WO2020086997A1 - Motor to gearbox assembly with attachment means - Google Patents

Motor to gearbox assembly with attachment means Download PDF

Info

Publication number
WO2020086997A1
WO2020086997A1 PCT/US2019/058134 US2019058134W WO2020086997A1 WO 2020086997 A1 WO2020086997 A1 WO 2020086997A1 US 2019058134 W US2019058134 W US 2019058134W WO 2020086997 A1 WO2020086997 A1 WO 2020086997A1
Authority
WO
WIPO (PCT)
Prior art keywords
motor
gearbox
input shaft
shaft
assembly
Prior art date
Application number
PCT/US2019/058134
Other languages
French (fr)
Inventor
Jefferey ZIEMBA
Original Assignee
Linamar Corporation
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 Linamar Corporation filed Critical Linamar Corporation
Publication of WO2020086997A1 publication Critical patent/WO2020086997A1/en

Links

Classifications

    • 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
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/54—Systems consisting of a plurality of bearings with rolling friction
    • F16C19/546—Systems with spaced apart rolling bearings including at least one angular contact bearing
    • 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
    • F16D1/108—Quick-acting couplings in which the parts are connected by simply bringing them together axially having retaining means rotating with the coupling and acting by interengaging parts, i.e. positive coupling
    • F16D1/116—Quick-acting couplings in which the parts are connected by simply bringing them together axially having retaining means rotating with the coupling and acting by interengaging parts, i.e. positive coupling the interengaging parts including a continuous or interrupted circumferential groove in the surface of one of the coupling parts
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2361/00—Apparatus or articles in engineering in general
    • F16C2361/61—Toothed gear systems, e.g. support of pinion shafts
    • 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
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2361/00—Apparatus or articles in engineering in general
    • F16C2361/65—Gear shifting, change speed gear, gear box
    • 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
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears

Definitions

  • the present invention relates to a motor to gearbox assembly wherein a motor shaft is coupled to an input shaft of the gearbox by an attachment means.
  • An electric motor for a driveline of a motor vehicle typically includes a motor comprising a motor housing for rotatably supporting and driving an elongated motor shaft and a gearbox fixedly connected to the motor housing.
  • a gearbox housing rotatably supports an input shaft which is splined to the motor shaft for rotation therewith to drive a set of gears.
  • the assembly of the gearbox to the motor is generally accomplished by bolting the gearbox housing to the motor housing.
  • the follow design allows the motor shaft to be axially constrained within the gearbox input shaft allowing the motor shaft to be installed at lower cost and in a less complex manner than previous designs.
  • a motor to gearbox assembly including a motor shaft and an input shaft of the gearbox.
  • the input shaft is coupled to the motor shaft to allow for a quick connection therebetween.
  • a gearbox housing the gearbox housing rotatably supports the gearbox input shaft.
  • at least one attachment means the attachment means is used to axially constrain the motor shaft to the gearbox input shaft.
  • the attachment means is in contact with a back angle to eliminate axial play between the motor shaft and the gearbox input shaft.
  • FIG. 1 is a cross-sectional view of the motor shaft to gearbox assembly with an attachment means
  • FIG. 2 is another cross-sectional side view of the motor shaft to gearbox assembly with an attachment means according to an alternative embodiment.
  • the present invention relates to a motor to gearbox assembly 10 wherein a motor shaft 12 is coupled to a gearbox input shaft 14 by an attachment means 16 to allow for a quick connection therebetween.
  • the motor shaft 12 of the motor to gearbox assembly 10 is received within an opening 18 of the gearbox input shaft 14.
  • the gearbox input shaft 14 is elongated and hollow and is rotatably supported within a gearbox housing 20 by a plurality of bearings 22.
  • there are three bearings 22 being used in total to support the gearbox input shaft 14.
  • Two of the three bearings 22 are located within the gearbox housing 20 and one of the three bearings 22 is located within a motor housing 24. It is understood that the number and location of the bearings 22 may vary from one embodiment to another.
  • the motor shaft 12 is supported deep within a gearbox 26 of the motor to gearbox assembly 10 creating a long span of alignment.
  • the gearbox input shaft 14 further includes a splined inner surface 30.
  • the splined inner surface 30 of the gearbox input shaft 14 mates with a set of grooves on an outer surface 32 of the motor shaft 12 allowing for translation of rotation therebetween. Rotation is then translated from the gearbox input shaft 14 to a set of helical gears 40.
  • the set of helical gears 40 are part of the gearbox 26 of the motor to gearbox assembly 10.
  • the gearbox 26 is surrounded by the gearbox housing 20.
  • the gearbox housing 20 is bolted to the motor housing 24.
  • the gearbox housing 20 further includes an input seal 42.
  • the input seal 42 seals the gearbox input shaft 14 and the bearings 22 within the gearbox housing 20.
  • the motor shaft 12 is aligned with the gearbox input shaft 14 by a pilot fit portion 50 of the motor shaft 12 and a pilot fit portion 52 of the gearbox input shaft 14.
  • the pilot fit portion 50 of the motor shaft 12 and the pilot fit portion 52 of the gearbox input shaft 14 are narrower than the rest of their respective shafts to allow for a constrained and snug fit with one another.
  • the two shafts are coupled by the attachment means 16.
  • the attachment means 16 is used to axially constrain the motor shaft 12 to the gearbox input shaft 14.
  • the attachment means 16 fits into a notch 60 formed between the outer surface 32 of the motor shaft 12 and the inner surface 30 of the gearbox input shaft 14. Axial play is eliminated by the contact between the attachment means 16 and a back angle 62 of the motor shaft 12.
  • the back angle 62 of the motor shaft 12 and the size of the attachment means 16 can be engineered in each case for a desired retention result.
  • the use of the attachment means 16 allows for the motor shaft 12 to be installed at a lower cost and in a less complex manner than previous designs.
  • the attachment means 16 may be a circlip 64.
  • the circlip 64 fits into the notch 60 formed between the outer surface 32 of the motor shaft 12 and the inner surface 30 of the gearbox input shaft 14.
  • the circlip 64 wraps around the outer surface 32 of the motor shaft 12 and contacts with the back angle 62 of the motor shaft 12.
  • the attachment means 16 may be a bolt 68.
  • the bolts 68 extends through a central bore in the motor shaft 12 and is threaded to an inner bore of the gearbox input shaft 14.
  • a bolt head 70 is in contact with end of the motor shaft 12 to axially interconnect the motor shaft 12 and gearbox input shaft 14. It is understood that other attachment means or a combination of attachment means may be used in other embodiments.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

A motor to gearbox assembly (10) includes a motor shaft (12) and an input shaft (14) of the gearbox. The input shaft is coupled to the motor shaft to allow for quick connection therebetween. Further included is a gearbox housing (20), the gearbox housing rotatably supports the gearbox input shaft. Also included is at least one attachment means (16), the attachment means is used to axially constrain the motor shaft to the gearbox input shaft.

