 is obtained, the rotation state of the rotor 10 is acquired, and ON / OFF of each switching element is controlled according to the acquired rotation state. , 64 by rotating the rotor 10 in sequence. Therefore, since the rotating shaft 11 is rotated to rotate the spindle 13 via the planetary gear reduction mechanism 33, use in the operation mode selected by the tip tool gripped by the drill chuck 4 becomes possible.

When the centrifugal fan 70 rotates with the rotation of the rotating shaft 11, the outside air is drawn from the air inlet 72 on the side surface of the housing 6 and passes through the outside and the inside of the stator 9 (between the rotor 10) and the air outlet 71. The brushless motor 8 is cooled by being discharged from the At this time, in the stator 9, the slots 79 are exposed in a front view by the cutaway portions 91 of the sensor circuit board 65, and the crossover wires 102 are not wired between the sensor circuit board 65 and the front insulator 61, Air passing inside the stator 9 can pass smoothly through the slots 79 on both sides of each coil 64 without being obstructed by the sensor circuit board 65. Thus, each coil 64 is also effectively cooled. Further, since the fusing terminals 81 are located between the fixing pieces 92, 92, the fusing terminals 81 are also effectively cooled by the air passing through the cutouts 91.
On the other hand, in the rotor 10, since the front stopper 74 and the rear stopper 73 are provided at the front and rear, movement of each permanent magnet 68 in the front-rear direction is restricted, and dropping off from the rotor core 67 is effectively prevented. Ru.

  As described above, according to the vibration driver drill 1 of the above embodiment, the brushless motor 8 is formed on the outer periphery of the sensor circuit board 65 by forming the cutout portion 91 located between the teeth 63 and 63 in the axial direction of the stator 9. The cooling air easily passes through the inside of the stator 9. Thus, the coils 64 of the stator 9 can be effectively cooled.

In particular, since the notch 91 is formed between the fixing pieces 92 and 92 in this case, the notch 91 can be provided without any problem in the attachment of the sensor circuit board 65.
In addition, since the connection portion 95 of the lead wire 96 in the sensor circuit board 65 is disposed between the cutaway portions 91 and 91, the connection of the lead wire 96 is not disturbed even if the cutaway portion 91 is formed.
Furthermore, since the fusing terminal 81 connected to the coil 64 is disposed in the cutout portion 91, the cooling effect of each fusing terminal 81 can also be expected.
In addition, six coils 64 are formed, and six notches 91 are formed, and each notch 91 exposes each coil 64 in the axial direction of the stator 9, so each three-phase coil 64 Can be reliably cooled.

And according to vibration driver drill 1 of the above-mentioned form, sensor circuit board 65 is connected to coil 64 to front insulator 61 which is the 1st electric insulation member fixed to the perimeter side, and is connected to power wire 80 By providing the fusing terminal 81, the sensor circuit board 65 can be easily removed from the stator 9.
In particular, here, the sensor circuit board 65 is screwed to the front insulator 61, so that the sensor circuit board 65 can be easily attached and detached.
Moreover, since three fusing terminals 81 are provided and the coils 64 are delta-connected, it is possible to easily connect the three-phase coils 64.
Furthermore, since the fusing terminal 81 is disposed between the teeth 63, 63, the wire 101 of the coil 64 wound around the teeth 63 can be easily connected.
In addition, since the connection portion 95 of the lead wire 96 is disposed between the two fusing terminals 81 and 81, the lead wire 96 can be routed without interfering with the fusing terminal 81.

  On the other hand, according to the vibration driver drill 1 of the above embodiment, the groove 75 along the axial direction of the stator 9 is provided on the outer periphery of the stator core 60, and the front and rear insulators 61 and 62 are engaged with the groove 75 By integrally forming the pieces 76, the stator core 60 and the front and rear insulators 61 and 62 can be firmly integrated by resisting the distortion of the front and rear insulators 61 and 62.

