WO2024241752A1 - モータ - Google Patents
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- WO2024241752A1 WO2024241752A1 PCT/JP2024/014927 JP2024014927W WO2024241752A1 WO 2024241752 A1 WO2024241752 A1 WO 2024241752A1 JP 2024014927 W JP2024014927 W JP 2024014927W WO 2024241752 A1 WO2024241752 A1 WO 2024241752A1
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- WIPO (PCT)
- Prior art keywords
- connection terminal
- motor
- holes
- bracket
- opening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
Definitions
- This disclosure relates to motors, and in particular to motors having wiring boards.
- a motor that houses a stator and rotor inside a motor case, and connects coils attached to teeth on the stator core to power supply wiring connected to an external power source via a printed wiring board (hereinafter simply referred to as wiring board) (see, for example, Patent Documents 1 to 3). Power supplied from the external power source is supplied to each coil from the power supply wiring via wiring provided on the wiring board.
- wiring board a printed wiring board
- terminal pins are generally used to electrically connect the wiring board and the coil.
- the terminal pins are fixed to an insulator or the like. An end of the coil is wrapped around the terminal pin.
- the wiring board and the coil are electrically connected by electrically connecting the terminal pin to the wiring board.
- the wiring board is often provided with through holes. Each terminal pin is inserted into the through hole. Each terminal pin inserted into the through hole is soldered or the like. Each terminal pin is connected to a wire provided on the wiring board by soldering or the like. Therefore, it is necessary to position each terminal pin in advance with respect to the through hole of the wiring board.
- a fixing groove is provided in the insulator, and the end of the coil is fitted into the fixing groove to position the end of the coil. Furthermore, a notch is provided in the wiring board, and after the end of the coil is inserted, the wiring provided on the wiring board and the end of the coil are connected by soldering.
- each slot of the stator typically, a coil is housed in each slot of the stator.
- Each end of the coil must be connected to a wire on the wiring board. For example, if there are 12 slots, the coil must be connected to the wire on the wiring board at 24 points.
- This disclosure has been made in light of these points.
- the purpose of this disclosure is to provide a motor that allows the connection between the ends of the coil and the wiring on the wiring board to be performed easily and reliably.
- the motor according to the present disclosure includes a cylindrical motor case with a bottom, a rotor housed in the motor case and having a rotating shaft including an axis extending in the axial direction, a stator housed in the motor case and arranged at a predetermined distance from the rotor, a bracket made of an insulating material having a recess and arranged to cover the opening of the motor case, a cover attached to the bracket to cover the recess, and a wiring board housed in the recess and attached to the bracket.
- the stator has an annular yoke centered on the axis, a plurality of teeth arranged at a predetermined interval on the inner circumference of the yoke, and a coil attached to each of the plurality of teeth.
- the coil has a first connection terminal at one end and a second connection terminal at the other end, and the first connection terminal and the second connection terminal each protrude linearly toward one side of the axial direction.
- the wiring board has a plurality of first through holes.
- the bracket has a plurality of second through holes for aligning the first connection terminal and the second connection terminal. When the longitudinal direction of the rotating shaft is the axial direction, the first through holes and the second through holes are provided at positions overlapping the first connection terminal and the second connection terminal when viewed from the axial direction.
- the first connection terminal and the second connection terminal are inserted into the first through holes, respectively, and the second connection terminal is inserted into the second through holes, respectively, and is connected to wiring provided on the wiring board.
- connection between the ends of the coil and the wiring on the wiring board can be performed easily and reliably.
- FIG. 1 is an exploded perspective view of a motor according to an embodiment.
- FIG. 2 is a cross-sectional view of the motor according to the embodiment.
- FIG. 3A is a perspective view of the bracket as viewed from above.
- FIG. 3B is a perspective view of the bracket as seen from below.
- FIG. 3C is a view of the second through hole as viewed from below.
- FIG. 3D is a cross-sectional view taken along line IIID-IIID in FIG. 3C.
- FIG. 3E is a cross-sectional view taken along line IIIE-IIIE of FIG. 3C.
- FIG. 4 is a cross-sectional view of the vicinity of the second connection terminal of the coil in the motor according to the embodiment.
- FIG. 6A is a diagram showing one step of the assembly process for the motor according to the embodiment.
- FIG. 6B is a diagram showing a process subsequent to the process shown in FIG. 6A.
- FIG. 6C is a diagram showing a step subsequent to the step shown in FIG. 6B.
- FIG. 6D is a diagram showing a step subsequent to the step shown in FIG. 6C.
- FIG. 6E is a diagram showing a step subsequent to the step shown in FIG. 6D.
- FIG. 7 is an enlarged view of the first connection terminal and the second connection terminal.
- FIG. 8 is a view of a second through hole according to a modified example as viewed from below.
- Fig. 1 is an exploded perspective view of a motor 1000 according to an embodiment of the present invention.
- Fig. 2 is a cross-sectional view of the motor 1000 according to the embodiment of the present invention.
