CN2846858Y - 防盗螺母 - Google Patents

防盗螺母 Download PDF

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Publication number
CN2846858Y
CN2846858Y CN 200420060831 CN200420060831U CN2846858Y CN 2846858 Y CN2846858 Y CN 2846858Y CN 200420060831 CN200420060831 CN 200420060831 CN 200420060831 U CN200420060831 U CN 200420060831U CN 2846858 Y CN2846858 Y CN 2846858Y
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张航
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Abstract

本实用新型涉及一种紧固件的螺母部份,使其紧固后用常规手段无法进行拆卸,由内螺母和外螺母组合而成,内螺母起紧固作用,外型像中空圆头螺栓,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。外螺母是只起带动内螺母紧固作用的短命螺母,外型同六角螺母,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。实施时将该组合螺母(图5),装入螺杆后由扳手拧紧,当达到额定扭矩时,短命外螺母螺纹⑤破坏滑丝,只能在内螺母外围打滑,既不能进也不能退,再也无法将内紧固螺母卸下,这就有效地防止了犯罪份子的偷盗和破坏。

Description

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。
背景技术
传统的螺母,因其便于装卸,也便于犯罪份子盗窃破坏。
发明内容
本实用新型的目的,是在现有技术基础上付予新的技术方案:使其紧固后用常规手段无法进行拆卸,以达到防盗防破坏的目的。
本实用新型由内螺母和外螺母组合而成,内螺母起紧固作用,外型像中空圆头螺栓,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。外螺母是只起带动内螺母紧固作用的短命螺母,外型同六角螺母,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由搬手拧紧,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。
附图说明
图1是内螺母示意图,图2是外螺母示意图,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。
具体实施方式
图中1.内螺母的圆形帽盖,2.与螺杆匹配的粗牙螺纹,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。
实施前先将内螺母(图1),装入外螺母(图2),旋紧成一套装组合螺母(图5);实施时将该组合螺母(图5),装入螺杆后由搬手拧紧,当达到额定扭矩时,短命外螺母螺纹破坏滑丝,只能在内螺母外围打滑,既不能进也不能退,现在用常规手段和工具就再也无法将内紧固螺母卸下,这就有效地防止了犯罪份子的偷盗和破坏。

Claims (3)

1、一种防盗螺母,由内螺母及外螺母套装而成。其特征在于内螺母与外螺母通过左旋螺纹旋紧而成一组合套装螺母。
2、按权利要求1所述防盗螺母,其特征在于内螺母的圆形帽盖(1),嵌入外螺母的圆形凹槽(4),不露端盖。
3、如权利要求1、2所述的防盗螺母,其特征在于左旋螺纹为细牙浅螺纹,强度低于内螺母与螺杆粗牙匹配的螺纹(2)的强度。
CN 200420060831 2004-08-20 2004-08-20 防盗螺母 Expired - Fee Related CN2846858Y (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 200420060831 CN2846858Y (zh) 2004-08-20 2004-08-20 防盗螺母

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Application Number Priority Date Filing Date Title
CN 200420060831 CN2846858Y (zh) 2004-08-20 2004-08-20 防盗螺母

Publications (1)

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CN2846858Y true CN2846858Y (zh) 2006-12-13

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105156435A (zh) * 2015-09-12 2015-12-16 冯仓武 增压双旋锁芯螺母杆
CN110307240A (zh) * 2019-07-02 2019-10-08 海盐县华昇汽车配件有限公司 一种使用方便的防松防盗螺母

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105156435A (zh) * 2015-09-12 2015-12-16 冯仓武 增压双旋锁芯螺母杆
CN110307240A (zh) * 2019-07-02 2019-10-08 海盐县华昇汽车配件有限公司 一种使用方便的防松防盗螺母

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Granted publication date: 20061213

Termination date: 20090921