Truck & Off-Highway Engineering - August 2022 - 9

TECHNICAL INNOVATIONS
Rexroth's eLION line of spur gearboxes
for use with electric motors will enter
production in 2022.
POSITIONED FOR
PRODUCTIVITY.
we're also helping our customers to strengthen their market
position with future-viable mobile working machines. "
Also entering production in 2022 as part of Rexroth's eLION
platform is a line of spur gearboxes for use with electric motors.
The one- and two-speed gearboxes are installed in the central
section of the machine and can drive up to two axles with just
one motor. The 1-speed spur gearbox (eGFZ 9100) and the
2-speed shift gearbox (eGFZ 9200) can connect or disconnect
an axle for two- or all-wheel drive applications. A lockable center
differential is also available for permanent all-wheel drive.
The gearboxes can be installed horizontally or vertically depending
on the packaging requirements. Rexroth states that
components such as the heat exchanger and oil pump enable
both gearboxes to be seamlessly integrated into the existing
cooling circuit of an electric driveline. Both gearboxes are
equipped with DIN ISO-compliant flanges.
Electronically controlled hydraulics
Hydraulics continue to be an important portion of Rexroth's
product portfolio. One of the latest offerings is its open circuit
hydraulic architecture that controls hydromechanical functions
via software instead of pressure, torque or the swivel
angle. The central component behind this system is the eOC
pump, which features a swivel angle sensor and pressure sensors
to ensure the proper control of the necessary setpoint
values for torque, pressure or flow.
The pump reportedly provides millisecond-level accuracy to
modulate the pressure in combination with the eOC software.
Characteristics such as dynamics and power control can be set,
changed and combined via the software for machine optimization
and makes it possible to set various control parameters flexibly
during operation. Rexroth states that moving hydromechanical
control functions to the software means control modes can
be individually changed and combined during operation and the
pump dynamics can be set variably.
Pressure, torque, flow and the swivel angle are all controlled
independently of each other in this system, which means the
pump behaves optimally regardless of function. Setpoint values
and parameters can reportedly be adjusted via the CAN bus interface
to allow additional functions and to adapt machines to
meet specific customer requirements and specific tasks. The
eOC software constantly adapts the hydraulic power to the available
engine torque, which Rexroth claims will increase the overall
TRUCK & OFF-HIGHWAY ENGINEERING
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August 2022 9
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Truck & Off-Highway Engineering - August 2022

Table of Contents for the Digital Edition of Truck & Off-Highway Engineering - August 2022