SE193694C1

SE193694C1 -

Info

Publication number: SE193694C1
Authority: SE
Publication date: 1964-01-01

Description

KLASS INTERNATIONELLSVENSK H 02 g21 c:19/06 PATENT- OCH REGISTRERINGSVERKET Ans. 5029/1960 inkom den 21/5 1960 utlagd den 4./5 1964 I-1 BROZIAT, ALLENSBACH A. B., FORBUNDSREPUBLIKEN TYSKLAND Motordriven fin- och kabelupp- och avlindningsanordoing med en pa det roterbart anordnade motorhuset anbragt kabeltrumma Prioritet begard fran den 24 jzud och 4 december 1959 (Forbundsrepublthen Tyskland) Foreliggande uppfinning avser en motordriyen lin- och kabelupp- och avlindningsanordfling med en pa det roterbart anordnade motorhuset anbragt kabeltrumma. CLASS INTERNATIONAL SWEDISH H 02 g21 c: 19/06 PATENT AND REGISTRATION AGENCY Ans. 5029/1960 was received on 21/5 1960 issued on 4/5 1964 I-1 BROZIAT, ALLENSBACH AB, FEDERAL REPUBLIC OF GERMANY Motor-driven fine and cable winding and unwinding device with a cable drum mounted on the rotatably arranged motor housing Priority requested from 24 December 4, 1959 (Federal Republic of Germany) The present invention relates to a motor-driven cable and cable winding device with a cable drum arranged on the rotatably arranged motor housing.

Dylika anordningar ha hittills manovrerats av en motor eller en spiralfjader via en vaxel. Such devices have hitherto been maneuvered by a motor or a coil spring via a gear.

Medelst en fjadermotor drivna hasplar aro behaftade med den nackdelen, att periferikraften avtager proportionellt med den upplindade kabellangden °eh de tillata darfor en upplindning av endast en mycket begransad kabellangd. Vid avlindningen upptrader motsatt verkan, ju stone kabellangd, som avdrages fran haspeln, desto storre blir omkretskraften och Okar ibland till ett for kabelns draghallfashtet icke tillatet varde. Coils driven by a spring motor have the disadvantage that the peripheral force decreases in proportion to the wound cable length, and they therefore allow a winding of only a very limited cable length. During unwinding, the opposite effect occurs, the longer the cable length, which is subtracted from the reel, the greater the circumferential force and Okar sometimes to a value that is not allowed for the cable's drawbar strength.

Motorvinschar av vanlig konstruktion erfordra stora tekniska fOranstaltningar for att mOjliggora ett tillrackligt elastiskt arbetande yid konstant vridmoment. Motor winches of ordinary construction require large technical measures to enable a sufficiently elastic working yid constant torque.

F6r foreliggande uppfinning ligger det problemet till grund for att astadkomma en motordriven kabelupp- och avlindningsanordning med enkel konstruktion och enkelt verkningssatt, som arbetar vid teoretiskt obegransade kabellangder med konstant vridmoment och som vid 6verskridande av detta vridmoment tillater ett godtyckligt snabbt avdragande av kabeln fran haspeln. F6religgande uppfinning Sr Sven baserad pa problemet att uppdela en motors vridmoment enligt ett onskat forhallande, sa att icke pa vanligt satt rotorn avger den totala effekten utan endast en brakdel av denna, medan »statorm avger resten. For the present invention, the problem lies in providing a motor-driven cable winding and unwinding device with simple construction and simple actuation, which operates at theoretically unlimited cable lengths with constant torque and which, when this torque is exceeded, allows an arbitrarily rapid pulling of the cable from the reel. The present invention is based on the problem of dividing the torque of a motor according to a desired ratio, so that in the usual way the rotor emits the total power but only a fraction of it, while the stator emits the rest.

Varje aktion av rotorn motsvaras av en lika stor reaktion hos statorn. Lagras bada vridbart, vridas de motsatt varandra, och motorn kan salunda icke langre avge nagon effekt, eftersom den f6r detta andamal erforderliga reaktionen fattas. I den grad motorhuset bromsas, dvs. nat. Ater en reaktion alstras, Dupl. kl. 47 k: 7/00 'Aar motorns effektavgivning. Alit efter graden av bromsning liar man dill& till sitt for- fogande en mojlighet att avgrena en stone eller mindre del av motoreffekten och genom motsvarande minskning av reaktionen anvanda statorn f Or upplindning av exempelvis en anslutningskabel. Each action of the rotor corresponds to an equal reaction of the stator. If both are rotatably mounted, they are rotated opposite each other, and the motor can thus no longer give off any power, since the reaction required for this purpose is taken. To the extent that the motor housing is braked, ie. nat. Again a reaction is generated, Dupl. at 47 k: 7/00 'Aar engine power output. Depending on the degree of braking, you have at your disposal an opportunity to branch a stone or a smaller part of the motor power and by correspondingly reducing the reaction use the stator for winding up, for example, a connecting cable.

