69results about How to "Lower the ground clearance" patented technology

The invention relates to an electric commercial vehicle battery box single-trip replacement robot which has the advantages of reducing the land occupation because the size of a replacement robot is effectively reduced, and being easily matched with an electric bus because an installing mode of a battery replacement device in the existing replacement robot is changed into a suspension installing mode. The electric commercial vehicle battery box single-trip replacement robot comprises a frame assembly, wherein the frame assembly is arranged on a walking assembly, a temporary storage rack is arranged at one side of the frame assembly, a control cabinet is arranged at the other side of the frame assembly, a lifting transmission assembly is arranged at the top of the frame assembly and is connected with a lifting assembly and also connected with a balance weight assembly, an objective table assembly capable of rotating in situ is suspended at the lower part of the lifting assembly, a fork assembly and a battery push handle assembly are arranged at the bottom of the objective table assembly, V-shaped wheel sets matched with a rectangular steel upright of a replacement robot frame are arranged at four corners of the lifting assembly, an objective table assembly rotating drive device is arranged on the lifting assembly, and a limit device is arranged on the objective table assembly.

The invention discloses an ultra-wide garbage grinding and collecting device. The device comprises a suction port body, casters and a suction port, wherein a garbage grinding device is installed on the front part of the suction port body, a reverse blowing cavity is formed behind the sucking port in the sucking port body and is provided with a reverse blowing port which is communicated with an external dust absorbing fan, conical barrels are symmetrically arranged on the left side and the right side in front of the sucking port body, and sucking port sweepers are installed in the conical barrels and on a sweeper motor. The device has the characteristics of suitability for thoroughly sweeping different pavements, capability of grinding and collecting larger garbage, large garbage collecting working surface, high cleaning efficiency, low energy consumption and convenience in sweeper changing.

The invention discloses a fatigue test device of a rubber bearing. The fatigue test device is arranged on a test platform and comprises a clamping mechanism, bearing seats and an oscillating bar, wherein the bearing seats are provided with rotary central spindles and are symmetrically arranged at the two ends of the clamping mechanism; and the oscillating bar is connected with the outer end of a bearing seat. Due the adoption of the bearing seat, the distance between the rotary central spindle of each bearing seat and the ground is lowered greatly, the rigidity of the entire fatigue test device is enhanced greatly, and situations such as the overall deformation of the fatigue test device under the action of single tensile pressure, easy breakage of the rotary central spindle due to long-time use and the like are avoided. The fatigue test device is convenient to use and maintain, and the using performance of the fatigue test device cannot be lowered and the service life of the fatigue test device cannot be shortened at a high temperature and a low temperature.

A pipe lifting and transporting vehicle based on caterpillar earth mover or wheel-type loader features that it has foldable hydraulic hoist and hydraulic supporting frame.

The invention discloses an intelligent corridor mobile unit, a device and a system using the unit, which include a guide rail installed on the handrail side of the stairs, a carrying trolley that can slide along the guide rail, a motor installed at the corridor platform, and a motor for driving the motor to start and stop. The drive controller and the transmission device, the transmission device includes a toothed chain, a sprocket and a worm reducer installed on the corridor platform, the motor is connected with the worm reducer, and the worm reducer drives the toothed chain to drag through the sprocket The carrying trolley moves up and down along the guide rail. The present invention uses a toothed chain and a sprocket for transmission, which is more stable and safer; the motor is installed at the corridor platform, so that the thickness of the carrying trolley is compressed to the thinnest, reducing the occupation of the corridor space; two adjacent The intelligent corridor mobile unit shares the same motor and worm gear reducer, and at the same time pulls the trolleys up and down the two floors of stairs toward each other, which reduces costs, saves energy and protects the environment, and has high transportation efficiency.

The invention relates to a dual-use automotive self-rescuing, translation and in-situ turning-around or turning device. By adopting the device, various types of vehicles such as a small / medium-sized field vehicle, an intermediate / high-grade bullet-proof vehicle, a small vehicle, a city recreation vehicle (CRV), a sport utility vehicle (SUV), a jeep, an off-road vehicle and a minibus can be self-rescued from dangers when wheels are in danger, or vehicle bodies can be translated in narrow sites, and the vehicles can freely turn around or turn. According to the device, four double-acting multilayer telescopic hydraulic cylinders are used, wherein one double-acting multilayer telescopic hydraulic cylinder is arranged on each of a headstock and a tailstock, and the other two double-acting multilayer telescopic hydraulic cylinders are used for a middle part; and steel plate turntables with steel balls in the middles and low-speed torque motors with gears serving as small wheels are matched, so that the vehicles such as the small vehicle can turn a certain angle by own capability when the wheels are in danger, so as to get out of danger and automatically leave, and the vehicle bodies can be translated and turned around or turned in narrower places without larger turning radiuses, so as to leave a congested traffic flow and the like. The device can also have an antitheft function.

