CN214331125U - Similar-olive-shaped symmetrical bidirectional conical threaded connection pair - Google Patents

Abstract

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

Description

Similar-olive-shaped symmetrical bidirectional conical threaded connection pair

Technical Field

The utility model belongs to the technical field of equipment is general, especially, relate to a two-way toper threaded connection of olive form symmetry is vice.

Background

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

Modern threads began in 1841 as uk hui threads. According to the modern thread technical theory, the basic conditions of thread self-locking are as follows: the equivalent friction angle must not be less than the helix angle. The thread is a recognition of the modern thread technology based on the technical principle of the modern thread, namely the inclined plane principle, and becomes an important theoretical basis of the modern thread technology. The first theoretical explanation of the slope principle was steve, who studied the parallelogram law of the equilibrium of the object on the slope and the resultant of forces, he proposed the famous slope law in 1586: the gravity force in the direction of the inclined plane on an object placed on the inclined plane is proportional to the sine of the inclination angle. The inclined plane is a smooth plane inclined with the horizontal plane, the screw is the deformation of the inclined plane, the thread is like the inclined plane wrapped outside the cylinder, the more gentle the inclined plane is, the greater the mechanical benefit is (see figure 8) (Yangshisan, Wang Xiuya, the principle discussion of screws, Gauss arithmetic research).

The 'inclined plane principle' of modern screw thread is an inclined plane sliding block model (see figure 9) established based on an inclined plane law, and people think that under the condition of small static load and temperature change, when a thread lead angle is smaller than or equal to an equivalent friction angle, a screw thread pair has a self-locking condition. The lead angle of the thread (see fig. 10), also known as the lead angle of the thread, is the angle between the tangent to the helix on the pitch diameter cylinder and the plane perpendicular to the axis of the thread, which affects the self-locking and anti-loosening of the thread. The equivalent friction angle is the friction angle corresponding to the final transformation of the different friction forms into the most common bevel slider form. In general, in an inclined plane slider model, when an inclined plane inclines to a certain angle, the friction force of the slider at the moment is just equal to the component of gravity along the inclined plane, the object is just in a stress balance state at the moment, and the inclined plane inclination angle at the moment is called as an equivalent friction angle.

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

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

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

Disclosure of Invention

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

In order to achieve the above purpose, the utility model adopts the following technical proposal: the olive-shaped symmetrical bidirectional tapered threaded connection pair is used as a threaded connection pair consisting of symmetrical bidirectional tapered external threads and symmetrical bidirectional tapered internal threads, is a special threaded pair technology for synthesizing technical characteristics of a conical pair and a spiral motion, is a threaded technology for synthesizing technical characteristics of a bidirectional conical body and a spiral structure, consists of two single conical bodies, wherein the two single conical bodies are respectively positioned at the left side and the right side of the bidirectional conical body, namely the two single conical bodies with opposite directions of left-side taper and right-side taper and same taper and/or approximately same two directions, are spirally distributed on the outer surface of a cylindrical parent body to form external threads and/or are spirally distributed on the inner surface of the cylindrical parent body to form internal threads, no matter the external threads, the complete unit body thread is a special olive-like bidirectional tapered geometric body with a large middle part and small ends, and the left side taper and the right side taper are the same and/or approximately the same.

This kind of symmetrical two-way toper screw thread connection of olive form is vice, the symmetrical two-way toper screw thread definition of similar olive form, can express as: the special bidirectional cone-shaped geometric body is characterized in that the special bidirectional cone-shaped geometric body is provided with a symmetrical bidirectional cone-shaped hole (or a symmetrical bidirectional cone frustum body) which is provided with a left-side taper and a right-side taper, has the left-side taper and the right-side taper in opposite directions and has the same taper and/or is approximately the same, and is spirally distributed continuously and/or discontinuously along a spiral line and has a large middle part and small ends on the surface of a cylinder or a cone. "for manufacturing reasons, the thread head and the thread tail of the symmetrical bidirectional tapered thread may be incomplete bidirectional tapered geometry. Unlike modern thread technology, the number of complete unit body threads and/or incomplete unit body threads is referred to as "bi-directional tapered threads" and "pitch" rather than "full threads", i.e., several threads are referred to as "pitch". The change of the number of the threads is called to occur based on the connotation change of the thread technology, and the thread technology is changed from the original meshing relationship of the internal threads and the external threads of the modern threads into the cohesive relationship of the internal threads and the external threads of the bidirectional tapered threads.

This kind of two-way toper threaded connection of olive form symmetry is vice, including being the spiral helicine distribution in the two-way cone frustum body of column parent surface and being the two-way bell mouth of spiral helicine distribution in tube-shape parent internal surface, including screw-thread fit's external screw thread and internal thread each other promptly, the internal thread distributes and is spiral helicine two-way bell mouth and exists with "non-entity space" form, the external screw thread distributes and is spiral helicine two-way cone frustum body and exists 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 operating condition of screw thread is: the internal thread and the external thread are one-section two-way conical geometric bodies which are sleeved together in a screwing mode, the internal thread and the external thread are in cohesion until one-side two-way bearing or left-side right-side two-way bearing or sizing interference fit, whether two-way bearing is carried out on two sides simultaneously or not is related to actual working conditions of the application field, namely, the two-way conical hole is one-section wrapping cohesion two-way conical table body, namely, the internal thread is one-section cohesion corresponding external thread.

The threaded connection pair is a thread pair formed by a conical pair formed by mutually matching a spiral outer conical surface and a spiral inner conical surface, the outer conical surface of an outer conical body of the bidirectional conical thread and the inner conical surface of an inner conical body are both bidirectional conical surfaces, when the threaded connection pair is formed between the bidirectional conical threads, the junction surface of the inner conical surface and the outer conical surface is taken as a supporting surface, namely the conical surface is taken as the supporting 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 threaded connection pair mainly depend on the conical surface and the taper size of the conical surface, namely the conical surface and the taper size of the inner thread and the outer thread, which form the olive-shaped symmetrical bidirectional conical threaded connection pair, and the threaded connection pair is a non-tooth thread.

Compared with the one-way force distributed on the inclined plane and the meshing relation of the inner thread and the outer thread of the inner tooth body and the outer tooth body, the olive-shaped symmetrical two-way tapered threaded connection pair two-way cone body is in a two-way state no matter the single cone body is distributed on any one side of the left side or the right side, the cross section of the cone body is formed by two plain lines of a cone body in a two-way mode through the cone axis, the plain line is the intersection line of the cone surface and a plane passing through the cone axis, the cone principle of the olive-shaped symmetrical two-way tapered threaded connection pair shows the axial force and the counter axial force, the axial force and the corresponding counter axial force are synthesized by two-way forces, the axial force and the corresponding counter axial force are butted, the inner thread and the outer thread are in a clasping relation, namely the threaded connection cone body clasps the outer thread through the inner thread, namely a section of cone body (the inner thread cone body) clasps the corresponding section of a section of cone body until the clasping sizing matching is carried out to realize self-positioning or until the sizing interference contact is carried out, the inner cone and the outer cone are radially locked or self-positioned together through the radial locking of the taper hole and the cone frustum body, so that the self-locking or self-positioning of the thread pair is realized, and the thread connection pair formed by the internal thread and the external thread of the non-traditional thread is realized through mutual abutting between the tooth body and the tooth body to realize the thread connection performance.

