CN213744403U - Bolt and nut connecting structure of olive-like asymmetric bidirectional tapered threads - Google Patents

Abstract

The utility model belongs to the technical field of equipment is general, a kind of bolt and nut connection structure of asymmetric two-way toper screw thread of olive form is related to, 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 of column parent (3) surface (71) (material entity), complete cell cube screw thread all is that left side tapering (95) are greater than and/or be less than the type of olive form (93) two-way cone that is big and both ends are little in the middle of the heliciform of right side tapering (96), the performance mainly depends on flank of thread and tapering size, 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

Bolt and nut connecting structure of olive-like asymmetric bidirectional tapered threads

Technical Field

The utility model belongs to the technical field of equipment is general, especially, relate to a kind of bolt and nut connection structure of olive-shaped asymmetric two-way taper thread (hereinafter referred to as "bolt and nut of two-way taper thread").

Background

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

Modern threads began in 1841 as uk hui threads. According to the modern thread technical theory, the basic conditions of thread self-locking are as follows: the equivalent friction angle must not be less than the helix angle. The thread is a recognition of the modern thread technology based on the technical principle of the modern thread, namely the inclined plane principle, and becomes an important theoretical basis of the modern thread technology. The first theoretical explanation of the slope principle was steve, who studied the parallelogram law of the equilibrium of the object on the slope and the resultant of forces, he proposed the famous slope law in 1586: the gravity force in the direction of the inclined plane on an object placed on the inclined plane is proportional to the sine of the inclination angle. The inclined plane is a smooth plane inclined with the horizontal plane, the screw is the deformation of the inclined plane, the thread is like the inclined plane wrapped outside the cylinder, the more gentle the inclined plane is, the greater the mechanical benefit is (see fig. 14) (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 15) 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. 16), also known as the lead angle of the thread, is the angle between the tangent to the helix on the pitch diameter cylinder and the plane perpendicular to the axis of the thread, which affects the self-locking and anti-loosening of the thread. The equivalent friction angle is the friction angle corresponding to the final transformation of the different friction forms into the most common bevel slider form. In general, in an inclined plane slider model, when an inclined plane inclines to a certain angle, the friction force of the slider at the moment is just equal to the component of gravity along the inclined plane, the object is just in a stress balance state at the moment, and the inclined plane inclination angle at the moment is called as an equivalent friction angle.

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

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

Disclosure of Invention

Any technical theory, with theoretical assumptions background, threads are no exception. Along with 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 taper thread's bolt and nut connection structure.

In order to achieve the above purpose, the utility model adopts the following technical proposal: the bolt and the nut of the bidirectional tapered thread form a threaded connection pair by an asymmetric bidirectional tapered thread internal thread and an asymmetric bidirectional tapered thread external thread for use, and are special thread pair technology for synthesizing technical characteristics of a conical pair and a spiral motion, the bidirectional tapered thread is a thread technology for synthesizing technical characteristics of a bidirectional conical body and a spiral structure, the bidirectional conical body consists of two single conical bodies, namely two single conical bodies with opposite left-side conicity and right-side conicity directions and different conicities are bidirectionally formed, the bidirectional conical body is spirally distributed on the outer surface of a cylindrical parent body to form an external thread and/or the bidirectional conical body is spirally distributed on the inner surface of the cylindrical parent body to form an internal thread, and the complete unit body thread is spiral and has a middle big two ends including a left-side conicity larger than the right-side conicity and/or a left-side conicity smaller than the right-side conicity Olive-like asymmetric special bidirectional conical geometry.

This two-way tapered thread's bolt and nut, the asymmetric two-way tapered thread of class olive form include that left side tapering is greater than right side tapering and left side tapering is less than two kinds of forms of right side tapering, its definition can be expressed as: the novel olive-shaped bidirectional tapered hole is characterized in that an asymmetric bidirectional tapered hole (or an asymmetric bidirectional tapered frustum) which specifies left-side taper and right-side taper, has opposite left-side taper and right-side taper directions and has different tapers is arranged on the surface of a cylinder or a cone, and a special olive-shaped bidirectional tapered geometric body which is continuously and/or discontinuously distributed along a spiral line and has a large middle and small ends. "for manufacturing reasons, the thread head and the thread tail of the asymmetric bidirectional tapered thread may be incomplete bidirectional tapered geometry. The mutual thread matching is changed from the meshing relationship of the internal thread and the external thread of the modern thread into the embracing relationship of the internal thread and the external thread of the bidirectional conical thread.

This bolt and nut of two-way toper screw thread, including being the spiral helicine distribution in the two-way frustum body of column parent surface and being the spiral helicine distribution in the two-way bell mouth of tube-shape parent internal surface, including screw-thread fit's external screw thread and internal thread each other promptly, the internal thread exists in order to be the two-way bell mouth of spiral helicine and with "non-entity space" form, the external screw thread exists in order to be the two-way frustum body of spiral helicine and 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 internal thread is a bidirectional taper hole, and the external thread is a bidirectional cone frustum body, wherein the bidirectional taper hole and the external thread are one-section two-way taper geometric body, the two-way taper geometric bodies are wrapped, sleeved and sleeved together and are embraced until one-side two-way bearing or left side and right side two-way bearing or sizing interference fit, whether two sides are simultaneously carried and are related to the actual working condition of the application field, namely the bidirectional taper hole is wrapped one-section one-way and embraced and embrace the bidirectional cone frustum body, and the internal thread is one-section embrace and correspond to the external thread.

The screw thread connection pair is a non-tooth thread 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 screw thread connection pair is formed between the bidirectional conical threads, a 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, so that the connection technical performance is realized, and the self-locking property, the self-positioning property, the reusability, the fatigue resistance and other capabilities of the screw thread pair mainly depend on the conical surface of the conical pair of the bolt and nut connection structure forming the bidirectional conical thread and the taper size thereof, namely the conical surface of the inner thread and the taper size of the outer thread.

The bolt and the nut of the bidirectional tapered thread have the advantages that the thread body, namely the bidirectional conical body, is distributed on any one side of the left side or the right side, the section of the single conical body is formed by two plain lines of a cone in a bidirectional way through a conical axis, namely the bidirectional state, the plain line is the intersection line of the conical surface and a plane passing through the conical axis, the cone principle of the bolt and nut connecting structure of the bidirectional tapered thread represents an axial force and a counter axial force, the axial force and the counter axial force are synthesized by the bidirectional force, the axial force and the corresponding counter axial force are opposite, the internal thread and the external thread are in a cohesive relation, namely, a thread pair is formed by utilizing the internal thread to clasp the external thread, namely a cone (outer cone) corresponding to a cone (cohesive) to a cohesive sizing matching to realize self-positioning or self-locking until the cohesive sizing interference contact is realized, 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 force angle and/or the anti-axial force angle are less than 180 degrees and more than 127 degrees, the conical pair is in a strong self-positioning state, strong self-positioning of the inner and outer cones is easily achieved, when the axial force angle and/or the anti-axial force angle are infinitely close to 180 degrees, the self-positioning capability of the inner and outer cones of the conical pair is strongest, the axial force angle and/or the anti-axial force angle are equal to or less than 127 degrees and more than 0 degrees, the conical pair is in a weak self-positioning state, the axial force angle and/or the anti-axial force angle tend to change towards the direction infinitely close to 0 degrees, and the self-positioning capability of the inner and outer cones of the conical pair changes in the direction of attenuation trend until the inner and outer cones completely do not have the self-positioning capability.

Compared with the contained and contained relation that the single-cone unidirectional tapered thread of the single cone can only bear the load of the single side of the conical surface, the contained relation of the irreversible single-side bidirectional contained relation is realized, the reversible left and right bidirectional contained relation of the bidirectional tapered thread of the double cone can realize the respective bearing of the left side of the conical surface and/or the right side of the conical surface and/or the bidirectional simultaneous bearing of the right side of the left side of the conical surface, the disordered freedom degree between the conical hole and the cone frustum is further limited, the screw motion can ensure that the bolt and nut connecting structure of the bidirectional tapered thread obtains the necessary ordered freedom degree, and the technical characteristics of the conical pair and the thread pair are effectively synthesized to form a brand new thread technology.

When the bolt and the nut with the bidirectional conical threads are used, the conical surface of the bidirectional conical frustum of the external threads of the bidirectional conical threads is matched with the conical surface of the bidirectional conical hole of the internal threads of the bidirectional conical threads.

