CN201062620Y - 凸肩锥凹面汽车牌照管状防盗螺母 - Google Patents

凸肩锥凹面汽车牌照管状防盗螺母 Download PDF

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CN201062620Y
CN201062620Y CNU2007200800322U CN200720080032U CN201062620Y CN 201062620 Y CN201062620 Y CN 201062620Y CN U2007200800322 U CNU2007200800322 U CN U2007200800322U CN 200720080032 U CN200720080032 U CN 200720080032U CN 201062620 Y CN201062620 Y CN 201062620Y
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张航
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Chengdu Wuhou Patent Consulting Research and Development Conversion Institute
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Chengdu Wuhou Patent Consulting Research and Development Conversion Institute
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Abstract

本实用新型涉及一种凸肩锥凹面汽车牌照管状防盗螺母,设置一起紧固作用的内螺母,外型像中空圆头螺栓,嵌入外螺母的圆形凹槽,内孔是与螺杆匹配的螺纹,外部是与外螺母匹配的细牙左旋浅螺纹。外螺母外型为厚壁管状,上管口边缘为弧状突起,中孔是与内螺母匹配的细牙左旋螺纹,其锁紧强度低于内螺母与螺杆的锁紧强度。该组合螺母装入螺杆后拧紧,达到额定扭矩时,外螺母螺纹破坏滑丝,只能在内螺母外围打滑,以达到防盗目的。另将内螺母的栓头帽盖,设置成锥凹面封头,可用不锈钢或彩色塑料,既美观光艳又无法用常规工具夹紧拆卸,起到一般防盗螺母无法起到的有光有色装饰作用。

Description

凸肩锥凹面汽车牌照管状防盗螺母
技术领域
本实用新型涉及一种紧固件的螺母部份,尤其是汽车牌照装饰防盗螺母。
背景技术
目前,公知的传统螺母,因其便于装卸,也便于犯罪份子盗窃破坏;一些有防盗功能的螺母,却又缺乏装饰艺术效果。
发明内容
为了克服上述的不足,本实用新型提供一种凸肩锥凹面汽车牌照管状防盗螺母,就能达到既防盗又美观的目的。
本实用新型解决其技术问题的技术方案是:由内螺母和外螺母组合而成的凸肩锥凹面汽车牌照管状防盗螺母,其特征是:设置一起紧固作用的内螺母,外型像中空圆头螺栓,其帽盖嵌入外螺母的圆形凹槽,内孔是与螺杆匹配的母螺纹,外部是与外螺母匹配的细牙左旋浅螺纹。外螺母是只起带动内螺母紧固作用的短命螺母,外型为厚壁管状,上管口边缘为弧状突起,中孔是与内螺母匹配的细牙左旋母螺纹,其锁紧强度低于内螺母与螺杆的锁紧强度。使用时先将内螺母,装入外螺母,旋紧成一套装组合螺母。该组合螺母装入螺杆后由管钳拧紧,达到额定扭矩时,短命螺母螺纹破坏滑丝,只能在内螺母外围打滑,用常规手段和工具就再也无法将内紧固螺母卸下,以达到防盗目的。另将内螺母的栓头帽盖,设置成锥凹面封头,可用不锈钢或彩色塑料,既美观光艳又无法用常规工具夹紧拆卸,起到一般防盗螺母无法起到的有光有色装饰作用。这里需注意的是螺杆长度,当锁紧目标物后不能超越球面封头内空。
本实用新型的有益效果是:结构简单、防拆盗性能良好、装饰性强、成本低。
附图说明
下面结合附图和实施例对本实用新型作进一步说明:
图1是内螺母全景示意图,图2是外螺母全景示意图,图3是内螺母解剖示意图,图4是外螺母解剖示意图,图5是装配成的组合螺母解剖示意图,图6是俯视示意图。
图中1.内螺母的锥凹面状封头圆柱形帽盖,2.与螺杆匹配的粗牙母螺纹,3.与外螺母匹配的细牙左旋浅螺纹,4.与内螺母圆头帽盖动配合的内圆槽,5.与内螺母匹配的细牙左旋母螺纹,6.弧状突起的上管口。
具体实施方式
在图中,设置一起紧固作用的内螺母(1),外型像中空圆头螺栓,其帽盖嵌入外螺母的圆形凹槽(4),内孔是与螺杆匹配的母螺纹(2),外部是与外螺母匹配的细牙左旋浅螺纹(3)。外螺母是只起带动内螺母紧固作用的短命螺母,外型为厚壁管状,上管口边缘为弧状突起(6),中孔是与内螺母匹配的细牙左旋母螺纹(5),其锁紧强度低于内螺母与螺杆的锁紧强度。该组合螺母装入螺杆后由管钳拧紧,当达到额定扭矩时,短命螺母螺纹破坏滑丝,只能在内螺母外围打滑,用常规手段和工具就再也无法将内紧固螺母卸下,以达到防盗目的。另将内螺母的栓头帽盖,设置成锥凹面封头,既美观光艳又无法用常规工具夹紧拆卸,起到一般防盗螺母无法起到的有光有色装饰作用。

Claims (3)

1.一种凸肩锥凹面汽车牌照管状防盗螺母,由内螺母和外螺母组合而成,其特征在于:设置一起紧固作用的内螺母(1),外型像中空圆头螺栓,内孔是与螺杆匹配的母螺纹(2),外部是与外螺母匹配的细牙左旋浅螺纹(3),外螺母外型为厚壁管状,上管口边缘为弧状突起(6),中孔是与内螺母匹配的细牙左旋母螺纹(5),其锁紧强度低于内螺母与螺杆的锁紧强度。
2.按权利要求1所述之凸肩锥凹面汽车牌照管状防盗螺母,其特征在于:内螺母的圆形帽盖,嵌入外螺母的圆形凹槽(4)。
3.按权利要求1所述之凸肩锥凹面汽车牌照管状防盗螺母,其特征在于:其内螺母的栓头帽盖,设置成锥凹面封头。
CNU2007200800322U 2007-06-22 2007-06-22 凸肩锥凹面汽车牌照管状防盗螺母 Expired - Fee Related CN201062620Y (zh)

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