CN110206769A - The hydraulic overturning ladder of one kind and control method - Google Patents
The hydraulic overturning ladder of one kind and control method Download PDFInfo
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- CN110206769A CN110206769A CN201910489121.XA CN201910489121A CN110206769A CN 110206769 A CN110206769 A CN 110206769A CN 201910489121 A CN201910489121 A CN 201910489121A CN 110206769 A CN110206769 A CN 110206769A
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- Prior art keywords
- hydraulic
- ladder
- control valve
- hydraulic cylinder
- controller
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/0833—Improving access, e.g. for maintenance, steps for improving driver's access, handrails
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C5/00—Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles
- E06C5/02—Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles with rigid longitudinal members
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C5/00—Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles
- E06C5/32—Accessories, e.g. brakes on ladders
-
- 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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Ladders (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention discloses a kind of hydraulic overturning ladder and control methods, including ladder ontology, hydraulic pressure unit and controller, hydraulic pressure unit includes hydraulic pump, accumulator, the first control valve, hydraulic cylinder and the second control valve, and the output end of hydraulic pump is connected with the first hydraulic fluid port of the hydraulic fluid port of accumulator and the first control valve respectively；Second hydraulic fluid port of the first control valve is connected with the first oil pocket of hydraulic cylinder, and third hydraulic fluid port is connected by the second control valve with the second oil pocket of hydraulic cylinder, and the 4th hydraulic fluid port is connected with fuel tank；The piston rod end of hydraulic cylinder is connected by first rotating shaft with ladder ontology；Controller receives the output signal that switch unit and parking braking unit issue in vehicle, and sends corresponding control signal to the first control valve according to the signal received, realizes driving ladder ontology.The present invention includes mechanical, electrical, liquid integrated control, realizes the intelligent control that driver's cabin ladder is spun upside down, and improves the comfort for process of getting on the bus, and perching knife revolution when work is avoided to break ladder.
Description
Technical field
The invention belongs to technical field of engineering machinery, and in particular to the hydraulic overturning ladder of one kind and control method especially relate to
And a kind of hydraulic overturning ladder and control method for land leveller.
Background technique
Be for most of ladder of land leveller driver's cabin in the prior art it is fixed, can not achieve overturning, so as to cause
Grader is easy to encounter ladder when turning round.In order to solve this problem, it is proposed that realizing turning over for ladder using overturning oil cylinder
The solution turned, but the correlation with parking braking, engine start is not considered in the solution, thus safety wind
Danger is big.In addition, the ladder ground clearance in the prior art for land leveller driver's cabin is high, get on the bus inconvenience to cause driver
The problem of.
Summary of the invention
In view of the above-mentioned problems, the present invention proposes a kind of hydraulic overturning ladder and control method, fully take into account and parking
It brakes, the correlation of engine start, realizes spinning upside down for driver's cabin ladder, improve comfort of getting on the bus, avoid work
When perching knife revolution break ladder, greatly reduce security risk.
In order to achieve the above technical purposes, reach above-mentioned technical effect, the invention is realized by the following technical scheme:
In a first aspect, the present invention provides a kind of hydraulic overturning ladders, comprising:
Ladder ontology；
Hydraulic pressure unit, the hydraulic pressure unit include hydraulic pump, accumulator, the first control valve, hydraulic cylinder and the second control valve, institute
The output end for stating hydraulic pump is connected with the first hydraulic fluid port of the hydraulic fluid port of accumulator and the first control valve respectively；First control valve
The second hydraulic fluid port be connected with the first oil pocket of hydraulic cylinder, third hydraulic fluid port pass through second control valve and hydraulic cylinder the
Two oil pockets are connected, and the 4th hydraulic fluid port is connected with fuel tank；The piston rod end of the hydraulic cylinder passes through first rotating shaft and ladder sheet
Body is connected；
Controller, the controller receive the output signal that switch unit and parking braking unit issue in vehicle, and according to connecing
The signal received sends corresponding control signal to the first control valve, realizes and drives the ladder ontology.
Preferably, the second shaft and third shaft are respectively arranged on the ladder ontology and hydraulic cylinder, for drive
Room is sailed to be rotatedly connected.
