CN107859664B - Walking and support oil cylinder linkage - Google Patents
Walking and support oil cylinder linkage Download PDFInfo
- Publication number
- CN107859664B CN107859664B CN201711108098.2A CN201711108098A CN107859664B CN 107859664 B CN107859664 B CN 107859664B CN 201711108098 A CN201711108098 A CN 201711108098A CN 107859664 B CN107859664 B CN 107859664B
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- Prior art keywords
- reversal valve
- mouth
- mouthfuls
- pressure
- gas control
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/22—Synchronisation of the movement of two or more servomotors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/07572—Propulsion arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0262—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being hydraulic
- F16H61/0265—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being hydraulic for gearshift control, e.g. control functions for performing shifting or generation of shift signals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
-
- 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
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
-
- 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
- F15B2211/782—Concurrent control, e.g. synchronisation of two or more actuators
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Transportation (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Civil Engineering (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
It is a kind of to walk and support oil cylinder linkage, including fuel tank, hydraulic pump, stabilizer blade oil cylinder, gear-selecting cylinder, manual pneumatic reversal valve, gas bag and block selecting operation valve, the first gas control pressure switch, the second gas control pressure switch, electromagnetic hydraulic pressure reversal valve, master controller, first pressure sensor and second pressure sensor；A mouthfuls of mouth of execution of electromagnetic hydraulic pressure reversal valve are connected to the rodless cavity of stabilizer blade oil cylinder and first pressure sensor respectively, and B mouthfuls of mouth of execution of electromagnetic hydraulic pressure reversal valve are connected to the rod chamber of stabilizer blade oil cylinder and second pressure sensor respectively；A mouthfuls of the execution mouth of manual pneumatic reversal valve is connected to the rodless cavity of gear-selecting cylinder and the first gas control pressure switch respectively, and B mouthfuls of the execution mouth of manual pneumatic reversal valve is connected to the rod chamber of gear-selecting cylinder and the second gas control pressure switch respectively；First gas control pressure switch, the second gas control pressure switch, first pressure sensor, second pressure sensor and electromagnetic hydraulic pressure reversal valve are electrically connected with master controller.The present invention is highly-safe.
Description
Technical field
The present invention relates to a kind of Side Fork Lift Trucks, in particular to the walking of a kind of Side Fork Lift Trucks and support oil cylinder linkage.
Background technique
Door frame, lifting mechanism and the pallet fork of Side Fork Lift Trucks are located at the middle part of fork truck, can move along cross slide way.Pallet fork
Positioned at the side of fork truck, there are also a cargo stages for side.When pallet fork rises above cargo stage height along door frame, door frame
It is retracted along guide rail, falls pallet fork, cargo is just placed on the cargo stage of fork truck.The door frame and pallet fork of Side Fork Lift Trucks are in car body one
Side.Side Fork Lift Trucks during the work time, needs gas operation manual operating valve to stretch out support oil cylinder after driver's parking at present
It is supported in ground, can play the role of promoting lateral stability in this way in raising cargo；It is necessary when vehicle needs to walk
First support oil cylinder is withdrawn.But no operation manual operating valve will after driver's parking in actual operation, often occurs
Support oil cylinder stretching is supported in ground and forgets support oil cylinder packing up the case where travelling of just putting into gear after cargo is put into load bed,
There can be serious security risk in this way.The walking mechanism of the prior art including gear-selecting cylinder 4, manual pneumatic as shown in Figure 1, change
To valve 5, gas bag 6 and block selecting operation valve 7；P mouthfuls of air inlet of manual pneumatic reversal valve 5 are connected to gas bag 6, manual pneumatic reversal valve
A mouthfuls of mouth of execution of 5 are connected to the rodless cavity of gear-selecting cylinder 4, and B mouthfuls of the execution mouth of manual pneumatic reversal valve 5 has with gear-selecting cylinder 4
Rod cavity connection；The operating stick 7-1 of block selecting operation valve 7 is fixedly connected with the piston rod 4-1 of gear-selecting cylinder 4；Block selecting operation valve 7 is used to
Forward gear, retreating gear and the neutral gear for selecting fork truck make manual pneumatic reversal valve 5 when driver's operation manual pneumatic reversal valve 5
