JPH09275874A - Sulky administrative working vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the subject working vehicle for applying e.g. a liquid agrochemical through running on the fields such as paddy fields, so designed that the vehicle body is mounted with a transversely oblong tank and its center of gravity is relatively stable even if the reserves in the tank are varied and can be kept low even in the case that the tank is being filled up to its capacity. SOLUTION: This sulky administrative working vehicle is so designed that the vehicle body 1 is mounted with a transversely oblong liquid agrochemical tank 14 which is situated at a low height as a whole. The vehicle body 1 is equipped with front and rear running wheels 6, 8 via front and rear accelerator ceases, and when the tank 14 is placed nearly within the distance between these accelerator cases, the variation in the center of gravity of the vehicle body involved in the variation in the reserves in the tank 14 can be kept minimum.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a passenger management work vehicle that travels in a paddy field or a field where rice is grown and sprays a chemical solution or fertilizer.

[0002]

Conventionally, a tank for storing a chemical solution or the like is mounted on the upper surface of the rear portion of the vehicle body frame. In this case, the body weight of the machine increases or decreases depending on the increase or decrease in the amount of the chemical solution stored in the tank. It changes, especially when the tank is full, and the center of gravity becomes the highest position, and the stability of the car body is lacking.

[0003]

SUMMARY OF THE INVENTION However, according to the present invention, there is provided a passenger management work vehicle in which front and rear traveling wheels are mounted on a lower side of a vehicle body frame via an axle case, and a tank is mounted on an upper surface of the vehicle body frame. The tank is provided in a laterally long shape that is long in the left-right direction, and the overall tank is made bulky to minimize the movement of the center of gravity even when the storage amount in the tank changes, and to keep the center of gravity even when the tank is full. It keeps it in a low position to improve the stability of the vehicle body.

Further, the tank is formed in a U shape in plan view,
By arranging the tank around the driver's seat, it is possible to effectively expand the tank capacity while keeping the total height of the tank low, and it is easy to install the tank operation tool and tank-related devices near the driver's seat. It is something that

Further, the tank is arranged substantially within the width of the front and rear axle cases to improve the stability of the vehicle body by keeping the change of the center of gravity of the vehicle body to a minimum with respect to the increase and decrease of the storage amount in the tank.

Furthermore, an operation tool for operating the tank and the tank-related device is provided near the side of the driver's seat of the tank so that the tank and the related device can be easily operated while sitting in the driver's seat. In this way, the efficiency of spraying chemicals and fertilizers is improved.

Further, the front and rear running wheels are provided with substantially the same diameter on the substantially same tread, and the front and rear running wheels are provided with large diameters such as tires with lugs, thereby improving running performance in wetlands and improving traction. In addition, it prevents the cropping of the crop by the running wheels to the minimum.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. 1 is a plan view of a management work vehicle, FIG. 2 is a side view of the same, FIG. 3 is a side view of a vehicle body frame portion, and FIG. 4 is a plan view of the same.
In the figure, (1) is a traveling vehicle on which an operator rides. The engine (2) is mounted above the front part of the vehicle body frame (3), and the gear reduction case (4) is forwarded via a front axle case (5). The front running wheels (6) are supported, and the rear axle case (7) is connected to the rear portion of the gear reduction case (4),
The rear running wheels (8) are supported on the rear axle case (7). The steering handle (10) is attached to the rear part of the bonnet (9) that covers the engine (2) and the like.
The gear reduction case (4) and the like are covered by a vehicle body cover (12) on which an operator rides through step (11),
The driver's seat (13) is attached to the upper part of the vehicle body cover (12).

Further, (14) in the figure is a chemical solution tank,
(15) is a spraying work machine equipped with a spreader boom (16) and the like, and is hitch to the rear side of the traveling vehicle (1) via a link mechanism (19) including a top link (17) and a lower link (18). The lower link (1) is provided with a hydraulic lifting cylinder (21) that connects the frame (20) and lifts and lowers the spraying working machine (15) via the link mechanism (19).
8), the front and rear traveling wheels (6) and (8) are driven to travel between the rice in the paddy field to continuously perform the spraying work.

Further, in the figure, (22) is a main transmission lever, and (2
Reference numeral 3) is an auxiliary shift lever for lifting and lowering work travel, (24) is a main clutch pedal, and (25) and (25) are left and right brake pedals.

Further, as shown in FIGS. 3 to 4, the engine (2) is mounted on the front part of the pair of right and left square tubular body frames (3) and (3), and the front axles (26) and (26) are mounted. The front axle case (5) for pivotally supporting the left and right front running wheels (6) (6) is mounted on the lower surface of the vehicle body frame (3) (3) behind the engine (2) so as to be freely rollable, and the front axle case (5) ) A continuously variable belt traveling speed change case (27) is provided between the rear left and right vehicle body frames (3) and (3), and a gear reduction case (4) is provided between the rear left and right vehicle body frames (3) and (3). ) And rear axle (2
8) The rear axle case (7) that pivotally supports the left and right rear running wheels (8) and (8) via (28) is fixed to the lower surface of the rear end of the left and right vehicle body frames (3) and (3), and the engine (2 ) The output is transmitted to each axle case (5) (7) as a traveling driving force via each case (27) (4) to drive the front and rear traveling wheels (6) (8).

Further, right and left columns (29) and (29) are erected on the upper surfaces of the rear ends of the left and right body frames (3) and (3), and the upper ends of the left and right columns (29) and (29) are connected by a horizontal frame (30). The pillar (29) and the horizontal frame (30) are integrally fixed to each other to form a portal shape in a front view. Then, between the brake pedal receiving shaft (31) in the middle of the body frame (3) and the middle of the horizontal frame (30), subframes (32) and (32) that tilt forward, rearward, and rearward are installed, and
A lifting cylinder (21) is attached between the body frames (3) and (3), and a link mechanism (19) formed by the top link (17) and the lower link (18) is attached by a link attachment member at the rear of the body frame (3). The link mechanism (19) is attached to a certain upper and lower link frame (33) (34) via a support shaft (35) by an elevating cylinder (21).
Is configured to be swung to raise and lower the spraying work machine (15).

