CN202296849U - Crane landing leg, landing leg hydraulic system and crane - Google Patents
Crane landing leg, landing leg hydraulic system and crane Download PDFInfo
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- CN202296849U CN202296849U CN2011203371965U CN201120337196U CN202296849U CN 202296849 U CN202296849 U CN 202296849U CN 2011203371965 U CN2011203371965 U CN 2011203371965U CN 201120337196 U CN201120337196 U CN 201120337196U CN 202296849 U CN202296849 U CN 202296849U
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- supporting leg
- horizontal support
- support legs
- cross cylinder
- hoisting crane
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Abstract
The utility model discloses a crane landing leg, a landing leg hydraulic system and a crane. The crane landing leg comprises a first level horizontal landing leg, a second level horizontal landing leg and a fixed landing leg, wherein the second level horizontal landing leg is sleeved on the first level horizontal landing leg, and the first level horizontal landing leg is sleeved on the fixed landing leg, the crane landing leg is characterized in that a first horizontal oil cylinder is arranged between the first level horizontal landing leg and the fixed landing leg, and a second horizontal oil cylinder is arranged between the second level horizontal landing leg and the first level horizontal landing leg. The crane landing leg has a high strength at a semi-stretching state so as to greatly improve the lifting performance of the whole crane. The utility model also relates to a landing leg hydraulic system for controlling the crane landing leg and a crane provided with the crane landing leg.
Description
Technical field
The utility model relates to technical field of engineering machinery, particularly the hoisting crane supporting leg.The utility model also relates to and is used to the hoisting crane controlling the supporting leg hydraulic efficiency pressure system of said hoisting crane supporting leg and be provided with said hoisting crane supporting leg or supporting leg hydraulic efficiency pressure system.
Background technology
Hoisting crane is the construction machinery and equipment of a kind of vertical-lift within the specific limits or vertical-lift and horizontal carrying heavy goods.
For guaranteeing to have at work enough safetys and stability; Promptly guarantee the anti-safety factor of tumbling of complete machine; The hoisting crane operated by rotary motion has telescopic leg, so that under the condition that does not increase width over sides of car body, for hoisting crane provides bigger supporting span; Thereby under the prerequisite that does not reduce the hoisting crane manoevreability, improve its load-carrying ability.
Telescopic leg mainly is made up of fixed supporting leg and movable supporting legs; Fixed supporting leg and movable supporting legs are welded into the parts of box type construction for adopting steel plate materials; Movable supporting legs is sleeved on fixed supporting leg during assembling, under the effect of driver train, can in fixed supporting leg, stretch back and forth by along continuous straight runs; Be used for when operation, supporting whole fuselage, and vertical support power be delivered to ground through leg disc.
At present, the supporting leg on large-tonnage wheel crane chassis mainly is single cross cylinder supporting leg, is controlled the expanding-contracting action of two-stage horizontal support legs (one-level horizontal support legs and secondary horizontal support legs) by a cross cylinder and supporting leg rope row.
Please refer to Fig. 1, Fig. 1 is the inner structure scheme drawing of single cross cylinder supporting leg of existing wheel crane.
As shown in the figure; The piston rod of cross cylinder 4 is connected on the D point of fixed supporting leg 3; Cylinder barrel is connected on the C point of one-level horizontal support legs 1; The first pulley 5-1 and the second pulley 5-2 among the supporting leg rope row 5 are fixed on the one-level horizontal support legs 1, and rope row one end is connected on the A point of fixed supporting leg 3, and the other end is connected on the B point of secondary horizontal support legs 2.
Please refer to Fig. 2, Fig. 2 is the hydraulic schematic diagram of single cross cylinder supporting leg shown in Figure 1.
Cross cylinder stretches out operating mode: solenoid directional control valve 6-1-Y04a gets; Hydraulic oil flows out the back from P mouth control of access valve group 6 by the Hydraulic Pump pressure port; Through flowing out from the A mouth behind the solenoid directional control valve 6-1; Get into the big chamber (rodless cavity) of cross cylinder 4, directly oil return of the loculus of cross cylinder 4 (rod chamber), this moment, the cross cylinder piston rod stretched out.
Cross cylinder withdrawal operating mode: solenoid directional control valve 6-1-Y04b gets; Hydraulic oil flows out the back from P mouth control of access valve group 6 by the Hydraulic Pump pressure port; Through flowing out from the B mouth behind the solenoid directional control valve 6-1; Get into the loculus of cross cylinder 4, the direct oil return in big chamber of cross cylinder 4, cross cylinder piston rod withdrawal this moment.
