CA1132056A - Wheeled vehicle - Google Patents
Wheeled vehicleInfo
- Publication number
- CA1132056A CA1132056A CA354,756A CA354756A CA1132056A CA 1132056 A CA1132056 A CA 1132056A CA 354756 A CA354756 A CA 354756A CA 1132056 A CA1132056 A CA 1132056A
- Authority
- CA
- Canada
- Prior art keywords
- vehicle
- hydraulic
- drive
- hydraulic motors
- wheels
- 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.)
- Expired
Links
- 230000000712 assembly Effects 0.000 claims abstract description 7
- 238000000429 assembly Methods 0.000 claims abstract description 7
- 230000001105 regulatory effect Effects 0.000 claims abstract description 4
- 230000005540 biological transmission Effects 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 230000009347 mechanical transmission Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Classifications
-
- 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
- B62D11/10—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 gearings with differential power outputs on opposite sides, e.g. twin-differential or epicyclic gears
- B62D11/14—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 gearings with differential power outputs on opposite sides, e.g. twin-differential or epicyclic gears differential power outputs being effected by additional power supply to one side, e.g. power originating from secondary power source
- B62D11/18—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 gearings with differential power outputs on opposite sides, e.g. twin-differential or epicyclic gears differential power outputs being effected by additional power supply to one side, e.g. power originating from secondary power source the additional power supply being supplied hydraulically
-
- 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
- B60K17/10—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of fluid gearing
-
- 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
- B60K17/14—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing the motor of fluid or electric gearing being disposed in or adjacent to traction wheel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
- B62D21/18—Understructures, i.e. chassis frame on which a vehicle body may be mounted characterised by the vehicle type and not provided for in groups B62D21/02 - B62D21/17
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Gearings (AREA)
- Motor Power Transmission Devices (AREA)
- Arrangement And Driving Of Transmission Devices (AREA)
- Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
- Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
Abstract
ABSTRACT
Each drive wheel of a wheeled vehicle is driven by an associated individual hydraulic motor. The motors on respective sides of the vehicle are fed in series by respective pumps. The feed to the series-connected assemblies of hydraulic motors can be independently regulated.
Each drive wheel of a wheeled vehicle is driven by an associated individual hydraulic motor. The motors on respective sides of the vehicle are fed in series by respective pumps. The feed to the series-connected assemblies of hydraulic motors can be independently regulated.
Description
13~2~56 ~HEELED VEHICLE
The invention relates ~o a wheeled vehicle having a hydraulic drive.
In vehicles such as loaders, the assemblies formed by the wheels located on either side of the vehicle are independent from each other; this arrangement is suitable to ensure steering of the vehicle by separate action on each of these assemblies, but the wheels of the same assembly are advantageously dependent on one another so that the vehicle may be driven over all types of terrain.
Vehicles of this type provided with hydrostatic transmission are already known; in this case a main motor drives two hydraulic pumps which each supply a hydraulic motor controlling the assembly of the wheels located on the same side. Transmission of the output of the hydraulic motor to the wheels of an assembly is carried out by a mechanical transmission, for example a chain.
Such mechanical transmission causes the known disadvantages which are inherent to this technique: frequent maintenance and adjustment, and considerable amount of space occupied, in order to ensure accurate reliability.
The present invention relates to a vehicle provided with a device ensuring the drive function of the wheels and the control of the wheels located on the same side by means which are substantially hydraulic, i.e. means which do not have recourse to mechanical ;, ' .
transmission.
A device of this type has, in comparison with those comprising a mechanical transmission, the advantage of greater simplicity, greater strength~ and less exacting maintenance requirements9 and is therefore of increased efficiency.
Accordingly, the wheeled vehicle of the invention comprises as many hydraulic motors as there are drive wheels and in that each wheel is moved individually by its hydraulic motor.
Preferably the hydraulic motors engage with the drive wheels 10 of the vehicle at a ratio of 1/1. Alternatively, the hydraulic motors -may engage with the drive wheels through reducing gears incorporated in the wheel hubs.
The hydraulic motors preferably have a high torque and rotate at a low speed.
is In one embodiment of the invention, the vehicle comprises hydraulic drive wheels, optionally provided with braking devices.
It is preferable to include means enabling the supply of the hydraulic motors to be inverted.