Preferably, a kind of hydraulic overturning ladder further includes control handle, the control handle and second control
Valve processed is connected, and second control valve is also connected with fuel tank；
When operating the control handle, hydraulic oil in the hydraulic cylinder sequentially through hydraulic cylinder the first oil pocket,
Fuel tank is flowed into after two oil pockets, the second control valve, discharges the pressure in hydraulic pressure unit.
Preferably, the hydraulic system further includes filter, the output of the input terminal of the filter and the hydraulic pump
End is connected, and output end is connected with the first hydraulic fluid port of the hydraulic fluid port of the accumulator and the first control valve respectively.
Preferably, the switch unit includes rocker switch and girl's switch；The hydraulic overturning ladder further includes being used for
The position sensor of the position of ladder ontology is monitored, the output end of the position sensor is connected with the controller.
Preferably, when the parking braking for receiving the transmission of parking braking unit locks signal, start the switch unit,
Controller is according to electric signal is sent to the first control valve after the delay time of setting, hydraulic oil is after hydraulic pump exports preferentially to storage
Energy device filling liquid, energy storage, then enter back into the first control valve.
Preferably, when controlling ladder ontology and turning over, first control valve control hydraulic oil enters the of hydraulic cylinder
In two oil pockets, the first oil pocket of hydraulic cylinder is connected through the first control valve with fuel tank, realizes the extraction movement of hydraulic cylinder, ladder
It turns over, when the piston rod of hydraulic cylinder leads to the position demarcated, position sensor sends a signal to controller, by controller
The access for controlling the first control valve cutting hydraulic pump and hydraulic cylinder, completes to turn over；
When control turned under ladder ontology when, first control valve control hydraulic oil enters the first oil pocket of hydraulic cylinder, hydraulic
Second oil pocket of oil cylinder is connected through the first control valve with fuel tank, realizes the retract action of hydraulic cylinder, turns under ladder, hydraulic cylinder
Piston rod when being retracted to the position demarcated, position sensor sends a signal to controller, and controller controls the first control valve
The access for cutting off hydraulic pump and hydraulic cylinder, is turned under completion.
Preferably, when receive parking braking unit transmission parking braking lock signal when, if ladder ontology on
It turns over, then starts switch unit, control the first control valve using controller and change hydraulic cylinder into, oil return direction, hydraulic cylinder
Piston rod retracts, and turns under ladder；If ladder ontology turns over down, unit is started switch, utilizes the first control of controller control
Valve changes hydraulic cylinder into, oil return direction, and the piston rod of hydraulic cylinder is drawn, and ladder turns over.
Preferably, when the unlocked dead letter of the parking braking for receiving the transmission of parking braking unit, controller is not executed down
The instruction turned over；Engine start unit issues Engine Start Signal to controller, and controller is according to the position on hydraulic cylinder
Sensor judges ladder state, if ladder, which is in, turns over completion status, controller does not execute operation；It has been turned over if ladder is in down
At or turning over state, controller, which then issues, turns over signal to the first control valve, and execution is turned over movement by ladder ontology；Work as liquid
When the piston rod of compressing cylinder leads to the position demarcated, the position sensor on hydraulic cylinder sends a signal to controller, control
Device processed controls the access of the first control valve cutting hydraulic pump and hydraulic cylinder, turns over completion.
Second aspect, the present invention provides a kind of control method based on hydraulic overturning ladder described in first aspect,
Include:
Controller receives the output signal that switch unit, parking braking unit and engine start unit are sent in vehicle；
Controller sends corresponding control signal to the first control valve according to the signal received, realizes and drives the ladder sheet
Body.
Preferably, the method also includes:
Operate the control handle that is connected with the second control valve, the hydraulic oil in the hydraulic cylinder sequentially through hydraulic cylinder the
Fuel tank is flowed into after one oil pocket, the second oil pocket, the second control valve, discharges the pressure in hydraulic pressure unit.
Compared with prior art, beneficial effects of the present invention:
The hydraulic overturning ladder of one kind proposed by the present invention and control method, realized by switch unit driver's cabin ladder up and down
Overturning, by the pressure oil of accumulator deposit can realize engine not under starting state ladder multiple overturning needs, pass through control
Handle processed realizes the artificial overturning of in emergency circumstances ladder.The control of ladder is related to parking braking and engine start simultaneously.
