GB2189854A - Drive unit for a motor vehicle having separate output casing compartment with cover - Google Patents

Drive unit for a motor vehicle having separate output casing compartment with cover Download PDF

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Publication number
GB2189854A
GB2189854A GB08708205A GB8708205A GB2189854A GB 2189854 A GB2189854 A GB 2189854A GB 08708205 A GB08708205 A GB 08708205A GB 8708205 A GB8708205 A GB 8708205A GB 2189854 A GB2189854 A GB 2189854A
Authority
GB
United Kingdom
Prior art keywords
shaft
drive
compartment
hollow
drive unit
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Withdrawn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
GB08708205A
Other versions
GB8708205D0 (en
Inventor
Eugen Svab
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.)
Ford Motor Co
Original Assignee
Ford Motor Co
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 Ford Motor Co filed Critical Ford Motor Co
Publication of GB8708205D0 publication Critical patent/GB8708205D0/en
Publication of GB2189854A publication Critical patent/GB2189854A/en
Withdrawn legal-status Critical Current

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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
    • F16H47/00—Combinations of mechanical gearing with fluid clutches or fluid gearing
    • F16H47/06—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the hydrokinetic type
    • F16H47/065—Combinations of mechanical gearing with fluid clutches or fluid gearing the fluid gearing being of the hydrokinetic type the mechanical gearing being of the friction or endless flexible member type
    • 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
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/06—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing
    • 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
    • F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
    • F16H37/02—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings
    • F16H37/021—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings toothed gearing combined with continuous variable friction gearing
    • F16H37/022—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00 comprising essentially only toothed or friction gearings toothed gearing combined with continuous variable friction gearing the toothed gearing having orbital motion

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Retarders (AREA)
  • Arrangement And Driving Of Transmission Devices (AREA)

Abstract

The casing 1 defines a main compartment 4 containing elements of a change speed transmission of which the output element is a hollow shaft 20 and having an output drive shaft 30 passing through the hollow shaft 20. The output drive shaft 30 is coupled to the hollow shaft 20 through a step down planetary gearing 23 disposed within a compartment 9 separate from the main compartment 4 and having an opening covered by a cover 26 which is separate from the casing of the main compartment 4. By alteration only of the cover 26 and the contents of the compartment 9 it is possible to use the same basic drive unit for front wheel drive, rear wheel drive or four wheel drive vehicles. The drive unit preferably comprises a torque converter (7), a V-belt expanding pulley CVT (5) driven via a forward/reverse planetary gearing (13), stepdown planetary gearing (23) and an output differential (27). The carrier of the stepdown planetary gearing may be connected directly to an output shaft for a rear wheel drive configuration, or may be connected to a planetary differential gearing viscous clutch arrangement for four wheel drive, one of the output shafts driving an output coaxial with the torque converter via a chain drive. <IMAGE>

