EP0463349A1 - Vérin de travail - Google Patents

Vérin de travail Download PDF

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Publication number
EP0463349A1
EP0463349A1 EP19910107995 EP91107995A EP0463349A1 EP 0463349 A1 EP0463349 A1 EP 0463349A1 EP 19910107995 EP19910107995 EP 19910107995 EP 91107995 A EP91107995 A EP 91107995A EP 0463349 A1 EP0463349 A1 EP 0463349A1
Authority
EP
European Patent Office
Prior art keywords
working
sensor
chamber
working cylinder
cylinder according
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.)
Granted
Application number
EP19910107995
Other languages
German (de)
English (en)
Other versions
EP0463349B1 (fr
Inventor
Manfred Siebold
Norbert Dipl.-Ing. Schneider (Fh)
Friedbert Roether
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0463349A1 publication Critical patent/EP0463349A1/fr
Application granted granted Critical
Publication of EP0463349B1 publication Critical patent/EP0463349B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F15B15/28—Means for indicating the position, e.g. end of stroke

Definitions

  • the invention relates to a cylinder according to the preamble of the main claim.
  • a cylinder is known (DE-AS 11 48 451).
  • These working cylinders have the advantage that the position of the working piston movable in the working cylinder can be recognized at any time.
  • electrical detection means such as limit switches or the like.
  • Working cylinders of this type have recently also been used in connection with electronic switching devices, and they are provided on vehicles in which, for example, they act as actuators for electrically controlled clutches of vehicle engines.
  • a working cylinder equipped in this way is then also "capable of wading" because access to the snorkel with its opening can be raised so that no water is sucked into the breathing chamber when crossing water courses.
  • the working cylinder mentioned at the outset, with the characterizing features of the main claim, has the advantage that no special means are required to guide the breathing air.
  • FIG. 1 shows a working cylinder with a sensor, both in section and
  • FIG. 2 shows the sensor on an enlarged scale, also in section.
  • a working cylinder 1 has a housing 2, which consists of a largely smooth-walled cylinder piece 3 and a connector 4 and a cover 5 and 6 each for the cylinder piece and connector.
  • the cover 5 intended for the cylinder piece 3 has a central hole through which one end of a piston rod 7 projects in a sealed manner to the outside.
  • the piston rod 7 has a recess 8 for receiving a push rod 9 with which to actuate a clutch, not shown, i.e. is to move in and out.
  • the piston rod 7 carries on its other side a working piston 10 which separates a working chamber 11 from a breathing chamber 12 facing the cover 5 in the working cylinder 1.
  • the piston rod 7 is extended through the working chamber 11 by means of a hollow cylindrical immersion body 13 which is provided with an axial channel 13 'and which is fastened to the piston rod 7 by means of a snap ring 14 and sealing ring 15.
  • the immersion body 13 is delimited at one end by a radial channel 30 which opens into the breathing chamber 12.
  • an axial passage 31 is provided for an outside air connection (cf. FIG. 2).
  • the immersion body 13 is made of aluminum material and - as can best be seen in FIG. 2 - is overlapped by a plastic coil body 16 which carries the windings of a coil 17 which is surrounded by a shielding sleeve 18 made of ferritic material.
  • Immersion body 13, bobbin 16 with coil 17 and shielding sleeve 18 form a sensor 13, 16, 17, 18, the shielding sleeve 18 is mounted in a partition 19 and carries on its side facing the working piston 10 a sleeve seal 21 fixed by means of a snap ring 20, which the outer surface of the immersion body 13 can slide.
  • the connections 24 and 25 are connected to electronics 32, which in turn are connected in an electrically conductive manner to a central plug 26 which is fastened to the cover 6.
  • the partition 19 accommodates two solenoid valves in an axially parallel arrangement, a ventilation solenoid valve 27 and a ventilation solenoid valve 28 which enter the control unit chamber 22
  • the ventilation solenoid valve 27 is connected to a compressed air source 33 and the ventilation solenoid valve 28 and the control unit chamber are connected to an outside air point 29.
  • the working cylinder 1 is intended for actuating a clutch, which is fully engaged in the drawn position of the working piston 10.
  • the ventilation solenoid valve 27 is switched over to release the clutch. Compressed air flows into the working chamber 11 and the working piston 10 moves to the left.
  • the breathing chamber 12 reduces its volume, and the breathing air flows through the axial channel 13 'of the immersion body 13 via the cover 6 to the outside air, or - as described later - is only pumped around via the axial channel 13' of the immersion body 13.
  • the ventilation solenoid valve 27 is switched off and the ventilation solenoid valve 28 is switched on.
  • the working chamber 11 is vented.
  • the springs provided in the clutch which are tensioned when the clutch is released, now press the working piston 10 to the right in the direction of the starting position via the push rod 9.
  • the breathing chamber 12 Since the breathing chamber 12 enlarges in the process, compressed air is drawn into the breathing chamber 12 from the working chamber 11 or outside air.
  • the breathing chamber 12 either breathes to or from the outside air or it breathes to or from the working chamber 11, but the path of the breathing air always leads through the axial channel 13 'of the hollow sensor 13, 16, 17, 18.
  • the breathing air, which the control devices Chamber 22 and the hollow sensor 13, 16, 17, 18 flows through, can also cool the sensor.
  • the working piston 10 again reaches its right end position, in which the clutch is fully engaged.
  • the hollow cylindrical sensor 13, 16, 17, 18 works as a position sensor for the working piston 10 by measuring the distance traveled by the working piston. For this purpose, an alternating current is applied to the coil 17, so that when the immersion depth of the immersion body 13 changes, a corresponding electrical signal is obtained which is evaluated in an electrical switching device. In this way, different engagement speeds can then be achieved in addition to the displacement measurement.
  • solenoid valves can be used instead of the two solenoid valves 27 and 28.
  • the working piston 10 can thus be positioned exactly with the aid of the hollow cylindrical position sensor 13, 16, 17, 18.
  • the four solenoid valves are controlled directly by the electronics. Two solenoid valves are used to release the clutch and to engage the clutch, with the two solenoid valves being followed by orifices with different diameters. Different engagement speeds of the clutch can then be realized by frequency and / or pulse width modulated control of the solenoid valves.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
  • Actuator (AREA)
EP91107995A 1990-06-27 1991-05-17 Vérin de travail Expired - Lifetime EP0463349B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4020368 1990-06-27
DE4020368A DE4020368A1 (de) 1990-06-27 1990-06-27 Arbeitszylinder

Publications (2)

Publication Number Publication Date
EP0463349A1 true EP0463349A1 (fr) 1992-01-02
EP0463349B1 EP0463349B1 (fr) 1993-04-28

Family

ID=6409121

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91107995A Expired - Lifetime EP0463349B1 (fr) 1990-06-27 1991-05-17 Vérin de travail

Country Status (5)

Country Link
US (1) US5123330A (fr)
EP (1) EP0463349B1 (fr)
JP (1) JP3160008B2 (fr)
DE (2) DE4020368A1 (fr)
HU (1) HU206536B (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59004242D1 (de) * 1989-12-02 1994-02-24 Teves Gmbh Alfred Bremskraftverstärker für bremssysteme mit antiblockier- und/oder antriebsschlupfregelung.
DE4202422A1 (de) * 1992-01-29 1993-08-05 Bosch Gmbh Robert Arbeitszylinder mit einem arbeitskolben
DE4405914B4 (de) * 1994-02-24 2012-03-22 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Pneumatischer Arbeitszylinder zum Betätigen einer Kupplung
US6874405B2 (en) * 2003-01-14 2005-04-05 Haldex Brake Corporation Breather filter for sealed spring brake actuators
ITAR20030013U1 (it) * 2003-06-12 2003-09-10 Faist Componenti S P A Attuatore pneumatico con rilevatore di posizione elettrico
US20080000733A1 (en) * 2006-06-14 2008-01-03 Ehrlich Rodney P Spring brake internal venting
CN102352896B (zh) * 2011-09-21 2013-03-27 东风汽车有限公司 一种机械式自动变速器的离合器执行机构
CN103671618A (zh) * 2012-09-21 2014-03-26 贵州红林机械有限公司 一种用于汽车自动变速器的离合器执行器总成
CN102889321A (zh) * 2012-10-09 2013-01-23 索特传动设备有限公司 一种离合器执行机构及车辆
US20150078926A1 (en) * 2013-09-17 2015-03-19 David A. Krug Regenerative hydraulic lift system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3116333A1 (de) * 1981-04-24 1982-11-18 H. Kuhnke Gmbh Kg, 2427 Malente Messsystem zum beruehrungslosen erfassen von positionen der kolbenstange einer kolben-zylinder-einheit
FR2596819A1 (fr) * 1986-04-08 1987-10-09 Samson Ag Dispositif pneumatique d'entrainement pour appareils de reglage ou analogues
DE3614300A1 (de) * 1986-04-26 1987-10-29 Bochumer Eisen Heintzmann Wegmesswertgeber

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2742916A (en) * 1952-07-31 1956-04-24 Honeywell Regulator Co Measuring and controlling apparatus
AT312319B (de) * 1967-12-30 1973-12-27 Joseph Anton Bachmann Vorrichtung zur Stellwegmessung bei einer Kolben-Zylinder-Einheit von Werkzeugmaschinen od.dgl.
US3659499A (en) * 1968-12-04 1972-05-02 Ford Motor Co Vacuum motor adapted for use in a vehicle speed control mechanism
SE355516B (fr) * 1970-12-28 1973-04-30 Kaufeldt Ingenjors Ab R
FR2220699B1 (fr) * 1973-03-09 1978-03-10 Commissariat Energie Atomique
DE2430394C3 (de) * 1974-06-25 1978-08-31 Knorr-Bremse Gmbh, 8000 Muenchen Vorrichtung zur Entlüftung des eine Rückhol- oder eine Speicherfeder aufnehmenden Sekundärraumes eines Bremszylinders
US4259895A (en) * 1979-06-11 1981-04-07 Owens Roland G Vacuum motor
JPS6213204U (fr) * 1985-07-10 1987-01-27
DE3734547A1 (de) * 1987-10-13 1989-05-03 Festo Kg Kolben-zylinder-aggregat

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3116333A1 (de) * 1981-04-24 1982-11-18 H. Kuhnke Gmbh Kg, 2427 Malente Messsystem zum beruehrungslosen erfassen von positionen der kolbenstange einer kolben-zylinder-einheit
FR2596819A1 (fr) * 1986-04-08 1987-10-09 Samson Ag Dispositif pneumatique d'entrainement pour appareils de reglage ou analogues
DE3614300A1 (de) * 1986-04-26 1987-10-29 Bochumer Eisen Heintzmann Wegmesswertgeber

Also Published As

Publication number Publication date
JP3160008B2 (ja) 2001-04-23
HU206536B (en) 1992-11-30
EP0463349B1 (fr) 1993-04-28
US5123330A (en) 1992-06-23
HUT59469A (en) 1992-05-28
HU912142D0 (en) 1991-12-30
DE59100096D1 (de) 1993-06-03
DE4020368A1 (de) 1992-01-02
JPH04231707A (ja) 1992-08-20

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