P mouthfuls of air inlet with when executing mouth A mouthfuls and communicating, when the rodless cavity of gear-selecting cylinder 4 is passed through pressed gas, before block selecting operation valve 7 is hung over
Into blocking；When driver operates manual pneumatic reversal valve 5, make mouth B mouthfuls of phase of P mouthful of the air inlet of manual pneumatic reversal valve 5 and execution
When logical, the rod chamber of gear-selecting cylinder 4 is passed through pressed gas, and block selecting operation valve 7 is hung in retreating gear；When driver manipulator takes offence
Reversal valve 5 is pressed, when making P mouthfuls of air inlet of manual pneumatic reversal valve 5 to be not communicated with mouth B mouthfuls of mouth A mouthfuls of execution and execution, block selecting gas
The rodless cavity and rod chamber of cylinder 4 are not passed through pressed gas, and block selecting operation valve 7 is hung in neutral gear.The support oil cylinder of the prior art
Mechanism is as shown in Fig. 2, include fuel tank 1, hydraulic pump 2, support oil cylinder 3 and manual operating valve 30, the oil inlet and fuel tank of hydraulic pump 2
1 connection, the oil outlet of hydraulic pump 2 is connected to the oil inlet P mouth of manual operating valve 30, A mouthfuls of the execution mouth of manual operating valve 30 and
The rodless cavity of support oil cylinder 3 is connected to, and B mouthfuls of mouth of execution of manual operating valve 30 are connected to the rod chamber of support oil cylinder 3, works as driver
Manual operating valve 30 is operated, when communicating the oil inlet P mouth for operating manual operating valve 30 with mouth A mouthfuls of execution, the work of support oil cylinder 3
Stopper rod 3-2 stretches out, and support oil cylinder 3 is supported in ground；When driver's operation manual operating valve 30, make to operate manual operating valve 30
When oil inlet P mouth is communicated with mouth B mouthfuls of execution, the piston rod 3-2 of support oil cylinder 3 is retracted, and support oil cylinder 3 leaves ground.
Summary of the invention
It is an object of the invention to propose a kind of highly-safe walking and support oil cylinder linkage.
In order to achieve the above objectives, the present invention adopts the following technical scheme that: it is a kind of to walk and support oil cylinder linkage, including
Fuel tank, hydraulic pump, support oil cylinder, gear-selecting cylinder, manual pneumatic reversal valve, gas bag and block selecting operation valve；The hydraulic pump into
Hydraulic fluid port is connected to fuel tank；P mouthfuls of air inlet of the manual pneumatic reversal valve are connected to gas bag；It further include that the first gas control pressure is opened
Pass, the second gas control pressure switch, electromagnetic hydraulic pressure reversal valve, master controller, first pressure sensor and second pressure sensor；Institute
The oil outlet for stating hydraulic pump is connected to the oil inlet P mouth of electromagnetic hydraulic pressure reversal valve, A mouthfuls of difference of execution mouth of electromagnetic hydraulic pressure reversal valve
It is connected to the rodless cavity of support oil cylinder and first pressure sensor, B mouthfuls of the execution mouth of electromagnetic hydraulic pressure reversal valve is oily with supporting leg respectively
The rod chamber of cylinder is connected to second pressure sensor；A mouthfuls of the execution mouth of the manual pneumatic reversal valve respectively with gear-selecting cylinder
The air control port of rodless cavity and the first gas control pressure switch connection, B mouthfuls of the execution mouth of manual pneumatic reversal valve respectively with gear-selecting cylinder
Rod chamber and the second gas control pressure switch air control port connection；The operating stick of the block selecting operation valve and the piston of gear-selecting cylinder
Bar is fixedly connected；The first gas control pressure switch, the second gas control pressure switch, first pressure sensor, second pressure sensing
The terminals K1 and terminals K2 of device and electromagnetic hydraulic pressure reversal valve are electrically connected with master controller；When the first gas control pressure switch or
When second gas control pressure switch is closed, obtained by the terminals K1 of main controller controls electromagnetic hydraulic pressure reversal valve electric, electromagnetic hydraulic pressure changes
It is connected to for mouth B mouthfuls to the oil inlet P mouth of valve with execution；When the first gas control pressure switch and the second gas control pressure switch disconnect,
It is obtained by the terminals K2 of main controller controls electromagnetic hydraulic pressure reversal valve electric；The oil inlet P mouth and execution mouth A of electromagnetic hydraulic pressure reversal valve
Mouth connection；When the pressure value of first pressure sensor or second pressure sensor reaches the setting value of master controller, by master control
The terminals K1 and terminals K2 of device control electromagnetic hydraulic pressure reversal valve processed must not be electric, the oil inlet P mouth of electromagnetic hydraulic pressure reversal valve
It is not communicated with executing mouth A mouthfuls and executing mouth B mouthfuls.
