Title:
HYDRAULIC PUMP
Document Type and Number:
Japanese Patent JP2022056963
Kind Code:
A
Abstract:
To provide a hydraulic pump capable of reducing pulsation of a discharge pressure and noise without using a solenoid on-off valve.SOLUTION: A hydraulic pump includes a valve plate 6 having a suction port 61 and a discharge port 62, a cylinder block sliding with the valve plate 6, a suction passage 71 communicated with the suction port 61, and a discharge passage 72 communicated with the discharge port 62. In the valve plate 6, a first dead center port 64 is formed in a downstream side of the suction port 61 and an upstream side of the discharge port 62 in a rotation direction of a cylinder block. The first dead center port 64 is connected with the suction passage by a first connection passage 91, and is connected with the discharge passage 72 by a second connection passage 93. A first check valve 92 and a second check valve 94 are respectively provided in the first connection passage 91 and the second connection passage 93.SELECTED DRAWING: Figure 2
Inventors:
KONDO TETSUHIRO
YOSHIMURA ISAMU
YOSHIMURA ISAMU
Application Number:
JP2020164978A
Publication Date:
April 11, 2022
Filing Date:
September 30, 2020
Export Citation:
Assignee:
KAWASAKI HEAVY IND LTD
International Classes:
F04B1/2042; F04B53/10
Attorney, Agent or Firm:
Aiko Patent Office, a patent business corporation
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