EP0213151A1 - Hydrostatic drive system - Google Patents
Hydrostatic drive systemInfo
- Publication number
- EP0213151A1 EP0213151A1 EP19860901077 EP86901077A EP0213151A1 EP 0213151 A1 EP0213151 A1 EP 0213151A1 EP 19860901077 EP19860901077 EP 19860901077 EP 86901077 A EP86901077 A EP 86901077A EP 0213151 A1 EP0213151 A1 EP 0213151A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hydraulic
- hydraulic motors
- drive system
- valves
- hydrostatic drive
- 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- Withdrawn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
- 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
- B60K17/10—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of fluid 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
- F16H39/00—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution
- F16H39/02—Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution with liquid motors at a distance from liquid pumps
-
- 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
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
-
- 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
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
- F16H61/44—Control of exclusively fluid gearing hydrostatic with more than one pump or motor in operation
- F16H61/452—Selectively controlling multiple pumps or motors, e.g. switching between series or parallel
-
- 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
-
- 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
- B60K2007/0046—Disposition of motor in, or adjacent to, traction wheel the motor moving together with the vehicle body, i.e. moving independently from 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
- B60K2007/0061—Disposition of motor in, or adjacent to, traction wheel the motor axle being parallel to the wheel axle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2220/00—Electrical machine types; Structures or applications thereof
- B60L2220/40—Electrical machine applications
- B60L2220/46—Wheel motors, i.e. motor connected to only one wheel
Definitions
- the present invention is concerned with a hydrostatic drive system for a slip-steered vehicle, comprising two controllable hydraulic pumps, which are preferably mounted on one and the same driven shaft, a pair of hydraulic motors at each side of the vehicle, each of the said pairs being connected with a hydraulic pump of its own, whereby each hydraulic motor is arranged so as to drive at least one wheel.
- Prior-art drive systems for slip-steered vehicles having more than one-hydraulic motor per side are either provided with hydraulic motors connected in series or in parallel, or they may be provided with a number of hydraulic pumps equalling the number of motors. All of these systems are confined to one speed range only, which restricts their scope of application considerably. Vehicles with hydraulic motors connected in parallel obtain a high tractive power on each wheel, but their running speed is relatively low. Owing to these circum ⁇ stances, such a vehicle is well suitable, e.g., for heavy transportations in difficult terrain, whereas they are, on the whole, not at all suitable for running on the highway, owing to the low running speed.
- vehicles provided with hydraulic motors connected in series can be driven at a twice as high running speed compared to a vehicle provided with similar hydraulic motors connected in parallel, but, on the contrary, the tractive effort of vehicles with hydraulic motors con- nected in series goes down to about half the tractive effort of a vehicle with hydraulic motors connected in parallel. Therefore, vehicles provided with hydraulic motors connected in series are well suitable for running on highway, but the tractive effort of the vehicle is not quite enough for heavy transportations in difficult terrain.
- the object of the present invention is to pro ⁇ vide a drive system for a slip-steered vehicle which is suitable equally well for running in difficult terrain and on highway.
- Figure 1 is a schematical illustration of an example of a drive system in accordance with the inven ⁇ tion, whereat, for the sake of clarity of illustration, the hydraulic motors at the left side are connected in parallel and the hydraulic motors at the right side are connected in series,
- Figure 2 shows an example of the way in which the drive system is arranged in a vehicle seen from the bottom side.
- the drive system in accordance with the inven- tion comprises two controllable hydraulic pumps 2,3 driven, e.g., by a diesel engine 4.
- the hydraulic pumps 2,3 are preferably mounted on one and the same driven shaft.
- the vehicle 1 is provided with a pair of hydrau ⁇ lic motors 5,6; 7,8 at each side, each of which pairs 5,6 and 7,8 is connected with a hydraulic pump 2,3 of its own.
- Each of the said hydraulic motors 5,6; 7,8 is arranged so as to drive at least one wheel 9.
- the maneuvering of the two hydraulic pumps takes place appropriately by means of a common control lever, e.g., in accordance with the US Patent No.
- connection openings 18,19 on each of the hydraulic pumps 2,3 is connected to a pipe 10,14 provided with a valve, which said pipe communicates with the corresponding connection openings 20,21 ;22,23 on the hydraulic motors 5,6;7,8 at the respective side.
- the other two connection openings 24,25 on the hydraulic pumps 2,3 are connected to their respective pipes 12,16 provided with valves, which said pipes communicate with the other two connection openings 26,27;28,29 on the hydraulic motors 5,6;7,8 at the respective side.
- the system further includes one pipe 13,16 provided with a valve at each side, which said pipe connects the outlet opening 20;22 of one hydraulic motor 5;7 with the inlet opening 27;29 of the other hydraulic motor 6;8.
