KR20130064941A - Manufacturing method of fuel pump for vehicle - Google Patents

Abstract

PURPOSE: A method of manufacturing a BLCD fuel pump for a vehicle is provided to conveniently manufacture a fuel pump by locking with forming a groove and a protrusion corresponded mutually or by thermal caulking a combining part and a junction of a configuration in mutual of a fuel pump. CONSTITUTION: A method of manufacturing a BLCD fuel pump for a vehicle comprises the following steps: an FPS control valve is assembled in a top cover and thermal coking; a rotor is built in an inside of a stator part(20) in which a coil is formed and a motor unit is formed; a fuel discharge case(60) is correspondence-locked in a lower part of the stator part; the top cover is correspondence-combined in an upper end of the stator part; a casing is assembled in an outer periphery of the motor unit; in a casing inside, an impeller is united with a bottom surface of the motor unit; and a fuel inhalation case is coked at a low end part of the casing after a bond.

Description

Manufacturing Method of Fuel Pump for Vehicle

The present invention relates to a method of manufacturing a BLDC fuel pump for a vehicle that is easy to manufacture and assemble by constructing to be mutually fastened by molding, caulking, etc., in a manner of welding each component when manufacturing a vehicle BLDC fuel pump.

A fuel tank for storing fuel is provided in a vehicle such as a gasoline engine or a diesel engine and the fuel tank is provided with a fuel pump for forcibly supplying fuel to the engine, The fuel pump is divided into a DC fuel pump and a BLDC fuel pump depending on the presence or absence of a brush (BRUSH).

Generally, the BLDC fuel pump related to the present invention supplies electric power to the STATOR (stator) through the terminal & connector when the engine start switch of the vehicle is turned on, and the electric field is formed in the STATOR The BLDC fuel pump is capable of discharging the fuel in the fuel tank and the fuel discharged through the BLDC fuel pump is supplied to the engine at a constant pressure. do.

As a technology related to a fuel pump used in a vehicle, various technologies are provided in addition to the accompanying patent documents 1 to 4.

In the automotive DLC fuel pump module of Patent No. 10-1075795 (Patent Document 1), the guide rod can be cut to an appropriate length according to the specification of the fuel pump module so that it has good profitability and does not add to the economic burden of securing inventory. To provide technology.

In the vehicle VLC fuel pump of Patent No. 10-0993665, which is Patent Literature 2, the formation of the fuel oil film layer can be suppressed by always maintaining the constant contact surface pressure of the commutator of the carbon brush that supplies power to the armature through the commutator. In addition, it provides technology to keep the performance of the fuel pump stable.

The vehicle DLC fuel pump of Patent No. 10-0953409 (Patent Document 3) can improve the discharge performance (discharge pressure and discharge amount) without increasing the number of revolutions of the impeller, so it is suitable for high-power engines and does not increase the number of revolutions. As a result, they offer technology that increases durability and thus extends the life of the product.

In the fuel pump fixing structure of the fuel supply module for a vehicle of Patent Publication No. 10-0773370 of Patent Document 4 provided by the applicant of the present invention, the soundproof / dustproof efficiency against noise / vibration generated by driving the fuel pump is improved, Thereby reducing the number of parts for fixing and simplifying the structure.

However, such a conventional fuel pump is manufactured by fabricating a plurality of components as described above, when combining or assembling each other by welding, all of the coupling / contact portion by welding, this welding operation takes a lot of time in the process, manufacturing If a defect occurs in the middle of the production and the problem of having to manufacture the entire manufacture again, it is also difficult to accurately weld the joint / contact between each other, there was a problem that the production and assembly of the fuel pump is inconvenient.

The present invention is a means for solving the above problems, an object of the present invention, when manufacturing a vehicle BLDC fuel pump, the mutual configuration of the fuel pump constituting each other, without forming an integral through the welding work as conventional, mutual bonding And by thermally caulking the coupling portion or by forming a groove and protrusion corresponding to each other, it is to provide a method for manufacturing a vehicle BLDC fuel pump is easy and efficient production of fuel pump, easy to assemble compared to the existing.

Other objects and advantages of the present invention will be described hereinafter and will be understood by the embodiments of the present invention. Furthermore, the objects and advantages of the present invention can be realized by means and combinations indicated in the claims.

