CN207511792U - The arm support control system and aerial work platform of aerial work platform - Google Patents
The arm support control system and aerial work platform of aerial work platform Download PDFInfo
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- CN207511792U CN207511792U CN201720299140.2U CN201720299140U CN207511792U CN 207511792 U CN207511792 U CN 207511792U CN 201720299140 U CN201720299140 U CN 201720299140U CN 207511792 U CN207511792 U CN 207511792U
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Abstract
The utility model discloses the arm support control systems and aerial work platform of a kind of aerial work platform.Arm support control system includes main pump, emergency pump and for the workbench of aerial work platform to be controlled to carry out the leveling cyclinder of leveling, and arm support control system has normal control state and Emergency recovery state, and in normal control state, main pump is leveling cyclinder fuel feeding；In Emergency recovery state, emergency pump is leveling cyclinder fuel feeding.Workbench remains able to realize leveling when the arm support control system of the aerial work platform of the utility model is by being arranged under Emergency recovery state as the arm support control system of emergency pump the utility model of leveling cyclinder fuel feeding under Emergency recovery state.
Description
Technical field
The utility model is related to engineering machinery field, the arm support control system and height of more particularly to a kind of aerial work platform
Working platform.
Background technology
Aerial work platform is the hoisting machinery that staff and equipment are transported to certain altitude progress operation.Due to needing
Manned operation is wanted, therefore its processing safety, comfort and reliability requirement are far above other general hoisting machineries.
The aerial work platform of workbench lifting is driven by two kinds by jib structure, one kind is crank arm type working at height
Platform, one kind are straight arm type aerial work platform.Wherein, the structure of straight arm type aerial work platform is as shown in Figure 1.Straight arm type is high
Working platform includes turntable 1, basic arm 4, two joint arms 5, amplitude oil cylinder 2, telescopic oil cylinder 3, workbench 7 and leveling cyclinder
6.Amplitude oil cylinder 2 drives luffing range of cantilever support.Telescopic oil cylinder 3 drives the flexible of arm support.Leveling cyclinder 6 is used to adjust workbench 7
Angle makes it keep basic horizontal.In order to ensure the safety of staff and comfort, the leveling performance of workbench is to weigh
One important indicator of the performance of aerial work platform.
As shown in Fig. 2, when arm support carries out luffing, the bottom surface of workbench 7 will no longer be protected the levelling principle of workbench 7
Water holding is put down, and the dip angle signal detected is simultaneously sent to controller by the inclination angle of the bottom surface of 8 collecting work platform 7 of obliquity sensor
15.Controller 15 makes the piston rod of leveling cyclinder 6 stretch out or contract according to 9 action of dip angle signal driving leveling reversal valve received
It returns, so as to directly drive rotation or backspin on workbench 7, realizes the leveling of workbench 7.
When staff on workbench 7 during operation in case of emergency, for example, engine or main oil pump
It breaks down, it is impossible to provide power for system.Emergency operation is needed at this time, by the gravity of arm support itself by aerial work platform
Arm support withdraw so that worker safety reach ground, prevent danger.
Arm support control system of the prior art is as shown in Figure 3.Arm support control system include main pump 10, main control valve 11,
Leveling reversal valve 9, luffing balanced valve 12, flexible balanced valve 13 and leveling balanced valve 14.Main pump 10 is controlled by main control valve 11
Amplitude oil cylinder 2 and telescopic oil cylinder 3 act and provide fluid for leveling cyclinder 6.
The following detailed description of arm support control system of the prior art in normal control state and Emergency recovery state
Specific work process.
In the normal control state, in the first solenoid directional control valve 121 and flexible balanced valve 13 in luffing balanced valve 12
Second solenoid directional control valve 131 must not be electric, is operated in spring position.Main pump 10 is load sensitive pump, is used herein as constant pressure pump.When
When third solenoid directional control valve 111 must not be electric, LS mouthfuls of pressure are zero, and main pump 10 is operated in armed state, and P mouthfuls of pressure are pressure of awaiting orders
Power (about 2MPa).When third solenoid directional control valve 111 must be electric, main pump 10 is operated in pressure constant state, and P mouthfuls of pressure are 21MPa.It overflows
Stream valve 112 shields.At this point, luffing proportioning valve 113 electric, 114 left position of luffing reversal valve or right position obtain it is electric, it can be achieved that arm
Frame luffing；Scaling valve 115 electric, flexible 116 left position of reversal valve or right position obtain it is electric, it can be achieved that boom frame telescopic.Pass through simultaneously
Control leveling reversal valve 9 can realize automatic leveling of the workbench in arm support action process.
