Demag Mobile Cranes Gmbh & Co., Kg

Demag Mobile Cranes Gmbh

Ingo N&ouml;ske

Werner Rutz

An undercarriage for a track vehicle includes an endless track having links of constant length connected end to end in the direction of travel, each link having a pair of spaced-apart guide webs and a cog which connects the webs, the cogs being of substantially identical size. The drive sprocket wheel has at least two circumferential sections with teeth having spaces therebetween for engaging cogs. The tooth pitch in each section decreases in the direction of travel from a maximum valve to a minimum value, the space between teeth having the minimum value being sufficient to accommodate one of the cogs with clearance.

Drive sprocket wheel for a track vehicle

A guide for a multi-link endless chain of a track-type undercarriage, especially for cranes, has an undercarriage support, at least one drive sprocket wheel provided with chain teeth, possibly an idler, and several track rollers. Each chain link of the endless chain has two guide webs which are symmetric to the center, spaced a certain distance apart, and extend in the travel direction. The webs have engaging surfaces which ride on opposed circumferential flanges on the drive sprocket wheel. A cog connects the two webs below the engaging surfaces and meshes with the chain teeth of the drive sprocket wheel. The guide has two parallel rails oriented in the travel direction of the endless chain, the inside surfaces of the rails coming to rest against the outside surfaces of the associated guide webs when the guide function is occurring. The guide is a compact pivoting part which is installed immediately in front of or behind the drive sprocket wheel, mounted in a frame part of the undercarriage support, and has two elongated web plates to serve as rails. When the pivoting part is in its working position, the rails are at least level with of the upper area of the guide webs of the individual chain links.

Guide for an endless chain of a track-type undercarriage

A drive sprocket for an endless chain on a track-type undercarriage includes a toothed wheel having a plurality of circumferential teeth extending from a root circle. A pair of mounting rings fixed to opposite axial sides of the wheel support a respective pair of rotating rings by means of bearings, each rotating ring forming a tread having a diameter which is small than the diameter of the root circle. The endless chain has a plurality of links connected end-to-end, each link having a pair of spaced apart guide webs extending in the direction of travel and connected by a cog which engages between two adjacent teeth on the toothed wheel, each guide web being profiled to ride on one of the treads.

Growing community of inventors

Zweibrücken, Germany

Ingo Nöske

Growing community of inventors

Zweibrücken, Germany

Ingo N&ouml;ske

Ingo Nöske