DE3263635D1 - End-of-stroke cushioning device for a piston of a double-acting cylinder - Google Patents

End-of-stroke cushioning device for a piston of a double-acting cylinder

Info

Publication number
DE3263635D1
DE3263635D1 DE8282101329T DE3263635T DE3263635D1 DE 3263635 D1 DE3263635 D1 DE 3263635D1 DE 8282101329 T DE8282101329 T DE 8282101329T DE 3263635 T DE3263635 T DE 3263635T DE 3263635 D1 DE3263635 D1 DE 3263635D1
Authority
DE
Germany
Prior art keywords
pressure
return valve
medium
piston
stroke
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
DE8282101329T
Other languages
German (de)
Inventor
Axel Kemner
Helmut Gottling
Rolf Heise
Werner Dannenberg
Hans-Jurgen Pfeifer
Wolf-Dietrich Kamke
Walter Ortmann
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.)
Aventics GmbH
Original Assignee
Wabco Westinghouse Steuerungstechnik and Co 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 Wabco Westinghouse Steuerungstechnik and Co GmbH filed Critical Wabco Westinghouse Steuerungstechnik and Co GmbH
Priority to DE8282101329T priority Critical patent/DE3263635D1/en
Application granted granted Critical
Publication of DE3263635D1 publication Critical patent/DE3263635D1/en
Expired legal-status Critical Current

Links

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
    • F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
    • F15B15/225—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke with valve stems operated by contact with the piston end face or with the cylinder wall
    • 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
    • F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke

Abstract

1. Device for braking the final part of the stroke of the working piston (21) of a double-action working cylinder, which piston is provided with a piston rod (1, 36), having the following features : a) one of the pressure-medium chambers (19) of the working cylinder is connected via a non-return valve (15, 14) to the associated pressure-medium connection (13) for the input and output of the pressure medium, the non-return valve (15, 14) being arranged in such a manner that it can be brought into the open position in the direction towards the pressure-medium chamber (19) ; b) the pressure-medium chamber (19) is additionally connected directly to the pressure-medium connection (13) via a bore (8) provided with a restriction (6) ; c) the non-return valve (15, 14) is arranged and designed in such a manner that, when the pressure medium is output from the pressure-medium chamber (19), initially the non-return valve (14, 15) is opened and, after a predetermined position of the working cylinder (21) has been reached, before the end of the stroke, the non-return valve (14, 15) is closed in order that the pressure medium displaced by the working piston (21) can initially flow substantially unhindered out through the open non-return valve (15, 14) and has to pass through the restriction (6) when the non-return valve is closed ; characterised by the following features : d) the valve-closing member (15) of the non-return valve (15, 14) is loaded in the closing direction by a spring (18) ; e) with the valve-closing member (15) is associated a permanent magnet (17) which cooperates with a structural unit (1, 36), which is associated with the working piston (21) and has different magnetic properties in the axial direction, in such a manner that, during the stroke, initially the spring-loaded valve-closing member (15) is held open by the magnetic force and the magnetic force is relieved as soon as the working piston (21) reaches the predetermined position before the end of the stroke.
DE8282101329T 1981-03-16 1982-02-22 End-of-stroke cushioning device for a piston of a double-acting cylinder Expired DE3263635D1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE8282101329T DE3263635D1 (en) 1981-03-16 1982-02-22 End-of-stroke cushioning device for a piston of a double-acting cylinder

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813110132 DE3110132A1 (en) 1981-03-16 1981-03-16 DEVICE FOR STOPPING THE WORKING PISTON OF A DOUBLE-ACTING WORK CYLINDER
DE8282101329T DE3263635D1 (en) 1981-03-16 1982-02-22 End-of-stroke cushioning device for a piston of a double-acting cylinder

Publications (1)

Publication Number Publication Date
DE3263635D1 true DE3263635D1 (en) 1985-06-13

Family

ID=6127433

Family Applications (2)

