Title:
HYDRAULIC MOTOR CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/112164
Kind Code:
A1
Abstract:
Rather than exhibiting a relief function when the hydraulic motor exceeds a specified maximum operation pressure, the hydraulic motor control device keeps the operation pressure from exceeding the maximum operation pressure, thereby stabilizing the operation of the hydraulic motor and keeping wasted energy loss to a minimum. Pressure sensors (29a, 29b) are provided respectively on the inlet and outlet ports (23a, 23b) of a hydraulic motor (23). Of the respective inlet and outlet ports (23a, 23b), the pressure of the port with the higher pressure is detected. If said pressure exceeds the maximum operation pressure, tangential velocity is detected using a gyrosensor (31), the necessary flow rate Qm = ν∙V∙(60/360∙103) for the swiveling motor (23) is computed by a controller (30), and pressure oil at the necessary flow rate is supplied to the swiveling motor by driving a pump regulator (21) of a variable capacity hydraulic pump (20).
More Like This:
| JPS5560770 | DIRECTION CONTROL VALVE |
| JP2006194273 | FLUID PRESSURE CONTROL DEVICE |
| JP2000274401 | WASTE OIL DRAIN DEVICE FOR HYDRAULIC EXCAVATOR |
Inventors:
TANAKA HIROYOSHI (JP)
Application Number:
PCT/JP2013/077807
Publication Date:
July 24, 2014
Filing Date:
October 11, 2013
Export Citation:
Assignee:
HITACHI CONSTRUCTION MACHINERY (JP)
International Classes:
F15B11/00; E02F9/22; F15B11/02
Foreign References:
| JP2011196439A | 2011-10-06 | |||
| JP2011208790A | 2011-10-20 | |||
| JP2012127154A | 2012-07-05 | |||
| JP3015060B2 | 2000-02-28 |
Attorney, Agent or Firm:
The Patent Body Corporate TAKEWA INTERNATIONAL PATENT OFFICE (JP)
Patent business corporation Takekazu international patent firm (JP)
Patent business corporation Takekazu international patent firm (JP)
Download PDF:
Previous Patent: MULTI-DISK TRANSMISSION
Next Patent: HEAT-CURABLE COMPOSITION AND LAMINATED STRUCTURE
Next Patent: HEAT-CURABLE COMPOSITION AND LAMINATED STRUCTURE