Elastic mounting for track pivot pins in caterpillar tracks

B - Operations – Transporting – 62 – D

Patent

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Details

B62D 55/215 (2006.01) B62D 55/21 (2006.01)

Patent

CA 2170524

In hinge tracks with rubber mountings (5) in which rubber-lined tubular steel bushes mount track pivot pins (20), the pin ends are usually provided with screwthreaded projection portions so that the steel bushes (10) are motion-free braced relative to each other and relative to the track pivot pins (20) by means of nuts. In order to improve the useful life of the rubber mounting (5) and reduce maintenance, a rubber-lined spreadable bush (10) with at least one dividing gap (11) is proposed instead of the tubular bush. The internal width (25) of the bush (10) which is pressed into position is less than the diameter (27) of the track pivot pin (20). The inserted track pivot pin (20) expands the bush (10) which is pressed into the chain link member (1). In that case the track pivot pin (20) is braced in the bush (10) and is fixed in its longitudinal direction by frictional engagement and in the peripheral direction by frictional engagement and/or positively locking engagement. The screw means for bracing the bushes (10) are eliminated and an increase in the rubber mounting surface is achieved by virtue of using the screwthread space of the screwthread arrangement. That affords an increased service life for the rubber mounting in a maintenance-free design configuration.

Les chenilles à charnières sont munies de paliers en caoutchouc (5) et de coussinets métalliques tubulaires caoutchoutés conçus pour loger des boulons de chenilles (20), dont les extrémités sont généralement pourvues d'embases filetées, de sorte que des écrous maintiennent, avec un certain jeu, les coussinets métalliques (10) les uns contre les autres et contre les boulons de chenilles (20). L'invention a pour objet de remplacer le coussinet tubulaire par un coussinet caoutchouté (10), pouvant être écarté et comportant au moins un joint d'écartement (11), et de permettre ainsi d'allonger la durée d'utilisation des paliers en caoutchouc (5) et de réduire la maintenance. Le diamètre intérieur (25) du coussinet enfoncé (10) est inférieur au diamètre (27) du boulon de chenille (20). Une fois intercalé, le boulon (20) écarte le coussinet (10) enfoncé dans le maillon de chenille (1). Le boulon (20) est alors serré dans le coussinet (10) et fixé longitudinalement par friction et radialement par friction et/ou par liaison de forme. Ainsi, il n'est plus nécessaire d'avoir recours à des vissages pour maintenir les coussinets (10) et l'exploitation de la partie fileté des boulons permet d'augmenter la surface du coussinet en caoutchouc. Il en résulte un allongement de la durée de vie des paliers en caoutchouc et une réduction de la maintenance.

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