87 results about "Relative slip" patented technology

The invention discloses an external prestress design method and system combined with a shield segment pre-embedded sliding groove, and the method comprises the steps: after the shield segment is assembled, anchoring a steel beam at the outer side of the segment through the sliding groove, arranging a plurality of displacement sensors along the segment pre-embedded sliding groove, obtaining the actual displacement data of the steel beam at different tensioning stages, and calculating the actual displacement data of the steel beam; calculating the relative slippage displacement between the steel beam and the sliding chute at a certain position along the direction of the sliding chute; according to initial prestress tension applied to the tensioning end and the relative slippage displacement, effective prestress tension transmitted to the duct piece through the steel beam at a certain position in the sliding groove direction is calculated, and according to the effective prestress tension, the maximum forward main stress of the section at the certain position in the sliding groove direction is calculated; and according to the relative slippage displacement and the maximum forward principal stress, setting a comprehensive design objective function, and adjusting a design variable to enable the comprehensive design objective function to be optimal.

This invention belongs to the field of bridge construction, specifically a method for ensuring bridge bearings meet the requirements of tension displacement and seismic consolidation. The method involves filling the relative sliding areas inside the bridge bearing with a medium, which is a soft, elastic material. Before filling, the medium is encapsulated in a medium membrane. During bridge tensioning, if the tensioning speed is less than the design value, the medium deforms, releasing the tension stress at the relative sliding areas inside the bridge bearing. During an earthquake, if the displacement speed exceeds the design value, the medium remains unchanged, thus consolidating the bridge bearing with the bridge deck and piers as a unified whole to jointly withstand seismic forces. This invention, by filling the bridge bearing with a medium, enables the bridge bearing to function normally during bridge erection and under special conditions such as earthquakes, thus improving the functionality of bridge bearings.

The application discloses a locking oil cylinder connecting structure for an injection molding machine, which is characterized in that a first spherical surface structure is arranged at one end of a piston rod of the locking oil cylinder, a convex circular arc surface is arranged on a nut, and a concave circular arc surface is arranged on a nut pad block, so that when a micro-arch deformation of a movable die plate occurs, the first spherical surface structure can slightly move in a cylinder sleeve, thereby reducing the eccentricity of the piston rod caused by the deformation of the movable die plate; meanwhile, the piston rod offset drives the nut to offset, so that the convex circular arc surface on the nut relatively slides along the concave circular arc surface of the nut pad block, so that the piston rod cannot keep a deformed state, and the piston rod can keep in the center position of the cylinder sleeve, thereby effectively preventing the occurrence of oil seepage.

The invention discloses a high-strength anti-aging rubber sealing ring and a preparation method thereof, and belongs to the technical field of sealing rings, the rubber sealing ring is endowed with excellent mechanical properties by taking a self-synthesized expansive type dispersion filler as a reinforcing phase, the expansive type dispersion filler is of a core-shell structure, a core layer is made of expanded graphite, a shell layer is made of brush-shaped silicon dioxide, and the expansive type dispersion filler is of a core-shell structure. The composite structure can disperse stress by generating relative slippage, and brush-shaped silicon dioxide can physically block oxygen and heat, so that permeation of oxygen into rubber at high temperature is reduced, and oxidative fracture of a rubber molecular chain is delayed; when the high-strength anti-aging rubber sealing ring is used in a high-temperature scene, the expansion type dispersion filler can expand, the expansion effect can fill tiny cracks and pores generated by thermal expansion and cold contraction of a rubber matrix, and permeation of oxygen and heat aging factors into rubber is reduced.

This application relates to a machine tool for machining irregularly shaped shafts, specifically in the field of shaft machining. It includes a bed and a center rest. The bed is rotatably connected to a chuck for clamping and rotating the workpiece. The center rest includes an inner ring and an outer ring, both coaxial with the rotation axis of the chuck. The lower end of the outer ring is slidably connected to the bed in a horizontal direction. The inner ring and outer ring are rotatably connected coaxially. The inner ring has several support claws arranged circumferentially, one end of each support claw serving as an abutment end extending into the inner ring. The inner ring is equipped with an adjustment assembly for adjusting the distance between the abutment end and the inner ring axis. After the shaft workpiece enters the center rest, the abutment end abuts and limits the workpiece from different directions. The rotation of the workpiece causes the inner ring to rotate synchronously. Because there is no relative slippage between the support claws and the workpiece, regardless of whether the workpiece cross-section is perfectly circular, it provides good support for the workpiece. Therefore, there is no need for pre-machining of grooves, thus improving machining efficiency.

