| 摘要 |
The present invention provides a supporting roller for a grass eliminator wherein a gear box is provided to be transmitted of motor's rotation power by being connected with a gripping bar in the form of a bar that can be gripped with hands, a rotary blade is installed by coupling with a rotary shaft installed for rotation with transmission of rotation power by the gear box and the rotary blade for a grass eliminator is made to be separated from the ground upon grass elimination operations by binding to a male screw part of a grass eliminator having a male screw part formed by extension from the end of a lower side of a rotary shaft protruded from a lower side of the rotary blade. The present invention comprises; a body of a downward hemispherical form with empty inside wherein the male screw part is supported by insertion in a rotary shaft formed, and a curved part is formed outward from a lower end of the periphery around a concave pipe formed in the center ; a ball bearing fixed by insertion inside a concave pipe of the body; a protrusion formed by extension from an internal circumference of an upper end of the concave pipe in a center horizontal direction to prevent departure of the ball bearing in an upward direction of the concave pipe; a stationary ring provided on a lower end of the ball bearing to have the ball bearing supported by the protrusion fixed inside the concave pipe; a fastening nut to form a female screw part on an upper side positioned on a lower side of the stationary ring to be fastened to the male screw part penetrating the concave pipe of the body for insertion; and a ring for height adjustment positioned between a lower side of the rotary blade and an opposed upper side of the ball bearing and provided for smooth rotation in a separated condition without contacts between a lower side of the rotary blade and an upper side of the ball bearing upon fixing by fastening to the rotary shaft with a fastening nut. |
