JP6557069B2 - Chemical sprayer - Google Patents

Description

  The present invention relates to a chemical sprayer, for example, a chemical sprayer that sprays chemicals on agricultural products using an axial blower disposed at the rear of a vehicle body.

  Conventionally, for example, a speed sprayer (described in Patent Document 1) is used as a chemical sprayer that sprays chemicals (agricultural chemicals such as control agents and water) on agricultural products such as fruits while traveling in a field such as an orchard. SS) is also known.

  In this speed sprayer, the chemical liquid in the chemical tank installed in the vehicle body is pumped by a pump to a nozzle disposed at the rear of the vehicle body, and the chemical liquid blown outward from the nozzle is disposed at the rear of the vehicle body. By spreading by the air flow blown outward from the blower, the spraying operation of the chemical solution is performed over a wide range while running in an agricultural field such as an orchard.

  More specifically, in the speed sprayer, usually, a pair of left and right front wheels and a rear wheel are arranged on the front and rear of the vehicle body so that the four wheels can be steered. In addition, a steering section provided with a driver's seat, a steering handle, and the like is provided at the front of the vehicle body, and a cylindrical wind tunnel having an axis along the longitudinal direction of the vehicle body at the rear of the vehicle body, the wind tunnel An axial-flow type blower comprising a fan (rotary blade) arranged with a fan shaft (rotating shaft) in the front-rear direction inside, a rectifying cylinder having a rectifying plate fixedly held in front of the fan in the wind tunnel, etc. A large number of spray nozzles are disposed along the circumferential direction of the air outlet that is provided and is formed of an arc-shaped opening in front of the wind tunnel. In addition, a semi-cylindrical chemical tank is installed horizontally (sideways) between the steering section of the vehicle body and the blower, and an engine room is provided in the engine room via a mission device, etc. Combined with driving for driving front wheels and rear wheels, for driving blowers for driving fans, and for driving auxiliary equipment for driving spraying pumps that supply chemical liquid in chemical liquid tanks to each spraying nozzle. In addition, internal combustion engines such as gasoline engines and diesel engines are accommodated.

  In such a speed sprayer, the chemical solution in the chemical solution tank is pumped to each spray nozzle by a spray pump driven by an internal combustion engine, and is sprayed radially from each spray nozzle to the upper side of the vehicle body and right and left outer sides ( Sprayed). At the same time, the air that has been sucked in through the air intake opening opened toward the rear of the vehicle body and passed through the wind tunnel due to the rotation of the fan driven by the internal combustion engine becomes a high-speed airflow from the air outlet, and above the vehicle body. It is discharged radially outward from left and right. Thereby, the mist-like chemical liquid sprayed from each spray nozzle is diffused more widely and farther toward the leaves of the tree and the like by the air flow discharged radially from the air outlet to the outside. . Therefore, the operator operates a steering handle or the like at the driver's seat of the vehicle body, and while running the speed sprayer in a field such as an orchard, by performing chemical spraying from the spray nozzle and blowing by the blower, It is possible to efficiently and reliably carry out the chemical solution spraying work in a vast field.

  In recent years, as a speed sprayer for reducing environmental impact, especially for fruit tree farmers in the suburbs of the city, with low pollution (low noise and low exhaust gas) in consideration of the surrounding environment, the power source is replaced by the above-mentioned internal combustion engine. Development of an electric speed sprayer that uses a motor and drives the electric motor using electric power stored in a battery to perform both running in the field and spraying chemicals to the crops in the field has been studied. Yes.

