Roll cage
Rollover devices are special purpose fixtures in vehicles that are designed to protect the occupants in the event of a rollover.
Roll bar
Roll bars are spatial metal tube lattice structures that are usually installed in convertibles as well as in tuned cars and in racing and rally cars. These designs are intended to prevent in a rollover, the roof becomes very depressed, so that a survival space remains, and ensure the survival space without a roof in an open convertible. In contrast to the roll cage, the rollbar limited to one level in the longitudinal axis, conveniently the B-pillar. Bracings at the back are functional, but do not change the definition.
Modern convertibles have also partly on active rollover bars, which shoot out in the event of a rollover in a split second.
Closed cars do not have a separate roll bar, however, the self-supporting bodies are mostly amplified according to the area of the B -pillar.
Even when there are tractors roll bar, as they are especially vulnerable in steep terrain in agriculture and forestry. However, since the majority are equipped with cabs today, they are already built roll-over protection.
Roll cage
Roll cage, a metal construction is given, which is usually installed in vehicles that are used in motorsport. The amount of the A-pillar and B-pillars extending in the interior of a respective tube along the contour of the body. The two pipes extend from the vehicle floor to above the head height of the passenger, to protect them from injury due to deformation of the vehicle. Cases, the two main temples are connected by a lateral edge protection and supplemented by a so-called H- brace behind the seats.
For the fitness in motorsport the respective construction must be homologated and comply with realistic demands on material thickness and strength. Diagonal struts and a support at the back are required. The extension of a roll cage then corresponds to a so-called safety cell, which stiffens the vehicle fundamentally unlike the conventional "cage".
Safety cell
A safety cell features based on the roll cage to better protect the occupants and a higher rigidity of the body through connections on the A, B and optionally C -pillar. Connections to the domes, front and rear are included as well as more bars for the roof, foot, head and dashboard area. Ideally, the pipe joints should be welded and reinforced at junctions with additional sheets. The aim is to secure a sufficient survival space for the occupants of the acceleration values must not be too high on the occupants. A useful support for security cells can be found for the next occupant harness, helmet and fire-resistant clothing when HANS system.
The motor sports organizations (international FIA, national in Germany the DMSB ) give this repeatedly innovations out.