High-pressure fuel pump of automobile engine

Abstract

The utility model provides an automobile engine fuel oil high-pressure pump which comprises a pump body, and one end of the pump body is connected with one end of a connecting hose and is sealed in the circumferential direction. An annular step is arranged on the outer wall of one end of the pump body, and one end of the connecting hose is inserted into the annular step and abuts against the bottom of the annular step. An annular groove is formed in the side wall of the annular step, a sealing ring is embedded in the annular groove, the sealing ring is tightly attached to the side wall of the annular groove and the inner wall of the connecting hose in a sealed mode, and one end of the connecting hose is tightly held at one end of the pump body through a hose clamp. A first annular reverse buckle is arranged on the side wall of the annular step located above the annular groove and is in tight fit with the inner wall of one end of the connecting hose. A second annular reverse buckle is arranged on the side wall of the annular step located below the annular groove and is in tight fit with the inner wall of one end of the connecting hose. The condition that one end of the connecting hose is separated from one end of the pump body can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a high-pressure fuel pump for an automobile engine. Background Art

[0002] The automobile engine fuel high-pressure pump is an important component of the automobile fuel supply system. The automobile engine fuel high-pressure pump currently on the market includes a pump body. When the automobile engine fuel high-pressure pump is in use, one end of the pump body needs to be connected to one end of the connecting hose and circumferentially sealed; and an annular step is provided on the outer wall of one end of the pump body of the existing automobile engine fuel high-pressure pump, and one end of the connecting hose is inserted into the annular step and abuts against the bottom of the annular step; an annular groove is provided on the side wall of the annular step, and a sealing ring is embedded in the annular groove. The sealing ring is tightly sealed with the side wall of the annular groove and the inner wall of the connecting hose, and a throat clamp is connected to the outside of one end of the connecting hose, and one end of the connecting hose is clamped on one end of the pump body by the throat clamp; however, in the above structure, since the side wall of the annular step is a smooth side wall, there is a disadvantage of low friction between the connecting hose and the pump body, that is, there is a disadvantage of poor connection firmness between the connecting hose and the pump body, which can easily cause the connecting hose to detach from the pump body, thereby causing fuel leakage, posing a great safety hazard. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a high-pressure fuel pump for an automobile engine, which can effectively prevent one end of a connecting hose from being separated from one end of a pump body.

[0004] The utility model provides a high-pressure fuel pump for an automobile engine, comprising a pump body, one end of the pump body being connected to one end of a connecting hose and circumferentially sealed; an annular step is provided on the outer wall of one end of the pump body, one end of the connecting hose is inserted into the annular step and abuts against the bottom of the annular step; an annular groove is provided on the side wall of the annular step, a sealing ring is embedded in the annular groove, the sealing ring is tightly sealed to the side wall of the annular groove and the inner wall of the connecting hose, a throat clamp is sleeved on the outside of one end of the connecting hose, and one end of the connecting hose is tightly clamped to one end of the pump body by the throat clamp; a first annular undercut is provided on the side wall of the annular step above the annular groove, the first annular undercut is tightly fitted with the inner wall of one end of the connecting hose; a second annular undercut is provided on the side wall of the annular step below the annular groove, the second annular undercut is tightly fitted with the inner wall of one end of the connecting hose.

[0005] By adopting the above structure, the utility model can increase the friction between one end of the connecting hose and one end of the pump body under the action of the first annular undercut and the second annular undercut after the throat clamp clamps one end of the connecting hose to one end of the pump body, that is, it can improve the fixing firmness of one end of the connecting hose and one end of the pump body, thereby effectively preventing one end of the connecting hose from being separated from one end of the pump body.

[0006] In one possible embodiment, a plurality of first annular undercuts are provided on the side wall of the annular step located above the annular groove, and the plurality of first annular undercuts are spaced apart along the axial direction of the pump body, and each first annular undercut is tightly fitted with the inner wall of one end of the connecting hose; by providing a plurality of first annular undercuts on the side wall of the annular step located above the annular groove, and the plurality of first annular undercuts are spaced apart along the axial direction of the pump body, the friction between one end of the connecting hose and one end of the pump body can be further increased, that is, one end of the connecting hose can be further prevented from separating from one end of the pump body.

