EP1200754A1 - Ensemble engrenage d'entrainement - Google Patents

Ensemble engrenage d'entrainement

Info

Publication number
EP1200754A1
EP1200754A1 EP00918574A EP00918574A EP1200754A1 EP 1200754 A1 EP1200754 A1 EP 1200754A1 EP 00918574 A EP00918574 A EP 00918574A EP 00918574 A EP00918574 A EP 00918574A EP 1200754 A1 EP1200754 A1 EP 1200754A1
Authority
EP
European Patent Office
Prior art keywords
drive gear
self
drive
shaft
gear
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.)
Withdrawn
Application number
EP00918574A
Other languages
German (de)
English (en)
Inventor
Robert John Davey
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.)
Engineering Science and Technology Pty Ltd
Original Assignee
Engineering Science and Technology Pty Ltd
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 Engineering Science and Technology Pty Ltd filed Critical Engineering Science and Technology Pty Ltd
Publication of EP1200754A1 publication Critical patent/EP1200754A1/fr
Withdrawn legal-status Critical Current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
    • F16H35/00—Gearings or mechanisms with other special functional features
    • F16H35/06—Gearings designed to allow relative movement between supports thereof without ill effects 
    • 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
    • F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/26—Special means compensating for misalignment of axes

Definitions

  • the present invention relates to a drive gear assembly that can transfer drive from a motor , such as an electric motor, to a mechanical system, such as a grinding mill .
  • motors eg. electric motors
  • a drive gear assembly which includes a drive gear, such as a pinion, and meshing the drive gear with a driven gear, such as a gear wheel, that is connected in some way to the mechanical system.
  • gear teeth of the drive gear be parallel with the gear teeth of the driven gear. More generally, it is necessary for the axes of rotation of the drive gear and the driven gear to be parallel to their axis of generation. It is also desirable that the backlash of the gears be an optimum for the particular gears. If the gears are set with a backlash of zero, ie. positioned such that the teeth mesh fully and are hard up against one another to the fullest extent, the gears generally will not rotate.
  • One known approach for achieving proper alignment is to physically move the motor and/or the drive gear assembly to accurately align the motor shaft and the drive gear assembly in order to achieve close tolerance meshing of the gear teeth.
  • the minimum size of the drive gears is dictated by the size of the internal geared couplings and this often results in significantly larger drive gears than are otherwise required.
  • the particular form of the spherical bearings that can be used in the gear assemblies is generally not a standard off-the-shelf item and, moreover, generally have limited thrust capacity in their current configuration. Furthermore, misalignment of the drive gears and the driven gears that can be accommodated is limited to the allowable angular misalignment of the internal geared couplings and usually this is relatively small .
  • An object of the present invention is to provide an improved sel -aligning drive gear assembly.
  • a drive gear assembly which includes :
  • the self-aligning bearing assembly allows the self-aligning bearing to be moved laterally and/or radially relative to the axis of the drive shaft.
  • the self-aligning bearing supports the drive gear whereby in use of the drive gear assembly:
  • the self-aligning bearing support assembly and the flexible coupling or couplings allow lateral movement of the axis of the drive gear relative to the axis of the driven gear so as to position the drive gear so that it meshes correctly, eg at a selected backlash, with the driven gear.
  • the self-aligning bearing is located so that the geometric centre of the bearing coincides with the point at which the moments of the operating force systems that act on the drive gear and the driven gear are in equilibrium.
  • the drive gear assembly includes a pair of flexible couplings.
  • one of the pair of flexible couplings is coupled to the drive gear and the other of the pair is coupled to the drive shaft .
  • the drive gear assembly includes a telescopic shaft that connects together the flexible couplings .
  • the flexible couplings may be any suitable form of power transmitting coupling that can accept angular misalignment, such as universal joints, constant velocity joints, hookes joints, gear couplings, rubber bush couplings or flexible diaphragm couplings. In fact, any form of power transmitting coupling may be used.
  • the drive gear and the driven gear may be any suitable gears.
  • the drive gear and the driven gear may be gear wheels or friction wheels.
  • the most common embodiment of the invention has the drive gear as a pinion.
  • the driven gear may form part of any suitable system.
  • the mechanical system may be a pinion drive to a grinding mill girth gear.
  • the support assembly for the self- aligning bearing includes:
  • a housing that supports the shaft for movement relative to the axis of the drive shaft .
  • the shaft includes an eccentric lobe which is received in the housing whereby rotation of the shaft in the housing displaces laterally the shaft and the self-aligning bearing carried by the shaft.
  • the embodiments of the drive gear assembly shown in the drawings are arranged to transfer power from a motor 3 to a driven gear 7 of a mechanical system (not shown) .
  • the drive gear assembly (which is drawn without a gear case but may be with a gear case) shown in the figure includes:
