CN213628385U - External thread of olive-like asymmetric bidirectional tapered thread and traditional thread connection structure - Google Patents

Abstract

The utility model belongs to the technical field of equipment is general, a kind of asymmetric two-way toper screw thread external screw thread of olive form and traditional threaded connection structure are related to, the current screw thread is solved from the poor scheduling problem of location and auto-lock nature, characterized by, external screw thread (9) are that column parent (3) outward surface is heliciform and complete unit body screw thread is that left side tapering (95) are greater than and/or are less than right side tapering (96) kind olive form (93) two-way frustum body (71) (material entity), traditional internal screw thread (6) ability of assimilating has, internal screw thread (6) are tube-shape parent (2) internal surface and are heliciform special bell mouth (4), the performance mainly depends on the flank of a thread and tapering size, advantages: the inner and outer threads are contained by the cone through the taper hole, and a section of cone pair is formed by the special taper hole (4) and the bidirectional cone frustum body (71) to form a 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

External thread of olive-like asymmetric bidirectional tapered thread and traditional thread connection structure

Technical Field

The utility model belongs to the technical field of equipment is general, especially, relate to an asymmetric two-way toper screw thread external screw thread of olive form and traditional threaded connection structure (hereinafter "two-way toper external screw thread and traditional screw thread").

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, the thread is not a specific product and is a key common technology of the industry, the technical performance of the thread must be embodied by using the specific product as an application carrier, and 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 8) (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 9) 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. 10), 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.

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 scientific and technological progress, destroy the more non-static more non-room temperature environment of non-pure linear load to connecting, there is the non-linear load of linear load 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 connection structure of two-way toper external screw thread and traditional screw thread that reasonable in design, simple structure have good connection performance, locking performance.

In order to achieve the above purpose, the utility model adopts the following technical proposal: the connecting structure of the bidirectional conical external thread and the traditional thread is a threaded connecting pair consisting of an asymmetric bidirectional conical thread external thread and a traditional thread internal thread, is a special thread pair technology combining technical characteristics of a conical pair and a spiral motion, is a thread technology combining technical characteristics of a bidirectional conical body and a spiral structure, is formed by two single-conical bodies with opposite directions of left-side conicity and right-side conicity and different conicities in a bidirectional way, is spirally distributed on the outer surface of a columnar matrix to form the external thread, is a helical asymmetric special bidirectional conical geometric body with small middle ends and small left-side conicity larger than right-side conicity and/or left-side conicity smaller than right-side conicity, is in a similar olive shape, namely, the complete unit body thread of the external thread is a similar olive-shaped asymmetric bidirectional cone frustum which is in a spiral shape, has a large middle and small two ends, and has the left side taper different from the right side taper.

This two-way toper external screw thread and traditional screw thread, the asymmetric two-way toper external screw thread of similar olive form include that left side tapering is greater than right side tapering and left side tapering is less than two kinds of forms of right side tapering, its definition can express as: the special olive-like bidirectional conical geometric body which is provided with a left-side conical degree and a right-side conical degree, has opposite left-side conical degree and right-side conical degree and different conical degrees, is continuously and/or discontinuously distributed along a spiral line, is large in middle and small in two ends is arranged on the outer surface of a cylinder or a cone. "for manufacturing reasons, the thread head and the thread tail of the asymmetric bidirectional tapered thread may be incomplete bidirectional tapered geometry. Different from the modern thread technology, the mutual thread matching is changed from the meshing relationship of the internal thread and the external thread of the modern thread into the embracing relationship of the internal thread and the external thread of the bidirectional conical thread.

This two-way toper external screw thread and traditional screw thread, including being the two-way frustum body that the heliciform distributes in column parent surface, including the external screw thread and the internal thread of screw-thread fit each other promptly, the internal thread exists in order to be the special bell mouth of heliciform and with "non-entity space" form, external screw thread exists in order to be the two-way frustum body of heliciform and with "material entity" form, non-entity space mean the space environment that can hold above-mentioned material entity, the internal thread is the container, the external screw thread is by the container: traditional internal thread holds the two-way toper external screw thread of holding one section of package that the special bell mouth that forms is two-way frustum body promptly because of the contact with two-way toper external screw thread, promptly the internal thread screw body be that traditional screw thread tooth body and the external screw thread contact of tube-shape parent internal surface form be the heliciform bell mouth, internal thread and external screw thread are that one section of two-way toper geometry closes to cup joint together soon and hold up until one side two-way bears or the left side right side two-way bears simultaneously or until sizing interference fit, whether both sides are two-way simultaneously bears and are relevant with applied operating mode, the two-way frustum body of holding is held to special bell mouth one section of package promptly, the internal thread is that one section of package corresponds the external screw thread promptly.

The thread connection pair is a cone pair formed by mutually matching a spiral outer conical surface and a spiral inner conical surface, the outer conical surface of the bidirectional conical thread outer cone is a bidirectional conical surface, when the bidirectional conical external thread and the traditional internal thread form a threaded connection pair, the joint surface of the special conical surface of the traditional internal thread and the external conical surface of the bidirectional conical external thread is taken as a supporting surface, the connecting technical performance, the self-locking property, the self-positioning property, the reusability, the fatigue resistance and other capabilities of the thread pair are mainly determined by the conical surface of the conical frustum of the bidirectional conical external thread forming the bidirectional conical external thread and the traditional thread and the taper size of the conical surface, and the special conical surface and the taper of the special conical hole formed by the contact of the traditional thread internal thread and the bidirectional conical external thread, so that the thread is a non-thread type thread. Compared with the existing screw thread inclined plane principle which shows that the unidirectional force is distributed on the inclined plane and the internal and external threads are the meshing relation of the internal tooth body and the external tooth body, the bidirectional conical external thread and the traditional screw thread, the external thread body which is the bidirectional conical body is in a bidirectional state through a conical axis section, the single conical body which is distributed on any one of the left side or the right side is composed of two prime lines of a cone in a bidirectional way, the prime line is an intersection line of a conical surface and a plane which passes through the conical axis, the conical principle of the connecting structure of the bidirectional conical external thread and the traditional screw thread shows axial force and counter axial force which are both synthesized by bidirectional force, the axial force is opposite to the corresponding counter axial force, the internal thread and the external thread are in a cohesive relation, namely, a thread pair is formed by that the internal thread embraces the external thread, namely a cone (internal cohesion) and a corresponding one-section cone (external) until cohesive sizing are matched 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 together through the special taper hole and the cone frustum body, so that self-locking or self-positioning of a thread pair is realized, and the thread connection pair formed by the non-traditional thread inner thread and the outer thread is realized through mutual abutting of a tooth body and the tooth body. 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, 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 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 smaller than 180 degrees and larger 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 or smaller than 127 degrees and larger 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 changes in the direction of attenuation trend until the self-locking performance is completely unavailable, and the axial bearing capacity changes in the direction of enhancement trend.

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 is in a strong self-positioning state, strong self-positioning of the inner and outer cones is easily achieved, when the axial force angle and/or the anti-axial force angle are infinitely close to 180 degrees, the self-positioning capability of the inner and outer cones of the conical pair is strongest, the axial force angle and/or the anti-axial force angle are equal to or less than 127 degrees and more than 0 degrees, the conical pair is in a weak self-positioning state, the axial force angle and/or the anti-axial force angle tend to change towards the direction infinitely close to 0 degrees, and the self-positioning capability of the inner and outer cones of the conical pair changes in the direction of attenuation trend until the inner and outer cones.

