32results about How to "With automatic leveling function" patented technology

The invention provides a light gantry structure for a large 3D printer. The light gantry structure for the large 3D printer comprises an X-axis module, a Y-axis module and a Z-axis module. The Z-axis module comprises a gantry type frame and a Z-axis lifting mechanism. The Z-axis lifting mechanism comprises a Z-axis motor and a lead screw, wherein the Z-axis motor and the lead screw are mounted in the center position of the gantry type frame. The X-axis module is mounted on the gantry type frame of the Z-axis module. The lead screw is connected to the middle of the X-axis module to drive the X-axis module to ascend or descend on the gantry type frame. An extrusion machine capable of moving along the X axis is mounted on the X-axis module. The Y-axis module is arranged at the bottom of the gantry type frame. A working platform is arranged on the Y-axis module. The gantry type frame is in sliding fit with the Y-axis module. The 3D printer acts on the middle of the X-axis module through the single lead screw in the Z-axis direction, the mechanism is simplified, the stress of the lead screw is uniform, and meanwhile the gantry type printer structure is simple, stable to operate and capable of guaranteeing precise printing of a model.

The invention discloses a novel leveling device for an orchard operation platform. The device includes a walking chassis, a platform bracket, a support column, a guide column, four leveling oil cylinders and a stabilizing spring. The support column is arranged in the middle of the walking chassis, the four leveling oil cylinders are arranged on all sides of the support column, and the movable endof the guide column extends and fixed in a guide groove in the walking chassis. According to the topographic features that orchards on hills and mountainous regions have rugged terrains and are full of bumps and hollows, the inclination angle, relative to the surface of the operation platform, of the bracket is adjusted when the platform is in operation process so that the platform bracket and thesurface of the platform can be always in a horizontal state, the center of gravity of the orchard operation platform does not deviate from the longitudinal vertical plane of the machine when the orchard operation platform is operated on an uneven slope land, and the possibility of tilting and overturning of the platform is reduced. The problem is solved that the orchard operation platform easilyturns over, and it is guaranteed that personnel on the platform always stand on the horizontal platform surface and operate the platform comfortably at an appropriate position a certain distance awayfrom a tree body.

This invention discloses an automatic method of tree measuring and an electronic angle gage device for tree measuring that comprises optical angle gage and digital camera and locates the CCD surface (optical-to-electric transducer) (2) on the focal surface of the optical angle gage. So the image optical signal collected by telescope system and microsystem is transformed into electronic signal and is digitalized. And the signals are imported into database through communication cable, which can realize the information collecting and automatic recording. The said method is the combination of the process of tree measuring by the electronic angle gage and computer techniques. With the aid of the electronic tree-measuring device, it can realize the measuring, judging and total automatic calculation through the angle gage tree-measuring software to accomplish outdoor and indoor work synchronously and increases the working efficiency and lower intensity of labor.

The invention discloses an automatic leveling telescoping boom engineering vehicle with a fork head. The automatic leveling telescoping boom engineering vehicle comprises a boom assembly, a bracket, a hoisting hydraulic cylinder, a leveling device, a slewing mechanism, a hydraulic winch, a frame and an auxiliary frame, wherein the end part of the boom assembly is hinged to a fork head assembly; the fork head assembly comprises a fork, a fork head connecting frame, a rotating frame, a longitudinal hydraulic cylinder and a transverse hydraulic cylinder; the fork is arranged in a guide groove of the fork head connecting frame; the lower end of the fork head connecting frame is hinged to the rotating frame; the rotating frame is hinged to the head end of the boom assembly; one end of the longitudinal hydraulic cylinder is hinged to the rotating frame, and the other end of the longitudinal hydraulic cylinder is hinged to the boom assembly; one end of the transverse hydraulic cylinder is hinged to the rotating fame, and the other end of the transverse hydraulic cylinder is hinged to the fork head connecting frame. The automatic leveling telescoping boom engineering vehicle can work in a small hoisting space, thus improving the assembling and disassembling flexibility and efficiency, increasing the activity space of hoisting goods and improving the safety of hoisting; manual auxiliary work load is low.

