JP2016136884A - Chemical spreader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chemical spreader for performing a run in a farm field and for scattering a chemical liquid to the crop in a farm field by use of power stored in a battery, which can suppress the increases in a car height and a longitudinal length and in a weight center height and which is excellent in runnability or operability.SOLUTION: A chemical spreader comprises: a working electric-motor as a drive source of a scattering device 30; and a running electric motor 5 as a drive source of a running device 3. A battery 7 for feeding an electric power to an electric motor 35 for an implement electric-motor and the working electric-motor is so arranged that at least its portion is positioned on a lower side of a chemical tank 20.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a chemical sprayer, for example, a chemical sprayer that uses electric power stored in a battery to run in a field and spray chemicals to crops.

  Conventionally, as a chemical spraying machine 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, for example, the speed described in Patent Documents 1 to 4 Sprayers (also referred to as SS) are 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 fan consisting of a fan (rotor blade) arranged with the fan shaft (rotating shaft) facing in the front-rear direction, 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 formed by an arc-shaped opening in front of the trunk. 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. A gasoline engine that serves both as a driving drive for driving the front and rear wheels, a blower drive for driving a fan, and an auxiliary machine driving a spraying pump for supplying chemical liquid in a chemical tank to each spraying nozzle. And internal combustion engines such as diesel engines. That is, the internal combustion engine housed in the engine room functions as a driving motor for driving to drive the speed sprayer, and also functions as a driving motor for driving auxiliary machines such as a fan of a blower and a spraying pump.

  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 and outside the vehicle body. It is discharged radially. As a result, the sprayed chemical liquid sprayed from each spray nozzle is diffused more widely and farther toward the leaves of the tree or the like by the air flow discharged radially from the air outlet toward 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 the electric power stored in the battery to perform both running in the field and spraying chemicals to the crops in the field has been studied. ing.

JP 2011-205983 A JP 2007-31615 A JP 2004-195395 A Japanese Utility Model Publication No. 52-66680

  By the way, for example, the above-mentioned speed sprayer is a machine that performs a liquid medicine spraying operation while usually traveling between trees in an orchard or the like, so it is necessary to travel avoiding obstacles such as trees. It is required that the vehicle height is low and the front and rear length is short. Moreover, since it is necessary to prevent the fall during the movement between the garage and the field or during the chemical solution spraying work in the field, a low center of gravity is also desired.

  On the other hand, as described above, when an electric motor is used in place of the internal combustion engine, an electric motor for driving a fan with a large air volume and a spraying pump in particular is used to reliably perform a chemical spraying operation in a field. Therefore, in general, a large-capacity battery is required to drive the battery for a desired work time, and the physique and weight of the battery mounted on the vehicle body inevitably increase.

  However, in the conventional speed sprayers described in Patent Documents 1 to 4, a prime mover such as an internal combustion engine and a chemical tank are mounted side by side in the front-rear direction (the speed sprayers described in Patent Documents 1 to 3). Then, a chemical tank is mounted immediately after the control section, and an internal combustion engine is mounted immediately after the chemical tank. In the speed sprayer described in Patent Document 4, a prime mover is mounted immediately after the control section. Immediately after the chemical tank is installed). Therefore, in the case of configuring the above-described electric speed sprayer, if a large-capacity battery as described above is disposed at a position where a prime mover such as an internal combustion engine as described in Patent Documents 1 to 4 is disposed, There arises a problem that the height and the height of the center of gravity are increased and a problem that the longitudinal length is increased.

  Further, in such a chemical sprayer such as a speed sprayer, the amount of chemical in the chemical tank changes (decreases) every moment according to the spray amount. For this reason, for example, if the longitudinal length of the chemical solution tank is shortened and its vertical height is increased to shorten the longitudinal length of the chemical solution spreader, the center of gravity position of the chemical solution tank greatly changes in the vertical direction during the chemical solution dispersion operation. As a result, the position of the center of gravity of the chemical spreader greatly changes in the vertical direction, which causes a problem that the traveling performance or operability of the chemical spreader is lowered. Moreover, with the decrease in the amount of the chemical solution in the chemical solution tank as described above, there is a concern that the weight change (balance change) before and after the chemical solution spreader increases.

  The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to use an electric type that performs power in a field and sprays chemicals to farm products in the field using electric power stored in a battery. An object of the present invention is to provide a chemical spraying device that can suppress an increase in vehicle height, longitudinal length, and height of the center of gravity in a chemical spraying machine, and that is excellent in running performance or operability.

  In order to solve the above-described problems, a chemical sprayer according to the present invention is equipped with a chemical tank and a spraying device for spraying chemical stored in the chemical tank on the vehicle body, and the vehicle body is supported by the traveling device so as to be able to travel freely. In addition, a working machine motor as a drive source for the spraying device and a running motor as a drive source for the traveling device are provided, and the traveling device driven by the traveling motor can be self-propelled. A chemical sprayer that automatically sprays the chemical solution in the chemical solution tank by the spraying device driven by the working machine motor, the working machine motor and the traveling motor. One or a plurality of batteries for supplying electric power to each other are arranged such that at least a part thereof is positioned below the chemical liquid tank.

  In a preferred embodiment, the entire battery is located below the chemical tank.

  In another preferred embodiment, at least one of the working machine electric motor and the traveling electric motor is arranged to be positioned below the chemical liquid tank.

  In another preferred embodiment, at least one of the working machine motor and the traveling motor and the chemical tank are arranged at different positions in plan view.

  In another preferred embodiment, at least one of the working machine motor and the traveling motor and the battery are arranged at different positions in plan view.

  In another preferred embodiment, the working machine motor and the traveling motor are arranged at different positions in plan view.

  In another preferred embodiment, the traveling device includes wheels provided on the front and rear sides of the vehicle body, and a drive shaft extending in the front-rear direction of the vehicle body for transmitting the power of the electric motor for traveling to the wheels. The battery is arranged divided at least on the left and right of the drive shaft.

  In another preferred embodiment, one of the working machine motor and the traveling motor serves as the other of the working machine motor and the traveling motor, and the spraying device and the traveling apparatus are driven by the same motor. The

  In a further preferred form, the vehicle further includes a hydraulic power transmission device that transmits the power of the electric motor to the traveling device using hydraulic pressure.

  According to the present invention, at least a part (part or all) of a battery that supplies electric power to the working machine motor and the traveling motor is located below the chemical tank, and a relatively heavy battery is provided. Since it is placed under the relatively light chemical tank in the empty state, for example, compared with the case where the battery and chemical tank are arranged side by side in the front-rear direction, the increase in vehicle height, front-rear length, and center of gravity height are suppressed. be able to. In addition, by placing the chemical tank using the space above the battery, the chemical tank with a large weight change is formed relatively flat (that is, the front and rear length is increased or widened) and the weight is increased. Since it can arrange | position to the upper side of the battery which does not change, the change in the up-down direction and the front-back direction of the gravity center position of the chemical | medical solution tank during chemical | medical solution spraying work can be made small, and the runability or operativity of the said chemical sprayer can be improved.

  In addition, since at least one of the working machine motor and the traveling motor is disposed below the chemical tank, the relatively heavy motor is empty and disposed below the relatively lightweight chemical tank. Therefore, it is possible to further suppress the increase in the vehicle height, the longitudinal length, and the height of the center of gravity.

  In addition, even if at least one of the working machine motor and the traveling motor and the chemical tank are arranged at different positions in plan view, even if the working machine motor and the traveling motor are enlarged, Since at least one of the working machine motor and the traveling motor and the chemical tank can be appropriately arranged, an increase in the vehicle height, the longitudinal length, and the height of the center of gravity can be effectively suppressed.

  Furthermore, since at least one of the working machine motor and the traveling motor and the battery are arranged at different positions in plan view, the relatively heavy motor and the battery may be arranged in the vertical direction. Therefore, the increase in the vehicle height, the longitudinal length, and the height of the center of gravity can be further suppressed.

  Further, in this type of chemical spreader, for example, in order to realize all-wheel drive, a drive shaft that transmits the power (driving force) of the electric motor for traveling may be provided to the wheels provided before and after the vehicle body. . In such a case, the battery is divided and arranged at least on the left and right of the drive shaft, so that an increase in the vehicle height and the center of gravity can be effectively suppressed, and the balance between the left and right sides of the vehicle body is balanced. It can be maintained substantially evenly.

