DE1582378A1 - Machine with swiveling knives, especially lawn mowers - Google Patents

Description

"Machine with swiveling knives, especially rabbit mowers".

The invention relates to a machine with rotatably driven tools, in particular a mower, in which at least one knife of each pair of knives working together during cutting is arranged so as to be tiltable. '

When using such tiltable knives, the advantage is achieved that the reaction force, which is created by the pressure on the object to be cut, provides a moment about the tilting axis, whereby the pressure of the knives on each other is greater at the point of the cutting action, The greater the degree of flexibility exercised. As a result, they only need to be pressed lightly on each other in an unloaded state and there are considerable losses of friction

009820/0103 BADORLGiNAL

PHN 1555

apart "loan made the" driving noise of the Kippmesaera, e.g., im Drive point, support so resiliently, that the knife is always light remains pressed down, but this is not easy to do perform because the mentioned force of action of the to be cut Object too; one. Component supplies, which the mentioned resilient Tried to push in the support so that the van was an aerart size Applying spring force would have to save the friction losses becomes illusory when idling.

The invention bezweckty for ¹ 'this problem to provide a solution ,, and is characterized in that an adjusting device is provided for a drive arm of the tilting "diameter, which affects the pressure of the cutting edges to each other and the two standing in perpendicular to each other ¹ Dichtungenbewegbar guided, contains blocks pressed against one another by a spring, one of which attacks on an arm of the tiltable .Lessera, these blocks being slidable against one another with beveled surfaces, in a direction lying between the above-mentioned perpendicular guide directions: ¹ it runs ... - _:

As will be explained in more detail below, one thus obtains the Ability to create a hiring with just a slight Pressing the Keaa cutting edges at Leeslauf, while still a Increase in the mentioned pressure component on the resilient support of the drive arm, as required, and any play in the drive point automatically compensated for by readjustment, even in the event of wear. '.

t · -; .. ..... ■■■■ ■,

Exemplary embodiments of the invention are shown in the drawing and are described in more detail below. Show it

Fi ^, 1 «ine schematic friperspectival representation, one back and pivotally driven knife from a series of such

kesser for a K £ hbalken _f . "

2 shows a schematic representation of the relevant drive point in a drive beam to explain the problem,

? iis. 3 shows a first exemplary embodiment of the invention Solution, to ^ e ^ asst to Fig. «2,

Fi. . 4 ä.ne improved solution »adapted to Fit :. 1, as intersection in its A ^ -plane.

In? I «:. 1 shows a knife 1 with a drive arm 2, which is intended as one of a series of such knives in a fcähbalken that carries feet 'underknives, some of which, lying on both sides of the arm 1, are indicated by 3 and 4 are shown. i; the Juähbalken itself is not set up, but the position is shown in a coordinate system ΧΪ « , / ,, in which the geeencesser 3 and 4 are in the /.Y-plane and the ielenti point; ■ <of the arm 2 ir. the Znchse lies and is mounted in a wall of the LJiLbalkens "which coincides with the YZ-plane. The irojektionaliRien mean that the knife 1 has an inclined position in relation to the AY-plane and, as it were, protrudes through this plane. The center line 6 of the drive arm shows an even greater inclination above the Χϊ plane on which the cutting effect takes place.

Lie figure further shows the. »Ncrinun *: one im (not shown ::} kShbaleans. and in. Its longitudinal direction back and forth

O '

O herbewetbaren Ar. Drive beam 7. Inside is the driven end 8

<o - -. ■■■ '. ■■

OO of the drive arcs 2 jeues leasers 1 of the .leihe driven, two-sided

° arbe: tender i-esser in a storage block 9 au: gencaiaen »·

t that im in.? i «. 1 instant shown ^. in the current aas kesser 1 to the right ir. the figure moves, then '"finds,';

. ^ BAD OfUGlNAL \ ΐ.,

■■■ - '. Copy ■> ;. '. ^

£, in cutting resistance K introduces .V.on.eivt around the! .. ittüllinie

des ^ rms 2 here, which endeavors to tip the Olerr: .esser 1. Las l'ntel'rnesser 4 hinders this Kippbev.e.:ur! _f and - \ 'bt_does this by exerting a force Kp ₁ on the upper knife. The Loraei.tonai-s Ic i supplies

Will successively _o edrückt this LrucK., With the -irashalnen the Lesser at the interface between tO ".,.-Iunn 'alto theoretiscn a iiert ijull have at idle l'.ets'-ir uni s-' :. it also, in the aar ^ eateilten let, on the "running off" cutting edge of the kessere, ie on aer ijeite, where ias Lesser J lies, wlche jchnej ciüante with 'err represented movement - this knife after rt-c: .ts, is not effective. The idle riding losses will be ir.it. atari; r · .. · iuzitrt, while the l / jerk aer! verhinaer:..... because viie Jchnittwirkun _t autcr.atipcn the -.iv'ösc-i "OAER smaller £ ÜR the i'uÄxiwirkunj to those j .u enblick erf rit.rl Jc.t ... force adapts.

