143results about How to "Reduce the weight of the whole machine" patented technology

Devices and methods for manufacturing displays, solar panels and other devices using larger size workpieces are provided. The workpiece is rolled into a cylinder, thereby reducing the physical size by a factor of 3 in one dimension. The stages on which the workpieces are rolled have a cylindrical shape, which allows a more robust and / or compact movement of the glass, reduced machine weight. The workpieces are relatively thin, more flexible, and are rolled onto a cylinder with a diameter of about 1 meter.

The invention discloses a method for killing soil bacteria and insects and improving soil and a special device for killing bacteria and insects, wherein the method for killing soil bacteria and insects and improving soil comprises the following steps: first, rotatably plowing the surface soil, where the rotary plowing depth is not less than 35 cm; second, shoveling the surface soil from the land, and lifting the shoveled surface soil and then baking the surface soil by flame; and third, complementing microorganism, compost and trace element; the special device comprises a box, wherein a shoveling plate is arranged in the front of the box body; a soil inlet is arranged on the front wall of the box body; a transmission shaft is arranged above the back of the shoveling plate; soil-lifting blades are distributed on the transmission shaft annularly; a first tilting plate is arranged on the middle lower part of the box body; a gas pipe is arranged at the top of the box body; and a flame stove is arranged on the box body. When the special device and the method disclosed by the invention are used for killing bacteria and insects, the cost is low, the insect-killing effect is good and the organic activity and microorganism activity in the soil are ensured.

The invention relates to a pump unit applied to a high-pressure cleaning machine. The pump unit comprises water inlet chambers, water outlet chambers and a central chamber, wherein the central chamber communicates with the water inlet chambers and the water outlet chambers. The pump unit further comprises a plunger and an eccentric mechanism, wherein the plunger is arranged in the central chamber, and the eccentric mechanism is connected with the plunger; and the plunger is driven by the eccentric mechanism to perform reciprocating motion in the central chamber.

The present invention relates to an orbit type gantry crane, comprising a crossbeam, an outrigger, a saddle beam, a hoisting mechanism and an orbit hanging trolley. The hosting mechanism is installed at the saddle beam. A steel wire led out by the hoisting mechanism is connected with a pulley at an orbit hanging crane hanging tool through a relevant pulley group. The hoisting mechanism is not installed at the trolley but is installed at the saddle beam at the lower part of the outrigger, thus the trolley has simple structure and greatly reduced weight, and the manufacturing technology of the trolley is simplified greatly; at the same time, because the installation position of the hoisting mechanism is placed at the saddle beam which is close to the ground, the hoisting mechanism is very convenient for maintaining; in addition, a novel single beam structure is adopted to the crossbeam, and a double-beam structure in the prior art is not adopted, so the whole crane weight is reduced greatly at the same time, and the borne pressure of the wheels of the crane is reduced greatly.

A rotary-tillage, mulching and earthing machine comprises a frame, a rotary tiller, a shaping and compacting roller, a film suspension and a soil splitting board, wherein the rotary tiller is mounted below the front of the frame, the shaping and compacting roller is mounted at the rear of the rotary tiller, the film suspension is mounted below the rear of the frame, the soil splitting board is arranged above the film suspension, the rotary tiller is provided with a rotary blade shaft, and spoon-shaped rotary blades are disposed on the rotary blade shaft. When the rotary-tillage, mulching and earthing machine is operated, the rotary tiller crushes soil, and the spoon-shaped rotary blades take up the crushed soil. When the rotary blades rotate to a certain height, the soil in the spoon-shaped rotary blades is cast over the shaping and compacting roller to spikes welded on the sol splitting board and is crashed onto the spikes, and the soil is then evenly scattered to the surface of a mulching film spread on the film suspension, so that operations of rotary tillage, mulching and earthing are realized. A soil conveying mechanism between the rotary tiller and the soil splitting board of the machine is omitted, so that the longitudinal size and the overall weight of the rotary-tillage, mulching and earthing machine are reduced, and the problem that the rotary-tillage, mulching and earthing machine cannot be suspended to the rear of the mini-tiller due to the small rear space of the mini-tiller is solved.

