157 results about "Relative slip" patented technology

The invention discloses a grinding and polishing removal error compensation control method considering the dynamic error of a robot, and the method achieves the prediction of the grinding and polishing removal depth through the building of a grinding and polishing removal depth prediction model considering the dynamic error of the robot, and solves the problem of non-linear distribution of the contact pressure and relative sliding speed of a side edge during the machining of the side edge. The limitation of a traditional Hertz model in narrow space side blade contact mechanical modeling is broken through, and accurate prediction of the grinding and polishing removal amount and the surface appearance is achieved; and then an offline-online collaborative layered compensation mechanism is provided, a space-time transmission mechanism of robot errors under time-varying dynamics is identified, accurate tracking of a deterministic grinding and polishing trajectory is achieved, and the grinding and polishing contour precision of the whole component is improved.

The utility model discloses a square steel tube with an inbreak angle and an anti-slip concrete filled steel tubular column with the inbreak angle, which relate to the field of constructional engineering, and comprise the square steel tube with the inbreak angle, the square steel tube with the inbreak angle is built together through a plurality of single sections, and the upper end face and the lower end face of the built square steel tube are closed along with the shape. And the concrete is poured into the inner cavity of the square steel tube with the inner break angle and is bonded into a whole. The steel pipe concrete column is ingenious in conception and reasonable in layout, and the folded inner folding angle can play a better role in restraining concrete in the column, so that relative slippage between the steel pipe and the concrete at the inner folding angle is effectively reduced, and the overall stress performance of the steel pipe concrete column is improved.

The invention discloses a dual-mold linkage demolding work station for manufacturing a recycled concrete prefabricated member, and relates to the technical field of recycled concrete prefabricated member production, the dual-mold linkage demolding work station comprises a conveying mechanism and two sets of demolding mechanisms, and the conveying mechanism comprises an input part, an output part and a demolding part; each group of demolding mechanism comprises a rack which is arranged on the demolding part and is internally provided with a convex block; the sliding block is slidably arranged on the rack, a wedge-shaped block is elastically slidably mounted in the sliding block, and a lifting part is elastically slidably mounted at the bottom of the sliding block; the clamping part comprises a base, a pair of clamps and a telescopic part; the base is rotationally arranged on the inner side of the sliding block, and the clamps are arranged on the two sides of the base respectively. Each clamp is provided with an induction piece and is elastically connected with a lifting piece. The overturning part is used for driving the base to rotate; the lifting part drives the sliding block to lift through a lifting piece; controllable relative sliding of the component and the mold is achieved through cooperative control, impact vibration and damage to a mortar bonding layer are avoided, the lifting force is adjusted in real time according to the gravity of the component, and the demolding force is accurately matched.

The present invention relates to the technical field of plastic bag processing, and discloses a shearing guide device for plastic packaging bags, comprising a front crossbeam 1, a guide portion 4 being provided on the front crossbeam 1 for guiding a flattening tool to contact or stay away from stacked plastic bags, the guide portion 4 comprising an L-shaped arm 41, the bottom end of the L-shaped arm 41 being fixedly connected to the top of one end of the front crossbeam 1, the top of the L-shaped arm 41 being fixedly connected to a sliding sleeve 42, a guide groove 44 being provided at the top of the L-shaped arm 41, the guide groove 44 being located in the sliding sleeve 42, a tension portion 5 being provided on the guide portion 4 for providing tension and flattening the surface of the stacked plastic bags, the device adopts a gear rack mechanism driven by a motor of the guide portion, so that a roller applies adjustable tension to the free side of the plastic bag, forming a dynamic balance with the unilateral pressure of the clamping portion, effectively offsetting the nonlinear stress field inside the stack, reducing the relative slip between layers, and solving the dislocation problem caused by excessive shear stress on the free side.

The utility model discloses a quick-installation circuit breaker interlocking mechanism, relates to the technical field of circuit breaker accessories, and solves the defects of high complexity and the like. Comprising a clamping base, a movable top plate and a center shaft are arranged on the top face of the clamping base, a long-strip-shaped sliding hole formed in the width direction of the clamping base is formed in the movable top plate, and the center shaft is arranged in the long-strip-shaped sliding hole in a penetrating mode from top to bottom; a tilted guide arm is fixed on the top surface of the clamping seat, and the guide arm tilts to be placed in the long-strip sliding hole, is in contact with the hole wall of the long-strip sliding hole and slides relative to the hole wall of the long-strip sliding hole; the movable top plate is provided with a blocking face and a side blocking face, when the movable top plate moves to the position above the corresponding circuit breaker, the blocking face abuts against the handle of the circuit breaker to limit closing of the handle, and the side blocking face abuts against the handle of the other circuit breaker in a matched mode in the width direction. A traditional multi-component linkage mechanical interlocking structure is simplified, the number of parts is reduced, the manufacturing cost is reduced, operation is more visual, and by adjusting the size of the movable top plate, the circuit breaker interlocking device is suitable for circuit breakers of different specifications.

