1235 results about "Gear transmission" patented technology

The utility model belongs to the technical field of tractors, and particularly relates to a tractor combined motor gearbox assembly which comprises a gearbox body, a generator and a driving motor are coaxially arranged on the side wall of the gearbox body, the outer end of an input shaft of the generator is in transmission connection with the crankshaft output end of an engine, and an input shaft is supported on the gearbox body. The input shaft is a hollow shaft, one end of the PTO shaft axially penetrates through the output shaft of the driving motor and is connected with a spline at the inner end of the input shaft of the generator, the other end of the PTO shaft is supported in an inner hole of the input shaft through a lining, the input shaft is connected with the inner end of the output shaft of the driving motor through a spline sleeve, and the gearbox body supports the output shaft. A gear transmission assembly is arranged between the input shaft and the output shaft. The PTO shaft is directly connected with the output shaft of the engine, the engine provides power for the generator to provide electric energy for the driving motor, then the driving motor provides power for the gearbox assembly, the operation requirement of the tractor is met, and stepless speed change can be achieved.

The invention discloses a face gear planetary transmission system dynamic uniform load test platform and test method, and belongs to the field of gear transmission, and the test platform comprises a rack, a drive motor, a step-up gear box, a face gear planetary transmission system, a magnetic powder brake, a torque sensor, a slip ring, a stress strain test system and the like. The face gear planetary transmission system comprises an input face gear, a planet wheel, a planet carrier, a fixed face gear and the like. According to the dynamic uniform load test, stress values at the tooth root of the face gear and the tooth root of the planetary gear are measured mainly through strain gauges, and the corresponding relation between the tooth root stress and the meshing force at the gear meshing point is obtained through finite element simulation. And calculating the dynamic uniform load coefficient according to the dynamic meshing force root-mean-square values and the average values obtained at the tooth roots of the face gear and the planetary gear. By testing and analyzing the dynamic uniform load coefficient, the load distribution characteristic of the face gear planetary transmission system can be accurately revealed, a scientific basis is provided for structural parameter optimization, meshing performance improvement and reliability design of the face gear planetary transmission system, and then accurate and high-performance design of the transmission system is achieved.

The utility model relates to a periodic modification structure of a reciprocating mechanical transmission gear, which comprises a transmission gear, a non-meshing surface of the transmission gear is modified to form a meshing clearance, and the meshing surface is gapless. The gear backlash on the meshing side of the gear is eliminated to prevent the gear from being knocked in the return stroke due to the alternate change of positive and negative torque, the non-meshing side is shaped to form the backlash to prevent the interference seizure phenomenon in the gear transmission process, and the gear transmission can achieve the states of more stable operation and lower vibration noise after being changed. The transmission gear is especially suitable for transmission gears of piston connecting rod reciprocating motion machines such as Stirling engines and diesel engines.

A first sliding rail and a second sliding rail are arranged in a wheel rim of the steering wheel, a motor and a gear transmission mechanism are arranged in a steering column of the steering wheel, and one end of a first sliding sleeve structure and one end of a second sliding sleeve structure are connected with the output end of the gear transmission mechanism; the tail ends, located in the steering wheel rim, of the first sliding sleeve structure and the second sliding sleeve structure are provided with a first supporting tool and a second supporting tool respectively. The gear transmission mechanism is driven by the motor to rotate, then the first sliding sleeve structure and the second sliding sleeve structure are driven to slide on the first sliding rail and the second sliding rail correspondingly, when sliding to the tail ends of the sliding rails, the first supporting tool and the second supporting tool can be pushed out to a steering wheel rim, and the supporting tools increase an acting point for the palm; and the problem of unstable holding caused by incomplete thumb tail joint and insufficient thumb strength of a driver is solved.

The invention discloses a bevel angle transmission marine gear transmission device, which relates to the technical field of gear transmission, and comprises a box body, an input component, a transmission component and an output component, an ahead running transmission gear is fixed to an input shaft of the input component, and an ahead running driving gear with a clutch and a piston is installed on the input shaft in an empty sleeving mode. And a reversing transmission gear is fixed on a transmission shaft of the transmission part. The invention belongs to the breakthrough of the prior art, and can meet the requirements of inclination of an input shaft, a reversing shaft and an output shaft of a gear box by utilizing the displacement principle of gears with different center distances and the meshing transmission principle of crossed shaft gears. Gears on the three shafts can be mutually meshed and effectively work, the requirement that the high-speed boat inclines relative to the water surface when advancing on the water at a high speed is met, the diesel engine and the gear box are horizontally arranged in the cabin, the output shaft of the gear box outputs at a certain oblique angle, the structure is reliable, the process is easy to implement, and the high-speed boat has the advantages of being reasonable and compact in structural arrangement, high in transmission efficiency, low in cost and the like. And the weight is light.

The invention discloses a lifting device and method for storage and transfer of an airship pod, and relates to the technical field of storage and transfer of airship pods.The lifting device comprises an upper bracket, two lifting driving assemblies, a middle support, a damping spring, a base, four wheels and a traction rod; through the modular truss structure design, the bearing capacity and the lightweight requirement are both considered; a multi-dimensional vibration reduction system is formed by the vibration reduction springs which are arranged horizontally, longitudinally and transversely and the soft rubber buffer cushion, and the structure and function integrity of the pod in the storage and transfer process can be effectively protected by matching with the flexible moving and locking functions of the universal wheels with brakes; the lifting driving assembly adopts worm and gear transmission to achieve stable lifting and + / -15-degree pitch angle adjustment, an operating hand wheel designed in an ergonomic mode is combined, electric drive is matched, and the requirement for precise adjustment and control of pods is met. And the operation efficiency is greatly improved through the quick disassembly and assembly design of the positioning and fixing assembly and the traction rod.

The invention discloses a longitudinal tension test load device for a super-tonnage lifting hook and a test method.The longitudinal tension test load device comprises a foundation bearing platform, a load test cabin is arranged on the top face of the foundation bearing platform, and a plurality of lifting lugs used for lifting are fixedly installed on the top face of the load test cabin; a servo driving motor, a precise ball screw, a longitudinal sliding base, a main loading hydraulic cylinder, an adjustable supporting frame, a sliding type bearing frame, a main locking connecting rod, a connecting rod supporting frame, a gear transmission block, a fan-shaped meshing gear, a driven connecting rod mechanism, a self-adaptive clamping module, a lateral mounting flange and a self-locking limiting plate are matched with one another; the position of the adjustable supporting frame on the hook claw can be adjusted for multiple tests, the industrial endoscope can detect cracks on the surface of the hook in the test process, the laser displacement sensor can monitor deformation of the claw, a worker detects flaws of the hook through the ultrasonic flaw detector, and the test effect on the hook is achieved.

The utility model discloses an electromagnetic double clutch type power mechanism, which comprises a motor and an electromagnetic transmission mechanism, the structure of the electromagnetic transmission mechanism comprises a fixing ring, two electromagnetic coils are arranged on the fixing ring in parallel, an armature is fixedly arranged on the outer side of each of two opposite ends in the axial direction of the fixing ring, and a clutch outer core is axially fixed with the fixing ring. A fast-gear clutch assembly and a slow-gear clutch assembly are arranged in the clutch outer core side by side in a circumferential transmission mode, and an inner shifting structure acting on the fast-gear clutch assembly and the slow-gear clutch assembly is arranged in the clutch outer core. A fast gear and slow gear transmission set in transmission connection with the transmission shaft is arranged in the clutch outer core and used for achieving fast gear and slow gear switching transmission. And the electromagnetic force of the two electromagnetic coils realizes the axial sliding of the clutch outer core, so that the fast-gear clutch assembly and the slow-gear clutch assembly are staggered for separation and reunion.

The invention relates to the technical field of tunnel construction equipment, and discloses compact grouting equipment for tunnel construction, which comprises a tunnel vehicle, a storage barrel and a stirring barrel system, by arranging a linkage structure of the distribution part and the stirring driving part, when a screw rod in an auger shell is used for conveying materials, meshing transmission of a main gear and an N ring is synchronously driven, a stirring rod in a storage barrel and a stirring barrel disturbing plate magnetically connected with the stirring rod are driven to conduct bidirectional stirring, and cooperative driving of automatic material matching and conveying and stirring power is achieved. The dredging part is linked with an elastic rod through an electric rod to form an elastic knocking mechanism, and cooperates with an inclined push plate to drive a hammer rod to perform reciprocating impact on the connecting pipe, so that slurry solidification and blockage are effectively prevented. The equipment innovatively adopts a gear transmission and magnetic linkage technology, realizes integration of functions of material delivery, stirring disturbance and pipeline dredging while removing a traditional stirring motor, remarkably reduces the overall height of the equipment, improves the trafficability of a narrow tunnel working condition, and ensures the accuracy of mortar proportioning.

