Apparatus and method for drilling a work
AssigneeHukuzo Yagishita
InventorHukuzo Yagishita
Life of this patent
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Abstract
An apparatus for drilling a workpiece has a shaft portion including a holder to hold a drilling tool rotating around a first axis. A reduction gear is connected to the shaft portion. A cylindrical member, including an outer cylinder and an inner cylinder, rotatably contains the shaft portion at an eccentric position. The cylindrical member is connected to the output shaft of the reduction gear and rotated around a second axis parallel to the first axis. A slide containing cylinder contains the shaft portion, the reduction gear and the cylindrical member. The slide containing cylinder has a sliding structure for axially moving the shaft portion, the reduction gear and the cylindrical member. A drilling tool is simultaneously rotated around the first axis, revolved around the second axis and is axially moved.
Claims12
An apparatus for drilling a workpiece comprising:
- a shaft portion including a holder for holding a drilling tool rotating around a first axis;
- a reduction gear connected to the shaft portion;
- a cylindrical member including an outer cylinder and an inner cylinder for rotatably containing the shaft portion at an eccentric position, said cylindrical member connected to an output shaft of the reduction gear and rotating around a second axis parallel to the first axis;
- a slide containing cylinder for containing the shaft portion, the reduction gear and the cylindrical member, said slide containing cylinder including a sliding structure for axially moving the shaft portion, the reduction gear and the cylindrical member;
- and
- the drilling tool rotating around the first axis while simultaneously revolving around the second axis and moving axially, the drilling tool rotated by the rotation of the shaft portion which, in turn, rotates the input shaft that simultaneously rotates the cylindrical member, connected to the output shaft of the reduction gear, around the second axis at a predetermined reduction ratio.
A method for drilling a workpiece comprising:
- providing a shaft portion including a holder for holding a drilling tool rotating around a first axis;
- a reduction gear connected to the shaft portion;
- a cylindrical member including an outer cylinder and an inner cylinder for rotatably containing the shaft portion at an eccentric position, said cylindrical member connected to an output shaft of the reduction gear and rotating around a second axis parallel to the first axis, a slide containing cylinder for containing the shaft portion, the reduction gear and the cylindrical member, said slide containing cylinder including a sliding structure for axially moving the shaft portion, the reduction gear and the cylindrical member;
- and
- drilling a workpiece while simultaneously rotating the drilling tool around the first axis, revolving the drilling tool around the second axis and axially moving the drilling tool;
- rotating the drilling tool by rotating the shaft portion and rotating the input shaft of the reduction gear;
- simultaneously rotating the cylindrical member, connected to the output shaft of the reduction gear, around the second axis at a predetermined reduction ratio.
Dependencies are inferred from the claim text.