CN1262395A

CN1262395A - Pump device

Info

Publication number: CN1262395A
Application number: CN99121085A
Authority: CN
Inventors: 弓田行宣
Original assignee: Nidec Sankyo Corp
Current assignee: Nidec Sankyo Corp
Priority date: 1999-01-22
Filing date: 1999-10-07
Publication date: 2000-08-09
Anticipated expiration: 2019-10-07
Also published as: KR100356062B1; JP2000213491A; JP3769138B2; CN1263956C; KR20000052338A

Abstract

To reduce noises, improve durability, reduce the number of part items, assembling steps and thereby a cost of a pump device. Fluid is fed by rotating an impeller 15 attached to an output shaft 2 of a motor. Bearing devices 20, 21 rotatably journalling the output shaft 26 and a stator core 27 of the motor are supported by a part of each of casings 11, 14 composing a pump part of a pump device. A seal member 18 seals around the output shaft 26, and prevents fluid leakage from an impeller chamber 37 surrounding the impeller 15. A water shielding plate 19 prevents fluid leaked from a portion of the seal member 18 from flowing out to a motor driving side. The seal member 18 and the water shielding plate 19 are arranged coaxially with the output shaft 26. An outer diameter of the water shielding plate 19 is smaller than an inner diameter of the seal member 18. A lead wire 32 for supplying current to the motor is sandwiched and fixed by a part of each of the casings 11, 14 and a motor side casing 23 covering a motor driving part.

Description

Pump-unit

The present invention relates to pump-unit, relate in particular to the pump-unit that is suitable for bathtub usefulness pump (バス Port Application プ) in the washing machine.

Existing washing machine, for example in automatic washing machine, as at the fluid of washing position suction washing usefulness, be the fluid pump of pump up water, a kind of fluid pump with bathtub that suction supplies with to the washing position with pump is for example arranged.This bathtub pump constituted pump-unit by pump component is installed in the past on the direct current brushed motor.The pump-unit of such existing structure is disclosed in for example Japanese patent of invention and discloses 1996 No. 135590 communique and Japanese patent of invention and disclose on 1998 No. 196582 communique.

Japan's patent of invention disclose the existing pump-unit that No. 135590 communiques in 1996 etc. are disclosed, and forms integrated structure in the pump case owing to the motor of monomer structure is loaded into, so the output shaft of motor and impeller are difficult to axes alignment.If axes alignment is insufficient, then produces noise and become shortcomings such as big, the durable time shortens.In addition, owing to for keeping motor to need other part, so more than becoming when becoming the rigger and pump-unit at high price.

In addition, existing pump-unit, though use the direct current brushed motor, this electric tools has following shortcoming.

1) brush wear, durability is bad.

2) produce electrical noise because of spark.

3) can not complete closed owing to there is brush, so the into danger of water is arranged,, just produce electric short circuit etc. in case suppose water inlet, become the pump-unit of danger.

4) partly produce noise from brush or commutator.

Therefore, the objective of the invention is to, a kind of pump-unit that is difficult to produce noise and durability is improved is provided.In addition, another object of the present invention is to, reduce and the cheap pump-unit of cost when a kind of part number and rigger are provided.

For achieving the above object, pump-unit of the present invention, be a kind ofly on the output shaft of motor, to have impeller, drive the pump-unit that this impeller is sent fluid, be characterized in, support with the pump case part of the formation pump portion of pump-unit and rotate the bearing of the described output shaft of ground axle suspension freely by rotation.Thus, the output shaft of motor and impeller are difficult to produce noise with regard to carrying out the good centering of precision easily, thereby become the also good pump-unit of durability.

In addition, in another invention, also use the stator core of pump case part supporting motor.Thus, because of as support, the also shared pump case of the stator core of motor so reduced the part number, can be made inexpensive pump.

In addition, in another invention, it is a kind of pump-unit that on the output shaft of motor, has impeller, sends fluid by this impeller of rotation driving, be characterized in, prevent fluid from the sealing component that leaks to motor side around the blade wheel chamber of impeller with prevent the plate that dewaters of the direction of flow motoring side that spills from the sealing member with the coaxial setting of output shaft, the external diameter of the plate that dewaters is less than the internal diameter of sealing component.Therefore, the plate that can dewater by the installed inside of described sealing component, assembling improves.

