CN102424036A - Telescopic support leg device and engineering machinery - Google Patents

Telescopic support leg device and engineering machinery Download PDF

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Publication number
CN102424036A
CN102424036A CN2011102315958A CN201110231595A CN102424036A CN 102424036 A CN102424036 A CN 102424036A CN 2011102315958 A CN2011102315958 A CN 2011102315958A CN 201110231595 A CN201110231595 A CN 201110231595A CN 102424036 A CN102424036 A CN 102424036A
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CN
China
Prior art keywords
cylinder
telescopic outrigger
equipment
shoring
telescopic
Prior art date
Application number
CN2011102315958A
Other languages
Chinese (zh)
Inventor
廖荣华
刘云翔
高王灿
Original Assignee
三一集团有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三一集团有限公司 filed Critical 三一集团有限公司
Priority to CN2011102315958A priority Critical patent/CN102424036A/en
Publication of CN102424036A publication Critical patent/CN102424036A/en

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Abstract

The invention discloses a telescopic support leg device of engineering machinery, which comprises a fixed leg and a movable leg, wherein the movable leg is connected with the fixed leg through a horizontal unfolding cylinder, the tail end of the movable leg (11) is provided with a support cylinder (3), a telescopic rod of the unfolding cylinder (2) is provided with a fluid passage, a rodless cavity of the support cylinder (3) is communicated with an external fluid pipeline of the fixed leg through a rodless cavity of the unfolding cylinder (2) and thea fluid passage (211), in addition, an elastic element extending and retracting in the vertical direction is arranged in the support cylinder (3), one end of the elastic element is connected with the top wall or the bottom wall of the support cylinder (3), and the other end of the elastic element is connected with a support rod (32) of the support cylinder (3). The telescopic support leg device has the advantages that the arrangement of work pipelines of the support cylinder is very simple, the installation and the maintenance are more convenient, in addition, when the arrangement mode is adopted, the friction damage between a support leg and the work pipeline of the support cylinderleg when the support leg extends and retracts is avoided, and the work reliability of the support cylinder is enhanced. In addition, the invention also discloses the engineering machinery comprising the telescopic support leg device.

