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Traveling device for construction machine

A technology for construction machinery and driving devices, which is applied to mechanical equipment, engine seals, motor vehicles, etc., and can solve problems such as oil leakage, lubricating oil leakage, and inability to properly lubricate the deceleration mechanism for a long time

Inactive Publication Date: 2019-04-26
NIHON KENKI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the O-ring deviates from the predetermined position, and the surface pressure of the sliding contact surface of each seal ring becomes uneven, resulting in oil leakage.
As a result, the lubricating oil sealed in the rotating side housing leaks to the outside due to the floating seal, and the reduction mechanism cannot be properly lubricated for a long period of time, and the reliability of the overall reduction gear may decrease.

Method used

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  • Traveling device for construction machine
  • Traveling device for construction machine
  • Traveling device for construction machine

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0027] Hereinafter, embodiments of the construction machine traveling device of the present invention will be described in detail with reference to the drawings. Figure 1 to Figure 5 The first embodiment of the present invention is shown, and a traveling device of a hydraulic excavator is exemplified as a traveling device of a construction machine.

[0028] In the figure, a hydraulic excavator 1 is a representative example of construction machinery. The vehicle body of the hydraulic excavator 1 includes: a crawler-type undercarriage 2 capable of self-propelling; Rotary body 3. On the front side of the upper slewing body 3 , a working device 4 is provided in a pitch-movable manner, and the hydraulic excavator 1 uses the working device 4 to perform excavation work such as earth and sand.

[0029] The undercarriage 2 includes: a body frame 5 having left and right side frames 5A (only the left side in the drawing) extending in the front and rear directions; device 9; and the fl...

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PUM

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Abstract

A labyrinth (32) is provided in the gap (22) between the stationary end surface (13E) of a stationary housing (13) and the rotating end surface (15C) of a rotating housing (15). The labyrinth (32) comprises a stationary recess (13F), a stationary fitting protrusion (13G), a rotating fitting protrusion (15D), and a rotating recess (15E). The stationary recess (13F) and the rotating recess (15E) arerespectively provided with first and second fabric-like members (33, 34) formed annularly from a fabric-like material. A grease containing space (35) filled with grease (G) is provided between the first fabric-like member (33) and the second fabric-like member (34).

Description

technical field [0001] The present invention relates to traveling devices used in construction machines such as hydraulic excavators, hydraulic cranes, wheel loaders, and dump trucks. Background technique [0002] Generally, the lower traveling body of a crawler-type construction machine such as a hydraulic excavator includes: a vehicle frame with left and right side frames; a traveling device arranged at one end of each side frame; a floating wheel; and a track wound on a drive wheel (sprocket) and floating wheel provided on a traveling device. [0003] A traveling device of a hydraulic excavator generally includes a hydraulic motor serving as a source of rotation, and a speed reduction device that decelerates and outputs the rotation of the hydraulic motor. The reduction gear transmission includes a fixed-side housing that accommodates a rotation source, and a rotation-side housing that is rotatable with respect to the fixed-side housing and driven by the rotation source....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/16B62D55/125F16C33/78F16C33/80F16J15/18F16J15/24F16J15/447B62D55/15
CPCB62D55/125B62D55/15F16C33/7886F16C33/805F16C2326/20F16J15/3404F16J15/344F16J15/40F16J15/4476B60Y2200/25B60Y2200/41E02F9/02
Inventor 岩波友彦益田勇人
Owner NIHON KENKI CO LTD