CN101238284B

CN101238284B - Fuel pump

Info

Publication number: CN101238284B
Application number: CN200680023879.5A
Authority: CN
Inventors: 鵤木孝夫; 堀底伸一郎; 叶山惠三; 伊藤克敏; 本间文司; 岩本秀幸; 成岛雅彦
Original assignee: Honda Motor Co Ltd; Mitsuba Electric Manufacturing Co Ltd
Current assignee: Honda Motor Co Ltd; Mitsuba Corp
Priority date: 2005-07-06
Filing date: 2006-07-05
Publication date: 2013-02-06
Anticipated expiration: 2026-07-05
Also published as: WO2007004676A1; BRPI0612100B1; BRPI0612100A2; CN101238284A; JP4939412B2; JPWO2007004676A1

Abstract

The invention provides a fuel pump arranged on the bottom edge of a fuel tank, which comprises a pump part embedded at the lower portion of a housing and a motor part embedded at the upper portion of the housing and used for driving the pump part. The motor part is provided with an armature and an upper bracket. The armature is provided with an armature shaft. The upper bracket rotatably supports the armature. The pump part is provided with a lower bracket, a pump holder and an impeller. The lower bracket rotatably supports the armature to form an annular recess. The pump holder abuts against the lower bracket to form an annular recess. The impeller is in a pump chamber formed between the lower bracket and the pump holder and is fixed onto the armature shaft. Along with the rotation of the armature, the impeller is rotated. A fuel inhaling part and a fuel discharge part are formed on the pump holder. The fuel inhaling part communicated with the annular recess of the pump holder runs all through in the up-down direction and inhales fuel into the pump part. The fuel discharge part also communicated with the annular recess of the pump holder runs all through in the up-down direction and is protruding downwardly so as to discharge fuel towards a fuel guide way. The impeller inhales fuel into the pump part through the fuel inhaling part.

Description

Petrolift

Technical field

The invention belongs to the technical field of the petrolift in the vehicles such as being equipped on two-wheeled motorcycle.

Background technique

Usually, in the petrolift that consists of this for motor vehicle fuel supplying device, have plenty of (in-tank) formula in the case, the petrolift of formula is constituted as petrolift is arranged on the base of fuel tank in this case, so that drive under the state of petrolift in being immersed in fuel.In the case, petrolift is pump section being configured in the below of the housing of tubular, the motor part of driven pump section is configured in the mode of the top of housing consists of, even so that the fuel in the fuel tank tail off also can feed fuels.

But, as the motor part that is used for petrolift, some use electric motors, the structure that this motor adopts is, is provided with commutator at motor drive shaft, provides external power supply via the brush with this commutator sliding contact, makes thus the motor drive shaft rotation.In such structure, the fuel discharge portion is arranged on motor part side (patent documentation 1).

And, when the petrolift that will adopt such motor part is assembled on the fuel supplying device of inner container formula, because the fuel discharge portion is to arrange with the state towards the top, so be to use the pipe arrangement that is connected with discharge portion, in fuel tank, be drawn out to the outside, and be directed to and start pusher side (patent documentation 2).

Patent documentation 1: Japanese kokai publication hei 10-47291

Patent documentation 2: the special public table 2003/044357 of Japan

Summary of the invention

But in above-mentioned existing petrolift, the fuel discharge portion is arranged on the motor part side, is inhaled into the stream of the fuel in the housing, be through the inside of the housing of petrolift, namely through between the rotor that formation motor part and the housing to the carriage of motor part side.Therefore, must guarantee the stream of fuel between the periphery of the permanent magnet in the interior week that is configured in housing and rotor, Just because of this, at the compactness of motor part, namely the compactness aspect of petrolift exists the problem that is limited to a certain extent.

