WO2017088788A1 - 锥形外螺纹与螺纹孔连接结构 - Google Patents

锥形外螺纹与螺纹孔连接结构 Download PDF

Info

Publication number
WO2017088788A1
WO2017088788A1 PCT/CN2016/107052 CN2016107052W WO2017088788A1 WO 2017088788 A1 WO2017088788 A1 WO 2017088788A1 CN 2016107052 W CN2016107052 W CN 2016107052W WO 2017088788 A1 WO2017088788 A1 WO 2017088788A1
Authority
WO
WIPO (PCT)
Prior art keywords
thread
connection structure
threaded hole
external thread
spiral
Prior art date
Application number
PCT/CN2016/107052
Other languages
English (en)
French (fr)
Inventor
游奕华
Original Assignee
游奕华
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 游奕华 filed Critical 游奕华
Publication of WO2017088788A1 publication Critical patent/WO2017088788A1/zh
Priority to US15/987,910 priority Critical patent/US10527082B2/en

Links

Images

Classifications

    • 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
    • F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
    • F16B35/041—Specially-shaped shafts
    • 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
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using 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
    • 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
    • F16B39/282—Locking by means of special shape of work-engaging surfaces, e.g. notched or toothed nuts

Definitions

  • the invention belongs to the technical field of threads, and in particular relates to a connection structure of a tapered external thread and a threaded hole.
  • a continuous protrusion having a predetermined cross-sectional shape formed along a spiral is called a thread.
  • the thread is the first mechanical structural element to achieve standardization, and is widely used in various industries.
  • the thread formed on the surface of the cylinder is called a cylindrical thread.
  • the thread formed on the surface of the cone is called a conical thread.
  • the thread formed on the surface of the end surface such as a cylinder or a truncated cone is called a plane thread.
  • the thread formed on the round surface is called the external thread.
  • the thread formed on the surface of the round hole in the mother body is called the internal thread.
  • the thread formed on the surface of the end surface of the mother body is called the end face thread.
  • the direction of the screw thread and the angle of the rising angle of the thread conform to the left-hand rule.
  • the thread that conforms to the right-hand rule in the direction of the upward direction of the thread is called a right-handed thread;
  • the thread with only one spiral in the same section of the parent is called a single-thread thread, and the thread with two spirals is called a double-line thread.
  • Threads threads with multiple spirals are called multi-thread threads; threads with triangular cross-section are called triangular threads, threads with trapezoidal cross-section are called trapezoidal threads, and threads with rectangular cross-section are called rectangular threads, cross-sectional shape
  • the zigzag thread is called a zigzag thread; the thread used for the structural fastening connection is called a fastening connection thread and is mainly used for the mechanism transmission. Threaded connections may also be referred to as drive for tightening a threaded connector, a threaded pipe connection is called the pipe thread.
  • the fastener thread is a fastening connection thread, generally a cylindrical thread, and the cross-sectional shape is triangular; usually a right-hand thread is used, and a left-hand thread is used when there is special requirement; a single-thread thread is generally used, and a double wire is used when there is a quick assembly and disassembly requirement. Thread or multi-threaded screw Pattern.
  • the fastener threads are composed of internal and external threaded fasteners, and the mating properties depend on the requirements of the connection system.
  • the basic requirements for fasteners for threads are load bearing and self-locking rather than transmission.
  • the basic condition of thread self-locking is that the equivalent friction angle must not be less than the helix angle.
  • the magnitude of the equivalent friction angle is related to the angle of the tooth.
  • the wedge thread which has appeared in recent years, also known as "Spirit Nut", is an improvement on the basic fastener thread types of the metric thread and the inch thread, in order to improve the self-locking performance of the fastener thread.
  • Metric threads include normal thread (M thread), metric aerospace thread (MJ thread), metric small thread (S thread) and Russian thread (MR thread); inch thread includes inch uniform thread (UN thread), imperial aerospace Threads (UNJ threads) and Imperial Wyeth threads, except for the British Wyeth thread with a 55° profile angle, the other threads use a 60° profile angle.
  • M thread normal thread
  • MJ thread metric aerospace thread
  • S thread metric small thread
  • MR thread Russian thread
  • inch thread includes inch uniform thread (UN thread), imperial aerospace Threads (UNJ threads) and Imperial Wyeth threads, except for the British Wyeth thread with a 55° profile angle, the other threads use a 60° profile angle.
  • This increase in the locking force is also due to the change in the angle of the profile, such that the normal force generated by the contact between the threads is at an angle of 60° to the bolt axis, rather than a 30° angle as with a normal thread.
  • the normal force of the thread must be much larger than the fastening pressure, so the resulting frictional friction is greatly increased. All along, people have studied and solved the looseness of threaded fasteners from the technical level of thread profile and such a technical direction.
  • the wedge thread technology is no exception, and the wedge thread is only a part of the triangular shape of the triangular thread.
  • Deformation can not be used to form a wedge thread thread pair, wedge thread can only be used for the thread thread of the nut thread and the triangular thread, and the locking force is also based on the thread profile
  • the size of the corner is the same as that of conventional thread technology and self-locking technology.
  • the bolts or nuts of the existing existing threaded fasteners have the defects of being easy to loose. As the gap of the connecting parts of the equipment is frequently increased, the bolts and the nuts are loosened or even fall off, which is easy to occur for some mechanical connections. The joints are separated from each other, and serious accidents are likely to occur.
  • the Chinese patent document discloses a self-locking spiral threaded fastener [Application No.: 200520045825.1] comprising a bolt and a nut threadedly connected to each other, the nut being provided with a female thread, characterized in that the female thread A wedge-shaped bevel is provided at the bottom of the tooth, and the cusp of the male thread of the bolt abuts against the wedge-shaped inclined surface.
  • the wedge bevel is at a 30 degree angle to the centerline of the nut.
  • the utility model adopts a wedge-shaped inclined surface provided at the bottom of the female thread.
  • the above solution improves the problem of easy looseness when the existing fasteners are connected to some extent.
  • the solution still has the problems of low connection strength, poor self-locking performance and small bearing capacity.
  • the object of the present invention is to provide a conical external thread and threaded hole connection structure with reasonable design, simple structure, good connection performance and locking performance.
  • the tapered external thread and the threaded hole connecting structure comprise external threads and internal threads which are mutually threaded, and the external thread is disposed on the column body, the inside The thread is disposed in the connecting hole, wherein the external thread comprises an outer spiral surface and an end spiral surface, and the outer spiral surface has a shape and a right angle trapezoidal right angle side which coincides with the central axis of the column body;
  • the shape of the outer surface of the spiral formed by the uniform rotation of the right-angled trapezoid while moving axially along the central axis of the column body is the same, the end screw
  • the shape of the surface of the knob is the same as the shape of the end surface of the spiral at the end of the axial movement direction of the above-mentioned body, and the crest of the internal thread is in contact with the outer spiral surface and/or the end spiral surface.
  • the tapered external thread and the threaded hole connection structure cooperate with each other when the crest of the internal thread is in contact with the outer spiral surface and/or the end spiral surface, and the connection performance, the locking performance, the locking property, the bearing performance and the sealing performance, etc.
  • the technical performance is achieved by the contact of the crest of the internal thread with the outer helical surface and/or the end helical surface until the interference is achieved, that is, the crest of the internal thread is in contact with the outer helical surface and/or the end helical surface at the spiral guide.
  • the inner and outer diameters are centered until the crests of the internal threads are in contact with the outer spiral surface and/or the end spiral surface, thereby achieving the connection performance, the locking performance, the locking performance, the bearing performance and the sealing performance of the mechanical fastening mechanism.
  • Technical performance Therefore, the technical performance of the mechanical fastening mechanism of the tapered external thread and the threaded hole connection structure, the locking force of the self-locking, the anti-loose ability, the sealing performance, and the like are independent of the size of the spiral guiding angle. It is related to the taper angle of the outer spiral surface.
  • the technical properties of the joint structure such as locking performance, anti-loosening performance, load-bearing performance and sealing performance mainly depend on the taper angle of the outer spiral surface and the material material of the columnar body.
  • the coefficient of friction is related, in which the end helicoid surface mainly serves as a support.
  • the crest of the internal thread has an interference fit with the outer spiral surface and/or the crest of the internal thread and the end spiral surface are interspersed Cooperate.
  • the crest of the internal thread here has an interference fit with the outer helical surface to achieve a fastening state of the connection structure.
  • one end of the columnar body is screwed into the screwing end of the connecting hole, and the small diameter end of each spiral of the end spiral surface faces the column body The screw-in end.
  • one end of the columnar body is screwed into the screwing end of the connecting hole, and the large diameter end of each of the end spiral faces is oriented toward the columnar shape The screw-in end of the body.
  • the outer spiral Both the face and end helicoids are continuous helicoids or non-continuous helicoids; the internal threads are continuous helicoids or non-continuous helicoids.
  • the outer spiral surface, the end spiral surface and the inner thread are continuous spiral surfaces, which can improve the firmness of the connection structure.
  • the internal thread includes any one of a triangular thread, a trapezoidal thread, a rectangular thread, and a circular arc thread.
  • the internal thread structure is not limited to the above, and other internal threads suitable for the connection structure may also be employed.
  • the right angle trapezoidal axial movement distance when the right angle trapezoid is rotated at a constant speed is at least one time of the length of the right angle side of the right angle trapezoid.
  • the right angle trapezoidal axial movement distance when the right angle trapezoid is rotated at a uniform speed is equal to the right angle side length of the right angle trapezoid.
  • This structure ensures that the outer spiral surface has a sufficient length to ensure that the outer spiral surface has sufficient strength when mated with the internal thread.
  • a transition guide surface is connected between the joint of the outer spiral surface and the end spiral surface of the same spiral.
  • the transition guide surface makes the outer spiral surface and the end spiral surface easy to process, and a spirally distributed outer thread line is formed between the adjacent two outer spiral surfaces, where the highest point of the outer thread line is perpendicular to the lowest point, That is, the angle formed between the slope of the highest point and the lowest point of the outer spiral line and the axis of the thread, that is, the height of the outer spiral guide angle is much smaller than the height of all the current thread-shaped angles, and the thread structure is more compact.
  • the strength is higher, the thread bearing capacity is large, and the mechanical sealing performance is good.
  • the physical space of the taper external thread processing is more spacious.
  • one end of the columnar body is provided with a head having a size larger than the outer diameter of the columnar body, and the connecting hole is a threaded hole provided on the nut. That is, the columnar body and the head are connected as bolts, and the connecting holes are Set inside the nut.