  By the way, in the speed sprayer as described above, in order to protect the internal parts such as the internal combustion engine mounted between the chemical liquid tank and the blower from the sprayed chemical liquid, rain wind, etc. And the sides are covered with a bonnet as a cover member. For this reason, heat generated from internal machine parts such as an internal combustion engine during traveling or chemical spraying work is likely to go inside the cover member (in other words, it is difficult for heat to be dissipated outside the cover member). The temperature of machine parts tends to rise. For example, as described above, an electric speed sprayer is equipped with an electric motor and a controller (control device) for controlling the electric motor as an internal machine component. Generally, the controller is provided with a protection circuit. When the temperature of the electric motor or controller rises above a predetermined threshold temperature during chemical spraying work, etc., the controller protection switch is turned on to forcibly suppress the output of the electric motor or stop the electric motor. As a result, the output required for the work cannot be maintained.

  With respect to such a problem, Patent Document 2 proposes a conventional technique for discharging high-temperature air in an engine room to the outside.

  In the conventional speed sprayer described in Patent Document 2, a cooling fan is disposed between an engine and a radiator disposed on the front side of the engine with its fan shaft directed in the front-rear direction, and the rotational power of the engine. The air is sucked from the front of the radiator and sent to the engine. In addition, the moving blade of the blower has a cylindrical hub and a plurality of blade portions integrally formed on the outer peripheral side of the hub, and is integrally formed on the inner periphery of the hub. And a plurality of exhaust heat blades inclined in the opposite direction. When the rotational power of the output shaft of the engine is transmitted to the rotor blade and the rotor blade rotates, the air behind the speed sprayer is sucked into the blower by the rotation of the blade portion of the rotor blade and sent to the jet head (exhaust vent). Then, the spray of the chemical liquid ejected from the nozzle disposed on the jet head is conveyed to the wind from the blower and scattered around. In addition, the blades for exhaust heat rotate with the rotation of the moving blades, thereby generating wind from the engine room toward the spinner (wind in the direction opposite to the blade), and high-temperature air in the engine room (cooling fan) The air that is sent from the front of the radiator toward the engine by the rotation of the radiator and absorbs the heat generated by the engine is forcibly sent to the concave side of the spinner, and the hub is rotated from the annular gap between the hub and the spinner. It is discharged to the outer peripheral side, merged with the air in the wing and sent to the jet head.

JP 2004-195395 A Utility Model Registration No. 2508315

  However, in the conventional technique described in Patent Document 2, since the cooling fan is disposed on the front side of the engine, the longitudinal length of the fuselage is inevitably increased, which may reduce traveling performance and operability. . In addition, since the engine to be cooled is interposed between the cooling fan and the blower arranged side by side in the front-rear direction, the flow of cooling air from the engine room to the spinner is obstructed, and the heat generated from the engine is absorbed. The cooling air stays inside a cover member such as a bonnet, and the cooling efficiency is lowered, and the load on the engine may be increased.

  The present invention has been made in view of the above-described problems, and the object thereof is, for example, above and on the side of an internal unit component disposed between a chemical tank and a spraying device having an axial blower. In the chemical spraying machine covered with a cover part such as a bonnet, the cooling air that absorbs the heat generated by the internal machine parts is efficiently discharged from the inside of the cover part to effectively cool the internal machine parts. It is in providing the chemical | medical solution spreader which can.

  In order to solve the above-described problems, a chemical liquid sprayer according to the present invention includes a chemical liquid tank for storing a chemical liquid, and an axial flow fan in which an axial fan and a rectifying cylinder are provided in a wind tunnel, A spraying device that discharges air sucked from the outside by rotation of the axial fan from an air outlet provided in the wind tunnel and sprays the chemical stored in the chemical tank toward the outside; An internal machine component that serves as a heat source and a cooling fan for cooling the internal machine component are disposed in front of the axial blower of the apparatus, and covers an upper side and a side of the internal machine component and the cooling fan, and a lower side is A chemical spreader provided with an open cover part, wherein at least part of the air sucked into the cover part through the lower opening of the cover part by rotation of the axial fan and the cooling fan, Flow around the internal parts Is not the directed in the axial direction of the rectifying cylinder while heat is endotherm the generated by internal machine parts, and characterized in that so as to discharge from the 吐風 port by flowed through the rectification in the body.

