WO2022179467A1 - 防止做松动方向自动滚动运动的螺纹副 - Google Patents

防止做松动方向自动滚动运动的螺纹副 Download PDF

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WO2022179467A1
WO2022179467A1 PCT/CN2022/077031 CN2022077031W WO2022179467A1 WO 2022179467 A1 WO2022179467 A1 WO 2022179467A1 CN 2022077031 W CN2022077031 W CN 2022077031W WO 2022179467 A1 WO2022179467 A1 WO 2022179467A1
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nut
bolt
thread
contact
loosening direction
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PCT/CN2022/077031
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English (en)
French (fr)
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许松林
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许松林
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Priority claimed from CN202110204885.7A external-priority patent/CN112833081A/zh
Priority claimed from CN202120416455.7U external-priority patent/CN214945662U/zh
Application filed by 许松林 filed Critical 许松林
Publication of WO2022179467A1 publication Critical patent/WO2022179467A1/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
    • F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
    • F16B39/12—Locking of screws, bolts or nuts in which the locking takes place after screwing down by means of locknuts

Definitions

  • the invention relates to the field of fasteners, in particular to a thread pair for preventing automatic rolling motion in the loosening direction.
  • the technical solution designed by the inventor with the announcement number of CN208252561U for "preventing the automatic rolling motion of double nut thread connection in the loosening direction" has the following disadvantages: at the same time, the upper flank of the inner thread of the second nut and the lower flank of the outer thread of the bolt are realized.
  • the structure of mutual contact and the structure of mutual contact between the lower flank of the internal thread of the first nut and the upper flank of the external thread of the bolt can effectively prevent the first nut, the second nut and the bolt from contacting each other during lateral vibration or impact.
  • the purpose of the present invention is to provide a kind of thread pair that can effectively prevent the first nut, the second nut and the bolt from continuously rolling in the loosening direction during lateral vibration or impact.
  • the technical problem to be solved by the present invention is : 1. Realize “when there is lateral vibration or impact, it can effectively prevent the continuous rolling movement between the second nut and the bolt in the loosening direction, thereby effectively preventing the continuous rolling movement between the first nut and the bolt in the loosening direction" 2.
  • a double-nut threaded connection that prevents automatic rolling motion in the loosening direction.
  • the technical scheme adopted in the present invention is:
  • the thread pair that prevents automatic rolling motion in the loosening direction includes a bolt, a first nut and a second nut, the major diameter of the inner thread of the second nut is smaller than the major diameter of the outer thread of the bolt, and the bolt, After the first nut and the second nut are installed and tightened on the workpiece, the bottom of the first nut is in contact with the workpiece, the bottom of the second nut is in contact with the top of the first nut, and the bottom of the second nut is in contact with the workpiece. There is a mutually laterally locked contact structure between the bottom of the inner thread and the crest of the outer thread of the bolt. There is a longitudinal gap between the outer thread of the bolt and the inner thread of the first nut.
  • the major diameter of the internal thread is larger than the major diameter of the external thread of the bolt, the minor diameter of the internal thread of the first nut is greater than the minor diameter of the external thread of the bolt, and the part where the bottom of the internal thread and the crest of the external thread contact each other.
  • Materials are not nylon, rubber and synthetic resin.
  • the first nut and the second nut are installed and tightened on the workpiece (refer to Fig. 1 and Fig. 2 ), there is no first nut between the second nut and the first nut that can be continuously formed.
  • the inner thread bottom of the second nut and the outer thread crest of the bolt are mutually laterally locked contact structures.
  • an initial clamping force is generated.
  • the top of the first nut is subjected to an axial force exerted by the second nut while the bolt is stretched. proportional to the length.
  • the axial force applied by the external thread of the bolt to the internal thread of the first nut is correspondingly reduced by an amount that is also proportional to the length of the bolt being stretched proportional. Therefore, as long as the axial force on the top of the first nut is not greater than the initial clamping force, the clamping force on the workpiece will not change.
  • the first nut and the second nut are installed and tightened on the workpiece, generally the axial force on the inner thread of the first nut is smaller than the clamping force on the workpiece. Therefore, in order to reduce the weight and cost of the thread pair for preventing automatic rolling motion in the loosening direction, preferably, the first nut is a standard thin nut.
