CN107237787A - A kind of tobacco harvesting machine of use Closed Hydraulic Driving system - Google Patents
A kind of tobacco harvesting machine of use Closed Hydraulic Driving system Download PDFInfo
- Publication number
- CN107237787A CN107237787A CN201710289655.9A CN201710289655A CN107237787A CN 107237787 A CN107237787 A CN 107237787A CN 201710289655 A CN201710289655 A CN 201710289655A CN 107237787 A CN107237787 A CN 107237787A
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- China
- Prior art keywords
- hydraulic
- motor assembly
- hydraulic motor
- walking
- assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D45/00—Harvesting of standing crops
- A01D45/16—Harvesting of standing crops of tobacco
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Motor Power Transmission Devices (AREA)
Abstract
A kind of tobacco harvesting machine of use closed type hydraulic system driving, including fuel tank and the hydraulic circuit that be connected with fuel tank, the hydraulic circuit include the feed circuit and oil return circuit that setting is connected with fuel tank in walking hydraulic pressure pump assembly, the walking hydraulic assembly；Trailing wheel hydraulic motor assembly I and trailing wheel hydraulic motor assembly II, the trailing wheel hydraulic motor assembly I and trailing wheel hydraulic motor assembly II are connected with walking hydraulic pressure pump assembly by oil circuit, and have the oil circuit for setting brake valve between the trailing wheel hydraulic motor assembly I and trailing wheel hydraulic motor assembly II and walking hydraulic pressure pump assembly；Front-wheel hydraulic motor assembly, the front-wheel hydraulic motor assembly is connected with walking hydraulic pressure pump assembly by oil circuit.In closed system, the oil inlet pipe of hydraulic pump is directly connected with the oil return pipe of executive component, and hydraulic fluid carries out closed circulation in the pipeline of system.Closed system structure is more compact, less with air contact chance, and air is difficult infiltration system, therefore the stationarity of transmission is good.
Description
Technical field
The present invention relates to the tobacco harvesting machine driven using closed type hydraulic system.
Background technology
China develops tobacco harvester since the nineties, due to many reasons, makes slow progress, and at present, does not have also
Important breakthrough, most tobacco leaf picking still uses handwork, and expense of labor account for the proportion of maximum in production cost.
In general, China's tobacco leaf picking machine type is to copy external large-scale tobacco leaf picking machine to improve to form.Pass through transformation
Harvesting and the dynamical system of driving, to be applicable the present situation of the current agricultural production of China.
External tobacco leaf harvest machinery uses hydraulic-driven mostly, due to external hydraulic pressure original paper relative mass and efficiency all
Compare high, stable drive, the probability that oil leak occurs is also fewer, therefore external tobacco harvesting machine tool is nearly all driven using hydraulic pressure
It is dynamic, the variable speed of road speed is easily realized using hydraulic power in driving drive part.
The problem of prior art is present and shortcoming：
Also there are several tobacco harvesting machines in the country at present, but is driven only with machine driving driving or open type hydraulic system.Machine
Although tool is driven low cost, the kind of drive is complicated, and low-speed stability is poor, and can not realize variable speed.Open hydraulic system
System solves mechanically operated kind of drive challenge, but can not solve riding stability well and variable speed is asked
Topic.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of tobacco harvesting machine of use closed type hydraulic system driving, with
Solve the problem of prior art is present.
In order to solve the above technical problems, the present invention uses following technical scheme：
A kind of tobacco harvesting machine of use closed type hydraulic system driving, including fuel tank 20 and the hydraulic circuit that is connected with fuel tank 20,
The hydraulic circuit includes：
The feed circuit being connected with fuel tank 20 and oil return circuit are set in walking hydraulic pressure pump assembly 1, the walking hydraulic assembly 1；
Trailing wheel hydraulic motor assembly I 7 and trailing wheel hydraulic motor assembly II 11, the trailing wheel hydraulic motor assembly I 7 and trailing wheel hydraulic pressure
Motor assembly II 11 is connected with walking hydraulic pressure pump assembly 1 by oil circuit, and the trailing wheel hydraulic motor assembly I 7 and trailing wheel hydraulic pressure
There is the oil circuit for setting brake valve 5 between motor assembly II 11 and walking hydraulic pressure pump assembly 1；
Front-wheel hydraulic motor assembly 15, the front-wheel hydraulic motor assembly 15 is connected with walking hydraulic pressure pump assembly 1 by oil circuit.
