Push-pull chain and actuator

Abstract

A push-pull chain (1) that can bend in one direction only, and is provided with at least two rollers (12,13) on each of the driving pins, one of the rollers (12) engages a drive sprocket (29) and the other of said at least two rollers (13) engages a chain guide surface (28). An actuator (20) for e.g. opening and closing a window that uses this dual-roller push-pull chain. A link (105) driven push-pull chain (101) that can bend in one direction only, with links (105) that is shaped as an engagement surface for engaging a drive sprocket (129). An actuator (120) for e.g. opening and closing a window that uses the link driven push-pull chain.

Description

Push-pull chains and actuators technical field The present invention relates to push-pull chains used in actuators, and in particular to chains that can only bend in one direction. The invention also relates to an actuator comprising such a chain. Background technique DE10206274 discloses a push-pull chain formed from pairs of inner and outer links, wherein alternating pairs of inner links are coupled to alternate pairs of outer links in turn by parallel drive pins with roller sleeves. The ends of the links are provided with faces which abut against such that the chain is prevented from flexing in one direction due to the rotation of the links about their pivots, but allows the chain to flex freely in the other direction. Said faces have shapes complementary to each other so that, when the chain is under pressure, they directly abut against each other preventing bending movements. The chain may be used on an actuator having a chain passage leading to the chain outlet and...

AI Technical Summary

Problems solved by technology

This type of chain is not suitable for use in actuators, but it combines the wear resistance of roller chains with the silent advantages of silent chains

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