  In addition, one of the working machine motor and the traveling motor serves as the other of the working machine motor and the traveling motor, and the spraying device and the traveling device are driven by the same motor, whereby the motor mounted on the vehicle body In addition, since the number of connection lines connecting the motor and the battery can be reduced, the number of parts, weight, manufacturing cost, etc. of the chemical solution spreader can be remarkably suppressed.

  Furthermore, in that case, by further providing a hydraulic power transmission device that transmits the power of the electric motor to the traveling device using hydraulic pressure, for example, by changing the rotation speed of the blower according to the tree to be sprayed, the spraying time, etc. Even when the number of revolutions of the electric motor is changed when performing a chemical spraying operation, etc., the vehicle speed of the vehicle body driven by the traveling device can be adjusted steplessly and the desired speed can be maintained. Workability of the spraying work can be improved.

1 is a perspective view of Embodiment 1 of a chemical spreader according to the present invention. The left view of the chemical | medical solution spreader shown in FIG. The top view of the chemical | medical solution spreader shown in FIG. The disassembled left view which shows the state which removed the chemical | medical solution tank and covers of the chemical sprayer shown in FIG. The disassembled top view of the chemical | medical solution spreader shown in FIG. The decomposition | disassembly bottom view of the chemical | medical solution spreader shown in FIG. The left view which shows typically Embodiment 2 of the chemical | medical solution spreader which concerns on this invention. The top view of the chemical | medical solution spreader shown in FIG. The exploded plan view which shows the state which removed the chemical | medical solution tank of the chemical dispenser shown in FIG. The left view which shows typically Embodiment 3 of the chemical | medical solution spreader which concerns on this invention. FIG. 11 is a plan view of the chemical solution spreader shown in FIG. 10. The disassembled top view which shows the state which removed the chemical | medical solution tank of the chemical sprayer 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, a speed sprayer that performs a chemical spraying operation over a wide range by performing chemical spraying from a spray nozzle and blowing with a blower while traveling in an agricultural field such as an orchard will be described. The present invention comprises a plurality of spray nozzles provided along a longitudinal direction of a boom in a traveling process in a farm field such as a paddy field or a field, provided with a boom extending toward a side with respect to a traveling direction of a vehicle body. Various chemicals that spray chemicals such as pesticides and water to crops, such as boom sprayers that spray chemicals over a wide range corresponding to the boom length by spraying chemicals stored in chemical tanks Of course, it can be applied to a spreader.

  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

[Embodiment 1]
FIGS. 1 to 3 are a perspective view, a left side view, and a plan view, respectively, of Embodiment 1 of a chemical solution spreader (speed sprayer) according to the present invention. 4 to 6 are an exploded left side view, an exploded plan view, and an exploded bottom view, respectively, illustrating a state in which the chemical tank and the covers of the chemical dispenser shown in FIG. 1 are removed.

  A speed sprayer 1 shown in the figure basically has a vehicle body 2 that is long in the front-rear direction, and the vehicle body 2 is supported by a traveling device 3 so as to be able to travel. As is well understood with reference to FIG. 6, the traveling device 3 mainly includes a pair of left and right front wheels 4a, 4a attached to the front portion of the vehicle body 2 via a front axle 6a, and a little of the vehicle body 2. A transmission (transmission) 6c attached to the rear, a pair of left and right rear wheels 4b, 4b attached to a rear portion of the transmission 6c via a rear axle 6b provided integrally with the transmission 6c, The propeller shaft (drive shaft) 6d extends forward from the transmission 6c and interlocks and connects the transmission 6c and the front axle 6a. The front wheel 4a is a steering provided in the steering unit 10 described later. Steering from the steering wheel 12 is possible. The transmission 6c is connected to a traveling electric motor (electric motor) 5 (see FIG. 5) as a traveling drive source mounted on the vehicle body 2 on the upper side of the transmission 6c, and rotation of the traveling electric motor 5 is performed. The driving force is transmitted to the rear wheel 4b through the transmission 6c and the rear axle 6b, and is transmitted to the front wheel 4a through the transmission 6c, the propeller shaft 6d, and the front axle 6a. As a result, the speed sprayer 1 is a four-wheel drive in which both the front wheels 4a and the rear wheels 4b are driven by the power from the electric motor 5 for traveling, and receives the steering from the steering handle 12 to It is a four-wheel steering system that points in the direction of travel. The traveling electric motor 5, the transmission 6c, and the propeller shaft 6d are arranged side by side in the front-rear direction at a substantially central portion on the left and right sides of the vehicle body 2 (speed sprayer 1).

  As shown in FIG. 1, the self-propelled speed sprayer 1 according to the present embodiment basically operates the speed sprayer 1 at the front portion of the vehicle body 2 and in front of the front wheels 4a. And a spraying device 30 for spraying (spraying) a chemical solution is mounted on the rear side of the vehicle body 2 and on the rear side of the rear wheel 4b, and between the control unit 10 and the spraying device 30. A chemical solution tank 20 for storing a chemical solution sprayed from the spraying device 30 is mounted in an intermediate portion between the front wheel 4a and the rear wheel 4b. Further, as can be understood with reference to FIG. 3 and FIG. 5, below the chemical tank 20, the traveling electric motor 5 as a traveling drive source, the spraying pump 31 of the spraying device 30 and the blower 33 are provided. A work machine motor 35 as a drive source, a traveling electric motor 5, a battery 7 as a power source for the work machine electric motor 35, and the like are provided.

  A driver's seat 11, a steering handle 12, and the like are disposed in the control unit 10, and various switches (for example, electric motors for traveling) are provided in the vicinity of the driver's seat 11 (in the illustrated example, in front of the left side and in front). Start switch of the motor 5 and the work machine motor 35), an operation lever (for example, a forward / reverse switching lever of the vehicle body 2, etc.), a setting dial (for example, an air volume setting dial of the blower 33, a chemical spray amount setting dial, a spray pattern setting) Dial, etc.), accelerator pedal, brake pedal, and various states of the speed sprayer 1 (for example, the amount of air blown by the blower 33, the amount of chemical solution sprayed, the amount of chemical solution in the chemical solution tank 20, the remaining amount of the battery 7, etc.) A monitor is provided for this purpose.

  Further, the spraying device 30 mounted on the rear part of the vehicle body 2 mainly includes a spraying pump 31 (see FIG. 5), a plurality of spraying nozzles 32, and a spraying pump disposed above the right rear wheel 4b. 31 and a spray pipe (not shown) for connecting the spray nozzles 32 and an axial flow blower 33. The spray pump 31 and the liquid guide pipe are semi-cylindrical and made of synthetic resin. Covered by a cover 34. As can be understood with reference to FIGS. 5 and 6, the spraying pump 31 (the input shaft thereof) and the blower 33 (the fan shaft of the fan thereof) are respectively provided with a pulley and a transmission belt 36 wound around the pulley. 37, 37 is connected to a working machine electric motor 35 (power take-off shaft extending rearward), and the spraying pump 31 and the blower 33 are driven by the rotational driving force of the working electric motor 35. The chemical solution is automatically sprayed (sprayed) radially from the spray nozzle 32 toward the upper side of the vehicle body 2 and the left and right outer sides.

  It should be noted that the spray amount of the chemical liquid sprayed from each spray nozzle 32 (that is, the chemical liquid amount sent from the spray pump 31 to each spray nozzle 32) and the air flow rate of the blower 33 (that is, the rotational speed of the fan of the blower 33). Can be adjusted by an appropriate mechanism (see, for example, Patent Document 2), and a control device (not shown) for controlling the dial 11 by an operator of the driver's seat 11 is provided in the cover 34. Built in.

  The specific configuration of the spraying device 30 is a conventionally known configuration except that the spraying pump 31 and the blower 33 (the fan thereof) are driven by an electric motor 35 for the working machine instead of the internal combustion engine. Here, the detailed description is omitted (for example, refer to Patent Documents 1 to 4).

  A chemical tank 20 installed between the control unit 10 and the spraying device 30 is basically a semi-cylindrical tank body 21 made of a synthetic resin that is long in the front-rear direction, and a substantially central portion of the ceiling of the tank body 21. It is comprised from the cover body 23 attached to the formed inlet so that opening and closing was possible. The left side portion of the front surface of the tank body 21 extends to the left side of the driver seat 11 of the control unit 10. Further, a substantially rectangular recess 22 (not shown in the right side surface) for accommodating the battery 7 is formed on the lower side of the center in the front-rear direction on both the left and right side surfaces of the tank body 21.