Compared with the contained relation of the irreversible single-side bidirectional contained relation that the single-cone-shaped unidirectional conical thread of the single cone can only bear the conical surface on the single side, the reversible left-right bidirectional contained relation of the bidirectional conical thread of the double cone can respectively bear the left-side bearing of the conical surface and/or bear the right-side conical surface of the left-side conical surface in a bidirectional and simultaneous manner, disordered freedom degree between a special conical hole and the cone frustum is further limited, the spiral motion enables the bidirectional conical external thread and the traditional thread connecting structure to obtain necessary ordered freedom degree, and the technical characteristics of the conical pair and the thread pair are effectively synthesized to form a brand new thread technology.

When the connecting structure of the bidirectional conical external thread and the traditional thread is used, the conical surface of the bidirectional conical frustum of the bidirectional conical external thread is matched with the special conical surface of the special conical hole of the traditional internal thread.

The bidirectional tapered external thread and the traditional thread, the bidirectional tapered external thread, namely the cone frustum body, can realize self-locking and/or self-positioning of the threaded connection pair without any taper or any taper angle, the outer cone body must reach a certain taper or a certain taper angle, the bidirectional tapered external thread and the traditional thread only have self-locking and self-positioning properties, the taper comprises a left side taper and a right side taper of the external thread body, 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 larger 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, preferably, the value of the first taper angle alpha 1 is 2-40 degrees, in individual special fields, preferably, the angle of the first taper angle alpha 1 is more than or equal to 53 degrees and less than 180 degrees, preferably, the value of 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 conical external thread is characterized in that the columnar matrix is provided with a screw rod body, the outer surface of the screw rod body is provided with a cone frustum body which is spirally distributed, the cone frustum body comprises a bidirectional cone frustum body, the columnar matrix can be solid or hollow and comprises workpieces and objects which need to be threaded on the outer surface of the columnar matrix, such as cylinders and/or non-cylinders, and the outer surface of the columnar matrix comprises outer surface geometrical shapes such as non-cylindrical surfaces such as cylindrical surfaces and conical surfaces.

The bidirectional conical external thread is characterized in that the thread is formed by the fact that 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 are symmetrical and are mutually jointed in opposite directions to form a spiral thread, the upper top surfaces of the two conical frustum bodies are positioned at two ends of the bidirectional conical frustum bodies, and the olive-like asymmetrical bidirectional conical thread is formed by mutually jointing the upper top surfaces of the two conical frustum bodies and/or mutually jointing the upper top surfaces of the two conical frustum bodies to form a spiral thread, the external thread comprises a first spiral conical surface of the conical frustum body, namely a left conical surface, and a second spiral conical surface of the conical frustum body, namely a right conical surface and an external spiral line, and in a section passing through the axis of the thread, the complete single-section bidirectional asymmetric conical external thread is a special bidirectional conical geometric body with a large middle part and small two ends, the asymmetric bidirectional cone frustum comprises a bidirectional cone frustum conical surface, wherein the included angle between two element lines of the left conical surface, namely a first spiral conical surface of the cone frustum is a first cone angle alpha 1, the first spiral conical surface of the cone frustum forms a left conical degree and is distributed in the left direction, the left conical degree corresponds to the first cone angle alpha 1, the included angle between two element lines of the right conical surface, namely a second spiral conical surface of the cone frustum is a second cone angle alpha 2, the second spiral conical surface of the cone frustum forms a right conical degree and is distributed in the right direction, the right conical degree corresponds to the second cone angle alpha 2, the conical directions of the first conical degree alpha 1 and the second conical angle alpha 2 are opposite, the element lines are intersection lines of a conical surface and a plane passing through a cone axis, and the shape formed by the first spiral conical surface of the cone frustum and the second spiral conical surface of the cone frustum is the same as the right-angle base line superposed on the columnar parent body and is the same as the right-angle base line and the upper base line is the same as the right- The lower bases of two different right trapezoid bodies are symmetrical, the right-angle sides of the right trapezoid bodies which are jointed oppositely are the same in shape of the spiral outer side surface of the revolution body formed by the two inclined sides of the right trapezoid bodies, the rotation center rotates circumferentially at a constant speed, the right trapezoid bodies simultaneously move axially along the central axis of the columnar matrix at a constant speed, and the right trapezoid bodies are special geometric bodies which are provided with two right trapezoid bodies which are the same in lower bases, the same in upper bases and different in right-angle sides, are symmetrical and jointed oppositely, and the upper bases are respectively positioned at the two ends of the right trapezoid bodies.

The bidirectional tapered external thread has the unique technical characteristics and advantages that the thread body is a tapered body, namely a cone frustum body, and has strong capability of assimilating different threads, namely the capability of assimilating the traditional thread matched with the bidirectional tapered external thread into the special tapered thread with the same technical characteristics and properties as the thread body, the traditional thread after being assimilated by the tapered thread is a dissimilated traditional thread, namely the dissimilated traditional thread, the appearance of the thread body is not greatly different from that of a traditional thread tooth body, but the substantial technical content of the thread body of the traditional thread is not possessed, the thread body is changed from the original traditional thread tooth body into the special tapered geometric body with the thread body properties, namely the tapered body properties and the technical characteristics of the tapered thread, the special tapered geometric body has a special conical surface which can be matched with the spiral conical surface of the tapered thread in the radial direction, and the traditional thread comprises a triangular thread, a cone, Trapezoidal threads, zigzag threads, rectangular threads, circular arc threads and the like can be screwed with the bidirectional tapered threads to form other geometrical threads of the threaded connection pair, but the threads are not limited to the threads.

When the traditional internal thread and the bidirectional tapered external thread are matched to form a threaded connection pair, the traditional internal thread is not the traditional thread in the original meaning but a tapered thread in a special form assimilated by the tapered thread, and the contact part of the traditional internal thread and the bidirectional tapered external thread forms the inner surface of a special tapered hole of the traditional internal thread of the threaded connection pair, which can be matched with the spiral conical surface of the tapered thread, namely the special tapered hole is provided with a special conical surface, the effective conical surface area of the special conical surface on the special tapered hole of the traditional internal thread is continuously increased along with the increase of the screwing use times, namely the special conical surface is continuously increased and tends to have larger contact surface direction change with the conical surface of the conical frustum of the bidirectional tapered external thread, so that the special tapered hole which has incomplete tapered geometric shape and has the technical spirit of the invention is formed substantially, furthermore, the special taper hole is a thread body formed by assimilation contact of a traditional internal thread edge and a bidirectional taper external thread, and is a special taper geometric body transformed from a traditional internal thread tooth body, the special taper hole radially has an inner surface matched with the taper surface of the bidirectional taper frustum body, namely, a special taper surface, namely, the thread connection pair is formed by mutually matching a spiral external cone surface, namely, an external cone surface of the bidirectional taper external thread, and a spiral special internal cone surface, namely, a special taper hole special taper surface formed by contact of a traditional internal thread edge and the bidirectional taper external thread to form a taper pair, the external cone surface, namely, an external cone surface of the cone frustum body is a bidirectional taper surface, the traditional thread after assimilation is a dissimilarity traditional thread which is a dissimilarity traditional thread, is a special form taper thread, the internal cone surface of the special taper thread of the special taper internal thread, namely, the special taper surface of the traditional internal thread firstly appears in a linear form, the inner conical surface is gradually increased along with the increase of the contact use times of the traditional internal thread cusp and the cone frustum body of the bidirectional conical external thread, namely the special conical surface of the traditional internal thread is continuously changed and increased from a microscopic surface (a macroscopic surface is a line) to a macroscopic surface, and the inner conical surface matched with the bidirectional conical external thread can be directly processed at the cusp part of the traditional internal thread, which all accord with the technical spirit of the invention. The bidirectional tapered external thread and the traditional thread are characterized in that the cylindrical parent body is provided with a nut body, the inner surface of the nut body is provided with special tapered holes which are distributed spirally, the special tapered holes are special tapered holes formed by the fact that the traditional internal thread is in contact with the bidirectional tapered external thread, special conical surfaces are arranged on the special tapered holes, the cylindrical parent body comprises a cylinder body and/or a non-cylinder body and other workpieces and objects which need to be processed with the internal thread on the inner surface, and the inner surface comprises the inner surface geometrical shapes such as cylindrical surfaces, conical surfaces and other non-cylindrical surfaces. When the connecting structure of the bidirectional tapered external thread and the traditional thread works, the relation between the connecting structure and a workpiece comprises rigid connection and non-rigid connection. The rigid connection refers to a nut bearing surface and a workpiece bearing surface which are bearing surfaces, and comprises a single nut, a double nut and other structural forms, the non-rigid connection refers to two nuts with opposite side end surfaces bearing surfaces and/or two nuts with a gasket between the opposite side end surfaces, and the two nuts are indirectly bearing surfaces, and is mainly applied to non-rigid connection workpieces such as non-rigid materials or transmission parts or application fields such as requirements and the like needing to be met through double nut installation, the workpieces refer to connected objects including the workpieces, and the gasket refers to a spacer including the gasket.

The bidirectional conical external thread and the traditional thread adopt a bidirectional conical thread bolt and traditional thread double-nut connecting structure, when the connection between the bidirectional conical thread bolt and the traditional thread double-nut is rigid connection with a fastened workpiece, the conical thread bearing surface is different, when the cylindrical parent body is positioned on the left side of the fastened workpiece, namely the left side end surface of the fastened workpiece, and the right side end surface of the cylindrical parent body, namely the left side nut body is the locking bearing surface of the left side nut body and the fastened workpiece, the right side spiral conical surface of the cylindrical parent body, namely the bolt bidirectional conical thread is the conical thread bearing surface, namely the traditional internal thread special conical surface and the second spiral conical surface of the bidirectional conical external thread conical frustum are conical thread bearing surfaces, and the traditional internal thread special conical surface and the second spiral conical surface of the conical frustum are bearing surfaces mutually, when the cylindrical parent body is positioned on the right side of the fastened workpiece, namely the right side end surface of the fastened workpiece, the cylindrical parent body, namely the left spiral conical surface of the bidirectional conical thread of the bolt is a conical thread bearing surface, namely the traditional internal thread special conical surface and the first spiral conical surface of the bidirectional conical external thread frustum are conical thread bearing surfaces, and the traditional internal thread special conical surface and the first spiral conical surface of the frustum are mutually bearing surfaces.

The bidirectional tapered external thread and the traditional thread adopt a connection structure of a bidirectional tapered thread bolt and a traditional thread single nut, and when the connection structure is rigidly connected with a fastened workpiece, when the hexagon head of the bolt is positioned on the left side, the cylindrical parent body, namely the nut body, namely the single nut is positioned on the right side of the fastened workpiece, when the connection structure of the bolt and the single nut works, the right end surface of the workpiece and the left end surface of the nut body are locking and supporting surfaces of the nut body and the fastened workpiece, the cylindrical parent body, namely the left spiral conical surface of the bidirectional tapered thread of the bolt is a tapered thread supporting surface, namely a traditional internal thread special conical surface and a first spiral conical surface of the bidirectional tapered external thread conical frustum are conical thread supporting surfaces, and the traditional internal thread special conical surface and the first spiral conical surface of the conical frustum are; when the hexagonal head of the bolt is positioned on the right side, the cylindrical parent body, namely the nut body, namely the single nut is positioned on the left side of the fastened workpiece, when the bolt and single nut connecting structure works, the left side end face of the workpiece and the right side end face of the nut body are locking and supporting faces of the nut body and the fastened workpiece, the cylindrical parent body, namely the right spiral conical face of the bidirectional conical thread of the bolt is a conical thread supporting face, namely the traditional internal thread special conical face and the second spiral conical face of the bidirectional conical external thread conical frustum are conical thread supporting faces, and the traditional internal thread special conical face and the second spiral conical face of the conical frustum are supporting faces.

The bidirectional conical external thread and the traditional thread are in a connection structure of a bidirectional conical thread bolt and a traditional thread double nut, and when the connection structure is in non-rigid connection with a fastened workpiece, the conical thread bearing surfaces are different, the cylindrical parent body comprises a left nut body and a right nut body, the right end surface of the left nut body is in direct contact with the left end surface of the right nut body in opposite directions and is a locking bearing surface, when the right end surface of the left nut body is the locking bearing surface, the cylindrical parent body, namely the right spiral conical surface of the bidirectional conical thread of the bolt is the conical thread bearing surface, namely the traditional internal thread special conical surface and the second spiral conical surface of the bidirectional conical external thread conical frustum are the conical thread bearing surfaces, when the left end surface of the right nut body is the locking bearing surface, the cylindrical parent body, namely the left spiral conical surface of the bidirectional conical thread of the bolt is the conical thread bearing surface, namely, the traditional internal thread special conical surface and the first spiral conical surface of the bidirectional conical external thread frustum are conical thread bearing surfaces, and the traditional internal thread special conical surface and the first spiral conical surface of the frustum are mutually bearing surfaces.

The bidirectional tapered external thread and the traditional thread adopt a bidirectional tapered thread bolt and traditional thread double-nut connecting structure, when the bidirectional tapered thread bolt and the traditional thread double-nut connecting structure are in non-rigid connection with a fastened workpiece, tapered thread bearing surfaces are different, a cylindrical parent body comprises a left nut body and a right nut body, a spacer such as a gasket is arranged between the two cylindrical parent bodies, namely the left nut body and the right nut body, the right end surface of the left nut body and the left end surface of the right nut body are in opposite indirect contact through the gasket, the two cylindrical parent bodies are indirectly locking bearing surfaces, when the cylindrical parent bodies are positioned on the left side of the gasket, namely the left side surface of the gasket, and the right end surface of the left nut body is the locking bearing surface of the left nut body, a cylindrical parent body, namely a bidirectional tapered thread right spiral conical surface of the bolt is a tapered thread bearing surface, namely a traditional internal thread special conical surface and a second spiral conical surface of the bidirectional tapered external thread conical frustum When the cylindrical parent body is positioned on the right side of the gasket, namely the right side surface of the gasket, and the left side end surface of the right nut body is a locking bearing surface of the right nut body, the cylindrical parent body, namely the left spiral conical surface of the bidirectional conical thread of the bolt, is a conical thread bearing surface, namely the traditional internal thread special conical surface and the first spiral conical surface of the bidirectional conical external thread frustum are conical thread bearing surfaces, and the traditional internal thread special conical surface and the first spiral conical surface of the frustum are mutually bearing surfaces.

Further, when the cylindrical parent body on the inner side, i.e., the nut body adjacent to the fastened workpiece, is effectively combined with the cylindrical parent body, i.e., the screw body, i.e., the bolt, so that the internal thread and the external thread forming the threaded connection pair are effectively embraced together, the cylindrical parent body on the outer side, i.e., the nut body which is not adjacent to the fastened workpiece, can be kept in an original state and/or disassembled according to application conditions and only one nut is left (for example, in application fields requiring light weight of equipment or requiring double nuts to ensure reliability of connection technology and the like), the disassembled nut body is not used as a connecting nut but used as an installation process nut, the internal thread of the installation process nut is not manufactured by traditional threads and comprises triangular threads, trapezoidal threads, zigzag threads and zigzag threads, but is not limited to the above, and can be adopted by the application method, and can also be manufactured by bidirectional tapered threads and unidirectional tapered threads which The threaded connection pair is a closed-loop fastening technical system, namely the threaded connection pair is an independent technical system after the internal thread and the external thread of the threaded connection pair are effectively locked together, the technical effectiveness of the connection technical system is ensured without depending on the technical compensation of a third person, namely the effectiveness of the threaded connection pair is not influenced even if no other objects are supported, including a gap between the threaded connection pair and a fastened workpiece, the method is favorable for greatly reducing the weight of the equipment, removing ineffective load, improving the technical requirements of the equipment on effective load capacity, braking performance, energy conservation, emission reduction and the like, the thread technical advantages which are unique to the connection structure of the bidirectional tapered external thread and the traditional thread and the fastened workpiece whether the connection structure is non-rigid connection or rigid connection and are not possessed by other thread technologies are achieved.

The bidirectional tapered external thread is in transmission connection with the traditional thread, the bidirectional bearing is realized by screwing and connecting the special taper hole of the traditional internal thread with the bidirectional frustum body, when the external thread and the internal thread form a thread pair, a clearance is required between the bidirectional frustum body and the special taper hole of the traditional internal thread, if oil and other media are lubricated between the internal thread and the external thread, a bearing oil film is easily formed, and the clearance is favorable for forming the bearing oil film. According to the design of application working conditions, the conical external thread frustum is contained in the traditional internal thread special conical hole in a bidirectional mode, and the conical external thread frustum is positioned in multiple directions such as the radial direction, the axial direction, the angular direction and the circumferential direction, preferably, the bidirectional conical frustum is contained in the special conical hole, the radial direction and the circumferential direction main positioning are assisted with the axial direction and the angular direction auxiliary positioning, so that the inner conical body and the outer conical body are positioned in multiple directions until the special conical surface of the special conical hole is embraced with the conical surface of the bidirectional conical frustum to achieve self-positioning or self-locking is generated until fixed diameter interference contact is achieved, a special conical pair and thread pair synthesis technology is formed, and the precision, the efficiency and the reliability of transmission connection of a conical thread technology, particularly. The bidirectional conical external thread and the traditional thread are tightly connected and hermetically connected, the technical performance is realized by the screwing connection of the traditional internal thread special conical hole and the conical external thread bidirectional conical frustum body, namely, the sizing of the first spiral conical surface of the conical frustum body and the traditional internal thread special conical hole special conical surface is realized until interference and/or the sizing of the second spiral conical surface of the conical frustum body and the traditional internal thread special conical hole special conical surface is realized until interference, and according to the application working condition, one-direction bearing and/or two-direction simultaneous bearing are achieved, namely, the internal and external diameters of the traditional internal thread special conical hole inner cone and the conical external thread outer cone are centered until the traditional internal thread special conical hole special conical surface and the conical external thread outer cone are clasped until the traditional internal thread special conical hole special conical surface and the conical frustum body first spiral conical surface are contacted and/or the traditional internal thread special conical hole special conical surface and the conical frustum body are clasped until the interference contact and/or the The second spiral conical surface is embraced until interference contact is achieved, namely the self-locking and radial, axial, angular, circumferential and other multi-directional positioning of the cone-shaped external thread bidirectional outer cone is contained through the traditional internal thread special conical hole, preferably, the special taper hole contains the bidirectional cone frustum and the radial and circumferential main positioning is assisted with the axial and angular auxiliary positioning to form the multi-directional positioning of the inner cone and the outer cone until the special taper surface of the special taper hole is embraced with the taper surface of the bidirectional cone frustum to realize self-positioning or until the sizing interference contact generates self-locking, thereby forming a special synthesis technology of a cone pair and a thread pair, ensuring the efficiency and reliability of a taper thread technology, in particular a connection structure of the bidirectional taper external thread and the traditional thread, therefore, the technical performances of connection, locking, looseness prevention, bearing, fatigue, sealing and the like of the mechanical mechanism are realized.

Therefore, the technical performances of the mechanical mechanism of the connection structure of the bidirectional conical external thread and the traditional thread, such as high transmission precision efficiency, high 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, namely the corresponding second cone angle alpha 2, and are also related to the traditional internal thread, namely the traditional internal thread special inner conical surface formed by contacting with the bidirectional conical external thread, and the conical degree of the traditional internal thread. The material friction coefficient, the processing quality and the application working condition of the columnar matrix and the cylindrical matrix also have certain influence on the conical matching.

When the right-angle trapezoid combination body rotates at a constant speed for one circle, the axial movement distance of the right-angle trapezoid 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 and the second spiral conical surface of the truncated cone body 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 special conical surface of the traditional internal thread special conical hole.

When the right-angle trapezoid combination body rotates at a constant speed for one circle, the axial movement distance of the right-angle trapezoid 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 and the second spiral conical surface of the truncated cone body 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 special conical surface of the traditional internal thread special conical hole.

The bidirectional conical external thread and the traditional thread are characterized in that 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 special conical surface of the special conical hole is a continuous helical surface or a discontinuous helical surface.

In the bidirectional conical external thread and the traditional thread, one end and/or two ends of the columnar parent body can be screwed in the screwing-in end of the connecting hole of the tubular parent body, and the thread connection function is realized through the contact and/or interference fit of the special conical surface of the traditional internal thread and the first spiral conical surface of the conical external thread frustum and/or the contact and/or interference fit of the special conical surface of the traditional internal thread and the second spiral conical surface of the conical external thread frustum.

In the bidirectional tapered external thread and the traditional thread, one end of the columnar parent body is provided with a head part with the 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 a head part with the diameter smaller than the bidirectional tapered external thread of the threaded rod body of the columnar parent body, and the connecting hole is a threaded hole arranged on 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 connecting structure of the bidirectional conical external thread and the traditional thread 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 connection structure between an olive-like (left side taper is greater than right side taper) asymmetric bidirectional tapered threaded bolt and a conventional threaded double nut according to a first embodiment of the present invention.

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

Fig. 3 is a schematic view of a connection structure between the olive-like (left side taper is larger than right side taper) asymmetric bidirectional tapered threaded bolt of the second embodiment and the conventional threaded double nut.

Fig. 4 is a schematic view of a connection structure between the olive-like (left side taper smaller than right side taper) asymmetric bidirectional tapered threaded bolt according to the third embodiment of the present invention and a conventional threaded double nut.

Fig. 5 is a schematic view of an olive-like (left side taper smaller than right side taper) asymmetric bidirectional tapered thread external thread and a complete unit body thread structure thereof according to a third embodiment of the present invention.

Fig. 6 is a connection structure diagram of a bolt and a conventional internal thread double nut hybrid combination including two kinds of olive-shaped asymmetric bidirectional tapered external threads, such as a similar olive-shaped (left side taper is smaller than right side taper) asymmetric bidirectional tapered thread and a similar olive-shaped (left side taper is larger than right side taper) asymmetric bidirectional tapered thread, in accordance with the fourth embodiment of the present invention.

Fig. 7 is a schematic view of the bolt and the complete unit body thread structure of the external thread including the similar olive-shaped asymmetric bidirectional tapered thread external thread of the similar olive-shaped two-way tapered thread structure forms such as the similar olive-shaped (left side taper is smaller than right side taper) and the similar olive-shaped (left side taper is larger than right side taper) on the single screw rod body of the fourth embodiment.

Fig. 8 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. 9 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. 10 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 nut body 22, a columnar parent body 3, a screw body 31, a tapered hole 4, a tapered hole conical surface 42, an internal thread 6, a truncated cone 7, a bidirectional truncated cone 71, a bidirectional truncated cone conical surface 72, a truncated cone first helical conical surface 721, a first taper angle α 1, a truncated cone second helical conical surface 722, a second taper angle α 2, an external spiral line 8, an external thread 9, a similar olive shape 93, a left-side taper 95, a right-side taper 96, a left-side distribution 97, a right-side distribution 98, a thread connection pair and/or thread pair 10, a play 101, a lock support surface 111, a lock support surface 112, a tapered thread support surface 122, a tapered thread support surface 121, a workpiece 130, a polish rod 20, a tapered axis 01, a thread axis 02, a slider a ramp body B on a ramp body, a gravity G along a ramp component G1, a, The friction force F, the thread lead angle phi, the equivalent friction angle P, the traditional external thread large diameter d, the traditional external thread small diameter d1 and the 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 and fig. 2, the present embodiment adopts a connection structure of an asymmetric bidirectional tapered external thread 9 and a conventional internal thread 6, and the bidirectional tapered external thread and conventional threaded connection pair 10 includes a bidirectional frustum 71 spirally distributed on the outer surface of the cylindrical parent body 3 and a special tapered hole 4 spirally distributed on the inner surface of the cylindrical parent body 2 formed by the conventional internal thread 6 contacting with the bidirectional tapered external thread 9, including the external screw thread 9 and the internal thread 6 of screw-thread fit each other, what the internal thread 6 distributes is that be spiral helicine special taper hole 4, what the external thread 9 distributes is that be spiral helicine two-way frustum 71, the internal thread 6 exists with being spiral helicine special taper hole 4 and with "non-entity space" form, the external thread 9 exists with being spiral helicine two-way frustum 71 and with "material entity" form, internal thread 6 and external thread 9 are the relation of containing piece and contained piece: the internal thread 6 and the external thread 9 are sleeved together in a one-section-by-one rotary mode until the internal thread is in interference fit, namely the traditional internal thread 6 is used for containing the bidirectional frustum body 71 in a one-section-by-one mode in the special conical hole 4 formed by contacting with the bidirectional conical external thread 9, namely the internal thread 6 is used for containing the external thread 9 in a one-section-by-one mode, the disordered freedom degree between the traditional internal thread 6 special conical hole 4 and the frustum body 7 is limited in a two-way mode, the spiral motion enables the bidirectional conical external thread and the traditional threaded connection pair 10 to obtain the necessary ordered freedom degree, and the technical characteristics of a conical pair and a threaded pair are effectively synthesized.

The bidirectional conical external thread and the traditional thread connection pair 10 in the embodiment are matched with the bidirectional conical frustum conical surface 72 and the special conical hole conical surface 42 of the special conical hole 4 of the traditional internal thread 6 when in use.

The asymmetric bidirectional tapered external thread in the embodiment and the conical frustum body 7 of the traditional threaded connection pair 10 reach a certain taper, that is, the cone reaches a certain taper angle, the threaded connection pair 10 has self-locking and self-positioning properties, the taper comprises a left taper 95 and a right taper 96, and the asymmetric bidirectional tapered thread 1 in the embodiment is that the left taper 95 is greater than the right taper 96. The left side taper 95 corresponds to a left side taper angle, namely a first taper angle alpha 1, preferably, the angle of 0 degrees is more than the first taper angle alpha 1 and less than 53 degrees, preferably, the value of the first taper angle alpha 1 ranges from 2 degrees to 40 degrees, and the special field is a special field, namely, the special field does not need to have self-locking property and/or self-positioning property and/or high axial bearing capacity, preferably, the angle of 53 degrees is more than or equal to the first taper angle alpha 1 and less than 180 degrees, preferably, the value of the first taper angle alpha 1 ranges from 53 degrees to 90 degrees; the right taper 96 corresponds to a right taper angle, namely a second taper angle alpha 2, preferably, the second taper angle alpha 2 is more than 0 degrees and less than 53 degrees, and preferably, the second taper angle alpha 2 is 2-40 degrees.

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 comprises a nut body 21 and a nut body 22, the inner surfaces of the nut body 21 and the nut body 22 are provided with traditional internal threads 6, the traditional internal threads 6 refer to other geometrical threads which can be screwed with the bidirectional conical threads 1 to form a threaded connection pair 10, when the traditional internal threads 6 are matched with the bidirectional conical external threads 9 to form the threaded connection pair 10, the traditional internal threads 6 are not traditional threads in the original sense but are conical threads 1 in a special form, the contact part of the conical threads 1 and the bidirectional conical external threads 9 forms a special conical hole 4 of the traditional internal threads 6 of the threaded connection pair 10, the special conical hole 4 is provided with a special conical hole surface 42, and the use times of screwing are increased, the effective conical surface area of the special conical hole conical surface 42 on the special conical hole 4 of the traditional internal thread 6 is continuously increased, namely the special conical hole conical surface 42 is continuously enlarged and tends to have larger contact surface direction change with the conical surface of the bidirectional conical external thread 9, the special conical hole 4 which has the technical spirit of the invention is formed substantially although the conical geometry is incomplete, the inner conical surface, namely the special conical hole conical surface 42 of the traditional internal thread 6 is firstly appeared in a line shape, the use frequency is increased along with the contact between the tooth tip of the traditional internal thread 6 and the conical frustum 7 of the bidirectional conical external thread 9, the inner conical surface is gradually increased, namely the special conical hole conical surface 42 of the traditional internal thread 6 is continuously changed and enlarged from line to plane, and the inner conical surface matched with the bidirectional conical external thread 9 can be directly processed at the tooth tip part of the traditional internal thread 6, which all accord with the technical spirit of the invention, the cylindrical parent body 2 comprises a cylindrical body and/or a non-cylindrical body and other workpieces and objects needing internal threads machined on the inner surface of the cylindrical body.

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 a bidirectional circular truncated cone body 71, and the columnar parent body 3 can be solid or hollow and comprises a cylinder, a cone, a pipe body and other workpieces and objects which need to be processed with external threads on the outer surface.

The olive-like 93 asymmetric bidirectional cone frustum 71 is characterized in that the olive-like 93 asymmetric bidirectional cone frustum is formed by symmetrically and oppositely combining the lower bottom surfaces of two cone frustum bodies with the same lower bottom surface and the same upper top surface but different cone heights, the upper top surfaces are arranged at two ends of the bidirectional cone frustum 71 and comprise a first spiral cone surface 721 of the cone frustum body, namely a left-side cone surface, and a second spiral cone surface 722 of the cone frustum body, namely a right-side cone surface, and an outer spiral line 8 when forming bidirectional tapered threads 1, respectively, and/or are respectively combined with the upper top surfaces of the adjacent bidirectional cone frustum bodies 71, the complete single-section asymmetric bidirectional tapered outer threads 9 are special bidirectional tapered geometric bodies which are large in the middle and small in two ends and have the left-side cone hole conicity larger than the right-side cone hole in a section passing through a thread axis 02 and have the olive-like 93 shape, the asymmetric bidirectional frustum 71 comprises a bidirectional frustum conical surface 72, an included angle between two element lines of a left-side conical surface, namely a first spiral conical surface 721 of the frustum conical body is a first cone angle alpha 1, the first spiral conical surface 721 of the frustum conical body forms a left-side taper 95 distributed in a left direction 97, the left-side taper 95 corresponds to the first cone angle alpha 1, an included angle between two element lines of a right-side conical surface, namely a second spiral conical surface 722 of the frustum conical body is a second cone angle alpha 2, the second spiral conical surface 722 of the frustum conical body forms a right-side taper 96 distributed in a right direction 98, the right-side taper 96 corresponds to the second cone angle alpha 2, the first cone angle alpha 1 and the second cone angle alpha 2 correspond to opposite taper directions, the element lines are intersecting lines of the conical surfaces and a plane passing through the axis 01 of the cone, and the shape 722 of the first spiral conical surface 721 of the frustum conical body and the second spiral conical surface of the bidirectional frustum conical body 71 is coincident with the central axis of the cylindrical body 3 The line has the right-angle sides of a right-angle trapezoid combination body which has the same lower bottom side and the same upper bottom side but different right-angle sides and is symmetrical about the lower bottom side and is jointed in opposite directions, the right-angle sides of the right-angle trapezoid combination body circumferentially rotate at a constant speed around a rotation center, the right-angle trapezoid combination body simultaneously axially moves along the central axis of the columnar matrix 3 at a constant speed, the spiral outer side surfaces of a revolution body formed by two inclined sides of the right-angle trapezoid combination body have the same shape, the right-angle trapezoid combination body is a special geometric body which has the same lower bottom side and the same upper bottom side but different right-angle sides, is symmetrical about the lower bottom.

In the connection structure of the asymmetric bidirectional tapered male screw 9 bolt and the conventional female screw 6, the nut body 21 and the nut body 22 are respectively positioned on the left side and the right side of the fastened workpiece 130, when the bolt and the double nut work, the connection with the fastened workpiece 130 is rigid, the rigid connection means that the nut end surface bearing surface and the workpiece 130 bearing surface are bearing surfaces, including the locking bearing surface 111 and the locking bearing surface 112, and the workpiece 130 means the connected object including the workpiece 130.

The thread work support surface of the present embodiment includes a tapered thread support surface 121 and a tapered thread support surface 122, when the left end surface of the fastened workpiece 130 and the right end surface of the nut body 21 are the nut body 21 and the locking support surface 111 of the fastened workpiece 130, the right helical conical surface of the cylindrical parent body 3, i.e., the bolt body 31, i.e., the bolt bi-directional tapered thread 1, is the tapered thread support surface 122, i.e., the conventional female thread 6 special tapered bore conical surface 42 and the tapered male thread 9 frustum second helical conical surface 722 are the tapered thread support surface 122 and the conventional female thread 6 special tapered bore conical surface 42 and the tapered frustum second helical conical surface 722 are support surfaces for each other, when the right end surface of the fastened workpiece 130 and the left end surface of the nut body 22 are the locking support surfaces 112 of the nut body 22 and the fastened workpiece 130, the left helical conical surface of the cylindrical parent body 3, i.e., the bolt body 31, i, namely, the conventional internal thread 6 special tapered bore conical surface 42 and the tapered external thread 9 frustum first helical conical surface 721 are tapered thread bearing surfaces 121, and the conventional internal thread 6 special tapered bore conical surface 42 and the frustum first helical conical surface 721 are bearing surfaces.

The bidirectional conical external thread is in transmission connection with a traditional thread, the bidirectional bearing is realized by screwing the special conical hole 4 of the traditional internal thread 6 and the bidirectional conical frustum body 71, a clearance 101 must be formed between the bidirectional conical frustum body 71 and the special conical hole 4 of the traditional internal thread 6, the clearance 101 is favorable for bearing oil film formation, the threaded connection pair 10 is equivalent to a sliding bearing pair consisting of one or more sliding bearings, namely, each section of the traditional internal thread 6 bidirectionally contains a corresponding section of the bidirectional conical external thread 9 to form a pair of sliding bearings, the number of the sliding bearings is adjusted according to application conditions, namely, the traditional internal thread 6 is effectively and bidirectionally jointed with the bidirectional conical external thread 9, namely, the contained and contained thread joints are effectively and bidirectionally contacted and clasped, and the bidirectional conical frustum body 7 is designed according to the application conditions and is radially contained through the special conical hole 4, The axial, angular, circumferential and other multi-direction positioning ensures the precision, efficiency and reliability of the transmission connection of the tapered thread technology, especially the bidirectional tapered external thread and the traditional thread.

The technical performance of the bidirectional conical external thread and the traditional thread is realized by screwing and connecting the traditional internal thread 6 special taper hole 4 and the bidirectional conical frustum body 71 when in fastening connection and sealing connection, namely the sizing of the first spiral conical surface 721 of the conical frustum body and the traditional internal thread 6 special taper hole 4 special taper hole conical surface 42 is realized until interference and/or the sizing of the second spiral conical surface 722 of the conical frustum body and the traditional internal thread 6 special taper hole 4 special taper hole conical surface 42 is realized until interference, according to the application working condition, one-direction bearing and/or two-direction simultaneous bearing are achieved, namely the bidirectional conical external thread 9 bidirectional conical frustum body 71 and the traditional internal thread 6 special taper hole 4 are guided by a spiral line, the inner cone and the outer cone inner and outer diameter are centered until the traditional internal thread 6 special taper hole 4 special taper hole conical surface 42 and the conical frustum body first spiral conical surface 721 are clasped until contact and/or the traditional internal thread 6 special taper hole conical surface 4 and the traditional internal cone conical surface 42 are clasped The special conical hole conical surface 42 of the special conical hole 4 with the lines 6 and the second spiral conical surface 722 of the cone frustum body are clasped until interference contact is achieved, and therefore the technical performances of connection, locking, looseness prevention, bearing, fatigue, sealing and the like of a mechanical mechanism are achieved.

Therefore, the technical performances of the bidirectional tapered external thread and the traditional mechanical mechanism of the threaded connection pair 10 in the embodiment, such as transmission precision, 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 size of the first helical conical surface 721 of the frustum cone and the left taper 95 formed by the first conical surface, i.e., the corresponding first taper angle α 1, the second helical conical surface 722 of the frustum cone and the right taper 96 formed by the second conical surface 96, i.e., the corresponding second taper angle α 2, and also related to the size of the special conical surface 42 of the special conical hole 4 of the traditional internal thread 6, which is formed by contacting with the bidirectional tapered external thread 9, and the taper of the traditional internal. The material friction coefficient, the processing quality and the application working condition of the columnar matrix 3 and the cylindrical matrix 2 also have certain influence on the conical matching.

According to the bidirectional tapered external thread and the traditional thread, 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. This configuration ensures that the frustum-conical body first helical conical surface 721 and the frustum-conical body second helical conical surface 722 have sufficient length to ensure that the bidirectional frustum-conical body conical surface 72 has sufficient effective contact area and strength and efficiency required for the screw motion when cooperating with the conventional internal thread 6 special taper hole 4 special taper hole conical surface 42.

According to the bidirectional tapered external thread and the traditional thread, 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. This structure ensures that the frustum-conical body first helical conical surface 721 and the frustum-conical body second helical conical surface 722 have sufficient lengths to ensure that the bidirectional frustum-conical body conical surface 72 has sufficient effective contact area and strength and efficiency required for the screw motion when cooperating with the conventional internal thread 6 special taper hole 4 special taper hole conical surface 42.

In the bidirectional tapered external thread and the conventional thread, the first spiral conical surface 721 of the truncated cone body and the second spiral conical surface 722 of the truncated cone body are both continuous helical surfaces or non-continuous helical surfaces.

In the bidirectional conical external thread and the traditional thread, one end and/or two ends of the columnar parent body 3 can be screwed into the screwing end of the connecting hole of the cylindrical parent body 2, and the connecting hole is a threaded hole arranged on the nut body 21. One end of the columnar parent body 3 is provided with a head part with the size larger than the outer diameter of the columnar parent body 3 and/or one end and/or two ends of the columnar parent body 3 are/is provided with a head part with the diameter smaller than the outer thread 9 of the screw rod body 31 of the columnar parent body 3, namely the columnar parent body 3 and the head part are connected into a bolt, and the bolt without the head part and/or the head parts at the two ends smaller than the diameter of the outer thread 9 and/or the bolt without the screw thread at the middle part and with the outer threads 9 at the. Compared with the prior art, the bidirectional conical external thread and the traditional thread connection pair 10 have 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. 3, the structure, principle and implementation steps of the present embodiment are similar to those of the embodiment except that, the double nuts are different in the positional relationship with the fastened workpiece 130, the double nuts comprise nut bodies 21 and 22, the bolt bodies are provided with hexagonal heads larger than the bolt body 31, when the hexagonal head of the bolt is positioned at the left side, the nut body 21 and the nut body 22 are both positioned at the right side of the workpiece 130 to be fastened, and the bolt and the double nuts work, the relationship between the nut body 21, the nut body 22 and the fastened workpiece 130 is a non-rigid connection, the non-rigid connection means that the end surfaces of the opposite side surfaces of the nut body 21 and the nut body 22 which are two nuts are mutually supporting surfaces, the bearing surfaces comprise a locking bearing surface 111 and a locking bearing surface 112, and are mainly applied to the application fields of non-rigid connecting workpieces 130 such as non-rigid materials or transmission parts, and the like, or the application fields of meeting requirements through double nut installation, and the like. The workpiece 130 refers to a connected object including the workpiece 130.

The thread working support surface of the present embodiment includes a tapered thread support surface 121 and a tapered thread support surface 122, and includes a nut body 21 and a nut body 22, the right end surface of the nut body 21, i.e. the locking support surface 111, and the left end surface of the nut body 22, i.e. the locking support surface 112, are in direct contact with each other and are locking support surfaces with each other, when the right end surface of the nut body 21 is the locking support surface 111, the right helical conical surface of the cylindrical parent body 3, i.e. the bolt body 31, i.e. the bolt bidirectional tapered thread 1, is the tapered thread support surface 122, i.e. the conventional internal thread 6 special tapered bore conical surface 42 and the tapered external thread 9 frustum second helical conical surface 722 are tapered thread support surfaces 122 and the conventional internal thread 6 special tapered bore conical surface 42 and the frustum second helical conical surface 722 are support surfaces with each other, when the left end surface of the nut body 22 is the locking support surface 112, the cylindrical parent body 3, i.e. the bolt body, namely, the conventional internal thread 6 special tapered bore conical surface 42 and the tapered external thread 9 frustum first helical conical surface 721 are tapered thread bearing surfaces 121, and the conventional internal thread 6 special tapered bore conical surface 42 and the frustum first helical conical surface 721 are bearing surfaces.

In this embodiment, when the cylindrical parent body 2 located at the inner side, i.e., the nut body 21 adjacent to the fastened workpiece 130, has been effectively combined with the cylindrical parent body 3, i.e., the bolt body 31, i.e., the bolt, i.e., the internal thread 6 and the external thread 9 constituting the tapered threaded connection pair 10, effectively clasped together, the cylindrical parent body 2 located at the outer side, i.e., the nut body 22 not adjacent to the fastened workpiece 130, may be kept in the original shape and/or removed according to the application requirements and only one nut is left (for example, when the equipment requires light weight or does not require two nuts to ensure the application fields such as connection technical reliability, etc.), the removed nut body 22 is not used as a connection nut but used as an installation process nut, and the installation process nut internal thread may be manufactured by using not only a conventional thread, but also a nut body 22 manufactured by using a bidirectional, the threaded connection pair 10 is a closed-loop fastening technology system, namely the threaded connection pair 10 is an independent technology system after the internal thread 6 and the external thread 9 of the threaded connection pair 10 are effectively locked together, and the technical effectiveness of the connection technology system is ensured without depending on the technical compensation of the third person, namely the effectiveness of the threaded connection pair 10 is not influenced even if no other objects are supported, including a gap between the threaded connection pair 10 and the fastened workpiece 130, the method is favorable for greatly reducing the weight of the equipment, removing ineffective load, improving the technical requirements of the equipment on effective load capacity, braking performance, energy conservation, emission reduction and the like, this is a thread technical advantage which is unique to the thread connection pair 10 of the connection structure of the bidirectional tapered external thread and the conventional thread and the fastened workpiece 130 in relation to non-rigid connection or rigid connection, but which is not possessed by other thread techniques. In the present embodiment, when the hexagonal head of the bolt is located at the right side, the nut body 21 and the nut body 22 are both located at the left side of the workpiece 130 to be fastened, and the structure, principle and implementation steps are similar to those of the present embodiment.

EXAMPLE III

As shown in fig. 4 and 5, the structure, principle and implementation steps of the present embodiment are similar to those of the present embodiment, except that the asymmetric bidirectional tapered thread 1 in the present embodiment has a left-side taper 95 smaller than a right-side taper 96, preferably 0 ° < a first taper angle α 1 < 53 °, and preferably the first taper angle α 1 takes a value of 2 ° to 40 °; 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.

Example four

As shown in fig. 6 and 7, the structure, principle and implementation steps of this embodiment are similar to those of the first and third embodiments, except that the screw body 31 of the cylindrical parent body 3 in this embodiment includes two types of thread structures of the olive-like 93 asymmetric bidirectional tapered threads 1, that is, the asymmetric bidirectional tapered threads 1 of the screw body 31 are the olive-like 93 asymmetric bidirectional tapered external threads 9 having two types of taper structures, that is, the left-side taper 95 is smaller than the right-side taper 96 and the left-side taper 95 is larger than the right-side taper 96, the thread section of the screw body 31 on the left side of the polish rod 20, that is, the unthreaded section is the olive-like 93 asymmetric bidirectional tapered external threads 9, that is, the thread section of the external threads 9 that are in threaded engagement with the cylindrical parent body 2, that is, on the left side of the workpiece 130, that is, the nut body 21 is the, the thread section of the screw body 31 on the right side of the polish rod 20, i.e. the unthreaded section, is an asymmetric bidirectional tapered external thread 9 with a left-side taper 95 smaller than a right-side taper 96 in a olive-like shape 93, i.e. the thread section where the external thread 9 is in threaded fit with the cylindrical parent body 2, i.e. the nut body 22, on the right side of the workpiece 130 is the asymmetric bidirectional tapered external thread 9 in the olive-like shape 93, and the left-side taper 95 is smaller.

In the present embodiment, the asymmetric bidirectional tapered external thread 9 having the left-side taper 95 smaller than the right-side taper 96 of the olive-like shape 93 on the left side and the asymmetric bidirectional tapered external thread 9 having the left-side taper 95 larger than the right-side taper 96 on the right side of the polished rod 20 of the screw body 31, which is the threaded section on the right side of the unthreaded section, of the polished rod 20 including the screw body 31 of the cylindrical parent body 3 described above may also be adopted, and the structure, principle and implementation steps thereof are similar to those of the present embodiment.

