| 摘要 |
The invention relates to belt cylinders, i.e. piston rodless operating cylinders in which steel belts, in particular, are used in transferring force; even during production, belts of this kind have the negative property of not being sufficiently straight, instead they are bow shaped and this leads to break downs in that the belts either destroy the flanges on the deflecting rollers in a very short time or, if there are no flanges, they run off the rollers; for this reason despite the technical advantages, belt cylinders have not been successful in practice. A satisfactory operation of these belt cylinders may be achieved if, and only if, the belts which transfer force from the piston to the force pick-up are in absolute alignment. In order to achieve this, the invention provides that the piston-belt-force pick-up-piston system be preloaded, and that the ends of the belt be secured pivotably in a turnbuckle, so that they may automatically align themselves; moreover, the relationships between diameter, deflecting rollers and belt dimensions are optimized according to the driving force, from the point of view of fatigue strength.
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