Excavating, sieving and grading device for working crawler

An excavating, sieving and grading device for a working crawler comprising a bucket main body swingably mountable at an extreme end of an arm of the working crawler;

• an excavating blade formed at a front end of said bucket main body;
• a movable frame forwardly and backwardly movably disposed on a bottom opening of said bucket main body;
• a sieve net provided on said movable frame;
• a drive unit connected to said movable frame and mounted on said bucket main body for reciprocatingly moving the movable frame forwardly and backwardly;
• pairs of legs, wherein each pair comprises a right and left leg vertically disposed on a rear half portion of said bucket main body in corresponding locations on opposite sides of said bucket main body;
• said movable frame being located at all times integrally on said bucket main body;
• a first reinforcing member connecting said first right and left legs to each other;
• a second reinforcing member connecting said second right and left legs to each other;
• a first guide rail disposed on a bottom surface of said movable frame;
• first and second guide rollers for supporting and guiding said first guide rail, said first and second guide rollers being provided on said first and second reinforcing members;
• a pair of lateral shafts attached to sides of a front half portion of said movable frame;
• third guide rollers rotatably supported by said lateral shafts;
• a second guide rail on said bucket main body with said third guide roller rollably supported and guided thereon;
• vertical shafts on said bucket main body;
• fourth guide rollers rotatably supported by said vertical shafts and rollably abutted against right and left sides of said movable frame;
• and an adhered material removing member provided on said bucket main body and disposed above said sieve net and removing a material adhered to said sieve net.

An excavating, sieving and grading device for a working crawler comprising a bucket main body swingably mountable at an extreme end of an arm of the working crawler;

• an excavating blade formed at a front end of said bucket main body;
• a movable frame forwardly and backwardly movably disposed on a bottom opening of said bucket main body;
• a sieve net provided on said movable frame;
• a drive unit connected to said movable frame and mounted on said bucket main body for forwardly and backwardly reciprocatingly moving the movable frame;
• a pair of first right and left legs vertically disposed on a rear half portion of said bucket main body;
• said movable frame being located at all times integrally on said bucket main body;
• a first reinforcing member connecting said first right and left legs to each other;
• a first support and guide member for supporting and guiding a bottom surface of said movable frame provided on said first reinforcing member;
• a pair of second right and left legs vertically disposed on said bucket main body at a position forwardly of said first legs;
• a second reinforcing member connecting said second legs to each other;
• and a second support and guide member for supporting and guiding the bottom surface of said movable frame provided on said second reinforcing member.