This system is flexible by solenoid directional control valve 6-1 controlling level oil cylinder 4, when cross cylinder 4 stretches out, drives one-level horizontal support legs 1 and stretches out, and one-level horizontal support legs 1 is protruding relatively and secondary horizontal support legs 2 is under supporting leg rope row 5 pulling function; When cross cylinder 1 is withdrawn, drive 1 withdrawal of one-level horizontal support legs, and secondary horizontal support legs 2 relative one-level horizontal support legs 1 under supporting leg rope row 5 pulling function is withdrawn inwards.
It is thus clear that; In whole telescopic process; In the time of cross cylinder 4 action, one-level horizontal support legs 1 receives its control to follow cross cylinder 4 move together, and secondary horizontal support legs 2 stretches through supporting leg rope row 5 the relative one-level horizontal support legs 1 of pulling function simultaneously; Be that one-level horizontal support legs 1 has relative motion with secondary horizontal support legs 2, both can only move simultaneously.
Please in the lump with reference to figure 3, Fig. 3 is in the schematic perspective view when partly stretching state for single cross cylinder supporting leg shown in Figure 1.
When horizontal support legs is in when partly stretching operating mode, through supporting leg rope row's effect, it is half that one-level horizontal support legs 1 and secondary horizontal support legs 2 respectively stretch out, and all do not overlap.At this moment, can horizontal support legs be divided into two parts, be respectively a partial sum b part (see figure 1), wherein a partly is merely the individual layer movable supporting legs, and promptly the secondary movable supporting legs 2, and having only b partly is the double-decker that is overlaped by one-level movable supporting legs 1 and secondary movable supporting legs 2.The intensity of this structure a part is lower, cause car load the load-carrying ability of partly stretching state a little less than.
Therefore, how improving the intensity of hoisting crane supporting leg when partly stretching state, and then improve the load-carrying ability of hoisting crane, is the present technical issues that need to address of those skilled in the art.
The utility model content
First purpose of the utility model provides a kind of hoisting crane supporting leg.This hoisting crane supporting leg has higher intensity when partly stretching state, can significantly promote the lifting performance of car load.
Second purpose of the utility model provides a kind of supporting leg hydraulic efficiency pressure system that is used to control said hoisting crane supporting leg.
The 3rd purpose of the utility model provides a kind of hoisting crane that is provided with said hoisting crane supporting leg.
In order to realize above-mentioned first purpose; The utility model provides a kind of hoisting crane supporting leg; Comprise one-level horizontal support legs, secondary horizontal support legs and fixed supporting leg, said secondary horizontal support legs is set in said one-level horizontal support legs, and said one-level horizontal support legs is set in said fixed supporting leg; Be provided with first cross cylinder between said one-level horizontal support legs and the fixed supporting leg, be provided with second cross cylinder between said secondary horizontal support legs and the one-level horizontal support legs.
Preferably, the piston rod of said first cross cylinder and cylinder barrel are connected to said fixed supporting leg and one-level horizontal support legs.
Preferably, the piston rod of said second cross cylinder and cylinder barrel are connected to said secondary horizontal support legs and one-level horizontal support legs.
Preferably, only has the two-stage horizontal support legs.
In order to realize above-mentioned second purpose, the utility model also provides a kind of supporting leg hydraulic efficiency pressure system, is used to control above-mentioned each described hoisting crane supporting leg, comprises first one way sequence valve and second one way sequence valve; The oil inlet of said first one way sequence valve and oil outlet are connected with the big chamber of said first cross cylinder and second cross cylinder respectively; The oil inlet of said second one way sequence valve and oil outlet are connected with the loculus of said second cross cylinder and first cross cylinder respectively.
Big cavity pressure when preferably, the setting pressure of said first one way sequence valve stretches out greater than said first cross cylinder; Little cavity pressure when the setting pressure of said second one way sequence valve is withdrawn greater than said second cross cylinder.
Preferably, said first one way sequence valve and/or second one way sequence valve are integrated in the control cock group of said supporting leg hydraulic efficiency pressure system.
In order to realize above-mentioned the 3rd purpose, the utility model also provides a kind of hoisting crane, comprises hoisting crane body, hoisting crane supporting leg and supporting leg hydraulic efficiency pressure system, and said hoisting crane supporting leg is above-mentioned each described hoisting crane supporting leg.