- the direction in which the rotating shaft 210 of the motor 1000 extends i.e., the longitudinal direction of the rotating shaft 210
- the direction perpendicular to this axial direction i.e., the radial direction of the motor 1000, is sometimes referred to as the "radial direction.”
- the outer periphery of the motor 1000 is sometimes referred to as the "circumferential direction.”
- the center side of the motor 1000 i.e., the side closer to the rotating shaft 210
- the outer periphery of the motor 1000 i.e., the side closer to the yoke 20, is sometimes referred to as the outer side.
- the side on which the first connection terminal 41 and the second connection terminal 42 (see FIG. 2) of the coil 40 are arranged is sometimes referred to as the upper side or top, and the opposite side is sometimes referred to as the lower side or bottom.
- the motor 1000 has a stator 100 and a rotor 200.
- the motor 1000 has components other than those shown in Figures 1 and 2. However, for the sake of convenience, illustration and description of these components will be omitted.
- the motor 1000 is a so-called inner rotor type motor. However, the motor 1000 is not limited to this, and may be an outer rotor type motor.
- the motor 1000 has a stator 100, a rotor 200, a motor case 400, a bracket 500, a wiring board 600, and a cover 700.
- the motor case 400 is a cylindrical metal member with a bottom.
- the stator 100 and rotor 200 are housed inside the motor case 400.
- the stator 100 has a stator core 30 and a coil 40.
- the stator 100 has an insulator 50 (see also FIG. 6A described later).
- the stator core 30 is composed of a circumferentially continuous annular yoke 20 and a number of teeth 10 connected at equal angular intervals to the inner circumference of the yoke 20. Both the yoke 20 and the teeth 10 are formed by stacking a number of electromagnetic steel sheets in the axial direction.
- the coil 40 is a component that includes a wire winding body formed by winding a conductor with an insulating coating (not shown) on its surface.
- the coil 40 is attached to the teeth 10 of the stator core 30 with an insulator 50 sandwiched between them.
- the coil 40 is housed in a slot 31.
- the slot 31 is located between adjacent teeth 10 (see FIG. 6A described below).
- the coil 40 is a molded body in which a wire made of a conductor with a rectangular cross section is wound in a spiral shape and laminated for n turns (n is a natural number). Both ends of the coil 40 are linear along the axial direction. The end located radially inward of both ends of the coil 40 is a first connection terminal 41, and the end located radially outward is a second connection terminal 42.
- formed body in this specification includes, for example, those formed through the following process.
- a formed body is formed by preparing multiple rectangular or L-shaped metal plate materials of different lengths, widths, or thicknesses, and pressing these plate materials, or joining them by cold welding, welding, or other methods.
- the plate materials are made of a low-resistance material such as copper or aluminum.
- the formed body may be formed by casting, in which copper or the like is melted and poured into a mold.
- the formed body may also be formed by bending, at a predetermined position, a plate-shaped wire whose width or thickness has been varied along the way.
- the formed body may also be formed by rolling, at a predetermined position, a plate-shaped wire of constant width and thickness, and then winding it spirally after changing the width and thickness along the way.
- the formed body is formed by adding another process to winding the wire, or by a method other than simple winding.
- the formed body also includes irregularly shaped coils.
- the cross-sectional shape of the coil 40 may be substantially rectangular.
- the cross-sectional shape of the coil 40 may have a shape with chamfered corners.
- the cross-sectional shape of the coil 40 is not limited to a rectangle, and may be an n-sided polygon (n is an integer of 3 or more).
- the cross-sectional shape of the coil 40 may be circular or elliptical.
- the bending stiffness of the wire that constitutes the coil 40 must be higher than a certain level. Specifically, it is sufficient that the bending stiffness of the wire is kept high enough to prevent bending or significant deformation during mounting of the bracket 500 and wiring board 600, which will be described later, and during wiring between the coils 40 (see Figures 6C and 6D).
- the insulator 50 is a cylindrical insulating member made of resin or the like.
- the insulator 50 is attached to each of the multiple teeth 10.
- the insulator 50 is interposed between the coil 40 and the stator core 30, so that the coil 40 and the stator core 30 are electrically insulated from each other.
- the insulator 50 has flanges on both radial ends.
- the insulator 50 is a bobbin insulator divided in the radial direction. However, this is not particularly limited. For example, it may be divided into two in the axial direction. In that case, insulating paper (not shown) may be interposed between the insulator 50 and the coil 40.
- the rotor 200 has a substantially cylindrical rotor core 220, a rotating shaft 210, and a plurality of magnets 230.
- the rotor core 220 has a through hole formed at its axis C.
- the rotating shaft 210 is inserted into the through hole of the rotor core 220.
- the magnets 230 are arranged facing the stator 100 with their north and south poles alternating along the outer periphery of the rotor core 220.
- the rotor core 220 like the stator core 30, is made of a plurality of electromagnetic steel plates stacked in the axial direction.
- Both the rotor core 220 and the stator core 30 need only be made of a magnetic material and are not limited to the structure shown in this embodiment.
