73results about How to "Guaranteed center of gravity" patented technology

The invention discloses a high ground clearance and variable wheel distance and axle distance type plant protection machine. The high ground clearance and variable wheel distance and axle distance type plant protection machine comprises an upper vehicle frame and a lower vehicle frame, wherein the upper vehicle frame and the lower vehicle frame are connected by a miniature rotary platform; a power system, a main variable-speed system, a hydraulic system, a driving operation system, a pesticide spraying and pollinating system, a fertilizer applying system, and the like are symmetrically arranged around a central rotary platform according to a gravity center balance ratio principle; the lower vehicle frame is mainly provided with four foldable and telescopic support legs, and the walking, steering, change of wheel distance and axle distance, adjusting of ground clearance and gravity center height, and other functions of the machine are realized by a corresponding wheel rim transmission system. The invention also discloses the wheel rim transmission system; by utilizing the mixed transmission type of universal transmission, chain wheel transmission and bevel gear transmission, the wheel distance and axle distance can be adjusted. The high ground clearance and variable wheel distance and axle distance type plant protection machine has the advantages that the structure is compact, the function is complete, the working is stable, the application range is wide, the cruising ability is strong, the operation is easy, and the operation efficiency is high. The wheel rim transmission system has the advantages that the stability and operability are good, the driving force is large, the effect of one machine with multiple functions is realized, and the requirement of whole machine is met.

The invention provides a barrier-free self-propelled cart assembly which is provided with horizontal gravity center shifting devices arranged on the two sides of a chassis. Drive units of the horizontal gravity center shifting devices are arranged on the chassis. At least one longitudinal horizontal-moving guide device is arranged on the chassis in the advancing direction of the moving device. Sliding bases matched with the horizontal-moving guide devices are arranged on the power portion of a connecting rack. A sector gear is fixed to one sliding base. A drive motor is fixed to the lower portion of the connecting rack. A motor drive shaft is connected with a gravity center moving transmission gear engaged with the sector gear, and further connected with a horizontal-moving transfer gear box in a transmission mode. The power output shaft of the transfer gear box is axially arranged on the connecting rack in a pivoted mode. Drive gears engaged with racks fixed to a chassis correspondingly are arranged on the power output shaft. The barrier-free self-propelled cart assembly is applied to large-slope road conditions, the gravity center and horizontal balance can be guaranteed, and adverse influence on passengers or cargoes is avoided.

The invention discloses a novel scissors type high-altitude operation car. The novel scissors type high-altitude operation car comprises a bottom car body, a middle scissors type vertical folding frame and a top horizontal three-section retractable arm sleeve connection structure which are successively connected; the scissors type vertical folding frame can be unfolded or folded to adjust the height; the horizontal three-section retractable arm sleeve connection structure stretches out of the upper part of the rear end of the car body or draws back from the upper part of the rear end of the car body to adjust the stretching length; a balance weight is mounted in the front of the car body; the car body is steered and driven by the aid of front wheels; and after the front wheels turn left or right, the car body can rotate around a left rear wheel or a right rear wheel. The characteristics of a cantilever crane type high-altitude operation car and a scissors type high-altitude operation car in an existing high-altitude operation car markets are combined, and the novel scissors type high-altitude operation car not only has the property of great stretching length of a working platform of the cantilever crane type high-altitude operation car, but also has the advantage of low price of the scissors type high-altitude operation car, and therefore is suitable for being popularized and used.

The invention discloses a heating furnace brick holding frame structure which comprises a brick holding plate, a brick pulling rod and a heating furnace wall plate. The brick pulling rod is in a strip-shaped structure. The cross-section of the strip-shaped structure is F-shaped. Two shorter sides parallel to each other of the F-shape cross section are connected with the heating furnace wall plate. The brick holding plate comprises a plate body and a support. A bending portion towards the reverse surface of the plate body is arranged on one edge of the plate body. The support is connected with the reverse surface of the plate body. The support is L-shaped. One side of the L-shaped support is connected with the plate body. The bending portion of the plate body is fastened on the longer side of the L-shaped support. The other side of the L-shaped support directs toward the bending portion and abuts against the heating furnace wall plate. Due to the structure of the heating furnace brick holding frame, the heating furnace brick holding frame structure can be manufactured in a casting mode and applied to various heating furnaces. In this way, novel alloy materials can be selected to use, and heat-resistant property of the heating furnace brick holding frame structure is improved.

