CN108023418A - Motor - Google Patents
Motor Download PDFInfo
- Publication number
- CN108023418A CN108023418A CN201711011801.8A CN201711011801A CN108023418A CN 108023418 A CN108023418 A CN 108023418A CN 201711011801 A CN201711011801 A CN 201711011801A CN 108023418 A CN108023418 A CN 108023418A
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- China
- Prior art keywords
- permanent magnet
- yoke
- outer circumferential
- circumferential side
- magnet
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The present invention relates to a kind of motor.Rotor possesses：Yoke (8)；Axis (11)；Multiple permanent magnets (9), it is configured at the columnar outer circumferential surface of yoke (8)；The outer circumferential side magnet fixed part (23a) of resin-made, the center position of its from outer circumferential side towards the yoke of permanent magnet exert a force permanent magnet；And the inner circumferential side magnet fixed part (23b) of resin-made, it is integrally constituted with outer circumferential side magnet fixed part, and the peripheral direction from the inner circumferential side of permanent magnet towards yoke exerts a force permanent magnet.The area to exert a force towards the peripheral direction of yoke to permanent magnet is more than the area to exert a force towards the center position of yoke to permanent magnet.
Description
Technical field
The present invention relates to motor.
Background technology
In the past, as Patent Document 1, it is known that possess by columnar yoke and the integrally formed rotor formed of permanent magnet
Motor.Hereinafter, the motor is illustrated with reference to Fig. 6.
As shown in fig. 6, conventional motor is configured with the multiple of circular shape in the outer circumferential surface of columnar yoke 101
Permanent magnet 102.Permanent magnet 102 has the circumferential end of the wall ratio permanent magnet 102 of the circumferential central portion of permanent magnet 102
The uneven thickness shape of wall thickness thickness.Resin 103, permanent magnet 102 and yoke 101 are integrally formed.
Resin is there are in the outer circumferential side of the permanent magnet 102 of circular shape, so that rotor outer periphery is formed as positive round, therefore is set
Be placed in rotor outer periphery stator and rotor outer periphery physical-gap it is uniform.In contrast, permanent magnet 102 is in uneven thickness shape,
Therefore the gap of the stator and the outer circumferential surface of permanent magnet 102 that are arranged at rotor outer periphery is uneven.
Thereby, it is possible to be formed such as lower structure：By the way that rotor outer periphery is set to positive round so as to physically stablize and by forever
The magnetic field that magnet 102 is formed has the structure of gentle cyclical swing, the i.e. rotating structure suitable for motor.
Citation
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2001-251818 publications
In this conventional motor, due to the dimensional discrepancy of permanent magnet 102, and make the gap between rotor and stator
Size produce deviation.The deviation of the particularly size in the face of the outer circumferential side of permanent magnet 102 directly affects the deviation in magnetic field, it is tied
The problem of deterioration of vibration noise when fruit is the reduction for the efficiency for producing motor, rotation.Also, as shown in fig. 7, sometimes
The thin slice i.e. burr 104 of resin is produced on 103 periphery of resin that the thinner wall section of permanent magnet is formed about.When the burr 104 is in electricity
When the inside stripping of motivation comes off, there is the problem that the vibration noise of motor deteriorates.
The content of the invention
Problems to be solved by the invention
The present invention solves above-mentioned conventional problem, and its purpose is to provide the cycle for being able to ensure that the magnetic field by rotor generation
Change the motor of generation constant and that burr can be suppressed.
Solutions to solve the problem
Moreover, in order to realize the purpose, motor according to the present invention possesses rotor and is set in the periphery of rotor
Stator, wherein, rotor possesses：Columnar yoke, it is made of ferromagnetic；Axis, it is at the center of the columnar circle of yoke
Penetrated through from the top surface of yoke to the bottom surface of yoke；Multiple permanent magnets, it is configured at the columnar outer circumferential surface of yoke；The outer circumferential side of resin-made
Magnet fixed part, the center position of its from outer circumferential side towards the yoke of permanent magnet exert a force permanent magnet；And the inner circumferential side of resin-made
Magnet fixed part, it is integrally constituted with outer circumferential side magnet fixed part, and from the inner circumferential side of permanent magnet towards the peripheral direction of yoke
Exert a force to permanent magnet.Moreover, the area that exerts a force to permanent magnet of peripheral direction towards yoke is more than the center position towards yoke to forever
The area of magnet force, is achieved in desired purpose.
