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1083 results about "Force direction" patented technology
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Folding cart
ActiveUS12485944B2Hand carts with multiple axesHand cart accessoriesClassical mechanicsStructural engineering
A folding cart comprises a front frame, a rear frame, a side frame arranged between the front frame and the rear frame and used for expanding and folding, and a release mechanism used for restricting or releasing restriction on the folding of the side frame. A force direction applied to trigger the release mechanism is the same as that applied to fold the side frame, the side frame is driven to fold after the release mechanism releases the restriction on the folding of the side frame. In the folding cart, after an external force is applied to trigger the release mechanism to release the folding restriction, the external force in the same direction can be continuously applied to directly drive the side frame to fold. A user only needs to apply force in a single direction to complete dual tasks of unlocking and folding one after another.
Owner:ZHONGSHAN KANGLAIYA TRADE CO LTD
Man-machine interaction system and method for robot training and data acquisition
According to the man-machine interaction system and method for robot training and data acquisition, a main device instruction system captures an operator hand posture generation instruction through a wearable sensor of an action acquisition subsystem, and meanwhile, the direction and strength information of force is transmitted by means of an annular vibration motor array of a tactile feedback subsystem; the data processing system is responsible for converting the attitude instruction into a mechanical arm control signal and processing feedback force data; the slave equipment responds to a multi-degree-of-freedom mechanical arm execution instruction of the system, and a force sensor collects environment interaction force data and transmits the environment interaction force data back; a robot self-learning module trains a diffusion model by using synchronously acquired time-aligned vision, trajectory and force feedback multi-modal data sets, a tactile feedback subsystem realizes force information transmission through single-motor direction mapping and PWM wave adjustment, and the self-learning module adopts DDIM to accelerate reasoning to generate an action sequence. And the autonomous operation capability of the robot in a complex scene is improved.
Owner:TSINGHUA SHENZHEN INTERNATIONAL GRADUATE SCHOOL
Torsion bar elastic constraint spherical steel support
The invention discloses a torsion bar elastic constraint spherical steel support which comprises a longitudinal spherical steel support, the longitudinal spherical steel support comprises a fixed support bottom plate located at the bottom, a support bottom basin is arranged on the support bottom plate in a sliding mode, a torsion bar assembly for constraint and limitation is arranged on the support bottom plate, and the longitudinal spherical steel support comprises a longitudinal spherical steel support body. The torsion bar assemblies are arranged on the two opposite side faces of the support bottom basin. Horizontal movement of the pin shaft end of the torsion arm is restrained through the side plate slide way, rigid rotation of the torsion arm during movement of the support is achieved, and the torsion arm rotates to drive the torsion rod spring to twist; a connecting rod assembly is removed, so that the structure is more compact; and the direction of the external force is parallel to the axis of the fixing bolt, the bolt stress is optimized, and the bridge support is more suitable for the application scene of the bridge support.
Owner:CHINA RAILWAY DESIGN GRP CO LTD
Wafer bonding pressure control mechanism and method
The invention relates to the technical field of wafer bonding devices, in particular to a wafer bonding pressure control mechanism and method. The mechanism comprises a main driving unit and a bonding pressing rod linked with the main driving unit, the main driving unit drives the bonding pressing rod to move in the bonding pressure direction, bonding pressure is applied to a wafer through the bonding pressing rod, the bonding pressing rod is linked with the main driving unit through a pressure maintaining air cylinder, and the bonding pressing rod is arranged at the tail end of a piston rod of the pressure maintaining air cylinder; a displacement sensor is further included, the displacement change of the bonding pressing rod is detected through the displacement sensor, and the displacement sensor is electrically connected with the main driving unit. The main driving unit and the pressure maintaining air cylinder are combined to form a composite operation control system, the bonding pressure is controlled and adjusted by controlling the air pressure of the pressure maintaining air cylinder, and the stability of the bonding pressure is ensured.
Owner:DONGGUAN ATTACH POINT INTELLIGENT EQUIP CO LTD
Magnetic fastener and kettle device
ActiveCN119532288Aeasy to operateHumanized operationTravelling sacksSecuring devicesGrip forceGrip strength
The invention discloses a magnetic buckle and a kettle device, the kettle device comprises a kettle main body and the magnetic buckle, the magnetic buckle comprises a male buckle and a female buckle, a rotatable unlocking operation piece is arranged in the female buckle, and the male buckle and the female buckle can be driven to be disengaged through the unlocking operation piece; the female buckle can be fixedly arranged on the kettle body or detachably connected with the kettle body, and the male buckle is used for being fixed to a using place. According to the kettle device, hanging and dismounting of the kettle body are achieved through detachable connection of the male buckle and the female buckle, the force application direction of the unlocking operation is conducted in the direction away from the male buckle and is consistent with the gripping force direction when a user grips the kettle, and therefore unlocking can be conducted while the kettle is gripped, the action is completed at one time, and the user experience is improved. And the kettle main body can be taken down from a use place without excessive actions, so that the operation is very humanized, the practicability is very high, and the kettle is suitable for being vigorously popularized.
Owner:OSMARTRADING (SHENZHEN) CO LTD
Non-directional force sensor control method and system based on real-time force trend prediction
ActiveCN120620240AProgramme-controlled manipulatorBiological modelsProportional integral differentialDifferential coefficient
The embodiment of the invention provides a non-directional force sensor control method and system based on real-time force trend prediction, and the method comprises the steps: collecting a real-time force signal sequence generated when a target mechanical device carries out the contact operation, and inputting the real-time force signal sequence into a pre-trained force trend prediction model; and obtaining a force direction trend prediction result output by the force trend prediction model, generating a multi-dimensional force compensation signal according to the matching degree of the force direction trend prediction result and the current closed-loop control parameter, adjusting a proportion-integral-differential coefficient in the current closed-loop control parameter based on the multi-dimensional force compensation signal, generating an updated closed-loop control parameter, and outputting the updated closed-loop control parameter. The updated closed-loop control parameters are input into an actuator of the target mechanical device, and the contact operation track of the target mechanical device is dynamically adjusted through the actuator according to the updated closed-loop control parameters, so that the multi-dimensional force amplitude data output by the non-directional force sensor are converged to a preset force control target interval. The response speed and stability of the force control system can be improved.
Owner:BEIJING HANGXING TRANSMISSION TECH CO LTD
Flexible touch sensor capable of resolving power direction and preparation method thereof
The invention discloses a flexible touch sensor capable of distinguishing a force direction and a preparation method thereof. The sensor comprises a force loading layer, a force amplification block, a test electrode, a piezoresistive layer, a reference electrode and a substrate, the piezoresistive layer is of a micro-pyramid structure; the bottom surface of the force loading layer is fixedly connected with the force amplification block and the substrate respectively; the piezoresistive layer is cross-shaped and is arranged between the reference electrode and the test electrode; the test electrode is of a cross-shaped structure, and the tail part of each channel forms an electrode of the sensor; the piezoresistive layer is tightly attached to the reference electrode and the test electrode respectively; the force amplification blocks are distributed corresponding to the four channels of the test electrode; a wire hole is formed in the substrate, and a wire of the reference electrode penetrates out of the wire hole. According to the invention, high-sensitivity detection of shear forces and normal pressures in different directions is realized, and simultaneous detection of directions and magnitudes of forces is realized.
Owner:SICHUAN WINDOM PHOTOELECTRIC TECH
High-wind-resistance multi-rotor unmanned aerial vehicle
ActiveCN119683030AAircraft stabilisation by gravity apparatusVibration suppression adjustmentsUncrewed vehicleElectric machinery
The invention relates to the field of unmanned aerial vehicles, and discloses a high-wind-resistance multi-rotor unmanned aerial vehicle which comprises a vehicle body and vehicle arm supports arrayed on the side face of the vehicle body, a first motor is arranged at the tail end of each vehicle arm support, a propeller part is installed on an output shaft of each first motor, and the propeller parts are driven by steering engines to change the inclination angle; when the unmanned aerial vehicle encounters strong crosswind, the resistance of the unmanned aerial vehicle to the crosswind is improved by changing the rotation angles of the corresponding propellers and the propeller parts, so that the stability of the unmanned aerial vehicle encountering the strong crosswind in the flying process is improved, the thrust vector direction is changed, and the compensation force opposite to the wind pressure direction is generated. According to the dynamic adjustment mechanism, the unmanned aerial vehicle can keep the flight path stable under the strong crosswind condition, and the problem of flight path deviation caused by the fixed thrust direction of a traditional unmanned aerial vehicle is effectively avoided.
