CN216767615U

CN216767615U - Push rod for fuel pump of automobile engine

Info

Publication number: CN216767615U
Application number: CN202220723797.8U
Authority: CN
Inventors: 苏辰鸣
Original assignee: Zhejiang Donghe Electromechanical Manufacturing Co ltd
Current assignee: Zhejiang Donghe Electromechanical Manufacturing Co ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-06-17
Anticipated expiration: 2032-03-31

Abstract

The utility model provides a push rod for a fuel pump of an automobile engine, and belongs to the technical field of fuel pump accessories. It has solved the current poor, the short problem of life of fuel pump structural stability. This push rod for automobile engine fuel pump includes the body, this internal piston that has the slip assembly, the open end of body can be dismantled and link firmly the end cover that forms closed cavity with the body, the piston rod of piston runs through the end cover and extends to this external, have on the piston rod of piston with the oil feed passageway of closed cavity intercommunication, be provided with the oil outlet on the body, be provided with on the piston between oil feed passageway and the oil outlet through the piston on the body reciprocating sliding and make the fluid in the oil feed passageway get into closed cavity and will close the conversion equipment of the interior fluid follow oil outlet extrusion of cavity. The utility model has reasonable and simple structural design, stable structure, long service life and convenient use, and the liquid leakage condition is not easy to occur in the body.

Description

Push rod for fuel pump of automobile engine

Technical Field

The utility model belongs to the technical field of fuel pump accessories, and relates to a push rod for a fuel pump of an automobile engine.

Background

The engine fuel pump generally includes the pump body, is equipped with oil inlet, oil-out on the pump body, is equipped with the pressure stabilizing cavity in the pump body, and oil inlet, oil-out all are linked together with the pressure stabilizing cavity, and the pump body mainly carries out work through the fluid relative flow effect of oil inlet, oil-out and pressure stabilizing cavity. For example, chinese patent document patent discloses a high-pressure fuel pump of direct injection in a cylinder [ application number: 201520524168.2; authorization notice number: CN204827743U ], an oil inlet communicated with the first connecting oil passage and an oil outlet communicated with the second connecting oil passage are arranged on the valve seat in the pump body, a connecting hole is arranged between the oil inlet and the oil outlet, a steel ball is arranged below the valve rod, a compression spring is arranged between the steel ball and the bottom of the valve seat, the steel ball is pressed on the lower end face of the valve rod by the compression spring, and a sealing surface matched with the outer wall of the steel ball is arranged on the inner wall of the lower end of the connecting hole.

In foretell structure, fluid between inlet port and the oil outlet carries out interconversion through the sealed face on steel ball and the connecting hole lower extreme inner wall, and the sealed effect of this steel ball and sealed face is not very good, and when sealed cooperation, there is the clearance easily, the condition that appears fluid and leak, structural stability is poor, and life is short.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provides the push rod for the fuel pump of the automobile engine, which has a simple and stable structure and is not easy to leak oil.

The purpose of the utility model can be realized by the following technical scheme: the utility model provides a push rod for automobile engine fuel pump, is including being cask form body, this internal piston that has the slip assembly, the open end of body can dismantle and link firmly the end cover that forms closed cavity with the body, the piston rod of piston run through the end cover and extend to this external, its characterized in that, the piston rod of piston on have with the oil feed passageway of closed cavity intercommunication, the body on be provided with the oil outlet, oil feed passageway and oil outlet between the piston on be provided with through the piston reciprocating sliding on the body and make the fluid in the oil feed passageway get into closed cavity and will close the conversion equipment of the interior fluid of cavity from the oil outlet extrusion.

The conversion device arranged on the push rod for the fuel pump of the automobile engine has good sealing performance, so that the oil is not easy to leak when being converted from the oil inlet channel to the oil outlet in the closed cavity, the structural stability is high, and the service life is long; during actual production and assembly, the piston rod of the piston penetrates through the end cover and slides relative to the end cover, and the piston rod of the piston and the end cover slide in a clearance fit mode.

In the push rod for the fuel pump of the automobile engine, the conversion device comprises a pressure plate, a guide post parallel to an oil inlet channel of a piston rod of the piston is arranged on the inner end face of the piston, the pressure plate is assembled on the guide post in a sliding mode, when the piston moves downwards in a closed cavity of the body, the pressure plate and the piston are abutted against and matched in a sealing mode, and when the piston moves upwards in the closed cavity of the body, the pressure plate and the piston are matched at intervals. The inner end face of the pressing plate and the outer end face of the piston are in opposite abutting fit with the plane through opposite planes, and the pressing plate is good in sealing performance and stable in structure when abutting against the plane.

In the push rod for the automobile engine fuel pump, the inner end face of the piston opposite to the pressing plate is provided with an adjusting groove, the guide post is vertically and fixedly assembled in the corresponding adjusting groove, the guide post in the adjusting groove is sleeved with the compression spring, and the compression spring elastically acts on the pressing plate. The purpose of this is: the piston moves upwards in the closed cavity of the body, and the compression spring elastically pre-supports the pressure plate, so that the pressure plate and the piston are quickly separated, and the structure is stable.

In the push rod for the fuel pump of the automobile engine, the middle position of the inner bottom surface of the body is provided with an inner convex part, the inner convex part is sleeved with a telescopic spring, and the telescopic spring elastically acts on the piston. The purpose of this arrangement is to accelerate the upward movement of the piston in the closed chamber of the body, with a stable construction.

In the push rod for the fuel pump of the automobile engine, the end cover is provided with an annular inward turned edge which is integrally formed with the end cover, and the annular inward turned edge of the end cover is in interference fit with the open end of the body. The purpose of setting up like this is convenient end cover relative sealed assembly on the body, and it is convenient to produce manufacturing.

In the push rod for the fuel pump of the automobile engine, the inner end face of the annular inward turning edge of the end cover is provided with the rubber sealing ring which is fixedly embedded, and the piston and the rubber sealing ring are abutted and matched in a sealing manner. The purpose of this arrangement is to ensure the effectiveness of the seal between the end cap and the piston, and to provide a stable construction.

In the push rod for the fuel pump of the automobile engine, the outer wall of the piston is embedded with the sealing ring, and the sealing ring of the piston is in sliding sealing fit with the inner wall of the body. The purpose of this arrangement is to ensure the effectiveness of the sealing between the piston and the body, to prevent the leakage of liquid between the piston and the body, and to provide a stable structure.

Compared with the prior art, the push rod for the fuel pump of the automobile engine has the advantages that: the structure design is reasonable and simple, the structure is stable, the liquid leakage is not easy to occur in the body, the service life is long, and the use is convenient.

Drawings

FIG. 1 is a schematic sectional view of a push rod for a fuel pump of an automobile engine.

In the figure, 1, a body; 2. a piston; 3. closing the chamber; 4. an end cap; 5. an oil inlet channel; 6. an oil outlet hole; 7. pressing a plate; 8. a guide post; 9. a compression spring; 10. an inner convex portion; 11. a tension spring; 12. an annular inward turning edge; 13. a rubber seal ring; 14. and (5) sealing rings.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1, this push rod for automobile engine fuel pump mainly comprises body 1 that is cask form, has slide assembly's piston 2 in the body 1, and the open end of body 1 can be dismantled and link firmly and form the end cover 4 of closed chamber 3 with body 1, and the piston rod of piston 2 runs through end cover 4 and extends to outside the body 1, have on the piston rod of piston 2 with the oil feed passageway 5 of closed chamber 3 intercommunication, be provided with oil outlet 6 on the body 1, be provided with on the piston 2 between oil feed passageway 5 and the oil outlet 6 through piston 2 reciprocating sliding on body 1 and make the fluid in the oil feed passageway 5 get into closed chamber 3 and with the conversion equipment of the fluid of closed chamber 3 extrusion from oil outlet 6.

In further detail, the specific implementation of the conversion device is as follows: the piston mainly comprises a pressure plate 7, a guide post 8 arranged in parallel to an oil inlet channel 5 of a piston rod of the piston 2 is arranged on the inner end surface of the piston 2, the pressure plate 7 is assembled on the guide post 8 in a sliding manner, when the piston 2 moves downwards in the closed cavity 3 of the body 1, the pressure plate 7 is in abutting sealing fit with the piston 2, and when the piston 2 moves upwards in the closed cavity 3 of the body 1, the pressure plate 7 is in spaced fit with the piston 2; an adjusting groove is formed in the inner end face of the piston 2 opposite to the pressing plate 7, the guide posts 8 are vertically and fixedly assembled in the corresponding adjusting grooves, the guide posts 8 in the adjusting grooves are sleeved with compression springs 9, and the compression springs 9 elastically act on the pressing plate 7.

