52results about How to "High efficiency transmission" patented technology

The utility model discloses a material conveying mechanism for laser welding. The material conveying mechanism comprises an adjusting clamp set, a driving motor and a conveying assembly. The adjusting clamp set comprises a fixed seat, a guide seat, a first clamping flap and a second clamping flap, and the guide seat is in sliding connection with the clamping flaps through guide pins and used for driving the clamping flaps to be opened and closed and adjusting the clamping distance; the driving motor comprises a driving motor body and a lead screw, the lead screw is sleeved with the guide base through a screw hole, and automatic adjustment of the clamping structure is achieved; the conveying assembly comprises peristaltic petals installed at the ends of the clamping petals and eccentric wheels, the eccentric wheels are driven by the output shaft sleeve to rotate, and materials are clamped and conveyed in a peristaltic mode. The mechanism can realize self-adaptive clamping and stable propelling of welding materials with different specifications, has the advantages of compact structure, stable transmission, high universality and the like, and is suitable for material precision conveying requirements in automatic laser welding equipment.

The invention discloses an opening mechanism and a weaving machine, the opening mechanism comprises a heald frame array, the heald frame array comprises a plurality of heald frames distributed along a first direction array; the support is used for being connected with a rack of the weaving machine; the linear driving module comprises at least two sets of linear driving units, each linear driving unit comprises a plurality of direct driving units, each direct driving unit comprises a stator module and a rotor module, the stator modules are connected to the support, and the rotor modules are in sliding fit with the stator modules. Each heald frame is connected to the rotor module of the corresponding direct drive unit, so that each rotor module drives the corresponding heald frame to reciprocate up and down, the direct drive units in each group of linear drive units extend in the second direction and are sequentially arranged in a staggered manner in the first direction, and the direct drive units in each group of linear drive units are arranged in a staggered manner in the second direction. The second direction is perpendicular to the first direction. According to the technical scheme, the shedding mechanism can directly and freely adjust the running stroke and state of the heald frame, and is simple and reliable in structure and stable in performance.

The utility model provides a sheet part punch tapping indexing device, including rotation indexing mechanism, rotation indexing mechanism includes the fixed baseplate of being fixedly connected with drill press concentrically, rotation indexing mechanism still includes rotation baseplate, rotation baseplate concentric indexing rotation relative fixed baseplate, and rotation baseplate drives rotation through the hand wheel drive mechanism of installation in vertical side surface, hand wheel drive mechanism drives rotation baseplate rotation through right angle bevel gear transmission, rotation baseplate concentric fixedly links nut pressure mechanism and drives nut pressure mechanism concentric rotation, and nut pressure mechanism includes support frame, and support frame realizes sheet part synchronous rotation through the concentric pressure fixed installation sheet part of nut and elastic pad. The utility model reduces sheet part punch tapping waste rate to 2%, compact structure, convenient operation, guaranteeing accuracy reduces processing cost at the same time.

The utility model discloses a kind of pusher device of improving sawing efficiency, it is related to steel pipe processing field.It includes support, push head, receiving platform and oil cylinder, support is composed of bottom plate, first side plate and second side plate, wherein, first side plate and second side plate are arranged along first direction, and respectively with base fixed connection, bottom plate, first side plate and second side plate form recess, recess is used to accommodate oil cylinder, fixed end of oil cylinder is installed in support, receiving platform is slidably arranged in the side of first side plate and second side plate away from bottom plate along recess extension direction, for covering the top opening of recess at least a part, and the surface of receiving platform away from bottom plate forms bearing surface;Push head is fixed to receiving platform, and one end protrudes from bearing surface, and the other end extends into recess and is connected with telescopic end of oil cylinder;The above-mentioned pusher device can realize automatic control, compact structure, transmission efficient and have better guarantee to worker's safety.

