WO2023029084A1 - 防松紧固件、螺纹紧固套件以及螺纹紧固组件 - Google Patents

防松紧固件、螺纹紧固套件以及螺纹紧固组件 Download PDF

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WO2023029084A1
WO2023029084A1 PCT/CN2021/118163 CN2021118163W WO2023029084A1 WO 2023029084 A1 WO2023029084 A1 WO 2023029084A1 CN 2021118163 W CN2021118163 W CN 2021118163W WO 2023029084 A1 WO2023029084 A1 WO 2023029084A1
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Prior art keywords
threaded
loosening
thread
segments
fastener
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PCT/CN2021/118163
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English (en)
French (fr)
Inventor
钟定中
夏瑞普
钟云山
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佛山市定中机械有限公司
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Publication of WO2023029084A1 publication Critical patent/WO2023029084A1/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
    • 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
    • F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
    • 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
    • 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

Definitions

  • the invention relates to the field of anti-loosening fastening technology, in particular to anti-loosening fasteners, threaded fastening kits and threaded fastening components.
  • FIG. 1 is a schematic diagram of ordinary screw 1 and ordinary nut 2 when they are threaded. Since there is a gap between the pitch diameter of the inner thread of the nut and the pitch diameter of the outer thread of the screw, when the two are threaded, The thread upper side 21 of the internal thread of the nut is in contact with the thread surface 11 of the screw, and the lower surface 22 of the thread of the nut internal thread is separated from the thread surface of the screw. In this case, the internal thread surface of the nut presents a unidirectional stress state.
  • the purpose of the invention is to provide an anti-loosening fastener to solve one or more technical problems in the prior art, and at least provide a beneficial option or create conditions.
  • the anti-loosening fastener of the first embodiment of the present invention it is provided with a threaded portion, and the threaded portion is provided with at least two threaded segments, all of which have the same geometric parameters, and the corresponding
  • the distance between the centerlines of two adjacent tooth bottoms is the pitch, and the distance between the centerlines of the tooth bottoms of any thread segment and the centerlines of the tooth bottoms of adjacent thread segments is equal to a non-integer multiple of the pitch.
  • the anti-loosening fastener has at least the following beneficial effects:
  • the anti-loosening fastener can be an anti-loosening screw or a anti-loosening nut.
  • the distance between the center lines is equal to a non-integer multiple of the pitch, that is, there is a misalignment in the axial direction between two adjacent threaded segments, so when the anti-loosening fastener is threaded with an ordinary fastener, one of the threaded segments
  • the upper side of the tooth profile and the thread surface of ordinary fasteners are in a state of contact and stress, while the lower side of the tooth profile of the thread section is in a state of separation from the thread surface of ordinary fasteners.
  • the thread section mainly bears the stress caused by fastening.
  • the thread surface of the ordinary fastener is in a state of separation.
  • the main function of the thread section is to eliminate the axial clearance when the previous thread section cooperates with the ordinary fastener, and to produce a certain amount of interference to prevent the nut from loosening. .
  • the use of the anti-loosening fastener can effectively eliminate the fit gap between the screw and the nut in both axial and radial directions when they are in a locked state, preventing the screw from being locked in both the radial and axial directions. Movement in one direction and provide the axial preload required for locking to achieve a good anti-loosening effect.
  • the thread portion in order to facilitate processing of different thread segments, is provided with an undercut between every two adjacent thread segments.
  • the shortest straight line between the threading point of any thread segment and the central axis of the thread part is the threading floss
  • the flosses of each adjacent two thread segments are not parallel to each other, so that the projections of the flosses of each adjacent two thread segments on the radial plane form an angle of ⁇ , and the value of ⁇ is the same as
  • the axial preload required for locking is positively correlated.
  • the threaded part is an internal thread
  • the anti-loosening fastener is a anti-loosening nut
  • the threaded part is an external thread
  • the anti-loosening fastener is an anti-loosening screw, an anti-loosening bolt or an anti-loosening stud.
  • the threaded part is a one-time forming component, which can be processed and formed by one clamping, so as to save the production time and production cost of the anti-loosening fastener.
  • the number of the thread segments is two.
  • the number of the threaded segments is three or more, and all the threaded segments are arranged in the form of plum-blossom bamboos.
  • the threaded fastening kit according to the second embodiment of the present invention includes a common fastener and the above-mentioned anti-loosening fastener, and the anti-loosening fastener is threadedly connected with the common fastener.
  • the thread fastening kit according to the inventive embodiment of the present invention has at least the following beneficial effects: if the anti-loosening fastener is a locknut, then the ordinary fastener is an ordinary screw; if the anti-loosening fastener is an anti-loosening In the case of screws, the common fasteners are common nuts, and the anti-loosening fasteners can be threaded with common common fasteners on the market, effectively reducing the cost of use.
  • the threaded fastening assembly of the third embodiment of the present invention includes at least two workpieces and the above-mentioned threaded fastening kit, at least one of the workpieces is provided with a mounting hole for screws to pass through, and all the workpieces are located at between the anti-loosening fasteners and the common fasteners.
  • the threaded fastening assembly according to the inventive embodiment of the present invention has at least the following beneficial effects: since the threaded fastening set has good anti-loosening performance, the threaded fastening set can ensure a locked connection between workpieces , in order to reduce the probability of safety accidents.
  • Fig. 1 is the structural representation of prior art screw and nut when threaded
  • Fig. 2 is a partial sectional view of a locknut according to an embodiment of the invention.
  • Fig. 3 is a schematic diagram of threading of two adjacent thread segments in an embodiment of the invention.
  • Fig. 4 is the comparison diagram of the anti-loosening nut of the inventive embodiment of the present invention and common nut;
  • Fig. 5 is a structural schematic diagram of a lock nut in an inventive embodiment of the invention when it is threaded;
  • Fig. 6 is a structural schematic diagram of the anti-loosening screw of the inventive embodiment of the present invention.
  • orientation descriptions such as up, down, front, back, left, right, etc. indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, only It is for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the invention.
  • the anti-loosening fastener 10 is provided with a threaded part 100, and the threaded part 100 can be an internal thread or an external thread, when the threaded part 100 is an internal thread At this time, the anti-loosening fastener 10 is a locknut.
  • the anti-loosening fastener 10 is an anti-loosening screw, an anti-loosening bolt or an anti-loosening stud.
  • the structure of the anti-loosening fastener 10 will be described in detail by taking the anti-loosening nut as an example.
  • the threaded part 100 is provided with two threaded segments 110, and the two threaded segments 110 are spaced apart from each other.
  • Groove 120, the length of the undercut groove 120 is suitable for thread processing, it can be long or short, and the two thread segments 110 all have the same geometric parameters, such as geometric parameters such as pitch, profile, pitch diameter and direction of rotation,
  • the distance between two adjacent root centerlines 111 of any thread segment 110 is the thread pitch.
  • the starting points of the two threaded sections 110 can be set in different orientations, and the starting point of any one threaded section 110
  • the shortest straight line between the point and the central axis of the threaded part 100 is the floss 112, and the flosses 112 of two adjacent thread segments 110 are not parallel to each other, so that the flosses 112 of the adjacent two thread segments 110
  • the projection of 112 on the radial plane forms an angle ⁇ .
  • undercut groove 120 may not be provided between two adjacent thread segments 110, as long as the two thread segments 110 are not continuous with each other, it is also possible to separate the two thread segments 110.
  • the teething points are set in different orientations for the purpose.
  • the root centerline 111 of any one threaded segment 110 is different from the tooth root center of the adjacent threaded segment 110
  • the distance between the lines 111 is equal to a non-integer multiple of the pitch, that is, there is a dislocation in the axial direction between two adjacent thread segments 110, the height of the dislocation between the two thread segments 110 is k, and the absolute value of k is related to the value of ⁇ Values (in the range of 0° to 180°) are positively correlated.
  • the centerline 111 of the tooth bottom of the rear thread section 110 is relatively offset from the centerline 111 of the tooth bottom of the front thread section 110.
  • other processing means can also be used to generate a misalignment height between the two thread segments 110, which is not limited to the above-mentioned embodiment.
  • the number of the threaded segments 110 may be three or more, and all the threaded segments 110 are made of plum-blossom bamboo The form is arranged, that is, the geometric parameters and position parameters of the two thread segments 110 adjacent to any one thread segment 110 are the same.
  • the threaded part 100 is a one-time forming component, which can be processed and formed by one clamping to realize mass production.
  • the anti-loosening fastener 10 can also be an anti-loosening screw, anti-loosening bolt or anti-loosening stud, and what is threaded with it is an ordinary nut.
