CN203513142U - Automobile crane and support leg control system thereof - Google Patents
Automobile crane and support leg control system thereof Download PDFInfo
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- CN203513142U CN203513142U CN201320652572.9U CN201320652572U CN203513142U CN 203513142 U CN203513142 U CN 203513142U CN 201320652572 U CN201320652572 U CN 201320652572U CN 203513142 U CN203513142 U CN 203513142U
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- 230000002457 bidirectional effect Effects 0.000 claims description 9
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Abstract
The utility model provides an automobile crane and a support leg control system thereof. The support leg control system comprises a reversing valve, a front support leg reversing valve, a front support leg vertical oil cylinder and a control valve, wherein a first working oil hole of the reversing valve is connected with a rod cavity of the front support leg vertical oil cylinder, and a second working oil hole of the reversing valve is connected with an oil inlet/outlet of the front support leg reversing valve; a first working oil hole of the front support leg reversing valve is connected with a rodless cavity of the front support leg vertical oil cylinder; the rodless cavity of the front support leg vertical oil cylinder is connected with the second working oil hole of the reversing valve by the control valve; the control valve is connected with the front support leg reversing valve in parallel; when the reversing valve is arranged at a first operating position, the control valve is disconnected; when the reversing valve is arranged at a second operating position, the rod cavity of the front support leg vertical oil cylinder is connected with a first oil inlet of the reversing valve, the control valve is connected under the action of hydraulic oil, and the rodless cavity of the front support leg vertical oil cylinder is connected with an oil return hole of the reversing valve. After the automobile crane and the support leg control system thereof are adopted, the potential safety hazard caused by the factor that an operator forgets to take back a support leg can be prevented.
Description
Technical field
The utility model relates to construction machinery and equipment, in particular to a kind of car hosit and supporting leg control system thereof.
Background technology
Current most car hosit has all been equipped with four side leg and front leg struts that are positioned at the place ahead that are positioned at side, hang while carrying operation getting on the bus, the cross cylinder of four side legs and Vertical Cylinders all need to stretch out makes car load in the state of supported, carrying out hanging of front region while carrying operation, for security consideration, also need front leg strut Vertical Cylinders to stretch out, so, design a rational supporting leg control system, operator can be operated simply and easily and just seem very important.Meanwhile, in order to save cost, in the car hosit of medium and small tonnage, most of supporting leg control system all adopts manual joystick to carry out the control operation of supporting leg.
As depicted in figs. 1 and 2, for the schematic diagram of existing a kind of supporting leg control system, mainly comprise by pass valve 10 ', change-over valve 20 ', safety valve 30 ', front leg strut change-over valve 41 ', front leg strut bidirectional hydraulic lock 42 ', front leg strut Vertical Cylinders 43 ', side leg change-over valve 51 ', side leg bidirectional hydraulic lock 52 ', side leg Vertical Cylinders 53 ' and side leg cross cylinder 54 '.
By pass valve 10 ' plays safety guard-safeguard effect, has determined the top pressure of each hydraulic fluid port output of supporting leg control system.
Safety valve 30 ' plays overload protective function, and the maximum pressure while stretching out for constrained side supporting leg cross cylinder 54 ' prevents the flexural deformation that side leg cross cylinder 54 ' overload causes.
When the joystick of change-over valve 20 ' is down pulled, make change-over valve 20 ' when the first working position, can carry out the operation of stretching out of front leg strut Vertical Cylinders 43 ', side leg Vertical Cylinders 53 ' and side leg cross cylinder 54 ', when the joystick of change-over valve 20 ' is up pulled, make change-over valve 20 ' when the second working position, can carry out the retraction operation of front leg strut Vertical Cylinders 43 ', side leg Vertical Cylinders 53 ' and side leg cross cylinder 54 '.
