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884 results about "Resistance force" patented technology
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In physics, resistance force is the force which an effort force must overcome in order to do work on an object via a simple machine. Resistance force, like most other forces, is measured in newtons or in pounds-force. For an ideal mechanism in which no energy is lost, resistance force obeys the relation: where: R equals resistance force DR equals resistance distance E equals effort force DE equals effort distance Resistance force is used to calculate the work output using the following equation:
Sand gravel stratum jacking pipe jacking force-stratum resistance real-time matching control method
The invention discloses a sand gravel stratum pipe jacking force-stratum resistance real-time matching control method, belongs to the technical field of underground engineering pipe jacking construction, and solves the technical problems of pipe clamping, ground upheaval or settlement easily caused by mismatching of jacking force and stratum resistance in a sand gravel stratum. According to the method, the jacking force is calculated by collecting the pressure of a jacking oil cylinder in real time, the torque of a cutter head, the rotating speed of a spiral conveyor and the soil outlet pressure are synchronously obtained, and a resistance sudden change area is recognized and target resistance is dynamically predicted based on the sudden change gradient of the torque-rotating speed ratio; the jacking speed, the grouting pressure and the rotating speed of the spiral conveyor are adjusted in a linkage mode according to the real-time deviation of the jacking force and the target resistance; and through grouting closed-loop control and unearthed pressure fluctuation analysis, a penetration abnormal area is judged, a penetration coefficient is corrected, and real-time dynamic matching of jacking system parameters and formation resistance is achieved. The method is mainly used for safe and efficient propulsion control of sand gravel stratum pipe jacking construction.
Owner:中电建路桥集团有限公司
Vehicle brake pedal with linear pedal resistance and dampener assembly and force / position sensor
ActiveUS12296811B2Controlling membersLimiting/preventing/returning movement of partsControl theoryForce sensor
A vehicle pedal resistance and dampener assembly includes a dampener module defining an interior fluid-filled cavity and adapted for generating a dampening force on the vehicle pedal. A pedal resistance module generates a resistance force on the vehicle pedal. The dampener module and the resistance module are moveable relative to each other. A shaft in the dampener module extends into and is moveable in a fluid-filled sleeve in the resistance module. A pedal position sensor senses and measures the position of the vehicle pedal. A pedal force sensor senses and measures the force on the vehicle pedal. A first resistance spring is located in the sleeve of the pedal resistance module, a second resistance spring surrounds the sleeve of the pedal resistance module, a third resistance spring surrounds the shaft of the dampener module, and a fourth resistance spring surrounds the third resistance spring.
Owner:CTS CORP
Resistance training machine and methods of use
A resistance training machine, a method of providing custom workouts, and a method of providing feedback on user form and user balance are disclosed. The resistance training machine includes a left and right motor, a left and right pulley system, a left and right cable, a machine controller, and a human machine interface. Advantageously, the resistance training machine can provide isotonic exercises, isokinetic exercises, and feedback on form and balance for a user. The first method includes a user calibrating one or more exercises, selecting an exercise, selecting an exercise mode, and performing the exercise. For each exercise, a motor may ramp up to and ramp down from a selected velocity or force level.
Owner:SPEEDE FITNESS LLC
Tunneling parameter adjusting method and system of shield tunneling machine
The invention relates to a shield tunneling machine tunneling parameter adjusting method and system, and relates to the technical field of shield construction, and the method comprises the steps: recording propulsion resistance information in a plurality of past historical moments, obtaining a historical propulsion resistance sequence, carrying out the prediction of propulsion resistance at a plurality of future moments, and obtaining a predicted propulsion resistance sequence; optimizing the propulsive force of the shield tunneling machine in order to improve the propulsive speed and the soil layer stability to obtain optimized propulsive force; carrying out fluctuation analysis on the historical propulsion resistance sequence and the predicted propulsion resistance sequence, calculating to obtain minimum fluctuation propulsion resistance and maximum fluctuation propulsion resistance, respectively carrying out propulsion speed analysis and soil layer stability analysis to obtain minimum propulsion speed and minimum soil layer stability information, and carrying out auxiliary optimization on the optimized propulsion force to obtain the optimal propulsion force. And optimal propulsive force is obtained, and tunneling parameters of the shield tunneling machine are adjusted. The technical effect of improving the shield construction efficiency, stability and safety is achieved.
Owner:GUANGDONG UNIV OF TECH
Method, system and equipment for analyzing tripping-in capacity of well completion pipe string
PendingCN119337075ADesign optimisation/simulationSpecial data processing applicationsFriction torqueFrictional coefficient
The invention discloses a well completion pipe string tripping-in capacity analysis method, system and equipment, and belongs to the technical field of oil and gas engineering.The method includes the steps that a friction torque mechanical theoretical model is adopted, and a full-shaft equivalent friction coefficient is obtained through fitting of measured data in the simulated drifting stage; according to the equivalent friction coefficient obtained through fitting, the deformation state of the open hole segmented well completion pipe string is calculated and analyzed, and therefore it is ensured that the well completion pipe string can be safely tripped in; meanwhile, different encountering resistances are arranged in a distributed mode, the deformation state of the pipe column in the tripping-in process of the well completion pipe column is calculated and analyzed, the critical encountering resistance is determined according to the deformation state of the pipe column, a more objective and reliable encountering resistance value is provided for control over the tripping-in process of the pipe column, the tripping-in safety of the pipe column is improved, and meanwhile the construction efficiency is improved.
Owner:PETROCHINA CO LTD
Intermittent spiral heading machine and control method
The invention provides an intermittent spiral heading machine and a control method, and relates to the technical field of engineering machinery. According to the method, the tunneling parameters serve as feedback, PI calculation is conducted on the control parameters, the initial control parameters of the next period are obtained, influences of formation resistance, rotation torque and the vibration condition are considered, and the initial control parameters are made to adapt to the actual condition of the current tunneling face. Afterwards, the initial control parameters are optimized through the preset optimization model, and the preset optimization model is obtained by training on the basis of the tunneling parameters and the control parameters in the historical period, so that the actual regulation and control condition in the tunneling process in the historical period is fully considered; therefore, the target control parameters better conform to the actual situation of the current tunneling face, the regulation and control precision of the spiral tunneling machine is improved, high-precision control over the spiral tunneling machine is achieved, the problems of drill bit deviation and unstable torque are solved, and the tunneling efficiency of the spiral tunneling machine is improved.
Owner:POWERCHINA WATER ENVIRONMENT GOVERANCE
Hybrid power fitness equipment
The invention provides hybrid power fitness equipment. The hybrid power fitness equipment comprises a tension assembly; the driving motor and the resistance device are matched through a one-way bearing; the tension assembly is in transmission connection with the one-way bearing through the transmission assembly, when the tension assembly is in a first resistance training state, the resistance device and the driving motor are in transmission connection with the one-way bearing, and the resistance device provides resistance for tension resistance; when the tension assembly is in the second resistance training state, the resistance device and the driving motor are in transmission connection with the one-way bearing, and the resistance device and the driving motor jointly provide resistance for the tension assembly; when the tension assembly is in a tension recovery state, the driving motor is connected with the one-way bearing to provide recovery force for the tension assembly, and the recovery force and resistance are provided on the premise of low-cost improvement by using the resistance device and the driving motor at the same time. The contradiction between the one-way resistance experience bottleneck of a resistance training assembly in the prior art and the cost of traditional two-way force equipment is solved.
