Fast clamping drill chuck

Abstract

The invention provides a fast clamping drill chuck. Through the fast clamping drill chuck, the technical problem of low work efficiency of an existing drill chuck is solved. The fast clamping drill chuck comprises a drill body, clamping jaws, a nut, a steel ball, a clamp spring and a rear cover. The clamping jaws are correspondingly arranged in drill body grooves distributed in the drill body evenly in the circumferential direction. The rear end of the drill body is fixed to the rear cover through the clamp spring. The outer circle of the front end of the drill body is provided with a drill body thread. The nut is in threaded connection with the drill body through the drill body thread. The inner wall of the nut is provided with a groove. The two sides of the groove are arranged to be a nut clamping locating face and a nut loosening locating face correspondingly. The nut loosening locating face protrudes from the inner wall of the nut and is perpendicular to the inner wall of the nut.The two side faces of the front end of each clamping jaw are arranged to be a clamping jaw clamping locating face and a clamping jaw loosening locating face correspondingly, wherein the front end of the clamping jaw is arranged in the groove of the nut through the clamping jaw clamping locating face and the clamping jaw loosening locating face. The fast clamping drill chuck can be widely applied to the technical field of drilling tools.

Description

technical field

[0001] The invention relates to the technical field of drilling tools, in particular to a quick clamping drill chuck. Background technique

[0002] Drill chuck is one of the important drilling accessories in the electric tool industry and machine tool industry. It is widely used in electric hand drills, drilling machines, etc., and is matched with electric drills. The collet is generally composed of a drill body, jaws, nuts, and a jacket. The jaws are respectively installed in three equally divided oblique holes of the main body, and the nut is installed in the nut groove of the main body. The threads of the nut and the jaws form a thread transmission, which can Do helical motion to achieve the working state of clamping and loosening; however, when the drill chuck is working, in order to ensure the clamping performance, the pitch of the jaws and the nut is relatively small, resulting in the operation from the maximum clamping range to the minimum clamping Wh...

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