260results about How to "Great driving force" patented technology

The invention relates to a scissor type unfolding mechanism which comprises a top short rod assembly, scissor type stage group rod piece units, a bottom supporting rod assembly, a driving unit assembly and an unfolding in-place indicating switch, the unfolding mechanism is connected with an unfolded object through the top short rod assembly, and the multiple stages of scissor type stage group rod piece units are connected through hinge shafts to form a multi-stage unfolding mechanism. The long rods of the multiple stages of unfolding mechanisms are connected in sequence; the bottom supporting rod assembly is connected with the driving unit assembly, the driving unit assembly drives the bottom supporting rod assembly to achieve unfolding and folding of the unfolding mechanism, after the unfolding mechanism is unfolded, a stable triangular structure is formed through the bottom supporting rod assembly, the scissor type stage group rod piece units and the limiting devices, the structural rigidity is improved, and the unfolding mechanism is controlled to be unfolded.

The invention discloses a heat pipe, a radiator and electronic equipment. The heat pipe comprises a pipe body, a first capillary structure and a second capillary structure. A containing cavity is formed in the pipe body and used for sealing and storing working fluid. The first capillary structure is attached to the inner pipe face of the pipe body. The second capillary structure is wrapped in the first capillary structure. According to the heat pipe, the first capillary structure with large capillary pressure wraps the second capillary structure with large permeability, so that the composite capillary structure with the high-speed backflow channel is formed in the heat pipe, and the advantages of different capillary structures are fully utilized; and the working fluid in the heat pipe quickly and fully participates in circulating heat transfer of liquid phase-gas phase change, so that the heat transfer performance of the heat pipe is improved.

The invention relates to an embedded steel cable aluminum profile stretch bending supporting system which comprises an aluminum profile stretch bending machine, the stretch bending machine is composed of a clamping block, a middle supporting device, a middle connector and an end supporting device, the clamping block is used for fixing the end of an aluminum profile, and the middle supporting device is connected through a connector array and composed of a static block and a floating block; a linear driving mechanism is arranged between the static block and the middle connector, the middle connector is composed of a supporting steel cable and a fixing block, the steel cable penetrates through the static block, the end supporting device comprises a limiting block, the limiting block is fixed to the clamping block, the end of the supporting steel cable is connected with the limiting block, the linear driving mechanism is composed of an oil cylinder, and a three-way connecting cavity and a connecting driving mechanism are arranged in the static block. The middle connector comprises a middle connecting pipe and an end connecting pipe, and the end connecting pipe is connected with the end static block and the limiting block and connected with the output end of the hydraulic pump.

The invention provides a double-output air cylinder which comprises a cylinder body, a cylinder cover, a piston, a piston rod and a piston rod. A cavity is formed in the cylinder body, a partition plate is arranged in the cavity, and the partition plate divides the cavity into a front cavity and a rear cavity; the piston assembly comprises a first piston arranged in the front cavity in a sliding fit mode and a piston rod arranged on the head portion of the first piston, and the piston rod extends out of the cylinder body and serves as a first output end. The rotating assembly comprises a rotating assembly body arranged in the rear cavity, a driving shaft is arranged on the rotating assembly body, and the driving shaft penetrates through the partition plate, is in rigid connection with the first piston and can drive the piston rod to rotate in the radial direction. The double-output air cylinder is compact in structure, small in size, capable of adjusting the output shaft at any angle, high in adjusting precision, reliable and stable to use, particularly suitable for mechanical arms of non-standard equipment, and wide in application range, and has a self-locking effect.

