CN1151627A - Small motor - Google Patents
Small motor Download PDFInfo
- Publication number
- CN1151627A CN1151627A CN96110076A CN96110076A CN1151627A CN 1151627 A CN1151627 A CN 1151627A CN 96110076 A CN96110076 A CN 96110076A CN 96110076 A CN96110076 A CN 96110076A CN 1151627 A CN1151627 A CN 1151627A
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- mentioned
- magnetic
- magnetic pole
- pole piece
- stator
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- 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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- 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
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
Abstract
The invention relates to a small type motor, which comprises a stator and a rotor. The stator has a plurality of magnetic pole parts and a coil for the magnetization for the magnetic pole parts, the wire winding work of a stator coil can be easily achieved, and the wire winding work of the stator coil can be finished in a short time, and the stator of the small type motor has a plurality of magnetic pole pieces of the plurality of magnetic pole parts. The magnetic pole pieces are separately arranged according to the stator axial direction and the gap of the winding. The winding of the magnetization magnetic pole part is put in the clearance, and the magnetic pole parts which are separated by the magnetic pole pieces along the axial direction are mutually magnetized into opposite poles.
Description
The present invention relates to a kind of miniature motor, relate to a kind of like this miniature motor in more detail: stem for stem a plurality of magnetic pole pieces on the circumferencial direction that with the axis stator is the center are magnetized into the N utmost point or the S utmost point by giving coil electricity, by the magnetic pole piece after these magnetization and with above-mentioned axis is that the magnetic action of the rotor magnetic pole of configuration is freely rotated at the center, produces torque on this rotor.
In the prior art, as shown in figure 11, stator in this miniature motor comprises: a plurality of pole pieces 82 and the coil that lays respectively at the root 82 of each pole piece 82 that have magnetic pole piece 83 respectively, it is the radial of center that these a plurality of pole pieces 82 are configured to axis stator 81, and it is on the circumferencial direction at center that each magnetic pole piece 83 is located at above-mentioned axis 81 side by side.The magnetic flux that this stator can be produced by coil 84 by flow through electric current in each coil 84 is magnetized into the N utmost point or the S utmost point to each magnetic pole piece 83, to carry out the driving of rotor.
There is not ringshaped magnet on the rotor body in existing band flabellum rotor.This ringshaped magnet is formed by magnetic material and passes through sintering and forms ring bodies, in the many places on the circumferencial direction of this ring bodies, applies strong magnetic flux from separately the outside and magnetizes, and thus, forms above-mentioned magnetic pole piece.Like this, at above-mentioned magnetic pole piece place, carried out hard magnetization in the part of its outer circumferential side.On rotor body, used this magnet, and in order to give full play to the ability of this magnet, as shown in Figure 9, in the outside of this magnet 73 configuration ring-type yoke portion 72, thereby the mutual magnetic resistance of the part that makes the outer circumferential side after the above-mentioned hard magnetization reduces continuously, and do not have a generation of leakage field.Then this rotor body and the fan combination that disposes a plurality of air-supply flabellums on every side are integral and constitute the rotor of band flabellum.
But, the stator of the miniature motor of said structure, in it is made during coiling 8, must be wrapped on the position of the such small and exquisite of so-called pole piece root 82a, therefore the lead of coil must pass adjacent with it another very near pole piece 82 and magnetic pole piece 8 thereof and avoid them and carry out coiling, then has the very problem of difficulty of winding operation.
And all must carry out the operation of this difficulty and have the problem of taking time and energy very much each pole piece 82.
On the rotor body of above-mentioned existing miniature motor, need big equipment to carry out the magnetization of ringshaped magnet.
In order to give full play to the ability of magnet, also need the yoke portion 72 of above-mentioned this another purposes.
Owing to need magnet and yoke portion, part management will relate to the two, with regard to the management time that needs cost to carry out.
The application's miniature motor is exactly in order to solve above-mentioned prior art problems.
The purpose of this invention is to provide a kind of stator, can drive with the rotation that can be used in rotor by a plurality of magnetic pole pieces being magnetized into the N utmost point or the S utmost point to coil electricity.
Another object of the present invention is to carry out the coil-winding operation of stator under the state that can open wide around, to seek the simplification of this winding operation.
Another purpose is by with a coil above-mentioned a plurality of magnetic pole pieces being magnetized into the N utmost point or the S utmost point, only just to be enough to finish the coil-winding operation of stator in making in less man-hour of the winding operation of this coil.
Another purpose is just to be enough to be configured for the equipment that rotor body magnetizes with simple material, and just can finish the manufacturing of rotor body with less time.
Another purpose is, for basis material arbitrarily, and only with an incorporate manufacturing of finishing rotor less man-hour of magnet, and, simplified and be used for the part management that rotor body is made.
Another purpose is to form above-mentioned basis material and magnet and can obtain cheap supply with any cheap material.
Just can easily understand other purpose and advantage by accompanying drawing and with relevant following explanation.