  • the material of the part where the bottom of the internal thread and the top of the external thread are in contact with each other is nylon, rubber or synthetic resin
  • the nylon material, rubber material or synthetic resin material will produce continuous elastic deformation, which will cause the second nut to be generated between the bottom of the internal thread and the top of the external thread.
  • the space for continuous rolling motion in the loosening direction with the bolt therefore, "the material of the part where the bottom of the internal thread and the top of the external thread contact each other is not nylon, rubber or synthetic resin" is the prevention of loosening. Necessary for threaded pair of directional automatic rolling motion.
  • the bolt and the second nut are metal fasteners.
  • the thread pair that prevents automatic rolling motion in the loosening direction includes a bolt, a first nut and a second nut, the inner thread diameter of the second nut is smaller than the outer thread diameter of the bolt, the bolt, the first nut and the second nut are After the nut and the second nut are installed and tightened on the workpiece, the bottom of the first nut is in contact with the workpiece, the bottom of the second nut is in contact with the top of the first nut, and the inner thread of the second nut is in contact with the workpiece.
  • the tooth crest and the external thread bottom of the bolt are mutually laterally locked contact structures, and there is a longitudinal gap between the external thread of the bolt and the internal thread of the first nut, and the internal thread of the first nut has a longitudinal gap.
  • the major diameter is greater than the major diameter of the external thread of the bolt
  • the minor diameter of the internal thread of the first nut is greater than the minor diameter of the external thread of the bolt
  • the material of the part where the internal thread crest and the external thread bottom are in contact with each other is not Nylon, rubber and synthetic resins.
  • the first nut and the second nut are installed and tightened on the workpiece (refer to FIG. 3 and FIG. 4 ), there is no first nut between the second nut and the first nut that can be continuously formed.
  • the internal thread crest of the second nut and the external thread bottom of the bolt are mutually laterally locked contact structures. Therefore, the second nut is subject to lateral vibration or impact.
  • There is no continuous rolling motion in the loosening direction with the bolt so that the first nut cannot carry the second nut on the bolt to continuously perform rolling motion in the loosening direction during lateral vibration or impact, That is, during lateral vibration or impact, the first nut and the bolt cannot continuously perform rolling motion in the loosening direction.
  • an initial clamping force is generated.
  • the top of the first nut is subjected to an axial force exerted by the second nut while the bolt is stretched. proportional to the length.
  • the axial force applied by the external thread of the bolt to the internal thread of the first nut is correspondingly reduced by an amount that is also proportional to the length of the bolt being stretched proportional. Therefore, as long as the axial force on the top of the first nut is not greater than the initial clamping force, the clamping force on the workpiece will not change.
  • the first nut and the second nut are installed and tightened on the workpiece, generally the axial force on the inner thread of the first nut is smaller than the clamping force on the workpiece. Therefore, in order to reduce the weight and cost of the thread pair for preventing automatic rolling motion in the loosening direction, preferably, the first nut is a standard thin nut.
  • the material of the part where the internal thread crest and the external thread bottom are in contact with each other is nylon, rubber or synthetic resin
  • the nylon material, rubber material or synthetic resin material will produce continuous elastic deformation, which will cause the second nut to be generated between the internal thread crest and the external thread bottom.
  • the space for continuous rolling motion in the loosening direction with the bolt therefore, "the material of the part where the internal thread crest and the external thread bottom are in contact with each other is not nylon, rubber or synthetic resin" is the prevention of loosening. Necessary for threaded pair of directional automatic rolling motion.
  • the bolt and the second nut are metal fasteners.
  • the so-called "transverse direction” is the same as the radial direction of the thread.
  • the so-called "longitudinal direction" is the same as the axial direction of the thread.
  • the so-called “there is a longitudinal gap between the external thread of the bolt and the internal thread of the first nut” means “there is a gap between the external thread of the bolt and the internal thread of the first nut” The space in which the bolt and the first nut can perform longitudinal linear movement”.
  • the beneficial effects of the present invention are: the above-mentioned thread pair for preventing automatic rolling movement in the loosening direction can effectively prevent the second nut and the bolt from continuously rolling in the loosening direction during lateral vibration or impact, thereby effectively preventing The first nut and the bolt continuously perform rolling motion in the loosening direction; the lower flank of the first nut and the upper flank of the outer thread of the bolt are not in contact with each other, and can also be effective in lateral vibration or impact. Prevent the first nut, the second nut and the bolt from rolling in the loosening direction continuously, that is, the axial force on the top of the first nut is not greater than the initial clamping force, and it can also be effective during lateral vibration or impact.