Description

SPECIFICATION Drive unit for a motor vehicle The invention relates to a drive unit for a motor vehicle.
The preferred embodiments of the invention are concerned with drive units of the type having a hydrokinetic torque converter connected to be driven by an engine and fitted with a lock-up clutch, wherein the turbine shaft of the converter extends through a hollow primary shaft of a continuously variable belt-drive transmission and is connected to the input member of a forward-gear/reversegear change-speed planet gear system disposed at the end of the drive unit remote from the torque converter and having an output member connected to drive the hollow primary shaft, and wherein the hollow primary shaft is connected by a traction belt to a hollow secondary shaft serving to drive the input member of a step-down planet gear system which is disposed in a laterally open casing part and has a ring gear secured in the casing and an output member which drives at least one output drive shaft which extends through the hollow secondary shaft.
A drive unit of this generaly type for a motor vehicle is already known from DE-OS 29 48 195. In this case, the connection between the secondary hollow shaft and the two output shafts is by means of a differential bevel gearing.
This known drive unit has the disadvantage that on account of the design of its casing it is intended for only one type of application, namely for use in a motor vehicle with a tranversely mounted engine and driven front wheels.
Similar drive units for motor vehicles are known from DE-OS 30 40 994, in which in various embodiments different arrangements of the hydrokinetic torque converted, of the continuously variable belt-driven transmission and of the forward/reverse-gear change-speed planet gear system and of a step-down planet gear system are disclosed.
A drive unit for motor vehicles of the same general type is also known from DE-GM (Utility model) 80 14 768, in which the arrangement of the various transmission elements is similar, but in which the design of the casing is again such that the drive unit can be used for only one type of application, namely for a motor vehicle with a transversely mounted driving engine and driven front wheels or rear wheels.
The present invention seeks to provide a drive unit for a motor vehicle which is more versatile in that the same basic drive which can be used with minor modification to suit vehicles with transversely mounted engines, vehicles with longitudinally mounted engines driving the rear wheels through a propeller shaft, or four wheel drive vehicles.
According to the present invention in its general aspect, there is provided a drive unit for a motor vehicle comprising a casing defining a main compartment containing elements of a change speed transmission of which the output element is a hollow shaft and having an output drive shaft passing through the hollow shaft and coupled to the hollow shaft at an end of the hollow shaft disposed within a compartment separate from the main compartment and having an opening covered by a cover which is separate from the casing of the main compartment.
In accordance with a second aspect of the invention, there is provided a drive unit for a motor vehicle having a hydrokinetic torque converter connected to be driven by an engine and fitted with a lock-up clutch, wherein the turbine shaft of of the converter extends through a hollow primary shaft of a continuously variable belt-drive transmission and is connected to the input member of a forwardgear/reverse-gear change-speed planet gear system disposed at the end of the drive unit remote from the torque converter and having an output member connected to drive the hollow primary shaft, and wherein the hollow primary shaft is connected by a traction belt to a hollow secondary shaft serving to drive the input member of a step-down planet gear system which is disposed in a laterally open casing part and has a ring gear secured in the casing and an output member which drives at least one output drive shaft which extends through the hollow secondary shaft; characterised in that the step-down planet gear system is mounted in a cantilevered manner in the laterally open casing part and in that the planet gear carrier of the planet gear system serves as a connecting element for coupling the hollow secondary shaft to the output drive shaft(s).
By virtue of the fact that the basic drive unit comprises only specific gearing element(s) in the gearbox casing and the step-down planet gear system is mounted in a cantilevered manner in a laterally open space of the gearbox casing part and the planet gear carrier of the step-down planet gear system is constructed as a connecting element, the basic drive unit can be modified by combining it with different connecting elements and different flanged-on casing parts without major structural outlay in such a way that the drive unit can be used for different types of application.
