CN106976825B - Bypass the scissor aerial work platform hydraulic control system of off-load electromagnetic direct-drive - Google Patents
Bypass the scissor aerial work platform hydraulic control system of off-load electromagnetic direct-drive Download PDFInfo
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- CN106976825B CN106976825B CN201710212583.8A CN201710212583A CN106976825B CN 106976825 B CN106976825 B CN 106976825B CN 201710212583 A CN201710212583 A CN 201710212583A CN 106976825 B CN106976825 B CN 106976825B
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- valve
- drive
- electromagnetic direct
- walking
- main valve
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
- B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
- B66F11/042—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations actuated by lazy-tongs mechanisms or articulated levers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/10—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of fluid gearing
-
- 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
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
- B66F7/08—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement hydraulically or pneumatically operated
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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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
Abstract
The present invention relates to hydraulic devices, more particularly to a kind of scissor aerial work platform hydraulic control system for bypassing off-load electromagnetic direct-drive, it include lifting control module, course changing control module, travelling control module, course changing control module includes electromagnetic direct-drive switching valve, electromagnetic direct-drive switching valve by steering main valve plug, be arranged in turn to main valve plug control terminal left steering electromagnet and right turn electromagnet form, it turns to main valve plug and is equipped with bypass unloading channel, neutral position off-load；Travelling control module includes electromagnetic direct-drive walking valve, and walking main valve plug is equipped with bypass unloading channel, neutral position off-load.The present invention realizes thread cartridge solenoid valve function using switch electromagnet and the combination of multi-pass type main valve, so that solenoid valve internal structure relative simplicity, reduces requirement on machining accuracy, reduces installation and after cost.By switch electromagnet and multi-pass type main valve Combination Design, oil circuit pressure loss can be suitably reduced, improves the capacity usage ratio of hydraulic system to greatest extent, promotes host cruising ability.
Description
Technical field
The present invention relates to technical field of hydraulic pressure more particularly to a kind of scissor aerial work platform hydraulic control systems.
Background technique
Aerial work platform is a kind of Multifunctional hoisting loading mechanization equipment, in addition to as the conveying of the cargo of different height,
It is widely used in the operations such as the installation, maintenance in high-altitude, such as municipal administration maintenance, harbour, logistics center's cargo transport, building decoration etc.,
Stage+module automobile chassis, storage battery chassis etc., can freely walk.Aerial work platform Related product mainly has: scissor-type
Aerial work platform, trailer-type aerial work platform, crank type aerial working platform, straight arm type aerial work platform, aluminium alloy
Aerial work platform, double-cylinder type aerial work platform, seven major class of spider-type aerial work platform.In addition scissor-type high altitude operation is flat
Platform is cheap compared to arm-type vehicle；It is more flexible compared to the aerial work platforms mobility such as hand propelled, spider-type, column type, therefore cut
V shape aerial work platform is increasingly approved that the high altitude operation that market portion has held a safe lead major type is flat by client
Platform.
But there is following problems: 1, scissor-type high-altitude for present scissor aerial work platform hydraulic control system
Job platform hydraulic control system selects four thread cartridge solenoid valves to be integrated in control valve block, controls aerial work platform
Lifting turns to, advances (retrogressings) and the walking of high low speed, distinguishes wherein using 3-position 4-way (or five logical) thread cartridge solenoid valve
Control turns to and advances (retrogressing), and because three multiport thread cartridge electromagnetic valve structures are relative complex, requirement on machining accuracy is high, examines
Consider security reliability host unit and be all made of import brand, virtually increases installation and after cost, be unfavorable for host
Home-produced Reconstruction.2, in order to guarantee to turn to the requirement of preferential and regime flow (3.5L/min), in the 3-position 4-way electricity that control turns to
Pressure compensated flow regulating valve (the starting general setting value of pressure is in 6-8bar) has been installed before magnet valve, causes not turn to linear rows
System pressure 6-8bar is additionally improved when walking operating condition；Although thread cartridge electromagnetic valve structure is compact convenient for integrated, pressure damage
Mistake value is often bigger than normal and non-constant, is especially especially apparent in three multi-pass types；Moreover aerial work platform is generally using storage
As a source of power, cruise duration is short and charging time length is the development bottleneck of aerial work platform, therefore to greatest extent for battery
The capacity usage ratio of raising hydraulic system also have certain realistic meaning.3, running gear not set back on motor oil return line
Pressure valve, i.e., not formed certain oil return resistance, has larger impact to mechanism kinematic stationarity.
