US3734531A - Stabilizing device for appliances for public works, for handling and for maintenance - Google Patents

Stabilizing device for appliances for public works, for handling and for maintenance Download PDF

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Publication number
US3734531A
US3734531A US00188179A US3734531DA US3734531A US 3734531 A US3734531 A US 3734531A US 00188179 A US00188179 A US 00188179A US 3734531D A US3734531D A US 3734531DA US 3734531 A US3734531 A US 3734531A
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United States
Prior art keywords
jacks
chassis
traverse
legs
axis
Prior art date
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Expired - Lifetime
Application number
US00188179A
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English (en)
Inventor
R Metaillier
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Richier SA
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Richier SA
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Filing date
Publication date
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Publication of US3734531A publication Critical patent/US3734531A/en
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/72—Counterweights or supports for balancing lifting couples
    • B66C23/78—Supports, e.g. outriggers, for mobile cranes
    • B66C23/80—Supports, e.g. outriggers, for mobile cranes hydraulically actuated
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/08—Superstructures; Supports for superstructures
    • E02F9/085—Ground-engaging fitting for supporting the machines while working, e.g. outriggers, legs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/20—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members

Definitions

  • the invention relates to a stabilizing device for such appliances which comprises two pairs [30] Forelgn Apphcanon Pnonty Data of stabilizing legs driven by jacks and arranged at the Oct. 12, 1970 France ..7036753 from and at the rear, respectively, of the pp e- At least one of these pairs of legs is mounted on a [52] US. Cl. ..280/150.5 t a articulated, about an axis, to the chassis of [51] Int. Cl.
  • SHLET 2 [IF 2 STABILIZING DEVICE FOR APPLIANCES FOR PUBLIC WORKS, FOR HANDLING AND FOR MAINTENANCE
  • Mobile appliances for public works intended to lift big and variable loads, or for carrying out earthwork works, such as cranes, mechanical shovels, excavators, etc., are known which are provided with mobile spades or stabilizing carrying legs which can be brought to bear on the ground in order to increase the surface of the support polygon of the appliance during work.
  • the stabilizing legs or spades were articulated directly on the chassis of the appliance, their movements being controlled by hydraulic jacks.
  • a single distributor is used to feed simultaneously all the jacks driving the stabilizing legs.
  • the driver can put the appliance back onto four bearings by opening the distributor in order to re-feed the jacks with fluid under pressure.
  • the jack in which the pressure has decreased (owing to the fact that the corresponding leg is no longer bearing on the ground) is thus re-fed, and its piston shifts until the corresponding leg bears once more against the ground.
  • the present invention has the aim of supplying a new stabilizing device for appliances for public works, for handling or for maintenance, which allows the disadvantages described above to be obviated.
  • this device which comprises two pairs of stabilizing legs driven by doubleaction hydraulic jacks and arranged at the front and at the rear, respectively, of the appliance that is to be stabilized, is characterized in that at least one of these pairs of stabilizing legs is mounted on a traverse articulated, about an axis perpendicular to this traverse and parallel to the mean plane of the chassis of the appliance, to the chassis of the said appliance, the said articulated traverse being able to be immobilized about its axis, in relation to the chassis, by suitable means also allowing one to cause the traverse to pivot about its articulation axis in the case of cessation of bearing on the ground of one of the legs carried by the articulated traverse, so as to re-establish this bearing.
  • the articulated traverse can be immobilized in relation to the chassis by the means of two single-action jacks, pneumatic or hydraulic, arranged between the articulated traverse and the chassis on either side of the articulation axis of the traverse to the chassis, and the chambers of these jacks can be put into communication in order to bring about the pivoting of the traverse about its articulation axis when a pressure diflerence exists between the chambers of the two single-action jacks as a result of non-bearing on the ground of one of the stabilizing legs carried by the articulated traverse, so as to put the said leg into bearing on the ground once more.
  • FIG. 1 is a diagrammatic view in perspective showing an appliance chassis for public works, for handling or for maintenance, provided with a stabilizing device in accordance with the invention.
  • FIG. 2 is a diagram of the control circuits of this stabilizing device.
  • FIG. 1 Represented in FIG. 1 is the chassis of an appliance provided with a stabilizing device in accordance with the invention.
  • the chassis 1 of the appliance which carries a jib or an arm orientable (not shown) by rotation about a pivot 2 having a vertical axis arranged on the said chassis, are fixed traverses 3 and 4.
  • the traverse 3 is fixed rigidly to the front of the chassis whilst the traverse 4 is fixed in articulated manner, at the rear of the chassis, about an axis 5 perpendicular to the traverse 4 and parallel to the mean plane of the chassis.
  • each of the jacks 14 to 17 has its body fixed to the traverse on which the leg which it actuates is mounted, and has its rod articulated at its end to the top of the stabilizing leg associated therewith.
  • the clearances of the traverse 4 about the axis 5 are controlled by means of a pair of single-action hydraulic jacks l8 and 19. These jacks 18, 19 are arranged between the chassis 1 and the traverse 4, on either side of the axis 5.
  • wheels 20-23 on which the appliance moves when it is desired to change the position of the appliance are as shown. These wheels are relieved of load partially or totally when the stabilizing device is put into action.
  • control circuits of the stabilizing device of FIG. 1 comprise a hydraulic circuit and a pneumatic circuit.
  • the hydraulic circuit is fed from a service pump 30 supplying the necessary hydraulic pressure to the whole of the items of equipment of the appliance.
  • This pump which takes the oil from a reservoir 31 is protected against excessive pressures by a piloted safety valve 32 and feeds, through the conduit 33, the work equipment (not shown) of the appliance and, through the distributor 34, the four jacks 14 to 17 actuating the stabilizing legs.
  • the pneumatic circuit which is fed from a compressed air source 36, allows, on the one hand, the gates 54 and 55 controlling the putting into communication of the chambers 18a and 19a of the hydraulic jacks 18 and 19 to be actuated, and the traverse 4 to be locked in position about the axis 5, and, on the other hand, allows actuation of the shut-off valves 37 and 38 controlling the feed in hydraulic fluid of the chambers of the jacks 14 and 15 carried by the traverse 3, corresponding to the placing in bearing on the ground of the legs 10 and 11.
  • the chambers 18a and 19a of the jacks 18 and 19, the chamber 57b of the accumulator 56 and the conduit 62 are always filled with oil under pressure whose pressure depends on that prevailing in the chamber 57a of the accumulator 56, the minimum value being that supplied by the compressed air source 36.
  • the branchings 40a and 41a serve for the controlling of the valves 40 and 41, so as to allow the lifting of the legs 12 and 13. Moreover, as the shut-off valves 54 and 55 which control the placing in communication of the hydraulic jacks 18 and 19 are closed, the traverse finds itself locked in position in relation to the chassis upon the lowering of the legs 12 and 13.
  • the appliance finds itself in unstable equilibrium on only three legs, for example, as a result of a consolidation or subsidence of the ground, it is possible to put it into stable equilibrium once more without having to shift the appliance.
  • control disposition of the jacks 14 and 15, designated by the general reference A allows one to re-establish the bearing of the front legs without having recourse to the pump 30 which can thus continue to feed, without disturbance, the hydraulic work equipment of the appliance.
  • shut-off valves 54 and 55 being open, the chambers 18a and are thus in communication, and oil under pressure of the chamber 18a passes into the chamber 19a in which the pressure has decreased owing to the fact that the leg 13 was no longer in bearing on the ground.
  • This brings about the pivoting of the traverse 4 about the axis 5, in the direc tion of the arrow f (FIG. 1). This pivotingis continued until the leg 13 returns to bearing upon the ground and the pressures in the chambers 18a and 19a are equalized.
  • the accumulator 56 whose chamber 570 is put into communication, via the non-return valve 58, with the source 36 upon the opening of the shut-off valve 50, allows one to maintain a suitable pressure in the chambers 18a and 19a, thanks to the fluid under pressure contained in the chamber 57b which is separated from the chamber 57a by a membrane (compensation of the leakages and of differences in volumes).
  • shut-off valve 50 When the appliance is once more suitably in bearing on its four stabilizing legs, one re-closes the shut-off valve 50, which brings about the return of the piston 53a under the action of the return spring 53b and the closure of the shut-off valves 54 and 55. The traverse is thus immobilized in the position which it has assumed.
  • a valve 59 is provided in the conduit 52 so that the compressed air stored can escape when one recloses the shut-off valve 50.
  • control arrangement of the jacks 12 and 13, designated by the general reference B allows one to re-establish the bearing of one of the rear legs in all cases.
  • FIGS. 1 and 2 would be capable of receiving various modifications.
  • the traverse 3 could also be articulated to the chassis and immobilized by two jacks, like the traverse 4, instead of being fixed rigidly to the chassis.
  • the pairs of front and rear jacks could be driven each by an arrangement A or an arrangement B instead of being driven, respectively, by an arrangement A and an arrangement B.
  • said jacks connecting said chassis and said traverse being of the single action type each having a fluid-pressure chamber, and said device including means for interconnecting the fluid-pressure chambers of said last-mentioned jacks.
  • a device which further comprises means for connecting the fluid chambers of the jacks actuating the legs of at least one of said first mentioned pairs.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)
  • Vehicle Body Suspensions (AREA)
US00188179A 1970-10-12 1971-10-12 Stabilizing device for appliances for public works, for handling and for maintenance Expired - Lifetime US3734531A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7036753A FR2109307A5 (enrdf_load_stackoverflow) 1970-10-12 1970-10-12

Publications (1)

