Belt-type traction means and method for fabricating the traction means as well as use of said traction means in an elevator and an elevator provided with said traction means

Abstract

The object of the invention is a belt-type traction means, which comprises a herringbone toothed belt (1), which has at least a tooth part (la) and a support structure (2a) supporting the tooth part (la), which support structure (2a) comprises a plurality of reinforcement means (3) in the longitudinal direction of the toothed belt (1). In the transverse direction of the toothed belt (1) the toothed belt (1) comprises two edge parts (2) side by side and a center part (4) between the edge parts (2) connecting the edge parts (2), the spring constant of which center part in the transverse direction of the toothed belt (1) is smaller than the corresponding spring constant of the edge parts (2). In addition, the object of the invention is a method for fabricating the aforementioned traction means (1) and the use of the traction means in an elevator as well as an elevator provided with the aforementioned traction means (1).

Description

technical field [0001] The object of the invention is a belt traction device according to the preamble of claim 1 and a method for manufacturing said traction device according to the preamble of claim 6 and in an elevator according to claim 14 Use of a traction device and an elevator provided with said traction device according to the preamble of claim 15 . Background technique [0002] In known solutions from the prior art, toothed belts are often used as transmissions, i.e. as traction means, for rotating parts of machines and installations, the belts have, for example, spur teeth, helical teeth inclined in one direction, Or so-called herringbone teeth inclined in two opposite directions. When a pulley, which is the drive wheel of a machine or equipment, pulls a toothed belt, at any given time, tooth forces of varying magnitudes are exerted on the meshing teeth of the pulley. The distribution of the tooth forces is determined by the bending of longitudinal reinforcements...

AI Technical Summary

Problems solved by technology

However, in a belt drive with a long belt length, for example, in the use of an elevator using the belt as a traction device, the easily elongated belt causes many problems, so the elongation must be minimized

In this case stiffer reinforcements than normal have to be used, but the problem that arises in these cases is that the profile of the teeth has to be very precise and the alignment of the traction and diverting pulleys has to be very good , because otherwise the difference between the tension in the central part of the belt and the tension applied on the edges becomes too great and the belt will wear out

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