When the joystick of side leg change-over valve 51 ' is down pulled, make side leg change-over valve 51 ' when the first working position, coordinate again the joystick of change-over valve 20 ' down to pull, just can carry out the operation of stretching out of side leg Vertical Cylinders 53 ', in like manner, when the joystick of side leg change-over valve 51 ', down pull, make side leg change-over valve 51 ' when the first working position, coordinate again the joystick of change-over valve 20 ' up to pull, just can carry out the retraction operation of side leg Vertical Cylinders 53 '.
When the joystick of side leg change-over valve 51 ' is up pulled, make side leg change-over valve 51 ' when the second working position, coordinate again the joystick of change-over valve 20 ' down to pull, just can carry out the operation of stretching out of side leg cross cylinder 54 ', in like manner, when the joystick of side leg change-over valve 51 ', up pull, make side leg change-over valve 51 ' when the second working position, coordinate again the joystick of change-over valve 20 ' up to pull, just can carry out the retraction operation of side leg cross cylinder 54 '.
When the joystick of front leg strut change-over valve 41 ' is down pulled, make front leg strut change-over valve 41 ' when front leg strut change-over valve the first working position, coordinate again the joystick of change-over valve 20 ' down to pull, just can carry out the operation of stretching out of front leg strut Vertical Cylinders 43 ', in like manner, when the joystick of front leg strut change-over valve 41 ' is down pulled, make front leg strut change-over valve 41 ' when front leg strut change-over valve the first working position, coordinate again the joystick of change-over valve 20 ' up to pull, just can carry out the retraction operation of front leg strut Vertical Cylinders 43 '.Because front leg strut does not have front leg strut cross cylinder, so the joystick of front leg strut change-over valve 41 ' is up pulled without any action.
Front leg strut Vertical Cylinders 43 ' is connected with front leg strut bidirectional hydraulic lock 42 ', for front leg strut Vertical Cylinders 43 ' is carried out to pressurize, each side leg Vertical Cylinders 53 ' is connected with respectively a side leg bidirectional hydraulic lock 52 ', for side leg Vertical Cylinders 53 ' is carried out to pressurize.Here the effect of bidirectional hydraulic lock is to prevent that corresponding Vertical Cylinders from retracting while carrying operation or in motion because deadweight is stretched out hanging, when the corresponding change-over valve of inoperation, can guarantee that pressure in corresponding Vertical Cylinders and fluid remain on a position different, can not change, even if change-over valve breaks with the connecting line between corresponding Vertical Cylinders, also can maintain Vertical Cylinders motionless in situ, guarantee that the normal safety jaw of car hosit carries operation and travels.
As can be seen from the above description, except the Vertical Cylinders of same side leg and cross cylinder can not move simultaneously, the Vertical Cylinders of the cross cylinder of four side legs and Vertical Cylinders and front leg strut all can independent operation, also combination operation together.
But, in practical operation, it is less that the operating mode of carrying is hung in the place ahead, use the probability of front leg strut lower, operator can form the custom of withdrawal for the side leg of long-term use, but for the front leg strut of less use, usually easily forgets withdrawal, front leg strut forgets that withdrawal can cause the distortion of vehicle frame front support beam, even causes weld cracking.
Utility model content
The utility model aims to provide a kind of car hosit and supporting leg control system thereof, can prevent that operator from forgetting that regaining supporting leg causes potential safety hazard.
To achieve these goals, according to an aspect of the present utility model, provide a kind of supporting leg control system, comprised change-over valve, front leg strut change-over valve and front leg strut Vertical Cylinders; The first actuator port of change-over valve is connected with the rod chamber of front leg strut Vertical Cylinders, and the second actuator port of change-over valve is connected with the oil inlet and outlet of front leg strut change-over valve, and the first actuator port of front leg strut change-over valve is connected with the rodless cavity of front leg strut Vertical Cylinders; Supporting leg control system also comprises control cock, and the rodless cavity of front leg strut Vertical Cylinders is connected with the second actuator port of change-over valve by control cock, and control cock and front leg strut change-over valve connect; When change-over valve is positioned at the first working position, control cock disconnects; When change-over valve is positioned at the second working position, the rod chamber of front leg strut Vertical Cylinders is connected with the first oil inlet of change-over valve, and control cock is communicated with under hydraulic oil effect, and the rodless cavity of front leg strut Vertical Cylinders and the return opening of change-over valve are connected.
