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WO2021099035A1 - Accouplement d'arbres entre un arbre de rotor d'une machine électrique et un arbre d'entrée d'une boîte de vitesses - Google Patents

Accouplement d'arbres entre un arbre de rotor d'une machine électrique et un arbre d'entrée d'une boîte de vitesses Download PDF

Info

Publication number
WO2021099035A1
WO2021099035A1 PCT/EP2020/078936 EP2020078936W WO2021099035A1 WO 2021099035 A1 WO2021099035 A1 WO 2021099035A1 EP 2020078936 W EP2020078936 W EP 2020078936W WO 2021099035 A1 WO2021099035 A1 WO 2021099035A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
bearing
spline
input shaft
clearance fit
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/EP2020/078936
Other languages
German (de)
English (en)
Inventor
Witold Techman
Tobias SCHLITTENBAUER
Janek KRAEUTER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of WO2021099035A1 publication Critical patent/WO2021099035A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • 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
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/003—Couplings; Details of shafts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
    • 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
    • F16D1/10—Quick-acting couplings in which the parts are connected by simply bringing them together axially
    • F16D2001/103—Quick-acting couplings in which the parts are connected by simply bringing them together axially the torque is transmitted via splined connections
    • 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
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H2057/02034—Gearboxes combined or connected with electric machines

