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73results about How to "Reduce lateral force" patented technology

Slope protection device for hydraulic flood prevention

The invention relates to the technical field of hydraulic flood prevention, in particular to a slope protection device for hydraulic flood prevention. Comprising a support frame; the protection plate is hinged to the supporting frame, and the protection plate is used for preventing water flow from impacting the slope surface; the rotating frame is hinged to the supporting frame, the rotating frame is connected with a sliding block in a sliding mode, and the sliding block is hinged to a connecting rod; the guide frame is fixedly connected to the supporting frame; the push plate is arranged on the connecting rod, the push plate is connected with the guide frame in a sliding mode, and the push plate is used for applying downward force to the connecting rod by means of resistance generated when the push plate pushes water flow to move. When water flow impacts the protection plate, the protection plate is driven to rotate to buffer the impact force of the water flow, meanwhile, downward force is applied to the supporting frame through resistance generated when the push plate moves in water, reinforcing of the connecting position of the supporting frame and the ground is achieved, and therefore the probability that connection between the supporting frame and the ground is loosened is reduced.
Owner:LIAOCHENG DONGCHANGFU DISTRICT WATER CONSERVANCY DEV CORP

Track flat crane loaded with movable crane

The invention discloses a rail platform crane loaded with a movable crane, which overcomes the defects of the rail platform crane in the prior art and has the advantages of wide working range, large hoisting weight, high loading and unloading efficiency, large loading capacity, safety and reliability. The concrete structure comprises a rail flat car, an end wall assembly and a movable crane device, wherein a rail grabbing device, a fixed freight bogie, a movable freight bogie, a lifting hook fixing device, a tool box and the like are arranged on the rail flat car; the end wall assembly comprises an end door assembly and an end stop assembly. The movable crane device comprises a guide rail assembly, a column inserting assembly, a movable platform, a crane, a power unit, a crane guardrail and a wireless remote controller assembly. The end wall assembly is connected with the rail flat car through a hinge and a hinge seat, and the movable crane device is connected with the rail flat car through a column inserting assembly.
Owner:CRRC SHANDONG CO LTD

Wind power blade lifting device

The utility model relates to the technical field of lifting devices for wind power blade production, in particular to a wind power blade lifting device which comprises a moving platform, a displacement mechanism and a towing hook mechanism are arranged on the moving platform, an adjusting box, a fastening box and a fixing box are arranged at the top end of the moving platform, a bearing seat is arranged in the adjusting box, and a bearing seat is arranged in the fixing box. A gear ring is arranged on the bearing seat, a supporting frame is arranged at the top end of the gear ring, a first telescopic mechanism is arranged in the fixing box, a connecting box is arranged between the fixing box and the adjusting box, and a tooth column is arranged between the output end of the first telescopic mechanism and the interior of the adjusting box; according to the structure, through the design of the bearing seat, the angle of the supporting frame can be flexibly adjusted according to the movement of transportation equipment, especially during turning, lateral force borne by the blades is effectively reduced, and the blades are protected against unnecessary stress damage.
Owner:国家电投集团江苏电力有限公司苏州分公司

Stable and safe barrier-free handrail for toilet

The utility model relates to a stable and safe toilet barrier-free handrail, and relates to the technical field of handrails, the stable and safe toilet barrier-free handrail comprises two supporting parts, the two supporting parts are arranged on the two sides of bathroom equipment respectively, each supporting part comprises a supporting rod and a handrail rod, and a connecting assembly is arranged between the handrail rods of the two supporting parts; the connecting assembly connects the two handrails and limits the positions of the two handrails in the horizontal direction. According to the bathroom equipment, the supporting rods and the handrails are arranged on the two sides of the bathroom equipment, so that a human body can be supported through the handrails on the two sides, the lateral force borne by the single supporting rod and the handrails is reduced, and then the two handrails are connected through the connecting assembly; therefore, the probability that the two handrail rods are far away from each other under the lateral acting force of the human body is reduced, the vertical stability of the supporting rods is guaranteed, and the overall stability and safety of the handrail are improved.
Owner:ZHUJI KANGLE MASCH PLASTIC CO LTD

Circulating cooling device for wind power doubly-fed generator

The invention provides a circulating cooling device for a wind power doubly-fed generator, and relates to the technical field of cooling devices.The circulating cooling device comprises a bottom plate and a doubly-fed generator, and the doubly-fed generator is provided with a circulating cooling assembly.The circulating cooling device is characterized in that a first water pump pumps cooling liquid in a cooling liquid treatment box into a second shell through a water outlet pipe; a liquid guide plate guides the cooling liquid to the surface of the doubly-fed generator, so that the doubly-fed generator is cooled by the cooling liquid, then, a second water pump pumps the cooling liquid in a second shell back into a cooling liquid treatment box, the cooling liquid is filtered and purified through a first filter screen, and after cooling is finished, the cooling liquid is discharged through a second water pump; the output end of the transmission motor drives a first transmission wheel, a belt and a second transmission wheel to rotate, so that the belt drives a first fixing block and a first connecting block to move upwards, a first filter screen is lifted out of the cooling liquid treatment box, and attachments on the first filter screen are conveniently cleaned; therefore, the circulating cooling effect of the doubly-fed generator is enhanced.
Owner:HUANENG MIANCHI CLEAN ENERGY CO LTD

Adjustable automobile suspension structure

The invention relates to the technical field of automobile suspension structures, and discloses an adjustable automobile suspension structure which comprises a suspension connecting plate and further comprises a rotating adjusting block and a damping assembly, a limiting baffle is arranged on the front face of the suspension connecting plate, and an adjusting supporting seat is fixedly connected to the top of the suspension connecting plate; and a first connecting bracket is rotationally connected into the suspension connecting plate. An air pressure pushing block is pushed by an arranged second air cylinder to slide in the second air cylinder, a second air pressure pushing rod is pushed to stretch out and draw back through sliding of the air pressure pushing block, an adjusting connecting column pulls a rotating connecting plate to control a second connecting support to be adjusted, and wheels are adjusted to stretch out and draw back through adjustment of the second connecting support. According to the automobile suspension mechanism, the wheel can reach a proper angle when an automobile turns, so that the force is guided when the automobile turns, the lateral force of the automobile is effectively reduced, the running safety of the automobile is improved, and the practicability of the automobile suspension mechanism is ensured.
Owner:李奕飞

Steering error compensation device, method and equipment for multi-hinge and multi-axle vehicle and medium

The invention relates to the field of multi-hinged vehicles, and provides a steering error compensation device, method and equipment for a multi-hinged and multi-axle vehicle and a medium, and the device comprises the steps that steering controllers are arranged on a vehicle head and a vehicle tail respectively; hinge assemblies are arranged between the vehicles. A steering execution assembly is connected to an axle of an axle of each vehicle through a longitudinal pull rod, and the steering execution assemblies are symmetrically arranged on the two sides in the vehicle. The steering angle of the vehicle is compensated through the steering inner wheel difference between the shafts of the vehicle, and the running posture of the whole vehicle is controlled. The road occupation risk of the vehicle is reduced, and the outline envelope width of vehicle driving is effectively reduced. The vehicle attitude control precision is improved, the connection relation between the vehicles is fully decoupled, the transverse stress of the wheels is smaller, the abrasion of the wheels is reduced, the tail amplification coefficient of the vehicle is reduced, and the riding comfort of passengers is improved. The flexibility of the vehicle can be improved, the vehicle can change directions and turn around conveniently, and the integration degree of the steering device is higher.
Owner:CRRC DALIAN CO LTD

