CN208950997U - A kind of walking machine floating hydraulic system - Google Patents
A kind of walking machine floating hydraulic system Download PDFInfo
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- CN208950997U CN208950997U CN201821788185.7U CN201821788185U CN208950997U CN 208950997 U CN208950997 U CN 208950997U CN 201821788185 U CN201821788185 U CN 201821788185U CN 208950997 U CN208950997 U CN 208950997U
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Abstract
The utility model discloses a kind of walking machine floating hydraulic systems, including hydraulic pump, running motor, flushing valve, floating cylinder, floating control valve, shuttle valve, return of stroke valve, solenoid directional control valve and fuel tank；The fuel tank includes the first fuel tank and the second fuel tank；The floating control valve is equipped with the first hydraulic fluid port, the second hydraulic fluid port and third hydraulic fluid port；The floating control valve includes the first check valve and the first overflow valve；Two hydraulic fluid ports of first check valve are connected with the first hydraulic fluid port and the second hydraulic fluid port respectively；The flow direction of first check valve is to flow to the second hydraulic fluid port by the first hydraulic fluid port；Two hydraulic fluid ports on first overflow valve are connected with the first hydraulic fluid port and the second hydraulic fluid port respectively, and another hydraulic fluid port is connected with third hydraulic fluid port；The utility model is easy to operate, and stability is high, and machine travel and operation safety can be effectively ensured.
Description
Technical field
The utility model relates to aerial work platform technical fields, more particularly, to a kind of walking machine floating hydraulic pressure system
System.
Background technique
Aerial work platform is a kind of advanced aerial operation machine, can greatly improve the work effect of aerial construction personnel
Rate, safety and comfort, and labor intensity is reduced, it is early had been widely used in developed country.China's aerial work platform makes
With also the more opening the more extensive, enter initial general municipal road lamp maintenance, garden tree pruning etc., and it is fast with China's economy
Speed development, engineering construction, industrial installation, overhaul of the equipments, workshop maintenance, shipbuilding, electric power, municipal administration, airport, communication, gardens, traffic
Constantly increase Deng the demand to aerial work platform.
Wherein, arm-type high-altitude job platform because job area it is wide, cross-country ability is good, be suitable for various working, so using
Extensively.As shown in Figures 2 and 3, arm-type self-walking aerial working platform is to adapt to lead to tyre slip in the ground running of out-of-flatness,
It is driven using running motor, the mode of hydraulic control floating axle 103 solves 104 slipping phenomenon of tire.As shown in Fig. 2, working as arm
Formula aerial work platform is travelled at level land, and the floating cylinder 101 on the left side and the floating cylinder 101 on the right keep stroke not substantially
Become, keeps chassis 102 horizontal.As shown in figure 3, when arm-type high-altitude job platform traveling is at out-of-flatness ground, the tire 104 on the left side
Due to unbalance stress, the floating cylinder 101 of the floating cylinder 101 and the right that make the left side bounces back tire 104 with the right on one side, and one
Side is stretched out, to guarantee 102 basic horizontal of chassis.It is main for controlling two floating cylinders 101 in existing arm-type high-altitude job platform
There is active floating control mode, i.e. the adjusting of two floating cylinders 101 is to detect chassis inclination conditions by sensor, then pass through electricity
After the judgement of gas system logic, on-off instruction is issued to solenoid directional control valve, to provide high pressure oil to floating cylinder 101, driving is floated
Oil cylinder 101 is gone up and down, Lai Shixian floating control.This active floating control mode need to be detected by sensor and be controlled, and electromagnetic switch is made
Valve frequent movement, control is unstable, causes operation dangerous.
Utility model content
The purpose of this utility model, which is that, has overcome the deficiencies of the prior art and provide a kind of easy to operate, stability height,
The walking machine floating hydraulic system of machine travel and operation safety can be effectively ensured.