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.

The utility model relates to the technical field of earthquake resistance, in particular to a novel building earthquake-resistant support. The shock-insulation support comprises a lower mounting plate and an upper mounting plate, the upper mounting plate is assembled at the top of the lower mounting plate, a spherical support shock-absorption mechanism is assembled between the lower mounting plate and the upper mounting plate, and a shock-insulation support shock-absorption mechanism is further assembled between the lower mounting plate and the upper mounting plate. By means of the structural design of the spherical support damping mechanism, the lower spherical plate, the spherical plate and the upper spherical plate slide relatively, so that a building displaces in the horizontal direction when an earthquake occurs, and damage of the earthquake to the building is reduced; and through the structural design of the shock absorption mechanism of the shock insulation support, a plurality of rubber layers and steel plate layers are alternately overlapped, the effect of isolating an earthquake is achieved while the weight is borne, and all the parts are protected through the rubber protection sleeve to ensure the service life of the shock insulation support.

The application relates to the field of lifting equipment, in particular to a lifting robot capable of emergency stop. The lifting robot comprises a machine shell, a rolling disc assembly, a guide assembly, an emergency stop mechanism and a limiting mechanism; a driving device is arranged in the machine shell; the rolling disc assembly is provided with a rope passing channel, and the rolling disc assembly is connected with the output end of the driving device; the guide assembly comprises a guide wheel and a guide frame; the emergency stop mechanism comprises a fixing base, an abutting frame, a pressing handle, a fixing sleeve, a torsional spring, a sliding rod, a sliding frame and an elastic piece b; the fixing sleeve is arranged on the fixing base and abuts the abutting frame on the fixing base; a plurality of limiting grooves are circumferentially arranged at the end of the abutting frame away from the fixing sleeve; the torsional spring is sleeved on the outer periphery of the fixing sleeve and connected with the fixing sleeve and the abutting frame at two ends; and the limiting mechanism is arranged on the fixing base and forms a rope passing space with the fixing base. The lifting robot can conveniently abut the rope by pressing the pressing handle, so as to prevent relative slipping.

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.

The application discloses a kind of automobile door electric opening and closing mechanism, it is related to automobile technical field, it includes: transmission part, the transmission part includes moving rod and hinged seat, hinged seat is fixed in vehicle body, moving rod one end is hinged with hinged seat;Moving rod telescopic sliding fit in the inside of door, door is formed with radial limit to transmission part;Door opening and closing process drives moving rod to rotate around the hinged axis of hinged seat, and moving rod and door are relatively slipped along the length direction of moving rod itself;Driving part, the driving part is fixed in the inside of door and is synchronous with door movement, driving part power output end is transmission cooperation with moving rod;Driving part works by moving rod to vehicle body and applies pulling force or thrust, and the reaction force of vehicle body is used to drive door to complete electric opening and closing relative to vehicle body.This application has the effect of simplifying existing door opening and closing structure, improving space utilization, reducing production cost.

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.

The utility model discloses a stator iron core and a motor, the stator iron core comprises a first iron core punching sheet group, the first iron core punching sheet group comprises a plurality of first iron core punching sheets which are stacked along the axial direction, each first iron core punching sheet comprises a plurality of first oil inlet grooves which are arranged at intervals along the circumferential direction, and the first oil inlet grooves extend inwards from the periphery of the first iron core punching sheets; each first oil inlet groove comprises a first oil inlet and a closed end which are arranged from outside to inside, the sectional area of the first oil inlet is smaller than that of the closed end, and the first oil inlet grooves of every two adjacent first iron core punching sheets are in one-to-one correspondence in the axial direction to form a plurality of first oil inlet channels. According to the utility model, on the premise of ensuring the cooling of the stator core and the winding, the contact area between the stator core and the shell can be increased, the friction force between the stator core and the shell is improved, relative slippage does not occur between the stator core and the shell in the operation process of the motor, and the safety coefficient is higher.

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 device for the relative sliding of a formwork for casting a reinforced concrete approach bridge and a main bridge end crossbeam, which comprises a bracket that supports the formwork upward from the foundation. The bracket extends above the end crossbeam. A bottom steel plate is fixed on the top surface of the end crossbeam. Multiple pairs of limiting round steel bars are fixed on the upper surface of the bottom steel plate, and a rolling round steel bar is in rolling fit. A bracket support steel plate is arranged on the top surfaces of multiple rolling round steel bars. The bracket extending above the end crossbeam is fixed on the bracket support steel plate. The longitudinal displacement of the end crossbeam caused by temperature change in a through-type steel truss arch bridge drives the bottom steel plate and multiple pairs of small-diameter limiting round steel bars to displace in the length direction of the arch bridge, thereby driving the rolling round steel bar to roll relative to the bracket support steel plate, so that the bracket and the formwork remain stationary while the end crossbeam longitudinally slides relative to the bracket support steel plate. This sliding device can compensate for the longitudinal displacement caused by temperature change in the steel truss arch bridge to prevent the longitudinal displacement of the end crossbeam during the construction process from causing the formwork support to tilt or even overturn.

The present invention provides a lifting trolley for testing a high-voltage circuit breaker. The lifting trolley adopts manual adjustment through a first-level adjustment component. The adjustment component adopts a trapezoidal screw adjustment and a fixing ring is installed on the screw shaft. After the position adjustment is completed, the fixing ring is locked to tighten the trapezoidal screw. The lifting component adopts a scissor-type lifting structure, which can greatly save the space occupied by the lifting trolley and facilitate transportation. The second-level fine-tuning component adopts a double nut anti-skid method, which can effectively prevent the relative slip between the nut and the screw, and thus can effectively adjust the lifting and lowering of the screw. The fixing component is fixed with a spring-type screw, and the connection between the lifting trolley and the test platform is more firm, avoiding the change of the benchmark between the high-voltage circuit breaker and the test platform during testing. After the lifting trolley is disconnected from the circuit breaker, the screw can be completely reset under the action of the spring.

The utility model discloses a prefabricated assembly type frame structure damper which comprises a prefabricated concrete column, the right side of the prefabricated concrete column is fixedly connected with a column embedded part, the right side of the column embedded part is provided with a beam embedded part, the right side of the beam embedded part is provided with a prefabricated concrete beam, and the prefabricated concrete beam is fixedly connected with the column embedded part. The top of the column embedded part and the top of the beam embedded part are each provided with a first flange cover plate. When an earthquake comes and before a prefabricated node does not reach a relative slippage bending moment, relative slippage is generated after friction force between a web, a flange cover plate and an embedded part reaches the maximum value of static friction force, and the node bending moment reaches a sliding bending moment; the displacement of the cover plates and the embedded parts reaches the maximum value, the stress of the bolts is converted, the joints are stressed through connection, in the process, except the cover plates which are replaceable energy consumption parts, other parts and concrete basically work elastically, and only damaged parts need to be replaced after an earthquake.

The invention provides a supporting mechanism for surrounding rock instability in the chamber excavation process, and belongs to the technical field of chamber supporting. The supporting plate is hinged to one side of the bottom plate; one end of the supporting rod is connected with the supporting plate, and the other end is connected with the bottom plate; a drill bit is arranged at one end of the telescopic anchoring rod, and the telescopic anchoring rod is obliquely arranged; the second driving device is used for driving the telescopic anchoring rod to stretch out and draw back; in the supporting state, the telescopic anchoring rod penetrates through the positioning hole, and the drill bit is drilled into the ground. By additionally arranging the telescopic anchoring rods which are obliquely arranged on the bottom plate, the resistance of the supporting structure to stress in the horizontal direction can be improved, relative slippage between the supporting plate and a rock mass is not prone to occurring, and the supporting effect is enhanced. By arranging the first wiping ring and the second wiping ring on the periphery of the telescopic anchoring rod in a sleeving mode, the double cleaning effect on the periphery of the telescopic anchoring rod is achieved, and the supporting structure has the self-cleaning function.

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 relates to the technical field of bridge structures, in particular to a trapezoidal scale type directional anti-pulling and non-shear-resisting connecting device and a manufacturing method thereof.The trapezoidal scale type directional anti-pulling and non-shear-resisting connecting device comprises a connecting piece, outer wrapping metal sheets and reinforcing steel bars, a cavity used for pouring concrete is formed in the obliquely-arranged connecting piece, and a transverse hole is formed in the connecting piece; the outer wrapping metal sheet is matched with the connecting piece in shape and arranged on the outer surface of the connecting piece in an attached mode, and a transverse through hole corresponding to the transverse open hole of the connecting piece is formed in the outer wrapping metal sheet; the steel bars penetrate through the transverse open holes of the connecting pieces and the transverse through holes of the outer wrapping metal sheets and penetrate through the connecting pieces and the outer wrapping metal sheets. The connecting piece is designed to be of the inclined structure with the inner cavity, when concrete is poured, the cavity can be filled with the concrete, the concrete and the outer concrete plate form a whole, a sliding interface is constructed, and when the device bears longitudinal loads, controllable and directional relative sliding can be generated in the inclined direction.

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.

The invention relates to a load transfer analysis method, system, equipment and medium based on a CFSC structure of a steel-concrete combined section, and the method comprises the steps: building a unit mechanical model of the CFSC structure based on equivalent spring assumption, proposing a first balance equation of the unit mechanical model, setting a node interval for the unit mechanical model, and setting a second balance equation for the unit mechanical model; deducing the first balance equation based on the node interval to obtain a first load transfer expression of the unit mechanical model; deducing the first load transfer expression based on interface bonding force analysis, interface relative slip analysis, interface friction force analysis, shear load analysis and difference estimation analysis to obtain a second load transfer expression; a combined mechanical model of the steel-concrete joint structure is constructed, the steel-concrete joint structure comprises a plurality of CFSC structure units, a second balance equation of the combined mechanical model is proposed based on the strain plane section assumption, the second balance equation is deduced based on the variable matrix, and a third load transfer expression of the combined mechanical model is obtained.

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.

The present disclosure relates to the technical field of highway engineering tunnel construction, and particularly relates to a collapsible arch frame device, which includes two arch frames arranged circumferentially along the tunnel. Steel plates are provided on both sides of the connection between the two arch frames. Mounting holes are provided on the steel plates, and bolts are inserted through the mounting holes. Elastic members and nuts are sequentially sleeved on the parts of the bolts passing through the two steel plates. The two ends of the elastic member are respectively abutted against the nut and the steel plate to fix the steel plate. A multi-stage tooth structure is provided along the length direction on the side of the steel plate close to the steel arch frame, and a limiting member is fixedly provided at one end of the arch frame close to the steel plate, and the limiting member is meshed and cooperated with the multi-stage tooth structure. By providing the steel plate and the bolt, the two arch frames can be connected. By providing the elastic member and the multi-stage tooth structure, the two arch frames can not only collapse in the radial direction of the tunnel, but also produce relative sliding in the circumferential direction of the tunnel. Through the combination of the two deformation and displacement modes, various complex geological rock strata changes can be adapted, and the arch frame can be prevented from being damaged.

The present invention discloses a two-stage pressure-yielding anchor rod device and method capable of monitoring preload, which belongs to the field of underground engineering support such as lanes, tunnels and tunnels. It includes a special-shaped anchor rod and a preload monitoring device, etc. The special-shaped anchor rod includes a special-shaped hollow anchor rod and a solid anchor rod that are combined with each other. The solid anchor rod is arranged at the front end of the special-shaped hollow anchor rod, and the end of the special-shaped hollow anchor rod is provided with a sliding cavity that matches the tail of the solid anchor rod. The tail of the solid anchor rod and the sliding cavity of the end of the special-shaped hollow anchor rod are intersected and combined to form a piston structure that can slide relatively. A preload monitoring device is provided at the intersection; when the surrounding rock undergoes large deformation, the device can simultaneously achieve constant resistance large deformation, ensure that the anchor rod and the anchoring structure are not damaged, and can also read the preload. Its structure can not only achieve the pressure-yielding effect, but also accurately monitor the size of the preload in real time. It has the advantages of diverse functions, accurate data, reasonable structure, and economic applicability.

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 invention belongs to the technical field of anchor rod detection, and particularly relates to an anchor rod anchoring strength detection device which comprises a drawing machine, the drawing machine comprises a workbench, a fixing plate is slidably connected to the upper portion of the workbench, a bonding layer is formed at the joint of a clamp and an anchor rod after an anchoring agent is cured, the friction force between the clamp and the anchor rod is remarkably increased, and the anchoring strength of the anchor rod is improved. The enhanced friction force is beneficial for reducing relative slippage between the anchor rod and the clamp in the drawing process, improving the clamping stability and further improving the accuracy of test data, meanwhile, vibration is transmitted into an anchoring agent through the arc-shaped clamping plate, a more uniform microstructure is beneficial for forming, stress concentration points are reduced, and the tensile strength of the anchor rod is improved. And secondly, the anchoring agent in the inner cavity of the supporting block can be stirred through rotation of the stirring rod, so that the layering or precipitation phenomenon possibly existing in the anchoring agent can be broken, internal components are more uniformly mixed, and the interior of the flowing-out anchoring agent is more uniform.