CN215804890U

CN215804890U - Fuel flow choking structure of fuel pump

Info

Publication number: CN215804890U
Application number: CN202122332146.4U
Authority: CN
Inventors: 谯登江; 谯丹
Original assignee: Wenzhou Tianqi Auto Parts Co ltd
Current assignee: Wenzhou Tianqi Auto Parts Co ltd
Priority date: 2021-09-26
Filing date: 2021-09-26
Publication date: 2022-02-11
Anticipated expiration: 2031-09-26

Abstract

The utility model discloses a fuel flow resisting structure of a fuel pump, which comprises an upper end cover, wherein an oil outlet pipeline is arranged on the upper end cover, an annular valve seat is installed at the inlet of the oil outlet pipeline, a one-way valve core made of fluororubber is embedded in the oil outlet pipeline in a clamped mode, the one-way valve core comprises a base, a valve rod and a blocking head, the tail end of the valve rod is connected with the base, the end part of the valve rod is connected with the blocking head, the end part of the blocking head is a dome, an abutting groove corresponding to the blocking head is formed in the end part of an inner hole of the valve seat, the dome end part of the blocking head abuts against the abutting groove, the outer peripheral wall of the base is embedded on the inner wall of the oil outlet pipeline in a clamped mode, and a through groove is formed in the one-way valve core. Therefore, the technical effects of ingenious structure, convenient and reliable assembly and stable performance are achieved.

Description

Fuel flow choking structure of fuel pump

Technical Field

The utility model relates to a component in an oil supply system of a motor vehicle, in particular to a fuel flow resisting structure of a fuel pump.

Background

A common fuel pump comprises an auxiliary fuel tank, a pump core is arranged in the auxiliary fuel tank, the pump core outputs fuel in the auxiliary fuel tank and is provided with a siphon structure, partial fuel output by the pump core generates siphon effect through the siphon structure to suck the fuel in the fuel tank into the auxiliary fuel tank, an upper end cover is arranged on an opening of the auxiliary fuel tank, as shown in figure 1, an oil outlet pipeline 11 for outputting the fuel is arranged on the upper end cover 1, a cavity 12 is arranged in the oil outlet pipeline 11, a one-way valve core 2 is arranged in the cavity 12, a spring 3 is arranged between the one-way valve core 2 and the inner wall of the cavity 12, an annular valve seat 4 is arranged at an inlet of the oil outlet pipeline 11, the one-way valve core 2 is abutted against an outlet of the valve seat 4 under the action of the spring 3, when the fuel passes through, the one-way valve core 2 is pushed open through the fuel pressure, after an engine is stopped, the one-way valve core 2 seals the outlet of the valve seat under the action of the spring, the fuel backflow can be prevented.

Owing to need install one-way case and spring in the cavity in above-mentioned structure for need guarantee the shaping precision of cavity when the shaping cavity, thereby ensure the trafficability characteristic of cavity, the installation of spring and one-way case needs artifical careful installation moreover, leads to the assembly efficiency low, and during operation simultaneously, the spring easily produces the pulsation and leads to abnormal sound such as squeaking, makes the performance unstable, and the pressurize performance is poor.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, an object of the present invention is to provide a fuel flow blocking structure of a fuel pump, which has a smart structure, is convenient and reliable to assemble, and has stable performance.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a fuel pump's fuel choked flow structure, includes the upper end cover, be equipped with oil outlet pipe on the upper end cover annular disk seat is installed to oil outlet pipe's entrance the oil outlet pipe in the inlay card have the check valve core of fluororubber material, this check valve core includes base, valve rod and plug head, the tail end of valve rod with the base is connected, the tip of valve rod with plug head connects, plug head's tip is the calotte, the hole tip of disk seat be equipped with the corresponding butt groove of plug head, the calotte tip butt of plug head on the butt groove, the periphery wall inlay card of base is in on oil outlet pipe's the inner wall be equipped with through the groove on the check valve core.

An annular retaining ring is arranged on the base, the valve rod penetrates through the retaining ring, and the through groove is arranged on the retaining ring and penetrates through the base.

The inner wall of the oil outlet pipeline is provided with an annular clamping groove, and the outer peripheral wall of the base is clamped in the clamping groove.

