| 主权项 |
1. An optimized pneumatic hammer characterized by the maximum kinetic energy of its tool and by the ability of working in a regular mode of operation during which said tool interacts with the target media or in a retracting mode of operation during which said tool is released from being jammed by the media and comprising:
a tubular housing assembly including a tubular housing that accommodates the basic assemblies and components of said optimized pneumatic hammer, a rigidly attached to the lateral surface of said tubular housing longitudinal structural shape creating a longitudinal air passage allowing the compressed air to communicate between the rear and front ends of said tubular housing, and means for handling said optimized pneumatic hammer by an operator or mechanical arm; an air control valve chest assembly including an air control valve chest rigidly secured into the rear end of said tubular housing and having air passages allowing the compressed air that is needed for the operation of said optimized hammer to flow into said tubular housing and to escape to the atmosphere, a double stepped air control valve that cyclically reciprocates inside of said air control valve chest directing the flows of the compressed air causing the operation of said optimized pneumatic hammer; a tool holder assembly including a tool holder housing rigidly secured to the front end of said tubular housing, a leading bushing accommodated by said tool holder housing, a tool movably inserted into said leading bushing, a spring holding sleeve securely attached to said tool holder housing, and a coil spring accommodated by said spring holding sleeve enabling said coil spring to push constantly said tool toward the rear of said tubular housing; a striker assembly that under the pressure of the compressed air forces is cyclically reciprocating inside of said tubular hosing and including a striker, a pair of bushings on both ends of said striker which cyclically imparts heavy blows to said tool during the regular mode of operation or to the front part of said air control valve chest during the retracting mode of operation; a compressed air flow splitter assembly including a splitter rigidly attached to the rear end of said air control valve chest, an air pressure regulator securely connected to said splitter that is connected with the source of compressed air for receiving a flow of compressed air at the nominal (high) pressure and splitting this flow into two lines of which one line representing the nominal (high) pressure line is directly connected with certain passages of said air control valve chest and said double step air control valve and is supplying compressed air for performing the forward stroke of said striker assembly while the other line is connected with said air pressure regulator that reduces the air pressure to the required level creating the reduced (low) pressure line that is connected with other passages of said air control valve chest and said double stepped air control valve and is supplying compressed air for performing the backward stroke of said striker assembly; an exhaust valve assembly including an exhaust valve chest which is rigidly secured to the lateral surface of said tubular housing and having passages to communicate with the atmosphere and with the internal spaces of said tubular housing, and an exhaust valve that cyclically reciprocates inside said exhaust valve chest for opening exhaust passages to the atmosphere at the end of the forward stroke and to keep these passages closed during the backward stroke of said striker assembly. |
