EP0124727B1 - Cylindre de travail - Google Patents

Cylindre de travail Download PDF

Info

Publication number
EP0124727B1
EP0124727B1 EP84102818A EP84102818A EP0124727B1 EP 0124727 B1 EP0124727 B1 EP 0124727B1 EP 84102818 A EP84102818 A EP 84102818A EP 84102818 A EP84102818 A EP 84102818A EP 0124727 B1 EP0124727 B1 EP 0124727B1
Authority
EP
European Patent Office
Prior art keywords
piston rod
cylinder
rod
piston
cylinder tube
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
EP84102818A
Other languages
German (de)
English (en)
Other versions
EP0124727A3 (en
EP0124727A2 (fr
Inventor
Erich Dipl.-Ing. Kleinknecht
Richard Pinter
Diether Dipl.-Ing. Slowak
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 EP0124727A2 publication Critical patent/EP0124727A2/fr
Publication of EP0124727A3 publication Critical patent/EP0124727A3/de
Application granted granted Critical
Publication of EP0124727B1 publication Critical patent/EP0124727B1/fr
Expired 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
    • F15B15/26—Locking mechanisms
    • F15B15/262—Locking mechanisms using friction, e.g. brake pads
    • 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
    • F15B15/02—Mechanical layout characterised by the means for converting the movement of the fluid-actuated element into movement of the finally-operated member
    • 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
    • F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • F15B15/2846—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using detection of markings, e.g. markings on the piston rod
    • 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
    • F15B15/2815—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT
    • F15B15/2861—Position sensing, i.e. means for continuous measurement of position, e.g. LVDT using magnetic means

Definitions

  • the invention is based on a working cylinder according to the preamble of main claim 1.
  • the braking device in the known working cylinder it is achieved that the piston rod can be braked to a certain extent exactly in a certain position.
  • the braking device receives a signal in the form of a pneumatic or hydraulic pressure, whereupon the piston rod is braked by a piston actuating an eccentric disk.
  • the piston rod can be rotated by the eccentric due to the braking process, which is often undesirable.
  • FIG. 1 shows a side view of a working cylinder, partly in section
  • FIG. 2 shows a top view of the working cylinder
  • FIG. 3 shows a section along III-III according to FIG. 2.
  • 10 denotes a cylinder tube which is closed on both sides by covers 11, 12 and via which the cylinder tube is clamped to the covers with the aid of four clamping screws 13.
  • An opening 14, 15 for supplying and discharging the pressure medium for actuating the piston or the piston rod is formed in each of the covers 11 and 12.
  • two through bores 16, 17 are formed in the cover 12, in which rods 18, 18 'are slidably guided and are connected at their end facing away from the cover 11 by a yoke 19.
  • the rod 18 is encoded, e.g. in that rings 20 made of a material with magnetic properties are inserted at certain intervals, which differ significantly from the magnetic properties of the material of the rod 18.
  • thread-like grooves can also be provided, which are filled with a similar material, or a band of magnetized material can also be inserted into the rod 18.
  • the piston rod is designated 25.
  • An eccentric ring 26 is slidably rotatably mounted on it, which is also supported in a bore 27 of the cover 12.
  • the eccentric 26 has an upstanding bolt 28 which engages in a slot 29 of a piston 30 which is slidably guided in a bore 31 of the braking device.
  • the piston 30 is acted upon by a valve 32 through a bore 32 and a line, not shown, with pressure medium. Contrary to the pressure medium pressure force acts on the piston 30 a compression spring 34 which is supported on a spring abutment 35 which is housed in a side part 36 of the braking device.
  • Such a braking device is known from DE-A-2515 566.
  • the compression spring 34 brings the piston 30 into such a position that the bolt 28 rotates the eccentric 26 so that it clamps the piston rod 25.
  • the electronics actuate the valve 23 in such a way that pressure medium flows through the bore 32 into the bore 31.
  • the piston 30 moves to the left, the pin 28 is pivoted counterclockwise in such a way that the eccentric ring 26 releases the piston rod.
  • the piston and piston rod now move. If this has reached a certain position, which is identified by the coding on the rod 18, the electronics 22 emits a signal to the valve 23, which now immediately stops the pressure medium flow to the bore 32. Now the compression spring 34 brings the braking device back into the braking position, the piston rod is immediately tightened.
  • the piston rod can be moved to any position and clamped there.
  • a compensating coupling 39 is provided between the yoke 19 and the piston rod 25 so that no rotation of the yoke 19 with the guide rods 18, 18 ′ is possible due to the eccentric movement acting on the piston rod 25.
  • This consists essentially of a cylindrical body 40 which is screwed onto the piston rod 25 by means of a screw bolt 41 and a nut 42 arranged at its end.
  • the cylindrical body 40 has a transverse slot 45, into which a disk 43 is inserted with a bolt 44 which extends toward the yoke and which is screwed to the yoke by means of a screw 46 arranged therein.
  • the cylindrical body 40 is thus firmly connected on the one hand to the piston rod 25, and on the other hand via the disk 43 and the bolt 44 with little axial and radial play with the yoke 19.

Landscapes

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

Claims (4)

1. Cylindre de travail avec un piston sollicité par la pression et guidé dans un tube de cylindre (10), avec une tige de piston (25) et avec un dispositif de freinage (24) pour la tige de piston (25), dispositif prévu dans un montage à l'extrémité du tube de cylindre (10), cylindre de travail caractérisé par la combinaison des caractéristiques suivantes:
a) sur une partie de boîtier (12) disposée sur le tube de cylindre (10), est montée, de façon à pouvoir glisser au moins une tige de guidage (18, 18') s'étendant parallèlement au tube de cylindre et qui est solidaire de la tige de piston (25)
b) sur la tige de guidage (18) est disposé un moyen de codage (20) d'un type quelconque, s'étendant en direction longitudinale de cette tige, et destiné à un détecteur électrique de course (21 ) pour la position de la tige de piston,
c) la tige de guidage (18) est reliée à la tige de piston (25) avec un jeu axial et radial réduit par l'intermédiaire d'un couplage de compensation (39), pour soustraire les tiges de guidage (18, 18') à l'influence du déplacement du dispositif de freinage (24) sur la tige de piston (25).
2. Cylindre de travail selon la revendication 1, caractérisé en ce que sur le cylindre, ou bien sur une partie de boîtier (11, 12) associée au cylindre (10, sont disposées des tiges de guidage (18, 18') pour la tige de piston (25), ces tiges s'étendant des deux côtés et parallèlement au tube de cylindre, et ces deux tiges de guidage étant reliées par une traverse (19) qui est ellemême reliée à l'accouplement de compensation (39).
3. Cylindre de travail selon la revendication 1 et/ou la revendication 2, caractérisé en ce que le détecteur de course (21 ) fait partie d'une commande électronique (22) à laquelle est associée une soupape de commande (23) par l'intermédiaire de laquelle est commandée l'alimentation en fluide sous pression pour le dispositif de freinage (24).
4. Cylindre de travail selon la revendication 2, caractérisé en ce que l'accouplement de compensation (39) est constitué d'une structure cylindrique vissée sur la tige de piston (25) et dans laquelle est ménagée une fente transversale (42, 45) recevant un disque (43) avec un goujon (44), ce disque étant vissé en même temps que le goujon sur la traverse (19) au moyen d'une vis (46).
EP84102818A 1983-04-06 1984-03-15 Cylindre de travail Expired EP0124727B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8310037 1983-04-06
DE8310037U 1983-04-06

Publications (3)

Publication Number Publication Date
EP0124727A2 EP0124727A2 (fr) 1984-11-14
EP0124727A3 EP0124727A3 (en) 1985-07-24
EP0124727B1 true EP0124727B1 (fr) 1987-06-03

Family

ID=6751949

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84102818A Expired EP0124727B1 (fr) 1983-04-06 1984-03-15 Cylindre de travail

Country Status (3)

Country Link
EP (1) EP0124727B1 (fr)
JP (1) JPS59172802U (fr)
DE (1) DE3464084D1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60263713A (ja) * 1984-06-11 1985-12-27 Takashi Kimura 減速装置付中間停止空気圧シリンダ
FR2588328B1 (fr) * 1985-10-04 1989-07-21 Schrader Verin a arret en tout point
JPH0419214Y2 (fr) * 1986-01-21 1992-04-30
US4756229A (en) * 1986-09-25 1988-07-12 United Technologies Corporation Digital motor feedback for a position actuator
DE8703310U1 (de) * 1987-03-05 1988-06-30 Robert Bosch Gmbh, 7000 Stuttgart Arbeitszylinder
JP2662817B2 (ja) * 1989-08-03 1997-10-15 明男 松井 シリンダ停止装置
DE29509582U1 (de) * 1995-06-12 1995-08-24 Afag AG für automatische Fertigungstechnik, Aarberg Linearmodul
EP2199624B1 (fr) * 2008-12-17 2012-06-06 FESTO AG & Co. KG Actionneur linéaire fluidique avec unité de guidage
JP7063435B2 (ja) * 2019-07-04 2022-05-09 Smc株式会社 センサ取付具及び流体圧シリンダ

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1751404A1 (de) * 1968-05-24 1971-09-09 Juergens Walter Hydraulikzylinder
FR1596551A (fr) * 1968-07-31 1970-06-22
US3665812A (en) * 1969-07-01 1972-05-30 Chukyo Electric Co Apparatus for controlling rectilinear motion
DE2515566A1 (de) * 1975-04-10 1976-10-21 Gatermann Ingenieurbuero Gmbh Bremse fuer einen zylindrischen koerper
CH600171A5 (fr) * 1975-04-10 1978-06-15 Gatermann B Ingenieurbuero Gmb
US4214795A (en) * 1977-11-25 1980-07-29 Shoketsu Kinzoku Kogyo Kabushiki Kaisha Piston braking device for hydraulic or pneumatic cylinders
JPS56106209U (fr) * 1980-01-16 1981-08-18

Also Published As

Publication number Publication date
DE3464084D1 (en) 1987-07-09
EP0124727A3 (en) 1985-07-24
JPS59172802U (ja) 1984-11-19
JPH0219604Y2 (fr) 1990-05-30
EP0124727A2 (fr) 1984-11-14

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