This invention discloses a corrugated interlocking FRP component connection node and connection method, belonging to the field of civil engineering technology. The connection node includes an FRP component, steel fasteners, a structural adhesive layer, and high-strength bolts. The contact surfaces of the FRP component and the steel fasteners are both processed into matching corrugated interfaces. A structural adhesive layer is placed between the corrugated interfaces, and the connection is achieved through assembly with high-strength bolts. Compared to traditional adhesive-bolt hybrid connection nodes, this invention utilizes the corrugated interlocking interface to enhance the force transmission path. The corrugated interface extends the shear path of the adhesive layer and increases the effective bonding area. When the interface exhibits a relative slippage tendency, the corrugated interface provides anti-slip capability through the interlocking of crests and troughs. This results in a synergistic force transmission structure where corrugated interlocking, interface bonding, and bolt bearing work together, thereby reducing stress concentration at the hole edges and improving the stiffness, load-bearing capacity, and overall synergistic stress performance of the connection node.

The invention discloses a telescopic crane rail connector, a rail system and a mounting method, and relates to the technical field of crane rail connecting devices of heavy-load moving vehicles. The connector is arranged between a first track and a second track and comprises a base, a first connector, a second connector, a locking mechanism and a restraining mechanism. The base is fixed to a foundation, the first connector is integrally connected with the first rail, the second connector is integrally connected with the second rail, and the joint faces of the first connector and the second connector form a non-orthogonal continuous interface in the longitudinal direction of the rails to guide wheels to achieve smooth transition. The locking mechanism can releasably maintain the joint of the two and allow the two to relatively slide along the longitudinal direction of the track under temperature stress; the bottom of the restraining mechanism is fixed to the base, and the top of the restraining mechanism is connected with the lower portion of the first connector and / or the second connector to limit vertical and transverse displacement. The connector adapts to adverse effects of temperature changes on the track, and ensures stable and safe operation of the vehicle.

The invention relates to a follow-up material supporting technology for aluminum curtain wall plate bending forming, and belongs to the technical field of metal plate machining. A material supporting area is divided into a first near-bending area, a second middle supporting area and a third free end follow-up area, and differentiated material supporting modes of avoiding guiding, same-speed face supporting and rolling traction are adopted; the middle area and the free end area are jointly arranged on the same follow-up base, so that self-driving synchronous follow-up of the plate is realized, and the problems of relative slippage, geometric interference, overhigh local pressure intensity, unstable supporting and the like caused by displacement and overturning of the plate during fixed material supporting in the prior art are effectively solved; the surface defects of scratches, indentations, atomization marks and the like of the visual surface of the aluminum curtain wall plate are remarkably reduced, meanwhile, the consistency and the rebound stability of the bending angle are improved through stable load transfer and continuous surface supporting, and therefore reliable machining under the working conditions of deep bending and high flanging is achieved on the premise that the high appearance quality is guaranteed.

The invention provides a nondestructive testing system and method for the bearing capacity of an uplift pile, and the system comprises a strain sensing unit which comprises a distributed annular fiber grating array disposed on a target uplift pile and is used for detecting the strain information of the target uplift pile on the whole pile length; the displacement monitoring unit comprises an MEMS inclinometer and a laser range finder which are arranged at the top of the pile, and an LVDT displacement meter pre-embedded in a pile-soil interface, and is used for synchronously monitoring absolute displacement and relative slippage of the target uplift pile; and the processor unit is used for carrying out inversion calculation on the bearing capacity of the target uplift pile by adopting an FPGA accelerated LSTM-GRU hybrid neural network based on the strain information, the absolute displacement and the relative slippage. According to the method, the differential coupling model of the axial strain of the pile body, the relative displacement of the pile soil and the side friction resistance is established, accurate mapping from the distributed optical fiber strain to the bearing capacity subitem index is achieved, therefore, the nondestructive testing target is achieved, the detection cost is low, and the detection accuracy and reliability are high.

