EP0509427A1 - Power control device, particularly for internal combustion engines for driving lawn mowers - Google Patents

Power control device, particularly for internal combustion engines for driving lawn mowers Download PDF

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Publication number
EP0509427A1
EP0509427A1 EP92106342A EP92106342A EP0509427A1 EP 0509427 A1 EP0509427 A1 EP 0509427A1 EP 92106342 A EP92106342 A EP 92106342A EP 92106342 A EP92106342 A EP 92106342A EP 0509427 A1 EP0509427 A1 EP 0509427A1
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EP
European Patent Office
Prior art keywords
control device
lever
power control
locking
stop
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Granted
Application number
EP92106342A
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German (de)
French (fr)
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EP0509427B1 (en
Inventor
Peter Held
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Wolf-Gerate Vertriebsgesellschaft KG GmbH
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Wolf-Gerate Vertriebsgesellschaft KG GmbH
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    • 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
    • G05G5/04—Stops for limiting movement of members, e.g. adjustable stop

Definitions

  • the invention relates to a power control device, in particular for internal combustion engines intended for driving lawnmowers and other garden tools, with a mechanical actuator which can be operated by hand or foot and which can be applied against positive stops for idling and full load.
  • Lawn mower motors and motors which are provided for similar purposes, are designed with regard to their power and speed so that they can also cope with critical lawn conditions, such as wet or tall grass.
  • this high power reserve also causes the user to mow normal dry lawn with the maximum speed and maximum power, which is an unnecessary noise pollution because the noise emission increases with increasing power.
  • the unnecessary full-load operation also means that a lot more fuel is required than is necessary and there is an unnecessarily high exhaust gas emission.
  • the invention is therefore based on the object of providing a power control device, in particular for lawn mower engines, which enables the user to optimally adjust the lawn mower in a simple manner depending on the state of the lawn to be mowed.
  • an actuating lever 1 consisting of two half-shells 4, 5 and provided with a handle 11 can be pivoted about an axis E.
  • the core 81 of a Bowden cable 8 is attached to it in a bore 9, which attaches to the control housing 2 and leads to the internal combustion engine, for example to the throttle valve of this internal combustion engine.
  • the locking lever 3 is fixed laterally with its lower end, but pivotable about the axis E.
  • the locking lever 3 carries a bolt 32 which projects through an opening of the half-shell 5 and which has a locking lug 33 in the middle.
  • the actuating housing half 6 is provided on the inside with two stops 61 and 62 which have a steep latching flank interacting with the bolt 32 and a ramp-like ramping flank.
  • the stop 61 determines the full load position and the stop 62 the normal load position.
  • the adjusting lever strikes the adjusting housing, namely in position A in the idle position and in position D in the cold start position.
  • a detent 10 in the form of an elastically retracting projection which cooperates with the detent lever 3 in the full load position (position C) and forms a stop which also becomes effective when the detent lever 3 is actuated by the release button 31 pressed in and therefore the bolt 32 is drawn into the adjusting lever.
  • This detent moves back elastically if the actuating lever is pivoted further in the direction of position D while the detent lever is pressed.
  • the inside of the actuating housing half 6 carries a latching area 63, the latches of which interact with the latching lug 33 of the latch 32. This enables a sensitive detent adjustment.
  • the adjusting housing 2 is fastened to the handle bar 12 of a lawnmower.
  • the control housing could also be combined with a crossbar arranged on the guide bar.
  • the device works as follows: Before or after switching off the engine, the control lever 1 preferably transferred to the idle position (position A). To start the cold engine, the control lever is moved from the idle position (position A) to the cold start position (position D). For this purpose, the release button 31 is pressed so that the latch 32 is withdrawn. The actuating lever can then be moved past the stops 62 and 61. When the full load position (position C) is passed quickly, the detent lock 10 is also overcome.
  • control lever can be returned to the idle position (position A) without pressing the release button.
  • the adjusting lever can then be moved back to the normal position (position B) without pressing a button, with each position being able to be maintained in the locking field 63 via the locking lug 33.
  • the stop 62 can be overcome by pressing the release button 31, and the actuating lever can be transferred to the full load position (position C). Even if the release button 31 is kept pressed, the resistance to overrunning the full load position by a stop on the detent 10 is opposed. If the release button 31 is released, the bolt 32 is brought in front of the stop 61.
  • FIGS. 9 to 11 A further exemplary embodiment of the invention is shown in FIGS. 9 to 11.
  • a pivot pin 22 is arranged on a circuit board 21 within a housing (not shown) about which an adjusting lever 23 equipped with a handle 11 can be pivoted.
  • a latching link 25 is slidably mounted on the adjusting lever in the longitudinal direction thereof.
  • This latching link has a longitudinal slot 26, with which it runs on a guide disk 27 placed on the pivot pin 22, the upper flange of which lies on the latching link adjacent to the longitudinal slot.
  • the guide disc is held by a nut screwed onto the pivot pin 22.
  • the latching backdrop interacts with a latching segment 28 which is screwed onto the circuit board 21.
  • the locking segment points between the idle position (item A) and the normal load position (item B) locking teeth 29, which interact with a locking lug 30 of the locking link.
  • the detent segment also carries a positive lock stop 41 for normal load and a positive lock stop 42 for full load. This form-fitting stops 41, 42 cooperate with a stop bolt 43 of the locking link 25.
  • the locking link 25 is biased by a spring 44 on the locking segment 28. The spring is anchored on the one hand on a bent tab 45 of the locking link and on the other hand on a bent tab 46 of the actuating lever 23.
  • a pull rod 47 engages, which is anchored to a release button 48, which is displaceable on the part of the adjusting lever 1 bent upwards.
  • the adjusting device shown in FIGS. 9 to 11 works as follows: In the position between idling and normal load (between position A and position B), the adjusting lever can be moved with the handle 11, the latching lug 30 of the latching link 25 cooperating with the latching teeth 29 of the latching segment 28. In the normal load position, the bolt 43 strikes against the stop 41. This stop can be overcome by pulling the release button 48, whereby the locking link is pulled back against spring force. When the adjusting lever is pivoted further, the stop bolt 43 hits the stop 42 for full load (position C). This stop can in turn be overcome by pulling the release button 48. Then the adjusting lever can be pivoted further into position D, in which a housing stop is provided. This is the position for cold start.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Harvester Elements (AREA)