It, can the overturning of normal control ladder when parking braking locks；When parking braking is not locked, do not allow to turn under ladder；Ladder is not located
Start engine when turning over completion status, ladder will turn over automatically.Hydraulic overturning ladder of the invention and control method include
The intelligent control that ladder is spun upside down is realized in mechanical, electrical, liquid integrated control, improves comfort of getting on the bus, and perching knife when work is avoided to return
Turn to break ladder, and reduces security risk.
Detailed description of the invention
Fig. 1 is the hydraulic overturning ladder structural schematic diagram of the embodiment of the present invention；
Fig. 2 is the hydraulic overturning ladder hydraulic principle schematic diagram of the embodiment of the present invention；
Fig. 3 is the hydraulic overturning ladder control cabinet structural schematic diagram of the embodiment of the present invention；
Fig. 4 (a) is control logic figure one of of the embodiment of the present invention when parking braking locks；
Fig. 4 (b) is the two of control logic figure of the embodiment of the present invention when parking braking locks；
Fig. 5 is control logic figure of the embodiment of the present invention when parking braking is not locked；
Fig. 6 is control logic figure of the embodiment of the present invention when controller breaks down；
Each appended drawing reference respectively represents:
1- ladder ontology；2- hydraulic cylinder；3- position sensor；4- control cabinet；5- rocker switch；6- indicator light；7- controls hand
Handle；The second shaft of 8-；9- bottom plate of driving cab；10- third shaft；11- first rotating shaft；12- driver's cabin；13- hydraulic pump；14- mistake
Filter；15- accumulator；The first control valve of 16-；17- buzzer；18- controller；19- girl's switch；The second control valve of 20-.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
It limits the scope of protection of the present invention.
Application principle of the invention is explained in detail with reference to the accompanying drawing.
Embodiment 1
As shown in Figure 1-3, the embodiment of the invention provides a kind of hydraulic overturning ladders, comprising:
Ladder ontology 1；In practical applications, the ladder ontology 1 is equipped with the second shaft 8, for rotating phase with driver's cabin 12
Even, it is preferable that second shaft 8 is set to the end of the ladder ontology 1, and is rotatedly connected with the bottom plate of driving cab 9；It climbs
Terraced ontology 1 can use any one ladder in the prior art, and structure sheet is not done excessive superfluous as the prior art
It states；
Hydraulic pressure unit, the hydraulic pressure unit include hydraulic pump 13, accumulator 15, the first control valve 16, hydraulic cylinder 2 and the second control
Valve 20 processed, the output end of the hydraulic pump 13 the first hydraulic fluid port phase with the hydraulic fluid port of accumulator 15 and the first control valve 16 respectively
Even；Second hydraulic fluid port of first control valve 16 is connected with the first oil pocket of hydraulic cylinder 2, and third hydraulic fluid port passes through described second
Control valve 20 is connected with the second oil pocket of hydraulic cylinder 2, and the 4th hydraulic fluid port is connected with fuel tank, the positive reason of second control valve 20
Normally off is under condition；The piston rod end of the hydraulic cylinder 2 is connected by first rotating shaft 11 with ladder ontology 1；In reality
In the application process of border, the outer wall of the hydraulic cylinder 2 is equipped with third shaft 10, for being rotatedly connected with bottom plate of driving cab 9；When
When the engine of land leveller does not start, 13 unpowered output of hydraulic pump, 15 self electromagnetism valve of accumulator is connected at this time, reservoir pressure
Oil provides hydraulic system power, and hydraulic cylinder 2 executes relevant action；
Controller 18, the controller 18 in vehicle switch unit and parking braking unit (not shown) be connected, connect
The output signal that the switch unit and parking braking unit issue is received, and corresponding control is sent according to the signal received and is believed
Number to the first control valve 16, realizes and drive the ladder ontology 1；Preferably, the switch unit includes rocker switch 5 and girl
Switch 19, the rocker switch 5 are set in driver's cabin；Girl's switch 19 and controller 18, which are set to, to be located at outside driver's cabin
Control cabinet 4 in；It is additionally provided with the buzzer 17 being connected with controller 18 in the control cabinet 4, is additionally provided with finger in the driver's cabin
Show lamp 6, when hydraulic pressure unit when something goes wrong, the indicator light 6 is bright and buzzer 17 works immediately, referring specifically to fig. 6.
