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Patent Searching and Data


Title:
PISTON PUMP AND PISTON MOTOR
Document Type and Number:
WIPO Patent Application WO/2020/029899
Kind Code:
A1
Abstract:
A piston pump and a piston motor. The piston pump comprises a cylinder (2), a piston (3), a main shaft (1), an end cover (6), and an oil distribution mechanism. The oil distribution mechanism comprises an oil suction mechanism and an oil discharging mechanism. A roller (32) is mounted on the piston (3), and the roller (32) is rotatably connected to the piston (3). The main shaft (1) is further provided with a drive wheel (4). The drive wheel (4) engages with the main shaft (1), or is integrally formed with the main shaft (1). The drive wheel (4) is provided with a drive slot (41). A roller path surface of the drive slot (41) is a curved surface. The size of the drive slot (41) is adapted to an outer diameter of the roller (32). In the piston pump, the cylinder and the piston no longer rotate, thereby reducing moment of inertia and facilitating starting. A support tooth reduces a lateral force between a sliding engaging surface of the piston and a cylinder bore, and eliminates rotation of the piston, thereby improving reliability of the product.

Inventors:
ZHU DEWEI (CN)
Application Number:
PCT/CN2019/099161
Publication Date:
February 13, 2020
Filing Date:
August 05, 2019
Export Citation:
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Assignee:
QINGDAO ACME INNOVATION TECH CO LTD (CN)
International Classes:
F04B41/00; F04B1/04
Foreign References:
CN102155367A2011-08-17
CN110230583A2019-09-13
CN204082463U2015-01-07
JP2000027754A2000-01-25
CN205918785U2017-02-01
JP2002227761A2002-08-14
Other References:
See also references of EP 3812588A4
Attorney, Agent or Firm:
QINGDAO FIRST PATENT & TRADEMARK AGENT CO., LTD. (CN)
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