WO2012052236A1 - Élément de changement de vitesses fonctionnant par complémentarité de forme - Google Patents

Élément de changement de vitesses fonctionnant par complémentarité de forme Download PDF

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Publication number
WO2012052236A1
WO2012052236A1 PCT/EP2011/066185 EP2011066185W WO2012052236A1 WO 2012052236 A1 WO2012052236 A1 WO 2012052236A1 EP 2011066185 W EP2011066185 W EP 2011066185W WO 2012052236 A1 WO2012052236 A1 WO 2012052236A1
Authority
WO
WIPO (PCT)
Prior art keywords
sliding sleeve
profile
switching element
idler gear
element according
Prior art date
Application number
PCT/EP2011/066185
Other languages
German (de)
English (en)
Inventor
Manuel Goetz
Christian Sibla
Detlef Baasch
Matthias Arzner
Johannes Winkler
Steffen Bertsch
Original Assignee
Zf 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 Zf Friedrichshafen Ag filed Critical Zf Friedrichshafen Ag
Publication of WO2012052236A1 publication Critical patent/WO2012052236A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/02—Arrangements for synchronisation, also for power-operated clutches

Definitions

  • the present invention relates to a positive switching element for switching at least one gear ratio for a transmission of a vehicle according to the closer defined in the preamble of claim 1.
  • a tooth-on-tooth position can be resolved by applying a torque to the jaw switching element.
  • the applied torque serves to overcome the friction as a result of the frontal tooth-on-tooth contact in order to allow a relative movement and a subsequent sensing of the sliding sleeve.
  • This results in the problem that at too high torque unwanted high acceleration occurs and thus the meshing process can not be performed because of excessive differential speeds.
  • the present invention is based on the object to propose a form-fitting switching element, with the occurrence of a tooth-on-tooth position during the meshing is reliably prevented.
  • a positive switching element for switching at least one gear ratio for a transmission of a vehicle, for example, for a manual transmission or for a partially or fully automated transmission or dual clutch transmission, wherein at least one on a shaft or the like axially displaceable but rotatably connected sliding sleeve or the like is provided.
  • the sliding sleeve can be moved for example from a non-switched neutral position in at least one switched position by axial displacement, in which then a loose wheel with the shaft rotatably connected to switch a desired gear ratio via corresponding profile contours.
  • the switching element according to the invention can be provided as Einspur silk at least one mechanical Vortast issued or the like, with a pre-alignment of the mutually engageable profile contours of the idler gear and the sliding sleeve is realized.
  • designed as a claw switching element switching element is designed such that at an approximation of the claw halves of the switching element first a pre-sensing or scanning done with the Vortast adopted on the profile contour of the loose-wheel or sliding sleeve fixed coupling half, for example by detent alignment ensure a tooth-to-mouth position. Accordingly, it is ensured that the two coupling halves of the switching element are brought to the idler gear and the sliding sleeve in a defined rotational position to each other, so that the tooth-on-gap position is ensured for the subsequent Einspurvorgang.
  • the pre-pressing device can be provided, for example, on the sliding sleeve side or on the loose-wheel side. It is possible that the Vortast driving is integrated in the sliding sleeve or in the idler gear or is attached to these components. Thus, a one-piece but also multi-part design of sliding sleeve and Vortast recognized or of idler and Vortast issued is possible.
  • the pre-scanning device or pre-pressing device comprises or has at least one scanning element which extends axially on the sliding sleeve and essentially springs in the radial direction.
  • the sensing element is designed so that it extends a profile edge or a tooth of the profile contour of the sliding sleeve in the axial direction, so that with this axial extension of the sensing and alignment can be realized.
  • the profile contour of the idler gear is passed over with each sensing element before the actual meshing, wherein the sensing element then engages in a space provided between the profile flanks gap, so that a favorable for the subsequent meshing rotational angular position between the profile contours is achieved before the meshing, which a Zahn- on-tooth position or profile flanks-on-profile flank position excludes when meshing.
  • a deceleration effect whereby an existing differential speed between the idler gear and the sliding sleeve or the shaft is reduced, so that a desired synchronous speed is reached faster.
  • the profile contour or the dog teeth on the idler gear for example, as internal teeth or the like and the sliding sleeve with an example additional external teeth tions or the like can be performed as a profile contour.
  • the profile contour or the dog teeth on the idler gear for example, as internal teeth or the like and the sliding sleeve with an example additional external teeth tions or the like can be performed as a profile contour.
  • the sensing element also on the profile contour of the idler gear end facing a radial Anformung on the profile contour to be scanned facing side.
  • the Vortast has a plurality of distributed over the circumference of the sliding sleeve arranged sensing elements.
  • the dimensions, in particular the number and also the axial length of the existing sensing elements can be chosen so that both an alignment before the circuit and a driving after the circuit between the sliding sleeve and the idler gear are ensured.
  • a radially aligned external toothing can be provided.
  • the flanks of the external toothing or the profile contour can be designed such that the radial height of the flanks in the direction of the sliding sleeve, that is, for example, continuously reduced in the axial direction, for example. In this way, a flank shape results in the manner of a slope, which drops in the direction of the sliding sleeve.
  • the sliding sleeve Klaueninnen- toothing or the like which is axially displaceable with a corresponding claw outer teeth of the shaft is engaged, so as to ensure the rotationally fixed connection between the sliding sleeve and the shaft.
  • the sliding sleeve for engagement by an actuator can be automatically or mechanically shifted axially further to realize a rotationally fixed connection of idler gear and shaft.
  • Figure 1 is a sectional view of a possible embodiment of a switching element according to the invention.
  • FIG. 2 shows a sectional partial view of a detail according to FIG. 1.
  • FIG. 1 shows by way of example a possible exemplary embodiment of a form-locking shifting element according to the invention for a transmission of a vehicle, wherein the invention is not limited to a specific embodiment of the form-fitting shifting element.
  • the proposed switching element can be used in a manual transmission or in a partially or fully automated transmission, in particular a dual-clutch transmission to realize the engagement of gears or the switching of Gangradpresen.
  • the switching element comprises at least one on a shaft 1 axially displaceable, but rotatably connected sliding sleeve 2, which is actuated by a Wegtorik not shown.
  • a shaft-fixed claw outer toothing 3 is provided, which is constantly in engagement with a profiled contour 4 of the sliding sleeve 2 designed as a claw internal toothing, wherein the sliding sleeve 2 is in contact with a neutral position A or not.
  • a switched position B can be moved to switch a gear ratio.
  • the two aforementioned positions A and B are indicated side by side schematically, with the direction of movement is indicated by an arrow.
  • a loose wheel 5 is shown, which is rotatably supported by a bearing 6 on the shaft 1.
  • the idler gear 5 is provided with an integrally formed coupling part, which extends axially in the direction of the sliding sleeve 2.
  • the coupling part has a profile contour 7 of the idler gear 5 a loose-wheel claw external toothing, which is selected such that in the switched position B, the profile contour 4 of the sliding sleeve 2 is at least partially overlapped with the profile contour 7 of the idler gear 5, so that the sliding sleeve. 2 realized in the switched position B, a rotationally fixed connection between the idler gear 5 and the shaft 1.
  • the sliding sleeve 2 is equipped with a pre-pressing device 8, which realizes a pre-alignment or detent engagement with each other to be brought profile contours 4 and 7 of the sliding sleeve 2 and the idler gear 5 as Einspur silk.
  • a pre-key device as shown in particular in FIG. 2, at least one scanning element 9 is provided.
  • a plurality of sensing elements 9 are distributed over the circumference of the sliding sleeve 2, wherein the number of sensing element 9 is significantly lower, for example half but also less than the number of profile flanks of the profile contour 4 of the sliding sleeve 2.
  • Each sensing element 9 is provided in the extension of an associated profile edge axially projecting on the sliding sleeve 2 and formed substantially resiliently in the radial direction, which is indicated in Figure 1 by a double arrow.
  • the sensing elements 9 or the sensing or Rast istsmaschine executed, for example, as a sheet with spring tabs, which are designed to be radially outwardly elastic.
  • a substantially e.g. hemispherical Anformung 10 radially inwardly formed in the direction of the profile contour 7 of the idler gear 5.
  • the scanning element 9 is shown by a dashed line first in a radially outwardly rejected position, since the sensing element 9 with his Anformung 10 along the inclined profile edge of the profile contour 7 of the idler gear 5 is performed. Due to the hemispherical Anformung 10 a relative rotation between the idler gear 5 and the sliding sleeve 2 is realized, so that the sensing element 9 engages or is inserted into a gap between two profile flanks of the profile contour 7 of the idler gear 5, as shown in Figure 2 by a solid line is.
  • a switching operation can be started from the neutral position N by axial displacement, wherein there is still a relative rotation between the idler gear 5 and the shaft 1 or the sliding sleeve 2.
  • the sliding sleeve 2 is displaced axially such that initially the pre-key device 8 with the scanning elements 9 passes over the profile contour 7 of the idler gear 5.
  • the scanning elements 9 are either initially rejected radially outwardly due to the oblique contour of the profile flanks, when the scanning meets directly on a flank of the profile contour 7, and engage due to the relative rotation in a gap between adjacent profile edges or are immediately at the corresponding angular position in a gap between the flanks led.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Operated Clutches (AREA)

Abstract

L'invention concerne un élément de changement de vitesses fonctionnant par complémentarité de forme, servant à changer au moins un rapport de transmission pour une boîte de vitesses d'un véhicule, comportant au moins un manchon coulissant (2) pouvant coulisser axialement sur un arbre (1) mais solidaire en rotation de ce dernier, ledit manchon coulissant pouvant coulisser axialement à partir d'une position neutre (A), non engagée, dans au moins une position engagée (B), dans laquelle un pignon fou (5) est raccordé à l'arbre (1) de manière solidaire en rotation pour changer un rapport de transmission, par l'intermédiaire de contours profilés (4, 7) correspondants, au moins un dispositif de prépalpage mécanique (8) servant à préaligner les contours profilés (4, 7) à engrener du pignon fou (5) et du manchon coulissant (2).
PCT/EP2011/066185 2010-10-22 2011-09-19 Élément de changement de vitesses fonctionnant par complémentarité de forme WO2012052236A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010042800.0 2010-10-22
DE102010042800A DE102010042800A1 (de) 2010-10-22 2010-10-22 Formschlüssiges Schaltelement

Publications (1)

Publication Number Publication Date
WO2012052236A1 true WO2012052236A1 (fr) 2012-04-26

Family

ID=44651830

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/066185 WO2012052236A1 (fr) 2010-10-22 2011-09-19 Élément de changement de vitesses fonctionnant par complémentarité de forme

Country Status (2)

Country Link
DE (1) DE102010042800A1 (fr)
WO (1) WO2012052236A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110513474A (zh) * 2018-05-22 2019-11-29 Zf 腓德烈斯哈芬股份公司 切换设备以及传动机构

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB523469A (en) * 1938-12-30 1940-07-15 Harold Sinclair Improvements in change-speed or selective gearing
GB2289095A (en) * 1994-05-07 1995-11-08 Jcb Transmissions Ltd Positive clutch
DE10122450A1 (de) 2001-05-09 2002-11-14 Bayerische Motoren Werke Ag Schaltgetriebe für ein Motorrad
DE102005027772A1 (de) * 2005-06-15 2006-12-21 Volkswagen Ag Wechselgetriebe für ein Fahrzeug, insbesondere für ein Kraftfahrzeug
DE102006060534A1 (de) * 2006-12-21 2008-06-26 Schaeffler Kg Synchronisiervorrichtung eines Wechselschaltgetriebes

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3322881C2 (de) * 1983-06-24 1985-05-15 Jahnel-Kestermann Getriebewerke Bochum GmbH, 4630 Bochum Zahnrad-Schaltvorrichtung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB523469A (en) * 1938-12-30 1940-07-15 Harold Sinclair Improvements in change-speed or selective gearing
GB2289095A (en) * 1994-05-07 1995-11-08 Jcb Transmissions Ltd Positive clutch
DE10122450A1 (de) 2001-05-09 2002-11-14 Bayerische Motoren Werke Ag Schaltgetriebe für ein Motorrad
DE102005027772A1 (de) * 2005-06-15 2006-12-21 Volkswagen Ag Wechselgetriebe für ein Fahrzeug, insbesondere für ein Kraftfahrzeug
DE102006060534A1 (de) * 2006-12-21 2008-06-26 Schaeffler Kg Synchronisiervorrichtung eines Wechselschaltgetriebes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110513474A (zh) * 2018-05-22 2019-11-29 Zf 腓德烈斯哈芬股份公司 切换设备以及传动机构

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Publication number Publication date
DE102010042800A1 (de) 2012-04-26

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