CN1928345A - Fluid pump and motor and method for manufacturing same - Google Patents

Fluid pump and motor and method for manufacturing same Download PDF

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Publication number
CN1928345A
CN1928345A CNA2006101290524A CN200610129052A CN1928345A CN 1928345 A CN1928345 A CN 1928345A CN A2006101290524 A CNA2006101290524 A CN A2006101290524A CN 200610129052 A CN200610129052 A CN 200610129052A CN 1928345 A CN1928345 A CN 1928345A
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CN
China
Prior art keywords
permanent magnet
rotor
resin
axle
composite
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Granted
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CNA2006101290524A
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Chinese (zh)
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CN100467850C (en
Inventor
酒井博美
长田喜芳
角谷慎司
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Denso Corp
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Denso Corp
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Publication of CN1928345A publication Critical patent/CN1928345A/en
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Publication of CN100467850C publication Critical patent/CN100467850C/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/048—Arrangements for driving regenerative pumps, i.e. side-channel pumps

Abstract

A fluid pump includes a motor portion (13) that has a stationary part (40) and a rotator (60). The inner circumferential periphery of the stationary part (60) and the outer circumferential periphery of the rotator define a fuel passage (102) therebetween. The rotator (60) is rotatable around the inner circumferential periphery of the stationary part. The motor portion (13) drives a pump portion (12) for pumping fuel through the fuel passage (102). The rotator (60) includes a permanent magnet (64, 264) that is formed by injection molding a composite material containing a magnetic material and resin. The permanent magnet (64, 264) has one end with respect to the axial direction of the permanent magnet (64,264). The one end defines an axial end surface (67, 267). The axial end surface (67, 267) has an injection port mark (66, 266).

Description

Fluid pump and electric notor and manufacture method thereof
Technical field
The present invention relates to fluid pump and electric notor, and the method for making described fluid pump and electric notor.The invention still further relates to the method for the permanent magnet of making described electric notor.
Background technique
According to Japan Patent JP-A-2001-268874, an electric notor comprises a rotor and a standing part, is used to produce magnetic field.One of rotor and standing part can be formed by permanent magnet, and its composite by will comprising magnetic material and resin is by forming in inlet injection moulding to one injection molding.When being formed with the inlet mark on the surface of the permanent magnet of a wall surface that is limiting fuel channel, the projection and the depression that are limited owing to the inlet mark make the fuel resistance in the fuel channel increase.And the part that limits the inlet mark on permanent magnet gets rusty easily owing to being immersed in the fuel.Owing to get rusty and when raising in permanent magnet, the fuel resistance in the fuel channel can further increase when this part that limits the inlet mark.
In addition, in above-mentioned electric notor, an axle is inserted in the cylindrical hole of permanent magnet, so permanent magnet is fixed.Yet when the through hole of permanent magnet was out of shape owing to time variation or analogue, the adhesive strength between permanent magnet and the axle will weaken, and permanent magnet can be peeled off from axle.Support permanent magnet or coil a resin piece can to similar being fixed on the axle of above-mentioned permanent magnet.Even in this structure, when resin piece when axle is peeled off, permanent magnet or coil can be peeled off from axle.In this case, because permanent magnet or coil be with respect to the moving of axle, the moment of torsion that produces in permanent magnet or coil can suitably not be delivered on the axle.
Summary of the invention
Consider front and other problems, an object of the present invention is to propose a kind of petrolift, it comprises rotor and the stationary part that limits fuel channel, but the fuel resistance in the fuel limitation passage.Another object of the present invention is to propose a kind of electric notor, and wherein permanent magnet or coil are maintained on the axle of rotor.
According to an aspect of the present invention, provide a kind of fluid pump, it comprises the motor part with stationary part and rotor.Described stationary part has the inner circumference limit.Described rotor has outer annulus edge.Limit fuel channel between described inner circumference limit and the outer annulus edge.Described rotor can be around the rotation of described inner circumference limit.Described fluid pump further comprises the pump part, and it is partly driven by described motor, with by described fuel channel pump fuel.Described rotor comprises permanent magnet, and it forms by the composite injection moulding that will include magnetic material and resin.Described permanent magnet has an end on the axial direction of described permanent magnet.A described end limits axial end surface.Described axial end surface has the inlet mark.
As selection, according to another aspect of the present invention, provide a kind of fluid pump, it comprises the motor part with stationary part and rotor.Described stationary part has the inner circumference limit.Described rotor has outer annulus edge.Limit fuel channel between described inner circumference limit and the outer annulus edge.Described rotor can be around the rotation of described inner circumference limit.Described fluid pump further comprises the pump part, and it is partly driven by described motor, with by described fuel channel pump fuel.Described stationary part comprises permanent magnet, and it forms by the composite injection moulding that will include magnetic material and resin.Described permanent magnet has an end on the axial direction of described permanent magnet.A described end limits axial end surface.Described axial end surface has the inlet mark.
As selection, according to another aspect of the present invention, provide a kind of fluid pump, it comprises the motor part with stationary part and rotor.Limit fuel channel between the inner circumference limit of described stationary part and the outer annulus edge of described rotor.Described rotor can be around the described inner circumference limit rotation of described stationary part.One of described stationary part and described rotor comprise permanent magnet, and described permanent magnet has axial end surface on a side of an end on the axial direction of described permanent magnet.Described fluid pump further comprises the pump part, and it is partly driven by described motor, with by described fuel channel pump fuel.A kind of method of making described fluid pump also is provided, it composite injection moulding that comprises that the mould that has an inlet by use will include magnetic material and resin forms permanent magnet, and described inlet is arranged in a part of the described axial end surface that is used to form described permanent magnet.
As selection, according to another aspect of the present invention, provide a kind of method of making the permanent magnet of one of the stationary part that constitutes electric notor and rotor, it comprises that the composite that will include magnetic material and resin is injected in the mould by inlet.The manufacture method of described permanent magnet further comprises the permanent magnet that forms a general cylindrical by described composite being solidificated in described mould and the described inlet in described mould.The manufacture method of described permanent magnet comprises that further the described composite that will be solidificated in the described inlet removes from the axial end surface of described permanent magnet.Described axial end surface limits an end on the axial direction of described permanent magnet of described permanent magnet.
As selection, according to another aspect of the present invention, provide a kind of manufacturing to have the method for the electric notor of the permanent magnet that constitutes one of stationary part and rotor, it comprises that the composite that will include magnetic material and resin is injected in the mould by inlet.The manufacture method of described electric notor further comprises the permanent magnet that forms a general cylindrical by described composite being solidificated in described mould and the described inlet in described mould.The manufacture method of described electric notor comprises that further the described composite that will be solidificated in the described inlet removes from the axial end surface of described permanent magnet, described axial end surface limits an end on the axial direction of described permanent magnet of described permanent magnet.The manufacture method of described electric notor further comprises and will combine coaxially substantially as another of the described permanent magnet of one of described stationary part and described rotor and described stationary part and described rotor, makes radially to limit a general cylindrical fluid passage between in described permanent magnet and described stationary part and the described rotor another.
As selection, according to another aspect of the present invention, provide a kind of electric notor, it comprises stationary part, described stationary part has the inner circumference limit.Described electric notor further comprises rotor, and described rotor can be around the rotation of described inner circumference limit.Described rotor comprises axle and resin part.The outer annulus edge that described axle has the depression of limiting.Described resin is partly by forming the injection moulding of one of resin and composite.Described composite comprises resin.Described resin partly covers described depression.
As selection, according to another aspect of the present invention, provide a kind of electric notor, it comprises stationary part, described stationary part has the inner circumference limit.Described electric notor further comprises rotor, and described rotor can be around the rotation of described inner circumference limit.Described rotor comprises axle and resin part.Described axle has the outer annulus edge of the projection of limiting.Described resin is partly by forming the injection moulding of one of resin and composite.Described composite comprises resin.Described resin partly covers described projection.
Description of drawings
By with reference to the accompanying drawings detailed description subsequently, above of the present invention and other purposes, feature and advantage will become more apparent.In the accompanying drawing:
Fig. 1 is a partial, longitudinal cross-sectional, shows a petrolift according to first embodiment;
Fig. 2 is a sectional view, shows the mould of the permanent magnet that is used for molded this petrolift;
Fig. 3 A is a schematic representation to 3C, shows the example of the variation of permanent magnet;
Fig. 4 is a partial sectional view, shows permanent magnet and axle according to second embodiment's petrolift;
Fig. 5 is a partial, longitudinal cross-sectional, shows the petrolift according to the 3rd embodiment;
Fig. 6 is a partial, longitudinal cross-sectional, shows the petrolift according to the 4th embodiment;
Fig. 7 is a schematic representation, shows permanent magnet and axle according to the 4th embodiment's petrolift;
Fig. 8 is a partial sectional view, shows according to the 4th embodiment's the permanent magnet and the example of the variation of axle;
Fig. 9 is a partial sectional view, shows according to the 4th embodiment's the permanent magnet and the example of the variation of axle;
Figure 10 is a partial sectional view, shows the example of variation according to the 4th embodiment's axle;
Figure 11 A is a schematic representation to 11C, shows according to the 4th embodiment's the permanent magnet and the example of the variation of axle;
Figure 12 is a partial sectional view, shows permanent magnet and axle according to the 5th embodiment;
Figure 13 is a partial sectional view, shows permanent magnet and axle according to the 6th embodiment.
Embodiment
(first embodiment)
As shown in Figure 1, this embodiment's petrolift 10 for example is a formula turbine pump in the case.Petrolift 10 for example is located in the fuel tank of the motor with 150cc size engine.Petrolift 10 comprises a pump part 12 and a motor part 13.Motor part 13 makes 12 rotations of pump part.
Housing 22 holds pump part 12 and motor part 13.Pump part 12 comprises the pump box 30,32 that rotatably holds an impeller 34.Limit pump channel 100 between pump box 30,32 and the impeller 34.Pump channel 100 is cardinal principle C shapes.
Motor part 13 is as brushless motor, and it comprises a stator core 40, wrapping wire pipe 50, coil 54 and a rotor 60.Stator core 40 is as standing part.Stator core 40 is axially curled each other by the magnetic steel plate that will pile up and is formed.Stator core 40 has towards six outstanding teeth 42 of the center of motor part 13.These six teeth 42 with the interval of rule substantially in circumference.Each coil 54 twines round each bobbin 50 of each tooth 42.Each coil 54 is electrically connected with each terminal 56.Electricity supply to each coil 54 is controlled according to the rotational position of motor 60.