Under Emergency recovery state, the first solenoid directional control valve 121 of luffing balanced valve 12 must be electric so that it is operated in work
Make position, the rodless cavity of amplitude oil cylinder 2 is connected with fuel tank, and luffing range of cantilever support falls under the effect of gravity.The second of flexible balanced valve 13
Solenoid directional control valve 131 must be electric so that it is operated in working position, and the rodless cavity of telescopic oil cylinder 3 is connected with fuel tank, in gravity
Lower arm support is retracted, so as to fulfill the urgent recycling of arm support.But under emergent operating mode, since main pump 10 is no longer leveling cyclinder 6
Power is provided, therefore when luffing range of cantilever support falls, workbench can substantially tilt and can not automatic leveling, therefore influence work is put down
The safety of staff on platform.
In addition, operating personnel when Emergency recovery state lower control arm frame luffing falls and retracts, need to operate high-altitude work
Two buttons on the operation panel of industry platform control the first solenoid directional control valve 121 and the second solenoid directional control valve 131 to obtain respectively
Electricity, when operation needs two hands, and coordinated manipulation could realize that arm support is retracted while luffing falls simultaneously, therefore complicated for operation.And
For arm support during luffing falls and retracts, luffing range of cantilever support and the speed retracted are uncontrollable.
Utility model content
The purpose of this utility model is to provide the arm support control system and aerial work platform of a kind of aerial work platform,
So that the workbench of aerial work platform can realize leveling under Emergency recovery state.
The utility model first aspect provide a kind of arm support control system of aerial work platform include main pump, emergency pump and
For the workbench of aerial work platform to be controlled to carry out the leveling cyclinder of leveling, arm support control system has normal control state
With Emergency recovery state, in normal control state, main pump is leveling cyclinder fuel feeding；In Emergency recovery state, emergency pump is leveling
Oil cylinder fuel feeding.
Further, arm support control system further includes amplitude oil cylinder, telescopic oil cylinder, control valve group and emergent oil return line, becomes
Width oil cylinder has the first working chamber and the second working chamber, and driving arm support falls during the first working chamber oil inlet of amplitude oil cylinder, luffing
Arm support is driven to rise during the second working chamber oil inlet of oil cylinder；Telescopic oil cylinder has the first working chamber and the second working chamber, and stretch oil
Arm support is driven to retract during the first working chamber oil inlet of cylinder, driving arm support stretches out during the second working chamber oil inlet of telescopic oil cylinder；It is emergent
First working chamber of the oil return line respectively with the second working chamber of amplitude oil cylinder and telescopic oil cylinder is connect；Wherein, in normally control shape
State, the emergent oil return line of control valve group control are disconnected so that amplitude oil cylinder and the normal oil return of telescopic oil cylinder；In Emergency recovery state, control
Second working chamber of valve group control amplitude oil cylinder processed connects to control with the first working chamber of telescopic oil cylinder by emergent oil return line
Arm support is retracted while falling.
Further, control valve group includes controlling the flexible reversal valve that telescopic oil cylinder stretches and being set to emergent oil return
Road and the first on-off valve for controlling emergent oil return line break-make, oil return line of meeting an urgent need are connected by flexible reversal valve with telescopic oil cylinder
It connects, in normal control state, the emergent oil return line of the first on-off valve control is disconnected so that amplitude oil cylinder and telescopic oil cylinder normally return
Oil；In Emergency recovery state, the emergent oil return line of the first on-off valve control connects and the emergent oil return line of reversal valve control that stretches is with stretching
First working chamber of contracting oil cylinder is connected so that the second working chamber of amplitude oil cylinder is connected with the first working chamber of telescopic oil cylinder.
Further, the first on-off valve includes the first hydraulic fluid port and the second hydraulic fluid port and with pressure control terminal, the first on-off valve
The first hydraulic fluid port and the second working chamber of amplitude oil cylinder connect, the second hydraulic fluid port of the first on-off valve and the oil inlet of flexible reversal valve
Connection, the first on-off valve control the break-make of the first hydraulic fluid port and the second hydraulic fluid port according to the pressure of pressure control terminal.
Further, in Emergency recovery state, the pump discharge of emergency pump is connect with pressure control terminal to be controlled with control pressure
The pressure at end.
Further, control valve group includes the second break-make being set between the pump discharge of emergency pump and pressure control terminal
Valve, in normal control state, the pump discharge of the second on-off valve control emergency pump is disconnected with pressure control terminal；In Emergency recovery shape
State, the pump discharge of the second on-off valve control emergency pump are connected with pressure control terminal.
Further, the first on-off valve includes hydraulic control one-way valve, the oil inlet of hydraulic control one-way valve and flexible reversal valve into
Hydraulic fluid port connects, and the oil outlet of hydraulic control one-way valve and the second working chamber of amplitude oil cylinder connect.
Further, control valve group further includes the check valve between the first on-off valve and flexible reversal valve, check valve
Oil inlet connect with the first on-off valve, the oil outlet of check valve is connect with flexible reversal valve.
Further, control valve group further includes the restricting element contacted with the first on-off valve.
Further, oil return line of meeting an urgent need also is connect with oil extraction, and control valve group further includes oil extraction control valve, and oil extraction control valve is used
In controlled under Emergency recovery state emergent oil return line selectively with one in the first working chamber of telescopic oil cylinder and oil extraction
Connection.
Further, arm support control system further includes sensor, sensor be used to detect the retracted mode of arm support and with row
Oil control valve couples, the retracted mode of the arm support control oil extraction control valve events that oil extraction control valve is detected according to sensor.
The utility model second aspect provides a kind of aerial work platform, is carried including any one of the utility model first aspect
The arm support control system of the aerial work platform of confession.
Arm support control system and aerial work platform based on aerial work platform provided by the utility model, arm support control
System includes main pump, emergency pump and for the workbench of aerial work platform to be controlled to carry out the leveling cyclinder of leveling, arm support control
System processed has normal control state and Emergency recovery state, and in normal control state, main pump is leveling cyclinder fuel feeding；Emergent
Recycling state, emergency pump are leveling cyclinder fuel feeding.The arm support control system of the aerial work platform of the utility model passes through setting
Emergency pump for leveling cyclinder fuel feeding under Emergency recovery state causes the arm support control system of the utility model in Emergency recovery
Workbench remains able to realize leveling when under state.So as to be conducive to ensure the work under Emergency recovery state on workbench
The safety and comfort level of personnel.
By referring to the drawings to the detailed description of the exemplary embodiment of the utility model, the utility model it is other
Feature and its advantage will become apparent.
Description of the drawings
Attached drawing described herein is used to provide a further understanding of the present invention, and forms the part of the application,
The illustrative embodiments and their description of the utility model are not formed for explaining the utility model to the improper of the utility model
It limits.In the accompanying drawings：
Fig. 1 is the structure diagram of aerial work platform；
Fig. 2 is the levelling principle structure diagram of the workbench in Fig. 1；
Fig. 3 is the structure diagram of arm support control system of the prior art；
Fig. 4 is the structure diagram of the arm support control system of the utility model embodiment；
Fig. 5 is the concrete structure schematic diagram of the main control valve in Fig. 4；
Fig. 6 is the concrete structure schematic diagram of the luffing balanced valve in Fig. 4.
Each reference numeral represents respectively：
1- turntables；2- amplitude oil cylinders；3- telescopic oil cylinders；4- basic arms；Bis- joint arms of 5-；6- leveling cyclinders；7- workbenches；
8- obliquity sensors；9- leveling reversal valves；10- main pumps；11- main control valves；111- third solenoid directional control valves；112- overflow valves；
113- luffing proportioning valves；114- luffing reversal valves；115- scaling valves；116- stretches reversal valve；12- luffing balanced valves；
The first solenoid directional control valves of 121-；13- stretches balanced valve；The second solenoid directional control valves of 131-；14- leveling balanced valves；15- controllers；
20- main pumps；21- main control valves；211- solenoid directional control valves；212- overflow valves；213- luffing proportioning valves；214- luffing reversal valves；
215- scaling valves；216- stretches reversal valve；217- solenoid directional control valves；218- oil extraction control valves；The second fluid-control one-ways of 219-
Valve；210- check valves；22- luffing balanced valves；The first hydraulic control one-way valves of 221-；222- throttle valves；23- stretches balanced valve；24-
Leveling balanced valve；29- leveling reversal valves；30- emergency pumps；32- amplitude oil cylinders；33- telescopic oil cylinders；34- leveling cyclinders.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
It clearly and completely describes, it is clear that the described embodiments are only a part of the embodiments of the utility model rather than whole
Embodiment.It is illustrative to the description only actually of at least one exemplary embodiment below, is never used as to this practicality
Novel and its application or any restrictions used.Based on the embodiment in the utility model, those of ordinary skill in the art are not having
All other embodiments obtained under the premise of creative work are made, shall fall within the protection scope of the present invention.
Unless specifically stated otherwise, the component and positioned opposite, the digital table of step otherwise illustrated in these embodiments
Up to the unlimited the scope of the utility model processed of formula and numerical value.Simultaneously, it should be appreciated that for ease of description, each shown in attached drawing
The size of a part is not to be drawn according to practical proportionate relationship.For skill known to person of ordinary skill in the relevant
Art, method and apparatus may be not discussed in detail, but in the appropriate case, and the technology, method and apparatus should be considered as awarding
Weigh part of specification.In shown here and discussion all examples, any occurrence should be construed as merely example
Property, not as limitation.Therefore, the other examples of exemplary embodiment can have different values.It should be noted that：It is similar
Label and letter similar terms are represented in following attached drawing, therefore, once be defined in a certain Xiang Yi attached drawing, then with
In attached drawing afterwards do not need to that it is further discussed.