Description

MOTOR TO GEARBOX ASSEMBLY WITH ATTACHMENT MEANS
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] This application claims priority to and all the benefits of U.S. Provisional Patent Application No. 62/750,437, filed October 25, 2018, and entitled“Motor to Gearbox Assembly with Circlip”, the disclosure of which is hereby incorporated by reference in its entirety.
BACKGROUND OF THE INVENTION
1. Field of Invention
[0002] The present invention relates to a motor to gearbox assembly wherein a motor shaft is coupled to an input shaft of the gearbox by an attachment means.
2. Description of Related Art
[0003] An electric motor for a driveline of a motor vehicle typically includes a motor comprising a motor housing for rotatably supporting and driving an elongated motor shaft and a gearbox fixedly connected to the motor housing. A gearbox housing rotatably supports an input shaft which is splined to the motor shaft for rotation therewith to drive a set of gears. The assembly of the gearbox to the motor is generally accomplished by bolting the gearbox housing to the motor housing. The follow design allows the motor shaft to be axially constrained within the gearbox input shaft allowing the motor shaft to be installed at lower cost and in a less complex manner than previous designs.
SUMMARY OF THE INVENTION
[0004] According to the invention, a motor to gearbox assembly is provided including a motor shaft and an input shaft of the gearbox. The input shaft is coupled to the motor shaft to allow for a quick connection therebetween. Further included is a gearbox housing, the gearbox housing rotatably supports the gearbox input shaft. Also included is at least one attachment means, the attachment means is used to axially constrain the motor shaft to the gearbox input shaft. The attachment means is in contact with a back angle to eliminate axial play between the motor shaft and the gearbox input shaft.
BRIEF DESCRIPTION OF THE DRAWINGS
[0005] Advantages of the present disclosure will be readily appreciated as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings wherein:
[0006] FIG. 1 is a cross-sectional view of the motor shaft to gearbox assembly with an attachment means; and
[0007] FIG. 2 is another cross-sectional side view of the motor shaft to gearbox assembly with an attachment means according to an alternative embodiment.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0008] Referring now to the Figures, the invention will be described with reference to specific embodiments, without limiting the same, wherein like numerals indicate like or corresponding parts throughout the several views.
[0009] Referring to FIGS. 1 and 2, the present invention relates to a motor to gearbox assembly 10 wherein a motor shaft 12 is coupled to a gearbox input shaft 14 by an attachment means 16 to allow for a quick connection therebetween.
[0010] As shown in FIG. 1, the motor shaft 12 of the motor to gearbox assembly 10 is received within an opening 18 of the gearbox input shaft 14. The gearbox input shaft 14 is elongated and hollow and is rotatably supported within a gearbox housing 20 by a plurality of bearings 22. In the depicted embodiment there are three bearings 22 being used in total to support the gearbox input shaft 14. Two of the three bearings 22 are located within the gearbox housing 20 and one of the three bearings 22 is located within a motor housing 24. It is understood that the number and location of the bearings 22 may vary from one embodiment to another. Furthermore the motor shaft 12 is supported deep within a gearbox 26 of the motor to gearbox assembly 10 creating a long span of alignment. [0011] The gearbox input shaft 14 further includes a splined inner surface 30. The splined inner surface 30 of the gearbox input shaft 14 mates with a set of grooves on an outer surface 32 of the motor shaft 12 allowing for translation of rotation therebetween. Rotation is then translated from the gearbox input shaft 14 to a set of helical gears 40. The set of helical gears 40 are part of the gearbox 26 of the motor to gearbox assembly 10. The gearbox 26 is surrounded by the gearbox housing 20. The gearbox housing 20 is bolted to the motor housing 24. The gearbox housing 20 further includes an input seal 42. The input seal 42 seals the gearbox input shaft 14 and the bearings 22 within the gearbox housing 20.
[0012] The motor shaft 12 is aligned with the gearbox input shaft 14 by a pilot fit portion 50 of the motor shaft 12 and a pilot fit portion 52 of the gearbox input shaft 14. The pilot fit portion 50 of the motor shaft 12 and the pilot fit portion 52 of the gearbox input shaft 14 are narrower than the rest of their respective shafts to allow for a constrained and snug fit with one another.
[0013] When the pilot fit portion 50 of the motor shaft 12 is inserted into the pilot fit portion 52 of the gearbox input shaft 14, the two shafts are coupled by the attachment means 16. The attachment means 16 is used to axially constrain the motor shaft 12 to the gearbox input shaft 14. The attachment means 16 fits into a notch 60 formed between the outer surface 32 of the motor shaft 12 and the inner surface 30 of the gearbox input shaft 14. Axial play is eliminated by the contact between the attachment means 16 and a back angle 62 of the motor shaft 12. The back angle 62 of the motor shaft 12 and the size of the attachment means 16 can be engineered in each case for a desired retention result. The use of the attachment means 16 allows for the motor shaft 12 to be installed at a lower cost and in a less complex manner than previous designs.
[0014] Referring to Figure 1, in one embodiment of the invention the attachment means 16 may be a circlip 64. The circlip 64 fits into the notch 60 formed between the outer surface 32 of the motor shaft 12 and the inner surface 30 of the gearbox input shaft 14. The circlip 64 wraps around the outer surface 32 of the motor shaft 12 and contacts with the back angle 62 of the motor shaft 12. [0015] Referring to Figure 2, in an alternative embodiment of the invention the attachment means 16 may be a bolt 68. The bolts 68 extends through a central bore in the motor shaft 12 and is threaded to an inner bore of the gearbox input shaft 14. A bolt head 70 is in contact with end of the motor shaft 12 to axially interconnect the motor shaft 12 and gearbox input shaft 14. It is understood that other attachment means or a combination of attachment means may be used in other embodiments.
[0016] The invention has been described in an illustrative manner, and it is to be understood that the terminology, which has been used, is intended to be in the nature of words of description rather than of limitation. Many modifications and variations of the present invention are possible in light of the above teachings. It is, therefore, to be understood that within the scope of the appended claims, the invention may be practiced other than as specifically described.

Claims

What is claimed is:
1. A motor to gearbox assembly comprising;
a motor shaft,
a gearbox input shaft, the gearbox input shaft is coupled to the motor shaft to allow for a quick connection therebetween,
a gearbox housing, the gearbox housing rotatably supports the gearbox input shaft,
at least one attachment means, the attachment means used to axially constrain the motor shaft to the gearbox input shaft, and
a back angle, contact between the back angle and the attachment means eliminates axial play between the motor shaft and the gearbox input shaft.
2. The motor to gearbox assembly of claim 1, wherein the gearbox input shaft is elongated and hollow.
3. The motor to gearbox assembly of claim 2, wherein the gearbox is surrounded by the gearbox housing and the motor is surrounded by a motor housing.
4. The motor to gearbox assembly of claim 3, wherein the gearbox housing is connected to the motor housing by bolts.
5. The motor to gearbox assembly of claim 4, wherein the gearbox input shaft is rotatably supported within the gearbox housing by a plurality of bearings.
6. The motor to gearbox assembly of claim 5, wherein at least three bearings are used to support the input shaft motor to gearbox assembly.
7. The motor gearbox assembly of claim 6, wherein two of the three bearings are positioned within the gearbox housing and one of the three bearings is positioned within the motor housing.
8. The motor to gearbox assembly of claim 5, wherein the motor shaft is aligned with the input shaft by a pilot fit portion.
9. The motor to gearbox assembly of claim 8, wherein the pilot fit portion of the motor shaft is inserted into a pilot fit portion of the gearbox input shaft.
10. The motor to gearbox assembly of claim 9, wherein the pilot fit portion of the gearbox input shaft is narrower than the rest of the gearbox input shaft.
11. The motor to gearbox assembly of claim 9, wherein the pilot fit portion of the motor shaft is narrower than the rest of the motor shaft.
12. The motor to gearbox assembly of claim 9, wherein the gearbox housing further includes an input seal, the input seal is used to seal the gearbox input shaft and bearings within the gearbox housing.
13. The motor to gearbox assembly of claim 12, wherein the attachment means fits into a notch formed between an outer surface of the motor shaft and an inner surface of the gearbox input shaft, the attachment means is in contact with the back angle.
14. The motor to gearbox assembly of claim 13, wherein the back angle of the motor shaft is engineered in each case for a desired retention result.
15. The motor to gearbox assembly of claim 13, wherein the size of the attachment means used can be engineered in each case in order to achieve a desired retention result.
16. The motor gearbox assembly of claim 13, wherein the motor shaft is supported deep within the gearbox creating a long span of alignment.
17. The motor gearbox assembly of claim 16, wherein the input shaft has a splined inner surface, the splined inner surface mates with a set of grooves on the outer surface of the motor shaft.
18. The motor to gearbox assembly of claim 17, wherein the gearbox input shaft is in contact with a set of helical gears, the helical gears are part of the gearbox of the motor to gearbox assembly.
19. The motor to gearbox assembly of claim 18, wherein the attachment means is a circlip.
20. The motor to gearbox assembly of claim 18, wherein the attachment means is a bolt.
PCT/US2019/058134 2018-10-25 2019-10-25 Motor to gearbox assembly with attachment means WO2020086997A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201862750437P 2018-10-25 2018-10-25
US62/750,437 2018-10-25

