Cutter assembly with cutter device and method of assembling

Patent metadata

Field	Value
Publication number	US-10260340-B2
Application number	US-201515737996-A
Country	US
Kind code	B2
Filing date	Jun 22, 2015
Priority date	Jun 22, 2015
Publication date	Apr 16, 2019
Grant date	Apr 16, 2019

Abstract

A cutter assembly for an undercutting machine for cutting a rock workface and a method of assembling a cutter assembly is provided. The cutter assembly includes a shaft mountable on the machine with one end extending from the machine, and a cutter device arranged in connection to the extended end of the shaft. The cutter device is connected releasably and rotationally rigid to the shaft with a locking arrangement. The locking arrangement includes a first locking device arranged to transfer substantially axial loads, and a second locking device arranged to transfer substantially radial loads.

First claim

The invention claimed is:

1. A cutter assembly for an undercutting machine for cutting a rock workface, the cutter assembly comprising:
a shaft mountable on the machine with one end extending from the machine; and
a cutter device arranged in connection to the extended end of the shaft, wherein the cutter device is connected releasably and rotationally rigid to the shaft with a locking arrangement, wherein the locking arrangement includes a first locking device arranged to transfer substantially axial loads, and a second locking device arranged to transfer substantially radial loads.

2. The cutter assembly as claimed in claim 1 , wherein the first and second locking devices are radially spaced apart from each other.

3. The cutter assembly as claimed in claim 1 , wherein the second locking device is arranged to center the cutter device on the shaft and/or the first locking device is arranged to transfer bending moments.

4. The cutter assembly as claimed in claim 1 , wherein the first locking device includes one, two or more fastening elements for fastening the cutter device to the shaft.

5. The cutter assembly as claimed in claim 1 , wherein the second locking device includes a tapered locking assembly, including at least one fixing element for fixing a tapered outer surface and a tapered inner surface relative to each other.

6. The cutter assembly as claimed in claim 5 , wherein the tapered locking assembly includes a locking ring including the tapered outer surface.

7. The cutter assembly as claimed in claim 5 , wherein the tapered locking assembly includes a further locking ring including the tapered inner surface.

8. The cutter assembly as claimed in claim 5 , wherein the tapered inner surface is formed on the cutter device.

9. The cutter assembly as claimed in claim 1 , wherein the cutter device and the shaft contact each other in sections at a butt joint.

10. The cutter assembly as claimed in claim 1 , wherein a sealing carrier is releasably arranged on the shaft for carrying at least a part of a sealing arrangement.

11. The cutter assembly as claimed in claim 10 , wherein the sealing carrier is fixed rotationally rigid to the shaft.

12. The cutter assembly as claimed in claim 10 , wherein the sealing carrier is sealed against the shaft.

13. The cutter assembly as claimed in claim 1 , wherein the cutter device is a cantilevered cutter ring.

14. A cutter module comprising two or more cutter assemblies as claimed in claim 1 .

15. A method of assembling a cutter assembly for an undercutting machine for cutting a rock workface, the method comprising:
providing a cutter assembly, the cutter assembly including a shaft mountable on the machine with one end extending from the machine and a cutter device arranged in connection to the extended end of the shaft; and
connecting the cutter device releasably and rotationally rigid to the shaft with a locking arrangement, the locking arrangement including a first locking device arranged to transfer substantially axial loads, and a second locking device arranged to transfer substantially radial loads, by:
applying an initial tension to the second locking device;
applying an initial tension to the first locking device;
applying a target tension to the second locking device; and
applying a target tension to the first locking device.

Assignees

• Sandvik Intellectual Property

Inventors

• Ebner Bernhard
• Haberer Christoph

Classifications

• E21D9/117 Primary

  mounted for orientating or sideways shifting relative to the frame · CPC title

• E21C27/128

  with breaking-down members functioning on the slitting level · CPC title

• E21C25/16 Primary

  Machines slitting solely by one or more rotating saws, cutting discs, or wheels · CPC title

• E21C27/24 Primary

  by milling means acting on the full working face {, i.e. the rotary axis of the tool carrier being substantially parallel to the working face (similar machines for tunneling E21D9/1026)} · CPC title

• E21D9/104

  Cutting tool fixtures (devices with percussive tools E21D9/106) · CPC title