37 results about "Transmission (mechanics)" patented technology

The invention relates to an improved method for optimally designing noise of a bevel gear, belonging to the field of optimal design of transmission gears. The invention provides an improved method for optimally designing a main parameter of a bevel gear of a transmission through an Ishikawa method based on a material mechanics theory; by means of the method, the gear engagement transmission error can be reduced; therefore, vibration and noise in an engaging process can be reduced; the service life is increased; and the driving and riding comfort is improved. The method disclosed by the invention comprises the following steps: (1), establishing a calculation model of the dynamic engagement stiffness and the dynamic transmission error in the engagement process of the bevel gear, wherein the calculation model is used for calculating a fluctuation value of the dynamic engagement transmission error of the bevel gear; (2), based on the calculation model obtained in the step (1) and gear design regulatory requirements, establishing an optimal design model of the main parameter of the bevel gear of the transmission aiming to reduce the noise and the volume and simultaneously ensure the intensity and the reliability in the use process, and optimally designing the bevel gear of the transmission; and (3), checking an optimal parameter obtained by optimal design so as to ensure the accuracy of an optimal result.

The invention discloses a portable type multifunctional material mechanics teaching aid which comprises a machine frame. The top face of the machine frame is connected with a first supporting plate. A second supporting plate is arranged below the first supporting plate. A driving device is arranged below the second supporting plate. A transmission device is arranged between the first supporting plate and the second supporting plate. The driving device is connected with the transmission device. A clamping device comprises a supporting head placed above the first supporting plate. A supporting stand column, an upper clamp base connected with the supporting head, a lower clamp base which penetrates through the first supporting plate and is connected with the output end of the transmission device and a set of clamp which is in detachable connection with the upper clamp base and the lower clamp base are arranged between the supporting head and the first supporting plate. A clutch device is arranged on the second supporting plate and controls the lower clamp base to rotate. Through axial displacement and rotation of the lower clamp base, various experiments such as stretching, compressing, bending and reversing and a deflection demonstrative experiment can be completed with various clamps matched, corresponding mechanical performance indexes of experiment pieces of different materials are obtained, operation is easy, and convenience and flexibility are achieved.

The invention provides a cylindrical cabin section wallboard structure simulation static test device and method, and relates to the technical field of aerospace mechanics testing. The device comprises a horizontal plate, a vertical frame, a cabin wall connecting structure and a loading mounting seat, the horizontal plate simulates a mounting plate structure in a cabin body, the horizontal plate is mounted on a cylindrical cabin section wall plate structure, and the cabin wall connecting structure comprises an adapter block and a connecting beam and simulates longitudinal and transverse force transmission structures in the cabin body. The vertical frame is fixedly connected with the horizontal plate and the bulkhead connecting structure to simulate the longitudinal bearing of a bulkhead wall plate structure, and the loading mounting seat is fixed on the horizontal plate or the vertical frame to simulate the actual bearing position of a cylindrical bulkhead section wall plate structure and the mounting of longitudinal and transverse loading devices. The device is used for carrying out the static test on the cylindrical cabin wall plate structure, simulating the bearing and force transmission paths of the structure, and simulating the transverse and longitudinal loads of the cabin wall plate structure, so that the test precision is improved, and the reliability and scientificity of the test structure are ensured.

The invention discloses a rock creep test method and device under the action of multiple environments, and belongs to the technical field of rock mechanics tests. The device adopted by the invention comprises a rack part and a test part. The rack part is provided with a rack plate, columns are arranged on the bottom side of the rack plate, a large wheel disc and a small wheel disc are integrally arranged on the bottom side of the rack plate, and weights are connected to the periphery of the large wheel disc. The periphery of the small wheel disc is connected with a lever through a hinge chain,a balance weight is arranged at the other end of the lever, a shaft a fixing component is arranged on the bottom side of the rack plate, and the lever is connected with the shaft a fixing component through a shaft a; the test part is provided with a base, the base is arranged on the upper surface of the rack plate on the column a side; an environment box is arranged on the base, a rock sample isarranged in the environment box, a pressure head is arranged above the rock sample, the side surface of the base is connected with one side of an LVDT frame, the other side of the LVDT frame is connected with an LVDT, the top end of the LVDT is connected with the bottom side of the pressure head, a load sensor is arranged above the pressure head, and a cross beam is arranged above the load sensor.The lever principle and the wheel set transmission principle are used for jointly amplifying the multiple of force, and pressure is applied to a rock sample through weights.

The invention discloses a combined cable collecting and releasing aviation winch cable arrangement device capable of being used for collecting and releasing cable arrangement of variable-cable-diameter variable-cross-section combined cables. The combined cable collecting and releasing aviation winch cable arrangement device comprises a lead screw supporting structure, a lead screw drive mechanism,a cable guide mechanism and an active traction mechanism. A motor I drives a lead screw to rotate through chain transmission. The cable guide mechanism and a lead screw nut do reciprocating linear movement along the lead screw. By controlling the rotating speed ratio of a drum motor and the motor I, variable-diameter cable arrangement can be achieved. By means of independent chain belts, conveying chains can have large bending radii within limited arc sections, and a large amount of space is saved compared with conventional pulley cable guide. A righting frame is designed into a beak shape onthe basis of the collision mechanics principle, and a streamline body which inclines can be effectively overturned and righted and can smoothly pass the cable arrangement device. By means of the active traction mechanism, the active traction and looseness prevention functions can be achieved by changing the spring expansion and contraction quantity and the rotating speed of a motor II to adjust the friction force exerted by rollers on the combined cables. The whole cable arrangement device is small in weight, small in size and particularly suitable for being used on aviation winches.

The invention belongs to the technical field of ship engineering and fluid mechanics, and particularly relates to a propeller turbocharging device. Comprising a ship body, a steering rudder driving rod is installed on the ship body, a steering rudder is fixedly installed at the lower end of the steering rudder driving rod, a support and a propeller assembly are further installed on the ship body, a fairing assembly is installed on the support, and one side of the propeller assembly is located in the fairing assembly. The propeller blade hub is driven to rotate through the propeller blade transmission shaft, the propeller blades are driven to rotate through the propeller blade hub, water flow is driven to flow through the propeller blades, and then the ship body is pushed to move forwards through the counter-acting force of the water flow. Tangential and radial velocity components in the wake flow of the propeller are extracted through a turbine area and turbine blades, and the energy is applied to increase of the water inlet pressure of the propeller. The turbine area can be driven by the wake flow area to actively provide kinetic energy and increase the water pressure at the front end of the propeller; and the direction of the ship body can be controlled through the steering rudder.

The invention relates to a self-charging electric vehicle which mainly comprises a crossbeam, a front axle, a rear axle, an elevation, a front left and right wheel axle brake drum, a rear left and right wheel axle brake drum, front wheels, rear wheels, a shock absorber, a steering wheel, a drag link, a crank arm, a track rod, a transmission shaft, a differential mechanism, a half shaft, a framework, a storage battery, a motor, a main switch, an accelerator pedal, an adjustor, a charger, a switch with front-section acceleration, middle-section brake and rear-section backing, a switch with lower-section low speed, middle-section medium speed and upper-section high speed, a switch for which a brake system can be automatically powered on, a brake light is lightened and an acceleration system is powered off when a brake is treaded and a brake light system is powered off and the acceleration system is powered on when the brake is released, as well as a brake pedal, a hand brake handle, a transmission box, a motor and rear axle connecting gear, a front brake disc, a rear brake disc, an adjusting arm, a wheel cylinder piston, an energy indicating gauge, a shift lever, a front wheel axle belt, a chain, a transmission box connecting gear and the like. Through the structure that the rear wheel axle rotates the mechanical connecting gear and a generator, the generated power mechanics and inertia power are used for charging the storage battery. The storage battery supplies power for the electric vehicle, so that the electric vehicle realizes a power function to be started. The invention is a modern and environment-friendly, energy-saving and economic electric vehicle, and has the advantages of no pollution to the air, low cost, simplicity in manufacturing, convenience in use, and the like.