Owner:XIAMEN TIANYUAN OURUI TECH CO LTD
Machining method for speed reducer support assembly
InactiveCN119304542AGuaranteed machining accuracyEasy to processPositioning apparatusMetal-working holdersReduction driveMachine
The invention relates to the field of speed reducer manufacturing, in particular to a machining method for a speed reducer support assembly. The speed reducer support assembly machining method comprises the steps that S10, the rear support unit based on the support assembly is positioned on the positioning assembly, and the positioning assembly is positioned on a machine table. And S20, the cutter unit carries out milling rough machining on the first center hole of the front support unit of the support assembly. The direction of the milling force of the cutter unit on the front support unit is the same as the thread locking direction of the front support unit and the rear support unit. And S30, the cutter unit carries out milling rough machining on the first circumferential side hole of the front support unit of the support assembly. And S40, the cutter unit conducts milling finish machining on the first circumferential side hole and the first center hole. And S50, the cutter unit carries out milling machining on the rear support unit. Therefore, the problem that the speed reducer support assembly is inconvenient to machine is solved.
Owner:JINCHENG NANJING ELECTROMECHANICAL HYDRAULIC PRESSURE ENG RES CENT AVIATION IND OF CHINA
Spring with positioning ring and elastic cushion
The invention discloses a spring with positioning rings and an elastic cushion comprising the spring, the spring comprises a spring body formed by spiral encircling, two ends of the spring body are encircled to form end face rings, the spring body is provided with at least one group of positioning rings, and the positioning rings are encircling rings of the spring body. The positioning ring is approximately parallel to the end face ring or approximately perpendicular to the elastic force direction of the spring body. The distance between the surrounding ring and the stress end is at least one fourth of the length of the spring. At least one group of positioning rings are designed on the spring body, the positioning rings are surrounding rings on the spring body, and the length of the positioning rings is larger than or equal to 1 / 2 of the circumference. The positioning ring is roughly parallel to the end face ring or roughly perpendicular to the elastic force direction of the spring body, in the follow-up assembling process, the connecting waist ring can be positioned, displacement of the connecting waist ring in the using process is effectively prevented, and convenience and stability of connection between the springs are improved.
Owner:NEW TEC INTEGRATION (XIAMEN) CO LTD
Flywheel unloading method in position protection period based on electric push mechanical arm
The invention provides a flywheel unloading method based on an electric pushing mechanical arm in a position protection period. The flywheel unloading method comprises the steps that a joint corner combination is selected when the thrust direction is in a position protection allowable range; the control torque under the joint rotation angle combination of each mechanical arm is determined, and an initial table look-up matrix is established; determining an optimal torque and a torque error allowable range; according to the control torque, the optimal torque and the torque error allowable range, grade division is conducted on the joint corner combination; constructing a cost function according to the optimal torque and the control torque; on the basis of grade division, the smaller the cost function is, the higher the priority of the joint corner combination is; selecting a joint corner combination with the highest priority from the initial look-up table matrix, performing permutation and combination of joint corners around the joint corner combination in a fine step length manner, determining a corresponding control moment, forming a second-order look-up table matrix, and selecting a joint corner combination with the highest priority; and circularly selecting the joint corner combination with the highest priority to obtain a final joint corner combination.
Owner:SHANGHAI AEROSPACE CONTROL TECH INST
Personal aircraft chassis and personal aircraft
The invention provides a personal aircraft chassis and a personal aircraft. The chassis comprises a main framework and a chassis body, the personal aircraft comprises a main framework and a thrust array assembly, the thrust array assembly is fixed to the main framework, thrust of the thrust array assembly is achieved through a plurality of first turbojet engines, the geometric position relation between the thrust action point and the thrust direction of the thrust array assembly and the main framework is kept fixed, and when the personal aircraft stops on the ground, the thrust array assembly is fixed to the main framework. The thrust direction of the thrust array assembly is perpendicular to the ground. The vector nozzle assemblies are fixed to the main framework, thrust of the vector nozzle assemblies is achieved through the second turbojet engines, the central axes of the second turbojet engines are perpendicular to the central axis of the first turbojet engine, and vector nozzles of the vector nozzle assemblies at least have one degree of freedom relative to the main framework. And high-dynamic, high-fault-tolerance and reconfigurable flight control which cannot be realized by utilizing pure thrust difference control can be realized.
Owner:WUJIE EXPLORATION (SHANGHAI) TECHNOLOGY CO LTD
Barb claw strength testing device
ActiveCN222353684UReduce flatness requirementsImprove reliabilityMaterial strength using tensile/compressive forcesForce sensorStrength testing
The utility model discloses a barb clamping jaw strength testing device which comprises a base, a fixing seat is arranged on the base, a simulation mounting groove is formed in the fixing seat, a barb clamping jaw is arranged in the simulation mounting groove through a mounting bolt, and the groove bottom face of the simulation mounting groove is used for limiting the extending posture of the barb clamping jaw. An oil cylinder is further arranged in the stress direction of the barb clamping jaw, the telescopic end of the oil cylinder is connected with a rod joint bearing through a force sensor, the rod joint bearing is connected with a convex jaw through a rotating shaft, the convex jaw is arranged at the extending end of the barb clamping jaw in a sleeving mode and exerts acting force, and the oil cylinder is arranged on the base. According to the utility model, the maximum failure load bearing capability of the barb jack catch and the anti-shearing capability of the fixed bolt can be tested.
Owner:SUZHOU XIBEIYOU OCEAN ENG EQUIP CO LTD
Detection equipment for hydraulic engineering pipeline
The invention is suitable for the technical field of pipeline detection, and provides a hydraulic engineering pipeline detection device which comprises a detection table, a sliding frame and a driving frame, the driving frame is fixedly connected to the detection table, the sliding frame is in sliding fit with the detection table, and the hydraulic engineering pipeline detection device further comprises a pressure applying assembly which is arranged on the driving frame and used for conducting pressure detection on a pipeline, the pressure applying assembly comprises a sliding table slidably connected into the driving frame, a motor is installed on the wall face of the sliding table, the output end of the motor is fixedly connected with a gear shaft, and the side, away from the motor, of the gear shaft is fixedly connected with a first supporting plate. The device has the beneficial effects that through the change of the meshing state of the movable toothed pipe and the driven gear and the change of the limiting state of the toothed plate in the first supporting plate by the clamping block, the detection effects of various different stress directions can be switched and achieved according to the detection requirements when the pressure applying assembly applies pressure to the pipeline, and the detection efficiency is improved. And the equipment can realize various different pressure applying functions through a simple mechanical structure.
Owner:ANHUI & HUAI RIVER WATER RESOURCES RES INST
Method for measuring grinding force of external thread of roller screw
The invention discloses a roller screw external thread grinding force measuring method. The method comprises the steps that a to-be-measured screw is installed on an external thread grinding machine tool in the mode that the to-be-measured screw is clamped by tips at the two ends of the machine tool; the two mechanical sensors are installed at the center position right facing the lead screw to be measured and face the normal grinding force direction and the tangential grinding force direction respectively; a to-be-measured lead screw clamped by double tips is regarded as a simply supported beam structure of which one end is fixed and hinged and the other end is movable and hinged, a mechanical sensor is regarded as an elastic support, a mechanical model is established, and the relationship among the measurement result of the mechanical sensor, an actual method and tangential grinding force at different grinding positions is obtained; and according to the measurement result of the mechanical sensor, the actual method and the tangential grinding force are obtained by utilizing the relation between the measurement result of the mechanical sensor at different grinding positions and the actual method and the tangential grinding force, and the actual grinding force is obtained after vector superposition. The device has the characteristics of clear and definite measurement principle, accurate and reliable measurement result, simple structure and convenience in assembly.
