CN211448927U

CN211448927U - Shaftless internal combustion hydraulic oil pump and excavator with same

Info

Publication number: CN211448927U
Application number: CN201922298676.4U
Authority: CN
Inventors: 张健; 侯宇; 李山柏
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-09-08
Anticipated expiration: 2029-12-19

Abstract

The utility model discloses a shaftless internal combustion hydraulic oil pump, include: the hydraulic pump cylinder and the four-stroke internal combustion engine are connected with the combustion engine piston of the internal combustion engine and the hydraulic piston in the hydraulic pump cylinder synchronously through a first connecting rod in the axial direction; the internal combustion engine is connected with an air inlet system for introducing air into the internal combustion engine, the hydraulic pump cylinder is connected with the oil storage barrel, and when the air inlet system introduces air into the internal combustion engine, oil in the hydraulic pump cylinder is discharged into the oil storage barrel; the hydraulic pump cylinder is connected with a hydraulic system which is used for inputting oil pressure into the hydraulic pump cylinder to push a piston of the combustion engine to compress or discharge gas in the combustion engine; the hydraulic system and the air inlet system are both connected with the power system. The utility model discloses a hydraulic piston of hydraulic pump jar and the combustion engine piston of internal-combustion engine are connected to first connecting rod, make hydraulic piston and combustion engine piston can synchronous motion when the transmission, do not have other mechanical transmission between the two to energy loss between combustion engine piston to the hydraulic piston has been reduced. The utility model also discloses an energy-conserving excavator.

Description

Shaftless internal combustion hydraulic oil pump and excavator with same

Technical Field

The utility model relates to the technical field, more specifically say, relate to a shaftless internal combustion hydraulic oil pump. Furthermore, the utility model discloses still relate to an excavator including above-mentioned shaftless internal combustion hydraulic oil pump.

Background

The existing field engineering machinery (such as an excavator) completely adopts a mode of finishing work by using a hydraulic pump link driven by the output power of an internal combustion engine. The system is divided into two independent working units of an internal combustion engine and a hydraulic pump, mechanical energy output by diesel oil detonation is converted into hydraulic energy through a series of linkage transmission (diesel oil-piston-crankshaft rotation-speed reducer-hydraulic pump crankshaft rotation-oil cylinder piston) in linkage, and great mechanical energy loss is caused.

In summary, how to reduce the loss of energy transmitted between the internal combustion engine and the hydraulic pump is a problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a shaftless internal combustion hydraulic oil pump, which can reduce the energy loss between the internal combustion engine and the hydraulic pump by using the shaftless internal combustion engine hydraulic oil pump cylinder to drive the engineering machinery.

Another object of the utility model is to provide an excavator including above-mentioned shaftless internal combustion hydraulic oil pump.

In order to achieve the above object, the present invention provides the following technical solutions:

a shaftless internal combustion hydraulic oil pump comprising: the hydraulic control system comprises a hydraulic pump cylinder and a four-stroke internal combustion engine, wherein a combustion engine piston of the internal combustion engine is synchronously connected with a hydraulic piston in the hydraulic pump cylinder through a first connecting rod in the axial direction;

the internal combustion engine is connected with an air inlet system for introducing air into the internal combustion engine, the hydraulic pump cylinder is connected with an oil storage barrel, and when the air inlet system introduces air into the internal combustion engine, oil in the hydraulic pump cylinder is discharged into the oil storage barrel;

the hydraulic pump cylinder is connected with a hydraulic system which is used for inputting oil pressure into the hydraulic pump cylinder to push the combustion engine piston to compress or discharge gas in the combustion engine;

the hydraulic pump cylinder is connected with a working oil way, and the mechanical energy output by the internal combustion engine is used for driving the hydraulic piston to discharge oil in the hydraulic pump cylinder into the working oil way to output power;

the hydraulic system and the air inlet system are both connected with a power system.

Preferably, the internal combustion engine includes: the two ends of the two combustion engine cylinder bodies are respectively provided with an inlet valve and an exhaust valve, the two combustion engine cylinder bodies are respectively provided with an oil nozzle for injecting oil into the two combustion engine cylinder bodies, and each combustion engine cylinder body is internally provided with a movable combustion engine piston; two movable hydraulic pistons are symmetrically arranged in the hydraulic pump cylinder, one hydraulic piston is axially connected with one combustion engine piston through one first connecting rod, and the other hydraulic piston is axially connected with the other combustion engine piston through the other first connecting rod.

Preferably, the two combustion engine cylinder bodies are communicated with the hydraulic pump cylinder, limiting parts for limiting the stroke of the combustion engine piston are arranged in the two combustion engine cylinder bodies, and the hydraulic pump cylinder between the combustion engine piston and the hydraulic piston on the same side is connected to a cooling system.

Preferably, both exhaust valves are connected to an exhaust gas direct current generator.

Preferably, the power system comprises a high-pressure energy storage cabinet connected with the air intake system and the hydraulic system respectively, the high-pressure energy storage cabinet is communicated with an auxiliary gas cylinder, and the auxiliary gas cylinder is used for charging pressure into the high-pressure energy storage cabinet to control the air intake system to intake air to the internal combustion engine and control the hydraulic system to input low-pressure oil into the hydraulic pump cylinder.

Preferably, the hydraulic system comprises: the first oil cylinder and the second oil cylinder are symmetrically arranged, a first driving oil cylinder is arranged between the first oil cylinder and the second oil cylinder, a movable first oil cylinder piston is arranged in the first oil cylinder, a movable second oil cylinder piston is arranged in the second oil cylinder, a movable first driving piston is arranged in the first driving oil cylinder, and the first oil cylinder piston and the second oil cylinder piston are axially connected with the first driving piston through a second connecting rod;

a first oil inlet and a first oil outlet are formed in each of two ends of the first oil cylinder, a second oil inlet and a second oil outlet are formed in each of two ends of the second oil cylinder, first oil ports are formed in each of two ends of the first driving oil cylinder, and first check valves are arranged in each of the first oil inlet and the second oil ports;

the first oil inlet and the second oil inlet are both connected with an oil storage barrel, and the first oil outlet and the second oil outlet are both connected with the hydraulic pump cylinder; the first oil ports are connected with the high-voltage energy storage cabinet through first electromagnetic directional valves;

when oil is fed into one end of the first driving oil cylinder and oil is discharged from the other end of the first driving oil cylinder, the first driving piston, the first oil cylinder piston and the second oil cylinder piston all move towards the same side, the first oil cylinder piston feeds oil into the first oil inlet at the rear end part of the first oil cylinder piston in the moving direction, and the first oil outlet at the front end of the first oil cylinder piston conveys low-pressure oil into the hydraulic pump cylinder; and the second oil cylinder piston feeds oil into the second oil inlet at the end part of the rear end of the second oil cylinder piston in the moving direction of the second oil cylinder piston, and the second oil outlet at the front end of the second oil cylinder piston conveys low-pressure oil into the hydraulic pump cylinder.

Preferably, the air intake system includes: the first cylinder and the second cylinder are symmetrically arranged, a second driving oil cylinder is arranged between the first cylinder and the second cylinder, a movable first cylinder piston is arranged in the first cylinder, a movable second cylinder piston is arranged in the second cylinder, a movable second driving piston is arranged in the second driving oil cylinder, and the first cylinder piston and the second cylinder piston are both axially connected with the second driving piston through a third connecting rod;

a first air inlet and a first air outlet are formed in each of two ends of the first air cylinder, a second air inlet and a second air outlet are formed in each of two ends of the second air cylinder, a second oil port is formed in each of two ends of the second driving oil cylinder, and a second one-way valve is arranged in each of the first air inlet and the second air inlet;

the first air inlet and the second air inlet are both connected with an air filter, and the first air outlet and the second air outlet are both connected with the air inlet of the combustion engine; the second oil ports are connected with the high-voltage energy storage cabinet through second electromagnetic directional valves;

when oil is fed into one end of the second driving oil cylinder and oil is discharged from the other end of the second driving oil cylinder, the second driving piston, the first cylinder piston and the second cylinder piston all move towards the same side, the first cylinder piston enters air towards the first air inlet at the end part of the rear end of the first driving oil cylinder in the moving direction of the first cylinder piston, and enters air towards the air inlet of the gas turbine from the first air outlet at the front end of the first driving oil cylinder; the second cylinder piston conveys gas towards the second gas inlet at the end part of the rear end of the second cylinder piston in the moving direction of the second cylinder piston, and conveys gas towards the gas inlet of the combustion engine from the second gas outlet at the front end of the second cylinder piston.

Preferably, a second electromagnetic switch valve is arranged on a pipeline connecting the hydraulic pump cylinder and the oil storage barrel.

Preferably, the output oil way of the hydraulic pump cylinder is also connected to the high-pressure energy storage cabinet.

An excavator, comprising: the engine comprises a machine body and the shaftless internal combustion hydraulic oil pump arranged on the machine body.

The utility model provides a pair of shaftless internal combustion hydraulic oil pump, include: the hydraulic pump cylinder and the four-stroke internal combustion engine are connected with the combustion engine piston of the internal combustion engine and the hydraulic piston in the hydraulic pump cylinder synchronously through a first connecting rod in the axial direction;

the internal combustion engine is connected with an air inlet system for introducing air into the internal combustion engine, the hydraulic pump cylinder is connected with the oil storage barrel, and when the air inlet system introduces air into the internal combustion engine, oil in the hydraulic pump cylinder is discharged into the oil storage barrel;

the hydraulic pump cylinder is connected with a hydraulic system which is used for inputting oil pressure into the hydraulic pump cylinder to push a piston of the combustion engine to compress or discharge gas in the combustion engine;

the hydraulic pump cylinder is connected with the working oil way, and the mechanical energy output by the internal combustion engine is used for driving the hydraulic piston to discharge the oil in the hydraulic pump cylinder into the working oil way to output power;

the hydraulic system and the air inlet system are both connected with the power system.

When the engine is started, the power system inputs power into the hydraulic system, the hydraulic system conveys low-pressure oil into the hydraulic pump cylinder, the hydraulic piston is pushed to synchronously drive the engine piston to compress air in the internal combustion engine through the first connecting rod to form high-temperature and high-pressure air, the oil nozzle sprays fuel oil into the internal combustion engine, the energy is released after the fuel oil is deflagrated to push the engine piston to do work, and the hydraulic piston is synchronously driven to move through the first connecting rod to output high-pressure oil to the working oil way when the engine piston does work, so that power is output. Then the power system inputs power into the hydraulic system again, the hydraulic system feeds low-pressure oil into the hydraulic pump cylinder again to push the hydraulic piston to move so as to drive the piston of the combustion engine to synchronously move and discharge waste gas in the internal combustion engine, then the power system inputs power into the air inlet system, the air inlet system inputs air into the internal combustion engine, the air pressure in the internal combustion engine is increased to push the piston of the combustion engine to move so as to drive the hydraulic piston to move through the first connecting rod, so that the oil in the hydraulic pump cylinder is output into the oil storage barrel to be stored, and then the operation after the starting and the operation after the starting are repeated so as to continuously output the power into the working oil circuit.

