Guide

Light, precise and robust for use in the most extreme conditions

Wheel guide elements (Linkages) and control arms have the task of safely and comfortably transferring all forces acting on the axles via the wheels into the frame. A precise, robust and at the same time light axle guidance linkageis a basic requirement for this. The elastomer bearings arranged in the kinematic points are intended to isolate shocks and vibrations and ensure precise wheel guidance, while the control arm must have sufficient strength with corresponding power reserves even under extreme conditions.

Here we present some of our innovative solutions.


Independent suspension

Advantages at a glance

In the electrification of buses, conventional structures of the drive train of an internal combustion engine are often still used. HEMSCHEIDT Fahrwerktechnik is working together with Ziehl-Abegg Automotive on an innovative chassis solution which makes optimum use of the advantages of electric mobility and thus generates added value for bus companies, drivers and passengers.

  • Optimum chassis solution for electric buses

  • Increased space in the bus interior

  • No need to tilt the boarding side at bus stops

  • Modularly designed semi-trailing arm axle

      • Fully electrically driven rear axle suspension up to 13.5 t axle load

      • semi-trailing independent suspension

      • axle width 2510 mm

      • wheel lift 150 mm

      • Drive power per wheel 120 kW


        Semi-trailing independent suspension

        In combination with a hydropneumatic suspension system and the use of an electric wheel hub drive, an semi-trailing independent suspension not only provides more space inside the bus but also improves comfort.

        The entire drive system, including control electronics, is located inside the rim with a choice of twin tyres or a Super Single, providing more freedom in the centre of the vehicle. By cleverly connecting the suspension cylinders, a stabiliser can be dispensed with. This makes it possible to achieve a minimum ride height, which is oriented towards a raised kerb at bus stops. Buses are no longer dependent on the boarding side tipping over and can transport faster and more effectively. Furthermore, the passage width in the vehicle can be widened by the axle drive concept.

        The semi-trailing arm axle has been designed modularly, so that air suspension including hydraulic damper and vehicle roll stabiliser as well as a pneumatic brake can also be integrated if required by the vehicle architecture. Retrofitting to a hydro-pneumatic system is therefore also possible.


        guide elements

        Vorteile auf einen Blick

        • Position-independent

        • Wear-free

        • Light

          • 9 tons axle load

          • Running heights from 180 mm

          • Reduction of service life and costs 

          Wear-free air suspension system with spring guide

          The air suspension system for trailer axles includes the spring guide, an innovative rubber-metal bearing in the front spring guide and the mechanical clamping solution for position-independent axle integration. It is wear-free and perfectly matched to the driving dynamics requirements of commercial vehicles. Europe's third largest trailer manufacturer uses the system for trailer axles.

          The position-independent clamping of the air spring components on the axle increases the flexibility in the trailer manufacturer's product range, as different frame widths can be realised.

          The position-independent clamping also has other significant advantages:

          • HEMSCHEIDT's air suspension is compatible with all common round 9 t axles.
          • This means for the trailer manufacturer: Standardisation of the frame structure.
          • Even short-term customer requirements can still be taken into account.
          • And for the customer this means: Free choice for the axle and common parts for the air suspension.


          Axle guides

          Advantages at a glance

          • Light, modular construction

          • High strength and wear-free for safe use and long service life

          • Defined stiffness in different directions for perfect elastokinematics

          • Precise axle guidance

          • High preload in the elastomer bearings for optimum performance

          • Use of the most modern materials and manufacturing processes


          The modular linkage system (MAL)

          HEMSCHEIDT develops, manufactures and supplies axle guides from the new modular axle guide system always according to customer requirements for individual applications.

          HEMSCHEIDT axle guides can be used in commercial vehicles, buses and other vehicles of all sizes as axle-guiding longitudinal or oblique control arms. In addition, the control arm is suitable for use as a coupling rod for stabilisers, Panhard rod or other control arms. The modular bearing kit is also advantageous for use in wishbones or as bearings for a wide range of purposes.


          The lightweight linkage system (LAL)

          The lightweight axle control arm is available as a sheet steel version made of high-strength to ultra-high-strength cold-formed steels. Here, two identical, precise steel control arm halves are joined together. The result is a high-strength, stiff control arm with advantageous torsional softness in the direction of tension/compression and at the same time very robust bearing support. Due to the innovative materials used, the handlebars are significantly lighter than standard handlebars on the market.


          The modular bearing kit (MLB)

          The elastomeric bearings used are of particular importance as they are intended to resolve the conflict of objectives between high deformability on the one hand and high robustness on the other. The basis is always the standardised, high-strength and precise inner core. The highly pre-stressed elastomer bearing shells ensure a long service life with low dynamic hardening. For an optimum ratio of radial to torsional stiffness, single or multi-layer cylindrical designs are used. If increased axial stiffness is required with predominantly cardanic deflection, convex designs are used. Concave designs provide an optimum ratio of increased axial stiffness and low torsional stiffness. 


          V-Links

          V-links from HEMSCHEIDT serve as a connection between car parts of rail vehicles. Their modular design enables the customer-specific definition of the length and angle spread. The secure transmission of longitudinal and transverse forces, in combination with a swivel joint that allows the necessary torsional degree of freedom, make the V-links a maintenance-free chassis component. Elastic bearings increase driving comfort and contribute to acoustic decoupling.


          Joints for trams

          V-links from HEMSCHEIDT serve as a connection between car parts of rail vehicles. Their modular design enables the customer-specific definition of the length and angle spread. The secure transmission of longitudinal and transverse forces, in combination with a swivel joint that allows the necessary torsional degree of freedom, make the V-links a maintenance-free chassis component. Elastic bearings increase driving comfort and contribute to acoustic decoupling.


          HNG 24.2 - the new compact joint

          This new compact joint combines the advantages of the tried and tested pitch axis position of the 19.5 joint family and the familiar passenger-friendly platform concept with the hydraulic technology of the predecessor model SKD 420, which has been tried and tested over many years.

          The HNG 24.2 is characterised by its compact design, simple installation and insensitivity to dirt. This makes it particularly suitable for markets that require uncomplicated, functional solutions. The integrated joint damping is maintenance-free and insensitive to interference. Due to the design of the joint, the main moving parts are located in an oil bath and therefore run with minimum wear. The interfaces, which are comparable to the universal joints, make integration into existing chassis concepts possible without any problems.

          Advantages:

          ·       Joint weight: 670 kg

          ·       Suitable for low and high floors

          ·       Closed integrated hydraulic damping system

          ·       Linear dynamic step damping

          ·       Rubber-elastic torsion connection

          ·       Passenger-friendly platform concept

          ·       Standardised interfaces

          0210496850
          info@hemscheidt.de