1898 results about "Mechanical drive" patented technology

The invention discloses a mechanical transmission system fault trend prediction system based on dynamic feature recognition, and relates to the technical field of mechanical state monitoring. Comprising the following steps: synchronously acquiring a load torque signal and a lubrication state parameter signal of a transmission system and vibration acceleration signals of a plurality of measuring points through a signal acquisition module; the working condition decoupling characteristic generation module carries out time-frequency analysis on the vibration signal, calls a pre-stored load disturbance spectrum template according to a load torque signal to carry out adaptive differential processing so as to eliminate load fluctuation interference, and calls a correction rule set according to a lubrication state parameter signal to carry out form recombination on the signal so as to compensate the lubrication state influence; and finally outputting a working condition decoupling feature representing the health state of the mechanical part. And the trend prediction module calculates and obtains fault development trend and residual life estimation data through a pre-trained fault prediction model. According to the method, the dynamic characteristics representing the essential degradation of the part are effectively extracted, and the accuracy and reliability of fault trend prediction of the mechanical transmission system are improved.

The invention relates to the technical field of fireproof equipment, in particular to an electrically-driven translation type heavy fireproof door which comprises a door body, a driving mechanism and a translation mechanism. The translation mechanism comprises a translation base and a nut sleeve, a mounting hole and a guide hole which penetrate through the two sides of the translation base are formed in the translation base, the nut sleeve and the lead screw form a thread transmission pair, the nut sleeve is rotatably mounted in the mounting hole, the guide rod is slidably connected in the guide hole, and a synchronous assembly is arranged in the translation base; when the door body moves to the tail end of the stroke, the circumferential constraint of the synchronous assembly on the nut sleeve is automatically relieved, so that the nut sleeve can freely rotate relative to the translation base. Therefore, the motor and the transmission system do not need to overcome the huge inertia of the door body to achieve forced stopping, the instantaneous load and locked-rotor risk of the motor are remarkably reduced, and meanwhile the impact stress borne by a mechanical transmission part at the terminal is greatly relieved.

The present invention relates to a microscope comprising a light source, an illumination beam path for guiding excitation light to a sample, a detector for detecting emission light emitted by a sample, a detection beam path with a microscope objective for guiding the emission light to the detector, a mechanical drive for setting a relative lateral position between the sample and the microscope objective, and a control unit.The microscope is characterized in that the control unit is configured to perform a setting step, wherein the mechanical drive is sequentially adjusted to at least three different relative lateral positions; a detection step, wherein measurement data from the detector are acquired for at least a subset of points in the sample within a field of view of the detection beam path, wherein for each point of the subset measurement data are acquired for at least two different lateral positions of the mechanical drive; and an evaluation step, wherein field inhomogeneity in the field of view and microscopic sample information are extracted from the measurement data. In further aspects, the invention relates to a method for determining field inhomogeneity in a field of view of a microscope and to a microscopy method.

The invention belongs to the technical field of wearable exoskeletons, and particularly relates to a forearm power assisting device, a forearm power assisting method and an upper limb power assisting system. The forearm power assisting device comprises an angle transmission mechanism, an angle amplification mechanism, an elastic energy storage mechanism and a tension output mechanism; wherein the buckling angle of the front arm is transmitted through the angle transmission mechanism, and after the buckling angle is amplified through the angle amplification mechanism, the elastic energy storage mechanism is driven, so that the flexible traction cable outputs pulling force linked with the buckling angle of the front arm. The forearm power assisting device is a system based on the pure mechanical transmission and energy storage principle, forearm flexion and extension angle changes can be directly converted into self-adaptive tension linked with the forearm flexion and extension angle changes, and therefore forearm muscle fatigue in long-time fine operation can be effectively relieved without an external power source.

The invention discloses a gear pair life prediction method based on dynamic stress, belongs to the technical field of reliability design of mechanical transmission systems, and aims to solve the problem of inaccurate life prediction caused by neglecting a dynamic effect and a real surface topography in an existing gear design method. The method comprises the following steps: firstly, acquiring gear pair interface mechanical property parameters considering shafting vibration, dynamic load and surface roughness, wherein the parameters comprise transient oil film pressure, friction coefficient, oil film thickness and shear stress; solving a three-dimensional subsurface stress field by adopting an algorithm and calculating von Mises equivalent stress distribution; stress volume integration is conducted on different rough surfaces, the honed surface is used as the reference, the relative fatigue life of other surfaces is calculated based on the Zaretsky life prediction theory, and accurate prediction and process optimization of the contact fatigue life are achieved; meanwhile, the dynamic bending stress of the tooth root is calculated based on the dynamic normal load, and the bending fatigue safety coefficient is checked.

The invention provides a silk fabric take-up and pay-off device, and relates to the technical field of textile machinery. The device comprises a supporting frame, a winding disc, a magnetic rotating assembly and an electromagnetic driving assembly, the winding disc and the magnetic rotating assembly are coaxially and fixedly connected to the supporting frame through a center rotating shaft, and the electromagnetic driving assembly generates an alternating magnetic field to drive the magnetic rotating assembly to rotate. According to the scheme, non-contact electromagnetic driving is adopted to replace traditional mechanical transmission, the abrasion problem caused by physical contact is avoided, the operation stability and the start-stop response speed are improved, meanwhile, vibration noise is reduced, the maintenance process is simplified, and the device is suitable for efficient winding and unwinding operation in silk fabric production.

The invention discloses a heavy truck power split hybrid system assembly and a control method thereof.The heavy truck power split hybrid system assembly is provided with an engine, an engine input shaft is axially arranged on the engine, and a clutch is connected to the engine input shaft; the planet row is provided with a sun gear, a gear ring and a planet carrier, and an engine input shaft is connected to the planet carrier connected with the planet row; the generator is connected with the sun gear of the planet row; the motor is connected to a gear ring of the planet row, and the output of the gear ring is connected with the gearbox; according to the heavy truck power split hybrid power system assembly and the control method thereof, dual motors, a planet row and a few-gear AMT gearbox are integrated, and according to a power split mode, the power of an engine drives a vehicle through mechanical transmission and electric transmission paths; compared with a traditional commercial vehicle power assembly framework, the new energy power assembly framework has the advantages of being high in comfort, less in power interruption, efficient and oil-saving.

The invention relates to the technical field of precision spring manufacturing and automatic control, in particular to a spring forming online control system and method. The system comprises a dynamic modeling module, a disturbance observation module, an impedance decoupling module and a trajectory correction module. The system calculates disturbance torque by constructing a mechanical transmission dynamics reference model and collecting servo parameters; the core of the method is to decouple a material deformation impedance component representing transient rheological characteristics of a wire rod from a disturbance torque, generate a position correction instruction based on an elastic-plastic compensation model, and dynamically adjust a forming track in a current period; according to the invention, the servo motor is multiplexed as a virtual probe, the hysteresis of visual detection is eliminated, the strength fluctuation of the wire rod can be effectively handled, and the product consistency is obviously improved.

The invention relates to the technical field of industrial equipment control, and discloses a dynamic maintenance management method and system based on the full life cycle of test equipment, and the method comprises the steps: obtaining a time domain vibration signal and torque current data during the operation of the equipment through a high-frequency vibration sensor and a current loop feedback interface; calculating an accumulated damage gradient parameter representing the physical recession degree of the mechanical transmission chain; the parameters are input into a preset damage stress coupling model to solve the maximum radial impact force allowed to be borne by the damaged part, and the impact force is mapped into a dynamic capability boundary for carrying out logic constraint on the motion planning instruction; and the motion controller reconstructs an ideal speed curve by using the boundary in an interpolation period, and reshapes a torque load spectrum output to a servo motor by reducing the jump of acceleration and deceleration sections. The problem that an existing static control strategy is mismatched with the dynamic aging characteristic of equipment is solved.

