# US 8,118,311 B2 · Clamping device

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- Number: US 8,118,311 B2
- Document ID: US8118311B2
- Status: Granted
- Kind: B2
- Application number: 12/097,907
- Filed: 2006-11-02
- Published: 2009-11-05
- Granted: 2012-02-21
- Earliest claimed: 2005-12-19
- Assignees: Schunk GmbH & Co. KG Spann-Und Greiftechnik
- Inventors: Thomas Retzbach; Michael Haag
- Web page: https://patentgrep.com/patent/US8118311B2

## CPC

- F16D 1/09: with radial clamping due to axial loading of at least one pair of conical surfaces {(tapered keys F16D1/0882)}
- B23B 31/117: Retention by friction only, e.g. using springs, resilient sleeves, tapers
- F16D 1/0829: {with radial loading of both hub and shaft by an intermediate ring or sleeve (F16D1/0817, F16D1/0823, F16D1/093 take precedence)}
- F16D 1/101: {without axial retaining means rotating with the coupling}
- Y10T 279/17179: Wedge
- Y10T 279/17316: Unitary
- Y10T 279/17418: Unitary
- Y10T 279/17521: Reciprocating cam sleeve
- Y10T 279/17965: Drill type
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- B23B: TURNING; BORING (arrangements for copying or controlling B23Q)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The invention relates to a clamping device with a base body (2) which comprises a central receptacle (5) for a component or tool to be clamped, in the base body (2) at least one groove (6) being formed which is open to a face side of the base body (2), and with at least one clamping wedge (9b) which can be pressed axially into the groove (6) from the open face side of the latter to radially deform an inner wall section (7) lying between the groove (6) and the receptacle, which is characterized in that the wall (10) which defines the groove (6) on the outside is designed to be elastic over at least an axial partial section such that it is elastically deformed to the outside when the at least one clamping wedge (9b) is pressed into the groove (6).

## Claims

### Claim 1

A clamping device with a base body (2) which comprises a central receptacle (5) for a component or tool to be clamped, in the base body (2) at least one groove (6) being formed which is open to a face side of the base body (2), and with at least one clamping wedge (9b) which can be pressed axially into the groove (6) from the open face side of the latter to radially deforming an inner wall section (7) lying between the groove (6) and the receptacle, wherein the wall (10) which defines the groove (6) on the outside is designed to be elastic over at least an axial partial section such that it is elastically deformed to the outside when the at least one clamping wedge (9b) is pressed into the groove (6), characterised in that in the base body (2) a number of grooves (6) are formed which are disposed, evenly distributed, about the receptacle (5), and that spaced apart evenly in the circumferential direction, a number of clamping wedges (9b) are provided on an annular body (9a) and project substantially axially from the latter.

### Claim 2 (depends on 1)

The clamping device according to claim 1, characterised in that in their central region, as viewed in the circumferential direction, the grooves (6) are connected to the receptacle (5) by narrow cuts (8) in the inner wall (7).

### Claim 3 (depends on 2)

The clamping device according to claim 2, characterised in that the contour of the grooves (6) is adapted to the contour of the clamping wedges (9b) so that the clamping wedges (9b) are positioned in the grooves (6).

### Claim 4 (depends on 1)

The clamping device according to claim 1, characterised in that a total of three clamping wedges (9b) are disposed, spaced apart evenly, on the annular body (9a).

### Claim 5 (depends on 1)

The clamping device according to claim 1, characterised in that the outer walls of the clamping wedges (9b) lie on a cone surface extending towards the free clamping wedge ends.

### Claim 6 (depends on 5)

The clamping device according to claim 5, characterised in that the outer walls of the grooves (6) are formed substantially complementarily to the outer walls of the clamping wedges (9b) and correspondingly extending in a cone shape in the insertion direction of the clamping wedges (9b).