488results about How to "Small structure" patented technology

The invention provides a spliced frame structure for a flat plate type satellite, and belongs to the technical field of satellite structures. The problems that an existing satellite frame is high in production cost and difficult to produce in batches are solved. The beam unit comprises an X-axis beam unit, a Y-axis beam unit and an inclined beam unit, the X-axis beam unit and the Y-axis beam unit are arranged in an orthogonal mode, an included angle is formed between the inclined beam unit and the X-axis beam unit, the X-axis beam unit comprises a first X-axis beam, a second X-axis beam, a third X-axis beam and a fourth X-axis beam, and the X-axis beam unit comprises a first X-axis beam, a second X-axis beam, a third X-axis beam and a fourth X-axis beam. The Y-axis beam unit comprises a first Y-axis beam, a second Y-axis beam and a third Y-axis beam, the oblique beam unit comprises a first oblique beam and a second oblique beam, and the splicing unit comprises a Y-axis separation mechanism connector and an X-axis separation mechanism connector. The frame structure is mainly used for a flat plate type satellite.

The utility model discloses a tension test tool for a micro motor, which comprises a tension meter, and further comprises a first mounting plate, a first connecting plate, a second mounting plate and a second connecting plate which are sequentially arranged along the vertical direction, wherein the tension meter is arranged on the second mounting plate, and one end of the tension meter is connected with the second connecting plate through a spring; a connecting rod is arranged between the first connecting plate and the second connecting plate, a guide rod is arranged between the first mounting plate and the second mounting plate, and the first connecting plate is arranged on the guide rod in a sleeving mode so as to slide in the extending direction of the guide rod. The tension test tool designed by the utility model can be effectively applied to the tension test of the micro motor on the premise of reducing the size of the self structure by optimizing the self structure, is convenient to use, and has good popularization prospect and application value.

The invention relates to the technical field of artificial electromagnetic metasurfaces, in particular to a full-space multifunctional terahertz metasurface. The metasurface is composed of a plurality of metasurface units arranged periodically, and each metasurface unit sequentially comprises a first metal structure layer, a first middle dielectric layer, a grating layer, a second middle dielectric layer and a second metal structure layer from top to bottom. The first metal structure layer and the second metal structure layer are the same in structure and each comprise two C-shaped metal rings, and the two C-shaped metal rings are connected in a staggered mode to form a disconnected and staggered S shape. The first intermediate dielectric layer and the second intermediate dielectric layer are consistent in thickness; the grating layer comprises vanadium dioxide and copper which are alternately arranged, and multifunctional dynamic regulation and control of transmission, reflection and the whole space are achieved by controlling phase change of the vanadium dioxide. The metasurface provided by the invention can respectively realize the functions of polarization conversion, linear-circular polarization wave conversion, circular dichroism, asymmetric transmission and the like in different states.

The invention relates to a vehicle power supply system, a control method of the vehicle power supply system and a vehicle. In the vehicle power supply system, a first DCDC conversion module is electrically connected with a power battery system through a first switch unit; the second DCDC conversion module is electrically connected with the power battery system; the first switch unit is a normally closed switch; the first DCDC conversion module is also electrically connected with the second switch unit; the rated power of the first DCDC conversion module is smaller than that of the second DCDC conversion module; the first DCDC conversion module and the second DCDC conversion module are both used for converting high voltage provided by the power battery system into low voltage. The first DCDC conversion module provided by the embodiment of the invention is relatively small in structure and relatively low in cost, and the first DCDC conversion module is arranged in the whole vehicle, so that the weight and the cost of the vehicle can be reduced, and miniaturization of the vehicle is facilitated.

