# US 2014/0152074 A1 · Arrangment for fixing a cutter

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- Number: US 2014/0152074 A1
- Document ID: US20140152074A1
- Status: Published application
- Kind: A1
- Application number: 14/117,932
- Filed: 2012-05-03
- Published: 2014-06-05
- Earliest claimed: 2011-05-18
- Assignees: Sandvik Mining and Construction Oy
- Inventors: Roman Gerer; Raif Grief
- Web page: https://patentgrep.com/patent/US20140152074A1

## CPC

- E21C 35/197: using sleeves, rings or the like, as main fixing elements
- E21C: MINING OR QUARRYING

## Abstract

An arrangement for fixing a pick to a cutting tool of a cutting machine includes a pick holder and a rotationally symmetrical pick sleeve, which is detachably fixed against an axial stop by surface pressure in a conical receiving element of the pick holder. The pick sleeve has an axial length that is greater than the axial length of the receiving element of the pick sleeve. A part of the pick sleeve that protrudes with respect to the edge of the receiving element when fixed has, on the outer diameter thereof, a conical bevel, which is inclined inwards.

## Claims

### Claim 1

An arrangement for fixing a pick to a cutting tool of a cutting machine, comprising:
a pick holder; and
a rotationally symmetrical pick sleeve is detachably fixed against an axial stop by surface pressure in a conical receiving element of the pick holder, the pick sleeve having an axial length which is greater than an axial length of the receiving element of the pick sleeve, wherein a part of the pick sleeve protrudes with respect to an edge of the receiving element when fixed, the part exhibiting at its outer diameter a conical bevel which is inclined inwards.

### Claim 2 (depends on 1)

An arrangement for fixing of a pick according to claim 1, wherein an inclination angle of the bevel against a generating line of an outer casing of the pick sleeve is between 15° and 30°, preferably 23°.

### Claim 3 (depends on 1)

An arrangement for fixing of a pick according to claim 1, wherein the conical bevel begins at the position of the pick sleeve when it is in contact against the axial stop, directly at the edge of the receiving element.

### Claim 4 (depends on 1)

An arrangement for the fixing of a pick according to claim 1, wherein a surface pressure between the receiving element and the pick sleeve is constantly adjusted over the entire axial length of the receiving element, and amounts to at least 150 N/mm2.

### Claim 5 (depends on 1)

An arrangement for the fixing of a pick according to claim 1, wherein the pick holder includes a hole, opening into the receiving element, for the introduction of hydraulic oil.

### Claim 6 (depends on 1)

An arrangement for the fixing of a pick according to claim 1, wherein the pick sleeve is made of stainless steel, such as X17CrNi 16-2.

### Claim 7

A pick arrangement for a cutting tool of a cutting machine, comprising:
a pick; and
an arrangement for fixing the pick to a cutting tool including a pick holder and a rotationally symmetrical pick sleeve detachably fixed against an axial stop by surface pressure in a conical receiving element of the pick holder, the pick sleeve having an axial length that is greater than an axial length of the receiving element of the pick sleeve, wherein a part of the pick sleeve protrudes with respect to an edge of the receiving element when fixed, the part exhibiting at its outer diameter a conical bevel that is inclined inwards, the pick being in contact on a ring-shaped face surface of the pick sleeve with a ring-shaped contact surface formed at a ring connection, and the diameter of the ring connection does not exceed the outer diameter of the face surface.