CN205663547U

CN205663547U - Electric fuel pump

Info

Publication number: CN205663547U
Application number: CN201620538844.6U
Authority: CN
Inventors: 徐恩慧
Original assignee: WENZHOU KANGSONG AUTOMOBILE COMPONENTS AND PARTS CO Ltd
Current assignee: WENZHOU KANGSONG AUTOMOBILE COMPONENTS AND PARTS CO Ltd
Priority date: 2016-06-03
Filing date: 2016-06-03
Publication date: 2016-10-26
Anticipated expiration: 2026-06-03

Abstract

The utility model relates to an electric fuel pump, including aluminum casing, be equipped with the inner chamber in the aluminum casing, the inner chamber is both ends opening setting, and the aluminum casing both ends are equipped with pump head cover, base, pump head cover is equipped with the oil -out, pump head cover oil -out department still is connected with the pump head, pump head cover still is equipped with O shape sealing washer with the aluminum casing junction, the position that the base corresponds the oil -out is equipped with the oil inlet, interior intracavity be equipped with O shape sealing washer, carbon brush frame, magnetic shoe, oil pump and rotor, its characterized in that: the base is the ring form, the base inside callipers is equipped with the filter screen, the filter screen still is connected with the base relief valve for the one side of cavity.

Description

A kind of electric fuel punp

Technical field

This utility model relates to a kind of automobile component, is specifically related in automobile oil supply system the electric fuel punp of application.

Background technology

Electric fuel punp is the critical piece of vehicle fuel pump assembly, and fuel oil pump assembly is arranged in automotive oil tank, and it is Automobile oil feed line provides pressure oil, and the effect of electric fuel punp is that the fuel oil existing in automotive oil tank is delivered to fuel injector In fuel pipe, the fuel oil of supply fuel injector certain pressure, fuel injector, according to the instruction oil spout of ECU, drives automobile engine to enter Row work.The electric fuel punp of conventional belt roller oil pump assembly, roller oil pump assembly is by the pump housing, cylindrical rollers and rotation Pump core etc. form, and five rollers can radially slide in the groove rotating pump core, rotate pump core and there is certain bias with the pump housing, turn Dynamic pump core rotates under the driving of armature spindle, and under the influence of centrifugal force, roller is pressed on the internal circular surfaces of the pump housing, forms five Individual relatively independent annular seal space；During rotation, the volume of each annular seal space constantly changes, and when oil-in, volume increases, shape Becoming certain vacuum, by the gasoline suction pump through filtering, at oil-out, volume diminishes, and pressure raises, and is pumped out by gasoline Outside pump.The electric fuel punp of conventional belt roller oil pump assembly has the disadvantage that structure is relative complex, and assembling is also inconvenient, The charge oil pressure stability of fuel pump is the most poor, and especially roller oil pump assembly self is without relief valve, during fuel pump fuel feeding Easily cause pump housing pressure transient, thus affect the stability of fuel feeding oil pressure.

Utility model content

In view of the deficiencies in the prior art, this utility model provides a kind of simple in construction, easy to assembly, raising fuel feeding oil pressure Stability, the electric fuel punp of length in service life.

For achieving the above object, this utility model provides following technical scheme: a kind of electric fuel punp, includes outside aluminum Shell, is provided with inner chamber in described aluminum shell, described inner chamber is that both ends open is arranged, and aluminum shell two ends are provided with pump head lid, base, described Pump head is covered with oil-out, and described pump head lid is also associated with pump head, and described pump head lid and aluminum shell junction are additionally provided with O shape and seal Circle, the position of described base correspondence oil-out is provided with oil-in, described interior intracavity be provided with O-ring seals, carbon brush holder, magnetic shoe, Oil pump and rotor, it is characterised in that: described base is that in one end internal diameter is less than the circular of other end internal diameter, described base, card sets Drainage screen, described drainage screen is had to be also associated with base relief valve relative to the one side of cavity.

Using technique scheme, directly arranging drainage screen on base oil-in can more preferable miscellaneous in filter fuel Matter, the base relief valve connected on drainage screen substantially increases stability during fuel pump fuel feeding.

Above-mentioned a kind of electric fuel punp can be further arranged to: described base relief valve includes valve seat, spool, bullet Spring, described valve seat is connected with drainage screen, and described spring one end is conflicted with valve seat, and the other end is set on spool, described spool phase It is connected on oil pump for connecting the other end of the end of spring.

Using technique scheme, valve seat is connected with the drainage screen on base, and spool is directly connected on oil pump, Ke Yigeng Pressure release timely.

Above-mentioned a kind of electric fuel punp can be further arranged to: described aluminum shell connects the internal diameter of base one end and is less than Connecting the internal diameter of pump head lid one end, described aluminum shell is additionally provided with O-ring seals at connection oil pump.

Use technique scheme, in the cavity of aluminum shell, connect base position one O-ring seals is set, improve whole The sealing of body, aluminum shell connects internal diameter one step of little formation than the other end of base position, and O-ring seals can well It is placed on this step.

Above-mentioned a kind of electric fuel punp can be further arranged to: is provided with orthogonal support bar in the middle of described base.

Use technique scheme, two mutually perpendicular support chips of band are set in the middle of disc base, it is provided that give The support that drainage screen is certain so that drainage screen will not be flushed to base exterior because oil pressure is excessive.Support chip also improves to be let out The stability of pressure valve, will make relief valve be rushed out base because of oil pressure is excessive.

Above-mentioned a kind of electric fuel punp can be further arranged to: the material of described O-ring seals is fluorubber.

Use technique scheme, the material of O-ring seals is set to fluorubber, because fluorubber has the most resistance to Hot, non-oxidizability, oil resistivity, corrosion resistance and resistance to weathering, be extremely applicable to auto parts and components.

With embodiment, this utility model is described in further detail below in conjunction with the accompanying drawings.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of this utility model embodiment.

Fig. 2 is the base front elevational schematic of this utility model embodiment.

Detailed description of the invention

See shown in Fig. 1, Fig. 2: a kind of electric fuel punp, include aluminum shell 500, in being provided with in described aluminum shell 500 Chamber 700, inwardly there is band bound edge 501 described aluminum shell 500 one end, and the other end designing one end relative to bound edge 501 is that opening sets Putting, aluminum shell 500 two ends are provided with pump head lid 100, base 110, and described pump head lid 100 is provided with oil-out 101, described pump head lid 100 are also associated with pump head 141, and described pump head lid 100 is additionally provided with O-ring seals 200, described base with aluminum shell 500 junction The position of 110 corresponding oil-outs 101 is provided with oil-in, is provided with O-ring seals 200 and O-ring seals in described inner chamber 700 900, carbon brush holder 300, magnetic shoe 600, oil pump 800 and rotor 400, described base 110 is less than other end internal diameter for one end internal diameter Circular, it is arranged with drainage screen 112 in described base 110, described drainage screen 112 is also associated with base relative to the one side of cavity Relief valve 111.Described base relief valve 111 includes valve seat 123, spool 121, spring 122, described valve seat 123 and filtration Net 112 connects, and conflicts with valve seat 123 in described spring 122 one end, and the other end is set on spool 121, and described spool 121 is relative The other end in the end connecting spring 122 is connected on oil pump 800.It is provided with orthogonal support bar in the middle of described base 110 111。

Claims

1. an electric fuel punp, includes aluminum shell, is provided with inner chamber in described aluminum shell, and inwardly there is band described aluminum shell one end Bound edge, the other end designing one end relative to bound edge is that opening is arranged, and aluminum shell two ends are provided with pump head lid, base, described pump head Being covered with oil-out, described pump head lid is also associated with pump head, and described pump head lid and aluminum shell junction are additionally provided with O-ring seals, The position of described base correspondence oil-out is provided with oil-in, and described interior intracavity is provided with O-ring seals, carbon brush holder, magnetic shoe, oil pump And rotor, it is characterised in that: described base is that one end internal diameter is less than the circular of other end internal diameter, is arranged with in described base Filter screen, described drainage screen is also associated with base relief valve relative to the one side of cavity.

A kind of electric fuel punp the most according to claim 1, it is characterised in that: described base relief valve includes valve Seat, spool, spring, described valve seat is connected with drainage screen, and described spring one end is conflicted with valve seat, and the other end is set on spool, Described spool is connected on oil pump relative to the other end of the end connecting spring.

3. according to claim 1 or described a kind of electric fuel punp, it is characterised in that: described aluminum shell connects base one end Internal diameter less than connecting the internal diameter of pump head lid one end, described aluminum shell is additionally provided with O-ring seals connecting at oil pump.

A kind of electric fuel punp the most according to claim 3, it is characterised in that: it is provided with orthogonal in the middle of described base Support bar.

A kind of electric fuel punp the most according to claim 4, it is characterised in that: the material of described O-ring seals is fluorine Rubber.