The utility model discloses a hydraulic piston of hydraulic pump jar and the gas turbine piston of internal-combustion engine are connected to first connecting rod, make hydraulic piston and gas turbine piston can synchronous motion when the transmission, do not have other mechanical transmission between the two to reduced energy loss between gas turbine piston to the hydraulic piston, increased working oil way's output energy.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic view of a shaftless internal combustion hydraulic oil pump provided by the present invention;

FIG. 2 is a schematic diagram of a compression stroke of an internal combustion engine provided by the present invention;

fig. 3 is a schematic diagram of the power stroke of the internal combustion engine provided by the present invention;

FIG. 4 is a schematic diagram of an exhaust stroke of an internal combustion engine provided by the present invention;

FIG. 5 is a schematic diagram of an intake stroke of an internal combustion engine provided by the present invention;

fig. 6 is a schematic view of a cooling system provided by the present invention;

fig. 7 is a schematic diagram of a power system provided by the present invention;

fig. 8 is a schematic diagram of a hydraulic system provided by the present invention;

fig. 9 is a schematic view of an air intake system provided by the present invention;

fig. 10 is a schematic diagram of an internal combustion engine and a hydraulic pump cylinder provided by the present invention.

In FIGS. 1-10:

1-oil storage barrel, 2-high-pressure energy storage cabinet, 3-first electromagnetic switch valve, 4-auxiliary gas cylinder, 5-working oil way, 6-hydraulic system, 7-second electromagnetic directional valve, 8-air inlet system, 9-internal combustion engine, 10-tail gas DC generator, 11-radiator, 12-hydraulic pump cylinder, 13-second electromagnetic switch valve, 14-air filter, 15-oil filter, 16-first electromagnetic directional valve, 17-first oil cylinder, 18-first oil port, 19-second connecting rod, 20-second oil cylinder, 21-second oil inlet, 22-second oil outlet, 23-second oil cylinder piston, 24-first driving piston, 25-first driving oil cylinder, 26-first oil outlet, 27-a first oil inlet, 28-a first cylinder piston, 29-a first cylinder, 30-a second oil port, 31-a third connecting rod, 32-a second cylinder, 33-a second air inlet, 34-a second air outlet, 35-a second cylinder piston, 36-a second driving piston, 37-a second driving cylinder, 38-a first air outlet, 39-a first air inlet, 40-a first cylinder piston, 41-an oil outlet, 42-an oil inlet, 43-a first connecting rod, 44-an air inlet valve, 45-an oil nozzle, 46-an exhaust valve, 47-a limiting part, 48-a gas turbine piston and 49-a hydraulic piston.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The core of the utility model is to provide a shaftless internal combustion hydraulic oil pump, utilize this shaftless internal combustion engine hydraulic oil pump cylinder drive engineering machine tool can reduce the loss of energy transfer between internal-combustion engine and the hydraulic pump.

Referring to fig. 1 to 10, fig. 1 is a schematic view of a shaftless internal combustion hydraulic oil pump provided by the present invention; FIG. 2 is a schematic diagram of a compression stroke of an internal combustion engine provided by the present invention; fig. 3 is a schematic diagram of the power stroke of the internal combustion engine provided by the present invention; FIG. 4 is a schematic diagram of an exhaust stroke of an internal combustion engine provided by the present invention; FIG. 5 is a schematic diagram of an intake stroke of an internal combustion engine provided by the present invention; fig. 6 is a schematic view of a cooling system provided by the present invention; fig. 7 is a schematic diagram of a power system provided by the present invention; fig. 8 is a schematic diagram of a hydraulic system provided by the present invention; fig. 9 is a schematic view of an air intake system provided by the present invention; fig. 10 is a schematic diagram of an internal combustion engine and a hydraulic pump cylinder provided by the present invention.

A shaftless internal combustion hydraulic oil pump comprising: the hydraulic pump cylinder 12 and the four-stroke internal combustion engine 9, wherein an engine piston 48 of the internal combustion engine 9 is axially and synchronously connected with a hydraulic piston 49 in the hydraulic pump cylinder 12 through a first connecting rod 43; the internal combustion engine 9 is connected with an air inlet system 8 for introducing air into the internal combustion engine 9, the hydraulic pump cylinder 12 is connected with the oil storage barrel 1, and when the air inlet system 8 introduces air into the internal combustion engine 9, oil in the hydraulic pump cylinder 12 is discharged into the oil storage barrel 1; the hydraulic pump cylinder 12 is connected with a hydraulic system 6 for inputting oil pressure into the hydraulic pump cylinder 12 to push the internal combustion engine piston 48 to compress or discharge gas in the internal combustion engine 9; the hydraulic pump cylinder 12 is connected with the working oil path 5, mechanical energy output by the internal combustion engine 9 is used for driving the hydraulic piston 49 to discharge oil in the hydraulic pump cylinder 12 into the working oil path 5 to output power, and the hydraulic system 6 and the air inlet system 8 are both connected with the power system.

The four-stroke internal combustion engine 9 includes: and an air intake stroke, also called an air suction stroke, wherein the air intake system 8 is used for introducing air into the internal combustion engine 9 through the valve, the piston moves to enlarge an air intake space, and the valve is closed when the air intake is maximum. In the compression stroke, the hydraulic system 6 outputs low-pressure oil into the hydraulic pump cylinder 12 to push the engine piston 48 to compress air in the internal combustion engine 9, and when the air is compressed to the maximum stroke of the piston, the oil nozzle 45 sprays fuel into the internal combustion engine 9. In the power stroke, the fuel oil sprayed from the fuel spray nozzle 45 is mixed with the high-temperature and high-pressure air for deflagration, and the piston 48 of the combustion engine is pushed to do work. During the exhaust stroke, the valve of the internal combustion engine 9 is opened, and the hydraulic system 6 outputs low-pressure oil into the hydraulic pump cylinder 12 to push the engine piston 48 to exhaust air in the internal combustion engine 9.