The invention belongs to the technical field of ultrahigh strength maritime work steel plate production, and particularly relates to an extra-thick specification 460 MPa grade steel plate for ocean engineering and a preparation method thereof.The steel plate comprises, by mass, 0.08%-0.10% of C, 0.20%-0.40% of Si, 1.50%-1.65% of Mn, smaller than or equal to 0.010% of P, smaller than or equal to 0.005% of S, 0.030%-0.040% of Nb, 0.010%-0.020% of Ti, 0.26%-0.35% of Cr, 0.35%-0.45% of Ni, 0.15%-0.25% of Cu and 0.020%-0.050% of Al, Pcm is controlled to be smaller than or equal to 0.22%, and Ceq is controlled to be smaller than or equal to 0.46%. According to the 460MPa-grade ultrahigh-toughness maritime work steel plate, the upper yield strength ReH is larger than or equal to 460MPa, the tensile strength Rm ranges from 540 MPa to 720MPa, the percentage elongation after fracture A is larger than or equal to 17%, the core transverse KV2 at the temperature of minus 60 DEG C is larger than or equal to 150J, the CTOD characteristic value of base metal at the temperature of minus 40 DEG C is larger than or equal to 0.25 mm, and the CTOD characteristic value of a welding heat affected zone at the temperature of minus 20 DEG C is larger than or equal to 0.45 mm after 50kJ / cm heat input submerged-arc welding.

The invention discloses a sound production monomer and a sound production module, and relates to the technical field of sound energy conversion, the sound production monomer comprises a magnetic circuit system, a vibration system, a magnetic assembly and an elastic support member, and the magnetic circuit system forms a first magnetic gap and a second magnetic gap; the vibration system vibrates in the first direction and comprises a vibrating diaphragm, a first voice coil and a second voice coil, the first voice coil is located in the first magnetic gap, the second voice coil is located in the second magnetic gap, the first voice coil and the second voice coil are both connected with the vibrating diaphragm, and the current directions of the first voice coil and the second voice coil are the same; one end of the elastic supporting piece is connected with the magnetic circuit system, the first voice coil and the second voice coil are both connected with the other end of the elastic supporting piece, the magnetic assembly is arranged on the elastic supporting piece, and the magnetic assembly can provide acting force opposite to the restoring force of the vibrating diaphragm for the first voice coil and the second voice coil; by adding the magnetic assembly, the performance of the sounding monomer is improved.

The utility model provides a sound production device. The sound production device comprises a basin stand; the vibration system comprises a vibrating diaphragm, a first voice coil and a second voice coil, wherein the outer periphery of the vibrating diaphragm is fixed on the basin frame; the first voice coil is inserted and suspended in the first magnetic gap, and the second voice coil is inserted and suspended in the second magnetic gap; the magnetic circuit system comprises a lower clamping plate, a first central magnetic steel and a second central magnetic steel which are stacked and fixed on the lower clamping plate and are mutually spaced, a first auxiliary magnetic steel and a second auxiliary magnetic steel which are stacked and fixed on the lower clamping plate, and a special-shaped edge magnetic steel which is stacked and fixed on the lower clamping plate; the special-shaped edge magnetic steel comprises an edge magnet body, a first edge magnet and a second edge magnet, the edge magnet body is arranged between the first center magnetic steel and the second center magnetic steel, the first auxiliary magnetic steel is located on the side, away from the special-shaped edge magnetic steel, of the first center magnetic steel, and the second auxiliary magnetic steel is located on the side, away from the special-shaped edge magnetic steel, of the second center magnetic steel. Compared with the prior art, the sounding device provided by the utility model has good acoustic performance.

The invention discloses a sound production monomer and a sound production module, and relates to the technical field of sound energy conversion, the sound production monomer comprises a magnetic circuit system and a vibration system, the magnetic circuit system comprises a magnetic circuit unit, the magnetic circuit unit forms a first magnetic gap and a second magnetic gap, the magnetic circuit unit comprises a central magnetic circuit, a middle magnetic circuit and a side magnetic circuit, the middle magnetic circuit comprises a first middle magnetic circuit and a second middle magnetic circuit, the first magnetic gap surrounds the first middle magnetic circuit, and the second magnetic gap surrounds the second middle magnetic circuit; the vibration system comprises a diaphragm, a first voice coil, a second voice coil and a magnetic assembly, the first voice coil is located in the first magnetic gap, the second voice coil is located in the second magnetic gap, one sides of the first voice coil and the second voice coil are connected with the diaphragm, the other sides are connected with the magnetic assembly, and the current directions of the first voice coil and the second voice coil are the same. The magnetic assembly can provide acting force opposite to the restoring force of the vibrating diaphragm for the first voice coil and the second voice coil, and the performance of the sound production monomer is improved by additionally arranging the magnetic assembly.

The invention provides an aluminum / steel dissimilar metal laser melting-brazing method, and belongs to the technical field of dissimilar metal precision connection. The melting-brazing method adopted by the method is between melting welding and brazing, the high-strength structure of melting welding and the good wettability of brazing are combined, and a high-strength welding joint can be obtained. According to the method, firstly, slope-shaped grooves are machined in the butt joint sides of the to-be-welded aluminum plate and the to-be-welded steel plate correspondingly, then welding is conducted, compared with vertical face butt joint welding, the mechanical property of a connector is improved, and the air hole defect is effectively restrained; the synergistic effect of the slope-shaped half-lap-joint groove and laser melting-brazing organically unifies a welding structure and metallurgical regulation and control, improves geometric and mechanical structures, interface metallurgical reaction, microscopic component segregation and welding defects of aluminum / steel plate butt welding, and obtains a melting-brazing joint with excellent microstructure and mechanical properties.

The invention discloses a 3D printing robot constructed on a roadway sealing wall. The 3D printing robot comprises a crawler belt moving chassis, a mechanical arm, a sliding rail mechanism, a crusher, a cleaning mechanism, a telescopic mechanism, a telescopic supporting leg rod, a laser range finder, an extrusion nozzle, a conveying pipe and a camera. Wherein the mechanical arm is mounted at the center of the upper part of the crawler belt moving chassis; the telescopic mechanism is located behind the crawler belt moving chassis and provided with a sliding rail mechanism. A telescopic supporting leg rod is mounted in front of the crawler belt moving chassis; a crusher is mounted in front of the slide rail mechanism, and a cleaning mechanism is mounted behind the slide rail mechanism; an extrusion nozzle is mounted at the foremost end of the mechanical arm; the camera is positioned beside the front end of the mechanical arm; and the conveying pipe is arranged in the arm section of the mechanical arm. Compared with the prior art, the 3D printing robot can conduct wall chiseling, gravel cleaning and isolation wall building, only a very small amount of manual operation is needed in the whole process, the labor cost is greatly saved, and meanwhile the construction safety risk is reduced.

The invention discloses a sound production monomer and a sound production module, and relates to the technical field of sound energy conversion, the sound production monomer comprises a magnetic circuit system and a vibration system, and the magnetic circuit system is provided with a first magnetic gap and a second magnetic gap which are arranged at an interval along a second direction; the vibration system vibrates in the first direction, the first direction is perpendicular to the second direction, the vibration system comprises a vibrating diaphragm, a first voice coil, a second voice coil and a magnetic assembly, the first voice coil is located in the first magnetic gap, the second voice coil is located in the second magnetic gap, one side of the first voice coil is connected with the vibrating diaphragm, and the other side of the first voice coil is connected with the magnetic assembly. One side of the second voice coil is connected with the vibrating diaphragm, the other side of the second voice coil is connected with the magnetic assembly, the current directions of the first voice coil and the second voice coil are the same, and the magnetic assembly can provide acting force opposite to the restoring force direction of the vibrating diaphragm for the first voice coil and the second voice coil, so that the driving force of the first voice coil and the second voice coil to the vibrating diaphragm is effectively increased; and the performance of the sounding monomer is improved.

The invention discloses a sound production monomer and a sound production module, and belongs to the technical field of sound energy conversion, the sound production monomer comprises a magnetic circuit system and a vibration system, and the magnetic circuit system forms a magnetic gap; the vibration system comprises a voice coil, a first vibrating diaphragm, a second vibrating diaphragm and a rigid connecting piece, the voice coil is arranged in the magnetic gap, the first vibrating diaphragm and the second vibrating diaphragm are arranged on the two sides of the magnetic circuit system respectively in the vibration direction of the vibration system, the first vibrating diaphragm is provided with a first reinforcing part, the voice coil is connected with the first reinforcing part, and the first reinforcing part is provided with a first magnetic piece; the first vibrating diaphragm is provided with a first reinforcing part, the second vibrating diaphragm is provided with a second reinforcing part, the second reinforcing part is provided with a second magnetic piece, the first reinforcing part and the second reinforcing part are connected through a rigid connecting piece, and the resultant force of the first magnetic piece and the second magnetic piece acting on the voice coil is opposite to the restoring force of the first vibrating diaphragm in direction, so that the driving force of the voice coil to the vibrating diaphragms can be effectively increased; and the performance of the sounding monomer is improved.

