CN110985464A - Automatic interlocking control system for getting on and off of overhead working truck and control method thereof - Google Patents
Automatic interlocking control system for getting on and off of overhead working truck and control method thereof Download PDFInfo
- Publication number
- CN110985464A CN110985464A CN201911395121.XA CN201911395121A CN110985464A CN 110985464 A CN110985464 A CN 110985464A CN 201911395121 A CN201911395121 A CN 201911395121A CN 110985464 A CN110985464 A CN 110985464A
- Authority
- CN
- China
- Prior art keywords
- valve
- leg
- oil
- vehicle
- getting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 9
- 230000008093 supporting effect Effects 0.000 claims abstract description 100
- 239000003921 oil Substances 0.000 claims description 228
- 230000001960 triggered effect Effects 0.000 claims description 14
- 239000010720 hydraulic oil Substances 0.000 claims description 10
- 230000002457 bidirectional effect Effects 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000001976 improved effect Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Images
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
- 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
- F15B11/20—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members
-
- 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
- B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
- B66F17/006—Safety devices, e.g. for limiting or indicating lifting force for working platforms
-
- 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
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/78—Control of multiple output members
Landscapes
- 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)
Abstract
The invention discloses an automatic interlocking control system for getting on and off a high-altitude operation vehicle and a control method thereof. The system comprises a get-off leg control system and a get-on arm support control system, wherein the get-off leg control system comprises a hydraulic pump, a get-off valve group and a leg oil cylinder; the upper arm support control system comprises an upper valve group, a variable amplitude oil cylinder, a telescopic oil cylinder and a swing mechanism motor; the lower valve group comprises an upper and lower vehicle oil path switching valve, a supporting leg oil cylinder telescopic control valve and a plurality of groups of supporting leg oil cylinder selection valves; the upper valve group comprises a load sensitive port LS electric control unloading valve, a variable amplitude oil cylinder control valve, a telescopic oil cylinder control valve and an arm support rotary control valve. The invention can realize the automatic interlocking control of the loading and unloading of the high-altitude operation vehicle, avoid the condition that the operation personnel can not fall to the ground due to the limitation in the platform, and improve the stability of the high-altitude operation vehicle and the use safety of the high-altitude operation personnel.
Description
Technical Field
The invention relates to the technical field of overhead working trucks, in particular to an automatic interlocking control system for loading and unloading of an overhead working truck and a control method thereof.
Background
When the aerial work platform is used, the aerial work platform is generally divided into a getting-off operation and a getting-on operation, wherein the getting-off operation refers to the telescopic operation of the supporting legs, and the getting-on operation refers to the operations of actions such as lifting, stretching and rotating of the arm support. The overhead working truck needs to carry people to high altitude for operation, so the requirement on the stability of the whole truck is higher, and the safety accident caused by rollover is avoided.
The stability of the upper part is ensured by the hydraulic support legs of the lower part. If the supporting legs are not extended out, the upper vehicle arm support is directly operated to act, the center of gravity of the whole vehicle is possibly deviated, and dangerous accidents such as vehicle turning and the like are possibly caused; in addition, when the support legs are supported, the arm support for getting on the vehicle leaves the arm support, personnel in the working platform perform high-altitude operation, and dangerous accidents such as vehicle overturning and the like can also be caused if the personnel get on the support legs by misoperation.
The Chinese invention with the publication number of CN105288909A discloses an automatic interlocking device with double protection for getting on and off a fire truck, which adopts the technical scheme that: the automatic interlocking of getting on and off the train is realized by utilizing various elements such as a hydraulic pilot unloading valve group, a mechanical interlocking limit plate, a self-resetting cylinder, a sensor and the like. However, the technical scheme has the problems of complex design, high manufacturing cost, difficult assembly and the like; when the landing leg of the lower vehicle has a soft leg fault, the technical scheme not only limits the condition that the arm support of the upper vehicle cannot act and the landing leg of the lower vehicle cannot retract, but also limits the condition that the landing leg of the lower vehicle cannot extend to ensure the stability of the vehicle body, namely all actions of the arm support of the upper vehicle and the landing leg of the lower vehicle cannot be operated, and certain risk potential hazards exist in site rescue.
The Chinese invention with publication number CN201864543U discloses a leg interlocking device for an overhead crane, which adopts the technical scheme that: the inductive proximity switch, the support leg interlocking valve, the support leg signal valve, the adaptive power supply and other elements are used for realizing the support leg interlocking of the overhead crane. The problems existing in the technical scheme are as follows: when the legs for getting off the vehicle are not supported or the legs are soft, all actions of getting off/on the vehicle are limited to be incapable of being operated; however, when the arm support leaves the upper vehicle, the non-recoverable action of the supporting legs is not limited, so that the supporting legs can only be locked without extending to ensure that the arm support does not act, the automatic interlocking function of the upper vehicle and the lower vehicle can not be realized at the same time, and larger danger hidden trouble also exists; in the scheme, when the working vehicle has soft legs, the lower vehicle can not extend the legs to ensure the stability of the vehicle body, and the upper vehicle can not be folded when being in a limited state, so that the problems that the field working road is occupied for a long time, and workers in the platform can not fall back to the ground and the like are caused.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides an automatic interlocking control system for the loading and unloading of an aerial work platform and a control method thereof, so as to realize the automatic interlocking control for the loading and unloading of the aerial work platform, avoid the situation that an operator cannot fall to the ground due to the limitation in a platform, and improve the stability of the aerial work platform and the use safety of the aerial work operator.
In order to achieve the aim, the invention provides an automatic interlocking control system for getting on and off an aerial work platform, which comprises a getting-off support leg control system and a getting-on arm support control system, wherein the getting-off support leg control system comprises a hydraulic pump, a getting-off valve group and a support leg oil cylinder; the upper arm support control system comprises an upper valve group, a variable amplitude oil cylinder, a telescopic oil cylinder and a swing mechanism motor; the lower valve group comprises an upper oil way switching valve, a lower oil way switching valve, a supporting leg oil cylinder telescopic control valve and a plurality of groups of supporting leg oil cylinder selection valves, wherein the upper oil way switching valve and the lower oil way switching valve are used for switching supplied hydraulic oil to enter an upper vehicle arm frame control system or enter a lower vehicle supporting leg control system; the first working oil port of the support oil cylinder telescopic control valve is simultaneously communicated with the rod cavity of each support oil cylinder, and the second working oil port of the support oil cylinder telescopic control valve is simultaneously communicated with each support oil cylinder selection valve; the upper valve group comprises a load sensitive port LS electric control unloading valve, a variable amplitude oil cylinder control valve, a telescopic oil cylinder control valve and a boom rotation control valve, an unloading oil path of the load sensitive port LS electric control unloading valve is simultaneously connected with the variable amplitude oil cylinder control valve, the telescopic oil cylinder control valve and the boom rotation control valve, a three-way flow valve is connected in parallel between an oil inlet path and an oil return path of the upper valve group, and the load sensitive port LS is connected with a control oil port of the three-way flow valve and feeds pressure back to the control oil port of the three-way flow valve.
Furthermore, two working oil ports of the control valve of the variable amplitude oil cylinder are respectively communicated with a rodless cavity and a rod cavity of the variable amplitude oil cylinder; two working oil ports of the telescopic oil cylinder control valve are respectively communicated with a rodless cavity and a rod cavity of the telescopic oil cylinder; two working oil ports of the arm support rotation control valve are respectively communicated with two oil ports of a rotation mechanism motor.
Furthermore, an electromagnetic valve is arranged on an oil path which is communicated with the first working oil port of the telescopic control valve of the supporting leg oil cylinder and the rod cavity of each supporting leg oil cylinder.
Preferably, the solenoid valve is a normally closed two-position two-way solenoid valve.
The supporting leg oil cylinder comprises four groups of vertical supporting leg oil cylinders, an opening A of a first supporting leg oil cylinder selection valve is communicated with a rodless cavity of a first group of vertical supporting leg oil cylinders, an opening A of a second supporting leg oil cylinder selection valve is communicated with a rodless cavity of a second group of vertical supporting leg oil cylinders, an opening A of a third supporting leg oil cylinder selection valve is communicated with a rodless cavity of a third group of vertical supporting leg oil cylinders, and an opening A of a fourth supporting leg oil cylinder selection valve is communicated with a rodless cavity of a fourth group of vertical supporting leg oil cylinders.
The supporting leg oil cylinder also comprises four groups of horizontal supporting leg oil cylinders, a port B of a first supporting leg oil cylinder selection valve is communicated with a rodless cavity of a first group of horizontal supporting leg oil cylinders, a port B of a second supporting leg oil cylinder selection valve is communicated with a rodless cavity of a second group of horizontal supporting leg oil cylinders, a port B of a third supporting leg oil cylinder selection valve is communicated with a rodless cavity of a third group of horizontal supporting leg oil cylinders, and a port B of a fourth supporting leg oil cylinder selection valve is communicated with a rodless cavity of a fourth group of horizontal supporting leg oil cylinders.
Furthermore, two-way hydraulic locks are arranged on the four vertical oil cylinders; a bidirectional balance valve I is arranged on the amplitude-variable oil cylinder; and a bidirectional balance valve II is arranged on the telescopic cylinder.
Preferably, the variable-amplitude oil cylinder control valve, the telescopic oil cylinder control valve and the boom rotation control valve are load-sensitive proportional multi-way reversing valves.
The vertical support leg oil cylinders are all provided with support leg travel switches, and the support leg travel switches are in signal linkage with the load sensitive ports Ls electric control unloading valves; an arm support proximity switch is mounted on the upper arm support and is in signal linkage with an electromagnetic valve of the lower landing leg control system.
A control method of the automatic interlocking control system for the high-altitude operation vehicle to get on and off comprises the following steps:
1) and when the landing leg of getting off the bus is not operated, the bus is automatically locked: the landing leg travel switch on the vertical landing leg oil cylinder does not detect an in-place signal, the electric control unloading valve of the load sensitive port Ls of the upper valve group is not triggered to be in a power-off unloading state, at the moment, even if the upper and lower vehicle oil way switching valve in the lower vehicle valve bank is switched to the upper vehicle arm support control system, because the load sensitive port Ls is in the unloading valve position, therefore, no matter the variable-amplitude oil cylinder control valve, the telescopic oil cylinder control valve and/or the boom rotation control valve of the upper valve group are operated manually or electrically, the pressure oil of the hydraulic pump can be unloaded by the unloading valve position of the load sensitive port Ls electric control unloading valve, so that the variable-amplitude oil cylinder control valve, the telescopic oil cylinder control valve and the boom rotation control valve can not build pressure, therefore, each action of the upper arm support cannot be operated, and the upper arm support can be automatically locked when the lower support leg does not extend out, namely, each action operation cannot be performed by the upper arm support;
2) and unlocking the vehicle after the landing legs of the vehicle get off extend in place: the vertical support leg oil cylinder is triggered to output a signal to an electric control system after extending out of place, the electric control system receives in-place signals of all support leg travel switches and controls a load sensitive port Ls electric control unloading valve of an upper vehicle valve group to be reversed to a left position so as to close an unloading oil way, a lower vehicle oil way switching valve in a lower vehicle valve group is switched to an upper vehicle arm frame control system, pressure oil of a hydraulic pump is conveyed to working oil ports of a variable amplitude oil cylinder control valve, a telescopic oil cylinder control valve and an arm frame rotary control valve through the lower vehicle oil way switching valve, the unloading oil way of the load sensitive port Ls electric control unloading valve is closed, so that the amplitude of the arm frame can be controlled to rise, fall, stretch and rotate by operating each valve group of the upper vehicle arm frame system, and meanwhile, the pressure of the load;
3) when the arm support on the vehicle acts, the supporting leg is automatically locked and taken off the vehicle: when the arm support of the upper vehicle leaves the arm support and then performs each action operation of the upper vehicle, the arm support approach switch on the arm support does not detect a signal in place, and an electromagnetic valve in the landing leg control system of the lower vehicle is in a power-off state; at the moment, even if an oil path switching valve for getting on and off the vehicle in a get-off valve group is switched to get-off, the oil path of the rod cavity of the oil cylinder of the vertical supporting leg is switched off by the electromagnetic valve to be in a closed state, so that when the telescopic control valve of the supporting leg is operated, hydraulic oil in the hydraulic pump cannot enter the rod cavity of each vertical supporting leg through the electromagnetic valve, namely the vertical supporting leg cannot perform leg folding and unfolding operations;
