Title:
PINCHING DEVICE FOR WORK MACHINERY, AND WORK MACHINERY PROVIDED THEREWITH
Document Type and Number:
WIPO Patent Application WO/2018/051670
Kind Code:
A1
Abstract:
Provided is a device that makes it possible to accelerate a pinching operation with a high degree of freedom, without entailing significant pressure loss. A pinching device is provided with: a pinching device body (20) that includes a pair of pinching members and a switching drive actuator (28) and is set onto a distal end of a work arm; a main hydraulic pump (52) mounted onto a hull; a control valve (54); a bypass oil path (62) that bypasses the control valve (54) and communicates with one another a first and second port (30a, 30b) of the switching drive actuator (28); an oil path switching section (68) for opening and closing the bypass oil path (62); a check valve (66) provided to the bypass oil path (62); an auxiliary hydraulic pump (64) that supplies some of the hydraulic oil which is discharged from the first port (30a) in an opening operation of the pinching members to the second port (30b) via the bypass oil path (62); and an auxiliary hydraulic pump drive device (70) for driving the auxiliary hydraulic pump (64).
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Inventors:
TAKESHITA TATSUYA
Application Number:
PCT/JP2017/028336
Publication Date:
March 22, 2018
Filing Date:
August 04, 2017
Export Citation:
Assignee:
KOBELCO CONSTR MACH CO LTD (JP)
International Classes:
E04G23/08; E02F9/22; F15B11/02; F15B11/028
Domestic Patent References:
| WO2014073338A1 | 2014-05-15 |
Foreign References:
| JP2012002326A | 2012-01-05 | |||
| JP2007298073A | 2007-11-15 | |||
| US20130180395A1 | 2013-07-18 | |||
| US20100089045A1 | 2010-04-15 |
Attorney, Agent or Firm:
KOTANI, Etsuji et al. (JP)
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