CN109368499A - Step-down multi-way valve and lower vehicle control for lorry-mounted crane - Google Patents
Step-down multi-way valve and lower vehicle control for lorry-mounted crane Download PDFInfo
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- CN109368499A CN109368499A CN201811494534.9A CN201811494534A CN109368499A CN 109368499 A CN109368499 A CN 109368499A CN 201811494534 A CN201811494534 A CN 201811494534A CN 109368499 A CN109368499 A CN 109368499A
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- 230000002457 bidirectional effect Effects 0.000 claims abstract description 17
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 239000003921 oil Substances 0.000 description 85
- 239000007788 liquid Substances 0.000 description 15
- 230000035939 shock Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000000446 fuel Substances 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 239000002828 fuel tank Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000032258 transport Effects 0.000 description 3
- 206010037660 Pyrexia Diseases 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000005906 menstruation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/20—Control systems or devices for non-electric drives
-
- 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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention belongs to lorry-mounted crane technical field of hydraulic, and in particular to a kind of step-down multi-way valve and lower vehicle control for lorry-mounted crane, including operating valve, hydraulic control one-way valve and selector valve, operating valve are connected with selector valve；Selector valve is connected with bidirectional hydraulic lock, and operating valve is also connected with hydraulic control one-way valve；The operating valve is three six-way transfer valves, and the selector valve is three position four-way directional control valve.Selector valve is connected with support oil cylinder and cross cylinder respectively, and bidirectional hydraulic lock is additionally provided between selector valve and support oil cylinder, and support oil cylinder and cross cylinder are also connected with operating valve.Valve body of the invention is optimized, and the switching valve of big flow is separately configured in the system of getting off, and for system switching of getting on or off the bus, reasonable distribution is got on the bus high flow rate oil supply, Small Flow Control of getting off, and reduces energy consumption, and promotion is got off system performance.
Description
Technical field
The invention belongs to lorry-mounted crane technical field of hydraulic, and in particular to a kind of getting off for lorry-mounted crane
Multi-way valve and lower vehicle control.
Background technique
Lorry-mounted crane is a kind of rack-mounted in the new and effective lifting transport dress on chassis vehicle, integrating lifting, transport
It is standby.Its working principle is that hydraulic oil pump rotation is driven by power taking in automobile gearbox, is provided to each hydraulic element high
Pressure oil, to realize the various movements of lorry-mounted crane.Lorry-mounted crane is quick with its, flexible, efficient, convenient and handling,
It transports the advantage being combined into one to be recognized and received by user, is widely used in communications and transportation, civil construction, Communication power and city
The cargo handling of the industries such as pipeline network construction and microinvasion cargo.
Lorry-mounted crane is generally divided into vehicle control up and down, and complete machine control system is to getting on the bus via lower vehicle control
System fuel feeding.It is lower to manipulate flow needed for Multi-way valve with support leg of getting off, and then needs big flow to fuel feeding of getting on the bus, while control system of getting off
Pressure needed for system is limited, has extended and retracted biggish pressure difference in oil cylinder, and the system of getting on the bus needs then to need when operation hoist
Want high pressure.Existing step-down multi-way valve valve body is mostly single flow valve body, and valve body flow is lower, needs big stream for system of getting on the bus
The case where amount, oil liquid flow through step-down multi-way valve to get on the bus system fuel feeding when, descending valve know from experience generate restriction loss, work long hours
The case where meeting generation system fever.Only main oil pressure relief is arranged according to complete machine in lower vehicle control, can not optimize system pressure of getting off
Power, simultaneously because lower vehicle control shares for the small chamber of all oil cylinders, when starting a certain cylinder action, especially horizontal cylinder is dynamic
Make, certain compression shock can be generated.
Summary of the invention
Place, the present invention provide a kind of multichannel of getting off for lorry-mounted crane in order to overcome the above-mentioned deficiencies of the prior art
Valve and lower vehicle control.So that vehicle control pressure, flow classification, reduction system heat generation amount subtract lorry-mounted crane up and down
Few compression shock, lifting system stability.
The present invention is achieved through the following technical solutions: a kind of step-down multi-way valve for lorry-mounted crane, including work
Make valve, hydraulic control one-way valve and selector valve, operating valve is connected with selector valve；Selector valve is connected with bidirectional hydraulic lock, operating valve
Also it is connected with hydraulic control one-way valve；The operating valve is three six-way transfer valves, and the selector valve is 3-position 4-way commutation
Valve.
Further, the operating valve is three O-shaped six-way transfer valves of Median Function, when operating valve is in upper station
Its oil inlet is connected with actuator port B, and actuator port A is connected with operating valve oil return opening；When operating valve is in lower station its
Oil inlet is connected with actuator port A, and actuator port B is connected with operating valve oil return opening.
Further, the selector valve is the O-shaped three position four-way directional control valve of Median Function.
Further, overflow valve I is equipped between the oil inlet P of step-down multi-way valve and the oil return inlet T of step-down multi-way valve.
Further, overflow valve II is equipped between the actuator port B of the operating valve and the oil return inlet T of step-down multi-way valve.
Further, check valve is additionally provided between the actuator port B of the operating valve and the oil return inlet T of step-down multi-way valve.
Further, the overflow valve II is the direct-acting overflow valve with check valve.
Further, overflow valve III is equipped between the actuator port A of the operating valve and the oil return inlet T of step-down multi-way valve.
Further, check valve is additionally provided between the actuator port A of the operating valve and the oil return inlet T of step-down multi-way valve.
Further, the overflow valve III is the direct-acting overflow valve with check valve.
The present invention also provides a kind of lower vehicle control using above-mentioned any one step-down multi-way valve, the selections
Valve is connected with support oil cylinder and cross cylinder respectively, and bidirectional hydraulic lock is additionally provided between selector valve and support oil cylinder, supporting leg
Oil cylinder and cross cylinder are also connected with operating valve.The actuator port B1 and bidirectional hydraulic lock of selector valve are connected to support oil cylinder without bar
The hydraulic control one-way valve of chamber is connected, and another hydraulic control one-way valve of bidirectional hydraulic lock is connected with support oil cylinder rod chamber；Described
The actuator port A1 of selector valve is connected with cross cylinder rodless cavity.
Operating valve of the present invention can be given to get on the bus at middle position acts fuel feeding, is then used to control branch in remaining station
The stretching and retraction of leg oil cylinder and cross cylinder；Operating valve is set as big orifice valve body, is provided greatly at middle position to movement of getting on the bus
Flow, to promote overall operation efficiency.Three overflow valves that the present invention is arranged then are used to distinguish complete machine rated pressure and get off
Oil cylinder expanding-contracting action rated pressure, to reduce energy consumption, promotes complete machine so that movement of getting off acts operation compared with low pressure
Safety.Overflow valve positioned at the two sides of oil cylinder size chamber plays the role of safety back pressure valve, for slowing down and eliminating oil cylinder
The hydraulic shock generated when commutation starting, so that the service life for oil cylinder of getting off gets a promotion；The selector valve is for selecting
The oil cylinder for needing to act；The hydraulic control one-way valve plays pressure maintaining supporting role.
The beneficial effects of the present invention are: (1) valve body is optimized, the switching of big flow is separately configured in the system of getting off
Valve, for system switching of getting on or off the bus, reasonable distribution is got on the bus high flow rate oil supply, and Small Flow Control of getting off reduces energy consumption, and promotion is got off
System performance.
(2) step-down multi-way valve introduces multistage overflow valve, limits pressure relative to a main overflow is only leaned on originally, so that hair
Heat reduces, to reduce energy consumption.
(3) step-down multi-way valve introduces multistage overflow valve, in addition to that can limit oil cylinder size cavity pressure, while playing safety back
The effect of pressure valve, for slowing down and eliminating the hydraulic shock generated when hydraulic cylinder commutation starting, so that the use for oil cylinder of getting off
Service life gets a promotion.
