WO2022008199A1 - Boîte de vitesses - Google Patents

Boîte de vitesses Download PDF

Info

Publication number
WO2022008199A1
WO2022008199A1 PCT/EP2021/066481 EP2021066481W WO2022008199A1 WO 2022008199 A1 WO2022008199 A1 WO 2022008199A1 EP 2021066481 W EP2021066481 W EP 2021066481W WO 2022008199 A1 WO2022008199 A1 WO 2022008199A1
Authority
WO
WIPO (PCT)
Prior art keywords
ring gear
toothing
engagement
stationary component
gearbox according
Prior art date
Application number
PCT/EP2021/066481
Other languages
German (de)
English (en)
Inventor
Andreas Pfeffer
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 WO2022008199A1 publication Critical patent/WO2022008199A1/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
    • F16H—GEARING
    • F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
    • F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
    • F16H3/46—Gearings having only two central gears, connected by orbital gears
    • F16H3/48—Gearings having only two central gears, connected by orbital gears with single orbital gears or pairs of rigidly-connected orbital gears
    • F16H3/52—Gearings having only two central gears, connected by orbital gears with single orbital gears or pairs of rigidly-connected orbital gears comprising orbital spur gears
    • F16H3/54—Gearings having only two central gears, connected by orbital gears with single orbital gears or pairs of rigidly-connected orbital gears comprising orbital spur gears one of the central gears being internally toothed and the other externally toothed
    • 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
    • F16H—GEARING
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/003—Transmissions for multiple ratios characterised by the number of forward speeds
    • F16H2200/0034—Transmissions for multiple ratios characterised by the number of forward speeds the gear ratios comprising two forward speeds
    • 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
    • F16H—GEARING
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/20—Transmissions using gears with orbital motion
    • F16H2200/203—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes
    • F16H2200/2064—Transmissions using gears with orbital motion characterised by the engaging friction means not of the freewheel type, e.g. friction clutches or brakes using at least one positive clutch, e.g. dog clutch
    • 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
    • F16H—GEARING
    • F16H2200/00—Transmissions for multiple ratios
    • F16H2200/20—Transmissions using gears with orbital motion
    • F16H2200/2094—Transmissions using gears with orbital motion using positive clutches, e.g. dog clutches

Definitions

  • the invention relates to a manual transmission with a planetary gear, which has a drive shaft of an externally toothed sun wheel that can be driven in rotation by a drive, in which several externally toothed planetary wheels ei ng tire, which are rotatably mounted on a planet carrier, which has an output shaft coaxial to the input shaft, wherein the planet gears permanently mesh with an internal toothing of a ring gear.
  • a compact design with both a short overall length and a small radial extent is important, particularly in manual transmissions for vehicles with an electric drive that are connected downstream of an electric motor.
  • planetary gears are suitable for this purpose, which are also suitable for mapping ver different switching stages due to their structure.
  • the object of the invention is therefore to create a manual transmission of the type mentioned at the outset that has a simple structure and a small overall length.
  • the ring gear can be moved axially between a neutral position, a first engaged position and a second engaged position and in the first engaged position can be coupled in a non-rotating manner to a stationary component in a force-locking and/or positive-locking manner, with the ring gear being connected to its planet carrier side facing has a second switching toothing, which engages in the second engagement position in a corresponding second counter-toothing of the planet carrier, wherein the ring gear in the neutral position is disengaged from both the stationary component and the second counter-toothing, where the ring gear in the first engaged position non-rotatably coupled to the stationary member and disengaged from the second counter-teeth, and wherein the ring gear is engaged with the second counter-teeth and disengaged from the stationary member in the second engaged position.
  • the neutral position is preferably located between the first engaged position and the second engaged position.
  • the manual transmission is preferably a manual transmission for vehicles with an electric drive, the manual transmission being connected downstream of an electric motor.
  • the inventive design allows both a small axial construction space and a small radial space of the transmission, the transmission has three gears.
  • the ring gear can have a first switching toothing axially on its side facing away from the planet carrier, which can be engaged in a corresponding fixed first counter-toothing on the stationary component.
  • Both the first and the second switching toothing as well as the first and the second counter toothing can be designed as axial toothing or as radial toothing.
  • the ring gear can be guided in an axially displaceable manner in a guide between the neutral position, the first engaged position and the second engaged position.
  • the ring gear can also be rotatably mounted in the guide.
  • the manual transmission can be enclosed in a housing that simultaneously forms the stationary component, with the guide being able to be designed in the housing in a way that saves components and space.
  • the ring gear can also be guided in an axially movable manner by the external toothing of the planetary gears, which leads to a reduction in the installation space of the manual transmission. There is no need for separate storage. For this purpose it is of advantage if the remaining components of the manual transmission have a correspondingly rigid mounting. If the toothing of the ring gear is straight toothing, then there is no axial force component acting on the ring gear that might cause the ring gear to shift too easily.
  • the ring gear and the planet gears are provided with helical gearing.
  • the gearbox shown has a drive shaft 1 of a sun gear 2, the sun gear 2 being rotatably driven by an electric motor, not shown, of a vehicle via the drive shaft 1.
  • the planetary carrier 5 in turn has an output shaft 6 which is coaxial with the input shaft 1 .
  • the planet gears 3 are surrounded by an internally toothed ring gear 7 , in whose internal toothing 13 they engage with their external toothing 14 .
  • the ring gear 7 has a first switching toothing 8 on its side facing away from the planet carrier 5 and a second switching toothing 9 on its side facing the planet carrier 5.
  • a housing 10 of the manual transmission one of the first shift teeth 8 is arranged axially opposite and the first shift teeth 8 corresponding first counter teeth 11 .
  • one of the second switching teeth 9 is arranged axially opposite and the second switching teeth 9 corresponding to the second Ge toothing 12.
  • the ring gear 7 is guided in an axially displaceable manner. In the neutral position shown, it engages with its internal teeth 13 only in external teeth 14 of the planet wheels 3 a. In a rotary drive of the sun gear 2, the planetary gears 3 and of these the ring gear 7 are rotatably driven by him. There is no further drive to an output, so that the neutral position means an idle gear.
  • the ring gear 7 When the ring gear 7 is shifted to the left into a first engagement position, the ring gear 7 engages with its first switching toothing 8 in the first counter-toothing 11 of the stationary housing 10, with the ring gear 7 continuing to engage with its internal toothing 13 in the external toothing 14 of the planet gears 3 .
  • the sun gear 2 When the sun gear 2 is driven in rotation, the planetary gears 3 are rotatably driven by it. Since the ring gear 7 is blocked, the planetary gears 3 rotate in the ring gear 7, so that the planetary carrier 5 is rotatably driven via the axles 4, the rotational movement of which leads to a rotation of the output shaft 6. This is thus rotatably driven in a first gear.
  • the ring gear 7 When the ring gear 7 is shifted to the right into a second engagement position, the ring gear 7 engages with its second switching toothing 9 in the second counter-toothing 12 of the planet carrier 5, with the ring gear 7 continuing to engage with its internal toothing 13 in the external toothing 14 of the planet gears 3.
  • the sun gear When the sun gear is driven in rotation, the planetary gears 3 are rotatably driven by it, which in turn drive the ring gear 7 in a rotatable manner. Since the ring gear 7 is coupled to the planet carrier 5, this rotates together with the ring gear 7. The rotation of the planet carrier 5 leads to a rotation of the output shaft 6. This is thus rotatably driven in a second gear.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Retarders (AREA)