Summary of the invention
In view of the above-mentioned problems, goal of the invention of the invention be to provide it is a kind of it is at low cost, the pressure loss is small and runs smoothly
Bypass off-load electromagnetic direct-drive scissor aerial work platform hydraulic control system.
In order to achieve the above object, the technical scheme of the present invention is realized as follows: constructing a kind of bypass off-load electromagnetic direct-drive
Scissor aerial work platform hydraulic control system includes lifting control module, course changing control module, travelling control module,
Lifting control module preferentially gives lifting mechanism fuel feeding by two position four-way solenoid valves, and course changing control module is steady prior to walking mechanism
Flow fuel feeding is simultaneously connected to brake to steering mechanism, travelling control module drive running motor, the difference is that: turn to control
Molding block includes electromagnetic direct-drive switching valve, and electromagnetic direct-drive switching valve is turning to main valve plug control terminal by steering main valve plug, setting
Left steering electromagnet and right turn electromagnet composition, turn to main valve plug be equipped with bypass unloading channel, neutral position off-load；Walking
Control module includes electromagnetic direct-drive walking valve, and electromagnetic direct-drive walking valve is by walking main valve plug, setting in walking main valve plug control
End it is forward walk electromagnet and rear walking electromagnet composition, walking main valve plug be equipped with bypass unloading channel, neutral position off-load.
Preferably, the main valve plug of the electromagnetic direct-drive switching valve is three six logical sliding valve structures.
Preferably, the main valve plug of the electromagnetic direct-drive walking valve is three six logical sliding valve structures.
Preferably, the bypass unloading channel for turning to main valve plug is in parallel with pressure compensated flow regulating valve oil inlet.
Preferably, being equipped with pressure-differentially-set valve between brake oil inlet passage and electromagnetic direct-drive walking valve oil inlet；Electromagnetism is straight
It drives walking valve work oil return line and is equipped with counterbalance valve.
Compared with prior art, the present invention beneficial effect has:
(1) electromagnetic direct-drive switching valve and electromagnetic direct-drive walking valve are substituted into three multi-pass type thread cartridge solenoid valves, i.e., it is sharp
Thread cartridge solenoid valve function is realized with switch electromagnet and the combination of multi-pass type main valve, so that solenoid valve internal structure is relatively simple
Change, reduce requirement on machining accuracy, reduce installation and after cost, is convenient for host Home-produced Reconstruction；
(2) parallel connection of pressure compensated flow regulating valve oil inlet bypasses oil duct, connects the middle position off-load of electromagnetic direct-drive switching valve
Channel, so that oil liquid eliminates the starting of pressure compensated flow regulating valve from the bypass straight mistake of oil duct when not turning to straight line walking operating condition
Pressure, system pressure reduce 6-8bar compared with original system；By switch electromagnet and multi-pass type main valve Combination Design, realize that screw thread is inserted
Solenoid valve function is filled, oil circuit pressure loss can be suitably reduced, improve the capacity usage ratio of hydraulic system to greatest extent, promote master
Machine cruising ability.
(3) pressure-differentially-set valve, electromagnetic direct-drive row are equipped between brake oil inlet passage and electromagnetic direct-drive walking valve oil inlet
It walks valve work oil return line and is equipped with counterbalance valve.For running motor in descending, outer load pressure, which reduces, even there is load, cause be
System pressure reduction, since the pressure superposition value of pressure-differentially-set valve and counterbalance valve is set in the half-clutch section of brake, so that brake
In half-clutch state, brake is equivalent to brake function at this time, so that complete machine descending steadily slows down, dilatory will not pause；Electricity
Magnetic directly drives walking valve work oil return line and is equipped with counterbalance valve, certain oil return resistance is formed, so that mechanism kinematic is steady, to guarantee
Reliable, the trouble free service of entire hydraulic system, make hydraulic oil maintain optimum working temperature.