Detailed description of the invention
Fig. 1 is first embodiment of the invention hydraulic schematic diagram；
Fig. 2 is second embodiment of the invention hydraulic schematic diagram；
Fig. 3 is third embodiment of the invention hydraulic schematic diagram；
Fig. 4 is fourth embodiment of the invention hydraulic schematic diagram；
Fig. 5 is fifth embodiment of the invention hydraulic schematic diagram；
In figure, 1, overflow valve I, 2, operating valve, 3, hydraulic control one-way valve, 4, selector valve, 5, bidirectional hydraulic lock, 6, support oil cylinder, 7,
Cross cylinder, 8, overflow valve II, 9, overflow valve III.
Specific embodiment
Below according to drawings and examples, the present invention is further described.
Embodiment one:
As shown in Figure 1, a kind of step-down multi-way valve for lorry-mounted crane, including operating valve 2 and selector valve 4, during operating valve 2 is
Three O-shaped six-way transfer valves of median function, selector valve 4 are the O-shaped three position four-way directional control valve of Median Function, the work of operating valve 2
Hydraulic fluid port B is connected with the oil inlet C of selector valve 4, its oil inlet C is connected with actuator port B1 when selector valve 4 is in upper station,
Its oil inlet C is connected with actuator port A1 when selector valve 4 is in lower station, the actuator port B1 and bidirectional hydraulic of selector valve 4
The hydraulic control one-way valve that lock 5 is connected to 6 rodless cavity of support oil cylinder is connected, another liquid of 6 rod chamber of support oil cylinder and bidirectional hydraulic lock 5
Control check valve is connected, and the hydraulic control one-way valve of the bidirectional hydraulic lock 5 of 6 rod chamber of connection leg oil cylinder passes through connection hydraulic control again
Check valve 3 is connected with the actuator port A of operating valve 2, and the control terminal of hydraulic control one-way valve 3 is connected with the actuator port B of operating valve 2
It connects, when the control terminal of hydraulic control one-way valve 3 is without hydraulic coupling, oil liquid is only capable of flowing to support oil cylinder 6 from the actuator port A of operating valve 2
Rod chamber；The actuator port A1 of selector valve 4 is connected with the rodless cavity of cross cylinder 7, and the rod chamber of cross cylinder 7 is also by liquid
Control check valve 3 is connected with the actuator port A of operating valve 2；When operating valve 2 is in middle position, the oil inlet P of step-down multi-way valve only with
The actuator port V of step-down multi-way valve is connected, the upper vehicle hydraulic system phase of the actuator port V and lorry-mounted crane of step-down multi-way valve
Connection；The oil inlet of operating valve 2 is connected with the oil inlet P of step-down multi-way valve, the oil return opening of operating valve 2 and returning for selector valve 4
Hydraulic fluid port is connected with the oil return inlet T of step-down multi-way valve.When in use, more positioned at getting off at external setting one of step-down multi-way valve
Overflow valve between road valve oil inlet P and step-down multi-way valve oil return inlet T, overflow valve is for controlling complete machine rated pressure.
When upper vehicle control operation, higher operating speed is generally required, this just needs pumping source to provide larger flow, is
This just needs for operating valve 2 to be designed to big port valve body, and metered flow can accomplish 120L/min, and selector valve 4 is selected and needs to act
Oil cylinder after, manipulate operating valve 2, cylinder action of getting off, need to be compared with low discharge, from economic considerations without too fast, selector valve 4
It is designed to small promoting menstruation valve body, metered flow accomplishes 60L/min.
At work, after pumping source oil liquid enters operating valve 2, if not manipulating operating valve 2, oil liquid is from work for step-down multi-way valve
The middle bit stream of valve 2 gives upper vehicle control fuel feeding from V mouthfuls to the V mouth of step-down multi-way valve.
It manipulates selector valve 4 and is in upper, the oil cylinder for selecting movement is support oil cylinder 6, then manipulates operating valve 2 positioned at upper
When, oil liquid is come out from B mouthfuls of the actuator port of operating valve 2 again by the oil inlet that the oil inlet P of step-down multi-way valve enters operating valve 2,
The oil inlet C of choice of flow direction valve 4 flows to bidirectional hydraulic lock 5 from the actuator port B1 of selector valve 4 again, then flows from bidirectional hydraulic lock 5
Into support oil cylinder 6 rodless cavity to pushing supporting leg to stretch out, the oil liquid in the rod chamber of support oil cylinder 6 is then from the two-way liquid of conducting
Pressure 5 another hydraulic control one-way valves of lock flow to hydraulic control one-way valve 3, since the control terminal of hydraulic control one-way valve 3 has worked via from operating valve 2
The hydraulic oil of hydraulic fluid port B outflow is opened, so oil liquid can flow counterflow through, and returns to multichannel of getting off via the actuator port A of operating valve 2
The oil return inlet T of valve is to flow into fuel tank.And when manipulating operating valve 2 positioned at bottom, the oil inlet P of step-down multi-way valve enters operating valve
2 oil inlet comes out from A mouthfuls of the actuator port of operating valve 2 again, flows to hydraulic control one-way valve 3, then flow to bidirectional hydraulic lock 5 from D mouthfuls,
To push supporting leg to withdraw, the oil liquid in the rodless cavity of support oil cylinder then returns to selector valve 4 from the actuator port B1 of selector valve 4
Oil inlet C, then the actuator port B of operating valve 2 is flowed to by the oil inlet C of selector valve 4, then return by the actuator port B of operating valve 2
To step-down multi-way valve oil return inlet T to flowing into fuel tank.
Manipulate selector valve 4 be in bottom, select movement oil cylinder be cross cylinder, then manipulate operating valve 2 be located at it is upper when,
Oil liquid is by after P mouthfuls to B mouthfuls, then from C mouthfuls to A1, so that cross cylinder 7 be pushed to stretch out, the oil liquid in 7 rod chamber of cross cylinder is then
T mouthfuls reversely, which are returned to, by A mouthfuls from the hydraulic control one-way valve 3 of conducting flows into fuel tank.And when manipulating operating valve 2 positioned at bottom, oil liquid is by P mouthfuls
To after A mouthfuls of conducting hydraulic control one-way valves 3, then the rod chamber of cross cylinder 7 is flowed to from D mouthfuls, pushes cross cylinder to withdraw, cross cylinder
Oil liquid in 7 rodless cavities returns to T mouthfuls then from A1 mouthfuls to C mouthfuls, then by B mouthfuls to flow into fuel tank.
In this example, it is contemplated that support oil cylinder is needed that bidirectional hydraulic lock is arranged, quiet by gravity and support reaction double influence
Lock support oil cylinder when state, and cross cylinder is substantially by load effect, therefore not set bidirectional hydraulic lock, and cross cylinder is quiet
It is withdrawn when state and tends to be influenced by back pressure, had the risk for pushing cross cylinder if back pressure is higher, therefore be arranged in valve body
Hydraulic control one-way valve, for eliminating this risk.
Embodiment two:
As shown in Fig. 2, on the basis of example 1, be arranged in the valve body of step-down multi-way valve one be located at step-down multi-way valve into
Overflow valve I 1 between hydraulic fluid port P and step-down multi-way valve oil return inlet T, saves the trouble of external overflow valve.
Embodiment three:
As shown in figure 3, secondary overflow valve is arranged in step-down multi-way valve on the basis of embodiment one and embodiment two, working
Overflow valve II 8 is equipped between the actuator port B of valve 2 and the oil return inlet T of step-down multi-way valve, overflow valve II 8 is for controlling support oil cylinder 6
Rodless cavity and cross cylinder 7 rodless cavity pressure.
Example IV:
As shown in figure 4, secondary overflow valve is arranged in step-down multi-way valve on the basis of embodiment one and embodiment two, working
Overflow valve III 9 is equipped between the actuator port A of valve 2 and the oil return inlet T of step-down multi-way valve, overflow valve III 9 is for controlling support oil cylinder 6
Rod chamber and cross cylinder 7 rod chamber pressure.