The screw body 31 adopts a mixed structure form of the olive-like 93 asymmetric bidirectional tapered external threads 9, which depends on the application requirements.

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, nut body 22, cylindrical parent body 3, screw body 31, polish rod 20, tapered bore 4, tapered bore conical surface 42, conventional internal thread 6, frustum cone 7, bidirectional frustum cone 71, bidirectional frustum cone conical 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 spiral line 8, bidirectional tapered external thread 9, olivoid 93, left taper 95, right taper 96, left distribution 97, right distribution 98, thread connection and/or thread pair 10, cone 101, self-locking, self-positioning, pressure, cone axis 01, thread axis 02, mirror image, bushing, shaft, single cone, double cone, internal clearance, tapered bore, external taper, tapered bore, external taper, internal clearance, and/or threaded clearance, Cones, conical pairs, helical structures, helical motions, threaded bodies, complete unit body threads, axil forces, axil force angles, anti-axil forces, anti-axil force angles, centripetal forces, counter-collinear, internal stresses, bi-directional forces, unidirectional forces, sliding bearings, sliding bearing pairs, locking bearing surfaces 111, locking bearing surfaces 112, tapered thread bearing surfaces 122, tapered thread bearing surfaces 121, non-solid spaces, material solids, work pieces 130, nut body locking directions, non-rigid connections, non-rigid materials, transmission members, spacers, and the like, but do not exclude the possibility of using other terms, which terms are used merely to more conveniently describe and explain the nature of the invention, and they are to be construed as being against the spirit of the invention in any additional way.

Claims (10)

1. The utility model provides an asymmetric two-way toper screw thread external screw thread of kind olive form and traditional thread connection structure, including internal thread (6) and external screw thread (9) of screw-thread fit each other, characterized by, its complete unit body screw thread of external screw thread (9) be one kind be the asymmetric two-way frustum body (71) of kind olive form that big both ends are little and left side tapering (95) and right side tapering (96) are different in the middle of the heliciform, two kinds of tapering structural style including left side tapering (95) are greater than right side tapering (96) and left side tapering (95) are less than right side tapering (96), external screw thread (9) the screw thread body be the two-way frustum body (71) of heliciform in column parent (3) outward appearance, internal thread (6) the screw thread body be that traditional screw thread tooth body and external screw thread (9) contact of tube-shape parent (2) internal surface formed and be, the left side conical surface of the external thread (9) forms a left side conical surface (95) corresponding to a first conical angle (alpha 1), the right side conical surface forms a right side conical surface (96) corresponding to a second conical angle (alpha 2), the left side conical surface (95) and the right side conical surface (96) are opposite in direction and different in conical degree, the internal thread (6) and the external thread (9) contain the conical body through the conical hole until the internal conical surface and the external conical surface are mutually loaded, and the left side conical degree (95) is greater than the right side conical degree (96), wherein the first conical angle (alpha 1) is greater than 0 degrees and less than 53 degrees, the second conical angle (alpha 2) is greater than 0 degrees and less than 53 degrees, or the first conical angle (alpha; the left side taper (95) is less than the right side taper (96), wherein 0 DEG < the first taper angle (alpha 1) < 53 DEG, 0 DEG < the second taper angle (alpha 2) < 53 DEG, or 53 DEG < the second taper angle (alpha 2) < 180 deg.

2. The olive-like asymmetric bidirectional tapered external thread connection according to claim 1 with a conventional thread, it is characterized in that the external thread (9) comprises a left side conical surface (namely a first spiral conical surface (721) of the conical frustum), a right side conical surface (namely a second spiral conical surface (722) of the conical frustum and an external spiral line (8) of the bidirectional conical frustum conical surface (72), the shape of the right-angle trapezoid is symmetrical with the lower bottom edges of two right-angle trapezoids which are superposed on the central axis of the columnar parent body (3) and have the same lower bottom edges and the same upper bottom edges but different right-angle edges, the right-angle edges of the right-angle trapezoid are oppositely jointed to form a right-angle trapezoid combination body, the right-angle edges are taken as a rotation center, the rotation is carried out at a uniform speed in the circumferential direction, the right-angle trapezoid combination body simultaneously moves axially along the, 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 connection structure of the olive-like asymmetric bidirectional tapered external thread and the traditional thread is characterized in that the axial movement distance of the right-angled trapezoidal combination body when the right-angled trapezoidal combination body rotates at a constant speed for one circle is at least one time of the sum length of the right-angled sides of the two right-angled trapezoidal combination bodies.

4. The connection structure of the olive-like asymmetric bidirectional tapered external thread and the traditional thread as claimed in claim 2, wherein the axial movement distance 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 circle.

5. The external thread connection structure of the olive-like asymmetric bidirectional tapered thread as claimed in claim 1 or 2, wherein the left and right conical surfaces of the external thread (9), i.e. the first helical conical surface (721) of the frustum cone, the second helical conical surface (722) of the frustum cone and the external spiral line (8), are continuous helical surfaces or non-continuous helical surfaces; the conical hole (4) is provided with a conical hole conical surface (42), and the conical hole conical surface (42) is a continuous spiral surface or a non-continuous spiral surface.

6. The olive-like asymmetric bidirectional tapered external thread and conventional thread connection structure as claimed in claim 1, wherein said external thread (9) is a olive-like (93) asymmetric bidirectional tapered external thread (9) and said internal thread (6) is a conventional threaded internal thread.

7. The external thread of olive-like asymmetric bidirectional tapered thread as claimed in claim 1 or 6, wherein the conventional thread includes any one of triangular thread, trapezoidal thread, zigzag thread, rectangular thread, and circular arc thread, including conventional thread whose thread body, i.e. tooth body, is deformed.

8. The olive-like asymmetric bidirectional tapered external thread connection according to claim 1 with a conventional thread, it is characterized in that the external thread (9) has the capability of assimilating the internal thread (6), the internal thread (6) after assimilation is a dissimilatory traditional thread, namely the thread body is a conical thread (1), the internal thread (6) and the external thread (9) form a thread connection pair (10), the thread connection pair (10) is formed by mutually matching a spiral bidirectional cone frustum body (71) and a spiral conical hole (4), and the conical surface (42) of the tapered hole, the first spiral conical surface (721) of the truncated cone body and the second spiral conical surface (722) of the truncated cone body are loaded by taking a contact surface as a bearing surface, and/or the inner diameter and the outer diameter of the inner cone and the outer cone are centered under the guidance of the spiral line until the conical surface (72) of the bidirectional truncated cone body is in self-positioning contact with the conical surface (42) of the conical hole and/or self-locking is generated.

9. The olive-like asymmetric bidirectional tapered external thread connection structure as claimed in claim 1, wherein said cylindrical parent body (3) is solid or hollow, and includes a cylindrical body and/or a non-cylindrical body, and workpieces and objects requiring the bidirectional tapered external thread (9) to be formed on the outer surface thereof, said outer surface includes a cylindrical surface and/or a tapered surface and/or a non-cylindrical surface geometry, said external thread (9) is provided on the shank (31) of said cylindrical parent body (3), when a cylindrical parent body (2) has been effectively combined with the cylindrical parent body (3), i.e. the internal thread (6) and the external thread (9) constituting the threaded connection pair (10) are effectively locked together, and the other cylindrical parent body can be removed and/or retained.

10. The olive-like asymmetric bi-directional tapered thread external thread connection according to claim 1, wherein said external thread (9) comprises a single-thread body with an incomplete tapered geometry, i.e. a single-thread body with an incomplete single-thread body.

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