Improved drill bit fastening device for drilling machine

Abstract

The invention discloses an improved drill bit fastening device for a drilling machine. The improved drill bit fastening device comprises an outer jacket (1) and an inner jacket (5), wherein steel ball slide slots (6) are formed in the inner circular surface of the outer jacket (1); another group of steel ball slide slots (6) which correspond to the outer jacket (1) is formed in the outer circular surface of the inner jacket (5); the inner jacket (5) is mounted inside the outer jacket (1); a plurality of rows of steel balls (7) are mounted among the two groups of steel ball slide slots (6); the steel balls (7) are fixedly connected through sets (8); a group of main flow tubes (10) is arranged inside the inner jacket (5); flow-distributing tubes (11) and branch tubes (12) which communicate with the main flow tubes (10) are arranged inside the inner jacket (5); a group of screwing-pressing tube bodies (13) is fixedly arranged in front of the inner jacket (5); a screwing-pressing region (14) is arranged inside each screwing-pressing tube body (13); and the screwing-pressing regions (14) communicate with the flow-distributing tubes (11).

Description

technical field [0001] The invention relates to an improved drill bit fastening device of a drilling machine. Background technique [0002] At present, drilling machines are more and more widely used in construction, home decoration and other industries. When drilling, drilling machines need to replace drill bits of different lengths according to the depth of the hole; Driven by the rotation, the eccentric phenomenon of the drill bit often occurs because the drill bit is too long and only fixed at the end, resulting in a deflection of the hole, which seriously affects the work quality and work efficiency. Contents of the invention [0003] The object of the present invention is to provide an improved drill bit fastening device of a drilling machine to solve the problems raised in the above-mentioned background technology. [0004] To achieve the above object, the present invention provides the following technical solutions: [0005] An improved drill bit fastening device...

AI Technical Summary

Problems solved by technology

[0002] At present, drilling machines are more and more widely used in construction, home decoration and other industries. When drilling, drilling machines need to replace drill bits of different lengths according to the depth of the hole; Driven by the rotation, the eccentric phenomenon of the drill bit often occurs because the drill bit is too long and only fixed at the end, resulting in a deflection of the hole, which seriously affects the work quality and work efficiency

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