CN107956757A - A kind of multifunctional assembled hydraulic control valve - Google Patents
A kind of multifunctional assembled hydraulic control valve Download PDFInfo
- Publication number
- CN107956757A CN107956757A CN201711295118.1A CN201711295118A CN107956757A CN 107956757 A CN107956757 A CN 107956757A CN 201711295118 A CN201711295118 A CN 201711295118A CN 107956757 A CN107956757 A CN 107956757A
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- China
- Prior art keywords
- valve
- spring
- control valve
- hydraulic control
- multifunctional assembled
- 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.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 27
- 239000010959 steel Substances 0.000 claims description 27
- 230000007423 decrease Effects 0.000 claims description 11
- 230000007246 mechanism Effects 0.000 claims description 6
- 230000033228 biological regulation Effects 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 2
- 239000000446 fuel Substances 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 8
- 230000006872 improvement Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000002528 anti-freeze Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000916 dilatatory effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009313 farming Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000000725 suspension Substances 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
-
- 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
- F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Check Valves (AREA)
Abstract
The invention discloses a kind of multifunctional assembled hydraulic control valve, including a piece of lifter control valve（1）And two panels hydraulic pressure delivery valve（2）, the hydraulic control valve described in two panels（2）Parallel connection, then with the lifter control valve（1）Series connection, the lifter control valve（1）It is connected with horizontally disposed lowering valve（3）And check valve（4）, the lowering valve（3）With check valve（4）Parallel connection, the lifter control valve（1）It is also associated with safety valve（5）, the safety valve（5）Side is equipped with oil inlet（6）.Compared with prior art, multifunctional assembled hydraulic control valve of the invention, the fuel feeding by the way of connection in series-parallel combination, is not limited by a space, and fuel delivery is sufficient, and lifting speed is fast, will not card valve.
Description
Technical field
The invention belongs to hydraulic system technical field, more particularly to a kind of multifunctional assembled hydraulic control valve.
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.Pressure distributor is the core component of hydraulic control system, it, which is acted on, is responsible for the above-mentioned function of control lifter completion,
Its performance has whole tractor hydraulic suspension arrangement performance directly great influence.
In recent years, tractor manufacture, development progress are accelerated, Development Trend tendency high-power, high-performance.Traditional hydraulic separate
Orchestration has the following disadvantages：It is relatively simple for structure, the failures such as poorly sealed, card valve are be easy to cause, the accuracy of manufacture requires tighter, dimension
Repair of high cost, with the lifting of dilatory acc power, be easy to cause lifting for the failure such as shortage of oil, lifting speed is slow.Traditional liquid
The technical performance of pressure distributor has been difficult in adapt to current development trend.
Big-powered tractor is equipped with a few road hydraulic pressure delivery valves, is limited by space, and the installation site of delivery valve is not fixed enough,
Pipeline connection length, performance and stability is not high.
The content of the invention
This purpose is to provide in view of the deficiencies of the prior art, there is provided a kind of multifunctional assembled hydraulic control valve, solves
Existing hydraulic control valve, it is relatively simple for structure, be easy to cause the failures such as poorly sealed, card valve, the accuracy of manufacture require it is tighter,
Maintenance cost is high, with the lifting of dilatory acc power, lifting is be easy to cause for the failure such as shortage of oil, lifting speed is slow, by space
The problem of limitation, the installation site of delivery valve is not fixed enough, pipeline connection length, performance and stability is not high, and winter easily freezes,
The combined type hydraulic control valve is compact-sized, good airproof performance, performance are stable, reliability is high, flow efficiency is high, antifreeze, just
In maintenance, it can realize the multifunctional assembled hydraulic control valve of requirement, the fuel feeding by the way of connection in series-parallel combination, from sky
Between limit, fuel delivery is sufficient, and lifting speed is fast, will not card valve.
In order to achieve the above object, the technical solution adopted by the present invention there is provided a kind of multifunctional assembled hydraulic control
Valve, including a piece of lifter control valve and two panels hydraulic pressure delivery valve, hydraulic control valve described in two panels is in parallel, then with it is described
Lifter control valve is connected, and the lifter control valve is connected with horizontally disposed lowering valve and check valve, the lowering valve
In parallel with check valve, the lifter control valve is also associated with safety valve, and the safety valve side is equipped with oil inlet.
One kind as this programme is improved, and the lifter control valve includes Scotch yoke, connects above the Scotch yoke
Hand lever is connected to, side is connected with the lowering valve.
