US 2023/0141146 A1 · PORTABLE ELECTRICAL DRILLING ASSEMBLY WITH REVERSIBLY COUPLED SPLINED SHAFT

Abstract

A portable electrical drilling assembly includes an electric motor rotating a gear contained within a gear box housing, a connector reversibly coupling the gear to a splined shaft with the splined shaft extending within and engaging an internal surface of a cutter or reamer with the shaft and cutter/reamer defining a cutter-spline drive, a pivoting power feed mechanism coupled to the gear box housing, and a spindle coupled to the feed mechanism for receiving the cutter or reamer. The gear rotation rotates the splined shaft and reamer/cutter to drill/ream a hole, with the pivoting of the power feed mechanism controlling the depth of the drilled or reamed hole. The separate coupling of the splined shaft and cutter/reamer and interchangeability of cutters/reamers allows the assembly to be used in a confined space while still achieving deep drilling of holes in workpieces. The cutter-spline drive can be used in other drilling assemblies.

Claims24

Dependent claims

A portable electrical drilling assembly configured for drilling holes in a surface of a workpiece, said drilling assembly comprising:

a gear box comprising one or more gears;
a feed mechanism coupled to said gear box and movable relative to said gear box between a plurality of positions including a raised position and a lowered position;
a spindle coupled to said feed assembly and configured to move rectilinearly toward or away from the surface of the workpiece as said feed mechanism moves between said plurality of positions;
a cutting component coupled to said spindle;
and
a splined shaft having a length between a first end and a second end with said first end reversibly coupled to one of said gears and with said second end coupled to one or both of said cutting component and said spindle.

3 more elements

A method for drilling holes in a surface of a workpiece, said method comprising said steps of:

positioning a drilling assembly onto the workpiece at a desired position, the drilling assembly including a gear box having one or more gears with a motor coupled to the one or more gears, a feed mechanism coupled to the gear box and movable relative to the gear box between a plurality of positions including a raised position and a lowered position, and a spindle coupled to the feed mechanism;
providing a splined shaft extending in length between a first end and a second end;
reversibly coupling the first end of the splined shaft to the one or more gears;
positioning the feed mechanism in the raised position;
coupling a cutting component to one of the splined shaft or the spindle;
moving the feed mechanism to an intermediate position from the raised position to position a tip end of the cutting component in contact with a surface of the workpiece;
activating the motor to rotate the one or more gears, wherein the rotation of the one or more gears rotates the splined shaft, the cutting component and the spindle;
and
drilling a hole of a predetermined length in the workpiece by moving the feed mechanism from the intermediate position to the lowered position with the motor activated.

6 more elements

Dependencies are inferred from the claim text.

Portable electrical drilling assembly with reversibly coupled splined shaft

Life of this patent

Portable electrical drilling assembly with reversibly coupled splined shaft

Life of this patent

Abstract

Claims24