Title:
BUILT-IN TYPE ELECTRIC DRIVING SYSTEM OF MACHINE TOOL AND OPERATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2019/151708
Kind Code:
A1
Abstract:
The present invention relates to a built-in type electric driving system of a machine tool. The system may comprise: a housing; a hollow tube-shaped spindle extending in the forward/backward direction with respect to the housing and installed to be able to rotate with regard to the housing; a built-in motor comprising a stator fixed inside the housing and a rotor fixed to the outer surface of the spindle and generating a torque between the stator and the rotor by externally applied power to rotate the rotator; a chuck installed at the front end of the spindle and including a jaw for gripping an object to be processed; a drawbar installed inside the spindle to linearly move the forward/backward and having a front end connected to the jaw; a drawbar key and a drawbar key groove, which connect the drawbar to the chuck such that the drawbar can linearly move, but cannot rotationally move; a chuck locking unit for restricting or releasing a rotational movement of the chuck with regard to the housing; a clutch unit installed to move forward/backward between the front portion of the spindle and the rear portion of the chuck so as to restrict the spindle to the chuck or separate the spindle in a rotatable manner relative to the chuck; a leadscrew formed to be fixed to the drawbar and having a thread helically formed on the outer surface thereof; a driving unit fixed to the outer surface of the spindle so as to rotate together with the spindle; and a female screw cover coupled to the driving unit so as to rotate together with driving unit, and having a thread formed on the inner peripheral surface thereof so as to be screw-coupled to the thread of the leadscrew.
Inventors:
CHANG JUNGHWAN (KR)
YUN YONGSEON (KR)
KU BONSAENG (KR)
YUN YONGSEON (KR)
KU BONSAENG (KR)
Application Number:
PCT/KR2019/000973
Publication Date:
August 08, 2019
Filing Date:
January 23, 2019
Export Citation:
Assignee:
KHAN WORKHOLDING CO LTD (KR)
UNIV DONG A RES FOUND FOR IND ACAD COOP (KR)
UNIV DONG A RES FOUND FOR IND ACAD COOP (KR)
International Classes:
B23Q5/10; B23B31/02; B23Q1/00; B23Q5/56
Foreign References:
| KR20170121605A | 2017-11-02 | |||
| KR20160072569A | 2016-06-23 | |||
| JP2001009607A | 2001-01-16 | |||
| JP2003340617A | 2003-12-02 | |||
| JPH0724695A | 1995-01-27 |
Other References:
See also references of EP 3747592A4
Attorney, Agent or Firm:
OH, Wihwan (KR)
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