The invention relates to a laser swinger with an automatic leveling function. The laser swinger comprises a base, a leveling mechanism, a carrier plate, a transmitting mechanism and a protection mechanism, wherein the transmitting mechanism comprises a shell, a first motor, a first gear, a second gear and a rotating pipe, a laser source and an object lens are arranged in the shell, a pentagonal prism is arranged in the rotating pipe, the leveling mechanism comprises a detection box, a connecting block, a rolling ball, a supporting column and a plurality of leveling assemblies, a detection mechanism is arranged in the detection box, the leveling assembly comprises a translation unit, a translation block and a telescopic unit, the protection mechanism comprises a protection cover and two lifting assemblies, and each lifting assembly comprises a side plate, a driving unit and two lifting units. The angle of the carrier plate is adjusted by virtue of the leveling mechanism, so that the carrier plate is in a horizontal state, and a precise reference surface can be provided; and by virtue of the protection mechanism, the shell can be shielded by virtue of the protection cover, so that water droplets can be prevented from entering the shell and damaging the device, and the safety operation of the device can be protected.

This is a kind of road surface planometer including machinery body and host which comprised of microcomputer, displaying screen, printer and pile. Its machinery body is eight-wheel extendable level adjusting structure. On the host is firmly linked the host rack, host and displacement sensor. The front wheel group is connected with the front wheel machinery rack by four front wheels. The foreside of the front wheel machinery rack is connected with traction rack, the upside of the front wheel machinery rack is connected with the front back extended girder, and the rearward of the front girder is inserted and flexed inside the middle girder. The back wheel group is connected with the back wheel machinery rack by four back wheels, the upside of the front wheel machinery rack is connected with the forward extended back girder, and the rearward of the back girder is inserted and flexed inside the middle girder. The middle girder is firmly linked by two transverse hollow poles. The upper gemel of the middle girder is linked with the testing wheel arm, whose lower end equips testing wheels. There links pulling reeds between testing wheel and machinery body. It's provided with advantages as convenient to transport, simply to operate, well and truly tested, high dependability, high level adjusting ability and simple to use. It can be used in testing the road surface smoothness of road, square and airport runway.

The invention provides an anodic bonding device which essentially comprises an outer cavity, a pressure device, electrodes and a self-leveling device that is positioned at the bottom of the outer cavity; the self-leveling device is provided with a substrate which is equipped with a base plate and a lug boss positioned on the base plate; the interior of the lug boss is evenly provided with at least three counter bores which are internally provided with springs; the upper end of the spring is provided with a ball-end columella, the other end of the ball-end columella, which is in a hemispheric shape, extends out of the counter bore and is connected with the thermal insulation substrate, the periphery of the lug boss on the base plate is provided with three gag lever posts which are evenly distributed, the gag lever post is slightly higher than the contact face of the ball-end columella and the thermal insulation substrate, so as to limit thermal insulation substrate. In the invention, the self-leveling device can ensure that the whole bonding device forms an up and down floating structure, thus realizing the self-leveling during sample plate bonding and uniform attachment of sample plates.

The invention discloses a rescue ladder stand overhead climbing platform fire truck with a transition platform, and belongs to the technical field of fire trucks. A mixed arm support (4) structure isadopted, the fire truck is provided with the transition platform (6), in particular, the mixed arm support (4) and a corresponding rescue ladder stand (5) adopt a multi-section telescopic structure, so that the fire truck has the following remarkable technical effects and social benefits that an automatic leveling function is achieved, the transition platform can be kept horizontal with the chassis, the height of the arm support after being collected is low, the stress condition is more stable, the bearing capacity of the rescue ladder stand is stronger, the transition platform meets the psychological needs of midway adjustment and rest, and therefore workers are safer to operate.

The invention discloses an automatic leveling control device. The automatic leveling control device comprises a main control panel, a keyboard, an encoder arranged on a gear shaft of an elevator, and a display screen arranged inside a car of the elevator, and the main control panel is connected with the display screen, the keyboard and the encoder and is further connected with an electric controller of the elevator through an output interface of the main control panel. Further, the main control panel comprises a pulse zero clearing interface with is connected with a travel switch arranged at the bottom of the elevator. Further, the inside of the output interface of the main control board is provided with a relay. The main control panel further comprises an alarm interface. The automatic leveling control device enables the elevator to have an automatic leveling function and greatly improves the accuracy of leveling.