Further, in order to realize the location control of ladder, in a kind of specific embodiment of the embodiment of the present invention, institute
Stating hydraulic overturning ladder further includes position sensor 3 for monitoring the position of ladder ontology 1, the position sensor 3 it is defeated
Outlet is connected with the controller 18.
In a kind of specific embodiment of the embodiment of the present invention, in order to improve the oil product of hydraulic oil, the hydraulic system
Further include filter 14, the input terminal of the filter 14 is connected with the output end of the hydraulic pump 13, output end respectively with
First hydraulic fluid port of the hydraulic fluid port of the accumulator 15 and the first control valve 16 is connected, and impurity can be effectively prevent to enter hydraulic cylinder
2 and accumulator 15 in.
In conclusion the working principle of the hydraulic overturning ladder of the embodiment of the present invention specifically:
When the parking braking that controller 18 receives the transmission of parking braking unit locks signal, starts the switch unit, refer to
Show that lamp 6 is bright, buzzer 17 works immediately, controller 18 sends electric signal to according to the delay time (such as 5 seconds) of setting afterwards
One control valve 16, hydraulic oil through filter 14, preferentially give 15 filling liquid of accumulator, energy storage after the output of hydraulic pump 13, then again into
Enter the first control valve 16；
When control ladder ontology 1 turns over, first control valve 16 controls the second oil pocket that hydraulic oil enters hydraulic cylinder 2
In (i.e. big oil pocket), the first oil pocket (i.e. small oil cavity) of hydraulic cylinder 2 is connected through the first control valve 16 with fuel tank, realizes hydraulic oil
The extraction of cylinder 2 acts, and ladder turns over, and when the piston rod of hydraulic cylinder 2 leads to the position demarcated, position sensor 3 is sent
Signal is controlled the access of the first control valve 16 cutting hydraulic pump 13 and hydraulic cylinder 2 by controller 18, referred to simultaneously to controller 18
Show that lamp 6 extinguishes, buzzer 17 stops working, completes to turn over；When control turned under ladder ontology 1 when, first control valve 16 is controlled
Hydraulic oil processed enters the first oil pocket of hydraulic cylinder 2, and the second oil pocket of hydraulic cylinder 2 is connected through the first control valve 16 with fuel tank,
It realizes the retract action of hydraulic cylinder 2, is turned under ladder, when the piston rod of hydraulic cylinder 2 is retracted to the position demarcated, position is passed
Sensor 3 sends a signal to controller 18, and the first control valve 16 of the control cutting hydraulic pump 13 of controller 18 is logical with hydraulic cylinder 2
Road is turned under completion, referring specifically to Fig. 4 (a) and (b).
When the parking braking that controller 18 receives the transmission of parking braking unit locks signal, if ladder ontology 1 is
It turns over, then starts switch unit (press to turn over or stir under rocker switch 5 and turn under girl's switch 19), controlled using controller 18
First control valve 16 changes hydraulic cylinder 2 into, oil return direction, and the piston rod of hydraulic cylinder 2 is retracted, turned under ladder；If ladder sheet
Body 1 turns over down, then starts switch unit, controls the first control valve 16 using controller 18 and changes hydraulic cylinder 2 into, oil return side
To the piston rod of hydraulic cylinder 2 is drawn, and ladder turns over, and overturning terminates the extinguishing of rear indicator light 6, buzzer 17 stops working.
Embodiment 2
In order to discharge the pressure in hydraulic pressure unit in time, hydraulic overturning ladder in the embodiment of the present invention further includes control handle
7, the control handle 7 is connected with second control valve, and second control valve is also connected with fuel tank；
When operating the control handle 7, hydraulic oil in the hydraulic cylinder 2 sequentially through hydraulic cylinder 2 the first oil pocket,
Fuel tank is flowed into after second oil pocket, the second control valve, discharges the pressure in hydraulic pressure unit.