High-precision servo electric cylinder

ActiveCN224138840Usolve driftRealize mechanical self-lockingMechanical energy handlingBall screwDrive shaft
The utility model discloses a high-precision servo electric cylinder which comprises an electric cylinder body, a piston rod is arranged at the front end of the electric cylinder body, a guide enhancing assembly is connected to the front end of the piston rod, a transmission assembly is fixedly installed on the outer surface of the rear end of the electric cylinder body, and the guide enhancing assembly comprises a fixing plate, a guide rod, a fixing block and a guide ring. The transmission assembly comprises a worm gear, a rotating shaft, a transmission box, a servo motor, a driving shaft and a worm. According to the high-precision servo electric cylinder, the worm in the transmission assembly is a single-head worm, and the lead angle of the worm is smaller than the equivalent friction angle, so that a worm gear cannot reversely drive the worm, mechanical self-locking is achieved, stability is improved, radial loads can be shared through the arranged guide enhancing assembly and an external guide rail, the lateral force of a ball screw is reduced, and the service life of the ball screw is prolonged. And the bending moment resistance and the vibration resistance are obviously improved (particularly suitable for long-stroke or high-unbalance-load scenes), so that the precision is improved.
Owner:LISHUITE (SUZHOU) INTELLIGENT MFG TECH CO LTD

Redundant power supply automatic switching device of hot plug module

The utility model provides a redundant power supply automatic switching device of a hot plug module, which relates to the technical field of power supply switching equipment, and comprises a socket assembly consisting of a socket cover and a plug assembly consisting of a plug seat and a plug block which are arranged on one side of the socket cover, the plug seat is connected with the socket cover through the plug block, and the plug block is connected with the socket cover through the plug block. Sliding holes are formed in the two ends of the plug block, a trigger rod penetrating through the plug seat is arranged in the plug seat, two connecting plates are arranged at the end, located in the plug seat, of the trigger rod, a rectangular frame is arranged between the two connecting plates, and a conductive column is arranged at the end, close to the plug block, of the rectangular frame; a plug seat of a plug assembly is connected with a socket cover through a plug block with a sliding hole, the sliding hole provides guidance for insertion, so that the plug block can stably move along a set path, during insertion, the plug block pushes a trigger rod, the trigger rod drives a connecting plate and a rectangular frame, a conductive column is in contact with a conductive structure in a socket, and power connection is achieved.
Owner:SHENZHEN YUEFEI IND CONTROL INTELLIGENT TECH CO LTD

A mooring device for tension leg platform pool testing

This invention provides a mooring device for a tension leg platform in a water tank test. The device includes a platform connecting mechanism, a fixing mechanism, and a tensioning mechanism connected in sequence. The platform connecting mechanism includes a first rotary shackle, a tension sensor, a second rotary shackle, a first mooring cable, an elastic component, and a second mooring cable, all connected in sequence. The fixing mechanism includes a first fixing plate and a first pulley thereon. The tensioning mechanism includes a second fixing plate, a second pulley, a cable roller, and a servo motor. The second pulley, cable roller, and servo motor are mounted on the second fixing plate, and the output of the servo motor drives the cable roller to rotate. The second mooring cable is wound around the first and second pulleys and then connected to the cable roller. Using this modular structure for the mooring device facilitates disassembly and maintenance, and allows for component adaptation or replacement according to the test plan. It is highly applicable in situations requiring frequent platform model changes or multiple sets of tests.
Owner:POWERCHINA ZHONGNAN ENG +1

Efficient cutting mechanism of bearing forging machine

The utility model discloses an efficient material cutting mechanism of a bearing forging machine, which belongs to the technical field of forging equipment and comprises a rack and a punch, a punching table capable of placing materials is fixedly arranged on the rack, an overturning groove for accommodating the fallen punch and waste materials is arranged below the punching table, a waste pushing rod with a polygonal cross section is arranged on the rack, and the waste pushing rod is connected with the punching table. The pushing piece guides the waste pushing rod to pass through the falling position of the punch in a reciprocating mode, and a transmission assembly guiding the waste pushing rod to rotate around the axis of the waste pushing rod is arranged between the rack and the waste pushing rod. According to the efficient cutting mechanism of the bearing forging machine, under the action of the pushing piece, the waste pushing rod rotates due to the action of the transmission assembly, the multiple edges on the surface of the waste pushing rod continuously push the punch to jump in the vertical direction, and therefore the transverse acting force applied to the punch in the process that the waste pushing rod pushes waste to be away from the punch is effectively reduced.
Owner:SHAOXING YONGYANG MACHINERY CO LTD