iiür.scht you ui.ter -uller ".υΐηεί '-'- ΰϊ .. i-ii · leicrite resilient nn -rücKut fj J eater H ^ i Timir-of, au · ;;,... b _t : L ..er: 'λ'ϊ;, which among other things to 7er- ::. eidur., ven opi-jl aucr. nacr. spole; ar. trv. Vr .;; ht irt, then wVrde .lian ..- r. ersttr ^ tvl.e in tine in? ij. Z ϋ. \ ·. ^ tell t ■ · xinvranunt; der./er .. In thesez · / io-U "is the drive-.be; .ur.kt ^: i Jes i .. ^ i, -. 1 shown .-. Efcserarir.s 2 sc: .er: .atisc ;. als eir ^ es ^: 1 · .ε..ϋ; partly I see sen-upright

Q guides 11 in the storage block _; ", the. one hand wrong. Antrietsbalk & n 7

(O iir.jjecrdi.et it, darrestell ".. I> as k- ^ _c elfcrn: i _f e .-. Rmc-nde 'j leans on

^ ° ei. he by <il otirn a Juchse 1; _; - ':. iiaettn j latte 12 ab, .velcne O

The socket is perpendicular to the guide. versc: .iecbax * is urn through a spring 14 O is pressed up.

Las sich lewejrei.äe ..easer 1 becomes -dädurcr. r.it one through iie '

BATH

Spring 14 exerted force. On the counter knife 3 and 4 kept pressed. In this case, however, the problem occurs that the spring pressure of the spring 14 must be at least so great that it can achieve the maximum K ,, (for the deep movement, see Fig. T) or K _N9 (for the left movement) that occurs at full load. In addition, the spring return leads to pressure forces on the two cutting edges of the oversized diameter. This results in idling losses (and wear) to an extent that one would just like to avoid.

FIG. J now shows an embodiment suitable for this, in which a spring also (indirectly) cooperates with the drive arm 7. The ball 8 of the drive point is supported on a block 17 which can be displaced between two parallel guides 1p and 16 and which is supported with an inclined surface 16 on a wedge-shaped body 19 which, via a guide track 20 of the drive ^{beam 7, is in a n} (ichtun ^, in which it is pressed laterally by a spring 21 with a force P _{t is} displaceable.

One can assume a setting in which, when idling, a slight elastic pressure of the upper knife on the inner knife is obtained, and this pressing force can be kept at a low Aert, while nevertheless an increase in the force Κ ,,, (or . K _N p) is possible according to requirements.

If one denotes namely the coefficient of friction on the surfaces 18 and 20 by £ ' or f and the (selected small) wedge inclination by ψ , while the coefficient of friction f is neglected for the vertical guide (15 * 16), then the following applies approximately for the force K exerted on the ball 8 when the wing moves upwards

■ ■ '■ ": + ρ 009 820/0103 bad ORIGINAL

tgtu + (f + f)

with downward movement:

IC

lav

₁ + r ₂ )

With Aendei'urif: vcn ^, f and f _o one can choose any ratio between? T and * ■ *, ancate rr.it. '»Citen. rr.it ei; .er small force i: ^ for the resilient pressure when idling k = inn mar. P ^ divide into a word one, aer over de :, r.oi'inal occur: .the inert vcr. K., baw.

K _N2 g ^

Fife. 4- refers to eiiic ji.us:'"üi.rur^sfcrir, in which an iitu -'.- lerunt- der Lc'sungc according to VLi . 5 3iit -iintia / ederaysten; is combined, 'ia.s one L * eberloadun _ü - £ protection provides that becomes effective when a driven r..esser blocked; wirj.

jüer .-. drive point -. .. aes _a r.triebSb.r2is for each back and 'erreher.de angetriebei.e Leiser i: "t here i :: 2't a La.jerblcck, acen-enöi on ^, the" .ui '^ abe eir.es four aurci.one it-der _e ; e _; reneir.a: .aer gedrüc.-tten 515'cK.e 1? and 1 ^> * ie these to Hani der / i =: *; The other of the high-pitched surfaces 24 resting against each other is formed by the corner 25. These two views 21 and 25 are each perpendicular to one of two .tici.tunken, standing on top of one another, movable gc; "ührt, nänlicr. the hicck 2; ^; . in .- ntriebsbalken 7 i- ^r - Aessen Len "n _f srichtunr and the other in: iichtun ^ perpendicular to it, aer" ii.ni ei: provides .cc rVaertellers 2b Special hillside ^ Lie r'eaer "Dafur that the.. ilock 2 · cit eir.er .vraft r feaernd is pressed »This u'eder, however, at the same time fulfills a task in the aforementioned

, Ό the protective spring system, the zj wirnsar. becomes, if between the driven eater and a je ^ eninczzer a. ^ tein lengthened, whereby the

_ powered leaser is blocked ¹ . ..enn i & with a beatimater nert aer from the drive bar J to the -ir, drive point t θ · towards. transmitting. If the force is exceeded, the structure of the blocks 23 and 2p gives way relatively

