CN214118679U - Dumbbell-like and olive-like asymmetric bidirectional tapered threaded connection pair - Google Patents

Abstract

The utility model belongs to the technical field of equipment is general, it is vice to relate to class dumbbell form and the asymmetric two-way toper threaded connection of class olive form, solved the poor scheduling problem of current screw thread self-align auto-lock nature, characterized by, internal thread (6) are two-way bell mouth (41) (non-entity space) of tube-shape parent (2) internal surface, external screw thread (9) are two-way frustum body (71) (material entity) of column parent (3) surface, complete cell body screw thread is that left side tapering (95) are greater than right side tapering (96) class dumbbell form (94) and/or are less than right side tapering (96) class olive form (93) two-way cone body, the performance mainly depends on the screw body conical surface and the tapering size of mutually supporting, the advantage: the inner and outer threads are contained by the cone through the taper hole, and a section of cone pair is formed by the bidirectional taper hole (41) and the bidirectional cone frustum (71) to form the thread pair (10) until the inner and outer cones are in spiral conical surface sizing fit or sizing interference to realize the thread connection function.

Description

Dumbbell-like and olive-like asymmetric bidirectional tapered threaded connection pair

Technical Field

The utility model belongs to the technical field of equipment is general, especially, relate to a kind of dumbbell-like and the asymmetric two-way toper threaded connection of class olive form is vice (hereinafter referred to as "two-way toper threaded connection is vice").

Background

The invention of the screw thread has a profound influence on the progress of the human society. The thread is one of the most basic industrial technologies, is not a specific product, is a key common technology of the industry, and the technical performance of the thread needs to be embodied by using the specific product as an application carrier, so that the thread is widely applied in various industries. The existing thread technology has high standardization level, mature technical theory and long-term practical application, and is a fastening thread when used for fastening; the sealing is a sealing thread; the transmission screw is formed by transmission. Thread terminology according to national standards: "thread" means a tooth body with the same tooth type and continuously raised along a spiral line on a cylindrical or conical surface; "dental body" refers to the body of material between adjacent flanks. This is also a globally recognized definition of threads.

Modern threads began in 1841 as uk hui threads. According to the modern thread technical theory, the basic conditions of thread self-locking are as follows: the equivalent friction angle must not be less than the helix angle. The thread is a recognition of the modern thread technology based on the technical principle of the modern thread, namely the inclined plane principle, and becomes an important theoretical basis of the modern thread technology. The first theoretical explanation of the slope principle was steve, who studied the parallelogram law of the equilibrium of the object on the slope and the resultant of forces, he proposed the famous slope law in 1586: the gravity force in the direction of the inclined plane on an object placed on the inclined plane is proportional to the sine of the inclination angle. The inclined plane is a smooth plane inclined with the horizontal plane, the screw is the deformation of the inclined plane, the thread is like the inclined plane wrapped outside the cylinder, the more gentle the inclined plane is, the greater the mechanical benefit is (see figure 7) (Yangshisan, Wang Xiuya, the principle discussion of screws, Gauss arithmetic research).

The 'inclined plane principle' of modern screw thread is an inclined plane sliding block model (see figure 8) established based on an inclined plane law, and people think that under the condition of small static load and temperature change, when a thread lead angle is smaller than or equal to an equivalent friction angle, a screw thread pair has a self-locking condition. The lead angle of the thread (see fig. 9), also known as the lead angle of the thread, is the angle between the tangent to the helix on the pitch diameter cylinder and the plane perpendicular to the axis of the thread, which affects the self-locking and anti-loosening of the thread. The equivalent friction angle is the friction angle corresponding to the final transformation of the different friction forms into the most common bevel slider form. In general, in an inclined plane slider model, when an inclined plane inclines to a certain angle, the friction force of the slider at the moment is just equal to the component of gravity along the inclined plane, the object is just in a stress balance state at the moment, and the inclined plane inclination angle at the moment is called as an equivalent friction angle.

The american engineers developed wedge threads in the middle of the last century, the technical principles of which still followed the "ramp principle". The invention of wedge thread is inspired by "wooden wedge". Specifically, the structure of the wedge-shaped thread is that a wedge-shaped inclined plane which forms an included angle of 25-30 degrees with the axis of the thread is arranged at the root of an internal thread (namely a nut thread) of a triangular thread (commonly called a common thread), and the wedge-shaped inclined plane of 30 degrees is adopted in engineering practice. In the prior art, people research and solve the problems of thread loosening prevention and the like from the technical level and the technical direction of thread profile angles, and the wedge thread technology is not exceptional and is the specific application of the wedge technology.

Modern threads are of various types and forms, and are all thread-type threads, which are determined by the technical principle, namely the inclined plane principle. Specifically, a thread formed on a cylindrical surface is referred to as a cylindrical thread, a thread formed on a conical surface is referred to as a conical thread, and a thread formed on an end surface of a cylinder, a frustum of a cone, or the like is referred to as a flat thread; the thread formed on the surface of the outer circle of the parent body is called an external thread, the thread formed on the surface of the inner circle hole of the parent body is called an internal thread, and the thread formed on the surface of the end face of the parent body is called an end face thread; the threads with the turning direction and the lead angle direction according with the left-hand rule are called left-hand threads, and the threads with the turning direction and the lead angle direction according with the right-hand rule are called right-hand threads; threads with only one helix in the same cross-section of the matrix are referred to as single threads, threads with two helices are referred to as double threads, and threads with multiple helices are referred to as multiple threads. A thread having a triangular cross-sectional shape is called a triangular thread, a thread having a trapezoidal cross-sectional shape is called a trapezoidal thread, a thread having a rectangular cross-sectional shape is called a rectangular thread, and a thread having a saw-tooth cross-sectional shape is called a saw-tooth thread.

However, the existing threads have the problems of low connection strength, weak self-positioning capability, poor self-locking property, small bearing value, poor stability, poor compatibility, poor reusability, high temperature and low temperature and the like, and typically, bolts or nuts applying the modern thread technology generally have the defect of easy loosening, and along with frequent vibration or shock of equipment, the bolts and the nuts are loosened or even fall off, so that safety accidents are seriously easy to happen.

Disclosure of Invention

Any technical theory, with theoretical assumptions background, threads are no exception. Along with the scientific and technological progress, to connecting the more non-static more non-room temperature environment of destruction of having the non-pure linear load, there is the non-linear load of linear load and even the two stack and produce more complicated destruction load condition from this, and the application operating mode is complicated, based on understanding like this, the utility model aims at the above-mentioned problem, provide a reasonable in design, simple structure, have good connection performance, locking performance's class dumbbell shape and the asymmetric two-way toper threaded connection of class olive shape is vice.

In order to achieve the above purpose, the utility model adopts the following technical proposal: the dumbbell-shaped and olive-shaped asymmetric bidirectional tapered thread connection pair is a thread connection pair consisting of asymmetric bidirectional tapered external threads and asymmetric bidirectional tapered internal threads, is a special thread pair technology for synthesizing technical characteristics of a cone pair and a spiral motion, is a thread technology for synthesizing technical characteristics of a bidirectional cone and a spiral structure, consists of two single cones, wherein the two single cones are respectively positioned at the left side and the right side of the bidirectional cone, namely, consists of two single cone bidirectional components with opposite directions and/or opposite directions of left-side taper and right-side taper and different tapers, and is spirally distributed on the outer surface of a cylindrical parent body to form external threads and/or the bidirectional cones are spirally distributed on the inner surface of a cylindrical parent body to form internal threads, the complete unit body thread of the bidirectional tapered thread is of a bidirectional tapered geometric structure and comprises two special bidirectional tapered geometric structure forms of an olive-like shape and a dumbbell-like shape, namely the complete unit body thread of the bidirectional tapered thread comprises the olive-like bidirectional tapered thread and the dumbbell-like bidirectional tapered thread.

The asymmetric bidirectional tapered thread definition of the bidirectional tapered thread connection pair can be expressed as: the cone-shaped body is characterized in that the surface of a cylinder or a cone is provided with asymmetric bidirectional tapered holes (or asymmetric bidirectional cone-shaped bodies) which specify left-side taper and right-side taper, have opposite or opposite directions of the left-side taper and the right-side taper and have different tapers, and spiral special bidirectional tapered geometric bodies which are continuously (or discontinuously) distributed along a spiral line comprise two special bidirectional tapered geometric bodies which are similar to olive and dumbbell. "for manufacturing reasons, the thread head and the thread tail of the asymmetric bidirectional tapered thread may be incomplete bidirectional tapered geometry. Unlike modern thread technology, the number of complete unit body threads and/or incomplete unit body threads is referred to as "bi-directional tapered threads" and "pitch" rather than "full threads", i.e., several threads are referred to as "pitch". The change of the number of the threads is called to occur based on the technical connotation change, and the thread technology is changed from the original meshing relationship of the internal threads and the external threads of the modern threads into the cohesive relationship of the internal threads and the external threads of the bidirectional tapered threads. No matter the internal thread and the external thread, the complete single-section thread of the bidirectional tapered thread has two forms, one is a special bidirectional tapered geometric body which is large in the middle and small at two ends and is similar to an olive shape, and the other is a special bidirectional tapered geometric body which is small in the middle and large at two ends and is similar to a dumbbell shape.

This two-way toper threaded connection is vice, including being the heliciform and distributing in the two-way cone frustum body of column parent surface and being the two-way bell mouth that the heliciform distributes in tube-shape parent internal surface, including screw-thread fit's external screw thread and internal thread each other promptly, what the internal thread distributed is that the two-way bell mouth of heliciform, external screw thread distribute is that be the two-way cone frustum body of heliciform, the internal thread exists in order to be the two-way bell mouth of heliciform (non-entity space) form, the external screw thread exists in order to be the two-way cone frustum body of heliciform (material entity) form, non-entity space mean can hold the space environment of above-mentioned material entity, the internal thread is the container, the external screw thread is by the container, the operating condition of screw thread is: the internal thread and the external thread are one-section two-way conical geometric bodies which are sleeved together in a screwing mode, the internal thread and the external thread are in cohesion until one-side two-way bearing or left-side right-side two-way bearing or sizing interference fit, whether two-way bearing is carried out on two sides simultaneously or not is related to the actual working condition of the application field, namely, the two-way conical hole contains the two-way conical frustum body one section by one section, namely, the internal thread is one-section cohesion corresponding external thread.

The thread connection pair is a thread pair formed by a conical pair formed by mutually matching a spiral outer conical surface and a spiral inner conical surface, a section of conical pair formed by mutually matching a spiral conical hole and a spiral conical frustum is a thread pair, the outer conical surface of the bidirectional conical thread outer cone and the inner conical surface of the inner cone are both bidirectional conical surfaces, when the bidirectional conical threads form a threaded connection pair, the combined surface of the inner conical surface and the outer conical surface is taken as a supporting surface, the conical surface is used as a bearing surface, the connection technical performance is realized, and the self-locking performance, the self-positioning performance, the reusability, the fatigue resistance and other capabilities of the thread pair mainly depend on the conical surface and the taper size of the conical pair forming the asymmetric bidirectional tapered thread connection pair, namely the conical surface and the taper size of the internal thread and the external thread, and the thread pair is a non-thread type thread.

Compared with the existing threaded inclined plane principle, the single-direction force distributed on the inclined plane and the meshing relation between the internal thread and the external thread are different, the bidirectional conical threaded connection pair has the advantages that the section of a single cone body, distributed on any side of the left side or the right side, of the bidirectional cone body is in a bidirectional state through two plain lines of a cone body, the plain line is the intersection line of the cone surface and a plane passing through the cone axis, the cone principle of the asymmetric bidirectional conical threaded connection pair represents the axial force and the counter-axial force, the axial force and the counter-axial force are synthesized by the bidirectional force, the axial force and the corresponding counter-axial force are opposite, the internal thread and the external thread are in a holding relation, namely the screw thread pair is formed by holding the external thread through the internal thread, namely a cone body (external cone) corresponding to a cone body (internal cone) in a holding way until the cone body (external cone) is held and matched in a sizing way to realize self-positioning or until sizing interference contact to realize self-locking, the inner cone and the outer cone are radially locked or self-positioned by radially embracing the tapered hole and the cone frustum body together, so that the self-locking or self-positioning of the thread pair is realized, and the thread connection pair formed by the internal thread and the external thread of the non-traditional thread realizes the thread connection performance by mutually abutting the tooth bodies, which is a working relation state of the internal thread and the external thread in the thread technology.

When the internal cone and the external cone form a cone pair, the internal conical surface of the internal cone embraces the external conical surface of the external cone, and the internal conical surface is in close contact with the external conical surface. The internal cone axial force and the external cone reverse axial force are the unique force concepts of the bidirectional tapered thread technology, namely the conical pair technology.

