Patent ID: 9339345
Filing Date: 2016-05-17
CPC Classification: A61B,Y10S

Claim Text:
1. A cutting apparatus for joint cutting system using robot comprising: a shaft combined with a motor in a part of a robot arm; a cutter having a cutting head at an end of the shaft; a sleeve in which the shaft is inserted; a cutter support member having a sleeve base where the sleeve is fixed, characterized in that the sleeve is a standalone member of a hollow bar with a center hole and is separable from and combinable with the sleeve base, wherein the sleeve has support bearings which are equipped in the center hole and support the shaft such that the shaft is rotatable, and in order to reinforce a strength against a bending force, the support bearings are located in a front side and a back side of the sleeve, which minimizes a reduction of a thickness of the sleeve, wherein the sleeve comprises a sleeve body of a hollow bar shape, a join body with a sleeve join part combined with a first base join part at a back end of the sleeve body, bearing install grooves located apart from each other on an inner circular surface of the sleeve for equipping the support bearings, a reinforcing part for reinforcing against a bending force to the sleeve body which is protruded toward a center of the center hole from an inner circular surface of the sleeve body between the bearing install grooves, wherein the support bearings consist of first to fourth support bearings, and wherein each of the first to fourth support bearings has multiple bearings consecutively arranged, an outside surface of which comes into contact with one of the bearing install grooves and an inside surface of which comes into contact with an outer circular surface of the shaft; reinforcing spacers which are equipped on the inner circular surface of the sleeve between the second support bearing and the fourth support bearing and between the first support bearing and the third support bearing and which has a center hole where the shaft is inserted; and end spacers for retraining a fluctuation of the shaft and having a center hole where the shaft is inserted, one of the end spacers is located between a front end of the center hole of the sleeve and the fourth support bearing and another of the end spacers is located between a back end of the center hole of the sleeve and the third support bearing, wherein a length of the reinforcing part equals to a separation distance between the first support bearing and the second support bearing, and wherein the reinforcing spacers include a first reinforcing spacer of which length equals to a separation distance between the second support bearing and the fourth support bearing.