| 摘要 |
PROBLEM TO BE SOLVED: To permit meshing of sufficient strength even when parallelism of both meshing gears is slightly different, by forming a portion of a tooth in the facewidth direction based on ordinary gear specifications and forming the remainder of the teeth so that a predetermined clearance is formed between meshing teeth of the other gear. SOLUTION: A portion 10b of a meshing teeth 10a of a movable gear 10 is formed based on an ordinary gear specifications. A remainder portion 10c is formed with a thinner tooth width so as to form a predetermined clearance between meshing teeth of a fixed gear. Therefore, during normal use, a load applied to the meshing teeth 10a is small as long as a portion 10b formed based on the ordinary gear specifications of a movable gear 10 and the meshing teeth of the fixed gear are engaged. As a result, meshing of sufficient strength can be obtained even when the parallelisms of the movable gear and the fixed gear are slightly different, eliminating looseness thereby. |