The invention relates to a hybrid speed reduction transmission equatorial telescope based on a crossed roller bearing. The equatorial telescope comprises a shell, a right ascension axis hybrid speed reduction transmission assembly, a declination axis speed reduction transmission assembly, the crossed roller bearing, a laser beam parallelism adjusting mechanism and a base. The right ascension shaft mixed speed reduction transmission assembly comprises a right ascension shaft motor, a right ascension first-stage speed reducer and a right ascension second-stage speed reducer, the right ascension first-stage speed reducer is a harmonic speed reducer, and the right ascension second-stage speed reducer is a worm and gear transmission pair; the declination axis speed reduction transmission assembly comprises a declination axis motor and a declination axis speed reducer; an outer ring of the crossed roller bearing is fixed on the rear shell, one end face of an inner ring is fixed with the output end of the right ascension shaft mixed speed reduction transmission assembly, and the other end face of the inner ring is fixed with the right ascension shaft output seat; and the declination shaft speed reduction transmission assembly is fixed on the right ascension shaft output seat. The equatorial telescope has the advantages of being high in degree of freedom, small in size, light in weight and high in bearing capacity, and the equatorial telescope is high in reduction ratio, stable in tracking, high in tracking precision and low in power consumption.

The invention discloses an anti-backlash control method and device for a dual-motor driving gear system, and relates to the technical field of servo control, and the method comprises the steps: obtaining the information of the dual-motor driving gear system, obtaining the reference position information of a large gear and the actual position information of the large gear based on the dual-motor driving gear system, and according to the reference position information and the actual position information of the bull gear, based on torque coupling compensation, obtaining a backlash-canceling bias current. Through cooperative control of the two motors, torque deviation is compensated in real time, the return difference problem in gear transmission can be effectively eliminated, a torque coupling compensation control algorithm based on speed deviation can quickly respond to load change and motion state switching, it is ensured that the system is still kept stable under the high-dynamic condition, and the stability of the system is improved. And a torque balance mechanism of dual-motor cooperative work improves the stability and anti-interference capability of the system, and meets the precision transmission requirements under complex working conditions.

The invention discloses a self-lubricating combined type planetary gear transmission mechanism. The self-lubricating combined type planetary gear transmission mechanism comprises a planet carrier, an eccentric sun gear, a rotating shaft, a planetary gear and a self-lubricating assembly, and the self-lubricating assembly comprises a lubricating part and a control part connected with the rotating shaft; the lubricating part comprises an annular fixing plate, an annular extrusion air bag connected with the inner surface of the annular fixing plate, an annular expansion air bag connected with the outer surface of the annular fixing plate and a lubricating column penetrating through the planet carrier. When the rotating shaft drives the planetary gear to start to work, the control part drives the push plate to move to extrude the annular extrusion air bag, so that air is pressed into the annular expansion air bag and expands, lubricating oil flows out of the oil discharge hole to the meshing part of the planetary gear and the eccentric sun gear, and comprehensive lubrication is achieved. The whole lubricating process is automatically started along with rotation of the rotating shaft, manual inspection or manual lubrication is not needed, it is guaranteed that all parts are fully lubricated, and use is extremely convenient.

The invention discloses an anti-shaking device and method for hoisting an unmanned aerial vehicle, and belongs to the technical field of unmanned aerial vehicle hoisting operation. The device comprises a mounting plate and a fixing shell fixed to the bottom of the mounting plate, and a mounting shell is arranged on the mounting plate. The innovative point is that a passive stabilizing system composed of a wind guide mechanism, a wind power conversion mechanism and a gyro mechanism and an active adjusting system composed of an adjusting mechanism and a reverse thrust stabilizing system are integrated. The air guide mechanism guides airflow to drive a rotating column of the wind power conversion mechanism to rotate, a gyro disc is driven to rotate at a high speed through multi-stage gear transmission acceleration, and the posture of goods is passively stabilized through the generated gyroscopic effect. Meanwhile, the adjusting mechanism adapts to posture changes of the unmanned aerial vehicle by adjusting the length of a hoisting steel cable, and the reverse thrust stabilizing system actively counteracts wind disturbance through vector air injection. The invention further provides a corresponding anti-shaking method. According to the scheme, swinging of hoisted goods in the high altitude can be restrained, the posture stability and the wind resistance are improved, and the automatic unloading function is achieved.

The invention discloses a spatial gear transmission system reliability evaluation method fusing failure physics and degradation data, and belongs to the technical field of mechanical reliability engineering and fault prediction. The method aims to solve the problem of reliability evaluation of the spatial gear transmission system under the conditions of extreme environment, small sample, multi-failure mode coupling and significant individual difference. The method comprises the following steps: firstly, establishing a gear dynamics model considering nonlinear excitation to obtain dynamic meshing force; then, respectively constructing wear and fatigue degradation models based on failure physics; then, introducing an inverse Gaussian random process considering individual differences to carry out single failure mode reliability modeling; and finally, a Copula function is utilized to construct a binary correlation competition failure model, and system-level reliability comprehensive evaluation is realized. Through the technical route of physical mechanism driving, uncertainty quantification and data statistics fusion, a complete evaluation system is formed, and key technical support is provided for on-orbit health management and life prediction of the space gear transmission system.

The invention discloses a collaborative design method and device for a gear transmission system facing a marine environment, and relates to the field of mechanical design, and the method comprises the steps: obtaining the working depth of the gear transmission system in the marine environment, and calculating the environmental parameters of the ocean based on the depth and a first relation; state parameters of lubricating oil used in the gear transmission system are calculated according to the environment parameters and the second relation; selecting an initial gear material from a material performance parameter database according to the state parameters of the lubricating oil and the environmental parameters of the ocean; selecting an initial configuration in the configuration database according to the design requirement of the gear transmission system; and taking the initial gear material and the initial configuration as initial conditions, inputting the gear material and the configuration into a coupling performance prediction model to predict and obtain a performance index, and carrying out iterative solution on an objective function by adopting a multi-objective optimization algorithm under constraint conditions to obtain the optimal gear material and configuration. The method overcomes the limitation of a traditional separated design, and can capture a complex coupling relationship.

The invention discloses a wear-resistant coating for an automobile balance shaft gear set and a preparation method thereof, and the wear-resistant coating comprises the following components by weight: 500-2000 parts of an organic solvent, 300-520 parts of polymer resin, 18-126 parts of a lubricating phase, 0-50 parts of a reinforcing phase, 15-60 parts of an auxiliary agent, and 1-4 parts of a pigment filler. The preparation method comprises the following steps: adding the modified lubricating phase into the organic solvent to prepare a mixed solution, adding the mixed solution and other components into a ball milling tank, and carrying out filtering and vacuum defoaming after ball milling to obtain the high-molecular wear-resistant coating. And spraying the wear-resistant coating on the gear, and carrying out third-order curing to obtain a gear product coated with the macromolecular wear-resistant coating. The wear-resistant coating prepared by the invention has excellent wear resistance and damping characteristic, can buffer the impact force of gear transmission, improves the knocking noise problem in the gear operation process, and improves the NVH performance of the whole gear.

The device for longitudinal conveying of the special-shaped steel rails is provided with a fixed base, the fixed base is in sliding connection with a translation base, and the translation base is driven by a gear transmission mechanism to translate; a vertically-downward lifting hydraulic cylinder is installed at the top end of the translation base, and the execution tail end of the lifting hydraulic cylinder is fixedly connected with the lifting base and drives the lifting base to ascend and descend. The lifting base is provided with a clamping hydraulic cylinder, and the execution tail end of the clamping hydraulic cylinder is connected with the clamping jaw through a connecting rod and drives the clamping jaw to execute opening and closing actions. The mode that the steel rail is clamped, lifted and then conveyed in a translation mode is adopted, the technical problem that due to the fact that the height difference exists between the profiled end of the special-shaped steel rail and the rail bottom of a raw material section, translation conveying and discharging are difficult to achieve on a roller way after saw cutting is solved, the structure is simple and compact, and clamping and conveying are stable and reliable.