  In a preferred aspect, the cooling fan is disposed so as to be positioned closer to the axis of the rectifying cylinder than the internal machine component, and air that has absorbed heat generated by the internal machine component is sucked by the cooling fan to It was made to flow through the rectifying cylinder.

  In another preferred embodiment, the cooling fan is disposed below the internal machine component, and air that has absorbed heat generated by the internal machine component is blown downward by the cooling fan.

  In another preferred aspect, the internal unit component and the cooling fan are disposed between the chemical liquid tank disposed in the front-rear direction and the axial blower of the spraying device.

  The internal machine component preferably includes a controller that controls an electric motor as a drive source of the axial flow fan.

  According to the present invention, the rotation of the axial flow fan and the cooling fan of the axial flow blower causes at least the air sucked into the cover portion through the lower opening of the cover portion that covers the upper side and the side of the internal component and the cooling fan. A part of the airflow is passed around the internal machine parts to absorb the heat generated by the internal machine parts and directed toward the axial direction of the rectifier cylinder of the axial flow fan, and the rectifier cylinder is allowed to flow through the air outlet. Since the air is discharged from the inside, the cooling air that has absorbed the heat generated by the internal machine parts can be efficiently discharged from the cover part to the outside through the air outlet, without increasing the longitudinal length of the machine body. Can be cooled to.

  Further, the cooling fan is disposed closer to the axis of the rectifying cylinder than the inner machine part, and the rectifier cylinder sucks air that has absorbed heat generated in the inner machine part by the cooling fan. Since it is allowed to flow inside, the moisture and dust contained in the moist air can be prevented from adhering to the internal machine parts, and the internal machine parts are arranged outside the cooling fan. The maintainability can be ensured.

  In addition, the cooling fan is disposed below the internal machine component, and air that has absorbed heat generated by the internal machine component is blown downward by the cooling fan. Since it arrange | positions so that a downward opening may be opposed and the air volume (cooling air volume) of the said cooling fan can be ensured, the cooling efficiency of the said internal machine component can further be improved.

  Further, the internal unit parts and the cooling fan are arranged between the chemical solution tank arranged in the front-rear direction and the axial blower of the spraying device, that is, the chemical solution tank is arranged in the internal unit parts, the cooling fan, and the spraying device. Therefore, it is possible to collect and arrange the internal machine parts, improve the maintainability thereof, and suppress the influence of water droplets, condensation, moisture, etc. on the internal machine parts to be cooled.

The perspective view which shows one Embodiment of the chemical | medical solution spreader which concerns on this invention. It is a longitudinal cross-sectional view which follows the AA arrow line of the chemical | medical solution spreader shown in FIG. 1, and is a partially expanded longitudinal cross-sectional view which expands and shows the rear part. (A) is a partially enlarged exploded plan view showing the rear part of the chemical sprayer shown in FIG. 1 with the chemical tank and bonnet removed, and (B) is a further view of the controller and stay from (A). The figure which shows the state which removed. The longitudinal cross-sectional view which follows the BB arrow line of the chemical | medical solution spreader shown in FIG. The partially expanded longitudinal cross-sectional view which shows the other example of the chemical | medical solution spreader shown in FIG. The longitudinal cross-sectional view which shows the further another example of the chemical | medical solution spreader shown in FIG.

  Hereinafter, an embodiment of a chemical solution spreader according to the present invention will be described with reference to the drawings.

  In the following, mainly by driving the electric motor using the electric power stored in the battery, the chemical solution is sprayed from the spray nozzle and blown by the blower while running in a field such as an orchard. Thus, an electric speed sprayer that performs a chemical solution spraying operation over a wide range will be described. However, the present invention includes an internal combustion engine, a controller that controls the internal combustion engine (the operation state thereof), and the like as an internal machine component. Needless to say, the present invention can be applied to various chemical sprayers such as a speed sprayer that uses the internal combustion engine as a prime mover for driving a fan and driving accessories such as a fan and a spraying pump.

  Also, in this specification, expressions representing positions and directions such as “up and down”, “left and right”, and “front and back” are based on the traveling direction (traveling direction) of the vehicle body in order to avoid complicated explanation. Is defined as

  FIG. 1 is a perspective view showing an embodiment of a chemical sprayer (speed sprayer) according to the present invention, and FIG. 2 is a longitudinal sectional view taken along line AA of the chemical sprayer shown in FIG. FIG. 3 (A) is a partially enlarged exploded plan view showing the rear part of the state in which the chemical tank and the bonnet of the chemical spreader shown in FIG. 3B is a view showing a state in which the controller and the stay are further removed from FIG. 3A, and FIG. 4 is a longitudinal sectional view taken along the line B-B of the chemical solution spreader shown in FIG.

  The speed sprayer 1 of the illustrated embodiment includes a vehicle body 2 that is supported by a traveling device 3 and is capable of self-running, and a control unit for operating the speed sprayer 1 from the front side above the vehicle body 2. 10. A semi-cylindrical chemical liquid tank 20 for storing the chemical liquid, and a spraying device 30 for spraying (spraying) the chemical liquid stored in the chemical liquid tank 20 are mounted. Further, on the lower side of the chemical tank 20, a traveling electric motor 5 (see FIGS. 2 to 4) as a traveling drive source, a working machine motor 35 as a driving source for the spraying pump 31 of the spraying device 30 and the blower 33. (Refer to FIGS. 3 and 4), as a power source for the driving electric motor 5, the working machine electric motor 35, the controllers 5a and 35a for controlling the driving state of the running electric motor 5 and the working machine electric motor 35, etc. A battery 7 or the like is provided.

  The traveling device 3 mainly includes a pair of left and right front wheels 4a and 4a and rear wheels 4b and 4b attached to the front and rear portions of the vehicle body 2, and a transmission (transmission) 6 attached to the vehicle body 2 slightly behind. (See FIGS. 2 to 4), and the front wheel 4 a is steerable by receiving steering from a steering handle 12 provided in the steering unit 10. The transmission 6 is connected to a traveling electric motor 5 mounted on the vehicle body 2 on the upper side of the transmission 6, and the rotational driving force of the traveling electric motor 5 is transmitted through the transmission 6 to the front wheels 4 a and As a result, the speed sprayer 1 is configured to be a four-wheel drive in which both the front wheel 4a and the rear wheel 4b are driven by the power from the electric motor 5 for traveling, and from the steering handle 12. It is a four-wheel steering system that receives steering and directs the vehicle body 2 in the traveling direction.

  A driver's seat 11, a steering handle 12, and the like are disposed in the control unit 10, and various switches (for example, activation of the electric motor 5 for traveling and the motor 35 for work implements) are provided in the vicinity of the driver's seat 11. Switch), operation lever (for example, forward / reverse switching lever of the vehicle body 2), setting dial (for example, air volume setting dial of the blower 33, chemical liquid application amount setting dial, application pattern setting dial, etc.), accelerator pedal, brake pedal, A monitor for visualizing various states of the speed sprayer 1 (for example, the amount of air blown by the blower 33, the amount of chemical liquid sprayed, the amount of chemical liquid in the chemical liquid tank 20, the remaining amount of the battery 7, etc.) is provided. The operation information of the various switches by the worker is transmitted to the controllers 5a and 35a that control the driving state of the traveling electric motor 5 and the working machine electric motor 35 via a communication line (not shown) or via wireless communication. Sent.

