CN1841883B - Rotor for motor and motor - Google Patents
Rotor for motor and motor Download PDFInfo
- Publication number
- CN1841883B CN1841883B CN2006100733690A CN200610073369A CN1841883B CN 1841883 B CN1841883 B CN 1841883B CN 2006100733690 A CN2006100733690 A CN 2006100733690A CN 200610073369 A CN200610073369 A CN 200610073369A CN 1841883 B CN1841883 B CN 1841883B
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- 239000011347 resin Substances 0.000 claims abstract description 105
- 229920005989 resin Polymers 0.000 claims abstract description 105
- 230000002093 peripheral effect Effects 0.000 claims description 51
- 238000012423 maintenance Methods 0.000 claims description 3
- 230000002265 prevention Effects 0.000 abstract 1
- 230000007123 defense Effects 0.000 description 13
- 230000001351 cycling effect Effects 0.000 description 12
- 230000000694 effects Effects 0.000 description 5
- 230000003321 amplification Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 229920001707 polybutylene terephthalate Polymers 0.000 description 4
- 229920006324 polyoxymethylene Polymers 0.000 description 4
- 229910001172 neodymium magnet Inorganic materials 0.000 description 3
- 229910052761 rare earth metal Inorganic materials 0.000 description 3
- 150000002910 rare earth metals Chemical class 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 229930182556 Polyacetal Natural products 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- -1 polybutylene terephthalate Polymers 0.000 description 2
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 description 2
- 230000017105 transposition Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
This invention provides a rotor for a motor and a motor that can improve durability and motor characteristics even when a cylindrical magnet and a resin are integrally formed. In the motor, projections 24 for the prevention of slip are formed on one side end surface 21 of the rotor 20. These projections 24 bite into a resin portion 30. This structure prevents the cylindrical magnet 20 from rotating against the resin portion 30, even if a small gap between the resin potion 30 and the inside circumferential surface 28 of the cylindrical magnet 20 is caused by the shrinkage of the resin portion 30 when a heat cycle test or the like is performed.
Description
(1) technical field
The present invention relates to a kind of rotator for motor and have the motor of this rotator for motor.
(2) background technology
Dispose in the motor of cylinder-shaped magnet in rotor-side, use the inner peripheral surface of cylinder-shaped magnet and in the outer peripheral face any to expose and sometimes by cylinder-shaped magnet and the integrally formed rotor (rotator for motor) of resin, in this motor, the side face that exposes a side with the cylinder-shaped magnet of rotor relatively disposes stator (for example with reference to patent documentation 1).
Adopt this structure, then can partly constitute pinion and embed the cylindrical bearing part that fulcrum is arranged by resin.But, when using rare earth magnet such as neodymium magnet as cylinder-shaped magnet, because the material price of magnet is high, so in order to realize the cost degradation of motor, and shown in Fig. 5 (a) and (b), preferably make cylinder-shaped magnet 20 slimmings as far as possible.In the rotator for motor 10 that so constitutes, resin part 30 covers a side end face 21 of cylinder-shaped magnets 20 and opposite side end face 22 and integrated with cylinder-shaped magnet 20.
Patent documentation 1: No. 3558311 communique of Japanese Patent Laid
But, shown in Fig. 5 (a) and (b), when making cylinder-shaped magnet 20 slimmings, prevent that the power that cylinder-shaped magnet 20 relative resin parts 30 were upwards rotated in week from only being the bonding force of resin part 30 and cylinder-shaped magnet 20, so when carrying out temperature cycling test etc., as the dotted line LL among Fig. 5 (a), resin part 30 is shunk, meeting produces little clearance G between the inner peripheral surface 28 of the barrel 25 of resin part 30 and cylinder-shaped magnet 20, cause cylinder-shaped magnet 20 relative resin parts 30 rotations.In addition, when making cylinder-shaped magnet 20 slimmings, be difficult in form on the inner peripheral surface of cylinder-shaped magnet 20 concavo-convex etc., consequently, when the motor that has used the rotator for motor 10 shown in Fig. 5 (a) and (b) is carried out temperature cycling test, shown in the dotted line L2 among Fig. 3, there are vibratory output increase of rotator for motor 10 etc., problem that durability is low.Moreover, consider the vibratory output of rotator for motor 10, need between cylinder-shaped magnet 20 and stator, guarantee big gap, so there is the low problem of motor characteristic.
(3) summary of the invention
In view of the above problems, even technical problem to be solved by this invention provides and a kind ofly cylinder-shaped magnet and the integrally formed occasion of resin also can improved the rotator for motor of durability and motor characteristic and having the motor of this rotator for motor.
In order to address the above problem, rotator for motor of the present invention, by cylinder-shaped magnet with resin is integrally formed constitutes, and the inner peripheral surface of this cylinder-shaped magnet and any in the outer peripheral face are exposed, it is characterized in that, described resin covers at least a portion to side end face on the axis direction of described cylinder-shaped magnet and opposite side end face both sides on the axis direction, be formed with the dislocation that prevents described resin part and the dislocation of described cylinder-shaped magnet and prevent portion on a described side end face of described cylinder-shaped magnet and in the described opposite side end face at least one, this dislocation portion of preventing is by outstanding on axis direction and embed protuberance in the described resin, and be recessed at axis direction and embed at least one formation in the recess of described resin.
In rotator for motor of the present invention, on side end face of axis direction and opposite side end face, be formed with the dislocation that constitutes by protuberance or recess and prevent that the cylinder-shaped magnet of portion and resin are integrally formed, when the dislocation portion of preventing is protuberance, protuberance is in the state in the embedded resin, when the dislocation portion of preventing was recess, recess had been embedded in resin.Therefore, when cylinder-shaped magnet being carried out temperature cycling test etc., even resin partly shrinks, produce little gap between the side face of resin part and cylinder-shaped magnet, cylinder-shaped magnet is resin partial rotation relatively not also.Therefore, can prevent the vibratory output increase of the rotator for motor that temperature cycling test causes etc., the durability height.In addition, because the vibratory output of rotator for motor is little, so need between cylinder-shaped magnet and stator, not guarantee to improve motor characteristic in big gap.Moreover, because be protuberance outstanding on axis direction or the recess that is recessed at axis direction, even also can easily form for the cylinder-shaped magnet of slimming.
In the present invention, best described dislocation prevents portion by constituting to the outstanding a plurality of protuberances of axis direction at circumferential a plurality of positions, and described resin buries described protuberance each other.Because it is a plurality of that the dislocation portion of preventing is formed with, so can play big anti-idle running effect.In addition, because will bury between the protuberance,, can not produce useless air drag so, the end face of rotator for motor upwards can be formed smooth face in week even form protuberance at the end face of cylinder-shaped magnet with resin yet.
At this moment, the gauge of best described protuberance on radial direction is than the thin thickness of the barrel of described cylinder-shaped magnet, and described protuberance is on the thickness direction of described cylinder-shaped magnet, is formed on the position of the inner peripheral surface of the described cylinder-shaped magnet of deflection and the side opposite with exposing side in the outer peripheral face.Adopt this structure, then also can prevent cylinder-shaped magnet relative resin partial transposition on radial direction.In addition, be preferably in the side of exposing in the inner peripheral surface of cylinder-shaped magnet and the outer peripheral face, resin does not cover the side face of cylinder-shaped magnet, form the form of resin from this side face depression, adopt the occasion of this form, because protuberance is thin and be formed on secund position, so even when covering protuberance fully with resin, the shape that is formed with the zone of protuberance also can form the shape same with other zones.Therefore,, also the end face of rotator for motor upwards can be formed smooth face in week, can not produce useless air drag even form protuberance at the end face of cylinder-shaped magnet.
In the present invention, can adopt described dislocation to prevent that portion is by the structure that constitutes, imbeds described resin at circumferential a plurality of positions to the recessed a plurality of recesses of axis direction in this recess.When so constituting,, also the end face of rotator for motor upwards can be formed smooth face in week, can not produce useless air drag even form recess at the end face of cylinder-shaped magnet.
At this moment, the inner bottom surface of best described recess forms the conical surface that tilts at radial direction, and the inclined-plane exposes side in the inner peripheral surface of described cylinder-shaped magnet and outer peripheral face.Adopt this structure, then also can prevent cylinder-shaped magnet relative resin partial transposition on radial direction.In addition, be preferably in the side of exposing in the inner peripheral surface of cylinder-shaped magnet and the outer peripheral face, resin does not cover the side face of cylinder-shaped magnet, form the form of resin from this side face depression, adopt the occasion of this form, in the zone that does not form recess, divide by the end face of cylinder-shaped magnet and resin portion to form step.On the other hand, form step in the zone that is formed with recess by the resin portion branch, but this moment, because the inner bottom surface of recess forms the conical surface, thereby, also can divide to form the step same with other zones by resin portion even when burying in the recess fully with resin, thereby, even the end face at cylinder-shaped magnet forms recess, also the end face of rotator for motor upwards can be formed smooth face in week, can not produce useless air drag.
