WO2019238478A1 - Ensemble train épicycloïdal - Google Patents

Ensemble train épicycloïdal Download PDF

Info

Publication number
WO2019238478A1
WO2019238478A1 PCT/EP2019/064570 EP2019064570W WO2019238478A1 WO 2019238478 A1 WO2019238478 A1 WO 2019238478A1 EP 2019064570 W EP2019064570 W EP 2019064570W WO 2019238478 A1 WO2019238478 A1 WO 2019238478A1
Authority
WO
WIPO (PCT)
Prior art keywords
ring gear
planetary gear
housing parts
web
gear
Prior art date
Application number
PCT/EP2019/064570
Other languages
German (de)
English (en)
Inventor
Vyacheslav Brushkivskyy
Walter Fritz
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 WO2019238478A1 publication Critical patent/WO2019238478A1/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
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
    • F16H1/48—Special means compensating for misalignment of axes, e.g. for equalising distribution of load on the face width of the teeth
    • 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
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
    • F16H1/2809—Toothed gearings for conveying rotary motion with gears having orbital motion with means for equalising the distribution of load on the planet-wheels
    • F16H1/2818—Toothed gearings for conveying rotary motion with gears having orbital motion with means for equalising the distribution of load on the planet-wheels by allowing limited movement of the ring gear relative to the casing or shaft
    • 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
    • F16H57/00—General details of gearing
    • F16H57/08—General details of gearing of gearings with members having orbital motion
    • 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
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/17—Toothed wheels
    • F16H2055/176—Ring gears with inner teeth

Definitions

  • the present invention relates to a planetary gear arrangement according to the type defined in more detail in the preamble of claim 1. Furthermore, the present invention relates to a ring gear of a planetary gear stage of such a planetary gear arrangement.
  • a large number of differently designed planetary gears are already known in the prior art.
  • DE 10 2014 202 494 A1 discloses a planetary gear with a partially movable ring gear.
  • the planetary gear comprising a planetary gear stage which comprises a ring gear operatively connected to a housing, on the inner circumferential surface of which at least three planet gears are arranged, the ring gear being flexible in the radial direction and thus partially movable for load balancing between the at least three planet gears and the ring gear.
  • the present invention is based on the object of providing a simple planetary gear arrangement in which a ring gear of a planetary gear stage coupled in a rotationally fixed manner to a housing of the planetary gear arrangement can be optimally centered and aligned during torque transmission.
  • a planetary gear arrangement with a multi-part housing and at least one planetary gear stage comprises a sun gear, a ring gear which is coupled in a rotationally fixed manner to the housing of the planetary gear arrangement and a plurality of rotatably mounted planet gears which are arranged radially between the sun gear and the ring gear and form a toothing engagement with both the sun gear and the ring gear.
  • the ring gear has a first region with an internal toothing and a further region which is designed as a holding web which extends radially outwards.
  • the multi-part housing of the planetary gear arrangement comprises at least two housing parts between which the retaining web of the ring gear is arranged and coupled to the two housing parts in a rotationally fixed manner by means of a positive connection.
  • the positive connection is designed such that it is subject to play both radially and axially.
  • the ring gear can be accommodated in a simple manner between the two housing parts of the planetary gear arrangement via the retaining web and can be coupled in a rotationally fixed manner by means of a positive connection to the housing parts. Because the positive connection is subject to play both radially and axially, the ring gear can be optimally centered or aligned during torque transmission.
  • the planetary gear arrangement can be designed, for example, as a planetary gear, which can only comprise one planetary gear stage or a plurality of planetary gear stages.
  • the housing parts can be, for example, two gear housing parts of a planetary gear which are separable or connectable to one another.
  • one of the housing parts is a gear housing and the other housing part is a motor housing in which, for example, an electrical machine is arranged.
  • the electrical machine can form a drive unit with the at least one planetary gear stage of the planetary gear.
  • the sun gear of the planetary gear can be arranged on the rotor shaft of the electrical machine or can be integrally formed with it and serve as a gear drive, while the rotatable planet gear carrier of the planetary gear is provided as a gear output and the ring gear is coupled to the housing.
  • a speed of the electrical machine can be translated into slow speed.
  • the holding web of the ring gear and the housing parts of the planetary gear arrangement have openings which are aligned with one another, the holding web and the housing parts being connected in a form-fitting manner by means of pins and thus coupled in a rotationally fixed manner.
  • the pins engage in the openings of the housing parts and penetrate the openings of the retaining web.
  • the pins can be designed as dowel pins or as dowel pins.
  • the openings in the retaining web of the ring gear are preferably designed as bores.
  • the bores can be arranged on a so-called perforated ring, that is to say provided evenly distributed over a circumference of the retaining web.
  • the openings in the two housing parts for receiving the pins are preferably designed as bores.
  • the bores in the housing parts have at least almost the same diameter as the pins, via which the housing parts and the ring gear are coupled to one another in a rotationally fixed manner.
  • the pins can be designed as bolt-shaped dowel pins and the bores in the housing parts as dowel pin holes.
  • the dowel pins can be used to center the two housing parts in relation to each other during the assembly of the planetary gear. After assembly of the planetary gear, the ring gear and the two housing parts are rotatably coupled to one another. The two housing parts of the planetary gear arrangement can be firmly connected to one another via an additional screw connection.
  • the bores in the holding web of the ring gear have a larger diameter than the pins on which the ring gear with the holding web is arranged.
  • the interconnected housing parts of the planetary gear arrangement form a receiving area for receiving the retaining web of the ring gear, which, viewed in the axial direction, is designed to be larger than the web thickness of the taking ring of the ring gear.
  • Each of the two housing parts of the planetary gear arrangement forms a stop in the axial direction for the retaining web of the ring gear.
  • the ring gear can be coupled directly to the housing parts of the planetary gear arrangement via the positive connection, which is subject to axial and radial play, without further connecting elements. This enables a simple and inexpensive rotationally fixed coupling of the ring gear to the housing of the planetary gear arrangement.
  • the holding web can preferably be provided on an axial end of the ring gear, as a result of which the ring gear is L-shaped.
  • the ring gear between the retaining web and the area with the internal toothing has a transition area with a smaller cross-section in relation to the area with the internal teeth.
  • the ring gear becomes flexible in the radial direction and is thus designed to be movable, as a result of which load balancing during torque transmission is favored.
  • a torque change occurs, for example, in the event of a load change from a pulling operation to a pushing operation or from a pushing operation to a pulling operation, or when changing to a so-called roll or sail mode or exiting the roll or sail mode.
  • a roll mode is understood to mean driving a vehicle with an open drive train, that is to say a drive-free forward drive or useful turn drive, with the drive motor running.
  • a sailing mode is understood to mean driving a vehicle with an open drive train when the drive motor is switched off. If several torque changes take place, the ring gear is moved back and forth in the axial direction, which leads to annoying noise.
  • At least one elastic element is arranged in the axial direction between the retaining web of the ring gear and at least one of the housing parts.
  • the elastic element can be designed, for example, as a helical spring, corrugated spring, leaf spring or as an elastomer.
  • the at least one elastic element can significantly reduce the noise development when there are torque changes at the planetary gear stage.
  • a plurality of such elastic elements can also be provided distributed over the circumference of the holding web.
  • Fig. 1 is a sectional view of part of a planetary gear arrangement in the area of a housing-fixed ring gear and
  • Fig. 2 is a sectional view of Figure 1 with elements to reduce noise when torque changes.
  • the planetary gear arrangement 1 can be used, for example, in a motor vehicle drive train and has a planetary gear stage with a central sun gear (not shown here), a ring gear 2 which surrounds the sun gear, and rotatably mounted planet gears which are arranged radially between the sun gear and the ring gear 2 such that they each form a first toothing engagement in a radially outer region with an internal toothing 3 of the ring gear 2 and a second toothing engagement in a radially inner region with the sun gear.
  • the ring gear 2 is rotatably coupled to a housing of the planetary gear arrangement 1.
  • the ring gear has a radially outward retaining web 4, which is arranged between a first housing part 5 and a second housing part 6 of the planetary gear arrangement 1 and is positively connected to the housing parts 5, 6 via a plurality of bolts 7.
  • the retaining web 4 of the ring gear 2 and the housing parts 5, 6 of the planetary gear arrangement 1 have mutually aligned bores.
  • the holding web 4 and the housing parts 5, 6 are coupled to one another in a rotationally fixed manner by means of bolts 7.
  • the bolts 7 engage here in the bores in the housing parts 5, 6 and penetrate the bores of the holding web 4. According to FIG.
  • the holding web 4 of the ring gear 2 is arranged.
  • several bolts 7 are provided for receiving the holding web 4, which can be provided evenly distributed over a circumference of the holding web 4.
  • the ring gear 2 can be coupled to the housing of the planetary gear arrangement 1, for example, via six bolts 7.
  • Corresponding bores are then provided in the housing halves 5, 6 and the holding web 4 of the ring gear 2.
  • the bolts 7 and the bores in the two housing parts 5, 6 are designed such that the bolts 7 are arranged in the bores without play in the assembled state of the planetary gear arrangement 1.
  • the bores in the holding web 4 of the ring gear 2 have a larger diameter than the bolts 7 on which the ring gear 4 with the holding web 2 is arranged.
  • the interconnected housing parts 5, 6 of the planetary gear arrangement 1 form a receiving area for receiving the holding web 4, which, viewed in the axial direction, is made larger than the web thickness of the holding web 4.
  • the housing parts 5, 6 of the planetary gear arrangement 1 thus forms a stop in the axial direction for the holding web 4.
  • FIG. 2 shows a sectional view according to FIG. 1, elastic elements 10, 11 being provided in the region of the ring gear receptacle in accordance with this embodiment in order to reduce the noise.
  • a wave spring 11 is shown, and between the retaining web 4 of the ring gear 2 and the second housing part 6, a coil spring 10 is shown, for example.
  • posed. 2 are 4 elastic elements 10 on both sides of the holding web,
  • an elastic element 10, 11 can also be provided only on one side of the holding web 4, which element can then be designed either as a helical spring 10 or as a corrugated spring 11 or as another elastic element.
  • a plurality of elastic elements can be provided, for example in the form of coil springs 10.
  • the at least one elastic element 10, 11 acting on the retaining web 4 of the ring gear 2 in the axial direction can reduce or dampen an axial movement of the ring gear 2 which is caused by existing torque changes on the planetary gear stage, which results in a reduced noise development.

