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US 11,846,190 B2Granted
Rock cutting device
AssigneeJoy Global Underground Mining LLC
InventorsPeter A. Lugg, Geoffrey W. Keech
Life of this patent
Estimating the term…
Abstract
A rock excavating device includes a shaft and a cutting element. The shaft includes a first portion and a second portion connected to an end of the first portion. The first portion is rotatable about a first axis. The second portion extends along a second axis that is oblique with respect to the first axis. The cutting element includes a cutting edge. The cutting element is supported on the second portion and rotatable about the second axis. Rotation of the first portion of the shaft about the first axis changes the orientation of the second axis and the cutting element.
Claims25
A rock excavating device comprising:
- a shaft including a first portion and a second portion connected to an end of the first portion, the first portion supported for rotation about a first axis, the second portion extending along a second axis that is oblique with respect to the first axis;
- a cutting element supported on the second portion of the shaft and rotatable about the second axis, the cutting element including a cutting edge having a leading portion and a trailing portion, the cutting edge rotatable in a rotation plane perpendicular to the second axis, the leading portion configured to engage a rock surface, the trailing portion configured to be spaced apart from the rock surface, rotation of the first portion of the shaft about the first axis changing the orientation of the second axis and the orientation of the leading portion, the cutting element being a cutting disc and the cutting edge having a round shape, the first axis and the second axis intersecting one another at a center of a plane formed by a plurality of cutting bits;
- and
- an eccentric mass positioned adjacent the first portion of the shaft, the eccentric mass driven to rotate about an exciter axis, rotation of the eccentric mass inducing an oscillation of the shaft and the cutting element.
1 more element
A cutting assembly for a rock excavation machine, the cutting assembly comprising:
- a boom;
- and
- a cutting device supported on the boom, the cutting device including,
- a shaft including a first portion and a second portion connected to an end of the first portion, the first portion supported for rotation about a first axis, the second portion extending along a second axis that is oblique with respect to the first axis,
- a cutting element supported on the second portion of the shaft and rotatable about the second axis, the cutting element including a cutting edge having a leading portion and a trailing portion, the cutting edge rotatable in a rotation plane perpendicular to the second axis, the leading portion configured to engage a rock surface, the trailing portion configured to be spaced apart from the rock surface, rotation of the first portion of the shaft about the first axis changing the orientation of the second axis and the orientation of the leading portion, and
- an eccentric mass positioned adjacent the first portion of the shaft, the eccentric mass driven to rotate about an exciter axis, rotation of the eccentric mass inducing an oscillation of the shaft and the cutting element,
- wherein the cutting element is a cutting disc and the cutting edge has a round shape, wherein the first axis and the second axis intersect one another at a center of a plane formed by a plurality of cutting bits.
4 more elements
A rock excavating device comprising:
- a shaft including a first portion and a second portion connected to an end of the first portion, the first portion supported for rotation about a first axis, the second portion extending along a second axis that is oblique with respect to the first axis;
- a cutting element supported on the second portion of the shaft and rotatable about the second axis, the cutting element including a cutting edge having a leading portion and a trailing portion, the cutting edge rotatable in a rotation plane perpendicular to the second axis, the leading portion configured to engage a rock surface, the trailing portion configured to be spaced apart from the rock surface, rotation of the first portion of the shaft about the first axis changing the orientation of the second axis and the orientation of the leading portion;
- and
- an eccentric mass positioned adjacent the first portion of the shaft, the eccentric mass driven to rotate about an exciter axis, rotation of the eccentric mass inducing an oscillation of the shaft and the cutting element,
- wherein reaction forces exerted on the cutting edge due to impact with a rock surface are configured to induce a moment driving rotation of the first portion of the shaft about the first axis, thereby re-orienting the leading portion of the cutting edge to engage the rock surface.
2 more elements
Dependencies are inferred from the claim text.