Another kind as this programme improves, and the Scotch yoke includes guiding valve and guide rod, between the guiding valve and guide rod
It is additionally provided with telescoping mechanism.
Further as this programme is improved, and the telescoping mechanism includes the first steel ball and liter being installed in the guiding valve
Pressure valve, described back-up valve one end coordinates with the first steel ball to be contacted, and the other end is connected with the first spring base, and first spring base leads to
Cross locating piece to be connected with guiding valve, first spring base is connected with the first spring, one end and the first spring of first spring
Seat connection, the other end are connected with second spring seat, and the second spring seat is connected by locked spacer with the guide rod, the cunning
Valve outer ring is equipped with positioning sleeve, and the positioning sleeve both sides are respectively equipped with a pair of 3rd spring base and a pair of 4th spring base, and described the
The 3rd spring and the 4th spring are respectively equipped between three spring bases and the 4th spring base.
As the further improvement of this programme, pressure regulation screw plug is equipped with the guide rod.
As the further improvement of this programme, the two panels hydraulic control valve is connected by three-position valve body assembly, described
Three-position valve body assembly includes housing and three-position valve bar, and the housing is equipped with baffle, and the three-position valve bar passes through the housing and gear
Plate is simultaneously fixed by baffle, and the three-position valve boom end is equipped with a pair of 5th spring base, and described two 5th spring bases pass through cunning
Valve screw is fixed to the end of the three-position valve bar, and the 5th spring is equipped between the 5th spring base, and outside is equipped with spring cup；
Be equipped with the 6th spring base above the housing, be equipped with the 6th spring below the 6th spring base, the 6th spring and unidirectionally
Valve body connects.
As the further improvement of this programme, the lowering valve includes lowering valve plug screw and declines valve seat, the decline
It is equipped with valve plug screw and declines valve spring, the decline valve spring is connected with the second steel ball, second steel ball and the lowering valve
Seat is connected, and is equipped with push rod in the decline valve seat, the push rod is connected with second steel ball.
As the further improvement of this programme, the check valve includes check valve plug screw and one-way valve seat, described unidirectional
One-way valve spring is equipped with valve plug screw, the one-way valve spring is connected with the 3rd steel ball, the 3rd steel ball and the check valve
Seat is connected.
As the further improvement of this programme, the safety valve includes nut, swivel nut and safe valve pocket, is sequentially connected,
Seal washer is equipped between the nut and swivel nut, the 4th steel ball, the 7th spring base and the 7th spring are equipped with the swivel nut,
Be equipped with safe spool in the safe valve pocket, the 7th spring one end stretch into swivel nut successively with the 7th spring base, the 4th steel ball
Connection, the other end are stretched into safe valve pocket and are connected with safe spool.
As the further improvement of this programme, each valve body junction is equipped with O-ring seals.
Compared with prior art, multifunctional assembled hydraulic control valve of the invention, is supplied by the way of connection in series-parallel combination
Oil, is not limited by a space, and fuel delivery is sufficient, and lifting speed is fast, will not card valve.
Brief description of the drawings
Fig. 1 is the structure diagram of the multifunctional assembled hydraulic control valve of the present invention.
Fig. 2 is the assembling schematic diagram of the multifunctional assembled hydraulic control valve of the present invention.
Fig. 3 is the sectional view of the lifter control valve of the present invention.
Fig. 4 is the structure diagram of Scotch yoke in lifter control valve of the invention.
Fig. 5 is the three-position valve body assembly structure schematic diagram of the multifunctional assembled hydraulic control valve of the present invention.
Fig. 6 is the structure diagram of the lowering valve of the multifunctional assembled hydraulic control valve of the present invention.
Fig. 7 is the structure diagram of the check valve of the multifunctional assembled hydraulic control valve of the present invention.
Fig. 8 is the structure diagram of the safety valve of the multifunctional assembled hydraulic control valve of the present invention.
Fig. 9 is the assembling schematic diagram of lowering valve and check valve in the present invention.
Embodiment
The embodiment of the present invention is described in detail come further below by the form with reference to attached drawing,
But what following embodiments were only enumerated is more preferably embodiment, it only plays the role of explanation to help to understand the present invention,
It can not be not understood as limitation of the invention.
The embodiment of the present invention is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or has the function of same or like element.
The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to for explaining the present invention, without being understood that
For limitation of the present invention.
