JP3276946B2 - Agricultural chemical sprayer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an agricultural chemical sprayer.

[0002]

2. Description of the Related Art Conventionally, there is an agricultural chemical sprayer equipped with a rear engine as shown in FIG. In this agricultural chemical spraying vehicle, as a basic form, an engine in which the radiator 20 and the lower surface 23a of the oil pan 23 are located below the lower surface 20a of the radiator 20 from the front side to the rear side from the steering unit 10 A main body 22 and a first transmission 24 for transmitting power for running and agricultural chemical spraying are arranged in this order. The radiator 20 is fixed at a position as high as possible in the engine room 14 in order to avoid the rolled-up dust from covering the heat exchange fins as much as possible and to maintain a high cooling efficiency. Are located. In addition, the engine body 22 is heavy and is fixed at a low position to improve vehicle stability and balance.
Are located. As a result, the radiator 20 protruding forward and the engine body 22 (oil pan 2
3 inclusive) in a substantially inverted L-shape.

[0003] A clutch 30 and a second transmission 40 are provided in a space below the chemical solution tank 12 in which the agricultural chemical is stored. The clutch 30
Receives power from the first transmission 24 via the engine power transmission shaft 26 to transmit power for traveling, and the second transmission 40 receives power from the clutch 30 and transmits power for traveling. The second transmission 40 includes a rear-wheel drive propeller shaft 6.
4 is connected to a rear differential axle 50 located at the rear. The rear wheel drive propeller shaft 64 is connected to the universal joint 55,
55. Further, a rear differential axle 50 is provided below the engine body. Reference numeral 57 denotes a front-wheel drive propeller shaft, and reference numeral 58 denotes a front-wheel differential, which is connected by a universal joint 55. The agricultural chemical sprayer is a four-wheel drive.

[0004]

However, in the conventional agricultural chemical spraying vehicle, the clutch 30 and the second transmission 40 are disposed in the space below the chemical liquid tank 12 so as to avoid interference, so that the lower part of the chemical liquid tank 12 is prevented. Lower surface 12a
Side) is restricted. That is, the lower surface 12a of the chemical solution tank 12 cannot be provided below a predetermined level, and in order to obtain a required tank volume, the chemical solution tank 1
2 had to be formed longer in the vehicle length direction. For this reason, as a result, the vehicle length (total length) of the agricultural chemical spraying vehicle becomes long, and there is a problem that it is not possible to further reduce the turning radius (improve mobility with small turning). Further, in the conventional agricultural chemical sprayer, since the second transmission 40 and the rear differential axle 50 are connected by the rear wheel drive propeller shaft 64, the number of parts is large, the configuration is complicated, and as a result, the manufacturing cost is increased. There was a problem that it could not be reduced.

[0005] It is an object of the present invention to reduce the vehicle length by improving the arrangement of the engine drive mechanism, improve the driving performance, and reduce the manufacturing cost by simplifying the structure. The object of the present invention is to provide a medicine spraying vehicle.

[0006]

The present invention has the following arrangement to achieve the above object. That is, the agricultural chemical sprayer according to the present invention includes a radiator, a lower portion of the radiator, and a lower surface of the radiator, from the front side to the rear side of the control section and the chemical liquid tank disposed behind the control section. In a rear-engine-mounted agricultural chemical spraying vehicle arranged in the order of an engine body on which the lower surface of the pan is located, and a first transmission for transmitting power for traveling and agricultural chemical spraying, the oil is disposed below the radiator. In a space in front of the pan, a clutch that receives power from the first transmission via an engine power transmission shaft and transmits power for traveling, and a second transmission are arranged in parallel, and a clutch is disposed behind the second transmission. A rear differential axle is directly connected and disposed below the engine body.

[0007] Further, since the respective components of the clutch, the second transmission, and the rear differential axle are stored in respective storage spaces of a case integrally formed with a case frame, a power transmission mechanism is provided. Can be suitably provided in a compact form, and the number of parts can be reduced to reduce the manufacturing cost.