  • the advantages of the tapered external thread and the threaded hole connection structure are: the design is reasonable, the structure is simple, and the fastening and connecting functions are realized by the inner and outer cone sizing to the interference fit, and the operation is convenient and the locking is tight. Strong force, large bearing capacity, good anti-loose performance, good mechanical sealing effect, good stability, can prevent loosening when connecting, and has self-locking function.
  • FIG. 1 is a schematic structural view of a first embodiment of the present invention.
  • Fig. 2 is a structural exploded view of the first embodiment of the present invention.
  • FIG. 3 is a schematic structural view of Embodiment 2 provided by the present invention.
  • the tapered external thread and the threaded hole connection structure include an external thread 5 and an internal thread 6 which are screwed with each other, the external thread 5 is disposed on the column body 1, and the internal thread 6 is disposed in the connecting hole 2
  • a head portion 14 having a size larger than the outer diameter of the columnar body 1 may be provided at one end of the columnar body 1, and then the connecting hole 2 is a threaded hole provided on the nut 3, that is, the columnar body 1 and the head here.
  • the connecting hole 2 is disposed in the nut, wherein the external thread 5 includes an outer spiral surface 11 and an end spiral surface 12, and the outer spiral surface 11 is shaped to coincide with the central axis of the cylindrical body 1
  • the right-angled trapezoidal right-angled side is a uniform rotation in the circumferential direction of the center of rotation, and the right-angled trapezoid is simultaneously moved axially along the central axis of the column-shaped body 1 to form the same shape of the spiral outer side surface of the rotating body, and the shape of the end-helical surface 12 and the above-mentioned rotating body axis
  • the shape of the end surface of the spiral end in the same direction of movement is the same, and the crest 61 of the internal thread 6 is in contact with the outer spiral surface 11 and/or the end spiral surface 12, and the external thread of the tapered outer thread and the screw hole are in use.
  • the crests 61 are in contact with the outer spiral surface 11 and/or the end spiral surface 12, and the technical properties such as the connection performance, the locking performance, the anti-loosening property, the bearing property and the sealing performance are the crests 61 passing through the internal thread 6.
  • the technical performance of the mechanical fastening mechanism of the tapered external thread and the threaded hole connection structure, the locking force of the self-locking, the anti-loose ability, the sealing performance, and the like are independent of the size of the spiral guiding angle. It is related to the size of the taper angle ⁇ of the outer spiral surface 11, in other words, the technical properties of the joint structure such as locking performance, anti-loosening property, load-bearing property and sealing performance mainly depend on the taper angle ⁇ of the outer spiral surface 11 and also the columnar shape.
  • the material material of the body 1 is related to the coefficient of friction, wherein the end helical surface 12 mainly serves as a support.
  • one end of the column-shaped body 1 can be screwed into the screw-in end of the connecting hole 2, and the small-diameter end of each of the end spiral faces 12 is screwed toward the column-shaped body 1 respectively.
  • the crest 61 of the internal thread 6 is in interference fit with the outer helical surface 11 and/or the crest 61 of the internal thread 6 is in an interference fit with the end helical surface 12, preferably, here
  • the crest 61 of the thread 6 is interference-fitted with the outer helical surface 11 to achieve a fastening state of the present connection structure.
  • the outer spiral surface 11 and the end spiral surface 12 are continuous spiral surfaces or non-continuous spiral surfaces; the internal threads 6 are continuous spiral surfaces or non-continuous spiral surfaces.
  • the outer snail here The rotary surface 11, the end spiral surface 12 and the internal thread 6 are both continuous spiral surfaces, which can improve the firmness of the connection structure.
  • any one of a triangular thread, a trapezoidal thread, a rectangular thread, and a circular thread can be used.
  • the structure of the internal thread 6 is not limited to the above, and the other is suitable for the connection structure. Thread 6 can also be used.
  • the right angle trapezoidal rotation speed is one time
  • the distance of the right angle trapezoidal axial movement is at least one time of the right angle side of the right angle trapezoid; or, the distance of the right angle trapezoidal axial movement when the right angle trapezoid is rotated once a week. It is equal to the length of the right-angled side of the right-angled trapezoid, which ensures that the outer spiral surface 11 has a sufficient length to ensure sufficient strength when the outer spiral surface 11 is engaged with the internal thread 6.
  • the joint between the outer spiral surface 11 and the end spiral surface 12 of the same spiral is connected by a transition guide surface 13 which makes the outer spiral surface 11 and the end spiral surface 12 easy to process, and adjacent two outer sides
  • a helically distributed external thread 4 is formed between the helicoids 11 , wherein the vertical distance between the highest point and the lowest point of the externally threaded wire 4, that is, between the inclined point and the thread axis formed by the highest point and the lowest point of the outer spiral 4
  • the angle formed that is, the height of the outer spiral guiding angle ⁇ , is much smaller than the height of all current threading tool angles, the thread structure is more compact, the strength is higher, the thread bearing capacity is large, and the mechanical sealing performance is good.
  • the taper external thread processing physical space is more spacious.
  • the structure, the principle, and the implementation steps of the embodiment are similar to those of the first embodiment.
  • the difference is that one end of the columnar body 1 in this embodiment is screwed into the connecting hole 2.
  • the large diameter end of each of the spirals in the end helix surface 12 faces the screw-in end of the columnar body 1, respectively.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Abstract