Preferably, said supporting leg hydraulic efficiency pressure system is above-mentioned each described supporting leg hydraulic efficiency pressure system.
Preferably, be specially the large-tonnage wheel crane.
The hoisting crane supporting leg that the utility model provided is the same with prior art to have the cross cylinder Telescopic; Difference is to have cancelled supporting leg rope row and has increased a cross cylinder; Control the two-stage horizontal support legs respectively by first cross cylinder and second cross cylinder; Promptly first cross cylinder connection fixed supporting leg and one-level horizontal support legs are controlled one-level horizontal support legs and secondary horizontal support legs synchronization telescope, and it is flexible separately that secondary cross cylinder connection one-level horizontal support legs and secondary horizontal support legs are controlled the secondary horizontal support legs; When stretching out, first cross cylinder stretches out earlier, and drive one-level horizontal support legs, secondary horizontal support legs stretch out synchronously, and second cross cylinder stretches out behind the arrival dead point, drives the secondary horizontal support legs and stretches out separately; In the time of withdrawal, the withdrawal of second cross cylinder elder generation drives the secondary horizontal support legs and withdraws separately, arrives first cross cylinder withdrawal behind the dead point, and drive one-level horizontal support legs, secondary horizontal support legs are withdrawn synchronously; When whole horizontal support legs is in when partly stretching state; Do not have relative motion between the two-stage horizontal support legs, at this moment, its outwardly directed part all is in one-level horizontal support legs and the equitant state of secondary horizontal support legs; Horizontal support legs intensity is higher, and the car load lifting performance is higher.
The supporting leg hydraulic efficiency pressure system that the utility model provides is provided with first one way sequence valve and second one way sequence valve; The oil inlet of wherein said first one way sequence valve and oil outlet are connected with the big chamber of said first cross cylinder and second cross cylinder respectively, and the oil inlet of said second one way sequence valve and oil outlet are connected with the loculus of said second cross cylinder and first cross cylinder respectively.Through first one way sequence valve; May command first cross cylinder stretches out earlier and stretches out behind second cross cylinder; Through second one way sequence valve; May command second cross cylinder is withdrawn earlier and is withdrawn behind first cross cylinder, thereby guarantees that wheel crane supporting leg hydraulic efficiency pressure system in safe and reliable work, realizes the sequentially-operating of two-stage horizontal support legs.
The hoisting crane that the utility model provided is provided with above-mentioned hoisting crane supporting leg, because above-mentioned hoisting crane supporting leg has above-mentioned technique effect, the hoisting crane with this hoisting crane supporting leg also should possess the corresponding techniques effect.
Description of drawings
Fig. 1 is the inner structure scheme drawing of single cross cylinder supporting leg of existing wheel crane;
Fig. 2 is the hydraulic schematic diagram of single cross cylinder supporting leg shown in Figure 1;
Fig. 3 is in the block diagram when partly stretching state for single cross cylinder supporting leg shown in Figure 1;
Fig. 4 provides the inner structure scheme drawing of a kind of specific embodiment of hoisting crane supporting leg for the utility model;
Fig. 5 is in the block diagram when partly stretching state for hoisting crane supporting leg shown in Figure 4;
Fig. 6 provides the hydraulic schematic diagram of first kind of specific embodiment of supporting leg hydraulic efficiency pressure system for the utility model;
Fig. 7 provides the hydraulic schematic diagram of second kind of specific embodiment of supporting leg hydraulic efficiency pressure system for the utility model;
Fig. 8 provides the hydraulic schematic diagram of the third specific embodiment of supporting leg hydraulic efficiency pressure system for the utility model.
Among Fig. 1 to Fig. 3:
1. one-level horizontal support legs; 2. secondary horizontal support legs; 3. fixed supporting leg; 4. cross cylinder; 5. the supporting leg rope is arranged; 5-1. first pulley; 5-2. second pulley; 6. control cock group; 6-1. solenoid directional control valve.
Among Fig. 4 to Fig. 8:
10. one-level horizontal support legs; 20. secondary horizontal support legs; 30. fixed supporting leg; 40-1. first cross cylinder; 40-2. second cross cylinder; 50. Hydraulic Pump; 60. control cock group; 60-1. solenoid directional control valve; 70-1. first one way sequence valve; 70-2. second one way sequence valve; 80. hydraulic reservoir; 90. oil filter; 100. by pass valve.
