CN106185737B - It is a kind of to adapt to the hydraulic control system of manipulation of getting on or off the bus for high-altitude operation vehicle - Google Patents
It is a kind of to adapt to the hydraulic control system of manipulation of getting on or off the bus for high-altitude operation vehicle Download PDFInfo
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- CN106185737B CN106185737B CN201610774935.4A CN201610774935A CN106185737B CN 106185737 B CN106185737 B CN 106185737B CN 201610774935 A CN201610774935 A CN 201610774935A CN 106185737 B CN106185737 B CN 106185737B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
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- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor 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
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Get on or off the bus for the high-altitude operation vehicle hydraulic control system of manipulation, including pump group are adapted to the invention discloses a kind of, and connection getting on the bus for executive component of getting on the bus controls multi-way valve, and connection getting off for executive component of getting off controls multi-way valve；Getting off and controlling multi-way valve includes two position three-way valve and supporting leg control valve group；By-pass throttle valve group is realized and is adjusted the speed to the shunting for controlling multi-way valve of getting on the bus；Electromagnetic relief valve is used for system unloaded.The beneficial effects of the present invention are: total system is divided into lower vehicle control and upper vehicle control two parts by two position three way directional control valve by 1., lower vehicle control and upper vehicle control is made to realize interlock function, when get on the bus work when, akinesia of getting off；When get off act when, getting on the bus can not work.2. being respectively arranged a by-pass throttle valve at turntable and workbench using the control mode of by-pass throttle, speed control is carried out to system of getting on the bus when turntable and workbench operate convenient for staff, reduces the control cost of system.
Description
Technical field
The invention belongs to high-altitude operation vehicle technical fields, and in particular to a kind of to adapt to manipulation of getting on or off the bus for high-altitude operation vehicle
Hydraulic control system, especially suitable for low cost folding-jib overhead working truck control system.
Background technique
High-altitude operation vehicle, which refers to, transports staff and using equipment to live and carry out the special-purpose vehicle of aerial work.For
Facilitate staff to use, usually gets on the bus in high-altitude operation vehicle and workbench and get off and be respectively set manipulation device.At present
Some high-altitude operation vehicles are had to be respectively placed in using two pieces of manual multiple-way valves and get off and get on the bus to realize to realize manipulation of getting on or off the bus
It gets on or off the bus manipulation, this scheme is at low cost, but energy consumption is high.Have using electro-hydraulic proportional valve, manipulation of getting on or off the bus realized by electrical control,
This scheme pipeline arrangement is simple, and speed regulation property is good, but higher cost.
A kind of control oil circuit of altitude operating vehicle of patent CN87215075, provide a kind of high altitude vehicle get on or off the bus it is steerable
Hydraulic control system, the system use two groups of manual throttle reversal valves, valve A and valve B.Valve A, which is placed in, to get off, and realizes manipulation of getting off,
Valve B, which is placed in, to get on the bus, and realizes manipulation of getting on the bus.The patent has the advantage that the manipulation that may be implemented to get on or off the bus, and has speed regulation function
Can, and it is at low cost.The patent since valve B is located at workbench of getting on the bus, is got on the bus and manipulates unloading condition there is also certain problem
When, oil flows through valve B from valve A, then flows back to fuel tank by valve B, gets on the bus what workbench was connect with valve A and fuel tank since valve B is located at
Pipeline is longer, and the pressure loss is big, and system energy consumption is high, and use cost is high.
A kind of hydraulic control system of high-altitude operation vehicle of patent CN02263150 passes through ratio hand using electric proportional control
Handle, controller and proportioning valve realize manipulation of getting on or off the bus.The patent has the advantage that is got on or off the bus by electrical control realization
Manipulation, electric proportionality velocity modulation, control precision is high, and pressure unloading is low.The patent is there is also certain problem, due to electric proportional control,
Using ratio handle, the control of amplification board and proportioning valve, realization is at high cost.
Summary of the invention
It is an object of the invention to overcome deficiency in the prior art, provide it is a kind of adaptation get on or off the bus for high-altitude operation vehicle
The hydraulic control system of manipulation has the advantages that low energy consumption, low cost.