Invention effect
According to the present invention, it can obtain being able to ensure that the cyclical swing by the magnetic field of rotor generation is constant and can suppress
The effect of the generation of burr.
Brief description of the drawings
Fig. 1 is the sectional view for showing the motor involved by embodiments of the present invention.
Fig. 2 is A-A sectional views when looking up observation of the motor 1 shown in Fig. 1.
Fig. 3 A are to show rotor, the particularly stereogram of yoke and permanent magnet.
Fig. 3 B are the stereograms for the configuration for showing yoke and permanent magnet.
Fig. 4 is the sectional view that the rotor involved by embodiments of the present invention is shown in a manner of biopsy cavity marker devices.
Fig. 5 A are the partial perspective stereograms shown with the rotor of mould cooperation.
Fig. 5 B are the stereograms for showing the rotor involved by embodiments of the present invention.
Fig. 6 is the sectional view for the rotor for showing conventional motor.
Fig. 7 is the stereogram for showing to produce jagged state in conventional rotor.
Description of reference numerals
1 motor；2 stators；3 insulators；4 coilings；5 printed boards；6 molded stators；7 rotors；8、101
Yoke；9th, 102 permanent magnet；9a permanent magnet outer circumferential surface sections；10th, 103 resin；11 axis；12a, 12b bearing；13 brackets；15
Stator core；21 centre bores；23a outer circumferential side magnet fixed parts；23b inner circumferential sides magnet fixed part；25th, 67 is substantially a ring-shaped
Portion；50 central portions；51 ends (both ends)；52 through holes；54 inner peripheral surfaces；62 cylindrical protrusions；63 spaces；64 pour
Mouthful；X, Y, Z mould.
Embodiment
Motor according to the present invention possesses rotor and the stator set in the periphery of rotor, wherein, rotor possesses：
Columnar yoke, it is made of ferromagnetic；Axis, it is penetrated through to the bottom of yoke at the center of the columnar circle of yoke from the top surface of yoke
Face；Multiple permanent magnets, it is configured at the columnar outer circumferential surface of yoke；The outer circumferential side magnet fixed part of resin-made, it is from permanent magnet
Outer circumferential side towards yoke center position to permanent magnet exert a force；And the inner circumferential side magnet fixed part of resin-made, itself and outer circumferential side
Magnet fixed part is integrally constituted, and the peripheral direction from the inner circumferential side of permanent magnet towards yoke exerts a force permanent magnet.Moreover, direction
The area that the peripheral direction of yoke exerts a force permanent magnet is more than the area to exert a force towards the center position of yoke to permanent magnet.
Here, " center position of yoke " refers to the direction of the radially inner side towards yoke." peripheral direction of yoke " refers to direction
The direction of the radial outside of yoke.
As described above, the area to exert a force towards the peripheral direction of yoke is more than the area to exert a force towards the center position of yoke.
Thus, by yoke and permanent magnet it is integrally formed when, permanent magnet is subject to the pressure of the peripheral direction towards yoke.Therefore, though in the presence of
The deviation of the size of permanent magnet, can also eliminate or mitigate rotor outer diameter deviation.Thereby, it is possible to ensure to be given birth to by rotor
Into magnetic field cyclical swing it is constant, therefore can suppress motor efficiency reduce and vibration noise generation.In addition, pass through
Exert a force to outer peripheral side to permanent magnet, the generation of the burr of outer circumferential side can be suppressed.Stripping therefore, it is possible to suppress because of burr comes off
The vibration of caused unexpected motor and the generation of noise.
Alternatively, it is also possible to using such as lower structure：Gap between the inner peripheral surface of permanent magnet and the outer circumferential surface of yoke is towards permanent magnetism
The circumferential both ends of iron and become larger, the gap between the outer circumferential surface of permanent magnet and the inner peripheral surface of stator is constant.
Magnetic field thereby, it is possible to make to be formed by permanent magnet has gentle cyclical swing.Furthermore it is possible to realize towards yoke
The area of peripheral direction force is more than the structure of the area to exert a force towards the center position of yoke.
In addition, permanent magnet can also have the thickness of the peripheral direction of yoke maximum in the circumferential central portion of permanent magnet and court
The uneven thickness shape to diminish to both ends.
