WO2014044277A1 - Système de transmission - Google Patents

Système de transmission Download PDF

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Publication number
WO2014044277A1
WO2014044277A1 PCT/DE2013/200184 DE2013200184W WO2014044277A1 WO 2014044277 A1 WO2014044277 A1 WO 2014044277A1 DE 2013200184 W DE2013200184 W DE 2013200184W WO 2014044277 A1 WO2014044277 A1 WO 2014044277A1
Authority
WO
WIPO (PCT)
Prior art keywords
toothing
gear
ring gear
arrangement according
plane
Prior art date
Application number
PCT/DE2013/200184
Other languages
German (de)
English (en)
Inventor
Benedikt GEIER
Jürgen OSTERLÄNGER
Ralf Wagner
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
Publication of WO2014044277A1 publication Critical patent/WO2014044277A1/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
    • 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
    • F16H2001/2872—Toothed gearings for conveying rotary motion with gears having orbital motion comprising three central gears, i.e. ring or sun gear, engaged by at least one common orbital gear mounted on an idling carrier

Definitions

  • the invention relates to a gear arrangement, comprising a driven by a drive motor about an axis sun gear with an external toothing, a number of planet gears, which are arranged radially outside the sun gear and which are provided with a toothing, with which they mesh with the external toothing of the sun gear , A stationary ring gear with an internal toothing, wherein the planetary gears mesh with their teeth with the internal teeth of the ring gear, and a rotatably mounted about the output shaft arranged ring gear with an internal toothing, wherein the planetary gears with a toothed axially offset further arranged further teeth are provided, which meshes with the internal teeth of the output ring gear.
  • Such a gear arrangement is referred to as Wolfrom gear (or Wolfrum epicyclic gear) and is described for example in DE 93 18 360 111.
  • a similar solution is shown in DE 20 2009 018 547 U1.
  • Previous drive concepts provide, for example, direct motors (internal rotor motors) with a hollow shaft as the drive element, by means of which a linear movement can be generated; Hereby, an actuator can be actuated, as required for example in a rear-wheel steering.
  • internal rotor motors which transmit their drive torque via a spur gear or a belt drive.
  • axial drives with internal rotor motor commonly used, which are connected to a flanged spur or planetary gear (planetary gear).
  • the gear assembly 1 has an only indicated here drive motor 2, which drives a sun gear 3 about an axis a.
  • the sun gear has an outer toothing 4, which meshes with a number of planetary gears 5, which have a toothing 6; three or more planet gears 5 can be arranged equidistantly around the sun gear 3.
  • a ring gear 7 is arranged stationary and has an internal toothing 8, which meshes with the toothing 6 of the planet gears 5.
  • the sun gear, the planet gears - as far as their teeth 6 is concerned - and the ring gear 7 lie in one plane.
  • the planet gears 6 are axially extended beyond this level and have a toothed portion which carries a toothing 1 1.
  • This toothing meshes with an internal toothing 10, which has a driven ring gear 9.
  • the driven ring gear 9 is mounted concentrically around the axis a rotatably. When driving the sun gear 3 thus the output ring gear 9 rotates with a strong reduction in the slow.
  • the present invention is based on the A u fg abe, a transmission arrangement of the type mentioned in such a way that a more compact design can be achieved.
  • a coaxial drive concept can be achieved wisely.
  • a coaxial drive concept will be proposed, in which both the axial and the radial space can be optimized.
  • the efficiency of the transmission should be increased in comparison with previously known solutions and in particular compared with the known Wolfrom transmission.
  • the gear arrangement should be optimized in particular as a combined motor-gear unit, for example, to drive an electromechanical actuator of a rear-wheel steering.
  • a combined motor-gear unit for example, to drive an electromechanical actuator of a rear-wheel steering.
  • other applications of the arrangement are also conceivable.
  • the planetary gears are provided with three toothings, which are each arranged offset from one another in the axial direction, wherein the first toothing forms the toothed engagement between sun gear and planetary gear and lies in a first plane, wherein the second toothing forms the meshing between stationary ring gear and planetary gear and lies in a second plane, wherein the third toothing forms the toothed engagement between output ring gear and planetary gear and lies in a third plane, wherein all three planes are axially offset from one another.
  • the first level preferably lies between the second level and the third level.
  • the planet gears preferably consist of an integrally formed base body, in which the three gears are incorporated.
  • the teeth of the planet gears preferably have all different pitch circle diameter.
  • the pitch circle diameter of the first toothing is preferably larger than the pitch circle diameter of the second toothing;
  • the pitch circle diameter of the third toothing is preferably smaller than the pitch circle diameter of the first toothing;
  • the pitch circle diameter of the third toothing is preferably smaller than the pitch circle diameter of the second toothing.
  • the toothing modules of the three gears can not all be the same.
  • the modules of the three gears are all different in size. Of course, it can also be provided that the modules of the three gears are the same size.
  • the planet gears can be held by a planet carrier.
  • the drive motor is preferably designed as an external rotor motor, wherein the rotor of the drive motor is fixedly connected to the sun gear.
  • the invention is based on the idea that the main gear (sun gear, planetary gear and stationary ring gear) is provided with stepped planetary gears.
  • the ratio of translation in the main transmission can be increased, which increases the overall efficiency of the transmission.
  • the proposed concept builds - compared to the previously known solution - radially smaller.
  • the axially slightly larger design is irrelevant in many applications, for example, in actuators for a rear-wheel steering, since the electric motor builds longer here anyway.
  • the proposed concept advantageously requires no additional bearing point, since - as in the conventional Wolfrom gear - there is only one common planetary web.
  • an external rotor motor is used and this integrated directly into the transmission. So can be dispensed with a flanged solution.
  • a heavy and expensive direct motor, which is considered as a drive solution is replaced with the present invention by a motor-gearbox combination.
  • the proposed transmission concept is suitable in a special way - but not exclusively - for use in an electromechanical actuator, which is required for example in a rear-wheel steering of a vehicle.
  • the use of the solution according to the invention is recommended wherever large torques have to be generated by small electric motors.
  • Fig. 2 shows schematically the transmission concept according to the present invention, the radial section through a structurally implemented gear arrangement according to an embodiment of the invention and
  • FIG. 4 is a perspective view of the transmission arrangement according to FIG. 3. Detailed description of the figures
  • FIG. 2 the schematic diagram of the transmission assembly 1 according to the invention is outlined.
  • the only indicated here drive motor 2 drives directly the sun gear 3 with its external teeth 4.
  • the sun gear 3 meshes with the planet gears 5, of which at least three are usually arranged around the circumference of the sun gear 3.
  • the planetary gears 5 are formed as stepped planets, ie they have three teeth 6 ', 6 "and 1 1, which are in three different levels Ei, E 2 and E 3 , each axially, ie offset in the direction of the axis a, offset from each other are.
  • the three pitch diameters Di, D 2 and D 3 of the three gears 6 ', 6 "and 1 1 are of different sizes
  • the gear 6' has the largest pitch diameter D-
  • the gear 6" has a smaller pitch Pitch circle diameter D 2
  • the smallest pitch circle diameter D 3 has the teeth 1 1.
  • lies in the plane E- the sun gear 3 and the part of the planet gears 5, which has the teeth 6 '.
  • Axially offset, namely arranged in the plane E 2 the part of the planet gears 5 with the teeth 6 "and the stationary arranged ring gear 7.
  • the portion of the planet gears 5 with the Gearing 1 1 and the internal teeth 10 of the output ring gear Again axially offset thereto, namely arranged in the plane E 3 , the portion of the planet gears 5 with the Gearing 1 1 and the internal teeth 10 of the output ring gear.
  • FIG. 3 shows the gear arrangement according to FIG. 2 in a mirrored arrangement.
  • the drive motor is designed as a permanently excited motor and consists of a stator 14 and a rotor driven by this 13.
  • the rotor 13 is axially and rotatably connected to the sun gear 3.
  • Axial next to the sun gear 3 is sufficient space for receiving other elements, such as an angular position sensor 15; Analogously, other engine control components can be accommodated.
  • the planet gears 5 are formed as a sleeve-shaped body having a base body, on the outer circumference of the three teeth 6 ', 6 "and 1 1 are incorporated (the teeth are not shown in detail)
  • a planetary carrier 12 is not mandatory, however, it can also be used with cantilever planetary gears 5. It is not shown that the ring gear 7 is fixed in a housing element, not shown, the gear assembly Ring gear 7 is received on its outer cylindrical surface in a corresponding portion of the housing.
  • the internal teeth 10 in the output ring gear 9 can be incorporated directly into a hollow cylindrical portion of the output ring gear 9; but it is also just possible that a gear with the toothing 10 is made separately and then inserted into the output ring gear 9. LIST OF REFERENCE NUMBERS

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

Abstract

L'invention concerne un système de transmission (1). Ce dernier comprend une roue solaire (3) entraînée par un moteur d'entraînement (2) autour d'un axe (a) et pourvue d'une denture extérieure (4), un certain nombre de roues planétaires (5) qui sont disposées radialement à l'extérieur de la roue solaire (3) et qui sont pourvues d'une denture (6) au moyen de laquelle elles s'engrènent avec la denture extérieure (4) de la roue solaire (3), et une roue à denture intérieure (7) fixe pourvue d'une denture intérieure (8). Les roues planétaires (5) s'engrènent au moyen de leur denture (6) avec la denture intérieure (8) de la roue à denture intérieure (7). Le système comprend également une roue menée à denture intérieure (9) disposée de manière à pouvoir tourner autour de l'axe (a) et pourvue d'une denture intérieure (10). Les roues planétaires (5) sont pourvues d'une autre denture (11) décalée axialement par rapport à sa denture (6), laquelle denture s'engrène avec la denture intérieure (10) de la roue menée à denture intérieure (9). L'invention vise à fournir une transmission compacte présentant un rendement élevé. A cet effet, les roues planétaires (5) sont pourvues de trois dentures (6', 6", 11) qui sont décalées les unes des autres respectivement dans le sens axial (a). La première denture (6') forme l'engrènement entre la roue solaire (3) et la roue planétaire (5) et se situe dans un premier plan (E1). La deuxième denture (6") forme l'engrènement entre la roue à denture intérieure fixe (7) et la roue planétaire (5) et se situe dans un deuxième plan (E2). La troisième denture (11) forme l'engrènement entre la roue menée à denture intérieure (9) et la roue planétaire (5) et se situe dans un troisième plan (E3), les trois plans (E1, E2, E3) étant tous décalés les uns des autres dans le sens axial.
PCT/DE2013/200184 2012-09-24 2013-09-23 Système de transmission WO2014044277A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012217102.9 2012-09-24
DE201210217102 DE102012217102A1 (de) 2012-09-24 2012-09-24 Getriebeanordnung

Publications (1)

Publication Number Publication Date
WO2014044277A1 true WO2014044277A1 (fr) 2014-03-27

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2013/200184 WO2014044277A1 (fr) 2012-09-24 2013-09-23 Système de transmission

Country Status (2)

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DE (1) DE102012217102A1 (fr)
WO (1) WO2014044277A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108105339A (zh) * 2018-02-09 2018-06-01 佛山市驰康医疗器材有限公司 牙科手机增速直机
WO2018232121A1 (fr) * 2017-06-14 2018-12-20 Dana Automotive Systems Group, Llc Mécanisme d'actionnement

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014226046B4 (de) * 2014-12-16 2020-09-03 Zf Friedrichshafen Ag Wolfrom-Getriebe mit dreifach verzahnten Planeten für eine Windkraftanlage und Verfahren zur Montage von Lagern eines solchen Getriebes
DE102020201340A1 (de) 2020-02-04 2021-08-05 Aktiebolaget Skf Modulare Hochgenauigkeitsgetriebeanordnung

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1970251A (en) * 1932-02-04 1934-08-14 Rossman Engineering Company Mechanical movement
DE9318360U1 (de) 1993-12-01 1994-02-24 Funke Gmbh Planetengetriebe für hohe Übersetzungen
DE4234873A1 (de) * 1992-10-16 1994-04-21 Buehler Gmbh Nachf Geb Baureihe für ein fünfrädriges reduziertes Umlaufrädergetriebe
DE4423902A1 (de) 1994-07-09 1996-04-11 Fibro Gmbh Konzentrischer Getriebemotor
DE202009018547U1 (de) 2009-10-06 2012-01-19 Imo Holding Gmbh Wolfromgetriebe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1970251A (en) * 1932-02-04 1934-08-14 Rossman Engineering Company Mechanical movement
DE4234873A1 (de) * 1992-10-16 1994-04-21 Buehler Gmbh Nachf Geb Baureihe für ein fünfrädriges reduziertes Umlaufrädergetriebe
DE9318360U1 (de) 1993-12-01 1994-02-24 Funke Gmbh Planetengetriebe für hohe Übersetzungen
DE4423902A1 (de) 1994-07-09 1996-04-11 Fibro Gmbh Konzentrischer Getriebemotor
DE202009018547U1 (de) 2009-10-06 2012-01-19 Imo Holding Gmbh Wolfromgetriebe

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018232121A1 (fr) * 2017-06-14 2018-12-20 Dana Automotive Systems Group, Llc Mécanisme d'actionnement
CN110770479A (zh) * 2017-06-14 2020-02-07 德纳汽车系统集团有限责任公司 可缩放的致动机构及其操作方法
CN110770479B (zh) * 2017-06-14 2022-04-19 德纳汽车系统集团有限责任公司 可缩放的致动机构及其操作方法
US11608891B2 (en) 2017-06-14 2023-03-21 Dana Automotive Systems Group, Llc Actuation mechanism
US11619302B2 (en) 2017-06-14 2023-04-04 Dana Automotive Systems Group, Llc Actuation mechanism
US11959550B2 (en) 2017-06-14 2024-04-16 Dana Automotive Systems Group, Llc Actuation mechanism
CN108105339A (zh) * 2018-02-09 2018-06-01 佛山市驰康医疗器材有限公司 牙科手机增速直机
CN108105339B (zh) * 2018-02-09 2024-05-10 佛山市驰康医疗器材有限公司 牙科手机增速直机

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