Working machinery

The work machine stabilizes operations by maintaining a double-engaged clutch state and releasing service brakes, addressing operational instability caused by pressure oil competition, enhancing stability and quick transitions.

JP7872674B2Active Publication Date: 2026-06-10KOMATSU LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
KOMATSU LTD
Filing Date
2022-02-15
Publication Date
2026-06-10

AI Technical Summary

⚠Technical Problem

In work machines, the use of negative-type brakes for service brakes leads to competition for pressure oil when transitioning from a stopped state to a traveling state, resulting in operational instability.

⚗Method used

A work machine with a forward and reverse directional clutch, transmission, and left and right service brakes, where the controller maintains the engaged state of one speed clutch and engages another speed clutch after transitioning to a stopped state, while releasing the service brakes, creating a double-engaged state to stabilize operation.

🎯Benefits of technology

This configuration improves operational stability by preventing sliding and enabling quick transitions from a stopped to a traveling state without competing for hydraulic pressure, particularly during pivot turns.

✦ Generated by Eureka AI based on patent content.

Smart Images

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    Figure 1
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    Figure 3
Patent Text Reader

Abstract

To provide a work machine that can improve operation stability.SOLUTION: After recognizing that a bulldozer 1 is transferred from a first running state to a stopping state, a controller 100 generates a double engagement state by engaging a velocity-stage clutch 23c in an opened state in the running state while maintaining an engagement state of a velocity-stage clutch 23d in an engagement state in the running state, and releases left and right service brakes 50L and 50R by supplying hydraulic pressure to the brakes.SELECTED DRAWING: Figure 3
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