Rotor 60 comprises an axle 62 and a permanent magnet 64.Rotor 60 can be around the inner circumference limit rotation of stator core 40.Permanent magnet 64 is resin magnets, is mixed with the thermoplastic resin as polyphenylene sulfides (PPS) by the magnetic as NeFeB.Axle 62 is molded by permanent magnet 64 folder things.Permanent magnet 64 has eight magnetic poles 65 arranging according to sense of rotation.Eight magnetic poles 65 are magnetized and limit magnetic pole with the outer annulus edge towards permanent magnet 64.The outer annulus edge of permanent magnet 64 is relative with the inner circumference limit of stator core 40.Magnetic pole differs from one another with respect to the sense of rotation of rotor 60.Axle 62 can rotatably support at two ends by bearing 36.
When stator core 40 and coil 54 by resin molded the time, an end cap 72 is integrally moulded by resin.End cap 72 has an exhaust port 104.
Fuel sucks by an entry port that is provided with on pump box 30.Fuel sucks by entry port, and is pressurizeed by the rotation of impeller 34 by path 10 0.The fuel of pressurization by fuel channel 102 forced feeds that between the outer annulus edge of the inner circumference limit of stator core 40 and rotor 60, limit to exhaust port 104.Fuel is discharged to motor by discharging 104.
When the wall surface of fuel channel 102 had projection and depression, the fuel resistance in the fuel channel 102 increased.Therefore, fuel can reduce with respect to the energy consumption discharge flow rate of motor part 13.
Therefore, in first embodiment, the excircle end 68 of permanent magnet 64 forms flat substantially, to strengthen the discharge flow rate of fuel with respect to the energy consumption of motor part 13.The excircle end 68 of permanent magnet 64 partly limits fuel channel 102.
Permanent magnet 64 is by following method injection moulding.
As shown in Figure 2, at first, axle 62 is fixed on the mould 90, makes axle 62 partly be exposed to mould 90 inside.Mould 90 has inlet 92 around axial end 91, this axial end is positioned at the end about the axial direction of axle 62 of mould 90.Subsequently, by through inlet 92 composite being injected in the mould 90 and with permanent magnet 64 injection mouldings.Composite comprises thermoplastic resin and magnetic.
The permanent magnet 64 that forms by said method has inlet mark 66 on an axial end surface 67 of permanent magnet 64.Axial end surface 67 is positioned at the end on the axial direction of axle 62 of permanent magnet 64.Just, permanent magnet 64 does not have inlet mark 66 in limiting the excircle end 68 of fuel channel 102.The increase of the fuel resistance that produces owing to the projection in inlet mark 66, depression and analog in therefore, can fuel limitation path 10 2.Therefore, reduced fuel resistance in the fuel channel 102.When forming on the axial end surface 67 of at least one inlet mark 66 at permanent magnet 64, as shown in Figure 3A, an inlet mark 66 can be formed on the axial end surface 67.As selection, to shown in the 3C, two or more inlet marks 66 can form on axial end surface 67 as Fig. 3 B.
Axial end surface 67 and excircle end 68 limit an annular substantially angle in permanent magnet 64.The common chamfering of cardinal principle annular angle of permanent magnet 64.In a structure, the angle chamfering of permanent magnet 64 can limit a chamfered area of annular substantially outside in the axial end surface 67 around the circumferential end 68.This chamfered area can have the width with respect to the radial direction of permanent magnet 64.The width of chamfered area can be from excircle end 68 inwardly about 0.3mm.Chamfered area in the axial end surface 67 can tilt towards fuel channel 102 by making permanent magnet 64 chamferings.
When getting rusty in the permanent magnet 64, inlet mark 66 can partly raise, and perhaps the axial end surface 67 around the inlet mark 66 can raise.If inlet mark 66 forms in the chamfered area that tilts towards fuel channel 102, the axial end surface 67 around inlet mark 66 or the inlet mark 66 can be owing to getting rusty in permanent magnet 64 raises.Therefore, the part of rising can be projected in the fuel channel 102.
As shown in Figure 2, permanent magnet 64 uses the mould 90 with the axial end 91 that limits inlet 92 to come injection moulding.Shown in arrow among Fig. 2 94, with respect to the radial direction of axle 62, inlet 92 can with the inner wall surface 93 spaced apart intended distances or more of mould 90.The inner wall surface 93 of mould 90 limits the excircle end 68 of permanent magnet 64.Consider the chamfering that the angle applied to limiting between axial end surface in permanent magnet 64 67 and the excircle end 68 usually, above-mentioned predetermined distance can be about 0.3mm.
The zone of permanent magnet 64 the chamfered area in axial end surface 67 that forms with said method has inlet mark 66.Just, inlet mark 66 is formed on a zone except chamfered area, and this zone does not tilt towards fuel channel 102.Therefore, even the axial end surface 67 around the inlet mark 66 is partly raise, it is outstanding towards fuel channel 102 also can to limit raised portion, can not increase owing to raised portion makes the fluid resistance in the fuel channel 102 thereby can limit.
In this embodiment, each permanent magnet is formed by the composite that comprises magnetic material and the resin as polyphenylene sulfides (PPS).PPS has high chemical stability, and making permanent magnet can not be protected can degenerate owing to being immersed in the fuel.