Thereby, it is possible to realize such as lower structure：The shape of yoke is held circular at, the magnetic field for making to be formed by permanent magnet has flat
Slow cyclical swing, the area to exert a force towards the peripheral direction of yoke are more than the area to exert a force towards the center position of yoke.
In addition, resin can also use thermoplastic resin.
Thermoplastic resin and BMC (the Bulk Molding Compound with use unsaturated polyester (UP)：Tubular molding compound) etc.
For representative heat-curing resin compared to being not likely to produce burr, and be easily formed as thin-walled.Therefore, it is possible to suppress because of burr
Peel off the vibration of unexpected motor and the generation of noise caused by coming off.
In addition, permanent magnet can also use ferrite sintered magnet.
Ferrite sintered magnet is using iron oxide, barium carbonate, strontium carbonate as primary raw material, by powder metallurgic method and relatively honest and clean
Manufacture valency.Therefore, it is possible to realize that the fee of material of motor is cut down.
Motor according to the present invention possesses rotor and the stator set in the periphery of rotor, wherein, rotor possesses：
Columnar yoke, it is made of ferromagnetic；Axis, it is penetrated through to the bottom of yoke at the center of the columnar circle of yoke from the top surface of yoke
Face；Multiple permanent magnets, it is configured at the columnar outer circumferential surface of yoke；The outer circumferential side magnet fixed part of resin-made, its local complexity
The outer circumferential surface of permanent magnet；And inner circumferential side magnet fixed part, it is integrally constituted with outer circumferential side magnet fixed part, and is present in forever
Gap between the inner peripheral surface of magnet and the outer circumferential surface of yoke.Moreover, permanent magnet with inner circumferential side magnet fixed part with contacting
Side part and the outboard section contacted with outer circumferential side magnet fixed part, the area of inboard portion are more than the face of outboard section
Product.
Cyclical swing thereby, it is possible to ensure the magnetic field by rotor generation is constant, and can suppress the generation of burr.
Hereinafter, the embodiments of the present invention will be described with reference to the drawings.It should be noted that following embodiment is
An example that the present invention is embodied, does not limit the technical scope of the present invention.In addition, in all of the figs, to identical position
Mark identical reference numeral and omit the description.Also, in the drawings, for the detailed of each portion not directly related with the present invention
Details condition omits the description.
(embodiment)
Fig. 1 is the sectional view for showing the motor involved by embodiments of the present invention.Fig. 2 is the motor 1 shown in Fig. 1
The sectional view for looking up observation when being cut off by dotted line A-A.Fig. 3 A are to show rotor, the particularly solid of yoke and permanent magnet
Figure.Fig. 3 B are the stereograms for the configuration for showing yoke and permanent magnet.Fig. 4 is the section view that rotor is shown in a manner of biopsy cavity marker devices
Figure, upper left a quarter are the sectional view of the state before integrally formed by resin, and the latter half is integrally formed by resin
The sectional view of state afterwards, upper right a quarter are the outside drawings of the state after integrally formed by resin.That is, the lower half of Fig. 4
A-A sectional view (but be merely rotor 7) of the part equivalent to Fig. 1.
Hereinafter, the structure of the motor involved by present embodiment is said with reference to Fig. 1, Fig. 2, Fig. 3 A, Fig. 3 B, Fig. 4
It is bright.
Motor 1 is the brushless DC motor of interior transition, is used for example as the driving source of ventilation fan.Motor 1 possesses 7 He of rotor
Stator 2.
Rotor 7 possesses yoke 8, permanent magnet 9, resin 10 and axis 11.
Yoke 8 at center by having multiple disks of through hole, that is, centre bore 21 to form.By making multiple disks overlapping, so that
Form columnar yoke 8.Disk is using the ferromagnetic including iron, cobalt etc. as main material.
In the outer circumferential surface of yoke 8, throughout complete cycle (360 degree) and the more of same shape and identical size are equally spaced
A permanent magnet 9.
