CN219262978U

CN219262978U - Fuel pump floating shaft sleeve assembly

Info

Publication number: CN219262978U
Application number: CN202320273603.3U
Authority: CN
Inventors: 高风; 高珂
Original assignee: Xinxiang Hangxing Hydraulic Power Co ltd
Current assignee: Xinxiang Hangxing Hydraulic Power Co ltd
Priority date: 2023-02-21
Filing date: 2023-02-21
Publication date: 2023-06-27
Anticipated expiration: 2033-02-21

Abstract

The utility model discloses a floating shaft sleeve assembly of a fuel pump, and relates to the technical field of fuel oil transportation. The utility model comprises a shell, a pump shaft, a mounting disc, a sealing shell and a fixing shell, wherein rubber backing rings are fixed at the centers of the top and the bottom of the inner wall of the shell, the pump shaft is movably connected in the shell, the mounting disc is fixed at the upper part of the peripheral side of the shell, the sealing shell is fixedly communicated with the center of the bottom of the shell, and the fixing shell is fixedly communicated with the bottom of the shell outside the sealing shell in an annular array. The utility model solves the problems that the sealing effect is easy to be reduced due to abrasion of friction factors and the deformation is easy to be generated due to impact when the floating shaft sleeve component of the fuel pump is matched for a long time by arranging the shell, the pump shaft, the mounting disc, the sealing shell and the fixing shell, and has the advantages that: the floating shaft sleeve component is matched for a long time, so that the sealing effect is not reduced, and deformation caused by impact generated during the operation of the fuel pump can be better prevented.

Description

Fuel pump floating shaft sleeve assembly

Technical Field

The utility model belongs to the technical field of fuel oil transportation, and particularly relates to a floating shaft sleeve assembly of a fuel pump.

Background

The fuel pump is a technical term of auto parts industry, is one of basic components of an electronic injection automobile fuel injection system, is positioned in an automobile fuel tank, works when the fuel pump is started and an engine is operated, if the engine is stopped and an ignition switch is still ON, the HFM-SFI control module turns off a power supply of the fuel pump so as to avoid accidental ignition, the fuel pump is used for sucking fuel from the fuel tank and pressurizing and then conveying the fuel into a fuel supply pipe, and is matched with a fuel pressure regulator to establish certain fuel pressure, in the working process, in order to ensure sealing, a floating shaft sleeve (sliding bearing) group gauge is needed to ensure sealing effect, but the following defects still exist in practical use:

in the working process of the floating shaft sleeve assembly of the fuel pump, the sealing is directly generated by extruding the circumference of the pump shaft through the shaft sleeve assembly, and in the sealing process, the pump shaft is easy to cause the reduction of the sealing effect and the mechanical failure under the long-time fine movement;

in the working process of the floating shaft sleeve component of the fuel pump, when the impact generated by the fuel pump is led to the floating shaft sleeve component, the connecting position is easy to impact, and after a long-time working period, the sealing shaft sleeve is easy to deform.

Disclosure of Invention

The utility model aims to provide a floating shaft sleeve assembly of a fuel pump, which solves the problems that the sealing effect is easy to be reduced due to abrasion of friction factors and deformation is easy to be generated due to impact when the floating shaft sleeve assembly of the fuel pump is matched for a long time by arranging a shell, a pump shaft, a mounting disc, a sealing shell and a fixing shell.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

the utility model relates to a floating shaft sleeve assembly of a fuel pump, which comprises a shell, a pump shaft, a mounting disc, a sealing shell and a fixing shell, wherein rubber backing rings are fixed at the centers of the top and the bottom of the inner wall of the shell, the pump shaft is movably connected in the shell, the mounting disc is fixed at the upper part of the peripheral side of the shell, the sealing shell is fixedly communicated with the center of the bottom of the shell, the fixing shell is fixedly communicated with the bottom of the shell outside the sealing shell in an annular array, the pump shaft, the mounting disc, the sealing shell and the fixing shell are connected together through the shell during operation, the pump shaft is movably connected in the shell, the upper part of the pump shaft is sealed through the backing ring in the shell in a rotating process, the mounting bolts on the mounting disc are screwed into corresponding mounting positions in the fuel pump, the shell is arranged at corresponding positions in the fuel pump, gaps between the bottom of the shell and the pump shaft are sealed through the sealing shell, and the liquid flow generated by impact in the shell is carried out through the fixing shell, so that the impact energy is absorbed, and the impact on the shell is reduced during operation.

Further, the center of the top of the shell is provided with a through hole in a penetrating way, the rubber pad ring in the shell is fixed on the outer side of the through hole on the inner wall of the shell, and the shell is movably connected with the pump shaft through the through hole when in work.

Further, two outer discs are fixed on the periphery of the pump shaft, the outer discs are arranged in the shell, and the pump shaft is limited in the shell through the outer discs.

