GB2297366A - Gearbox has gearwheels mounted in separate bearing plate isolated to avoid sound transmission to casing - Google Patents

Gearbox has gearwheels mounted in separate bearing plate isolated to avoid sound transmission to casing Download PDF

Info

Publication number
GB2297366A
GB2297366A GB9601195A GB9601195A GB2297366A GB 2297366 A GB2297366 A GB 2297366A GB 9601195 A GB9601195 A GB 9601195A GB 9601195 A GB9601195 A GB 9601195A GB 2297366 A GB2297366 A GB 2297366A
Authority
GB
United Kingdom
Prior art keywords
gearbox
bearing plate
gearwheels
casing
gearbox casing
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.)
Granted
Application number
GB9601195A
Other versions
GB9601195D0 (en
GB2297366B (en
Inventor
Hans-Gerd Eckel
Eugen Lauster
Jochen Tasche
Udo Wolz
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.)
Carl Freudenberg KG
ZF Friedrichshafen AG
Original Assignee
Carl Freudenberg KG
ZF Friedrichshafen 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 Carl Freudenberg KG, ZF Friedrichshafen AG filed Critical Carl Freudenberg KG
Publication of GB9601195D0 publication Critical patent/GB9601195D0/en
Publication of GB2297366A publication Critical patent/GB2297366A/en
Application granted granted Critical
Publication of GB2297366B publication Critical patent/GB2297366B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/028—Gearboxes; Mounting gearing therein characterised by means for reducing vibration or noise
    • 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
    • F16H57/0006—Vibration-damping or noise reducing means specially adapted 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
    • F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings

Description

2297366 Gearbox The present invention relates to a gearbox comprising a
gearbox casing in which there are arranged at least two gearwheels which are capable of relative rotation and are in 5 engagement with one another.
A gearbox of this kind is known. Here, the vibrations caused by the interengagement of the gearwheels are transmitted essentially undiminished to the gearbox casing and radiated from the latter. From an acoustic point of view, this is far from satisfactory.
The present invention seeks to make a further development of a gearbox of this kind in such a way that the emission of noise to the surroundings is reduced.
According to the invention there is provided a gearbox comprising a gearbox casing in which there are arranged at least two gearwheels which are capable of relative rotation and are in engagement with one another, characterised in that the gearwheels are supported at at least one end in a common bearing plate, and in that, to reduce the introduction of sound into the gearbox casing, the bearing plate is separated from the gearbox casing by a flexible spring ring made of polymeric material. In gearboxes according to the invention, the acoustic vibrations caused by the interengagement of the gearwheels are transmitted to the gearbox casing with considerable diminution and are radiated by the latter to the surroundings to a significantly reduced degree.
Irrespective of this, the relative position of the interengaging gearwheels is precisely fixed. In terms of mechanical service properties and, in particular, in terms of endurance, gearboxes according to the invention are no different from hitherto known gearboxes.
The gearwheels can be mounted in the bearing plate either by means of an integrally formed shaft or by means of a shaft which is produced separately from the gearwheels and is inserted in them at a later stage. In both designs, acoustic vibrations from the gearwheels are transmitted to the mounting during normal use. Any transmission of the acoustic vibrations beyond this point is considerably reduced by the characterising features of the - invention. The characterising features of the invention therefore lead to a highly satisfactory outcome in both designs.
Because, in gearboxes according to the invention, the gearbox casing no longer vibrates to such a great extent due to structure-borne noise and because less attention has to be paid to acoustic design, it is possible to optimize the shape-dependent strength properties and the weight of the casing even further.
A significant improvement in acoustic effectiveness can be achieved when the gearwheels are supported at both ends in common bearing plates and are insulated acoustically from the gearbox casing at both ends by flexible spring rings made of polymeric material. Given such a design, it is not possible for acoustic vibrations to reach the gearbox casing, even by a circuitous route. Desirably, the gearbox casing is insulated acoustically from the gearwheels at each mounting point of the gearwheels by a flexible spring ring made of polymeric materials.
A worthwhile simplification from an assembly point of view is achieved if the spring ring is arranged in a gap between the bearing plate and a holding part which can be bolted to the gearbox casing. In such designs, there is no change in relation to hitherto conventional gearboxes as regards any disassembly operations which may be required.
It has proved to be advantageous if the spring ring is composed of elastomeric material and is connected to the 3 - bearing plate and the holding part by being directly vulcanized on. On the one hand, vulcanizing it on directly ensures a permanent, fluid-tight joint between the bearing plate and the holding part. On the other hand, spring rings made of elastomeric material provide an excellent guarantee of good, long- term vibration insulation between the bearing plate and the gearbox casing.
The invention is further illustrated below with reference to the accompanying drawings, in which:
Fig. 1 shows a gearbox according to the invention in front elevation, and Fig. 2 shows the gearbox of Fig. 1 in partial longitudinal section.
The gearbox shown in Figs. 1 and 2 comprises a gearbox casing 1 in which there are arranged at least two gearwheels 4, 5 which are capable of relative rotation and are in engagement with one another. The gearwheels 4, 5 are mounted on shafts 2, 3 supported at both ends in common bearing plates 6, of which the f ront one can be seen. To reduce the introduction of sound into the gearbox casing 1, this front bearing plate 6 is separated from the gearbox casing 1 by a flexible spring ring 8 made of soft rubber. The spring ring 8 is arranged in a gap between the bearing plate 6 and a holding part 7 which is bolted to the gearbox casing 1, the spring ring 8 being connected to the bearing plate 6 and the holding part 7 by being directly vulcanised on bearing plate 6. As a result, acoustic vibrations caused by the mutual engagement of the teeth of the gearwheels 4, 5 can no longer be transmitted to the gearbox casing 1 and radiated by the latter to the surroundings.