To achieve these goals, miniature motor of the present invention comprises rotor body 37, has the space 38 that is used to settle stator S in the inboard; Be configured in stator said stator S in this inner space and be included in and have magnetic pole piece 17 on the circumferential position respectively, a plurality of pole pieces 15 of 18,16 and be used for to above-mentioned pole piece 15,16 provide the coil 30 of the magnetization magnetic flux of magnetic pole piece, it is characterized in that, above-mentioned pole piece 15,16, on the axis direction of said stator S, separate the clearance G 1 that is used for positioned coil, and be configured at projection finding and each pole piece 15 from above-mentioned direction of principal axis, 16 magnetic pole piece 17,18 is the different state in position of circumferentially going up at center with above-mentioned axis, and above-mentioned coil 30 is configured to make the pole piece 15 that separates on above-mentioned axis direction in above-mentioned clearance G 1,16 magnetic pole piece 17,18 are magnetized into heteropole mutually.
Miniature motor of the present invention, comprise rotor body 37, has the space 38 that is used to settle stator S in the inboard, with the stator S that is configured in this inner space, it is characterized in that, above-mentioned rotor body 37 comprises that the magnet 37 that forms hollow and annular by the moulding material that possesses magnetic values has in interior all sides of this magnet 37 and is used for a plurality of magnetic pole pieces 44 of magnetic flux being provided for respectively above-mentioned space, have these magnetic pole pieces at outer circumferential side and carry out the magnetic circuit portion 46 that magnetic connects mutually, each magnetic pole piece 44 of above-mentioned interior all sides is magnetized into the magnetic flux density that is higher than each outer circumferential side part.
Miniature motor of the present invention, comprise rotor body 37, the inboard has the space that is used to settle stator S, with the stator S that is configured in this inner space, it is characterized in that, above-mentioned rotor body 37 comprises a plurality of magnetic pole pieces 44 of being used for respectively magnetic flux being provided for above-mentioned space and these magnetic pole pieces is carried out the magnetic circuit portion 46 that magnetic is connected mutually, on above-mentioned rotor body 37, around it, have a plurality of air-supply flabellums 42, above-mentioned rotor body 37 and a plurality of air-supply flabellum 42 form by the moulding material that possesses magnetic property is whole, and the magnetic flux density of all sides was higher than each all side part in above-mentioned each magnetic pole piece 44 was magnetized into and makes.
The rotor body manufacture method of miniature motor of the present invention, it is characterized in that, be used to make the internal mold 59 of rotor body 37 moulding of the miniature motor that has the space of settling stator S in the inboard to have to be used for around it many places to form the magnetic pole 62 that magnetizes of each magnetic pole piece respectively, the moulding material of certain state of the flowability that the same bond material that is used for combining with it of powdery hard ferrite material is mixed in the placed around of above-mentioned internal mold 59, thereby under this laying state, make the part that this moulding material solidifies at the magnetic pole 62 that magnetizes that faces toward above-mentioned rotor body 37 form magnetic pole piece 44.
Accompanying drawing to expression the application embodiments of the invention describes below.
Fig. 1 is the longitudinal section of electric fan;
Fig. 2 is the front view of stator;
Fig. 3 is the decomposition diagram of stator and rotor;
Fig. 4 is the front view of the rotor of band flabellum;
Fig. 5 is the longitudinal section of finishing die of the rotor of expression band flabellum;
Fig. 6 is the VI-VI line sectional view among Fig. 5;
Fig. 7 is the perspective view of the different examples of expression pole piece;
Fig. 8 is the end view of the pole piece of Fig. 7;
Fig. 9 is the decomposition diagram of the different examples of expression rotor;
Figure 10 is the decomposition diagram of another different example of expression rotor;
Figure 11 is the half sectional view of the existing stator of expression.
In the drawings, S is a stator, and 14 is axis stator, and 15,16 is pole piece, and 17,18 is magnetic pole piece, and G1 is the gap that is used to place coil, the 30th, and coil.
Fig. 1 expresses electric fan as an example that utilizes the device of miniature motor.This electric fan be used for carrying out the coolant exhaust in the shell of electronic installation or give electronic installation indivedual electronic units air-supplies so that small-sized (for example below several watts) electric fan of its cooling in this electric fan, M is a miniature motor, and F is by this electric motor driven fan.(ホ-Le モ-) has been known to motor M, and B is a frame, and S is a stator, is drive circuit, and R is a rotor as the Hall motor.Respectively they are described below.
Frame B is the pedestal that is used for each parts of supporting motor M, and it is constituted by the baseplate part 1 that is used to install drive circuit C and stator S with by surrounding the surrounding wall portion 2 that forms style around the one side.This frame B for example synthetic resin material makes, but also can be metal.3,4 respectively expression be used for the fixing bearing and the stator of drive circuit, represent ventilation window.On the surrounding wall portion 26 is to be used for this electric fan is installed to installation portion on the use location, has the through hole 7 of interspersed construction bolt.