The invention relates to the technical field of electric vehicle heat management, in particular to an indirect heat pump type heat management system. Comprising an electric drive cooling liquid loop, a battery cooling liquid loop, a heating cooling liquid loop and a refrigerant loop. The heating cooling liquid loop comprises a first heating loop and a second heating loop; the first heating loop is connected in series with a warm air core body; the second heating loop exchanges heat with the battery cooling liquid loop through the battery heating heat exchanger; the refrigerant loop comprises a first refrigerating loop, a second refrigerating loop and a third refrigerating loop; the first refrigerating loop exchanges heat with the heating coolant loop through the water-cooled condenser; the second refrigerating loop exchanges heat with the battery cooling liquid loop through the battery cooling heat exchanger; an evaporator used for cooling the passenger compartment is connected to the third refrigeration loop in series. And the battery cooling liquid loop and the electric drive cooling liquid loop are mutually coupled and communicated. The indirect heat pump type heat management system can well meet the heating requirements of a battery pack and a passenger compartment.

The invention provides a portable medium-long wave active receiving antenna structure comprising a tripod used for supporting an antenna; the flange seat is mounted on the tripod; an antenna body is mounted on the flange seat, an antenna outer cover and an antenna upper cover are arranged outside the antenna body, and the antenna body comprises an antenna signal synthesis structure and a magnetic bar antenna assembly mounted at the top of the antenna signal synthesis structure. The magnetic bar antenna structure is adopted, so that the structure is greatly reduced, and the magnetic bar antenna is of a straight-tube-shaped structure on the whole, is extremely convenient to carry in the using process, can be carried by one hand, and is simple to erect, convenient to disassemble and assemble and high in maintainability.

The invention relates to the technical field of metal surface treatment, in particular to a method for achieving titanium metal surface rapid boronizing through electric field induction nanometer assembly in molten salt, titanium dioxide powder, boron powder, inorganic salt and a nanometer particle wrapping agent are evenly mixed, and the molten salt containing nanometer TiB2 is obtained after heating reaction. Graphite and a titanium metal part are put into molten salt containing nano TiB2, the graphite serves as a positive electrode, the titanium metal part serves as a negative electrode, the surface area ratio of the positive electrode to the negative electrode is (3-10): 1, the nano TiB2 in the molten salt is assembled on the surface of the titanium metal part under the action of an electric field to form a boronizing layer, and the boronizing speed is 60-500 microns / h. Compared with an existing high-temperature boronizing technology with active boron atoms as a constituent unit, the high-temperature boronizing technology has the advantages that the boronizing speed can be remarkably increased, the high-temperature boronizing treatment time of titanium metal is shortened, energy is saved, cost is reduced, and meanwhile the negative influence of the high-temperature environment on the organization structure and the mechanical property of a titanium metal part is eliminated.

The utility model discloses a crane for self-lifting wind power operation and maintenance, which comprises a plurality of self-lifting devices, a mast crane and a plurality of pulley blocks, a base is arranged on the mast crane, and the mast crane is sleeved on a fan tower drum through the base; the pulley block comprises a fixed pulley block and a movable pulley block, the fixed pulley block is mounted at the bottom of the fan cabin, and the movable pulley block is mounted on the base; the self-lifting device comprises a steel wire rope used for lifting an object, and one end of the steel wire rope is fixed to the bottom of the fan cabin and extends from the bottom of the fan cabin to be wound on the fixed pulley block and the movable pulley block. The mast crane ascends or descends along the fan tower along with winding and unwinding of the steel wire rope. According to the utility model, the tower barrel structure does not need to be changed, the hoisting capacity is stronger, each structure is simple to disassemble and assemble, each part is convenient to enter and transport after being disassembled and assembled, the cost is effectively reduced, and the adaptability of the crane to various working conditions is improved.

The invention provides an integrated light quantum mixed-phase flow meter and a mixed-phase fluid measurement method, relates to the technical field of industrial mixed-phase fluid measurement, and aims to solve the problem that an existing underwater flow meter is poor in measurement accuracy of a mixed-phase fluid medium in a deep-sea oil and gas well. The integrated light quantum mixed-phase flow meter comprises a flow meter body, a fluid metering channel penetrates through the center of the flow meter body, and the integrated light quantum mixed-phase flow meter is applied to a deep-sea oil-gas well. The flowmeter main body is a sealed cylinder, and two groups of electric connectors are arranged at the top of the flowmeter main body; the fluid metering channel comprises an inlet pipe section and a middle measuring pipe section, and the middle measuring pipe section is provided with an inner throttling body of a spindle structure; a plurality of sets of measuring systems are integrated on the flowmeter main body, and each set of measuring system is arranged between the fluid metering channel and a shell of the flowmeter main body and is used for measuring the flow of each phase medium in the mixed-phase fluid flowing through the inner-section fluid; a sealing partition plate is arranged on the side, away from the fluid metering channel, of each measuring system and used for isolating seawater.

The invention discloses an integrated optical fiber ultrasonic endoscope and a preparation method, and belongs to the field of ultrasonic sensors. Comprising a multi-core optical fiber, a dielectric film, a strip-shaped sensing layer, a mixed excitation inclined wedge, a sensibilization column and an endoscopic sheath. Double sensibilization is achieved through the sensibilization columns and the strip-shaped sensing layer, the sensitivity of lateral sensing is greatly improved, and good directivity is achieved on a film layer plane through the strip-shaped structure of the sensing layer. And the mixed excitation inclined wedges respectively realize side sound field excitation which is double and quadruple of that of the traditional single-mode optical fiber in two intensity directions. The problems that an existing optical fiber ultrasonic sensor is large in size, low in excitation power, low in integration level and low in sensitivity are solved.

The invention provides a pressure-controllable chip mounting head. The pressure-controllable chip mounting head comprises a vertical driving assembly, a first-stage sliding assembly and a second-stage sliding assembly, the first-stage sliding assembly comprises a first-stage sliding table; the second-stage sliding assembly comprises a second-stage sliding table; a hollow rotating shaft is rotatably mounted in the secondary sliding table, and a suction head is fixed at the bottom of the hollow rotating shaft; a spring assembly is mounted between the first-stage sliding table and the second-stage sliding table; a grating ruler is fixed on the first-stage sliding table, and a reading head is fixed on the second-stage sliding table at a position corresponding to the grating ruler; the spring assembly comprises an extension spring and an adjusting spring assembly, and the extension spring is connected with the first-stage sliding table and the second-stage sliding table so that the second-stage sliding table can be hung below the first-stage sliding table. The adjusting spring assembly comprises a spring guide column, the top of the spring guide column is fixed to the first-stage sliding table, and the bottom of the spring guide column is inserted into the second-stage sliding table in a sliding mode. And a large spring and a small spring are sleeved on the spring guide post. The pressure control difficulty is low, the technical threshold is low, and the chip mounting head is small in overall structure and low in cost.

The utility model discloses an actuator assembly of a door lock and an outer handle and a vehicle, and the actuator assembly of the door lock and the outer handle comprises an outer handle component, an inner handle component and an outer handle component, the door lock assembly is attracted; the actuator assembly comprises a driving structure, a first pull wire and a second pull wire, the first pull wire and the second pull wire are both connected with the driving structure, and the driving structure is connected with the outer handle assembly through one of the first pull wire and the second pull wire and is suitable for pulling the outer handle assembly to be opened; the driving structure is connected with the pull-in door lock assembly through the other one of the first pull wire and the second pull wire and is suitable for pulling the pull-in door lock assembly for locking. According to the actuator assembly of the door lock and the outer handle, the overall transmission form in the side door is simplified, and the arrangement cost of a driving structure is reduced.

According to the efficient multi-wire gas shielded welding gun, three auxiliary gun bodies are integrated in a main gun body shell through a welding gun base, included angles are designed between the axes of the three auxiliary gun bodies and the axis of a main gun body, three electric arcs generated by the three auxiliary gun bodies during welding can be gathered, and welding bead separation generated under small welding parameters is effectively prevented; when the three sublance bodies ignite arcs at the same time, mutual interference among three arcs under large welding parameters is effectively reduced, and stability of the welding process is facilitated; the upper end structure of the welding gun base is designed to be of a hollow structure, circulating cooling of the three sub-gun bodies can be enhanced through external cooling water during welding, meanwhile, the three sub-gun bodies are internally provided with respective water cooling systems, and the water cooling effect of the whole gun body is remarkably improved through the cooling mode, so that large-current and large-voltage welding is achieved.

The invention discloses a distributed K-H-V type involute joint module with a small tooth difference. The distributed K-H-V type involute joint module is applied to a joint on a snakelike mechanical arm. The joint module is composed of three sets of rotary driving units, a rack, an inner gear and an outer gear, in the transmission process, the eccentric shaft rotates to drive the inner gear to output at the rotating speed, and then the outer gear translates. The three groups of rotary driving units are respectively mounted in through holes formed in the inner gear and the outer gear at equal intervals; the rotary driving unit is matched with a bearing, an outer gear and an inner gear through a small motor, so that the space utilization rate of the joint module is increased; and in addition, by reducing transmission links, the power loss of the joint module is reduced, so that the joint module has the characteristics of small size and high output efficiency on the basis of having the characteristics of high rigidity and large transmission ratio of involute small tooth difference planetary gear transmission.

The utility model discloses an underground hydraulic auxiliary drive bridge plug seat sealing device which comprises a booster cavity located in a device body, and the booster cavity is connected with an underground hydraulic environment through a liquid inlet. A piston structure is arranged in the pressurizing cavity in an axial sliding mode and used for opening and closing the liquid inlet. One end of the piston structure is connected with a driving device for driving the piston structure to linearly move, and the other end of the piston structure is connected with a setting pull rod for pulling a setting execution mechanism in the bridge plug structure. High setting force is provided by replacing gunpowder combustion with underground hydraulic boosting, so that the size of the device is reduced.

The invention relates to the technical field of unmanned aerial vehicle laser point cloud, and discloses a digital elevation model construction method based on an unmanned aerial vehicle laser radar, and the method comprises the steps: carrying out the field flight of a target region based on an unmanned aerial vehicle carrying a laser radar load, and obtaining the point cloud data of the laser radar; and based on the laser radar point cloud data, carrying out point cloud data calculation to generate a digital elevation model. The technical means that the unmanned aerial vehicle carries a laser radar load is adopted, field flight is carried out on an east area salt pan sedimentation basin area to obtain laser radar point cloud data, the instrument integrates a high-precision laser scanner and an inertial navigation system, the overall structure is small, the weight is light, and the instrument is suitable for data collection on an unmanned aerial vehicle platform; high-precision three-dimensional data of the earth surface can be rapidly collected in real time, and point cloud data calculation is carried out through digital green soil LiDAR360 software to generate a digital elevation model.

The invention provides a switching power supply, a control circuit and a fault detection circuit and method.The fault detection circuit detects a control module, performs time-sharing detection on at least two of open circuit detection, short circuit detection and overvoltage detection of the output end of the switching power supply, and generates a corresponding second control signal under each detection; the voltage detection module generates a corresponding threshold voltage according to the second control signal under each item of detection and generates a corresponding detection signal according to the voltage of the output end of the switching power supply and the corresponding threshold voltage, and the detection control module generates a corresponding detection result signal according to the corresponding detection signal; the fault detection circuit obtains detection signals corresponding to at least two of open circuit detection, short circuit detection and overvoltage detection through the multiplexing voltage detection module. According to the invention, the same circuit is multiplexed in a time division manner to carry out open-circuit detection, short-circuit detection, overvoltage detection and undervoltage detection on the output end of the switching power supply, so that the safety and reliability of the switching power supply are improved, and the circuit structure is simplified.

The invention discloses a forestry engineering sapling storage device capable of improving the survival rate, and relates to the technical field of sapling transplanting. Comprising a transplanting storage part, a sand culture maintenance part is installed on the transplanting storage part, and the sand culture maintenance part is used for throwing sandy soil to maintain saplings; a row of root protection pieces are mounted on the transplanting storage piece; the row of root protection pieces are used for preventing the roots of the saplings from being wound; soil loosening pieces are respectively mounted on the row of root protection pieces; the soil loosening part is used for loosening sandy soil through air pressure; soil loosening indication pieces are fixedly mounted on the row of root protection pieces respectively; sandy soil hardening can be prevented, soil air permeability can be guaranteed, the water permeability rate is also guaranteed, and the seedling survival rate is increased. A soil loosening indicator is matched, so that saplings cannot be damaged; the problems that according to an existing sapling storage device for forestry engineering, sandy soil on saplings is prone to hardening, air permeability is affected, and the seedling death rate is increased are solved.