Abstract

L'invention concerne une boîte de vitesses comportant un train planétaire qui comprend un arbre d'entrée (1), pouvant être entraîné en rotation par un entraînement, d'un pignon planétaire (2) à denture extérieure dans lequel s'engrènent plusieurs satellites (3) à denture extérieure montés rotatifs sur un porte-satellite (5) comportant un arbre de sortie (6) coaxial à l'arbre d'entrée (1). Les satellites (3) sont engrenés de manière permanente dans une denture intérieure (13) d'une couronne (7). Cette couronne (7) peut être déplacées axialement entre une position neutre, une première position d'engrènement et une deuxième position d'engrènement et peut être accouplée de manière solidaire en rotation, à force et/ou par complémentarité de forme, dans la première position d'engrènement avec une pièce fixe. La couronne (7) comporte, sur sa face orientée vers le porte-satellite (5), une deuxième denture axiale (9) qui, dans la deuxième position d'engrènement, s'engrène dans une deuxième denture antagoniste (12) axiale correspondante du porte-satellite (5), cette couronne (7) étant dans la position neutre non engrenée avec la pièce fixe, ni avec la deuxième denture antagoniste (12). Dans la première position d'engrènement, la couronne (7) est accouplée de manière solidaire en rotation avec la pièce fixe et non engrenée avec la deuxième denture antagoniste (12). Dans la deuxième position d'engrènement, cette couronne (7) est engrenée avec la deuxième denture antagoniste (12) et non accouplée avec la pièce fixe.
PCT/EP2021/066481 2020-07-06 2021-06-17 Boîte de vitesses WO2022008199A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020208413.0A DE102020208413A1 (de) 2020-07-06 2020-07-06 Schaltgetriebe
DE102020208413.0 2020-07-06

Publications (1)

Publication Number Publication Date
WO2022008199A1 true WO2022008199A1 (fr) 2022-01-13

Family

ID=76532216

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2021/066481 WO2022008199A1 (fr) 2020-07-06 2021-06-17 Boîte de vitesses

Country Status (2)

Country Link
DE (1) DE102020208413A1 (fr)
WO (1) WO2022008199A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR351264A (fr) * 1905-02-04 1905-07-10 Georges Louis Leroy Dispositif de changement de vitesse pour automobiles, à vitesse progressive et marche arrière, sans échappement des dents des pignons
JPS4886286U (fr) * 1972-01-24 1973-10-19
EP3473888A1 (fr) * 2017-10-20 2019-04-24 Bernard Controls Train epicycloïdal avantageusement pour un système servomoteur, procédé et système servomoteur utilisant un tel train epicycloïdal

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1228472A (en) 1915-12-04 1917-06-05 Nels L Olson Traction bearing-wheel.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR351264A (fr) * 1905-02-04 1905-07-10 Georges Louis Leroy Dispositif de changement de vitesse pour automobiles, à vitesse progressive et marche arrière, sans échappement des dents des pignons
JPS4886286U (fr) * 1972-01-24 1973-10-19
EP3473888A1 (fr) * 2017-10-20 2019-04-24 Bernard Controls Train epicycloïdal avantageusement pour un système servomoteur, procédé et système servomoteur utilisant un tel train epicycloïdal

Also Published As

Publication number Publication date
DE102020208413A1 (de) 2022-01-13

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