Abstract

Provided especially for lawnmower engines is a power control device which consists of an actuating housing (2) fixable to the handle spar (12) and of an actuating lever (1) which is pivotable in said actuating housing and which is connected to the internal-combustion engine by means of a Bowden pullcord (8). In addition to the stop position for full load and for idling, there is also a specific stop position for normal load, and between the normal load and idling range there is an index zone (63) for the requisite fine adjustment. The actuating lever (1), after overcoming an elastically retracting detent (10), can be transferred beyond the full-load position into the cold-start position. The pivotably mounted actuating lever (1) is provided with a catch slot (25) which cooperates with the positive-locking stops (61,62) of a catch element, and the catch slot (25) can be lifted out by means of a release knob (48). <IMAGE>

Description

Die Erfindung bezieht sich auf eine Leistungssteuervorrichtung, insbesondere für zum Antrieb von Rasenmähern und anderen Gartengeräten vorgesehene Brennkraftmaschinen, mit einem durch Hand oder Fuß bedienbaren mechanischen Stellglied, welches gegen formschlüssige Anschläge für Leerlauf und Vollast anlegbar ist.The invention relates to a power control device, in particular for internal combustion engines intended for driving lawnmowers and other garden tools, with a mechanical actuator which can be operated by hand or foot and which can be applied against positive stops for idling and full load.

Rasenmähermotore und Motore, die für ähnliche Zwecke vorgesehen sind, werden hinsichtlich ihrer Leistung und Drehzahl so ausgelegt, daß sie auch kritische Rasenzustände, wie nasses oder hohes Gras sicher bewältigen können. Diese hohe Leistungsreserve veranlaßt den Benutzer in vielen Fällen auch normalen trockenen Rasen mit der maximalen Drehzahl und maximalen Leistung zu mähen, was eine unnötige Lärmbelästigung darstellt, weil die Schallemission sich mit vergrößernder Leistung erhöht. Auch wird durch den unnötigen Vollastbetrieb sehr viel mehr Brennstoff gebraucht als nötig und es ergibt sich eine unnötig hohe Abgasemission.Lawn mower motors and motors, which are provided for similar purposes, are designed with regard to their power and speed so that they can also cope with critical lawn conditions, such as wet or tall grass. In many cases, this high power reserve also causes the user to mow normal dry lawn with the maximum speed and maximum power, which is an unnecessary noise pollution because the noise emission increases with increasing power. The unnecessary full-load operation also means that a lot more fuel is required than is necessary and there is an unnecessarily high exhaust gas emission.