[0008] A liquid containing a gear for transmitting power to the second transmission via a main drive shaft which is coupled to the clutch and an open-to-atmosphere space of the case containing the clutch. A liquid-tight surface used for mounting the inner case cover to the case frame in a liquid-tight manner and a gear for transmitting power to the second transmission are housed in the case in a sealed state so as to isolate a tight space. Therefore, since the outer case cover and the liquid-tight surface used for mounting the outer case cover to the case frame in a liquid-tight manner are formed on one and the same plane in the case frame, it can be easily manufactured. And manufacturing costs can be reduced.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a side view for explaining an embodiment of an agricultural chemical sprayer according to the present invention. In order to explain the positional relationship, the configuration of a main part is partially shown in a transparent manner. FIG. 2 is a side view showing a main part of the embodiment of FIG. FIG. 3 is a plan view showing a main part of the embodiment of FIG. FIG. 4 is a front view showing a main part of the embodiment of FIG. FIG. 5 is a rear view showing a main part of the embodiment of FIG.

This embodiment is an agricultural chemical spraying vehicle equipped with a rear engine, which is located rearward from the front and rear of the control unit 10 and a chemical solution tank 12 disposed behind the control unit 10. , A radiator 20, an engine body 22 in which the lower surface 23a of the oil pan 23 is located below the lower surface 20a of the radiator 20, and a first transmission 24 for transmitting power for running and spraying agricultural chemicals. . Then, as described in the section of the related art, the radiator 20 and the engine body 22 (the oil pan 2) are disposed.
3), the oil pan 23 is in the form of a substantially inverted L-shape projecting downward. Also,
Reference numeral 15 denotes a frame, which supports the structure of the engine body 22 and the like.

The first transmission 24 is directly connected to the engine main body 22. The first transmission 24 receives the power output from the engine main body 22 and appropriately decelerates the power so that the first transmission 24 is used for traveling, for blowers, for hydraulic power, and for chemical liquids. Power transmission means for outputting power for agitation and power spraying. Reference numeral 16 denotes a blower unit, which is provided with a number of spray nozzles (not shown), from which agricultural chemicals are sprayed. Reference numeral 18 denotes a wind tunnel, which is provided with a blade for blowing air, and blows air so that air is sucked from the rear end side and discharged to the side from the blowing unit. These components are the same as those of a conventional agricultural chemical sprayer, and a detailed description thereof will be omitted.

Reference numeral 30 denotes a clutch, and reference numeral 40 denotes a second transmission. The clutch 30 and the second transmission 40 are arranged in parallel so as to fit in a space below the radiator 20 and in front of the oil pan 23. In other words, the configuration of the clutch 30 and the second transmission 40 is compactly arranged by suitably utilizing the empty space below the radiator 20 in the engine room. The clutch 30 receives power from the first transmission 24 via the engine power transmission shaft 26 to transmit power for traveling, and the second transmission 40 receives power from the clutch 30 and transmits power for traveling.

Reference numeral 50 denotes a rear differential axle, which is disposed below the engine body 22. The rear differential axle 50 is provided directly connected to the rear of the second transmission 40, and transmits power to the axle 62 of the rear wheel 60. The operating principle of the rear differential axle 50 is the same as that of a normal vehicle differential, and a description thereof will be omitted.

As described above, by disposing the clutch 30, the second transmission 40, and the rear differential axle 50, these three members as a whole
When viewed from above, the shape is T-shaped as shown in FIG.
When viewed from the side, it is an L-shaped device. The clutch 30 and the second transmission 40 disposed in parallel correspond to a portion protruding upward from the L-shape, and include a rear differential axle 50 and a transmission mechanism (bevel gear 45a) from the second transmission 40 to the rear differential axle 50. , 52a
) Correspond to a portion protruding rearward of the L-shape, and the overall shape when viewed from the side is L-shaped (see FIGS. 1 and 2). Both the L-shaped device configuration and the inverted L-shaped device configuration face each other to fill an empty space, and the components are arranged in a state in which space efficiency is extremely high. . As a result, it is possible to eliminate useless space and to provide an extremely compact form of the engine drive unit.

