CN106015146B - A kind of built-in pressure distributor - Google Patents
A kind of built-in pressure distributor Download PDFInfo
- Publication number
- CN106015146B CN106015146B CN201610566333.XA CN201610566333A CN106015146B CN 106015146 B CN106015146 B CN 106015146B CN 201610566333 A CN201610566333 A CN 201610566333A CN 106015146 B CN106015146 B CN 106015146B
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- Prior art keywords
- valve
- oil
- lowering
- oil return
- main control
- 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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- 239000003921 oil Substances 0.000 claims abstract description 202
- 230000007423 decrease Effects 0.000 claims abstract description 16
- 239000010727 cylinder oil Substances 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 230000001105 regulatory effect Effects 0.000 claims description 15
- 230000007246 mechanism Effects 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 4
- 239000000446 fuel Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000004062 sedimentation Methods 0.000 abstract description 6
- 230000008439 repair process Effects 0.000 abstract description 2
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 230000011218 segmentation Effects 0.000 description 5
- 230000007935 neutral effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000916 dilatatory effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009313 farming Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/023—Excess flow valves, e.g. for locking cylinders in case of hose burst
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or valve
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Check Valves (AREA)
Abstract
The invention discloses a kind of built-in pressure distributors, including distributor body and the main control valve of enclosure interior, oil return valve, check valve；Distributor body is equipped with oil inlet, oil cylinder oil inlet mouth, oil return opening；It is additionally provided with lowering valve in main control valve opening, lowering valve clamping sleeve and lowering valve adjustment bolt are equipped on the right side of lowering valve, lowering valve is arranged on the right side of main control valve, and oil cylinder oil inlet mouth is connected by oil cylinder draining oil circuit with the oil suction chamber of lowering valve, and the oil outlet chamber of lowering valve is connected with the oil return opening；Lowering valve includes declining spool and declining valve seat, and lowering valve clamping sleeve, which compresses, declines valve seat, and lowering valve adjustment bolt is pressed on lowering valve clamping sleeve.Pressure distributor built in the present invention improves decline, promotes sensitivity, and the quiet sedimentation value of hydraulic rockshaft ensures by the sealing state of lowering valve and check valve, relatively reliable, good airproof performance, control are sensitive, and performance is stablized, and reliability is high, convenient disassembly, it is easy to repair.
Description
Technical field
The present invention relates to a kind of pressure distributor more particularly to a kind of built-in pressure distributors.
Background technology
The effect of hydraulic pressure elevator of tractor is connection and traction farm implements, manipulates the lifting of farm implements, controls the farming of farm implements
Depth increases weight to tractor driving wheel, to improve the adhesion property of tractor, hydraulic energy is output on Work machine and carries out it
It is operated.Wherein pressure distributor is the core component of hydraulic control system, and effect is the pressure for controlling hydraulic system, flow
And direction, responsible pass through control the actions such as hydraulic cylinder realization control hydraulic rockshaft completion promotion, neutral, decline, performance
There is directly great influence to entire tractor hydraulic suspension arrangement performance.
In recent years, tractor manufacture, development progress are accelerated, and Development Trend is inclined to high-performance, high-precision.It is as shown in Figure 1
Traditional pressure distributor, traditional pressure distributor it include distributor body and the master that is arranged in the distributor body
Control valve, check valve, oil return valve, main control valve are mounted in main control valve opening by main control valve pocket 13, are had the following disadvantages：
1, the quiet sedimentation value of hydraulic rockshaft ensures mainly by gap between main control valve and main control valve pocket, and quiet sedimentation value refers to that farm implements exist
The ratio of entire stroke is accounted for after being promoted to extreme higher position because focusing on the distance of automatic descending in half-hour period certainly, it is existing dilatory
Quiet sedimentation value is generally 4% or so when dispatching from the factory for machine lifter, if can be decreased obviously using quiet sedimentation value for a long time.2, hydraulic pressure lift
Handle idle stroke is big when the control of device handle is promoted and declined, and is promoted and is segmented between 20~40, declines segmentation at 160~180 sections
Between, it is unfavorable for accurately controlling.
Invention content
Technical problem to be solved by the invention is to provide a kind of built-in pressure distributors, solve the deficiencies in the prior art.
