Gearboxes for electric vehicles

As a system partner for electric drive solutions, ARADEX AG's portfolio also includes gearboxes in addition to our power electronics and all other components of the powertrain. To this end, we carry out a successful cooperation with a German gearbox partner and can flexibly adapt the appropriate gearbox for you to a wide range of applications and ultimately optimally integrate it into your drive system. For our customers, this means:

  • All components are developed and manufactured by selected manufacturers within their respective core competence
  • All drive components can be obtained from ARADEX from a single source, which means that coordination and compatibility problems can be averted

We are also pleased to equip your drive system with the gear-specific gearbox.
We look forward to your inquiry!

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More information

The following transmission types are available from ARADEX

Planetary gear

Planetary transmissions are gearboxes which have revolving axles on the circular paths in the frame and in which the drive and output shafts are aligned with one another or are arranged in a straight line with one another.

A planetary gear has at least two shafts, a rotating axis and is two-stage.

The compact design, which is characterized by a small volume and coaxial shafts, is a major advantage of the planetary gear. Likewise, the transmission of high torques can be realized with the aid of planetary gear units.

Planetary gearboxes, which are available through ARADEX, have a high level of stability, are simple to assemble, have ground external teeth, a sturdy housing and usually have four or five planetary gears.

In addition to the use in transfer cases (with switchable support) in all-wheel drive, planetary gears are mainly used in the drive hubs of buses and trucks as well as in the starter.

Spur gears

The spur gear unit has front or toothed wheels arranged on parallel axes. In the simplest form, the spur gear system consists of two shafts, on each of which a gearwheel is arranged. Multi-speed transmissions can be mapped by additional gears and intermediate shafts.

A significant advantage is the comparatively simple design with only a few moving parts, which gives the spur gear transmissions a high degree of robustness. External toothed gears provide a direct transmission, which makes the transmission efficient.

A disadvantage is the higher dead weight compared to planetary gears.

Helical gearboxes, supplied by ARADEX, are suitable for applications with high speeds, power ratings up to 1000 kW, can be combined with planetary stages and can be connected with the feeder shaft or directly to the motor.

Summing gear

Summing gearboxes are capable of compiling the revolutions of two motors. In the case of a hybrid vehicle, the electric and the internal combustion engine. It is also possible to use a summing gear for the interconnection of two or more motors. At full load and high acceleration, the drive control then switches to the engine mode to assist the internal combustion engine.

In this way, the motor can be made smaller and lighter, whereby a cost advantage can result. Compared to applications with motors which provide high power at constant speed, a speed change can be achieved at the output with a smaller motor, the speed of which can be regulated relatively easily and a summing gear.

In addition to hybrid vehicles from the construction machinery and commercial vehicles sector, aircraft construction also represents a field of application for summation gearboxes, since the fuel pump is often driven by two electric motors for safety reasons.

Transfer gear

In the case of distributor transmissions, the input torque is divided into several output drives. In this way, different rotational speeds of the driven wheels can be compensated for. When using a transfer case, more than one axis can be driven.

Transfer boxes are frequently used in all-wheel drive vehicles or multi-axle trucks and distribute the torque generated by the engine and translated by the vehicle transmission to the driven axles. In the case of a differential-controlled all-wheel drive, the force is distributed by a differential or a planetary gear on two drive shafts.