Description

A kind of telescopic outrigger device and construction machinery and equipment
Technical field
The present invention relates to technical field of engineering machinery, particularly a kind of telescopic outrigger device of construction machinery and equipment.In addition, the invention still further relates to the construction machinery and equipment that comprises above-mentioned telescopic outrigger device.
Background technology
Large-scale engineering machineries such as harbour wheel-mounted crane, concrete pump truck are widely used in engineering fields such as harbour, mine, skyscraper and national defence, in order to satisfy its job safety, stable needs, generally around vehicle frame, are provided with telescopic outrigger.
Please refer to Fig. 1, Fig. 1 is the structural representation of a kind of representative type telescopic outrigger device in the prior art.
Telescopic outrigger 1 ' comprises the Convenient table that is connected on the vehicle frame, and Convenient table is generally body structure, and its nested inside has movable leg; Also be provided with telescopic oil cylinder between Convenient table and the movable leg; One end of telescopic oil cylinder connects Convenient table, and the other end connects movable leg, and movable leg can be stretched by the relative fixed leg; The end of movable leg also is provided with support cylinder 2 '.
When construction machinery and equipment is in operating condition; Movable leg is protruding under the effect of telescopic oil cylinder; When extending to certain position, support cylinder 2 ' extends under the effect of hydraulic circuit, and the strut bar of support cylinder firmly is supported on the ground; Thereby make the tire of construction machinery and equipment break away from ground, increase the stability of engineer machinery operation; When engineer machinery operation finished, the strut bar of support cylinder 2 ' was regained, and tire falls ground again after rise.
The hydraulic oil of control support cylinder work is the hydraulic fluid port that connects hydraulic oil source and support cylinder through oil pipe in the prior art, and oil pipe is arranged in the inside of telescopic outrigger.Oil pipe 3 ' is arranged in the inside of telescopic outrigger, need move by the relative fixed supporting leg along with stretching of telescopic outrigger, and oil pipe is easy abrasion relatively, in order to reduce the wearing and tearing of oil pipe 3 ', generally twines drag chain in the outside of oil pipe 3 '.
But the supporting leg inner space is smaller, and the installation and maintenance of drag chain is cumbersome; And the enough spaces of the need of work of drag chain, so the necessary space of the inner structure of telescopic outrigger 1 ' is bigger, even the inner sky of wanting; The intensity that can't stiffened plate increases supporting leg influences the working strength of supporting leg.
And telescopic outrigger 1 ' in-to-in oil pipe 3 ' not only assembles relatively difficulty, and changes also relatively more inconvenient.
Therefore, how a kind of telescopic outrigger device is provided, this telescopic outrigger device internal oil pipe easy mounting, easy to maintenance, and leg structure is compact, working strength is than higher, is those skilled in the art's problem demanding prompt solutions.
Summary of the invention
The object of the invention aims to provide a kind of telescopic outrigger device, and this telescopic outrigger device internal oil pipe is arranged simple, easy mounting, maintenance.Another object of the present invention aims to provide a kind of construction machinery and equipment that comprises above-mentioned telescopic outrigger device.
For solving the problems of the technologies described above; The present invention provides a kind of telescopic outrigger device of construction machinery and equipment; Comprise Convenient table and with said Convenient table through horizontal development cylinder bonded assembly movable leg, the end of said movable leg is provided with shoring, the expansion link of said expansion cylinder has the fluid passage; The external fluid pipeline that rodless cavity and the said fluid passage of the rodless cavity of said shoring through said expansion cylinder is communicated with said Convenient table; And be provided with vertically flexible elastic element in the said shoring, an end of said elastic element connects the roof or the diapire of said shoring, and the other end connects the strut bar of said shoring.
Preferably, said expansion cylinder is a telescopic oil cylinder, and the cylinder body of said telescopic oil cylinder connects said Convenient table, and the expansion link of said telescopic oil cylinder connects said movable leg; And said telescopic outrigger device also is provided with sequence valve, and first hydraulic fluid port of said sequence valve is communicated with said fluid passage, and second hydraulic fluid port of said sequence valve is communicated with the rodless cavity of said shoring.
Preferably, said sequence valve is an one way sequence valve.
Preferably, said elastic element is a coil spring, and said coil spring is set in said strut bar, and said coil spring one end connects the diapire of said shoring, and the other end connects the large end face of said strut bar.
Preferably, also comprise change-over valve, first hydraulic fluid port of said change-over valve connects first oil circuit, and its second hydraulic fluid port is communicated with the rod chamber of said expansion cylinder; The 3rd hydraulic fluid port of said change-over valve is normally closed hydraulic fluid port.
Preferably; Also comprise multiple directional control valve, the oil inlet of said multiple directional control valve is communicated with hydraulic oil source, and the return opening of said multiple directional control valve is communicated with fuel tank; First hydraulic fluid port of said multiple directional control valve is communicated with said first oil circuit, and second hydraulic fluid port of said multiple directional control valve is communicated with the rodless cavity of said expansion cylinder.
Preferably, also comprise hydraulic lock, second hydraulic fluid port of said multiple directional control valve is communicated with the rodless cavity of said expansion cylinder through said hydraulic lock.
Preferably, said change-over valve is a solenoid directional control valve.
Except that the telescopic outrigger device of above-mentioned construction machinery and equipment, the present invention also provides a kind of construction machinery and equipment, comprise vehicle frame and with said vehicle frame bonded assembly telescopic outrigger device, the telescopic outrigger device that said telescopic outrigger device is above-mentioned each described construction machinery and equipment.
The telescopic outrigger device of a kind of construction machinery and equipment provided by the invention; Comprise Convenient table and with said Convenient table through horizontal development cylinder bonded assembly movable leg; The end of movable leg is provided with shoring; The expansion link of expansion cylinder has the fluid passage, the external fluid pipeline that rodless cavity and the said fluid passage of the rodless cavity of shoring through said expansion cylinder is communicated with said Convenient table, and be provided with vertically flexible elastic element in the shoring; One end of elastic element connects the roof or the diapire of shoring, and the other end connects the strut bar of shoring.
The fluid passage that the needed working fluid of shoring is provided with on can the expansion link through expansion cylinder in the telescopic outrigger device provided by the present invention and the rodless cavity of expansion cylinder flow to or flow out to shoring; This arrangement is fairly simple; Installation and maintenance is more convenient; And when this set-up mode has avoided supporting leg to stretch, the fluid circuit of shoring and the friction between the supporting leg, the reliability of increase shoring work.
Additionally, supporting leg inside needn't be provided with drag chain, not only can reduce the overall weight of supporting leg, and can optimize the structure of supporting leg, makes the working strength that its structure is compact more and increase supporting leg.
Description of drawings
Fig. 1 is the structural representation of a kind of representative type telescopic outrigger device in the prior art;
Fig. 2 is a kind of structural representation of the specific embodiment of the telescopic outrigger device of construction machinery and equipment provided by the present invention;
Fig. 3 is the fundamental diagram of telescopic outrigger device mode shown in Figure 2.
Wherein, the corresponding relation between Reference numeral and the component names is among Fig. 1:
1 ' telescopic outrigger; 2 ' support cylinder; 3 ' oil pipe.
Wherein, the corresponding relation between Reference numeral and the component names is among Fig. 2 and Fig. 3:
1 telescopic outrigger; 11 movable leg; 2 expansion cylinders; 21 expansion links; 211 fluid passages; The cylinder body of 22 expansion cylinders; 3 shorings; The cylinder body of 31 shorings; 32 strut bars; 4 coil springs; 5 one way sequence valves; 6 change-over valves; 7 multiple directional control valves; 8 hydraulic lock; The P oil inlet; The T return opening; A first hydraulic fluid port; B second hydraulic fluid port; First hydraulic fluid port of C change-over valve.
The specific embodiment
Core of the present invention aims to provide a kind of telescopic outrigger device of construction machinery and equipment, and this telescopic outrigger device internal oil pipe is arranged simple, easy mounting, maintenance.Another core of the present invention aims to provide a kind of construction machinery and equipment that comprises above-mentioned telescopic outrigger device.
Be without loss of generality; This paper is that the one-level telescopic outrigger is an example with supporting leg in the telescopic outrigger device of construction machinery and equipment; Introduce technical scheme of the present invention, it will be understood by those skilled in the art that the supporting leg in the telescopic outrigger device of not getting rid of among the present invention is the situation of multi-stage expansion supporting leg.
In order to make those skilled in the art understand technical scheme of the present invention better, the present invention is done further detailed description below in conjunction with accompanying drawing and specific embodiment.
