R-Soil Protect

Hydraulic chassis system - roll stabilisation with load compensation, patented

ROPA has developed an innovative chassis concept with an oscillating front axle in conjunction with two hydraulically supported rear axles specially for the flagship Tiger. Compared to the chassis on previous 3-axle beet harvesters (with the central axle fixed to the frame), this reduces the sway of machine by one third! The reason for the improvement is the hydraulic connection of the cylinders at the front and rear axles on one side, so unevenness at one wheel at a different level only affects the frame by 33 per cent compared to the previous system. Thanks to the reduction of the chassis swing, the row and depth control are improved simultaneously, as the frame is averaged to the position of three axles. The hydraulic connection of the axles always distributes the load equally over all 6 wheels.

The hydraulic chassis system minimizes tyres load and ground pressure, thus ensuring further reduction of tyre inflation pressure.

Animation shows Tiger 5, chassis identical to Tiger 6S.

ROPA R-Soil Protect

- Significantly improved soil protection due to tyre pressure reduced by 1 bar in comparison with euro-Tiger V8-4 - unique for harvesting root crops
- 49% greater tyre contact area, 33% lower contact pressure with the IF1000/55 R32 CerexBib
- Significant reduction of load peaks by load transfer:
   by 8 % less on the first axle, 37 % less on the second axle, 43 % less on the third axle
- Equal load distribution on all wheels by networked hydraulics
- On the slope, the load and the gravity center of the slope bottom side are shifted to the slope top side
- Cleaning elements are guided horizontally even on slopes, providing perfect cleaning performance
- Soil-protective sugar beet harvesting also on the side slope without additional tyres inflation pressure increase
- Maintaining and protection of soil structure, ensuring infiltration capacity and air exchange

Summary: Resources and Soil Protection for Efficient Land Management

Soil-protective hydraulic chassis system with Ultraflex tyre technology

Low tyre inflation pressure for sustainable land management

ROPA R-Soil Protect is the combination of a soil-protective, hydraulic chassis system with MICHELIN CerexBib tyre technology.This soil protection concept was awarded a silver medal at Agritechnica in Hanover. It only requires 1.4 bar tyre pressure and it is available as an option in the Tiger 6S. The synergy of the load-balancing hydraulic chassis with the new generation of MICHELIN IF1000/55 R32 CerexBib tyres offers even more contact surface with sustained soil protection and significantly reduced contact pressure.

Increased soil protection with significantly reduced load peaks

The chassis of the Tiger 6 reduces the load peaks by

- 8% on the 1st axle

- 37 % on the 2nd axle

- 43 % on the 3rd axle

Hydraulic chassis system

Slope compensation up to 10%

The automatic slope compensation via six hydraulic cylinders and sensors is also unique among 3-axle sugar beet harvesters. The chassis is kept completely horizontal for up to 10 percent side slope. The gravity centre and, thus, the load of the wheels on the slope bottom side are shifted to the slope top side.

Centre of gravity and soil pressure compensation

The track depth of the wheels on the slope bottom side is substantially reduced, the infiltration capacity is retained, thus significantly reducing erosion risk during heavy rains.
The slope stability and traction increase greatly, the risk of tipping over is considerably reduced alongside with increased driving comfort.

Stepless CVR gearbox for efficient power transfer

Direct power transmission with cardan shafts ensures even traction at all wheels with very high torque

As a unique selling proposition on the market of 3-axle sugar beet harvesters, the Tiger has a direct power transmission via directly linear situated cardan shafts from traction drive to both rear axles and front axle, which is a great advantage for better traction in changing or difficult soil and harvesting conditions. Thanks to hydraulic chassis the load is always distributed evenly.

Stepless CVR gearbox for efficient power transfer

The new stepless traction drive was specifically developed by ROPA, Omsi and Bosch-Rexroth for the ROPA Tiger with its high drive power. The "constant variable ROPA" gearbox (CVR) consists of three hydraulic motors on a compound gearbox and is located between the engine compartment and the third axle. The maximum speed of 40 km/h can be reached by the Tiger 6S at an extremely economical 1,200 rpm. Harvesting in the field requires an engine speed of only 1,100 rpm. Depending on power requirements the rotational speed of the Tiger is automatically regulated up to 1,650 rpm. The multi-disk differential brakes integrated into the axles (protected from dirt) running in oil bath "tame" the Tiger as required.