Concentric DC motor / pump units from jbj Techniques Limited

Concentric AB-Motor Pump-EU-2011-7 2 Concentric DC Pump/Motor Units Typical applications are Truck: Small cranes Double load deck Supplementary steering Support legs Construction: Tilt of hood or cabin Supplementary steering Supplementary braking Support function for lift device Auxillary functions Material Handling: Steer Lift Brake Tilt Aerial Lift: Propel Steer Lift Nivellation of cage The Wheel Loader has an articulated steering where the vehicle is split into front and rear halves which are connected by a vertical hinge. The front and rear halves are connected with two hydraulic cylinders that change the angle between the front and rear end of the vehcile. The steering is hydraulic and depends on the flow generated by the engine driven pump. If the engine stalls and therefore cannot supply flow for the steering a pres- sureswitch activates the pump/motor unit to supply flow for the steering and by this enable a continously safe manouvering. The Pump/Motor units consists of a 12/24/48V DC motor in the range of 1,5 kW to 4,5 kW and a W series gear pump with displacement 0,8 cm 3 to 31 cm 3 /rev. Additionally the units can be equipped with integrated valves and starter solenoids. Concentric Pump/Motor units in difference to He Power packs is not selfcontained and is in many cases integrated into an existing system for auxillary functions, safety fucntions or support funtions. In other applications the Pump/motor unit is the power source in the system for lift, move, propell etc.

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