Zwar können bei allen heute in Betrieb befindlichen Rasenmähern die Betriebsstellungen Kaltstart, Motorstop, Leerlauf bis Volllast eingestellt werden, wobei zwischen Leerlauf und Vollast eine stufenlose oder eine feingerasterte Verstellung möglich ist, jedoch hat es sich gezeigt, daß der Benutzer den Mähvorgang unnötigerweise immer mit Vollast durchführt, weil es für den Benutzer schwierig ist, die reduzierte Motorleistung und Motordrehzahl, die für normalen trockenen Rasen ausreichend ist, zu ermitteln und einzustellen. Um zu vermeiden, daß der Motor stehen bleibt, wird vorsorglich immer mehr Gas gegeben als unbedingt erforderlich. Auch ist es für den Benutzer schwierig, eine einmal gefundene Normaleinstellung nach jedem erneuten Start zu reproduzieren.Although the operating positions cold start, engine stop, idle to full load can be set for all lawnmowers in operation today, a stepless or a finely adjusted adjustment is possible between idle and full load, but it has been shown that the user unnecessarily always mows with full load performs because it is difficult for the user to determine and adjust the reduced engine power and engine speed sufficient for normal dry lawns. In order to avoid that the engine stops, always more gas is given as a precaution than absolutely necessary. It is also difficult for the user to reproduce a normal setting once found after each restart.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Leistungssteuervorrichtung, insbesondere für Rasenmähermotore zu schaffen, die es dem Benutzer ermöglicht, den Rasenmäher je nach dem Zustand des zu mähenden Rasens jeweils optimal auf einfache Weise einzustellen.The invention is therefore based on the object of providing a power control device, in particular for lawn mower engines, which enables the user to optimally adjust the lawn mower in a simple manner depending on the state of the lawn to be mowed.

Gelöst wird die gestellte Aufgabe durch die im Kennzeichnungsteil des Anspruchs 1 angegebenen Merkmale.The problem is solved by the features specified in the characterizing part of claim 1.

Durch die zwischen Leerlauf und Vollast vorgesehene definierte Normallaststellung, die durch Anschlag festlegbar ist, kann Normalrasen auf ökonomische Weise mit geringstmöglicher Lärm- und Abgasbelastung gemäht werden. Reicht diese Leistung nicht mehr aus, so kann nach Betätigung des Auslösers ein Anschlag aufgehoben werden und der Stellhebel kann in die Vollastposition bewegt werden.Due to the defined normal load position between idling and full load, which can be determined by a stop, normal lawns can be mowed economically with the lowest possible noise and exhaust pollution. If this power is no longer sufficient, a stop can be released after actuation of the trigger and the adjusting lever can be moved to the full load position.

Zur Einstellung der Position Kaltstart wird bei eingedrücktem Auslöser eine zusätzliche formschlüssige Rastsperre mit fühlbarem Kraftaufwand überwunden.To set the cold start position, an additional positive locking lock with noticeable force is overcome when the trigger is pressed.

Weitere Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen.Further refinements of the invention result from the subclaims.

Nachstehend werden Ausführungsbeispiele der Erfindung anhand der Zeichnungen beschrieben. In der Zeichnung zeigen:

  • Fig. 1 eine Seitenansicht und eine Schnittansicht einer mit einem schwenkbaren Stellhebel ausgerüsteten Leistungssteuervorrichtung;
  • Fig. 2 eine Seitenansicht der Leistungssteuervorrichtung mit in Leerlaufstellung befindlichem Stellhebel;
  • Fig. 3 eine Seitenansicht der Leistungssteuervorrichtung mit in Normallaststellung befindlichem Stellhebel;
  • Fig. 4 eine Seitenansicht der Leistungssteuervorrichtung mit in Vollaststellung befindlichem Stellhebel;
  • Fig. 5 eine Seitenansicht der Leistungssteuervorrichtung mit in Kaltstartstellung befindlichem Stellhebel;
  • Fig. 6 in einer Abwicklung im Schnitt den Bewegungspfad des Stellhebels mit auslösbarem Rasthebel;
  • Fig. 7 eine Innenansicht der einen Stellgehäusehälfte;
  • Fig. 8 eine Innenansicht der anderen Stellgehäusehälfte.
  • Fig. 9 eine Ansicht einer weiteren Ausführungsform einer erfindungsgemäß ausgebildeten Leistungssteuervorrichtung;
  • Fig. 10 einen Schnitt nach der Linie 10-10 gemäß Fig. 9;
  • Fig. 11 in größerem Maßstab das Rastsegment und die hiermit zusammenwirkende Rastkulisse.
Exemplary embodiments of the invention are described below with reference to the drawings. The drawing shows:
  • 1 shows a side view and a sectional view of a power control device equipped with a pivotable adjusting lever;
  • 2 is a side view of the power control device with the control lever in the neutral position;
  • 3 shows a side view of the power control device with the actuating lever located in the normal load position;
  • Fig. 4 is a side view of the power control device with the control lever in the full load position;
  • 5 is a side view of the power control device with the control lever in the cold start position;
  • 6 is a development in section of the movement path of the actuating lever with a releasable locking lever;
  • Fig. 7 is an inside view of one half of the actuator housing;
  • Fig. 8 is an inside view of the other half of the actuator housing.
  • 9 is a view of a further embodiment of a power control device designed according to the invention;
  • Fig. 10 is a section along the line 10-10 of FIG. 9;
  • Fig. 11 on a larger scale the locking segment and the locking backdrop cooperating with it.