In addition, in another invention, it is a kind of pump-unit that on the output shaft of motor, has impeller, sends fluid by this impeller of rotation driving, be characterized in, grip the lead that is used for to the motor power supply with the motor side housing that covers motoring portion by the housing that constitutes pump portion of this pump-unit is a part of.Thus, reliable and easy fixing cord.

In addition, form described housing, can prevent that then motor temperature from rising if in resin, sneak into the thermal conductivity material also more excellent than resin monomer.In addition, if motor is made 3 phase brushless motors and for external rotor type, then can further be reduced noise, also can further improve durability.

Fig. 1 is the longitudinal section of the example of expression pump-unit of the present invention.

Fig. 2 is the plan view of the example of expression pump-unit of the present invention.

Fig. 3 is the right elevation of the example of expression pump-unit of the present invention.

Fig. 4 is the left view of the example of expression pump-unit of the present invention.

Fig. 5 is the wiring diagram of the motor part of pump-unit of the present invention.

Fig. 6 is the electrical block diagram of the washing machine of built-in pump-unit of the present invention.

Fig. 7 is that the washing machine by Fig. 6 washs the flow chart of action when (comprising the dehydration action).

Fig. 8 is that the washing machine by Fig. 6 carries out the flow chart of pump when driving.

Fig. 9 is the longitudinal section of the change example of expression pump-unit of the present invention.

Below, just the example of pump-unit of the present invention describes in conjunction with Fig. 1 to Fig. 9.Fig. 1 is the longitudinal section of pump-unit of the present invention, and Fig. 2 is its plan view, and Fig. 3 is its right elevation, and Fig. 4 is its left view.

Pump-unit of the present invention is characterized in, be not to resemble to assemble the pump that is made of each part and the structure of motor the prior art, but pump and motor is integrative-structure.

Pump-unit of the present invention is the bathtub pump as fluid pump that is in the aftermentioned washing machine 1 of packing into, is to be self-priming pump-unit in illustrated embodiment.The pump portion of this pump-unit comprises: pump side housing 11; The one-way valve 12 that ends with the part card of pump side housing 11 inwalls; Be entrenched in the lid 13 of pump side housing 11 inwall 11a peripheries; The opposing party's who combines with described pump side housing 11 pump side housing also constitutes the middle casing 14 of impeller with housing; Rotation is bearing in the resinous impeller 15 on the middle casing 14 freely; Be formed on the blade part 16 on the impeller 15; Pipe (slip ring) 17; Oil sealing 18 as the rubber system of sealing component; And the plate 19 that dewaters.

In addition, the motor part of pump-unit comprises: be installed in the radial bearing 20 and 21 on the middle casing 14; Thrust washer 22; The motor side housing 23 that combines with middle casing 14; Magnet rotor 24; Rotor case 25; The running shaft 26 that becomes motor output shaft (running shaft) of double as impeller 15 running shafts; Stator core 27; Drum 28; Winding 29; Substrate 30; Hall element IC31; And lead 32.Described radial bearing 20 and 21 is installed on the middle casing 14, and these middle casing 14 double as impellers are with housing and constitute retainer.

With pump side housing 11 with become in the pump portion that impeller surrounded with the middle casing 14 of housing, be provided with: the inlet hole 33 of liquid or air intake impeller chamber 37 usefulness; By the formed water sucking mouth 34 of pump side housing 11 inwalls, suction chamber 35 and discharge chamber 36; Inwall and lid 13 formed blade wheel chamber 37 by middle casing 14; Prevent Sealing 38, the exhaust port 39 of leak of liquid; And the water filling hole 40 that injects the self-priming water.

As shown in Figure 4, pump side housing 11 and middle casing 14 are fastened and by integrated with screw 41, and as shown in Figure 3, and pump side housing 11, middle casing 14 and motor side housing 23 usefulness screws 42 are fastened and by integrated.

Middle casing 14 has: extend the extension part 14a cylindraceous that constitutes blade wheel chamber 37 with housing and retainer for constituting impeller in pump side housing 11 side direction; From the extension part 14a oil sealing 18 that forms that stretches out the extension part 14b cylindraceous of usefulness is installed; The extension part 14c cylindraceous that becomes the stator core support that extends again, external diameter is supported less than retainer and the stator core of extension part 14b from extension part 14b.

As mentioned above, the extension part 14c of middle casing 14 is retainer and stator core support, at the outer circumferential face of extension part 14c, is fixed with the stator core group that constitutes external-rotor motor.The stator core group comprises: a plurality of salient pole portion is to the stator core 27 of the stepped construction of the side-prominent formation of periphery; Be installed in the winding drum 28 in the described salient pole portion; Separately be wound on winding 29 on the winding drum 28; Be installed in the circuit substrate that is electrically connected usefulness 30 on the drum 28; The Hall element IC31 and the lead 32 of installation or wiring on this circuit substrate 30.This stator pack is inserted earlier the extension part 14c of middle casing 14 from lead 32 sides, by the stator core 27 and the location of the stator core that forms on extension part 14c are located with end difference 14e butt, and with joint methods such as ultrasonic welding it is fixed.

On the other hand, on the inwall of extension part 14c, be fixed with radial bearing 20 and 21 as bearing means with joint method such as being pressed into.Thereby the extension part 14c of middle casing 14 not only becomes the fixing part of the stator core group in the motor part, and, also have the effect of the retainer of motor part concurrently.

In addition, at the inwall of the extension part 14b of middle casing 14 and be located between the pipe 17 on the impeller 15 wheel hub 15a peripheries, wait joint method fixedly to pack into to prevent that fluid is from the oil sealing 18 as sealing component of blade wheel chamber to the motor side leakage with being pressed into.

On radial bearing 20 and 21, extend to always connect till the extension part 14b of middle casing 14 be inserted with also as impeller 15 running shafts the running shaft 26 of rotor set.In an end of this running shaft 26, insert fixedly thrust washer 22 and rotor set (being constituted) by the rotor case 25 of installation rotor magnet 24 with the running shaft 26 of these rotor case 25 one.From with the direction of insertion opposition side of this rotor set, insert impeller sets (comprise impeller 15, from impeller 15 coniform extend ground integrally formed and have mounting hole impeller hub 15a, pipe 17, be pressed near the plate 19 that dewaters the front end of impeller hub 15a), and utilize and method such as be pressed into and be fixed on the running shaft 26 of rotor set.As mentioned above, running shaft 26 is the output shaft (running shaft) of motor, is again the running shaft of impeller.

In addition, under situation about impeller sets being pressed on the end that is fixed on running shaft 26, as long as, just can strengthen combination being pressed into behind the formation annular knurl on the running shaft 26 of fixing impeller hub 15a.

The motor of said structure constitutes three-phase DC brushless motor, shown in the wiring diagram of Fig. 5, winding 29 star connections, be made of winding A, the B and the C that supply with three-phase voltage, 3 Hall element IC31 are configured in respectively between winding A, B and the C, supply with DC electrical source (for example 5 volts).

Be installed in pipe 17 on the impeller hub 15a and be wearing and tearing usefulness that contacting of the resin system impeller 15 wheel hub 15a that prevent rubber system oil sealing 18 and rotation produced, can use the material of oil sealing 18 and have the material of difference of hardness to a certain degree, for example use stainless steel in this example, integrated with embedding forming method etc. with impeller 15 and impeller hub 15a.

Oil sealing 18 is coaxial with running shaft 26, and remains on the extension part 14b of housing 14, is to be used for preventing that water or other fluid from being the sealing component that blade wheel chamber's 37 side direction motor sides leak from pump side.In addition,, arrive and be pressed into the plate 19 that dewaters that is installed on the impeller hub 15a,, splash by centrifugal force by the rotation of this plate 19 that dewaters taking place for example to be delivered to the fluid of impeller hub 15a tapered segment under the situation that can not prevent to leak from pipe 17 with oil sealing 18.

Dewater the external diameter of plate 19 less than the internal diameter of oil sealing 18.This is because in the time of on the running shaft 26 of the impeller hub 15a of impeller sets being packed into connect inserting oil sealing 18 central holes, it being connected insert easily.On middle casing 14 and motor side housing 23, offer dewatering

orifice

14d, 23a, the water that spills can be discharged from this

dewatering orifice

14d, 23a.

