#Komatsu

Construction Machinery Engineering September 7, 2026

Hydraulic Excavators — Understanding Boom, Arm, and Planetary Gears Through Sensors and Equations

A hydraulic excavator is a mobile robot that distributes the rotation of a diesel engine to hydraulic pumps, cylinders, and reduction gears. This article diagrams the kinematics of the boom, arm, and bucket, bucket-edge estimation via IMU, the planetary gears in the upper structure and undercarriage, current ICT/electrification efforts from Komatsu and Caterpillar, and ongoing research into autonomous excavation.

Fundamentals · 9 min Construction Machinery Engineering September 4, 2026

Wheel Loader 101 — The Mechanics of Articulated Steering and the Bucket Linkage

A wheel loader scoops earth using a combination of articulated steering, where the body itself bends in the middle, and a bucket driven by a Z-bar or parallel linkage. This article organizes the steering kinematics, the breakout force produced by the linkage, and the division of roles versus the hydraulic excavator and bulldozer, alongside Komatsu's current WA series.

Fundamentals · 7 min Corporate Research July 18, 2026

Corporate Research: Construction Machinery — Komatsu vs. Hitachi Construction Machinery

Japan's

Industry research · 10 min