In dem aus zwei Stellgehäusehälften 6 und 7 zusammengefügten Stellgehäuse 2 ist ein aus zwei Halbschalen 4, 5 bestehender, mit Handgriff 11 versehener Stellhebel 1 um eine Achse E schwenkbar. An ihm ist in einer Bohrung 9 die Seele 81 eines Bowdenzuges 8 befestigt, der am Stellgehäuse 2 ansetzt und nach der Brennkraftmaschine, z.B. zur Drosselklappe dieser Brennkraftmaschine führt. Innerhalb des hohl ausgebildeten Stellhebels 1 ist ein Rasthebel 3 angeordnet, der einen aus dem Handgriff 11 vorstehenden Auslöseknopf 31 aufweist. Der Rasthebel 3 ist mit seinem unteren Ende seitlich festgelegt, aber um die Achse E schwenkbar. Er besteht aus elastischem Kunststoffmaterial und ist innerhalb des Stellhebels um eine die Achse E senkrecht kreuzende Achse F federnd verschwenkbar, wenn der Knopf 31 eingedrückt wird. Durch Federwirkung bewegt sich nach Loslassen des Auslöseknopfes 31 der Rasthebel 3 wieder in die aus Fig. 1 ersichtliche Stellung.In the actuating housing 2, which is composed of two actuating housing halves 6 and 7, an actuating lever 1 consisting of two half-shells 4, 5 and provided with a handle 11 can be pivoted about an axis E. The core 81 of a Bowden cable 8 is attached to it in a bore 9, which attaches to the control housing 2 and leads to the internal combustion engine, for example to the throttle valve of this internal combustion engine. A locking lever 3, which has a release button 31 protruding from the handle 11, is arranged within the hollow lever 1. The locking lever 3 is fixed laterally with its lower end, but pivotable about the axis E. It consists of elastic plastic material and is resiliently pivotable within the adjusting lever about an axis F crossing the axis E perpendicularly when the button 31 is pressed in. By spring action, after releasing the release button 31, the locking lever 3 moves back into the position shown in FIG. 1.

Der Rasthebel 3 trägt einen durch eine Öffnung der Halbschale 5 hindurchstehenden Riegel 32, der in der Mitte eine Rastnase 33 trägt.The locking lever 3 carries a bolt 32 which projects through an opening of the half-shell 5 and which has a locking lug 33 in the middle.

Die Stellgehäusehälfte 6 ist innen mit zwei Anschlägen 61 und 62 versehen, die eine steile, mit dem Riegel 32 zusammenwirkende Rastflanke und eine rampenartige Auflaufflanke besitzen. Der Anschlag 61 bestimmt die Vollaststellung und der Anschlag 62 die Normallaststellung. In den beiden Endschwenkstellungen schlägt der Stellhebel am Stellgehäuse an, und zwar in der Position A in der Leerlaufstellung, und in der Position D in der Kaltstartstellung.The actuating housing half 6 is provided on the inside with two stops 61 and 62 which have a steep latching flank interacting with the bolt 32 and a ramp-like ramping flank. The stop 61 determines the full load position and the stop 62 the normal load position. In the two end pivot positions, the adjusting lever strikes the adjusting housing, namely in position A in the idle position and in position D in the cold start position.

Auf der Innenseite der anderen Stellgehäusehälfte 7 ist eine Rastsperre 10 in Gestalt eines elastisch zurückweichenden Vorsprungs angeordnet, die in der Vollaststellung (Position C) mit dem Rasthebel 3 zusammenwirkt und einen Anschlag bildet, der auch dann wirksam wird, wenn der Rasthebel 3 durch den Auslöseknopf 31 eingedrückt und daher der Riegel 32 in den Stellhebel eingezogen ist. Diese Rastsperre weicht elastisch zurück, wenn bei gedrücktem Rasthebel der Stellhebel weiter in Richtung auf die Position D verschwenkt wird.On the inside of the other adjusting housing half 7 there is a detent 10 in the form of an elastically retracting projection which cooperates with the detent lever 3 in the full load position (position C) and forms a stop which also becomes effective when the detent lever 3 is actuated by the release button 31 pressed in and therefore the bolt 32 is drawn into the adjusting lever. This detent moves back elastically if the actuating lever is pivoted further in the direction of position D while the detent lever is pressed.