And when the petrolift that will have such motor part is assembled on the fuel supplying device of formula in the case, discharge portion will be positioned at fuel tank with the posture towards the top.Therefore, guide to the pipe arrangement that starts pusher side for being used for from discharge portion, must be with the top in fuel tank be drawn out to after outside pipe arrangement to start the pusher side circle around.Therefore, fuel flow path is via elongated inside and outside the fuel tank, the pressure loss increases, like this, not only there is the problem that the output power of petrolift must be increased and damage the compactness of petrolift, need to be used for being communicated with the inside and outside pipe arrangement of fuel tank but also exist, number of components increases, and fuel supplying device maximizes and baroque problem.These problems are problems to be solved by this invention.

The present invention carries out in view of above-mentioned actual conditions and for solving above-mentioned problem, technological scheme 1 described invention is a kind of petrolift, it is characterized in that, described petrolift is arranged on the base of fuel tank, by the pump section of the bottom that is contained in housing in the quilt and by in be contained in housing top consist of with the motor part of driven pump section, described motor part possesses armature and upper lateral bracket, and this armature possesses armature shaft, the described armature of lateral bracket rotatably support on this; Described pump section possesses lower bracket, pump bracket, impeller, the described armature of this lower bracket rotatably support has also formed annular recessed portion, this pump bracket is connected to this lower bracket and has formed annular recessed portion, this impeller is configured in the pump chamber that is formed between described lower bracket and the described pump bracket, and be fixed on the described armature shaft one rotation with the rotation of described armature; On described pump bracket, fuel sucting and fuel discharge portion have been formed, this fuel sucting connects at above-below direction with the state that is communicated with the annular recessed portion of described pump bracket, suck fuel to described pump section, this fuel discharge portion connects at above-below direction with the state that is communicated with the annular recessed portion of described pump bracket, and outstanding downwards, fuel is discharged to the fuel guiding road of starting the pusher side guiding from described pump section to being used for, described impeller sucks fuel through described fuel sucting in described pump section, supply with the fuel of described suction to described fuel discharge portion as stream take the annular recessed portion of the annular recessed portion of described lower bracket and described pump bracket, the fuel that is fed into this fuel discharge portion starts the pusher side guiding through described fuel guiding road direction.

Technological scheme 2 described inventions are according to technological scheme 1 described petrolift, wherein, have consisted of described motor part by the electric motor of electric brush type.

The effect of invention

According to technological scheme 1 described invention, not only can make the petrolift compactness, shorten to the pipeline that starts the pusher side configuration, and can make simple structure.

According to technological scheme 1 described invention, can realize that number of components reduces, the purpose of designs simplification, on the other hand, can stablize and provide fuel to petrolift reliably.

According to technological scheme 1 described invention, can simplify and lead to the flow passage structure that starts pusher side, can realize the miniaturization of fuel supplying device.

According to technological scheme 2 described inventions, can further realize the purpose of the designs simplification of fuel supplying device, realize compactness.

Description of drawings

Fig. 1 is the sectional front view of petrolift.

Fig. 2 is the stereogram of dividing plate.

Symbol description:

1: petrolift

2: fuel tank

2a: base

2b: through hole

3: yoke

5: armature

5a: armature shaft

6: commutator

7: brush

8: permanent magnet

9: lower bracket

10: pump bracket

10c: fuel sucting

10d: fuel discharge portion

11: impeller (impeller)

13: the pump support unit

13c: support plate

13f: fuel supplying part

13g: fuel guiding road

14: dividing plate

15: fuel filter

17: pressure regulation device

Embodiment

Below, with reference to the accompanying drawings, embodiments of the present invention are described.

In the drawings, symbol 1 expression consists of the petrolift of fuel supplying device, and this petrolift 1 is by the base 2a side that is in fuel tank 2 and is positioned at the P of pump section of below and the motor part M of the top of the P of this pump section consists of under the state that is installed on the fuel tank 2 described later.The M of said motor section and the P of pump section comprise the yoke cylindraceous 3 that consists of housing of the present invention, cylinder end face in these yoke 3 upper end portions has formed upside end difference 3a, on this upside end difference 3a, hold back the periphery edge of the upper lateral bracket 4 of the ring-type that is connected to the upper end portion that consists of housing.