Further, in the present embodiment, as is apparent from the drawing, the structure of the clutch 30, the second transmission 40, and the rear differential axle 50 is different from that of the case 32 in which the case frame 34 is integrally formed. (Storage space 51 having the structure of the open-to-atmosphere space 31, the liquid-tight space 33, and the rear differential axle 50)
Each is stored in. In this regard, in the conventional agricultural chemical spraying vehicle, the case containing the clutch and the second transmission and the case containing the rear differential axle are separately provided, and as described above, the propeller shaft 57 for the rear wheel drive is provided. And to connect them using universal joints 55, 55,
The number of parts has increased and the configuration has become more complicated, resulting in higher manufacturing costs.

Next, the form of the case 32 accommodating the clutch 30, the second transmission 40, and the rear differential axle 50 of this embodiment will be described.
This will be described in detail with reference to FIGS. FIG. 6 shows a case frame 3 in which the power transmission mechanism (configuration) of the clutch 30 and the second transmission 40 according to the present embodiment is stored.
It is a front view which shows the liquid-tight surface of No. 4. FIG. 7 is a developed cross-sectional view showing a power transmission mechanism from the clutch 30 according to the present embodiment to the rear differential axle 50 via the second transmission 40.

Reference numeral 35 denotes a liquid-tight surface, which is formed on one and the same plane, and is easy to manufacture and can reduce the manufacturing cost. As shown in FIG. 7, the liquid-tight surface 35 houses the open-to-atmosphere space 31 of the clutch 30, the gear mechanism of the second transmission 40, and the gear 36 that transmits power from the clutch 30 to the second transmission 40. The inner case cover 38 that isolates the liquid-tight space 33 is used to mount the inner case cover 38 to the case frame 34 in a liquid-tight manner. Also,
The liquid-tight surface 35 is provided with an outer case cover 48 for housing the gear mechanism of the second transmission 40 and the gears for transmitting power from the clutch 30 to the second transmission 40 in the liquid-tight space 33 of the case 32 in a sealed state. Is used in a liquid-tight manner to the case frame 34.

Reference numeral 30a denotes an input shaft to the clutch 30, and 30b denotes a main drive shaft. Also,
The second transmission 40 includes a single shaft 41 and an R shaft 4
6, a shaft 42, a shaft 43, a shaft 4, a shaft 44, and a shaft 45 are provided, and gears for shifting and deceleration are respectively provided. Power is transmitted from the fifth shaft 45 to the rear wheel 60, and power is transmitted from the fourth shaft to the front wheel 56. Further, reference numerals 47a, 47b, 47c shown in FIG. 6 denote speed changeover forks, and reference numeral 49 shown in FIG. 7 denotes a parking brake drum. Further, reference numeral 40a shown in FIG. 1 is a shift switching lever take-out portion. As described above, the configurations of the clutch 30 and the second transmission 40 have been briefly described, but the configurations and operations thereof are the same as those of the related art, and the description thereof will be omitted.

Next, a rear differential axle 50 according to this embodiment will be described with reference to FIG. In this embodiment, the clutch 30 and the bevel gear 45a provided at one end of a shaft 52 arranged in a direction perpendicular to the traveling direction are provided by a bevel gear 45a fixed to the rear end of the five shaft 45 of the second transmission 40. The rotation of the rear wheel 60 by the rotation axis parallel to the traveling direction in the second transmission 40 is converted to the rotation of the rear wheel 60 by the rotation axis parallel to the axle 62. Then, the rotation of the shaft 52 is
Is transmitted to a ring gear 54 of the rear differential axle 50 via a gear 52b provided on the other end side of the
The differential function is to be activated. Power is suitably transmitted by such a gear mechanism.
Reference numeral 53 denotes a case cover of the rear differential axle, which is mounted on the case frame 34 in a liquid-tight manner on the liquid-tight surface 51a on the rear end side in order to seal the storage space 51.

