Grinding roller for waste tires and multifunctional crusher having the same grinding roller

A grinding roller for waste tires, comprising a roll shaft and a plurality of grinding components arranged on the roll shaft;

• wherein:
• each of the plurality of grinding components comprises a plurality of grinding blocks and a grinding frame comprising a plurality of grooves on a peripheral part thereof, and the plurality of grinding blocks, the number of which is the same as the number of the plurality of grooves, are configured be mounted in the plurality of grooves in a one-to-one manner;
• in each of the plurality of grinding components:
• the plurality of grooves are spaced at constant intervals along a circumferential direction of the grinding frame;
• the plurality of grooves each extends longitudinally and radially with respect to an axis of the roll shaft;
• the plurality of grinding blocks each comprises a grinding surface and a threaded hole located in a central part of the grinding surface;
• when one of the plurality of grinding blocks is mounted in a corresponding one of the plurality of grooves, a height of the grinding surface with respect to a bottom of the one of the plurality of grooves is larger than a height of a top surface of the corresponding one of the plurality of grooves with respect to the bottom of the one of the plurality of grooves.