| 摘要 |
A bit holder assembly includes a socket with a sleeve movably mounted thereto and two springs are located between the socket and the sleeve. The two springs have two respective end sections which are engaged with two inclined slots defined in the wall of the socket. The two end sections protrude into ⅕ of the inner diameter of the socket. An inner spring is located in the socket. The axial height of the first slot is larger than or equal to the axial height of the notches of the bit, and the axial height of the second slot is larger than or equal to an axial height of the annular groove of the bit. An angle between the axis of the socket and the first and second slots is smaller than 60 degrees.
|