The specifically ferrite sintered magnet of permanent magnet 9.As shown in Fig. 2, permanent magnet 9 has the center when looking up observation
The uneven thickness shape of the wall thickness thickness of the end 51 (hereinafter referred to as making " both ends ") of the wall ratio both sides in portion 50, that is, arc-shaped
Shape.In addition, permanent magnet 9 has rectangular shape when side view is observed.Permanent magnet 9 has to fall by carrying out C in whole end face parts
Angle handles or R chamfereds and the chamfered section that is formed.Permanent magnet 9 passes through resin 10 in the state of the outer circumferential surface of yoke 8 is configured at
It is integrally formed with yoke 8.Its detailed content is aftermentioned.It should be noted that show that the outer circumferential surface in yoke 8 is configured with permanent magnetism in figure 3b
The stereogram of the state of iron 9.
Resin 10 is formed between adjacent permanent magnet 9.More specifically, resin 10 is formed in the thinner wall section of permanent magnet 9
I.e. circumferential both ends 51 between the both ends 51 of the adjacent permanent magnet 9 in circumferential both sides.Resin 10 possesses：Outer circumferential side magnet
Fixed part 23a, it exerts a force permanent magnet 9 from outer circumferential side towards the center position of yoke 8；And inner circumferential side magnet fixed part 23b, its
It is integrally constituted with outer circumferential side magnet fixed part 23a, and exerts a force from inner circumferential side towards the peripheral direction of yoke 8 to permanent magnet 9.Periphery
Side magnet fixed part 23a and inner circumferential side magnet fixed part 23b forms the top surface from yoke 8 up to the continuous bar-shaped column in bottom surface.This
A little columns are between the end 51 of adjacent permanent magnet 9, the complete cycle i.e. throughout yoke 8 is equally spaced.Outer circumferential side magnet fixed part
23a connects with the outer circumferential surface of each end 51 of adjacent permanent magnet 9.Inner circumferential side magnet fixed part 23b and adjacent permanent magnet 9
The inner peripheral surface of each end 51 connect.Resin 10 also has top part (substantially a ring-shaped portion 25, with reference to Fig. 5 B) and bottom surface sections are (greatly
Annulus 67 is caused, with reference to Fig. 5 B).Top surfaces of the outer circumferential side magnet fixed part 23a and inner circumferential side magnet fixed part 23b in permanent magnet 9
Side end is connected with the top part (substantially a ring-shaped portion 25) of resin 10, and in the bottom surface side end of permanent magnet 9 and resin 10
Bottom surface sections (substantially a ring-shaped portion 67) connect.It is shown in the upper right a quarter of the top part (substantially a ring-shaped portion 25) in Fig. 4, pass through
Shown in the outside drawing of state after resin is integrally formed.
In the centrally disposed centre bore 21 of yoke 8 axis 11 has been inserted and fixed from the top surface of yoke 8 to bottom surface.That is, axis 11
Penetrated through at the center of the columnar circle of yoke 8 from top surface to bottom surface.
As shown in Figure 1, on axis 11, two bearing 12a, bearings are respectively arranged with the top surface side and bottom surface side of yoke 8
12b。
Bearing 12a, 12b, which are remained, to be rotated using axis 11 as central shaft.
Stator 2 is arranged at the periphery of rotor 7.Stator 2 possess stator core 15, insulator 3, coiling 4, molded stator 6, with
And bracket 13.
Stator core 15 is in hollow circle tube, in columnar wall portion from the top surface of stator core 15 up to stator core 15
Bottom surface there is through hole 52.Through hole 52 is circumferentially, equally spaced set.Insulator 3 is to cover the inner surface of through hole 52
Mode is inserted into from the top surface and bottom surface side of stator core 15.
Insulator 3 is formed by insulating materials, is wound with coiling 4 respectively thereon.
Coiling 4 is connected with printed base plate 5.By making printed base plate 5 be connected with power supply so as to which coiling 4 is energized.Insulator
3rd, coiling 4 and printed base plate 5 are integrally molded shaping by resin, form molded stator 6.
Stator core 15 is configured to, and the rounded inner peripheral surface 54 of hollow circle tube is opposed with the outer circumferential surface of permanent magnet 9.
This, the gap between the outer circumferential surface of permanent magnet 9 and the inner peripheral surface 54 of stator core 15 is constant.It should be noted that here forever
The outer circumferential surface of magnet 9 more specifically refers to permanent magnet outer circumferential surface section 9a (with reference to Fig. 3 A).Permanent magnet outer circumferential surface section 9a is permanent magnetism
The part in addition to chamfered section in the outer circumferential surface of iron 9.Under this configuration status, molded stator is pressed into by using bracket 13
6 top surface side opening portion is simultaneously sealed, and the periphery of two bearings 12a, 12b are fixed on molded stator 6, so that by rotor 7
It can be rotationally fixed to stator 2.