Symbol 5 expressions consist of the armature of motor part M.Consist of the upper end of armature shaft (motor drive shaft) 5a of this armature 5, be supported in rotationally and be arranged with on the bearing portion 4a of the axle core of upper lateral bracket 4.And then, in the upper end portion of above-mentioned armature shaft 5a, be embedded with commutator 6 outward integratedly, but this commutator 6 is constituted as on the outer circumferential face of resinous annulus 6a along the circumferential structure that is provided with the commutator segment 6b of a plurality of electric conductivity.On the other hand, the lower end surface of lateral bracket 4 on above-mentioned, formed in the circumferential direction of the circle a pair of brush supporting base 4b, on this brush supporting base 4b, dispose respectively to internal side diameter and be carried out the brush 7 that loads, the internal side diameter front-end face of each brush 7 is configured to and can contacts with commutator segment 6 with being elasticity pushing shape.In addition, below the outer embedding of the commutator 6 on armature shaft 5a section, multi-disc ring-type core 5b in integratedly outer embedding, in the periphery of these integrated core 5b, twines a plurality of coil 5c that are installed with the commutator segment 6b conducting of stipulating, thus, has consisted of armature 5.

In addition, symbol 8 is illustrated in the pair of permanent magnets that is fixed on the inner peripheral surface of the yoke 3 relative with armature 5 predetermined distance spaced apart in the circumferential direction, and the periphery of the inner peripheral surface of this permanent magnet 8 and armature 5 is configured to close to each other relative.

And in order to consist of the P of pump section, the underpart 5d of armature shaft 5a is in the through hole 9a that offers at the axle core of the lower bracket 9 of the ring-type of the underpart that is fixed on yoke 3, rotationally by the bearing 9b supporting that is configured on this through hole 9a.And such as described later, by providing external power supply to brush 7, via commutator segment 6b, above-mentioned each coil 5c is by excitation, and thus, brush core 5 is configured to and can be rotated in the yoke 3 that has been formed magnetic pole by permanent magnet 8.

The periphery edge of above-mentioned lower bracket 9, with the below that is configured in this lower bracket 9 with being the butt shape, consist of the periphery edge of pump bracket 10 of the underpart of housing of the present invention, quilt is held back to be connected on the downside end difference 3b that is formed on the yoke 3, has consisted of the P of pump section by lower bracket 9 and pump bracket 10.

Below above-mentioned lower bracket 9, form the recess 9c of lower opening, compared the periphery edge that is positioned at outside diameter with recess 9c by what make that pump bracket 10 is connected to this lower bracket 9, between lower bracket 9 and pump bracket 10, formed pump chamber PR.And, be applied in the underpart 5d of the armature shaft 5a that also gives prominence among the through hole 9a of lower bracket 9 downwards, in above-mentioned pump chamber PR, give prominence to, peripheral portion is formed with the impeller 11 of the 11a of impeller section outside, cooperate by key, be spline shape ground and run through and be bearing on this underpart 5d that gives prominence to, thus, be configured to be accompanied by the driving of motor part M, impeller 11 is rotated.

In addition, outside diameter at the recess 9c of above-mentioned lower bracket 9, form the 11a of impeller section with impeller 11 relative and become the annular recessed portion 9d of stream of fuel in, offered with this annular recessed portion 9d communicatively in the above-below direction perforation and with the motor part side discharge portion 9e that is communicated with between motor part M and the P of pump section.On the other hand, on pump bracket 10, formed the recess 10a of the underpart 5d that is used for being entrenched in the armature shaft 5a that gives prominence to, is supporting impeller 11 in spline shape ground in the above-mentioned pump chamber PR with moving about, meanwhile, formed that the 11a of impeller section (lower bracket annular recessed portion 9e) with impeller is relative, the annular recessed portion 10b of the stream that becomes fuel.And then, formed the poroid fuel sucting 10c of cylinder that connects, is used for sucking fuel with the state that is communicated with above-mentioned annular recessed portion 10b at above-below direction, on the circumferential position different from this fuel sucting 10c, formed with the state that is communicated with annular recessed portion 10b above-below direction connect and below outstanding, the poroid fuel discharge portion 10d of cylinder that is used for discharging to the outside fuel.