In this embodiment, each petrolift can be by the straightforward procedure manufacturing, and it does not need the manufacturing step as the excircle end that limits fuel channel that will be formed at permanent magnet or the inlet mark in the inner circumference end remove.Therefore, can be limited in fuel resistance in the fuel channel that limits between rotor and the standing part by for example under the situation that need not remove the inlet mark, making petrolift.
(second embodiment)
As shown in Figure 4, the rotor 260 of second embodiment's petrolift comprises axle 62, rotary core 269 and permanent magnet 264.Permanent magnet 264 is the resin magnets that form by the composite injection moulding that will comprise thermoplastic resin as PPS and the magnetic as NeFeB.Permanent magnet 264 forms general cylindrical, and is fixed to the outer annulus edge of rotary core 269.Permanent magnet 264 has eight magnetic poles arranging according to sense of rotation, and is similar to the permanent magnet 64 among first embodiment.
Towards the outlet pressure feeding, and fuel is discharged to motor by exhaust port to pressurized fuel by the fuel channel that limits between the excircle end 268 of the inner circumference limit of stator core and permanent magnet 164, and is similar to the petrolift 10 among first embodiment.
Permanent magnet 264 on an end surfaces 267 on the axial direction of axle 62, be limited with an inlet mark 266.Just, the inlet mark is not to be formed on the wall surface of the fuel channel that limits between the outer annulus edge 268 of the inner circumference limit of stator core and permanent magnet 264.The increase of the fuel resistance in therefore, can the fuel limitation passage.Inlet mark 266 is formed at the end surfaces 267 of permanent magnet 264.At axle 62 in the radial direction, inlet mark 266 and the excircle end 268 spaced apart about 0.3mm or more that limit fuel channel, similar to the permanent magnet 64 among first embodiment.Therefore, the fluid resistance in can the fuel limitation passage increases owing to raising around the inlet mark 266.
(the 3rd embodiment)
As shown in Figure 5, petrolift 310 comprises pump part 320, motor part 330 and end portion supports lid 314.Motor part 330 makes impeller 326 rotations of pump part 320.Shell 312 is around the outer annulus edge of pump part 320 and motor part 330.Shell 312 is public shells of pump part 320 and motor part 330.End portion supports lid 314 covers motor part 330 one sides opposite with pump part 320.End portion supports lid 314 limits fuel discharge outlet 306.
Pump part 320 for example is a Wesco pump.Pump part 320 comprises a pump cover 322, a pump box 324 and an impeller 326.Pump cover 322 and pump box 324 are the housing elements that rotatably hold impeller 326.Limit pump channel 302 between pump cover 322 and the impeller 326.Limit pump channel 302 between pump box 324 and the impeller 326.Pump channel 302 is C shapes substantially.
Each permanent magnet 332 is the resin magnets that form by the composite injection moulding that will comprise thermoplastic resin as PPS and magnetic.Each permanent magnet 332 forms quadrant arc substantially.Four permanent magnets 332 are located on the inner peripheral wall of shell 312 at interval circumferentially with rule, limit the magnetic pole that the sense of rotation with respect to motor part 330 differs from one another whereby.
Commutator 370 is assembled on the end of a side opposite with pump part 320 for the axial direction of axle 341 of armature 340.Permanent magnet 332, armature 340, rectifier 370 and a unshowned brush have constituted a d.c. motor.Armature 340 comprises axle 341, and it is rotatably supported by bearing 318, and these bearings hold respectively and are fixed in pump box 324 and the bearing support 316.
Armature 340 is included in a center core 342 of its rotating center.Axle 341 is inserted in the center core 342 by pressure.Center core 342 is cylindrical, and cross section is a Hexagon substantially.Have six grooves 350 on the outer annulus edge of center core 342, they are arranged on sense of rotation.Each groove 350 comprises a magnetic bobbin core 352, a bobbin 360 and a coil 362.Coil 362 is homocentric windings, forms by line is twined around bobbin 360.
Commutator 370 comprises 12 sections, and they are arranged according to the sense of rotation of rectifier 370.
Has an entry port 300 on the pump cover 322.Fuel sucks by entry port 300, and passes through rotation process pump channel 302 pressurizeds of impeller 326.The fuel of supercharging is arrived in the fuel channel 304 that limits between the armature 340 of permanent magnet 332 and motor part 330 by force feed.Therefore, after process fuel channel 304, fuel is discharged from exhaust port 306.
Each permanent magnet 332 has an axial end surface 367 on the axial direction of axle 341.The axial end surface 367 of each permanent magnet 332 limits an inlet mark 366.In this structure, the wall surface of fuel channel 304 can be restricted and not cause owing to limiting projection and the depression that the inlet mark produces.Therefore, the fuel resistance in the fuel channel 304 can reduce.
In said structure, inlet mark 366 is formed in the axial end surface 367 of permanent magnet 332.At axle 341 in the radial direction, inlet mark 366 and the inner circumference limit 368 spaced apart 0.3mm or more that limit fuel channel 304, this is similar to the permanent magnet 64 among first embodiment.Therefore, the fuel resistance in the fuel channel 304 can not be restricted can increase owing to raising around the inlet mark 366.
In this embodiment, permanent magnet 332 can be used as a stationary part.Armature 340 and commutator 370 can be used as rotor.
