CN202889059U - Molded motor - Google Patents
Molded motor Download PDFInfo
- Publication number
- CN202889059U CN202889059U CN2012205470847U CN201220547084U CN202889059U CN 202889059 U CN202889059 U CN 202889059U CN 2012205470847 U CN2012205470847 U CN 2012205470847U CN 201220547084 U CN201220547084 U CN 201220547084U CN 202889059 U CN202889059 U CN 202889059U
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- China
- Prior art keywords
- retainer
- outer casing
- axial
- motor
- axle
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
- H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/34—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation
- H02K3/345—Windings characterised by the shape, form or construction of the insulation between conductors or between conductor and core, e.g. slot insulation between conductor and core, e.g. slot insulation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/08—Insulating casings
Abstract
The utility model provides a molded motor (1) which is provided with a rotor (3), a molded shell (6), bearing retainers (11a, 11b), bearings (10a, 10b) and a bracket (7), wherein the rotor (3) is provided with a shaft (8) and a rotor magnet (9); the shaft (8) is fixedly provided with a cylindrical shaft fixing part (34); the bearing retainers (11a, 11b) are provided with cylinder parts (48) and bottom parts (500); and the axial length of the shaft fixing part (34) is longer than that of a peripheral side cylinder part (35). In other words, the shaft fixing part (34) is mounted in a manner that the connecting length relative to the shaft (8) is long, and therefore, the rotor (3) can be firmly fixed on the shaft (8). The distance between the shaft fixing part (34) of the rotor (3) and the bottom parts (500) is greater than the axial distance between the rotor magnet (9) and the molded shell (6). Thus, the axial appropriate positioning can be carried out on the shaft (8) relative to bearing parts.
Description
Technical field
The utility model belongs to the relevant technical field of moulding motor.
Background technology
TOHKEMY 2010-110029 communique discloses a kind of moulding motor, and it has by resin stator and circuit board have been carried out molded motor frame.Radially inner side at stator disposes the rotor that rotating shaft has been installed.Rotating shaft is supported for and can rotates by pair of bearings.
The bearing casing is formed at motor frame.At the bearing casing bearing bracket is installed.Bearing is contained in bearing bracket.Open side at motor frame is equipped with metal carriage.Bearing also is contained in carriage.
And TOHKEMY 2004-129418 communique discloses a kind of configuration pre-compressed spring between bearing and bearing casing and bearing has been applied the motor of precompressed.Thus, attempt to reduce vibration and the noise of motor.
The utility model content
The related motor of the utility model comprises rotor, molding outer casing, retainer, bearing and carriage.Rotor has axle and rotor magnet.Be fixed with axle fixed part cylindraceous at axle.Retainer has cylindrical portion and bottom.The axial length of axle fixed part is longer than the axial length of periphery side tube part.That is to say that the axle fixed part is installed in the long mode of connecting length with respect to axle.Therefore, rotor is firmly secured to axle.And, make the axle fixed part of rotor and the distance between the bottom larger than the axial distance between rotor magnet and molding outer casing.Therefore, can carry out axial appropriate location with respect to bearing portion.
Description of drawings
Fig. 1 is the cutaway view of the related motor of execution mode.
Fig. 2 A is from the inboard stereogram of observing carriage of motor.
Fig. 2 B is the stereogram of observing carriage from the motor outside.
Fig. 3 is the vertical view from the inboard carriage of observing of motor.
Fig. 4 is the vertical view of observing the motor behind the dismounting carriage from the axis direction of motor.
Fig. 5 is the key diagram for the manufacture method of explanation carriage.
Fig. 6 is from the open side of molding outer casing and observes one from radial outside and fix (holding) stereogram of the molding outer casing of stator is arranged.
Fig. 7 fixes (holding) from the open side observation one of molding outer casing the vertical view of the molding outer casing of stator is arranged.
Fig. 8 is the cutaway view of retainer.
Fig. 9 is the cutaway view of the mounting structure of the carriage in the execution mode 4.
Figure 10 is the cutaway view of the mounting structure of the carriage in the execution mode 5.
Embodiment
The rotor of the disclosed moulding motor of TOHKEMY 2010-110029 communique and the connecting length of axle are short, can not obtain enough constant intensities.
The rotor of the disclosed motor of TOHKEMY 2004-129418 communique fixes magnet across iron core.That is to say that iron core has enough connecting lengths with respect to axle and is fixed.But the quality of rotary body is owing to the weight of iron core becomes greatly, so rotation efficiency is bad.
The purpose of this utility model is with respect to the axle fixed magnet time, can obtain enough constant intensities and can carry out rightly axle with respect to the axial location of bearing portion.
The related motor of the utility model has rotor, armature, molding outer casing, retainer, bearing and carriage.Rotor has along the axle of downward-extension on the central axis and rotor magnet.Be fixed with axle fixed part cylindraceous at axle.Rotor magnet directly or indirectly is fixed in the axle fixed part.Armature has armature core and coil.Armature core has iron core back and a plurality of tooth of ring-type.The iron core back of ring-type is configured in the radial outside of rotor magnet.Tooth is outstanding towards radially inner side from the iron core back.And the inner face of tooth and rotor magnet are at diametrically contraposition.Coil is at the tooth wire of reeling.Molding outer casing has circular bottom wall portion and hub portion.Molding outer casing is contained in inside with armature, and towards axial upper side opening.Bottom wall portion is positioned at the axial below of armature.Hub portion is given prominence to below axially at the central part of bottom wall portion.Hub portion has the wheel hub through hole along central axis.Retainer has cylindrical portion and bottom.The bottom has the retainer through hole that inserts for axle in central authorities.Retainer is supported in wheel hub.Retainer is for there being the round-ended cylinder shape.Bearing is contained in retainer and back shaft.The open side of the Overmolded shell of carriage.And carriage supports the bearing of back shaft.The inner peripheral surface of the regulation wheel hub through hole of molding outer casing has large-diameter portion and minor diameter part.Large-diameter portion is at axial downside spring bearing retainer.Minor diameter part in the axial direction side is less than the external diameter of described retainer.Retainer is supported in minor diameter part with the state that bottom side becomes upside.The upper end of the cylindrical portion of retainer contacts axial with minor diameter part.The internal diameter of the lower axial end of the interior diameter ratio shaft fixed part of minor diameter part is large.Axle fixed part and the distance between the bottom of rotor are larger than the axial distance between rotor magnet and molding outer casing.
According to said structure, the rotor of motor and axle are fixed securely, and can carry out rightly axle with respect to the axial location of bearing portion.
The first execution mode
Fig. 1 is called motor 1 below the related moulding motor 1(of execution mode of the present utility model is shown).Motor 1 is Brushless DC motor, for example is used for driving the cross flow fan of indoor apparatus of air conditioner.
Motor 1 has armature 2 and motor chassis 5.Armature 2 is cylindrical shape.Motor chassis 5 consists of in inside the spatial accommodation 4 that holds rotor 3.Motor chassis 5 has molding outer casing 6 and carriage 7.Molding outer casing 6 is towards the upper side opening.Molding outer casing 6 be shaped as the round-ended cylinder shape.The open side of carriage 7 Overmolded shells 6.Being shaped as of carriage 7 is discoid, and armature 2 is imbedded in the molding outer casing 6 by resin.At this moment, the inner peripheral surface of armature 2 exposes.Rotor 3 is coaxial with the armature 2 of ring-type, and is configured in the radially inner side of armature 2.Axle 8 is installed on rotor 3.Axle 8 is supported for and can rotates by motor chassis 5 by a pair of ball bearing 10a, 10b.One of them ball bearing 10a is installed on the bottom wall portion 13 of molding outer casing 6 by retainer 11a.Another ball bearing 10b is installed on carriage 7 by retainer 11b.The terminal part of axle 8 and the back shaft of cross flow fan are connected in series.One end of the back shaft of cross flow fan is supported for and can rotates by fan spindle bearing.Omit the diagram about cross flow fan here.
In addition, in Fig. 1, axis P is the line that extends along the center of axle 8.In the following description, will be defined as along the direction of axis P " axially ", will be defined as " radially " with the direction of axis P quadrature, will be defined as around the direction of axis P " circumferentially ".And, motor shown in Figure 11 axially, with respect to rotor 3 ball bearing 10b side is defined as " on ", with respect to rotor 3 ball bearing 10a side is defined as D score.
Molding outer casing 6 integral body are made of resin material.Molding outer casing 6 has the motor covering section 22 of cylindrical portion 21, discoid bottom wall portion 13 and ring-type.Cylindrical portion 21 is around the periphery of armature 2.Bottom wall portion 13 is positioned at the axial below of armature 2.And bottom wall portion 13 is extended towards radially inner side near the lower end of inboard insulating part wall 19.Armature 2 is covered by the inner peripheral surface of cylindrical portion 21 and bottom wall portion 13 and motor covering section 22, and is moulded.In the present embodiment, use unsaturated polyester (UP) as the moulded resin of molded and shaped usefulness.
Manufacture method to molding outer casing 6 is narrated.Behind the armature 2 coiling windings that insulate by insulating part 17, armature 2 is inserted in the mould.Resin by injection in mould and shaping mould shell 6 processed.At this moment, resin is injected into by high pressure.Therefore, armature 2 is positioned by the end face of pressing insulating part 17 with the pin of being located at mould.Therefore, can suppress to tilt owing to the pressure that injects causes the posture of armature 2 in mould.After the moulding, molding outer casing 6 is unloaded from mould, the pin vestige 23 of mould remains in molding outer casing 6.
Molding outer casing 6 has hub portion 24 at the central part of bottom wall portion 13.Hub portion 24 is outstanding towards axial below.Hub portion 24 has wheel hub through hole 25.In wheel hub through hole 25 and axle 8 arranged coaxial retainer 11a is arranged.The inner peripheral surface of the regulation wheel hub through hole 25 of molding outer casing 6 has large-diameter portion 250 and minor diameter part 251.Be supported with retainer 11a at large-diameter portion 250 at axial downside.Minor diameter part 251 is configured in the axial upside of the inner peripheral surface of molding outer casing 6.Minor diameter part 251 is less than the external diameter of retainer 11a.Retainer 11a has been shaped as the round-ended cylinder shape.Retainer 11a has cylindrical portion 48 and bottom 500.500 central authorities have the retainer through hole 501 that inserts for axle 8 in the bottom.The bottom wall portion 13 one-body molded (insertion moulding) of retainer 11a and molding outer casing 6.And retainer 11a is by being supported the movement of axial (axis direction of axle 8) that limit retainer 11a by wheel hub 24.And retainer 11a also can bottom 500 sides become the mode of upside and be pressed into fixing.The upper end of the cylindrical portion 48 of retainer 11a is by axially contacting the movement that has limited to axial upside with minor diameter part 251.
And carriage 7 has outstanding hub portion 26 above axially at central part.Hub portion 26 has carriage through hole 27.Retainer 11b and axle 8 are configured in carriage through hole 27 coaxially.The inner peripheral surface of the regulation carriage through hole 27 of carriage 7 in the axial direction side has large-diameter portion 270.The inner peripheral surface of carriage 7 has minor diameter part 271 at axial downside.Retainer 11b is for there being the end roughly cylindric, and has cylindrical portion 48 and bottom 500.500 central authorities have the retainer through hole 501 that inserts for axle 8 in the bottom.Retainer 11b also can be when carriage 7 be injection molding moulding and carriage 7 one-body molded (insertion moulding), and is supported by hub portion 26.At this moment, the movement of retainer 11b axial (axis direction of axle 8) is limited more securely.And retainer 11b also can be pressed in the inner peripheral surface of hub portion 26 and be contained in carriage through hole 27.Retainer 11b is pressed into fixing in the mode that bottom 500 sides become downside.Retainer 11b is axially contacting the location of carrying out with carriage 7 by the lower end that makes cylindrical portion 48 with minor diameter part 271.And the mode that retainer 11b also can bottom 500 sides becomes upside is pressed into.
And shown in Fig. 1 and Fig. 2 A and Fig. 2 B, carriage 7 has the cylindric connection board 29 that is pressed into section 28, hub portion 26 and is connected shape.Cylindricly be pressed into the radial outside that section 28 is positioned at hub portion 26.The cylindric section 28 that is pressed into is pressed in the inner peripheral surface of the end of the open side of molding outer casing 6.Connect board 29 and connect hub portion 26 and the cylindric section 28 that is pressed into.
Be formed with to the outstanding flange board 30 of radial outside in the cylindric radial outer end section that is pressed into section 28.Flange board 30 is positioned at the cylindric axial upside that is pressed into section 28.The lower surface of flange board 30 is pressed under the state of molding outer casing 6 with the axial end of the open side of molding outer casing 6 at carriage 7 and contacts.Thus, when carriage 7 is pressed into molding outer casing 6, easily determined the axial location that carriage 7 is pressed into.
And the lower surface of flange board 30 has three locating pieces 80 arranging circumferentially being spaced from each other predetermined space.Three locating pieces 80 are pressed into respectively in three location indentations 81.Three location indentations 81 are formed at the end face of the open side of molding outer casing 6.Be connected the circumferential location of finishing carriage 7 with location indentations 81 by locating piece 80.And consisting of has carriage 7 with respect to the spline part of molding outer casing 6.Locating piece 80 and recess 81 circumferentially be not configured five equilibrium.Therefore, when this structure is pressed into molding outer casing 6 at carriage 7, can prevents and to be become the assembling parts of carriage 7 in molding outer casing 6 by misidentification.At this moment, also can prevent by the circumferential width difference separately that makes locating piece 80 and recess 81 wrong assembling parts.
Such as Fig. 3 and shown in Figure 4, each locating piece 80 extends to the outer peripheral edges of flange board 30 towards radial outside from the cylindric outer peripheral face that is pressed into section 28.The height of each locating piece 80 equates with the cylindric height that is pressed into section 28.Locating piece 80 and the cylindric end face that is pressed into the motor inboard of section 28 link to each other continuously and are positioned on the same face.
Each locating piece 80 is observed from the axis direction of carriage 7 and is the circular-arc of circumferential length.The circumferential two sides of each locating piece 80 are along with the radially inner side from carriage 7 tilts laterally towards week toward the outer side.As shown in Figure 3, inclined angle alpha is in for example 2 °～5 ° scope.Equally, the location indentations 81 of molding outer casing 6 also tilts to the circumferential outside along with the radially inner side from molding outer casing 6 makes circumferential two sides 81a toward the outer side.Angle of inclination beta is slightly less than inclined angle alpha.Thus, tilt by the circumferential two sides that make locating piece 80 and can locating piece 80 be securely fixed in location indentations 81 by wedge effect.
The upper surface that connects board 29 has a plurality of ribs 47.A plurality of ribs 47 extend to cylindric section's 28 sides that are pressed into from hub portion 26 sides.A plurality of ribs 47 form radial centered by hub portion 26.Thus,, improved in rib 47 rigidity of carriage 7 by being set, and the off-centre when having done one's utmost to suppress axle 8 rotation.
Next the manufacture method of carriage 7 described.As shown in Figure 5, carriage 7 is by to the indurative resin material of die cavity 107 injection heats that forms between patrix 105 and the counterdie 106 and make the resin material sclerosis and moulding.In the present embodiment, patrix 105 and counterdie 106 land area 108 that constitutes both just in time is positioned at minor diameter part 271.Thus, can prevent from being formed at the die parting line that products formed produces the inner peripheral surface of large-diameter portion 270, thereby improve retainer 11b to the assembly precision (even assembly precision of ball bearing 10b) of carriage 7.Therefore, can prevent the off-centre of axle 8.
And, in the manufacturing based on above-mentioned thermosetting resin, when thermosetting resin hardens in die cavity, in the hub portion 26 generation distortion that skew radially.Therefore, the problem that exists the cylindricity of the carriage through hole 27 of the inboard be formed on hub portion 26 to reduce.To this, in the present embodiment, shown in Fig. 2 A and Fig. 2 B, interior all side edge parts of the connection board 29 of carriage 7 consist of flank 83.Flank 83 is to the outstanding side protuberance of hub portion 26, the base end part of supporting wheel hub section 26.Thus, by flank 83 is set, skewing in the time of can preventing the sclerosis of hub portion 26.And, can improve as much as possible the rigidity radially of hub portion 26 by flank 83 is set.At this, be formed with recess 84 so that the thickness of flank 83 is not excessive at the back side of flank 83.Thus, it is bad to prevent from producing at flank 83 moulding such as shrink marks.
Outer peripheral face in the hub portion 24 of the hub portion 26 of carriage 7 and molding outer casing 6 is embedded with respectively the antivibrating parts 31 that is formed by rubber.Antivibrating parts 31 is made of vibrationproof body 32 and the flange part 33 of ring-type.The outer peripheral face of the inner peripheral surface of vibrationproof body 32 and hub portion 26 or hub portion 24 connects airtight.Flange part 33 is outstanding to radial outside from an axial end of vibrationproof body 32.
Rotor 3 has axle 8 and rotor magnet 9.Axle 8 extends along the cylindrical direction of molding outer casing 6.Rotor magnet 9 is fixed in axle 8 directly or indirectly.Rotor 3 has interior all side tube parts 34 cylindraceous and periphery side tube part 35 cylindraceous and discoid connecting portion 36.In other words, interior all side tube parts 34 are axle fixed part cylindraceous.Interior all side tube parts 34 are anchored on axle 8.Periphery side tube part 35 directly with magneticaction from armature core 14.All side tube parts 34 and periphery side tube part 35 in connecting portion 36 connects.Rotor 3 is made of the magnet resin that is combined with plastics in magnetic material.Rotor 3 is formed by injection mo(u)lding.That is to say, because rotor 3 is integrally formed, therefore can guarantee high rigidity.In addition, rotor 3 is such as also can being to form by will be divided into the outer peripheral face that a plurality of sintered magnets fits in yoke cylindraceous with binding agent etc.That is to say that rotor magnet 9 also can be fixed in axle 8 indirectly.Interior all side tube parts 34 and periphery side tube part 35 all form: wall thickness with the junction of connecting portion 36 for maximum, and along with from the wall thickness thickness towards axial both end sides and wall thickness reduces gradually.In other words, the axial length of interior all side tube parts 34 is longer than the axial length of connecting portion 36.In the present embodiment, the axial length of interior all side tube parts 34 is longer than the axial length of periphery side tube part 35.That is to say that interior all side tube parts 34 are installed in the long mode of connecting length with respect to axle 8.Thus, rotor 3 is firmly fixed at axle 8.
The fastening surface with rotor 3 at axle 8 is formed with spiral helicine slot part 37.When injection mo(u)lding rotor 3, the magnet resin is anchored on slot part 37.Thus, rotor 3 is firmly fastened in axle 8, and can prevents that rotor 3 from sliding and dallying around axle 8.
Between carriage 7 and rotor 3, dispose control substrate 38.As shown in Figure 6, control is fixed with the claw 85a of substrate 38 by two projections 85 of giving prominence to from motor covering section 22 to bracket side.Control contacts with the upper surface of motor covering section 22 with the lower surface of substrate 38.Control contacts with the lower surface of claw 85a with the upper surface of substrate 38.That is to say that control is passed through to be fixed with claw 85a clamping by motor covering section 22 with substrate 38.The base end part of each projection 85 and insulating part 17 are one-body molded.Claw 85a is formed on the terminal part of projection 85.
Be provided for carrying out PWM(Pulse Width Modulation in control with substrate 38: pulse-width modulation) control and motor drive circuit that motor 1 is rotated.Motor drive circuit has to each coil 20 of motor 1 provides the inverter circuit of drive current and the control circuit of control inverter circuit.Control with substrate 38 to be formed with the face of motor drive circuit one side be real estate 39 mode relative with the face of the motor inboard of carriage 7 and disposing.Control is provided with the box-like control IC40 of the cuboid that is built-in with control circuit with the real estate 39 of substrate 38.Control also can be installed under the state of molding outer casing 6 with the face of the motor inboard of carriage 7 at carriage 7 with IC40 and contact.
Control has the Magnetic Sensor 381 of the magnetic flux of detection rotor magnet 9 with substrate 38.Magnetic Sensor 381 is configured in the axial upside of rotor magnet 9.Control is controlled the drive current that provides to coil 20 with substrate 38 based on the detection signal of Magnetic Sensor 381.
Be formed be used to the circular hole 41 of avoiding with the interference of interior all side tube parts 34 of rotor 3 with substrate 38 in control.Interior all side tube parts 34 are by in the circular hole 41 and to more outstanding by the position of carriage 7 sides with substrate 38 than control.
Control has three pin bores 91 and four location holes 92 with substrate 38.The position that consists of pin bores 91 plays a role as the terminal that is electrically connected with armature 2.Location hole 92 is used for control with the circumferential location in the plane vertical with axle 8 of substrate 38.Such as Fig. 6 and shown in Figure 7, insert respectively alignment pin 93 at four location holes 92, insert altogether four alignment pins 93.Alignment pin 93 is outstanding from the face of the bracket side of motor covering section 22.
Insert respectively wiring pin 94 in control with three pin bores 91 of substrate 38, insert altogether three wiring pins 94.Three wiring pins 94 are outstanding from the face of the bracket side of motor covering section 22.Wiring pin 94 is electrically connected with coil 20.Three wiring pins 94 by be welded on control with on the Wiring pattern of substrate 38 and so that motor drive circuit be electrically connected with coil 20.
Also be connected with for the lead-in wire 42 that electric power is provided with each circuit on the substrate 38 to control with substrate 38 in control.As shown in Figure 6, lead-in wire 42 exports to outside the motor 1 between molding outer casing 6 and carriage 7, and is connected with external power source by connector.A pair of lining 43a, 43b are set between molding outer casing 6 and carriage 7.A pair of lining 43a, 43b are from radially clamping and anchor leg 42.A pair of lining 43a, 43b axially opposed radially to be extended with respectively the cross section be semicircular distribution trough 44.By 42 having embedded will go between under the state of distribution trough 44 and 42 export to outside the motor will going between, lead-in wire 42 fixedly secures and can carry out distribution along predetermined direction.The face with a side opposition side that is formed with distribution trough 44 at each lining 43a, 43b is formed with insertion groove 45.Lining 43a engages with protuberance 46a and fixes.Lining 43b engages with protuberance 46b and fixes.Therefore, finish each lining 43a, 43b in motor location radially. Protuberance 46a, 46b have insertion groove 45 at the peripheral part of molding outer casing 6.
Axle 8 is supported by ball bearing 10a, 10b.Ball bearing 10a, the 10b of these front and back is same parts.Ball bearing 10a, 10b are contained in retainer 11a, 11b.
Respectively from axially at ball bearing 10a, 10b back- up ring 51a, 51b being installed up and down.The outer ring of ball bearing 10a, 10b contacts with annulus section.Back- up ring 51a, 51b contact with ball bearing 10a, 10b inner ring.And, consist of the level pressure precompressed by leaf spring 12 is configured between retainer 11a and the ball bearing 10a.In addition, leaf spring 12 is also configurable between retainer 11b and ball bearing 10b.
In the present embodiment, contact with the annulus section 49 of retainer 11a by making ball bearing 10a, suppress rotor 3 and move towards axial below.Thus, limited the movement of rotor 3 to axial below, and prevented from contacting with bottom wall portion 13.And, owing to produce the axially power of below by the outer ring of 12 couples of ball bearing 10b of leaf spring, and back-up ring 51b contacts with the inner ring of ball bearing 10b, therefore inner ring is produced the axially power of top.Thus, because rotor 3 can only move to the direction that approaches with Magnetic Sensor 381, so the accuracy of detection of Magnetic Sensor 381 has improved.
In the present embodiment, 12 of leaf springs are configured between retainer 11a and the ball bearing 10a or between retainer 11b and the ball bearing 10b, consist of the level pressure precompressed.By this structure, remain on the state that makes rotor magnet 9 consistent with the Magnetic Sensor of stator core 14.Therefore, can be reduced in noise and the noise that produces in the motor driving.
And, because molding outer casing 6 has recess 81, be not drum therefore.Therefore, when being pressed into carriage 7, exist each displacement of molding outer casing 6 sides uneven, skew occurs axle when assembling may.But in the present embodiment, retainer 11a, 11b install towards the motor outside, and back-up ring 51a, 51b fixedly ball bearing 10a, 10b.At this moment, back-up ring 51a, 51b be fixedly ball bearing 10a, 10b not only, and also analog bracket 7.Therefore, since carriage 7 with get final product so workability raising the cooperating of semi-coast that be installed as of molding outer casing 6.
In assembling during motor 1, at first molded and shaped armature 2, and the molding outer casing 6 after having prepared retainer 11a one-body molded.And, prepare the one-body molded carriage 7 that retainer 11b is arranged.Next, the axle 8 that rotor 3 is installed is inserted in the inner peripheral surface of the ball bearing 10a that is installed in retainer 11a.Behind the inner peripheral surface with axle 8 insertion ball bearing 10a, back-up ring 51a is installed.Next, from the axial output shaft side of molding outer casing 6 control substrate 38 is installed.And, lining 43a is installed on molding outer casing 6,42 embedded wiring grooves 44 will go between.After the distribution of lead-in wire 42 is finished, lining 43b is installed on the axial upside of lining 43a.Next, carriage 7 is installed on molding outer casing 6 from the output shaft side of axle 8.Behind the installation bracket 7, ball bearing 10b is installed.Thus, when carriage 7 was installed in molding outer casing 6, axle 8 was inserted into the inner peripheral surface of ball bearing 10b.After ball bearing 10b is installed, back-up ring 51b is installed and fixing ball bearing 10b, thereby finishes the assembling of motor 1.