In addition, expose side in the inner peripheral surface of cylinder-shaped magnet and outer peripheral face, compare with its opposition side, the A/F of recess narrows down, at this moment, can with act on and stator between magnetic force distribute and unbalanced situation takes place suppress very for a short time.In addition, the advantage that also has the resin protuberance that can prevent to be filled in the recess.
Motor with rotator for motor of the present invention, in described rotator for motor, the side face that exposes a side with described cylinder-shaped magnet relatively disposes stator.Therefore, need between cylinder-shaped magnet and stator, not guarantee to improve motor characteristic in big gap, and can realize the miniaturization of motor.
In addition, best described motor comprises: the motor part with described rotator for motor and described stator; And the train of reduction gears that is used to transmit the revolving force of described rotator for motor.Moreover, best described rotator for motor rotatably is supported on the fulcrum, and described resin has: for interior all side cylindrical portion of described fulcrum embedding, the outer circumferential side cylindrical portion of the described cylinder-shaped magnet of maintenance and the connecting portion of described interior all side cylindrical portion and described outer circumferential side cylindrical portion.In having the motor of this structure, because need between cylinder-shaped magnet and stator, not guarantee big gap, thus can improve motor characteristic, and can realize the miniaturization of motor.
The invention effect:
In rotator for motor of the present invention and motor, being formed with the dislocation that is made of protuberance or recess on side end face of axis direction and opposite side end face prevents that the cylinder-shaped magnet of portion and resin are integrally formed and constitutes rotator for motor, when the dislocation portion of preventing is protuberance, protuberance is in the state in the embedded resin, when the dislocation portion of preventing was recess, recess had been embedded in resin.Therefore, when cylinder-shaped magnet being carried out temperature cycling test etc., even resin partly shrinks, when producing little gap between the side face of resin part and cylinder-shaped magnet, cylinder-shaped magnet is resin partial rotation relatively not also.Therefore, can prevent the vibratory output increase of the rotator for motor that temperature cycling test causes etc., the durability height.In addition, because the vibratory output of rotator for motor is little, so need between cylinder-shaped magnet and stator, not guarantee to improve motor characteristic in big gap.Moreover, because be protuberance outstanding on axis direction or the recess that is recessed at axis direction, even also can easily form for the cylinder-shaped magnet of slimming.
(4) description of drawings
Fig. 1 is a key diagram of using band gear motor of the present invention.
Fig. 2 (a) and (b), (c) be respectively the rotator for motor of the invention process form 1 cutaway view, represent the upper part of the cylinder-shaped magnet that uses in this rotator for motor stereogram, be formed on the migrate amplification stereogram of protuberance of air defense on the upper part of cylinder-shaped magnet.
Fig. 3 is illustrated in the chart that the vibratory output of rotor when motor carried out temperature cycling test changes.
Fig. 4 (a) and (b), (c) be respectively the rotator for motor of the invention process form 2 cutaway view, represent the upper part of the cylinder-shaped magnet that uses in this rotator for motor stereogram, be formed on the migrate amplification plan view of recess of air defense on the upper part of cylinder-shaped magnet.
Fig. 5 (a) and (b) be respectively the rotator for motor of comparative example cutaway view, represent the stereogram of the upper part of the cylinder-shaped magnet that uses in this rotator for motor.
(symbol description)
1 band gear motor 10 rotors (rotator for motor)
One side end face of 20 cylinder-shaped magnets, 21 cylinder-shaped magnets
Opposite side end face 24 protuberances (dislocation prevents portion) of 22 cylinder-shaped magnets
The outer peripheral face of 26 recesses (dislocation prevents portion), 27 cylinder-shaped magnets
The inner peripheral surface 30 resin parts of 28 cylinder-shaped magnets
301,302 stators, 303 stator pack
(5) embodiment
Describe being used to implement preferable form of the present invention with reference to the accompanying drawings.
Example 1:
Fig. 1 is a key diagram of using band gear motor of the present invention.Fig. 2 (a) and (b), (c) be respectively the rotator for motor of the invention process form 1 cutaway view, represent the upper part of the cylinder-shaped magnet that uses in this rotator for motor stereogram, be formed on the migrate amplification stereogram of protuberance of air defense on the upper part of cylinder-shaped magnet.Fig. 3 is illustrated in the chart that the vibratory output of rotor when motor carried out temperature cycling test changes.
