WO2020108794A1 - Engrenage planétaire comprenant une roue solaire et une partie d'arbre - Google Patents

Engrenage planétaire comprenant une roue solaire et une partie d'arbre Download PDF

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Publication number
WO2020108794A1
WO2020108794A1 PCT/EP2019/025361 EP2019025361W WO2020108794A1 WO 2020108794 A1 WO2020108794 A1 WO 2020108794A1 EP 2019025361 W EP2019025361 W EP 2019025361W WO 2020108794 A1 WO2020108794 A1 WO 2020108794A1
Authority
WO
WIPO (PCT)
Prior art keywords
sun gear
area
toothing
shaft part
gear
Prior art date
Application number
PCT/EP2019/025361
Other languages
German (de)
English (en)
Inventor
Thomas RUNG
Original Assignee
Sew-Eurodrive Gmbh & 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 Sew-Eurodrive Gmbh & Co. Kg filed Critical Sew-Eurodrive Gmbh & Co. Kg
Priority to EP19801666.9A priority Critical patent/EP3887692A1/fr
Priority to CN201980077617.4A priority patent/CN113167368A/zh
Publication of WO2020108794A1 publication Critical patent/WO2020108794A1/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
    • F16H57/00—General details of gearing
    • F16H57/0018—Shaft assemblies for gearings
    • F16H57/0025—Shaft assemblies for gearings with gearing elements rigidly connected to a shaft, e.g. securing gears or pulleys by specially adapted splines, keys or methods
    • 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
    • F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
    • F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
    • F16D1/064—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end non-disconnectable
    • F16D1/072—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end non-disconnectable involving plastic deformation
    • 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

Definitions

  • the invention relates to a planetary gear with a sun gear and a shaft part.
  • a planetary gear has a sun gear to be driven which is in engagement with planet gears which are in engagement with the internal toothing of a ring gear.
  • the invention is therefore based on the object of developing a planetary gear with a sun gear and a shaft part, wherein a high variance of planetary gears of a series of planetary gears should be achievable with a small number of components
  • the object is achieved in the planetary gear according to the features specified in claim 1.
  • the shaft part has a toothing area and a first centering area and a second centering area, the toothing area being arranged axially between the first and the second centering area, the first centering area and a Part of the toothing area of the
  • Sun gear is pressed in, in particular where the partial area corresponds to half of the toothing area, the partial area being connected to the sun gear in a rotational test.
  • the advantage here is that the toothing area of the shaft part is pressed into the sun gear.
  • the sun is divided in two, i.e. by means of a sun gear and a connected shaft part. This creates an interface so that sun gears of different sizes can be connected to the shaft part. Since the shaft part can be connected to a hollow shaft, in particular another hub, as well as to the sun gear, one is
  • each centering area is cylindrical or has cylindrical areas, in particular with different outside diameters.
  • the partial area is positively connected to the sun gear, in particular wherein the toothing of the partial area is cut into the sun gear and / or is pressed in in a plastically deforming manner.
  • the advantage here is that a positive connection is achieved. If, therefore, the centering area pressed into the sun gear and thus non-positively connected to the sun gear is subjected to too high a torque and thus the non-positive connection to the sun gear fails, the positive connection of the toothing area still results
  • the area covered by the recess in the axial direction is larger than the area of the shaft part covered by the area pressed into the sun gear in the axial direction, in particular the free space thereby formed having a greater axial width than the first centering area.
  • the advantage here is that the moment of inertia is as small as possible and therefore high dynamics can be achieved in the drives.
  • the shaft part is made of a different material than the sun gear,
  • the shaft part has hardened steel, in particular in the toothing region and the sun gear is formed in particular in the region of the receiving bore from non-hardened steel.
  • the advantage here is that only the stressed component has to be made from a more expensive material. The less stressed component can then be produced from a less expensive material.
  • the sun gear is made from the same prefabricated part as a planet gear of the planetary gear, in particular wherein the inner diameter of the receiving bore of the sun gear is the same as the inner diameter of the receiving bore of the planet gear.
  • the planet gear is on a needle bearing
  • the toothing of the planet gear is engaged, the toothing of the planet gear engaging with the toothing of the sun gear, the sun gear being rotatably mounted relative to the ring gear.
  • the advantage here is that the planet gear and sun gear have the same mounting hole and thus the
  • the first and second centering areas have the same axial extent.
  • the shaft part can be manufactured symmetrically, that is, the shaft part can be designed mirror-symmetrically to a plane of symmetry whose Normal direction is aligned parallel to the axis of rotation of the shaft part and the
  • the toothing area has a rolled
  • Toothing in particular a knurled toothing, in particular with the toothing being ground at its radially outer end region.
  • the advantage here is that the toothing area is inexpensive to manufacture and a positive connection with the sun gear can be achieved in a cost-effective manner.
  • the second centering region and a further partial region of the toothing region are pressed into a further hub, the further hub being connected in a rotationally fixed manner to a rotor shaft of an electric motor or being a rotor shaft of an electric motor designed as a hollow shaft.
  • connection type with the sun gear as well as with the other hub is applicable.
  • the toothing area is used axially on both sides for the positive connection and there is no risk of breakage that could be reached by a notch.
  • the shaft part has a center hole of the same size axially on both sides, in particular for receiving the shaft part on one
  • Processing machine in particular wherein the first of the center holes is mirror-symmetrical to the other center hole, in particular to the second of the center holes.
  • the advantage here is that the shaft part has no preferred direction and thus simple handling during manufacture is feasible.
  • the connection is equally strong on both sides.
  • FIG. 1 shows a first sun wheel 4 of a first planetary gear connected to a shaft part 1.
  • FIG. 2 shows a second sun gear 20 connected to the shaft part 1, which belongs to a larger planetary gear than the one belonging to FIG. 1
  • FIG. 3 shows a third sun gear 30 connected to the shaft part 1, which belongs to a larger planetary gear than the one belonging to FIG. 2
  • FIG. 4 shows a partially cut view so that the two center holes 40 of the shaft part 1 of the same size are visible.
  • FIG. 5 shows a one-piece embodiment not according to the invention, in which a recess 53 can be seen between the externally toothed sun gear 50 and the toothed connecting area 54, which is produced by the manufacture of the
  • the sun gear 4 is hollow, that is, as a hub, and rotatably connected to a shaft part 1, in particular insertion pinion.
  • the shaft part 1 has a toothed area 3, in particular knurled teeth, which is arranged axially between two centering areas 2, in particular cylindrical areas.
  • the first of these two centering areas 2 is inserted into the sun gear 4 with a partial area of the toothed area 3.
  • This first of the centering areas 2 ends flush with the sun gear 4.
  • the remaining partial area of the toothed area 3 and the other of the two centering areas 2 protrude axially, so that a further hub can be pushed onto the shaft part 1 and can thus be connected in a rotationally fixed manner to the further hub part, that is to say the further hub.
  • the further hub part can be designed as a hollow shaft, which is, for example, a rotor shaft of an electric motor or is connected to it in a rotationally fixed manner.
  • the shaft part 1 is also connected in a rotationally fixed manner to the sun wheel 4, in that, when the shaft part 1 is pressed into the sun wheel 4, the centering region 2 first moves axially
  • the shaft part is centered on the recess, in particular the bore, and thus the shaft part 1 is guided as the toothed region 3 is pressed in further.
  • the outer diameter of the toothed region 3 is larger than the inner diameter of the recess of the sun gear 4.
  • the toothed area thus cuts into the sun gear 4 during further pressing. In this way, a rotationally secure connection is achieved. This is because if the positive connection effected by the sun gear 4 in the area of the centering region 2 is overloaded, at least the positive connection still acts.
  • the further hub can be pressed onto the shaft part 1 in the same way.
  • the toothing region 3 has no notch point, in particular not in the axial end region of the sun gear 4.
  • the sun gear 20 of the exemplary embodiment according to FIG. 2 extends axially further than the sun gear 4 of the exemplary embodiment according to FIG. 1.
  • the shaft part 1 of the sun gear 20 only protrudes into the recess, so that there is a free space 21 at the axial end area of the sun gear 20 which faces axially away from the toothing area 3.
  • the toothing area 3 is preferably designed as a rolled toothing
  • the toothing being ground, that is to say limited to a given outer diameter, in particular cut off.
  • the heads of the toothing thus only extend up to this outer diameter.
  • the toothing area is in turn only pressed in with its partial area.
  • the shaft part 1 is only pushed so far axially into the sun gear 4 that only half of the area covered by the toothing area 3 in the axial direction is located in the sun gear.
  • FIG. 3 shows a sun gear 30 which is even larger in comparison with FIG. 2, the shaft part 1 again being inserted only up to its axial half. Therefore, the free space 31 is also larger.
  • the shaft part has axially centering holes 40 on both sides, with which it can be received in a processing machine.
  • the two center holes are of the same size. In this way, there is a simplification, in particular standardization of the shaft part 1, and the manufacturability, in particular of small shaft parts.
  • shaft parts of different sizes can therefore be picked up by means of the same processing machine, in particular by means of the same mandrel of the processing machine.
  • the gear teeth of the sun gears (4, 20, 30) are manufactured in the same way, in particular on the same processing machine, in particular using the same prefabricated parts as those of the planet gear of the planetary gear.
  • a first centering bore 51 and a second centering bore 52 are shown in FIG. 5, in a one-piece design of the shaft part, together with the sun gear, a first centering bore 51 and a second centering bore 52
  • the second being larger than the first.
  • FIGS. 1 to 4 Another advantage of the embodiment according to FIGS. 1 to 4 is that a different material can be used for the shaft part than for the sun gear (4, 20, 30).
  • ADI can be used as a sun gear and simple steel for the shaft part or vice versa.
  • the shaft part 1 can thus be produced from a particularly stable material.
  • the sun gear 4, 20, 30 due to its hollow design, ie design as a hub, can be produced from the same prefabricated part, in particular thus with the same bore, as a planet gear of the planetary gear.
  • Planetary gearbox can be made from identical prefabricated parts, in particular so that only one type of prefabricated parts has to be kept in stock in the warehouse for manufacture.
  • the corresponding toothing of the sun gear or the planet gear can be applied by means of the processing machine.
  • the introduction of the interface simplifies downstream processing steps, in particular finishing processes, in particular coating the gear teeth with, for example, a vacuum-based coating method for the sun gear (4, 20, 30).
  • the centering region 2 is divided into regions with different diameters, so that threading, pre-centering and

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

Abstract

Engrenage planétaire comprenant une roue solaire et une partie d'arbre, la partie d'arbre présentant une zone de denture et une première zone de centrage et une deuxième zone de centrage, la zone de denture étant disposée axialement entre la première et la deuxième zone de centrage, la première zone de centrage et une partie de zone de la zone de denture étant enfoncées dans un évidement de la roue solaire, la partie de zone étant connectée solidaire en rotation avec la roue solaire.
PCT/EP2019/025361 2018-11-28 2019-10-24 Engrenage planétaire comprenant une roue solaire et une partie d'arbre WO2020108794A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP19801666.9A EP3887692A1 (fr) 2018-11-28 2019-10-24 Engrenage planétaire comprenant une roue solaire et une partie d'arbre
CN201980077617.4A CN113167368A (zh) 2018-11-28 2019-10-24 具有太阳轮和轴部件的行星齿轮减速器

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018009329.9 2018-11-28
DE102018009329 2018-11-28

Publications (1)

Publication Number Publication Date
WO2020108794A1 true WO2020108794A1 (fr) 2020-06-04

Family

ID=68536754

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2019/025361 WO2020108794A1 (fr) 2018-11-28 2019-10-24 Engrenage planétaire comprenant une roue solaire et une partie d'arbre

Country Status (4)

Country Link
EP (1) EP3887692A1 (fr)
CN (1) CN113167368A (fr)
DE (1) DE102019007398A1 (fr)
WO (1) WO2020108794A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4833906A (en) * 1987-10-19 1989-05-30 Star Fasteners International, Inc. Machine for making star-shaped fasteners
DE4019119A1 (de) * 1990-06-12 1992-01-02 Mannesmann Ag Zahnverbindung
EP0661474A1 (fr) * 1993-12-31 1995-07-05 Alpha Getriebebau GmbH Fixation sur un arbre
DE19517258A1 (de) * 1995-05-11 1996-11-14 Alpha Getriebebau Gmbh Wellen-Befestigung
US6408669B1 (en) * 2000-11-15 2002-06-25 Delphi Technologies, Inc. Method and apparatus for wheel spindles and the like with improved LRO
DE10239393A1 (de) * 2002-08-28 2004-03-11 Zf Friedrichshafen Ag Welle-Nabe-Verbindung
JP2004142519A (ja) * 2002-10-22 2004-05-20 Honda Motor Co Ltd 電動駐車ブレーキ装置
DE102015007470A1 (de) 2015-06-10 2015-12-10 Daimler Ag Verfahren zum Herstellen einer Welle-Nabe-Verbindung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009257423A (ja) * 2008-04-15 2009-11-05 Toyota Motor Corp スプライン連結構造および動力伝達装置
CN101476602B (zh) * 2009-01-19 2013-10-30 山东省费县金轮机械厂 多功能自由离合器
DE102012210465A1 (de) * 2012-06-21 2013-12-24 Zf Friedrichshafen Ag Planetengetriebevorrichtung mit wenigstens einem Sonnenrad

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4833906A (en) * 1987-10-19 1989-05-30 Star Fasteners International, Inc. Machine for making star-shaped fasteners
DE4019119A1 (de) * 1990-06-12 1992-01-02 Mannesmann Ag Zahnverbindung
EP0661474A1 (fr) * 1993-12-31 1995-07-05 Alpha Getriebebau GmbH Fixation sur un arbre
DE19517258A1 (de) * 1995-05-11 1996-11-14 Alpha Getriebebau Gmbh Wellen-Befestigung
US6408669B1 (en) * 2000-11-15 2002-06-25 Delphi Technologies, Inc. Method and apparatus for wheel spindles and the like with improved LRO
DE10239393A1 (de) * 2002-08-28 2004-03-11 Zf Friedrichshafen Ag Welle-Nabe-Verbindung
JP2004142519A (ja) * 2002-10-22 2004-05-20 Honda Motor Co Ltd 電動駐車ブレーキ装置
DE102015007470A1 (de) 2015-06-10 2015-12-10 Daimler Ag Verfahren zum Herstellen einer Welle-Nabe-Verbindung

Also Published As

Publication number Publication date
EP3887692A1 (fr) 2021-10-06
DE102019007398A1 (de) 2020-05-28
CN113167368A (zh) 2021-07-23

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