and because the rodless cavities of the vertical supporting leg oil cylinders are respectively communicated with the supporting leg oil cylinders through the supporting leg oil cylinder selection valves, the supporting leg extending operation is not limited when the arm support frame is used for getting on the vehicle, and the leg folding and supporting actions of automatically locking the lower vehicle after the getting on vehicle leaves the arm support frame can be realized;
4) and unlocking and unloading after the upper arm support falls back in place: after the upper arm support falls back to the proper position, an arm support proximity switch on the upper arm support is triggered to output a signal to an electric control system, the electric control system receives the proper position signal of the system arm support proximity switch and controls an electromagnetic valve to be electrified and switched to be in a communicated state, hydraulic oil in a hydraulic pump enters a rod cavity of each vertical supporting leg through the electromagnetic valve, and therefore the lower vehicle is unlocked and released to achieve the actions of extending and retracting the supporting legs of the lower vehicle supporting leg;
5) when the getting-on arm support acts and the getting-off support leg stretches out to be in place, the power is switched off by mistake to realize the self-locking of getting-on and getting-off: when all the landing legs of the lower vehicle extend to positions, the arm support of the upper vehicle leaves the arm support and is performing actions of the arm support of the upper vehicle, if the power supply of the whole vehicle is closed by misoperation, the electromagnetic valve on the landing leg loop of the lower vehicle is in a normally closed valve position after power failure, so that the oil circuit of the support legs is disconnected, and the support legs can not perform support leg actions to realize self-locking of the lower vehicle; the electric control valve of the load sensitive port Ls of the upper valve group is in an unloading valve position when power is lost, and the load sensitive port Ls has no pressure feedback, so that each action of an upper arm support cannot be operated to realize the self-locking of the upper arm;
6) and automatically locking the getting-on vehicle when the getting-off vehicle has soft legs: when the lower vehicle landing leg is completely extended to the position, the upper vehicle arm support is separated from the arm support and the upper vehicle arm support acts, if any one or more of the four vertical landing legs of the lower vehicle have soft leg faults, a corresponding landing leg travel switch on the landing leg with the soft leg is not triggered and outputs no signal, an electric control system controls an upper vehicle valve group head piece load sensitive port Ls electric control valve to lose power and unload, and all the actions of the upper vehicle are limited and cannot be operated;
and then switching an upper and lower vehicle oil path switching valve of the lower vehicle valve group to a lower vehicle supporting leg control system, continuing to operate the vertical supporting leg of the soft leg to extend the vertical supporting leg until the vertical supporting leg extends to the head, triggering the supporting leg travel switch again to output a signal, temporarily solving the soft leg fault, switching the upper and lower vehicle oil path switching valve to the upper vehicle arm frame control system and timely withdrawing the upper vehicle arm frame, switching the upper and lower vehicle oil path switching valve to the lower vehicle supporting leg control system to withdraw each supporting leg, and timely checking and solving the soft leg fault.
The invention provides an automatic interlocking control system and a control method for getting on and off an aerial work vehicle, which can realize that the aerial work vehicle can automatically lock the getting on vehicle when the supporting legs are not supported or any one or more supporting legs in the supporting legs are soft, so that the actions of an arm frame of the getting on vehicle can not be operated; when the arm support for loading the automobile leaves the arm support for loading the automobile, the arm support can be automatically locked and the arm support for unloading the automobile can not be folded and supported; when the arm support of the upper vehicle is separated from the arm support and the arm support is operated, if the vertical supporting leg has a soft leg fault, the oil way can be switched to the lower vehicle to continue extending the vertical supporting leg to the position to remove the soft leg fault, and the arm support and the supporting leg are withdrawn in time, so that the situation that an operator cannot fall to the ground due to limitation in a platform is avoided; the automatic interlocking function of getting on and off the vehicle is still effective even under the condition that the power supply is turned off by misoperation, the use safety of high-altitude operation personnel is improved, and the automatic interlocking device has good practical value.
Drawings
FIG. 1 is a hydraulic schematic diagram of an automatic interlocking control system for getting on and off an aerial work platform without horizontal support legs according to the present invention;
FIG. 2 is a hydraulic schematic diagram of an automatic interlocking control system for getting on and off the aerial cage with horizontal support legs.
In the figure: 1. a hydraulic pump; 2. an electromagnetic valve; 3. a vertical leg cylinder; 4. a bidirectional hydraulic lock; 5. a horizontal support oil cylinder; 6. a bidirectional balance valve I; 7. a variable amplitude oil cylinder; 8. a bidirectional balance valve II; 9. a telescopic oil cylinder; 10. a swing mechanism motor; 20. a get-off valve group; 201. an overflow valve; 202. an oil path switching valve for getting on and off the vehicle; 203. a support leg telescopic control valve; 204. a first support leg oil cylinder selection valve; 205. a second support leg oil cylinder selection valve; 206. a third support leg oil cylinder selection valve; 207. a fourth supporting leg oil cylinder selection valve; 30. a boarding valve group; 301. a load sensitive port LS electric control unloading valve; 302. a three-way flow valve; 303. a variable amplitude oil cylinder control valve; 304. a telescopic oil cylinder control valve; 305. and a boom rotation control valve.
Detailed Description
The technical solution of the present invention is explained in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 and 2, an automatic interlocking control system for getting on and off of an aerial work platform comprises a getting-off leg control system and a getting-on arm support control system, wherein the getting-off leg control system comprises a hydraulic pump 1, a getting-off valve group 20 and a leg oil cylinder; the getting-on arm support control system comprises a getting-on valve group 30, a variable amplitude oil cylinder 7, a telescopic oil cylinder 9 and a swing mechanism motor 10; the get-on and get-off valve group 20 comprises an get-on and get-off oil way switching valve 202, a supporting leg oil cylinder telescopic control valve 203 and a plurality of groups of supporting leg oil cylinder selection valves, wherein the get-on and get-off oil way switching valve 202 is used for switching supplied hydraulic oil to enter an get-on arm support control system or an get-off supporting leg control system; a first working oil port of the supporting leg oil cylinder telescopic control valve 203 is simultaneously communicated with a rod cavity of each supporting leg oil cylinder, and a second working oil port of the supporting leg oil cylinder telescopic control valve 203 is simultaneously communicated with each supporting leg oil cylinder selection valve; the get-on valve group 30 comprises a load sensitive port LS electric control unloading valve 301, a luffing cylinder control valve 303, a telescopic cylinder control valve 304 and an arm support rotary control valve 305, an unloading oil path of the load sensitive port LS electric control unloading valve 301 is simultaneously connected with the luffing cylinder control valve 303, the telescopic cylinder control valve 304 and the arm support rotary control valve 305, a three-way flow valve 302 is connected in parallel between an oil inlet path and an oil return path of the get-on valve group 30, and the load sensitive port LS is connected with a control oil port of the three-way flow valve 302 and feeds pressure back to a control oil port of the three-way flow valve 302.
The load sensing port LS electric control unloading valve 301 is used for carrying out electric control unloading on the pressure of the load sensing port LS; the three-way flow valve 302 is controlled by the pressure of the load sensing port Ls to perform reversing to hydraulically unload the system pressure oil. Two working oil ports of the variable amplitude oil cylinder control valve 303 are respectively communicated with a rodless cavity and a rod cavity of the variable amplitude oil cylinder 7; two working oil ports of the telescopic oil cylinder control valve 304 are respectively communicated with a rodless cavity and a rod cavity of the telescopic oil cylinder 9; two working oil ports of the boom rotation control valve 304 are respectively communicated with two oil ports of the rotation mechanism motor 10.
And the electromagnetic valve 2 is arranged on an oil path for communicating the first working oil port of the support oil cylinder telescopic control valve 203 with the rod cavity of each support oil cylinder.
Preferably, the solenoid valve 2 is a normally closed two-position two-way solenoid valve.
As shown in fig. 1, the leg cylinders include four sets of vertical leg cylinders 3, the port a1 of the first leg cylinder selection valve 204 is communicated with the rodless cavity of the first set of vertical leg cylinders 3, the port a2 of the second leg cylinder selection valve 205 is communicated with the rodless cavity of the second set of vertical leg cylinders 3, the port A3 of the third leg cylinder selection valve 206 is communicated with the rodless cavity of the third set of vertical leg cylinders 3, and the port a4 of the fourth leg cylinder selection valve 207 is communicated with the rodless cavity of the fourth set of vertical leg cylinders 3.
When the high-altitude operation vehicle meets the stability requirement and does not need to be provided with horizontal support legs, the support leg oil cylinders can be only four groups of vertical support leg oil cylinders 3, and at the moment, the port B1 of the first support leg oil cylinder selection valve 204, the port B2 of the second support leg oil cylinder selection valve 205, the port B3 of the third support leg oil cylinder selection valve 206 and the port B4 of the fourth support leg oil cylinder selection valve 207 are blocked.
When the stability of the aerial work platform is insufficient and horizontal support legs need to be arranged, as shown in fig. 2, the support leg oil cylinders may further include four groups of horizontal support leg oil cylinders 5, a port B1 of a first support leg oil cylinder selection valve 204 is communicated with a rodless cavity of the first group of horizontal support leg oil cylinders 5, a port B2 of a second support leg oil cylinder selection valve 205 is communicated with a rodless cavity of the second group of horizontal support leg oil cylinders 5, a port B3 of a third support leg oil cylinder selection valve 206 is communicated with a rodless cavity of the third group of horizontal support leg oil cylinders 5, and a port B4 of a fourth support leg oil cylinder selection valve 207 is communicated with a rodless cavity of the fourth group of.
And the four vertical oil cylinders 3 are provided with two-way hydraulic locks 4.
The amplitude variation oil cylinder 7 is provided with a bidirectional balance valve I6; the telescopic cylinder 303 is provided with a bidirectional balance valve II 8.
The load sensing port LS electronic control unloading valve 301 is a normally open two-position two-way electromagnetic valve. Therefore, when the load sensitive port LS electronic control unloading valve 301 is not powered on, even if the upper and lower oil path switching valve 202 is switched to the upper boom control system, the hydraulic oil input into the upper boom control system by the hydraulic pump 1 is unloaded through the load sensitive port LS electronic control unloading valve 301, and the upper boom cannot be driven to move.
Preferably, the luffing cylinder control valve 303, the telescopic cylinder control valve 304 and the boom rotation control valve 305 are load-sensitive proportional multi-way reversing valves. Alternatively, a manual multi-way valve or a solenoid valve can be arranged.
The load pressure ports of the luffing cylinder control valve 303, the telescopic cylinder control valve 304 and the boom rotation control valve 305 are simultaneously communicated with the load sensing port Ls.
And the vertical supporting leg oil cylinders 3 are all provided with supporting leg travel switches, and the supporting leg travel switches are in signal linkage with the load sensitive ports Ls electric control unloading valve 301.
An arm support proximity switch is installed on the upper arm support and is in signal linkage with an electromagnetic valve 2 of the lower landing leg control system.
An overflow valve 201 is connected in parallel between an oil inlet path and an oil return path of the lower vehicle landing leg control system. The relief valve 201 acts as a relief valve to limit the maximum pressure of the entire vehicle system.