Band gear motor 1 shown in Figure 1 is used to drive the adjuster (damper) etc. of shutter, water heater and refrigerator etc. of the air outlet of air conditioner, has motor part 3 and train of reduction gears 4 in motor field frame 2.Train of reduction gears 4 is used to transmit the revolving force of rotor 10, only illustrates primary pinion 401 and final stage gear 402 in the train of reduction gears 4 in Fig. 1.Motor part 3 has the stepping motor structure, comprising: the stator 301,302 of ring-type is along axis direction 2 grades of stator pack 303 that ground is stacked up and down; And be configured in its inboard rotor 10 (rotator for motor).Rotor 10 rotatably is supported on the fulcrum 205, and this fulcrum 205 is supported by a pair of up and down supporting bracket 201,203 of motor field frame 2, disposes spring 207 between rotor 10 and supporting bracket 201, and this spring 207 is used for rotor 10 application of force upward.
In the band gear motor 1 of this form, shown in Fig. 2 (a), the outer peripheral face 27 of the cylinder-shaped magnet 20 that is made of rare earth magnets such as neodymium magnet, samarium cobalt magnets of rotor 10 exposes, rotor 10 by cylinder-shaped magnet 20 and POM (polyacetal resin), PBT (polybutylene terephthalate resin), PA resins such as (polyamide/nylon resins) is integrally formed and constitute, in rotor 10, the outer peripheral face 27 that exposes with cylinder-shaped magnet 20 relatively disposes stator pack shown in Figure 1 303 (stator 301,302).In rotor 10, constitute the connecting portion 33 of the interior all side cylindrical portion 31 (bearing portion), pinion 34, the outer circumferential side cylindrical portion 32 that keeps cylinder-shaped magnet 20 and interior all side cylindrical portion 31 and the outer circumferential side cylindrical portion 32 that embed for fulcrum shown in Figure 1 205 by resin part 30.In addition, the outer circumferential side cylindrical portion 32 of resin part 30 cover cylinder-shaped magnets 20 on axis direction a side end face 21 and the part of opposite side end face 22.
Shown in Fig. 2 (a) and (b), (c), in cylinder-shaped magnet 20, be formed with the air defense protuberance 24 (dislocation prevents portion) of migrating on the side end face 21 in one side end face 21 and the opposite side end face 22, this air defense protuberance 24 of migrating is outstanding on axis direction, and in the embedded resin part 30.In this form, on the opposite side end face 22 of cylinder-shaped magnet 20, do not form the air defense protuberance of migrating.
At this, protuberance 24 sees from radial direction and is trapezoidal shape, and in when overlooking, being the limit of all sides than the trapezoidal shape of the length of side of outer circumferential side.Therefore, though protuberance 24 thin intensity are big.In addition, when axis direction is seen protuberance 24, the shape of its leading section 241 be the size that makes progress in interior all side weeks long, at the short trapezoidal shape of the size that makes progress in outer circumferential side week.
In this form, on a side end face 21 of cylinder-shaped magnet 20, protuberance 24 is formed on 3 positions that are positioned at circumferential first-class angle intervals, and resin part 30 covers the leading section 241 of 3 protuberances 24.In addition, the part between 3 protuberances 24 is imbedded in the resin part 30.Therefore, though form protuberance 24 on a side end face 21 of cylinder-shaped magnet 20, on the side end face 11 on this protuberance 24 causes the concavo-convex axis direction that can not be reflected in rotor 10, the side end face 11 on the axis direction of rotor 10 upwards is smooth in week.
At this, resin part 30 is seen as the form of depression from outer peripheral face 27, does not cover the outer peripheral face that exposes 27 of cylinder-shaped magnet 20.Therefore, on side end face 11 of rotor 10 and opposite side end face 12, form circular step 13,14 by resin part 30 and cylinder-shaped magnet 20.On the other hand, the gauge t1 of protuberance 24 on radial direction be than the thin thickness of the barrel 25 of cylinder-shaped magnet 20, and with simplified 25 inner peripheral surface on one side.That is, protuberance 24 is formed on the position of deflection inner peripheral surface 28 of cylinder-shaped magnet 20 and the inner peripheral surface 28 in the outer peripheral face 27 (side opposite with the outer peripheral face that exposes 27) on the thickness direction of cylinder-shaped magnet 20.Therefore, even when covering protuberance 24, also can form and the regional same circular step 13,14 that does not form protuberance 24 by resin part 30.Therefore, even on a side end face 21 of cylinder-shaped magnet 20, form protuberance 24, also the side end face 11 on the axis direction of rotor 10 upwards can be formed smooth face in week.