The invention relates to a miniature heavy-load uniaxial pressure test system with a mechanical arm and a test method, which belong to the technical field of rock mechanics tests. The test system comprises a loading mechanism, a transmission mechanism, a control mechanism, a power distribution mechanism and a supporting seat, wherein the loading mechanism is arranged on the supporting seat, the transmission mechanism penetrates through the supporting seat to be connected with the loading mechanism, the transmission mechanism is connected to the control mechanism, and the transmission mechanism and the control mechanism are both connected to the power distribution mechanism. The power distribution mechanism supplies power to the transmission mechanism and the control mechanism, and the control mechanism controls the transmission mechanism to apply load to the loading mechanism. Miniature heavy load is achieved, the test precision is high, control is easy, the test method is simple, test data are complete, and students can obtain complete test results and understand the rock strength constitutive relation.

The invention discloses a silicone oil fan clutch heat dissipation performance analysis method based on finite elements. The method comprises: establishing and simplifying a three-dimensional structure model of a silicone oil fan clutch; according to a hydro-viscous transmission theory, calculating a heat generation rate and a shell heat dissipation rate when the silicone oil fan clutch works by applying theoretical knowledge, and reconstructing a silicone oil heat source; dividing grids by utilizing grid division software, and inputting physical parameters obtained by calculation; and simulating the silicone oil fan clutch model through fluid mechanics software, and carrying out post-processing on a calculation result so as to further analyze the heat dissipation performance of the silicone oil fan clutch. According to the method, the heat dissipation performance of the silicone oil fan clutch under different working conditions and the temperature condition of silicone oil can be accurately analyzed, so that a large amount of time required by an experiment is saved, and the problems of inaccurate temperature measurement in the experiment and the like are solved. And a theoreticalbasis is provided for structural improvement of the silicone oil fan clutch. The invention relates to the technical field of automobile part computer aided engineering.

The invention discloses a labor-saving rotary power transmission device. The labor-saving rotary power transmission device comprises a power end gear, a load end gear, a lever gear, a support point gear and a lever positioning wheel, wherein the power end gear, the load end gear and the support point gear are connected with the lever gear in a rotary transmission mode, the support point gear is located between the power end gear and the load end gear and is closer to the load end gear, the lever positioning wheel can rotate but can not move, and the lever positioning wheel is connected with the lever gear in a positioning mode so that the lever gear can rotate in a positioning mode. On the basis of direct transmission of a traditional gear, the lever gear, the support point gear and the lever positioning gear are additionally provided, three mechanics principles of a lever, a fixed pulley and a movable pulley are integrated, labor-saving transmission of rotary power is achieved, and the power transmission direction can be changed through simple processing according to needs. The labor-saving rotary power transmission device can be widely applied to rotary power transmission of various machines, meets the requirement for load acting, saves power energy, lowers operation cost, and is favorable for environment protection.

The invention provides a modular portable rock mechanics parameter tester, which comprises a machine frame, wherein a jack is arranged at the bottom part in the machine frame; a pressure sensor is arranged in the rack and corresponds to the upper part of the jack; one end of the jack is detachably connected with a lower pressing head or a rock triaxial test pressure cabin; a test piece crushing and receiving disc is arranged on the lower pressing head; one end of the pressure sensor is detachably connected with an upper pressing head; a linear displacement sensor is arranged on the machine frame; an axial displacement transmission plate is arranged on the lower pressing head; the side surface of the machine frame is detachably connected with a driving motor, and one end of the driving motor is connected with a horizontal rotating shaft; a test piece supporting plate is detachably connected to the rotating shaft; and an inclination angle sensor is arranged on the test piece supporting plate. The modular portable rock mechanics parameter tester provided by the invention is convenient to operate and can be used for outdoor detection.

The invention discloses an electric ship outboard motor driving structure which comprises a shell and a driving assembly. A first motor shaft gear and a second motor shaft gear are in key connection with a first motor shaft and a second motor shaft respectively; a transmission shaft gear is simultaneously meshed with the first motor shaft gear and the second motor shaft gear; a rotating shaft is horizontally and rotationally arranged on the inner wall of the lower shell, and the first paddle is arranged on the first paddle mounting pipe; a third bevel gear is arranged on the rotating shaft, and the third bevel gear is meshed with the first bevel gear; a fourth bevel gear is rotationally connected with the rotating shaft, and the fourth bevel gear is engaged with the first bevel gear; a connector is connected with the fourth bevel gear; and a second paddle is arranged on the second paddle mounting pipe. According to the invention, by arranging the double motors, the overall working efficiency is improved, the size is reduced, and the power density is improved; the arrangement structure accords with the fluid mechanics principle, and the water facing area is reduced compared with the single equal motor power; therefore, the water facing area of the whole machine is reduced, the water facing face better meets the hydromechanics requirement, and the sailing efficiency is improved.

The invention discloses a traction wheel and a threading machine comprising the traction wheel, and belongs to the technical field of building electromechanics, the traction wheel comprises a tractionwheel body, the outer edge of the traction wheel body is provided with at least one protruding feature, and the protruding feature drives a threading wire to do intermittent motion; the threading machine comprises a motor and a machine frame, a transmission assembly is arranged in the machine frame, the motor drives the transmission assembly, the traction wheel is arranged on the machine frame, the transmission assembly drives at least one traction wheel, and the traction wheels can abut against a threading wire and drive the threading wire to move. According to the technical scheme, disturbance and impact movement is added to stable movement of the threading wire through intermittent movement, so that the threading wire more easily passes through the 90-degree straight bend and the variable cross section of the connecting pipe, meanwhile, traction force required for pulling the threading wire with the same length is greatly reduced, the number of traction systems can be reduced, threading efficiency is improved, and the threading cost is reduced.

The invention provides a single flapping wing experimental device for hydrodynamic hydrodynamic performance research. The single flapping wing experimental device comprises a rack, two linear sliding tables, a linear track, a steering engine, a flapping wing, a motor and a camera, the two linear sliding tables are fixed to the two sides of the top of the rack in parallel. The two ends of the linear track can be slidably connected to the two linear sliding tables in the length direction of the linear sliding tables, and the motor is in transmission connection with the linear track. The flapping wing is fixed below the linear track through a steering engine; the camera is fixed right above the center of the rack; and the steering engine, the motor and the camera are connected with a controller. According to the single flapping wing experimental device for hydrodynamic performance research of fluid mechanics, the automatic reset function can be achieved, and the working efficiency is effectively improved; a wave absorbing beach is arranged to eliminate the influence of wave reflection; through the cooperation of the camera and the controller, the specific position of the single flapping wing at each time point can be monitored and reported in real time, and specific data under various moving trajectories during sliding of the flapping wing can be provided.

The invention discloses a cavitation flow numerical value calculation method for a water-jet propeller, and belongs to the technical field of fluid mechanics numerical value calculation. The method comprises the steps of establishing a turbulence model considering a rotation effect, and performing single-phase flow calculation of the propeller; and then, establishing a cavitation model considering the rotation effect, carrying out cavitation flow numerical value calculation on the water-jet propeller by taking a single-phase flow calculation result as an initial value, and finally, obtaining the cavitation flow field information. According to the method, the influence of vapor and liquid multiphase flow compressible characteristics on a turbulence viscosity coefficient is considered, meanwhile, the influence of a strong rotation boundary on the cavitation inter-phase mass transmission is considered, the turbulence time scale is adopted to replace the relaxation time scale of phase change, the cavitation flow field simulation is associated with the flow field structure information, and then the numerical value calculation result better conforms to an actual flow field, and the prediction precision is higher.

The invention provides a magnetic balance car, and belongs to the technical field of electromechanics. The balance car comprises a fixed car frame, two movable car frames, two rotating shafts corresponding to the two movable car frames respectively and two wheels, wherein the two movable frames are movably connected to the two ends of the fixed frame respectively, the two rotating shafts are rotationally connected, the two wheels are fixedly connected with the two rotating shafts respectively, the movable frames and the fixed frame are rotationally connected to the two rotating shafts respectively, and a magnetic driving mechanism is arranged between each rotating shaft and the corresponding wheel. Each magnetic driving mechanism comprises a transmission chain wheel fixed on the corresponding rotating shaft, and a first transmission chain and a second transmission chain are simultaneously meshed with the transmission chain wheel. A power supply connected with a first coil, a second coil, a third coil and a fourth coil is arranged in the fixed frame. The balance car has the advantage of being capable of being controlled to run through magnetic force.

The invention provides double-flapping-wing test equipment for fluid mechanics reinforcement learning. The double-flapping-wing test equipment comprises a rack, an electric cabinet and two displacement mechanisms, each displacement mechanism comprises two linear sliding tables, a linear track, a steering engine, a flapping wing and a servo motor; the four linear sliding tables of the two displacement mechanisms are parallel to each other; the two ends of each linear rail can be slidably connected to the two corresponding linear sliding tables in the length direction of the linear sliding tables, and the servo motors are connected to the tail ends of the linear sliding tables through the motor connecting cages and are in transmission connection with the corresponding linear rails. The flapping wings are fixed below the corresponding linear rails through the corresponding steering engines; and the steering engine and the servo motor are connected with the electric cabinet. According to the double-flapping-wing test equipment for fluid mechanics reinforcement learning, an operator only needs to import an algorithm into a computer in the electric control box, and then optimal data can be obtained through reinforcement learning, so that the working efficiency is effectively improved, and the time cost is saved; and the mutual influence of the two flapping wings in hydrodynamics and hydrodynamic force can be researched.

The invention discloses a rapid water evaporation humidifying device utilizing fluid mechanics, and belongs to the field of humidifying equipment. The rapid water evaporation humidifying device utilizing the fluid mechanics comprises a box body, wherein a net plate is fixedly connected to the top in the box body, a cover plate is fixedly connected to the upper portion of the net plate, an air ductis formed between the cover plate and the net plate, and a bending plate is fixedly connected to one side of the cover plate; an air wheel is arranged at the air duct and rotationally connected withthe bending plate through a first rotating shaft, a supporting mechanism corresponding to the first rotating shaft is connected to the bending plate, and a rotating motor is fixedly connected to the bending plate; a second rotating shaft is fixedly connected to the output end of the rotating motor, the other end of the second rotating shaft is rotationally connected with the box body, and the second rotating shaft is in transmission connection with the first rotating shaft through a transmission mechanism; and a stirring rod is rotationally connected into the box body, and the stirring rod isconnected with the second rotating shaft through a speed reducing mechanism. According to the rapid water evaporation humidifying device utilizing the fluid mechanics, the indoor humidity can be increased, meanwhile, a user can be cooled, and the use effect is good.

The invention discloses an X-shaped fast folding sliding block driving bicycle, and comprises an X-shaped frame structure capable of being folded fast and a sliding block driving assembly, a front wheel support assembly and a rear wheel support assembly are hinged together through a cross shaft assembly, wherein the steering function and the folding function are combined into a whole, and the rapid folding of the main body structure can be completed by one folding step; the driving device comprises two driving sliding blocks which do linear reciprocating motion along the square tube of the front wheel support, and pedals arranged on the driving sliding blocks are treaded to drive a flywheel and a chain which are assembled in the square tube of the front wheel support to transmit power to the driving wheels so as to drive the vehicle to run. The folding structure is simple and reliable, the transmission mode better conforms to human mechanics, torsion output is more continuous and balanced, and the folding device is more convenient to store and can be carried about after being quickly folded.

The invention discloses a loading device and a debugging method for an epoxy resin model fracture test, and belongs to the technical field of experimental mechanics. The loading device is composed of an electric control system, a detection sensing system, system software and a mechanical tool, wherein the electric control system comprises a PLC, an upper computer, a frequency conversion speed regulator and a motor, the mechanical tool comprises a base used for supporting and fixing the motor, a plum blossom joint elastic coupling installed on an output shaft of the motor, a transmission shaft, a stand column type bearing seat and an incubator inner bearing seat. The real working condition of the prototype is simulated when the epoxy resin model fracture test is carried out, the elastic-plastic state of the prototype is simulated by utilizing the transition state of the model, and the test precision is improved. The circumferential pre-tightening force is added to the epoxy resin model, so that the deformation of the model before fracture is reduced, and the test is more in line with the real working conditions of the prototype.

The invention discloses a special dynamic and static combined hydraulic cylinder for rock and soil mechanics test equipment, which comprises a static loading hydraulic cylinder barrel, a static loading hydraulic cylinder plunger, a static loading hydraulic cylinder end cover, a dynamic loading hydraulic cylinder front end cover, a dynamic loading hydraulic cylinder rear end cover, a dynamic loading hydraulic cylinder piston rod, uniformly distributed load compensation hydraulic cylinder end covers, uniformly distributed load compensation hydraulic cylinder piston rods, a static load transmission pad, a dynamic load transmission pad, a retainer and a loading head. The dynamic loading hydraulic cylinder is integrated in the static loading hydraulic cylinder. The high frequency loading of dynamic load is realized by oil filling and discharging of dynamic loading hydraulic cylinder oil inlets and outlets, and plunger extension is realized by oil filling of a static loading hydraulic cylinder control oil port to realize loading of static load. According to the invention, a single hydraulic cylinder unit is adopted to realize the loading process of static load and dynamic load at the same time, so that the loading head is ensured to be always attached to the loading surface of the test piece, and the static load is ensured to be uniformly distributed on the loaded surface of the testpiece.

According to the 360-degree full-rotation pod type underwater motor ship contra-rotating propeller propelling device, energy is saved by 20%, and the navigational speed and propelling efficiency are improved by 12% or above. An encoder, a special motor, a speed reducer and a reduction gear are adopted to achieve 360-degree full-rotation synchronization and non-synchronization whole-process electronic control of the propeller-rudder rotation body according to the advanced intelligent control theory, reversing is 1.6-1.8 times fast, and navigation is particularly safe. The underwater motor drives a transmission device to be connected with contra-rotating propellers, three components in the transmission device operate at the same time, the power and torque sharing proportion of the two contra-rotating propellers is calculated through the interdisciplinary innovation basic theory according to the speed ratio and the tooth number ratio, the contra-rotating propellers play the best energy-saving effect and efficiency in combination with the hydromechanics propeller pitch ratio theory, and the device is suitable for ships of any power type and military ships and boats, and solves the problems of high efficiency, energy conservation, environmental protection, noise reduction, vibration reduction and cost reduction of inboard and outboard ship contra-rotating propeller propelling devices which cannot be solved for many years are solved.

The invention discloses a pneumatic (electric) wrench for connecting straight thread sleeves and reinforcing steel bars. The pneumatic (electric) wrench is a tool with the function of rapidly connecting and fastening the straight thread sleeves for the reinforcing steel bars. The pneumatic (electric) wrench comprises a straight thread sleeve (reinforcing steel bar) meshing and engaging device, a rotating torque vertical deviator, a reinforcing steel bar connecting pneumatic (electric) transmission device and the like. By means of the pneumatic (electric) wrench, mechanical installing is realized, labor operations are reduced, and the pneumatic (electric) wrench is an indispensable tool for improving the reinforcing steel bar field connection engineering to the mechanical constructing; by means of the mechanics principle and the pneumatic (electric) principle, worker operations are facilitated, labor efficiency is improved, and construction cost is reduced; and the operation environmentis optimized, no climbing is needed when columns and the reinforcing steel bars are connected, no far-distance operations are needed when beams and the reinforcing steel bars are connected, and operation safety is ensured.