Symbol 12 expressions are arranged on the one-way valve of fuel discharge portion 10d, this one-way valve 12 includes the valve body 12a of bottom tube-like, the spherical spool 12c that sealing is opened in the through hole 12b on the top of the top that is positioned at this valve body 12a, and be configured to reach by the pressure of the fuel of discharging from fuel discharge portion 10d the pressure of regulation, spool 12c can open wide the through hole 12b of valve body 12a, discharges fuel to discharge guiding described later road 13g side.In addition, one-way valve 12 is configured to and can moves up at upper and lower in fuel discharge portion 10d, and be constituted as the function that has as safety valve, with discharge the pipe arrangement that guiding road 13g side is connected in fuel be in the situation of High Temperature High Pressure, by upward displacement of valve body 12a, can be so that discharge the pressure decreased of the fuel of guiding road 13g side.

On the other hand, offered the through hole 2b of ring-type at the base of above-mentioned fuel tank 2 2a, this through hole 2b is configured to be closed by pump support unit (being equivalent to the pump supporting structure in the technological scheme) 13 is set.And said pump support unit 13 is constituted as the function that has at fuel tank 2 internal support petrolifts 1.

That is, formed the 13a of bottom tube-like section in the lower portion of said pump support unit 13, had on the cylinder outer circumferential face of the 13a of bottom tube-like section at this, formed to the side-prominent lip part 13b of external diameter.And, by with above-mentioned lip part 13b and fuel tank through hole 2b butt be fixed, set for and can cover fuel tank through hole 2b by there being the 13a of bottom tube-like section to be closed shape ground, under this state, be constituted as the below that the 13a of bottom tube-like section is configured in fuel tank 2 with being standing shape.

In addition, pump support unit 13, position above lip part 13b, from becoming the upper side neck ora terminalis that the 13a of bottom tube-like section is arranged that is embedded in the position in the fuel tank 2, be integrally formed into a plurality of support plate 13c that extend upward in the mode that separates in a circumferential direction predetermined distance, in the upper end portion of these support plates 13c, integrally formed fixed plate 13d to the internal side diameter bending.And, pump support unit 13, by being fixed on, fixed plate 13d is configured on the upper lateral bracket 9 of the petrolift 1 in the fuel tank 2, being configured to can be in support plate 13c and yoke 3 near relative state lower support petrolift 1, thus, petrolift 1 orthostatism that becomes downside with the P of pump section is fixed and is bearing in the fuel tank 2.

In addition, on the inner peripheral surface that bottom tube-like section 13a arranged outstanding to outside (below) from fuel tank 2 of pump support unit 13, formed the little end difference 13e of downside diameter, on this end difference 13e, be fixed wtih the dividing plate 14 of circular plate shape with being closed shape and butt shape, this dividing plate 14 be configured to have the 13a of bottom tube-like section the cylinder in separate up and down.Here, dividing plate 14 is to configure to compare the mode that is positioned at the below with the base 2a of fuel tank 2, is configured to relative with the pump bracket 10 that is bearing in the petrolift 1 under the erectility by support plate 13c, fixed plate 13d.

Be provided with fuel filter 15 in aforementioned barriers 14, the fuel that the 13a of bottom tube-like section side inflow is arranged through the through hole 2b of fuel tank base 2a, from the upper direction of dividing plate 14, be configured to and flow into downwards via fuel filter 15 sections of setting, thus, the lower portion that is separated by dividing plate 14 that the 13a of bottom tube-like section is arranged is constituted as and stores the fuel supplying part 13f that has been carried out the fuel that filters by fuel filter 15.

