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Patent Searching and Data


Title:
CONSTRUCTION MACHINE
Document Type and Number:
WIPO Patent Application WO/2018/043217
Kind Code:
A1
Abstract:
Provided is a construction machine in which a simple configuration can be used to inexpensively implement the switching of modes related to the speed of a travel motor, and the switching of modes related to priority levels for the supply of operating oil between actuators. A hydraulic shovel 10 is provided with: a first actuator 11 and a second actuator 12 which are driven by operating oil from a hydraulic source 13; a priority mode control unit 19 which controls priority levels related to the supply amounts of the operating oil between the first actuator 11 and the second actuator 12; a travel mode control unit 52 which controls the speed of a travel motor; and a first mode switching valve 33a for controlling the pilot pressure oil supplied to the priority mode control unit 19 and the travel mode control unit 52. A first pilot pressure oil supply circuit 21 and a second pilot pressure oil supply circuit 22 include a common pilot pressure oil circuit 23 which is connected to the mode switching valve.

Inventors:
IWASAKI Hitoshi (NABTESCO CORPORATION 1617-1, Fukuyoshidai 1-chome, Nishi-ku, Kobe-sh, Hyogo 13, 〒6512413, JP)
ABE Akinori (NABTESCO CORPORATION 1617-1, Fukuyoshidai 1-chome, Nishi-ku, Kobe-sh, Hyogo 13, 〒6512413, JP)
Application Number:
JP2017/029988
Publication Date:
March 08, 2018
Filing Date:
August 22, 2017
Export Citation:
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Assignee:
NABTESCO CORPORATION (7-9 Hirakawacho 2-chome, Chiyoda-ku Tokyo, 93, 〒1020093, JP)
International Classes:
E02F9/22; F15B11/08; F15B11/16
Attorney, Agent or Firm:
NAGAI Hiroshi et al. (Kyowa Patent & Law Office, Nippon Life Marunouchi Building 1-6-6, Marunouchi, Chiyoda-k, Tokyo 05, 〒1000005, JP)
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