Please refer to Fig. 2 and Fig. 3, Fig. 2 is a kind of structural representation of the specific embodiment of the telescopic outrigger device of construction machinery and equipment provided by the present invention; Fig. 3 is the fundamental diagram of telescopic outrigger device mode shown in Figure 2.
In a kind of specific embodiment; The telescopic outrigger device of a kind of construction machinery and equipment provided by the present invention, comprise on the vehicle frame that is connected in said construction machinery and equipment Convenient table and with Convenient table through horizontal development cylinder 2 bonded assembly movable leg 11, usually; Cylinder body 22 1 ends of expansion cylinder connect Convenient table; One end of its expansion link connects movable leg 11, and through the stretching, extension and the retraction of expansion cylinder 2, movable leg 11 can the relative fixed leg be stretched out or bounced back; Certainly, the expansion link 21 of expansion cylinder also can be connected on the Convenient table, and cylinder body also can connect on the movable leg 11.
The end of movable leg 11 also is provided with shoring 3; The expansion link 21 of expansion cylinder has fluid passage 211; The rodless cavity of shoring 3 is through the rodless cavity of said expansion cylinder 2 and the external fluid pipeline of fluid passage 211 connection Convenient tables; Be that support chamber can be through the hydraulic oil import on its cylinder body 31 through the fluid passage in the pipeline connection expansion link; And be provided with vertically flexible elastic element in the shoring 3, an end of elastic element connects the roof or the diapire of shoring 3, and the other end connects the strut bar 32 of shoring.
The quantity of telescopic outrigger 1 is set according to the different operation needs of construction machinery and equipment, can four, also can be six or other quantity, and also can be the multi-joint telescoping supporting leg; Expansion cylinder 2 can be telescopic oil cylinder with shoring 3, also can be telescopic cylinder, and promptly corresponding fluid is hydraulic oil and gas.
The telescopic outrigger device that is provided among the present invention; Before the engineer machinery operation; Under the effect of expansion cylinder 2, movable leg 11 relative fixed legs stretch, after both extend assigned position; Fluid in the fluid circuit can get into shorings 3 along the rodless cavity of expansion cylinder 2 and fluid passage 211 in its expansion link 21, strut bar 32 is stretched out and is supported on the ground; And after engineer machinery operation finished, the strut bar 32 of shoring can along former road discharge cylinder body, return to off working state with the fluid in the rodless cavity under the effect of the restoring force of the deadweight of construction machinery and equipment and elastic element.
The fluid passage 211 that shoring 3 needed working fluids are provided with on can the expansion link through expansion cylinder 2 in the telescopic outrigger device provided by the present invention and the rodless cavity of expansion cylinder 2 flow to or flow out to shoring; This arrangement is fairly simple; Installation and maintenance is more convenient; And when this set-up mode has avoided supporting leg to stretch, the fluid circuit of shoring and the friction between the supporting leg, the reliability of increase shoring work.
Additionally, supporting leg inside needn't be provided with drag chain, not only can reduce the overall weight of supporting leg, and can optimize the structure of supporting leg, makes the working strength that its structure is compact more and increase supporting leg.
In a kind of specific embodiment, expansion cylinder 2 can be telescopic oil cylinder, and correspondingly, shoring 3 also is an oil cylinder, and fluid is a hydraulic oil, and the cylinder body of telescopic oil cylinder connects said Convenient table, and the expansion link of said telescopic oil cylinder connects movable leg 11; And the telescopic outrigger device can also be provided with sequence valve, the first hydraulic fluid port communication of fluid passage 211 of sequence valve, and second hydraulic fluid port of sequence valve is communicated with the rodless cavity of shoring 3.
Being provided with of the response pressure of sequence valve can be launched required pressure fully according to telescopic outrigger and set; When telescopic outrigger extended assigned position, the external fluid pipeline continued in expansion cylinder 2, to fill hydraulic oil, when hydraulic oil reaches the response pressure of sequence valve; Sequence valve is opened; Hydraulic oil gets in the rodless cavity of shoring 3, and the expansion link that promotes shoring 3 moves downward, with car body jack-up.
Set sequence valve in the telescopic outrigger device, can guarantee that telescopic outrigger launches back shoring 3 fully and just begins action, increase the safe reliability of work.
The said sequence valve can also be one way sequence valve 5; Be that sequence valve and check valve are used; When shoring 3 support works; Hydraulic oil is through the rodless cavity of sequence valve entering shoring 3, and behind shoring 3 end-of-jobs, the hydraulic oil under the effect of elastic element in the shoring 3 flows back in the hydraulic tubing through check valve.