一种锥形外螺纹与螺纹孔连接结构，包括外螺纹（5）与内螺纹（6），外螺纹（5）包括外侧螺旋面（11）和端螺旋面（12），外侧螺旋面（11）的形状与以重合于柱状本体（1）中轴线的直角梯形直角边为回转中心周向匀速回转且该直角梯形同时沿柱状本体中轴线匀速轴向移动而形成的回旋体的螺旋外侧面形状相同，端螺旋面（12）的形状与回旋体轴向移动方向一致一端的螺旋端面的形状相同，内螺纹（6）的牙顶（61）与外侧螺旋面（11）和/或端螺旋面（12）相接触。该连接结构通过内外圆锥定径直至过盈配合来实现紧固和连接功能，锁紧力大，承力值大，防松性能良好，机械密封效果好，能防止连接时出现松脱现象，具有自锁功能，解决了现有螺纹连接结构副自锁能力差等技术问题。

Description

锥形外螺纹与螺纹孔连接结构 技术领域
本发明属于螺纹技术领域，尤其是涉及一种锥形外螺纹与螺纹孔连接结构。
背景技术
在圆柱或圆锥母体表面上，沿着螺旋线形成的具有规定截面形状的连续凸起称为螺纹，螺纹是最早实现标准化的机械结构要素，在各行各业中应用广泛。螺纹的种类和形式较多，在圆柱表面形成的螺纹称为圆柱螺纹，在圆锥表面形成的螺纹称为圆锥螺纹，在圆柱或圆锥台体等端面表面形成的螺纹称为平面螺纹；在母体外圆表面形成的螺纹称为外螺纹，在母体内圆孔表面形成的螺纹称为内螺纹，在母体端面表面形成的螺纹称为端面螺纹；旋向与螺纹升角方向符合左手定则的螺纹称为左旋螺纹，旋向与螺纹升角方向符合右手定则的螺纹称为右旋螺纹；在母体同一截面内只有一条螺旋线的螺纹称为单线螺纹，有两条螺旋线的螺纹称为双线螺纹，有多条螺旋线的螺纹称为多线螺纹；截面形状为三角形的螺纹称为三角形螺纹，截面形状为梯形的螺纹称为梯形螺纹，截面形状为矩形的螺纹称为矩形螺纹，截面形状为锯齿形的螺纹称为锯齿形螺纹；用于结构紧固连接的螺纹称为紧固连接螺纹，主要用于机构传动、也可用于紧固连接的螺纹称为传动连接螺纹，用于管道连接的螺纹称为管螺纹。
紧固件螺纹属于紧固连接螺纹，一般是圆柱螺纹，截面形状为三角形；通常采用右旋螺纹，有特殊要求时才采用左旋螺纹；一般采用单线螺纹，有快速装拆要求时才采用双线螺纹或多线螺 纹。紧固件螺纹由内、外螺纹紧固件组成螺纹副使用，其配合性质取决于连接系统的要求。紧固件对螺纹的基本要求是承力和自锁而非传动。螺纹自锁的基本条件是：当量摩擦角不得小于螺旋升角。而当量摩擦角的大小与牙型角有关，牙型角越大，当量摩擦角越大，越有利于螺纹自锁。这就是紧固件螺纹的牙型角多选用60°的基本原因。近年来出现的楔形螺纹，又称“施必牢螺母”，是对米制螺纹和英制螺纹这两类基本紧固件螺纹类型的改进，目的是提高紧固件螺纹的自锁性能。米制螺纹包括普通螺纹(M螺纹)、米制航空航天螺纹(MJ螺纹)、米制小螺纹(S螺纹)和俄制螺纹(MR螺纹)等；英制螺纹包括英制统一螺纹(UN螺纹)、英制航空航天螺纹(UNJ螺纹)及英制惠氏螺纹等，除英制惠氏螺纹采用55°牙型角外，其他螺纹都采用60°牙型角。
螺纹紧固件的松脱问题的关键在于螺纹的结构形状。为此，美国工程师在研究了紧固件螺纹的形状及受力情况后，重新设计螺纹的几何形状，于本世纪70年代末发明了这种现在被称为“施必牢”的螺纹技术。它的结构是，在阴螺纹(内三角形螺纹，即螺母螺纹)的牙底处有一个30°的楔形斜面，当螺栓与螺母相互拧紧时，标准螺栓的外螺纹牙尖就紧紧地顶在内螺纹的楔形斜面上，产生螺纹干扰锁紧从而增加锁紧力。这种锁紧力的增加，也是由于牙型的角度改变，使施加在螺纹间接触所产生的法向力，与螺栓轴成60°角，而不是普通螺纹那样的30°角。显然施必牢螺纹法向力，要远远大于扣紧压力，因此，所产生的防松摩擦力大大增加。一直以来，人们都是从螺纹牙型角这个技术层面和这样一个技术方向去研究和解决螺纹紧固件松脱问题，楔形螺纹技术也不例外，而且楔形螺纹只是三角形螺纹的三角形牙型的局部变形，不能组成楔形螺纹螺纹副使用，楔形螺纹只能用于螺母螺纹与三角形螺纹的外螺纹组成螺纹副使用，且锁紧力也是基于螺纹牙型 角之大小，与常规螺纹技术承力和自锁技术原理一样。现有现有的螺纹紧固件的螺栓或螺母存在着容易松动的缺陷，随着设备频繁的震动连接件的间隙增大，引起螺栓与螺母松动，甚至脱落，这样对于一些机械连接时易发生连接体相互脱离现象，严重的容易发生安全事故。
为了解决现有技术存在的问题，人们进行了长期的探索，提出了各式各样的解决方案。例如，中国专利文献公开了一种自锁螺旋线螺纹紧固件[申请号：200520045825.1]，包括相互螺纹连接的螺栓和螺母,所述螺母内设有阴螺纹,其特征在于,所述阴螺纹的牙底处设有楔型斜面,所述螺栓阳螺纹的牙尖抵靠在楔型斜面上。楔型斜面与螺母中心线呈30度角。本实用新型通过在阴螺纹的牙底处设有的楔形斜面。
