The outer arm of the elastic arm of the excavator is characterized primarily by:
1. The outer elastic arm consists of an upper sliding arm and a lower fixing arm. The upper sliding arm is mounted above the lower fixing arm. The upper sliding arm is composed of a movable body through two rollers and rails. The elastic cylinder is used to promote the front and rear free elasticity of the upper sliding arm.
2. The upper sliding arm is equipped with an elastic cylinder. The cylinder block of the elastic cylinder is fixed on the base fixing arm, and the piston rod of the elastic cylinder is fixed on the upper sliding arm. Its main components are: fixed body, moving body, slider, elastic cylinder, etc.
External elastic arm has large force, simple structure, can freely adjust the operating radius, adjust the excavation depth, easy to operate and adapt to specific environment. But its journey is small, usually within 4 meters.
The elastic arm of excavator is characterized by:
1. The internal elastic arm is inserted into the fixed body by a moving body, and then extends and retracts the moving body through the elasticity of the elastic cylinder, so as to achieve the purpose of free elasticity.
2. Its structure has only one fixed body and one or more mobile bodies. The first section is fixed body, the rest are mobile body. The mobile body is inserted into the fixed body in order of its size. The principle is that two sections are inserted into one section and three sections are inserted into two sections. The inner elastic arm has a disorderly structure and a high production cost. It is generally designed to be more than two sections for grasping and lifting soil in deep pit operation.
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