GB2027135A - A mounting for an input or output shaft in a gear casing - Google Patents

A mounting for an input or output shaft in a gear casing Download PDF

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Publication number
GB2027135A
GB2027135A GB7924828A GB7924828A GB2027135A GB 2027135 A GB2027135 A GB 2027135A GB 7924828 A GB7924828 A GB 7924828A GB 7924828 A GB7924828 A GB 7924828A GB 2027135 A GB2027135 A GB 2027135A
Authority
GB
United Kingdom
Prior art keywords
outer ring
gear casing
mounting
casing
flange
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Withdrawn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
GB7924828A
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of GB2027135A publication Critical patent/GB2027135A/en
Withdrawn legal-status Critical Current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
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0467—Elements of gearings to be lubricated, cooled or heated
    • F16H57/0469—Bearings or seals
    • 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
    • F16C19/49—Bearings with both balls and rollers
    • F16C19/492—Bearings with both balls and rollers with two or more rows with angular contact
    • F16C19/495—Bearings with both balls and rollers with two or more rows with angular contact with two rows
    • F16C19/497—Bearings with both balls and rollers with two or more rows with angular contact with two rows in O-arrangement
    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • 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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/063—Fixing them on the shaft
    • 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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/067—Fixing them in a housing
    • 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
    • F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
    • F16H1/12—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes
    • F16H1/14—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes comprising conical gears only
    • 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
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/50—Positive connections
    • F16C2226/60—Positive connections with threaded parts, e.g. bolt and nut 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
    • 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
    • F16H—GEARING
    • F16H48/00—Differential gearings
    • F16H48/38—Constructional details
    • F16H48/42—Constructional details characterised by features of the input shafts, e.g. mounting of drive gears thereon
    • F16H2048/423—Constructional details characterised by features of the input shafts, e.g. mounting of drive gears thereon characterised by bearing arrangement

Landscapes

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

Abstract

A mounting for an input or output shaft (1) in a gear casing (2), particularly for a pinion shaft in a passenger-car rear-axle gear casing (2), comprises a bearing unit containing two rows of rolling bodies, two inner rings (5 and 6), and a common outer ring (8) supported radially in a casing bore (9), there being a radial attachment flange (10) formed on the outer ring (8) and fixed to a transverse support surface (12) of the gear casing, (2) which flange (10) alone locates the outer ring (8) axially in relation to the gear casing (2). <IMAGE>

