DEVICE TO CONTROL PERCUSSION MACHINE WORKING CYCLE BY PRESSURE (VERSIONS) Russian patent published in 2014 - IPC B25D9/04 B25D9/14 

FIELD: process engineering.

SUBSTANCE: invention relates to percussion machines. It comprises body with slide valve, baffle and rod, piston, spring, impact sensor, working fluid flow sensor, working fluid flow exhaust and control channels. Rod is mounted in the baffle central bore to interact with the slide valve. Said working fluid flow sensor and spring are fitted on said rod. Said working fluid flow exhaust channel can communicate via slide valve bores with back stroke chamber and orifice with working fluid source. Said working fluid flow control channel communicates with working fluid source via control unit and orifice. Piston and body front wall inner surface form the working fluid flow control chamber. Permanent magnet is fitted on said rod at body front wall outer surface. Spring is arranged between piston and baffle. Working fluid flow sensor is composed of ferromagnetic element with control coil connected with control unit. In compliance with first version, impact sensor can be fitted on working tool and is connected with control unit while working fluid flow control chamber can be communicated with working fluid flow discharge channel at open slide valve. In compliance with second version, said chamber can be communicated with back stroke chamber at the hammer back stroke end.

EFFECT: automated control, simplified design.

2 cl, 2 dwg