Patent ID: 7690476

Claim:
A clearance adjusting decelerator, comprising: a rotary housing including a worm/motor housing having a worm therein and a worm wheel housing having both sides open and having a worm wheel therein, the rotary housing being rotatable about a worm wheel housing pivot center axis; a first worm wheel housing cap including a first cap tooth formed on one side surface and a first body integrally formed with the first cap tooth, the first body having a first inserting hole, formed on a center portion, to have a shaft pass in it and at least one first assembly hole formed on a rim thereof, wherein a worm wheel center axis passing through a center of the first inserting hole is spaced apart from the worm wheel housing pivot center axis; a second worm wheel housing cap including a second cap tooth formed on one side surface and a second body integrally formed with the second cap tooth, the second body having a second inserting hole, formed on a center portion, to have the shaft pass in it and at least one second assembly hole formed on a rim thereof, wherein a worm wheel center axis passing through a center of the second inserting hole is spaced apart from the worm wheel housing pivot center axis; at least one fastening member passing through at least one first assembly hole formed on the first worm wheel housing cap and at least one second assembly hole formed on the second worm wheel housing cap; and wherein clearance between the worm and the worm wheel is adjusted by rotating the rotary housing relative to the worm wheel housing pivot center axis.