Detailed description of the invention
Fig. 1 aerial work platform hydraulic system principle figure in the prior art；
The hydraulic system principle figure that Fig. 2 embodiment of the present invention is implemented；
Fig. 3 hydraulic control system schematic diagram of the embodiment of the present invention；
Description of symbols in figure:
1-oil pump, 2-filters, 3-fuel tanks, 4-hydraulic control systems, 5-running motors, 6-manual-operated emergent solutions
Locking device, 7-brakes, 8-steering cylinders, 9-control valves, 10-control valves, 11-elevating rams, 12-pressure gauges；
4.01-Y1 solenoid valves, 4.02-safety valves, 4.03-turn to safety valve, 4.04-check valves, 4.05-level pressure
Difference limen, 4.06-counterbalance valves, 4.07-Fill valves, 4.08-Y7 solenoid valves, 4.09-Y5 electromagnet, 4.10-walking main valves
Core, 4.11-Y6 electromagnet, 4.12-Y3 electromagnet, 4.13-turn to main valve plug, 4.14-Y4 electromagnet, 4.15-pressure and mend
Repay flow control valve, 4.16-lifting safety valves and P1 hydraulic fluid port, T1 hydraulic fluid port, T2 hydraulic fluid port, C1 hydraulic fluid port, C2 hydraulic fluid port, B1 hydraulic fluid port, B2
The composition such as hydraulic fluid port, BR hydraulic fluid port, BS hydraulic fluid port, AS hydraulic fluid port, CSE hydraulic fluid port.
Specific embodiment
For a better understanding of the present invention, technology of the invention is further illustrated with reference to the accompanying drawings and detailed description
Scheme, referring to figs. 2 and 3.
By the scissor aerial work platform hydraulic control system for the bypass off-load electromagnetic direct-drive that technical solution of the present invention is implemented
The inlet port of oil pump 1 is connected with hydraulic oil container 3 in system；The oil outlet of oil pump 1 is connected with the P1 of hydraulic control system 4 mouth；It is hydraulic
The CSE mouth of control system 4 is connected with the P3 mouth of the P2 of control valve 9 mouth and control valve 10；The AS mouth of hydraulic control system 4 and BS mouthfuls
It is connected with the left and right chamber of steering cylinder；The P4 mouth of the BR mouth manual-operated emergent tripper 6 of hydraulic control system 4 is connected；Hydraulic control
C1, C2, B1, B2 mouth of system 4 processed are connected respectively at the oil inlet and outlet of running motor；The T2 mouth of hydraulic control system 4 and filtering
Device 2 is connected, and eventually passes back to fuel tank 3.
Hydraulic control system 4 implements structure as shown in figure 3, P1 hydraulic fluid port is connected in Y1 solenoid valve 4.01, safety valve 4.02；Institute
Right oil outlet and lifting 4.16 oil inlet of safety valve and CSE hydraulic fluid port when stating left position of the Y1 solenoid valve 4.01 in figure are connected, Y1
Left oil outlet when left position of the solenoid valve 4.01 in figure leads to the oil inlet passage of course changing control module；Course changing control module into
The connection of oily channel turn to intermediate oil inlet mouth and pressure compensated flow regulating valve 4.15 of the main valve plug 4.13 in figure when middle position into
Hydraulic fluid port is connected；The E1 oil outlet and steering 4.03 oil inlet of safety valve and steering main valve plug of pressure compensated flow regulating valve 4.15
4.13 left oil inleting port in figure when middle position is connected；The E2 oil outlet of pressure compensated flow regulating valve 4.15 turns to safety valve
The oil inlet passage of 4.04 oil outlet connection walking module of 4.03 oil outlets and check valve；The oil inlet passage of walking module and level pressure are poor
The intermediate oil inlet mouth and BR hydraulic fluid port of 4.05 oil inlet of valve, walking main valve plug 4.10 in figure when middle position are connected；Pressure-differentially-set valve 4.05
The left oil inleting port of oil outlet and walking main valve plug 4.10 at middle position is connected；A left side of the walking main valve plug 4.10 in figure when left position goes out
Hydraulic fluid port is connected with the right oil inlet of C1 mouthfuls and Y7 solenoid valve 4.08 in figure when left position；Walking main valve plug 4.10 is in figure when left position
Right oil outlet with B2 mouthful and 4.08 oil outlet of Y7 solenoid valve connection；Walk upper middle oil outlet of the main valve plug 4.10 at middle position with
4.06 oil outlet of counterbalance valve is connected；The lower oil outlet of main valve plug 4.10 of walking is connected with the oil inlet of counterbalance valve 4.06；Check valve
The drainback passage of 4.07 oil inlets walking main valve plug 4.10 is connected, and oil outlet and C2 hydraulic fluid port are connected；Turn to 4.13 both ends of main valve plug
It is respectively equipped with Y3 electromagnet 4.12 and Y4 electromagnet 4.14, walking 4.10 both ends of main valve plug are respectively equipped with Y5 electromagnet 4.09 and Y6
Electromagnet 4.11.
