Vacuum locking device for umbrella-shaped drill bit

Abstract

The invention discloses a vacuum locking device for an umbrella-shaped drill bit. The vacuum locking device consists of a bottom plate, wherein a circular ring slot is formed in a position, around theperiphery, of the bottom plate; the cross section of the circular ring slot is L-shaped; a group of circular hole slots is formed in positions, around the periphery, of the flat bottom surface of thecircular ring slot; the circular hole slots are adhered with magnetic sheets which attract magnetic rings; the magnetic rings are adhered on the bottoms of circular ring bottom plates; the circular ring bottom plates are fixedly connected with an umbrella-shaped fixed cover; the bottom of the umbrella-shaped fixed cover is in the shape of a lower circle; the top of the umbrella-shaped fixed coveris in the shape of an upper circle; the diameter of the upper circle is greater than that of the lower circle; the wall of the umbrella-shaped fixed cover is provided with wrinkles; the top of the umbrella-shaped fixed cover is covered with an open wrinkled circular ring; the umbrella-shaped drill bit is arranged in the umbrella-shaped fixed cover; the pointed end on the top of the umbrella-shaped drill bit is inserted into a raised edge of the open wrinkled circular ring; and the umbrella-shaped drill bit is fixedly connected with a drill rod. The vacuum locking device is used for vacuum locking of the umbrella-shaped drill bit.

Description

Technical field: [0001] The invention relates to a vacuum locking device for an umbrella drill bit. Background technique: [0002] There is a tip at the top of the cutting edge of the umbrella-shaped drill bit. Vacuum packaging with an ordinary vacuum locking device will sometimes damage the tip of the cutting edge, and the cutting edge of the umbrella-shaped drill bit is also facing outwards. It is also easy to scratch the plastic packaging bag, and the effect of vacuum packaging is not ideal. Invention content: [0003] The object of the present invention is to provide a vacuum locking device for an umbrella drill that can safely wrap the umbrella drill. [0004] Above-mentioned purpose realizes by following technical scheme: [0005] A kind of vacuum locking device of umbrella drill bit, its composition comprises: base plate, described base plate has annular groove around the circumference, and the cross section of described annular groove is L-shaped, and the flat bo...

AI Technical Summary

Problems solved by technology

[0002] There is a tip at the top of the cutting edge of the umbrella-shaped drill bit. Vacuum packaging with an ordinary vacuum locking device will sometimes damage the tip of the cutting edge, and the cutting edge of the umbrella-shaped drill bit is also facing outwards. It is also easy to scratch the plastic packaging bag, and the effect of vacuum packaging is not ideal

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