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Seal assembly and crawler-track connection structure

a technology of crawler track and connection structure, which is applied in the direction of engine seals, mechanical equipment, engine components, etc., can solve problems such as reducing productivity, and achieve the effects of improving durability, stable sealing effect, and improving quality of crawler track

Inactive Publication Date: 2005-04-21
KOMATSU LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008] The present invention is made to solve the above-described problems with the conventional case. Accordingly, an object of the invention is to provide a seal assembly that has a simple assembly structure and that provides secure sealing effects. Another object of the invention is to provide a crawler-track connection structure that allows the seal assembly to be easily mounted, and in addition, that securely prevents overflow of a lubricant and the like to the outside.

Problems solved by technology

In addition, since the seal assembly 95 must be inserted in the space portions 94, the overall assembly requires complicated steps, thereby reducing the productivity.

Method used

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  • Seal assembly and crawler-track connection structure
  • Seal assembly and crawler-track connection structure
  • Seal assembly and crawler-track connection structure

Examples

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Embodiment Construction

[0041] Hereinbelow, referring to the accompanying drawings, practical embodiments of the present invention will be described in detail. FIGS. 1A and 1B are essential-portion cross-sectional views of an embodiment of a seal assembly according to the present invention. A seal assembly S is used for, for example, a crawler-track connection structure. The seal assembly S has a pair of seal rings 1 and 1 and load seal ring 2 disposed between the seal rings 1 and 1, and each of the seal rings 1 and 1 is supported by a support ring 3 that has an L-shaped cross section. In the cross-sectional view, the seal assembly S is formed symmetric with respect to a radial line passing the center of the assembly S. The crawler-track connection structure is intended for use in a traveling crawler of a crawler vehicle, such as a construction machine, e.g., a bulldozer tractor or a hydraulic shovel tractor.

[0042] As shown in FIG. 2, the above-described connection structure connects links 5 and 5 in a st...

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PUM

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Abstract

A seal assembly has simple assembly structures, and provides secure sealing effects. A crawler-track connection structure allows the seal assembly to be easily mounted, and securely prevents overflow of a lubricant and the like to the outside. A pair of seal rings (1) and (1) individually having lip portions (23) and (23) are disposed such that each of the lip portions (23) and (23) protrudes in a direction opposing an axial direction, and a load seal ring (2) is compressed and inserted between the pair of seal rings (1) and (1). The load seal ring (2) exerts reaction forces on the pair of lip portions (23) and (23) outwardly in the axial direction.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a seal assembly and a crawler-track connection structure. [0003] 2. Description of the Related Art [0004] Generally, as shown in FIG. 6, a crawler vehicle such as a construction machine, e.g., a bulldozer tractor or a hydraulic shovel tractor, has an endless link chain 81 and a plurality of ground-contacting shoe plates (not shown) mounted on the link chain 81. The link chain 81 comprises a plurality of links 82a, . . . and 82b, . . . that are disposed parallel to each other, and a crawler-track connection Structure 84 for pivotably connecting the links 82a and 82b opposing each other. Specifically, the links 82a and 82b comprise an intermediate portion 85 where the shoe plates (not shown) are mounted, and connecting portions 86 and 87 protruding from the intermediate portion 85. A pin insertion opening 88 is provided in the connecting portion 86, and a bushing insertion opening 89 i...

Claims

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Application Information

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IPC IPC(8): F16J15/34
CPCF16J15/3456F16J15/344
Inventor YAMAMOTO, TEIJIHASHIMOTO, AKIRANAKAISHI, HIROYUKI
Owner KOMATSU LTD