  The spraying device 30 mounted on the rear part of the vehicle body 2 mainly includes a spraying pump 31 (see FIGS. 2 to 4), a plurality of spraying nozzles 32, a spraying pump 31 and a guide for connecting the spraying nozzles 32. A liquid pipe (not shown) and an axial flow blower (hereinafter simply referred to as a blower) 33 are included. The blower 33 is basically provided in the wind tunnel 33a, which has a cylindrical wind tunnel 33a having an axis L along the longitudinal direction of the vehicle body 2, as can be understood with reference to FIG. A straightening fan 33b and a straightening cylinder 33d having a straightening plate 33c, and a concave spinner 33e disposed behind the axial flow fan 33b. The axial fan 33b has a cylindrical hub 33f. A working fan 33g integrally formed on the outer peripheral side of the hub 33f, and an exhaust fan 33h integrally formed on the inner peripheral side of the hub 33f and inclined in the direction opposite to the working fan 33g. Have. Here, the wind tunnel 33a, the fan shaft of the axial fan 33b, and the rectifying drum 33d are concentrically arranged on the same axis L.

  The spraying pump 31 and the liquid guiding pipe are mounted on the vehicle body 2 to cover a space (above and side) formed between the chemical liquid tank 20 (rear surface) and the blower 33 of the spraying device 30. It is covered with a semi-cylindrical bonnet (cover part) 34. As can be understood with reference to FIGS. 3 and 4, the spray pump 31 (the input shaft thereof) and the blower 33 (the fan shaft of the axial fan 33b thereof) are wound around the pulley and the pulley, respectively. It is connected to the work machine electric motor 35 (power take-out shaft extending rearward thereof) via the transmission belts 36 and 37, and the spray pump 31 and the blower 33 are driven by the rotational driving force of the work electric motor 35. Thus, the chemical solution is automatically sprayed (sprayed) radially from each spray nozzle 32 toward the upper side of the vehicle body 2 and the left and right outwards.

  It should be noted that the spraying amount of the chemical liquid sprayed from each spraying nozzle 32 (that is, the chemical liquid amount sent from the spraying pump 31 to each spraying nozzle 32) and the blower amount of the blower 33 (that is, the axial flow fan 33b of the blower 33). The number of rotations) can be adjusted by an appropriate mechanism.

  The specific configuration of the above-described spraying device 30 is a conventionally known configuration except that the spraying pump 31 and the blower 33 (the axial fan 33b thereof) are driven by the electric motor 35 for the working machine instead of the internal combustion engine. Therefore, detailed description thereof is omitted here (see, for example, Patent Document 2).

  Controllers 5a and 35a for controlling the electric motor 5 for traveling and the electric motor 35 for work equipment are disposed between the chemical liquid tank 20 and the blower 33 of the spraying device 30, and the upper side and the side thereof are The lower side is covered by the semi-cylindrical bonnet 34 that is open. More specifically, as can be understood with reference to FIGS. 2 to 4, a travel controller 5 a for controlling the travel electric motor 5 and a work machine controller 35 a for controlling the work machine electric motor 35. Is mounted and fixed side by side in the left-right direction on the top surface 8a of the stay 8 attached to the vehicle body 2 so as to be positioned above the fan shaft of the axial fan 33b of the blower 33. In order to protect it from dust and dust, its periphery is covered with a substantially rectangular cover 9. Here, the work machine controller 35a is disposed so as to be located above the fan shaft of the axial fan 33b, and the traveling controller 5a is disposed on the right side thereof. The cover 9 may be provided with a vent for introducing air into the cover 9 on the side or upper surface of the cover 9 in order to increase the cooling efficiency of the work machine controller 35a by the cooling fan 38 described later.

  Further, in the present embodiment, in order to cool the work machine controller 35a, which increases the load during the chemical solution spraying work, the battery 7 is stored below the work machine controller 35a on the back side of the top plate 8a of the stay 8. A cooling fan 38 that is driven by using the generated electric power is attached with its fan shaft directed vertically (see FIG. 2). Although not shown, cooling fins for increasing the cooling efficiency by the cooling fan 38 are attached to the lower part of the work machine controller 35a so as to be exposed on the back side of the top plate 8a of the stay 8. Yes. The cooling fan 38 may be always driven when the speed sprayer 1 is used (during traveling, chemical solution spraying operation, etc.) so that the inside of the hood 34 is constantly ventilated, or the load of the work machine controller 35a. You may make it drive only at the time of the chemical | medical solution spraying operation | work which becomes large.

  In the speed sprayer 1 configured as described above, when the traveling electric motor 5 and the work machine electric motor 35 are driven using the electric power stored in the battery 7, the power from the traveling electric motor 5 is received. The front wheels 4a and the rear wheels 4b are driven (four-wheel drive), and the auxiliary machines such as the spray pump 31 and the blower 33 are driven by the power from the electric motor 35 for the work machine, and the controller for the work machine. A cooling fan 38 provided below 35a is driven to rotate. Due to the rotation of the axial fan 33b and the cooling fan 38 of the blower 33, external air is sucked into the bonnet 34 from below through the lower opening 34a of the bonnet 34 (arrow A1) and sucked into the hood 34. A part of the air rises through the side of the stay 8 on which the work machine controller 35a is placed, and flows around the cooling fins provided in the lower part of the work machine controller 35a (arrow A2). ) Absorbs heat generated by the work machine controller 35a. The air that has absorbed the heat generated by the work machine controller 35a is sucked by the cooling fan 38 provided adjacent to the lower side of the work machine controller 35a (the cooling fins thereof), and is directed downward from the cooling fan 38 to the wind tunnel. 33a (rectifying cylinder 33d) is blown toward the direction of the axis L (arrow A3), merges with the other part of the air sucked into the bonnet 34, and the rectifying cylinder 33d is rotated by the rotation of the exhaust fan 33h in the axial fan 33b. (Arrow A4). The air that has flowed through the rectifying cylinder 33d and exhausted backward from the exhaust fan 33h inside the hub 33f is discharged to the outer peripheral side of the hub 33f by the spinner 33e (arrow A5), and the axial fan 33b. The work fan 33g rotates to merge with the air sucked into the blower 33 from the rear of the blower 33, passes between the wind tunnel 33a and the rectifying drum 33d from the work fan 33g, and from the air outlet in front of the wind tunnel 33a. It is discharged radially (arrow A6). As a result, the mist-like chemical liquid sprayed from each spray nozzle 32 disposed at the air outlet is diffused to a wider range and farther away by the air flow discharged radially from the air outlet toward the outside. Therefore, the worker can efficiently perform the chemical solution spraying operation on the crops in the field while running the speed sprayer 1 in the field such as an orchard.

  In the speed sprayer 1 of the present embodiment, the cooling fan 38 is provided below the work machine controller 35a to be cooled, and the work machine controller 35a is rotated by the rotation of the axial fan 33b of the blower 33 and the cooling fan 38. At least a part of the air sucked into the bonnet 34 through the lower opening 34a of the bonnet 34 covering the upper side and the side of the cooling fan 38 is allowed to flow around the work machine controller 35a. Since the heat generated in the air is absorbed in the direction of the axis L of the rectifying cylinder 33d of the blower 33, and the inside of the rectifying cylinder 33d is passed through and discharged from the air outlet, the longitudinal length of the body (vehicle body) is increased. Without cooling, the cooling air that has absorbed the heat generated by the work machine controller 35a is passed from the bonnet 34 through the air outlet. Parts can be efficiently discharged, it is possible to effectively cool the working machine controller 35a. At that time, external air is taken into the inside of the vehicle body 2 through the lower opening 34a of the bonnet 34 from the lower side of the vehicle body 2 where the influence of the chemical solution sprayed from each spray nozzle 32 is small. It can also suppress that a chemical | medical solution adheres to the machine controller 35a.

  The cooling fan 38 is disposed closer to the axis L of the rectifying cylinder 33d than the work machine controller 35a, and the air absorbed by the work machine controller 35a is sucked by the cooling fan 38. Therefore, the moisture and dust contained in the moist air can be prevented from adhering to the work machine controller 35a, and the work machine controller 35a can be placed outside the cooling fan 38. Therefore, the maintainability of the work machine controller 35a can be ensured.

  Furthermore, the work machine controller 35a is disposed so as to be positioned above the axis L of the rectifying cylinder 33d, and the cooling fan 38 provided below the work machine controller 35a generates heat generated by the work machine controller 35a. Is positioned so as to blow air in the direction of the axis L of the rectifying cylinder 33d, so that the air that has absorbed the heat generated by the work machine controller 35a can be smoothly sent into the rectifying cylinder 33d. .

  In addition, the cooling fan 38 is disposed below the work machine controller 35a, and air that has absorbed heat generated by the work machine controller 35a is blown downward by the cooling fan 38. Is disposed so as to face the lower opening 34a of the bonnet 34, and the air volume (cooling air volume) of the cooling fan 38 can be secured, so that the cooling efficiency of the work machine controller 35a can be further increased.

  Furthermore, since the chemical tank 20 is separated from the internal machine parts such as the work machine controller 35a to be cooled, the cooling fan 38, and the spraying device 30, the chemical liquid tank 20 is arranged in front of it and can be collected and maintained. In addition to improving the performance, it is possible to suppress the influence of water droplets, condensation, moisture and the like on the internal machine parts such as the work machine controller 35a to be cooled.

  In the above embodiment, the cooling fan 38 is disposed below the work implement controller 35a to be cooled. For example, as shown in FIG. 5, the cooling fan 38 is disposed above the work implement controller 35a ( It is arranged at a position farther from the work machine controller 35a than the axis of the rectifying cylinder 33d, and the air blown downward from the cooling fan 38 by rotation of the cooling fan 38 (for example, through a vent formed on the upper surface of the cover 9). It is also possible to flow around the work machine controller 35a, absorb the heat generated by the work machine controller 35a, and send it into the rectifying cylinder 33d of the blower 33. Further, as shown in FIG. 6, the cooling fan 38 may be disposed on the side of the work machine controller 35a.

  In the above embodiment, the work machine controller 35a to be cooled is disposed above the fan shaft of the axial fan 33b. For example, the work machine controller 35a is disposed below the fan shaft of the axial fan 33b. Of course, the cooling fan 38 may be installed on the side and above, below, or on the side of the work machine controller 35a.

  Further, in the above embodiment, the work machine controller 35a for controlling the work machine electric motor 35 is a cooling object by the cooling fan 38, but the cooling object is not limited to the above-described internal machine parts, For example, a travel controller 5a for controlling the travel electric motor 5, an electric motor as a drive source (the work machine electric motor 35 or the travel electric motor 5), which is not used in the illustrated example, It goes without saying that any one or a plurality of various internal machine parts such as an internal combustion engine may be cooled.

  In the above-described embodiment, the semi-cylindrical bonnet (cover portion) 34 mounted on the vehicle body 2 is disposed above the internal machine parts disposed between the chemical liquid tank 20 and the blower 33 of the spraying device 30. Although the side is covered, for example, a part of the chemical tank 20 or the spraying device 30 may be protruded rearward or forward to cover the upper side and the side of the internal parts.

  Moreover, the specific structure of the control part 10 and the spraying apparatus 30 provided in the front part of the traveling apparatus 3 or the vehicle body 2, the shape of the chemical | medical solution tank 20, each component (the control part 10, the chemical | medical solution tank 20, the spraying apparatus 30, traveling) The arrangement configuration of the electric motor 5 such as the electric motor 5 for work and the electric motor 35 for work machine, and the controller 5a, 35a for controlling the electric motor 5 for traveling and the electric motor 35 for work machine, the battery 7 etc. is limited to the illustrated example. It goes without saying that modifications can be made as appropriate without departing from the concept of the present invention.

1 Speed sprayer (chemical sprayer)
2 Car body 3 Traveling device 4a Front wheel 4b Rear wheel 5 Traveling electric motor 5a Traveling controller 6 Transmission 7 Battery 8 Stay 8a Top plate 9 Cover 10 Steering part 11 Driver's seat 12 Steering handle 20 Chemical solution tank 30 Spraying device 31 Spraying Pump 32 Sprinkling nozzle 33 Axial flow blower 33a Wind tunnel 33b Axial fan 33c Rectifier plate 33d Rectifier drum 33e Spinner 33f Hub 33g Work fan 33h Exhaust fan 34 Bonnet (cover part)
34a Lower opening of bonnet 35 Electric motor 35a for work machine Controller 36, 37 for work machine Power transmission belt 38 Cooling fan

Claims (5)

It has a chemical tank for storing chemical liquid and an axial blower in which an axial fan and a rectifying cylinder are provided in the wind tunnel, and the wind tunnel is provided with air sucked from outside by the rotation of the axial fan And a spraying device for spraying the chemical stored in the chemical solution tank to the outside and discharged from the blower outlet, and an internal machine component serving as a heat source in front of the axial flow fan of the spraying device and the internal machine A cooling device for cooling a component is provided, a chemical spraying device provided with a cover portion that covers an upper side and a side of the inner device component and the cooling fan, and has an opening on the lower side,
Due to the rotation of the axial flow fan and the cooling fan, at least a part of the air sucked into the cover part through the lower opening of the cover part is caused to flow around the internal machine part so that the internal machine part Directing in the axial direction of the rectifying cylinder while absorbing the generated heat, and flowing through the rectifying cylinder to be discharged from the air outlet ,
The cooling fan is arranged so as to be positioned closer to the axis of the rectifying cylinder than the inner machine part, and the air that has absorbed heat generated by the inner machine part is sucked by the cooling fan into the rectifying cylinder. A chemical sprayer characterized by being allowed to flow . It has a chemical tank for storing chemical liquid and an axial blower in which an axial fan and a rectifying cylinder are provided in the wind tunnel, and the wind tunnel is provided with air sucked from outside by the rotation of the axial fan And a spraying device for spraying the chemical stored in the chemical solution tank to the outside and discharged from the blower outlet, and an internal machine component serving as a heat source in front of the axial flow fan of the spraying device and the internal machine A cooling device for cooling a component is provided, a chemical spraying device provided with a cover portion that covers an upper side and a side of the inner device component and the cooling fan, and has an opening on the lower side,
Due to the rotation of the axial flow fan and the cooling fan, at least a part of the air sucked into the cover part through the lower opening of the cover part is caused to flow around the internal machine part so that the internal machine part Directing in the axial direction of the rectifying cylinder while absorbing the generated heat, and flowing through the rectifying cylinder to be discharged from the air outlet ,
The said chemical | cooling fan is arrange | positioned under the said internal machine component, The air which absorbed the heat which generate | occur | produced in the said internal machine component was blown | fluctuated downward with the said cooling fan, The chemical | medical solution spreader characterized by the above-mentioned . The cooling fan is arranged so as to be positioned closer to the axis of the rectifying cylinder than the inner machine part, and the air that has absorbed heat generated by the inner machine part is sucked by the cooling fan into the rectifying cylinder. The chemical liquid sprayer according to claim 2 , wherein the chemical liquid sprayer is made to flow. Wherein the machine component and the cooling fan is one any of claims 1, characterized in that it is arranged between the axial-flow fan of the spraying device and the chemical tank deployed in the longitudinal direction 3 of the The chemical spreader according to Item . The chemical liquid sprayer according to any one of claims 1 to 4, wherein the internal component includes a controller that controls an electric motor as a drive source of the axial-flow fan.

Images