The internal combustion engine 9 and the hydraulic pump cylinder 12 can be arranged side by side or at a certain angle, and the first connecting rod 43 can be a straight rod when arranged side by side, so that the first connecting rod 43, the combustion engine piston 48 and the hydraulic piston 49 are positioned on the same straight line, and the first connecting rod 43, the combustion engine piston 48 and the hydraulic piston 49 can synchronously reciprocate on the same straight line. When the first connecting rod 43 is arranged at a certain angle, the structure of the first connecting rod 43 can be set according to the actual situation, and at the moment, the first connecting rod 43, the combustion engine piston 48 and the hydraulic piston 49 are not in the same straight line, but the first connecting rod 43, the combustion engine piston 48 and the hydraulic piston 49 also move synchronously.

When the engine is started, the power system inputs power into the hydraulic system 6, the hydraulic system 6 conveys low-pressure oil into the hydraulic pump cylinder 12, the hydraulic piston 49 is pushed to synchronously drive the combustion engine piston 48 to compress air in the combustion engine 9 through the first connecting rod 43 to form high-temperature and high-pressure air, the oil nozzle 45 sprays fuel oil into the combustion engine 9, the fuel oil releases energy after detonation to push the combustion engine piston 48 to do work, the hydraulic piston 49 is synchronously driven to move through the first connecting rod 43 when the combustion engine piston 48 does work to output high-pressure oil to the working oil way 5, and therefore power is output. Then the power system inputs power into the hydraulic system 6 again, the hydraulic system 6 feeds low-pressure oil into the hydraulic pump cylinder 12 again to push the hydraulic piston 49 to move so as to drive the combustion engine piston 48 to move synchronously to discharge waste gas in the internal combustion engine 9, then the power system inputs power into the air intake system 8, the air intake system 8 inputs air into the internal combustion engine 9, the air pressure in the internal combustion engine 9 is increased to push the combustion engine piston 48 to move so as to drive the hydraulic piston 49 to move through the first connecting rod 43, so that the oil in the hydraulic pump cylinder 12 is output to the oil storage barrel 1 to be stored, and then the operation after the starting and the starting are repeated so as to continuously output power into the working oil path 5.

The utility model discloses a hydraulic piston 49 of hydraulic pump cylinder 12 and the combustion engine piston 48 of internal-combustion engine 9 are connected to first connecting rod 43, make hydraulic piston 49 and combustion engine piston 48 can synchronous motion when the transmission, do not have other mechanical transmission between the two to reduced combustion engine piston 48 to hydraulic piston 49 between energy loss, increased the output energy of working fluid circuit 5.

In addition to the above embodiment, as a further preferable aspect, the internal combustion engine 9 includes: the two ends of the two combustion engine cylinder bodies are respectively provided with an inlet valve 44 and an exhaust valve 46, the two combustion engine cylinder bodies are respectively provided with an oil nozzle 45 for injecting oil into the two combustion engine cylinder bodies, and each combustion engine cylinder body is internally provided with a movable combustion engine piston 48; two movable hydraulic pistons 49 are symmetrically arranged in the hydraulic pump cylinder 12, one hydraulic piston 49 is axially connected with one combustion engine piston 48 through one first connecting rod 43, and the other hydraulic piston 49 is axially connected with the other combustion engine piston 48 through the other first connecting rod 43.

It should be noted that the oil inlet 42 connected to the hydraulic system 6, the oil outlet 41 connected to the oil storage barrel 1, and the oil outlet 41 connected to the working oil path 5, which are disposed on the hydraulic pump cylinder 12, are always located between the two hydraulic pistons 49, and the oil outlet 41 connected to the oil storage barrel 1 and the oil outlet 41 connected to the working oil path 5 are the same oil outlet 41, and when low-pressure oil is input into the hydraulic pump cylinder 12, the two hydraulic pistons 49 are driven to move synchronously, so as to synchronously drive the combustion engine pistons 48 respectively connected to the two hydraulic pistons 49, and similarly, when the combustion engine pistons 48 move, the hydraulic pistons 49 are also driven to move synchronously. The provision of two engine blocks may increase the output of the engine 9, although other reasonable numbers of engine blocks may be provided.

In addition to the above embodiment, it is further preferable that both the engine cylinders communicate with the hydraulic pump cylinder 12, that the stopper portions 47 for restricting the stroke of the engine piston 48 are provided in both the engine cylinders, and that the hydraulic pump cylinder 12 between the engine piston 48 and the hydraulic piston 49 on the same side is connected to the cooling system.

It should be noted that the limiting portion 47 can limit the movement of the engine piston 48 to prevent the engine piston 48 from blocking the intake valve 44 and the exhaust valve 46 on the engine cylinder, and prevent the engine piston 48 from contacting the oil nozzle 45, so as to also limit the movement stroke of the hydraulic piston 49, and prevent the hydraulic piston 49 from blocking the oil intake and oil discharge of the hydraulic pump cylinder 12. Because the two combustion engine cylinder bodies are symmetrically arranged and the hydraulic pump cylinder 12 is arranged between the two combustion engine cylinder bodies, the connection between the two combustion engine cylinder bodies and the hydraulic pump cylinder 12 is stable and the stress is balanced.

The cooling system comprises a radiator 11 and a pipeline, a cooling liquid inlet and a cooling liquid outlet are arranged on the hydraulic pump cylinder 12, when the hydraulic piston 49 and the combustion engine piston 48 which are connected by the same first connecting rod 43 move, the cooling liquid inlet and the cooling liquid outlet are always positioned between the hydraulic piston 49 and the combustion engine piston 48 which are connected by the same first connecting rod 43, and the hydraulic piston 49 and the combustion engine piston 48 which are connected by the same first connecting rod 43 are not in contact. The radiator 11 outputs cooling liquid to the cooling liquid inlet through a pipeline, and the cooling liquid is discharged from the cooling liquid outlet and enters the radiator 11 again, so that the liquid forms circulating cooling, and the cooling effect is better.