In ~ d~ g~ the invention, the drive wheels located on the same side of the vehicle are hydraulically connected together, so as to constitute assemblies. In addition, the ~ y~L_ vehicle is provided with means which enable the series supply to each hydraulic motor assembly to be regulated independently.
For example, means are provided which enable the series supply of each hydraulic motor assembly supplied by a single hydraulic pump to be regulated independently, or each hydraulic motor assembly is provided with its own hydraulic pump.
In addition, it is preferable to include a by-pass which ensures a secondary connection between the series supplies of the hydraulic motor assemblies in order to guarantee the safety of the system in the case of overpressure.
The invention will be described further, by way of example, with reference to the accompanying drawings, whose sole Figure diagrammatically illustrates the drive system of a wheeled vehicle.
A main motor MP, fixed to the chassis of the vehicle9 drives two variable-flow hydraulic pumps P1 and P2 located on a common shaft a. The hydraulic pumps P1 and P2 supply in series lateral hydraulic motors M1,M2 and M3,M4 respectively. Each of these motors drives a wheel (not shown).
The drawing, by way of example, relates to a vehicle of the known ; loader type having four pneumatic-tyred wheels, but the inventionmay be applied to all types of wheeled vehicles whatever the number of wheels.
Switching means L1 and L2 for inverting the supply to the hydraulic motors M1,M2 and M3,M4 by the hydraulic pumps P1 and P2 enable the inversion of the direction of rotation of the motors M1,M2, ,, :~3Z~56 on one hand, and M3,M4, on the other hand.
A by-pass BP ensures a secondary connection between the series supply of the hydraulic motors M1,~2 and the series supply of the hydraulic motors M3,M4 in order to guarantee the safety of the system in the case of overpressure.
The vehicle may be provided, as is usual in this technique, with a discharge circuit DC, a filter F, a cooling radiator R1, and a leakage flow recycling pump Po which draws hydraulic ~ uid from a tank R2.
The vehicle described above has the following advantages:
1) omission of mechanical transmission and, consequently, of its disadvantages, i.e. the use of rod linkages, lubrication of the chain and monitoring of its extension, monitoring of its wear, adjustment of its tension, chain breakages;
The invention relates ~o a wheeled vehicle having a hydraulic drive.
In vehicles such as loaders, the assemblies formed by the wheels located on either side of the vehicle are independent from each other; this arrangement is suitable to ensure steering of the vehicle by separate action on each of these assemblies, but the wheels of the same assembly are advantageously dependent on one another so that the vehicle may be driven over all types of terrain.
Vehicles of this type provided with hydrostatic transmission are already known; in this case a main motor drives two hydraulic pumps which each supply a hydraulic motor controlling the assembly of the wheels located on the same side. Transmission of the output of the hydraulic motor to the wheels of an assembly is carried out by a mechanical transmission, for example a chain.
Such mechanical transmission causes the known disadvantages which are inherent to this technique: frequent maintenance and adjustment, and considerable amount of space occupied, in order to ensure accurate reliability.
The present invention relates to a vehicle provided with a device ensuring the drive function of the wheels and the control of the wheels located on the same side by means which are substantially hydraulic, i.e. means which do not have recourse to mechanical ;, ' .
transmission.
A device of this type has, in comparison with those comprising a mechanical transmission, the advantage of greater simplicity, greater strength~ and less exacting maintenance requirements9 and is therefore of increased efficiency.
Accordingly, the wheeled vehicle of the invention comprises as many hydraulic motors as there are drive wheels and in that each wheel is moved individually by its hydraulic motor.
Preferably the hydraulic motors engage with the drive wheels 10 of the vehicle at a ratio of 1/1. Alternatively, the hydraulic motors -may engage with the drive wheels through reducing gears incorporated in the wheel hubs.
The hydraulic motors preferably have a high torque and rotate at a low speed.
is In one embodiment of the invention, the vehicle comprises hydraulic drive wheels, optionally provided with braking devices.
It is preferable to include means enabling the supply of the hydraulic motors to be inverted.
In ~ d~ g~ the invention, the drive wheels located on the same side of the vehicle are hydraulically connected together, so as to constitute assemblies. In addition, the ~ y~L_ vehicle is provided with means which enable the series supply to each hydraulic motor assembly to be regulated independently.