Drive circuit C is known as for example its structure of drive circuit of Hall motor, is made up of circuit board 10 and each circuit element 11 mounted thereto.In this circuit element 11, comprise the Hall element that is used to control rotor rotation state (phase place of rotation).The 12nd, be connected the power supply lead-in wire on the circuit 10, the 13rd, be used for the connector that links to each other with power circuit.And in the electric fan shown in this example, foregoing circuit plate 10 is for being used for the substrate of mechanical support said stator S and rotor R.
Stator S is used for providing the magnetic flux that rotates usefulness, its structure such as Fig. 2, shown in Figure 3 to rotor R.The axis of 14 expression stators concerns that as each position component in the stator straight line of benchmark supposes.15,16 is respectively pole piece, is used to form the magnetic pole of stator, is made of magnetic material.As magnetic material, can be little and material such as silicon steel sheet that magnetic flux density is high of coercive force, but on the good starting point of economy, also can constitute with for example steel disc.The width W 1 of pole piece 15,16 and thickness T 1 be confirmed as can be under undersaturated state the magnetic flux by being used for providing to magnetic pole piece.Length 11 is preferably: the gap that makes stator pole piece and rotor magnetic pole department is narrow as much as possible so that arrive the latter efficiently from the former magnetic flux, its result has improved the efficient of miniature motor, thereby forms this length 11 under the scope that does not touch rotor as wide as possible.Above-mentioned pole piece 15,16 is configured to separate the clearance G 1 that is used to lay coil on the direction of above-mentioned axis 14.17,18 representatives set magnetic pole piece on each pole piece 15,16 is to apply and become the part of magnetic pole of the stator respectively by the magnetic flux of giving pole piece 15,16.These magnetic pole pieces 17,18 be configured to from above-mentioned axis 14 direction projection findings be with above-mentioned axis 14 center circumferentially on the different state in position so that can provide rotary driving force by the interaction in magnetic field for rotor.Above-mentioned magnetic pole piece 17,18 is made of thin sheet metal, and is such as shown in the figure, is bent to form on the direction parallel with axis 14, so that make the area facing to surperficial 17a, the 18a of rotor become big.The area of above-mentioned surperficial 17a, 18a should be big as much as possible in effective range, so that magnetic flux is provided and makes rotor produce big revolving force for rotor efficient (magnetic resistance is low).For example, under the situation that width W 2 is represented for the angle at center in order to rotating shaft 14, each utmost point of cutting apart to stator is 360 ° to the maximum, is 90 ° degree under the stator situation of four utmost points of for example this example.And length L 2 can the scope planted agent relative with the aftermentioned magnetic pole piece 44 of rotor form as far as possible longways.19,20 expressions are located at the through hole on each pole piece 15,1 in order to carry out combination with following bonded block.
23 representatives are used for bonded block that above-mentioned two pole pieces 15,16 mechanically are combined into one.24,25 respectively expression be used to install the installation portion of above-mentioned pole piece 15,16, the part of expressing is in order to fasten the peritreme of above-mentioned through hole 19,20.The gap L 3 of these installation portions 24,25 form with the measure-alike size of the needs in this gap to be kept for placing the clearance G 1 of above-mentioned coil.The 26th, the part as being used for stator S is installed to the installation sheet on the predetermined holding member (being foregoing circuit plate 10 in this example) has bonded block 23 1 sides drying.The microcapsules that obtain are carried out the vitamin content analysis, and as shown in Figure 3: the reservation amount of all vitamins is very high.Comparative Examples B
Be similar to embodiment 3 described steps, difference is that heating made protein denaturation in 15 minutes to component with 95 ℃ temperature, but polybag is carried out HIGH PRESSURE TREATMENT.As shown in Figure 3: 4 kinds reservation amount is starkly lower than the vitamin reservation amount that embodiment 3 mesohighs are handled sample in 5 kinds of vitamin.15, the magnetic link of 16 mutual magnetic connections.And, forming above-mentioned link 23 with magnetic material so that it becomes under the situation of magnetic link, then this rotating shaft 39 can be made in order to avoid produce magnetic attraction with this link 23 with nonmagnetic substance.The 40th, prevent the locating snap ring of deviating from.The 41st, be used to connect the flange part of rotor body 37 and rotating shaft 39.And an example of the size of above-mentioned rotor body 37 is that diameter D1 is that 17mm, thickness T 2 are the degree of 2mm.In addition, above-mentioned diameter D1 is the degree of 10mm～10cm, and the size of required magnetic flux density is determined above-mentioned thickness T 2 on its size and magnetic pole piece described later.
Come the magnetic texure of the rotor body 37 of above-mentioned rotor R is described according to Fig. 4 below.Rotor body 37 has the magnetic properties as magnet, and use-case moulding material as described later forms, and has magnetic texure described as follows.44N, 44S are illustrated in the existing magnetic pole piece of interior perimembranous of rotor body 37.These magnetic pole pieces 44N, 44S are used for making respectively magnetic flux to arrive the magnetic pole piece in space 38, behind the label with alphabetical N and the S polarity of representing the N utmost point or the S utmost point.These magnetic pole pieces 44N, 44S are under the state of orientation in the hard ferrite material production magnetic field that makes in the moulding material, are magnetized into magnetic flux density 500～1600 Gausses (this magnetic flux density is difference by desired magnetic properties on the rotor R) for example that are higher than each outer circumferential side part 44.Above-mentioned so-called state of orientation is exactly that the direction of easy axis separately of most powdery hard ferrite materials is arranged in the state of certain orientation with magnetic field with this direction, promptly sends the state of magnetic flux with this direction.And the state of the parts of being fixed under this state is called the hard ferrite shape.Arrow 45 expression from above-mentioned each magnetic pole piece 44N come out to enter the space 38 magnetic flux and from the space 38 magnetic fluxs that enter each magnetic pole piece 44S.Though expressed the width W 4 of above-mentioned magnetic pole piece 44N, 44S have with axis 36 be the center near 90 ° size, it exists and determines or narrower situation according to desired revolving property in the rotor and definite.
46 representatives are used to make the mutual magnetic of above-mentioned magnetic pole piece 44N, 44S to connect in the magnetic circuit portions of above-mentioned rotor body 37 inner existence.In formed rotor body 37 by moulding material with above-mentioned magnetic properties, this magnetic circuit portion 46 comprise above-mentioned outer circumferential side part 44 ', the part outside above-mentioned magnetic pole piece 44N, the 44S all is this magnetic circuit portion.Magnetic circuit portion 46 is in the state that most powdery hard ferrite materials do not have to be orientated in the above-mentioned moulding material, and its magnetic flux density is lower than magnetic pole piece 44N, 44S.Above-mentioned what is called do not have the state of orientation be exactly the direction of easy axis of most powdery hard ferrite materials be random, if the state that magnetic flux arrives and then this magnetic flux in statu quo passed through from other places.And the state of the parts of being fixed under this state is called the soft ferrite state, and arrow 47 is illustrated in the magnetic flux that passes through magnetic circuit portion 46 between magnetic pole piece 44N, the 44S.
Fan F has a plurality of air-supply flabellums 42 that are located at around the above-mentioned rotor body 37.
The following describes the manufacturing of said stator S.Pole piece 15,16 forms shape shown in Figure 3 to above-mentioned magnetic material by for example decompressor.And make coupling component 23 and coil 30 respectively by other operation.When making coil 30, can carry out its winding operation separately, be easy.That is, under miscellaneous part state at all events, can on bobbin 31, wind the line, and can easily finish with for example coil winding machine etc.The assembling of stator S is carried out like that by following.Coil 30 install to coupling component 23 around.Both sides from its both sides axis 14 directions) add upper pole piece 15,16 respectively, the through hole 19,20 of each pole piece 15,1 is riveted on each installation portion 24,25.Finished the manufacturing of stator S thus.
The assembling of above-mentioned electric fan is such, and stator S is installed on the circuit board 10.Installation sheet 26 was inserted the through hole that is located on the circuit board 10, installation sheet 26 was fixed on the circuit board 10 by riveting set.Also can carry out said fixing with mechanical devices such as jockey or bolt.Lead-in wire 34 is connected on the predetermined position of circuit board 10.The rotor R of prefabricated band flabellum is installed then.The through hole 27 of bearing was inserted in rotating shaft 39, loaded onto locating snap ring 4 to realize slip-off preventing.The axis 14 of stator S and the axis 36 of rotor R are coincided.Utilize bearing 3 and stator 4 that foregoing circuit plate 10 is installed on the frame B then.Connector 13 is installed on the lead-in wire 12.Finish the assembling of electric fan thus.
For the small electric fan of said structure, the direct current of providing work to use for drive circuit C by connector 13.So coil 30 energisings of giving stator S then this coil 30 produce magnetic fluxs, this magnetic flux offers magnetic pole piece 17,18 by pole piece 15,16, and then magnetic pole piece 1718 is magnetized to for example the N utmost point and the S utmost point respectively.By the respective action of the magnetic pole piece 17,18 after this magnetization with the magnetic field of magnetic pole piece 44N, the 44S of rotor R, apply torque for rotor body 37, rotor R is rotated.And, along with the rotation of rotor R, give the sense of current of coil 30 reverse by making from drive circuit C, conversion then takes place in the polarity of magnetic pole piece 17,18, thereby is continuously applied torque towards fixed-direction to rotor R, and then rotor R continues rotation with fixed-direction.By the rotation of above-mentioned rotor R,, and blow towards cooled object by the wind of a plurality of air-supply flabellums 42 generations as arrow 42a.In these cases, connect owing to carry out magnetic by magnetic circuit portion 46 between magnetic pole piece 44N, the 44S, then low magnetic resistance ground passes through magnetic flux 47 between magnetic pole piece 44N, 44S.Like this, the ability that makes magnetic pole piece 44N, the 44S ground magnetic flux 45 that balances each other is provided for said stator S by above-mentioned magnetic pole piece 44N, 44S, the strain of above-mentioned torque phase is big.