The oil inlet of the hydraulic pump to the oily channel of fuel tank is equipped with filter.
The oil outlet of the hydraulic pump to the oily channel of fuel tank is equipped with safety valve.
The present invention has following good effect: (1) due to the oil outlet of hydraulic pump of the invention and electromagnetic hydraulic pressure reversal valve
The connection of oil inlet P mouth, A mouthfuls of mouth of executions of electromagnetic hydraulic pressure reversal valve are connected to the rodless cavity of support oil cylinder, and electromagnetic hydraulic pressure commutates
B mouthfuls of mouth of execution of valve are connected to the rod chamber of support oil cylinder；A mouthfuls of the execution mouth of the manual pneumatic reversal valve respectively with block selecting gas
The air control port of the rodless cavity of cylinder and the first gas control pressure switch connection, B mouthfuls of the execution mouth of manual pneumatic reversal valve respectively with block selecting
The connection of the air control port of the rod chamber of cylinder and the second gas control pressure switch；The first gas control pressure switch, the second gas control pressure
The terminals K1 and terminals K2 of switch and electromagnetic hydraulic pressure reversal valve are electrically connected with master controller；When the first gas control pressure switch
Or when the second gas control pressure switch closure, electric, electromagnetic hydraulic pressure is obtained by the terminals K1 of main controller controls electromagnetic hydraulic pressure reversal valve
The oil inlet P mouth of reversal valve is connected to for mouth B mouthfuls with execution；When the first gas control pressure switch and the second gas control pressure switch disconnect
When, it is obtained by the terminals K2 of main controller controls electromagnetic hydraulic pressure reversal valve electric；The oil inlet P mouth of electromagnetic hydraulic pressure reversal valve and execution
A mouthfuls of connections of mouth.Thus when driver needs to stop, manual pneumatic reversal valve 5 is operated, hangs over block selecting operation valve 7 in neutral gear.
The air control port of the air control port of first gas control pressure switch 8 and the second gas control pressure switch 9 is not passed through pressed gas, the first gas control
Pressure switch 8 and the second gas control pressure switch 9 are in off-state, and at this moment master controller 11 controls electromagnetic hydraulic pressure reversal valve 10
Terminals K2 obtain it is electric, the oil inlet P mouth of electromagnetic hydraulic pressure reversal valve 10 with execute mouth A mouthfuls and communicate, the pressure oil of hydraulic pump 2 enters branch
The piston rod 3-2 of the rodless cavity of leg oil cylinder 3, support oil cylinder 3 stretches out, and support oil cylinder 3 is supported in ground, thus after driver's parking
Support oil cylinder 3 can be automatically supported on ground, play the role of promoting lateral stability in raising cargo, such safety is very
It is high.When fork truck needs to walk, driver operates manual pneumatic reversal valve 5, and block selecting operation valve 7 is made to hang over forward gear or retreating gear
On.The air control port of the air control port of first gas control pressure switch 8 or the second gas control pressure switch 9 is also passed into pressed gas, the first gas
Governor pressure switch 8 or the second gas control pressure switch 9 are in closed state, and at this moment master controller 11 controls electromagnetic hydraulic pressure reversal valve 10
Terminals K1 obtain it is electric, the oil inlet P mouth of electromagnetic hydraulic pressure reversal valve 10 with execute mouth B mouthfuls and communicate, the pressure oil of hydraulic pump 2 enters branch
The rod chamber of leg oil cylinder 3, the piston rod 3-2 of support oil cylinder 3 are retracted, and support oil cylinder 3 leaves ground, thus driver puts into gear traveling
Rear support leg oil cylinder 3 can leave ground automatically, and such safety is very high.
Detailed description of the invention
Fig. 1 is the walking mechanism schematic diagram of the prior art.
Fig. 2 is the support oil cylinder mechanism principle figure of the prior art.
Fig. 3 is the principle of the present invention figure.
Appended drawing reference in above-mentioned attached drawing is as follows: fuel tank 1, hydraulic pump 2, support oil cylinder 3, piston rod 3-2, gear-selecting cylinder 4,
Piston rod 4-1, manual pneumatic reversal valve 5, gas bag 6, block selecting operation valve 7, operating stick 7-1, the first gas control pressure switch 8, second
Gas control pressure switch 9, electromagnetic hydraulic pressure reversal valve 10, master controller 11, first pressure sensor 12, second pressure sensor 13,
Filter 14, safety valve 15.
Specific embodiment
As shown in figure 3, a kind of walking and support oil cylinder linkage, including fuel tank 1, hydraulic pump 2, support oil cylinder 3, block selecting
Cylinder 4, manual pneumatic reversal valve 5, gas bag 6 and block selecting operation valve 7；The oil inlet of the hydraulic pump 2 is connected to fuel tank 1；It is described
P mouthfuls of air inlet of manual pneumatic reversal valve 5 are connected to gas bag 6；It further include that the first gas control pressure switch 8, the second gas control pressure are opened
Close 9, electromagnetic hydraulic pressure reversal valve 10, master controller 11, first pressure sensor 12 and second pressure sensor 13；The hydraulic pump
2 oil outlet is connected to the oil inlet P mouth of electromagnetic hydraulic pressure reversal valve 10, A mouthfuls of the execution mouth of electromagnetic hydraulic pressure reversal valve 10 respectively with
The rodless cavity of support oil cylinder 3 is connected to first pressure sensor 12, B mouthfuls of the execution mouth of electromagnetic hydraulic pressure reversal valve 10 respectively with supporting leg
The rod chamber of oil cylinder 3 is connected to second pressure sensor 13；A mouthfuls of the execution mouth of the manual pneumatic reversal valve 5 respectively with block selecting
The air control port of the rodless cavity of cylinder 4 and the first gas control pressure switch 8 connection, B mouthfuls of the execution mouth of manual pneumatic reversal valve 5 respectively with
The connection of the air control port of the rod chamber of gear-selecting cylinder 4 and the second gas control pressure switch 9；The operating stick 7-1 of the block selecting operation valve 7 with
The piston rod 4-1 of gear-selecting cylinder 4 is fixedly connected；The first gas control pressure switch 8, the second gas control pressure switch 9, first pressure
The terminals K1 and terminals K2 of sensor 12, second pressure sensor 13 and electromagnetic hydraulic pressure reversal valve 10 with master controller 11
Electrical connection；When the air control port of the first gas control pressure switch 8 is passed through pressed gas, the first gas control pressure switch 8 closure；When second
When the air control port of gas control pressure switch 9 is passed through pressed gas, the second gas control pressure switch 9 closure.When the first gas control pressure switch 8
Or when the second closure of gas control pressure switch 9, electric, electromagnetism is obtained by the terminals K1 that master controller 11 controls electromagnetic hydraulic pressure reversal valve 10
The oil inlet P mouth of hydraulicdirectional control valve 10 is connected to for mouth B mouthfuls with execution；When the first gas control pressure switch 8 and the second gas control pressure switch 9
When disconnecting, obtained by the terminals K2 that master controller 11 controls electromagnetic hydraulic pressure reversal valve 10 electric；Electromagnetic hydraulic pressure reversal valve 10 into
P mouthfuls of hydraulic fluid port with execute mouth A mouthfuls and be connected to；When the pressure value of first pressure sensor 12 or second pressure sensor 13 reaches main control
, must not be electric by terminals K1 and terminals K2 that master controller 11 controls electromagnetic hydraulic pressure reversal valve 10 when the setting value of device 11,
The oil inlet P mouth of electromagnetic hydraulic pressure reversal valve 10 is not communicated with mouth B mouthfuls of mouth A mouthfuls of execution and execution.Master controller 11 is PLC control
Device.
The oil inlet of the hydraulic pump 2 to the oily channel of fuel tank 1 is equipped with filter 14.
The oil outlet of the hydraulic pump 2 to the oily channel of fuel tank 1 is equipped with safety valve 15.