- the motor case 400 houses bearings 310 and 320. Bearings 310 and 320 are spaced apart in the axial direction. Both bearings 310 and 320 rotatably support the rotating shaft 210. Bearing 310 is disposed axially lower than bearing 320. Bearing 310 is housed in a recess provided in the bottom surface of the motor case 400. Bearing 320 is housed inside a bearing cover 410 attached to the upper surface of the rotor core 220.
- the bracket 500 is a tray-shaped insulating member made of resin or the like.
- the bracket 500 is attached to the motor case 400 so as to cover the opening of the motor case 400 and seal the inside.
- the configuration of the bracket 500 will be described in detail later.
- the wiring board 600 is, for example, a known printed wiring board. However, the wiring board 600 has a plurality of first through holes 610 (see FIG. 4 described later). The arrangement of the first through holes 610 will be described later.
- a number of circuit components 630 are mounted on wiring (not shown) provided on the surface of the wiring board 600.
- the circuit components 630 form a drive control circuit 620 for the motor 1000.
- the cover 700 is a metal member.
- the cover 700 is attached to the bracket 500 so as to cover the board accommodating portion 510 of the bracket 500.
- a plurality of heat dissipation fins 710 are formed on the upper surface of the cover 700.
- the circuit components 630 are connected to the heat dissipation fins 710 via heat dissipation silicon (not shown) or the like. Heat generated in the circuit components 630 is transferred to the heat dissipation fins 710 via the heat dissipation silicon or the like. The heat transferred to the heat dissipation fins 710 is dissipated from the heat dissipation fins 710 to the outside of the motor 1000.
- the coils 40 are three sets of coils 40 connected in series.
- an external power source (not shown) is connected to the power supply connection port 530 provided on the bracket 500
- three-phase currents having a phase difference of 120° in electrical angle so-called U-phase, V-phase, and W-phase currents, are supplied to each of the three sets of coils 40, exciting them and generating a rotating magnetic field.
- This rotating magnetic field interacts with the magnetic field generated by the magnet 230 provided on the rotor 200, generating torque in the rotor 200.
- This causes the rotating shaft 210 supported by the bearings 310 and 320 to rotate.
- the strength of the rotating magnetic field, the rotation speed of the motor, and the rotation amount of the motor are controlled by the drive control circuit 620.
- the drive control circuit 620 is supplied with driving power from the external power source connected to the power supply connection port 530.
- Fig. 3A is a perspective view of the bracket 500 as viewed from above.
- Fig. 3B is a perspective view of the bracket 500 as viewed from below.
- Fig. 3C is a view of the second through-hole 520 as viewed from below.
- Fig. 3D is a cross-sectional view taken along line IIID-IIID in Fig. 3C.
- Fig. 3E is a cross-sectional view taken along line IIIE-IIIE in Fig. 3C.
- the bracket 500 has a substrate accommodating portion 510 formed as a recess formed over the entire bracket.
- the wiring substrate 600 is accommodated in the substrate accommodating portion 510.
- a plurality of second through holes 520 are formed in the bottom plate of the bracket 500.
- the second through holes 520 are provided at positions overlapping the first connection terminal 41 and the second connection terminal 42 of the coil 40 as viewed from the axial direction (see FIG. 1 and FIG. 4 described later). That is, as shown in FIG. 3A, the second through holes 520 are provided on the inner circumference side and the outer circumference side along the radial direction.
- the second through holes 520 are provided at the same intervals as the coils 40 are arranged in the circumferential direction on the inner circumference side and the outer circumference side, respectively. However, the second through holes 520 on the inner circumference side and the second through holes 520 on the outer circumference side are arranged at a predetermined interval in the circumferential direction. This amount of misalignment is the same as the amount of circumferential misalignment between the first connection terminal 41 and the second connection terminal 42 of the coil 40.
- the second through hole 520 shown in FIG. 3D is a cross section of the second through hole 520 on the outer periphery side.
- the second through hole 520 shown in FIG. 3E is a cross section of the second through hole 520 on the inner periphery side.
- the side of the bracket 500 is provided with the power connection port 530 described above.
- the side of the power connection port 530 is open.
- An extraction wiring 540 is arranged inside the power connection port 530.
- Driving power is supplied to a drive control circuit 620 provided on the wiring board 600 via the extraction wiring 540.
- a current is supplied from the drive control circuit 620 to each coil 40 to generate a line magnetic field.
- the underside of the bracket 500 is provided with a bearing accommodating portion 550 and multiple ribs 560.
- the bearing accommodating portion 550 is a convex portion that protrudes downward (however, upward in FIG. 3B) from the underside of the bracket 500.
- the outer shape of the bearing accommodating portion 550 is circular.
- the bearing accommodating portion 550 accommodates the bearing 320 and the bearing cover 410 that covers it.
- the bearing accommodating portion 550 and the bearing cover 410 protect the bearing 320 from vibrations during operation of the motor 1000 and from external shocks.
- the ribs 560 are convex portions that protrude downward from the underside of the bracket 500.
- the ribs 560 are arranged radially in contact with the bearing accommodating portion 550. Between adjacent ribs 560, one second through hole 520 on the inner circumference side and one second through hole 520 on the outer circumference side are arranged.
- the strength of the bracket 500 is ensured and vibrations generated in the bracket 500 during operation of the motor 1000 are suppressed.
- the second through hole 520 penetrates the bottom plate of the bracket 500 and reaches the underside of the bracket 500.
- the second through hole 520 has a radial width that changes in its depth direction, in the axial direction in this case. Specifically, the radial widths of the first opening 521 located on the axially lower side, the second opening 522 located on the axially upper side, and the terminal holding portion 523 located between the first opening 521 and the second opening 522 and communicating with each of them are different.
- the "width" when the "width" is used in relation to each portion of the second through hole 520 and the first through hole 610, it simply means the radial width.
- the first opening 521 opens at the underside of the bottom plate of the bracket 500.
- the first opening 521 opens at the upper surface of the bottom plate of the bracket 500.
- the first opening 521 and the second opening 522 each have a width that is not constant but changes along the axial direction.
- the first opening 521 has a tapered shape that narrows from the aforementioned lower surface toward the inside of the bottom plate of the bracket 500.
- the second opening 522 has a tapered shape that narrows from the aforementioned upper surface toward the inside of the bottom plate of the bracket 500.
- the first opening 521 is widest at the bottom end.
- the first opening 521 is narrowest at the part that is continuous with the terminal holding portion 523, i.e., at the top end, and is the same width as the terminal holding portion 523.
- the second opening 522 is widest at the top end.
- the second opening 522 is narrowest at the part that is continuous with the terminal holding portion 523, i.e., at the bottom end, and is the same width as the terminal holding portion 523.
- the width of the bottom end of the first opening 521 is wider than the width of the top end of the second opening 522.
- FIG. 4 is a cross-sectional view of the vicinity of the second connection terminal 42 of the coil 40 in the motor 1000 according to the embodiment.
- Fig. 5 is an enlarged view of the part surrounded by the dashed line in Fig. 4.
- the second connection terminal 42 of the coil 40 is inserted through the second through hole 520 of the bracket 500 and the first through hole 610 of the wiring board 600.
- the second connection terminal 42 of the coil 40 protrudes upward in the axial direction from the top surface of the wiring board 600.
- the first connection terminal 41 of the coil 40 is similarly inserted through the second through hole 520 of the bracket 500 and the first through hole 610 of the wiring board 600.
- the first connection terminal 41 of the coil 40 also protrudes upward in the axial direction from the top surface of the wiring board 600.
- the first through hole 610 and the second through hole 520 are positioned so as to overlap the first connection terminal 41 and the second connection terminal 42 of the coil 40, respectively, when viewed from the axial direction (see also FIG. 1).
- the first through holes 610 are also provided on the inner circumference side and the outer circumference side along the radial direction.
- the first through holes 610 are also provided on the inner circumference side and the outer circumference side at the same intervals in the circumferential direction as the arrangement intervals of the coils 40.
- the first through holes 610 on the inner circumference side and the first through holes 610 on the outer circumference side are arranged with a predetermined interval of deviation in the circumferential direction. The amount of deviation is the same as the amount of deviation in the circumferential direction between the first connection terminal 41 and the second connection terminal 42 of the coil 40.
- the width of the terminal holding portion 523 is the same as the width of the second connection terminal 42 or is wider by a predetermined value.
- the width of the lower end of the first opening 521 and the width of the upper end of the second opening 522 are each wider than the width of the second connection terminal 42.
- the predetermined value will be described later.
- the width of the first through hole 610 is wider than the width of the second connection terminal 42. However, the width of the first through hole 610 is narrower than the width of the upper end of the second opening 522.
- the relationship in size between the width of the first connection terminal 41 and the width of each portion of the second through hole 520 and the width of the first through hole 610 is similar to the relationship in size between the width of the second connection terminal 42 and the width of each portion of the second through hole 520 and the width of the first through hole 610 described above.
- Fig. 6A is a diagram showing one step of the assembly process of the motor 1000 according to the embodiment.
- Fig. 6B is a diagram showing a step subsequent to the step shown in Fig. 6A.
- Fig. 6C is a diagram showing a step subsequent to the step shown in Fig. 6B.
- Fig. 6D is a diagram showing a step subsequent to the step shown in Fig. 6C.
- Fig. 6E is a diagram showing a step subsequent to the step shown in Fig. 6D.
- stator 100 When assembling the motor 1000, first prepare the stator 100 as shown in FIG. 6A. As shown in FIG. 6A, multiple teeth 10 are connected to the inner circumference of the yoke 20. An insulator 50 is attached to each of the multiple teeth 10. A coil 40 is attached to each of the multiple teeth 10 via the insulator 50. The first connection terminal 41 and the second connection terminal 42 of the coil 40 protrude upward in a straight line.
- the stator 100 is housed in the motor case 400.
- the rotor 200 is housed inside the stator 100.
- a part of the rotating shaft 210 protrudes to the outside of the motor case 400 through an opening provided at the bottom of the motor case 400.
- the bearings 310 and 320 are attached to the rotating shaft 210.
- the bearing cover 410 is attached to the upper surface of the rotor 200, covering the bearing 320.