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 and/or anti-axial central angle is less than 180 degrees and greater than 127 degrees, the conical pair is in a strong self-positioning state, strong self-positioning of the inner and outer cones is easily achieved, when the axial and/or anti-axial central angle is infinitely close to 180 degrees, the inner and outer cones of the conical pair have the strongest self-positioning capability, the axial and/or anti-axial central angle is equal to and/or less than 127 degrees and greater than 0 degrees, the conical pair is in a weak self-positioning state, the axial and/or anti-axial central angle tends to change towards the direction infinitely close to 0 degrees, and the inner and outer cones of the conical pair change from self-positioning capability towards the direction of attenuation trend until the inner and outer cones of the conical pair completely do not have 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 bearing of the left side of the conical surface and/or the bearing of the right side of the conical surface and/or the bidirectional simultaneous bearing of the right side of the left side conical surface and/or the conical surface of the right side of the conical surface, the disordered freedom degree between the conical hole and the cone frustum is further limited, the symmetrical bidirectional tapered thread connecting pair obtains the necessary ordered freedom degree through the spiral motion, and the technical characteristics of the conical pair and the thread pair are effectively synthesized to form a brand new thread technology.

When the olive-shaped symmetrical bidirectional tapered threaded connection pair is used, the bidirectional truncated cone conical surface of the external bidirectional tapered thread is matched with the bidirectional tapered hole conical surface of the internal bidirectional tapered thread.

The bidirectional cone, namely the cone frustum and/or the cone hole, of the cone pair forming the olive-like symmetrical bidirectional tapered threaded connection pair can realize self-locking and/or self-positioning of the threaded connection pair without any taper or any taper angle, the inner cone and the outer cone of the bidirectional cone have to reach a certain taper or a certain taper angle, the symmetrical bidirectional tapered threaded connection pair has self-locking and self-positioning properties, the taper comprises the left taper and the right taper of the inner thread and the outer thread, the left taper corresponds to the left taper, namely the first taper angle alpha 1, preferably 0 degrees < the first taper angle alpha 1 < 53 degrees, preferably the first taper angle alpha 1 is 2-40 degrees, and the right taper corresponds to the right taper, namely the second taper angle alpha 2, preferably, the second taper angle alpha 2 is more than 0 degrees and less than 53 degrees, preferably, the value of the second taper angle alpha 2 is 2 to 40 degrees, in particular to special fields, preferably, the first taper angle alpha 1 is more than 53 degrees and less than 180 degrees, the second taper angle alpha 2 is more than 53 degrees and less than 180 degrees, preferably, the first taper angle alpha 1 and the second taper angle alpha 2 are more than 53 degrees and less than 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 olive-shaped symmetrical bidirectional tapered threaded connection pair is characterized in that conical frustum bodies which are distributed spirally are arranged on the outer surface of a cylindrical parent body, the olive-shaped symmetrical bidirectional tapered threaded connection pair comprises the olive-shaped symmetrical bidirectional conical frustum bodies, the cylindrical parent body can be solid or hollow and comprises workpieces and objects which need to be threaded on the outer surface, such as cylinders and/or non-cylinders, and the outer surface comprises the outer surface geometrical shapes, such as non-cylindrical surfaces, such as cylindrical surfaces and conical surfaces.

The olive-shaped symmetrical bidirectional conical thread connecting pair is characterized in that the symmetrical bidirectional conical frustum bodies are screw threads formed by symmetrically and oppositely jointing the lower bottom surfaces of the same two conical frustum bodies to form a spiral thread, the upper top surfaces of the screw threads are positioned at two ends of the bidirectional conical frustum bodies, and the olive-shaped symmetrical bidirectional conical thread is formed by mutually jointing the upper top surfaces of the adjacent bidirectional conical frustum bodies and/or mutually jointing the upper top surfaces of the adjacent bidirectional conical frustum bodies to form a spiral thread, the external thread comprises a first spiral conical surface of the conical frustum body, a second spiral conical surface of the conical frustum body and an external spiral line, the olive-shaped symmetrical bidirectional conical external thread is formed, in the section passing through the axis of the thread, the complete single-section symmetrical bidirectional conical external thread is a special bidirectional conical geometric body which is large in the middle, small in two ends, identical in left-side taper and right-side taper and/or approximately identical in left-side taper, the symmetrical bidirectional cone frustum comprises a bidirectional cone frustum conical surface, wherein the included angle between two element lines of the left conical surface, namely a first spiral conical surface of the cone frustum is a first cone angle alpha 1, the first spiral conical surface of the cone frustum forms left-side taper and is distributed in the left direction, the included angle between two element lines of the right conical surface, namely a second spiral conical surface of the cone frustum is a second cone angle alpha 2, the second spiral conical surface of the cone frustum forms right-side taper and is distributed in the right direction, the taper directions corresponding to the first cone angle alpha 1 and the second cone angle alpha 2 are opposite, the element lines are intersection lines of conical surfaces and planes passing through cone axes, the shape formed by the first spiral conical surface of the cone frustum of the bidirectional cone frustum and the second spiral conical surface of the cone frustum is symmetrical to the right-angle edge of a right-angle trapezoid combination body which is formed by the same central axis as the lower bottom edges of two right-angle trapezoids superposed on the columnar parent body and is jointed oppositely, and the right-angle edge of the right-angle trapezoid combination body is used for circumferential rotation and uniform speed rotation and uniform rotation The right-angle trapezoidal combination body simultaneously moves axially at a constant speed along the central axis of the columnar parent body, the shapes of the spiral outer side surfaces of the revolution bodies formed by the two inclined sides of the right-angle trapezoidal combination body are the same, and the right-angle trapezoidal combination body refers to a special geometric body in which the lower bottom edges of the two same right-angle trapezoids are symmetrically and oppositely jointed, and the upper bottom edges of the two same right-angle trapezoids are respectively positioned at the two ends of the right-angle trapezoidal combination body.

This kind of olive form symmetry two-way toper threaded connection is vice, the internal thread setting at tube-shape parent internal surface, characterized by, tube-shape parent internal surface on have the bell mouth that is the heliciform and distributes, including kind olive form symmetry two-way bell mouth, tube-shape parent including cylinder and/or non-cylinder etc. need be at its internal surface processing internal thread's work piece and object, the internal surface include internal surface geometry such as non-cylinder surfaces such as cylinder surface and conical surface.

The olive-shaped symmetrical bidirectional tapered thread connecting pair is characterized in that the lower bottom surfaces of two same tapered holes are symmetrical and are mutually jointed in opposite directions to form a spiral thread, the upper top surfaces of the two opposite tapered holes are positioned at two ends of the bidirectional tapered holes, the olive-shaped symmetrical bidirectional tapered thread is formed by mutually jointing the upper top surfaces of the two opposite tapered holes and/or mutually jointing the upper top surfaces of the two opposite tapered holes to form a spiral thread, the internal thread comprises a first spiral conical surface of the tapered hole, a second spiral conical surface of the tapered hole and an internal spiral line to form an olive-shaped symmetrical bidirectional tapered internal thread, and in a section passing through a thread axis, the complete single-section symmetrical bidirectional tapered internal thread is a special olive-shaped bidirectional tapered geometric body which has a large middle and small two ends, and has the same left-side taper and right-side taper and/or is approximately the same, the bidirectional tapered hole comprises a bidirectional tapered hole conical surface, the left conical surface of the bidirectional tapered hole conical surface, namely an included angle formed by two plain lines of 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 left direction, the right conical surface of the bidirectional tapered hole, namely an included angle formed by two plain lines of 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 right direction, the corresponding taper directions of the first taper angle alpha 1 and the second taper angle alpha 2 are opposite, the plain lines are intersection lines of a conical surface and a plane passing through a conical axis, the shape formed by the first spiral conical surface of the bidirectional tapered hole and the second spiral conical surface of the tapered hole is equal in circumferential rotation speed by taking the bottom sides of two right-angle trapezoidal right-angle combined bodies which are the same as the central axis of the cylindrical parent body and are symmetrical and are combined to form a right-angle circumferential rotation center, and the right-angle trapezoidal combined to form is uniform in the right-angle The body simultaneously moves axially at a constant speed along the central axis of the cylindrical parent body, and the shapes of the spiral outer side surfaces of the revolution bodies formed by the two inclined sides of the right-angle trapezoid combination bodies are the same, wherein the right-angle trapezoid combination bodies are special geometric bodies with the lower bottom edges of the two same right-angle trapezoids being symmetrical and oppositely jointed and the upper bottom edges being respectively positioned at the two ends of the right-angle trapezoid combination bodies.

In the olive-like symmetrical bidirectional tapered threaded connection pair, the joint of two adjacent spiral conical surfaces of the external thread and the joint of two adjacent spiral conical surfaces of the internal thread are respectively provided with a sharp angle and/or a non-sharp angle and other connection forms, and the sharp angle is relative to the non-sharp angle and refers to a structure form without specially performing non-sharp angle treatment.

In the olive-like symmetrical bidirectional tapered threaded connection pair, when the connection form is a sharp angle, the spiral bidirectional truncated cone comprises a truncated cone body, a first spiral conical surface, a second spiral conical surface, a third spiral conical surface, a fourth spiral conical surface, a fifth spiral conical surface, a sixth spiral line and a sixth spiral line, wherein the first spiral conical surface of the truncated cone body of the same spiral bidirectional truncated cone body is connected with the second spiral conical surface of the truncated cone body of the adjacent bidirectional truncated cone body in an outer sharp angle shape structure to form the spirally distributed outer spiral line; the inner thread large diameter between the joint of the first spiral conical surface of the conical hole of the two-way conical hole of the same spiral and the second spiral conical surface of the conical hole is connected in an inner closed angle shape to form an inner spiral line which is spirally distributed, and the inner thread small diameter between the joint of the first spiral conical surface of the conical hole of the two-way conical hole of the same spiral and the second spiral conical surface of the conical hole of the adjacent two-way conical hole and/or between the joint of the second spiral conical surface of the conical hole of the two-way conical hole of the same spiral and the first spiral conical surface of the conical hole of the adjacent two-way conical hole is connected in an outer closed angle shape structure to form an inner spiral line which is spirally distributed.

In the olive-like symmetrical bidirectional tapered threaded connection pair, when the connection form is non-sharp angles, the spiral bidirectional truncated cone structure is characterized in that the external thread major diameter between the joint of the first spiral conical surface of the truncated cone body of the same spiral bidirectional truncated cone body and the second spiral conical surface of the truncated cone body is an external spiral structure which is connected by a non-external sharp corner and is spirally distributed or flat-topped or circular-arc-shaped, and the external thread minor diameter between the joint of the first spiral conical surface of the truncated cone body of the same spiral bidirectional truncated cone body and the second spiral conical surface of the truncated cone body of the adjacent bidirectional truncated cone body and/or between the joint of the second spiral conical surface of the truncated cone body of the same spiral bidirectional truncated cone body and the first spiral conical surface of the truncated cone body of the adjacent bidirectional truncated cone body is an external spiral structure which is connected by a non-internal sharp corner and is spirally distributed or grooved or circular-arc-shaped; the large diameter of the internal thread between the joint of the first spiral conical surface of the conical hole of the same spiral bidirectional conical hole and the second spiral conical surface of the conical hole adopts an internal spiral structure which is connected with a non-inner sharp corner and forms spiral distribution or a groove or an arc, the small diameter of the internal thread between the first spiral conical surface of the conical hole of the same spiral bidirectional conical hole and the joint of the second spiral conical surface of the conical hole of the adjacent bidirectional conical hole and/or between the second spiral conical surface of the conical hole of the same spiral bidirectional conical hole and the joint of the first spiral conical surface of the conical hole of the adjacent bidirectional conical hole adopts an internal spiral structure which is connected with a non-outer sharp corner and forms spiral distribution or a flat top or an arc, the non-outer sharp corner refers to a geometrical shape of which the cross section is a plane or an arc, the non-inner sharp corner refers to a geometrical shape of which the cross section is a groove or an arc, the interference generated when the internal thread and the external thread are screwed can be avoided, the oil and the dirt can be stored, the practical application can adopt a groove or arc structure to process the external thread small diameter and the internal thread large diameter according to the situation, the external thread large diameter and the internal thread small diameter adopt a sharp-angled structure to process and/or the external thread large diameter and the internal thread small diameter adopt a plane or arc structure to process, the external thread small diameter and the internal thread large diameter adopt a sharp-angled structure to process and/or the external thread small diameter and the internal thread large diameter adopt a groove or arc structure to process, and the external thread large diameter and the internal thread small diameter adopt a plane or arc structure to process and the like.

The structure is characterized in that the structure comprises an external thread with a large diameter adopting an external sharp corner shape, an external thread with a small diameter adopting an internal sharp corner shape, an internal thread with a large diameter adopting an internal sharp corner shape and an internal thread with a small diameter adopting an external sharp corner shape; or the minor diameter of the external thread adopts a second groove or arc, the major diameter of the internal thread adopts a first groove or arc structure for treatment, and the major diameter of the external thread and the minor diameter of the internal thread keep a sharp-angled structure; or the major diameter of the external thread adopts a second plane or an arc, the minor diameter of the internal thread adopts a first plane or an arc structure for treatment, and the minor diameter of the external thread and the major diameter of the internal thread keep a sharp angle structure; or the major diameter of the external thread adopts a second plane or an arc, the minor diameter of the external thread adopts a second groove or an arc structure for treatment, the major diameter of the internal thread adopts an inner sharp corner shape, and the minor diameter of the internal thread adopts an outer sharp corner shape structure; or the major diameter of the internal thread adopts a first groove or an arc, the minor diameter of the internal thread adopts a first plane or an arc structure for treatment, the major diameter of the external thread adopts an external sharp corner shape, and the minor diameter of the external thread adopts an internal sharp corner shape structure; or the minor diameter of the external thread adopts a second groove or arc, the major diameter of the internal thread adopts a first groove or arc structure for processing, the major diameter of the external thread adopts a second plane or arc, and the minor diameter of the internal thread adopts a first plane or arc structure for processing.

When the olive-shaped symmetrical bidirectional tapered thread connection pair is in transmission connection, a bidirectional tapered internal thread, namely a bidirectional tapered hole, is in screwing connection with a bidirectional tapered external thread, namely a bidirectional conical frustum body, and bidirectional bearing is realized, play must be formed between the bidirectional tapered external thread and the bidirectional tapered internal thread, if oil and other media are lubricated between the internal thread and the external thread, a bearing oil film is easy to form, and the play is favorable for forming the bearing oil film. According to the design of application working conditions, the bidirectional conical frustum is contained in the bidirectional conical hole in a bidirectional mode, and the bidirectional conical frustum is positioned in the radial direction, the axial direction, the angular direction, the circumferential direction and the like in multiple directions, preferably, the bidirectional conical frustum is contained in the bidirectional conical hole, the radial direction and the circumferential direction main positioning are assisted by the axial direction and the angular direction auxiliary positioning, the inner cone and the outer cone are positioned in multiple directions until the conical surface of the bidirectional conical hole is embraced with the conical surface of the bidirectional conical frustum to achieve self-positioning or until the conical surface of the bidirectional conical frustum is in interference contact with a fixed diameter to generate self-locking, a special synthesis technology of a conical pair and a thread pair is formed, and the transmission connection precision, the efficiency and the reliability of a conical thread technology, particularly a symmetrical bidirectional conical thread connection pair are guaranteed.

