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Patent Searching and Data


Title:
THREE-SECTION LINEAR ACTUATOR AND DRIVE ASSEMBLY THEREOF
Document Type and Number:
WIPO Patent Application WO/2017/143708
Kind Code:
A1
Abstract:
Provided are a three-section linear actuator and a drive assembly thereof. The three-section linear actuator comprises the drive assembly and a three-section tubular lifting column (8, 9, 10). A hollow lead screw (1) and a driving tube (4) of the drive assembly are fitted around an inner lead screw (6); an outer tube (3) is fitted around the driving tube (4); the hollow lead screw (1) is inserted in a hollow lead screw nut (2); the inner lead screw (6) is inserted in an inner lead screw nut (7); the hollow lead screw nut (2) and a fixing seat (5) are respectively fixed at two ends of the outer tube (3); the hollow lead screw (1) and the driving tube (4) rotate synchronously; the inner lead screw nut (7) can be rotationally arranged in the fixing seat (5) and is fixedly connected to the lower end of the driving tube (4); the bottom of the fixing seat (5) of the drive assembly is fixed on a first end plate (9-1) at the lower end of an intermediate tubular column (9); and the fixing seat (5) may partially or totally enter an inner tubular column (8). In the present invention, the drive assembly is an independent assembly module and features a compact structure and good adaptability; at the same time, the actuator can save as much axial space as possible within the three-section tubular lifting column, providing a larger height adjustment range.

Inventors:
ZHU GENGXING (CN)
YAO BUTANG (CN)
Application Number:
CN2016/086996
Publication Date:
August 31, 2017
Filing Date:
June 24, 2016
Export Citation:
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Assignee:
CHANGZHOU KAIDI ELECTRICAL INC (CN)
International Classes:
F16H25/20; A47B9/04; B66F3/10
Foreign References:
CN105565200A2016-05-11
CN205397978U2016-07-27
CN201087122Y2008-07-16
US20030183027A12003-10-02
DE3910814A11990-10-11
CN1784937A2006-06-07
CN102667247A2012-09-12
Attorney, Agent or Firm:
CHINA CHANGZHOU VEI PATENT OFFICE (CN)
常州市维益专利事务所 (CN)
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