1, the work unit: movable arm, arm, bucket, cylinder, connecting rod, etc. , which is also called the big arm moving arm, forearm is also called the arm, bucket, also known as digging bucket;
Movable arm is made of high qualified steel plate is made of bent 135 degrees;
200 machine general excavator forearm long 2.
9 m, long 5 big arm.
Excavator from the bucket on the installation of can be divided into two kinds of, shovel and backhoe.
2, rotary device: rotary platform, rotary bearing, slewing mechanism.
Slewing mechanism including designed motor, rotary gear reducer.
3, walking device: guide wheel, driving wheel, chain wheel, roller and track customarily called 'four-wheel area'.