WO2023039971A1 - 一种s型螺纹的锁紧螺母 - Google Patents

一种s型螺纹的锁紧螺母 Download PDF

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Publication number
WO2023039971A1
WO2023039971A1 PCT/CN2021/123974 CN2021123974W WO2023039971A1 WO 2023039971 A1 WO2023039971 A1 WO 2023039971A1 CN 2021123974 W CN2021123974 W CN 2021123974W WO 2023039971 A1 WO2023039971 A1 WO 2023039971A1
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Prior art keywords
nut
threads
thread
boss
locking
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PCT/CN2021/123974
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English (en)
French (fr)
Inventor
姜琼琼
李洋洋
孙小康
周昶霖
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日泰（上海）汽车标准件有限公司
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Publication of WO2023039971A1 publication Critical patent/WO2023039971A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
    • F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
    • F16B39/30—Locking exclusively by special shape of the screw-thread
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B33/00—Features common to bolt and nut
    • F16B33/02—Shape of thread; Special thread-forms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B37/00—Nuts or like thread-engaging members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B43/00—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts
    • F16B43/001—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts for sealing or insulation

Definitions

  • the invention relates to the technical field of lock nuts, in particular to a lock nut with S-shaped threads.
  • the common anti-loosening process of fastener structure is mainly in the aspects of structural anti-loosening and frictional anti-loosening.
  • the relatively common applications are: 1. Three-point lock nut or opposite side lock nut, that is, by changing the shape of the internal thread To achieve locking, easy to operate. Its disadvantages are: changing the size and matching shape by pressing three points or pressing the side, the size of the pressing points is uniform, and the locking torque often fails.
  • Nylon insert lock nut This insert is made of metal or nylon.
  • nylon material has the best toughness and wear resistance, and has good recovery and reusability, so Most of the lock nuts with nylon inserts are used in the industry and on the market, but the use temperature and surface treatment process (such as coating process) of this lock nut are limited by the use temperature of nylon materials, between -54°C and 100°C If the temperature is too high, the nylon material will soften and deform; if the temperature is too low, the nylon material will become brittle and hard and accelerate aging, thereby reducing the locking function.
  • the present invention provides a lock nut with S-shaped thread, which utilizes the structural interference of the meshing position to increase the friction and prevent the nut from loosening.
  • a triangular boss is designed on the tightening surface of the nut to allow The contact surface is more stable to ensure the effective sealing of the aluminum gasket.
  • a lock nut with S-shaped thread including a nut, which is characterized in that: an internal thread is axially provided on the inner side of the nut, and the internal thread includes a straight thread and an S thread, and the thread located above the center of the nut An S thread is provided on the inner side, and straight threads are provided above and below the S thread; a boss is connected to the bottom of the nut, and a through hole is provided in the center of the boss; an aluminum washer is provided below the nut.
  • the boss has a triangular panel structure, and the three sides of the outer edge of the boss are arc edges, and the thickness of the boss is 0.5mm.
  • the nut and the boss are integrally structured.
  • the diameter of the aluminum washer is larger than that of the nut, and the thickness of the aluminum washer is 1mm.