Publications (1)

Publication Number Publication Date
WO2020086997A1 true WO2020086997A1 (en) 2020-04-30

Family

ID=68582436

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2019/058134 WO2020086997A1 (en) 2018-10-25 2019-10-25 Motor to gearbox assembly with attachment means

Country Status (1)

Country Link
WO (1) WO2020086997A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112727938A (en) * 2020-12-24 2021-04-30 中国航发控制系统研究所 Flexible transmission device with self-adaptive adjustment and design method thereof
US20220099171A1 (en) * 2019-02-14 2022-03-31 Gkn Automotive Ltd. Drive assembly having an electric drive and transmission

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140295979A1 (en) * 2013-03-26 2014-10-02 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Transmission for an electrically driveable axle of a motor vehicle
WO2016156272A1 (en) * 2015-03-30 2016-10-06 Moteurs Leroy-Somer Connection between a shaft of an electric machine and a reducing gear
DE102015213731A1 (en) * 2015-07-21 2017-01-26 Schaeffler Technologies AG & Co. KG Connecting arrangement comprising two shafts
EP3292619A1 (en) * 2015-05-05 2018-03-14 Moteurs Leroy-Somer Electromechanical assembly comprising an electrical machine coupled to a reduction gear

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140295979A1 (en) * 2013-03-26 2014-10-02 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Transmission for an electrically driveable axle of a motor vehicle
WO2016156272A1 (en) * 2015-03-30 2016-10-06 Moteurs Leroy-Somer Connection between a shaft of an electric machine and a reducing gear
EP3292619A1 (en) * 2015-05-05 2018-03-14 Moteurs Leroy-Somer Electromechanical assembly comprising an electrical machine coupled to a reduction gear
DE102015213731A1 (en) * 2015-07-21 2017-01-26 Schaeffler Technologies AG & Co. KG Connecting arrangement comprising two shafts

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220099171A1 (en) * 2019-02-14 2022-03-31 Gkn Automotive Ltd. Drive assembly having an electric drive and transmission
CN112727938A (en) * 2020-12-24 2021-04-30 中国航发控制系统研究所 Flexible transmission device with self-adaptive adjustment and design method thereof

Similar Documents

Publication Publication Date Title
CN102667193B (en) Bushing for a drive unit and drive unit
US9321478B2 (en) Electric power steering assembly
DE102013011816B4 (en) Transmission with a first and a second housing part
EP3001020A1 (en) Aircraft engine comprising a compressor
WO2020086997A1 (en) Motor to gearbox assembly with attachment means
US20110003661A1 (en) Planetary wheel end assembly
DE102012006790B4 (en) Transmission with a first and a second housing part
KR100609025B1 (en) A differential gear assembly and method for assembling this
JP2019504794A (en) Drive train
CN210526275U (en) Integrated electric drive assembly mechanism
EP1916455A2 (en) Nonrotational torque sensing belt drive
EP2272705B1 (en) Planetary wheel end with piloted sun gear shaft
US20230268794A1 (en) Drive unit for a vehicle
US8689657B2 (en) Axially compact support for a gear within a gearbox
US20100087263A1 (en) Splined couplings
RU2561401C2 (en) Dead cardan joint for helicopter drive
CN110494631A (en) The attachment relay of gas-turbine unit
US11174933B2 (en) Transmission for a motor vehicle
CN105736589A (en) Spline shaft axial locating structure
CN110300864A (en) The axle assembly of gear ring with the entirety with bearing race and integrally formed part
US11543016B2 (en) Drive device for a motor vehicle having a drive unit
CN211139001U (en) Electric drive device
DE102018200569B3 (en) Hybrid drive module for a motor vehicle
JP5278089B2 (en) Pinion shaft structure of final drive unit
WO2017001167A1 (en) Electric power tool

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19805017

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19805017

Country of ref document: EP

Kind code of ref document: A1