Title:
SHOVEL AND SHOVEL CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2014/097689
Kind Code:
A1
Abstract:
This shovel, that digs according to arm digging operations that include arm closing operations, comprises: a digging operation detecting unit (300) to detect that arm digging operations are performed; a position detecting unit (301) to detect the position of the shovel; a maximum allowable pressure calculating unit (302) to calculate, as a second maximum allowable pressure (PAMAX), on the basis of the shovel position, the pressure of a bottom-side oil chamber (8B) of an arm cylinder (8) corresponding to the reactive force of digging when the shovel is dragged due to the reactive force of digging; and an arm cylinder pressure control unit (304) to control the pressure of the bottom-side oil chamber (8B) of the arm cylinder (8) so as not to exceed the second maximum allowable pressure (PAMAX) when performing arm digging operations.
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Inventors:
TSUKAMOTO HIROYUKI (JP)
Application Number:
PCT/JP2013/074285
Publication Date:
June 26, 2014
Filing Date:
September 09, 2013
Export Citation:
Assignee:
SUMITOMO SHI CONSTR MACH CO (JP)
International Classes:
E02F9/22; E02F9/20
Domestic Patent References:
| WO2010101233A1 | 2010-09-10 | |||
| WO2012121253A1 | 2012-09-13 |
Foreign References:
| JPH11324002A | 1999-11-26 | |||
| JPS6286234A | 1987-04-20 | |||
| JPS544402A | 1979-01-13 | |||
| JPS5178506A | 1976-07-08 | |||
| JPS50139410U | 1975-11-17 | |||
| JPS646420A | 1989-01-11 |
Other References:
See also references of EP 2937473A4
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
Tadashige Ito (JP)
Tadashige Ito (JP)
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