Electric tool and electric hammer special drill bit and straight shank drill bit integrated interchangeable locking device

Abstract

The invention discloses an electric tool and an electric hammer special drill bit and a straight shank drill integrated interchangeable locking device thereof. The electric hammer special drill and straight shank drill integrated interchangeable locking device includes: electric hammer special drill bit clamping and locking mechanism , including rotating sleeve, drill clamp main body, positioning beads, ferrules, spring fixing parts, drill clamp springs and positioning bead baffles; jaw locking mechanism, including ring gear and clamp jaws threaded with the ring gear, drill clamp main body There is an inclined slideway for the jaw to move, and the inclined slideway communicates with the fixed channel of the drill bit; the self-locking mechanism of the jaw is fixedly connected with the ring gear, and its end facing the ferrule has a positioning structure that cooperates with the ferrule; The ferrule suspension mechanism includes a self-locking position piece fixing frame set on the rotating sleeve, and an elastic positioning piece arranged on the self-locking position piece fixing frame. The ferrule has a locking groove and a pause groove that cooperate with the elastic positioning piece . The above-mentioned locking device improves the connection accuracy, solves the problem of wild matching, and improves the service life.

Description

technical field [0001] The invention relates to the technical field of electric tools, in particular to an electric tool and an electric hammer special drill bit and a straight shank drill bit integrated interchangeable locking device. Background technique [0002] Commonly used electric tools include electric drills using straight shank drill bits for drilling functions and electric hammer drills using construction drill bits for chiseling functions. Most electric hammer drills also have the function of electric drill, that is, when using its electric drill function, a drill chuck with a straight shank drill bit is installed on the electric tool body. At present, the common installation structures mainly include the following two types: [0003] Such as figure 1 As shown, in the first structure, the drill chuck is locked to the electric hammer SDS (SpecialDirect System, electric hammer drill clamping mode, with 4 tunnels and 5 tunnels design) device through the connecting...

AI Technical Summary

Problems solved by technology

However, it is composed of two structures arranged in the axial direction, the locking structure is complex and the distance between the jaws and the SDS locking mechanism is long. When clamping the special drill bit for electric hammer, only the drill bit below 13mm can be clamped. However, for the special drill bit for electric hammer above 13mm, there will be interference

like image 3 As shown, the distance between the jaws and the SDS locking mechanism is long, and the length of the connecting handle of the drill bit is constant, which makes the connecting shoulder of the connecting handle and the drill pipe interfere with it and cannot be used, and there is a problem of universal matching; and , during the operation of electric tools, it is very easy to generate vibration and make the jaws loose, and there is a short-term machine failure problem, which shortens the service life

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