Automobile fuel pump

Abstract

The utility model discloses an automobile fuel pump which comprises an upper cover, an impeller and a lower cover, the impeller is installed between the upper cover and the lower cover, oil grooves are correspondingly formed in the upper cover and the lower cover, an oil inlet hole communicated with one end of each oil groove is formed in the lower cover, and an oil outlet hole communicated with the other end of each oil groove is formed in the upper cover. The impeller is characterized in that a positioning ring is arranged between the upper cover and the lower cover, the positioning ring, the upper cover and the lower cover are arranged in a split mode, the upper end face and the lower end face of the positioning ring are attached to the lower end face of the upper cover and the upper end face of the lower cover in a sealed mode respectively, and an impeller installation cavity is defined by the positioning ring between the upper cover and the lower cover. The positioning ring is arranged in a split mode, machining forming is facilitated, machining precision is improved, and production benefits are improved.

Description

Technical Field

[0001] The utility model relates to an improved invention of automobile parts, in particular to an improved invention of an automobile fuel pump. Background Art

[0002] The traditional automobile fuel pump is composed of three components: an upper cover, an impeller and a lower cover. A positioning ring is arranged between the upper cover and the lower cover. The positioning ring is integrally formed on the upper cover or the lower cover, resulting in increased processing and forming difficulty, reduced precision, increased waste and increased cost, seriously affecting production efficiency. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an automobile fuel pump that is convenient for processing and forming.

[0004] To solve the above technical problem, the utility model is realized by adopting the following technical scheme: The automobile fuel pump includes an upper cover, an impeller and a lower cover. The impeller is installed between the upper cover and the lower cover. Corresponding oil grooves are provided on the upper cover and the lower cover. An oil inlet hole communicating with one end of the oil groove is provided on the lower cover, and an oil outlet hole communicating with the other end of the oil groove is provided on the upper cover. It is characterized in that: A positioning ring is arranged between the upper cover and the lower cover. The positioning ring is separately arranged from the upper cover and the lower cover. The upper and lower end faces of the positioning ring are respectively sealed and attached to the lower end face of the upper cover and the upper end face of the lower cover. The positioning ring encloses an impeller installation cavity between the upper cover and the lower cover.

[0005] The impeller includes a wheel disc and ladle-shaped blades arranged in an annular groove of the wheel disc.

[0006] The outer diameter of the positioning ring is equal to the maximum outer diameter of the upper cover and the lower cover. Accordingly, the upper cover, the positioning ring and the lower cover are axially and radially limited and installed in the shell in a matching manner.

[0007] Axially arranged anti-rotation grooves are respectively provided on the outer circles of the upper cover, the lower cover and the positioning ring. Anti-rotation strips are provided on the inner wall of the corresponding shell. The anti-rotation grooves can be axially sleeved on the anti-rotation strips.

[0008] The beneficial effect of the utility model is that for the improved automobile fuel pump, the positioning ring is separately arranged, simplifying the processing structure, facilitating processing and forming and improving processing precision, and improving production efficiency. Brief Description of the Drawings

[0009] The following further details the specific implementation manners of the utility model with reference to the drawings.

[0010] Figure 1 It is a schematic structural view of the utility model.

[0011] Figure 2 It is a bottom view of the structure of the utility model.

[0012] Figure 3 For the present utility model Figure 2 is the A-A cross-sectional view.

[0013] Figure 4 is the structural schematic diagram of the impeller of the present utility model. Specific embodiments

[0014] The accompanying drawings show the structure of the present utility model, and the relevant details will be further described below in conjunction with the accompanying drawings. In this embodiment, referring to the accompanying Figures 1-4 , the automotive fuel pump includes an upper cover 1, an impeller 2 and a lower cover 3. The impeller 2 is installed between the upper cover 1 and the lower cover 3. Oil grooves 4 are provided on the corresponding upper cover 1 and lower cover 3. An oil inlet hole 31 communicating with one end of the oil groove 4 is provided on the lower cover 3, and an oil outlet hole 11 communicating with the other end of the oil groove 4 is provided on the upper cover 1. A positioning ring 5 is provided between the upper cover 1 and the lower cover 3. The positioning ring 5 is separately provided from the upper cover 1 and the lower cover 3. The upper and lower end faces of the positioning ring 5 are respectively sealed and attached to the lower end face of the upper cover 1 and the upper end face of the lower cover 3. The positioning ring 5 encloses an impeller 2 installation cavity 6 between the upper cover 1 and the lower cover 3 for the impeller 2 to be fitted and installed.

[0015] The present utility model improves the positioning ring 5 which is integrally formed on the upper cover 1 or the lower cover 3 in the prior art into a separate type, simplifies the processing structure, facilitates processing and improves processing accuracy, and improves production efficiency. In addition, the working principle of using the impeller 2 to pressurize and pump oil is the prior art and will not be described in detail here.

[0016] As a further improved specific embodiment, the impeller 2 includes a wheel disc 21 and spoon-shaped blades 22 annularly arranged in the annular groove of the wheel disc 21. Compared with the traditional flat blades, the spoon-shaped blades improve the oil pumping efficiency.

[0017] As a further improved specific embodiment, the outer diameter of the positioning ring 5 is equal to the maximum outer diameter of the upper cover 1 and the lower cover 3. Correspondingly, the upper cover 1, the positioning ring 5 and the lower cover 3 are axially and radially limited and fitted and installed in the shell body, and the upper cover 1, the positioning ring 5 and the lower cover 3 are pressed tightly to realize the seal between the positioning ring 5 and the upper cover 1 and the lower cover 3. That is, after the separate type is set, there is no need to additionally provide a connecting structure.

[0018] As a further improved specific embodiment, axially arranged anti-rotation grooves are respectively provided on the outer circles of the upper cover 1, the lower cover 3 and the positioning ring 5. Anti-rotation strips are provided on the inner wall of the corresponding shell body. The anti-rotation grooves can be axially sleeved on the anti-rotation strips to limit the rotation of the upper cover 1, the lower cover 3 and the positioning ring 5 in the shell body.

[0019] In summary, the above is only the preferred embodiment of the present utility model and is not intended to limit the protection scope of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An automotive fuel pump, comprising an upper cover, an impeller and a lower cover. The impeller is installed between the upper cover and the lower cover. Corresponding oil grooves are provided on the upper cover and the lower cover. An oil inlet hole communicating with one end of the oil groove is provided on the lower cover, and an oil outlet hole communicating with the other end of the oil groove is provided on the upper cover. It is characterized in that: A positioning ring is provided between the upper cover and the lower cover. The positioning ring is separately arranged from the upper cover and the lower cover. The upper and lower end faces of the positioning ring are respectively sealed and attached to the lower end face of the upper cover and the upper end face of the lower cover. The positioning ring encloses an impeller installation cavity between the upper cover and the lower cover.

2. The automotive fuel pump according to claim 1, characterized in that: The impeller includes a wheel disc and ladle-shaped blades annularly arranged in the annular groove of the wheel disc.

3. The automotive fuel pump according to claim 1, characterized in that: The outer diameter of the positioning ring is equal to the maximum outer diameter of the upper cover and the lower cover. Accordingly, the upper cover, the positioning ring and the lower cover are axially and radially limited and matched for installation in the shell.

4. The automotive fuel pump according to claim 3, characterized in that: Axially arranged anti-rotation grooves are respectively provided on the outer circles of the upper cover, the lower cover and the positioning ring. Anti-rotation strips are provided on the corresponding inner wall of the shell. The anti-rotation grooves can be axially sleeved on the anti-rotation strips.

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