Definitions

  • the invention relates to a shaft connection between a rotor shaft of an electric machine and an input shaft of a transmission arrangement by means of a spline.
  • the invention also relates to the use of the shaft connection in an e-axle module in the drive train of an electrically powered vehicle.
  • DE 102014215564 A1 relates to a bracing arrangement for a drive train of a motor vehicle.
  • a spline is provided between a first disk and a second disk and a counter-toothing.
  • the first disk has a first profile
  • the second disk has a second profile. Both profiles have protruding teeth that engage in a suitable toothing of the respective counter profile.
  • the spaces between the counter-profiling for the teeth of the first profiling and the second profiling have a clearance fit.
  • DE 102016212 815 A1 relates to a shaft connection of a motor vehicle steering system and a steering system for motor vehicles, in particular for commercial vehicles.
  • a spline is provided between an output shaft and an output element. In the area of the spline teeth are formed on the output shaft and further teeth on the output element. Between the teeth of the output element and the teeth of the output shaft there is a slight amount of play. The spline is thus designed as a clearance fit.
  • DE 102012 218277 A1 relates to a handheld power tool.
  • a tool holder and a drive spindle are designed separately from one another and connected to one another via a form-fit connection.
  • the form-fit connection is formed by splines that correspond to one another.
  • a fit of the splines is designed as a sliding fit. This is to be understood in particular as a clearance fit or a transition fit.
  • a shaft connection is proposed between a rotor shaft of an electric machine and an input shaft of a transmission arrangement by means of a spline, the input shaft including a shaft cavity.
  • the splines between the rotor shaft and the input shaft are designed with a clearance fit.
  • the plug connection comprises a radial support surface.
  • the radial support surface in the area of the plug connection is implemented either on the outer circumference of the rotor shaft or on an inner jacket surface of the input shaft, which are connected to one another via the shaft connection proposed according to the invention.
  • the radial support surface in the area of the spline is in one Designed with a minimum clearance fit.
  • the minimum clearance fit is designed in such a way that a minimum clearance of 1 pm is maintained, taking into account a tolerance chain for the entire system.
  • the play of the radial support surface is made as small as possible and the play in the spline is chosen so that the occurrence of tension is prevented in an advantageous manner.
  • the rotor shaft connected to one another via the spline with a clearance fit and the input shaft are accommodated in a triple bearing.
  • an employed storage is carried out between the first bearing and the second bearing or between the first bearing and the third bearing or between the second bearing and the third bearing.
  • angles of incidence formed in the context of the raised bearing are preferably in the range between 0 ° and 45 ° and particularly preferably between 0 ° and 20 °.
  • the invention also relates to the use of the shaft connection in an e-axle module of an electrically powered passenger vehicle, an electrically powered utility vehicle or an electrically powered truck.
  • the solution proposed according to the invention improves the strength and thus the durability of the spline between the rotor shaft and the input shaft and within the areas adjoining them.
  • the solution proposed according to the invention considerably improves the transport of lubricant into the area of the spline. As a result, damage, a highly undesirable material removal from the spline, can be reduced, which is not least due to the fact that that there is a triple bearing between the rotor shaft on the one hand and the input shaft coupled to it via the spline on the other hand.
  • the solution proposed according to the invention enables a not insignificant weight saving to be achieved, and the smoothness of running is also considerably improved.
  • the single figure shows a section through an electric machine, which is coupled to a gear arrangement flanged to the side.
  • FIG. 1 shows an electric machine 10 with a bearing plate 12.
  • the first bearing 16 can be a ball bearing or a different type of bearing with a different rolling element, for example a roller bearing or a tapered roller bearing or the like.
  • the first bearing 16 is acted upon in the axial direction by at least one disk spring 20.
  • a disc spring package can also be provided.
  • the rotor shaft 14 of the electric machine 10 is also supported in a second bearing 22, which is located in a transmission housing 24.
  • the second bearing 22 is designed as a roller bearing and can for example - as shown in Figure 1 - be designed as a ball bearing.
  • the second bearing there is the possibility of equipping the second bearing with a different rolling element geometry, for example as a tapered roller bearing or cylindrical bearing or the like.
  • a radial shaft sealing ring 26 is received on the rotor shaft 14 between the first bearing 16 and the second bearing 22. This encapsulates an electric machine side 28 from a transmission side 30 and prevents lubricant from flowing out of the transmission housing 24 to the electric machine side 28.
  • FIG. 1 also shows that a journal of the rotor shaft 14 is pushed into an input shaft 32.
  • the input shaft 32 includes a shaft cavity 58 and is provided with a pinion 34 on its outer circumference.
  • the input shaft 32 is supported via a third bearing 36, which is received in a gear cover 38.
  • the arrangement of the rotor shaft 14 and the input shaft 32 coupled to it is therefore supported by a triple bearing in the end shield 12 of the electric machine 10 or in the transmission housing 24 and in the transmission cover 38.
  • the shaft connection proposed according to the invention between the rotor shaft 14 of the electric machine 10 on the one hand and the hollow shaft of the input shaft 32 of the transmission arrangement on the other hand is provided with a spline 42.
  • the spline 42 through which the rotor shaft 14 and the input shaft 32 according to the invention Proposed shaft connection are connected to one another, comprises a clearance fit 50.
  • the clearance fit 50 is designed as a minimum clearance fit. This means that in the present context, taking into account the tolerance chain of the entire system, a minimum clearance of 1 pm is maintained.
  • the play of a radial support surface 44 on the spline 42 is designed to be as minimal as possible and the play in the spline 42 is selected so that tensioning of the rotor shaft 14 and the input shaft 32 coupled to one another can be avoided.
  • another shaft connection could also be used, for example a polygonal shaft connection with likewise a very tight clearance fit to increase the smoothness of the run.
  • a radial support surface 44 is implemented.
  • the radial support surface 44 can either be formed on an inner jacket surface 40 of the input shaft 32 formed as a hollow shaft; alternatively, there is the possibility of making the radial support surface 44 also on the outer circumference of the journal of the rotor shaft 14, which protrudes through the plug connection 42 into the shaft cavity 58 within the scope of the clearance fit 50 into the input shaft 32.
  • FIG. 1 also shows that a shim ring 46 is implemented in the area of the third bearing 36 on the outside of the gear cover 38.
  • a parking lock gear 48 is implemented, which is arranged non-rotatably on the input shaft 32 and with a parking lock mechanism, not shown in detail in FIG State interacts.
  • the parking lock mechanism shown here represents an optional design option.
  • the arrangement made up of the electric machine 10 and transmission arrangement is furthermore surrounded by cooling ducts 54 which enclose the rotor / stator arrangement of the electric machine 10.
  • a channel section 56 is shown in a perspective reproduction, via which the cooling channels 54, the Meander along the circumference of the housing, are acted upon with cooling medium.
  • the triple bearing of the shaft connection proposed according to the invention comprising the rotor shaft 14 and the input shaft 32 with the first bearing 16, the second bearing 22 and the third bearing 36 is designed as an adjusted bearing 60.
  • the smoothness of the combination of electric machine 10 and gear arrangement is decisively improved.
  • the smooth running of the proposed gear arrangement can be improved by the adjusted bearing 60, which is formed between the first bearing 16 and the second bearing 22.
  • the angle of incidence that is selected within the framework of the raised bearing 60 is between 0 ° and 45 ° and particularly preferably between 0 ° and 20 °.
  • the third bearing 36 can be braced against the tilted bearing 60, for example, via at least one spring element or one or more shim washers 46.
  • the shaft connection proposed according to the invention Due to the shaft connection proposed according to the invention between the rotor shaft 14 on the one hand and the input shaft 32 having the shaft cavity 58 on the other hand, a considerable improvement in the strength of the spline 42 and in adjoining areas of the drive components can be achieved. A considerable reduction in the wear on the spline 42, which is caused by the static overdetermination, can be achieved. Furthermore, the shaft connection proposed according to the invention enables a considerable saving in weight to be achieved by arranging the components accordingly. Finally, the shaft connection proposed according to the invention is distinguished by the fact that it enables a considerable increase in the efficiency of the electric machine 10 with a flange-mounted transmission through very smooth running.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • General Details Of Gearings (AREA)

