DE19644057A1 - Resilient drawbar with cutting height adjustment thread for lawn mowers - Google Patents

Resilient drawbar with cutting height adjustment thread for lawn mowers

Info

Publication number
DE19644057A1
DE19644057A1 DE1996144057 DE19644057A DE19644057A1 DE 19644057 A1 DE19644057 A1 DE 19644057A1 DE 1996144057 DE1996144057 DE 1996144057 DE 19644057 A DE19644057 A DE 19644057A DE 19644057 A1 DE19644057 A1 DE 19644057A1
Authority
DE
Germany
Prior art keywords
height adjustment
resilient
cutting height
thread
helical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE1996144057
Other languages
German (de)
Inventor
Friedrich Hensberg
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.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE1996144057 priority Critical patent/DE19644057A1/en
Publication of DE19644057A1 publication Critical patent/DE19644057A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01DHARVESTING; MOWING
    • A01D34/00Mowers; Mowing apparatus of harvesters
    • A01D34/01Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/74Cutting-height adjustment
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01DHARVESTING; MOWING
    • A01D2101/00Lawn-mowers

Abstract

The resilient drawbar is made from round or angular spring wire shaped into one or more helical windings and changing adjoining these windings into a longer straight area in the axial direction or roughly in the axial direction of the windings. The longer straight area may be bent or angled at the end which is provided with one or more notches which allow a safety element to be stuck on. The height adjustment knob has a thread matching the thread form of the draw bar.

Description

Die Erfindung betrifft federnde Zugstangen mit Schnitthöhenverstell-Gewinden für zentrale Schnitthöhenverstellungen von motorisch betriebenen handgeführten Rasenmähern.The invention relates to resilient tie rods with cutting height adjustment threads for central Cutting height adjustments of motor-operated hand-operated lawnmowers.

Bei den bekannten zentralen Schnitthöhenverstellungen für motorisch betriebene handgeführte Rasenmäher mit gewindeförmigen Schnitthöhenverstell-Elementen ist nachteilig, daß ein Gewindeteil, eine Zugstange, ein Bolzen, der die Zugstange mit dem Gewindeteil schwenkbar verbindet, und ein Bolzen, der das andere Ende der Zugstange mit einem Hebel eines schwenkbaren Achsenbügels des Rasenmähers verbindet, erforderlich sind, um einen Achsenbügel (meist Hinterachsenbügel) so zu schwenken, daß hierdurch die Schnitthöhenverstellung erfolgt.With the known central cutting height adjustments for motor-operated hand-held lawn mowers with thread-shaped cutting height adjustment elements is disadvantageous that a threaded part, a pull rod, a Bolt that pivotally connects the tie rod to the threaded part, and a bolt that connects the other end the tie rod connects with a lever of a pivotable axis bracket of the lawnmower required are to pivot an axle bracket (usually rear axle bracket) so that the The cutting height is adjusted.

Bei der federnden Zugstange mit Schnitthöhenverstell-Gewinde für zentrale Schnitthöhenverstellungen motorisch betriebener handgeführter Rasenmäher nach meiner Erfindung wird der Nachteil der vielen Teile dadurch überwunden, daß die Aufgabe des Gewindeteils (die Schnitthöhe zu verändern), daß die Aufgabe der Zugstange (die Kraft zum Schwenken eines Achsenbügels zu übertragen) und die Aufgaben der beiden Bolzen (die die notwendige Schwenkbewegung der Zugstange ermöglichen) von nur einem Teil aus rundem oder eckigem Federstahldraht übernommen werden. Im Gewindebereich ist dieses Teil schraubenfeder-förmig ausgebildet. Im Zugstangenbereich schließt sich ein gerader zylindrischer bzw. prismatischer Bereich in der Achsenrichtung des schraubenfeder-förmigen Bereiches an. Am unteren Ende des geraden Bereiches des Teiles ist das Teil kurz rechtwinklig abgewinkelt. Der abgewinkelte kurze Haken am unteren Ende wird in die entsprechende Bohrung des Hebels eines Achsenbügels (vorteilhaft mit Vorspannung in Steckrichtung) gesteckt. Der rechtwinklig abgewinkelte Teil der Zugstange kann mit einer oder mehreren Kerben versehen sein, die das Haften eines Sicherungselementes bewirken können. Der Federstahldraht-Durchmesser bzw. Querschnitt ist so gewählt, daß das Teil die Schwenkbewegung des Hebels am Achsenbügel leicht durch Federung mitmacht, aber genügend Drucksteifigkeit gegen Ausknicken bei den maximal auftretenden Druckkräften besitzt. Der schraubenfeder-förmige Bereich des Teiles kann am Ende abgebogen oder abgewinkelt sein. Der Höhenverstellknopf (das Betätigungselement für die Schnitthöhenverstellung) erhält ein zu der Schraubenform des Teiles passendes Gewinde (meist Innengewiede).With the resilient tie rod with cutting height adjustment thread for central cutting height adjustments Motorized handheld lawn mower according to my invention becomes the disadvantage of many parts overcome that the task of the threaded part (to change the cutting height) that the task of Drawbar (to transmit the force to pivot an axle bracket) and the tasks of the two bolts (which enable the necessary pivoting movement of the drawbar) from only one part made of round or square spring steel wire. In the threaded area, this part is helical educated. In the area of the tie rods, a straight cylindrical or prismatic area closes in the Axis direction of the coil spring-shaped area. At the bottom of the straight section of the part the part is angled at right angles. The angled short hook at the bottom ends in the Corresponding hole in the lever of an axle bracket (advantageously with preload in the direction of insertion) stuck. The right-angled part of the pull rod can be provided with one or more notches be that can cause the adhesion of a securing element. The spring steel wire diameter or Cross-section is chosen so that the part easily through the pivoting movement of the lever on the axle bracket Suspension, but sufficient pressure rigidity against buckling at the maximum occurring Possesses compressive forces. The coil spring-shaped area of the part can be bent or at the end be angled. The height adjustment button (the actuating element for the cutting height adjustment) receives a thread matching the screw shape of the part (mostly internal thread).

