KR100865968B1 - Impeller case with fuel pump of automobile - Google Patents

Abstract

An impeller case with fuel pump of automobile is provided to shorten a process time and reduce manufacturing cost by omitting the extra surface treatment. A penetration hole(11) is formed on the center of one end of the case so that the motor shaft can penetrate and be combined with an impeller. A discharge unit(13) is formed on one end, penetrated inside the casing so as to discharge fuel flowed by the impeller. The discharge channel is connected radially to the discharge unit so as to discharge easily fuel to the discharge unit by the rotation of the impeller on the inner side of the case. The case accommodates a discharge case(10) of which outer surface is stepped, and the impeller, combined with the discharge case. A suction unit is formed on one side of the case penetrated inside the case so that fuel is flowed by the impeller. The suction case is connected to the suction unit so that fuel is distributed over the impeller by the rotation of the impeller, with the suction channel formed toward radial direction of the inner side of the case.

Description

Impeller Case with Fuel Pump of Automobile

1 is a schematic diagram showing a conventional vehicle fuel pump,

Figure 2 is a schematic diagram showing a case in the prior art,

3 is a plan view showing a discharge case according to an embodiment of the present invention,

4 is a cross-sectional view showing a portion A-A of FIG.

5 is a side view showing a discharge case according to an embodiment of the present invention,

6 is a rear view showing a discharge case according to an embodiment of the present invention,

7 is a plan view showing a suction case according to an embodiment of the present invention,

8 is a cross-sectional view illustrating a portion A-A of FIG. 7,

9 is a side view showing a suction case according to an embodiment of the present invention,

10 is a rear view showing a suction case according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10: discharge case 11: through hole

12: groove 13: discharge part

14: discharge passage 15: stepped portion

16: protrusion 17: assembly reference point

20: suction case 21: suction unit

22: suction passage 23: groove

24: coupling groove 25: ball

25a: ball rib 26: rib

27: press-fit unit 28: discharge hole

29: auxiliary rib

The present invention relates to an impeller case for an automobile fuel pump, and more particularly, is formed of a plastic resin material, so that the error range of dimensions during processing is small, so that the precision of processing is increased, and thus the processing time is shortened, and the separate surface treatment Since the manufacturing cost is reduced and the plastic resin case is composed of a discharge case and a suction case, the discharge case has an outer circumferential surface formed in multiple stages, and a protrusion is formed along the outer circumferential surface, and the discharge is in line with the protrusion. A groove is formed at one end of the case, and a plurality of ribs are formed at one end of the suction case, and a press-fitting part protruding at a predetermined interval is formed on the outer circumferential surface, and a groove is formed at the center of the inner surface, and is coupled to the center of the groove. As the grooves and balls are formed to increase the internal stress, the case is hardened inside the housing. The present invention relates to an impeller case for an automobile fuel pump that can minimize deformation due to a load and an impact generated during indentation.

In general, in a vehicle such as an automobile, a turbine type fuel pump is commonly used to pump fuel in a fuel tank to a fuel injection device.

1 is a schematic diagram showing a conventional vehicle fuel pump, Figure 2 is a schematic diagram showing a case in the prior art.

As shown in FIG. 1, the fuel pump includes a case 2 having an upper and a lower case coupled to the inside of the housing 4, a disk-type impeller 1 rotatably housed in the case, And a drive motor 3 connected to the impeller by a drive shaft to transmit rotational force, wherein the impeller is formed adjacent to the blade and a plurality of blades formed along the circumferential direction of the outer periphery thereof. Includes a groove.

As shown in FIG. 2, the case 2 is formed of a die casting material and includes an upper case 5 and a lower case 6. The upper case has a discharge hole 7 at one end thereof to discharge fuel. The through-hole is formed, and the lower case has an inflow hole 8 formed at one end thereof so that fuel is introduced into the lower case. The upper case and the lower case are combined to hollow the inside, and the impeller is installed inside the hollow case.

By the way, the case is generally formed of a die-casting material for processing, the die-casting case is difficult to process according to the design dimensions, resulting in poor dimensional accuracy, and must be subjected to several machining processes to fit the design dimensions This causes a problem that the output decreases and the production time increases.

In addition, the die casting case has a problem in that the manufacturing cost is increased because the surface must be coated before coupling to the housing of the fuel pump after several processing.

Accordingly, the present invention has been made to solve the above conventional problems,

It is made of plastic resin material, so the tolerance of dimension is small when processing, so the precision of processing is increased, and thus the processing time is shortened, and it does not need separate surface treatment to provide impeller case for automobile fuel pump which reduces manufacturing cost. There is a purpose.

In addition, the case formed of a plastic resin of the present invention is composed of a discharge case and a suction case, the outer case is formed in multiple stages in the discharge case is formed with a protrusion along the outer circumferential surface, one end surface of the discharge case in the same line as the protrusion A groove is formed, and the suction case has a plurality of ribs formed at one end thereof, a press-in part protruding at a predetermined interval from the outer circumferential surface thereof, a groove formed at the center of the inner surface, and a coupling groove and a ball formed at the center of the groove. It is another object of the present invention to provide an impeller case for an automobile fuel pump which can minimize deformation due to the load and impact generated when the case is forcibly pressed into the inside of the housing by increasing the internal stress.

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

The present invention is a case that is forcibly pressed into the housing of the fuel pump to install an impeller that is coupled to the motor shaft of the fuel pump for automobiles therein,

A through hole is formed in a central portion of one end surface so that the motor shaft penetrates and is coupled to the impeller, and a discharge part penetrated inside to discharge the fuel introduced by the impeller is formed at one end surface, and the fuel is rotated by the impeller. A discharge passage formed in the circumferential direction on the inner surface thereof so as to smoothly discharge the discharge portion, the discharge passage being connected to the discharge portion and formed as a stepped portion on the outer circumferential surface;

The suction case is coupled to the discharge case to accommodate the impeller, and the suction part penetrated inside and through so that the fuel is introduced into the inside by the impeller is formed on one side, and the inner surface circumference so that the fuel is delivered to the whole of the impeller by the rotation of the impeller Suction passage is formed in the direction consisting of a suction case connected to the suction portion,

The case is formed of a plastic resin material in order to increase the precision of the dimensions according to the processing, when the case formed of the plastic resin material is forcibly pressed into the housing of the fuel pump, the case of the discharge case to prevent the inside of the case is deformed A plurality of protrusions are formed on the outer circumferential surface of the stepped portion in a circumferential direction, and a groove (damping role of the protrusion) is provided on one end surface of the discharge case in the same line as the protrusion to mitigate the impact caused by forcing the housing into the housing. It is characterized in that a plurality is formed.

The present invention having such a feature will be more clearly described through the preferred embodiment accordingly.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors should properly explain the concept of terms in order to best explain their own invention. Based on the principle that can be defined, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

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.

3 is a plan view showing a discharge case according to an embodiment of the present invention, Figure 4 is a cross-sectional view showing a portion AA of Figure 3, Figure 5 is a side view showing a discharge case according to an embodiment of the present invention, Figure 6 is a rear view showing a discharge case according to an embodiment of the present invention, Figure 7 is a plan view showing a suction case according to an embodiment of the present invention, Figure 8 is a cross-sectional view showing a portion AA of Figure 7, 9 is a side view showing a suction case according to an embodiment of the present invention, Figure 10 is a rear view showing a suction case according to an embodiment of the present invention.

3 and 7, the impeller case 2 for automobile fuel pump of the present invention is formed of a plastic resin material is composed of a discharge case 10 and the suction case 20.

Referring to Figure 3, the discharge case 10 is coupled to the motor (3) shaft of the fuel pump for the vehicle is received therein the impeller (1) rotated by the motor (3), the impeller (1) The through hole 11 is formed at the center of one end surface (the surface corresponding to the motor 3) so that the shaft of the motor 3 coupled to the discharge case 10 passes through the center of the through hole 11. A plurality of grooves 12 are formed to be radially spaced apart from each other. At this time, the groove 12 is formed to relieve the impact transmitted to the discharge case 10 when the heat or the like is transferred to the case 2 formed of a plastic resin, or when forcibly pressed into the housing 4.

Here, one end surface (surface formed with the through-hole 11) of the discharge case 10 is formed with a discharge portion 13 penetrating therein to discharge the fuel introduced by the impeller 1, the discharge In the inner surface of the case 10 is connected to the discharge portion 13 so that fuel is smoothly discharged to the discharge portion 13 by the rotation of the impeller 1 is formed in the discharge passage 14 in the circumferential direction at regular intervals do.

In addition, the outer circumferential surface of the discharge case 10 is formed in multiple stages to form a stepped portion 15, and the case 2 formed of the plastic resin material on the outer circumferential surface of the stepped portion 15 has a housing 4 of the fuel pump. ), A plurality of protrusions 16 spaced apart at predetermined intervals in the circumferential direction are formed to prevent deformation of the inside of the case 2 (the space in which the impeller 1 is accommodated). In this case, the protrusion 16 directly contacts the inner circumferential surface of the housing 4 and serves to prevent the inside from being deformed by pressing the discharge case 10.

Here, the grooves 12 are formed on the same line as the protruding portion 16, respectively, and have a damping function so that an impact generated when the pressure is forcedly pressed into the housing 4 is not transmitted to the inside of the discharge case 10. The groove 12 is formed in the circumferential direction on one end surface of the discharge case in which the discharge portion is formed.

In addition, an assembly reference point 17 is formed on an outer circumferential surface of the discharge case 10 so that the case 2 is coupled to a proper position when the case 2 is coupled to the housing 4 of the fuel pump, and the assembly reference point 17 forms a groove. Thus, a coupling part (not shown) formed on the inner circumferential surface of the housing 4 is inserted.

Referring to FIG. 7, the suction case 20 forms a space in contact with one end of the discharge case 10 to accommodate the impeller 1 therein, and at one end surface of the suction case 20. An inner portion of the suction case 20 and a penetrating suction portion 21 are formed to protrude outwardly at a predetermined interval so that fuel is introduced into the inner portion by the impeller 1, and an impeller 1 is formed on an inner surface of the suction case 20. The suction flow passage 22 is formed at regular intervals in the circumferential direction so as to be connected to the suction portion 21 so that fuel is transmitted to the whole of the impeller 1 by the rotation of.

Here, the inner surface of the suction case 20 has a central portion recessed to form the same overall cross-sectional thickness (T1, T2) of the suction case 20 is deformed when the suction case 20 is pressed in the housing (4) In order to prevent the groove 23 is formed, in this case, with reference to Figure 8, the central portion of the suction case 20 is formed thicker than both ends of the circumferential direction of the suction case 20, the present invention ( While the 23 is formed, the overall cross-sectional thicknesses T1 and T2 of the suction case 20 are the same.
In addition, the coupling groove 24 is formed in the central portion of the groove portion 23 so that the ball 25 is mounted. At this time, the ball 25 is the shaft of the motor (3) inserted through the through hole 11 of the discharge case 10 is coupled with the impeller (1), the shaft of the motor (3) coupled with the impeller (1) The end portion is in contact with the inner surface of the suction case 20, in which case the ball 25 of the metal material is coupled to prevent the inner surface of the suction case 20 from being damaged by the rotation of the shaft of the motor (3) The end portion of the shaft 25 and the motor 3 are in contact with each other.

In addition, a plurality of ball ribs 25a are formed on the inner circumferential surface of the coupling groove 24 to minimize the deformation of the inside of the suction case 20 by the ball 25 that is forcibly pressed into the center portion, and the ball ribs ( 25 a) is formed radially (crosswise in the figure) about the ball 25 and makes contact with the ball 25.

In addition, one end surface of the suction case 20 (the surface on which the suction part 21 is formed) is forcibly pressed into the housing 4 to increase the allowable stress so that the case 2 is not deformed. 2) a plurality of ribs 26 are formed radially about the center portion to prevent deformation of the case 2 (the case 2 is formed of a plastic resin material and the strength thereof is weak), and the ribs 26 and the ribs 26 are formed. Auxiliary rib 29 is further formed between the ().

In this case, the auxiliary ribs 29 are connected between the ribs and the ribs so that the overall shape is circular, and the height of the auxiliary ribs 29 and the upper surface of the suction case 20 is the same.

In addition, the outer circumferential surface of the suction case 20 is formed to protrude in the circumferential direction, the indentation portion 27 is in direct contact with the inner circumferential surface of the housing 4 and pressed. In this case, the thickness B of the press-fit part 27 is 30% to prevent the suction case 20 from being deformed by the forced press-in of the housing 4 in preparation for the thickness A of the outer circumferential surface of the suction case 20. It is formed with the following thickness (B).

Here, one end surface (surface formed with the suction portion 21) of the suction case 20 discharge hole so that bubbles or gas generated from the fuel transported through the suction flow passage 22 formed in the inner surface is discharged to the outside 28 is formed, the discharge hole 28 is formed between the plurality of ribs 26 formed on one end surface of the suction case 20 of the suction flow path 22 formed on the inner surface of the suction case 20 It is formed in communication with one end.

As described above, the impeller case for an automobile fuel pump of the present invention is formed of a plastic resin material, and thus a small error range of dimensions during processing increases processing accuracy, thereby shortening processing time, and thus surface treatment. There is no need to reduce the production cost.

In addition, the case formed of a plastic resin of the present invention is composed of a discharge case and a suction case, the outer case is formed in multiple stages in the discharge case is formed with a protrusion along the outer circumferential surface, one end surface of the discharge case in the same line as the protrusion A groove is formed, and the suction case has a plurality of ribs formed at one end thereof, a press-in part protruding at a predetermined interval from the outer circumferential surface thereof, a groove formed at the center of the inner surface, and a coupling groove and a ball formed at the center of the groove. As the internal stress increases, the case is forced to press the inside of the housing, thereby minimizing the deformation caused by the load and impact generated.

Claims (4)

In the case (2) forcibly pressed into the housing (4) of the fuel pump so that the impeller (1), which is coupled to the motor (3) shaft of the automobile fuel pump and rotates, is installed therein. The through hole 11 is formed in the center of one end surface so that the shaft of the motor 3 penetrates and is coupled to the impeller 1, and a discharge part penetrated inside and discharged to discharge fuel introduced by the impeller 1. 13 is formed at one end surface, and a discharge flow passage 14 is formed in the circumferential direction on the inner surface so that fuel is smoothly discharged to the discharge portion 13 by the rotation of the impeller 1, thereby connecting to the discharge portion 13. A discharge case 10 formed on the outer circumferential surface with a stepped portion 15; The suction part 21 coupled to the discharge case 10 accommodates the impeller 1, and the suction part 21 penetrated therein so as to introduce fuel into the inside by the impeller 1 is formed at one end surface thereof, and the impeller 1 The suction flow passage 22 is formed in the circumferential direction of the inner surface circumferentially so that the fuel is transmitted to the whole of the impeller 1 by the rotation of the) and consists of the suction case 20 connected to the suction portion 21, The case 2 is formed of a plastic resin material in order to increase the precision of the dimensions according to the processing, when the case 2 formed of the plastic resin material is forcibly pressed into the housing 4 of the fuel pump, the case (2) A plurality of protrusions 16 spaced apart at predetermined intervals in the circumferential direction are formed on the outer circumferential surface of the stepped portion 15 of the discharge case 10 to prevent deformation of the inside of the discharge case 10, and the discharge case is in line with the protrusion 16. An impeller case for an automobile fuel pump, characterized in that a plurality of grooves (12) are formed on one end surface of the (10) to alleviate the impact generated when forcibly indenting the housing (4). The method of claim 1, In order to increase the allowable stress so that the case (2) does not deform when forcibly pressed into the housing (4), The outer circumferential surface of the suction case 20 protrudes in the circumferential direction, and one end surface of the suction case 20 in which the suction part 21 is formed is radially centered around a central portion of the plurality of ribs 26. ) Is formed to protrude, the impeller case for an automotive fuel pump, characterized in that the secondary rib (29) is further formed between the rib (26) and the rib (26). The method of claim 2, The thickness B of the press-fit part 27 is formed to have a thickness of 1/10 to prevent deformation by forced press-in of the housing 4 in contrast to the thickness A of the outer circumferential surface of the suction case 20. Impeller case for car fuel pump. The method according to claim 1 or 2, The inner surface of the suction case 20 has a groove portion 23 is formed so that the center portion is recessed, a coupling groove 24 is formed in the center portion of the groove portion 23 so that the ball 25 is mounted, the ball ( Impeller case for a vehicle fuel pump, characterized in that a plurality of radial ribs (25a) is formed around the center (25).

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