To achieve the goals above, the utility model provides a kind of walking machine floating hydraulic system, including hydraulic pump,
Running motor, flushing valve, floating cylinder, floating control valve, shuttle valve, return of stroke valve, solenoid directional control valve and fuel tank；The fuel tank
Including the first fuel tank and the second fuel tank；The floating control valve is equipped with the first hydraulic fluid port, the second hydraulic fluid port and third hydraulic fluid port；It is described floating
Dynamic control valve includes the first check valve and the first overflow valve；Two hydraulic fluid ports of first check valve respectively with the first hydraulic fluid port and second
Hydraulic fluid port is connected；The flow direction of first check valve is to flow to the second hydraulic fluid port by the first hydraulic fluid port；Two on first overflow valve
Hydraulic fluid port is connected with the first hydraulic fluid port and the second hydraulic fluid port respectively, and another hydraulic fluid port is connected with third hydraulic fluid port；
The hydraulic pump is connected with first fuel tank；The hydraulic pump respectively with the flushing valve and running motor phase
Connection；The flushing valve is connected with running motor；The flushing valve is connected with the first hydraulic fluid port of the two floating control valves；
Second hydraulic fluid port of the two floating control valves is connected with the rodless cavity of two floating cylinders respectively；The running motor is successively
It is connected by the shuttle valve, return of stroke valve, solenoid directional control valve with the third hydraulic fluid port of the two floating control valves；Two is described floating
The third hydraulic fluid port of dynamic control valve is connected；The flushing valve and running motor are connected with second fuel tank；The stroke
Reversal valve is connected with first fuel tank.
Further, the flushing valve includes reversal valve, second one-way valve, third check valve and the second overflow valve；It is described
Reversal valve is connected with the hydraulic pump and running motor respectively；It is in parallel between one oil inlet of the reversal valve and its oil outlet
There is second one-way valve, third check valve is parallel between another oil inlet and its oil outlet of the reversal valve, described second is single
It is the oil inlet that reversal valve is flowed to by the oil outlet of the reversal valve to the flow direction of valve and third check valve；The reversal valve passes through
Second overflow valve is connected with second fuel tank；The reversal valve is connected with the first hydraulic fluid port of the two floating control valves
It connects.
Further, the reversal valve is three two way selected valves.
Further, the return of stroke valve is open in usual.
Further, the solenoid directional control valve is open in usual.
Compared with prior art, the utility model has the beneficial effects that the utility model be integrated with fuel feeding, self-loopa oil return and
Multiple circuits of floating on-off control, realize free floating whens machine travel etc., and control mode is simple, and performance is stablized.When
When encountering insecurity factor during machine travel etc., floating cylinder locking, machine Tire support guarantees complete machine stability, protects
Demonstrate,prove machine travel and operation safety.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the hydraulic schematic diagram of the utility model.
Fig. 2 is structural schematic diagram of the arm-type high-altitude job platform traveling at level land.
Fig. 3 is structural schematic diagram of the arm-type high-altitude job platform traveling at out-of-flatness ground.
Specific embodiment
Utility model is further illustrated with reference to the accompanying drawing, but is not intended to limit the scope of the present invention.
As shown in Figure 1, a kind of walking machine floating hydraulic system that present embodiment provides, including hydraulic pump 1, walking horse
Up to 3, flushing valve 2, floating cylinder 7, floating control valve 8, shuttle valve 4, return of stroke valve 5, solenoid directional control valve 6 and fuel tank；The oil
Case includes the first fuel tank 9 and the second fuel tank 10；The floating control valve 8 is equipped with the first hydraulic fluid port D, the second hydraulic fluid port E and third oil
Mouth F；The floating control valve 8 includes the first check valve 80 and the first overflow valve 81；Two hydraulic fluid ports of first check valve 80 point
It is not connected with the first hydraulic fluid port D and the second hydraulic fluid port E；The flow direction of first check valve 80 is that the second oil is flowed to by the first hydraulic fluid port D
Mouth E；Two hydraulic fluid ports on first overflow valve 81 are connected with the first hydraulic fluid port D and the second hydraulic fluid port E respectively, another hydraulic fluid port and third
Hydraulic fluid port F is connected.