A supporting structure of a feeding conveying line of a tower belt machine comprises a plurality of stand columns arranged at intervals and a feeding line erected on the stand columns and used for conveying concrete, climbing sleeve frames are installed on part of the stand columns, rolling supports are installed on the top faces of the climbing sleeve frames and part of the stand columns, and rotating supports are installed on part of the stand columns. The feeding line is in lap joint with the rolling support and the rotating support, and the feeding line and the rolling support slide relatively. According to the design of the supporting structure, the height and angle of the feeding conveying line can be adaptively adjusted according to the change of the concrete pouring height.

This invention relates to a symmetrical, stable, and collapsible mechanism, comprising a mounting base, an adjusting base, and a contact arm. The contact arm is rotatably mounted on the mounting base. The mounting base and the adjusting base are axially slidably disposed relative to each other along a transmission shaft. A collapsible assembly is disposed on the adjusting base. When the mounting base and the adjusting base move relative to each other, a limiting rod slides and abuts against a sliding member, pushing the sliding member to rotate around a pivot point, causing the telescopic elastic member to stretch or compress. The collapsible assembly further includes a connecting rod, one end of which is rotatably mounted on the adjusting base, and the other end is hinged to the contact arm. When the mounting base and the adjusting base slide relative to each other, the contact arm swings under the action of the connecting rod. Using the above technical solution, this invention has a simple structure, rapid response, stable output of massage force during normal operation, and rapid collapse upon impact, effectively reducing the risk of injury to occupants.

The utility model relates to transformer iron core technical field, concretely is a kind of anti-displacement staggered buckling dry-type transformer iron core, including iron core column body and the iron yoke of adaptation, the iron core column body top end is equipped with the overlap end, and the iron yoke end side is all provided with overlap end, the overlap end of the iron core column body is spaced apart and is provided with multiple recess parts, the overlap end of the iron yoke is provided with the protruding part of the recess part complement, the utility model utilizes the mechanical limiting action of concave-convex structure and limits the relative slip between iron core column body and iron yoke, the purpose of preventing iron core column body and iron yoke from displacement in the process of transportation, installation and operation is realized.

The application discloses a continuous type mechanical arm in the technical field of micro mechanical arms and an acquisition method thereof, and aims to solve the problems of the continuous type mechanical arm and the acquisition method thereof in the prior art. The continuous type mechanical arm comprises two spiral bodies and engaging structures of the two spiral bodies. The two spiral bodies can be engaged with each other, and the engaging structures can meet the action requirements of the curved arm body through the engagement effect between the engaging structures, and can provide better structural rigidity, thereby significantly inhibiting the axial instability and relative slip of the framework under high antagonistic tension from the bottom layer of the configuration, breaking through the technical bottleneck of the bearing limitation of the conventional flexible framework, realizing the significant enhancement of the macro equivalent rigidity, and improving the bearing capacity of the mechanical arm. The corresponding acquisition method fully considers that the engaging structure is the primary factor influencing the bending and action capacity of the continuous type mechanical arm, and therefore, the outer diameter of the mechanical arm is taken as the primary design parameter, and the iterative design of the design parameters of the engaging structure is carried out based on the design background. The method is simple and clear, and the design efficiency is improved.

The invention discloses a beam seam dislocation type bidirectional sliding anti-seismic railway steel rail fastener system which comprises a steel rail, an iron base plate, a sleeper, a rail clamping plate and an elastic steel plate, an insulating strip is arranged between the elastic steel plate and the hole wall of a strip-shaped through hole of the steel rail, a rubber base plate is arranged between the steel rail and the iron base plate, and the elastic steel plate is arranged between the rubber base plate and the iron base plate. The insulating friction base plate is arranged between the iron base plate and the sleeper, and the main beam is allowed to drive the sleeper to move transversely when the earthquake beam seam is transversely staggered, so that transverse relative displacement is generated between the steel rail and the elastic steel plate, and structural damage is avoided. Through the strip-shaped through holes, the elastic steel plates and three layers of friction interfaces, the two-way displacement freedom degree of the steel rails is achieved, and the problem that the steel rails and fasteners are extruded and damaged due to beam seam dislocation under an earthquake is solved. During an earthquake, the sleeper drives the elastic steel plate to move transversely and generate relative slippage with the steel rail to release stress, structural damage is avoided, only the anchor bolts need to be tightened again after the earthquake, parts do not need to be replaced, and the first-aid repair time is shortened.