The invention relates to the related technical field of sewage treatment, in particular to mouthwash production sewage treatment equipment which comprises a treatment pond, the treatment pond is divided into a coagulation zone, a flocculation zone and an air flotation zone, the treatment pond is provided with a mixing and shaking assembly in the coagulation zone, and the mixing and shaking assembly stirs and mixes sewage and a coagulant to form a mixed solution; the mixing and shaking assembly comprises a shaking barrel, the shaking barrel performs conical circumferential swinging in the coagulation area, the treatment tank is provided with a shaking and feeding assembly in the flocculation area, and the shaking and feeding assembly is used for uniformly sprinkling a flocculating agent into the coagulated sewage. Through conical swinging mixing of the coagulation area, reciprocating material sprinkling and staggered stirring of the flocculation area, fan-shaped stirring and gathering scraping of the air flotation area and continuous reciprocating motion of a stirring separation assembly, it is ensured that scum is removed in time, and the situation that the air flotation effect is affected due to the fact that a scum layer is too thick is avoided; the whole structure is compact, transmission is efficient, and the treatment efficiency of mouthwash production sewage and the stability of effluent quality are remarkably improved.

The present invention relates to the technical field of municipal pipeline construction, and in particular to a road rainwater and sewage pipeline laying device, comprising a support gate seat located on a groove, a lifting mechanism is arranged under the support gate seat, the lifting mechanism comprises lifting frames arranged on the left and right sides, a front supporting mechanism is arranged on the front side of the lifting frame, a sliding support is arranged between the two lifting frames, the sliding support comprises a slide plate, a rear supporting mechanism is arranged above the slide plate, and a scraping mechanism is arranged below the slide plate opposite to the rear supporting mechanism; a laser transmitter and a laser receiver are arranged at the left and right ends of the rear side of the slide plate; the distance between the laser transmitter and the laser receiver relative to the scraping mechanism is equal to twice the flared length of the pipeline. The laser transmitter and the laser receiver are used as positioning, the lifting frame drops the pipeline into the groove, and the scraping mechanism scrapes the crushed sand and gravel into a shallow groove. When laying the pipeline, there is no need for a crane to lift the pipeline into the groove, and there is no need for manual trenching and auxiliary alignment, so the laying efficiency is improved and the degree of automation is high.

The invention discloses a structural layout spiral tendon continuum robot and a using method, and belongs to the technical field of continuum robots. The robot comprises a structural spiral guiding tendon spacing disc, a continuum backbone, a continuum guiding bone, a tendon adjustable tensioning device and a tendon winding transmission module. A plurality of structural spiral guide tendon spacing plates are mounted on the continuum backbone; the end part of the continuum backbone is mounted at one end of the continuum guide bone, and the other end of the continuum guide bone is arranged in front of the tendon adjustable tensioning device; the tendon winding transmission module is arranged behind the tendon adjustable tensioning device; the tendon sequentially passes through the structural spiral guide tendon spacing disc, the continuum guide bone and the tendon adjustable tensioning device and is connected to the tendon winding transmission module. According to the improved tendon tensioning device, the stability of tendons is guaranteed, the movement capacity of a continuum robot in a complex space environment is enhanced, and the control precision is improved.

The invention belongs to the technical field of chamfering devices, and discloses a strip-shaped steel plate four-side chamfering machine which comprises a base. The mounting tables are symmetrically and fixedly arranged on the upper wall of the base, the supporting vertical plates are fixedly arranged on the upper sides of the mounting tables, the conveying tables are fixedly arranged on one sides of the supporting vertical plates, and the integrated self-adaptive limiting conveying assemblies are arranged in the mounting tables. The four side walls of the strip-shaped steel plate can be positioned through the high-precision guiding system and the self-adaptive adjusting mechanism, the position of the chamfering and scraping cutter head is synchronously adjusted while accurate positioning of the strip-shaped steel plate is guaranteed, the traditional cognition that a chamfering machine is complex in operation and frequent in maintenance is changed, and the chamfering efficiency is improved. And the dependence of a traditional chamfering machine on steel plates with specific sizes and thicknesses is broken through, wide adaptability to the steel plates with different specifications is achieved, the number of motors needing to be operated is reduced, the control process is simplified, and energy consumption is reduced.