The utility model provides an automobile electronic water valve actuator which comprises a lower shell and an upper shell, a gear set, a motor and a PCB are arranged in an installation cavity of the lower shell, the upper shell is connected to the opening end of the lower shell, an upper positioning portion is arranged on the lower end face of the upper shell, a lower positioning portion is arranged on the lower shell, the upper positioning portion is matched with the lower positioning portion, and the upper positioning portion is matched with the lower positioning portion. The PCB is pressed and limited between the upper positioning part and the lower positioning part; the free end of an output shaft of the motor is sleeved with a magnetic ring, the PCB is connected with a Hall sensor used for sensing signals of the magnetic ring, and the Hall sensor is electrically connected with the PCB. According to the automobile electronic water valve actuator disclosed by the utility model, the accurate control of the output angle of the actuator is ensured by improving the assembly accuracy of parts and improving the control of the output angle of the motor.

The invention discloses an inner hole coating bonding strength detection device, and belongs to the field of inner hole coating detection. Comprising a test assembly, a control assembly for controlling the test assembly, and a signal transmission assembly for transmitting a test result, the product to be tested is fixed on the test board through the positioning clamp; the test assembly extends into the inner hole of the product to be tested through the control assembly so as to control the scribing track, the scribing position and the scribing pressure of the test assembly; the test signal of the test assembly in the test process is obtained through the signal transmission assembly, and the test signal is transmitted to the control assembly to be displayed so as to assist man-machine interaction in the test process. According to the method, the problems of low detection precision of the inner hole pattern layer and bonding strength difference caused by incapability of quantitatively analyzing different process parameters in the prior art are solved.

The invention discloses a steel pipe gap detection device, and relates to the technical field of detection equipment. Comprising a detection part, the detection part comprises a rotating ring, a scraper block and a detection module, the scraper block and the detection module are arranged in an inner cavity of the rotating ring, the scraper block can clean the outer surface of a steel pipe welding seam, and the detection module can conduct ultrasonic detection on the steel pipe welding seam. The device is small in structural size, light in weight and capable of being conveniently transported to a welding site and detecting a welded pipeline without tools, the link of transporting the welded pipeline is omitted, welding seam detection of the welded pipeline is greatly facilitated, a scraper block can clean a welding seam of the welded pipeline, welding slag on the surface of the welding seam is removed, and the welding efficiency is improved. The welding slag is prevented from affecting the detection effect, the conduction assembly of the detection module can effectively conduct ultrasonic signals, the coupling water in the sealing cylinder further strengthens the conduction effect of the conduction assembly, and therefore the detection effect of the ultrasonic probe is improved.

The invention belongs to the technical field of on-line monitoring of power equipment, and discloses a high-frequency ultrasonic optical fiber sensing probe for partial discharge detection, which comprises a sensing optical fiber, and the end face of one end of the sensing optical fiber is provided with a plano-concave optical resonant cavity structure of the end face of one end of the sensing optical fiber. According to the principle that detection is carried out through deformation of a vibrating diaphragm and a sound-sensitive material under the action of sound waves, the refractive index of the polymer material is changed through the elasto-optical effect of sound pressure on the polymer material of the polymer curved surface layer, and external ultrasonic sensing is achieved. The antenna is not limited by the inherent mechanical resonant frequency of materials, and has the technical characteristic of wide frequency band; the diameter of the ultrasonic sensor is only the diameter of an optical fiber, and the ultrasonic sensor has the structural characteristics of tiny structure and flexible detection, is of a fully fixed structure, has no additional vibrating diaphragm, no space light path alignment part and the like, and is higher in system structural stability.

The utility model discloses a multi-functional mobile tool magazine for spring piece, including engine base, drive device and tool apron, engine base is provided on the spring equipment, drive device is provided in the middle position of engine base, drive device both sides stretch out of engine base's two side wall, there are provided two sets of tool apron respectively sliding installation on engine base both sides, and the tool apron is provided with the tool apron. The driving device can drive the two tool aprons to move relatively; the bottom wall of the tool apron and the side wall, away from the machine base, of the tool apron are provided with a plurality of first tool positions and a plurality of second tool positions respectively, the first tool positions and the second tool positions are arranged at intervals, and the first tool positions and the second tool positions are used for installing tools. The same driving device is adopted for switching of the two tool aprons, so that the overall structure of the tool magazine is smaller, the occupied size of the tool magazine is reduced, therefore, the tool magazine can be used for machining parts with smaller sizes, the machining precision is higher, and when the driving device works, the two tool aprons move towards opposite positions, and then tool switching is achieved.

The utility model relates to a recoverable excitation integrated contactor with active and passive integrated protection, which comprises a driving system, a contact system, an excitation ignition assembly, a magnetic tripping device, a microswitch, a first piston, a second piston, a melt cutting push rod, an auxiliary contact system and an arc extinguishing melt, the drive coil loop is connected with a trigger loop of the excitation ignition assembly in parallel and connected with a normally-closed contact and a normally-open contact of the microswitch in series, the state change of the drive coil loop and the trigger loop is controlled through a magnetic tripping device linked with the microswitch, and a trigger signal is provided for the excitation ignition assembly. The first piston is driven to enable the auxiliary contact system to be conducted so that the arc extinguishing melt can be connected to the main loop in parallel, the second piston is driven to drive the elastic piece to move so that the contact system can be forcibly opened, and then the first piston drives the melt cutting-off push rod to disconnect the arc extinguishing melt. Through excitation integration, the breaking capacity of the contactor is improved, and the current matching difficulty with the fuse is reduced; and after the protection action, the normal switching-on and switching-off functions of the contactor are maintained.

The utility model discloses a pair of electric scissors capable of adjusting the cutting angle of the scissors, which comprises a main body, and the main body is provided with a fixed blade, a movable blade and a sensor for controlling the rotating angle of the movable blade, the movable blade has a closed end position relative to the fixed blade; the sensor comprises an end position sensor for detecting that the movable blade reaches the end position; the tail position sensor is movably installed on the main body and can adjust the position relative to the main body so as to change the tail position where the movable blade can move to and adjust the closing degree of the movable blade and the fixed blade. The utility model has the advantage of solving the problem that the closing degree is reduced after the blade is abraded at present. The shearing compensation of the abraded movable blade is realized with lower cost and fewer structures without modifying an electric control program or modifying the existing movable blade and fixed blade, the operation difficulty is greatly reduced, the tail position of the movable blade can be changed only by adjusting the relative position of the tail position sensor on the main body, and the shearing compensation of the abraded movable blade is realized. The adjustment is simpler and quicker.

The invention discloses temperature-sensitive antibacterial hydrogel based on ultra-small-particle-size copper nanoparticles and a preparation method of the temperature-sensitive antibacterial hydrogel, and relates to the technical field of biomedical materials. The preparation method of the temperature-sensitive antibacterial hydrogel comprises the step of uniformly mixing the gel matrix, the stabilizer, the pH buffer solution and the ultra-small-particle-size copper nanoparticles to prepare the temperature-sensitive antibacterial hydrogel. The preparation method of the copper nanoparticles with the ultra-small particle size comprises the following steps that lactoferrin is dissolved in water, copper sulfate pentahydrate is added, an alkali solution is added to adjust the pH of the solution to be 8-14, then a reducing agent is added for a reaction, dialysis and drying treatment are conducted, and the copper nanoparticles with the ultra-small particle size are obtained. The hydrogel has good injectability, can release the copper nanoparticles under specific conditions and rapidly sterilize, in addition, the hydrogel is convenient to synthesize and simple to operate, has good biocompatibility, shows relatively low cytotoxicity to cells, and has relatively great application potential in the process of treating skin wound infection.

The utility model discloses a centrifugal pipe fitting cutting tool bit structure which comprises a driving system, a tool bit driven by the driving system to rotate and a blade assembly arranged on the tool bit, and is characterized in that a sliding groove is formed in the tool bit, a sliding block matched with the sliding groove in a sliding mode is arranged in the sliding groove, the blade assembly is fixed with one end of the sliding block, and the other end of the sliding block is fixed with the blade assembly. A balancing weight is arranged at the other end of the sliding block, an elastic piece enabling the sliding block to reset is arranged between the sliding block and the groove end wall of the sliding groove, and the sliding block can abut against the two groove end walls of the sliding groove to prevent the sliding block from disengaging and sliding out. The sliding blocks slide in the sliding grooves and rotate together with the sliding grooves through centrifugal force generated by high-speed rotation of the tool bits, the structure is simple, the overall structural size is small, therefore, more tool bits can be installed in the same space, abrasion is small, and cost is low.

The utility model discloses a broadband distributed bearing direct drive vibration reduction actuator, which belongs to the technical field of vibration reduction actuators and comprises a shell, and a first vibration reduction component and a second vibration reduction component which are identical in structure are symmetrically arranged in the shell. The vibration reduction assembly comprises two frameless motors located on the same plane and two eccentric mass blocks located on the same plane, rotating shafts are arranged on the two sides of each eccentric mass block, the rotating shaft on one side is connected with a rotor of the corresponding frameless motor, the rotating shafts on the two sides of each eccentric mass block are connected with bearings respectively, and the bearings are connected with the motors. The shell is provided with a front end cover and a rear end cover. According to the broadband distributed bearing direct-driven vibration reduction actuator provided by the utility model, the rotor of the frameless motor drives the eccentric mass blocks to rotate, the rotor of the frameless motor and the eccentric mass blocks are supported by the distributed bearings, and the two groups of same eccentric mass blocks output broadband output force with an adjustable centrifugal force included angle. And the vibration force is counteracted with the vibration force in a use environment to realize active vibration reduction.

The utility model discloses a portable charging box, which belongs to the technical field of electric power equipment and comprises a first box body and a second box body which are rotatably connected, a panel is arranged in the first box body, a plurality of different types of battery holders are arranged on the top surface of the panel and used for mounting batteries so as to adapt to the batteries of different types, and the first box body and the second box body are connected through a wire. An output interface is further arranged on the side wall face of the first box body and used for supplying power to external equipment by being externally connected with different types of adapter cables or charging bases, good universality and compatibility are achieved, meanwhile, the second box body is made of carbon fibers, the first box body and the panel are made of aluminum alloy materials, heat dissipation holes are further formed in the panel, and therefore the heat dissipation performance is improved. The overall structure is light while the structural strength and the heat dissipation function are guaranteed. Furthermore, the position structures of the panel and all parts in the first box body are adjusted, so that the charging box is compact in overall structure, a handle is arranged on the first box body, the charging box can be carried by a single person, and the charging box has a good application prospect.

The utility model discloses a remote control self-propelled small-sized sugarcane threshing machine, which relates to the technical field of agricultural machinery and comprises a machine body side cross rod, a gasoline engine is fixed at the upper end of the machine body side cross rod, a power input shaft is arranged on the surface of the gasoline engine, and a transfer case is in transmission connection with the surface of the power input shaft. The two sides of the transfer case are in transmission connection with a first power shaft and a second power shaft respectively, the other end, opposite to the transfer case, of the first power shaft is in transmission connection with a speed changer, the gasoline engine is used for outputting power, and the threshing function and the self-walking function of the threshing machine can be achieved at the same time; the steering of the threshing machine and the rotation stop of the threshing roller can be remotely controlled through the control cabinet; in addition, the wheel distance between the front axle and the rear axle in the walking device is the same as the width of a sugarcane ridge for planting sugarcanes in hilly and mountainous regions at present, so that the walking device is convenient to move in sugarcane fields.