Manufacturing to above-mentioned rotor R describes below.Fig. 5, shown in Figure 6 50 is shaping moulds of rotor R, by can close up mutually and disclosed a pair of mould for example patrix 51 and counterdie 52 are constituted.53 expressions are used to make the molding space at the global formation of 51,52 formed above-mentioned rotor R of two moulds.Patrix 51 is made up of major part 54,55, is provided with the cast gate 56 and the path 57 thereof that are used to make the moulding material inflow.Above-mentioned major part 54 by nonmagnetic substance for example non-magnetic steel form, apply magnetic influence with the rotor R of exempt from customs examination institute's moulding in above-mentioned molding space 53.
Counterdie 52 is made up of critical piece 58～61.In these critical pieces, critical piece 59 is the internal molds that are used to form above-mentioned space 53, is provided with the permanent magnet 62 of the usefulness that magnetizes in this critical piece 59.Critical piece 58～60 by nonmagnetic substance for example the rotor R that forms with exempt from customs examination institute's moulding in above-mentioned molding space 53 of non-magnetic steel apply magnetic influence.Above-mentioned permanent magnet 62 is used for the magnetic flux that position that interior perimembranous many places 63 to the molding space 67 of above-mentioned molding space 53 internal rotor bodies 37 promptly form above-mentioned magnetic pole piece 44N, 44S is provided for forming these magnetic pole pieces, and its peripheral part 62a is the magnetic pole of usefulness of magnetizing.For the magnetic pole piece 44N of above-mentioned preset width W, the formation of 44S, the width W of the magnetic pole 62a of the usefulness that magnetizes 5 is determined according to width W.The strong magnetic flux that magnetizes that is used for magnetic pole piece 44N, 44S arrives above-mentioned position 63, outer circumferential side at these positions 63 partly is just to have only in above-mentioned outer circumferential side part 44 ' formed part and other parts than above-mentioned position 63 weak magnetic fluxs to arrive, then these parts just become magnetic circuit portion 46, can arrange above-mentioned permanent magnet 62 and critical piece 59 like this.In permanent magnet 62, give magnetizing of above-mentioned magnetic pole piece 44N, 44S, use the intensity of this degree of magnetic flux that the bottom line needs are provided, for example, the magnetic flux density of the magnetic pole 62a of the usefulness that magnetizes is 5000 Gausses' a degree.For critical piece 59, make in the face of the thickness T 3 of the part 59a of magnetic pole 62a for the required thin as far as possible thickness of protection magnet 62 1mm for example, so that the magnetic flux of magnetic pole 62a only reaches above-mentioned position 63 efficiently.And, the 64th, the maintaining part of rotating shaft 39, the 65th, jemmy.
Be an example of the moulding program of rotor R below.Preparation has the moulding material of magnetic properties.Wherein so-called magnetic properties is exactly can be by the character that produces orientation that applies of magnetic flux.Above-mentioned moulding material with the hard ferrite material of powdery as material with above-mentioned magnetic properties, and hybrid junctions condensation material therein.For example use iron oxide as the hard ferrite material.In addition also can use ferro-aluminum nickel cobalt permanent magnetism to close rare earths such as universal class, samarium one cobalt class, neodymium one iron boron class.Binding material is to be used for material that the hard ferrite material of above-mentioned powdery is linked and solidifies, thereby uses the material with character of solid when being melted in cooling when heating.For example can use nylon-6.In addition also can use synthetic resin such as PA-12, nylon-66, polyvinyl chloride, polyethylene, polypropylene, Merlon, PBT, PET, ABS, AS resin.Above-mentioned hard ferrite is that for example the former is the degree of 90 weight % with the blending ratio of binding material, and the latter is the degree of 10 weight %.Also can use other ratios.Above-mentioned moulding material is processed into the proterties that matches with forming method.For example be processed into the graininess that is suitable for the ejaculation type.
Above-mentioned hard ferrite material is flowed in the molding space 53 of above-mentioned shaping mould 50 under flow regime with the moulding material under the binding material admixture.For example, above-mentioned granular material is dropped in the Jet forming machine, melt binding material by heating (for example 200～350 ℃) above-mentioned moulding material moulding material is under certain mobile state, it is mapped in the molding space 53 by cast gate 56, path 57 from Jet forming machine.Penetrate pressure and be for example 0.5～1 ton/cm of pressure known in the ejection forming technique
2And, much less, should remain on rotating shaft 39 in the maintaining part 64 in advance.