  • Fig. 1 is the central longitudinal section side view structural schematic diagram of the use state of the thread pair for preventing automatic rolling motion in the loosening direction according to the first embodiment of the present invention
  • FIG. 2 is a schematic view of the central longitudinal section side view of the use state of the thread pair for preventing automatic rolling motion in the loosening direction according to the second embodiment of the present invention.
  • Fig. 3 is the central longitudinal section side view structural schematic diagram of the use state of the thread pair for preventing the automatic rolling motion in the loosening direction according to the third embodiment of the present invention
  • FIG. 4 is a schematic diagram of a central longitudinal section side view of the use state of the thread pair for preventing automatic rolling motion in the loosening direction according to the fourth embodiment of the present invention.
  • the thread pair for preventing automatic rolling motion in the loosening direction includes a bolt 1, a first nut 2 and a second nut 3.
  • the inner thread of the second nut 3 has a larger diameter than the outer thread of the bolt 1.
  • Large diameter after the bolt 1, the first nut 2 and the second nut 3 are installed and tightened on the workpiece 4, the bottom of the first nut 2 is in contact with the workpiece 4, and the bottom of the second nut 3 is in contact with the workpiece 4.
  • the top of the first nut 2 is in contact, the bottom of the inner thread of the second nut 3 and the crest of the outer thread of the bolt 1 are mutually laterally locked contact structures, and the inner thread of the first nut 2 is in contact with each other.
  • the bolt 1 and the second nut 3 are metal fasteners.
  • the first nut 2 is a standard thin nut.
  • the thread pair for preventing automatic rolling motion in the loosening direction includes a bolt 1, a first nut 2 and a second nut 3.
  • the major diameter of the inner thread of the second nut 3 is smaller than the outer thread of the bolt 1 Large diameter, after the bolt 1, the first nut 2 and the second nut 3 are installed and tightened on the workpiece 4, the bottom of the first nut 2 is in contact with the workpiece 4, and the bottom of the second nut 3 is in contact with the workpiece 4.
  • the top of the first nut 2 is in contact, the bottom of the inner thread of the second nut 3 and the crest of the outer thread of the bolt 1 are mutually laterally locked contact structures, and the inner thread of the first nut 2 is under the contact structure.
  • the bolt 1 and the second nut 3 are metal fasteners.
  • the first nut 2 is a standard thin nut.
  • the thread pair for preventing automatic rolling motion in the loosening direction includes a bolt 1, a first nut 2 and a second nut 3.
  • the inner thread diameter of the second nut 3 is smaller than the outer thread diameter of the bolt 1.
  • the top of a nut 2 is in contact with each other, the internal thread crest of the second nut 3 and the external thread bottom of the bolt 1 are mutually laterally locked in contact structure, and the top flank of the internal thread of the first nut 2
  • the small diameter of the internal thread is larger than the small diameter of the external thread of the bolt 1, and the material of the part where the internal thread crest and the external thread bottom are in contact with each other is not nylon, rubber or synthetic resin.
  • the bolt 1 and the second nut 3 are metal fasteners.
  • the first nut 2 is a standard thin nut.
  • the thread pair for preventing automatic rolling motion in the loosening direction includes a bolt 1, a first nut 2 and a second nut 3.
  • the inner thread diameter of the second nut 3 is smaller than the outer thread diameter of the bolt 1.
  • the top of a nut 2 is in contact with each other, the internal thread crest of the second nut 3 and the external thread bottom of the bolt 1 are mutually laterally locked in contact structure, and the lower flank of the internal thread of the first nut 2
  • the small diameter of the internal thread is larger than the small diameter of the external thread of the bolt 1, and the material of the part where the internal thread crest and the external thread bottom are in contact with each other is not nylon, rubber or synthetic resin.
  • the bolt 1 and the second nut 3 are metal fasteners.