An automatic interlocking control method for getting on and off a high-altitude operation vehicle comprises the following steps:
1) and when the landing leg of getting off the bus is not operated, the bus is automatically locked: the landing leg travel switch on the vertical landing leg oil cylinder 3 does not detect a position signal, and the load sensitive port Ls electronic control unloading valve 301 of the upper valve group 20 is not triggered to be in a power-off unloading state, at this time, even if the lower and middle oil circuit switching valve 202 of the lower valve group 20 is switched to the upper boom control system, because the load sensitive port Ls electronic control unloading valve 301 is in an unloading valve position, no matter the amplitude cylinder control valve 303, the telescopic cylinder control valve 304 and/or the boom rotation control valve 305 of the upper valve group 30 are manually or electrically operated, pressure oil of the hydraulic pump 1 can be unloaded from the unloading valve position of the load sensitive port Ls electronic control unloading valve 301, so that the amplitude cylinder control valve 303, the telescopic cylinder control valve 304 and the boom rotation control valve 305 cannot build pressure, and thus each action of the upper boom cannot be operated, thereby realizing that the upper boom can be automatically locked when the landing leg is not extended, namely, the getting-on arm support cannot perform each action operation;
2) and unlocking the vehicle after the landing legs of the vehicle get off extend in place: the vertical supporting leg oil cylinder 3 is triggered to output a signal to an electric control system after extending out of place, the electric control system receives the in-place signals of all the supporting leg travel switches and controls a load sensitive port Ls electric control unloading valve 301 of an upper vehicle valve group 30 to be reversed to a left position so as to close an unloading oil way, a middle and lower vehicle oil way switching valve 202 of a lower vehicle valve group 20 is switched to an upper vehicle arm frame control system, pressure oil of a hydraulic pump 1 is conveyed to working oil ports of a variable amplitude oil cylinder control valve 303, a telescopic oil cylinder control valve 304 and an arm frame rotary control valve 305 through the lower vehicle oil way switching valve 202, because the unloading oil way of the load sensitive port Ls electrically controlled unloading valve 301 is closed, the amplitude variation rising, falling, stretching and rotating actions of the arm support can be controlled by operating each valve bank of the upper arm support system, meanwhile, the pressure of the load sensing port Ls is fed back to a control port of the three-way flow valve 302 to build pressure, and then the upper arm support can be operated to perform each action;
3) when the arm support on the vehicle acts, the supporting leg is automatically locked and taken off the vehicle: when the arm support of the upper vehicle leaves the arm support and then performs each action operation of the upper vehicle, the arm support approach switch on the arm support does not detect a signal in place, and the electromagnetic valve 2 in the leg control system of the lower vehicle is in a power-off state; at this time, even if the get-on/off oil path switching valve 202 in the get-off valve group 20 is switched to get-off, since the oil path of the rod chamber of the vertical leg oil cylinder 3 is disconnected by the electromagnetic valve 2 and is in a closed state, when the leg extension control valve 203 is operated, the hydraulic oil in the hydraulic pump 1 cannot enter the rod chamber of each vertical leg through the electromagnetic valve 2, that is, the vertical leg cannot perform leg retraction operation;
and because the rodless cavity of each vertical supporting leg oil cylinder 3 is in a communicated state with the corresponding part through each supporting leg oil cylinder selection valve, the supporting leg extending operation can be not limited when the arm support frame is used for getting on the vehicle, and the leg folding and supporting actions of automatically locking the lower vehicle after the getting on vehicle leaves the arm support frame can be realized;
4) and unlocking and unloading after the upper arm support falls back in place: after the upper vehicle arm support falls back to the proper position, an arm support proximity switch on the upper vehicle arm support is triggered to output a signal to an electric control system, the electric control system receives the proper position signal of the system arm support proximity switch and then controls an electromagnetic valve 2 to be in an electric reversing state, hydraulic oil in a hydraulic pump 1 can enter a rod cavity of each vertical supporting leg through the electromagnetic valve 2, and therefore the lower vehicle is unlocked to achieve the actions of extending and retracting the supporting legs of the lower vehicle supporting leg;
5) when the getting-on arm support acts and the getting-off support leg stretches out to be in place, the power is switched off by mistake to realize the self-locking of getting-on and getting-off: when all the landing legs of the lower vehicle extend to positions, the arm support of the upper vehicle leaves the arm support and is performing actions of the arm support of the upper vehicle, if the power supply of the whole vehicle is closed by misoperation, the electromagnetic valve 2 on the landing leg loop of the lower vehicle is in a normally closed valve position after power failure, so that the oil circuit of the support legs is disconnected, and the support legs can not perform actions to realize self-locking of the lower vehicle; the electric control valve 301 of the load sensitive port Ls of the getting-on valve group 30 is in an unloading valve position when power is lost, and the load sensitive port Ls has no pressure feedback, so that each action of the getting-on arm support cannot be operated to realize the self-locking of getting-on;
6) and automatically locking the getting-on vehicle when the getting-off vehicle has soft legs: when the lower vehicle landing leg is completely extended to the position, the upper vehicle arm support is separated from the arm support and the upper vehicle arm support acts, if any one or more of the four vertical landing legs 3 of the lower vehicle have soft leg faults, a corresponding landing leg travel switch on the landing leg with the soft leg is not triggered and outputs no signal, an electric control system controls a first load sensitive port Ls electric control valve 301 of an upper vehicle valve group 30 to lose power and unload, and all the actions of the upper vehicle are limited and cannot be operated;
then, the get-on and get-off oil path switching valve 202 of the get-off valve group 20 is switched to the get-off leg control system, the vertical leg of the soft leg is continuously operated to extend the vertical leg until the vertical leg extends to the head, the leg travel switch is triggered again to output a signal, the soft leg fault is temporarily solved, then the get-on and get-off oil path switching valve 202 is switched to the get-on arm support control system and the get-on arm support is withdrawn in time, then the get-on and get-off oil path switching valve 202 is switched to the get-off leg control system and the legs are withdrawn, and the soft leg fault is checked and solved in time.
Claims (10)
1. An automatic interlocking control system for getting on and off of an overhead working truck comprises a getting-off support leg control system and a getting-on arm support control system, wherein the getting-off support leg control system comprises a hydraulic pump (1), a getting-off valve group (20) and a support leg oil cylinder; the getting-on arm support control system comprises a getting-on valve group (30), a variable amplitude oil cylinder (7), a telescopic oil cylinder (9) and a swing mechanism motor (10); the hydraulic control system is characterized in that the get-off valve group (20) comprises an get-on and get-off oil path switching valve (202), a supporting leg oil cylinder telescopic control valve (203) and a plurality of groups of supporting leg oil cylinder selection valves, wherein the get-on and get-off oil path switching valve (202) is used for switching supplied hydraulic oil to enter an get-on arm support control system or an get-off supporting leg control system; a first working oil port of the supporting leg oil cylinder telescopic control valve (203) is simultaneously communicated with a rod cavity of each supporting leg oil cylinder, and a second working oil port of the supporting leg oil cylinder telescopic control valve (203) is simultaneously communicated with each supporting leg oil cylinder selection valve; the get-on valve group (30) comprises a load sensitive port LS electric control unloading valve (301), a variable amplitude oil cylinder control valve (303), a telescopic oil cylinder control valve (304) and an arm support rotary control valve (305), an unloading oil path of the load sensitive port LS electric control unloading valve (301) is connected with the variable amplitude oil cylinder control valve (303), the telescopic oil cylinder control valve (304) and the arm support rotary control valve (305) at the same time, a three-way flow valve (302) is connected in parallel between an oil inlet path and an oil return path of the get-on valve group (30), and the load sensitive port LS is connected with a control oil port of the three-way flow valve (302) and feeds pressure back to a control oil port of the three-way flow valve (302.
