CN102252019B - 膨胀螺丝 - Google Patents

膨胀螺丝 Download PDF

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CN102252019B
CN102252019B CN 201110193249 CN201110193249A CN102252019B CN 102252019 B CN102252019 B CN 102252019B CN 201110193249 CN201110193249 CN 201110193249 CN 201110193249 A CN201110193249 A CN 201110193249A CN 102252019 B CN102252019 B CN 102252019B
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expansion
screw mandrel
nut
drift
rod
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CN102252019A (zh
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翟潇
李蓬
董烁
孙德江
翟国防
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Di Guofang
Dong Shuo
Li peng
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Abstract

一种膨胀螺丝，它包括中杆、膨胀管及螺母，中杆一端为扩冲头，另一端与螺母螺纹连接，膨胀管套在中杆上并由扩冲头和螺母夹持限位，膨胀管一端延其长度方向被分割为多个膨胀爪，膨胀爪包裹在扩冲头上，中杆为分体结构：扩冲头、丝杆、连接丝杆，扩冲头与丝杆的相向端开有螺纹方向同向的螺纹孔，连接丝杆两端分另与螺纹孔连接；连接丝杆、丝杆、螺母的旋进方向相同。本方案中的膨胀螺丝，中杆旋出后只有扩冲头和膨胀管还留在墙体内，突出墙体的丝杆被卸下，可以简单修补就实现墙体的平整，且结构并不复杂，成本增加不大。

Description

膨胀螺丝
技术领域
本发明涉及一种五金连接工件，尤其涉及一种可方便拆解的膨胀螺丝。
背景技术
膨胀螺丝常见的建筑物墙体连接用工件，普通的膨胀螺丝，由中杆、膨胀管及螺母构成，中杆一端为扩冲头，扩冲头为一带有平滑锥度旋转体，直径由与中杆相同逐渐增加，其末端直径大于膨胀管，膨胀管为筒状套在中杆上，膨胀管一端延其长度方向被分割为多个膨胀爪，膨胀爪包裹在扩冲头上，中杆表面开有长螺纹，中杆上连接有螺母，膨胀管另一端由由螺母限位。使用时将膨胀螺丝置墙壁上的预留孔中，旋动螺母使扩冲头顶起膨胀爪从而将中杆固定于墙体，中杆带螺纹一端伸出墙体外作为安装使用。此结构的膨胀螺丝最大的问题在于膨胀螺丝一旦安装后，中杆陷于膨胀爪内卡于墙体中无法拆卸，只能将中杆露出墙体端切割掉，即是如此也无法完全清除痕迹。
发明内容
本发明的目的是提供一种安装后可方便将中杆进行拆卸清除的膨胀螺丝。
为实现上述目的，本发明采用的技术方案为：
一种膨胀螺丝，它包括中杆、膨胀管及螺母，中杆一端为扩冲头，另一端与螺母螺纹连接，膨胀管套在中杆上并由扩冲头和螺母夹持限位，膨胀管一端延其长度方向被分割为多个膨胀爪，膨胀爪包裹在扩冲头上，其特征在于：中杆为分体结构：扩冲头、丝杆、连接丝杆，扩冲头与丝杆的相向端开有螺纹方向同向的螺纹孔，连接丝杆两端分另与螺纹孔连接；连接丝杆、丝杆、螺母的旋进方向相同。
上述的一种膨胀螺丝，其特征在于：扩冲头尾部边缘形状为多边形，多边形边数多于膨胀爪数量；丝杆右侧的露出端被切削成方便拆卸的方头。
本发明中的膨胀螺丝，由于中杆为螺纹连接的三段式结构，当备紧螺母时扩冲头、连接丝杆、丝杆之间也用更加紧固，拆卸时，由于扩冲头尾部边楞会卡在膨胀爪之间的缝隙中，不会出现跟转的情况；拆下螺母时连接丝杆部位可能同时被旋出，如未被旋出，可用扳手或钳子套紧丝杆端的方头将丝杆反向旋出。旋出后只有扩冲头和膨胀管还留在墙体内，突出墙体的丝杆被卸下，可以简单修补就实现墙体的平整，且结构并不复杂，成本增加不大。
下面结合附图和实施例对本发明作进一步地说明。
附图说明
图1是本发明的结构示意图。
图2是图1中扩冲头的左视图。
图中1、扩冲头  2、连接丝杆  3、膨胀管  4、丝杠  5、垫圈  6、螺母
具体实施方式
实施例1
如图1、图2所示，一种膨胀螺丝，它包括中杆、膨胀管3及螺母6，中杆一端为扩冲头1，另一端与螺母6螺纹连接，膨胀管3套在中杆上并由扩冲头1和螺母6夹持限位，膨胀管3一端延其长度方向被分割为多个膨胀爪，膨胀爪包裹在扩冲头1上，中杆为分体结构：扩冲头1、丝杆4、连接丝杆2，扩冲头1与丝杆4的相向端开有螺纹方向同向的螺纹孔，连接丝杆2两端分另与螺纹孔连接；连接丝杆2、丝杆4、螺母6的旋进方向相同。扩冲头1尾部边缘形状为六边形，膨胀爪数量为四个；丝杆右侧的露出端被切削成方便拆卸的方头。

Claims (2)

1.一种膨胀螺丝，它包括中杆、膨胀管(3)及螺母(6)，中杆一端为扩冲头(1)，另一端与螺母(6)螺纹连接，膨胀管(3)套在中杆上并由扩冲头(1)和螺母(6)夹持限位，膨胀管(3)一端延其长度方向被分割为多个膨胀爪，膨胀爪包裹在扩冲头(1)上，其特征在于：中杆为分体结构，具体为三部分：扩冲头(1)、丝杆(4)、连接丝杆(2)，扩冲头(1)与丝杆(4)的相向端开有螺纹方向同向的螺纹孔，连接丝杆(2)两端分别与所述螺纹孔连接；连接丝杆(2)、丝杆(4)、螺母(6)的旋进方向相同。
2.根据权利要求1所述的一种膨胀螺丝，其特征在于：扩冲头(1)尾部边缘形状为多边形，多边形边数多于膨胀爪数量；丝杆右侧的露出端被切削成方便拆卸的方头。
CN 201110193249 2011-07-04 2011-07-04 膨胀螺丝 Expired - Fee Related CN102252019B (zh)

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CN105114422A (zh) * 2015-08-28 2015-12-02 腾志理 一种可拆卸式膨胀螺栓
TWI659682B (zh) 2018-03-13 2019-05-11 友達光電股份有限公司 顯示裝置
CN113137417B (zh) * 2021-04-29 2021-12-17 海宁天立金属制品有限公司 一种自适应伸缩膨胀螺钉及其加工装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1447021A (en) * 1974-01-11 1976-08-25 Fischer Artur Fastening device
CN2353956Y (zh) * 1998-06-12 1999-12-15 丁红娟 改良构造的膨胀螺丝
CN2409371Y (zh) * 2000-03-09 2000-12-06 孙宗仰 可拆并可再使用的膨胀螺丝
CN201286763Y (zh) * 2008-11-12 2009-08-12 程添栋 骨科交锁髓内钉拔出器
CN202132334U (zh) * 2011-07-04 2012-02-01 翟国防 膨胀螺丝

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2330446A1 (de) * 1973-06-15 1975-01-09 Maechtle Werkzeugfab Fritz Spreizduebel und verfahren zu seiner herstellung
DE10035580B4 (de) * 2000-07-21 2013-07-25 Simpson Strong-Tie Ireland Limited Formschlüssig setzbarer Hinterschneid-Anker

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1447021A (en) * 1974-01-11 1976-08-25 Fischer Artur Fastening device
CN2353956Y (zh) * 1998-06-12 1999-12-15 丁红娟 改良构造的膨胀螺丝
CN2409371Y (zh) * 2000-03-09 2000-12-06 孙宗仰 可拆并可再使用的膨胀螺丝
CN201286763Y (zh) * 2008-11-12 2009-08-12 程添栋 骨科交锁髓内钉拔出器
CN202132334U (zh) * 2011-07-04 2012-02-01 翟国防 膨胀螺丝

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