Motor side housing 23 is the structures that are the rotor part that covers external-rotor motor, constitutes common motor case.This motor side housing 23 is when combining with pump side housing 11 and middle casing 14, by fastening jointly of three in oneization fixed by screw, the more important is that this motor side housing 23 does not keep the running shaft 26 as motor reel is given the radial bearing 20 and 21 of axle supporting.With in this three in oneization fixing, grip lead 32 by middle casing 14 and motor side housing 23.

In said structure, on the

extension part

14b and 14c that forms extending middle casing 14, fix, maintain oil sealing 18 and rotation give axle supporting freely to running shaft 26 radial bearing 20 and 21 and stator core 27, since this

extension part

14b and 14c can be made middle casing 14 and carry out mold pressing with concentric integrally formed, so guarantee the concentricity of above-mentioned each part easily.

Below, describe with regard to the working principle of the pump-unit of said structure.

At first, supply with starting water from water filling hole shown in Figure 2 40, whether suction chamber 35, discharge chamber 36 and blade wheel chamber 37 are filled with by starting water, and blade wheel chamber 37 is filled with by the starting water at least.Then, guiding line 32 power supplies, starting motor, running shaft 26 produces rotation, thus impeller 15 also is driven in rotation, and is the self-priming operating condition.

Suction chamber 35 becomes negative pressure because of the rotation of impeller 15, and one-way valve 12 is opened, and sucks air by the soft suction hose (not shown) that is connected with water sucking mouth 34.And mixed air and water or air are from inlet hole 33 intake impellers 15.Thus, air mixes with water, discharges to discharging chamber 36 by blade wheel chamber 37.At this moment, lighter airtrapping is discharged from exhaust port 39 then on the top of discharging chamber 36.Like this, by impeller 15 to discharging in the middle of the starting water of discharging chamber 36 and the air, only air is from exhaust port 39 discharges.In a single day air is discharged from, and water just rises in soft suction hose gradually.

Then, the air in the soft suction hose all is discharged from, and when being filled with by water in the soft suction hose, is transformed into stable water supply operating condition from the self-priming operating condition, discharges from exhaust port 39 continuously from the water of water sucking mouth 34.

As mentioned above, be illustrated with regard to example of the present invention, but the invention is not restricted to this, can do various distortion, application.For example, be to be set as self-priming pump in example, but be not limited thereto, can use general pump.

In addition, also the usable resins monomer is as the material of each

housing

11,14,23, but for the temperature that contains glass PBT resin and motor part of the glass that prevents to sneak into the material also harder than resin monomer rises, also can use the material of thermal conductivity than resin monomer excellence, for example, use the composite material of sneaking into later salic PPS resin of aluminium oxide and so on.In addition, make the structure of mold pressing motor, also can alleviate temperature and rise, improve waterproofing effect by partly utilize the good resin of potting method filling pyroconductivity in stator core.

In addition, in this example, motor part is outer-rotor structure, but also can make inner rotor core.And also can not make the three-phase brushless motor that uses Hall element, but make the sensorless motor that utilizes counterelectromotive force (the contrary Electricity of rising presses) etc.In addition, the present invention also is applicable to charged brush motor same as the prior art.

Below, describe in conjunction with Fig. 6 to Fig. 8 with regard to the washing machine 1 of the pump-unit of the present invention of built-in above-mentioned explanation.

Fig. 6 is the electrical block diagram of washing machine.Washing machine 1 has: the transducer portion 3 that is connected with DC electrical source 2; The control circuit 4 that constitutes by microcomputer etc.; Become the body motor 5 of washing with motor; The bathtub that becomes pump motor is with pump motor (quite from Fig. 1 to Fig. 5 pump-unit) 6; Become the motor throw over switch 7 of the 1st switch gear; Become the position detecting device throw over switch 8 of the 2nd switch gear.Here, form control device by transducer portion 3 with control circuit 4.