When the olive-shaped symmetrical two-way conical threaded connection pair is in fastening connection and sealing connection, the technical performances of connection, locking, looseness prevention, bearing, sealing and the like are realized through the screwing connection of the two-way conical hole and the two-way conical frustum body, namely, the sizing of the first spiral conical surface of the conical frustum body and the first spiral conical surface of the conical hole is realized until interference and/or the sizing of the second spiral conical surface of the conical frustum body and the second spiral conical surface of the conical hole is realized until interference, according to the application working condition, one-direction bearing and/or two-direction simultaneous bearing are realized, namely, the two-way conical frustum body and the two-way conical hole are guided by a spiral line, the inner cone and the outer cone are centered until the first spiral conical surface of the conical hole and the first spiral conical surface of the conical frustum body are clasped to achieve one-direction bearing or two-direction simultaneous bearing and sizing fit or until sizing contact is realized and/or the second spiral conical surface of the conical hole and the second spiral conical frustum body are in interference contact The conical surface is embraced to achieve one-direction bearing or two-direction simultaneous bearing sizing matching or until sizing interference contact, the bidirectional inner cone contains the bidirectional outer cone and is positioned in multiple directions such as radial direction, axial direction, angular direction and circumferential direction, preferably, the bidirectional conical hole contains the bidirectional conical frustum body, the radial direction and circumferential direction main positioning is assisted by the axial direction and angular direction auxiliary positioning, and then the multi-direction positioning of the inner cone and the outer cone is formed until the conical surface of the bidirectional conical hole is embraced to achieve self-positioning or until the sizing interference contact generates self-locking, a special synthesis technology of the conical pair and the thread pair is formed, and therefore technical performances such as mechanical mechanism connection, locking, looseness prevention, bearing and sealing are achieved.

Therefore, the technical performances of the olive-shaped symmetrical bidirectional tapered thread connection pair, such as high transmission precision efficiency, low bearing capacity, high self-locking force, high anti-loosening capacity, high sealing performance and the like, are related to the first spiral conical surface of the conical frustum, the left side conical degree formed by the first spiral conical surface, namely the first conical angle alpha 1, the second spiral conical surface of the conical frustum, the right side conical degree formed by the second spiral conical surface of the conical frustum, namely the second conical angle alpha 2, the first spiral conical surface of the conical hole, the left side conical degree formed by the first spiral conical surface of the conical hole, namely the first conical 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 second conical angle alpha 2, and the material friction coefficient, the processing quality and the application working condition of the cylindrical parent body have certain influence on the conical fit.

In the olive-like symmetrical bidirectional tapered threaded connection pair, when the right-angled trapezoid combination rotates at a constant speed for one circle, the axial movement distance of the right-angled trapezoid combination is at least one time of the length of the sum of the right-angled sides of two identical right-angled trapezoids. The structure ensures that the first spiral conical surface of the truncated cone body, the second spiral conical surface of the truncated cone body, the first spiral conical surface of the tapered hole and the second spiral conical surface of the tapered hole have enough length, thereby ensuring that the bidirectional conical surface of the truncated cone body has enough effective contact area and strength and the efficiency required by spiral motion when being matched with the bidirectional conical surface of the tapered hole.

In the olive-like symmetrical bidirectional tapered threaded connection pair, when the right-angled trapezoid combination rotates at a constant speed for one circle, the axial movement distance of the right-angled trapezoid combination is equal to the length of the sum of the right-angled sides of two identical right-angled trapezoids. The structure ensures that the first spiral conical surface of the truncated cone body, the second spiral conical surface of the truncated cone body, the first spiral conical surface of the tapered hole and the second spiral conical surface of the tapered hole have enough length, thereby ensuring that the bidirectional conical surface of the truncated cone body has enough effective contact area and strength and the efficiency required by spiral motion when being matched with the bidirectional conical surface of the tapered hole.

In the olive-like symmetrical bidirectional tapered threaded connection pair, the first spiral conical surface of the truncated cone body, the second spiral conical surface of the truncated cone body and the external spiral line are both continuous spiral surfaces or non-continuous spiral surfaces; the first spiral conical surface of the tapered hole, the second spiral conical surface of the tapered hole and the inner spiral line are both continuous spiral surfaces or discontinuous spiral surfaces. Preferably, the truncated cone first helical conical surface and the truncated cone second helical conical surface and the tapered bore first helical conical surface and the tapered bore second helical conical surface are continuous helical surfaces.

In the olive-like symmetrical bidirectional tapered threaded connection pair, 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, the contact surface of the first spiral conical surface of the conical frustum body and the first spiral conical surface of the conical hole is a bearing surface and/or interference fit and/or the contact surface of the second spiral conical surface of the conical frustum body and the second spiral conical surface of the conical hole is a bearing surface and/or interference fit, the corresponding taper direction of an included angle between two element lines of the left conical surface of the internal thread and/or the external thread, namely the first spiral conical surface, namely the first conical surface, and an included angle between two element lines of the right conical surface of the internal thread and/or the external thread, namely the second conical surface, is opposite, and the first spiral conical surface of the internal thread is in contact with the first spiral conical surface of the external thread and/or in contact with the first spiral conical surface of the internal thread and/or in interference fit and second conical surface and in contact with the first spiral conical surface of the external thread and/or in interference fit and second conical surface, and in the corresponding taper direction And/or the second spiral conical surface of the internal thread is in contact with and/or in interference fit with the second spiral conical surface of the external thread to realize the function of threaded connection.

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

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

Drawings

Fig. 1 is a schematic structural view of an olive-like symmetrical bidirectional tapered threaded connection pair according to a first embodiment of the present invention.

Fig. 2 is a schematic view of a similar olive-shaped symmetrical bidirectional tapered thread external thread and a thread structure of an external thread complete unit body according to a first embodiment of the present invention.

Fig. 3 is a schematic view of the similar olive-shaped symmetrical bidirectional tapered thread internal thread and the thread structure of the internal thread complete unit body according to the first embodiment of the present invention.

Fig. 4 is a schematic structural view of a similar olive-shaped symmetrical bidirectional tapered threaded connection pair according to a second embodiment of the present invention.

Fig. 5 is a schematic structural view of an olive-like symmetrical bidirectional taper thread connection pair according to a third embodiment of the present invention.

Fig. 6 is a schematic structural view of an olive-like symmetrical bidirectional taper thread connection pair according to the fourth embodiment of the present invention.

Fig. 7 is a schematic structural view of an olive-like symmetrical bidirectional taper thread connection pair according to the fifth embodiment of the present invention.

Fig. 8 is a diagram of "the prior art thread is a bevel on a cylindrical or conical surface" as referred to in the background of the invention.

FIG. 9 is a diagram of a "inclined plane slide block model based on the inclined plane principle, which is a principle of the prior art thread technique" related to the background of the present invention.

Fig. 10 is a view of "lead angle of prior art thread" related to the background of the invention.

In the figure, a tapered thread 1, a cylindrical parent body 2, a nut body 21, a cylindrical parent body 3, a screw body 31, a tapered hole 4, a bidirectional tapered hole 41, a bidirectional tapered hole conical surface 42, a tapered hole first helical conical surface 421, a first taper angle α 1, a tapered hole second helical conical surface 422, a second taper angle α 2, an internal spiral 5, an internal thread 6, a first groove or arc 61, a first plane or arc 62, a truncated cone 7, a bidirectional truncated cone 71, a bidirectional truncated cone conical surface 72, a truncated cone first helical conical surface 721, a first taper angle α 1, a truncated cone second helical conical surface 722, a second taper angle α 2, an external spiral 8, an external thread 9, a second groove or arc 91, a second plane or arc 92, a olive-like shape 93, a left side taper 95, a right side taper 96, a left side distribution 97, a right side distribution 98, a thread connection pair and/or a thread pair 10, Play 101, taper axis 01, thread axis 02, slider on ramp a, ramp B, gravity G, gravity along ramp component G1, friction force F, lead angle phi, equivalent friction angle P, conventional external thread major diameter d, conventional external thread minor diameter d1, and conventional external thread minor diameter d 2.

Detailed Description

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

Example one

As shown in fig. 1, 2 and 3, the olive-shaped symmetrical bidirectional tapered threaded connection pair includes a bidirectional frustum 71 spirally distributed on the outer surface of the cylindrical parent body 3 and a bidirectional tapered hole 41 spirally distributed on the inner surface of the cylindrical parent body 2, that is, the connection pair includes an external thread 9 and an internal thread 6 which are in threaded fit with each other, the internal thread 6 is distributed with the bidirectional tapered hole 41 spirally and exists in a non-solid space form, the external thread 9 is distributed with the bidirectional frustum 71 spirally and exists in a material solid form, and the internal thread 6 and the external thread 9 are the relationship between the containing piece and the contained piece: the internal thread 6 and the external thread 9 are a section of bidirectional conical geometric body which is screwed and sleeved together and are clasped until interference fit, namely, the bidirectional conical hole 41 contains the bidirectional conical frustum 71 section by section, the two-way containing limits the disordered freedom degree between the conical hole 4 and the conical frustum 7, the screw motion enables the symmetrical bidirectional conical threaded connection pair 10 to obtain the necessary ordered freedom degree, and the technical characteristics of the conical pair and the threaded pair are effectively synthesized.

The olive-like symmetrical bidirectional tapered threaded connection pair in this embodiment has the bidirectional truncated cone conical surface 72 and the bidirectional tapered bore conical surface 42 cooperating with each other when in use.

In the embodiment, the truncated cone body 7 and/or the tapered hole 4 of the olive-like symmetrical bidirectional tapered threaded connection pair reach a certain taper, that is, the cone forming the conical pair reaches a certain taper angle, the symmetrical bidirectional tapered threaded connection pair 10 has self-locking and self-positioning properties, the taper includes a left taper 95 and a right taper 96, the taper includes a left taper and a right taper, the left taper 95 corresponds to a left taper, that is, a first taper angle α 1, preferably, the first taper angle α 1 is greater than 0 ° and less than 53 °, and preferably, the first taper angle α 1 takes a value of 2 ° to 40 °; 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 larger than 0 degrees and smaller than 53 degrees, and preferably, the second taper angle alpha 2 is 2-40 degrees. In particular, in connection applications in which self-locking and/or positioning requirements are low and/or axial load-bearing requirements are not required, it is preferred that the first taper angle α 1 is less than 180 ° and the second taper angle α 2 is less than 180 ° and is less than 53 °.

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

The symmetrical two-way frustum cone 71 in the olive-like shape 93 is characterized in that the symmetrical two-way frustum cone 71 is formed by symmetrically and oppositely jointing the lower bottom surfaces of two identical frustum cones, the upper top surfaces of the two symmetrical frustum cone 71 are positioned at two ends of the two-way frustum cone and form the symmetrical two-way tapered thread 1 in the olive-like shape 93, the symmetrical two-way frustum cone 72 is respectively jointed with the upper top surfaces of the two adjacent two-way frustum cone 71 and/or is respectively jointed with the upper top surfaces of the two adjacent two-way frustum cone 71, the outer surface of the frustum cone 7 is provided with the symmetrical two-way frustum cone 72, the external thread 9 comprises a first spiral cone 721 of the frustum cone, a second spiral cone 722 of the frustum cone and an external spiral line 8, in a section passing through a thread axis 02, the complete single-section symmetrical two-way tapered external thread 9 is a special two-way tapered geometric body which is large in the middle, small in two ends and has the same left-side taper and the right-side taper and/or is similar to the same to the olive-like shape 93, the included angle between two element lines of the left side conical surface of the symmetrical bidirectional cone frustum 71, namely the first spiral conical surface 721 of the cone frustum is a first cone angle alpha 1, the left side conical degree 95 formed by the first spiral conical surface 721 of the cone frustum is corresponding to the first cone angle alpha 1 and is distributed in the left direction 97, the included angle between two element lines of the right side conical surface of the symmetrical bidirectional cone frustum 71, namely the second spiral conical surface 722 of the cone frustum is a second cone angle alpha 2, the right side conical degree 96 formed by the second spiral conical surface 722 of the cone frustum is corresponding to the second cone angle alpha 2 and is distributed in the right direction 98, the corresponding conical directions of the first cone angle alpha 1 and the second cone angle alpha 2 are opposite, the element lines are the intersection lines of the conical surface and a plane passing through the cone axis 01, the shape formed by the first spiral conical surface 721 of the cone frustum 71 and the second spiral conical surface 722 of the cone frustum is the same as the central axes of two right-angle trapezoids which are overlapped with the cylindrical parent body 3 The right-angle sides of the right-angle trapezoid combination bodies with symmetrical lower bottom edges and oppositely jointed are the special geometric bodies with the same lower bottom edges symmetrically and oppositely jointed and the upper bottom edges are respectively positioned at the two ends of the right-angle trapezoid combination bodies.

The internal thread 6 is arranged on the inner surface of the cylindrical parent body 2, and is characterized in that the cylindrical parent body 2 is provided with a nut body 21, the inner surface of the nut body 21 is provided with tapered holes 4 which are distributed spirally, the tapered holes 4 comprise symmetrical bidirectional tapered holes 41, the symmetrical bidirectional tapered holes 41 are special bidirectional tapered geometric bodies which are similar to olive-shaped 93, and the cylindrical parent body 2 comprises a cylinder body and/or a non-cylinder body and other workpieces and objects which need to be processed with internal threads on the inner surface.

The olive-like 93 symmetrical bidirectional tapered hole 41 is characterized in that the olive-like 93 symmetrical bidirectional tapered hole is formed by symmetrically and oppositely jointing the lower bottom surfaces of two identical tapered holes, the upper top surfaces of the two identical tapered holes are positioned at two ends of the bidirectional tapered hole 41, and when the olive-like 93 symmetrical bidirectional tapered thread 1 is formed, the olive-like 93 symmetrical bidirectional tapered thread comprises the step of respectively jointing the upper top surfaces of the two adjacent bidirectional tapered holes 41 and/or the step of respectively jointing the upper top surfaces of the two adjacent bidirectional tapered holes 41, the tapered hole 4 comprises the symmetrical bidirectional tapered hole conical surface 42, the internal thread 6 comprises a tapered hole first spiral conical surface 421, a tapered hole second spiral conical surface 421 and an internal spiral line 5, in a section passing through a thread axis 02, the complete single-section symmetrical bidirectional tapered internal thread 6 is a special bidirectional tapered geometry which is in the middle part large, in the two ends small, and has the same left-side taper and/or is approximately the same as the right-side taper, the included angle formed by two plain lines of the left side conical surface of the bidirectional tapered hole 41, namely the first spiral conical surface 421 of the tapered hole, is a first taper angle alpha 1, the left side conical degree 95 formed by the first spiral conical surface 421 of the tapered hole corresponds to the first taper angle alpha 1 and is distributed in the left direction 97, the included angle formed by two plain lines of the right side conical surface of the bidirectional tapered hole 41, namely the second spiral conical surface 422 of the tapered hole, is a second taper angle alpha 2, the right side conical degree 96 formed by the second spiral conical surface 422 of the tapered hole corresponds to the second taper angle alpha 2 and is distributed in the right direction 98, the corresponding taper directions of the first taper angle alpha 1 and the second taper angle alpha 2 are opposite, the plain lines are intersection lines of the conical surfaces and a plane passing through the conical axis 01, and the shapes formed by the first spiral conical surface 421 of the tapered hole and the second spiral conical surface 422 of the bidirectional tapered hole 41 and the lower portions of two right-angle trapezoids with the same bottom line coincident with the central axis of the tubular parent body 2 are symmetrical and are oppositely jointed The right-angle trapezoidal combination body is a special geometric body, the lower bottom edges of the two same right-angle trapezoids are symmetrically and oppositely jointed, and the upper bottom edges of the two same right-angle trapezoids are respectively positioned at two ends of the right-angle trapezoidal combination body.

In the olive-like symmetrical bidirectional tapered thread connection pair in the embodiment, the joint of the adjacent spiral conical surfaces of the external thread 9 and the internal thread 6 adopts a sharp-angle connection mode, and the sharp angle is a structural mode without specially performing non-sharp-angle treatment in terms of relative non-sharp angles.

The two-way truncated cone 71 and the two-way taper hole 41 which are similar to olive-shaped 93 are characterized in that the large diameter of the external thread 9 between the joint of the first spiral conical surface 721 of the truncated cone of the two-way truncated cone 71 and the second spiral conical surface 722 of the truncated cone adopts an external sharp angle shape structure to be connected and form an external spiral line 8 which is distributed in a spiral shape, the small diameter of the external thread 9 between the joint of the first spiral conical surface 721 of the truncated cone of the same spiral bidirectional truncated cone 71 and the second spiral conical surface 722 of the truncated cone of the adjacent bidirectional truncated cone 71 and/or between the joint of the second spiral conical surface 722 of the truncated cone of the same spiral bidirectional truncated cone 71 and the first spiral conical surface 721 of the truncated cone of the adjacent bidirectional truncated cone 71 is connected by adopting an internal sharp angle structure and forms an external spiral line 8 which is distributed spirally; the inner spiral 5 is formed by connecting the first spiral conical surface 421 of the conical hole of the two-way conical hole 41 with the second spiral conical surface 422 of the conical hole of the same spiral, namely the major diameter of the inner thread 6, by adopting the shape of an inner sharp corner, the inner spiral 5 is formed by connecting the first spiral conical surface 421 of the conical hole of the two-way conical hole 41 with the second spiral conical surface 422 of the adjacent two-way conical hole 41, and/or the inner thread 6 is formed by connecting the second spiral conical surface 421 of the conical hole of the two-way conical hole 41 with the first spiral conical surface 421 of the conical hole of the adjacent two-way conical hole 41, namely the minor diameter of the inner thread 6, by adopting the structure of an outer sharp corner, the inner spiral 5 is formed by connecting, the conical thread 1 has more compact structure, higher strength, large bearing value and good mechanical connection, locking and sealing performance, the processing physical space is more spacious.

In the transmission connection of the olive-like symmetrical bidirectional tapered threaded connection pair in the embodiment, the bidirectional tapered hole 41 is in screwing connection with the bidirectional frustum 71, bidirectional bearing is performed, when the external thread 9 and the internal thread 6 form the thread pair 10, and the internal thread 6 and the external thread 9 must have a clearance 101, that is, the bidirectional frustum 71 and the bidirectional tapered hole 41 must have a clearance 101, if oil and other media are lubricated between the internal thread 6 and the external thread 9, a bearing oil film is easily formed, the clearance 101 is favorable for forming the bearing oil film, the symmetrical bidirectional tapered threaded connection pair 10 is equivalent to a group of sliding bearing pairs consisting of a pair of sliding bearings and/or a plurality of sliding bearings, that is, each section of bidirectional tapered internal thread 6 bidirectionally accommodates a corresponding section of bidirectional tapered external thread 9 to form a pair of sliding bearings, and the number of the sliding bearings is adjusted according to application conditions, the bidirectional conical internal thread 6 and the bidirectional conical external thread 9 are effectively jointed to form the number of contained and contained thread joints, the bidirectional internal cone 6 contains the bidirectional external cone 9 and is positioned in multiple directions such as radial, axial, angular, circumferential and the like according to the design of application working conditions, a special synthesis technology of a cone pair and a thread pair is formed, and the precision, the efficiency and the reliability of transmission connection of a conical thread technology, particularly an olive-like symmetrical bidirectional conical thread connection pair 10 are ensured.

In the embodiment, when the olive-like symmetrical bidirectional conical threaded connection pair is fastened and connected in a sealing manner, the technical performances of connection, locking, looseness prevention, bearing, fatigue, sealing and the like are realized through the screwing connection of the bidirectional tapered hole 41 and the bidirectional conical frustum body 71, namely the first spiral conical surface 721 of the conical frustum body and the first spiral conical surface 421 of the tapered hole are sized until interference is caused and/or the second spiral conical surface 722 of the conical frustum body and the second spiral conical surface 422 are sized until interference is caused, according to the application working condition, bearing in one direction and/or bearing in two directions are realized simultaneously and respectively, namely the inner cone and the outer cone are centered under the guidance of a spiral line of the bidirectional conical frustum body 71 and the bidirectional tapered hole 41 until the first spiral conical surface 421 of the conical hole and the outer cone are engaged until interference contact is caused and/or the second spiral conical surface 422 of the conical hole and the second spiral conical surface 722 of the conical frustum body are engaged until interference contact is caused and/or the second spiral conical surface 721 of the conical frustum body and the second spiral conical surface 71 are engaged And the mechanical fastening mechanism is combined until interference contact is achieved, so that the technical performances of the mechanical fastening mechanism, such as connection performance, locking performance, anti-loosening performance, bearing performance, fatigue performance, sealing performance and the like, are realized.

Therefore, the technical performance of the transmission precision, the transmission efficiency, the bearing capacity, the self-locking force, the anti-loosening capacity, the sealing performance, the reusability and the like of the olive-like symmetrical bidirectional tapered threaded connection pair in the embodiment are related to the sizes of the first helical conical surface 721 of the truncated cone, the left-side taper 95 formed by the first conical surface α 1, the second helical conical surface 722 of the truncated cone, the right-side taper 96 formed by the second conical surface α 2, the first helical conical surface 421 of the tapered hole, the left-side taper 95 formed by the first conical surface 95, the first conical angle α 1, the second helical conical surface 422 of the tapered hole, and the right-side taper 96 formed by the second conical surface 96 of the tapered hole α 2. 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.

In the olive-like symmetrical bidirectional tapered threaded connection pair, when the right-angled trapezoid combination rotates at a constant speed for one circle, the axial movement distance of the right-angled trapezoid combination is at least one time of the length of the sum of the right-angled sides of two identical right-angled trapezoids. This structure ensures that the frustum-conical body first helical conical surface 721 and the frustum-conical body second helical conical surface 722, and the tapered bore first helical conical surface 421 and the tapered bore second helical conical surface 422 have sufficient lengths, thereby ensuring that the bidirectional frustum-conical body conical surface 72 has sufficient effective contact area and strength when mated with the bidirectional tapered bore conical surface 42, and efficiency required for helical motion.

In the olive-like symmetrical bidirectional tapered threaded connection pair, when the right-angled trapezoid combination rotates at a constant speed for one circle, the axial movement distance of the right-angled trapezoid combination is equal to the length of the sum of the right-angled sides of two identical right-angled trapezoids. This structure ensures that the frustum-conical body first helical conical surface 721 and the frustum-conical body second helical conical surface 722, and the tapered bore first helical conical surface 421 and the tapered bore second helical conical surface 422 have sufficient lengths, thereby ensuring that the bidirectional frustum-conical body conical surface 72 has sufficient effective contact area and strength when mated with the bidirectional tapered bore conical surface 42, and efficiency required for helical motion.

In the above-mentioned olive-like symmetrical bidirectional tapered thread connection pair, the first helical conical surface 721 and the second helical conical surface 722 are both continuous helical surfaces or non-continuous helical surfaces; the first conical hole surface 421 and the second conical hole surface 422 are both continuous helical surfaces or non-continuous helical surfaces. Preferably, the truncated cone first helical conical surface 721 and the truncated cone second helical conical surface 722, and the tapered bore first helical conical surface 421 and the tapered bore second helical conical surface 422 are continuous helical surfaces.

In the olive-like symmetrical bidirectional tapered threaded connection pair, one end and/or two ends of the cylindrical parent body 3 can be screwed-in ends screwed into the connecting holes of the cylindrical parent body 2.

In the olive-like symmetrical bidirectional tapered threaded connection pair, a head with a size larger than the outer diameter of the columnar parent body 3 is arranged at one end of the columnar parent body 3 and/or a head with a small diameter smaller than the bidirectional tapered external thread 9 of the screw body 31 of the columnar parent body 3 is arranged at one end or two ends of the columnar parent body 3, and the connection hole is a threaded hole arranged on the nut 21. That is, the connection between the columnar parent body 3 and the head is a bolt, the bolt has no head and/or the head at both ends is smaller than the small diameter of the bidirectional tapered external thread 9 and/or the bolt has no middle thread and both ends are respectively provided with the bidirectional tapered external thread 9, and the connecting hole is arranged in the nut 21.

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

Example two

As shown in fig. 4, the structure, principle and implementation steps of the present embodiment are similar to those of the present embodiment, except that the small diameter of the external thread 9, i.e. the joint of the adjacent spiral conical surfaces, is processed by an external spiral structure connected by a second groove or arc 91, the external spiral structure is a special external spiral line 8, the large diameter of the internal thread 6 is processed by an internal spiral structure connected by a first groove or arc 61, and the internal spiral structure is a special internal spiral line 5, so that interference generated when the internal thread 6 is screwed with the external thread 9 can be avoided, and oil and dirt can be stored.

EXAMPLE III

As shown in fig. 5, the structure, principle and implementation steps of the present embodiment are similar to those of the present embodiment, except that the major diameter of the external thread 9 is processed by an external thread structure connected with a second plane or an arc 92, the external thread structure is a special external thread 8, the minor diameter of the internal thread 6, i.e. the joint of adjacent spiral conical surfaces, is processed by an internal thread structure connected with a first plane or an arc 62, and the internal thread structure is a special internal spiral 5, so that interference generated when the internal thread 6 is screwed with the external thread 9 can be avoided, and oil and dirt can be stored.

Example four

As shown in fig. 6, the structure, principle and implementation steps of the present embodiment are similar to those of the present embodiment, and the difference is that the small diameter of the external thread 9, i.e. the joint of the adjacent spiral conical surfaces, is processed by an external thread structure connected by a second groove or arc 91, the large diameter of the external thread 9 is processed by an external thread structure connected by a second plane or arc 92, the external thread structure is a special external thread 8, and the large diameter and the small diameter of the internal thread 6 forming the thread pair 10 are connected by a sharp corner, so that the possible R-angle of the internal thread 6 forming the thread pair 10 can be avoided, the interference generated when the internal thread 6 is screwed with the external thread 9 can be avoided, and the oil and dirt can be stored.

EXAMPLE five

As shown in fig. 7, the structure, principle and implementation steps of the present embodiment are similar to those of the present embodiment, and the difference is that the major diameter of the internal thread 6 is processed by an internal spiral structure connected by a first groove or arc 61, the minor diameter of the internal thread 6, that is, the joint of adjacent spiral conical surfaces, is processed by an internal spiral structure connected by a first plane or arc 62, the internal spiral structure is a special internal spiral line 5, and the major diameter and minor diameter of the external thread 9 forming the thread pair 10 are connected by a sharp corner, so that the possible R-angle of the forming thread pair 10 can be avoided, the interference generated when the internal thread 6 and the external thread 9 are screwed together can be avoided, and the oil and dirt can be stored.

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

Although tapered thread 1, cylindrical parent body 2, nut body 21, cylindrical parent body 3, bolt body 31, tapered bore 4, bi-directional tapered bore 41, bi-directional tapered bore conical surface 42, tapered bore first helical conical surface 421, first taper angle α 1, tapered bore second helical conical surface 422, second taper angle α 2, internal spiral 5, internal thread 6, first groove or arc 61, first plane or arc 62, frustum 7, bi-directional frustum 71, bi-directional frustum conical surface 72, frustum first helical conical surface 721, first taper angle α 1, frustum second helical conical surface 722, second taper angle α 2, external spiral 8, external thread 9, second groove or arc 91, second plane or arc 92, olive-like 93, left side taper 95, right side taper 96, left side distribution 97, right side distribution 98, thread connection pair and/or thread pair 10 are more used herein, either alone or in combination with either or both, Play 101, self-locking force, self-locking, self-positioning, pressure, cone axis 01, thread axis 02, mirror image, bushing, shaft, non-solid space, material solid, single cone, double cone, inner cone, taper hole, outer cone, cone pair, helical structure, helical motion, thread body, complete unit body thread, axial force angle, counter axial force angle, centripetal force, counter-positive force, reverse collinearity, internal stress, bi-directional force, uni-directional force, plain bearing pair, etc., but does not exclude the possibility of using other terms, which are used merely to more conveniently describe and explain the essence of the invention, and they are to be interpreted that any additional limitation is contrary to the spirit of the invention.

Claims (11)

1. An olive-like symmetrical bidirectional tapered threaded connection pair comprises an external thread (9) and an internal thread (6) which are in threaded fit with each other, and is characterized in that the complete unit body thread of the olive-like symmetrical bidirectional tapered thread (1) is a spiral olive-like symmetrical bidirectional conical body (93) with a large middle part and two small ends, and comprises a bidirectional conical hole (41) and a bidirectional conical table body (71), the internal thread (6) is a cylindrical parent body (2) with a spiral bidirectional conical hole (41) on the inner surface, the external thread (9) is a cylindrical parent body (3) with a spiral bidirectional conical table body (71) on the outer surface, the left side conical surface of the olive-like symmetrical bidirectional conical body (93) forms a left side conical surface (95) corresponding to a first conical angle alpha 1, the right side conical surface forms a right side conical surface (96) corresponding to a second conical angle alpha 2, the left side taper (95) and the right side taper (96) are opposite in direction and have the same or approximately the same taper, the internal thread (6) and the external thread (9) contain the taper through the taper hole until the internal taper and the external taper are mutually loaded, wherein the first taper angle alpha 1 is more than 0 degree and less than 53 degrees, and the second taper angle alpha 2 is more than 0 degree and less than 53 degrees; or the first taper angle alpha 1 is larger than or equal to 53 degrees and smaller than 180 degrees, and the second taper angle alpha 2 is larger than or equal to 53 degrees and smaller than 180 degrees.

