WO2017088868A1 - Flat end stop in a sliding sleeve - Google Patents

Flat end stop in a sliding sleeve Download PDF

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Publication number
WO2017088868A1
WO2017088868A1 PCT/DE2016/200503 DE2016200503W WO2017088868A1 WO 2017088868 A1 WO2017088868 A1 WO 2017088868A1 DE 2016200503 W DE2016200503 W DE 2016200503W WO 2017088868 A1 WO2017088868 A1 WO 2017088868A1
Authority
WO
WIPO (PCT)
Prior art keywords
sliding sleeve
stops
teeth
stop
tooth
Prior art date
Application number
PCT/DE2016/200503
Other languages
German (de)
French (fr)
Inventor
Dennis Tonsen
Original Assignee
Schaeffler Technologies AG & Co. KG
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 Schaeffler Technologies AG & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Priority to CN201680063349.7A priority Critical patent/CN108350956B/en
Publication of WO2017088868A1 publication Critical patent/WO2017088868A1/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D23/00Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/02Arrangements for synchronisation, also for power-operated clutches
    • F16D23/04Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch
    • F16D23/06Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch and a blocking mechanism preventing the engagement of the main clutch prior to synchronisation
    • F16D23/0612Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch and a blocking mechanism preventing the engagement of the main clutch prior to synchronisation the blocking mechanism comprising a radial pin in an axial slot with at least one branch
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D23/00Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/02Arrangements for synchronisation, also for power-operated clutches
    • F16D23/04Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch
    • F16D23/06Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch and a blocking mechanism preventing the engagement of the main clutch prior to synchronisation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D23/00Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/02Arrangements for synchronisation, also for power-operated clutches
    • F16D23/04Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch
    • F16D23/06Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch and a blocking mechanism preventing the engagement of the main clutch prior to synchronisation
    • F16D2023/0618Details of blocking mechanism comprising a helical spring loaded element, e.g. ball
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D23/00Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/02Arrangements for synchronisation, also for power-operated clutches
    • F16D23/04Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch
    • F16D23/06Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch and a blocking mechanism preventing the engagement of the main clutch prior to synchronisation
    • F16D2023/0631Sliding sleeves; Details thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D23/00Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/02Arrangements for synchronisation, also for power-operated clutches
    • F16D23/04Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch
    • F16D23/06Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch and a blocking mechanism preventing the engagement of the main clutch prior to synchronisation
    • F16D2023/0656Details of the tooth structure; Arrangements of teeth
    • F16D2023/0662Details relating to special geometry of arrangements of teeth
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D23/00Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/02Arrangements for synchronisation, also for power-operated clutches
    • F16D23/04Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch
    • F16D23/06Arrangements for synchronisation, also for power-operated clutches with an additional friction clutch and a blocking mechanism preventing the engagement of the main clutch prior to synchronisation
    • F16D2023/0656Details of the tooth structure; Arrangements of teeth
    • F16D2023/0668Details relating to tooth end or tip geometry

Definitions

  • the invention relates to limit stops for limiting a switching path of a sliding sleeve in a synchronizing device of a manual transmission, in particular for motor vehicles.
  • Sliding sleeves are usually used as coupling elements in synchronizers of motor vehicle transmissions. They connect a gear shaft rotationally fixed with a rotatably mounted on the transmission shaft gear.
  • the sliding sleeve is arranged concentrically to the transmission shaft rotationally fixed on a likewise rotatably connected to the transmission shaft synchronous carrier body and slidable in the longitudinal direction of the transmission shaft in two end positions, as can be coupled with a gear.
  • a sliding sleeve generally has a locking means for a locking element, as shown in DE 10 201 1 103 780 A1.
  • Sliding sleeves have on their inner lateral surface on an inwardly facing toothing, which engages in a counter-toothing of the synchronous carrier body and in the switched state in a toothing of the gear wheel.
  • DE 10 2007 030 507 A1 shows a sliding sleeve produced from a circularly curved toothed belt with an internal toothing, wherein at least one stop for limiting the axial displaceability of the sliding sleeve is provided, which is arranged on a tooth of the internal toothing of the sliding sleeve.
  • DE 101 63 830 A1 shows a sliding sleeve with an internal toothing which is produced from a circularly bent sheet-metal strip and has at least one stop corresponding to the height of the toothing for limiting its axial sliding path and which is arranged in a tooth gap between two teeth.
  • the invention has for its object to provide a stop for a sliding sleeve, which is easy to manufacture and has a secure end stop.
  • the attacks have a width which corresponds approximately to a tooth thickness plus two tooth spaces.
  • the abutment surface of such an arrangement is even slightly increased when the stop height is halved.
  • the attacks are arranged evenly distributed in one embodiment on the circumference of the internal teeth, in particular, three stops are each provided to switching gear wheel, which means a total of six stops for a two-speed shift shift sleeve.