Further, control cock is hydraulicchange-over valve, and the control port of hydraulicchange-over valve is connected with the first actuator port of change-over valve.
Further, control cock is check valve.
Further, control cock is hydraulic control one-way valve, and the control port of hydraulic control one-way valve is connected with the first actuator port of change-over valve.
Further, control cock is by pass valve.
Further, when change-over valve is positioned at the first working position, the first oil inlet of change-over valve is connected with the second actuator port of change-over valve, and the return opening of change-over valve is connected with the first actuator port of change-over valve; When change-over valve is positioned at the second working position, the first oil inlet of change-over valve is connected with the first actuator port of change-over valve, and the return opening of change-over valve is connected with the second actuator port of change-over valve.
Further, when front leg strut change-over valve is positioned at the first working position, front leg strut change-over valve disconnects; When front leg strut change-over valve is positioned at the second working position, the oil inlet and outlet of front leg strut change-over valve is connected with the first actuator port of front leg strut change-over valve.
Further, supporting leg control system also comprises the second hydraulic control one-way valve, the first actuator port of change-over valve is connected with the rod chamber of front leg strut Vertical Cylinders by the second hydraulic control one-way valve, and the control port of the second hydraulic control one-way valve is connected with the second actuator port of change-over valve.
Further, supporting leg control system also comprises for front leg strut Vertical Cylinders being carried out to the bidirectional hydraulic lock of pressurize.
According on the other hand of the present utility model, a kind of car hosit is provided, comprising: four side legs, lay respectively at the relative both sides of car hosit; Front leg strut, is positioned at the front side of car hosit; And supporting leg control system, for controlling the flexible of four side legs and front leg strut; Supporting leg control system is aforesaid supporting leg control system, and front leg strut Vertical Cylinders is corresponding to front leg strut setting.
Application the technical solution of the utility model, in supporting leg control system, increase control cock, the rodless cavity of front leg strut Vertical Cylinders is connected with the change-over valve of controlling whole system oil-feed, oil return by control cock, and control cock and front leg strut change-over valve also connect, when reversing valve operated when stretching out front leg strut, control cock disconnects, and stretching out of front leg strut Vertical Cylinders do not exerted an influence; When reversing valve operated when regaining front leg strut, can make control cock automatic switching under the effect of hydraulic oil simultaneously, and then the rodless cavity of front leg strut Vertical Cylinders can be connected with the return opening of change-over valve, even if inoperation front leg strut change-over valve also can complete the withdrawal of front leg strut Vertical Cylinders, avoid operator to forget that operation front leg strut change-over valve causes front leg strut not regained, and then avoid causing potential safety hazard.
Accompanying drawing explanation
The Figure of description that forms the application's a part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 shows according to the schematic diagram of the supporting leg control system of prior art;
Fig. 2 shows according to the schematic diagram of the bottom maneuvering valve of Fig. 1;
Fig. 3 shows according to the schematic diagram of the first supporting leg control system of embodiment of the present utility model;
Fig. 4 shows according to the schematic diagram of the bottom maneuvering valve of Fig. 3;
The hydraulic oil that Fig. 5 shows while retracting according to the front leg strut Vertical Cylinders of the supporting leg control system of embodiment of the present utility model moves towards schematic diagram;
Fig. 6 shows according to the schematic diagram of the second supporting leg control system of embodiment of the present utility model;
Fig. 7 shows according to the schematic diagram of the third supporting leg control system of embodiment of the present utility model;
Fig. 8 shows according to the schematic diagram of the 4th of embodiment of the present utility model the kind of supporting leg control system; And
Fig. 9 shows according to the schematic diagram of the 5th of embodiment of the present utility model the kind of supporting leg control system.