The specific embodiment
The core of the utility model provides a kind of hoisting crane supporting leg.This hoisting crane supporting leg has higher intensity when partly stretching state, can significantly promote the lifting performance of car load.
Another core of the utility model provides a kind of supporting leg hydraulic efficiency pressure system that is used to control said hoisting crane supporting leg, and the hoisting crane that is provided with said hoisting crane supporting leg.
In order to make those skilled in the art person understand the utility model scheme better, the utility model is done further to specify below in conjunction with the accompanying drawing and the specific embodiment.
The term in expression orientation such as " upper and lower, left and right " among this paper is based on the position relation of accompanying drawing; Should it be interpreted as the absolute qualification to protection domain; In like manner; Terms such as " first, second " only is for the ease of describing, and with the different constituent elementss that differentiation has same names, does not represent successively or the primary and secondary relation.
Please refer to Fig. 4, Fig. 4 provides the inner structure scheme drawing of a kind of specific embodiment of hoisting crane supporting leg for the utility model.
In a kind of specific embodiment; The hoisting crane supporting leg that the utility model provides is the two-stage horizontal support legs; Comprise one-level horizontal support legs 10, secondary horizontal support legs 20 and fixed supporting leg 30, wherein secondary horizontal support legs 20 is set in one-level horizontal support legs 10, and one-level horizontal support legs 10 is set in fixed supporting leg 30; Be provided with the first cross cylinder 40-1 between one-level horizontal support legs 10 and the fixed supporting leg 30, be provided with the second cross cylinder 40-2 between secondary horizontal support legs 20 and the one-level horizontal support legs 10.
The piston rod of the first cross cylinder 40-1 is connected on the D point of fixed supporting leg 30, and cylinder barrel is connected on the C point of one-level horizontal support legs 10; The piston rod of the second cross cylinder 40-2 is connected on the A point of secondary horizontal support legs 20, and cylinder barrel is connected on the B point of one-level horizontal support legs 10.
Certainly; The above-mentioned first cross cylinder 40-1 and the second cross cylinder 40-2 also can install by reversing sense; Promptly the piston rod of the first cross cylinder 40-1 and cylinder barrel are connected on the C point and D point of fixed supporting leg 30; The piston rod of the second cross cylinder 40-2 and cylinder barrel are connected on the B point and A point of secondary horizontal support legs 20, can realize the utility model purpose equally.
The first cross cylinder 40-1 and the second cross cylinder 40-2 control the two-stage horizontal support legs respectively; I.e. first cross cylinder 40-1 connection fixed supporting leg 30 is controlled one-level horizontal support legs 10 and secondary horizontal support legs 20 synchronization telescopes with one-level horizontal support legs 10, and secondary cross cylinder 40-2 connection one-level horizontal support legs 10 is controlled secondary horizontal support legs 20 with secondary horizontal support legs 20 and stretched separately.
When supporting leg stretched out, the first cross cylinder 40-1 stretched out earlier, and drive one-level horizontal support legs 10, secondary horizontal support legs 20 stretch out synchronously, and the second cross cylinder 40-2 stretches out behind the arrival dead point, drives secondary horizontal support legs 20 and stretches out separately; During the supporting leg withdrawal, the second cross cylinder 40-2 withdraws earlier, drives secondary horizontal support legs 20 withdrawal separately, arrives first cross cylinder 40-1 withdrawal behind the dead point, and drive one-level horizontal support legs 10, secondary horizontal support legs 20 are withdrawn synchronously.
Please refer to Fig. 5, Fig. 5 is in the block diagram when partly stretching state for hoisting crane supporting leg shown in Figure 4.
When whole horizontal support legs is in when partly stretching state; Do not have relative motion between the two-stage horizontal support legs, at this moment, its outwardly directed a part all is in one-level horizontal support legs 10 and secondary horizontal support legs 20 equitant states; Horizontal support legs intensity is higher, and the car load lifting performance is higher.
Please refer to Fig. 6, Fig. 6 provides the hydraulic schematic diagram of first kind of specific embodiment of supporting leg hydraulic efficiency pressure system for the utility model.