The hydraulic pump 1 is connected with first fuel tank 9, the hydraulic pump respectively with the flushing valve 2 and walking horse
It is connected up to 3；The flushing valve 2 is connected with running motor 3；First oil of the flushing valve 2 and the two floating control valves 8
Mouth D is connected；Second hydraulic fluid port E of the two floating control valves 8 is connected with the rodless cavity of two floating cylinders 7 respectively；Institute
State the third that running motor 3 passes sequentially through the shuttle valve 4, return of stroke valve 5, solenoid directional control valve 6 and the two floating control valves 8
Hydraulic fluid port F is connected；The third hydraulic fluid port F of the two floating control valves 8 is connected；The flushing valve 2 and running motor 3 with it is described
Second fuel tank 10 is connected；The return of stroke valve 5 is connected with first fuel tank 9.
The oil inlet A of hydraulic pump 1 is connected with the first fuel tank 9 in present embodiment, the oil outlet B of hydraulic pump 1 respectively with
The oil inlet A1 of flushing valve 2, the hydraulic fluid port A2 of running motor 3 are connected；The oil outlet B of hydraulic pump 1 oil inlet with flushing valve 2 respectively
Mouthful B1, running motor 3 hydraulic fluid port B2 be connected；The oil inlet A1 of flushing valve 2 is connected with the hydraulic fluid port A2 of running motor 3；It rinses
The oil inlet B1 of valve 2 is connected with the hydraulic fluid port B2 of running motor 3；The first of the oil outlet C of flushing valve 2 and two floating control valves 8
Hydraulic fluid port D is connected；Second hydraulic fluid port E of two floating control valves 8 is connected with the rodless cavity of two floating cylinders 7 respectively；Running motor 3
Hydraulic fluid port A2 and hydraulic fluid port B2 be connected respectively with two oil inlets of shuttle valve 4, the oil inlet of the oil outlet of shuttle valve 4 and return of stroke valve 5
Mouthful be connected, the oil outlet of return of stroke valve 5 is connected with the oil inlet of solenoid directional control valve 6, the oil outlet of solenoid directional control valve 6 and
The third hydraulic fluid port F of two floating control valves 8 is connected；The oil return opening of return of stroke valve 5 is connected with the first fuel tank 9；Flushing valve 2
The oil return opening of oil return opening and running motor 3 is connected with the first fuel tank 10.
Return of stroke valve described in present embodiment 5 is open in usual.The solenoid directional control valve 6 is open in usual.
The working principle of oil supply loop is as follows in present embodiment: when hydraulic pump 1 passes through oil inlet A to running motor 3
When hydraulic fluid port A2 pressure oil output is to drive running motor 3 to walk, the pipeline of oil inlet A connection at this time is high-pressure oil passage, is rushed at this time
It washes valve 2 and moves down commutation, the oil inlet B1 of flushing valve 2 is connected to its oil outlet C, and oil inlet A1 is not connected to oil outlet C, at this time
Hydraulic oil on high-pressure oil passage cannot reach the first hydraulic fluid port D of floating control valve 8 through flushing valve 2, and 3 hydraulic fluid port B1 of running motor
Hydraulic oil reaches the first hydraulic fluid port D of floating control valve 8 by flushing valve 2, and enters the nothing of floating cylinder 7 through the first check valve 80
Rod cavity realizes the fuel feeding to two floating cylinders 7, wherein the first overflow valve 81 is in close state.
When hydraulic pump 1 drives running motor 3 to walk by oil inlet B to the hydraulic fluid port B2 pressure oil output of running motor 3
When, the pipeline of oil inlet B connection at this time is high-pressure oil passage, and flushing valve at this time 2 moves up commutation, the oil inlet A1 of flushing valve 2 and its
Oil outlet C connection, and oil inlet B1 is not connected to oil outlet C, the hydraulic oil on high-pressure oil passage cannot be reached through flushing valve 2 at this time
First hydraulic fluid port D of floating control valve 8, and the hydraulic oil of 3 hydraulic fluid port A1 of running motor reaches floating control valve 8 by flushing valve 2
First hydraulic fluid port D, and the fuel feeding to two floating cylinders 7 is realized into the rodless cavity of floating cylinder 7 through the first check valve 80, wherein
First overflow valve 81 is in close state.
