| 摘要 |
<p>#CMT# #/CMT# The gear has moving toothed parts comprising uniformly distributed teeth with zones elastically deformable in a direction of its respective thickness. The sum of nominal thickness (eSJ, e2) of two teeth in contact with the respective moving parts, measured along pitch circles (C1, C2) of the parts, gives a resultant dimension greater than the pitch (p) of the parts. The thickness of the deformable zone extends on either side of theoretical profile of the teeth. #CMT#USE : #/CMT# Used for a timepiece mechanism (claimed) such as wristwatch. #CMT#ADVANTAGE : #/CMT# The sum of nominal thickness of two teeth in contact with the respective moving parts gives the resultant dimension greater than the pitch of the parts, thus eliminating the backlash in the teeth of the gear. The thickness of the deformable zone extends on either side of the theoretical profile of the teeth, so that the clamping of the teeth is prevented. The gear permits to compensate the defects such as roundness distortion, off-centrating, inclination of axes, variation in the penetration of teeth, play of pivots in bearings, wear, buckled tooth and lubricant ageing. The gear also permits to form asymmetric teeth with flexible portions having different elastic properties, so that the efficiency in direction of rotation of the gear is improved. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a partial view of a configuration of a gear. C1, C2 : Pitch circles eSJ, e2, e : Teeth`s thickness p : Pitch.</p> |