As described above, the present invention comprises the step of thermal caulking after assembling the fuel pressure control valve 12 in the upper cover (10) (S100); Forming a motor unit 40 by internalizing the rotor 30 in the stator unit 20 in which the coil is formed (S200); (S300) correspondingly fastening the fuel discharging case 60 to the lower end of the stator unit 20; Correspondingly coupling the upper cover 10 to an upper end of the stator unit 20 (S400); Assembling the casing 50 to the outer circumference of the motor unit 40 (S500); Coupling an impeller (70) to a bottom surface of the motor unit (40) in the casing (50); Coupling the fuel suction case 80 to the lower end of the casing 50 and caulking (S700); Characterized in that consists of.

As described above, in the present invention, when assembling / fastening of the components of the fuel pump, by removing from the conventional welding coupling, by forming a corresponding groove and a projection to combine, there is a simple and easy effect of assembly.

In addition, the present invention has the effect of maintaining the airtightness by thermal caulking or caulking the contact between the fuel pump components.

In addition, the present invention is easy and easy to assemble, there is an effect such as increase in manufacturing efficiency, reduction in manufacturing cost, manufacturing manpower reduction, manufacturing time shortening.

1 is a perspective view of one embodiment showing the step of forming a top cover according to the present invention.
Figure 2 is an exploded perspective view of an embodiment showing a coupling relationship between the motor unit and the fuel discharge case according to the present invention.
Figure 3 is a perspective view of one embodiment showing the groove and the projection and step and the mounting surface for coupling the fuel discharge case and the stator portion in FIG.
Figure 4 is a cross-sectional view of the combined portion of the fuel discharge case and the stator portion of FIG.
Figure 5 is a perspective view of one embodiment showing a combination of the stator portion and the upper cover according to the present invention.
Figure 6 is a perspective view of one embodiment showing the coupling of the stator portion and the casing according to the present invention.
Figure 7 is a perspective view of one embodiment showing the combination of the impeller and the fuel suction case for forming a pump unit according to the present invention.
Figure 8 is a perspective view of one embodiment showing a fuel pump for the vehicle is assembled according to the present invention.

Before describing in detail several embodiments of the invention, it will be appreciated that the application is not limited to the details of construction and arrangement of components set forth in the following detailed description or illustrated in the drawings. The invention may be embodied and carried out in other embodiments and carried out in various ways. It should also be noted that the device or element orientation (e.g., "front,""back,""up,""down,""top,""bottom, Expressions and predicates used herein for terms such as "left,"" right, "" lateral, " and the like are used merely to simplify the description of the present invention, Or that the element has to have a particular orientation.

The present invention has the following features in order to achieve the above object.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

To this end, according to an embodiment of the present invention,

Thermal caulking after assembling the fuel pressure control valves 12a and 12b to the upper cover 10 (S100); Forming a motor unit 40 by internalizing the rotor 30 in the stator unit 20 in which the coil is formed (S200); (S300) correspondingly fastening the fuel discharging case 60 to the lower end of the stator unit 20; Correspondingly coupling the upper cover 10 to an upper end of the stator unit 20 (S400); Assembling the casing 50 to the outer circumference of the motor unit 40 (S500); Coupling an impeller (70) to a bottom surface of the motor unit (40) in the casing (50); Coupling the fuel suction case 80 to the lower end of the casing 50 and caulking (S700); Characterized in that consists of.

In addition, in step S300, the stator portion 20 forms a stepped protrusion 21 protruding into the lower end inner circumference, and one surface of the upper cover 10 is seated in contact with the stepped protrusion 21. Protruding the surface 61 to be fitted to each other, but the protruding projection 22 is locally formed on the stepped jaw 21, the fitting projection 22 is fitted to the seating surface 61 is fitted After forming the groove 62, the upper cover 10 is coupled to the stator unit 20, the fuel discharge case 60 can be floated in the stator unit 20 even when the rotor 30 is rotated. It is characterized by that.

In addition, in the step S300, the stator part 20 has a plurality of indentation surfaces 23 at the inner circumferential edge of the lower part so as to protrude from each other, thereby forming a seating surface 61 formed on one surface of the fuel discharging case 60. It is characterized in that the outer periphery is fitted to the lower end of the stator portion 20.

Hereinafter, a method of manufacturing a vehicle BLDC fuel pump according to a preferred embodiment of the present invention will be described in detail with reference to FIGS. 1 to 8.

1. The step of thermal caulking after assembling the fuel pressure control valve (12a, 12b) in the upper cover (10); The upper cover 10 is a place where the fuel sucked through the pump unit 90, the fuel discharge case 60, the impeller 70, the fuel suction case 80 to be described later is discharged, the upper cover ( Fuel pressure control valves 12a and 12b are installed in the discharge pipe 11 through which the fuel is discharged from 10 and inside the upper cover 10 in which the upper end of the motor part 40 to be described later is partially installed. A step of fixing the fuel pressure control valves 12a and 12b to the upper cover 10 by performing thermal caulking by caulking and applying heat so that the pressure control valves 12a and 12b can be fixed to the installation portion. In the upper cover 10, a plurality of brushes 13 which receive electricity from an electric socket provided on an upper surface thereof protrude downward.

2. The step of forming the motor unit 40 by the internal installation of the rotor 30 in the stator portion 20, the coil is formed (S200): through the fuel pressure control valves (12a, 12b) is coupled through the step S100 As a step for forming the motor unit 40 is coupled to the upper cover 10, as described above, the inner center penetrates, and the rotor 30 is inside the stator unit 20 in which the coil is wound. ), And the rotor 30 has a rotating shaft 31 protruding from both ends thereof and a plurality of stator magnets are installed therein, and the rotor 30 is inside the stator part 20. Is rotated in, in conclusion, serves to rotate the impeller 70 of the pump unit 90 to be described later.

3. Correspondingly fastening the fuel discharging case 60 at the lower end of the stator unit 20 (S300): Fuel discharging case 60 at the lower end of the stator unit 20 in which the rotor 30 is internally installed. As the step of fastening the corresponding, in the present invention to form a groove and a projection in the stator unit 20 and the fuel discharge case 60, respectively, so as to correspond to the fastening, which will be described in more detail,

At the inner circumference of the lower end of the stator portion 20, a stepped protrusion 21 is formed to protrude therein, and the fuel discharging case 60 has a disc shape, but is placed on the stepped portion 21 of the stator portion 20 to be contacted. The mounting surface 61, which may be protruded from one surface. That is, when the fuel discharge case 60 is fastened to one side of the stator part 20, the seating surface 61 of the fuel discharge case 60 is inserted into the step 21 and is fitted.

At this time, the inner periphery of the lower portion of the stator portion 20 is formed so that the plurality of indentation surface 23 to be spaced apart from each other to the inside of the stator portion 20, the fuel discharge case 60 is the stator portion 20 When fitted to the lower end of the fuel discharge case 60, the periphery (outer periphery) of the seating surface 61 is in contact with the inner periphery of the lower end of the stator part 20, but is inserted due to the plurality of indentation surface 23, By allowing the fuel discharge case 60 to be inserted into the stator portion 20, the fixing force of each other is increased.

In addition, the stepped portion 22 of the above-described stator part 20 locally forms the fitting protrusions 22, and the fitting grooves 62 to which the fitting protrusions 22 correspond and fit into the stepped protrusions 22 are formed. It is formed so as to be dug to the mounting surface 61 corresponding to (21) and is seated in contact, when fitting the fuel discharge case 60 to the lower end of the stator portion 20, the fitting projection in the fitting groove 62 By allowing the 22 to correspond to each other, the fuel discharging case 60 may be floated on the stator unit 20 without being rotated, unlike the impeller 70 to be described later, in which the rotor 30 is rotated when rotating. To ensure that In other words, it is a configuration for preventing the rotation of the fuel discharge case (60).

4. Correspondingly coupling the upper cover 10 to the top of the stator unit 20 (S400): the step of correspondingly fastening the upper cover 10 formed in step S100 to the top of the stator unit 20 in step S200 As such, a plurality of stator grooves 21 of the stator portion 20 are formed, such that the plurality of brushes 13 of the stator portion 20 correspond to the above-described stator grooves 21 and are fitted into the stator grooves. The part 20 and the fuel discharging case 60 are fixed to each other, and due to the fastening, the stator part 20 receives electricity from an electric socket. That is, the upper cover 10 has a form of pressing and fastening to the upper end of the stator portion 20.

5. Assembling the casing 50 on the outer periphery of the motor unit 40 (S500): As described above, the rotor 30 is installed in the stator unit 20, but the upper cover 10 at the bottom In the step of assembling the casing (50) having a hollow cylindrical shape inside the outer circumference of the motor unit 40 is coupled to. At this time, the length of the casing 50 surrounding the outer periphery of the motor unit 40 is relatively longer than the length of the motor unit 40 to which the fuel discharge case 60 is coupled, the impeller 70 to be described later ) And the fuel suction case 80 may also be continuously installed at the lower end of the motor unit 40 in the casing 50.

6. Couple the impeller 70 to the bottom surface of the motor unit 40 in the casing (50) (S600): as in the step S500, the inner lower end of the casing 50, that is, the lower end of the motor unit 40 As it is coupled to the lower end of the fuel discharge case 60 is coupled, it is connected to the rotating shaft 31 of the rotor 30 described above, it is rotated by the rotor (30). That is, buoyancy is generated by the rotation of the impeller 70 and a pressure difference is generated by the buoyancy so that the fuel is sucked into the impeller 70 through the fuel suction case 80 which will be described later. The pressure of the fuel is increased by the rotational flow generated by the rotation of the) and is discharged out of the fuel pump of the present invention.

7. Coupling after coupling the fuel suction case 80 to the lower end of the casing (50) (S700): the fuel intake case 80 is coupled to the lower end of the motor unit 40 after the impeller 70 described above In other words, in other words, the fuel discharge case 60, the impeller 70, the fuel suction case 80 is sequentially coupled to the lower end of the motor unit 40, each through hole is formed in the center The rotary shaft 31 of the electron 30 is fitted, but only the impeller 70 has a structure that rotates with the rotor 30, the fuel discharge case 60, the impeller 70, the fuel suction case ( 80 are all installed in the casing 50 surrounding the motor unit 40, and eventually the motor unit 40, the fuel discharge case 60, the impeller 70, the fuel suction case 80 inside the casing 50. ) Will be in the form of sequentially inclined toward the longitudinal direction.

In addition, the fuel intake case 80 has a suction pipe 81 for sucking the fuel of the fuel tank protruding to the outside, is coupled to the bottom end of the casing 50, is installed inside the casing 50 The motor part 40, the fuel discharge case 60, the impeller 70, etc. are fixed so that their positions are not separated to the outside, and the contact portions between the fuel suction case 80 and the casing 50 are caulked. Thus, the airtightness of the contact portion or the connection portion between each other is maintained.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is to be understood that various changes and modifications may be made without departing from the scope of the appended claims.

10: upper cover 20: stator part
21: step 22: fitting
23: press-fitting surface 30: rotor
31: rotation shaft 40: coater portion
50: casing 60: fuel discharge case
61: seating surface 62: fitting groove
70: impeller 80: fuel intake case
90: pump part

Claims (3)

Thermal caulking after assembling the fuel pressure control valves 12a and 12b to the upper cover 10 (S100);
Forming a motor unit 40 by internalizing the rotor 30 in the stator unit 20 in which the coil is formed (S200);
(S300) correspondingly fastening the fuel discharging case 60 to the lower end of the stator unit 20;
Correspondingly coupling the upper cover 10 to an upper end of the stator unit 20 (S400);
Assembling the casing 50 to the outer circumference of the motor unit 40 (S500);
Coupling an impeller (70) to a bottom surface of the motor unit (40) in the casing (50);
Coupling the fuel suction case 80 to the lower end of the casing 50 and caulking (S700);
Method for manufacturing a vehicle BLDC fuel pump, characterized in that consisting of.
The method of claim 1,
In step S300
The stator portion 20 forms a stepped portion 21 protruding into the inner periphery of the lower end portion, and one surface of the upper cover 10 protrudes a seating surface 61 correspondingly contacted with the stepped portion 21. To form and fit together,
The stepped portion 21 protrudes from the fitting protrusion 22 locally, and the fitting surface 22 is formed with a fitting groove 62 to which the fitting protrusion 22 corresponds and fits, and the stator part 20 is formed. After the upper cover (10) is coupled to, the fuel discharge case (60) in the vehicle BLDC fuel pump manufacturing method characterized in that the fuel discharge case (60) can be floated on the stator unit 20 even when the rotor (30) rotates.
The method of claim 1,
In step S300
The stator part 20 has a plurality of indentation surfaces 23 on the inner periphery of the lower part so as to protrude from each other, so that the outer periphery of the seating surface 61 formed on one surface of the fuel discharging case 60 is a stator part ( 20) A method for manufacturing a vehicle BLDC fuel pump, characterized in that to be fitted to the lower end of the.

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