The utility model provides a manual point gum machine for display screen production relates to display screen production equipment technical field, include: point gum subassembly, point gum subassembly constitutes by point gum pipe, threaded rod and pump head, the pump head sliding connection is in the point gum pipe, threaded rod sets up at the top of pump head, the embedded installation of point gum pipe is equipped with visual glass, drive assembly constitutes by inside, outside drive disc, the layout is exquisite, the effect is remarkable, the first tooth groove of inside drive disc outside and the inside ring of outside drive disc mesh, realizes the collaborative operation of inside and outside disc, power transmission is efficient and stable, the second tooth groove of outside drive disc outside and the drive gear on fixed link mesh, supports through fixed link, drive gear can accurate drive outside drive disc rotation, this structure makes the drive flexible controllable of point gum pipe, can accurate regulation rotating speed and torque according to the operation demand, guarantees the smooth, accurate of point gum operation, has greatly promoted the working performance and product quality of point gum equipment.

The utility model provides an integrated bearing and an RV speed reducer using the same, the integrated bearing comprises an integrated bearing a, and a plurality of groups of integrated bearings b and integrated bearings c which are uniformly distributed along the circumferential direction of the integrated bearing a; the integrated bearing a comprises a pin wheel housing, an output side flange, an input side flange, a bearing inner ring, a rolling body and a retainer; the integrated bearing b comprises an eccentric high-speed shaft, an output side flange, a rolling body and a retainer; the integrated bearing c comprises an eccentric high-speed shaft, an input side flange, a rolling body and a retainer; the pair of bearing raceways is arranged on the pin wheel housing and the eccentric high-speed shaft, and the pair of bearing raceways is machined by adopting one-time clamping, so that the pair of bearing raceways have high coaxiality when being synchronously supported and rotated, and the stability of the bearing in the rotating process is ensured.

The invention relates to the technical field of fitness equipment, and particularly discloses an outward-rotating brushless motor transmission type walking and running machine which comprises a frame and a walking belt movably arranged on the frame. The driving piece is used for driving the walking belt to rotate, and the speed reduction module is used in cooperation with the driving piece; the speed reduction module comprises a first wheel body rotationally arranged relative to the frame and a second wheel body arranged at the output end of the driving part, the diameter of the second wheel body is smaller than that of the first wheel body, the second wheel body drives the walking belt to rotate through the first wheel body, a bearing is arranged at one end of the first wheel body, and the first wheel body and the frame are rotationally arranged through the bearing. The roller body of the running machine and the walking belt are driven to rotate in a multi-stage transmission mode to meet the use requirement, an original area for fixing a motor of a machine table can be omitted, the machine table can be thinned, cost is saved, and a part of space position can be omitted.

The utility model relates to the technical field of gear reducers, in particular to an anti-backlash gear box of a gear reducer, which comprises a connecting sleeve, an inner cavity of the connecting sleeve is fixedly connected with a spring, the bottom of the connecting sleeve is fixedly connected with an output shaft, and the surface of the connecting sleeve is fixedly connected with a driving gear. The surface of the output shaft is fixedly connected with a driven gear. The transmission device has the advantages of being efficient in transmission, low in noise and beneficial to prolonging the service life, in the actual use process, through matched use of the first thick gear, the driven gear, the first thin sheet gear, the second thick gear and the second thin sheet gear, the precise design and machining technology are adopted, gaps generated when the gears are meshed are reduced, the transmission precision and stability are improved, and the service life of the transmission device is prolonged. The anti-backlash gear box has the advantages that gear meshing clearance is reduced, impact and vibration of gears can be reduced, noise and vibration level are lowered, a machine runs more stably and quietly, and gear abrasion can be reduced by the anti-backlash gear box due to reduction of the gear meshing clearance.

The utility model discloses a kind of active air intake grille structures of saving Y direction space, it is related to active air intake grille structure technical field.The utility model includes active air intake grille body, active air intake grille body center is provided with execution motor, active air intake grille body center is fixedly connected with connecting bracket, connecting bracket is set in execution motor upper side, connecting bracket inside is provided with plastic peg, connecting bracket and execution motor are fixedly connected by plastic peg, execution motor left side and right side are inserted with output shaft, the output shaft is commonly provided with two.The utility model directly transmits rotary kinetic energy to active vane-left and active vane-right by setting active vane-left, specifically active vane-left and active vane-right have included angle in Y direction, avoid the problem of torque loss caused by the rotation of most of the market due to connecting rod driven blade, realize efficient transmission.