The inner cone body is in a shape similar to a shaft sleeve, under the action of an external load, the inner cone body generates an axial force pointing to or pressing against a cone axis, the axial force is formed by a pair of centripetal forces which are distributed in a mirror-image manner by taking the cone axis as a center and are respectively vertical to two elementary lines of the cone body in a bidirectional synthesis manner, namely the axial force is formed by two centripetal forces which are distributed on two sides of the cone axis in a mirror-image manner by taking the cone axis as the center and are respectively vertical to two elementary lines of the cone body and point to or press against a common point of the cone axis through the cone axis cross section, when the cone body and the spiral structure are synthesized into a thread and are applied to a thread pair, the axial force is formed by two centripetal forces which are distributed in a mirror-image manner and/or approximate mirror-image manner on two sides of the thread axis and are respectively vertical to two elementary lines of the cone body and point to or press against the common point of the thread axis and/or approximate common point through the thread axis cross section, the axial force is densely and numb distributed on the conical axis and/or the thread axis in an axial and circumferential mode, the axial force is corresponding to an axial force angle, an included angle of two centripetal forces forming the axial force forms the axial force angle, and the size of the axial force angle depends on the taper size of the cone, namely the size of the taper angle.

The external cone body exists in a form similar to a shaft and has strong capacity of absorbing various external loads, the external cone body generates a counter axial force which is opposite to each axial force of the internal cone body, the counter axial force is bidirectionally synthesized by a pair of counter axial forces which are distributed in a mirror image way by taking the cone axis as the center and are respectively vertical to two prime lines of the cone body, namely the cross section of the counter axial force passing through the cone axis is composed of two counter axial forces which are distributed in a mirror image way by taking the cone axis as the center on two sides of the cone axis and are respectively vertical to the two prime lines of the cone body and point or press to the internal cone surface by the common point of the cone axis, and when the cone body and the spiral structure are synthesized into a thread and are applied to a thread pair, the cross section of the counter axial force passing through the thread axis is formed by a thread which is distributed in a mirror image way and/or approximately in a two way by taking the thread axis as the center and point and/or approximately common point of the thread axis points or point or point of the common point or the mirror image of the thread axis The anti-axial force angle is formed by the included angle of the two anti-axial forces forming the anti-axial force, and the magnitude of the anti-axial force angle depends on the taper magnitude of the cone, namely the magnitude of the taper angle. The axial force and the counter axial force are generated when the inner cone and the outer cone of the cone pair are in effective contact, namely, a pair of corresponding and opposite axial force and counter axial force always exist in the effective contact process of the inner cone and the outer cone of the cone pair, the axial force and the counter axial force are both bidirectional force and non-unidirectional force which are centered on the cone axis and/or the thread axis and distributed in a mirror image bidirectional way, the cone axis and the thread axis are coincident axes, namely the same axis and/or approximate same axis, the counter axial force and the axial force are in reverse collinearity, when the cones and the spiral structure are synthesized into threads and form the thread pair, the threads are in reverse collinearity and/or approximate reverse collinearity, the axial force and the counter axial force generate pressure on the contact surface of the inner cone surface and the outer cone surface until interference, and the axial force and the counter axial force are densely and the contact surface uniformly distributed on the surface of the inner cone surface and the outer cone surface in the circumferential direction, when the cohesion motion of the inner cone and the outer cone is carried out until the cone pair reaches the pressure generated by interference fit, the inner cone and the outer cone are combined together, namely the pressure can already enable the inner cone to cohere with the outer cone to form a similar integral structure, and after the external force facilitated by the pressure disappears, the inner cone and the outer cone cannot be separated from each other under the action of gravity due to the random change of the body position of the similar integral structure, the cone pair is self-locked, namely the thread pair is self-locked, the self-locking performance has a certain resistance effect on other external loads which can cause the inner cone and the outer cone to be separated from each other except for gravity, the cone pair also has the self-positioning performance of the mutual fit of the inner cone and the outer cone, but the cone by-product can be self-locked and self-positioned without any axial force angle and/or counter axial force angle.

When the axial force angle and/or the anti-axial force angle are less than 180 degrees and more than 127 degrees, the conical pair has self-locking performance, when the axial force angle and/or the anti-axial force angle are infinitely close to 180 degrees, the self-locking performance of the conical pair is best, the axial bearing capacity of the conical pair is weakest, the axial force angle and/or the anti-axial force angle are equal to and/or less than 127 degrees and more than 0 degrees, the conical pair is located in a region with weak self-locking performance and/or no self-locking performance, the axial force angle and/or the anti-axial force angle tend to change towards the direction infinitely close to 0 degrees, the self-locking performance of the conical pair is attenuated and tends to change towards the direction until the self-locking performance is completely lost, and the axial bearing capacity tends to change towards the direction in an enhanced manner until the axial bearing capacity is strongest.

When the axial and/or anti-axial central angle is less than 180 degrees and greater than 127 degrees, the conical pair is in a strong self-positioning state, strong self-positioning of the inner and outer cones is easily achieved, when the axial and/or anti-axial central angle is infinitely close to 180 degrees, the inner and outer cones of the conical pair have the strongest self-positioning capability, the axial and/or anti-axial central angle is equal to and/or less than 127 degrees and greater than 0 degrees, the conical pair is in a weak self-positioning state, the axial and/or anti-axial central angle tends to change towards the direction infinitely close to 0 degrees, and the inner and outer cones of the conical pair change from self-positioning capability towards attenuation direction until the inner and outer cones completely do not have self-positioning capability.

Compared with the containing and contained relation that the single-cone unidirectional conical thread of the applicant previously invented can only be loaded on one side of the conical surface, the containing and contained relation of the irreversible single-side bidirectional containing is formed, and the reversible left and right sides of the bidirectional conical thread of the double cone are bidirectionally contained, the left-side bearing of the conical surface and/or the right-side conical surface of the left-side conical surface respectively bear and/or the right-side conical surface of the left-side conical surface bear simultaneously in two directions, the disordered freedom degree between the conical hole and the conical frustum body is further limited, the asymmetric bidirectional conical thread connection pair obtains the necessary ordered freedom degree through the spiral motion, and the technical characteristics of the conical pair and the thread pair are effectively synthesized to form a brand new thread technology.

When the bidirectional conical threaded connection pair is used, the conical surface of the bidirectional conical frustum of the external thread of the bidirectional conical thread is matched with the conical surface of the bidirectional conical hole of the internal thread of the bidirectional conical thread.

This vice two-way tapered thread of two-way tapered threaded connection is not arbitrary tapering or arbitrary cone angle can all realize vice self-locking or self-align of threaded connection, and interior, outer cone be frustum of a cone and/or bell mouth must reach certain tapering promptly, and the vice self-locking nature and the self-align nature that just possesses of asymmetric two-way tapered threaded connection, the tapering include the left side tapering and the right side tapering of interior, outer thread body, the vice two-way tapered thread of this two-way tapered threaded connection of constitution has two kinds of forms, one kind is that the left side tapering of two-way tapered thread is greater than the right side tapering, and the right side tapering is less than the left side tapering, one kind is that the left side tapering of two-way tapered thread is less than the right side tapering, and the right side tapering is greater than the left side tapering promptly.

In the bidirectional tapered threaded connection pair, the left side taper corresponds to a left side taper angle, namely a first taper angle alpha 1, the right side taper corresponds to a right side taper angle, namely a second taper angle alpha 2, when the left side taper is greater than the right side taper, preferably, 0 degrees is greater than the first taper angle alpha 1 and less than 53 degrees, preferably, the first taper angle alpha 1 is 2-40 degrees, in individual special fields, preferably, 53 degrees is greater than or equal to the first taper angle alpha 1 and less than 180 degrees, preferably, the first taper angle alpha 1 is 53-90 degrees; preferably, 0 DEG < the second taper angle alpha 2 < 53 DEG, and preferably, the second taper angle alpha 2 is 2 DEG to 40 deg. When the left side taper is smaller than the right side taper, preferably, the angle of the first taper angle alpha 1 is more than 0 degrees and less than 53 degrees, and preferably, the value of the first taper angle alpha 1 is 2-40 degrees; preferably, the second taper angle alpha 2 is more than 0 degree and less than 53 degrees, preferably, the second taper angle alpha 1 is 2 degrees to 40 degrees, and in particular, the special field is preferably that the second taper angle alpha 2 is more than or equal to 53 degrees and less than 180 degrees, preferably, the second taper angle alpha 2 is 53 degrees to 90 degrees.

The special fields mentioned above refer to the application fields of screw connection such as transmission connection with low or even no self-locking requirement and/or weak self-positioning requirement and/or high axial bearing capacity requirement and/or necessary anti-lock measures.

The bidirectional tapered threaded connection pair is characterized in that the outer surface of the columnar parent body is provided with a conical frustum body which is distributed spirally and comprises an asymmetric bidirectional conical frustum body, the asymmetric bidirectional conical frustum body has two structural forms, one is a special bidirectional conical geometric body which is similar to an olive shape and has the left-side taper smaller than the right-side taper, the other is a special bidirectional conical geometric body which is similar to a dumbbell shape and has the left-side taper larger than the right-side taper, the columnar parent body can be solid or hollow and comprises workpieces and objects which need to be threaded on the outer surface of the columnar parent body, such as cylinders and/or non-cylinders, and the outer surface comprises the outer surface geometric shapes such as non-cylindrical surfaces, such as cylindrical surfaces and conical surfaces.

The bidirectional conical thread connection pair is characterized in that when the asymmetric bidirectional conical frustum body, namely the external thread, is a special bidirectional conical geometric body similar to an olive, the thread is formed by symmetrically and oppositely jointing the lower bottom surfaces of two conical frustum bodies with the same lower bottom surface and the same upper top surface but different cone heights, namely the thread is formed by mutually jointing the lower bottom surfaces of the two conical frustum bodies with the same lower bottom surface and the same upper top surface but different cone heights and forming the asymmetric bidirectional conical thread, the thread is respectively jointed with the upper top surfaces of the adjacent bidirectional conical frustum bodies, and/or the thread is formed by mutually jointing the upper top surfaces of the adjacent bidirectional conical frustum bodies to form the spiral thread, the external thread outer surface is provided with the asymmetric bidirectional conical frustum body conical surface, the external thread comprises a first spiral conical surface, namely the left side of the conical frustum body, and a second spiral conical surface, namely the right side of the conical surface and a spiral conical surface of the conical surface, and the external thread is formed by mutually jointing the upper top surfaces of the adjacent bidirectional conical frustum bodies with the adjacent bidirectional conical surface, and the external thread The thread line forms an asymmetric bidirectional tapered external thread, in a section passing through the axis of the thread, the complete unit body thread, namely a complete single-section asymmetric bidirectional tapered external thread, is a special olive-like bidirectional tapered geometric body with a large middle part and small two ends, the left side conical surface of the asymmetric bidirectional conical frustum, namely the included angle between two element lines of a first spiral conical surface of the conical frustum is a first cone angle, namely a left side conical angle corresponding to the left side conical degree of the asymmetric bidirectional tapered external thread, the left side conical degree is distributed in the left direction, the right side conical surface of the asymmetric bidirectional conical frustum, namely the included angle between two element lines of a second spiral conical surface of the conical frustum is a second cone angle, namely a right side conical angle corresponding to the right side conical degree of the asymmetric bidirectional tapered external thread, the right side conical degree is distributed in the right direction, and the corresponding conical directions of the first cone angle and the second cone angle are opposite, the element line is an intersection line of a conical surface and a plane passing through the axis of the cone, the shape formed by a first spiral conical surface of a conical frustum body and a second spiral conical surface of the conical frustum body of the bidirectional conical frustum body is the same as the shape of the right-angle side of a right-angle trapezoidal combination body which is superposed on the central axis of a columnar parent body, has the same lower bottom edge and the same upper bottom edge but different right-angle sides, is symmetrical with the lower bottom edges of two right-angle trapezoids and is oppositely jointed, the right-angle side of the right-angle trapezoidal combination body is the same as the shape of the spiral outer side surface of a revolution body which is formed by two inclined sides of the right-angle trapezoidal combination body, is circumferentially revolved at a uniform speed by taking the right-angle side of the revolution body as a revolution center, is simultaneously axially moved at a uniform speed along the central axis of the columnar parent body, the right, the first spiral conical surface of the conical frustum body forms a left-side conical degree, the left-side conical degree corresponds to a first conical degree alpha 1 of the asymmetric bidirectional conical external thread, namely a left-side conical angle corresponding to the left-side conical degree of the asymmetric bidirectional conical external thread, the left-side conical degree is distributed in a left direction, the second spiral conical surface of the conical frustum body forms a right-side conical degree, the right-side conical degree corresponds to a second conical angle alpha 2 of the asymmetric bidirectional conical external thread, namely a right-side conical angle corresponding to the right-side conical degree of the asymmetric bidirectional conical external thread, the right-side conical degree is distributed in a right direction, and the first conical degree alpha 1 and the second conical angle alpha 2 correspond to opposite conical directions. The bidirectional conical thread connection pair is characterized in that when the asymmetric bidirectional conical frustum body, namely the external thread, is a special dumbbell-like bidirectional conical geometric body, the thread is formed by symmetrically and oppositely jointing the upper top surfaces of two conical frustum bodies with the same lower bottom surface and the same upper top surface but different cone heights, namely the thread is formed by mutually jointing the upper top surfaces of the two conical frustum bodies with the same lower bottom surface and the same upper top surface but different cone heights and the lower bottom surfaces of the two conical frustum bodies are positioned at two ends of the bidirectional conical frustum body and form asymmetric bidirectional conical threads, the thread is respectively jointed with the lower bottom surfaces of the adjacent bidirectional conical frustum bodies, and/or the thread is formed by mutually jointing the upper top surfaces of the two conical frustum bodies with the lower external bottom surfaces of the adjacent bidirectional conical frustum bodies to form the spiral threads, the conical surface of the asymmetric bidirectional conical frustum body is arranged on the outer surface of the conical frustum body, the external thread comprises a first spiral conical surface of the conical surface, namely the left side, and a second spiral conical surface, namely the right conical surface and a conical surface of the external thread A spiral line forming an asymmetric bidirectional tapered external thread, in a section passing through the axis of the thread, the complete unit body thread, namely a complete single-section asymmetric bidirectional tapered external thread, is a special dumbbell-like bidirectional tapered geometric body with a small middle part and big two ends, the included angle between two element lines of a left side conical surface, namely a first spiral conical surface of a conical frustum, of the asymmetric bidirectional conical frustum is a first cone angle, namely a left side conical angle corresponding to the left side conical degree of the asymmetric bidirectional tapered external thread, the left side conical degree is distributed in the right direction, the included angle between two element lines of a right side conical surface, namely a second spiral conical surface of the conical frustum, of the asymmetric bidirectional conical frustum is a second cone angle, namely a right side conical angle corresponding to the right side conical degree of the asymmetric bidirectional tapered external thread, the right side conical degree is distributed in the left direction, and the first cone angle is opposite to the corresponding conical direction of the second cone angle, the element line is an intersection line of a conical surface and a plane passing through the axis of the cone, the shape formed by a first spiral conical surface of a conical frustum body and a second spiral conical surface of the conical frustum body of the bidirectional conical frustum body is the same as the shape of the right-angle side of a right-angle trapezoidal combination body which is superposed on the central axis of a columnar parent body, has the same lower bottom edge and the same upper bottom edge but different right-angle sides, is symmetrical with the upper bottom edges of two right-angle trapezoids and is oppositely jointed, the right-angle side of the right-angle trapezoidal combination body is the same as the shape of the spiral outer side surface of a revolution body which is formed by two inclined sides of the right-angle trapezoidal combination body, is circumferentially revolved at a uniform speed by taking the right-angle side of the revolution body as a revolution center, is simultaneously axially moved at a uniform speed along the central axis of the columnar parent body, the right-angle trapezoidal combination body is a special geometric body which has the same lower bottom edge and the same upper bottom edge but different right-angle sides, is symmetrically jointed oppositely, and the lower bottom edges are respectively positioned at two ends of the right-angle trapezoidal combination body, the first spiral conical surface of the conical frustum body forms a left-side conical degree, the left-side conical degree corresponds to a first conical degree alpha 1 of the asymmetric bidirectional conical external thread, namely a left-side conical angle corresponding to the left-side conical degree of the asymmetric bidirectional conical external thread, the left-side conical degree is distributed in a right direction, the second spiral conical surface of the conical frustum body forms a right-side conical degree, the right-side conical degree corresponds to a second conical angle alpha 2 of the asymmetric bidirectional conical external thread, namely a right-side conical angle corresponding to the right-side conical degree of the asymmetric bidirectional conical external thread, the right-side conical degree is distributed in a left direction, and the first conical degree alpha 1 and the second conical angle alpha 2 correspond to opposite conical directions.