The invention provides a washing machine footing with an automatic leveling function and a washing machine. The washing machine footing includes a sheath, an alignment pin and a flexible body assembly, wherein the alignment pin is arranged in the sheath in an axial motion mode, and the sheath defines the circumferential rotation of the alignment pin; the flexible body assembly is arranged in the alignment pin and used for accommodating a hydraulic medium; the flexible body assembly includes an extension-type end acting on the alignment pin, and under the action of the hydraulic medium, the extension-type end conducts extension and contraction to drive the alignment pin to move in the axial direction so as to achieve automatic leveling. According to the hydraulic principle, the footing is filled with the hydraulic medium, and for different pressure, the footing automatically conducts adaptive adjustment because of the liquidity of the hydraulic medium; besides, through the structural design of the alignment pin and the sheath, the limiting installment of the alignment pin in the sheath is achieved, and it is avoided that the rotation of the alignment pin in the sheath affects automatic leveling of the washing machine, so that the effect of automatic leveling is ensured.

The invention provides a washing machine footing with an automatic leveling function and a washing machine. The washing machine footing includes a sheath, an alignment pin and a flexible body assembly, wherein the alignment pin is arranged in the sheath and can move in the axial direction relative to the sheath; the flexible body assembly is arranged in the alignment pin and used for accommodatinga hydraulic medium; one end of the flexible body assembly is installed in the sheath in a limited mode, and the other end serves as an extension-type end acting on the alignment pin; under the actionof a hydraulic medium, the extension-type end of the flexible body assembly conducts extension and contraction to drive the alignment pin to move in the axial direction so as to achieve automatic leveling. According to the hydraulic principle, the washing machine footing is filled with the hydraulic medium, and for different pressure, the footing automatically conducts adaptive adjustment becauseof the liquidity of the hydraulic medium; moreover, the hydraulic medium is placed in the closed flexible body assembly, and a flexible accommodating body is arranged inside the alignment pin, so that the problem of hydraulic medium leakage is effectively solved, and the working stability of the footing is ensured.

The invention provides a washing machine footing with an automatic leveling function and a washing machine. The washing machine footing includes a sheath, an alignment pin and a flexible body assembly, wherein the alignment pin is arranged in the sheath and can move in the axial direction relative to the sheath; the flexible body assembly is arranged in the alignment pin and used for accommodatinga hydraulic medium; one end of the flexible body assembly is installed in the sheath in a limited mode, and the other end serves as an extension-type end acting on the alignment pin; under the actionof a hydraulic medium, the extension-type end conducts extension and contraction to drive the alignment pin to move in the axial direction so as to achieve automatic leveling; the flexible body assembly includes a flexible accommodating body, an installment assembly for installing the flexible accommodating body, and a protection mechanism which is arranged between the installment assembly and the flexible accommodating body and used for protecting the flexible accommodating body. According to the washing machine footing with the automatic leveling function and the washing machine, the flexible body assembly is installed in the sheath in a limited mode so as to prevent the flexible body assembly from damage; besides, through arrangement of the protection mechanism, it is avoided that theflexible accommodating body is directly in contact with the installment assembly, which greatly reduces the damage probability of the flexible accommodating body and prolongs the service life of the flexible accommodating body.

The invention discloses an automatic leveling structure which aims at being capable of providing position compensation and automatic leveling functions and enabling a working assembly to automatically reach a level condition. The automatic leveling structure comprises an outer compensation seat, an inner compensation seat, an outer compensation shaft and an outer compensation column. The inner compensation seat is provided with a main inner seat bearing hole and an auxiliary inner seat bearing hole, a main front-back adjusting bearing is arranged in the main inner seat bearing hole, and an auxiliary front-back adjusting bearing is arranged in the auxiliary inner seat bearing hole. The outer compensation shaft and the main front-back adjusting bearing are connected, and the outer compensation column is connected with the auxiliary front-back adjusting bearing. The inner compensation seat is provided with a pendulum bob hole and an inner compensation shaft, a pendulum bob is arranged in the pendulum bob hole, and the inner compensation shaft is provided with two left-right adjusting bearings which are located in the corresponding pendulum bob bearing holes. The automatic leveling structure has the beneficial effects that the automatic leveling function is achieved, the capability of self-adaptive adjusting and buffering damping is achieved, flexibility and stability can be adjusted, and the automatic leveling structure meets various demands.

The invention discloses a novel orchard operation platform leveling device, which comprises a walking chassis, a platform bracket, a support column, a guide column, four leveling cylinders and a stabilizing spring, the support column is arranged in the middle of the walking chassis, and the four leveling The oil cylinders are respectively arranged on the front, back, left, and right sides of the support column, and the movable end of the guide column extends to the guide groove fixed on the walking chassis. The invention can adjust the inclination angle of the platform bracket and even the work surface during the operation process of the platform according to the terrain characteristics of hills and mountainous orchards, such as undulations, depressions and protrusions, so that the platform bracket and the table are always in a horizontal state, and the orchard operation can be maintained. The center of gravity of the platform does not deviate from the vertical plane of the machine when the platform is operating on slopes and uneven ground, reducing the possibility of tilting and tipping of the platform, effectively solving the problem of tipping danger of the orchard operation platform in the prior art, and ensuring the safety of personnel on the platform Always stand on a horizontal platform, and always operate comfortably at a suitable position from the tree.

The invention provides a light gantry structure for a large 3D printer. The light gantry structure for the large 3D printer comprises an X-axis module, a Y-axis module and a Z-axis module. The Z-axis module comprises a gantry type frame and a Z-axis lifting mechanism. The Z-axis lifting mechanism comprises a Z-axis motor and a lead screw, wherein the Z-axis motor and the lead screw are mounted in the center position of the gantry type frame. The X-axis module is mounted on the gantry type frame of the Z-axis module. The lead screw is connected to the middle of the X-axis module to drive the X-axis module to ascend or descend on the gantry type frame. An extrusion machine capable of moving along the X axis is mounted on the X-axis module. The Y-axis module is arranged at the bottom of the gantry type frame. A working platform is arranged on the Y-axis module. The gantry type frame is in sliding fit with the Y-axis module. The 3D printer acts on the middle of the X-axis module through the single lead screw in the Z-axis direction, the mechanism is simplified, the stress of the lead screw is uniform, and meanwhile the gantry type printer structure is simple, stable to operate and capable of guaranteeing precise printing of a model.

The invention relates to a U-shaped workpiece face milling tool with an automatic leveling function. The middle of a U-shaped workpiece is a machining face, straight plates are manufactured at the two ends of the U-shaped workpiece, and preformed holes are formed in the straight plates; the face milling tool comprises a base, and a supporting block is vertically and fixedly installed on the top face of the base; a transversely-through square hole is formed in the upper portion of the supporting block, a positioning square pipe fixedly connected with the side wall of the supporting block axially extends out of one end of the square hole, and a pressing block is hinged to the inner wall of the other end of the square hole; the to-be-machined workpiece is hung on the top face of the positioning square pipe, and the lower portion of the positioning square pipe is transversely connected with a pin shaft in a penetrating manner, wherein the pin shaft is installed in the multiple preformed holes in a penetrating manner; and the free end of the pressing block extends into the positioning square pipe, and the bottom face of the free end of the pressing block is provided with an arc-shaped concave face matched with the radian of the periphery of the pin shaft. The face milling tool does not need to clamp the side wall of the workpiece, so that clamping damage to the surface of the workpiece is avoided, the clamping speed is high, the positioning precision is high, and the face milling tool is particularly suitable for face milling machining of the bottom faces of large-batch U-shaped workpieces.

The invention discloses an automobile bearing level detection device with an automatic leveling function. The automobile bearing level detection device comprises a base, an adjusting screw rod, a fixed rod, a detector and a side detection rod; a main box body is fixed on the base, a low-speed motor is fixed on the base through a bolt, and a supporting plate is fixed at the tail end of an output shaft of the low-speed motor; and meanwhile, an electric telescopic rod is fixed to the supporting plate, a clamping plate is fixed to a first spring, a semicircular rubber mat is fixed to the clamping plate, a guide rod is fixed to the clamping plate, and meanwhile the guide rod is connected with a movable block. According to the automobile bearing level detection device with the automatic leveling function, by adopting a multi-axial adjusting and limiting mechanism, the detection device can be adjusted, and bearings of different sizes can be detected; the bearings of different sizes can be limited and fixed through a multi-directional linkage fixing mechanism, by matching with a horizontal detection device and a radian detection device, the detection of multiple data of the bearings is realized, and the detection efficiency is improved.

The invention discloses an automatic leveling structure which aims at being capable of providing position compensation and automatic leveling functions and enabling a working assembly to automatically reach a level condition. The automatic leveling structure comprises an outer compensation seat, an inner compensation seat, an outer compensation shaft and an outer compensation column. The inner compensation seat is provided with a main inner seat bearing hole and an auxiliary inner seat bearing hole, a main front-back adjusting bearing is arranged in the main inner seat bearing hole, and an auxiliary front-back adjusting bearing is arranged in the auxiliary inner seat bearing hole. The outer compensation shaft and the main front-back adjusting bearing are connected, and the outer compensation column is connected with the auxiliary front-back adjusting bearing. The inner compensation seat is provided with a pendulum bob hole and an inner compensation shaft, a pendulum bob is arranged in the pendulum bob hole, and the inner compensation shaft is provided with two left-right adjusting bearings which are located in the corresponding pendulum bob bearing holes. The automatic leveling structure has the beneficial effects that the automatic leveling function is achieved, the capability of self-adaptive adjusting and buffering damping is achieved, flexibility and stability can be adjusted, and the automatic leveling structure meets various demands.

The invention provides a washing machine with an automatic leveling function. Fixed footings and hydraulic footings are installed on the bottom of a washing machine body respectively, and at least twofixed footings and at least one hydraulic footing form a supporting plane used for supporting the washing machine body; the hydraulic footings comprise fixed parts and movable parts, and hollow cavities are formed between the fixed parts and the movable parts and filled with a hydraulic medium; under the action of pressure, the hydraulic medium can circulate in the hollow cavities in the hydraulic footings and / or a hollow cavity between the hydraulic footings to drive the movable parts to stretch out and draw back; through cooperation of the hydraulic footings and the fixed footings, automatic leveling is conducted. According to the washing machine with the automatic leveling function, the basic principle is used that three points determine a plane, the two fixed footings determine two points, and one hydraulic footing determines the other point, so that it is ensured that even the ground surface is uneven, the fixed footings tightly bear gravity, the hydraulic footings can automatically stretch out and draw back according to borne pressure, and then automatic leveling of the washing machine is achieved.

The invention discloses a lifting table with a function of automatically adjusting the levelness. The lifting table comprises a table plate; a first table leg; a second table leg; a first driving mechanism, which is connected to the first table leg and drives the first table leg to stretch out and draw back so as to adjust the height of the first table leg; a first motor, which is connected to the first driving mechanism to provide driving force for the first driving mechanism; a second driving mechanism, which is connected to the second table leg and drives the second table leg to stretch out and draw back so as to adjust the height of the second table leg; a second motor, which is connected to the second driving mechanism to provide driving force for the second driving mechanism; and a controller, which is electrically connected to the first motor and the second motor to control the first motor and the second motor. The controller adjusts the duty ratio of the first motor and / or the second motor according to the height difference between the first table leg and the second table leg so as to reduce the height difference. According to the lifting table with the automatic levelness adjusting function, the duty ratio of the motor can be automatically adjusted according to the height difference of the table legs, so that the height difference of the table legs is reduced, and the table plate is kept horizontal.

The invention discloses a chassis frame. The chassis frame comprises a vertical plate assembly, a radiator base, a power transmission base, a loading device hinge base, a thrust rod base, an excavating device hinge base, a suspension cylinder base and a cab base, wherein the radiator base, the power transmission base, the loading device hinge base, the thrust rod base, the excavating device hinge base, the suspension cylinder base and the cab base are fixedly arranged on the vertical plate assembly. The chassis frame is advantaged in that working conditions such as shoveling, digging, bulldozing, clamping and hoisting operation are effectively fused, on the premise that the strength and rigidity are met, the structure is compact, the working range is enlarged, and working efficiency of emergency rescue is greatly improved; a radiator sinking type installation structure can effectively reduce the height of a front end of a whole vehicle, and the operation visual field is good; a vertical plate frame structure is adopted as a whole, and torsional deformation of excavation operation and the like is reduced.

The invention discloses an electronic angle gauge tree measuring instrument and an automatic tree measuring method. The instrument is a combination of an optical angle gauge and a digital camera. It places the CCD area array (photoelectric converter) ② of the digital camera on the focal plane of the optical square gauge. Therefore, the image light signals collected by the telescopic system ① and the microscopic system ③ are digitized after being converted into electronic signals by the CCD. Then it is transmitted to the database through the data communication cable to realize the automation of information collection and recording. The tree measuring method is a combination of the electronic angle gauge tree measuring process and computer technology. With the cooperation of the electronic angle gauge dendrometer, the measurement, judgment and calculation of the tree measurement process are fully automated through the angle gauge tree measurement software, which enables the synchronization of the outside and the industry, which can greatly improve work efficiency and reduce labor intensity. In particular, the stand volume can be obtained without measuring the average height of the stand, which overcomes the difficulties of overlapping tree crowns and poor visibility in the forest, and can further improve the practicability of measuring trees with angle gauges, and has broad market prospects.

The invention discloses an offshore buoy with a self-leveling function, and belongs to the field of buoys, the offshore buoy with the self-leveling function comprises a buoyancy tank and a balancing weight, the buoyancy tank is of an annular cavity structure, a support is arranged at the top of the buoyancy tank, the support comprises three supporting rods, the three supporting rods are assembled into a triangular pyramid shape, an equipment platform is arranged at the top of the support, and the balancing weight is arranged on the equipment platform. A ball groove is fixed to the bottom of the equipment platform, a connecting rod is fixed to the top of the balancing weight, a ball head matched with the ball groove is fixed to the top of the connecting rod, petal-shaped bags are fixed to the middle of the connecting rod, the three petal-shaped bags are evenly distributed at equal angles, and an extrusion ring is fixed to the support, is of an annular structure and is connected to the outer sides of the circumferences of the three petal-shaped bags in a sleeving mode. The bottom end of the supporting rod is provided with an air cavity, a piston matched with the air cavity is arranged in the air cavity, and the bottom of the piston is rotationally connected with a sliding rod. The automatic leveling damping device has the automatic leveling function, is high in damping performance, can effectively prolong the service life of equipment, has market prospects and is suitable for popularization.

The invention provides a washing machine foot with an automatic leveling function and a washing machine. The washing machine foot includes: a sheath; an adjustment foot arranged in the sheath and capable of moving axially relative to it; and a flexible body assembly arranged in the adjustment foot It is used to accommodate hydraulic medium; one end of the flexible body component is limitedly installed in the sheath, and the other end is a telescopic end acting on the adjustment foot; the telescopic end stretches under the action of the hydraulic medium to drive the adjustment foot to the axial direction The movement realizes automatic leveling; the flexible body component includes a flexible containing body, an installation component for installing the flexible containing body, and a protection mechanism arranged between the mounting component and the flexible containing body for protecting the flexible containing body. In the present invention, the flexible body component is installed in the sheath in a limited position to avoid damage to the flexible body component. In addition, through the setting of the protection mechanism, the flexible containing body is prevented from directly contacting the installation component, which greatly reduces the damage probability of the flexible containing body and prolongs its life. service life.

The invention provides an anodic bonding device which essentially comprises an outer cavity, a pressure device, electrodes and a self-leveling device that is positioned at the bottom of the outer cavity; the self-leveling device is provided with a substrate which is equipped with a base plate and a lug boss positioned on the base plate; the interior of the lug boss is evenly provided with at least three counter bores which are internally provided with springs; the upper end of the spring is provided with a ball-end columella, the other end of the ball-end columella, which is in a hemispheric shape, extends out of the counter bore and is connected with the thermal insulation substrate, the periphery of the lug boss on the base plate is provided with three gag lever posts which are evenly distributed, the gag lever post is slightly higher than the contact face of the ball-end columella and the thermal insulation substrate, so as to limit thermal insulation substrate. In the invention, the self-leveling device can ensure that the whole bonding device forms an up and down floating structure, thus realizing the self-leveling during sample plate bonding and uniform attachment of sample plates.

The invention discloses a land leveling system for a paddy field rotary cultivator. The land leveling system comprises a left-side pull rod, a middle pull rod, a right-side pull rod, a land leveling unit, a driving unit, a hydraulic operation mechanism and a controller, wherein the hydraulic operation mechanism is used for manipulating the land leveling unit; the controller is used for controlling the hydraulic operation mechanism. The land leveling system for the paddy field rotary cultivator has the advantages that a land leveling device with an automatic leveling function is additionally arranged on a rotary cultivator according to agronomic requirements of rice cultivation, so that a land leveling plate is positioned in a horizontal plane all the time in the cultivating and land-leveling processes, therefore the influence to the land leveling device from a tractor due to different mud foot depths and own vibration during a proceeding process is reduced, and the land leveling precision is further improved. The land leveling system for the paddy field rotary cultivator can be used with the existing paddy field rotary cultivator for performing rotary cultivation and soil preparation on paddy fields in a matching manner, so that the land leveling effect of the paddy field rotary cultivator is improved; meanwhile in comparison with a paddy field laser land leveler, the land leveling system for the paddy field rotary cultivator has the advantages of low cost and convenience in popularization and application.

The invention discloses a novel electronic automatic leveling projector which comprises a rear shell, a transverse electronic level gauge and an automatic leveling lens. A power supply plug is arranged on the rear shell. A video input interface is formed above the power supply plug. A computer connecting interface is formed in the right end of the rear shell. An upper shell is arranged on the rear shell. A switch and a digital panel are arranged on the upper shell. An adjusting groove is formed in the front end of the upper shell. Heat dissipation discs are arranged on the two sides of the upper shell. A lower shell is arranged at the lower ends of the heat dissipation discs. A longitudinal electronic level gauge is arranged beside the transverse electronic level gauge. The automatic leveling lens is arranged in the adjusting groove. The interior of the automatic leveling lens is connected with the transverse electronic level gauge and the longitudinal electronic level gauge through wires. The novel electronic automatic leveling projector is simple in structure, good in heat dissipation effect, convenient to operate, reliable and durable, and has an automatic leveling function.

The invention discloses an electric forklift safety control method which comprises the following steps that S1, a whole forklift is powered on, whether the lifting height of a portal frame exceeds the safety height or not is judged, if the lifting height does not exceed the safety height, S2 is executed, and if not, S3 is executed; s2, if the forward inclination switch or the backward inclination switch is turned on, whether the forward inclination angle or the backward inclination angle of the portal frame exceeds the safety angle or not is detected, if the forward inclination angle or the backward inclination angle does not exceed the safety angle, the normal inclination speed is maintained, and otherwise, the inclination speed is reduced; s3, the driving speed of the forklift and the lifting speed of the portal frame are reduced, whether a pressure sensor is turned on or not is detected, if the pressure sensor is not turned on, the step S4 is executed, and if the pressure sensor is turned on, the step S5 is executed; s4, if the door frame is not opened, the inclination speed of the door frame is reduced; s5, if the portal frame is in the backward tilting state, the backward tilting speed of the portal frame is reduced; if the portal frame is in the forward inclination state, the forward inclination speed of the portal frame is reduced, and the forward inclination angle of the portal frame is limited, the speed regulation and leveling functions are achieved, the safety performance of the forklift is improved, and the operation difficulty of the forklift is reduced.

This is a kind of road surface planometer including machinery body and host which comprised of microcomputer, displaying screen, printer and pile. Its machinery body is eight-wheel extendable level adjusting structure. On the host is firmly linked the host rack, host and displacement sensor. The front wheel group is connected with the front wheel machinery rack by four front wheels. The foreside of the front wheel machinery rack is connected with traction rack, the upside of the front wheel machinery rack is connected with the front back extended girder, and the rearward of the front girder is inserted and flexed inside the middle girder. The back wheel group is connected with the back wheel machinery rack by four back wheels, the upside of the front wheel machinery rack is connected with the forward extended back girder, and the rearward of the back girder is inserted and flexed inside the middle girder. The middle girder is firmly linked by two transverse hollow poles. The upper gemel of the middle girder is linked with the testing wheel arm, whose lower end equips testing wheels. There links pulling reeds between testing wheel and machinery body. It's provided with advantages as convenient to transport, simply to operate, well and truly tested, high dependability, high level adjusting ability and simple to use. It can be used in testing the road surface smoothness of road, square and airport runway.