The invention will now be described further, by way of example, with reference to the accompanying drawings, in which: Figure 1 is schematic diagram of the basic drive unit with the parts of the basic gearbox casing drawn in thicker lines for emphasis and the flanged-on casing part indicated in thinner lines, the drive unit being intended for a vehicle with a transversely mounted engine driving the front wheels, Figure 2 is a similar diagram of a drive unit of a second embodiment of the invention intended for a vehicle with a longitudinally mounted engine driving the rear axle differential through a propeller shaft, and Figure 3 is a similar diagram of a further embodiment intended for a four wheel drive vehicle and incorporating a differential fitted with a viscous clutch to limit slip.
The drive unit 1 in Fig. 1 comprises two main gearbox casing parts 2 and 3, which when joined together form a main compartment 4 for a continously variable belt-drive transmission 5. The gearbox casing part 2 forms a first receiving compartment 6 for the hydrokinetic torque converter 7 with the lockup clutch 8 and a laterally open separate gearbox compartment 9 which will be described below. The gearbox casing part 3 forms a compartment 10 for receiving a forward-gear/ reverse-gear change-speed planet gear system 11, with which is associated a forward-gear clutch 12 and a reverse-gear clutch 13 and which is closed by a gearbox cover 14.
Drive from the torque converter 7 is transmitted through the turbine shaft 15 and the planet gear system 11, to the hollow primary shaft 16 of the belt-drive transmission 5. The primary shaft 16 comprises in conventional manner a stationary cone sheave 17, opposite which is disposed an axially displaceable cone sheave 18 which is displaceable by way of cylinder/piston units acted upon by pressure medium.
The primary shaft 16 drives, by way of the traction belt 19, the secondary shaft 20 of the transmission 5, which secondary shaft is like-wise constructed in the form of a hollow shaft and also comprises a stationary cone sheave 21 and an axially displaceable cone sheave 22 which can be moved axially by way of cylinder/piston units acted upon by pressure medium.
The secondary shaft 20 drives the input member, that is to say the sun wheel, of a step-down planet gear system 23, the ring gear 24 of which is secured in the laterally open compartment 9 of the gearbox casing part 2 and the planet gear carrier 25 of which forms a drive element to couple the hollow secondary shaft 20 to a drive shaft 30 which extends through the hollow secondary shaft 20.
In the case of the embodiment illustrated in Fig. 1 the laterally open compartment 9 of the gearbox housing part 2 is closed by a flanged cover 26 within which is disposed a bevel wheel differential gearing 27 of which the crown wheel 28 is driven by the planet gear carrier 25 of the step-down planet gear system 23.
In this connection the bevel wheel differential gearing unit 27 drives laterally extending drive shafts 29 and 30, the drive shaft 30 extending through the hollow secondary shaft 20 and the other drive shaft 29 extending through the cover 26 of the compartment 9.
Because the basic drive unit is the same in all the drawings, it will not be described again and reference numerals have been omitted from Figs. 2 and 3 in respect of elements of the drive unit which have been previously described.
In the case of the embodiment illustrated in Fig. 2, the step-down planet gear system 23 disposed in the compartment 9 of the gearbox casing part 2 is again arranged in the same manner, with the planet gear carrier 25 of the step-down planet gear system 23 driving the drive shaft 32. In this case, the connection to the drive shaft is by way of a connecting spider 31 and the drive shaft 32 is intended to drive a conventional rear-axle differential unit by way of a propeller shaft having universal joints. The compartment 9 in the gearbox casing part 2 is in this case closed by a simple cover 33.
In the case of the embodiment illustrated in Fig. 3, the step-down planet gear system 23 is again disposed in the compartment 9 of the gearbox casing part 2. In this case, the compartment 9 is closed off by an additional gearbox casing cover 34, in which a planet gear system 35, acting as a torque divider to split the power between the front and rear wheels, and a viscous clutch unit 36 are arranged. The input member of the differential planet gear system 35 is coupled for rotation with the planet gear carrier of the step-down planet gear system 23 by way of a collar 37. The two output elements, namely the sun wheel and the ring gear of the differential planet gear system 35 are connected to drive the separate drive shafts 38 and 39, of which the drive shaft 39 extends through the hollow secondary shaft 20 and the drive shaft 38 passes through the cover 34..
In this embodiment, the drive shaft 38 can drive a front-axle differential drive unit by way of a propeller shaft in conventional manner and the drive shaft 39 can drive a conventional rear-axle differential drive unit by way of a further propeller shaft, as a result of which the basic drive unit can be used, for example, for a light commerical vehicle with four-wheel drive.
In the case of a basic drive unit in Figs. 2 and 3, the drive shafts 32 or 39 respectively can of course be connected by way of a chain-and-sprocket-wheel drive 41 disposed in a further flanged casing part 40 to a drive shaft 45 extending in the longitudinal median plane of the vehicle for a differential rear-axle unit, if the central arrangement of the drive shaft is required. This embodiment is indicated in Fig. 3 by dash-dot lines.