In order to realize control to above-mentioned pair of cross cylinder supporting leg; The utility model provides a kind of supporting leg hydraulic efficiency pressure system, and this system mainly is made up of Hydraulic Pump 50, control cock group 60, the first cross cylinder 40-1, the second cross cylinder 40-2, the first one way sequence valve 70-1 and the second one way sequence valve 70-2.
Sequence valve is when control presssure reaches setting, and spool is opened, and fluid is passed through, with the pressure-gradient control valve of control actuating component sequentially-operating; One way sequence valve is the combination of check valve and sequence valve, and this valve is as sequence valve work when the fluid forward flow; This valve is inoperative when reverse fluid flow, the fluid proper flow.
Solenoid directional control valve 60-1 in the control cock group 60 is the 3-position 4-way solenoid directional control valve, has first hydraulic fluid port, second hydraulic fluid port, the 3rd hydraulic fluid port and the 4th hydraulic fluid port, and has three kinds of mode of operations: at first mode of operation, its each hydraulic fluid port all ends; At second mode of operation, its first hydraulic fluid port is communicated with the 3rd hydraulic fluid port, and second hydraulic fluid port is communicated with the 4th hydraulic fluid port; At the 4th mode of operation, its first hydraulic fluid port is communicated with the 4th hydraulic fluid port, and second hydraulic fluid port is communicated with the 3rd hydraulic fluid port.
The 3rd hydraulic fluid port of solenoid directional control valve 60-1 is connected in oil pump 50; The 4th hydraulic fluid port is a return opening, is connected in hydraulic reservoir 80, and on oil return circuit, is provided with oil filter 90; The oil inlet of by pass valve 100 (also claiming safety valve) is communicated with the working connection of oil pump, and oil outlet is communicated with oil return circuit.
The P hydraulic fluid port of control cock group 60 is an oil inlet, and the T hydraulic fluid port is a return opening, and the big chamber of the first cross cylinder 40-1 and loculus are communicated with the A hydraulic fluid port and the B hydraulic fluid port of control cock group 60 respectively.
The oil inlet of the first one way sequence valve 70-1 is communicated with the big chamber of the first cross cylinder 40-1, oil outlet is communicated with the big chamber of the second cross cylinder 40-2; The second one way sequence valve 70-2 is integrated in control cock group 60; Control cock group 60 is provided with the B1 hydraulic fluid port that is connected with its oil inlet; The oil inlet of the second one way sequence valve 40-2 is communicated with second hydraulic fluid port of solenoid directional control valve 60-1, oil outlet is communicated with the B hydraulic fluid port of control cock group 60, and the B1 hydraulic fluid port of control cock group 60 is communicated with the loculus of the second cross cylinder 40-2.
For guaranteeing two-stage horizontal support legs sequentially-operating, the big cavity pressure the when setting pressure of the first one way sequence valve 70-1 should stretch out greater than the first cross cylinder 40-1; Little cavity pressure when the setting pressure of the second one way sequence valve 70-2 should be withdrawn greater than the second cross cylinder 40-2.
The working process of above-mentioned supporting leg hydraulic efficiency pressure system is following:
First cross cylinder stretches out operating mode: solenoid directional control valve 60-1-Y04a gets; Hydraulic oil flows out the back from P mouth control of access valve group 60 by the Hydraulic Pump pressure port; Flow out from the A hydraulic fluid port through solenoid directional control valve; Get into the big chamber of the first cross cylinder 40-1, the direct oil return of the loculus of the first cross cylinder 40-1, the piston rod of the first cross cylinder 40-1 begins to stretch out.System pressure is less than the setting pressure of the first one way sequence valve 70-1 at this moment; The first one way sequence valve 70-1 closes; Hydraulic oil can't get into the second cross cylinder 40-2; The second cross cylinder 40-2 is failure to actuate, and has only the stopper rod of first cross cylinder 40-1 alive to stretch out, and one-level horizontal support legs 10 stretches out with secondary horizontal support legs 20 synchronously.
Second cross cylinder stretches out operating mode: after the piston rod of the first cross cylinder 40-1 reached the dead point, system built the pressure, reach the setting pressure of the first one way sequence valve 70-1 when system pressure after, the first one way sequence valve 70-1 opens.Hydraulic oil flows out the big chamber that flows into the second cross cylinder 40-2 through the first one way sequence valve 70-1 from the big chamber of the first cross cylinder 40-1; The direct oil return of the loculus of the second cross cylinder 40-2; The piston rod of the second cross cylinder 40-2 begins to stretch out, and promptly second horizontal support legs 20 stretches out separately.
