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Predetermined Failure Mechanism in a Degradation System

a technology of failure mechanism and degradation system, which is applied in the direction of cutting machine, earthwork drilling and mining, etc., can solve the problems of holder assembly detachment, preservation of pick,

Inactive Publication Date: 2012-06-14
NOVATEK IP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005]The predetermined failure mechanism may comprise at least one shear pin that secures the holder assembly to the driving mechanism. The predetermined failure mechanism may also comprise at least one shear pin that attaches the pick to the holder assembly. The shear pin may fail when an extreme force is applied,

Problems solved by technology

The shear pin may fail when an extreme force is applied, this may result in preservation of the pick.
The holder as

Method used

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  • Predetermined Failure Mechanism in a Degradation System
  • Predetermined Failure Mechanism in a Degradation System
  • Predetermined Failure Mechanism in a Degradation System

Examples

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Embodiment Construction

[0020]FIG. 1 discloses an embodiment of a degradation system. The degradation system may be a milling machine 100. Tracks 101 are used to move the machine along a desired direction of travel. A driving mechanism may be situated on the underside of the milling machine 100 and may comprise a rotary degradation drum 102. The rotary degradation drum 102 may comprise multiple holder assemblies 103. Each holder assembly 103 may contain one or more picks 104. Each individual pick 104 may comprise a tip enhanced with a sintered polycrystalline diamond bonded to a cemented metal carbide substrate.

[0021]The rotary degradation drum 102 may be rotated by diesel engine 105, electric engine, hydraulic mechanism, or combinations thereof. The engine 105 may be found at the forward end of the machine 100. As the rotary degradation drum 102 rotates, the picks 104 may engage the formation 106 and degrade it into aggregate.

[0022]FIG. 2 discloses a shank of a pick 104 secured within a channel 201 of a h...

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PUM

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Abstract

In one aspect of the present invention, a degradation system comprises a driving mechanism. A holder assembly is connected to the driving mechanism. A pick is connected to both the driving mechanism and the holder assembly. At least one predetermined point of failure is configured in the holder assembly to dissipate the force on the pick when the tip of the pick is overloaded.

Description

BACKGROUND OF THE INVENTION[0001]The present invention relates generally to degradation machines, especially the type used to mill road structures. Degradation machines typically comprise a frame structure that supports a drum. Multiple holder assemblies, which support degradation picks, are attached to the drum. Man-holes or rail-road tracks are often buried underneath the surface of the road and will damage the picks if engaged at full speed. The prior art discloses mechanisms for protecting the picks.[0002]U.S. Pat. No. 6,364,420 to Sollami, which is herein incorporated for all that it contains, discloses an improved means for providing for breakage of inexpensive replaceable parts when road resurfacing equipment and mining equipment bits encounter very hard irregularities in the surface being milled or mined.BRIEF SUMMARY OF THE INVENTION[0003]In one aspect of the present invention, a degradation system comprises a driving mechanism. A holder assembly is connected to the driving...

Claims

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Application Information

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IPC IPC(8): E21C35/183
CPCE21C35/19
Inventor HALL, DAVID R.WAHLOUIST, DAVID
Owner NOVATEK IP