Multi-operating condition chain tensioning device

Abstract

The invention discloses a multi-operating condition chain tensioning device which aims at overcoming the defects that the chain tensioning device in the prior art needs manual adjustment or the original tensioned edge of the chain in transmission can not be tensioned when changed to the loosening edge during braking and adopting a pressing block to press a chain plate can result in fast abrasion, and provides a tensioning device capable of keeping a chain tensioned under various operating conditions. The multi-operating condition chain tensioning device comprises a pair of brackets and a roller device, wherein the brackets are arranged on a stander and are provided with guide grooves, and the roller device is arranged on the brackets for pressing a chain; and two ends of a roller fulcrum shaft are symmetrically and fixedly provided with two sawtoothed discs which have the outer edge contour gradually extending outwards and are provided with elastic jacking devices which can drive the sawtoothed discs to rotate so as to enable saw teeth to support the edge of a support, and the support is fixedly connected with the stander on which an elastic lifting device capable of being pressed below the roller fulcrum shaft to jack the fulcrum shaft together with the roller to the chain. The multi-operating condition chain tensioning device can keep the chain tensioned all the time under the operating condition of normal transmission or braking, and can reduce the abrasion of the chain by using the roller to jack the chain.

Description

technical field [0001] The invention belongs to the field of chain transmission, and in particular relates to a chain tensioning device, in particular to a chain tensioning device for chain transmission under braking conditions. Background technique [0002] Chain transmission devices are widely used in mechanical structures. Chain transmission has some characteristics of both gear transmission and belt transmission. The capacity is large, especially the center distance can be large and the structure is light; compared with the belt drive, the average transmission ratio of the chain drive is accurate, and the transmission efficiency is high, especially the pulling force of the chain on the shaft is small. However, the reliability of the chain transmission device is greatly affected by the tightness of the chain. Common chain tensioning devices include manual regular tensioning and automatic tensioning; some tensioning methods use a pressure plate to press the chain. A better...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the chain tensioning device in the prior art which requires manual frequent adjustment or when the chain drive is in braking state, the tension cannot be obtained when the original tight side is converted into a loose side, and the pressure block is used to press the chain. The sliding friction of the plate will accelerate the wear of the chain plate, and provide a chain tensioning device that can keep the chain in a tensioned state under various working conditions and is wear-resistant

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