215results about How to "Prevent overturning" patented technology

The invention relates to a biomimetic quadruped robot provided with head and tail balance adjustment devices. The biomimetic quadruped robot comprises a trunk, a head balance adjustment device, a tail balance adjustment device and four robot legs, wherein the four robot legs are distributed under the robot trunk, and the head balance adjustment device and the tail balance adjustment device are located on a trunk front portion cross beam and a trunk back portion cross beam. The biomimetic quadruped robot uses a digital steering engine as a driver, and the steering engine can achieve speed and position control and feed back speed, positions, force moment and other information and facilitates on-line observation of a motion state of the robot. Each leg is provided with three driving freedom degrees and one driven extension freedom degree, three-dimensional space motion can be achieved, and the robot can have strong adaptive capacity to complex environments and obstacle crossing ability. The centre-of-gravity position of the robot can be timely adjusted when the robot with the head and tail balance adjustment devices walks in a static state, and the stability of the robot is improved. When the robot is in a unstable state, namely turns over, and reverse rotation force moment is produced by rapidly rotating the head and the tail to prevent the robot from turning over and being restored to be in a balanced state. The biomimetic quadruped robot provided with the head and tail balance adjustment devices is suitable for the multiple fields of military affairs civil cargo transportation, anti-terrorist devices, filed probing, planetary exploration and the like under complex terrain environments.

The invention discloses a three-dimension shock isolation system, the vertical shock isolation bracket structure is: an orienting component is arranged on the parallel shock isolation bracket, a convex shaft is arranged in the orienting component, there has resistance material between the convex shaft and the orienting component, a cover board fixed with the orienting component is arranged on the resistance material, the upper end of the convex extrudes out the orienting component, the lower end matches with the orienting component movably, there has gap between the lower end and the orienting component, a upper connection board is arranged on the disk spring overlapped component, which is fixed with the convex shaft, and matches with the outer surface of the orienting component movably, there has gap between it and the upper end. The overlapping quantity of the disk spring component is at least two, which is covered out of the outer surface of the orienting component, and matches with the orienting component movably. The system can restrain the transmitting of vertical and parallel earthquake wave to the buildings, easy to be adjusted, the lifespan is long, and the performance is stable.

The invention discloses a tableware cleaning line which comprises a top box elevator, an automatic turnover machine, a coarse washing machine, a box body conveyor, a tableware sorting device, tableware conveyor belts, a can turnover device, a cleaning tunnel, a packaging and conveying belt and a tableware assembly device, wherein the discharge end of the top box elevator is close to the feeding end of the automatic turnover machine; an inclined slag remover and a coarse washing machine elevator are arranged in a pond of the coarse washing machine separately; the discharge end of the coarse washing machine elevator is connected with the feeding end of an anti-patterning machine; the out-box end of the automatic turnover machine is provided with the box body conveyor which passes through a box body cleaning room of the cleaning tunnel; the discharge end of the anti-patterning machine is connected with the feeding end of the tableware sorting device; each tableware outlet of the tableware sorting device is correspondingly provided with one tableware conveyor belt separately; and spoons and chopsticks are directly conveyed through the tableware conveyor belts and enter the feeding end of a spoon and chopstick conveyor mesh belt. According to the tableware cleaning line, classifying and cleaning of the tableware are achieved, cleaning is more thorough, and the cleaning efficiency of a table set is greatly improved.

The invention discloses a suspended frequency modulation mass damper, comprising a spring, a mass block and a viscous fluid damper; the mass block is suspended on an upper suspension girder or roof plate through the spring and the viscous fluid damper; the viscous fluid damper mainly comprises a sealed cylinder, a guide rod passing through the cylinder and capable of sliding up and down and a piston fixed on the guide rod; and the damping coefficient of the viscous fluid damper is changed along with the change of the displacement of the viscous fluid damper. The device capable of controlling vertical vibration has simple structure, small occupying area and high space utilization ratio.

The invention relates to a construction device for a cable-stayed bridge, in particular to a bridge floor crane for the cable-stayed bridge. The bridge floor crane for the cable-stayed bridge comprises two sets of main trusses arranged oppositely, a craning system arranged above the main trusses and a walking system arranged below the main trusses, wherein the walking system comprises a main track laid on a mounted steel beam and a walking device in sliding fit with the main track, and an upper layer and lower layer structure is adopted by the main trusses. The bridge floor crane for the cable-stayed bridge further comprises a supporting system arranged on the lower portions of the main trusses, a rear anchoring system arranged on the outer sides of the two sets of the main trusses, a balance weight device and a safety device, the balance weight device and the safety device are arranged at the rear ends of the main trusses, and the supporting system comprises a middle supporting device arranged in the middles of the main trusses and a temporary supporting device arranged at the front ends of the main trusses. Through the adoption of the technical scheme, the bridge floor crane for the cable-stayed bridge has the advantages of being proper in craning height, strong in bearing capacity, good in construction stability, high in construction efficiency and high in safety.