The bidirectional tapered threaded bolt and nut has the advantages that the bidirectional cone of the conical pair, namely the conical frustum and/or the conical hole, can realize self-locking and/or self-positioning of the threaded connection pair without any taper or any taper angle, the inner cone and the outer cone have to reach a certain taper or a certain taper angle, the bidirectional tapered threaded bolt and nut connection structure has self-locking and self-positioning performance, 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 angle, namely a first taper angle alpha 1, the right taper corresponds to the right taper angle, namely a second taper angle alpha 2, when the left taper is larger than the right taper, preferably, 0 degrees is larger than the first taper angle alpha 1 and is smaller than 53 degrees, preferably, the first taper angle alpha 1 is 2-40 degrees, in particular fields, preferably, 53 degrees is larger than the first taper angle alpha 1 and is smaller than 180 degrees, preferably, the first taper angle α 1 takes a value of 53 ° to 90 °; preferably, 0 DEG < the second taper angle alpha 2 < 53 DEG, and preferably, the second taper angle alpha 2 is 2 DEG to 40 deg.

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

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

The bolt and the nut with the bidirectional conical threads are characterized in that the columnar matrix is provided with a bolt body, the outer surface of the bolt body is provided with a truncated cone body which is spirally distributed, the truncated cone body comprises an asymmetric bidirectional truncated cone body, the columnar matrix can be solid or hollow, and comprises a cylinder, a non-cylinder surface and other outer surfaces which need to be threaded, such as a cylinder surface, a conical surface and other non-cylinder surfaces. The bolt and the nut with the bidirectional conical threads are characterized in that the bolt and the nut are formed by that the lower bottom surfaces of two conical frustums with the same lower bottom surface and the same upper top surface but different cone heights are symmetrical and are oppositely jointed with each other to form a spiral thread, the upper top surfaces of the two conical frustums are positioned at two ends of the bidirectional conical frustums and form olive-shaped asymmetrical bidirectional conical threads, and/or the thread is formed by mutually jointing the upper top surfaces of the two conical frustums to form a spiral thread, the external thread comprises a first spiral conical surface of the conical frustums, namely a left side conical surface, and a second spiral conical surface of the conical frustums, namely a right side conical surface and an external thread, in the section passing through the axis of the thread, the complete single-section asymmetrical bidirectional conical external thread is a special bidirectional conical geometric body with a large middle and small two ends and shaped like an olive, the asymmetric bidirectional cone frustum comprises a bidirectional cone frustum conical surface, wherein the included angle between two element lines of the left-side conical surface, namely a first spiral conical surface of the cone frustum is a first cone angle alpha 1, the first spiral conical surface of the cone frustum forms a left-side conical degree and is distributed in the left direction, the left-side conical degree corresponds to the first cone angle alpha 1, the included angle between two element lines of the right-side conical surface, namely a second spiral conical surface of the cone frustum is a second cone angle alpha 2, the second spiral conical surface of the cone frustum forms a right-side conical degree and is distributed in the right direction, the right-side conical degree corresponds to the second cone angle alpha 2, the first cone angle alpha 1 and the second cone angle alpha 2 correspond to opposite conical directions, the element lines are intersection lines of the conical surfaces and planes passing through axes of the cones, and the shape formed by the first spiral conical surface of the cone frustum and the second spiral conical surface of the cone frustum is the same as the shape formed by overlapping the bottom edge of a columnar parent body with the bottom edge and the same as the bottom edge but the top edge of the columnar parent body The lower bases of two right trapezoids with different right-angled sides are symmetrical, the right-angled sides of the right-angled trapezoid combination body which is jointed oppositely are the same in shape of the spiral outer side surface of the revolution body formed by the two inclined sides of the right-angled trapezoid combination body, the lower bases of the two right-angled trapezoids with different right-angled sides are symmetrical and jointed oppositely, the lower bases of the two right-angled trapezoids with the same lower bases and the same upper bases are positioned at the two ends of the right-angled trapezoid combination body, the right-angled sides of the right-angled trapezoid combination body are the same in circumferential direction and rotate at a constant speed, the right-angled trapezoid combination body moves axially along the central axis of the columnar parent body at a constant speed simultaneously, and the spiral outer side surfaces of the revolution body formed by the two inclined sides of the right-angled trapezoid combination body are the same in shape.

The bolt and the nut with the bidirectional conical threads are characterized in that the cylindrical parent body is provided with a nut body, tapered holes are distributed on the inner surface of the nut body in a spiral manner, the tapered holes comprise asymmetric bidirectional tapered holes, the cylindrical parent body comprises a cylinder body and/or a non-cylinder body and other workpieces and objects which need to be processed with the internal threads on the inner surface, and the inner surface comprises the inner surface geometrical shapes such as non-cylindrical surfaces such as cylindrical surfaces and conical surfaces. The bolt and the nut of the bidirectional conical thread are characterized in that the thread is formed by two conical holes with the same lower bottom surface and the same upper top surface but different cone heights, the lower bottom surfaces of the two conical holes are symmetrical and are mutually jointed in opposite directions to form a spiral thread, the upper top surfaces of the two conical holes are positioned at two ends of the bidirectional conical hole and form the olive-like asymmetrical bidirectional conical thread, the thread is respectively jointed with the upper top surfaces of the adjacent bidirectional conical holes, and/or the thread is formed by mutually jointing the upper top surfaces of the adjacent bidirectional conical holes to form a spiral thread, the internal thread comprises a first spiral conical surface of the conical hole, namely a left conical surface, and a second spiral conical surface of the conical hole, namely a right conical surface and an internal spiral line, in the section passing through the axis of the thread, the complete single-section asymmetrical bidirectional conical internal thread is a special bidirectional conical geometric body with the large middle and the small two ends and the olive-like, the asymmetric bidirectional tapered hole comprises a bidirectional tapered hole conical surface, wherein an included angle formed by two plain lines of a left conical surface, namely a first spiral conical surface of the tapered hole, is a first taper angle alpha 1, the first spiral conical surface of the tapered hole forms a left taper and is distributed in a left direction, the left taper corresponds to the first taper angle alpha 1, an included angle formed by two plain lines of a right conical surface, namely a second spiral conical surface of the tapered hole, is a second taper angle alpha 2, the second spiral conical surface of the tapered hole forms a right taper and is distributed in a right direction, the right taper corresponds to the second taper angle alpha 2, the taper directions corresponding to the first taper angle alpha 1 and the second taper angle alpha 2 are opposite, the plain lines are intersection lines of the conical surface and a plane passing through a conical axis, and the shape formed by the first spiral conical surface of the tapered hole and the second spiral conical surface of the tapered hole of the bidirectional tapered hole is coincident with a tubular parent body and has the same lower base line and the same upper base line but different right-angle sides The lower bottom edges of the right trapezoid combination bodies which are symmetrical and oppositely jointed are the right edges of the right trapezoid combination bodies which circumferentially rotate at a constant speed for the rotation center, the right trapezoid combination bodies axially move at a constant speed along the central axis of the cylindrical parent body at the same time, the spiral outer side surfaces of the revolution bodies formed by the two inclined edges of the right trapezoid combination bodies are the same in shape, the right trapezoid combination bodies are special geometric bodies which are symmetrical and oppositely jointed by the lower bottom edges of the two right trapezoid combination bodies with the same lower bottom edge and the same upper bottom edge but different right edges, and the upper bottom edges of the two right trapezoid combination bodies are respectively positioned at the two ends of the right trapezoid combination bodies.

When the connecting structure of the bolt and the nut with the bidirectional conical threads works, the relation between the connecting structure and a workpiece comprises rigid connection and non-rigid connection. The rigid connection refers to a nut bearing surface and a workpiece bearing surface which are bearing surfaces, and comprises a single nut, a double nut and other structural forms, the non-rigid connection refers to two nuts with opposite side end surfaces bearing surfaces and/or two nuts with a gasket between the opposite side end surfaces, and the two nuts are indirectly bearing surfaces, and is mainly applied to non-rigid connection workpieces such as non-rigid materials or transmission parts or application fields such as requirements and the like needing to be met through double nut installation, the workpieces refer to connected objects including the workpieces, and the gasket refers to a spacer including the gasket.

