# US 2014/0154021 A1 · Clamping device for portable boring machine and portable air-drive-drilling machine with clamping device

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- Number: US 2014/0154021 A1
- Document ID: US20140154021A1
- Status: Published application
- Kind: A1
- Application number: 14/097,639
- Filed: 2013-12-05
- Published: 2014-06-05
- Earliest claimed: 2012-12-05
- Assignees: Sugino Machine Limited
- Applicants: Sugino Machine Limited
- Inventors: Minoru IHARA; Hideki UCHIUZO
- Web page: https://patentgrep.com/patent/US20140154021A1

## CPC

- B23B 45/003: {Attachments}
- B23B 31/20125: {Axially fixed cam, moving jaws}
- B23B 47/28: Drill jigs for workpieces (equipment for setting or guiding the drill B23B49/00)
- B23B 2215/04: Aircraft components
- B23B 2247/04: Jigs using one or more holes as datums for drilling further holes
- B23B 2247/12: Drilling jigs with means to affix the jig to the workpiece
- Y10T 408/557: Frictionally engaging sides of opening in work
- Y10T 408/563: Work-gripping clamp
- B23B: TURNING; BORING (arrangements for copying or controlling B23Q)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A clamping device is attached to a front part of a body of a boring machine for clamping the boring machine and a workpiece together. The clamping device comprises a fixed piston fixed on the front part of the body, a movable piston equipped over the front part of the body movably in the axial direction of a spindle of the boring machine, a first pressure chamber, a second pressure chamber, a pressurized fluid-supply device to supply pressurized air to the first pressure chamber and the second pressure chamber so that the movable cylinder is moved in the axial direction, a connecting mechanism an end portion of which is connected to the movable cylinder, and a clamping unit which is connected to the other end portion of the connecting mechanism, and is fixed to a certain position of the workpiece.

## Claims

### Claim 1

A clamping device for a portable boring machine, the clamping device being mounted on a front part of a body of the portable boring machine and being for clamping the portable boring machine and a workpiece together, comprising:
a fixed piston fixed on an outer periphery of the front part of the body;
a movable cylinder covering the fixed piston, the movable cylinder being movable in an axial direction of a spindle of the portable boring machine;
a first pressure chamber and a second pressure chamber which are formed in an inside of the movable cylinder and face each other across the fixed piston in a front-rear direction;
a fluid supply device capable of supplying pressurized fluid into each of the first pressure chamber and the second pressure chamber to move the movable cylinder in the axial direction;
a connecting mechanism an end portion of which is connected to the movable cylinder; and
a clamping unit connected to the other end portion of the connecting mechanism, the clamping unit being capable of being fixed to a certain position of the workpiece,
wherein the connecting mechanism connects the movable cylinder and the clamping unit so as to move together with the movable cylinder in the axial direction, and
wherein the clamping device moves the clamping unit in a direction for clamping and moves the clamping unit in the reverse direction for unclamping through the movable cylinder and the connecting mechanism, using the fluid supply device.

### Claim 2 (depends on 1)

The clamping device for a portable boring machine according to claim 1, further comprising a guide member for supporting the clamping unit so as to be able to move the clamping unit in the orthogonal direction orthogonal to the axial direction,
wherein the connecting mechanism is formed of a link mechanism, and is rotatable around a shaft lengthened in the axial direction relatively to the movable cylinder.

### Claim 3 (depends on 2)

The clamping device for a portable boring machine according to claim 2, wherein the clamping unit comprises
a clamping collet to be inserted into a hole of the workpiece formed by the portable boring machine, and to be held at the position of the hole of the workpiece;
a mandrel to be slidably inserted into the clamping collet, and the mandrel being fixed to the other end portion of the connecting mechanism;
a spring urging the clamping collet in a forward direction relatively to the mandrel; and
a collet guide disposed to be incapable of moving in the axial direction, and the collet guide guiding the clamping collet slidably in the axial direction and regulating the movement of the clamping collet at a predetermined position in the axial direction.

### Claim 4 (depends on 3)

The clamping device for a portable boring machine according to claim 3, wherein the guide member supports the collet guide so that the collet guide can freely move in the orthogonal direction.

### Claim 5 (depends on 1)

A portable air-drive-drilling machine with a clamping device, comprising the boring machine and the clamping device according to claim 1,
wherein the boring machine is a drilling machine to be driven by pressurized air, and the pressurized fluid is pressurized air, and
wherein a clamping button and a start button are independently provided, the clamping button actuating the clamping device for clamping, and the start button actuating the drilling machine for boring.

### Claim 6 (depends on 2)

A portable air-drive-drilling machine with a clamping device, comprising the boring machine and the clamping device according to claim 2,
wherein the boring machine is a drilling machine to be driven by pressurized air, and the pressurized fluid is pressurized air, and
wherein a clamping button and a start button are independently provided, the clamping button actuating the clamping device for clamping, and the start button actuating the drilling machine for boring.

### Claim 7 (depends on 3)

A portable air-drive-drilling machine with a clamping device, comprising the boring machine and the clamping device according to claim 3,
wherein the boring machine is a drilling machine to be driven by pressurized air, and the pressurized fluid is pressurized air, and
wherein a clamping button and a start button are independently provided, the clamping button actuating the clamping device for clamping, and the start button actuating the drilling machine for boring.

### Claim 8 (depends on 4)

A portable air-drive-drilling machine with a clamping device, comprising the boring machine and the clamping device according to claim 4,
wherein the boring machine is a drilling machine to be driven by pressurized air, and the pressurized fluid is pressurized air, and
wherein a clamping button and a start button are independently provided, the clamping button actuating the clamping device for clamping, and the start button actuating the drilling machine for boring.