The invention belongs to the field of robot design, and particularly relates to a bionic soft mechanical arm and a grasping system. The bionic soft mechanical arm comprises at least two parallel corrugated pipes, two end plates and a supporting plate; the two end plates are located on two ends of at least two corrugated pipes, the end of each corrugated pipe is fixedly connected to the end plate on the corresponding end, the supporting plate is located between at least two corrugated pipes, and the supporting plate is arranged on the minimum diameter position of each pipe body. According to the bionic soft mechanical arm and the grasping system, control is convenient, the air pressure in an air cavity in each corrugated pipe only needs to be changed, and the postures of the bionic soft mechanical arm and the grasping system can be changed.

The present invention relates to a large-scale dual-rotor direct-drive permanent magnet wind power generator and a generating set thereof. The generator includes a stator and a rotor. The rotor is a dual-rotor structure including an outer rotor and an inner rotor; the stator is mainly composed of stator iron Core, outer ring group and inner ring group, the inner and outer ring groups correspond to the in-phase windings in anti-phase series; the stator is located between the outer rotor and the inner rotor, the outer rotor and the stator form the first working air gap, and the inner rotor and the stator form the second Two working air gaps, the first working air gap is connected in series with the second working air gap magnetic circuit. The generator set also includes a hub, a main shaft, a rotor turntable, a casing and a frame, and the stator is fixed inside the casing; the inner and outer rotors are connected and synchronized with the main shaft and the hub through the rotor turntable. The invention adopts a double-rotor ring winding structure, which greatly improves the torque power density of the motor, makes full use of the internal space of the motor, reduces the volume and weight of the motor, reduces the production cost, and facilitates transportation.

The invention relates to an efficient flux barrier motor based on the hybrid cooling technology. The efficient flux barrier motor comprises an enclosure, and a stator assembly and a rotor assembly, which are arranged in the enclosure, wherein the enclosure comprises a motor inner shell and a motor outer shell, a cooling liquid passage is formed between the motor inner shell and the motor outer shell, the motor outer shell is provided with a liquid inlet and a liquid outlet, both of the liquid inlet and the liquid outlet communicate with the cooling liquid passage, the stator assembly comprisesa stator, stator teeth formed in the stator and a winding wound in the stator teeth, the efficient flux barrier motor further comprises a heat pipe installed in the stator assembly, the heat pipe hasan evaporation section and a condensation section, the efficient flux barrier motor further comprises a plurality of flux barrier grooves, the flux barrier grooves extend from an outer wall of the stator into the stator teeth, the plurality of flux barrier grooves are arranged along the circumferential direction of the stator, the heat pipe is a heat pipe made of a non-permeability magnetic material, the evaporation section is installed in the flux barrier grooves, and the condensation section is arranged in the cooling liquid passage. The efficient flux barrier motor provided by the invention has the advantages of fast heat dissipation rate and can improve the motor efficiency.

The invention discloses a multilayer micro bionics flapping aerocraft, and belongs to the field of mechanical design. The multilayer micro bionics flapping aerocraft comprises double-layer double-crank rocker mechanisms, a driving mechanism and a flexible wing mechanism. The driving mechanism produces driving force and transmits the driving force to the double-layer double-crank rocker mechanisms.The double-layer double-crank rocker mechanisms produce corresponding flapping trajectories and overturn actively to drive the flexible wing mechanism connected with the double-layer double-crank rocker mechanisms, so that the function of simultaneously conducting of flapping and turnover movement is achieved. By setting parameters such as the lengths of rockers, the lengths of cranks and the lengths of connecting rods on the upper and lower layers of mechanisms, the phase difference between the two layers of double-crank rocker mechanisms during moving is changed, so that flexible wings rotate to produce the angle of attack while the flexible wings flap; meanwhile, the flexible wings produce large deformation to form passive overturning, so that it is ensured that a large lift force is produced. The multilayer micro bionics flapping aerocraft has the functions of simultaneously achieving flapping and twisting the wings and the like, and has the characteristics of being compact in structure, small and exquisite in size, very low in mass, flexible in mechanism and the like.

