| 摘要 |
The present invention relates to an excavator rotation tool comprising: an upper frame having a first penetration hole at the center and a connection hole at the top, connected to an end of the excavator; a lower frame having a second penetration hole at the center and arranged at the bottom of the upper frame; and a motor generating power to rotate the lower frame and arranged at one side of the upper frame. At the bottom of the upper frame, a first protruding part protruding toward a lower side and covering the first penetration hole, is arranged. At the outer surface of the first protruding part, a first accommodation groove in which a bearing is placed and which is dent toward the first penetration hole, is arranged. The second protruding part protruding toward the upper side and covering the second penetration hole is placed at the upper end of the lower frame. A second accommodation groove in which bearing is accommodated is formed as it is dent toward the second penetration hole at the inner side of the second protruding part. At the outer surface of the second protruding part, a gear capable of rotating the lower frame with the help of rotational force of the motor is arranged. The upper and lower frames are combined by bearings arranged at the inner side of the first and second accommodation grooves while the first protruding part is inserted into the second protruding part. The lower frame is rotated by the gear receiving the rotational force of the motor. |
