Title:
HYDRAULIC DRIVE DEVICE
Document Type and Number:
WIPO Patent Application WO/2024/043052
Kind Code:
A1
Abstract:
This hydraulic drive device (1) comprises a pump (21), an actuator (25), and a controller (40). The pump (21) discharges oil due to being rotationally driven by a power source (17). The capacity of the pump (21) can be changed. The actuator (25) is operated by being supplied with oil discharged by the pump (21). The controller (40) controls the capacity of the pump (21) in accordance with the operation specifics of the actuator (25). In accordance with the rotation speed (N) of the pump (21), the controller (40) changes an upper-limit value (R) of the magnitude of a pump capacity change amount (∆q), which is the amount of change per unit time in the capacity of the pump (21).
Inventors:
FUJITA YUICHIRO
KOURA HIROMITSU
UEDA KOJI
KOURA HIROMITSU
UEDA KOJI
Application Number:
PCT/JP2023/028730
Publication Date:
February 29, 2024
Filing Date:
August 07, 2023
Export Citation:
Assignee:
KOBELCO CONSTR MACH CO LTD (JP)
International Classes:
F15B11/00; E02F9/22; F15B11/02
Domestic Patent References:
| WO2020184606A1 | 2020-09-17 |
Attorney, Agent or Firm:
KOTANI, Masataka et al. (JP)
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