The invention discloses a multi-juxtaposed double cantilever girder-erecting machine and a grinder electing and hole penetrating method thereof. A front hoist overhead crane and a rear hoist overheadcrane are arranged on the upper face of a main truss, and slide back and forth on a rail of the main beam in the construction direction of the main truss; a horizontal movement mechanism is arranged on the upper parts of both front and rear hoist overhead cranes, so the horizontal movement of a hanging beam is achieved and synchronous multi-erection is completed; four sets of legs are arrange below the main truss and are front-rear successively front auxiliary legs, front legs, middle legs and rear legs; the front auxiliary legs are arranged at the top end, the four sets of legs can move forwards and backwards in the construction direction, the horizontal movement mechanism is arranged on the upper part of the front and middle legs, so the horizontal movement upper from the main truss is achieved and synchronous multi-erection is completed. According to the multi-juxtaposed double cantilever girder-erecting machine and the grinder electing and hole penetrating method thereof, when satisfying beam erection in a large scale and hole penetrating, multi-juxtaposed bridges can be erected synchronously, hole penetrating bending moment is reduced, and the weight of the whole machine is lightened.

The invention relates to a continuous wall forming machine of an underground cement soil impermeable wall. A machine chassis and a hydraulic support form a walking travel mechanism, a frame and an oblique adjusting rod are arranged on the machine chassis, the frame is adjusted to be in a perpendicular or oblique position through the oblique adjusting rod, and a vertical guide rod and a horizontal drive cylinder are arranged on the frame. A cutter drive mechanism and a cutter combination box are connected with a cutter combination chain and a cutter head, and move up and down along the vertical guide rod through a vertical drive cylinder. The cutter combination chain surrounding the two sides of the cutter combination box moves around a position between the cutter drive mechanism and the cutter head. Soil layers are cut and agitated by blades fixed on the cutter combination chain. A non-fence impermeable wall having excellent impermeable effect is really built through the machine, and the continuous impermeable wall has the advantages of uniform texture, accurate advance direction, better impermeable effect and simple technology. The continuous wall forming machine can be used for digging downwards, cutting soil layers and building the cement soil wall in one step.

The invention relates to a pump unit applied to a high-pressure washer. The pump unit comprises a water inlet cavity, a water outlet cavity, and a central cavity communicating with the water inlet cavity and the water outlet cavity; and the pump unit further comprises a plunger disposed in the central cavity and an eccentric mechanism connecting with the plunger, and the eccentric mechanism drivesthe plunger to reciprocate in the central cavity.

The invention relates to the field of construction of petroleum and gas pipelines, and discloses a vertical hydraulic pipe cold-bending machine in order to solve the technical problems in the prior art that as the diameter of a steel pipe increases, the size and weight of a pipe cold-bending machine need to be increased obviously. The vertical hydraulic pipe cold-bending machine comprises a machine body assembly, a lower tire assembly, an inclined block device, an inclined block oil cylinder, a wedge-shaped mechanism, a main push oil cylinder device and a lifting oil cylinder device. The lower tire assembly is arranged on a second side of the machine body assembly, and a first side is opposite to the second side. The inclined block device comprises an inclined block and a sliding block, and the sliding block is connected to a front wire assembly. The inclined block oil cylinder is connected with the inclined block device. The wedge-shaped mechanism is arranged at the bottom of the lower tire assembly and connected with the lower tire assembly. One end of the main push oil cylinder device is connected with a bottom plate, and the other end of the main push oil cylinder device is connected with the wedge-shaped mechanism. One side of the lifting oil cylinder device is arranged on the machine body assembly, and the other side of the lifting oil cylinder is connected with the lower tire assembly and used for supporting and lifting the lower tire assembly. The technical effect that even though the bending radius is increased, the size and weight of the pipe cold-bending machine are not increased too much is realized.

The invention relates to a method and a device for lifting weights on the top floor of a super high-rise building, wherein the device comprises a stand, a fixed mast, a movable mast, a ball joint, a guy cable combined disk, a hoisting block, an amplitude-change block, a stabilizing bar, a guy cable and a prestressed drag line; the stabilizing bar, the stand, the guy cable combined disk and the fixed mast are utilized to form a stable support structure, and meanwhile, prestressing force applies to the guy cable and the prestressed drag line; when weights are lifted, the stabilizing bar is in a state with small stress or no stress and generates sufficient stability and safeguard; and a guideline resists transverse wind loads. The invention has a simple process method, and the device has reasonable structure, simple and convenient operation, small overall weight, flexible movement, convenient assembly, disassembly, entrance and exit, safe operation, low cost and short construction period, and can realize the integral lifting of overweight objects on the top floor of the super high-rise building, overcome the difficulty of the integral lifting of the overweight objects on the top floor of the super high-rise building which can not be finished by traditional construction elevators, tower cranes and traveling cranes, solve the difficult problem puzzling the technical field of construction and installation for a long time, and realize standardized and mass large-scale production.

The invention discloses an aerial charging method of a flight device, and relates to the field of wireless charging of an unmanned aerial vehicle. The method comprises the following steps of acquiring a first flight route, wherein the first flight route comprises a plurality of wireless charging nodes; controlling the flight device to fly on the first flight route; and sending a command requesting for wireless charging to the wireless charging nodes and / or a server. Besides, the invention also discloses an aerial charging device and system of the flight device. According to the aerial charging device and system of the flight device disclosed by the invention, the flight device flies on the first flight route including the wireless charging nodes to realize flying while charging, so that the cruising ability of the flight device is effectively improved; and besides, a smaller battery can be selected for the flight device, so that the weight of the complete flight device is reduced and flight energy consumption is reduced.

The invention relates to a unit-type dual-band infrared detection assembly suitable for a low-temperature environment. The unit-type dual-band infrared detection assembly mainly serves as a photovoltaic conversion sensor at the front end of a signal chain, and is especially suitable for the analysis and application field of broadband infrared spectrum under the low-temperature environment, wherein the low-temperature environment is an environment, where the temperature is lower than 80 K, preferably, 60 K-80 K; and the broadband, in the example, is 2.5-13.3 [mu]m infrared wavelength. A Dewar cavity is utilized to enable a color separation film to be packaged with two types of unit-type detectors, thereby effectively solving the problem of broadband coverage hard to be realized by single type of detector Dewar package; the detection assembly can combine a refrigerating machine to realize work under the low-temperature environment; and a pre-amplification circuit is integrated in the assembly in the form of a chip module, so that system noise can be further suppressed, and a voltage signal can be output directly.

The invention discloses a logistics unmanned aerial vehicle container. A logistics unmanned aerial vehicle is provided with a flight control system. The logistics unmanned aerial vehicle container comprises a container main body, a control area, a storage area, a container door, a mounting area and a control module; the control area is provided with air inlets and air outlets and located at the front end of the container main body, the storage area is located on the inner side of the middle of the container main body, the container door is located at the rear end of the container main body, and the mounting area is located at the top end of the container main body; and the front end of the control area is triangular, a plurality of edges for landing and taking off of the logistics unmannedaerial vehicle protrude downwards from the bottom of the container main body, and a plurality of mounting bodies for being hung on the logistics unmanned aerial vehicle are arranged at the top of thecontainer main body. The logistics unmanned aerial vehicle container can control an aircraft and can adapt to any unmanned aerial vehicle with the flight control system; the overall weight of the unmanned aerial vehicle can be reduced, and the container can adapt to various vehicle models; and the logistics unmanned aerial vehicle container can accurately locate the landing point when the unmanned aerial vehicle lands, so that the operation efficiency is improved.