And, at the outside diameter position of the dividing plate 14 relative with pump bracket 10, with fuel sucting 10c relatively upward the outstanding suction that has formed tubular with guiding road 14a.This sucks to be formed via the through hole 14b that is opened on the dividing plate 14 with guiding road 14a and is communicated with fuel supplying part 13, and is embedded in the outstanding front end that guides road 14a by this suction to be attached thereto in the fuel sucting 10c of tubular of above-mentioned petrolift 1 side with being closed shape and connects.Thus, be constituted as the rotation of the impeller 11 that is accompanied by petrolift 1, store the fuel that has carried out filtration in fuel supplying part 13f via sucking with guiding road 14a, can be provided for petrolift sucting 10c.

In addition, at the outside diameter of dividing plate 14, at the outside diameter that is positioned at the position relative with the fuel discharge portion 10d of pump bracket 10, formed to discharge and used through hole 14c.Above-mentioned discharge is made of the through hole of up/down perforation dividing plate 14 with through hole 14c, and the fuel discharge portion 10d that is configured to petrolift 1 side is closed shape ground and connects.And, be embedded in above-mentioned discharge with the perforation front end of the fuel discharge portion 10d in the through hole 14c, be configured to be embedded in discharge guiding road (being equivalent to the guiding road in the technological scheme) 13g that is formed on the 13a of bottom tube-like section with being closed shape.Above-mentioned discharge guiding road 13g is and is formed on that fuel supplying part 13f on the 13a of bottom tube-like section is spaced from each other and with morphogenetic with the shape of this fuel supplying part 13f adjacency, and be to form to the mode that outside diameter extends from the base side that the 13a of bottom tube-like section is arranged, to be configured to be connected with the extension end of this discharge guiding road 13g from the pipe arrangement that starts pusher side (not shown).

In addition, the peripheral part that the 13a of bottom tube-like section is arranged that exposes from fuel tank 2 as pump support unit 13, at the position of comparing with fuel tank base 2a below being positioned at, integrally formed be used for connecting not shown outside joiner with the 13h of joiner section of input external power supply.And, via the external power supply of the 13h of joiner section input, be configured to via the first end daughter board 16 that is plugged in the L font in the 13h of this joiner section, can provide to the flange 7 on the upper lateral bracket 4 that is configured in petrolift 1 towards electrically conductive plate 16a, the second terminal board 16b of above-below direction.

And, the petrolift 1 of present embodiment, be provided with as the pressure regulation device 17 of discharging air mechanism at the upper lateral bracket 4 that consists of motor part M, and be constituted as by the pressure in the petrolift 1 and reach authorized pressure, can discharge fuel in the petrolift 1 to adjust the pressure in the petrolift 1 to fuel tank 2 sides, meanwhile, can the Bas Discharged that enters in the fuel tank 1 is extremely outside.

Above-mentioned pressure regulation device 17 is arranged on from the upper side of upper lateral bracket 4 and forms downwards in the shrinkage pool 4c of groove shape, comprise the through hole 4d that offers in the groove bottom of this shrinkage pool 4c in order to be communicated with fuel tank 2 sides, be used for stopping up the spherical spool 17a of this through hole 4d, to through hole 4d side this spool 17a being carried out elasticity pushes and loads in order to stopped up the elastic mechanism 17b of through hole 4d by spool 17a sealing, and be configured in motor part M, be accompanied by the pressure-acting of the loading force that surpasses elastic mechanism 17b, spool 17c opens wide, via through hole 4d, the fuel in the yoke 3 can be discharged to fuel tank 2 sides.

