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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2019/087962
Kind Code:
The present invention is provided with: left and right harnesses (26, 27) that connect between left and right rotation-speed sensors (24A, 24B) provided on an undercarriage (2) side and a controller (25) provided on an upper rotating body (3) side; an object to be detected (28) that is provided on the undercarriage (2); left and right rotation detecting sensors (29, 30) that are provided on the upper rotating body (3) and that detect the object to be detected (28); and a rotation control device (31) that stops a rotation operation of a rotation motor (10) when the left rotation detecting sensor (29) or the right rotation detecting sensor (30) detects the object to be detected (28) during rotation of the upper rotating body (3). The undercarriage (2) is provided with a carriage-side stopper (42), and the upper rotating body (3) is provided with a rotating-body-side stopper (43). After the rotation control device (31) stops the rotation operation of the rotation motor (10), the rotating-body-side stopper (43) abuts against the carriage-side stopper (42), thereby restricting inertial rotation of the upper rotating body (3).

YAMAMOTO Daisuke (1-2, Sasagaoka, Minakuchicho, Koka-sh, Shiga 61, 〒5280061, JP)
NAKATANI Kenichiro (1-2, Sasagaoka, Minakuchicho, Koka-sh, Shiga 61, 〒5280061, JP)
Application Number:
Publication Date:
May 09, 2019
Filing Date:
October 26, 2018
Export Citation:
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HITACHI CONSTRUCTION MACHINERY TIERRA CO., LTD. (1-2 Sasagaoka, Minakuchicho Koka-sh, Shiga 61, 〒5280061, JP)
International Classes:
B62D21/18; B66C23/94; E02F9/20
Foreign References:
Attorney, Agent or Firm:
HIROWA PATENT FIRM (4F. Nishishinjuku Koide Bldg, 1-3 Nishishinjuku 3-chome, Shinjuku-k, Tokyo 23, 〒1600023, JP)
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