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Track pin and bushing retention design for a track chain

A technology of crawler chain and bushing, applied in crawler vehicles, hand-held tools, transportation and packaging, etc., can solve problems such as high tensile residual stress and failure of crawler pads

Active Publication Date: 2020-09-25
CATERPILLAR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Expansion and welding operations can lead to defects in welded joints as well as high tensile residual stresses
These two factors may combine to cause weld cracking and inevitable track pad failure

Method used

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  • Track pin and bushing retention design for a track chain
  • Track pin and bushing retention design for a track chain
  • Track pin and bushing retention design for a track chain

Examples

Experimental program
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Embodiment Construction

[0016] Reference will now be made in detail to embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. In some instances, reference numerals will be indicated throughout the specification, and the drawings will show the reference numeral followed by a letter such as 100a, 100b, etc. FIG. It should be understood that the use of a letter immediately following a reference number indicates that these features have similar shape and function similarly to what is normally the case when the geometry is mirrored about a plane of symmetry. For ease of explanation in this specification, letters are generally not included herein, but may be shown in the drawings to indicate repetition of features discussed in this written specification.

[0017] Various embodiments of the invention include track pin bushing retention designs for tra...

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PUM

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Abstract

A track chain member (200) may comprise a shoe member (206), and a first rail member (204a) extending from the shoe member (206). The first rail member (204a) may include a first lug (208) defining afirst bore (210) defining a first longitudinal axis (L210) and including a first bushing retention shelf (212) disposed in the first bore (210), a second lug (214) including a second bushing retentionshelf (218) disposed in the second bore (216). A third lug (222) may extend in a direction opposite that of the first lug (208) and second lug (214) and may be disposed axially between the first lug(208) and the second lug (214).

Description

technical field [0001] The present invention relates to a track chain that uses pins and bushings to hold the track chain together while still allowing one track chain component, such as a track link or track pad, to rotate relative to another track link or track pad. Specifically, the present invention relates to pin and bushing retention designs for holding track chain components such as track shoes, track pads, or track links together, helping to prevent pins or bushings from falling out of the track chain components. Background technique [0002] In many current applications, track chain components such as track links, track pads, or track shoes are attached to each other using pins and bushings that allow the track chain components to rotate relative to each other while Allow the chain to remain tensioned while on the undercarriage of the vehicle. If the pins or bushings become loose or otherwise fall out of the holes of the track chain members, the track chain will fa...

Claims

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Application Information

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IPC IPC(8): B62D55/21
CPCB62D55/21B62D55/32B25B27/22B62D55/205
Inventor B·I·琼斯M·杜米特鲁
Owner CATERPILLAR INC