This cylinder has been specially developed for mobile cranes with several actively steered rear axles. The steering of the rear axles significantly improves manoeuvring with these vehicles. A special requirement for the cylinder was that the steering centering cylinder should set the axle to run straight at a certain vehicle speed and in the case of a fault in the rear axle steering area. Legal security requirements also required a robust design with high reliability.

Advantages:

• The robust and reliable, exclusively hydraulic, active centre positioning without mechanical locking elements is almost wear-free.
• Check and pressure relief valves are located directly on the cylinder, minimizing the risk of pipe breakage and excessive external forces.
• Successfully tested on the endurance test system and meanwhile successfully used in series production for several years.

Nickel-chrome plating of the induction hardened piston rod with corrosion resistance 600h NSS R10′ (optionally with bellows)

Steels with notched bar impact values KV min. 27 J. at -40 °C transverse/longitudinal

TECHNICAL DATA:

PISTON DIAMETER: 80 mm and 70 mm

HOLDING FORCE AT EXTERNAL PULL FORCE: 84.1 kN

HOLDING FORCE AT EXTERNAL PUSH FORCE: 80.8 kN

Due to the design of most trucks, the engine is located directly underneath the driver’s cab. In order to guarantee the accessibility of the engine, a hydraulic system is used. The individually adjustable driver’s cab cylinder plays an important role here. Once activated, the cylinder retracts and initiates the tilting process of the driver’s cab. Once it reaches its end position, the cylinder holds the cab in a fixed position and thus ensures safe access to the engine compartment.

The WEBER-HYDRAULIK patented lost motion system ensures optimum comfort while driving. The cab tilt cylinder establishes a static connection between the chassis and the cab. During driving, however, the damping causes relative movements between these components. To compensate for these shocks, the cylinder must be freely movable while driving. The is possible with the lost motion system.

Advantages:

• Patented lost motion system for free movement of the cylinder during driving
• Robust and durable design

TECHNICAL DATA:

NOMINAL PRESSURE FORCE: max. 60 kN

NOMINAL PULL FORCE: max. 40 kN

Up to now, the force at the supporting cylinders has often been determined indirectly via the pressure in the piston chamber. However, this is very inaccurate and measurement deviations of more than 20% are possible, especially under the influence of lateral forces. In order to ensure stability at all times, however, appropriate safety factors are required, which in turn lead to reduced load capacity utilisation. For this reason, WEBER-HYDRAULIK developed a new supporting cylinder for a customer, in which the force is measured directly at the spherical head of the cylinder. For this purpose, an innovative force transducer has been developed that is fully integrated into the piston rod. A large number of realizable analog or digital output signals also ensure the best possible compatibility with the user’s systems.

Advantages:

• Fully integrated force measurement
• High measuring accuracy even under difficult ground conditions
• Mechanical decoupling of the force transducer in the rest position to protect the sensor from external influences and shocks
• Improved machine utilization due to maximum exploitation of the load capacity
• Online monitoring of the supporting situation and the degree of utilization of the stability limit
• Protection of the measuring technology against lateral forces and vibrations during driving

TECHNICAL DATA:

STROKE: 700 mm

ROD DIAMETER:160 mm

PISTON DIAMETER: 180 mm

The suspension cylinder with integrated piston accumulator developed by WEBER-HYDRAULIK is used as a chain tensioner in crawler chassis. The harsh conditions of the application mean that the components would be exposed to extreme conditions and heavy wear. This applies in particular to external storage devices that have to be connected to the vehicle’s electrical wiring. For this reason, an accumulator integrated into the cylinder has been developed, which is thus protected from the harsh environmental conditions. In addition, the system is particularly light due to the omission of components.

Advantages:

• Weight reduction due to the elimination of components
• Cylinders can be delivered filled, which results in less assembly effort.
• Compact installation dimensions
• Long lifetime

TECHNICAL DATA:

CYLINDER: EZ75

STROKE: 185 mm

NOMINAL PRESSURE: 210 bar

IMPLEMENTED OPTIONS:

• Customized installation length and piston diameter
• Customized mounting with a ball joint at the top and bottom
• Load-dependent preload of the integrated piston accumulator
• Low friction compact seal
• Corrosion protection piston rod chrome plating / surface treatment and customized paint system

The crown cylinder was specially developed for use in bending machines. During the bending process, the machine is subjected to extreme forces, which, among other things, cause deformation of the bending tool. The bending result is strongly affected by this so-called crowning and is therefore difficult to calculate.

The crown cylinder is used inside the machine to compensate for this deformation, it compensates the forces and thus guarantees an exact result.

Advantages:

• Patented lost motion system for free movement of the cylinder during driving
• Robust and durable design

TECHNICAL DATA:

NOMINAL PRESSURE: 300 bar

TEST PRESSURE: 310 bar

PUSH FORCE AT PN PER CYLINDER: 259,8 kN

WEBER-HYDRAULIK’s double acting steering cylinder is used in agricultural and construction machinery such as small loaders and backhoe loaders when using different steering modes such as crab steering and 4-wheel steering.
The requirement for this cylinder was that for steering control, the alignment of the axle to the straight position should be recorded. For this purpose, the middle position of the piston rod of the double acting steering cylinder is measured. This is enabled by means of magnetic detection. An external magnetic field sensor detects the magnetic field of a permanent magnet integrated in the piston. The cylinder tube is made of austenitic steel and cannot be magnetized.

Advantages:

• Robust cylinder design with few additional components for the realization of position detection with a very high reliability.
• The cylinder is pushed into the axle housing for mounting and bolted to the flange with the axle.
• The magnetic field sensor is plugged into the axle housing at the appropriate position and screwed in place.

TECHNICAL DATA:

CYLINDER FORCE (PULL/PUSH): 56 kN

NOMINAL PRESSURE: 185 bar

USED STROKE RANGE: 2 x 90,5 mm

The compacting plant cylinder with integrated damping is used in the municipal sector for garbage trucks.

TECHNICAL DATA:

PUSH FORCE 70MM AT PN: 53,1 kN

TEST PRESSURE: 180 bar

NOMINAL PRESSURE: 140 bar

IMPLEMENTED OPTIONS:

• Cardanic mounting
• Integrated damping

In addition to our customer-specific cylinder development, we also offer telescopic cylinders mainly as tilting cylinders for farm vehicles and 2 or 3-way tilting equipment.

The listed telescopic cylinder types are executed in a plunger construction with the piston rod side seal. Suspension pins with a gimbal ring are mounted at the cylinder surface. The piston’s last stage of the 2-stage telescopic cylinders is provided with a bore. The piston’s last stage of the 3-6 stage telescopic cylinders is provided with a ball socket for welding or screw mounting. A time-tested snap ring design combined with low wear wipers/seals made of polyurethane ensure reliability and low lubricant film thickness.

Advantages:

• Chromed extending pillar
• High nominal pressure
• Venting screw from piston diameter 75mm upwards

TECHNICAL DATA:

LIFTING SPEED RANGE: up tp 0,1 m/s

TEMPERATURE RANGE: -10C to + 80C

NOMINAL PRESSURE: 200 bar bar