In the above embodiment, the power is transmitted from the second transmission 40 to the front differential 58 via the front wheel drive propeller shaft 57, and the case of four-wheel drive is shown. Of course, it is not limited. As described above, the present invention has been described variously with reference to preferred embodiments. However, the present invention is not limited to the embodiments, and it is needless to say that many modifications can be made without departing from the spirit of the invention. That is.

[0021]

According to the agricultural chemical sprayer according to the present invention, the clutch and the second transmission are arranged in parallel in the space below the radiator and in front of the oil pan, and behind the second transmission. Since the rear differential axle is directly connected and disposed below the engine main body, the engine drive device is provided in a compact manner. For this reason, the capacity of the chemical solution tank can be ensured without extending the wheel base, as compared with the conventional configuration in which the clutch and the second transmission are provided below the chemical solution tank. That is, it is possible to form the tank of the chemical solution short in the vehicle length direction, and as a result, the vehicle length can be shortened, and thereby the traveling mobility can be improved. In addition, since the rear differential axle is directly connected to the rear of the second transmission, the configuration can be simplified, for example, a rear wheel drive propeller shaft is not required, and the production cost can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a side view showing one embodiment of an agricultural chemical sprayer according to the present invention.

FIG. 2 is a side view showing a main part of the embodiment of FIG.

FIG. 3 is a plan view showing a main part of the embodiment of FIG. 1;

FIG. 4 is a front view showing a main part of the embodiment of FIG. 1;

FIG. 5 is a rear view showing a main part of the embodiment of FIG. 1;

FIG. 6 is a front view showing a liquid-tight surface of a case frame housing the clutch and the power transmission mechanism of the second transmission according to the embodiment of FIG. 1;

FIG. 7 is a developed sectional view showing a power transmission mechanism from the clutch according to the embodiment of FIG. 1 to the rear differential axle via the second transmission.

FIG. 8 is an explanatory sectional view showing a power transmission mechanism to a rear differential axle in the embodiment of FIG. 1;

FIG. 9 is a side view showing a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Control part 12 Chemical tank 14 Engine room 20 Radiator 22 Engine main body 23 Oil pan 24 1st transmission 26 Engine power transmission shaft 30 Clutch 31 Open air space 32 Case 33 Liquid tight space 34 Case frame 35 Liquid tight surface 38 Inner case cover 40 second transmission 48 outer case cover 50 rear differential axle 56 front wheel 58 front differential 60 rear wheel

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A01M 7/00 B05B 17/00 B60K 17/00

Claims (3)

(57) [Claims] 1. An engine body in which a radiator and a lower surface of an oil pan are located below a lower surface of the radiator, from a front side to a rear side, behind a control unit and a chemical liquid tank disposed behind the control unit. A rear-engine-mounted agricultural chemical sprayer, which is arranged in the order of a first transmission for transmitting power for traveling and agricultural chemical spraying, in a space in front of the oil pan below the radiator, A clutch that receives power from the first transmission via an engine power transmission shaft and transmits power for traveling, and a second transmission are arranged in parallel, and a rear differential axle is directly connected to the rear of the second transmission, and An agricultural chemical sprayer, which is disposed below an engine body. 2. A structure according to claim 1, wherein said clutch, said second transmission, and said rear differential axle are housed in respective housing spaces of a case integrally formed with a case frame. Item 4. The agricultural chemical spraying vehicle according to Item 1. 3. A liquid containing a space for opening the atmosphere of the case containing the clutch, and a gear for transmitting power to the second transmission via a main drive shaft connected to the clutch. A liquid-tight surface used for mounting the inner case cover to the case frame in a liquid-tight manner and a gear for transmitting power to the second transmission are housed in the case in a sealed state so as to isolate a tight space. 3.The liquid-tight surface used to mount the outer case cover to the case frame in a liquid-tight manner, wherein the liquid-tight surface is formed on one and the same plane in the case frame. Agricultural chemical sprayer.