Claims (10)

1. A drive unit for a motor vehicle com prising a casing defining a main compartment containing elements of a change speed transmission of which the output element is a hollow shaft and having an output drive shaft passing through the hollow shaft and coupled to the hollow shaft at an end of the hollow shaft disposed within a compartment separate from the main compartment and having an opening covered by a cover which is separate from the casing of the main compartment.
2. A drive unit as claimed in claim 1, for use in a vehicle having a longitudinally mounted engine and a rear-axle differential drive unit wherein, within the separate compartment, the hollow shaft is coupled to the sun gear of a planetary gear system of which the ring gear is secured within the compartment and the planet gear carrier is coupled to the drive shaft passing through the hollow shaft.
3. A drive unit as claimed in claim 1, for use in a vehicle having a transversely mounted engine wherein the sun gear of a planetary system is connected to the hollow shaft, the ring gear of the planetary system being secured within the separate compartment and the planet gear carrier being coupled to the crown wheel of a bevel gear differential driving the dirve shaft passing through the hollow shaft and a further drive shaft passing through the cover the separate compartment.
4. A drive unit as claimed in claim 1, for use in a vehicle with four wheel drive, wherein the sun gear of a planetary system is connected to the hollow shaft, the ring gear of the planetary system being secured within the separate compartment and the planet gear carrier being coupled to the planet gear carrier of a further planetary system driving the drive shaft passing through the hollow shaft and a further drive shaft passing through the cover the separate compartment, the two drive shafts being further connected to a viscous clutch disposed within the separate compartment.
5. A drive unit as claimed in any preceding claim, wherein the change speed transmission is a continuously variable transmission including cone sheave pulleys and a traction belt, one of the pulleys being mounted on the hollow output shaft.
6. A drive unit for a motor vehicle having a hydrokinetic torque converter connected to be driven by an engine and fitted with a lockup clutch, wherein the turbine shaft off the converter extends through a hollow primary shaft of a continuously variable belt-drive transmission and is connected to the input member of a forward-gear/reverse-gear change-speed planet gear system disposed at the end of the drive unit remote from the torque converter and having an output member connected to drive the hollow primary shaft, and wherein the hollow primary shaft is connected by a traction belt to a hollow secondary shaft serving to drive the input member of a step-down planet gear system which is disposed in a laterally open casing compartment and has a ring gear secured in the casing and an output member which drives at least one output drive shaft which extends through the hollow secondary shaft; characterised in that the step-down planet gear system is mounted in a cantilevered manner in the laterally open casing compartment and in that the planet gear carrier of the planet gear system serves as a connecting element for coupling the hollow secondary shaft to the output drive shaft(s).
7. A drive unit according to Claim 6, wherein the planet gear carrier is connected to the crown wheel of a bevel wheel differential gearing, having two output drive shafts which extend in opposite directions and of which one passes through the hollow secondary shaft, the bevel wheel differential gearing being housed within a casing part covering the lateral opening of the compartment housing the planet gear.
8. A drive unit according to Claim 6, wherein the planet gear carrier is directly connected by way of a spider to the drive shaft which passes through the hollow secondary shaft, the drive shaft being connectable by a propeller shaft to a rear-axle differential drive unit and the laterally open compartment in the gearbox casing part being closed by a cover.
9. A drive unit according to Claim 6, wherein the planet gear carrier is connected by way of a driving collar to the input member of a distributive planet gear system having two output members connected to respective drive shafts of which on passes through the hollow secondary shaft and which are connected to one another by a viscous clutch, the drive shafts being connectable by way of respective propeller shafts to respective differential drive units in the front and rear axles, and the planet gear system and the viscous clutch being disposed in a flanged casing part covering the lateral opening in the open compartment.
10. A drive unit constructed arranged and adapted to operate substantially as herein described with reference to and as illustrated in the accompanying drawings.
GB08708205A 1986-04-10 1987-04-06 Drive unit for a motor vehicle having separate output casing compartment with cover Withdrawn GB2189854A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19863612047 DE3612047A1 (en) 1986-04-10 1986-04-10 DRIVE UNIT FOR MOTOR VEHICLES

Publications (2)

Publication Number Publication Date
GB8708205D0 GB8708205D0 (en) 1987-05-13
GB2189854A true GB2189854A (en) 1987-11-04

Family

ID=6298372

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08708205A Withdrawn GB2189854A (en) 1986-04-10 1987-04-06 Drive unit for a motor vehicle having separate output casing compartment with cover

Country Status (3)

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DE (1) DE3612047A1 (en)
FR (1) FR2597035A1 (en)
GB (1) GB2189854A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2200955A (en) * 1986-12-12 1988-08-17 Fuji Heavy Ind Ltd Power transmitting system of a four-wheel drive vehicle
WO1998048198A3 (en) * 1997-04-18 1999-01-21 Automotive Products Plc Torsionally resilient means in vehicle driveliners
GB2329950A (en) * 1997-04-18 1999-04-07 Automotive Products Plc Torsionally resilient means in vehicle drivelines
EP0925987A3 (en) * 1997-12-22 2000-05-17 Audi Ag Drive train arrangement
EP1424236A1 (en) * 2002-11-28 2004-06-02 Audi Ag Drive system
US7309301B2 (en) 2005-10-21 2007-12-18 Ford Global Technologies, Llc Transaxle having a differential mechanism and on-demand transfer clutch
US7448977B2 (en) 2005-10-21 2008-11-11 Ford Global Technologies, Llc Motor vehicle transaxle having a differential mechanism controlled by an on-demand clutch
US7845452B2 (en) 2007-05-16 2010-12-07 Polaris Industries Inc. Drivetrain for an all terrain vehicle
US8596398B2 (en) 2007-05-16 2013-12-03 Polaris Industries Inc. All terrain vehicle
US10214259B2 (en) 2008-02-04 2019-02-26 Polaris Industries Inc. ATV having arrangement for a passenger

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4002925A1 (en) * 1990-02-01 1991-08-08 Kloeckner Humboldt Deutz Ag Transmission for four-wheel drive agricultural tractor - has auxiliary equipment gearboxes connected to front and rear differentials
DE10312577A1 (en) * 2003-03-21 2005-01-13 Bayerische Motoren Werke Ag Powertrain for vehicles
DE102014206079A1 (en) 2013-04-05 2014-10-09 Magna Powertrain Ag & Co Kg traction drive

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2186109A5 (en) * 1972-05-25 1974-01-04 Herwaythorn Sa
GB2046374B (en) * 1978-12-09 1982-11-17 Gkn Transmissions Ltd Power transmissions
JPS5666557A (en) * 1979-10-30 1981-06-05 Aisin Warner Ltd Speed change gear
GR78336B (en) * 1980-02-23 1984-09-26 Interparte Ag
DE8014768U1 (en) * 1980-06-03 1981-12-17 Daimler-Benz Ag, 7000 Stuttgart DRIVE UNIT FOR MOTOR VEHICLES
DE3214709A1 (en) * 1982-04-21 1983-11-03 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen TRANSMISSION SYSTEM FOR FULL-CHAIN VEHICLES
AT378046B (en) * 1983-10-06 1985-06-10 Steyr Daimler Puch Ag LIQUID FRICTION COUPLING

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2200955A (en) * 1986-12-12 1988-08-17 Fuji Heavy Ind Ltd Power transmitting system of a four-wheel drive vehicle
GB2200955B (en) * 1986-12-12 1990-11-28 Fuji Heavy Ind Ltd Power transmitting system of a four-wheel drive vehicle
WO1998048198A3 (en) * 1997-04-18 1999-01-21 Automotive Products Plc Torsionally resilient means in vehicle driveliners
GB2329950A (en) * 1997-04-18 1999-04-07 Automotive Products Plc Torsionally resilient means in vehicle drivelines
EP0925987A3 (en) * 1997-12-22 2000-05-17 Audi Ag Drive train arrangement
EP1424236A1 (en) * 2002-11-28 2004-06-02 Audi Ag Drive system
US7309301B2 (en) 2005-10-21 2007-12-18 Ford Global Technologies, Llc Transaxle having a differential mechanism and on-demand transfer clutch
US7448977B2 (en) 2005-10-21 2008-11-11 Ford Global Technologies, Llc Motor vehicle transaxle having a differential mechanism controlled by an on-demand clutch
US7845452B2 (en) 2007-05-16 2010-12-07 Polaris Industries Inc. Drivetrain for an all terrain vehicle
US8075007B2 (en) 2007-05-16 2011-12-13 Polaris Industries Inc. Suspension for an all terrain vehicle
US8091657B2 (en) 2007-05-16 2012-01-10 Polaris Industries Inc. Frame for an all terrain vehicle
US8596398B2 (en) 2007-05-16 2013-12-03 Polaris Industries Inc. All terrain vehicle
US10457140B2 (en) 2007-05-16 2019-10-29 Polaris Industries Inc. All terrain vehicle
US10493846B2 (en) 2007-05-16 2019-12-03 Polaris Industries Inc. All terrain vehicle
US10214259B2 (en) 2008-02-04 2019-02-26 Polaris Industries Inc. ATV having arrangement for a passenger

Also Published As

Publication number Publication date
DE3612047A1 (en) 1987-10-15
GB8708205D0 (en) 1987-05-13
FR2597035A1 (en) 1987-10-16

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