The invention provides a return difference measuring method and device of a gear transmission mechanism in a motor driving system. According to the return difference measurement method, the return difference measurement value is indirectly determined by identifying the critical point that the gear transmission mechanism starts to respond to the driving signal, the critical point marks that the gear transmission mechanism completes the change from the idle stroke state to the effective transmission state, and the return difference measurement value is calculated based on the position data before the critical point. The return difference measurement value is a comprehensive index which contains the comprehensive influence of the gear backlash, the elastic deformation of the transmission shaft and the static friction force and reflects the overall transmission performance of the system, so that the return difference measurement value which reflects the overall transmission performance of the system and is real and comprehensive is obtained through measurement according to the technical scheme of the invention. According to the method, the transmission lag characteristic of the system under the actual working condition can be represented more accurately, and a more reliable data basis is provided for subsequent high-precision motion control.

The present invention provides a method, structure and application of power transmission based on aerodynamic deceleration, which relates to the field of aviation technology, and in particular to rotorcraft technology. A method of power transmission based on aerodynamic deceleration, in which the airflow generated by the rotation of a powered small rotor drives the rotation of an unpowered large rotor; a rotor drive structure based on aerodynamic deceleration power transmission, comprising a large rotor and a small rotor, a main shaft and a power drive assembly; the large rotor is rotatably connected to the main shaft, and the large rotor rotates around the main shaft; the small rotor is connected to the power drive assembly. The benefit of the present invention is at least that part of the energy of the small rotor is transmitted to the large rotor in an aerodynamic manner, solving the problem that the pre-rotation of traditional autogyro aircraft uses a soft shaft or motor acceleration and deceleration gear transmission, which is complex in structure and has a high failure rate. It has the advantages of variable speed and strong adaptability, and is not easy to burn the engine due to overload.

The invention discloses a cooling and lubricating system and method for a coaxial electric drive planetary gear reducer, the cooling and lubricating system comprises a system shell and a shafting transmission mechanism arranged in the system shell, and the shafting transmission mechanism comprises a planetary gear transmission mechanism and a differential mechanism transmission mechanism; a lubricating oil inlet mechanism is fixed to the system shell, and a shell oil channel is formed in the system shell. An oil spraying pipe is fixed in the system shell, and the shell oil channel comprises a cooling oil channel which is communicated with an oil outlet of the lubricating oil inlet mechanism and can guide lubricating oil into the oil spraying pipe. Oil spraying holes facing the planetary gear transmission mechanism and the differential mechanism transmission mechanism are formed in the oil spraying pipe. The independent oil spraying pipe is designed, a plurality of oil spraying holes which have different oil spraying angles and aim at a sun gear, a planetary gear set and a differential mechanism are designed in the oil spraying pipe, and oil is actively conveyed to friction pair meshing positions of the sun gear, the planetary gear set, the differential mechanism and the like for lubricating and cooling.

The invention discloses an engine cylinder block production line, and relates to the field of engine manufacturing. An engine cylinder block production line comprises a base and further comprises fixing plates symmetrically connected to the two ends of the base in a sliding mode. The clamping air bag is arranged on the fixing plate; the clamping air bag expands to clamp the cylinder body, can adapt to cylinder bodies in different shapes, and is stable and free of damage; an electric telescopic rod drives a grinding and polishing block to reciprocate up and down in a piston cavity to increase grinding comprehensiveness, gear transmission ensures that a rotating shaft rotates stably and controllably to achieve uniform and high-quality grinding, and a spring can respond to shape changes of the inner wall of the piston cavity in time to ensure that the grinding and polishing block always makes close contact so as to improve quality. And meanwhile, redundant air of the clamping air bag enters the sleeve through the channel and then is sprayed out of the air nozzle to blow away chippings, the grinding precision is prevented from being affected, high pressure in the sleeve can prevent the grinding and polishing block from being separated from the inner wall due to insufficient centrifugal force, continuous and effective grinding is guaranteed, and the working efficiency and grinding quality are overall improved.