In the petrolift 1 that consists of like this, if provide power supply via first end daughter board 16, electrically conductive plate 16a, the second terminal board 16b to flange 7 from the outside joiner (not shown) that is connected with the 13h of joiner section, thereupon one rotation of then armature shaft 5a rotation, impeller 11.Thus, from fuel tank 2, store fuel in fuel supplying part 13f to be carried out the state that filters, via fuel sucting 10c, be inhaled in the P of pump section.The fuel that this is inhaled into, the lower bracket annular recessed portion 9d that forms take the relative section at the 11a of impeller section of impeller and pump bracket annular recessed portion 10b are as stream, can be directed to the motor part side discharge portion 9e of lateral bracket 9 and the fuel discharge portion 10d of pump bracket 10, and be directed to via fuel guiding road 13g and to start pusher side.At this moment, pressure regulation device 17 becomes the state of locking, is configured to increase by the pressure in the petrolift 1 open wide, and discharges fuel to fuel tank 2 sides, with the pressure in the suitable adjustment petrolift 1.

And, in the case, stored the fuel in fuel supplying part 13f, to move take the position from the fuel sucting 10c in the pump bracket 10 that is formed on the P of pump section to fuel discharge portion 10d as stream, between yoke 3 (permanent magnet 8) inner peripheral surface of motor part M and armature 5, do not form fuel flow path, thus, can set as small as possible yoke 3 (permanent magnet 8) inner peripheral surface of motor part M and the gap between the armature 5, in addition, because therefore fuel flow path only in the P of pump section, can reduce the pressure loss so be constituted as.In addition, fuel discharge portion 10d becomes the fuel that configures adjacently via the fuel supplying part 13e with pump support unit 13 and guides road 13g to the structure of starting the pusher side guiding, thus, do not need as existing fuel supplying device, make to draw the structure of such complexity to the pipe arrangement that starts pusher side from fuel tank from the fuel discharge portion of petrolift with being closed shape, but be constituted as the compactness that to realize fuel supplying device.

In the present embodiment that consists of as described above, the petrolift 1 that consists of fuel supplying device becomes brush 7 and the structure that is arranged on commutator 6 sliding contacts on the armature shaft 5a, and the periphery of armature 5 is set up with approximating state with the inner peripheral surface that is arranged on the permanent magnet 8 on yoke 3 inner peripheral surfaces.In the case, petrolift 1, owing to being to be formed on the pump bracket 10 of the P of pump section that is arranged to vertical and is positioned at downside towards the state of above-below direction with fuel sucting 10c, so, not only can effectively suck the fuel in the fuel tank 2, and owing to being that fuel discharge portion 10d also is formed on the structure on the pump bracket 10, although so be full of fuel in motor part M side, but need to be in yoke 3, namely between yoke 3 inner peripheral surfaces that are fixed wtih permanent magnet 8 and armature 5 outer circumferential faces, form stream, therefore, the periphery of armature 5 and yoke 3 inner peripheral surfaces can be configured to closer to each otherly, can realize thus the compactness of petrolift 1.

And, in this structure, because fuel discharge portion 10d is formed on the P of pump section side (below), do not run through the inside and outside of fuel tank 2 and outside such pipe arrangement that arrives so do not need all to arrange with being used to form the matched tube structure that leads to the stream that starts pusher side, and, owing to can shorten from fuel discharge portion 10d to the fuel flow path that starts pusher side, so not only can reduce number of components, and can reduce the pressure loss, the further compactness of fuel supplying device can be realized, the compactness of fuel tank 2 can also be realized.

In addition, in this structure, because pressure regulation device 17 is arranged in the diameter length of the P of pump section, so can realize further compactness.