Under certain state of flowability, flow into above-mentioned molding space 53 by the above-mentioned moulding material that makes like this, be arranged in the moulding material of internal mold 59 molding space 67 on every side, in the high part 63 of the density of the magnetic flux that the magnetic pole 62a by the usefulness that magnetizes is provided, make the direction of easy axis of most hard ferrite materials of above-mentioned powdery be oriented to the direction of this magnetic flux by this magnetic flux.In other parts, for non-oriented state is that the direction of easy axis of hard ferrite material is the state of chaotic.By cooling curing moulding material in this state, above-mentioned part 63 becomes the hard ferrite state because of solidified above-mentioned hard ferrite material under state of orientation, and it becomes magnetic pole piece 44N, 44S.And other parts are to solidify under non-state of orientation, and become the soft ferrite state, and it becomes magnetic circuit portion 46.On the other hand, in molding space 68,69, make flange part 41 and air-supply flabellum 42 respectively by above-mentioned moulding material.After if above-mentioned moulding material solidifies, patrix 51 and counterdie 52 are broken away from, make the rotor R demoulding after the moulding by jemmy 65.Finish the operations for forming of rotor R thus.
The following describes a kind of different embodiment.Above-mentioned pole piece 15,16 can by the mold forming identical with the moulding of above-mentioned rotor R for example ejection formation form and have the moulding material (for example soft ferrite material) of removing magnetized character when magnetic flux is removed in apply magnetic flux time magnetization.In the case, above-mentioned thickness T 1 can be for 2～3mm so that can be by the magnetic flux of required q.s.Above-mentioned moulding material forms the host of for example magnetic powder with being used for mixing in conjunction with this host and the adhesive that is cured.Use Fe-Ni alloy, iron-nickel-cobalt alloy, iron-nickel-silicon alloy, iron-aluminium-silicon alloys, iron/copper-silicon alloy etc. as host.And the composition in above-mentioned each alloy beyond the deironing is that a few percent is with interior trace.Use nylon-6, PA-12 or poly-phenylene sulfite etc. as above-mentioned adhesive.The blending ratio of above-mentioned host and adhesive is for example the former 9 weight %, the latter 10 weight %.
Another embodiment to the configuration of the pole piece in the stator describes below.Above-mentioned pole piece is every severally to be separated out on the motor stator axis direction that coil is placed the gap of usefulness and from above-mentioned axis direction projectively, the magnetic pole piece of each pole piece be configured to above-mentioned axis be the center circumferentially on the different state in position.For example, per two pole pieces are configured in a side and the opposite side of coil respectively, it is that the center whenever differs 45 ° position difference that the magnetic pole piece of these pole pieces is configured to make with the axis stator.In this case, because of forming the magnetic pole piece of 8 utmost points altogether, then be the stator of 8 utmost points.
Fig. 7, figure to another different embodiment of the pole piece of expression in the stator describes below.This two figure is illustrated in to be separated out on the axis stator direction and places the mutually combine different examples of form of a plurality of pole pieces that the gap disposed that coil uses, and by forming the integrality that a plurality of pole pieces are combined mutually in advance, realizes the purpose that is easy to make.In the drawings, pole piece 15e, 16e and bonded block 23e are magnetic materials and form as one.
For said structure, owing to can enough one procedure finish the formation of a plurality of pole pieces and their combination, just can significantly reduce the number of working processes and make easily.And in the case, coil 30e winds the line around bonded block 23e in later process and forms.When this operation, because the outer circumferential side of bonded block 23e all is an opening-wide state spreading all on full week, then winding operation can be very easy to finish.And, for structure division identical or equal with preceding figure on function, consider that explanation is repetition, and adopt label and the additional letter e identical, so that the repetitive description thereof will be omitted with preceding figure.(after this figure, consider same reason, then successively additional letter f, g and the repetitive description thereof will be omitted).
Fig. 9 represents another different embodiment of rotor, and the stator S that can install to Fig. 2 as the object identical with Fig. 1 rotor goes up and uses, and constitutes rotor body 37f by basic part 71, magnetic circuit component 72 and magnet 73.Basic part 71 be with synthetic resin for example carry out mold forming and form to keep magnetic circuit component 72 and a plurality of air-supply flabellum 42f.Thickness is the thickness 1～2mm for example with above-mentioned maintenance intensity.Magnetic circuit component 72 is made to be used for that the magnetic pole of the outer peripheral face of magnet 7 is carried out magnetic mutually by for example steel plate and is connected, and thickness is for example 1～1.6mm of thickness that magnetic flux can be unsaturated when passing through.Magnet 73 is used to form the magnetic pole piece of rotor, circumferentially is arranged alternately the magnetic pole piece of the N utmost point and the magnetic pole piece of the S utmost point in the inner peripheral surface upper edge.And, on outer peripheral face, be respectively the magnetic pole of opposite polarity corresponding to the position of these magnetic pole pieces.The thickness of magnet 73 is the thickness that can produce required magnetic flux as rotor magnetic pole department 1～4mm for example.Above-mentioned three is positioned at basic part 17 inboards and magnet 73 by jockey in magnetic circuit component 72 and is positioned under its inboard state and combines, and becomes rotor body 37f.
