CN108591160A - A kind of hydraulic valve for agricultural machinery - Google Patents
A kind of hydraulic valve for agricultural machinery Download PDFInfo
- Publication number
- CN108591160A CN108591160A CN201810485603.3A CN201810485603A CN108591160A CN 108591160 A CN108591160 A CN 108591160A CN 201810485603 A CN201810485603 A CN 201810485603A CN 108591160 A CN108591160 A CN 108591160A
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- flow
- valve
- end cap
- flow slot
- valve core
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- 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
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B15/00—Elements, tools, or details of ploughs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
-
- 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
- F15B2013/041—Valve members; Fluid interconnections therefor with two positions
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Multiple-Way Valves (AREA)
Abstract
The present invention relates to a kind of hydraulic valves for agricultural machinery, it is characterised in that：Including valve block, reversing valve core, left end cap, right end cap, big plunger, small plunger, first spring and overflow valve, valve block is equipped with oil inlet, oil return opening, first actuator port, second actuator port, first passage and second channel are equipped in valve block, reversing valve core sliding is located in first passage, left end cap and right end cap are separately fixed at left end and the right end of valve block to block first passage, big plunger sliding is located in left end cap and is formed with master control chamber with left end cap, small plunger sliding is located in right end cap and is formed with right control chamber with right end cap, first spring is located in right oil back chamber, overflow valve is set opens second channel with normal off on a second pass, reversing valve core can switch between left position and right end position.In fact a kind of simple in structure, manufacturing cost is low, and the hydraulic valve automatically controlled may be implemented.
Description
Technical field
The invention belongs to hydraulic valve technology more particularly to a kind of hydraulic valves for agricultural machinery.
Background technology
In recent years, China's most area has started to promote and apply hydraulic reversing plough.It is carried out ploughing ashamed industry with pivot plow, be had
Whether there is or not opening and closing ridge, production efficiency is high, energy saving the advantages that.Hydraulic reversing plough is to control left and right two using the hydraulic system of tractor
Plough body alternately operating is covered, to achieve the purpose that without opening and closing ridge.As shown in fig. 6, the switching mechanism of hydraulic reversing plough includes mainly outstanding
Hanger 101, rotation axis 105, plow beam 102 and oil cylinder 103, rotation axis 105 are welded on hanger bracket 101, and plow beam 102, which is mounted on, to be turned
On moving axis 105,103 both ends of oil cylinder are hinged on axis pin on hanger bracket top and plow beam 102 respectively, and plough body 104 is mounted in plow beam 102
On.Oil cylinder is by the HYDRAULIC CONTROL SYSTEM of tractor, and when ploughing in running order, oil cylinder is in maximum elongation state.It is overturning
When commutation, needs first control cylinder to shorten and plow beam is driven to be flipped up, when plow beam is approximately rotated to upright position, then control oil
Cylinder stretches out, and plow beam is made to cross " dead point " position, cylinder thrust and and gravity under the action of continue to rotate, until the other side works
Stop when position.
Currently, for the overturning control valve of control cylinder, there are mainly two types of forms both at home and abroad, one is the overturnings of manual hydraulic pressure
Control valve, another kind are automatic turning control valves.Manual mode is that manual guiding valve control cylinder is directly manipulated by operator on the tractor
Oil circuit makes alternating plough starting overturning, and plough stirs shift fork in middle position and drives a rotary valve that oil path in oil cylinder is made to convert, and completes to turn over
Convert to, this overturning control valve operator on the tractor in headland turn will also grasp in addition to manipulation direction disk, lifting plough
Vertical overturning control valve, it is very nervous and busy for completing these types action in very short time, and labor intensity increases；It needs simultaneously
It is also high that complexity, cost are not only constructed using two control valves.Automatic turning control valve is to utilize two rotary valves of a set of mechanism controls,
So that the first rotary valve is manipulated oil path in oil cylinder makes plough starting overturning, the second rotary valve control the conversion of oil path in oil cylinder in switching process and realize
The overturning of plough commutates.Although this switching mechanism realizes full-automatic inverting commutation.But structure is sufficiently complex, poor reliability,
But also it need to be still very high with two control rotary valve costs.
Invention content
A kind of simple in structure, manufacture is provided the technical problem to be solved by the present invention is to present situation for the above-mentioned prior art
It is at low cost, may be implemented the hydraulic valve that automatic turning commutation control is calculated pivot plow.