The utility model discloses a joint device for actuating a surgical instrument and a surgical robot. The joint device for actuating the surgical instrument comprises a driving part and a surgical part which are detachably assembled, the driving part comprises a fixed seat, a driving motor and a transmission assembly, the driving motor is arranged on the fixed seat, and the transmission assembly is assembled on an output shaft of the driving motor; the surgical part comprises an instrument base and a winding structure arranged on the instrument base, when the surgical part and the driving part are assembled, the instrument base and the fixing base are oppositely arranged, the winding structure is located at the position right opposite to the transmission assembly, and the winding structure abuts against the transmission assembly; a butt joint groove is formed in the side, facing the driving component, of the winding structure. A butt joint protrusion is arranged on the side, facing the surgical component, of the transmission assembly. And when the driving motor is in a zeroing state, the butt joint bulge is inserted into the butt joint groove. By arranging the butt joint protrusion and the butt joint groove, the driving component and the operation component can be in butt joint easily, and the assembling convenience can be improved.

The novel oil and gas recovery system comprises two supporting oil scraping tanks which are symmetrically arranged, a supporting refrigeration plate and a supporting bottom plate are installed between the two supporting oil scraping tanks correspondingly, and supporting heat conduction plates are installed on the lower surface of the supporting refrigeration plate side by side at equal intervals; supporting air guide plates are installed on the upper surface of the supporting bottom plate side by side at equal intervals, a first oil scraping plate is slidably arranged between the supporting refrigeration plate and the supporting bottom plate, a side sealing plate is slidably arranged in the supporting oil scraping box, a second oil scraping plate is movably embedded in the top of the supporting oil scraping box, and a flow guide supporting seat is installed at the bottom of the supporting oil scraping box. A recycling pipe network is installed between the two flow guide supporting seats, and an exhaust fan is installed at one end of each supporting oil scraping box, so that recycling can be prevented from being hindered in the cleaning process, oil stains can be fully scraped and concentrated together, the recycling rate of the oil stains reaches the best, the recycling difficulty is greatly reduced, the recycling effect is excellent, the oil stains are completely cleaned, and no residues exist.

This invention provides a front-end treatment device for electroplating wastewater contaminated with heavy metals, relating to the field of electroplating wastewater technology. The device includes a first treatment chamber, a transmission chamber, a mounting rod, a permanent magnet, a connecting rod, a second treatment chamber, a connecting pipe, and a stirring assembly. This invention uses neodymium iron boron (NdFeB) permanent magnets as the core element for heavy metal adsorption. These magnets possess extremely strong magnetic adsorption properties, rapidly adsorbing magnetic heavy metal ions such as iron, nickel, and cobalt, as well as pollutants containing magnetic components, from electroplating wastewater. Simultaneously, the permanent magnets are driven by a swing assembly to oscillate reciprocally at an angle of 30–60°. Combined with the opposite polarity of adjacent permanent magnets, a dynamically changing magnetic field environment is formed. This not only expands the magnetic field coverage but also avoids the formation of adsorption saturation regions, significantly improving the capture efficiency of heavy metal ions. The titanium alloy or polyvinyl chloride corrosion-resistant protective shell on the outer surface of the permanent magnets ensures magnetic stability and extends service life, guaranteeing long-term and efficient heavy metal separation.