2. The olive-like symmetrical bi-directional tapered threaded connection of claim 1, the internal thread (6) comprises a left side conical surface, namely a first conical hole spiral conical surface (421), a right side conical surface, namely a second conical hole spiral conical surface (422) and an internal spiral line (5) of the bidirectional conical hole conical surface (42), and the first conical hole conical surface (421) and the second conical hole conical surface (422), namely the bidirectional spiral conical surface form shapes, the right-angle sides of a right-angle trapezoid combination body which is symmetrical and oppositely jointed with the lower bottom edges of two same right-angle trapezoids superposed on the central axis of the cylindrical parent body (2) are taken as the rotation center, the rotation is carried out at a uniform speed in the circumferential direction, the right-angle trapezoid combination body simultaneously moves axially at a uniform speed along the central axis of the cylindrical parent body (2), the spiral outer side surfaces of the revolution bodies formed by the two bevel edges of the right-angle trapezoidal combination bodies have the same shape; the external thread (9) comprises a left side conical surface, namely a first spiral conical surface (721) of the conical frustum body, a right side conical surface, namely a second spiral conical surface (722) of the conical frustum body, and an external spiral line (8) of the conical frustum body conical surface (72), the first spiral conical surface (721) of the conical frustum body and the second spiral conical surface (722) of the conical frustum body are in a shape formed by the two spiral conical surfaces, the right-angle sides of the right-angle trapezoidal bodies are symmetrical and oppositely jointed with the lower bottom edges of the same two right-angle trapezoids superposed on the central axis of the columnar parent body (3) and are used as rotation centers, the rotation is carried out in the circumferential direction at a constant speed, the right-angle trapezoidal bodies simultaneously move axially along the central axis of the columnar parent body (3) at a constant speed, and the shape of the outer spiral side surface of the revolution body formed by the two inclined sides of the right-angle trapezoidal bodies is the same.

3. The olive-like symmetrical bidirectional tapered threaded connection pair as claimed in claim 2, wherein the distance of axial movement of the right-angled trapezoidal combination when the right-angled trapezoidal combination rotates at a constant speed for one revolution is at least one time as long as the sum of the two right-angled sides of the right-angled trapezoidal combination.

4. The olive-like symmetrical bidirectional tapered threaded connection pair as claimed in claim 2, wherein the axial movement distance of the right-angled trapezoidal combination is equal to the sum of the two right-angled sides of the right-angled trapezoidal combination when the right-angled trapezoidal combination rotates at a constant speed for one revolution.

5. The olivary-like symmetric bi-directional tapered thread coupling set as claimed in claim 2, wherein the left and right side tapered surfaces of the olivary-like (93) symmetric bi-directional tapered cone, i.e. the first tapered hole helical conical surface (421) and the second tapered hole helical conical surface (422) and the internal spiral (5), are continuous helical surfaces or non-continuous helical surfaces, and the first truncated cone helical conical surface (721), the second truncated cone helical conical surface (722) and the external spiral (8) are continuous helical surfaces or non-continuous helical surfaces.

6. The olive-like symmetrical two-way tapered threaded connection pair according to claim 1, wherein the internal threads (6) are formed by symmetrically and oppositely engaging the lower bottom surfaces of the same two tapered holes (4), and the upper top surfaces are located at the two ends of the two-way tapered holes (41), and when the olive-like symmetrical two-way tapered threads (1) are formed, the internal threads comprise the olive-like (93) symmetrical two-way tapered threads which are respectively engaged with the upper top surfaces of the adjacent two-way tapered holes (41) and/or not engaged with the upper top surfaces of the adjacent two-way tapered holes (41), the external threads (9) are formed by symmetrically and oppositely engaging the lower bottom surfaces of the same two frustum cones (7), and the upper top surfaces are located at the two ends of the frustum cones (71), and when the olive-like symmetrical two-way tapered threads (1) are formed, comprises a screw thread which is spirally formed into a olive-like (93) symmetrical bidirectional taper thread external thread and is mutually jointed with the upper top surface of the adjacent bidirectional frustum body (71) and/or is not mutually jointed with the upper top surface of the adjacent bidirectional frustum body (71).

7. The olive-like symmetrical bidirectional tapered threaded connection pair according to claim 1, characterized by comprising an external thread (9) with a major diameter adopting an external sharp-corner-shaped structure, an external thread (9) with a minor diameter adopting an internal sharp-corner-shaped structure, an internal thread (6) with a major diameter adopting an internal sharp-corner-shaped structure, and an internal thread (6) with a minor diameter adopting an external sharp-corner-shaped structure; or the small diameter of the external thread (9) adopts a second groove or arc (91), the large diameter of the internal thread (6) adopts a first groove or arc (61) structure treatment, and the large diameter of the external thread (9) and the small diameter of the internal thread (6) keep a sharp-angled structure; or the major diameter of the external thread (9) adopts a second plane or an arc (92), the minor diameter of the internal thread (6) adopts a first plane or an arc (62) for structural treatment, and the minor diameter of the external thread (9) and the major diameter of the internal thread (6) keep a sharp-angled structure; or the major diameter of the external thread (9) adopts a second plane or an arc (92), the minor diameter of the external thread (9) adopts a second groove or an arc (91) for structural treatment, the major diameter of the internal thread (6) adopts an inner sharp corner shape, and the minor diameter of the internal thread (6) adopts an outer sharp corner shape; or the major diameter of the internal thread adopts a first groove or arc (61), the minor diameter of the internal thread adopts a first plane or arc (62) for structural treatment, the major diameter of the external thread (9) adopts an external sharp corner shape, and the minor diameter of the external thread (9) adopts an internal sharp corner shape; or the minor diameter of the external thread (9) adopts a second groove or arc (91), the major diameter of the internal thread (6) adopts a first groove or arc (61) structure treatment, the major diameter of the external thread (9) adopts a second plane or arc (92), and the minor diameter of the internal thread (6) adopts a first plane or arc (62) structure treatment.

8. The olive-like symmetrical two-way tapered threaded connection pair according to claim 1, wherein the internal thread (6) and the external thread (9) form a threaded connection pair (10), the threaded connection pair (10) is formed by mutually sizing and matching a spiral two-way tapered hole (41) and a spiral two-way frustum body (71) under the guidance of a spiral line, a clearance (101) is formed between the two-way frustum body (71) and the two-way tapered hole (41), and each section of the internal thread (6) and the external thread (9) comprises one side bearing and/or both sides bearing simultaneously.

9. The olive-like symmetrical two-way tapered threaded connection pair according to claim 1, wherein the threaded connection pair (10) consisting of the internal thread (6) and the external thread (9) is formed by a first conical hole spiral conical surface (421) and a second conical hole spiral conical surface (422) and a first truncated cone spiral conical surface (721) and a second truncated cone spiral conical surface (722) which are matched with each other, and the threaded connection pair is supported by taking a contact surface as a supporting surface, or the internal diameter and the external diameter of the internal cone and the external cone are centered under the guidance of a spiral line until the two-way conical hole conical surface (42) and the two-way truncated cone conical surface (72) are in self-positioning contact or self-locking.

10. The olive-like symmetrical bi-directional tapered thread coupling as claimed in claim 1 wherein said cylindrical parent body (3) is solid or hollow and comprises cylindrical and/or non-cylindrical workpieces or objects requiring external threads (9) on their outer surfaces, said cylindrical parent body (2) comprises cylindrical and/or non-cylindrical workpieces or objects requiring internal threads (6) on their inner surfaces, said outer and/or inner surfaces comprise cylindrical and/or non-cylindrical geometries including tapered surfaces.

11. The olivary-like symmetrical bi-directional tapered thread joint as set forth in claim 1 wherein said internal (6) and/or external (9) threads comprise a single-part thread with incomplete tapered geometry, i.e. the single-part thread is an incomplete single-part thread.

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