PILE DRIVING HAMMER Russian patent published in 2007 - IPC E21C37/00 E02D7/08 

FIELD: percussion equipment for mining, construction and other industries.

SUBSTANCE: pile driving hammer comprises body and cylindrical striker slidably arranged in the body and connected to lower end of pulling tool. The striker has striker position sensors. Pile driving hammer also has compression chamber, anvil block, driving mechanism including drive with half-coupling connected to the drive, change speed gearbox, main gear, braking mechanism and control systems, which operates braking mechanism and pile driving hammer. Braking mechanism consists of braking hydraulic cylinder, inner and outer braking drums connected with each other by means of brake linings. Driving mechanism is provided with cardan shaft connected with gearbox and having differential gear and driving half-axles. Movably put on each driving half-axle is slidable hollow bush with inner braking drum arranged from the side of outer braking drum and with driving shaft having gear-wheels located from sides thereof. Gear wheel is put on central part of slidable hollow bush between bearing assemblies. The gear wheel is connected to drive shaft gear wheel having greater number of teeth. Vacuum chamber is located in lower body part under cylindrical striker. Pulling tool is of band type and fastened to central part of driving shaft. Slidable hollow bush with braking drum is connected to hammer and to driving motor or combustion engine control system through braking hydraulic system and flexible hydraulic hose. Driving mechanism body is provided with cantledge.

EFFECT: increased efficiency.

3 cl, 1 dwg