45results about How to "Avoid connection failure" patented technology

This invention provides a highly stable plug-in structure, including a connector, a connector sleeved on the connector, a wire on the connector, and a plug-in component on the connector and connected to the wire. The plug-in component includes an arc-shaped conductive element with at least one opening along its axial direction. The conductive element and the at least one opening create one or more independent elastic contact points. When the connector is mated to the connector, the conductive element is deformed by the pressure of the internal electrical contacts of the connector, ensuring stable and sufficient radial contact pressure with each insertion. After removal, the conductive element springs back to its original curvature, effectively preventing connection failure caused by permanent enlargement of the connector's inner diameter.

The wire harness comprises a main plug, a plurality of connecting holes and a plurality of conductive sleeves are arranged on the plug, each conductive sleeve comprises a vertical connecting part and a plurality of elastic sheets, the elastic sheets are annularly arranged outside the vertical connecting part at intervals and connected with the vertical connecting part, and the sides, close to orifices of the connecting holes, of the elastic sheets incline outwards. The conductive sleeve is inserted into the connecting hole, and the elastic sheet deforms under the action of the outer wall of the connecting hole and abuts against the outer wall of the wire harness core. When the conductive sleeve and the wire harness are synchronously inserted into the connecting hole, the elastic sheets deform towards the inner side of the connecting hole under the action of the hole wall of the connecting hole and are pressed on the wire harness core, so that the wire harness is locked by using the plurality of elastic sheets, the mechanical locking capability of the conductive sleeve on the wire harness is optimized, and the connection reliability is improved; and the plurality of elastic sheets enclose to form the side wall matched with the hole wall of the connecting hole under the action of the connecting hole, so that the contact area between the elastic sheets and the wire core is increased, and the electrical performance is improved.

The invention discloses a high-luminous-efficiency LED lighting device and a manufacturing method thereof, and relates to the technical field of lighting, the high-luminous-efficiency LED lighting device comprises a shell, a heat dissipation module used for avoiding light attenuation acceleration is arranged in the shell, the heat dissipation module comprises a ceramic heat dissipation plate and an aluminum substrate which are arranged in the shell, and concave-convex textures are arranged on the heat dissipation surface of the ceramic heat dissipation plate; the aluminum substrate is provided with a multi-channel assembly used for preventing the overall lighting effect from being reduced, and the opening of the shell is provided with an anti-glare assembly used for restraining glare under low light loss. Convection heat transfer is enhanced through concave-convex textures on the surface of the ceramic heat dissipation plate so as to delay light attenuation, the multi-channel assembly independently adjusts driving current through a power management system so as to achieve spectrum refined reconstruction, and the anti-dazzle assembly achieves dazzle suppression under low light loss through microstructure textures on the light-emitting face of a lens and light diffusion particles filled in the center area.

The utility model discloses a kind of connectors for inverter, including connector shell and the electric conductor being set in the connector shell, the one end of electric conductor is connected with the internal electrical element of plate end assembly, the other end of electric conductor is connected with external photovoltaic module;The connector shell includes connector main body and nut, connector main body is provided with boss, boss is located plate end assembly inside and is abutted with plate end assembly, so that the outside end of connector main body protrudes the through-hole of plate end assembly, the outside end of connector main body is provided with screw thread, when nut and the outside end of connector main body are cooperated screw thread connection, connector main body is fixedly connected with plate end assembly;It further includes the anti-back pad for preventing nut back rotation between plate end assembly and nut, in the structure, by the setting of anti-back pad, effectively prevent nut loosening and falling off in use process, to enhance the stability of connector for inverter, avoid the connection failure problem caused by nut loosening.

The invention relates to the technical field of power motors, in particular to a base and end cover sealing structure and a motor, and the base and end cover sealing structure comprises a base, a shell, an outer end cover, an inner end cover and a sealing element; the inner end cover is detachably arranged at the first end of the base, the second end, opposite to the inner end cover, of the base is rotationally connected with a rotary connecting assembly, and the rotary connecting assembly is connected with the shell. One end of the outer end cover is connected with the shell, the other end of the outer end cover is opposite to the inner end cover, and the sealing piece is arranged between the inner end cover and the outer end cover and seals the opposite space between the inner end cover and the outer end cover; a connecting buckle is arranged at the end, facing the rotary connecting assembly, of the inner end cover, and an assembling clamping groove matched with the connecting buckle is formed in the base. The problems that traditional threaded connection is low in efficiency and prone to failure are solved, and efficient assembly and reliable sealing are achieved while the stability of the overall structure after connection with external accessories is guaranteed.