[0007] In one possible embodiment, a plurality of second annular undercuts are provided on the side wall of the annular step located below the annular groove, and the plurality of second annular undercuts are spaced apart along the axial direction of the pump body, and each second annular undercut is tightly fitted with the inner wall of one end of the connecting hose; by providing a plurality of second annular undercuts on the side wall of the annular step located below the annular groove, and the plurality of second annular undercuts are spaced apart along the axial direction of the pump body, the friction between one end of the connecting hose and one end of the pump body can be further increased, that is, one end of the connecting hose can be further prevented from being separated from one end of the pump body.

[0008] In one possible embodiment, an annular conical surface is provided on the outer wall of one end of the pump body, and the annular conical surface is used to cooperate and guide with the inner wall of one end of the connecting hose so that one end of the connecting hose can be inserted into the annular step; after the annular conical surface is provided on the outer wall of one end of the pump body, when one end of the connecting hose is cooperated and plugged into the annular step, the annular conical surface can cooperate and guide with the inner wall of one end of the connecting hose so that one end of the connecting hose can be inserted into the annular step, that is, it can facilitate the cooperation and plugging of one end of the connecting hose with the annular step.

[0009] In one possible embodiment, a limiting groove is provided on the outer wall of the pump body, and the limiting groove is used to engage with the limiting protrusion on the oil tank to achieve the limitation of the pump body and the oil tank; after the limiting groove is provided on the outer wall of the pump body, the limiting groove can be engaged with the limiting protrusion on the oil tank, thereby achieving the limitation of the pump body and the oil tank, that is, it can facilitate the assembly of the pump body and the oil tank, and can improve the reliability of the pump body and the oil tank after assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1This is a schematic diagram of the cross-sectional structure of the pump body and the connecting hose after assembly;

[0011] Figure 2 for Figure 1 The schematic diagram of the structure after enlarging at A in the middle;

[0012] Figure 3 It is a schematic diagram of the three-dimensional structure of the pump body. DETAILED DESCRIPTION

[0013] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Those skilled in the art may adjust them as needed to suit specific application scenarios.

[0014] In the description of the embodiments of this application, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.

[0015] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0016] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] See also Figure 1-3As shown, the embodiment of the present application discloses a high-pressure fuel pump for an automobile engine, comprising a pump body 1, one end of the pump body 1 is connected to one end of a connecting hose 2 and is circumferentially sealed; an annular step 11 is provided on the outer wall of one end of the pump body 1, one end of the connecting hose 2 is inserted into the annular step 11 and abuts against the bottom of the annular step 11; an annular groove 12 is provided on the side wall of the annular step 11, a sealing ring 3 is embedded in the annular groove 12, the sealing ring 3 is tightly sealed to the side wall of the annular groove 12 and the inner wall of the connecting hose 2, a throat clamp 4 is sleeved on the outside of one end of the connecting hose 2, and one end of the connecting hose 2 is tightly clamped to one end of the pump body 1 through the throat clamp 4; a first annular undercut 13 is provided on the side wall of the annular step 11 above the annular groove 12, and the first annular undercut 13 is tightly fitted with the inner wall of one end of the connecting hose 2; a second annular undercut 14 is provided on the side wall of the annular step 11 below the annular groove 12, and the second annular undercut 14 is tightly fitted with the inner wall of one end of the connecting hose 2.

[0018] A plurality of first annular undercuts 13 are provided on the side wall of the annular step 11 located above the annular groove 12. The plurality of first annular undercuts 13 are arranged at intervals along the axial direction of the pump body 1, and each first annular undercut 13 is tightly fitted with the inner wall of one end of the connecting hose 2. By providing a plurality of first annular undercuts on the side wall of the annular step located above the annular groove, and the plurality of first annular undercuts are arranged at intervals along the axial direction of the pump body, the friction between one end of the connecting hose and one end of the pump body can be further increased, that is, one end of the connecting hose can be further prevented from detaching from one end of the pump body.

