KAMAZ has patented a leading portal axle with electric drive. The development is intended for heavy wheeled vehicles – dump trucks, off-road vehicles, and special chassis.
Bearing housings are located on the sides of the connecting beam. Each of them contains a drive electric motor, which transmits force to the wheel hub through a two-stage gearbox. A distinctive feature is that the electric motor shaft is shifted downwards relative to the wheel axis. The connecting beam itself is located even lower than the shaft. This increases ground clearance and improves off-road capability.
The gearbox is made according to a non-coaxial scheme. The axes of the gears of the first stage are installed at one end in the bearing housing, and at the other end in the removable cover of the gearbox. This design simplifies the assembly and disassembly of the unit during repair. A radial protrusion is provided on the gear axes, which enters the groove of the bearing housing and fixes the axis from rotation.
The technical result is an increase in the reliability and maintainability of the portal axle. The removable cover and axis fixation simplify access to internal components, and the shifted shaft and beam improve suspension geometry.
The patent has been obtained. The development can be used in new models of KAMAZ electric heavy trucks and in special off-road vehicles.
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