DC electrical source 2 is with rectification circuit (not shown) rectification to be carried out in the mains ac power supply and supply with the DC electrical source of VDC.Transducer portion 3 is made of 6 motor controling switch (element) 3a, 3b, 3c, 3d, 3e and the 3f that are connected with DC electrical source 2.Between DC electrical source 2 and ground connection, 2 motor controling switch 3a and 3b are being connected in series.Equally, between DC electrical source 2 and ground connection, motor controling switch 3c and 3d and motor controling switch 3e and 3f are being connected in series.6 motor controling switch 3a, 3b, 3c, 3d, 3e and 3f are connected as mentioned above, and constitute the three-phase bridge structure.

Body motor 5 is made of the three-phase direct-current brushless motor with Hall element IC detecting apparatus for rotor position such as (intergrated circuit that comprises the Hall element of position-detection sensor), is that the washing member (not shown) to the washing blade that is located at the washing position or washing tube etc. is driven usefulness.

Bathtub is the motor that have with body motor 5 same structures with pump motor 6, is made of the three-phase direct-current brushless motor with detecting apparatus for rotor position such as Hall IC.This bathtub pump motor 6, thus the bathtub that becomes fluid pump that the hot water or the cold water suction of bathing pool are supplied with to the washing position is driven usefulness with pump.

Motor throw over switch 7 connects switch by 3 and constitutes, and has common terminal 7a, 7b and 7c and contact 7d, 7e, 7f, 7g, 7h and 7i.Common terminal 7a, the 7b of motor throw over switch 7, and 7c be connected with tie point A, the motor controling switch 3c of motor controling switch 3a and 3b and tie point B, the motor controling switch 3e of 3d and the tie point C of 3f respectively.Contact 7d, the 7f of motor throw over switch 7 and 7h are connected with 3 staor winding (not shown) of body motor 5 respectively.Equally, contact 7e, the 7g of motor throw over switch 7 and 7i are connected with 3 staor winding (not shown) of bathtub with pump motor 6 respectively.

Position detecting device throw over switch 8 connects switch by 3 and constitutes, and has common terminal 8a, 8b and 8c and contact 8d, 8e, 8f, 8g, 8h and 8i.Common terminal 8a, the 8b of position detecting device throw over switch 8 and 8c are connected with control circuit 4.Contact 8d, the 8f of position detecting device throw over switch 8 and 8h are connected with the detecting apparatus for rotor position of body motor 5 respectively, and contact 8e, 8g and 8i are connected with the detecting apparatus for rotor position of bathtub with pump motor 6 respectively.

By the control circuit 4 that microcomputer etc. constitutes, follow the washing of storing in advance with program and fluid pump running program and move by built-in storage.To control circuit 4, import from body motor 5 and bathtub position signal with the position detecting device of pump motor 6 by position detecting device throw over switch 8.In addition, control signal is supplied with and connect, disconnected to control circuit 4 to each motor controling switch 3a of transducer portion 3～3f, and supply with the changeover control signals conversion that links to motor throw over switch 7 and position detecting device throw over switch 8.

Below, the working principle of this washing machine 1 is described according to the flow chart of Fig. 7 and Fig. 8.

When washing machine 1 power connection (S1), switch 7 and switch 8 are switched to body motor 5 sides.Control circuit 4 begins to wash the action (S3) of the program of using according to setting operation actuation time (S2) of the current throw over switch operation of for example washing machine or dewater switching manipulation and timer, and to transducer portion 3 supply control signals, thereby each motor controling switch 3a～3f is connected, disconnects control (S4).

Each motor controling switch 3a～3f of transducer portion 3 becomes three-phase frequency/voltage waveform by connecting, disconnect control from the control signal of control circuit 4 with the voltage transformation of DC electrical source 2.Voltage after the conversion is supplied with by switch 7 and to each staor winding of body motor 5 from each tie point A, B of motor controling switch and C.

In addition, position signal from the position detecting device of body motor 5 is transfused to control circuit 4 by switch 8, control circuit 4 is supplied with the control signal that the switch of motor controling switch 3a～3f is regularly controlled according to the position signal of being imported, and body motor 5 carries out positive and negative rotation (S5) by the rotational speed that depends on the three-phase voltage waveform.

Utilize the rotation of body motor 5 and drive the washing member (S6) of washing blade or washing tube etc. with the rotational speed of required water velocity or dehydration usefulness, if EOP end of program (S7), then a series of operation just finishes.

Then, as shown in Figure 8, use bathtub with under the situation of pump, behind power connection (S1), connect and be used for driving bathtub (S11) with the operating switch (not shown) of pump in desire.So control circuit 4 makes the running of pump running program, supply with switching signal to switch 7 and switch 8, make two switches 7,8 change (S12) with pump motor 6 sides from body motor 5 side direction bathtubs.

Then, the running (S13) of control circuit 4 beginning pump running programs, and will be suitable for the control signal supply transducer portion 3 that bathtub drives with pump, thus each motor controling switch 3a～3f is connected, disconnects control (S14).

Each motor controling switch 3a～3f of transducer portion 3 becomes to have to be suitable for the three-phase voltage of bathtub with the frequency/voltage of pump driving by connecting, disconnect control from the control signal of control circuit 4 with dc voltage conversion.Three-phase voltage after the conversion is supplied with each staor winding of pump motor 6 by switch 7 and to bathtub from each tie point A, B of motor controling switch and C.

In addition, from the position signal of bathtub with the position detecting device of pump motor 6, from the contact 8e of switch 8 by common terminal 8a, from contact 8g by common terminal 8b, from contact 8i by common terminal 8c and to control circuit 4 inputs.

Thus, bathtub rotates (S15) with pump motor 6 by the rotational speed that depends on three-phase voltage.Bathtub is far longer than the rotational speed of body motor 5 with the rotational speed of pump motor 6, is about 7,000～10,000 rev/mins.

The bathtub that is connected with the rotor of motor 6 utilizes bathtub to be driven (S16) with the rotation of pump motor 6 with pump.Aspirate the hot water of bathing pool thus, supply with the washing that washing tube is used for washing.

When stopping bathtub and use pump, be used for driving the operating switch (S18) of bathtub if disconnect with pump, then control circuit 4 is transformed into body motor 5 sides (S19) with switch 7 and switch 8 again.Thus, be cut off from the three-phase voltage of transducer portion 3 and stop bathtub with pump motor 6 (S20).

Above, the application examples of example and this pump-unit of pump-unit of the present invention has been described, but has the invention is not restricted to this, in breaking away from the scope of its aim, can not do various distortion.For example, as shown in Figure 9, also can be and make the impeller that becomes the opposing party's pump side housing 2 members formation housings, the bottom of sealing impeller motor field frame 51 with lid 52 with housing and the integrated impeller motor field frame 51 that forms of motor side housing with side's pump side housing 11.

In this variation, identical point is, also on middle casing 14 as impeller motor field frame 51, on the

extension part

14b and 14c that forms in that middle casing 14 is extended, fix, maintain oil sealing 18, running shaft 26 is rotated a radial bearing 21 and a stator core 27 that gives the axle supporting freely, the extension part 14c of middle casing 14 not only becomes the fixing part of stator core group in the motor part, and plays the effect as the retainer of motor part.

In addition, in the symbol in Fig. 9, with Fig. 1 to the identical expression identical components of symbol shown in Figure 4.

In addition, the pump that pump-unit of the present invention is also used applicable to bathtub only except washing machine, or be applicable to pump up water usefulness from pond and river, or be applicable to various uses and equipment.

As mentioned above, pump-unit of the present invention has: the pump case of the formation pump portion of this pump-unit; The retainer that constitutes by this pump case; The described output shaft that remains on this retainer is carried out the bearing that axle supports, output shaft owing to the bearing that keeps by the described retainer that is made of described pump case to described motor supports, so guarantee that easily motor output shaft and impeller are concentric, so that the bearing means that motor output shaft is used remains on the pump case.

In addition, if on described retainer, constitute the stator core support of the described motor stator-core of supporting in advance, then can make simplifying the structure of motor part and impeller portion.

In addition, pump-unit of the present invention has: the pump case of the formation pump portion of this pump-unit; The stator core of the described motor that is made of this pump case is supported the stator core support of usefulness; Be installed in the stator core of the described motor on this stator core support, because the stator core that the stator core support that is made of described pump case keeps described motor, so can make the pump-unit that simplifies the structure that makes motor part and impeller portion.