- connection openings 18,24; 19,25 of the respective hydraulic pumps 2,3 must be connected to the pipes 10,12 or 14,16, respectively, at opposite sides of the valve members 11 or 15, res- pectively, in the respective closed pipe and valve systems.
- the valves 11 and 15 are set so that the pipes 10 and 12 as well as 14 and 16 are open, whereas the pipes 13 and 17 are closed.
- the hydraulic pumps 2 and 3 are, e.g., set so that they pass hydraulic fluid from the connection opening 18 or 19, respectively, to the pipe 10 or 14, respectively, the flow of hydraulic fluid is distributed in each pipe system so that about half the fluid flows to the connection opening 20 or 22, respectively, of the ' hydraulic motor 5 or 7, respec ⁇ tively, whereas the other half flows to the connection opening 21 or 23, respectively, of the hydraulic motor 6 or 8, respectively, and drives the respective hydrau ⁇ lic motors 5,6,7 and 8 so that all the wheels 9 of the vehicle are made to revolve at an equally high speed in the same direction.
- the hydraulic fluid flows are passed along the pipe 12 or 16, respectively, to the connection opening 24 or 25, respectively, of the hyd ⁇ raulic pump.
- valves 11 and 15 are set so that they close the pipes 10 and 12 as well as 14 and 16, respec ⁇ tively, and open the pipe 13 and 17, respectively. If the hydraulic pumps 2 and 3 are set so that they pass hydraulic fluid from the connection opening 18 or 19, respectively, to the pipe 10 or 14, respectively, the entire fluid flow is passed through the said pipe to the connection opening 21 or 23, respectively, of the hydraulic motor 6 or 8, respectively, forcing the respective hydraulic motor to revolve.
- the flow of hydraulic fluid is passed further through the pipe 13 or 17, res ⁇ pectively, to the connection opening 20 or 22, respec ⁇ tively, of the hydraulic motor 5 or 7, respectively, forcing the respective hydraulic motor 5 or 7, respec ⁇ tively, and, consequently, the corresponding wheel 9 to revolve. From the hydraulic motor 5 or 7, respectively, the hydraulic fluid flow is then passed back to the respective hydraulic pump 2 or 3, respectively, via the pipe 12 or 16, respectively.
- valves 11,15 are preferably arranged in a single unit so that the valves at each side can be controlled by means of one and the same control member.
- the switching-over can take place completely mechanically or possibly in the hydraulic or electromagnetic way.
- the valves are, e.g., ball valves, but other types of valves may also be used.
- Two hydraulic motors or possibly all of the four hydraulic motors 5,6,7 and 8 may appropriately be arranged so as to drive the wheels 9 in a bogie unit 32.
- the respective hydraulic motor 5,6,7,8 is preferably arranged concentrically with the pivot shaft of the bogie unit 32, whereby the hydraulic motor concerned is arranged so as to transfer the drive power by means of two endless chains 33 to the two wheels 9 of the respective bogie unit 32.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Control Of Fluid Gearings (AREA)
Abstract
Système d'entraînement hydrostatique pour un véhicule dirigé par glissement (1), comprenant deux pompes hydrauliques régulables (2, 3), montées de préférence sur un seul et même arbre entraîné, une paire de moteurs hydrauliques (5, 6; 7, 8) de chaque côté du véhicule, chacune desdites paires (5, 6; 7, 8) étant reliée à une pompe hydraulique (2, 3) indépendante, chaque moteur hydraulique (5, 6, 7, 8) entraînant au moins une roue (9). L'invention se caractérise par le fait que les deux pompes hydrauliques (2, 3) sont reliées aux paires de moteurs hydrauliques correspondantes (5, 6;7, 8) via un système fermé de conduites et de soupapes (10, 11, 12, 13; 14, 15, 16, 17), ce qui permet d'effectuer une commutation entre une connexion en parallèle et une connexion en série des moteurs hydrauliques (5, 6; 7, 8).Hydrostatic drive system for a sliding-guided vehicle (1), comprising two adjustable hydraulic pumps (2, 3), preferably mounted on a single driven shaft, a pair of hydraulic motors (5, 6; 7, 8 ) on each side of the vehicle, each of said pairs (5, 6; 7, 8) being connected to an independent hydraulic pump (2, 3), each hydraulic motor (5, 6, 7, 8) driving at least one wheel ( 9). The invention is characterized in that the two hydraulic pumps (2, 3) are connected to the pairs of corresponding hydraulic motors (5, 6; 7, 8) via a closed system of pipes and valves (10, 11, 12 , 13; 14, 15, 16, 17), which makes it possible to switch between a parallel connection and a series connection of the hydraulic motors (5, 6; 7, 8).
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI850335A FI75308C (en) | 1985-01-25 | 1985-01-25 | HYDROSTATISKT DRIVSYSTEM. |
FI850335 | 1985-01-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0213151A1 true EP0213151A1 (en) | 1987-03-11 |
Family
ID=8520262
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19860901077 Withdrawn EP0213151A1 (en) | 1985-01-25 | 1986-01-24 | Hydrostatic drive system |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0213151A1 (en) |
JP (1) | JPS62501831A (en) |
AU (1) | AU5394886A (en) |
BR (1) | BR8605003A (en) |
DK (1) | DK454986A (en) |
FI (1) | FI75308C (en) |
HU (1) | HUT43527A (en) |
WO (1) | WO1986004306A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991019498A1 (en) * | 1990-06-11 | 1991-12-26 | The Du Pont Merck Pharmaceutical Company | Treatment of organ transplantation rejection |
WO2022208128A1 (en) * | 2021-03-29 | 2022-10-06 | Роман ШТЫЛЕВСКИЙ | Hydraulic drive for the driven wheels of a motor vehicle |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1249396B (en) * | 1991-02-05 | 1995-02-23 | Merlo Ind Metalmecc | MECHANICAL TRANSMISSION FOR HYDROSTATIC DRIVE OFF-ROAD MACHINES. |
ES2177379B1 (en) * | 2000-01-27 | 2004-09-16 | Universitat Politecnica De Catalunya | ACTIVE HYDROSTATIC TRANSMISSION SYSTEM FOR ARTICULATED VEHICLES WITH TRACTION ON THE FOUR WHEELS. |
US7845443B2 (en) | 2007-09-25 | 2010-12-07 | David K. Liberty | Low surface impact skid steered all terrain vehicle |
PL212942B1 (en) | 2008-05-14 | 2012-12-31 | Jacek Zaleski | Stepless, hydrostatic gear of SLGB rotary motion |
CN103600655B (en) * | 2013-11-22 | 2017-02-08 | 华南农业大学 | Front axle swinging type four-wheel drive chassis steering system for paddy fields |
WO2016162733A1 (en) * | 2015-04-10 | 2016-10-13 | Abbasszadeh Mohammad Taghi | Hydro-motors system with variable combination units |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE315509B (en) * | 1964-09-24 | 1969-09-29 | Atlas Copco Ab | |
NL6702365A (en) * | 1966-03-01 | 1967-09-04 | ||
CH453099A (en) * | 1966-06-27 | 1968-05-31 | Simit Societa Per Azioni | System with hydraulic transmission for propulsion of vehicles at different speeds |
GB1211787A (en) * | 1967-12-14 | 1970-11-11 | Danfoss As | Control equipment for the reversible hydrostatic drive of a vehicle |
BE877321A (en) * | 1979-06-27 | 1979-12-27 | Hainaut Sambre Sa | IMPROVEMENT IN WHEEL VEHICLES. |
-
1985
- 1985-01-25 FI FI850335A patent/FI75308C/en not_active IP Right Cessation
-
1986
- 1986-01-24 WO PCT/FI1986/000009 patent/WO1986004306A1/en not_active Application Discontinuation
- 1986-01-24 EP EP19860901077 patent/EP0213151A1/en not_active Withdrawn
- 1986-01-24 JP JP50091186A patent/JPS62501831A/en active Pending
- 1986-01-24 AU AU53948/86A patent/AU5394886A/en not_active Abandoned
- 1986-01-24 BR BR8605003A patent/BR8605003A/en unknown
- 1986-01-24 HU HU861121A patent/HUT43527A/en unknown
- 1986-09-24 DK DK454986A patent/DK454986A/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO8604306A1 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991019498A1 (en) * | 1990-06-11 | 1991-12-26 | The Du Pont Merck Pharmaceutical Company | Treatment of organ transplantation rejection |
WO2022208128A1 (en) * | 2021-03-29 | 2022-10-06 | Роман ШТЫЛЕВСКИЙ | Hydraulic drive for the driven wheels of a motor vehicle |
Also Published As
Publication number | Publication date |
---|---|
WO1986004306A1 (en) | 1986-07-31 |
DK454986D0 (en) | 1986-09-24 |
BR8605003A (en) | 1987-05-05 |
FI75308C (en) | 1988-06-09 |
FI850335A0 (en) | 1985-01-25 |
FI75308B (en) | 1988-02-29 |
FI850335L (en) | 1986-07-26 |
JPS62501831A (en) | 1987-07-23 |
HUT43527A (en) | 1987-11-30 |
DK454986A (en) | 1986-09-24 |
AU5394886A (en) | 1986-08-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19861222 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE FR GB IT LI LU NL SE |
|
17Q | First examination report despatched |
Effective date: 19871222 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19880503 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: CARLSON, MATS |