In the above embodiments, the above-mentioned manufacture method that is used for electric notor comprises that the composite that will include magnetic material and resin injects in the mould by inlet, and wherein, this electric notor has the permanent magnet that constitutes one of stationary part and rotor.The permanent magnet of general cylindrical can be by solidifying and form in mould at the composite in mould and the inlet.The manufacture method of electric notor may further include the composite that will be solidificated in inlet and removes from the axial end surface of permanent magnet.The manufacture method of electric notor may further include permanent magnet is combined substantially coaxially as another of one of stationary part and rotor and stationary part and rotor, makes permanent magnet radially limit a fluid passage of cylinder substantially with between another of stationary part and rotor.
(the 4th embodiment)
As shown in Figure 6, this embodiment's petrolift 410 is provided in a side of the interior formula turbine pump of a case in the fuel tank.Petrolift 410 can be applied to for example have the motor of 150cc size engine.
Petrolift 410 comprises pump part 412 and motor part 413.Motor part 413 makes 412 rotations of pump part.Shell 414 by a sheetmetal being pressed into substantially cylindrical by pressure forming.The thickness of sheetmetal can be about 0.5mm.Shell 414 is as the shell of pump part 412 and motor part 413.The shell 414 that is formed by thin plate has a projection 416.Projection 416 forms by shell 414 between pump part 412 and the motor part 413 is radially caved inward.
Pump part 412 is turbine pumps, and it comprises pump box 420,422 and impeller 424.Pump box 422 axial pressures are inserted on the projection 416 that arrives shell 414 in the shell 414.Therefore, pump box 422 is axially aligned.Pump box curls by an end that makes shell 414 and fixes.
Pump box 420,422 rotatably holds impeller 424.Pump box 420,422 and impeller 424 limit the fuel channel 470 of C shape substantially between them.Fuel is sucked by a unshowned entry port in the pump box 420, and pressurized by fuel channel 470 by the rotation of impeller 424, and force feed is to motor part 413 whereby.A fuel channel 472 that is limited between through stator core 430 and rotor 450 to the fuel of motor part 413 by force feed is fed to motor by an exhaust port 474 later.Exhaust port 474 is limited in the axial direction motor part 413 one sides opposite with pump part 412.
Motor part 413 as electric notor is brushless motors, and it comprises stator core 430, bobbin 440, coil 442 and rotor 450.Stator core 430 as standing part is to be made of six core bodys 432 in circumference.Unshowned control gear realizes being supplied to the all-wave control of the three phase circuit of each coil 442 according to the rotational position of rotor 450, changes the magnetic pole that limits on the inner circumference limit of the core body 432 relative with rotor 450 whereby.
Each bobbin 440 that is formed by electric insulation resin cooperates with each core body 432.Each coil 442 was an independent element by under certain condition line concentrically being formed around each bobbin 440 winding before each core body 432 is being assembled on the petrolift 410 under this condition.Each coil 442 is electrically connected with each terminal 444 in end cover 448 1 sides.
Rotor 450 comprises an axle 452 and a permanent magnet 454.Rotor 450 can be around the inner circumference limit rotation of stator core 430.Axle 452 rotatably is supported in two ends by bearing 426.Axle 452 has the outer annulus edge 453 of depression of limiting 400.Concrete, as shown in Figure 7, depression 400 is for example limited by step 403 and annular knurl groove 404.Step 403 is limited by the small diameter portion 402 of axle 452.Annular knurl groove 404 limits on the outer annulus edge of small diameter portion 402.
Permanent magnet 454 is cylindrical resin magnets that covered the depression 400 of axle 452.Permanent magnet 454 is as the resin part.Permanent magnet 454 is to form by comprising the composite injection moulding that thermoplastic resin as polyphenylene sulfides (PPS) and polyoxymethylene (POM) and magnetic mix.Permanent magnet 454 has eight magnetic poles 455 arranging according to sense of rotation.Eight magnetic poles 455 are magnetized to limit towards the magnetic pole of the outer annulus edge of permanent magnet 454.The outer annulus edge of permanent magnet 454 is relative with the inner circumference limit of stator core 430.Magnetic pole differs from one another on the sense of rotation of rotor 450.
End cap 448 is integrally moulded by electric insulation resin material 446, and it covers the end of each coil 442 and stator core 430 in stator core 430 1 sides opposite with pump part 412.End cap 448 has an outer annulus edge 449, and an end 415 of shell 414 is press fitted on this outer annulus edge.
End cap 448 has exhaust port 474, and it has held a valve member 460, a stop member 462 and a spring 464.When the fuel pressure of supercharging in the pump part 412 becomes when being equal to or greater than a predetermined pressure, the biasing force of valve member 460 antagonistic springs 464 raises, and makes fuel be discharged to motor by exhaust port 474.
As shown in Figure 7, in the 4th embodiment, axle 452 has depression 400, and permanent magnet 454 has covered depression 400.Area of contact between axle 452 and the permanent magnet 454 is increased by limiting step 403 and annular knurl groove 404, makes that the adhesive strength between axle 452 and the permanent magnet 454 can strengthen.
