EP0097739B1 - Dispositif d'appui hydraulique - Google Patents

Dispositif d'appui hydraulique Download PDF

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Publication number
EP0097739B1
EP0097739B1 EP82200815A EP82200815A EP0097739B1 EP 0097739 B1 EP0097739 B1 EP 0097739B1 EP 82200815 A EP82200815 A EP 82200815A EP 82200815 A EP82200815 A EP 82200815A EP 0097739 B1 EP0097739 B1 EP 0097739B1
Authority
EP
European Patent Office
Prior art keywords
piston rod
brake
piston
cylinder
rod side
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
EP82200815A
Other languages
German (de)
English (en)
Other versions
EP0097739A1 (fr
Inventor
Raimund. Dipl.-Ing. Leber
Heinz Ing. Grad. Stegelmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hydro-Geratebau & Co KG Hebezeuge GmbH
Original Assignee
Hydro-Geratebau & Co KG Hebezeuge GmbH
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 Hydro-Geratebau & Co KG Hebezeuge GmbH filed Critical Hydro-Geratebau & Co KG Hebezeuge GmbH
Priority to AT82200815T priority Critical patent/ATE20486T1/de
Priority to EP82200815A priority patent/EP0097739B1/fr
Priority to DE8282200815T priority patent/DE3271763D1/de
Priority to DE19828218955U priority patent/DE8218955U1/de
Publication of EP0097739A1 publication Critical patent/EP0097739A1/fr
Application granted granted Critical
Publication of EP0097739B1 publication Critical patent/EP0097739B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A23/00—Gun mountings, e.g. on vehicles; Disposition of guns on vehicles
    • F41A23/50—Travelling locks; Brakes for holding the gun platform in a fixed position during transport
    • 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
    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/26—Locking mechanisms
    • F15B15/262—Locking mechanisms using friction, e.g. brake pads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
    • F41A23/00—Gun mountings, e.g. on vehicles; Disposition of guns on vehicles
    • F41A23/56—Arrangements for adjusting the gun platform in the vertical or horizontal position

Definitions

  • the invention relates to a hydraulic support device according to the preamble of claim 1.
  • a supporting device of the type mentioned above is already known from FR-A-1 131 204.
  • the unlocking piston forms the end of the piston rod-side cylinder space on the piston rod side; if work equipment is inserted there to retract the piston rod, it practically exerts pressure on the unlocking piston and on the working piston at the same time, even if the braking device has not yet or not yet completely detached from the piston rod. This results in unfavorable force relationships in the braking device.
  • a safety device for elevators, lifting platforms and the like which are hydraulically liftable with the aid of piston rods is also known.
  • a braking device blocking the retracting movement of the piston rod without pressure medium supply to the piston rod-side cylinder space is also provided (DE-A-2333491).
  • brake shoes are provided as brake members, which can also be pressed onto the piston rod by means of inclined surfaces and spring force, these brake shoes being releasable via individual hydraulic pistons, which are supplied via a hydraulic pressure line which is provided by a further pressure line which is separate for the actuation of the working piston, however is related to this.
  • the hydraulic working medium acts on the pistons for releasing the braking device at the earliest at the point in time at which the working piston is acted on; the additional hydraulic control line leading to the pistons of the braking device is also cumbersome and prone to failure.
  • the object is therefore to create a hydraulic support device of the type mentioned at the outset, in which the mechanical braking device is released in a simple manner before the hydraulic working medium acts on the piston surface on the rod side.
  • the unlocking piston has an axial collar which completely or partially blocks an annular inflow opening between the annular chamber and the piston rod-side cylinder space in the blocking position and releases it in the unlocking position. Accordingly, the unlocking piston acts simultaneously in the manner of a valve; if it is acted upon and moved by a hydraulic working fluid, it immediately releases the mechanical brake elements and it opens or increases the working fluid overflow cross-section to the cylinder chamber on the piston rod side.
  • the brake housing has a stop shoulder, which limits the axial displacement of the unlocking piston in a position that releases the brake shoes. This measure determines the opening position of the unlocking piston and the pressure energy of the working fluid can then only be used to retract the piston rod.
  • a piston rod 2 is arranged, at the lower end of which a support leg 3 is articulated.
  • a cover 5 is attached to the head end.
  • the associated working piston 4 (hereinafter also referred to as “piston 4” for short) separates a piston-side cylinder chamber 7 connected to a pressure line 6 from a cylinder chamber 9 on the piston rod side, which is connected to a pressure line 8.
  • Both pressure lines 6, 8 form channels provided in the cylinder housing, which have 1 connection openings approximately halfway up the cylinder.
  • a connection plate 10 attached to the chassis of a vehicle serves both to fasten the cylinder 1 and to connect supply lines 12 and 13 for the hydraulic working fluid.
  • a cylindrical brake housing 14 is attached, for. B. screwed by means of a sleeve.
  • the piston rod 2 is behind by a base plate 15 of this brake housing 14. led out below from the support device.
  • a plurality of brake members 16 are designed in the form of segments, the inner surfaces of which have friction surfaces 17, while the outer surfaces are conically tapered upwards and interact with an oblique guide surface 18 in the brake housing 14.
  • Each brake shoe 16 has a spring 19 which is supported on the base plate 15 and presses the associated brake shoe 16 upwards against the inclined guide surface 18.
  • the brake shoes 16 are pressed with their friction surfaces 17 against the jacket of the piston rod 2, which is mechanically blocked in this way by an axial displacement by friction.
  • the spring force of the springs 19 is selected so that the frictional engagement is also sufficient to hold the retracted piston rod 2 in the retracted position when the hydraulic system is depressurized.
  • the piston-side cylinder chamber 7 is acted upon by hydraulic working fluid.
  • the pressure force acts downwards, with the brake shoes 16 are moved by the piston rod 2 against the force of the springs 19 and the frictional engagement is released.
  • An unlocking piston 20 is arranged above the brake shoes 16 and is axially displaceably mounted on the piston rod 2 and in the brake housing 14, sealing rings and conventional wiper rings being provided with respect to both components.
  • the unlocking piston 20 has an annular extension 21 on its circumference, which projects into an annular chamber 22 of the brake housing 14. This annular chamber 22 connects the cylinder chamber 9 on the piston rod side to the associated pressure line 8.
  • an axially oriented collar 23 is provided at the upper end of the unlocking piston 20 and engages like a valve in an annular inflow opening 24 of the cylinder chamber 9 on the piston rod side.
  • the hydraulic line is applied to the pressure line 8 assigned to the cylinder chamber 9 on the piston rod side. Since the inflow opening 24 is completely or partially closed by the collar 23, the pressure acts on the unlocking piston 20 or on its annular extension 21, so that the unlocking piston 20 moves downward against the brake shoes 16, which thereby lose their frictional engagement with the piston rod . If the unlocking piston 20 is in the unlocked position and the brake shoes 16 are accordingly released, the inflow opening 24 is also free, so that the pressure of the working medium acts on the piston rod side on the piston 4 and the piston rod 2 retracts. If the pressure of the working medium is released, the springs 19 press the brake shoes 16 into their blocking position, the unlocking piston 20 also being returned to its upper starting position.
  • a stop shoulder 25 is provided on the brake housing 14 at a height such that the collar 23 of the unlocking piston 20 opens the annular inflow opening 24 in the stop position.
  • the braking device 16 to 20 is otherwise designed so that the forces acting on the extended support device increase the effect of the frictional engagement caused by the springs 19.
  • Support devices according to the invention are used, for example, in vehicles, in particular in self-propelled guns.
  • the hydraulic support devices according to the invention offer the advantage that their piston rods are mechanically blocked in an extended position solely by the mechanical braking device 16 to 20, which not only avoids an undesirable pressure load on the hydraulic system due to high recoil forces or the like, but rather the impact forces occurring with self-propelled guns are also conducted directly into the ground.
  • the support device also has a compact structure and special hydraulic control lines for timely release of the mechanical braking device are avoided.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Braking Arrangements (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Claims (2)

1. Dispositif d'appui hydraulique comportant un cylindre hydraulique de travail à double effet (1) muni d'une tige de piston unilatérale (2) se terminant par un pied d'appui (3), le cylindre de travail présentant un dispositif de freinage (16 à 20) bloquant le mouvement de rétraction de la tige de piston sans amenée d'agent de pression à la cavité de cylindre (9) située du côté de la tige de piston, dispositif qui présente un carter de frein (14) disposé à l'extrémité du cylindre (1) située du côté de la tige de piston, muni de surfaces de guidage obliques (18) qui amènent des organes de freinage (16) sollicités par ressort à s'appliquer contre la tige de piston (2), un piston de déverrouillage (20) qui entoure la tige de piston (2) étant prévu, pour desserrer ce dispositif de freinage, dans une chambre annulaire (22) reliant la cavité de cylindre (9) située du côté de la tige de piston au tuyau de pression (8), le piston de déverrouillage desserrant les organes de freinage (16) contre la force de ressort lorsqu'il est soumis à la pression, caractérisé en ce que le piston de déverrouillage (20) présente un collet axial (23) qui bouche complètement ou partiellement dans la position de blocage une ouverture annulaire d'afflux (24) entre la chambre annulaire (22) et la cavité de cylindre située du côté de la tige de piston et la libère dans -la position de déverrouillage.
2. Dispositif selon la revendication 1, caractérisé en ce que le carter de frein (14) présente un épaulement de butée (25) qui limite le coulissement axial du piston de déverrouillage (20) dans une position desserrant les mâchoires de frein (16).
EP82200815A 1982-06-30 1982-06-30 Dispositif d'appui hydraulique Expired EP0097739B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT82200815T ATE20486T1 (de) 1982-06-30 1982-06-30 Hydraulische abstuetzvorrichtung.
EP82200815A EP0097739B1 (fr) 1982-06-30 1982-06-30 Dispositif d'appui hydraulique
DE8282200815T DE3271763D1 (en) 1982-06-30 1982-06-30 Hydraulic support arrangements
DE19828218955U DE8218955U1 (de) 1982-06-30 1982-07-02 Hydraulische abstuetzvorrichtung fuer fahrzeuge, insbesondere selbstfahrlafetten

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP82200815A EP0097739B1 (fr) 1982-06-30 1982-06-30 Dispositif d'appui hydraulique

Publications (2)

Publication Number Publication Date
EP0097739A1 EP0097739A1 (fr) 1984-01-11
EP0097739B1 true EP0097739B1 (fr) 1986-06-18

Family

ID=8189502

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82200815A Expired EP0097739B1 (fr) 1982-06-30 1982-06-30 Dispositif d'appui hydraulique

Country Status (3)

Country Link
EP (1) EP0097739B1 (fr)
AT (1) ATE20486T1 (fr)
DE (2) DE3271763D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104154814A (zh) * 2014-05-19 2014-11-19 北京航天发射技术研究所 具有自锁功能的拉绳式自动锁筒机构

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3521298A1 (de) * 1985-06-13 1986-12-18 Applied Power, Inc., Milwaukee, Wis. Klemmeinrichtung
DE3811225C2 (de) * 1988-04-02 1996-07-11 Sitema Hydraulische Stützvorrichtung für Fahrzeuge
DE3900344A1 (de) * 1989-01-07 1990-07-12 Montan Hydraulik Gmbh & Co Kg Einstufiger zylinder mit kolbenstangen-klemmvorrichtung
AT387U1 (de) * 1994-07-01 1995-09-25 Palfinger Ag Hydraulisch aus- und einfahrbare stuetze fuer ein mit einem ladekran versehenes lastfahrzeug
US20020031230A1 (en) * 2000-08-15 2002-03-14 Sweet William B. Method and apparatus for a web-based application service model for security management
CN102678664A (zh) * 2012-05-31 2012-09-19 齐齐哈尔轨道交通装备有限责任公司 液压支撑油缸及起重机
CN104843432B (zh) * 2015-04-30 2017-04-26 北京航天发射技术研究所 传力导向装置
CN106744371A (zh) * 2016-12-13 2017-05-31 刘国彬 一种带二级同步水平伸缩支腿的汽车起重机
CN110439875B (zh) * 2019-06-28 2020-12-25 武汉船用机械有限责任公司 用于控制负载的液压油缸
DK3926105T3 (da) * 2020-06-18 2023-02-13 Hiab Ab Stabilisatorbenarrangement og mobil arbejdsmaskine omfattende et sådant stabilisatorbenarrangement

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE943574C (de) * 1954-07-17 1956-05-24 Walter Ruf Panzerwagen mit einzeln bedienbaren, verlaenger- und verkuerzbaren Stuetzen
FR1131204A (fr) * 1955-09-08 1957-02-19 Meudon Forges Atel Cylindre à fluide comprimé à dispositif de sécurité
DE1751159A1 (de) * 1968-04-13 1971-04-22 Rudolf Geiger Praez S Dreh Und Pneumatische Lineareinheit
US3662649A (en) * 1970-03-23 1972-05-16 Us Army Self-locking hydraulic linkage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104154814A (zh) * 2014-05-19 2014-11-19 北京航天发射技术研究所 具有自锁功能的拉绳式自动锁筒机构
CN104154814B (zh) * 2014-05-19 2016-06-29 北京航天发射技术研究所 具有自锁功能的拉绳式自动锁筒机构

Also Published As

Publication number Publication date
DE3271763D1 (en) 1986-07-24
EP0097739A1 (fr) 1984-01-11
DE8218955U1 (de) 1982-10-14
ATE20486T1 (de) 1986-07-15

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