CN108999827A - Multi-way valve for hydraulic pressure elevator of tractor - Google Patents
Multi-way valve for hydraulic pressure elevator of tractor Download PDFInfo
- Publication number
- CN108999827A CN108999827A CN201810901916.2A CN201810901916A CN108999827A CN 108999827 A CN108999827 A CN 108999827A CN 201810901916 A CN201810901916 A CN 201810901916A CN 108999827 A CN108999827 A CN 108999827A
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- Prior art keywords
- oil
- valve rod
- hydraulic
- spring
- valve
- Prior art date
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- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 125000006850 spacer group Chemical group 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 8
- 230000007423 decrease Effects 0.000 abstract description 9
- 239000003921 oil Substances 0.000 description 79
- 239000010720 hydraulic oil Substances 0.000 description 10
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004062 sedimentation 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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
- F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
-
- 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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
- F15B2013/0412—Valve members; Fluid interconnections therefor with three positions
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lifting Devices For Agricultural Implements (AREA)
- Check Valves (AREA)
Abstract
The invention discloses a kind of multi-way valve for hydraulic pressure elevator of tractor, including valve body, it is equipped with oil suction chamber, oil duct first, oil duct second, oil outlet chamber first, oil outlet chamber second, oil back chamber first, oil back chamber second and valve rod in valve body, valve rod is closed with valve body and is slidably connected；With annular groove corresponding with oil duct first, oil duct second, oil outlet chamber first, oil outlet chamber second, oil back chamber first and oil back chamber second respectively on valve rod, the operating side of valve rod is connected with handle, booster cavity is additionally provided in valve body, when valve rod slides to oil outlet chamber second direction, oil duct first is connected to oil outlet chamber first, oil duct second is connected to booster cavity, stem internal is provided in the axial direction with hydraulic reset hole, the input end of hydraulic reset hole is connected to booster cavity, the outlet end of hydraulic reset hole is equipped with resetting apparatus towards the not operation end of valve rod, the not operation end of valve rod.The present invention can all have auto-reset function under the decline state and promotion state of agricultural machinery and implement, easy to operate without manually turning back valve rod.
Description
Technical field
The invention belongs to agricultural mechanical field, it is related to the multi-way valve for hydraulic pressure elevator of tractor.
Background technique
The agricultural machinery and implement requirement that tractor is pulled below can be put down or be promoted, this movement passes through hydraulic pressure lift on tractor
Device is realized.Hydraulic rockshaft include by lift arm axis connection outer lift arm together and interior lift arm, be hinged in mention
The piston rod on arm is risen, piston rod is connected on the piston of hydraulic cylinder, and the side of hydraulic cylinder is equipped with multi-way valve, on multi-way valve
Two oil outlets are connected respectively to promotion oil inlet and decline oil inlet on hydraulic cylinder, and the oil inlet on multi-way valve passes through pipeline
It is connect with hydraulic pump, the oil return opening on multi-way valve is connected with fuel reserve tank.
The Chinese patent of Patent No. 201210163927.8 describes two multi-way valves of one kind and tractor hydraulic is promoted
System, the not operation end of valve rod is equipped with automatic reset device, the dress but this automatically resets in two multi-way valves described in file
Set and decontroling after handle removes external force, valve rod will be automatically returned under the action of reset spring in position, agricultural machinery can not promoted
Valve rod is fixed on promotion state when tool, or after valve rod is manually fixed on promotion state, it is also necessary to manually pull hand
Handle resets valve rod, and operation is more inconvenient.
Summary of the invention
The present invention provides a kind of for the more of hydraulic pressure elevator of tractor to solve shortcoming in the prior art
Road valve all has auto-reset function under the decline state and promotion state of agricultural machinery and implement, without manually turning back valve rod, grasps
Facilitate.