Owner:POKANG TECH CO LTD
Extra-large bridge construction displacement measuring device
PendingCN119268559Areduce resistanceHigh precisionUsing optical meansMechanical measuring arrangementsMeasurement deviceFixed frame
The invention relates to the technical field of bridge displacement measurement, in particular to an extra-large bridge construction displacement measuring device which comprises a bridge pier, a bridge is arranged on the top face of the bridge pier, a supporting structure is installed on the outer side of the bridge pier and comprises a fixing frame, and the fixing frame is arranged on the outer side of the bridge pier in a sleeving mode. A driving roller is installed on the inner side of the fixing frame, and the fixing frame is in threaded connection with a first bolt and a second bolt. According to the measuring device, the limiting disc at the upper end of the fixed column is arranged in the movable cavity in the bottom surface of the mounting plate, so that the fixed column is movably connected with the mounting plate, the resistance of the device to bridge displacement can be reduced, the limiting disc is located in the middle of the inner side of the movable cavity, and a distance exists between the edge of the limiting disc and the inner wall of the movable cavity; the limiting disc can move in any direction in the movable cavity, so that the displacement distance and direction of the bridge on the pier can be measured, and the detection accuracy and range can be improved.
Owner:ROAD & BRIDGE INT CO LTD +1
Resistance identification method and device for hydraulic support
PendingCN119666213Aaccurate identificationimprove securityMine roof supportsApparatus for force/torque/work measurementControl engineeringProcess engineering
Owner:HUATING COAL GRP CO LTD +2
Grinding device and grinding method for inner curved surface of steel casting
The invention discloses a polishing device and a polishing method for an inner curved surface of a steel casting, and relates to the technical field of cast steel production. The device comprises a main body frame and a polishing device, wherein the main body frame comprises a mounting table arranged on the main body frame; the stirring mechanism comprises a plurality of profiling plates which are mounted on the mounting table and used for stirring abrasive particle flow in the casting blank, and a plurality of rotating wheels are rotationally mounted on the inner wall of each profiling plate; the back pressure mechanism is used for driving the profiling plate to enter the casting blank; the rotating wheel is driven to rotate through resistance of abrasive particle flow, so that the abrasive particle flow completes switching between the distance from the abrasive particle flow to the central axis of the casting blank, and meanwhile, in the revolution process of the profiling plate, the abrasive particle flow in the casting blank is extruded up and down in a reciprocating mode through the action of a reciprocating mechanism; and the abrasive particle flow circularly polishes the inner wall of the casting blank up and down, so that the purposes of fully switching and contacting the abrasive particle flow and the inner wall of the casting blank, ensuring the polishing quality and improving the polishing efficiency are achieved.
Owner:JIANGSU WANLIU MASCH MFG CO LTD
Pressing wheel mechanism facilitating distance control
The utility model relates to the technical field of pipe pile forming machines, in particular to a pinch roller mechanism convenient for distance control, and aims to solve the technical problems that in the prior art, the rotating resistance of a pipe die is large, and heat is easily accumulated on the surface of a pinch roller, the pinch roller mechanism specifically comprises a box body, and an inner cavity is formed in the box body; the rotating seat is fixedly arranged on the side plate of the box body; one end of the swing arm is rotationally connected with the rotating seat through a rotating shaft; the pressing wheel is arranged at the other end of the swing arm and is rotationally connected with the swing arm through a wheel shaft; the driving mechanism is arranged in the inner cavity and can drive the swing arm to swing up and down around the rotating seat; the driving mechanism comprises a movable arm, one end of the movable arm penetrates through a through opening formed in a side plate of the box body and is fixedly connected with the near end of a swing arm into a whole; by arranging the limiting device matched with the jacking device, accurate adjustment of the distance between the pressing wheel and the pipe die is achieved, the problems that due to the fact that a distance control mechanism is lacked in a traditional pressing wheel mechanism, continuous pressing fit between the pressing wheel and the pipe die is caused, and resistance is increased are solved, and the heat accumulation phenomenon of the wheel face of the pressing wheel is reduced.
Owner:CCCC THIRD HARBOR ENGINEERING CO LTD
Self-propelling complex drill bit drilling control method and system
The invention provides a drilling control method and system for a self-propelled complex drill bit, and the method comprises the steps: setting a rated cutting torque through obtaining roadbed soil, hydraulic power and geometric parameters, calculating the total propulsion resistance based on the roadbed strength to control the axial jacking force, and carrying out the safety verification of the drag force; calculating a critical flow velocity according to the characteristics of the drilling slag to adjust the discharge capacity and negative pressure of the slurry pump so as to determine an operation boundary; drilling and deslagging are cooperatively executed under the boundary, and the trajectory is corrected by combining a PID algorithm and the propulsion speed is optimized based on the theoretical mechanical drilling speed. According to the method, the technical problems that existing trenchless construction depends on experience to set parameters, scientific quantitative calculation of the slag discharge flow speed and the safety drag force is lacked, and then pipe cable blockage and drainage pipe damage are caused can be solved, and full-system cooperative efficient control of drilling, propelling, slag discharge and guiding based on multi-field coupling calculation is achieved.
Owner:CHINA MERCHANTS CHONGQING COMM RES & DESIGN INST
Damping device
InactiveCN222541712Uincrease stiffnessProtective buildings/sheltersBuilding material handlingEngineering structuresStructural system
The utility model relates to the technical field of energy dissipation and shock absorption of engineering structures, in particular to a damping device which comprises a bearing mechanism, an upper cover plate and a lower cover plate with the same size specification as the upper cover plate. The movable mechanism comprises a fixed plate arranged between the upper cover plate and the lower cover plate, and a friction plate also arranged between the upper cover plate and the lower cover plate; the fastening mechanism comprises a plurality of fastening bolts arranged on the upper cover plate and a plurality of nuts matched with the fastening bolts; according to the utility model, different SMA wire bundle quantity ratios can be matched by controlling the pre-tightening force of the bolt and the sliding resistance, so that the maximum energy-dissipating capacity can be fully exerted on the basis of ensuring that a structural system has the self-resetting capacity, the sliding resistance can be adjusted, and the self-resetting force of the structural system can be adjusted. The hysteresis curve is not rectangular any more, the rigidity of the structure is effectively improved, and the situation that the energy consumption form is single is avoided.
Owner:TONGJI UNIV
Spinning bike based on novel magnetic force
The utility model discloses a spinning based on novel magnetic force, which belongs to the technical field of sports equipment and comprises a body, a magnetic powder brake, a fixing component, a pedal component and a control component, the body is connected with the fixing component, the fixing component is connected with the magnetic powder brake, and the pedal component is connected with the fixing component. The magnetic powder brake and the vehicle body are both connected with the control assembly. Through the mode, the battery of the control assembly supplies power to the magnetic powder tension controller, the magnetic powder tension controller controls the magnetic powder brake to operate, the output end of the magnetic powder brake controls the middle shaft to brake, and the middle shaft controls the right crank and the left crank to rotate, so that the resistance is adjusted, and the movement difficulty and strength are changed; in the using process, the defects of belt slipping, low resistance efficiency, noise, belt falling and the like are overcome, and the situation that leg muscles are strained due to the fact that an operator suddenly stops moving or the speed of the operator cannot follow the inertia speed in the moving process is avoided.
Owner:南通华隆机械制造有限公司
Method and device for calculating resistance coefficient of porous medium, medium and equipment
ActiveCN121787308ASustainable transportationDesign optimisation/simulationPorous mediumViscous resistance
The invention discloses a resistance coefficient calculation method and device of a porous medium, the medium and equipment. The method comprises the steps that a three-dimensional geometric model of target equipment is constructed, a simulation area of the porous medium in the three-dimensional geometric model is determined, a simulation experiment is conducted on the target equipment, and an inlet and outlet experiment pressure difference is obtained; constructing an optimization model based on an inlet and outlet experiment pressure difference and an inlet and outlet simulation pressure difference, wherein the inlet and outlet simulation pressure difference is obtained by performing fluid simulation calculation on a three-dimensional geometric model based on a CFD control equation, a continuity equation, a CFD momentum conservation equation, a viscous resistance coefficient and an inertial resistance coefficient of a simulation area; taking the optimization model as a target function in a population algorithm, wherein position variables corresponding to individuals in the population algorithm are a multidirectional viscous resistance coefficient and a multidirectional inertial resistance coefficient; and solving the optimization model based on a population algorithm to obtain an optimal viscous resistance coefficient and an optimal inertial resistance coefficient. The identification accuracy of the inertial resistance coefficient and the viscous resistance coefficient is improved.