The application relates to the field of electronic component connectors and discloses a vibration-resistant enhanced structure of a DDR module connector and a preparation method, which comprises an insulating body, a negative Poisson's ratio microskeleton array, a piezoelectric doped shear thickening gel, an asymmetric dielectric guide rail and a microfluid pressure relief flow channel, a slot for accommodating a DDR module is arranged in the insulating body, and a metal terminal array is embedded in the two side walls of the slot in the longitudinal direction. In the application, the self-adaptive mechanical locking mechanism is constructed by the negative Poisson's ratio microskeleton array and the piezoelectric doped shear thickening gel, under the vibration working condition, the longitudinal micro-displacement makes the cells be stretched to produce transverse expansion deformation, lateral pressure is applied to the DDR module, the local shear rate is increased to promote the agglomeration of nanoparticles in the gel, and the nanoparticles are changed from a liquid phase into a solid phase. The structure dissipates kinetic energy by internal friction, effectively limits the relative sliding of the DDR module and avoids fretting wear of the golden fingers.

The invention discloses a method for improving and eliminating slip of a sheet of a wet-process diaphragm longitudinal stretcher. The method comprises the following steps: S1, adopting low-tension and stable-speed control at a preheating section; s2, a mode of combining gradient acceleration and sectional type self-adaptive pressing force is adopted in the stretching section, and friction force reduction caused by an oil film is compensated; and S3, speed closed-loop adjustment is adopted in the shaping section, and the deviation between the roller surface speed and the sheet running speed is corrected in real time. Through precise speed matching and tension closed-loop compensation, friction force attenuation caused by an oil film is actively compensated, no relative sliding exists between a roller surface and a sheet in the whole longitudinal stretching process, the problems of sliding, deviation, shaking and the like which troubles the industry for a long time are effectively solved, continuous and stable operation of a wet diaphragm under high-speed and wide-width production can be ensured, and the production efficiency is improved. Meanwhile, power consumption is optimized, and the development direction of intelligent manufacturing and green manufacturing is met; the strict requirements of high-end lithium battery diaphragms on ultra-thinness and high strength can be met, the product quality is high, the productivity is high, and the popularization and application value is huge.

The invention discloses a displacement triggering type expandable anchor rod and a supporting construction method. The displacement triggering type expandable anchor rod comprises an anchor rod body, a friction sliding sleeve, an expansion anchoring mechanism, a conical head and a limiting component. The friction sliding sleeve is coaxially arranged outside the anchor rod body in a sleeving mode, and the friction sliding sleeve and the anchor rod body form a friction matching structure which slides relative to the anchor rod body in the axial direction. The expansion anchoring mechanism is circumferentially arranged at the anchoring end of the anchor rod body, one end of the expansion anchoring mechanism is hinged to the conical head, and the other end of the expansion anchoring mechanism is hinged to the friction sliding sleeve. The limiting component is arranged on the anchor rod body and used for limiting the sliding stroke of the friction sliding sleeve and triggering the expansion action of the expansion anchoring mechanism. Through the staged design of initial stabilization, triggering expansion and sliding energy absorption, the anchoring stability of the rock-soil body during small deformation is guaranteed, the energy absorption requirement during large deformation is met, and the device adapts to the deformation characteristic of the complex rock-soil body; the friction sliding sleeve is driven to move through self deformation of the rock-soil body, and automatic triggering of the expansion anchoring mechanism is achieved in cooperation with triggering positioning of the limiting component.

The invention discloses a steel-concrete combined member with high-strength interface adhesion and a production method thereof, which are applied to the building field, and the steel-concrete combined member is characterized in that a groove structure is formed on the surface of pi-shaped section steel through hot rolling, concrete slurry is filled into a groove during pouring, and after hardening, the concrete slurry and the section steel form mechanical occlusion nested connection, so that relative slippage of the steel-concrete combined member and the section steel is effectively limited; the interface bonding performance and the cooperative stress capacity are remarkably improved, so that the overall bearing capacity of the component is enhanced; the integrated hot-rolled groove structure replaces traditional stud welding, the process is simple, production is facilitated, and the interface bonding effect is better; besides, the adopted composite groove design further increases the steel-concrete contact area on the premise that the process difficulty is not increased, a composite meshing system of linear ribs and point-shaped embedding blocks is formed, the interface bonding force and the mechanical meshing force are synergistically superposed, and the overall stress performance is further improved.

