Clamping system

• US 10,118,230 B2
• Filed: 10/07/2015
• Issued: 11/06/2018
• Est. Priority Date: 10/16/2014
• Status: Active Grant

• Current Assignee: Karl Schuessler GmbH & Co., KG
• Original Assignee: Karl Schuessler GmbH & Co., KG
• Inventors: Schuessler, Klaus
• Primary Examiner(s): Howell, Daniel
• Application Number:
  US15/518,003
• Publication Number:
  US 20170304912A1
• Time in Patent Office: 1,126 Days
• CPC Class Codes: B23B 2260/022 Balls
• CPC Class Codes: B23B 31/02 Chucks
• CPC Class Codes: B23B 31/028 the axial positioning of the tool being adjustable B23B31/208 takes precedence; with means for adjusting the chuck with respect to the working spindle B23B31/36
• CPC Class Codes: B23B 31/1075 Retention by screws
• CPC Class Codes: B27G 13/02 in the shape of long arbors, i.e. cylinder cutting blocks B27G13/12 takes precedence
• CPC Class Codes: Y10T 279/17821 Set screw
• CPC Class Codes: Y10T 409/30952 with cutter holder

Abstract

The invention relates relates to a clamping system for clamping an object (1), in particular for clamping a cutting tool in a machine tool, comprising an accommodating bore (4) for accommodating the object (1) to be clamped, a threaded bore, which extends in the wall of the accommodating bore (4) transversely to the longitudinal axis (12) of the accommodating bore (4), and a clamping screw (6), which can be screwed in the threaded bore in order to selectively clamp or release the object (1) in the accommodating bore (4) in accordance with the screwing position of the clamping screw (6). The invention further relates to an intermediate element (9), which is arranged between the clamping screw (6) and the object (1) such that the clamping screw (6) touches the object (1) to be clamped (1) not directly, but rather indirectly by means of the intermediate element (9). According to the invention, the threaded bore is preferably arranged eccentrically in relation to the accommodating bore (4).

Claims

1. A clamping system for clamping an object, comprising:

a) an accommodating bore for accommodating the object to be clamped;

b) a threaded bore which extends in a wall of the accommodating bore transversely to a longitudinal axis of the accommodating bore;

c) a clamping screw which is screwable in the threaded bore in order to optionally clamp or release the object dependent upon a screwed position of the clamping screw in the accommodating bore;

d) an intermediate element being arranged between the clamping screw and the object, so that the clamping screw does not directly touch the object to be clamped, but rather indirectly via the intermediate element; and

e) the threaded bore being arranged offset eccentrically to a diameter of the accommodating bore, wherein

the clamping screw has a cup socket at a free inserting end thereof, and

the intermediate element has, on a side of the clamping screw, a ball head which is mounted in the cup socket of the clamping screw, so that the intermediate element is pivotable relative to the clamping screw.

2. The clamping system according to claim 1, wherein

a) the intermediate element is pivotable in a first pivot plane relative to the clamping screw wherein the first pivot plane extends transversely to the accommodating bore, and

b) the intermediate element is pivotable in a second pivot plane relative to the clamping screw wherein the second pivot plane extends parallel to the accommodating bore.

3. The clamping system according to claim 1, wherein the intermediate element is pivotable in all directions relative to the clamping screw.

4. The clamping system according to claim 3, wherein

a) the intermediate element has a flattening on a side of the object to be clamped,

b) an outer surface of the object to be clamped has a flattening, and

c) in a clamped state of the object, the flattening on the intermediate element then lies in plane-parallel arrangement against the flattening on the object to be clamped.

5. The clamping system according to claim 4, wherein the flattening in the outer surface of the object to be clamped is inclined along the accommodating bore so that the object to be clamped widens along its flattening toward a free end thereof.

6. The clamping system according to claim 1, wherein the threaded bore extends in a plane which lies perpendicularly to the longitudinal axis of the accommodating bore.

7. The clamping system according to claim 6, wherein a longitudinal axis of the threaded bore does not intersect the longitudinal axis of the accommodating bore.

8. The clamping system according to claim 1, wherein perpendicular spacing between a longitudinal axis of the threaded bore and the diameter of the accommodating bore is greater than 1 mm and smaller than 5 mm.

9. The clamping system according to claim 1, wherein the clamping screw fixes the object to be clamped by use of the intermediate element against axial withdrawal from the accommodating bore.

10. The clamping system according to claim 1, wherein the clamping screw fixes the object to be clamped by use of the intermediate element against twisting about a longitudinal axis thereof.

11. The clamping system according to claim 1, wherein

a) the accommodating bore is substantially cylindrical, and

b) the intermediate element is made of a softer material than the object to be clamped, and

c) the intermediate element is made of a softer material than the clamping screw, and

d) the clamping screw, the intermediate element and the object to be clamped each consist of steel, and

e) the clamping screw is a setscrew.

12. A machine tool having a clamping system according to claim 1 for clamping a cutting tool.

13. The machine according to claim 12, wherein the machine is a milling machine and the cutting tool is a milling tool.