Hydraulic unit for industrial trucks

Abstract

The present invention provides a hydraulic unit for industrial trucks, comprising a motor pump unit which is directly attached to a tank, a reflux filter which has an elongate filter casing for a filtering element adapted to be introduced into the tank through an opening, a hose coupling, and an outlet opening, wherein the filtering element is disposed in the flow path between the hose coupling and the outlet opening, a reflux hose between the motor pump unit and the hose coupling, and a closure for the reflux filter, wherein the reflux hose extends within the tank and the hose coupling is disposed within the tank.

Description

technical field [0001] The invention relates to a hydraulic unit for industrial trucks. Background technique [0002] Industrial trucks have a hydraulic unit that uses a load-carrying device to lift cargo. The device consists of a drive motor, most often an electric motor, a pump driven by the electric motor, and a valve. In the simplest case, a slow-acting lift cylinder is actuated by a non-return valve for holding the cargo, while releasing a circuit from the valve to the tank, for example via an openable non-return valve, to lower the cargo. [0003] It is known to combine motors, pumps and valves into units in a common housing and to place the housing directly on a liquid tank from which the pump draws the liquid medium. In addition, it is known not to send the return medium directly to the tank, but to pass it through a return filter during the cargo lowering operation. [0004] Additionally, return filters are known to be constructed such that an elongated filter ca...

AI Technical Summary

Problems solved by technology

Also, known return filters require more individual parts

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