This utility model relates to the field of hoisting operation technology and discloses a hoisting pulley structure, including: a pulley body, a connecting bearing, a wheel and axle assembly, and a fixing assembly. The pulley body has a through groove; multiple connecting bearings are spaced apart in the through groove along the axis of the pulley body; the wheel and axle assembly passes through the connecting bearings, and the outer wall of the wheel and axle assembly is in contact with the inner wall of the connecting bearing; the fixing assembly includes: a pressing member and an expanding member. Multiple sets of receiving mechanisms are spaced apart along the axial direction on the side wall of the wheel and axle assembly. Each set of receiving mechanisms includes multiple receiving grooves spaced apart along the circumference of the wheel and axle assembly. The expanding member is disposed in the receiving groove. One end of the wheel and axle assembly has a pressing groove. The pressing member is disposed in the pressing groove and abuts against one end of the expanding member. The other end of the expanding member abuts against the inner wall of the connecting bearing. This utility model effectively prevents the relative slippage between the connecting bearing and the wheel and axle assembly by pushing the expanding member with the pressing member and pressing it against the inner wall of the connecting bearing, thus ensuring the operational stability of the pulley.

The application discloses a kind of anti-slippage structure between the sound-absorbing layer of electromechanical brake pad and backboard, including inner elastic pusher and outer elastic pusher;The inner elastic pusher one end is fixed in the inner backboard inner screw-in end position, and the other end is fixedly connected with the inner spring piece of corresponding side on mounting bracket, and the inner elastic pusher is in compression state and moves the inner backboard to the inner screw-out end side before braking, so that the inner screw-out end is attached to the inner spring piece of the other side on mounting bracket;The outer elastic pusher one end is fixed in the outer backboard outer screw-in end position, and the other end is fixedly connected with the outer spring piece of corresponding side on mounting bracket, and the outer elastic pusher is in compression state and moves the outer backboard to the outer screw-out end side before braking, so that the outer screw-out end is attached to the outer spring piece of the other side on mounting bracket.It can effectively inhibit the relative slippage between the inner sound-absorbing layer and the inner backboard, and can effectively inhibit the relative slippage between the outer sound-absorbing layer and the outer backboard.

The utility model relates to an anti-loosening nut structure which comprises a nut body, a threaded hole is formed in the nut body in a penetrating mode, an anti-loosening assembly is arranged on the outer side of the nut body, and the anti-loosening assembly comprises a transverse sliding groove which is formed in the outer side of the nut body and communicated with the threaded hole. A vertical sliding groove communicated with the transverse sliding groove is formed in the upper end of the nut body, a stop block transversely slides in the transverse sliding groove, a driving block vertically slides in the vertical sliding groove, the upper end of the driving block protrudes out of the vertical sliding groove, and a transmission structure is connected between the lower end of the driving block and the stop block in a matched mode. The stop block is radially cut into the threads to form blocking, compared with a traditional friction anti-loosening mode, relative slippage of a thread pair caused by high-frequency micro-amplitude vibration can be effectively resisted, and the anti-loosening efficiency is remarkably improved; the anti-loosening assembly is embedded in the nut body, the transverse sliding groove and the vertical sliding groove form a compact linkage space, the thickness is greatly reduced compared with a double-nut structure, and the anti-loosening nut is particularly suitable for assembly of precision equipment with the limited space.

The utility model relates to the field of steel structures, and discloses a shear-resistant reinforced connecting plate for a steel structure, which comprises a supporting frame, a plurality of supporting columns are fixedly connected in a support, two fixing pieces are in threaded connection with the outer parts of the supporting columns, a foundation is fixedly connected with the outer parts of the supporting columns, and the foundation is in threaded connection with the outer parts of the supporting columns. A plurality of inclined supporting rods are fixedly connected into the foundation, a groove is formed in the foundation, a shear key is fixedly connected to the bottom of the support, and a plurality of stiffening ribs are fixedly connected to the left side and the right side of each supporting frame. The inclined supporting plates in the foundation are distributed in a triangular mode, the shear bearing capacity of the joint is improved, the shear key is embedded into the groove of the foundation to form a mechanical meshing structure, and therefore horizontal shear force can be effectively resisted, relative slippage between the support and the foundation is prevented, the shear bearing capacity of the joint is greatly improved, and the shear effect is achieved.

The invention relates to a deep sea non-adhesive flexible vertical pipe which comprises a framework layer, a first sealing layer, a first isolation layer, a first compression-resistant layer, a second compression-resistant layer, a second isolation layer, a first tensile layer, a second tensile layer and a second sealing layer which are sequentially arranged from inside to outside. The relative slippage distance of two adjacent circles of steel belts of the first compression-resistant layer in the axial direction of the vertical pipe is L1, the relative slippage distance of two adjacent circles of steel belts of the second compression-resistant layer in the axial direction of the vertical pipe is L2, L1 is smaller than L2, the steel belt winding helix angle of the first compression-resistant layer is alpha 1, the steel belt winding helix angle of the second compression-resistant layer is alpha 2, and alpha 1 and alpha 2 are different; the winding direction of the steel belt of the first tensile layer is opposite to the winding direction of the steel belt of the second tensile layer. The internal and external pressure resistance of the flexible vertical pipe is improved, and meanwhile the flexible vertical pipe can cope with complex working conditions.

The utility model relates to the field of injection machines, and discloses a belt wheel transmission injection structure which comprises an injection support, a machine barrel fixed on the injection support and a screw concentrically inserted with the machine barrel, and a driving assembly for driving the screw to reciprocate along the axial direction of the machine barrel and a rotating assembly for driving the screw to rotate are arranged between the injection support and the screw. The rotating assembly comprises a second synchronizing wheel rotationally connected to the injection support and arranged outside the screw in a sleeving mode, a motor fixedly arranged below the injection support and a transmission structure arranged between the second synchronizing wheel and the motor and used for driving the second synchronizing wheel to rotate, and the second synchronizing wheel and the screw synchronously rotate and can relatively slide in the axial direction of the screw; according to the injection structure, the motor is fixed to the lower portion of the injection support, and the second synchronous wheel is rotationally connected to the injection support, so that when the screw linearly moves for injection and reinjection, the motor, the transmission structure and the second synchronous wheel cannot move in the axial direction of the machine barrel, and interference with a hopper is avoided.

The invention provides an online eddy current flaw detection automatic detection device for shaft forging silver bright rods of maritime work equipment, and relates to the technical field of detection equipment. The online eddy current flaw detection automatic detection device comprises a conveying table, a conveying belt is arranged on the conveying table, a plurality of placing grooves are formed in the center of the conveying belt, and the silver bright rods are placed in the placing grooves; a righting assembly, a dust removal assembly and a flaw detection assembly are sequentially arranged on the conveying table in the conveying direction of the conveying belt, and the flaw detection assembly comprises an eddy current flaw detection scanner. A traditional manual handheld flaw detection mode is replaced by an automatic conveying structure that the conveying belt is matched with the placing groove, silver bright rods can be orderly positioned and conveyed through the placing groove, and continuous detection can be completed without manual intervention, so that the detection efficiency is greatly improved, and the labor intensity of operators is reduced; and the silver bright rods are limited through the containing grooves, the problem of relative slipping between a traditional conveying belt and the smooth silver bright rods is effectively solved, and the stability of the conveying speed is guaranteed.

The utility model provides an intermediate shaft assembly, a transmission and a vehicle, the intermediate shaft assembly comprises an intermediate driven shaft and a driven large gear, the intermediate driven shaft comprises a connecting shaft section and a plurality of embedded key teeth, the outer side wall of the connecting shaft section serves as a first matching surface, and the embedded key teeth are arranged on the first matching surface at intervals in the circumferential direction; the driven large gear comprises a sleeving shaft sleeve and an embedded shaft sleeve, the sleeving shaft sleeve and the embedded shaft sleeve are adjacently arranged and jointly connected to the connecting shaft section in a sleeving mode, the second matching face of the sleeving shaft sleeve is connected with the first matching face in a matched mode, the embedded shaft sleeve is provided with a plurality of embedded key grooves, and the embedded key grooves are correspondingly connected with the corresponding embedded key teeth. Therefore, the driven bull gear is rotationally connected with the middle driven shaft in a mode that the sleeving shaft sleeve is connected with the connecting shaft section in a matched mode and in a mode that the embedding key groove formed in one end face of the embedding shaft sleeve is connected with the embedding key teeth in a matched mode, and then the interference magnitude of matching of the middle driven shaft and the driven bull gear can be reduced; and the risk of relative slippage of the two can be reduced.