In addition, if described pump case is formed the impeller housing, and the impeller housing is around described impeller and the formation blade wheel chamber that constitutes uses, the stator core or the stator core group that then can keep described motor with housing by impeller, thereby can make simplifying the structure of pump-unit, and can guarantee the concentric of impeller and motor output shaft easily.

Again, on the periphery of the described output shaft of pump-unit of the present invention, prevent that with the coaxial setting of output shaft fluid is from the sealing component that leaks to described motor side around blade wheel chamber that impeller constituted with prevent the plate that dewaters of the direction of flow motor side that spills from the sealing member, the external diameter of the described plate that dewaters is less than the internal diameter of described sealing component, because by the described plate that dewaters of the installed inside of described sealing component, so make pump-unit easily.

Have again, because pump-unit of the present invention is the structure that the lead that is used for to the motor power supply is gripped by the housing part that constitutes pump portion of this pump-unit and the motor side housing that covers described motoring portion, so can make the pump-unit of reliable and easy fixing cord.

Claims

1. pump-unit is a kind ofly to have the impeller sending fluid and use on the output shaft of motor, rotate by the output shaft that utilizes described motor and drive the pump-unit that this impeller is sent fluid, it is characterized in that,

The retainer that has the housing of the formation pump portion of this pump-unit, is made of this pump case, the bearing that the described output shaft that remains on this retainer is carried out the axle supporting, the bearing that keeps by the described retainer that is made of described pump case supports the output shaft of described motor.

2. pump-unit as claimed in claim 1 is characterized in that, described impeller is installed on the output shaft of described motor.

3. pump-unit as claimed in claim 2 is characterized in that, described retainer is formed with the stator core support that the stator core of described motor is supported.

4. pump-unit as claimed in claim 3 is characterized in that, the outer circumferential face of described retainer is formed described stator core support, and be formed with the location end difference of described stator core on described stator core support.

5. pump-unit as claimed in claim 3 is characterized in that, sneaks into thermal conductivity than the material of this resin monomer excellence and form described pump case in resin.

6. pump-unit as claimed in claim 1 is characterized in that, the impeller housing that described pump case is used as the formation blade wheel chamber that constitutes around described impeller.

7. pump-unit as claimed in claim 6 is characterized in that, on coaxial with described output shaft, be provided with by described impeller with housing supporting, prevent the sealing component of fluid from leaking to described motor side around the blade wheel chamber that impeller constituted.

8. pump-unit is a kind ofly to have the impeller sending fluid and use on the output shaft of motor, rotate by the output shaft that utilizes described motor and drive the pump-unit that this impeller is sent fluid, it is characterized in that,

Have the formation pump portion of this pump-unit pump case, to the stator core of the described motor that constitutes by this pump case supported usefulness the stator core support, be installed in the stator core of the described motor on this stator core support, the stator core that the stator core support that is made of described pump case keeps described motor.

9. pump-unit as claimed in claim 8 is characterized in that, the impeller housing that described pump case is used as the formation blade wheel chamber that constitutes around described impeller.

10. pump-unit as claimed in claim 8 is characterized in that, described motor is three-phase brushless motor and is external rotor type.

11. pump-unit as claimed in claim 8 is characterized in that, sneaks into thermal conductivity and refer to the material of monomer excellence and form described pump case than this tree in resin.

12. a pump-unit is a kind ofly to have the impeller sending fluid and use on the output shaft of motor, rotate by the output shaft that utilizes described motor and drive the pump-unit that this impeller is sent fluid, it is characterized in that,

On the periphery of described output shaft, prevent that with coaxial being provided with of described output shaft fluid is from the sealing component that the blade wheel chamber that constitutes leaks to described motor, preventing the plate that dewaters that flows to motor side from the fluid that the sealing member spills around described impeller, the external diameter of the described plate that dewaters is less than the internal diameter of described sealing component, by the described plate that dewaters of the installed inside of described sealing component.

13. a pump-unit is a kind ofly to have the impeller sending fluid and use on the output shaft of motor, rotate by the output shaft that utilizes described motor and drive the pump-unit that this impeller is sent fluid, it is characterized in that,

Grip lead by the pump case that constitutes pump portion of this pump-unit and the motor side housing that covers the drive portion of described motor to described motor power supply usefulness.