The present invention is adopted the technical scheme that solve the above-mentioned problems, is provided a kind of for tractor hydraulic promotion
The multi-way valve of device, including valve body, valve body is interior to be equipped with oil suction chamber, oil duct first, oil duct second, oil outlet chamber first, oil outlet chamber second, oil back chamber
First, oil back chamber second and valve rod, valve rod is closed with valve body and is slidably connected, intersection's installation of oil suction chamber and oil duct first and oil duct second
There is check valve；On valve rod with respectively with oil duct first, oil duct second, oil outlet chamber first, oil outlet chamber second, oil back chamber first and oil back chamber second phase
Corresponding annular groove, the operating side of valve rod are connected with handle, and booster cavity is additionally provided in valve body, and valve rod slides to oil outlet chamber second institute
At direction, oil duct first is connected to oil outlet chamber first, and oil duct second is connected to booster cavity, and stem internal is provided in the axial direction with hydraulic reset
The input end in hole, hydraulic reset hole is connected to booster cavity, the outlet end of hydraulic reset hole towards the not operation end of valve rod, valve rod
Not operation end is equipped with resetting apparatus.
Preferably, the resetting apparatus includes the coaxial interstage sleeve being successively sleeved on outside valve rod, spacer and positioning sleeve, gear
Set, spacer and positioning sleeve are respectively positioned in the lower cover being fixedly connected on valve body, and mounting hole is provided in the axial direction in positioning sleeve, are installed
It is provided with annular positioning groove on hole wall in hole, the first spring base is provided in mounting hole, the threaded one end of the first spring base connects
Connect valve rod not operation end and the first spring base be connected with the outlet end of hydraulic reset hole, be provided in the first spring base according to
The secondary sliding block to offset, mandril, the first steel ball, the first spring and adjusting screw, sliding block and mandril are slidably connected at the first spring
It is circumferentially arranged on the first spring base to have at least two pilot holes in seat, it is equipped in pilot hole and is adapted with annular positioning groove
The second steel ball；Second spring is provided between spacer and the first spring base, one end of second spring passes through the second spring seat of honour
It offsets with positioning sleeve, the other end of second spring is offseted by seat under second spring with interstage sleeve.
Preferably, spacer pin has been disposed radially between the outlet end and sliding block of hydraulic reset hole in the first spring base
Nail.
Preferably, it is sealed respectively by sealing ring between the inner ring and valve rod of interstage sleeve, between the outer ring and valve body of interstage sleeve.
Preferably, it is sealed between sliding block periphery and the first spring base by sealing ring.
Preferably, lower cover end is provided with dustproof cover, is equipped with and uses between the end face of the first spring base and the end face of dustproof cover
In the mobile gap of valve rod commutation.
Preferably, hydraulic lock is installed, hydraulic lock includes hydraulic lock valve seat, hydraulic lock bullet between oil outlet chamber first and oil duct first
Spring, hydraulic lock steel ball, hydraulic lock spool and third spring base, hydraulic lock spring are assemblied in valve body by hydraulic lock valve seat, liquid
One end of pressure lock spring is connect with third spring base, and hydraulic lock steel ball is mounted between hydraulic lock spool and hydraulic lock spring；Valve
It is provided on bar and v-depression, end and the v-depression of hydraulic lock spool offsets.
By adopting the above technical scheme, the invention has the following advantages that
The present invention all has auto-reset function under the decline state and promotion state of agricultural machinery and implement, is thus lifted to end in agricultural machinery and implement
When position, valve rod can be not necessarily under the pressure of setting by automatically reseting under the action of the pressure effect of hydraulic oil and spring
Valve rod is manually turned back, it is easy to operate.Specifically: when sliding to oil outlet chamber first place side by stick control valve rod of the invention
Xiang Shi, the agricultural machinery and implement hung on tractor are begun to decline, after release handle, during valve rod rebounds immediately under the action of second spring
Position, decline stop；When being moved to the second steel ball by stick control valve rod and sticking into annular positioning groove, valve rod is fixed,
The agricultural machinery and implement hung on tractor start to be promoted, and when promoting position to the end, valve rod can make under the effect of the pressure of hydraulic oil
Second steel ball exits in annular positioning groove, automatically reset under the action of second spring in position.
The self-locking property of each oil circuit can be improved in hydraulic lock of the invention, prevents hydraulic oil from revealing, in environment such as severe jolts
Under, it can prevent the agricultural machinery and implement on tractor from uncontrollably from dropping, improving the stability and safety of agricultural machinery and implement suspension, satisfaction is dragged
Requirement of the machine drawing producer to quiet sedimentation meets the needs of tractor transport transfer farm implements.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the structural schematic diagram of valve rod and resetting apparatus in the present invention.
Specific embodiment
As depicted in figs. 1 and 2, the multi-way valve for hydraulic pressure elevator of tractor of the invention includes valve body 1, in valve body 1
Equipped with oil suction chamber 2, oil duct first 3, oil duct second 4, oil outlet chamber first 5, oil outlet chamber second 6, oil back chamber first 7, oil back chamber second 8 and valve rod 9, valve
Bar 9 is closed with valve body 1 and is slidably connected, and oil suction chamber 2 and the intersection of oil duct first 3 and oil duct second 4 are equipped with check valve, check valve
Including one-way valve seat 11, cone valve 12 and one-way valve spring 13, one-way valve spring 13 is assemblied in by one-way valve seat 11
In valve body 1, sealed between one-way valve seat 11 and valve body 1 using sealing ring；On valve rod 9 with respectively with oil duct first 3, oil duct second
4, oil outlet chamber first 5, oil outlet chamber second 6, oil back chamber first 7 and the corresponding annular groove of oil back chamber second 8, the operating side connection of valve rod 9
There is handle, handle is existing conventional equipment, is not showed that in figure, booster cavity 14 is additionally provided in valve body 1, and valve rod 9 is located at middle position
When, oil duct first 3 and oil duct second 4 are in a closed state, and when valve rod 9 slides to oil outlet chamber 6 direction of second, are entered from oil suction chamber 2
High pressure oil check valve is opened, oil duct first 3 is connected to oil outlet chamber first 5, and oil duct second 4 is connected to booster cavity 14,9 inside edge of valve rod
Hydraulic reset hole 15 axially is offered, the input end of hydraulic reset hole 15 is connected to booster cavity 14, the outlet of hydraulic reset hole 15
Towards the not operation end of valve rod 9, the not operation end of valve rod 9 is equipped with resetting apparatus at end.
Resetting apparatus includes the coaxial interstage sleeve 16 being successively sleeved on outside valve rod 9, spacer 17 and positioning sleeve 18, interstage sleeve 16,
Spacer 17 and positioning sleeve 18 are respectively positioned in the lower cover 19 being fixedly connected on valve body 1, between the inner ring and valve rod 9 of interstage sleeve 16, are kept off
It is sealed respectively by sealing ring between the outer ring and valve body 1 of set 16, is provided in the axial direction with mounting hole 20, mounting hole in positioning sleeve 18
It is provided with annular positioning groove 21 on hole wall in 20, is provided with the first spring base 22 in mounting hole 20, the one of the first spring base 22
It holds the not operation end for being threaded in valve rod 9 and the first spring base 22 is connected with the outlet end of hydraulic reset hole 15, the first bullet
The sliding block 23 successively to offset, mandril 24, the first steel ball 25, the first spring 26 are provided in spring abutment 22 from right to left and adjusts screw
27, sliding block 23 and mandril 24 are slidably connected in the first spring base 22, are passed through between 23 periphery of sliding block and the first spring base 22
Sealing ring sealing, can prevent hydraulic oil from reveal from sliding block 23, in the first spring base 22 in the outlet end of hydraulic reset hole 15 and
Position-limitting pin 32 is disposed radially between sliding block 23, anti-limited slip block 23 is skidded off out of first spring base 22 to fall off, the first spring
It is circumferentially arranged on seat 22 to have at least two pilot holes, second steel ball compatible with annular positioning groove 21 is installed in pilot hole
28。
Second spring 29 is provided between spacer 17 and the first spring base 22, one end of second spring 29 passes through second spring
The seat of honour 30 offsets with positioning sleeve 18, and the other end of second spring 29 is offseted by seat 31 under second spring with interstage sleeve 16.