Further, a fixed port is formed in the center of one end face of the mounting plate, the shell is fixed in the fixed port, mounting bolts are movably connected in the mounting plate outside the fixed port in a penetrating mode in an annular array mode, connecting springs are fixed at the top of the mounting plate outside the mounting bolts, the mounting plate is fixed on the shell through the fixed port in operation, and the mounting plate is mounted in the fuel pump through the mounting bolts.

Further, the movable hole is correspondingly formed in the top of the sealing shell and the through hole, an inflatable cushion is fixed in the sealing shell, the pump shaft is movably connected in the movable hole and is movably connected in the inflatable cushion, and when the sealing shell works, the sealing shell is movably connected with the pump shaft through the inflatable cushion, and a gap between the pump shaft and the shell is sealed through extrusion of the inflatable cushion.

Further, an inner pressure spring is fixed at the bottom in the fixed shell, a buffer piston is fixed at the top end of the inner pressure spring, the buffer piston is movably connected to the inner upper portion of the fixed shell, when the fixed shell works, the inner pressure spring is matched with the buffer piston to carry out bearing on liquid flowing into the fixed shell, the flow of liquid impact is absorbed, and the smoothness of the shell in the working process is improved.

The utility model has the following beneficial effects:

according to the utility model, the problem that the sealing effect is reduced due to abrasion of friction factors when the floating shaft sleeve component of the fuel pump is matched for a long time is solved by arranging the shell, the pump shaft, the mounting disc and the mounting disc, and the sealing disc are contacted with the rubber backing ring at the inner top of the shell, so that the inner upper part of the shell is sealed with the pump shaft, and the air cushion in the sealing shell seals a gap between the inner lower part of the shell and the pump shaft, so that the sealing effect is not reduced due to friction factors when the floating shaft sleeve component is matched for a long time during working.

According to the utility model, the problem that the floating shaft sleeve assembly of the fuel pump is easy to deform due to impact is solved by arranging the shell and the fixed shell, the vibration generated by the pump shaft and perpendicular to the axial direction of the floating shaft sleeve assembly is increased through the connecting spring, the impact is reduced, when the whole fuel pump generates the axial impact of the pump shaft, the liquid in the shell is impacted into the fixed shell, the buffer piston is pressed, the internal pressure spring is pressed down, the impact force of the liquid is slowed down when the internal pressure spring is pressed down, the stability of the shell under the impact is increased, and the deformation of the shell caused by the impact is better prevented.

Drawings

FIG. 1 is a perspective view of an assembled structure of a floating collar assembly of a fuel pump;

FIG. 2 is a perspective view of a cross-sectional structure of the housing;

FIG. 3 is a perspective view of a pump shaft structure;

FIG. 4 is a perspective view of the mounting plate structure;

FIG. 5 is a cross-sectional perspective view of the seal housing;

fig. 6 is a sectional perspective view of the fixing case.

Reference numerals:

100. a housing; 101. a through hole; 102. a rubber grommet; 200. a pump shaft; 201. an outer disk; 300. a mounting plate; 301. a fixed port; 302. installing a bolt; 303. a connecting spring; 400. a sealed housing; 401. a movable hole; 402. an inflatable cushion; 500. a fixed case; 501. a buffer piston; 502. an internal compression spring.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

Referring to fig. 1 to 6, the present utility model is a floating bushing assembly for a fuel pump, which comprises a housing 100, a pump shaft 200, a mounting plate 300, a sealing case 400 and a fixing case 500, wherein rubber backing rings 102 are fixed at the top and bottom centers of the inner wall of the housing 100, a certain amount of liquid is contained in the housing 100 for buffering, the impact of the outer plate 201 on the housing is relieved by the rubber backing rings 102, the pump shaft 200 is movably connected in the housing 100, the pump shaft 200 is used for transmitting the power generated in the fuel pump, the mounting plate 300 is fixed at the upper part of the peripheral side of the housing 100, the mounting plate 300 provides the mounting function between the housing 100 and the fuel pump, the sealing case 400 is fixedly connected at the bottom center of the housing 100, the sealing case 400 seals the connecting position of the bottom of the housing 100 and the pump shaft 200 during operation, the housing 100 at the outer side of the sealing case 400 is fixedly connected with the fixing case 500 in an annular array, and the fixing case 500 is used for containing the liquid flowing due to the impact in the housing 100.

As shown in fig. 1 and 2, a through hole 101 is formed in the center of the top of the housing 100, a rubber grommet 102 in the housing 100 is fixed to the outside of the through hole 101 on the inner wall of the housing 100, and the housing 100 is movably connected to the pump shaft 200 through the through hole 101.

As shown in fig. 1 and 3, two outer discs 201 are fixed on the circumferential side of the pump shaft 200, the outer discs 201 are arranged in the housing 100, and the pump shaft 200 limits the movable range of the pump shaft in the housing 100 through the two outer discs 201.