In addition to the above-described embodiments, it is further preferable that both the exhaust valves 46 are connected to the exhaust gas dc generator 10. The exhaust gas discharged from the internal combustion engine 9 can be recycled, and the tail gas direct current generator 10 pushes the turbine to rotate, and direct current is generated by the gravity flow generator to supply power to the system and enter the storage battery, so that the energy efficiency is improved.

On the basis of the above embodiment, as a further preferable option, the power system includes a high-pressure energy storage cabinet 2 connected to the intake system 8 and the hydraulic system 6, the high-pressure energy storage cabinet 2 is communicated with an auxiliary gas cylinder 44, and the auxiliary gas cylinder 44 is used for charging pressure into the high-pressure energy storage cabinet 2 to control the intake system 8 to intake the internal combustion engine 9 and control the hydraulic system 6 to input low-pressure oil into the hydraulic pump cylinder 12.

It should be noted that the high-voltage energy storage cabinet 2 is an air-type high-voltage energy storage cabinet, and is used for providing hydraulic energy to the hydraulic system 6 and the air intake system 8, and the first electromagnetic switch valve 3 is arranged between the high-voltage energy storage cabinet 2 and the auxiliary air cylinder 44. When the engine is started, the auxiliary gas cylinder 44 and the first electromagnetic switch valve 3 are opened, compressed air in the auxiliary gas cylinder 44 enters the high-pressure energy storage cabinet 2 to supplement and pressurize hydraulic oil in the cabinet, so that oil in the high-pressure energy storage cabinet 2 enters the air inlet system 8 and the hydraulic system 6 to control the air inlet system 8 to supply air to the internal combustion engine 9 and control the hydraulic system 6 to input low-pressure oil into the hydraulic pump cylinder 12. Simple structure, convenient processing and installation.

On the basis of the above embodiment, as a further preferable mode, the hydraulic system 6 includes: the first oil cylinder 17 and the second oil cylinder 20 are symmetrically arranged, a first driving oil cylinder 25 is arranged between the first oil cylinder 17 and the second oil cylinder 20, a movable first oil cylinder piston 28 is arranged in the first oil cylinder 17, a movable second oil cylinder piston 23 is arranged in the second oil cylinder 20, a movable first driving piston 24 is arranged in the first driving oil cylinder 25, and the first oil cylinder piston 28 and the second oil cylinder piston 23 are axially connected with the first driving piston 24 through a second connecting rod 19;

a first oil inlet 27 and a first oil outlet 26 are respectively arranged at two ends of the first oil cylinder 17, a second oil inlet 21 and a second oil outlet 22 are respectively arranged at two ends of the second oil cylinder 20, a first oil port 18 is respectively arranged at two ends of the first driving oil cylinder 25, and a first check valve is respectively arranged in the first oil inlet 27 and the second oil inlet 21;

the first oil inlet 27 and the second oil inlet 21 are both connected with the oil storage barrel 1, and the first oil outlet 26 and the second oil outlet 22 are both connected with the hydraulic pump cylinder 12; the first oil ports 18 are connected with the high-voltage energy storage cabinet 2 through the first electromagnetic directional valve 16;

when oil is fed into one end of the first driving oil cylinder 25 and oil is discharged from the other end of the first driving oil cylinder, the first driving piston 24, the first oil cylinder piston 28 and the second oil cylinder piston 23 all move towards the same side, the first oil cylinder piston 28 feeds oil into a first oil inlet 27 at the rear end part of the moving direction of the first oil cylinder piston, and a first oil outlet 26 at the front end of the first oil cylinder piston conveys low-pressure oil into the hydraulic pump cylinder 12; the second cylinder piston 23 feeds oil into a second oil inlet 21 at the rear end of the moving direction of the second cylinder piston, and feeds low-pressure oil into the hydraulic pump cylinder 12 through a second oil outlet 22 at the front end of the moving direction of the second cylinder piston.

It should be noted that, because the two first oil ports 18 are connected to the high-pressure energy storage cabinet 2 through the first electromagnetic directional valve 16, when the high-pressure energy storage cabinet 2 outputs low-pressure oil, the first electromagnetic directional valve 16 switches directions, so that one first oil port 18 is an oil inlet, and the other first oil port 18 is an oil outlet.

When the high-pressure energy storage cabinet 2 is started, namely a compression stroke, low-pressure oil is output, the valve core of the first electromagnetic directional valve 16 moves rightwards or leftwards, one first oil port 18 is an oil inlet, the other second oil port 30 is an oil return port, the oil return port is connected to the oil storage cabinet, at the moment, the first driving piston 24 in the first driving oil cylinder 25 is pressed to rapidly move rightwards or leftwards, and the first driving piston 24 drives the first oil cylinder piston 28 and the second oil cylinder piston 23 to simultaneously move rightwards or leftwards through the second connecting rods 19 at the two ends of the first driving piston 24. When the first cylinder piston 28 and the second cylinder piston 23 move rightwards simultaneously, a first oil inlet 27 on the left side of the first cylinder piston 28 is filled with oil from the oil storage barrel 1, a second oil inlet 21 on the left side of the second cylinder piston 23 is filled with oil from the oil storage barrel 1, and a first oil outlet 26 on the right side of the first cylinder piston 28 and a second oil outlet 22 on the right side of the second cylinder piston 23 output low-pressure oil to the hydraulic pump cylinder 12. At this time, both the engine intake valve 44 and the engine exhaust valve 46 are closed. When the first cylinder piston 28 and the second cylinder piston 23 move leftward simultaneously, the first oil inlet 27 on the right side of the first cylinder piston 28 is filled with oil from the oil storage barrel 1, the second oil inlet 21 on the right side of the second cylinder piston 23 is filled with oil from the oil storage barrel 1, and the first oil outlet 26 on the left side of the first cylinder piston 28 and the second oil outlet 22 on the left side of the second cylinder piston 23 output low-pressure oil to the hydraulic pump cylinder 12. At this time, both the engine intake valve 44 and the engine exhaust valve 46 are closed.