[0019] A plurality of second annular undercuts 14 are provided on the side wall of the annular step 11 below the annular groove 12. The plurality of second annular undercuts 14 are spaced apart along the axial direction of the pump body 1, and each second annular undercut 14 is tightly fitted with the inner wall of one end of the connecting hose 2. By providing a plurality of second annular undercuts on the side wall of the annular step below the annular groove, and spaced apart along the axial direction of the pump body, the friction between one end of the connecting hose and one end of the pump body can be further increased, that is, one end of the connecting hose can be further prevented from detaching from one end of the pump body.

[0020] An annular conical surface 15 is provided on the outer wall of one end of the pump body 1, and the annular conical surface 15 is used to cooperate and guide with the inner wall of one end of the connecting hose 2 so that one end of the connecting hose 2 can be inserted into the annular step 11; after the annular conical surface is provided on the outer wall of one end of the pump body, when one end of the connecting hose is cooperated and plugged into the annular step, the annular conical surface can cooperate and guide with the inner wall of one end of the connecting hose so that one end of the connecting hose can be inserted into the annular step, that is, it can facilitate the cooperation and plugging of one end of the connecting hose with the annular step.

[0021] A limiting groove 16 is provided on the outer wall of the pump body 1, and the limiting groove 16 is used to engage with the limiting protrusion on the oil tank to achieve the limitation of the pump body 1 and the oil tank; after the limiting groove is provided on the outer wall of the pump body, the limiting groove can be engaged with the limiting protrusion on the oil tank, thereby achieving the limitation of the pump body and the oil tank, that is, it can facilitate the assembly of the pump body and the oil tank, and can improve the reliability of the pump body and the oil tank after assembly.

[0022] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A high-pressure fuel pump for an automobile engine, comprising a pump body (1), one end of the pump body (1) being connected to one end of a connecting hose (2) and circumferentially sealed; an annular step (11) is provided on the outer wall of one end of the pump body (1), one end of the connecting hose (2) is inserted into the annular step (11) and abuts against the bottom of the annular step (11); an annular groove (12) is provided on the side wall of the annular step (11), a sealing ring (3) is embedded in the annular groove (12), the sealing ring (3) is tightly sealed to the side wall of the annular groove (12) and the inner wall of the connecting hose (2), a throat clamp (4) is sleeved on the outside of one end of the connecting hose (2), and one end of the connecting hose (2) is tightly clamped to one end of the pump body (1) through the throat clamp (4); and the characteristics are: A first annular undercut (13) is provided on the side wall of the annular step (11) above the annular groove (12), and the first annular undercut (13) is tightly fitted with the inner wall of one end of the connecting hose (2); a second annular undercut (14) is provided on the side wall of the annular step (11) below the annular groove (12), and the second annular undercut (14) is tightly fitted with the inner wall of one end of the connecting hose (2).

2. The automobile engine fuel high-pressure pump according to claim 1, characterized in that: A plurality of first annular undercuts (13) are provided on the side wall of the annular step (11) above the annular groove (12). The plurality of first annular undercuts (13) are spaced apart along the axial direction of the pump body (1), and each first annular undercut (13) is tightly fitted with the inner wall of one end of the connecting hose (2).

3. The automobile engine fuel high-pressure pump according to claim 1, characterized in that: A plurality of second annular undercuts (14) are provided on the side wall of the annular step (11) below the annular groove (12). The plurality of second annular undercuts (14) are spaced apart along the axial direction of the pump body (1), and each second annular undercut (14) is tightly fitted with the inner wall of one end of the connecting hose (2).

4. The automobile engine fuel high-pressure pump according to any one of claims 1 to 3, characterized in that: An annular conical surface (15) is provided on the outer wall of one end of the pump body (1), and the annular conical surface (15) is used to cooperate with the inner wall of one end of the connecting hose (2) to guide the one end of the connecting hose (2) so that the one end of the connecting hose (2) can be inserted into the annular step (11).

5. The automobile engine fuel high-pressure pump according to any one of claims 1 to 3, characterized in that: A limiting groove (16) is provided on the outer wall of the pump body (1), and the limiting groove (16) is used to engage with a limiting protrusion on the oil tank to achieve limiting of the pump body (1) and the oil tank.

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