TRACTION-MECHANISM DRIVE

Abstract

A traction-mechanism drive is provided including a drive crankshaft and a traction-mechanism wheel, especially a belt or chain wheel, located on the crankshaft. At least one other shaft is integrated into the drive via a traction-mechanism wheel, especially a belt or chain wheel, and also a traction mechanism, especially a belt or chain, is guided over the traction-mechanism wheels. One of the traction-mechanism wheels (7), which is integrated into the drive (1) to compensate for first-order spurious vibrations introduced into the drive (1) via one of the shafts (6), is round and arranged eccentric (e) to the shaft rotational axis (MW).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

Additional advantages, features, and details of the invention emerge from the following description of a preferred embodiment. Shown are:

FIG. 1 is a block diagram of a traction-mechanism drive according to the invention, and

FIGS. 2 and 3 are two diagrams, which show the tensile force versus the rotation of the crankshaft for the loose-section side and the tensed-section side, as a comparison between a centered wheel and an eccentric wheel.

Claims

1. Traction-mechanism drive comprising a drive crankshaft having a traction-mechanism wheel attached thereto, at least one additional shaft integrated into the drive via a second traction-mechanism wheel mounted thereon, and a traction mechanism guided over the traction-mechanism wheels, at least one of the traction-mechanism wheels, which compensates for first-order spurious vibrations introduced into the drive via one of the shafts, is round and arranged eccentric to a rotation axis of the shaft upon which it is mounted.

2. Traction-mechanism drive according to claim 1, wherein the shaft that introduces the spurious vibration is a balance shaft.

3. Traction-mechanism drive according to claim 2, wherein the second traction-mechanism wheel located on the balance shaft is arranged eccentric to the rotational axis of the balance shaft.

4. Traction-mechanism drive according to claim 1, wherein an angular position of the eccentrically mounted traction-mechanism wheel is selected as a function of a position of the crankshaft.

5. Traction-mechanism drive according to claim 1, wherein the traction mechanism wheels comprise a belt or chain wheel, and the traction mechanism comprises a belt or a chain.