234results about How to "Great traction" patented technology

The utility model relates to the technical field of tractor equipment, and discloses a width-adjustable amplitude-variable crawler-type tractor which comprises a box body, an upper crawler belt structure and a lower crawler belt structure, an operation panel is arranged on the front face of the box body, a rectangular plate is fixedly installed on the front face of the box body, an adjusting mechanism is arranged in the box body, and the upper crawler belt structure and the lower crawler belt structure are arranged in the box body. A limiting mechanism is arranged in the rectangular plate, the distance between the upper crawler belt structure and the lower crawler belt structure can be adjusted, traction and transportation of to-be-dragged objects of various thicknesses are facilitated, and when the upper crawler belt structure and the lower crawler belt structure are abraded for a long time and clamping force is insufficient, the clamping force is not enough. The upper crawler belt structure and the lower crawler belt structure can still keep stable clamping force under the action of the rolling wheels, slipping is avoided, stability is kept, the limiting column A and the limiting column B can be adjusted according to adjustment of the upper crawler belt structure, a traction object is limited up and down, the distance between the two limiting columns C is adjustable, and the space between the two limiting columns C is adjustable. Limiting can be achieved by adjusting according to the width of an object to be dragged.

The invention provides a loader driven by double motors and a maintenance method thereof, and relates to the technical field of engineering mechanical equipment, the loader comprises a frame, a cab and wheels arranged on the frame, a bucket arranged at the front end of the cab, a working device arranged at the right rear end of the frame, and a walking device arranged at the left side of the frame; the working device is arranged above the right side of the walking device; the working device comprises a working motor, a first fixing piece and a second fixing piece; the walking device comprises a walking motor, a third fixing piece, a fourth fixing piece, a fifth fixing piece and a sixth fixing piece. The first fixing piece is fixed with the rear end of the frame; the second fixing piece, the third fixing piece and the fourth fixing piece are fixed with the right lower end of the frame; and the fifth fixing piece and the sixth fixing piece are fixed with the left lower end of the frame. A pure electric driving system is adopted, and the working device and the walking device are driven by double motors to work, so that emission of carbon dioxide and other harmful gases is effectively reduced, and noise pollution is reduced.

The invention relates to a crawler-type transportation platform in the field of transportation equipment, which comprises a transportation platform body, and the transportation platform body comprises a carrying hopper arranged at the upper end, a crawler-type chassis mechanism arranged at the lower end and a steel frame arranged between the carrying hopper and the crawler-type chassis mechanism; a reduction gearbox assembly is arranged at one end of the crawler-type chassis mechanism, a tensioning wheel assembly is arranged at the other end of the crawler-type chassis mechanism, and a belt supporting wheel assembly is further arranged on the crawler-type chassis mechanism. Loading wheel assemblies are arranged on the two sides of the bottom end of the crawler-type chassis mechanism, and a balance wheel assembly is further arranged between the loading wheel assemblies; the outer side of the crawler-type chassis mechanism is sleeved with a crawler belt, and the crawler belt is arranged in a continuously-closed annular shape. An engine assembly is further arranged on the transportation platform body in a matched mode. The ground contact area is large, the pressure to the ground is small, rollover is not prone to occurring in the transportation process, and the passing performance on the soft ground is good; the power is stable, the traction force is large, heavy materials can be carried, the transportation efficiency is improved, and the cost is reduced.

The utility model provides a leveling crawler chassis of a corn harvester in hills and mountains. The leveling crawler chassis comprises a frame, a walking crawler frame, a walking crawler, a left leveling hydraulic cylinder, a right leveling hydraulic cylinder and a rocker arm mechanism, the walking crawler belt is mounted on the walking crawler belt frame; the frame is a rectangular frame and is fixedly connected to the bottom of the corn harvester; two hydraulic cylinder upper supports are arranged on the inner end surfaces of two middle longitudinal beams of the frame; piston rod ends of the left leveling hydraulic cylinder and the right leveling hydraulic cylinder are hinged to two hydraulic cylinder upper supports of the frame, and cylinder body ends of the left leveling hydraulic cylinder and the right leveling hydraulic cylinder are hinged to two hydraulic cylinder lower supports fixedly connected to the upper end faces of two longitudinal beams of the walking crawler frame; and the two groups of rocker arm mechanisms are fixedly connected between the frame and the walking track frame at a certain interval along the longitudinal axis of the leveling track chassis.