The invention belongs to the technical field of photography and camera shooting, and discloses a ball closed-loop motor which comprises a support, a carrier and a driving mechanism. A lens is arranged on the bracket; an optical filter is arranged on the carrier, and a guide component I and a guide component II are arranged between the carrier and the bracket, so that the carrier can slide relative to the bracket along an optical axis; the driving mechanism is used for driving the carrier to move relative to the bracket; the first guide component and the second guide component are adjacently arranged, the first guide component comprises at least two first balls, the second guide component comprises second balls, and in the plane where the first balls and the second balls are located, the first balls and the second balls form a triangular structure. The first ball and the second ball are of a triangular structure in the same plane, so that the use stability of the motor is improved, and the definition of a shot picture is ensured. The invention further discloses a camera module with the ball closed-loop motor and electronic equipment with the camera module.

The utility model discloses a motor and an electric toothbrush with the same. The motor comprises a rotor assembly; the stator assembly sleeves the rotor assembly, the rotor assembly can rotate relative to the stator assembly, the stator assembly comprises a magnet yoke and a permanent magnet, the inner surface of the magnet yoke is provided with a mounting groove, and the permanent magnet is arranged in the mounting groove; and in the depth direction of the mounting groove, the size H1, located in the mounting groove, of the permanent magnet is not larger than the size H2, located outside the mounting groove, of the permanent magnet. According to the motor provided by the embodiment of the invention, the loss of magnetic induction lines of the permanent magnets is reduced while the volume of the permanent magnets is not changed, the magnetic field utilization rate of the permanent magnets is improved, and the purpose of improving the output power of the motor is achieved.

The application discloses a micro fan and electronic equipment, and relates to the fan technical field, the micro fan includes a shell assembly, a vibration plate assembly and a driving device. The vibration plate assembly divides the shell assembly into a front cavity and a rear cavity, the vibration plate assembly includes a vibrating plate with one end fixed and one end suspended, the shell assembly includes an air inlet and an air outlet which are communicated with the front cavity and the outside, and the air inlet and the air outlet form a front cavity air duct; the driving device is arranged in the rear cavity and includes a permanent magnet magnetic circuit assembly, a coil and an armature, the permanent magnet magnetic circuit assembly and the coil are fixed relative to the shell assembly, the armature includes a moving piece arranged in the coil and the permanent magnet magnetic circuit assembly, the moving piece and the vibrating plate are connected through a connecting rod, and the coil is used for driving the moving piece to vibrate; the micro fan is compact in structure, small in size, high in driving efficiency, and capable of achieving good heat dissipation effect.

The utility model relates to the technical field of pipeline conveying, in particular to a lightweight aggregate pipeline conveying system. The lightweight aggregate pipeline conveying system comprises a material conveying pipe, a plurality of evenly-distributed containing grooves are formed in the material conveying pipe, and butt joint semi-rings are installed in the containing grooves; a stirring assembly used for driving the lightweight aggregate is arranged on one side of the top of the butt-joint semi-ring and comprises a stirring supporting block, the stirring supporting block is installed on the butt-joint semi-ring, a supporting semi-ring is arranged in the stirring supporting block in a rotating connection mode, a shaft rod is arranged in the supporting semi-ring in an inserted mode in a rotating connection mode, and the shaft rod is connected with the supporting semi-ring in an inserted mode. And a shifting sheet is arranged on the outer wall of the shaft rod. According to the light aggregate pipeline conveying system, due to the arrangement of the stirring assembly, the stirring piece can be controlled to rotate, so that the stirring piece stirs the light aggregate in the conveying pipe, the driving force in the driving conveying process is increased, and the conveying efficiency of the device in the using process can be improved in an auxiliary mode.

The utility model provides a disconnected type vehicle frame and a mine truck, the disconnected type vehicle frame comprises a front vehicle frame and a rear vehicle frame, a slewing bearing is arranged between the front vehicle frame and the rear vehicle frame, the outer ring of the slewing bearing is fixedly connected to the rear end part of the front vehicle frame, and the inner ring of the slewing bearing is fixedly connected to the front end part of the rear vehicle frame; and the inner ring and the outer ring of the slewing bearing are rotationally connected. Compared with an existing integral frame vehicle, the front frame and the rear frame adopting the slewing bearing can rotate in a small range in the advancing direction, so that an axle can be in better contact with the ground, the driving force of the vehicle is increased, and the cross-country performance of the vehicle is improved; compared with an existing articulated truck that a power assembly and a transfer case are both installed on a front truck, the power assembly of the disconnected truck frame adopting the slewing bearing is installed on the front truck frame, the transfer case is installed on the rear truck frame, the size of a front overhang and a wheel base of the whole truck is small, the length of the whole truck is reduced, applicability is improved, and wide application and popularization prospects are achieved.

The invention discloses a silicon-based ceramic core capable of regulating and controlling strength based on angle-ball ratio and a preparation method thereof, the silicon-based ceramic core comprises the following substances in percentage by mass: 75-90wt% of ceramic powder and 10-25wt% of plasticizer, and the ceramic powder comprises the following substances in percentage by mass: 67-85wt% of quartz glass powder, 13-32wt% of mineralizer and 0.1-2wt% of pore-forming material. The method comprises the following steps: pretreating quartz glass powder with various particle sizes and spherical powder in aluminum oxide with various particle sizes; pretreating the quartz glass powder of each grade of particle size and the aluminum oxide of each grade of particle size according to a designed angle-ball ratio; uniformly mixing ceramic powder and a plasticizer to obtain silicon-based ceramic core slurry; and carrying out injection molding to obtain a silicon-based ceramic core green body, and roasting to obtain the silicon-based ceramic core with the strength regulated and controlled based on the angle-ball ratio. A series of silicon-based ceramic core systems with approximately linear adjustable strength can be obtained, and different requirements of different working conditions, different inner cavity structures, different alloy types and the like of blade investment casting on the strength of the ceramic core can be met.

The present invention discloses a multi-drive ultra-thin speaker, comprising a housing, a diaphragm connected and fixed to the housing, and at least two independent drive units, the drive unit comprising a voice coil unit and a magnetic circuit unit arranged corresponding to the voice coil unit, the housing comprising at least two mounting holes arranged side by side, the magnetic circuit unit being arranged in the mounting holes correspondingly, the voice coil unit being further connected and fixed with a centering support plate, the end of the centering support plate away from the voice coil unit being fixed to the housing, and a sound outlet hole for sound emission being arranged on the side wall of the housing. The multi-drive ultra-thin speaker of the present invention has a simple structure, high space utilization, a large effective radiation area, and good acoustic performance.

The present invention proposes a clutch booster with a long service life, which mainly includes a main cylinder body, a mounting plate body, a cylinder and a sub-cylinder body. A movable piston 1 is arranged in the main cylinder body, which is sealed with the inner wall, and its left end is connected with the piston 3 in the cylinder through the shaft rod 2. A mounting tube is arranged on the left side of the mounting plate body, and a sealing assembly is arranged inside the piston 3 which is sealed with the shaft rod 2. An oil passage is arranged inside the mounting plate body, which is connected with the specific space of the main cylinder body, and is connected with the oil inlet pipeline of the sub-cylinder body through the oil supply port. A sub-cylinder body is arranged at the left end of the cylinder, and the shaft rod 1 in the sub-cylinder body is sealed with the inner wall. The oil pressure, gas pressure and shaft rod thrust jointly drive the piston 1 to move to the right, and the piston 1 can drive the piston 2, and the direct drive of the piston 2 by the oil pressure is equivalent to four forces driving the piston 2. These forces enable the piston in the main cylinder body to obtain a sufficiently large driving force, which is easier to be pushed, can respond quickly and move efficiently, thereby improving the service life of the clutch booster.