2. The automatic interlocking control system for getting on and off the high-altitude operation vehicle as claimed in claim 1, wherein two working oil ports of the variable amplitude cylinder control valve (303) are respectively communicated with a rodless cavity and a rod cavity of the variable amplitude cylinder (7); two working oil ports of the telescopic oil cylinder control valve (304) are respectively communicated with a rodless cavity and a rod cavity of the telescopic oil cylinder (9); two working oil ports of the arm support rotation control valve (304) are respectively communicated with two oil ports of a rotation mechanism motor (10).
3. The automatic interlocking control system for getting on and off the overhead working truck as claimed in claim 1, wherein the solenoid valve (2) is arranged on an oil path of the first working oil port of the support oil cylinder telescopic control valve (203) communicated with the rod cavity of each support oil cylinder.
4. The automatic interlocking control system for getting on and off the high-altitude operation vehicle as claimed in claim 3, wherein the solenoid valve (2) is a normally closed two-position two-way solenoid valve.
5. The automatic interlocking control system for getting on and off the high-altitude operation vehicle as claimed in claim 1, wherein the leg cylinders comprise four sets of vertical leg cylinders (3), the port a1 of the first leg cylinder selection valve (204) is communicated with the rodless cavity of the first set of vertical leg cylinders (3), the port a2 of the second leg cylinder selection valve (205) is communicated with the rodless cavity of the second set of vertical leg cylinders (3), the port A3 of the third leg cylinder selection valve (206) is communicated with the rodless cavity of the third set of vertical leg cylinders (3), and the port a4 of the fourth leg cylinder selection valve (207) is communicated with the rodless cavity of the fourth set of vertical leg cylinders (3).
6. The automatic interlocking control system for getting on and off the high-altitude operation vehicle as claimed in claim 5, wherein the leg cylinders further comprise four groups of horizontal leg cylinders (5), the port B1 of the first leg cylinder selection valve (204) is communicated with the rodless cavity of the first group of horizontal leg cylinders (5), the port B2 of the second leg cylinder selection valve (205) is communicated with the rodless cavity of the second group of horizontal leg cylinders (5), the port B3 of the third leg cylinder selection valve (206) is communicated with the rodless cavity of the third group of horizontal leg cylinders (5), and the port B4 of the fourth leg cylinder selection valve (207) is communicated with the rodless cavity of the fourth group of horizontal leg cylinders (5).
7. The automatic interlocking control system for the getting on and off of the high-altitude operation vehicle as claimed in claim 5, wherein the four vertical oil cylinders (3) are provided with two-way hydraulic locks (4); a bidirectional balance valve I (6) is arranged on the amplitude variation oil cylinder (7); the telescopic cylinder (303) is provided with a bidirectional balance valve II (8).
8. The automatic interlocking control system for getting on and off the high-altitude operation vehicle as claimed in claim 1, wherein the luffing cylinder control valve (303), the telescopic cylinder control valve (304) and the boom rotation control valve (305) are load-sensitive proportional multi-way directional valves.
9. The automatic interlocking control system for the getting on and off of the high-altitude operation vehicle as claimed in any one of claims 1 to 8, characterized in that the vertical leg cylinders (3) are respectively provided with a leg travel switch, and the leg travel switches are linked with the electric control unloading valve (301) of the load sensitive port Ls through signals; an arm support proximity switch is mounted on the upper arm support and is in signal linkage with an electromagnetic valve (2) of the lower landing leg control system.
10. A control method using the automatic interlocking control system for getting on and off the high-altitude operation vehicle as claimed in any one of claims 1 to 9, characterized by comprising the steps of:
1) and when the landing leg of getting off the bus is not operated, the bus is automatically locked: the landing leg travel switch on the vertical landing leg oil cylinder (3) does not detect a position in-place signal, the Ls electric control unloading valve (301) of the load sensitive port of the upper truck valve group (20) is not triggered to be in a power-off unloading state, at the moment, even if the switching valve (202) of the upper and lower truck oil passages of the lower truck valve group (20) is switched to the upper truck arm support control system, because the Ls electric control unloading valve (301) of the load sensitive port is in an unloading valve position, no matter the amplitude cylinder control valve (303), the telescopic cylinder control valve (304) and/or the arm support rotary control valve (305) of the upper truck valve group (30) are manually or electrically operated, pressure oil of the hydraulic pump (1) can be unloaded by the unloading valve position of the Ls electric control unloading valve (301) of the load sensitive port, so that the amplitude cylinder control valve (303), the telescopic cylinder control valve (304) and the arm support rotary control valve (305) cannot build pressure, and each action, therefore, the purpose that the upper vehicle is automatically locked when the support legs of the lower vehicle do not extend out is achieved, namely, the upper vehicle arm support cannot perform various action operations;
2) and unlocking the vehicle after the landing legs of the vehicle get off extend in place: the vertical supporting leg oil cylinder (3) is triggered to output a signal to an electric control system after extending out of place, the electric control system receives the in-place signals of all supporting leg travel switches and controls a load sensitive port Ls electric control unloading valve (301) of an upper truck valve group (30) to be reversed to the left position so as to close an unloading oil way of the load sensitive port Ls, an upper truck oil way switching valve (202) and a lower truck oil way switching valve (202) of a lower truck valve group (20) are switched to an upper truck arm frame control system, pressure oil of a hydraulic pump (1) is conveyed to working oil ports of a variable amplitude oil cylinder control valve (303), a telescopic oil cylinder control valve (304) and an arm frame rotary control valve (305) through the lower truck oil way switching valve (202), because the unloading oil way of the load sensitive port Ls electric control unloading valve (301) is closed, variable amplitude lifting, telescopic movement and rotary movement of an arm frame can be controlled by operating each upper truck arm frame valve group, and meanwhile, the, the arm support of the upper vehicle can be operated to move;
3) when the arm support on the vehicle acts, the supporting leg is automatically locked and taken off the vehicle: when the arm support of the upper vehicle leaves the arm support and then performs each action operation of the upper vehicle, the arm support approach switch on the arm support does not detect a signal in place, and an electromagnetic valve (2) in the leg control system of the lower vehicle is in a power-off state; at the moment, even if an oil path switching valve (202) for getting on and off the vehicle in a get-off valve group (20) is switched to get off the vehicle, since the oil path of the rod cavity of the vertical support leg oil cylinder (3) is disconnected by the electromagnetic valve (2) and is in a closed state, when the support leg telescopic control valve (203) is operated, hydraulic oil in the hydraulic pump (1) cannot enter the rod cavity of each vertical support leg through the electromagnetic valve (2), namely the vertical support leg cannot perform leg folding and unfolding operations;
because the rodless cavities of the vertical supporting leg oil cylinders (3) are respectively communicated with the supporting leg oil cylinder selection valves through the supporting leg oil cylinder selection valves, the supporting leg extending operation is not limited when the arm support of the upper vehicle moves, and the leg retracting and supporting actions of the lower vehicle can be automatically locked after the upper vehicle leaves the arm support;
4) and unlocking and unloading after the upper arm support falls back in place: after the upper arm support falls back to the proper position, an arm support proximity switch on the upper arm support is triggered to output a signal to an electric control system, the electric control system receives the proper position signal of the system arm support proximity switch and then controls an electromagnetic valve (2) to be in an electric reversing state, hydraulic oil in a hydraulic pump (1) enters a rod cavity of each vertical supporting leg through the electromagnetic valve (2), and therefore the lower vehicle is unlocked and released to achieve the actions of extending and retracting the supporting legs of the lower vehicle supporting leg;
5) when the getting-on arm support acts and the getting-off support leg stretches out to be in place, the power is switched off by mistake to realize the self-locking of getting-on and getting-off: when all the landing legs of the lower vehicle extend to positions, the arm support of the upper vehicle leaves the arm support and is performing actions of the arm support of the upper vehicle, if the power supply of the whole vehicle is closed by misoperation, an electromagnetic valve (2) on a loop of the landing legs of the lower vehicle loses power and is in a normally closed valve position, so that an oil circuit of the support legs is disconnected, and the support legs can not perform actions to realize self-locking of the lower vehicle; the electric control valve (301) of the load sensitive port Ls of the getting-on valve group (30) is in an unloading valve position when power is lost, and the load sensitive port Ls has no pressure feedback, so that each action of the getting-on arm support cannot be operated to realize the self-locking of the getting-on arm;
6) and automatically locking the getting-on vehicle when the getting-off vehicle has soft legs: when the lower vehicle supporting legs all extend to the positions, the upper vehicle arm support is separated from the arm support and the upper vehicle arm support acts, if any one or more of the four vertical supporting legs (3) of the lower vehicle have soft leg faults, corresponding supporting leg travel switches on the supporting legs with the soft legs are not triggered and output without signals, an electric control system controls a head piece load sensitive port Ls electric control valve (301) of an upper vehicle valve group (30) to lose power and unload, and all the actions of the upper vehicle are limited and cannot be operated;
and then an on-off oil path switching valve (202) of the off-board valve group (20) is switched to an off-board support leg control system, the vertical support leg of the soft leg is continuously operated to extend the vertical support leg until the vertical support leg extends to the head, the support leg travel switch is triggered again to output a signal, the soft leg fault is temporarily solved, the on-off oil path switching valve (202) is switched to the on-board arm frame control system and the on-board arm frame is timely retracted, the on-off oil path switching valve (202) is switched to the off-board support leg control system to retract all the support legs, and the soft leg fault is timely checked and solved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911395121.XA CN110985464B (en) | 2019-12-30 | 2019-12-30 | Automatic interlocking control system for getting on and off overhead working truck and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911395121.XA CN110985464B (en) | 2019-12-30 | 2019-12-30 | Automatic interlocking control system for getting on and off overhead working truck and control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110985464A true CN110985464A (en) | 2020-04-10 |
| CN110985464B CN110985464B (en) | 2024-07-23 |
Family
ID=70078930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911395121.XA Active CN110985464B (en) | 2019-12-30 | 2019-12-30 | Automatic interlocking control system for getting on and off overhead working truck and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110985464B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114135537A (en) * | 2021-10-14 | 2022-03-04 | 湖南中联重科智能高空作业机械有限公司 | Oil cylinder assembly and aerial work machine |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2527545Y (en) * | 2002-01-26 | 2002-12-25 | 江苏省机电研究所 | High-altitude operation car getting-on-off interlocking safety device |
| WO2011162179A1 (en) * | 2010-06-22 | 2011-12-29 | 日立建機株式会社 | Hydraulic control device for working vehicle |
| CN102371956A (en) * | 2011-10-20 | 2012-03-14 | 徐州重型机械有限公司 | Compound action hydraulic control system and wheeled construction machinery applying same |
| CN103010976A (en) * | 2012-12-17 | 2013-04-03 | 中联重科股份有限公司 | Hydraulic system for controlling oil cylinders to sequentially stretch, horizontal supporting leg system and engineering machinery |
