EP0981078B1 - Manual control device - Google Patents

Manual control device Download PDF

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Publication number
EP0981078B1
EP0981078B1 EP99115474A EP99115474A EP0981078B1 EP 0981078 B1 EP0981078 B1 EP 0981078B1 EP 99115474 A EP99115474 A EP 99115474A EP 99115474 A EP99115474 A EP 99115474A EP 0981078 B1 EP0981078 B1 EP 0981078B1
Authority
EP
European Patent Office
Prior art keywords
operating lever
manual operating
activating element
signals
actuating
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
Application number
EP99115474A
Other languages
German (de)
French (fr)
Other versions
EP0981078A2 (en
EP0981078A3 (en
Inventor
Dieter Rückert
Tilo Kempf
Jörg Höfle
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.)
Deere and Co
Original Assignee
Deere and Co
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Filing date
Publication date
Application filed by Deere and Co filed Critical Deere and Co
Publication of EP0981078A2 publication Critical patent/EP0981078A2/en
Publication of EP0981078A3 publication Critical patent/EP0981078A3/en
Application granted granted Critical
Publication of EP0981078B1 publication Critical patent/EP0981078B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G5/00—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member
    • G05G5/005—Means for preventing, limiting or returning the movements of parts of a control mechanism, e.g. locking controlling member for preventing unintentional use of a control mechanism
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G9/00—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously
    • G05G9/02—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only
    • G05G9/04—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously
    • G05G9/047—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously the controlling member being movable by hand about orthogonal axes, e.g. joysticks
    • G05G2009/04774—Manually-actuated control mechanisms provided with one single controlling member co-operating with two or more controlled members, e.g. selectively, simultaneously the controlling member being movable in different independent ways, movement in each individual way actuating one controlled member only in which movement in two or more ways can occur simultaneously the controlling member being movable by hand about orthogonal axes, e.g. joysticks with additional switches or sensors on the handle
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20012—Multiple controlled elements
    • Y10T74/20201—Control moves in two planes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20396—Hand operated
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20582—Levers
    • Y10T74/20612—Hand

Definitions

  • the invention relates to a hand control lever, in particular for the operating platform of a vehicle, with at least one electrical actuator for delivering control signals to at least one work function in response to pivoting of the hand control lever and / or in response to the operation of at least one arranged on the hand control lever actuator.
  • a selector lever for motor vehicle transmission is shown in which are provided to prevent inadvertent switching in certain speed steps fuses, which are represented by a backdrop with scenes stages.
  • a locking element usually a guided in the shift lever rod locking rod, which locks in this way the selector lever or prevents that can be changed to another gear.
  • the locking rod can be over a Move actuator on the handle of the selector lever from the scenes stages and then releases the selector lever. To avoid noise after releasing the push button, the return movement of the locking element is damped.
  • a hand control element according to the preamble of claim 1 is known for example from GB 2 248 102 A.
  • a hand control element according to the preamble of claim 1 is known for example from GB 2 248 102 A.
  • the object of the invention is based is to provide a hand control lever of the type mentioned in such a way that the risk of accidental release of work functions is easily avoided and / or that the operation of the work function is disabled under certain circumstances.
  • At least one manually activatable activation element communicating with at least one electrical switching element is provided in the region of the actuating handle of the hand control lever.
  • the switching element cooperates with an electrical locking control unit or a locking logic in order to activate or deactivate the at least one actuating transducer of the hand control lever in response to actuations of the activating element for the purpose of outputting control signals.
  • the locking control unit can be designed so that control signals are forwarded by the control only to the work function, if previously the activation element is actuated deliberately. Otherwise, there is a suppression of the control signals.
  • the hand control lever is designed in the manner of a joystick, which can be pivoted about a universal joint in two directions and is urged by spring force into its middle neutral position. At least one actuating transducer is provided for influencing at least one associated work function for each pivoting direction.
  • Joystick-like control levers allow easy operation of multiple work functions.
  • a hand control lever in the manner of a joystick for the operation of a loader, in particular the loader of an agricultural or industrial work vehicle considered.
  • the loader boom of the loader can be lowered or raised, and by lateral movements of the joystick, for example, a blade or other tool of the loader can be tilted.
  • an unintentional and unexpected operation of the loader boom and the tool must be avoided because people could be in the loader, so that here the present invention can develop their benefits particularly effective.
  • the rocker element in the region of the actuating handle, which is connected to at least one actuating transducer designed as a potentiometer for generating a control signal corresponding to the rocking position of the rocker element.
  • the patentiometer can be included in the locking strategy according to the invention.
  • a potentiometer is sufficient, which is responsible for both Wippidesen and the output signal is calibrated for the rest position of the rocker element as a zero signal.
  • it can also be provided for each of the two Wippraumen depending on a potentiometer.
  • the rocker switch for example, the oil flow of a hydraulically operated work function can be adjusted proportionally to the rocking position.
  • the work function may be a hydraulic accessory connected to the vehicle (gripper, lift, rotating mechanism).
  • a particularly advantageous embodiment of the hand control lever according to the invention results from the fact that the activation element is articulated via a pivot axis movable on the hand control lever.
  • the at least one actuating transducer is only activated for the delivery of control signals to the working functions, when the activation element is deflected by hand from its rest position against a small force (eg., Spring force, gravity).
  • a small force eg., Spring force, gravity
  • the activation element is designed like a flap and articulated in the region of the shaft-side end of the actuating handle via a transverse axis to the longitudinal axis of the pivot axis of the hand control lever.
  • the hand lever is such that the activation element has a substantially L-shaped cross-section, wherein the end of the first leg is hinged to the hand control lever and the end of the second leg ends with unactuated activation element near the free end of the actuating handle and does not protrude beyond this.
  • the second leg runs in the vicinity and substantially parallel to the operating handle. To grasp the operating handle, the hand must be pushed between the operating handle and the activating element. This is only possible because of the proximity between the second leg and the operating handle, when the second leg pivots away from the operating handle, wherein the associated switching element is triggered.
  • the activation element in the vicinity of its pivot point for example, formed as a projection, actuator, which cooperates with an actuating pin of the switching element, so that upon pivoting of the activation element from its unactuated rest position, the switching element is actuated to deliver control signals to a lock control unit.
  • control unit which evaluates the signals of the at least one actuating transducer and the at least one switching element.
  • the control unit contains a lock control unit and outputs control signals to the corresponding work functions as a function of the cited signals while observing a suitable locking strategy.
  • an electrical control device which receives and evaluates the signals of at least one actuating transducer, which responds to pivoting of the hand control lever, as well as the signals of the at least one switching element associated with the locking element.
  • the control unit accepts an activation of the at least one actuation converter, that is to say a forwarding of signals the actuator to the associated work function, only if the activation element is triggered (actuated), while the manual control lever is in its neutral position. However, if the manual control lever is initially in a position other than its neutral position, the actuating converter is not activated when the activation element is actuated. The activation is thus possible only from the neutral position of the hand lever.
  • the safety-relevant advantage that a movement of the work function (eg front loader) can only be caused when the manual control lever is moved, but not when, for example, the ignition of the vehicle is switched on when the hand control lever is deflected.
  • the activated hand lever is pivoted from its neutral position, the activation is maintained even when the activation element returns to its rest position.
  • a preferred embodiment of the invention provides, however, that the control unit cancels the activation when the activation element is in its rest position (because it was released) and the hand control lever returns to its neutral position and there remains longer than a first predetermined time interval.
  • the first time interval can be, for example, up to 2 seconds, preferably about 0.5 seconds.
  • the invention provides that the control unit cancels the activation when the manual control lever returns to the neutral position when the activation element is actuated and remains here longer than a second predeterminable time interval.
  • the second time interval is preferably up to 3 minutes, preferably about 1 minute. However, if the neutral position is traversed only briefly, the activation remains.
  • hand lever 10 is a center-centered by spring force joystick-like lever, which by means of a universal joint 12, not shown in two directions, fore and aft (x) and to the left and right (y) , can pivot.
  • the manual control lever 10 consists essentially of an operating handle 14, a central console 16 and a subsequent down to the console 16 lever shaft 18, at the lower end of the universal joint 12 is located.
  • actuating transducer potentiometer
  • actuating handle 14 On the upward-facing end face of the actuating handle 14 are two manually operable actuators 20, 22, which form with associated, not shown electrical actuation converters two pressure switch. With the actuators 20, 22, the operator control signals (z 1 , z 2 ) trigger, for example, to switch between different additional functions.
  • a manually operable rocker 24 is arranged with an upper rocker arm 26 and a lower rocker arm 28.
  • the rocker 24 is associated with a not shown, designed as a potentiometer actuator actuator that outputs control signals to auxiliary devices that are proportional to the rocker position.
  • a flap-shaped activation element 34 (safety flap) is pivotably articulated to the console 16 via a pivot axis 32 extending transversely to the lever longitudinal axis 30, which by means of a spring, not shown, with low spring force in its rest position shown in FIG is urged.
  • the activation element 34 has a substantially L-shaped cross section with two legs 36, 38.
  • the free end of the first leg 36 forms with the pivot axis 32, the pivot point of the activation element 34.
  • the second leg 38 runs at an acute angle to the lever longitudinal axis 30 and terminates near the upper free end of the actuating handle 14.
  • the free rounded end of the second leg 38 does not protrude beyond the front side of the operating handle 14 and thus offers no possibility of attack for accidental deflection.
  • a downwardly extending projection 40 is formed. This acts with the actuating pin 42 of a micro switch designed as a switching element 44 which is urged by the force of a spring in the direction of projection 40. In the illustrated rest position, the projection 40 does not engage the actuating pin 42, so that the latter does not trigger a switching signal (s) of the switching element 44.
  • the operator To grasp the operating handle 14, the operator pushes his fingers between the activation element 34 and the operating handle 14 and pushes the activation element 34 from its illustrated rest position to the left (with respect to FIG. 1). At the same time, the projection 40 presses against the actuating pin 42 and triggers a switching function in the switching element 44. If the operator takes her hand away from the operating handle 14, the activating element 34 pivots back into its basic position as a result of spring force. In this case, the switching element 44 is switched back and outputs no switching signal.
  • a tilt switch 45 indicated in Fig. 2 is further arranged, which can be tilted between ON and OFF.
  • the toggle switch 45 By the toggle switch 45, the manual control lever 10 can be switched to its ready state.
  • Fig. 2 the manual control lever 10 with its actuators (potentiometer of the lever shaft 18, pressure switch 20, 22, potentiometer of the rocker element 24, switching element 44) is indicated as a block.
  • the signals of the actuation transducers are evaluated by a control unit 46, which outputs control signals to actuators 48, 50, 52 in accordance with an evaluation algorithm.
  • the actuators 48, 50, 52 control associated hydraulic valves 54, 56, 58 of work functions.
  • the valves 54, 56, 58 are, for example, electro-hydraulic control valves of a Front loader.
  • valve 54 affects the raising and lowering of a loader boom, not shown, the valve 56, the tilting of a gripper articulated at the free end of the loader boom and the valve 58, the opening and closing of the gripper.
  • the control of a hydraulic auxiliary device by the rocker 24 was not shown in Fig. 2 in detail.
  • the pressure switches 20 and 22 can serve the switching between various additional functions.
  • the evaluation of the signals takes place in the control unit 46 using an algorithm.
  • An algorithm suitable for carrying out the present invention is explained below with reference to the flowchart shown in FIG.
  • step 102 the manual control lever 10 is not yet activated, that is, the controller 46 does not convert the signals of the actuation transducers 20, 22, 24, 44 into control signals for the working functions.
  • step 104 the query is whether the hand control lever assumes its neutral position and whether the activation element 34 is in its rest position. As long as these two conditions are not met, the algorithm repeats the query of step 104 at regular intervals.
  • step 104 the algorithm proceeds to step 106, where it is queried whether the activation element 34 has been actuated in the meantime and has left its rest position. As long as this is not the case, step 106 repeats its query at regular intervals. If an activation of the activation element 34 is detected by step 106, the algorithm proceeds to step 108, through which the manual control lever 10 is activated. The hand control lever 10 is now in its working state in which, depending on its pivoting control signals are issued to associated work functions.
  • step 110 the query is whether the hand lever 10 is in its neutral position. If this is not the case, then the activation of the manual control lever 10 is maintained and the query of step 110 is repeated at regular time intervals. Here, the manual operating lever remains in its working state even when the activation element is released and returns to its rest position.
  • step 110 determines whether the handset lever 10 is in its neutral position. If it is determined in step 110 that the handset lever 10 is in its neutral position, the algorithm proceeds to step 112 where it is queried that the activation element 34 is still actuated. If the answer of step 112 is affirmative, the algorithm proceeds to step 114, where it is checked whether the activation element 34 has been continuously pressed during the last full minute. If so, in step 116 the handset lever 10 is deactivated and the algorithm is returned to step 104. This has the consequence that in a manual control lever 10 in the neutral position, this only remains activated if the activation element 34 has not been operated for more than one minute. Otherwise, the activation is canceled. This prevents the activation element 34 is blocked in an inadmissible manner without the operator takes the handset lever 10 and simultaneously actuates the activation element 34 with her hand.
  • step 114 If the answer in step 114 is negative, d. H. the activation element was not actuated continuously during the last minute while the operating lever 10 was in its neutral position, then the algorithm returns to step 110 and the manual control lever 10 remains activated.
  • Step 118 it is queried whether the activation element has not been actuated during the last half second. If so, in step 116 the handset lever 10 is deactivated and the algorithm is returned to step 104. Otherwise, the algorithm returns to step 110. This has the consequence that with unconfirmed activation element 34 of the manual control lever 10 can only be moved through its neutral position for a short time, without being automatically deactivated. If, however, it remains in its neutral position with unactivated activation element 34 for a longer time (longer than 0.5 seconds), it is deactivated. In this case, the polling loop must be run again beginning at step 104.
  • signals from other actuation transducers for example the signals of the pressure switches 20, 22 and / or the rocker switch 24, can also be included in the interlocking.

Description

Die Erfindung betrifft einen Handbedienungshebel, insbesondere für die Bedienungsplattform eines Fahrzeugs, mit wenigstens einem elektrischen Betätigungswandler zur Abgabe von Steuersignalen an wenigstens eine Arbeitsfunktion in Abhängigkeit eines Verschwenkens des Handbedienungshebels und/oder in Abhängigkeit der Betätigung wenigstens eines auf dem Handbedienungshebels angeordneten Betätigungselements.The invention relates to a hand control lever, in particular for the operating platform of a vehicle, with at least one electrical actuator for delivering control signals to at least one work function in response to pivoting of the hand control lever and / or in response to the operation of at least one arranged on the hand control lever actuator.

Zur Betätigung von Arbeitsfunktionen befinden sich auf der Bedienungsplattform von Arbeitsfahrzeugen häufig eine Vielzahl von Handbedienungshebel. Diese Hebel können beispielsweise der Bedienung von Arbeitsgeräten, wie Frontlader, dienen. In zunehmendem Maße wirken diese Hebel nicht mehr über mechanische Gestänge auf die Arbeitsfunktionen ein, sondern enthalten Schalter oder andere elektrische Betätigungswandler, die in Abhängigkeit von Betätigungen des Handbedienungshebels elektrische Steuersignale abgeben, um die Arbeitsfunktionen wunschgemäß anzusteuern. Ein moderner Handbetätigungshebel ist relativ leichtgängig und läßt sich mit geringem Kraftaufwand betätigen. Dadurch nimmt die Gefahr einer ungewollten Betätigung und Ansteuerung der Arbeitsfunktionen zu. Beispielsweise kann eine versehentliche Betätigung dadurch erfolgen, daß die Bedienungsperson mit einem Kleidungsstück an dem Handbetätigungshebel hängen bleibt und diesen unbemerkt verschwenkt. Durch eine ungewollte Betätigung des Handbetätigungshebels können Arbeitsfunktionen unerwartet ausgelöst werden, was Gefahren mit sich bringen kann.For operating work functions, there are often a variety of hand control levers on the operator platform of work vehicles. These levers can serve, for example, the operation of implements such as front loaders. Increasingly, these levers no longer act via mechanical linkage on the work functions, but contain switches or other electrical actuation converter, which emit electrical control signals in response to actuations of the hand control lever to control the work functions as desired. A modern hand lever is relatively smooth and can be operated with little effort. As a result, the risk of unintentional operation and control of the work functions increases. For example, an accidental operation can be done by the operator with a garment hanging on the hand lever and this pivots unnoticed. Unintentional actuation of the manual override lever can cause work to be triggered unexpectedly, which can be dangerous.

Aus der DE-A-44 27 695 geht ein Wählhebel für Kraftfahrzeuggetriebe hervor, bei dem zur Verhinderung eines unbeabsichtigten Schaltens in bestimmte Fahrstufen Sicherungen vorgesehen sind, die durch eine Kulisse mit Kulissenstufen dargestellt werden. In die Kulissenstufen greift ein Rastelement, in der Regel eine in der Schalthebelstange geführte Raststange ein, die auf diese Weise den Wählhebel verriegelt bzw. verhindert, daß in eine andere Fahrstufe gewechselt werden kann. Die Raststange läßt sich über ein Betätigungselement am Schaltgriff des Wählhebels aus den Kulissenstufen herausbewegen und gibt dann den Wählhebel frei. Um eine Geräuschentwicklung nach dem Loslassen der Drucktaste zu vermeiden, wird die Rückstellbewegung des Rastelements gedämpft.From DE-A-44 27 695 a selector lever for motor vehicle transmission is shown in which are provided to prevent inadvertent switching in certain speed steps fuses, which are represented by a backdrop with scenes stages. In the scenes stages engages a locking element, usually a guided in the shift lever rod locking rod, which locks in this way the selector lever or prevents that can be changed to another gear. The locking rod can be over a Move actuator on the handle of the selector lever from the scenes stages and then releases the selector lever. To avoid noise after releasing the push button, the return movement of the locking element is damped.

Ein Handbedienungselement gemäß dem Oberbegriff des Patentanspruchs 1 ist beispielsweise aus der GB 2 248 102 A bekannt.A hand control element according to the preamble of claim 1 is known for example from GB 2 248 102 A.

Ein Handbedienungselement gemäß dem Oberbegriff des Patentanspruchs 1 ist beispielsweise aus der GB 2 248 102 A bekannt.A hand control element according to the preamble of claim 1 is known for example from GB 2 248 102 A.

Die der Erfindung zugrunde liegende Aufgabe wird darin gesehen, einen Handbedienungshebel der eingangs genannten Art derart auszubilden, daß die Gefahr eines ungewollten Auslösens von Arbeitsfunktionen auf einfache Weise vermieden wird und/oder daß die Betätigung der Arbeitsfunktion unter bestimmten Umständen gesperrt wird.The object of the invention is based is to provide a hand control lever of the type mentioned in such a way that the risk of accidental release of work functions is easily avoided and / or that the operation of the work function is disabled under certain circumstances.

Die Aufgabe wird erfindungsgemäß durch die Lehre des Patentanspruchs 1 gelöst. Weitere vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung gehen aus den Unteransprüchen hervor.The object is achieved by the teaching of claim 1. Further advantageous embodiments and modifications of the invention will become apparent from the dependent claims.

Erfindungsgemäß ist im Bereich des Betätigungsgriffs des Handbedienungshebels wenigstens ein von Hand betätigbares mit wenigstens einem elektrischen Schaltelement in Verbindung stehendes Aktivierungselement vorgesehen. Das Schaltelement wirkt mit einer elektrischen Verriegelungssteuereinheit bzw. einer Verriegelungslogik zusammen, um in Abhängigkeit von Betätigungen des Aktivierungselements den wenigstens einen Betätigungswandler des Handbedienungshebels zur Abgabe von Steuersignalen zu aktivieren bzw. deaktivieren.According to the invention, at least one manually activatable activation element communicating with at least one electrical switching element is provided in the region of the actuating handle of the hand control lever. The switching element cooperates with an electrical locking control unit or a locking logic in order to activate or deactivate the at least one actuating transducer of the hand control lever in response to actuations of the activating element for the purpose of outputting control signals.

Die Verriegelungssteuereinheit kann dabei so ausgelegt sein, daß Steuersignale von dem Steuerelement nur dann an die Arbeitsfunktion weitergeleitet werden, wenn zuvor das Aktivierungselement bewußt betätigt wird. Andernfalls erfolgt eine Unterdrückung der Steuersignale.The locking control unit can be designed so that control signals are forwarded by the control only to the work function, if previously the activation element is actuated deliberately. Otherwise, there is a suppression of the control signals.

Die Abgabe von Steuersignalen an Arbeitsfunktionen erfordert somit sowohl eine Betätigung des Handbedienungshebels oder eines Betätigungselements als auch des Aktivierungslements. Mit einer zweckmäßigen Anordnung des Aktivierungselements wird es sehr unwahrscheinlich, daß die beiden genannten Betätigungen zur gleichen Zeit ungewollt und unbewußt erfolgen. Die Gefahr einer versehentlichen Bedienung wird damit praktisch ausgeschlossen.The delivery of control signals to work functions thus requires both an operation of the hand control lever or an actuating element and the Aktivierungslements. With an appropriate arrangement of the activation element, it is very unlikely that the two operations mentioned at the same time take place unintentionally and unconsciously. The risk of accidental operation is thus virtually eliminated.

Vorzugsweise ist der Handbedienungshebel nach Art eines Joysticks ausgebildet, der sich um ein Kreuzgelenk in zwei Richtungen verschwenken läßt und durch Federkraft in seine mittlere Neutralstellung gedrängt wird. Für jede Schwenkrichtung ist wenigstens ein Betätigungswandler zur Beeinflussung wenigstens einer zugehörigen Arbeitsfunktion vorgesehen. Joystickartig ausgebildete Bedienungshebel lassen eine einfache Bedienung mehrerer Arbeitsfunktionen zu.Preferably, the hand control lever is designed in the manner of a joystick, which can be pivoted about a universal joint in two directions and is urged by spring force into its middle neutral position. At least one actuating transducer is provided for influencing at least one associated work function for each pivoting direction. Joystick-like control levers allow easy operation of multiple work functions.