  • the first nut 2 is a standard thin nut.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Devices (AREA)

Abstract

一种防止做松动方向自动滚动运动的螺纹副，包括螺栓（1）、第一螺母（2）及第二螺母（3），第二螺母（3）的内螺纹大径小于螺栓（1）的外螺纹大径，或第二螺母（3）的内螺纹小径小于螺栓（1）的外螺纹小径，螺栓（1）、第一螺母（2）及第二螺母（3）在工件（4）上安装拧紧后，第一螺母（2）的底部与工件（4）接触，第二螺母（3）的底部与第一螺母（2）的顶部接触，第二螺母（3）的内螺纹牙底与螺栓（1）的外螺纹牙顶之间是相互横向锁定的接触结构，或第二螺母（3）的内螺纹牙顶与螺栓（1）的外螺纹牙底之间是相互横向锁定的接触结构，该装置在横向振动或冲击的时候能有效防止第一螺母（2）、第二螺母（3）与螺栓（1）之间连续地做松动方向滚动运动。

Description

防止做松动方向自动滚动运动的螺纹副 技术领域
本发明涉及紧固件领域，具体涉及一种防止做松动方向自动滚动运动的螺纹副。
背景技术
客观上，内螺纹件与外螺纹件之间向相对松动方向自动转动的方式有滑动运动(例如，在转动惯性的作用下内螺纹件会产生向相对松退方向的滑行转动)与滚动运动(无固定轴横向旋转运动)这两种方式。
发明人在已发表的文章《全新的圆柱螺纹联接防松原理及防松技术》[中国新技术新产品，2015.10(上)]中，用理论分析与实验结果证明了“圆柱螺纹联接在横向振动或冲击的环境里产生的松动是内、外螺纹件之间的无固定轴横向旋转运动(滚动运动)，因此，只要实现内、外螺纹件之间的横向锁止，就能够阻止内、外螺纹件之间的无固定轴横向旋转运动，也就是能够实现圆柱螺纹联接在横向振动或冲击的环境里的完全防松”。
内螺纹件与外螺纹件之间做松动方向滚动运动，就必须得有能做松动方向滚动运动的空间。
发明人设计的公告号为CN208252561U的“防止做松动方向自动滚动运动的双螺母螺纹联接”的技术方案存在如下缺点：同时实现第二螺母的内螺纹上牙侧与螺栓的外螺纹下牙侧之间相互接触的结构与第一螺母的内螺纹下牙侧与螺栓的外螺纹上牙侧之间相互接触的结构，才能在横向振动或冲击的时候有效防止第一螺母、第二螺母与螺栓之间连续地做松动方向滚动运动，也就是，第一螺母的顶部受到的轴向力大于初始夹紧力，才能在横向振动或冲击的时候有效防止第一螺母、第二螺母与螺栓之间连续地做松动方向滚动运动，因此，实施该技术方案时很难控制对工件的夹紧力。
发明内容
本发明的目的是提供一种在横向振动或冲击的时候能有效防止第一螺母、第二螺母与螺栓之间连续地做松动方向滚动运动的螺纹副，进一步，本发明所要解决的技术问题是：1、实现“在横向振动或冲击的时候，能有效防止第二螺母与螺栓之间连续地做松动方向滚动运动，从而能有效防止第一螺母与螺栓之间连续地做松动方向滚动运动”的技术效果；2、克服上述“防止做松动方向自动滚动运动的双螺母螺纹联接”的技术方案存在的缺点。
为解决上述技术问题，本发明采用的技术方案是：
技术方案1：防止做松动方向自动滚动运动的螺纹副，包括螺栓、第一螺母及第二螺母，所述第二螺母的内螺纹大径小于所述螺栓的外螺纹大径，所述螺栓、第一螺母及第二螺母在工件上安装拧紧后，所述第一螺母的底部与所述工件接触，所述第二螺母的底部与所述第一螺母的顶部接触，所述第二螺母的内 螺纹牙底与所述螺栓的外螺纹牙顶之间是相互横向锁定的接触结构，所述螺栓的外螺纹与所述第一螺母的内螺纹之间有纵向间隙，所述第一螺母的内螺纹大径大于所述螺栓的外螺纹大径，所述第一螺母的内螺纹小径大于所述螺栓的外螺纹小径，所述内螺纹牙底与所述外螺纹牙顶相互接触的部位的材料不是尼龙、橡胶和合成树脂。