Feed circuit in the walking hydraulic pressure pump assembly 1 includes the repairing gear pump 4 being connected with fuel tank 20, repairing gear
Plunger pump 3 is connected with pump 4, oil return circuit includes safety valve 6, and safety valve 6 connects fuel tank by radiator 18, filter 19
20, plunger pump 3 passes through oil circuit connection safety valve 6, trailing wheel hydraulic motor assembly I 7, trailing wheel hydraulic motor assembly II 11, front-wheel liquid
Pressure motor assembly 15.
The trailing wheel hydraulic motor assembly I 7 includes left rear wheel walking piston motor 9 and left rear wheel brake 8, trailing wheel hydraulic pressure
Motor assembly II 11 includes off hind wheel walking piston motor 13 and off hind wheel brake 12, left rear wheel walking piston motor 9 and the right side
Trailing wheel walking piston motor 13 connects plunger pump 3 by oil circuit, and left rear wheel brake 8 and off hind wheel brake 12 pass through brake
The connection repairing of valve 5 gear pump 4.
The front-wheel hydraulic motor assembly 15 includes front-wheel walking piston motor 16, and the front-wheel walking piston motor 16 leads to
Cross oil circuit connection plunger pump 3.
The safety valve 6 is the valve block comprising a safety valve and four check valve formation.
The present invention has advantages below:
1. in closed system, the oil inlet pipe of hydraulic pump is directly connected with the oil return pipe of executive component, and hydraulic fluid is in system
Closed circulation is carried out in pipeline.Closed system structure is more compact, less with air contact chance, and air is difficult infiltration system,
Therefore the stationarity of transmission is good.
2. the speed change of operating mechanism and commutation are by the stroking mechanism realization of regulation pump or motor, it is to avoid changed in open system
To the hydraulic shock appeared in process and energy loss.
3. closed system takes bidirectional variable hydraulic pump, the flow of hydraulic oil and side in working connection are changed by the variable of pump
To realize speed change and the commutation of fulfiling mechanism, this adjusting method sufficient can embody hydraulicdriven strong point.
4. current closed system variable pump is integrated structure, the function valve group collection such as slippage pump and repairing, overflow, control
Into on hydraulic pump, making pipeline connection become simple, installing space is not only reduced, and reduce what is caused by pipeline connection
Leakage and pipe vibration, improve the reliability of system, simplify operating process.
5. oil-supplementing system can not only ensure the response of positive displacement transmission when the discharge capacity of main pump changes, system is improved
Operating frequency, moreover it is possible to increase pressure at main pump oil inlet, prevents from producing cavitation erosion during big flow, can effectively improve the rotating speed of pump and prevent
Only pumping is empty, improves working life;Filter is housed in oil-supplementing system, the reliability and service life of transmission device is improved;Separately
Outside, slippage pump can easily also provide power for some low pressure auxiliary bodies.
6. being drawn due to only having a small amount of fluid from fuel tank, the loss of oil plant is reduced.
7. carry parking device（Hydraulic control brake disc）Motor, solve parking well and start that supercharging is anti-to creep
Problem, can provide good parking performance and start reliability.
Brief description of the drawings
Fig. 1 is the schematic diagram of present hydraulic system.
