83results about How to "Transmission structure is stable" patented technology

The invention relates to an intelligent lock and a method. The intelligent lock comprises a shell, a lock tongue, a handle, a main lock driving mechanism, an auxiliary lock driving mechanism and a control unit. The main lock driving mechanism and the auxiliary lock driving mechanism are connected with the control unit, the control unit is connected with an electronic key in a wireless mode, and the main lock driving mechanism is connected with the handle; the lock tongue is transversely installed in the shell, the main lock driving mechanism and the auxiliary lock driving mechanism are installed on the portions, at the two sides of the lock tongue, in the shell respectively, a lock cylinder is installed on the portion, at one side of the auxiliary lock driving mechanism, in the shell, a cam is coaxially installed on the lock cylinder, the main lock driving mechanism and the auxiliary lock driving mechanism are connected with the lock tongue and can drive the lock tongue to move transversely to achieve unlocking. The intelligent lock integrates electronic and mechanical unlocking modes, an electronic lock body is used normally, and when the electronic lock breaks down, a mechanical lock body is started. By means of the unlocking mode of the intelligent lock, technological lock picking mechanically carried out on the lock cylinder transmission part can be effectively prevented. The safety and reliability of the lock are improved, and application of the lock becomes wider increasingly.

The invention discloses a transmission device for cutting a cylinder with plasma, relates to the technical field of plasma cutting, and solves the problem of poor guiding performance in the process of clamping and cutting the cylinder in the prior art; it comprises a processing table, a plasma spray gun, a clamping plasma The clamping device of the spray gun and the XY-axis motion assembly that is arranged on the processing table to drive the plasma spray gun to move along the X-axis direction and the Y-axis direction are characterized in that: the clamping device includes an upper hoop and a lower hoop, It also includes a drive mechanism and a guide mechanism for driving the upper hoop to move along the radial direction of the cylinder. The drive mechanism and the guide mechanism are both arranged in the processing table, the lower hoop is fixedly installed on the processing table, and the upper hoop is installed on the processing table. The lower end of the hoop is provided with a T-shaped connecting block, and the upper hoop passes through the processing table and is connected with the driving mechanism through the T-shaped connecting block. By implementing the technical solution, the driving fixture tooling can move along a fixed direction to clamp cylinders with different diameters, and the guiding performance is good.

The invention relates to an intelligent lock system and an intelligent lock method. The intelligent lock system comprises a shell and an internal control circuit, wherein a handle is arranged on the shell; the control circuit comprises a control unit, a main lock driving module, an auxiliary lock driving module and an electronic lock; the electronic lock is connected with the control unit by a wireless communication module; the control unit is respectively connected with the main lock driving module and the auxiliary lock driving module; the control unit is connected with a switch module. The system integrates two unlocking modes, namely, electronic unlocking (the main lock driving module) and mechanical unlocking (the auxiliary lock driving module), the electronic lock is convenient and quick and high in safety in normal conditions, and the mechanical lock is in an idling condition at the moment; only when the electronic lock is low in power or has failure, the mechanical lock is started. The unlocking mode of the system can effectively prevent technical lock picking to the driving part of a lock cylinder in a mechanical manner. The system is simple in structure, smart in design, and steady and reliable in driving structure, so that the safety and reliability of lockset can be greatly improved, and the application is increasingly wide.

The invention relates to a panel TV bracket, which comprises a pedestal having a horizontal bottom surface, a rotary table arranged on the pedestal and a TV set hanger arranged on the rotary table, also comprises a rotary assembly arranged in the rotary table and driving the rotary table to rotate and a control assembly for controlling the rotary assembly to rotate, wherein the rotary assembly comprises a central shaft vertical to the pedestal, a driven assembly sleeved on the central shaft through a bearing, a motor fixedly installed on the pedestal and operating controlled by the control assembly, and a conical gear pair driven by the motor. The driven assembly is driven by the conical gear pair through a transmission assembly, the TV hanger is fixedly installed on the driven assembly. The panel TV bracket has simple and stable transmission structure, improves the operation performance for angle adjustment of the TV set.

