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Locking and Expanding Pin

IP.com Disclosure Number: IPCOM000232444D
Publication Date: 2013-Nov-08
Document File: 5 page(s) / 263K

Publishing Venue

The IP.com Prior Art Database

Abstract

The present concept relates to an improved method of restoring tolerances in worn pinned joints and, more specifically, to worn pinned joints commonly found on the implements of work vehicles, such as blades and buckets. Moreover, it can be adapted to a multitude of applications wherein a hole and pin joint is subject to extreme wear.

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LOCKING AND EXPANDING PIN

Concept Summary:

The present concept relates to an improved method of restoring tolerances in worn pinned joints and, more specifically, to worn pinned joints commonly found on the implements of work vehicles, such as blades and buckets. Moreover, it can be adapted to a multitude of applications wherein a hole and pin joint is subject to extreme wear.

Background:

Construction vehicles such as Backhoes, Loaders, Excavators, Crawlers, Motor Graders, Skid Steers and other equipment used in earth-working tasks use hardened pins to couple pivotal components together. Over time, the once close tolerances provided when the equipment was new will become subject to wear affecting the hole diameter through which the hardened pin is inserted. Another cause is the pin rotating within the orifice in which it is inserted. The undesired loose-fitting joints will affect machine and operator performance, especially when a bulldozer blade is controlled by satellite and/or laser components implemented for facilitating precise finish grade results. Consequently, the problem is exacerbated depending on the number of pinned joints on a given machine.

To overcome the aforementioned problem, it is common to "true" the enlarged hole by drilling and inserting respective sized bushings. This process is laborious resulting in expensive down-time for the machine and lost productivity.

Concept Improvement:

For each joint, provided is the use of an expandable wedge o...