Wherein, 1- walkings hydraulic pressure pump assembly, 2- electromagnetism swash plate adjusters, 3- plunger pumps, 4- repairing gear pumps, 5- brakes
Valve, 6- safety valves, 7- left rear wheel hydraulic motor assemblies, 8- left rear wheel brakes, 9- left rear wheels walking plunger horse, 10- left rear wheels
Walking piston motor swash plate electromagnetic regulator, 11- off hind wheel hydraulic motor assemblies, 12- off hind wheel brakes, 13- off hind wheel rows
Walk piston motor, 14- off hind wheels walking piston motor swash plate electromagnetic regulator, 15- front-wheel hydraulic motor assemblies, 16- front-wheel rows
Walk piston motor, 17- front-wheels walking piston motor swash plate electromagnetic regulator, 18- radiators, 19- filters, 20- fuel tanks.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
The present invention provides a kind of tobacco harvesting machine of use closed type hydraulic system driving, including fuel tank 20 and connects with fuel tank 20
The hydraulic circuit connect, hydraulic circuit includes following sections.
Include walking hydraulic pressure pump assembly 1 first, walking hydraulic assembly 1 has the feed circuit and oil return being connected with fuel tank 20
Loop.
Also include trailing wheel hydraulic motor assembly I 7 and trailing wheel hydraulic motor assembly II 11, trailing wheel hydraulic motor assembly I 7 is with after
Connected between the feed circuit of wheel hydraulic motor assembly II 11 and walking hydraulic pressure pump assembly 1 and oil return circuit by oil circuit, and
They connect trailing wheel hydraulic motor assembly I 7 and trailing wheel hydraulic motor assembly II by the other oil circuit for being provided with brake valve 5
11。
Also include front-wheel hydraulic motor assembly 15, front-wheel hydraulic motor assembly 15 passes through oil circuit with walking hydraulic pressure pump assembly 1
Connection, the oil circuit equally connects trailing wheel hydraulic motor assembly I 7 and trailing wheel hydraulic motor assembly II 11.
The feed circuit set in above-mentioned walking hydraulic pressure pump assembly 1 includes the repairing gear pump 4 being connected with fuel tank 20, mends
Plunger pump 3 is connected with oilgear pump 4, oil return circuit includes safety valve 6, and safety valve 6 is connected by radiator 18, filter 19
Fuel tank 20.Plunger pump 3 passes through oil circuit connection safety valve 6, trailing wheel hydraulic motor assembly I 7, trailing wheel hydraulic motor assembly II 11, preceding
Take turns hydraulic motor assembly 15.
As shown in figure 1, trailing wheel hydraulic motor assembly I 7, trailing wheel hydraulic motor assembly II 11, front-wheel hydraulic motor assembly 15
The two ends of plunger pump 3 are connected to by identical oil circuit
Trailing wheel hydraulic motor assembly I 7 includes left rear wheel walking piston motor 9 and left rear wheel brake 8, trailing wheel hydraulic motor assembly
II 11 include off hind wheel walking piston motor 13 and off hind wheel brake 12, and left rear wheel walking piston motor 9 is walked with off hind wheel
Piston motor 13 connects plunger pump 3 by oil circuit, and left rear wheel brake 8 and off hind wheel brake 12 are connected by brake valve 5
Repairing gear pump 4.
Front-wheel hydraulic motor assembly 15 includes front-wheel walking piston motor 16, and the front-wheel walking piston motor 16 passes through oil
Road connects plunger pump 3.
Safety valve 6 is that four check valves are gone here and there two-by-two in the valve block comprising a safety valve and the formation of four check valves, valve block
Connection forms the both sides that oil circuit is connected to plunger pump 3, and one of safety valve one end connects the oil circuit of repairing gear pump 4 and gone here and there two-by-two
The centre of the check valve of connection, the other end connects fuel tank 20 by radiator 18 and filter 19 simultaneously and carries out oil return.
As shown in Figure 1, the oil inlet IN for the oil pipe connection walking hydraulic pressure pump assembly 1 drawn in above-mentioned fuel tank 20, walking
The oil return inlet T of hydraulic pressure pump assembly 1 is sequentially connected radiator 18, filter 19 and then oil return box 20, the work of walking hydraulic pressure pump assembly 1
Make mouth A, B connect respectively front-wheel motor assembly 15, A, B mouth of left rear wheel motor assembly 11, and off hind wheel motor assembly 7 B,
A mouthfuls, the parallel connection of three motors can be realized；The H mouths of walking hydraulic pressure pump assembly 1 connect the P mouths of brake valve 5 simultaneously, and brake electromagnetism
The brake hydraulic fluid port of the A mouths connection trailing wheel running motor assembly 7,11 of valve 5, the T mouths connection fuel tank 20 of brake magnetic valve 5.
