SE466679B - Blade for lawn mower, and cutting member for such a blade - Google Patents

Blade for lawn mower, and cutting member for such a blade

Info

Publication number
SE466679B
SE466679B SE8801357A SE8801357A SE466679B SE 466679 B SE466679 B SE 466679B SE 8801357 A SE8801357 A SE 8801357A SE 8801357 A SE8801357 A SE 8801357A SE 466679 B SE466679 B SE 466679B
Authority
SE
Sweden
Prior art keywords
unit
blade
cutting means
edge
cutting member
Prior art date
Application number
SE8801357A
Other languages
Swedish (sv)
Other versions
SE8801357D0 (en
SE8801357L (en
Inventor
R Jahren
Original Assignee
Husqvarna Ab
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 Husqvarna Ab filed Critical Husqvarna Ab
Priority to SE8801357A priority Critical patent/SE466679B/en
Publication of SE8801357D0 publication Critical patent/SE8801357D0/en
Priority to DK162089A priority patent/DK166981B1/en
Priority to NO891430A priority patent/NO170561C/en
Priority to FI891742A priority patent/FI89663C/en
Publication of SE8801357L publication Critical patent/SE8801357L/en
Publication of SE466679B publication Critical patent/SE466679B/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01D—HARVESTING; MOWING
    • A01D34/00—Mowers; Mowing apparatus of harvesters
    • A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
    • A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
    • A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
    • A01D34/73—Cutting apparatus

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Harvester Elements (AREA)

Abstract

The present invention concerns a blade for a lawn mower, which comprises an elongate plate-shaped central unit 10 intended to be secured in the vertical drive shaft of a lawn mower, the end sections 13 of the central unit being able to turn about a longitudinal central axle of the unit, and each end section having a blade-shaped cutting member 14 whose one half 15 is twisted in relation to the other half 16. Cutting members and unit are provided with members 20, 19, respectively, by means of which the parts can be fixed to each other so that the half 15 of the cutting member projects radially beyond the end section 13 of the unit 10 and forms a primary cutting edge 17. The cutting member 14 is arranged, in relation to the end section 13 of the unit 10, in such a way that its other half 16 projects in front of the unit, as seen in the direction of rotation of the blade, in order thereby to form a secondary cutting edge 21. The invention also concerns a cutting member 14 intended to be used together with the blade. <IMAGE>

Description

466 679 Ett utföringsexempel av uppfinningen kommer nu att beskrivas med hänvisning till bifogad ritning där fig. 1 utgör en frontvy av kniven, fig. 2 är en horisontalprojektion av kniven och fig. 3 är en sidovy av kniven. 466 679 An embodiment of the invention will now be described with reference to the accompanying drawing where Fig. 1 is a front view of the knife, Fig. 2 is a horizontal projection of the knife and Fig. 3 is a side view of the knife.

Såsom framgår av figurerna består kniven av en central bladformad enhet 1Û med ett mittparti 11 i vilket det finns hål 12 med vars hjälp kniven kan fästas vid drivaxeln.As can be seen from the figures, the knife consists of a central blade-shaped unit 1Û with a central portion 11 in which there are holes 12 by means of which the knife can be attached to the drive shaft.

Den centrala enheten har ändpartier 13 som är vridna runt en längsgående mittaxel så att den i rotationsriktningen sett främre delen är belägen ovanför den bakre delen.The central unit has end portions 13 which are rotated about a longitudinal central axis so that the front part seen in the direction of rotation is located above the rear part.

Vardera ändpartiet 13 uppbär ett rakbladsformat skärorgan 14 vars ena halva 15 är vriden i förhållande till den andra halvan 16 så att skärorganet får ett propellerformat utseende. Den ena halvan 15 av skärorganet utsticker utanför den centrala enhetens ändparti 13 och bildar en primäregg 17 avsedd att klippa det växande gräset. Den andra halvan 16 är fixerad vid undersidan av den centrala enhetens ändparti 13 genom ett skruvförband 18. Skruven är därvid införd genom ett av flera hål 19 resp. 20 på ändpartiet 13 hos den centrala enheten 1D' resp. den andra halvan 16 hos skärorganet. Genom att välja lämpliga samverkande hål kan klippbredden förändras.Each end portion 13 carries a razor blade-shaped cutting member 14, one half of which is rotated relative to the other half 16 so that the cutting member has a propeller-shaped appearance. One half 15 of the cutting member protrudes outside the end portion 13 of the central unit and forms a primary edge 17 intended to mow the growing grass. The second half 16 is fixed to the underside of the end portion 13 of the central unit by a screw connection 18. The screw is then inserted through one of several holes 19 resp. 20 on the end portion 13 of the central unit 1D 'resp. the other half 16 of the cutting means. By selecting suitable cooperating holes, the cutting width can be changed.

Hålen 19 resp. 20 är så placerade i förhållande till varandra att skärorganet skjuter ut framför den centrala enheten för att därigenom forma en sekundär egg 21.Holes 19 resp. 20 are positioned relative to each other so that the cutting member projects in front of the central unit to thereby form a secondary edge 21.

Företrädesvis bildas eggarna 17, 21 genom att skärorganet är avfasat längs sin främre kant.Preferably, the edges 17, 21 are formed in that the cutting member is chamfered along its leading edge.

Genom att sekundäreggen utgör en del av den detalj som uppvisar primäreggen kommer de båda eggarna att utbytas samtidigt varigenom hela knivens skärpa avsevärt förbättras vilket befrämjar sönderdelningen av det avklippta gräset.Because the secondary edge forms part of the part that has the primary edge, the two edges will be replaced at the same time, whereby the sharpness of the entire knife is considerably improved, which promotes the disintegration of the cut grass.

Claims (4)

rerpšsfl”. f, 466 679 Patentkravrerpšs fl ”. f, 466,679 Claims 1. Kniv för gräsklippare vilken innefattar en långsträckt plattformad central enhet (10) avsedd att infästas i en gräsklipparen tillhörande vertikal drivaxel varvid ändpartierna (13) hos den centrala enheten är vridna runt en enhetens tillhörande längsgående mittaxel och varvid vardera ändpartiet uppbär ett blad- format skärorgan (14) vars ena halva (15) är vriden i förhållande till den andra halvan (16) samt att skärorgan och enhet är försedda med organ (20 resp. 19) med vars hjälp skärorganet kan fixeras vid enheten så att skärorganets ena halva(15) utskjuter radiellt utanför enhetens (10) ändparti(l3) och bildar en primär egg (17), k ä n n e t e c k n a d d ä r a v, att skärorganet (14) är så anordnat i förhållande till enhetens (10) ändparti (13) att dess andra halva (16) utskjuter framför enheten sett i knivens rotationsriktning för att härigenom bilda en sekundär egg (21).A lawnmower knife comprising an elongate platform central unit (10) for attachment to a vertical drive shaft of a lawnmower, the end portions (13) of the central unit being rotated about an associated longitudinal center axis of the unit and each end portion bearing a blade-shaped cutting means (14) one half (15) of which is rotated relative to the other half (16) and that cutting means and unit are provided with means (20 and 19, respectively) by means of which the cutting means can be fixed to the unit so that one half of the cutting means ( 15) projects radially outside the end portion (13) of the unit (10) and forms a primary edge (17), characterized in that the cutting means (14) is so arranged relative to the end portion (13) of the unit (10) that its second half (16) projects in front of the unit seen in the direction of rotation of the knife to thereby form a secondary edge (21). 2. Skärorgan för den i patentkravet 1 angivna kniven, k ä n n e t e c k n a t d ä r a v, att det består av en till propellerform vriden huvudsakligen rektangulär platta med en halva (15) som uppvisar en primäregg (17) som sträcker sig längs en del av plattans ena kant samt en andra halva (16) med en sekundär egg (21) som utgör en fortsättning av sagda kant.Cutting means for the knife as claimed in claim 1, characterized in that it consists of a substantially rectangular plate twisted into a propeller shape with a half (15) having a primary edge (17) extending along a part of one of the plates edge and a second half (16) with a secondary edge (21) which forms a continuation of said edge. 3. Skärorgan enligt patentkravet l, k ä n n e t e c k n a t d ä r a v, att den andra halvan (16) innefattar organ för att fästa den vid en central enhet ( 10).Cutting means according to claim 1, characterized in that the second half (16) comprises means for attaching it to a central unit (10). 4. Skärorgan enligt patentkravet 3, k ä n n e t e c k n a t d ä r a v, att fästorganet består av ett antal hål (20) som är belägna längs en linje som sträcker sig parallellt med sagda kant.Cutting means according to claim 3, characterized in that the fastening means consists of a number of holes (20) which are located along a line extending parallel to said edge.
SE8801357A 1988-04-13 1988-04-13 Blade for lawn mower, and cutting member for such a blade SE466679B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
SE8801357A SE466679B (en) 1988-04-13 1988-04-13 Blade for lawn mower, and cutting member for such a blade
DK162089A DK166981B1 (en) 1988-04-13 1989-04-04 KNIFE FOR GRAASLAMA MACHINE
NO891430A NO170561C (en) 1988-04-13 1989-04-06 MOWER KNIFE KNIFE
FI891742A FI89663C (en) 1988-04-13 1989-04-12 Lawn Mower Knife

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8801357A SE466679B (en) 1988-04-13 1988-04-13 Blade for lawn mower, and cutting member for such a blade

Publications (3)

Publication Number Publication Date
SE8801357D0 SE8801357D0 (en) 1988-04-13
SE8801357L SE8801357L (en) 1989-10-14
SE466679B true SE466679B (en) 1992-03-23

Family

ID=20371996

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8801357A SE466679B (en) 1988-04-13 1988-04-13 Blade for lawn mower, and cutting member for such a blade

Country Status (4)

Country Link
DK (1) DK166981B1 (en)
FI (1) FI89663C (en)
NO (1) NO170561C (en)
SE (1) SE466679B (en)

Also Published As

Publication number Publication date
NO891430L (en) 1989-10-16
FI89663C (en) 1993-11-10
FI89663B (en) 1993-07-30
FI891742A0 (en) 1989-04-12
NO170561B (en) 1992-07-27
NO170561C (en) 1992-11-04
DK162089A (en) 1989-10-14
FI891742A (en) 1989-10-14
SE8801357D0 (en) 1988-04-13
DK162089D0 (en) 1989-04-04
DK166981B1 (en) 1993-08-16
NO891430D0 (en) 1989-04-06
SE8801357L (en) 1989-10-14

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