IMPACT DRILL Russian patent published in 2013 - IPC B23B45/16 B25D16/00 B25D11/06 F16D23/14 

FIELD: process engineering.

SUBSTANCE: invention relates to percussion-type tools. Proposed rill comprises percussion mechanism, torque transfer element, impact transfer element, connector arranged there between, mode changeover element, retainer, cylindrical tubular case, limiting tube and hooking tenon. Hooking tenon is arranged in offset position at mode changeover element to extend in one phase and retract in another phase at predetermined stroke to and from periphery. Retainer engaged with torque transfer element and can lock its rotation. Said cylindrical tubular case is arranged in offset position relative to rotation centre at mode changeover element. Hooking tenon is arranged in said tubular case. Limiting tube is fitted at mode changeover element. Part of said tube is composed of rounded limiting part. Said limiting part is located at hooking element outer peripheral side at mode switchover element. Said limiting part is located to displace retainer toward disengagement position in one of hooking tenon phases.

EFFECT: ease of use.

16 cl, 16 dwg