Percussive tool for e.g. boring, has motor with drive gear shaft and impact hub with multiple hammer blocks, where polygonal shaft corresponds to transmission shaft and the multiple projections, on which hammer blocks hit

摘要

The tool has a motor with a drive gear shaft and an impact hub with multiple hammer blocks on front surface. The intermediate shaft has an axial polygonal hole and the polygonal shaft of the intermediate shaft fits in the polygonal hole. The intermediate shaft sits in the impact hub and rotates the impact hub. The drive shaft has a polygonal hole at one end. The polygonal shaft corresponds to transmission shaft and the multiple projections, on which the hammer blocks hit. The tool has two planetary gear sets (2,3) with planetary carriers, where the latter planetary gear set engages with the sun wheel and the coupling is connected with the former planetary gear set.