Zwischen der Leerlaufstellung (Position A) und der Normalstellung (Position B) trägt die Innenseite der Stellgehäusehälfte 6 einen Rastbereich 63, dessen Rasten mit der Rastnase 33 des Riegels 32 zusammenwirken. Hierdurch wird eine feinfühlige Rasteinstellung ermöglicht.Between the idle position (position A) and the normal position (position B), the inside of the actuating housing half 6 carries a latching area 63, the latches of which interact with the latching lug 33 of the latch 32. This enables a sensitive detent adjustment.

Das Stellgehäuse 2 ist, wie aus Fig. 1 ersichtlich, am Griffholm 12 eines Rasenmähers befestigt. Das Stellgehäuse könnte jedoch auch mit einer am Führungsholm angeordneten Traverse vereinigt sein.As can be seen from FIG. 1, the adjusting housing 2 is fastened to the handle bar 12 of a lawnmower. However, the control housing could also be combined with a crossbar arranged on the guide bar.

Die Vorrichtung arbeitet wie folgt:

Vor oder nach dem Abschalten des Motors wird der Stellhebel 1 vorzugsweise in die Leerlaufstellung (Position A) überführt. Um den kalten Motor anzulassen, wird der Stellhebel aus der Leerlaufstellung (Position A) in die Kaltstartstellung (Position D) überführt. Zu diesem Zweck wird der Auslöseknopf 31 gedrückt, so daß der Riegel 32 zurückgezogen wird. Der Stellhebel kann dann an den Anschlägen 62 und 61 vorbeigefahren werden. Beim zügigen Durchfahren der Vollaststellung (Position C) wird auch die Rastsperre 10 überwunden.The device works as follows:

Before or after switching off the engine, the control lever 1 preferably transferred to the idle position (position A). To start the cold engine, the control lever is moved from the idle position (position A) to the cold start position (position D). For this purpose, the release button 31 is pressed so that the latch 32 is withdrawn. The actuating lever can then be moved past the stops 62 and 61. When the full load position (position C) is passed quickly, the detent lock 10 is also overcome.

Nach dem Anlassen kann der Stellhebel, ohne daß der Auslöseknopf gedrückt wird, bis in die Leerlaufstellung (Position A) zurückgeführt werden. Um mehr Gas zu geben und um Leistung und Drehzahl zu erhöhen, kann dann der Stellhebel ohne Knopfdrücken wieder bis in die Normalstellung (Position B) überführt werden, wobei über die Rastnase 33 im Rastfeld 63 jede Stellung beibehalten werden kann. Aus der Normallaststellung kann durch Drücken des Auslöseknopfes 31 der Anschlag 62 überwunden werden, und der Stellhebel kann in die Vollaststellung (Position C) überführt werden. Selbst wenn dabei der Auslöseknopf 31 gedrückt gehalten bleibt, wird dem Überfahren der Vollaststellung durch Anschlag an die Rastsperre 10 ein Widerstand entgegengesetzt. Wird der Auslöseknopf 31 losgelassen, wird der Riegel 32 vor den Anschlag 61 gebracht.After starting, the control lever can be returned to the idle position (position A) without pressing the release button. In order to give more gas and to increase power and speed, the adjusting lever can then be moved back to the normal position (position B) without pressing a button, with each position being able to be maintained in the locking field 63 via the locking lug 33. From the normal load position, the stop 62 can be overcome by pressing the release button 31, and the actuating lever can be transferred to the full load position (position C). Even if the release button 31 is kept pressed, the resistance to overrunning the full load position by a stop on the detent 10 is opposed. If the release button 31 is released, the bolt 32 is brought in front of the stop 61.

Ein weiteres Ausführungsbeispiel der Erfindung zeigen die Figuren 9 bis 11. Innerhalb eines nicht dargestellten Gehäuses ist auf einer Platine 21 ein Drehzapfen 22 angeordnet, um den ein mit einem Handgriff 11 ausgestatteter Stellhebel 23 schwenkbar ist. Auf dem Stellhebel ist in Längsrichtung desselben eine Rastkulisse 25 verschiebbar gelagert. Diese Rastkulisse weist einen Längsschlitz 26 auf, mit dem sie auf einer auf den Drehzapfen 22 aufgesetzten Führungsscheibe 27 läuft, deren oberer Flansch auf der Rastkulisse benachbart zum Längsschlitz liegt. Die Führungsscheibe wird durch eine auf den Drehzapfen 22 aufgeschraubte Mutter gehalten. Die Rastkulisse wirkt mit einem Rastsegment 28 zusammen, das auf der Platine 21 aufgeschraubt ist. Das Rastsegment weist zwischen der Leerlaufstellung (Pos.A) und der Normallaststellung (Pos.B) Rastzähne 29 auf, die mit einer Rastnase 30 der Rastkulisse zusammenwirken. Das Rastsegment trägt ferner einen Formschlußanschlag 41 für Normallast und einen Formschlußanschlag 42 für Vollast. Diese Formschlußanschläge 41, 42 wirken mit einem Anschlagriegel 43 der Rastkulisse 25 zusammen. Die Rastkulisse 25 ist durch eine Feder 44 auf das Rastsegment 28 vorgespannt. Die Feder ist einerseits an einem abgebogenen Lappen 45 der Rastkulisse und andererseits an einem abgebogenen Lappen 46 des Stellhebels 23 verankert.A further exemplary embodiment of the invention is shown in FIGS. 9 to 11. A pivot pin 22 is arranged on a circuit board 21 within a housing (not shown) about which an adjusting lever 23 equipped with a handle 11 can be pivoted. A latching link 25 is slidably mounted on the adjusting lever in the longitudinal direction thereof. This latching link has a longitudinal slot 26, with which it runs on a guide disk 27 placed on the pivot pin 22, the upper flange of which lies on the latching link adjacent to the longitudinal slot. The guide disc is held by a nut screwed onto the pivot pin 22. The latching backdrop interacts with a latching segment 28 which is screwed onto the circuit board 21. The locking segment points between the idle position (item A) and the normal load position (item B) locking teeth 29, which interact with a locking lug 30 of the locking link. The detent segment also carries a positive lock stop 41 for normal load and a positive lock stop 42 for full load. This form-fitting stops 41, 42 cooperate with a stop bolt 43 of the locking link 25. The locking link 25 is biased by a spring 44 on the locking segment 28. The spring is anchored on the one hand on a bent tab 45 of the locking link and on the other hand on a bent tab 46 of the actuating lever 23.

Am hinteren Ende der Rastkulisse greift eine Zugstange 47 an, die an einem Auslöseknopf 48 verankert ist, der auf dem nach oben abgebogenen Teil des Stellhebels 1 verschiebbar ist.At the rear end of the locking link, a pull rod 47 engages, which is anchored to a release button 48, which is displaceable on the part of the adjusting lever 1 bent upwards.

Die in den Figuren 9 bis 11 dargestellte Stellvorrichtung arbeitet wie folgt:

In der Stellung zwischen Leerlauf und Normallast (zwischen Position A und Position B) kann mit dem Handgriff 11 der Stellhebel bewegt werden, wobei die Rastnase 30 der Rastkulisse 25 mit den Rastzähnen 29 des Rastsegmentes 28 zusammenwirkt. In der Normallaststellung schlägt der Riegel 43 gegen den Anschlag 41 an. Dieser Anschlag kann überwunden werden, indem der Auslöseknopf 48 gezogen wird, wodurch die Rastkulisse gegen Federkraft zurückgezogen wird. Bei weiter Verschwenken des Stellhebels trifft der Anschlagriegel 43 auf den Anschlag 42 für Vollast (Position C). Dieser Anschlag kann wiederum überwunden werden, indem der Auslöseknopf 48 gezogen wird. Dann kann der Stellhebel weiter in die Position D verschwenkt werden, in der ein Gehäuseanschlag vorgesehen ist. Dies ist die Stellung für Kaltstart. Beim Zurückschieben des Stellhebels wird die Rastkulisse durch die schrägen Auflauframpen der Anschläge 42 und 41 ausgehoben und kann in den Bereich zwischen Position A und B verschoben werden. An dem Stellhebel ist ein Bowdenzug befestigt, der die Reglerfeder für die Drehzahlregelung betätigt.The adjusting device shown in FIGS. 9 to 11 works as follows:

In the position between idling and normal load (between position A and position B), the adjusting lever can be moved with the handle 11, the latching lug 30 of the latching link 25 cooperating with the latching teeth 29 of the latching segment 28. In the normal load position, the bolt 43 strikes against the stop 41. This stop can be overcome by pulling the release button 48, whereby the locking link is pulled back against spring force. When the adjusting lever is pivoted further, the stop bolt 43 hits the stop 42 for full load (position C). This stop can in turn be overcome by pulling the release button 48. Then the adjusting lever can be pivoted further into position D, in which a housing stop is provided. This is the position for cold start. When the control lever is pushed back, the latching link is lifted by the inclined run-up ramps of the stops 42 and 41 and can be moved into the area between positions A and B. A Bowden cable is attached to the control lever, which actuates the control spring for speed control.