Description

SPECIFICATION A mounting for an input or output shaft in a gear casing This invention relates to a mounting for an input or output shaft in a gear casing, particularly but not exclusively for a pinion shaft in a passenger-car rear-axle gear casing, the mounting having a bearing unit containing two rows of rolling bodies and comprising two inner rings and a common outer ring supported radially in a casing bore.
In one such mounting, disclosed in German Published Application DE-OS 26,07,213, a radial flange on the outer ring is constructed as a supporting flange. At the end remote from the supporting radial flange the outer ring has an external screw-thread for a threaded ring screwed onto the external screwthread. In order to locate the bearing unit axially,-the casing wall adjoining the outer-ring casing bore is clamped between the supporting flange and the screwed ring with interposed washers.
This type of construction is comparatively expensive and suffers from an additional drawback as a result of materials of different thermal expansion being used for the bearing and the gear casing. This may cause the bearing unit to be shifted slightly out of its correct precise location, or it may cause impermissibly high stresses to arise in the pressed-together components.
The invention aims to create a mounting of the construction set out in the opening paragraph of this Specification which does not suffer so greatly from these drawbacks. Using comparatively simple means, it keeps the bearing unit located reliably and accurately in the gear casing even with bearing and gear casing materials whose thermal expansions differ considerably.
Accordingly, the present invention is directed to a mounting in which a radial attachment flange is formed on the outer ring and is fixed to a transverse support surface of the gear casing and in which the radial flange alone locates the outer ring axially in relation to the gear casing.
As a result of such a construction, the outer ring can expand or shrink in the bearing bore without hindrance in the event that considerable thermal fluctuations arise, which would cause the gear casing, for instance one made of light-metal alloy, and the outer ring of the bearing unit to shrink or expand differentially.
If the outer ring has no external screwthread, the overall bearing unit is shortened and, by comparison, cheaper to produce. Only one endface adjoining the bore needs to be machined. To strengthen the bore wall in light-metal gear casings, the bore can, for example, be processed with appropriate tools over its entire length without graduated bearing seats and the like forming an obstruction.
An example of a mounting in accordance with the present invention is illustrated in the accompanying drawing, which shows an axial, part-sectional view of a rear-axle gear assembly of a passenger car in the region of the input pinion.
A bearing unit comprises a combined inclined ball-bearing 3 and a tapered roller-bearing 4. The unit serves for mounting the pinion shaft 1. It has a common outer ring 8, and separate inner rings 5 and 6 of the unit are mutually axially tensioned via an intermediate ring 7. The outer ring 8 is supported radially in a casing bore 9 of a gear casing 2 and is formed with a radial attachment flange 10. The latter is supported on a transverse surface 12 of the gear casing 2 with an appropriate washer 11 interposed between the surface 1 2 and the flange 10, and bolts 14 extending through axial bores 1 3 into screwthreaded holes in the case 2 to secure the ring 8.
The ring 8 of the bearing unit is located solely by this attachment of the flange 10 in the gear casing 2. This allows for differential thermal expansions, because the ring 8 is located axially with respect to the gear casing 2 in only one place.
Instead of attachment by means of bolts 14, it would be possible to effect this by the provision of a screwthread on the attachment flange 10 cooperating with a corresponding screwthread in the casing 2.
Preferably, the attachment flange 10 is provided on the end of the outer ring 8 facing a spur gear in the form of a drive pinion 1 5. Small thermal axial movements of the bearing unit then have less effect on the precise spacing between the drive pinion and the axis of the associated crown-wheel essential for satisfactory tooth meshing. Oil for the bearing unit is supplied through bqres 16 and 17 in a neck 18 of the gear casing 2 and through a bore 1 9 in the outer ring 8.
1. A mounting for an input or output shaft in a gear casing, particularly but not exclusively for a pinion shaft in a passenger-car rear-axle gear casing, the mounting having a bearing unit containing two rows of rolling bodies and comprising two inner rings and a common outer ring supported radially in a casing bore, in which a radial attachment flange is formed on the outer ring and is fixed to a transverse support surface of the gear casing and in which the radial flange alone locates the outer ring axially in relation to the gear casing.
2. A mounting according to ciaim 1, wherein the attachment flange is formed with axially extending bores for attachment bolts.
3. A mounting according to claim 1 for a
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (4)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION A mounting for an input or output shaft in a gear casing This invention relates to a mounting for an input or output shaft in a gear casing, particularly but not exclusively for a pinion shaft in a passenger-car rear-axle gear casing, the mounting having a bearing unit containing two rows of rolling bodies and comprising two inner rings and a common outer ring supported radially in a casing bore. In one such mounting, disclosed in German Published Application DE-OS 26,07,213, a radial flange on the outer ring is constructed as a supporting flange. At the end remote from the supporting radial flange the outer ring has an external screw-thread for a threaded ring screwed onto the external screwthread. In order to locate the bearing unit axially,-the casing wall adjoining the outer-ring casing bore is clamped between the supporting flange and the screwed ring with interposed washers. This type of construction is comparatively expensive and suffers from an additional drawback as a result of materials of different thermal expansion being used for the bearing and the gear casing. This may cause the bearing unit to be shifted slightly out of its correct precise location, or it may cause impermissibly high stresses to arise in the pressed-together components. The invention aims to create a mounting of the construction set out in the opening paragraph of this Specification which does not suffer so greatly from these drawbacks. Using comparatively simple means, it keeps the bearing unit located reliably and accurately in the gear casing even with bearing and gear casing materials whose thermal expansions differ considerably. Accordingly, the present invention is directed to a mounting in which a radial attachment flange is formed on the outer ring and is fixed to a transverse support surface of the gear casing and in which the radial flange alone locates the outer ring axially in relation to the gear casing. As a result of such a construction, the outer ring can expand or shrink in the bearing bore without hindrance in the event that considerable thermal fluctuations arise, which would cause the gear casing, for instance one made of light-metal alloy, and the outer ring of the bearing unit to shrink or expand differentially. If the outer ring has no external screwthread, the overall bearing unit is shortened and, by comparison, cheaper to produce. Only one endface adjoining the bore needs to be machined. To strengthen the bore wall in light-metal gear casings, the bore can, for example, be processed with appropriate tools over its entire length without graduated bearing seats and the like forming an obstruction. An example of a mounting in accordance with the present invention is illustrated in the accompanying drawing, which shows an axial, part-sectional view of a rear-axle gear assembly of a passenger car in the region of the input pinion. A bearing unit comprises a combined inclined ball-bearing 3 and a tapered roller-bearing 4. The unit serves for mounting the pinion shaft 1. It has a common outer ring 8, and separate inner rings 5 and 6 of the unit are mutually axially tensioned via an intermediate ring 7. The outer ring 8 is supported radially in a casing bore 9 of a gear casing 2 and is formed with a radial attachment flange 10. The latter is supported on a transverse surface 12 of the gear casing 2 with an appropriate washer 11 interposed between the surface 1 2 and the flange 10, and bolts 14 extending through axial bores 1 3 into screwthreaded holes in the case 2 to secure the ring 8. The ring 8 of the bearing unit is located solely by this attachment of the flange 10 in the gear casing 2. This allows for differential thermal expansions, because the ring 8 is located axially with respect to the gear casing 2 in only one place. Instead of attachment by means of bolts 14, it would be possible to effect this by the provision of a screwthread on the attachment flange 10 cooperating with a corresponding screwthread in the casing 2. Preferably, the attachment flange 10 is provided on the end of the outer ring 8 facing a spur gear in the form of a drive pinion 1 5. Small thermal axial movements of the bearing unit then have less effect on the precise spacing between the drive pinion and the axis of the associated crown-wheel essential for satisfactory tooth meshing. Oil for the bearing unit is supplied through bqres 16 and 17 in a neck 18 of the gear casing 2 and through a bore 1 9 in the outer ring 8. CLAIMS
1. A mounting for an input or output shaft in a gear casing, particularly but not exclusively for a pinion shaft in a passenger-car rear-axle gear casing, the mounting having a bearing unit containing two rows of rolling bodies and comprising two inner rings and a common outer ring supported radially in a casing bore, in which a radial attachment flange is formed on the outer ring and is fixed to a transverse support surface of the gear casing and in which the radial flange alone locates the outer ring axially in relation to the gear casing.
2. A mounting according to ciaim 1, wherein the attachment flange is formed with axially extending bores for attachment bolts.
3. A mounting according to claim 1 for a gearing shaft with a spur gear, wherein the attachment flange is provided on an end of the outer ring facing the spur gear.
4. A mounting for an input or output shaft in a gear casing, substantially as described herein with reference to the accompanying drawing.
GB7924828A 1978-07-29 1979-07-17 A mounting for an input or output shaft in a gear casing Withdrawn GB2027135A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782833362 DE2833362A1 (en) 1978-07-29 1978-07-29 STORAGE OF AN INPUT OR OUTPUT SHAFT IN A TRANSMISSION HOUSING, IN PARTICULAR A PINION SHAFT IN A REAR AXLE TRANSMISSION CASING OF PERSONAL VEHICLES

