EP0103555B1 - Verriegelungsvorrichtung für einen Kolben - Google Patents

Verriegelungsvorrichtung für einen Kolben Download PDF

Info

Publication number
EP0103555B1
EP0103555B1 EP83850217A EP83850217A EP0103555B1 EP 0103555 B1 EP0103555 B1 EP 0103555B1 EP 83850217 A EP83850217 A EP 83850217A EP 83850217 A EP83850217 A EP 83850217A EP 0103555 B1 EP0103555 B1 EP 0103555B1
Authority
EP
European Patent Office
Prior art keywords
piston
cylinder
wedge means
piston rod
contact surface
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
EP83850217A
Other languages
English (en)
French (fr)
Other versions
EP0103555A1 (de
Inventor
Per-Ulf Andersson
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.)
Atlas Copco AB
Original Assignee
Atlas Copco AB
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 Atlas Copco AB filed Critical Atlas Copco AB
Publication of EP0103555A1 publication Critical patent/EP0103555A1/de
Application granted granted Critical
Publication of EP0103555B1 publication Critical patent/EP0103555B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • 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

Definitions

  • This invention relates to a pressure fluid actuated piston-cylinder device, comprising a cylinder, a piston rod connected to the piston and extending out of the cylinder through one of the cylinder end walls, and a releasable locking mechanism disposed in said cylinder end wall and including a first wedge means frictionally engageable with the piston rod, a second wedge means axially movable and engageable with said first wedge means, a spring means continuously biassing said second wedge means into engagement with said first wedge means thereby accomplishing a piston rod locking action, and a fluid actuated release piston sealingly guided in a cylinder chamber selectively supplied with pressure fluid and arranged to move said second wedge means in a direction opposite to the direction of the biassing force of said spring means so as to neutralize said biassing force and discontinue said piston rod locking action.
  • Piston-cylinder devices of the above type find use in applications where safety demands are high as regards avoidance of uncontrolled piston movements at, for instance, hose breakage.
  • a piston cylinder device having a built-in piston locking mechanism it is also possible to stop and lock the piston and piston rod in predetermined positions.
  • conical piston rod engaging friction ring is encircled by an annular activation member which is spring biassed in its friction ring engaging direction and selectively acted upon by pressure fluid in the opposite direction for releasing the piston rod. Accordingly, safety demands are satisfied in that the piston is always locked unless pressure fluid is supplied to release it.
  • the main object of the invention is to accomplish a piston cyclinder device in which the locking means will generate a powerful enough locking action and in which the locking means does not cause increased outer dimensions of the piston cylinder device.
  • the piston-cylinder device shown in the drawing figures comprises a cylinder 10, a piston (not shown) sealingly guided in the cylinder and a piston rod 11 which extends out of the cylinder 10 through the end wall 13 of the cylinder 10.
  • the cylinder end wall 13 comprises an outer section 14 and an inner section 15.
  • a piston rod clamping unit 17 comprises three conical piston rod 11 engaging friction segments 18, an axially displaceable wedge ring 19 surrounding the friction segments 18, and a spring means 20.
  • the latter which consists of a number of Belleville-type spring washers, acts between the outer cylinder end wall section 14 and the wedge ring 19, thereby biassing the latter in the friction segment engaging direction.
  • Each of the friction segments are provided with a lining 21 for improved frictional engagement with the piston rod 11. Between the segments 18 there are radial clearances 22 for making sure that the radial grip on the piston rod 11 is not jeopardized by contact between the friction segments themselves.
  • the wedge ring 19 is locked against rotation by means of two axially extending keys 23 mounted diametrically opposite each other in the end wall section 14.
  • Wire inserts 24 are located in axial grooves in the cooperating conical surfaces of the friction segments 18 and the wedge ring 19 in order to prevent the segments to rotate and also to prevent the piston rod 11 from being rotated when locked.
  • annular space 26 Between the cylinder end wall sections 14, 15 there is an annular space 26 in which three equally spaced levers 27 are supported. Each of these levers 27 is guided in a radial recess 28 in the inner cylinder wall section 15.
  • a ring piston 29 is sealingly guided in an annular chamber 30 in the inner end wall section 15.
  • the annular chamber 30 is selectively supplied with pressure fluid through a passage 31.
  • the piston 29 is intended to counteract and neutralize the force developed by the Belleville springs 20 and to move the annular wedge ring 19 off the segments 18, thereby relaxing the clamping unit 17 and permitting movement of the piston rod 11.
  • Each of the ievers 27 has a first contact surface 33 engaging two immovable fulcrum forming rings 34, 35, a second contact surface 36 facing the same direction as the first contact surface 33 for engaging the ring piston 29, and a third contact surface 37 located right in between the first and second contact surfaces 33, 36 and facing the opposite direction.
  • the third contact surface 37 abuts against the wedge ring 19. Due to the lever arrangement, the movement of piston 29 is transferred to the wedge ring 19 at half the speed but twice the power. This means that a fairly small release piston may be used to neutralize a strong activation spring 20.
  • Fig 1 the locking mechanism is shown in its released position. Pressure fluid is suplied to chamber 30 via passage 31, and the piston 29 has moved to its left hand position. The piston movement has been transferred to the annular wedge ring 19 by the levers 27. The force developed by the piston 29 is amplified by 100% by the levers 27.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)

Claims (6)

1. Druckmittelbetätigte Kolben -Zylinder -Einrichtung, bestehend aus einem Zylinder (10), einer mit dem Kolben verbundenen und sich aus dem Zylinder (10) durch eine der Zylinderendwände (13) heraus erstreckende Kolbenstange (11) und einer in der genannten Endwand (13) angeordneten lösbaren Verriegelungsvorrichtung mit einem ersten Keilglied (18) für den reibschlüssigen Eingriff mit der Kolbenstange (11), einem axial beweglichen zweiten Keilglied (19) für den Eingriff mit dem ersten Keilglied (18), einem das zweite Keilglied (19) ständig in Eingriff mit dem ersten Keilglied (18) vorspannenden und dadurch die Verriegelung der Kolbenstange herbeiführenden Federmittel (20) und einem druckmittelbetätigten Entriegelungskolben (29), der dichtend in einer selektiv mit Druckmittel versorgbaren Zylinderkammer (30) geführt ist und dazu dient, daß zweite Keilglied (19) in einer Richtung entgegengesetzt zur Richtung der Vorspannkraft des Federmittels (20) zu bewegen, derart, daß die Vorspannkraft aufgehoben und die Verriegelung der Kolbenstange unterbrochen wird, gekennzeichnet durch eine Anzahl kraftverstärkender Hebel (27), welche dazu dienen, den Entriegelungskolben (29) und das zweite Keilglied (19) miteinander zu verbinden.
2. Kolben -Zylinder -Einrichtung nach Anspruch 1, worin der Entriegelungskolben (29) ringförmig ausgebildet und dichtend in einer ringförmigen Zylinderkammer (30) geführt ist, welche in der Endwand (13) des Zylinders (10) angeordnet ist und die Kolbenstange (11) konzentrisch umschließt.
3. Kolben -Zylinder -Einrichtung nach Anspruch 1 oder 2, worin ein jeder der kraftverstärkenden Hebel (27) an einem Ende eine erste Berührungsfläche (33) für den Eingriff mit einem an der Zylinderendwand (13) festen Drehpunkt-Abstützmittel (34,35), eine am entgegengesetzten Ende des Hebels (27) angeordnete zweite Berührungsfläche (36) zum Eingriff mit dem Entriegelungskolben (29) und eine zwischen der ersten Berührungsfläche (33) und der zweiten Berührungsfläche (36) gelegene dritte Berührungsfläche (37) für den Eingriff des zweiten Keilglieds (19) aufweist.
4. Kolben -Zylinder -Einrichtung nach Anspruch 3, worin die Hebel (27) drei an der Zahl sind und sich radial im Verhältnis zur geometrischen Achse der Kolbenstange (11) erstecken.
5. Kolben -Zylinder -Einrichtung nach Anspruch 3 oder 4, worin die genannte dritte Berührungsfläche (37) in im wesentlichen gleichen Abständen von der ersten und der zweiten Berührungsfläche (33, 36) angeordnet ist.
6. Kolben -Zylinder -Einrichtung nach einem der Ansprüche 1 bis 5, worin das erste Keilglied (18) aus einer Anzahl von Segmenten besteht, während das zweite Keilglied (19) aus einem diese Segmente (18) umschließenden konischen Ringelement besteht.
EP83850217A 1982-08-20 1983-08-19 Verriegelungsvorrichtung für einen Kolben Expired EP0103555B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8204775 1982-08-20
SE8204775A SE441468B (sv) 1982-08-20 1982-08-20 Losbar lasningsanordning for en tryckmediemanovrerad kolvcylinder

Publications (2)

Publication Number Publication Date
EP0103555A1 EP0103555A1 (de) 1984-03-21
EP0103555B1 true EP0103555B1 (de) 1986-02-26

Family

ID=20347575

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83850217A Expired EP0103555B1 (de) 1982-08-20 1983-08-19 Verriegelungsvorrichtung für einen Kolben

Country Status (3)

Country Link
EP (1) EP0103555B1 (de)
DE (1) DE3362306D1 (de)
SE (1) SE441468B (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104088850A (zh) * 2014-07-06 2014-10-08 上海宏信设备工程有限公司 组合式斜锥自锁液压油缸
CN104500501A (zh) * 2014-12-05 2015-04-08 四川凌峰航空液压机械有限公司 液压浮动卡环锁
CN106050803A (zh) * 2016-07-29 2016-10-26 泸州合成液压件有限公司 一种锁紧油缸
CN106438573A (zh) * 2016-06-30 2017-02-22 泸州长信液压机械制造有限公司 锥套式机械锁紧油缸

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3510643A1 (de) * 1985-03-23 1986-09-25 Sitema Gesellschaft für Sicherheitstechnik und Maschinenbau mbH, 7500 Karlsruhe Klemmkopf
US4733602A (en) * 1986-03-17 1988-03-29 Wabco Ltd. Hydraulic brake actuator with parking brake
DE4126897A1 (de) * 1991-08-14 1993-02-18 Rexroth Mannesmann Gmbh Hydraulisches klemmsystem
ATA183292A (de) * 1992-09-15 1996-06-15 Hoerbiger Ventilwerke Ag Hydraulikzylinder
AT404168B (de) * 1993-10-07 1998-09-25 Hoerbiger Gmbh Hydraulikzylinder
IT1285239B1 (it) * 1996-02-14 1998-06-03 Danilo Baruffaldi Dispositivo di bloccaggio dello scorrimento dello stelo di un attuatore lineare, ed attuatore lineare munito di tale dispositivo
SE521461C2 (sv) * 1999-03-26 2003-11-04 Parker Hannifin Ab Kolv- cylinderanordning med kolvstångslåsning
IT1319967B1 (it) * 2000-03-16 2003-11-12 Ready S R L Dispositivo e gruppo per il bloccaggio di un attuatore lineare, edattuatore comprendente tale dispositivo.
DE20119153U1 (de) * 2001-11-26 2002-02-14 Polman Eckhard Elektromotor
DE10350225A1 (de) 2003-10-27 2005-05-19 Sitema Gmbh & Co. Kg Feststellvorrichtung
US20070081909A1 (en) * 2005-05-27 2007-04-12 Dalton William H Hydraulic lock for axial motion output device
DE102006004659A1 (de) 2006-01-31 2007-08-02 Sitema Gmbh & Co. Kg Klemmvorrichtung
DE102011112946B4 (de) * 2011-09-13 2015-03-26 Hema Maschinen- Und Apparateschutz Gmbh Kraftverstärkung für Klemm- bzw. Bremssysteme
CN104791327B (zh) * 2015-04-02 2017-01-11 中航飞机股份有限公司西安飞机分公司 一种用于钢球锁结构的应急开锁装置
EP3203090A1 (de) * 2016-02-04 2017-08-09 Tetra Laval Holdings & Finance S.A. Sperreinheit
CN106855072A (zh) * 2017-02-21 2017-06-16 泉州市海恩德机电科技发展有限公司 液压径向锁紧装置
CN113202838B (zh) * 2021-05-31 2024-01-23 徐工集团工程机械股份有限公司道路机械分公司 一种分体式机械锁定油缸
CN113883124B (zh) * 2021-09-30 2022-06-21 四川大学 一种用于高温高压环境模拟舱的底部油缸
CN116441954B (zh) * 2023-06-16 2023-08-15 中机生产力促进中心有限公司 低速重载直线运动锁紧系统及锁紧操作方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2755456A1 (de) * 1977-12-13 1979-06-28 Bosch Gmbh Robert Arbeitszylinder

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR761703A (fr) * 1933-10-05 1934-03-26 élévateur hydro-pneumatique
CA1109366A (en) * 1977-10-21 1981-09-22 Andrew Stratienko Locking device for hydraulic actuator
DE7931576U1 (de) * 1979-11-08 1981-06-25 P-H-matic Ges. für pneumatische und hydraulische Antriebe und Steuerungen mbH, 8000 München Bremseinrichtung für kolbenstangenlose Arbeitszylinder

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2755456A1 (de) * 1977-12-13 1979-06-28 Bosch Gmbh Robert Arbeitszylinder

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104088850A (zh) * 2014-07-06 2014-10-08 上海宏信设备工程有限公司 组合式斜锥自锁液压油缸
CN104500501A (zh) * 2014-12-05 2015-04-08 四川凌峰航空液压机械有限公司 液压浮动卡环锁
CN104500501B (zh) * 2014-12-05 2017-01-25 四川凌峰航空液压机械有限公司 液压浮动卡环锁
CN106438573A (zh) * 2016-06-30 2017-02-22 泸州长信液压机械制造有限公司 锥套式机械锁紧油缸
CN106438573B (zh) * 2016-06-30 2018-11-20 泸州长信液压机械制造有限公司 锥套式机械锁紧油缸
CN106050803A (zh) * 2016-07-29 2016-10-26 泸州合成液压件有限公司 一种锁紧油缸

Also Published As

Publication number Publication date
DE3362306D1 (en) 1986-04-03
SE441468B (sv) 1985-10-07
SE8204775D0 (sv) 1982-08-20
EP0103555A1 (de) 1984-03-21
SE8204775L (sv) 1984-02-21

Similar Documents

Publication Publication Date Title
EP0103555B1 (de) Verriegelungsvorrichtung für einen Kolben
US4185539A (en) Locking device for hydraulic actuator
US3277983A (en) Compensating brake structure
US3994205A (en) Device for discontinuing and automatically restoring the operational function of a spring brake actuator
US4577732A (en) Brake apparatus to retard relative movement between two members
US3542165A (en) Automatic wear-compensation device for brakes of all types
JPH03129134A (ja) 制動兼締付け装置
US4678065A (en) Brake actuator
US3903999A (en) Extensible brake adjuster and reset apparatus
US3586138A (en) Hydraulically operated lock mechanisms
US4335808A (en) Multiple biscuit clutch or brake
US4088205A (en) Brake cylinder with built-in slack adjuster, including means for manually resetting piston travel
US2957354A (en) Mechanical actuating device
KR20040090495A (ko) 힘 증폭기
CA1109366A (en) Locking device for hydraulic actuator
GB2168758A (en) Manual release means for a brake
US3608334A (en) Device for limiting torque
US4535875A (en) Actuator for an internal shoe drum brake
GB2026632A (en) Brake wear adjusters
EP0016566B1 (de) Mit Federkraft beaufschlagte Betätigungsglieder
AU2018329423B2 (en) A safety brake for an elevator
US4474273A (en) Movement limiting device for a plant under pressure
JPS5980537A (ja) 間隙自己調整ブレーキ
US3334713A (en) Automatic brake adjuster
US3972269A (en) Brake cylinder for vehicles

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): CH DE FR GB IT LI

17P Request for examination filed

Effective date: 19840816

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ATLAS COPCO AKTIEBOLAG

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO ROMA S.P.A.

AK Designated contracting states

Designated state(s): CH DE FR GB IT LI

REF Corresponds to:

Ref document number: 3362306

Country of ref document: DE

Date of ref document: 19860403

ET Fr: translation filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19890819

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19890831

Ref country code: CH

Effective date: 19890831

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19900427

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19900501

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed