CN213744398U - Dumbbell-like asymmetric bidirectional tapered thread internal 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 taper thread internal thread of dumbbell shape 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, internal thread (6) are that tube-shape parent (2) internal surface is heliciform and complete cell body screw thread is that left side tapering (95) are greater than and/or are less than right side tapering (96) type dumbbell shape (94) two-way bell mouth (41) (non-entity space), traditional external screw thread (9) of assimilation has, it is that column parent (3) outward surface personally submits heliciform special cone (7) to be assimilated external screw thread (9), the performance mainly depends on thread body conical surface and tapering size, the advantage is: the inner and outer threads are contained in the cone through the taper hole, a section of cone pair is formed by the bidirectional taper hole (41) and the special cone body (7) 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

Dumbbell-like asymmetric bidirectional tapered thread internal 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 internal thread of kind dumbbell shape and traditional threaded connection structure (hereinafter referred to as "two-way toper internal 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, is not a specific product, is a key common technology of the industry, and the technical performance of the thread needs to be embodied by using the specific product as an application carrier, so that the thread is widely applied in various industries. The existing thread technology has high standardization level, mature technical theory and long-term practical application, and is a fastening thread when used for fastening; the sealing is a sealing thread; the transmission screw is formed by transmission. Thread terminology according to national standards: "thread" means a tooth body with the same tooth type and continuously raised along a spiral line on a cylindrical or conical surface; "dental body" refers to the body of material between adjacent flanks. This is also a globally recognized definition of threads.

Modern threads began in 1841 as uk hui threads. According to the modern thread technical theory, the basic conditions of thread self-locking are as follows: the equivalent friction angle must not be less than the helix angle. The thread is a recognition of the modern thread technology based on the technical principle of the modern thread, namely the inclined plane principle, and becomes an important theoretical basis of the modern thread technology. The first theoretical explanation of the slope principle was steve, who studied the parallelogram law of the equilibrium of the object on the slope and the resultant of forces, he proposed the famous slope law in 1586: the gravity force in the direction of the inclined plane on an object placed on the inclined plane is proportional to the sine of the inclination angle. The inclined plane is a smooth plane inclined with the horizontal plane, the screw is the deformation of the inclined plane, the thread is like the inclined plane wrapped outside the cylinder, the more gentle the inclined plane is, the greater the mechanical benefit is (see fig. 9) (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 10) 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. 11), 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, to connecting the more non-static more non-room temperature environment of destruction of having the non-pure linear load, there is the non-linear load of linear load and even the two stack and produce more complicated destruction load condition from this, and the application operating mode is complicated, based on understanding like this, the utility model aims at the above-mentioned problem, provide a connection structure of two-way toper internal 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 internal thread and the traditional thread is a thread connecting pair consisting of an asymmetric bidirectional conical thread internal thread and a traditional thread external thread, is a special thread pair technology combining the technical characteristics of a conical pair and a screw motion, the bidirectional conical thread internal thread is a thread technology which combines technical characteristics of a bidirectional conical body and a spiral structure, the bidirectional conical body consists of two single conical bodies, the two-way taper is formed by two single taper bodies with opposite left side taper and right side taper and different taper, the two-way taper bodies are spirally distributed on the inner surface of the cylindrical parent body to form internal threads, the complete unit body thread is a spiral asymmetric special bidirectional tapered geometric body which has a small middle part and two large ends and is in a dumbbell-like shape, wherein the left side taper is larger than the right side taper and/or the left side taper is smaller than the right side taper.

This two-way toper internal thread and traditional screw thread, the asymmetric two-way toper internal thread of class dumbbell shape 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 be expressed as: the dumbbell-like special bidirectional tapered geometric body which is provided with the left-side tapered hole and the right-side tapered hole, has the left-side tapered hole and the right-side tapered hole which are opposite in direction and different in taper, is distributed continuously and/or discontinuously along a spiral line, is small in spiral middle and large in two ends is arranged on the inner 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 internal thread and traditional screw thread, including being the spiral distribution in the two-way bell mouth of tube-shape parent internal surface, including screw-thread fit's external screw thread and internal thread each other promptly, the internal thread exists in order to be the two-way bell mouth of spiral and with "non-entity space" form, external screw thread in order to be the special cone of spiral and exist with "material entity" form, non-entity space refer to the space environment that can hold above-mentioned material entity, the internal thread is the container, the external screw thread is by the container: the bidirectional conical internal thread is a special conical body formed by contacting the bidirectional conical internal thread, namely the conventional external thread of the bidirectional conical hole one section by one section, the internal thread and the external thread are sleeved one section by one section in a rotating mode to be embraced until one side bidirectional bearing or the left side and the right side are simultaneously bidirectionally borne or until sizing interference fit, whether two sides are simultaneously bidirectionally borne or not is related to the practical application working condition, namely the bidirectional conical hole one section by one section is enveloped and embraced with the special conical body, namely the internal thread is a corresponding external thread embraced one section by one section.

The thread connection pair is a thread pair formed by a cone pair formed by mutually matching a spiral outer conical surface and a spiral inner conical surface, a section of cone pair formed by mutually matching a spiral conical hole and a spiral cone frustum body, the inner conical surface of the inner cone of the bidirectional conical thread is a bidirectional conical surface, when the bidirectional conical inner thread and the traditional thread form the thread connection pair, the junction surface of the inner conical surface of the bidirectional conical inner thread and the special conical surface of the traditional outer thread is used as a bearing surface, namely the conical surface is used as the bearing surface, the connection technical performance is realized, 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 inner conical surface of the connection structure of the bidirectional conical inner thread and the traditional thread, the size of the conicity of the inner conical surface, the conicity of the conical surface of the inner conical surface, the special outer conical surface and the conicity formed by the contact of the traditional thread outer thread and the bidirectional conical inner 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 internal thread and the traditional screw thread are different, the internal thread body, namely the bidirectional conical body, is distributed on any one side of the left side or the right side, and the section of the single conical body is formed by two plain lines of a cone body in a bidirectional way, namely, the plain line is the intersection line of the conical surface and the plane passing through the conical axis, the cone principle of the connection structure of the inward conical internal thread and the traditional screw thread shows the axial force and the 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, the formed thread pair is formed by that the internal thread embraces the external thread, namely, a cone body (internal thread) embraces the corresponding one-section cone body (external thread) until embracing and sizing matching 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 radial locking of the taper hole and the special cone, so that the self-locking or self-positioning of the 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 the 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 common point of the thread axis and/or approximate common point through the thread axis cross section, the axial force is densely and numb distributed on the conical axis and/or the thread axis in an axial and circumferential mode, the axial force is corresponding to an axial force angle, an included angle of two centripetal forces forming the axial force forms the axial force angle, and the size of the axial force angle depends on the taper size of the cone, namely the size of the taper angle.

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

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

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 completely do not have the self-positioning capability.

Compared with the contained and contained relation that the single-cone unidirectional tapered thread of the single cone can only bear the load of the single side of the conical surface, the contained relation of the irreversible single-side bidirectional contained relation is realized, the reversible left and right bidirectional contained relation of the bidirectional tapered thread of the double cone can realize the respective bearing of the left side of the conical surface and/or the right side of the conical surface and/or the bidirectional simultaneous bearing of the right side of the left side of the conical surface, the disordered freedom degree between the conical hole and the special outer cone is further limited, the spiral motion enables the bidirectional tapered internal thread and the traditional threaded connection structure to obtain the necessary ordered freedom degree, and the technical characteristics of the conical pair and the threaded pair are effectively synthesized to form a brand new thread technology.

The connecting structure of the bidirectional conical internal thread and the traditional thread is characterized in that the special conical surface of the special conical body of the traditional external thread is matched with the conical surface of the bidirectional conical hole of the bidirectional conical internal thread when in use.

The bidirectional conical internal thread and the traditional thread, the bidirectional conical internal thread, namely the conical hole, can realize self-locking and/or self-positioning of the threaded connection pair without any taper or any taper angle, the inner cone body must reach a certain taper or a certain taper angle, the bidirectional conical internal thread and the traditional threaded connection structure have self-locking and self-positioning properties, the taper comprises a left taper and a right taper, the left taper corresponds to a left taper angle, namely a first taper angle alpha 1, the right taper corresponds to a right 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 internal 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 conical holes which are distributed spirally, the conical holes comprise bidirectional conical 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 a cylindrical surface and/or a non-cylindrical surface including a conical surface.

The two-way conical internal thread and the traditional thread are characterized in that the thread is formed by two conical holes with the same lower bottom surface and the same upper top surface but different cone heights, wherein the upper top surfaces of the two conical holes are symmetrical and are mutually jointed in a spiral way oppositely, the lower bottom surfaces of the two conical holes are positioned at two ends of the two-way conical hole, and the dumbbell-like asymmetrical two-way conical thread is formed by mutually jointing the upper bottom surfaces of the two conical holes with each other and/or the lower bottom surfaces of the two conical holes with each other respectively to form a spiral thread, the internal thread comprises a first spiral conical surface of the conical hole, namely a left-side conical surface, and a second spiral conical surface of the conical hole, namely a right-side conical surface and an internal spiral line, in a section passing through the axis of the thread, the complete single-section asymmetrical two-way conical internal thread is a special dumbbell-like two-way conical geometric body with a small middle part and big two ends, the asymmetric bidirectional tapered hole comprises a bidirectional tapered hole conical surface, wherein an included angle formed by two plain lines of a left conical surface, namely a first spiral conical surface of the tapered hole, is a first taper angle alpha 1, the first spiral conical surface of the tapered hole forms a left taper and is distributed in the right direction, the left taper corresponds to the first taper angle alpha 1, an included angle formed by two plain lines of a right conical surface, namely a second spiral conical surface of the tapered hole, is a second taper angle alpha 2, the second spiral conical surface of the tapered hole forms a right taper and is distributed in the left direction, the right taper corresponds to the second taper angle alpha 2, the taper directions corresponding to the first taper angle alpha 1 and the second taper angle alpha 2 are opposite, the plain lines are intersection lines of the conical surface and a plane passing through a conical axis, and the shape formed by the first spiral conical surface of the tapered hole and the second spiral conical surface of the tapered hole of the bidirectional tapered hole is coincident with two cone angles which have the same lower base line and the same upper base line but different right-angle sides and are coincident with the tubular parent body The right-angle trapezoidal combination body is a special geometric body which has two right-angle trapezoidal upper bases which are the same and the same as the lower bases but different from the right-angle sides, is symmetrical and oppositely jointed, and the lower bases are respectively positioned at two ends of the right-angle trapezoidal combination body.

The bidirectional tapered internal thread has the unique technical characteristics and advantages that the thread body is a tapered body, namely a tapered hole, and has strong capability of assimilating different threads, namely the capability of assimilating the traditional thread matched with the bidirectional tapered internal thread into the tapered thread with the special form and 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, which looks like that the shape of the thread body is not greatly different from the shape of the traditional thread tooth body, but does not have the substantial technical content of the thread body of the traditional thread, 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 trapezoidal thread, a tapered hole and a tapered hole, The zigzag thread, the rectangular thread, the circular arc thread and the like can be screwed with the bidirectional tapered thread to form other geometrical threads of the threaded connection pair, but are not limited to the above threads, and the conventional threads are applicable to the conventional threads including the conventional threads, and include the conventional threads of which thread bodies, namely tooth bodies, are subjected to deformation treatment.

When the traditional external thread and the bidirectional conical internal thread are matched to form a threaded connection pair, the traditional external thread is not the traditional thread in the original meaning but is a conical thread in a special form assimilated by the conical thread, the contact part of the traditional external thread and the bidirectional conical internal thread forms the outer surface of a special conical body of the traditional external thread of the threaded connection pair, which can be matched with the spiral conical surface of the conical thread, namely the special conical body is provided with a special conical surface, the effective conical surface area of the special conical surface on the special conical body of the traditional external thread is continuously increased along with the increase of the number of screwing use, namely the special conical surface is continuously increased and tends to have larger contact surface direction change with the conical surface of the conical hole of the bidirectional conical internal thread, and the special conical body which has incomplete conical geometric shape and has the technical spirit of the invention is formed substantially, furthermore, the special cone is a thread formed by the cohesion contact of the traditional external thread edge and the bidirectional conical internal thread and is a special cone geometry transformed from the traditional external thread tooth, the special cone has a special cone surface which is matched with the cone surface of the bidirectional conical hole in the radial direction, namely, the thread connection pair is formed by mutually matching a special cone surface of the spiral special cone which is formed by the cohesion contact of the traditional external thread edge and the bidirectional conical internal thread and an inner cone surface of the spiral inner cone which is the bidirectional conical internal thread to form a cone pair, the inner cone surface which is the inner cone is a bidirectional cone surface, the spiral cone surface of the bidirectional conical internal thread conical hole is a bidirectional cone surface, the traditional thread after being assimilated is a dissimilarly traditional thread which is a special type conical thread, the external conical surface of the special tapered thread, namely the special conical surface of the traditional external thread, appears in a linear form, and gradually increases along with the increase of the contact use times of the traditional external thread cusp and the tapered hole of the bidirectional tapered internal thread, namely the special conical surface of the traditional external thread continuously changes from a microscopic surface (macroscopically, a line) to a macroscopic surface, and the external conical surface matched with the bidirectional tapered internal thread can be directly processed at the cusp part of the traditional external thread, which all accord with the technical spirit of the invention.

The bidirectional conical internal thread and the traditional thread are characterized in that the columnar matrix is provided with a screw rod body, the outer surface of the screw rod body is provided with special conical bodies which are spirally distributed, the special conical bodies are special conical bodies formed by contacting the traditional external thread with the bidirectional conical internal thread, the special conical bodies are provided with special conical surfaces, 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 comprises outer surface geometrical shapes such as non-cylindrical surfaces such as cylindrical surfaces and conical surfaces. When the connecting structure of the bidirectional conical internal 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 internal thread and the traditional thread adopt a connecting structure of a traditional thread bolt and a bidirectional conical thread double nut, when the relation between the traditional thread bolt and a fastened workpiece is rigid connection, the conical thread bearing surfaces are different, when a 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 a left side nut body is positioned on the locking bearing surface of the fastened workpiece, the left side spiral conical surface of the bidirectional conical thread of the left side nut body is a conical thread bearing surface, namely a first spiral conical surface of a bidirectional conical internal thread conical hole and a special conical surface of a traditional external thread are conical thread bearing surfaces, and the first spiral conical surface of the conical hole and the special conical surface of the traditional external thread 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, and the left side end surface of the cylindrical parent body, namely a right side nut body is positioned on the locking bearing surface of the right side nut body and the fastened workpiece, the right spiral conical surface of the bidirectional conical thread of the right nut body is a conical thread bearing surface, namely, the second spiral conical surface of the bidirectional conical internal thread conical hole and the traditional external thread special conical surface are conical thread bearing surfaces, and the second spiral conical surface of the conical hole and the traditional external thread special conical surface are bearing surfaces.

The bidirectional conical internal thread and the traditional thread adopt a connecting structure of a traditional thread bolt and a bidirectional conical thread single nut, and when the connection 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 connecting 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 right spiral conical surface of the bidirectional conical thread of the nut body is a conical thread supporting surface, namely, the second spiral conical surface of the bidirectional conical internal thread conical hole and the special conical surface of the traditional external thread are conical thread supporting surfaces, and the second spiral conical surface of the conical hole and the special conical surface of the traditional external thread are supporting surfaces; 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 a 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 left spiral conical face of the bidirectional conical thread of the nut body is a conical thread supporting face, namely the first spiral conical face of the bidirectional conical internal thread conical hole and the traditional external thread special conical face are conical thread supporting faces, and the first spiral conical face of the conical hole and the traditional external thread special conical face are supporting faces mutually.

The bidirectional conical internal thread and the traditional thread are in a connection structure of a traditional threaded bolt and a bidirectional conical thread double nut, and are 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 an opposite direction and is a locking bearing surface, when the right end surface of the left nut body is the locking bearing surface, the left spiral conical surface of the bidirectional conical thread of the left nut body is the conical thread bearing surface, namely, the first spiral conical surface of the bidirectional conical internal thread conical hole and the special conical surface of the traditional external thread are conical thread bearing surfaces, and the first spiral conical surface of the conical hole and the special conical surface of the traditional external thread are bearing surfaces, namely, the second spiral conical surface of the bidirectional conical inner thread conical hole and the traditional outer thread special conical surface are conical thread bearing surfaces, and the second spiral conical surface of the conical hole and the traditional outer thread special conical surface are bearing surfaces.

The bidirectional conical internal thread and the traditional thread are in a connection structure of the traditional thread bolt and the bidirectional conical thread double nut, 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, 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, so that 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, the left spiral conical surface of the bidirectional conical thread of the left nut body is a conical thread bearing surface, namely a first spiral conical surface of a bidirectional conical internal thread conical hole and a special conical surface of the traditional external thread are conical thread bearing surfaces, and the first spiral conical surface of the bidirectional conical hole and the special conical surface of the traditional external thread are mutually connected with the special conical surface of the traditional external thread 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 the locking bearing surface of the right nut body, the right spiral conical surface of the bidirectional conical thread of the right nut body is a conical thread bearing surface, namely the second spiral conical surface of the bidirectional conical inner thread conical hole and the traditional special conical surface of the external thread are conical thread bearing surfaces, and the second spiral conical surface of the conical hole and the traditional special conical surface of the external thread are 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 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, application fields such as light weight of equipment or reliability of connection technology without double nuts), the disassembled nut body is not used as a connection nut but used as an installation process nut, the internal thread of the installation process nut is not manufactured by adopting bidirectional tapered threads, and can also be manufactured by adopting unidirectional tapered threads and other threads capable of being screwed with the bolt threads, namely triangular threads, threaded nuts, threaded connection nuts, and the like, The nut body is suitable for all traditional threads such as trapezoidal threads, saw-tooth threads and the like, and the reliability of the connection technology is ensured, the threaded connection pair is a closed-loop fastening technology system, namely after the internal threads and the external threads of the threaded connection pair are effectively embraced together, the threaded connection pair becomes an independent technology system without depending on the technology compensation of the third party to ensure the technical effectiveness of the connection technology system, namely even if no other objects are supported, the clearance between the threaded connection pair and a fastened workpiece is included, the effectiveness of the threaded connection pair cannot be influenced, the weight of equipment is greatly reduced, the ineffective load is removed, the effective load capacity, the braking performance, the energy conservation and emission reduction and other technical requirements of the equipment are improved, and the connection structure of the bidirectional conical internal threads and the traditional threads and the fastened workpiece has the unique relation no matter in non-rigid connection or rigid connection but the other thread technologies do not have The thread technology has advantages.

The bidirectional conical internal thread and the traditional thread are in transmission connection, a thread pair is formed by the external thread and the internal thread, a clearance must be formed between the bidirectional conical hole and the traditional external thread special cone, if oil and other media are lubricated between the internal thread and the external thread, a bearing oil film is easily formed, the clearance is favorable for forming the bearing oil film, the bidirectional conical internal thread and the traditional thread are applied to transmission connection and are equivalent to a group of sliding bearing pairs consisting of one pair and/or a plurality of pairs of sliding bearings, namely, each section of bidirectional conical internal thread bidirectionally contains a corresponding section of the traditional external thread to form a pair of sliding bearings, the number of the composed sliding bearings is adjusted according to application working conditions, namely, the bidirectional conical internal thread is effectively and bidirectionally engaged with the traditional external thread, namely, the number of the contained sections of the contained threads are effectively and bidirectionally contacted and clasped, according to the design of application working conditions, the traditional external thread special conical body is contained through the conical internal thread conical hole, and the conical external thread special conical body is positioned in multiple directions such as radial direction, axial direction, angular direction and circumferential direction, preferably, the special conical body is contained through the bidirectional conical hole, the radial direction and circumferential direction main positioning is assisted with the axial direction and angular direction auxiliary positioning, so that the inner conical body and the outer conical body are positioned in multiple directions until the conical surface of the bidirectional conical hole is embraced with the special conical surface of the special conical body to realize self-positioning or self-locking until the conical surface of the special conical body is in interference contact with the special conical surface of the special conical body, a special conical pair and thread pair synthesis technology is formed, and the transmission connection precision, efficiency and reliability of the conical thread technology, particularly the bidirectional conical internal thread and the traditional thread are ensured.

When the bidirectional conical internal thread and the traditional thread are tightly connected and hermetically connected, the technical performance is realized by the screwing connection of the bidirectional conical hole of the conical internal thread and the special conical surface of the traditional external thread cone, namely the sizing of the first spiral conical surface of the conical hole and the special conical surface of the traditional external thread cone is till the interference and/or the sizing of the second spiral conical surface of the conical hole and the special conical surface of the traditional external thread cone till the interference, according to the application working condition, the bearing in one direction and/or the bearing in two directions are realized simultaneously, namely the inner diameter and the outer diameter of the inner cone of the bidirectional conical hole under the guide of a spiral line are centered till the first spiral conical surface of the conical hole and the special conical surface of the traditional external thread cone clasp till the interference contact and/or the second spiral conical surface of the conical hole clasps with the special conical surface of the traditional external thread cone till the interference contact, the conical thread technology, particularly the bidirectional conical internal thread and traditional thread connection structure efficiency and reliability are ensured, and technical performances of mechanical mechanism connection, locking, looseness prevention, bearing, fatigue, sealing and the like are realized.

Therefore, the technical performances of the mechanical mechanism of the connection structure of the bidirectional conical internal 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 conical hole and the left side conical degree formed by the first spiral conical surface, namely the corresponding first cone angle alpha 1, the second spiral conical surface of the conical hole 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 special external conical surface of the traditional external thread and the conical degree of the traditional external thread formed by the contact of the traditional external thread and the bidirectional conical 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.

In the bidirectional conical internal 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 structure has guaranteed that the first heliciform conical surface of bell mouth and bell mouth second heliciform conical surface have sufficient length to have enough effective area of contact and intensity and the required efficiency of helical motion when guaranteeing two-way bell mouth conical surface and the special conical surface cooperation of traditional external screw thread.

In the bidirectional conical internal 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 has guaranteed that the first heliciform conical surface of bell mouth and bell mouth second heliciform conical surface have sufficient length to have enough effective area of contact and intensity and the required efficiency of helical motion when guaranteeing two-way bell mouth conical surface and the special conical surface cooperation of traditional external screw thread.

According to the bidirectional conical internal thread and the traditional thread, the first spiral conical surface of the conical hole and the second spiral conical surface of the conical hole are continuous helicoids or non-continuous helicoids.

The special conical surface of the special conical body is a continuous helical surface or a non-continuous helical surface.

In the bidirectional conical internal 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 function of threaded connection is realized through the contact and/or interference fit of the first spiral conical surface of the conical internal thread and the special conical surface of the traditional external thread and/or the contact and/or interference fit of the second spiral conical surface of the conical internal thread and the special conical surface of the traditional external thread.

In the bidirectional conical internal thread and the traditional thread, one end of the columnar parent body is provided with a head part with a size larger than the outer diameter of the columnar parent body and/or one end and/or two ends of the columnar parent body are/is provided with a head part with a small diameter smaller than the bidirectional conical 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 internal 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 asymmetric two-way tapered thread double nut and a conventional threaded bolt in a dumbbell-like shape (left-side taper is greater than right-side taper) according to a first embodiment of the present invention.

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

Fig. 3 is a schematic view of a connection structure between an asymmetric two-way tapered thread double nut and a conventional threaded bolt in a dumbbell-like shape (left-side taper is greater than right-side taper) according to the second embodiment of the present invention.

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

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

Fig. 6 is a schematic diagram of a connection structure of a hybrid combination of two nuts and a conventional threaded bolt, in which the hybrid combination of two nuts of the four-nut embodiment is a dumbbell-like (left-side taper is greater than right-side taper) asymmetric bidirectional tapered threaded nut body and a dumbbell-like (left-side taper is less than right-side taper) asymmetric bidirectional tapered threaded nut body.

Fig. 7 is a schematic view of a nut body dumbbell-like (left side taper is larger than right side taper) asymmetric bidirectional tapered internal thread and a complete unit body thread structure thereof according to the fourth embodiment of the present invention.

Fig. 8 is a schematic view of a dumbbell-shaped (left side taper smaller than right side taper) asymmetric bidirectional tapered internal thread of a nut body and a complete unit body thread structure thereof according to a fourth embodiment of the present invention.

Fig. 9 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. 10 is a diagram of a "inclined plane slide block model of the prior art thread technique principle-inclined plane principle" as referred to in the background of the invention.

Fig. 11 is a view of "lead angle of prior art screw 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 double taper hole 41, a double taper hole conical surface 42, a tapered hole first spiral conical surface 421, a first taper angle α 1, a tapered hole second spiral conical surface 422, a second taper angle α 2, an internal spiral line 5, an internal thread 6, a tapered body 7, a tapered body conical surface 72, an external thread 9, a dumbbell-like shape 94, 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 conical axis 01, a thread axis 02, a slider a on an inclined plane a inclined plane B, a gravity G, a gravity along inclined plane component G1, a friction force F, a friction force G, a force B, a force B, a force B, a force B, a force, a, A thread lead angle phi, an equivalent friction angle P, a traditional external thread large diameter d, a traditional external thread small diameter d1 and a traditional external thread medium diameter d 2.

Detailed Description

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

Example one

As shown in fig. 1 and fig. 2, the present embodiment adopts a connection structure of an asymmetric bidirectional tapered internal thread 6 and a conventional external thread 9, the bidirectional tapered internal thread and conventional threaded connection pair 10 includes a bidirectional tapered hole 41 spirally distributed on the inner surface of the cylindrical parent body 2 and a conventional threaded external thread 9, which are formed by contacting with the bidirectional tapered internal thread 6, and a special taper 7 spirally distributed on the outer surface of the cylindrical parent body 3, that is, the external thread 9 and the internal thread 6 are in thread fit with each other, the internal thread 6 is distributed with the spiral bidirectional tapered hole 41, the internal thread 6 exists in a form of a spiral bidirectional taper 41 and a "non-solid space", the external thread 9 exists in a form of a spiral special taper 7 and a "material solid", and the internal thread 6 and the external thread 9 are a relation between the containing member and the contained member: the internal thread 6 and the external thread 9 are sleeved together in a one-section-by-one screwing manner until the internal thread and the external thread are in interference fit, namely, the traditional external thread 9 is contained in the bidirectional taper hole 41 in a one-section-by-one manner along with the special taper body 7 formed by the contact with the bidirectional taper internal thread 6, the disordered freedom degree between the taper hole 4 and the special taper body 7 of the traditional external thread 9 is limited by bidirectional containing, the screw motion enables the bidirectional taper internal thread and the traditional thread connection pair 10 to obtain the necessary ordered freedom degree, and the technical characteristics of the taper pair and the thread pair are effectively synthesized.

The bi-directional tapered internal threads and the conventional threaded connection 10 in this embodiment are configured such that the bi-directional tapered bore conical surface 42 and the special cone conical surface 72 of the special cone 7 of the conventional external threads 9 cooperate with each other during use. The asymmetric bidirectional tapered internal threads in the embodiment and the tapered hole 4 of the conventional 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 includes a left taper 95 and a right taper 96, and the asymmetric bidirectional tapered threads 1 in the embodiment are such 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 external thread 9 is arranged on the outer surface of the cylindrical parent body 3, and is characterized in that the cylindrical parent body 3 is provided with a screw body 31, the outer surface of the screw body 31 is provided with a traditional external thread 9, the traditional external thread 9 comprises a triangular thread, a trapezoidal thread, a sawtooth thread and the like, which can be screwed with the bidirectional conical thread 1 to form other geometrical threads of the threaded connection pair 10, when the traditional external thread 9 is matched with the bidirectional conical internal thread 6 to form the threaded connection pair 10, the traditional external thread 9 is not the traditional thread in the original meaning but a special conical thread 1, the contact part of the special conical thread 1 and the bidirectional conical internal thread 6 forms a special conical body 7 of the traditional external thread 9 of the threaded connection pair 10, the special conical body 7 is provided with a special conical surface 72, and the effective conical surface area of the special conical surface 72 on the special conical body 7 of the traditional external thread 9 can be continuously increased along with the increase of the number of screwing use The increase, i.e. the conical surface 72 of the special cone will be enlarged continuously and will tend to have larger contact surface direction change with the conical surface 42 of the tapered hole of the bidirectional tapered internal thread 6, thus forming a special cone 7 with incomplete tapered geometry and having the technical spirit of the present invention, the external conical surface, i.e. the conical surface 72 of the special cone of the traditional external thread 9, will appear in line form first and will increase gradually with the increase of the number of times of use of the tip of the traditional external thread 9 in contact with the tapered hole 4 of the bidirectional tapered internal thread 6, i.e. the conical surface 72 of the special cone of the traditional external thread 9 will increase from line to plane, or the external conical surface matching with the bidirectional tapered internal thread 6 can be machined directly at the tip of the traditional external thread 9, which all meet the technical spirit of the present invention, the cylindrical parent body 3 can be solid or hollow, and comprises a cylinder, Cones, tubes, and the like require external threads on their outer surfaces.

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, tapered holes 4 distributed in a spiral shape are formed in the inner surfaces of the nut body 21 and the nut body 22, the tapered holes 4 comprise asymmetric bidirectional tapered holes 41, and the cylindrical parent body 2 comprises a cylindrical body and/or a non-cylindrical body and other workpieces and objects needing to be processed with the internal thread on the inner surface. The asymmetric bidirectional tapered hole 41 in the dumbbell-like shape 94 is characterized in that the asymmetric bidirectional tapered hole 41 is formed by symmetrically and oppositely jointing the upper top surfaces of two tapered holes with the same lower bottom surface and the same upper top surface but different taper heights, the lower bottom surfaces are positioned at two ends of the bidirectional tapered hole 41, when the bidirectional tapered thread 1 is formed, the two tapered holes are respectively jointed with the lower bottom surfaces of the adjacent bidirectional tapered holes 41, and/or are respectively jointed with the lower bottom surfaces of the adjacent bidirectional tapered holes 41, the internal thread 6 comprises a first spiral conical surface 421 of the tapered hole, namely a left side conical surface, and a second spiral conical surface 422 of the tapered hole, namely a right side conical surface and an internal spiral line 5, in a section passing through a thread axis 02, the complete single-section asymmetric bidirectional tapered internal thread 6 is a special bidirectional tapered geometric body which is in the dumbbell-like shape 94, has a small middle part and large two ends, and has a left side tapered hole taper larger than a right side tapered hole taper, the bidirectional tapered hole 41 includes a bidirectional tapered hole conical surface 42, an included angle formed by two plain lines of a left-side conical surface, namely a first conical hole spiral conical surface 421 is a first taper angle α 1, the left-side conical surface 421 forms a left-side taper 95 and is distributed in a right direction 98, the left-side taper 95 corresponds to the first taper angle α 1, an included angle formed by two plain lines of a right-side conical surface, namely a second conical hole spiral conical surface 422 is a second taper angle α 2, the tapered hole second spiral conical surface 422 forms a right-side taper 96 and is distributed in a left direction 97, the right-side taper 96 corresponds to the second taper angle α 2, the taper directions corresponding to the first and second taper angles α 1 and α 2 are opposite, the plain lines are intersecting lines of the conical surfaces and a plane passing through a conical axis 01, and a shape formed by the first conical hole conical surface 421 and the tapered hole second spiral conical surface 422 of the bidirectional tapered hole 41 and a central axis having a lower bottom edge coinciding with the cylindrical parent body 2 The right-angle sides of the right-angle trapezoid combination bodies which are symmetrical with the upper bottom sides of the two right-angle trapezoids with the same upper bottom sides but different right-angle sides and are oppositely jointed are circumferentially and uniformly rotated around the rotation center, the right-angle trapezoid combination bodies axially move along the central axis of the cylindrical parent body 2 at a uniform speed simultaneously, the spiral outer side surfaces of the rotary bodies formed by the two inclined sides of the right-angle trapezoid combination bodies are identical in shape, and the right-angle trapezoid combination bodies are special geometric bodies which are symmetrical with the upper bottom sides of the two right-angle trapezoids with the same lower bottom sides and the same upper bottom sides but different right-angle sides and are oppositely jointed, and the lower bottom sides of the two right-angle trapezoids are respectively positioned at the two ends of the right-angle trapezoid combination bodies.

The present embodiment adopts a connection structure of an asymmetric bidirectional conical internal thread 6 double nut and a conventional external thread 9, the nut body 21 and the nut body 22 are respectively located on the left side and the right side of a fastened workpiece 130, when a bolt and the double nut work, the connection relation between the bolt and the fastened workpiece 130 is rigid connection, the rigid connection means that a nut end surface bearing surface and a workpiece 130 bearing surface are bearing surfaces, including a locking bearing surface 111 and a locking bearing surface 112, and the workpiece 130 means a connected object including the workpiece 130.

The thread working support surfaces of the present embodiment are different and include 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 lock support surface 111 of the fastened workpiece 130, the left side helical conical surface of the bidirectional tapered thread 1 of the nut body 21 is the tapered thread support surface 122, that is, the tapered internal thread 6 tapered bore first helical conical surface 421 and the conventional external thread 9 special conical surface 72 are the tapered thread support surfaces 122 and the tapered bore first helical conical surface 421 and the conventional external thread 9 special conical surface 72 are mutually support surfaces, when the right end surface of the fastened workpiece 130 and the left end surface of the nut body 22 are the nut body 22 and the lock support surface 112 of the fastened workpiece 130, the right side helical conical surface of the bidirectional tapered thread 1 of the nut body 22 is the tapered thread support surface 121, namely, the second conical helical surface 422 of the tapered bore of the tapered internal thread 6 and the conical surface 72 of the conventional external thread 9 special cone are the tapered thread bearing surfaces 121, and the second conical helical surface 422 of the tapered bore and the conical surface 72 of the conventional external thread 9 special cone are bearing surfaces.

The bidirectional conical internal thread is in transmission connection with the traditional thread, the bidirectional conical hole 41 is in screwing connection with the special conical body 7 of the traditional external thread 9, bidirectional bearing is realized, a clearance 101 must be formed between the bidirectional conical hole 41 and the special conical body 7 of the traditional external thread 9, 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 bidirectional conical internal thread 6 bidirectionally contains one section of traditional external thread 9 correspondingly to form a sliding bearing, the number of the sliding bearings formed is adjusted according to application working conditions, namely the bidirectional conical internal thread 6 is effectively and bidirectionally jointed with the traditional external thread 9, namely the contained and contained thread sections are effectively and bidirectionally contacted and clasped, the bidirectional contained traditional external thread 9 special conical body 7 and the radial contained thread section are designed according to the application working conditions, the bidirectional containing traditional external thread 9 through the conical hole 4, The axial, angular, circumferential and other multi-direction positioning ensures the precision, efficiency and reliability of the transmission connection of the conical thread technology, especially the bidirectional conical internal thread and the traditional thread.

This two-way toper internal thread and traditional screw thread, fastening connection, during sealing connection, its technical performance is realized through the closure connection of two-way bell mouth 41 and the special conical body 7 of traditional external screw thread 9, namely the first heliciform conical surface 421 of bell mouth and the special conical body conical surface 72 sizing of traditional external screw thread 9 are until interference and/or the special conical surface 7 sizing of traditional external screw thread 9 of bell mouth second heliciform conical surface 422 is until interference is realized, according to the application condition, reach one direction and bear and/or two directions bear respectively simultaneously, namely two-way bell mouth 41 and the special conical body 7 of traditional external screw thread 9 are interior cone and outer cone internal and external diameter centering under the guide of helix until the first heliciform conical surface 421 of bell mouth and the special conical body conical surface 72 of special conical body 7 of traditional external screw thread 9 embrace until interference contact and/or conical hole second heliciform conical surface 422 and the special conical body 7 of traditional external screw thread 9 special conical body 7 are engaged with each other The conical surface 72 is embraced until interference contact is achieved, so that 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 internal 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 left taper angle α 1 corresponding to the first tapered hole spiral conical surface 421 and the left taper 95 formed by the first tapered hole spiral conical surface 421, the right taper angle α 2 corresponding to the second tapered hole spiral conical surface 422 and the right taper angle 96 formed by the second tapered hole spiral conical surface 422, and also related to the special cone conical surface 72 of the special cone 7 of the traditional external thread 9 and the taper of the special cone 7 of the traditional external thread 9 formed by contacting with the bidirectional tapered internal thread 6. 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 conical internal 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 structure ensures that the first conical surface 421 and the second conical surface 422 have sufficient lengths, thereby ensuring that the bidirectional conical bore conical surface 42 has sufficient effective contact area and strength and efficiency required for the spiral movement when cooperating with the special cone conical surface 72 of the special cone 7 of the conventional external thread 9.

According to the bidirectional conical internal 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 first and second tapered bore conical surfaces 421 and 422 have sufficient length to ensure that the bi-directional tapered bore conical surface 42 has sufficient effective contact area and strength and efficiency required for the screw motion when mated with the special cone conical surface 72 of the special cone 7 of the conventional external thread 9.

In the bidirectional conical internal thread and the traditional thread, the first conical hole spiral conical surface 421 and the second conical hole spiral conical surface 422 are both continuous helical surfaces or non-continuous helical surfaces.

In the bidirectional conical internal 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. Compared with the prior art, the bidirectional conical internal thread and the traditional threaded 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 work 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 lock support surface 111, and the left end surface of the nut body 22, i.e. the lock support surface 112, are in direct contact with each other and are lock support surfaces, when the right end surface of the nut body 21 is the lock support surface 111, the left side helical conical surface of the bidirectional tapered thread 1 of the nut body 21 is the tapered thread support surface 122, i.e. the tapered bore first helical conical surface 421 of the tapered internal thread 6 and the conventional male thread 9 special cone surface 72 are the tapered thread support surfaces 122 and the tapered bore first helical conical surface 421 and the conventional male thread 9 special cone surface 72 are support surfaces, when the left end surface of the nut body 22 is the lock support surface 112, the right side helical conical surface of the bidirectional tapered thread 1 of the nut body 22 is the tapered thread support surface 121, namely, the tapered bore second helical conical surface 422 of the tapered internal thread 6 and the conventional external thread 9 special cone conical surface 72 are tapered thread bearing surfaces 121 and the tapered bore second helical conical surface 422 and the conventional external thread 9 special cone conical surface 72 are bearing surfaces.

In this embodiment, when the inner cylindrical parent body 2, 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 threaded connection pair 10, effectively clasped together, the outer cylindrical parent body 2, i.e., the nut body 22 not adjacent to the fastened workpiece 130, may be left as it is 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 connection technical reliability, etc.), the removed nut body 22 may be used not as a connection nut but as an installation nut, and the installation nut internal thread may be manufactured by using a bidirectional tapered thread, or may be manufactured by using a unidirectional tapered thread and other threads capable of being screwed with the bolt thread, i.e., including a triangular thread, a helical thread, and a helical thread, or a helical thread, and a helical thread, and a nut body, and a nut body, and a nut body, are formed by using a nut body, and, The nut body 22 manufactured by threads of non-tapered threads such as trapezoidal threads, saw-tooth threads and the like ensures the reliability of the connection technology, the threaded connection pair 10 is a closed-loop fastening technology system, namely after the internal threads 6 and the external threads 9 of the threaded connection pair 10 are effectively clasped together, the threaded connection pair 10 is an independent technology system without depending on the technology compensation of the third party to ensure the technical effectiveness of the connection technology system, namely even if no other objects are supported, the clearance between the threaded connection pair 10 and the fastened workpiece 130 cannot influence the effectiveness of the threaded connection pair 10, so that the weight of the equipment is greatly reduced, the ineffective load is removed, the effective load capacity, the braking performance, the energy conservation and emission reduction of the equipment are improved, and the technical requirements of the threaded connection pair 10 of the connection structure of the bidirectional tapered internal threads and the traditional threads on the fastened workpiece 130, such as non-rigid connection or rigid connection, on the unique other threads The screw thread technique advantage that art did not possess.

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, 7 and 8, the structure, principle and implementation steps of this embodiment are similar to those of the first embodiment and the third embodiment, except that in this embodiment, on the basis of the first embodiment, the second embodiment and the third embodiment, different dumbbell-like 94 bidirectional tapered internal threads 6, in which the left side taper 95 is greater than the right side taper 96 and the left side taper 95 is smaller than the right side taper 96, are respectively applied to the nut body 21 and the nut body 22 according to the requirements of the operating conditions, the internal threads 6 of the nut body 21 are asymmetric bidirectional tapered internal threads 6, in which the left side taper 95 is smaller than the right side taper 96, the dumbbell-like 94 is smaller than the right side taper 96, the internal threads 6 of the nut body 22 are asymmetric bidirectional tapered internal threads 6, in which the left side taper 95 is greater than the right side taper 96, and the specific combination is implemented according to the requirements of the operating conditions.

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, bolt body 31, tapered bore 4, bi-directional tapered bore 41, bi-directional tapered bore conical surface 42, tapered bore first helical conical surface 421, first taper angle α 1, tapered bore second helical conical surface 422, second taper angle α 2, internal spiral 5, internal thread 6, tapered body 7, tapered body conical surface 72, external thread 9, dumbbell-like 94, left-side taper 95, right-side taper 96, left-side distribution 97, right-side distribution 98, thread connection and/or thread pair 10, play 101, self-locking, self-positioning, cone pressure, cone axis 01, thread axis 02, mirror image, sleeve, shaft, single cone, double cone, internal cone, tapered bore, external cone, cone pair, helical structure, helical taper, and tapered taper, helical taper, The terms screw motion, screw body, complete unit body thread, axial force angle, counter axial force angle, centripetal force, counter colinear, internal stress, bi-directional force, unidirectional force, sliding bearing pair, lock bearing surface 111, lock bearing surface 112, tapered thread bearing surface 122, tapered thread bearing surface 121, non-physical space, material entity, workpiece 130, nut body locking orientation, non-rigid connection, non-rigid material, transmission member, gasket, etc., are used only for the purpose of more conveniently describing and explaining the essence of the invention, and they are to be construed as any additional limitation which is contrary to the spirit of the invention.

Claims (10)

1. The dumbbell-like asymmetric bidirectional tapered thread internal thread and traditional thread connecting structure comprises an external thread (9) and an internal thread (6) which are in thread fit with each other, and is characterized in that the complete unit body threads of the internal thread (6) are dumbbell-like asymmetric bidirectional tapered holes (41) which are spiral, small in the middle, large in two ends, and different in left-side taper (95) and right-side taper (96), the dumbbell-like asymmetric bidirectional tapered holes comprise two taper structure forms that the left-side taper (95) is larger than the right-side taper (96) and the left-side taper (95) is smaller than the right-side taper (96), the internal thread (6) is a spiral bidirectional tapered hole (41) formed in the inner surface of a cylindrical parent body (2), the external thread (9) is a spiral conical body (7) formed by contacting the traditional thread tooth body on the outer surface of the cylindrical parent body (3) with the internal thread (6), and the left-side conical surface of the internal thread (6) forms a left-side taper (95) corresponding to a first taper angle alpha 1, The right conical surface forms a right conical degree (96) corresponding to a second conical angle alpha 2, the left conical degree (95) and the right conical degree (96) are opposite in direction and different in conical degree, the internal thread (6) and the external thread (9) contain the conical bodies through conical holes until the internal conical surface and the external conical surface are mutually loaded, the left conical degree (95) is greater than the right 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 1 is greater than 53 degrees and less than 180 degrees; the left side taper (95) is less than the right side taper (96), wherein the first taper angle alpha 1 is greater than 0 DEG and less than 53 DEG, the second taper angle alpha 2 is greater than 0 DEG and less than 53 DEG, or the second taper angle alpha 2 is greater than 53 DEG and less than 180 deg.

2. The connection structure of the dumbbell-like asymmetric bidirectional tapered internal threads and the conventional threads as claimed in claim 1, wherein the internal threads (6) include a left side conical surface (i.e., a first conical hole helical conical surface (421) and a right side conical surface (i.e., a second conical hole helical conical surface (422) of the bidirectional conical hole conical surface (42) and the internal threads (5), the first conical hole helical conical surface (421) and the second conical hole helical conical surface (422), i.e., the bidirectional conical surfaces, form a shape that is symmetrical with and joined to the upper bases of two right trapezoids having the same lower base and the same upper base but different right-angled sides, which are superposed on the central axis of the cylindrical parent body (2), and the right-angled trapezoid combinations axially move at a constant speed along the central axis of the cylindrical parent body (2) at the same time while rotating in the circumferential direction, 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 dumbbell-like asymmetric bidirectional tapered internal threads and the conventional threads as claimed in claim 2, wherein the axial movement distance of the right-angled trapezoidal combination is at least one time as long as the sum of the right-angled sides of the right-angled trapezoidal combination when the right-angled trapezoidal combination rotates at a constant speed for one circle.

4. The connection structure of the dumbbell-like asymmetric bidirectional tapered internal threads and the conventional threads as claimed in claim 2, wherein the axial movement distance of the right-angled trapezoidal combined body is equal to the sum of the right-angled sides of the right-angled trapezoidal combined body when the right-angled trapezoidal combined body rotates at a constant speed for one circle.

5. The connection structure of the dumbbell-like asymmetric bidirectional tapered internal threads with the conventional threads as claimed in claim 2, wherein the left and right conical surfaces of the internal threads (6), i.e., the first conical tapered hole surface (421), the second conical tapered hole surface (422), and the internal threads (5), are continuous helical surfaces or non-continuous helical surfaces; the cone (7) has a cone conical surface (72) and the cone conical surface (72) is a continuous spiral surface or a discontinuous spiral surface.

6. The connection structure of the dumbbell-like asymmetric bidirectional tapered female screw thread and the conventional screw thread according to claim 1, wherein the female screw thread (6) is formed by symmetrically and oppositely engaging upper top surfaces of two tapered holes (4) having the same lower bottom surface and the same upper top surface but different taper heights, and the lower bottom surfaces are located at both ends of the bidirectional tapered holes (41), and the dumbbell-like (94) asymmetric bidirectional tapered female screw thread (1) is formed by respectively engaging the lower bottom surfaces of the adjacent bidirectional tapered holes (41), and/or spirally engaging the respective lower bottom surfaces of the adjacent bidirectional tapered holes (41) to form the dumbbell-like (94) asymmetric bidirectional tapered female screw thread.

7. The internal thread of the dumbbell-like asymmetric bidirectional tapered thread according to claim 1 or 6, wherein the conventional thread includes any one of a triangular thread, a trapezoidal thread, a zigzag thread, a rectangular thread, and a circular arc thread, and the conventional thread includes a conventional thread in which a thread body, i.e., a tooth body, is deformed.

8. The connection structure of the dumbbell-like asymmetric bidirectional tapered thread internal threads and the traditional threads as claimed in claim 1, wherein the cylindrical parent body (2) comprises a cylindrical body and/or a non-cylindrical body of which the inner surface is required to be processed with the internal threads (6), the inner surface comprises a cylindrical surface and/or a non-cylindrical surface geometry comprising a conical surface, when a single nut or a double nut or a plurality of nuts of the internal threads (6) of the cylindrical parent body (2) and the external threads (9) of the screw body (31) of the cylindrical parent body (3) are matched and combined with each other in a threaded manner, the threads of the cylindrical parent body (2) comprise the internal threads (6) with dumbbell-like (94) left side conicity (95) larger than right side conicity (96) and/or the internal threads (6) with dumbbell-like (94) left side conicity (95) smaller than right side conicity (96), when one cylindrical parent body (2) is effectively combined with the cylindrical parent body (3), namely the internal thread (6) and the external thread (9) which form the threaded connection pair (10) are effectively embraced together, the other cylindrical parent body is removed or reserved, the removed cylindrical parent body is used as an installation process nut, the internal thread of the removed cylindrical parent body comprises a bidirectional tapered thread (1), or the removed cylindrical parent body is manufactured by adopting a unidirectional tapered thread which can be screwed with the cylindrical parent body (3) and a traditional thread.

9. The dumbbell-like asymmetric bidirectional tapered threaded internal thread and traditional threaded connection structure of claim 1, it is characterized in that the internal thread (6) has the capability of assimilating the external thread (9), the external thread (9) assimilated by the internal thread 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 conical hole (41) and a spiral conical body (7), and the conical surface (72) of the cone body, the first spiral conical surface (421) of the conical hole and the second spiral conical surface (422) of the conical hole 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 (42) of the bidirectional tapered hole and the conical surface (72) of the conical body are in self-positioning contact and/or self-locking is generated.

10. The internal thread connection structure of a dumbbell-like asymmetric bidirectional tapered thread according to claim 1, wherein the internal thread (6) includes a single-thread body with an incomplete tapered geometry, i.e., a single-thread body with an incomplete unit-thread.

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