It is the structure of motor 1 above.
Next, with reference to Fig. 1, Fig. 5 A and Fig. 5 B to the manufacturing process of rotor 7, i.e. by resin 10 by yoke 8 and permanent magnetism
The integrally formed process of iron 9 illustrates.Fig. 5 A are the partial perspective stereograms of the rotor coordinated with mould.Need what is illustrated
It is that in fig. 5, the profile being shown in broken lines forms the inner space of mould described later.
First, yoke 8 is configured in the defined position of integrally formed mould X.Mould X is in the cylinder with inner space
Shape.Bottom surfaces of the mould X in inner space has the base portion of the diameter convex form shorter than the diameter of yoke 8.Base portion and mould X
Cylinder axis be configured to coaxially, the bottom surface out of mould X inner space is prominent to top surface direction.
The central part of radial direction of the center for the short transverse that yoke 8 is maintained in mould X by base portion nearby and in mould X.
Yoke 8 is configured to coaxial with base portion.
Next, the outer circumferential surface in yoke 8 equally spaced configures multiple permanent magnets 9.Permanent magnet 9 is in thickness in permanent magnet 9
Circumferential central portion 50 is maximum and towards both ends 51 and the circular shape of uneven thickness shape that diminishes.By the configuration, remove
Permanent magnet outer circumferential surface section 9a beyond chamfered section connects with the inner peripheral surface of the inner space of mould X.In addition, the inner circumferential of permanent magnet 9
Gap between the outer circumferential surface of face and yoke 8 becomes larger towards the both ends 51 of permanent magnet 9.
In addition, cylindrical protrusion 62 is correspondingly provided with each permanent magnet 9 in the periphery of bottom surface, that is, base portion of mould X,
The cylindrical protrusion 62, which remains permanent magnet 9 from the bottom surface of mould X, to be floated.Cylindrical protrusion 62 is with the bottom surface than permanent magnet 9
Small area, which remains permanent magnet 9 from the bottom surface of mould X, slightly to be floated.
Next, after permanent magnet 9 is configured in the complete cycle throughout yoke 8, in the top side configuration mould Y of yoke 8.Mould Y is in make
The base portion of mould X reverses the concave shape formed up and down.That is, the bottom surface of mould Y is diametrically shorter than the diameter of yoke 8 cylindric.
In the state of mould Y is configured with, the bottom surface of yoke 8 connects with the base portion of mould X, the top surface of yoke 8 and the base portion phase of mould Y
Connect.Moreover, yoke 8 is clamped by the base portion of mould X and mould Y.In addition, the top surface side end of mould X and the top surface side of mould Y
End is in the same plane.The plane is located at the top that small space 63 is separated with the top surface side end of permanent magnet 9.
Next, with the planar registration configure mould Z.Mould Z is with hollow-centered disc-shape and in plan view
In the plate of so-called bread loop-shaped.Thus, the inner space of mould X becomes the state closed by mould Y and mould Z.Need
Illustrate, the opening portion for resin by injection, i.e. cast gate 64 are equally spaced configured with the top of mould Z.
In this state, it is pressed into thermoplastic resin, that is, resin from cast gate 64.
By the press-in of thermoplastic resin, resin is first pressed into and fills to the top surface side end with permanent magnet 9 and separates
The top in small space 63, that is, substantially a ring-shaped portion 25.
Afterwards, resin is pressed into and fills to the gap between adjacent permanent magnet 9, i.e. outer circumferential side magnet fixed part 23a
With inner circumferential side magnet fixed part 23b.
The both ends 51 of permanent magnet 9 have chamfered section.Resin is pressed near the chamfered section at both ends 51 of permanent magnet 9,
So as to form outer circumferential side magnet fixed part 23a.Moreover, by the press-in of resin and the outer circumferential side magnet fixed part 23a that is formed from
The center position of outer circumferential side towards yoke 8 applies permanent magnet 9 briquetting pressure, exerts a force.
In addition, resin is pressed into the gap between the inner peripheral surface of permanent magnet 9 and the outer circumferential surface of yoke 8, so as to form inner circumferential side
Magnet fixed part 23b.Moreover, by the press-in of resin and the inner circumferential side magnet fixed part 23b that is formed from inner circumferential side towards yoke 8
Peripheral direction applies permanent magnet 9 briquetting pressure, exerts a force.
At this time, in inner circumferential side magnet fixed part 23b, exert a force from inner circumferential side towards the peripheral direction of yoke 8 to permanent magnet 9
Area (two lines 65 in Fig. 2) be more than outer circumferential side magnet fixed part 23a in, from the center position towards yoke 8 to permanent magnet 9
The area (two lines 66 in Fig. 2) of force.Therefore, permanent magnet 9 is subject to from the outer circumferential side of the centrally directed permanent magnet 9 of yoke 8
Pressure.
Thus, in the case that deviation occurs for the size of permanent magnet 9, which is also inhaled in the inner side of permanent magnet 9
Receive.In other words, there is permanent magnet 9 in the outer circumferential surface proper alignment of rotor 7.Thus, relative to the stable magnetic field of stator 2.Stator 2 with
Gap, that is, gap between rotor 7 is very small compared with the diameter of rotor 7.Understand that the small gap can be to the rotation of motor
Turn to cause big influence.In the present embodiment, it is opposed with the gap to make by the force of inner circumferential side magnet fixed part 23b
9 proper alignment of permanent magnet.Thus generate well-regulated magnetic field and stablize the cyclical swing in the magnetic field of the generation of rotor 7.Accordingly, it is capable to
Enough suppress the efficiency reduction and the generation of vibration noise of motor.
In addition, by exerting a force to outer peripheral side to permanent magnet 9, the generation of the burr of outer circumferential side can be suppressed.Therefore, it is possible to press down
Burr processed is peeled off in the inside of motor to come off, and motor 1 is produced unexpected vibration, the situation of noise.
In addition, the gap between the outer circumferential surface of permanent magnet 9 and the inner peripheral surface 54 of stator core 15 is constant.Permanent magnet 9 it is interior
Gap between the outer circumferential surface of side face and yoke 8 becomes larger towards the both ends 51 of permanent magnet 9.Thus, the magnetic formed by permanent magnet 9
Field has gentle cyclical swing.Furthermore it is possible to make it is in the magnet fixed part 23b of inner circumferential side, from inner circumferential side towards the periphery of yoke 8
The area that direction exerts a force permanent magnet 9 be more than it is in outer circumferential side magnet fixed part 23a, exert a force to permanent magnet 9 towards center position
Area.Also, permanent magnet 9 is in circumferential central portion 50 maximum and direction two of the thickness in permanent magnet 9 of the peripheral direction of yoke 8
End 51 and the uneven thickness shape to diminish.Thereby, it is possible to realize such as lower structure：The shape of yoke 8 is held circular at, is made by forever
The magnetic field that magnet 9 is formed has gentle cyclical swing, and the area to exert a force towards the peripheral direction of yoke 8 is more than towards in yoke 8
The area of heart direction force.
When continuing resin after resin is full of outer circumferential side magnet fixed part 23a and inner circumferential side magnet fixed part 23b
During press-in, resin is filled to the bottom surface of mould X i.e. around base portion.By resin solidification in this condition, so as to be formed
It is configured to the bottom surface sections (substantially a ring-shaped portion 67) of the bottom surface side end of permanent magnet 9, outer circumferential side magnet fixed part 23a, inner circumferential side magnetic
Ferropexy portion 23b and be configured to permanent magnet 9 top surface side end top part (substantially a ring-shaped portion 25) connection state.By
This, permanent magnet 9 is also held and stablizes by resin 10 in the up-down direction.
It should be noted that the injection of resin is carried out at the same time, so that outer circumferential side magnet fixed part 23a consolidates with inner circumferential side magnet
Determine portion 23b to be integrally constituted.Therefore, permanent magnet 9 is subject to from outer circumferential side magnet fixed part 23a and inner circumferential side magnet fixed part 23b
Unit area pressure it is also identical.
The stereogram of the rotor 7 of state after being pulled down by above-mentioned step manufacture and by mould is shown in figure 5b.Remove
Permanent magnet outer circumferential surface section 9a beyond chamfered section is by the force of inner circumferential side magnet fixed part 23b, and proper alignment is in rotor 7
Outer circumferential surface forms positive round, and due to force so that burr will not be produced.