19 end of lower cover is provided with dustproof cover 33, is equipped with and uses between the end face of the first spring base 22 and the end face of dustproof cover 33
It commutates in valve rod 9 mobile gap.Dustproof cover 33 is threaded on lower cover 19, can prevent the impurity such as extraneous dust from entering valve
In body 1.
Hydraulic lock is installed, hydraulic lock includes hydraulic lock valve seat 34, hydraulic lock spring between oil outlet chamber first 5 and oil duct first 3
35, hydraulic lock steel ball 36, hydraulic lock spool 37 and third spring base 38, hydraulic lock spring 35 are assemblied in by hydraulic lock valve seat 34
In valve body 1, one end of hydraulic lock spring 35 is connect with third spring base 38, hydraulic lock steel ball 36 be mounted on hydraulic lock spool 37 with
Between hydraulic lock spring 35；It is provided on valve rod 9 and offsets with v-depression 39, end and the v-depression 39 of hydraulic lock spool 37.
Present invention can apply in the hydraulic rockshaft of tractor, the location status of valve rod 9 is divided into middle position, moves to right and left
It moves:
Under 9 normality of valve rod of the invention be in middle position, when valve rod 9 is in middle position, oil duct first 3, oil duct second 4, oil outlet chamber first 5 and
Oil outlet chamber second 6 is in a closed state；
When being moved to right by stick control valve rod 9, i.e., when valve rod 9 slides to oil outlet chamber 5 direction of first, second spring 29 is pressed
Contracting, the hydraulic oil entered from oil suction chamber 2 open check valve, and oil duct first 3 and oil outlet chamber first 5 be in closed state, oil duct second 4 and
Oil outlet chamber second 6 is connected to, and the agricultural machinery and implement hung on tractor are begun to decline, once release handle at this time, valve rod 9 is in second spring 29
Under the action of rebound immediately middle position, decline stops.
When being moved to left by stick control valve rod 9, i.e., when valve rod 9 slides to oil outlet chamber 6 direction of second, 29 quilt of second spring
Compression, the hydraulic oil entered from oil suction chamber 2 open check valve, and oil duct first 3 is connected to oil outlet chamber first 5, oil duct second 4 and booster cavity
14 connections (obviously feel that handle is positioned) when valve rod 9 is moved to left side extreme position, i.e. it is fixed that the second steel ball 28 sticks into annular
In the slot 21 of position, it be detached from it can not out of annular positioning groove 21 at this point, the first steel ball 25 oppresses the second steel ball 28, valve rod 9 is consolidated
Determine in the position, the agricultural machinery and implement hung on tractor start to be promoted, and when promoting position to the end, valve rod 9 can be automatically reset to
Middle position, the reseting procedure specifically: from oil suction chamber 2 enter hydraulic oil by oil duct first 3 enter oil outlet chamber first 5 while,
Also lead to the hydraulic reset hole 15 inside booster cavity 14 and valve rod 9 from oil duct second 4, due to the hydraulic oil of the direction not formed time
Road, the hydraulic oil pressure in hydraulic reset hole 15 gradually rise, (can be by turning adjusting spiral shell when oil pressure rises to setting pressure P
Nail 27 adjusts the compression degree of the first spring 26, so as to adjust setting pressure P), sliding block can be passed sequentially through under pressure
23 and mandril 24 push the first steel ball 25, so that the first steel ball 25 is no longer oppressed the second steel ball 28, the second steel ball 28 is from circular orientation
Exited in slot 21, valve rod 9 reset under the action of second spring 29 in position.
