206 results about "Field working" patented technology

The invention provides a control system and method for power distribution and power generation control of an extended-range agricultural machine based on intelligent identification of a working road surface and a hybrid tractor. The control system comprises the following steps: identifying a field type by collecting image information of a driving road, calculating required power of a vehicle range extender in a corresponding working scene based on the field type, and controlling a range extender assembly; and adjusting the torque of the driving motor and the driving motor based on the field type, the rotating speed of the driving motor and the vehicle speed. Based on field type recognition and historical working data, accurate distribution of driving force and efficient and stable power generation of the range extender can be achieved, the safety and the service life of a power battery are guaranteed, and the farmland operation efficiency of the tractor is improved.

The invention discloses a tractor dynamic load reliability coupling test system and method, and belongs to the technical field of non-road vehicle testing. The system comprises a multi-dimensional data management platform, a tractor dynamic load reliability coupling test bench, a performance analysis platform and a data server. The multi-dimensional data management platform collects field working condition data and test data, the test bench integrates a plurality of loading systems and simulation systems such as direct-drive type driving wheels, and a plurality of functional parts of the tractor can be dynamically coupled, loaded and tested at the same time in a simulated field environment; and the performance analysis platform is connected with the data server, and evaluates the comprehensive performance and reliability of the whole tractor and the functional parts thereof through a quantitative formula. According to the invention, indoor reproduction of a field operation scene is realized, test efficiency and reliability evaluation comprehensiveness are improved, and the method is suitable for whole tractor performance test.

The invention belongs to the technical field of sheet welding deformation leveling, and discloses a construction method and a leveling method of a sheet leveling process parameter model, and the method comprises the following steps: M1, obtaining corresponding material attributes according to a sheet material needing to be leveled on site; m2, related data of the field welding process are known; m3, the initial leveling position, the heating time, the heating current and the heating frequency are obtained according to the material attributes and the welding process parameters of the thin plate; step M4, calculating the heat flux density of the Gaussian heat source model of the heating position according to the heating current, selecting the next heating position according to the heat flux density, and obtaining a heating sequence; and step M5, repeatedly executing the steps M3 to M4, and further correcting the heating time, the heating current and the heating frequency according to the actual temperature change data to obtain a final thin plate flattening process parameter model. According to the method, data of material attributes of an actual flattening heating workpiece and actual flattening working conditions are collected, and a multi-input and multi-output thin plate flattening process parameter model conforming to field working conditions is established.

The utility model discloses a carbon dioxide fracturing device with a flying stopping device, which comprises a fracturing device body which is cylindrical on the whole, a cavity is arranged in the fracturing device body, liquid carbon dioxide is filled in the cavity, and a filling head used for filling the liquid carbon dioxide into the cavity is arranged at the front end of the fracturing device body. A cavity is formed in the fracturing device body, a heating pipe extending into the cavity is arranged on the front side of the fracturing device body, an energy release channel communicated with the rear end of the cavity is formed in the fracturing device body, a constant-pressure shearing piece used for sealing a front end opening of the energy release channel is arranged at the rear end of the cavity, the flying stopping device is arranged at the rear end of the fracturing device body, and a power input end at the front end of the flying stopping device is communicated with the rear end of the energy release channel. The fracturing device is simple and convenient to operate, the working efficiency is greatly improved, the fracturing device and the rock mass are jacked into a whole by utilizing the impact force of high-pressure airflow during blasting, the phenomenon of pipe flying is effectively avoided, and the fracturing device has important significance on the safety of field work and the improvement of the working efficiency and the economic benefit, and can be suitable for larger hole diameter range of blast holes.

The invention relates to a pile-anchor composite foundation bearing capacity exerting coefficient calculation method, medium, calculation device and system, and the method comprises the steps: obtaining the rock mechanical parameters of each layer of geology of an area where a pile-anchor composite foundation is arranged, initializing the parameters of the pile-anchor composite foundation based on a design load, building an interface bonding-sliding constitutive model according to the rock mechanical parameters, and calculating the bearing capacity exerting coefficient of the pile-anchor composite foundation; a pile-anchor composite foundation load transfer calculation model under the current geological condition is established, the uplift bearing capacity of the pile-anchor composite foundation is calculated through the load transfer calculation model and pile-anchor composite foundation parameters, the uplift bearing capacity of the upper pile foundation and the uplift bearing capacity of the lower anchor rod foundation are extracted, and bearing capacity exerting coefficients are calculated; the invention discloses a method-based implementation medium and system. The calculation device comprises an acquisition module, a model construction module and a calculation module. According to the invention, the field workload is reduced, the engineering cost is reduced, the working state of the pile-anchor composite foundation under various geological conditions is finely simulated, and the operation is convenient.