The specific embodiment
Describe below with reference to the accompanying drawings and in conjunction with the embodiments the utility model in detail.It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the application can combine mutually.
As shown in Figures 3 to 5, according to embodiment of the present utility model, provide a kind of supporting leg control system, preferably, this supporting leg control system is on car hosit, for controlling the landing leg stretching of car hosit.The supporting leg of car hosit comprises four side legs and a front leg strut, wherein four side legs lay respectively at two opposite sides of car hosit, each side has two side legs, a front leg strut is positioned at the place ahead of car hosit, hang while carrying operation getting on the bus, four side legs stretch out and make car load in the state of supported, carrying out hanging of front region while carrying operation, front leg strut is stretched out, in order to control respectively the expanding-contracting action of front leg strut and four side legs, supporting leg control system comprises change-over valve 20, front leg strut change-over valve 41, front leg strut Vertical Cylinders 43, control cock 60, side leg change-over valve 51, side leg Vertical Cylinders 53 and side leg cross cylinder 54, wherein front leg strut change-over valve 41 and front leg strut Vertical Cylinders 43 are corresponding to front leg strut, side leg change-over valve 51, side leg Vertical Cylinders 53 and side leg cross cylinder 54 are corresponding to side leg.
Side leg change-over valve 51, side leg Vertical Cylinders 53 and side leg cross cylinder 54 have respectively four, corresponding to four side legs.
Change-over valve 20, front leg strut change-over valve 41 and side leg change-over valve 51 have formed the maneuvering valve of car hosit, and the P mouth of maneuvering valve connects oil pump outlet, and the T mouth oil return of maneuvering valve is to hydraulic reservoir.
The first actuator port 24 of change-over valve 20 respectively with the rod chamber of front leg strut Vertical Cylinders 43, the rod chamber of the rod chamber of side leg Vertical Cylinders 53 and side leg cross cylinder 54 connects, the second actuator port 25 of change-over valve 20 respectively with the oil outlet 62 of control cock 60, the oil inlet and outlet 44 of front leg strut change-over valve 41 and the oil inlet and outlet of side leg change-over valve 51 55 connect, the oil inlet 61 of control cock 60 is connected with the rodless cavity of front leg strut Vertical Cylinders 43, the first actuator port 46 of front leg strut change-over valve 41 is connected with the rodless cavity of front leg strut Vertical Cylinders 43, the first actuator port 57 of side leg change-over valve 51 is connected with the rodless cavity of side leg Vertical Cylinders 53, the second actuator port 58 of side leg change-over valve 51 is connected with the rodless cavity of side leg cross cylinder 54.
In the present embodiment, because the rodless cavity of front leg strut Vertical Cylinders 43 is connected with the second actuator port 25 of change-over valve 20 by control cock 60, control cock 60 can be under hydraulic oil effect automatic switching on, and control cock 60 and front leg strut change-over valve 41 also connect, when change-over valve 20 is positioned at the first working position (being upper shown in Fig. 3), owing to there is no hydraulic fluid pressure, control cock 60 disconnects, when change-over valve 20 is positioned at the second working position (Figure 3 shows that the next), under hydraulic oil effect, control cock 60 is communicated with, the rod chamber of front leg strut Vertical Cylinders 43 is connected with the first oil inlet 21 of change-over valve 20, control cock 60 is communicated with under hydraulic oil effect, the rodless cavity of front leg strut Vertical Cylinders 43 and the return opening 23 of change-over valve 20 are connected, front leg strut Vertical Cylinders 43 can be retracted smoothly, like this, even if operating personal is forgotten operation front leg strut change-over valve 41, also can not delay the retraction of front leg strut Vertical Cylinders 43, avoided the generation of safety misadventure.