Als besonders vorteilhaft wird die Verwendung eines Handbedienungshebels nach Art eines Joysticks für die Betätigung eines Laders, insbesondere des Laders eines landwirtschaftlichen oder industriellen Arbeitsfahrzeugs, angesehen. Durch eine Vor- und Rückbewegung des Joysticks kann der Laderbaum des Laders abgesenkt bzw. angehoben werden, und durch seitliche Bewegungen des Joysticks kann beispielsweise eine Schaufel oder ein anderes Werkzeug des Laders verkippt werden. Insbesondere bei dieser Anwendung muß eine unbeabsichtigte und unerwartete Betätigung des Laderbaums und des Werkzeugs vermieden werden, da sich Personen im Bereich des Laders aufhalten könnten, so daß hier die vorliegende Erfindung ihre Vorzüge besonders wirkungsvoll entfalten kann.Particularly advantageous is the use of a hand control lever in the manner of a joystick for the operation of a loader, in particular the loader of an agricultural or industrial work vehicle considered. By a forward and backward movement of the joystick, the loader boom of the loader can be lowered or raised, and by lateral movements of the joystick, for example, a blade or other tool of the loader can be tilted. In particular, in this application, an unintentional and unexpected operation of the loader boom and the tool must be avoided because people could be in the loader, so that here the present invention can develop their benefits particularly effective.

Es sind Handbedienungshebel bekannt, die im Bereich des Betätigungsgriffs mit Druckschaltern bestückt sind, welche mit als Schaltelement ausgebildeten Betätigungswandler zusammenwirken. Es ist von Vorteil, diese Druckschalter in die erfindungsgemäße Verriegelungsstrategie einzubeziehen. Solche Druckschalter lassen sich beispielsweise ebenfalls zur Bedienung eines Laders verwenden und können dazu dienen, einen Lifter zum Anheben des Laderwerkzeugs zu betätigen oder einen am Lader montierten Greifer zu schließen bzw. zu öffnen.There are hand control lever known, which are equipped in the region of the operating handle with pressure switches, which cooperate with trained as a switching element actuator. It is advantageous to include these pressure switches in the locking strategy according to the invention. Such pressure switches can also be used, for example, to operate a loader and can be used to actuate a lifter for lifting the loading tool or a close or open the gripper mounted on the loader.

Desweiteren kann es von Vorteil sein, im Bereich des Betätigungsgriffs wenigstens ein Wippelement vorzusehen, welches mit wenigstens einem als Potentiometer ausgebildeten Betätigungswandler zur Erzeugung eines der Wippstellung des Wippelements entsprechenden Steuersignals in Verbindung steht. Dabei kann das Patentiometer in die erfindungsgemäße Verriegelungsstrategie einbezogen sein. Gewöhnlich genügt ein Potentiometer, das für beide Wipprichtungen zuständig ist und dessen Ausgangssignal für die Ruhestellung des Wippelements als Nullsignal geeicht wird. Es kann jedoch auch für jede der beiden Wipprichtungen je ein Potentiometer vorgesehen sein. Durch Betätigung des Wippschalters läßt sich beispielsweise der Ölstrom einer hydraulisch betätigten Arbeitsfunktion proportional zur Wippstellung einstellen. Bei der Arbeitsfunktion kann es sich um ein an das Fahrzeug angeschlossenes hydraulisches Zusatzgerät (Greifer, Lift, Drehmechanismus) handeln.Furthermore, it may be advantageous to provide at least one rocker element in the region of the actuating handle, which is connected to at least one actuating transducer designed as a potentiometer for generating a control signal corresponding to the rocking position of the rocker element. In this case, the patentiometer can be included in the locking strategy according to the invention. Usually a potentiometer is sufficient, which is responsible for both Wipprichtungen and the output signal is calibrated for the rest position of the rocker element as a zero signal. However, it can also be provided for each of the two Wipprichtungen depending on a potentiometer. By actuating the rocker switch, for example, the oil flow of a hydraulically operated work function can be adjusted proportionally to the rocking position. The work function may be a hydraulic accessory connected to the vehicle (gripper, lift, rotating mechanism).

Eine besonders vorteilhafte Ausgestaltung des erfindungsgemäßen Handbedienungshebels ergibt sich dadurch, daß das Aktivierungselement über eine Schwenkachse beweglich am Handbedienungshebel angelenkt ist. Der wenigstens eine Betätigungswandler wird dabei nur dann zur Abgabe von Steuersignalen an die Arbeitsfunktionen aktiviert, wenn das Aktivierungselement mit der Hand aus seiner Ruhelage gegen eine geringe Kraft (z. B. Federkraft, Schwerkraft) ausgelenkt wird. Die Auslenkung und das Halten in ausgelenkter Stellung erfordert keine nennenswerte Kraftanstrengung, so daß die Bedienungsperson sich nicht durch die Betätigung des Aktivierungselements beeinträchtigt fühlt.A particularly advantageous embodiment of the hand control lever according to the invention results from the fact that the activation element is articulated via a pivot axis movable on the hand control lever. The at least one actuating transducer is only activated for the delivery of control signals to the working functions, when the activation element is deflected by hand from its rest position against a small force (eg., Spring force, gravity). The deflection and the hold in the deflected position requires no appreciable effort, so that the operator does not feel impaired by the actuation of the activation element.

Gemäß einer bevorzugten Weiterbildung der Erfindung ist das Aktivierungselement klappenförmig ausgebildet und im Bereich des schaftseitigen Endes des Betätigungsgriffs über eine quer zur Hebellängsachse verlaufende Schwenkachse an dem Handbedienungshebel angelenkt. Erfindungsgemäß ist der Handbedienungshebel derart, ausgebildet, daß das Aktivierungselement einen im wesentlichen L-förmigen Querschnitt aufweist, wobei das Ende des ersten Schenkels am Handbedienungshebel angelenkt ist und das Ende des zweiten Schenkels bei unbetätigtem Aktivierungelement nahe des freien Endes des Betätigungsgriffs endet und nicht über dieses hinausragt. Der zweite Schenkel verläuft dabei in der Nähe und im wesentlichen parallel zum Betätigungsgriff. Zum Ergreifen des Betätigungsgriffs muß die Hand zwischen den Betätigungsgriff und das Aktivierungselement geschoben werden. Dies ist wegen der Nähe zwischen dem zweiten Schenkel und dem Betätigungsgriff nur möglich, wenn der zweite Schenkel vom Betätigungsgriff wegschwenkt, wobei das zugehörige Schaltelement ausgelöst wird.According to a preferred embodiment of the invention, the activation element is designed like a flap and articulated in the region of the shaft-side end of the actuating handle via a transverse axis to the longitudinal axis of the pivot axis of the hand control lever. According to the invention the hand lever is such that the activation element has a substantially L-shaped cross-section, wherein the end of the first leg is hinged to the hand control lever and the end of the second leg ends with unactuated activation element near the free end of the actuating handle and does not protrude beyond this. The second leg runs in the vicinity and substantially parallel to the operating handle. To grasp the operating handle, the hand must be pushed between the operating handle and the activating element. This is only possible because of the proximity between the second leg and the operating handle, when the second leg pivots away from the operating handle, wherein the associated switching element is triggered.

Vorzugsweise weist das Aktivierungselement in der Nähe seiner Anlenkstelle ein, beispielsweise als Vorsprung ausgebildetes, Betätigungsglied auf, das mit einem Betätigungsbolzen des Schaltelements zusammenwirkt, so daß bei einem Ausschwenken des Aktivierungselements aus seiner unbetätigten Ruhelage das Schaltelement betätigt wird, um Steuersignale an eine Verriegelungssteuereinheit abzugeben.Preferably, the activation element in the vicinity of its pivot point, for example, formed as a projection, actuator, which cooperates with an actuating pin of the switching element, so that upon pivoting of the activation element from its unactuated rest position, the switching element is actuated to deliver control signals to a lock control unit.

Es ist von Vorteil, ein elektrisches Steuergerät vorzusehen, das die Signale des wenigstens einen Betätigungswandlers und des wenigstens einen Schaltelements auswertet. Das Steuergerät enthält eine Verriegelungssteuereinheit und gibt in Abhängigkeit der genannten Signale unter Beachtung einer geeigneten Verriegelungsstrategie Steuersignale an die zugehörigen Arbeitsfunktionen abgibt.It is advantageous to provide an electrical control unit which evaluates the signals of the at least one actuating transducer and the at least one switching element. The control unit contains a lock control unit and outputs control signals to the corresponding work functions as a function of the cited signals while observing a suitable locking strategy.

Einer bevorzugten Weiterbildung der Erfindung zufolge ist ein elektrisches Steuergerät vorgesehen, das die Signale wenigstens eines Betätigungswandlers, der auf ein Verschwenken des Handbedienungshebels anspricht, sowie die Signale des wenigstens einen mit dem Verriegelungselement in Verbindung stehenden Schaltelements empfängt und auswertet. Das Steuergerät nimmt eine Aktivierung des wenigstens einen Betätigungswandlers, das heißt eine Weiterleitung von Signalen des Betätigungswandler an die zugehörige Arbeitsfunktion, nur dann vor, wenn das Aktivierungelement ausgelöst (betätigt) wird, während sich der Handbedienungshebel in seiner Neutralstellung befindet. Befindet sich der Handbedienungshebel anfangs jedoch in einer anderen Stellung als seiner Neutralstellung, so wird bei einer Betätigung des Aktivierungselements der Betätigungswandler nicht aktiviert. Die Aktivierung ist somit nur von der Neutralstellung des Handbedienungshebels aus möglich. Dies hat den sicherheitsrelevanten Vorteil, daß eine Bewegung der Arbeitsfunktion (z. B. Frontlader) nur dann hervorgerufen werden kann, wenn der Handbedienungshebel bewegt wird, nicht aber, wenn beispielsweise bei ausgelenktem Handbedienungshebel die Zündung des Fahrzeugs eingeschaltet wird.
Wenn der aktivierte Handbedienungshebel aus seiner Neutralstellung verschwenkt wird, bleibt die Aktivierung auch dann aufrechterhalten, wenn das Aktivierungselement in seine Ruhelage zurückkehrt. Eine bevorzugte Ausgestaltung der Erfindung sieht jedoch vor, daß das Steuergerät die Aktivierung aufhebt, wenn sich das Aktivierungselement in seiner Ruhestellung befindet (weil es losgelassen wurde) und der Handbedienungshebel in seine Neutralstellung zurückkehrt und dort länger als ein erstes vorgebbares Zeitintervall bleibt. Das erste Zeitintervall kann beispielsweise bis zu 2 Sekunden, vorzugsweise ungefähr 0,5 Sekunden, betragen. Wenn also der Handbedienungshebel in seine Neutralstellung zurückkehrt, schaltet die Aktivierung nach kurzer Zeit ab. Es ist dann für die Abgabe von Steuersignalen eine erneute Aktivierung, wie oben beschrieben, erforderlich. Bei einem kurzen Durchfahren der Neutralstellung wird die Aktivierung jedoch selbst dann nicht aufgehoben, wenn das Aktivierungselement dabei nicht betätigt wird.According to a preferred embodiment of the invention, an electrical control device is provided which receives and evaluates the signals of at least one actuating transducer, which responds to pivoting of the hand control lever, as well as the signals of the at least one switching element associated with the locking element. The control unit accepts an activation of the at least one actuation converter, that is to say a forwarding of signals the actuator to the associated work function, only if the activation element is triggered (actuated), while the manual control lever is in its neutral position. However, if the manual control lever is initially in a position other than its neutral position, the actuating converter is not activated when the activation element is actuated. The activation is thus possible only from the neutral position of the hand lever. This has the safety-relevant advantage that a movement of the work function (eg front loader) can only be caused when the manual control lever is moved, but not when, for example, the ignition of the vehicle is switched on when the hand control lever is deflected.
When the activated hand lever is pivoted from its neutral position, the activation is maintained even when the activation element returns to its rest position. A preferred embodiment of the invention provides, however, that the control unit cancels the activation when the activation element is in its rest position (because it was released) and the hand control lever returns to its neutral position and there remains longer than a first predetermined time interval. The first time interval can be, for example, up to 2 seconds, preferably about 0.5 seconds. Thus, when the manual control lever returns to its neutral position, the activation switches off after a short time. It is then for the delivery of control signals, a re-activation, as described above, required. However, a brief passage through the neutral position does not cancel the activation even if the activation element is not actuated.

Um einen Mißbrauch und eine Umgehung der Verrieglungsphilosophie auszuschließen, bei der die Bedienungsperson das Aktivierungselement durch Hilfsmittel (Klebeband) in seiner betätigten Stellung festsetzt, um den Handbedienungshebel dauerhaft aktiv zu halten, sieht eine bevorzugte Ausgestaltung der Erfindung vor, daß das Steuergerät die Aktivierung aufhebt, wenn bei betätigtem Aktivierungselement der Handbedienungshebel in Neutralstellung zurückkehrt und hier länger als ein zweites vorgebbares Zeitintervall verharrt. Das zweite Zeitintervall beträgt vorzugsweise bis zu 3 Minuten, vorzugsweise ungefähr 1 Minute. Wird jedoch die Neutralstellung nur kurzzeitig durchfahren, bleibt die Aktivierung bestehen.In order to avoid misuse and circumvention of the locking philosophy in which the operator sets the activation element by means of adhesive tape in its actuated position to keep the handset lever permanently active, a preferred embodiment is provided The invention provides that the control unit cancels the activation when the manual control lever returns to the neutral position when the activation element is actuated and remains here longer than a second predeterminable time interval. The second time interval is preferably up to 3 minutes, preferably about 1 minute. However, if the neutral position is traversed only briefly, the activation remains.

Anhand der Zeichnung, die ein Ausführungsbeispiel der Erfindung zeigt, werden nachfolgend die Erfindung sowie weitere Vorteile und vorteilhafte Weiterbildungen und Ausgestaltungen der Erfindung näher beschrieben und erläutert.Reference to the drawing, which shows an embodiment of the invention, the invention and further advantages and advantageous developments and refinements of the invention are described and explained in more detail below.

Es zeigt:

Fig. 1
einen erfindungsgemäßen Handbedienungshebel,
Fig. 2
ein elektrisches Blockdiagramm mit einem erfindungsgemäßen Handbedienungshebel, einem Steuergerät und drei Arbeitsfunktionen und
Fig. 3
ein Flußdiagramm, anhand dessen eine bevorzugte Funktionsweise des erfindungsgemäßen Handbedienungshebels beschrieben wird.
It shows:
Fig. 1
a hand control lever according to the invention,
Fig. 2
an electrical block diagram with a hand control lever according to the invention, a control unit and three working functions and
Fig. 3
a flow chart, based on which a preferred operation of the hand control lever according to the invention will be described.

Bei dem in Fig. 1 dargestellten Handbedienungshebel 10 handelt es sich um einen durch Federkraft mittenzentrierten joystickartig ausgebildeten Hebel, der sich mittels eines nicht näher dargestellten Kreuzgelenks 12 in zwei Richtungen, nach vorn und hinten (x) bzw. nach links und rechts (y), verschwenken läßt. Der Handbedienungshebel 10 besteht im wesentlichen aus einem Betätigungsgriff 14, einer mittleren Konsole 16 und einem sich nach unten an die Konsole 16 anschließenden Hebelschaft 18, an dessen unteren Ende sich das Kreuzgelenk 12 befindet. Im Bereich des Hebelschaftes 18 sind nicht dargestellte Betätigungswandler (Potentiometer) angebracht, die die jeweilige Lage des Hebels 10 in seinen zwei Richtungen abtasten und in elektrische Proportionalsignale (x, y) umwandeln.In the illustrated in Fig. 1 hand lever 10 is a center-centered by spring force joystick-like lever, which by means of a universal joint 12, not shown in two directions, fore and aft (x) and to the left and right (y) , can pivot. The manual control lever 10 consists essentially of an operating handle 14, a central console 16 and a subsequent down to the console 16 lever shaft 18, at the lower end of the universal joint 12 is located. In the region of the lever shaft 18, not shown actuating transducer (potentiometer) are mounted, which scan the respective position of the lever 10 in its two directions and convert them into electrical proportional signals (x, y).

Auf der nach oben weisenden Stirnfläche des Betätigungsgriffs 14 befinden sich zwei von Hand betätigbare Betätigungselemente 20, 22, die mit zugehörigen, nicht näher dargestellten elektrischen Betätigungswandlern zwei Druckschalter bilden. Mit den Betätigungselementen 20, 22 kann die Bedienungsperson Steuersignale (z1, z2) auslösen, um beispielsweise zwischen unterschiedlichen Zusatzfunktionen umzuschalten.On the upward-facing end face of the actuating handle 14 are two manually operable actuators 20, 22, which form with associated, not shown electrical actuation converters two pressure switch. With the actuators 20, 22, the operator control signals (z 1 , z 2 ) trigger, for example, to switch between different additional functions.

Auf der dem Fahrer abgewandten Seite des Betätigungsgriffs 14 ist ein von Hand betätigbares Wippelement 24 mit einem oberen Wippschenkel 26 und einem unteren Wippschenkel 28 angeordnet. Dem Wippelement 24 ist ein nicht dargestellter, als Potentiometer ausgebildeter Betätigungswandler zugeordnet, der an Zusatzgeräte Steuersignale abgibt, die zur Wippstellung proportional sind.On the side facing away from the driver of the actuating handle 14, a manually operable rocker 24 is arranged with an upper rocker arm 26 and a lower rocker arm 28. The rocker 24 is associated with a not shown, designed as a potentiometer actuator actuator that outputs control signals to auxiliary devices that are proportional to the rocker position.

Im Bereich des schaftseitigen Endes des Betätigungsgriffs 14 ist an der Konsole 16 über eine quer zur Hebellängsachse 30 verlaufende Schwenkachse 32 ein klappenförmig ausgebildetes Aktivierungselement 34 (Sicherheitsklappe) schwenkbar angelenkt, welches durch eine nicht dargestellte Feder mit geringer Federkraft in seine in Fig. 1 dargestellte Ruhelage gedrängt wird. Das Aktivierungselement 34 weist einen im wesentlichen L-förmigen Querschnitt mit zwei Schenkeln 36, 38 auf. Das freie Ende des ersten Schenkels 36 bildet mit der Schwenkachse 32 die Anlenkstelle des Aktivierungselements 34. Der zweite Schenkel 38 läuft in einem spitzen Winkel auf die Hebellängsachse 30 zu und endet in der Nähe des oberen freien Endes des Betätigungsgriffs 14. Das freie abgerundete Ende des zweiten Schenkels 38 ragt nicht über die Stirnseite des Betätigungsgriffs 14 hinaus und bietet damit keine Angriffsmöglichkeit für ein versehentliches Auslenken.In the region of the shank-side end of the actuating handle 14, a flap-shaped activation element 34 (safety flap) is pivotably articulated to the console 16 via a pivot axis 32 extending transversely to the lever longitudinal axis 30, which by means of a spring, not shown, with low spring force in its rest position shown in FIG is urged. The activation element 34 has a substantially L-shaped cross section with two legs 36, 38. The free end of the first leg 36 forms with the pivot axis 32, the pivot point of the activation element 34. The second leg 38 runs at an acute angle to the lever longitudinal axis 30 and terminates near the upper free end of the actuating handle 14. The free rounded end of the second leg 38 does not protrude beyond the front side of the operating handle 14 and thus offers no possibility of attack for accidental deflection.

An den ersten Schenkel 36 des Aktivierungselements 34 ist ein sich nach unten erstreckender Vorsprung 40 angeformt. Dieser wirkt mit dem Betätigungsbolzen 42 eines als Mikroschalter ausgebildeten Schaltelements 44 zusammen, der durch die Kraft einer Feder in Richtung Vorsprung 40 gedrängt wird. In der dargestellten Ruhestellung greift der Vorsprung 40 nicht an dem Betätigungsbolzen 42 an, so daß letzterer kein Schaltsignal (s) des Schaltelements 44 auslöst.To the first leg 36 of the activation element 34 is a downwardly extending projection 40 is formed. This acts with the actuating pin 42 of a micro switch designed as a switching element 44 which is urged by the force of a spring in the direction of projection 40. In the illustrated rest position, the projection 40 does not engage the actuating pin 42, so that the latter does not trigger a switching signal (s) of the switching element 44.

Zum Ergreifen des Betätigungsgriffs 14 schiebt die Bedienungsperson ihre Finger zwischen das Aktivierungselement 34 und den Betätigungsgriff 14 und drückt das Aktivierungselement 34 aus seiner dargestellten Ruhestellung nach links (bezüglich der Fig. 1). Dabei entfernt sich das freie Ende des zweiten Schenkels 38 von dem Betätigungsgriff 14. Gleichzeitig drückt der Vorsprung 40 gegen den Betätigungsbolzen 42 und löst im Schaltelement 44 eine Schaltfunktion aus. Nimmt die Bedienungsperson ihre Hand von dem Betätigungsgriff 14 weg, so schwenkt das Aktivierungselement 34 infolge Federkraft zurück in seine Grundstellung. Dabei wird das Schaltelement 44 zurückgeschaltet und gibt kein Schaltsignal ab.To grasp the operating handle 14, the operator pushes his fingers between the activation element 34 and the operating handle 14 and pushes the activation element 34 from its illustrated rest position to the left (with respect to FIG. 1). At the same time, the projection 40 presses against the actuating pin 42 and triggers a switching function in the switching element 44. If the operator takes her hand away from the operating handle 14, the activating element 34 pivots back into its basic position as a result of spring force. In this case, the switching element 44 is switched back and outputs no switching signal.

Auf der Konsole 16 ist ferner ein in Fig. 2 angedeuteter Kippschalter 45 angeordnet, der sich zwischen EIN und AUS verkippen läßt. Durch den Kippschalter 45 läßt sich der Handbedienungshebel 10 in seinen betriebsbereiten Zustand schalten.On the console 16, a tilt switch 45 indicated in Fig. 2 is further arranged, which can be tilted between ON and OFF. By the toggle switch 45, the manual control lever 10 can be switched to its ready state.

In Fig. 2 ist der Handbedienungshebel 10 mit seinen Betätigungswandlern (Potentiometer des Hebelschafts 18, Druckschalter 20, 22, Potentiometer des Wippelements 24, Schaltelement 44) als Block angedeutet. Die Signale der Betätigungswandler werden von einem Steuergerät 46 ausgewertet, welches entsprechend eines Auswertungsalgorithmus Steuersignale an Aktuatoren 48, 50, 52 abgibt. Die Aktuatoren 48, 50, 52 steuern zugehörige hydraulische Ventile 54, 56, 58 von Arbeitsfunktionen. Bei den Ventilen 54, 56, 58 handelt es sich beispielsweise um elektro-hydraulische Steuerventile eines Frontladers. Beispielsweise beeinflußt das Ventil 54 das Heben und Senken eines nicht dargestellten Laderbaums, das Ventil 56 das Verkippen eines am freien Ende des Laderbaums angelenkten Greifers und das Ventil 58 das Öffnen und Schließen des Greifers. Die Steuerung eines hydraulischen Zusatzgerätes durch das Wippelement 24 wurde in Fig. 2 nicht näher dargestellt. Die Druckschalter 20 und 22 können der Umschaltung zwischen verschiedenen Zusatzfunktionen dienen.In Fig. 2, the manual control lever 10 with its actuators (potentiometer of the lever shaft 18, pressure switch 20, 22, potentiometer of the rocker element 24, switching element 44) is indicated as a block. The signals of the actuation transducers are evaluated by a control unit 46, which outputs control signals to actuators 48, 50, 52 in accordance with an evaluation algorithm. The actuators 48, 50, 52 control associated hydraulic valves 54, 56, 58 of work functions. The valves 54, 56, 58 are, for example, electro-hydraulic control valves of a Front loader. For example, the valve 54 affects the raising and lowering of a loader boom, not shown, the valve 56, the tilting of a gripper articulated at the free end of the loader boom and the valve 58, the opening and closing of the gripper. The control of a hydraulic auxiliary device by the rocker 24 was not shown in Fig. 2 in detail. The pressure switches 20 and 22 can serve the switching between various additional functions.

Die Auswertung der Signale erfolgt in dem Steuergerät 46 unter Anwendung eines Algorithmus. Ein zur Durchführung der vorliegenden Erfindung geeigneter Algorithmus wird im Folgenden anhand des in Fig. 3 dargestellten Flußdiagramms erläutert.The evaluation of the signals takes place in the control unit 46 using an algorithm. An algorithm suitable for carrying out the present invention is explained below with reference to the flowchart shown in FIG.

Der Algorithmus beginnt beim Einschalten des Kippschalters 45 mit dem Schritt 100. In Schritt 102 ist der Handbedienungshebel 10 noch nicht aktiviert, das heißt das Steuergerät 46 setzt die Signale der Betätigungswandler 20, 22, 24, 44 nicht in Steuersignale für die Arbeitsfunktionen um. In Schritt 104 erfolgt die Abfrage, ob der Handbedienungshebel seine Neutralstellung einnimmt und ob sich das Aktivierungselement 34 in seiner Ruhestellung befindet. Solange diese beiden Bedingungen nicht erfüllt sind, wiederholt der Algorithmus in regelmäßigen Zeitabständen die Abfrage des Schritts 104.The algorithm begins when switching the toggle switch 45 to step 100. In step 102, the manual control lever 10 is not yet activated, that is, the controller 46 does not convert the signals of the actuation transducers 20, 22, 24, 44 into control signals for the working functions. In step 104, the query is whether the hand control lever assumes its neutral position and whether the activation element 34 is in its rest position. As long as these two conditions are not met, the algorithm repeats the query of step 104 at regular intervals.

Sind die beiden Bedingungen des Schritts 104 erfüllt, schreitet der Algorithmus zu Schritt 106 weiter, wo abgefragt wird, ob das Aktivierungselement 34 inzwischen betätigt wurde und seine Ruhestellung verlassen hat. Solange dies nicht der Fall ist, wiederholt Schritt 106 in regelmäßigen Zeitabständen seine Abfrage. Wird durch Schritt 106 eine Betätigung des Aktivierungselements 34 festgestellt, so schreitet der Algorithmus zu Schritt 108 weiter, durch den der Handbedienungshebel 10 aktiviert wird. Der Handbedienungshebel 10 befindet sich nun in seinem Arbeitszustand, in dem in Abhängigkeit seines Verschwenkens Steuersignale an zugehörige Arbeitsfunktionen abgegeben werden.If the two conditions of step 104 are satisfied, the algorithm proceeds to step 106, where it is queried whether the activation element 34 has been actuated in the meantime and has left its rest position. As long as this is not the case, step 106 repeats its query at regular intervals. If an activation of the activation element 34 is detected by step 106, the algorithm proceeds to step 108, through which the manual control lever 10 is activated. The hand control lever 10 is now in its working state in which, depending on its pivoting control signals are issued to associated work functions.

In Schritt 110 erfolgt die Abfrage, ob sich der Handbedienungshebel 10 in seiner Neutralstellung befindet. Ist dies nicht der Fall, so wird die Aktivierung des Handbedienungshebels 10 aufrechterhalten und in regelmäßigen Zeitabständen die Abfrage des Schritts 110 wiederholt. Hierbei bleibt der Handbetätigungshebel auch dann in seinem Arbeitszustand, wenn das Aktivierungselement losgelassen wird und in seine Ruhestellung zurückkehrt.In step 110, the query is whether the hand lever 10 is in its neutral position. If this is not the case, then the activation of the manual control lever 10 is maintained and the query of step 110 is repeated at regular time intervals. Here, the manual operating lever remains in its working state even when the activation element is released and returns to its rest position.

Wird in Schritt 110 jedoch festgestellt, daß sich der Handbedienungshebel 10 in seiner Neutralstellung befindet, so schreitet der Algorithmus zu Schritt 112 weiter, in dem abgefragt wird, ab das Aktivierungselement 34 noch betätigt ist.
Ist die Antwort des Schritts 112 positiv, so schreitet der Algorithmus zu Schritt 114 weiter, wo geprüft wird, ob das Aktivierungselement 34 während der letzten vollen Minute ununterbrochen betätigt war. Trifft dies zu, so wird in Schritt 116 der Handbedienungshebel 10 deaktiviert und der Algorithmus zum Schritt 104 zurückgeführt. Dies hat zur Folge, daß bei einem Handbedienungshebel 10 in Neutralstellung dieser nur dann aktiviert bleibt, wenn das Aktivierungelement 34 nicht länger als eine Minute betätigt wurde. Andernfalls wird die Aktivierung aufgehoben. Hierdurch wird verhindert, daß das Aktivierungselement 34 auf unzulässige Weise blockiert wird, ohne daß die Bedienungsperson den Handbedienungshebel 10 ergreift und gleichzeitig mit ihrer Hand das Aktivierungselement 34 betätigt.However, if it is determined in step 110 that the handset lever 10 is in its neutral position, the algorithm proceeds to step 112 where it is queried that the activation element 34 is still actuated.
If the answer of step 112 is affirmative, the algorithm proceeds to step 114, where it is checked whether the activation element 34 has been continuously pressed during the last full minute. If so, in step 116 the handset lever 10 is deactivated and the algorithm is returned to step 104. This has the consequence that in a manual control lever 10 in the neutral position, this only remains activated if the activation element 34 has not been operated for more than one minute. Otherwise, the activation is canceled. This prevents the activation element 34 is blocked in an inadmissible manner without the operator takes the handset lever 10 and simultaneously actuates the activation element 34 with her hand.

Ist die Antwort in Schritt 114 negativ, d. h. das Aktivierungselement wurde in der letzten Minute nicht ununterbrochen betätigt, während sich der Bedienungshebel 10 in seiner Neutralstellung befand, dann kehrt der Algorithmus zu Schritt 110 zurück und der Handbedienungshebel 10 bleibt aktiviert.If the answer in step 114 is negative, d. H. the activation element was not actuated continuously during the last minute while the operating lever 10 was in its neutral position, then the algorithm returns to step 110 and the manual control lever 10 remains activated.