Claims (5)

Claims
1. A gearbox comprising a gearbox casing (1) in which there are arranged at least two gearwheels (4, 5) which are capable of relative rotation and are in engagement with one another, characterized in that the gearwheels (4, 5) are supported at at least one end in a common bearing plate (6), and in that, to reduce the introduction of sound into the gearbox casing (1), the bearing plate (6) is separated from the gearbox casing (1) by a flexible spring ring (8) made of 10 polymeric material.
2. A gearbox according to claim 1, characterized in that the gearwheels (4, 5) are supported at both ends in common bearing plates (6) and are insulated acoustically from the gearbox casing (1) at both ends by flexible spring 15 rings (8) made of polymeric material.
3. A gearbox according to either of claims 1 and 2, characterized in that the or each spring ring (8) is arranged in a gap between the bearing plate (6) and a holding part (7) which can be bolted to the gearbox casing (1).
4. A gearbox according to any of claims 1 to 3, characterized in that the or each spring ring (8) is composed of elastomeric material and is connected to the bearing plate (6) and/or the holding part (7) by being 25 directly vulcanized on.
5. A gear box substantially as hereinbefore described with reference to or as illustrated in the accompanying drawings.
GB9601195A 1995-01-27 1996-01-22 Gearbox Expired - Fee Related GB2297366B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1995102560 DE19502560A1 (en) 1995-01-27 1995-01-27 transmission

Publications (3)

Publication Number Publication Date
GB9601195D0 GB9601195D0 (en) 1996-03-20
GB2297366A true GB2297366A (en) 1996-07-31
GB2297366B GB2297366B (en) 1998-05-13

Family

ID=7752464

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9601195A Expired - Fee Related GB2297366B (en) 1995-01-27 1996-01-22 Gearbox

Country Status (2)

Country Link
DE (1) DE19502560A1 (en)
GB (1) GB2297366B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10230861A1 (en) * 2002-07-09 2004-01-22 Zf Friedrichshafen Ag Shift gear, especially an automatic shift gear, for a motor vehicle has a planet design with a ring gear as the driven element, and a device for damping structure-borne noise flowing from the ring gear to a driven shaft
DE102006002628A1 (en) * 2006-01-19 2007-08-02 Zf Friedrichshafen Ag Housing for gearing, plant or vehicle has its own material and further material integrated as at least one form element into housing for noise reduction or transmission of force and/or torque
US20100120575A1 (en) * 2007-02-08 2010-05-13 Zf Friedrichshafen Ag Transmission
US8262538B2 (en) 2007-02-03 2012-09-11 Zf Friedrichshafen Ag Transmission device and method for operating a transmission device