Second cross cylinder withdrawal operating mode: solenoid directional control valve 60-1-Y04b gets; Hydraulic oil flows out the back from P mouth control of access valve group 60 by the Hydraulic Pump pressure port; Flow out from the B1 mouth through solenoid directional control valve, get into the loculus of the second cross cylinder 40-2, the big chamber of the second cross cylinder 40-2 gets into the big chamber of the first cross cylinder 40-1 through the check valve among the first one way sequence valve 70-1; Oil return then, the piston rod of the second cross cylinder 40-2 begin withdrawal.System pressure is less than the setting pressure of the second one way sequence valve 70-2 in the control cock group at this moment; The second one way sequence valve 70-2 closes; Hydraulic oil can't get into the loculus of the first cross cylinder 40-1; The first cross cylinder 40-1 is failure to actuate, and has only the piston rod withdrawal of the second cross cylinder 40-2, and promptly secondary horizontal support legs 20 is withdrawn separately.
The withdrawal of first cross cylinder: after the piston rod of the second cross cylinder 40-2 was reduced to the dead point, system built the pressure, and after system pressure reached the setting pressure of the second one way sequence valve 70-2 in the control cock group, the second one way sequence valve 70-2 opened.Hydraulic oil flows out the back from P mouth control of access valve group 60 by the Hydraulic Pump pressure port; Through solenoid directional control valve 60-1; Flow out from the B mouth through the second one way sequence valve 70-2 in the control cock group 60 then; Get into the loculus of the first cross cylinder 40-1, the direct oil return in big chamber of the first cross cylinder 40-1, the piston rod of the first cross cylinder 40-1 begins withdrawal.
Through the first one way sequence valve 70-1 and the second one way sequence valve 70-2, can guarantee wheel crane supporting leg hydraulic efficiency pressure system in safe and reliable work, realize the sequentially-operating of two-stage horizontal support legs.
Please refer to Fig. 7, Fig. 7 provides the hydraulic schematic diagram of second kind of specific embodiment of supporting leg hydraulic efficiency pressure system for the utility model.
The difference of this supporting leg hydraulic efficiency pressure system and above-mentioned first kind of supporting leg hydraulic efficiency pressure system just is; The first one way sequence valve 70-1 also is integrated in control cock group 60; Its oil inlet is communicated with first hydraulic fluid port of solenoid directional control valve 60-1; Oil outlet is communicated with the A1 hydraulic fluid port of control cock group 60, and the big chamber of the second cross cylinder 40-2 is communicated with the A1 hydraulic fluid port of control cock group 60.
Please refer to Fig. 8, Fig. 8 provides the hydraulic schematic diagram of the third specific embodiment of supporting leg hydraulic efficiency pressure system for the utility model.
The difference of this supporting leg hydraulic efficiency pressure system and above-mentioned first kind of supporting leg hydraulic efficiency pressure system just is; The second one way sequence valve 70-2 is not integrated in control cock group 60; Its oil inlet and oil outlet are communicated with the loculus of the first cross cylinder 40-1 and the second cross cylinder 40-2 respectively, and the loculus of the second cross cylinder 40-2 is communicated with the B hydraulic fluid port of control cock group 60.
It is thus clear that under the prerequisite that guarantees the first cross cylinder 40-1 and the second cross cylinder 40-2 sequential working, the first one way sequence valve 70-1 has multiple the connection and arrangement with the second one way sequence valve 70-2 on hydraulic circuit.Because mode in the cards is more, be to practice thrift length, this paper is casehistory no longer one by one just.
Above-mentioned supporting leg hydraulic efficiency pressure system only is a kind of preferred version, and its concrete mode is not limited thereto, and can make pointed adjustment according to actual needs on this basis, thereby obtain different embodiment.For example, can green phase to control loop independently the control first cross cylinder 40-1 and second cross cylinder 40-2 or the like separately respectively.
Except above-mentioned hoisting crane supporting leg and supporting leg hydraulic efficiency pressure system; The utility model also provides a kind of hoisting crane; Comprise hoisting crane body, hoisting crane supporting leg and supporting leg hydraulic efficiency pressure system; Said hoisting crane supporting leg is a hoisting crane supporting leg mentioned above, and said supporting leg hydraulic efficiency pressure system is a supporting leg hydraulic efficiency pressure system mentioned above, and all the other structures please refer to prior art.