  • the internal thread and the internal thread are mutually matched structures, and the mechanical principles of the two are the same, so the present invention will not describe the anti-loosening fastener 10 with external thread in detail here.
  • the threaded fastening kit according to the second embodiment of the present invention includes the anti-loosening fastener 10 of the above-mentioned embodiment of the first aspect according to the present invention, and also includes a common fastener 20, if the If the anti-loosening fastener 10 is an anti-loosening nut, then the ordinary fastener 20 is an ordinary screw, and if the anti-loosening fastener 10 is an anti-loosening screw, then the ordinary fastener 20 is an ordinary nut,
  • the loose fastener 10 can be threadedly connected with common fasteners 20 commonly used in the market, effectively reducing the use cost.
  • the threaded fastening kit only needs to be tightened once to complete the entire threaded connection, which is more convenient to use than the prior art, such as Japanese Hard-lock locknuts; and Under the cooperation of the front and rear threaded sections 110, the threaded part 100 of the anti-loosening fastener 10 is in a contact force state within 360° along the axis, compared with the common fastener 20 and the Hard-lock anti-loosening nut.
  • the unidirectional contact state improves the force condition of the fasteners in the threaded connection parts, so as to improve the anti-loosening performance of the threaded fastening kit.
  • the threaded fastening assembly according to the third embodiment of the present invention includes the threaded fastening kit according to the second embodiment of the present invention, and also includes at least two workpieces 30, if one workpiece If internal threads or external threads are preset on 30, then at least one of the workpieces 30 is provided with mounting holes 31 for screws to pass through; if all workpieces 30 are not preset with internal threads or external threads, then all The workpieces 30 are all provided with mounting holes 31 for screws to pass through. No matter how the workpieces 30 are arranged, all the workpieces 30 are located between the anti-loosening fasteners 10 and the common fasteners 20. Since the threaded fastening kit has good anti-loosening performance, the threaded fastening The kit can ensure the locking connection between the workpieces 30 to reduce the probability of safety accidents.

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  • General Engineering & Computer Science (AREA)
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Abstract

本发明创造公开了防松紧固件，其设有螺纹部，所述螺纹部设有至少两个螺纹段，所有的螺纹段均具有相同的几何参数，任意一个螺纹段的相邻两条牙底中心线之间的距离为螺距，任意一个螺纹段的牙底中心线与相邻螺纹段的牙底中心线之间的距离等于非整数倍的螺距。与现有技术相比，采用所述防松紧固件能够有效地消除螺钉和螺母在处于锁紧状态时其沿轴向和径向两个方向上的配合间隙，防止螺钉在径向和轴向两个方向上的窜动，并提供锁紧所需的轴向预紧力，以达到良好的防松效果。同时，本发明创造还提供了一种应用上述防松紧固件的螺纹紧固套件以及应用上述螺纹紧固套件的螺纹紧固组件。

Description

防松紧固件、螺纹紧固套件以及螺纹紧固组件 技术领域
本发明创造涉及防松紧固技术领域，特别涉及防松紧固件、螺纹紧固套件以及螺纹紧固组件。
背景技术
利用螺纹配合实现工件的联接或紧固，具有结构简单、便于安装拆卸等优点，已被广泛应用于机械行业。如图1所示，这是普通的螺钉1与普通的螺母2在螺纹连接时的示意图，由于螺母内螺纹中径与螺钉外螺纹中径之间普遍存在间隙，因此两者在螺纹连接时，螺母内螺纹牙的牙型上侧面21与螺钉的螺纹面11处于接触受力状态，而螺母内螺纹牙的牙型下侧面22与螺钉的螺纹面处于分离状态。在此种情况下，螺母内螺纹牙型面呈现出单向的受力状态，螺钉与螺母在螺纹连接一段时间后，容易因持久的振动或达到材料的疲劳极限而造成螺母的内螺纹牙与螺钉的螺纹面逐渐脱离接触，使得螺钉的预紧力逐渐消失，从而导致螺母返松。为了解决螺母返松的问题，有必要对现有紧固件的结构进行改进，使其具有良好的防松性能。
发明内容
本发明创造旨在提供一种防松紧固件，以解决现有技术中所存在的一个或多个技术问题，至少提供一种有益的选择或创造条件。
根据本发明创造的第一方面实施例的防松紧固件，其设有螺纹部，所述螺纹部设有至少两个螺纹段，所有的螺纹段均具有相同的几何参数，任意一个螺纹段的相邻两条牙底中心线之间的距离为螺距，任意一个螺纹段的牙底中心线与相邻螺纹段的牙底中心线之间的距离等于非整数倍的螺距。
根据本发明创造实施例的防松紧固件，至少具有如下有益效果：所述防松紧固件可以为防松螺钉或者防松螺母，由于任意一个螺纹段的牙底中心线与相邻螺纹段的牙底中心线之间的距离等于非整数倍的螺距，即相邻的两个螺纹段存在轴线方向上的位置错位，因此当所述防松紧固件与普通紧固件进行螺纹连接之后，其中一个螺纹段的牙型上侧面与普通紧固件的螺纹面处于接触受力状态，而该螺纹段的牙型下侧面与普通紧固件的螺纹面处于分离状态，此时该螺纹段主要承受紧固所需的轴向预紧力；随着螺母或者螺钉的逐渐锁紧，另外一个螺纹段的牙型下侧面与普通紧固件的螺纹面处于接触受力状态，而该螺纹段的牙型上侧面与普通紧固件的螺纹面处于分离状态，此时该螺纹段主要作用是消除前一螺纹段与普通紧固件配合时的轴向间隙，并产生一定的过盈量，以防止螺母返松。与现有技术相比，采用所述防松紧固件能够有效地消除螺钉和螺母在处于锁紧状态时其沿轴向和径向两个方向上的配合间隙，防止螺钉在径向和轴向两个方向上的窜动，并提供锁紧所需的轴向预紧力，以达到良好的防松效果。
根据本发明创造的一些实施例，为了便于对不同的螺纹段进行加工，所述螺纹部在每相邻的两个螺纹段之间均设有退刀槽。
根据本发明创造的一些实施例，为了实现相邻的两个螺纹段在轴线方向上的位置错位，任意一个螺纹段的起牙点到所述螺纹部中心轴线之间的最短直线为起牙线，每相邻的两个螺纹段的起牙线相互不平行，使得每相邻的两个螺纹段的起牙线在径向平面上的投影均形成角度为α的夹角，α的数值与锁紧所需的轴向预紧力呈正相关。
根据本发明创造的一些实施例，所述螺纹部为内螺纹，此时所述防松紧固件为防松螺母。
根据本发明创造的一些实施例，所述螺纹部为外螺纹，此时所述防松紧固件为防松螺钉、防松螺栓或者防松螺柱。
根据本发明创造的一些实施例，所述螺纹部为一次成型构件，其可通过一次装夹加工成型，以节省所述防松紧固件的生产时间和生产成本。
根据本发明创造的一些实施例，为了节省所述防松紧固件的生产时间和生产成本，所述螺纹段的数量为两个。
根据本发明创造的一些实施例，为了进一步提升所述防松紧固件的防松性能，所述螺纹段的数量为三个或者三个以上，所有的螺纹段均以梅花间竹的形式进行排列。
根据本发明创造的第二方面实施例的螺纹紧固套件，包括普通紧固件和上述的防松紧固件，所述防松紧固件与所述普通紧固件螺纹连接。
根据本发明创造实施例的螺纹紧固套件，至少具有如下有益效果：若所述防松紧固件为防松螺母的话，则所述普通紧固件为普通螺钉，若所述防松紧固件为防松螺钉的话，则所述普通紧固件为普通螺母，所述防松紧固件能够与市面上通用的普通紧固件进行螺纹连接，有效降低使用成本。
根据本发明创造的第三方面实施例的螺纹紧固组件，包括至少两个工件和上述的螺纹紧固套件，至少一个所述工件设有用于供螺钉进行穿行的安装孔，所有的工件均位于所述防松紧固件与所述普通紧固件之间。
根据本发明创造实施例的螺纹紧固组件，至少具有如下有益效果：由于所述螺纹紧固套件具有良好的防松性能，因此所述螺纹紧固套件能够确保工件与工件之间的锁紧连接，以降低发生安全事故的概率。
本发明创造的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本发明创造的实践了解到。
附图说明
本发明创造的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1是现有技术的螺钉和螺母在螺纹连接时的结构示意图；
图2是本发明创造实施例的防松螺母的局部剖视图；
图3是本发明创造实施例的相邻两个螺纹段的起牙示意图；
图4是本发明创造实施例的防松螺母与普通螺母的对比图；
图5是本发明创造实施例的防松螺母在螺纹连接时的结构示意图；
图6是本发明创造实施例的防松螺钉的结构示意图。
具体实施方式
下面详细描述本发明创造的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本发明创造，而不能理解为对本发明创造的限制。
在本发明创造的描述中，需要理解的是，涉及到方位描述，例如上、下、前、后、左、右等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明创造和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明创造的限制。
在本发明创造的描述中，若干的含义是一个或者多个，多个的含义是两个以上，大于、小于、超过等理解为不包括本数，以上、以下、以内等理解为包括本数。
本发明创造的描述中，除非另有明确的限定，设置、安装、连接等词语应做广义理解，所属技术领域技术人员可以结合技术方案的具体内容合理确定上述词语在本发明创造中的具体含义。
根据本发明创造的第一方面实施例的防松紧固件，所述防松紧固件10设有螺纹部100，所述螺纹部100可以为内螺纹或者外螺纹，当所述螺纹部100为内螺纹时，此时所述防松紧固件10为防松螺母，当所述螺纹部100为外螺纹时，此时所述防松紧固件10为防松螺钉、防松螺栓或者防松螺柱，本实施例以防松螺母为例来对所述防松紧固件10的结构进行详细描述。
如图2所示，所述螺纹部100设有两个螺纹段110，两个所述螺纹段110前后间隔设置，所述螺纹部100在相邻的两个螺纹段110之间设有退刀槽120，所述退刀槽120的长度以便于螺纹加工为宜，可长可短，两个螺纹段110均具有相同的几何参数，例如螺距、牙型、中径和旋向等几何参数，任意一个螺纹段110 的相邻两条牙底中心线111之间的距离为螺距。
如图3所示，由于两个所述螺纹段110之间设有退刀槽120，因此两个所述螺纹段110的起牙点可以设置在不同的方位，任意一个螺纹段110的起牙点到所述螺纹部100中心轴线之间的最短直线为起牙线112，相邻的两个螺纹段110的起牙线112相互不平行，使得相邻的两个螺纹段110的起牙线112在径向平面上的投影形成角度为α的夹角。
需要说明的是，相邻的两个螺纹段110之间还可以不设有所述退刀槽120，只要两个所述螺纹段110不相互连续，亦可实现将两个所述螺纹段110的起牙点设置在不同方位的目的。
如图4所示，虽然两个所述螺纹段110的几何参数相同，但两者的起牙点不同，所以任意一个螺纹段110的牙底中心线111与相邻螺纹段110的牙底中心线111之间的距离等于非整数倍的螺距，即相邻的两个螺纹段110存在轴线方向上的位置错位，两个螺纹段110之间的错位高度为k，k的绝对值与α的数值(0°至180°范围内)呈正相关。可以理解的是，除了可通过调整两个起牙线112之间的角度差，使得后螺纹段110的牙底中心线111相对与前螺纹段110的牙底中心线111产生一定的错位高度之外，还可通过其他的加工手段来使得两个螺纹段110之间产生错位高度，而不限于上述实施例。