The invention relates to the technical field of LED display screens, and discloses a rotary LED display screen, which includes an LED rotary column display screen, a rectangular circuit board, a rotating shaft and a stepping motor, and the LED rotary column display screen is arranged in the center of the rectangular circuit board position, the stepper motor is connected to the lower part of the rectangular circuit board through the rotating shaft, an LED driver module is packaged on one side of the rectangular circuit board, and a second microcontroller and a second wireless transceiver are packaged on the other side of the rectangular circuit board. One side of the motor is provided with a first microcontroller and a first wireless transceiver connected to each other, the first wireless transceiver is wirelessly connected to the second wireless transceiver, the second wireless transceiver is connected to the second microcontroller, and the second wireless transceiver is connected to the second microcontroller. The second microcontroller is connected with the LED driving module, and the LED driving module is connected with the LED rotating column display. The invention adopts a rectangular circuit board, and when the circuit board is laid out, it is convenient to ensure that the rotating shaft is directly facing the center of gravity of the rectangular circuit board, so as to avoid rotation during rotation and make the rotation more stable.

The invention relates to a man-made material particle which is applicable to manufacturing a badminton ball head or bottle plug and made of man-made materials. The man-made material particle comprises a particle body with polyhedral appearance and at least one air chamber arranged in the particle body.

A gesture adjustment and horizontal driving mechanism for a profile buoy comprises a buoy shell, a dual-oil bag type gesture adjustment device and a dual-propeller horizontal push device. The invention provides the gesture adjustment and horizontal driving mechanism for the profile buoy. In the novel dual-oil bag type gesture adjustment mechanism designed by the invention, the buoyancy distribution of the buoy can be changed by the dual-oil bag structure after the buoy reaches a preset working depth, 90-degree gesture change of the buoy from vertical direction to horizontal direction is achieved, and the problem that an existing profile buoy only have pure vertical gesture is solved, and the buoy can be maintained in horizontal gesture with minimum water resistance. Meanwhile, the invention designs a dual-propeller horizontal push mechanism for the profile buoy, and the problem that the existing buoy cannot be horizontally driven is solved. By the gesture adjustment and horizontal driving mechanism, the controllability and the independence of the buoy are improved, the buoy can move according to an expected route, the three-dimensional continuous observation capability of the buoyis improved, and the buoy is helped to be recycled.

The invention provides a centrifugal atomizer. The centrifugal atomizer comprises a water collecting tray, an atomizing tray, a motor, a water supply device, a water receiving tray and an air guide sleeve, wherein the motor is used for driving the atomizing tray to rotate; the water supply device is used for feeding water to the atomizing tray; the air guide sleeve is used for guiding the air to be blown out upwards; the atomizing tray is positioned inside the water collecting tray; an atomizing part having collision with water which is ejected at a high speed from the periphery of the atomizing tray is arranged on the circumference of the water collecting tray; the water receiving tray is positioned below the water collecting tray; and the air guide sleeve is arranged below the water receiving tray. The atomizer provided by the invention can prevent the water mist formed by atomization from being condensed into water droplets on the outer wall of the water receiving tray so that no water droplets drop on the ground and water accumulation is prevented.

The invention provides a universal platform for a stage. The universal platform comprises a vehicle platform base, a locking universal wheel assembly, a rotating assembly, a rotating platform, vehicleplatform panels and telescopic supports, wherein the center of the bottom of the vehicle platform base is provided with the rotating assembly; the top end of the rotating assembly is provided with the rotating platform; the left end and the right end of the rotating platform are provided with the telescopic supports; the top ends of the telescopic supports are provided with the vehicle platform panels; and the front end of the rotating assembly is provided with a control end. According to the universal platform, the control end can be used for controlling the locking universal wheel assembly,so that a vehicle platform can run in any direction and on any path, the control end enables the use of the vehicle platform to be more flexible and convenient, on the premise that an universal vehicle platform can freely rotate in all directions, the vehicle platform can be locked in real time during the moving process, the stability and safety of the vehicle platform are improved by matching the use of stage workers, a vehicle platform assembly concentrates materials on the vehicle platform base and the rotating platform, so that the center of gravity is stable, and the offset phenomenon isavoided.

The invention relates to a hybrid power unmanned aerial vehicle with two kinds of rotors and a control method thereof. The unmanned aerial vehicle comprises a vehicle body, the edge of the vehicle body is provided with at least one pair of control rotors, the two control rotors in each pair are symmetrically arranged, the control rotors are driven by a motor, the center of the vehicle body is provided with a plurality of lifting rotors, and the lifting rotors are arranged on the same rotating shaft and driven by the same fuel motor. The invention provides the hybrid power unmanned aerial vehicle with two kinds of rotors. According to the unmanned aerial vehicle, the multiple lifting rotors are arranged in the center of the vehicle body and arranged on the same rotating shaft, all the lifting rotors can synchronously rotate at the same speed when the rotating shaft is driven by the fuel motor to rotate, and therefore the flight stability of the unmanned aerial vehicle can be reliably guaranteed.

The invention discloses an automatic tool changing system and tool changing method. The automatic tool changing system comprises a tool changing mechanism and a tool clamping mechanism. The tool changing mechanism comprises a rotor disc arranged on a motor rotating shaft, and an electromagnetic assembly is arranged on the rotor disc. The tool clamping mechanism comprises a tool disc used for clamping a tool, and an armature disc cooperating with the electromagnetic assembly is arranged on the end face of the side, close to the rotor disc, of the tool disc. Through powering on and off of the electromagnetic assembly, the tool clamping mechanism can be connected to the tool changing mechanism or separated from the tool changing mechanism. The automation degree of the tool changing manner ishigh, the tool can be rapidly replaced, time can be effectively saved, and machining efficiency can be improved; and through bidirectional conic hole locating, the repeated locating precision after tool changing can be effectively guaranteed, and machining quality can be guaranteed.

The invention discloses an automatic clamp of a cargo box and an unmanned aerial vehicle. A rack is provided with at least two clamping plates which are mutually matched for clamping the cargo box; the automatic clamp of the cargo box also comprises a driving device; and the driving device drives at least one clamping plate to clamp the cargo box. Automatic clamping of the cargo box can be realized, the delivery efficiency can be effectively improved, and the manpower consumption can be reduced.

The invention relates to a drag type cropping robot trolley for large cloth roll. The drag type cropping robot trolley comprises an AGV and an automatic cropping mechanism, wherein the automatic cropping mechanism is arranged on the AGV; the automatic cropping mechanism comprises a rack, drag mechanisms, a breadth regulating mechanism, a jacking mechanism and a positioning mechanism, wherein the drag mechanisms are arranged on the breadth regulating mechanism, and are used for dragging cloth roll onto the automatic cropping mechanism from a loom; the breadth regulating mechanism is used for enabling a distance between the two groups of the drag mechanisms to be corresponding to the length of the cloth roll; the jacking mechanism is arranged on the middle part of the rack and is used for jacking the cloth roll to unload; and the positioning mechanism is used for fixing the cropping robot trolley onto a loom rack. The drag type cropping robot trolley disclosed by the invention can realize automatic cropping, automatic carrying and automatic unloading of the large cloth roll; and the rolling diameter of the large cloth roll is much greater than that of small cloth roll, and weight ofthe large cloth roll is much greater than that of the small cloth roll, so that manual carrying has great potential safety hazards. The drag type cropping robot trolley can ensure safety and stabilityin a cropping process and a cloth unloading process.

The invention relates to a self-adapting type hydraulic power device for a movable bridge, which belongs to the technical field of hydraulic drive. The self-adapting type hydraulic power device is characterized by being installed in a box beam of the movable bridge and comprising a hydraulic mechanism, a rotating bracket and a weight balance block, wherein the rotating bracket is fixed to the box beam of a movable bridge beam; the hydraulic power mechanism is provided with a rotating shaft; the rotating shaft is connected with the rotating bracket by a bearing; and the bottom of the hydraulic power mechanism is provided with the weight balance block. The invention has the advantages of compact structure, convenience of assembly, high integrated degree, flexible start and shutdown of an oil pump, no overflow of hydraulic oil, high working efficiency, reliable performance, safe operation, and the like.

The invention provides an auxiliary fuel system which comprises a fuel feed subsystem, a ventilating subsystem and a delivering subsystem. The fuel feed subsystem is used for feeding fuel in an auxiliary oil tank. The ventilating subsystem is used for guaranteeing pressure in the auxiliary oil tank. The delivering subsystem is used for simultaneously delivering fuel in the auxiliary oil tank to a left main oil tank and a right main oil tank of a plane fuel system. The auxiliary fuel system can simultaneously deliver fuel to the two main oil tanks, automatically control fuel delivering of the auxiliary tank during flight of a plane, and effectively maintains gravity center of the plane fuel system.

The invention discloses an anti-freeze retaining wall for a water conservancy project. The anti-freeze retaining wall for the water conservancy project comprises a retaining wall body. The retaining wall body comprises a left blocking piece and a right blocking piece, and an anti-freeze gap is arranged between the left blocking piece and the right blocking piece; a left oblique wrapping layer is arranged on the outer side of the left blocking piece, and a right oblique wrapping layer is arranged on the outer side of the right blocking piece; an anti-freeze particle filling layer is arranged in the anti-freeze gap; plant growing holes are evenly formed in the left blocking piece and the right blocking piece. The anti-freeze retaining wall for the water conservancy project is simple in structure and high in use stability; the anti-freeze performance of the retaining wall is improved to a certain extent; in addition, due to the fact that the oblique wrapping layers are arranged on the outer sides respectively, the gravity of the retaining wall is guaranteed, the pressure towards soil of a wall body is increased, and the anti-toppling capacity of the wall is improved; due to the fact that the plant growing holes are formed, plants can be cultivated easily, and growth of root systems of the plants is facilitated; the applicability is high, and the practicability is high.

The invention discloses a vehicle frame traveling mechanism device, and belongs to the technical field of vehicle frames. The vehicle frame traveling mechanism device comprises a track type low rack mechanism, a wheel type low rack mechanism and a wheel type high rack mechanism, wherein a main framework adopts an isosceles trapezoid four-bar linkage, and the frame of the vehicle frame traveling mechanism consists of rockers, pull rods and bridges; the lower ends of the rockers are respectively and fixedly connected with the upper ends of pendulum rods; tracks or wheels are mounted at the lower ends of the pendulum rods; two ends of hydraulic cylinders are hinged to the rockers and the bridges; the upper ends of the vehicle frame seats are hinged to the middle parts of the pull rods; lower ends of the vehicle frame seats are hinged to the middle parts of the bridges; the middle parts of the vehicle frame seats are fixedly connected with the middle parts of vehicle frames. The vehicle frame traveling mechanism device, disclosed by the invention, is good in stability; when a vehicle with the vehicle frame traveling mechanism device travels on a steep slope, the center of gravity of the vehicle can also be guaranteed to be in the middle part of the vehicle, and the vehicle is free from the restriction of the maximum gradient and the maximum driving lateral slope; another advantage is that the passing ability is good, and the lengths of the pendulum rods can be enlarged according to the need of a user, so that the minimum ground clearance is increased, and the vehicle capable of wading and spanning farm crops is manufactured.

The invention belongs to the technical field of wind tunnel tests and relates to a reusable launch wind tunnel test weapon model. The model comprises a bomb head (1), a bomb body (2) and a bomb tail (3). The bomb head (1) and the bomb tail (3) are detachably connected to two ends of the bomb body (2) respectively. A front fixed balancing weight (4) is arranged in the bomb head (1), a rear fixed balancing weight (5) is arranged in the bomb tail (3), the bomb body (2) is a hollow cylinder structure and is internally provided with a lead screw (10), and the lead screw (10) is sleeved with a movable balancing weight capable of moving along an axis of the lead screw. A structural mode with the combination of the fixed balancing weight and the movable balancing weight is adopted, so that the quality characteristic of a model is ensured in design, after machining is completed, no additional balancing weight needs to be added, only the fine adjustment of a movable adjusting block is needed toguarantee the position of a gravity center, in practical application, a test can be completed only by machining 2 to 3 launch weapon models, compared with the prior art, the machining amount and quality characteristic adjusting periods are shortened by 90% or above, and the machining difficulty is reduced.

The invention discloses an environment-friendly concrete conveying machine for a construction site. The environment-friendly concrete conveying machine comprises a main beam supporting frame; a support supporting frame is arranged at the top of the main beam supporting frame; the main beam supporting frame is provided with a slewing support through the support supporting frame; a main beam and a concrete conveying pipe penetrate through the interior of the main beam supporting frame; a feeding bent pipe is arranged at the bottom of the concrete conveying pipe, and a rotating bent pipe is arranged at the top of the concrete conveying pipe; one side of the rotating bent pipe is provided with a movable bent pipe through the concrete conveying pipe; the bottom of the movable bent pipe is provided with a discharging bent pipe through the concrete conveying pipe; the bottom of the discharging bent pipe is provided with a discharging hole cover; a connecting base is arranged at the top of thedischarging hole cover, and a noise reduction cover is arranged at the bottom of the connecting base; and the main beam is provided with a rotating balance frame through a pulley and a main beam diagonal brace, and a counterweight box is arranged on one side of the rotating balance frame. According to the environment-friendly concrete conveying machine for the construction site, through the powerful discharging hole cover, the problems that concrete is prone to splashing, and noise is large are solved.

The invention provides a mountain climbing machine. The mountain climbing machine comprises inclined tracks arranged in a supporting device; pedal plates capable of moving back and forth in the axialdirection of the inclined tracks are arranged on the inclined tracks; and at least one first traction rope is connected with the pedal plates, a first guide wheel and a braking device. A user pulls the first traction rope by pedaling the pedal plates back and forth to drive the pedal plates to rise or fall, wherein the stride of the pedal plates can be determined by the user, and the machine is suitable for stride of people at different ages; and in addition, the braking device can increase the resistance and improve the movement benefit of the mountain climbing machine.

The invention discloses an English teaching board convenient for operation and demonstration. The English teaching board comprises a teaching board main body, a driving wheel, a connecting block and afixing rod, wherein the teaching board main body at least comprises a main board body and two groups of auxiliary board bodies, the main board body is of a square board structure, an upper cover is fixedly mounted at the top end of the main board body, an accommodating slot is formed in the inner side of the main board body, is of a square structure and penetrates through the main board body, andtwo groups of the auxiliary board bodies are connected to the inner side of the main board body in a sliding manner; the upper cover is of an internal hollow rectangular solid structure, a rotating assembly is arranged on the inner side of the upper cover and at least comprises the driving wheel, a transmission belt and a driven wheel, one end of the transmission belt sleeves the driving wheel, and the other end of the transmission belt sleeves the driven wheel; and the fixing rod is arranged at the front end of the main board body. The English teaching board is simple in structure and easy to use, has the characteristics of high practicability, rapidness and convenience in use and the like and can be widely used.

The invention discloses a catkin removing device for environmental protection, and relates to the technical field of environmental protection equipment. The device comprises a shell, an elastic grooveis formed in the bottom of the shell; a motor is fixedly connected to the top of the inner wall of the elastic groove; the output end of the motor is in transmission connection with a threaded rod, the outer side of the threaded rod is sleeved with a lifting block, one side of the lifting block is fixedly connected with a transmission rod, the transmission rod is in sliding connection with the inner wall of an elastic groove, the bottom of the transmission rod is fixedly connected with a rubber block through a connecting rod, and an extrusion device is installed on the inner wall of the elastic groove. The catkin removing device can reduce the cost of removing catkin, the cleaning efficiency is improved, catkin in a large space can be quickly and effectively cleaned, meanwhile, the cleaning range is large, catkin in the air in a high area can be cleaned, a cleaning route does not need to be manually controlled, the labor cost is low, pedestrians can be prevented from being injured inthe cleaning process, and the safety is high.

The invention discloses a working method of a dredging robot. The dredging robot comprises a dredging equipment shell, a control part, a monitoring module, a communication module, a power system and asewage discharging system. The power system comprises a machine body carrying plate, a hydraulic station, a hydraulic valve, an oil pipe, a crawler belt movement system, a baffle and an oil cylinder.A power motor, an oil tank and an oil pump are arranged in the hydraulic station. The power motor provides power for the oil pump, and the oil pump sucks out oil in the oil tank and supplies the oilinto the oil pipe. The working method comprises a real-time monitoring method, an advancing dredging method, an accumulated silt dredging method and a cleaning method.

The invention discloses a movable shears-fork type lift which comprises a chassis, front wheels and rear wheels. The upper portion of the chassis is provided with two shears-fork arms. A support is arranged between the two shears-fork arms. The bottom of the chassis is connected with a front shaft through vertical supporting rods. The movable shears-fork type lift is characterized in that the number of the supporting rods is two, the portions, on the outer sides of the supporting rods, of the front shaft are provided with rotating shafts, the front shaft is connected with the rotating shafts through universal joints, the outer ends of the rotating shafts are connected with the front wheels, the front wheels are connected with a front wheel steering mechanism which comprises a trapezoid arm, a transverse pull rod and a shifting fork, the front end of the shifting fork is connected with the inner end of the transverse pull rod, the outer end of the transverse pull rod is hinged to the front end of the trapezoid arm, the rear end of the trapezoid arm is connected with the front wheels, the rear end of the shifting fork is connected with the steering transverse pull rod through a pin shaft, the middle of the shifting fork is in bearing connection with the front shaft, the shifting fork is shifted to rotate so as to drive the steering transverse pull rod to rotate, and the transverse pull rod drives the wheels to rotate. According to the movable shears-fork type lift, the rotating angles of the left front wheel and the right front wheel meet the Ackman theorem, tire abrasion is small, the assembling and disassembling efficiency is high, and safety and reliability are high.

The invention relates to the technical field of furniture appliances, and discloses a corner protection device for large furniture support parts utilizing the principle of center of gravity, including a base, a torsion spring connected to the outside of the second rotating column, and a cable disc connected to the outside of the torsion spring, The inner wall of the detection device is provided with a first metal sheet, the detection device is connected with a tension spring, the first metal sheet is correspondingly provided with a second metal sheet, and the inner end of the ring is connected with a displacement monitor. Under the action of gravity, the disk shifts, and the disk drives the connecting rod to pull the rope to move, and detects the distance the rope is pulled out; the rope drives the displacement monitor to slide on the ring, and the second metal sheet on the ring In contact with the first metal sheet, the control device controls different driving devices to drive the adjustment rod to rotate. This structure solves the problem that the corners of the existing furniture corner protection devices are relatively worn, the furniture support legs are easy to tilt and break, and cannot be automatically adjusted horizontally. question.

The invention relates to the technical field of immersed tube tunnels, in particular to a curve segment immersed tube binding jig frame supporting device and supporting method. The curve segment immersed tube binding jig frame supporting method comprises the steps of 1, mounting a fixed beam to a sliding rail; 2, binding a stirrup lower limb of bottom plate steel bars and first layer steel bars inhorizontal and vertical directions; 3, positioning and mounting a load sharing beam, and completing bottom plate steel bar binding; 4, mounting, adjusting and fixing a jig frame basic support. According to the curve segment immersed tube binding jig frame supporting device and supporting method, the load sharing beam is mounted, and therefore the gravity of the jig frame basic support can be vertically conducted to the load sharing beam downwards, and then, the gravity is transmitted to the fixed beam through the load sharing beam, so that the problem is addressed that because the shift of the horizontal position of segments of a curve segment immersed tube, the gravity of the basic support cannot be vertically conducted to the fixed beam downwards, so that it is ensured that the gravitycenter does not deviate, the support of the basic support is more stable, and therefore a curve segment immersed tube binding jig frame is high in stability and does not deform in the process of binding and pushing.

The invention belongs to the technical field of vertical agriculture, and particularly relates to a vertical agriculture picking mechanism which comprises a self-walking device, a dump device and a picking device. The dump device is installed on the self-walking device and is a vertically-arranged S-shaped through pipe, and an inlet and an outlet are formed in the two ends of the S-shaped throughpipe respectively. The inlet extends upwards and is communicated with a discharging port of the picking device, the outlet extends downwards, and the discharging port is higher than the S-shaped through pipe. The problem that high-position fruit picking of a picking mechanism in vertical agriculture is not efficient and stable enough is solved.

The invention discloses a high ground clearance and variable wheel distance and axle distance type plant protection machine. The high ground clearance and variable wheel distance and axle distance type plant protection machine comprises an upper vehicle frame and a lower vehicle frame, wherein the upper vehicle frame and the lower vehicle frame are connected by a miniature rotary platform; a power system, a main variable-speed system, a hydraulic system, a driving operation system, a pesticide spraying and pollinating system, a fertilizer applying system, and the like are symmetrically arranged around a central rotary platform according to a gravity center balance ratio principle; the lower vehicle frame is mainly provided with four foldable and telescopic support legs, and the walking, steering, change of wheel distance and axle distance, adjusting of ground clearance and gravity center height, and other functions of the machine are realized by a corresponding wheel rim transmission system. The invention also discloses the wheel rim transmission system; by utilizing the mixed transmission type of universal transmission, chain wheel transmission and bevel gear transmission, the wheel distance and axle distance can be adjusted. The high ground clearance and variable wheel distance and axle distance type plant protection machine has the advantages that the structure is compact, the function is complete, the working is stable, the application range is wide, the cruising ability is strong, the operation is easy, and the operation efficiency is high. The wheel rim transmission system has the advantages that the stability and operability are good, the driving force is large, the effect of one machine with multiple functions is realized, and the requirement of whole machine is met.