Embodiment 3
The embodiment of the present invention the difference from embodiment 1 is that: the controller 18 is also connected with engine start unit, works as reception
When the unlocked dead letter of parking braking sent to parking braking unit, controller 18 does not execute down the instruction turned over；Engine start
Unit issues Engine Start Signal to controller 18, and controller 18 judges ladder according to the position sensor 3 on hydraulic cylinder 2
State, if ladder, which is in, turns over completion status, controller 18 does not execute operation；It turns over completion if ladder is in down or is turning over
State, controller 18, which then issues, turns over signal to the first control valve 16, and execution is turned over movement by ladder ontology 1；When hydraulic cylinder 2
Piston rod when leading to the position demarcated, the position sensor 3 on hydraulic cylinder 2 sends a signal to controller 18, controls
Device 18 controls the access of the first control valve 16 cutting hydraulic pump 13 and hydraulic cylinder 2, while indicator light 6 extinguishes, buzzer 17 stops
It only works, completion is turned over, referring specifically to Fig. 5.
Embodiment 4
The present invention provides a kind of control methods based on hydraulic overturning ladder described in first aspect, comprising:
Controller 18 receives the output signal that switch unit, parking braking unit and engine start unit are sent in vehicle；
Controller 18 sends corresponding control signal to the first control valve 16 according to the signal received, realizes and drives the ladder
Ontology 1.
Specifically:
When the parking braking that controller 18 receives the transmission of parking braking unit locks signal, starts the switch unit, refer to
Show that lamp 6 is bright, buzzer 17 works immediately, controller 18 sends electric signal to according to the delay time (such as 5 seconds) of setting afterwards
One control valve 16, hydraulic oil through filter 14, preferentially give 15 filling liquid of accumulator, energy storage after the output of hydraulic pump 13, then again into
Enter the first control valve 16.
When control ladder ontology 1 turns over, first control valve 16 controls the second oil that hydraulic oil enters hydraulic cylinder 2
In chamber (i.e. big oil pocket), the first oil pocket (i.e. small oil cavity) of hydraulic cylinder 2 is connected through the first control valve 16 with fuel tank, realizes hydraulic
The extraction of oil cylinder 2 acts, and ladder turns over, and when the piston rod of hydraulic cylinder 2 leads to the position demarcated, position sensor 3 is sent out
The number of delivering letters is controlled the access of the first control valve 16 cutting hydraulic pump 13 and hydraulic cylinder 2 by controller 18, simultaneously to controller 18
Indicator light 6 extinguishes, buzzer 17 stops working, and completes to turn over；When control turned under ladder ontology 1 when, first control valve 16
Control hydraulic oil enters the first oil pocket of hydraulic cylinder 2, and the second oil pocket of hydraulic cylinder 2 is through the first control valve 16 and fuel tank phase
Even, it realizes the retract action of hydraulic cylinder 2, is turned under ladder, when the piston rod of hydraulic cylinder 2 is retracted to the position demarcated, position
It sets sensor 3 and sends a signal to controller 18, controller 18 controls the first control valve 16 cutting hydraulic pump 13 and hydraulic cylinder 2
Access turns under completion.
When the parking braking that controller 18 receives the transmission of parking braking unit locks signal, if ladder ontology 1 is
It turns over, then starts switch unit (press to turn over or stir under rocker switch 5 and turn under girl's switch 19), controlled using controller 18
First control valve 16 changes hydraulic cylinder 2 into, oil return direction, and the piston rod of hydraulic cylinder 2 is retracted, turned under ladder；If ladder sheet
Body 1 turns over down, then starts switch unit, controls the first control valve 16 using controller 18 and changes hydraulic cylinder 2 into, oil return side
To the piston rod of hydraulic cylinder 2 is drawn, and ladder turns over, and overturning terminates the extinguishing of rear indicator light 6, buzzer 17 stops working.
Preferably, the method also includes:
The control handle 7 being connected with the second control valve is operated, the hydraulic oil in the hydraulic cylinder 2 is sequentially through hydraulic cylinder 2
The first oil pocket, the second oil pocket, fuel tank is flowed into after the second control valve, discharge the pressure in hydraulic pressure unit.
In conclusion hydraulic overturning ladder and control method in the present invention, drive indoor rocker switch by being set to
It is flexible with girl's switch control hydraulic cylinder of control cabinet, to drive spinning upside down for ladder ontology.In hydraulic pressure unit
Hydraulic oil is exported by hydraulic pump, through filter, is preferentially given accumulator filling liquid, energy storage, is entered back into the first control valve.First control valve
Control hydraulic oil enters the first oil pocket or the second oil pocket (i.e. big chamber or small chamber) of hydraulic cylinder, while an other chamber and fuel tank phase
It is logical, realize the extraction or retract action of hydraulic cylinder, ladder turn over or under turn over.When engine does not start, hydraulic pump is unpowered
Output, accumulator self electromagnetism valve is connected at this time, and reservoir pressure oil will provide hydraulic system power, and hydraulic cylinder executes related dynamic
Make.Except driving, girl's switch of indoor rocker switch and control cabinet is outer, separately there is control handle realization in emergency circumstances ladder
Artificial overturning.The control of hydraulic overturning ladder of the invention is related to parking braking and engine start.When parking braking is locked
When, it can the overturning of normal control ladder；When parking braking is not locked, do not allow to turn under ladder；Ladder, which is not in, turns over completion
Start engine when state, ladder will turn over automatically.Have in driver's cabin in ladder switching process indicator light and ground buzzer into
Row operation indicating.When control system breaks down, indicator light carries out flashing alarm in driver's cabin.Land leveller of the invention is hydraulic to be turned over
Turn ladder and control method includes mechanical, electrical, liquid integrated control, realizes the intelligent control that driver's cabin ladder is spun upside down, improve
It gets on the bus comfort, avoids perching knife revolution when work from breaking ladder, and reduce security risk.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (10)
1. a kind of hydraulic overturning ladder characterized by comprising
Ladder ontology；
Hydraulic pressure unit, the hydraulic pressure unit include hydraulic pump, accumulator, the first control valve, hydraulic cylinder and the second control valve, institute
The output end for stating hydraulic pump is connected with the first hydraulic fluid port of the hydraulic fluid port of accumulator and the first control valve respectively；First control valve
The second hydraulic fluid port be connected with the first oil pocket of hydraulic cylinder, third hydraulic fluid port pass through second control valve and hydraulic cylinder the
Two oil pockets are connected, and the 4th hydraulic fluid port is connected with fuel tank；The piston rod end of the hydraulic cylinder passes through first rotating shaft and ladder sheet
Body is connected；
Controller, the controller receive the output signal that switch unit and parking braking unit issue in vehicle, and according to connecing
The signal received sends corresponding control signal to the first control valve, realizes and drives the ladder ontology.
2. a kind of hydraulic overturning ladder according to claim 1, it is characterised in that: further include control handle, the control
Handle is connected with second control valve, and second control valve is also connected with fuel tank；
When operating the control handle, hydraulic oil in the hydraulic cylinder sequentially through hydraulic cylinder the first oil pocket,
Fuel tank is flowed into after two oil pockets, the second control valve, discharges the pressure in hydraulic pressure unit.
3. a kind of hydraulic overturning ladder according to claim 1, it is characterised in that: the hydraulic system further includes filtering
Device, the input terminal of the filter are connected with the output end of the hydraulic pump, the output end hydraulic fluid port with the accumulator respectively
It is connected with the first hydraulic fluid port of the first control valve.
4. a kind of hydraulic overturning ladder according to claim 1, it is characterised in that: the switch unit includes rocker switch
It is switched with girl；The hydraulic overturning ladder further includes the position sensor for monitoring the position of ladder ontology, the position
The output end of sensor is connected with the controller.
5. a kind of hydraulic overturning ladder according to claim 4, it is characterised in that: sent when receiving parking braking unit
Parking braking when locking signal, start the switch unit, controller sends electric signal extremely according to after the delay time of setting
First control valve, hydraulic oil preferentially give accumulator filling liquid, energy storage after hydraulic pump exports, then enter back into the first control valve.
6. a kind of hydraulic overturning ladder according to claim 4, it is characterised in that: when control ladder ontology turns over, institute
It states the first control valve control hydraulic oil to enter in the second oil pocket of hydraulic cylinder, the first oil pocket of hydraulic cylinder is through the first control valve
It is connected with fuel tank, realizes the extraction movement of hydraulic cylinder, ladder turns over, and the piston rod of hydraulic cylinder leads to the position demarcated
When, position sensor sends a signal to controller, controls the logical of the first control valve cutting hydraulic pump and hydraulic cylinder by controller
Road completes to turn over；
When control turned under ladder ontology when, first control valve control hydraulic oil enters the first oil pocket of hydraulic cylinder, hydraulic
Second oil pocket of oil cylinder is connected through the first control valve with fuel tank, realizes the retract action of hydraulic cylinder, turns under ladder, hydraulic cylinder
Piston rod when being retracted to the position demarcated, position sensor sends a signal to controller, and controller controls the first control valve
The access for cutting off hydraulic pump and hydraulic cylinder, is turned under completion.
