Pile hammer

Abstract

A pile hammer includes a cylinder, a piston displaceably guided in the cylinder, a striker displaceably guided in the cylinder and disposed underneath the piston in the operating position of the pile hammer, a combustion chamber delimited axially by a face surface of the striker that lies in the interior of the cylinder and by a face surface of the piston, as well as a disengagement apparatus by way of which the piston can be moved in the cylinder, into an upper position, wherein the disengagement apparatus includes a carriage, which is connected with at least one cable, by way of which the carriage is guided to be displaceable on the outside, along the cylinder, wherein a stop that projects outward is disposed on the cylinder and a buffer part is disposed on the carriage, with which part the carriage lies against the stop in an upper end position.

Description

technical field [0001] The invention relates to a hammer comprising a cylinder, a piston movably guided in the cylinder, a hammer movably guided in the cylinder (the hammer is arranged on the piston in the working position of the ram). below), the combustion chamber (the combustion chamber is axially bounded by the end face of the hammer inside the cylinder and the end face of the piston) and the separation mechanism (by which the piston can move to the upper position in the cylinder) . Background technique [0002] Such rams, such as diesel hammers (also called diesel pile hammers), are used especially in foundation work in the construction industry for tamping piles of various types, such as concrete piers, steel beams, sheet pile wall elements or the like into the building foundation. During the actuation of such a ram, the piston is pulled upwards in the cylinder by means of a release mechanism and released at a defined height, after which the piston falls downwards un...

AI Technical Summary

Problems solved by technology

[0005] A disadvantage of the previously known ram is that, when the ram is erected from a horizontal position via a crane rope, the outer holding rope encircles the guide rail of the separating mechanism, which is damaged when such a rope is tensioned.

In addition, this can lead to the fact that, under unfavorable positioning of the cables, the main weight of the striker rests on the intermediate cable connected to the disconnecting mechanism, which can result in damage to the disconnecting mechanism

Furthermore, it can lead to damage of the intermediate rope, which is not designed for such loads

Especially with the previously known single-cable maneuvering on the crane side, the central cable arrangement has proven to be problematic, since the tractive force exerted on the separating mechanism via the central cable causes a pivoting of the hammer which has a negative effect on the start of the piling process.

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