The invention discloses a damping device used for connecting a pile foundation and a bearing platform and a construction method of the damping device. The damping device comprises the pile foundation and the bearing platform, wherein a groove matched with the pile foundation is formed in the bottom of the bearing platform; the top of the pile foundation is connected with an outer sleeve; an inner sleeve is arranged in the groove; the inner sleeve sleeves the outer sleeve; the outer sleeve is connected with the inner sleeve though an elastic connecting part; the outer sleeve, the inner sleeve and the elastic connecting part form a sealed space; and the sealed space is filled with a buffer layer. In the damping device, the elastic connecting part and the buffer layer effectively absorb earthquake energy, buffer the relative displacement between the pile foundation and the bearing platform, effectively prevent a superstructure on the bearing platform from overturn, and protect the joint of the pile foundation and the bearing platform against irreversible damage, including concrete cracking and reinforcement yielding; and after an earthquake is over, a damping connection structure for the pile foundation and the bearing platform resets under the elastic action of the buffer layer and the elastic connecting part so as to achieve the purposes of protecting the superstructure and guaranteeing the completeness of the foundation.

A robot includes a three-dimensional shape detecting sensor to detect a three dimensional shape of a travel surface existing in a forward travelling direction of the robot, a posture stabilizer to stabilize a posture of a body of the robot, a feature data generator to generate feature data of the detected three dimensional shape, an inclination angle prediction generator to generate a prediction value of an inclination angle of the body when the robot is to reach a position on the travel surface in the forward travelling direction at a future time point based on the feature data and a prediction model, and an overturn prevention controller to control the posture stabilizer to prevent an overturn of the robot based on the prediction value.

The invention discloses an unmanned aerial vehicle based on the internet of things. The unmanned aerial vehicle comprises a fuselage, a frame, rotors, an undercarriage, a surveying frame and a mounting plate; bolts of the frame are fixed at the four corners of the fuselage, the rotors are arranged at the four corners on the frame, the top portion of the undercarriage is connected with a lifting electric control push rod, the lifting electric control push rod is arranged at the bottom portion of the frame, the bottom portion of the surveying frame is provided with a storage battery pack, the wall of the mounting plate is provided with a servo motor, and the lower portion of the servo motor is in transmission connection with a surveying probe though a shaft coupling. In the invention, the unmanned aerial vehicle can have an elastic compensation effect on the inclination amplitude of the undercarriage to prevent the undercarriage from be overturned by landed on an uneven ground, and can also rotate the surveying probes with different specifications and models to install and use according to the actual surveying and drawing requirements so as to effectively reduce the assembling operation burden of surveyors and enhance the use flexibility of the unmanned aerial vehicle.

The invention discloses a novel vegetable greenhouse fixing device and relates to the technical field of agriculture. A connection cross rod is fixedly arranged on the bottom sides of the upper ends of each two adjacent supporting frameworks through a connection device, the upper portion of each supporting framework is penetratingly arranged in clamping grooves formed in left and right side wallsof a U-shaped clamp, and each connection cross rod is penetratingly arranged at the bottom of the corresponding clamping groove vertically; a sliding groove is fixedly formed in the inner side wall ofthe U-shaped clamp, sliders are fixedly arranged on two sides of a clamping block and slidably arranged on the inner side of a sliding groove, a gasket is arranged above the clamping block and abutted against the bottom of each connection cross rod, a screw is rotatably arranged in the middle of the bottom side of the gasket through a bearing, the bottom end of the screw rotatably penetrates themiddle of the clamping block through a thread and then is fixedly connected with the middle of a thumb screw, and a plurality of fixing nails are fixedly arranged at the bottom of a base in an equal round corner manner. Stability among frameworks can be improved greatly, a greenhouse can be effectively prevented from being overturned when encountering strong wind, economic loss of a user is reduced, resources are protected, and the novel vegetable greenhouse fixing device is higher in practicability.

This is a construction method for pile reinforcing wall. The wall includes a cement wall composed by grouting piles and a reinforcing wall. The reinforcing wall is made by drilling into stone layer and planting into steel pipes and grouting. The cement wall is connected with the reinforcing wall by steel pipes.

The invention discloses a corn root system growth research device. The device comprises a mist culture box body (1), the whole mist box body (1) is of a cuboid box-shaped structure, a liquid storage tank (2) is arranged inside the mist culture box body, a water pump (3) is installed inside the liquid storage tank (2), and the water outlet end of the water pump (3) is connected to a water guiding pipe (4); several shunt rubber tubes (5) communicated with the water guiding pipe is mounted on the water guiding pipe (4), the end of each shunt rubber tube (5) is docked with a culture frame, and thelower end of the culture frame is fixed at the bottom surface of the liquid storage tank (2). The device has simple structure, and fully satisfies the growth habit and growth cycle of corns, measuredroot system data is more accurate, a growth and cultivation frame with the corns can be automatically adjusted as needed, and the overturning phenomenon caused by gravity centers of corn plants moving upward is prevented.

The invention relates to a universal transportation table supporting arm mechanism for an engine cover. The universal transportation table supporting arm mechanism comprises installation frames, a supporting shaft, limiting block installation seats and limiting blocks. The supporting shaft is installed between the symmetric installation frames. The multiple limiting block installation seats are arranged on the supporting shaft from the part taking end to the part storing end, and the limiting blocks are installed in the limiting block installation seats one by one. The limiting block installation seats are arranged on the supporting shaft in an overturning type sliding and sleeving manner. Multiple pin holes are formed in the part taking end of the supporting shaft. A pin hole is formed in the limiting block installation seat at the part taking end. The limiting block installation seat at the part taking end and the part taking end of the supporting shaft are positioned through a lock pin. The universal transportation table supporting arm mechanism for the engine cover is scientific and reasonable in structural design, adjustability of limiting grooves can be achieved, meanwhile, due to the sequentially positioning type storing and taking operation of side limiting mechanisms, the storing and taking convenience of automobile accessories is greatly improved, universality is high, the use frequency of devices is improved, possible waste losses are reduced, the spare part circulation efficiency is improved, and spare part packaging, logistic cost and the like are optimized.

A kind of cold-storage bottle support with retractable bottle rail, there is a retractable bottle rail installed on the front wall of the bottle support and the rail can slide along the front wall, if bottles put in the bottle support is higher than certain height and need blocking, we can pull the bottle rail upward and adjust the height we pull according to the height of the bottles; If we do not need the bottle rail, we can push it downwards to overlap the front wall, saving the room of the refrigerator.

The invention belongs to the metallurgical field, in particular to an aluminum nickel chrome iron composite alloy for final deoxidization and alloying in steelmaking. The aluminum nickel chrome iron composite alloy solves the problems that a low alloyed steel containing Cr and Ni, alloy steel and steel grades with special use have uneven deoxidation effect, poor yield and complex deoxidation process and are suitable for the smelting need of the steel grade containing Als and nickel chrome. The aluminum nickel chrome iron composite alloy comprises the following compositions in percentage by weight: less than or equal to 0.5 percent of C, less than or equal to 3 percent of Si, less than or equal to 0.05 percent of P, less than or equal to 0.05 percent of S, 1 to 70 percent of Al, 1 to 60 percent of Ni, 1 to 60 percent of Cr and the balance being Fe. The aluminum nickel chrome iron composite alloy has low melting point, large specific gravity, no pulverization and no impurity. The smelting process is convenient to operate; final deoxidization has good deoxidization alloying effect, and the Ni yield is 100 percent; the Cr yield can reach 90 to 95 percent; the smelting yield of the steel grade is 100 percent; and the aluminum nickel chrome iron composite alloy can smelt the steel grade containing Ni and Cr and bring considerable economical benefit for enterprises.

The invention discloses a mounting frame assembly and a window type air conditioner assembly. The mounting frame assembly comprises a support frame, an outdoor support and a connecting piece, whereinthe support frame comprises a support plate and a transverse fixing piece; the transverse fixing piece extends along the length direction of a windowsill; one end of the support plate is connected with the transverse fixing piece, and the other end of the support plate is used for extending out to the outside; the outdoor support is mounted on the support frame and supported on a wall body; and one end of the connecting piece is used for being connected with a window type air conditioner, the other end of the connecting piece is connected with the transverse fixing piece, and the connecting position of the other end of the connecting piece and the transverse fixing piece is adjustable in the length direction of the transverse fixing piece. According to the mounting frame assembly and the window type air conditioner assembly, the support frame and the window type air conditioner are connected through the connecting piece, and the window type air conditioner not only can be prevented from being lifted upwards to the outside, but also can be prevented from being pressed downwards and dumped indoors, so that the mounting stability of the window type air conditioner is improved.