Claims (10)

Leistungssteuervorrichtung, insbesondere für zum Antrieb von Rasenmähern und anderen Gartengeräten vorgesehenen Brennkraftmaschinen, mit einem durch Hand oder Fuß bedienbaren mechanischen Stellglied (1), welches gegen formschlüssige Anschläge für Leerlauf (Position A) und Vollast (Position C) anlegbar ist,
dadurch gekennzeichnet, daß im Bewegungspfad des Stellgliedes (1) zwischen Leerlaufstellung (Position A) und Vollaststellung (Position C) ein weiterer Formschlußanschlag (62) für Normallast (Position B) vorgesehen ist, und daß das Stellglied (1) einen manuell betätigbaren Auslöser (3) zum Überfahren des weiteren Formschlußanschlages aufweist.Power control device, in particular for internal combustion engines intended for driving lawn mowers and other garden tools, with a mechanical actuator (1) which can be operated by hand or foot and which can be applied against positive stops for idling (position A) and full load (position C),
characterized in that a further positive locking stop (62) for normal load (position B) is provided in the movement path of the actuator (1) between idle position (position A) and full load position (position C), and that the actuator (1) has a manually operated trigger ( 3) for driving over the further positive stop. Leistungssteuervorrichtung nach Anspruch 1,
dadurch gekennzeichnet, daß der Vollastanschlag (10) als formschlüssige Rastsperre ausgebildet ist und im Bewegungspfad des Stellhebels jenseits der Vollaststellung (Position C) ein Kaltstartanschlag (Position D) vorgesehen ist, und daß die Rastsperre elastisch ausweichend ausgebildet ist.Power control device according to claim 1,
characterized in that the full load stop (10) is designed as a positive locking catch and in the movement path of the actuating lever beyond the full load position (position C) a cold start stop (position D) is provided, and that the locking catch is designed to be elastically evasive. Leistungssteuervorrichtung nach den Ansprüchen 1 und 2,
dadurch gekennzeichnet, daß in der Vollaststellung (Position C) außer der Rastsperre (10) ein weiterer Anschlag (61) vorgesehen ist, der über den Auslöser (31) entriegelbar ist.Power control device according to claims 1 and 2,
characterized in that in the full-load position (position C), in addition to the detent (10), a further stop (61) is provided which can be unlocked via the trigger (31). Leistungssteuervorrichtung nach einem der Ansprüche 1 - 3,
dadurch gekennzeichnet, daß das Stellglied als Stellhebel (1) ausgebildet ist, der in einem Stellgehäuse (2) um eine Achse (E) verschwenkbar ist und einen durch den Auslöser (31) aushebbaren Anschlagriegel (32) aufweist und daß der Rastriegel mit Formschluß-Anschlägen (61, 62) im Inneren des Stellgehäuses zusammenwirkt, die eine steile Anschlagflanke und eine flache Auflaufflanke besitzen.Power control device according to one of claims 1-3,
characterized in that the actuator is designed as an actuating lever (1) which can be pivoted about an axis (E) in an actuating housing (2) and has a stop bolt (32) which can be lifted out by the trigger (31) and that the latching bolt with positive locking Interacts (61, 62) in the interior of the control housing cooperate, which have a steep stop flank and a flat ramp flank. Leistungssteuervorrichtung nach Anspruch 4,
dadurch gekennzeichnet, daß der Stellhebel hohl ausgebildet und aus zwei Halbschalen (4, 5) zusammengesetzt ist, die einen Rasthebel (3) umschließen, der einen aus dem Handgriff (11) des Stellhebels vorstehenden Auslöseknopf (31) trägt.A power control device according to claim 4,
characterized in that the control lever is hollow and is composed of two half-shells (4, 5) which enclose a locking lever (3) which carries a release button (31) protruding from the handle (11) of the control lever. Leistungssteuervorrichtung nach Anspruch 5,
dadurch gekennzeichnet, daß der Rasthebel (3) an seinem inneren Ende eingespannt und in Richtung der Drehachse (E) des Stellhebels gegen Federdruck verstellbar ist, und daß an dem Rasthebel (3) der Anschlagriegel (32) vorgesehen ist, der durch eine Ausnehmung der Halbschale (5) auf die Rastanordnung auf der Innenseite der Stellgehäusehälfte (6) vorsteht und daß der Rasthebel (3) durch Eigenelastizität oder durch eine Feder in seine Raststellung vorgespannt ist.Power control device according to claim 5,
characterized in that the latching lever (3) is clamped at its inner end and is adjustable against spring pressure in the direction of the axis of rotation (E) of the actuating lever, and in that the stop latch (32) is provided on the latching lever (3) which is formed by a recess in the Half-shell (5) protrudes on the locking arrangement on the inside of the adjusting housing half (6) and that the locking lever (3) is biased into its locking position by its own elasticity or by a spring. Leistungssteuervorrichtung nach den Ansprüchen 4 - 6,
dadurch gekennzeichnet, daß der Anschlagriegel (32) an seiner vorderen Stirnseite eine Rastnase (33) trägt, die mit einem Rastfeld (63) auf der Innenseite der Gehäusehälfte zusammenwirkt.Power control device according to claims 4-6,
characterized in that the stop bolt (32) carries on its front face a locking lug (33) which interacts with a locking field (63) on the inside of the housing half. Leistungssteuervorrichtung nach Anspruch 1,
dadurch gekennzeichnet, daß das als Stellhebel (23) ausgebildete Stellglied schwenkbar gelagert ist und längsverschieblich eine Rastkulisse (25) trägt, die mit einem Rastsegment (28) zusammenwirkt, welches Rastzähne (29) und Formschlußanschläge (41, 42) für Normallast (Position B) und Vollast (Position C) aufweist.Power control device according to claim 1,
characterized in that the actuator designed as an actuating lever (23) is pivotally mounted and carries a latching link (25) which is longitudinally displaceable and which cooperates with a latching segment (28) which engages latching teeth (29) and form-fitting stops (41, 42) for normal load (position B ) and full load (position C). Leistungssteuervorrichtung nach Anspruch 8,
dadurch gekennzeichnet, daß die durch eine Feder (44) gegen das Rastsegment (28) vorgespannte Rastkulisse (25) durch einen Auslöseknopf (48) auslösbar ist.A power control device according to claim 8,
characterized in that the latching link (25), which is biased against the latching segment (28) by a spring (44), can be released by a release button (48). Leistungssteuervorrichtung nach Anspruch 9,
dadurch gekennzeichnet, daß der Auslöseknopf auf dem abgebogenen Ende des Stellhebels verschiebbar und durch die den Handgriff (11) des Stellhebels erfassende Hand betätigbar ist.Power control device according to claim 9,
characterized in that the release button is displaceable on the bent end of the adjusting lever and can be actuated by the hand gripping the handle (11) of the adjusting lever.
EP92106342A 1991-04-15 1992-04-13 Power control device, particularly for internal combustion engines for driving lawn mowers Expired - Lifetime EP0509427B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9104571U DE9104571U1 (en) 1991-04-15 1991-04-15 Power control device, in particular for internal combustion engines intended for driving lawn mowers
DE9104571U 1991-04-15

