초록 ▼

The asphalt laying machine comprises a rear body divided into sections with smoothing and compacting units suspended through vibration dampers in the frame. Each unit comprises an intermediate part and a smoothing part interconnected by means of a rear shaft bearing and a front connecting rod connec

The asphalt laying machine comprises a rear body divided into sections with smoothing and compacting units suspended through vibration dampers in the frame. Each unit comprises an intermediate part and a smoothing part interconnected by means of a rear shaft bearing and a front connecting rod connected to an eccentric. By virtue of this interconnection an elliptical movement is transferred to the smoothing part during operation of the machine, and this movement produces a heavy tamping at the front edge, a smoothing and vibrating effect at the intermediate area of the ironing plate, and a succeeding tamping and polishing effect at the rear edge area. The tamping foot of a scraper plate suspended on the intermediate part tamps laid asphalt synchronously in opposition to the tamping plate of the ironing plate by virtue of reaction forces transferred through the intermediate part. During the operation of the machine, the smoothing and compacting unit ensures an unusually densely compacted and uniform surface of the asphalt.

대표청구항 ▼

An asphalt laying machine with a rear body preferably divided into screed sections, each section comprising at least one smoothing and compacting unit comprising a bracket fixedly connected to a carrier frame, an intermediate part connected to said bracket by means of vibration dampers in order to r

An asphalt laying machine with a rear body preferably divided into screed sections, each section comprising at least one smoothing and compacting unit comprising a bracket fixedly connected to a carrier frame, an intermediate part connected to said bracket by means of vibration dampers in order to reduce transfer of vibrations to the frame, and a smoothing part having a lower rear edge and a lower front edge located under said intermediate part, said smoothing part a short distance in front of and above its lower rear edge at the rearward point being hinged to said intermediate part for limited rotational movement about this hinge, and said smoothing part at its front edge being hinged to said intermediate part by means of a moving mechanism, which includes at least one upwardly directed connecting rod and an eccentric drive therewith for providing limited elliptical movement of said moving part in relation to a surface to be smoothed, in such a manner that essentially all individual points of the smoothing part relative to an upper carrier frame are reliably moved and guided along elliptical paths having short elliptical axes, whereby these axes are preferably shorter at the rear edge of the smoothing part than at its lower front edge, whereas essentially all individually points of the intermediate part in response to the movement of the smoothing part may be moved either synchronously in phase opposition along corresponding elliptical paths or only forward and backward along a substantially horizontal displacement path.