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10250733B4 (en) * 2001-11-16 2006-01-26 Daimlerchrysler Ag Transmission with a bearing unit
DE10343992A1 (en) * 2003-09-23 2005-04-14 Zf Friedrichshafen Ag Bearing plate for drive systems with two or more shafts has apertures for mounting shafts, in which anti-friction bearings are mounted, plate being made up of two sections fastened together by bolts or pins
DE102012202247A1 (en) * 2012-02-15 2013-08-22 Zf Friedrichshafen Ag Bearing arrangement for supporting shaft in bore of transmission housing wall in car, has damping device including radial inner and outer sleeves, where sleeves are integrally connected to each other via elastomeric damping element
DE102013220409A1 (en) * 2013-10-10 2015-04-16 Zf Friedrichshafen Ag Fastening device, selector housing, power transmission element, switching device and method for attaching a switching device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5020923A (en) * 1987-11-04 1991-06-04 Sundstrand Corporation Transmission/gearbox vibration damping system
GB2254898A (en) * 1991-04-15 1992-10-21 Kubota Kk Vibration and noise proofing system for a hydrostatic stepless transmission attached to a transmission case

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB814724A (en) * 1955-07-07 1959-06-10 Vickers Electrical Co Ltd Improvements relating to reduction of vibration transmission from mechanical machines, assemblies and apparatus
DE2053523A1 (en) * 1970-10-31 1972-05-04 Schottel - Werft, Josef Becker KG, 5401 Spay Gear drive running with crossed axes

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5020923A (en) * 1987-11-04 1991-06-04 Sundstrand Corporation Transmission/gearbox vibration damping system
GB2254898A (en) * 1991-04-15 1992-10-21 Kubota Kk Vibration and noise proofing system for a hydrostatic stepless transmission attached to a transmission case

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10230861A1 (en) * 2002-07-09 2004-01-22 Zf Friedrichshafen Ag Shift gear, especially an automatic shift gear, for a motor vehicle has a planet design with a ring gear as the driven element, and a device for damping structure-borne noise flowing from the ring gear to a driven shaft
DE102006002628A1 (en) * 2006-01-19 2007-08-02 Zf Friedrichshafen Ag Housing for gearing, plant or vehicle has its own material and further material integrated as at least one form element into housing for noise reduction or transmission of force and/or torque
US8262538B2 (en) 2007-02-03 2012-09-11 Zf Friedrichshafen Ag Transmission device and method for operating a transmission device
US20100120575A1 (en) * 2007-02-08 2010-05-13 Zf Friedrichshafen Ag Transmission

Also Published As

Publication number Publication date
DE19502560A1 (en) 1996-08-08
GB9601195D0 (en) 1996-03-20
GB2297366B (en) 1998-05-13

Similar Documents

Publication Publication Date Title
US5050446A (en) Vibration and torsional damping coupling for a power transmission
US4781659A (en) Torsional vibration damper with a V-belt pulley connected thereto
BR0105403A (en) Clutch aggregate
US6312340B1 (en) Hollow drive shaft with integrated vibration absorber
US5904622A (en) Driveshaft assembly with vented noise reduction structure
JP2903216B2 (en) Torsion damping device
GB2297366A (en) Gearbox has gearwheels mounted in separate bearing plate isolated to avoid sound transmission to casing
EP0890039A1 (en) Mechanical coupling for elastic axial and radial constraint with torsional freedom, especially for elastic pivots and suspensions and the like
US7178423B2 (en) Noise and vibration damper for a vehicular driveshaft assembly
US4690238A (en) Four-wheel drive arrangement for motor vehicles
WO1989002541A1 (en) Noise absorber for drive shafts
EP1442911A3 (en) Frame structure of a vehicle
JPH04341617A (en) Steering coupling
US5467664A (en) Noise abating vehicle transmission shift lever
EP1564059B1 (en) Engine to transmission coupler
EP0389681A2 (en) Damper unit for automotive power unit or the like
JPS6181826A (en) Vibration isolator for clutch control system
JP4478881B2 (en) Reciprocating piston
JP3047234B2 (en) Clutch combination consisting of compensation clutch and torsion elastic clutch
GB2126690A (en) Flexible coupling
ATE219557T1 (en) ELASTOMER COUPLING WITH COMPOSITE BLOCK
ATE239181T1 (en) ELASTIC SHAFT COUPLING WITH TORSION ELEMENT
US5509495A (en) Drive assembly for motor vehicles
JP2005088795A (en) Driving mechanism installing structure of a/t vehicle
GB2298260A (en) Vibration-damping link

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20000122