  • the drive gear assembly further includes a self- aligning bearing in the form of a spherical bearing 23 that is located axially in the central bore of the drive gear 9 and supports the drive gear 9 for rotary movement, typically 'in the form of a rocking or wobbling motion, around the center of the spherical bearing 23.
  • the spherical bearing 23 is located so that the geometric centre of the spherical bearing 23 coincides with the point at which the moments of the operating force systems that act on the drive gear 9 and the driven gear 7 are in equilibrium. In some cases, the location of this point may be such that the spherical bearing 23 will have to be positioned beyond the extremities of the gear teeth.
  • the drive gear assembly further includes an assembly which supports the spherical bearing 23 and which is in the form of a stub shaft 27 mounted in a housing 25.
  • One end of the stub shaft 27 extends through the central hole 29 in the face plate 13 of the drive gear 9 and carries the spherical bearing 23.
  • the other end of the stub shaft 27 has an eccentric lobe which is located in the housing 25, whereby rotation of the stub shaft 27 in the housing 25 laterally displaces the stub shaft 27, the spherical bearing 23, and the drive gear 9 with respect to the driven gear 7. It is noted that the eccentric lobe may be located in the spherical bearing 23 instead of the housing 25.
  • the drive gear assembly further includes a pair of flexible joints 15 and a telescopic shaft 17 which connect together the joints 15.
  • the left hand joint 15 is connected to a drive shaft 5 of the motor 3 and the right hand joint 15 is connected to the face plate 11 of the drive gear.
  • This arrangement transfers power from the motor 3 to the drive gear 9.
  • this arrangement drives the drive gear 9 causing it to rotate about the center of the spherical bearing 23 and allows lateral movement .
  • the support assembly for the spherical bearing 23 is in the form of a stub shaft 27 that is supported by an "E" bracket 31 that is mounted on a pedestal 35 on the left-hand side of the drive gear as viewed in the drawings.
  • the support assembly for the spherical bearing 23 is in the form of a hollow shaft 33 supported in housings 37 on pedestals 35.
  • the right-hand end of the hollow shaft 33 carries the spherical bearing 23.
  • the hollow shaft 33 includes eccentric lobes 39 that are located in the housings 37, whereby rotation of the hollow shaft 33 laterally displaces the hollow shaft 33.
  • the eccentric lobes 37 may be located within the spherical bearing 23 instead of the bearing housings 37.
  • the telescopic shaft 17 extends through the hollow shaft 33 and a reversed flexible joint 41 is coupled to the end of the telescopic shaft 17 and to the face plate 11 (now on the right-hand face of the drive gear 9 as viewed in Figure 4) of the drive gear and thereby transfers power from the motor 3 to the drive gear (ie. drive gear 9) .
  • This arrangement also accommodates lateral movement of the drive gear.
  • the self-aligning bearing is in the form of a constant velocity joint 43 which is modified to accept externally applied radial and axial forces .
  • the constant velocity joint 43 is mounted on a shaft 53 which is connected to the right-hand side flexible joint 15.
  • the shaft 53 is supported for lateral movement by bearings (not shown) retained in housings 55 on pedestals 35.
  • the drive gear assembly makes it possible to quickly and easily align drive and driven gears with a required backlash for optimum performance.
  • the drive gear assembly makes it possible to achieve alignment to a high degree at initial set-up and to maintain the alignment during operation and this minimises wear on gear teeth.
  • This is a particularly important advantage in many situations.
  • the pinion is generally a quite small diameter gear, with generally less than 30 teeth
  • the driven girth gear is essentially the diameter of the mill shell, which may result anywhere in the order of 200 to 400 teeth.
  • the simple result of this geometry is that girth gears may be up to 8 to 10 times more expensive than pinions. The designer therefore strives to protect the girth gear at the expense of the pinion.
  • the designer Apart from attempting to achieve minimum wear as a result of the quality of the initial alignment, the designer also gives considerable thought to the metallurgy of the girth gear relative to the pinion.
  • the pinion is of a somewhat harder material than the girth gear, the differential being premised on a consensus over wear, especially recognising that there will always be less than perfect alignment in a conventional mill situation. This is not the case with the present invention, where essentially perfect alignment is produced.
  • the designer can contemplate metallurgy which produces harder girth gears and thus less wear in the gears and longer times between replacement, whilst not compromising the overriding imperative of preferentially protecting the more expensive girth gear.
  • the self-aligning bearing may be any conventional "one-piece" commercially available self- aligning bearing such as a spherical roller or self- aligning ball bearing or spherical plain bearing which has inherent thrust capacity that allows the drive gear assembly to be applied to both spur and helical gears, be they single or double external or internal gears. Accordingly, the drive gear assembly can be used in current gear systems.
  • misalignment is now limited to the allowable angular misalignment of the spherical bearing and not to the allowable misalignment of an internal geared coupling and therefore significantly higher angular misalignments can be accommodated.
  • the motor does not require accurate alignment with the drive gear assembly.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gear Transmission (AREA)