The utility model relates to the technical field of water body suspended matter treatment, and discloses a water surface suspended matter cleaning device which comprises a box body, floating assemblies are arranged on the front face and the back face of the box body, a storage cavity is formed in the top of the box body, a collecting net bag is arranged in the storage cavity, and inlets are formed in the left side and the right side of the box body and correspond to the storage cavity. And shifting-in assemblies are symmetrically arranged on the inner walls of the two inlets. According to the floating object collecting device, floating objects are collected through the conveying effect of the pump body and the intercepting effect of the collecting net bag, in the collecting process, by arranging the shifting-in assembly, in the process that the pump body drives water flow to flow in the liquid outlet pipe, the water flow drives the spiral blade to rotate, and then the rotating shaft and the arc-shaped plate are driven to rotate through the transmission shaft; under the driving effect of rotation of the arc-shaped plate, the entering of the floating objects and the floating garbage into the collecting net bag can be accelerated, and under the stirring effect of the arc-shaped plate, the traction force on the floating objects can be improved, and the collecting effect is improved.

The utility model discloses a filling and sealing machine which comprises a traction mechanism, a filling and sealing mechanism, a finished product roll material storage mechanism and a cutting mechanism, the finished product roll material storage mechanism is arranged between the filling and sealing mechanism and the cutting mechanism, the finished product roll material storage mechanism comprises a material storage station for storing finished product roll materials and a feeding part for conveying the finished product roll materials to the cutting mechanism, and the feeding part intermittently conveys the finished product roll materials; and the traction mechanism is used for continuously conveying finished product roll materials to the material storage station. The traction mechanism continuously conveys finished roll materials, the finished roll materials are stored in the material storage station, and the feeding component conveys the stored finished roll materials to the cutting mechanism, so that the length of the finished roll materials conveyed to the cutting mechanism by the feeding component is not influenced by the operation of the filling and sealing mechanism and the conveying of the traction mechanism; the fixed-length conveying of the feeding component is accurate, and the cutting mechanism is accurate in cutting if the fixed-length conveying is accurate.

The utility model relates to a molten iron injection device for pig iron casting. The molten iron injection device comprises an installation base, an installation frame and a supporting frame are arranged at the top of the installation base, a ladle is rotationally connected to the installation frame, universal wheels are arranged at the bottom of the installation base, a transmission motor is arranged at the top of the supporting frame, and an output shaft of the transmission motor is fixedly connected with a wire pile. According to the molten iron injection device for pig iron casting, by arranging the limiting assembly and the limiting unit, the effect of limiting a ladle can be effectively achieved in the using process of the molten iron injection device, so that it is guaranteed that the molten iron injection device can be transferred more stably in the casting process, and the situation that molten iron in the molten iron injection device is splashed out is avoided. By arranging the supporting frame and arranging the transmission motor and the wire pile on the supporting frame, a good traction effect can be achieved on the ladle through the traction rope, a worker can conveniently topple over the ladle in the casting process, and the situation that the worker needs to manually topple over the ladle is avoided.

The invention provides a tractor inflation and deflation system and method and a tractor. A tractor inflation and deflation system comprises a control valve set, an air source, a plurality of wheel side valves, a plurality of tires, a front axle and a rear axle, the control valve set is connected with the air source and the wheel side valves through pipelines, the wheel side valves are connected with the tires, and the tires are installed on the front axle and the rear axle respectively.

The invention relates to a buried pipeline defect detection device, which belongs to the buried pipeline nondestructive testing technology, and comprises a magnetic focusing mechanism, the magnetic focusing mechanism comprises a chassis, and each rotating frame unit can slide left and right around a fixed shaft; at least one exciting coil posture adjusting device is arranged on each rotating frame unit in a sliding mode, an exciting coil is arranged in each exciting coil posture adjusting device, and the exciting coils can rotate in the up-down direction and the front-back direction in the exciting coil posture adjusting devices; wherein the exciting coil posture adjuster can slide left and right around the fixed shaft along with the rotating frame unit so as to adjust the position of the exciting coil on the exciting coil posture adjuster, and the exciting coil posture adjuster can slide up and down on the rotating frame unit so as to adjust the height of the exciting coil; the exciting coils can also adjust the postures of the exciting coils by turning over in the up-down direction and the front-back direction in the exciting coil posture adjusting devices, so that the exciting coils in the exciting coil posture adjusting devices on the multiple rotating frame units reach the condition of magnetic focusing.

A planetary gear transmission (4) is arranged on the outer side of a first support (1), the planetary gear transmission (4) comprises an input end (7) and an output end (8), a gearbox (5) is arranged on the outer side of a second support (2), the gearbox (5) comprises an input shaft (9) and an output shaft (10), the input shaft (9) is connected with a first clutch (6), and the first clutch (6) is connected with a power unit (11); the output shaft (10), the planetary gear transmission (4) and the winding drum (3) are coaxially arranged, the output shaft (10) is connected with the input end (7), and the output end (8) is connected with the winding drum (3); the power unit (11) drives the winding drum (3) to rotate through the output end (8) after being subjected to speed change through two sides of the gearbox (5) and the planetary gear transmission (4); the winch is suitable for being used in cooperation with an engine, but the size is small, and the weight is light.

The utility model discloses a flat plate type chassis of an agricultural unmanned trolley, which belongs to the technical field of agricultural vehicle parts, aims at solving the problem that the loss rate of crops is increased due to the fact that the agricultural vehicle generates large vibration in the driving process, and comprises a chassis frame, and two front wheels are rotatably arranged at the bottom of the chassis frame close to the front end. Two rear wheels are rotatably mounted at the positions, close to the rear end, of the bottom of the chassis frame, the cushioning mechanisms, the transverse cushioning springs and the longitudinal cushioning springs are matched, under the action of the pipe sleeves and the damping rods, vibration borne by the box body can be buffered, the situation that the vibration is transmitted into the storage box from the chassis can be effectively reduced, and the storage box is convenient to use. By means of the technical scheme, the vehicle can run more stably, the stability and safety of crops in the transportation process are improved, the crops can be prevented from being excessively squeezed, collided and damaged in the transportation process, and especially for easily-damaged fruits and vegetables, the shape and quality of the fruits and the vegetables can be kept, and the loss rate is reduced.

The present invention relates to an asymmetric rolling joint device of a surgical instrument, and more particularly to an asymmetric rolling joint device of a surgical instrument in which contact rolling surfaces of mutually facing joint links are asymmetrically formed to increase a traction force. To this end, there is disclosed an asymmetric rolling joint device of a surgical instrument, characterized by comprising: a first joint link portion for forming a joint of a surgical instrument; and a second joint link portion in rolling contact with the first joint link portion, contact rolling surfaces of the first joint link portion and the second joint link portion in mutual rolling contact being asymmetrically formed to relatively increase a traction force as compared to symmetry.

The present invention discloses a weighing and boosting device arranged on an online friction belt conveyor. The method of the present invention comprises: two groups of weighing devices and one group of boosting devices, the boosting device is fixed between the two groups of weighing devices; the weighing device comprises a conveyor belt, rollers, etc., the rollers are placed below the conveyor belt, the bearing plate is placed below the rollers, and the weighing sensor is placed below the bearing plate; the boosting device is composed of an upper crossbeam and two end structures, the upper crossbeam is placed above the conveyor belt, the two end structures are arranged in the same symmetrical manner, and are composed of a support frame, an upper gear, etc., the support frame is provided with horizontal holes and inclined holes, the upper crossbeam passes through the horizontal hole, the upper gear passes through the upper crossbeam, one end of the long round tube passes through the inclined hole, and the other end contacts the side of the conveyor belt, the sleeve passes through the long round tube, the lower gear meshes with the upper gear, the spring is sleeved on the long round tube, one end contacts the sleeve, and the other end of the spring contacts the raised baffle of the long round tube. The present invention can realize controllable tension of the conveyor belt, has low cost, and is easy to maintain.

The utility model belongs to the technical field of pile stabilizing systems, and particularly relates to a high-efficiency self-walking and self-positioning amphibious pile stabilizing system which comprises a driving unit, height adjusting mechanisms installed on all walking mechanisms, and a holding arm mechanism installed on a sleeve of a main body structure frame and rotationally connected with the sleeve. The driving unit is in communication connection with the walking mechanism, the height adjusting mechanism and the holding arm mechanism, controls the walking mechanism to move to a target station based on information of the corresponding sensors, controls the height adjusting mechanism to adjust the height of the holding arm mechanism and the perpendicularity of the central axis of the pile foundation vertical limiting rings, and adjusts the distance between the pile foundation vertical limiting rings. Self-walking and self-positioning in the near sea area can be achieved, self-walking and self-positioning in the mud flat can also be achieved, the overall influence of wind waves and flow is small, the environmental adaptability is high, the perpendicularity of the pile foundation guide pipe can be automatically adjusted, and the piling perpendicularity requirement is met; and the positioning precision among four piles in one group can be accurately controlled.

The present invention relates to a tire mold, comprising a tread mold portion divided into a plurality of mold segments in a circumferential direction of the tire, each mold segment having a lateral edge and movable in a corresponding operating direction between (i) an open position in which the mold segments are spaced apart from each other and (ii) a closed position in which two adjacent mold segments contact each other via one of their lateral edges, each mold segment comprising a plurality of blades for molding transversely extending pattern slits on a tire tread surface, wherein at least a first of the mold segments has a transversely extending blade located at a first lateral edge, and at least a second mold segment adjacent to the first mold segment has a transversely extending blade located at a second lateral edge adjacent to the first lateral edge of the first mold segment, and when the mold segments are in the closed position, the transversely extending blades located at the first lateral edge of the first mold segment are interlocked between the transversely extending blades located at the second lateral edge of the second mold segment.

The present invention discloses a lumbar traction and reduction device, which relates to the technical field of medical devices, comprising: a base, support plates are fixedly installed on both sides of the top surface of the base, a rotating column 1 is rotatably connected between the two support plates, a driving motor 1 is fixedly installed on the side wall of one of the support plates, the output shaft of the driving motor 1 is connected to the side wall of the rotating column 1, a sleeve rod 1 is fixedly installed on the outer surface of the rotating column 1, a backrest is fixedly installed on the outer surface of the sleeve rod 1, a contraction groove is provided on the rear side wall of the backrest, a shoulder pillow is installed on the rear side wall of the backrest through an adjusting component, and a headrest is fixedly installed on the rear side wall of the shoulder pillow. The present invention realizes the detection of the patient's lumbar strength, massage and relaxation of the waist, the detection of the fit between the lumbar spine and the backrest, and multi-directional traction adjustment through the detection component, the adjustment component and the rotating component, thereby providing a safe, comfortable and effective lumbar traction and reduction treatment plan for the patient.

The present invention discloses a walking power system of an electric loader with dual motor input and a control method thereof, comprising a drive motor and a gearbox, wherein the drive motor is connected to the gearbox input shaft; the drive motor comprises a main drive motor and an auxiliary drive motor, and the gearbox comprises a main drive input shaft, an auxiliary drive input shaft, an intermediate shaft and an output shaft, wherein the main drive motor is connected to the main drive input shaft, and the auxiliary drive motor is connected to the auxiliary drive input shaft; the main drive input shaft is connected to the output shaft through a gear transmission pair, and the intermediate shaft is respectively connected to the auxiliary drive input shaft and the output shaft through a gear transmission pair. Beneficial effects: Under light load conditions, the present invention enables only the main drive motor to be enabled, which can save more energy and improve the endurance of the vehicle; through the cooperation of different transmission routes of the two motors, the loader can obtain greater traction; the main controller selects the corresponding control strategy according to the current working conditions to realize automatic control of the gearbox.

The utility model discloses a range hood which comprises a machine head and a smoke barrier integrally formed with the machine head and arranged in a smoke barrier area of the machine head, the smoke barrier is arranged in a protruding mode in the direction opposite to the direction in which oil smoke is sucked, and the smoke barrier is arranged in the radial direction in which the oil smoke is sucked. A smoke collecting cavity arranged on the peripheral side of the smoke baffle in a surrounding mode is formed between the side wall face of the smoke baffle and the inner wall face of the machine head, and an air inlet allowing oil smoke to enter is formed in the annular wall of the smoke baffle. According to the range hood, the integrally-formed structure is adopted, the number of external components of the range hood is reduced, a user can clean the area leaked out of the range hood more conveniently, the cleaning work is simplified, and the cleaning convenience of the user is improved. The design of the smoke barrier can effectively reduce the speed of oil smoke and guide the oil smoke to flow around along the surface of the lower panel, so that the traction force of air inlet airflow to the oil smoke is increased, and the oil smoke trapping efficiency is improved. The air inlet is formed in the inner side annular wall of the annular smoke collecting cavity, so that a surrounding effect is formed to wrap the oil smoke, and the oil smoke is effectively prevented from escaping.

The utility model relates to aluminium material processing equipment technical field discloses a track type aluminium profile tractor, a track type aluminium profile tractor, including lathe, tractor, gyro wheel column, tool bit, the outside fixed connection of lathe has the frame, the outside fixed connection of frame has the slide rail, the inside fixed connection of column box has first air cylinder, the utility model has the following advantages and effect: the tool bit is closed through the effect of first air cylinder to fix one end of aluminium material between tool bit and clamping plate, then through the movement of tractor drives the aluminium material fixed between tool bit and clamping plate to move, when the tractor moves, square hole and slide rail sliding connection make the tractor do linear motion along the slide rail, make the aluminium material do linear motion when drawing the aluminium material, prevent the phenomenon that the aluminium material is bent when being drawn, realize the effect of good aluminium material drawing effect through the above operation.

The invention relates to the field of agricultural machinery, in particular to a self-propelled corn harvester which comprises a crawler trolley, a portal frame arranged above the crawler trolley, a clamping mechanism fixed to the portal frame and a picking roller, and the clamping mechanism comprises a main beam inclining downwards from the tail to the head and a dividing assembly protruding out of the portal frame. The picking roller is connected to the tail part of the main beam and forms a lateral extrusion space with the clamping mechanism; the technical problems that a corn harvester is difficult to adapt to complex terrains, occupies too large space and cannot flexibly steer, energy consumption in the picking process is large, extrusion damage to corncobs in the picking process is large, and the quality of the corncobs is poor are solved. The flexible adaptive capacity and the use stability of automation in complex terrains are enhanced; the occupied space of the corn harvester is reduced, and flexible steering of the corn harvester is facilitated; extra power input is not needed in picking, energy consumption in the picking process is reduced, picking is more labor-saving, and the picking quality of the corncobs is improved.

The utility model discloses a kind of air-jet loom auxiliary nozzle groups of enhanced airflow, it is related to the technical field of auxiliary nozzle of air-jet loom.The utility model includes outer thread pipe, the outer thread pipe top is fixedly connected with air jet seat, the air jet seat top is fixedly connected with mounting seat, the mounting seat top is fixedly connected with connecting pipe, the first shrinkage cavity is arranged in the mounting seat inner chamber, the connecting pipe is fixedly connected with shrinkage tube with the end away from the mounting seat.The utility model is compressed air by outside through the first shrinkage cavity of mounting seat, completes first acceleration, then, through the second shrinkage cavity of shrinkage tube, realize the second acceleration of airflow, then, through transition pipe, complete third acceleration, finally, airflow is sprayed through the side of flat tube gradually shrinkage type small circle air outlet, because small circle air outlet length is less than the wall thickness of flat tube and aperture is reduced from inside to outside in flat tube, realize fourth acceleration, by compressed air four times acceleration, form high-speed airflow beam to drag weft yarn.

The invention provides an aluminum alloy bar reducing casting device and method, and relates to the technical field of casting, the device comprises a tundish, a crystallizer, a structure control device and a traction device; the structure control device is composed of a first sleeve and a cooling module, a reducing cavity is formed in the first sleeve, the inner diameter of the reducing cavity is gradually reduced from the first end to the second end, and the reducing cavity is used for cooling and solidifying the solid-liquid aluminum alloy bar; the traction device comprises a traction head forming die and a power device, the traction head forming die is located at the second end of the reducing cavity, and the power device drives the traction head forming die to move horizontally to pull out the aluminum alloy bar; through plastic deformation and cooling solidification in the reducing cavity, internal defects such as shrinkage porosity of the aluminum alloy are eliminated, grains are refined, and the structure is more compact and uniform; the traction force is improved through tight connection of the traction head and the bar, and the stability of the continuous casting process is enhanced; and the traction rate is accurately adjusted by the power device, so that the aluminum alloy bar which is compact in structure and small and uniform in grain size can be obtained.

The invention discloses a stubble cleaning and slurry stirring soil preparation machine for a paddy field. The machine comprises a connecting base, a folding module, a driving module, a soil turning module, a lengthening module and a fertilizer spraying module; a connecting beam slides in the connecting seat and is connected with a mounting seat; the folding stirrer is connected to one side of the mounting seat; the driving module is connected to one side of the connecting seat through the suspension module; the soil turning module is connected to one side of the folding module. The folding module supports folding and unfolding functions and allows the lengthening module to be inserted into the gap after the lengthening module is unfolded, so that flexible adjustment of the working width is achieved. The fertilizer spraying module integrates the fertilizer spraying function, fertilizer spreading can be carried out while stubble cleaning and slurry stirring are carried out, the overall operation efficiency is improved, and extra working steps needed by independent pesticide spraying are reduced.

The utility model relates to an all-steel truck tubeless radial tire tread pattern structure and a tire. The pattern structure comprises first longitudinal pattern grooves which are formed in the center of the tire crown and are distributed along the circumferential direction of the tire tread; the second longitudinal pattern grooves are uniformly formed in the two sides of the first longitudinal pattern grooves and are distributed in the circumferential direction of the tire tread; and a lateral pattern portion interposed between the first longitudinal groove and the second longitudinal groove. Compared with the prior art, the tire disclosed by the utility model has good guidance quality, drainage performance, road holding force, puncture resistance and sideslip resistance under high-speed driving, and the traction force and the lateral force of the tire are improved by continuously changing pattern groove angles.

An intramedullary nail (1) for long bone traction comprises a first tube (3) extending along the axial direction of the intramedullary nail (1); a second tube (5) extending along the axial direction of the intramedullary nail (1), the second tube (5) being coupled to the first tube (3) so as to be axially movable with respect to each other; a first locking opening (7) located in the end region of the first tube (3) away from the second tube (5); and a coil (11) arranged in the coil region of the first tube (3) between the first locking opening (7) and the second tube (5).

The utility model discloses a kind of all terrain loaders of wheel-track composite drive, it is related to engineering technical field, comprising: vehicle body and at least one group wheel-track switching walking mechanism, wherein each group wheel-track switching walking mechanism includes: driving shaft, for receiving power input;Multiple tensioning wheel hubs, by multiple tensioning hydraulic devices and multiple wheel-track switching telescopic hydraulic devices are installed on the support;Track, it is arranged at the outside of tensioning wheel hub, annular protrusion or groove is arranged in its inside side;Tensioning hydraulic device and wheel-track switching telescopic hydraulic device are used to drive tensioning wheel hub to realize displacement and attitude change.The utility model sets up tensioning hydraulic device and wheel-track switching telescopic hydraulic device to drive the tensioning wheel hub to realize displacement and attitude change by being arranged as wheel-track switching walking mechanism, make track switch between circle and polygon, to reach the purpose of wheel-track switching of walking mechanism.

The invention relates to the technical field of bridge erection construction, and discloses a large-span continuous-span steel beam belt buckle tower top pushing construction device and method.The large-span continuous-span steel beam belt buckle tower top pushing construction device comprises a pushing platform, a guide beam and a steel beam, the top of the pushing platform is slidably connected with the steel beam, and one end of the guide beam is fixedly connected with the steel beam; the tops of the guide beam and the steel beam are fixedly connected with a plurality of anchoring connecting seats; according to the large-span continuous-span steel beam belt buckle tower pushing construction device and method, the problems that in the prior art, in the large-span pushing construction process, in the maximum cantilever state, the steel beam is large in downwarping, local bending and large in load, and deformation and instability are caused are solved; the length and the weight of the guide beam structure are increased, the wind resistance and the stability of the structure are reduced, and the design difficulty of the guide beam is increased; and meanwhile, the control and operation difficulty of the pushing equipment can also be increased. The construction difficulty is increased, and the construction cost is also increased.

The utility model belongs to the technical field of agricultural machinery, and particularly relates to four-wheel miniature tillage equipment which comprises a power assembly and further comprises a front gearbox, a second steering transmission part, a rear transmission case, a front axle, a rear axle, a tillage mechanism and an adjusting structure. The front gearbox is in transmission connection with the rear transmission case through a second steering transmission part; the power output of the front gearbox drives a front wheel shaft, the power output of the rear gearbox drives a rear wheel shaft and a tilling mechanism, and the front wheel shaft and the rear wheel shaft are both provided with walking wheels; the adjusting structure is used for adjusting the height of the tillage mechanism; the utility model aims to realize a four-wheel-drive tillage mode, has larger traction force under all road conditions, and can ensure uniform tire wear and increase of starting and climbing capabilities; the tilling depth of the tilling mechanism can be adjusted through the adjusting structure, and the tilling mechanism is suitable for various tilling conditions.

An embodiment of the present invention provides a transparent orthodontic device comprising: a transparent orthodontic body forming a passage for accommodating a tooth to be orthodontic in order to move the tooth from an initial position to a target position; and an occlusal part which is defined in the transparent orthodontic body and is located in an occlusal region in contact with an involution tooth during occlusal. And the thickness of the occlusion part is greater than the thickness of the area except the occlusion part.