In the description of the present invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise " are based on orientation shown in the drawings or position relationship, are for only for ease of
Description is of the invention to be described with simplified, rather than the device or element of instruction or hint meaning must be with specific orientation, Yi Te
Fixed azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include one or more this feature.In the description of the present invention, unless otherwise indicated, " multiple " are meant that two
A or two or more, unless otherwise restricted clearly.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation "
It should be interpreted broadly Deng term, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can be
Mechanically connect or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, can be two
Connection inside element.For the ordinary skill in the art, above-mentioned term can be understood at this as the case may be
Concrete meaning in invention.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or it " under "
Can directly it be contacted including the first and second features, it is not directly to contact but pass through it that can also include the first and second features
Between other characterisation contact.Moreover, fisrt feature second feature " on ", " top " and " above " to include first special
Sign is directly over second feature and oblique upper, or is merely representative of fisrt feature level height and is higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " fisrt feature that includes are immediately below second feature and obliquely downward, or be merely representative of
Fisrt feature level height is less than second feature.
Embodiment one：Such as Fig. 1, shown in 2,9, a kind of multifunctional assembled hydraulic control valve, including a piece of lifter control
Valve 1 and two panels hydraulic pressure delivery valve 2, the hydraulic control valve 2 described in two panels is in parallel, then connects with the lifter control valve 1,
The lifter control valve 1 is connected with horizontally disposed lowering valve 3 and check valve 4, and the lowering valve 3 is in parallel with check valve 4,
The lifter control valve 1 is also associated with safety valve 5, and 5 side of safety valve is equipped with oil inlet 6.
Shown in Fig. 3, the lifter control valve 1 includes Scotch yoke 7, and the top of Scotch yoke 7 is connected with hand lever 8,
Side is connected with the lowering valve 3.
Shown in Fig. 3, the Scotch yoke 7 includes guiding valve 9 and guide rod 10, is additionally provided with and stretches between the guiding valve 9 and guide rod 10
Contracting mechanism.
Shown in Fig. 4, the telescoping mechanism includes the first steel ball 11 and back-up valve 12 being installed in the guiding valve 9, described
12 one end of back-up valve coordinates with first steel ball 11 to be contacted, and the other end is connected with the first spring base 13, first spring base
13 are connected by locating piece 42 with guiding valve 9, and first spring base 13 is connected with the first spring 14, and the one of first spring 14
End is connected with the first spring base 13, and the other end is connected with second spring seat 15, and the second spring seat 15 passes through locked spacer 16
It is connected with the guide rod 10,9 outer ring of guiding valve is equipped with positioning sleeve 17, and 17 both sides of positioning sleeve are respectively equipped with a pair of 3rd bullet
Spring abutment 18 and a pair of 4th spring base 19, the 3rd spring 20 is respectively equipped between the 3rd spring base 18 and the 4th spring base 19
With the 4th spring 21.
Shown in Fig. 4, pressure regulation screw plug 22 is equipped with the guide rod 10.
Shown in Fig. 5, the two panels hydraulic control valve 2 is connected by three-position valve body assembly, and the three-position valve body assembly includes
Housing 23 and three-position valve bar 24, the housing 23 are equipped with baffle 25, and the three-position valve bar 24 passes through the housing 23 and baffle 25
And fixed by baffle 25,24 end of three-position valve bar is equipped with a pair of 5th spring base 26, described two 5th spring bases 26
The end of the three-position valve bar 24 is fixed to by guiding valve screw 27, the 5th spring 28 is equipped between the 5th spring base 26,
Outside is equipped with spring cup 29；The top of housing 23 is equipped with the 6th spring base 30, and the lower section of the 6th spring base 30 is equipped with the 6th
Spring 31, the 6th spring 31 are connected with check valve body 32.
Shown in Fig. 6, the lowering valve 3 includes lowering valve plug screw 33 and declines valve seat 34, is set in the lowering valve plug screw 33
Have and decline valve spring 35, the decline valve spring 35 is connected with the second steel ball 36, second steel ball 36 and the decline valve seat
34 are connected, and are equipped with push rod 37 in the decline valve seat 34, the push rod 37 is connected with second steel ball 36.
Shown in Fig. 7, the check valve 4 includes check valve plug screw 38 and one-way valve seat 39, is set in the check valve plug screw 38
There is one-way valve spring 40, the one-way valve spring 40 is connected with the 3rd steel ball 41, the 3rd steel ball 41 and the one-way valve seat
39 are connected.