Compared with the prior structure in the background art, the structure of the utility model reduces spring parts, only the one-way valve core needs to be arranged in the oil outlet pipeline during assembly, and the blocking head on the one-way valve core is abutted against the valve seat, thereby greatly improving the assembly efficiency.

The utility model is further described with reference to the following figures and detailed description.

Drawings

FIG. 1 is a schematic diagram of a prior art fuel pump fuel flow restriction arrangement;

FIG. 2 is a schematic structural diagram of an embodiment of the present invention;

fig. 3 is an enlarged view of a in fig. 2.

Detailed Description

The following examples are given to illustrate the present invention and should not be construed as limiting the scope of the present invention.

As shown in fig. 2 and fig. 3, the present embodiment discloses a fuel flow resisting structure of a fuel pump, which includes an upper end cover 1, an oil outlet pipe 2 is arranged on the upper end cover 1, an annular valve seat 3 is installed at an inlet of the oil outlet pipe 2, a check valve core 4 made of fluororubber is embedded in the oil outlet pipe 2, the check valve core 4 includes a base 41, a valve rod 42 and a plug 43, a tail end of the valve rod 42 is connected with the base 41, an end of the valve rod 42 is connected with the plug 43, an end of the plug 43 is a dome, an inner hole end of the valve seat 3 is provided with an abutting groove 31 corresponding to the plug 43, the dome end of the plug 43 abuts against the abutting groove 31, an outer peripheral wall of the base 41 is embedded on an inner wall of the oil outlet pipe 2, a through groove 44 is arranged on the check valve core 4, and fuel can flow through the check valve core 4 through the through groove 44.

An annular retaining ring 411 is provided on the base 41, and the valve rod 42 is inserted through the retaining ring 411, is provided on the retaining ring 411 through the groove 44, and is inserted through the base 41. The root of the valve rod 42 can be kept straight as much as possible by the retaining ring 411, so that the bottom bending of the valve rod 42 can be reduced, the elastic force of the valve rod 42 is increased, the abutting between the plugging head 43 and the valve seat 3 is more compact and reliable, and the function of flow blocking of fuel backflow is achieved.

An annular clamping groove 21 is arranged on the inner wall of the oil outlet pipeline 2, and the outer peripheral wall of the base 41 is clamped in the clamping groove 21. The structure enables the base 41 and the oil outlet pipeline 2 to be matched more closely and reliably, so that the one-way valve core 4 is more convenient to install and reliable in positioning.

Adopt above-mentioned technical scheme, compare with the current structure in the background art, it has reduced the spring part, only need put into the one-way valve core 4 in the oil outlet pipeline 2 during the assembly, the jam head 43 on the one-way valve core 4 butt on disk seat 3 can, the efficiency of assembly is greatly improved, because the one-way valve core 4 is the fluororubber material, make it block up the hole of disk seat 3 through the elasticity of self, the pressurize nature is good, and in operating condition, the stable performance, it is steady, noiselessness to go out oil, so just, the technical effect ingenious structure has been realized, convenient assembling is reliable and the stable performance, fluororubber has heat resistance, oxidation resistance, oil resistance, corrosion resistance and the advantage of resistant atmospheric ageing nature simultaneously, effectively improve the stability and the life of one-way valve core 4 work.

Claims

1. The utility model provides a fuel pump's fuel choked flow structure, includes the upper end cover, be equipped with oil outlet pipeline on the upper end cover annular disk seat, its characterized in that are installed to oil outlet pipeline's entrance: the oil outlet pipeline in the one-way valve core that the inlay card has the fluororubber material, this one-way valve core includes base, valve rod and stopper head, the tail end of valve rod with the base is connected, the tip of valve rod with the stopper head is connected, the tip of stopper head is the calotte, the hole tip of disk seat be equipped with the corresponding butt groove of stopper head, the calotte tip butt of stopper head on the butt groove, the periphery wall inlay card of base on the inner wall of oil outlet pipeline be equipped with through the groove on the one-way valve core.

2. A fuel flow-obstructing structure of a fuel pump according to claim 1, characterized in that: an annular retaining ring is arranged on the base, the valve rod penetrates through the retaining ring, and the through groove is arranged on the retaining ring and penetrates through the base.

3. A fuel flow-obstructing structure of a fuel pump according to claim 1, characterized in that: the inner wall of the oil outlet pipeline is provided with an annular clamping groove, and the outer peripheral wall of the base is clamped in the clamping groove.