- the bracket 500 is attached to cover the motor case 400.
- the first connection terminal 41 and the second connection terminal 42 of the coil 40 are inserted through the first opening 521 of the second through-hole 520 of the bracket 500, and protrude above the second opening 522.
- the width of the lower end of the first opening 521 is wider than the width of each of the first connection terminal 41 and the second connection terminal 42. Therefore, the first connection terminal 41 and the second connection terminal 42 can be smoothly inserted into the second through hole 520.
- the width of the terminal holding portion 523 is the same as the width of each of the first connection terminal 41 and the second connection terminal 42, or is wider by a predetermined value than each of them. Therefore, when the first connection terminal 41 and the second connection terminal 42 are inserted into the second through hole 520, excessive resistance is not applied to the first connection terminal 41 and the second connection terminal 42. Therefore, the first connection terminal 41 and the second connection terminal 42 can be inserted into the second through hole 520 without deforming the first connection terminal 41 and the second connection terminal 42.
- the inner peripheral surface of the terminal holding portion 523 restricts the first connection terminal 41 and the second connection terminal 42 from moving circumferentially, radially, and axially inside the second through hole 520 during and after installation of the bracket 500.
- the first connection terminal 41 and the second connection terminal 42 are positioned in an aligned state and inserted into the second through hole 520.
- the width of the upper end of the second opening 522 is wider than the width of each of the first connection terminal 41 and the second connection terminal 42. Therefore, the first connection terminal 41 and the second connection terminal 42 are smoothly inserted into the second through hole 520. This allows the first connection terminal 41 and the second connection terminal 42 to protrude upward from the upper surface of the bottom plate of the bracket 500 without being deformed.
- the three bolt holes 570 provided in the bracket 500 are positioned so as to overlap with the three bolt holes 420 provided in the flange portion of the motor case 400.
- the number of bolt holes 570 and bolt holes 420 may be more than three.
- the wiring board 600 is accommodated in the board accommodation portion 510 of the bracket 500.
- the first connection terminal 41 and the second connection terminal 42 protruding upward from the bottom plate of the bracket 500 are each inserted into the first through hole 610.
- the width of the first through hole 610 is wider than the width of the first connection terminal 41 and the second connection terminal 42. Therefore, the first connection terminal 41 and the second connection terminal 42 are each smoothly inserted into the first through hole 610. This allows the first connection terminal 41 and the second connection terminal 42 to protrude upward from the upper surface of the wiring board 600 without being deformed.
- the first connection terminal 41 and the second connection terminal 42 inserted into the first through hole 610 are each connected to wiring (not shown) provided on the upper surface of the wiring board 600 via a conductive adhesive 640.
- the conductive adhesive 640 is metal solder. However, it is not particularly limited to this. When the amount of current supplied to the coil 40 is small, the conductive adhesive 640 may be a resin in which conductive particles are dispersed.
- the width of the upper end of the second opening 522 in the second through hole 520 is wider than the width of the first through hole 610.
- the width of the lower end of the second opening 522 is the same as the first connection terminal 41 and the second connection terminal 42, or is wider by a predetermined value than these. Therefore, even if the conductive adhesive 640 flows downward through between the first through hole 610 and the first connection terminal 41 or the second connection terminal 42, it remains inside the second opening 522 and does not drip further downward, that is, onto the stator 100 or the rotor 200.
- the aforementioned predetermined value refers to a width that prevents the conductive adhesive 640 that flows down through between the first through hole 610 and the first connection terminal 41 or the second connection terminal 42 from passing further downward.
- cover 700 is attached to bracket 500, covering board housing portion 510 housing wiring board 600.
- bolt holes are provided on the underside of cover 700 at positions that overlap bolt holes 420 of motor case 400 and bolt holes 570 of bracket 500 when viewed from the axial direction.
- bolt 800 with washer 810 inserted is inserted through bolt hole 420 of motor case 400, bolt hole 570 of bracket 500, and bolt hole of cover 700, and fastened.
- a flanged bolt in which a flange (washer) is integrally formed with the bolt may be used instead of washer 810 and bolt 800.
- bracket 500, wiring board 600, and cover 700 are each positioned and attached and fixed to motor case 400, which houses stator 100 and rotor 200. This completes the assembly of motor 1000.
- the motor 1000 includes a cylindrical motor case 400 with a bottom, a rotor 200, and a stator 100.
- the rotor 200 has a rotating shaft 210 including an axis C extending in the axial direction.
- the stator 100 is disposed at a predetermined distance from the rotor 200 in the radial direction.
- the stator 100 and the rotor 200 are housed inside the motor case 400 while maintaining the above-mentioned positional relationship.
- the motor 1000 includes a bracket 500, a cover 700, and a wiring board 600.
- the bracket 500 has a board housing portion 510 that is a recess, and is made of an insulating material arranged to cover the opening of the motor case 400.
- the cover 700 is attached to the bracket 500 so as to cover the board housing portion 510.
- the wiring board 600 is housed in the board housing portion 510 and attached to the bracket 500.
