公开(公告)号：US20200224388A1

公开(公告)日：2020-07-16

申请号：US15758059

申请日：2017-06-27

Applicant: KOMATSU LTD.

Inventor： Takeo YAMADA ,  Shota NAKAMURA ,  Gousuke NAKASHIMA

IPC: E02F9/22 ,  E02F9/16 ,  E02F3/32 ,  E02F3/42 ,  F15B13/06

Abstract: A plurality of electromagnetic proportional control valves are configured to control a pressure of a pilot oil generated by operation of a first control lever device and a second control lever device and, in accordance with the pressure of the pilot oil, adjust a flow rate of a hydraulic oil supplied to hydraulic cylinders. The plurality of electromagnetic proportional control valves are divided into a first valve block including at least one of the electromagnetic proportional control valves and a second valve block including at least one of the electromagnetic proportional control valves. The first valve block and the second valve block are arranged to be separated from each other.

公开(公告)号：US20190027820A1

公开(公告)日：2019-01-24

申请号：US15757677

申请日：2017-06-26

Applicant: KOMATSU LTD.

Inventor： Takeo YAMADA ,  Hiroshi ABE ,  Ryosuke OKUI ,  Gousuke NAKASHIMA

IPC: H01Q1/32 ,  E02F9/26 ,  E02F9/08

Abstract: A hydraulic excavator includes: a vehicular body; a cab placed on the vehicular body; and a plurality of antennas for receiving satellite positioning signals, the plurality of antennas including a main antenna and a sub-antenna. The main antenna is attached to the cab. The sub-antenna is attached to the vehicular body without the cab being interposed.

公开(公告)号：US20190078302A1

公开(公告)日：2019-03-14

申请号：US15757107

申请日：2017-07-13

Applicant: KOMATSU LTD.

Inventor： Takeo YAMADA ,  Ryosuke OKUI ,  Gousuke NAKASHIMA

IPC: E02F9/26 ,  E02F3/32 ,  E02F3/43

CPC classification number: E02F9/265 ,  E02F3/283 ,  E02F3/32 ,  E02F3/43 ,  E02F3/439 ,  E02F9/2004 ,  E02F9/262 ,  E02F9/264

Abstract: A boom is attached to a body. A boom pin supports the boom while being swingable with respect to the body. A through-hole is made in the body. The through-hole is made such that a member (for example, the boom pin or a boom angle detector) that recognizes a position of the boom pin can be observed through the through-hole from a side of a hydraulic excavator.

公开(公告)号：US20190024344A1

公开(公告)日：2019-01-24

申请号：US15757678

申请日：2017-07-13

Applicant: KOMATSU LTD.

Inventor： Ryosuke OKUI ,  Takeo YAMADA ,  Gousuke NAKASHIMA

IPC: E02F9/26 ,  G01B11/26

Abstract: A measuring jig is attached to an antenna support member of a revolving unit, and used to measure a slewing position of the revolving unit together with an external measurement apparatus. The measuring jig includes a prism mirror and an attachment member. The prism mirror reflects projection light from the external measurement apparatus. The attachment member attaches the prism mirror to the antenna support member. The attachment member is configured to be attached to the antenna support member by sandwiching an attached portion.