To solve prior art problem, the hydraulic of manipulation of getting on or off the bus for high-altitude operation vehicle is adapted to the invention discloses a kind of
Control system, including pump group connect getting on the bus for executive component of getting on the bus and control multi-way valve, and connect getting off for executive component of getting off
Control multi-way valve；Getting off and controlling multi-way valve includes two position three-way valve and supporting leg control valve group, the first oil outlet of two position three-way valve
It being connect with the oil inlet of supporting leg control valve group, the second oil outlet is connect through working connection with the oil inlet for controlling multi-way valve of getting on the bus,
Its oil recirculating port connecting tank；When the upper work of two position three way directional control valve, the pressure oil that pump group exports is transported to get on the bus controls multichannel
Valve is to control executive component of getting on the bus, and when bottom works, the pressure oil that pump group exports is transported to supporting leg control valve group to control
It gets off executive component；Further include:
By-pass throttle valve group connects the realization on to the working connection for controlling multi-way valve fuel feeding of getting on the bus and controls multi-way valve to getting on the bus
Shunt speed regulation；
Electromagnetic relief valve is connected to the second oil outlet and oil return opening of two position three-way valve, is used for system unloaded.
Preferably, it pump group and gets off to control and is connected with high pressure filter between multi-way valve.
It preferably, further include the return filter being arranged on oil return circuit.
Preferably, executive component of getting on the bus includes being connected to the rotation of rotary table got on the bus and controlled on every group of driving mouth of multi-way valve
Circuit, lower arm luffing circuit, upper arm luffing circuit, winch lifting circuit and the flexible circuit of crane arm.
Preferably, rotation of rotary table circuit includes the rotary motor being connected on first group of driving mouth；Lower arm luffing circuit packet
Include the lower arm luffing balanced valve being connected on second group of driving mouth and lower arm luffing hydraulic cylinder；Upper arm luffing circuit includes being connected to
Third group drives the upper arm luffing balanced valve and upper arm luffing hydraulic cylinder on mouth；Winch lifting circuit includes being connected to the 4th group of drive
One-way balance valve and winch motor on opening one's mouth；The flexible circuit of crane arm includes the one-way balance valve being connected on the 5th driving mouth
With crane arm telescopic oil cylinder.
Preferably, executive component of getting off includes the horizontal support legs oil cylinder being connected on every group of driving mouth of supporting leg control valve
And vertical support oil cylinder.
Preferably, one group of driving mouth of supporting leg control valve group big chamber with horizontal support legs oil cylinder and vertical support oil cylinder respectively
Connection, another group of driving mouth are connect with the small chamber of horizontal support legs oil cylinder and vertical support oil cylinder respectively by two-way shut-off valve.
Preferably, it is separately connected on the big chamber of vertical support oil cylinder and the oil circuit of small chamber and is additionally provided with bidirectional hydraulic lock.
Preferably, pump group includes the hydraulic pump and auxiliary pump of offer hydraulic power in parallel.
Preferably, by-pass throttle valve group includes concatenated manual turntable throttle grverning valve and manual platform throttle grverning valve.
The invention has the benefit that
1. can be to avoid maloperation.Individually operated manual throttle speed governing valve is got on the bus when controlling multi-way valve, high-altitude operation vehicle
It gets on the bus attonity；Manual throttle grverning valve is only operated simultaneously and is got on the bus when controlling multi-way valve, and high-altitude operation vehicle is got on the bus just active
Make.It effectively prevents using the maloperation occurred during high-altitude operation vehicle.
