Improved drill bit fastening device for drilling machine
A fastening device and drilling machine technology, applied in the direction of tool joints, etc., can solve the problems that affect the work quality and work efficiency, the drill bit is too long, the drill bit is eccentric, etc., and achieve the effect of improving work quality and work efficiency and ensuring accuracy
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[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
[0019] See Figure 1-4 , An embodiment provided by the present invention: an improved drill bit fastening device of a drilling machine, comprising an outer jacket 1 and an inner jacket 5, the inner circular surface of the outer jacket 1 is provided with a steel ball slide groove 6, The outer circular surface of the inner jacket 5 is provided with another set of steel ball slide grooves 6 corresponding to the outer jacket 1. The inner jac...
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