The invention relates to a floating tray on a water floating field, comprising a bucket-shaped floating tray (1), the bottom end of the floating tray (1) is provided with a root downward hole (3), theupper part of the floating tray (1) is provided with a water inlet and outlet hole (7), the floating tray (1) is inserted in a floating tray sleeve (2), the height of the floating tray sleeve (2) islower than the height of the water inlet and outlet hole (7), and the bottom part of the floating tray (1) is provided with a hole (8) which is matched with the root downward hole (3) at the bottom end of the floating tray (1). The invention realizes to plant crops on water surface, thereby having the function of increasing the planting area of the crops and increasing grain output; meanwhile, thefloating tray can be floated on water for a long time, a great quantity of water needed by growth of water-loving crops can be supplied without irrigation, thereby saving manpower and material resource needed in the irrigation.

The invention relates to the field of robots, and particularly discloses a flexible connection member and a robot foot structure using the same. The flexible connection member includes a central shaft and rigid joints; a fixing joint is arranged between every two rigid joints; the central shaft successively passes through the rigid joints and the fixing joints and is connected to the fixing joints; each fixing joint includes a sleeve and blades, and a connection space is formed between every two blades; bosses corresponding to shapes of the connection spaces are arranged on one ends, contacting with the fixing joints, of the rigid joints; the bosses of the two adjacent rigid joints are inserted into the adjacent connection spaces alternatively; each rigid joint includes end joints and a central joint, connection holes are formed in one ends, away from the bosses, of the end joints, and a connection gap is formed in an outer surface of the central joint. The flexible connection member can connect four soles forming a foot portion of the robot, and can overcome the problem that the robot will turn over when the soles of the robot are inclined to a ground surface in a random direction.

The invention discloses a three-dimension shock isolation system, the vertical shock isolation bracket structure is: an orienting component is arranged on the parallel shock isolation bracket, a convex shaft is arranged in the orienting component, there has resistance material between the convex shaft and the orienting component, a cover board fixed with the orienting component is arranged on the resistance material, the upper end of the convex extrudes out the orienting component, the lower end matches with the orienting component movably, there has gap between the lower end and the orienting component, a upper connection board is arranged on the disk spring overlapped component, which is fixed with the convex shaft, and matches with the outer surface of the orienting component movably, there has gap between it and the upper end. The overlapping quantity of the disk spring component is at least two, which is covered out of the outer surface of the orienting component, and matches with the orienting component movably. The system can restrain the transmitting of vertical and parallel earthquake wave to the buildings, easy to be adjusted, the lifespan is long, and the performance is stable.

The invention discloses a bridge swivel system and a mounting and swivel method thereof. A swivel device comprises an upper turntable arranged at the bottom of a bridge pier, an upper spherical hinge and a supporting leg which are arranged at the bottom of the upper turntable, a lower turntable and a slideway which are pre-buried at the top of a bearing platform, a lower spherical hinge arranged at the top of the lower turntable, and a positioning shaft arranged at the center of the lower spherical hinge; the upper spherical hinge and the lower spherical hinge serve as main supports and are in close fit, a sliding piece is arranged between the upper spherical hinge and the lower spherical hinge, and the upper rotary disc and the upper spherical hinge are positioned through a positioning shaft. The supporting leg and the slideway serve as assisted supports and are in sliding fit. The traction device comprises an anchor bearing and a prestress channel which are pre-buried on the upper turntable, a steel strand of which one end penetrates through the prestress channel and is connected with the anchor bearing, traction jacks connected with the other end of the steel strand, and a traction counter-force seat, a boosting counter-force seat and a limiting structure which are arranged at the top of the bearing platform; and the two groups of traction jacks and steel strands are reversely arranged on two sides of the upper turntable and can be controlled to be synchronous. The system is stable and safe in rotation, high in efficiency and capable of crossing two railway lines.

The invention discloses a windproof support for a greenhouse. The support comprises two first piston tubes which are parallel and horizontally fixed on the ground, two ends of each first piston tube are sealed, the end parts of the two first piston tubes are connected through connection rods to form a square frame shape in a surrounding manner, the middle part of each first piston tube is vertically and fixedly connected with one second piston tube, and each second piston tube communicates with one corresponding first piston tube; the interior of each first piston tube is movably connected with two first pistons, and two first pistons are symmetrically distributed on two sides of one corresponding second piston tube; and the interior of each second piston tube is movably connected with onesecond piston, the space formed by each second piston and two corresponding first pistons is filled with hydraulic oil, and one end, far away from the hydraulic oil, of each first piston is fixedly connected with one piston rod. According to the support disclosed by the invention, acting force of strong wind is utilized in the strong-wind weather, a height of the greenhouse is reduced, blockage of the wind by the greenhouse is reduced, and therefore damage of the strong wind to the greenhouse is effectively reduced.

The invention discloses ultra-large combined fire-fighting equipment special for a super high-rise building. The ultra-large combined fire-fighting equipment special for the super high-rise building comprises a moving carrier and a control mechanism which is in signal interconnection with a lifting mechanism and a supporting mechanism which are arranged on the moving carrier. The lifting mechanism is disposed on the upper portion of the moving carrier, the supporting mechanism is mounted on the circumferential side of the moving carrier, and a balance module is disposed on the upper portion of the lifting mechanism. The ultra-large combined fire-fighting equipment is combined with a fire fighting apparatus, the range of a fire fighting truck or other fire fighting apparatuses can be broadened, and moreover the influence of a base plane on the fire fighting truck or the other fire fighting apparatuses can be reduced by means of the ultra-large combined fire-fighting equipment, so that the ultra-large combined fire-fighting equipment special for the super high-rise building is more suitable for fire-fighting work of the super high-rise building.

An in-line measuring method for the structural displacement of tower crane includes such steps as arranging an angle sensor at the pivoted root of gibbet, detecting the angle variation of gibbet, A / D conversion to become digital signal, inputting the digital signal to single-chip processor, and processing by mathematic model to obtain the structural displacement.

The invention discloses an atmospheric environment parameter monitoring method. The method comprises the steps of grid division, point distribution, monitoring processing and pollution source tracing.A lifting platform is matched with a driving mechanism for use, wherein the height of a monitoring probe can be adjusted according to practical requirements so as to monitor the atmosphere at different heights. The driving mechanism is matched with a protection module for use; when the wind speed is higher than the triggering threshold value; start driving mechanism, the lifting platform descendsto the lowest end; the height of the monitoring station is automatically reduced; the monitoring station is prevented from turning over due to overhigh wind speed; improving stability of a device, two adjacent monitoring stations are associated; establishing associated groups, presetting a phase difference threshold, by comparing the difference monitored by the associated groups in real time withthe difference threshold, when the pollution source occurs in the monitoring area, the abnormal associated groups are recorded, and the plurality of abnormal groups are connected, so that the pollution source area can be positioned and obtained, an administrator can lock the pollution source at the first time and quickly find the pollution source, and the working efficiency is improved.

The invention relates to a molten iron filtering apparatus for casting. The apparatus comprises a ceramic filter seat, the ceramic filter seat is provided with an inlet end, an outlet end and an inner cavity pipeline, a filter screen is obliquely arranged in the inner cavity pipeline of the ceramic filtering seat at an angle of 30-60DEG to the horizontal, the inner wall of the inner cavity pipeline is provided with an inner step for fixing the filter screen, the internal opening of the inlet end is rectangular, the internal opening of the outlet end is circular, and the caliber dimension of the internal opening of the inlet end of the ceramic filter seat is greater than the dimension of the maximum outer rim of the filter screen in order to conveniently put the filter screen in the inner cavity pipeline of the ceramic filter seat from the internal opening of the inlet end. The filter screen is obliquely arranged in the filter seat at a certain angle, so the internal space of a casting system is effectively utilized; and when molten iron flows through the ceramic filter seat, the obliquely arranged filter screen improves the filtering area, light molten slag and impurities in the molten iron upward float in the upper portion space of the filter screen, and the lower portion filter screen still can filter the molten iron to realizes the slag prevention effect of the filter screen.

The invention discloses a connecting piece, an installing frame assembly and a window type air conditioner assembly. The connecting piece comprises a first connecting part and a second connecting partconnected with the first connecting part. The second connecting part is used for being connected to the installing frame assembly. The first connecting part extends in the direction of the indoor side along the outdoor side of a window type air conditioner, and the first connecting part is used for being connected to the window type air conditioner. Accordingly, the connecting piece connects a supporting frame and the window type air conditioner, upward overturning of the window type air conditioner out of a room can be prevented, downward pressing and toppling of the window type air conditioner into the room can be prevented as well, and accordingly installing stability of the window type air conditioner can be improved.

The invention discloses a waterborne building used for entertainment, or leisure or residence. The waterborne building comprises an action center unit, a traffic stop unit, main streets, auxiliary streets and floating houses, the action center unit and the floating houses are connected through the main streets and / or the auxiliary streets to ensure that people can walk smoothly, the main streets and the auxiliary streets are formed by hinging floating bridges and are connected into a whole so that the waterborne building can have good stability and capacity for resisting stormy waves, and entertainment, or leisure or residence safety of people is ensured.

The invention discloses a transfer trolley used for stacking and destacking of bagged materials. The transfer trolley used for stacking and destacking of the bagged materials comprises a trolley frame, a fork plate, a trolley wheel connecting rod and two trolley wheels, wherein the two trolley wheels are connected through a wheel shaft, the lower end of the trolley frame is connected with one end of the fork plate in a rotating mode through a fork plate rotary pin, one end of the trolley wheel connecting rod is connected with the lower end of the trolley frame in a rotating mode through a connecting rod rotary pin, the other end of the trolley wheel connecting rod is connected with the wheel shaft in a rotating mode, the fork plate rotary pin and the connecting rod rotary pin are both parallel to the wheel shaft, the trolley frame is provided with an overturning loading station and a transportation station, the included angle between the overturning loading station and the fork plate is an acute angle, the included angle between the transportation station and the fork plate is 90 degrees, a first limiting and stopping structure and a second limiting and stopping structure are arranged between the trolley frame and the fork plate, the first limiting and stopping structure is used for enabling the trolley frame to rotate anticlockwise with the fork plate rotary pin as the axis to be positioned at the overturning loading station, and the second limiting and stopping structure is used for enabling the trolley frame to rotate clockwise with the fork plate rotary pin as the axis to be positioned at the transportation station. The transfer trolley used for stacking and destacking of the bagged materials has the advantages that the problem that a vehicle frame of an ordinary transportation vehicle can tip forwards easily during unloading, using is convenient and flexible, operation is safe, workload can be relived, and production efficiency is improved.

The invention discloses an overbank flow foundation self-collapse dam geotextile emergency flood bypass, and belongs to the field of hydraulic engineering of emergency spillway projects and national defense of dams dealing with water attacks. The emergency flood bypass mainly comprises an overbank flow foundation self-collapse dam designed according to an overbank flow foundation self-collapse damdisaster prevention and damage reduction design theory. The overbank flow foundation self-collapse dam (1) comprises overbank flow foundation secondary self-collapse dams and overbank flow foundationwater guiding and pollutant flushing self-collapse dams. Protective surfaces of geotextile of the geotextile emergency flood bypass (2) comprise the geotextile scale-shaped protective surface (II-a),the geotextile belt passing scale-free protective surface (II-b), the concrete plate armour geotextile belt passing scale-free protective surface (II-c), the chemical fiber rope net loose-stone armour geotextile belt passing scale protective surface (II-d) and the L-shaped geotextile belt passing geotextile scale-shaped protective surface (II-e). The emergency flood bypass is suitable for a reservoir auxiliary dam, a main dam, a high dam and a high ditch head barrage, capable of achieving controllable and automatic emergency flood diversion, simple in structure, convenient to implement, low in manufacturing cost, safe, reliable and free of permanent land occupation.

The invention provides a forwards-folded rollover prevention electric wheelchair, which comprises a wheelchair frame, armrest devices, a locking component, a storage bag and a rollover prevention frame, wherein the wheelchair frame comprises an upper backrest, a lower backrest, a seat frame, a front frame and a rear frame; each armrest device comprises an armrest tube, an armrest support block and an armrest support tube; the storage bag is arranged below the seat frame; the rollover prevention frame comprises a rollover prevention frame body and auxiliary rollers are arranged on the two sides of the rollover prevention frame body; a front hinge hole of the rollover prevention frame body is connected with a lower hinge hole of the lower backrest to form a first linkage structure; when the electric wheelchair is folded, the rollover prevention frame is forwards folded. The electric wheelchair is high in safety and convenient to use; the rollover prevention frame is arranged to prevent the electric wheelchair from rollover, and can be linked along with the folding of the electric wheelchair, so that the electric wheelchair is conveniently folded and used; in addition, the forwards-folded rollover prevention electric wheelchair is further provided with the storage bag, so that functions of the electric wheelchair are effectively expanded.