Abstract

L'invention concerne un accouplement d'arbres entre un arbre de rotor (14) d'une machine électrique (10) et un arbre d'entrée (32) d'un ensemble boîte de vitesses. L'accouplement d'arbres comprend une denture enfichable (42) et l'arbre d'entrée (32) contient une cavité d'arbre (58). La denture enfichable (42) entre l'arbre de rotor (14) et l'arbre d'entrée (32) est conçue de manière à présenter un ajustement avec jeu (50). L'invention concerne en outre l'utilisation de l'accouplement d'arbres dans un module d'essieu électrique dans la chaîne cinématique d'un véhicule à propulsion électrique.
PCT/EP2020/078936 2019-11-20 2020-10-14 Accouplement d'arbres entre un arbre de rotor d'une machine électrique et un arbre d'entrée d'une boîte de vitesses Ceased WO2021099035A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019217887.1A DE102019217887A1 (de) 2019-11-20 2019-11-20 Wellenverbindung zwischen einer Rotorwelle einer E-Maschine und einer Eingangswelle eines Getriebes
DE102019217887.1 2019-11-20

Publications (1)

Publication Number Publication Date
WO2021099035A1 true WO2021099035A1 (fr) 2021-05-27

Family

ID=72915829

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2020/078936 Ceased WO2021099035A1 (fr) 2019-11-20 2020-10-14 Accouplement d'arbres entre un arbre de rotor d'une machine électrique et un arbre d'entrée d'une boîte de vitesses

Country Status (2)

Country Link
DE (1) DE102019217887A1 (fr)
WO (1) WO2021099035A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230258444A1 (en) * 2022-02-14 2023-08-17 Caterpillar Inc. Generator Rotor Centering Device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022201802A1 (de) 2022-02-22 2023-08-24 Zf Friedrichshafen Ag Lagerungsanordnung von zwei Wellen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040163879A1 (en) * 2003-02-20 2004-08-26 Toru Segawa Electric-powered power steering apparatus
WO2015132066A1 (fr) * 2014-03-06 2015-09-11 Aktiebolaget Skf Boîte manuelle à engrenages
JP2015216819A (ja) * 2014-05-13 2015-12-03 本田技研工業株式会社 モータ構造体
DE102018104685A1 (de) * 2018-03-01 2019-09-05 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Antriebsvorrichtung mit einem Elektromotor und einem Getriebe

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040163879A1 (en) * 2003-02-20 2004-08-26 Toru Segawa Electric-powered power steering apparatus
WO2015132066A1 (fr) * 2014-03-06 2015-09-11 Aktiebolaget Skf Boîte manuelle à engrenages
JP2015216819A (ja) * 2014-05-13 2015-12-03 本田技研工業株式会社 モータ構造体
DE102018104685A1 (de) * 2018-03-01 2019-09-05 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Antriebsvorrichtung mit einem Elektromotor und einem Getriebe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230258444A1 (en) * 2022-02-14 2023-08-17 Caterpillar Inc. Generator Rotor Centering Device

Also Published As

Publication number Publication date
DE102019217887A1 (de) 2021-05-20

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