  • the present invention provides a lock nut with S-shaped thread.
  • the thread adopts the technology of changing the equivalent friction angle to realize the locking function, which can effectively avoid loosening.
  • the surface treatment method of the aluminum gasket is simple, only passivation treatment is required, it is not easy to rust, and the cost performance is high.
  • Fig. 1 is a cross-sectional view of the structure of the present invention.
  • Fig. 2 is a side view of the structure of the present invention.
  • Fig. 3 is a perspective view of the nut structure.
  • Figure 4 is a comparison chart of anti-loosening performance in lateral vibration experiments.
  • 1 is a nut
  • 2 is a boss
  • 3 is an aluminum washer
  • 4 is an internal thread
  • 4-1 is a straight thread
  • 4-2 is an S thread.
  • an internal thread 4 is axially provided on the inner side of the nut 1.
  • the internal thread 4 includes a straight thread 4-1 and an S thread 4-2, and an S thread is provided on the inner side above the center of the nut 1.
  • Straight thread 4-1 is provided above and below the thread 4-2 and S thread 4-2; it is located at the bottom of the nut 1 and connected to the boss 2, and the center of the boss 2 is provided with a through hole; located below the nut 1 is provided with an aluminum washer 3.
  • S-threads 4-2 There are at least two S-threads 4-2, and several S-threads 4-2 are arranged consecutively in sequence.
  • the boss 2 has a triangular panel structure, and the three sides of the outer edge of the boss 2 are arc edges, and the thickness of the boss 2 is 0.5 mm.
  • the nut 1 and the boss 2 are integrally structured.
  • the diameter of the aluminum washer 3 is greater than that of the nut 1, and the thickness of the aluminum washer 3 is 1 mm.
  • Three-point pressure/side-to-side lock nut cold heading-tapping-three-point pressure/side-to-side pressure-heat treatment-surface treatment.
  • stamping is carried out before heat treatment.
  • the high temperature of heat treatment will cause the deformation of stamping size and affect the subsequent locking performance. If stamping is performed after heat treatment, the hardness of the nut is higher, and the stamping size is not in place, which affects performance.
  • Nylon embedded lock nut cold heading - tapping - heat treatment - surface treatment - riveting lock piece - surface treatment.
  • the disadvantage of this process is that the coating needs to be damaged when riveting the locking piece, which affects the corrosion resistance of the nut. It is necessary to do a surface treatment before riveting, and then do surface treatment again after riveting, which is costly and the surface
  • the processing technology is limited to the temperature process that the locking plate can withstand, and the selection is limited.
  • the S-type thread lock nut of the present invention when sealing is not required, the process is cold heading-tapping-heat treatment-surface treatment.
  • the production process is simple and the production efficiency is improved.
  • the process is cold heading-tapping-heat treatment-surface treatment-press washer.
  • the gasket can be lightly pressed to lock the buckle, and the original surface treatment coating will not be damaged.
  • the anti-loosening effect is confirmed by the residual torque.
  • the following is the test result of the lock nut of M8*1.25 specification. It can be seen that the residual torque of the S-type locking thread has no attenuation, and it can achieve better locking function, and compared with other types The locking thread makes the torque more stable.
  • the anti-loosening performance was compared through the lateral vibration test. As shown in Figure 4, after the lateral vibration test of the S-shaped thread, the retention rate of the axial pretightening force was above 80%.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bolts, Nuts, And Washers (AREA)

Abstract

本发明涉及锁紧螺母技术领域，具体的说是一种S型螺纹的锁紧螺母。一种S型螺纹的锁紧螺母，包括螺母，其特征在于：在螺母内侧轴向设有内螺纹，所述的内螺纹包括直螺纹及S螺纹，位于螺母中央上方的内侧设有S螺纹，S螺纹的上方及下方设有直螺纹；位于螺母底部连接凸台，凸台的中央设有通孔；位于螺母的下方设有铝垫圈。与现有技术相比，提供了一种S型螺纹的锁紧螺母，该螺纹采用改变当量摩擦角的技术实现锁紧功能，有效避免松脱，同时有铝垫圈，也能实现密封效果。

Description

一种S型螺纹的锁紧螺母 技术领域
本发明涉及锁紧螺母技术领域，具体的说是一种S型螺纹的锁紧螺母。
背景技术
目前常见的紧固件结构防松工艺，主要是结构防松和摩擦防松方面，相对较普遍的应用是：1.三点锁紧螺母或对边锁紧螺母，即通过改变内螺纹的形状来实现锁紧，操作简单。其缺点是：通过压三点或压对边工艺改变尺寸配合形状，压点尺寸均匀，经常会有锁紧力矩不合格的情况发生。2.尼龙嵌件锁紧螺母：这个嵌件有金属材质也有尼龙材质，在各种嵌件材料中，尼龙材料的韧性和耐磨性最佳，并且具有良好的复原性和重复使用性，所以行业内以及市场上用尼龙嵌件的锁紧螺母居多，但此锁紧螺母的使用温度以及表面处理工艺(如涂覆工艺)受限于尼龙材料的使用温度，在-54℃～100℃之间使用，过高的温度会使尼龙材料软化变形，过低的温度会使尼龙材料变得脆硬并加速老化，从而降低锁紧功能。
另外，以上两种螺母，都不具备密封作用。在一些油管，水管联接点使用的零件，需要靠密封垫圈来进行密封，在装配时零件与垫片分开装配，操作麻烦，也存在漏装的风险。
发明内容
本发明为克服现有技术的不足，提供一种S型螺纹的锁紧螺母，利用啮合位置的结构干涉，增大摩擦提高防止螺母松退，在螺母的拧紧面设计三角凸台，作用是让接触面更稳固，保证铝垫圈有效密封。
为实现上述目的，设计一种S型螺纹的锁紧螺母，包括螺母，其特征在于：在螺母内侧轴向设有内螺纹，所述的内螺纹包括直螺纹及S螺纹，位于螺母中央上方的内侧设有S螺纹，S螺纹的上方及下方设有直螺纹；位于螺母底部连接凸台，凸台的中央设有通孔；位于螺母的下方设有铝垫圈。
所述的S螺纹至少设有2条，并且若干S螺纹为依次连续设置。
所述的凸台呈三角形面板结构，并且凸台外缘的三条边为圆弧边，所述的凸台的厚度为0.5mm。
所述的螺母与凸台为一体结构。
所述的铝垫圈的直径大于螺母的直径，铝垫圈的厚度为1mm。
本发明与现有技术相比，提供了一种S型螺纹的锁紧螺母，该螺纹采用改变当量摩擦角的技术实现锁紧功能，有效避免松脱，同时有铝垫圈，也能实现密封效果。
铝垫片表面处理方法简单，仅需钝化处理即可，不易生锈，性价比较高。
附图说明
图1为本发明结构剖视图。
图2为本发明结构侧视图。
图3为螺母结构立体图。
图4为横向震动实验进行防松性能对比图。
参见图1至图3，1为螺母，2为凸台，3为铝垫圈，4为内螺纹，4-1为直螺纹，4-2为S螺纹。
具体实施方式
下面根据附图对本发明做进一步的说明。
如图1至图3所示，在螺母1内侧轴向设有内螺纹4，所述的内螺纹4包括直螺纹4-1及S螺纹4-2，位于螺母1中央上方的内侧设有S螺纹4-2，S螺纹4-2的上方及下方设有直螺纹4-1；位于螺母1底部连接凸台2，凸台2的中央设有通孔；位于螺母1的下方设有铝垫圈3。
S螺纹4-2至少设有2条，并且若干S螺纹4-2为依次连续设置。
凸台2呈三角形面板结构，并且凸台2外缘的三条边为圆弧边，所述的凸台2的厚度为0.5mm。
螺母1与凸台2为一体结构。
铝垫圈3的直径大于螺母1的直径，铝垫圈3的厚度为1mm。
在加工工艺对比：
1.压三点/压对边式锁紧螺母：冷镦-攻丝-压三点/压对边-热处理-表面处理。
该工艺的缺点是在热处理前进行冲压，热处理高温会导致冲压尺寸变形，影响后续锁紧性能，如在热处理后进行冲压，螺母硬度较高，也会存在冲压尺寸不到位的情况，影响性能。
2.尼龙嵌入式锁紧螺母：冷镦-攻丝-热处理-表面处理-铆压锁片-表面处理。
该工艺的缺点是铆压锁片时需会对涂层有破坏，影响螺母的抗腐蚀能力，需要在铆压之前先做一道表面处理，铆压后再次做表面处理，成本较高，且表面处理工艺仅限于锁片能承受的温度的工艺，选择受限。
本发明S型螺纹锁紧螺母：当不需要密封时，工艺为冷镦-攻丝-热处理-表面处理。生产工序简单，提高生产效率。如需要密封锁片，则工艺为冷镦-攻丝-热处理-表面处理-压垫圈。垫圈轻压锁扣即可，不会破坏原表面处理涂层。
本发明S型螺纹锁紧螺母的防松实验数据如表1所示。
通过残余扭矩确认防松效果，以下为M8*1.25规格的锁紧螺母检测结果，可以看出，S型的锁紧螺纹残余扭矩无衰减，可达到较好的锁紧功能，且相对于其他类型的锁紧螺纹，扭矩更稳定。
表1
Figure PCTCN2021123974-appb-000001
通过横向震动实验进行防松性能对比，如图4所示，S型螺纹在横向震动实验后，轴向预紧力保持率在80％以上。

Claims (5)

  1. 一种S型螺纹的锁紧螺母，包括螺母，其特征在于：在螺母(1)内侧轴向设有内螺纹(4)，所述的内螺纹(4)包括直螺纹(4-1)及S螺纹(4-2)，位于螺母(1)中央上方的内侧设有S螺纹(4-2)，S螺纹(4-2)的上方及下方设有直螺纹(4-1)；位于螺母(1)底部连接凸台(2)，凸台(2)的中央设有通孔；位于螺母(1)的下方设有铝垫圈(3)。
  2. 根据权利要求1所述的一种S型螺纹的锁紧螺母，其特征在于：所述的S螺纹(4-2)至少设有2条，并且若干S螺纹(4-2)为依次连续设置。
  3. 根据权利要求1所述的一种S型螺纹的锁紧螺母，其特征在于：所述的凸台(2)呈三角形面板结构，并且凸台(2)外缘的三条边为圆弧边，所述的凸台(2)的厚度为0.5mm。
  4. 根据权利要求1所述的一种S型螺纹的锁紧螺母，其特征在于：所述的螺母(1)与凸台(2)为一体结构。
  5. 根据权利要求1所述的一种S型螺纹的锁紧螺母，其特征在于：所述的铝垫圈(3)的直径大于螺母(1)的直径，铝垫圈(3)的厚度为1mm。
PCT/CN2021/123974 2021-09-16 2021-10-15 一种s型螺纹的锁紧螺母 WO2023039971A1 (zh)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB140186A (en) * 1919-02-25 1920-03-25 Grip Nut Co Improvements in lock nuts and the method of constructing the same
CN1942678A (zh) * 2004-04-21 2007-04-04 伊利诺斯器械工程公司 螺纹紧固件
CN205446342U (zh) * 2015-12-29 2016-08-10 北京汽车研究总院有限公司 一种组合螺母
CN207814189U (zh) * 2017-12-27 2018-09-04 朗福紧固科技（西安）有限公司 一种双螺母锁紧结构
CN212272791U (zh) * 2020-04-10 2021-01-01 湖南申亿机械应用研究院有限公司 一种渐变式螺纹连接副
CN212657113U (zh) * 2020-06-27 2021-03-05 罗章平 自锁螺母组件
CN216199730U (zh) * 2021-09-16 2022-04-05 日泰（上海）汽车标准件有限公司 一种s型螺纹的锁紧螺母

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB140186A (en) * 1919-02-25 1920-03-25 Grip Nut Co Improvements in lock nuts and the method of constructing the same
CN1942678A (zh) * 2004-04-21 2007-04-04 伊利诺斯器械工程公司 螺纹紧固件
CN205446342U (zh) * 2015-12-29 2016-08-10 北京汽车研究总院有限公司 一种组合螺母
CN207814189U (zh) * 2017-12-27 2018-09-04 朗福紧固科技（西安）有限公司 一种双螺母锁紧结构
CN212272791U (zh) * 2020-04-10 2021-01-01 湖南申亿机械应用研究院有限公司 一种渐变式螺纹连接副
CN212657113U (zh) * 2020-06-27 2021-03-05 罗章平 自锁螺母组件
CN216199730U (zh) * 2021-09-16 2022-04-05 日泰（上海）汽车标准件有限公司 一种s型螺纹的锁紧螺母

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