DE29504612U1 - Drive control of a single-axle tractor - Google Patents
Drive control of a single-axle tractorInfo
- Publication number
- DE29504612U1 DE29504612U1 DE29504612U DE29504612U DE29504612U1 DE 29504612 U1 DE29504612 U1 DE 29504612U1 DE 29504612 U DE29504612 U DE 29504612U DE 29504612 U DE29504612 U DE 29504612U DE 29504612 U1 DE29504612 U1 DE 29504612U1
- Authority
- DE
- Germany
- Prior art keywords
- tractor
- drawbar
- valve arrangement
- implement
- drive control
- 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 - Lifetime
Links
- 238000011144 upstream manufacturing Methods 0.000 claims description 8
- 230000002706 hydrostatic effect Effects 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 2
- 230000009347 mechanical transmission Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D51/00—Motor vehicles characterised by the driver not being seated
- B62D51/04—Motor vehicles characterised by the driver not being seated the driver walking
- B62D51/06—Uniaxle walk-type tractors
-
- 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
- B60K17/105—Units comprising at least a part of the gearing and a torque-transmitting axle, e.g. transaxles
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D13/00—Steering specially adapted for trailers
- B62D13/02—Steering specially adapted for trailers for centrally-pivoted axles
- B62D13/025—Steering specially adapted for trailers for centrally-pivoted axles the pivoted movement being initiated by the coupling means between tractor and trailer
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Guiding Agricultural Machines (AREA)
- Power Steering Mechanism (AREA)
- Arrangement And Mounting Of Devices That Control Transmission Of Motive Force (AREA)
- Arrangement Or Mounting Of Control Devices For Change-Speed Gearing (AREA)
Description
G 8365 DE I I * IJ -Ra^i'd flaechiJhen und Fahrzeuge AGG 8365 DE II * IJ -Ra^i'd areas and vehicles AG
tfeimstrlße* 7tfeimstrße* 7
CH-8953 Dietikon /Schweiz - 1 -CH-8953 Dietikon /Switzerland - 1 -
Die vorliegende Erfindung betrifft eine Antriebssteuerung eines Einachstraktors mit hydrostatischem Fahrantrieb über zwei Hydraulikmotoren, von denen jeder auf ein Antriebsrad wirkt sowie mit einem separat lenkbaren vorgeschalteten oder einem über eine Deichsel angehängten Arbeitsgerät, wobei zwischen Hydrostat und den beiden Hydraulikmotoren eine regelbare Ventilanordnung eingeschaltet ist, über welche die Hydraulikmotoren derart mit Hydraulikflüssigkeit gespiesen werden, dass bei Geradeausfahrt beide die gleiche Füllung erhalten und bei Kurvenfahrt der kurveninnere Hydraulikmotor je nach Kurvenradius eine verminderte Füllung erhält. Die Ventilansteuerung funktioniert auch für Rückwärtsfahrt sinngemäss.The present invention relates to a drive control of a single-axle tractor with hydrostatic drive via two hydraulic motors, each of which acts on a drive wheel, and with a separately steerable upstream implement or one attached via a drawbar, whereby an adjustable valve arrangement is connected between the hydrostatic unit and the two hydraulic motors, via which the hydraulic motors are fed with hydraulic fluid in such a way that when driving straight ahead both receive the same filling and when cornering the hydraulic motor on the inside of the curve receives a reduced filling depending on the curve radius. The valve control also works in the same way when driving backwards.
Ein sicherer Betrieb des Einachstraktors unter gleichzeitiger Schonung des Terrains wird aber immer mehr gefordert, was nur durch eine geeignete Steuerung der Antriebsmotoren erreicht werden kann.However, safe operation of the single-axle tractor while protecting the terrain is increasingly required, which can only be achieved by appropriate control of the drive motors.
Beim Einsatz von Einachstraktoren insbesondere in schwierigem Gelände werden hohe Anforderungen an die Sicherheit und den Fahrkomfort gestellt, besonders dort, wo der Traktor mit einem vorgeschalteten oder mit einem mit einer festen Deichsel versehenen gezogenen Arbeitsgerät betrieben wird.When using single-axle tractors, particularly in difficult terrain, high demands are placed on safety and driving comfort, especially where the tractor is operated with a towed implement or with a towed implement with a fixed drawbar.
Diese Terrainschonung könnte erreicht werden, indem neben der Lenkung des Traktors gleichzeitig die Ventilanordnung gesteuert würde. Dies ist aber gerade beim Betrieb von Einachstraktoren kaum zumutbar, da oft die SchwierigkeitenThis protection of the terrain could be achieved by controlling the valve arrangement in addition to steering the tractor. However, this is hardly reasonable, especially when operating single-axle tractors, as the difficulties
des Geländes die volle Aufmerksamkeit erfordern und von einer zusätzlichen Bedienung der Ventilanordung abzusehen ist.of the terrain require full attention and additional operation of the valve arrangement should be avoided.
Aufgabe der vorliegenden Erfindung war es somit, eine Antriebssteuerung zu entwickeln, welche in der Praxis mit Erfolg eingesetzt werden kann, ohne an den Fahrer kaum erfüllbare Anforderungen zu stellen.The aim of the present invention was therefore to develop a drive control system that can be used successfully in practice without placing demands on the driver that are difficult to fulfill.
Diese Aufgabe wurde bei einer Antriebssteuerung eines Einachstraktors der eingangs definierten Art erfindungsgemäss dadurch gelöst, dass die Steuerung der Ventilanordnung und damit die Steuerung der Hydraulikmotoren des Traktors in Abhängigkeit des Lenkausschlages des Lenkholmes des vorgeschalteten bzw. der Deichselstellung bezüglich der Traktorlängsachse des gezogenen Arbeitsgerätes erfolgt. Vorzugsweise wird dabei die Stellung des Lenkholmes des vorgeschalteten bzw. der festen Deichsel des gezogenen Arbeitsgerätes mechanisch auf die Ventilanordnung übertragen, wobei diese mechanische Uebertragung der Steuerbewegungen z.B. über geeignet ausgebildete und angeordnete Steuergestänge erfolgt.This task was solved according to the invention in a drive control of a single-axle tractor of the type defined at the beginning in that the control of the valve arrangement and thus the control of the hydraulic motors of the tractor is carried out as a function of the steering deflection of the steering handle of the upstream or the drawbar position with respect to the tractor's longitudinal axis of the towed implement. Preferably, the position of the steering handle of the upstream or the fixed drawbar of the towed implement is mechanically transmitted to the valve arrangement, whereby this mechanical transmission of the control movements takes place, for example, via suitably designed and arranged control rods.
Die Erfindung wird nachstehend anhand eines in der Zeichnung dargestellten Ausführungsbeispiels noch etwas näher erläutert. Es zeigt:The invention is explained in more detail below using an embodiment shown in the drawing. It shows:
Fig. 1 eine rein schematische Darstellung eines mit einer erfindungsgemässen Antriebssteuerung ausgerüsteten Einachstraktors;Fig. 1 is a purely schematic representation of a single-axle tractor equipped with a drive control according to the invention;
Fig. 2 rein schematisch einen Einachstraktor mit vorgeschaltetem Arbeitsgerät mit über einen Lenkholm lenkbaren Laufrädern, undFig. 2 purely schematically shows a single-axle tractor with a front-mounted implement with wheels that can be steered via a handlebar, and
Pig. 3 eine ähnliche Ansicht wie Fig. 2 mit am Einachstraktor angehängtem Arbeitsgerät mit fester Deichsel.Pig. 3 a similar view to Fig. 2 with the implement attached to the two-axle tractor with a fixed drawbar.
Fig. 1 der Zeichnung zeigt rein schematisch einen Einachstraktor mit dem üblichen Verbrennungsmotor 1 als zentrales Antriebsorgan, der Kupplung 2, einer zweistufigen Zapfwellenschaltung 3 für eine Zapfwelle 12, einem Hydrauliköltank 4, einem Oelfilter 5, einer Füllpumpe 6 für einen Hydrostaten 13 {mit einstellbarer Leistung).Fig. 1 of the drawing shows a purely schematic view of a single-axle tractor with the usual combustion engine 1 as the central drive element, the clutch 2, a two-stage power take-off shaft circuit 3 for a power take-off shaft 12, a hydraulic oil tank 4, an oil filter 5, a filling pump 6 for a hydrostatic unit 13 (with adjustable power).
Die Antriebsräder 9 des Einachstraktors werden von je einem Hydraulikmotor 7 über einen Freilauf 8 angetrieben. Ferner sind ein Differential 11 und zwei individuelle Feststellbremsen 10 vorgesehen.The drive wheels 9 of the single-axle tractor are each driven by a hydraulic motor 7 via a freewheel 8. A differential 11 and two individual parking brakes 10 are also provided.
