WO1990003523A1 - Dispositif d'amortissement de fin de course - Google Patents

Dispositif d'amortissement de fin de course Download PDF

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Publication number
WO1990003523A1
WO1990003523A1 PCT/EP1989/001086 EP8901086W WO9003523A1 WO 1990003523 A1 WO1990003523 A1 WO 1990003523A1 EP 8901086 W EP8901086 W EP 8901086W WO 9003523 A1 WO9003523 A1 WO 9003523A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
end position
damping device
position damping
counterpressure
Prior art date
Application number
PCT/EP1989/001086
Other languages
German (de)
English (en)
Inventor
Karl-Fritz Heinzelmann
Original Assignee
Zahnradfabrik Friedrichshafen Ag
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 Zahnradfabrik Friedrichshafen Ag filed Critical Zahnradfabrik Friedrichshafen Ag
Publication of WO1990003523A1 publication Critical patent/WO1990003523A1/fr

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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
    • F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke

Definitions

  • the invention relates to an end position damping device for a piston according to the preamble of claim 1.
  • the ventilation in the area of the end position is limited by a constant throttle or an adjustable valve.
  • the throttle cross-section can be automatically aligned ** * 'by setting the preload pressure.
  • End position damping device does its job, but it requires a relatively high manufacturing effort.
  • Piston-cylinder unit required, for example for actuating the clutch of a group transmission, the arrangement of the annular back pressure chamber is not affected by the piston rod.
  • the damping effect can be varied as desired by designing the counter-pressure chamber or chambers with throttle bores or a throttle gap or by means of seals, which can be arranged both in the piston and in the cylinder base, without high expenditure in production being associated therewith.
  • 1 is a piston cylinder unit for actuating a clutch
  • a piston 1 is arranged in a cylinder 2, which is acted upon by, for example, compressed air and the shift rocker 41 adjusted by a group transmission 4 of a multi-speed change gear W in two end positions, via notches 31, 32 on the
  • Piston rod / shift rod 3 this and thus the shift rocker 41 of the group transmission 4 is held in the two end positions by a spring device 33.
  • Seals 12, 13 are arranged in the piston skirt 11 toward the cylinder wall 21.
  • the piston rod 3 is also sealed with respect to the housing 42 - seal 34.
  • the holding rocker 41 engages in a recess 35, which is pivotally mounted in the housing 42 of the group transmission 4 and a sliding sleeve 43 hidden by the switching rocker 41 a double clutch 44 moves.
  • the piston 1 is shown in this Fig. 1 in the left end position without end position damping device.
  • the piston 10 connected to the piston rod / shift rod 3 and arranged in the housing / cylinder 20 has 14 annular recesses 15 on the end face, which are so far radially inside that the seals 12, 13 for sealing the chambers 22, 23 radially lie outside of it and are not affected by the increased pressure in the counter-pressure chambers 25.
  • the counter-pressure chambers 25 are formed for damping the stop in both end positions 16, 17 of the piston 10 by an annular recess 15 in the piston 10 and by a ring 6, which cooperates with a recess 15 and is arranged and attached to the cylinder base 24.
  • the ring 6 can only be attached or centered via a recess 26.
  • the formation of the counter-pressure chamber 25 can also take place through the reverse arrangement of the ring 6 and the recess 15 - Ring arranged or molded on the piston and screwing in i cylinder base. Both chambers 22, 23 each have at least one connection 27, 28 for supplying the pressure medium or for venting.
  • the piston rod 3 is centered in the piston 10 and fastened by a screw 36 in the manner shown.
  • the switching device 5, 50 with the end position damping device according to FIG. 2 acts as follows: When switching, for example, air is pressed into the chamber 23 via the connection 28, so that the piston 10 from the position shown in FIG. 2 - left end position 17 - is pressed into the right end position 16, the chamber 22 being vented. So that the entire frontal surface comes into effect from the beginning, 6 channels or bores 64 can be arranged in the ring, so that the inner part 23a of the chamber 23, which is closed by the ring in the end position 17, is connected to the connection 28 is.
  • a seal 63 can also be arranged in the ring 6 but also in the recess 15.
  • Throttle bore 61 or throttle gap can be arranged on the ring 6 as well as in FIG. 2A through a gap 18 on the piston 100.
  • the chamber 23 is vented and the Chamber 22 supplied with pressure medium via the connection 27, the damping takes place in the end position 17 of the piston 10 in the same manner as already described.
  • the formation of an annular back pressure chamber 25 according to FIG. 2 is a particularly advantageous embodiment of the invention, because both the fastening of the shift or piston rod 3 and its sealing on the piston 10 radially on the inside and the seals 12, 13 on the piston 10 arranged radially on the outside are not be affected.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

Dans un dispositif d'amortissement de fin de course pour un piston (10) agencé dans un carter/cylindre (20) dans un dispositif de commutation fonctionnant surtout à l'air comprimé, le fluide moteur sert également à amortir la butée de fin de course. Les faces frontales (14) du piston (10) et les fonds de cylindres qui leur font face (24) sont conçus de telle manière qu'ils forment au moins une chambre de contre-pression (25) située à proximité de la fin de course correspondante (16, 17) du piston (10) et qui amortit la butée du piston (10). La chambre de contre-pression est située radialement à l'intérieur par rapport à la paroi du cylindre (21) de sorte que les joints (12, 13) du piston (10) ne sont pas affectés par la forte contre-pression. Chaque chambre de pression (25) est de préférence formée par une gorge (15) agencée dans le piston (10) et par un anneau (6) situé sur le fond du cylindre (24).
PCT/EP1989/001086 1988-09-23 1989-09-19 Dispositif d'amortissement de fin de course WO1990003523A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3832335 1988-09-23
DEP3832335.4 1988-09-23

Publications (1)

Publication Number Publication Date
WO1990003523A1 true WO1990003523A1 (fr) 1990-04-05

Family

ID=6363551

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1989/001086 WO1990003523A1 (fr) 1988-09-23 1989-09-19 Dispositif d'amortissement de fin de course

Country Status (1)

Country Link
WO (1) WO1990003523A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10006721A1 (de) * 2000-02-15 2001-08-16 Schaeffler Waelzlager Ohg Schaltvorrichtung eines Wechselgetriebes mit Dämpfungselement und Schaltwegbegrenzung
US7121538B2 (en) 2001-05-31 2006-10-17 Stromsholmen Ab Arrangement at a press tool for breaking the piston/piston rod of a gas spring
DE19604516B4 (de) * 1996-02-08 2007-03-01 Zf Friedrichshafen Ag Pneumatische Schalteinrichtung
EP2290263A2 (fr) 2009-08-31 2011-03-02 ZF Friedrichshafen AG Procédé de synchronisation, servomoteur et dispositif de couplage doté d'un servomoteur

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB955939A (en) * 1962-11-02 1964-04-22 Erickson Tool Co Hydraulic cylinder with adjustable cushioning means
US3185043A (en) * 1962-02-13 1965-05-25 Ansel W Dunham Cylinder arrangement

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3185043A (en) * 1962-02-13 1965-05-25 Ansel W Dunham Cylinder arrangement
GB955939A (en) * 1962-11-02 1964-04-22 Erickson Tool Co Hydraulic cylinder with adjustable cushioning means

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19604516B4 (de) * 1996-02-08 2007-03-01 Zf Friedrichshafen Ag Pneumatische Schalteinrichtung
DE10006721A1 (de) * 2000-02-15 2001-08-16 Schaeffler Waelzlager Ohg Schaltvorrichtung eines Wechselgetriebes mit Dämpfungselement und Schaltwegbegrenzung
EP1126198A1 (fr) 2000-02-15 2001-08-22 INA Wälzlager Schaeffler oHG Dispositif de changement de vitesses pour les boítes de vitesses avec élément d'amortissement et butée de mouvement de sélection
US6658959B2 (en) 2000-02-15 2003-12-09 Ina Schaeffler Kg Shifting device for a speed change gearbox, with a damping component and a shift path limit
US7121538B2 (en) 2001-05-31 2006-10-17 Stromsholmen Ab Arrangement at a press tool for breaking the piston/piston rod of a gas spring
EP2290263A2 (fr) 2009-08-31 2011-03-02 ZF Friedrichshafen AG Procédé de synchronisation, servomoteur et dispositif de couplage doté d'un servomoteur
DE102009029038A1 (de) 2009-08-31 2011-03-03 Zf Friedrichshafen Ag Verfahren zur Synchronisierung, Stellmotor und Schalteinrichtung mit Stellmotor

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