The bidirectional tapered threaded connection pair is characterized in that tapered holes which are distributed spirally are formed in the inner surface of the cylindrical parent body and comprise asymmetric bidirectional tapered holes, the asymmetric bidirectional tapered holes have two structural forms, one is a special bidirectional tapered geometric body which is similar to an olive shape and has left-side taper smaller than right-side taper, the other is a special bidirectional tapered geometric body which is similar to a dumbbell shape and has left-side taper larger than right-side taper, the cylindrical parent body comprises a cylinder body and/or a non-cylinder body and the like, the inner surface of the cylindrical parent body needs to be processed with internal threads, the inner surface of the cylindrical parent body comprises cylindrical surfaces, conical surfaces and other non-cylindrical surfaces and other inner surface geometric shapes.

The bidirectional conical threaded connection pair is characterized in that when the asymmetric bidirectional conical hole, namely the internal thread, is a special bidirectional conical geometric body similar to an olive shape, the thread is formed by symmetrically and oppositely jointing the lower bottom surfaces of two conical holes with the same lower bottom surface and the same upper top surface but different cone heights, namely the thread is formed by mutually jointing the lower bottom surfaces of two conical holes with the same lower bottom surface and the same upper top surface but different cone heights and forming the asymmetric bidirectional conical thread, wherein the upper top surfaces are positioned at two ends of the bidirectional conical hole and respectively jointed with the upper top surfaces of the adjacent bidirectional conical holes and/or respectively jointed with the upper top surfaces of the adjacent bidirectional conical holes to form the spiral thread, the conical hole comprises an asymmetric bidirectional conical hole conical surface, the internal thread comprises a first spiral conical surface of the conical hole, namely a left conical surface, and a second spiral conical surface of the conical hole, namely a right conical surface and an internal spiral line, forming asymmetric bidirectional tapered internal threads, wherein in a section passing through the axis of the threads, the complete unit body threads, namely complete single-section asymmetric bidirectional tapered internal threads, are special bidirectional tapered geometric bodies with a large middle part and small two ends and similar olive shapes, an included angle formed by two prime lines of a left side conical surface, namely a first spiral conical surface of a tapered hole, of a bidirectional tapered hole is a first taper angle, namely a left side conical angle corresponding to the left side taper of the asymmetric bidirectional tapered internal threads, the left side taper is distributed leftwards, an included angle formed by two prime lines of a right side conical surface, namely a second spiral conical surface of the tapered hole, of the bidirectional tapered hole is a second taper angle, namely a right side conical angle corresponding to the right side taper of the asymmetric bidirectional tapered internal threads, the right side taper is distributed rightwards, the corresponding taper directions of the first taper angle and the second taper angle are opposite, the prime lines are intersecting lines of the conical surfaces and planes passing through the axes of the cones, the shape formed by the first spiral conical surface of the tapered hole and the second spiral conical surface of the tapered hole of the bidirectional tapered hole is the same as the shape of the spiral outer side surface of a revolving body which is formed by two inclined sides of a right-angle trapezoidal combination body, wherein the right-angle sides of the right-angle trapezoidal combination body are superposed on the central axis of the cylindrical parent body, have the same lower bottom edge and the same upper bottom edge but different right-angle sides, are symmetrical and are oppositely jointed, the right-angle trapezoidal combination body circumferentially rotates at a constant speed by taking the right-angle sides of the right-angle trapezoidal combination body as the revolving center, simultaneously moves axially at a constant speed along the central axis of the cylindrical parent body, and is a special geometrical body which is formed by two inclined sides of the right-angle trapezoidal combination body, has the same lower bottom edge and the same upper bottom edge but different right-angle sides, is symmetrical and oppositely jointed, the upper bottom edges of the two right-angle trapezoidal combination bodies are respectively positioned at two ends of the right-angle trapezoidal combination body, and the first spiral conical surface of the tapered hole forms a left side taper, the left side taper corresponds to a first taper angle alpha 1 of the asymmetric bidirectional tapered internal thread, namely a left side taper angle corresponding to the left side taper of the asymmetric bidirectional tapered internal thread, the left side taper is distributed in a left direction, the second spiral taper surface of the taper hole forms a right side taper, the right side taper corresponds to a second taper angle alpha 2 of the asymmetric bidirectional tapered internal thread, namely a right side taper angle corresponding to the right side taper of the asymmetric bidirectional tapered internal thread, the right side taper is distributed in a right direction, and the taper directions corresponding to the first taper angle alpha 1 and the second taper angle alpha 2 are opposite.

The bidirectional conical thread connecting pair is characterized in that when the asymmetric bidirectional conical hole, namely the internal thread, is a special bidirectional conical geometric body in a dumbbell-like shape, the thread is formed by symmetrically and oppositely jointing the upper top surfaces of two conical holes with the same lower bottom surface and the same upper top surface but different cone heights, namely the thread is formed by mutually jointing the upper top surfaces of the two conical holes with the same lower bottom surface and the same upper top surface but different cone heights and the lower bottom surfaces of the two conical holes are positioned at two ends of the bidirectional conical hole and forming the asymmetric bidirectional conical thread, the thread is respectively jointed with the lower bottom surfaces of the adjacent bidirectional conical holes and/or is formed by mutually jointing the upper top surfaces of the two conical holes with the lower bottom surfaces of the adjacent bidirectional conical holes to form the spiral thread, the conical hole comprises an asymmetric bidirectional conical hole conical surface, the internal thread comprises a first spiral conical surface of the conical hole, namely a left conical surface and a second spiral conical surface, namely a right conical surface and an internal spiral line, forming asymmetric bidirectional tapered internal threads, wherein in a section passing through the axis of the threads, the complete unit body threads, namely complete single-section asymmetric bidirectional tapered internal threads, are special dumbbell-like bidirectional tapered geometric bodies with small middle parts and large two ends, an included angle formed by two prime lines of a left side conical surface, namely a first spiral conical surface of a conical hole, of a bidirectional conical hole is a first taper angle, namely a left side conical angle corresponding to the left side taper of the asymmetric bidirectional tapered internal threads, the left side taper is distributed in the right direction, an included angle formed by two prime lines of a right side conical surface, namely a second spiral conical surface of the conical hole, of the bidirectional conical hole is a second taper angle, namely a right side conical angle corresponding to the right side taper of the asymmetric bidirectional tapered internal threads, the right side taper is distributed in the left direction, the corresponding taper directions of the first taper angle and the second taper angle are opposite, and the prime lines are the intersection lines of the conical surfaces and planes passing through the axis of the conical threads, the shape formed by the first spiral conical surface of the tapered hole and the second spiral conical surface of the tapered hole of the bidirectional tapered hole is the same as the shape of the spiral outer side surface of a revolving body which is formed by two inclined sides of a right-angle trapezoidal combination body, wherein the right-angle sides of the right-angle trapezoidal combination body are superposed on the central axis of the cylindrical parent body, have the same lower bottom edge and the same upper bottom edge but different right-angle sides, are symmetrical and are oppositely jointed, the right-angle trapezoidal combination body circumferentially rotates at a constant speed by taking the right-angle sides of the right-angle trapezoidal combination body as the revolving center, simultaneously moves axially at a constant speed along the central axis of the cylindrical parent body, and is a special geometrical body which is formed by two inclined sides of the right-angle trapezoidal combination body, has the same lower bottom edge and the same upper bottom edge but different right-angle sides, is symmetrical and oppositely jointed, the lower bottom edges of the two right-angle trapezoidal combination bodies are respectively positioned at two ends, and the first spiral conical surface of the tapered hole forms left side taper, the left side taper corresponds to a first taper angle alpha 1 of the asymmetric bidirectional tapered internal thread, namely a left side taper angle corresponding to the left side taper of the asymmetric bidirectional tapered internal thread, the left side taper is distributed in the right direction, the second spiral taper surface of the tapered hole forms a right side taper, the right side taper corresponds to a second taper angle alpha 2 of the asymmetric bidirectional tapered internal thread, namely a right side taper angle corresponding to the right side taper of the asymmetric bidirectional tapered internal thread, the right side taper is distributed in the left direction, and the taper directions corresponding to the first taper angle alpha 1 and the second taper angle alpha 2 are opposite.

When in specific application, the bidirectional conical threaded connection pair is used as a thread pair consisting of a left-side conicity smaller than a right-side conicity olive-shaped asymmetric bidirectional conical external thread and a left-side conicity larger than a right-side conicity dumbbell-shaped asymmetric bidirectional conical internal thread and/or a left-side conicity larger than a right-side conicity dumbbell-shaped asymmetric bidirectional conical external thread and a left-side conicity smaller than a right-side conicity olive-shaped asymmetric bidirectional conical internal thread, the mutually matched spiral conical surfaces serving as thread working bearing surfaces can generate combined change, the mutual bearing surfaces comprise a first spiral conical surface of a conical hole and a second spiral conical surface of a conical frustum body, and/or the mutual bearing surfaces of the second spiral conical surface of the conical hole and the first spiral conical surface of the conical frustum body and/or the right conical surface of the left-side conical surface are simultaneously loaded, but not limited to the above combination form of the mutually matched spiral conical surfaces, but the technical principle is the same regardless of the combination.