Preferably, in conjunction with referring to shown in 3 to Fig. 5, control cock 60 is hydraulicchange-over valve, the oil inlet of hydraulicchange-over valve is connected with the rodless cavity of front leg strut Vertical Cylinders 43, and the oil outlet of hydraulicchange-over valve is connected with the second actuator port 25 of change-over valve 20, and the control port of hydraulicchange-over valve is connected with the first actuator port 24 of change-over valve 20, when the first actuator port 24 of change-over valve 20 is connected with the P mouth of maneuvering valve, under the effect of hydraulic oil, hydraulicchange-over valve can automatic switching on, without M/C.
Further preferably, hydraulicchange-over valve and operating valve are integral type structure.
Further preferably, in conjunction with shown in Figure 6, hydraulicchange-over valve and maneuvering valve can be also split-type structurals.
Preferably, in conjunction with shown in Figure 7, control cock 60 is check valve, and the oil inlet of check valve is connected with the rodless cavity of front leg strut Vertical Cylinders 43, and the oil outlet of check valve is connected with the second actuator port 25 of change-over valve 20.
Preferably, in conjunction with shown in Figure 8, control cock 60 can be also hydraulic control one-way valve, the oil inlet of this hydraulic control one-way valve is connected with the rodless cavity of front leg strut Vertical Cylinders 43, the oil outlet of this hydraulic control one-way valve is connected with the second actuator port 25 of change-over valve 20, changes the control port of hydraulic control one-way valve and the first actuator port 24 of change-over valve 20 is connected.
Preferably, in conjunction with shown in Figure 9, control cock 60 can be also by pass valve, and the oil inlet of this by pass valve is connected with the rodless cavity of front leg strut Vertical Cylinders 43, and the oil outlet of this by pass valve is connected with the second actuator port 25 of change-over valve 20.
In addition, as long as can realize when change-over valve 20 is positioned at the first working position, do not open, other valve bodies of automatically opening when change-over valve 20 is positioned at the second working position also can be used as control cock 60 and use.
Change-over valve 20 is for controlling oil-feed and the oil return of whole supporting leg control system, preferably, change-over valve 20 is three six-way valves, when change-over valve 20 is positioned at the first working position (Figure 3 shows that upper), the return opening 23 of change-over valve 20 is connected with the first actuator port 24 of change-over valve 20, the first oil inlet 21 of change-over valve 20 is connected with the second actuator port 25 of change-over valve 20, the second oil inlet 22 of change-over valve 20 and the 3rd actuator port 26 of change-over valve 20 disconnect, now can carry out front leg strut Vertical Cylinders 43, side leg Vertical Cylinders 53 and side leg cross cylinder 54 stretch out operation.
When change-over valve 20 is positioned at the second working position (Figure 3 shows that the next), the return opening 23 of change-over valve 20 is connected with the second actuator port 25 of change-over valve 20, the first oil inlet 21 of change-over valve 20 is connected with the first actuator port 24 of change-over valve 20, the second oil inlet 22 and the 3rd actuator port 26 of change-over valve 20 of change-over valve 20 disconnect, and now can carry out the retraction operation of front leg strut Vertical Cylinders 43, side leg Vertical Cylinders 53 and side leg cross cylinder 54.
When change-over valve 20 is positioned at the 3rd working position (Figure 3 shows that meta), the return opening 23 of change-over valve 20 is connected with the first actuator port 24 of change-over valve 20 and the second actuator port 25 of change-over valve 20 respectively, the second oil inlet 22 of change-over valve 20 is connected with the 3rd actuator port 26 of change-over valve 20, now can not operate front leg strut Vertical Cylinders 43, side leg Vertical Cylinders 53 and side leg cross cylinder 54, but can give the other system fuel feeding of car hosit, such as rotary system, the a/c system etc. of getting on the bus.
Front leg strut change-over valve 41 is for controlling the action of front leg strut Vertical Cylinders 43, and preferably, front leg strut change-over valve 41 is three-position four-way valve, and when front leg strut change-over valve 41 is positioned at the first working position (Figure 3 shows that upper), front leg strut change-over valve 41 disconnects.
When front leg strut change-over valve 41 is positioned at the second working position (Figure 3 shows that the next), the oil inlet and outlet 44 of front leg strut change-over valve 41 is connected with the first actuator port 46 of front leg strut change-over valve 41, the return opening 45 of front leg strut change-over valve 41 disconnects with the second actuator port 47 of front leg strut change-over valve 41, now can carry out the operation of front leg strut Vertical Cylinders 43, if coordinate change-over valve 20 to be positioned at the first working position, can carry out the operation of stretching out of front leg strut Vertical Cylinders 43, hydraulic oil enters the rodless cavity of front leg strut Vertical Cylinders 43 from the second actuator port 25 of change-over valve 20 by front leg strut change-over valve 41, hydraulic oil in the rod chamber of front leg strut Vertical Cylinders 43 enters the first actuator port 24 of change-over valve 20, if coordinate change-over valve 20 to be positioned at the second working position, can carry out the retraction operation of front leg strut Vertical Cylinders 43, hydraulic oil enters the rod chamber of front leg strut Vertical Cylinders 43 from the first actuator port 24 of change-over valve 20, the hydraulic oil in the rodless cavity of front leg strut Vertical Cylinders 43 enters respectively the second actuator port 25 of change-over valve 20 by control cock 60 and front leg strut change-over valve 41.
When front leg strut change-over valve 41 is positioned at the 3rd working position (Figure 3 shows that meta), front leg strut change-over valve 41 disconnects.
Certainly, front leg strut change-over valve 41 also can substitute with 2/2-way valve here, as long as guarantee to be communicated with when a working position, when another working position, disconnects and being communicated with.
Side leg change-over valve 51 is for controlling the action of side leg Vertical Cylinders 53 and side leg cross cylinder 54, preferably, side leg change-over valve 51 is three-position four-way valve, when side leg change-over valve 51 is positioned at the first working position (Figure 3 shows that upper), the oil inlet and outlet 55 of side leg change-over valve 51 is connected with the first actuator port 57 of side leg change-over valve 51, the return opening 56 of side leg change-over valve 51 disconnects with the second actuator port 58 of side leg change-over valve 51, now can carry out the operation of side leg Vertical Cylinders 53, while coordinating change-over valve 20 to be positioned at the first working position, can carry out the operation of stretching out of side leg Vertical Cylinders 53, while coordinating change-over valve 20 to be positioned at the second working position, can carry out the retraction operation of side leg Vertical Cylinders 53.
When side leg change-over valve 51 is positioned at the second working position (Figure 3 shows that the next), the oil inlet and outlet 55 of side leg change-over valve 51 is connected with the second actuator port 58 of side leg change-over valve 51, the return opening 56 of side leg change-over valve 51 disconnects with the first actuator port 57 of side leg change-over valve 51, now can carry out the operation of side leg cross cylinder 54, while coordinating change-over valve 20 to be positioned at the first working position, can carry out the operation of stretching out of side leg cross cylinder 54, while coordinating change-over valve 20 to be positioned at the second working position, can carry out the retraction operation of side leg cross cylinder 54.
Main effect of the present utility model is exactly when the supporting leg of car hosit is operated, operator is without the retraction of considering front leg strut Vertical Cylinders 43, the conventional thought that meets normal running, simplified using method, also avoided causing because of violation operation the damage of other parts of car hosit simultaneously.Concrete combination is referring to Fig. 5, when change-over valve 20 is positioned at the second working position, and front leg strut change-over valve 41 disconnects while being communicated with, the hydraulic oil that P mouth flows into flows into the rod chamber of front leg strut Vertical Cylinders 43 from the first actuator port 24 of change-over valve 20, hydraulic oil in the rodless cavity of front leg strut Vertical Cylinders 43 enters the second actuator port 25 of change-over valve 20 by control cock 60, through T mouth, flow out, front leg strut Vertical Cylinders 43 can automatic retraction.
Certainly, if change-over valve 20 in the second working position, and front leg strut change-over valve 41 is when be communicated with, the hydraulic oil in the rodless cavity of front leg strut Vertical Cylinders 43 can also flow to by front leg strut change-over valve 41 the second actuator port 25 of change-over valve 20.In a word, no matter whether there is the cooperation of front leg strut change-over valve 41, change-over valve 20 is when the second working position, hydraulic oil in the rodless cavity of front leg strut Vertical Cylinders 43 can flow back into T mouth, when the side leg Vertical Cylinders 53 of any side leg of operation is retracted, front leg strut Vertical Cylinders 43 can be followed synchronously and retract.
Preferably, supporting leg control system also comprises the second hydraulic control one-way valve 70, and the first actuator port 24 of change-over valve 20 is connected with the rod chamber of front leg strut Vertical Cylinders 43 by the second hydraulic control one-way valve 70.
Preferably, front leg strut Vertical Cylinders 43 connects the first bidirectional hydraulic lock 42, and for front leg strut Vertical Cylinders 43 is carried out to pressurize, side leg Vertical Cylinders 53 connects the second bidirectional hydraulic lock 52, for side leg Vertical Cylinders 53 is carried out to pressurize.
Preferably, between the P mouth of maneuvering valve and T mouth, be connected with the second by pass valve 10, the second by pass valves 10 and play safety guard-safeguard effect, determined the top pressure of each hydraulic fluid port output of supporting leg control system.
Preferably, supporting leg control system also comprises safety valve 30, and safety valve 30 plays overload protective function, and the maximum pressure while stretching out for constrained side supporting leg cross cylinder 54 prevents the flexural deformation that side leg cross cylinder 54 overloads cause.
In Fig. 3 to Fig. 9, the solid black direction of arrow is the direction of action of corresponding change-over valve, and the thin direction of arrow is running of hydraulic power oil direction.
As can be seen from the above description, the utility model the above embodiments have realized following technique effect:
1, simple in structure, only need in existing supporting leg control system, increase a control cock, improvement cost is lower;
2, simplify supporting leg retraction operation;
3, avoid misoperation to cause other positions of car hosit to damage.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (10)
1. a supporting leg control system, comprises change-over valve (20), front leg strut change-over valve (41) and front leg strut Vertical Cylinders (43);
First actuator port (24) of described change-over valve (20) is connected with the rod chamber of described front leg strut Vertical Cylinders (43), second actuator port (25) of described change-over valve (20) is connected with the oil inlet and outlet (44) of described front leg strut change-over valve (41), and first actuator port (46) of described front leg strut change-over valve (41) is connected with the rodless cavity of described front leg strut Vertical Cylinders (43);
It is characterized in that, described supporting leg control system also comprises control cock (60), the described rodless cavity of described front leg strut Vertical Cylinders (43) is connected with described second actuator port (25) of described change-over valve (20) by described control cock (60), and described control cock (60) and described front leg strut change-over valve (41) connect;
When described change-over valve (20) is positioned at the first working position, described control cock (60) disconnects;
When described change-over valve (20) is positioned at the second working position, the described rod chamber of described front leg strut Vertical Cylinders (43) is connected with first oil inlet (21) of described change-over valve (20), described control cock (60) is communicated with under hydraulic oil effect, and the described rodless cavity of described front leg strut Vertical Cylinders (43) and the return opening (23) of described change-over valve (20) are connected.
2. supporting leg control system according to claim 1, is characterized in that, described control cock (60) is hydraulicchange-over valve, and the control port of described hydraulicchange-over valve is connected with described first actuator port (24) of described change-over valve (20).
3. supporting leg control system according to claim 1, is characterized in that, described control cock (60) is check valve.
4. supporting leg control system according to claim 1, is characterized in that, described control cock (60) is hydraulic control one-way valve, and the control port of described hydraulic control one-way valve is connected with described first actuator port (24) of described change-over valve (20).
5. supporting leg control system according to claim 1, is characterized in that, described control cock (60) is by pass valve.
6. supporting leg control system according to claim 1, is characterized in that,
When described change-over valve (20) is positioned at described the first working position, described first oil inlet (21) of described change-over valve (20) is connected with described second actuator port (25) of described change-over valve (20), and the described return opening (23) of described change-over valve (20) is connected with described first actuator port (24) of described change-over valve (20);
When described change-over valve (20) is positioned at described the second working position, described first oil inlet (21) of described change-over valve (20) is connected with described first actuator port (24) of described change-over valve (20), and the described return opening (23) of described change-over valve (20) is connected with described second actuator port (25) of described change-over valve (20).
7. supporting leg control system according to claim 1, is characterized in that,
When described front leg strut change-over valve (41) is positioned at the first working position, described front leg strut change-over valve (41) disconnects;
When described front leg strut change-over valve (41) is positioned at the second working position, the described oil inlet and outlet (44) of described front leg strut change-over valve (41) is connected with described first actuator port (46) of described front leg strut change-over valve (41).
8. according to the supporting leg control system described in any one in claim 1 to 7, it is characterized in that, described supporting leg control system also comprises the second hydraulic control one-way valve (70), described first actuator port (24) of described change-over valve (20) is connected with the described rod chamber of described front leg strut Vertical Cylinders (43) by described the second hydraulic control one-way valve (70), and the control port of described the second hydraulic control one-way valve (70) is connected with described second actuator port (25) of described change-over valve (20).
9. according to the supporting leg control system described in any one in claim 1 to 7, it is characterized in that, described supporting leg control system also comprises for described front leg strut Vertical Cylinders (43) being carried out to first bidirectional hydraulic lock (42) of pressurize.
10. a car hosit, comprising:
Four side legs, lay respectively at the relative both sides of described car hosit;
Front leg strut, is positioned at the front side of described car hosit; And
Supporting leg control system, for controlling the flexible of described four side legs and described front leg strut;
It is characterized in that, described supporting leg control system is the supporting leg control system described in any one in claim 1 to 9, and described front leg strut Vertical Cylinders (43) is corresponding to described front leg strut setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320652572.9U CN203513142U (en) | 2013-10-22 | 2013-10-22 | Automobile crane and support leg control system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320652572.9U CN203513142U (en) | 2013-10-22 | 2013-10-22 | Automobile crane and support leg control system thereof |
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| Publication Number | Publication Date |
|---|---|
| CN203513142U true CN203513142U (en) | 2014-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320652572.9U Expired - Lifetime CN203513142U (en) | 2013-10-22 | 2013-10-22 | Automobile crane and support leg control system thereof |
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| CN (1) | CN203513142U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832469A (en) * | 2014-05-20 | 2015-08-12 | 北汽福田汽车股份有限公司 | Stroke control system for supporting leg oil cylinder and automobile crane with stroke control system |
| CN112855650A (en) * | 2019-11-27 | 2021-05-28 | 河北雷萨重型工程机械有限责任公司 | Landing leg hydraulic control system and crane |
| CN116906386A (en) * | 2023-09-12 | 2023-10-20 | 临工重机股份有限公司 | Engineering machinery control system |
-
2013
- 2013-10-22 CN CN201320652572.9U patent/CN203513142U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104832469A (en) * | 2014-05-20 | 2015-08-12 | 北汽福田汽车股份有限公司 | Stroke control system for supporting leg oil cylinder and automobile crane with stroke control system |
| CN112855650A (en) * | 2019-11-27 | 2021-05-28 | 河北雷萨重型工程机械有限责任公司 | Landing leg hydraulic control system and crane |
| 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 |
| CN116906386A (en) * | 2023-09-12 | 2023-10-20 | 临工重机股份有限公司 | Engineering machinery control system |
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Granted publication date: 20140402 |