The bolt and nut with bidirectional conical threads have different conical thread bearing surfaces when a bolt and double-nut connecting structure is adopted and the relation with a fastened workpiece is rigid connection, when a cylindrical parent body is positioned on the left side of the fastened workpiece, namely the left side end surface of the fastened workpiece, and the right side end surface of the cylindrical parent body, namely a left side nut body, is the locking bearing surface of the left side nut body and the fastened workpiece, the right side spiral conical surface of the bidirectional conical threads of the left side nut body and a cylindrical parent body, namely a bolt body, namely a conical hole second spiral conical surface and the conical frustum second spiral conical surface are conical thread bearing surfaces, and the conical hole second spiral conical surface and the conical frustum second spiral conical surface are mutually used as bearing surfaces, when the cylindrical parent body is positioned on the right side of the fastened workpiece, namely the right side end surface of the fastened workpiece, and the left side end surface of the cylindrical parent body, namely a right side nut body, is the locking bearing surface of the fastened workpiece, the right nut body and the columnar parent body, namely the screw body, namely the left spiral conical surface of the bidirectional conical thread of the bolt, namely the first spiral conical surface of the conical hole and the first spiral conical surface of the cone frustum body are conical thread bearing surfaces, and the first spiral conical surface of the conical hole and the first spiral conical surface of the cone frustum body are mutually bearing surfaces.

When the bolt and the nut with the bidirectional conical threads adopt a bolt and single nut connecting structure and are rigidly connected with a fastened workpiece, when the hexagonal head of the bolt is positioned on the left side, the cylindrical parent body, namely the nut body, namely the single nut is positioned on the right side of the fastened workpiece, when the bolt and single nut connecting structure works, the right end surface of the workpiece and the left end surface of the nut body are locking and supporting surfaces of the nut body and the fastened workpiece, the nut body and the cylindrical parent body, namely the bolt body, namely the left spiral conical surface of the bidirectional conical threads of the bolt, namely the first spiral conical surface of the conical hole and the first spiral conical surface of the cone frustum are conical thread supporting surfaces, and the first spiral conical surface of the conical hole and the first spiral conical surface of the cone frustum are mutually supporting surfaces; when the hexagonal head of the bolt is positioned on the right side, the cylindrical parent body, namely the nut body, namely the single nut is positioned on the left side of the fastened workpiece, when the bolt and single nut connecting structure works, the left side end face of the workpiece and the right side end face of the nut body are locking and supporting faces of the nut body and the fastened workpiece, the nut body and the cylindrical parent body, namely the bolt body, namely the right spiral conical surface of the bidirectional conical thread of the bolt, namely the conical hole second spiral conical surface and the conical frustum second spiral conical surface are conical thread supporting faces, and the conical hole second spiral conical surface and the conical frustum second spiral conical surface are mutually supporting faces.

The bolt and nut with bidirectional conical threads adopts a connection structure of the bolt and double nuts, and when the connection structure is in non-rigid connection with a fastened workpiece, the thread working bearing surfaces, namely conical thread bearing surfaces, are different, the cylindrical parent body comprises a left nut body and a right nut body, the right end surface of the left nut body is in direct contact with the left end surface of the right nut body in opposite directions and is a locking bearing surface, when the right end surface of the left nut body is a locking bearing surface, the left nut body and the cylindrical parent body, namely a bolt body, namely the right spiral conical surface of the bidirectional conical threads of the bolt, namely a conical hole second spiral conical surface and a conical frustum second spiral conical surface are conical thread bearing surfaces, when the left end surface of the right nut body is a locking bearing surface, the right nut body and the cylindrical parent body, namely the bolt body, namely the left spiral conical surface of the bidirectional conical threads of the bolt, namely the conical surface, namely the conical frustum The first spiral conical surface of the hole and the first spiral conical surface of the truncated cone body are conical thread bearing surfaces, and the first spiral conical surface of the conical hole and the first spiral conical surface of the truncated cone body are bearing surfaces.

The bolt and nut of the bidirectional tapered thread adopts a connection structure of the bolt and double nuts, when the connection structure is in non-rigid connection with a fastened workpiece, thread working bearing surfaces, namely tapered thread bearing surfaces, are different, the cylindrical parent bodies comprise a left nut body and a right nut body, a spacer such as a gasket is arranged between the two cylindrical parent bodies, namely the left nut body and the right nut body, the right end surface of the left nut body and the left end surface of the right nut body are in opposite indirect contact through the gasket to indirectly form locking bearing surfaces, when the cylindrical parent bodies are positioned on the left side of the gasket, namely the left side surface of the gasket, and the right end surface of the left nut body is the locking bearing surface of the left nut body, the left nut body and the cylindrical parent bodies, namely the bolt bodies, namely the right spiral conical surface of the bidirectional tapered thread, namely a second spiral conical hole conical surface and a second spiral conical surface of the conical frustum body are tapered thread bearing surfaces, and the second spiral conical surface and the second spiral conical surface of the conical frustum body are conical surfaces The right nut body and the columnar parent body are tapered thread bearing surfaces, and the tapered hole first helical conical surface and the truncated cone first helical conical surface are bearing surfaces mutually.

The bolt and the nut with the bidirectional conical threads adopt a bolt and double-nut connecting structure, when the relation between the bolt and a fastened workpiece is non-rigid connection, when a cylindrical parent body positioned on the inner side, namely a nut body adjacent to the fastened workpiece, is effectively combined with a cylindrical parent body, namely a screw body, namely a bolt, namely an inner thread and an outer thread which form a conical thread connecting pair are effectively embraced together, the cylindrical parent body positioned on the outer side, namely the nut body which is not adjacent to the fastened workpiece, can be kept in an original state and/or disassembled according to the application working condition, and only one nut is left (for example, the application fields of light weight of equipment or double nuts are not needed to ensure the reliability of the connecting technology and the like), the disassembled nut body is not used as a connecting nut but only used as an installation process nut, and the inner thread of the installation process nut is manufactured by adopting the bidirectional conical threads, the nut body can also be manufactured by adopting one-way tapered threads and other threads which can be screwed with the tapered threads, namely the threads of non-tapered threads such as triangular threads, trapezoidal threads, saw-tooth threads and the like, so as to ensure the reliability of the connection technology, the tapered threaded connection pair is a closed-loop fastening technical system, namely the tapered threaded connection pair can be an independent technical system after the internal threads and the external threads of the tapered threaded connection pair are effectively clasped together without depending on the technical compensation of the three parts to ensure the technical effectiveness of the connection technical system, namely the effectiveness of the tapered threaded connection pair cannot be influenced even if no other objects are supported, including a gap between the tapered threaded connection pair and a fastened workpiece, so that the nut body is favorable for greatly reducing the weight of equipment, removing the ineffective load, and improving the effective load capacity, the braking performance, energy conservation, emission reduction and other technical requirements, this is a thread technical advantage which is unique to the tapered thread connection pair of the present bi-directional tapered thread bolt-and-nut connection structure and the fastened workpiece, regardless of whether the connection is non-rigid or rigid, but which is not possessed by other thread techniques.

The bidirectional tapered thread bolt and nut are applied to transmission connection and are equivalent to a group of sliding bearing pairs consisting of one pair and/or a plurality of pairs of sliding bearings, namely, each section of bidirectional tapered internal thread bidirectionally contains a corresponding section of bidirectional tapered external thread to form a pair of sliding bearings, namely, the number of the sections of bidirectional tapered internal thread is adjusted according to application conditions, namely, the bidirectional tapered internal thread and the bidirectional tapered external thread are effectively bidirectionally engaged, namely, the contained and contained thread sections are effectively bidirectionally contacted and clasped, according to the design of application working conditions, the bidirectional conical frustum is contained through the bidirectional conical hole, and the bidirectional conical frustum is positioned in multiple directions such as radial direction, axial direction, angular direction and circumferential direction, preferably, the bidirectional conical frustum is contained through the bidirectional conical hole, the radial direction and circumferential direction main positioning is assisted by the axial direction and angular direction auxiliary positioning, so that 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 with the conical surface of the bidirectional conical frustum to realize self-positioning or until the sizing interference contact generates self-locking, a special synthesis technology of a conical pair and a thread pair is formed, and the transmission connection precision, efficiency and reliability of a conical thread technology, particularly a bolt and nut connection structure of the bidirectional conical thread are ensured.