Abstract

L'invention concerne un ensemble engrenage d'entraînement qui comprend un roue motrice (9) conçue pour engrener avec une roue menée (7), la roue motrice et la roue menée ayant toutes deux un axe autour duquel les roues peuvent tourner. Un palier à rotule (23) supporte la roue motrice ou la roue menée et lui permet de tourner, généralement avec un mouvement de basculement ou d'oscillation, autour d'un centre du palier, de façon que la roue motrice puisse s'auto-aligner sur la roue menée, ou inversement. Un accouplement flexible (15) est couplé à la roue motrice et, lors de l'utilisation de l'ensemble engrenage d'entraînement, est également couplé, directement ou indirectement, à l'arbre d'entraînement (5) d'un moteur (3), de façon que l'énergie du moteur puisse se transmettre à la roue menée. L'accouplement ou les accouplements flexible(s) permet(tent) que l'axe de la roue motrice soit placé hors de l'alignement de l'axe de l'arbre d'entraînement. Un ensemble (25, 27) supporte le palier à rotule et permet qu'il soit déplacé par rapport à l'axe de l'arbre d'entraînement.
EP00918574A 1999-04-19 2000-04-18 Ensemble engrenage d'entrainement Withdrawn EP1200754A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AUPP981499 1999-04-19
AUPP9814A AUPP981499A0 (en) 1999-04-19 1999-04-19 A drive gear assembly
PCT/AU2000/000332 WO2000063587A1 (fr) 1999-04-19 2000-04-18 Ensemble engrenage d'entrainement

Publications (1)

Publication Number Publication Date
EP1200754A1 true EP1200754A1 (fr) 2002-05-02

Family

ID=3814014

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00918574A Withdrawn EP1200754A1 (fr) 1999-04-19 2000-04-18 Ensemble engrenage d'entrainement

Country Status (3)

Country Link
EP (1) EP1200754A1 (fr)
AU (1) AUPP981499A0 (fr)
WO (1) WO2000063587A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10612635B2 (en) 2017-07-05 2020-04-07 Borealis Technical Limited Wobble gear system

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100595450C (zh) 2004-09-14 2010-03-24 工程科学及技术有限公司 驱动齿轮组件
AU2005284675B2 (en) * 2004-09-14 2012-01-12 Engineering Science & Technology Pty Ltd A drive gear assembly
DE102008039539B4 (de) 2008-08-25 2010-08-26 Polysius Ag Rollenmühle
LU91576B1 (en) * 2009-06-05 2010-12-06 Wurth Paul Sa Device for distributing charge material into a shaft furnace.
LU91577B1 (en) * 2009-06-05 2010-12-06 Wurth Paul Device for distributing charge material in a shaftfurnace.
JP2020534953A (ja) * 2017-09-29 2020-12-03 ロレアル 駆動シャフトカップリング

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3801728C2 (de) * 1988-01-21 1998-07-02 Krupp Polysius Ag Rollenmühle
DE4328477C2 (de) * 1992-08-27 2000-08-10 Dorstener Maschf Ag Antriebsaggregat

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0063587A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10612635B2 (en) 2017-07-05 2020-04-07 Borealis Technical Limited Wobble gear system

Also Published As

Publication number Publication date
AUPP981499A0 (en) 1999-05-13
WO2000063587A1 (fr) 2000-10-26

Similar Documents

Publication Publication Date Title
EP0642636B1 (fr) Configuration d'engrenages
US6048101A (en) Thrust bearing arrangement
US4421187A (en) Transmission with alignable bearing supporting longer power output shaft of differential
EP1286079A2 (fr) Ensemble d'entrainement avec une structure de montage pour une essieu rotative
ZA200702135B (en) A drive gear assembly
US6178884B1 (en) Drive for a rotating component of a rotary printing press
WO2000063587A1 (fr) Ensemble engrenage d'entrainement
JP5602846B2 (ja) シャフト炉中への充填材料分配装置
US4829842A (en) Spur gearing for the driving of a roller shell
US6412623B2 (en) Roller conveyor
US5233247A (en) Precision drive and speed reduction device
US4111065A (en) Roll and roll-driving assembly
US5992782A (en) Tape drive coupling apparatus
GB1567279A (en) Universal joint
JPS63230211A (ja) 圧延機
US20080307912A1 (en) Transmission assembly and straightening machine for same
AU3946400A (en) A drive gear assembly
AU2005284675B2 (en) A drive gear assembly
US7191711B2 (en) Shafting especially a cardan shaft and homokinetic bogie drive system for rail vehicles
JPH0569379A (ja) 平行四辺形リンク機構の誤差補正装置
AU3584193A (en) Steering lower shaft assembly coupling
JP7378600B2 (ja) ホイールドライブシャフト装置
GB2216631A (en) Telescopic universal joint shaft
RU2113298C1 (ru) Шарнир шпинделя прокатного стана
EP0826111B1 (fr) Dispositif de couplage d'un mecanisme d'entrainement rotatif

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20020212

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20030916