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Title:
SINGLE-CYLINDER LATCH-TYPE TELESCOPIC CYLINDER, TELESCOPIC BOOM, AND CONSTRUCTION MACHINERY APPARATUS
Document Type and Number:
WIPO Patent Application WO/2019/148390
Kind Code:
A1
Abstract:
Provided is a single-cylinder latch-type telescopic cylinder, comprising a piston rod (1) and a cylinder barrel (2). The piston rod (1) or the cylinder barrel (2) is provided with a first cylinder head (3), a second cylinder head (6), a cylinder pin driving mechanism and a dovetail groove driving mechanism. A cylinder pin (5) of the first cylinder head (3) and a cylinder pin (8) of the second cylinder head (6) are both driven by the cylinder pin driving mechanism. A dovetail groove (4) of the first cylinder head (3) and a dovetail groove (7) of the second cylinder head (6) are both driven by the dovetail groove driving mechanism. According to the single-cylinder latch-type telescopic cylinder, the cylinder pin (5) of the first cylinder head (3) and the cylinder pin (8) of the second cylinder head (6) are both driven by the cylinder pin driving mechanism, and the dovetail groove (4) of the first cylinder head (3) and the dovetail groove (7) of the second cylinder head (6) are both driven by the dovetail groove driving mechanism, so as to achieve the motion synchronization of the cylinder pins and the motion synchronization of the dovetail grooves and reduce the number of driving components and sensors, thereby reducing the machining cost of the telescopic cylinder and also improving the reliability and the maintainability of the telescopic cylinder. A telescopic boom comprising the single-cylinder latch-type telescopic cylinder is provided. A construction machinery apparatus comprising the telescopic boom is also provided.

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Inventors:
DONG, Quan (No. 165 Tongshan Road, Xuzhou City, Jiangsu 4, 221004, CN)
TONG, Meng (No. 165 Tongshan Road, Xuzhou City, Jiangsu 4, 221004, CN)
ZHANG, Xin (No. 165 Tongshan Road, Xuzhou City, Jiangsu 4, 221004, CN)
XIANG, Xiaoqiang (No. 165 Tongshan Road, Xuzhou City, Jiangsu 4, 221004, CN)
CUI, Xiangpo (No. 165 Tongshan Road, Xuzhou City, Jiangsu 4, 221004, CN)
SANG, Ru (No. 165 Tongshan Road, Xuzhou City, Jiangsu 4, 221004, CN)
Application Number:
CN2018/074813
Publication Date:
August 08, 2019
Filing Date:
January 31, 2018
Export Citation:
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Assignee:
XUZHOU HEAVY MACHINERY CO., LTD. (No. 165 Tongshan Road, Xuzhou City, Jiangsu 4, 221004, CN)
International Classes:
F15B15/16; B66C23/693
Foreign References:
CN103603844A2014-02-26
CN103407912A2013-11-27
EP3040304A12016-07-06
CN202054553U2011-11-30
EP0943580A21999-09-22
CN102556858A2012-07-11
CN105179374A2015-12-23
CN106365055A2017-02-01
GB201304306D02013-04-24
CN202867390U2013-04-10
Attorney, Agent or Firm:
CCPIT PATENT AND TRADEMARK LAW OFFICE (8th Floor, Vantone New World Plaza2 Fuchengmenwai Street, Xicheng District, Beijing 7, 100037, CN)
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