The working principle of self-loopa oil return circuit is as follows in present embodiment: according to the working principle of oil supply loop it is found that
The hydraulic oil exported from 2 oil outlet C of flushing valve reaches the first hydraulic fluid port D of two floating control valves 8, and enters through the first check valve 80
The rodless cavity of floating cylinder 7 realizes that the fuel feeding to two floating cylinders 7, final hydraulic oil can be full of the rodless cavity of floating cylinder 7,
And under the action of the first check valve 80, the hydraulic oil of 7 rodless cavity of floating cylinder cannot be flowed out from floating cylinder 7, thus hydraulic
Oil is sealed in floating cylinder 7.And since hydraulic oil is incompressible, the cylinder barrel and piston rod of floating cylinder 7 are one
Rigid body, to guarantee the rigidity of machine vehicle bridge, so that whole vehicle stability is high.Wherein running motor hydraulic fluid port A2 and hydraulic fluid port B2 respectively with
4 liang of oil inlets of shuttle valve are connected, and shuttle valve 4 selects the hydraulic oil that pressure is high in running motor hydraulic fluid port A2 and hydraulic fluid port B2 to reach stroke
The oil inlet of reversal valve 5, hydraulic oil reach the third hydraulic fluid port of two floating control valves 8 after return of stroke valve 4 and solenoid directional control valve 5
F opens two first overflow valves 81, the hydraulic oil in two floating cylinders, 7 rodless cavity is through the at this time under the pressure effect of hydraulic oil
The outflow of one overflow valve 81.If a floating cylinder 7 is squeezed by external applied load in two floating cylinders 7, this 7 pressure of floating cylinder increases
Greatly, liquid oil liquid is flowed out from this floating cylinder 7, in the rodless cavity for reaching the lower another floating cylinder 7 of pressure, so realizes that two is floating
The self-loopa of dynamic 7 oil circuit of oil cylinder.If in two floating cylinders 7 the corresponding tire of a floating cylinder 7 with entering hollow when, this is floating
The opposite force that dynamic oil cylinder 7 loses gravity squeezes, and makes the piston rod of this floating cylinder 7 because self weight is stretched out, and this 7 internal pressure of floating cylinder
Power reduces, so that the hydraulic oil in the higher another floating cylinder 7 of pressure exits into the rodless cavity of this floating cylinder 7.
Therefore two first overflow valves 81 are opened so that the rodless cavity of two floating cylinders 7 is connected, the hydraulic oil in two floating cylinders 7 with
It is lower that the size of two floating cylinders, 7 pressure and hydraulic oil from the rodless cavity of the higher floating cylinder 7 of pressure flow to pressure
Another floating cylinder 7 rodless cavity, realize two floating cylinders, 7 oil circuit self-loopa, i.e. two floating cylinders 7 float.
The working principle of floating on-off control loop is as follows in present embodiment: former according to the work of self-loopa oil return circuit
After reason is it is found that two first overflow valves 81 in two floating control valves 8 open, two floating cylinders, 7 oil circuit self-loopa, so that two float
7 free floating of oil cylinder.During machine travel or operation etc., such as when machine get on the bus turntable go to certain angle when, on turntable
When one cam mechanism opens return of stroke valve 5, return of stroke valve 5 is set to commutate, so that hydraulic oil cannot reach solenoid directional control valve
6, the first overflow valve 81 in floating control valve 8 is closed, and floating cylinder 7 is latched, machine Tire support, guarantees complete machine stability,
Guarantee operation safety.When encountering insecurity factor during machine travel etc., return of stroke valve 5 is failure to actuate, solenoid directional control valve 6
Must be electric, so that the hydraulic oil to come through return of stroke valve 5 cannot reach the third hydraulic fluid port of floating control valve 9 through solenoid directional control valve 6
F, the first overflow valve 81 are closed, and floating cylinder 7 is latched, machine Tire support, the complete machine stability of guarantee, guarantee operation safety.
Present embodiment is integrated with multiple circuits of fuel feeding, self-loopa oil return and the control of floating on-off, causes a machine to be expert at
Free floating when sailing realizes that machine is multi-functional, and control mode is simple, and performance is stablized, and machine travel and operation peace is effectively ensured
Entirely.
Flushing valve 3 described in present embodiment includes that reversal valve 20, second one-way valve 21, third check valve 22 and second are excessive
Flow valve 23；Oil inlet A1, the oil inlet B1 and oil outlet C, that is, reversal valve 20 oil inlet A1, oil inlet B1 of flushing valve 2 and fuel-displaced
Mouth C；Be parallel with second one-way valve 21 between the oil inlet A1 and oil outlet C of the reversal valve 20, oil inlet B1 and oil outlet C it
Between be parallel with third check valve 22, wherein the flow direction of second one-way valve 21 is by the oil outlet C of reversal valve 20 to flow to reversal valve 20
Oil inlet A1；The flow direction of third check valve 22 is the oil inlet A2 that reversal valve 20 is flowed to by the oil outlet C of reversal valve 20；It is described
The oil outlet C of reversal valve 2 is connected by second overflow valve 23 with second fuel tank 10；The reversal valve 20 it is fuel-displaced
Mouth C is connected with the first hydraulic fluid port D of the two floating control valves 8.Reversal valve 20 is three two way selected valves in present embodiment.
When oil circuit pressure is excessive, the second overflow valve 23 plays the role of overflow oil return, guarantees that the pressure of oil circuit is stablized.
Specifically, the working principle of oil supply loop is as follows: when hydraulic pump 1 passes through oil inlet A to the hydraulic fluid port A2 of running motor 3
When pressure oil output is to drive running motor 3 to walk, the pipeline of oil inlet A connection at this time is high-pressure oil passage, at this time reversal valve 20
Commutation is moved down, the oil inlet B1 of reversal valve 20 is connected to its oil outlet C, and under the action of second one-way valve 21, oil inlet A1
It is not connected to oil outlet C, the hydraulic oil on high-pressure oil passage cannot reach the first hydraulic fluid port of floating control valve 8 through flushing valve 2 at this time
D, and the hydraulic oil of 3 hydraulic fluid port B1 of running motor reaches the first hydraulic fluid port D of floating control valve 8 by flushing valve 2, and unidirectional through first
Valve 80 enters the rodless cavity of floating cylinder 7, realizes the fuel feeding to two floating cylinders 7, wherein the first overflow valve 81, which is in, closes shape
State.
When hydraulic pump 1 drives running motor 3 to walk by oil inlet B to the hydraulic fluid port B2 pressure oil output of running motor 3
When, the pipeline of oil inlet B connection at this time is high-pressure oil passage, and reversal valve 20 moves up commutation at this time, the oil inlet A1 of reversal valve 20 and
Its oil outlet C connection, and under the action of third check valve 22, and oil inlet B1 is not connected to oil outlet C, at this time on high-pressure oil passage
Hydraulic oil the first hydraulic fluid port D of floating control valve 8 cannot be reached through flushing valve 2, and the hydraulic oil of 3 hydraulic fluid port A1 of running motor passes through
Flushing valve 2 reaches the first hydraulic fluid port D of floating control valve 8, and enters the rodless cavity of floating cylinder 7 through the first check valve 80, realizes
To the fuel feeding of two floating cylinders 7, wherein the first overflow valve 81 is in close state.
Basic principles, main features, and advantages of the present invention has been shown and described above.Current row
The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments
Only illustrate the principles of the present invention, the utility model can also on the premise of not departing from the spirit and scope of the utility model
There are various changes and modifications, these various changes and improvements fall within the scope of the claimed invention.The utility model is wanted
Protection scope is asked to be defined by appended claims and its equivalent.
