56results about How to "Won't derail" patented technology

The invention relates to a new-energy shared aerial rail traffic system capable of being used in air and on land and an operation method, in particular to a hydrogen-fuel new-energy aerial rail traffic system and a new-energy shared vehicle capable of being used in air and on land. The new-energy shared aerial rail traffic system capable of being used in air and on land is composed of an aerial rail system, an air-land lifting station, a new-energy rail vehicle, an unmanned open ground shared vehicle and an air-land Internet of Things intelligent operating command center. According to the new-energy shared aerial rail traffic system capable of being used in air and on land and the operation method, a hydrogen fuel power supply is adopted, environmental friendliness is achieved, pollution is avoided, the noise is low, comfortable riding and safety are ensured, and influences of rain, snow and ice are avoided; an aerial track operates rapidly, the operation plan rate reaches 99.99%, thetraffic efficiency is greatly improved, and the problem of traffic jam in cities is well solved; energy consumption is low, demolition is basically not needed, lamp posts can be replaced or green belts are utilized, and thus land is saved; and the comprehensive construction investment is low, the comprehensive operating cost is low, and the new-energy shared aerial rail traffic system is an important constituent part of urban traffic in future and can greatly change the trip mode of urban residents.

The invention discloses a laser detection device for measuring the diameter of a wheel of a railway vehicle. The laser detection device for measuring the diameter of the wheel of the railway vehicle comprises a laser transmitter, a CCD camera, a laser distance measuring sensor and a central processing control system. A detection window is cut in a main rail on which a locomotive travels; the laser transmitter and the CCD camera are installed below the detection window of the main rail, the laser distance measuring sensor is installed at the position, exactly facing the rim of the wheel, of the inner side of the main rail, the laser transmitter irradiates the tread of the wheel to form a light section shape curve representing the overall dimensions, the CCD camera obtains the light section shape curve, and transmits data to the central processing control system, the laser distance measuring sensor obtains data of the distance of the rim of the wheel through measurement, and sends the data to the central processing control system, and the central processing control system carries out calculation to obtain the diameter of the wheel. According to the laser detection device for measuring the diameter of the wheel of the railway vehicle, the laser distance measuring sensor is used for carrying out auxiliary measurement, the position of the rolling circle of the tread of the wheel is accurately located, the accurate measurement of the diameter of the wheel is achieved, the structure is simple, applicability is good, and traveling safety of trains is ensured.

The invention discloses a multifunctional push-and-pull casement window which comprises an upper window track and a lower window track, wherein the upper and lower window tracks are provided with window sashes which are pushed and pulled by a moving mechanism and horizontally opened by a rotating mechanism; the window sashes comprise upper and lower horizontal rails and left and right hooks; the upper and lower window tracks are provided with upper and lower self-locking devices for locking the moving positions of the window sashes when the window sashes are horizontally opened; the window tracks are square pipes; the opposite surfaces of the upper and lower window tracks are provided with moving notches along the length direction of the tracks; the self-locking devices comprise racks arranged at the inner bottoms of the window tracks and lock racks moving in the window tracks along with the window sashes; and the lock racks are internally provided with toothed brake blocks, return springs which act on the toothed brake blocks and press the toothed brake blocks on the racks, as well as poke rods for lifting the toothed brake blocks to enable the toothed brake blocks to be separated from the racks; when the window sashes are closed, the poke rods are touched to lift the toothed brake blocks; and when the window sashes are horizontally opened, the poke rods are released, and the return springs press the toothed brake blocks to be meshed with the racks. The multifunctional push-and-pull casement window disclosed by the invention is simple in structure, low in fault rate, convenient to maintain, and wide in market prospect.

The invention discloses a track race car. The track race car comprises a car body, a wheel driving transmission mechanism and a guide device, wherein the race car runs under the action of the wheel driving transmission mechanism. The track race car is characterized in that the guide device comprises a track locking device, a component used for driving the track locking device to rotate and an energy storage spring, wherein at lest one track locking device is installed on a car body chassis in a rotary mode, a rotation driving part matched with the component used for driving the track locking device to rotate is arranged at the upper end of the track locking device, a pair of rotary wheels clamped in a T-shaped track pitch groove are arranged at the lower end of the track locking device, and the track locking device is capable of rotating 90 degrees under the driving of the component used for driving the track locking device to rotate, and is capable of rotating 90 degrees back under the action of the energy storage spring after the driving is repealed. On the premise that the traditional track road surface driving is reserved, the track race car is provided with a self-locking track, the off-track phenomenon when the race car turns is avoided, and a front car has an automatic off-track function when a car body is impacted by a rear car.