2. by the way that manual throttle speed governing valve is arranged at turntable and platform turntable can be separately implemented at and workbench of getting on the bus
The speed control got on the bus to high altitude operation.Control valve of getting on the bus be electromagnetic switch valve group be placed in turning table control cabinet, when get off or on
It is control valve commutation of being got on the bus by electrical control when vehicle manipulates.When control platform of getting off operates, passes through and operate turning table control
The automatically controlled button of control valve of getting on the bus of cabinet controls control valve commutation of getting on the bus, while adjusting the manual turntable section for being located at turning table control cabinet
Speed governing valve openings of sizes is flowed, high-altitude operation vehicle is carried out and gets on the bus movement.When workbench of getting on the bus operates, by operating work of getting on the bus
The automatically controlled button of control valve of getting on the bus of platform, while the manual platform throttle grverning valve openings of sizes for being located at workbench is adjusted, into
Row high-altitude operation vehicle is got on the bus movement.
3. getting on the bus control valve in conjunction with manual throttle speed governing valve using electrical control, has the characteristics that low cost.Wherein
It gets on the bus control valve and manual turntable throttle grverning valve is located at turning table control cabinet, it is flat that manual platform throttle grverning valve is located at work of getting on the bus
Platform reduces the pipeline for workbench of getting on the bus.Furthermore manual throttle adjusts the speed relative scale speed governing valve, low in cost.
4. by get off control valve outlet be arranged unloading electromagnetic valve, shorten oil return line, reduce the pressure loss.When two
After position threeway hand-operated direction valve 6-2 is transformed into and gets on the bus, get on the bus when controlling multi-way valve and not operating, under the oil liquid of hydraulic system can pass through
The direct oil return box of vehicle electromagnetism load releasing valve 18, shortens oil return circuit, reduces the pressure unloading of system, reduce the fever of system.
Detailed description of the invention
Fig. 1 is hydraulic schematic diagram of the invention.
Appended drawing reference:
1 fuel tank；2 return filters；3 hydraulic pumps；4 auxiliary pumps；5 high pressure filters；6, which get off, controls multi-way valve；6-1 bis-
Triple valve；6-2 supporting leg control valve group；7 two-way shut-off valves；8 bidirectional hydraulic locks；9 horizontal support legs oil cylinders；10 vertical support oil cylinders；
The manual turntable throttle grverning valve of 11-1；The manual platform throttle grverning valve of 11-2；12, which get on the bus, controls multi-way valve；13 upper-part rotations return
Road；13-1 rotary motor；14 lower arm luffing circuits；14-1 lower arm luffing balanced valve；14-2 lower arm luffing hydraulic cylinder；15 upper arm become
Width circuit；15-1 upper arm luffing balanced valve；15-2 upper arm luffing hydraulic cylinder；16 winches lift by crane circuit；16-1 one-way balance valve；
16-2 winch motor；17 crane arms stretch circuit；17-1 one-way balance valve；17-2 crane arm telescopic oil cylinder；18 unloading electromagnetic valves.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following embodiment is only used for clearly illustrating the present invention
Technical solution, and not intended to limit the protection scope of the present invention.
As shown in Figure 1, a kind of adapt to the hydraulic control system specific composition of manipulation of getting on or off the bus for high-altitude operation vehicle are as follows: oil
Case 1, return filter 2, hydraulic pump 3, auxiliary pump 4, high pressure filter 5, getting off controls multi-way valve 6, two-way shut-off valve 7, two-way
Hydraulic lock 8, horizontal support legs oil cylinder 9, vertical support oil cylinder 10, manual turntable throttle grverning valve 11-1, manual platform throttle grverning
Valve 11-2, getting on the bus controls multi-way valve 12, upper-part rotation circuit 13, lower arm luffing circuit 14, upper arm luffing circuit 15, winch lifting
Circuit 16 and the flexible circuit 17 of crane arm and electromagnetism load releasing valve 18.
The hydraulic control system provides power by hydraulic pump 3 and/or auxiliary pump 4, pressure oil is transported to by check valve
It gets off and controls multi-way valve 6.
Described getting off controls multi-way valve 6, including two position three way directional control valve 6-1 and supporting leg control valve group 6-2.Two-position three way
First oil outlet of valve is connect with the oil inlet of supporting leg control valve group, and the second oil outlet is through working connection and gets on the bus and controls multi-way valve
Oil inlet connection, oil recirculating port connecting tank.
