WO2016019915A1

WO2016019915A1 - Contraction connection assembly, contraction connection structure and connection method

Info

Publication number: WO2016019915A1
Application number: PCT/CN2015/086415
Authority: WO
Inventors: 杨东佐
Original assignee: 杨东佐
Priority date: 2014-08-08
Filing date: 2015-08-07
Publication date: 2016-02-11

Abstract

A contraction connection assembly, a contraction connection structure and a connection method. The contraction connection structure comprises a contraction connection assembly, and more than one connected pieces. The contraction connection assembly comprises a connection core rod, a contraction sleeve made up of more than two contraction pieces encircling the connection core rod, a sleeve used for driving the contraction sleeve to contract, and a limiting mechanism preventing the sleeve and the contraction sleeve from loosening when the contraction sleeve is in a fully contracted state. A contraction piece holding portion holding the contraction sleeve in the axial direction is provided on the connection core rod. A positioning holding portion is provided on the outer periphery of an end portion of one end of the connection core rod. The contraction pieces comprise wedge-shaped holding grooves, and tapered surfaces for contraction. A contraction sleeve accommodating space is provided in the sleeve, and a driving tapered surface is provided on a wall of the contraction sleeve accommodating space. The advantages of the present invention are that a connection will not fail even in adverse situations such as those having an especially large load, in particular an especially large axial load, especially heavy vibrations, a high temperature, or alternating variations between high and low temperatures, the connection is highly reliable, and the use of bolts and nuts may be replaced.

Description

Shrinkage connection component, shrinkage connection structure and connection method

Technical field:

The invention relates to a shrink connection assembly, a shrink connection structure and a connection method which can replace two or more objects in a mechanical and static connection instead of a nut and a bolt connection, in particular to a detachable mechanical static joint aircraft, a ship, a device, an aerospace Equipment, aircraft carriers, spacecraft, rockets, engines, nuclear reactors, trains, high-speed rail, railroad tracks, steel structures, steel bridges, automobiles, etc. High-demand, harsh environment or load-bearing mechanical parts Shrinkage connection assembly, shrink connection structure and connection method.

Background technique:

The existing detachable mechanical static joints are generally threaded connections, keyed connections, pinned connections, expanded screw connections, etc., the most widely used being threaded connections.

The threaded connection of the nut and bolt needs to be tightened. The connection force between the threaded nut and the bolt is mainly manifested by the static friction generated by the pre-tightening force when tightening the thread and the bolt. Therefore, for the threaded connection of key objects, the preload force must be controlled to ensure the reliability of the work.

Referring to the analysis of the article "Invalidation and Cause Analysis of Threaded Connections" published by Lian Zuzu, the failure form and cause analysis of the threaded connection are as follows:

One is the failure of the threaded connection due to excessive load. When the threaded bolts and nuts are tightened, the bolts are stretched due to the tensile force, causing the threads near the nut bearing surface to be subjected to a large load, and the compressive load on the nut also produces the same load concentration. When the external load increases, the bolt continues to elastically elongate, the compression deformation of the joint is reduced correspondingly (ie, the tightening force is reduced), or even disappears; or because the bolt elongation (strain) exceeds the elastic limit, permanent due to plastic yielding Deformation, which reduces the pre-tightening force, resulting in connection failure (distortion, breakage, loss of tightness, etc.).

The second is the failure of the threaded connection caused by common fatigue damage. The threaded connection is subjected to an alternating load and the pre-tightening force in the connection causes the connection to be loose. When the cyclic alternating load acts on the bolts that are only connected, the bolts are fatigue cracked or even broken due to the large alternating stress. Fatigue failure usually occurs in areas where stress concentration is severe, such as: screw head, thread closing end, thread at the screw support plane, and transition corners of the screw.

The third is the creep that causes the threaded connection to fail at high temperatures. Creep refers to the slow plastic deformation of a metal material over a long period of time under constant temperature and constant stress. Creep can occur at stresses that are less than the yield limit of the material. At low temperatures, the creep is not obvious, and only when a certain temperature (about 3/10 of the melting temperature of the material) is reached becomes significant. Creep can cause failure of the threaded connection at high temperatures. In order to eliminate creep, compensation measures are taken when the connection is assembled at room temperature, such as increasing the preload, or pre-tightening the bolts.

Fourth, fretting wear causes failure of the threaded connection. Fretting wear is caused by a surface that is subjected to heavy loads and with little relative motion on the other surface. Threaded connections that carry vibration are most susceptible to fretting wear.

The existing anti-loosening of the threaded connection is to prevent loosening by using additional static friction force, such as adding a spring washer, or using the top effect of the two nuts in the case of low speed heavy load, that is, the top nut is loosened, or in the nut. Embedding with nylon ring, etc.; second, using special anti-loose components, or materials such as anti-loose glue; third is the most important anti-loose method, which is to improve the tensile strength of bolts and nuts, from 4.9, 8.8, 10.9, Levels 12.9 and 14.9 have been continuously improved. Although there are many ways to improve the connection effect of the threaded connection, the connection between the objects relies on static friction, which cannot fundamentally solve the failure of the above-mentioned threaded connections, such as screw breaking, broken ends, thread crushing and shearing. , after the wear of the slider, etc.

The mechanical static connection between objects has some bolts broken at key parts, safety problems caused by failure of threaded connections and safety accidents. It is often encountered in the world, and it is also a common problem faced by technicians in the field. Unresolved issues. Small bolts, big accidents, and frequent accidents due to bolt breakage, such as cars

The engine's connecting rod bolt breakage caused the cylinder accident; the accident of 1 death and 4 injury caused by the break of the Harbin tower crane bolt occurred on April 18, 2009; according to the Taiwan media report, the No. 1 reactor of the No. 2 nuclear power plant detected 7 anchors. Accidents that may cause nuclear safety due to bolt breakage and damage; the fatigue of the middle pillar bolts of the No. 5 cockpit support system occurred at 16:45 on June 29, 2012, causing the "Space Trek" entertainment project in OCT East Shenzhen A major safety accident involving 6 deaths and 10 injuries; as a representative manufacturer of high-end vehicles, due to the inability to solve the technical problem of screw breakage, the BMW engine recalled 230,000 vehicles due to the momentary loss of power failure due to screw break (BMW (China) Automobile Trading Co., Ltd. and BMW Brilliance Automotive Co., Ltd. decided to recall 230,000 vehicles since June 18, 2014. The manufacturers suffered huge economic losses and loss of goodwill. More seriously, they will cause the safety of life and property of the owners. In addition, there are many safety accidents every year in the world due to the failure of threaded connections. The examples are numerous.

Summary of the invention

The technical problem to be solved by the present invention is to overcome the problems in the threaded connection technology of the nuts and bolts of the detachable mechanical static coupling which are widely used in the world. That is to say, ordinary nuts and bolts rely on static friction to connect objects together. In the case of large loads, especially in the case of large axial loads or large vibrations or high temperature or high temperature cross-changes, the connection of the above structures is prone to failure and cause accidents.

In order to solve the above technical problems, the present invention provides a shrink connection assembly, a shrink connection structure, and a connection method, which are connected together by an abutting force in an axial direction, even when the load is particularly large, particularly an axial load is particularly large. Or the vibration is particularly large, or the high temperature or high and low temperature cross change and other harsh occasions, the connection will not fail, the connection is very reliable, and can be used instead of the bolt and nut.

A shrink connection assembly embodying the present invention comprises a shrink sleeve composed of a contraction member connecting two or more flaps and a core rod, and a sleeve for driving the shrink sleeve to shrink, and the sleeve and the sleeve are completely contracted to prevent the sleeve and a stop mechanism for loosening the sleeve;

The connecting core rod is provided with a shrinking member resisting portion for axially resisting the shrink sleeve; and a positioning resisting portion is disposed on an outer circumference of one end portion of the connecting core rod;

The shrinking member includes a shrinking body, and a shrinking tapered surface disposed outside the shrinking body body for driving the shrink sleeve to shrink;

a connecting core rod accommodating space is disposed in the shrink sleeve; a shrink sleeve accommodating space is disposed in the sleeve, and a driving cone matched with the shrinking tapered surface of each flap shrinking member is disposed on the wall of the shrink sleeve accommodating space surface.

As an improvement of the first solution, the shrinking member abutting portion is an annular abutting groove or a resisting recess portion which is disposed on the connecting core rod and axially resists the end surface of the positioning resisting portion of the shrinking member facing away from the connecting core rod; the annular resisting groove or the resisting concave portion The axial length is greater than or equal to the axial length of the shrinking member and the mating portion thereof, and the annular abutting groove or the groove wall of the abutting recess away from the positioning abutting portion forms a resisting wall axially resisting the contracting member.

The shrinking member resisting portion is an annular annular abutting groove or a resisting concave portion disposed on the connecting core rod, and the concave portion is not required to be processed on the shrink sleeve, and the annular concave portion is directly formed by the diameter change of the different portions of the connecting core rod; There is no need to process the resisting projections on the shrinking members to cooperate with the recessed recesses; the advantage is that on the one hand, the manufacturing cost of connecting the core rod and the shrinking member is greatly reduced, and on the other hand, since the axial connecting force acts directly on the entire shrinking member, It does not act on the resisting projection and the resisting recess first to be transmitted to the shrinking member, so that the bearing capacity of the shrink joint assembly can be greatly improved.

As an improvement of the first solution, the shrinking member resisting portion is an abutting convex portion disposed on the outer circumference of the connecting core rod, and the inner side of the shrinking member body is provided with an abutting concave portion that cooperates with the resisting convex portion; the resisting concave portion is disposed at the connecting core The rod accommodates the wall of the space.

As an improvement of the third embodiment, the resisting protrusion is an independent spherical shape, or a cylindrical shape or a block-shaped protrusion protruding from the outer circumference of the connecting core rod; the resisting concave portion is a spherical convex abutting convex portion. The mating cylindrical side through hole, or a cylindrical side through hole that cooperates with the cylindrical abutting projection, or a side through hole that engages with the block-shaped first abutting projection outer contour.

The resisting recess is a side through hole, which is convenient to process and has low processing cost. The connecting core rod of this structure can be cast and formed.

As an improvement of the first solution, the connecting core rod further comprises a straight light rod portion connected to the big end of the driving cone surface, the axial length of the straight light rod portion is larger than the axial length of the driving cone surface; and the shrink sleeve is completely contracted, and the connecting rod is connected There is a set distance between the driving taper surface and the corresponding shrinking taper on the shrink sleeve in the axial direction.

There is a set distance between the driving taper surface and the corresponding shrinking taper surface on the shrink sleeve in the axial direction. Therefore, it can be set that the sleeve continues to slide over the shrink sleeve after the shrink sleeve is completely contracted. With this structure, in the working state, even if the sleeve is partially displaced in a direction opposite to the direction in which the sleeve drive shrink sleeve contracts, the shrink sleeve will continue to be in a contracted state, thereby ensuring the shrink sleeve in a bad working environment. Stay in a fully contracted state. That is, it is ensured that the resisting projection is held in the resisting recess, so that the use is very reliable, and there is no safety accident in which the shrink connection assembly fails.

As an improvement of the first solution, the inner spring is further provided, and an inner spring accommodating groove is radially disposed on the wall of the connecting core connecting space of the shrink sleeve and the connecting core rod, and the shrink sleeve is not mounted to the connecting core rod Before the upper part, the shrink sleeve is installed in the sleeve, and the shrink sleeve is resisted in the sleeve by the elastic force of the inner spring radially outward, and the inner spring is completely accommodated in the inner spring receiving groove.

In this way, the shrink sleeve and the sleeve are installed together at the factory before the shrink sleeve is yet mounted on the connecting mandrel, and will not be scattered during transportation. When used, the shrink sleeve and sleeve that are installed together are equivalent to nuts and connecting cores. The rod is equivalent to a screw. When installing, the connecting rod is provided with one end of the connecting rod to pass through the connected component, and the shrink sleeve and the sleeve which are mounted together are mounted on the connecting core rod, and the installation is very convenient.

As an improvement of the first solution, the outer spring is further provided with an outer spring receiving groove radially on the outer peripheral surface of each of the contracting members, and the contracting members of the two or more flaps are held together by the outer spring to form a shrink sleeve, and the outer spring is completely accommodated. Placed in the outer spring receiving groove.

The outer spring is used to install the shrinking parts of two or more flaps to form a shrink sleeve so as not to be separated. The shrink sleeve is assembled at the factory and does not spread during transportation, and is convenient, quick and simple to use.

As an improvement of the first solution, the limiting mechanism is a thread locking mechanism, comprising a threaded portion axially disposed on the connecting core body, and a threaded hole disposed on the sleeve and communicating with the shrink sleeve receiving space; the thread of the sleeve The hole cooperates with the threaded portion of the core rod to secure the sleeve to the connecting core rod, thereby locking the shrink sleeve in the sleeve and connecting the core rod in a fully retracted state of the shrink sleeve.

The outer peripheral surface of the sleeve provided with the threaded hole is generally hexagonal. The threaded hole of the shrink sleeve cooperates with the threaded portion of the connecting mandrel, which is particularly convenient to install. It is only necessary to pass the connecting core rod through the connected component, and then install the shrink sleeve and the sleeve on the connecting core rod, rotate the sleeve, and sleeve The cartridge drive shrink sleeve shrinks so that the crimped connection assembly can connect the connected components together. The connecting core rod is provided with a resisting protruding portion and a threaded portion, which can be completed in one clamping process, thereby reducing the cost; the threaded hole on the sleeve is also convenient to process, and the processing cost is also low.