Publications (1)

Publication Number Publication Date
GB2027135A true GB2027135A (en) 1980-02-13

Family

ID=6045726

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7924828A Withdrawn GB2027135A (en) 1978-07-29 1979-07-17 A mounting for an input or output shaft in a gear casing

Country Status (5)

Country Link
JP (1) JPS5520995A (en)
DE (1) DE2833362A1 (en)
FR (1) FR2432114A1 (en)
GB (1) GB2027135A (en)
IT (1) IT7924648A0 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2475166A1 (en) * 1980-02-06 1981-08-07 Skf Kugellagerfabriken Gmbh ASSEMBLY OF THE SHAFT OF A MACHINE ELEMENT, PARTICULARLY A PINION SHAFT, OF A TRANSMISSION MECHANISM
US4770601A (en) * 1982-01-07 1988-09-13 Crisafulli Pump Company, Inc. Pump shaft bearing protection system
GB2241994A (en) * 1990-03-13 1991-09-18 Skf Gmbh A mounting assembly for a shaft
US6293704B1 (en) * 2000-03-21 2001-09-25 The Timken Company Shaft mounting with enhanced stability
WO2003046416A1 (en) * 2001-11-28 2003-06-05 Toyota Jidosha Kabushiki Kaisha Bevel gear transmission
US7175350B2 (en) 2004-03-17 2007-02-13 The Timken Company Thermally compensated bearing system
US20110172053A1 (en) * 2010-01-13 2011-07-14 Apex Dynamics, Inc. Planet-gear speed reducer
TWI395894B (en) * 2009-12-22 2013-05-11 Apex Dynamics Inc Planetary reducer
DE102011088481A1 (en) * 2011-12-05 2013-06-27 Schaeffler Technologies AG & Co. KG Storage and connection design combination, has terminal construction that enables direct pairing of shoulder of terminal contraction and shoulder of outer bearing ring in press-fit manner, and channel connected with pressure oil line
EP3001051A1 (en) * 2014-09-29 2016-03-30 Aktiebolaget SKF Bearing unit for pinions

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60133892U (en) * 1984-02-14 1985-09-06 極東開発工業株式会社 Slide-shu mounting structure for telescopic boom
IT8520421V0 (en) * 1985-01-08 1985-01-08 Comer Spa KINEMATIC TRANSMISSION UNIT WITH ANGULAR TRANSMISSION, PARTICULARLY FOR AGRICULTURAL MACHINES.
DE19808566C1 (en) * 1998-02-28 1999-07-15 Daimler Chrysler Ag Shaft bearing for axle drive of motor vehicle
EP1693581B1 (en) * 2003-12-11 2010-08-25 JTEKT Corporation Bearing device for supporting pinion shaft
DE10359643A1 (en) * 2003-12-18 2005-07-28 Fag Kugelfischer Ag Outer ring of a wheel bearing
US7178424B2 (en) * 2004-12-06 2007-02-20 American Axle & Manufacturing, Inc. Pinion unit in axle assembly
JP2010216591A (en) * 2009-03-17 2010-09-30 Sumitomo Heavy Ind Ltd Reduction gear
JP2013036596A (en) * 2011-08-11 2013-02-21 Ntn Corp Tapered roller bearing and mounting structure therefor
DE102011082014A1 (en) * 2011-09-01 2013-03-07 Schaeffler Technologies AG & Co. KG Pinion shaft bearing arrangement
FR3004774A1 (en) * 2013-04-19 2014-10-24 Getinge La Calhene COMBINING GEAR DEVICE

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2475166A1 (en) * 1980-02-06 1981-08-07 Skf Kugellagerfabriken Gmbh ASSEMBLY OF THE SHAFT OF A MACHINE ELEMENT, PARTICULARLY A PINION SHAFT, OF A TRANSMISSION MECHANISM
US4770601A (en) * 1982-01-07 1988-09-13 Crisafulli Pump Company, Inc. Pump shaft bearing protection system
GB2241994A (en) * 1990-03-13 1991-09-18 Skf Gmbh A mounting assembly for a shaft
FR2659704A1 (en) * 1990-03-13 1991-09-20 Skf Gmbh MOUNTING OF THE BEARING OF A SHAFT CARRYING A PINION INSIDE A CRANKCASE.
GB2241994B (en) * 1990-03-13 1994-10-12 Skf Gmbh A mounting assembly for a shaft
WO2001071206A1 (en) * 2000-03-21 2001-09-27 The Timken Company Shaft mounting with enhanced stability
US6293704B1 (en) * 2000-03-21 2001-09-25 The Timken Company Shaft mounting with enhanced stability
WO2003046416A1 (en) * 2001-11-28 2003-06-05 Toyota Jidosha Kabushiki Kaisha Bevel gear transmission
US7175350B2 (en) 2004-03-17 2007-02-13 The Timken Company Thermally compensated bearing system
TWI395894B (en) * 2009-12-22 2013-05-11 Apex Dynamics Inc Planetary reducer
US20110172053A1 (en) * 2010-01-13 2011-07-14 Apex Dynamics, Inc. Planet-gear speed reducer
DE102011088481A1 (en) * 2011-12-05 2013-06-27 Schaeffler Technologies AG & Co. KG Storage and connection design combination, has terminal construction that enables direct pairing of shoulder of terminal contraction and shoulder of outer bearing ring in press-fit manner, and channel connected with pressure oil line
EP3001051A1 (en) * 2014-09-29 2016-03-30 Aktiebolaget SKF Bearing unit for pinions

Also Published As

Publication number Publication date
IT7924648A0 (en) 1979-07-25
JPS5520995A (en) 1980-02-14
FR2432114A1 (en) 1980-02-22
DE2833362A1 (en) 1980-02-07

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)