Particularly, said hoisting crane is the large-tonnage wheel crane.
More than hoisting crane supporting leg, supporting leg hydraulic efficiency pressure system and hoisting crane that the utility model provided have been carried out detailed introduction.Used concrete example among this paper the principle and the embodiment of the utility model are set forth, the explanation of above embodiment just is used to help to understand the core concept of the utility model.Should be understood that; For those skilled in the art; Under the prerequisite that does not break away from the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (10)
1. hoisting crane supporting leg; Comprise one-level horizontal support legs, secondary horizontal support legs and fixed supporting leg; Said secondary horizontal support legs is set in said one-level horizontal support legs, and said one-level horizontal support legs is set in said fixed supporting leg, it is characterized in that; Be provided with first cross cylinder between said one-level horizontal support legs and the fixed supporting leg, be provided with second cross cylinder between said secondary horizontal support legs and the one-level horizontal support legs.
2. hoisting crane supporting leg according to claim 1 is characterized in that, the piston rod of said first cross cylinder and cylinder barrel are connected to said fixed supporting leg and one-level horizontal support legs.
3. hoisting crane supporting leg according to claim 1 is characterized in that, the piston rod of said second cross cylinder and cylinder barrel are connected to said secondary horizontal support legs and one-level horizontal support legs.
4. according to each described hoisting crane supporting leg of claim 1 to 3, it is characterized in that only having the two-stage horizontal support legs.
5. a supporting leg hydraulic efficiency pressure system is characterized in that, is used to control aforesaid right requirement 1 to 4 each described hoisting crane supporting leg, comprises first one way sequence valve and second one way sequence valve; The oil inlet of said first one way sequence valve and oil outlet are connected with the big chamber of said first cross cylinder and second cross cylinder respectively; The oil inlet of said second one way sequence valve and oil outlet are connected with the loculus of said second cross cylinder and first cross cylinder respectively.
6. supporting leg hydraulic efficiency pressure system according to claim 5 is characterized in that, the big cavity pressure the when setting pressure of said first one way sequence valve stretches out greater than said first cross cylinder; Little cavity pressure when the setting pressure of said second one way sequence valve is withdrawn greater than said second cross cylinder.
7. supporting leg hydraulic efficiency pressure system according to claim 6 is characterized in that, said first one way sequence valve and/or second one way sequence valve are integrated in the control cock group of said supporting leg hydraulic efficiency pressure system.
8. a hoisting crane comprises hoisting crane body, hoisting crane supporting leg and supporting leg hydraulic efficiency pressure system, it is characterized in that, said hoisting crane supporting leg is aforesaid right requirement 1 to 4 each described hoisting crane supporting leg.
9. hoisting crane according to claim 8 is characterized in that, said supporting leg hydraulic efficiency pressure system is aforesaid right requirement 5 to 7 each described supporting leg hydraulic efficiency pressure systems.
10. hoisting crane according to claim 9 is characterized in that, is specially the large-tonnage wheel crane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203371965U CN202296849U (en) | 2011-09-08 | 2011-09-08 | Crane landing leg, landing leg hydraulic system and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203371965U CN202296849U (en) | 2011-09-08 | 2011-09-08 | Crane landing leg, landing leg hydraulic system and crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202296849U true CN202296849U (en) | 2012-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203371965U Expired - Fee Related CN202296849U (en) | 2011-09-08 | 2011-09-08 | Crane landing leg, landing leg hydraulic system and crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202296849U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303813A (en) * | 2011-09-08 | 2012-01-04 | 徐州重型机械有限公司 | Crane support leg, support leg hydraulic system and crane |
| CN106698215A (en) * | 2016-12-12 | 2017-05-24 | 南陵宝恒野生葛种植专业合作社 | Two-stage telescopic arm mechanical arm |
-
2011
- 2011-09-08 CN CN2011203371965U patent/CN202296849U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303813A (en) * | 2011-09-08 | 2012-01-04 | 徐州重型机械有限公司 | Crane support leg, support leg hydraulic system and crane |
| CN102303813B (en) * | 2011-09-08 | 2014-07-16 | 徐州重型机械有限公司 | Crane support leg, support leg hydraulic system and crane |
| CN106698215A (en) * | 2016-12-12 | 2017-05-24 | 南陵宝恒野生葛种植专业合作社 | Two-stage telescopic arm mechanical arm |
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