The outlet of oil outlet chamber first 5 is denoted as load end A, when valve rod 9 moves to right, valve rod 9 up opens hydraulic lock spool 37
Third spring base 38 makes actuator port release, realizes that load end A's is self-locking；When valve rod 9 moves to left, hydraulic oil by oil duct first 3 into
Enter oil outlet chamber first 5, when valve rod 9 returns to middle position from the state, hydraulic lock is self-locking, prevents the hydraulic fluid pressure in oil outlet chamber first 5
Decline guarantees the stability of the agricultural machinery and implement suspension status on tractor.
The present embodiment not makes any form of restriction shape of the invention, material, structure etc., all according to this hair
Bright technical spirit any simple modification, equivalent change and modification to the above embodiments, belong to the technology of the present invention side
The protection scope of case.
Claims (7)
1. being used for the multi-way valve of hydraulic pressure elevator of tractor, including valve body, it is equipped with oil suction chamber in valve body, oil duct first, oil duct second, goes out
Oil pocket first, oil outlet chamber second, oil back chamber first, oil back chamber second and valve rod, valve rod is closed with valve body and is slidably connected, oil suction chamber and oil duct
The intersection of first and oil duct second is equipped with check valve；On valve rod with respectively with oil duct first, oil duct second, oil outlet chamber first, oil outlet chamber
Second, oil back chamber first and the corresponding annular groove of oil back chamber second, the operating side of valve rod are connected with handle, it is characterised in that: valve body
It is inside additionally provided with booster cavity, when valve rod slides to oil outlet chamber second direction, oil duct first is connected to oil outlet chamber first, oil duct second and pressurization
Chamber connection, stem internal are provided in the axial direction with hydraulic reset hole, and the input end of hydraulic reset hole is connected to booster cavity, hydraulic reset
The outlet end in hole is equipped with resetting apparatus towards the not operation end of valve rod, the not operation end of valve rod.
2. the multi-way valve according to claim 1 for hydraulic pressure elevator of tractor, it is characterised in that: the resetting apparatus
Including the coaxial interstage sleeve being successively sleeved on outside valve rod, spacer and positioning sleeve, interstage sleeve, spacer are respectively positioned on positioning sleeve and are fixedly connected
In lower cover on valve body, it is provided in the axial direction with mounting hole in positioning sleeve, is provided with annular positioning groove on the hole wall in mounting hole,
The first spring base is provided in mounting hole, the threaded one end of the first spring base is connected to the not operation end of valve rod and the first spring base
It is connected with the outlet end of hydraulic reset hole, the sliding block successively to offset, mandril, the first steel ball, is provided in the first spring base
One spring and adjusting screw, sliding block and mandril are slidably connected in the first spring base, circumferentially arranged on the first spring base to have
At least two pilot holes are equipped with the second steel ball compatible with annular positioning groove in pilot hole；
Second spring is provided between spacer and the first spring base, one end of second spring passes through the second spring seat of honour and positioning sleeve
It offsets, the other end of second spring is offseted by seat under second spring with interstage sleeve.
3. the multi-way valve according to claim 2 for hydraulic pressure elevator of tractor, it is characterised in that: in the first spring base
Position-limitting pin has been disposed radially between the outlet end and sliding block of hydraulic reset hole.
4. the multi-way valve according to claim 2 for hydraulic pressure elevator of tractor, it is characterised in that: the inner ring of interstage sleeve with
It is sealed respectively by sealing ring between valve rod, between the outer ring and valve body of interstage sleeve.
5. the multi-way valve according to claim 2 for hydraulic pressure elevator of tractor, it is characterised in that: sliding block periphery and the
It is sealed between one spring base by sealing ring.
6. the multi-way valve according to claim 2 for hydraulic pressure elevator of tractor, it is characterised in that: the setting of lower cover end
There is dustproof cover, the gap mobile for valve rod commutation is equipped between the end face of the first spring base and the end face of dustproof cover.