Technical solution is used by the present invention solves above-mentioned technical problem：A kind of hydraulic valve for agricultural machinery, feature
It is：Including valve block, valve block is equipped with oil inlet, oil return opening, the first actuator port and the second actuator port；First passage, the
There is the first through-flow slot, the second through-flow slot, third is through-flow slot, four-way chute and the 5th through-flow slot, valve of annular on one channel
The first flow for being connected to the first through-flow slot and the 5th through-flow slot, the second through-flow slot and the first actuator port phase are additionally provided on block
Connection, third is through-flow, and slot is connected with oil inlet, and four-way chute is connected with the second actuator port, the 5th through-flow slot and oil return
Mouth is connected；Reversing valve core is set to first passage and can slide, and it is convex that reversing valve core is equipped with the first convex shoulder, the second convex shoulder, third
Shoulder, the 4th convex shoulder, the 5th convex shoulder and the 6th convex shoulder, right oil back chamber are logical by the second flow-conveying groove being located on the 6th convex shoulder and the 5th
Chute communicates, and reversing valve core can switch between left position and right end position；Big plunger, sliding are set in left end cap, huge pillar
It is formed with master control chamber between plug and left end cap, left oil back chamber is formed between big plunger and reversing valve core, master control chamber passes through damping
Device is connected with the second actuator port, and left oil back chamber passes through the first flow-conveying groove and the first through-flow slot phase that are located on the first convex shoulder
It is logical；Right end cap is fixedly connected on the right end of valve block to block first passage；Small plunger, sliding are set in right end cap, small plunger
Diameter is less than the diameter of big plunger, secondary control chamber is formed between small plunger and right end cap, secondary control chamber passes through second flow channel and oil inlet
Mouthful be connected, be formed with right oil back chamber between small plunger and reversing valve core, right oil back chamber by be located on the 6th convex shoulder second
Flow-conveying groove is communicated with the 5th through-flow slot, and the first spring for making reversing valve core keep moving to left trend is equipped in right oil back chamber；Second is logical
Road, second channel is for being connected to the first actuator port and main control chamber；Overflow valve opens second on second channel for normal off
Channel, the first port of overflow valve are connected with the first actuator port, and the second port of overflow valve is connected with main control chamber, when
After firstth actuator port pressure reaches certain value, overflow valve is opened, and fluid flows into main control chamber by the first actuator port.
Preferably, when reversing valve core is in left position, the second through-flow slot is connected with the through-flow slot of third, and the 4th
Through-flow slot is connected with the 5th through-flow slot；When reversing valve core is in right end position, the second through-flow slot is connected with the first through-flow slot
It is logical, and the through-flow slot of third is connected with four-way chute.
Preferably, overflow valve described above includes poppet valve core, sliding sleeve, second spring and swivel nut, swivel nut is fixedly connected on
In valve block, second spring is located in the inner cavity of swivel nut, and sliding sleeve sliding is located in the endoporus of valve block, the step of the upper end and poppet valve core
It offsets, lower end offsets with second spring, and poppet valve core keeps blocking the trend of valve port under the active force of second spring.
Compared with the prior art, the advantages of the present invention are as follows：
(1) simple and reasonable for structure, parts are few, at low cost.
(2) it by the design of principle, can realize automatically to the retraction for overturning cylinder, the sequential control stretched out again, to complete
The automatic turning control of pairs of hydraulic reversing plough, is not necessarily to human intervention, high degree of automation.
Description of the drawings
Fig. 1 is the sectional view of the embodiment of the present invention；
Fig. 2 is the A-A sectional views in Fig. 1；
Fig. 3 is schematic diagram of the reversing valve core of the embodiment of the present invention in right end operating position；
Fig. 4 is the hydraulic schematic diagram of the embodiment of the present invention；
Fig. 5 is the embodiment of the present invention using hydraulic schematic diagram；
Fig. 6 is the schematic diagram of hydraulic turnover mechanism.
Specific implementation mode
Below in conjunction with attached drawing embodiment, present invention is further described in detail.
As shown in Figures 1 to 3, it is a preferred embodiment of the present invention.
A kind of hydraulic valve for agricultural machinery, including：
Valve block 2, valve block 2 are equipped with oil inlet P, oil return inlet T, the first actuator port A and the second actuator port B；
On first passage L1, first passage L1 have annular the first through-flow slot 201, the second through-flow slot 202, third is through-flow
Slot 203, four-way chute 204 and the 5th through-flow slot 205 are additionally provided in valve block 2 logical for being connected to the first through-flow slot 201 and the 5th
The first flow 21 of chute 205, the second through-flow slot 202 are connected with the first actuator port A, third is through-flow slot 203 and oil inlet P
It is connected, four-way chute 204 is connected with the second actuator port B, and the 5th through-flow slot 205 is connected with oil return inlet T；
Reversing valve core 3 is set to first passage L1 and can slide, and reversing valve core 3 is equipped with the first convex shoulder 3a, the second convex shoulder
3b, third convex shoulder 3c, the 4th convex shoulder 3d, the 5th convex shoulder 3e and the 6th convex shoulder 3f, reversing valve core 3 can be in left positions and right end position
Switch between setting, when reversing valve core 3 is in left position, the second through-flow slot 202 and third are through-flow, and slot 203 is connected, and
Four-way chute 204 is connected with the 5th through-flow slot 205；When reversing valve core 3 is in right end position, the second through-flow slot 202 and
One through-flow slot 201 is connected, and the through-flow slot of third 203 is connected with four-way chute 204.
Left end cap 1 is fixedly connected on the left end of valve block 2 to block first passage L1；Big plunger 7, sliding are set to left end cap 1
It is interior, it is formed with master control chamber 1a between big plunger 7 and left end cap 1, left oil back chamber 2a is formed between big plunger 7 and reversing valve core 3,
Master control chamber 1a is connected by damper 8 with the second actuator port B, left oil back chamber 2a by be located on the first convex shoulder 3a first
Flow-conveying groove 31 is communicated with the first through-flow slot 201；
Right end cap 4 is fixedly connected on the right end of valve block 2 to block first passage L1；Small plunger 6, sliding are set to right end cap 4
Interior, the diameter of small plunger 6 is less than the diameter of big plunger 7, and secondary control chamber 4a, small plunger 6 are formed between small plunger 6 and right end cap 4
It is formed with right oil back chamber 2b between reversing valve core 3, right oil back chamber 2b passes through the second flow-conveying groove 32 for being located on the 6th convex shoulder 3f
It is communicated with the 5th through-flow slot 205, the first spring 5 for making reversing valve core 3 keep moving to left trend is equipped in right oil back chamber 2b；
Second channel L2, second channel L2 are for being connected to the first actuator port A and master control chamber 1a；Overflow valve 9 is set to second
Second channel L2 is opened for normal off on the L2 of channel, the first port of overflow valve 9 is connected with the first actuator port A, overflow valve 9
Second port is connected with main control chamber 1a, after the first actuator port A pressure reaches certain value, overflow valve 9 open, fluid by
First actuator port A flows into main control chamber 1a.Overflow valve 9 includes poppet valve core 91, sliding sleeve 92, second spring 93 and swivel nut 94, spiral shell
Set 94 is fixedly connected in valve block 2, and second spring 93 is located in the inner cavity of swivel nut 94, and sliding sleeve 92 slides the endoporus for being located at valve block 2
In, the upper end and the step of poppet valve core 91 offset, and lower end offsets with second spring 93, are bored under the active force of second spring 93
Spool 91 keeps blocking the trend of valve port 9a.
The operation principle and process of the present invention is as follows：
In application, as shown in Figure 5 (hydraulic lock being actually connected on oil cylinder 13 in figure has been left out), by the present invention's 12
Oil inlet P is connected with the actuator port A1 of the solenoid directional control valve 11 for controlling fuel feeding with B1 respectively with oil return inlet T, of the invention
First actuator port A connections overturn the rod chamber of cylinder 13, and the second actuator port B connections overturn the rodless cavity of cylinder 13.
When pivot plow is in running order, need not be overturn, solenoid directional control valve 11 is in power failure state, oily at this time
Mouth A1, B1 are communicated with oil return inlet T 1, then the oil inlet P of the present invention 12 and oil return inlet T are also at passive state, in the first spring 5
Active force under, reversing valve core 3 is in position as shown in Figure 2, and the second through-flow slot 202 and third are through-flow, and slot 203 is connected, and
Four-way chute 204 is connected with the 5th through-flow slot 205.
When needing control pivot plow to be overturn, solenoid directional control valve 11 is made to charge, then oil inlet P of the invention and hydraulic pressure
10 outlet of pump is connected, and oil return inlet T is connected with fuel tank, as shown in Figure 1, when oil inlet P oil inlet, fluid by oil inlet P successively
Enter secondary control chamber 4a after the through-flow slot 203 of third, second flow channel 22 and active force to the left applied to small plunger 6, small plunger 6 to
Under the active force of left thrust and the first spring 5, reversing valve core 3 keeps position as shown in Figure 1.The oil that hydraulic pump 10 exports
Liquid enters oil inlet P after solenoid directional control valve 11, then passes through the through-flow slot 203 of third, the second through-flow slot 202, the first work successively
Enter the rod chamber for overturning cylinder 13 after making hydraulic fluid port A, push overturning cylinder 13 to retract and plow beam is driven to be flipped up, and overturns cylinder 13 without bar
The fluid of chamber returns to fuel tank after the second actuator port B, four-way chute 204, the 5th through-flow slot 205, oil return inlet T successively.
After overturning the retraction of cylinder 13 to the end, that is, when drive plow beam arrival " dead-centre position ", the pressure of the first actuator port A
Power rises rapidly, and when pressure rises to the setting pressure of overflow valve 9, poppet valve core 91 is opened, the fluid warp of the first actuator port A
Valve port 9a enters master control chamber 1a, and the pressure of master control chamber 1a and secondary control chamber 4a are equal at this time, but because of the diameter of big plunger 7 more than small
The diameter of plunger 6, the resultant force on reversing valve core 3 to the right push reversing valve core 3 to move right, are finally displaced into as shown in Figure 3
Right end position, the second through-flow slot 202 is connected with the first through-flow slot 201 at this time, and the through-flow slot 203 of third and four-way chute
204 are connected, while overflow valve 9 is closed, and the fluid of the second actuator port B makes reversing valve core 3 through damper 8 into master control chamber 1a
It keeps being in right end position, overturning cylinder 13 starts to drive plow beam to downwardly turn over to stretching.
After overturning the stretching of cylinder 13 in place, the pressure of the second actuator port B rises, and reversing valve core 3 is made to be continually maintained in Fig. 3
Shown position.At this point, making 11 dead electricity of solenoid directional control valve, the pressure of oil inlet P disappears, effect of the reversing valve core 3 in the first spring 5
Under return to position shown in Fig. 1, in next step overturning control prepare.Therefore, driver only needs to control automatically controlled button
It completes to control the automatic turning of pivot plow, human intervention is not necessarily in the transfer process turned under pivot plow is translated into from above.
Claims (3)
1. a kind of hydraulic valve for agricultural machinery, it is characterised in that：Including
Valve block (2), valve block (2) are equipped with oil inlet (P), oil return opening (T), the first actuator port (A) and the second actuator port B)；
First passage (L1) has the first through-flow slot (201), the second through-flow slot (202), third of annular on first passage (L1)
Through-flow slot (203), four-way chute (204) and the 5th through-flow slot (205) are additionally provided in valve block (2) through-flow for being connected to first
The first flow (21) of slot (201) and the 5th through-flow slot (205), the second through-flow slot (202) are connected with the first actuator port (A)
Logical, third is through-flow, and slot (203) is connected with oil inlet (P), and four-way chute (204) is connected with the second actuator port (B), the
Five through-flow slots (205) are connected with oil return opening (T)；
Reversing valve core (3), being set to first passage (L1) and can slide, and reversing valve core (3) is equipped with the first convex shoulder (3a), second convex
Shoulder (3b), third convex shoulder (3c), the 4th convex shoulder (3d), the 5th convex shoulder (3e) and the 6th convex shoulder (3f), reversing valve core (3) can be on a left side
Switch between end position and right end position；
Left end cap (1) is fixedly connected on the left end of valve block (2) to block first passage (L1)；
Big plunger (7), sliding are set in left end cap (1), are formed with master control chamber (1a) between big plunger (7) and left end cap (1), greatly
Left oil back chamber (2a) is formed between plunger (7) and reversing valve core (3), master control chamber (1a) passes through damper (8) and the second work
Hydraulic fluid port (B) is connected, and left oil back chamber (2a) passes through the first flow-conveying groove (31) being located on the first convex shoulder (3a) and the first through-flow slot
(201) it communicates；
Right end cap (4) is fixedly connected on the right end of valve block (2) to block first passage (L1)；
Small plunger (6), sliding are set in right end cap (4), and the diameter of small plunger (6) is less than the diameter of big plunger (7), small plunger
(6) it is formed with secondary control chamber (4a) between right end cap (4), right oil back chamber is formed between small plunger (6) and reversing valve core (3)
(2b), secondary control chamber (4a) are connected by second flow channel (22) with oil inlet (P), and right oil back chamber (2b) is by being located at the 6th convex shoulder
The second flow-conveying groove (32) on (3f) is communicated with the 5th through-flow slot (205), and being equipped in right oil back chamber (2b) makes reversing valve core (3) protect
Hold the first spring (5) for the trend of moving to left；
Second channel (12), second channel (12) is for being connected to the first actuator port (A) and main control chamber (1a)；
Overflow valve (9) is set on second channel (L2) and opens second channel (L2) for normal off, the first port of overflow valve (9) and
First actuator port (A) is connected, and the second port of overflow valve (9) is connected with main control chamber (1a), when the firstth working oil
After mouth (A) pressure reaches certain value, overflow valve (9) is opened, and fluid flows into master control chamber (1a) by the first actuator port (A).