- the stator 100 has an annular yoke 20, a number of teeth 10 connected to the inner circumference of the yoke 20 at predetermined intervals, and a number of coils 40 attached to each of the teeth 10.
- the coil 40 has a first connection terminal 41 at one end and a second connection terminal 42 at the other end.
- the first connection terminal 41 and the second connection terminal 42 each protrude upward in a straight line.
- the wiring board 600 has a plurality of first through holes 610.
- the bracket 500 has a plurality of second through holes 520.
- the first connection terminal 41 and the second connection terminal 42 are inserted through the plurality of second through holes 520, so that the first connection terminal 41 and the second connection terminal 42 are positioned in an aligned state.
- the multiple first through holes 610 and the multiple second through holes 520 are provided at positions overlapping the first connection terminal 41 and the second connection terminal 42.
- the first connection terminal 41 and the second connection terminal 42 are each inserted through a plurality of first through holes 610 and a plurality of second through holes 520.
- the first connection terminal 41 and the second connection terminal 42 are connected to wiring provided on the wiring board 600.
- the first connection terminal 41 and the second connection terminal 42 are electrically connected to an external power source via the wiring.
- connection work between the coil 40 and the wiring provided on the wiring board 600 can be performed easily and reliably.
- a bracket 500 having a second through hole 520 provided at a position overlapping the first connection terminal 41 and the second connection terminal 42 when viewed from the axial direction is provided between the wiring board 600 and the stator 100.
- the wiring board 600 also has a first through hole 610 provided at a position overlapping the first connection terminal 41 and the second connection terminal 42, and further the second through hole 520 when viewed from the axial direction.
- the first connection terminal 41 and the second connection terminal 42 are inserted into the two second through holes 520, respectively, and are positioned and fixed in an aligned state. Furthermore, in this state, the first through hole 610 is aligned with the first connection terminal 41 and the second connection terminal 42, and the wiring board 600 is attached to the bracket 500. As a result, the first connection terminal 41 and the second connection terminal 42 are inserted into the two first through holes 610, respectively. The coil 40 and wiring provided on the wiring board 600 are connected to the first through hole 610.
- first connection terminal 41 and the second connection terminal 42 can be connected to the wiring provided on the wiring board 600 while being positioned in the first through hole 610. This ensures that the first connection terminal 41 and the second connection terminal 42 can be reliably connected to the wiring provided on the wiring board 600.
- a plurality of second through holes 520 are provided in the bracket 500, and a plurality of first through holes 610 are provided in the wiring board 600.
- the plurality of second through holes 520 are arranged in the bracket 500 at positions that overlap the first connection terminal 41 and the second connection terminal 42 when viewed from the axial direction of the first through holes 610 and the second through holes 520. In this manner, as disclosed in Patent Documents 1 to 3, it is not necessary to individually align and connect the first connection terminal 41 and the second connection terminal 42 to the wiring provided on the wiring board 600. This simplifies the connection work.
- Each of the second through holes 520 has a first opening 521 provided below along the axial direction, a second opening 522 provided above, and a terminal holding portion 523 that communicates with the first opening 521 and the second opening 522.
- the first opening 521 and the second opening 522 each have a wider radial width than the terminal holding portion 523.
- first connection terminal 41 and the second connection terminal 42 can be smoothly inserted into the two corresponding second through holes 520, respectively.
- the radial width of the first opening 521 which is the entrance to each second through hole 520, is wider than the radial width of the second opening 522.
- the radial width of the terminal holding portion 523 is the same as the radial width of the first connection terminal 41 and the second connection terminal 42, or is wider by a specified value.
- the first connection terminal 41 or the second connection terminal 42 can be inserted into each second through hole 520. Furthermore, after insertion, each of the first connection terminal 41 and the second connection terminal 42 is restricted from moving circumferentially, radially, and axially inside the second through hole 520. This positions the first connection terminal 41 and the second connection terminal 42 in an aligned state, making it easier to insert the first connection terminal 41 and the second connection terminal 42 into the two corresponding first through holes 610 in the subsequent process.
- the bracket 500 is preferably formed by molding an insulating material such as resin.
- an insulating material such as resin.
- the diameter is constant in the thickness direction of the plate. Therefore, it is difficult to form the second through hole 520 by drilling.
- bracket 500 when forming the bracket 500 by pouring resin into a mold and performing molding, as shown in this embodiment, it is not particularly difficult to change the width of the second through hole 520 in the depth direction. Furthermore, this type of molding process also makes it easy to form the bearing accommodating portion 550 and the rib 560.
- the coil 40 is preferably a molded body made by winding a conductor wire and laminating it into n turns (n is a natural number).
- the applied voltage is around 100V to 200V.
- the number of turns in the winding must be increased to obtain the required rotating magnetic field.
- the wire diameter of the wire that makes up the coil must be reduced.
- the wire diameter is small, so as mentioned above, the end of the coil can be wrapped around the terminal pin and the coil can be connected to the wiring board via the terminal pin.
