Drill chuck
The present invention provides a new drill chuck that resolves the problem that the excessive clamping force of the existing drill chuck makes it inconvenient to open the drill chuck and easily damages the cutters. The new drill chuck comprises a front-body, an after-body, and clamping jaws, wherein a thread is provided on the clamping jaw, the after-body is provided with master gears, slave gears are provided between the clamping jaws and the after-body, the master gear fits with the slave gear, a thread is provided inside the slave gear, and the thread of the slave gear fits with the thread of the clamping jaw.
1. A drill chuck comprising a front-body, an after-body, a front sleeve, a rear sleeve, and clamping jaws on which threads are provided, which is characterized in that:
said after-body is located in said front-body,
wherein said after-body is provided with a master gear, a slave gear is provided between said clamping jaws and said after-body,
wherein said master gear fits with said slave gear, a thread is provided inside said slave gear, and the thread of said slave gear fits with the thread of said clamping jaw,
wherein said clamping jaw is provided with a positioning ball groove, a positioning ball is provided inside said positioning ball groove, and said positioning ball is fixed inside the front-body; and
wherein said rear sleeve forms a relatively fixed connection with said after-body.
2. The drill chuck according to claim 1 ,
wherein at least one rolling bearing is provided between said front-body and said after-body.
3. The drill chuck according to claim 2 ,
wherein a partition is provided on said front-body.
4. The drill chuck according to claim 1 ,
wherein a ring oil sump is provided on said front-body.
5. The drill chuck according to claim 1 ,
wherein at least one rolling bearing is provided between said front-body and said after-body.