Gear box for use in electrical hand tool device for lubrication of e.g. oil, has lubrication assembly comprising fixed lubricant body that is in mechanical contact with driven transmission part and moved together with transmission part

摘要

The box has a drive transmission part (2) i.e. rotor shaft, and a driven transmission part (4) and a solid material lubricating assembly for lubricating the gear box. The solid material lubrication assembly comprises a fixed lubricant body (5) i.e. lubricant gear wheel, that is in mechanical contact with the driven transmission part and moved together with the driven transmission part during operation of the gear box. The lubricant body contains graphite, molybdenum disulfide or PTFE. The lubricant body is pressed against the driven transmission part.