General
Rammer Repair
wc_tx000284gb.fm
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2.
General
2.1
Description
Rammers are designed to compact loose soils and gravel to prevent
settling and to provide a firm, solid base for the placement of footings,
concrete slabs, foundations, and other structures.
2.2
Power Transmission
BS 50, BS 60, BS70, BS 65, BS 500, BS 600, BS 700, and BS 650
Rammers are powered by the WACKER WM80 engine. The BS 50-4
and BS 60-4 Rammers are powered by the WACKER WM90 engine.
These gasoline engines are specifically designed for use on WACKER
Rammers.
The DS 720 and DS 70 Rammers are powered by a Yanmar diesel
engine, making it suitable for use in potentially explosive
environments.
The engine crankshaft turns a centrifugal clutch that allows the engine
to be disengaged from the ramming system during engine start-up and
idling.
The engine drives the ramming system through a set of reduction
gears and a connecting rod. The reduction gears and connecting rod
convert the engine’s circular motion (4250-4450 rpm) to the vertical
stroking motion (600-750 blows per minute) of the ramming system.
The gear reduction increases the available power to drive the ramming
system through each stroke. The connecting rod attached to the crank
gear converts the circular rotation of the gears to the up and down
stroking motion of the rammer.
2.3
Spring System
The spring system consists of a piston between two spring sets. The
piston is connected to the ram that is driven by the connecting rod
attached to the crank gear. Plastic bushings on either side of the piston
prevent the springs from bottoming out. The piston and spring sets are
housed in the spring cylinder that slides up and down inside the guide
cylinder.
The spring system has two functions. The spring system’s first function
is to store energy created by the engine and release it to the shoe
during its downward stroke. The spring system’s second function is to
isolate the shock that is created when the ramming shoe hits and
prevent it from being transmitted back to the rammer.
Содержание BS 50-4
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