  • switching gear wheel which means a total of six stops for a two-speed shift shift sleeve.
  • groups of stops which are arranged such that one stop group has two stops which are separated by at least one tooth, preferably three teeth of the internal toothing.
  • the stop groups are arranged distributed uniformly on the circumference of the internal toothing. Point the teeth of the sliding sleeve at their the gear wheels facing areas in each case an end-face roof toothing, which facilitates the engagement of the teeth of the sliding sleeve in the teeth of the coupling teeth.
  • the stop areas also have a corresponding roof toothing, which is arranged on the front side on the edge of the sliding sleeve.
  • a width, height and depth of the stops are dimensioned such that a bending stiffness of the sliding sleeve in the region of the stops corresponds to the bending stiffness of the sliding sleeve in the region of the teeth.
  • FIG. 1 a synchronization device with sliding sleeve in section in a schematic representation of FIG. 2 a partial view of the sliding sleeve in a perspective view
  • Fig.1 denotes a shaft of a manual transmission for motor vehicles, on which two gear wheels 2 and 3 are freely rotatably mounted. Between these two gear wheels 2 and 3, a synchronizer 4 is arranged, via which either one of the two gear wheels 2 or 3 can be coupled to the shaft 1. In this way, the gearbox is switched to different gear ratios.
  • the synchronizing device 4 has a synchronous carrier body 5, which engages in rotation in a toothing 6 of the shaft 1. Furthermore, the synchronous carrier body 5 is provided on its outer circumference with an external toothing 7, in which teeth 8 of an internal toothing of a sliding sleeve 9 engage. In the synchronous carrier body 5, a pressure piece 10 is further guided with a compression spring 1 1, which receives a spherical in the longitudinal direction over the pressure piece 10 projecting locking element 12. The spherical locking element 12 protrudes from the synchronous carrier body 5 to approximately the tip circle of the external toothing 7.
  • synchronizer rings 14 and 15 On both sides of the pressure piece 10 synchronizer rings 14 and 15 are arranged, the outside have a locking teeth 16 and 17 and inside a friction surface 18 and 19 respectively. Sliding surfaces 18 and 19 of the synchronizer rings 14 and 15 cooperate with correspondingly formed friction surfaces 20 and 21, which are formed on gear 3 as well as on a rotatably connected to the gear 2 clutch ring 22.
  • an axial force on the respective synchronizer ring 14 or 15 is exercised during a corresponding locking synchronization via the pressure member 10, so that it is driven via its friction surface 18 or 19 of the corresponding friction surface 20 or 21 and against the synchronous carrier. 5 is rotated by a certain angle. In this position, the locking teeth locks a further displacement of the sliding sleeve 9.
  • Figures 2 and 3 show a sliding sleeve 9 with teeth 8, and tooth spaces 33, which is made of strip material.
  • the toothing 6 is first introduced into the strip material for this purpose.
  • This toothed belt 34 is then bent and the ends are fixed together.
  • stops 31 are provided on the circumference of the teeth 8 of the sliding sleeve. Preferably three stops 31 per sliding sleeve 9 and each gear 2;
  • each sliding sleeve 9 and each gear 2; 3 is a stop group 34 consisting of two stops 31 is provided.
  • the two stops 31 are arranged separated by at least one tooth 8, preferably three teeth 8.
  • the stop groups 34 are arranged distributed uniformly on the circumference of the sliding sleeve 9 corresponding to the individual stops 31.
  • a width B, height H and depth T of the stops 31 is ideally dimensioned so that a flexural rigidity of the sliding sleeve 9 in the region of the stops 31 is just as great as a flexural rigidity in the region of the teeth 8.
  • the stops 31, or stop groups 34 are each arranged at a distance a from an edge 38 of the sliding sleeve 9 spaced.
  • the roof teeth 8a in this case extend beyond the tooth height HZ to below the root circle 37 into the body of the sliding sleeve 9.
  • roof teeth 31 a are also provided in the region of the stops 31, which are arranged in the body of the sliding sleeve 9 and extend to the root 37.
  • the stops 31 have a cuboid shape.

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

Abstract

In order to limit the shifting path of a sliding sleeve in a synchronizing device of a manual transmission, stops are arranged between the teeth of the internal gear of the sliding sleeve, said stops having a height that is smaller than the height of the teeth of the internal gear of the sliding sleeve.

Description

Titel  title
Flacher Endstop in Schiebemuffe Die Erfindung betrifft Endanschläge zur Begrenzung eines Schaltweges einer Schiebemuffe in einer Synchronisiereinrichtung eines Schaltgetriebes, insbesondere für Kraftfahrzeuge. Flat end stop in sliding sleeve The invention relates to limit stops for limiting a switching path of a sliding sleeve in a synchronizing device of a manual transmission, in particular for motor vehicles.