Claims (5)
1. a kind of walking machine floating hydraulic system, which is characterized in that including hydraulic pump, running motor, flushing valve, float oil
Cylinder, floating control valve, shuttle valve, return of stroke valve, solenoid directional control valve and fuel tank；The fuel tank includes the first fuel tank and the second oil
Case；The floating control valve is equipped with the first hydraulic fluid port, the second hydraulic fluid port and third hydraulic fluid port；The floating control valve includes first unidirectional
Valve and the first overflow valve；Two hydraulic fluid ports of first check valve are connected with the first hydraulic fluid port and the second hydraulic fluid port respectively；Described first
The flow direction of check valve is to flow to the second hydraulic fluid port by the first hydraulic fluid port；Two hydraulic fluid ports on first overflow valve respectively with the first hydraulic fluid port and
Second hydraulic fluid port is connected, and another hydraulic fluid port is connected with third hydraulic fluid port；
The hydraulic pump is connected with first fuel tank；The hydraulic pump is connected with the flushing valve and running motor respectively
It connects；The flushing valve is connected with running motor；The flushing valve is connected with the first hydraulic fluid port of the two floating control valves；Two
Second hydraulic fluid port of the floating control valve is connected with the rodless cavity of two floating cylinders respectively；The running motor successively leads to
The shuttle valve, return of stroke valve, solenoid directional control valve is crossed to be connected with the third hydraulic fluid port of the two floating control valves；Two floatings
The third hydraulic fluid port of control valve is connected；The flushing valve and running motor are connected with second fuel tank；The stroke changes
It is connected to valve with first fuel tank.
2. a kind of walking machine floating hydraulic system according to claim 1, which is characterized in that the flushing valve includes changing
To valve, second one-way valve, third check valve and the second overflow valve；The reversal valve respectively with the hydraulic pump and running motor phase
Connection；Second one-way valve, another oil inlet of the reversal valve are parallel between the oil inlet and its oil outlet of the reversal valve
Mouthful third check valve is parallel between its oil outlet, the flow direction of the second one-way valve and third check valve is by the commutation
The oil outlet of valve flows to the oil inlet of reversal valve；The reversal valve is connected by second overflow valve with second fuel tank
It connects；The reversal valve is connected with the first hydraulic fluid port of the two floating control valves.
3. a kind of walking machine floating hydraulic system according to claim 2, which is characterized in that the reversal valve is three
Two way selected valve.
4. a kind of walking machine floating hydraulic system according to claim 1-3, which is characterized in that the stroke
Reversal valve is open in usual.
5. a kind of walking machine floating hydraulic system according to claim 1-3, which is characterized in that the electromagnetism
Reversal valve is open in usual.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821788185.7U CN208950997U (en) | 2018-11-01 | 2018-11-01 | A kind of walking machine floating hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821788185.7U CN208950997U (en) | 2018-11-01 | 2018-11-01 | A kind of walking machine floating hydraulic system |
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| Publication Number | Publication Date |
|---|---|
| CN208950997U true CN208950997U (en) | 2019-06-07 |
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ID=66743727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821788185.7U Active CN208950997U (en) | 2018-11-01 | 2018-11-01 | A kind of walking machine floating hydraulic system |
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| CN (1) | CN208950997U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109185245A (en) * | 2018-11-01 | 2019-01-11 | 湖南杰希重工有限公司 | A kind of walking machine floating hydraulic system |
-
2018
- 2018-11-01 CN CN201821788185.7U patent/CN208950997U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109185245A (en) * | 2018-11-01 | 2019-01-11 | 湖南杰希重工有限公司 | A kind of walking machine floating hydraulic system |
| CN109185245B (en) * | 2018-11-01 | 2024-03-29 | 湖南杰希重工有限公司 | Floating hydraulic system of walking machinery |
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