Zwischen dem Hydrostaten 13 und den beiden Hydraulikmotoren ist eine Ventilanordnung 14 vorgesehen, welche erlaubt, bei Geradeausfahrt des Traktors beide Hydraulikmotoren 7 mit gleicher Füllung zu betreiben (serielle Schaltung der beiden Motoren), jedoch bei Kurvenfahrt je nach Richtung und Kurvenradius einen der Motoren mit der Normalfüllung zu betreiben, den anderen Motor jedoch mit einer verminderten Füllung zu versehen (zwischen Normalfüllung und Null). Die normale Füllung ist am Hydrostaten 13 variierbar einzustellen.A valve arrangement 14 is provided between the hydrostat 13 and the two hydraulic motors, which allows both hydraulic motors 7 to be operated with the same filling when the tractor is travelling straight ahead (serial connection of the two motors), but when cornering, depending on the direction and curve radius, one of the motors is operated with the normal filling, but the other motor is provided with a reduced filling (between normal filling and zero). The normal filling can be variably set on the hydrostat 13.
Die Ventilanordnung 14 erlaubt über die Ventilkörper 15, 16 (von denen sich wahlweise jeweils einer in Normalbetriebs stellung für Geradeausfahrt befindet) den Füllungsgrad der Motoren 7 kontinuierlich oder stufenweise zu verstellen, je nach Position des Einstellhebels 17.The valve arrangement 14 allows the filling level of the motors 7 to be adjusted continuously or in stages via the valve bodies 15, 16 (one of which is optionally in the normal operating position for straight-ahead travel), depending on the position of the adjustment lever 17.
9 &PSgr; **··■ * &bgr; 9 Ψ **··■ * β
- 4- 4
Der Kern der Erfindung liegt nun darin, dass die Betätigung des Einstellhebels 17, d.h. die Steuerung der Ventilanordnung 14 und damit schliesslich die Steuerung der Hydraulikmotoren 7 des Traktors in Abhängigkeit des LenkausSchlages des Lenkholmes eines vorgeschalteten Arbeitsgerätes erfolgt, vorzugsweise über ein geeignetes Steuergestänge 18.The essence of the invention is that the actuation of the adjustment lever 17, i.e. the control of the valve arrangement 14 and thus ultimately the control of the hydraulic motors 7 of the tractor, takes place depending on the steering deflection of the steering bar of an upstream implement, preferably via a suitable control linkage 18.
Falls anstelle eines vorgeschalteten Arbeitsgerätes (fest mit dem Traktor verbunden, jedoch mit über einen Lenkholm steuerbaren Laufrädern) ein mit einer festen bzw. starren Deichsel versehenes angehängtes Arbeitsgerät zum Einsatz kommt, erfolgt die Steuerung der Ventilanordnung in Abhängigkeit der Deichselstellung bezüglich der Längsachse des Traktors, ebenfalls vorzugsweise mechanisch über ein geeignetes S teuerges tänge.If, instead of an upstream implement (fixed to the tractor, but with wheels that can be controlled via a handlebar), an attached implement with a fixed or rigid drawbar is used, the valve arrangement is controlled depending on the drawbar position in relation to the longitudinal axis of the tractor, also preferably mechanically via a suitable control linkage.
Diese beiden Varianten sind rein schematisch in Fig. 2 und 3 dargestellt.These two variants are shown purely schematically in Fig. 2 and 3.
Fig. 2 zeigt einen Einachstraktor 20 mit vorgeschaltetem Arbeitsgerät A, dessen Laufräder 21 über einen Lenkholm 22 steuerbar sind. Der Lenkausschlag des Lenkholms 22 wird dazu genutzt, über ein Gestänge 23 die Ventilanordnung 24 {Gerät 14 in Fig. 1) zu bedienen.Fig. 2 shows a single-axle tractor 20 with a front-mounted implement A, whose wheels 21 can be controlled via a steering handle 22. The steering deflection of the steering handle 22 is used to operate the valve arrangement 24 (implement 14 in Fig. 1) via a rod 23.
Dasselbe gilt für den Traktor 30 gemäss Fig. 3, an welchen ein Arbeitsgerät 32 mit starrer Deichsel 31 und Laufrädern 33 angehängt ist. Hier wird die Ventilanordnung 34 über ein Steuergestänge 34'mechanisch in Abhängigkeit der Stellung der Deichsel 31 bezüglich der Traktorlängsachse betätigt. Sobald der Traktor über dessen Holme 35 aus der eingenommenen Fahrrichtung gezwungen wird, wird die Deichsel 31 gegenüber der Traktorlängsachse um den Winkel &agr; verschwenkt und damit der Antrieb der Traktorräder 9 beeinflusst.The same applies to the tractor 30 according to Fig. 3, to which a working device 32 with a rigid drawbar 31 and wheels 33 is attached. Here, the valve arrangement 34 is mechanically actuated via a control rod 34' depending on the position of the drawbar 31 with respect to the tractor's longitudinal axis. As soon as the tractor is forced out of the assumed direction of travel via its bars 35, the drawbar 31 is pivoted by the angle α with respect to the tractor's longitudinal axis, thus influencing the drive of the tractor wheels 9.
Claims (4)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH165194A CH689015A5 (en) | 1994-05-27 | 1994-05-27 | Transmission control system for single-axle tractor |
Publications (1)
Publication Number | Publication Date |
---|---|
DE29504612U1 true DE29504612U1 (en) | 1995-05-11 |
Family
ID=4215445
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE29504612U Expired - Lifetime DE29504612U1 (en) | 1994-05-27 | 1995-03-17 | Drive control of a single-axle tractor |
Country Status (3)
Country | Link |
---|---|
AT (1) | AT621U1 (en) |
CH (1) | CH689015A5 (en) |
DE (1) | DE29504612U1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19721623A1 (en) * | 1997-05-23 | 1998-11-26 | Agria Werke Gmbh | Vehicle with hydraulic single wheel drive |
DE102008010335A1 (en) * | 2008-02-21 | 2009-09-03 | Agria-Werke Gmbh | Steering device for a vehicle with hydraulic independent wheel drive, such vehicles and method for steerable driving a vehicle |
EP2548788A1 (en) * | 2011-07-19 | 2013-01-23 | BCS S.p.A. | Single-axle agricultural machine with improved control |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU5491700A (en) * | 1999-06-14 | 2001-01-02 | Textron Inc. | Dual-path single-pump hydrostatic drive for mower |
EP1452381B1 (en) * | 2003-02-09 | 2006-09-20 | Rapid Technic AG | Control for a hydraulic drive |
US20050193733A1 (en) * | 2003-11-20 | 2005-09-08 | Donald Ochs | Hydraulic powertrain systems for a vehicle including hydraulically and auxiliary powered air injection |
-
1994
- 1994-05-27 CH CH165194A patent/CH689015A5/en not_active IP Right Cessation
-
1995
- 1995-03-14 AT AT13795U patent/AT621U1/en not_active IP Right Cessation
- 1995-03-17 DE DE29504612U patent/DE29504612U1/en not_active Expired - Lifetime
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19721623A1 (en) * | 1997-05-23 | 1998-11-26 | Agria Werke Gmbh | Vehicle with hydraulic single wheel drive |
EP0879753A3 (en) * | 1997-05-23 | 2000-04-12 | Agria-Werke GmbH | Vehicle with hydraulic individual wheel drive |
DE102008010335A1 (en) * | 2008-02-21 | 2009-09-03 | Agria-Werke Gmbh | Steering device for a vehicle with hydraulic independent wheel drive, such vehicles and method for steerable driving a vehicle |
DE102008010335B4 (en) * | 2008-02-21 | 2012-03-15 | Agria-Werke Gmbh | Steering device for a vehicle with hydraulic independent wheel drive, such vehicles and method for steerable driving a vehicle |
EP2548788A1 (en) * | 2011-07-19 | 2013-01-23 | BCS S.p.A. | Single-axle agricultural machine with improved control |
CN102884881A (en) * | 2011-07-19 | 2013-01-23 | Bcs股份公司 | Single-axle agricultural machine with improved control |
CN102884881B (en) * | 2011-07-19 | 2016-04-13 | Bcs股份公司 | Control the single shaft agricultural machinery be improved |
Also Published As
Publication number | Publication date |
---|---|
AT621U1 (en) | 1996-02-26 |
CH689015A5 (en) | 1998-07-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R207 | Utility model specification |
Effective date: 19950622 |
|
R150 | Utility model maintained after payment of first maintenance fee after three years |
Effective date: 19980424 |
|
R151 | Utility model maintained after payment of second maintenance fee after six years |
Effective date: 20010424 |
|
R152 | Utility model maintained after payment of third maintenance fee after eight years |
Effective date: 20030212 |
|
R071 | Expiry of right |