Schiebemuffen sind in der Regel als Kupplungselemente in Synchronisiereinrichtungen von Kraftfahrzeuggetrieben eingesetzt. Sie verbinden eine Getriebewelle verdrehfest mit einem auf der Getriebewelle drehbar gelagerten Gangrad. Dabei ist die Schiebemuffe konzentrisch zur Getriebewelle drehfest auf einem ebenfalls drehfesten mit der Getriebewelle verbundenen Synchronträgerkörper angeordnet und in Längsrichtung der Getriebewelle in zwei Endstellungen verschiebbar, so wie mit einem Gangrad kuppelbar. Eine Schiebemuffe weist in der Regel ein Rastmittel für ein Arretierelement auf, wie es in DE 10 201 1 103 780 A1 dargestellt ist. Sliding sleeves are usually used as coupling elements in synchronizers of motor vehicle transmissions. They connect a gear shaft rotationally fixed with a rotatably mounted on the transmission shaft gear. In this case, the sliding sleeve is arranged concentrically to the transmission shaft rotationally fixed on a likewise rotatably connected to the transmission shaft synchronous carrier body and slidable in the longitudinal direction of the transmission shaft in two end positions, as can be coupled with a gear. A sliding sleeve generally has a locking means for a locking element, as shown in DE 10 201 1 103 780 A1.
Schiebemuffen weisen an ihrer Innenmantelfläche eine nach innen weisende Verzahnung auf, die in eine Gegenverzahnung des Synchronträgerkörpers und im geschalteten Zustand in eine Verzahnung des Gangrades eingreift. Durch die DE 102 29 91 1 A1 ist eine Schiebemuffe mit einem aus einem Blechstreifen gefertigten Grundkörper bekannt, der in seinem Ausgangszustand zumindest einseitig profiliert oder verzahnt ist und dessen Enden nach einem kreisrunden Biegen aneinander befestigt sind. Die DE 10 2007 030 507 A1 zeigt eine aus einem kreisrund gebogenen Verzahnungsband hergestellte Schiebemuffe mit einer Innenverzahnung, wobei mindestens ein Anschlag zur Begrenzung der axialen Verschiebbarkeit der Schiebemuffe vorgesehen ist, der auf einem Zahn der Innenverzahnung der Schiebemuffe angeordnet ist. Die DE 101 63 830 A1 zeigt eine Schiebemuffe mit einer Innenverzahnung, die aus einem kreisrund gebogenen Blechstreifen hergestellt ist und zur Begrenzung ihres axialen Schiebeweges mindestens einen der Höhe der Verzahnung entsprechenden Anschlag aufweist, der in einer Zahnlücke zwischen zwei Zähnen angeordnet ist. Derartige Anschläge sind schwierig aus dem Grundband der Schiebemuffe zu formen, da die Streckgrenze leicht erreicht wird und die Genauigkeit der die Anschläge umgebenden Zähne beeinflusst wird. Zudem wird eine aus einem abgelängten Blechstreifen hergestellte Schiebemuffe dadurch biegesteifer, so dass ein anschließendes Biegen zu einer Kreisform durch die hohen Anschläge deutlich erschwert ist. Eine Reduzierung der Anschlaghöhe scheidet aus, weil der Kupplungskörper dann nicht mehr gegen eine genügend große Anschlagsfläche anschlagen kann. Die Endstopfunktion würde beeinträchtigt. Sliding sleeves have on their inner lateral surface on an inwardly facing toothing, which engages in a counter-toothing of the synchronous carrier body and in the switched state in a toothing of the gear wheel. From DE 102 29 91 1 A1 discloses a sliding sleeve with a manufactured from a metal strip body is known, which is profiled or toothed in its initial state at least on one side and the ends are fixed to a circular bending together. DE 10 2007 030 507 A1 shows a sliding sleeve produced from a circularly curved toothed belt with an internal toothing, wherein at least one stop for limiting the axial displaceability of the sliding sleeve is provided, which is arranged on a tooth of the internal toothing of the sliding sleeve. DE 101 63 830 A1 shows a sliding sleeve with an internal toothing which is produced from a circularly bent sheet-metal strip and has at least one stop corresponding to the height of the toothing for limiting its axial sliding path and which is arranged in a tooth gap between two teeth. Such attacks are difficult to form from the base band of the sliding sleeve, as the yield strength is easily reached and the accuracy of the teeth surrounding the attacks is affected. In addition, a sliding sleeve made of a cut sheet metal strip is thus more rigid, so that a subsequent bending to a circular shape by the high attacks is much more difficult. A reduction of the stop height is eliminated because the coupling body can then no longer strike against a sufficiently large stop surface. The end-stop function would be impaired.
Der Erfindung liegt die Aufgabe zugrunde einen Anschlag für eine Schiebemuffe zu schaffen, die einfach herstellbar ist und einen sicheren Endanschlag aufweist. The invention has for its object to provide a stop for a sliding sleeve, which is easy to manufacture and has a secure end stop.
Die Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruchs 1 gelöst. The object is achieved by the features of claim 1.
Es ist ein besonderer Vorteil der Erfindung, dass die zwischen Zähnen der Innenverzahnung der Schiebemuffe angeordneten Anschläge eine geringere Höhe aufweisen, als die Zähne. Durch diese Maßnahme ist es möglich, die Biegesteifigkeit eines Blechstreifens, aus welchem die Schiebemuffe kreisrund gebogen wird, über den gesamten Biegeradius annähernd gleich steif auszubilden. Eine gleichmäßige Biegesteifigkeit verbessert die Qualität der Schiebemuffe und vereinfacht dessen Herstellungsprozess. Darüberhinaus wird das Kalibrierverhalten verbessert. It is a particular advantage of the invention that arranged between teeth of the internal teeth of the sliding sleeve stops have a lower height than the teeth. By this measure, it is possible to form the bending stiffness of a metal strip from which the sliding sleeve is circular, over the entire bending radius approximately the same stiff. A uniform bending stiffness improves the quality of the sliding sleeve and simplifies its manufacturing process. In addition, the calibration behavior is improved.
Zur Erzielung einer gleichmäßigen Biegesteifigkeit ist es besonders vorteilhaft, wenn die An- Schläge eine Breite aufweisen die in etwa einer Zahndicke zuzüglich zweier Zahnlücken entspricht. Im Vergleich zu einem Endanschlag, dessen Höhe den übrigen Zähnen entspricht und der in einem Zahnzwischenraum angeordnet ist, wird die Anschlagfläche einer derartigen Anordnung sogar dann etwas vergrößert, wenn die Anschlaghöhe halbiert ist. Die Anschläge sind in einer Ausführungsform gleichmäßig am Umfang der Innenverzahnung verteilt angeordnet, insbesondere sind jeweils drei Anschläge je zu schaltendem Gangrad vorgesehen, das bedeutet insgesamt sechs Anschläge für eine zwei Gangräder schaltbare Schiebemuffe. Zur Vergrößerung der Gesamtanschlagfläche, können auch Gruppen von Anschlägen vorgesehen werden, welche derart angeordnet werden, dass eine Anschlaggruppe zwei Anschläge aufweist, die durch mindestens einen Zahn, vorzugsweise drei Zähne der Innenverzahnung getrennt sind. Es ist in vorteilhafter Weise vorgesehen, dass auch die Anschlaggruppen gleichmäßig am Umfang der Innenverzahnung verteilt angeordnet sind. Die Zähne der Schiebemuffe weisen an ihren den Gangrädern zugewandten Bereichen jeweils eine stirnseitige Dachverzahnung auf, die das Eingreifen der Zähne der Schiebemuffe in die Zähne der Kupplungsverzahnung erleichtert. In vorteilhafter Ausgestaltung weisen auch die Anschlagbereiche eine entsprechende Dachverzahnung auf, welche stirnseitig am Rand der Schiebemuffe angeordnet ist. To achieve a uniform bending stiffness, it is particularly advantageous if the attacks have a width which corresponds approximately to a tooth thickness plus two tooth spaces. Compared to an end stop whose height corresponds to the other teeth and which is arranged in a tooth space, the abutment surface of such an arrangement is even slightly increased when the stop height is halved. The attacks are arranged evenly distributed in one embodiment on the circumference of the internal teeth, in particular, three stops are each provided to switching gear wheel, which means a total of six stops for a two-speed shift shift sleeve. To increase the total stop surface, it is also possible to provide groups of stops which are arranged such that one stop group has two stops which are separated by at least one tooth, preferably three teeth of the internal toothing. It is advantageously provided that the stop groups are arranged distributed uniformly on the circumference of the internal toothing. Point the teeth of the sliding sleeve at their the gear wheels facing areas in each case an end-face roof toothing, which facilitates the engagement of the teeth of the sliding sleeve in the teeth of the coupling teeth. In an advantageous embodiment, the stop areas also have a corresponding roof toothing, which is arranged on the front side on the edge of the sliding sleeve.
Im Idealfall ist eine Breite, Höhe und Tiefe der Anschläge so bemessen, dass eine Biegesteif- igkeit der Schiebemuffe im Bereich der Anschläge der Biegesteifigkeit der Schiebemuffe im Bereich der Zähne entspricht. Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird im Folgenden beschrieben. Es zeigen Ideally, a width, height and depth of the stops are dimensioned such that a bending stiffness of the sliding sleeve in the region of the stops corresponds to the bending stiffness of the sliding sleeve in the region of the teeth. An embodiment of the invention is illustrated in the drawings and will be described below. Show it
Fig.1 eine Synchronisiereinrichtung mit Schiebemuffe im Schnitt in schematischer Darstellung Fig.2 eine Teilansicht der Schiebemuffe in perspektivischer Darstellung 1 a synchronization device with sliding sleeve in section in a schematic representation of FIG. 2 a partial view of the sliding sleeve in a perspective view
Fig.3 einen Querschnitt durch die Schiebemuffe in einer Teilansicht 3 shows a cross section through the sliding sleeve in a partial view
In Fig.1 ist mit 1 eine Welle eines Schaltgetriebes für Kraftfahrzeuge bezeichnet, auf welcher zwei Gangräder 2 und 3 frei drehbar gelagert sind. Zwischen diesen beiden Gangrädern 2 und 3 ist eine Synchronisiereinrichtung 4 angeordnet, über welche wahlweise eines der beiden Gangräder 2 oder 3 an die Welle 1 kuppelbar ist. Auf diese Weise wird das Schaltgetriebe in unterschiedliche Übersetzungsstufen geschaltet. In Fig.1, 1 denotes a shaft of a manual transmission for motor vehicles, on which two gear wheels 2 and 3 are freely rotatably mounted. Between these two gear wheels 2 and 3, a synchronizer 4 is arranged, via which either one of the two gear wheels 2 or 3 can be coupled to the shaft 1. In this way, the gearbox is switched to different gear ratios.
Die Synchronisiereinrichtung 4 weist einen Synchronträgerkörper 5 auf, der drehfest in eine Verzahnung 6 der Welle 1 eingreift. Weiterhin ist der Synchronträgerkörper 5 an seinem äuße- ren Umfang mit einer Außenverzahnung 7 versehen, in welche Zähne 8 einer Innenverzahnung einer Schiebemuffe 9 eingreifen. Im Synchronträgerkörper 5 ist weiterhin ein Druckstück 10 mit einer Druckfeder 1 1 geführt, welcher ein kugelförmiges in Längsrichtung über das Druckstück 10 vorstehendes Rastelement 12 aufnimmt. Das kugelförmige Rastelement 12 ragt dabei aus dem Synchronträgerkörper 5 bis etwa zum Kopfkreis der Außenverzahnung 7 vor. In der Neutralstellung der Synchronisiereinrichtung 4, in der keine der beiden möglichen Gangstufen geschaltet ist und sich somit die beiden Gangräder 2 und 3 gegenüber der Welle 1 drehen, greift das Rastelement 12 in eine Innenverzahnung 8 der Schiebemuffe 9 ausgebildete Rasten 13 ein. The synchronizing device 4 has a synchronous carrier body 5, which engages in rotation in a toothing 6 of the shaft 1. Furthermore, the synchronous carrier body 5 is provided on its outer circumference with an external toothing 7, in which teeth 8 of an internal toothing of a sliding sleeve 9 engage. In the synchronous carrier body 5, a pressure piece 10 is further guided with a compression spring 1 1, which receives a spherical in the longitudinal direction over the pressure piece 10 projecting locking element 12. The spherical locking element 12 protrudes from the synchronous carrier body 5 to approximately the tip circle of the external toothing 7. In the neutral position of the synchronizer 4, in which neither of the two possible gear ratios is engaged and thus the two gear wheels 2 and 3 rotate relative to the shaft 1, the locking element 12 engages in an internal toothing 8 of the sliding sleeve 9 formed detents 13 a.
Beiderseits des Druckstücks 10 sind Synchronringe 14 und 15 angeordnet, die außen eine Sperrverzahnung 16 bzw. 17 und innen eine Reibfläche 18 bzw. 19 aufweisen. Gleitflächen 18 und 19 der Synchronringe 14 und 15 wirken mit entsprechend ausgebildeten Reibflächen 20 und 21 zusammen, welche an Gangrad 3 so wie an einem drehfest mit dem Gangrad 2 verbundenen Kupplungsring 22 ausgebildet sind. Während eines Schaltvorganges wird bei einer entsprechenden Sperrsynchronisierung über das Druckstück 10 zunächst während des Ansynchronisierens eine axiale Kraft auf den jeweiligen Synchronring 14 oder 15 ausgeübt, so dass dieser über seine Reibfläche 18 oder 19 von der entsprechenden Reibfläche 20 oder 21 mitgenommen und gegenüber dem Synchronträger 5 um einen bestimmten Winkel verdreht wird. In dieser Lage sperrt die Sperrverzahnung eine weitere Verschiebung der Schiebemuffe 9. Diese Sperrwirkung wird erst dann aufgehoben wenn Gleichlauf zwischen dem jeweiligen Gangrad 2 bzw. 3 und der Welle 1 erzielt ist. In diesem Moment wird die Innenverzahnung 8 der Schiebemuffe 9 durch die Sperrverzahnung 16, 17 hindurch bewegt und gelangt schließlich in Eingriff mit einer Kupplungsverzahnung 23 bzw. 24. On both sides of the pressure piece 10 synchronizer rings 14 and 15 are arranged, the outside have a locking teeth 16 and 17 and inside a friction surface 18 and 19 respectively. Sliding surfaces 18 and 19 of the synchronizer rings 14 and 15 cooperate with correspondingly formed friction surfaces 20 and 21, which are formed on gear 3 as well as on a rotatably connected to the gear 2 clutch ring 22. During a switching operation, an axial force on the respective synchronizer ring 14 or 15 is exercised during a corresponding locking synchronization via the pressure member 10, so that it is driven via its friction surface 18 or 19 of the corresponding friction surface 20 or 21 and against the synchronous carrier. 5 is rotated by a certain angle. In this position, the locking teeth locks a further displacement of the sliding sleeve 9. This locking effect is only canceled if synchronization between the respective gear 2 and 3 and the shaft 1 is achieved. At this moment, the internal toothing 8 of the sliding sleeve 9 is moved through the locking teeth 16, 17 and finally reaches into engagement with a coupling toothing 23 or 24.
Die Figuren 2 und 3 zeigen eine Schiebemuffe 9 mit Zähnen 8, und Zahnlücken 33, welche aus Bandmaterial hergestellt ist. Bei der Herstellung wird in das Bandmaterial dazu zunächst die Verzahnung 6 eingebracht. Dieses Verzahnungsband 34 wird dann gebogen und die Enden miteinander fest verbunden. In die Zahnlücken 33 greifen, sofern ein Gang geschaltet ist, Zähne der Kupplungsverzahnung 23 bzw. 24 ein. Zur Begrenzung der axialen Verschiebbarkeit der Schiebemuffe 9 sind am Umfang der Verzahnung 8 der Schiebemuffe 9 gleichmäßig verteilt Anschläge 31 vorgesehen. Vorzugsweise jeweils drei Anschläge 31 je Schiebemuffe 9 und je Gangrad 2; 3. Figures 2 and 3 show a sliding sleeve 9 with teeth 8, and tooth spaces 33, which is made of strip material. During production, the toothing 6 is first introduced into the strip material for this purpose. This toothed belt 34 is then bent and the ends are fixed together. In the tooth spaces 33, if a gear is engaged, teeth of the coupling teeth 23 and 24, respectively. To limit the axial displacement of the sliding sleeve 9 9 9 evenly distributed stops 31 are provided on the circumference of the teeth 8 of the sliding sleeve. Preferably three stops 31 per sliding sleeve 9 and each gear 2; Third
Der Anschlag 31 ist zwischen zwei Zähnen 8 der Schiebemuffe 9 angeordnet und weist eine Höhe HA auf, die geringer ist, als eine Zahnhöhe HZ der Zähne 8, vorzugsweise entspricht die Anschlaghöhe HA der Hälfte der Zahnhöhe HZ (HA = 0,5 x HZ). The stop 31 is arranged between two teeth 8 of the sliding sleeve 9 and has a height HA which is less than a tooth height HZ of the teeth 8, preferably the stop height HA corresponds to half of the tooth height HZ (HA = 0.5 × HZ). ,
Der Anschlag 31 weist eine Breite B auf, die einer Zahndicke D zuzüglich der Weite von zwei Zahnlücken 33 entspricht. Ausgehend davon, dass eine Zahnlücke 33 genauso breit ist, wie eine Zahndicke D, beträgt die Breite B ein dreifaches der Dicke D (B = 3 x D). The stop 31 has a width B which corresponds to a tooth thickness D plus the width of two tooth gaps 33. Assuming that a tooth gap 33 is as wide as a tooth thickness D, the width B is three times the thickness D (B = 3 × D).
Zur Vergrößerung der Anschlagfläche ist es vorgesehen, dass je Schiebemuffe 9 und je Gangrad 2; 3 eine Anschlaggruppe 34 bestehend aus jeweils zwei Anschlägen 31 vorgesehen ist. Hierbei sind die beiden Anschläge 31 durch mindestens ein Zahn 8, vorzugsweise drei Zähne 8 voneinander getrennt angeordnet. Die Anschlaggruppen 34 sind entsprechend den Einzelanschlägen 31 gleichmäßig am Umfang der Schiebemuffe 9 verteilt angeordnet. To increase the stop surface, it is provided that each sliding sleeve 9 and each gear 2; 3 is a stop group 34 consisting of two stops 31 is provided. Here, the two stops 31 are arranged separated by at least one tooth 8, preferably three teeth 8. The stop groups 34 are arranged distributed uniformly on the circumference of the sliding sleeve 9 corresponding to the individual stops 31.
Eine Breite B, Höhe H und Tiefe T der Anschläge 31 ist idealerweise so bemessen, dass eine Biegesteifigkeit der Schiebemuffe 9 im Bereich der Anschläge 31 genauso groß ist, wie eine Biegesteifigkeit im Bereich der Zähne 8. A width B, height H and depth T of the stops 31 is ideally dimensioned so that a flexural rigidity of the sliding sleeve 9 in the region of the stops 31 is just as great as a flexural rigidity in the region of the teeth 8.