The operation principle of the present invention is that:
1, when lifting.When complete machine lifting, 4.01 commutation work of Y1 solenoid valve, the right position in figure, oil pump output oil
Liquid reaches control valve 9 and control valve 10 through Y1 solenoid valve 4.01, to the rodless cavity fuel feeding of elevating ram, completes lifting movement.?
When lifting, oil-free to enter steering module and walking module, steering mechanism and walking mechanism can not work, while brake 7 is in
Locking state guarantees that complete machine is static in original place in lifting process.
, walking when.When complete machine walking, Y1 solenoid valve 4.01 does not work, the left position in figure, and oil pump exports oil liquid through Y1
Solenoid valve 4.01, steering module oil inlet passage reach 4.15 import of pressure compensated flow regulating valve and turn to main valve plug 4.13 and be in
Intermediate oil inlet mouth when middle position, when steering main valve plug 4.13 does not work, 4.15 need of work of pressure compensated flow regulating valve is higher
Cracking pressure, oil liquid directly pass through turn to main valve plug 4.13 in position off-load oil duct, it is poor that level pressure is directly reached through check valve 4.04
The intermediate oil inlet mouth and BR hydraulic fluid port of 4.05 oil inlet of valve, walking main valve plug 4.10 in figure when middle position, when Y6 electromagnet 4.11 is logical
Electricity, walking main valve plug 4.10 work position oil inlet passage in left position in figure, main valve plug 4.10 of walking are shut, and oil liquid enters walking
Motor operations, complete machine are walked forward；Similarly Y5 electromagnet 4.09 is powered, and the walking work of main valve plug 4.10 is whole in right position in figure
Machine is walked backward.When the work of Y7 solenoid valve 4.08 is in the right position in figure, two running motors are in parallel connection at this time, whole
The walking of machine low-speed big；When Y7 solenoid valve 4.08 does not work the left position in figure, two running motors are in series connection at this time
State, complete machine can realize that high speed is walked.Meanwhile to be set in brake half-clutch for the pressure of counterbalance valve 4.06 and pressure-differentially-set valve 4.05
Section, so that brake 7 is in half-clutch state, brake 7 is equivalent to brake function at this time, so that complete machine descending steadily subtracts
Speed dilatory will not pause.
, turn to and walk when.When complete machine turns to and walks, Y1 solenoid valve 4.01 is not operate at the left position in figure, oil pump
Oil liquid is exported to reach 4.15 import of pressure compensated flow regulating valve through Y1 solenoid valve 4.01, steering module oil inlet passage and turn to master
The oil inlet of spool 4.13.When the energization of Y4 electromagnet 4.14, the work of main valve plug 4.13 left position, middle position unloading channel in figure are turned to
It is shut, pump output oil liquid enters steering cylinder left chamber through AS mouthfuls, realizes right turn；Similarly Y3 electromagnet 4.12 is powered, and turns to
The work of main valve plug 4.13 right position in figure, realizes left steering.Meanwhile the extra oil liquid that oil pump 1 exports is through pressure compensated flow tune
The E2 oil outlet for saving valve 4.15 is walked forward to walking horse 5 up to oil liquid rotation, complete machine is provided.
Claims (5)
1. a kind of scissor aerial work platform hydraulic control system for bypassing off-load electromagnetic direct-drive includes lifting control mould
Block, course changing control module, travelling control module, lifting control module are preferentially supplied to lifting mechanism by two position four-way solenoid valves
Oil, course changing control module is prior to walking mechanism current stabilization amount fuel feeding to steering mechanism, and travelling control module drive running motor is simultaneously
It is connected to brake, it is characterised in that: course changing control module includes electromagnetic direct-drive switching valve, and electromagnetic direct-drive switching valve is led by turning to
The left steering electromagnet for turning to main valve plug control terminal and right turn electromagnet composition is arranged in spool, turns to main valve plug and is equipped with side
Road unloading channel, neutral position off-load；Travelling control module includes electromagnetic direct-drive walking valve, and electromagnetic direct-drive walks valve by walking
Main valve plug, be arranged in walking main valve plug control terminal it is forward walk electromagnet and rear walking electromagnet composition, walking main valve plug be equipped with
Bypass unloading channel, neutral position off-load.