For example, means are provided which enable the series supply of each hydraulic motor assembly supplied by a single hydraulic pump to be regulated independently, or each hydraulic motor assembly is provided with its own hydraulic pump.
In addition, it is preferable to include a by-pass which ensures a secondary connection between the series supplies of the hydraulic motor assemblies in order to guarantee the safety of the system in the case of overpressure.
The invention will be described further, by way of example, with reference to the accompanying drawings, whose sole Figure diagrammatically illustrates the drive system of a wheeled vehicle.
A main motor MP, fixed to the chassis of the vehicle9 drives two variable-flow hydraulic pumps P1 and P2 located on a common shaft a. The hydraulic pumps P1 and P2 supply in series lateral hydraulic motors M1,M2 and M3,M4 respectively. Each of these motors drives a wheel (not shown).
The drawing, by way of example, relates to a vehicle of the known ; loader type having four pneumatic-tyred wheels, but the inventionmay be applied to all types of wheeled vehicles whatever the number of wheels.
Switching means L1 and L2 for inverting the supply to the hydraulic motors M1,M2 and M3,M4 by the hydraulic pumps P1 and P2 enable the inversion of the direction of rotation of the motors M1,M2, ,, :~3Z~56 on one hand, and M3,M4, on the other hand.
A by-pass BP ensures a secondary connection between the series supply of the hydraulic motors M1,~2 and the series supply of the hydraulic motors M3,M4 in order to guarantee the safety of the system in the case of overpressure.
The vehicle may be provided, as is usual in this technique, with a discharge circuit DC, a filter F, a cooling radiator R1, and a leakage flow recycling pump Po which draws hydraulic ~ uid from a tank R2.
The vehicle described above has the following advantages:
1) omission of mechanical transmission and, consequently, of its disadvantages, i.e. the use of rod linkages, lubrication of the chain and monitoring of its extension, monitoring of its wear, adjustment of its tension, chain breakages;
2) a decrease in the frequency and duration of maintenance of the power transmission system; since the moving components of this completely hydraulic system are constantly lubricated, such maintenance is limited to a periodic change of the lubricating fluid and to checking of the condition of the piping and connections;
3) increased resistance of the device to external factors;
4) increase of strength in operation;
S~
S~
5) a reduction in the space occupied by the transmission system, which enables the ground clearance of the vehicle to be improved and the space available for the driver's cabin to be increased.
Claims (10)
1. A wheeled vehicle comprising drive wheels and as many hydraulic motors as there are drive wheels, each drive wheel being driven individually by a respective one of the hydraulic motors, the hydraulic motors associated with the drive wheels located on the same side of the vehicle being hydraulically connected in series so as to constitute an assembly, means being provided for regulating the feed to each assembly independently of the feed to the other assembly.
2. A vehicle as claimed in claim 1, in which the hydraulic motors drive the respective drive wheels at a ratio of 1/1.
3. A vehicle as claimed in claim 1, in which the hydraulic motors drive the respective drive wheels through respective reducing gears mounted in respective hubs of the wheels.