The bolt and the nut with the bidirectional conical threads are fastened, connected and sealed, and the technical performance of the bolt and the nut is realized through the screwing connection of the bidirectional conical hole and the bidirectional 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 the interference is realized, 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 the interference is realized, and according to the application working condition, the bearing in one direction is realized and/or the bearing in two directions is simultaneously realized, namely the inner cone and the outer cone are centered under the guide of a spiral line of the bidirectional conical frustum body and the bidirectional conical hole 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 the bearing in one direction or the bearing and sizing fit in two directions simultaneously or until the sizing contact is realized and/or the second spiral conical surface of the bidirectional conical hole and the second spiral conical frustum body are clasped to achieve the bearing in one direction or the bearing fit in two directions or the two directions The bearing and sizing are matched or until the bearing and sizing are in interference contact, namely the self-locking and radial, axial, angular, circumferential and other multidirectional positioning of the conical external thread bidirectional outer cone are contained by the conical internal thread bidirectional inner cone, preferably, the bidirectional cone frustum is contained by the bidirectional conical hole, and the radial and circumferential main positioning is assisted by the axial and angular auxiliary positioning to further form the multidirectional positioning of the inner cone and the outer cone until the conical surface of the bidirectional conical hole is embraced with the conical surface of the bidirectional cone frustum to realize self-positioning or until the sizing interference contact generates self-locking, so that a special synthesis technology of a cone pair and a thread pair is formed, the efficiency and reliability of a conical thread technology, particularly a bolt and a nut of the bidirectional conical thread, are ensured, and the technical performances of mechanical mechanism connection, locking, looseness prevention, bearing, fatigue, sealing and the like are realized.

Therefore, the technical performances of the bolt and the nut with the bidirectional tapered threads, such as high transmission precision efficiency, high bearing capacity, high self-locking force, high anti-loosening capacity, high sealing performance and the like, are related to the sizes of the first spiral conical surface of the cone frustum, the left side conical degree formed by the first spiral conical surface, namely the first cone angle alpha 1, the second spiral conical surface of the cone frustum, the right side conical degree formed by the second spiral conical surface of the cone frustum, namely the second cone angle alpha 2, the first spiral conical surface of the tapered hole, the left side conical degree formed by the first spiral conical surface of the tapered hole, namely the first cone angle alpha 1, the second spiral conical surface of the tapered hole, and the right side conical degree formed by the second spiral conical surface, namely the second cone angle alpha 2. The material friction coefficient, the processing quality and the application working condition of the columnar matrix and the cylindrical matrix also have certain influence on the conical matching.

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

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

In the bolt and the nut with the bidirectional tapered threads, the first spiral conical surface of the truncated cone body and the second spiral conical surface of the truncated cone body are both continuous helicoids or non-continuous helicoids; the first spiral conical surface of the tapered hole and the second spiral conical surface of the tapered hole are both continuous helical surfaces or non-continuous helical surfaces.

In the bolt and the nut with the bidirectional conical threads, when the cylindrical parent body connecting hole is screwed into the screwing-in end of the cylindrical parent body, the screwing-in direction is required, namely the cylindrical parent body connecting hole cannot be screwed in the opposite direction. In the bolt and the nut with the bidirectional conical threads, one end of the columnar parent body is provided with a head part with a size larger than the outer diameter of the columnar parent body and/or one end and/or two ends of the columnar parent body are/is provided with a head part with a small diameter smaller than the bidirectional conical outer threads of the bolt body of the columnar parent body, and the connecting hole is a threaded hole arranged on the nut. The connecting hole is arranged in a nut, and the nut refers to an object including the nut and having a threaded structure on the inner surface of the cylindrical parent body.

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

Drawings

Fig. 1 is a schematic view of a connection structure between a bolt and a double nut of an olive-like (left side taper is greater than right side taper) asymmetric bidirectional tapered thread according to a first embodiment of the present invention.

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

Fig. 3 is a schematic view of a nut body with olive-like (left side taper greater than right side taper) asymmetric bidirectional tapered threads and a thread structure of an internal thread complete unit body according to a first embodiment of the present invention.

Fig. 4 is a schematic view of a connection structure between a bolt and a single nut of an olive-like (left side taper is larger than right side taper) asymmetric bidirectional tapered thread according to a second embodiment of the present invention.

Fig. 5 is a schematic view of a connection structure between a bolt and a double nut of an olive-like (left side taper is larger than right side taper) asymmetric bidirectional tapered thread according to a third embodiment of the present invention.

Fig. 6 is a schematic view of a connection structure between a bolt and two nuts (with a gasket in the middle) of the olive-like (left side taper greater than right side taper) asymmetric bidirectional tapered thread according to the third embodiment of the present invention.

Fig. 7 is a schematic view of a connection structure between a bolt and a double nut of an olive-like (left-side taper smaller than right-side taper) asymmetric bidirectional tapered thread according to the fourth embodiment of the present invention.

Fig. 8 is a schematic view of a screw bolt with olive-like (left side taper smaller than right side taper) asymmetric bidirectional tapered thread external thread and a thread structure of an external thread complete unit body according to the fourth embodiment of the present invention.

Fig. 9 is a schematic view of a nut body with olive-like (left side taper smaller than right side taper) asymmetric bidirectional tapered threads and a thread structure of an internal thread complete unit body according to a fourth embodiment of the present invention.

Fig. 10 is a schematic diagram of a connection structure of a bolt including two kinds of olive-like asymmetric bidirectional tapered external threads, such as an olive-like asymmetric bidirectional tapered thread (left side taper is smaller than right side taper) and an olive-like asymmetric bidirectional tapered thread (left side taper is larger than right side taper), and a double nut hybrid combination of the olive-like asymmetric bidirectional tapered thread according to the fifth embodiment of the present invention.

Fig. 11 is a schematic view of a bolt and an external thread complete unit body thread structure including olive-like asymmetric bidirectional tapered thread external threads of two taper structural forms, i.e., olive-like (left side taper is smaller than right side taper) and olive-like (left side taper is larger than right side taper), on a single screw rod body according to the fifth embodiment.

Fig. 12 is a schematic view of a nut body with olive-like (left side taper is larger than right side taper) asymmetric bidirectional tapered thread internal threads and a thread structure of an internal thread complete unit body according to the fifth embodiment of the present invention.

Fig. 13 is a schematic view of a nut body with olive-like (left side taper smaller than right side taper) asymmetric bidirectional tapered threads and a thread structure of an internal thread complete unit body according to a fifth embodiment of the present invention.

Fig. 14 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. 15 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. 16 is a view of "lead angle of prior art screw thread" related to the background of the invention.

In the figure, a tapered thread 1, a cylindrical parent body 2, a first nut body 21, a second nut body 22, a cylindrical parent body 3, a screw body 31, a polish rod 20, a tapered bore 4, a bidirectional tapered bore 41, a bidirectional tapered bore conical surface 42, a tapered bore first helical conical surface 421, a first taper angle α 1, a tapered bore second helical conical surface 422, a second taper angle α 2, an internal thread 5, an internal thread 6, a truncated cone 7, a bidirectional truncated cone 71, a bidirectional truncated cone conical surface 72, a truncated cone first helical conical surface 721, a first taper α 1, a truncated cone second helical conical surface 722, a second taper angle α 2, an external thread 8, an external thread 9, an olive-like shape 93, a left taper 95, a right taper 96, a left distribution 97, a right distribution 98, a thread connection pair and/or thread pair 10, a clearance 101, a locking support surface 111, a locking support surface 112, a threaded connection pair and/or thread pair 10, a clearance 101, Tapered thread bearing surface 122, tapered thread bearing surface 121, workpiece 130, tapered 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, fig. 2, and fig. 3, the present embodiment adopts a connection structure of a bolt and a double nut, including 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, including 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 a containing piece and a contained piece relation: the internal thread 6 and the external thread 9 are a section of bidirectional conical geometric body which is screwed, sleeved and clasped together until interference fit, namely, the bidirectional conical hole 41 contains the bidirectional conical frustum 71 section by section, the bidirectional containing limits the disordered freedom degree between the conical hole 4 and the conical frustum 7, the screw motion enables the conical thread connection pair 10 of the bolt and the nut of the bidirectional conical thread to obtain the necessary ordered freedom degree, and the technical characteristics of the conical pair and the thread pair are effectively synthesized. In the bolt and the nut with the bidirectional tapered threads in the embodiment, the cone frustum body 7 and/or the tapered hole 4 of the tapered threaded connection pair 10 reach a certain taper, that is, the cone forming the tapered threaded connection pair reaches a certain taper angle, the tapered threaded connection pair 10 has self-locking and self-positioning properties, the taper comprises a left taper 95 and a right taper 96, the taper angle comprises a left taper and a right taper, and the asymmetric bidirectional tapered thread 1 in the embodiment is characterized in that the left taper 95 is larger than the right taper 96. The left side taper 95 corresponds to a left side taper angle, namely a first taper angle alpha 1, preferably, the angle of 0 degrees is more than the first taper angle alpha 1 and less than 53 degrees, preferably, the value of the first taper angle alpha 1 ranges from 2 degrees to 40 degrees, and the special field is a special field, namely, the special field does not need to have self-locking property and/or self-positioning property and/or high axial bearing capacity, preferably, the angle of 53 degrees is more than or equal to the first taper angle alpha 1 and less than 180 degrees, preferably, the value of the first taper angle alpha 1 ranges from 53 degrees to 90 degrees; the right taper 96 corresponds to a right taper angle, namely a second taper angle alpha 2, preferably, the second taper angle alpha 2 is more than 0 degrees and less than 53 degrees, and preferably, the second taper angle alpha 2 is 2-40 degrees.

The external thread 9 is arranged on the outer surface of the 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 cone frustum body 7 which is distributed in a spiral shape, the cone frustum body 7 comprises an asymmetric bidirectional cone frustum body 71, the asymmetric bidirectional cone frustum body 71 is a special bidirectional cone-shaped geometric body which is similar to an olive-shaped 93, the columnar parent body 3 can be solid or hollow, and comprises a cylinder, a cone, a pipe body and other workpieces and objects which need to be processed with external threads on the outer surface.

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

The internal thread 6 is arranged on the inner surface of the cylindrical parent body 2, and the cylindrical parent body 2 is characterized in that the cylindrical parent body 2 comprises a first nut body 21 and a second nut body 22, the inner surfaces of the first nut body 21 and the second nut body 22 are provided with tapered holes 4 which are distributed spirally, the tapered holes 4 comprise asymmetric bidirectional tapered holes 41, the asymmetric bidirectional tapered holes 41 are special bidirectional tapered geometric bodies which are similar to olive-shaped 93, and the cylindrical parent body 2 comprises a cylindrical body and/or a non-cylindrical body and other workpieces and objects which need to be processed with internal threads on the inner surface.

The asymmetric bidirectional tapered hole 41 in the olive-like shape 93 is characterized in that the asymmetric bidirectional tapered hole 41 is formed by symmetrically and oppositely jointing two tapered hole bottom surfaces with the same bottom surface, the same top surface and different taper heights, the upper top surfaces are positioned at two ends of the bidirectional tapered hole 41, when a bidirectional tapered thread 1 is formed, the two tapered hole bottom surfaces are respectively jointed with the upper top surfaces of the adjacent bidirectional tapered holes 41, and/or are respectively jointed with the upper top surfaces of the adjacent bidirectional tapered holes 41, the internal thread 6 comprises a first spiral conical surface 421 of the tapered hole, namely a left side conical surface, and a second spiral conical surface 422 of the tapered hole, namely a right side conical surface and an internal spiral line 5, in a section passing through a thread axis, the complete single-section asymmetric bidirectional tapered internal thread 6 is a special bidirectional tapered geometric body which is in the middle, large, has two small ends and has the taper of the left side conical hole larger than that of the right side conical hole, and is in the olive-like shape 93, the bidirectional tapered hole 41 includes a bidirectional tapered hole conical surface 42, an included angle formed by two plain lines of a left-side conical surface, namely a first conical hole spiral conical surface 421 is a first taper angle α 1, the left-side conical surface 421 forms a left-side taper 95 and is distributed in a left direction 97, the left-side taper 95 corresponds to the first taper angle α 1, an included angle formed by two plain lines of a right-side conical surface, namely a second conical hole spiral conical surface 422 is a second taper angle α 2, the tapered hole second spiral conical surface 422 forms a right-side taper 96 and is distributed in a right direction 98, the right-side taper 96 corresponds to the second taper angle α 2, the first taper angle α 1 and the second taper angle α 2 correspond to opposite taper directions, the plain lines are intersection lines of the conical surface and a plane passing through a conical axis, and the shape formed by the first conical hole conical surface 421 and the tapered hole second spiral conical surface 422 of the bidirectional tapered hole 41 is the same as the central axis of the tubular parent body 2 having a lower base line and overlapping with the central axis of the tubular parent body 2 having the same base line and having the lower base line The right-angle sides of the right-angle trapezoid combination bodies with the same upper bottom sides and different right-angle sides are symmetrical and oppositely jointed, the right-angle sides of the right-angle trapezoid combination bodies circumferentially rotate at a constant speed for the rotation center, the right-angle trapezoid combination bodies axially move at a constant speed along the central axis of the cylindrical parent body 2 at the same time, the spiral outer side surfaces of the revolution bodies formed by the two inclined sides of the right-angle trapezoid combination bodies are identical in shape, and the right-angle trapezoid combination bodies are special geometric bodies which are provided with two right-angle trapezoids with the same lower bottom sides and the same upper bottom sides but different right-angle sides, are symmetrical and oppositely jointed, and the upper bottom sides of the two right-angle trapezoids are respectively positioned at the two ends of the right-angle trapezoid combination bodies. In the present embodiment, a bolt and double nut connection structure is adopted, the double nut includes a first nut body 21 and a second nut body 22, the first nut body 21 is located on the left side of the workpiece 130 to be fastened, the second nut body 22 is located on the right side of the workpiece 130 to be fastened, when the bolt and the double nut are operated, the bolt and the workpiece 130 to be fastened are rigidly connected, the rigid connection means that a nut end surface bearing surface and a workpiece 130 bearing surface are bearing surfaces, the nut end surface bearing surface and the workpiece 130 bearing surface include a lock bearing surface 111 and a lock bearing surface 112, and the workpiece 130 means an object to be connected including the workpiece 130.

The thread operation support surface of the present embodiment is different and includes a tapered thread support surface 121 and a tapered thread support surface 122, and when the cylindrical parent body 2 is positioned on the left side of the fastened workpiece 130, that is, the left end surface of the fastened workpiece 130, and the cylindrical parent body 2, that is, the right end surface of the left first nut body 21, is the left first nut body 21 and the fastening support surface 111 of the fastened workpiece 130, the right helical conical surface of the bidirectional conical thread 1 of the bolt, which is the cylindrical parent body 3, is the thread operation support surface, that is, the tapered hole second helical conical surface 422 and the conical frustum second helical conical surface 722 are tapered thread support surfaces 122, and when the cylindrical parent body 2 is positioned on the right side of the fastened workpiece 130, that is, the right end surface of the fastened workpiece 130, the tapered thread support surface 121 and the tapered thread support surface 122 are included, and when the cylindrical parent body 2 is positioned on the right side of the fastened workpiece 130, that is, the right end surface, When the left-side end surface of the right second nut body 22, which is the cylindrical parent body 2, is the lock support surface 112 of the right second nut body 22 and the fastened workpiece 130, the left-side spiral conical surface of the bidirectional tapered thread 1 of the bolt, which is the threaded body 31, which is the right second nut body 22 and the columnar parent body 3, is the screw operation support surface, is the tapered hole first spiral conical surface 421 and the truncated cone first spiral conical surface 721 is the tapered thread support surface 121, and the tapered hole first spiral conical surface 421 and the truncated cone first spiral conical surface 721 are support surfaces for each other.

The bidirectional conical threaded bolt and nut are in transmission connection, the bidirectional conical hole 41 is in screwing connection with the bidirectional conical frustum body 71, bidirectional bearing is realized, a clearance 101 must be formed between the bidirectional conical frustum body 71 and the bidirectional conical hole 41, the clearance 101 is favorable for bearing oil film formation, the conical threaded connection pair 10 is equivalent to a sliding bearing pair consisting of one or more sliding bearings, namely each section of bidirectional conical internal thread 6 bidirectionally contains a corresponding section of bidirectional conical external thread 9 to form a pair of sliding bearings, the number of the formed sliding bearings is adjusted according to application working conditions, namely the bidirectional conical internal thread 6 is effectively and bidirectionally jointed with the bidirectional conical external thread 9, namely the number of contained and contained thread sections are effectively and bidirectionally contacted and clasped, the bidirectional conical frustum body 7 is designed according to the application working conditions, and is bidirectionally contained through the conical hole 4 and positioned in multiple directions such as radial direction, axial direction, angular direction, circumferential direction and the like, the connection precision, efficiency and reliability of the bidirectional conical thread transmission are ensured.

