GB2106461A - Single wheel drive unit - Google Patents

Single wheel drive unit Download PDF

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Publication number
GB2106461A
GB2106461A GB08226783A GB8226783A GB2106461A GB 2106461 A GB2106461 A GB 2106461A GB 08226783 A GB08226783 A GB 08226783A GB 8226783 A GB8226783 A GB 8226783A GB 2106461 A GB2106461 A GB 2106461A
Authority
GB
United Kingdom
Prior art keywords
inner body
drive unit
outer housing
unit according
motor
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
GB08226783A
Other versions
GB2106461B (en
Inventor
Karl-Heinz Jakubowski
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.)
Vodafone GmbH
Original Assignee
Mannesmann 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 Mannesmann AG filed Critical Mannesmann AG
Publication of GB2106461A publication Critical patent/GB2106461A/en
Application granted granted Critical
Publication of GB2106461B publication Critical patent/GB2106461B/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K7/0015—Disposition of motor in, or adjacent to, traction wheel the motor being hydraulic
    • 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
    • B60K17/043—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
    • B60K17/046—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel with planetary gearing having orbital motion
    • 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
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K2007/0038—Disposition of motor in, or adjacent to, traction wheel the motor moving together with the wheel axle
    • 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
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K2007/0092—Disposition of motor in, or adjacent to, traction wheel the motor axle being coaxial to the wheel axle

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Retarders (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Abstract

The invention relates to single- wheel drive units for commercial vehicles of the kind in which a wheel is driven through a gear mechanism by a coaxial drive shaft coupled to an hydraulic motor. In the drive unit, the motor (1) is fixedly connected to an inner body (6) upon which an outer housing (5) forming the wheel hub is rotatably mounted. This mounting comprises a bearing of which one race is formed on the inner body (6) and the other on the outer housing (5). A drive shaft (2) extends within the inner body (6) from the motor (1) and is coupled via a gear train (2a, 8, 4) to the housing (5). The unit is closed at both axial ends by a sliding seal (7) at the motor end and a cover plate (4, 12) integral with the outer housing (5) at the other. <IMAGE>

Description

SPECIFICATION A single wheel drive unit for commercial vehicles The invention relates to single-wheel drive units for commercial vehicles of the kind wherein the prime mover is an hydraulic motor. Particularly, the invention relates to such units in which a drive shaft coupled to the motor extends within an inner body, and through a gearing drives an outer housing forming the wheel hub and rotatably mounted on the inner body.
The aim of the invention is to create a compact and space-saving single-wheel drive unit, which makes it possible to reduce the weight of the wheel hub drive. At the same time a simplified assembly is sought and by reducing the number of drive parts maintenance can be facilitated. To these ends, a drive unit is provided in accordance with the invention which comprises an hydraulic motor fixedly connected to an inner body upon which an outer housing forming the wheel hub is rotatably mounted by means of at least one bearing, of which bearing the inner race is formed on the inner body and the outer race is formed on the outer housing; a drive shaft coupled to the motor and extending within the inner body; and a gear train coupling the drive shaft to the outer housing, the unit being closed around the end remote from the motor by a cover plate integral with the outer housing, and at the other end by a sliding seal disposed between the outer housing and inner body.
In preferred embodiments of the invention, the gear train is epicyclic with a planet wheel thereof mounted in a wall of the inner body. The planet wheel or wheels can be a stepped gear to provide different ratios. This arrangement enables the gear ratio to be selected from a very broad range without complicating the construction to any great extent which also may remain compact.
An hydrostatic-mechanical supplementary drive for motor vehicles, in particular tractors, is known from German Patent No: 18 04 779. The arrangement described therein has a complex drive train and requires a relatively large housing, because an epicyclic gear is used which is arranged in a separate housing. Another hydrostatic motor is described in German Patent Application No: P 30 15 818.0, and a singlewheel drive for processing machines is disclosed in German Patent Application No: 27 44 977.
Compared with these known drives, the drive according to the invention is substantially more simple and compact. Through the reduced number of components, assembly and maintenance are simplified. By eliminating the outer and inner races of the ball and roller bearings, the whole drive can be constructed with a smaller diameter. Further, the preferred mounting of an epicyclic planet gear in the inner body enables a shortening of the drive in the direction of the longitudinal axis. Both space and weight reductions can be achieved.
In another preferred feature the inner body takes the form of an open ended container closed at its end remote from the hydraulic motor, the gear train passing through the wall thereof. Means may also be provided for limiting the axial movement of the drive shaft from the motor. Such means are normally mounted in the inner body and may comprise a projection from the closed end of the inner body.
Weight and space savings are achieved particularly in units of the invention by the compact complementary design of the outer housing and inner body, which also form the outer and inner races of the bearing of the hub. This design can incorporate the other features discussed herein by mounting various components in or on one of the major parts. This permits a step by step construction with a minimum of complicated assembly stages.
Apart from simplified assembly and maintenance, through the economizing on weight on the drive unit, the payload can be increased accordingly. Furthermore, through the drive unit according to the invention, the unsprung matter in the drive gear is reduced.
The invention will now be described by way of example and with reference to the accompanying drawing which shows in partial cross-section a preferred embodiment thereof.
As shown in the drawing, an hydraulic motor is attached with the aid of bolts 1 3 on a flange 11 arranged on an inner body 6. The flange 11 arranged on the inner body 6 also serves as a connection plate for the connection of the drive unit to the framework or to steering components of the vehicle. The inner body 6 is constructed generally in the form of a tubular container open on the driving side nearest the motor 1, and in which a drive shaft 2 carrying a drive gear 2a is rotatably arranged. A projection 9 is arranged on the inner side of the base of the inner body 6, to limit relative axial movement between the drive shaft 2 and the inner body 6. On the inner body 6 an outer housing 5 forming the hub is supported by means of ball bearings 10.The inner race for these ball bearings 10 is formed on the cylindrical outer surface of the inner body 6, whilst the outer race is formed on the inner surface of the outer housing 5.
A step planet gear 8, the axis of which runs parallel to the axis of the drive shaft 2, is rotatably supported in friction bearings 3 in the wall of the inner body 6. In the embodiment described, the step planet 8 has a bore, through which a journal 14 is received in form-locking connection therewith. The step planet 8 meshes on the one hand with the drive gear 2a and on the other hand with inward facing teeth on a gear 4 fastened by means of bolts on the front face of the outer housing 5. Drive is transmitted through the gears 2a, 8, and 4 from the drive shaft 2 to the hub 5, which in use will carry a wheel rim, not shown.
On the inner side of the outer housing 5 a recess is provided, which receives a sealing ring 7.
By this means, one end of the drive unit is sealed off. In the example shown, the internal gear 4 has a cover 12, and together they form a locking plate at the other end of the outer housing 5, perpendicular to the axis of the drive shaft to seal the other end of the drive unit.
The drive unit may also incorporate a service brake of which one member is fastened to the outer housing 5 and another member is fixed relative to the inner body 6.

Claims (11)

1. A single-wheel drive unit for commercial vehicles comprising an hydraulic motor fixedly connected to an inner body upon which an outer housing forming the wheel hub is rotatably mounted by means of at least one bearing, of which bearing the inner race is formed on the inner body and the outer race is formed on the outer housing; a drive shaft coupled to the motor and extending within the inner body; and a gear train coupling the drive shaft to the outer housing, the unit being closed around the end remote from the motor by a cover plate integral with the outer housing, and at the other end by a sliding seal disposed between the outer housing and inner body.
2. A drive unit according to Claim 1 wherein the gear train is epicyclic with a planet wheel thereof mounted in a wall of the inner body.
3. A drive unit according to Claim 2 wherein said planet wheel is a stepped gear.
4. A drive unit according to any preceding Claim wherein the gear train comprises a ring gear having inwardly facing teeth mounted on the outer housing, which gear forms at least part of the cover plate.
5. A drive unit according to Claim 4 wherein the cover plate comprises a cover secured to the ring gear.
6. A drive unit according to Claim 1 wherein the inner body takes the form of an open ended container closed at its end remote from the hydraulic motor, the gear train passing through the wall thereof.
7. A drive unit according to any preceding Claim including means mounted in the inner body for limiting the axial movement of the drive shaft from the motor.
8. A drive unit according to Claim 6 and Claim 7 wherein said means comprises a projection from the closed end of the inner body.
9. A drive unit according to any preceding Claim including a service brake of which one member is attached to the outer housing and the other is fixed relative to the inner body.
10. A drive unit according to any preceding Claim wherein the motor is connected to a flange on the inner body, which flange is extended to provide means for mounting the unit in a said vehicle.
11. A single wheel drive unit for commercial vehicles substantially as described herein with reference to the accompanying drawing.
GB08226783A 1981-09-18 1982-09-20 Single wheel drive unit Expired GB2106461B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19813137857 DE3137857A1 (en) 1981-09-18 1981-09-18 "SINGLE WHEEL DRIVE UNIT FOR COMMERCIAL VEHICLES"

Publications (2)

Publication Number Publication Date
GB2106461A true GB2106461A (en) 1983-04-13
GB2106461B GB2106461B (en) 1985-08-14

Family

ID=6142420

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08226783A Expired GB2106461B (en) 1981-09-18 1982-09-20 Single wheel drive unit

Country Status (4)

Country Link
DE (1) DE3137857A1 (en)
FR (1) FR2513192B1 (en)
GB (1) GB2106461B (en)
IT (1) IT1190974B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2218951A (en) * 1987-05-27 1989-11-29 Hiroshi Sato Power transmission system of vehicles

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT390921B (en) * 1984-09-11 1990-07-25 Morwitzer Karl Hydraulic drive system for vehicles
DE3606876C2 (en) * 1986-03-03 1996-07-18 Pulsgetriebe Dipl Ingenieure W Wheel hub gear
DE3905292A1 (en) * 1989-02-21 1990-08-23 Linde Ag Wheel-drive unit
DE4307616C2 (en) * 1993-03-08 1996-06-27 Mannesmann Ag Hydrostatic-mechanical transmission
DE102006038396A1 (en) * 2006-08-15 2008-02-21 Kordel Antriebstechnik Gmbh Frontachsgetriebe
DE102011101073A1 (en) * 2011-05-06 2012-11-08 Stöber Antriebstechnik GmbH & Co. KG Planetary gear i.e. three-shaft gear, has housing provided on input-side and planet carrier provided on output-side, where housing and planet carrier are integrally formed with one another and housing is provided with flange
DE102014201646A1 (en) * 2014-01-30 2015-07-30 Zf Friedrichshafen Ag Gear unit for a group transmission

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7209185U (en) * 1972-10-19 Hoesch Ag Wheel hub gear
GB1092281A (en) * 1963-05-22 1967-11-22 Ransomes Sims & Jefferies Ltd Improvements in fork-lift reach trucks
BG25640A3 (en) * 1967-11-28 1978-11-10 Deere & Co
GB1298552A (en) * 1968-12-20 1972-12-06 Skefko Ball Bearing Company Lt Improvements in wheel hub bearing assemblies
DE2316932A1 (en) * 1973-04-04 1974-10-17 Hurth Masch Zahnrad Carl DEVICE FOR A DRIVE WHEEL OF MOTOR VEHICLES
US3954026A (en) * 1974-12-06 1976-05-04 Clark Equipment Company Wheel drive mechanism
GB1559276A (en) * 1975-11-04 1980-01-16 Newage Engs Co Motor in-wheel units
DE2608657A1 (en) * 1976-03-03 1977-09-08 Rammax Maschinenbau Heinz Schu Hub drive for compacting roller - has compact layout using concentric shells between servo motor and gearing
DE2630206A1 (en) * 1976-07-05 1978-03-23 Hurth Masch Zahnrad Carl WHEEL DRIVE FOR FLOOR TRUCKS
DE2744977C2 (en) * 1977-10-06 1984-08-09 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen Single wheel drive for work machines
DE3015818C2 (en) * 1980-04-22 1982-08-19 Mannesmann AG, 4000 Düsseldorf Non-rotatable connection of an axially movable planet carrier with a pin, in particular the support pin of a hydrostatic travel gear

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2218951A (en) * 1987-05-27 1989-11-29 Hiroshi Sato Power transmission system of vehicles

Also Published As

Publication number Publication date
FR2513192B1 (en) 1985-03-15
GB2106461B (en) 1985-08-14
FR2513192A1 (en) 1983-03-25
IT8223003A0 (en) 1982-08-26
IT1190974B (en) 1988-02-24
DE3137857C2 (en) 1987-07-02
DE3137857A1 (en) 1983-04-07

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Legal Events

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

Effective date: 19930920