Owner:BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
Device and method for detecting tensile strength of steel wire rope of elevator
The invention relates to the technical field of steel wire rope detection, and discloses an elevator steel wire rope tensile strength detection device and method.The elevator steel wire rope tensile strength detection device comprises a machine base, a detection frame arranged on the machine base, a control case and a lifting assembly arranged on the detection frame; the lifting assembly comprises a lifting seat, and clamping assemblies for clamping and fixing the steel wire rope are arranged on the upper side of the lifting seat and the detection frame. According to the elevator steel wire rope tensile strength detection device, through the cooperation between the protection assembly and the buffer assembly, damping liquid in the buffer part is extruded by the buffer plate and flows through the through holes, the viscous resistance of the damping liquid is used for attenuating the kinetic energy of a moving machine, and the effect of buffering force unloading is achieved; the flow rate of the damping liquid can be further slowed down through the retention hole in the through hole, the buffering and damping effect is enhanced, the counter-acting force generated when the steel wire rope is broken can be effectively attenuated through the arrangement, and the mechanical structure of the detection equipment is protected against damage.
Owner:TIANJIN HUAYUAN TIANLUN ROPE IND
Systems and methods for verifying train controllers
PendingUS20240416981A1Hardware monitoringRailway traffic control systemsFreight trainsControl engineering
Disclosed herein is a system and method for formally verifying the safety of the Federal Railroad Administration freight train kinematics model with all its relevant forces and parameters, including track slope and curvature, airbrake propagation, and resistive forces as computed by the Davis equation.
Owner:CARNEGIE MELLON UNIV
High dynamic response electromagnetic damping system
ActiveCN120626660AVibration dampersMagnetic springsElectrical resistance and conductanceElectric machine
The invention discloses a high dynamic response electromagnetic damping system, and relates to the technical field of dampers. Through cooperation of the sealing driving electromagnet and the resettable tension spring, instantaneous opening and closing of the circulation path of the inner cylinder and the outer cylinder are achieved; the two working modes of gear damping and stepless damping are switched, only the electromagnet needs to be cut off or excited, a valve element does not need to be mechanically inserted and pulled, the dynamic response time can be compressed to the millisecond level, and the high-frequency vibration suppression capacity and the system reliability are greatly improved; a blade-worm gear-motor closed-loop servo structure is adopted, a force sensitive resistor senses the direction and the size of oil flow in real time, and the rotating speed of the blade can be continuously adjusted within the resistance coefficient of 0-100% through a control algorithm; compared with a magnetorheological fluid type scheme depending on magnetic induction shearing, the problems of temperature drift and ferromagnetic particle deposition are solved, and the damping linearity and repeatability are ensured.
Owner:QINHUANGDAO DAZE ELECTROMECHANICAL EQUIP CO LTD
Portable gradienter device
ActiveCN222188335Uavoid collisionAvoid measurement effectsIncline measurementMagnetic tension forceMagnet
The utility model relates to the technical field of gradienters, and discloses a portable gradienter device which comprises a rectangular frame, a first bubble tube and a permanent magnet, V-shaped grooves are formed in three side walls of the rectangular frame, reinforcing rib plates are arranged on the inner wall of the rectangular frame, and a fixing plate is arranged on the inner wall of one side, close to the permanent magnet, of the rectangular frame. The portable gradienter device comprises a rectangular frame, a permanent magnet and a fixing plate, a guide rod is movably connected into the fixing plate, a buffer plate is arranged at one end of the guide rod, and a reset spring is arranged between the buffer plate and the fixing plate. The resistance effect is generated on the magnetic force of the permanent magnet and the force applied by personnel through the elastic force of the reset spring, and the situation that the gradienter is directly attracted to a workpiece under the magnetic force effect to cause collision is avoided; meanwhile, the buffer plate is pulled backwards, so that the influence of the buffer device on measurement in the testing process of the gradienter is avoided, and the measurement accuracy of the gradienter is ensured.
Owner:AILI TECH (GUANGZHOU) CO LTD
Stretching linkage equipment and tensioner
The stretching linkage equipment comprises a traction machine and the tension machine, the traction machine comprises a traction machine frame, a traction winding drum and a guide mechanism, the traction winding drum is installed on the traction machine frame, and the guide mechanism is arranged on the traction machine frame; the tension machine comprises a tension machine frame, an output shaft and a tension winding drum, the tension winding drum is rotationally arranged on the tension machine frame, and the output shaft is fixedly connected to the tension winding drum; a hydraulic resistance braking mechanism is fixedly arranged on the tension rack, and the hydraulic resistance braking mechanism is arranged on the output shaft in a sleeving manner; the tension machine further comprises a gear motor, and the gear motor is arranged on the tension machine frame. The hydraulic resistance braking mechanism comprises a liquid disc, a closed liquid cavity filled with magnetorheological fluid is arranged in the liquid disc, a resistance wheel set is arranged in the liquid cavity, and the resistance wheel set comprises a rotatable resistance blade and a motor; and a magnetic field regulation and control mechanism is arranged outside the liquid disc. The technical problem that hydraulic braking of existing stretching equipment fails is solved by integrating the hydraulic resistance braking mechanism and the magnetic domain regulation and control mechanism through the tensioner.
Owner:XIANGYANG POWER SUPPLY COMPANY OF STATE GRID HUBEI ELECTRIC POWER
Friction plate modeling method of brake system and related device
PendingCN119670255ASimulation is accurateGeometric CADSustainable transportationVehicle dynamicsBrake torque
The invention discloses a friction plate modeling method of a braking system and a related device, and relates to the technical field of vehicle dynamics, the first braking state of the braking system at the current moment is determined; and under the condition that the first braking state is the locked state, based on the assumption that the connection relation is the spring damping system, the first friction torque between the friction plate model and the wheel model is calculated, and the first friction torque is the first braking torque of the braking system in the locked state. When the wheel is locked, the static friction force of the friction plate is approximately equal to the rolling resistance of the wheel, and the friction plate and the wheel are not absolutely rigid, so that the friction plate slightly deforms under stress, and the static friction force of the friction plate fluctuates up and down under the resistance of the wheel but does not suddenly change; according to the application, during modeling, a spring damping system is used between the friction plate model and the wheel model to achieve a similar effect, so that the brake torque under a vehicle locking state can be accurately simulated, and great help can be provided for a brake control system algorithm simulation test.
Owner:BEIJING JINGWEI HIRAIN TECH CO INC
Intelligent hardware grinding device and grinding process thereof
The invention relates to the related technical field of grinding machinery, discloses an intelligent hardware grinding device and a grinding process thereof, and aims to solve the problem that effective grinding cannot be performed due to the fact that a protrusion defect is located between a steel part and a grinding seat. When the driving motor drives the steel part, the output torque can be limited through the first torque limiting base and the right connecting base, and when the protruding defect of the steel part moves to the position of the grinding wheel, the rotating resistance of the steel part is increased through blocking of the grinding wheel on the protruding defect. And power weakening of the driving motor is achieved through the first torque limiting base and the right connecting base, in the process, the steel piece drives the protrusion to still have the rotating tendency, the grinding motor drives the grinding wheel to continuously grind the defect of the protrusion, and after the defect of the outer side of the steel piece is completely ground, the steel piece and the grinding wheel recover relative same-direction rotation again.