The present invention discloses a fast disassembly double disc silage harvesting platform, the device comprises a suspension mechanism, two disc-type harvesting mechanisms are arranged side by side on the suspension mechanism, a locking connection mechanism capable of being mutually fixed with a hooking machine is arranged at the rear side of the suspension mechanism, a straw-separating mechanism is arranged at the front end of the two disc-type harvesting mechanisms, the straw-separating mechanism is fixed on the suspension mechanism, an angle-adjustable straw-supporting mechanism is arranged at the upper part of the two disc-type harvesting mechanisms, the angle-adjustable straw-supporting mechanism is installed on the suspension mechanism, and a crop conveying mechanism is arranged between the two disc-type harvesting mechanisms. The present invention can solve the problem that the current silage harvester has a complex harvesting platform structure, an unreasonable design, a poor harvesting effect, and cumbersome disassembly and assembly, which results in the silage harvester being unable to meet the needs of green fodder combined harvesting operations in small plots such as mountainous and hilly areas and paddy fields.

The invention discloses a screw top piece composite transmission type electric suction lock which comprises a base plate, a cover plate, a lock piece composite transmission mechanism, a screw electric pushing mechanism and an electric control system. The locking plate composite transmission mechanism is composed of a driving locking plate and a non-return locking plate, and the locking plate composite transmission mechanism is endowed with a reverse rotation trend through a torsion spring. The screw electric pushing mechanism drives the movable seat to move through the screw, and the unlocking top sheet at the lower part of the movable seat can respectively push the driving locking sheet to rotate clockwise for locking or push the non-return locking sheet to rotate anticlockwise for releasing; the electric control system detects the positions of the locking plate and the rack through the three microswitches and controls the motor to rotate forwards and backwards so as to achieve automatic switching of the unlocking state, the semi-locking state and the full-locking state. The locking device is compact in structure, reliable in transmission and capable of accurately recognizing and executing the locking state, the safety is improved, and the service life is prolonged.

The utility model discloses a steel plate off-line chain device which comprises a plurality of supporting structures, each supporting structure comprises two supporting chain wheels and a chain structure, the supporting chain wheels are symmetrically arranged, the chain structures are arranged between the supporting chain wheels in a meshed mode, each chain structure comprises a chain plate assembly and idler wheels, and the idler wheels are arranged on the chain plate assemblies. The two chain plate assemblies are symmetrically arranged and located on the two sides of the supporting chain wheel, and the multiple idler wheels are arranged on the chain plate assemblies in a rotating mode and meshed with the supporting chain wheel. The utility model relates to the field of steel plate offline device design, in particular to a steel plate offline chain device.

The utility model provides a second-stage RV speed reducer with three cycloidal pin wheels. The second-stage RV speed reducer with the three cycloidal pin wheels comprises a pin wheel housing, an output side flange, an input side flange, an eccentric high-speed shaft, planet wheels, the cycloidal pin wheels and an input shaft. The eccentric high-speed shaft is provided with three sets of eccentric protrusions, the phase difference of the three sets of eccentric protrusions is 120 degrees, the number of the cycloidal pin wheels is three, the outer diameter faces of the eccentric protrusions are sleeved with sliding bearings, and circular through holes c of the three cycloidal pin wheels are formed in the corresponding sliding bearings respectively. According to the RV speed reducer, the three sets of cycloidal pin wheels distributed at 120 degrees are arranged, so that in the second-stage speed reduction process of the RV speed reducer, meshing between teeth is increased, rotation is stable, torque is evenly transmitted, and the technical problems that a traditional two-cycloidal pin wheel RV speed reducer is unstable in stress in the transmission process and low in transmission precision are solved.

A toothed chain with a sealing ring sleeve, belonging to the field of chain technology, includes a toothed chain body with a sealing ring sleeve. The toothed chain body includes: an outer chain plate, an inner chain plate, a guide plate, a pin, a sleeve, and a sealing ring. The guide plate has a rectangular frame structure with a downward-protruding arc structure one at the bottom and outward-protruding arc structures two at both ends of the top. The radius of the arc structure two is R″ = R5.5-R7.5. This new invention solves the technical problems of chain slippage, tooth skipping, and excessive vibration of the chain at high speed in some models of Zhenming chains under extreme working conditions and extreme violent driving conditions. By optimizing the guide plate design and reducing the weight of the chain, the overall stability of the chain is improved, ensuring efficient transmission under various complex road conditions.

The utility model discloses an integrated drive for a forklift, which belongs to the technical field of industrial machinery and comprises a frame, a diesel engine is arranged at the top end of the frame, a transmission wheel is connected to the right end of the diesel engine, and the transmission wheel is connected with a gear oil pump through a cross universal joint. The gear oil pump is connected with an oil pressure lifting controller and a walking controller at the same time, and the transmission wheels are connected with a generator through a synchronous belt. According to the utility model, the power provided by the diesel engine can be utilized more efficiently.

The utility model relates to a small-size heavy-load electric push rod. The utility model comprises a box body, and a driving mechanism, which is arranged on the box body and is used for providing torque; the clutch self-locking mechanism comprises a clutch rotating shaft connected with the output end of the driving mechanism, a first torsional spring rotating shaft connected with the clutch rotating shaft, a torsional spring and a second torsional spring rotating shaft connected with the first torsional spring rotating shaft through the torsional spring, the first torsional spring rotating shaft can drive the torsional spring to rotate, and the second torsional spring rotating shaft can drive the torsional spring to rotate. The second torsion spring rotating shaft is further driven to rotate; the lead screw assembly is connected with the second torsional spring rotating shaft; the inner pipe is arranged in the outer pipe in a sleeved mode, and the inner pipe is connected with the lead screw assembly and is driven by the lead screw assembly to stretch out and draw back in the axial direction. The utility model has the advantages of high precision, good stability, low noise, fast speed, high transmission efficiency, large load and the like.

The invention relates to the technical field of municipal pipeline construction, in particular to a road rain sewage pipeline laying device which comprises a supporting gate seat located on a groove, a lifting mechanism is arranged below the supporting gate seat and comprises lifting frames arranged on the left side and the right side, a front supporting mechanism is arranged on the front sides of the lifting frames, and a sliding support is arranged between the two lifting frames. The sliding support comprises a sliding plate, a rear supporting mechanism is arranged above the sliding plate, and a material raking mechanism is arranged below the sliding plate and right opposite to the rear supporting mechanism. A laser transmitter and a laser receiver are respectively arranged at the left and right ends of the rear side of the sliding plate; and the distance between the laser transmitter and the laser receiver relative to the stripping mechanism is two times of the flaring length of the pipeline. The laser transmitter and the laser receiver are used for positioning, the lifting frame enables the pipeline to fall into a groove, the material raking mechanism rakes gravel out of a shallow groove, when the pipeline is laid, a crane is not needed to hoist the pipeline to the groove, manual ditching and auxiliary alignment are not needed any more, the laying efficiency is improved, and the automation degree is high.

The application discloses a cylindrical filtering assembly, a solid-liquid separator for industrial wastewater treatment and a separation method, and belongs to the technical field of solid-liquid separation equipment. The cylindrical filtering assembly comprises a circular filter cartridge, and a feeding pipe is arranged at the top of the circular filter cartridge. The circular filter cartridge comprises an annular pipe, a side filter cartridge, a blocking seat, a blocking plate, an end shell and a fixing rod. The fixing rod is coaxially arranged with the circular filter cartridge and is arranged in the circular filter cartridge. The end shell is fixedly connected with the fixing rod. A pushing block is arranged in the circular filter cartridge. Pushing rods are fixedly arranged at the two sides of the pushing block. Through linkage cooperation of the pushing block and the openable and closable blocking plate, directional pushing and automatic deslagging of solid waste are realized, and the problems of filter hole blockage and easy jamming of the pushing mechanism are relieved. The side filter cartridge is rotationally matched with a ball to clean the filter hole, the filter hole is realized on-line self-cleaning, and the continuous operation cycle is prolonged. The double-side pressure filtering assembly is used for closed extrusion of solid waste, the water content is effectively reduced, and deep dewatering is realized.

The invention discloses a rail vehicle brake release device, a control method and a storage medium, and the method comprises the steps: providing a first direction current for a release actuator of a rail vehicle in response to a brake release signal of the rail vehicle; judging whether the duration of providing the current in the first direction exceeds a preset first duration or not; and if yes, providing current in the second direction to a relieving actuator of the railway vehicle until a preset condition is met. The method is based on a time control mode, does not need to manage and control each specific travel, only needs to set the power-on time and the power-on direction according to requirements, is simple in control mode, and is high in adaptability.