As an improvement of the first solution, the shrink sleeve housing space includes a driving taper surface and a column hole connected to the large end of the driving taper surface, and a resisting portion is radially protruded on the hole wall of the column hole of the shrink sleeve receiving space; the shrink sleeve The utility model further comprises a cylinder surface which is connected with the large end of the shrinking conical surface and cooperates with the column hole of the shrink sleeve receiving space, and an abutting groove which cooperates with the resisting portion on the sleeve is provided on the outer circumference of the shrink sleeve.

The spring force of the inner spring applies a radial abutting force toward the sleeve to the sleeve, and the abutting portion applies an axial abutting force to the shrink sleeve, thereby making the shrink sleeve more securely mounted within the sleeve. The resisting groove should be set relatively shallow, and the resisting portion can be inserted into the resisting groove a little bit.

As an improvement of the first solution, the shrink sleeve housing space further includes a column hole connected to the small end of the driving taper, the shrink sleeve further comprising a cylinder surface matched with the column hole, and the end portion of the cylinder protruding sleeve is radially outward The convex portion is provided with a limiting portion for restraining the shrink sleeve on the sleeve; in a state where the shrink sleeve is opened by the inner spring, the maximum outer diameter of the limiting portion is larger than the diameter of the cylindrical hole of the shrink sleeve receiving space; the shrink sleeve passes The elastic force of the inner spring outwardly in the radial direction, the limiting portion and the contracting cone face the two opposite directions of the axial direction of the shrink sleeve and the sleeve is mounted together; the limiting mechanism comprises a sleeve and a contraction The threaded hole that is connected to the space is disposed on the threaded portion of the outer circumference of the shrink sleeve, and the threaded hole of the sleeve is disposed on the hole wall of the shrink sleeve receiving space, and the threaded hole of the sleeve cooperates with the threaded portion of the shrink sleeve The barrel is secured to the shrink sleeve so that the shrink sleeve is locked in the sleeve and attached to the core rod in a fully retracted state of the shrink sleeve.

The shrink sleeve is mounted to the sleeve by the elastic force in the radial direction of the inner spring, the limiting portion and the contracting cone facing the axial direction of the shrink sleeve in two opposite directions, thereby mounting the shrink sleeve and the sleeve The parts are not separated, so that the shrink sleeve and the sleeve are assembled in the factory beforehand, and will not be scattered during transportation. When used, the shrink sleeve is placed on the connecting core rod, and the axial direction force is applied to the sleeve to make the shrink sleeve. After fully shrinking, the threaded portion of the shrink sleeve is threadedly engaged with the threaded hole of the sleeve to fix the sleeve and the shrink sleeve together, so that the shrink sleeve is locked and fixed in the sleeve and connected in the fully contracted state of the shrink sleeve. The core rod is also easy to install and easy to operate.

As an improvement of the first solution, the utility model further comprises a round pipe; the limiting mechanism is a thread locking mechanism, comprising a threaded hole disposed on the sleeve and communicating with the shrink sleeve receiving space, and the threaded hole disposed on the outer circumferential surface of the circular pipe and the sleeve The threaded portion of the fitting; a single-lobed shrinking member is disposed on the side wall of the circular tube to accommodate the side hole.

As a modification of the first aspect, a first contraction expansion projection for contracting and expanding the shrink sleeve is protruded on the outer circumference of the shrink sleeve, and the first contraction expansion projection includes a contraction taper for the first contraction expansion. The side of the projection facing away from the conical surface of the contraction forms a conical recessed portion for expansion of the expansion sleeve, and the conical surface of the constriction sleeve coincides with the taper direction of the conical recessed portion for expansion; the shrink sleeve housing space includes a first contraction expansion accommodating groove that cooperates with the first contraction expansion projection, and the two groove walls of the first contraction expansion accommodating groove form a drive for contracting the shrink sleeve and engaging the contraction taper surface of the shrink sleeve The tapered surface and the expansion taper for engaging the expansion sleeve and the expansion recessed portion of the shrink sleeve.

The conical recessed portion for expansion and the tapered taper for expansion are provided, and when disassembled, the conical recessed portion for expansion on the shrink sleeve cooperates with the taper surface for expansion on the shrink sleeve to shrink the shrink sleeve and disassemble It is easy and more reliable, ensuring that the shrink sleeve will not be damaged during the disassembly process.

As a modification of the above aspect, the sleeve includes a first sleeve and a second sleeve; the first shrink-expansion receiving groove that cooperates with the first contraction expansion projection is formed on the first sleeve; and the limiting mechanism is a thread locking mechanism comprising a threaded portion disposed on an outer circumference of the first sleeve, a threaded hole provided on the second sleeve to engage a threaded portion of the first sleeve; and a shrink sleeve a second contraction expansion protrusion symmetrical with respect to the center position of the first contraction expansion projection is further provided on the outer circumference, and the shrink sleeve accommodation space further includes a second contraction disposed on the second sleeve The second shrink-expansion accommodating groove is provided by the expansion projection.

As an improvement of the first solution, the limiting mechanism is a limiting member installed between the sleeve and the connecting core rod. The limiting mechanism is a limiting member installed between the sleeve and the connecting core rod, and has a simple structure and low cost.

As an improvement of the above solution, the limiting mechanism is a first circlip.

The locking mechanism is a thread locking mechanism; and a second circlip spring is provided to prevent the thread locking mechanism from reversing.

As an improvement of the first solution, a second circlip spring is provided to prevent the reverse rotation of the thread locking mechanism, and the working sleeve completely ensures that the shrink sleeve is in a fully retracted state, thereby completely ensuring that the connection of the shrinking connection assembly is completely reliable in the working state. To be foolproof.

As an improvement of the first embodiment, an axial ridge or a recess is provided on the outer side of each of the contracting members, and the contracting taper is disposed on the rib or the recess of the contracting member; and the sleeve is provided with a contracting member for each flap The upper rib-fitted recess or the rib that cooperates with the recess on each of the flaps, the drive taper is disposed on the sleeve ridge or recess.

A rib with a tapered taper is provided on the shrinking member, and a recessed portion with a driving taper surface is provided on the sleeve, and the diameter of the through hole on the connected member and the hole diameter of the hole on the connected member are unchanged. In the case of the ribs on the shrinking member, the ribs are added, thereby greatly increasing the axial load that the shrink sleeve can bear; the ribs with the driving taper surface are provided on the sleeve, and the belt is provided on the shrinking member. The shrinking concave portion of the tapered surface can greatly increase the thickness of the shrinking member when the diameter of the through hole of the connected member and the hole diameter of the hole on the connected member are constant, thereby greatly increasing the axis of the shrink sleeve. To the load.

As an improvement, the connecting core rod is a connecting member that only functions as a connection, and the positioning resisting portion is provided on the outer circumference of one end of the connecting core rod to form a connecting core rod head; two or more connected elements are connected.

As a common improvement of one to seventeen, the connecting core rod is a stepped connecting shaft on the mechanical device; the connected element is one or more mechanical parts mounted on the connecting shaft; the positioning resisting portion is a step surface on the connecting core rod.

The connecting core rod is a connecting shaft of the mechanical device, the resisting force of the resisting recessed portion which protrudes into the shrink sleeve by the resisting recessed portion on the connecting shaft, the resisting force of the positioning resisting portion against the mechanical part, and the resistance of the shrink sleeve to the mechanical part The force fixes the mechanical parts on the connecting shaft, and fixes the mechanical parts with respect to the direct use of the nut and the threaded portion on the connecting shaft, can withstand a large axial force, the connection is more reliable, and the connecting shaft is not easily damaged.

As an improvement of the above solution, the outer circumference of the connecting core body is provided with a shrink sleeve abutting portion on each of the two sides of the connecting rod body, and a shrink sleeve matched with the shrink sleeve is arranged on each of the shrink sleeve retaining portions, and the sleeve matched with the shrink sleeve, and The shrink sleeve is fully contracted to prevent the sleeve and the shrink sleeve from loosening.

a shrink connection structure, further comprising two or more connected elements, wherein the connected elements are provided with through holes for cooperating with the connecting core rod;

The connecting core rod is a connecting member only for connecting, and the positioning resisting portion is disposed on the outer circumference of one end of the connecting core rod to form a connecting core rod head;

The connecting core rod is provided with a through hole for resisting one end of the protruding portion through all the connected elements, and the connecting core rod is provided with a portion protruding from the protruding portion to protrude the connected member;

The shrink sleeve is mounted on the connecting core rod, the sleeve is mounted outside the shrink sleeve, the positioning resisting portion of the connecting core rod is axially resisted by a connected member opposite thereto, and the shrink sleeve is axially resisted by the other connected member opposite thereto Two or more connected components are abutted together, and the resisting projections of the connecting core rod are opposite to the corresponding resisting recesses of the shrink sleeve;

When the shrink sleeve is fully contracted, the resisting projection of the connecting core rod extends into the corresponding resisting recess of the shrink sleeve, and the surface and the surface resist each other to form a snap, and the limiting mechanism prevents the sleeve and the shrink sleeve from being loosened, so that the shrink sleeve is retained. In the fully contracted state; in the fully contracted state of the shrink sleeve, the positioning resisting portion of the connecting core rod axially resists a connected member opposite thereto, and the shrink sleeve is axially resisted against the other connected member opposite thereto, and the shrink connection assembly will More than two connected components are connected and fixed together.

As an improvement of the above solution, the shrink connection structure further comprises a wave spring or a spring washer which is sleeved on the connecting core rod and eliminates the axial gap, and the wave spring or the elastic washer is installed between the positioning resisting portion and the connected member, or is mounted in the contraction. Between the set and the connected component.

The wave spring or the elastic washer can eliminate the gap caused by the matching requirement and the machining error of the resisting projection on the connecting mandrel and the resisting recess on the shrink sleeve, so that the contraction connecting component and the connected component are in the axial direction of the connecting core rod Tight fit, the connection is better.

a shrink connection structure, further comprising more than one connected component, the connected component being a mechanical component;

The connecting core rod is a stepped connecting shaft on the mechanical device; the positioning resisting portion is a step surface on the connecting core rod;

Providing a through hole for the mechanical part to cooperate with the connecting core rod;

The connecting core rod is provided with a hole for resisting one end of the protruding portion to pass through the mechanical part, the mechanical part is axially resisted by the positioning resisting portion of the connecting core rod, and the connecting core rod is provided with a partially protruding mechanical part that resists the protruding portion;

The shrink sleeve is mounted on the connecting core rod, and the sleeve is installed outside the shrink sleeve. The shrink sleeve is resisted by the surface of the mechanical part facing away from the positioning resisting portion, and the positioning resisting portion, the shrink sleeve and the mechanical part are abutted together to resist the recessed portion. Aligning with the corresponding resisting projection;

When the shrink sleeve is fully contracted, the resisting projection of the connecting core rod extends into the corresponding resisting recess of the shrink sleeve, and the surface and the surface resist each other to form a snap, and the limiting mechanism prevents the sleeve and the shrink sleeve from being loosened, so that the shrink sleeve is retained. In the fully contracted state; in the fully contracted state of the shrink sleeve, the positioning resisting portion of the connecting core rod axially resists the mechanical component and the opposite surface thereof, and the shrink sleeve pair axially resists the mechanically opposite surface thereof, the shrink sleeve, the sleeve, The limiting mechanism fixes the mechanical parts to the connecting core rod.

a shrink connection structure comprising two or more connected elements of a shrink connection assembly, wherein the connected elements are provided with through holes that cooperate with the connecting core rod;

The shrink connection assembly comprises a connecting sleeve, a shrink sleeve composed of two or more flaps and a shrinking member for connecting the core rod, and a sleeve for driving the shrink sleeve to shrink, and the sleeve and the shrink sleeve are prevented from being loosened when the shrink sleeve is fully contracted. mechanism;

a positioning abutting portion is disposed on an outer circumference of one end end of the connecting core rod; a resisting concave portion or an annular abutting groove is disposed on an outer circumference of the other end end portion of the connecting core rod, and an axial length of the annular resisting groove or the resisting concave portion is greater than or Equal to the axial length of the shrinking member and its mating portion;

An end of the connecting core rod away from the positioning resisting portion passes through all the through holes of the connected component, and the annular resisting groove or the resisting concave portion of the connecting core rod protrudes from the connected component;

The shrinking member is mounted on the annular resisting groove or the resisting recess of the connecting core rod, the sleeve is mounted outside the shrink sleeve, and the positioning resisting portion of the connecting core rod is axially resisted by a connected component opposite thereto, and the shrink sleeve is opposite to the opposite One of the connected elements is axially resisted, and the two or more connected elements are abutted together, and the shrink sleeve is opposite to the annular resisting groove of the connecting core rod;

When the shrink sleeve is fully contracted, the shrinking member protrudes into the annular resisting groove, and the shrinking member engages the annular resisting groove or the resisting recess to form a shrink sleeve. The end of the shrinking member facing away from the positioning resisting portion is annularly resisting the groove or the groove wall of the recessed portion. Resisting, one end of the shrinking member facing the positioning resisting portion is resisted by the opposite connected member; the limiting mechanism prevents the sleeve and the shrink sleeve from being loosened, and the shrink sleeve is maintained in a fully contracted state; the positioning resisting portion of the connecting core rod is opposite thereto One of the connected elements is axially resisted, the shrink sleeve is axially resisted by the other connected element opposite thereto, and the shrink connection assembly secures the two or more connected elements together.

A connection method of a shrink connection structure, the shrink connection structure further comprising two or more connected elements; and a through hole that is matched with the connecting core rod is provided on the connected elements;

Connection methods include:

The connecting core rod is provided with a through hole for blocking one end of the protruding portion through all the connected elements, and the connecting core rod is provided with a portion protruding from the protruding portion to protrude the connected member, and the positioning resisting portion and the connected member are abutted together ;

The shrink sleeve, the connecting core rod and the sleeve are mounted together, the shrink sleeve is mounted on the connecting core rod, the sleeve is mounted outside the shrink sleeve, the shrink sleeve protrudes from the sleeve toward the side of the connected component and abuts against the connected On the component, the wedge-shaped projection on the shrink sleeve is opposite to the corresponding resisting recess on the connecting core rod;

The sleeve drive shrink sleeve shrinks, and each flap shrinks radially, and the resisting projection of the shrinking member protrudes into the corresponding resisting recess of the connecting core rod, and the surface and the surface resist each other to form a snap, until the shrink sleeve is no longer radial. Movement, the shrink sleeve is in a fully contracted state, the sleeve stops moving or continues to slide relative to the shrink sleeve for a certain distance to stop the movement; the limit mechanism acts on the sleeve to prevent the sleeve and the shrink sleeve from loosening, so that the shrink sleeve remains in a fully contracted state ;

In the fully contracted state of the shrink sleeve, the resisting projection of the connecting core rod extends into the corresponding resisting recessed portion of the shrink sleeve. The surface and the surface resist each other to form a snap fit, and the shrink sleeve is mounted with the connecting core rod, and the shrink sleeve is opposite thereto. The connected component is axially resisted, and the positioning resisting portion of the connecting core rod axially resists the connected connecting member, and the shrinking connecting assembly is fixedly coupled with the connected component.

A joining method of a shrink joint structure, the shrink joint structure further comprising more than one mechanical part;

Connection methods include:

The mechanical component is mounted on the connecting core rod from one end of the connecting core rod with the resisting protruding portion, and the connecting core rod is provided with a portion protruding from the protruding portion to protrude the connected component, and the positioning resisting portion and the connected component are abutted together ;

The sleeve drive shrink sleeve shrinks, and each of the shrink sleeves moves radially, and the resisting projections of the shrinking members extend into the corresponding resisting recesses of the connecting core rods, and the surface and the surface resist each other to form a snap until the shrink sleeves no longer move radially. The shrink sleeve is in a fully contracted state, the sleeve stops moving or continues to slide relative to the shrink sleeve for a certain distance to stop the movement; the limiting mechanism acts on the sleeve to prevent the sleeve and the shrink sleeve from loosening, so that the shrink sleeve remains in a fully contracted state;

A connection method of a shrink connection structure, the shrink connection structure further comprising one or more connected elements, wherein the connected elements are provided with through holes that cooperate with the connecting core rod;

The limiting mechanism is a thread locking mechanism, comprising a threaded portion axially disposed on the connecting core rod body, and a threaded hole disposed on the sleeve and communicating with the shrink sleeve receiving space;

Connection methods include:

The connecting core rod is provided with one end of the connecting rod passing through the connected component, and the connecting core rod is provided with a portion protruding from the protruding portion to protrude the connected component, and the positioning resisting portion and the connected component are abutted together;

The shrink sleeve, the connecting core rod and the sleeve are mounted together, the shrink sleeve is mounted on the connecting core rod, the sleeve is mounted outside the shrink sleeve, and the shrink sleeve protrudes from the side of the connected component;

Rotating the sleeve through the threaded hole in the sleeve to threadably engage the threaded portion on the connecting mandrel body, the sleeve moves toward the connected component, and when the shrink sleeve contacts the connected component, the wedge-shaped projection on the shrink sleeve Corresponding to the corresponding resisting recess on the connecting core rod;

Then, the sleeve is driven to rotate, and the driving taper surface of the sleeve slides with respect to the contraction of the shrink sleeve. The shrink sleeve is contracted by the connecting member against the axial direction only in the radial direction, and the resisting projection on the connecting rod is connected. The resisting recess extending into the shrink sleeve forms a snap by the surface and the surface resisting each other until the shrink sleeve is no longer moved radially, the shrink sleeve is in a fully retracted state, the sleeve stops rotating or continues to rotate to continue the sleeve relative to the shrink sleeve Sliding a distance to stop the movement;

The threaded hole on the sleeve and the threaded portion on the connecting mandrel body are threaded to prevent the sleeve and the shrink sleeve from being loosened, so that the shrink sleeve is maintained in a fully contracted state;

The shrink connection assembly further includes a round pipe; the limit mechanism is a thread locking mechanism, and includes a threaded hole disposed on the sleeve and communicating with the shrink sleeve receiving space, and the thread disposed on the outer peripheral surface of the round pipe to cooperate with the threaded hole of the sleeve a portion of the side wall of the circular tube is provided with a single-lobed constriction for accommodating the side hole;

Connection methods include:

The shrink sleeve, the sleeve, the round tube and the connecting core rod are installed together; the single-lobed shrinking member is installed in the corresponding single-lobed shrinking member receiving side hole of the round tube, and the round tube and the shrink sleeve installed together are installed Connecting the core rod, the sleeve is mounted outside the circular tube and the shrink sleeve, the shrink sleeve protrudes from the sleeve toward the side of the connected component and abuts against the connected component, and the wedge-shaped projection and the connecting core rod on the shrink sleeve Correspondingly resisting depressions are opposite;

Rotating the sleeve, threaded through the threaded hole in the sleeve with the threaded portion on the circular tube, and the sleeve moves toward the connected component, The driving taper surface of the sleeve slides with respect to the contraction of the shrink sleeve, and the shrink sleeve is contracted by the connecting member against the axial direction only in the radial direction, and the resisting projection on the connecting core rod extends into the shrink sleeve. The recessed portion is formed by the surface and the surface resisting each other until the shrink sleeve is no longer moved radially, the shrink sleeve is in a fully contracted state, and the sleeve stops rotating or continues to rotate, so that the sleeve continues to slide relative to the shrink sleeve for a certain distance to stop moving;

Thread-locking through the threaded hole in the sleeve and the threaded portion on the circular tube prevents the sleeve and the shrink sleeve from being loosened, so that the shrink sleeve is maintained in a fully contracted state;

The limiting mechanism is a limiting member installed between the sleeve and the connecting core rod;

Connection methods include:

Applying an axial force to the sleeve in the direction of the connected component, the sleeve moves in the direction of the connected component, and the shrink sleeve is contracted in the radial direction by the movement of the connected component against the axial direction, and the resisting projection on the connecting rod is connected. The resisting recess extending into the shrink sleeve forms a snap by the surface and the surface resisting until the shrink sleeve no longer moves in a radial direction, the shrink sleeve is in a fully contracted state, the sleeve stops moving or continues to slide relative to the shrink sleeve for a certain distance to stop moving. ;

Reinstalling the upper limit mechanism, the limiting mechanism acts on the sleeve to prevent the sleeve and the shrink sleeve from being loosened, so that the shrink sleeve is maintained in a fully contracted state;

The shrink connection assembly further includes an inner spring and an outer spring; the inner spring receiving groove is radially disposed on the hole wall of the connecting core receiving space of the shrink sleeve and the connecting core rod, and the outer peripheral surface of the shrinking member of each flap Providing an outer spring receiving groove;

Connection methods include:

The shrinking member is held together by the outer spring to form a shrink sleeve, and the outer spring is completely accommodated in the outer spring receiving groove;

The inner spring is installed in the shrink sleeve, the inner spring is completely accommodated in the inner spring receiving groove, and the shrink sleeve with the inner spring and the outer spring is installed in the sleeve, and the elastic force radially outward by the inner spring will shrink The sleeve is resisted in the sleeve; or the shrink sleeve with the outer spring is installed in the sleeve, and the inner spring is installed in the shrink sleeve, the inner spring is completely accommodated in the inner spring receiving groove, and the inner spring diameter is passed The outward elastic force resists the shrink sleeve in the sleeve;

The connecting core rod is provided with one end of the connecting protruding portion passing through the connected component, and the connecting core rod is provided with a portion protruding from the protruding portion to protrude the connected component;

Mounting the sleeve and shrink sleeve mounted together on the connecting core rod; the shrink sleeve protrudes from the sleeve toward the side of the connected component and abuts against the connected component, and the wedge-shaped projection and the connecting core on the shrink sleeve Corresponding resisting recesses on the rod are facing each other;

The sleeve drive shrink sleeve shrinks, and the resisting projection on the connecting core rod extends into the shrink sleeve of the shrink sleeve to form a snap by the surface and the surface resisting until the shrink sleeve no longer moves in a radial direction, and the shrink sleeve is in a fully contracted state. The sleeve stops moving or continues to slide relative to the shrink sleeve for a certain distance to stop the movement; the limiting mechanism acts on the sleeve to prevent the sleeve and the shrink sleeve from loosening, so that the shrink sleeve is maintained in a fully contracted state;

In the fully contracted state of the shrink sleeve, the positioning resisting portion of the connecting core rod axially resists the connected member opposite thereto, the shrink sleeve is axially resisted by the opposite connected member, and the shrink joint assembly is fixedly coupled with the connected member.

The connecting method of the connecting structure is that when the factory sleeve and the shrink sleeve are installed together, the shrink connecting unit and the connecting fixed connecting member are connected, the connecting rod is equivalent to the screw, and the shrink sleeve and the sleeve are installed together. Equivalent to a nut, It is very simple and convenient to use.

The shrink connection assembly further includes an outer spring; an outer spring receiving groove is radially disposed on an outer peripheral surface of each of the contracting members;

Connection methods include:

The shrink sleeve is mounted on the connecting core rod, and the sleeve is mounted outside the shrink sleeve; the shrink sleeve protrudes from the side of the connected member and abuts against the connected member, and the wedge sleeve on the shrink sleeve protrudes The portion is opposite to the corresponding resisting recess on the connecting core rod;

The beneficial effects of the invention are:

In the fully contracted state of the shrink sleeve, the positioning resisting portion of the connecting core rod axially resists the connected member opposite thereto, and the other connected member opposite thereto is axially resisted by the shrink sleeve, and the shrink joint assembly is connected by the connecting member. Fixed together.

First, the connection force of the shrink connection assembly and the connected member in the shrink connection structure is caused by the axial abutting force acting on the connected member by the positioning abutting portion of the connecting core rod, and the abutting projection portion of the connecting core rod acts on The axial abutting force of the shrink sleeve, the axial sleeve resisting force of the shrink sleeve on the connected element, rather than the pre-tightening static friction force of the threaded connection, or the expansion static friction force of the shrink screw or the shrink bolt, the connection force is very large.

There is no pre-tightening force between the shrink sleeve and the connecting mandrel. Compared with the threaded connection, the shrink sleeve and the connecting core rod do not need to bear the preload load, so the load can be large, especially the axial load, vibration, high temperature and the like. Nothing will cause the connection to fail. Compared with the mechanical static connection using screws and bolt structures, it is advantageous to rely on the pre-tightening and static friction connection of the connected components, which can completely overcome the problems caused by excessive load, fatigue damage, creep under high temperature, fretting wear, etc. Several common forms of connection failure. Compared with the use of expansion screws or expansion bolts, only relying on expansion to generate a large radial static pressing force on the inner wall of the wall of the connected component, the static friction force generated by the radial pressing force has the advantage that the load is large or In the case of vibration, the connection will not be broken due to slight sliding friction. The invention completely breaks the static connection of the existing screw-connected screw or bolt mechanical static connection by the pre-tightening, the mechanical static connection of the expansion screw or the expansion bolt, the expansion static friction force caused by the contraction or the deformation caused by the deformation of the shrink sleeve Force to connect the inertial thinking of the object.

Secondly, the resisting projections of the connecting core rod are processed in advance, and are not formed by shrinkage deformation of the shrink sleeve. The shrink sleeve is designed to have two flaps (where the shrink sleeve is the best for the three flaps), and the shrink sleeve does not deform during the shrinking process. The advantage of this structure is that, firstly, the structure for resisting the protruding portion can be freely designed according to the force, so that it can bear a large external force as needed and the connection is reliable; secondly, the use range is wide, and the connected component is not required. The hardness of the material is much lower than the hardness of the material of the shrink joint assembly, and there is no need for a large friction coefficient between the shrink joint assembly and the connected component. It can be used as a substitute for screws or bolts, and can be used for aircraft, ships, equipment, aviation. Aerospace equipment, aircraft carriers, spacecraft, rockets, engines, nuclear reactors, trains, high-speed rail, railroad tracks, steel structures, steel bridges, automobiles, etc. are subject to large loads, especially axial loads, or very high temperatures or cold Thermal cross-change temperature, or connection of mechanical parts of critical parts in a working environment such as large vibration.

Thirdly, the positioning resisting portion of the connecting core rod is resisted by the connected component, and the shrink sleeve is contracted by the sleeve, so that the resisting projection on the connecting core rod resists the shrink sleeve, and the protruding protrusion and contraction on the connecting core rod The sleeve is not a threaded fit, and the shrink sleeve and the connecting rod do not loosen the slide (and do not reverse loose), so it is very reliable to connect the connected components through the shrink connection assembly. The sleeve only plays the role of contracting the shrink sleeve, and does not bear the connection force to be connected by the connecting member. The sleeve is fully contracted and the force of the sleeve is very small, even if the sleeve is screwed, it is almost impossible to cause The failure of the threaded connection, therefore the connection of the sleeve to the shrink sleeve or the connection of the sleeve to the connecting rod in the fully retracted state of the shrink sleeve It is also very reliable, and it is also easy to realize that the connecting mandrel is never detached and fixed on the shrink sleeve, so that the connection between the connected component and the connected component in the working state never falls off.

Fourth, since the shrink sleeve is not deformed during the shrinking process, the connecting core rod is not embedded in the shrink sleeve, and the radial connection force between the shrink sleeve and the connecting core rod is very small, and the shrink sleeve and the resisting projection portion of the connecting core rod are It is also almost impossible to damage in working condition; therefore, it is only necessary to disengage the sleeve from the retracted position during disassembly, and the shrinking member can be separated from the connecting core rod without a large force, and the shrinking connection assembly is not damaged when disassembled, nor It will damage the connected components, and the shrink-joined components can be reused many times, and the connected components will not be reworked or scrapped due to damage to the position where the shrink-joined components are connected.

Fifthly, when the connecting core rod is a connecting member that only functions as a connection, the positioning resisting portion is disposed on the outer circumference of one end of the connecting core rod to form a connecting core rod head, and the shrink connecting assembly can be designed as a standard part, and the connecting core rod is equivalent to a bolt The shrink sleeve and the sleeve are mounted together with respect to the nut, which is convenient to use and greatly reduced in cost. There is no need to machine the resisting structure on the connected components, further reducing costs. The connecting mandrel is a one-piece solid rod that can withstand greater forces than a hollow expansion sleeve.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of a shrink-joined assembly of Embodiment 1 of the present invention.

2 is a perspective exploded view of the shrink connection assembly of Embodiment 1 of the present invention.

Fig. 3 is a front elevational view showing the shrink-fit connection structure of the first embodiment of the present invention in a state in which the shrink sleeve is not contracted.

Fig. 4 is a cross-sectional view showing the rotation of A-A of Fig. 1;

Fig. 5 is a front elevational view showing the shrink-fit connection structure of the first embodiment of the present invention in a state in which the shrink sleeve is fully contracted.

Fig. 6 is a cross-sectional view taken along line B-B of Fig. 5;

Figure 7 is a perspective exploded view of the shrink connection assembly of Embodiment 2 of the present invention.

Figure 8 is a cross-sectional view showing the center position of one of the flap shrink members in the unfolded state of the shrink sleeve of the embodiment 2 of the present invention.

Figure 9 is a perspective exploded view of the shrink connection assembly of Embodiment 3 of the present invention.

Figure 10 is a cross-sectional view showing the center position of a shrink-fit joint of the embodiment 3 of the present invention in a state in which the shrink sleeve is not contracted.

Figure 11 is a perspective exploded view of the shrink connection assembly of Embodiment 4 of the present invention.

Figure 12 is a cross-sectional view showing the center position of a shrink-fit joint of the embodiment 4 of the present invention in a state in which the shrink sleeve is fully contracted.

Figure 13 is a perspective exploded view of the shrink connection assembly of Embodiment 5 of the present invention.

Figure 14 is a cross-sectional view showing the center position of one of the flap shrink members in the contraction joint of the embodiment 5 of the present invention in a state in which the shrink sleeve is fully contracted.

Figure 15 is a perspective exploded view of the shrink connection assembly of Embodiment 6 of the present invention.

Figure 16 is a cross-sectional view showing the center position of one of the flap shrink members in the contraction joint of the embodiment 6 of the present invention in a state in which the shrink sleeve is fully contracted.

Figure 17 is a cross-sectional view showing the center position of a shrink-fit joint of the embodiment 6 of the present invention in a state in which the shrink sleeve is not contracted.

Figure 18 is a cross-sectional view showing the center of the shrink-fit connection structure of the seventh embodiment of the present invention in a state in which the shrink sleeve is fully contracted.

Fig. 19 is an enlarged schematic view showing a portion I of Fig. 18;

Fig. 20 is an enlarged schematic view showing a portion II of Fig. 18;

Fig. 21 is an enlarged schematic view showing a portion III of Fig. 18;

detailed description

Example 1

As shown in FIG. 1 and FIG. 2, a shrink connection assembly 1 includes a shrink sleeve 4 composed of a shrinking member 3 for connecting the core rod 2, and a three-folded joint core rod 2, and a sleeve 5 for driving the shrink sleeve 4 to be contracted. a retaining mechanism, an inner spring 6, and an inner spring 7 for preventing the sleeve 5 and the shrink sleeve 4 from coming loose in a state where the shrink sleeve 4 is fully contracted.

As shown in Fig. 2, the connecting mandrel 2 comprises a stepped connecting mandrel body 8 formed by a cylindrical small rod 9 and a cylindrical large rod 12, connected to the small rod 9 and radially projecting the small rod 9 The threaded end 11 is radially protruded from the hexagonal head positioning resisting portion 13 connecting the end of the cylindrical large rod 12 of the core rod body 8, and is formed on the end surface of the threaded end 11 by a plurality of inverted L-shaped projections 14. The second card slot 15. Since the outer diameter of the small rod 9 is smaller than the outer diameter of the threaded end 11 and the diameter of the large rod 12, A resisting recess is formed on the connecting core rod 2.

As shown in FIGS. 2 and 3, the inner side wall of the shrink member 3 is a cylindrical curved surface 18. An inner spring receiving groove 33 and an inner spring receiving groove 32 are provided on the side wall of the cylindrical curved surface 18 of the shrinking member 3. The outer side wall of the shrink member 3 includes a conical curved surface 19 for contraction for driving the shrink sleeve 4, a cylindrical curved surface 20 connected to the large end of the conical curved surface 19 for contraction, and a constricted conical joint for connecting the small end to the cylindrical curved surface 20 The curved surface 21 is a cylindrical curved surface 22 connected to the large end of the conical curved surface 21 for contraction. The conical curved surface 19 for contraction and the conical curved surface 21 for contraction form a conical surface for contraction. A resisting groove 23 is provided on the cylindrical curved surface 20.

As shown in Fig. 2, the outer side wall of the sleeve 5 is a regular hexagon. A sleeve receiving space is provided in the sleeve 5, and a threaded through hole 24 communicating with the shrink sleeve receiving space is provided. A plurality of radial anti-rotation grooves 25 are provided on the end face of the sleeve 5 facing away from the positioning abutting portion 13. The limiting mechanism is a thread locking mechanism, which is a threaded end 11 connecting the core rod 2 and a threaded through hole 24 in the sleeve 5 threaded on the threaded end 11.

As shown in FIG. 2 and FIG. 3, the shrink sleeve housing space includes a tapered hole 26 whose small end is connected with the threaded through hole 24, a receiving cylindrical hole 27 connected to the large end of the tapered hole 26, and a small end and a receiving cylindrical hole 27. A connecting drive taper hole 28, a cylindrical bore 29 connected to the large end of the drive taper bore 28, and a drive taper bore 30 connected to the cylindrical bore 29 at the small end. The drive tapered bore 28 and the drive tapered bore 30 form a drive cone. A resisting portion 31 is formed inwardly of the hole wall of the cylindrical hole 29, and the resisting portion 31 is engaged with the resisting groove 23.

As shown in FIGS. 2 and 3, the cylindrical curved surface 18 of the shrinking member 3 that is held together forms a connecting core receiving space 41.

The three-lobed shrinking members 3 are all installed in the sleeve 5 at the factory, the resisting portion 31 is mounted in the resisting groove 23, the inner spring 6 is mounted in the inner spring receiving groove 32, and the inner spring 7 is mounted in the inner spring receiving groove 33. The inner spring 6 is completely received in the inner spring receiving groove 32, and the inner spring 7 is completely accommodated in the inner spring receiving groove 33, and the inner spring 6 and the inner spring 7 are elastically outwardly biased. 3 resists inside the sleeve 5. Thus, when the shrinking member 3 and the sleeve 5 are not attached to the connecting mandrel 2, the shrinking member 3 and the sleeve 5 are not automatically separated, and the shrinking members 3 are held together to form the shrink sleeve 4. The shrink sleeve 4 and the sleeve 5 thus mounted together are equivalent to the nut, and the connecting core rod 2 is equivalent to the screw, which is as simple as installing the screw and the nut in the field.

A shrink connection structure includes a shrink connection assembly 1, a connected member 34, and a connected member 35. A circular through hole 37 that is engaged with the connecting core rod 2 is provided on the connected member 34, and a circular through hole 38 that engages with the connecting core rod 2 is provided on the connected member 35.

The connecting core rod 2 is a connecting member that only functions as a connection. The positioning resisting portion 13 is disposed on the outer circumference of one end of the connecting core rod 2 to form a connecting core rod head, and the shrink connection assembly 1 is a shrink-fastening connection assembly. The second circlip 36 includes a circlip main body 39 that is disconnected in the middle, and a block-shaped rotation preventing portion 40 that protrudes from a side of the circlip main body 39 away from the disconnected position.

As shown in FIG. 3 and FIG. 4, in the uncontracted state of the shrink sleeve 4, the threaded end 11 of the connecting core rod 2 is sequentially passed through the circular through hole 38 of the connected member 35 and the circular through hole 37 of the connected member 34, and is positioned and resisted. When the portion 13 abuts against the connected member 35, the resisting groove 10 of the connecting core rod 2 protrudes from the connected member 34. The threaded through hole 24 of the sleeve 5 and the shrink sleeve 4 connected to the core rod accommodating space 41 are mounted on the connecting core rod 2 through the threaded end 11 of the connecting core rod 2, and the threaded through hole 24 of the sleeve 5 The threaded connection is on the threaded end 11 of the connecting mandrel 2, the positioning abutting portion 13 of the connecting mandrel 2 is axially resisted by the connected member 35 opposite thereto, and the shrink sleeve 4 is axially resisted by the other connected member 34 opposite thereto The connected member 35 and the connected member 34 abut each other, and the shrink sleeve 4 is opposite to the resisting groove 10 of the connecting core rod 2.

As shown in FIG. 5 and FIG. 6, in the fully contracted state of the shrink sleeve 4, the shrink sleeve 4 projects into the resisting groove 10 of the connecting core rod 2, and one end of the shrink sleeve 4 is resisted by the resisting groove 10 toward the wall of the threaded end 11, The other end is resisted by the connecting member 34, the shrink sleeve 4 is engaged with the resisting groove 10, and the threaded through hole 24 in the sleeve 5 is screwed on the threaded end 11 of the connecting core rod 2 for locking the sleeve 5 and The core rod 2 is connected, the sleeve 5 is radially resisted by the shrink sleeve 4, and the shrink sleeve 4 is fixed with the connecting core rod 2; the positioning resisting portion 13 of the connecting core rod 2 axially resists the connected member 35, and the sleeve is sleeved. 4 pairs of the connected members 34 axially resist, the shrink connection assembly 1 will be connected and fixed together by the connecting member 35 and the connected member 34. The thread locking mechanism prevents the sleeve 5 and the shrink sleeve 4 from coming loose, and the shrink sleeve 4 is maintained in a fully contracted state. The rotation preventing portion 40 of the second circlip spring 36 is mounted in the rotation preventing groove 25, and the circlip main body 39 is installed in the second locking groove 15 and is resisted by the second locking groove 15 on the connecting core rod 2, and the circlip main body 39 shaft To the resisting sleeve 5, the placement sleeve 5 is reversely released. The cylindrical curved surfaces 18 are distributed on the same circumferential surface, and are tightly fitted to the outer peripheral surface of the small rod 9 connecting the core body 8 by surface-to-surface contact. The diameter of the cylindrical curved surface 18 is equal to the outer diameter of the small rod 9.

The connection method in turn includes the following steps:

The three-ring shrinkage member 3 is mounted in the sleeve 5, the resisting portion 31 is mounted in the resisting groove 23, the inner spring 6 is mounted in the inner spring receiving groove 32, and the inner spring 7 is mounted in the inner spring receiving groove 33. The inner spring 6 is completely accommodated in the inner spring capacity In the groove 32, the inner spring 7 is completely accommodated in the inner spring receiving groove 33, and the shrinking member 3 is resisted in the sleeve 5 by the elastic force of the inner spring 6 and the inner spring 7; the above process is generally The factory is completed and can also be completed at the installation site;

The threaded end 11 of the connecting core rod 2 is sequentially passed through the circular through hole 38 of the connecting member 35, the circular through hole 37 of the connected member 34, the resisting groove 10 of the connecting core rod 2 protrudes from the connected member 34;

The threaded through hole 24 of the sleeve 5 and the connecting mandrel accommodating space 41 in the shrink sleeve 4 are mounted on the connecting mandrel 2 through the threaded end 11 of the connecting mandrel 2, and the threaded passage of the sleeve 5 The hole 24 is screwed onto the threaded end 11 of the connecting mandrel 2, the shrink sleeve 4 projects out of the sleeve 5 toward the side of the connected piece 34, and the axis facing the sleeve 5 is applied to the positioning abutting portion 13 of the connecting mandrel 2 To force, while rotating the sleeve 5, the sleeve 5 and the shrink sleeve 4 are moved synchronously to the connected member 34 until the shrink sleeve 4 abuts against the connected member 34, the sleeve 5, the shrink sleeve 4, the connected member 34, When the connecting member 35 and the positioning resisting portion 13 abut each other, the shrink sleeve 4 and the resisting groove 10 are facing each other;

Continuing to rotate the sleeve 5, the drive tapered bore 28 of the sleeve 5 slides over the conical curved surface 19 of the shrink sleeve 4, and the drive tapered bore 30 of the sleeve 5 slides over the conical curved surface 21 of the shrink sleeve 4 for contraction. The sleeve 5 drives the shrink sleeve 4 to contract, and each flap shrinkage member 3 only moves radially, and the shrink member 3 projects into the resisting groove 10 of the connecting core rod 2. One end of the shrink member 3 is resisted by the groove 10 toward the threaded end 11. The wall is resisted, and the other end is resisted by the connecting member 34 until the shrinking member 3 is no longer moved radially. The shrinking member 3 is engaged with the groove bottom of the resisting groove 10 and the small rod 9 forms a shrink sleeve 4, and the shrink sleeve 4 is in a fully contracted state. ;

The shrink sleeve 4 is in a fully retracted state, and the sleeve 5 is further rotated. The small end of the drive tapered bore 28 of the sleeve 5 passes over the large end of the conical curved surface 19 of the shrink sleeve 4, and the drive cone 30 of the sleeve 5 The small end of the contraction sleeve 4 is over the large end of the conical curved surface 21 of the shrink sleeve 4, and the sleeve 5 continues to slide relative to the shrink sleeve 4 for a distance to stop the rotating sleeve 5; the threaded connection of the sleeve 5 to the connecting rod 2 is locked. The sleeve 5 prevents the sleeve 5 and the shrink sleeve 4 from being loosened, so that the shrink sleeve 4 is maintained in a fully contracted state;

In the fully contracted state of the shrink sleeve 4, one end of the shrink sleeve 4 is resisted by the resisting groove 10 toward the wall of the threaded end 11, and the other end is resisted by the connected member 34, and the shrink sleeve 4 is engaged with the resisting groove 10 through the sleeve. The threaded through hole 24 in the 5 is screwed on the threaded end 11 of the connecting core rod 2 to lock the sleeve 5 and the connecting core rod 2. The sleeve 5 radially resists the limit of the shrink sleeve 4, so that the shrink sleeve 4 and the connecting core The rods 2 are fixed together; the sleeves 4 are axially resisted by the connecting members 34, the positioning abutting portions 13 of the connecting rods 2 are axially resisted by the connecting members 35, and the shrinking connection assembly 1 is to be connected by the connecting members 35 and the connected members 34. The connections are fixed together;

The rotation preventing portion 40 of the second circlip 36 is mounted in the rotation preventing groove 25.

To disassemble, the second circlip 36 is first removed from the second slot 15 and the sleeve 5 is rotated in the opposite direction.

Example 2

As shown in FIGS. 7 and 8, unlike the first embodiment, the connecting core rod 71 includes a stepped connecting core body formed of a cylindrical small rod 72 and a cylindrical large rod 73, and a small rod 72. The straight rod portion 74 of the connecting and radially protruding small rod 72 is radially protruded from the hexagonal head positioning resisting portion 75 at the end of the cylindrical large rod 73, and is annularly disposed on the outer circumference of the end portion of the straight rod portion 74. The first card slot 76. Since the outer diameter of the small rod 72 is smaller than the outer diameter of the straight rod portion 74 and the diameter of the large rod 73, the resisting groove 77 is formed on the connecting core rod 71.

The outer side wall of the shrink member 78 includes a conical curved surface 80 for contracting the contraction sleeve 79 for contracting, and a cylindrical curved surface 81 which is joined to the end surface of the conical curved surface 80 for contracting, and is connected to the large end of the conical curved surface 80 for contraction. The cylindrical curved surface 82 extends axially through the conical curved surface 80 for contracting and the recess 83 of the cylindrical curved surface 82. The cylindrical curved surface 81 is concentric with the cylindrical curved surface 82 and has a diameter smaller than the diameter of the small end of the conical curved surface 80 for contraction. The groove bottom of the groove 83 is a cylindrical curved surface 84 concentric with the cylindrical curved surface 82.

A sleeve accommodation space 86 is provided in the sleeve 85, and a circular through hole 87 communicating with the shrink sleeve accommodation space 86 is provided. The shrink sleeve housing space 86 includes a circular hole 88 that is in contact with the end surface of the circular through hole 87, and a drive tapered hole 89 whose small end is connected to the circular hole 88. A rib 90 that engages with the groove 83 is provided on the outer circumference of the circular hole 88 and the driving tapered hole 89. The aperture of the circular aperture 88 is larger than the aperture of the circular through hole 87 and greater than or equal to the diameter of the cylindrical curved surface 82.

The limiting mechanism is a first circlip 91 and a first slot 76 on the connecting core 71. The diameter of the circular through hole 87 in the sleeve 85 is larger than the outer diameter of the straight rod portion 74, and the diameter of the circular hole 88 is greater than or equal to the outer diameter of the cylindrical curved surface 82. The first circlip 91 is a broken ring shape.

When the shrink sleeve 79 is fully contracted, the first snap spring 91 is mounted in the first latching groove 76, and the sleeve 85 is axially resisted by the first retaining spring 91 to prevent the sleeve 85 and the shrink sleeve 79 from loosening and shrinking. The sleeve 79 remains in a fully contracted state.

The connection method is different from that of Embodiment 1:

The three-lobed shrink members 78 are all mounted in the sleeve 85, and the inner spring 92 is mounted in the inner spring receiving groove 93, the inner spring 94 is installed in the inner spring receiving groove 95, and the shrinking member 78 is resisted in the sleeve 85 by the elastic force of the inner spring 92 and the inner spring 94; the above process is generally completed at the factory or at the installation site.

The straight rod portion 74 of the connecting rod 71 is sequentially passed through the circular through hole 97 of the connecting member 96, the circular through hole 99 of the connected member 98, the resisting groove 77 of the connecting core rod 71 protrudes from the connected member 98;

The circular through hole 87 of the sleeve 85 and the connecting core receiving space 100 of the shrink sleeve 79 are mounted on the connecting core rod 71 through the straight rod portion 74 of the connecting core rod 71, and the shrink sleeve 79 faces the connected member One side of the sleeve 98 protrudes from the sleeve 85, and applies a relative axial force to the positioning resisting portion 75 of the connecting core rod 71 and the sleeve 85; the sleeve 85 and the shrink sleeve 79 move synchronously toward the connected member 98 until the shrink sleeve When the sleeve 85, the shrink sleeve 79, the connected member 98, the connected member 96, and the positioning resisting portion 75 abut against each other, the shrink sleeve 79 is opposite to the resisting recess 77;

Further applying an axial force in a relative direction to the positioning resisting portion 75 of the connecting core rod 71 and the sleeve 85, so that the shrink sleeve 79 is in a fully retracted state;

In the state in which the shrink sleeve 79 is fully contracted, the axial force of the sleeve 85 is continuously applied to the sleeve 85 until the end surface of the sleeve 85 passes over the first slot 76;

The first circlip 91 is mounted in the first slot 76, and the sleeve 85 and the connecting ferrule 71 are held in a fixed position by the first circlip 91 against the sleeve 85, thereby preventing the sleeve 85 and the shrink sleeve 79 from coming loose. The shrink sleeve 79 is maintained in a fully contracted state.

Example 3

As shown in FIGS. 9 and 10, unlike the third embodiment, the shrink connection assembly further includes an outer spring 120 and an outer spring 121. The straight rod portion 125 connected to the small rod 123 connecting the core rod 122 forms a resisting head portion.

The outer side wall of the shrink member 128 includes a constricted conical surface 129 for driving the shrink sleeve 151 to contract, a cylindrical curved surface 130 connected to the small end of the conical conical surface 129, and a large end connected to the conical curved surface 129 for contraction. a connecting curved surface 132 having an externally threaded portion 131, a conical curved surface 133 having a small end connected to the end surface of the connecting curved surface 132 and projecting the connecting curved surface 132, a cylindrical curved surface 134 connected to the large end of the conical curved surface 133, a large end and a cylindrical curved surface 130 connected conical curved surface 135, a plurality of inverted L-shaped protrusions 136 disposed on the end surface of the conical curved surface 135, and the protrusions 136 and the end surface of the conical curved surface 135 form a second clamping groove 137, which is disposed on the cylindrical curved surface An outer spring receiving groove 138 that cooperates with the outer spring 120 on the outer circumference of the 130, and an outer spring receiving groove 139 that is fitted to the outer spring 121 on the outer circumference of the cylindrical curved surface 134.

The sleeve 140 is provided with a shrink sleeve receiving space 141, a circular through hole 142 communicating with the shrink sleeve receiving space 141, and a rotation preventing groove 149 provided on the end surface of the sleeve 140. The shrink sleeve housing space 141 includes a tapered hole 143 having a small end connected to the circular through hole 142, a receiving hole 145 provided with the internal thread portion 144 connected to the large end of the tapered hole 143, and a driving cone connected to the receiving hole 145 at the small end. A hole 146, a cylindrical hole 147 connected to the large end of the driving tapered hole 146, and a tapered hole 148 whose small end is connected to the cylindrical hole 147. The limit mechanism is a thread locking mechanism, which is an external thread portion 131 on the shrink member 128 and an internal thread portion 144 that is screwed into the sleeve 140 on the male thread portion 131.

The inner spring 150 is mounted in the shrink sleeve 151. The inner spring 150 is completely received in the inner spring receiving groove 152, and the inner spring 153 is mounted in the shrink sleeve 151. The inner spring 153 is completely received in the inner spring receiving groove 154. Inside. The outer spring 120 is mounted outside the shrink sleeve 151, and the outer spring 120 is completely received in the outer spring receiving groove 138; the outer spring 121 is mounted outside the shrink sleeve 151, and the outer spring 121 is completely received in the outer spring receiving groove 139. The outer spring 120 and the outer spring 121 do not automatically separate the shrink members 128 that are held together to form the shrink sleeve 151. The shrink sleeve 151 to which the inner spring 150, the inner spring 153 and the outer spring 120 and the outer spring 121 are mounted is mounted in the sleeve 140, and the shrink sleeve 151 is resisted by the elastic force of the inner spring 150 and the inner spring 153 radially outward. Inside the canister 140. The above process is completed at the factory.

In the uncontracted state of the shrink sleeve 151, the straight rod portion 125 connecting the core rod 122 passes through the circular through hole 157 of the connected member 156, the circular through hole 159 of the connected member 158, and the resisting groove 124 of the connecting core rod 122 is convexly connected. Item 158. The circular through hole 142 of the sleeve 140 and the connecting core receiving space 160 of the shrink sleeve 151 are mounted on the connecting core rod 122 through the straight rod portion 125 of the connecting core rod 122, and the positioning of the connecting core rod 122 is resisted. The portion 127 is axially resisted by the connected member 156 opposite thereto, and the shrink sleeve 151 is axially resisted by the other connected member 158 opposite thereto, and the outer member 120, the outer spring 12, and the connected member 158 are abutted by the connecting member 156. Together, the shrink sleeve 151 is opposite the abutment groove 124 of the connecting core rod 122.

In the fully contracted state of the shrink sleeve 151, the shrink sleeve 151 extends into the resisting groove 124 of the connecting core rod 122 to form a snap, and the internal thread portion 144 of the thread locking mechanism and the external thread portion 131 are screwed together to prevent the sleeve 140 from being engaged. The shrink sleeve 151 is released and the shrink sleeve 151 is maintained in a fully contracted state. The second retaining spring 162 is mounted in the second latching groove 137 of the shrink sleeve 151 and the rotation preventing groove 149 of the sleeve 140 and resists the sleeve 140 by the second retaining spring 162.

The connection method in turn includes the following steps:

The inner spring 150 is mounted in the inner spring receiving groove 152, and the inner spring 153 is mounted in the inner spring receiving groove 154. The outer spring 120 is mounted in the outer spring receiving groove 138; the outer spring 121 is mounted in the outer spring receiving groove 139; the shrinking members 128 held together by the outer spring 120 are not automatically separately assembled to form the shrink sleeve 151 The shrink sleeve 151 to which the inner spring 150, the inner spring 153 and the outer spring 120 and the outer spring 121 are mounted is mounted in the sleeve 140, and the shrink sleeve 151 is resisted by the elastic force of the inner spring 150 and the inner spring 153 radially outward. Inside the sleeve 140; the above processes are generally completed at the factory or at the installation site;

The straight rod portion 125 connecting the core rod 122 is sequentially passed through the circular through hole 157 of the connecting member 156, the circular through hole 159 of the connected member 158, the resisting groove 124 of the connecting core rod 122 protrudes from the connected member 158;

The circular through hole 142 and the shrink sleeve 151 of the sleeve 140 that are mounted together are connected to the core rod accommodating space 160 through the straight rod portion 125 of the connecting core rod 122, and the shrink sleeve 151 faces the connected member 158. One side of the sleeve 140 protrudes from the sleeve abutting portion 127 of the connecting core rod 122 and the sleeve 140, and the sleeve 140 and the shrink sleeve 151 move synchronously to the connected member 158 until the shrink sleeve 151 When the sleeve 140, the shrink sleeve 151, the connected member 158, the connected member 156, and the positioning resisting portion 127 abut against each other on the connected member 158, the shrink sleeve 151 and the resisting groove on the connecting core rod 122 124 is right;

The positioning resisting portion 127 of the connecting core rod 122 and the sleeve 140 exert an axial force in a relative direction, and the driving tapered hole 146 of the sleeve 140 slides on the conical curved surface 129 of the shrink sleeve 151, and the sleeve 140 drives the shrink sleeve. 151 is contracted, and each of the flaps 128 is only moved radially, and the shrinking member 128 extends into the corresponding resisting groove 124 of the connecting mandrel 122 to form a snap until the shrink sleeve 151 is no longer moving radially, and the shrink sleeve 151 is fully contracted. status;

The shrink sleeve 151 is in a fully retracted state, and the sleeve 140 is continuously rotated. The small end of the drive tapered bore 146 of the sleeve 140 passes over the large end of the constricted curved surface 129 of the shrink sleeve 151, and the internal and external threads of the locking mechanism. Starting the threaded connection, the sleeve 140 continues to slide a distance relative to the shrink sleeve 151 until the second slot 137 on the shrink sleeve 151 stops the rotating sleeve 140 over the end surface of the sleeve 140;

The locking sleeve 140 and the shrink sleeve 151 are screwed through the internal thread portion 144 of the sleeve 140 and the external thread portion 131 of the shrink sleeve 151 to prevent the sleeve 140 and the shrink sleeve 151 from being loosened, so that the shrink sleeve 151 is fully contracted. ;

The second retaining spring 162 is mounted in the second latching slot 137 and resists the sleeve 140 by the second retaining spring 162 to prevent the sleeve 140 from reversing.

To disassemble, the second circlip 162 is first removed from the second slot 137, and the sleeve 140 is reversely rotated.

Example 4

As shown in FIG. 11 and FIG. 12, different from the fourth embodiment, the plurality of protruding portions 191 of the shrink sleeve 190 include a cylindrical curved surface 195 which is engaged with the circular through hole 194 connected to the shrink sleeve receiving space 192, and is cylindrical. The end of the curved surface 195 protruding sleeve 196 protrudes radially outwardly from a limiting portion 197 that limits the shrink sleeve 190 to the sleeve 196. In a state where the shrink sleeve 190 is installed in the sleeve 196 and is extended by the inner spring 198 and the inner spring 199, the maximum outer diameter of the limiting portion 197 is larger than the diameter of the circular through hole 194 connected to the shrink sleeve receiving space 192. The 190 is mounted to the sleeve 196 by the inner spring 198, the elastic force in the radial direction of the inner spring 199, the limiting portion 197 and the contracting cone facing the axially opposite directions of the shrink sleeve 190. The second card slot 200 is disposed on the first cylindrical curved surface 202 that is connected to the small end of the first constricted conical surface 201.

Example 5

As shown in FIGS. 16 and 17, unlike the fourth embodiment, the shrink connection assembly further includes a circular tube 220. An external thread portion 221 is disposed on the outer circumferential surface of the circular tube 220; a single-lobed contraction receiving side hole 223 is radially disposed on the side wall 222 of the circular tube 220 where the external thread portion 221 is not provided, and the end surface of the external thread portion 221 is provided. A protruding portion 224 is disposed on the upper portion, and a second locking groove 225 is defined in the protruding portion 224.

The shrink member 226 is a four-lobed. The outer side wall of the shrink member 226 includes a first constricted conical surface 228 for driving the shrink sleeve 227 to contract, a cylindrical curved surface 230 connected to the large end of the first constricted conical surface 228, and the small end is connected to the cylindrical curved surface 230. The second contraction is a conical curved surface 231, and a second cylindrical curved surface 232 connected to the large end of the second constricted conical curved surface 231. The inner side wall of the shrink member 226 includes a cylindrical curved surface 234 whose one end is engaged with the outer circumference of the side wall 222 of the circular tube 220, a cylindrical curved surface 237 that cooperates with the small rod 236 of the connecting core rod 235, and one end and the side wall 222 of the circular tube 220. The outer circumference of the cylindrical surface 238.

A sleeve receiving space 240 is provided in the sleeve 239, and a threaded through hole 241 communicating with the shrink sleeve housing space 240 is provided. The shrink sleeve housing space 240 includes a tapered bore 242 having a small end connected to the threaded through hole 241, a first cylindrical bore 243 connected to the large end of the tapered bore 242, and a first drive tapered bore 244 having a small end connected to the first cylindrical bore 243. With the first drive tapered hole A second cylindrical bore 245 connected at the large end of the 244 and a second driven tapered bore 219 having a small end connected to the second cylindrical bore 245. The limiting mechanism is a thread locking mechanism, which is a threaded through hole 241 in the sleeve 239 and an external threaded portion 221 screwed onto the circular tube 220 of the threaded through hole 241.

The connection method is different from the embodiment:

The single-lobed contracting member 226 is mounted in the corresponding single-lobed contracting member 226 of the circular tube 220 to receive the side hole 223, and the outer spring 246 and the outer spring 247 are mounted outside the contracting member 226 to cause the contracting member 226 to be held together to form a contraction. The sleeve 227; the inner spring 248 and the inner spring 249 are mounted in the shrink sleeve 227 to open the shrink sleeve 227 outwardly. In the uncontracted state of the shrink sleeve 227, the resisting projection 250 of the shrink sleeve 227 does not protrude from the round tube 220. The inner wall, the outer side wall 222 of the shrink sleeve 227 protrudes from the outer wall of the circular tube 220; the above process is generally completed at the factory or at the installation site;

The connecting core rod 235 is provided with one end of the connecting protrusion 250 passing through the circular through hole 252 of the connected member 251 and the circular through hole 254 of the connected member 253. The connecting core rod 235 is provided with a portion protruding from the protruding portion 250. Connected member 253;

The inner hole 255 of the circular tube 220 and the connecting core rod accommodating space 256 in the shrink sleeve 227 are passed through the connecting core rod 235, and one end of the resisting projection portion 250 is mounted on the connecting core rod 235, and the connection is made. The positioning abutting portion 257 of the core rod 235 and the sleeve 239 apply an axial force in a relative direction until the shrink sleeve 227 abuts against the connected member 253, the sleeve 239, the shrink sleeve 227, the connected member 253, and the connected member 251 When the positioning resisting portions 257 are abutted together, the resisting projections 250 on the shrink sleeve 227 are opposite to the corresponding resisting recess portions 258 of the connecting core rod 235;

Threading the threaded through hole 241 of the sleeve 239 on the external thread portion 221 of the circular tube 220;

The sleeve 239 is rotated to bring the shrink sleeve 227 into a fully retracted state.

Example 6

As shown in FIGS. 15 to 17, unlike the fourth embodiment, the outer surface of the expansion member 280 has an arc shape. A first contraction expansion projection 282 for contracting and expanding the shrink sleeve 281 is protruded from the outer surface of the expansion member 280, and is used for the second contraction expansion symmetrical with respect to the center position of the first contraction expansion projection 282. Projection 283. The first contraction expansion projection 282 includes a contraction tapered surface 284, and an expansion conical recessed portion 285 for expanding and contracting the sleeve 281 is formed on a side of the first contraction expansion projection 282 facing away from the contraction conical surface 284. The cylindrical connecting surface 286 of the converging tapered surface 284 and the expanding tapered recess 285 is joined. The contraction taper 284 of the shrink sleeve 281 coincides with the taper direction of the expansion tapered recess 285.

The inner side surface of the expansion member 280 includes a cylindrical curved surface 289 that cooperates with the small rod 288 of the connecting core rod 287 and a cylindrical curved surface 304 of the large rod 290 of the hollow connecting core rod 287, which connects the cylindrical curved surface 289 and the cylindrical curved surface 304. Connection face 291.

The sleeve includes a first sleeve 292 and a second sleeve 293.

The first sleeve 292 includes a cylindrical first sleeve body 294, a circular through hole 295 penetrating through the first sleeve body 294, and an external thread portion 296 disposed on the outer circumferential surface of the first sleeve body 294. The resisting portion 297 of the sleeve body 294 is disposed in the first shrink-up expansion receiving groove 298 of the first through-contracting projection 282 on the hole wall of the circular through-hole 295.

The second sleeve 293 includes a second sleeve body 299, a threaded counterbore 300 disposed in the second sleeve body 299, and a circular through hole 301 communicating with the threaded counterbore 300, protruding from the protrusion of the second sleeve body 299 302. A second shrinkage expansion accommodating groove 303 that is provided on the hole wall of the circular through hole 301 and that engages with the second contraction expansion projection 283.

The first sleeve 292 and the second sleeve 293 are threadedly coupled to the threaded counterbore 300 by an externally threaded portion 296. The second contraction expansion accommodating groove 303 and the first contraction expansion accommodating groove 298 are symmetrical about their center positions.

The limiting mechanism is a thread locking mechanism comprising an externally threaded portion 296 disposed on the first sleeve 292 and a threaded counterbore 300 disposed on the second sleeve 293.

Example 7

As shown in FIGS. 18 to 21, unlike the fourth embodiment, the connecting core rod is a stepped connecting shaft on the mechanical device; the connected member is a mechanical part 330, a mechanical unit 331, and a mechanical unit 332.

The connecting core rod includes a threaded portion 333, a second engaging groove 334 provided at an end of the threaded portion 333, a cylindrical portion 335 which is in contact with the threaded portion 333 and has a smaller diameter than the threaded portion 333, and is disposed on the outer peripheral surface of the cylindrical portion 335. Resisting the projection 336, the small end is in contact with the cylindrical portion 335 and protrudes from the conical portion 336 of the cylindrical portion 335. The tapered surface of the conical portion 336 forms a positioning abutting portion that is in contact with the large end of the conical portion 336 and A cylindrical portion 337 projecting from the conical portion 33, a cylindrical portion 338 that is in contact with the cylindrical portion 337 and smaller in diameter than the cylindrical portion 337, is in contact with the cylindrical portion 338 and protrudes from the cylindrical portion of the cylindrical portion 338 339, a cylindrical portion 340 which is connected to the cylindrical portion 339 and has a diameter smaller than that of the cylindrical portion 339, and a stepped surface between the cylindrical portion 339 and the cylindrical portion 340 forms a positioning resisting portion 341 which is in contact with the cylindrical portion 340 and has a diameter Less than cylinder The cylindrical portion 342 of the shaped portion 340, the abutting projection 343 disposed on the outer peripheral surface of the cylindrical portion 342, the threaded portion 344 that is in contact with the cylindrical portion 342, and the cylindrical portion 345 that is in contact with the threaded portion 344 are disposed. A second latching groove 346 on the cylindrical portion 345, which is in contact with the cylindrical portion 345 and has a diameter smaller than and smaller than the cylindrical portion 347 of the cylindrical portion 345, a stepped surface formed between the cylindrical portion 345 and the cylindrical portion 347 The positioning resisting portion 348, the cylindrical portion 349 that is in contact with the cylindrical portion 347 and has a smaller diameter and smaller diameter than the cylindrical portion 347, is provided on the outer circumferential surface of the cylindrical portion 349.

The mechanical component 330 is mounted on the conical portion 336 and is fixed by the shrink sleeve 351. The structure of the shrink sleeve 351, the sleeve 352 for driving the shrink sleeve 351, the second clip spring 353, and the like are the same as those of the first embodiment.

The mechanical assembly 331 is mounted on the cylindrical portion 340 and is fixed by the shrink sleeve 354, and the structure of the shrink sleeve 354, the sleeve 355 for driving the shrink sleeve 354, the second spring 356, and the like is the same as that of the first embodiment.

The mechanical assembly 332 is mounted on the cylindrical portion 347 and is fixed by the shrink sleeve 357. The structure of the shrink sleeve 357, the sleeve 358 for driving the shrink sleeve 357, the second spring 359, and the like is different from that of the fourth embodiment in that the protrusion is resisted. The portion 350 and the structure that resists the groove portion 360. The structure of the resisting projection 350 and the resisting recessed portion 360 is the same as that of the second embodiment.

The connection method differs from Embodiment 1 in that:

The mechanical component 330 is mounted on the conical portion 336 of the connecting shaft from one end of the connecting core rod with the resisting projection 336, and then fixed by the shrink sleeve 351 and the driving sleeve 352;

The mechanical component 331 is mounted on the cylindrical portion 340 of the connecting shaft from one end of the connecting core rod with the resisting projection 350, and then fixed by the shrink sleeve 354 and the driving sleeve 355;

The mechanical assembly 333 is attached to the cylindrical portion 347 of the connecting shaft from the end of the connecting core provided with the resisting projection 350, and is fixed by the shrink sleeve 357 and the driving sleeve 358.

Claims

A shrink-joining assembly, comprising: a connecting sleeve consisting of a connecting core rod, a shrinking sleeve composed of two or more flaps and a connecting core rod, and a sleeve for driving the shrink sleeve to shrink, and the sleeve and the sleeve are completely contracted to prevent the sleeve and a stop mechanism for loosening the sleeve;

The connecting core rod is provided with a shrinking member resisting portion for axially resisting the shrink sleeve; and a positioning resisting portion is disposed on an outer circumference of one end portion of the connecting core rod;

The shrinking member comprises a shrinking body, a shrinking tapered surface disposed outside the shrinking body for driving the shrink sleeve to shrink; a connecting core receiving space in the shrink sleeve; and a shrinkage in the sleeve The sleeve accommodating space is provided with a driving cone surface which cooperates with the contracting taper surface of each of the contraction members on the wall of the shrink sleeve housing space.
A shrink-fit connection assembly according to claim 1, wherein the shrink-receiving portion is an annular resisting groove disposed on the connecting core rod and axially resisting the end surface of the positioning resisting portion of the shrinking member facing away from the connecting core rod. Or resisting the recess; the axial length of the annular abutting groove or the resisting recess is greater than or equal to the axial length of the shrinking member and the mating portion thereof, and the annular abutting groove or the groove wall of the resisting recess away from the positioning resisting portion forms an axial resistance to the shrinking member Resist the wall.
A shrink-joined assembly according to claim 1, wherein the shrink-receiving portion is an abutting projection provided on an outer circumference of the connecting core rod, and the inner side of the shrinking member body is provided with a resisting projection portion. a matching recessed portion; the resisting recessed portion is disposed on a wall connecting the core rod accommodating space.
The shrink connection assembly according to claim 3, wherein the resisting projection is a single spherical shape, or a cylindrical shape or a block-shaped projection protruding from the outer circumference of the connecting core rod; The resisting recess is a cylindrical side through hole that cooperates with the spherical abutting protrusion, or a cylindrical side through hole that cooperates with the cylindrical abutting protrusion, or The block-shaped first abutting projection has an outer contoured side through hole.
The expansion joint assembly of claim 1 wherein said connecting mandrel further comprises a straight rod portion connected to said large end of said drive cone, said straight rod portion having an axial length greater than said The axial length of the driving taper; between the shrinking sleeve and the corresponding shrinking taper on the shrink sleeve
A shrink connection assembly according to claim 1, further comprising an inner spring, wherein the inner spring receiving groove is radially disposed on the hole wall of the connecting core receiving space of the shrink sleeve and the connecting core rod Before the shrink sleeve is not mounted on the connecting core rod, the shrink sleeve is installed in the sleeve, and the shrink sleeve is resisted in the sleeve by the elastic force of the inner spring radially outward, and the inner spring is completely accommodated in the inner spring. Inside the slot.
A shrink-fit connection assembly according to claim 1, further comprising an outer spring, wherein an outer spring receiving groove is radially provided on an outer peripheral surface of each of the contracting members, and two or more contracting members pass the outer spring. The shrink sleeves are combined to form the shrink sleeve, and the outer spring is completely accommodated in the outer spring receiving groove.
A shrink-fit connection assembly according to claim 1 wherein said limit mechanism is a threaded locking mechanism comprising a threaded portion axially disposed on the connecting mandrel body and disposed on said sleeve a threaded hole communicating with the shrink sleeve receiving space; the threaded hole of the sleeve cooperates with the threaded portion of the core rod to fix the sleeve on the connecting core rod, thereby locking the shrink sleeve in the fully contracted state of the shrink sleeve Inside the sleeve and on the connecting rod.
A shrink connection assembly according to claim 1, wherein the shrink sleeve accommodation space comprises the drive taper surface and the column hole connected to the large end of the drive taper surface, and the shrink sleeve housing space a resisting portion is radially protruded from the hole wall of the column hole; the shrink sleeve further includes a cylindrical surface connected to the large end of the shrinking tapered surface and engaging with the column hole of the shrink sleeve receiving space, An outer peripheral surface of the shrink sleeve is provided with a resisting groove that cooperates with a resisting portion on the sleeve.
A shrink-fit connection assembly according to claim 1, wherein said shrink sleeve housing space further comprises a post hole connected to said small end of said drive taper, said shrink sleeve further comprising a post hole a cylindrical surface, and a limiting portion for restraining the shrink sleeve on the sleeve radially outwardly at an end portion of the cylindrical protruding sleeve; wherein the shrink sleeve is expanded by the inner spring, the maximum of the limiting portion The outer diameter of the column hole is larger than the outer diameter of the shrink sleeve; the elastic force of the shrink sleeve through the inner spring outward direction, the limiting portion and the shrinking cone face the opposite axial limit of the shrink sleeve and The sleeve is mounted together; the limiting mechanism includes a threaded hole disposed on the sleeve to communicate with the shrink sleeve receiving space, and is disposed on a threaded portion of the outer circumference of the shrink sleeve, and the threaded hole of the sleeve is set in the contraction The threaded hole of the sleeve cooperates with the threaded portion of the shrink sleeve to fix the sleeve and the shrink sleeve together, so that the shrink sleeve is locked and fixed in the sleeve and connected in the fully contracted state of the shrink sleeve. On the core rod.
A shrink-fit connection assembly according to claim 1, further comprising a circular tube; said limiting mechanism being a thread locking mechanism comprising: said sleeve being disposed on said sleeve to communicate with said shrink sleeve housing space The threaded hole is disposed on the outer circumferential surface of the circular tube to cooperate with the threaded hole of the sleeve; the side wall of the circular tube is provided with a single-lobed shrinking member for accommodating the side hole.
A shrink-joining assembly according to claim 1, wherein a first contraction expansion projection for contracting and expanding the shrink sleeve is protruded from the outer circumference of the shrink sleeve, and the first contraction expansion projection includes The shrinking cone, Forming an expansion conical recess for expanding and contracting the sleeve on a side of the first contraction-contracting projection facing away from the converging conical surface, the converging taper of the shrink sleeve conforming to the taper direction of the expansion conical recess; The shrink sleeve accommodating space includes a first shrinkage expansion accommodating groove that cooperates with the first shrinkage expansion bulging portion, and the two groove walls of the first shrinkage expansion accommodating groove are formed to shrink the shrink sleeve and the shrink sleeve The shrinking taper surface is combined with the driving taper surface, and the expansion taper surface for expanding the shrink sleeve and engaging the expansion recessed portion of the shrink sleeve.
A shrink-fit connection assembly according to claim 12, wherein said sleeve includes a first sleeve and a second sleeve; and a first contraction with said first contraction expansion projection An expansion receiving groove is formed on the first sleeve; the limiting mechanism is a thread locking mechanism, and includes a threaded portion disposed on an outer circumference of the first sleeve, disposed on the second sleeve and a threaded hole in which the threaded portion of the first sleeve is fitted; and a second contraction-expanding projection that is symmetrical with respect to the center position of the first contraction-expanding projection on the outer circumference of the shrink sleeve, The shrink sleeve accommodation space further includes a second shrinkage expansion accommodating groove provided on the second sleeve and engaged with the second contraction expansion projection.
A shrink connection assembly according to claim 1 wherein said stop mechanism is a stop member mounted between the sleeve and the connecting mandrel.
A shrink connection assembly according to claim 14, wherein said limiting mechanism is a first circlip.
A shrink-fit connection assembly according to claim 1 wherein said locking mechanism is a threaded locking mechanism; and a second retaining spring that prevents reverse rotation of the threaded locking mechanism.
The shrink-fit connection assembly according to claim 1, wherein an axial rib or a recess is provided on an outer side of each of the contracting members, and said contracting tapered surface is disposed on a rib or a recess of the contracting member. Providing a recess on the sleeve that cooperates with a ridge on each of the damper members, or a rib that cooperates with a recess on each of the damper members, the drive cone being disposed on the sleeve ridge or depression Ministry.
The shrink connection assembly according to any one of claims 1 to 17, wherein the connecting core rod is a connecting member only for connecting, and the positioning resisting portion is disposed at one end of the connecting core rod. A connecting core head is formed on the outer circumference; the connected elements are two or more.
The shrink connection assembly according to any one of claims 1 to 17, wherein said connecting core rod is a stepped connecting shaft on a mechanical device; said connected members are more than one mounted on the connecting shaft The upper mechanical part; the positioning resisting portion is a step surface on the connecting core rod.
A shrink connection assembly according to claim 18, wherein said shrink sleeve abutting portion is provided on two outer circumferences of the connecting core body, and is provided at each of the shrink sleeve resisting portions. The shrink sleeve is fitted, the sleeve engaged with the shrink sleeve, and a limit mechanism for preventing the sleeve and the shrink sleeve from being loosened when the shrink sleeve is fully contracted.
A shrink-fit connection structure comprising the shrink-joined assembly according to any one of claims 1 to 17, further comprising two or more connected elements, each of which is provided with a connecting core rod Through hole

The connecting core rod is a connecting member only for connecting, and the positioning resisting portion is disposed on an outer circumference of one end of the connecting core rod to form a connecting core rod head;

The connecting core rod is provided with a through hole for resisting one end of the protruding portion through all the connected elements, and the connecting core rod is provided with a portion protruding from the protruding portion to protrude the connected member;

The shrink sleeve is mounted on the connecting core rod, the sleeve is mounted outside the shrink sleeve, the positioning resisting portion of the connecting core rod is axially resisted by a connected member opposite thereto, and the shrink sleeve is axially resisted by the other connected member opposite thereto Two or more connected components are abutted together, and the resisting projections of the connecting core rod are opposite to the corresponding resisting recesses of the shrink sleeve;

When the shrink sleeve is fully contracted, the resisting projection of the connecting core rod extends into the corresponding resisting recess of the shrink sleeve, and the surface and the surface resist each other to form a snap, and the limiting mechanism prevents the sleeve and the shrink sleeve from being loosened, so that the shrink sleeve is retained. In a fully contracted state;

In the fully contracted state of the shrink sleeve, the positioning resisting portion of the connecting core rod axially resists a connected member opposite thereto, the shrink sleeve is axially resisted by the other connected member opposite thereto, and the shrink joint assembly is connected more than two. The component connections are fixed together.
A shrink-fit connection structure according to claim 21, further comprising a wave spring or an elastic washer sleeved on the connecting core rod to eliminate the axial gap, and the wave spring or the elastic washer is mounted on the positioning resisting portion and connected Between the components, or between the shrink sleeve and the connected component.
A shrink-fit connection structure comprising the shrink-fit connection assembly according to any one of claims 1 to 17, further comprising one or more connected elements, said connected elements being mechanical parts;

The connecting core rod is a stepped connecting shaft on the mechanical device; the positioning resisting portion is a step surface connected to the core rod;

Providing a through hole for the mechanical part to cooperate with the connecting core rod;

The connecting core rod is provided with a hole for resisting one end of the protruding portion to pass through the mechanical part, and the mechanical part is connected with the positioning of the core rod to resist the shaft To resist, the connecting core rod is provided with a partially protruding mechanical part that resists the protruding portion;

The shrink sleeve is mounted on the connecting core rod, and the sleeve is installed outside the shrink sleeve. The shrink sleeve is resisted by the surface of the mechanical part facing away from the positioning resisting portion, and the positioning resisting portion, the shrink sleeve and the mechanical part are abutted together to resist the recessed portion. Aligning with the corresponding resisting projection;

When the shrink sleeve is fully contracted, the resisting projection of the connecting core rod extends into the corresponding resisting recess of the shrink sleeve, and the surface and the surface resist each other to form a snap, and the limiting mechanism prevents the sleeve and the shrink sleeve from being loosened, so that the shrink sleeve is retained. In a fully contracted state;

In the fully contracted state of the shrink sleeve, the positioning resisting portion of the connecting core rod axially resists the mechanical part and the opposite surface thereof, and the shrink sleeve pair and the mechanically opposite surface thereof axially resist, the shrink sleeve, the sleeve and the limiting mechanism will mechanically The parts are attached to the connecting rod.
a shrink-contracting connection structure, comprising: a shrink connection assembly, two or more connected elements, and a through hole that is matched with the connecting core rod on the connected element;

The shrink connection assembly comprises a connecting sleeve, a shrink sleeve composed of two or more flaps and a shrinking member for connecting the core rod, and is used for driving the shrink sleeve of the shrink sleeve, and the sleeve and the shrink sleeve are prevented from being loosened when the shrink sleeve is fully contracted. Limiting mechanism;

a positioning abutting portion is disposed on an outer circumference of one end end of the connecting core rod; a resisting concave portion or an annular abutting groove is disposed on an outer circumference of the other end end portion of the connecting core rod, and an axial length of the annular resisting groove or the resisting concave portion is greater than or Equal to the axial length of the shrinking member and its mating portion;

The shrinking member comprises a shrinking body, a shrinking taper surface disposed outside the shrinking body body for driving the shrink sleeve to shrink;

a connecting core rod accommodating space is disposed in the shrink sleeve; a shrink sleeve accommodating space is disposed in the sleeve, and a shrinking cone surface of each shrinking member is matched on the wall of the shrink sleeve accommodating space. Driving cone

An end of the connecting core rod away from the positioning resisting portion passes through all the through holes of the connected component, and the annular resisting groove or the resisting concave portion of the connecting core rod protrudes from the connected component;

The shrinking member is mounted on the annular resisting groove or the resisting recess of the connecting core rod, the sleeve is mounted outside the shrink sleeve, and the positioning resisting portion of the connecting core rod is axially resisted by a connected component opposite thereto, and the shrink sleeve is opposite to the opposite One of the connected elements is axially resisted, and the two or more connected elements are abutted together, and the shrink sleeve is opposite to the annular resisting groove of the connecting core rod;

When the shrink sleeve is fully contracted, the shrinking member protrudes into the annular resisting groove, and the shrinking member engages the annular resisting groove or the resisting recess to form a shrink sleeve. The end of the shrinking member facing away from the positioning resisting portion is annularly resisting the groove or the groove wall of the recessed portion. Resisting, one end of the shrinking member facing the positioning resisting portion is resisted by the opposite connected member; the limiting mechanism prevents the sleeve and the shrink sleeve from being loosened, and the shrink sleeve is maintained in a fully contracted state; the positioning resisting portion of the connecting core rod is opposite thereto One of the connected elements is axially resisted, the shrink sleeve is axially resisted by the other connected element opposite thereto, and the shrink connection assembly secures the two or more connected elements together.
A joining method of a shrink joint structure comprising the shrink joint assembly according to any one of claims 1 to 17, characterized in that:

The shrink connection structure further includes two or more connected elements; and the connected elements are provided with through holes that cooperate with the connecting core rod;

The connecting core rod is a connecting member only for connecting, and the positioning resisting portion is disposed on an outer circumference of one end of the connecting core rod to form a connecting core rod head;

Connection methods include:

The connecting core rod is provided with a through hole for blocking one end of the protruding portion through all the connected elements, and the connecting core rod is provided with a portion protruding from the protruding portion to protrude the connected member, and the positioning resisting portion and the connected member are abutted together ;

The shrink sleeve, the connecting core rod and the sleeve are mounted together, the shrink sleeve is mounted on the connecting core rod, the sleeve is mounted outside the shrink sleeve, the shrink sleeve protrudes from the sleeve toward the side of the connected component and abuts against the connected On the component, the wedge-shaped projection on the shrink sleeve is opposite to the corresponding resisting recess on the connecting core rod;

The sleeve drive shrink sleeve shrinks, and each flap shrinks radially, and the resisting projection of the shrinking member protrudes into the corresponding resisting recess of the connecting core rod, and the surface and the surface resist each other to form a snap, until the shrink sleeve is no longer radial. Movement, the shrink sleeve is in a fully contracted state, the sleeve stops moving or continues to slide relative to the shrink sleeve for a certain distance to stop the movement; the limit mechanism acts on the sleeve to prevent the sleeve and the shrink sleeve from loosening, so that the shrink sleeve remains in a fully contracted state ;

In the fully contracted state of the shrink sleeve, the resisting projection of the connecting core rod extends into the corresponding resisting recessed portion of the shrink sleeve. The surface and the surface resist each other to form a snap fit, and the shrink sleeve is mounted with the connecting core rod, and the shrink sleeve is opposite thereto. The connected component is axially resisted, and the positioning resisting portion of the connecting core rod axially resists the connected connecting member, and the shrinking connecting assembly is fixedly coupled with the connected component.
A joining method of a shrink joint structure comprising the shrink joint assembly according to any one of claims 1 to 17, characterized in that:

The shrink connection structure further includes more than one mechanical part;

The connecting core rod is a stepped connecting shaft on the mechanical device; the positioning resisting portion is a step surface connected to the core rod;

Providing a through hole for the mechanical part to cooperate with the connecting core rod;

Connection methods include:

The mechanical component is mounted on the connecting core rod from one end of the connecting core rod with the resisting protruding portion, and the connecting core rod is provided with a portion protruding from the protruding portion to protrude the connected component, and the positioning resisting portion and the connected component are abutted together ;

The shrink sleeve, the connecting core rod and the sleeve are mounted together, the shrink sleeve is mounted on the connecting core rod, the sleeve is mounted outside the shrink sleeve, the shrink sleeve protrudes from the sleeve toward the side of the connected component and abuts against the connected On the component, the wedge-shaped projection on the shrink sleeve is opposite to the corresponding resisting recess on the connecting core rod;

The sleeve drive shrink sleeve shrinks, and each of the shrink sleeves moves radially, and the resisting projections of the shrinking members extend into the corresponding resisting recesses of the connecting core rods, and the surface and the surface resist each other to form a snap until the shrink sleeves no longer move radially. The shrink sleeve is in a fully contracted state, the sleeve stops moving or continues to slide relative to the shrink sleeve for a certain distance to stop the movement; the limiting mechanism acts on the sleeve to prevent the sleeve and the shrink sleeve from loosening, so that the shrink sleeve remains in a fully contracted state;

In the fully contracted state of the shrink sleeve, the resisting projection of the connecting core rod extends into the corresponding resisting recessed portion of the shrink sleeve. The surface and the surface resist each other to form a snap fit, and the shrink sleeve is mounted with the connecting core rod, and the shrink sleeve is opposite thereto. The connected component is axially resisted, and the positioning resisting portion of the connecting core rod axially resists the connected connecting member, and the shrinking connecting assembly is fixedly coupled with the connected component.
A joining method of a shrink joint structure using the shrink joint assembly according to any one of claims 1 to 7, 17 to 15, wherein:

The shrink connection structure further includes more than one connected component, and the connected component is provided with a through hole that cooperates with the connecting core rod;

The limiting mechanism is a thread locking mechanism, comprising a threaded portion axially disposed on the connecting core rod body, and a threaded hole disposed on the sleeve and communicating with the shrink sleeve receiving space;

Connection methods include:

The connecting core rod is provided with one end of the connecting rod passing through the connected component, and the connecting core rod is provided with a portion protruding from the protruding portion to protrude the connected component, and the positioning resisting portion and the connected component are abutted together;

The shrink sleeve, the connecting core rod and the sleeve are mounted together, the shrink sleeve is mounted on the connecting core rod, the sleeve is mounted outside the shrink sleeve, and the shrink sleeve protrudes from the side of the connected component;

Rotating the sleeve through the threaded hole in the sleeve to threadably engage the threaded portion on the connecting mandrel body, the sleeve moves toward the connected component, and when the shrink sleeve contacts the connected component, the wedge-shaped projection on the shrink sleeve Corresponding to the corresponding resisting recess on the connecting core rod;

Then, the sleeve is driven to rotate, and the driving taper surface of the sleeve slides with respect to the contraction of the shrink sleeve. The shrink sleeve is contracted by the connecting member against the axial direction only in the radial direction, and the resisting projection on the connecting rod is connected. The resisting recess extending into the shrink sleeve forms a snap by the surface and the surface resisting each other until the shrink sleeve is no longer moved radially, the shrink sleeve is in a fully retracted state, the sleeve stops rotating or continues to rotate to continue the sleeve relative to the shrink sleeve Sliding a distance to stop the movement;

The threaded hole on the sleeve and the threaded portion on the connecting mandrel body are threaded to prevent the sleeve and the shrink sleeve from being loosened, so that the shrink sleeve is maintained in a fully contracted state;

In the fully contracted state of the shrink sleeve, the resisting projection of the connecting core rod extends into the corresponding resisting recessed portion of the shrink sleeve. The surface and the surface resist each other to form a snap fit, and the shrink sleeve is mounted with the connecting core rod, and the shrink sleeve is opposite thereto. The connected component is axially resisted, and the positioning resisting portion of the connecting core rod axially resists the connected connecting member, and the shrinking connecting assembly is fixedly coupled with the connected component.
A joining method of a shrink joint structure using the shrink joint assembly according to any one of claims 1 to 7, 17 to 15, wherein:

The shrink connection structure further includes more than one connected component, and the connected component is provided with a through hole that cooperates with the connecting core rod;

The shrink connection assembly further includes a circular tube; the limiting mechanism is a thread locking mechanism, and includes a threaded hole disposed on the sleeve and communicating with the shrink sleeve receiving space, and is disposed on the outer circumferential surface of the circular tube and the sleeve a threaded portion of the threaded hole; a single-lobed shrinking member is disposed on the side wall of the circular tube to receive the side hole;

Connection methods include:

The connecting core rod is provided with one end of the connecting rod passing through the connected component, and the connecting core rod is provided with a portion protruding from the protruding portion to protrude the connected component, and the positioning resisting portion and the connected component are abutted together;

The shrink sleeve, the sleeve, the round tube and the connecting core rod are installed together; the single-lobed shrinking member is installed in the corresponding single-lobed shrinking member receiving side hole of the round tube, and the round tube and the shrink sleeve installed together are installed Connecting the core rod, the sleeve is mounted outside the circular tube and the shrink sleeve, the shrink sleeve protrudes from the sleeve toward the side of the connected component and abuts against the connected component, and the wedge-shaped projection and the connecting core rod on the shrink sleeve Correspondingly resisting depressions are opposite;

Rotating the sleeve through the threaded hole in the sleeve and screwing with the thread on the circular tube, the sleeve moves toward the connected component, and the driving taper surface of the sleeve slides with respect to the contraction of the shrink sleeve, and the shrink sleeve is The movement of the connecting element against the axial direction only shrinks in the radial direction, and the resisting projections on the connecting core rod extend into the recessed recesses of the shrink sleeve to form a snap by the surface and the surface, until the shrink sleeve is no longer radially moved. The shrink sleeve is in a fully contracted state, the sleeve stops rotating or continues to rotate, so that the sleeve continues to slide relative to the shrink sleeve for a certain distance to stop moving;

Thread-locking through the threaded hole in the sleeve and the threaded portion on the circular tube prevents the sleeve and the shrink sleeve from being loosened, so that the shrink sleeve is maintained in a fully contracted state;

In the fully contracted state of the shrink sleeve, the resisting projection of the connecting core rod extends into the corresponding resisting recessed portion of the shrink sleeve. The surface and the surface resist each other to form a snap fit, and the shrink sleeve is mounted with the connecting core rod, and the shrink sleeve is opposite thereto. The connected component is axially resisted, and the positioning resisting portion of the connecting core rod axially resists the connected connecting member, and the shrinking connecting assembly is fixedly coupled with the connected component.
A joining method of a shrink joint structure using the shrink joint assembly according to any one of claims 1 to 7, 17 to 15, wherein:

The shrink connection structure further includes more than one connected component, and the connected component is provided with a through hole that cooperates with the connecting core rod;

The limiting mechanism is a limiting member installed between the sleeve and the connecting core rod;

Connection methods include:

The connecting core rod is provided with one end of the connecting rod passing through the connected component, and the connecting core rod is provided with a portion protruding from the protruding portion to protrude the connected component, and the positioning resisting portion and the connected component are abutted together;

The shrink sleeve, the connecting core rod and the sleeve are mounted together, the shrink sleeve is mounted on the connecting core rod, the sleeve is mounted outside the shrink sleeve, the shrink sleeve protrudes from the sleeve toward the side of the connected component and abuts against the connected On the component, the wedge-shaped projection on the shrink sleeve is opposite to the corresponding resisting recess on the connecting core rod;

Applying an axial force to the sleeve in the direction of the connected component, the sleeve moves in the direction of the connected component, and the shrink sleeve is contracted in the radial direction by the movement of the connected component against the axial direction, and the resisting projection on the connecting rod is connected. The resisting recess extending into the shrink sleeve forms a snap by the surface and the surface resisting until the shrink sleeve no longer moves in a radial direction, the shrink sleeve is in a fully contracted state, the sleeve stops moving or continues to slide relative to the shrink sleeve for a certain distance to stop moving. ;

Reinstalling the upper limit mechanism, the limiting mechanism acts on the sleeve to prevent the sleeve and the shrink sleeve from being loosened, so that the shrink sleeve is maintained in a fully contracted state;

In the fully contracted state of the shrink sleeve, the resisting projection of the connecting core rod extends into the corresponding resisting recessed portion of the shrink sleeve. The surface and the surface resist each other to form a snap fit, and the shrink sleeve is mounted with the connecting core rod, and the shrink sleeve is opposite thereto. The connected component is axially resisted, and the positioning resisting portion of the connecting core rod axially resists the connected connecting member, and the shrinking connecting assembly is fixedly coupled with the connected component.
A joining method of a shrink joint structure using the shrink joint assembly according to any one of claims 1 to 5, 8 to 20, characterized in that:

The shrink connection structure further includes more than one connected component, and the connected component is provided with a through hole that cooperates with the connecting core rod;

The shrink connection assembly further includes an inner spring and an outer spring; the inner spring receiving groove is radially disposed on the hole wall of the connecting core receiving space of the shrink sleeve and the connecting core rod, and the outer peripheral surface of each of the shrinking members An outer spring receiving groove is arranged in the upper radial direction;

Connection methods include:

The shrinking member is held together by the outer spring to form the shrink sleeve, and the outer spring is completely accommodated in the outer spring receiving groove;

The inner spring is installed in the shrink sleeve, the inner spring is completely accommodated in the inner spring receiving groove, and the shrink sleeve with the inner spring and the outer spring is installed in the sleeve, and the elastic force radially outward by the inner spring will shrink The sleeve is resisted in the sleeve; or the shrink sleeve with the outer spring is installed in the sleeve, and the inner spring is installed in the shrink sleeve, the inner spring is completely accommodated in the inner spring receiving groove, and the inner spring diameter is passed The outward elastic force resists the shrink sleeve in the sleeve;

The connecting core rod is provided with one end of the connecting protruding portion passing through the connected component, and the connecting core rod is provided with a portion protruding from the protruding portion to protrude the connected component;

Mounting the sleeve and shrink sleeve mounted together on the connecting core rod; the shrink sleeve protrudes from the sleeve toward the side of the connected component and abuts against the connected component, and the wedge-shaped projection and the connecting core on the shrink sleeve Corresponding resisting recesses on the rod are facing each other;

The sleeve drive shrink sleeve shrinks, and the resisting projection on the connecting core rod extends into the shrink sleeve of the shrink sleeve to form a snap by the surface and the surface resisting until the shrink sleeve no longer moves in a radial direction, and the shrink sleeve is in a fully contracted state. The sleeve stops moving or continues to slide relative to the shrink sleeve for a certain distance to stop the movement; the limiting mechanism acts on the sleeve to prevent the sleeve and the shrink sleeve from loosening, so that the shrink sleeve is maintained in a fully contracted state;

In the fully contracted state of the shrink sleeve, the positioning resisting portion of the connecting core rod axially resists the connected member opposite thereto, the shrink sleeve is axially resisted by the opposite connected member, and the shrink joint assembly is fixedly coupled with the connected member.
A joining method of a shrink joint structure using the shrink joint assembly according to any one of claims 1 to 5, 8 to 20, characterized in that:

The shrink connection structure further includes more than one connected component, and the connected component is provided with a through hole that cooperates with the connecting core rod;

The shrink connection assembly further includes an outer spring; an outer spring receiving groove is radially disposed on an outer circumferential surface of each of the contracting members;

Connection methods include:

The shrinking member is held together by the outer spring to form the shrink sleeve, and the outer spring is completely accommodated in the outer spring receiving groove;

The connecting core rod is provided with one end of the connecting protruding portion passing through the connected component, and the connecting core rod is provided with a portion protruding from the protruding portion to protrude the connected component;

The shrink sleeve is mounted on the connecting core rod, and the sleeve is mounted outside the shrink sleeve; the shrink sleeve protrudes from the side of the connected member and abuts against the connected member, and the wedge sleeve on the shrink sleeve protrudes The portion is opposite to the corresponding resisting recess on the connecting core rod;

The sleeve drive shrink sleeve shrinks, and the resisting projection on the connecting core rod extends into the shrink sleeve of the shrink sleeve to form a snap by the surface and the surface resisting until the shrink sleeve no longer moves in a radial direction, and the shrink sleeve is in a fully contracted state. The sleeve stops moving or continues to slide relative to the shrink sleeve for a certain distance to stop the movement; the limiting mechanism acts on the sleeve to prevent the sleeve and the shrink sleeve from loosening, so that the shrink sleeve is maintained in a fully contracted state;

In the fully contracted state of the shrink sleeve, the resisting projection of the connecting core rod extends into the corresponding resisting recessed portion of the shrink sleeve. The surface and the surface resist each other to form a snap fit, and the shrink sleeve is mounted with the connecting core rod, and the shrink sleeve is opposite thereto. The connected component is axially resisted, and the positioning resisting portion of the connecting core rod axially resists the connected connecting member, and the shrinking connecting assembly is fixedly coupled with the connected component.