Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
MOTOR-MANIPULATED TYPE HYDRAULIC ACTUATOR UNIT AND HYDRAULIC FOUR-WHEEL DRIVE WORK VEHICLE
Document Type and Number:
WIPO Patent Application WO/2012/017831
Kind Code:
A1
Abstract:
Provided is a motor-manipulated type hydraulic actuator unit, wherein an electric motor the movement of which is controlled by a control device activates a capacity adjustment mechanism via a driving-side arm and a driven-side arm, and which is provided with a clutch mechanism that locks the rotation of the driven-side arm, by having a contact member pressed against a clutch case when force is applied to the driven-side arm by the capacity adjustment mechanism. The control device has the duty factors of first to fourth drive signals, which are to be outputted to the electric motor during a neutral-side starting period, a neutral-side normal activation period, a high-capacity side starting period, and a high-capacity side normal activation period of the capacity adjustment mechanism, respectively, made to be configurable, and the duty factors of the first and fourth drive signals are made to be greater than the duty factor of the second drive signal, the duty factor of the third drive signal is made to be greater than the duty factor of the fourth drive signal, and the added up value of the ON time of the third drive signal is made to be greater than the added up value of the ON time of the first drive signal.

Inventors:
KAMADA MINORU (JP)
ICHINOSE NOBUHIKO (JP)
Application Number:
PCT/JP2011/066568
Publication Date:
February 09, 2012
Filing Date:
July 21, 2011
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
KANZAKI KOKYUKOKI MFG CO LTD (JP)
KAMADA MINORU (JP)
ICHINOSE NOBUHIKO (JP)
International Classes:
F03C1/253; F16H61/425
Foreign References:
JP2730722B21998-03-25
JP2001059573A2001-03-06
JP2006070932A2006-03-16
JP2006322360A2006-11-30
JPS62237165A1987-10-17
Other References:
See also references of EP 2602478A4
Attorney, Agent or Firm:
SUZUKI Katsuhito et al. (JP)
Suzuki 活 people (JP)
Download PDF:
Claims: