Patent ID: 8613558
Filing Date: 2013-12-24
Classification: F16C

Abstract:
1. A constant preload device of a ball bearing, the preload device comprising: an elastic member having a hollow shape with openings at both sides in an elastic direction; and two holders which are inserted into the openings at the both sides of the elastic member, respectively, wherein each of the holders includes: wherein in the first position the claw parts of the respective holders contact each other to regulate separation therebetween in the elastic direction such that the elastic member is held between the holders to have a first length which is shorter than a free length of the elastic member, and in the second position the claw parts of the respective holders are separated by a distance in the elastic direction such that the elastic member is held between the holders to have a second length which is shorter than the first length, and wherein when the preload device applies preload to the ball bearing, the ball bearing is contacted to the preload device only at an outer ring of the ball bearing.