7. the multi-way valve according to any one of claim 1 to 6 for hydraulic pressure elevator of tractor, it is characterised in that:
Hydraulic lock is installed between oil outlet chamber first and oil duct first, hydraulic lock include hydraulic lock valve seat, hydraulic lock spring, hydraulic lock steel ball,
Hydraulic lock spool and third spring base, hydraulic lock spring are assemblied in valve body by hydraulic lock valve seat, one end of hydraulic lock spring
It is connect with third spring base, hydraulic lock steel ball is mounted between hydraulic lock spool and hydraulic lock spring；It is provided on valve rod and V-arrangement
Groove, end and the v-depression of hydraulic lock spool offset.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810901916.2A CN108999827B (en) | 2018-08-09 | 2018-08-09 | Multi-way valve for hydraulic lifter of tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810901916.2A CN108999827B (en) | 2018-08-09 | 2018-08-09 | Multi-way valve for hydraulic lifter of tractor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108999827A true CN108999827A (en) | 2018-12-14 |
| CN108999827B CN108999827B (en) | 2024-09-20 |
Family
ID=64594287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810901916.2A Active CN108999827B (en) | 2018-08-09 | 2018-08-09 | Multi-way valve for hydraulic lifter of tractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108999827B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109707888A (en) * | 2019-02-19 | 2019-05-03 | 新乡市德恩智能工业有限公司 | A kind of hydraulic trigger-type automatic reset mechanism |
| CN109779997A (en) * | 2019-02-19 | 2019-05-21 | 新乡市德恩智能工业有限公司 | A kind of hydraulic trigger-type automatically resets hydraulic valve |
| CN111156216A (en) * | 2020-01-21 | 2020-05-15 | 日照海卓液压有限公司 | Multi-way valve with integral mechanical pilot check valve and electro-hydraulic proportional control |
| CN111894923A (en) * | 2020-05-22 | 2020-11-06 | 宁波江北宇洲液压设备厂 | Tractor multi-way valve with automatic position jumping function |
| CN112963579A (en) * | 2021-02-03 | 2021-06-15 | 合肥协力液压科技有限公司 | Reversing valve and valve plate type hydraulic valve set with inching adjustment control function |
| CN113931892A (en) * | 2021-09-28 | 2022-01-14 | 中联重科股份有限公司 | Load-sensitive multi-way valve with independently controlled load port and hydraulic system |
| CN114087248A (en) * | 2021-11-02 | 2022-02-25 | 浙江海宏液压科技股份有限公司 | Reversing valve |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4083382A (en) * | 1976-06-03 | 1978-04-11 | J. I. Case Company | Regulating valve with hydraulic detent |
| US4271868A (en) * | 1979-02-21 | 1981-06-09 | Mac Valves, Inc. | Pilot operated pilot valve |
| DE4111946A1 (en) * | 1991-04-12 | 1992-10-15 | Bosch Gmbh Robert | Hydraulic control for a simple hydraulic engine - has a spring controlling the pressure limiter housed in a separate cartridge |
| CN2835676Y (en) * | 2005-10-10 | 2006-11-08 | 合肥长源液压件有限责任公司 | Distributor with little leakage when valve rod in middle |
| CN201007295Y (en) * | 2006-12-18 | 2008-01-16 | 上海立新液压有限公司 | Wet-type electromagnetic direction changing valve |
| RU2342283C1 (en) * | 2007-04-24 | 2008-12-27 | Открытое акционерное общество "Павловский машиностроительный завод ВОСХОД"-ОАО "ПМЗ ВОСХОД" | Four-port three-position hydraulic control valve with reserved electric power controlled wheel steering drive of front chassis support of vehicle with hydraulic damper |
