Special Vehicle: JUNGHEINRICH EJQ

The Jungheinrich EJQ 325 is nominated in the IFOY category ‘Special Vehicle’. Jungheinrich developed the EJQ 325, a tailored vehicle for picking up and moving ICE wheel sets, for the Deutsche Bahn (DB) rail company in Dortmund. The solution comprises standard components mainly produced in-house by Jungheinrich. The 2.8kW drive motors are already used in the ‘Junior’ segment, for example, and the tiller is fitted to existing electric lift trucks.

The main problem for DB is the limited amount of available space. The aisle width in which the wheel sets with a length of 2.4 metres are handled is only 2.9 metres wide, and there are also various obstacles in the aisle. This means precision manoeuvring is not only desirable but an absolute necessity. In order to achieve this goal, the tailored Jungheinrich solution is equipped with four different drive modes: straight ahead, transverse, circle and light diagonal. The modes are selected and shown via a display on the control unit.

The various drive modes guarantee maximum agility. There are two buttons on the tiller (one for left-hand and one for right-hand operation) for exact positioning on the final millimetres during transverse travel. As soon as the buttons are pressed, only one of the two drive units is active.

The operator has two control consoles at his disposal when operating the EJQ 325, so that he can always choose the position that offers the best view of the load and the surrounding area. The operating functions are proportional and responsive, although a very short delay in mast function control is noticeable with the second control console.

When the EJQ 325 has been driven to the correct position, the mast is extended. This is a relatively slow process due to the specific load parameters of the DB task. It takes around 40 seconds for the mast to become fully extended. This process stops automatically as soon as there is any risk of tilting. The mast can then only be pushed out further at reduced speed after the supports have been positioned via the tiller.

The truck smoothly lifts wheel sets with a maximum weight of 2.5 tons and a load centre of 1,000 mm up to the desired lifting height (max. 550 mm). For this purpose, Jungheinrich uses two synchronously operating hydraulic motors. To ensure safe and precise positioning, the truck is also fitted with a side shift with a range of up to 700 mm and an integrated fork spreader.

The use of standard components makes for easy and convenient operation of the EJQ. The desired drive mode is selected by pushbutton. Switching between the different modes is relatively time-consuming, but this does not constitute a disadvantage in a precision truck like the EJQ.

 What characterizes this truck overall is that the use of proven standard components creates a ‘whole’ that is more than the sum of its parts, concludes the test team.

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