Impacting pickaxe

Abstract

The invention discloses an impact pickaxe with a power unit, belonging to the technical field of power tools, which is characterized in that the lower part of the impact pickaxe is sleeved with a pickaxe cylinder through a pin and a slotted hole, a vibration damping spring is arranged between the pickaxe and the pickaxe cylinder, a pickaxe hammer is arranged in the pickaxe cylinder, the hammer handle of the pickaxe hammer is connected with the output shaft of a reducing device through a keyway and a steel ball arranged in the keyway, an impact spring is connected between the pickaxe hammer and the pickaxe cylinder through a thrust bearing, the hammer head of the pickaxe hammer is shelled with an impact sleeve which is fixed in the pickaxe cylinder, a ball race which can enable the pickaxe to do reciprocating movement is arranged between the impact sleeve and the hammer head of the pickaxe hammer, a steel ball is arranged in the ball race, and the top of the pickaxe bar passes the impact sleeve and is arranged on the bottom of the pickaxe hammer. The impact pickaxe with the power unit has the advantages of reducing the recoil vibration of the impact pickaxe, improving the operation comfort, extending the service life of machine members, lowering manufacturing and maintenance costs, and reducing energy consumption; the impact pickaxe is mainly used in the crushing of concrete, rock, asphalt, and the tamping of rail ballast.

Description

technical field [0001] The invention relates to the technical field of power tools, in particular to an impact pick driven by an internal combustion engine or an electric motor. Background technique [0002] There is a known impact pick driven by an internal combustion engine at present. Its main structural principle is: the output shaft of the internal combustion engine is connected with a gear reduction mechanism, and the gear reduction mechanism converts the rotary motion into a reciprocating motion through the crankshaft linkage mechanism. One end of the connecting rod Connected to the crankshaft, the other end drives the impact piston in the guide sleeve to reciprocate through the piston pin and the pressure piston, and the reciprocating impact piston strikes the pick brazing installed in the pick head to make the pick brazing generate impact energy. However, due to the internal combustion engine, deceleration Mechanism, crankshaft-connecting rod mechanism, and air comp...

AI Technical Summary

Problems solved by technology

[0002] There is a known impact pick driven by an internal combustion engine at present. Its main structural principle is: the output shaft of the internal combustion engine is connected with a gear reduction mechanism, and the gear reduction mechanism converts the rotary motion into a reciprocating motion through the crankshaft linkage mechanism. One end of the connecting rod Connected to the crankshaft, the other end drives the impact piston in the guide sleeve to reciprocate through the piston pin and the pressure piston, and the reciprocating impact piston strikes the pick brazing installed in the pick head to make the pick brazing generate impact energy. However, due to the internal combustion engine, deceleration Mechanism, crankshaft-connecting rod mechanism, and air compressor piston are rigidly connected, and the recoil force generated by the impact piston is transmitted back through the compressed gas, causing the whole machine to generate strong recoil vibration. The vibration force of the operator holding the machine is very large, and the machine is easy to damage

When the crankshaft connecting rod, compressed air piston and impact piston of the impact pick work, they slide at high speed with load, the frictional resistance is large, and the precision of the parts is high, so lubricating oil and grease must be used for joint lubrication. The crankshaft connecting rod, compressed air piston and impact piston are easy to Due to heat damage due to poor lubrication, the impact pick has high manufacturing and maintenance costs

In addition, the energy utilization rate of the impact pick is not high, because the compressed air piston has an empty stroke when it goes up, and does not do work, only when the compressed air piston goes down.

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