Title:
CORE DRILLING MACHINE FOR 4-HOLE DRILLING
Document Type and Number:
WIPO Patent Application WO/2023/096173
Kind Code:
A1
Abstract:
A core drilling machine for 4-hole drilling, according to one embodiment of the present invention, comprises: a main body part; a lifting/lowering carriage mounted at the main body part so as to be liftable/lowerable; a motor coupled to one side surface of the lifting/lowering carriage; a fixed plate coupled to one side of the lower portion of the lifting/lowering carriage so as to rotatably support a driving shaft of the motor; a rotating plate fastened to the fixed plate by changing the rotational angle thereof; a driving pulley, which is coupled to the driving shaft and rotates; four driven pulleys rotatably mounted near the vertexes of the rotating plate; four driven shafts which pass through and are mounted at the rotating plate, and which are coupled to the four driven pulleys and rotate; a belt mounted between the driving pulley and the four driven pulleys so as to transmit the rotatory power of the driving pulley to the four driven pulleys; and four core bits coupled to the lower ends of the four driven shafts.
Inventors:
LEE CHAE MUN (KR)
Application Number:
PCT/KR2022/016211
Publication Date:
June 01, 2023
Filing Date:
October 23, 2022
Export Citation:
Assignee:
EGUN CO LTD (KR)
International Classes:
B28D1/14; B23B39/16; B23B51/04
Foreign References:
| JP2017104913A | 2017-06-15 | |||
| JP2001105211A | 2001-04-17 | |||
| JPH08318415A | 1996-12-03 | |||
| CN204747561U | 2015-11-11 | |||
| KR920008141Y1 | 1992-11-12 |
Attorney, Agent or Firm:
PARK, Jeong Hwan (KR)
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