Patent ID: 9618082
Date: 2017-04-11
CPC Classifications: F16H,Y10T

Claim:
1. A worm gear comprising: a worm formed with a through hole through which a shaft transmitting the rotation of a motor is inserted, the shaft having a diameter; a worm wheel configured to mesh with the worm and transmit the rotation to an output shaft; and a grease pool having an area, wherein the diameter of the shaft is φ3.0-5.0 mm and the area of the grease pool is 0.20 mm wherein the worm wheel is formed of a resin material, wherein the worm is formed of a metallic material, and wherein, given that a normal pitch is denoted by E and a width of a recess formed to extend from the root circle toward a center of a worm axis, in the direction of a worm axis by H, the worm is configured such that is met.