The invention discloses a high-power petroleum fracturing truck transmission system which comprises a torque converter and a gearbox which are integrated, and the gearbox is of a fixed shaft and planet structure. The torque converter comprises a shell a, a torque conversion mechanism is arranged in the shell a, and the torque conversion mechanism is connected with an input assembly; the gearbox comprises a shell b, the shell b is fixedly connected with the shell a, a parallel shaft transmission system in transmission connection with the output end of the torque conversion mechanism and a planet wheel transmission system in transmission connection with the output end of the parallel shaft transmission system are arranged in the shell b, and the output end of the planet wheel transmission system is connected with the output assembly; the gear of the parallel shaft transmission system is three, the gear of the planet wheel transmission system is three, and the gear of the parallel shaft transmission system is nine. The advantages of fixed shaft transmission and planetary transmission are combined, balance is carried out, the reliability is high, meanwhile, the weight can be reduced, and the transmitted torque can be improved. And the torque converter and the gearbox are integrally arranged, so that the overall size is reduced, and the mounting space is saved.

A self-aligning gear includes a toothed ring gear having inner gear teeth alternating with inner grooves on an inner circumference and outer gear teeth on an outer circumference, a spline gear having spline teeth alternating with spline grooves on an outer circumference, wherein the spline teeth fit in the inner grooves of the toothed ring gear, and a curved-faces pin assembly including a cylindrical pin having semicircular ends and an elastomeric material pattern which conforms to the shape of the spline grooves and inner grooves. The grooves have either trapezoidal walls or semicylindrical walls. The self-aligning gear also includes a locking assembly with a flanged hub and threaded disc to secure the components. The elastomeric material provides alignment compensation through controlled deformation while maintaining torque transfer capability. The self-aligning gear compensates for misalignment in gear transmissions, extending operational life while maintaining power transmission efficiency.

The casting device for the automobile metal part comprises a supporting seat and a casting mechanism arranged on one side of the supporting seat, a rotating disc is rotationally installed in the middle of the upper end of the supporting seat, and four connecting plates are installed on the circumference of the rotating disc at equal intervals. The four-station circulating design is adopted, the mold is driven by the rotating disc to sequentially pass through the casting station, the cooling station, the demolding station and the resetting station, all the stations operate synchronously, seamless connection in space and continuous operation in time are achieved, and the continuous casting machine is suitable for large-scale continuous casting of automobile parts; a bevel structure of the conversion assembly drives a rack to drive a mold to turn over, a first triangular block and a second triangular block are designed in an interlocking mode, the rack is forced to generate high-frequency micro-amplitude up-and-down motion at a demolding station, the motion is converted into slight shaking of the mold through gear transmission, a casting can be effectively shaken to be loose, it is ensured that a metal part can be thoroughly and losslessly separated from a cavity, and the mold is prevented from being damaged. And automatic demolding is realized.

The invention discloses a space manipulator joint electromechanical transmission system design and optimization method, which belongs to the technical field of machine manufacturing, and comprises the following steps: obtaining the initial design of macrostructure parameters of parts based on the design requirements of a key electromechanical transmission system; constructing a performance parameter calculation model of the electromechanical transmission system based on the initial design of the macrostructure parameters of the parts; an electromechanical transmission system optimization model is established based on the performance parameter calculation model of the electromechanical transmission system, optimal motor structure parameters are obtained based on the electromechanical transmission system optimization model, and optimal planetary gear transmission system structure parameters are obtained based on the optimal motor structure parameters. According to the method, an efficient, light and safe joint electromechanical transmission system scheme can be effectively designed in an assisting manner, the limitation that a space manipulator joint electromechanical transmission system is low in transmission efficiency and safety and light weight is difficult to consider under the characteristics of multiple power sources, multi-stage transmission, large transmission ratio and the like is eliminated, and reliable support is provided for future space exploration and satellite application.

The invention discloses a steering engine transmission mechanism, and relates to the technical field of ship steering engines, and the steering engine transmission mechanism comprises a mounting base, a rotating disc, an electric drive steering mechanism, a detection mechanism and a hydraulic drive buffer mechanism; the steering engine shaft has the advantages of being reasonable and simple in structure and low in production cost, stable steering of the steering engine shaft can be achieved through cooperation of the electric drive steering mechanism and the hydraulic drive buffering mechanism, different steering requirements in ship navigation are met, and reliability and safety in the steering process can be ensured; steering driving of the steering engine shaft is achieved through the speed reduction motor with a brake and a specific transmission structure, meanwhile, the hydraulic drive buffering mechanism can provide effective buffering, the situation that steering impact is too large is avoided, and the requirements for steering precision and stability of a ship under various sea conditions can be met; according to the system, ship steering can be independently achieved when the electric drive steering mechanism or the hydraulic drive buffering mechanism is abnormal, the good fault-tolerant capability is achieved, large-amplitude steering can be achieved through linkage of the electric drive steering mechanism and the hydraulic drive buffering mechanism, and the safety and reliability of ship navigation are further guaranteed.

The invention discloses an unmanned aerial vehicle parachute throwing device, and belongs to the technical field of unmanned aerial vehicle equipment. Comprising a fault detection module, a trigger control module, a dual-power release module, a parachute storage module, a flight control cooperation module and a parachute ejection mechanism which are installed in an unmanned aerial vehicle body. A fault judgment algorithm is built in the trigger control module; the parachute ejection mechanism comprises an ejection shaft, the lower end of the ejection shaft is connected with a force storage assembly, the ejection shaft is sleeved with a limiting protruding ring, and a limiting column is arranged on one side of the limiting protruding ring and matched with the motor driving unit. The three-axis acceleration sensor, the air pressure sensor, the motor rotating speed sensor and the current sensor are integrated, a synchronous acquisition and automatic switching mechanism of the main sensor and the standby sensor is matched, acquisition interruption caused by faults of a single sensor is avoided, and data acquisition continuity is high. Instantaneous impact force is provided through compressed gas driving, the push rod is driven to be accurately unlocked through gear transmission, and the problems that traditional single power thrust is insufficient and release is slow are solved in cooperation with the double-spring force storage assembly.

The invention provides a real-time lubrication control method and device for a gear transmission system. The method comprises the steps that multi-dimensional collection is conducted on operation state parameters of a gear pair, and a working condition state data set is generated; determining shear rate distribution data and oil film thickness distribution data of the lubrication contact area according to the working condition state data set; inputting the obtained data into a neural network model, and performing joint prediction on the oil film rigidity and the tooth surface friction coefficient of the lubrication contact area to generate a joint prediction result; according to the joint prediction result, whether the gear pair lubrication strategy meets the safe operation requirement or not is judged, and a corresponding lubrication level is generated; and performing differential treatment on the oil film rigidity and the tooth surface friction coefficient according to the lubrication grade, determining a lubrication offset parameter, and performing self-adaptive adjustment on the lubrication control parameter according to the lubrication offset parameter. According to the scheme, the lubrication parameters are adjusted in time according to the joint prediction result, and precise adjustment and optimization of the gear lubrication state under the high-load and high-speed working condition are achieved.

The invention relates to the field of cutting devices, in particular to a cutting device for bus duct shell machining. Comprising a workbench, an electric saw driven by a pneumatic sliding table, a positioning mechanism, a top plate triggering system and a splash-proof mechanism. The positioning mechanism adjusts the distance between conical rubber wheels through a two-way lead screw, achieves rotation guiding of the conical rubber wheels through bevel gear transmission and is matched with an air cylinder ejector block to complete accurate positioning and clamping of the shell; the top plate and the touch pressure sensor are linked to trigger an automatic process; the splash-proof mechanism drives a baffle through a double-shaft motor to form closed protection, and an air pump blows air to be matched with penetrating holes to collect chippings. The device can automatically adapt to shells with different widths, and automation of the whole process from guiding positioning, clamping and cutting to scrap collection is achieved. The device has the advantages of being high in positioning precision, comprehensive in protection, efficient in scrap collection and the like, effectively improves the efficiency and safety of bus duct shell cutting, and is suitable for diversified production requirements.

The invention belongs to the technical field of river model topographic survey, and provides an automatic river model topographic survey device and system.The automatic river model topographic survey device comprises a track, a moving trolley is arranged on the track and comprises a base, two connecting shafts are symmetrically and rotationally connected to the bottom of the base, and a double-shaft driving motor is arranged on the connecting shaft at one end; wheels are fixedly connected to the two ends of the two connecting shafts, a storage battery is arranged at the bottom of the base, and an adjusting assembly is arranged on the base. The mobile trolley accurately moves along the track through the double-shaft driving motor, the whole range of the model can be covered, the rotating holder achieves 360-degree horizontal rotation through worm and gear transmission, the river model can be scanned in an all-around mode, it is ensured that no measurement dead angle exists, and the lifting component adjusts the height of the three-dimensional laser scanning head through lead screw transmission. The device adapts to terrains of different depths, transmission of all parts is stable, manual intervention is not needed, the model measurement time is short, and efficiency and data reliability are greatly improved.