Hand chain hoist is a kind of small manual lifting tool

Hand chain hoist is a kind of small manual lifting tool. Safety, light weight and convenient operation is the goal of the chainb lock of the product. To achieve this goal, according to the characteristics of the chain product structure, reasonable design of the gear is especially important. At present, the chain in gear, mainly is the involute spur gears. Reasonable design of this kind of gear is still the focus of the improvement of involute gear tooth profile, because it is the factors affecting the service life of bearing capacity and the use of involute gear is one of the most main factor. From the manual hoist practice and theoretical analysis shows that the reasonable selection of tooth profile Angle, transition radius and addendum higher tooth shape parameters, the comprehensive improve the bearing capacity and service life of the involute gear has a significant effect. According to the tooth profile Angle, selected a reasonable transition radius and the addendum higher combination parameter, manufacture special gear cutting tools, in the gear processing, is still very economic, the chain of low-value products especially for. Therefore, this article through to the different tooth profile Angle, the transition radius and addendum higher gear tooth profile parameters on the performance analysis and comparison, choose the reasonable parameter values and their combination, as a practical design chain drive gear recommended value.