Claims (2)

1. Federnde Zugstange mit Schnitthöhenverstell-Gewinde für zentrale Schnitthöhenverstellung motorisch betriebener handgeführter Rasenmäher, dadurch gekennzeichnet, daß diese federnde Zugstange aus rundem oder kantigem (prismatischem) Federdraht besteht, der zu einer oder mehreren schraubenfederförmigen Windungen geformt ist und daß der Federdraht, an diese schraubenförmigen Windungen anschließend, in einen längeren geraden Bereich in Achsrichtung oder etwa in Achsrichtung der schraubenförmigen Windungen übergeht und daß dieser längere gerade Bereich am Ende abgebogen oder abgewinkelt ist und daß dieses abgewinkelte Ende mit einer oder mehreren Kerben versehen sein kann, die das Haften eines Sicherungselementes bewirken können.1. Resilient pull rod with cutting height adjustment thread for central cutting height adjustment of motor-operated hand-operated lawnmowers, characterized in that this resilient pull rod consists of a round or angular (prismatic) spring wire which is shaped into one or more helical spring-shaped windings and that the spring wire, to these helical Subsequently, turns into a longer straight area in the axial direction or approximately in the axial direction of the helical turns and that this longer straight area is bent or angled at the end and that this angled end can be provided with one or more notches which cause the securing element to adhere can. 2. Federnde Zugstange mit Schnitthöhenverstell-Gewinde für zentrale Schnitthöhenverstellung motorisch betriebener handgeführter Rasenmäher nach Anspruch 1, dadurch gekennzeichnet,daß der schraubenförmige Bereich der federnden Zugstange am Ende abgebogen oder abgewinkelt sein kann und daß der Höhenversteilknopf ein zu der Gewindeform der federnden Zugstange passendes Gewinde hat.2. Resilient tie rod with cutting height adjustment thread for central cutting height adjustment by motor Operated hand-operated lawn mower according to claim 1, characterized in that the helical area of the resilient tie rod can be bent or angled at the end and that the height adjustment knob has a thread that matches the thread shape of the resilient pull rod.
DE1996144057 1996-10-31 1996-10-31 Resilient drawbar with cutting height adjustment thread for lawn mowers Withdrawn DE19644057A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1996144057 DE19644057A1 (en) 1996-10-31 1996-10-31 Resilient drawbar with cutting height adjustment thread for lawn mowers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1996144057 DE19644057A1 (en) 1996-10-31 1996-10-31 Resilient drawbar with cutting height adjustment thread for lawn mowers

Publications (1)

Publication Number Publication Date
DE19644057A1 true DE19644057A1 (en) 1998-05-07

Family

ID=7809770

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1996144057 Withdrawn DE19644057A1 (en) 1996-10-31 1996-10-31 Resilient drawbar with cutting height adjustment thread for lawn mowers

Country Status (1)

Country Link
DE (1) DE19644057A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11172607B2 (en) 2016-06-30 2021-11-16 Tti (Macao Commercial Offshore) Limited Autonomous lawn mower and a system for navigating thereof
US11357166B2 (en) 2016-06-30 2022-06-14 Techtronic Outdoor Products Technology Limited Autonomous lawn mower and a system for navigating thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11172607B2 (en) 2016-06-30 2021-11-16 Tti (Macao Commercial Offshore) Limited Autonomous lawn mower and a system for navigating thereof
US11357166B2 (en) 2016-06-30 2022-06-14 Techtronic Outdoor Products Technology Limited Autonomous lawn mower and a system for navigating thereof

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
8139 Disposal/non-payment of the annual fee