The invention relates to the technical field of civil engineering, in particular to a steel sheet pile supporting device. The steel sheet pile supporting device comprises a pile plate body, an enclosing purlin assembly and a steel pipe support, and the pile plate body is fixedly connected with the enclosing purlin assembly through a hanging piece; the enclosing purlin assembly comprises a front plate, a rear plate and I-shaped steel, the front plate and the rear plate are connected through at least two sets of first bolts, and the length of the first bolts is larger than the distance between the front plate and the rear plate. The I-shaped steel is inserted between the front plate and the rear plate, and the number of the I-shaped steel is 2-3; the steel pipe support is a steel pipe, the steel pipe support is connected with the front plate, at least two sets of first stiffening ribs are arranged at the end of the side, close to the front plate, of the steel pipe support, and the steel pipe support is in threaded connection with the supporting piece through the first bolt holes. According to the supporting device, the assembling procedure is greatly simplified, the connection between the steel pipe support and the enclosing purlin assembly is firmer and more reliable, the load effect under the full working conditions of supporting tension, pressing and the like can be effectively resisted, and the overall stability and the bearing capacity of the supporting device are further improved.

The present application relates to the technical field of welding control, in particular to a large plate welding equipment control system, comprising a space normalization module, an address generation module, a path screening module, a structure verification module and an interconnection output module.In the present application, in the multi-machine collaborative working environment under strong electromagnetic interference of arc welding, the three-dimensional coordinates of the welding torch contact point are collected with high precision and space normalization processing is performed, which fundamentally eliminates the process data differences caused by different welding postures, a unified sequence number is constructed in combination with the starting timing of the core equipment of the welding power source and the wire feeder, a unique control address is generated by fusing the sequence identifier, the accurate mapping of the physical location of the equipment and the network address is realized, the logical connection sequence is intelligently constructed according to the proximity of the coordinate space, the node and path binding is completed synchronously, the rationality of the connection path and the stability of the communication structure are significantly improved, and the logical order, spatial clarity and control uniformity of the arc welding equipment group collaborative work are ensured.

This utility model relates to the technical field of thermal insulation structures, and discloses a rooftop thermal insulation reinforcement structure, including a thermal insulation layer laid on the rooftop. The thermal insulation layer has an extruded polystyrene (XPS) board inside, and a wire mesh layer is laid on the XPS board. The XPS board and the wire mesh layer are wrapped inside the thermal insulation layer. The wire mesh layer has multiple mesh openings, and there are intersections between adjacent mesh openings. An insert strip is provided at the intersection, and the insert strip passes through the XPS board. By setting the XPS board and the wire mesh layer inside the thermal insulation layer, and setting the insert strip at the intersection of the wire mesh layer, the connection strength of the internal materials of the thermal insulation layer is improved.

This application relates to a male connector and connector assembly. The male connector includes a housing and a male connector member. The housing includes a connection channel and an injection hole. The connection channel extends through the housing, and the injection hole is formed on the housing and communicates with the connection channel. The male connector member is disposed within the connection channel and has a recessed portion. The injection hole and the recessed portion communicate with each other. By filling the connection channel inside the housing with adhesive through the injection hole, the housing and the male connector member are secured, thus solving the problem of connection failure caused by connector slippage in automotive connectors.

The utility model relates to the technical field of furniture metal connection, in particular to an adjustable furniture metal connecting foot which comprises a cross plate, bottom plates are symmetrically arranged at the upper end of the cross plate in a sliding mode, buffer springs are fixedly connected to the middles of the upper ends of the bottom plates, and buffer bases are fixedly connected to the upper ends of the buffer springs. An adjusting structure is fixedly installed at the upper end of the buffering base, a supporting plate is fixedly connected to the upper end of the adjusting structure, the opposite corners of the supporting plate are of an arc-shaped structure, and a fence is fixedly installed on the edge, away from the arc-shaped corners, of the supporting plate. The adjustable furniture can adapt to adjustment of various road surfaces, the use comfort can be improved, the stability of the furniture in the adjustment process is guaranteed, balance combination of the stable structure, convenient operation and multiple functions is achieved, and the requirements for high-precision adjustment and high-adaptability connection in the furniture industry are met.

The utility model relates to the technical field of machine manufacturing, and discloses a ladder manufacturing positioning tool which comprises a supporting frame body and a plurality of connecting pieces, at least one pair of first positioning plates distributed at intervals in the first direction is arranged at the top of the supporting frame body, a first positioning hole is formed in each first positioning plate, and a second positioning hole is formed in each first positioning plate. A plurality of pairs of second positioning plates distributed at intervals in the first direction are arranged on one side of the supporting frame body in the height direction at intervals, each second positioning plate is provided with a second positioning hole, and the first direction is perpendicular to the height direction of the supporting frame body. Every two connecting plates located on different main frames can correspond to at least one pair of first positioning plates or at least one pair of second positioning plates, and the first positioning holes and the second positioning holes are used for assisting in positioning the positions of through holes to be formed in the corresponding connecting plates. Each connecting piece is detachably connected with a through hole formed in the connecting plate and the first positioning hole or the second positioning hole corresponding to the through hole. And the ladder stand manufacturing yield is high, and the universality is good.

This utility model relates to a drill string processing system for oil drilling rigs, including a two-tier manipulator, a drill platform manipulator, a powered slip device, a steel drill bit, a thread cleaning device, and a traveling crane system. The two-tier manipulator is installed on the second tier of the derrick, and the traveling crane system is vertically and movably installed on the derrick. The drill platform manipulator and the steel drill bit are installed on the drill platform, allowing them to operate close to the wellhead. The powered slip device is installed at the wellhead. The thread cleaning device includes a male thread cleaning assembly and a female thread cleaning assembly. Both are installed on the drill platform; the male thread cleaning assembly cleans the male threads of the drill string located at the wellhead, and the female thread cleaning assembly cleans the female threads of the drill string located at the wellhead. Its advantages include a high degree of mechanization, significantly improved operational efficiency and safety.

This utility model belongs to the field of offshore wind power and discloses a quick unhooking device for towing floating wind turbines. It includes a housing, a piston, and an oil tank. The housing and piston are respectively used to connect to corresponding cables. The housing has an inner cavity with an opening on one side. The piston slides and inserts into the inner cavity. Multiple first separation plates are spaced apart on the inner wall of the inner cavity opposite the piston. Multiple second separation plates are spaced apart on the outer wall of the piston facing the inner cavity. The first and second separation plates are staggered, forming a serpentine channel. The serpentine channel is connected to the oil tank via a liquid inlet pipe. A seawater interface is provided on one side of the liquid inlet pipe, and a water inlet valve is installed on the seawater interface. The dual buffering principle of this utility model not only effectively copes with high-frequency, low-amplitude vibrations but also stores energy through the oil compression effect when facing strong impacts, significantly reducing the impact peak value, minimizing damage to connecting parts, and improving system stability.

This utility model belongs to the technical field of injection molding, and particularly relates to a protective ring mold and molding device, including an upper mold assembly, a lower mold assembly, and a mold core. When the upper mold assembly and the lower mold assembly are closed, the upper mold plate and the positioning assembly form an injection cavity, and the outer shell of the protective ring is formed by injection molding through the injection port on the periphery of the fiber rod. This utility model solves the problems of low efficiency and poor product consistency in manual operation. The replaceable design of the mold core adapts to the processing requirements of fiber rods of different specifications. The injection molding process makes the outer shell and the fiber rod form an integral structure, avoiding connection failure caused by insufficient glue curing. The cooperation between the positioning assembly and the upper and lower molds ensures the dimensional accuracy of the outer shell and eliminates the positioning misalignment defects common in manual operation.

The application relates to the technical field of wireless screen projection, in particular to an Airplay directional screen projection method and device, which are applied to a proxy server configured with double network cards, the proxy server is arranged between a guest network and a screen projection device network and respectively accesses the two networks; after an mDNS query packet of a user mobile phone terminal is acquired through a guest network card, a simplified mDNS response packet is replied to induce the mobile phone terminal to send a unicast query packet; the unicast query packet is forwarded to a screen projection device network multicast address, only a multicast response packet of a screen projection service bound with the mobile phone terminal is received; a service address in the response packet is modified into a guest network card IP and is fed back to the mobile phone terminal, and a NAT network channel is simultaneously established. The application solves the screen projection service discovery difficulty and the screen projection service discovery difficulty caused by VLAN isolation in a hotel and the like scene, does not need to change an existing network topology, realizes directional screen projection, the screen projection service can be flexibly arranged, adapts to different scene requirements, and has high connection stability.

The utility model discloses a self -locking card formula nut mechanism, including nut body, joint piece and stop device, joint piece is by side wall and located the baffle and fender of both ends constitute, and the cavity is formed among three, and nut body is along the axial sliding of screw hole in the accommodation cavity, and baffle sets up the perforation corresponding with screw hole, and the accommodation cavity has the starting end and the terminal end, and nut body is in the starting end with baffle abuts, in the terminal end with fender abuts, limit device is located in the side wall of accommodation cavity. In this mechanism, the joint piece can act as a wrench, limiting the nut body rotation, without the traditional tool screw, overcome the obstruction of limited space to installation, improve the installation efficiency in the limited space, avoid affecting production progress and equipment assembly. When the bolt is screwed into the nut body, the nut body moves from the starting end to the terminal end under stress until it contacts with the limiting device. Because the joint piece cannot be deformed due to environmental influence, it can lock and fix the nut body, effectively preventing it from loosening in vibration, impact and other environments.

The utility model discloses a knob, which is applied to a kitchen range and comprises a knob shell, a knob cover, a plurality of fixed ribs and a plurality of fixed ribs, the knob shell comprises a knob ring and an opening for sealing one end of the knob ring, and the inner wall of the knob ring is provided with a plurality of fixed ribs which are parallel to the central axis of the knob shell and are arranged at intervals along the circumferential direction; and the knob inner core is located in the knob shell, and a plurality of fixing grooves which correspond to the fixing ribs and are clamped and matched with the fixing ribs are formed in the peripheral surface of the knob inner core. The utility model further discloses a kitchen range with the knob. The beneficial effects of the utility model lie in that the fixation of the knob housing and the knob inner core is firm and stable.

This utility model relates to the field of FC socket technology and discloses a combined FC socket module, including an FC plug, an FC socket, and an FC jumper. A mounting block is fixedly disposed on one side of the FC socket, and a mounting groove is formed on one side of the FC plug. The mounting block and the mounting groove cooperate to connect the FC plug and the FC socket. The FC jumper is fixedly connected inside the FC plug. A pin is fixedly connected inside the FC socket and connects to one end of the FC jumper. A connecting component is provided between the FC plug and the FC socket. The connecting component includes a magnetic post and an adsorption groove. The magnetic post is fixedly disposed inside the mounting groove, and the adsorption groove is formed on the outer wall of the mounting block. The magnetic post slides against the adsorption groove, and the magnetic post adsorbs the adsorption groove, stably connecting the mounting block inside the mounting groove. This solves the problem of the laborious disassembly and assembly of existing equipment.

The application discloses a kind of based on substructure pre-stabilization ultra-high multilayer printed circuit board manufacturing method, suitable for the number of layers N greater than 20 ultra-high multilayer board manufacturing.The method divides the whole manufacturing process into three stages, and sequentially forms inner core, intermediate and final substructure.The core is: after each manufacturing stage is completed, the complete encapsulation process of metalization, resin filling, grinding and copper cap plating of interconnection hole is carried out, so that the mechanical and electrical stability of the current substructure is realized before entering the next stage of pressing.Meanwhile, for each substructure, its pressing process parameters are independently set to match its material and structural characteristics.The application effectively solves the core problems of poor interlayer alignment accuracy, poor high aspect ratio hole plating uniformity and low overall yield caused by thermal-mechanical stress accumulation in traditional manufacturing of ultra-high multilayer board, significantly improves the reliability and manufacturing efficiency of the product.

The invention discloses a connecting structure of an air inlet pipe in furnace tube type equipment and a fixing method of the connecting structure, and belongs to the technical field of pipe joint and pipe supporting, the connecting structure comprises a reaction cavity, an exhaust manifold arranged at the bottom of the reaction cavity and an air inlet pipe arranged in the reaction cavity, and further comprises an air inlet pipe fixing structure; the air inlet pipe fixing structure comprises an air outlet short pipe, a positioning ring and a clamping ring. A stepped cylindrical surface is arranged at the upper part of the air outlet short pipe; the positioning ring comprises a ring piece and a positioning column arranged on the ring piece; the clamping ring is of an annular structure with the span larger than 180 degrees. By means of the multi-point insertion matching design of the positioning columns and the positioning holes, accurate centering and powerful radial constraint of the air inlet pipe in the air outlet short pipe are achieved, and the possibility that the air inlet pipe shakes in the radial direction in the operation process is fundamentally eliminated. Due to the matching design of the arc-shaped clamping grooves and the protrusions, double mechanical locking in the axial direction and the circumferential direction is provided, the reliability is far better than that of traditional welding, and connection failure caused by thermal stress is completely eradicated.

The invention discloses a processing method of an aluminum oxide electrostatic chuck, and aims to overcome the defect that the connection failure is easy to occur when the electrostatic chuck is used for a long time. The method comprises the following steps: S1, selecting two substrates, and processing a high-voltage electrode groove on one substrate; s2, coating bonding slurry on the surface of a substrate close to the edge, and drying; s3, the two substrates are attached together and assembled into a furnace, diffusion welding is achieved after the slurry is heated, the two substrates are connected into a disc body, and an electrode cavity is formed in the high-voltage electrode groove; s4, conducting resin is poured into the electrode cavity in a vacuum mode. According to the processing of the electrostatic chuck, high-strength integration of the aluminum oxide ceramic and the internal conductive adhesive functional layer is realized, the problem of connection failure of the electrostatic chuck caused by decomposition or aging of an adhesive at a high temperature is avoided, the overall performance of the electrostatic chuck is improved, and the service life of the electrostatic chuck is prolonged.

The invention belongs to the technical field of cable connectors, and particularly relates to a center alignment integrated cable connector for a vacuum corrugated pipe and a connection method, and the center alignment integrated cable connector comprises a first connector, a second connector and a third connector; the third connector coaxially connects and wraps the first connector and the second connector which are horizontally mounted, and the central axes of the first connector, the second connector and the third connector are aligned; according to the connector, the first connector body, the second connector body and the third connector body are tightly combined in a threaded rotation mode, connection faults are effectively prevented, circuit safety is ensured, the first electric conductor and the second electric conductor are reliably connected, poor contact is completely eradicated, and the connector is simple in structure and convenient to use. Interference of external deformation factors can be blocked, stability of current transmission can be guaranteed, exchange of internal and external airflow is blocked, rotation of the third connector can be prevented, looseness between the connectors is avoided, and contact hidden dangers of the connectors are eliminated fundamentally.

This utility model relates to the field of martial arts props technology and discloses a martial arts performance prop, including two sticks, a connecting ring, and a metal chain. Each stick has a threaded hole at one end, and a connecting post is threadedly connected to the inner cavity of the threaded hole. Two rotating plates are symmetrically arranged radially in the inner cavity of the connecting post. The rotating plates are rotatably connected to the connecting post via pins. A locking block is fixedly connected to one side of each rotating plate. An annular groove matching the locking block is formed on the inner wall of the threaded hole. A return spring is provided between each rotating plate and the connecting post. One end of the return spring abuts against the rotating plate, and the other end is fixed to the inner wall of the connecting post. Two clearance grooves are formed at one end of the connecting post. The free end of the rotating plate extends into the clearance groove and slides in cooperation with the clearance groove. A rectangular groove is formed on the top of each rotating plate.

The application relates to a wireless communication method, a control system and a medium for a WiFi station, the wireless communication method comprising the following steps of: receiving, by the WiFi station, a configuration command about supported communication connection rates from an AP; obtaining, based on the configuration command, a first rate set of a first communication connection rate supported by the AP; obtaining a second rate set of a second communication connection rate supported by the WiFi station; and establishing a wireless communication connection between the WiFi station and the AP based on a minimum rate of the second rate set in a case where a minimum rate in a third rate set, which is an intersection of the first rate set and the second rate set, is equal to the minimum rate in the second rate set. The wireless communication method can obtain a communication connection rate commonly supported by the WiFi station and the AP, improve the success probability of the wireless communication connection between the WiFi station and the AP, and avoid the problem of connection failure caused by rate mismatching between the WiFi station and the AP.

This utility model belongs to the field of axle housing technology and discloses a heavy-duty truck axle housing, including an axle housing body, a flange connected to the axle housing body, a mounting base, an upper leaf spring seat, and a lower leaf spring seat connected to the axle housing body. The upper leaf spring seat and the lower leaf spring seat are respectively provided with upper mounting holes and lower mounting holes, and are respectively provided with upper leaf spring filling and reinforcing surfaces and lower leaf spring filling and reinforcing surfaces. The upper leaf spring seat is connected to a large arc transition rib, which is connected to the axle housing body. The upper leaf spring seat is also connected to a flange side transition rib, which is connected to the axle housing body. The lower leaf spring seat is connected to a connecting rib, which is connected to the axle housing body. This utility model enhances the overall structural strength of the axle housing, enabling the axle housing to stably bear loads under complex working conditions such as heavy loads and bumps, avoiding the problem of fatigue cracks or even fracture failure at the contact point between the axle housing and the leaf spring seat, and improving the load-bearing capacity and service life of the axle housing.

The utility model discloses a copper-nickel composite busbar of a high-power lithium battery pack of a cross-country motorcycle, which comprises a copper-nickel composite busbar body, a connecting component is arranged on the copper-nickel composite busbar body, and a protective component is arranged on one side of the copper-nickel composite busbar body. According to the copper-nickel composite busbar, the connection stability is ensured, the connection looseness is effectively prevented, the connection reliability can be kept even in the severe environment of vibration or impact, meanwhile, the protection assembly arranged on the copper-nickel composite busbar body can effectively absorb vibration and impact, buffer protection is provided for the busbar, and the service life of the busbar is prolonged. Connection looseness or structural damage caused by external impact is prevented, the stability of the busbar in a severe environment is ensured, and damage of excessive vibration to the busbar is avoided.

The utility model discloses a communication device, which comprises a circuit board, a shielding shell assembly, a connector assembly, a first cold plate and at least one second cold plate, and is characterized in that the shielding shell assembly comprises a protective shell, a basic shielding shell and at least one laminated shielding shell; the protective shell and the basic shielding shell are connected and fixed on the circuit board; the at least one laminated shielding shell is arranged on one side, deviating from the circuit board, of the basic shielding shell; the basic shielding shell and the laminated shielding shell are used for inserting at least one optical module; the first cold plate is arranged between the basic shielding shell and the laminated shielding shell; at least one second cold plate, wherein each second cold plate is arranged on one side, deviating from the first cold plate, of the laminated shielding shell; the connector assembly is fixed to the circuit board and located in the protective shell. And the optical module is used for being connected with the optical module inserted into the basic shielding shell and is also used for being connected with the optical module inserted into the at least one laminated shielding shell. The stability of the whole shielding shell assembly is guaranteed while liquid cooling heat dissipation is achieved.

The utility model relates to injection moulding barrel technical field, and specifically is a kind of high-temperature-resistant composite barrel, including bucket body and bucket cover, the bucket body includes by the inner bucket made of high-temperature-resistant material and by the outer bucket made of glass fiber reinforced composite material, the inner bucket and outer bucket are bonded fixed, the barrel is formed in the inner bucket Multiple annular reinforcing ribs, the bucket body is formed with insertion edge at bucket mouth, the outer wall of the bucket body is formed with mating groove near the insertion edge, the bucket cover is used to install on the one end of the bucket body at bucket mouth Formed with the sealing groove inserted by the insertion edge, the sealing ring extruded by the insertion edge is arranged in the sealing groove, the outer edge away from the circumference of the sealing groove extends to the outer wall of the bucket cover and is matched into the mating groove. The technical problem that injection moulding barrel is not high-temperature-resistant in the prior art is solved.

The utility model provides a connecting structure which comprises a clamping groove and a clamping hook. A first clamping part and an abutting part are arranged in the clamping groove, and the clamping groove is used for being connected with a first block to be connected; the clamping hook is provided with a second clamping part matched with the first clamping part, and when the clamping hook rotates and is clamped in the clamping groove, the first clamping part abuts against the second clamping part, and the clamping hook abuts against the abutting part; the clamping hook is used for being connected with a second to-be-connected block. According to the utility model, the problems that the traditional clamping structure is troublesome to install and the insertion alignment depends on the manual insertion precision are solved; 2, the problem that the insertion is too loose and shakes due to machining tolerance or the insertion is difficult when the insertion is too tight is solved; and 3, the problem of back-off rebound failure caused by material fatigue after long-term use is solved.