External pump assembly

Abstract

The utility model discloses an external pump assembly which comprises a pump body, an upper cover, a pump core and a pressure regulating valve, the pump core and the pressure regulating valve are arranged in the pump body, an oil return cavity is formed between the pump core and the pump body, an oil return nozzle is fixed at the bottom of the oil return cavity, an oil inlet nozzle is arranged at the bottom of the pump core, the oil inlet nozzle penetrates through the pump body downwards and extends out of the pump body, and the pressure regulating valve is arranged in the oil return cavity. The upper cover is provided with an oil outlet nozzle at the oil outlet end of the top of the pump core, the oil outlet nozzle is provided with an oil return pipeline connected with the oil inlet end of the top of the pressure regulating valve, and the oil outlet end of the bottom of the pressure regulating valve is connected with the oil return cavity. When the pressure regulating valve returns oil, fuel oil can return to the oil tank from the oil return cavity, so that hot oil leaves the pump body assembly to achieve the purpose of heat dissipation, meanwhile, installation can be facilitated through the installation hole in the pump body, and installation cost and difficulty are reduced.

Description

Technical Field

[0001] The utility model relates to an external pump assembly. Background Art

[0002] The electric fuel pump assembly is one of the basic components of the fuel supply system of the electronic fuel injection system. Its function is to extract fuel from the fuel tank, pressurize it, and then deliver it to the engine of motorcycles, general machinery, etc.

[0003] At present, the external fuel pump has the following disadvantages: 1. When the pressure regulating valve returns the oil, the hot oil is in the pump body, which will cause poor heat dissipation; 2. A fixing plate is required during installation, which makes the installation complicated and costly. Utility Model Content

[0004] In view of the above problems, the utility model provides an external pump assembly, which effectively solves the problems pointed out in the background technology.

[0005] The technical solution adopted by the utility model is:

[0006] An external pump assembly comprises a pump body and an upper cover, as well as a pump core and a pressure regulating valve arranged in the pump body, an oil return chamber is formed between the pump core and the pump body, an oil return nozzle is fixed to the bottom of the oil return chamber, an oil inlet nozzle is arranged at the bottom of the pump core, the oil inlet nozzle passes downward through the pump body and extends out of the pump body, an oil outlet nozzle is arranged at the top oil outlet end of the pump core of the upper cover, an oil return pipeline connected to the oil inlet end at the top of the pressure regulating valve is arranged on the oil outlet nozzle, and the oil outlet end at the bottom of the pressure regulating valve is connected to the oil return chamber.

[0007] Preferably, at least two mounting holes are formed on the side of the pump body.

[0008] Preferably, the pressure regulating valve is located at the upper part of the pump body.

[0009] When the pressure regulating valve returns oil, the utility model can return the fuel to the fuel tank from the oil return chamber, so that the hot oil leaves the pump body assembly to achieve the purpose of heat dissipation. At the same time, it can be easily installed through the installation hole on the pump body, reducing the installation cost and difficulty.

[0010] When the utility model is in use, the oil tank is communicated with the atmosphere, so the air in the pump body can be discharged when oiling, the oiling speed is increased, and the engine can be started quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 It is a longitudinal sectional view of the utility model. DETAILED DESCRIPTION

[0013] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0014] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0015] In addition, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0016] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0017] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0019] The present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0020] like Figure 1-2 As shown, an external pump assembly includes a pump body 1 and an upper cover 2, as well as a pump core 3 and a pressure regulating valve 4 arranged in the pump body 1, an oil return chamber 5 is formed between the pump core 3 and the pump body 1, an oil return nozzle 6 is fixed to the bottom of the oil return chamber 5, an oil inlet nozzle 7 is provided at the bottom of the pump core 3, and the oil inlet nozzle 7 extends downward through the pump body 1 to the outside of the pump body 1, the upper cover 2 is provided with an oil outlet nozzle 8 at the top oil outlet end of the pump core 3, and the oil outlet nozzle 8 is provided with an oil return pipeline 9 connected to the oil inlet end of the top of the pressure regulating valve 4, and the oil outlet end at the bottom of the pressure regulating valve 4 is connected to the oil return chamber 5.

[0021] At least two mounting holes 10 are formed on the side of the pump body 1 .

[0022] The pressure regulating valve 4 is located at the upper part of the pump body 1 .

[0023] When the utility model is installed, it is fixedly installed through the installation hole 10, the oil inlet nozzle 7 is connected to the bottom of the oil tank, the oil return nozzle 6 is connected to the top of the oil tank, and the oil outlet nozzle 8 is connected to the engine. Its working principle is as follows:

[0024] The fuel in the fuel tank enters the pump core 3 from the fuel inlet nozzle 7, and is sent out from the fuel outlet nozzle 8 through the pump core 3. When sending out, the pressure regulating valve 4 adjusts the pressure and sends the excess fuel back to the oil return chamber 5 from the oil return pipeline 9. The fuel in the oil return chamber 5 is discharged from the oil return nozzle 6 and sent back to the fuel tank, so that the pump body can be well cooled.

[0025] The utility model sets the cross section of the sealing gasket 3 to be L-shaped and matches the flange cover 2, so that the radial sealing ring 31 is mainly used for sealing, avoiding the plane sealing surface with poor flatness of the oil tank, and playing a good sealing role. At the same time, the plane sealing ring 32 is used for auxiliary sealing, thus forming a double seal with a better sealing effect.

[0026] Finally, it should be noted that the above examples are only specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and there are many variations. All variations that can be directly derived or associated with the content disclosed by a person skilled in the art from the present invention should be considered as the protection scope of the present invention.

Claims

1. An external pump assembly, characterized in that: The invention comprises a pump body (1) and an upper cover (2), and a pump core (3) and a pressure regulating valve (4) arranged in the pump body (1); an oil return chamber (5) is formed between the pump core (3) and the pump body (1); an oil return nozzle (6) is fixed at the bottom of the oil return chamber (5); an oil inlet nozzle (7) is provided at the bottom of the pump core (3); the oil inlet nozzle (7) passes downward through the pump body (1) and extends outside the pump body (1); an oil outlet nozzle (8) is provided at the top oil outlet end of the pump core (3); an oil return pipeline (9) connected to the oil inlet end at the top of the pressure regulating valve (4) is provided on the oil outlet nozzle (8); and the oil outlet end at the bottom of the pressure regulating valve (4) is connected to the oil return chamber (5).

2. An external pump assembly according to claim 1, characterized in that: At least two mounting holes (10) are provided on the side of the pump body (1).

3. The external pump assembly according to claim 1, characterized in that: The pressure regulating valve (4) is located at the upper part of the pump body (1).

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