207results about How to "The adjustment method is simple and convenient" patented technology

The invention discloses an automatic tapping machine and relates to a processing device used for processing internal screw threads. The automatic tapping machine disclosed by the invention comprises a PLC (Programmable Logic Controller) control circuit, a machine base 051, a marble slab 052, an instrument lathe 053, a positioning adjustment device 054, a limiting device 055, a feed device 056, a tapping device 057, a clamping device 058 and a deceleration motor 059, wherein the marble slab is arranged on the machine base, the positioning adjustment device and the instrument lathe are fixed onthe marble slab, and the deceleration motor is arranged at one side of the instrument lathe. Being controlled by the PLC control circuit, the feed device quickly conveys workpieces, the limiting device ensures the workpieces to be accurately clamped, and the tapping device completes the accurate positioning of screw taps and is matched with the clamping device to complete the tapping process. Theinvention aims to provide the automatic tapping machine to solve the technical problem that manual intervention is needed in the processes of feeding, positioning, clamping, tapping and loosening, and through the invention, the processing speed and the processing accuracy are improved.

The invention relates to a novel ammunition suspending vehicle and relates to the field of military equipment. The vehicle comprises a vehicle body and two pairs of Mecanum wheels which are arranged at two ends of the vehicle body; the vehicle further comprises a lifting mechanism, a holding mechanism and four walking drive mechanisms; the four walking drive mechanisms are arranged in the vehicle body, are connected to the Mecanum wheels respectively and are used for driving the Mecanum wheels; the middle of the vehicle body is provided with a square hole used for accommodating a lifting mechanism, and the side walls of the square hole are provided with a pair of first sliding grooves along the length of the vehicle body; the lifting mechanism comprises a sliding rod, an ejecting seat, two parallel crossing rod groups and a lifting drive mechanism; the holding mechanism comprises a base plate, a pitching platform, a horizontal moving platform, a hanger tray, an adjusting handle, two tensioning hand wheels, two pairs of pitching and adjusting bolts and a plurality of stretching springs. The vehicle has the advantages of fine using effect and high operation reliability.

The invention discloses a method for installing a prefabricated pier column component of a prefabricated bridge. The prefabricated pier column is correctly assembled and placed on a bearing platform which is poured in advance, and pier column bed mortar is arranged between the prefabricated pier column and the bearing platform. The method includes the steps that before the prefabricated pier column takes its place, a butt joint mark is marked; according to the marked height, a center cushion block is placed; after the prefabricated pier column hung is inserted into a reserved rebar on the bearing platform, the butt joint marks are aligned one by one; jacks for adjustment are placed, and a crane unloads force and lowers the prefabricated pier column to the center cushion block; the perpendicularity of the prefabricated pier column is adjusted by the jacks until meeting design demands, the jacks are locked, and piston stroke and the thickness of the pier column bed mortar are recorded; the prefabricated pier column is lifted away; a grouting template for preparing the pier column bed mortar is installed on the bearing platform, a grouting material is prepared based on the measured data of the thickness of the pier column bed mortar, and the pier column bed mortar is grouted and formally takes place; then the crane lowers the prefabricated pier column, the prefabricated pier column is in the right place, the jacks are locked, mortar is grouted for maintenance through grouting holes, and installation is completed.

The invention relates to the field of material screening, and discloses a screening machine. The screening machine comprises a machine body; a feed port is formed in the top of the machine body; opening and closing plates are hinged to the two ends of the feed port, and are commonly connected with an adjusting device for adjusting a feeding quantity; two crushing rollers are mounted at the top ofthe machine body; cams are mounted on rotating shafts of the two crushing rollers; two screens are movably connected into the machine body; multiple connecting springs are arranged between the two screens; support devices and shaking devices are arranged at the left and right ends of the two screens; the shaking devices can be triggered when one ends of the screens are pressed down; a gathering port is formed in the bottom of the machine body; an induction device is arranged below the gathering port; and the induction device cooperates with the adjusting device. The screening machine can adjust the feeding quantity of materials according to a discharge quantity of the materials, prevents the phenomenon of low screening efficiency caused by higher loads of the screens, and can gradually scatter the materials to prevent accumulation of the materials on the screens.

The invention relates to a wall surface leveling system and leveling method, and problems that for the existing wall surface lightgage steel joist leveling mode, the mounting structure is complex, the space occupied by the leveling basement layer is relatively large, and the leveling mode is not suitable for being applied to a small space are solved. A plurality of vertical joists are arranged between a heaven joist and an earth joist in an embedded manner, the upper and lower ends of each vertical joist are respectively clamped into U-shaped grooves of the heaven joist and the earth joist, each vertical joist has a U-shaped cross section, the opening side of each vertical joist faces the wall surface, a plurality of adjusting blocks are arranged in a U-shaped groove of each vertical joist from top to bottom, the central part of each adjusting block is provided with a screwed hole, an adjusting stud is arranged in each screwed hole in an adjustable manner, the inner end of each adjusting stud abuts against the wall surface, the center of each adjusting stud is provided with a bolt hole, and a bolt fixing the adjusting stud on the wall surface is arranged in a manner of traversing the corresponding bolt hole. The vertical joists are supported by side surfaces of the adjusting blocks, and therefore the wall surface can be leveled quickly, the adjusting mode is simple and convenient, the space occupied by the leveling process is small, and the indoor space utilization rate is increased.

The invention relates to the field of geriatric rehabilitation training equipment, and particularly relates to rehabilitation training equipment applied to ageing resistance of legs and feet of old people. The rehabilitation training equipment comprises a bedstead; the bedstead is fixedly provided with sliding rods; a fixed seat stand is fixedly arranged at one ends of the sliding rods; a seat plate is fixedly arranged on the fixed seat stand; a backrest capable of regulating an angle is arranged on the seat plate; the other ends of the sliding rods are in sliding connection with a sliding seat; brackets are fixedly arranged on the sliding seat; a flat plate is fixedly arranged at the upper ends of the brackets; the flat plate is hinged with pedals; bandages are fixedly arranged on the pedals; a speed limiting mechanism is arranged on the sliding seat; the speed limiting mechanism can be connected with the sliding rods; a wooden support is arranged between the fixed seat stand and thesliding seat; the wooden support is respectively in hinged connection with the fixed seat stand and the sliding seat by two pulling rods; massage mechanisms are arranged at the middle parts of the pulling rods; and the massage mechanisms are connected with the middle part of the bedstead by pulling ropes. The rehabilitation training equipment applied to ageing resistance of legs and feet of old people implements training on legs of old people so as to improve strength of legs of old people and improve functionality, thereby taking an anti-ageing effect.

The invention discloses a micropore rapid detection method based on luminous flux and a device; according to the method, a current measured value corresponding to luminous flux passing through a micropore to be measured is compared with a current standard value corresponding to luminous flux passing through a standard micropore to determine the quality of the micropore to be measured; high-efficient and accurate measurement of geometrical parameters of the micropore is realized, and actual demand for micropore rapid detection in the industrial field is effectively solved. The disadvantage is solved that when traditional micropore measurement is performed based on microscopic image technology, measurement results can not comprehensively reflect the geometrical morphologic characteristics of a long and thin micropore within an action length range due to the limitation of the depth of field of the optical system. The method and the device of the invention can effectively determine whether dirt or burr exists on the micropore inner wall, whether the micropore dimension is out of tolerance, whether the micropore is worn, and the like.

The invention provides a method for preparing a nickel-aluminium base alloy cellular material. Ni powder with a grain diameter ranging from 1 to 10 mu m, aluminium powder with a grain diameter ranging from 10 to 100 mu m and sodium chloride with a grain diameter ranging from 0.01 to 1 millimeter are mixed according to certain weight percentage and are cold pressed and molded at a pressure of 500 to 600 MPa; next, the mixture is low-temperature sintered at 500 DEG C to 650 DEG C; afterwards, a pore-forming agent is removed at an intermediate temperature ranging from 800 DEG C to 950 DEG C; finally, the mixture is high sintered at 1000 DEG C to ensure that the intermetallic compound completely forms Ni3Al phase. The technique method is simple, has convenient operation, low production cost, controllable sizes of pores, evenly distributed pores and adjustable degree of porosity, is suitable for the industrial production, protects the environment and can replace the prior cellular reactor material production technique.

The invention provides a test stand for testing a comprehensive brake property of a brake pad of a high speed train. After extending out via a rolling bearing, a shaft of a servo motor is connected with a brake disc; and a cylinder is mounted on a sliding seat in the transverse direction, an output shaft of the cylinder is connected with a push rod after a spring sleeves the output shaft of the cylinder, the push rod penetrates out from a linear bearing and then is successively connected with a three-directional force sensor, a pad support and a mounting plate, a three-directional accelerationsensor is mounted on the mounting plate, friction blocks in different sizes and shapes are fixed on the mounting plate, the sliding seat is in sliding fit with a first supporting seat, a ball screw is longitudinally mounted on the first supporting seat, and a sliding table is fixed on a nut of the ball screw. A base is provided with a thermal imager and a microphone. The test stand has the advantages that the mounting plate is convenient to change, a friction radius is convenient to adjust, functions of vibration resisting and jitter resisting are fulfilled, and the stability of the test stand and the accuracy of tests are improved.

The invention discloses a clamping and positioning mechanism for cutting a bearing inner ring. The clamping and positioning mechanism comprises a housing, wherein a plurality of inner clamping blockswhich are distributed in a central symmetry mode are arranged at the top of the housing, a plurality of inner screw rods which are distributed in a central symmetry mode are arranged inside the housing, and inner sliding rods which are fixedly connected with the bottoms of the inner clamping blocks sleeve the surfaces of the inner screw rods. According to the clamping and positioning mechanism, the inner wall and the surface of the bearing inner ring can be switched for machining, the adjusting mode is relatively simple and convenient, the machining range of a clamp is expanded, the clamp doesnot need to be replaced, the machining time is saved, and the machining of the bearing inner ring is facilitated.

The invention discloses an angle adjustment device which comprises a ratchet wheel, sliding blocks which are provided with outer gears, a cullis which can rotate relative to the ratchet wheel and an expansion and contraction mechanism; the expansion and contraction mechanism comprises a flange and wedge blocks, wherein the flange is arranged on the cullis, and each wedge block is arranged between the flange and each sliding block, and each wedge block is in abutting connection with the flange through an elastic part in circumferential direction; the inner end of the sliding block is matched with the wedge block for self-locking in radial direction, the circumferential self-locking surface of the flange is matched with the wedge block for self-locking in radial direction, and the self-locking angles are both greater than zero; when the wedge blocks move in the direction of resisting the elasticity of the elastic parts, the wedge blocks and the sliding blocks all move to the center of the flange. The angle adjustment device solves the contradiction between the full-stroke self-locking and the unlocking stroke increase, the operating experience of the user is improved, so that the unlocking process is simple and convenient, and easy to achieve. The invention further discloses a seat comprising the angle adjustment device, and the operation effect of the user is good.

The invention discloses an asphalt paving device for highway mechanical construction, and relates to the technical field of highway machinery. The asphalt paving device for highway mechanical construction comprises a shell, a sweeping mechanism, an overturning discharging mechanism, a heating and mixing mechanism, a distance adjusting mechanism and a damping protection mechanism are arranged on the shell, the shell is of a hollow structure with openings in the top and the two sides, two sets of holes are formed in the outer surface of the bottom of the shell, mounting rods are rotatably mounted on the inner walls of the holes, and two sets of moving wheels are fixedly mounted on the outer walls of the mounting rods. The invention discloses an asphalt paving device for highway mechanical construction. The asphalt falling on the feeding blades can be uniformly pushed to the ground while the automatic blanking function is realized; and meanwhile, the discharging speed of the asphalt can be changed by adjusting the telescopic length of an electric push rod, operation is easy and easy to understand, and application and popularization are convenient.

The invention discloses a welding fixture tool with an adjustable angle, and belongs to the technical field of welding fixture tools. The welding fixture tool with the adjustable angle comprises a bottom plate, wherein a left stand column and a right stand column are vertically installed on the upper surface of the bottom plate in a bilateral symmetry mode, a left positioning module is detachablyinstalled on the front portion of the left stand column, and a workpiece II is clamped on the left positioning module through a positioning clamp I; and a right positioning module is detachably installed on the front portion of the right stand column, and a workpiece I is clamped on the right positioning module through a positioning clamp II. A positioning hole is transversely formed in the middleof the left stand column, and a plurality of sets of adjusting holes are further formed in the left stand column at equal intervals, so that the left positioning module fixed on the left stand columncan realize angle adjustment. An arc-shaped sliding groove is formed in the middle of the right stand column, the angle of the right positioning module is adjusted along the sliding groove through afront fastening knob and a rear fastening knob, and the position of the right positioning module is fixed, so that the angle adjustment is accurate, and the alignment degree of the front ends of the workpiece I and the workpiece II is good.

The invention discloses an automatic pipe feeding mechanism of a filling production line which has the advantages that the structure is ingenious, the application method is simple and practicable, the application range is wide; when toothpaste pipe (or other flexible pipes) leave a bin, only single toothpaste pipe (or other flexible pipes) falls in turning plates each time the automatic pipe feeding mechanism is opened. The automatic pipe feeding mechanism comprises the turning plate, a turnover device and a pair of pipe storing devices, wherein each pipe storing device comprises a vertical plate, a storing bin and a pipe charging groove; the storing bins are connected to the surfaces of the vertical plates fixedly, a pipe charging opening is formed in the bottom of the side (close to the turning plate) of each storing bin, and the bottom surfaces of the pair of storing bins are arranged in an inclined manner and both downwards point to the turning plate; quantitative pipe charging switches which are connected to the surfaces of the vertical plates are arranged above the pipe charging grooves. The automatic pipe feeding mechanism provided by the invention has the advantages that the single toothpaste pipe only falls in the turning plates each time of pipe charging by virtue of the quantitative pipe charging switches, a situation that a starting working procedure on the production line can generate an error is avoided, the operation stability and work efficiency of the whole production line are greatly improved, the structure is stable, the using effect is good, and the application range is wide.

The invention relates to the technical field of hardware machining, and discloses a hardware drilling device. The hardware drilling device comprises a transmission box, wherein a first motor is fixedly installed at the bottom of the transmission box, an output shaft of the first motor penetrates through and extends to the inner top wall of the transmission box, the outer side of the output shaft of the first motor is movably connected with a transmission belt wheel, and the other side of the transmission belt wheel is movably connected with a rotating shaft. According to the hardware drillingdevice, through the cooperation of a second motor and a reduction gear box, the first motor is enabled to work by controlling a control panel, after the first motor is started, the transmission belt wheel is driven to rotate, the transmission belt wheel drives a drill bit on the rotating shaft to rotate, meanwhile, the reduction gear box can reduce the rotating speed of an output shaft of the second motor, the drill bit can be conveniently adjusted to the required direction, drilling work is carried out by adjusting the height of a first hydraulic rod, manual operation by workers is avoided inthe using process, so that the purpose that the position of the drill bit is conveniently adjusted so as to realize convenient operation is achieved.

The invention provides head-mounted display equipment in order to adjust the positions of effective display areas of display modules according to the positions of the pupils of a user and improve theadjustment convenience. The head-mounted display equipment comprises a frame and two display modules arranged on the frame. The two display modules are arranged corresponding to the two eyes of a userrespectively. Each display module comprises a display screen, a free-form surface lens and an adjusting mechanism, wherein the display screen is assembled on the frame in a sliding mode in a first direction, the free-form surface lens at least comprises a first optical surface corresponding to one eye of a user, the free-form surface lens is used for guiding light emitted by the display screen and projecting the light to the first optical surface so as to form an effective display area on the first optical surface, the adjusting mechanism is connected with the display screen and used for driving the display screen to slide so as to adjust the position of the effective display area on the first optical surface, and the first direction is the arrangement direction of the free-form surface lenses of the two display modules.

The invention relates to a support adjustable magnetic health pillow, and belongs to the technical field of pillows. The pillow comprises a pillowcase and a pillow core arranged in the pillowcase, wherein one side of the pillow core protrudes upward to form a cervical vertebra support part, a health magnet is arranged in the pillow core, a side hole of the pillow core is opened, an accommodation space is arranged inside, and a hardness adjusting layer is arranged in the accommodation space; The hardness adjusting layer comprises an inflatable air bag and a support part arranged in the air bag;An upper surface of the airbag is at least partially connected with an upper surface of the support portion, and a lower surface of the airbag is at least partially connected with a lower surface ofthe support portion. The support part is provided with a plurality of support holes penetrating at least one side, and the health magnet is arranged on the upper surface of the pillow core. The pillowis used for providing a comfortable sleeping environment with magnetic treatment and health care function, and the soft and hard support degree can be easily adjusted.

The invention discloses a multi-angle adjusting type belt conveyor. The multi-angle adjusting type belt conveyor comprises a bottom frame, a transmission mechanism is installed at the top end of the bottom frame, conveying mechanisms are installed on the left side and the right side of the transmission mechanism correspondingly, supporting assemblies are installed at the lower ends of the conveying mechanisms correspondingly, the other ends of the supporting assemblies are connected with the outer wall of the bottom frame, locking universal wheels are installed at the four corners of the bottom end of the bottom frame correspondingly, and second U-shaped handles are welded to the left side and the right side of the front face and the left side and the right side of the back face of the bottom frame. The multi-angle adjusting type belt conveyor is provided with the transmission mechanism, the conveying mechanisms, the supporting assemblies, a movable rod, a second foot margin support and the like, the conveying mechanisms on the two sides of the multi-angle adjusting type belt conveyor can flexibly adjust the angle, the adjusting mode is simple and convenient, and goods can be conveyed at two places with different heights, so that the application range of the multi-angle adjusting type belt conveyor is effectively widened, and the belt conveyor solves the problems that a traditional belt conveyor is single in structure and application range, and is reasonable in structural design, low in manufacturing cost and convenient to popularize and use.

The invention provides a coil used for a wireless charging device antenna. The coil comprises a micro channel coiled to be coil-shaped and liquid metal fillingthe micro channel. The liquid metal is injected into or pumped out of the micro channel by a micro injection pump connected with the micro channel, but the length of the liquid metal in the micro channel is changed, so that the strength of a generated induced magnetic field is changed, and the coil can output energy with different powers. The coil used for the wireless charging device antenna provided by the invention is simple in structure and high in applicability.

The invention provides a rapier loom which comprises a workbench, a warp let-off mechanism, a weft let-off mechanism, a slitter edge cutting mechanism and a rolling mechanism. The slitter edge cutting mechanism comprises a cutter rest, a fixed cutter body and a movable cutter body, the fixed cutter body is provided with a first blade, the movable cutter body is provided with a second blade, the fixed cutter body is fixed to the cutter rest in a height-adjustable mode, the movable cutter body is hinged to the fixed cutter body, and the first blade and the second blade abut against each other to form a cutting opening; the slitter edge cutting mechanism further comprises a motor driving the movable cutter body to rotate, a transmission shaft and a rotating disc, and the transmission shaft is controlled by the motor and fixedly connected to the center of the rotating disc; the cutter rest is provided with a longitudinal sliding groove, a sliding block is arranged in the sliding groove, a first connecting rod used for driving the sliding block to rise and fall is arranged between the sliding block and the rotating disc, a second connecting rod used for pushing and pulling the movable cutter body is arranged between the sliding block and the movable cutter body, one side of the sliding block is fixedly connected with the second connecting rod, and the second connecting rod is hinged to the movable cutter body; the other side of the sliding block is hinged to the first connecting rod, and the first connecting rod is hinged to the eccentric position of the rotating disc.

The invention belongs to the field of surgical instruments of the neurosurgery department, and discloses a dragging hook fixator for the neurosurgery department. The dragging hook fixator comprises afixator body, supporting rods, a fixing piece and a dragging hook, and the fixator body is of a U-shaped structure; several supporting rods are uniformly arranged at the lower end of the fixator body,the supporting rods comprise first connecting rods, second connecting rods, spherical connecting rods and first fastening bolts, and the upper ends of the second connecting rods are fixedly connectedwith the outer spherical surfaces of the spherical connecting rods; several fixing pieces of n-shaped structures are arranged and sleeve the fixator body from top to bottom, concave body structures are arranged on the inner end surfaces of the left and right ends of each fixing piece, and threaded holes are formed in the upper end surfaces of the fixing pieces; a dragging hook rod is of a rectangular structure, a rectangular through hole is formed in the middle of the dragging hook rod, and the dragging hook fixator for the neurosurgery department further comprises a second fastening bolt. The dragging hook fixator is simple in structure, the position of the fixator can be easily adjusted, and the fixator is applicable to the using of neurosurgery operations.

The invention belongs to the technical field of batteries, and particularly relates to a connecting structure for series connection of high-capacity single batteries, namely a positive current collecting column and a negative current collecting column are arranged on two sides of each single battery, and the positive current collecting column of one single battery is connected with the negative current collecting column of the adjacent single battery in series through a connecting assembly; clamps are arranged in two corresponding grooves in the adjacent batteries for clamping, so that a plurality of high-capacity batteries can be connected in series through the clamps and the grooves, on one hand, the connection of the high-capacity single batteries through wires is omitted through the series connection mode, and materials are saved; and on the other hand, the direct connection contact area of the positive and negative current collecting columns between the two batteries is large, so that the connection line heating between the batteries is reduced.

The invention relates to the technical field of robots, and discloses a height-adjustable combined type intelligent robot which comprises a combined type intelligent robot body. A first supporting legand a second supporting leg are fixedly connected to the left side and the right side of the bottom of the combined type intelligent robot body. The first supporting leg comprises a first supportingrod and a first connection rod, the top of the first connection rod is provided with a first storage groove, the bottom of the first storage groove is provided with a first thread groove, a first thread rod is in threaded connection with the interior of the first thread groove, a first driven gear is fixedly connected to the top of the first thread rod, and a second thread rod is fixedly connectedto the top of the first driven gear. According to the height-adjustable combined type intelligent robot, the height of the combined type intelligent robot body can be changed, the adjusting way is easier and more convenient, and the service life of the combined type intelligent robot is longer.

The invention provides a self-locking hydraulic variable-diameter threshing cylinder and a combine harvester. The self-locking hydraulic variable-diameter threshing cylinder comprises a diameter adjusting device, a hydraulic transmission device, a hydraulic pump station and a signal acquisition control system, and the diameter adjusting device is located at the inner sides of supporting radial discs at the two sides of a threshing cylinder body; and the hydraulic transmission device transmits power to the diameter adjusting device. The cylinder threshing diameter can be steplessly adjusted through the diameter adjusting device; and a controller continuously adjusts the opening degree of three-position four-way electromagnetic proportional reversing valves based on real-time feedback signals of displacement sensors to control the input and output flow of hollow hydraulic cylinders, it is guaranteed that piston rods of the two hollow hydraulic cylinders synchronously move, and the diameter of the threshing cylinder body is synchronously adjusted in real time. After the diameter of the threshing cylinder body is adjusted, the threshed cylinder diameter can be effectively locked, and the operation stability of the threshing cylinder body is guaranteed. The working performance of the combine harvester can be effectively improved.

The invention provides a stamping roller rotation angle adjusting method for a printer, which is characterized in that an approaching nut is loosened; a knob is rotated to lead a screw to be rotated and lead an internal spline sleeve arranged at the bearing periphery of the internal end of the screw and connected with the internal end of a stamping roller shaft to generate horizontal movement further; meanwhile, a pulling block arranged on the internal spline sleeve and embedded in the rectangular thread trough of the internal wall of a stamping roller cylinder is driven to move so as to lead relative rotation motion to be generated between the stamping roller cylinder and the stamping roller shaft and lead a printing plate roller to carry out the relative rotation motion, thus realizing the object of plate aligning between the printing plate rollers. The device gained by the method has a screw arranged on an external side wall plate by a thread seat; the internal end of the screw is provided with a bearing; the screw is connected with the internal end of the stamping roller shaft by the bearing and the internal spline sleeve at the periphery of the bearing; the internal wall of the stamping roller cylinder is provided with the rectangular thread trough; the internal spline sleeve is provided with the pulling block; furthermore, the pulling block is embedded in the rectangular thread trough. The adjusting mode of the method of the invention on the rotation angle adjusting of the stamping roller is direct and simple, the stroke is short and the plate aligning precision of the printing plate rollers is improved.

The invention discloses a pitch varying type small-sized wind driven generator head. The pitch varying type small-sized wind driven generator head comprises a shell, blades, a transmission assembly and a driving assembly, the shell is internally provided with a containing space and externally and fixedly provided with a rotating shaft extending outwards in the axial direction, the blades are evenly distributed on the periphery of the shell in the circumferential direction, the inner end of each blade is fixedly provided with a first bevel gear and inserted into the containing space of the shell, the outer end of each blade outwards extends out of the containing space, the transmission assembly is arranged in the containing space of the shell and comprises a driving shaft extending in the axial direction and a second bevel gear fixed to the driving shaft, the second bevel gear is in meshing transmission with all the first bevel gears at the same time to drive all the blades to rotate soas to change the inclination angles of the blades, and the driving assembly is connected with the driving shaft and can drive the driving shaft to rotate around the axial direction of the driving shaft. According to the pitch varying type small-sized wind driven generator head, the inclination angles of all the blades can be adjusted in a unified mode, the adjusting mode is simple and rapid, andthe stability of the overall structure can be guaranteed after adjustment.

The invention provides a sand making machine transmission twin-roller machine assembly and belongs to the technical field of sand making machines. The sand making machine transmission twin-roller machine assembly comprises lateral supporting plates, a first roller and a second roller, wherein the two lateral supporting plates are oppositely arranged, adjusting groove holes are arranged in the middle of the two lateral supporting plates, the first roller and the second roller are arranged between the two lateral supporting plates, the two ends of the first roller respectively penetrate throughthe corresponding adjusting groove holes on the two lateral supporting plates through a first rotating shaft, and the two ends of the second roller respectively penetrate through the corresponding adjusting groove holes on the two lateral supporting plate through a second rotating shaft. According to the sand making machine transmission twin-roller machine assembly disclosed by the invention, a fixed block is rotated and adjusted to drive a threaded rod to rotate, so that a first threaded barrel on the left and a second threaded barrel on the right can be mutually close to each other; thus, the first roller and the second roller are driven to move along the adjusting groove holes, the first roller and the second roller are mutually close to each other to reduce a gap between the first roller and the second roller, the discharging granularity is adjusted and controlled, and the sand making machine transmission twin-roller machine assembly has the characteristic of simple and convenientadjusting mode.

The invention relates to an optical device in particular to an optical filter structure, a preparation method thereof and a method for adjusting transmission characteristics thereof. The optical filter structure is formed by successively connecting a base layer, a control layer and a dielectric layer from bottom to top. Two rectangular metal nanometer blocks are embedded in the dielectric layer. The upper surfaces of the metal nanometer blocks are flush with the upper surface of the dielectric layer. The lower surfaces of the metal nanometer blocks are higher than the lower surface of the dielectric layer. The control layer is a VO2 film. The metal nanometer blocks are made of a precious metal material. The phase change of the control layer is achieved by controlling the ambient temperature of the optical filter structure, thereby changing the transmission characteristics of the optical filter structure, achieving broadband transmission, and adjusting the broadband transmission intensity and a local electric field enhanced position in the middle-infrared band. The optical filter structure is simple and convenient in preparation and use method and is easy to operate.