Owner:BEIJING RES INST OF PRECISE MECHATRONICS CONTROLS
Vehicle steering control method and device
The invention discloses a vehicle steering control method and device.The method comprises the steps that reference information of a vehicle is obtained, and the reference information comprises steering wheel torque, yaw velocity, accelerator opening degree information and brake opening degree information; outputting control information, wherein the control information is used for indicating the first request torque; wherein the first request torque is determined based on the reference information, and the first request torque is a demand torque which needs to be additionally superposed for controlling steering of the vehicle; a direction of the first requested torque is associated with a steering state of the vehicle, and the steering state of the vehicle is determined based on a desired yaw rate, yaw rate, and steering wheel torque of the vehicle. Therefore, the correctness of the power-assisted steering direction of the vehicle under any working condition can be ensured, and the stability of the vehicle body can be improved even if the vehicle runs on a separated road surface or a road surface with a low adhesion coefficient.
Owner:YINWANG INTELLIGENT TECHNOLOGIES CO LTD
Sealing ring for groove connection
The utility model discloses a sealing ring for groove connection for a high-pressure pipeline, which is matched with a hoop and comprises a rubber ring, a sealing ring and an elastic semi-ring, the sealing ring is located in the middle of the inner surface of the rubber ring and installed at the joint of the end faces of the two steel pipes, and the inner diameter is not larger than that of the steel pipes. The clamp and the inner side of the groove are in slope fit to provide sealing extrusion force for the end face of the steel pipe. The elastic semi-ring is arranged on the outer surface of the rubber ring or fixed in the rubber ring, and the assembling surface of the elastic semi-ring is consistent with the pre-tightening force direction of the bolt; or more than two sets of elastic semi-rings are uniformly distributed in the axial direction, and the splicing surfaces are mutually staggered. Or a cavity is formed in the rubber ring, passes through an inner opening in the inner end face of the inner pipe sealing ring, or is communicated with the outer pipe extending out of the outer side of the hoop. The utility model has the advantages of double sealing, good sealing performance and convenience in installation.
Owner:LIAONING HONGHAI XINXIN SEALING TECHNOLOGY CO LTD
Rope-driven goods storing and taking system
ActiveCN222523383UEasy to installStrong expandabilityStorage devicesControl theoryIndustrial engineering
The utility model discloses a rope driving type goods storing and taking system which comprises a goods shelf, and the goods shelf is provided with multiple layers of storage positions. The driving system can drive the taking and placing mechanism to reach each storage position; the taking and placing mechanism can take out the goods from the storage positions and can store the goods into the storage positions; the driving system comprises at least three groups of rope pulling devices, each rope pulling device is provided with a rope directly or indirectly acting on the taking and placing mechanism, and the force application directions of the ropes are different; and the maintaining device is used for maintaining the posture of the taking and placing mechanism. According to the utility model, the plurality of groups of pull rope devices drive the pick-and-place mechanism to move transversely and longitudinally through the ropes, the pull rope devices are convenient to install, and the pull rope devices act on the pick-and-place mechanism through the soft ropes, so that the installation position of the pull rope devices is less limited, and the overall expansibility of the goods access system is strong; and only the pull rope device needs to be reinstalled, so that the expansibility of the system is greatly improved.
Owner:MUXING ROBOTICS (ZHEJIANG) CO LTD
Device and method for measuring size of cable force and position of lug plate
Owner:BEIJING UNIV OF TECH
Support for arthroscopic surgery in sports medicine
The invention relates to the technical field of arthroscopic surgery instruments, in particular to a support for a sports medicine arthroscopic surgery, which comprises a support, a lifting platform and a leg fixing mechanism, and the lifting platform locks the height position of the leg fixing mechanism on the support through a limiting bolt; the leg fixing mechanism comprises a fixed frame fixedly connected with the lifting table and a movable frame hinged through a rotating connector. The pull rope is wound around the guide wheel in the sliding rail box to be connected with the shank binding belt, and when the knee joint bends and stretches, the second spring pushes the sliding block to move in a self-adaptive mode; during knee bending, the spring extends to compensate looseness of the pull rope; when the knees stretch, the springs are compressed to absorb redundant tension. The tensile force is always perpendicular to the shank axis through mechanical decomposition, and lateral shearing force is eliminated. A spring dynamic compensation mechanism maintains constant upward effective component force, pulling force direction deviation caused by a traditional fixed fulcrum is avoided, unexpected internal rotation during shank lifting is fundamentally restrained, and knee joint ligaments are protected against abnormal stress damage.
Owner:乐清市人民医院
Anchor rod drawing force testing device
InactiveCN119290597Aimprove integrityimprove accuracyMaterial strength using tensile/compressive forcesClassical mechanicsStructural engineering
The invention relates to the technical field of anchor rod tensile capacity testing, in particular to an anchor rod drawing force testing device which is characterized in that a stretching mechanism and a lower clamping mechanism are arranged on an operation table, an upper clamping mechanism is arranged above the lower clamping mechanism, and a positioning mechanism is arranged on the upper clamping mechanism; through cooperation of the stretching mechanism and the positioning mechanism, axial testing tension can be applied to the pipe seam type anchor rod, and eccentric oblique tension at different angles can also be applied to the pipe seam type anchor rod; according to the invention, the tensile mechanism is matched with the lower clamping mechanism and the upper clamping mechanism, so that tensile performance tests in different force application directions can be simultaneously carried out on a plurality of pipe seam type anchor rods through a single driving source in the same test equipment; through cooperation of the lower clamping mechanism and the upper clamping mechanism, the pipe seam type anchor rods with different diameters can be accurately clamped and positioned, and the problem that the tensile property of the pipe seam type anchor rods is affected due to clamping deformation can be solved.
Owner:ANQING COPPER MINE OF TONGLING NONFERROUS METALS GRP CO LTD +2
Picking machine for driving fruit trees to do elliptical reciprocating motion
The utility model provides a picking machine for driving fruit trees to do elliptical reciprocating motion, and belongs to the field of agricultural machinery. The picking machine comprises a machine body, a reversing eccentric rotation mechanism and a clamping mechanism; the reversing deflection rotation mechanism is fixed to the machine body and provided with a first input part and a first output part, the input force direction of the first input part is perpendicular to the output force direction of the first output part, and the first input part is connected with an external driving device. One end of the clamping mechanism is rotationally connected with the first output part and does circular motion with the rotating center of the first output part as the circle center, and the other end of the clamping mechanism is connected with an operation fruit tree. According to the picking machine, rigid excitation is achieved through the simplified reversing deflection rotating mechanism and the clamping mechanism, the operation fruit trees are driven by the deflection rotating vibration mechanism to do elliptical reciprocating motion, the fruit falling rate of the operation fruit trees, especially transverse branches, is remarkably increased, the optimal operation efficiency can be achieved with the minimum energy consumption, and the labor intensity of workers is lowered. The device has the advantages of compact structure, low cost, reliable operation, low failure rate and the like.
Owner:HANGZHOU WANGCHAO AGRICULTURAL TECHNOLOGY CO LTD
A robot for detecting a cable of a cable-stayed bridge
ActiveCN117026801BBridge structural detailsUsing optical meansStructural engineeringSteering control
The application provides a robot for detecting a cable of a cable-stayed bridge, comprising a robot body, a guide wheel mechanism arranged on an inner wall of the robot body, two steering control mechanisms arranged symmetrically on an outer wall of the robot body, and a ducted fan connected to the steering control mechanisms and used for controlling a thrust direction of the ducted fan.