The invention discloses a heavy-load wheel type robot adjustable suspension device which comprises a suspension support. Guide device fixed ends are arranged on the suspension support. The upper endsof elastic elements are sleeved with inner cavities of guide device movable ends and supported through the inner cavity walls, and the lower ends of the elastic elements are only supported through lead adjusting blocks. The lead adjusting blocks are installed in lead adjusting block installation holes of the suspension support and can move in the lead directions. By the adoption of the suspensiondevice, through change of the compression amount of springs of a suspension and the relative positions of upper peaks and lower peaks of the springs of the suspension, the ground clearance of a robotis changed, the chassis passing ability is improved, and the capacity of penetrating the bottom of a vehicle or an obstacle is improved; according to the evenness condition of an actual running road surface of the wheel type robot, the rigidity of the suspension can be increased, and the pose keeping ability of the robot moving on the uneven road surface is improved; and the suspension device is particularly suitable for the ultrathin wheel type robot.

The invention discloses a large freight vehicle tail anti-impact device which comprises a front face impact board. An oblique board is arranged at the upper end of the front face impact board. A height adjusting mechanism fixed to the tail end of a vehicle girder is arranged on the inner side of the oblique board. A connecting frame is arranged on the inner wall face of the front face impact board. A limiting buffering mechanism located on the two sides of the tail of the vehicle girder is hinged to the two ends of the connecting frame and located on the inner side of the height adjusting mechanism. The limiting buffering mechanism comprises two bases fixed to the vehicle girder. A horizontal guide rod is arranged between the two bases and sleeved with a horizontal sliding seat. The horizontal sliding seat is hinged to the connecting frame. A buffer spring is further arranged on the side face of the horizontal sliding seat, wherein the horizontal guide rod is sleeved with the buffer spring. The large freight vehicle tail anti-impact device has the beneficial effects that the safety protection performance can be improved.

The invention provides a high-yield tomato cultivation technology, which comprises the following steps: seed treatment-seedling cultivation-soil preparation-planting-pruning-management-harvesting. The invention has the advantages that the tomato grows fast in the early stage, bears early results and has high yield. After oblique planting and colonization, due to the effect of gravity, the tomato stems will grow close to the ground before the stems are inserted. Since the tomato stems can grow adventitious roots, the stems entering the ground will be lengthened and the plant's planting position will be increased. , so that the tomato root system is significantly developed compared with direct planting; the absorption and utilization of soil nutrients are significantly improved, the seedlings are slowed down at the seedling stage, the survival rate is high, the leaf area and weight per plant are significantly increased, the early growth is accelerated, organic matter is accumulated, and flowering Early fruiting, early maturity, high yield, 15% to 20% higher yield than direct planting. In addition, the height of the tomato plant is reduced, preventing the plant from lodging after fruiting, improving ventilation and effectively reducing the incidence of disease.

The invention belongs to the field of industrial automation, and particularly relates to a robot self-propelled chassis. The robot self-propelled chassis comprises a chassis (1), a connecting mechanism (15), a front axle steering system, a rear axle steering system and a hydraulic lifting system, wherein the connecting mechanism (15) is arranged on the chassis (1); the front axle steering system is arranged on the front part of the chassis (1), and comprises a steering stepping motor-reducer group (4), a front axle (3), a steering system bearing (5), a front axle bevel gear (6) and a steering wheel system (2); the rear axle steering system is arranged on the rear part of the chassis (1), and comprises a driving motor-reducer group (12), a rear axle (12), a driving system bearing (13), a rear axle chain wheel (9) and a driving wheel system (8); the hydraulic lifting system comprises a hydraulic cylinder (14), a hydraulic oil source system, a synchronous valve and a hydraulic pipeline; and the hydraulic cylinder (14), the hydraulic oil source system and the synchronous valve are communicated through the hydraulic pipeline.

The invention discloses a high-yield cultivation method for banana tomatoes. The method comprises the following steps: (1) preparation before sowing; (2) seed treatment; (3) seeding and seedling raising; (4) fertilization and field planting; (5) management after field planting; (6) flower retention and fruit setting; and (7) fertilizer and water management. The high-yield cultivation method for the banana tomatoes provided by the invention can reduce a disease incidence rate, and improve the yield and quality, and the obtained banana tomatoes have an excellent fruit color and flavor, and greatpromotion value.

The invention relates to a potato harvester capable of achieving rear spreading. The harvester comprises a pressing and ridge cutting device, a digger blade, a main frame assembly, a traveling land wheel device, a rear conveying chain driving device, a front conveying chain and a rear conveying chain, wherein the pressing and ridge cutting device and the digger blade are connected to the front end of the main frame assembly, the rear conveying chain driving device is connected to the rear end of the main frame assembly, the traveling land wheel device is connected to the lower side of the main frame assembly, and a front conveying chain driving shaft and a transmission box are arranged on the main frame assembly. By the adoption of the harvester, digging, conveyance, separation and rear spreading can be achieved at the same time, and finally potatoes are picked up, graded and bagged manually.

The invention provides a land-saving elevated pedestrian bridge, which occupies a small area, is low in cost, is suitable for building directly on ordinary urban roads, and is more convenient for pedestrians crossing the road. The characteristics of the land-saving elevated pedestrian bridge are: the bridge pier is set on the separation zone between the motor vehicle lane and the non-motor vehicle lane or on the sidewalk, the stair platform is set on the sidewalk; A combination of stairs and ramps connects.

The invention relates to a cleaning-sweeper-truck suction nozzle structure and a cleaning sweeper truck. The cleaning-sweeper-truck suction nozzle structure includes a suction disc, a sucker assembly and a height adjusting mechanism; a suction port for sucking up garbage on the ground is formed in the suction disc, the sucker assembly is communicated with the suction port, the height adjusting mechanism is connected to the sucker assembly and used for adjusting the above-ground height of the sucker assembly, so that the sucking and picking effect of the suction nozzle structure is improved according to different conditions of the garbage on the ground. A transition structure for connecting the suction port with a sucker is integrally trapezoid, and the size of the portion, communicated with the suction port, of the transition structure is no more than three times that of the portion, communicated with the sucker, of the transition structure. By the adoption of the cleaning-sweeper-truck suction nozzle structure, the above-ground height of the sucker assembly can be flexibly adjusted according to distribution conditions of the garbage on the ground, when a lot of fine garbage is distributed on the ground, the above-ground height of the sucker assembly can be appropriately reduced, and strong suction can be provided for the ground; when a lot of large garbage is distributed on the ground, the above-ground height of the sucker assembly can be appropriately increased, so that the large garbage successfully passes through the sucker assembly, and the sucking and picking performance of the cleaning sweeper truck is improved.

The invention discloses a multifunctional heavy-duty flat-plate wrecker capable of towing three vehicles at a time. The wrecker comprises an automobile chassis and a wrecker top assembly assembled onthe automobile chassis, wherein the wrecker top assembly comprises a wrecker flat-plate, and a sub-frame, a double-layer frame, a flat-plate inclined oil cylinder and a flat-plate telescopic oil cylinder which are arranged below the wrecker flat-plate; the wrecker flat-plate is arranged on the sub-frame; the sub-frame is arranged on the double-layer frame; and the double-layer frame is arranged onthe automobile chassis. The wrecker top assembly also comprises a triangular turnover mechanism arranged below the tail of the sub-frame, the triangular turnover mechanism is fixedly connected with the tail of the double-layer frame and the tail of the sub-frame, one end of the sub-frame is hinged with one end of the double-layer frame through the triangular turnover mechanism, the other end of the sub-frame is connected with the other end of the double-layer frame through the flat-plate inclined oil cylinder, and the wrecker flat-plate and the sub-frame are slidably connected through the flat-plate telescopic oil cylinder and a flat guide rail. The wrecker has the advantages that the stability is good, dragging is convenient, batch production can be realized, and dragging and rescue requirements of various large, medium, heavy equipment, containers, faulted vehicles and the like can be met.

The invention discloses an aluminum discharge vehicle which comprises a vehicle chassis, a gantry and a ladle, wherein the vehicle chassis comprises a frame, a driving cab, a wheel assembly and a power control system assembly; the frame comprises a pair of trolley frames and a trolley frame connecting longitudinal beam; the pair of trolley frames are respectively arranged at the front end and rear end of the trolley frame connecting longitudinal beam; the pair of trolley frames are symmetrically arranged; the driving cab and the power control system assembly are respectively arranged on the two trolley frames; the wheel assembly is arranged at the lower part of the trolley frames; the trolley frame connecting longitudinal beam is arranged at the same side of the pair of trolley frames; the gantry is erected between the two trolley frames in a lifting way; and the ladle is arranged on the gantry. The aluminum discharge vehicle has the advantages of being high in movement flexibility, simple and convenient in operation, safe, reliable, economical and efficient.

The invention relates to an urban overpass system, belonging to that field of road and bridge construction, comprising a longitudinal motor vehicle straight lane and a transverse motor vehicle straight lane, At that junction of the straight lane of the longitudinal motor vehicle and the straight lane of the transverse motor vehicle, An underground platform is arranged on that bottom surface of theconcave pit, A surface platform is arranged directly above that underground platform, the above-ground platform is supported on the underground platform through upright columns, The space between thesubterranean platform and the aboveground platform is used to allow vehicles to pass through, A longitudinal motor vehicle straight lane is a part of that longitudinal motor vehicle drive into the lifting plate toward the above-ground platform and the underground platform, The part of vertical motor vehicles driving out of the above-ground platform and underground platform is vertical motor vehicles driving out of the lifting plate. Compared with the existing overpass system, the area occupied by the vertical motor vehicles is relatively small, the extension length is short, part of the overpass system is located underground, and the height from the ground is low, which greatly reduces the construction cost.

The four-wheel motorcycle consists of two parts of dragging head and body hinged via steering gimbal. The front part of the dragging head is one high-strength collision-proof stereo trussframed struture with steering shaft, steering wheel and bevel gear in the upper part as well as clutch, brake and throttle pedal in the lower part. The bevel rack meshes with the bevel gear is mounted on the cantilever of the dragging head. The driver applies steering torque to the steering wheel for turning. The present invention may be used to replace available two-wheeled and three-wheeled motorcycles as one countryside transportation tool.

The invention discloses a wheel active retraction system of an unmanned driving system test platform dummy vehicle. The wheel active retraction system comprises a retraction mechanism, a pneumatic control system and a high-pressure supply mechanism, wherein a force bearing arm, a rocker arm and a middle force bearing shaft in the retraction mechanism form a fixed whole, wheels and the middle forcebearing shaft can rotate around the axis together, the pneumatic control system adjusts telescopic states of the wheels by means of a double-acting cylinder, and the high-pressure supply mechanism inflates the pneumatic control system. According to the wheel active retraction system, wheel telescoping state control can be carried out actively, so that the test platform dummy vehicle has good obstacle crossing driving performance when an unmanned driving system test is conducted, and the height of the test platform dummy vehicle can be reduced when the test platform dummy vehicle collides withother test real vehicles, thereby avoiding direct collision impact and protecting core components of the unmanned driving system.

The invention discloses a mortar hopper supporting structure for a plastering machine. The mortar hopper supporting structure for the plastering machine comprises a machine body and a mortar hopper mounted on the upper portion of the machine body, and further comprises a sliding barrel and an ejector rod. The sliding barrel is mounted on the machine body and hinged to the mortar hopper integrally, and the sliding barrel can carry out up and down reciprocating motion relative to the machine body. The sliding barrel is further hinged to a hook piece capable of rotating relative to the sliding barrel in a limited range, the hooked piece is pushed through an elastic piece, and a hook portion of the hook piece is maintained to stretch out. The ejector rod is located in the sliding barrel, and is capable of moving longitudinally along the sliding barrel. The upper portion of the ejector rod stretches out of the sliding barrel and is provided with a limiting block. The lower portion of the ejector rod stretches out of the sliding barrel and is provided with a protruding block enabling the hook portion of the hook piece to draw back when the ejector rod moves downwards relative to the sliding barrel. The mortar hopper supporting structure for the plastering machine is further provided with a fixed block which is fixed to the machine body and used for allowing the hook piece to hook. The limited rotation of the hook piece refers to the fact that the hook piece can only rotate from the position where the fixed block is hooked to the position where the fixed block is separated from. The mortar hopper supporting structure for the plastering machine is simple, walls with lower ground clearances can be plastered when the plastering machine is operated, and working efficiency is higher.

The invention discloses a temporary storage rack applied to production of nanometer optical texture film materials. The temporary storage rack comprises a placing table, wherein a rolling device is arranged at each of the left part and the right part of the lower end of the placing table, a sliding chute is formed in the middle of the upper end of the placing table, a sliding clamping device is arranged on the chute wall of the sliding chute, a concentric-square-shaped frame is fixedly installed at each of the left portion and the right portion of the upper end of the placing table, a fixing plate is fixedly installed at the lower portion of inner cavity of each of the two concentric-square-shaped frames, a first threaded rod is connected to the middle of an inner cavity of the right concentric-square-shaped frame in a penetrating mode, the first threaded rod penetrates through the middle of the upper end of a left fixing plate and is fixedly provided with a first positive and negativemotor, and a temporary storage device is arranged in the middle of the outer surface of the first threaded rod. According to the temporary storage rack applied to production of the nanometer opticaltexture membrane materials, clamping rods are driven by a transverse plate to be inserted into limiting holes in a penetrating mode, so that rotating shafts are limited, rollers are prevented from rolling automatically, and the stability is improved.

The invention provides a mixer truck and a crawling ladder device thereof. The crawling ladder device comprises a main ladder and an auxiliary ladder. The main ladder comprises two supporting beams arranged in parallel and at intervals and a connecting beam connected between the bottoms of the two supporting beams, and the two supporting beams are provided with rails extending vertically. The auxiliary ladder comprises an auxiliary ladder main body, slip assemblies symmetrically arranged on the two sides of the auxiliary ladder main body and turnover brackets symmetrically arranged on the twosides of the main ladder, the two slip assemblies are in sliding fit with the two rails correspondingly so that the auxiliary ladder can slide upward to be accommodated in the main ladder or stretch downward out of the main ladder, one end of each turnover bracket is hinged to one side of the middle area of the auxiliary ladder main body, and the other end of each turnover bracket is hinged to thecorresponding slip assembly. When the slip assemblies slide upward, the turnover brackets are turned from the horizontal position to the vertical position, the auxiliary ladder slides upward to be stored in the main ladder; and when the slip assemblies slide downward, the turnover brackets are rotated from the vertical position to the horizontal position, the auxiliary ladder stretches downward out of the main ladder, and the turnover brackets abut against the connecting beam.

The invention discloses a white vehicle body frame. An upper surface of a front floor assembly is flush with the upper surface of a rear floor assembly, a concave spare wheel cabin is arranged on themiddle rear portion of the front floor assembly, and an upper left longitudinal beam and an upper right longitudinal beam are fixed to the upper surface of the front floor assembly in a bilateral symmetry mode. The left upper longitudinal beam and the right upper longitudinal beam are respectively arranged corresponding to the front parts of a left beam and a right beam up and down; a cross beam group comprises a first cross beam, a second cross beam and a cross beam outward extending component which are fixed on the lower surface of the front floor assembly and also comprises a spare wheel cabin upper cross beam, a left seat front cross beam, a right seat front cross beam, a left seat rear cross beam and a right seat rear cross beam fixed to the upper surface of the front floor assembly,the outer side of the left beam and the outer side of the right beam are fixedly connected with a threshold inner plate body through cross beam outer extending assemblies respectively. According to the white vehicle body frame, a multi-force-transmission-path frame structure is formed, the collision force is effectively dispersed, the safety performance of a vehicle is improved, the height of thevehicle is reduced, and the wind resistance of the whole vehicle is improved.

The invention discloses a low-floor pure electric bus, and relates to the technical field of automobiles. The low-floor pure electric bus comprises an underframe, a top cover and a plurality of firstbattery packs, the underframe is of a truss structure formed by splicing a plurality of steel pipes, and a plurality of mounting cabins are arranged in the middle section of the underframe; and each first battery pack comprises a plurality of short battery cell single bodies which are connected in series and in parallel, and the first battery packs are detachably mounted in the mounting cabins. The height of battery compartments is fully compressed by adopting short battery cell monomers in a breakthrough manner, so the ground clearance of the underframe is effectively controlled, one-step stepping can be achieved, the underframe is flat and free of steps, the design of a front-to-back horizontal all-low floor in the bus is achieved, the safety and control stability of the whole bus are improved, and urban bus operation is more efficient.

The invention relates to an electric mechanical stretching device that comprises a driving assembly, a leg placing assembly, a seat frame supporting assembly and a backrest assembly; the seat frame supporting assembly comprises supporting fixing rods and supporting transmission rods which are distributed up and down, the rear ends of the supporting fixing rods and the supporting transmission rodsare hinged to the backrest assembly, the front end of the supporting fixing rod is hinged to the leg placing assembly, a linkage rod is hinged to the front end of the supporting transmission rod, andthe two ends of the linkage rod are hinged to the leg placing assembly and the supporting fixing rods respectively; the driving assembly comprises a driving fixing rod with the two ends connected withthe left supporting fixing rod and the right supporting fixing rod correspondingly, a driving transmission rod with the two ends connected with the left supporting transmission rod and the right supporting transmission rod correspondingly, and a push rod motor arranged between the driving fixing rod and the driving transmission rod used for pushing the driving transmission rod to move relative tothe driving fixing rod to achieve stretching and closing of the device. Compared with the prior art, the electric mechanical stretching device has the advantages of simplified structure, conveniencein functional design of the seat, high comfort level, stability, firmness, high universality and low cost.

The present invention provides a straddle type vehicle, wherein an engine with a belt type stageless speed variator is supported on a vehicle body frame, a cooling pipe of the speed variator is extended toward the front of the vehicle, such a space for placing driver's legs arranged on the left and right of a main frame is ensured greatly. The straddle type vehicle is also provided with an intakepipeline (73) extended from the speed variator box (55), used for sucking cooling wind for the belt type stepless speed variator and communicated with the speed variator box (55), and a front end side (a third extending part 73c) of the intake pipeline is accepted in the right / left width of the main frame (14) and is extended forewards.

The invention relates to an adjustable front bumper treading mechanism for a truck. The adjustable front bumper treading mechanism a tube beam assembly, a left bracket assembly and a right bracket assembly, wherein the left bracket assembly and the right bracket assembly are symmetrically arranged, and two ends of the tube beam assembly are respectively connected to the left bracket assembly and the right bracket assembly in an angle-adjustable manner. When the adjustable front bumper treading mechanism provided by the invention is used, the tube beam assembly can be regulated relative to the left bracket assembly and the right bracket assembly in an advancing direction of an automobile, so that a purpose of being away from a bumper is achieved. Furthermore, the tube beam assembly can rotate around a pin shaft relative to the left bracket assembly and the right bracket assembly, so that a purpose of reducing the terrain clearance of a 'bent S-shaped' part of a tube beam is achieved, and problems that the terrain clearance of the treading is large caused when a maintainer or a cleaner gets on the truck from the front part of the truck by virtue of the front bumper treading mechanism of the truck to clean front windshield glass or maintain other parts, and legs of the maintainer or the cleaner are easily bumped when getting on the truck are solved.

The invention relates to the field of transportation tools, and discloses a 6 * 4 semi-trailer tractor which adopts a first and second axle distance of 3350 mm and a second and third axle distance of1350 mm, a main oil tank is arranged on the left side of a frame, and an integrated post-processing module, a storage battery and an air storage cylinder module are arranged on the right side of the frame. According to the 6 * 4 semi-trailer tractor, the long-distance transportation requirement is met, meanwhile, comfort and safety are higher, and the application range is wider.

The invention provides a method for increasing deformation of a crawler belt bottom plate. The method includes the steps that firstly, a crawler belt is quadrilateral and the height of a bottom plateframe from the ground is small, a travel driving mechanism drives driving wheels to rotate, and crawler belt wheels carry a whole machine to travel on a flat outdoor ground; then, when the crawler belt wheels are required to carry the whole machine on an undulating outdoor ground to travel, a deformed driving mechanism transfers the power to a deformed screw rod and drives the deformed screw rod to rotate. The deformed screw rod rotates to enable deformation sliding blocks to slide close to each other. Push-pull rods pull I-shaped frames which are symmetrically arranged up and down to rotate the I-shaped frames away from each other around first movable shafts, until the two I-shaped frames form a flat angle. A mounting block moves vertically upwards, the bottom plate frame can move synchronously upwards and the height from the ground is increased, and meanwhile a tensioning mechanism supports the crawler belt outwards and enables the crawler belt from quadrilateral to hexagon; and finally, the travel driving mechanism drives the driving wheels to rotate, and the crawler belt wheels can carry the whole machine on the undulating outdoor ground to travel.