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Title:
EXPANSION SCREW
Document Type and Number:
WIPO Patent Application WO/2019/041616
Kind Code:
A1
Abstract:
An expansion screw, comprising an expansion plate (1), a movable support screw rod (2) and a fixed ejection piece (3), wherein the movable support screw rod (2) comprises a U-shaped support portion (21) and a screw rod portion (22); a first U-shaped groove (23) is formed on the U-shaped support portion (21); the fixed ejection piece (3) comprises an ejection rod portion (31) and a fixed support portion (32); the fixed support portion (32) forms a second U-shaped groove (33); the second U-shaped groove (33) of the fixed ejection piece (3) passes through the first U-shaped groove (23) of the movable support screw rod (2) to be sheathed on the first U-shaped groove (23), so that the screw rod portion (22) is positioned in the second U-shaped groove (33), and the ejection rod portion (31) is positioned in the first U-shaped groove (23); the lower portion of the screw rod portion (22) is sheathed with a flat gasket (4); and a nut (5) is mounted under the flat gasket (4). When a load is increased, the movable support screw rod is pulled outwards, and the ejection rod portion pushes inwards; in such a way, the expansion plate is expanded gradually, and the expansion screw is fixed firmly.

Inventors:
DENG, Xiaoming (Team 5, Village Committee Wugu, Jind, Zhaoqing Guangdong 8, 526108, CN)
Application Number:
CN2017/114424
Publication Date:
March 07, 2019
Filing Date:
December 04, 2017
Export Citation:
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Assignee:
DENG, Xiaoming (Team 5, Village Committee Wugu, Jind, Zhaoqing Guangdong 8, 526108, CN)
International Classes:
F16B13/08
Foreign References:
CN206694372U2017-12-01
CN202768570U2013-03-06
CN106884836A2017-06-23
CN205977947U2017-02-22
CN2032663U1989-02-15
US20090103999A12009-04-23
JP2011133077A2011-07-07
Attorney, Agent or Firm:
GUANGZHOU SHENGLIHUA-IP AGENT LTD. (Floor 46, Building A Victory Plaza, No.103, Tiyu West Road, Tianhe Distric, Guangzhou Guangdong 0, 510620, CN)
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