DOLL Fahrzeugbau used bauma 2025 to showcase its latest innovations in trailer technology, including a three-axle low-bed-trailer with pendular axles, a three-unit wind blade transport system, plus a semi-trailer engineered for military operations in challenging terrain.
The three-axle lowbed with ‘DOLL tera’ pendular axle technology is suitable for applications that require maximum ground clearance. With an axle stroke of up to 600 mm, the driver can raise the loading platform to compensate for uneven terrain and different heights. At the same time, the pendular axle balances out uneven ground and keeps the vehicle level.
Additionally, the loading height can be adjusted to the cargo to ensure compliance with the vehicle’s total permissible height. A steering angle of up to 60 degrees facilitates manoeuvring in the tightest spaces. “When transporting heavy and oversized components or machines, every centimetre counts,” said Mathias Neumayer, product manager for heavy haulage at DOLL. “For example, when loading an excavator, it is crucial that the arm can be set down completely and as low as possible on the loading area. For this purpose, our rear axle chassis accommodates an excavator recess with a width of 900 mm and a depth of 550 mm.”
The latest wind blade transport system comprises a jeep dolly, a lifting adapter and four-axle self-steering dolly trailer. The trailer features the hydraulic steering system developed by DOLL and is equipped with a concrete bolster that allows tilt adjustment of up to 85 degrees to the left and right. The axles also improve manoeuvrability with a steering angle of up to 55 degrees. Moreover, an intelligent sensor system precisely monitors the steering angle and issues an early warning before the steering reaches its maximum limit. Moreover, a smart battery charging system ensures that the trailing unit remains operational and steerable, even in emergency situations.
DOLL said that despite its low weight, the trailing device is designed for rotor blades with a length of up to 120 m and a weight of up to 32 tonnes. It is approved for use with all common wind blade manufacturers.
Finally, it displayed a four-axle semi-trailer with ‘DOLL panther’ independent wheel suspension, which is designed for the transport of tracked and wheeled military vehicles. With a payload of up to 40 tonnes, it enables the safe transportation of heavy equipment – even in rough terrain and on unpaved forest and field roads. “It can also be individually customised – with a rigid, hinged, or compensating gooseneck, as well as hydraulically or mechanically operated single or split ramps. Even the length of the loading bed can also be customised to accommodate different cargo,” said Neumayer.