One way sequence valve 5 helps the smooth backflow of hydraulic oil in the shoring 3.
A kind of preferred embodiment in; Elastic element can be coil spring 4; According to the space and concrete usage condition of shoring 3, select the coil spring 4 of certain specification and type, coil spring 4 is set in the strut bar 32 of shoring 3; Coil spring 4 one ends connect the diapire of said shoring 3, and the other end connects the large end face of strut bar 32.
Coil spring 4 is arranged in the rod chamber; When coil spring 4 during at dilatation; Strut bar 32 can play good directional tagging to spring, helps the distortion at vertical direction of coil spring 4, run-off the straight when preventing coil spring 4 distortion; Avoid producing between itself and the casing wall friction and cause both to wear and tear, can improve the service life of coil spring 4 and shoring 3.And, coil spring 4 do not have need lubricate, anti-fouling is strong and the little characteristics of coil spring 4 quality own, can be so that increase the weight of supporting leg, and need not carry out maintenance in using to it, service life is long.
Reliable operation need to prove that elastic element also can be arranged in the rodless cavity of shoring 3, as long as can realize that the technique effect of this paper gets final product.
Elastic element can also be cylindrical helical spring, and its acquisition cost is lower; Elastic element can also be for becoming the conical coil spring of rigidity, and the stability of conical coil spring is than higher.
In a kind of more excellent embodiment, the telescopic outrigger device can also comprise change-over valve, and change-over valve can be hand change over valve, also can be electronic change-over valve, and the first hydraulic fluid port C of change-over valve connects first oil circuit, and its second hydraulic fluid port is communicated with the rod chamber of expansion cylinder 2; The 3rd hydraulic fluid port of change-over valve is normally closed hydraulic fluid port.
Change-over valve 6 can be realized connection, switching-over and the cut-out of hydraulic oil easily, and simple to operate.
A kind of preferred embodiment in; The telescopic outrigger device can also comprise multiple directional control valve 7; The oil inlet P of multiple directional control valve 7 is communicated with hydraulic oil source; The oil return inlet T of multiple directional control valve 7 is communicated with fuel tank, and the first hydraulic fluid port A of multiple directional control valve is communicated with the first hydraulic fluid port C of change-over valve, and the second hydraulic fluid port B of multiple directional control valve is communicated with the rodless cavity of said expansion cylinder 2.
Multiple directional control valve 7 can be realized connection, the switching-over of hydraulic oil easily, and simple to operate.
In above-mentioned each embodiment, the telescopic outrigger device can also comprise hydraulic lock 8, and hydraulic lock can be manual type, also can be electric-controlled type, and second hydraulic fluid port of multiple directional control valve is communicated with the rodless cavity of expansion cylinder 2 through hydraulic lock 8.
When functional fault appears in hydraulic efficiency pressure system and hydraulic actuating cylinder; Hydraulic lock 8 can be positioned expansion cylinder 2 and shoring 3 for residing control position rapidly reliably; And energy that need not be extra is supplied with, and has also guaranteed the safety of staff and equipment simultaneously, when hydraulic efficiency pressure system and the releasing of hydraulic actuating cylinder functional fault; When hydraulic oil source provided hydraulic pressure again, expansion cylinder 2 was resumed work with shoring 3.
Change-over valve among above-mentioned each embodiment can be solenoid directional control valve; Electromagnetic valve can pass through the change that getting of self is electric, outage realizes the oil circuit direction, helps realizing Automation of construction macninery control, the work efficiency of raising construction machinery and equipment.
The present invention also provides a kind of construction machinery and equipment, comprise power system and with said power system bonded assembly telescopic outrigger device, said telescopic outrigger device be more than the telescopic outrigger device of the construction machinery and equipment described in arbitrary embodiment.
This project machinery has above-mentioned telescopic outrigger device, because above-mentioned telescopic outrigger device has above-mentioned technique effect, the construction machinery and equipment with this telescopic outrigger device also should have the corresponding techniques effect.
The structure of above-mentioned other parts of construction machinery and equipment please refer to available data, does not do at this and gives unnecessary details.
More than a kind of telescopic outrigger device provided by the present invention and construction machinery and equipment have been carried out detailed introduction.Used concrete example among this paper principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.

