CN218816708U

CN218816708U - Fuel injection pump structure for improving oil pressure and controlling fuel injection time

Info

Publication number: CN218816708U
Application number: CN202222857756.0U
Authority: CN
Inventors: 王芳; 蔡惠军; 方云佳
Original assignee: Wuxi Toefl Precision Machinery Co ltd
Current assignee: Wuxi Toefl Precision Machinery Co ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-04-07
Anticipated expiration: 2032-10-28

Abstract

The utility model discloses an improve oil pressure and control fuel injection time's injection pump structure relates to injection pump technical field, which comprises a pump body, the top and the inside of the pump body are provided with install bin, play oil channel, oil feed way, first runner, second runner and cavity respectively, it is provided with out oil check valve, oil feed check valve and piston to slide respectively in first runner, oil feed way and the cavity, set up forcing mechanism in the install bin, forcing mechanism includes slide bar, balladeur train, pivot, motor and transmission shaft, the both ends of slide bar respectively with piston and balladeur train fixed connection, the pivot sets up and has fixed the cup joint on it in the install bin and has the carousel, the motor sets up the rear side at the install bin and is connected with the pivot transmission, the transmission shaft sets up the front side at the carousel and is connected with the balladeur train. The utility model discloses in, solved current injection pump and because of the camshaft motion stroke is shorter, leaded to the less not enough problem of oil feed to appear easily of pump internal oil pressure.

Description

Fuel injection pump structure for improving oil pressure and controlling fuel injection time

Technical Field

The utility model relates to an injection pump technical field especially relates to an improve oil pressure and control fuel injection time's injection pump structure.

Background

The injection pump is an important component of an automotive diesel engine. The fuel injection pump assembly is usually an integral body formed by mounting components such as a fuel injection pump, a speed regulator and the like together. The governor is a component which ensures the low-speed operation of the diesel engine and the limitation of the maximum rotating speed and ensures a certain relation between the injection quantity and the rotating speed.

Current injection pump when engine drive injection pump, uses the camshaft rotation to promote the plunger pump to produce the oil pressure mostly, but because the camshaft motion stroke is shorter, so the oil pressure is less for appear the not enough problem of fuel feeding after using for a long time easily, thereby influence the use of engine, the practicality is relatively poor, is unfavorable for using widely.

To this end, a fuel injection pump structure for increasing oil pressure and controlling fuel injection time is designed to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model provides an improve oil pressure and control fuel injection time's injection pump structure has solved current injection pump and has leaded to the less not enough problem of fuel feeding to appear easily of pump interior oil pressure because of the camshaft motion stroke is shorter.

For solving the technical problem, the utility model provides a pair of improve oil pressure and control fuel injection time's injection pump structure, the pump comprises a pump body, the top of the pump body is provided with the install bin, be provided with oil outlet, oil feed way, first runner, second runner and cavity in the pump body, just oil outlet, oil feed way, first runner, second runner and cavity are linked together, it is provided with out oil check valve and oil feed check valve to slide respectively in first runner and the oil feed way, it is provided with the piston to slide in the cavity, set up the loading system in the install bin, loading system is used for improving the internal oil pressure of pump, loading system includes slide bar, balladeur train, pivot, carousel, motor and transmission shaft, the both ends of slide bar respectively with piston and balladeur train fixed connection, seted up the fixed orifices in the balladeur train, the pivot sets up in the install bin, the carousel is fixed cup joints in the pivot, the motor sets up the rear side at the install bin, just the drive shaft of motor is connected with the one end transmission of pivot, the transmission shaft sets up the front side at the transmission shaft of carousel, just the other end of transmission shaft slides in the fixed orifices, can make the transmission shaft promote the cavity through opening the motor, can make the internal movement of camshaft, and the oil injection pump, thereby the control piston and the oil injection pump that the time appears less, and the oil injection pump is less, thereby the oil injection pump is less, the control is less, and has been realized the control in the control of the oil injection pump that the control.

Preferably, the inside of install bin is provided with the installation cavity, balladeur train sliding connection is in the installation cavity, the pivot is rotated and is connected in the installation cavity.

Preferably, the sliding rod is sleeved with a first spring, and two ends of the first spring are respectively fixedly connected with the sliding frame and the inner wall of the installation cavity.

Preferably, the top of oil outlet check valve and oil inlet check valve all is provided with the second spring.

Preferably, the top of oil outlet check valve and oil inlet check valve all is provided with the piston rod, two the piston rod respectively with first runner and oil inlet way inner wall connection, and one of them the piston rod leaves the clearance with first runner, can prevent that oil outlet check valve and oil inlet check valve from taking place the skew when kick-backing.

Preferably, the second spring is made of 304 stainless steel, and the outer surface of the second spring is wrapped with a waterproof film, so that the corrosion rate of the second spring can be effectively delayed, and the service life of the second spring can be prolonged.

Preferably, a sealing ring is arranged at the joint of the pump body and the sliding rod and is sleeved on the sliding rod, and the sealing performance between the pump body and the installation box can be improved by arranging the sealing ring, so that fuel oil is prevented from permeating into the installation cavity.

Compared with the prior art, the utility model provides a pair of improve oil pressure and control fuel injection time's injection pump structure has following beneficial effect:

1. the utility model discloses in, through opening the motor, can make the transmission shaft promote the piston and remove in the cavity, compare in traditional camshaft drive piston, this injection pump can make the piston slide longer distance to play the effect that improves the oil pressure, through the opening time of control motor, can control the oil spout time, solved current injection pump because of the camshaft motion stroke is shorter, lead to the less problem that the oil supply is not enough appearing easily of pump internal oil pressure.

2. The utility model discloses in, through setting up second spring and piston rod, can make the check valve that produces oil and oil feed check valve normal motion in first runner and oil feed way, prevent the skew to make the normal oil spout of this injection pump, through setting up the sealing washer, can improve the leakproofness between the pump body and the install bin.

Drawings

FIG. 1 is a schematic plan view of the interior of an injection pump configuration for increasing oil pressure and controlling injection timing;

FIG. 2 is a schematic perspective view of the exterior of a fuel injection pump configuration for increasing oil pressure and controlling fuel injection time;

fig. 3 is an enlarged view of a point a in fig. 1.

Reference numbers in the figures: 1. a pump body; 2. installing a box; 3. an oil outlet channel; 4. an oil inlet channel; 5. a first flow passage; 6. a second flow passage; 7. a piston; 8. a slide bar; 9. a carriage; 10. a first spring; 11. a rotating shaft; 12. a turntable; 13. a motor; 14. a drive shaft; 15. an oil outlet check valve; 16. an oil inlet check valve; 17. a second spring; 18. a piston rod.

Detailed Description

Embodiments of the present invention are described in detail below.

Example one

The structure of the fuel injection pump for improving oil pressure and controlling fuel injection time is shown in figures 1-3 and comprises a pump body 1, a mounting box 2 is arranged at the top of the pump body 1, a fuel outlet channel 3, a fuel inlet channel 4, a first flow channel 5, a second flow channel 6 and a cavity are arranged in the pump body 1, the fuel outlet channel 3, the fuel inlet channel 4, the first flow channel 5 and the second flow channel 6 are communicated with the cavity, a fuel outlet check valve 15 and a fuel inlet check valve 16 are respectively arranged in the first flow channel 5 and the fuel inlet channel 4 in a sliding manner, a piston 7 is arranged in the cavity in a sliding manner, a pressurizing mechanism is arranged in the mounting box 2 and used for improving the oil pressure in the pump body 1 and comprises a sliding rod 8, a sliding frame 9, a rotating shaft 11, a rotating disc 12, a motor 13 and a transmission shaft 14, two ends of the sliding rod 8 are respectively and fixedly connected with the piston 7 and the sliding frame 9, a fixed hole is formed in the sliding frame 9, the rotating shaft 11 is arranged in the mounting box 2, the rotating shaft 12 is arranged at the rear side of the motor 13, the rotating shaft is arranged at the rear side of the mounting box 2, a driving shaft 14 is connected with one end of the sliding rod 11, a spring 10 is arranged in the sliding shaft fixed hole in the sliding chamber 14, and a first spring 10 is arranged in the sliding shaft 10 and connected with the sliding frame 9, and a sliding spring arranged in the sliding manner in the mounting box, and a sliding shaft 10.

When an engine drives an oil injection pump, a motor 13 is started, a rotating shaft 11 drives a rotating disc 12 to rotate, a transmission shaft 14 slides in a fixed hole and pushes a sliding rod 8 and a piston 7 to move at the bottom end of a cavity, fuel enters the other side of the piston 7 from one side of the piston 7 through an oil outlet check valve 15, the piston 7 moves upwards in the cavity according to the principle, the fuel enters the rear side of the piston 7 from an oil tank through an oil inlet check valve 16, the fuel at the front side of the piston 7 is discharged from a fuel delivery pump to enter a fuel injection system, the oil pressure in the oil injection pump can be improved due to the fact that the pressurizing mechanism is larger in movement range compared with a traditional camshaft, the oil injection time of the oil injection pump can be accurately controlled by controlling the starting time of the motor 13, and the problem that the oil supply is insufficient due to the fact that the oil pressure in the pump is small due to the fact that the movement stroke of the camshaft is short in the existing oil injection pump is solved.

A sealing ring is arranged at the joint of the pump body 1 and the sliding rod 8, and the sealing ring is sleeved on the sliding rod 8. Through setting up the sealing washer, can improve the leakproofness between the pump body 1 and the install bin 2, prevent that the fuel from permeating the installation intracavity.

For the sealing ring, the sealing ring is made of rubber, and the rubber has certain elasticity so as to be tightly attached to the joint of the sliding rod 8 and the pump body 1, so that the sealing property is improved.

Example two

As shown in fig. 1, on the basis of the first embodiment, the second springs 17 are disposed at the tops of the oil outlet check valve 15 and the oil inlet check valve 16, the piston rods 18 are disposed at the tops of the oil outlet check valve 15 and the oil inlet check valve 16, the two piston rods 18 are respectively connected with the inner walls of the first flow passage 5 and the oil inlet passage 4, and a gap is left between one of the piston rods 18 and the first flow passage 5.

By providing the second spring 17 and the piston rod 18, the oil outlet check valve 15 and the oil inlet check valve 16 can be moved normally in the first flow passage 5 and the oil inlet passage 4 to prevent displacement, thereby enabling the fuel injection pump to inject fuel normally.

The material of the second spring 17 is 304 stainless steel, and the outer surface of the second spring 17 is wrapped with a waterproof film. The corrosion rate of the second spring 17 can be effectively delayed, thereby being beneficial to prolonging the service life of the second spring 17.

The working principle is as follows:

when the oil injection pump is used, when an engine drives an oil injection pump, the motor 13 is started, the rotating shaft 11 drives the rotating disc 12 to rotate, the transmission shaft 14 slides in the fixed hole and pushes the sliding rod 8 and the piston 7 to move at the bottom end of the cavity, fuel enters the other side of the piston 7 from one side of the piston 7 through the oil outlet check valve 15, the piston 7 moves upwards in the cavity according to the principle, the fuel enters the rear side of the piston 7 from the oil tank through the oil inlet check valve 16, and the fuel at the front side of the piston 7 is discharged from the fuel delivery pump and enters a fuel injection system.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The fuel injection pump structure comprises a pump body (1) and is characterized in that the top and the inside of the pump body (1) are respectively provided with an installation box (2), an oil outlet channel (3), an oil inlet channel (4), a first flow channel (5), a second flow channel (6) and a cavity, the first flow channel (5), the oil inlet channel (4) and the cavity are respectively provided with an oil outlet check valve (15), an oil inlet check valve (16) and a piston (7) in a sliding manner, and a pressurizing mechanism is arranged in the installation box (2);

pressurizing mechanism includes slide bar (8), balladeur train (9), pivot (11), motor (13) and transmission shaft (14), the both ends of slide bar (8) respectively with piston (7) and balladeur train (9) fixed connection, pivot (11) set up in install bin (2) and fixed the cup joint carousel (12) on it, motor (13) set up the rear side in install bin (2) and be connected with pivot (11) transmission, transmission shaft (14) set up in the front side of carousel (12) and be connected with balladeur train (9).

2. The structure of the fuel injection pump for improving oil pressure and controlling fuel injection time of claim 1, wherein the installation box (2) is internally provided with an installation cavity, the carriage (9) is slidably connected in the installation cavity, the rotating shaft (11) is rotatably connected in the installation cavity, the carriage (9) is internally provided with a fixed hole, and one end of the transmission shaft (14) is slidably inserted in the fixed hole.

3. The structure of the fuel injection pump for increasing the oil pressure and controlling the fuel injection time as claimed in claim 2, characterized in that the sliding rod (8) is sleeved with a first spring (10), and two ends of the first spring (10) are respectively connected with the sliding frame (9) and the inner wall of the mounting cavity.

4. The structure of the fuel injection pump for increasing the oil pressure and controlling the injection time of the fuel according to claim 1, characterized in that the second spring (17) is arranged on the top of each of the outlet check valve (15) and the inlet check valve (16).

5. The structure of the fuel injection pump for improving the oil pressure and controlling the fuel injection time of claim 1, wherein the top of the fuel outlet check valve (15) and the top of the fuel inlet check valve (16) are both provided with piston rods (18), and the two piston rods (18) are respectively connected with the inner walls of the first flow passage (5) and the fuel inlet passage (4).

6. The structure of the fuel injection pump for improving oil pressure and controlling fuel injection time of claim 1, characterized in that a sealing ring is arranged at the joint of the pump body (1) and the sliding rod (8), and the sealing ring is sleeved on the sliding rod (8).