- the aforementioned molded body has a significantly higher bending rigidity in the direction perpendicular to the longitudinal direction of the wires than ordinary round copper wires. This makes it difficult to use conventional methods such as winding the ends of the coils around terminal pins or fitting the ends of the coils into fixing grooves in an insulator.
- the bending rigidity of the molded body has the above-mentioned characteristics, it is not difficult to maintain the shape of the first connection terminal 41 and the second connection terminal 42, which are the ends of the coil 40, while keeping them protruding in a straight line.
- the first connection terminal 41 and the second connection terminal 42 that protrude linearly can be aligned and positioned by the second through holes 520 provided in the bracket 500.
- the first connection terminal 41 and the second connection terminal 42 can be easily connected to the wiring provided on the wiring board 600.
- the wire that constitutes the coil 40 does not need to be a molded body. It is sufficient that the first connection terminal 41 and the second connection terminal 42, which are the ends of the coil 40, can be kept protruding in a straight line and their shape can be maintained.
- FIG. 7 is an enlarged view of the first connection terminal 41 and the second connection terminal 42. From the viewpoint of making it easier to insert the first connection terminal 41 and the second connection terminal 42 into the second through-hole 520, the tip shapes of the first connection terminal 41 and the second connection terminal 42 may each be chamfered as shown in FIG. 7.
- Fig. 8 is a view of a second through hole 520 according to a modified example seen from below.
- the same reference numerals are used for the same parts as in the embodiment, and detailed explanations thereof will be omitted.
- the second through hole 520 of the modified example shown in FIG. 8 differs from the second through hole 520 shown in FIG. 3C in that a plurality of grooves 524 are provided on the inner peripheral surface.
- the contact area between the inner peripheral surface of the second through hole 520 and the first connection terminal 41 and the second connection terminal 42 can be reduced. This reduces the frictional resistance with the inner peripheral surface of the second through hole 520, allowing the first connection terminal 41 and the second connection terminal 42 to be smoothly inserted into the second through hole 520.
- first connection terminal 41 and the second connection terminal 42 it is preferable to form a plurality of grooves 524 on the inner circumferential surface of the first opening 521, which corresponds to the entrance of the first connection terminal 41 and the second connection terminal 42, among the inner circumferential surface of the second through hole 520, as shown in FIG. 8.
- the motor disclosed herein allows easy and reliable connection between the ends of the coil and the wiring provided on the wiring board. This makes the motor disclosed herein useful for a variety of electrical products.
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- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
Description
[モータの構成]
図1は、実施形態に係るモータ1000の分解斜視図である。図2は、実施形態に係るモータ1000の断面図である。
図3Aは、ブラケット500を上方から見た斜視図である。図3Bは、ブラケット500を下方から見た斜視図である。図3Cは、第2貫通孔520を下方から見た図である。図3Dは、図3CのIIID-IIID線での断面図である。図3Eは、図3CのIIIE-IIIE線での断面図である。
図4は、実施形態に係るモータ1000におけるコイル40の第2接続端子42近傍の断面図である。図5は、図4の破線で囲まれた部分の拡大図である。
図6Aは、実施形態に係るモータ1000の組立工程の一工程を示す図である。図6Bは、図6Aに示す工程の続きの工程を示す図である。図6Cは、図6Bに示す工程の続きの工程を示す図である。図6Dは、図6Cに示す工程の続きの工程を示す図である。図6Eは、図6Dに示す工程の続きの工程を示す図である。
