SE204876C1

SE204876C1 -

Info

Publication number: SE204876C1
Application number: SE1313964A
Authority: SE
Original assignee: Veithpirelli Aktiengesellschaft
Priority date: 1964-01-30
Filing date: 1964-11-02
Publication date: 1966-05-31
Also published as: DK120981B; BE658989A; LU47166A1; NL132302C; NL6412992A; AT272867B; DE1505197A1; CH419871A

Description

Uppfinnare: K Moth och M Wieser Prioritet begard fr an den 30 januari 1964 (Forbundsrepubliken Tyskland, V 272) Fiireliggande uppfinning hanfor sig till en dubb, som for Ruing av greppet i stort antal insattas i fordonsdack. Dessa dack aro kanda under beteckningen »vinterdack». De lampa sig speciellt for karning ph hal is och isgata. Inventors: K Moth and M Wieser Priority requested from 30 January 1964 (Federal Republic of Germany, V 272) The present invention relates to a stud, which is inserted into the vehicle tire in large numbers for the grip of the grip. These roofs are known as «winter tires». They are especially suitable for karning ph slippery ice and ice street.

Olika utforingsformer for dubbar aro redan forut kanda. Salunda har man redan anvant dubbar, vid vilka ett hardmetallstift har inbaddats i en mantel av plast. Fordclen med denna dubh ãr den ringa vikten, som inverkar gynnsamt pa korningen, da den ofjadrade massan hos fordonet, speciellt hos hjulen och dacken minskas. Sasom nackdel har det emellertid vid denna dubb visat sig, att en Whackligt saker fastsittning endast uppnas, nar med pa sa satt bestyckade clack Mires med lag hastighet. Erforderligt är emellertid, att med som aro utrustade med dubbar, farter av minst 130 km per timme kunna uppnas. Various embodiments of studs are already known. Salunda has already been used for studs, in which a carbide pin has been embedded in a plastic sheath. The vehicle with this stud is the light weight, which has a favorable effect on the grain, as the unsprung mass of the vehicle, especially of the wheels and tires, is reduced. As a disadvantage, however, it has been shown in this stud that a Whackligt thing attachment is only achieved when equipped in this way clack Mires at low speed. It is necessary, however, that with as aro equipped with studs, speeds of at least 130 km per hour can be achieved.

Vidare har det visat sig vara av nackdel, att plastmanteln genom refflorna pa den yttre omkretsen framkallade spanningar och sedan sprickor, som ledde till, att delar av manteln losbrOts och att hardmetallinsatsen gick Vidare upptrada genom avsaknaden av ett huvud pa dubben hoga specifika tryck, som verka skadligt pa bottengummit och fillgen. Furthermore, it has been found to be disadvantageous that the plastic jacket through the grooves on the outer circumference produced stresses and then cracks, which led to parts of the jacket breaking loose and the carbide insert going Furthermore, due to the absence of a head on the stud, high specific pressures occur, which have a detrimental effect on the bottom rubber and the rim.

Man har darfor aven tillverkat och anyint dubbar, vilkas stilt likaledes bestod av hardmetall, men som hade fattningar av Mgt notningsfast specialstal. Vid dessa dubbar visade det sig emellertid sasom ytterst ofordelaktigt, att de hade en hog vikt, och att den ofjadrade massan hos fordonet avsevart iikades. En sarskild nackdel hos dessa dubbar lag aven dari, att vid laming pa torr vag temperaturer av upp till 10 uppmattes i dubbarna. Denna varmeinverkan forstorde emellertid snabbt det omgivande gummit, sit att dubbarna sedan sutto lost i dacken och gingo forlorade. It has therefore also been manufactured and any studs, which still consisted of hard metal, but which had sockets of Mgt notable special steel. In the case of these studs, however, it turned out to be extremely disadvantageous that they had a high weight and that the unsprung the mass of the vehicle was significantly equalized. A particular disadvantage of these studs is also that when lambing on dry vague temperatures of up to 10 were measured in the studs. However, this heat effect quickly enlarged the surrounding rubber, so that the studs then sat loose in the tires and were lost.

Ett andamal med uppfinningen är att undanroja de beskrivna bristerna och avhjalpa dessa, vilket sker genom en pa hardmetallinsatsen formpressad lattmetalhnantel och ett varmeisolerande yttre he* av keramiskt material. An object of the invention is to obviate the described defects and remedy them, which is done by means of a light metal jacket molded on the carbide insert and a heat-insulating outer shell of ceramic material.

Ytterligare kannetecken och fordelar hos dubben enligt uppfinningen framga av efterfoljande beskrivning av det it bifogade riffling schematiskt askadliggjorda utforingsexemplet. Further features and advantages of the stud according to the invention will become apparent from the following description of the accompanying rifle, schematically damaged embodiment.