Enligt uppfinningen uppnas detta darigenom, att motorhuset eller motoraxeln Sr for- bunden med en en sliming astadkommande broms. Harvid utnyttj as den fysikaliska lagen, att varje kraft alstrar en lika stor, motsatt riktad kraft. According to the invention, this is achieved in that the motor housing or motor shaft Sr is connected to a brake which produces a sliming. In doing so, the physical law is used, that each force produces an equal, oppositely directed force.

Den en sliming alstrande bromsanordningen kan besta av ett pa motoraxeln anbragt, I luft eller annat flytande medium rOrligt flathjul, medan en steglos reglering kan astadkommas medelst en installningspropeller eller en fjfiderpaverkad, mekanisk broms i synnerhet en slirkoppling. The slimming device producing a slimming can consist of a flat wheel mounted on the motor shaft, in air or other liquid medium, while a stepless control can be achieved by means of an installation propeller or a spring-actuated mechanical brake, in particular a slip clutch.

Anordningen enligt uppfinningen kan med fordel anvandas for upplindning av kabeln till en elektrisk grasklippningsmaskin. The device according to the invention can advantageously be used for winding the cable to an electric lawn mower.

Om i enlighet med uppfinningen saval motorhuset med en elmotors magnetlindning som ankaret med motoraxeln aro vridbart lagrade och motorhuset Sr forsett med en kabeltrumma, medan motoraxeln omfattar en en slir- ning astadkommande broms, t. ex. flaktskov- lar, vridas motorns hada delar i motsatta riktningar med olika av slirningen betingade vrid- moment. Alit efter storlekenslirningen av- arenas en motsvarande del av den av motoraxeln avgivna, totala effekten av motorn for vridning av motorhuset. If in accordance with the invention the motor housing with an electric motor magnetic winding as the armature with the motor shaft is rotatably mounted and the motor housing Sr provided with a cable drum, while the motor shaft comprises a brake producing a slip, e.g. flat blades, the hada parts of the engine are turned in opposite directions with different torques due to the slippage. After the size slip, a corresponding part of the total power of the motor delivered by the motor shaft is rotated to rotate the motor housing.

Det elastiska arbetssattet av anordningen enligt uppfinningen tillater utan vidare en avdragning air upplindad kabel vid inkopplad motor, om den utovade dragkraften Overstiger motorns vridmoment. The elastic mode of operation of the device according to the invention readily allows a stripping of air wound cable when the motor is switched on, if the applied tensile force exceeds the torque of the motor.

Pa den bifogade ritningen visas tva utfo- 2— — ringsexempel pa anordningen enligt uppfinningen. Fig. 1 dr en delvis skuren sidovy av en elektrisk grasklippare med roterbart lagrat motorhus med kabeltrumma. Fig. 2 ar ett langdsnitt genom en modifierad utforingsform med stationart lagrat matorhus, pa vilket en kabeltrumma dr roterbart lagrad. The accompanying drawing shows two exemplary embodiments of the device according to the invention. Fig. 1 shows a partially cut side view of an electric lawn mower with rotatably mounted motor housing with cable drum. Fig. 2 is a longitudinal section through a modified embodiment with stationary mounted feed housing, on which a cable drum is rotatably mounted.

Utforingsexemplen avse elektriska grasklippare med elanslutningskablar, som lindas upp automatiskt. Pa den pa hjul 1 korbara stalplastramen 2 ãr i de hada visade utfOringsexemplen monterad en med vertikal axel 3 arbetande elmotor. The exemplary embodiments refer to electric lawnmowers with electrical connection cables, which are wound up automatically. On the steel plastic frame 2 which can be crossed on wheels 1, the embodiments shown have a mounted electric motor operating with a vertical shaft 3.

Vid utforingsexemplet enligt fig. 1 är en el-motors hus 4 upptill och nedtill roterbart lag-rat i kullager 5 och 6. Det undre kullagret 5 dr fast pd ramen 2 och det ovre kullagret 6 pa en bygel 7. IVIotorhuset 4 dr forsett med en kabeltrumma 8. Pd undre anden av motoraxeln 3 är grasklippningskniven 9 forsedd med en sliming astadkommande broms, i de -visade exemplen bestaende av flaktvingar 10. In the exemplary embodiment according to Fig. 1, an electric motor housing 4 is rotatably mounted at the top and bottom in ball bearings 5 and 6. The lower ball bearing 5 is fixed to the frame 2 and the upper ball bearing 6 is mounted on a bracket 7. The motor housing 4 is provided with a cable drum 8. On the lower end of the motor shaft 3, the lawnmower knife 9 is provided with a sliming brake, in the examples shown consisting of flat blades 10.