  The battery 7 has a two-part configuration including a left battery 7a and a right battery 7b each having a substantially rectangular shape, and the batteries 7a and 7b are placed under the depressions 22a and 22b via holding members attached to the vehicle body 2. It arrange | positions so that it may be accommodated in the side (namely, it may not protrude from the right and left most part of the chemical | medical solution tank 20). The batteries 7a and 7b have the same weight and extend to the lower side of the propeller shaft 6d provided below the vehicle body 2, and are arranged substantially symmetrically with the propeller shaft 6d interposed therebetween. In other words, the battery 7 is disposed at an intermediate position (in the front-rear direction) between the front wheel 4a and the rear wheel 4b and substantially symmetrical with respect to a center line extending in the front-rear direction of the vehicle body 2, and is combined with other components. Thus, the front, rear, left and right wheels (front wheels 4a, 4a and rear wheels 4b, 4b) are substantially equally loaded.

  The battery 7 (each battery 7a, 7b) is connected to the electric motor 5 for traveling, the electric motor 35 for working machine, the electric motor 5 for traveling, and the electric motor 35 for working machine via a connection line (not shown). It is connected to a motor control unit (not shown) that controls the driving state. The battery 7 (each of the batteries 7a and 7b) is specifically a battery module in which a plurality of battery cells are modularized, and the voltage, current, temperature, etc. of the battery module are measured to monitor the input / output of the battery. A battery control unit (BCU) that performs cooling management, monitoring of a high-voltage safety circuit, etc., an electric motor for traveling 5 and an electric motor for work equipment 35 connected to each battery module, a wiring cable connected to the motor control unit, a battery It is composed of a service plug or the like that cuts off the high voltage when the battery is attached and detached so that the work can be performed safely, and is housed in a resin case, for example.

  Here, examples of the battery 7 that can be applied in the present embodiment include a primary battery, a secondary battery, and a fuel cell. Particularly, a secondary battery and a fuel cell that can be charged and used repeatedly are preferable. Secondary batteries include nickel-cadmium (nickel cadmium) batteries, nickel-metal hydride batteries, nickel-zinc storage batteries, nickel-iron storage batteries, lithium ion batteries, lithium ion polymer batteries, lead storage batteries, alkaline storage batteries, and the like. In the present embodiment, in order to charge the battery 7, a charging plug 8 connected to a household power source or a charger is disposed on the left side of the driver's seat 11 of the control unit 10.

  As is well understood with reference to FIGS. 4 and 5, the traveling electric motor 5 and the working machine electric motor 35 are located below the rear part of the chemical tank 20 and between the rear wheels 4 b. It is deployed side by side in the left-right direction. More specifically, the traveling electric motor 5 is disposed in the left and right central portion of the vehicle body 2 with its power take-off shaft (rotating shaft) facing forward, and the work machine electric motor 35 is disposed in the left and right central portion of the vehicle body 2. The power take-out shaft (rotary shaft) is disposed rearward at a position slightly deviated to the left (that is, the left side of the traveling electric motor 5) and slightly higher than the traveling electric motor 5. .

  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 respective batteries 7a and 7b), the traveling spray motor 1 The front wheel 4a and the rear wheel 4b are driven (four-wheel drive) by receiving power from the electric motor 5, and the auxiliary machines such as the spraying pump 31 and the blower 33 are receiving power from the work machine electric motor 35. Is driven, and the operator 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. Further, when the remaining amount of the battery 7 is reduced, the battery 7 is charged via the charging plug 8, so that the traveling in the field such as an orchard and the chemical spraying operation for the farm products in the field can be performed again. It can be performed.

  As can be seen from the above description, according to the speed sprayer 1 of the first embodiment, the battery 7 that supplies electric power to the working machine electric motor 35 and the traveling electric motor 5 is positioned below the chemical tank 20. Since the battery 7 having a relatively large weight is disposed under the relatively light chemical liquid tank 20 in an empty state, for example, the battery and the chemical liquid tank are arranged side by side in the front-rear direction. Thus, increase in vehicle height, front-rear length, and center of gravity height can be suppressed. In addition, by arranging the chemical tank 20 using the space above the battery 7, the chemical tank 20 having a large weight change can be arranged on the upper side of the battery 7 with no weight change after being formed relatively flat. The change in the center of gravity of the chemical tank 20 during the chemical spraying operation in the vertical direction and the front-rear direction can be reduced, and the traveling performance or operability of the speed sprayer (chemical sprayer) 1 can be improved. The load applied to the wheels (that is, wheel pressure and tire pressure) can be made uniform.