During the exhaust stroke, the internal combustion engine 9 is filled with the combusted waste gas, at this time, the valve core of the first electromagnetic directional valve 16 moves in the reverse direction of the movement during the compression stroke, the original oil inlet is changed into the oil outlet, the original oil outlet is changed into the oil inlet, the first driving piston 24 moves in the reverse direction of the movement during the compression stroke, the second connecting rods 19 at the two ends of the first driving piston drive the first oil cylinder piston 28 and the second oil cylinder piston 23 to move synchronously, the originally opened first oil inlet 27 of the first oil cylinder 17 is closed, the originally closed first oil outlet 41 is opened, the originally opened second oil inlet 21 of the second oil cylinder 20 is closed, and the originally closed second oil outlet 41 is opened. The first cylinder 17 and the second cylinder 20 each feed low pressure oil into the hydraulic pump cylinder 12 as in the compression stroke, except that the engine intake valve 44 is closed and the engine exhaust valve 46 is open during the exhaust stroke.

The hydraulic system 6 with the above structure is provided in this embodiment, so that no matter which direction the first cylinder piston 28 and the second cylinder piston 23 move, low-pressure oil can be input into the hydraulic pump cylinder 12, and the hydraulic system is simple in structure and high in output efficiency.

On the basis of the above embodiment, as a further preferable aspect, the intake system 8 includes: the first cylinder 29 and the second cylinder 32 are symmetrically arranged, a second driving oil cylinder 37 is arranged between the first cylinder 29 and the second cylinder 32, a movable first cylinder piston 40 is arranged in the first cylinder 29, a movable second cylinder piston 35 is arranged in the second cylinder 32, a movable second driving piston 36 is arranged in the second driving oil cylinder 37, and the first cylinder piston 40 and the second cylinder piston 35 are axially connected with the second driving piston 36 through a third connecting rod 31;

a first air inlet 39 and a first air outlet 38 are respectively arranged at two ends of the first air cylinder 29, a second air inlet 33 and a second air outlet 34 are respectively arranged at two ends of the second air cylinder 32, a second oil port 30 is respectively arranged at two ends of the second driving oil cylinder 37, and a second one-way valve is respectively arranged in the first air inlet 39 and the second air inlet 33;

the first air inlet 39 and the second air inlet 33 are both connected with the air filter 14, and the first air outlet 38 and the second air outlet 34 are both connected with the air inlet of the combustion engine; the second oil ports 30 are connected with the high-voltage energy storage cabinet 2 through second electromagnetic directional valves 7;

when oil is fed into one end of the second driving oil cylinder 37 and oil is discharged from the other end of the second driving oil cylinder 37, the second driving piston 36, the first cylinder piston 40 and the second cylinder piston 35 all move towards the same side, the first cylinder piston 40 feeds air towards a first air inlet 39 at the rear end of the moving direction of the first cylinder piston, and feeds air towards an air inlet of the combustion engine from a first air outlet 38 at the front end of the moving direction of the first cylinder piston; the second cylinder piston 35 feeds gas toward the second inlet port 33 at the rear end in its moving direction and the second outlet port 34 at the front end to the engine inlet port.

It should be noted that, because the two second oil ports 30 are both connected to the high-pressure energy storage cabinet 2 through the second electromagnetic directional valve 7, when the high-pressure energy storage cabinet 2 outputs low-pressure oil, the second electromagnetic directional valve 7 switches directions, so that one first oil port 18 is an oil inlet, and the other first oil port 18 is an oil outlet.

During the air inlet stroke, the high-pressure energy storage cabinet 2 outputs low-pressure oil, the valve core of the second electromagnetic directional valve 7 moves rightwards or leftwards, one of the second oil ports 30 is an oil inlet, the other second oil port 30 is an oil return port, the oil return port is connected to the oil storage cabinet, at this time, the second driving piston 36 in the second driving oil cylinder 37 is pressed to rapidly move rightwards or leftwards, and the second driving piston 36 drives the first cylinder piston 40 and the second cylinder piston 35 to simultaneously move rightwards or leftwards through the third connecting rods 31 at the two ends of the second driving piston 36. When the first cylinder piston 40 and the second cylinder piston 35 move rightward simultaneously, the first air inlet 39 on the left side of the first cylinder piston 40 is filled with air through the air cleaner 14, the second air inlet 33 on the left side of the second cylinder piston 35 is filled with air through the air cleaner 14, and the first air outlet 38 on the right side of the first cylinder piston 40 and the second air outlet 34 on the right side of the second cylinder piston 35 output air to the internal combustion engine 9. At this time, the engine intake valve 44 is opened and the engine exhaust valve 46 is closed. When the first cylinder piston 40 and the second cylinder piston 35 move leftward simultaneously, the first air inlet 39 on the right side of the first cylinder piston 40 is supplied with air through the air cleaner 14, the second air inlet 33 on the right side of the second cylinder piston 35 is supplied with air through the air cleaner 14, and the first air outlet 38 on the left side of the first cylinder piston 40 and the second air outlet 34 on the left side of the second cylinder piston 35 output air to the internal combustion engine 9. At this time, the engine intake valve 44 is opened and the engine exhaust valve 46 is closed.

