Chuck

Abstract

The invention relates to a chuck. The chuck is used for containing and clamping an external insert. The chuck comprises a spindle, locking pieces and a locking nut. The spindle is provided with an inner cavity used for containing a working head and formed axially, and containing grooves communicated with the inner cavity radially are formed in the spindle. The locking pieces are contained in the containing grooves and can move in the radial direction of the spindle. The spindle is sleeved with the locking unit, the locking nut is spirally connected with the spindle in a matched mode, the inner wall of the locking nut is provided with a compressing face in the axial direction of the spindle, the compressing face forces the locking pieces to move radially when the locking nut is screwed in the axial direction of the spindle, and the compressing face is separated from the locking pieces when the locking nut is unscrewed. When the chuck clamps the working head, the locking nut is screwed to directly act on the locking pieces, the locking pieces press the working head, the clamping structure is simple, the force transmission structure is simple, and clamping is reliable.

Description

technical field [0001] The invention relates to a collet, in particular to a collet for clamping a working head used on electric wood milling, drilling and other power tools. Background technique [0002] figure 1 A conventional power tool collet is disclosed, including a spindle 910 with a collet 920 sheathed therein. The collet 920 has an inner hole for accommodating a clamping sleeve 930, and the clamping sleeve 930 is used to clamp a working head, such as a milling cutter of an electric wood milling tool. A locking nut 940 is provided outside the collet 920 . When the working head needs to be installed, put the working head into the clamping sleeve 930, then tighten the locking nut 940, the locking nut 940 shrinks the inner hole of the collet 920, and then makes the inner hole of the clamping sleeve 930 smaller , and then clamp the working head. [0003] The disadvantage of the above collet is that the clamping structure is composed of the spring collet 920, the clam...

AI Technical Summary

Problems solved by technology

[0003] The disadvantage of the above collet is that the clamping structure is composed of the spring collet 920, the clamping sleeve 930 and the lock nut 940, resulting in complex structure of parts, many installation procedures, and the deviation of shape and position tolerance due to the installation of multiple parts As a result, the center of gravity deviates, resulting in vibration; in addition, the clamping process of the above-mentioned chuck is a process of transmitting the clamping force layer by layer, but due to the manufacturing error of the parts and the rigidity of the parts, the matching gap between the parts and the working head will be inconsistent, which is more important. The reason is that the clamping is not tight because the rigidity of the part is difficult to deform.

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