Mechanical part e.g. chain, protection shoe for e.g. quad bike, has spacing unit provided between upper and lower walls of double wall for increasing rigidity of structure, where double wall has upper and lower plates welded via spacers

摘要

The shoe (1) has a fixation unit (6) for fixing the shoe to a quadricycle, and a structure (7) with a double wall (8) formed by a tubular element. The double wall has an upper wall (9) and a lower wall (10) with different thicknesses. A spacing unit is provided between the upper and lower walls for increasing rigidity of the structure. The double wall has upper and lower plates welded directly or indirectly with each other via spacers.