The invention relates to a conveying system for industrial production. The system comprises a rail device fixedly connected with the ground, a transfer device and a conveying device, wherein the rail device comprises a plurality of longitudinal rails and transverse rails which are arranged crosswise; the transfer device moves along the transverse rails; the conveying device moves along the longitudinal rails; and the transfer device can transversely transfer the conveying device from one longitudinal rail to the other longitudinal rail. Compared with the prior art, the conveying system has the characteristics that: cost is low, the logistics problem of small workpiece articles can be solved, parts are clearly classified, the transfer process is clear, the articles can be well classified and flow into the next process to be processed, the system is easy to produce, manufacture and install, is suitable for the fields of various industries, does not need power and avoids energy consumption and pollution, and the like.

The invention relates a self-propelled nursery and farmland electric rail transport machine with a remote control function and an obstacle avoidance function, and belongs to the technical field of agricultural transportation machinery. The self-propelled nursery and farmland electric rail transport machine comprises a double-rail track, a transportation mechanism and a traction mechanism, where the transportation mechanism is installed on the double-rail track in a rolling mode, the traction mechanism is used for traction the transportation mechanism and has an obstacle avoidance function, a remote control function and an automatic walking function; the traction mechanism is installed on the double-rail track in a rolling mode, and the traction mechanism comprises a base, a leveling and damping assembly fixed on the base and a driving assembly fixed on the leveling and damping assembly; the leveling and damping assembly comprises an upper clamping plate, a bolt, a lower clamping plateand a first spring, wherein the bolt, the lower clamping plate and the first spring are fixed on the upper clamping plate; the upper clamping plate is fixed on the base, the lower clamping plate is provided with a through hole, one end of the bolt is fixed on the upper clamping plate, the other end of the bolt is located at the through hole of the lower clamping plate, the first spring sleeves thebolt, and the two ends of the first spring are fixedly connected with the upper clamping plate and the lower clamping plate respectively. According to the self-propelled nursery and farmland electricrail transport machine, nursery stocks, vegetables, flowers and the like can be transported, the carrying efficiency is improved, and the damage rate of crops is reduced.

The invention discloses a railway wheel online detection rail device. The railway wheel online detection rail device comprises transition region main rails, guard rails and detection region main rails. The railway wheel online detection rail device is characterized in that the transition region main rails, the guard rails and the detection region main rails are installed on guard rail tie plates in parallel. It is guaranteed that the upper surfaces of the transition region main rails, the upper surfaces of the guard rails and the upper surfaces of the detection region main rails are located at the same horizontal height. The guard rails are arranged on the inner sides of the transition region main rails and keep a distance from the transition region main rails. The detection region main rails are arranged on the outer sides of the transition region main rails, and the detection region main rails abut against the transition region main rails to form transition regions. The detection region main rails are in fastening connection with the transition region main rails through bolts in the transition regions. According to the railway wheel online detection rail device, the transition region main rails are tightly connected with the detection region main rails at equal height, so that the transition stability is ensured; the guard rails restrict wheel flanges to enable wheels not to laterally deviate too large after entering detection regions, so that the measurement accuracy is improved.

The invention relates to a high-speed bus public transportation system based on a composite special-shaped flange track, in particular to an unmanned high-speed bus public transportation system based on an upper composite special-shaped flange track and a lower composite special-shaped flange track of an H-structure base beam (1), which comprises a composite special-shaped flange track system, a high-speed bus and an operation central cloud platform, the invention provides a three-dimensional intelligent traffic solution that the urban up-and-down three-dimensional rail high-speed bus and high-speed intelligent logistics system share the rail.

The invention provides a monorail crane heavy walking trolley.The monorail crane heavy walking trolley comprises two main frame plates arranged in parallel, a reinforcing rib fixedly connected with the main frame plate is arranged in the middle of each main frame plate in the vertical direction, and the two main frame plates are connected through a supporting plate at the bottom of the reinforcing ribs; the two sides of each main frame plate are each provided with a wheel guide device and an axle base, the axle bases are used for installing axial guide wheels in the vertical direction, and reinforcing supporting lugs fixedly connected with the main frame plates are arranged above the wheel guide devices; each wheel guide device comprises a seesaw, a spherical sleeve arranged in the seesaw, a rotating shaft penetrating through the spherical sleeve and a vertical shaft penetrating through the seesaw, the spherical sleeve and the rotating shaft in the vertical direction, wherein the outer surface of the spherical sleeve is spherical, and bearing wheels axially perpendicular to the main frame plate face are installed at the two sides of the spherical sleeve on the seesaw respectively.The monorail crane heavy walking trolley is high in bearing capacity, capable of adapting to gradient rails with curves and capable of being widely applied to a monorail crane.

The invention relates to a novel assembling machine for an electrified aluminum shell grabbing mouth of a band edge convex rail spray pump, which includes a frame (6) and a convex rail lifting mechanism(2); the convex rail lifting mechanism(2) includes a convex rail fixing seat (2-1), a convex rail (2-7), a safety block device (2-2), a cam bearing follower (2-8),a lifting shaft (2-9),a linear bearing (2-4), a linear bearing seat (2-11), a first spring (2-10), a spring seat (2-14), a protection hood (2-3), a fixing seat (2-5), a directional locating block (2-6), a marble cam (2-17) and a second spring (2-18); the top edge of the convex rail (2-7) is vertically provided with a circle of convex sides (2-7-1) upwards; the lower end of the lifting shaft (2-9) is pinned with the cam bearing follower (2-8) by a follow pin (2-15); the cam bearing follower (2-8) is arranged on the top edge of the convex rail (2-7); the shape of the lower edge of the safety block device (2-2) is consistent with that of the top edge of the convex rail (2-7); the highest position of the top edge of the convex rail (2-7) is pinned with the marble cam (2-17). The electrified aluminum shell grabbing mouth of the assembling machine has high precision.

The invention belongs to the technical field of traffic, and relates to a magnetic levitation high-speed bus public transportation system based on composite special-shaped flange rails, in particular to a magnetic levitation high-speed bus public transportation system based on H-structure base beam upper and lower composite special-shaped flange rails and four-cantilever bogies. The maglev high-speed bus comprises a four-cantilever bogie, suspension systems, a supporting mechanism, a power system and the like. The left side and the right side of the bottom of the four-cantilever bogie are each provided with a set of suspension system. Supporting mechanisms are installed on the outer sides of the left suspension system and the right suspension system respectively. The upper ends of the supporting mechanisms are installed on outer supporting rails of the rail system. The passenger car box is mounted below the four-cantilever bogie; the safe operation system, the vehicle control system, the unmanned intelligent driving system and the vehicle Internet of Things system are all installed above the passenger car box or in the passenger car box. The invention provides a three-dimensional intelligent traffic solution for the common rail of the urban up-down composite special-shaped flange rail maglev high-speed bus and maglev high-speed logistics system.

The invention discloses an electric power construction device with a security fence, which comprises an electric power device, a support, a mounting hole, a reinforcing plate, a driven expansion fence, a anti-collision plate, a protective hand railing and a driving telescopic fence; according to the invention, a driving mechanism drives a lifting mechanism to rotate, the driving telescopic fence is lifted upwards through a lifting rack, so that the security fence can automatically stretch and the storage is facilitated, and the driving telescopic fence is provided with the anti-collision plate, which can avoid collision and damage of the security fence and improve the practicability. The support mechanism can strengthen the driving telescopic fence to drive the protective hand railing to rise, so that automatic decline does not appear, the security fence is small in size, can be stretched when in use, and is compact and tight instruction, the protection effect is obvious.

The invention provides a temporary traffic sign, and relates to the field of intelligent traffic. The temporary traffic sign comprises a base. Universal wheels are fixedly mounted at the bottom of thebase. A fixing seat is fixedly mounted at the top of the base. A first motor is fixedly mounted on the left side of the bottom of an inner cavity of the fixing seat. A first driving shaft is arrangedat the top of the first motor. The top of the first driving shaft is fixedly connected with a driving gear. According to the temporary traffic sign, by arranging the universal wheels, the fixing seatcan move to an intersection needing to be used at will; a threaded rod and a threaded barrel are arranged to be matched with a motor transmission system so that the sign can move up and down, a distant driver observes advantageously through upward moving of the sign, and carrying is facilitated through downward moving of the sign; a sliding rod is arranged to be matched with a sliding rail, so that the threaded barrel is stable when moving; by arranging a first limiting block and a second limiting block, the sliding rod does not derail; and by arranging a fixed pulley, an adjusting rod is notjammed when moving.