7. a kind of hydraulic overturning ladder according to claim 1, it is characterised in that: sent when receiving parking braking unit
Parking braking lock signal when, if ladder ontology is turning over, start switch unit, utilize controller control first control
Valve changes hydraulic cylinder into, oil return direction, and the piston rod of hydraulic cylinder is retracted, turned under ladder；If ladder ontology turns over down,
Unit is started switch, the first control valve is controlled using controller and changes hydraulic cylinder into, oil return direction, the piston rod of hydraulic cylinder
It draws, ladder turns over.
8. a kind of hydraulic overturning ladder according to claim 1, it is characterised in that: sent when receiving parking braking unit
The parking braking unlocked dead letter when, controller does not execute down the instruction turned over；Engine start unit issues engine start letter
Number to controller, controller judges ladder state according to the position sensor on hydraulic cylinder, if ladder, which is in turn over, completes shape
State, then controller does not execute operation；It turns over completion if ladder is in down or is turning over state, controller sending turns over signal extremely
Execution is turned over movement by the first control valve, ladder ontology；It is hydraulic when the piston rod of hydraulic cylinder leads to the position demarcated
Position sensor on oil cylinder sends a signal to controller, and controller controls the first control valve cutting hydraulic pump and hydraulic cylinder
Access turns over completion.
9. a kind of control method of hydraulic overturning ladder of any of claims 1-8 characterized by comprising
Controller receives the output signal that switch unit, parking braking unit and engine start unit are sent in vehicle；
Controller sends corresponding control signal to the first control valve according to the signal received, realizes and drives the ladder sheet
Body.
10. the control method of the hydraulic overturning ladder of one kind according to claim 9, which is characterized in that the method is also wrapped
Include: the control handle that is connected with the second control valve of operation, hydraulic oil in the hydraulic cylinder sequentially through hydraulic cylinder the
Fuel tank is flowed into after one oil pocket, the second oil pocket, the second control valve, discharges the pressure in hydraulic pressure unit.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110878571A (en) * | 2019-12-13 | 2020-03-13 | 中铁工程机械研究设计院有限公司 | Swing ladder safety control system for electric shovel |
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| EP0154069A2 (en) * | 1984-03-08 | 1985-09-11 | Merryweather And Sons Limited | A control system for an elevatable and extendible structure |
| CN201026990Y (en) * | 2007-02-15 | 2008-02-27 | 天津工程机械研究院 | Elevator car gate ladder |
| CN208149466U (en) * | 2018-04-09 | 2018-11-27 | 山东师范大学 | A kind of lorry with SOS emergency braking system |
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| CN208634509U (en) * | 2018-08-08 | 2019-03-22 | 安徽唐兴机械装备有限公司 | A kind of hydraulic system corrected for rectangular pipe jacking machine posture and quickly take off pipe |
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| DE3200356A1 (en) * | 1981-02-16 | 1982-12-09 | VEB Feuerlöschgerätewerk Luckenwalde, DDR 1710 Luckenwalde | Control device for the remote control of turntable ladders and mobile work platforms |
| EP0154069A2 (en) * | 1984-03-08 | 1985-09-11 | Merryweather And Sons Limited | A control system for an elevatable and extendible structure |
| CN201026990Y (en) * | 2007-02-15 | 2008-02-27 | 天津工程机械研究院 | Elevator car gate ladder |
| CN208470075U (en) * | 2018-01-09 | 2019-02-05 | 上海海大技术转移有限公司 | Automatic turning gangway ladder peculiar to vessel |
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| CN208634509U (en) * | 2018-08-08 | 2019-03-22 | 安徽唐兴机械装备有限公司 | A kind of hydraulic system corrected for rectangular pipe jacking machine posture and quickly take off pipe |
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| CN110878571A (en) * | 2019-12-13 | 2020-03-13 | 中铁工程机械研究设计院有限公司 | Swing ladder safety control system for electric shovel |
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