The present invention hydraulic principle be：
During parking：The electromagnetism swash plate adjuster 2 of walking hydraulic pressure pump assembly 1, the left rear wheel walking post of trailing wheel hydraulic motor assembly I 7
Fill in the off hind wheel walking piston motor swash plate electromagnetic regulator of motor swashplate electromagnetic regulator 10, trailing wheel hydraulic motor assembly II 11
14th, the front-wheel walking piston motor swash plate electromagnetic regulator 17 of front-wheel hydraulic motor assembly 15 all returns middle position, and swash plate angle is zero,
Each plunger pumpage is zero, it is ensured that without driving force；The now brake upper work of magnetic valve 5, trailing wheel hydraulic motor assembly I 7,
Left rear wheel brake 8, off hind wheel brake 12 in trailing wheel hydraulic motor assembly II 11 are in locking state, and locked trailing wheel is realized
Parking.
Walk backward forward：Electromagnetism swash plate adjuster 2 in walking hydraulic pressure pump assembly 1 departs from middle position so that plunger pump 3
Swash plate departs from middle position, and plunger pump 3 has begun with discharge capacity, produces hydraulic flow, at the same adjust trailing wheel hydraulic motor assembly I 77, after
Take turns hydraulic motor assembly II 11, front-wheel hydraulic motor assembly 15 so that the left rear wheel walking plunger of trailing wheel hydraulic motor assembly I 7
The off hind wheel walking piston motor swash plate electromagnetic regulator of motor swashplate electromagnetic regulator 10, trailing wheel hydraulic motor assembly II 11
14th, the front-wheel walking piston motor swash plate electromagnetic regulator 17 of front-wheel hydraulic motor assembly 15 departs under middle position, brake magnetic valve 5
Position work, left rear wheel brake 8, off hind wheel brake 12 are with oil and depart from locking, can be with running motor under hydraulic oil effect
Realize and rotate.
Speed shelves with it is fast at a slow speed：Pass through control panel speed shelves button, regulation trailing wheel hydraulic motor assembly I 77, trailing wheel liquid
Pressure motor assembly II 11, front-wheel hydraulic motor assembly 15 so that the left rear wheel walking piston motor of trailing wheel hydraulic motor assembly I 7
It is swash plate electromagnetic regulator 10, the off hind wheel walking piston motor swash plate electromagnetic regulator 14 of trailing wheel hydraulic motor assembly II 11, preceding
The front-wheel walking piston motor swash plate electromagnetic regulator 17 for taking turns hydraulic motor assembly 15 departs from the scope of middle position, realize discharge capacity etc.
Level change, while controlling the deflection angle of the electromagnetism swash plate adjuster 2 in walking hydraulic pressure pump assembly 1 to realize that discharge capacity connects by handle
Continuous change, realizes changing at a slow speed soon in gear.
Brake：Handle returns middle position, and each pump and motor displacement are zero, the upper work of magnetic valve 5 of braking, brake return,
Car slipping is braked, backward spanner handle, and the swash plate reversion of each pump and motor, negative sense pump oil is pulled more after producing reverse actuating force, handle
Resolutely, brake force is bigger.
Advantages of the present invention is
1. in closed system, the oil inlet pipe of hydraulic pump is directly connected with the oil return pipe of executive component, and hydraulic fluid is in system
Closed circulation is carried out in pipeline.Closed system structure is more compact, less with air contact chance, and air is difficult infiltration system,
Therefore the stationarity of transmission is good.
2. the speed change of operating mechanism and commutation are by the stroking mechanism realization of regulation pump or motor, it is to avoid changed in open system
To the hydraulic shock appeared in process and energy loss.
