Reciprocating-type abrasive device for a sanding machine

A reciprocating-type abrasive device for a sanding machine having a machine body mounted with a sanding module at the top end of the machine body, the module being provided with a support frame having one end mounted with a driving roller having a driving motor, the other end of the support frame being a reciprocating-type sanding machine having a driven roller, the driven roller corresponding to the driving roller and both being surrounded by a sanding belt, the reciprocating-type abrasive device comprising a driving structure and a reciprocating structure, and the reciprocating structure mounted with a sanding wheel driven to reciprocate up and down by the driving structure, the reciprocating abrasive device disposed with a fixing rod mounted to the support frame, and the driving structure being mounted at the lateral wall of the horizontal section of the fixing rod, and the reciprocating structure being mounted at the top end of the horizontal section of the fixing rod, and a hole being formed on the middle section of the fixing rod such that the driving structure moves the reciprocating structure;

• and the driving structure using a servomotor to drive a main shaft having an eccentric protrusion at one free end thereof, a bearing corresponding to the fixing rod being mounted on the eccentric protrusion;
• the fixing rod being mounted onto the eccentric protrusion, the fixing rod mounted with a seat body having a hollow protrusion, and a top support rod being inserted within the hollow protrusion, the external edge of the protrusion being mounted with a hollow driven roller by means of a bearing, the driven roller being provided with a shaft sleeve having a tapered hole slidably mounted with a main shaft rod having an axial sliding slot, and the shaft sleeve being mounted with a positioning rod slidably mounted to the sliding slot such that the main shaft can slide up and down with respect to the shaft sleeve, and a pad being provided in between the shaft sleeve, and the main shaft rod, and the main shaft rod located at the lower section of the pad being mounted with a spring, and the bottom end of the main shaft rod being locked with a liming plate for the urging of the spring such that the main shaft rod urges at the top support rod, the top support rod pressing against the bearing of the driving structure, thereby the reciprocating-type abrasive device for a sanding machine is obtained.