The invention belongs to the technical field of agricultural equipment and provides a power system of a combine harvester. The power system is characterized by comprising the following mechanisms: a power input mechanism, a gear shift mechanism, a braking mechanism, a steering and clutching drive mechanism and a walking power take off mechanism, wherein axle fit mechanisms which are used for keeping running clearance distances and fixed positions of all the mechanisms are arranged in the power input mechanism, the gear shift mechanism, the steering and clutching drive mechanism and the walking power take off mechanism. The power system of the combine harvester has the advantages that through the axle fit mechanisms, the stability of a crawler transmission structure is guaranteed, failure and damage are not easy, the reduction of maintenance cost is facilitated, the running speed on smooth pavements and adaptability to complicated field parcels of the combine harvester are improved, the cross-region operational performance of the combine harvester is improved greatly, the wear life can be prolonged, the life is further prolonged, and the reliability is further improved.

The invention relates to a double-roller crusher. The double-roller crusher comprises rollers and a plurality of toothed plates. Each roller comprises a roller body. The toothed plates are fixed to the surfaces of the roller bodies. Each toothed plate comprises a positioning column, a plate seat and a tooth, wherein the positioning column is fixedly connected with the bottom of the plate seat and is in a circular truncated cone shape, and the diameter of the upper bottom face of the positioning column is larger than the diameter of the lower bottom face of the positioning column. A plurality of tooth installation grooves are formed in the surface of each roller body in the axial direction of the roller body, the bottom of each tooth installation groove is provided with a plurality of positioning holes used for positioning the corresponding tooth in the radial direction of the roller body, each positioning hole is in a circular truncated cone shape, the diameter of an upper opening of each positioning hole is larger than the diameter of a lower opening of the positioning hole, the upper openings of the positioning holes are formed in the bottoms of the tooth installation grooves, and the bottoms of the tooth installation grooves are further provided with a plurality of connection holes. The positioning columns are installed in the positioning holes. Fastener holes are matched with the connection holes. The double-roller crusher is reasonable in structural design, firm, reliable in performance and long in service life.

A mechanical arm driven in a compound manner comprises double slide arms and drive devices. The double slide arms include the outer slide arm and the inner slide arm embedded in the outer slide arm and connected with the outer slide arm in a sliding manner. The outer slide arm is connected with a slide rail base through slide rails in a sliding manner. The drive devices are installed on the slide rail base and include the first drive device and the second drive device. The first drive device comprises a servo motor, a speed reducer and a belt wheel I. The servo motor drives a conveyor belt I through the speed reducer and the belt wheel I so that an outer profile can be driven to slide up and down. The second drive device comprises a cylinder. A piston rod of the cylinder is connected with the outer profile and pushes the outer profile to slide. Two belt wheels II are arranged on the outer profile. A conveyor belt II is assembled between the belt wheels II. The inner side of the conveyor belt II is fixed to an inner profile, and the outer side of the conveyor belt II is fixed to the slide rail base. The outer profile moves up and down so as to drive the inner profile to move up and down at a double speed relative to the outer profile. By means of the mechanical arm, the stroke is increased, space is saved, the operation precision and efficiency are improved, the material mass range is widened, and safety is high.

The invention relates to an intelligent lock based on Internet of Things and having a power generating function. The intelligent lock comprises a body, a door handle and at least two control buttons,and further comprises a power generating mechanism and a protecting mechanism; the power generating mechanism comprises a first driving assembly, a supporting rod, a gear, a connection shaft, a transmission assembly and a power generating assembly; the transmission assembly comprises a rotating disk, at least two transmission gears and at least two non-return units; and the protecting mechanism comprises a second driving assembly, a cover plate and a transmission rod. In the intelligent lock based on the Internet of Things and having the power generating function, due to the power generating mechanism, when a battery of the intelligent lock is used up, manual power generating can be performed to supply electricity for the intelligent lock, the intelligent lock can work normally, and trouble brought to people because of power failure of the intelligent lock is reduced; and besides, due to the protecting mechanism, when people do not use the intelligent lock, the control buttons of the intelligent lock can be protected through the cover plate, and the safety of the control buttons is improved.

The invention relates to a settling crankshaft connecting rod mechanism for a single needle bed warp knitting machine. The connecting rod mechanism is composed of a connecting rod frame, a crankshaft, a plurality of connecting rods and a pin shaft; the connecting rod mechanism can be used for effectively shortening the stoke of the connecting rod mechanism of a needle bed to ensure small vibration and inertia of the needle bed and enable the machine to operate at a higher speed, so that the production efficiency is enhanced.

The portable separated washing machine consists of two parts including separable washing barrel assembly and driver assembly. The washing barrel assembly includes washing barrel and stirring wheel installed on the rotating shaft in the bottom; and the driver assembly includes motor, transmission mechanism connected to the motor, motor controller and casing for holding the said parts. The casingis one L-shaped one comprising one horizontal casing and one vertical electric element casing with communicated inner cavities. The output shaft of the motor is set downwards inside the electric element casing, and the output shaft of the transmission mechanism is connected to the shaft of the stirring wheel via a detachable transmission coupling mechanism. The present invention has lower working gravity center, high stability and safety and low cost, and is favorable to setting belt transmission unit with great transmission ratio and preventing leakage.

The invention discloses a double-wave-line ball deceleration bearing with high rotary precision. The bearing comprises an input shaft, wherein the input shaft comprises a first mounting part, an eccentric part and a second mounting part sequentially connected in the axial direction; a first shell is movably arranged on the periphery of the first mounting part in a sleeving manner; an annular avoiding groove is formed in the first shell; a driving disc is movably arranged on the periphery of the eccentric part in a sleeving manner and is positioned in the avoiding groove; a ball mechanism is arranged between the driving disc and the inner end face of the avoiding groove; a second shell is movably arranged on the periphery of the second mounting part in a sleeving manner; a hypocycloid groove is formed in the second shell; an epicycloid groove is formed in the driving disc; the wave number of the hypocycloid groove is greater than that of the epicycloid groove; and a plurality of first balls are distributed between the hypocycloid groove and the epicycloid groove. The invention aims to provide the double-wave-line ball deceleration bearing which can increase the reduction ratio and reduce the wear loss, is small in error and transmission ratio error, and has multiple output modes.

The invention relates to a needle-bed crankshaft and connecting rod mechanism of a single-needle-bed warp knitting machine. The needle-bed crankshaft and connecting rod mechanism is composed of a connecting rod frame, a crankshaft, a plurality of connecting rods and pin shafts. The movement distance of the needle-bed connecting rod mechanism can be effectively shortened, so that the needle-bed crankshaft and connecting rod mechanism is low in vibration and small in inertia, the machine can operate at higher speed, and production efficiency is improved.

The invention relates to a communication iron tower with a windproof function based on the Internet of Things. The communication iron tower comprises a tower footing, a tower body and two antennas, and further comprises a windproof mechanism and a weeding mechanism; the windproof mechanism comprises a driving assembly, two moving frames, two driving blocks, two first transmission rods and two second transmission rods; the weeding mechanism comprises a sprinkling assembly and a positioning assembly; the positioning assembly comprises a first driving unit, a first sleeve, a second gear, a fixingrod and an air cylinder; and the sprinkling assembly comprises a second driving unit, a base plate, a swinging rod, a nozzle and a second sleeve. In the communication iron tower with the windproof function based on the Internet of Things, through the windproof mechanism, the antennas can be stored by the communication iron tower when the wind speed is high, thus the antennas are protected, and the safety performance of the communication iron tower is improved; and through the weeding mechanism, weeds grown on the tower footing can be removed, thus damage of the weeds to the tower footing is reduced, and the stability of the communication iron tower is improved.

The invention provides a motorcycle engine box four-hole drilling and tapping device, relating to the field of tools for drilling and tapping four holes on a motorcycle engine box. A motor (2) arranged on a fixed box body (4) drives a drive gear (5); a duplicate gear (8) meshed with the drive gear (5) is meshed with a left front main shaft gear (24), a right front main shaft gear (25), a left rear main shaft gear (26) and a right rear main shaft gear (27); a transmission shaft (9) is penetrated in the duplicate gear (8) and an oil seal cover (31); and a drilling chuck (33) arranged at the lower end of a right front main shaft (18) is internally provided with an auger bit (36), and the oil seal cover (31) is arranged at the lower part of a box body (12) which is arranged on the fixed box body (4). The motorcycle engine box four-hole drilling and tapping device (1) has the advantages of capability of drilling four holes on the box body, high efficiency and stable transmission structure.

The invention discloses an oven, including a box of the oven, a motor, and a rotor with a rotating shaft. The rotating shaft rotates, so the rotor rotates around an axis of the rotating shaft. The boxis at least provided with a first cavity and a second cavity. The first cavity and the second cavity are separated by a separating plate. The rotor is held in the first cavity. The separating plate is fixedly provided with a support for mounting the rotor. The rotor is arranged in the support along a direction intersecting with the axis of the rotating shaft. The motor is arranged in the second cavity. The motor has a motor shaft. The motor shaft is corresponding to the rotating shaft, and the separating plate is provided with a through hole used for connecting the motor shaft and the rotating shaft on the corresponding position. The oven also comprises a coupling connecting the motor shaft and the rotating shaft, and a clutch device controlling motions of the coupling. The clutch deviceis arranged in the second cavity. The clutch device moves the coupling, to provide convenience for installation of the rotating shaft, and the clutch device and the coupling transmit in a cooperated manner. The clutch device is added in the oven, providing convenience for mounting and dismounting of the rotating shaft.

The invention discloses an intelligent logistics sorting device based on the Internet of Things and a using method thereof, and belongs to the technical field of logistics sorting. The intelligent logistics sorting device based on the Internet of Things comprises a base and a supporting column, wherein the supporting column is connected to the bottom of the base, the outer wall of the base is connected with a shell, the outer wall of the shell is connected with a control panel, two transmission rollers are rotationally connected between the inner walls of the two sides of the base, and a conveying belt is connected between the two transmission rollers; logistics packages are placed on the outer wall of the conveying belt, electric rotating rods are connected to the outer walls of two sides of the base, scrapers are connected to the outer walls of the electric rotating rods, receiving grooves are further connected to the outer walls of the two sides of the base, a supporting base is connected to the outer wall of the shell, a motor is connected to the outer wall of the supporting base, and the output end of the motor is connected with a first rotating shaft which is rotatably connected to the outer wall of the shell. According to the invention, by centering the logistics packages, the logistics packages are straightened and are in the scanning range of the bar code scanner, so that the scanning accuracy and the sorting efficiency of the logistics packages are improved, and the practicability is high.

The invention discloses a method for cleaning the well wall of a geothermal well, which comprises the following steps: when a cleaning device first goes out of a well, firstly releasing a section of asecond fixing rope by a mechanical transmission structure; in the process of releasing a second fixing rope body by a roller, linearly pulling a plurality of supporting rollers towards a symmetricalcenter position at the same time, until the outer boundaries of the supporting rollers are smaller than the size of a well entry opening, and then the well entry operation is carried out. After the whole cleaning device enters the well, the reverse operation is carried out, the roller rotates in the reverse direction, drives the mechanical transmission structure to simultaneously push the supporting rollers away from the symmetrical center position to linearly pull and move until all the released rope bodies of the second fixing rope are retracted. Synchronously, a rotating motor on the groundstarts to work, the method solves the problem of low stability system of a geothermal well wall cleaning device, leads the transmission structure to be more stable, improves the stability and safetyof the cleaning process, leads the cleaning efficiency to be high, greatly improves the working efficiency and brings great convenience to users.

The invention discloses a household classifiable trash can which comprises a trash can body and an upper cover connected with the trash can body, wherein a hollow braking cavity a and a hollow transmission cavity b are formed in the bottom surface of the trash can body and in a lateral surface of one side connected with the bottom surface of the trash can body respectively; a partition base plate is arranged at the middle of the trash can body; the upper part of the partition base plate is movably connected with a partition plate through a rotating pin; a first connecting rod is arranged on one side of the bottom of the partition plate and is matched with the crank arm connecting rod of the partition plate; the bottom of the first connecting rod is connected with the middle of a first foot bar through a rotating pin; the first foot bar is arranged in the braking cavity a. According to the household classifiable trash can, the structure is simple, the transmission structure is stable, stability and reliability are realized during the using process, dual purposes are realized, later arrangement and classification are convenient, and secondary utilization of common garbage is facilitated.

The invention relates to a crankshaft and connecting rod mechanism of a guide bar of a warp knitting machine with a single needle bed. The crankshaft and connecting rod mechanism comprises a connecting rod mechanism. The connecting rod mechanism comprises a connecting rod frame, a crankshaft, a plurality of connecting rods and hinge pins. The crankshaft and connecting rod mechanism has the advantages that the stroke of the connecting rod mechanism of the needle bed can be effectively shortened, the connecting rod mechanism is low in vibration and inertia, the machine can run at high speeds, and accordingly the production efficiency can be improved.

The invention relates to a pipe barrel inner wall automatic polishing device. The pipe barrel inner wall automatic polishing device comprises a machine body, at least three supporting wheel sets, a rotary disk and a grinding structure, wherein the machine body is arranged in a pipe barrel; the at least three supporting wheel sets are arranged on the pipe barrel at intervals in the circumferentialdirection; the at least one supporting wheel set is provided with a driving wheel used for driving the machine body to move in the axial direction of the pipe barrel; the rotary disk is rotatably assembled to the machine body; and the grinding structure is arranged on the rotary disk and used for polishing the inner wall of the pipe barrel in the rotating process. The grinding structure arranged on the machine body rotates in the circumferential direction of the pipe barrel when the rotary disk rotates so as to conduct grinding on the inner wall of the pipe barrel. The machine body is providedwith the supporting wheel sets with the driving wheels. The supporting wheel sets can drive the machine body to move in the axial direction of the pipe barrel, so that the grinding structure moves inthe axial direction of the pipe barrel when conducting circumferential grinding on the inner wall of the pipe barrel to implement automatic grinding on the pipe barrel. The labor intensity is reduced, the grinding efficiency is improved, and the grinding quality is ensured.

The invention provides an incision traction device for orthopedic surgery. The incision traction device comprises a fixing assembly, a telescopic column and a traction device body; the traction device comprises a box body, a driving assembly, two traction arms and traction blocks at the lower ends of the traction arms, and length adjusting assemblies are arranged on the traction arms; the driving assembly comprises a horizontal rotating disc, the traction arms are fixedly connected with the horizontal rotating disc, the other ends of the traction arms extend out of the front side wall of the box body, a vertical rotating shaft penetrates through a driven bevel gear, a horizontal rotating shaft is arranged on the rear side wall of the box body, a driving bevel gear and gears penetrate through the horizontal rotating shaft, the gears are meshed with each other, A horizontal rotating shaft extends out of the rear side wall of the box body and is fixedly connected with a hand crank; and the traction blocks are rotationally connected with the traction arms through vertical hinge shafts, and rotary positioning assemblies are arranged between the traction blocks and the hinge shafts. The device is connected with an operating bed, the structure is stable, time and labor are saved, the adjusting speed is gentle, the situation that a doctor pulls off force to make an incision slide is avoid, the traction blocks are more attached to the inner wall of the incision, the medical burden is relieved, and the operation efficiency is greatly improved.

The invention discloses a rear drive assembly of a mechanical intelligent self-adaptive automatic gearbox, which comprises the gearbox and a power device which are arranged on a vehicle frame, wherein the power device outputs power through a transmission shaft of the gearbox and is backwards in transmission connection with a differential mechanism through a universal joint; and the differential mechanism is in transmission connection with rear wheels of a vehicle. The rear drive assembly has all advantages of the existing cam self-adaptive automatic gearbox, adopts a pre-arranged or centrally-arranged rear drive structure and is combined with a transmission structure of a spiral cam pair, and the radial size of the rear drive assembly is further reduced, so the volume is decreased, the adaptability is high and the service life is greatly prolonged; and the spiral structure transmits steadily, is stressed evenly and has incomparable stability and smoothness, so the work efficiency is further improved, better energy-saving and consumption-reducing effects are achieved, vehicle emissions are greatly controlled, the rear drive assembly is more suitable for being used on pure electric vehicles and tricycles, and the dynamic performance, the economical performance, the driving safety performance and the comfortable performance of the vehicles are greatly improved.

The invention discloses a drying device having the adjustable horizontal position and used for clothes processing. The drying device comprises a main casing, an air blower and a driving wheel, whereinan air inlet is formed in the lower side of the rear end of the main casing, a thermal insulation lining is arranged on the upper side of the inside of the air inlet, heating wires are arranged in the thermal insulation lining, and an external base is arranged above the thermal insulation lining; a guide pipe is connected above the air blower located above the external base, a switching joint isfixed at the upper end of the guide pipe, a belt is connected in front of the driving wheel, a drive wheel is connected at the front end of the belt, and a rotating shaft is arranged on the lower sideof the inside of the main casing. Compared with existing ordinary drying devices, the drying device having the adjustable horizontal position and used for clothes processing has greatly improved practical performance while structures are increased, original fixed drying modes are abandoned, drying is more uniform in a horizontal adjusting mode, the working efficiency is improved, and the use demands of people are effectively met.

The invention discloses a multifunctional chain-free integration power output assembly for a dense frame. The multifunctional chain-free integration power output assembly comprises an output shaft, and further comprises a multifunctional complex conversion transmission device. The multifunctional complex conversion transmission device comprises a polygonal input shaft, a conversion reset gear mechanism arranged between the polygonal input shaft and the output shaft and a conversion control mechanism arranged between the conversion reset gear mechanism and the polygonal input shaft. The multifunctional chain-free integration power output assembly for the dense frame is simple, scientific and reasonable in structural composition, integrates speed change and brake locking and can achieve a variety of transmission functions, and the power input and output speed change transmission structure and method carried out on the same axis by the multifunctional chain-free integration power output assembly have high transmission efficiency.

The invention discloses a grain harvesting machine with good power performance. The grain harvesting machine comprises a self-propelled machine body, a harvester, a spiral conveying device and a drum-type threshing device, wherein the harvester, the spiral conveying device and the drum-type threshing device are arranged on the self-propelled machine body; the self-propelled machine body comprises a frame, traveling wheels, an engine and a transmission component; the transmission component is in transmission connection to the power output shaft of the engine, the harvester, the spiral conveying device, the threshing device and the traveling wheels and comprises a side-hanging-type transmission box which is transversely arranged on the lateral side of the frame and is used for transmitting power to the traveling wheels; the flywheel of the engine comprises a flywheel body, at least two variable-inertia sliders and an internal balance rotary disc; the variable-inertia sliders are uniformly arranged around the rotary shaft of the flywheel body and are radially and slidably connected to the flywheel body; the internal balance rotary disc serving as a synchronizing device is coaxially and rotatably connected with the flywheel body and is in slide fit with the variable-inertia sliders through a planar slideway; the planar slideway deflects along the circumferential direction of the rotary disc, so that a certain included angle is formed between the planar slideway and the sliding direction of the corresponding slider. The grain harvesting machine with good power performance has the advantages that the engine, the harvester, the threshing device and the spiral conveying device are compactly distributed, so that the operating flexibility of the whole harvesting machine can be improved, the length of a transmission chain is reduced, the stability of a transmission structure is ensured, the grain harvesting machine is less prone to failure and damage, and maintenance cost is reduced favorably.

The invention discloses a button-switched sprinkler and a switching method thereof. The switching method comprises the following steps of: 1firstly, pressing a button in slip connection with the sprinkler to relatively slip; 2 secondly, rotating a pawl by making the button act on a linkage seat of the pawl; 3 thirdly, rotating the pawl and rotating a ratchet wheel through the control end of the pawl, and simultaneously deforming an elastic claw of the pawl to store energy; 4 fourthly, rotating the ratchet wheel and drivingto drive a water distributing disc to rotate, accomplishing the switching of water outlet functions by using the water distributing disc when rotating the water distributing disc to the place, and meanwhile, making a stopping claw of the pawl abut against ratchets of theratchet wheel to prevent the reversal of the ratchet wheel; and 5 fifthly releasing the pressing to reset the button, releasing the elastic energy of the elastic claw and driving the pawl to reset. The invention has the advantages that the button-switched sprinkler realizes one-way rotation by applying the ratchet wheel to be convenient for automatic positioning; different from the traditional front cover rotating ring switching mode, users only need to slightly pressure press the bottom button to realize the switching of the water outlet functions, so the switching method hasis convenient switching; and the button-switched sprinkler has stable structure, small switching force and good switching hand feeling.

The invention belongs to the technical field of agricultural equipment, and provides a walking power output mechanism of a combine-harvester. The walking power output mechanism comprises a power input end assembly, an output shaft, a driving gear assembly and a crawler wheel assembly, a sleeve part is arranged on the exterior of the output shaft between the crawler wheel assembly and the driving gear assembly, the output shaft is arranged in the sleeve part in a penetrating mode, and an axial coordination assembly used for adjusting the running clearance distance is arranged between the output shaft and the sleeve part. The walking power output mechanism has the advantages that by means of the axial coordination assembly, it is guaranteed that the caterpillar drive structure is stable and is not likely to fail or damage, the maintenance cost can be reduced, the running speed of the combine-harvester on a smooth-riding surface is increased, and adaptability to complex field blocks is improved, and the cross-regional operation property of the combine-harvester is greatly improved; meanwhile, a longitudinal adjusting bearing, a first rolling bearing and a second rolling bearing can prolong the abrasion life by adjusting the clearance matched with the output shaft, the service life is further prolonged, and the reliability is further improved.

The invention relates to a secure communication iron tower with adjustable signal coverage. The iron tower includes a platform, a tower body and at least two antennas. The iron tower also includes a lifting mechanism, an anti-falling mechanism and at least two adjustment mechanisms. The lifting mechanism includes a first supporting bar, a first lifting block, a second lifting block, a driving assembly, a pedestal, two lifting bars and two transmission assemblies. The anti-falling mechanism includes a guide rail, a shell, a trigger assembly, a groove, a third driving rod, and two sleeves. In the secure communication iron tower with adjustable signal coverage, the coverage of communication iron tower signals can be adjusted through the lifting mechanism and the adjustment mechanism. When thecommunication iron tower fails, a surrounding communication tower can adjust the signal coverage to ensure that the signals in a fault communication iron tower area is normal, and so the impact of communication iron tower faults on people is reduced. Through the anti-falling mechanism, a working person can be pulled back when the working person falls accidentally, and so the safety of aloft workof working people is improved.