The technical solution that the present invention solves above-mentioned technical problem is as follows：A kind of built-in pressure distributor, including distributor shell
The right side of body, the distributor body is equipped with main valve protecgulum, and the distributor body is internally provided with main control valve, oil return valve, list
To valve；The distributor body is equipped with oil inlet, oil cylinder oil inlet mouth, oil return opening；The main control valve is mounted on main control valve
In hole, the oil return valve is mounted in oil return valve opening, and the check valve is mounted in unidirectional valve opening, which is characterized in that the master
It controls and oil communication, the main control valve opening and the unidirectional valve opening is controlled by oil return valve between valve opening and the oil return valve opening
Between be connected with the oil inlet by the oil suction chamber of oil return valve described in oil cylinder draining oil communication, the draining of the oil return valve
Chamber is connected with the oil return opening, and the oil suction chamber of the check valve is connected with the oil inlet, the oil outlet chamber of the check valve
It is connected with the oil cylinder oil inlet mouth；Lowering valve is additionally provided in the main control valve opening, the lowering valve is arranged in the master control
The right side of valve processed, the oil cylinder oil inlet mouth is connected by the oil cylinder draining oil circuit with the oil suction chamber of the lowering valve, described
The oil outlet chamber of lowering valve is connected with the oil return opening；The lowering valve includes declining spool and decline valve seat, the lowering valve
Cover for seat is in the main control valve opening, and the right side of the lowering valve is equipped with regulating mechanism, and the regulating mechanism includes lowering valve
Clamping sleeve and lowering valve adjustment bolt, the main valve protecgulum are equipped with adjusting cavity, the decline at the correspondence main control valve opening
Valve clamping sleeve is equipped with lowering valve oil return hole, and the lowering valve compression is set in the adjusting cavity, and the lowering valve compresses
Set is in bell shape, and open end is pressed on the decline valve seat, and the lowering valve adjustment bolt is arranged in the adjusting cavity
End, the lowering valve adjustment bolt are pressed on the lowering valve clamping sleeve.
The beneficial effects of the invention are as follows：Different location is moved in main control valve opening by main control valve, controls oil return valve control
Liquefaction road, to control oil return valve open and close state, while control lowering valve open and close state, realize oil inlet with
The relationship for forming connection between oil cylinder oil inlet mouth or blocking, to realize that control is in using the hydraulic cylinder that the distributor controls
The state promoted, is neutral, declined；Regulating mechanism, lowering valve clamping sleeve and lowering valve adjustment bolt are installed on the right side of lowering valve
Position of the lowering valve in main control valve opening can be adjusted, handle idle stroke is minimum, decline segmentation and promotes segmentation most to reach
More perfect conditions；Main control valve is installed with lowering valve in main control valve opening, and main control valve can be in direct contact with lowering valve,
It improves the decline of hydraulic rockshaft, promote sensitivity, decline up to 300 sections of segmentation, can be reached by promoting segmentation by 200 sections；Liquid
The quiet sedimentation value of pressure lifter ensures mainly by the sealing state of lowering valve and check valve, relatively reliable.Liquid built in the present invention
Press distributor good airproof performance, control sensitive, performance is stablized, and reliability is high, and convenient disassembly is easy to repair.
Based on the above technical solution, the present invention can also be improved as follows.
Further, oil return valve control oil circuit is equipped with oil return valve adjustment hole, the oil return valve adjustment hole with it is described
The back cavity of oil return valve is connected to.
Advantageous effect using above-mentioned further scheme is that oil return valve throttle orifice can buffer the closing velocity of oil return valve,
So that oil return is closed balance, is not to make the too fast of oil return valve closing and lift arm outside lifter is made to shake.
Further, be equipped with oil return valve sealing shroud in the oil return valve opening, the oil return valve sealing shroud be equipped with it is described
The matched valve opening of oil return valve.
Advantageous effect using above-mentioned further scheme is, oil return valve and oil return valve sealing shroud not only increase guiding role and
And oil return valve with oil return valve sealing shroud cooperatively forms certain throttling action oil return valve body may be implemented and steadily opens and closes.
Further, the oil cylinder draining oil circuit, which is equipped with, adjusts valve opening, and regulating valve is equipped in the adjusting valve opening.
Advantageous effect using above-mentioned further scheme is that regulating valve screws in length difference regulating oil in distributor body
The size of cylinder dredge oil amount is to control the decrease speed of farm implements.
Description of the drawings
Fig. 1 is the structural schematic diagram of conventional hydraulic distributor；
Fig. 2 is distributor body structure schematic diagram of the present invention；
Fig. 3 is the faces the B-B sectional view of Fig. 2；
Fig. 4 is the faces the A-A sectional view of Fig. 3；
Fig. 5 is dispenser assembly structural schematic diagram of the present invention；
Fig. 6 is that pressure distributor built in the utility model promotes work status schematic diagram；
Fig. 7 is pressure distributor neutral condition fundamental diagram built in the utility model；
Fig. 8 is that pressure distributor built in the utility model declines work status schematic diagram；
Fig. 9 is partial enlargement schematic diagram at I in Fig. 5；
Figure 10 is lowering valve assembly structure schematic diagram；
Figure 11 is the hydraulic schematic diagram of the present invention.
In figure, 1, distributor body；2, check valve；3, oil return valve sealing shroud；4, main valve protecgulum；5, lowering valve；5-1, under
Spool drops；5-2, decline valve seat；6, lowering valve clamping sleeve；7, lowering valve adjustment bolt；8, main control valve；9, oil return valve；10, single
To valve opening；11, oil return valve opening；12, main control valve opening；13, main control valve pocket；14, lowering valve oil return hole；15, adjusting cavity；16、
Regulating valve；17, hydraulic cylinder；18, oil cylinder safety valve；19, oil pump；20, distributor safety valve；21, oil cylinder block valve；22, liquid
Pressure output；D, oil cylinder oil inlet mouth；E, oil return opening；F, oil inlet；G, hydraulic pressure delivery outlet；T, valve opening is adjusted；J, oil return valve adjustment hole；
H, oil return valve controls oil circuit；X, oil cylinder draining oil circuit.
Specific implementation mode
Principles and features of the present invention are described below in conjunction with example, the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the present invention.
As shown in figs. 2-11, a kind of built-in pressure distributor, including distributor body 1, the right side of the distributor body 1
Equipped with main valve protecgulum 4, the distributor body is internally provided with main control valve 8, oil return valve 9, check valve 2；The distributor body
It is equipped with oil inlet F, oil cylinder oil inlet mouth D, oil return opening E；The main control valve is mounted in main control valve opening 12, the oil return valve
In oil return valve opening 11, the check valve is mounted in unidirectional valve opening 10, the main control valve opening and the oil return valve opening
Between oil circuit H connection controlled by oil return valve, pass through oil cylinder draining oil circuit X between the main control valve opening and the unidirectional valve opening
Connection, the oil suction chamber of the oil return valve are connected with the oil inlet, and the draining chamber of the oil return valve is connected with the oil return opening
Logical, the oil suction chamber of the check valve is connected with the oil inlet, the oil outlet chamber of the check valve and the oil cylinder oil inlet mouth phase
Connection；Lowering valve 5 is additionally provided in the main control valve opening, the lowering valve is arranged in the right side of the main control valve, the oil
Cylinder oil inlet is connected by the oil cylinder draining oil circuit with the oil suction chamber of the lowering valve, the oil outlet chamber of the lowering valve and institute
Oil return opening is stated to be connected；The lowering valve includes declining spool 5-1 and declining valve seat 5-2, and the lowering valve cover for seat is mounted in described
In main control valve opening, the right side of the lowering valve is equipped with regulating mechanism, and the regulating mechanism includes lowering valve clamping sleeve 6 and declines
Valve adjustment bolt 7, the main valve protecgulum 4 is equipped with adjusting cavity at the correspondence main control valve opening, on the lowering valve clamping sleeve 6
Equipped with lowering valve oil return hole, the lowering valve clamping sleeve 6 is arranged in the adjusting cavity, and the lowering valve clamping sleeve 6 is in bell jar
Shape, open end are pressed on the decline valve seat 5-2, and the lowering valve adjustment bolt 7 is arranged in the end of the adjusting cavity,
The lowering valve adjustment bolt 7 is pressed on the lowering valve clamping sleeve 6.
The hydraulic pressure delivery outlet G for the external other hydraulic circuits of user is additionally provided on the pressure distributor shell.At this
The hydraulic pressure delivery outlet that hydraulic pressure exports in invention is closed.
The open end of lowering valve clamping sleeve 6, which abuts against, to be declined on valve seat, declines valve seat in main control valve opening for adjusting
Position, lowering valve adjustment bolt 7 is held out against in the end face of main valve protecgulum 4, for fixing lowering valve clamping sleeve 6 and adjustment lowering valve
The position of clamping sleeve 6.
The oil return valve control oil circuit is equipped with oil return valve adjustment hole J, and the oil return valve adjustment hole leads to the oil return valve
Back cavity.Oil return valve adjustment hole J is used for buffering the speed of oil return valve closing, is not to make the too fast of oil return valve closing and make promotion
The outer lift arm of device is shaken.
Oil return valve sealing shroud 3 is equipped in the oil return valve opening, the oil return valve sealing shroud is equipped with and the oil return valve phase
The valve opening of cooperation.Oil return valve not only increases guiding role with oil return valve sealing shroud but also oil return valve coordinates shape with oil return valve sealing shroud
Oil return valve body may be implemented at certain throttling action steadily to open and close.
The oil cylinder draining oil circuit, which is equipped with to adjust, is equipped with regulating valve 16 in valve opening T, the adjusting valve opening T.Regulating valve is revolved
Enter the size of length difference regulating oil cylinder dredge oil amount in distributor body to control the decrease speed of farm implements.
The oil circuit control operation principle of pressure distributor of the present invention is as follows：
When promoting state as shown in Figure 6, main control valve moves left-most position, and oil return valve controls oil circuit H and oil inlet F phases
Logical, the high pressure oil come from oil pump enters the back cavity of oil return valve 9, oil return valve and oil return valve under hydraulic fluid pressure and spring-force driven dual
Sealing shroud coordinates oil return valve 9 to close, while because main control valve 8 and lowering valve 5 are not in contact with lowering valve 5 is closed, oil pump
High pressure oil opens check valve 2 and enters hydraulic cylinder by oil cylinder oil inlet mouth D, and oil cylinder piston, which moves up, realizes that farm implements are promoted.
When neutral condition as shown in Figure 7, main control valve 8 moves right closing oil return valve control oil circuit H, and when state declines
Valve 5 is not opened yet, and oil return valve 9 is opened under the effect of oil pump high pressure oil, and oil pump high pressure oil passes through oil return by oil return valve sealing shroud 3
Mouth directly flows back to fuel tank.
When declining state as shown in Figure 8, main control valve 8 continues the closing oil return valve control oil circuit H that moves right, while master control
Valve 8 processed pushes decline spool to move right, and lowering valve 5 is opened under the effect of main control valve 8, and lowering valve 5 as shown in Figure 9 is opened,
In oil pump high pressure oil pressure, fuel tap 9 is opened next time, and oil pump high pressure oil directly flows back to oil by oil return valve sealing shroud 3 by oil return opening
Case opens hydraulic oil in hydraulic cylinder because of lowering valve 5 and passes through oil return by oil cylinder oil inlet mouth D, oil cylinder draining oil circuit X, lowering valve 5
Mouth flows back to fuel tank.
The small flow pressure distributor of the present invention can be widely applied to big-and-middle horsepower tractor hydraulic pressure suspension arrangement.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (4)
1. the right side of a kind of built-in pressure distributor, including distributor body, the distributor body is equipped with main valve protecgulum, described
Distributor body is internally provided with main control valve, oil return valve, check valve, and the distributor body is equipped with oil inlet, oil cylinder oil inlet
Mouth, oil return opening, the main control valve are mounted in main control valve opening, and the oil return valve is mounted in oil return valve opening, described unidirectional
Valve is mounted in unidirectional valve opening, which is characterized in that is controlled by oil return valve between the main control valve opening and the oil return valve opening
Oil communication, by oil cylinder draining oil communication between the main control valve opening and the unidirectional valve opening, the oil return valve into
Oil pocket is connected with the oil inlet, and the draining chamber of the oil return valve is connected with the oil return opening, the oil inlet of the check valve
Chamber is connected with the oil inlet, and the oil outlet chamber of the check valve is connected with the oil cylinder oil inlet mouth；The main control valve opening
It is inside additionally provided with lowering valve, the lowering valve is arranged on the right side of the main control valve, and the oil cylinder oil inlet mouth passes through the oil cylinder
Draining oil circuit is connected with the oil suction chamber of the lowering valve, and the oil outlet chamber of the lowering valve is connected with the oil return opening；It is described
Lowering valve includes declining spool and declining valve seat, and the lowering valve cover for seat is mounted in the main control valve opening, the lowering valve
Right side is equipped with regulating mechanism, and the regulating mechanism includes lowering valve clamping sleeve and lowering valve adjustment bolt, and the main valve protecgulum exists
Adjusting cavity is equipped at the corresponding main control valve opening, the lowering valve clamping sleeve is equipped with lowering valve oil return hole, the lowering valve
Compression is set in the adjusting cavity, and the lowering valve clamping sleeve is in bell shape, and open end is pressed on the decline valve seat
On, the lowering valve adjustment bolt is arranged in the end of the adjusting cavity, and the lowering valve adjustment bolt is pressed on the decline
On valve clamping sleeve, the main control valve moves different location in main control valve opening, and control oil return valve controls oil circuit, to control back
Fuel tap opens and closes, and the main control valve, which moves right, can push decline spool to move to right to open lowering valve.
2. built-in pressure distributor according to claim 1, which is characterized in that the oil return valve control oil circuit is equipped with back
Fuel tap adjustment hole, the oil return valve adjustment hole are connected to the back cavity of the oil return valve.
3. built-in pressure distributor according to claim 1, which is characterized in that it is close to be equipped with oil return valve in the oil return valve opening
Big envelope, the oil return valve sealing shroud are equipped with and the matched valve opening of the oil return valve.
4. built-in pressure distributor according to claim 1, which is characterized in that the oil cylinder draining oil circuit, which is equipped with, to be adjusted
Valve opening, the adjusting valve opening is interior to be equipped with regulating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610566333.XA CN106015146B (en) | 2016-07-18 | 2016-07-18 | A kind of built-in pressure distributor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610566333.XA CN106015146B (en) | 2016-07-18 | 2016-07-18 | A kind of built-in pressure distributor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106015146A CN106015146A (en) | 2016-10-12 |
| CN106015146B true CN106015146B (en) | 2018-09-25 |
Family
ID=57119684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610566333.XA Active CN106015146B (en) | 2016-07-18 | 2016-07-18 | A kind of built-in pressure distributor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106015146B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762906B (en) * | 2016-12-27 | 2018-03-30 | 恒天九五重工有限公司 | A kind of hydraulic crawler excavator main pump power aux. control valve |
| TR201708846A2 (en) * | 2017-06-15 | 2017-09-21 | Hema Enduestri Anonim Sirketi | A CONTROL VALVE FOR HYDRAULIC LIFTS |
| CN107956757A (en) * | 2017-12-08 | 2018-04-24 | 山东弘宇农机股份有限公司 | A kind of multifunctional assembled hydraulic control valve |
| CN111963508B (en) * | 2020-09-22 | 2025-01-24 | 潍坊力创电子科技有限公司 | Intelligent control system of hydraulic suspension device |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2810375A1 (en) * | 1978-03-10 | 1979-09-20 | Bosch Gmbh Robert | CONTROL DEVICE FOR HYDRAULIC POWER TRANSFER |
| IT1292919B1 (en) * | 1997-05-13 | 1999-02-11 | Mita Oleodinamica Spa | DISTRIBUTOR FOR A CONTROLLED POSITION AND EFFORT HYDRAULIC LIFT FOR TRACTORS AND AGRICULTURAL MACHINES. |
| CN200940613Y (en) * | 2006-03-31 | 2007-08-29 | 洛阳拖拉机研究所有限公司 | Tractor hydraulic distributor |
| CN201180809Y (en) * | 2008-04-03 | 2009-01-14 | 于晓卿 | Large-horsepower distributer spill valve |
| CN201650909U (en) * | 2010-03-25 | 2010-11-24 | 浙江工业大学 | High horsepower tractor hydraulic distributor |
| CN202203200U (en) * | 2011-08-26 | 2012-04-25 | 山东弘宇机械有限公司 | Hydraulic distributor descending valve |
| CN202209327U (en) * | 2011-08-26 | 2012-05-02 | 山东弘宇机械有限公司 | Connection mode of hydraulic distributor |
| CN202203201U (en) * | 2011-08-26 | 2012-04-25 | 山东弘宇机械有限公司 | Hydraulic distributor |
| CN203906428U (en) * | 2014-06-13 | 2014-10-29 | 山东弘宇农机股份有限公司 | Integral-type hydraulic distributor of new structure |
| CN205858823U (en) * | 2016-07-18 | 2017-01-04 | 山东弘宇农机股份有限公司 | A kind of built-in pressure distributor |
-
2016
- 2016-07-18 CN CN201610566333.XA patent/CN106015146B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106015146A (en) | 2016-10-12 |
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