Lifting chain single-ring bending force testing machine

Abstract

The invention discloses a lifting chain single-ring bending force testing machine. The lifting chain single-ring bending force testing machine comprises a chain walking transmission mechanism and a lifting and speed reduction mechanism; the chain walking transmission mechanism includes a chain incoming guide wheel and a chain outgoing guide wheel which are located at two sides of a machine body in a split manner as well as a chain incoming axle wheel assembly and a chain outgoing axle wheel assembly which are arranged on the machine body in a split manner; the chain incoming axle wheel assembly and the chain outgoing axle wheel assembly are both engaged with a centrally-installed pinion in a chain walking driving motor installed at the upper portion of the machine body; a loose pulley is suspended by a double-row chain; a torque sensor is fixed to the lower end of a loose pulley holder; the lifting and speed reduction mechanism includes a chassis, a transmission large gear and a screw rod; the chassis is fixed at the bottom of the platen of the machine body; a stepped hole is formed in the chassis; a central screw hole formed in the large gear is in transmission engagement with the screw rod; a necking section at the upper end of the central screw hole, which extends axially, is limited in the stepped hole; the top end of the screw rod extends out from the necking section and fixes the torque sensor; a guide short shaft fixedly arranged at the bottom end of the screw rod is arranged in the guide hole of a guide fixed plate in a sliding manner; and the transmission large gear is engaged with the output pinion of the output shaft of a lifting motor. The lifting chain single-ring bending force testing machine can test the strength of the double-row chain through bending, pulling and tensioning.

Description

[0001] 【Technical field】 [0002] The invention relates to a single-ring bending force testing machine for a lifting chain, which belongs to the technical field of testing the safety load loading force of finished lifting chains. [0003] 【Background technique】 [0004] The lifting chain is composed of multiple individual chain links (chain links) connected with each other. When the hoist is used in actual working conditions, each link on the chain needs to bear the gravity of the heavy object. At present, the safety of the finished chain is considered. The best method is to use the whole chain on the bar pulling equipment to test the chain before leaving the factory by manpower. The whole chain of a hoist with one specification has a total length as short as 2.5 meters and as long as tens of meters. Therefore, it is impossible to know the links that may have potential safety hazards. In view of the disadvantages of conventional test equipment, how to design a chain-by-link str...

AI Technical Summary

Problems solved by technology

[0004] The lifting chain is composed of multiple individual chain links (chain links) connected with each other. When the hoist is used in actual working conditions, each link on the chain needs to bear the gravity of the heavy object. At present, the safety of the finished chain is considered. The best method is to use the whole chain on the bar pulling equipment to test the chain before leaving the factory by manpower. The whole chain of a hoist with one specification has a total length as short as 2.5 meters and as long as tens of meters. Therefore, it is impossible to know the links that may have potential safety hazards. In view of the disadvantages of conventional test equipment, how to design a chain-by-link strength testing equipment is really a challenge for the chain manufacturing industry. Directions that need to be worked on

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