(the main effect of this form)
Like this, in the band gear motor 1 of this form, rotor 10 forms the air defense protuberance 24 of migrating on a side end face 21 of cylinder-shaped magnet 20, and these protuberances 24 are in the state in the embedded resin part 30.Therefore, when carrying out temperature cycling test etc., even resin part 30 shrink, when between the inner peripheral surface 28 of resin part 30 and cylinder-shaped magnet 20, producing little gap, cylinder-shaped magnet 20 also not relatively resin part 30 rotate.Therefore, the result who carries out temperature cycling test is shown in the solid line L1 among Fig. 3, to increase because can prevent the vibratory output of rotor 10, so the durability height.In addition, because the vibratory output of rotor 10 is little,, can improve motor characteristic so need between cylinder-shaped magnet 20 and stator pack 303, not guarantee big gap.Moreover, because be protuberance 24 outstanding on axis direction, even also can easily add for the cylinder-shaped magnet 20 of slimming.
In addition, in this form, the air defense protuberance 24 of migrating is formed on a plurality of positions that make progress in week, so play very big effect to preventing to dally.
Moreover, the gauge t1 of protuberance 24 on radial direction is than the thin thickness of the barrel 25 of cylinder-shaped magnet 20, and be formed on the position of deflection inner peripheral surface 28 sides (side opposite) with the outer peripheral face that exposes 27, so even when covering protuberances 24 with resin part 30, the regional both sides that form the zone of protuberance 24 and do not form protuberance 24 can form same circular step 13,14.Therefore,, also the side end face 11 on the axis direction of rotor 10 upwards can be formed smooth face in week, can not produce useless air drag even on a side end face 21 of cylinder-shaped magnet 20, form protuberance 24.And, because protuberance 24 is covered by resin part 30, so can prevent that also cylinder-shaped magnet 20 from misplacing on radial direction.
Moreover when axis direction is seen protuberance 24, the shape of its leading section 241 is long, short in the size that makes progress in outer circumferential side week in the size that makes progress in interior all side weeks, becomes the inclined plane so be positioned at the both sides end face that makes progress in week.Therefore, even owing to the thermal expansion of resin part 30, produce the gap between cylinder-shaped magnet 20 and resin part 30, cylinder-shaped magnet 20 also can be to the dislocation of the radial direction outside.
Moreover, the leading section 241 of protuberance 24 also can form from the inclined plane of interior all side direction outer circumferential side inclinations, adopt the occasion of this structure, when covering protuberances 24 with resin part 30, the regional both sides that form the zone of protuberance 24 and do not form protuberance 24 also can form same circular step 13,14.Therefore,, also the side end face 11 on the axis direction of rotor 10 upwards can be formed smooth face in week, can not produce useless air drag even on a side end face 21 of cylinder-shaped magnet 20, form protuberance 24.In addition, when forming from inclined plane that interior all side direction outer circumferential side tilts, the leading section 241 with protuberance 24 also can play following effect: even because the thermal expansion of resin part 30, produce the gap between cylinder-shaped magnet 20 and resin part 30, cylinder-shaped magnet 20 can be to the dislocation of the radial direction outside yet.
Example 2:
Fig. 4 (a) and (b), (c) be respectively the rotator for motor of the invention process form 2 cutaway view, represent the upper part of the cylinder-shaped magnet that uses in this rotator for motor stereogram, be formed on the migrate amplification plan view of recess of air defense on the upper part of cylinder-shaped magnet.Moreover, because the basic structure of rotator for motor of this form and motor is identical with example 1, so identical part mark prosign omits its explanation.
Shown in Fig. 4 (a) and (b), the rotor 10 of this form is identical with example 1, the outer peripheral face 27 of the cylinder-shaped magnet 20 that is made of rare earth magnets such as neodymium magnet, samarium cobalt magnets of rotor 10 exposes, rotor 10 by cylinder-shaped magnet 20 and POM (polyacetal resin), PBT (polybutylene terephthalate resin), PA resins such as (polyamide/nylon resins) is integrally formed and constitute, in rotor 10, the outer peripheral face 27 that exposes with cylinder-shaped magnet 20 relatively disposes stator pack shown in Figure 1 303 (stator 301,302).In rotor 10, constitute the connecting portion 33 of the interior all side cylindrical portion 31 (bearing portion), pinion 34, the outer circumferential side cylindrical portion 32 that keeps cylinder-shaped magnet 20 and interior all side cylindrical portion 31 and the outer circumferential side cylindrical portion 32 that embed for fulcrum shown in Figure 1 205 by resin part 30.In addition, the outer circumferential side cylindrical portion 32 of resin part 30 cover cylinder-shaped magnets 20 on axis direction a side end face 21 and the part of opposite side end face 22.
