GB2392425A - Peripheral contact tandem drive system - Google Patents
Peripheral contact tandem drive system Download PDFInfo
- Publication number
- GB2392425A GB2392425A GB0318007A GB0318007A GB2392425A GB 2392425 A GB2392425 A GB 2392425A GB 0318007 A GB0318007 A GB 0318007A GB 0318007 A GB0318007 A GB 0318007A GB 2392425 A GB2392425 A GB 2392425A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wheels
- machine
- wheel
- machine according
- driving engagement
- 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- Withdrawn
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
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/36—Arrangement or mounting of transmissions in vehicles for driving tandem wheels
-
- 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
- B60K17/34—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles
-
- 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
- B60K23/00—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for
- B60K23/08—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for for changing number of driven wheels, for switching from driving one axle to driving two or more axles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D11/00—Steering non-deflectable wheels; Steering endless tracks or the like
- B62D11/02—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides
- B62D11/06—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source
- B62D11/08—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using brakes or clutches as main steering-effecting means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2200/00—Type of vehicle
- B60Y2200/20—Off-Road Vehicles
- B60Y2200/22—Agricultural vehicles
- B60Y2200/225—Walk behind vehicles, e.g. motorized wheel barrows
-
- 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
- F16H13/00—Gearing for conveying rotary motion with constant gear ratio by friction between rotary members
- F16H13/02—Gearing for conveying rotary motion with constant gear ratio by friction between rotary members without members having orbital motion
- F16H13/04—Gearing for conveying rotary motion with constant gear ratio by friction between rotary members without members having orbital motion with balls or with rollers acting in a similar manner
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Arrangement And Driving Of Transmission Devices (AREA)
Abstract
In a drive system, one side of a machine comprises two ground engaging wheels 1,2 and a third wheel 3 having a periphery 4 which frictionally contacts the periphery 5 of the front wheel 1 and the periphery 6 of the rear wheel 2. One of the wheels 1,2,3 is driven by a motor. The system is suitable for providing four wheel drive for a civil engineering or mechanical handling machine, such as a dumper truck or powered barrow. The third wheel 3 is mounted to a chassis 7 by a bracket 8 and may be an idler wheel which is selectively engaged by inflation of a tyre. The opposite side of the machine has two ground engaging wheels and preferably a similar third wheel arrangement, steering being achieved by disengaging the drive and by braking on one side of the machine.
Description
POWER DRIVE
This invention relates to a multi-wheel drive mechanism and, in the preferred embodiment, provides a simple and robust multi-wheel drive mechanism suitable for use on relatively low cost vehicles, for example small civil engineering and mechanical handling machines.
Traditionally, small civil engineering and mechanical handling machines (for example powered barrows) have been mounted on four wheels, with two ofthe wheels at the same end of the machine driven by an engine via a belt or chain drive. Such arrangements are simple to implement, low cost, and robust. Whilst it is well recognised that advantages could be derived from driving all four wheels, it has generally been felt that the additional complexity, and cost, of utilising four wheel drive is not justified in this type of machine.
Accordingly, the need exists for a simple, robust and low cost system for implementation of four wheel drive for small civil engineering and load handling machines. In accordance with the present invention a load handling machine comprises: a first pair of ground engaging wheels located adjacent one end of the machine; a second pair of ground engaging wheels located adjacent the other end ofthe machine; at least one third wheel the periphery of which is in frictional driving engagement with the periphery of one ofthe first pair of wheels and one ofthe second pair wheels; and a motor for rotating one of the three wheels which are in frictional driving engagement with each other whereby the remaining wheels are driven by way of the frictional driving engagement.
In a particularly preferred embodiment of the invention two third wheels are provided, each in frictional driving engagement with a respective one of the first
wheels and a respective one of the second wheels.
In a particularly simple embodiment of the invention the first wheels are secured to a common axle for rotation therewith and the motor drives the axle in order to rotate the first wheels. The third wheels are rotated by virtue of the frictional driving engagement between the third wheels and the first wheel and the second wheels are driven by virtue of the frictional driving engagement between the second wheels and the third wheels. Accordingly, all four ground engaging wheels are driven.
In an alternative arrangement the drive means may drive the third wheels which in turn drive the first wheels and the second wheels by virtue of the frictional driving engagement. The arrangement may be such that the third wheel is optionally engaged or disengaged in its driving contact with one or both of the first and second wheels whereby engagement ofthe four wheel drive feature is selectable by an operator ofthe machine. In the preferred embodiment, however, the third wheel is fixed in an operative position in which it is in driving engagement with both the first and second wheels. The invention will be better understood from the following description of a
preferred embodiment, given by way of example only, reference being had to the accompanying drawings wherein: Figure 1 illustrates schematically the wheels of a conventional small civil engineering or load carrying machine, Figure 2 is a view corresponding to Figure 1 but showing implementation of a preferred embodiment of the present invention.
Referring firstly to Figure 1, it is common to provide small civil engineering machines (for example small dumper trucks or powered barrows) with a pair of ground engaging driving wheels 1 and a pair of ground engaging non-driving wheels 2. The driving wheels 1 may be driven by any suitable means, for example by belt or chain drive from a small internal combustion engine or by an electric motor or respective electric motors driving the first wheels on opposite sides of the chassis.
Although it is well recognised that it would in many cases be desirable to drive both the first wheels 1 and the second wheels 2, the cost of implementing a four wheel drive arrangement has previously been considered to be unacceptable for the type of machine in question.
I have now devised the arrangement shown in Figure 2 in which four wheel drive is provided by means of an additional third wheel 3 the periphery 4 of which is in frictional driving engagement with the periphery 5 of the first wheel 1 and the periphery 6 of the second wheel 2. Preferably two third wheels 3 are provided - one on each side of the chassis so that a driving connection is provided between the first wheel 1 and the second wheel 2 on both sides of the vehicle.
In the preferred arrangement the third wheel 3 is mounted to the chassis 7 of the vehicle by a bracket 8 and is in permanent driving engagement with the wheels 1 and 2. It is to be understood, however, that an alternative arrangement exists within the scope of the invention whereby the wheel 3 is movably mounted and is brought into its use configuration only when required. In general, however, for the most simple construction the wheel 3 will be rigidly mounted to the chassis 7 by the bracket 8.
In order to provide the necessary frictional driving engagement between the respective wheels at least one of the wheels 1, 2 and 3 is provided with an inflatable tyre. Typically, wheels 1 and 2 may be provided with inflatable tyres and wheel 3 will be provided with a suitable peripheral coating of rubber like material, and may be inflatable or non-inflatable. Preferably, the third wheel will have an inflatable tyre. In order to assemble the invention the or each inflatable tyre is first deflated, the third wheel is then positioned and the bracket 8 secured to the chassis 7. The inflatable tyre or tyres are then reinflated to provide a positive grip between the respective lyres.
It has been found that the arrangement described above provides an effective four wheel drive system for simple civil engineering and mechanical handling machine. The existing drive arrangements whereby the wheels at the front or rear of the machine are driven can be maintained, and drive transmitted to the other ground engaging wheels by means ofthe third wheels 3. It is to be noted, however, that within
the scope ofthe present invention drive may be applied to the third wheel 3 which will then provide the necessary frictional drive to the first wheel I and the second wheel 2.
Also, although the invention has been described in the context of a four wheeled machine, it should be appreciated that it may be applicable to machines having more than four wheels. in the case of six wheel machine, for example, a central driven wheel may be provided on each side ofthe chassis and a pair ofthird wheels provided to transmit drive from that central driven wheel to front and rear wheels ofthe chassis.
All such arrangements are within the scope of the present invention.
In use, the operator can steer the machine by raising two ofthe wheels clear of the ground and rotating the body on the remaining ground contacting wheels.
Preferably, the wheels which are not directly driven will be raised from the ground and a differential will be provided to assist turning of the body on the wheels which are driven. However, in an alternative embodiment of the invention a skid-steer arrangement may be provided whereby steering is effected by disconnecting drive from one side of the machine and, if necessary, braking the ground engaging wheels on that side of the machine. With a skid-steer arrangement the wheels on the side of the machine opposite to those which have been braked will continue to be driven resulting in rotation of the machine towards the braked side. Such a wheel skid-steer arrangement provides an extremely economical alternative to the chain drive or hydraulic drive systems conventionally used on four wheel drive skid-steer machines.
Claims (11)
1. A civil engineering or mechanical handling machine comprises: a first pair of ground engaging wheels located adjacent one end of the machine; a second pair of ground engaging wheels located adjacent the other end of the machine; at least one third wheel the periphery of which is in frictional driving engagement with the periphery of one of the first pair of wheels and one of the second pair wheels; and a motor for rotating one ofthe three wheels which are in frictional driving engagement with each other whereby the remaining wheels are rotatably driven by way of the frictional driving engagement.
2. A machine according to claim 1 wherein two third wheels are provided, each in frictional driving engagement with a respective one of the first wheels and a respective one of the second wheels.
3. A machine according to claim 1 or claim 2 wherein the first wheels are secured to a common axle for rotation therewith and the motor drives the axle in order to rotate the first wheels.
4. A machine according to claim 1 or claim 2 wherein the motor drives the third wheels which in turn drive the first wheels and the second wheels by virtue of the frictional driving engagement.
5. A machine according to any preceding claim wherein the third wheel is optionally engaged or disengaged in its driving contact with one or both of the first and second wheels whereby engagement ofthe four wheel drive feature is selectable by an operator of the machine.
6. A machine according to any of claims 1 to 4 the third wheel is fixed in an operative position in which it is in driving engagement with both the first and second
wheels.
7. A machine according to claim 6 wherein the driving engagement is provided by inflating an inflatable tyre provided on one or more of the wheels.
8. A machine according to any preceding claim wherein the machine is a dumper truck or a powered barrow.
9. A machine according to any preceding claim including means for disengaging drive from the wheels located on one side ofthe machine whilst maintaining drive to the wheels on the other side of the machine to effect steering of the machine.
10. A machine according to claim 9 including means for braking the wheels on one side of the machine whilst the wheels on the other side of the machine continue to be driven.
11. A civil engineering or mechanical handling machine substantially as hereinbefore described with reference to the accompanying drawing.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0217672A GB0217672D0 (en) | 2002-07-31 | 2002-07-31 | Powerdrive |
Publications (2)
Publication Number | Publication Date |
---|---|
GB0318007D0 GB0318007D0 (en) | 2003-09-03 |
GB2392425A true GB2392425A (en) | 2004-03-03 |
Family
ID=9941401
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB0217672A Ceased GB0217672D0 (en) | 2002-07-31 | 2002-07-31 | Powerdrive |
GB0318007A Withdrawn GB2392425A (en) | 2002-07-31 | 2003-07-31 | Peripheral contact tandem drive system |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB0217672A Ceased GB0217672D0 (en) | 2002-07-31 | 2002-07-31 | Powerdrive |
Country Status (1)
Country | Link |
---|---|
GB (2) | GB0217672D0 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2474226A (en) * | 2009-08-25 | 2011-04-13 | Terry Charles Rowlands | Motorised wheelbarrow |
RU2455175C1 (en) * | 2011-02-15 | 2012-07-10 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования Сибирский федеральный университет (СФУ) | Automotive drive system |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2380181A (en) * | 1944-04-11 | 1945-07-10 | Alvin T Krenzien | Front wheel drive for vehicles |
GB1018359A (en) * | 1963-12-31 | 1966-01-26 | Hubertus Josephus Van Doorne | Motor road vehicle |
GB1133284A (en) * | 1966-04-04 | 1968-11-13 | Ludwig Freiberger | Steerable self-propelled vibratory rolling machine |
US3788420A (en) * | 1972-01-27 | 1974-01-29 | J Lacroix | Differential type driving wheels system |
US3923112A (en) * | 1974-01-07 | 1975-12-02 | Muriel T Goodgame | Driven wheel arrangement |
WO1995018723A1 (en) * | 1994-01-11 | 1995-07-13 | Alfta Gallringsteknik Ab | Vehicle-driving wheel bogie and a hydraulic motor-driven driving roller for such a wheel bogie |
-
2002
- 2002-07-31 GB GB0217672A patent/GB0217672D0/en not_active Ceased
-
2003
- 2003-07-31 GB GB0318007A patent/GB2392425A/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2380181A (en) * | 1944-04-11 | 1945-07-10 | Alvin T Krenzien | Front wheel drive for vehicles |
GB1018359A (en) * | 1963-12-31 | 1966-01-26 | Hubertus Josephus Van Doorne | Motor road vehicle |
GB1133284A (en) * | 1966-04-04 | 1968-11-13 | Ludwig Freiberger | Steerable self-propelled vibratory rolling machine |
US3788420A (en) * | 1972-01-27 | 1974-01-29 | J Lacroix | Differential type driving wheels system |
US3923112A (en) * | 1974-01-07 | 1975-12-02 | Muriel T Goodgame | Driven wheel arrangement |
WO1995018723A1 (en) * | 1994-01-11 | 1995-07-13 | Alfta Gallringsteknik Ab | Vehicle-driving wheel bogie and a hydraulic motor-driven driving roller for such a wheel bogie |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2474226A (en) * | 2009-08-25 | 2011-04-13 | Terry Charles Rowlands | Motorised wheelbarrow |
US9108690B2 (en) | 2009-08-25 | 2015-08-18 | Terry Charles Rowlands | Motorised wheelbarrow |
RU2455175C1 (en) * | 2011-02-15 | 2012-07-10 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования Сибирский федеральный университет (СФУ) | Automotive drive system |
EA019943B1 (en) * | 2011-02-15 | 2014-07-30 | Федеральное Государственное Автономное Образовательное Учреждение Высшего Профессионального Образования "Сибирский Федеральный Университет" (Сфу) | Automotive drive system |
Also Published As
Publication number | Publication date |
---|---|
GB0318007D0 (en) | 2003-09-03 |
GB0217672D0 (en) | 2002-09-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |