3. Construction & Main Parts
3.1 Inner Valve Type
Through bolt
Back head
Through bolt
Valve
Cylinder
Piston
Front head
Driver chisel/tool
Front head, cylinder and back head of Post driver hammer
body are tightly fixed with four through bolts.
Back head
This contains the cushion chamber charged with nitrogen(N2)
gas that compresses during upward strokes of the piston,
and serves to provide maximum absorption of piston recoil,
efficiency storing this energy for the next blow.
Valve
Cylinder control valve is built in the valve housing and
controls piston reciprocation.
Cylinder
The cylinder is the heart of the Post driver hammer
containing hydraulic circuit for piston reciprocation
Piston
Kinetic energy of the piston is converted into hammering
energy after hitting the tool. The hammering energy
transmitted to the tool breaks rocks
Front head
The front head supports the whole Post driver hammer.
Upper bushing prevents shock from the tool
Driver chisel/tool
This transfers piston impact power to the objects.
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