所述螺栓、第一螺母第二螺母在所述工件上安装拧紧后(参考图1、图2)，所述第二螺母与所述第一螺母之间没有所述第一螺母能连续地做松动方向滚动运动的空间，所述第二螺母的内螺纹牙底与所述螺栓的外螺纹牙顶之间是相互横向锁定的接触结构，因此，在横向振动或冲击的时候所述第二螺母与所述螺栓之间不能连续地做松动方向滚动运动，从而，在横向振动或冲击的时候所述第一螺母不能带着所述第二螺母在所述螺栓上连续地做松动方向滚动运动，也就是，在横向振动或冲击的时候所述第一螺母与所述螺栓之间不能连续地做松动方向滚动运动。
所述螺栓与第一螺母在所述工件上安装拧紧后，产生初始夹紧力。拧紧所述第二螺母时，所述螺栓被拉伸的同时所述第一螺母的顶部受到由所述第二螺母施加的轴向力，该轴向力的大小与所述螺栓被拉伸的长度成正比。由于所述螺栓被拉伸，由所述螺栓的外螺纹施加给所述第一螺母的内螺纹的轴向力也会相应地减小，该减小的量也与所述螺栓被拉伸的长度成正比。因此，只要所述第一螺母的顶部受到的轴向力不大于所述初始夹紧力，所述工件受到的夹紧力就不会发生变化。
所述螺栓、第一螺母及第二螺母在所述工件上安装拧紧后，通常所述第一螺母的内螺纹受到的轴向力小于所述工件受到的夹紧力。因此，为了减少所述防止做松动方向自动滚动运动的螺纹副的重量与成本，优选地，所述第一螺母是标准薄螺母。
在横向振动或冲击的时候，如果，外螺纹与内螺纹之间没有纵向间隙，或内螺纹大径不大于外螺纹大径，或内螺纹小径不大于外螺纹小径，那么会出现由于外螺纹与内螺纹之间没有内螺纹件与外螺纹件能做松动方向滚动运动的空间而导致内螺纹件与外螺纹件之间做不了松动方向滚动运动的状况，因此，“所述螺栓的外螺纹与所述第一螺母的内螺纹之间有纵向间隙，所述第一螺母的内螺纹大径大于所述螺栓的外螺纹大径，所述第一螺母的内螺纹小径大于所述螺栓的外螺纹小径”是所述防止做松动方向自动滚动运动的螺纹副的必要条件。
如果所述内螺纹牙底与所述外螺纹牙顶相互接触的部位的材料是尼龙或橡胶或合成树脂，在横向振动或冲击的时候，当所述第二螺母相对于所述螺栓的横向惯性力大于一定值时，尼龙材料或橡胶材料或合成树脂材料就会产生连续的弹性变形，从而会导致在所述内螺纹牙底与所述外螺纹牙顶之间产生能使所述第二螺母与所述螺栓连续地做松动方向滚动运动的空间，因此，“所述内螺纹牙底与所述外螺纹牙顶相互接触的部位的材料不是尼龙、橡胶和合成树脂”是所述防止做松动方向自动滚动运动的螺纹副的必要条件。
为了增强防止做松动方向自动滚动运动的效果，优选地，所述螺栓及第二 螺母是金属材料紧固件。
技术方案2：防止做松动方向自动滚动运动的螺纹副，包括螺栓、第一螺母及第二螺母，所述第二螺母的内螺纹小径小于所述螺栓的外螺纹小径，所述螺栓、第一螺母及第二螺母在工件上安装拧紧后，所述第一螺母的底部与所述工件接触，所述第二螺母的底部与所述第一螺母的顶部接触，所述第二螺母的内螺纹牙顶与所述螺栓的外螺纹牙底之间是相互横向锁定的接触结构，所述螺栓的外螺纹与所述第一螺母的内螺纹之间有纵向间隙，所述第一螺母的内螺纹大径大于所述螺栓的外螺纹大径，所述第一螺母的内螺纹小径大于所述螺栓的外螺纹小径，所述内螺纹牙顶与所述外螺纹牙底相互接触的部位的材料不是尼龙、橡胶和合成树脂。
所述螺栓、第一螺母第二螺母在所述工件上安装拧紧后(参考图3、图4)，所述第二螺母与所述第一螺母之间没有所述第一螺母能连续地做松动方向滚动运动的空间，所述第二螺母的内螺纹牙顶与所述螺栓的外螺纹牙底之间是相互横向锁定的接触结构，因此，在横向振动或冲击的时候所述第二螺母与所述螺栓之间不能连续地做松动方向滚动运动，从而，在横向振动或冲击的时候所述第一螺母不能带着所述第二螺母在所述螺栓上连续地做松动方向滚动运动，也就是，在横向振动或冲击的时候所述第一螺母与所述螺栓之间不能连续地做松动方向滚动运动。