Vid inkopplad motor roterar motoraxeln 3 med kniven 9 och f15.ktvingarna 10 i en riktning, medan motorhuset 4 samtidigt roterar i motsatt riktning, tills anslutningskabeln 11 stracks. Grasklipparen kan med kabelupplindningsanordningen enligt uppfinningen f orflyttas utan anstrangning och utan risk Mr att man skall kora over kabeln och skara av denim med den egna maskinen och darigenom t. o. in. under vissa omstandigheter utsatta sig for elektriska stotar. Denna risk 10- religger alltid vid tidigare kanda elektriska grasklippare utan automatisk kabelupplindningsanordning. Uppfinningen medlar salunda avert i elektriskt avseende en avsevard for-bathing av driftsakerheten ho s dylika apparater. When the motor is connected, the motor shaft 3 rotates with the knife 9 and the clamps 10 in one direction, while the motor housing 4 simultaneously rotates in the opposite direction, until the connecting cable 11 is stretched. With the cable winding device according to the invention, the lawnmower can be moved without effort and without the risk of having to cross the cable and cut denim with one's own machine and thereby even in. under certain circumstances exposed to electric shocks. This risk always exists with previously known electric lawnmowers without an automatic cable winding device. The invention thus mediates in electrical terms a considerable pre-bathing of the operational safety of such devices.

Vid utforingsexemplet enligt fig. 2 dr motorhuset 4 med stotbultar 12 stationart anordnat pa maskinramen 2. Pa den undre an-den av motoraxeln 3 anbragta grasklippningskniven 9 uppbar emellertid i detta fall icke nhgon bromsanordning. In the exemplary embodiment according to Fig. 2, the motor housing 4 with impact bolts 12 is arranged stationary on the machine frame 2. However, in this case the grass cutting knife 9 arranged on the lower second of the motor shaft 3 did not have any braking device.

Pa motorhuset 4 dr medelst kullager 13, 14 roterbart lagrad en kabeltrumma 8, pa vilken den godtyckligt langa anslutningskabeln 11 i enlighet med foreliggande uppfinning automatiskt lindas upp under motorns verksamhet och pa sd sdtt alltid halles spand. Detta uppnas genom en mellan motoraxeln 3 och den roterbara kabeltrumman 8 anbragt, med sliming arbetande koppling eller bromsanordning. For detta andamal aro vid utforingsformen i fig. 2 i det mellan andvaggarna 16 resp. 17 pa motorhuset 4 resp. kabeltrumman 8 bildade utrymmet 18 anordnade flaktvingar 10 pa motoraxelns 3 ovre ande, som vid mo- torns verksamhet lOpa runt i luft eller annat flytande medium, t. ex. vatten eller olja. Rummet 18 uppvisar en mad tvarsnittsfOrtrangningar i form av radiellt anordnade vinkelstycken 19, medelst vilka i samverkan med storleken av vingarna 10 den Onskade bromskraften. kan stallas in. Som bromsanordning kan Oxen tj Ana en med installbar sliming verkande slirkoppling. A cable drum 8 is rotatably mounted on the motor housing 4 by means of ball bearings 13, 14, on which the arbitrarily long connecting cable 11 in accordance with the present invention is automatically wound during the operation of the motor and in this way always kept buckets. This is achieved by a coupling or braking device arranged between the motor shaft 3 and the rotatable cable drum 8. For this purpose, in the embodiment of Fig. 2 in the space between the duck walls 16 and 17 on the motor housing 4 resp. the cable drum 8 formed the space 18 arranged flat wings 10 on the upper end of the motor shaft 3, which during the operation of the motor run around in air or other liquid medium, e.g. water or oil. The space 18 has a large cross-sectional constriction in the form of radially arranged angle pieces 19, by means of which, in cooperation with the size of the wings 10, the desired braking force. can be set. As a braking device, Oxen can use a slip clutch acting with installable slimming.

For att motorn skall forses med striim, Or kabelns 11 borjan ansluten till tvd i kabeltrummans 8 inre anbragta slapringar 20, fran vilka motorn erhaller spanning via slapkontaktema 21. In order for the motor to be supplied with a strip, the top of the cable 11 is connected to two in the inner slip rings 20 arranged on the cable drum 8, from which the motor receives voltage via the slap contacts 21.

Verkningssattet av anordningen enligt uppfinningen dr sadant, att vid rotation av motoraxeln 3 bromsanordningen 10, 19 verkar som slirkoppling och soker medfora kabeltrumman 8 i samma rotationsriktning, sa att kabeln 11 alltid av den medelst slirkopplingen resp. bromsanordningen installda verkan les spand. The actuation of the device according to the invention in such a way that when the motor shaft 3 rotates the brake device 10, 19 acts as a slip clutch and seeks to carry the cable drum 8 in the same direction of rotation, so that the cable 11 always by the slip clutch resp. brake device installed action read bucket.

Claims

Patent claim:

Motor-driven cable and cable winding and unwinding device with a cable drum arranged in a rotatably arranged motor housing, characterized in that the motor housing (4) or the motor shaft (3) is connected to a brake (10) which produces a slim-fling.

Device according to claim 1, characterized in that it provides a slimming device. (10) consists of a movable wheel arranged in a pH motor shaft (3) arranged in air or other liquid medium.

Device according to claim 1, characterized in that the brake device (10) consists of a spring-actuated mechanical brake, in particular a slip clutch.

4. Device according to claim 1, characterized in that the braking device (10) is provided with an installation propeller.

Device according to any one of the preceding patent claims, characterized in that it is used for winding the connecting cable (11) to a movable electric motor, in particular for grass cutting machines. Cited publications: U.S. Patent Nos. 2,487,395.