Ritningen visar hardmetallinsatsen 1, omkring vilken lattmetallmanteln 2 an Word formpressad. Genom formpressningen forbindes hardmetallinsatsen och lattmetallmanteln till ett byggnadselement, varav den fordelen uppkommer, att hardmetallstiftet endast behOver ha den langd, som an erforderlig for dess verkan vid korningen. Dubben forblir alltsa verksam, till daeket fir utslitet och av denna orsak icke langre Or anvandbart. Genom nedf8randet av lattmetallrnanteln till nithuvudet ligger vridpunkten djupare an vid hittillsvarande utforanden, sit att dubben icke kan avbrytas. Genom avkortningen av den vardefulla hardmetallinsatsen intrader ett avsevart fiirbilligande av dubben. Jamfort med den med plastmantel omgivna kanda dubben 2 är f8rbindningen mellan manteln och insatsen sarskilt fast, emedan det med plast ar svart att uppna en pakrympning. The drawing shows the cemented carbide insert 1, around which the light metal jacket 2 of Word is molded. By molding, the cemented carbide insert and the slatted metal casing are connected to a building element, the advantage of which is that the cemented carbide pin only need to have the length required for its effect on the grain. The stud thus remains effective, until the tire is worn out and for this reason is no longer usable. By lowering the light metal mantle to the rivet head, the pivot point is deeper than in previous embodiments, so that the stud cannot be interrupted. The shortening of the valuable carbide insert introduces a considerable reduction of the stud. Compare with the kanda stud surrounded by a plastic jacket 2 the connection between the jacket and the insert is particularly firm, since it is black with plastic to achieve a package shrinkage.

Ritningen visar, att dubben dessutom liar annu ett varmeisolerande yttre holje 3, som bestar av keramiskt material. Detta isolerholje kan t. ex. paforas genom pressning, och forhindrar en utvidgning av lattmetalhnanteln, sa att hardmetallinsatsen icke kan gà forlorad. Huvuduppgiften hos ytterholjet bestar emellertid dari att halla det upptradande varmet borta fran det omgivande gummit. The drawing shows that the stud also has a heat-insulating outer casing 3, which consists of ceramic material. This insulating oil can e.g. paforas by pressing, and prevents an expansion of the light metal mantle, so that the cemented carbide insert can not be lost. The main task of the outer casing, however, is to keep the heat occurring away from the surrounding rubber.

Sammanfattningsvis framkomma for dub-ben enligt uppfinningen f8ljande f8rdelar: Genom formpressning oklanderligt sakert faste for hardmetallinsatsen i manteln. In summary, for studs according to the invention, the following advantages emerge: By compression molding impeccably securely fastened to the carbide insert in the jacket.

Avkortning av hardinetallinsatsen och harigenom forbilligande. Shortening of the hard metal insert and thereby reduction.

Forlaggning av vridpunkten neat, dvs. inat i dacket. Relocation of the turning point neat, ie. inat i dacket.

Varmeisolering gentemot gummit i dacket. Thermal insulation against the rubber in the tire.

Bortledning av varmet utett genom lattmetallmanteln. Conduction of heat leaking through the light metal jacket.

Lag vikt genom anvandandet av lattmetall och keramiskt material, varigenom den ofjadrade massan hos fordonet reduceras. Light weight through the use of light metal and ceramic material, thereby reducing the unsprung mass of the vehicle.

En dubb enligt uppfinningen kan exempelvis uppvisa foljande matt. A stud according to the invention may, for example, have the following mat.

Vid en totallangd hos dubben av 15,5 mm liar hardmetallinsatsen 1 en langd av 9,5 mm och ett tvarsnitt av 2,3 mm. Ytterdiametern has lattmetallmanteln 2 uppgar till 3,9 mm och langden till 13 mm. Vid den ena anden avslutar lattmetallmanteln 2 likformigt med isolerholj et, under det att hardmetallstiftet 1 skjuter ut 1 mm, Vid den motsatta anden är lattmetallmanteln 2 nitformigt utbildad. Diametern has nithuvudet uppgar till 5,5 mm och hojden till 2 mm. Genom derma utbildning uppnas en god forbindning av lattmetallmanteln 2 och keramikholjet 3. Keramikholjet 3 har en diameter av 6,3 mm och en langd av 14,5 mm, varvid den ena anden Or utbildad nitformig. Nithuvudet har en diameter av 10 mm. At a total length of the stud of 15.5 mm, the cemented carbide insert 1 has a length of 9.5 mm and a cross section of 2.3 mm. The outer diameter of the light metal jacket 2 amounts to 3.9 mm and the length to 13 mm. At one end, the light metal jacket 2 terminates uniformly with the insulating housing, while the cemented carbide pin 1 protrudes 1 mm, At the opposite spirit, the light metal jacket 2 is rivet-shaped. The diameter of the rivet head is 5.5 mm and the height is 2 mm. Through this formation a good connection of the slatted metal jacket 2 and the ceramic casing 3 is obtained. The ceramic casing 3 has a diameter of 6.3 mm and a length of 14.5 mm, one spirit Or being formed rivet-shaped. The rivet head has a diameter of 10 mm.

I sialva dacken finnas urborrningar, som ha en diameter av 2,6 mm och en langd av 13,5 mm. Genom den visade utformningen av nithuvudet uppnas ett sakert faste for hela dubben. Radien av (1,8 mm vid ytterdiarnetern (10 mm) forhindrar en sonderrivning av gummit. In the sialva roofs there are holes, which have a diameter of 2.6 mm and a length of 13.5 mm. The shown design of the rivet head achieves a secure fastening for the entire stud. The radius of (1.8 mm at the outer diaphragm (10 mm) prevents a probe tear of the rubber.

Claims

Patent claim Air carbide insert (1) and casing (2) consisting of studs for vehicle tires, characterized by a light metal casing (2) molded on the carbide insert (1) and a heat-insulating outer casing (3) of ceramic material. Request publications: Patents treat France 585 396.