When the bolt and the nut with the bidirectional conical threads are fastened, connected and sealed, the technical performance is realized by the screwing connection of the bidirectional conical hole 41 and the bidirectional conical frustum 71, namely the first spiral conical surface 721 of the conical frustum and the first spiral conical surface 421 of the conical hole are sized until interference and/or the second spiral conical surface 722 of the conical frustum and the second spiral conical surface 422 of the conical hole are sized until interference, according to the application working condition, one-direction bearing and/or two-direction simultaneous bearing are achieved, namely the inner cone and the outer cone are centered under the guidance of a spiral line by the bidirectional conical frustum 71 and the bidirectional conical hole 41 until the first spiral conical surface 421 of the conical hole and the first spiral conical surface 721 of the conical frustum are clasped until interference contact and/or the second spiral conical surface 422 of the conical hole and the second spiral conical surface 722 of the conical frustum are clasped until interference contact, therefore, the technical performances of connection, locking, looseness prevention, bearing, fatigue, sealing and the like of the mechanical mechanism are realized.

Therefore, the technical performance of the bolt and the nut with the bidirectional tapered threads in the embodiment, such as transmission accuracy, high transmission efficiency, high bearing capacity, self-locking force, anti-loosening capacity, good sealing performance, reusability, is related to the size of the first helical conical surface 721 of the frustum cone, the left taper 95 formed by the first conical surface, the first taper angle α 1 formed by the second helical conical surface 722 of the frustum cone, the right taper 96 formed by the second conical surface 96, the second taper α 2 formed by the first helical conical surface 421 of the conical hole, the left taper 95 formed by the first conical surface, the first taper α 1 formed by the second helical conical surface 422 of the conical hole, and the right taper 96 formed by the second conical surface 96, the second taper 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.

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

When the right-angle trapezoidal combination body rotates at a constant speed for one circle, the axial movement distance of the right-angle trapezoidal combination body is equal to the length of the sum of the right-angle sides of two right-angle trapezoids with the same lower bottom edge and the same upper bottom edge but different right-angle sides. This structure ensures that the frustum-conical body first helical conical surface 721 and the frustum-conical body second helical conical surface 722, 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 bolt and nut with the bidirectional tapered threads, the first spiral conical surface 721 of the truncated cone body and the second spiral conical surface 722 of the truncated cone body are both continuous helical surfaces or non-continuous helical surfaces; the first conical hole surface 421 and the second conical hole surface 422 are both continuous helical surfaces or non-continuous helical surfaces.

In the bolt and the nut with the bidirectional conical threads, when the connecting hole of the cylindrical parent body 2 is screwed into the screwing end of the cylindrical parent body 3, the screwing direction is required, and the bolt and the nut cannot be screwed in the opposite direction.

In the bolt and the nut with the bidirectional tapered threads, one end of the columnar parent body 3 is provided with a head part with a size larger than the outer diameter of the columnar parent body 3 and/or one end or two ends of the columnar parent body 3 are provided with head parts with small diameters smaller than the tapered thread external threads 9 of the bolt body 31 of the columnar parent body 3, and the connecting hole is a threaded hole arranged on the first nut body 21. That is, the cylindrical parent body 3 and the head are connected by a bolt, the bolt is not provided with a head and/or the head at two ends is smaller than the small diameter of the bidirectional tapered external thread 9 and/or the bolt is provided with the bidirectional tapered external thread 9 at two ends without threads in the middle, and the connecting hole is arranged in the first nut body 21. Compared with the prior art, the tapered thread connection pair 10 of the bidirectional tapered thread bolt and nut connection structure has the advantages that: reasonable in design, simple structure, the vice sizing of circular cone through interior outer circular cone formation realizes fastening and connection function until interference fit, convenient operation, and the locking force is big, and the load value is big, and locking performance is good, and transmission efficiency and precision are high, and mechanical seal is effectual, and stability is good, can prevent to appear the pine phenomenon of taking off when connecting, has auto-lock and from the positioning function.

Example two

As shown in fig. 4, the structure, principle and implementation steps of the present embodiment are similar to those of the present embodiment, except that the present embodiment adopts a bolt-single nut connection structure, and the bolt body has a hexagonal head larger than the bolt body 31, and when the bolt hexagonal head is located on the left side, the cylindrical parent body 2, i.e., the first nut body 21, i.e., the single nut, is located on the right side of the workpiece 130 to be fastened, and when the bolt-single nut connection structure of the present embodiment is operated, the relationship with the workpiece 130 to be fastened is also rigid connection, where the rigid connection refers to a state where the end surface of the first nut body 21 and the opposite end surface of the workpiece 130 are bearing surfaces with each other, the bearing surfaces are lock bearing surfaces 111, and the workpiece 130 refers to the object to be connected including the workpiece 130.

In the present embodiment, the thread operation support surface is a tapered thread support surface 122, that is, the cylindrical parent body 2, that is, the first nut body 21, that is, the single nut, is located on the right side of the workpiece 130 to be fastened, and when the bolt-and-single-nut connection structure is operated, the right end surface of the workpiece 130 and the left end surface of the first nut body 21 are the first nut body 21 and the tightening support surface 111 of the workpiece 130 to be fastened, and the first nut body 21 and the cylindrical parent body 3, that is, the threaded rod body 31, that is, the left side helical conical surface of the bidirectional tapered thread 1 of the bolt are the tapered hole first helical conical surface 421 and the truncated cone first helical conical surface 721, that are the thread operation support surfaces, and the tapered hole first helical conical surface 421 and the truncated cone first helical conical surface 721 are support surfaces.

In this embodiment, when the hexagonal head of the bolt is located at the right side, the structure, principle and implementation steps are similar to those of this embodiment.

EXAMPLE III

As shown in fig. 5 and 6, the structure, principle and implementation steps of the present embodiment are similar to those of the present embodiment, except that the double nuts are in different positional relationship with the fastened workpiece 130, the double nut comprises a first nut body 21 and a second nut body 22, the bolt body is provided with a hexagonal head part which is larger than the bolt body 31, when the hexagonal head of the bolt is positioned at the left side, the first nut body 21 and the second nut body 22 are both positioned at the right side of the workpiece 130 to be fastened, and the bolt and the double-nut connection structure work, the relationship between the first nut body 21, the second nut body 22 and the fastened workpiece 130 is a non-rigid connection, the non-rigid connection means that the end surfaces of the opposite side surfaces of the two nuts, namely the first nut body 21 and the second nut body 22, are mutually supporting surfaces, the bearing surfaces comprise a locking bearing surface 111 and a locking bearing surface 112, and are mainly applied to the application fields of non-rigid connecting workpieces 130 such as non-rigid materials or transmission parts, and the like, or the application fields of meeting requirements through double nut installation, and the like. The workpiece 130 refers to a connected object including the workpiece 130.

The thread operation support surface of the present embodiment is different, and includes a tapered thread support surface 121 and a tapered thread support surface 122, the cylindrical base body 2 includes a left-side first nut body 21 and a right-side second nut body 22, the right-side end surface of the left-side first nut body 21, i.e., the lock support surface 111, and the left-side end surface of the right-side second nut body 22, i.e., the lock support surface 112, are in direct contact with each other and are lock support surfaces, when the right-side end surface of the left-side first nut body 21 is the lock support surface 111, the right-side helical conical surface of the left-side first nut body 21 and the column base body 3, i.e., the screw body 31, i.e., the bidirectional tapered thread 1 of the bolt, is a thread operation support surface, i.e., a tapered hole second helical conical surface 422 and a tapered frustum second helical conical surface 722 are tapered thread support surfaces 122, and the tapered hole second helical conical cone surface 422 and the tapered frustum second helical conical surface 722 are support surfaces, when the left end surface of the right second nut body 22 is the lock support surface 112, the left spiral conical surfaces of the right second nut body 22 and the cylindrical body 3, i.e., the screw body 31, i.e., the bidirectional tapered thread 1 of the bolt, are the tapered hole first spiral conical surface 421 which is the thread operation support surface and the truncated cone first spiral conical surface 721 is the tapered thread support surface 121, and the tapered hole first spiral conical surface 421 and the truncated cone first spiral conical surface 721 are support surfaces for each other.

In this embodiment, when the inner cylindrical parent body 2, i.e., the first nut body 21 adjacent to the fastened workpiece 130, has been effectively combined with the cylindrical parent body 3, i.e., the bolt body 31, i.e., the bolt, i.e., the internal thread 6 and the external thread 9 constituting the tapered threaded connection pair 10, effectively clasped together, the outer cylindrical parent body 2, i.e., the second nut body 22 not adjacent to the fastened workpiece 130, may be left as it is and/or removed according to the application requirements and only one nut (e.g., when the equipment requires light weight or does not require double nuts to ensure the reliability of the connection technology, etc.), the removed second nut body 22 may not be used as a connection nut but only as an installation process nut, where the internal thread of the installation process nut is made of a bidirectional tapered thread, or may be made of a unidirectional tapered thread and other threads capable of being screwed with the tapered thread 1, i.e., including a triangular thread, The second nut body 22 manufactured by the threads of the non-tapered threads such as the trapezoidal threads and the saw-tooth threads ensures the reliability of the connection technology, the tapered threaded connection pair 10 is a closed-loop fastening technology system, namely after the internal threads 6 and the external threads 9 of the tapered threaded connection pair 10 are effectively clasped together, the tapered threaded connection pair 10 is an independent technology system without depending on the technology compensation of the third party to ensure the technical effectiveness of the connection technology system, namely even if no other objects support the second nut body, the gap between the tapered threaded connection pair 10 and the fastened workpiece 130 does not influence the effectiveness of the tapered threaded connection pair 10, the weight of the equipment is greatly reduced, the ineffective load is removed, the effective load capacity, the braking performance, the energy conservation and emission reduction of the equipment are improved, and the technical requirements of the bolt and nut connection structure of the bidirectional tapered threaded connection pair 10 and the fastened workpiece 130 are not rigid connection or rigid connection Thread technology advantages that are unique to joining and not available with other thread technologies.

In this embodiment, when a spacer is disposed between the first nut body 21 and the second nut body 22, the structure, principle and implementation steps are similar to those of the present embodiment.

In the present embodiment, when the hexagon head of the bolt is located at the right side, the first nut body 21 and the second nut body 22 are both located at the left side of the workpiece 130 to be fastened, and the structure, principle and implementation steps are similar to those of the present embodiment.

Example four

As shown in fig. 7, 8 and 9, the structure, principle and implementation steps of the present embodiment are similar to those of the first, second and third embodiments, except that the asymmetric bidirectional tapered thread 1 in the present embodiment has a left-side taper 95 smaller than a right-side taper 96, preferably 0 ° < a first taper angle α 1 < 53 °, and preferably the first taper angle α 1 is 2 ° to 40 °; preferably, the second taper angle alpha 2 is more than 0 degree and less than 53 degrees, preferably, the value of the second taper angle alpha 2 is 2 degrees to 40 degrees, in particular, the special field is preferably that the second taper angle alpha 2 is more than or equal to 53 degrees and less than 180 degrees, preferably, the value of the second taper angle alpha 2 is 53 degrees to 90 degrees.

EXAMPLE five

As shown in fig. 10, 11, 12, and 13, the structure, principle, and implementation steps of this embodiment are similar to those of the first embodiment and the fourth embodiment, except that the screw body 31 of the cylindrical parent body 3 in this embodiment includes two types of thread structures of the olive-like 93 asymmetric bidirectional tapered threads 1, that is, the asymmetric bidirectional tapered threads 1 of the screw body 31 are the olive-like 93 asymmetric bidirectional tapered external threads 9 having two types of taper structures, that is, the left-side taper 95 is smaller than the right-side taper 96 and the left-side taper 95 is greater than the right-side taper 96, the thread section of the screw body 31 on the left side of the polish rod 20, that is, the unthreaded section of the screw body is the olive-like 93 asymmetric bidirectional tapered external threads 9 having the left-side taper 95 greater than the right-side taper 96, that is, the thread section of the external threads 9 that is in threaded engagement with the cylindrical parent body 2, that is, the thread section of the screw body 31 on the right side of the polish rod 20, i.e. the unthreaded section, is an asymmetric bidirectional tapered external thread 9 with a left-side taper 95 smaller than a right-side taper 96 in a olive-like shape 93, i.e. the thread section where the external thread 9 is in threaded fit with the cylindrical parent body 2 on the right side of the workpiece 130, i.e. the second nut body 22, is the asymmetric bidirectional tapered external thread 9 in the olive-like shape 93, and the left-side taper 95 is smaller.

In the present embodiment, an asymmetric bidirectional tapered internal thread 6 including a left-side taper 95 of the olive-like shape 93 smaller than the right-side taper 96 in the cylindrical parent body 2 on the left side of the workpiece 130, i.e., the internal thread 6 of the first nut body 21, is an asymmetric bidirectional tapered internal thread 6 including a left-side taper 95 of the olive-like shape 93 smaller than the right-side taper 96, and an asymmetric bidirectional tapered internal thread 6 including a left-side taper 95 of the olive-like shape 93 larger than the right-side taper 96 in the cylindrical parent body 2 on the right side of the workpiece 130, i.e., the internal thread 6 of the second nut body 22, i.e., the internal thread 6 of the cylindrical parent body 2 on the right side of the workpiece 130, may also be adopted, and accordingly, the asymmetric bidirectional tapered external thread 9 including two taper configurations of the olive-like shape 93 is also included in the above-mentioned olive-like 93 asymmetric bidirectional tapered external thread 1 of the screw body 31, i.e., the screw body 20 on the left side of the screw body 31, i.e., the screw body 20 on the right side of the non-threaded portion, i.e., the screw body, i.e., the asymmetric bidirectional tapered external thread 9, which the left-side taper 95 of the olive-like shape 93 is an asymmetric bidirectional tapered external thread of the right side taper 96 on the olive-side of the olive-like shape 93 The external thread 9, that is, the left thread section of the screw body 31 where the external thread 9 and the first nut body 21 are mutually matched in thread is the olive-like 93 asymmetric bidirectional tapered external thread 9, and the left taper 95 is smaller than the right taper 96, the right thread section of the screw body 31 where the external thread 9 and the second nut body 22 are mutually matched in thread is the olive-like 93 asymmetric bidirectional tapered external thread 9, and the left taper 95 is larger than the right taper 96, and the structure, principle and implementation steps are similar to those of the present embodiment.

The combination of the bolt and the double nuts is determined by the application requirement. 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, first nut body 21, second nut body 22, cylindrical parent body 3, screw body 31, polish rod 20, 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 line 5, internal thread 6, 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 line 8, external thread 9, olive-like 93, left-side taper 95, right-side taper 96, left-side distribution 97, right-side distribution 98, threaded connection pair and/or thread pair 10, play 101, self-locking force, screw thread pair, and/or thread pair 10, play 101 are used more extensively herein, Self-positioning, pressure, cone axis 01, thread axis 02, mirror image, bushing, shaft, 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 colinear, internal stress, bi-directional force, unidirectional force, plain bearing pair, lock bearing surface 111, lock bearing surface 112, taper thread bearing surface 122, taper thread bearing surface 121, non-solid space, material solid, workpiece 130, non-rigid connection, non-rigid material, transmission, shim and like terms, it does not exclude the possibility of using other terms, which are merely used to more conveniently describe and explain the nature of the invention and to interpret any additional limitations that may be contrary to the spirit of the invention.

Claims (10)

1. A bolt and nut connecting structure of olive-like asymmetric bidirectional tapered threads comprises external threads (9) and internal threads (6) which are in threaded fit with each other, and is characterized in that the complete unit body threads of the olive-like asymmetric bidirectional tapered threads (1) are olive-like asymmetric bidirectional tapered bodies (93) which are spiral, large in the middle and small in two ends, and different in left-side taper (95) and right-side taper (96), and comprise bidirectional tapered holes (41) and bidirectional tapered frustum bodies (71) and comprise two taper structural forms, namely a left-side taper (95) larger than the right-side taper (96) and a left-side taper (95) smaller than the right-side taper (96), the internal thread (6) thread body is a cylindrical parent body (2) of which the inner surface is a spiral bidirectional tapered hole (41), and the external thread (9) thread body is a cylindrical parent body (3) of which the outer surface is a spiral bidirectional tapered frustum body (71), the left side conical surface of the asymmetric bidirectional conical body forms a left side conical surface (95) corresponding to a first conical angle alpha 1, the right side conical surface forms a right side conical surface (96) corresponding to a second conical angle alpha 2, the left side conical surface (95) and the right side conical surface (96) are opposite in direction and different in conical degree, the internal thread (6) and the external thread (9) contain the conical body through conical holes until the internal conical surface and the external conical surface are mutually loaded, the left side conical degree (95) is greater than the right side conical degree (96), wherein the angle alpha 1 is greater than 0 degrees and less than 53 degrees, the angle alpha 2 is greater than 0 degrees and less than 53 degrees, or the angle alpha 1 is greater than 53 degrees and less than 180 degrees; the left side taper (95) is less than the right side taper (96), wherein the first taper angle alpha 1 is greater than 0 DEG and less than 53 DEG, the second taper angle alpha 2 is greater than 0 DEG and less than 53 DEG, or the second taper angle alpha 2 is greater than 53 DEG and less than 180 deg.