In this form, on side end face 21 of cylinder-shaped magnet 20 and the side end face 21 in the opposite side end face 22, be formed with the air defense recess 26 (dislocation prevents portion) of migrating, migrate recess 26 of this air defense is recessed at axis direction, and resin part 30 embeds wherein.In this form, on the opposite side end face 22 of cylinder-shaped magnet 20, do not form the air defense recess of migrating.
In this form, recess 26 is formed on 3 positions that are positioned at circumferential first-class angle intervals, and resin part 30 covers 3 recesses 26 fully.Therefore, though form recess 26 on a side end face 21 of cylinder-shaped magnet 20, on the side end face 11 on this recess 26 causes the concavo-convex axis direction that can not be reflected in rotor 10, the side end face 11 on the axis direction of rotor 10 upwards is smooth in week.
At this, resin part 30 is seen as the form of depression from outer peripheral face 27, does not cover the outer peripheral face that exposes 27 of cylinder-shaped magnet 20.Therefore, on a side end face 11 and opposite side end face 12 of rotor 10, form circular step 13,14 by resin part 30 and cylinder-shaped magnet 20 in the zone that does not form recess 26.On the other hand, the inner bottom surface 261 of recess 26 forms the conical surface that tilts at radial direction, and the inclined-plane exposes outer peripheral face 27 in the inner peripheral surface 28 of cylinder-shaped magnet 20 and outer peripheral face 27.Therefore, even when burying the inside of recess 26 fully, also can form the step 15 same by resin part 30 with the circular step 13 in the zone that does not form recess 26 in the zone that is formed with recess 26 with resin part 30.Therefore, even on a side end face 21 of cylinder-shaped magnet 20, form recess 26, also the side end face 11 on the axis direction of rotor 10 upwards can be formed smooth face in week.
In addition, see recess 26 from axis direction, its shape shown in Fig. 4 (c), be the size that makes progress in interior all side weeks long, at the short roughly trapezoidal shape of the size that makes progress in outer circumferential side week.Therefore, in the inside of recess 26, be positioned at circumferential sidewall and form the conical surface.
Like this, in the band gear motor 1 of this form, rotor 10 forms the air defense recess 26 of migrating on a side end face 21 of cylinder-shaped magnet 20, and the inside of these recesses 26 is in the state that resin part 30 is arranged that embeds.Therefore, when carrying out temperature cycling test etc., even resin part 30 is shunk, when producing little gap between the inner peripheral surface 28 of resin part 30 and cylinder-shaped magnet 20, cylinder-shaped magnet 20 also not relatively resin part 30 rotate.Therefore, the result who carries out temperature cycling test is, and is identical with example 1, increases because can prevent the vibratory output of rotor 10, so the durability height.In addition, because the vibratory output of rotor 10 is little,, can improve motor characteristic so need between cylinder-shaped magnet 20 and stator pack 303, not guarantee big gap.Moreover, because be the recess 26 that is recessed at axis direction, even also can easily add for the cylinder-shaped magnet 20 of slimming.
In addition, the inner bottom surface 261 of recess 26 forms the conical surface that tilts at radial direction, and the inclined-plane exposes outer peripheral face 27 in the inner peripheral surface 28 of cylinder-shaped magnet 20 and outer peripheral face 27, therefore, even when burying the inside of recess 26 fully, also can form the step 15 same in the zone that is formed with recess 26 with the circular step 13 in the zone that does not form recess 26 with resin part 30.Therefore,, also the end face of rotor 10 upwards can be formed smooth face in week, can not produce useless air drag even on a side end face 21 of cylinder-shaped magnet 20, form recess 26.In addition, because the inner bottom surface 261 of recess 26 forms the conical surface, so can prevent that also cylinder-shaped magnet 20 from misplacing on radial direction.
At this, if the circumferential size of recess 26 is too short, then when inlaying shaping, be easy to occur the state that resin can not bury recess 26 fully, on the other hand, if the circumferential size of recess 26 is oversize, then act on magnetic field (magnetic force) between cylinder-shaped magnet 20 and the stator pack 303 be distributed with may produce unbalanced.In this form, when axis direction is seen recess 26, its shape is shown in Fig. 4 (c), be the size that makes progress in interior all side weeks long, at the short roughly trapezoidal shape of the size that makes progress in outer circumferential side week, therefore, resin can bury recess 26 reliably, and can suppress the magnetic force skewness weighing apparatus that acts between cylinder-shaped magnet 20 and the stator pack 303 very little.In addition, because be that in interior all sides, resin part 30 covers the inner bottom surface 261 of recess 26 in a wide range, so can prevent the dislocation of cylinder-shaped magnet 20 reliably at the long recess 26 of the size that makes progress in interior all side weeks.Moreover, because be, be filled to the advantage that the resins in the recess 26 are difficult to swell on axis direction so also have in the size length that makes progress in interior all side weeks, at the recess 26 of the short roughly trapezoidal shape of the size that makes progress in outer circumferential side week.