2. a kind of hydraulic valve for agricultural machinery according to claim 1, it is characterised in that：When reversing valve core (3) is in a left side
When end position, the second through-flow slot (202) is connected with the through-flow slot of third (203), and four-way chute (204) and the 5th through-flow slot
(205) it is connected；When reversing valve core (3) is in right end position, the second through-flow slot (202) is connected with the first through-flow slot (201)
It is logical, and the through-flow slot of third (203) is connected with four-way chute (204).
3. a kind of hydraulic valve for agricultural machinery according to claim 1, it is characterised in that：The overflow valve (9) includes cone
Spool (91), sliding sleeve (92), second spring (93) and swivel nut (94), swivel nut (94) are fixedly connected in valve block (2), second spring
(93) it is located in the inner cavity of swivel nut (94), sliding sleeve (92) sliding is located in the endoporus of valve block (2), the upper end and poppet valve core (91)
Step offsets, and lower end offsets with second spring (93), and poppet valve core (91) keeps blocking under the active force of second spring (93)
The firmly trend of valve port (9a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810485603.3A CN108591160B (en) | 2018-05-18 | 2018-05-18 | Hydraulic valve for agricultural machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810485603.3A CN108591160B (en) | 2018-05-18 | 2018-05-18 | Hydraulic valve for agricultural machinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108591160A true CN108591160A (en) | 2018-09-28 |
| CN108591160B CN108591160B (en) | 2020-09-25 |
Family
ID=63632092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810485603.3A Active CN108591160B (en) | 2018-05-18 | 2018-05-18 | Hydraulic valve for agricultural machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108591160B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101852223A (en) * | 2009-03-30 | 2010-10-06 | 徐州重型机械有限公司 | Hydraulic control valves and telescopic arm control system with the same |
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| US20130306180A1 (en) * | 2012-05-15 | 2013-11-21 | Robert Bosch Gmbh | Hydraulic Block for a Slip-Controlled Vehicle Brake System |
| CN203770272U (en) * | 2013-12-13 | 2014-08-13 | 三一汽车制造有限公司 | Integrated hydraulic valve set, hydraulic drive system and concrete pump |
| CN104088837A (en) * | 2014-07-02 | 2014-10-08 | 徐州重型机械有限公司 | Oil cylinder sequential action hydraulic control system and engineering machinery device |
| CN205117855U (en) * | 2015-07-31 | 2016-03-30 | 湖南鸿辉科技有限公司 | Integrated topping up valves of full hydraulic braking of wheeled engineering machinery |
| CN205243997U (en) * | 2015-12-18 | 2016-05-18 | 黄培华 | Hydraulic pressure lock speed governing combination switching -over valve |
-
2018
- 2018-05-18 CN CN201810485603.3A patent/CN108591160B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852223A (en) * | 2009-03-30 | 2010-10-06 | 徐州重型机械有限公司 | Hydraulic control valves and telescopic arm control system with the same |
| US20130306180A1 (en) * | 2012-05-15 | 2013-11-21 | Robert Bosch Gmbh | Hydraulic Block for a Slip-Controlled Vehicle Brake System |
| CN202732519U (en) * | 2012-07-13 | 2013-02-13 | 三一重工股份有限公司 | Hydraulic valve, hydraulic valve group, hydraulic system and engineering machine |
| CN203770272U (en) * | 2013-12-13 | 2014-08-13 | 三一汽车制造有限公司 | Integrated hydraulic valve set, hydraulic drive system and concrete pump |
| CN104088837A (en) * | 2014-07-02 | 2014-10-08 | 徐州重型机械有限公司 | Oil cylinder sequential action hydraulic control system and engineering machinery device |
| CN205117855U (en) * | 2015-07-31 | 2016-03-30 | 湖南鸿辉科技有限公司 | Integrated topping up valves of full hydraulic braking of wheeled engineering machinery |
| CN205243997U (en) * | 2015-12-18 | 2016-05-18 | 黄培华 | Hydraulic pressure lock speed governing combination switching -over valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108591160B (en) | 2020-09-25 |
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