Tunneling vehicle axle with central oscillation
- APPLICATION Tunneling vehicle
- TYPE Steering axle
- MAX PAYLOAD 5 000 kg
- BRAKING Motor or drum brake
- SUSPENSION Central oscillation
- STEERING Hydraulic cylinder
- MOTOR TYPE Poclain type MS
A powered axle with central oscillation for tunnelling vehicles
This version of the Paillard axle for tunnelling vehicles stands out with its integrated motorisation and central oscillation system, engineered for the self-propelled service vehicles operating inside galleries under excavation.
With a maximum load capacity of 5,000 kg, it equips the machines that transport segments, equipment or personnel within railway, road or metro tunnels. Its design combines drive power, ground clearance capability and steering precision, offering tunnel boring machine operators a complete solution capable of moving autonomously across the most degraded surfaces and through the tightest spaces of underground construction sites.
Central oscillation suspension for permanent ground contact
On tunnel boring sites, floors are rarely flat: excavation mud, ruts, debris, occasional level changes and wet sections follow one after another continuously. The central oscillation suspension system allows the axle to pivot around a central axis, ensuring that all four wheels of the vehicle remain in contact with the ground, even when the terrain presents significant irregularities. This feature is essential for a powered axle: it preserves traction, prevents loss of grip and limits wheel slippage.
The result is enhanced stability, improved safety for operators, and optimal transmission of drive power under the most demanding underground conditions.
Poclain MS-type hydraulic motor for autonomous, high-torque traction
The axle integrates a Poclain MS-type hydraulic motor, a recognised reference in the world of heavy industrial equipment. This radial piston motorisation delivers high torque from low speeds, a decisive factor when moving a loaded vehicle over uneven ground, on slopes, or in operating conditions requiring frequent starts and stops.
Combined with a steering axle powered by a hydraulic cylinder, it gives the vehicle full manoeuvring autonomy: it can move forward, reverse and turn in confined spaces without relying on a tow vehicle. This simplifies the logistical organisation of the site and significantly improves the overall productivity of underground operations.
A bespoke axle made in France for tunnelling environments
The braking system, via engine brake or drum brake, is deliberately chosen for its resistance to tunnel conditions: the enclosed drum protects components from dust, water splashes and mud, ensuring reliable braking performance over time.
The entire axle is designed as a bespoke solution in Paillard’s workshops in Vaux-le-Pénil, according to your vehicle specifications: mounting interfaces, dimensions, load capacity, drive and steering configuration. Our design office supports you at every stage, from technical definition to final delivery, drawing on over 100 years of expertise in developing components for the special vehicles used in civil engineering and heavy construction.