Patent ID: 9732837
Date: 2017-08-15
CPC Classifications: F16F,F16H

Claim:
1. An idle gear assembly comprising: an outer ring having a hollow cylindrical shape and having gear teeth formed on an external surface of the outer ring, the gear teeth engaged with a crank gear and any one of the left and right balance gears of a balance gear shaft (BSM); a bearing including: an inner member in a radial direction of the bearing, the inner member having an insertion hole formed at a center portion of the inner member; an outer member in the radial direction of the bearing, the outer member relatively rotating with respect to the inner member and fixedly mounted at a hollow portion of the outer ring; and a plurality of rolling bodies disposed between the inner member and the outer member; a ring having a hollow cylindrical shape and elasticity in a radial direction of the ring; a hub having a hollow cylindrical shape such that the ring is inserted into an internal surface of the hub and having a flange that is in contact with the bearing and a penetration hole, in which the flange and the penetration hole are formed at one side of the hub in an axial direction; a nut inserted through another side of the hub in the axial direction and mounted at a hollow portion of the ring; and a bolt inserted sequentially through the insertion hole of the bearing, the penetration hole of the hub, and the nut and fixing the bearing and the hub to each other, wherein the idle gear assembly disposed between the crank gear and the any one of left and right balance gears to equalize rotational directions of the crank gear and the any one of the left and right balance gears.