Claims (9)

1. the telescopic outrigger device of a construction machinery and equipment; Comprise Convenient table and with said Convenient table through horizontal development cylinder bonded assembly movable leg; The end of said movable leg (11) is provided with shoring (3), it is characterized in that, the expansion link of said expansion cylinder (2) has the fluid passage; The rodless cavity of said shoring (3) is through the rodless cavity of said expansion cylinder (2) and the external fluid pipeline of the said Convenient table of said fluid passage (211) connection; And be provided with vertically flexible elastic element in the said shoring (3), an end of said elastic element connects the roof or the diapire of said shoring (3), and the other end connects the strut bar (32) of said shoring (3).
2. the telescopic outrigger device of construction machinery and equipment as claimed in claim 1 is characterized in that, said expansion cylinder is a telescopic oil cylinder, and the cylinder body of telescopic oil cylinder connects Convenient table, and the expansion link of telescopic oil cylinder connects movable leg (11); And said telescopic outrigger device also is provided with sequence valve, and first hydraulic fluid port of said sequence valve is communicated with said fluid passage (211), and second hydraulic fluid port of said sequence valve is communicated with the rodless cavity of said shoring (3).
3. the telescopic outrigger device of construction machinery and equipment as claimed in claim 2 is characterized in that, said sequence valve is one way sequence valve (5).
4. the telescopic outrigger device of construction machinery and equipment as claimed in claim 3; It is characterized in that; Said elastic element is coil spring (4); Said coil spring (4) is set in said strut bar (32), and said coil spring (4) one ends connect the diapire of said shoring (3), and the other end connects the large end face of said strut bar (32).
5. the telescopic outrigger device of construction machinery and equipment as claimed in claim 4 is characterized in that, also comprises change-over valve (6), and first hydraulic fluid port (C) of said change-over valve connects first oil circuit, and its second hydraulic fluid port is communicated with the rod chamber of said expansion cylinder; The 3rd hydraulic fluid port of said change-over valve (6) is normally closed hydraulic fluid port.
6. the telescopic outrigger device of construction machinery and equipment as claimed in claim 5; It is characterized in that; Also comprise multiple directional control valve (7), the oil inlet of said multiple directional control valve (7) is communicated with hydraulic oil source, and the return opening of said multiple directional control valve (7) is communicated with fuel tank; First hydraulic fluid port (A) of said multiple directional control valve (7) is communicated with said first oil circuit, and second hydraulic fluid port (B) of said multiple directional control valve (7) is communicated with the rodless cavity of said expansion cylinder (2).
7. the telescopic outrigger device of construction machinery and equipment as claimed in claim 6 is characterized in that, also comprises hydraulic lock (8), and second hydraulic fluid port of said multiple directional control valve (7) is communicated with the rodless cavity of said expansion cylinder through said hydraulic lock (8).
8. the telescopic outrigger device of construction machinery and equipment as claimed in claim 7 is characterized in that, said change-over valve (6) is a solenoid directional control valve.
9. construction machinery and equipment, comprise vehicle frame and with said vehicle frame bonded assembly telescopic outrigger device, it is characterized in that the telescopic outrigger device that said telescopic outrigger device is each described construction machinery and equipment of claim 1 to 8.
CN2011102315958A 2011-08-15 2011-08-15 Telescopic support leg device and engineering machinery CN102424036A (en)