The course of work of the invention is as follows: when driver needs to stop, operating manual pneumatic reversal valve 5, makes manual gas
P mouthfuls of air inlet of reversal valve 5 are pressed to be not communicated with mouth B mouthfuls of mouth A mouthfuls of execution and execution, the rodless cavity and rod chamber of gear-selecting cylinder 4
It is not passed through pressed gas, block selecting operation valve 7 is hung in neutral gear.The air control port and the second gas of first gas control pressure switch 8 simultaneously
The air control port of governor pressure switch 9 is not passed through pressed gas, and the first gas control pressure switch 8 and the second gas control pressure switch 9 exist
Off-state, at this moment master controller 11 control electromagnetic hydraulic pressure reversal valve 10 terminals K2 obtain it is electric, electromagnetic hydraulic pressure reversal valve 10
Oil inlet P mouth communicates for mouth A mouthfuls with execution, and the pressure oil of hydraulic pump 2 enters the rodless cavity of support oil cylinder 3, the piston of support oil cylinder 3
Bar 3-2 stretches out, and support oil cylinder 3 is supported in ground, thus driver's parking rear support leg oil cylinder 3 can be automatically supported on ground, rise
Play the role of promoting lateral stability when rising cargo, such safety is very high.When the piston rod 3-2 of support oil cylinder 3 stretches completely
After out, the pressure oil of hydraulic pump 2 still will continue to the rodless cavity into support oil cylinder 3, at this moment pressure in the rodless cavity of support oil cylinder 3
It just will increase, while the pressure value of first pressure sensor 12 also will increase, when the pressure value of first pressure sensor 12 reaches
When the setting value of master controller 11, the terminals K1 and terminals K2 that master controller 11 controls electromagnetic hydraulic pressure reversal valve 10 must not
Electricity, oil inlet P mouth and mouth B mouthfuls of mouth A mouthfuls of the execution and execution of such electromagnetic hydraulic pressure reversal valve 10 are not communicated with, the pressure of hydraulic pump 2
Power oil does not enter back into the rodless cavity of support oil cylinder 3.
When fork truck needs to walk, driver operates manual pneumatic reversal valve 5, makes the air inlet P of manual pneumatic reversal valve 5
Mouthful with execute that mouth A mouthfuls communicates or make manual pneumatic reversal valve 5 P mouthfuls of air inlet with execution mouth B mouthfuls communicate, the nothing of gear-selecting cylinder 4
Rod cavity or rod chamber are passed through pressed gas, and block selecting operation valve 7 is hung in forward gear or retreating gear.First gas control pressure switch simultaneously
The air control port of 8 air control port or the second gas control pressure switch 9 is also passed into pressed gas, the first gas control pressure switch 8 or the second gas
For governor pressure switch 9 in closed state, the terminals K1 that at this moment master controller 11 controls electromagnetic hydraulic pressure reversal valve 10 obtains electric, electromagnetic liquid
The oil inlet P mouth of reversal valve 10 is pressed to communicate for mouth B mouthfuls with execution, the pressure oil of hydraulic pump 2 enters the rod chamber of support oil cylinder 3, branch
The piston rod 3-2 of leg oil cylinder 3 is retracted, and support oil cylinder 3 leaves ground, thus driver put into gear travel rear support leg oil cylinder 3 can be automatic
Ground is left, such safety is very high.After the piston rod 3-2 of support oil cylinder 3 is fully retracted, the pressure oil of hydraulic pump 2 still can
The rod chamber of support oil cylinder 3 is gone successively to, at this moment pressure just will increase in the rod chamber of support oil cylinder 3, while second pressure passes
The pressure value of sensor 13 also will increase, main when the pressure value of second pressure sensor 13 reaches the setting value of master controller 11
The terminals K1 and terminals K2 that controller 11 controls electromagnetic hydraulic pressure reversal valve 10 must not be electric, such electromagnetic hydraulic pressure reversal valve 10
Oil inlet P mouth with execute mouth A mouthful and execution mouth B mouthfuls be not communicated with, the pressure oil of hydraulic pump 2 does not enter back into support oil cylinder 3
Rod chamber.
The above various embodiments and application examples are the explanations to a specific embodiment of the invention, rather than to limit of the invention
System, person skilled in the relevant technique without departing from the spirit and scope of the present invention, can also make various changes
Change and change and obtain corresponding equivalent technical solution, thus all equivalent technical solutions should be included into it is of the invention
Scope of patent protection.
Claims (3)
1. a kind of walking and support oil cylinder linkage, including fuel tank (1), hydraulic pump (2), support oil cylinder (3), gear-selecting cylinder
(4), manual pneumatic reversal valve (5), gas bag (6) and block selecting operation valve (7)；The oil inlet of the hydraulic pump (2) and fuel tank (1) are even
It is logical；P mouthfuls of air inlet of the manual pneumatic reversal valve (5) are connected to gas bag (6)；It is characterized by also including the first gas control pressures
Power switchs (8), the second gas control pressure switch (9), electromagnetic hydraulic pressure reversal valve (10), master controller (11), first pressure sensor
(12) and second pressure sensor (13)；The oil outlet of the hydraulic pump (2) and the oil inlet P mouth of electromagnetic hydraulic pressure reversal valve (10)
Connection, A mouthfuls of the execution mouth of electromagnetic hydraulic pressure reversal valve (10) rodless cavity and first pressure sensor with support oil cylinder (3) respectively
(12) it is connected to, B mouthfuls of the execution mouth of electromagnetic hydraulic pressure reversal valve (10) is sensed with the rod chamber of support oil cylinder (3) and second pressure respectively
Device (13) connection；A mouthfuls of the execution mouth of the manual pneumatic reversal valve (5) respectively with the rodless cavity and the first gas of gear-selecting cylinder (4)
Governor pressure switchs the air control port connection of (8), and B mouthfuls of the execution mouth of manual pneumatic reversal valve (5) has bar with gear-selecting cylinder (4) respectively
The connection of the air control port of chamber and the second gas control pressure switch (9)；The operating stick (7-1) and gear-selecting cylinder of the block selecting operation valve (7)
(4) piston rod (4-1) is fixedly connected；The first gas control pressure switch (8), the second gas control pressure switch (9), first pressure
The terminals K1 and terminals K2 of sensor (12), second pressure sensor (13) and electromagnetic hydraulic pressure reversal valve (10) are and master control
Device (11) electrical connection processed；When the first gas control pressure switch (8) or the second gas control pressure switch (9) are closed, by master controller
(11) the terminals K1 for controlling electromagnetic hydraulic pressure reversal valve (10) obtains electric, the oil inlet P mouth of electromagnetic hydraulic pressure reversal valve (10) and execution
B mouthfuls of connections of mouth；When the first gas control pressure switch (8) and the second gas control pressure switch (9) disconnect, controlled by master controller (11)
The terminals K2 of electromagnetic hydraulic pressure reversal valve (10) processed obtains electric；The mouth A mouthfuls of company of oil inlet P mouth and execution of electromagnetic hydraulic pressure reversal valve (10)
It is logical；When the pressure value of first pressure sensor (12) or second pressure sensor (13) reaches the setting value of master controller (11)
When, it must not be electric by the terminals K1 and terminals K2 of master controller (11) control electromagnetic hydraulic pressure reversal valve (10), electromagnetic hydraulic pressure
The oil inlet P mouth of reversal valve (10) is not communicated with mouth B mouthfuls of mouth A mouthfuls of execution and execution.
2. it is according to claim 1 walking and support oil cylinder linkage, it is characterised in that: the hydraulic pump (2) into
Hydraulic fluid port to the oily channel of fuel tank (1) is equipped with filter (14).
3. walking according to claim 1 and support oil cylinder linkage, it is characterised in that: the hydraulic pump (2) goes out
Hydraulic fluid port to the oily channel of fuel tank (1) is equipped with safety valve (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711108098.2A CN107859664B (en) | 2017-11-10 | 2017-11-10 | Walking and support oil cylinder linkage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711108098.2A CN107859664B (en) | 2017-11-10 | 2017-11-10 | Walking and support oil cylinder linkage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107859664A CN107859664A (en) | 2018-03-30 |
| CN107859664B true CN107859664B (en) | 2019-07-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711108098.2A Active CN107859664B (en) | 2017-11-10 | 2017-11-10 | Walking and support oil cylinder linkage |
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| CN (1) | CN107859664B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110255446A (en) * | 2019-06-26 | 2019-09-20 | 袁菊花 | The support leg device of electri forklift |
| CN112855650B (en) * | 2019-11-27 | 2023-01-17 | 河北雷萨重型工程机械有限责任公司 | Landing leg hydraulic control system and crane |
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| CN105782146B (en) * | 2016-05-28 | 2017-08-04 | 李淑君 | The lifting control system of dumper |
| CN108357353A (en) * | 2016-05-31 | 2018-08-03 | 吴彬 | Opening door of vehicle forbids running gear and its control mechanism |
| CN106121831B (en) * | 2016-08-02 | 2018-10-26 | 江苏润杨汽车零部件制造有限公司 | A kind of throttle of vehicle, gear, exhaust brake combined control system |
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2017
- 2017-11-10 CN CN201711108098.2A patent/CN107859664B/en active Active
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