Fabricated house building construction steel structure connecting joint

The utility model provides an assembly type house building construction steel structure connecting joint, which relates to the field of steel structure buildings, and comprises a connecting frame and a cross beam, the cross beam consists of a vertical plate and wing plates, the wing plates are respectively arranged at the top and the bottom of the vertical plate, the vertical plate and the wing plates are I-shaped, and the vertical plate and the wing plates are arranged on the connecting frame. Two sets of first connecting holes are symmetrically formed in the positions, on the two sides of the vertical plate, of the wing plates, two sets of second connecting holes are symmetrically formed in the positions, between the two wing plates, of the vertical plate, and the connecting frame comprises a fixing plate; through the arrangement of the strip-shaped first connecting hole, the strip-shaped second connecting hole and the I-shaped buffer piece, the cross beam has a certain transverse moving space through the strip-shaped first connecting hole and the strip-shaped second connecting hole, so that when the cross beam is elongated or shortened due to heating or cooling, the cross beam can move horizontally; the cross beam does not shear high-strength bolts used when the connecting frame and the cross beam are assembled, meanwhile, the lateral force generated by the cross beam to the stand columns is reduced, and then the connecting safety is improved.
Owner:梁昇安

Method for quickly sitting on pier after semi-floating of ship

PendingCN119429026AReduce the amount of bending deformationreduce lateral forceDry-dockingSlipwaysSternMechanical engineering
The invention discloses a rapid pier setting method after semi-floating of a ship. According to the method, at least two limiting devices are installed on the ship side of a half ship before water enters a dock, the distance from the limiting devices to the stern or the bow of the half ship is 1 / 4-3 / 4 of the total length of the half ship, each limiting device comprises a sliding block welded to a ship side outer plate, a limiting rod penetrates through each sliding block, a base is arranged at the bottom of each limiting rod, and the limiting rods are arranged on the bases. The limiting rod is vertically arranged in the dock through the base, and a gap of 5-15 mm is reserved between the inner wall of the opening of the sliding block and the outer wall of the limiting rod. The problems that in the prior art, when the half ship floats upwards, the allowable trim angle range is small, and the safety risk is high are solved.
Owner:CHINA SHIPPING IND JIANGSU

Protective device for continuously and conveniently extracting gas in goaf

The invention provides a protective device for continuous and convenient extraction of goaf gas, and belongs to the technical field of coal mine gas extraction, an anti-blocking module is arranged at the front end of an extraction pipeline, and a stone pushing plate is arranged at the foremost end of the anti-blocking module. According to the method, multiple sets of extraction pipelines are arranged in the goaf, automatic extraction is achieved, in the extraction process, coal cinder in the goaf is blocked and falls off through the three sets of stone blocking plate semi-rings with the radiuses becoming larger in sequence, the coal cinder falls to the outside through the stone falling pipe groove, and the extraction pipelines are prevented from being blocked; the vertical stress of the device is buffered through multiple sets of buffer spring frames and rubber buffer columns to prevent the device from being crushed, and meanwhile devices used for supporting and fixing are linked and fixed through anti-toppling springs, so that the transverse stress of the device is buffered, and the device is prevented from toppling leftwards and rightwards; the falling objects block the extraction pipeline, the stone pushing plate directly pushes away the loose falling objects with light mass, and when the heavy objects are heavy and cannot be pushed away, the stone hitting micro drill bit is started to crush the falling objects and push away the falling objects, so that the falling objects are prevented from blocking the extraction pipeline.
Owner:TAIYUAN UNIVERSITY OF TECHNOLOGY

Amphibious front suspension system

The invention relates to the field of amphibious vehicles, and discloses an amphibious front suspension system which comprises a mounting base, a drive axle assembly is fixedly mounted in the mounting base, hydraulic cylinders are hinged to the two sides of the top end of the mounting base, and a first connecting block and a second connecting block are fixedly connected to the two sides of the mounting base in the vertical direction correspondingly. The sides, away from each other, of the two first connecting blocks are connected with supporting arms through pin shafts correspondingly, the end, close to the mounting base, of each supporting arm is hinged to the movable end of each hydraulic cylinder, the sides, away from each other, of the two second connecting blocks are connected with an upper fork arm and a lower fork arm through pin shafts correspondingly, and side mounting frames are symmetrically arranged on the two sides of the mounting base. A ball cage universal joint is fixedly installed at the center position of the side installation frame, a tire is arranged on one side of the side installation frame, and a transmission shaft of the tire is fixedly connected with the other end of the ball cage universal joint fixedly installed at the center position of the side installation frame. And the system has higher stability and anti-interference performance.
Owner:ZHUHAI COLLEGE OF JILIN UNIV +1

Exoskeleton knee joint structure capable of adapting to different leg widths

ActiveCN224275121UQuickly adjust binding widthReduce lateral forceProgramme-controlled manipulatorJointsPhysical medicine and rehabilitationKnee joint structure
The utility model discloses an exoskeleton knee joint structure capable of adapting to different leg widths, and aims to solve the problems that an existing exoskeleton knee joint structure supports a skeleton on one side, damage to a knee joint cannot be effectively reduced, even pain and even damage of the knee joint may occur, and a wrapping structure cannot adjust the width size or the adjusting process is complex. The device comprises thigh structures, bionic knee joints, shank structures and binding structures, the thigh structures and the shank structures are hinged through the bionic knee joints, and the binding structures are installed on the inner sides of the thigh structures and the inner sides of the shank structures; each binding structure comprises a BOA screw, a fixing steel wire, an inserting buckle, a fixed binding belt, a movable binding belt and a binding liner, the binding liners in the two binding structures are installed on the inner side of the thigh structure and the inner side of the shank structure respectively, and the fixed binding belts and the movable binding belts are fixed to the two sides of the binding liners respectively.
Owner:YISHITAO INTELLIGENT TECH (SUZHOU) CO LTD

Hydraulic machine with hydraulic plunger structure

The invention relates to the technical field of hydraulic machines, in particular to a hydraulic machine with a hydraulic plunger structure. The hydraulic device aims at solving the problems that an existing hydraulic device is unbalanced in load in use, a plunger is bent, and normal use is affected. Comprising a frame body; the hydraulic device is fixedly connected to the frame body, and the hydraulic device is provided with a telescopic end; the top seat is fixedly connected to the telescopic end of the hydraulic device and is in ball connection with a top plate, and spring telescopic rods are arranged in the circumferential direction of the top plate at intervals; the base is fixedly connected to the frame body, the base is in ball joint with a bottom plate, the bottom plate is used for containing a machined object, and when the telescopic end of the hydraulic device is subjected to unbalance loading, the bottom plate and the top plate are rotated to adjust the position of the machined object so as to adjust the stress direction of the telescopic end of the hydraulic device. The tool deflects when cutting a machined object, the top plate and the bottom plate rotate to adjust the position of the machined object, so that lateral force borne by the tool is relieved, and the situation that the telescopic end of the hydraulic device is bent and damaged due to long-term lateral force is avoided.
Owner:SHANDONG HONGKUO INTELLIGENT TECHNOLOGY CO LTD

A stent moving method based on visualization and adaptive technology

The present invention relates to the technical field of support frame shifting, and in particular to a support frame shifting method based on visualization and adaptive technology, including calculating the angle between the push cylinder and the scraper according to the collected image, judging the verticality of the push cylinder and the scraper; calculating the support center distance between the hydraulic supports, evaluating the distance between the hydraulic supports; judging the degree of crushing of the top plate, and taking corresponding measures when the hydraulic supports are moved according to the degree of crushing; detecting and calculating the height of the column and the speed of the column during the column lifting process; adaptively adjusting the frame shifting parameters according to different target parameters and environmental changes, and adjusting the speed, stroke and supporting force of the frame shifting accordingly. The present invention uses visualization and adaptive technology for the hydraulic support to achieve precise adjustment and control of the posture of the hydraulic support during the frame shifting process.
Owner:ZHEJIANG ZHONGMEI HYDRAULIC MACHINERY

Wheel tread structure suitable for UIC60 rail, wheel, steering system and vehicle

The invention provides a wheel tread structure suitable for a UIC60 rail, a wheel, a steering system and a vehicle, the wheel tread structure comprises a rim area, a high-taper area, a constant working area, a low-taper area and a chamfer area, all the areas are continuously and smoothly connected in a tangent mode, opposite arc-shaped surfaces are arranged between the rim area and the high-taper area, and the arc-shaped surfaces are arranged between the rim area and the high-taper area. A wheel rolling circle position is arranged in the normal working area, and a horizontal straight line penetrating through the rolling circle position is a tread horizontal datum line; the wheel flange area comprises at least two arc-shaped sections and two linear sections, the arc-shaped sections and the linear sections are connected end to end and are continuously and smoothly connected in a tangent mode, and the arc-shaped sections are bent in the same direction. The wheel tread structure can meet the line conditions that the inner side distance of a vehicle wheel pair is 1353 mm, the gauge is 1435 mm, the rail cant is 1: 20 and the UIC60 rail, wheel rails can have a good contact relation, wheel rail contact points are reasonably distributed, it is guaranteed that the wheels and the steel rails are evenly abraded, and the contact points are distributed dispersedly in the range of a high contact stress area.
Owner:CRRC DALIAN CO LTD

Support moving method based on visualization and adaptive technology

The invention relates to the technical field of support moving, in particular to a support moving method based on visualization and self-adaption technology, which comprises the following steps: calculating the angle between a pushing oil cylinder and a scraper according to a collected image, and judging the perpendicularity between the pushing oil cylinder and the scraper; the support center distance between the hydraulic supports is calculated, and the distance between the hydraulic supports is evaluated; the crushing degree of the top plate is judged, and corresponding measures are taken when the hydraulic support moves according to the crushing degree; detecting and calculating the height and the column lifting speed of the stand column in the column lifting process; and frame moving parameters are automatically adjusted in a self-adaptive mode according to different target parameters and environment changes, and the frame moving speed, stroke and supporting force are correspondingly adjusted. Visualization and self-adaption technologies are adopted for the hydraulic support, and accurate adjustment and control over the posture in the hydraulic support moving process are achieved.
Owner:ZHEJIANG ZHONGMEI HYDRAULIC MACHINERY

Split type piston connecting rod structure and inflation assembly

The utility model relates to a split type piston connecting rod structure and an inflation assembly, the piston connecting rod structure comprises a piston, the piston is in a cylinder shape with openings at two ends, a first piston ring is sleeved on the outer side of the piston, and a second piston ring is sleeved on the outer side of the piston; the piston is provided with a pin hole which penetrates through the side wall of the first piston ring, and the axis of the pin hole is perpendicular to the axis of the piston. One end of the connecting rod is located in the piston, and the connecting rod is rotationally installed on the pin hole through a piston pin; the one-way valve is arranged at one end, far away from the connecting rod, of the piston; the split type piston connecting rod structure is of a split type structure, lateral stress is small, the swing angle is small, the service life is long, assembling is easy, the piston and the connecting rod are convenient to disassemble and assemble due to the split type structure of the piston and the connecting rod, the piston and the connecting rod can be replaced in time when one part is damaged, and maintenance cost can be effectively reduced.
Owner:WUHAN PUCHANG INTELLIGENT TECH CO LTD

Swash plate plunger pump

The invention relates to the technical field of hydraulic power elements, in particular to a rotating and tilting tray type plunger pump which comprises a floating disc assembly, a plunger assembly, a cylinder body, a center rod assembly, a pump body, a pump cover and a flow distribution device. The floating disc assembly, the plunger assembly, the cylinder body and the center rod assembly are arranged in a containing cavity formed by connecting the pump body and the pump cover, the main shaft swash plate assembly is provided with a driving shaft end, the driving shaft end penetrates through a side hole in the end of the pump body to be exposed, the main shaft swash plate assembly is provided with an inclined plane and is matched with the floating disc assembly to restrain the plunger assembly, and the cylinder body is fixed to the pump cover. The plunger assemblies are arranged in plunger holes evenly distributed in the circumference of the cylinder body, and flow distribution devices are arranged between the plunger holes and the oil suction port and between the plunger holes and the pressure port.
Owner:TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY

Low-noise crankcase design method

The invention belongs to the technical field of crankcase design, and particularly relates to a low-noise crankcase design method. A low-noise crankcase design method comprises the following steps that S1, after an initialized crankcase is obtained, external noise simulation is conducted on the initialized crankcase in a working condition environment, and external noise parameters on the initialized crankcase are collected; and S2, after optimal values of a plurality of specification parameters in the initialized crankcase are calculated according to the external noise parameters, the corresponding specification parameters of the initialized crankcase are adjusted, and a finished crankcase is obtained. According to the finished crankcase obtained through the design method, noise generated by the crankcase part can be greatly reduced without increasing the thickness of the crankcase body, and noise transmitted by the crankcase part is reduced.
Owner:HEFEI GENERAL MACHINERY RES INST +1

Intelligent mobile phone camera lifting screw

The utility model discloses a smart phone camera lifting screw, which comprises a first body, a second body, a first thread, a second thread and a third thread, the first body is transversely arranged, and the second body is in the same shape as the first body and is attached to the periphery of the middle of the first body. The first thread, the second thread and the third thread have the same thread shape and are attached to the periphery of the second body at intervals in a matched mode from left to right, and spiral threads with the same thread pitch and the same spiral angle are formed. The lifting device is simple in overall structure, precise in thread design, capable of ascending and descending quickly and stable in operation.
Owner:DONGGUAN TAICHEN METAL TECH CO LTD

A hobbing cutter barrel, a cutting cutter head and a boom-type tunneling machine

The present application belongs to the technical field of tunneling equipment, and specifically discloses a cutter drum, a cutting cutter head and a cantilevered tunneling machine. The cutter drum comprises a drum body, the drum body is provided with a mounting position for mounting a cutter, the drum body has a rotation axis, the cutter has a rotation axis, the mounting position has an axis that is positioned and coincides with the rotation axis of the cutter, and the rotation axis of the drum body is perpendicular to the axis of the mounting position. The cutting cutter head comprises the above cutter drum. The cantilevered tunneling machine comprises the above cutting cutter head. In actual application, when the cutting cutter head swings with the cutting boom, the cutter is subjected to a lateral force, the cutter drum rotates, thereby buffering the lateral force received by the cutter head, and avoiding the collapse and fracture of the cutter.
Owner:CHINA RAILWAY ENGINEERING EQUIPMENT GROUP TUNNEL EQUIPMENT MANUFACTURING CO LTD

Medicament distribution valve and distribution method thereof

The invention discloses a medicament dispensing valve and a dispensing method thereof. According to the pre-tightening structure, the pre-tightening bolt and the frame form a screw pair, the pre-tightening bolt and the second pre-tightening block form a rotating pair, the second pre-tightening block and the frame form a sliding pair parallel to the pre-tightening bolt, the first pre-tightening block and the frame form a sliding pair in the vertical direction, and the inclined face of the lower end of the second pre-tightening block is attached to the inclined face of the upper end of the first pre-tightening block to form a sliding friction pair. A cantilever in the displacement amplification mechanism is connected with a frame through a flexible hinge, the upper end of a piezoelectric stack is detachably fixed to a first pre-tightening block, and a first ball head integrally formed at the lower end of the piezoelectric stack is embedded into a hemispherical groove formed in the end, close to the flexible hinge, of the cantilever. In the nozzle assembly structure, a second ball integrally formed at the upper end of a valve rod and a stepped hole formed in the end, away from a flexible hinge, of a cantilever form a ball hinge. The device has better medicament distribution consistency, and can realize accurate adjustment of the output displacement of the valve rod when the medicament viscosity is different or the medicament drop volume distributed at a single time is different.
Owner:ZHEJIANG SCI-TECH UNIV