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Title:
MAIN CYLINDER DEVICE, AND HYDRAULIC MACHINE FOR SAME
Document Type and Number:
WIPO Patent Application WO/2019/015609
Kind Code:
A1
Abstract:
A main cylinder device, comprising a main cylinder assembly (31) and piston rods (32) connected to the main cylinder assembly (31). The quantity of the piston rods (32) is at least two or at least two sets. A hydraulic cavity is formed between the piston rods (32) and the main cylinder assembly (31). The two or two sets of piston rods (32) are arranged in opposite directions and move along the same straight line. During operation, a volume change of the hydraulic cavity enables the two or two sets of piston rods (32) to approach or move away from each other. The invention further relates to a hydraulic machine comprising the main cylinder device. During a pressing operation, the two or two sets of piston rods (32) arranged oppositely move in reverse directions to effectively maintain a pressure balance of the piston rods and cancel the reaction forces of the piston rods, thus improving uniformity of a workpiece during the pressing operation.

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Inventors:
DONG XIANGYI (CN)
Application Number:
PCT/CN2018/096141
Publication Date:
January 24, 2019
Filing Date:
July 18, 2018
Export Citation:
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Assignee:
NINGBO DEMA INTELLIGENT MACHINERY CO LTD (CN)
DONG XIANGYI (CN)
International Classes:
B30B1/32
Domestic Patent References:
WO2013040872A12013-03-28
Foreign References:
CN204975954U2016-01-20
CN106286462A2017-01-04
CN2671786Y2005-01-19
Other References:
See also references of EP 3564024A4
Attorney, Agent or Firm:
HANGZHOU HUAJIN LIANZHE INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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