4. A vehicle as claimed in claim 1, in which the hydraulic motors are high torque low speed motors.
5. A vehicle as claimed in claim 1, comprising hydraulic drive-wheels.
6. A vehicle as claimed in claim 5, in which the hydraulic drive-wheels include braking devices.
7. A vehicle as claimed in claim 1, including means for reversing the feed to the hydraulic motors.
8. A vehicle as claimed in claim 1, in which the hydraulic motors of the assemblies are fed by a single hydraulic pump.
9. A vehicle as claimed in claim 1, in which each hydraulic motor assembly is provided with its own hydraulic pump.
10. A vehicle as claimed in claim 1, including a by-pass ensuring a secondary connection between the series feeds to the hydraulic motors of the assemblies in order to guarantee the safety of the system in the case of overpressure.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE877321 | 1979-06-27 | ||
| BE877,321 | 1979-06-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1132056A true CA1132056A (en) | 1982-09-21 |
Family
ID=3861781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA354,756A Expired CA1132056A (en) | 1979-06-27 | 1980-06-25 | Wheeled vehicle |
Country Status (10)
| Country | Link |
|---|---|
| BE (1) | BE877321A (en) |
| CA (1) | CA1132056A (en) |
| DE (1) | DE3023749A1 (en) |
| ES (1) | ES492840A0 (en) |
| FR (1) | FR2459738B1 (en) |
| GB (1) | GB2058300B (en) |
| IT (1) | IT1188882B (en) |
| LU (1) | LU82547A1 (en) |
| NL (1) | NL8003604A (en) |
| PT (1) | PT71397A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI75308C (en) * | 1985-01-25 | 1988-06-09 | Ky Carlson Project Kb | HYDROSTATISKT DRIVSYSTEM. |
| CH667848A5 (en) * | 1985-06-26 | 1988-11-15 | Leo Stahl Ag | DRIVE FOR A VEHICLE. |
| FR2664553B1 (en) * | 1990-07-11 | 1995-07-07 | Pierre Francois Guy | ADAPTATION TO A MACHINE MOUSED BY A HYDROSTATIC TRANSMISSION OF A STEERING CONTROL SYSTEM BY SWIVELING THE ROCKETS OR BY LATERAL LOCKING OF THE WHEELS TO THE DRIVER'S WHEEL. |
| GB2246844A (en) * | 1990-07-13 | 1992-02-12 | Glowreach Limited | Vehicle with auxiliary drive system |
| JP3963050B2 (en) * | 1998-11-18 | 2007-08-22 | 株式会社豊田自動織機 | Hydraulic drive device for industrial four-wheel drive vehicle and industrial four-wheel drive vehicle |
| US6179072B1 (en) * | 1999-10-13 | 2001-01-30 | Deere & Company | Supplemental charge for hydrostatic steering system |
| DE10356155B4 (en) * | 2003-12-02 | 2006-06-14 | Brueninghaus Hydromatik Gmbh | Hydrostatic drive system with pump-side hydraulic fluid volume division |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1140469B (en) * | 1961-01-11 | 1962-11-29 | Max Adolf Mueller Dipl Ing | Hydrostatic single drive for heavy all-terrain vehicles, especially earthmoving machines, construction equipment and recovery vehicles |
| DE1780721A1 (en) * | 1968-07-27 | 1977-04-14 | Kloeckner Humboldt Deutz Ag | ARRANGEMENT FOR TRANSMISSION OF POWER FROM THE DRIVE UNITS OF A MOTOR VEHICLE |
| FR2036637A5 (en) * | 1969-03-26 | 1970-12-24 | Schwermasch Nobas Veb | |
| DE1922399A1 (en) * | 1969-05-02 | 1970-11-12 | Koedel & Boehm Gmbh | All-terrain, especially agricultural, self-propelled vehicle with hydraulic drive |
-
1979
- 1979-06-27 BE BE5/5203A patent/BE877321A/en not_active IP Right Cessation
-
1980
- 1980-06-16 PT PT71397A patent/PT71397A/en unknown
- 1980-06-23 NL NL8003604A patent/NL8003604A/en not_active Application Discontinuation
- 1980-06-24 GB GB8020586A patent/GB2058300B/en not_active Expired
- 1980-06-24 FR FR8015019A patent/FR2459738B1/en not_active Expired
- 1980-06-25 CA CA354,756A patent/CA1132056A/en not_active Expired
- 1980-06-25 LU LU82547A patent/LU82547A1/en unknown
- 1980-06-25 DE DE19803023749 patent/DE3023749A1/en not_active Withdrawn
- 1980-06-25 IT IT67989/80A patent/IT1188882B/en active
- 1980-06-26 ES ES492840A patent/ES492840A0/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| DE3023749A1 (en) | 1981-01-22 |
| NL8003604A (en) | 1980-12-30 |
| BE877321A (en) | 1979-12-27 |
| IT8067989A0 (en) | 1980-06-25 |
| LU82547A1 (en) | 1980-10-24 |
| FR2459738A1 (en) | 1981-01-16 |
| GB2058300A (en) | 1981-04-08 |
| PT71397A (en) | 1980-07-01 |
| IT1188882B (en) | 1988-01-28 |
| ES8102018A1 (en) | 1980-12-16 |
| FR2459738B1 (en) | 1987-04-30 |
| GB2058300B (en) | 1983-02-16 |
| ES492840A0 (en) | 1980-12-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |