35results about How to "Realize continuous adjustment" patented technology

The utility model discloses a kind of turning conveying devices with adjustable pushing mechanism, belong to material conveying equipment technical field, including support, conveying belt and baffle;Baffle inside is provided with through slot, and pushing plate with buffer pad is hinged in through slot;Baffle outside is provided with drive box, and its inside is driven carousel by reduction motor, and the stroke adjusting mechanism of the edge of carousel drives push rod reciprocating motion by connecting rod, and pushing plate is periodically opened and closed by pushing.By adjusting screw changes the radial position of convex slider on carousel, realizes that pushing plate rotation angle 10°-45° continuously adjustable.This device solves the problem of self-adapting dredging in curved channel, and is suitable for logistics sorting system.

This utility model discloses a biomass fuel extrusion molding device, belonging to the technical field of biomass fuel production equipment. It includes a collection shell, with an adjustment component fixedly installed in the middle of the lower surface of the collection shell, and a material storage component fixedly connected to the inner bottom wall of the collection shell. The adjustment component controls the rotation amplitude of the inner box to adjust the overlap range between the first and second discharge troughs, thereby achieving continuous adjustment of the size of the extruded biomass fuel. This meets the diverse fuel specifications required by different combustion equipment, and eliminates the need to replace molds or the entire equipment, effectively reducing equipment replacement and maintenance costs. It also improves production flexibility and efficiency, enhances equipment adaptability and ease of operation. The material storage component allows for thorough cleaning and maintenance of the outer box interior by removing the lid, effectively preventing blockages or contamination caused by material residue and ensuring the stability of equipment operation and molding quality.

The utility model discloses a spring wire clamping assembly which comprises a wire cylinder and a wire clamping piece, the wire clamping piece is arranged outside the wire cylinder, the wire clamping piece comprises an installation assembly, clamping assemblies are arranged on the outer wall of one side of the installation assembly, the clamping assemblies are divided into the first clamping assembly and the second clamping assembly, the first clamping assembly comprises a first installation base, and the second clamping assembly comprises a second installation base. The outer wall of one side of the first mounting base is in threaded connection with a first mounting pin rod, one end of the first mounting pin rod is sleeved with a first pressing plate, the outer wall of one side of the top of the first mounting base is in threaded connection with a limiting bolt, a pressure spring is mounted at the bottom end of the limiting bolt through a bolt, and the bottom end of the pressure spring makes contact with the first pressing plate. The clamping assembly is divided into the first clamping assembly and the second clamping assembly, the first clamping assembly and the second clamping assembly are both matched with bolts through springs, continuous adjustment of linear clamping force is achieved, the clamping assembly can be matched with molybdenum wires or copper wires of different diameters, compared with a traditional structure, the vibration resistance is high, the pre-tightening force is dynamically adjusted according to the diameter of an electrode wire, and the clamping assembly is convenient to use. And wire breakage or slipping is not easily caused.

The utility model discloses an angle-adjustable fructus amomi baking tray structure, which relates to the technical field of medicinal material processing equipment, and comprises a rectangular tray of which the side end is provided with a handle, the middle part of the rectangular tray is provided with a circular through hole, the circular through hole is rotatably provided with a rotating ring, and the inner side of the rotating ring is provided with a bearing net disc and a flow guide net disc; the flow guide net disc is located on the lower side of the bearing net disc and fixed to the inner wall of the rotating ring, and a plurality of flow guide blades are fixed to the lower end of the flow guide net disc in an annular array mode. The rotating ring, the bearing net disc, the flow guide net disc and the flow guide blades are arranged in a matched mode, when hot air flow in the baking oven flows from bottom to top, the flow guide blades are pushed to drive the rotating ring to rotate integrally, fructus amomi located at the upper end of the bearing net disc rotates along with the bearing net disc, continuous adjustment of the baking angle is achieved, and local overheating of the fructus amomi is avoided.

This application discloses a concrete leveling machine, comprising: a driving and moving mechanism for driving movement; an electric telescopic rod mounted on the upper side of the driving and moving mechanism, and an adjustable flat frame mounted on the inner side of the moving end of the electric telescopic rod; an adjusting rod threadedly connected to the inner side of a first mounting frame, and a positioning block rotatably mounted on the outer side of the adjusting rod; the first mounting frame and a second mounting frame forming a sliding connection; and a scraping mechanism mounted on the lower end of the adjustable flat frame to scrape away excess concrete first. This application has at least the following advantages: by rotating the adjusting rod to drive the positioning block, the second mounting frame slides along the first mounting frame, achieving continuous adjustment of the leveling roller spacing to adapt to concrete construction surfaces of different widths; the electric telescopic rod drives the adjustable flat frame to rise and fall vertically, allowing the leveling rollers to conform to concrete layers of different thicknesses, ensuring consistent leveling results.

This invention discloses a method for printing two-dimensional structures of thermosetting materials with controllable surface roughness, comprising: controlling the rheological properties of the extrusion behavior of a selected thermosetting material; calculating and determining the relationship between the deposition morphology of the thermosetting material and printing parameters, and plotting an H-V phase diagram to determine the critical printing range for achieving uniform deposition; establishing a single-fiber deposition morphology evolution model and a multi-fiber fusion geometric evolution model to provide a correlation between the degree of fusion of adjacent deposited fibers and the surface micro-roughness, thereby obtaining a preset surface microstructure morphology; and, according to the required surface roughness, solidifying and locking the interface through thermal curing at different fusion stages to obtain a continuously adjustable and structurally stable two-dimensional film of thermosetting material. This invention can realize the printing of two-dimensional structures of any thermosetting material system on any spread substrate, and can continuously and programmably adjust the surface roughness.

The utility model belongs to the technical field of straightening granulators, and particularly relates to a straightening granulator screen adjusting frame which comprises a base, a supporting frame arranged at the top of the base, a motor arranged on one side of the top end in the supporting frame, a driving gear arranged on an output shaft of the motor, a driven gear meshed with the outer edge of the driving gear, a connecting shaft arranged at the bottom of the driven gear, and a rotating disc arranged at the bottom end of the connecting shaft. The top of the turntable is provided with an adjusting hole, and the turntable is provided with a charging barrel at the top of the adjusting hole. Through the mutual cooperation of the inner screen, the sliding groove, the outer screen, the screw rod and the adjusting knob, an operator can accurately control the aperture size under the condition that the screens are not replaced, the screening requirements of materials with different particle sizes are met, and through the mutual cooperation of the motor, the driving gear, the driven gear, the rotating disc, the adjusting hole and the discharging opening, when the granulator is used for feeding materials, the screening efficiency is improved. The feeding amount can be timely and conveniently adjusted, and the problem of material accumulation or insufficient feeding in the production process of the device is avoided.

The utility model discloses a PHA material straw which comprises an outer straw body, an inner straw body is in threaded connection with the interior of the upper end of the outer straw body, an upper connecting ring is arranged at the lower end of the outer straw body, a plurality of elastic petal pipes are connected to the lower end of the upper connecting ring, and a lower connecting ring is connected to the lower ends of the elastic petal pipes. The lower end of the lower connecting ring is provided with an inverted-cone-shaped puncture suction head, the upper side of the outer portion of the inner suction pipe is connected with a limiting ring, the upper end of the upper connecting ring is connected with a connecting sealing pipe, the connecting sealing pipe is inserted into the lower end of the outer suction pipe and tightly attached to the outer wall of the inner suction pipe, and the lower end of the inner suction pipe is internally connected with an upper connecting frame. Through threaded connection of the outer suction tube and the inner suction tube and deformation control of the elastic petal tubes, switching between the straight suction function and the filtering suction function is achieved, the elastic petal tubes are tightly attached to form a sealed connection straight tube during straight suction, the elastic petal tubes are bent to form filtering gaps during filtering suction, the structure is simple, and the functions are diversified.

The utility model belongs to pipeline support technical field discloses a kind of splicing exhaust pipe support frame, including two connecting frames, the end of two connecting frames mutually close is fixedly connected with connecting plate one, connecting plate lower end is fixedly connected with support seat, and the upper end of two connecting frames is fixedly connected with support mechanism by bolt, and the upper end of support mechanism is movably connected with buckling mechanism, and the inside of support mechanism and the inside of buckling mechanism are fixedly connected with exhaust pipe body. Through the quick splicing between buckling mechanism and support mechanism, without complex equipment and professional technology in installation and dismounting process, through bolt connection, lock tongue engagement and other structures realize quick assembly, greatly reduce the dependence on manpower and equipment when support frame is installed and used, greatly improve construction efficiency, also convenient for later maintenance of pipeline;Through support seat, the continuous adjustment of support height can be realized, and the installation position of support frame can be changed simultaneously.

The utility model relates to steel structure construction technical field, concretely is a kind of multi-angle small specification steel member fixing device, including first steel tank and second steel tank, first steel tank and second steel tank between being provided with movable steel sheet and connecting steel sheet, two ends of movable steel sheet are respectively rotatably connected with first steel tank and second steel tank, movable steel sheet is set in sectional type, and rotatably connected between two adjacent sections;Connecting steel sheet one end is rotatably connected with first steel tank, and other end is detachably connected with second steel tank;When using, steel member is placed in the clamping groove of first steel tank and second steel tank.The utility model is connected by sectional movable steel sheet through the rotatable connection between adjacent sections, adapts to the steel member fixing demand of different inclination angles, ensures the accurate positioning and fixation of small specification steel member, and the combination of adjusting structure and elastic pressing plate makes the device can adapt to the steel member of different cross-sectional size and shape, reduces production cost, reduces the time and cost of rework.

The application discloses a high-uniformity side-emitting optical fiber with gradient microstructure regulation and a preparation method thereof. 3+ / Er 3+ rare earth ions; the scattering light-emitting layer is made of Si / B / F / Al / Ti / Zr composite, a concentration gradient of 5% to 1% is realized in the radial direction by doping particles in the silicon-grade glass material, the refractive index is linearly reduced from 1.48 to 1.42, and the light field is guided to penetrate; and the cladding layer is a periodic gradient-depth micro-groove array, the groove depth is linearly increased from 2 to 5 microns along the axial two ends to the center, the interval is linearly decreased from 50 to 10 microns, and the optical transmission attenuation is compensated. The application realizes the structural cooperative design and process optimization, simplifies the preparation process and reduces the cost.

The utility model discloses a variable inductance magnetic core, include: first magnetic core, it is sleeve -shaped arrangement, and the inner wall perimeter circle of first magnetic core has a plurality of first V type groove along the length direction of first magnetic core setting, second magnetic core, it is cylinder -shaped arrangement, and the outer surface perimeter circle of second magnetic core has a plurality of second V type groove along the length direction of second magnetic core setting, the second magnetic core is embedded in first magnetic core, and there is a gap between first magnetic core and second magnetic core, and the fixed structure for fixing the relative position between first magnetic core and second magnetic core is equipped in the gap. The scheme is through the nesting design of first magnetic core and second magnetic core, and combines V type groove design, realizes the wide range adjustment of inductance and the optimization of magnetic circuit.

This utility model discloses a light pattern control system and a lighting device. The light pattern control system includes: a central light source; peripheral light sources arranged around the central light source; a light pattern control component, which outputs a light pattern control trigger signal when triggered; and a light source drive control circuit, the input terminal of which is connected to the light pattern control component, and the output terminal of which is connected to the controlled terminals of the central light source and the peripheral light sources. The light source drive control circuit is used to adjust the brightness ratio of the central light source and the peripheral light sources; or adjust the total power of the central light source and the peripheral light sources; or adjust both the brightness ratio and the total power of the central light source and the peripheral light sources when it receives the light pattern control trigger signal. This utility model solves the problem that lighting devices have only one means of adjusting the light pattern, making it impossible to adjust both floodlighting and ambient lighting within the same lighting device.

This application relates to a self-controlled shot sorting device, including a feeding mechanism and multiple shot sorting mechanisms. The feeding mechanism includes a central silo and multiple discharge pipes. The central silo is used to hold shot pellets, and its bottom is connected to the discharge pipes. The discharge pipes are equipped with electric valves. Each shot sorting mechanism includes a distribution silo connected to the discharge pipes, and a first level sensor is installed inside the distribution silo. This application improves the feeding efficiency of shot sorting by setting up a central silo and coordinating the first level sensor with the electric valve.

The utility model relates to the technical field of vacuum pump structures, and discloses a vacuum pump structure of a vacuum sewage suction truck, which comprises a water ring vacuum pump and a filter pipe, a multi-pole magnetizing inner magnetic sleeve is mounted in the filter pipe, a filter screen II is fixedly mounted in the multi-pole magnetizing inner magnetic sleeve close to the upper side, and a filter screen II is mounted in the filter pipe. Uniformly distributed alignment holes are formed in the second filter screen, a multi-pole magnetizing outer magnetic sleeve attached to the outer side of the filter pipe is installed on the outer side of the filter pipe, a filter seat is fixedly installed at the position, on the upper side of the multi-pole magnetizing inner magnetic sleeve, of the inner wall of the filter pipe, and a first filter screen is installed in the filter seat; a fixing rod is fixedly connected to the middle of the upper end of the second filter screen, and the upper end of the fixing rod penetrates through the first filter screen and is fixedly connected with an indicating piece. The vacuum pump structure of the vacuum suction-type sewer scavenger can flexibly adjust the filter pores, effectively block impurities and facilitate observation and maintenance, and has important significance in improving the working performance of the suction-type sewer scavenger and reducing the maintenance cost of equipment.

A permanent magnet type stepless variable load vibration isolation platform based on lead screw synchronization comprises an upper top plate, a lower bottom plate, a stepless magnetic field adjusting mechanism, a positive stiffness vibration isolation mechanism and a negative stiffness vibration isolation mechanism, and the stepless magnetic field adjusting mechanism, the positive stiffness vibration isolation mechanism and the negative stiffness vibration isolation mechanism are arranged between the upper top plate and the lower bottom plate. One end of the positive-stiffness vibration isolation mechanism and one end of the negative-stiffness vibration isolation mechanism are connected with the upper top plate, the other end of the positive-stiffness vibration isolation mechanism and the other end of the negative-stiffness vibration isolation mechanism are coupled with the stepless magnetic field adjusting mechanism, and the stepless magnetic field adjusting mechanism achieves coefficient adjustment of the positive-stiffness vibration isolation mechanism and the negative-stiffness vibration isolation mechanism by synchronously adjusting magnetic fields in the x-axis direction and the y-axis direction. And therefore, stepless vibration isolation of the upper top plate to the lower bottom plate is realized. The distances between all the mutually-exclusive permanent magnets are continuously adjusted at the same time by rotating the lead screw, rigidity adjustment of the vibration isolation device under different loads is achieved, coupling adjustment of the positive rigidity and the negative rigidity is achieved by designing the slotting curve of the slotting disc, and the quasi-zero rigidity characteristic of the vibration isolation platform is guaranteed.

The utility model relates to the technical field of irrigation, in particular to water and fertilizer integrated drip irrigation equipment. Comprising water-fertilizer mixing equipment, an outlet pipe of the water-fertilizer mixing equipment is communicated with one end of a hose, the other end of the hose is communicated with a main pipe, the other end of the main pipe is blocked, a plurality of branch pipes are uniformly distributed and fixedly communicated on two sides of the main pipe along the length direction, the branch pipes are fixedly communicated with one end of a corrugated pipe, the other end of the corrugated pipe is communicated with a side pipe, and the side pipe is fixedly communicated with a drip irrigation head. The intubation tube ensures that water and fertilizer permeate into rhizosphere soil from the inside instead of flowing on the earth surface, and water is prevented from being exposed to air on the earth surface by directly conveying the drip irrigation water and fertilizer to the deep root area of the soil, so that evaporation waste is effectively reduced, and the utilization rate of water resources is improved.

The utility model provides a kind of conveying scraper that is convenient to move, it is related to scraper conveyor technical field, the utility model includes the U-shaped long frame of fixed installation on the surface of base, the inner wall of both sides of U-shaped long frame is rotatably connected with the shaft by deep groove ball bearing, bearing outer ring and U-shaped long frame interference fit, inner ring and the transition cooperation of shaft, the outer wall surface of shaft is fixedly installed with rotating plate by flat key, the side surface of rotating plate is fixedly installed with scraper conveyor, the bottom surface of scraper conveyor is fixedly installed with discharge pipe, the side surface of U-shaped long frame is fixedly installed with motor and PLC controller, the output end of motor is fixed connection through coupling and shaft, the utility model is by height adjusting device, so as to utilize motor drive shaft rotation, drive scraper conveyor to incline, realize the continuous regulation of discharge pipe height, without disassembling equipment or with the aid of auxiliary tools such as fork truck, it is convenient to quickly adapt to the silo discharge port of different height.

The utility model provides a fan blade appearance defect detection picture acquisition device, and particularly relates to the technical field of mechanical devices, the fan blade appearance defect detection picture acquisition device comprises an annular adjustable supporting frame, the annular adjustable supporting frame is composed of at least two arc-shaped ends through telescopic rods, and the inner diameter of the annular adjustable supporting frame can be adjusted to adapt to fan blades with different diameters. The annular track is arranged above the annular adjustable supporting frame, a driving motor is arranged below one end of the annular track, a sliding block is connected to the annular track in a sliding mode, an image collecting assembly is arranged above the sliding block, and a light supplementing module is arranged behind the image collecting assembly; by means of the synchronous telescopic design of the annular adjustable supporting frame and the annular track, the blade fixing support can be matched with various blades with different diameters, the problem that a traditional fixing support is poor in compatibility is solved, the annular guide track is driven by a magnetic adsorption guide rail and a gear in a meshed mode, sliding blocks are prevented from slipping or deviating, and the precision of an image collecting path is ensured.

This utility model relates to the technical field of building material processing equipment, specifically a filler feeding device for asphalt concrete production, and more particularly to an adjustable-angle filler feeder with functions of angle adjustment, crushing of brittle filler, and sealed conveying; an adjustable-angle filler feeder includes a frame with casters at the bottom; a conveying assembly, inclinedly located at the lower part of the frame, including an auger, a cage sleeved outside the auger, a first motor driving the auger to rotate, a feed hood located at the lower end of the auger, and a discharge hood located at the upper end of the auger; an angle adjustment mechanism including a frame rod and a frame plate welded to the upper part of the frame, a hanging plate and a hanging frame welded to the upper part of the cage, a connecting plate hinged between the hanging plate and the frame plate, and a cylinder with both ends hinged to the frame rod and the hanging frame respectively; the auger inclination angle is adjusted by driving the cage to rotate around the hinge point of the connecting plate through the extension and retraction of the cylinder; a screening and crushing assembly including a discharge hopper located below the frame and a grid plate laid flat on the top of the discharge hopper.

The molybdenum wire forming mechanism capable of adjusting the diameter precision comprises an equipment installation table, a heating controller and a high-frequency heating coil, the heating controller is installed at the position, close to the right side, of the upper wall face of the equipment installation table, and the high-frequency heating coil is installed on the heating controller. Two pairs of adjustable temperature control drawing structures are mounted on the equipment mounting table; the utility model relates to the technical field of metal wire forming equipment, and has the beneficial effects that the problems that the existing molybdenum wire forming process generally adopts a drawing forming mode, the drawing hole pitch and the hole diameter are difficult to flexibly adjust, a machine needs to be stopped to replace a mold when a production specification is replaced, the efficiency is low, and the production cost is high are solved; the problems that the temperature of the metal wire cannot be adjusted according to different drawing diameter stages, the drawing effect is easily affected due to the fact that the temperature does not meet the requirement, the dynamic temperature control capacity is lacked, the material grain structure is uneven due to temperature fluctuation, the mechanical property of a finished product is reduced, and the follow-up machining performance is affected are solved.

The utility model relates to a crankshaft with adjustable eccentricity, which comprises a concentric shaft (1), a first eccentric shaft (2), a second eccentric shaft (3), a first eccentric block (4) and a second eccentric block (5), one end of the concentric shaft (1) is fixedly provided with the first eccentric block (4), the other end of the concentric shaft (1) is fixedly provided with the second eccentric block (5), and the eccentric directions of the first eccentric block (4) and the second eccentric block (5) are opposite. The crankshaft assembly has the advantages that by adjusting the phase angles of the first eccentric shaft and the second eccentric shaft, the overall eccentricity of the crankshaft can be continuously adjusted within the range of 0-2a, the vibration parameter requirements of products with different sizes or weights are met, the crankshaft assembly does not need to be replaced, and the equipment adaptability is remarkably improved.

The present application belongs to the technical field of metal matrix composite modeling, and particularly relates to a particle modeling and uniform distribution method for aluminum-based silicon carbide cutting simulation, which obtains the substrate size, total volume fraction of particles, two types of particle size range, particle aspect ratio range and appearance modification coefficient, generates a reference ellipse according to the above parameters and constructs an associated polygon, forms a fusion feature particle with both the smooth characteristics of the ellipse and the angular characteristics of the polygon through Boolean operation, and adjusts the relative strength of the two characteristics by using the appearance modification coefficient; based on the substrate size and total volume fraction, the adjusted particles are uniformly distributed as two types of particles to eliminate particle interference in the distribution process; an aluminum-based silicon carbide material simulation model is generated and a finite element analysis script is output; the silicon carbide particles generated in the present application have both the smooth characteristics of the ellipse and the angular characteristics of the polygon, and the particles are uniformly distributed in the substrate.

The utility model relates to the technical field of remote controllers, and discloses a remote controller with a volume roller on the front surface, which comprises a remote controller main body shell which is made of plastic materials and is formed by an injection molding process to ensure the strength and durability of the remote controller main body shell, and the remote controller main body shell comprises a remote controller upper cover and a remote controller bottom cover, the remote controller upper cover and the remote controller bottom cover are assembled to form a containing space. According to the utility model, the volume roller is arranged on the front surface of the remote controller, so that a user can continuously adjust the volume only by rotating the roller, and compared with the traditional button type adjustment, the button does not need to be pressed for multiple times, so that the operation steps of greatly adjusting the volume are greatly simplified, the time is saved, and the operation efficiency is improved. The mode that the volume roller is arranged on the front face enables a user to feel the process and amplitude of volume adjustment more visually, the user can easily and accurately adjust the volume to the proper size according to the needs of the user, and the mastering feeling of the user on volume adjustment is improved.

The application provides an air conditioner support hanger bearing test device, belonging to the field of air conditioner installation detection. The air conditioner support hanger bearing test device comprises a connecting seat, a swing seat, an adjusting and telescopic unit and a force applying assembly. The connecting seat is used for fixing the first end of the support hanger; the swing seat is swingingly arranged above the connecting seat and the relative position of the swing seat and the connecting seat is adjusted by swinging; the adjusting and telescopic unit pushes the swing seat to swing and fixes the position of the swing seat; the force applying assembly is arranged on the swing seat and is used for connecting the second end of the support hanger and applying tension; the swing seat swings through two swing arms, so that the orientation of the force applying assembly is unchanged during the swinging of the swing seat, the position of the force applying assembly is adjusted through the swinging of the swing seat, the continuous adjustment of the relative position of the force applying assembly and the connecting seat is realized, more support hangers can be in the normal use state during the test, the orientation of the force applying assembly is unchanged during the swinging of the swing seat, and the test accuracy is ensured.

The utility model belongs to the field of radiation processing technology discloses a kind of irradiation source focusing device, including matrix, the center of matrix is provided with ray channel and transmission cavity, and ray channel and transmission cavity are communicated by through hole;Shielding blade, at least six groups of shielding blade are distributed in circle around ray channel;Driving mechanism, driving mechanism includes the rotation installation of through hole and rotation bar, shielding blade is detachably installed on rotation bar, rotation bar is driven by manual driving assembly, shielding blade uses replaceable design, shielding blade uses tungsten copper alloy material quality, thickness is 3-10mm, the through groove corresponding with rotation bar is set on shielding blade, and through groove is adapted with rotation bar;Through groove is provided with the clamping groove of symmetrical setting, and the clamping lug corresponding with clamping groove respectively is integrally formed on rotation bar.The utility model not only can realize quick high-precision focusing, but also can replace shielding blade of different material to adapt to different ray energy.

The utility model discloses a metal slitting machine with spacing regulation and control, which comprises a rack, two groups of rotating rollers are rotatably connected in the rack, a driving motor for driving the rotating rollers to rotate is mounted in the rack, and slitting knife groups are fixed on the outer walls of the rotating rollers; by means of the double-clamping design of the fixed spacer bushes and the movable spacer bushes, the slitting blades form stable three-point clamping on the outer wall of the rotating roller, namely the two spacer bushes clamp a cutter, longitudinal deviation generated in the horizontal adjusting process of the blades is effectively avoided, and the linear precision of slitting operation is guaranteed. The fixed blade groups are distributed in the middle and at two ends of the roller body to enhance the structural stability of the blade groups. And by adopting a linkage structure of the adjusting screw rod and the ejector rod, an operator can push the movable spacer bush to move through thread transmission only by rotating the adjusting screw rod, so that the continuous adjustment of the distance between the blades is realized.

The invention discloses an AC power adjustable IGBT module test system and method, and belongs to the technical field of electronic device test. The system comprises a first IGBT half-bridge module, a second IGBT half-bridge module and an AC branch. The alternating current output end of the first IGBT half-bridge module and the alternating current output end of the second IGBT half-bridge module are connected through an alternating current branch. The alternating current branch comprises an adjustable resistor unit, the adjustable resistor unit comprises a fixed resistor and a pair of antiparallel thyristors connected with the fixed resistor in parallel, and gate poles of the two thyristors are connected with the output end of the controller. According to the system, the adjustable resistor unit intelligently controlled by the thyristors is connected in series in the alternating current branch, the adjustable resistor unit is formed by connecting the fixed resistor and the pair of antiparallel thyristors in parallel, and the IGBT half-bridge module is cooperatively controlled by controlling the conduction angle and the on-off state of the thyristors, so that the IGBT half-bridge module can be switched on and off. And the loop equivalent resistance of the alternating-current branch is changed steplessly and quickly, so that the continuous adjustment of the alternating-current power is realized.

The utility model relates to vehicle technical field discloses a kind of steering gear assembly, is installed on steering wheel component, the steering wheel component includes mounting seat, the steering gear assembly includes: steering shaft, it is rotatably penetrated in mounting seat, connecting sleeve is sleeved on steering shaft, connecting sleeve is equipped with the drive shaft parallel with steering shaft;Reset piece, it is sleeved on steering shaft, and have respectively along the first reset end and the second reset end of steering shaft radial extension, first reset end and second reset end respectively with the two sides outer wall of drive shaft opposite abut;Limiting component, it is movably fixed in mounting seat, and have respectively with the limiting structure of first reset end and second reset end abut, and limiting structure can promote first reset end or second reset end when limiting component moves to drive steering shaft rotation.The utility model's advantage lies in, assembly precision is high, easy to adjust and simple structure.

This invention discloses a biodegradable polyurethane elastomer, its preparation method, and a force-electro-coupled artificial blood vessel, belonging to the field of biomedical materials. The process includes: mixing soft segment glycol and functionalized chain extender 1 under nitrogen protection, reacting under stirring and heating conditions, and then cooling to obtain reactant a; adding diisocyanate to continue the reaction to obtain a polyurethane prepolymer; dissolving functionalized chain extender 2 in solvent a, adding it dropwise to the prepolymer to obtain reactant b, precipitating it in solvent b and vacuum drying to obtain the biodegradable polyurethane elastomer. This invention uses bioactive molecules with anticoagulant and anti-inflammatory effects as functionalized chain extenders, endowing the biodegradable polyurethane elastomer with a stable structure and piezoelectric properties. The artificial blood vessel can achieve continuous dynamic regulation of the regenerative microenvironment throughout the entire degradation cycle, continuously releasing anticoagulant and anti-inflammatory bioactive molecules, which has significant clinical application value.