Application Number Title Priority Date Filing Date
DE19813110132 Withdrawn DE3110132A1 (en) 1981-03-16 1981-03-16 DEVICE FOR STOPPING THE WORKING PISTON OF A DOUBLE-ACTING WORK CYLINDER
DE8282101329T Expired DE3263635D1 (en) 1981-03-16 1982-02-22 End-of-stroke cushioning device for a piston of a double-acting cylinder

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE19813110132 Withdrawn DE3110132A1 (en) 1981-03-16 1981-03-16 DEVICE FOR STOPPING THE WORKING PISTON OF A DOUBLE-ACTING WORK CYLINDER

Country Status (4)

Country Link
EP (1) EP0060412B1 (en)
AT (1) ATE13215T1 (en)
DE (2) DE3110132A1 (en)
ES (1) ES510432A0 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4400483C2 (en) * 1994-01-11 1996-12-19 Invest Tech Ag Linear drive cylinder
GB9501117D0 (en) * 1995-01-20 1995-03-08 Norgren Martonair Gmbh Fluid-powered cylinder
TW451031B (en) * 1999-10-01 2001-08-21 Smc Corp Linear actuator with air buffer mechanism
US6633015B2 (en) * 2000-12-08 2003-10-14 Doben Limited Soft-touch pneumatic drive unit
US8065930B2 (en) * 2008-03-26 2011-11-29 GM Global Technology Operations LLC Hydraulic actuator for transmissions having reduced noise
GB0810391D0 (en) * 2008-06-06 2008-07-09 Isentropic Ltd Fluid servo and applications

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7122330U (en) * 1971-09-09 Gebr Felss Working cylinder with hydraulic or pneumatic actuation
US2464962A (en) * 1945-09-27 1949-03-22 Westinghouse Air Brake Co Fluid pressure motor
DE1239948B (en) * 1959-06-30 1967-05-03 Stothert & Pitt Ltd Double-acting pressure cylinder activated by pressure medium
US3157095A (en) * 1962-04-12 1964-11-17 Elmer F Heiser Piston and cylinder device
DE1961838U (en) * 1966-10-14 1967-06-08 Realpa A G CHECK VALVE.
DE1601770A1 (en) * 1967-02-14 1970-03-19 Westinghouse Air Brake Co Double-acting, pressure fluid controlled cylinder
DE1601749A1 (en) * 1968-01-15 1970-05-21 Hermann Post Hydraulic or pneumatic working cylinder
GB1278762A (en) * 1970-01-15 1972-06-21 Martonair Ltd Magnetically-operable device
DE2334413A1 (en) * 1973-07-06 1975-01-30 Wabco Westinghouse Gmbh PNEUMATIC ACTUATOR
FR2410756A1 (en) * 1977-11-30 1979-06-29 Outillage Air Comprime STARTING DEVICE FOR A CUSHIONED PISTON CYLINDER
DE2908583A1 (en) * 1979-03-05 1980-09-18 Wabco Fahrzeugbremsen Gmbh DEVICE FOR STOPPING THE WORKING PISTON OF A DOUBLE-ACTING WORK CYLINDER
DE2949250A1 (en) * 1979-12-07 1981-06-11 Wabco Steuerungstechnik GmbH & Co, 3000 Hannover ACTUATING DEVICE FOR A DIRECTIONAL VALVE

Also Published As

Publication number Publication date
EP0060412A1 (en) 1982-09-22
ES8303626A1 (en) 1983-02-01
ES510432A0 (en) 1983-02-01
DE3110132A1 (en) 1982-09-23
EP0060412B1 (en) 1985-05-08
ATE13215T1 (en) 1985-05-15

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Legal Events

Date Code Title Description
8327 Change in the person/name/address of the patent owner

Owner name: MANNESMANN REXROTH PNEUMATIK GMBH, 3000 HANNOVER,

8339 Ceased/non-payment of the annual fee