. · COPY f

M 1555

opposite your drive bar J opposite dec. Spring pressure, that the reciprocating movement of the AntrieLsbulkens 7 can continue (the unlocked üesser the i..es; are driven -e.rreihen) but uer driving point of the locked A.essers remains resting, wShrend never exerted thereon. "Tntrifcbst.r ^ i't no.t r.vöäser is determined as being determined by the spring pressure 'f ... To evade this relative when the pace of the liver treads the force t in both. seals- (for a bilateral acting Lesser, to enable, supports eic :, the structure 2; »? 5 of the ElOCKe on one side {.» .- ^ en a spring plate 26 ah-, which is from one at 26 on the antrim Iaarm supporting Reder 29 h £ C ⁿ a HIiSCr ₁ Ia .--} is printed in this drive Sara 0, tntcegen the pressure of this spring 29 has the spring plate 26 alao a · ■ AUsweicLac '"!" ichkeit. the üpannung of the springs 27 and 29 is now dug such that the fire 29 exerts a n.raft 2P. Zn the attorney authorizing 23, 25 with the force P of the spring is pressed .i 27 on the other side against the. Reder plate?, the relative divergence of the spring plate is occur to the right: when 'the driving force of the driving point: the.. »ert P at ~ ne * et, ur.

However, as I said, the CT celebration also fulfills the requirements. «. Task that the spring 21 Ir. Fig. 3 is assigned. Ler Ainkel ψ, which the inclined K.or: taktfläc: .e 24 between dei: both 31c "cker. 23 and. Z'y r.it the itichtur.g of the ivraft t includes, is chosen much larger than aer in Fig. i.

°° Lai-rch it will be possible to have the: .ac:. ^ Part! Effect on block 23

-vjiurch the Fecerkrait r how this ar. r.ar.- i-; r Fi ^ .. 3 described -wurdef.

- <om £ die = eist desired ..is ^ u to achieve, although, arian3 than in the

education .; also - ^: 'i £. 3 "-iie a. Met tl · i! Ir of this pen as well.

n to eriül ^. ^ e: _t-e. as i.nurs. ier «.-, - r, -: _e uci öderer / eile _w -

'- BAD ORIGINAL

-B-

against LJeberlastunjr with '"blocking of the Lesser previously b, already on one pretty high value was set.

Certain neglects that were permissible with a small angle ψ , us. Applying the above formulas for K with a sufficiently precise approximation no longer applies to larger fourths of φ (e.g. 7C- to SC °). - * '

if you are in these. Case den. <Eibun,; skceff icient f of the vertical guidance of the rlockg 23 (along the spring plate 26), but f _? (Führurif; of block 25 im, uitrietstnlken 1) neglected, Ü'.ost sicli follow.des derive: ".

K _ffiv t = (COt ^ - T ₁ - f ₃ ) P

If the "ΐηκεΐ ψ jross is chosen, it also occurs that the block 2'ö only needs to be moved after a very small distance geyenürser the block 2; ur a. of the celebration 27} cui, so that the i.acj.stellffekt occurs under allt-n "circumstances in the same» eist-.

009820/0103

Claims (1)

T58Z378 -3- . I * ■ machine with pivotable driven around a pivot point Knives, especially mowing machines, used by everyone when cutting cooperating pair of knives arranged at least one knife tiltable is, characterized in that an adjusting device for a Drive arm of the tiltable knife is provided, the pressure of the Cutting edges influenced one another and the two in perpendicular to one another Standing. Seals movably guided, by a spring pressed against each other blocks, one of which on an .arm of the tiltableJ / iössers attacks, these blocks slidable with beveled Surfaces rest against each other in a between the . mentioned perpendicular guide directions lying on top of one another Hielitüng run. ■ 2, machine according to claim T of the type that has a support beam with two xieihen-bilateral working better contains, whereby the Llesser at least one of the none pivots around mainly perpendicular on the working floor standing oxen are arranged and by one common fin drive beams are driven, characterized in that that the pivotably arranged can be tilted better; their drive arm are arranged whose drive point is in a bearing block that one of the blocks of the adjusting device pressed against one another by a spring forms, while the blocks are slidable together in the longitudinal direction of the drive beam in a loading protection spring system Q .- ■ - ■ - .. ■ -. ■ ■; : ι _m are included, which allows a shift when a certain fourth of the force to be transmitted is exceeded » ° 3 · ■ Kaechine according to claim 2, characterized in that Sa? _ω Gex'ugt the blocks is supported on one side against a spring plate, the spring supported on the drive arm by Feiner against a BATH ORIGINAL ^WiS ' ⁵⁵⁵ ir. iiese-s ~ .ntri <-: is pressed very poorly for which, contrary to the spring action, has an alternative vcm »ngQhlat * βίί,» ährerid read the feeling of the corner on the other side of you. he i'eaer pulled the / eaerteller is pressed, which is about the! -. Illfte of the mentioned., from the other over Jler au: 'the ^ ederteller eiuvi £ rk & iicien /. calls j.usVct. 009820/0103