Other examples:
All be that example describes in the above-mentioned form, but the present invention is also applicable to outer-rotor type with the inner-rotor type.At this moment, in cylinder-shaped magnet 20, relative with stator is inner peripheral surface 28.That is, in cylinder-shaped magnet 20, what expose from resin part 30 is inner peripheral surface 28.Therefore, in the rotor or motor of outer-rotor type, formation position or the conical surface of recess inner bottom surface of protuberance on thickness direction got final product towards exchanging at interior all sides and outer circumferential side.
In addition, in above-mentioned form, the quantity of protuberance 24 and recess 26 is 3, but its quantity is not defined as 3.In addition, for a cylinder-shaped magnet 20, also can form protuberance 24 and recess 26 both sides.In addition,, be not defined as on the side end face 21 that is formed on cylinder-shaped magnet 20, can be formed on the opposite side end face 22 or both sides' end face 21,22 of cylinder-shaped magnet 20 yet for protuberance 24 and recess 26.
Claims (9)
1. rotator for motor, by cylinder-shaped magnet with resin is integrally formed constitutes, and the inner peripheral surface of this cylinder-shaped magnet and any in the outer peripheral face expose, it is characterized in that,
Described resin covers at least a portion to side end face on the axis direction of described cylinder-shaped magnet and opposite side end face both sides on the axis direction,
On a described side end face of described cylinder-shaped magnet and in the described opposite side end face at least one, be formed with the dislocation that prevents described resin part and the dislocation of described cylinder-shaped magnet and prevent portion, this dislocation portion of preventing is formed with on axis direction outstanding and embeds protuberance in the described resin
Described dislocation prevents portion by constituting to the outstanding a plurality of protuberances of axis direction at circumferential a plurality of positions, and described resin buries described protuberance each other,
The gauge of described protuberance on radial direction is than the thin thickness of the barrel of described cylinder-shaped magnet, and described protuberance is on the thickness direction of described cylinder-shaped magnet, be formed on the position of deflection inner peripheral surface of described cylinder-shaped magnet and the side opposite in the outer peripheral face with exposing side
When axis direction was seen described protuberance, the shape of its leading section was long, short in the size that is making progress in outer circumferential side week in the size that makes progress in interior all side weeks.
2. a motor has the described rotator for motor of claim 1, it is characterized in that, in described rotator for motor, the side face that exposes a side with described cylinder-shaped magnet relatively disposes stator.
3. motor as claimed in claim 2 is characterized in that, described motor comprises: the motor part with described rotator for motor and described stator; And the train of reduction gears that is used to transmit the revolving force of described rotator for motor.
4. motor as claimed in claim 3, it is characterized in that, described rotator for motor rotatably is supported on the fulcrum, and described resin has: for interior all side cylindrical portion of described fulcrum embedding, the outer circumferential side cylindrical portion of the described cylinder-shaped magnet of maintenance and the connecting portion of described interior all side cylindrical portion and described outer circumferential side cylindrical portion.
5. rotator for motor, by cylinder-shaped magnet with resin is integrally formed constitutes, and the inner peripheral surface of this cylinder-shaped magnet and any in the outer peripheral face expose, it is characterized in that,
Described resin covers at least a portion to side end face on the axis direction of described cylinder-shaped magnet and opposite side end face both sides on the axis direction,
On a described side end face of described cylinder-shaped magnet and in the described opposite side end face at least one, be formed with the dislocation that prevents described resin part and the dislocation of described cylinder-shaped magnet and prevent portion, this dislocation portion of preventing is formed with at axis direction and is recessed on and the recess of the described resin embedding of confession
Described dislocation prevents that portion from by constituting to the recessed a plurality of recesses of axis direction at circumferential a plurality of positions, having imbedded described resin in this recess,
The inner bottom surface of described recess forms the conical surface that tilts at radial direction, and the inclined-plane exposes side in the inner peripheral surface of described cylinder-shaped magnet and outer peripheral face.
6. rotator for motor as claimed in claim 5 is characterized in that, when axis direction was seen described recess, described recess was long, short in the size that is making progress in outer circumferential side week in the size that makes progress in interior all side weeks.
7. a motor has the described rotator for motor of claim 5, it is characterized in that, in described rotator for motor, the side face that exposes a side with described cylinder-shaped magnet relatively disposes stator.