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

Abstract

L'invention concerne un ensemble train épicycloïdal (1) ayant un carter en plusieurs parties et au moins un étage planétaire. Le train épicycloïdal comprend un pignon planétaire, une couronne (2) couplée de manière fixe en rotation au carter, et une pluralité de satellites montés en rotation, les satellites étant disposés radialement entre le pignon planétaire et la couronne (2) et formant un engagement d'engrenage avec le pignon planétaire et la couronne (2). La couronne (2) présente une zone ayant une denture intérieure (3) et une barrette de retenue (4) s'étendant radialement vers l'extérieur, et le carter du train épicycloïdal (1) comprend au moins deux parties de carter (5, 6). La barrette de retenue (4) de la couronne (2) est disposée entre les deux parties de carter (5, 6) et couplée aux deux parties de carter (5, 6) de manière fixe en rotation au moyen d'une liaison par complémentarité de formes, la liaison par complémentarité de formes présentant un jeu radial et axial.
PCT/EP2019/064570 2018-06-13 2019-06-05 Ensemble train épicycloïdal WO2019238478A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018209419.5 2018-06-13
DE102018209419.5A DE102018209419A1 (de) 2018-06-13 2018-06-13 Planetengetriebeanordnung

Publications (1)

Publication Number Publication Date
WO2019238478A1 true WO2019238478A1 (fr) 2019-12-19

Family

ID=66821232

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/064570 WO2019238478A1 (fr) 2018-06-13 2019-06-05 Ensemble train épicycloïdal

Country Status (2)

Country Link
DE (1) DE102018209419A1 (fr)
WO (1) WO2019238478A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019218535A1 (de) * 2019-11-29 2021-06-02 Zf Friedrichshafen Ag Planetengetriebeanordnung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1135256B (de) * 1960-01-13 1962-08-23 Leipzig Getriebewerke Planetengetriebe mit Selbsteinstellung der Zentralraeder
US4503719A (en) * 1981-10-09 1985-03-12 Mitsubishi Denki Kabushiki Kaisha Buffering mechanism for automotive starter
US4848172A (en) * 1986-06-25 1989-07-18 Mitsubishi Denki Kabushiki Kaisha Planetary gear reduction starter
DE102012105549A1 (de) * 2012-06-26 2014-03-20 Zf Lenksysteme Gmbh Planetengetriebe hohlradaufhängung
DE102014202494A1 (de) 2013-12-20 2015-06-25 Robert Bosch Gmbh Planetengetriebe mit einstellbeweglichem Hohlrad

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1001124B (de) * 1953-04-14 1957-01-17 Rotary Hoes Ltd Zusatzgetriebe zum Einbau in Schlepper
DE3516604A1 (de) * 1985-05-08 1986-11-13 Ube Industries, Ltd., Ube, Yamaguchi Planetengetriebe
JP2014177327A (ja) * 2013-03-14 2014-09-25 Sumitomo Heavy Ind Ltd 車輪駆動装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1135256B (de) * 1960-01-13 1962-08-23 Leipzig Getriebewerke Planetengetriebe mit Selbsteinstellung der Zentralraeder
US4503719A (en) * 1981-10-09 1985-03-12 Mitsubishi Denki Kabushiki Kaisha Buffering mechanism for automotive starter
US4848172A (en) * 1986-06-25 1989-07-18 Mitsubishi Denki Kabushiki Kaisha Planetary gear reduction starter
DE102012105549A1 (de) * 2012-06-26 2014-03-20 Zf Lenksysteme Gmbh Planetengetriebe hohlradaufhängung
DE102014202494A1 (de) 2013-12-20 2015-06-25 Robert Bosch Gmbh Planetengetriebe mit einstellbeweglichem Hohlrad

Also Published As

Publication number Publication date
DE102018209419A1 (de) 2019-12-19

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