When the bidirectional tapered thread connection pair is in transmission connection, bidirectional bearing is realized through the screwing connection of the bidirectional tapered internal thread bidirectional tapered hole and the bidirectional tapered external thread bidirectional conical frustum body, when the external thread and the internal thread form a thread pair, a clearance must be formed between the internal thread and the external thread, namely, a clearance must be formed between the bidirectional tapered external thread bidirectional conical frustum body and the bidirectional tapered internal thread bidirectional tapered hole, if oil and other media are lubricated between the internal thread and the external thread, a bearing oil film is easily formed, the clearance is favorable for forming the bearing oil film, the asymmetric bidirectional tapered thread connection pair is applied to transmission connection and is equivalent to a sliding bearing pair consisting of one pair and/or a plurality of sliding bearings, namely, each bidirectional tapered internal thread bidirectional accommodation corresponds to one bidirectional tapered external thread, a sliding bearing is formed, and when the whole asymmetric bidirectional tapered thread connection pair is applied to transmission connection, the number of the formed sliding bearings is correspondingly adjusted according to the application working condition, namely the bidirectional conical internal thread and the bidirectional conical external thread are effectively and bidirectionally jointed, namely the number of the contained and contained thread joints of the effective bidirectional contact cohesion is designed according to the application working condition, the bidirectional conical external thread frustum is contained through the bidirectional conical internal thread conical hole, and the bidirectional conical external thread frustum is positioned in multiple directions such as radial direction, axial direction, angular direction, circumferential direction and the like, preferably, the bidirectional conical frustum is contained through the bidirectional conical hole, the radial direction and circumferential direction main positioning are assisted by the axial direction and angular direction auxiliary positioning, so that the multi-direction positioning of an inner cone and an outer cone is formed until the conical surface of the bidirectional conical hole is cohered with the conical surface of the bidirectional conical frustum to realize self-positioning or self-locking until the sizing interference contact is generated, a special synthesis technology of a conical pair and a thread pair is formed, and the precision of the transmission connection of the conical thread technology, especially the asymmetric bidirectional conical thread connection pair is ensured, Efficiency and reliability.

When the bidirectional conical threaded connection pair is fastened and connected and sealed, the technical performances of the connection performance, the locking performance, the anti-loosening performance, the bearing performance, the sealing performance and the like are realized through the screwing connection of the bidirectional conical hole and the bidirectional conical frustum, namely, the first spiral conical surface of the conical frustum and the first spiral conical surface of the conical hole are sized until interference and/or the second spiral conical surface of the conical frustum and the second spiral conical surface of the conical hole are sized until interference and/or the first spiral conical surface of the conical frustum and the second spiral conical surface of the conical hole are sized until interference and/or the second spiral conical surface of the conical frustum and the first spiral conical surface of the conical hole are sized until interference, according to the application working condition, one-direction bearing and/or two-direction simultaneous bearing are realized, namely, the inner conical surface and the outer conical surface are centered until the inner and outer diameters of the conical hole are centered under the guidance of a spiral line by the bidirectional conical frustum and the bidirectional conical hole until the first spiral conical surface of the conical hole is centered The cone surface and the first spiral cone surface of the cone frustum body are embraced to achieve one-direction bearing or bear sizing fit in two directions simultaneously or until the sizing interference contact is achieved and/or the second spiral cone surface of the conical hole and the second spiral cone surface of the cone frustum body are embraced to achieve one-direction bearing or bear sizing fit in two directions simultaneously or until the sizing interference contact is achieved and/or the second spiral cone surface of the conical hole and the first spiral cone surface of the cone frustum body are embraced to achieve one-direction bearing or bear sizing fit in two directions simultaneously or until the sizing interference contact is achieved and/or the first spiral cone surface of the conical hole and the second spiral cone surface of the cone frustum body are embraced to achieve one-direction bearing or bear sizing fit in two directions simultaneously or until the sizing interference contact is achieved, and the bidirectional outer cone is contained by the bidirectional cone, and the bidirectional positioning is realized in multiple directions such as radial direction, axial direction, angular direction, circumferential direction and the like, preferably, the bidirectional conical frustum is contained by the bidirectional conical hole, and the radial and circumferential main positioning is assisted by the axial and angular auxiliary positioning to further form the multi-directional positioning of the inner cone and the outer cone until the conical surface of the bidirectional conical hole is embraced with the conical surface of the bidirectional conical frustum to realize self-positioning or until the sizing interference contact generates self-locking, so that a special synthesis technology of the conical pair and the threaded pair is formed, and the technical performances of the mechanical fastening mechanism, such as connection performance, locking performance, anti-loosening performance, bearing performance, sealing performance and the like, are realized.

Therefore, the technical performances of the mechanical fastening mechanism of the asymmetric bidirectional tapered threaded connection pair, such as high transmission precision efficiency, low bearing capacity, self-locking force, anti-loosening capacity, good sealing performance and the like, are related to the first spiral conical surface of the cone frustum and the left side conical degree formed by the first spiral conical surface, namely the corresponding first cone angle alpha 1, the second spiral conical surface of the cone frustum and the right side conical degree formed by the second spiral conical surface of the cone frustum, namely the corresponding second cone angle alpha 2, the first spiral conical surface of the tapered hole and the left side conical degree formed by the first spiral conical surface, namely the corresponding first cone angle alpha 1, the second spiral conical surface of the tapered hole and the right side conical degree formed by the second spiral conical surface, namely the corresponding second cone angle alpha 2.

In other words, to achieve the self-locking and self-positioning capabilities of conical matching, any taper angle or any taper angle is not required, namely the technical performances of the asymmetric bidirectional tapered threaded connection pair, such as locking performance, anti-loosening performance, bearing performance, sealing performance and the like, mainly depends on the first spiral conical surface of the internal thread and the external thread of the asymmetric bidirectional tapered thread, the left taper formed by the first spiral conical surface, namely the first taper angle corresponding to the first spiral conical surface, the second spiral conical surface of the internal thread and the external thread, and the right taper formed by the second spiral conical surface, namely the second taper angle corresponding to the second spiral conical surface, and has certain influence on the material friction coefficient, the processing quality and the application condition of the columnar parent body and the cylindrical parent body.

In the asymmetric bidirectional tapered threaded connection pair, when the right-angle trapezoidal combination body rotates at a constant speed for one circle, the axial movement distance of the right-angle trapezoidal combination body is at least one time of the length of the sum of the right-angle sides of two right-angle trapezoids with the same lower bottom edge and the same upper bottom edge but different right-angle sides. The structure ensures that the first spiral conical surface of the truncated cone body, the second spiral conical surface of the truncated cone body, the first spiral conical surface of the tapered hole and the second spiral conical surface of the tapered hole have enough length, thereby ensuring that the bidirectional conical surface of the truncated cone body has enough effective contact area and strength and the efficiency required by spiral motion when being matched with the bidirectional conical surface of the tapered hole. In the asymmetric bidirectional tapered threaded connection pair, when the right-angle trapezoidal combination body rotates at a constant speed for one circle, the axial movement distance of the right-angle trapezoidal combination body is equal to the length of the sum of the right-angle sides of two right-angle trapezoids with the same lower bottom edge and the same upper bottom edge but different right-angle sides. The structure ensures that the first spiral conical surface of the truncated cone body, the second spiral conical surface of the truncated cone body, the first spiral conical surface of the tapered hole and the second spiral conical surface of the tapered hole have enough length, thereby ensuring that the bidirectional conical surface of the truncated cone body has enough effective contact area and strength and the efficiency required by spiral motion when being matched with the bidirectional conical surface of the tapered hole.

In the asymmetric bidirectional tapered threaded connection pair, the first spiral conical surface of the truncated cone body and the second spiral conical surface of the truncated cone body are both continuous helicoids or non-continuous helicoids; the first spiral conical surface of the tapered hole and the second spiral conical surface of the tapered hole are both continuous helical surfaces or non-continuous helical surfaces. Preferably, the truncated cone first helical conical surface and the truncated cone second helical conical surface and the tapered bore first helical conical surface and the tapered bore second helical conical surface are continuous helical surfaces.

In the above asymmetric bidirectional tapered threaded connection pair, when the cylindrical parent body connection hole is screwed into the screwing end of the cylindrical parent body, there is a screwing direction requirement, that is, the cylindrical parent body connection hole cannot be screwed in the opposite direction, and an included angle between two element lines of a first helical conical surface of the internal thread and/or the external thread, that is, an included angle between two element lines of a second helical conical surface of the internal thread and/or the external thread, that is, a corresponding taper direction of a second conical angle, is opposite and/or opposite.

In the asymmetric bidirectional tapered threaded connection pair, one end of the columnar parent body is provided with a head with a size larger than the outer diameter of the columnar parent body and/or one end and/or two ends of the columnar parent body are/is provided with heads with small diameters smaller than bidirectional tapered external threads of the threaded rod body of the columnar parent body, and the connecting hole is a threaded hole formed in the nut. The columnar parent body and the head are connected into a bolt, the bolt is not provided with the head and/or the heads at two ends are smaller than the small diameter of the bidirectional conical external thread and/or the bolt is provided with the bidirectional conical external thread at two ends without threads in the middle, and the connecting hole is arranged in the nut.

Compared with the prior art, the asymmetric bidirectional tapered threaded connection pair has the advantages that: reasonable in design, simple structure, the circular cone pair that forms through the coaxial internal and external diameter centering of interior, outer circular cone bears or the sizing realizes fastening and connection function until interference fit in two-way, convenient operation, and locking force is big, and the load value is big, and locking performance is good, and transmission efficiency and precision are high, and mechanical seal is effectual, and stability is good, appear the pine when preventing to connect and take off the phenomenon, have auto-lock and self-align function.

Drawings

Fig. 1 is a schematic view of a threaded connection pair formed by an olive-like (left side taper smaller than right side taper) asymmetric bidirectional tapered external thread and a dumbbell-like (left side taper larger than right side taper) asymmetric bidirectional tapered internal thread according to the first embodiment of the present invention.

Fig. 2 is a schematic structural diagram of an olive-like (left side taper smaller than right side taper) asymmetric bidirectional tapered thread external thread and a complete unit body thread thereof according to a first embodiment of the present invention.

Fig. 3 is a schematic structural diagram of an asymmetric bidirectional tapered thread internal thread in a dumbbell-like shape (left side taper is greater than right side taper) and a complete unit body thread thereof according to a first embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a threaded connection pair formed by the external asymmetric bidirectional tapered thread of the dumbbell-like shape (left side taper is greater than right side taper) and the internal asymmetric bidirectional tapered thread of the olive-like shape (left side taper is less than right side taper) according to the second embodiment of the present invention.

Fig. 5 is a schematic structural diagram of an asymmetric bidirectional tapered thread external thread and a complete unit body thread thereof in a dumbbell-like shape (left side taper is larger than right side taper) according to the second embodiment of the present invention.

Fig. 6 is a schematic structural diagram of an olive-like (left side taper smaller than right side taper) asymmetric bidirectional tapered thread internal thread and a complete unit body thread thereof according to the second embodiment of the present invention.

Fig. 7 is a diagram of "the prior art thread is a bevel on a cylindrical or conical surface" as referred to in the background of the invention.

FIG. 8 is a diagram of a "inclined plane slide block model based on the inclined plane principle, which is a principle of the prior art thread technique" related to the background of the present invention.

Fig. 9 is a view of "lead angle of prior art thread" related to the background of the invention. In the figure, a tapered thread 1, a cylindrical parent body 2, a nut body 21, a cylindrical parent body 3, a screw body 31, a tapered hole 4, a bidirectional tapered hole 41, a bidirectional tapered hole conical surface 42, a tapered hole first spiral conical surface 421, a first taper angle α 1, a tapered hole second spiral conical surface 422, a second taper angle α 2, an internal spiral 5, an internal thread 6, a truncated cone 7, a bidirectional truncated cone 71, a bidirectional truncated cone conical surface 72, a truncated cone first spiral conical surface 721, a first taper angle α 1, a truncated cone second spiral conical surface 722, a second taper angle α 2, an external spiral 8, an external thread 9, a similar olive 93, a similar dumbbell 94, a left taper 95, a right taper 96, a left distribution 97, a right distribution 98, a thread connection pair and/or thread pair 10, a play 101, a cone axis 01, a thread axis 02, a slider a on a tapered body, a tapered thread, a play, a tapered thread on a tapered body, a tapered hole 6, a bidirectional tapered hole tapered surface 42, a bidirectional tapered hole 72, a hole tapered hole 72, bidirectional tapered hole 72, a hole tapered hole, The thread cutting device comprises a ramp body B, gravity G, a gravity along ramp component G1, friction force F, a thread lead angle phi, an equivalent friction angle P, a traditional external thread large diameter d, a traditional external thread small diameter d1 and a traditional external thread medium diameter d 2.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Example one

As shown in fig. 1, 2 and 3, the asymmetric bidirectional tapered thread connection pair 10 includes a bidirectional frustum 71 spirally distributed on the outer surface of the cylindrical parent body 3 and a bidirectional tapered hole 41 spirally distributed on the inner surface of the cylindrical parent body 2, that is, includes an external thread 9 and an internal thread 6 which are in thread fit with each other, the asymmetric bidirectional tapered thread 1 includes an internal thread 6 similar to a dumbbell 94, an internal thread 6 similar to an olive 93, an external thread 9 similar to a dumbbell 94 and an external thread 9 similar to an olive 93, the complete unit body thread is an olive 93 which has a large spiral middle and two small ends and a left side taper 95 smaller than a right side taper 96 or a bidirectional tapered body 94 which has a large spiral middle and two small ends and a left side taper 95 larger than a right side taper 96, and includes the bidirectional tapered hole 41 and the bidirectional frustum 71, and the internal thread 6 is a bidirectional tapered cone 94 whose inner surface of the cylindrical parent body 2 is spirally similar to an olive 93 or a dumbbell 94 The external thread 9 is a spiral olive-like 93 or dumbbell-like 94 bidirectional cone table 71 on the outer surface of the columnar parent body 3, namely, the internal thread 6 is distributed with a spiral bidirectional cone hole 41 and the external thread 9 is distributed with a spiral bidirectional cone table 71, the internal thread 6 exists in a spiral bidirectional cone hole 41 (non-solid space), the external thread 9 exists in a spiral bidirectional cone table 71 (material solid), the internal thread 6 and the external thread 9 are in the relation of a containing piece and a contained piece, and the working state of the thread is as follows: the internal thread 6 and the external thread 9 are a section of bidirectional conical geometric body which is screwed and sleeved together until the interference fit is achieved, namely, the bidirectional conical hole 41 contains the bidirectional conical frustum 71 section by section, namely, the internal thread 6 contains the external thread 9 section by section, the two-way containing limits the disordered freedom degree between the conical hole 4 and the conical frustum 7, the screw motion enables the asymmetric bidirectional conical thread connection pair 10 to obtain the necessary ordered freedom degree, and the technical characteristics of the conical pair and the thread pair are effectively synthesized.

The asymmetric bidirectional tapered threaded connection 10 of this embodiment is configured such that the bidirectional truncated cone conical surface 72 mates with the bidirectional tapered bore conical surface 42 in use.

In the embodiment, the conical frustum 7 and/or the conical hole 4 of the bidirectional conical thread 1 of the asymmetric bidirectional conical thread connection pair 10 reach a certain taper, namely the cone forming the conical pair reaches a certain taper angle, the asymmetric bidirectional conical thread connection pair 10 has self-locking and self-positioning properties, the taper comprises a left taper 95 and a right taper 96, namely the taper angle comprises a left taper angle and a right taper angle, the left taper 95 of the bidirectional conical body forms a first taper angle alpha 1 corresponding to the left taper 95, the right taper 96 of the bidirectional conical body forms a second taper angle alpha 2 corresponding to the right taper 96, the internal thread 6 and the external thread 9 are contained in the conical body through the conical hole until the internal and external conical surfaces bear each other, the technical performance mainly depends on the conical surfaces of the mutually matched threaded bodies and the taper sizes, when the left taper 95 is greater than the right taper 96, wherein, the first taper angle alpha 1 is greater than 0 degree and less than 53 degrees, the second taper angle alpha 2 is more than 0 degree and less than 53 degrees, or the first taper angle alpha 1 is more than or equal to 53 degrees and less than 180 degrees; when the left side taper 95 is smaller than the right side taper 96, wherein the first taper angle alpha 1 is more than 0 degree and less than 53 degrees, the second taper angle alpha 2 is more than 0 degree and less than 53 degrees, or the second taper angle alpha 2 is more than 53 degrees and less than 180 degrees.

The asymmetric bidirectional tapered external thread 9 in this embodiment is olive-like 93 with a left side taper 95 less than a right side taper 96, and the asymmetric bidirectional tapered internal thread 6 is dumbbell-like 94 with a left side taper 95 greater than a right side taper 96. The left taper 95 corresponds to a left taper angle, i.e., a first taper angle α 1, and the right taper 96 corresponds to a right taper angle, i.e., a second taper angle α 2.

When the left side taper 95 is greater than the right side taper 96, preferably, the angle of 0 ° < the first taper angle α 1 < 53 °, preferably, the value of the first taper angle α 1 is 2 ° to 40 °, in particular, preferably, the angle of 53 ° < the first taper angle α 1 < 180 °, preferably, the value of the first taper angle α 1 is 53 ° to 90 °; preferably, 0 DEG < the second taper angle alpha 2 < 53 DEG, and preferably, the second taper angle alpha 2 is 2 DEG to 40 deg.

When the left side taper 95 is smaller than the right side taper 96, preferably, 0 degrees < the first taper angle alpha 1 < 53 degrees, preferably, the value of the first taper angle alpha 1 is 2-40 degrees; preferably, the second taper angle alpha 2 is more than 0 degree and less than 53 degrees, preferably, the value of the second taper angle alpha 2 is 2 degrees to 40 degrees, in particular, the special field is preferably that the second taper angle alpha 2 is more than or equal to 53 degrees and less than 180 degrees, preferably, the value of the second taper angle alpha 2 is 53 degrees to 90 degrees.

The special fields mentioned above refer to the application fields of screw connection such as transmission connection with low or even no self-locking requirement and/or weak self-positioning requirement and/or high axial bearing capacity requirement and/or necessary anti-lock measures.

The external thread 9 is arranged on the outer surface of the columnar parent body 3, and is characterized in that the columnar parent body 3 is provided with a screw body 31, the outer surface of the screw body 31 is provided with a circular truncated cone body 7 which is distributed spirally, the circular truncated cone body 7 comprises an asymmetric bidirectional circular truncated cone body 71, the asymmetric bidirectional circular truncated cone body 71 is a special bidirectional conical geometric body which is similar to an olive shape 93 and has a left side taper 95 smaller than a right side taper 96, and the columnar parent body 3 can be solid or hollow and comprises a cylinder, a cone, a pipe body and the like.

The asymmetric bidirectional frustum 71 in the olive-like shape 93 is characterized in that the asymmetric bidirectional frustum 71 is formed by symmetrically and oppositely combining the lower bottom surfaces of two frustum bodies with the same lower bottom surface and the same upper top surface but different cone heights, namely the lower bottom surfaces of the two frustum bodies with the same lower bottom surface and the same upper top surface but different cone heights are mutually combined, the upper top surfaces are positioned at two ends of the bidirectional frustum 71 and form asymmetric bidirectional tapered threads 1, the asymmetric bidirectional tapered threads are respectively combined with the upper top surfaces of the adjacent bidirectional frustum bodies 71, and/or are respectively combined with the upper top surfaces of the adjacent bidirectional frustum bodies 71, the outer surface of the frustum body 7 comprises an asymmetric bidirectional frustum conical surface 72, the external threads 9 comprise a frustum conical surface first spiral conical surface 721, namely the left side, and a frustum conical surface second spiral conical surface 722, namely the right side, and an external thread 8, forming an asymmetric bidirectional tapered external thread 9, wherein in a cross section passing through a thread axis, the complete single-section asymmetric bidirectional tapered external thread 9 is a special bidirectional tapered geometric body which is shaped like an olive 93 and has a large middle part and small two ends, an included angle between two element lines of a left side conical surface, namely a first spiral conical surface 721 of the conical frustum, of the asymmetric bidirectional conical frustum 71 is a first taper angle alpha 1, namely a left side conical angle corresponding to the left side taper 95 of the asymmetric bidirectional tapered external thread 9, the left side taper 95 is distributed in a left direction 97, an included angle between two element lines of a right side conical surface, namely a second spiral conical surface 722 of the conical frustum, of the asymmetric bidirectional conical frustum 71 is a second taper angle alpha 2, namely a right side conical angle corresponding to the right side taper 96 of the asymmetric bidirectional tapered external thread 9, the right side taper 96 is distributed in a right direction 98, and the corresponding taper directions of the first taper angle alpha 1 and the second taper angle alpha 2 are opposite, the element line is an intersection line of a conical surface and a plane passing through the axis of the cone, the shape formed by a first spiral conical surface 721 and a second spiral conical surface 722 of the conical frustum of the bidirectional conical frustum 71 is the same as the shape of the spiral outer side surface of a revolution body formed by two inclined sides of a right-angled trapezoid combination body which is superposed on the central axis of the columnar matrix 3, has the same lower bottom edge and the same upper bottom edge but different right-angled edges, is symmetrical and is joined oppositely, the right-angled edges of the right-angled trapezoid combination body are circumferentially and uniformly revolved around the revolution center, and the right-angled trapezoid combination body simultaneously axially moves along the central axis of the columnar matrix 3 at a uniform speed and is formed by two inclined sides of the right-angled trapezoid combination body, the right-angled trapezoid combination body is a special geometric body which has the same lower bottom edge and the same upper bottom edge but different right-angled edges, the lower bottom edges of the two right-angled trapezoids are symmetrical and are joined oppositely, and the upper bottom edges are respectively positioned at two ends of the right-angled combination body, the first spiral conical surface 721 of the conical frustum forms a left-side taper 95, the left-side taper 95 corresponds to a first taper angle alpha 1 of the asymmetric bidirectional tapered external thread 9, namely, a left-side conical angle corresponding to the left-side taper 95 of the asymmetric bidirectional tapered external thread 9, the left-side taper 95 is distributed in a left direction 97, the second spiral conical surface 722 of the conical frustum forms a right-side taper 96, the right-side taper 96 corresponds to a second taper angle alpha 2 of the asymmetric bidirectional tapered external thread 9, namely, a right-side conical angle corresponding to the right-side taper 96 of the asymmetric bidirectional tapered external thread 9, the right-side taper 96 is distributed in a right direction 98, and the corresponding taper directions of the first taper angle alpha 1 and the second taper angle alpha 2 are opposite.

That is, the above-mentioned olive-like 93 external thread 9 is formed by joining the lower bottom surfaces of two truncated cone bodies 7 having the same lower bottom surface and the same upper top surface but different taper heights symmetrically and oppositely, and the upper top surfaces are located at both ends of the bidirectional truncated cone body 71, and when the olive-like 93 asymmetric bidirectional tapered thread 1 is formed, the external thread 9 is formed by joining the upper top surfaces of the adjacent bidirectional truncated cone bodies 71 with each other, and/or joining the upper top surfaces of the adjacent bidirectional truncated cone bodies 71 with each other spirally.

The above-mentioned olive-like 93 external screw thread 9 includes a left side conical surface, i.e., a first spiral conical surface 721 of the truncated cone, and a right side conical surface, i.e., a second spiral conical surface 722 of the truncated cone, and an external screw thread 8 of the bidirectional conical surface 72, the shape formed by the first spiral conical surface 721 of the truncated cone and the second spiral conical surface 722 of the truncated cone, i.e., the bidirectional spiral conical surfaces, and the right-angle sides of the right-angle trapezoidal combination body, which are symmetrical and joined in opposite directions with the lower bases of two right-angle trapezoids having the same lower base and the same upper base but different right-angle sides and coinciding with the central axis of the columnar matrix 3, are the same as the rotational center, and rotate at a uniform circumferential speed and move at a uniform speed axially along the central axis of the columnar matrix 3 at the same time, and the shape of the spiral outer side of the revolution body formed by the two oblique sides of the right-angle trapezoidal combination body is the same as the shape.

The internal thread 6 is arranged on the inner surface of the cylindrical parent body 2, and is characterized in that the cylindrical parent body 2 is provided with a nut body 21, the inner surface of the nut body 21 is provided with tapered holes 4 which are distributed spirally, the tapered holes 4 comprise asymmetric bidirectional tapered holes 41, the asymmetric bidirectional tapered holes 41 are special bidirectional tapered geometric bodies which are shaped like a dumbbell 94 and have left-side taper 95 larger than right-side taper 96, and the cylindrical parent body 2 comprises a cylindrical body and/or a non-cylindrical body and other workpieces and objects which need to be processed with internal threads on the inner surface.

The asymmetric bidirectional tapered hole 41 in the dumbbell-like shape 94 is characterized in that the asymmetric bidirectional tapered hole 41 is formed by symmetrically and oppositely jointing the upper top surfaces of two tapered holes with the same lower bottom surface and the same upper top surface but different taper heights, namely, the upper top surfaces of the two tapered holes with the same lower bottom surface and the same upper top surface but different taper heights are mutually jointed, the lower bottom surfaces of the two tapered holes are positioned at two ends of the bidirectional tapered hole 41, and the asymmetric bidirectional tapered thread 1 is formed by mutually jointing the upper top surfaces of the two tapered holes with the same lower bottom surface and the same upper top surface respectively, and/or the two tapered holes 4 comprise asymmetric bidirectional tapered hole conical surfaces 42, the internal thread 6 comprises a tapered hole first spiral conical surface 421, namely a left side conical surface, and a tapered hole second spiral conical surface 422, namely a right side conical surface and an internal spiral line 5, and the asymmetric bidirectional tapered internal thread 6 is formed, in the section passing through the thread axis, the complete single-section asymmetric bidirectional conical internal thread 6 is a special bidirectional conical geometric body which is in a dumbbell-like shape 94 and has a small middle part and large two ends, the left side conical surface of the bidirectional conical hole 41, namely two prime lines of the first conical surface 421 of the conical hole, form an included angle which is a first conical angle alpha 1, namely a left side conical angle corresponding to the left side conical degree 95 of the asymmetric bidirectional conical thread 6, the left side conical degree 95 is distributed in the right direction 98, the right side conical surface of the bidirectional conical hole 41, namely two prime lines of the second conical surface 422 of the conical hole, form an included angle which is a second conical angle alpha 2, namely a right side conical angle corresponding to the right side conical degree 96 of the asymmetric bidirectional conical thread 6, the right side conical degree 96 is distributed in the left direction 97, the corresponding conical directions of the first conical angle alpha 1 and the second conical angle alpha 2 are opposite, the prime lines are the intersection lines of the conical surfaces and the plane passing through the conical axis, the shape formed by the first spiral conical surface 421 of the tapered hole and the second spiral conical surface 422 of the tapered hole of the bidirectional tapered hole 41 is the same as the shape of the spiral outer side surface of the revolution body formed by two inclined sides of the right-angle trapezoid combination body which is superposed on the central axis of the cylindrical parent body 2 and has the same lower bottom edge and the same upper bottom edge but different right-angle sides and is symmetrical with the upper bottom edge of the right-angle trapezoid combination body and jointed oppositely, the right-angle sides of the revolution body are the same as the shape of the spiral outer side surface of the revolution body which is circumferentially revolved at a constant speed and is simultaneously axially moved along the central axis of the cylindrical parent body 2 at a constant speed and is formed by the two inclined sides of the right-angle trapezoid combination body, the right-angle trapezoid combination body is a special geometric body which has the same lower bottom edge and the same upper bottom edge but different right-angle sides and is symmetrical with the upper bottom edges and jointed oppositely, and the first spiral conical surface 421 of the tapered hole forms a left side taper 95, the left taper 95 corresponds to a first taper angle α 1 of the asymmetric bidirectional tapered internal thread 6, namely, a left taper angle corresponding to the left taper 95 of the asymmetric bidirectional tapered internal thread 6, the left taper 95 is distributed in a right direction 98, the second spiral taper 422 of the tapered hole forms a right taper 96, the right taper 96 corresponds to a second taper angle α 2 of the asymmetric bidirectional tapered internal thread 6, namely, a right taper angle corresponding to the right taper 96 of the asymmetric bidirectional tapered internal thread 6, the right taper 96 is distributed in a left direction 97, and the corresponding taper directions of the first taper angle α 1 and the second taper angle α 2 are opposite.

That is, the above-mentioned internal thread 6 of dumbbell 94 is formed by joining the upper top surfaces of two tapered holes 4 having the same lower bottom surface and the same upper top surface but different taper heights symmetrically and oppositely, and the lower bottom surfaces are located at both ends of the bidirectional tapered hole 41, and when the asymmetric bidirectional tapered thread 1 of dumbbell 94 is formed, the internal thread 6 is formed by joining the lower bottom surfaces of the adjacent bidirectional tapered holes 41, respectively, and/or joining the lower bottom surfaces of the adjacent bidirectional tapered holes 41, respectively, spirally.

The internal thread 6 of the dumbbell-like 94 includes a left side conical surface, i.e., a first conical hole spiral conical surface 421, a right side conical surface, i.e., a second conical hole spiral conical surface 422, and an internal spiral line 5 of the bidirectional conical hole conical surface 42, the shapes formed by the first conical hole conical surface 421 and the second conical hole conical surface 422, i.e., the bidirectional conical surfaces, and the upper bases of two right trapezoids which are superposed on the central axis of the cylindrical parent body 2 and have the same lower base and the same upper base but different right-angled sides are symmetrical and oppositely jointed, the edges of the right trapezoid combination are taken as the rotation center, the right trapezoid combination rotates in the circumferential direction at a constant speed and moves axially along the central axis of the cylindrical parent body 2 at a constant speed, and the spiral outer side surfaces of the rotary body formed by the two oblique edges of the right trapezoid combination have the same shape.

The cylindrical parent body 3 is solid or hollow, and comprises a cylindrical body and/or a non-cylindrical body, wherein the workpiece or the object is required to be provided with the bidirectional tapered external thread 9 on the outer surface, the cylindrical parent body 2 comprises a cylindrical body and/or a non-cylindrical body, wherein the workpiece or the object is required to be provided with the bidirectional tapered internal thread 6 on the inner surface, and the outer surface or the inner surface comprises a cylindrical surface and/or a non-cylindrical surface geometry comprising a conical surface.

The above-mentioned internal 6 and/or external 9 threads comprise a single-part thread body with incomplete conical geometry, i.e. a single-part thread body with incomplete unit body threads.

In the embodiment, when the asymmetric bidirectional tapered threaded connection pair 10 is in transmission connection, the bidirectional tapered hole 41 is in screwing connection with the bidirectional frustum 71, bidirectional bearing is performed, when the external thread 9 and the internal thread 6 form the thread pair 10, and the internal thread 6 and the external thread 9 need to have a clearance 101, namely the bidirectional frustum 71 and the bidirectional tapered hole 41 need to have the clearance 101, if oil and other media are lubricated between the internal thread 6 and the external thread 9, a bearing oil film is easy to form, the clearance 101 is favorable for forming the bearing oil film, the asymmetric bidirectional tapered threaded connection pair 10 is equivalent to a group of sliding bearing pairs consisting of one pair of sliding bearings or a plurality of sliding bearings, namely each section of bidirectional tapered internal thread 6 bidirectionally contains one corresponding section of bidirectional tapered external thread 9 to form one pair of sliding bearings, and the whole bidirectional tapered threaded connection pair 10 is applied to transmission connection and consists of one pair of sliding bearings and/or a plurality of sliding bearings, the number of the formed sliding bearings is correspondingly adjusted according to the application working condition, namely the number of contained and contained thread joints of the effective joint of the bidirectional conical internal thread 6 and the bidirectional conical external thread 9 is designed according to the application working condition, the bidirectional internal cone 6 contains the bidirectional external cone 9 and is positioned in multiple directions such as radial direction, axial direction, angular direction, circumferential direction and the like, a special synthesis technology of a cone pair and a thread pair is formed, and the precision, the efficiency and the reliability of the transmission connection of a conical thread technology, particularly a bidirectional conical thread connection pair 10 are ensured.

The threaded connection pair 10 is formed by mutually sizing and matching a spiral bidirectional conical hole 41 and a spiral bidirectional cone table body 71 under the guidance of a spiral line, a clearance 101 is arranged between the bidirectional cone table body 71 and the bidirectional conical hole 41, the conical hole 4 of the internal thread 6 bidirectionally contains the conical table body 7 of the external thread 9, and each section of the internal thread 6 and the external thread 9 comprises one-side bidirectional bearing and/or left-right bidirectional bearing.

When the asymmetric bidirectional tapered threaded connection pair 10 in the embodiment is tightly and hermetically connected, the technical performances of the connection performance, the locking performance, the anti-loosening performance, the bearing performance, the sealing performance and the like are realized through the screwing connection of the bidirectional conical hole 41 and the bidirectional conical frustum body 71, according to the application condition, one-direction bearing and/or two-direction simultaneous bearing are achieved, namely, the inner and outer diameters of the bidirectional cone frustum 71 and the bidirectional tapered hole 41 are centered under the guidance of the spiral line until the first spiral conical surface 421 of the tapered hole and the second spiral conical surface 722 of the cone frustum are clasped until interference contact and/or the second spiral conical surface 422 of the tapered hole and the first spiral conical surface 721 of the cone frustum are clasped until interference contact, therefore, the technical performances of the mechanical fastening mechanism such as connection performance, locking performance, anti-loosening performance, bearing performance, sealing performance and the like are realized.

The threaded connection pair 10 is characterized in that the internal thread 6 and the external thread 9 form a threaded connection pair 10, and the threaded connection pair is borne by a contact surface serving as a bearing surface by a first conical spiral surface 421 and a second conical spiral surface 422 of the tapered hole and a first conical spiral surface 721 and a second conical spiral surface 722 of the truncated cone which are matched with each other, or the internal diameter and the external diameter of the internal cone and the external cone are centered under the guide of a spiral line until the conical surface 42 of the bidirectional tapered hole and the conical surface 72 of the bidirectional truncated cone are in self-positioning contact or generate self-locking.

Therefore, the technical performances of the mechanical fastening mechanism of the asymmetric bidirectional tapered threaded connection pair 10 in this embodiment, such as transmission accuracy, high and low transmission efficiency, large and small bearing capacity, large and small self-locking force, large and small anti-loosening capacity, good and bad sealing performance, reusability, are related to the first taper angle α 1 corresponding to the first helical conical surface 721 of the frustum cone and the left taper 95 formed by the first helical conical surface 722 of the frustum cone, the second taper angle α 2 corresponding to the second helical conical surface 96 formed by the second conical surface 722 of the frustum cone and the right taper 95 formed by the first helical conical surface 421 of the conical hole, the first taper angle α 1 corresponding to the first conical surface and the second helical conical surface 422 of the conical hole, and the second taper 96 formed by the second conical surface 422 of the conical hole and the right taper 96 corresponding to the second conical angle α 2.

In other words, to achieve the self-locking and self-positioning capabilities of conical matching, any taper angle or taper angle is not required, that is, the connection technical performances such as the locking performance, the anti-loosening performance, the bearing performance, the transmission performance and the sealing performance of the asymmetric bidirectional tapered threaded connection pair 10 are mainly determined by the first spiral conical surface of the internal thread 6 and the external thread 9 of the asymmetric bidirectional tapered thread 1, the left taper 95 formed by the first spiral conical surface, that is, the first taper angle α 1 corresponding to the first spiral conical surface, the second spiral conical surface of the external thread 9 of the internal thread 6, and the right taper 96 formed by the second spiral conical surface, that is, the second taper angle α 2 corresponding to the second spiral conical surface, and the material friction coefficients, the processing quality and the application conditions of the cylindrical parent body 3 and the cylindrical parent body 2 are also influenced to a certain extent.

In the asymmetric bidirectional tapered threaded connection pair 10, when the right-angled trapezoid combination rotates at a constant speed for one circle, the axial movement distance of the right-angled trapezoid combination is at least one time of the length of the sum of the right-angled sides of two right-angled trapezoids with the same lower base and the same upper base but different right-angled sides. Namely, when the right-angle trapezoidal combination body rotates at a constant speed for one circle, the axial moving distance of the right-angle trapezoidal combination body is at least one time of the sum length of the right-angle sides of the two right-angle trapezoids of the right-angle trapezoidal combination body. This configuration ensures that the frustum-conical body first helical conical surface 721 and the frustum-conical body second helical conical surface 722, and the tapered bore first helical conical surface 421 and the tapered bore second helical conical surface 422 have sufficient lengths, thereby ensuring that the bidirectional frustum-conical surface 72 has sufficient effective contact area and strength when mated with the bidirectional tapered bore conical surface 42, and efficiency required for helical motion.

In the asymmetric bidirectional tapered threaded connection pair 10, when the right-angled trapezoid combination rotates at a constant speed for one circle, the axial movement distance of the right-angled trapezoid combination is equal to the length of the sum of the right-angled sides of two right-angled trapezoids with the same lower base and the same upper base but different right-angled sides. Namely, when the right-angle trapezoidal combination body rotates at a constant speed for one circle, the axial moving distance of the right-angle trapezoidal combination body is equal to the sum length of the right-angle sides of the two right-angle trapezoidal combinations of the right-angle trapezoidal combination body. This structure ensures that the frustum-conical body first helical conical surface 721 and the frustum-conical body second helical conical surface 722, and the tapered bore first helical conical surface 421 and the tapered bore second helical conical surface 422 have sufficient lengths, thereby ensuring that the bidirectional frustum-conical body conical surface 72 has sufficient effective contact area and strength when mated with the bidirectional tapered bore conical surface 42, and efficiency required for helical motion. In the above asymmetric bidirectional tapered thread connection pair 10, the frustum-conical first helical conical surface 721 and the frustum-conical second helical conical surface 722 are both continuous helical surfaces or non-continuous helical surfaces; the first conical hole surface 421 and the second conical hole surface 422 are both continuous helical surfaces or non-continuous helical surfaces. Preferably, the truncated cone first helical conical surface 721 and the truncated cone second helical conical surface 722, and the tapered bore first helical conical surface 421 and the tapered bore second helical conical surface 422 are continuous helical surfaces.

The bidirectional conical body is characterized in that the left side conical surface and the right side conical surface of the bidirectional conical body, namely the first conical hole spiral conical surface 421, the second conical hole spiral conical surface 422 and the inner spiral line 5 are continuous helical surfaces or discontinuous helical surfaces, and the first conical frustum conical surface 721, the second conical frustum conical surface 722 and the outer spiral line 8 are continuous helical surfaces or discontinuous helical surfaces.

In the asymmetric bidirectional tapered threaded connection pair 10, when the connecting hole of the cylindrical parent body 2 is screwed into the screwing end of the cylindrical parent body 3, the screwing direction is required, that is, the connecting hole of the cylindrical parent body 2 can not be screwed in the opposite direction, the contact surface of the first spiral conical surface 721 of the truncated cone and the second spiral conical surface 422 of the tapered hole is a supporting surface and/or an interference fit and/or the contact surface of the second spiral conical surface 722 of the truncated cone and the first spiral conical surface 421 of the tapered hole is a supporting surface and/or an interference fit and/or the first spiral conical surface 421 of the tapered hole and the second spiral conical surface 422 of the tapered hole are contained and contacted with the first spiral conical surface 721 of the truncated cone and the second spiral conical surface 722 of the tapered hole, the connecting function of the asymmetric bidirectional tapered threaded connecting pair 10 is realized through the contained cohesive contact and/or interference fit of the internal thread 6 and the conical surface of the external thread 9.

In the above asymmetric bidirectional tapered threaded connection pair 10, a head portion with a size larger than the outer diameter of the cylindrical parent body 3 is provided at one end of the cylindrical parent body 3 and/or a head portion with a small diameter smaller than the tapered threaded external thread 9 of the screw body 31 of the cylindrical parent body 3 is provided at one end or both ends of the cylindrical parent body 3, and the connection hole is a threaded hole provided on the nut body 21. That is, the connection between the columnar parent body 3 and the head is a bolt, the connection without the head and/or the head at both ends is smaller than the small diameter of the bidirectional tapered external thread 9 and/or the connection without the thread at both ends is a stud, and the connection hole is arranged in the nut body 21.

Compared with the prior art, the conical threaded connection pair 10 has the advantages that: reasonable in design, simple structure, the vice sizing of circular cone through interior outer circular cone formation realizes fastening and connection function until interference fit, convenient operation, and the locking force is big, and the load value is big, and locking performance is good, and transmission efficiency and precision are high, and mechanical seal is effectual, and stability is good, can prevent to appear the pine phenomenon of taking off when connecting, has auto-lock and from the positioning function.

Example two

As shown in fig. 4, 5, and 6, the structure, principle, and implementation steps of the present embodiment are similar to those of the present embodiment, except that in the present embodiment, the external thread 9 constituting the thread pair 10 is a dumbbell 94-like asymmetric bidirectional tapered thread 1, i.e., a dumbbell 94-like asymmetric bidirectional frustum 71, and the left side taper 95 is greater than the right side taper 96, the internal thread 6 is a olive 93-like asymmetric bidirectional tapered thread 1, i.e., an olive 93-like asymmetric bidirectional tapered hole 41, and the left side taper 95 is less than the right side taper 96.

The asymmetric bidirectional cone frustum 71 in the dumbbell-like 94 shape is characterized in that the asymmetric bidirectional cone frustum 71 is formed by symmetrically and oppositely jointing the upper top surfaces of two cone frustum bodies with the same lower bottom surface and the same upper top surface but different cone heights, namely the upper top surfaces of the two cone frustum bodies with the same lower bottom surface and the same upper top surface but different cone heights are mutually jointed, the lower bottom surfaces are positioned at two ends of the bidirectional cone frustum 71 and form asymmetric bidirectional tapered threads 1, the asymmetric bidirectional cone frustum bodies are respectively jointed with the lower bottom surfaces of the adjacent bidirectional cone frustum bodies 71, and/or the asymmetric bidirectional cone frustum bodies are respectively jointed with the lower bottom surfaces of the adjacent bidirectional cone frustum bodies 71, the outer surface of the cone frustum body 7 is provided with the asymmetric bidirectional cone frustum body conical surface 72, the external threads 9 comprise a first spiral cone surface 721 of the cone frustum body, namely the left side, and a second spiral cone surface 722 of the cone frustum body, namely the right side and the external spiral threads 8, forming an asymmetric bidirectional tapered external thread 9, in a cross section passing through a thread axis, the complete single-section asymmetric bidirectional tapered external thread 9 is a special bidirectional tapered geometric body which is in a dumbbell-like shape 94 and has a small middle part and large two ends, an included angle between two plain lines of a left side conical surface, namely a first spiral conical surface 721 of the conical frustum, of the asymmetric bidirectional conical frustum 71 is a first taper angle alpha 1, namely a left side conical angle corresponding to the left side taper 95 of the asymmetric bidirectional tapered external thread 9, the left side taper 95 is distributed in a right direction 98, an included angle between two plain lines of a right side conical surface, namely a second spiral conical surface 722 of the conical frustum, of the asymmetric bidirectional conical frustum 71 is a second taper angle alpha 2, namely a right side conical angle corresponding to the right side taper 96 of the asymmetric bidirectional tapered external thread 9, the right side taper 96 is distributed in a left direction 97, and the corresponding taper directions of the first taper angle alpha 1 and the second taper angle alpha 2 are opposite, the element line is an intersection line of a conical surface and a plane passing through the axis of the cone, the shape formed by a first spiral conical surface 721 and a second spiral conical surface 722 of the conical frustum of the bidirectional conical frustum 71 is the same as the shape of the spiral outer side surface of a revolution body formed by two inclined sides of a right-angled trapezoid combination body which is superposed on the central axis of the columnar matrix 3, has the same lower bottom edge and the same upper bottom edge but different right-angled edges, is symmetrical and is joined oppositely, the right-angled edges of the right-angled trapezoid combination body circumferentially rotate at a constant speed by taking the rotary center as the right-angled edges of the revolution body, the right-angled trapezoid combination body simultaneously axially moves along the central axis of the columnar matrix 3 at a constant speed and is formed by two inclined sides of the right-angled trapezoid combination body, the right-angled trapezoid combination body is a special geometric body which has the same lower bottom edge and the same upper bottom edge but different right-angled edges, the upper bottom edges of the two right-angled trapezoids are symmetrical and are joined oppositely, and the lower bottom edges of the two ends of the right-angled combination body are respectively, the first spiral conical surface 721 of the conical frustum forms a left-side taper 95, the left-side taper 95 corresponds to a first taper angle α 1 of the asymmetric bidirectional tapered external thread 9, namely, a left-side conical angle corresponding to the left-side taper 95 of the asymmetric bidirectional tapered external thread 9, the left-side taper 95 is distributed in a right direction 98, the second spiral conical surface 722 of the conical frustum forms a right-side taper 96, the right-side taper 96 corresponds to a second taper angle α 2 of the asymmetric bidirectional tapered external thread 9, namely, a right-side conical angle corresponding to the right-side taper 96 of the asymmetric bidirectional tapered external thread 9, the right-side taper 96 is distributed in a left direction 97, and the corresponding taper directions of the first taper angle α 1 and the second taper angle α 2 are opposite.

That is, the above-mentioned external thread 9 of dumbbell 94 is formed by joining the upper top surfaces of two truncated cone bodies 7 having the same lower bottom surface and the same upper top surface but different heights of taper symmetrically and oppositely, and the lower bottom surfaces are located at both ends of the bidirectional truncated cone body 71, and when the asymmetric bidirectional tapered thread 1 of dumbbell 94 is formed, the external thread 9 is formed by joining the lower bottom surfaces of the adjacent bidirectional truncated cone bodies 71 with each other, and/or joining the lower bottom surfaces of the adjacent bidirectional truncated cone bodies 71 with each other spirally.

The external thread 9 like the dumbbell 94 includes a left side conical surface, i.e., a first spiral conical surface 721 of the truncated cone, and a right side conical surface, i.e., a second spiral conical surface 722 of the truncated cone, of the two-way conical surface 72, and an external spiral line 8, the shape formed by the first spiral conical surface 721 of the truncated cone and the second spiral conical surface 722 of the truncated cone, i.e., the two-way spiral conical surfaces, and the right-angle sides of a right-angle trapezoidal combination body which is symmetrical and oppositely joined with the upper bases of two right-angle trapezoids having the same lower base and the same upper base but different right-angle sides and which are superposed on the central axis of the columnar matrix 3 are taken as the rotation center, the rotation is performed at a uniform speed in the circumferential direction, the right-angle trapezoidal combination body simultaneously moves axially at a uniform speed along the central axis of the columnar matrix 3, and the shape of the spiral outer side of the revolution body formed by the two oblique sides of the right-angle trapezoidal combination body is the same.

The olive-like 93 asymmetric bidirectional tapered hole 41 is characterized in that the asymmetric bidirectional tapered hole is formed by symmetrically and oppositely jointing two bottom surfaces of two tapered holes with the same lower bottom surface and the same upper top surface but different taper heights, namely the two tapered holes with the same lower bottom surface and the same upper top surface but different taper heights have the lower bottom surfaces mutually jointed and the upper top surfaces are positioned at two ends of the bidirectional tapered hole 41 and form an asymmetric bidirectional tapered thread 1, the two tapered holes 4 respectively comprise the upper top surfaces mutually jointed with the adjacent bidirectional tapered hole 41 and/or are respectively mutually jointed with the upper top surfaces of the adjacent bidirectional tapered hole 41, the tapered hole 4 comprises an asymmetric bidirectional tapered hole conical surface 42, the internal thread 6 comprises a tapered hole first spiral conical surface 421, namely a left side conical surface, and a tapered hole second spiral conical surface 422, namely a right side conical surface and an internal spiral line 5 to form an asymmetric bidirectional tapered internal thread 6, in the section passing through the thread axis, the complete single-section asymmetric bidirectional tapered internal thread 6 is a special bidirectional tapered geometry with a large middle part and small two ends and in an olive-like shape 93, the left side conical surface of the bidirectional tapered hole 41, namely two prime lines of the first spiral conical surface 421 of the tapered hole, form an included angle which is a first taper angle alpha 1, namely a left side conical angle corresponding to the left side taper 95 of the asymmetric bidirectional tapered internal thread 6, the left side taper 95 is distributed in the left direction 97, the right side conical surface of the bidirectional tapered hole 41, namely two prime lines of the second spiral conical surface 422 of the tapered hole, form an included angle which is a second taper angle alpha 2, namely a right side conical angle corresponding to the right side taper 96 of the asymmetric bidirectional tapered internal thread 6, the right side taper 96 is distributed in the right direction 98, the corresponding taper directions of the first taper angle alpha 1 and the second taper angle alpha 2 are opposite, the prime lines are the intersection lines of the conical surfaces and the plane passing through the cone axis, the shape formed by the first spiral conical surface 421 of the tapered hole and the second spiral conical surface 422 of the tapered hole of the bidirectional tapered hole 41 is the same as the shape of the spiral outer side surface of the revolution body formed by two inclined sides of the right-angled trapezoidal combination body which is superposed on the central axis of the cylindrical parent body 2 and has the same lower bottom edge and the same upper bottom edge but different right-angled sides and is symmetrical with the lower bottom edge of the two right-angled trapezoids and is jointed oppositely, the right-angled trapezoidal combination body is a special geometric body which has the same lower bottom edge and the same upper bottom edge but different right-angled sides, the lower bottom edges of the two right-angled trapezoids are symmetrical and jointed oppositely, the upper bottom edges of the two right-angled trapezoids are respectively positioned at two ends of the right-angled trapezoidal combination body, the first spiral conical surface 421 of the tapered hole forms a left side taper 95, the left taper 95 corresponds to a first taper angle alpha 1 of the asymmetric bidirectional tapered internal thread 6, namely, a left taper angle corresponding to the left taper 95 of the asymmetric bidirectional tapered internal thread 6, the left taper 95 is distributed in a left direction 97, the second spiral taper 422 of the tapered hole forms a right taper 96, the right taper 96 corresponds to a second taper angle alpha 2 of the asymmetric bidirectional tapered internal thread 6, namely, a right taper angle corresponding to the right taper 96 of the asymmetric bidirectional tapered internal thread 6, the right taper 96 is distributed in a right direction 98, and the corresponding taper directions of the first taper angle alpha 1 and the second taper angle alpha 2 are opposite.

That is, the above-mentioned olive-like 93 internal thread 6 is formed by joining the lower bottom surfaces of two tapered holes 4 having the same lower bottom surface and the same upper top surface but different taper heights symmetrically and oppositely, and the upper top surfaces are located at both ends of the bidirectional tapered hole 41, and when the olive-like 93 asymmetric bidirectional tapered thread 1 is formed, the olive-like 93 internal thread 6 is formed by joining the upper top surfaces of the adjacent bidirectional tapered holes 41, and/or joining the upper top surfaces of the adjacent bidirectional tapered holes 41, respectively, spirally.

The olive-like 93 internal thread 6 includes a left side conical surface, i.e., a first conical hole spiral conical surface 421, a right side conical surface, i.e., a second conical hole spiral conical surface 422, and an internal spiral line 5 of the bidirectional conical hole conical surface 42, the shapes formed by the first conical hole conical surface 421 and the second conical hole conical surface 422, i.e., the bidirectional spiral conical surfaces, and the lower bases of two right trapezoids which have the same lower base and the same upper base but different right-angle sides and are superposed on the central axis of the cylindrical parent body 2 are symmetrical and oppositely jointed, the lower bases of the two right trapezoids are taken as the rotation center, the right-angle trapezoidal combination rotates in the circumferential direction at a constant speed and moves axially along the central axis of the cylindrical parent body 2 at a constant speed, and the spiral outer side of the rotary body formed by the two oblique sides of the right-angle trapezoidal combination has the same shape.

It is characterized in that the mutual thread matching of the thread connection pair 10 formed by the internal thread 6 and the external thread 9 comprises: different combinations of the left side taper 95 being less than the right side taper 96 olive-like 93 external thread 9 and the left side taper 95 being greater than the right side taper 96 dumbbell-like 94 internal thread 6 or the left side taper 95 being greater than the right side taper 96 dumbbell-like 94 external thread 9 and the left side taper 95 being less than the right side taper 96 olive-like 93 internal thread 6.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Although tapered thread 1, cylindrical parent body 2, nut body 21, cylindrical parent body 3, bolt body 31, tapered bore 4, bi-directional tapered bore 41, bi-directional tapered bore conical surface 42, tapered bore first helical conical surface 421, first taper angle α 1, tapered bore second helical conical surface 422, second taper angle α 2, internal thread 5, internal thread 6, frustum cone 7, bi-directional frustum cone 71, bi-directional frustum cone surface 72, frustum cone first helical conical surface 721, first taper angle α 1, frustum cone second helical conical surface 722, second taper angle α 2, external thread 8, external thread 9, olive-like 93, dumbbell-like 94, left-side taper 95, right-side taper 96, left-side distribution 97, right-side distribution 98, thread connection pair and/or thread pair 10, play 101, self-locking, self-positioning, pressure, taper angle, internal thread 6, frustum cone 7, bi-directional frustum cone 71, bi-directional frustum cone surface 72, frustum cone first helical conical surface 721, first taper angle α 1, cone frustum second helical conical surface 722, second taper angle α 2, external thread line 8, external thread 9, olive-like, Axis of taper 01, axis of thread 02, mirror image, sleeve, shaft, non-solid space, solid body of material, single cone, double cone, inner cone, tapered bore, outer cone, conical pair, helical structure, helical motion, threaded body, complete unit body thread, axial force angle, anti-axial force angle, centripetal force, counter-colinear, internal stress, bi-directional force, unidirectional force, plain bearing pair, and the like, but does not exclude the possibility of using other terms, which are used merely to more conveniently describe and explain the nature of the invention and to interpret them as any additional limitation contrary to the spirit of the invention.