Publications (2)

Publication Number Publication Date
EP0509427A1 true EP0509427A1 (en) 1992-10-21
EP0509427B1 EP0509427B1 (en) 1995-05-24

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EP92106342A Expired - Lifetime EP0509427B1 (en) 1991-04-15 1992-04-13 Power control device, particularly for internal combustion engines for driving lawn mowers

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EP (1) EP0509427B1 (en)
AT (1) ATE122843T1 (en)
DE (2) DE9104571U1 (en)
ES (1) ES2072651T3 (en)

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CN108496526A (en) * 2017-02-24 2018-09-07 苏州宝时得电动工具有限公司 A kind of walking machine equipment and its control method, device and equipment
CN113465530A (en) * 2021-05-18 2021-10-01 浙江工业大学之江学院 Computer visual detection auxiliary device

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Publication number Priority date Publication date Assignee Title
DE10304329A1 (en) * 2003-02-04 2004-08-12 Mann + Hummel Gmbh Displacement arrangement for energy generating system, especially internal combustion engine, has at least one flexible shaft for transferring force between actuator and final control element

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AU440748B2 (en) * 1970-05-06 1973-09-20 Victa Limited Improvements in control cable actuators for prime movers
US4126054A (en) * 1976-03-08 1978-11-21 Incom International Inc. Control means
US4438658A (en) * 1981-12-14 1984-03-27 Capro, Inc. Engine throttle control
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FR2551942B1 (en) * 1983-09-21 1985-11-08 Wolf Outils CONTROL DEVICE AND GRASS PICKING BASKET FOR LAWN MOWER
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AU440748B2 (en) * 1970-05-06 1973-09-20 Victa Limited Improvements in control cable actuators for prime movers
US4126054A (en) * 1976-03-08 1978-11-21 Incom International Inc. Control means
US4438658A (en) * 1981-12-14 1984-03-27 Capro, Inc. Engine throttle control
US4611502A (en) * 1985-10-11 1986-09-16 Arens Controls, Inc. Throttle control assembly

Cited By (3)

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Publication number Priority date Publication date Assignee Title
CN108496526A (en) * 2017-02-24 2018-09-07 苏州宝时得电动工具有限公司 A kind of walking machine equipment and its control method, device and equipment
CN113465530A (en) * 2021-05-18 2021-10-01 浙江工业大学之江学院 Computer visual detection auxiliary device
CN113465530B (en) * 2021-05-18 2023-01-13 浙江工业大学之江学院 Computer visual detection auxiliary device

Also Published As

Publication number Publication date
ES2072651T3 (en) 1995-07-16
DE59202293D1 (en) 1995-06-29
ATE122843T1 (en) 1995-06-15
DE9104571U1 (en) 1991-07-18
EP0509427B1 (en) 1995-05-24

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