Spider arm shield

A gyratory crusher spider protection assembly comprising:

• a plurality of arm shields arranged to be releasably mounted over each of a plurality the spider arms that extend radially outward from a central hub or a spider positioned on a top shell of a gyratory crusher, each shield including a tunnel having a roof and sidewalls arranged to be positioned over and at least partially around a spider arm to protect an upper and side faces of the arm, the tunnel having a radially inner end arranged to be positioned at the hub and a radially outer end arranged to be positioned at a perimeter of the spider, an arm shield rear wall projecting upwardly from the radially outer end of the tunnel, the arm shield rear wall having an inner face orientated radially inwards towards the tunnel and an outer face orientated radially outward away from the tunnel, the arm shield rear wall representing a radially outermost part of the arm shield;
• a fixating ring arranged to be positioned on top of and at the perimeter of the spider to extend circumferentially around at least part of the spider and the arm shields, wherein each arm shield includes at least one attachment element provided at the rear wall to attach the shield to a fixating ring via the outer face;
• and
• a plurality of fixation elements securable respectively to each of the attachment elements to releasably fix the arm shields to the fixating ring such that the arm shields and fixating ring are configured to form a unitary assembly.

A gyratory crusher comprising:

• a spider having a central hub and a plurality of spider arms extending radially outward from the hub towards an outer perimeter of the spider;
• a material feed hopper mounted axially above the spider;
• and
• a spider protection assembly including a plurality of arm shields arranged to be releasably mounted over the plurality the spider arms, each arm shield including a tunnel having a roof and sidewalls arranged to be positioned over and at least partially around a spider arm to protect upper and side faces of the arm, the tunnel having a radially inner end arranged to be positioned at the hub and a radially outer end arranged to be positioned at a perimeter of the spider, a rear wall projecting upwardly from the radially outer end of the tunnel, the rear wall having an inner face orientated radially inwards towards the tunnel and an outer face orientated radially outward away from the tunnel, the rear wall representing a radially outermost part of the arm shield;
• a fixating ring arranged to be positioned on top of and at the perimeter of the spider to extend circumferentially around at least part of the spider and the arm shields, wherein plurality of arm shield include attachment elements provided at the rear wall;
• and
• a plurality of fixation elements securable respectively to each of the attachment elements to releasably fix the arm shields to the fixating ring such that the arm shields and fixating ring are configured to form a unitary assembly wherein the fixating ring is positioned axially intermediate the spider and the hopper.