动力换档变速箱是指与液力变矩器相连而可在不切断动力下换档的变速箱。它有定轴传动和行星传动两种形式,由用液压控制的制动器或离合器进行换档。一、定轴式动力换档变速箱的传动原理定轴式动力换档变速箱由固定轴线的传动轴、外啮合圆柱齿轮、换档离合器、液压控制系统等组成。它具有结构简单、制造容易、便于采用通用的换档离合器等优点,因此在轮式装载机上,至今仍是一种典型结构。国产5米~3轮式装载机的定轴式动力换档 The power shift transmission refers to a transmission that is connected to a torque converter and can be shifted without cutting off power. It has two forms of fixed-shaft drive and planetary drive, which are shifted by hydraulically controlled brakes or clutches. 1. The transmission principle of the fixed-shaft power shift transmission The fixed-shaft power shift transmission consists of a fixed axis drive shaft, an external meshing cylinder gear, a shift clutch, and a hydraulic control system. It has the advantages of simple structure, easy manufacture, and easy adoption of universal shift clutches. Therefore, on the wheel loader, it is still a typical structure. Fixed-shaft power shifting of homemade 5m~3 wheel loaders