When rotor 3 was installed on molding outer casing 6, armature 2 was inhaled by magnetic picture with rotor 3, and rotor 3 is taken advantage of a situation and is inserted in the molding outer casing 6, and rotor 3 contacts with molding outer casing 6.At this moment, the distance of 500 of the bottoms of interior all side tube parts 34 of rotor 3 and retainer 11a is greater than the axial distance of 6 of the periphery side tube part 35 of rotor 3 and molding outer casings.And minor diameter part 251 is larger than the external diameter of the lower axial end section of interior all side tube parts 34.Thus, interior all side tube parts 34 can not contact with retainer 11a, and the supporting surface of the ball bearing 10a of retainer 11a can not be out of shape.And, even when the upper surface of the bottom 500 that makes minor diameter part 251 covering retainer 11a as variation, even when interior all side tube parts 34 contact with minor diameter part 251, also there is stress to be passed to the danger of the supporting surface distortion of retainer 11a, ball bearing 10a.Therefore, also same problem can occur in the structure shown in above-mentioned.That is to say that with interior all side tube parts 34 during at axial overlap, the distance that interior all side tube parts 34 and minor diameter part are 251 is larger than the axial distance of 6 of the periphery side tube part 35 of rotor 3 and molding outer casings at minor diameter part 251.
Yet, when consisting of carriage 7 with resin material like this, and consist of carriage 7 with metal material and compare, the machining accuracies such as dimensional accuracy are poor, therefore the cylindric external diameter precision that is pressed into section 25 of carriage 7 reduces, and carriage 7 increases with respect to the assembly error (for example, concentricity departs from) of molding outer casing 6.And owing to be used for also descending in the aperture precision that carriage 7 is installed the carriage through hole 27 of ball bearing 10b, so ball bearing 10b also increases with respect to the assembly error of carriage 7.Therefore, when adopting resinous carriage 7, there is such problem: these assembly error accumulations, make the off-centre of the axle 8 in the motor operations surpass tolerance band, thereby the running accuracy of axle 8 obviously reduces.To this, in the above-described embodiment, by making retainer 11b and carriage 7 one-body molded, can prevent the decline of the running accuracy of axle 8.
And, in the above-described embodiment, consisting of by making molding outer casing 6 and carriage 7 usefulness same resin materials, both coefficient of linear expansion equate.Therefore, heating (frictional heat of ball bearing 10a, 10b etc.) and outer temperature during owing to motor operations even the radial dimension of molding outer casing 6 and carriage 7 changes, also can maintain both quality of fits constant relation.Therefore, can prevent owing to the descend running accuracy of the axle 8 cause of both quality of fit descends and cooperates intensity to descend.
The second execution mode
In the above-described embodiment, retainer 11a and molding outer casing 6 are one-body molded, and the dimensional accuracy of the inner peripheral surface of the wheel hub through hole 24 of the regulation molding outer casing 6 of molding outer casing 6 is high, and retainer 11a also can be pressed into and be fixed in molding outer casing 6.And in the above-described embodiment, retainer 11b and carriage 7 are one-body molded, but the dimensional accuracy of the inner peripheral surface of the wheel hub through hole 26 of the regulation carriage 7 of carriage 7 is high, and retainer 11b also can be pressed into and be fixed in carriage 7.
The 3rd execution mode
In the above-described embodiment, because also there is error in carriage 7 at the assembling position to motor, therefore need bearing accuracy than shell side.Therefore, preferred retainer 11b and carriage 7 are one-body molded.
The 4th execution mode
In the above-described embodiment, carriage 7 is pressed in molding outer casing 6.For example, as shown in Figure 9, be formed with the teat 111 that the cross section is triangular shape in that the outer peripheral face of molding outer casing 6 is all-round.And the peripheral part of carriage 7 has the snap-latch piece 112 that engages with teat 111.Thus, carriage 7 is firmly fixed at molding outer casing 6 more.In addition, in the example of Fig. 9, engaging teat 111 is shaped in molding outer casing 6, and snap-latch piece 112 is fixed in carriage 7 by inserting moulding (perhaps bonding).
The 5th execution mode
Beyond above-mentioned execution mode, for example can constitute as shown in figure 10: be pressed under the state of molding outer casing 6 at carriage 7, component for fixing 113 is installed in molding outer casing 6 and carriage 7 from radial outside.In the example of Figure 10, component for fixing 113 is made of with a pair of stator 115 that is connected with the both ends of the length direction of band-like plate 114 band-like plate 114.Band-like plate 114 extends to the axle center of motor direction along the outer peripheral face of molding outer casing 6.Bottom wall portion 13 and the carriage 7 of a pair of stator 115 from motor drive shaft to sandwich molding outer casing 6.Component for fixing 113 is for example one-body molded by resin material.
Other execution modes
Structure of the present utility model is not limited to the respective embodiments described above, comprises various structures in addition.That is to say, in the respective embodiments described above, use unsaturated polyester (UP) as moulded resin, but be not limited thereto, also can use other resin materials.
And, in the respective embodiments described above, show an axial side opening of molding outer casing 6, also use carriage 7 to cover the example of openings.Be not limited thereto, the also both-side opening of the cylinder axis direction of molding outer casing 6, and cover respectively the opening of both sides with carriage 7.
In the respective embodiments described above, show the example that adopts leaf spring 12 at ball bearing 10a, the 10b of front and back, but as long as ball bearing 10a, 10b are applied precompressed, then can be the spring of various kinds.
In the utility model, towards the motor outside retainer 11a, 11b are installed.Therefore, enter easily in the environment of ball bearing 10a, 10b at dust and dust, can form the structure that is provided with lid etc.
The utility model provides a kind of and has been conducive in molding outer casing by the molded and shaped and moulding motor one fixed stator.
Claims (13)
1. a motor is characterized in that, this motor comprises:
Rotor, it has: axle, it is along downward-extension on the central axis; And rotor magnet, axle fixed part cylindraceous is fixed in described axle, and described rotor magnet is fixed in described axle fixed part directly or indirectly;
Armature, it has: armature core, and it has iron core back and a plurality of tooth of ring-type, and described iron core back is configured in the radial outside of described rotor magnet, described a plurality of tooth is outstanding towards radially inner side from described iron core back, and inner face and rotor magnet are at diametrically contraposition; And coil, it is by consisting of at described tooth coiling wire;
Molding outer casing, it has: circular bottom wall portion, it is positioned at the axial below of described armature; And hub portion, its central part in described bottom wall portion is given prominence to below axially, and has the wheel hub through hole along central axis, and described molding outer casing holds described armature in inside, and towards axial upper side opening;
The retainer of round-ended cylinder shape is arranged, and it has: cylindrical portion; And the bottom, it has the retainer through hole that inserts for axle in central authorities, and described retainer is supported on described hub portion;
Bearing, it is contained in described retainer, and supports described axle; And
Carriage, it covers the open side of described molding outer casing, and the bearing of back shaft is supported,
The inner peripheral surface of the described wheel hub through hole of the regulation of described molding outer casing has the large-diameter portion that supports described retainer at axial downside,
Described inner peripheral surface in the axial direction side has the minor diameter part less than the external diameter of described retainer,
Described retainer is supported in described minor diameter part with the state that described bottom side becomes upside,
The upper end of the described cylindrical portion of described retainer contacts axial with described minor diameter part,
The internal diameter of described minor diameter part is larger than the internal diameter of the lower axial end of described axle fixed part,
Described axle fixed part and the distance between described bottom of described rotor are larger than the axial distance between described rotor magnet and described molding outer casing.
2. a motor is characterized in that, this motor comprises:
Rotor, it has: axle, it is along downward-extension on the central axis; And rotor magnet, axle fixed part cylindraceous is fixed in described axle, and described rotor magnet is fixed in described axle fixed part directly or indirectly;
Armature, it has: armature core, and it has iron core back and a plurality of tooth of ring-type, and described iron core back is configured in the radial outside of described rotor magnet, described a plurality of tooth is outstanding towards radially inner side from described iron core back, and inner face and rotor magnet are at diametrically contraposition; And coil, it is by consisting of across insulating part coiling wire at described tooth;
Molding outer casing, it has: circular bottom wall portion, it is positioned at the axial below of described armature; And hub portion, its central part in described bottom wall portion is given prominence to below axially, and has the wheel hub through hole along central axis, and described molding outer casing holds described armature in inside, and towards axial upper side opening;
The retainer of round-ended cylinder shape is arranged, and it has: cylindrical portion; And the bottom, it has the retainer through hole that inserts for axle in central authorities, and described retainer is supported on described hub portion;
Bearing, it is contained in described retainer, and supports described axle; And
Carriage, it covers the open side of described molding outer casing, and the bearing of back shaft is supported,
The inner peripheral surface of the described wheel hub through hole of the regulation of described molding outer casing has the large-diameter portion that supports described retainer at axial downside,
Described inner peripheral surface in the axial direction side has the minor diameter part less than the external diameter of described retainer,
Described retainer is supported in described minor diameter part with the state that described bottom side becomes upside,
The upper end of the described cylindrical portion of described retainer contacts axial with described minor diameter part,
Described minor diameter part and described axle fixed part be at axial overlap,
Described axle fixed part and the distance between described minor diameter part of described rotor are larger than the axial distance between described rotor magnet and described molding outer casing.
3. motor according to claim 1,
Described rotor has the connecting portion that connects described axle fixed part and described rotor magnet, and the axial length of described axle fixed part is longer than the axial length of described connecting portion.
4. motor according to claim 2,
Described rotor has the connecting portion that connects described axle fixed part and described rotor magnet, and the axial length of described axle fixed part is longer than the axial length of described connecting portion.
5. each described motor in 4 according to claim 1,
Described bottom has annulus section and protuberance,
Described annulus section axially extends towards radially inner side from the end of described rotor magnet side described cylindrical portion,
Described protuberance is from the radially inner side of described annulus section and outstanding to radially inner side away from the position of described cylindrical portion, and the internal diameter of described minor diameter part is larger than the internal diameter of described protuberance.
6. motor according to claim 5,
Described motor has:
Substrate is used in control, and it is configured in the radially inner side of described molding outer casing, and is the ring-type centered by central axis, and this control is axially being disposed opposed to each other with substrate and described rotor magnet;
Leaf spring, it is configured between the described annulus section and described bearing of described retainer; And
Back-up ring, it is from axially being installed on up and down described bearing,
Described control has Magnetic Sensor with substrate at the axial upside of described rotor magnet,
Described Magnetic Sensor and described rotor magnet axially approach.
7. each described motor in 4 according to claim 1,
Described retainer and described molding outer casing and described carriage are one-body molded.
8. each described motor in 4 according to claim 1,
Described retainer fixes with described molding outer casing and described carriage by being pressed into.
9. each described motor in 4 according to claim 1,
A retainer and described carriage in the described retainer are one-body molded,
Another retainer in the described retainer is pressed into and is fixed in described molding outer casing.
10. motor according to claim 6,
Described insulating part has projection,
Described projection endways section has claw,
Described control is fixed in described claw with substrate.
11. each described motor in 4 according to claim 1,
Described molding outer casing is by the molded of resin material moulding.
12. each described motor in 4 according to claim 1,
Described carriage is by the molded of resin material moulding.
13. each described motor in 4 according to claim 1,
Described carriage is made of the resin material identical with described molding outer casing.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-251164 | 2011-11-16 | ||
| JP2011251164 | 2011-11-16 | ||
| JP2012-162154 | 2012-07-21 | ||
| JP2012162154A JP5775853B2 (en) | 2011-11-16 | 2012-07-21 | Molded motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202889059U true CN202889059U (en) | 2013-04-17 |
Family
ID=48080449
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104092893A Pending CN103117619A (en) | 2011-11-16 | 2012-10-24 | Mold motor |
| CN2012205470847U Expired - Fee Related CN202889059U (en) | 2011-11-16 | 2012-10-24 | Molded motor |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104092893A Pending CN103117619A (en) | 2011-11-16 | 2012-10-24 | Mold motor |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR101955729B1 (en) |
| CN (2) | CN103117619A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117619A (en) * | 2011-11-16 | 2013-05-22 | 日本电产高科电机株式会社 | Mold motor |
| CN104836362A (en) * | 2014-02-08 | 2015-08-12 | 日本电产株式会社 | Fan motor |
| EP3062423A4 (en) * | 2013-10-24 | 2017-07-12 | Mitsubishi Electric Corporation | Stator, electric motor, and air conditioner |
| CN109660053A (en) * | 2014-02-12 | 2019-04-19 | 日本电产高科电机株式会社 | Motor |
| CN112217322A (en) * | 2020-01-20 | 2021-01-12 | 江苏鼎智智能控制科技股份有限公司 | Stator module and injection molding stepping motor using same |
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| CN103973043B (en) * | 2013-01-31 | 2018-02-09 | 台达电子工业股份有限公司 | Motor |
| KR101429081B1 (en) * | 2013-07-04 | 2014-08-14 | 계양전기 주식회사 | Motor of rotor position sensing mechanism to use main magnet |
| JP6321374B2 (en) * | 2013-12-26 | 2018-05-09 | 日本電産テクノモータ株式会社 | Inner rotor type motor |
| JPWO2017104431A1 (en) * | 2015-12-15 | 2018-10-04 | 日本電産テクノモータ株式会社 | Molded motor |
| US11251668B2 (en) | 2018-02-09 | 2022-02-15 | Mitsuba Corporation | Brushless motor and method for producing same |
| CN113424413A (en) * | 2019-03-28 | 2021-09-21 | 日本电产株式会社 | Motor |
| WO2020195391A1 (en) * | 2019-03-28 | 2020-10-01 | 日本電産株式会社 | Bearing holder |
| JP2021164222A (en) * | 2020-03-31 | 2021-10-11 | 日本電産株式会社 | motor |
| CN117595559B (en) * | 2024-01-18 | 2024-03-29 | 沈阳电机制造有限公司 | Large-sized high-voltage three-phase synchronous motor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004129418A (en) | 2002-10-03 | 2004-04-22 | Nidec Shibaura Corp | Motor |
| CN101325351A (en) | 2007-06-15 | 2008-12-17 | 日本电产芝浦株式会社 | Coining motor |
| JP5204554B2 (en) | 2008-05-27 | 2013-06-05 | 日本電産テクノモータ株式会社 | motor |
| JP2010110029A (en) | 2008-10-28 | 2010-05-13 | Nidec Shibaura Corp | Mold motor |
| KR101955729B1 (en) * | 2011-11-16 | 2019-03-07 | 니혼 덴산 테크노 모터 가부시키가이샤 | Mold motor |
-
2012
- 2012-10-10 KR KR1020120112441A patent/KR101955729B1/en active IP Right Grant
- 2012-10-24 CN CN2012104092893A patent/CN103117619A/en active Pending
- 2012-10-24 CN CN2012205470847U patent/CN202889059U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117619A (en) * | 2011-11-16 | 2013-05-22 | 日本电产高科电机株式会社 | Mold motor |
| EP3062423A4 (en) * | 2013-10-24 | 2017-07-12 | Mitsubishi Electric Corporation | Stator, electric motor, and air conditioner |
| CN104836362A (en) * | 2014-02-08 | 2015-08-12 | 日本电产株式会社 | Fan motor |
| CN104836362B (en) * | 2014-02-08 | 2017-10-10 | 日本电产株式会社 | Fan motor |
| US9989062B2 (en) | 2014-02-08 | 2018-06-05 | Nidec Corporation | Fan motor lead wire protection member |
| CN109660053A (en) * | 2014-02-12 | 2019-04-19 | 日本电产高科电机株式会社 | Motor |
| CN112217322A (en) * | 2020-01-20 | 2021-01-12 | 江苏鼎智智能控制科技股份有限公司 | Stator module and injection molding stepping motor using same |
| CN112217322B (en) * | 2020-01-20 | 2022-03-01 | 江苏鼎智智能控制科技股份有限公司 | Stator module and injection molding stepping motor using same |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20130054136A (en) | 2013-05-24 |
| KR101955729B1 (en) | 2019-03-07 |
| CN103117619A (en) | 2013-05-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20201024 |
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| CF01 | Termination of patent right due to non-payment of annual fee |