2. The structure for connecting a bolt and a nut with an olive-like asymmetric bidirectional tapered thread according to claim 1, wherein the internal thread (6) comprises a left side conical surface (i.e., a first conical helical conical surface (421) of the bidirectional conical hole and a right side conical surface (i.e., a second conical helical conical surface (422) of the conical hole and an internal spiral line (5) of the bidirectional conical hole conical surface (42), the first conical helical conical surface (421) of the conical hole and the second conical helical conical surface (422) of the conical hole are formed in a shape that is symmetrical with and engaged with the lower bases of two right trapezoids having the same lower base and the same upper base but different right-angled sides and overlapping on the central axis of the cylindrical parent body (2) as the center of rotation, the right-angled trapezoids rotate uniformly in the circumferential direction and move axially at a uniform speed along the central axis of the cylindrical parent body (2) at the same time, the spiral outer side surfaces of the revolution bodies formed by the two bevel edges of the right-angle trapezoidal combination bodies have the same shape; the external thread (9) comprises a left side conical surface, namely a first spiral conical surface (721) of the truncated cone, and a right side conical surface, namely a second spiral conical surface (722) of the truncated cone, of the bidirectional conical surface (72), and an external thread (8), and the shapes formed by the first spiral conical surface (721) of the truncated cone and the second spiral conical surface (722) of the truncated cone, namely the bidirectional spiral conical surface, the right-angle sides of a right-angle trapezoidal combination body which is symmetrical and oppositely jointed with the lower bottom sides of two right-angle trapezoids with the same lower bottom side and the same upper bottom side but different right-angle sides and is superposed on the central axis of the columnar parent body (3) are taken as the rotation center, the combination body rotates at a uniform speed in the circumferential direction and moves axially at a uniform speed along the central axis of the columnar parent body (3) at the same time, and the spiral outer side surface of the revolution body formed by two bevel edges of the right-angle trapezoidal combination body has the same shape.

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

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

5. The screw and nut connection structure of the olive-like asymmetric bidirectional tapered thread as set forth in claim 2, wherein the left and right tapered surfaces of the bidirectional tapered body, i.e., the tapered hole first helical tapered surface (421), the tapered hole second helical tapered surface (422) and the internal spiral (5), are continuous helical surfaces or discontinuous helical surfaces, and the tapered frustum first helical tapered surface (721), the tapered frustum second helical tapered surface (722) and the external spiral (8) are continuous helical surfaces or discontinuous helical surfaces.

6. The structure for connecting a bolt and a nut with olive-like asymmetric bidirectional tapered threads according to claim 1, wherein the internal threads (6) are formed by joining the lower bottom surfaces of two tapered holes (4) having the same lower bottom surface and the same upper top surface but different tapered heights to each other symmetrically and oppositely, and the upper top surfaces are located at both ends of the bidirectional tapered holes (41), and when the olive-like (93) asymmetric bidirectional tapered threads (1) are formed, the olive-like (93) asymmetric bidirectional tapered threads internal threads are formed by joining the upper top surfaces of the adjacent bidirectional tapered holes (41) to each other, and/or by joining the upper top surfaces of the adjacent bidirectional tapered holes (41) to each other spirally, and the external threads (9) are joined to each other symmetrically and oppositely by the lower bottom surfaces of two frustoconical bodies (7) having the same lower bottom surface and the same upper top surface but different tapered heights, and the upper top surfaces are positioned at two ends of the two-way frustum bodies (71), and when the olive-like (93) asymmetric two-way tapered thread (1) is formed, the olive-like (93) asymmetric two-way tapered thread external thread is formed by mutually jointing the upper top surfaces of the adjacent two-way frustum bodies (71) and/or spirally jointing the upper top surfaces of the adjacent two-way frustum bodies (71).

7. The screw bolt and nut connection structure of the olive-like asymmetric bidirectional tapered thread according to claim 1, wherein the internal thread (6) and the external thread (9) form a thread connection pair (10), which is supported by a contact surface serving as a bearing surface by a first helical conical surface (421) and a second helical conical surface (422) of the tapered hole and a first helical conical surface (721) and a second helical conical surface (722) of the truncated cone which are matched with each other, and/or the internal and external diameters of the internal cone and the external cone are centered under the guidance of the helical line until the conical surface (42) of the bidirectional tapered hole and the conical surface (72) of the bidirectional truncated cone are in self-positioning contact and/or self-locking is generated.

8. The structure for connecting a bolt and a nut with olive-like asymmetric bidirectional tapered threads as claimed in claim 1, wherein the cylindrical parent body (3) has a screw body (31), the screw body (31) has external threads (9) with olive-like (93) left side taper (95) larger than right side taper (96) and/or external threads (9) with olive-like (93) left side taper (95) smaller than right side taper (96), when the connecting hole of the cylindrical parent body (2) is screwed into the screwing end of the cylindrical parent body (3), there is a screwing direction requirement that the connecting hole of the cylindrical parent body (2) cannot be screwed in the opposite direction, the connecting hole is a threaded hole provided on the first nut body (21) and the second nut body (22), the connecting hole is provided in the first nut body (21) and the second nut body (22), the nut is an object with a threaded structure on the inner surface of the cylindrical parent body (2) and comprises a nut, when a single nut or double nuts or a plurality of nuts of the internal thread (6) of the cylindrical parent body (2) and the external thread (9) of the screw body (31) of the cylindrical parent body (3) are matched and combined with each other in a threaded manner, the threads of the cylindrical parent body (2) comprise the internal thread (6) with olive-like shape (93) and left side taper (95) larger than right side taper (96) and/or the internal thread (6) with olive-like shape (93) and left side taper (95) smaller than right side taper (96).

9. The structure for connecting the screw bolt and the nut with the olive-shaped asymmetric bidirectional tapered thread as claimed in claim 1 or 8, wherein the connection between the cylindrical parent body (3) and the cylindrical parent body (2) includes rigid connection or non-rigid connection when in operation, the relationship between the connection and the workpiece (130) includes rigid connection or non-rigid connection, the rigid connection refers to a connection structure that the bearing surfaces of the nut and the bearing surfaces of the workpiece (130) are bearing surfaces, and includes a plurality of structural forms of single nut and double nut, the non-rigid connection refers to a connection structure that the facing surfaces of the two nuts are bearing surfaces or the facing surfaces of the two nuts are provided with gaskets and indirectly are bearing surfaces, the connection structure is mainly applied to non-rigid connection workpieces comprising non-rigid materials and transmission members or application fields that the requirement is met through double nut installation, the workpiece (130) refers to a connected object comprising the workpiece, the gasket is a spacer comprising the gasket, when a cylindrical parent body (2) is effectively combined with a cylindrical parent body (3), namely an internal thread (6) and an external thread (9) which form a threaded connection pair (10) are effectively embraced together, the other cylindrical parent body is removed or reserved, the removed cylindrical parent body is used as an installation process nut, the internal thread comprises a bidirectional tapered thread (1), a unidirectional tapered thread and a suitable traditional thread comprising a triangular thread, a trapezoidal thread, a zigzag thread, a rectangular thread and an arc thread, and the internal thread comprises a thread body, namely the traditional thread of which a tooth body is subjected to deformation treatment.

10. The screw-nut connection structure of the olive-like asymmetric bidirectional tapered thread as claimed in claim 1, wherein said internal thread (6) and/or external thread (9) includes a single-thread body with an incomplete tapered geometry, i.e. a single-thread body with an incomplete unit-thread.

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