Press fitting die for escalator chain step chain link

Abstract

The invention discloses a press fitting die for an escalator chain step chain link. The press fitting die comprises a spring base, a first positioning device and a second positioning device. The firstpositioning device is fixed to the spring base and is used for horizontally positioning and supporting a step outer chain plate. An elastic element is arranged on the spring base. The second positioning device is movably connected to the spring base and is elastically supported by the elastic element. A through hole is formed in a shaft body of a step pin shaft in advance. The second positioningdevice is used for vertically positioning and supporting the step pin shaft and making the axis of the through hole and the axis, in the length direction, of the step outer chain plate keep the presetparallelism. The pressure connecting end of the upper side of the step pin shaft is higher than the second positioning device, and the pressure connecting end of the lower side of the step pin shaftis located above a plate hole. A pressure machine exerts force to downwards press the pressure connecting ends. The step pin shaft and the second positioning device are synchronously limited to move downwards. The pressing fitting ends are aligned with the plate hole to be subjected to integrated press fitting. By means of the press fitting die, the parallel precision of a press fitting step pin shaft hole and the chain plate is effectively improved, and the product quality is improved and stabilized.

Description

technical field [0001] The invention relates to the technical field of chain press-fitting dies, in particular to a press-fitting die for step chain links of an escalator chain. Background technique [0002] Escalator chains are widely used in escalators for lifting or conveying. The step chain link can be divided into a step pin structure with a hole and a structure without a hole. For the structure with holes, it is necessary to ensure that the axis of the step pin hole is parallel to the axis of the step outer chain plate in the length direction. Usually, for the press-fitting of the structure with holes, firstly, a mandrel is manually passed through the step pin shaft, and then the mandrel is manually taken out to realize the positioning of the step pin shaft, and then the press-fitting is carried out by a hydraulic press. Due to manual removal of the mandrel, the labor intensity is high, and the step pin shaft will have a certain impact when it is taken out, the preci...

AI Technical Summary

Problems solved by technology

Due to manual removal of the mandrel, the labor intensity is high, and the step pin shaft will have a certain impact when it is taken out, the precision of the pressed product is poor, and the mandrel is long, and it is easy to bend during long-term pressing, which will also reduce the press-fitting accuracy.

Images