The utility model relates to the technical field of switching devices, in particular to a double-coil monostable relay, which comprises a contact, a reset spring and a coil part, and is characterized in that the coil part is used for selectively switching on and off to control the contact to be closed or broken; the coil part comprises a pull-in coil and a breaking coil, the pull-in coil is used for overcoming the elastic force of the reset spring to drive the contact to be pulled in a power-on state and continuously electrifying to enable the contact to be kept in a pull-in state, and the breaking coil is used for being matched with the reset spring to drive the contact to be broken in the power-on state; therefore, monostable operation of the relay is formed and contact adhesion is prevented. According to the monostable relay, the breaking coil is arranged, and when the monostable relay is broken, the contact is driven to be broken under the combined action of the breaking coil and the reset spring, so that the driving force for breaking the contact is larger, contact adhesion can be prevented, safety accidents caused by contact adhesion are further reduced, and the working reliability and safety of the relay are improved.

The invention is applied to the technical field of cooling towers, and particularly discloses a water-saving fog dispersal cooling tower which comprises a tower body, the tower body is of an up-down through structure, the surface of the tower body is in a hyperbolic curve shape, an air inlet barrel is arranged below the tower body, a base is arranged below the air inlet barrel, a connecting barrel is arranged above the tower body, and the connecting barrel is connected with the base. And an air outlet barrel is connected to the upper portion of the connecting barrel, a driving motor is fixedly installed on the inner wall of the air outlet barrel through a support, and fan blades are fixedly connected to the output end of the driving motor. According to the water-saving fog dispersal cooling tower, the tower body is arranged to be in the hyperbolic curve shape, the air inlet barrel is arranged on the lower portion and matched with the fan blades on the upper portion to achieve the flowing path of air from bottom to top, the filler mechanism is arranged on the narrow section of the tower body, in the process that the air flows in the tower body from wide to narrow, the flow speed is increased, a thermal boundary layer on the surface of hot water is damaged, and the thermal boundary layer is thinned; the surface heat transfer efficiency is improved.

The invention relates to the technical field of coal mine screening, in particular to coal mine screening equipment for recognizing gangue through X-ray imaging and a beneficiation method.The coal mine screening equipment comprises a hopper defined by a side plate assembly and an adjusting baffle, a tray assembly and an X-ray device, the adjusting baffle can transversely move relative to the side plate assembly so as to adjust the size of the discharging opening in the lower portion so as to be matched with screening of gangue and coal mine stones of different sizes, and the extrusion assembly is matched with the adjusting baffle so that the coal mine stones and the gangue in the hopper can be discharged from the discharging opening in the stressed state. By means of the device, it can be guaranteed that coal mine stones and gangue fall onto the tray assembly in order in a single-layer mode, and then the coal mine stones and gangue on the tray assembly can be recognized, positioned and separated through the X-ray device.

The present invention discloses a device and method for producing low aromatic solvent oil by hydrogenating bio-oil. Bio-oil and Fischer-Tropsch oil are used as raw materials, and a treatment mode combining hydrodeoxygenation, hydrofining and hydrocracking is adopted; wherein, the bio-oil hydrodeoxygenation product and the Fischer-Tropsch oil hydrofining liquid phase enter the hydrocracking section and are countercurrently contacted with hydrogen to carry out a hydrocracking reaction, and the lighter part is carried away from the reactor by hydrogen and the light product obtained from the hydrocracking section leaves the hydrogenation reactor for separation. The method of the present invention allows the light component to quickly leave the system and no longer excessively participate in the cracking reaction. Since the product can quickly leave the reaction system, the positive reaction rate is increased while the yield of the target product, low aromatic solvent oil, is improved.

The water dolphin toy comprises a dolphin body, a propeller driving assembly, a rotating ball and a rotating device, the dolphin body comprises a dolphin head part and a plurality of tail section parts which are hinged in sequence, water floating structures are arranged in the tail section parts, the propeller driving assembly is arranged on the dolphin head part, and the rotating ball is arranged on the rotating device. The rotating ball is located at the mouth position of the dolphin head, and the rotating device is located in the dolphin head and can drive the rotating ball to rotate. And a balance iron rod is transversely arranged in the guinea pig head part, so that the driving stability can be improved. The toy is reasonable in structural design, the propeller driving assembly is adopted to replace a traditional fishtailing to provide power, the pushing force is large, the whole toy can rapidly run, and the toy fun is increased; the tail sections are movably connected and can dynamically swing along with fluctuation of waves, the simulation effect is good, and interestingness is achieved; meanwhile, the rotating device drives the rotating ball to rotate, and the entertainment of the toy is greatly improved.