Publication Number Publication Date
US3734531A true US3734531A (en) 1973-05-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
US00188179A Expired - Lifetime US3734531A (en) 1970-10-12 1971-10-12 Stabilizing device for appliances for public works, for handling and for maintenance

Country Status (5)

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US (1) US3734531A (enrdf_load_stackoverflow)
DE (1) DE2149849B2 (enrdf_load_stackoverflow)
FR (1) FR2109307A5 (enrdf_load_stackoverflow)
GB (1) GB1346662A (enrdf_load_stackoverflow)
IT (1) IT939981B (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH688528A5 (de) * 1993-11-29 1997-10-31 Contraves Ag Lafette.
WO1999064685A1 (en) * 1998-06-12 1999-12-16 Webb Sterling E Dual mode stabilizer for loaders and attachments
US6443490B2 (en) 1998-06-12 2002-09-03 William E. Webb Dual mode stabilizer for backhoe loaders and backhoe attachments
WO2007024177A1 (en) * 2005-08-23 2007-03-01 Asr Traffic Ab A trailer-related supporting arrangement
US10308228B2 (en) * 2015-07-28 2019-06-04 Hoerbiger Automatisierungstechnik Holding Gmbh Land vehicle with a chassis and a plurality of corner support units attached thereto
WO2025065942A1 (zh) * 2023-09-25 2025-04-03 中联重科股份有限公司 用于控制底盘调平的方法、控制器及步履式挖掘机

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2625679C2 (de) * 1976-06-08 1981-08-27 Liebherr-Hydraulikbagger Gmbh, 7951 Kirchdorf Baumaschine, insbesondere Bagger
DE3310491A1 (de) * 1983-03-23 1984-10-04 O & K Orenstein & Koppel Ag, 1000 Berlin Abstuetzvorrichtung an kettenfahrzeugen
GB8308088D0 (en) * 1983-03-24 1983-05-05 Coles Cranes Ltd Mobile cranes
FR2701909B1 (fr) * 1993-02-25 1995-05-24 Sacmi Installation hydraulique de commande des stabilisateurs escamotables d'un engin mobile à châssis rigide.
FR2714743B1 (fr) * 1993-12-31 1996-02-23 Jeantil Sa Dispositif de régulation hydraulique de la rotation de deux arbres d'entraînement, notamment d'un fond mobile et d'un dispositif démêleur d'une désileuse ou analogue.
CN109882463B (zh) * 2019-03-28 2020-06-05 江苏德龙镍业有限公司 扒渣机液压同步倾翻装置
CN111169438B (zh) * 2020-01-20 2021-09-03 徐工集团工程机械股份有限公司 调平方法和可调平台

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3397898A (en) * 1967-02-06 1968-08-20 Caterpillar Tractor Co Stabilizer for motor vehicle
US3442530A (en) * 1966-03-22 1969-05-06 Gabriel L Guinot Method of operating extendable and retractable stabilising stays or props of public works vehicles and an hydraulic system for carrying out said method
US3603614A (en) * 1968-06-21 1971-09-07 Poclain Sa Means for stabilizing a civil engineering machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3442530A (en) * 1966-03-22 1969-05-06 Gabriel L Guinot Method of operating extendable and retractable stabilising stays or props of public works vehicles and an hydraulic system for carrying out said method
US3397898A (en) * 1967-02-06 1968-08-20 Caterpillar Tractor Co Stabilizer for motor vehicle
US3603614A (en) * 1968-06-21 1971-09-07 Poclain Sa Means for stabilizing a civil engineering machine

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH688528A5 (de) * 1993-11-29 1997-10-31 Contraves Ag Lafette.
WO1999064685A1 (en) * 1998-06-12 1999-12-16 Webb Sterling E Dual mode stabilizer for loaders and attachments
US6076855A (en) * 1998-06-12 2000-06-20 Webb; Sterling E. Dual mode stabilizer for backhoe loaders and backhoe attachments
US6443490B2 (en) 1998-06-12 2002-09-03 William E. Webb Dual mode stabilizer for backhoe loaders and backhoe attachments
WO2007024177A1 (en) * 2005-08-23 2007-03-01 Asr Traffic Ab A trailer-related supporting arrangement
US10308228B2 (en) * 2015-07-28 2019-06-04 Hoerbiger Automatisierungstechnik Holding Gmbh Land vehicle with a chassis and a plurality of corner support units attached thereto
WO2025065942A1 (zh) * 2023-09-25 2025-04-03 中联重科股份有限公司 用于控制底盘调平的方法、控制器及步履式挖掘机

Also Published As

Publication number Publication date
DE2149849B2 (de) 1975-05-28
IT939981B (it) 1973-02-10
FR2109307A5 (enrdf_load_stackoverflow) 1972-05-26
GB1346662A (en) 1974-02-13
DE2149849A1 (de) 1972-05-04

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