Hydraulic system is divided into upper vehicle control and lower vehicle control two by the two position three way directional control valve 6-1
Point, so that vehicle control and lower vehicle control is realized interlock function.When the upper work of two position three way directional control valve 6-1, it will press
Power oil is transported to vehicle control, that is, gets on the bus and control multi-way valve and each executive component of getting on the bus；When the work of bottom, by pressure oil
It is transported to lower vehicle control, that is, gets off and controls multi-way valve and each executive component of getting off.
The upper vehicle control, including by-pass throttle valve group, getting on the bus controls multi-way valve 12 and executive component of getting on the bus.
By-pass throttle valve group connects the realization on to the working connection for controlling multi-way valve fuel feeding of getting on the bus and controls multi-way valve to getting on the bus
Shunt speed regulation comprising manual turntable throttle grverning valve 11-1 and manual platform throttle grverning valve 11-2.The manual turntable
Throttle grverning valve 11-1 is located at turning table control cabinet, carries out speed control to system of getting on the bus in turntable convenient for staff.Described
Manual platform throttle grverning valve 11-2 is located at workbench, carries out when workbench is operated to system of getting on the bus convenient for staff
Speed control.
The unloading electromagnetic valve 18 is connected to the second oil outlet and oil return opening of two-bit triplet reversal valve 6-1, when control of getting on the bus
When 12 power loss attonity of multi-way valve processed, 18 power loss of unloading electromagnetic valve, oil liquid passes through the direct oil return box of unloading electromagnetic valve 18.When getting on the bus
Control 12 work once electrified of multi-way valve when, unloading electromagnetic valve 18 it is electric, oil liquid by revolution distributor arrival get on the bus, pass through control hand
The opening degree of turn platform throttle grverning valve 11-1 or manual platform throttle grverning valve 11-2 control multichannel to change into getting on the bus
The flow of valve 12.
Described get on the bus controls multi-way valve 12 and has driving outlet A1 and B1, driving mouth A2 and B2, driving mouth A3 and B3, driving
Mouth A4 and B4, driving mouth A5 and B5.
First group of driving mouth A1 connects rotation of rotary table motor 13-1 with B1, forms above-mentioned rotation of rotary table circuit 13.
Second group of driving mouth A2 connects lower arm luffing balanced valve 14-1 and lower arm luffing hydraulic cylinder 14-2 with B2, forms above-mentioned
Lower arm luffing circuit 14.
Third group driving mouth A3 connects upper arm luffing balanced valve 15-1 and upper arm luffing hydraulic cylinder 15-2 with B3, forms above-mentioned
Upper arm luffing circuit 15.
Winch lifting the 4th group of circuit driving mouth A4 connects one-way balance valve 16-1 and winch motor 16-2 with B4, on composition
State winch lifting circuit 16.
5th group of driving mouth A5 connects one-way balance valve 17-1 and crane arm telescopic oil cylinder 17-2 with B5, forms above-mentioned lifting
Arm stretches circuit 17.
The lower vehicle control, including supporting leg control valve group 6-2 and executive component of getting off.
Supporting leg control valve group 6-2 has multiple groups driving mouth a1 and b1, driving mouth a2 and b2, driving mouth a3 and b3, driving mouth
A4 and b4 and driving mouth H.
Driving mouth a1 and b1, driving mouth a2 and b2, driving mouth a3 and b3 and driving mouth a4 and b4 are separately connected horizontal branch
The big chamber of leg oil cylinder and vertical support oil cylinder, driving mouth H by two-way shut-off valve 7 respectively with horizontal support legs oil cylinder and vertical leg
The small chamber of oil cylinder connects.
When two-way shut-off valve 7 obtains electric, the public oil circuit of the small chamber of support oil cylinder is cut off.When get on the bus work when, if getting off appearance
When maloperation, support oil cylinder oil circuit is locked up, and effectively protects the safety of staff and equipment on high-altitude operation vehicle.
Get on the bus control multi-way valve 12 and the oil return circuit controlled between multi-way valve 6 and fuel tank 1 of getting off on be connected with oil return
Filter 2.