The utility model relates to the technical field of stevioside production, in particular to a filtering device for stevioside production, which comprises a body, a feeding pipe arranged on one side of the lower portion of the body, a discharging pipe arranged on one side of the upper portion of the body, a sediment discharging pipe arranged on the lower portion of the body and a filtering component arranged on the upper portion inside the body. A rotary flow guide part is arranged below the filtering part, and two ends of the rotary flow guide part are respectively communicated with the filtering part and the sediment discharge pipe; and the pressure sensor on the feeding pipe and the discharge valve on the sediment discharge pipe are electrically connected with the controller respectively. The filtering device with the structure can be used for effectively filtering insoluble substances in stevioside feed liquid, can also be automatically cleaned, is simple and convenient to operate, and greatly improves the working efficiency.

This utility model discloses a novel sintering tungsten ...

The present invention discloses a driving mechanism of a pneumatic clamp, comprising a ventilation block and two groups of cylinder assemblies that are on the same straight line and symmetrically distributed on both sides of the ventilation block. The cylinder assembly comprises a cylinder and a piston rod; one end of the piston rod in the cylinder is provided with a piston part, and the other end is connected to the ventilation block; the piston part divides the inner cavity of the cylinder into a cavity space one and a cavity space two that are independent of each other; inside the piston rod, there are provided an air passage one that is connected to the cavity space one and an air passage two that is connected to the cavity space two; the ventilation block is provided with a ventilation passage one and a ventilation passage two that are connected at both ends and are independent of each other; one end of the ventilation passage one is simultaneously connected to two air passages one on different piston rods, and one end of the ventilation passage two is simultaneously connected to two air passages two on different piston rods. The present invention does not need to add an external air intake duct, which can save installation space and improve the synchronization of the operation of the two clamps.

The invention belongs to the technical field of welding auxiliary equipment, and discloses a steel lattice beam submerged-arc welding jig frame device which comprises a bottom plate. A pair of symmetrically-arranged supporting plates is fixed to the bottom plate, and a horizontally-arranged rotating shaft is fixed between the two supporting plates. A square shaft is arranged above the two supporting plates, the central axis of the square shaft is perpendicular to the central axis of the rotating shaft, the two ends of the direction pipe are symmetrically arranged relative to the rotating shaft, the lower end face of the square shaft is fixedly connected with a hinge piece, the lower end of the hinge piece is rotationally arranged on the rotating shaft in a sleeving mode, and when the square shaft is horizontally arranged, the upper end face of the square shaft is parallel to the bottom plate. Supporting legs are fixed at two ends of the square shaft; the cross beam can be inclined by 45 degrees conveniently, the opening end of the included angle between the upper end face of the web and the wing plate located below the web is vertically placed upwards, enough space is reserved over the included angle between the web and the wing plate, a submerged-arc welding gun can directly face a splicing seam to conduct welding conveniently during welding, and therefore the welding quality and the construction efficiency are improved.

The invention discloses a main shaft rotating mechanism of a heading machine and a working method of the main shaft rotating mechanism. The main shaft rotating mechanism comprises a fixed connecting seat, a hydraulic motor, a planetary reducer, a pinion shaft, a slewing bearing inner gear rotor bearing, a slewing bearing stator and a rotating connecting seat, the upper end of the fixed connecting seat is fixedly connected with a heading machine propelling mechanism, the lower end of the fixed connecting seat is fixedly connected with a slewing bearing stator, a slewing bearing inner gear rotor bearing is fixedly connected with the upper end of the rotary connecting seat, and the lower end of the rotary connecting seat is connected with a drill bit or a cutter head; the hydraulic motor is in driving connection with the planetary reducer, the planetary reducer is mounted on the fixed connecting seat and is in driving connection with the pinion shaft, the pinion shaft is in gear transmission connection with an inner gear of the slewing bearing inner gear rotor bearing, and the slewing bearing inner gear rotor bearing is mounted in the slewing bearing stator. A main shaft rotating mechanism is designed to be lightweight, a heavy slewing bearing with inner teeth is selected as a main bearing, the overall structure is compact, the occupied axial space is small, and the impact resistance is high.