Vertical shaft impact crusher

A vertical shaft impact crusher having

• a housing,
• a vertical rotating shaft (11) rotatably provided in said housing and rotated at a high speed, and
• a rotor (10) provided on an upper end of said vertical rotating shaft (11) to discharge centrifugally an object of crushing, which is cast into said housing, toward an impact surface (18) disposed at an outer periphery thereof,
• wherein the improvement comprises
• means for driving said vertical rotating shaft (11) to rotate forwardly and backwardly,
• a rotor body (21) secured to said vertical rotating shaft (11),
• a substantially disk-shaped distributing plate (22) disposed in a center of an upper side of said rotor body (21),
• a plurality of supports (23) provided on the upper side of said rotor body (21) at a regular angular spacing around an outer periphery of said distributing plate (22),
• blades (24) disposed on said supports (23), respectively, so as to cover at least two side surfaces of each support (23),
• means (48) or (98) for detachably retaining said blades (24) on said supports (23),
• a discharge passage (44) formed in between each pair of adjacent blades (24), and
• a discharge passage liner (25) disposed on said discharge passage (44);
• wherein said blades (24) each comprise
• a base (40) which covers an inward end face of said support (23) as viewed in the radial direction of said rotor body (21), and
• a pair of blade plates (41a) and (41b) which extend outwardly in said radial direction from both ends of said base (40) to cover said two side surfaces of said support (23).

A vertical shaft impact crusher having

• a housing,
• a vertical rotating shaft rotatably provided in said housing and rotated at a high speed, and
• a rotor provided on an upper end of said vertical rotating shaft to discharge centrifugally an object of crushing, which is cast into said housing, toward an impact surface disposed at an outer periphery thereof,
• wherein the improvement comprises
• means for driving said vertical rotating shaft to rotate forwardly and backwardly,
• a rotor body secured to said vertical rotating shaft,
• a substantially disk-shaped distributing plate disposed in a center of an upper side of said rotor body,
• a plurality of supports provided on the upper side of said rotor body at a regular angular spacing around an outer periphery of said distributing plate,
• blades disposed on said supports, respectively, so as to cover at least two side surfaces of each support, which extend substantially radially of said rotor body,
• means for detachably retaining said blades on said supports,
• a discharge passage formed in between each pair of adjacent blades, and
• a discharge passage liner disposed on said discharge passage;
• wherein said blades each comprise
• a base which covers an inward end face of said support as viewed in the radial direction of said rotor body,
• a pair of blade plates and which extend outwardly in said radial direction from both ends of said base to cover said two side surfaces of said support, and
• a curved portion which connects respectively distal ends of said blade plates and covers an outward end face of said support as viewed in said radial direction.

A vertical shaft impact crusher having

• a housing,
• a vertical rotating shaft rotatably provided in said housing and rotated at a high speed, and
• a rotor provided on an upper end of said vertical rotating shaft to discharge centrifugally an object of crushing, which is cast into said housing, toward an impact surface disposed at an outer periphery thereof,
• wherein the improvement comprises
• means for driving said vertical rotating shaft to rotate forwardly and backwardly,
• a rotor body secured to said vertical rotating shaft,
• a substantially disk-shaped distributing plate disposed in a center of an upper side of said rotor body,
• a plurality of supports provided on the upper side of said rotor body at a regular angular spacing around an outer periphery of said distributing plate,
• blades disposed on said supports, respectively, so as to cover at least two side surfaces of each support, which extend substantially radially of said rotor body,
• means for detachably retaining said blades on said supports,
• a discharge passage formed in between each pair of adjacent blades, and
• a discharge passage liner disposed on said discharge passage;
• wherein said blades each comprise a pair of blade plates which cover said two side surfaces of said support independently of each other;
• and
• wherein said retaining means for said blades comprises
• grooves formed in said two side surfaces of said support,
• projections formed on respective surfaces of said blade plates, which face said support, so as to be engageable with said grooves,
• ridges formed on respective upper sides of said blade plates to extend in said radial direction,
• a top plate disposed to cover an upper side of said support, and
• downwardly extending portions formed on respective lower sides of two end portions of said top plate, which extend in said radial direction, so as to be engageable with said ridges of said blade plates.