上述方案在一定程度上改进了现有紧固件连接时易松动的问题，但是，该方案依然存在连接强度低，自锁性能差，承力值小的问题。
发明内容
本发明的目的是针对上述问题，提供一种设计合理、结构简单，具有良好的连接性能、锁紧性能的锥形外螺纹与螺纹孔连接结构。
为达到上述目的，本发明采用了下列技术方案：本锥形外螺纹与螺纹孔连接结构，包括相互螺纹配合的外螺纹与内螺纹，所述的外螺纹设置在柱状本体上，所述的内螺纹设置在连接孔内，其特征在于，所述的外螺纹包括外侧螺旋面和端螺旋面，所述的外侧螺旋面的形状与以重合于柱状本体中轴线的直角梯形直角边为回转中心周向匀速回转且该直角梯形同时沿柱状本体中轴线匀速轴向移动而形成的回旋体的螺旋外侧面形状相同，所述的端螺 旋面的形状与上述回旋体轴向移动方向一致一端的螺旋端面的形状相同，所述的内螺纹的牙顶与外侧螺旋面和/或端螺旋面相接触。本锥形外螺纹与螺纹孔连接结构在使用时内螺纹的牙顶与外侧螺旋面和/或端螺旋面相接触相互配合，其连接性能、锁紧性能、防松性能、承载性能和密封性能等技术性能是通过内螺纹的牙顶与外侧螺旋面和/或端螺旋面相接触定径直至过盈实现的，即内螺纹的牙顶与外侧螺旋面和/或端螺旋面相接触在螺旋线的引导下内外径定心直至内螺纹的牙顶与外侧螺旋面和/或端螺旋面相接触过盈接触，从而实现机械紧固机构的连接性能、锁紧性能、防松性能、承载性能和密封性能等技术性能。因此，本锥形外螺纹与螺纹孔连接结构机械紧固机构承力能力大小、自锁之锁紧力大小、防松能力大小、密封性能好坏等技术性能与螺旋线导向角之大小无关，与外侧螺旋面的锥角大小有关，换言之，即该连接结构锁紧性能、防松性能、承载性能以及密封性能等技术性能，主要取决于外侧螺旋面的锥角，也与柱状本体的材料材质摩擦系数有关，其中端螺旋面主要起支承作用。
在上述的锥形外螺纹与螺纹孔连接结构中，所述的内螺纹的牙顶与所述外侧螺旋面过盈配合和/或所述的内螺纹的牙顶与所述端螺旋面过盈配合。优选地，这里的内螺纹的牙顶与外侧螺旋面过盈配合从而实现本连接结构的紧固状态。
在上述的锥形外螺纹与螺纹孔连接结构中，所述的柱状本体的一端为旋入所述连接孔的旋入端，所述的端螺旋面中每一螺旋的小径端分别朝向柱状本体的旋入端。
在上述的锥形外螺纹与螺纹孔连接结构中，所述的柱状本体的一端为旋入所述连接孔的旋入端，所述的端螺旋面中每一螺旋的大径端分别朝向柱状本体的旋入端。
在上述的锥形外螺纹与螺纹孔连接结构中，所述的外侧螺旋 面和端螺旋面均为连续螺旋面或非连续螺旋面；所述的内螺纹为连续螺旋面或非连续螺旋面。优选地，这里的外侧螺旋面、端螺旋面与内螺纹均为连续螺旋面，这样能提高本连接结构的牢固性。
在上述的锥形外螺纹与螺纹孔连接结构中，所述的内螺纹包括三角形螺纹、梯形螺纹、矩形螺纹、圆弧螺纹中的任意一种。当然，内螺纹结构并不局限于上述几种，其他适用于本连接结构的内螺纹亦可以采用。
在上述的锥形外螺纹与螺纹孔连接结构中，所述的直角梯形匀速回转一周时所述的直角梯形轴向移动的距离为直角梯形的直角边长度的至少一倍。该结构保证了外侧螺旋面具有足够长度，从而保证外侧螺旋面与内螺纹配合时具有足够强度。
在上述的锥形外螺纹与螺纹孔连接结构中，所述的直角梯形匀速回转一周时所述的直角梯形轴向移动的距离等于直角梯形的直角边长度。该结构保证了外侧螺旋面具有足够长度，从而保证外侧螺旋面与内螺纹配合时具有足够强度。
在上述的锥形外螺纹与螺纹孔连接结构中，同一螺旋的外侧螺旋面和端螺旋面的结合处之间采用过渡导面相连。该过渡导面使得外侧螺旋面和端螺旋面便于加工，且相邻两个外侧螺旋面之间形成呈螺旋状分布的外螺纹线，这里的外螺纹线的最高点与最低点的垂直距离，即外螺旋线最高点与最低点形成的斜面与螺纹轴线之间形成的夹角，即外螺旋线导向角的高度，要远远小于目前所有螺纹技术牙型角的高度，螺纹结构更加紧凑，强度更高，螺纹承力值大，具备良好的机械密封性能，锥形外螺纹加工物理空间更宽敞。
在上述的锥形外螺纹与螺纹孔连接结构中，所述的柱状本体的一端设有尺寸大于柱状本体外径的头部，所述的连接孔为设于螺母上的螺纹孔。即这里的柱状本体与头部连接为螺栓，连接孔 设置在螺母内。
与现有的技术相比，本锥形外螺纹与螺纹孔连接结构的优点在于：设计合理，结构简单，通过内外圆锥定径直至过盈配合来实现紧固和连接功能，操作方便，锁紧力大，承力值大，防松性能良好，机械密封效果好，稳定性好，能防止连接时出现松脱现象，具有自锁功能。
附图说明
图1是本发明提供的实施例一的结构示意图。
图2是本发明提供的实施例一的结构爆炸图。
图3是本发明提供的实施例二的结构示意图。
图4是本发明提供的实施例二的结构爆炸图。
图中，柱状本体1、连接孔2、外侧螺旋面11、端螺旋面12、过渡导面13、头部14、螺母3、外螺纹线4、外螺纹5、内螺纹6、牙顶61、锥角α、外螺旋线导向角β。
具体实施方式
下面结合附图和具体实施方式对本发明做进一步详细的说明。
实施例一
如图1-2所示，本锥形外螺纹与螺纹孔连接结构，包括相互螺纹配合的外螺纹5与内螺纹6，外螺纹5设置在柱状本体1上，内螺纹6设置在连接孔2内，可以在柱状本体1的一端设有尺寸大于柱状本体1外径的头部14，紧接着，这里的连接孔2为设于螺母3上的螺纹孔，即这里的柱状本体1与头部14连接为螺栓，连接孔2设置在螺母内，其中，外螺纹5包括外侧螺旋面11和端螺旋面12，外侧螺旋面11的形状与以重合于柱状本体1中轴线 的直角梯形直角边为回转中心周向匀速回转且该直角梯形同时沿柱状本体1中轴线匀速轴向移动而形成的回旋体的螺旋外侧面形状相同，端螺旋面12的形状与上述回旋体轴向移动方向一致一端的螺旋端面的形状相同，内螺纹6的牙顶61与外侧螺旋面11和/或端螺旋面12相接触，本锥形外螺纹与螺纹孔连接结构在使用时内螺纹6的牙顶61与外侧螺旋面11和/或端螺旋面12相接触相互配合，其连接性能、锁紧性能、防松性能、承载性能和密封性能等技术性能是通过内螺纹6的牙顶61与外侧螺旋面11和/或端螺旋面12相接触定径直至过盈实现的，即内螺纹6的牙顶61与外侧螺旋面11和/或端螺旋面12相接触在螺旋线的引导下内外径定心直至内螺纹6的牙顶61与外侧螺旋面11和/或端螺旋面12相接触过盈接触，从而实现机械紧固机构的连接性能、锁紧性能、防松性能、承载性能和密封性能等技术性能。因此，本锥形外螺纹与螺纹孔连接结构机械紧固机构承力能力大小、自锁之锁紧力大小、防松能力大小、密封性能好坏等技术性能与螺旋线导向角之大小无关，与外侧螺旋面11的锥角α大小有关，换言之，即该连接结构锁紧性能、防松性能、承载性能以及密封性能等技术性能，主要取决于外侧螺旋面11的锥角α，也与柱状本体1的材料材质摩擦系数有关，其中端螺旋面12主要起支承作用。
具体地，本实施例中，在使用时可以将柱状本体1的一端作为旋入所述连接孔2的旋入端，端螺旋面12中每一螺旋的小径端分别朝向柱状本体1的旋入端，紧接着，当内螺纹6的牙顶61与所述外侧螺旋面11过盈配合和/或内螺纹6的牙顶61与所述端螺旋面12过盈配合，优选地，这里的内螺纹6的牙顶61与外侧螺旋面11过盈配合从而实现本连接结构的紧固状态。其中，这里的外侧螺旋面11和端螺旋面12均为连续螺旋面或非连续螺旋面；内螺纹6为连续螺旋面或非连续螺旋面。优选地，这里的外侧螺 旋面11、端螺旋面12与内螺纹6均为连续螺旋面，这样能提高本连接结构的牢固性。至于，内螺纹6的结构可以采用三角形螺纹、梯形螺纹、矩形螺纹、圆弧螺纹中的任意一种，当然，内螺纹6的结构并不局限于上述几种，其他适用于本连接结构的内螺纹6亦可以采用。
进一步地，本实施例中的直角梯形匀速回转一周时直角梯形轴向移动的距离为直角梯形的直角边长度的至少一倍；或者，这里的直角梯形匀速回转一周时直角梯形轴向移动的距离等于直角梯形的直角边长度，这样保证了外侧螺旋面11具有足够长度，从而保证外侧螺旋面11与内螺纹6配合时具有足够强度。其中，同一螺旋的外侧螺旋面11和端螺旋面12的结合处之间采用过渡导面13相连，该过渡导面13使得外侧螺旋面11和端螺旋面12便于加工，且相邻两个外侧螺旋面11之间形成呈螺旋状分布的外螺纹线4，这里的外螺纹线4的最高点与最低点的垂直距离，即外螺旋线4最高点与最低点形成的斜面与螺纹轴线之间形成的夹角，即外螺旋线导向角β的高度，要远远小于目前所有螺纹技术牙型角的高度，螺纹结构更加紧凑，强度更高，螺纹承力值大，具备良好的机械密封性能，锥形外螺纹加工物理空间更宽敞。
实施例二
如图3-4所示，本实施例的结构、原理以及实施步骤与实施例一类似，不同的地方在于，本实施例中的柱状本体1的一端为旋入所述连接孔2的旋入端，端螺旋面12中每一螺旋的大径端分别朝向柱状本体1的旋入端。
本文中所描述的具体实施例仅仅是对本发明精神作举例说明。本发明所属技术领域的技术人员可以对所描述的具体实施例做各种各样的修改或补充或采用类似的方式替代，但并不会偏离本发明的精神或者超越所附权利要求书所定义的范围。
尽管本文较多地使用了柱状本体1、连接孔2、外侧螺旋面11、端螺旋面12、过渡导面13、头部14、螺母3、外螺纹线4、外螺纹5、内螺纹6、牙顶61、锥角α、外螺旋线导向角β等术语，但并不排除使用其它术语的可能性。使用这些术语仅仅是为了更方便地描述和解释本发明的本质；把它们解释成任何一种附加的限制都是与本发明精神相违背的。

Claims (10)

  1. 一种锥形外螺纹与螺纹孔连接结构，包括相互螺纹配合的外螺纹(5)与内螺纹(6)，所述的外螺纹(5)设置在柱状本体(1)上，所述的内螺纹(6)设置在连接孔(2)内，其特征在于，所述的外螺纹(5)包括外侧螺旋面(11)和端螺旋面(12)，所述的外侧螺旋面(11)的形状与以重合于柱状本体(1)中轴线的直角梯形直角边为回转中心周向匀速回转且该直角梯形同时沿柱状本体(1)中轴线匀速轴向移动而形成的回旋体的螺旋外侧面形状相同，所述的端螺旋面(12)的形状与上述回旋体轴向移动方向一致一端的螺旋端面的形状相同，所述的内螺纹(6)的牙顶(61)与外侧螺旋面(11)和/或端螺旋面(12)相接触。
  2. 根据权利要求1所述的锥形外螺纹与螺纹孔连接结构，其特征在于，所述的内螺纹(6)的牙顶(61)与所述外侧螺旋面(11)过盈配合和/或所述的内螺纹(6)的牙顶(61)与所述端螺旋面(12)过盈配合。
  3. 根据权利要求1或2所述的锥形外螺纹与螺纹孔连接结构，其特征在于，所述的柱状本体(1)的一端为旋入所述连接孔(2)的旋入端，所述的端螺旋面(12)中每一螺旋的小径端分别朝向柱状本体(1)的旋入端。
  4. 根据权利要求1或2所述的锥形外螺纹与螺纹孔连接结构，其特征在于，所述的柱状本体(1)的一端为旋入所述连接孔(2)的旋入端，所述的端螺旋面(12)中每一螺旋的大径端分别朝向柱状本体(1)的旋入端。
  5. 根据权利要求1或2所述的锥形外螺纹与螺纹孔连接结构，其特征在于，所述的外侧螺旋面(11)和端螺旋面(12)均为连续螺旋面或非连续螺旋面；所述的内螺纹(6)为连续螺旋面或非连续螺旋面。
  6. 根据权利要求1或2所述的锥形外螺纹与螺纹孔连接结构，其特征在于，所述的内螺纹(6)包括三角形螺纹、梯形螺纹、矩 形螺纹、圆弧螺纹中的任意一种。
  7. 根据权利要求1或2所述的锥形外螺纹与螺纹孔连接结构，其特征在于，所述的直角梯形匀速回转一周时所述的直角梯形轴向移动的距离为直角梯形的直角边长度的至少一倍。
  8. 根据权利要求7所述的锥形外螺纹与螺纹孔连接结构，其特征在于，所述的直角梯形匀速回转一周时所述的直角梯形轴向移动的距离等于直角梯形的直角边长度。
  9. 根据权利要求7所述的锥形外螺纹与螺纹孔连接结构，其特征在于，同一螺旋的外侧螺旋面(11)和端螺旋面(12)的结合处之间采用过渡导面(13)相连。
  10. 根据权利要求1或2所述的锥形外螺纹与螺纹孔连接结构，其特征在于，所述的柱状本体(1)的一端设有尺寸大于柱状本体(1)外径的头部(14)，所述的连接孔(2)为设于螺母(3)上的螺纹孔。
PCT/CN2016/107052 2015-11-24 2016-11-24 锥形外螺纹与螺纹孔连接结构 WO2017088788A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15/987,910 US10527082B2 (en) 2015-11-24 2018-05-24 Connection structure for tapered male screw and threaded hole

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201510821486.X 2015-11-24
CN201510821486.XA CN105443542B (zh) 2015-11-24 2015-11-24 锥形外螺纹与螺纹孔连接结构

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US15/987,910 Continuation US10527082B2 (en) 2015-11-24 2018-05-24 Connection structure for tapered male screw and threaded hole

Publications (1)

Publication Number Publication Date
WO2017088788A1 true WO2017088788A1 (zh) 2017-06-01

Family

ID=55554078

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2016/107052 WO2017088788A1 (zh) 2015-11-24 2016-11-24 锥形外螺纹与螺纹孔连接结构

Country Status (3)

Country Link
US (1) US10527082B2 (zh)
CN (1) CN105443542B (zh)
WO (1) WO2017088788A1 (zh)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105443542B (zh) 2015-11-24 2018-06-15 游奕华 锥形外螺纹与螺纹孔连接结构
WO2019192576A1 (zh) * 2018-04-07 2019-10-10 游奕华 类哑铃状非对称双向锥形螺纹内螺纹与传统螺纹连接结构
WO2019192548A1 (zh) * 2018-04-07 2019-10-10 玉环胜友工具有限公司 橄榄状锥度左大右小非对称双向锥形螺纹连接副
WO2019192559A1 (zh) * 2018-04-07 2019-10-10 玉环胜友工具有限公司 类橄榄状非对称双向锥形螺纹的螺栓与螺母连接结构
WO2019192550A1 (zh) * 2018-04-07 2019-10-10 玉环胜友工具有限公司 橄榄状锥度左大右小双向锥形外螺纹与传统螺纹连接结构
CN109281999B (zh) * 2018-11-07 2023-09-01 段沧桑 一种综合自锁机构
CN109483042B (zh) * 2018-11-16 2021-08-17 首都航天机械有限公司 一种自锁式摩擦塞补焊方法
CN113814992B (zh) * 2021-09-23 2023-02-10 深圳市奔凯安全技术股份有限公司 一种具备实时影像功能的巡逻机器人

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987007928A1 (en) * 1986-06-19 1987-12-30 Harald Kolvereid Combi-nut
CN1031587A (zh) * 1987-05-27 1989-03-08 哈罗德·科尔弗雷德 固定装置及其紧固工具
US5413388A (en) * 1990-01-31 1995-05-09 Kolvereid; Harald Compression-type pipe joint using threaded clamp having longitudinally slotted inner sleeve
CN203847533U (zh) * 2014-05-15 2014-09-24 天津冶金集团轧三钢铁有限公司 一种单向螺纹连接结构
CN105443542A (zh) * 2015-11-24 2016-03-30 游奕华 锥形外螺纹与螺纹孔连接结构
CN205349975U (zh) * 2015-11-24 2016-06-29 游奕华 锥形外螺纹与螺纹孔连接结构

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1876565A (en) * 1932-09-13 of canton
US1090976A (en) * 1912-08-01 1914-03-24 Arthur R Encinas Lock-nut.
US1523463A (en) * 1923-02-15 1925-01-20 Thomson John Water-meter frost bolt
US1953095A (en) * 1931-07-18 1934-04-03 Timken Roller Bearing Co Detachable bit
US2016610A (en) * 1934-06-16 1935-10-08 Moeller Isak Bolt
US2036604A (en) * 1935-02-16 1936-04-07 George B Pickop Bolt and nut
US2895367A (en) * 1954-07-19 1959-07-21 Pastushin Aviat Corp Self-broaching fasteners
US3151653A (en) * 1959-06-17 1964-10-06 Victor F Zahodfakin Quick-locking fastening device
US3439722A (en) * 1966-08-15 1969-04-22 Ira M Brandon Nut and bolt assembly
US3586353A (en) * 1969-01-13 1971-06-22 Howard I Lorenz Thread arrangement for earth boring members
US3887990A (en) * 1972-12-11 1975-06-10 Floyd Leroy Wilson Method of securing two members together with a fastener
DE3564005D1 (en) * 1985-01-17 1988-09-01 Weidmann H Ag Anchor for wall consolidation in cavity structures
US4712955A (en) * 1985-05-14 1987-12-15 Rexnord Inc. Expandable fastener assembly
US5964766A (en) * 1993-12-27 1999-10-12 Biolok International, Inc. Buttress thread implant
DE19505311C2 (de) * 1995-02-17 2002-04-11 Lautenschlaeger Mepla Werke Befestigungsanordnung von Beschlägen, insbesondere Möbelbeschlägen an Möbelstücken
CH706003A2 (fr) * 2011-11-15 2013-06-14 Dc Swiss Sa Système d'assemblage fileté autobloquant.
CH708049A2 (fr) * 2013-05-14 2014-11-14 Safelock Sa Système d'assemblage fileté autobloquant.
CN203756694U (zh) * 2013-12-26 2014-08-06 上海底特精密紧固件股份有限公司 一种防止松动的螺纹紧固件

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987007928A1 (en) * 1986-06-19 1987-12-30 Harald Kolvereid Combi-nut
CN1031587A (zh) * 1987-05-27 1989-03-08 哈罗德·科尔弗雷德 固定装置及其紧固工具
US5413388A (en) * 1990-01-31 1995-05-09 Kolvereid; Harald Compression-type pipe joint using threaded clamp having longitudinally slotted inner sleeve
CN203847533U (zh) * 2014-05-15 2014-09-24 天津冶金集团轧三钢铁有限公司 一种单向螺纹连接结构
CN105443542A (zh) * 2015-11-24 2016-03-30 游奕华 锥形外螺纹与螺纹孔连接结构
CN205349975U (zh) * 2015-11-24 2016-06-29 游奕华 锥形外螺纹与螺纹孔连接结构

Also Published As

Publication number Publication date
CN105443542A (zh) 2016-03-30
US20180266472A1 (en) 2018-09-20
CN105443542B (zh) 2018-06-15
US10527082B2 (en) 2020-01-07

Similar Documents

Publication Publication Date Title
WO2017088787A1 (zh) 锥形内螺纹与螺纹柱连接结构
WO2017088788A1 (zh) 锥形外螺纹与螺纹孔连接结构
WO2017088786A1 (zh) 锥形螺纹螺栓体以及锥形螺纹螺母
WO2017088785A1 (zh) 锥形螺纹连接副
CN205315435U (zh) 锥形螺纹螺栓体以及锥形螺纹螺母
WO2015000318A1 (zh) 防松动螺纹件
WO2020237910A1 (zh) 一种防松螺杆螺母组件
US20210010518A1 (en) Connection pair for symmetric bidirectional tapered thread in olive-like shape
CN205349976U (zh) 锥形螺纹连接副
CN205349975U (zh) 锥形外螺纹与螺纹孔连接结构
CN205331169U (zh) 锥形内螺纹与螺纹柱连接结构
WO2015000317A1 (zh) 一种防松动圆柱螺纹件
US20210010528A1 (en) Connection pair of threads outlining asymmetrically and bidirectional tapered dumbbell-like shape having smaller-end conical degree
WO2015000316A1 (zh) 防松动圆柱螺纹件
US20210010505A1 (en) Connection structure of bolt and nut of asymmetric bidirectional tapered thread in olive-like shape
US20210010526A1 (en) Connection structure of external thread of symmetric bidirectional tapered thread in olive-like shape and traditional screw thread
CN214331123U (zh) 类橄榄状非对称双向锥形螺纹内螺纹与传统螺纹连接结构
US20210010519A1 (en) Connection structure of internal thread of asymmetric bidirectional tapered thread in olive-like shape and traditional screw thread
US20210025429A1 (en) Connection structure of internal thread of symmetric bidirectional tapered thread in olive-like shape and traditional screw thread
CN213744403U (zh) 类橄榄状非对称双向锥形螺纹的螺栓与螺母连接结构
WO2019192579A1 (zh) 一种合成圆锥副和螺旋技术特点的双向锥形螺纹技术
CN213628386U (zh) 类橄榄状对称双向锥形螺纹的螺栓与螺母连接结构
US20210010506A1 (en) Connection structure of external thread of asymmetric bidirectional tapered thread in olive-like shape and traditional screw thread
CN213628385U (zh) 类橄榄状非对称双向锥形螺纹外螺纹与传统螺纹连接结构

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16868011

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 25/10/2018)

122 Ep: pct application non-entry in european phase

Ref document number: 16868011

Country of ref document: EP

Kind code of ref document: A1