Crushing device for waste tire and multi-functional crusher with crushing device

A crushing device for a waste tire, comprising a roll shaft and crushing components arranged on the roll shaft, wherein:

• the roll shaft comprises a main shaft, a roll shaft main body fixedly arranged on the main shaft, and roll shaft blockers arranged at two axial ends of the main shaft;
• a plurality of roll shaft convex bodies are arranged on a periphery of the roll shaft main body along a circumferential direction;
• and a roll shaft groove is formed between each two adjacent roll shaft convex bodies;
• the crushing components comprise tools, axial interval adjusting blocks and/or radial supporting blocks, wherein:
• each tool consists of a tool base and a tool head which are fixedly connected, and a tool base groove, corresponding to the roll shaft convex body, is provided on the tool base;
• the tools are cutting tools and/or grinding tools;
• symmetrical cutting convex surfaces are arranged at a connection surface between a tool base and a tool head of each cutting tool along an axial direction of a cutting tool base groove;
• and a grinding convex surface is arranged at a side of a connection surface between a tool base and a tool head of each grinding tool along an axial direction of a grinding tool base groove;
• each radial supporting block consists of a supporting main body and a supporting base, wherein:
• a supporting groove, corresponding to the roll shaft convex body, is provided on the supporting base;
• and a supporting convex surface is arranged at a side of a connection surface between the supporting main body and the supporting base along an axial direction of the supporting groove;
• and
• an axial interval adjusting block groove, corresponding to the roll shaft convex body, is provided on each axial interval adjusting block;
• the tools, the radial supporting blocks, and the axial interval adjusting blocks are slidably engaged with the roll shaft convex bodies;
• and the roll shaft blockers and the crushing components are locked and fixed through locking structures.