Patent ID: 8220369
Filing Date: 2012-07-17
Classification: B25B

Abstract:
1. A torque adjustable sleeve assembly comprising: a first part having an insertion hole defined in a first end thereof and a connection hole defined in a second end of the first part, a bottom surface of the insertion hole having a series of first teeth annularly formed thereon and facing a second part, a first through hole defined through a center of the first part and communicating the insertion hole with the connection hole; the second part having a first end rotatably inserted into the insertion hole of the first part, the first end having a series of second teeth annularly fowled thereon, the second teeth facing the first part for engaging with the first teeth, a second through hole defined through a center of the second part and communicating with a driving hole defined in a second end of the second part, any one of inner diameters of the first and second through holes being relatively smaller than any one of inner diameters of the connection hole, insertion hole, and the driving hole; and an adjustable device including a rod, a first spring, a second spring and at least one movable member, the rod passing through the connection hole, the first through hole, the insertion hole, the second through hole and ended in the driving hole, a fixing member connected to a first end of the rod and engaged with the connection hole to limit rotation of the rod relative to the first part, the at least one movable member received in the driving hole and movably connected to a second end of the rod, the first spring mounted on the rod and biased between the fixing member and a bottom of the connection hole, the second spring mounted on the rod and biased between the at least one movable member and a bottom of the driving hole, an engaging force between the first and second teeth being adjusted by moving the at least one movable member related to the rod.