The invention relates to a carriage for a separation element, a separation element and a device. The carriage provided to hold a displaceable separation element comprises a carriage body provided with at least two running wheels, which carriage body is connected to a carrier profile, which serves to carry the separation element. According to the invention the threaded shank of an adjusting screw is rotationally held in the carriage body, which adjusting screw comprises below the screw head a flange ring, which supports a flange element provided in the carrier profile, which flange element comprises an opening, through which the screw head is guided. By rotating the adjusting screw the carrier profile can thus be optionally adjusted in height. In a preferred embodiment a tool channel is provided in the carrier profile, into which tool channel a conventional tool can be introduced. The carriage is mounted on the displaceable separation element on the front end of the cabinet main body. The invention also discloses a device for mounting a slide rail and a guide rail in the requirement of the minimum cost and the minimum space. The invention also discloss a stop buffer mounted in the requirement of the minimum cost and the minimum space.

Provided is an automatic locating perpendicular steering rail transfer steel mold trolley. Travelling wheel sets capable of rotating along a perpendicular rotary shaft are arranged at the bottom of the steel mold trolley. A transverse rail and a longitudinal rail are arranged in the shape like a Chinese character ''jing''. The staggered position of the transverse rail and the longitudinal rail is provided with a rotary rail device. The number of the travelling wheel sets is four. The transverse space and between the travelling wheel sets corresponds to the longitudinal rail. The longitudinal space and between the travelling wheel sets corresponds to the transverse rail. In the rotary rail device, a rotary rail is fixedly installed on a rotary rail disk which is rotationally connected with a rotary rail embedded part through a rotary rail rotary shaft at the bottom. According to the automatic locating perpendicular steering rail transfer steel mold trolley provided by the invention, the staggered rails are arranged, and the staggered position is provided with the rotary rail device capable of rotating, so that perpendicular steering rail transfer is achieved conveniently, the safety is high, and derailing does not occur. A locating emitter and a locating receiver are arranged and matched with a jacking device so that a steering position can be located accurately, and reliable rail transfer steering is achieved.

The invention relates to a novel opening grabbing assembly machine for an electric aluminum shell of a rotating-disk spray pump with a bump provided with edges, which is mainly used for automatically assembling the electric aluminum shell of the rotating-disk spray pump and a pump body. The assembly machine comprises a machine seat (6), a rotating disk mechanism (1) and a bump elevating mechanism (2), wherein the rotating disk mechanism (1) is arranged on the machine seat (6) and comprises a main shaft (1-1), a rotating disk seat (1-2), a pump body rotating disk (1-3) and an electric aluminum shell rotating disk (1-4); the bump elevating mechanism (2) comprises a bump fixed seat (2-1), a bump (2-7), a safety block device (2-2), a cam bearing follower (2-8), an elevating shaft (2-9), a linear bearing (2-4), a linear bearing seat (2-11), a first spring(2-10), a spring seat (2-14), a protective cover (2-3), a fixed seat (2-5), a guide positioning block (2-6), a spring cam (2-17) and a second spring (2-18). The assembly machine has the advantages of high opening grabbing precision of the electric aluminum shell and high production efficiency.

The invention relates to a novel mouth seizing assembly machine for a spray pump electrical aluminum shell, which is used for automatic assembly of a spray pump electrical aluminum shell and a pump body. The assembly machine comprises a machine seat(6), a rotary table mechanism(1), a convex rail lifting mechanism(2), a vibration tray material-feeding mechanism(3), a mouth seizing mechanism(4) and a divider mechanism(5). The rotary table mechanism (1) includes a main shaft(1-1), a rotary table seat(1-2), a pump body rotary table(1-3) and an electrical aluminum shell rotary table(1-4). The convex rail lifting mechanism (2) includes a convex rail fixing seat(2-1), a convex rail(2-7), a safety block device(2-2), a cam bearing follower(2-8), a lifting shaft(2-9), a linear bearing(2-4), a linear bearing seat(2-11), a first spring(2-10), a spring seat(2-14), a fixed seat(2-5), a guide positioning block(2-6), a marble cam(2-17) and a second spring(2-18). The mouth seizing mechanism (4) includes a guide shaft(4-1), a linear bearing(4-2), a guide seat(4-3), a joint bearing(4-3), a bottom seat plate(4-5), a handle(4-6), an eccentric wheel(4-7), a connecting bar(4-8), a seizing claw(4-9) and an upper seat plate(4-10). The machine has a high precise in assembling the pump body and the electrical aluminum shell.

The invention discloses a three-wire rail holding type high-speed maglev train system. A stator track line is mounted in the middle line of the E-shaped long track; the stator is a long stator of leftand right linear motors. A left magnetic levitation track line and a right magnetic levitation track line on two sides of the E-shaped long track are long stators of the left resultant force magneticlevitation device track and the right resultant force magnetic levitation device track; the working surfaces of the three track lines are all downward; the problems of water accumulation, sediment accumulation and garbage accumulation do not exist; when the high-speed left and right linear motors operate at high speed, the traction efficiency is high, the left and right resultant force maglev device rails of the high platform support two sides of the maglev train to enable train center of gravity to be low, magnetic levitation control system of whole vehicle is simple, the high-speed maglev train system adapts to the load of a train, the automatic stable maglev height is 10 mm, control over a whole train brake can be compatible, a conventional braking system is omitted, six rail holding faces are arranged on each of the front rail holding bogie and the rear rail holding bogie of the three-wire rail holding type high-speed maglev train system, and thus the high-speed maglev train cannot derail and is safe and reliable.

The invention relates to an elevator car door motor structure which comprises a door head, wherein a left door plate and a right door plate are arranged below the door head; a door plate guide track used for sliding of the left door plate and the right door plate is arranged below a door motor; a left hanging plate is arranged on the left door plate; a right hanging plate is arranged on the right door plate; a door coupler is arranged on the left hanging plate; a driving wheel and a driven wheel are arranged in the door head; a synchronous belt is arranged on the driving wheel and the driven wheel; the driving wheel is driven by a drive motor; the left hanging plate is connected onto the upper layer of the synchronous belt through a left connecting plate; the right hanging plate is connected onto the lower layer of the synchronous belt through a right connecting plate; a hanging plate guide track is arranged in the door head; the left hanging plate and the right hanging plate are arranged in the hanging plate guide track; guide balls are arranged on both the left hanging plate and the right hanging plate; and clamping plates are arranged on the inner sides of the left hanging plate and the right hanging plate, and clamped on the hanging plate guide track. As the clamping plates are arranged on the hanging plates and clamped on the hanging plate guide track, shaking of the hanging plates during motion and generation of noise can be reduced, smooth running can be guaranteed, and derailment can be avoided; and the elevator car door motor structure is convenient to use.

The invention discloses a new track-type electric door, which includes door leaves. An organic seat is fixed above the two door leaves. The upper end of the said machine base is provided with a motor. The outer wall of the chuck is fixedly connected with a transmission plate, one end of the transmission plate is fixedly connected with a counterweight, and the end of the transmission plate away from the counterweight is rotatably connected with a first clamper. The upper end of the first clamper is penetrated with a guide rod, and the end of the guide rod away from the first clamper is sheathed with a second clamper, and the side of the second clamper is opposite to the first clamper Both are provided with a limit ring, and the second clamper and the first clamper are provided with a locking ring on the side away from the limit ring, and both the limit ring and the lock ring are sleeved on the outside of the guide rod , the lower end of the second holder is rotatably connected with the door leaf. The invention has novel structure and stable operation, and provides an electric opening and closing door which prevents door leaves from falling.

The invention provides a physical exercise training device with a safe self-locking function, relates to the technical field of physical training equipment, and aims to solve the problems that when abdominal muscle training is carried out, especially for beginners, the training strength is difficult to master, the pulling amplitude is too large in the training process, and muscle strain or strainis caused; and the problems that a conventional installation locking device mostly locks an abdominal muscle wheel, the abdominal muscle wheel is a rotating body, and a section of path is prone to sliding during locking, so the possibility of strain still exists, and the training safety of a beginner is difficult to guarantee are solved. The device comprises a training bottom plate; and the edge of the rear end of the training bottom plate is rotatably provided with a corresponding pedal block through a hinge shaft. Due to the fact that the inner rod is sleeved with the self-locking executingmechanism in the sliding mode and provided with the clamping groove matched with the triggering plate, muscle strain caused by too large training amplitude is avoided, the brake mechanism is installedat the handheld position and can make a response within the shortest time, and the safety protection effect is improved.

The invention discloses a cable expansion and contraction device of a bridge, comprising a fixing frame, a fixing hinge seat frame and a sliding trolley. The fixing frame and the fixing hinge seat frame are respectively fixed on two adjacent box girders, and the sliding trolley and the fixing hinge seat frame are installed on the same box girder. Between that slide trolley and the fixed hinge seatframe, a cable support mechanism is arrange; The cable support mechanism comprises two spring steel plates; Three floating brackets are arranged between the upper ends of the two spring leaves; A plurality of rotary cable fixing clips are arranged on the floating bracket plate; The floating bracket plate is fixed on the spring steel plate through two splints and screws; The floating bracket plateand the splint are connected with a pin shaft; A connecting rod is respectively articulated with the lower end inner side of the two splints through a pin shaft; The fixing frame and the sliding trolley are respectively provided with cable fixing clips, and a guiding mechanism is arranged between the sliding trolley and the box girder.

The invention discloses a three-wire rail-holding high-speed maglev train system. A stator track line is mounted in the middle line of an inverted E-shaped long track; and long stators of left and right linear motors are arranged. A left magnetic levitation track line and a right magnetic levitation track line on two sides of the inverted E-shaped long track are long stators of a left resultant force magnetic levitation device track and a right resultant force magnetic levitation device track; the working surfaces of the three track lines are all downward; the problems of water accumulation, sediment accumulation and garbage accumulation do not exist; when the high-speed left and right linear motors operate at high speed, the traction efficiency is high; the left and right resultant forcemaglev device racks of the high platform support two sides of the maglev train; the train center of gravity is low, the magnetic levitation control system of whole vehicle is simple, the height of theloaded automatic stable magnetic levitation adapt to the train is 10mm, the system is compatible with control over a whole train brake, a conventional braking system is omitted, six rail holding faces are arranged on each of a front rail holding bogie and a rear rail holding bogie of the three-wire rail-holding high-speed maglev train system, so that the high-speed maglev train cannot derail andis safe and reliable.

The invention relates to a high-speed rail transit device which comprises a power cavity, a rail-holding suspension cavity and a passenger and cargo compartment, and is characterized in that the passenger and cargo compartment is of a compartment body structure; the power cavity is arranged between the passenger and cargo compartment and the rail-holding suspension cavity and is defined by a power cavity bottom plate, a passenger and cargo compartment bottom plate, a rail-holding windward plate and a shell, a power cavity air inlet is formed by an opening in the front end of the power cavity, a power cavity lower nozzle is formed by an opening in the rear end of the power cavity, the power cavity lower nozzle is reserved between the power cavity bottom plate and the passenger and cargo compartment bottom plate, the power cavity air inlet is further provided with a protective grating, and the area of the power cavity air inlet is larger than that of the power cavity lower nozzle. According to the high-speed rail transit device, the front end of a jet sucks air from the air inlet of the power cavity and then jets high-pressure air from the lower nozzle of the power cavity, the high-pressure air flows between the passenger and cargo compartment and the rail device, and an air cushion is formed between the passenger and cargo compartment and the rail device due to exhaust limitation and high air pressure to generate lift force and advancing power.

The invention relates to upper sill door head assembly equipment for an elevator. Longitudinal clearance between a roller for existing production link and a rail cannot meet design requirements, so that a condition of serious abrasion or extremely easy separation appears. The upper sill door head assembly comprises a rack and a mounting platform, wherein a first positioning structure, a second positioning structure and a third positioning structure are arranged on a front edge part and a rear edge part, so that the roller is positioned onto a mounting station which is as high as a rail of an upper sill plate and is reserved with a longitudinal gap of 0.2mm-0.5mm. In case of reserving the longitudinal gap with the rail, the roller is fixedly connected with a door hanging plate, so that the roller and the door hanging plate do not derail as a result of too great gap between the roller and the rail, the door hanging plate and the upper sill plate can be precisely and fixedly connected onto the mounting station of a landing door after being mounted, and the roller and the rail further can be guaranteed to be free of a severe wear condition as a result of tight fit, and therefore, the service life of an upper sill door head is effectively prolonged.

The invention relates a self-propelled nursery and farmland electric rail transport machine with a remote control function and an obstacle avoidance function, and belongs to the technical field of agricultural transportation machinery. The self-propelled nursery and farmland electric rail transport machine comprises a double-rail track, a transportation mechanism and a traction mechanism, where the transportation mechanism is installed on the double-rail track in a rolling mode, the traction mechanism is used for traction the transportation mechanism and has an obstacle avoidance function, a remote control function and an automatic walking function; the traction mechanism is installed on the double-rail track in a rolling mode, and the traction mechanism comprises a base, a leveling and damping assembly fixed on the base and a driving assembly fixed on the leveling and damping assembly; the leveling and damping assembly comprises an upper clamping plate, a bolt, a lower clamping plateand a first spring, wherein the bolt, the lower clamping plate and the first spring are fixed on the upper clamping plate; the upper clamping plate is fixed on the base, the lower clamping plate is provided with a through hole, one end of the bolt is fixed on the upper clamping plate, the other end of the bolt is located at the through hole of the lower clamping plate, the first spring sleeves thebolt, and the two ends of the first spring are fixedly connected with the upper clamping plate and the lower clamping plate respectively. According to the self-propelled nursery and farmland electricrail transport machine, nursery stocks, vegetables, flowers and the like can be transported, the carrying efficiency is improved, and the damage rate of crops is reduced.

The invention discloses a single-track transport machine for a mountain internal combustion engine. The single-track transport machine comprises a transport track, a conveyor head, an internal combustion engine and a material storage box, wherein the conveyor head and a conveying sliding seat are arranged on the outer side wall of the conveying track in a sliding mode through a multi-direction positioning mechanism, a driving mechanism is internally and symmetrically installed on the left side and the right side of the bottom of the conveying track, the left side and the right side of the driving mechanism are provided with rain blocking plates used for positioning and rain blocking, and the material storage box is internally provided with a damping and storage device used for reducing theshaking of articles. According to the single-track transport machine for a mountain internal combustion engine, the risk that the conveyor head cannot generate sliding teeth or derailment is guaranteed through the multi-direction positioning mechanism, so that erosion of external rainwater on driving gears and gear grooves can be reduced, the overall service life of the transport track is greatlyprolonged, and the damping and storage device is arranged in the material storage box, the stability of the transported articles is guaranteed, and the transport efficiency and the transport qualityare greatly improved.

The invention discloses a multifunctional push-and-pull casement window which comprises an upper window track and a lower window track, wherein the upper and lower window tracks are provided with window sashes which are pushed and pulled by a moving mechanism and horizontally opened by a rotating mechanism; the window sashes comprise upper and lower horizontal rails and left and right hooks; the upper and lower window tracks are provided with upper and lower self-locking devices for locking the moving positions of the window sashes when the window sashes are horizontally opened; the window tracks are square pipes; the opposite surfaces of the upper and lower window tracks are provided with moving notches along the length direction of the tracks; the self-locking devices comprise racks arranged at the inner bottoms of the window tracks and lock racks moving in the window tracks along with the window sashes; and the lock racks are internally provided with toothed brake blocks, return springs which act on the toothed brake blocks and press the toothed brake blocks on the racks, as well as poke rods for lifting the toothed brake blocks to enable the toothed brake blocks to be separated from the racks; when the window sashes are closed, the poke rods are touched to lift the toothed brake blocks; and when the window sashes are horizontally opened, the poke rods are released, and the return springs press the toothed brake blocks to be meshed with the racks. The multifunctional push-and-pull casement window disclosed by the invention is simple in structure, low in fault rate, convenient to maintain, and wide in market prospect.

The invention relates to the field of observation devices, and discloses a retractable roof for an astronomical telescope. The retractable roof includes a lower cover body, upper cover bodies, guide rails, racks, upper gears, a driving gear, a driven gear and the like, wherein the two upper cover bodies are located above the lower cover body, the two horizontal guide rails are respectively formedin the front side and the rear side of the lower cover body, the two racks are respectively installed on the front sides of the two upper cover bodies, the bottoms of the racks are both slidably installed on the guide rails located on the front side, and the two upper gears are respectively arranged on the two racks and are meshed with the racks; and the driving gear and the driven gear are both installed on the front side of the lower cover body, are meshed with each other, and are respectively connected with the two upper gears through a chain in a transmission mode. According to the retractable roof for the astronomical telescope, the roof capable of automatically retracting is arranged, the astronomical telescope can be taken out and received efficiently and stably before and after using, operation is convenient, and the risk of a damaged astronomical telescope caused by handling and dismounting and mounting is also lowered.