以上説明したように、本実施形態に係るモータ1000は、有底筒状のモータケース400と、ロータ200と、ステータ100と、を備えている。ロータ200は、軸方向に延伸する軸心Cを含む回転軸210を有する。ステータ100は、ロータ200と径方向に所定の間隔をあけて配置されている。ステータ100とロータ200とは、前述した配置関係を保って、それぞれモータケース400の内部に収容されている。
図8は、変形例に係る第2貫通孔520を下方から見た図である。なお、説明の便宜上、図8において、実施形態と同様の箇所については同一の符号を付して詳細な説明を省略する。
20 ヨーク
30 ステータコア
31 スロット
40 コイル
41 第1接続端子
42 第2接続端子
50 インシュレータ
100 ステータ
200 ロータ
210 回転軸
220 ロータコア
230 磁石
310,320 軸受
400 モータケース
410 軸受カバー
420 ボルト孔
500 ブラケット
510 基板収容部(凹部)
520 第2貫通孔
521 第1開口
522 第2開口
523 端子保持部
524 溝
530 電源接続口
540 引き出し配線
550 軸受収容部
560 リブ
570 ボルト孔
600 配線基板
610 第1貫通孔
620 駆動制御回路
630 回路部品
640 導電性接着材
700 カバー
710 放熱フィン
1000 モータ
Claims (8)
- 有底筒状のモータケースと、
前記モータケースの内部に収容され、軸方向に延伸する軸心を含む回転軸を有するロータと、
前記モータケースの内部に収容され、かつ前記ロータと所定の間隔をあけて配置されたステータと、
凹部を有し、前記モータケースの開口を覆うように配置された絶縁材料からなるブラケットと、
前記凹部を覆うように前記ブラケットに取り付けられたカバーと、
前記凹部に収容され、前記ブラケットに取り付けられた配線基板と、を備え、
前記ステータは、
前記軸心を中心とする環状のヨークと、
前記ヨークの内周に所定の間隔をあけて配置された複数のティースと、
前記複数のティースの各々に装着されたコイルと、を有し、
前記コイルは、一端に第1接続端子を、他端に第2接続端子を有し、前記第1接続端子及び前記第2接続端子はそれぞれ、前記軸方向の一方に向けて直線状に突出しており、
前記配線基板は複数の第1貫通孔を有し、
前記ブラケットは、前記第1接続端子及び前記第2接続端子を整列させる複数の第2貫通孔を有し、
前記回転軸の長手方向を前記軸方向とするとき、
前記軸方向から見て、前記複数の第1貫通孔及び前記複数の第2貫通孔は、前記第1接続端子と前記第2接続端子とに重なる位置に設けられており、
前記第1接続端子及び前記第2接続端子は、それぞれ前記複数の第1貫通孔に挿通され、かつそれぞれ前記複数の第2貫通孔に挿通され、かつ前記配線基板に設けられた配線に接続されているモータ。 - 請求項1に記載のモータにおいて、
前記複数の第2貫通孔の各々は、下方に形成された第1開口と、上方に形成された第2開口と、前記第1開口及び前記第2開口に連通する端子保持部と、を有し、
前記軸方向と直交する径方向において、
前記第1開口及び前記第2開口はそれぞれ、前記端子保持部よりも前記径方向の幅が広いモータ。 - 請求項2に記載のモータにおいて、
前記第1開口の前記径方向の幅は、前記第2開口の前記径方向の幅よりも広いモータ。 - 請求項3に記載のモータにおいて、
前記端子保持部の前記径方向の幅は、前記第1接続端子及び前記第2接続端子の前記径方向の幅と同じか、前記径方向の幅よりも広いモータ。 - 請求項4に記載のモータにおいて、
前記複数の第2貫通孔の各々の内周面には複数の溝が設けられているモータ。 - 請求項4に記載のモータにおいて、
前記第2貫通孔の内周面には複数の突起が設けられているモータ。 - 請求項1に記載のモータにおいて、
前記第1接続端子及び前記第2接続端子のそれぞれの先端は、面取り形状を有するモータ。 - 請求項1~7のいずれか1項に記載のモータにおいて、
前記コイルは、導体からなる素線が巻回され、nターン(nは自然数)積層される成形体であるモータ。
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| JP3541449B2 (ja) | 1994-08-03 | 2004-07-14 | 株式会社安川電機 | コイル端末固定方法 |
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| JP2011151875A (ja) | 2010-01-19 | 2011-08-04 | Panasonic Corp | 同期回転機の固定子 |
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| JP2016073119A (ja) * | 2014-09-30 | 2016-05-09 | 日本電産株式会社 | モータ |
| WO2018135086A1 (ja) * | 2017-01-18 | 2018-07-26 | パナソニックIpマネジメント株式会社 | コイル成形体、その製造方法、モータ、及び、ステータの組立方法 |
| JP2019169992A (ja) * | 2018-03-22 | 2019-10-03 | 本田技研工業株式会社 | 捻り曲げ装置 |
| US20210296958A1 (en) * | 2020-03-17 | 2021-09-23 | Abb Schweiz Ag | Wiring apparatus for motor and corresponding motor |
| JP7024656B2 (ja) | 2018-08-08 | 2022-02-24 | 日本電産株式会社 | モータ |
| JP2023004065A (ja) * | 2021-06-25 | 2023-01-17 | 日本電産トーソク株式会社 | 電動ポンプ |
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2024
- 2024-04-15 WO PCT/JP2024/014927 patent/WO2024241752A1/ja active Pending
- 2024-04-15 CN CN202480033354.8A patent/CN121153187A/zh active Pending
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| JP3541449B2 (ja) | 1994-08-03 | 2004-07-14 | 株式会社安川電機 | コイル端末固定方法 |
| JP2004236992A (ja) * | 2003-02-07 | 2004-08-26 | Bambi:Kk | アジャスト用ピン保持部材およびそれを備えた時計バンド |
| JP2011151875A (ja) | 2010-01-19 | 2011-08-04 | Panasonic Corp | 同期回転機の固定子 |
| JP2013135527A (ja) * | 2011-12-26 | 2013-07-08 | Asmo Co Ltd | ステータの製造方法、ステータの製造装置及びステータ |
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| JP2019169992A (ja) * | 2018-03-22 | 2019-10-03 | 本田技研工業株式会社 | 捻り曲げ装置 |
| JP7024656B2 (ja) | 2018-08-08 | 2022-02-24 | 日本電産株式会社 | モータ |
| US20210296958A1 (en) * | 2020-03-17 | 2021-09-23 | Abb Schweiz Ag | Wiring apparatus for motor and corresponding motor |
| JP2023004065A (ja) * | 2021-06-25 | 2023-01-17 | 日本電産トーソク株式会社 | 電動ポンプ |
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