Shot blasting machine and impeller assembly thereof

Abstract

A shot blasting machine includes a shot processing assembly, at least one impeller assembly, a collecting assembly, and a lifting assembly. The at least one impeller assembly includes a pair of rotary plates, a plurality of impeller blades, a plurality of connecting rods, and a protective case body. Each of the rotary plates has a central hole, a plurality of impeller blade grooves, and a plurality of limiting recesses. Each of the plurality of impeller blade grooves has a groove bottom part that is adjacent to the central hole and a groove top part that is adjacent to a circumference of each of the pair of rotary plates. Each of the plurality of impeller blades including a vane part and a pair of blade side parts that are connected to two sides of the vane part, and each of the blade side part has a limiting protrusion.

What is claimed is: 
     
         1 . An impeller assembly of a shot blasting machine, comprising:
 a pair of rotary plates, each of the pair of rotary plates including a central hole, a plurality of impeller blade grooves, and a plurality of limiting recesses, wherein the plurality of impeller blade grooves extend from the central hole toward a circumference of each of the pair of rotary plates, each of the plurality of impeller blade grooves has a groove bottom part that is adjacent to the central hole and a groove top part that is adjacent to the circumference of each of the pair of rotary plates, an inner groove width of the groove bottom part is greater than an inner groove width of the groove top part, and the plurality of limiting recesses are further recessed in the plurality of impeller blade grooves;   a plurality of impeller blades, each of the plurality of impeller blades including a vane part and a pair of blade side parts, the pair of blade side parts being connected to two sides of the vane part, and each of the blade side parts having a limiting protrusion, wherein one of the blade side parts of each of the plurality of impeller blades is accommodated in one of the plurality of impeller blade grooves, the limiting protrusion is accommodated in the limiting recess, a shape of the pair of blade side parts corresponds to a shape of the plurality of impeller blade grooves, each of the pair of blade side parts has a root thickness corresponding to the groove bottom part and a top thickness corresponding to the groove top part, and the root thickness is greater than the top thickness;   a plurality of connecting rods, the plurality of connecting rods being connected to the pair of rotary plates; and   a protective case body, the protective case body covering the pair of rotary plates and the plurality of impeller blades, and defining a blast-exiting plane, wherein the protective case body includes a front inclined baffle and a back baffle, the back baffle is substantially orthogonal to the blast-exiting plane, and the front inclined baffle is inclined toward the blast-exiting plane.   
     
     
         2 . The impeller assembly according to  claim 1 , wherein each of the plurality of limiting recesses is adjacent to the groove bottom part, and tops of the plurality of impeller blades exceed the circumferences of the pair of rotary plates. 
     
     
         3 . The impeller assembly according to  claim 1 , further comprising an impeller head and a distributor, wherein an inner side of the impeller head is connected to one of the pair of rotary plates, an outer side of the impeller head is connected to a motor and the impeller head is driven by the motor, the distributor is connected to the inner side of the impeller head and movably positioned in the central holes of the pair of rotary plates, and the distributor has a plurality of penetrating slots formed therein. 
     
     
         4 . The impeller assembly according to  claim 3 , further comprising an input tube that receives shots, an exit end of the input tube being fixedly connected to a control cage, the control cage being fixedly positioned in the central holes of the pair of the rotary plates, and the distributor being rotatably positioned in the control cage, wherein the control cage has an exit. 
     
     
         5 . The impeller assembly according to  claim 1 , wherein the protective case body further includes an upper curved board and a pair of side protective boards, two ends of the upper curved board are connected to the front inclined baffle and an upper edge of the back baffle, respectively, and the pair of side protective boards are correspondingly positioned at two sides of the upper curved board, the front inclined baffle and the back baffle, and are connected to side edges of the upper curved board, the front inclined baffle, and the back baffle. 
     
     
         6 . The impeller assembly according to  claim 1 , further comprising an outer cover shell covering over the protective case body. 
     
     
         7 . A shot blasting machine, comprising:
 a shot processing assembly used for processing the shots, the shot processing assembly including an output part;   at least one impeller assembly positioned under the output part, and receiving the shots, each of the at least one impeller assembly including:
 a pair of rotary plates, each of the pair of rotary plates including a central hole, a plurality of impeller blade grooves, and a plurality of limiting recesses, wherein the plurality of impeller blade grooves extend from the central hole toward a circumference of each of the pair of rotary plates, each of the plurality of impeller blade grooves has a groove bottom part that is adjacent to the central hole and a groove top part that is adjacent to the circumference of each of the pair of rotary plates, an inner groove width of the groove bottom part is greater than an inner groove width of the groove top part, and the plurality of limiting recesses are further recessed in the plurality of impeller blade grooves; 
 a plurality of impeller blades, each of the plurality of impeller blades including a vane part and a pair of blade side parts, the pair of blade side parts being connected to two sides of the vane part, and each of the blade side part has a limiting protrusion, wherein one of the blade side parts of each of the plurality of impeller blades is accommodated in one of the plurality of impeller blade grooves, the limiting protrusion is accommodated in the limiting recess, a shape of the pair of blade side parts corresponds to a shape of the plurality of impeller blade grooves, each of the pair of blade side parts has a root thickness corresponding to the groove bottom part and a top thickness corresponding to the groove top part, and the root thickness is greater than the top thickness; 
 a plurality of connecting rods, the plurality of connecting rods being connected to the pair of rotary plates; and 
 a protective case body, the protective case body covering the pair of rotary plates and the plurality of impeller blades, and defining a blast-exiting plane, wherein the protective case body includes a front inclined baffle and a back baffle, the back baffle is substantially orthogonal to the blast-exiting plane, and the front inclined baffle is inclined toward the blast-exiting plane; 
   a collecting assembly, the collecting assembly being positioned under the at least one impeller assembly, so as to collect the shots; and   a lifting assembly, the lifting assembly transporting the shots that are collected back to the shot processing assembly.