Title:
ROTARY HYDRAULIC PUMP AND TWO ROTOR TYPE ROTARY HYDRAULIC PUMP
Document Type and Number:
Japanese Patent JP2018155236
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a hydraulic pump for a hydraulic driving system provided with a hydraulic actuator which can prevent or reduce wear of a component part and has a simple structure.SOLUTION: A hydraulic pump RA is constituted by arranging a first pump P1 and a second pump P2 in a casing 1. The first pump P1 and the second pump P2 have a common rotary shaft 2. The first pump P1 includes a cylindrical member 3, an eccentric rotor 4, a floating ring 5, a needle bearing 6, first and second vanes 7,8 and first to fourth actuation water supply/discharge ports 9 to 12. The eccentric rotor 4 is attached to the rotary shaft 2 or is integrally formed eccentrically in a radial direction so as to have a center axis parallel to a rotary shaft center axis. The floating ring 5 is arranged on a cylinder hollow part and is fitted onto the eccentric rotor 4.SELECTED DRAWING: Figure 1
Inventors:
UENISHI YUKIO
Application Number:
JP2017075571A
Publication Date:
October 04, 2018
Filing Date:
March 17, 2017
Export Citation:
Assignee:
YUUTEKKU KK
International Classes:
F04C2/356; F04C15/00; F04C15/06