And, according to the vibration driver drill 1 of the above-mentioned form, since the three fusing terminals 81 are arranged in the area of a half circumference of the stator core 60, the wiring space of the power supply wire 80 becomes smaller and The 80 routing will be easier and shorter. Therefore, miniaturization of the housing 6 can be realized.
In addition, since a part of the crossover wire 102 of the wire 101 forming the coil 64 of each phase is provided on the non-connection side (rear insulator 62 side), the space on the connection side (front insulator 61 side) is wide. As a result, the degree of freedom in managing the wiring and the like is enhanced, and it is not necessary to provide an insulating portion with the fusing terminal 81 on the connection side.

The number of notches and fixing pieces is not limited to the above, and can be appropriately increased or decreased. The number of screw bosses and stepped bosses can be appropriately changed according to the number of screwings. There is no need for stepped bosses. The shape of the notch is not limited to the curved shape, and may be a square, a trapezoid, a triangle, a semicircular shape, or the like.
Further, it is not necessary to provide the notch portion and all the slots correspondingly, and it is possible to provide a smaller number of notch portions than the slots if the coil cooling effect by the passage of air can be obtained. Therefore, it is also conceivable to provide a notch so as to expose a plurality of slits and to arrange a plurality of fusing terminals in one notch.
Furthermore, in the above embodiment, the sensor circuit board is provided on the front insulator, but it is also possible to provide the sensor circuit board on the rear insulator and wire the crossover on the front insulator side.

And the winding method of a wire can be suitably changed not only in the method of FIG. Hereinafter, each modification is demonstrated with a schematic diagram. In each of the schematic diagrams, (A) is on the wire connection side (front insulator 61 side) and (B) is on the non-wire connection side (rear insulator 62 side), and the same components as in FIG. Duplicate descriptions are omitted.
In the modification shown in FIG. 16, first, on the wire connection side, the start end 101a is temporarily fixed to the fusing terminal 81U to which the U-phase power supply wire 80U is temporarily fixed, and wound from the right to the teeth 63U1 located on the left side thereof. Then, pull out to the left side of teeth 63U1 on the non-connection side, and wire the crossover wire 102U counterclockwise approximately half a turn around the outside of the insulation rib 89, and then wound around the diagonal teeth 63U2 from the right side. Form. Then, the wire 101 is drawn from the left side of the tooth 63U2 on the wire connection side, and temporarily fixed to the fusing terminal 81W to which the W-phase power supply wire 80W is temporarily fixed.

  Next, coil 64W1 is formed by winding right from teeth 63W1 adjacent to the left side of fusing terminal 81W to form coil 64W1, and then pulled out to the left of tooth 63W1 on the non-connection side, and crossover wire 102W counterclockwise around insulation rib 89 Then, the coil 64W2 is formed by winding it from the right side on the diagonal teeth 63W2. After that, pull out to the left of the teeth 63W2 on the same non-connection side, and route the crossover wire 102W counterclockwise around the half circumference around the insulation rib 89, then pull out to the left of the diagonal teeth 63W1 on the connection side. The phase power supply line 80V is temporarily fixed to the fusing terminal 81V which is temporarily fixed. That is, the wires 101 forming the W phase coils 64W1 and 64W2 are wired between the teeth 63W1 and 63W2 on the rear insulator 62 side in a counterclockwise direction, but the crossover wires 102W and 102W are each teeth It will cross on 63W1 and 63W2.

  Then, coil 64V1 is formed by winding right from teeth 63V1 adjacent to the left side of fusing terminal 81V to form coil 64V1 and then lead out to the left of tooth 63V1 on the non-connection side, and crossover wire 102V counterclockwise around insulation rib 89 Then, the coil 64V2 is formed by winding the diagonal teeth 63V2 from the right side. After that, pull out to the left side of teeth 63V2 on the same non-connection side, draw crossover wire 102V counterclockwise around the outer circumference of insulation rib 89 approximately half a turn, and then pull out to the left side of diagonal teeth 63V1 on the connection side, left side The terminal end 101b is temporarily fixed to the fusing terminal 81U adjacent to. That is, the wire 101 forming the V-phase coils 64V1 and 64V2 is also wired between the teeth 63V1 and 63V2 on the rear insulator 62 side in a counterclockwise direction between the teeth 63V1 and 63V2, but the crossover wires 102V and 102V are each teeth The crossovers 102 overlap at a maximum of four because they cross on 63V1 and 63V2.

  In the modification shown in FIG. 17, first, on the wire connection side, the start end 101a is temporarily fixed to the fusing terminal 81U to which the U-phase power supply wire 80U is temporarily fixed, and wound from the right to the teeth 63U1 located on the left side. Then, pull out to the left side of teeth 63U1 on the non-connection side, wire the crossover wire 102U clockwise for approximately half a turn around the outside of the insulating rib 89, and then wind around the diagonal teeth 63U2 from the right Form. Then, the wire 101 is drawn from the left side of the tooth 63U2 on the wire connection side, and temporarily fixed to the fusing terminal 81W to which the W-phase power supply wire 80W is temporarily fixed.

  Next, coil 64W1 is formed by winding right from teeth 63W1 adjacent to the left side of fusing terminal 81W to form coil 64W1, and then pulled out to the left of tooth 63W1 on the non-connection side, and crossover wire 102W clockwise around the outside of insulation rib 89 Then, the coil 64W2 is formed by winding it from the right side on the diagonal teeth 63W2. After that, pull out to the left side of teeth 63W2 on the same non-connection side, draw crossover wire 102W clockwise about half a turn around the outside of insulation rib 89, and then pull out to the left side of diagonal teeth 63W1 on the connection side, V The phase power supply line 80V is temporarily fixed to the fusing terminal 81V which is temporarily fixed. That is, the wires 101 forming the W-phase coils 64W1 and 64W2 are wired between the teeth 63W1 and 63W2 clockwise on the rear insulator 62 side by approximately a half turn.

  Then, coil 64V1 is formed by winding right from teeth 63V1 adjacent to the left side of fusing terminal 81V to form coil 64V1 and then lead out to the left of tooth 63V1 on the non-connection side, and crossover wire 102V counterclockwise around insulation rib 89 Then, the coil 64V2 is formed by winding the diagonal teeth 63V2 from the right side. Thereafter, it is pulled out to the left side of the tooth 63V2 on the wire connection side, and the crossover wire 102V is wound around for approximately a half turn counterclockwise, and then the end 101b is temporarily fixed to the fusing terminal 81U. That is, the wires 101 forming the V-phase coils 64V1 and 64V2 are divided into the rear insulator 62 side and the front insulator 61 side, and are wired between the teeth 63V1 and 63V2 in a counterclockwise direction for approximately a half turn. Therefore, although one connecting wire 102 is generated on the connection side, the overlapping of the connecting wires 102 on the non-connection side is at most three, which is one less than in the case of FIG.

  In the modification shown in FIG. 18, first, on the wire connection side, the starting end 101a is temporarily fixed to the fusing terminal 81U to which the U-phase power supply wire 80U is temporarily fixed, and wound from the right to the teeth 63U1 located on the left side. Then, pull out to the left side of teeth 63U1 on the non-connection side, wire the crossover wire 102U clockwise for approximately half a turn around the outside of the insulating rib 89, and then wind around the diagonal teeth 63U2 from the right Form. Then, the wire 101 is drawn from the left side of the tooth 63U2 on the wire connection side, and temporarily fixed to the fusing terminal 81W to which the W-phase power supply wire 80W is temporarily fixed.

  Next, coil 64W1 is formed by winding right from teeth 63W1 adjacent to the left side of fusing terminal 81W to form coil 64W1, and then pulled out to the left of tooth 63W1 on the non-connection side, and crossover wire 102W counterclockwise around insulation rib 89 Then, the coil 64W2 is formed by winding it from the right side on the diagonal teeth 63W2. After that, pull out to the left of the teeth 63W2 on the same non-connection side, and route the crossover wire 102W counterclockwise around the half circumference around the insulation rib 89, then pull out to the left of the diagonal teeth 63W1 on the connection side. The phase power supply line 80V is temporarily fixed to the fusing terminal 81V which is temporarily fixed. That is, the wires 101 forming the W phase coils 64W1 and 64W2 are wired between the teeth 63W1 and 63W2 on the rear insulator 62 side in a counterclockwise direction, but the crossover wires 102W and 102W are each teeth It will cross on 63W1 and 63W2.