The intake system 8 with the above structure is provided in the present embodiment, and can output gas to the internal combustion engine 9 no matter which direction the first cylinder piston 40 and the second cylinder piston 35 move, and the present embodiment has a simple structure and high output efficiency.

In addition to the above embodiment, it is further preferable that a second electromagnetic opening/closing valve 13 is provided in a pipe line connecting the hydraulic pump cylinder 12 and the storage tank 1. It should be noted that, during the power stroke, the hydraulic pump cylinder 12 outputs oil to the working oil path 5, and the second electromagnetic switch valve 13 is closed, so that the hydraulic pump cylinder 12 only outputs power to the working oil path 5; in the intake stroke, the second electromagnetic switch valve 13 is opened, and the hydraulic oil discharged from the hydraulic pump cylinder 12 enters the oil storage barrel 1 for recycling. In the embodiment, the direction of the hydraulic oil output by the hydraulic pump cylinder 12 can be realized by opening and closing the second electromagnetic switch valve 13, so that the power output and the air intake are realized.

In addition to the above embodiments, as a further preferable mode, the output oil path of the hydraulic pump cylinder 12 is further connected to the high-pressure energy storage tank 2.

It should be noted that, after the high-pressure oil is output from the hydraulic pump cylinder 12 and enters the high-pressure energy storage cabinet 2, the air volume in the high-pressure energy storage cabinet 2 is compressed to achieve the energy storage effect, and meanwhile, a part of the compressed air enters the auxiliary air cylinder 44 through the first electromagnetic switch valve 3, so as to provide a part of air pressure energy when the engine is started next time.

On the basis of the above embodiment, as a further preferred, the oil filter 15 is disposed on the input and output pipelines of the oil storage barrel 1, and the input and output pipelines of the oil storage barrel 1 provided in the present application are the same pipeline, so that the oil filter 15 disposed on the pipeline can filter impurities in the oil liquid.

The power output principle of the utility model is that the hydraulic energy (oil) output by the hydraulic pump cylinder 12 during operation is divided into a small part to enter the first driving cylinder 25 and the second driving cylinder 37 to push the first driving piston 24 or the second driving piston 36 to move so as to provide motive power for the continuous operation of the shaftless internal combustion hydraulic oil pump, because the oil containing volume of the first driving cylinder 25 and the second driving cylinder 37 is much smaller than the oil containing and supplying volume of the hydraulic pump cylinder 12 (because the hydraulic pump cylinder 12 outputs high pressure oil, the first driving cylinder 25 and the second driving cylinder 37 only need to shunt the high pressure oil output by a small part of the hydraulic pump cylinder 12 to push the first driving piston 24 to drive the first cylinder piston 28 and the second cylinder piston 23 to feed a certain volume of hydraulic oil into the hydraulic pump cylinder 12 at low pressure, and push the second driving piston 36 to drive the first cylinder piston 40 and the second cylinder piston 35 to feed a certain volume of air at low pressure into the internal combustion engine 9), about 1/10 of the oil capacity of the hydraulic pump cylinder 12, and the first driving piston 24 and the second driving piston 36 are continuously moved during operation (each consuming hydraulic oil energy of the output 1/10 of the hydraulic pump cylinder 12), so that the hydraulic energy output from the working oil path 5 is 100% -10% -80%.

Except above-mentioned shaftless internal combustion hydraulic oil pump, the utility model also provides an excavator, include: the shaftless internal combustion hydraulic oil pump disclosed by any one of the embodiments is arranged on the machine body. For the structure of other parts of the excavator, reference is made to the prior art, and details are not repeated herein.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

It is right above that the utility model provides a shaftless internal combustion hydraulic oil pump and excavator introduce in detail. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. A shaftless internal combustion hydraulic oil pump, comprising: a hydraulic pump cylinder (12) and a four-stroke internal combustion engine (9), wherein an engine piston (48) of the internal combustion engine (9) is synchronously connected with a hydraulic piston (49) in the hydraulic pump cylinder (12) axially through a first connecting rod (43);

the internal combustion engine (9) is connected with an air inlet system (8) for introducing air into the internal combustion engine (9), the hydraulic pump cylinder (12) is connected with the oil storage barrel (1), and when the air inlet system (8) introduces air into the internal combustion engine (9), oil in the hydraulic pump cylinder (12) is discharged into the oil storage barrel (1);

the hydraulic pump cylinder (12) is connected with a hydraulic system (6) which is used for inputting oil pressure into the hydraulic pump cylinder (12) to push the internal combustion engine piston (48) to compress or discharge gas in the internal combustion engine (9);

the hydraulic pump cylinder (12) is connected with a working oil way (5), and mechanical energy output by the internal combustion engine (9) is used for driving the hydraulic piston (49) to discharge oil in the hydraulic pump cylinder (12) into the working oil way (5) to output power;

the hydraulic system (6) and the air inlet system (8) are both connected with a power system.

2. The shaftless internal combustion hydraulic oil pump according to claim 1, wherein the internal combustion engine (9) comprises: the two ends of the two combustion engine cylinder bodies are respectively provided with an inlet valve (44) and an exhaust valve (46), the two combustion engine cylinder bodies are respectively provided with an oil nozzle (45) for injecting oil into the two combustion engine cylinder bodies, and each combustion engine cylinder body is internally provided with a movable combustion engine piston (48); two movable hydraulic pistons (49) are symmetrically arranged in the hydraulic pump cylinder (12), one hydraulic piston (49) is axially connected with one combustion engine piston (48) through one first connecting rod (43), and the other hydraulic piston (49) is axially connected with the other combustion engine piston (48) through the other first connecting rod (43).

3. The shaftless internal combustion hydraulic oil pump according to claim 2, wherein both of the combustion engine cylinders are communicated with the hydraulic pump cylinder (12), a limit portion (47) for limiting the stroke of the combustion engine piston (48) is arranged in each of the combustion engine cylinders, and the hydraulic pump cylinder (12) between the combustion engine piston (48) and the hydraulic piston (49) on the same side is connected to a cooling system.

4. The shaftless internal combustion hydraulic oil pump according to claim 3, wherein both exhaust valves (46) are connected to an exhaust gas flow-through generator (10).

5. The shaftless internal combustion hydraulic oil pump according to claim 1, wherein the power system comprises a high-pressure energy storage tank (2) connected with the air intake system (8) and the hydraulic system (6), the high-pressure energy storage tank (2) is communicated with an auxiliary gas cylinder (4), and the auxiliary gas cylinder (4) is used for charging the high-pressure energy storage tank (2) with pressure to control the air intake system (8) to the internal combustion engine (9) and control the hydraulic system (6) to input low-pressure oil into the hydraulic pump cylinder (12).

6. The shaftless internal combustion hydraulic oil pump according to claim 5, wherein the hydraulic system (6) comprises: the oil cylinder device comprises a first oil cylinder (17) and a second oil cylinder (20) which are symmetrically arranged, wherein a first driving oil cylinder (25) is arranged between the first oil cylinder (17) and the second oil cylinder (20), a movable first oil cylinder piston (28) is arranged in the first oil cylinder (17), a movable second oil cylinder piston (23) is arranged in the second oil cylinder (20), a movable first driving piston (24) is arranged in the first driving oil cylinder (25), and the first oil cylinder piston (28) and the second oil cylinder piston (23) are axially connected with the first driving piston (24) through a second connecting rod (19);

a first oil inlet (27) and a first oil outlet (26) are respectively formed in two ends of the first oil cylinder (17), a second oil inlet (21) and a second oil outlet (22) are respectively formed in two ends of the second oil cylinder (20), a first oil port (18) is respectively formed in two ends of the first driving oil cylinder (25), and first check valves are respectively arranged in the first oil inlet (27) and the second oil inlet (21);

the first oil inlet (27) and the second oil inlet (21) are both connected with an oil storage barrel (1), and the first oil outlet (26) and the second oil outlet (22) are both connected with the hydraulic pump cylinder (12); the first oil ports (18) are connected with the high-pressure energy storage cabinet (2) through first electromagnetic directional valves (16);

when oil is fed into one end of the first driving oil cylinder (25) and oil is discharged from the other end of the first driving oil cylinder, the first driving piston (24), the first oil cylinder piston (28) and the second oil cylinder piston (23) all move towards the same side, the first oil cylinder piston (28) feeds oil into the first oil inlet (27) at the rear end in the moving direction, and the first oil outlet (26) at the front end conveys low-pressure oil into the hydraulic pump cylinder (12); the second oil cylinder piston (23) feeds oil into the second oil inlet (21) at the rear end of the moving direction of the second oil cylinder piston, and the second oil outlet (22) at the front end of the second oil cylinder piston conveys low-pressure oil into the hydraulic pump cylinder (12).

7. The shaftless internal combustion hydraulic oil pump according to claim 6, wherein the intake system (8) comprises: the air cylinder assembly comprises a first air cylinder (29) and a second air cylinder (32) which are symmetrically arranged, wherein a second driving oil cylinder (37) is arranged between the first air cylinder (29) and the second air cylinder (32), a movable first air cylinder piston (40) is arranged in the first air cylinder (29), a movable second air cylinder piston (35) is arranged in the second air cylinder (32), a movable second driving piston (36) is arranged in the second driving oil cylinder (37), and the first air cylinder piston (40) and the second air cylinder piston (35) are axially connected with the second driving piston (36) through a third connecting rod (31);

a first air inlet (39) and a first air outlet (38) are arranged at two ends of the first air cylinder (29), a second air inlet (33) and a second air outlet (34) are arranged at two ends of the second air cylinder (32), a second oil port (30) is arranged at two ends of the second driving oil cylinder (37), and second one-way valves are arranged in the first air inlet (39) and the second air inlet (33);

the first air inlet (39) and the second air inlet (33) are both connected with an air filter (14), and the first air outlet (38) and the second air outlet (34) are both connected with an air inlet of a combustion engine; the second oil ports (30) are connected with the high-pressure energy storage cabinet (2) through second electromagnetic directional valves (7);

when oil is fed into one end of the second driving oil cylinder (37) and oil is discharged from the other end of the second driving oil cylinder, the second driving piston (36), the first cylinder piston (40) and the second cylinder piston (35) all move towards the same side, the first cylinder piston (40) enters air towards the first air inlet (39) at the end part of the rear end of the moving direction of the first cylinder piston, and enters air towards the air inlet of the combustion engine through the first air outlet (38) at the front end of the first cylinder piston; the second cylinder piston (35) conveys gas towards the second inlet port (33) at the rear end of the second cylinder piston in the moving direction of the second cylinder piston, and conveys gas towards the combustion engine inlet port from the second outlet port (34) at the front end of the second cylinder piston.

8. The shaftless internal combustion hydraulic oil pump according to claim 7, wherein a second electromagnetic switch valve (13) is provided on a pipeline connecting the hydraulic pump cylinder (12) and the oil storage barrel (1).

9. The shaftless internal combustion hydraulic oil pump according to any one of claims 5 to 8, wherein the output oil circuit of the hydraulic pump cylinder (12) is further connected to the high-pressure energy storage tank (2).

10. An excavator, comprising: a fuselage and the shaftless internal combustion hydraulic oil pump of any one of claims 1 to 9 provided on the fuselage.