3. closed system takes bidirectional variable hydraulic pump, the flow of hydraulic oil and side in working connection are changed by the variable of pump
To realize speed change and the commutation of fulfiling mechanism, this restraining method sufficient can embody hydraulicdriven strong point.
4. current closed system variable pump is integrated structure, the function valve group collection such as slippage pump and repairing, overflow, control
Into on hydraulic pump, making pipeline connection become simple, installing space is not only reduced, and reduce what is caused by pipeline connection
Leakage and pipe vibration, improve the reliability of system, simplify operating process.
5. oil-supplementing system can not only ensure the response of positive displacement transmission when the discharge capacity of main pump changes, system is improved
Operating frequency, moreover it is possible to increase pressure at main pump oil inlet, prevents from producing cavitation erosion during big flow, can effectively improve the rotating speed of pump and prevent
Only pumping is empty, improves working life;Filter is housed in oil-supplementing system, the reliability and service life of transmission device is improved;Separately
Outside, slippage pump can easily also provide power for some low pressure auxiliary bodies.
6. being drawn due to only having a small amount of fluid from fuel tank, the loss of fuel tank is reduced.
7. carry parking device（Hydraulic control brake disc）Motor, solve parking well and start that supercharging is anti-to creep
Problem, can provide good parking performance and start reliability.
Above-described is only the preferred embodiment of the present invention, it is noted that for those skilled in the art,
Under the premise of general idea of the present invention is not departed from, some changes and improvements can also be made, these should also be considered as the present invention's
Protection domain.
Claims (5)
1. a kind of tobacco harvesting machine of use closed type hydraulic system driving, it is characterised in that：Including fuel tank（20）With with fuel tank
（20）The hydraulic circuit of connection, the hydraulic circuit includes：
Walking hydraulic pressure pump assembly（1）, the walking hydraulic assembly（1）Interior setting and fuel tank（20）The feed circuit and oil return of connection
Loop；
Trailing wheel hydraulic motor assembly I（7）With trailing wheel hydraulic motor assembly II（11）, the trailing wheel hydraulic motor assembly I（7）With it is rear
Take turns hydraulic motor assembly II（11）With walking hydraulic pressure pump assembly（1）Connected by oil circuit, and the trailing wheel hydraulic motor assembly I
（7）With trailing wheel hydraulic motor assembly II（11）With walking hydraulic pressure pump assembly（1）Between have set brake valve（5）Oil circuit；
Front-wheel hydraulic motor assembly（15）, the front-wheel hydraulic motor assembly（15）With walking hydraulic pressure pump assembly（1）Pass through oil circuit
Connection.
2. a kind of tobacco harvesting machine of use closed type hydraulic system driving according to claim 1, it is characterised in that：It is described
Walking hydraulic pressure pump assembly（1）Interior feed circuit includes and fuel tank（20）The repairing gear pump of connection（4）, repairing gear pump（4）
On be connected with plunger pump（3）, oil return circuit include safety valve（6）, safety valve（6）Pass through radiator（18）, filter（19）Even
Connected tank（20）, plunger pump（3）Pass through oil circuit connection safety valve（6）, trailing wheel hydraulic motor assembly I（7）, trailing wheel hydraulic motor it is total
Into II（11）, front-wheel hydraulic motor assembly（15）.
3. a kind of tobacco harvesting machine of use closed type hydraulic system driving according to claim 2, it is characterised in that：It is described
Trailing wheel hydraulic motor assembly I（7）Including left rear wheel walking piston motor（9）With left rear wheel brake（8）, trailing wheel hydraulic motor is total
Into II（11）Including off hind wheel walking piston motor（13）With off hind wheel brake（12）, left rear wheel walking piston motor（9）With
Off hind wheel walking piston motor（13）Plunger pump is connected by oil circuit（3）, left rear wheel brake（8）With off hind wheel brake
（12）Pass through brake valve（5）Connect repairing gear pump（4）.
4. a kind of tobacco harvesting machine of use closed type hydraulic system driving according to claim 2, it is characterised in that：It is described
Front-wheel hydraulic motor assembly（15）Including front-wheel walking piston motor（16）, the front-wheel walking piston motor（16）Pass through oil circuit
Connect plunger pump（3）.
5. a kind of tobacco harvesting machine of use closed type hydraulic system driving according to claim 1, it is characterised in that：It is described
Safety valve（6）For the valve block comprising a safety valve and four check valve formation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710289655.9A CN107237787A (en) | 2017-04-27 | 2017-04-27 | A kind of tobacco harvesting machine of use Closed Hydraulic Driving system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710289655.9A CN107237787A (en) | 2017-04-27 | 2017-04-27 | A kind of tobacco harvesting machine of use Closed Hydraulic Driving system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107237787A true CN107237787A (en) | 2017-10-10 |
Family
ID=59984280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710289655.9A Pending CN107237787A (en) | 2017-04-27 | 2017-04-27 | A kind of tobacco harvesting machine of use Closed Hydraulic Driving system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107237787A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109099020A (en) * | 2018-08-31 | 2018-12-28 | 三汽车制造有限公司 | Milling machine auxiliary control hydraulic system and milling machine |
| CN110989741A (en) * | 2019-11-26 | 2020-04-10 | 广东申菱环境系统股份有限公司 | Liquid supplementing system and control method thereof |
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| JP2000145721A (en) * | 1998-11-06 | 2000-05-26 | Komatsu Ltd | Hydraulic circuit for work vehicle |
| CN202088879U (en) * | 2011-06-01 | 2011-12-28 | 公安部上海消防研究所 | Hydraulically-driven rail driving system for rail fire truck |
| CN102773397A (en) * | 2012-07-18 | 2012-11-14 | 中国重型机械研究院有限公司 | Walking closed system of forging manipulator |
| US20130298545A1 (en) * | 2011-02-07 | 2013-11-14 | Torsten Berg | Hydrostatic system configured to be integrated in an excavator |
| CN103967859A (en) * | 2014-05-23 | 2014-08-06 | 兰州兰石集团有限公司 | Closed hydraulic system for controlling stable rotation of upper roller on four-roller veneer reeling machine |
| CN105060137A (en) * | 2015-08-03 | 2015-11-18 | 河南省三马起重机械有限公司 | No-explosionproof valve lifting system of crawler crane |
-
2017
- 2017-04-27 CN CN201710289655.9A patent/CN107237787A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000145721A (en) * | 1998-11-06 | 2000-05-26 | Komatsu Ltd | Hydraulic circuit for work vehicle |
| US20130298545A1 (en) * | 2011-02-07 | 2013-11-14 | Torsten Berg | Hydrostatic system configured to be integrated in an excavator |
| CN202088879U (en) * | 2011-06-01 | 2011-12-28 | 公安部上海消防研究所 | Hydraulically-driven rail driving system for rail fire truck |
| CN102773397A (en) * | 2012-07-18 | 2012-11-14 | 中国重型机械研究院有限公司 | Walking closed system of forging manipulator |
| CN103967859A (en) * | 2014-05-23 | 2014-08-06 | 兰州兰石集团有限公司 | Closed hydraulic system for controlling stable rotation of upper roller on four-roller veneer reeling machine |
| CN105060137A (en) * | 2015-08-03 | 2015-11-18 | 河南省三马起重机械有限公司 | No-explosionproof valve lifting system of crawler crane |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109099020A (en) * | 2018-08-31 | 2018-12-28 | 三汽车制造有限公司 | Milling machine auxiliary control hydraulic system and milling machine |
| CN110989741A (en) * | 2019-11-26 | 2020-04-10 | 广东申菱环境系统股份有限公司 | Liquid supplementing system and control method thereof |
| CN110989741B (en) * | 2019-11-26 | 2021-08-06 | 广东申菱环境系统股份有限公司 | Liquid supplementing system and control method thereof |
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Application publication date: 20171010 |
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