The invention discloses a rope rescue robot and relates to the field of rescue equipment. The rope rescue robot comprises a square main body box and a semicircular side box. A battery, a hoisting mechanism, a remote control circuit board and an illuminating lamp are installed in the square main body box. A driving wheel groove motor is installed in the semicircular side box. According the innovation points, the two sides of the square main body box in the rope direction are each provided with an armrest; a manual speed adjusting rotary handle is installed on the armrest of one side, is electrically connected with the remote control circuit board and is used for controlling advancing and retreating speeds of the rescue robot and the rising and falling speeds of the hoisting mechanism; and the semicircular side box is provided with a rope guide mechanism for vertical climbing of the rope rescue robot. The rope rescue robot is provided with the manual speed adjusting rotary handle and therope guide mechanism, thus a rescuer can manually or remotely control the operation directions (rising, falling, advancing and retreating) and the operation speed of the robot. Rope rescue efficiencyis improved, and the rope rescue robot is more suitable for disaster accident rescue in gorges, mountains, riverways, high-rise buildings and the like.

The invention discloses a wide-body steel girder erecting machine and a girder erecting method thereof, and relates to the technical field of bridge engineering construction, comprising: a main structure, which includes two oppositely arranged main girders, and the two ends of the two main girders are fixed There is a main beam connecting two main beams; a supporting mechanism, which includes front outriggers, middle outriggers and rear outriggers fixed on the two main beams, and the front outriggers, middle outriggers and rear outriggers are all set There are telescopic devices, which can extend and contract the front outriggers, middle outriggers and rear outriggers; and hoisting devices, which include a crane and a spreader. The spreader is set under the crane, and the crane can be retracted and retracted. The spreader is lowered, and the crane can also move longitudinally and laterally along the bridge. The present invention can realize the efficient, stable and safe erection of wide-body steel girders under the working conditions of existing bridge support space, limited foundation bearing capacity and inability to use large-scale equipment.

The present invention discloses a multi-stator rotor structure axial direction permanent magnet brushless traction machine, and relates to the elevator device technology field. The machine comprises a spindle, a plurality of rotor modules fixedly arranged on the spindle and a stator, the stator is arranged between two adjacent rotor modules and there is a gap between the stator and the rotor modules, the stator is a printed circuit board module, the printed circuit board is provided with a plurality of coil sets, the coil sets comprise a 3-phase winding unit, the coiling unit are connected with and connected in series with wires arranged at the inner ring and the outer ring of an internal connection layer of the printed circuit board to form a winding loop, and one end of the 3-phase winding unit is connected in the internal connection layer of the printed circuit board to form neutral points. Through adoption of the structural design, the printed circuit board replaces a traditional metal wire winding to allow the structure of the traction machine to be simpler, effectively reduce the quality of the whole machine, improve the reliability of the work of the traction machine and reduce the elevator load.

The invention discloses a grass trimmer. The grass trimmer comprises an extension rod which extends longwise, a machine head for executing work, and a handle assembly for an operator to operate, wherein the extension rod is provided with a first end and a second end opposite to the first end in the lengthwise direction; the machine head is connected with the first end of the extension rod; the handle assembly comprises a first handle and a second handle which are connected to the second end of the extension rod; the second handle comprises at least one operating position; the at least one operating position comprises a first position in which the second handle is arranged so as to provide a leaning support for the arm or elbow of the operator; the second handle in the first position is matched with the first handle to implement one-hand operation; and the grass trimmer has a trimming state and a pruning state under one-hand operation conditions. The machine head is arranged in a way that the machine head can rotate by a preset angle relative to the extension rod in the radial direction of the extension rod, thereby implementing the switching between the pruning state and trimming state of the machine head.

The invention provides an ultra-low-temperature storage box which comprises a box shell, an inner container and a door assembly. The inner container is arranged in the box shell. The door assembly comprises a door shell and a lining. Heat preservation layer structures are arranged between the door shell and the lining and between the box shell and the inner container respectively. The heat preservation layer structures are formed by compounding foam heat insulation boards, vacuum heat insulation boards and foam heat preservation materials. Each ultra-low-temperature heat preservation layer structure with at least three layers of heat insulation heat preservation materials is adopted in the storage box, the thickness of each insulation layer is reduced, the mass of a product is decreased, the heat preservation effect is improved, and meanwhile, the vacuum heat insulation boards are protected.

The invention belongs to the field of twin-well oil pumping machine in the oil extraction machinery, and in particular relates to a rotary base arm crank bidirectional balancing twin-well pumping machine. The main technical proposal is as follows: a rotary base is provided so as to make the twin-well oil pumping machine rotate 180 degrees, thereby enabling two ends of the twin-well pumping machine to interchange, and making a well far away from a crank carry out workover operation and a well near the crank continue to work. An arm with a rotating wheel is arranged on one end of the oil pumping machine close to the crank. When the two wells are far away from each other, the arm can be extended to make the suspension point of the pumping machine aligned with the wells so as to adjust the distance of the suspension point of the pumping machine. During the workover, the arm is taken back, and the well on the other side continues to work.

The invention relates to an electric power inspection robot control system and method based on a wide-narrow heterogeneous communication technology, and belongs to the technical field of electric power inspection robots. The system comprises a visible light camera, an infrared thermal imager, an equipment noise pickup module, a light supplementing lamp, a holder, a laser navigation positioning module, a motor driving module and a driving motor, The motor driving module is connected with the driving motor and used for controlling the driving motor to work. The system also comprises a main controller, a low-power consumption controller, a high-speed broadband network communication module and a low-power consumption narrowband network communication module. According to the invention, the high-speed broadband network and the low-power-consumption narrow-band network have wide and narrow heterogeneity; the low-power-consumption control of the inspection robot is realized by matching with the corresponding main controller and the low-power-consumption controller, so that the power consumption of the inspection robot in a standby and inspection movement intermittent period can be effectively reduced, the effective endurance mileage of a battery is prolonged, the requirement on the battery capacity is reduced, and the overall weight of the inspection robot is further reduced, so that the transportation and maintenance are facilitated.

The invention discloses a tillage tool for implementing moisture and fertilizer retention performance of a shallow tillage layer and belongs to the technical field of agricultural machinery. The tillage tool comprises a beam frame, a suspension frame, a transmission mechanism, a groundbreaking mechanism, a discharge mechanism, an earthing mechanism and a suppressing mechanism; the beam frame is connected with a tractor through the suspension frame; the output power of the tractor is connected with the groundbreaking mechanism and the discharge mechanism respectively through the transmission mechanism, the groundbreaking mechanism is formed by arranging a large groundbreaking cutter head on a rotating shaft, the large groundbreaking cuter head corresponds to the position of a seedling strip, an earthing shovel of the earthing mechanism and a discharge shovel of the discharge mechanism are in one-to-one correspondence with the large groundbreaking cutter head, a digging groove is formed through soil broken by the large groundbreaking cutter head, the discharge shovel is used for ditching and discharging materials, and the earthing shovel is used for earthing to have fertilizer buried underground. By the arrangement, the fertilizer can be discharged underground to be mixed with the soil to form the shallow tillage layer, the purposes of moisture and fertilizer retention and establishment of the shallow tillage layer are realized, and the soil is prevented from desertification and salinization.

The invention discloses a control cabin modified gear of an engineering machine. The control cabin modified gear comprises a control cabin body (1), a rotary rack (4) which is in revolving connection with a rotary table of the engineering machine, a telescopic component (3), a first rod (2) and a limiting mechanism, wherein the telescopic component (3) is used for supporting the control cabin body (1) and driving the control cabin body (1) to move up and down; the two ends of the first rod (2) are hinged between the rotary rack (4) and the control cabin body (1); the limiting mechanism is arranged at a preset position and is used for limiting the rotation of the first rod (2); and under the action of the telescopic component (3), the control cabin body (1) rotates around the hinge point of the control cabin body (1) and the first rod (2) in a vertical plane. The control cabin modified gear disclosed by the invention is simple in structure and is favorable for lightening the weight of a complete machine; and two operations, namely pitching and fluctuating, are completed by only one telescopic component, thus the arrangement of a hydraulic system and an electrical system of the engineering machine can be favorably simplified, and simultaneously, the use cost of the engineering machine can be lowered. The invention also provides the engineering machine comprising the control cabin modified gear.

The invention discloses an actuating mechanism of a variable valve stroke drive device for an engine. The actuating mechanism comprise a driving part and a driven part, wherein the driving part comprises a driving shaft and a driving gear sleeved on the driving shaft, the driven part comprises a driven shaft and a pivotal axis. The driven shaft is connected with the pivotal axis, any two of the driving shaft, the driven shaft and the pivotal axis are mutually paralleled, the driven shaft is fixed on a cylinder cover of the engine in a rotating shaft, and the driven shaft is provided with a driven gear meshed with the driving gear. The actuating mechanism is compact in structure, the arrangement of the cylinder cover is convenient, meanwhile, the whole weight of the actuating mechanism is light, the whole weight of the engine is effectively reduced, and therefore fuel oil consumption can be reduced to a certain degree. In addition, gear transmission is simple and reliable, stability and durability are good, failure rates of the actuating mechanism are decreased, the whole service life of the actuating mechanism can be prolonged, and use cost can be reduced.

A movable palletizing robot comprises a mechanical telescopic arm and a movable lifting column. The movable lifting column is connected with the mechanical telescopic arm. The mechanical telescopic arm move up and down as well as back and forth through the movable lifting column. The movable lifting column drives the mechanical telescopic arm to a working point through movement and / or rotation ofitself. According to the movable palletizing robot, a turntable structure of a fixed palletizing robot is replaced by on-site rotation of the movable lifting column, a joint type swing arm and a railtype movable arm are replaced by the mechanical telescopic arm, thus, the overall structure is simpler, the power quality is higher, and the total power consumption and the total weight of the robot are greatly reduced.

The invention discloses a novel belt tensioning device of a forearm frame of a bucket-wheel stacker reclaimer. The novel belt tensioning device of the forearm frame of the bucket-wheel stacker reclaimer comprises a tension pulley, a bend pulley and a threaded rod tensioning device, wherein the threaded rod tensioning device is composed of a supporting seat frame, a handwheel, a threaded rod and atension pulley, the supporting seat frame is used for fixing the tension pulley and is installed on the outer sides of a left web and a right web of the forearm frame; microscler kidney-shaped holes are formed in the left web and the right web; a shaft of the tension pulley penetrates through the microscler kidney-shaped holes and is connected with the supporting seat frame; the tension pulley isconnected to one end of the threaded rod, and the handwheel is connected to the other end of the threaded rod; a threaded-shaped profile steel rod is arranged on the middle part of the threaded rod, and the threaded-shaped profile steel rod penetrates through a screw opening fixed part of the supporting seat frame and internally meshes with the screw opening fixed part; an upper guide rail and a lower guide rail are arranged on the inner side of the supporting seat frame; a bearing seat of the tension pulley is clamped into the upper guide rail and the lower guide rail of the supporting seat frame to enable the tension pulley to move horizontally rather than move left and right under the drive of the threaded rod; the bend pulley is arranged oppositely at a position slightly below the tension pulley; and the tension pulley and the bend pulley are in S-shaped connection. According to the novel belt tensioning device of the forearm frame of the bucket-wheel stacker reclaimer, the overallweight of the bucket-wheel stacker reclaimer is reduced greatly, and the manufacturing cost is reduced.

The invention discloses a dual-power remote control electric tractor for greenhouses, belonging to the field of agricultural machinery. The electric tractor is characterized in that a charger, a battery pack and a motor speed regulator are electrically connected in sequence; a switch is connected on a circuit between the battery pack and the motor speed regulator; an adjustable switching power is electrically connected with the motor speed regulator; the motor speed regulator is electrically connected with a motor; the motor is connected with a crawler running device by a belt driver and a rear axle assembly; an angle sensor is installed on a speed regulation handle and is electrically connected with the motor speed regulator; and a remote control signal receiving and processing device is electrically connected with a hydraulic integration device. The electric tractor has the following advantages: the weight of the whole machine is reduced; the continuous operation time is not limited; and charging of the battery pack is completed in the operation process. Besides, the electric tractor adopts a set of remote control system, thus greatly reducing the labor intensity of the operators.