8. motor as claimed in claim 7 is characterized in that, described motor comprises: the motor part with described rotator for motor and described stator; And the train of reduction gears that is used to transmit the revolving force of described rotator for motor.
9. motor as claimed in claim 8, it is characterized in that, described rotator for motor rotatably is supported on the fulcrum, and described resin has: for interior all side cylindrical portion of described fulcrum embedding, the outer circumferential side cylindrical portion of the described cylinder-shaped magnet of maintenance and the connecting portion of described interior all side cylindrical portion and described outer circumferential side cylindrical portion.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005-104033 | 2005-03-31 | ||
| JP2005104033A JP4589786B2 (en) | 2005-03-31 | 2005-03-31 | Motor rotor and motor |
| JP2005104033 | 2005-03-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1841883A CN1841883A (en) | 2006-10-04 |
| CN1841883B true CN1841883B (en) | 2010-08-18 |
Family
ID=37030766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100733690A Expired - Fee Related CN1841883B (en) | 2005-03-31 | 2006-03-31 | Rotor for motor and motor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4589786B2 (en) |
| CN (1) | CN1841883B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5303191B2 (en) * | 2008-06-02 | 2013-10-02 | 日本電産サンキョー株式会社 | Motor device and manufacturing method thereof |
| JP2010246238A (en) * | 2009-04-03 | 2010-10-28 | Nidec Sankyo Corp | Motor device and method for manufacturing the same |
| WO2011135930A1 (en) * | 2010-04-30 | 2011-11-03 | 並木精密宝石株式会社 | Cylindrical coreless motor |
| JP5264859B2 (en) * | 2010-10-24 | 2013-08-14 | 三菱電機株式会社 | Rotor of motor for pump, pump, air conditioner, floor heating device and hot water supply device |
| JP5554272B2 (en) * | 2011-03-18 | 2014-07-23 | 三菱電機株式会社 | Magnet mounted rotor |
| JP6562801B2 (en) * | 2015-09-30 | 2019-08-21 | 日本電産サンキョー株式会社 | Motor device and head-up display |
| CN106863829B (en) * | 2017-02-17 | 2019-03-05 | 宁波精成电机有限公司 | The ultrasonic wave of vehicle glass lifting motor melts flower pattern and its manufacturing method, vehicle glass lifting motor |
| CN108768105A (en) * | 2018-06-11 | 2018-11-06 | 成都银河磁体股份有限公司 | A kind of rotor assembly manufacturing process |
| GB2575300B (en) * | 2018-07-05 | 2022-11-09 | Johnson Electric Int Ag | Rotor assembly for electric motor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4841190A (en) * | 1987-05-01 | 1989-06-20 | Minebea Co., Ltd. | Resin-filled permanent-magnet stepping motor |
| US5373208A (en) * | 1992-07-29 | 1994-12-13 | Kabushiki Kaisha Sankyo Seiko Seisakusho | DC motor with anti-vibration brush mounts |
| JP3558311B2 (en) * | 1995-10-06 | 2004-08-25 | 株式会社三協精機製作所 | Small motor with gear |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5985074U (en) * | 1982-11-26 | 1984-06-08 | 富士電気化学株式会社 | Resin molded rotor |
| JPS60192676U (en) * | 1984-05-30 | 1985-12-21 | 富士電気化学株式会社 | Resin molded rotor |
| JPH0636380U (en) * | 1992-05-28 | 1994-05-13 | 富士電気化学株式会社 | Stepper motor rotor |
| JP2000232743A (en) * | 1999-02-12 | 2000-08-22 | Mitsubishi Electric Corp | Motor |
| JP3736403B2 (en) * | 2001-09-18 | 2006-01-18 | 株式会社デンソー | Step motor and its magnet rotor |
-
2005
- 2005-03-31 JP JP2005104033A patent/JP4589786B2/en not_active Expired - Fee Related
-
2006
- 2006-03-31 CN CN2006100733690A patent/CN1841883B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4841190A (en) * | 1987-05-01 | 1989-06-20 | Minebea Co., Ltd. | Resin-filled permanent-magnet stepping motor |
| US5373208A (en) * | 1992-07-29 | 1994-12-13 | Kabushiki Kaisha Sankyo Seiko Seisakusho | DC motor with anti-vibration brush mounts |
| JP3558311B2 (en) * | 1995-10-06 | 2004-08-25 | 株式会社三協精機製作所 | Small motor with gear |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2006288069A (en) | 2006-10-19 |
| JP4589786B2 (en) | 2010-12-01 |
| CN1841883A (en) | 2006-10-04 |
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