A ripper is a passive traction working device used for breaking and loosening soil. It is mainly divided into two types: Excavator rippers (bucket hooks) and bulldozer rippers (tail hooks), suitable for engineering scenarios such as hard soil, weathered stone, and asphalt pavement. Its main body consists of a main plate, lug plates, and bucket teeth. It comes in two types: a four-bar linkage structure with a non-adjustable loosening angle and a four-bar linkage structure with an adjustable loosening angle. The latter uses a tilting hydraulic cylinder to adjust the loosening angle to adapt to different working conditions. The tooth tips use hard alloy tooth caps, and the material is mostly Q345B steel, with some key components using high-strength alloy steel to improve durability.
This device uses a hydraulic cylinder to forcefully insert and turn the soil. During operation, the traction force of the main machine presses the loosening teeth down to a predetermined depth for breaking. Design parameters include rated traction force, mass percentage (9% of the total machine weight), and loosening angle (angle above 20°). The design of the support angle parameters relies on empirical analogy and finite element analysis. The problem of easy cracking of crossbeam welds needs to be addressed through process improvements such as pre-weld grinding, preheating, and post-weld heat treatment (200℃ for 30 minutes). After the improvements, zero compensation for structural components can be achieved.