Wird in Schritt 112 festgestellt, daß das Aktivierungselement 34 nicht mehr betätigt ist, so schreitet der Algorithmus zu Schritt 118 weiter, wo abgefragt wird, ob während der letzten halben Sekunde das Aktivierungselement nicht betätigt wurde. Trifft dies zu, so wird in Schritt 116 der Handbedienungshebel 10 deaktiviert und der Algorithmus zu Schritt 104 zurückgeführt. Andernfalls kehrt der Algorithmus zu Schritt 110 zurück. Dies hat zur Folge, daß bei unbetätigtem Aktivierungselement 34 der Handbedienungshebel 10 nur kurzzeitig durch seine Neutralstellung bewegt werden kann, ohne daß er automatisch deaktiviert wird. Bleibt er jedoch bei unbetätigtem Aktivierungselement 34 längere Zeit (länger als 0,5 Sekunden) in seiner Neutralstellung, so wird er deaktiviert. In diesem Fall muß erneut die Abfrageschleife beginnend bei Schritt 104 durchlaufen werden.If it is determined in step 112 that the activation element 34 is no longer actuated, the algorithm proceeds Step 118, where it is queried whether the activation element has not been actuated during the last half second. If so, in step 116 the handset lever 10 is deactivated and the algorithm is returned to step 104. Otherwise, the algorithm returns to step 110. This has the consequence that with unconfirmed activation element 34 of the manual control lever 10 can only be moved through its neutral position for a short time, without being automatically deactivated. If, however, it remains in its neutral position with unactivated activation element 34 for a longer time (longer than 0.5 seconds), it is deactivated. In this case, the polling loop must be run again beginning at step 104.

Auch wenn die Erfindung lediglich anhand eines Ausführungsbeispiels beschrieben wurde, erschließen sich für den Fachmann im Lichte der vorstehenden Beschreibung sowie der Zeichnung viele verschiedenartige Alternativen, Modifikationen und Varianten, die unter die vorliegende Erfindung fallen. Beispielsweise können neben den beschriebenen Signalen auch Signale anderer Betätigungswandler, beispielsweise die Signale der Druckschalter 20, 22 und/oder des Wippschalters 24, in die Verriegelung einbezogen werden.Although the invention has been described by way of example only, in light of the foregoing description and the drawings, those skilled in the art will recognize many different alternatives, modifications and variations which are within the scope of the present invention. For example, in addition to the described signals, signals from other actuation transducers, for example the signals of the pressure switches 20, 22 and / or the rocker switch 24, can also be included in the interlocking.

Claims (14)

  1. A manual operating lever of an operator's platform of a vehicle, with at least one electrical actuation transducer for issuing control signals to at least one working function in dependence on pivoting the manual operating lever (10) and/or in dependence on the actuation of at least one actuating element (20, 22, 24) arranged on the manual operating lever (10), wherein at least one manually operable activating element (34) coupled to an electrical switch element (44) is provided in the region of the actuating handle (14) of the manual operating lever (10) and cooperates with an electrical interlock, in order to activate the at least one actuation transducer to issue control signals in dependence on actuations of the activating element (34), characterized in that the cross-section of the activating element (34) is substantially L-shaped, wherein the end of the first arm (36) is pivoted on the manual operating lever (10) and the second arm (38) terminates with the activating element (34) not activated in the vicinity of the free end of the actuating handle (14), so that, in order to grasp the actuating handle (14) the hand is pushed between the actuating handle (14) and the activating element (34), whereby the second arm (38) is pushed away from the actuating handle (14).
  2. A manual operating lever according to claim 1, characterized in that the manual operating lever (10) is in the form of a joystick and can be pivoted in two directions about a universal joint (12), and in that at least one actuation transducer is provided for each pivotal direction for affecting at least one associated working function.
  3. A manual operating lever according to claim 1 or 2, characterized in that at least one pressure switch (20, 22) with an actuation transducer in the form of a switch element is provided in the region of the actuating handle (14).
  4. A manual operating lever according to any of claims 1 to 3, characterized in that at least one rocker element (24) is provided in the region of the actuating handle (14) and is coupled to at least one actuation transducer in the form of a potentiometer for generating control signals corresponding to the rocker position.
  5. A manual operating lever according to any of claims 1 to 4, characterized in that the activating element (34) is pivoted movably on the manual operating lever (10) about a pivotal axis (32).
  6. A manual operating lever according to any of claims 1 to 5, characterized in that the activating element (34) is of flap form and is hinged on the manual operating lever (10) in the region of the shank end of the actuating handle (14) by a pivotal axis (32) running transverse to the lever longitudinal axis (30).
  7. A manual operating lever according to any of claims 1 to 6, characterized in that the activating element (34) has a projection (40) in the vicinity of its pivot point (32) which cooperates with an actuating pin (42) of the switch element (44).
  8. A manual operating lever according to any of claims 1 to 7, characterized in that an electrical control apparatus is provided and evaluates the signals of the at least one actuation transducer and of the at least one switch element (44) and issues control signals to the working functions (54, 56, 58) in dependence on the evaluated signals.
  9. A manual operating lever according to any of claims 1 to 8, characterized in that an electrical control apparatus (46) is provided and receives and evaluates at least the signals of an actuation transducer which responds to pivoting of the manual operating lever (10) as well as the signals of the at least one switch element (44), and in that the control apparatus (46) only effects activation of the at least one actuation transducer when the manual operating lever (10) is located in neutral position and the activating element (34) is actuated (steps 104 and 106).
  10. A manual operating lever according to any of claims 1 to 9, characterized in that the control apparatus (46) terminates an activation when the manual operating lever (10) is in neutral position and the activating element (34) is in its un-activated rest position for a predetermined interval of time (110, 112, 118).
  11. A manual operating lever according to claim 10, characterized in that the duration of the first interval of time amounts to up to 2 seconds, preferably around 0.5 seconds.
  12. A manual operating lever according to any of claims 1 to 11, characterized in that the control apparatus (46) terminates an activation when the activating element (34) of the manual operating lever (10) is in neutral position for longer than a second predetermined interval of time (steps 110, 112, 116).
  13. A manual operating lever according to claim 12, characterized in that the duration of the second interval of time amounts to up to 3 minutes, preferably around 1 minute.
  14. Use of a manual operating lever (10) according to any of claims 1 to 13 for actuating a loader, especially the loader of an agricultural or industrial utility vehicle.
EP99115474A 1998-08-17 1999-08-05 Manual control device Expired - Lifetime EP0981078B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19837163 1998-08-17
DE19837163A DE19837163C1 (en) 1998-08-17 1998-08-17 Hand control lever

Publications (3)

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EP0981078A2 EP0981078A2 (en) 2000-02-23
EP0981078A3 EP0981078A3 (en) 2003-11-19
EP0981078B1 true EP0981078B1 (en) 2006-08-30

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EP99115474A Expired - Lifetime EP0981078B1 (en) 1998-08-17 1999-08-05 Manual control device

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US (1) US6178841B1 (en)
EP (1) EP0981078B1 (en)
AR (1) AR020187A1 (en)
AT (1) ATE338299T1 (en)
BR (1) BR9903722A (en)
CA (1) CA2280345C (en)
DE (2) DE19837163C1 (en)
TR (1) TR199901964A2 (en)

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Also Published As

Publication number Publication date
AR020187A1 (en) 2002-05-02
EP0981078A2 (en) 2000-02-23
DE19837163C1 (en) 2000-03-16
ATE338299T1 (en) 2006-09-15
EP0981078A3 (en) 2003-11-19
CA2280345C (en) 2002-07-02
CA2280345A1 (en) 2000-02-17
DE59913816D1 (en) 2006-10-12
TR199901964A2 (en) 2000-04-21
BR9903722A (en) 2000-09-26
US6178841B1 (en) 2001-01-30

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