For ease of description, spatially relative term can be used herein, as " ... on ", " ... top ",
" ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy
The spatial relation of sign.It should be understood that spatially relative term is intended to comprising the orientation in addition to device described in figure
Except different direction in use or operation.For example, if the device in attached drawing is squeezed, it is described as " in other devices
It will be positioned as " under other devices or construction after the device of part or construction top " or " on other devices or construction "
Side " or " under other devices or construction ".Thus, exemplary term " ... top " can include " ... top " and
" in ... lower section " two kinds of orientation.The device can also other different modes positioning (being rotated by 90 ° or in other orientation), and
And respective explanations are made in opposite description to space used herein above.
As shown in figure 4, the arm support control system of the aerial work platform of the utility model embodiment includes main pump 20, meets an urgent need
Pump 30 and the leveling cyclinder 34 for controlling the progress leveling of the workbench of aerial work platform.Arm support control system has normal
State of a control and Emergency recovery state.In normal control state, main pump 20 is 34 fuel feeding of leveling cyclinder；In Emergency recovery state,
Emergency pump 30 is 34 fuel feeding of leveling cyclinder.The arm support control system of the aerial work platform of the utility model embodiment passes through setting
For the emergency pump 30 of leveling cyclinder fuel feeding so that the arm support control system of the utility model embodiment exists under Emergency recovery state
Workbench remains able to realize leveling when under Emergency recovery state.So as to be conducive to ensure the workbench under Emergency recovery state
On staff safety and comfort level.
Below by according to fig. 4 to fig. 6 to the concrete structure of the arm support control system of one specific embodiment of the utility model into
Row is described in detail.
The arm support control system of the present embodiment includes main pump 20, emergency pump 30, leveling cyclinder 34 and control valve group.Control
Valve group includes main control valve 21, leveling balanced valve 24 and leveling reversal valve 24.
Wherein, main control valve 21 has the main hydraulic fluid port P1 being connect with main pump 20 and the emergent hydraulic fluid port being connect with emergency pump 30
P2.In the normal control state, the fluid of main pump 20, which enters in main control valve 21 by main hydraulic fluid port P1 and passes through leveling hydraulic fluid port H, is
34 fuel feeding of leveling cyclinder.Under Emergency recovery state, the fluid of emergency pump 30 by emergent hydraulic fluid port P2 enter main control valve 21 and
Leveling hydraulic fluid port H is reached with for 34 fuel feeding of leveling cyclinder by solenoid directional control valve 211.The oil inlet of leveling reversal valve 29 and leveling oil
Mouth H connections, the first oil outlet of leveling reversal valve 29 and the rodless cavity of leveling cyclinder connect, and the second of leveling reversal valve 29 is fuel-displaced
Mouthful connect with the rod chamber of leveling cyclinder, the control of leveling reversal valve 29 its oil inlet selectively with its first oil outlet and Qi
A connection in two oil outlets is so that the fluid of emergency pump 30 enters rodless cavity or the rod chamber of leveling cyclinder to control work
The leveling of platform.
As shown in figure 4, the arm support control system of the present embodiment further includes amplitude oil cylinder 32 and telescopic oil cylinder 33.Control valve group
Further include luffing balanced valve 22 and flexible balanced valve 23.Main control valve 21 includes the change amplitude ratio for amplitude oil cylinder 32 to be controlled to act
Example valve 213 and luffing reversal valve 214 and for control telescopic oil cylinder 33 act scaling valve 215 and flexible reversal valve
216.Amplitude oil cylinder 32 has the first working chamber (rodless cavity) and the second working chamber (rod chamber), the rodless cavity of amplitude oil cylinder 32 into
Arm support is driven to fall when oily, driving arm support rises during the rod chamber oil inlet of amplitude oil cylinder 32.Telescopic oil cylinder 33 have rodless cavity and
Rod chamber.Arm support is driven to retract during the rodless cavity oil inlet of telescopic oil cylinder 33, when rod chamber oil inlet of telescopic oil cylinder 33 drives arm support
It stretches out.
In the normal control state, the fluid of main pump 20 enters main control valve 21 by main hydraulic fluid port P1 and passes through luffing ratio
Valve 213 is connect with the oil inlet of luffing reversal valve 214.First oil outlet of luffing reversal valve 214 and the first of main control valve 21
The M1 connections of luffing hydraulic fluid port, the second oil outlet of luffing reversal valve 214 are connect with the second luffing hydraulic fluid port M2 of main control valve 21.And the
One luffing hydraulic fluid port M1 is connect with the rodless cavity of amplitude oil cylinder 32, and the second luffing hydraulic fluid port M2 is connect with the rod chamber of amplitude oil cylinder 32.