The utility model relates to the technical field of ingot casting processing, and discloses an ingot casting machine aluminum waste recycling and crushing device which comprises a crushing platform, a feeding frame arranged at the top and a crushing frame arranged at the bottom. A crushing assembly is arranged on the platform and comprises a motor, the output end of the motor is connected with a main belt wheel, an auxiliary belt wheel is adjacent, and the motor and the auxiliary belt wheel are in transmission through a leather strap. And a crushing roller is connected in the shaft hole of the auxiliary belt wheel and is provided with a plurality of crushing cutters inside and outside the crushing frame. A partition seat is arranged on the inner wall of the crushing frame, and a fixed cutter is arranged on the seat and attached to the side edge of the crushing cutter. According to the arranged crushing assembly, a motor drives a main belt wheel and an auxiliary belt wheel to conduct transmission, then a crushing roller is driven to rotate, in the rotating process of the crushing roller, a crushing tool on the outer side of the crushing roller is matched with a fixed tool, crushing treatment on the aluminum waste is achieved, the crushing effect is good, and the recycling efficiency is improved; and through the arranged adjusting notches and fasteners, the position of the motor base can be adjusted, then the tensioning degree between the leather straps is adjusted, and efficient transmission of the leather straps is guaranteed.

This invention relates to an air filter, an aero-engine, and an aircraft, belonging to the field of aerospace technology. It solves the problem that existing air filters, located externally to the cabin, have weak drainage capabilities in rain and snow, limiting aircraft usability. The invention includes a support and drive unit and multiple guide plates; wherein the support and drive unit includes a support member; multiple guide plates are circumferentially arranged on the support member, and the guide plates are rotatable relative to the central axis of the support member to displace rainwater. This invention improves the drainage performance of the air filter in rain and snow.

The utility model discloses a double-suction centrifugal fan which comprises a fan shell, a fan cover and a fan cover. An impeller; the outer rotor motor is arranged in the center area of the impeller in a penetrating mode, the outer rotor motor comprises an outer rotor and a stator winding, the stator winding is sleeved with the outer rotor, and the outer rotor is connected with the impeller; and the two current collectors are symmetrically arranged at the two axial end parts of the outer rotor motor, and the current collectors are connected with the connecting shaft of the stator winding. The outer rotor motor is connected with the impeller through the outer rotor to drive the impeller to rotate, and transmission between the outer rotor motor and the impeller is simple and efficient. The outer rotor motor is arranged in the center area of the impeller in a penetrating mode, the center area of the impeller is utilized, the outer rotor motor cannot affect air inlet of the two sides of the impeller, and therefore the air inlet amount of the two sides of the double-suction centrifugal fan is consistent, the structure is compact, and the overall size is small; furthermore, the flow collector not only plays a role in guiding inlet air of the impeller, but also plays a role in supporting the outer rotor motor.

The embodiment of the invention provides a speed reducer with a gear ratio, and relates to the technical field of mechanical transmission. The speed reducer with the gear ratio comprises a front shell, the right side of the front shell is fixedly connected with a rear shell through a bolt, an input gear shaft used for providing power is installed in the middle of the front shell in a penetrating mode, the input gear shaft is connected with a motor output shaft, and an intermediate shaft body is transversely installed at the upper end of an inner cavity of the front shell; a sun wheel shaft body is transversely installed in the middle of an inner cavity of the front shell, the sun wheel shaft body and the input gear shaft are coaxially installed, and a planetary reduction gear set is installed on the right side of the surface of the sun wheel shaft body. By optimally designing the combination of the first-stage speed reduction mechanism, the second-stage speed reduction mechanism and the planetary speed reduction gear set, the function of automatically adjusting the speed reduction ratio under different working conditions is achieved, the reversing speed is increased, the hydraulic power loss is reduced, and the overall efficiency and reliability of the system are remarkably improved.