Owner:ZHANGJIAGANG DONGKAI HARDWARE TOOLS CO LTD
Surface polishing treatment device for bearing machining
The invention relates to the technical field of bearing machining, and discloses a surface polishing treatment device for bearing machining, which comprises a bottom plate, a base, a machine body, a supporting rod, a main shaft mechanism, a cantilever rod and a stable supporting mechanism, and is characterized in that a piezoelectric actuating mechanism is arranged, and a piezoelectric sensing element is embedded in a high-speed rotating grinding wheel; friction resistance in the horizontal direction and vibration impact force borne by the grinding wheel in the cutting process are captured in real time, physical signals are transmitted to the piezoelectric sensor fixed to the workpiece bracket, the distance between a signal source and a force bearing point is shortened through built-in sensing, signal attenuation caused by long-distance transmission is avoided, and the machining precision of the grinding wheel is improved. Instantaneous impact and initial displacement of vibration are accurately captured, a physical basis is provided for closed-loop control, a displacement amplification mechanism and a first-stage bearing mechanism are arranged, a lever group converts infinitesimal displacement of an actuator into large-amplitude displacement, meanwhile, a spring buffers high-frequency impact, in the first-stage bearing mechanism, a gear plate drives a coaxial gear set, and in the second-stage bearing mechanism, the gear plate drives the coaxial gear set; and the horizontal displacement is converted into vertical lifting force.
Owner:JIANGSU GUOWEI ENG MACHINERY CO LTD
Lowering assist device
Owner:ROCKING INC
Resistance output module and fitness equipment
The utility model discloses a resistance output module and fitness equipment, and the resistance output module comprises a rack; the load assembly is connected to the rack, and the load assembly comprises a load motor and a transmission chain; the output assembly is connected to the rack, the output assembly comprises a connecting part, a connecting rope and a stretching part which are connected in sequence, and the connecting part is fixed to one side of the transmission chain; wherein the load motor can output load force, the stretching part is suitable for moving outwards so as to drive the load motor to rotate through the transmission chain, and the load motor is in transmission connection with the transmission chain and used for driving the transmission chain to reset. The output assembly is fixed to the transmission chain, so that a player can directly pull the stretching component to train, the structure of a transmission system is greatly simplified, use of complex components such as a traditional speed reducer and a traditional differential mechanism is reduced, and the problem that a traditional rope is prone to being folded and wound when being repeatedly wound and released on a winding wheel is thoroughly solved; and smoothness and stability of power output are ensured.
Owner:SHENZHEN OXYGEN SPORTS TECHNOLOGY CO LTD
Resistance pulley structure, rowing machine, and rowing high-position pull-down integrated machine
A resistance pulley structure includes a symmetrical stay cord assembly, a transmission assembly, a resistance assembly and driving parts. The stay cord assembly includes a stay cord, a first and a second fixed pulley block and a movable pulley block. The movable pulley block includes a left and right movable pulleys, and the second fixed pulley block includes a second left fixed pulley and a second right fixed pulley. The rotation direction of the second fixed pulley block is parallel to the rotation direction of the first fixed pulley. After the stay cord bypasses the first fixed pulley, two ends bypass the left and right movable pulley respectively, then bypass the second left fixed pulley and the second right fixed pulley respectively, and connected to the driving parts.