Luffing reversal valve 214 controls its oil inlet selectively to connect to control with one in its first oil outlet and its second oil outlet
The fluid of main pump 20 processed enters rod chamber or the rodless cavity of amplitude oil cylinder 32 so that arm support to be controlled to rise or fall.Similarly, main pump
20 fluid enters after main control valve 21 to be connect by scaling valve 215 with the oil inlet of flexible reversal valve 216.It is flexible to change
First flexible hydraulic fluid port N1 connections of the first oil outlet and main control valve to valve 216, stretch reversal valve 216 the second oil outlet with
Second flexible hydraulic fluid port N2 connections of main control valve.And first flexible hydraulic fluid port N1 connect with the rodless cavity of telescopic oil cylinder 33, second stretches
Contracting hydraulic fluid port N2 is connect with the rod chamber of telescopic oil cylinder 33.Flexible reversal valve 216 controls its oil inlet selectively first to go out with it
Hydraulic fluid port and a rodless cavity connected so that the fluid of main pump 20 to be controlled to enter telescopic oil cylinder 33 in its second oil outlet have bar
Chamber with control arm support stretch out or retract.
Preferably, the arm support control system of the present embodiment further includes emergent oil return line.Emergent oil return line is oily with luffing respectively
The rodless cavity of cylinder 32 is connected with the rod chamber of telescopic oil cylinder 33.
In normal control state, the emergent oil return line of control valve group control is disconnected so that amplitude oil cylinder 32 and telescopic oil cylinder 33
Normal oil return.In Emergency recovery state, the rod chamber of the rodless cavity and telescopic oil cylinder 33 of control valve group control amplitude oil cylinder 32 leads to
Emergent oil return line connection is crossed so that arm support to be controlled to retract while falling.The arm support control system of the present embodiment is in Emergency recovery shape
The rodless cavity of amplitude oil cylinder is connected by emergent oil return line with the rod chamber of telescopic oil cylinder under state, therefore when arm support is in gravity
Arm support can be driven to retract automatically simultaneously during lower automatic whereabouts.
In order on the basis of ensureing that arm support control system can realize luffing range of cantilever support and stretch in the normal control state
It can also realize that the whereabouts of arm support is carried out at the same time with retraction under Emergency recovery state, the control valve group of the present embodiment includes being set to
The first on-off valve met an urgent need on oil return line and for controlling emergent oil return line break-make.Emergent oil return line passes through the reversal valve 216 that stretches
It is connect with telescopic oil cylinder 33.In normal control state, the emergent oil return line of the first on-off valve control is disconnected so that amplitude oil cylinder 32
With 33 normal oil return of telescopic oil cylinder.In Emergency recovery state, the emergent oil return line connection of the first on-off valve control and the reversal valve that stretches
The emergent oil return line of 216 controls is connected with the rod chamber of telescopic oil cylinder 33 so that the rodless cavity of amplitude oil cylinder 32 and telescopic oil cylinder 33
Rod chamber connection.For operating personnel, as long as controlling first on-off valve real under Emergency recovery state
The whereabouts of existing arm support is carried out at the same time with retraction, compared with prior art, without right-hand man's coordinated manipulation, therefore side easy to operate
Just.One control button can be only set on the operation panel of the aerial work platform of the present embodiment.Control button control electricity
Magnetic reversal valve 217, flexible reversal valve 216 left position whether it is electric, while emergency pump is run simultaneously, you can realization luffing range of cantilever support
It falls and retraction is carried out at the same time, thus it is easy to operate and efficient.
Preferably, the first on-off valve is pressure on-off valve, that is to say, that including the first hydraulic fluid port and the second hydraulic fluid port and with pressure
Power control terminal.First hydraulic fluid port of the first on-off valve is connect with the rodless cavity of amplitude oil cylinder 32, the second hydraulic fluid port of the first on-off valve with
The oil inlet connection of flexible reversal valve 216.First on-off valve controls the first hydraulic fluid port and the second oil according to the pressure of pressure control terminal
The break-make of mouth.In normal control state, the first hydraulic fluid port is controlled to be disconnected with the second hydraulic fluid port for the first on-off valve so that emergent oil return line breaks
It opens；In Emergency recovery state, the first on-off valve controls the first hydraulic fluid port to be connected with the second hydraulic fluid port and reversal valve control of stretching is stretched and changed
It is connected to the oil inlet of valve with the rod chamber of telescopic oil cylinder.
Specifically, in the present embodiment, the first on-off valve is the first hydraulic control one-way valve 221.First hydraulic control one-way valve 221
Oil inlet is connect with the oil inlet of flexible reversal valve 216, and the oil outlet of the first hydraulic control one-way valve 221 is with amplitude oil cylinder 32 without bar
Chamber connects.And the pressure control terminal C of the first hydraulic control one-way valve 221 is connect with the pump discharge of emergency pump 30.In normally control shape
Under state, the first hydraulic control one-way valve 221 is in the state of positive circulation, at this time to prevent the fluid of scaling valve 215 by the
One hydraulic control one-way valve 221 enters the rodless cavity of amplitude oil cylinder 32 and influences the normal luffing of arm support, as shown in Figure 4 and Figure 5, this reality
The main control valve 21 for applying example further includes check valve 210.The oil inlet of the oil inlet of check valve 210 and the first hydraulic control one-way valve 221
Mouth connection, the oil outlet of check valve 210 are connect with the oil inlet of luffing reversal valve 216.Therefore, in the normal control state, become
Width oil cylinder 32 and telescopic oil cylinder 33 can carry out oil return to realize the luffing of arm support and stretch.Under Emergency recovery state, meet an urgent need
The pump discharge of pump 30 is connect with the pressure control terminal of the first hydraulic control one-way valve 221, at this time 221 reverse flow of the first hydraulic control one-way valve
Logical, the fluid of the rodless cavity of amplitude oil cylinder 32 enters flexible reversal valve by the first hydraulic control one-way valve 221 and check valve 210
216.Flexible reversal valve 216 controls its oil inlet to be connected with the rod chamber of telescopic oil cylinder so that the oil of the rodless cavity of amplitude oil cylinder
The rod chamber that liquid enters telescopic oil cylinder realizes that the whereabouts of arm support is carried out at the same time with retraction.The arm support control system of the present embodiment passes through
First hydraulic control one-way valve 221 on emergent oil return line is set and controls the first hydraulic control one-way valve 221 dynamic by emergency pump 30
To make so that the present embodiment is to realize that the emergency pump of emergent levelling function can also realize that the whereabouts of arm support and retraction are carried out at the same time,
It realizes multi-purpose content, simplifies the structure of arm support control system.In addition, the arm support control system of the present embodiment selects universal component liquid
Check valve is controlled to control the break-make of emergent oil return line, it is cost-effective.
Preferably, the first hydraulic control one-way valve 221 is integrated in luffing balanced valve 22 by the present embodiment, therefore is normally being controlled
During state processed, a bit of pipeline only between the rodless cavity of amplitude oil cylinder 32 and luffing balanced valve 22 bears the pressure of fluid,
So as to reduce the pressure bearing requirement to remaining section of pipeline on oil return line of meeting an urgent need to reduce cost.
To prevent the failure of the first hydraulic control one-way valve 221 to improve the reliability of the arm support control system of the present embodiment, such as
Shown in Fig. 4 and Fig. 5, the arm support control system of the present embodiment is integrally disposed with the first hydraulic control one-way valve in main control valve 21
221 the second hydraulic control one-way valves 219 connected and set in the same direction.And second hydraulic control one-way valve 219 pressure control terminal also with it is emergent
The pump discharge connection of pump 30.Therefore, emergency pump 30 can control the first hydraulic control one-way valve 221 and the second hydraulic control one-way valve simultaneously
219 reverse circulateds.
Preferably, the main control valve 21 of the present embodiment includes the pump discharge and the first hydraulic control one-way valve that are set to emergency pump 30
The second on-off valve between 221 pressure control terminal.In normal control state, the pump discharge of the second on-off valve control emergency pump with
Pressure control terminal disconnects.In Emergency recovery state, the pump discharge of the second on-off valve control emergency pump is connected with pressure control terminal.
As shown in figure 5, second on-off valve of the present embodiment is solenoid directional control valve 217.Solenoid directional control valve 217 is included with meeting an urgent need
Pump the first hydraulic fluid port, the second hydraulic fluid port being connect with pressure control terminal and the oil discharge outlet of 30 pump discharge connection and with the first working position
With the second working position.In the first working position, the first hydraulic fluid port of solenoid directional control valve 217 ends, the second hydraulic fluid port of solenoid directional control valve 217
It is connected with oil discharge outlet.In the second working position, the first hydraulic fluid port of solenoid directional control valve 217 is connected with the second hydraulic fluid port, oil discharge outlet cut-off.Its
In, in normal control state, the second on-off valve is in the first working position, and in Emergency recovery state, the second on-off valve is in second
Working position.
Preferably, the emergent oil return line of the present embodiment is also connect with oil extraction.Emergent oil return line further includes oil extraction control valve
218.Oil extraction control valve 218 be used to controlling under Emergency recovery state emergent oil return line selectively with the first work of telescopic oil cylinder
Make chamber to connect with one in oil extraction.The first end of emergent oil return line is connect with the rodless cavity of amplitude oil cylinder 32, oil return line of meeting an urgent need
Second end connect with the oil inlet of flexible reversal valve 216 and oil extraction.When arm support is not retracted into bottom, oil extraction control valve 218 is controlled
The emergent oil return line of system is disconnected with oil extraction, at this point, the rod chamber that the fluid of the rodless cavity of amplitude oil cylinder 32 enters telescopic oil cylinder 33 makes
The whereabouts of arm support is carried out at the same time with retraction.When arm support is retracted into bottom, the emergent oil return line of the control of oil extraction control valve 218 connects with oil extraction
It is logical, at this point, the fluid of the rodless cavity of amplitude oil cylinder 32 is vented directly to fuel tank.
In order to detect the retracted mode of arm support to control the action of oil extraction control valve 218, the arm support control of the present embodiment is
System further includes sensor.Sensor is used to detect the retracted mode of arm support and be coupled with oil extraction control valve 218, oil extraction control valve
The retracted mode control oil extraction control valve events of 218 arm supports detected according to sensor.
For the speed that arm support is controlled to fall and retract, the control valve group of the present embodiment is further included contacts with the first on-off valve
Restricting element.
As shown in fig. 6, specifically in the present embodiment, restricting element is the throttle valve being set in luffing balanced valve 22
222.Since the arm support control system of the present embodiment is when in Emergency recovery state, the rodless cavity of amplitude oil cylinder and flexible oil
The rod chamber connection of cylinder, therefore the setting of throttle valve 222 is so that arm support falls and the speed of retraction is controllable.
The course of work of the arm support control system of the present embodiment is as follows：
In normal control state, solenoid directional control valve 217 and oil extraction control valve 218 must not be electric, are operated in spring position, become
The rodless cavity of width oil cylinder 32 can not be by emergent oil return line off-load, therefore 33 normal oil return of amplitude oil cylinder 32 and telescopic oil cylinder.
In Emergency recovery state, solenoid directional control valve 217 must be electric, and oil extraction control valve 218 must not electricity.Flexible reversal valve 216 is left
Position obtains electric.The fluid of the pump discharge of emergency pump 30 is through solenoid directional control valve 217 by the first hydraulic control one-way valve 221 and the second fluid-control one-way
Valve 219 is opened, and the fluid of the rodless cavity of amplitude oil cylinder 32 is through throttle valve 222, the first hydraulic control one-way valve 221, the second fluid-control one-way
Valve 219, check valve 210 and flexible reversal valve 216 reach the rod chamber of telescopic oil cylinder 33, open simultaneously the nothing of flexible balanced valve 23
The overflow valve of rod cavity side, the luffing so as to fulfill arm support falls and arm support retraction is carried out at the same time.
When sensor detection arm support is retracted into bottom, oil extraction control valve 218 obtains electric.The oil of the rodless cavity of amplitude oil cylinder 32
Liquid is straight through throttle valve 222, the first hydraulic control one-way valve 221, the second hydraulic control one-way valve 219, check valve 210 and oil extraction control valve 218
It connects and flows back to fuel tank, be retracted into behind bottom so as to fulfill arm support and continue luffing whereabouts until state of returning the vehicle to the garage and knock off.
The arm support control system of the utility model embodiment can also be applied to straight-arm in addition to applied to aerial work platform
On formula fire fighting truck.
Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model rather than it is limited
System；Although the utility model is described in detail with reference to preferred embodiment, those of ordinary skill in the art should
Understand：It can still modify to specific embodiment of the present utility model or some technical characteristics are equally replaced
It changes；Without departing from the spirit of technical solutions of the utility model, should all cover in the claimed technical solution of the utility model
In range.
Claims (12)
1. a kind of arm support control system of aerial work platform, which is characterized in that including：Main pump (20), is used for emergency pump (30)
The workbench of the aerial work platform is controlled to carry out the leveling cyclinder (34) of leveling and for controlling the working at height
The amplitude oil cylinder (32) of the arm support lifting of platform, the arm support control system have normal control state and Emergency recovery state,
In the normal control state, the main pump (20) is the leveling cyclinder (34) fuel feeding；It is described in the Emergency recovery state
Emergency pump (30) is the leveling cyclinder (34) fuel feeding.
2. the arm support control system of aerial work platform according to claim 1, which is characterized in that the arm support control system
System further includes amplitude oil cylinder (32), telescopic oil cylinder (33), control valve group and emergent oil return line, and the amplitude oil cylinder (32) has the
One working chamber and the second working chamber, when the first working chamber oil inlet of the amplitude oil cylinder (32), drives the arm support to fall, described
The arm support is driven to rise during the second working chamber oil inlet of amplitude oil cylinder (32)；The telescopic oil cylinder (33) has the first working chamber
With the second working chamber, when the first working chamber oil inlet of the telescopic oil cylinder (33), drives the arm support to retract, the telescopic oil cylinder
(33) arm support is driven to stretch out during the second working chamber oil inlet；The emergent oil return line respectively with the amplitude oil cylinder (32)
Second working chamber is connected with the first working chamber of the telescopic oil cylinder (33)；Wherein, in the normal control state, the control
The valve group control emergent oil return line is disconnected so that the amplitude oil cylinder and the normal oil return of the telescopic oil cylinder；It meets an urgent need back described
Receipts state, the control valve group control the second working chamber of the amplitude oil cylinder (32) and the first work of the telescopic oil cylinder (33)
Make chamber by the emergent oil return line connection so that the arm support to be controlled to retract while falling.