| CN201786797U (en) * | 2010-09-30 | 2011-04-06 | 李金海 | Excavator load sensitive pressure compensation multi-way valve |
| CN106438537A (en) * | 2016-11-25 | 2017-02-22 | 合肥协力液压科技有限公司 | Oil port integration zero-leakage mechanical opening pilot-operated type hydraulic lock device |
| CN106438550A (en) * | 2016-09-09 | 2017-02-22 | 北京精密机电控制设备研究所 | Hydraulic servo actuation system |
| CN208669734U (en) * | 2018-08-09 | 2019-03-29 | 洛阳市荆山液压元件有限公司 | Multi-way valve for hydraulic pressure elevator of tractor |
-
2018
- 2018-08-09 CN CN201810901916.2A patent/CN108999827B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4083382A (en) * | 1976-06-03 | 1978-04-11 | J. I. Case Company | Regulating valve with hydraulic detent |
| US4271868A (en) * | 1979-02-21 | 1981-06-09 | Mac Valves, Inc. | Pilot operated pilot valve |
| DE4111946A1 (en) * | 1991-04-12 | 1992-10-15 | Bosch Gmbh Robert | Hydraulic control for a simple hydraulic engine - has a spring controlling the pressure limiter housed in a separate cartridge |
| CN2835676Y (en) * | 2005-10-10 | 2006-11-08 | 合肥长源液压件有限责任公司 | Distributor with little leakage when valve rod in middle |
| CN201007295Y (en) * | 2006-12-18 | 2008-01-16 | 上海立新液压有限公司 | Wet-type electromagnetic direction changing valve |
| RU2342283C1 (en) * | 2007-04-24 | 2008-12-27 | Открытое акционерное общество "Павловский машиностроительный завод ВОСХОД"-ОАО "ПМЗ ВОСХОД" | Four-port three-position hydraulic control valve with reserved electric power controlled wheel steering drive of front chassis support of vehicle with hydraulic damper |
| CN201786797U (en) * | 2010-09-30 | 2011-04-06 | 李金海 | Excavator load sensitive pressure compensation multi-way valve |
| CN106438550A (en) * | 2016-09-09 | 2017-02-22 | 北京精密机电控制设备研究所 | Hydraulic servo actuation system |
| CN106438537A (en) * | 2016-11-25 | 2017-02-22 | 合肥协力液压科技有限公司 | Oil port integration zero-leakage mechanical opening pilot-operated type hydraulic lock device |
| CN208669734U (en) * | 2018-08-09 | 2019-03-29 | 洛阳市荆山液压元件有限公司 | Multi-way valve for hydraulic pressure elevator of tractor |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109707888A (en) * | 2019-02-19 | 2019-05-03 | 新乡市德恩智能工业有限公司 | A kind of hydraulic trigger-type automatic reset mechanism |
| CN109779997A (en) * | 2019-02-19 | 2019-05-21 | 新乡市德恩智能工业有限公司 | A kind of hydraulic trigger-type automatically resets hydraulic valve |
| CN111156216A (en) * | 2020-01-21 | 2020-05-15 | 日照海卓液压有限公司 | Multi-way valve with integral mechanical pilot check valve and electro-hydraulic proportional control |
| CN111894923A (en) * | 2020-05-22 | 2020-11-06 | 宁波江北宇洲液压设备厂 | Tractor multi-way valve with automatic position jumping function |
| CN112963579A (en) * | 2021-02-03 | 2021-06-15 | 合肥协力液压科技有限公司 | Reversing valve and valve plate type hydraulic valve set with inching adjustment control function |
| CN113931892A (en) * | 2021-09-28 | 2022-01-14 | 中联重科股份有限公司 | Load-sensitive multi-way valve with independently controlled load port and hydraulic system |
| CN113931892B (en) * | 2021-09-28 | 2022-06-14 | 中联重科股份有限公司 | Load-sensitive multi-way valve with independently controlled load port and hydraulic system |
| CN114087248A (en) * | 2021-11-02 | 2022-02-25 | 浙江海宏液压科技股份有限公司 | Reversing valve |
| CN114087248B (en) * | 2021-11-02 | 2022-07-26 | 浙江海宏液压科技股份有限公司 | Reversing valve |
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| CN108999827B (en) | 2024-09-20 |
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