Owner:SUNNY DISTRIBUTOR INC
Method for preventing slab from being frozen after breakout of continuous casting machine
A method for preventing a slab from being frozen after breakout of a continuous casting machine. The method comprises: providing a breakout button, and forcibly executing breakout control; and respectively improving control over the position of a fan-shaped section (2), control over the drawing speed, control over a cooling loop of secondary cooling water, control over the opening of holding rollers, and control over a target force of the holding rollers. By increasing an opening value of the fan-shaped section, the volume in a tail slab is increased, the problem of steel overflow is solved, and the slab drawing resistance is reduced by 20-40%; by controlling the slab drawing speed and the flow of secondary cooling water, the cooling strength for the slab and a breakout point is increased by 30-50%; by controlling automatic opening of the holding rollers to prevent an excessive holding force from squeezing the slab, the majority of molten steel overflows can be reduced; and by increasing the target force of the holding rollers and increasing friction force between the rollers and the slab, a guarantee is provided for drawing out the slab, and the time taken for urgent repair of an apparatus after breakout is reduced, thereby saving on costs and increasing the operation rate of a casting machine.
Owner:BENGANG STEEL PLATES CO LTD
Extreme sinking depth calculation method in shaft sinking construction
The invention discloses a method for calculating the limit sinking depth in vertical shaft sinking construction, and the method comprises the steps: S1, building a construction mechanical model in a vertical shaft lifting and controlling sinking process, and obtaining an analysis equation; s2, converting the analysis equation according to the value of the blade foot end resistance Rj; s3, calculating a vertical suspension force T; and S4, calculating the limit sinking depth Hmax of the vertical shaft. The method has the advantages that the analysis equation is obtained by building the construction mechanical model in the shaft lifting and controlling sinking process, the limit sinking depth Hmax of the shaft is finally obtained by calculating the vertical suspension force T, and reference is provided for open caisson parameter design.
Owner:CHINA RAILWAY 15TH BUREAU GROUP CORPORATION LIMITED +1
Electric cylinder lead screw
The utility model relates to the technical field of lead screws, in particular to an electric cylinder lead screw which comprises a lead screw body, a nut, a ball and a reverser, the lead screw body is of a song type double-arc structure, the ball holding point of the ball is raised, and the rigidity of the lead screw body is improved. The ball rolls between the lead screw and the nut when the lead screw rotates, the nut drives the nut to linearly move on the lead screw under rolling of the ball, rolling friction resistance between the ball and the nut is very small, movement is more stable, the reverser can be connected with the two ends of ball circulation, each circulation loop is closed circulation, and therefore the service life of the lead screw is prolonged. According to the ball screw nut, the ball does infinite circulation motion between the screw rod and the nut, the reverser is used for designing adjacent columns on the nut into channels capable of being circulated through curve adjustment, the number of circles of the ball which can be used in unit length is increased, the rigidity of the nut in unit length is greatly improved, and the characteristic of rigidity is exerted to the maximum extent by increasing the number of load circles.
Owner:CHANGZHOU FULIKANG PRECISION MACHINERY
Four-arm-arm multi-track strength training device
The utility model discloses a four-force-arm multi-track strength training device which comprises a machine frame. The four adjusting assemblies are located on the same side of the rack and arranged on the periphery of the rack, each adjusting assembly comprises an adjusting base and an output rod, the adjusting bases are rotationally connected to the rack in the horizontal direction, and the output rods are rotationally connected to the adjusting bases in the vertical direction; the four stretching parts are connected with the adjusting assemblies in a one-to-one correspondence mode, each stretching part comprises a pulling block, the pulling blocks are connected to the outer side of the output rod, and the pulling blocks are suitable for being pulled outwards; and the resistance output module is connected to the rack, and the resistance output module is used for outputting load force to the pulling block. Two additional force arms and a flexible multi-angle adjusting mechanism are added, the types of training actions are greatly enriched, the adaptability and expansibility of the equipment are improved, a user can do diversified and personalized exercise according to different muscle groups, operation is easy, convenient and visual, the equipment is suitable for people of various body types and training levels, and the practicability is high. And the fitness experience and the training effect are obviously enhanced.
Owner:SHENZHEN OXYGEN SPORTS TECHNOLOGY CO LTD