The invention relates to the technical field of digital geological project management, in particular to a geological project management field work flow digital construction method, which comprises the following steps of based on mobile application data acquisition, analyzing field work task progress, environment information and operation normalization, identifying abnormal nodes, and adjusting task priority and resource configuration. According to the geological field operation risk safety level judgment method and system, the task states are analyzed in combination with the environment elements and the execution conditions during collection, the information comprehensiveness and transparency are improved, and the geological field operation risk safety level judgment information table is obtained. During execution, priority and resource configuration are dynamically adjusted, resource utilization efficiency is enhanced, resource input and output results are recorded, operation efficiency and matching degree are quantified, task positions and environment factor weights are fused, risk influences are normalized and analyzed, and project continuity and safety are guaranteed.

The invention relates to the technical field of agricultural machinery operation, in particular to a field operation path planning method and system for agricultural machinery equipment in hilly and mountainous regions, and the method comprises the following steps: obtaining terrain data of the hilly and mountainous regions and operation data of the agricultural machinery equipment, so as to construct an environment equipment cooperation data set; analyzing the environment equipment collaborative data set to obtain a field operation segmentation area and a field operation priority as an agricultural machinery operation analysis result; based on the agricultural machinery operation analysis result, establishing a four-wheel steering kinematics model and an agricultural machinery trafficability constraint model as mechanical constraint conditions of agricultural machinery equipment; generating an initial agricultural machine operation path by combining the agricultural machine operation analysis result and the agricultural machine equipment mechanical constraint condition; and performing multi-target adaptive adjustment on the initial agricultural machine operation path according to an agricultural machine operation mode to obtain an optimal agricultural machine operation path. The method is combined with mechanical characteristics of agricultural machinery equipment, the accuracy of path planning is improved, and complex terrains of hills and mountains are effectively adapted.

The present application relates to the technical field of wind farm active wake control, and discloses an active wake control method and device suitable for wind farm limited power operation, wherein the present application combines the active scheduling suggestion of the unit affected by the wake influence level, matches the actual information of limited power and shutdown, customizes the wake optimization control strategy in the limited power mode and the non-limited power mode, accurately adapts to the real-time operation working condition of the station, can fully consider the actual wake effect loss and the unit fatigue damage, avoids the wake redirection misalignment problem caused by the mismatch between the strategy and the field working condition, effectively improves the adaptability and reliability of the wake control strategy, guarantees that the wake redirection always plays a positive benefit effect, and greatly reduces the benefit loss caused by the strategy failure.

The utility model discloses a crushing and grinding integrated device for calcined talcum powder blocks, which relates to the technical field of calcined talcum powder production, and comprises a machine body, a crushing cavity, a crushing cavity, a temporary storage cavity and a grinding cavity are sequentially arranged in the machine body from top to bottom, the crushing cavity, the crushing cavity, the temporary storage cavity and the grinding cavity are mutually connected, one side of the crushing cavity is connected with a feed port, and the other side of the crushing cavity is connected with a discharge port. According to the device, talcum powder blocks can slide into the crushing cavity through the inclined feeding opening under the action of self weight, the talcum powder blocks can be crushed into small blocks through the crushing teeth, the small talcum powder blocks can be crushed into coarse powder through the crushing hammer, and the coarse powder is crushed into fine powder through the crushing hammer. Coarse powder can be ground through a gap between the upper grinding disc and the lower grinding disc, ground talcum powder can be discharged out of the machine body through a discharging opening, crushing and grinding of talcum powder blocks are achieved, external air can be sucked in through a feeding opening by starting an exhaust fan, dust generated during crushing is prevented from escaping through the feeding opening, and the crushing efficiency is improved. And the tidiness of the field working environment is ensured.

The utility model discloses a carbon fiber collecting and knot catching device. The carbon fiber filament collecting and knot catching device comprises a detection mechanism which is arranged on one side of a filament bundle and used for detecting a filament bundle connector; the alarm mechanism is used for reminding a worker when the detection mechanism detects the tow joint; and the control mechanism is electrically connected with the detection mechanism and the alarm mechanism. According to the carbon fiber collecting and knotting device, the detection mechanism, the control mechanism and the alarm mechanism are arranged, when the detection mechanism detects a tow joint, a signal is sent to the control mechanism, and the control mechanism receives the signal and controls the alarm mechanism to work, so that field workers are reminded to track the tow joint. Through the arranged detection mechanism, the working intensity of on-site workers can be reduced, and meanwhile, the on-site workers can focus more attention on other finished product appearance index control aspects.

The utility model relates to an automatic slag salvaging device for anode pouring molten iron, which comprises a furnace surface, an electric furnace mounted on the furnace surface, a slag salvaging robot mounted on the furnace surface, a control box mounted on the bottom surface of the slag salvaging robot, a mounting base of the slag salvaging robot mounted on the surface of the control box, a fixing rod connected to the surface of the mounting base, and an operating rod connected to one end of the fixing rod. An operation head is fixedly connected to the end of the operation rod, a fixing plate is fixedly connected to the bottom face of the operation head, and slag salvaging grab buckets are hinged to the side walls of the two sides of the fixing plate respectively. And a slag box is arranged on the furnace surface. And an ash sticking barrel is arranged on the stove surface. The automatic slag salvaging device has the advantages of being reasonable in structural design, convenient and fast to operate, low in machining and manufacturing cost, safer and more reliable to operate, time-saving and labor-saving, parameters can be set according to site working condition requirements of slag salvaging, automatic slag salvaging operation is achieved, and personal safety of site workers is fully guaranteed.

Embodiments of the present disclosure provide a computer implemented method for analyzing a video from a location to enable obtaining electronic work permit authorizing a scope of work to be performed at a location. The method is being performed by a client application executed at a second electronic device. The method comprises receiving, from a first electronic device at the location, a permit authorization request message comprising an input identifying the scope of work to be performed at the location. In response to receiving the permit authorization request message. the method comprises transmitting a response message to the first electronic device indicating whether or not the work permit is authorized for the scope of work.

The embodiment of the invention provides a dexterous hand operation method and device, electronic equipment and a computer readable medium. The method comprises the following steps: establishing a simulation environment for simulating interaction between the dexterous hand and an object, constructing a strategy neural network, training the strategy neural network by using interaction data generated in the simulation environment, and then controlling the entity dexterous hand by using the trained strategy neural network so as to complete an operation task on a target object. The action of the dexterous hand is controlled by adopting the strategy neural network, and an operation strategy is autonomously learned in a simulation environment through reinforcement learning, so that the dependence on precise modeling of complex power equipment can be bypassed, and the trained strategy network can directly adapt to diversified field working conditions of power operation and maintenance scenes; therefore, the problem of insufficient generalization ability caused by model mismatch in a traditional method is solved, and the applicability of the dexterous hand in an electric power operation and maintenance scene is improved.

The utility model relates to the technical field of connecting devices, and provides an auxiliary test tool connecting shell, which is characterized in that a host is connected with a slave in a sliding manner by using a host connecting side wall to be connected with a slave connecting side wall in a sliding manner, and the host and the slave are connected into a whole during transportation and can be quickly separated during use; the separation of the main machine and the slave machine under the conditions of numerous tools and complex environment on the operation site in the carrying process is avoided, and the efficiency of on-site work is improved; by using the host telescopic side wall, the host elastic side wall, the host connecting side wall, the slave telescopic side wall, the slave elastic side wall and the slave connecting side wall, and utilizing the insertion block, the accommodating cavity and the locking knob, the host and the slave of more sizes can be adapted, and the application range of the host and the slave of the utility model is expanded.

The present application relates to unmanned agricultural machinery technical field, specifically relates to a kind of full coverage field path planning method and device based on improved genetic algorithm.The method comprises: S1, constructs field environment map using grid method.S2, the free grid in field environment map is chromosomally encoded, and a plurality of initial chromosomes are randomly generated.S3, initial chromosome is adjusted, and legal chromosome is obtained.S4, construct fitness function based on multi-objective equilibrium criterion, determine the fitness of legal chromosome.S5, initial chromosome is evolved, and the next generation population is generated, as the parent population of next iteration.S6, determine whether to end this iteration, if yes, then the highest fitness chromosome in contemporary population is output for decoding, and full coverage path is obtained;If not, return to step S3.The present application can reduce repetitive work area and turning number, improve the field work efficiency and work quality of unmanned agricultural machinery.

This invention discloses a farmland operation chassis and farmland operation machinery, belonging to the technical field of farmland operation machinery. The farmland operation chassis includes: a drive chassis, a front suspension device, a center mounting device, and a rear suspension device. The drive chassis is used to mount the wheels; the front suspension device is used to mount and raise / lower front-mounted agricultural implements; the center mounting device is used to mount and raise / lower mid-mounted agricultural implements; and the rear suspension device is used to mount and raise / lower rear-mounted agricultural implements. The farmland operation machinery includes a cab, a farmland operation chassis, and wheels. The cab is mounted at the front end of the drive chassis of the farmland operation chassis, and the wheels are mounted on the drive chassis. According to different operational needs, corresponding agricultural implements can be mounted using the front suspension device, center mounting device, and rear mounting device, thereby avoiding the need to repeatedly purchase field operation power devices for different operational stages, reducing agricultural production costs, and facilitating the sharing of farmland and crop information across different operational stages.

The utility model discloses a special gauge of inner tooth cross bar distance measurement belongs to the processing detection equipment field of inner tooth product. The special gauge includes: setting fixed area, buffer area and test area on the detection platform, setting up the micrometer in the fixed area, setting up the detection mobile unit in the buffer area, and the detection mobile unit one end is contacted with the detection rod of micrometer, and the other end of detection mobile unit sets up the mobile round bar, setting up the fixed round bar in the test area, and the fixed round bar sets up at least one, when detecting, mobile round bar and fixed round bar all are located in the gear interior. At present, the inner tooth cross bar distance size is three -coordinate measurement, and the measurement time is long, and it needs professional measuring personnel to operate three -coordinate equipment, and the operation is complex and requires high, and the equipment value is high. The special gauge of this design, through the ingenious design, can reach the measurement precision of three -coordinate, and the operation is simple, and the efficiency is high, and the volume is small, can be placed in the production and selection field workbench, and the cost is low.

The utility model belongs to the field of belt conveyors, particularly relates to an automatic deviation rectifying roller, and aims to solve the common problem of deviation of a conveyor belt in the existing belt conveyor industry, and the problem that a roller at the tail part is adjusted by a lead screw and needs to be manually adjusted, so that the workload of field staff is increased, and the production cost is reduced. In order to solve the problem that the production progress of a customer is delayed due to the fact that the conveying is carried out in the shutdown state of the conveyor, the following scheme is provided: the device comprises a base, the top of the base is rotatably connected with a rotating rod through a bearing, the top end of the rotating rod is fixedly provided with an adjusting frame, and a belt can be automatically adjusted and prevented from deviating through a deviation correcting mechanism and an induction mechanism; therefore, manual adjustment is not needed, the labor intensity of on-site workers and the number of workers are reduced, workers are protected, on-site work is not needed, the labor cost of enterprises is reduced, meanwhile, the belt can be adjusted without shutdown, deviation of the belt is monitored all the time, and the production efficiency of the enterprises is improved.

The application discloses a self-walking method of an automatic plate shoveling machine, and comprises the following steps: step S1: automatically generating a work station coordinate according to the layout of a field work station, and dividing a magnetic track into a plurality of work points according to the layout of the work station; step S2: in a working state, a magnetic sensor at both ends of the automatic plate shoveling machine senses the position of the magnetic track at all times, and ensures that the automatic plate shoveling machine rounds along a magnetic track running route; step S3: collecting data of the automatic plate shoveling machine running a round along the magnetic track and running data of each work point, and automatically calculating and generating running data between each adjacent work point; and step S4: automatically identifying and marking the coordinate of a work point corresponding to a to-be-cleaned signal emitted on the work station, and moving the automatic plate shoveling machine along the magnetic track to move the automatic plate shoveling machine to the coordinate of the marked work point. The self-walking method of the automatic plate shoveling machine can stably control the walking of the automatic plate shoveling machine, and deviation does not occur.

1. The name of the design product: field work machine. 2. The use of the design product: for field work. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view 1. 5. The top surface of the design product is the part that is not easy to see or cannot be seen during use, so the top view is omitted; the bottom surface of the design product is the part that is not easy to see or cannot be seen during use, so the bottom view is omitted.

The invention relates to the technical field of precision agriculture, in particular to a field operation positioning system of agricultural machinery, which comprises a channel stability detection module, a signal-noise skew recognition module, a solution drift recognition module, an attitude vector extraction module and a precision parameter construction module. According to the method, fine identification of the abnormal state of the multi-frequency channel is realized by constructing a channel stability index, enhancing the identification capability of carrier hopping centralized characteristics and utilizing dual trend discrimination of a signal-to-noise ratio change direction and a fluctuation amplitude, and the abnormal state of the multi-frequency channel is identified by combining a coupling relationship between a resolving time rhythm and an error trajectory. The method improves the sensitivity of solving drift identification, optimizes the accuracy of inertial navigation attitude offset extraction by adopting consistency analysis of attitude angle change rate and acceleration included angle, and combines agricultural machinery structure parameters with path response trend to form a precision tolerance configuration basis of structure category guidance. And the adaptive capacity of positioning error rules of various agricultural machines in different operation states is enhanced.

The utility model relates to the technical field of electrical safety. The hydropower station inspection device comprises a guide assembly, a sliding mechanism, a base, a rotating assembly and a monitoring mechanism, the sliding mechanism is slidably connected with the guide assembly, the base is installed on the sliding mechanism, the rotating assembly is rotatably connected with the base, and the monitoring mechanism is installed on the rotating assembly; wherein the monitoring mechanism is used for monitoring the field working state of the hydropower station and collecting the field working state information. By integrating the guiding assembly, the sliding mechanism, the base, the rotating assembly and the monitoring mechanism, automatic inspection of hydropower station equipment is achieved, and the problems that in existing hydropower station equipment inspection, the inspection efficiency is low, data is inaccurate, potential safety hazards are large, and comprehensive and real-time monitoring is difficult to achieve due to the fact that manpower is relied on are solved.

The utility model provides an electric service workshop ZPW2000R practical training simulation platform, which is characterized by comprising a ZPW2000R interval blocking cabinet, an interval passing signal machine, a pull-in signal machine and a practical training operation console which are sequentially connected in series through a circuit, a lighting circuit relay combination, a mutual control appointment relay combination, a node relay combination and a track relay combination are arranged in the pull-in signal machine, and the mutual control appointment relay combination is used for achieving the interlocking relation of mutual control appointment between relays in the lighting circuit relay combination and controlling the relays to be sucked up and fall down. The node relay combination is used for increasing the number of nodes in the pull-in annunciator, the track relay combination is used for restoring an outdoor lighting circuit of the pull-in annunciator, and a pull-in annunciator repeating lamp combination is further arranged in the pull-in annunciator and used for distinguishing the normal state of display equipment. According to the utility model, an intelligent system is adopted to carry out line breaking and line mixing on the ZPW2000R interval automatic block circuit and the pull-in signal machine circuit, so that the practical training drilling of the railway electric service field work area is convenient.

The invention discloses a line engineering quantity automatic generation method, system and device and a medium. The method comprises the steps of controlling an unmanned aerial vehicle to collect image data through a target power transmission line; extracting initial features of the image data through the target detection model, obtaining a power transmission line topological graph through the segmentation model based on the initial features, inputting the power transmission line topological graph into the graph neural network model, and obtaining key feature parameters of the power transmission line; and inputting the line key characteristic parameters into the engineering quantity calculation model, and automatically generating engineering quantity data of the target power transmission line. According to the method, manual field operation and manual calculation are greatly reduced, manual measurement and recording errors are avoided while the labor cost is reduced, and the accuracy of engineering quantity data is improved; unmanned aerial vehicle inspection replaces manual operation to enter a complex environment, so that the labor intensity is reduced, and the operation safety is improved; the automatic process shortens the engineering quantity calculation time, accelerates the early-stage preparation progress of the electric power engineering, and provides efficient support for engineering budget compilation and project promotion.

The utility model provides a crystallizer copper pipe die capable of adjusting the taper of an inner cavity on line, which relates to the technical field of crystallizers and comprises a tubular main body, at least one wall of the tubular main body is provided with a longitudinal groove, and the opening direction of the longitudinal groove is the outer surface of the tubular main body. The longitudinal groove is the same as the casting channel of the tubular main body in direction and is formed in the feeding end; the expansion pipe is arranged in the longitudinal groove, at least one end of the expansion pipe is provided with a combination connector, and the combination connector is detachably connected with a pressurizing pipeline. And variable field working conditions cannot be adapted. The technical problems of poor attachment degree of a casting blank and the inner wall of a crystallizer copper pipe mold, poor outward heat transfer of the casting blank, deterioration of the quality of a casting product, even cracking of the casting blank and leakage of a casting medium in the prior art are solved.

The utility model provides a kind of non-polarized electrode burying auxiliary device, the device includes positioning claw, connecting rod, damping hinged axle, extension rod;The bottom of the connecting rod is connected on the middle position of the upper surface of positioning claw by damping hinged axle, so that positioning claw can stay at any angle relative to connecting rod;The top of the connecting rod is provided with threaded interface, and is connected with extension rod by screw thread connection.The utility model of a kind of non-polarized electrode burying auxiliary device can adjust the angle transformation between auxiliary assembly and connecting rod by damping hinged axle, change the working mode of non-polarized electrode burying auxiliary device;Each component is detachably installed by screw thread, and it is convenient to carry and assemble in field work;Extension rod can be connected or disassembled according to the depth of electrode pit, convenient to use, overall structure is simple, easy to maintain, suitable for field electrical prospecting use.

The utility model discloses a multifunctional underground pipeline probe vehicle which comprises a cart body. The first storage tool box is arranged on the cart body and used for storing tools; the pipeline instrument equipment box is arranged on the first storage tool box, and underground pipeline detection equipment is stored in the pipeline instrument equipment box; the second vertically-placed storage tool box is arranged on the cart body, located on one side of the first storage tool box and used for storing rod tools. Detector equipment and tools are stored through modular partition design, storage boxes of the tools and the equipment are integrally arranged on the cart body, the equipment can be effectively protected against the influence of the external environment, meanwhile, the cart has the 360-degree steering capacity, and the cart can be flexibly pushed in narrow or uneven areas such as sidewalks, green belts and steps; the buffer protection structure causes damage to the instrument during transportation; the vehicle body is compact in structure and stable in gravity center and has bearing capacity and maneuverability. The convenience and safety of carrying and using the equipment are greatly improved, and the field work efficiency is improved.

The application discloses a gas parameter adjusting method for a reaction kettle and belongs to the field of high-temperature and high-pressure equipment control. The gas parameter adjusting method for the reaction kettle adjusts and controls the gas temperature and pressure in the control kettle and the reaction kettle through adjusting the gas booster and the heating belt, realizes two-stage accurate regulation and control of the gas temperature, pressure, concentration and other parameters before and after entering the kettle and real-time dynamic supplement, guarantees high consistency between the test working condition in the kettle and the field working condition; on the other hand, the application solves the problem that the gas composition and the proportioning accuracy in the reaction kettle are reduced due to the fact that the mixed gas formed by the reaction medium solution volatilization and the reaction gas under the simulated actual working condition cannot be realized in real time and accurately during the reaction gas proportioning process, thereby guaranteeing the high consistency between the test environment in the reaction kettle and the actual working condition and the reliability of the test result, and significantly improving the safety.

The 10kV switchgear maintenance platform car comprises a power grid control assembly and a temporary storage positioning assembly, a synchronous operation mechanism is arranged above the top of the power grid control assembly, and a clamping transfer mechanism installed in a sleeving mode is arranged on the inner side of one end of the synchronous operation mechanism; and a temporary storage positioning assembly is arranged below the other end of the synchronous operation mechanism. According to the device, an opening cabin, a spring set piece, an inner inserting rod, a concave-convex magnetic bar and a movable ball on the synchronous operation mechanism are mainly utilized to achieve a locking effect after output operation, and then the synchronous operation effect is achieved; and a gear, a second case, a threaded sleeve strip and a clamping plate on the upper temporary storage positioning assembly are matched to effectively achieve a locking effect, so that the situation that a circuit breaker switch is transported to a maintenance bracket by field maintenance personnel and then pushed to a turnover switch to disassemble a bottom plate is avoided, personnel safety risks caused by transportation and turnover of the switch are avoided, and the maintenance efficiency is improved. And the field work management level is improved.

To provide a field working machine hardly causing winding of seedlings, straws, etc.SOLUTION: The working vehicle includes a prime mover for generating power, a hydrostatic continuously variable transmission 45 having a hydraulic pressure pump to which the power from the prime mover is transmitted and a hydraulic motor for outputting the power, and a fan 46 connected to a shaft 45a part of either the hydraulic pressure pump or the hydraulic motor to generate cool air. The fan 46 includes a connecting portion side 45a connected to the shaft side 46A, a plurality of blade portion side 46A extending from the connecting portion side 45a outward in the radial direction around the shaft side 46B, and a frame portion side 46B connected to an outer peripheral portion of the plurality of blade portion side 46B and surrounding the plurality of blade portion side 46C from the outer peripheral side.SELECTED DRAWING: Figure 4