2. the scissor aerial work platform hydraulic control system of bypass off-load electromagnetic direct-drive according to claim 1,
Be characterized in that: the main valve plug of the electromagnetic direct-drive switching valve is three six logical sliding valve structures.
3. the scissor aerial work platform hydraulic control system of bypass off-load electromagnetic direct-drive according to claim 1,
Be characterized in that: the main valve plug of the electromagnetic direct-drive walking valve is three six logical sliding valve structures.
4. the scissor aerial work platform hydraulic control system of bypass off-load electromagnetic direct-drive according to claim 1,
Be characterized in that: the bypass unloading channel for turning to main valve plug is in parallel with pressure compensated flow regulating valve oil inlet.
5. the scissor aerial work platform hydraulic control system of bypass off-load electromagnetic direct-drive according to claim 1,
It is characterized in that: being equipped with pressure-differentially-set valve between brake oil inlet passage and electromagnetic direct-drive walking valve oil inlet；Electromagnetic direct-drive walking
Valve works oil return line equipped with counterbalance valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710212583.8A CN106976825B (en) | 2017-04-01 | 2017-04-01 | Bypass the scissor aerial work platform hydraulic control system of off-load electromagnetic direct-drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710212583.8A CN106976825B (en) | 2017-04-01 | 2017-04-01 | Bypass the scissor aerial work platform hydraulic control system of off-load electromagnetic direct-drive |
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| Publication Number | Publication Date |
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| CN106976825A CN106976825A (en) | 2017-07-25 |
| CN106976825B true CN106976825B (en) | 2018-12-14 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107477041B (en) * | 2017-08-28 | 2020-11-27 | 美通重工有限公司 | Lifting oil cylinder valve block of scissor lifting platform |
| CN108661970A (en) * | 2018-07-25 | 2018-10-16 | 浙江高宇液压机电有限公司 | Scissor aerial work platform walking brake fluid pressure control valve group and system |
| CN110040439B (en) * | 2019-04-28 | 2021-03-02 | 淮北矿业股份有限公司 | Improved hydraulic system of scraper conveyor of roadheader |
| CN112357850B (en) * | 2020-09-01 | 2022-08-23 | 山东华龙农业装备股份有限公司 | Lifting mechanism of electric scissor maintenance operation device |
| CN112026917B (en) * | 2020-09-01 | 2022-03-11 | 山东华龙农业装备股份有限公司 | Self-propelled mechanism of electric scissor maintenance operation device and self-propelled mode control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11117908A (en) * | 1997-10-17 | 1999-04-27 | Zexel:Kk | Hydraulic circuit for vehicle for high lift work |
| CN203111304U (en) * | 2012-12-27 | 2013-08-07 | 镇江液压件厂有限责任公司 | Middle position unloading hydraulic steering gear |
| CN103693592B (en) * | 2013-08-06 | 2015-09-30 | 湖南星邦重工有限公司 | A kind of scissor-type aerial platform vibration hydraulic system |
| CN203667949U (en) * | 2014-01-26 | 2014-06-25 | 深圳市桑特液压技术有限公司 | Traveling and braking control system of scissor type overhead working truck |
| CN203946859U (en) * | 2014-05-28 | 2014-11-19 | 湖南星邦重工有限公司 | A kind of lifting of scissor-type altitude job platform and down maneuver hydraulic efficiency pressure system |
| CN106314137B (en) * | 2015-06-16 | 2019-07-23 | 徐工集团工程机械股份有限公司 | A kind of walking control for brake hydraulic system and scissor aerial work platform |
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Address after: 317000 358, zhe Road, Dayang street, Taizhou, Zhejiang. Applicant after: Zhejiang Gaoyu Hydraulic Mechanical and Electrical Co., Ltd. Address before: 317000 No. 358, extension Road, Dayang street, Taizhou, Zhejiang. Applicant before: Zhejiang Gaoyu Hydraulic Mechanical and Electrical Co., Ltd. |
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