In addition, in implementing structure of the present invention, petrolift 1 is bearing in the fuel tank 2 by support plate 13c and the fixed plate 13d of pump support unit 13, in the case, in pump support unit 13, formed the 13a of bottom tube-like section, this have the 13a of bottom tube-like section be closed shape ground cover fuel tank 2 base 2a through hole 2b and compare with fuel tank base 2a and to be positioned at the below.And, at the fuel supplying part 13f that has the 13a of bottom tube-like section to form to store the fuel of supplying with for the fuel sucting 10c to petrolift 1.Thus, do not need to be provided for individually respectively supporting part and the fuel supplying part of supporting fuel pump 1, thereby can realize reducing the purpose of number of components, simplified structure.And, fuel supplying part 13f is positioned at the below owing to comparing with fuel tank 2, even not affected by it so the pasta of fuel tank 2 changes, can provide fuel to petrolift 1, even the fuel in the fuel tank 2 tails off, also can provide to petrolift 1 reliably, can realize stable fuel supply.And, owing to can increase the amount of the effective fuel in the fuel tank 2, so can realize the further miniaturization of fuel tank 2.

And, in this structure, owing to constituting and in fuel supplying part 13, being provided with fuel filter 15, to store in fuel supplying part 13 to have passed through the state that filters from the fuel of fuel tank 2, so do not need to guarantee separately that fuel filter 15 sets the space of usefulness, and the shape of fuel filter 15 and the size of fuel supplying part 13f are increased matchingly, can make better petrolift 1.

And, in this structure, owing in pump support unit 13, having formed the fuel guiding road 13g that becomes from the stream of the fuel of fuel discharge portion 10d, so easily configuration is used for leading to the pipe arrangement of the stream that starts pusher side, can not become complicated structure, can realize the miniaturization of fuel supplying device.

And, in this structure, because in pump support unit 13, the integrally formed 13h of joiner section that is used for providing to brush 7 the outside joiner of external power supply that connects, so, can further realize the simplification of the structure of fuel supplying device, can help compactness.

In addition, the present invention is not defined to above-mentioned mode of execution certainly, also motor part can be made the structure of the electric motor that utilizes the brushless type, in the case, also can shorten the stator coil inner peripheral surface that is configured on the yoke inner peripheral surface and the distance between the rotor outer circumferential face and realize compactness, and can realize the shortening of fuel flow path.

Utilize possibility on the industry

The present invention is useful for the petrolift that carries in the vehicles such as two-wheeled motorcycle, need in yoke, not form fuel flow path, so yoke inner peripheral surface and armature outside closely can be arranged, and owing to not needing to run through the setting of interior other places with being used to form the matched tube structure that leads to the fuel flow path that starts pusher side, can shorten fuel flow path, so, number of components not only can be reduced, and can reduce the pressure loss, can realize the compactness of fuel supplying device and fuel tank.

Claims

1. petrolift, described petrolift is arranged on the base of fuel tank, by the pump section of the bottom that is contained in housing in the quilt and by in be contained in housing top consist of with the motor part of driven pump section, it is characterized in that,

Described motor part possesses armature and upper lateral bracket, and this armature possesses armature shaft, the described armature of lateral bracket rotatably support on this;

Described pump section possesses lower bracket, pump bracket, impeller, the described armature of this lower bracket rotatably support has also formed annular recessed portion, this pump bracket is connected to this lower bracket and has formed annular recessed portion, this impeller is configured in the pump chamber that is formed between described lower bracket and the described pump bracket, and be fixed on the described armature shaft one rotation with the rotation of described armature;

On described pump bracket, fuel sucting and fuel discharge portion have been formed, this fuel sucting connects at above-below direction with the state that is communicated with the annular recessed portion of described pump bracket, suck fuel to described pump section, this fuel discharge portion connects at above-below direction with the state that is communicated with the annular recessed portion of described pump bracket, and outstanding downwards, fuel is discharged to the fuel guiding road of starting the pusher side guiding from described pump section to being used for

Described impeller sucks fuel through described fuel sucting in described pump section, supply with the fuel of described suction to described fuel discharge portion as stream take the annular recessed portion of the annular recessed portion of described lower bracket and described pump bracket, the fuel that is fed into this fuel discharge portion starts the pusher side guiding through described fuel guiding road direction.

2. petrolift according to claim 1 is characterized in that, has consisted of described motor part by the electric motor of electric brush type.