Industrial applicability
Motor according to the present invention can suppress efficiency reduction, the generation of vibration noise, the generation of burr, such as can
Enough it is applied to the drive motor of ventilation fan etc..
Claims (5)
1. a kind of motor, possesses rotor and the stator set in the periphery of the rotor, wherein,
The rotor possesses：
Columnar yoke, it is made of ferromagnetic；
Axis, it is penetrated through to the bottom surface of the yoke in the top surface of center from the yoke of the columnar circle of the yoke；
Multiple permanent magnets, it is configured at the columnar outer circumferential surface of the yoke；
The outer circumferential side magnet fixed part of resin-made, its center position from the outer circumferential side of the permanent magnet towards the yoke is to described
Permanent magnet exerts a force；And
The inner circumferential side magnet fixed part of resin-made, it is integrally constituted with the outer circumferential side magnet fixed part, and from the permanent magnetism
The peripheral direction of the inner circumferential side of iron towards the yoke exerts a force the permanent magnet,
The area to exert a force towards the peripheral direction of the yoke to the permanent magnet is more than the center position towards the yoke to described
The area of permanent magnet force.
2. motor according to claim 1, wherein,
Gap between the outer circumferential surface of the inner peripheral surface of the permanent magnet and the yoke is towards the circumferential both ends of the permanent magnet
And become larger, the gap between the inner peripheral surface of the outer circumferential surface of the permanent magnet and the stator is constant.
3. motor according to claim 2, wherein,
The permanent magnet has the thickness of the peripheral direction of the yoke maximum in the circumferential central portion of the permanent magnet and direction
The circumferential both ends of the permanent magnet and the uneven thickness shape to diminish.
4. motor according to claim 1, wherein,
The resin is thermoplastic resin.
5. motor according to claim 1, wherein,
The permanent magnet is ferrite sintered magnet.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-212421 | 2016-10-31 | ||
| JP2016212421A JP2018074765A (en) | 2016-10-31 | 2016-10-31 | Electric motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108023418A true CN108023418A (en) | 2018-05-11 |
Family
ID=62080285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711011801.8A Pending CN108023418A (en) | 2016-10-31 | 2017-10-25 | Motor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2018074765A (en) |
| CN (1) | CN108023418A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2023144919A1 (en) * | 2022-01-26 | 2023-08-03 |
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| JPH0284032A (en) * | 1988-04-25 | 1990-03-26 | Matsushita Electric Works Ltd | Permanent magnet rotor |
| JPH0374151A (en) * | 1989-08-10 | 1991-03-28 | Aichi Emerson Electric Co Ltd | Permanent magnet type rotor |
| CN105322678A (en) * | 2014-08-01 | 2016-02-10 | 广东美芝制冷设备有限公司 | Compressor and drive motor therefor, and processing method for drive motor |
| CN205160237U (en) * | 2015-11-25 | 2016-04-13 | 东莞市力辉马达有限公司 | Rotor for an electric motor |
| CN105811625A (en) * | 2016-03-23 | 2016-07-27 | 泰信电机(苏州)有限公司 | High-efficiency rotor for motor |
-
2016
- 2016-10-31 JP JP2016212421A patent/JP2018074765A/en active Pending
-
2017
- 2017-10-25 CN CN201711011801.8A patent/CN108023418A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0284032A (en) * | 1988-04-25 | 1990-03-26 | Matsushita Electric Works Ltd | Permanent magnet rotor |
| JPH0374151A (en) * | 1989-08-10 | 1991-03-28 | Aichi Emerson Electric Co Ltd | Permanent magnet type rotor |
| CN105322678A (en) * | 2014-08-01 | 2016-02-10 | 广东美芝制冷设备有限公司 | Compressor and drive motor therefor, and processing method for drive motor |
| CN205160237U (en) * | 2015-11-25 | 2016-04-13 | 东莞市力辉马达有限公司 | Rotor for an electric motor |
| CN105811625A (en) * | 2016-03-23 | 2016-07-27 | 泰信电机(苏州)有限公司 | High-efficiency rotor for motor |
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| JP2018074765A (en) | 2018-05-10 |
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