Shown in Fig. 8, the safety valve 5 includes nut 42, swivel nut 43 and safe valve pocket 44, is sequentially connected, the nut 42
Seal washer 45 is equipped between swivel nut 43, the 4th steel ball 46, the 7th spring base 47 and the 7th bullet are equipped with the swivel nut 43
Spring 48, is equipped with safe spool 49 in the safe valve pocket 44, described 7th spring, 48 one end stretch into swivel nut 43 successively with the 7th bullet
Spring abutment 47, the 4th steel ball 46 connect, and the other end is stretched into safe valve pocket 44 and is connected with safe spool 49.
Each valve body junction is equipped with O-ring seals.
The combined type hydraulic control valve is compact-sized, good airproof performance, performance are stable, reliability is high, flow efficiency is high,
Multifunctional assembled hydraulic control valve that is antifreeze, easy to repair, can realizing requirement, is supplied by the way of connection in series-parallel combination
Oil, is not limited by a space, and fuel delivery is sufficient, and lifting speed is fast, will not card valve.
Although the embodiment of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, those of ordinary skill in the art are not departing from the principle of the present invention and objective
In the case of above-described embodiment can be changed within the scope of the invention, change, replace and modification, it is carried out simply
Combination change be all classified as the present invention protection within.
Claims (10)
- A kind of 1. multifunctional assembled hydraulic control valve, it is characterised in that：Including a piece of lifter control valve（1）And two panels liquid Press delivery valve（2）, the hydraulic control valve described in two panels（2）Parallel connection, then with the lifter control valve（1）Series connection, it is described to carry Rise device control valve（1）It is connected with horizontally disposed lowering valve（3）And check valve（4）, the lowering valve（3）With check valve（4） Parallel connection, the lifter control valve（1）It is also associated with safety valve（5）, the safety valve（5）Side is equipped with oil inlet（6）.
- 2. multifunctional assembled hydraulic control valve according to claim 1, it is characterised in that：The lifter control valve （1）Including Scotch yoke（7）, the Scotch yoke（7）Top is connected with hand lever（8）, side and the lowering valve（3）Connection.
- 3. multifunctional assembled hydraulic control valve according to claim 2, it is characterised in that：The Scotch yoke（7）Bag Include guiding valve（9）And guide rod（10）, the guiding valve（9）With guide rod（10）Between be additionally provided with telescoping mechanism.
- 4. multifunctional assembled hydraulic control valve according to claim 3, it is characterised in that：The telescoping mechanism includes peace Mounted in the guiding valve（9）The first interior steel ball（11）And back-up valve（12）, the back-up valve（12）One end and first steel ball （11）Coordinate contact, the other end is connected with the first spring base（13）, first spring base（13）Pass through locating piece（42）With cunning Valve（9）Connection, first spring base（13）It is connected with the first spring（14）, first spring（14）One end and the first bullet Spring abutment（13）Connection, the other end are connected with second spring seat（15）, the second spring seat（15）Pass through locked spacer（16）With The guide rod（10）Connection, the guiding valve（9）Outer ring is equipped with positioning sleeve（17）, the positioning sleeve（17）Both sides are respectively equipped with a pair 3rd spring base（18）With a pair of 4th spring base（19）, the 3rd spring base（18）With the 4th spring base（19）Between respectively Equipped with the 3rd spring（20）With the 4th spring（21）.
- 5. the multifunctional assembled hydraulic control valve according to claim 3 or 4, it is characterised in that：The guide rod（10）It is interior Equipped with pressure regulation screw plug（22）.
- 6. multifunctional assembled hydraulic control valve according to claim 1, it is characterised in that：The two panels hydraulic control valve （2）Connected by three-position valve body assembly, the three-position valve body assembly includes housing（23）With three-position valve bar（24）, the housing （23）Equipped with baffle（25）, the three-position valve bar（24）Through the housing（23）And baffle（25）And pass through baffle（25）Gu It is fixed, the three-position valve bar（24）End is equipped with a pair of 5th spring base（26）, described two 5th spring bases（26）Pass through guiding valve Screw（27）Fixed to the three-position valve bar（24）End, the 5th spring base（26）Between be equipped with the 5th spring（28）, Outside is equipped with spring cup（29）；The housing（23）Top is equipped with the 6th spring base（30）, the 6th spring base（30）Lower section Equipped with the 6th spring（31）, the 6th spring（31）With check valve body（32）Connection.
- 7. multifunctional assembled hydraulic control valve according to claim 1, it is characterised in that：The lowering valve（3）Including Lowering valve plug screw（33）With decline valve seat（34）, the lowering valve plug screw（33）Interior be equipped with declines valve spring（35）, the decline Valve spring（35）It is connected with the second steel ball（36）, second steel ball（36）With the decline valve seat（34）It is connected, it is described Decline valve seat（34）It is interior to be equipped with push rod（37）, the push rod（37）With second steel ball（36）Connection.
- 8. multifunctional assembled hydraulic control valve according to claim 1, it is characterised in that：The check valve（4）Including Check valve plug screw（38）And one-way valve seat（39）, the check valve plug screw（38）It is interior to be equipped with one-way valve spring（40）, it is described unidirectional Valve spring（40）It is connected with the 3rd steel ball（41）, the 3rd steel ball（41）With the one-way valve seat（39）It is connected.
- 9. multifunctional assembled hydraulic control valve according to claim 1, it is characterised in that：The safety valve（5）Including Nut（42）, swivel nut（43）With safe valve pocket（44）, it is sequentially connected, the nut（42）With swivel nut（43）Between be equipped with gasket Circle（45）, the swivel nut（43）Inside it is equipped with the 4th steel ball（46）, the 7th spring base（47）And the 7th spring（48）, the safety Valve pocket（44）It is interior to be equipped with safe spool（49）, the 7th spring（48）Swivel nut is stretched into one end（43）Successively with the 7th spring base （47）, the 4th steel ball（46）Connection, the other end stretch into safe valve pocket（44）Interior and safe spool（49）Connection.
- 10. the multifunctional assembled hydraulic control valve according to any one of claim 1-9, it is characterised in that：It is described each Valve body junction is equipped with O-ring seals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711295118.1A CN107956757A (en) | 2017-12-08 | 2017-12-08 | A kind of multifunctional assembled hydraulic control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711295118.1A CN107956757A (en) | 2017-12-08 | 2017-12-08 | A kind of multifunctional assembled hydraulic control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107956757A true CN107956757A (en) | 2018-04-24 |
Family
ID=61958326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711295118.1A Pending CN107956757A (en) | 2017-12-08 | 2017-12-08 | A kind of multifunctional assembled hydraulic control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107956757A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115024036A (en) * | 2022-06-15 | 2022-09-09 | 山东弘宇农机股份有限公司 | External strong-pressure horizontal cylinder lifter for tractor |
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| CN101990797A (en) * | 2010-09-01 | 2011-03-30 | 中国一拖集团有限公司 | Combined hydraulic fluid distributor for tractor |
| CN202203200U (en) * | 2011-08-26 | 2012-04-25 | 山东弘宇机械有限公司 | Lowering valve of hydraulic distributor |
| CN102979773A (en) * | 2012-05-24 | 2013-03-20 | 山东弘宇机械有限公司 | Two-position multiway valve and tractor hydraulic lifting system |
| CN104728204A (en) * | 2015-03-28 | 2015-06-24 | 合肥长源液压股份有限公司 | Distributor for tractor |
| CN204646840U (en) * | 2015-05-20 | 2015-09-16 | 山东弘宇农机股份有限公司 | A kind of high-volume hydraulic distributor |
| CN106015146A (en) * | 2016-07-18 | 2016-10-12 | 山东弘宇农机股份有限公司 | Built-in hydraulic distributor |
| CN106246973A (en) * | 2016-10-12 | 2016-12-21 | 哈尔滨第机械集团有限公司 | A kind of Armored tracklayer constant pressure valve |
| CN206280530U (en) * | 2016-11-23 | 2017-06-27 | 重庆键英液压机电有限公司 | Easily fabricated electromagnetic valve body mechanism |
| CN207830251U (en) * | 2017-12-08 | 2018-09-07 | 山东弘宇农机股份有限公司 | A kind of multifunctional assembled hydraulic control valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115024036A (en) * | 2022-06-15 | 2022-09-09 | 山东弘宇农机股份有限公司 | External strong-pressure horizontal cylinder lifter for tractor |
| CN115024036B (en) * | 2022-06-15 | 2023-08-25 | 山东弘宇农机股份有限公司 | External strong pressure lying cylinder lifter for tractor |
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