The working principle of the invention and process
When high-altitude operation vehicle drive-through operation, it is operated first two-bit triplet reversal valve 6-1, makes its bottom work, at this time pressure
Oil circuit is communicated with supporting leg control valve 6-2.Landing leg stretching is controlled by supporting leg control valve 6-2.
High-altitude operation vehicle is got on the bus when operating, and is operated first two-bit triplet reversal valve 6-1, is made its upper work, then pass through
Operation get on the bus control the different commutations connection of multi-way valve 12 control rotary loop respectively, lower arm luffing circuit, upper arm luffing return
Road, winch lifting circuit and flexible circuit.When the work for controlling multi-way valve 12 of getting on the bus joins electric, unloading electromagnetic valve 18
Electricity, oil circuit pass through manual turntable throttle grverning valve 11-1, manual platform throttle grverning valve 11-2 and get on the bus and control multi-way valve 12.This
When by manipulator's turn platform throttle grverning valve 11-1 or manual platform throttle grverning valve 11-2, to control into control loop
Flow, reach speed-regulating function.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of adapt to the hydraulic control system of manipulation of getting on or off the bus for high-altitude operation vehicle, including pump group, connection, which is got on the bus, executes member
Getting on the bus for part controls multi-way valve, and connects getting off for executive component of getting off and control multi-way valve；Getting off and controlling multi-way valve includes two
First oil outlet of position three-way valve and supporting leg control valve group, two position three-way valve is connect with the oil inlet of supporting leg control valve group, the
Two oil outlets are connect through working connection with the oil inlet for controlling multi-way valve of getting on the bus, oil recirculating port connecting tank；On two position three way directional control valve
When the work of position, the pressure oil that pump group exports is transported to get on the bus controls multi-way valve to control executive component of getting on the bus, bottom work
When, the pressure oil that pump group exports is transported to supporting leg control valve group to control executive component of getting off；It is characterized by also including:
By-pass throttle valve group connects and realizes on to the working connection for controlling multi-way valve fuel feeding of getting on the bus to the shunting for controlling multi-way valve of getting on the bus
Speed regulation, by-pass throttle valve group includes concatenated manual turntable throttle grverning valve and manual platform throttle grverning valve；
Electromagnetic relief valve is connected to the second oil outlet and oil return opening of two position three-way valve, is used for system unloaded.
2. it is according to claim 1 it is a kind of adapt to the hydraulic control system of manipulation of getting on or off the bus for high-altitude operation vehicle, it is special
Sign is: pump group and getting off to control and is connected with high pressure filter between multi-way valve.
3. it is according to claim 1 it is a kind of adapt to the hydraulic control system of manipulation of getting on or off the bus for high-altitude operation vehicle, it is special
Sign is: further including the return filter being arranged on oil return circuit.
4. it is according to claim 1 it is a kind of adapt to the hydraulic control system of manipulation of getting on or off the bus for high-altitude operation vehicle, it is special
Sign is: executive component of getting on the bus include be connected to the rotation of rotary table circuit got on the bus control on every group of driving mouth of multi-way valve, under
Arm luffing circuit, upper arm luffing circuit, winch lifting circuit and the flexible circuit of crane arm.
5. it is according to claim 4 it is a kind of adapt to the hydraulic control system of manipulation of getting on or off the bus for high-altitude operation vehicle, it is special
Sign is: rotation of rotary table circuit includes the rotary motor being connected on first group of driving mouth；Lower arm luffing circuit includes being connected to
Lower arm luffing balanced valve and lower arm luffing hydraulic cylinder on second group of driving mouth；Upper arm luffing circuit includes being connected to the drive of third group
Upper arm luffing balanced valve and upper arm luffing hydraulic cylinder on opening one's mouth；It includes being connected on the 4th group of driving mouth that winch, which lifts by crane circuit,
One-way balance valve and winch motor；The flexible circuit of crane arm includes the one-way balance valve being connected on the 5th group of driving mouth and lifting
Arm telescopic oil cylinder.
6. it is according to claim 1 it is a kind of adapt to the hydraulic control system of manipulation of getting on or off the bus for high-altitude operation vehicle, it is special
Sign is: executive component of getting off includes the horizontal support legs oil cylinder being connected on every group of driving mouth of supporting leg control valve and vertical branch
Leg oil cylinder.
7. it is according to claim 6 it is a kind of adapt to the hydraulic control system of manipulation of getting on or off the bus for high-altitude operation vehicle, it is special
Sign is: one group of driving mouth of supporting leg control valve group connect with the big chamber of horizontal support legs oil cylinder and vertical support oil cylinder respectively, is another
One group of driving mouth is connect with the small chamber of horizontal support legs oil cylinder and vertical support oil cylinder respectively by two-way shut-off valve.
8. it is according to claim 6 it is a kind of adapt to the hydraulic control system of manipulation of getting on or off the bus for high-altitude operation vehicle, it is special
Sign is: being separately connected on the big chamber of vertical support oil cylinder and the oil circuit of small chamber and is additionally provided with bidirectional hydraulic lock.
9. it is according to claim 1 it is a kind of adapt to the hydraulic control system of manipulation of getting on or off the bus for high-altitude operation vehicle, it is special
Sign is: pump group includes the hydraulic pump and auxiliary pump of offer hydraulic power in parallel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610774935.4A CN106185737B (en) | 2016-08-31 | 2016-08-31 | It is a kind of to adapt to the hydraulic control system of manipulation of getting on or off the bus for high-altitude operation vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610774935.4A CN106185737B (en) | 2016-08-31 | 2016-08-31 | It is a kind of to adapt to the hydraulic control system of manipulation of getting on or off the bus for high-altitude operation vehicle |
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| CN106185737A CN106185737A (en) | 2016-12-07 |
| CN106185737B true CN106185737B (en) | 2019-08-09 |
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| CN109236766B (en) * | 2018-10-10 | 2024-03-26 | 湖北先行专用汽车有限公司 | Hydraulic system of lateral fork lift type wrecker |
| CN109372811B (en) * | 2018-12-07 | 2024-04-05 | 朱浩 | Hydraulic system for overhead working truck |
| CN109973455B (en) * | 2019-03-20 | 2020-08-04 | 中煤科工集团重庆研究院有限公司 | Multistage series-parallel connection accurate speed regulation hydraulic system |
| CN110985464A (en) * | 2019-12-30 | 2020-04-10 | 徐州海伦哲特种车辆有限公司 | Automatic interlocking control system for getting on and off of overhead working truck and control method thereof |
| CN111857007B (en) * | 2020-07-30 | 2021-07-20 | 徐州徐工随车起重机有限公司 | Arm support control circuit suitable for folding arm type overhead working truck |
| CN113803309A (en) * | 2021-09-13 | 2021-12-17 | 徐州徐工随车起重机有限公司 | Energy-saving type high-altitude operation vehicle getting-on and getting-off interlocking system and control method thereof |
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| CN87215075U (en) * | 1987-11-09 | 1988-08-24 | 北京探矿机械厂 | Control oil circuit of altitude operating vehicle |
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| CN101660975A (en) * | 2008-08-28 | 2010-03-03 | 上海宝钢设备检修有限公司 | System for testing fine cooling jet valve of rolling mill |
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| CN206069299U (en) * | 2016-08-31 | 2017-04-05 | 徐州徐工随车起重机有限公司 | A kind of hydraulic control system of the manipulation that adapts to get on or off the bus for high-altitude operation vehicle |
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| CN87215075U (en) * | 1987-11-09 | 1988-08-24 | 北京探矿机械厂 | Control oil circuit of altitude operating vehicle |
| CN2561981Y (en) * | 2002-07-18 | 2003-07-23 | 江苏省机电研究所有限公司 | Hydraulic control system for high altitude operation vehicle |
| CN2591305Y (en) * | 2002-12-10 | 2003-12-10 | 江苏省机电研究所有限公司 | Hydraulic control system for high-altitude operation car |
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| CN106185737A (en) | 2016-12-07 |
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