And permanent magnet 454 directly is formed on axle 452 the outer annulus edge 453 by injection moulding, make the depression 400 of axle 452 be copied to permanent magnet 454 on the surface of axle 452 1 sides.Therefore, permanent magnet 454 cooperates with the depression 400 of axle 452.Therefore, though when permanent magnet 454 when axle 452 is peeled off, permanent magnet 454 does not move with respect to axle 452 yet.Concrete, permanent magnet 454 cooperates with step 403, makes permanent magnet 454 be restricted with respect to the mobile of axial direction of axle 452.Permanent magnet 454 cooperates with annular knurl groove 404, makes permanent magnet 454 be restricted with respect to the rotation of axle 452.
As an example, annular knurl groove 404 can be a diamond-shaped knurling shown in Figure 6.Diamond-shaped knurling has twill shape pattern substantially.Give an example, argyle design substantially is the cardinal principle regular arrangement, to form the shadow-texture line in diamond-shaped knurling.Annular knurl groove 404 can be straight-line knulring shown in Figure 8.Give an example, on circumference, arrange at interval with rule, to form straight-line knulring along the axially extended cardinal principle straight-line groove of the outer annulus edge of small diameter portion 402.Annular knurl groove 404 also can be the annular knurl that tilts.
As shown in Figure 9, rotor 450 can be made of axle 452 with projection 600 and the permanent magnet 454 that has covered projection 600.Give an example, projection 602 can form projection 600.Projection 602 is outstanding with respect to the radial direction of axle 452.In this structure, permanent magnet 454 cooperates with projection 602, makes permanent magnet 454 be limited with respect to the rotation of axle 452, and permanent magnet 454 moving on the axial direction of axle 452 can be limited.
Annular knurl groove 404 can be limited on the outer annulus edge of projection 600.
Shown in Figure 11 A, axle 452 can have projection 710, and its outer annulus edge from axle 452 is radially outstanding.Annular knurl groove 404 can be limited on the projection 710.
Depression 400 or projection 600,710 do not need to be formed on the whole outer annulus edge 453 of axle 452.Give an example, as shown in figure 10, depression 400 or projection 600,710 can partly be formed on the outer annulus edge 453 of axle 452.
And shown in Figure 11 B, 11C, depression 400 can have step 712 or the step 714 on the side that axial direction with respect to axle 452 is limited to annular knurl groove 404.
(the 5th embodiment)
As shown in figure 12, comprise an axle 452, an assembling set 556 and a permanent magnet 554 according to the rotor 550 of the 5th embodiment's motor part.Assembling set 556 has covered the depression 400 of axle 452.Assembling set 556 is as the resin part.Assembling set 556 forms by the composite injection moulding that will comprise thermoplastic resin as PPS and POM and magnetic and mix.Assembling set 556 offers permanent magnet 554.Permanent magnet 554 is magnetized to limit those magnetic poles similar to the 4th embodiment's permanent magnet 454.
In the 5th embodiment, assembling set 556 has covered the depression 400 of axle 452.In this structure, the area of contact between axle 452 and the assembling set 556 is increased by limiting step 403 and annular knurl groove 404.Therefore, the adhesive strength between axle 452 and the assembling set 556 can strengthen, and wherein permanent magnet 554 is located on this assembling set.
And assembling set 556 directly is formed on axle 452 the outer annulus edge 453 by injection moulding, make the depression 400 of axle 452 be copied to assembling set 556 on the surface of axle 452 1 sides.Therefore, assembling set 556 engages with the depression 400 of axle 452.Therefore, though when assembling set 556 when axle 452 is peeled off, permanent magnet 554 and assembling set 556 do not move with respect to axle 452 yet, and permanent magnet 554 and assembling set 556 do not move with respect to the axial direction of axle 452 yet.
(the 6th embodiment)
As shown in figure 13, motor part 13 comprises a rotor 650, and it is made of an assembling set 656 and a coil 654.Assembling set 656 as the resin part is injected into type to axle 452, and is similar to the 5th embodiment's assembling set 556.Assembling set 656 has a plurality of coils 654 of arranging on the sense of rotation of rotor 650.Coil 654 triangles connect.The coil 654 adjacent one another are according to sense of rotation twines on opposite directions.
Therefore, axle 452 and the adhesive strength that has on it between assembling set 656 of coil 654 can be enhanced.And coil 654 and assembling set 656 can be limited with respect to the rotation of axle 452, and coil 654 and assembling set 656 also are limited with respect to the moving of axial direction of axle 452.
In the above embodiments, when being limited with depression circumferentially on the whole outer annulus edge of axle, the adhesive strength between resin part and the axle can further be strengthened.Just, permanent magnet or coil and the axle problem that is caused that gets loose can further stably be limited.
In the above embodiments, an annular knurl groove of overall annular knurl, such as diamond-shaped knurling, straight-line knulring and oblique annular knurl, predetermined angle can tilt at the circumferencial direction of axle.In this structure, resin portion divides the rotation with respect to axle to limit with being stabilized.And when axle had step, the resin part cooperated with step, made the resin portion branch can be limited with respect to moving of axle.Just, permanent magnet or coil moving and can be limited with respect to the axial direction of axle with respect to the rotation of axle.
In the above embodiments, when all being limited with depression on the whole outer annulus edge of axle, the adhesive strength between resin part and the axle can further be strengthened, and makes permanent magnet or coil and the problem that is caused that spool gets loose to limit with being stabilized.
(other embodiments)
In the second and the 3rd embodiment, the inlet mark 366 of of permanent magnet 264, two or more inlet marks 266 and permanent magnet 332 can be similarly constructed with the inlet mark 66 of first embodiment's permanent magnet 64.