| CN104564867A (en) * | 2014-12-26 | 2015-04-29 | 徐州海伦哲专用车辆股份有限公司 | Hydraulic system of aerial operation truck with two folding booms |
| CN204454483U (en) * | 2015-01-20 | 2015-07-08 | 徐州重型机械有限公司 | A kind of high-altitude operation platform hydraulic control system of landing legs |
| CN105465072A (en) * | 2015-12-22 | 2016-04-06 | 武汉船用机械有限责任公司 | Double-cylinder control system |
| CN106122157A (en) * | 2016-08-31 | 2016-11-16 | 徐州徐工随车起重机有限公司 | A kind of hydraulic control system of the high-altitude operation vehicle of ratio throttle grverning |
| CN106151148A (en) * | 2016-08-31 | 2016-11-23 | 徐州徐工随车起重机有限公司 | A kind of hydraulic control system of folding-jib high-altitude operation vehicle |
| CN106185737A (en) * | 2016-08-31 | 2016-12-07 | 徐州徐工随车起重机有限公司 | A kind of adapt to for high-altitude operation vehicle get on or off the bus handle hydraulic control system |
| CN107435665A (en) * | 2017-06-15 | 2017-12-05 | 河南卫华特种车辆有限公司 | High-altitude system watt car and its electric proportional hydraulic system |
| WO2018119972A1 (en) * | 2016-12-30 | 2018-07-05 | 徐州重型机械有限公司 | Crane hydraulic control system and crane |
| CN109372811A (en) * | 2018-12-07 | 2019-02-22 | 朱浩 | A kind of hydraulic system for high-altitude operation vehicle |
| CN110030217A (en) * | 2019-04-10 | 2019-07-19 | 湖南星邦重工有限公司 | A kind of control system and high-altitude operation vehicle of high altitude operation body frame floating cylinder |
| CN211623854U (en) * | 2019-12-30 | 2020-10-02 | 徐州海伦哲特种车辆有限公司 | Automatic interlocking control system for getting on and off high-altitude operation vehicle |
-
2019
- 2019-12-30 CN CN201911395121.XA patent/CN110985464B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2527545Y (en) * | 2002-01-26 | 2002-12-25 | 江苏省机电研究所 | High-altitude operation car getting-on-off interlocking safety device |
| WO2011162179A1 (en) * | 2010-06-22 | 2011-12-29 | 日立建機株式会社 | Hydraulic control device for working vehicle |
| CN102371956A (en) * | 2011-10-20 | 2012-03-14 | 徐州重型机械有限公司 | Compound action hydraulic control system and wheeled construction machinery applying same |
| CN103010976A (en) * | 2012-12-17 | 2013-04-03 | 中联重科股份有限公司 | Hydraulic system for controlling oil cylinders to sequentially stretch, horizontal supporting leg system and engineering machinery |
| CN104564867A (en) * | 2014-12-26 | 2015-04-29 | 徐州海伦哲专用车辆股份有限公司 | Hydraulic system of aerial operation truck with two folding booms |
| CN204454483U (en) * | 2015-01-20 | 2015-07-08 | 徐州重型机械有限公司 | A kind of high-altitude operation platform hydraulic control system of landing legs |
| CN105465072A (en) * | 2015-12-22 | 2016-04-06 | 武汉船用机械有限责任公司 | Double-cylinder control system |
| CN106122157A (en) * | 2016-08-31 | 2016-11-16 | 徐州徐工随车起重机有限公司 | A kind of hydraulic control system of the high-altitude operation vehicle of ratio throttle grverning |
| CN106151148A (en) * | 2016-08-31 | 2016-11-23 | 徐州徐工随车起重机有限公司 | A kind of hydraulic control system of folding-jib high-altitude operation vehicle |
| CN106185737A (en) * | 2016-08-31 | 2016-12-07 | 徐州徐工随车起重机有限公司 | A kind of adapt to for high-altitude operation vehicle get on or off the bus handle hydraulic control system |
| WO2018119972A1 (en) * | 2016-12-30 | 2018-07-05 | 徐州重型机械有限公司 | Crane hydraulic control system and crane |
| CN107435665A (en) * | 2017-06-15 | 2017-12-05 | 河南卫华特种车辆有限公司 | High-altitude system watt car and its electric proportional hydraulic system |
| CN109372811A (en) * | 2018-12-07 | 2019-02-22 | 朱浩 | A kind of hydraulic system for high-altitude operation vehicle |
| CN110030217A (en) * | 2019-04-10 | 2019-07-19 | 湖南星邦重工有限公司 | A kind of control system and high-altitude operation vehicle of high altitude operation body frame floating cylinder |
| CN211623854U (en) * | 2019-12-30 | 2020-10-02 | 徐州海伦哲特种车辆有限公司 | Automatic interlocking control system for getting on and off high-altitude operation vehicle |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN114135537A (en) * | 2021-10-14 | 2022-03-04 | 湖南中联重科智能高空作业机械有限公司 | Oil cylinder assembly and aerial work machine |
| CN114135537B (en) * | 2021-10-14 | 2024-02-20 | 湖南中联重科智能高空作业机械有限公司 | Oil cylinder assembly and high-altitude operation machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110985464B (en) | 2024-07-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211623854U (en) | Automatic interlocking control system for getting on and off high-altitude operation vehicle | |
| CN107572432B (en) | Self-balancing system of crawler crane | |
| CN110985464B (en) | Automatic interlocking control system for getting on and off overhead working truck and control method thereof | |
| JPH07125985A (en) | Operation control method and device for reach tower crane | |
| CN109372811B (en) | Hydraulic system for overhead working truck | |
| US12049393B2 (en) | Floating device for aerial work platform | |
| CN110626948A (en) | Hydraulic control system of folding arm type lorry-mounted crane | |
| CN108569624B (en) | Unmanned aerial vehicle retrieves integrated car hydraulic control system | |
| CN104121242B (en) | Telescopic control system and engineering machinery | |
| CN215043641U (en) | Hydraulic retraction system for any position of undercarriage | |
| EP2514708B1 (en) | Picking truck with a driver's cab that can be raised and lowered | |
| DE3807966A1 (en) | Lifting platform with processor control | |
| CN214879732U (en) | Crane boom and automobile crane | |
| CN210655875U (en) | Hydraulic control system of folding arm type lorry-mounted crane | |
| CN205108849U (en) | Lift high fire engine automatic interlock of getting on or off bus | |
| CN207608232U (en) | Crane truck restraint protects system and autocrane | |
| CN108382281B (en) | Dump truck with vehicle-mounted grab | |
| CN216767964U (en) | Automatic interlocking control system for getting-off, getting-on and platform of bridge inspection vehicle | |
| JP3768066B2 (en) | Rail wheel rolling control device for railcars | |
| CN203976348U (en) | A kind of hand-hydraulic calibration package for anti-explosion electric aerial platform | |
| CN105288909B (en) | A kind of elevating fire truck with duplicate protection is got on or off the bus automatic interlocking device | |
| CN107829634B (en) | Automatic control system and control method for support roll-over door | |
| CN213870497U (en) | Multi-action integrated valve bank with switching function | |
| CN210521601U (en) | Elevating fire truck getting-on and getting-off interlocking device | |
| CN117533970A (en) | Landing leg hydraulic system, engineering machinery and control method of landing leg hydraulic system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |