Excavator teeth

Inactive Publication Date: 2007-03-08
CQMS PTY LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the various components wear, the locking pins can loosen thereby increasing the risk of loss of a digging point or an entire digging tooth assembly.
Despite many prior art attempts to improve the mounting of an adaptor to a nose, most of these proposals suffer from one or more deficiencies.
Because the tongues themselves are unsupported, they possess a limited capacity to resist rotational moment forces.
Because the side tongues are recessed to accommodate the side rail portions, the robustness of the side tongues is somewhat compromised
This structure is heavily reliant on the locking pin to resist rotational moment forces however it is considered that this configuration may be prone to failure in the rear portion of the adaptor.
While adequ

Method used

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Examples

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Example

DETAILED DESCRIPTION OF THE DRAWINGS

[0059] In the accompanying drawings, for the sake of clarity, like reference numerals are employed for like features where appropriate.

[0060] In FIG. 1, the mounting nose 1 is shown as integrally formed with a cutting lip 2 of an excavation device such as a dragline bucket or the like (not shown).

[0061] Nose 1 includes a pair of opposed tapered forwardly convergent side faces 3, a front face 4 and upper and lower faces 5,6 converging towards front face 4. Upper and lower faces 5, 6 each include planar rear bearing faces 7 and planar forward bearing faces 8 separated by a tapered generally planar intermediate face 9. Rear bearing faces 7, forward bearing faces 8 and front bearing faces 10 are all shown as shaded regions for the sake of clarity. Side faces 3 may be tapered at an angle of from 8° to 15° degrees relative to a longitudinal axis X of the mounting nose. Preferably, side faces 3 are tapered at about 11° to longitudinal axis X.

[0062] R...

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PUM

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Abstract

An excavator tooth system having a mounting nose having a projecting spigot and a wear member (12) having at one end a socket (18), the socket (18) being defined by spaced side walls and upper and lower walls converging from a rearwardly facing socket opening to a forward end of the socket. Each of the upper and lower walls comprises a forward bearing face (8a) and a rear bearing face (7a) separated by a forwardly convergent intermediate face. The front and rear bearing faces (8a,7a) are substantially parallel to a longitudinal axis (50) of the wear member and engage corresponding bearing faces (8,7) in said spigot.

Description

CROSS-REFERENCE TO RELATED APPLICATION [0001] This application is a continuation-in-part of pending U.S. application Ser. No 10 / 707,290, filed Dec. 3, 2003.FIELD OF THE INVENTION [0002] This invention is concerned with improvements in excavator teeth for earth excavating devices. [0003] The invention is concerned particularly, although not exclusively, with the mounting of excavator teeth adaptors to adaptor noses on an excavating device such as an excavator bucket or the like. BACKGROUND OF THE INVENTION [0004] Excavating teeth mounted to the digging edge of excavator buckets and the like generally comprise a replaceable digging point, an adaptor body and an adaptor nose which is secured by welding to or is otherwise integrally formed with the digging edge of an excavator bucket. The adaptor has a socket-like recess at its rear end to receivably locate a front spigot portion of the adaptor nose and a locking pin extends through aligned apertures in the adaptor and nose to retain th...

Claims

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Application Information

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IPC IPC(8): E02F9/28
CPCE02F9/2825E02F9/2883E02F9/2833
InventorMEYERS, THOMAS ANTHONYLESLIE, BRUCE ALEXANDERDE WIT, JOHN ROBERT
OwnerCQMS PTY LTD