Tool for breaking hammer, breaking hammer, and use thereof
AssigneeSandvik Mining and Construction Oy
InventorOssi Kahra
Life of this patent
Estimating the term…
Abstract
The invention relates to a tool for a breaking hammer, a breaking hammer, and the use of a breaking hammer. The breaking hammer includes a percussion device, the percussion piston of which providing impacts to the tool for breaking rock. An impact surface of the tool has a curved form surface that has a radius of curvature and a center axis on the longitudinal axis of the tool. The direction of the centre axis is transverse to the plane through the longitudinal axis of the boom of a work machine.
Claims9
A breaking hammer tool that is an elongated piece, the tool comprising:
- a first head equipped with a tip;
- a second head equipped with an impact surface arranged to receive impact pulses from a percussion piston of a breaking hammer;
- and
- at least one fastening surface, wherein the impact surface includes at least one curved form surface, the curved form surface having at least one centre axis and being curved only in relation to the at least one centre axis, wherein the curved surface differs from a spherical surface, the curved form surface having a radius of curvature that is bigger than a length of the tool.
A breaking hammer comprising:
- a body;
- a connection part for connecting the breaking hammer to a boom of a work machine, whereby the breaking hammer is parallel to the boom;
- a percussion device including a percussion piston arranged to move back and forth between an impact direction and a return direction for generating impact pulses;
- a tool located in front of the percussion piston, as seen in the impact direction, the tool including an impact surface for receiving the impact pulses of the percussion piston;
- and
- fastening members for detachably fastening the tool to the body, the fastening members permitting restricted axial movement of the tool but preventing rotation of the tool about its longitudinal axis, wherein the impact surface of the tool has at least one curved form surface having at least one centre axis, the curved form surface of the tool being curved only in relation to the at least one centre axis, whereby it wherein the at least one curved surface differs from a spherical surface, the curved form surface having a radius of curvature that is bigger than a length of the tool.
A method of using a breaking hammer, comprising the steps of:
- using the breaking hammer to excavate a rock cavern, the breaking hammer comprising a body;
- a connection part for connecting the breaking hammer to a boom of a work machine, wherein the breaking hammer is parallel to the boom;
- a percussion including a percussion piston arranged to move back and forth between an impact direction and a return direction for generating impact pulses;
- a tool located in front of the percussion piston, as seen in the impact direction, the tool including an impact surface for receiving the impact pulses of the percussion piston;
- and fastening members for detachably fastening the tool to the body, the fastening members permitting restricted axial movement of the tool but preventing rotation of the tool about its longitudinal axis, wherein the impact surface of the tool has at least one curved form surface having at least one centre axis, the curved form surface of the tool being curved only in relation to the at least one centre axis, wherein the at least one curved surface differs from a spherical surface, the curved form surface having a radius of curvature that is bigger than a length of the tool;
- using the breaking hammer horizontally;
- and
- providing impacts with the percussion piston of the breaking hammer to a curved impact surface on the tool.
Dependencies are inferred from the claim text.