Owner:SHANGHAI XIQU VALLEY TECHNOLOGY CO LTD
Slinging / unslinging remote operation device
To provide a slinging / unslinging remote operation device capable of applying even to a narrow place especially by making the shape of a pin thinner and compacting an entire hook.SOLUTION: An slinging / unslinging remote operation device 10 of the present invention comprises: a frame body 20 connected to a wire hung down from a crane; a cradle body 44 extending downward from the frame body and having a cradle 40 magnetically attracted to an opening surface of a hanging metal tool at a bottom end of the cradle body; and a hook 50 to perform slinging or unsliging by making opening / closing movement toward an opening of the hanging metal tool which is attracted magnetically to the cradle and overlaps the opening. The hook comprises: a pin 52 having a smaller diameter than an opening of the cradle; a slider for supporting the pin; and a hook body connected to the slider at its lower end via an elastic body. It is characterized that the pin engaged in the opening of the cradle is forced toward the upper side of the opening of the cradle by the elastic body, and is subjected to a load in an opposite forced direction of the elastic body when hanging the hanging metal tool, and a tip side of the pin touches an opening bottom surface of the cradle.SELECTED DRAWING: Figure 1
Owner:HITACH PLANT CONSTR
True triaxial mechanical test device applied to variable-angle repeated loading and impact disturbance
The invention relates to the technical field of rock mechanical tests, in particular to a true triaxial mechanical test device applied to variable-angle repeated loading and impact disturbance, which comprises a variable-angle transmission mechanism, the variable-angle transmission mechanism comprises a variable-angle transmission main body, variable-angle transmission assemblies symmetrically arranged at the two ends of the variable-angle transmission main body, a box body arranged on the peripheries of the variable-angle transmission main body and the variable-angle transmission assemblies and a force transmission assembly arranged on the box body, and the variable-angle transmission main body comprises a plurality of transmission modules arranged in an array mode in the circumferential direction of the Y axis; the variable-angle transmission assembly comprises a transmission rod and a limiting transmission plate, the limiting transmission plate is arranged in the test piece containing cavity, the transmission rod is fixedly connected with the limiting transmission plate, and when the transmission rod rotates, the limiting transmission plate is driven to rotate so as to drive the variable-angle transmission main body to rotate; therefore, the rock test piece arranged in the test piece accommodating cavity rotates, and the stress direction angle of the roadway in the rock test piece is changed.
Owner:ANHUI UNIV OF SCI & TECH
Automobile metal plate repairing device with auxiliary support
The automobile metal plate repairing device comprises a support mechanism, a drawing tool and a traction structure, the support mechanism comprises a base, a sliding table is horizontally arranged on the top face of the base in a sliding mode, and a rotary table is rotationally arranged on the top face of one side of the sliding table. The drawing tool is arranged on the support mechanism, the drawing tool is used for conducting drawing operation, the traction structure is used for providing drawing power, the sliding table moves so that the drawing tool can be conveniently carried to move to the operation position, the horizontal angle orientation of the drawing tool can be changed through rotation of the rotary table, and the length of the stretching assembly can be changed through stretching and retracting. The tool fixing frame assembly generates pulling force on the tool fixing frame assembly, and then the vertical angle orientation of the carried drawing tool is changed, so that during drawing, the force application direction of the drawing tool can be consistent with the direction of collision force generated by the sunken part, the drawing effect is better, the angle does not need to be finely adjusted through manual operation, and the technology of repairmen is not depended; and the pit repairing effect is better.
Owner:重庆千能机械制造有限公司
Motor rotor shaft pre-tightening structure and motor
PendingCN119448649AGuaranteed uptimeavoid failureSupports/enclosures/casingsClassical mechanicsElectric machinery
The invention provides a motor rotor shaft pre-tightening structure and a motor. The motor rotor shaft pre-tightening structure comprises a stator, a rotor shaft and a bearing. The stator is provided with a shaft hole, the first end of the rotor shaft is inserted into the stator inner cavity from the shaft hole, and the bearing is fixed on the rotor shaft and located in the stator inner cavity; the bearing and the rotor shaft divide the inner cavity of the stator into a closed compression cavity, the second end of the rotor shaft is provided with a communication groove part, one end of the communication groove part is communicated with the outer side of the stator, and the other end is communicated with the closed compression cavity; when the rotor shaft rotates, air on the outer side of the stator can be driven to enter the closed compression cavity along the communicating groove part, and due to the fact that the closed compression cavity is not provided with an outlet and only provided with an inlet in the communicating groove part, the rotor shaft continuously drives the air to enter the closed compression cavity in the rotating process, so that high-pressure air is formed in the closed compression cavity; the pressure directions of the high-pressure air acting on the rotor shaft and the stator are opposite, so that pretightening force between the rotor shaft and the stator is formed, and the stator and the rotor shaft can stably and reliably operate.