As shown in fig. 1 and 4, a fixing opening 301 is formed in the center of one end face of the mounting disc 300, the housing 100 is fixed in the fixing opening 301, the mounting disc 300 is fixed with the housing 100 through the fixing opening 301, the mounting disc 300 outside the fixing opening 301 is in annular array through and movably connected with a mounting bolt 302, after the mounting disc 300 is inserted into the mounting disc 302 through the mounting bolt 302, the mounting disc is screwed into a mounting position in a corresponding fuel pump and screwed to a certain degree, the position between the mounting disc 300 and the fuel pump is limited, a connecting spring 303 is fixed at the top of the mounting disc 300 outside the mounting bolt 302, and the connecting spring 303 ensures that the mounting disc 300 and the fuel pump cannot loosen when working.

As shown in fig. 1 and 5, a movable hole 401 is formed at the top of the seal housing 400 corresponding to the position of the through hole 101, an inflatable cushion 402 is fixed in the seal housing 400, and the pump shaft 200 is movably connected in the movable hole 401 and is movably connected in the inflatable cushion 402, so that when in operation, the inflatable cushion 402 can tightly seal the pump shaft 200 with the mounting disc 300 in the seal housing 400.

As shown in fig. 1 and 6, an internal compression spring 502 is fixed at the bottom of the fixed shell 500, a buffer piston 501 is fixed at the top of the internal compression spring 502, the buffer piston 501 is movably connected at the upper inner portion of the fixed shell 500, when the shell 100 is impacted during operation, liquid therein moves downwards into the fixed shell 500, the buffer piston 501 is pressed, so that the internal compression spring 502 is pressed down, when the internal compression spring 502 is pressed down, the impact force of the liquid is slowed down, and the stability of the shell 100 under impact is increased.

The specific working principle of the utility model is as follows: during operation, the whole housing 100 is rotated firstly, so that the mounting bolts 302 on the mounting disc 300 correspond to the corresponding mounting positions in the fuel pump, the mounting bolts 302 are screwed into the corresponding mounting positions in the fuel pump and rotate to corresponding tightness, corresponding mounting is completed, the rubber backing ring 102 at the inner top of the housing 100 is contacted with the outer disc 201 at the upper part of the periphery of the pump shaft 200, the inner upper part of the housing 100 is sealed with the pump shaft 200, a gap between the inner lower part of the housing 100 and the pump shaft 200 is sealed through the air cushion 402 in the sealing shell 400, the mounting is completed, vibration, which is generated by the pump shaft 200 and perpendicular to the axial direction, is increased through the connecting spring 303, the vibration is reduced, when the axial impact of the pump shaft 200 is generated, the liquid in the housing 100 is impacted into the fixed shell 500, the buffer piston 501 is pressed, when the inner pressure spring 502 is pressed down, the impact force of the liquid is slowed down, and the stability of the housing 100 is increased.

The foregoing is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, and any modification, equivalent replacement, and improvement of some of the technical features described in the foregoing embodiments are all within the scope of the present utility model.

Claims

1. The utility model provides a floating shaft sleeve subassembly of fuel pump, includes casing (100), pump shaft (200), mounting disc (300), seal shell (400) and fixed shell (500), its characterized in that: the novel sealing device is characterized in that rubber backing rings (102) are fixed at the top and bottom centers of the inner wall of the shell (100), a pump shaft (200) is movably connected in the shell (100), a mounting disc (300) is fixed on the upper portion of the periphery of the shell (100), a sealing shell (400) is fixedly communicated with the bottom center of the shell (100), and a fixing shell (500) is fixedly communicated with the bottom of the shell (100) outside the sealing shell (400) in an annular array.

2. The fuel pump floating collar assembly of claim 1 wherein: a through hole (101) is formed in the center of the top of the shell (100) in a penetrating manner, and a rubber backing ring (102) in the shell (100) is fixed on the outer side of the through hole (101) on the inner wall of the shell (100).

3. The fuel pump floating collar assembly of claim 1 wherein: two outer discs (201) are fixed on the periphery of the pump shaft (200), and the outer discs (201) are arranged in the shell (100).

4. The fuel pump floating collar assembly of claim 1 wherein: a fixing opening (301) is formed in the center of one end face of the mounting plate (300), the shell (100) is fixed in the fixing opening (301), mounting bolts (302) are movably connected in an annular array penetrating mode in the mounting plate (300) on the outer side of the fixing opening (301), and connecting springs (303) are fixed at the tops of the mounting plates (300) on the outer side of the mounting bolts (302).

5. The fuel pump floating collar assembly of claim 2 wherein: the top of the sealing shell (400) is provided with a movable hole (401) corresponding to the through hole (101), an inflatable cushion (402) is fixed in the sealing shell (400), and the pump shaft (200) is movably connected in the movable hole (401) and is movably connected in the inflatable cushion (402).

6. The fuel pump floating collar assembly of claim 1 wherein: an inner compression spring (502) is fixed at the inner bottom of the fixed shell (500), a buffer piston (501) is fixed at the top end of the inner compression spring (502), and the buffer piston (501) is movably connected to the inner upper portion of the fixed shell (500).