  Then, coil 64V1 is formed by winding right from teeth 63V1 adjacent to the left side of fusing terminal 81V to form coil 64V1 and then lead out to the left of tooth 63V1 on the non-connection side, and crossover wire 102V counterclockwise around insulation rib 89 Then, the coil 64V2 is formed by winding the diagonal teeth 63V2 from the right side. Thereafter, it is pulled out to the left side of the tooth 63V2 on the wire connection side, and the crossover wire 102V is wound around for approximately a half turn counterclockwise, and then the end 101b is temporarily fixed to the fusing terminal 81U. That is, the wires 101 forming the V-phase coils 64V1 and 64V2 are divided into the rear insulator 62 side and the front insulator 61 side, and are wired between the teeth 63V1 and 63V2 in a counterclockwise direction for approximately a half turn. Therefore, although one connecting wire 102 is generated on the connection side, the overlapping of the connecting wires 102 on the non-connection side is at most three, which is one less than in the case of FIG.

In the modification shown below, the arrangement of the phases of the fusing terminal 81 and the winding direction of the coil 64 are reverse to those in the example of FIGS.
In the modification shown in FIG. 19, first, on the wire connection side, the starting end 101a is temporarily fixed to the fusing terminal 81U at the right end where the U-phase power supply wire 80U is temporarily fixed, and wound from the left on the teeth 63U1 located on the right side. After forming the coil 64U1, pull it out to the right of the teeth 63U1 on the non-connection side, wrap the crossover wire 102U around the circumference by approximately half a turn around the outer side of the insulating rib 89, and then wind it from the left on the diagonal teeth 63U2. Form 64U2. Then, the wire 101 is drawn from the right side of the tooth 63U2 on the wire connection side, and temporarily fixed to the fusing terminal 81W to which the W-phase power supply wire 80W is temporarily fixed.

  Next, coil 64W1 is formed by winding from the left side to teeth 63W1 adjacent to the right side of fusing terminal 81W, and then drawn out to the right of tooth 63W1 on the non-connection side, and crossover wire 102W counterclockwise around insulation rib 89 Then, the coil 64W2 is formed by winding it around the diagonal teeth 63W2 from the left side. After that, pull it out to the right of the teeth 63W2 on the same non-connection side, draw the crossover wire 102W counterclockwise around the semicircle around the insulation rib 89, and then pull it out to the right of the diagonal teeth 63W1 on the wire connection side. The phase power supply line 80V is temporarily fixed to the fusing terminal 81V which is temporarily fixed. That is, the wires 101 forming the W-phase coils 64W1 and 64W2 are wired on the rear insulator 62 side between the teeth 63W1 and 63W2 in a counterclockwise direction for approximately a half turn.

  Next, coil 64V1 is formed by winding from the left side to teeth 63V1 adjacent to the right side of fusing terminal 81V, and then drawn out to the right of tooth 63V1 on the non-connection side, and crossover wire 102V counterclockwise around insulation rib 89 Then, the coil 64V2 is formed by winding it from the left side on diagonal teeth 63V2. Then, on the same non-connection side, pull out on the right side of the tooth 63V2, and after winding the crossover wire 102V approximately half a turn counterclockwise on the outside of the insulating rib 89, pull out on the right side of the tooth 63V1 on the wire connection side. Temporarily fix the terminal end 101b. That is, the wires 101 forming the V-phase coils 64V1 and 64V2 are also wired on the rear insulator 62 side between the teeth 63V1 and 63V2 in a counterclockwise direction for approximately half a turn.

  In the modification shown in FIG. 20, first, on the wire connection side, the start end 101a is temporarily fixed to the fusing terminal 81U to which the U-phase power supply wire 80U is temporarily fixed, and wound from the left to the teeth 63U1 located on the right side. Then, pull out to the right of teeth 63U1 on the non-connection side, wire the crossover wire 102U clockwise for approximately half a turn around the outside of the insulation rib 89, and then wind around the diagonal teeth 63U2 from the left to form the coil 64U2. Form. Then, the wire 101 is drawn from the right side of the tooth 63U2 on the wire connection side, and temporarily fixed to the fusing terminal 81W to which the W-phase power supply wire 80W is temporarily fixed.

  Next, coil 64W1 is formed by winding from the left side to teeth 63W1 adjacent to the right side of fusing terminal 81W, and then drawn out to the right of tooth 63W1 at the non-connection side, and crossover wire 102W clockwise at the outside of insulation rib 89 Then, the coil 64W2 is formed by winding it around the diagonal teeth 63W2 from the left side. After that, pull out to the right of the teeth 63W2 on the same non-connection side, draw the crossover wire 102W clockwise for approximately half a turn around the outside of the insulation rib 89, and then pull out to the right of the diagonal teeth 63W1 on the connection side, V The phase power supply line 80V is temporarily fixed to the fusing terminal 81V which is temporarily fixed. That is, the wires 101 forming the W phase coils 64W1 and 64W2 are wired between the teeth 63W1 and 63W2 clockwise on the rear insulator 62 side by approximately a half turn, but the crossover wires 102W and 102W are each teeth It will cross on 63W1 and 63W2.

  Next, coil 64V1 is formed by winding from the left side to teeth 63V1 adjacent to the right side of fusing terminal 81V, and then drawn out to the right of tooth 63V1 on the non-connection side, and crossover wire 102V clockwise on the outside of insulation rib 89 Then, the coil 64V2 is formed by winding it from the left side on diagonal teeth 63V2. After that, pull out on the right side of teeth 63V2 on the same non-connection side, draw crossover wire 102V clockwise on the outside of insulation rib 89 for approximately half a turn, and then pull out on the right side of diagonal teeth 63V1 on the connection side, right side The terminal end 101b is temporarily fixed to the fusing terminal 81U adjacent to. That is, the wire 101 forming the V phase coils 64V1 and 64V2 is also wired on the rear insulator 62 side between the teeth 63V1 and 63V2 clockwise for approximately a half turn, but the crossover wires 102V and 102V are each teeth The crossovers 102 overlap at a maximum of four because they cross on 63V1 and 63V2.

  In the modified example shown in FIG. 21, first, on the wire connection side, the start end 101a is temporarily fixed to the fusing terminal 81U to which the U-phase power supply wire 80U is temporarily fixed, and wound from the left to the teeth 63U1 positioned on the right side. Then, pull out to the right side of teeth 63U1 on the non-connection side, and wire the crossover wire 102U counterclockwise approximately half a turn around the outside of the insulation rib 89, and then wound around the diagonal teeth 63U2 from the left side. Form. Then, the wire 101 is drawn from the right side of the tooth 63U2 on the wire connection side, and temporarily fixed to the fusing terminal 81W to which the W-phase power supply wire 80W is temporarily fixed.

  Next, coil 64W1 is formed by winding from the left side to teeth 63W1 adjacent to the right side of fusing terminal 81W, and then drawn out to the right of tooth 63W1 on the non-connection side, and crossover wire 102W counterclockwise around insulation rib 89 Then, the coil 64W2 is formed by winding it around the diagonal teeth 63W2 from the left side. After that, pull it out to the right of the teeth 63W2 on the same non-connection side, draw the crossover wire 102W counterclockwise around the semicircle around the insulation rib 89, and then pull it out to the right of the diagonal teeth 63W1 on the wire connection side. The phase power supply line 80V is temporarily fixed to the fusing terminal 81V which is temporarily fixed. That is, the wires 101 forming the W-phase coils 64W1 and 64W2 are wired on the rear insulator 62 side between the teeth 63W1 and 63W2 in a counterclockwise direction for approximately a half turn.

  Next, coil 64V1 is formed by winding from the left side to teeth 63V1 adjacent to the right side of fusing terminal 81V, and then drawn out to the right of tooth 63V1 on the non-connection side, and crossover wire 102V clockwise on the outside of insulation rib 89 Then, the coil 64V2 is formed by winding it from the left side on diagonal teeth 63V2. Thereafter, it is drawn to the right of the tooth 63V2 on the wire connection side, and the crossover wire 102V is wound clockwise for approximately half a turn, and then the end 101b is temporarily fixed to the fusing terminal 81U. That is, the wires 101 forming the V-phase coils 64V1 and 64V2 are divided into the rear insulator 62 side and the front insulator 61 side, and are wired between the teeth 63V1 and 63V2 clockwise for approximately a half turn. Therefore, although one connecting wire 102 is generated on the connection side, the overlapping of the connecting wires 102 on the non-connection side is at most three, which is one less than in the case of FIG.

  In the modification shown in FIG. 22, first, on the wire connection side, the starting end 101a is temporarily fixed to the fusing terminal 81U to which the U-phase power supply wire 80U is temporarily fixed, and wound from the left to the teeth 63U1 located on the right side. Then, pull out to the right side of teeth 63U1 on the non-connection side, and wire the crossover wire 102U counterclockwise approximately half a turn around the outside of the insulation rib 89, and then wound around the diagonal teeth 63U2 from the left side. Form. Then, the wire 101 is drawn from the right side of the tooth 63U2 on the wire connection side, and temporarily fixed to the fusing terminal 81W to which the W-phase power supply wire 80W is temporarily fixed.

  Next, coil 64W1 is formed by winding from the left side to teeth 63W1 adjacent to the right side of fusing terminal 81W, and then drawn out to the right of tooth 63W1 at the non-connection side, and crossover wire 102W clockwise at the outside of insulation rib 89 Then, the coil 64W2 is formed by winding it around the diagonal teeth 63W2 from the left side. After that, pull out to the right of the teeth 63W2 on the same non-connection side, draw the crossover wire 102W clockwise for approximately half a turn around the outside of the insulation rib 89, and then pull out to the right of the diagonal teeth 63W1 on the connection side, V The phase power supply line 80V is temporarily fixed to the fusing terminal 81V which is temporarily fixed. That is, the wires 101 forming the W phase coils 64W1 and 64W2 are wired between the teeth 63W1 and 63W2 clockwise on the rear insulator 62 side by approximately a half turn, but the crossover wires 102W and 102W are each teeth It will cross on 63W1 and 63W2.

  Next, coil 64V1 is formed by winding from the left side to teeth 63V1 adjacent to the right side of fusing terminal 81V, and then drawn out to the right of tooth 63V1 on the non-connection side, and crossover wire 102V clockwise on the outside of insulation rib 89 Then, the coil 64V2 is formed by winding it from the left side on diagonal teeth 63V2. Thereafter, it is drawn to the right of the tooth 63V2 on the wire connection side, and the crossover wire 102V is wound clockwise for approximately half a turn, and then the end 101b is temporarily fixed to the fusing terminal 81U. That is, the wires 101 forming the V-phase coils 64V1 and 64V2 are divided into the rear insulator 62 side and the front insulator 61 side, and are wired between the teeth 63V1 and 63V2 clockwise for approximately a half turn. Therefore, although one connecting wire 102 is generated on the connection side, the overlapping of the connecting wires 102 on the non-connection side is at most three, which is one less than in the case of FIG.

  In the modification shown in FIG. 23, first, on the wire connection side, the start end 101a is temporarily fixed to the fusing terminal 81U to which the U-phase power supply wire 80U is temporarily fixed, and wound from the left to the teeth 63U1 positioned on the right side. Then, pull out to the right side of teeth 63U1 on the non-connection side, and wire the crossover wire 102U counterclockwise approximately half a turn around the outside of the insulation rib 89, and then wound around the diagonal teeth 63U2 from the left side. Form. Then, the wire 101 is pulled out from the right side of the tooth 63U on the wire connection side, and the W-phase power supply wire 80W is temporarily fixed in a folded state to the fusing terminal 81W temporarily fixed.

  Next, after winding crossover wire 102W clockwise for approximately half a turn from fusing terminal 81W and winding from the left side to tooth 63W2 adjacent to the right side of tooth 63U1, coil 64W2 is formed, then the right side of tooth 63W2 on the non-connection side After winding the crossover wire 102W clockwise for approximately half a turn on the outside of the insulating rib 89, the coil 64W1 is formed by winding it from the left side on the diagonal teeth 63W1. Thereafter, it is drawn to the right of the teeth 63W1 on the wire connection side, and is temporarily fixed to the fusing terminal 81V to which the V-phase power supply line 80V is temporarily fixed. That is, the wires 101 forming the W-phase coils 64W1 and 64W2 are divided into the front insulator 61 side and the rear insulator 62 side, and are respectively wired for approximately a half turn clockwise.

  Next, coil 64V1 is formed by winding from the left side to teeth 63V1 adjacent to the right side of fusing terminal 81V, and then drawn out to the right of tooth 63V1 on the non-connection side, and crossover wire 102V clockwise on the outside of insulation rib 89 Then, the coil 64V2 is formed by winding it from the left side on diagonal teeth 63V2. Thereafter, it is drawn to the right of the tooth 63V2 on the wire connection side, and the crossover wire 102V is wound clockwise for approximately half a turn, and then the end 101b is temporarily fixed to the fusing terminal 81U. That is, the wires 101 forming the V-phase coils 64V1 and 64V2 are also divided into the front insulator 61 side and the rear insulator 62 side, and are respectively wired clockwise for approximately half a turn.

In the modification shown in FIG. 24, the positions of the fusing terminals 81 V and 81 W are reversed from those in FIG. First, on the wire connection side, the start end 101a is temporarily fixed to the fusing terminal 81U to which the U-phase power supply wire 80U is temporarily fixed, and wound from the left side to the teeth 63U1 located on the right side to form a coil 64U1. The wire 63U1 is drawn to the right of the teeth 63U1, and the connecting wire 102U is wound around the outer circumference of the insulating rib 89 approximately half a turn clockwise, and then wound around the diagonal teeth 63U2 to form a coil 64U2. Then, the wire 101 is drawn from the right side of the tooth 63U2 on the wire connection side, and the V phase power supply line 80V is temporarily fixed in a folded state to the fusing terminal 81V which is temporarily fixed.

  Next, the crossover wire 102V is wound clockwise from the fusing terminal 81V and wound from the left side on the tooth 63V2 adjacent to the left side of the tooth 63U2 to form a coil 64V2, and then drawn out to the right side of the tooth 63V2 on the non-connection side After winding the crossover wire 102V clockwise for approximately half a turn on the outside of the insulating rib 89, the coil 64V1 is formed by winding from the left side on the diagonal teeth 63V1. Thereafter, on the wire connection side, the W-phase power supply wire 80W is temporarily fixed to the fusing terminal 81W which is temporarily fixed by drawing it clockwise from the right side of the tooth 63V1. That is, the wires 101 forming the V phase coils 64V1 and 64V2 are wired clockwise between the fusing terminal 81V and the teeth 63V2 and between the teeth 63V1 and the fusing terminal 81W on the front insulator 61 side. On the rear insulator 62 side, the wires 63V2 and 63V1 are wired in a clockwise direction so as to extend approximately half a circumference.

  Then, coil 64W1 is formed by winding from the left side to teeth 63W1 adjacent to the left side of fusing terminal 81W, and then drawn out to the right of tooth 63W1 on the non-connection side, and crossover wire 102W clockwise around the outside of insulation rib 89 Then, the coil 64W2 is formed by winding it around the diagonal teeth 63W2 from the left side. Thereafter, the wire 63W2 is pulled out to the right of the teeth 63W2 on the wire connection side, and the crossover wire 102W is wound clockwise, and then the end 101b is temporarily fixed to the fusing terminal 81U. That is, the wires 101 forming the W phase coils 64W1 and 64W2 are also wired clockwise between the fusing terminal 81W and the teeth 63W1 and between the teeth 63W2 and the fusing terminal 81U on the front insulator 61 side. On the rear insulator 62 side, the wires 63W1 and 63W2 are wired in a clockwise direction so as to extend approximately half a circumference.