Embodiment five:
As shown in figure 5, embodiment five is the merging of embodiment three and example IV；Operating valve 2 actuator port B and get off it is more
It is equipped with overflow valve II 8 between the oil return inlet T of road valve, is equipped between the actuator port A of operating valve 2 and the oil return inlet T of step-down multi-way valve
Overflow valve III 9, the pressure that overflow valve II 8 is set are lower than the setting pressure of overflow valve III 9, and overflow valve II 8 and overflow valve III 9 are set
Constant-pressure is below the setting pressure of overflow valve I 1.Guarantee is got off to be run in a low voltage state, to reduce energy consumption, reduces fever
The phenomenon that.
Embodiment six:
Embodiment three, example IV and embodiment five are further optimized, corresponding overflow valve is also parallel with one unidirectionally
Valve, check valve play repairing function.
Embodiment seven:
Embodiment six is further improved, overflow valve is all made of the direct-acting overflow valve with check valve, and integrated valve body can be with
The space for saving step-down multi-way valve, is arranged this overflow valve in addition to pressure limiting is also used as safety valve to use, in oil in next multi-way valve
When cylinder commutates, it can slow down and eliminate the hydraulic shock generated when oil cylinder commutation starting, to promote the life longevity for oil cylinder of getting off
Life.
Embodiment eight:
It is set in these embodiments to overflow for embodiment three, example IV, embodiment five, embodiment six and embodiment seven
Stream valve or check valve can be realized by the way of external.
The valve body of next multi-way valve is optimized, and the switching valve of big flow is separately configured in the system of getting off, for up and down
The switching of vehicle system, reasonable distribution are got on the bus high flow rate oil supply, Small Flow Control of getting off, and reduce energy consumption, and promotion is got off system performance.Under
Vehicle multi-way valve introduces multistage overflow valve, limits pressure relative to a main overflow is only leaned on originally, so that calorific value reduces, thus
Reduce energy consumption.Step-down multi-way valve introduces multistage overflow valve, in addition to that can limit oil cylinder size cavity pressure, while playing safety back
The effect of pressure valve, for slowing down and eliminating the hydraulic shock generated when hydraulic cylinder commutation starting, so that the use for oil cylinder of getting off
Service life gets a promotion.
Claims (10)
1. a kind of step-down multi-way valve for lorry-mounted crane, it is characterised in that: including operating valve (2), hydraulic control one-way valve (3) and
Selector valve (4), operating valve (2) are connected with selector valve (4)；Selector valve (4) is connected with bidirectional hydraulic lock (5), operating valve (2)
Also it is connected with hydraulic control one-way valve (3)；The operating valve (2) is three six-way transfer valves, and the selector valve (4) is three
Four-way reversing valve.
2. the step-down multi-way valve according to claim 1 for lorry-mounted crane, it is characterised in that: the operating valve
It (2) is three O-shaped six-way transfer valves of Median Function, its oil inlet is connected with actuator port B when operating valve (2) is in upper station
Logical, actuator port A is connected with operating valve (2) oil return opening；Its oil inlet and actuator port A when operating valve (2) is in lower station
It is connected, actuator port B is connected with operating valve (2) oil return opening；The selector valve (4) is O-shaped three four of Median Function
Logical reversal valve.
3. the step-down multi-way valve according to claim 1 or 2 for lorry-mounted crane, it is characterised in that: step-down multi-way valve
Oil inlet P and step-down multi-way valve oil return inlet T between be equipped with overflow valve I (1).
4. the step-down multi-way valve according to claim 1 or 2 for lorry-mounted crane, it is characterised in that: the work
Overflow valve II (8) is equipped between the actuator port B of valve (2) and the oil return inlet T of step-down multi-way valve.
5. the step-down multi-way valve according to claim 4 for lorry-mounted crane, it is characterised in that: the operating valve
(2) check valve is additionally provided between the oil return inlet T of actuator port B and step-down multi-way valve.
6. the step-down multi-way valve according to claim 4 for lorry-mounted crane, it is characterised in that: the overflow valve II
It (8) is the direct-acting overflow valve with check valve.
