Core drill having function for one-touch locking core bit

Abstract

The present invention relates to a core drill having a function for one-touch locking a core bit and, more particularly, to a new concept technology that automatically maintains locking and conveniently releases the locking when assembling a core bit and a reduction gear unit. A conventionally disclosed core drill does not have a separate locking function in the state in which a core bit and a reduction gear unit are assembled to each other, which causes a problem in which movement of the core bit or the reduction gear unit occurs or the core bit and the reduction gear unit are separated from each other during an operation. In order to solve this problem, the present invention provides a technology that allows locking to be automatically maintained when a reduction gear connector coupled to a core bit is inserted into a connection hole formed through a spindle in the state in which the locking is released by pressing a lock pin elastically installed in a lock housing fitted on the outside of the spindle and then the lock pin is released.

Description

technical field [0001] The present invention relates to a new concept technology that automatically maintains locking and can be easily released when assembling a core bit and a reducer unit. Background technique [0002] Generally, a core drill (core drill) rotates a cylindrical core bit to penetrate concrete structures, rocks, etc., or obtain test objects for strength tests from concrete structures, etc. It includes: an electric motor set in the drill body; a reducer connected with the shaft of the electric motor; a rotating shaft connected with the reducer; and a cylindrical drill combined with the front of the rotating shaft. [0003] If the perforation work is carried out on a perforation object such as a concrete structure, the above-mentioned conventional core drilling machine realizes the perforation operation by frictionally contacting the high-speed rotating core bit with the perforation object. If the perforation operation is realized, it will take a long time to...

AI Technical Summary

Problems solved by technology

[0003] If the perforation work is carried out on a perforation object such as a concrete structure, the above-mentioned conventional core drilling machine realizes the perforation operation by frictionally contacting the high-speed rotating core bit with the perforation object. If the perforation operation is realized, it will take a long time to perforate objects with high strength such as mortar concrete or reinforced concrete, which will cause a lot of time loss

[0004] Therefore, the operator needs to apply force to the core drilling machine toward the side to be pierced to perform work. In this case, the physical fatigue of the operator increases, and there is a problem that the work efficiency decreases.

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