如图5所示，当所述防松螺母与普通螺钉进行螺纹连接时，其中一个螺纹段110的牙型上侧面与普通螺钉的螺纹面处于接触受力状态，而该螺纹段110的牙型下侧面与普通螺钉的螺纹面处于分离状态，此时该螺纹段110主要承受紧固所需的轴向预紧力；随着防松螺母的逐渐锁紧，另外一个螺纹段110的牙型下侧面与普通螺钉的螺纹面处于接触受力状态，而该螺纹段110的牙型上侧面与普通螺钉的螺纹面处于分离状态，此时该螺纹段110主要作用是消除前一螺纹段110与普通螺钉配合时的轴向间隙，并产生一定的过盈量，以防止螺母返松。需要说明的是，图4中k的数值(即图3中α的数值)与锁紧所需的轴向预紧力呈正相关，根据k值的不同，可制造出与不同尺寸公差等级的螺钉进行配合的防松螺母， 若所述防松螺母用于复杂交变的应用场合或者大型设备的话，此时应选择k值较大的防松螺母。
在本发明创造的一些实施例中，为了进一步提升所述防松螺母的防松性能，所述螺纹段110的数量可以为三个或者三个以上，所有的螺纹段110均以梅花间竹的形式进行排列，即与任意一个螺纹段110相邻的两个螺纹段110其几何参数以及位置参数均相同。
在本发明创造的一些实施例中，为了节省所述防松螺母的生产时间和生产成本，所述螺纹部100为一次成型构件，其可通过一次装夹加工成型，以实现大批量生产。
如图6所示，在另一些实施例中，所述防松紧固件10还可以为防松螺钉、防松螺栓或者防松螺柱，而与之进行螺纹连接的则是普通螺母，由于外螺纹与内螺纹为相互匹配的结构，两者的机械原理相通，因此本发明创造在此不再对带有外螺纹的防松紧固件10进行详细描述。
如图5所示，根据本发明创造的第二方面实施例的螺纹紧固套件，包括根据本发明创造上述第一方面实施例的防松紧固件10，还包括普通紧固件20，若所述防松紧固件10为防松螺母的话，则所述普通紧固件20为普通螺钉，若所述防松紧固件10为防松螺钉的话，则所述普通紧固件20为普通螺母，所述防松紧固件10能够与市面上通用的普通紧固件20进行螺纹连接，有效降低使用成本。除此之外，所述螺纹紧固套件只需进行一次旋紧即可完成整个螺纹连接，相比于现有技术，例如日本的Hard-lock防松螺母，在使用上更加具有便利性；而且在前后螺纹段110的配合下，所述防松紧固件10的螺纹部100在沿轴心360°的范围内均处于接触受力状态，相对于普通紧固件20和Hard-lock防松螺母的单方向接触状态，改善了螺纹连接部位中紧固件的受力状况，以提升螺纹紧固套件的防松性能。
如图5所示，根据本发明创造的第三方面实施例的螺纹紧固组件，包括根据本发明创造上述第二方面实施例的螺纹紧固套件，还包括至少两个工件30，若 一个工件30上预设有内螺纹或者外螺纹的话，则至少一个所述工件30设有用于供螺钉进行穿行的安装孔31，若所有的工件30均不预设有内螺纹或者外螺纹的话，则所有的工件30均设有用于供螺钉进行穿行的安装孔31。无论工件30是如何设置，所有的工件30均位于所述防松紧固件10与所述普通紧固件20之间，由于所述螺纹紧固套件具有良好的防松性能，因此所述螺纹紧固套件能够确保工件30与工件30之间的锁紧连接，以降低发生安全事故的概率。
上面结合附图对本发明创造实施例作了详细说明，但是本发明创造不限于上述实施例，在所述技术领域普通技术人员所具备的知识范围内，还可以在不脱离本发明创造宗旨的前提下作出各种变化。

Claims (10)

  1. 防松紧固件，其设有螺纹部，其特征在于：所述螺纹部设有至少两个螺纹段，所有的螺纹段均具有相同的几何参数，任意一个螺纹段的相邻两条牙底中心线之间的距离为螺距，任意一个螺纹段的牙底中心线与相邻螺纹段的牙底中心线之间的距离等于非整数倍的螺距。
  2. 根据权利要求1任意一项所述的防松紧固件，其特征在于：所述螺纹部在每相邻的两个螺纹段之间均设有退刀槽。
  3. 根据权利要求1或2任意一项所述的防松紧固件，其特征在于：任意一个螺纹段的起牙点到所述螺纹部中心轴线之间的最短直线为起牙线，每相邻的两个螺纹段的起牙线相互不平行。
  4. 根据权利要求1所述的防松紧固件，其特征在于：所述螺纹部为内螺纹。
  5. 根据权利要求1所述的防松紧固件，其特征在于：所述螺纹部为外螺纹。
  6. 根据权利要求1所述的防松紧固件，其特征在于：所述螺纹部为一次成型构件。
  7. 根据权利要求1所述的防松紧固件，其特征在于：所述螺纹段的数量为两个。
  8. 根据权利要求1所述的防松紧固件，其特征在于：所述螺纹段的数量为三个或者三个以上，所有的螺纹段均以梅花间竹的形式进行排列。
  9. 螺纹紧固套件，其特征在于，包括权利要求1至8任意一项所述的防松紧固件，还包括：普通紧固件，所述防松紧固件与所述普通紧固件螺纹连接。
  10. 螺纹紧固组件，其特征在于，包括权利要求9所述的螺纹紧固套件，还包括：至少两个工件，至少一个所述工件设有用于供螺钉进行穿行的安装孔，所有的工件均位于所述防松紧固件与所述普通紧固件之间。
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