Figure 10 is the expression embodiment different with the rotor of Fig. 1, Fig. 9, constitutes rotor body 37g with basic part 71g and magnet 75, so that can make rotor R g to use cheap material less man-hour.In the drawings, basic part 71g is used to carry out the maintenance of a plurality of air-supply flabellum 42g and the maintenance of magnet 75, can use known synthetic resin, for example: cheap materials such as nylon, polyvinyl chloride, polyethylene, polypropylene, Merlon, PBT, PET, ABS, AS resin.This basic part 71g and above-mentioned a plurality of air-supply flabellum 42g form as one.Magnet 75 is ring-types as shown, for example is provided with above-mentioned rotor body 37 shown in Figure 4 and identical magnetic pole piece 44N, 44S and magnetic circuit portion 46.The method for making of this magnet 75 as to rotor body 37 explanations of Fig. 4, can be used identical materials, uses identical method for making.Can use by known cheap material for example the formed magnet of ferrite as magnet 75.
The manufacturing of above-mentioned rotor R g is by pressure or adhering device magnet 75 to be fixed on then by made above-mentioned basic part 71g and magnet 75 respectively by other operation that basic part 71g is inboard to be finished.Perhaps, make magnet 75 in advance, carry out the moulding of basic part 71g under the state in the mould that basic part 71 moulding that this magnet 75 is packed into are used, can carry out the moulding of basic part 71g and fixing of basic part 71g and magnet 75 thereof simultaneously.
Above-mentioned Fig. 4, rotor (R, Rg) shown in Figure 10 do not need epitrochanterian magnetic circuit component 72 shown in Figure 9.When so just not needing the part management relevant, assembler with magnetic circuit component 72 yet.If periphery is certain, just can strengthen the internal diameter on the thickness of magnetic circuit component 62.So, make stator become major diameter and can send bigger power.
In above-mentioned the application's invention, can be magnetized into the N utmost point or the S utmost point to a plurality of magnetic pole pieces 17,18 by the energising of giving coil 30, the rotation that can carry out rotor drives.
Though above-mentioned coil 30 is to be configured in along axis stator 14 directions to separate clearance G 1 and between the pole piece 15,16 that is provided with, but when carrying out the winding operation of this coil 30, can be to carry out under the state that opens wide around the coil 30, thereby have the effect that is very easy to carry out this winding operation.
Because above-mentioned coil 30 and above-mentioned pole piece 15,16 have position as described above relation, then magnetizing above-mentioned magnetic pole piece at 17,18 o'clock by coil 30, only just can be magnetized into the N utmost point to the side in the magnetic pole piece 17,18 respectively with a coil 30, the opposing party is magnetized into the S utmost point.Therefore the winding operation of above-mentioned coil 30 coil of coiling only just has the effect on the manufacturing operation that meets the demands with few man-hour.
Rotor of the present invention is provided with the magnet that is formed hollow and annular by the moulding material of tool magnetic properties, and all within it sides are provided with and are used to make magnetic flux to reach a plurality of magnetic pole pieces of above-mentioned hollow bulb respectively with being provided with at outer circumferential side these magnetic pole pieces to be carried out the magnetic circuit portion that magnetic is connected mutually, owing to just made the characteristics of rotor when each magnetic pole piece of all sides is magnetized into the magnetic flux density that is higher than each outer side part thereby has on this magnet being installed to any basic part such as rotating shaft in above-mentioned.The effect that number of spare parts reduces, the selection arbitrariness of basic part increases is so just arranged
And, when above-mentioned rotor body is made, being placed on every side many places at the moulding material under certain state of the flowability that contains magnetic material is respectively equipped with around the internal mold of the magnetic pole that magnetizes that is used to form magnetic pole piece, finish the formation of magnetic pole piece from the inboard, thereby just can finish the formation of magnetic pole piece with the magnetic pole that magnetizes of low magnetic.The effect that can realize simplifying magnetizing equipment like this, is just arranged.
Carry out moulding owing to resemble above-mentioned, just can once make the above-mentioned this rotor body that is provided with magnetic pole piece and magnetic circuit portion, the effect that can reduce work hours and make is just arranged with the global formation operation.
Owing to resemble the mold forming that carries out moulding material above-mentioned, just can when above-mentioned rotor body moulding, make the moulding of a plurality of air-supply flabellum together, can be with regard to having to finish the effect of the manufacturing of being with flabellum rotor few man-hour.
For the store keeping that is used to make, can only manage above-mentioned moulding material, just have and manage the effect of extremely simplifying man-hour.
Claims (4)
1. miniature motor, comprise rotor body (37), has the space (38) that is used to settle stator S in the inboard, with the stator S that is configured in this inner space, said stator S is included in has magnetic pole piece (17 respectively on the circumferential position, 18) a plurality of pole pieces (15,16) and be used for to above-mentioned pole piece (15,16) provide the coil (30) of the magnetization magnetic flux of magnetic pole piece, it is characterized in that, above-mentioned pole piece (15,16), on the axis direction of said stator S, separate the clearance G 1 that is used for positioned coil, and be configured at projection finding and each pole piece (15 from above-mentioned direction of principal axis, 16) magnetic pole piece (17,18) be the different state in position of circumferentially going up at center with above-mentioned axis, above-mentioned coil (30) is configured to make the pole piece (15 that separates on above-mentioned axis direction in above-mentioned clearance G 1,16) magnetic pole piece (17,18) be magnetized into heteropole mutually.
2. miniature motor, comprise rotor body (37), has the space (38) that is used to settle stator S in the inboard, with the stator S that is configured in this inner space, it is characterized in that, above-mentioned rotor body (37) comprises the magnet (37) that is formed hollow and annular by the moulding material with magnetic property, interior all sides at this magnet (37) have a plurality of magnetic pole pieces (44) that are used for providing to above-mentioned space respectively magnetic flux, each magnetic pole piece (44) of all sides is magnetized into the magnetic flux density that is higher than each outer circumferential side part in outer circumferential side has the magnetic circuit portion (46) that these magnetic pole pieces is carried out mutually the magnetic connection, be above-mentioned.
3. miniature motor, comprise rotor body (37), the inboard has the space that is used to settle stator S, with the stator S that is configured in this inner space, it is characterized in that, above-mentioned rotor body (37) comprises and is used for a plurality of magnetic pole pieces (44) of magnetic flux being provided and these magnetic pole pieces being carried out mutually the magnetic circuit portion (46) that magnetic is connected for respectively above-mentioned space, (around it, have a plurality of air-supply flabellums (42) on 37 at above-mentioned rotor body, above-mentioned rotor body (37) and a plurality of air-supply flabellum (42) form by the moulding material that possesses magnetic property is whole, and (44 are magnetized into and make the magnetic flux density of interior all sides be higher than each outer circumferential side part above-mentioned each magnetic pole piece.
4. the manufacture method of the rotor body of a miniature motor, it is characterized in that, be used to make the internal mold (59) of rotor body (37) moulding of the miniature motor that has the space of settling stator S in the inboard to have to be used for around it many places to form the magnetic pole that magnetizes (62) of each magnetic pole piece respectively, the moulding material of certain state of the flowability that the same bond material that is used for combining with it of powdery hard ferrite material is mixed in the placed around of above-mentioned internal mold (59), thereby under this laying state, make the part that this moulding material solidifies at the magnetic pole 62 that magnetizes that faces toward above-mentioned rotor body (37) form magnetic pole piece (44).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7338096A JPH09163650A (en) | 1995-11-30 | 1995-11-30 | Manufacture of rotor with vane and rotor body |
| JP338096/95 | 1995-11-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1151627A true CN1151627A (en) | 1997-06-11 |
| CN1090402C CN1090402C (en) | 2002-09-04 |
Family
ID=18314876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96110076A Expired - Fee Related CN1090402C (en) | 1995-11-30 | 1996-06-13 | Small motor |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH09163650A (en) |
| KR (1) | KR100385597B1 (en) |
| CN (1) | CN1090402C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106451857A (en) * | 2016-11-28 | 2017-02-22 | 江门麦威电子科技有限公司 | Oblique magnetic circuit and magnet ring assembly for external rotor of brushless direct current motor, and production method thereof |
| CN111446835A (en) * | 2019-01-11 | 2020-07-24 | 精工电子有限公司 | Stator, stepping motor, movement for timepiece, and method of manufacturing stator |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102505308B1 (en) | 2020-11-19 | 2023-03-06 | 보그워너창녕 유한책임회사 | Manufacturing method of roter with forged slot |
| KR20220068516A (en) | 2020-11-19 | 2022-05-26 | 보그워너피디에스창녕 유한회사 | Magnetization method of roter magnet |
-
1995
- 1995-11-30 JP JP7338096A patent/JPH09163650A/en active Pending
-
1996
- 1996-05-31 KR KR1019960019295A patent/KR100385597B1/en not_active IP Right Cessation
- 1996-06-13 CN CN96110076A patent/CN1090402C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106451857A (en) * | 2016-11-28 | 2017-02-22 | 江门麦威电子科技有限公司 | Oblique magnetic circuit and magnet ring assembly for external rotor of brushless direct current motor, and production method thereof |
| CN111446835A (en) * | 2019-01-11 | 2020-07-24 | 精工电子有限公司 | Stator, stepping motor, movement for timepiece, and method of manufacturing stator |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100385597B1 (en) | 2003-08-19 |
| CN1090402C (en) | 2002-09-04 |
| JPH09163650A (en) | 1997-06-20 |
| KR970031170A (en) | 1997-06-26 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
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Granted publication date: 20020904 |