An inner convex part 10 is arranged at the middle position of the inner bottom surface of the body 1, an extension spring 11 is sleeved on the inner convex part 10, and the extension spring 11 elastically acts on the piston 2; the inner end face of the annular inward-turned edge 12 of the end cover 4 is provided with a rubber sealing ring 13 which is fixedly embedded, and the piston 2 is in abutting and sealing fit with the rubber sealing ring 13; a sealing ring 14 is embedded on the outer wall of the piston 2, and the sealing ring 14 of the piston 2 is in sliding sealing fit with the inner wall of the body 1.

The end cover 4 and the open end of the body 1 are detachably and fixedly connected, and the specific implementation mode is as follows: the end cover 4 is provided with an annular turned-in edge 12 which is integrally formed with the end cover 4, and the annular turned-in edge 12 of the end cover 4 is in interference fit with the open end of the body 1.

Those not described in detail in this specification are within the skill of the art. The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Claims

1. A push rod for a fuel pump of an automobile engine comprises a barrel-shaped body (1), the body (1) is internally provided with a piston (2) which is assembled in a sliding way, the open end of the body (1) is detachably and fixedly connected with an end cover (4) which forms a closed cavity (3) with the body (1), a piston rod of the piston (2) penetrates through the end cover (4) and extends out of the body (1), characterized in that a piston rod of the piston (2) is provided with an oil inlet channel (5) communicated with the closed chamber (3), body (1) on be provided with oil outlet (6), piston (2) between oil feed passageway (5) and oil outlet (6) on be provided with through piston (2) reciprocating sliding on body (1) and make the fluid in oil feed passageway (5) get into and seal cavity (3) and with the conversion equipment of the fluid follow oil outlet (6) extrusion in the seal cavity (3).

2. The pushrod for an automobile engine fuel pump according to claim 1, wherein the switching device comprises a pressure plate (7), the inner end surface of the piston (2) is provided with a guide post (8) parallel to the oil inlet channel (5) of the piston rod of the piston (2), the pressure plate (7) is slidably mounted on the guide post (8), the pressure plate (7) and the piston (2) are in abutting sealing engagement when the piston (2) moves downward in the enclosed chamber (3) of the body (1), and the pressure plate (7) and the piston (2) are in spaced engagement when the piston (2) moves upward in the enclosed chamber (3) of the body (1).

3. The push rod for the fuel pump of the automobile engine is characterized in that an adjusting groove is formed in the inner end face, opposite to the pressure plate (7), of the piston (2), the guide post (8) is vertically and fixedly assembled in the corresponding adjusting groove, a compression spring (9) is sleeved on the guide post (8) in the adjusting groove, and the compression spring (9) elastically acts on the pressure plate (7).

4. The push rod for the fuel pump of the automobile engine is characterized in that an inner convex part (10) is arranged at the middle position of the inner bottom surface of the body (1), a telescopic spring (11) is sleeved on the inner convex part (10), and the telescopic spring (11) elastically acts on the piston (2).

5. The push rod for the fuel pump of the automobile engine is characterized in that the end cover (4) is provided with an annular turned-in edge (12) which is integrally formed with the end cover (4), and the annular turned-in edge (12) of the end cover (4) is in interference fit with the open end of the body (1).

6. The push rod for the fuel pump of the automobile engine is characterized in that a rubber sealing ring (13) fixedly embedded is arranged on the inner end face of the annular inward turning edge (12) of the end cover (4), and the piston (2) is in abutting and sealing fit with the rubber sealing ring (13).

7. The push rod for the fuel pump of the automobile engine is characterized in that a sealing ring (14) is embedded on the outer wall of the piston (2), and the sealing ring (14) of the piston (2) is in sliding sealing fit with the inner wall of the body (1).