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Patent Searching and Data


Title:
WORK MACHINE
Document Type and Number:
WIPO Patent Application WO/2019/088065
Kind Code:
A1
Abstract:
A controller outputs a first speed (first limiting speed) as a limiting speed for a boom cylinder when a boom lowering control input is less than a first control input and outputs a second speed when the boom lowering control input is the first control input or greater. The first speed is set so as to decrease as the distance to the target face decreases. The second speed is defined as the weighted average of the first speed and a third speed (second limiting speed) that is set so as to change in accordance with one of the target face distance and the operating device boom lowering control input, where the weight of the first speed decreases and the weight of the third speed increases as the boom lowering control input increases.

Inventors:
IGARASHI Teruki (Hitachi Construction Machinery Co. Ltd., 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 〒3000013, JP)
IZUMI Shiho (Hitachi Construction Machinery Co. Ltd., 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 〒3000013, JP)
NARIKAWA Ryu (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
MEGURIYA Shuuichi (Hitachi Construction Machinery Co. Ltd., 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 〒3000013, JP)
TAKEUCHI Hiroki (Hitachi Construction Machinery Co. Ltd., 650, Kandatsumachi, Tsuchiura-sh, Ibaraki 13, 〒3000013, JP)
Application Number:
JP2018/040246
Publication Date:
May 09, 2019
Filing Date:
October 30, 2018
Export Citation:
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Assignee:
HITACHI CONSTRUCTION MACHINERY CO., LTD. (16-1, Higashiueno 2-chome Taito-k, Tokyo 15, 〒1100015, JP)
International Classes:
E02F9/22; E02F3/43; E02F9/20; E02F9/26
Attorney, Agent or Firm:
KAICHI IP (3-16, Nihonbashi-muromachi 4-chome Chuo-k, Tokyo 22, 〒1030022, JP)
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