The invention relates to the technical field of gas machinery, and discloses a pressurizing energy-saving centrifugal fan which comprises a limiting ring, a driving motor is fixedly connected into the limiting ring, an impeller frame is fixedly arranged at the output end of the driving motor, and fan blades are arranged in the impeller frame. A protection assembly and a transmission assembly are arranged on the outer wall of the impeller frame, a friction plate is fixedly connected to the outer wall of the transmission assembly, a circular gear is arranged on the outer wall of the friction plate, an annular rack is connected to the tooth end of the circular gear in a meshed mode, and a connecting frame is fixedly connected to the outer wall of the annular rack. Through the linkage design that a driving motor drives an impeller frame to be in linkage with a first bevel gear and a second bevel gear, in combination with mechanical transmission of a friction plate, a circular gear and an annular rack, automatic adjustment of the size of an air inlet of an air inlet pipe is achieved, opening and closing of a flow guide plate can be adjusted in real time according to the rotating speed of an impeller, the air inlet amount and air pressure are optimized, and turbulence losses are effectively reduced; and the working efficiency and performance of the fan are improved.

A high-precision leveling apparatus, comprising a leveling base plate (3), a driving assembly (8), and a transmission assembly (9). The driving assembly (8) is connected to the leveling base plate (3) by means of the transmission assembly (9), and adjusts the height of the leveling base plate (3). The driving assembly (8) comprises a rigid base (8-2), and a ball screw (8-5) arranged on the rigid base (8-2) along a first direction, wherein the ball screw (8-5) is movably provided with a rigid support piece (8-4), and on the basis of the ball screw (8-5) and the rigid support piece (8-4), the rotation stroke of the ball screw (8-5) is converted into displacement of the height of a support surface of the rigid support piece (8-4), thereby ensuring the accuracy of the rotation process of the ball screw (8-5). A return gap between the rigid support piece (8-4) and the ball screw (8-5) is eliminated by means of stretch assemblies (8-7), thereby ensuring the support stability after the rigid support piece (8-4) is in place, and ensuring the accuracy and controllability of the displacement of the rigid support piece (8-4). A plurality of displacement detection apparatuses (8-1, 8-8, 8-9) are used to accurately monitor the displacement of the rigid support piece (8-4). A mechanical transmission-type active leveling solution is used to ensure the stability and reliability after leveling, and various measures are also used to eliminate errors in the mechanical transmission process, thereby ensuring the adjustment accuracy of the leveling apparatus. Also disclosed are a high-precision leveling platform, and a leveling method.

A combined seeder for full straw mulching condition operation includes a frame, where a seeding and fertilizing mechanism is arranged above the frame, a pre-sowing pressing mechanism is arranged below the frame, a mechanical transmission mechanism is arranged in the middle of the frame, the two ends of the mechanical transmission mechanism are respectively connected with the furrowing mechanism and the vertical rotary tillage mechanism, the vertical rotary tillage mechanism is arranged in front of the frame, and the furrowing mechanism and a seeding profiling mechanism are arranged behind the frame. Th combined seeder for full straw mulching condition operation can complete the strip vertical rotation, crushed soil leveling, side deep fertilization, pre-sowing suppression, strip monomer profiling sowing in clean areas, and other processes in one operation under the full straw mulching condition, which greatly improves the operation efficiency and alleviates the problem of the tension of crop rotation.

The invention discloses a single-motor steering wheel force feedback simulation system and method, and relates to the technical field of automobile simulation driving. The defects in the prior art are overcome. The system comprises a simulation control module, a vehicle state acquisition module, a transmission module, a single-motor driving module and a control unit, wherein the simulation control module is used for acquiring steering wheel angle information; the vehicle state acquisition module is used for receiving real-time state data of a virtual vehicle in a simulation environment; the transmission module is used for converting one-way rotary motion of a motor into multi-dimensional force feedback acting on a steering wheel; the method comprises the following steps: acquiring a steering wheel angle theta and running state data of a virtual vehicle in real time; the mechanical response is delayed as lt; 10ms, the road sense is very real; the pure mechanical transmission path is high in efficiency, only one motor is used, and the peak power consumption is far lower than that of a multi-motor system; the performance of the system does not depend on an extremely complex real-time algorithm or an intelligent material sensitive to temperature, the anti-interference capability is high, and the service life is long.

The invention discloses a novel cross-country forklift, which relates to the technical field of hydraulic hybrid power systems of engineering machinery and comprises the following modules: a power module for providing driving power of the whole forklift; the power division module is used for realizing double-flow power division and convergence and comprises an integrated mechanical gear speed change unit and a hydraulic stepless speed change unit; the mechanical transmission module is used for transmitting the power of the mechanical direct drive branch to the drive part; the hydraulic execution module is used for realizing a dynamic characteristic cooperative control technology and matching the flow of a hydraulic system with a mechanical gear speed ratio by establishing a speed-torque-pressure three-parameter coupling model; a composite speed change module; and a control and management module. By adopting double-flow power division and convergence, power division of 70% mechanical energy direct drive and 30% hydraulic energy speed regulation is achieved, and the traditional transmission efficiency bottleneck is effectively broken through. And under the rugged terrain and the variable-load working condition, the energy utilization rate can be increased, fuel consumption is reduced, and the whole machine has higher economical efficiency and durability.

The invention discloses a grinding machine tool for machining an inner spherical surface, and relates to the technical field of spherical workpiece grinding. A grinding assembly, a driving assembly and a driving motor are mounted on the top surface of the base; the grinding assembly comprises a spindle rotationally installed on the base, the front end of the spindle is connected with a tool apron, the rear end of the spindle is connected with the driving end of the driving motor, the middle of the tool apron is hinged to the spindle, a tool bit is installed at the front end of the tool apron, and an adjusting connecting rod is hinged to the rear end of the tool apron. A sleeve capable of sliding in the axial direction of the main shaft is arranged on the main shaft, the free end of the adjusting connecting rod is hinged to the sleeve, and a driving assembly for driving the annular groove to slide in a reciprocating mode along the main shaft is arranged on the base. According to the method, shutdown calculation and calibration are not needed, and the auxiliary time is greatly shortened; meanwhile, manual operation is replaced by mechanical transmission, personal errors and multiple clamping deviations are avoided, the problem of connection dislocation of segmented grinding is solved, and the inner spherical surface contour continuity and micron-order machining precision are guaranteed.

The invention belongs to the technical field of engineering machinery, and discloses a transmission system and engineering machinery. The transmission system comprises an integrated shell, a motor assembly, a brake assembly and a speed reducer assembly, the motor assembly, the brake assembly and the speed reducer assembly are arranged in the integrated shell and distributed in the first direction, an output piece of the motor assembly is in transmission connection with an input piece of the speed reducer assembly through the brake assembly, and an output piece of the speed reducer assembly is connected with the hub. The integrated shell is provided with a cooling channel set, and the cooling channel set can conduct heat dissipation on the motor assembly, the brake assembly and the speed reducer assembly at the same time. By arranging the integrated shell, the structure of a transmission system can be simplified, the cost can be reduced, the machining consistency is good, the supporting rigidity is better, and transmission errors caused by structural deformation are reduced; the cooling channel group is arranged on the integrated shell, so that the motor assembly, the brake assembly and the speed reducer assembly can be cooled at the same time by only one cooling system, the utilization rate of the cooling system is improved, the cooling efficiency is high, and the service life of the system is prolonged.

The invention relates to the technical field of pavement material mechanical property testing, and discloses a pavement material deformation adaptability fatigue testing machine, which comprises a servo drive and control system, a mechanical transmission system and a structure support and reference system, the servo drive and control system comprises a servo motor, a PLC, a servo driver and an analog quantity output module, the PLC is electrically connected with the analog quantity output module, the analog quantity output module is electrically connected with the servo driver, and the servo driver is electrically connected with the servo motor. The load coverage range is wide, the test requirements of pavement material test pieces with different strengths are met, the requirements of various mechanical property tests on loads are met, the loading modes are flexible and diversified, single loading such as horizontal stretching, stretching containing vertical deformation and fatigue stretching circulation can be achieved, and the test efficiency is improved. The device can be combined with MMLS3 small acceleration loading equipment to realize composite loading of tire cyclic load and test piece deformation, and composite working conditions of the seamless expansion joint in actual service are accurately simulated.

The invention discloses a twistable flexible mechanical arm and a robot, and belongs to the technical field of robots. The mechanical arm comprises a single-section continuum framework composed of a supporting disc and an elastic pipe, a torsional deformation driving mechanism used for driving the far-end supporting disc to rotate, and a bending driving mechanism composed of at least three driving ropes. The supporting discs except the far-end supporting disc are provided with guide holes allowing the driving rope to slide in the circumferential direction, and therefore decoupling of twisting and bending motion is achieved. The torsional deformation driving mechanism can adopt a central elastic hose mechanical driving scheme or an external magnetic field magnetic driving scheme. According to the invention, the single-section structure can simultaneously realize two bending degrees, one stretching degree and one independent active torsion degree of freedom, so that the tail end flexibility is obviously improved, and the single-section structure is suitable for narrow and small space operations such as medical minimally invasive surgery and precise assembly.

The present application relates to the technical field of agricultural machinery. Disclosed are a hybrid combine harvester, and a control method and a controller therefor. The harvester comprises: a hybrid system comprising a power battery and a range extender composed of an engine and a generator; an operation system comprising a plurality of operation components and a plurality of operation electric motors enabling each operation component to be driven by an electric motor; a traveling system comprising traveling wheels and traveling electric motors for driving the corresponding traveling wheels; and a control system comprising a vehicle controller and a plurality of electric motor controllers respectively corresponding to the operation electric motors, the traveling electric motors and the generator. The hybrid system supplies, in response to a power control strategy of the control system, power to corresponding electric motors in the operation system and the traveling system, so as to drive the harvester to travel and operate. The present application realizes a full electric-drive hybrid solution of the harvester, and avoids the problem of efficiency caused by multi-stage mechanical transmission of a traditional harvester.

The invention relates to the field of brake-by-wire systems, and discloses a control method and system for an automobile brake-by-wire system, and the method comprises the steps: collecting motor operation parameters, environment state parameters and vehicle dynamics parameters; based on the environment state parameters and a pre-calibrated environment compensation parameter table, environment compensation is carried out on the motor current signal and the rotation angle signal; carrying out load correction on the motor current signal and the rotation angle signal which are subjected to environment compensation; identifying a current key characteristic time period and a corner key characteristic time period respectively; generating a system reliability verification coefficient based on cross validation of the current key characteristic time period and the corner key characteristic time period; calculating an actual clearance value between a friction plate and a brake disc based on a system reliability verification coefficient, the corner signal after load correction and a pre-calibrated mechanical transmission parameter; and outputting a brake system control instruction based on the calculated actual gap value.

The invention discloses an anti-clogging high-precision liquid flow sensor, and belongs to the technical field of liquid flow sensors, the anti-clogging high-precision liquid flow sensor comprises a shell, a linkage mechanism is arranged in the shell, the linkage mechanism comprises a fixing frame, a bearing, a rotating shaft, a turbine and a signal blade, one end of the rotating shaft is provided with a transmission mechanism, and the other end of the rotating shaft is provided with a transmission shaft; an electromagnet and a flushing mechanism are arranged at the bottom of the shell, the flushing mechanism comprises an electromagnetic valve and a flushing pipe, the flushing pipe is communicated with one end of the electromagnetic valve, the other end of the electromagnetic valve is communicated with a vertical pipe, and the top end of the vertical pipe is communicated with the shell. By introducing an intelligent blockage monitoring mechanism based on mechanical transmission and pressure sensing, the reliability and the pre-maintenance capability of the sensor are remarkably improved, and by integrating a set of on-line high-pressure flushing system triggered by a controller instruction, the self-cleaning function of the interior of a sensor flow channel is achieved; and the long-term cleanness and the measurement precision of the core measurement part are effectively guaranteed.

The utility model relates to the field of mechanical transmission, in particular to a linear sliding rail. The utility model provides a linear sliding rail. According to the technical scheme, the linear sliding rail comprises a sliding block assembly and a guide rail. The sliding block assembly is embedded in the guide rail and is fixedly arranged, and the guide rail can slide relative to the sliding block assembly; the guide rail is provided with a rack arranged in the track direction of the guide rail. The linear sliding rail has the advantages that the transmission precision and stability are improved, the load capacity is enhanced, and the structural design is simplified.

The application provides a coaxiality control method in a mechanical transmission system assembly process, relates to the technical field of mechanical transmission system part assembly, and solves the problem of large assembly error of coaxiality of two transmission parts with low machining precision in the assembly process of three parts. The static reference system in mechanical cooperation is converted into a dynamic reference system, the machining precision is not improved, cost is saved, the operability is high, the adjustment of the cooperation surface of the two parts with low machining precision and the intermediate part with high machining precision is realized through a thin gasket, and the purpose of improving the coaxiality installation precision of the parts is achieved.

The invention discloses a mechanical non-resonant one-bit phase electromagnetic reflection metasurface unit, and belongs to the field of artificial electromagnetic materials. The unit comprises a non-resonant electromagnetic structure and a mechanical driving device. The non-resonant electromagnetic structure comprises a dielectric layer, an air layer and an adjustable metal backboard from top to bottom; the mechanical driving device adopts a bidirectional self-holding electromagnet, a screw rod of the bidirectional self-holding electromagnet is connected with the metal back plate, the back plate is driven to be switched between two preset positions through forward / reverse pulse current, the thickness of an air layer is accurately adjusted, and therefore one-bit dynamic switching of a reflection phase between 0 degree and 180 degrees is achieved through propagation phase accumulation. In the 5G millimeter wave frequency band of 20 GHz to 29.5 GHz, the reflection coefficients of the two states are both larger than 0.99, the phase difference is stabilized within 180 degrees + / -20 degrees, and good robustness is achieved for mechanical displacement deviation. The unit has the advantages of zero static energy consumption, low insertion loss, wide bandwidth, simple structure and simple control, and is suitable for a low-power-consumption intelligent reflecting surface and a dynamic beam forming system.

The present application belongs to the clutch technical field, and particularly relates to a clutch assembly with two-way power output and a working method thereof. The driven disc assembly of the device is located between the pressure disc assembly and the engine flywheel, the pressure disc assembly is fixedly connected with the engine flywheel, and the pressure disc assembly and the driven disc assembly each output one way of power to the outside. The pressure disc assembly is fixedly sleeved on the hydraulic transmission input shaft sleeve, and is used for transmitting power to the hydraulic element. The driven disc assembly is fixedly sleeved on the mechanical transmission input shaft, and is used for outputting power through the mechanical transmission input shaft. The mechanical transmission input shaft is arranged in the hydraulic transmission input shaft sleeve, and there is a gap between the mechanical transmission input shaft and the hydraulic transmission input shaft sleeve, so that the two-way power output is isolated. The hydraulic transmission input shaft sleeve is connected with the input end of the hydraulic element, and is used for realizing the cutting and connecting of the hydraulic transmission. The device has a simple structure, can realize two-way power output, and has smooth and stable gear shifting.

This invention belongs to the field of mechanical transmission design, specifically relating to an easily detachable spline connection kit and its usage method. The invention proposes an easily detachable spline connection kit, including a spline connection structure and a disassembly fixture. The spline connection structure includes an inner spline shaft, a retaining ring, and an outer spline shaft. The inner spline shaft has an outer retaining ring groove in its shaft hole and an inner retaining ring groove in its shaft portion. Axial positioning is achieved by embedding a retaining ring in the outer and inner retaining ring grooves. The inner spline shaft has several axial retaining ring disassembly grooves spaced apart at the shaft hole opening, extending inward beyond the outer retaining ring groove. The disassembly fixture includes a sleeve and a screw. The sleeve has a clearance fit with the inner spline shaft and a threaded hole aligned with the retaining ring disassembly groove for screwing in the screw. Compared to existing structures, this significantly improves connection strength and reliability while also making disassembly easier.

1. The name of the design product: speed reducer. 2. The use of the design product: the design product is used for mechanical transmission device to reduce speed. 3. The design points of the design product: in shape. 4. The picture or photo that can best show the design points: perspective view.