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Application Number Priority Date Filing Date Title
CN2011102315958A CN102424036A (en) 2011-08-15 2011-08-15 Telescopic support leg device and engineering machinery

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102996553A (en) * 2012-11-27 2013-03-27 三一重工股份有限公司 Support leg hydraulic system and engineering machinery
CN103010976A (en) * 2012-12-17 2013-04-03 中联重科股份有限公司 Hydraulic system for controlling oil cylinder to stretch out and draw back in sequence, horizontal supporting leg system and engineering machinery
CN103587509A (en) * 2013-11-21 2014-02-19 三一汽车制造有限公司 Supporting leg and pump truck
CN104340888A (en) * 2014-10-28 2015-02-11 徐州重型机械有限公司 Supporting leg telescopic oil cylinder guiding device and crane
EP2947039A1 (en) * 2014-05-23 2015-11-25 EPSILON Kran GmbH. Side support for a crane
CN105858508A (en) * 2016-04-21 2016-08-17 北汽福田汽车股份有限公司 Landing leg telescoping mechanism and automobile crane with same
CN106402088A (en) * 2016-08-31 2017-02-15 河南卫特汽车起重机有限公司 Support oil circuit system
CN107161011A (en) * 2017-05-04 2017-09-15 宁波工程学院 The device of recyclable kinetic energy power generation during a kind of automobile brake traveling
CN108061076A (en) * 2017-11-15 2018-05-22 北京新立机械有限责任公司 A kind of hydraulic leg mechanical locking device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN86200921U (en) * 1986-01-23 1987-05-20 浦沅工程机械总厂 Telescopic leg hydraulic system for wheeled crane
JPH10265178A (en) * 1997-03-21 1998-10-06 Kobe Steel Ltd Outrigger device
CN201520281U (en) * 2009-11-26 2010-07-07 尹彦行 Automobile tyre lifting structure
CN201925264U (en) * 2010-12-01 2011-08-10 安徽星马汽车股份有限公司 Automatic locking device of horizontal hydraulic support leg of concrete pump truck

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN86200921U (en) * 1986-01-23 1987-05-20 浦沅工程机械总厂 Telescopic leg hydraulic system for wheeled crane
JPH10265178A (en) * 1997-03-21 1998-10-06 Kobe Steel Ltd Outrigger device
CN201520281U (en) * 2009-11-26 2010-07-07 尹彦行 Automobile tyre lifting structure
CN201925264U (en) * 2010-12-01 2011-08-10 安徽星马汽车股份有限公司 Automatic locking device of horizontal hydraulic support leg of concrete pump truck

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102996553A (en) * 2012-11-27 2013-03-27 三一重工股份有限公司 Support leg hydraulic system and engineering machinery
CN102996553B (en) * 2012-11-27 2015-06-10 三一重工股份有限公司 Support leg hydraulic system and engineering machinery
CN103010976A (en) * 2012-12-17 2013-04-03 中联重科股份有限公司 Hydraulic system for controlling oil cylinder to stretch out and draw back in sequence, horizontal supporting leg system and engineering machinery
CN103010976B (en) * 2012-12-17 2014-12-24 中联重科股份有限公司 Hydraulic system for controlling oil cylinder to stretch out and draw back in sequence, horizontal supporting leg system and engineering machinery
CN103587509A (en) * 2013-11-21 2014-02-19 三一汽车制造有限公司 Supporting leg and pump truck
CN103587509B (en) * 2013-11-21 2016-04-06 三一汽车制造有限公司 A kind of supporting leg and pump truck
EP2947039A1 (en) * 2014-05-23 2015-11-25 EPSILON Kran GmbH. Side support for a crane
CN104340888A (en) * 2014-10-28 2015-02-11 徐州重型机械有限公司 Supporting leg telescopic oil cylinder guiding device and crane
CN105858508A (en) * 2016-04-21 2016-08-17 北汽福田汽车股份有限公司 Landing leg telescoping mechanism and automobile crane with same
CN106402088A (en) * 2016-08-31 2017-02-15 河南卫特汽车起重机有限公司 Support oil circuit system
CN106402088B (en) * 2016-08-31 2017-12-08 河南卫华特种车辆有限公司 A kind of supporting leg oil piping system
CN107161011A (en) * 2017-05-04 2017-09-15 宁波工程学院 The device of recyclable kinetic energy power generation during a kind of automobile brake traveling
CN108061076A (en) * 2017-11-15 2018-05-22 北京新立机械有限责任公司 A kind of hydraulic leg mechanical locking device

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Application publication date: 20120425