Besides, in the invention relating to the cooling of the coil, the electric power tool is not limited to the vibration driver drill, and another model such as an impact driver or grinder if it uses a motor that fixes the sensor circuit board to the electrical insulating member as a drive source. The present invention is also applicable. Therefore, the position and orientation of the motor in the housing can be changed as appropriate. Further, although the coil is formed of one wire (winding) in the above embodiment, it is also possible to form the coil by a plurality of windings such as two or three. Of course, not only delta connection but Y connection may be used.
On the other hand, also in the invention relating to the arrangement of the terminals, the electric power tool is not limited to the vibration driver drill, but an impact driver, grinder, etc. if the motor is provided with a terminal having a coil connected to the electrical insulation member. The present invention is applicable to other types of machines. Therefore, the area for arranging the terminals may be the upper half or the horizontal half depending on the model, and even if the three-phase winding is Y-connected, the compactness can be achieved by the arrangement of the terminals.

  1 · · · Vibration driver drill, 2 · · body, 3 · · · handle · 4 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 11 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Rotor core, 70 · · centrifugal fan, 71 · · exhaust port, 72 · · inlet port, 75 · · groove, 76 · · · · Fitting pieces · 79 · · · · · · 80 · · power supply wire, 81 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 85 · · · · · · · · · 91 · · · · · · · · · · · · · · · fixed Piece, 95 · · · contact Parts, 96 ... lead wire, 101 ... wire, 101a ... start, 101b ... end, 102 ... connecting wire.

Claims (3)

Three-phase wound around a cylindrical stator core, electrical insulating members fixed respectively to the axial front and rear ends of the stator core, and six teeth protruding inside the stator core A coil having a stator;
A rotor having a rotor core disposed inside the stator and a rotation axis fixed to the rotor core;
It is held by one of the electrically insulating members, and coils of one phase are respectively connected, and are not positioned radially outward of the stator core but are offset from the stator core in the axial direction of the stator core. Three terminals, and
A power tool using a motor provided with
The three terminals are respectively disposed between two adjacent teeth in the circumferential direction of the stator core in a region corresponding to a half circumference of the stator core,
All the coils are formed by winding one wire in order and one pair of two teeth positioned diagonally as one phase and winding the one phase each, and between the coils of each phase All the crossovers that connect are routed by half the circumference of the other electrical insulation member side,
The electric tool according to claim 1, wherein the wire which is wound around the teeth adjacent in the circumferential direction of the stator core to form the coil is connected to each of the terminals . Three-phase wound around a cylindrical stator core, electrical insulating members fixed respectively to the axial front and rear ends of the stator core, and six teeth protruding inside the stator core A coil having a stator;
A rotor having a rotor core disposed inside the stator and a rotation axis fixed to the rotor core;
It is held by one of the electrically insulating members, and coils of one phase are respectively connected, and are not positioned radially outward of the stator core but are offset from the stator core in the axial direction of the stator core. Three terminals, and
A power tool using a motor provided with
The three terminals are respectively disposed between two adjacent teeth in the circumferential direction of the stator core in a region corresponding to a half circumference of the stator core,
All the coils are formed by winding one wire in order and one pair of two teeth positioned diagonally as one phase and winding the one phase each, and between the coils of each phase All the crossovers that connect are routed by half the circumference of the other electrical insulation member side ,
The wire which is wound around the teeth adjacent to the stator iron core in the circumferential direction to form the coil around each of the terminals is close to the terminal in the coils adjacent to the circumferential direction with the terminal interposed therebetween. The wire is drawn out from the side and connected to the terminal, and the start and end of the wire are connected to one of the three terminals in the circumferential direction so as to be opposite to each other. A power tool characterized by Wherein the other of said electrically insulating member, the power tool according to claim 1 or 2 rib for guiding the connecting wire is characterized in that it is formed integrally.

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