3. the arm support control system of aerial work platform according to claim 2, which is characterized in that the control valve group packet
It includes to control flexible reversal valve (216) that the telescopic oil cylinder stretches and be set on the emergent oil return line and for controlling
First on-off valve of the emergent oil return line break-make, the emergent oil return line are stretched by the flexible reversal valve (216) with described
Contracting oil cylinder (33) connects, in the normal control state, the first on-off valve control emergent oil return line disconnect so that
The amplitude oil cylinder (32) and the telescopic oil cylinder (33) normal oil return；In the Emergency recovery state, first on-off valve
It controls the emergent oil return line connection and the flexible reversal valve (216) controls the emergent oil return line and the telescopic oil cylinder
(33) the first working chamber connection so that the second working chamber and the telescopic oil cylinder (33) of the amplitude oil cylinder (32) the
One working chamber connects.
4. the arm support control system of aerial work platform according to claim 3, which is characterized in that first on-off valve
Including the first hydraulic fluid port and the second hydraulic fluid port and with pressure control terminal, the first hydraulic fluid port and the amplitude oil cylinder of first on-off valve
(32) the second working chamber connection, the second hydraulic fluid port of first on-off valve and the oil inlet of the flexible reversal valve (216) connect
It connects, first on-off valve controls the break-make of first hydraulic fluid port and the second hydraulic fluid port according to the pressure of the pressure control terminal.
5. the arm support control system of aerial work platform according to claim 4, which is characterized in that in the Emergency recovery
State, the pump discharge of the emergency pump (30) connect the pressure to control the pressure control terminal with the pressure control terminal.
6. the arm support control system of aerial work platform according to claim 5, which is characterized in that the control valve group packet
The second on-off valve between the pump discharge for being set to the emergency pump (30) and the pressure control terminal is included, in the normal control
State, second on-off valve control the pump discharge of the emergency pump (30) and the pressure control terminal to disconnect；Described emergent
Recycling state, second on-off valve control the pump discharge of the emergency pump (30) to be connected with the pressure control terminal.
7. the arm support control system of aerial work platform according to claim 4, which is characterized in that first on-off valve
Including hydraulic control one-way valve, the oil inlet of the hydraulic control one-way valve is connect with the oil inlet of the flexible reversal valve, the hydraulic control list
It is connect to the oil outlet of valve with the second working chamber of the amplitude oil cylinder.
8. the arm support control system of aerial work platform according to claim 3, which is characterized in that the control valve group is also
Including the check valve being set between first on-off valve and the flexible reversal valve, the oil inlet of the check valve and described the
One on-off valve connects, and the oil outlet of the check valve is connect with the flexible reversal valve.
9. the arm support control system of aerial work platform according to claim 3, which is characterized in that the control valve group is also
Including the restricting element contacted with first on-off valve.
10. the arm support control system of aerial work platform according to claim 2, which is characterized in that the emergent oil return
Road is also connect with oil extraction, and the control valve group further includes oil extraction control valve (218), and the oil extraction control valve (218) is in institute
State controlled under Emergency recovery state the emergent oil return line selectively in the first working chamber of the telescopic oil cylinder and oil extraction
One connection.
11. the arm support control system of aerial work platform according to claim 10, which is characterized in that the arm support control
System further includes sensor, the sensor be used to detect the retracted mode of the arm support and with the oil extraction control valve (218)
Coupling, the oil extraction control valve (218) control the oil extraction control according to the retracted mode of the arm support that the sensor detects
Valve (218) action processed.
12. a kind of aerial work platform, which is characterized in that including the working at height as described in any one of claim 1 to 11
The arm support control system of platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720299140.2U CN207511792U (en) | 2017-03-27 | 2017-03-27 | The arm support control system and aerial work platform of aerial work platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720299140.2U CN207511792U (en) | 2017-03-27 | 2017-03-27 | The arm support control system and aerial work platform of aerial work platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207511792U true CN207511792U (en) | 2018-06-19 |
Family
ID=62530951
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720299140.2U Withdrawn - After Issue CN207511792U (en) | 2017-03-27 | 2017-03-27 | The arm support control system and aerial work platform of aerial work platform |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207511792U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106829815A (en) * | 2017-03-27 | 2017-06-13 | 徐工消防安全装备有限公司 | The arm support control system and aerial work platform of aerial work platform |
| CN114165490A (en) * | 2022-01-17 | 2022-03-11 | 湖南星邦智能装备股份有限公司 | Control method and system for controlling arm support to retract, mechanical equipment and storage medium |
-
2017
- 2017-03-27 CN CN201720299140.2U patent/CN207511792U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106829815A (en) * | 2017-03-27 | 2017-06-13 | 徐工消防安全装备有限公司 | The arm support control system and aerial work platform of aerial work platform |
| CN114165490A (en) * | 2022-01-17 | 2022-03-11 | 湖南星邦智能装备股份有限公司 | Control method and system for controlling arm support to retract, mechanical equipment and storage medium |
| CN114165490B (en) * | 2022-01-17 | 2024-01-19 | 湖南星邦智能装备股份有限公司 | Control method, system, mechanical equipment and storage medium for controlling arm support retraction |
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