  In addition, since both the work machine electric motor 35 and the travel electric motor 5 are disposed below the chemical tank 20, the relatively heavy electric motors 35 and 5 are empty and relatively light chemicals. Since it is arrange | positioned under the tank 20, the increase in a vehicle height, front-back length, and a gravity center height can further be suppressed.

  Further, since both the electric motor 35 for work implements and the electric motor 5 for traveling and the battery 7 are arranged at different positions in the front-rear direction in plan view, the electric motors 35 and 5 and the battery 7 having relatively large weights are arranged. Are not arranged side by side in the up-down direction, so that increases in vehicle height, front-rear length, and center of gravity height can be further suppressed.

  Further, the battery 7 is divided and arranged on the left and right of the propeller shaft 6d that transmits the power (driving force) of the traveling electric motor 5 to the wheels (front wheel 4a and rear wheel 4b) provided in the front and rear of the vehicle body 2. As a result, an increase in the vehicle height and the height of the center of gravity can be effectively suppressed, and the left and right balance of the vehicle body 2 can be maintained substantially evenly.

[Embodiment 2]
FIGS. 7 and 8 are a left side view and a plan view, respectively, of the second embodiment of the chemical sprayer (speed sprayer) according to the present invention, and FIG. 9 shows the chemical tank 20A of the chemical sprayer 1A shown in FIG. It is a top view which shows the state removed.

  The chemical solution spreader (speed sprayer) of the second embodiment is different from the above-described chemical solution spreader (speed sprayer) of the first embodiment mainly in the configuration of the traveling device and the arrangement of the components. Yes. In the following, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The traveling device 3A of the speed sprayer 1A of Embodiment 2 mainly includes a pair of left and right front wheels 4aA and 4aA attached to the front portion of the vehicle body 2A via a front axle (not shown), and a central portion of the vehicle body 2A. An attached transmission 6cA, a pair of left and right rear wheels 4bA and 4bA attached to the rear part of the vehicle body 2A via a rear axle 6bA, and the transmission 6cA and the front extending from the transmission 6cA in the front-rear direction. A propeller shaft (drive shaft) 6dA that interlocks and connects the axle and the rear axle 6bA. As can be understood with reference to FIGS. 8 and 9, the transmission 6 c </ i> A is mounted on the rear side of the transmission 6 c </ i> A and the left side of the propeller shaft 6 d </ i> A (with its power take-out shaft facing forward). It is connected to a traveling electric motor (electric motor) 5A as a drive source, and the rotational driving force of the traveling electric motor 5A is transmitted to the rear wheel 4bA via the transmission 6cA, the propeller shaft 6dA, and the rear axle 6bA. At the same time, it is transmitted to the front wheel 4aA via the transmission 6cA, the propeller shaft 6dA, and the front axle. As a result, the speed sprayer 1A is a four-wheel drive in which both the front wheels 4aA and the rear wheels 4bA are driven by the power from the traveling electric motor 5A, as in the first embodiment.

  The chemical tank 20A (the tank main body 21A) installed between the control unit 10A and the spraying device 30A is slightly shorter in the front-rear direction than the chemical liquid tank 20 (the tank main body 21) in the first embodiment. The battery 7A having a substantially rectangular shape is provided via a holding member attached to the vehicle body 2A below the left side portion. The traveling electric motor 5A is arranged on the inner side of the battery 7A (below the chemical tank 20A) and near the center in the left-right direction on the rear side of the chemical tank 20A (with its power take-out shaft at the rear A working machine electric motor 35A is provided.

  As described above, according to the speed sprayer 1A of the second embodiment, the traveling electric motor 5A is arranged so as to be positioned below the chemical liquid tank 20A, and the work machine electric motor 35A and the chemical liquid tank 20A are viewed in plan view. The electric motor for the work machine (the electric motor for driving the auxiliary machines such as the spraying pump 31A of the spraying device 30A and the blower 33A) which can be relatively large by being disposed at different positions in the front-rear direction. Can be appropriately arranged, and therefore, an increase in vehicle height, longitudinal length, and center of gravity height can be effectively suppressed. Further, since the working machine electric motor 35A is disposed so as to be exposed from the chemical tank 20A with respect to the above-described first embodiment, the maintainability of the working machine electric motor 35A can be improved.

[Embodiment 3]
10 and 11 are a left side view and a plan view, respectively, of the third embodiment of the chemical sprayer (speed sprayer) according to the present invention, and FIG. 12 shows the chemical tank 20B of the chemical sprayer 1B shown in FIG. It is a top view which shows the state removed.

  In the chemical sprayer (speed sprayer) of the third embodiment, the working machine electric motor also serves as the traveling electric motor, compared to the above-described chemical sprayer (speed sprayer) of the second embodiment (hereinafter, referred to as “traveling motor”). This dual-purpose electric motor is simply referred to as an electric motor), and is different in that both the running in the field and the chemical spraying operation for the crops in the field are performed by the power of the electric motor. In the following, the same components as those of the second embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The traveling device 3B of the speed sprayer 1B of Embodiment 3 mainly includes a pair of left and right front wheels 4aB and 4aB attached to the front portion of the vehicle body 2B via a front axle (not shown), and a central portion of the vehicle body 2B. An attached transmission 6cB, a pair of left and right rear wheels 4bB and 4bB attached to the rear part of the vehicle body 2B via a rear axle 6bB, and the transmission 6cB and the front extending from the transmission 6cB in the front-rear direction. A propeller shaft (drive shaft) 6dB for interlockingly connecting the axle and the rear axle 6bB, and an HST (Hydraulic Static Transmission, hydrostatic continuously variable transmission) 6eB as a hydraulic power transmission device directly connected to the rear part of the transmission 6cB And is composed of. A power take-off shaft (rotary shaft) is provided at the front and rear of the electric motor 35B that serves both as a traveling drive source and a chemical solution spraying drive source disposed behind the HST 6eB and in the vicinity of the center in the left-right direction on the rear side of the chemical solution tank 20B. The HST 6eB (input shaft thereof) is connected to a power take-out shaft that protrudes forward of the electric motor 35B via a pulley and a transmission belt 9B wound around the pulley. The rotational driving force of the electric motor 35B is transmitted to the rear wheel 4bB via the HST 6eB, the transmission 6cB, the propeller shaft 6dB, and the rear axle 6bB, and is transmitted to the HST 6eB, the transmission 6cB, the propeller shaft 6dB, and the front axle. To the front wheel 4aB. Accordingly, the speed sprayer 1B is a four-wheel drive in which both the front wheels 4aB and the rear wheels 4bB are driven by the power from the electric motor 35B, as in the first and second embodiments.

  In addition, the power take-out shaft that protrudes toward the rear of the electric motor 35B is sprayed on the right side of the electric motor 35B via pulleys and transmission belts 36B and 37B as in the second embodiment. The pump 31B (the input shaft thereof) and the blower 33B (the fan shaft of the fan) disposed behind the electric motor 35B are connected.

  As described above, according to the speed sprayer 1B of the third embodiment, one of the working machine electric motor and the traveling electric motor serves as the other of the working machine electric motor and the traveling electric motor (in the illustrated example, The working machine electric motor 35B also serves as the traveling electric motor 5B), and the spraying device 30B and the traveling device 3B are driven by the same electric motor 35B. Since the number of connection lines connecting the battery can be reduced, the number of parts, weight, manufacturing cost, and the like of the speed sprayer (chemical sprayer) 1B can be significantly reduced.

  Furthermore, in that case, by further providing HST6eB as a hydraulic power transmission device that transmits the power of the electric motor 35B to the traveling device 3B using hydraulic pressure, for example, according to the trees to be sprayed, the spraying time, etc. Even when the rotational speed of the electric motor 35B is changed when changing the rotational speed and performing a chemical solution spraying operation, the vehicle speed of the vehicle body 2B driven by the traveling device 3B can be adjusted steplessly, and a desired speed can be maintained. Therefore, the workability of the chemical solution spraying work in an agricultural field such as an orchard can be improved.

  In addition, since the electric motor 35B and the chemical liquid tank 20B are arranged at different positions in the front-rear direction in plan view, the electric motor 35B that can be relatively large can be properly arranged, so that the vehicle height, front-rear length, center of gravity The increase in height can be effectively suppressed and the maintainability of the electric motor 35B can be improved.