Die Anschläge 31 , bzw. Anschlaggruppen 34 sind jeweils in einem Abstand a von einem Rand 38 der Schiebemuffe 9 beabstandet angeordnet. The stops 31, or stop groups 34 are each arranged at a distance a from an edge 38 of the sliding sleeve 9 spaced.
Die Zähne 8 der Schiebemuffe 9 weisen den Gangrädern 2, 3 zugewandt, stirnseitig Dachverzahnungen 8a auf, die das Einspuren der Innenverzahnung 8 der Schiebemuffe 9 in die Kupplungsverzahnungen 23, 24 erleichtern. Die Dachverzahnung 8a reichen hierbei über die Zahnhöhe HZ bis unterhalb des Fußkreises 37 in den Körper der Schiebemuffe 9 hinein. Da- rüber hinaus sind im Bereich der Anschläge 31 auch Dachverzahnungen 31 a vorgesehen, die im Körper der Schiebemuffe 9 angeordnet sind und sich bis zum Fußkreis 37 erstrecken. The teeth 8 of the sliding sleeve 9, the gear wheels 2, 3 facing, frontally roof teeth 8a, which facilitate the meshing of the internal teeth 8 of the sliding sleeve 9 in the coupling teeth 23, 24. The roof teeth 8a in this case extend beyond the tooth height HZ to below the root circle 37 into the body of the sliding sleeve 9. In addition, roof teeth 31 a are also provided in the region of the stops 31, which are arranged in the body of the sliding sleeve 9 and extend to the root 37.
Die Anschläge 31 weisen eine quaderförmige Form auf. The stops 31 have a cuboid shape.
Bezugszeichenliste LIST OF REFERENCE NUMBERS
1 Welle 1 wave
2 Gangrad  2 gear wheel
3 Gangrad 3 gear wheel
4 Synchronisiereinrichtung  4 synchronizer
5 Synchronträgerkörper  5 synchronous carrier body
6 Verzahnung  6 toothing
7 Außenverzahnung  7 external toothing
8 Zähne 8 teeth
8a Dachverzahnung (8)  8a roof toothing (8)
9 Schiebemuffe  9 sliding sleeve
10 Druckstück  10 pressure piece
1 1 Druckfeder  1 1 compression spring
12 Rastelement 12 locking element
13 Rastnut  13 locking groove
14 Synchronring  14 synchronizer ring
15 Synchronring  15 synchronizer ring
16 Sperrverzahnung  16 locking teeth
17 Sperrverzahnung 17 locking teeth
18 Reibfläche (14)  18 friction surface (14)
19 Reibfläche (15)  19 friction surface (15)
20 Reibfläche (22)  20 friction surface (22)
21 Reibfläche (24)  21 friction surface (24)
22 Kupplungsring 22 coupling ring
23 Kupplungsverzahnung  23 Clutch toothing
24 Kupplungsverzahnung  24 Clutch toothing
31 a Dachverzahnung (31 ) 31 a Roofing (31)
33 Zahnlücke 33 tooth gap
34 Anschlaggruppe 34 stop group
37 Fußkreis (8)  37 foot circle (8)
38 Rand (9)  38 edge (9)
D Dicke (8) D thickness (8)
B Breite (31 ) B width (31)
T Tiefe (31 ) T depth (31)
HA Anschlaghöhe (31 ) HZ Zahnhöhe (8) a Abstand (31 ;34 - 38) HA stop height (31) HZ tooth height (8) a distance (31; 34 - 38)

Claims

Patentansprüche claims
1 . Schiebemuffe zum Schalten von Gangstufen eines Schaltgetriebes mit mindestens einem eine Kupplungsverzahnung aufweisenden Gangrad, wobei die Schiebemuffe aus einer neutralen Stellung in Richtung des Gangrades verschiebbar ist und eine Innenverzahnung zum Eingriff in die Kupplungsverzahnung, so wie Anschläge zur Begrenzung der axialen 1 . Sliding sleeve for switching gear ratios of a gearbox with at least one gear having a clutch gear, wherein the sliding sleeve is displaceable from a neutral position in the direction of the gear wheel and an internal toothing for engagement in the clutch teeth, such as stops for limiting the axial
Verschiebbarkeit der Schiebemuffe aufweist, wobei die Anschläge (31 ) in Zahnlücken (33) zwischen Zähnen (8) der Innenverzahnung der Schiebemuffe (9) angeordnet sind, dadurch gekennzeichnet, dassund die Anschläge (31 ) eine Anschlaghöhe (HA) aufweisen, die kleiner ist als eine Zahnhöhe (HZ) der Zähne (8) mit (HA < HZ). Displaceability of the sliding sleeve, wherein the stops (31) in tooth spaces (33) between teeth (8) of the internal teeth of the sliding sleeve (9) are arranged, characterized in that the stops (31) have a stop height (HA), which is smaller as a tooth height (HZ) of the teeth (8) with (HA <HZ).
2. Schiebemuffe nach Anspruch 1 , dadurch gekennzeichnet, 2. sliding sleeve according to claim 1, characterized
dass die Anschlaghöhe (HA) höchstens einhalb mal so groß ist wie die Zahnhöhe (HZ) mit (HA <= 0,5 HZ). that the stop height (HA) is at most one and a half times the height of the tooth (HZ) with (HA <= 0.5 HZ).
3. Schiebemuffe nach Anspruch 1 oder 2, dadurch gekennzeichnet, 3. sliding sleeve according to claim 1 or 2, characterized
dass die Anschläge (31 ) eine Anschlagbreite (B) aufweisen, die einer Zahndicke (D) und zwei Zahnlücken (33) entspricht. in that the stops (31) have a stop width (B) which corresponds to a tooth thickness (D) and two tooth spaces (33).
4. Schiebemuffe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, 4. sliding sleeve according to one of claims 1 to 3, characterized
dass die axial gerichtete Fläche der Anschläge (31 ) mindestens so groß ist wie die Axialfläche eines Zahnzwischenraums. that the axially directed surface of the stops (31) is at least as large as the axial surface of a tooth space.
5. Schiebemuffe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, 5. sliding sleeve according to one of claims 1 to 4, characterized
dass Anschlaggruppen (34) vorgesehen sind, die aus Anschlägen (31 ;31 ) bestehen, die ihrerseits durch mindestens einen Zahn (8) voneinander getrennt angeordnet sind und dass die Anschlaggruppen (34) gleichmäßig am Umfang der Innenverzahnung (8) verteilt angeordnet sind. in that stop groups (34) are provided which consist of stops (31; 31) which are in turn separated from each other by at least one tooth (8) and in that the stop groups (34) are distributed uniformly around the circumference of the internal toothing (8).
6. Schiebemuffe nach Anspruch 5, dadurch gekennzeichnet, 6. sliding sleeve according to claim 5, characterized
dass drei Zähne (8) zwischen den Anschlägen (31 ; 31 ) einer Anschlaggruppe (34) angeordnet sind. in that three teeth (8) are arranged between the stops (31, 31) of a stop group (34).
7. Schiebemuffe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Schiebemuffe (9) für jedes zu schaltende Gangrad (2; 3) mindestens einen Anschlag (31 ) oder eine Anschlaggruppe (34) aufweist, die jeweils in einem Abstand (a) von einem Rand (38) der Schiebemuffe (9) und axial hintereinander angeordnet sind. 7. Sliding sleeve according to one of the preceding claims, characterized in that the sliding sleeve (9) for each gear wheel to be switched (2, 3) at least one stop (31) or a stop group (34), each at a distance (a) from an edge (38) of the sliding sleeve (9) and arranged axially one behind the other.
8. Schiebemuffe nach Anspruch 7, dadurch gekennzeichnet, dass der Bereich, der axial zwischen zwei Anschlägen (31 ) ist, in seiner Radialhöhe dem Grundband der Schiebemuffe entspricht. 8. Sliding sleeve according to claim 7, characterized in that the region which is axially between two stops (31) corresponds in its radial height to the baseband of the sliding sleeve.
9. Schiebemuffe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Zähne (8) stirnseitig eine Dachverzahnung (8a) aufweisen und 9. Sliding sleeve according to one of the preceding claims, characterized in that the teeth (8) frontally have a roof toothing (8a) and
dass im Bereich der Anschläge (31 ) ebenfalls eine Dachverzahnung (31 a) vorgesehen ist. that in the region of the stops (31) also a roof toothing (31 a) is provided.
10. Schiebemuffe nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass eine Breite (B), Höhe (HA) und Tiefe (T) der Anschläge (31 ) so bemessen ist, dass eine Biegesteifigkeit der Schiebemuffe (9) im Bereich der Anschläge (31 ) oder Anschlaggruppen (34) der Biegesteifigkeit der Schiebemuffe (9) im Bereich der Zähne (8) entspricht. 10. Sliding sleeve according to one of the preceding claims, characterized in that a width (B), height (HA) and depth (T) of the stops (31) is dimensioned such that a flexural rigidity of the sliding sleeve (9) in the region of the stops ( 31) or stop groups (34) corresponds to the flexural rigidity of the sliding sleeve (9) in the region of the teeth (8).
PCT/DE2016/200503 2015-11-26 2016-11-08 Flat end stop in a sliding sleeve WO2017088868A1 (en)

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DE102015223420 2015-11-26

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DE (1) DE102016221798A1 (en)
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DE102017119327B3 (en) 2017-08-24 2018-09-06 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Switching device for a transmission

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