Claims (11)

1. The dumbbell-like and olive-like asymmetric bidirectional tapered thread connection pair comprises an external thread (9) and an internal thread (6) which are in thread fit with each other, and is characterized in that the asymmetric bidirectional tapered thread (1) comprises a dumbbell-like (94) internal thread (6), an olive-like (93) internal thread (6), a dumbbell-like (94) external thread (9) and an olive-like (93) external thread (9), the complete unit body thread is a dumbbell-like (94) bidirectional conical body which is in a spiral shape, large in the middle, small in the two ends, large in the middle, large in the left-side taper (95) and larger in the left-side taper (95) than the right-side taper (96), and comprises a bidirectional tapered hole (41) and a bidirectional tapered platform body (71), and the internal thread (6) is a bidirectional tapered hole which is in a spiral shape, the inner surface of a cylindrical parent body (2) is in a spiral olive-like shape, or dumbbell-like (93) or dumbbell-like (94) bidirectional tapered hole (41) The outer surface of the cylindrical parent body (3) is a spiral olive-like (93) or dumbbell-like (94) -like bidirectional cone frustum body (71), a left side conical surface of the bidirectional cone body forms a left side conical surface (95) corresponding to a first cone angle alpha 1, a right side conical surface forms a right side conical surface (96) corresponding to a second cone angle alpha 2, the internal thread (6) and the external thread (9) contain the cone through conical holes until the internal conical surface and the external conical surface are mutually supported, and when the left side conical surface (95) is greater than the right side conical surface (96), the left side conical angle alpha 1 is greater than 0 degrees and smaller than 53 degrees, the second cone angle alpha 2 is greater than 0 degrees and smaller than 53 degrees, or the first cone angle alpha 1 is greater than 53 degrees and smaller than 180 degrees; when the left side taper (95) is smaller than the right side taper (96), wherein the first taper angle alpha 1 is larger than 0 degrees and smaller than 53 degrees, the second taper angle alpha 2 is larger than 0 degrees and smaller than 53 degrees, or the second taper angle alpha 2 is larger than or equal to 53 degrees and smaller than 180 degrees.

2. The pair of dumbbell-like and olive-like asymmetric bidirectional tapered thread connection according to claim 1, wherein the internal thread (6) of the dumbbell-like (94) includes a left-side conical surface (i.e., a first conical-hole-shaped conical surface (421) and a right-side conical surface (i.e., a second conical-hole-shaped conical surface (422) of the bidirectional conical-hole-shaped conical surface (42), and an internal spiral line (5), and the first conical-hole-shaped conical surface (421) and the second conical-hole-shaped conical surface (422), i.e., the bidirectional conical surfaces, form a shape that is centered around the edge of a right-angled trapezoid combination that is formed by joining the upper bases of two right-angled trapezoids having the same lower base and the same upper base but different right-angled edges and that are superposed on the central axis of the cylindrical parent body (2) and that are symmetric and joined with each other, and that rotates at a uniform speed in the circumferential direction and the right-angled trapezoid combination moves at the same time in the axial direction along the central axis of the cylindrical parent body (2), the spiral outer side surfaces of the revolution bodies formed by the two bevel edges of the right-angle trapezoidal combination bodies have the same shape; the external thread (9) of the dumbbell-like shape (94) comprises a left side conical surface, namely a first spiral conical surface (721) of the truncated cone, and a right side conical surface, namely a second spiral conical surface (722) of the truncated cone, of the conical surface (72) of the bidirectional truncated cone, and an external spiral line (8), and the shapes formed by the first spiral conical surface (721) of the truncated cone and the second spiral conical surface (722) of the truncated cone, namely the bidirectional spiral conical surface, the right-angle sides of a right-angle trapezoidal combination body which is symmetrical and oppositely jointed with the upper bottom sides of two right-angle trapezoids with the same lower bottom side and the same upper bottom side but different right-angle sides and is superposed on the central axis of the columnar parent body (3) are taken as the rotation center, the combination body rotates at a uniform speed in the circumferential direction and moves axially at a uniform speed along the central axis of the columnar parent body (3) at the same time, the spiral outer side surfaces of the revolution bodies formed by the two bevel edges of the right-angle trapezoidal combination bodies have the same shape; the olive-like (93) internal thread (6) comprises a left side conical surface, namely a first conical hole spiral conical surface (421), and a right side conical surface, namely a second conical hole spiral conical surface (422), of the bidirectional conical hole conical surface (42), and an internal spiral line (5), wherein the first conical hole spiral conical surface (421) and the second conical hole spiral conical surface (422), namely the bidirectional spiral conical surfaces, form shapes, the right-angle sides of a right-angle trapezoidal combination body which is symmetrical and oppositely jointed with the lower bottom sides of two right-angle trapezoids with the same lower bottom side and the same upper bottom side but different right-angle sides and is superposed on the central axis of the cylindrical parent body (2) are taken as the rotation center, the right-angle trapezoidal combination body rotates at a uniform speed in the circumferential direction and moves axially at a uniform speed along the central axis of the cylindrical parent body (2) at the same time, the spiral outer side surfaces of the revolution bodies formed by the two bevel edges of the right-angle trapezoidal combination bodies have the same shape; the olive-like (93) external thread (9) comprises a left side conical surface, namely a first spiral conical surface (721) of the truncated cone, and a right side conical surface, namely a second spiral conical surface (722) of the truncated cone, of the bidirectional conical surface (72), and an external spiral line (8), and the shapes formed by the first spiral conical surface (721) of the truncated cone and the second spiral conical surface (722) of the truncated cone, namely the bidirectional spiral conical surface, the right-angle sides of a right-angle trapezoidal combination body which is symmetrical and oppositely jointed with the lower bottom sides of two right-angle trapezoids with the same lower bottom side and the same upper bottom side but different right-angle sides and is superposed on the central axis of the columnar parent body (3) are taken as the rotation center, the combination body rotates at a uniform speed in the circumferential direction and moves axially at a uniform speed along the central axis of the columnar parent body (3) at the same time, and the spiral outer side surface of the revolution body formed by two bevel edges of the right-angle trapezoidal combination body has the same shape.

3. The pair of dumbbell-like and olive-like asymmetric bidirectional tapered threads as claimed in claim 2, wherein the axial movement distance of the right-angled trapezoidal combination is at least one time as long as the sum of the right-angled sides of the right-angled trapezoidal combination when the right-angled trapezoidal combination rotates at a constant speed for one circle.

4. The pair of dumbbell-like and olive-like asymmetric bidirectional tapered threads of claim 2, wherein the distance of axial movement of the right-angled trapezoidal combination is equal to the sum of the right-angled sides of the right-angled trapezoidal combination when the right-angled trapezoidal combination rotates at a constant speed for one revolution.

5. The pair of dumbbell-like and olive-like asymmetric bidirectional tapered threads as claimed in claim 2, wherein the left and right tapered surfaces of the bidirectional tapered body, i.e. the first conical tapered hole surface (421) and the second conical tapered hole surface (422) and the inner spiral (5), are continuous helical surfaces or discontinuous helical surfaces, and the first conical tapered body surface (721), the second conical tapered body surface (722) and the outer spiral (8) are continuous helical surfaces or discontinuous helical surfaces.

6. The dumbbell-like and olive-like asymmetric bidirectional tapered thread connection pair according to claim 1, wherein the internal thread (6) of the dumbbell-like (94) is formed by symmetrically and oppositely joining the upper top surfaces of two tapered holes (4) with the same lower bottom surface and the same upper top surface but different taper heights, and the lower bottom surfaces are positioned at two ends of the bidirectional tapered hole (41), and when the asymmetric bidirectional tapered thread (1) of the dumbbell-like (94) is formed, the internal thread (6) is formed by respectively joining the lower bottom surfaces of the adjacent bidirectional tapered holes (41) with each other and/or by respectively joining the lower bottom surfaces of the adjacent bidirectional tapered holes (41) with each other in a spiral shape; the olive-like (93) internal thread (6) is formed by symmetrically and oppositely jointing the lower bottom surfaces of two conical holes (4) with the same lower bottom surface and the same upper top surface but different cone heights, the upper top surfaces are positioned at two ends of a bidirectional conical hole (41), and when the olive-like (93) asymmetric bidirectional conical thread (1) is formed, the olive-like (93) internal thread (6) is respectively jointed with the upper top surfaces of the adjacent bidirectional conical holes (41) and/or is spirally jointed with the upper top surfaces of the adjacent bidirectional conical holes (41) to form the internal thread (6); the external thread (9) of the dumbbell-like (94) is formed by connecting the upper top surfaces of two cone frustum bodies (7) with the same lower bottom surface and the same upper top surface but different cone heights in a symmetrical and opposite manner, wherein the lower bottom surfaces are positioned at two ends of the two-way cone frustum body (71), and when the asymmetric two-way tapered thread (1) of the dumbbell-like (94) is formed, the external thread (9) is formed by respectively connecting the lower bottom surfaces of the two-way cone frustum bodies (71) adjacent to each other and/or respectively connecting the lower bottom surfaces of the two-way cone frustum bodies (71) adjacent to each other in a spiral manner; the olive-like (93) external thread (9) is formed by symmetrically and oppositely jointing the lower bottom surfaces of two cone-shaped bodies (7) with the same lower bottom surface and the same upper top surface but different cone heights, and the upper top surfaces are positioned at two ends of the two-way cone-shaped body (71), and when the olive-like (93) asymmetric two-way tapered thread (1) is formed, the olive-like (93) external thread (9) is formed by respectively mutually jointing the upper top surfaces of the adjacent two-way cone-shaped bodies (71) and/or respectively mutually jointing the upper top surfaces of the adjacent two-way cone-shaped bodies (71) to form a spiral shape.

7. The dumbbell-like and olive-like asymmetric bidirectional tapered threaded connection pair as claimed in claim 1, characterized in that the mutual threaded cooperation of the threaded connection pair (10) consisting of the internal thread (6) and the external thread (9) comprises: different combinations of the left side taper (95) being smaller than the right side taper (96) olive-like (93) external thread (9) and the left side taper (95) being larger than the right side taper (96) dumbbell-like (94) internal thread (6) or the left side taper (95) being larger than the right side taper (96) dumbbell-like (94) external thread (9) and the left side taper (95) being smaller than the right side taper (96) olive-like (93) internal thread (6).

8. The dumbbell-like and olive-like asymmetric bidirectional tapered threaded connection pair according to claim 1, characterized in that the internal thread (6) and the external thread (9) form a threaded connection pair (10), the threaded connection pair (10) is formed by mutually sizing and matching a spiral bidirectional tapered hole (41) and a spiral bidirectional frustum (71) under the guidance of a spiral line, a clearance (101) is formed between the bidirectional tapered hole (41) and the bidirectional tapered hole (71), the tapered hole (4) of the internal thread (6) bidirectionally accommodates the external thread (9) and the frustum (7), and each section of the internal thread (6) and the external thread (9) comprises one-side bidirectional bearing and/or left-right bidirectional bearing.

9. The asymmetric bidirectional tapered thread connection pair of dumbbell-like and olive-like shapes according to claim 1, wherein the internal thread (6) and the external thread (9) form a thread connection pair (10), which is supported by the contact surface of the first spiral conical surface (421) and the second spiral conical surface (422) of the tapered hole and the first spiral conical surface (721) and the second spiral conical surface (722) of the truncated cone, which are matched with each other, or the inner and outer diameters of the inner cone and the outer cone are centered under the guidance of the spiral line until the bidirectional tapered hole conical surface (42) and the bidirectional tapered cone conical surface (72) are in self-positioning contact or self-locking.

10. The pair of dumbbell-like and olive-like asymmetric bidirectional tapered threaded connections according to claim 1, characterized in that the cylindrical parent body (3) is solid or hollow, including cylindrical and/or non-cylindrical workpieces or objects that need to be provided with bidirectional tapered external threads (9) on their outer surfaces, the cylindrical parent body (2) includes cylindrical and/or non-cylindrical workpieces or objects that need to be provided with bidirectional tapered internal threads (6) on their inner surfaces, and the outer or inner surfaces include cylindrical surfaces and/or non-cylindrical surfaces including tapered surfaces.

11. The pair of dumbbell-like and olive-like asymmetric bidirectional tapered threads as claimed in claim 1, wherein the internal threads (6) and/or external threads (9) comprise a single-section thread with an incomplete tapered geometry, i.e., a single-section thread with an incomplete unit-body thread.

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