  In Embodiments 1 to 3 described above, four wheels provided on the front, rear, left and right are driven by the power of the electric motor as a traveling device in order to ensure traveling performance on uneven ground, sloping ground or the like in the field. Four-wheel drive (that is, all-wheel drive) is adopted, but the traveling device is arranged so that the load (that is, wheel pressure and tire pressure) applied to the wheels is substantially uniform, for example, Of course, it may be three wheels or more than five wheels, and may not be all-wheel drive. In the first to third embodiments described above, the four-wheel steering (that is, all-wheel steering) method is adopted. However, for example, a front wheel steering method may be used. Moreover, it cannot be overemphasized that it may replace with a wheel type, and the crawler type which extended a pair of left and right traveling crawlers on the lower part of the vehicle body.

  Moreover, in above-mentioned Embodiment 1-3, although the open type is employ | adopted as a control part provided in the front part of the vehicle body, for example, the cabin which prevents an operator's chemical exposure and contact with a tree branch Of course, it may be of a type (see, for example, Patent Document 3).

  In Embodiments 1 to 3 described above, in order to efficiently use the electric power stored in the battery, the battery or the left battery and the right battery constituting the battery are respectively connected to the electric motor for traveling and the electric motor for working machine. For example, in order to simplify the device configuration, the traveling electric motor and the work machine electric motor are connected to separate batteries, and the traveling device and the spraying device are respectively connected to separate drive sources. Of course, it may be driven by.

  Furthermore, in the above-described first to third embodiments, the arrangement configuration of the spraying device, the chemical solution tank, the electric motor such as the traveling electric motor and the working machine electric motor, the battery, and the like is an example, and deviates from the concept of the present invention. Needless to say, the arrangement can be changed to the definition.

1 Speed sprayer (chemical sprayer)
2 Car body 3 Travel device 4a Front wheel
4b Rear wheel (wheel)
5 Electric motor for driving (electric motor)
6a Front axle 6b Rear axle 6c Transmission 6d Propeller shaft (drive shaft)
7 Battery 7a Left battery 7b Right battery 8 Charging plug 10 Steering part 11 Driver's seat 12 Steering handle 20 Chemical liquid tank 21 Tank body 22 Recess 23 Lid 30 Spraying device 31 Spraying pump 32 Spraying nozzle 33 Blower 34 Cover 35 Electric for work machine Motor (electric motor)
36, 37 Transmission belt

Claims (9)

The vehicle body is equipped with a chemical liquid tank and a spraying device for spraying the chemical liquid stored in the chemical liquid tank, and the vehicle body is supported by the traveling device so as to be able to travel, and the working machine electric motor as a drive source of the spraying device, A traveling motor as a driving source of the traveling device, and is capable of self-running by the traveling device driven by the traveling motor, and the chemical solution by the spraying device driven by the working machine motor. A chemical sprayer that automatically sprays the chemical in the tank,
The one or more batteries that supply electric power to the working machine motor and the traveling motor are arranged so that at least a part thereof is positioned below the chemical tank. Spreader.   The chemical solution sprayer according to claim 1, wherein the whole of the battery is located below the chemical solution tank.   3. The chemical solution sprayer according to claim 1, wherein at least one of the working machine motor and the traveling motor is arranged to be positioned below the chemical tank. 4.   4. The chemical spreader according to claim 1, wherein at least one of the electric motor for work machine and the electric motor for traveling and the chemical liquid tank are arranged at different positions in plan view. 5.   5. The chemical spreader according to claim 1, wherein at least one of the working machine motor and the traveling motor and the battery are arranged at different positions in plan view.   The chemical liquid sprayer according to any one of claims 1 to 5, wherein the working machine motor and the traveling motor are arranged at different positions in plan view. The traveling device includes wheels provided on the front and rear sides of the vehicle body, and a drive shaft extending in the front-rear direction of the vehicle body for transmitting the power of the traveling motor to the wheels.
The chemical battery sprayer according to any one of claims 1 to 6, wherein the battery is divided and arranged at least on the left and right of the drive shaft.   One of the working machine motor and the traveling motor serves as the other of the working machine motor and the traveling motor, and the spraying device and the traveling device are driven by the same motor. The chemical | medical solution spreader in any one of Claim 1 to 7.   9. The chemical sprayer according to claim 8, further comprising a hydraulic power transmission device that transmits power of the electric motor to the traveling device using hydraulic pressure.

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