Waste shredder, component parts and maintenance method

A rotor for a waste grinder comprising:

• a shaft (3);
• a shearing wheel, comprising
• a cylindrical ring-support (6), which has two lateral cheeks (27,28) and a peripheral surface (29) which define a plurality of sections (30,31), said ring-support being designed to be rotated around an axis by the shaft (3);
• a plurality of shearing blades (8,9), each of which has an outer lateral shearing surface (18,21), each blade being disposed corresponding to a section (30) of the peripheral surface (29) of the ring-support (6), to project radially relative to said peripheral surface, said shearing wheel comprising
• a plurality of blade-holder parts (7), each comprising a surface (23), known as the inner surface, with a shape which is designed to be applied to a section (30) of the peripheral surface (29) of the ring-support, a surface (26), known as the outer surface, which is opposite the inner surface, and at least one lateral surface (24) for securing a shearing blade (8);
• first means for detachable securing (11-14), which are designed to permit securing of a shearing blade (8,9) onto a blade-holder part (7), and are accessible from the outer lateral shearing surface (18) of the blade, said blade being designed to be secured onto the blade-holder part opposite a lateral securing surface (24,25) of said part, in order to form a rigid blade-holder/blade assembly (34) together with the blade-holder part;
• and
• second means for detachable securing (15-17), which are designed to permit securing of a blade-holder part (7) onto the ring-support (6), and are accessible from the outer surface (26) of said blade-holder part, in order to allow the blade-holder/blade assembly (34) to be secured onto the ring-support, or removed from the ring-support;
• the shearing wheel being integral with the shaft (3) which rotates said wheel;
• and
• plurality of identical wheels which are spaced regularly along the drive shaft (3), each blade-holder part (7) of each of said wheels having two lateral securing surfaces (24,25) onto each of which a blade (8,9) is secured-r to form around said wheel two continuous opposite lateral shearing surfaces.

A shearing wheel for a waste grinder, comprising:

• a cylindrical ring-support (6) with two lateral cheeks (27,28) and a peripheral surface (29) defining a plurality of sections (30,31), said ring-support being rotatable around an axis;
• a plurality of shearing blades (8,9), each blade having an outer lateral shearing surface (18,21), each blade being disposed corresponding to a section (30) of the peripheral surface (29) of the ring-support (6) to project radially relative to the peripheral surface, wherein said shearing wheel comprises
• a plurality of blade-holder parts (7), each blade-holder part comprising i) an inner surface (23) with a shape to be applied to a section (30) of the peripheral surface (29) of the ring-support, ii) an outer surface (26), opposite the inner surface, and iii) at least one lateral surface (24) for securing a shearing blade (8);
• a first securing means (11-14) to permit detachable securing of the shearing blade (8,9) onto the blade-holder part (7), the blade to be secured onto the blade-holder part opposite a lateral securing surface (24,25) of the blade-holder part, in order to form a rigid blade-holder/blade assembly (34) together with the blade-holder part, the first securing means being accessible from the outer lateral shearing surface (18) of the blade;
• and
• a second securing means (15-17) to permit detachable securing of the blade-holder part (7) onto the ring-support (6) in order to allow the blade-holder/blade assembly (34) to be secured onto the ring-support, or removed from the ring-support, the second securing means being accessible from the outer surface (26) of said blade-holder part, wherein,
• each section (30) of the ring-support supports a blade-holder part (7), and each blade-holder part (7) supports at least one blade (8), the blades being arranged around the ring-support (6) so that two adjacent blades are contiguous, the outer lateral shearing surfaces (18) of the blades forming a continuous lateral shearing surface, and
• each blade-holder part (7) has two lateral surfaces (24,25) for securing a blade, onto each of which a blade (8,9) is secured to form two opposite continuous lateral shearing surfaces on the periphery of the wheel.