The application discloses a heavy-load off-road differential with large torque output, comprising a differential box body, a reduction gear disc, a first output gear, a second output gear, a planet carrier, an input gear sleeve and an input worm shaft; the input worm shaft moves along the axial direction under the drive of a control rudder, can selectively engage with the input gear sleeve or the reduction gear disc, and realizes the switching between the high-speed direct drive mode and the low-speed torque increasing mode; the reduction gear disc is elastically connected with the input gear sleeve through a transmission abutting disc, an engaging ball groove, a bearing disc, an abutting ball and an elastic supporting piece, has the limited torque buffering function while transmitting power, when the transmitted torque exceeds the set value, the abutting ball is separated from the engaging ball groove to produce relative sliding, overload protection is realized, and the power transmission is automatically restored after the impact is eliminated. The application can switch different transmission ratios according to the vehicle working condition, improve the output torque under the heavy-load off-road working condition, has the overload protection function, and improves the transmission reliability, impact resistance and service life of the differential.

The invention relates to a simplified calculation method and device for settlement of a rigid pile composite foundation and a medium. The calculation method is simplified, on the basis of the assumption theory of an equivalent pier body and bilinear frictional resistance, an equivalent pier body model assumes that relative slippage details of pile soil are ignored, but the core of overall bearing and deformation is grasped, static balance analysis can be conducted on the whole pier body according to the theory, and calculation is greatly simplified; on the basis of the hypothesis theory of bilinear frictional resistance, the frictional resistance which is traditionally considered to be in triangular or nonlinear distribution is simplified to be in a distribution mode that the upper portion and the lower portion of the equal sinking face are both constant values, calculation of the axial force of the pile body is made to be linear, and therefore an equilibrium equation can be directly established; complex simultaneous equation solving in a traditional method is avoided, all parameters have clear physical significance and determination methods, and the method is suitable for different types of rigid pile composite foundations and can adapt to different engineering conditions through parameter adjustment.

The invention discloses a turboprop engine rotor structure which comprises a shell used for wrapping a turboprop engine, a rotor assembly is arranged in the shell and is of a double-rotor structure, a rotating disc and blades are arranged on the rotor assembly, a limiting connecting assembly is arranged between the blades and the rotating disc, and the limiting connecting assembly is mainly composed of a mortise and tenon joint piece and a fixing piece. A plurality of mortises are formed in the rotating disc at equal intervals, extending roots are arranged at the bottom ends of the blades, tenon teeth are arranged at the bottom ends of the extending roots, and the blades are connected through clamping of the tenon teeth and the mortises. Multi-dimensional constraint is formed through a triple connecting structure of tenon tooth-mortise mechanical interlocking, fixed bolt pre-tightening and movable inserting rod limiting, the overall connecting rigidity and the pre-tightening force maintaining capacity of the blades and the rotating disc are remarkably improved, relative sliding and gap generation of the matching faces are effectively restrained, and the service life of the blades and the rotating disc is prolonged. And the risk of fatigue cracks caused by connection failure is reduced.

This application provides a ladder and a maintenance vessel, relating to the field of wind power operation and maintenance technology. The ladder includes: a sliding connection portion on the ladder body; a magnetic suction component disposed at one end of the ladder body opposite to the sliding connection portion, used for connection to the hull; and an anti-capsulation component slidably connected to the sliding connection portion, and used for mounting on the berthing hull. This application achieves a stable connection between the ladder body and the hull through the connection of the magnetic suction component, preventing relative slippage between the ladder body and the hull deck. The anti-capsulation component allows the ladder body to adaptively slide along its extension direction as it floats with the hull, and also provides lateral restraint to the sliding connection portion, effectively limiting the tendency of the ladder body to tilt towards the hull, thereby improving the safety of boarding the vessel.