7. the step-down multi-way valve according to claim 1 or 2 for lorry-mounted crane, it is characterised in that: the work
Overflow valve III (9) is equipped between the actuator port A of valve (2) and the oil return inlet T of step-down multi-way valve.
8. the step-down multi-way valve according to claim 7 for lorry-mounted crane, it is characterised in that: the operating valve
(2) check valve is additionally provided between the oil return inlet T of actuator port A and step-down multi-way valve.
9. the step-down multi-way valve according to claim 7 for lorry-mounted crane, it is characterised in that: the overflow valve III
It (9) is the direct-acting overflow valve with check valve.
10. a kind of lower vehicle control using claim 1~9 any one step-down multi-way valve, it is characterised in that: described
Selector valve (4) is connected with support oil cylinder (6) and cross cylinder (7) respectively, and between selector valve (4) and support oil cylinder (6) also
Equipped with bidirectional hydraulic lock (5), support oil cylinder (6) and cross cylinder (7) are also connected with operating valve (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811494534.9A CN109368499A (en) | 2018-12-07 | 2018-12-07 | Step-down multi-way valve and lower vehicle control for lorry-mounted crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811494534.9A CN109368499A (en) | 2018-12-07 | 2018-12-07 | Step-down multi-way valve and lower vehicle control for lorry-mounted crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109368499A true CN109368499A (en) | 2019-02-22 |
Family
ID=65372701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811494534.9A Pending CN109368499A (en) | 2018-12-07 | 2018-12-07 | Step-down multi-way valve and lower vehicle control for lorry-mounted crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109368499A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145507A (en) * | 2019-05-20 | 2019-08-20 | 江苏柳工机械有限公司 | Auxiliary connection hydraulic system |
| CN110550552A (en) * | 2019-10-08 | 2019-12-10 | 三一汽车起重机械有限公司 | Pressure regulating system, crane and pressure regulating method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103953356A (en) * | 2014-04-28 | 2014-07-30 | 北京市三一重机有限公司 | Open type shield machine, support device and control system and control method of support device |
| CN204553384U (en) * | 2015-02-05 | 2015-08-12 | 徐工集团工程机械股份有限公司 | Supporting leg control combination valve, hydraulic system and hoist |
| CN107255091A (en) * | 2017-08-16 | 2017-10-17 | 实用动力(中国)工业有限公司 | A kind of non-differential type truck cap overturning oil cylinder |
| US20190193997A1 (en) * | 2016-06-16 | 2019-06-27 | Komatsu Forest Ab | Hose guiding device for a crane tool |
| CN209177873U (en) * | 2018-12-07 | 2019-07-30 | 徐州徐工随车起重机有限公司 | A kind of step-down multi-way valve and lower vehicle control for lorry-mounted crane |
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2018
- 2018-12-07 CN CN201811494534.9A patent/CN109368499A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953356A (en) * | 2014-04-28 | 2014-07-30 | 北京市三一重机有限公司 | Open type shield machine, support device and control system and control method of support device |
| CN204553384U (en) * | 2015-02-05 | 2015-08-12 | 徐工集团工程机械股份有限公司 | Supporting leg control combination valve, hydraulic system and hoist |
| US20190193997A1 (en) * | 2016-06-16 | 2019-06-27 | Komatsu Forest Ab | Hose guiding device for a crane tool |
| CN107255091A (en) * | 2017-08-16 | 2017-10-17 | 实用动力(中国)工业有限公司 | A kind of non-differential type truck cap overturning oil cylinder |
| CN209177873U (en) * | 2018-12-07 | 2019-07-30 | 徐州徐工随车起重机有限公司 | A kind of step-down multi-way valve and lower vehicle control for lorry-mounted crane |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145507A (en) * | 2019-05-20 | 2019-08-20 | 江苏柳工机械有限公司 | Auxiliary connection hydraulic system |
| CN110550552A (en) * | 2019-10-08 | 2019-12-10 | 三一汽车起重机械有限公司 | Pressure regulating system, crane and pressure regulating method |
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