Owner:INVT POWER ELECTRONICS SUZHOU CO LTD
Stretching detection system based on cloth detection
ActiveCN120721505AMaterial strength using tensile/compressive forcesInvestigating abrasion/wear resistanceSelf adaptivePhysics
The invention provides a stretching detection system based on cloth detection, and relates to the technical field of cloth detection. A graduated scale is fixed on the seat body, a rotating shaft is rotationally arranged on the seat body, a rotating seat A is welded to one end of the left side of the rotating shaft, a clamping block A is rotationally connected to the rotating seat A, a sliding seat A is welded to the top end face of the clamping block A, and a clamping block B is arranged on the sliding seat A in a sliding mode. The clamping block A and the clamping block C flexibly rotate through the rotating seat A and the rotating seat B respectively, when the cloth inclines due to clamping deviation, the two rotating structures can drive the clamping blocks to adjust the direction in a self-adaptive mode in the stretching process, and test errors caused by pulling deviation are effectively counteracted. Meanwhile, the spring rod A and the spring rod B provide elastic support for the clamping block A and the clamping block C respectively, the clamping blocks are kept in a non-inclined state through the elastic force effect in the initial clamping stage, the clamping angle deviation is avoided from the source, and it is ensured that the stress direction of the cloth is consistent with the height required by the test.
Owner:NANTONG DISHUN INTERLINING CO LTD
Method and system for determining three types of cyclic stresses for evaluating service life of wheel disc
The invention relates to the technical field of aero-engines, and discloses a three-class cyclic stress determination method and system for wheel disc life evaluation, and the method comprises the steps: carrying out the stress finite element simulation analysis of a wheel disc under a transient load, so as to obtain the stress history of a key part of the wheel disc at each time point in the same stress direction and at the same temperature; and constructing a stress inflection point course of the key part of the wheel disc according to stress inflection points in the stress course so as to realize determination and extraction of three types of cyclic peak-valley value stress. The method not only considers the influence of transient load, but also ensures that stress analysis is carried out under a unified direction reference through conversion of the direction cosine matrix, so that stress data and life data at different time points can be compared under the same temperature and stress direction conditions, thereby providing support for effective determination of fatigue damage of the wheel disc, and improving the accuracy of fatigue damage determination of the wheel disc. The situation that in the prior art, the stress direction difference is not considered, so that deviation danger exists when fatigue damage of the wheel disc is analyzed according to three kinds of cyclic stress is avoided.
Owner:AECC SICHUAN GAS TURBINE RES INST
Sealing performance detection device suitable for linear guide rail rubber sealing element
The invention discloses a sealing performance detection device suitable for a linear guide rail rubber sealing element, relates to the technical field of sealing performance detection, optimizes a linear guide rail function test process, and is specifically characterized in that two to-be-detected workpieces are arranged on two sides of an action crankshaft, and a plurality of eccentric action positions are arranged on the action crankshaft; the device is mainly used for limiting the setting positions of a rotating point A and a connecting point B, so that one end of a pneumatic connecting rod performs eccentric rotation action through an action crankshaft, and application requirements of different stress directions can be simulated when a workpiece to be tested is maintained to slide horizontally. The method is mainly used for shortening test time consumption, and has the key content that a current value of a driving motor assembly is used as a basic reference condition, and an error ratio obtained by calculating a pressure value, a temperature value and a vibration frequency is used for performing complementary analysis; therefore, the state of the sealing performance is judged.
Owner:WUXI HUAYAN BEARING SEALING PARTS CO LTD