所述螺栓与第一螺母在所述工件上安装拧紧后，产生初始夹紧力。拧紧所述第二螺母时，所述螺栓被拉伸的同时所述第一螺母的顶部受到由所述第二螺母施加的轴向力，该轴向力的大小与所述螺栓被拉伸的长度成正比。由于所述螺栓被拉伸，由所述螺栓的外螺纹施加给所述第一螺母的内螺纹的轴向力也会相应地减小，该减小的量也与所述螺栓被拉伸的长度成正比。因此，只要所述第一螺母的顶部受到的轴向力不大于所述初始夹紧力，所述工件受到的夹紧力就不会发生变化。
所述螺栓、第一螺母及第二螺母在所述工件上安装拧紧后，通常所述第一螺母的内螺纹受到的轴向力小于所述工件受到的夹紧力。因此，为了减少所述防止做松动方向自动滚动运动的螺纹副的重量与成本，优选地，所述第一螺母是标准薄螺母。
在横向振动或冲击的时候，如果，外螺纹与内螺纹之间没有纵向间隙，或内螺纹大径不大于外螺纹大径，或内螺纹小径不大于外螺纹小径，那么会出现由于外螺纹与内螺纹之间没有内螺纹件与外螺纹件能做松动方向滚动运动的空间而导致内螺纹件与外螺纹件之间做不了松动方向滚动运动的状况，因此，“所述螺栓的外螺纹与所述第一螺母的内螺纹之间有纵向间隙，所述第一螺母的内螺纹大径大于所述螺栓的外螺纹大径，所述第一螺母的内螺纹小径大于所述螺栓的外螺纹小径”是所述防止做松动方向自动滚动运动的螺纹副的必要条件。
如果所述内螺纹牙顶与所述外螺纹牙底相互接触的部位的材料是尼龙或橡胶或合成树脂，在横向振动或冲击的时候，当所述第二螺母相对于所述螺栓的横向惯性力大于一定值时，尼龙材料或橡胶材料或合成树脂材料就会产生连续 的弹性变形，从而会导致在所述内螺纹牙顶与所述外螺纹牙底之间产生能使所述第二螺母与所述螺栓连续地做松动方向滚动运动的空间，因此，“所述内螺纹牙顶与所述外螺纹牙底相互接触的部位的材料不是尼龙、橡胶和合成树脂”是所述防止做松动方向自动滚动运动的螺纹副的必要条件。
为了增强防止做松动方向自动滚动运动的效果，优选地，所述螺栓及第二螺母是金属材料紧固件。
本发明中，所谓的“横向”，与螺纹的径向相同。
本发明中，所谓的“纵向”，与螺纹的轴向相同。
本发明中，所谓的“所述螺栓的外螺纹与所述第一螺母的内螺纹之间有纵向间隙”，是指“所述螺栓的外螺纹与所述第一螺母的内螺纹之间有所述螺栓与所述第一螺母能做纵向直线运动的空间”。
本发明的有益效果是：上述的防止做松动方向自动滚动运动的螺纹副，在横向振动或冲击的时候，能有效防止第二螺母与螺栓之间连续地做松动方向滚动运动，从而能有效防止第一螺母与螺栓之间连续地做松动方向滚动运动；第一螺母的内螺纹下牙侧与螺栓的外螺纹上牙侧之间不是相互接触的结构，也能在横向振动或冲击的时候有效防止第一螺母、第二螺母与螺栓之间连续地做松动方向滚动运动，也就是，第一螺母的顶部受到的轴向力不大于初始夹紧力，也能在横向振动或冲击的时候有效防止第一螺母、第二螺母与螺栓之间连续地做松动方向滚动运动；只要第一螺母的顶部受到的轴向力不大于初始夹紧力，工件受到的夹紧力就不会发生变化，因此，实施该技术方案时容易控制对工件的夹紧力。
附图说明
图1为本发明第一实施例的防止做松动方向自动滚动运动的螺纹副的使用状态的中心纵剖侧视结构示意图；
图2为本发明第二实施例的防止做松动方向自动滚动运动的螺纹副的使用状态的中心纵剖侧视结构示意图。
图3为本发明第三实施例的防止做松动方向自动滚动运动的螺纹副的使用状态的中心纵剖侧视结构示意图；
图4为本发明第四实施例的防止做松动方向自动滚动运动的螺纹副的使用状态的中心纵剖侧视结构示意图。
图中：1、螺栓，2、第一螺母，3、第二螺母,4、工件。
具体实施方式
下面通过具体实施例对本发明的防止做松动方向自动滚动运动的螺纹副作进一步的详细描述。
实施例1
如图1所示，防止做松动方向自动滚动运动的螺纹副，包括螺栓1、第一螺母2及第二螺母3，所述第二螺母3的内螺纹大径小于所述螺栓1的外螺纹大径， 所述螺栓1、第一螺母2及第二螺母3在工件4上安装拧紧后，所述第一螺母2的底部与所述工件4接触，所述第二螺母3的底部与所述第一螺母2的顶部接触，所述第二螺母3的内螺纹牙底与所述螺栓1的外螺纹牙顶之间是相互横向锁定的接触结构，所述第一螺母2的内螺纹上牙侧与所述螺栓1的外螺纹下牙侧之间相互接触的结构，所述第二螺母3的内螺纹上牙侧与所述螺栓1的外螺纹下牙侧之间相互接触的结构，所述螺栓1的外螺纹与所述第一螺母2的内螺纹之间有纵向间隙，所述第一螺母2的内螺纹大径大于所述螺栓1的外螺纹大径，所述第一螺母2的内螺纹小径大于所述螺栓1的外螺纹小径，所述内螺纹牙底与所述外螺纹牙顶相互接触的部位的材料不是尼龙、橡胶和合成树脂。
优选地，所述螺栓1及第二螺母3是金属材料紧固件。
优选地，所述第一螺母2是标准薄螺母。
实施例2
如图2所示，防止做松动方向自动滚动运动的螺纹副，包括螺栓1、第一螺母2及第二螺母3，所述第二螺母3的内螺纹大径小于所述螺栓1的外螺纹大径，所述螺栓1、第一螺母2及第二螺母3在工件4上安装拧紧后，所述第一螺母2的底部与所述工件4接触，所述第二螺母3的底部与所述第一螺母2的顶部接触，所述第二螺母3的内螺纹牙底与所述螺栓1的外螺纹牙顶之间是相互横向锁定的接触结构，所述第一螺母2的内螺纹下牙侧与所述螺栓1的外螺纹上牙侧之间相互接触的结构，所述第二螺母3的内螺纹上牙侧与所述螺栓1的外螺纹下牙侧之间相互接触的结构，所述螺栓1的外螺纹与所述第一螺母2的内螺纹之间有纵向间隙，所述第一螺母2的内螺纹大径大于所述螺栓1的外螺纹大径，所述第一螺母2的内螺纹小径大于所述螺栓1的外螺纹小径，所述内螺纹牙底与所述外螺纹牙顶相互接触的部位的材料不是尼龙、橡胶和合成树脂。
优选地，所述螺栓1及第二螺母3是金属材料紧固件。
优选地，所述第一螺母2是标准薄螺母。
实施例3
如图3所示，防止做松动方向自动滚动运动的螺纹副，包括螺栓1、第一螺母2及第二螺母3，所述第二螺母3的内螺纹小径小于所述螺栓1的外螺纹小径，所述螺栓1、第一螺母2及第二螺母3在工件4上安装拧紧后，所述第一螺母2的底部与所述工件4接触，所述第二螺母3的底部与所述第一螺母2的顶部接触，所述第二螺母3的内螺纹牙顶与所述螺栓1的外螺纹牙底之间是相互横向锁定的接触结构，所述第一螺母2的内螺纹上牙侧与所述螺栓1的外螺纹下牙侧之间相互接触的结构，所述第二螺母3的内螺纹上牙侧与所述螺栓1的外螺纹下牙侧之间相互接触的结构，所述螺栓1的外螺纹与所述第一螺母2的内螺纹之间有纵向间隙，所述第一螺母2的内螺纹大径大于所述螺栓1的外螺纹大径，所述第一螺母2的内螺纹小径大于所述螺栓1的外螺纹小径，所述内螺纹牙顶与所述外螺纹牙底相互接触的部位的材料不是尼龙、橡胶和合成树脂。
优选地，所述螺栓1及第二螺母3是金属材料紧固件。
优选地，所述第一螺母2是标准薄螺母。
实施例4
如图4所示，防止做松动方向自动滚动运动的螺纹副，包括螺栓1、第一螺母2及第二螺母3，所述第二螺母3的内螺纹小径小于所述螺栓1的外螺纹小径，所述螺栓1、第一螺母2及第二螺母3在工件4上安装拧紧后，所述第一螺母2的底部与所述工件4接触，所述第二螺母3的底部与所述第一螺母2的顶部接触，所述第二螺母3的内螺纹牙顶与所述螺栓1的外螺纹牙底之间是相互横向锁定的接触结构，所述第一螺母2的内螺纹下牙侧与所述螺栓1的外螺纹上牙侧之间相互接触的结构，所述第二螺母3的内螺纹上牙侧与所述螺栓1的外螺纹下牙侧之间相互接触的结构，所述螺栓1的外螺纹与所述第一螺母2的内螺纹之间有纵向间隙，所述第一螺母2的内螺纹大径大于所述螺栓1的外螺纹大径，所述第一螺母2的内螺纹小径大于所述螺栓1的外螺纹小径，所述内螺纹牙顶与所述外螺纹牙底相互接触的部位的材料不是尼龙、橡胶和合成树脂。
优选地，所述螺栓1及第二螺母3是金属材料紧固件。
优选地，所述第一螺母2是标准薄螺母。
上述的实施例仅例示性说明本发明创造的原理及其功效，以及部分运用的实施例，而非用于限制本发明；应当指出，对于本领域的普通技术人员来说，在不脱离本发明创造构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。

Claims (6)

  1. 防止做松动方向自动滚动运动的螺纹副，包括螺栓、第一螺母及第二螺母，其特征在于：所述第二螺母的内螺纹大径小于所述螺栓的外螺纹大径，所述螺栓、第一螺母及第二螺母在工件上安装拧紧后，所述第一螺母的底部与所述工件接触，所述第二螺母的底部与所述第一螺母的顶部接触，所述第二螺母的内螺纹牙底与所述螺栓的外螺纹牙顶之间是相互横向锁定的接触结构，所述螺栓的外螺纹与所述第一螺母的内螺纹之间有纵向间隙，所述第一螺母的内螺纹大径大于所述螺栓的外螺纹大径，所述第一螺母的内螺纹小径大于所述螺栓的外螺纹小径，所述内螺纹牙底与所述外螺纹牙顶相互接触的部位的材料不是尼龙、橡胶和合成树脂。
  2. 根据权利要求1所述的防止做松动方向自动滚动运动的螺纹副，其特征在于：所述螺栓及第二螺母是金属材料紧固件。
  3. 根据权利要求1所述的防止做松动方向自动滚动运动的螺纹副，其特征在于：所述第一螺母是标准薄螺母。
  4. 防止做松动方向自动滚动运动的螺纹副，包括螺栓、第一螺母及第二螺母，其特征在于：所述第二螺母的内螺纹小径小于所述螺栓的外螺纹小径，所述螺栓、第一螺母及第二螺母在工件上安装拧紧后，所述第一螺母的底部与所述工件接触，所述第二螺母的底部与所述第一螺母的顶部接触，所述第二螺母的内螺纹牙顶与所述螺栓的外螺纹牙底之间是相互横向锁定的接触结构，所述螺栓的外螺纹与所述第一螺母的内螺纹之间有纵向间隙，所述第一螺母的内螺纹大径大于所述螺栓的外螺纹大径，所述第一螺母的内螺纹小径大于所述螺栓的外螺纹小径，所述内螺纹牙顶与所述外螺纹牙底相互接触的部位的材料不是尼龙、橡胶和合成树脂。
  5. 根据权利要求4所述的防止做松动方向自动滚动运动的螺纹副，其特征在于：所述螺栓及第二螺母是金属材料紧固件。
  6. 根据权利要求4所述的防止做松动方向自动滚动运动的螺纹副，其特征在于：所述第一螺母是标准薄螺母。
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CN103291729A (zh) * 2013-07-03 2013-09-11 许松林 防松动螺纹件
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CN108468704A (zh) * 2018-04-23 2018-08-31 许松林 防止做松动方向自动滚动运动的螺纹联接
CN108488200A (zh) * 2018-04-23 2018-09-04 许松林 防止做松动方向自动滚动运动的双螺母螺纹联接
CN208252561U (zh) * 2018-04-23 2018-12-18 许松林 防止做松动方向自动滚动运动的双螺母螺纹联接
CN112833081A (zh) * 2021-02-23 2021-05-25 许松林 防止做松动方向自动滚动运动的螺纹副
CN214945662U (zh) * 2021-02-23 2021-11-30 许松林 防止做松动方向自动滚动运动的螺纹副

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