Said structure and manufacture method can be applied to multiple fluid pump and electric notor.The fluid pump pump that is not restricted to act as a fuel is applied to petrol engine, and also can be applied to diesel engine or use the motor of alcohol fuel.
The depression 400 and the projection 600 of axle 452 are not limited in the shape shown in the example.Depression 400 and projection 600 can be multiple shapes, just can with respect to moving of axle 452 with peel off and limit permanent magnet 454, permanent magnet 554 or the coil 654 of axle 452 as long as can limit permanent magnet 454, permanent magnet 554 or coil 654.
And in the 5th embodiment, assembling set 556 and permanent magnet 554 can be by on the outer annulus edgies 453 that is formed at axle 452 with two step injection mouldings.In this structure, by on assembling set 556, limiting a depression and protruding similar with protruding 600 to the depression 400 of axle 452, permanent magnet 554 can be limited with peeling off of assembling set 556, has strengthened the adhesive strength between assembling set 556 and the permanent magnet 554 whereby.
The suitably combination of described embodiment's said structure.
Under the situation that does not break away from spirit of the present invention, top embodiment can make multiple different change and modification.

Claims (24)

1. a fluid pump (10) comprising:
Motor part (13), it has stationary part (40) and rotor (60), described stationary part (40) has the inner circumference limit, described rotor (60) has outer annulus edge, limit fuel channel (102) between described inner circumference limit and the outer annulus edge, described rotor (60) can be around the rotation of described inner circumference limit; And
Pump part (12), it is driven by described motor part (13), with by described fuel channel (102) pump fuel,
Wherein said rotor (60) comprises permanent magnet (64,264), and it forms by the composite injection moulding that will include magnetic material and resin,
Described permanent magnet (64,264) has an end on the axial direction of described permanent magnet (64,264), and a described end limits axial end surface (67,267), and
Described axial end surface (67,267) has inlet mark (66,266).
2. fluid pump according to claim 1 (10) is characterized in that, described inlet mark (66,266) in described axial end surface (67,267) with the spaced apart intended distance of excircle end (68,268) of described rotor (60).
3. fluid pump according to claim 2 (10) is characterized in that described intended distance is equal to or greater than 0.3mm.
4. according to any one described fluid pump (10) of claim 1 to 3, it is characterized in that described resin is a polyphenylene sulfides.
5. a fluid pump (310) comprising:
Motor part (330), it has stationary part (332) and rotor (340,370), described stationary part (332) has the inner circumference limit, described rotor (340,370) has outer annulus edge, limits fuel channel (304) between described inner circumference limit and the outer annulus edge, described rotor (340,370) can be around the rotation of described inner circumference limit; And
Pump part (320), it is driven by described motor part (330), with by described fuel channel (304) pump fuel,
Wherein said stationary part (332) comprises permanent magnet (332), and it forms by the composite injection moulding that will include magnetic material and resin,
Described permanent magnet (332) has an end on the axial direction of described permanent magnet (332), and a described end limits axial end surface (367), and
Described axial end surface (367) has inlet mark (366).
6. fluid pump according to claim 5 (310) is characterized in that, described inlet mark (366) in described axial end surface (367) with the spaced apart intended distance of the inner circumference end of described stationary part (332).
7. fluid pump according to claim 6 (310) is characterized in that described intended distance is equal to or greater than 0.3mm.
8. according to any one described fluid pump (310) of claim 5 to 7, it is characterized in that described resin is a polyphenylene sulfides.
9. method of making fluid pump (10,310), described fluid pump (10,310) comprising:
Motor part (13,330), it has stationary part (40,332) and rotor (60,260,340,370), the inner circumference limit of described stationary part (40) and described rotor (60,260,340,370) limit fuel channel (102,304) between the outer annulus edge, described rotor (60,260,340,370) can be around the rotation of described inner circumference limit, described stationary part (40,332) and described rotor (60,260,340,370) one of comprise permanent magnet (64,264,332), described permanent magnet is at described permanent magnet (64,264, has axial end surface (67,267,367) on one side of an end on the axial direction 332); And
Pump part (12,320), it is driven by described motor part (13,330), with by described fuel channel (102,304) pump fuel,
Described manufacture method comprises:
The composite injection moulding that the mould (90) that has inlet (92) by use will include magnetic material and resin forms described permanent magnet (64,264,332), described inlet (92) is positioned at and is used to form described permanent magnet (64,264, in the part of described axial end surface 332) (67,267,367).
10. the method for the permanent magnet (64,264,332) of one of a stationary part (40,332) that make to constitute electric notor (13,330) and rotor (60,260,340,370), described manufacture method comprises:
The composite that will include magnetic material and resin is injected in the mould (90) by inlet (92);
In described mould (90), form the permanent magnet (64,264,332) of a general cylindrical by described composite being solidificated in described mould (90) and the described inlet (92); And
To be solidificated in described composite in the described inlet (92) from described permanent magnet (64,264,332) axial end surface (67,267,367) remove described axial end surface (67 in, 267,367) limit the end on the axial direction of described permanent magnet (64,264,332) of described permanent magnet.
11. a manufacturing has electric notor (13, the 330) method of the permanent magnet (64,264,332) of one of formation stationary part (40,332) and rotor (60,260,340,370), described manufacture method comprises:
The composite that will include magnetic material and resin is injected in the mould (90) by inlet (92),
In described mould (90), form the permanent magnet (64,264,332) of a general cylindrical by described composite being solidificated in described mould (90) and the described inlet (92);
To be solidificated in described composite in the described inlet (92) from described permanent magnet (64,264,332) axial end surface (67,267,367) remove described axial end surface (67 in, 267,367) limit the end on the axial direction of described permanent magnet (64,264,332) of described permanent magnet; And
Will be as described stationary part (40,332) and described rotor (60,260,340,370) one of described permanent magnet (64,264,332) with described stationary part (40,332) and described rotor (60,260,340,370) another in substantially combines with one heart, makes described permanent magnet (64,264,332) with stationary part (40,332) and described rotor (60,260,340,370) radially limit a general cylindrical fluid passage between another in.
12. an electric notor (413) comprising:
Stationary part (430), described stationary part has the inner circumference limit; And
Rotor (450,550,650), described rotor can rotate around described inner circumference limit,
Wherein said rotor (450,550,650) comprises axle (452) and resin part (454,556,656),
Described axle (452) has the outer annulus edge (453) of the depression of limiting (400),
Described resin part (454,556,656) is by forming the injection moulding of one of resin and composite, and described composite comprises resin, and
Described resin part (454,556,656) covers described depression (400).
13. electric notor according to claim 12 (413) is characterized in that, described depression (400) limits on the whole circumference of described outer annulus edge (453).
14. according to claim 12 or 13 described electric notors (413),
It is characterized in that described axle (452) has small diameter portion (402), and
Described depression (400) has step (403,412,414) and annular knurl groove (404), described small diameter portion (402) limits described step (403,412,414), and described small diameter portion (402) have the outer annulus edge that limits described annular knurl groove (404).
15. electric notor according to claim 14 (413) is characterized in that, described annular knurl groove (404) is a cardinal principle twill shape.
16., it is characterized in that described resin part (454,556,656) is the permanent magnet (454,554) that is formed by the composite that includes resin and magnetic material according to claim 12 or 13 described electric notors (413).
17., it is characterized in that described rotor (450,550,650) comprises the permanent magnet (454,554) that offers described resin part (454,556,656) according to claim 12 or 13 described electric notors (413).
18. according to claim 12 or 13 described electric notors (413),
It is characterized in that the described resin part (454,556,656) of described rotor (450,550,650) comprises a plurality of coils (654), described coil limits a plurality of magnetic poles by power supply, and
Described a plurality of magnetic pole is changed on the sense of rotation of described rotor (450,550,650) by the described electricity supply of control.
19. an electric notor (413) comprising:
Stationary part (430), described stationary part has the inner circumference limit; And
Rotor (450,550,650), described rotor can rotate around described inner circumference limit,
Wherein said rotor (450,550,650) comprises axle (452) and resin part (454,556,656),
Described axle (452) has the outer annulus edge (453) of the projection of limiting (600),
Described resin part (454,556,656) is by forming the injection moulding of one of resin and composite, and described composite comprises resin, and
Described resin part (454,556,656) covers described projection (600).
20. electric notor according to claim 19 (413) is characterized in that, described projection (600) limits on the whole circumference of described outer annulus edge (453).
21. according to claim 19 or 20 described electric notors (413), it is characterized in that described projection (600) comprises projection (602), described projection is outstanding in the radial direction described axle (452).
22., it is characterized in that described resin part (454,556,656) is the permanent magnet (454,554) that is formed by the composite that includes resin and magnetic material according to claim 19 or 20 described electric notors (413).
23., it is characterized in that described rotor (450,550,650) comprises the permanent magnet (454,554) that offers described resin part (454,556,656) according to claim 19 or 20 described electric notors (413).
24. according to claim 19 or 20 described electric notors (413),
It is characterized in that the described resin part (454,556,656) of described rotor (450,550,650) comprises a plurality of coils (654), described coil limits a plurality of magnetic poles by power supply, and
Described a plurality of magnetic pole is changed on the sense of rotation of described rotor (450,550,650) by the described electricity supply of control.
CNB2006101290524A 2005-09-06 2006-09-05 Fluid pump and motor and method for manufacturing same Expired - Fee Related CN100467850C (en)

Applications Claiming Priority (6)

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JP257416/2005 2005-09-06
JP2005257416 2005-09-06
JP302698/2005 2005-10-18
JP315974/2005 2005-10-31
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JP171173/2006 2006-06-21

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CNB2006101290505A Expired - Fee Related CN100425822C (en) 2005-09-06 2006-09-05 Fluid pump having bearing hole
CN2008101689976A Active CN101368534B (en) 2005-09-06 2006-09-05 Fluid pump, electric motor, and manufature method thereof
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CNB2006101290492A Active CN100552209C (en) 2005-09-06 2006-09-05 Fluid pump with housing

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CN109217516A (en) * 2018-11-08 2019-01-15 珠海格力电器股份有限公司 Central spindle, rotor, motor and lathe

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CN101368534A (en) 2009-02-18
CN100467850C (en) 2009-03-11
CN100425822C (en) 2008-10-15
CN101368534B (en) 2011-07-13
CN100552209C (en) 2009-10-21
CN1928347A (en) 2007-03-14

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