Further, a counter pulley (37) is attached to the front end side of the counter shaft (36) provided below the engine (2), and the engine (2) is provided substantially above the center between the left and right vehicle body frames (3) and (3). Of the counter pulley (3).
Is connected to 7). A clutch case (39) is integrally formed on the right front surface of the gear reduction case (4), the right side rear surface of the continuously variable belt traveling speed change case (27) is connected and fixed to the front surface of the clutch case (39), and the lifting cylinder (39 A hydraulic pump (40) for actuating 21) is fixed to the left rear surface of the traveling speed change case (27), and the transmission shaft (41) with a universal joint is connected to the rear end of the counter shaft (36) and the traveling speed change case (27). The engine (2) output is transmitted to the traveling speed change case (27), and the traveling output shaft (42) is provided between the axle cases (5) and (7) and the gear reduction case (4). The shift output of (4) is transmitted to the front and rear traveling wheels (6) and (8) via the axle cases (5) and (7).

By the way, the front and rear running wheels (6) and (8) have tires with lugs, and are provided on wheels having substantially the same diameter and a large diameter to secure a ground clearance and a traction force above a certain level of the vehicle body, and the front and rear wheels are the same tread. It is provided on the vehicle to minimize the stepping down of the crop by the running wheels (6) and (8).

As shown in FIGS. 5 to 7, two upper and lower first and second PTO shafts (43) (44) of the same size are provided at the substantially left and right central positions of the rear portions of the left and right vehicle body frames (3) (3). , P that projects rearward of the deceleration case (4)
The first output shaft (45) for TO is interlockingly connected to the first PTO shaft (43) through the PTO transmission shaft (46), and the sprocket (47) (48) fixed to the first and second PTO shafts (43) (44). ) Are interlocked with each other via a chain (49) to rotate the first and second PTO shafts (43) (44). A front end of the PTO transmission shaft (46) is coupled to and supported by the output shaft (45), and a rear end of the PTO transmission shaft (46) is rotatably supported by a bearing bracket (50) fixed to the left vehicle body frame (3). The first PTO shaft (43) is detachably connected to the rear end of the pin 46) via a pin (51).

The second PTO shaft (44) is removably integrally connected to a rotary receiving shaft (52) disposed below the rear rear axle case (7) via a pin (53). The bearing case (54) of the shaft (52) is detachably fixed to the lower surface of the rear rear axle case (7) via a mounting plate (55) and bolts (56).

Then, the first and second PTO shafts (43) (44) are selected according to various working machines such as a spraying working machine (15) or a rice transplanter (57) mounted on the rear side of the traveling vehicle (1). The first PTO shaft (43) is used in a normal working machine such as a spraying working machine (15) that is driven and is maintained at a relatively high position, while, for example, a rice transplanter (57), etc. Of the drive shaft (60) that connects the input shaft (59) of the drive case (58) of the rice transplanter (57) and the PTO shaft (43) in the working machine that is lowered to near the ground surface. Under conditions where the bending angle exceeds the allowable value and it becomes difficult to maintain the proper strength, the 2nd PT
By connecting the drive shaft (60) to the O-axis (44), it is possible to perform an appropriate PTO drive without a problem even in a work model with low position specifications and to improve the commonality. is there.

Further, the lifting cylinder (21) is connected at its rear end to the horizontal frame (3a) between the left and right body frames (3) at the rear of the left and right body frames (3), and the piston rod (21
a) The tip is connected to the lower link (18) through the swing link (18a), and the lift cylinder (21) is arranged at a low position to prevent interference with the tank (14) arranged above this. It is configured to do.

As shown in FIGS. 8 to 9, the chemical liquid tank (14) is formed in a laterally long shape that is long in the left-right direction, and has a width substantially the same as the lateral width of the machine body. It is extended and formed in the side wall portion (14a), and the whole shape is formed in a gate shape.
The other side is provided so as to be surrounded by the tank (14).

A valve unit (61) related to the tank (14) and an operating tool (62) having operating switches for spraying are arranged on the driver's seat (13) side such as the front of the tank (14). The valve unit (61) and the operation tool (62) can be easily installed in the tank (1) while allowing them to be operated while sitting in the driver's seat (13).
4) by equipping the spraying machine (1
When removing 5), do not remove each tank (1
It is constructed so that it can be easily removed together with 4). The operation tool (62) has a magnet (63) for mounting and fixing, and is provided so that it can be freely installed by a magnet (63) at an appropriate place of the valve unit (61) or the tank (14). It is a thing.

Further, the tank (14) is arranged substantially within the front-rear dimension (L) of the front and rear axle cases (5) and (7) so that the center of gravity of the vehicle body is maintained even if the amount of the chemical liquid in the tank (14) increases or decreases. Is suppressed to be small in order to prevent the center of gravity from deviating in the front-rear direction, and by expanding the area of the U-shaped tank (14), the center of gravity is kept low even when the tank (14) is full.

Further, the tank (14) is connected to the rear portion of the vehicle body frame (3) and the left and right front step stays (64) on the front side of the vehicle body frame (3) and the left and right sides for connecting the rear end of the vehicle body frame (3). It is mounted on the upper surface of the rear step stay (65) to cover the front upper part of the rear traveling wheel (8), and the tank (1
It is constructed so that it is surrounded and protected by 4).

As shown in FIGS. 10 to 12, the front running wheel (6) is provided with a grass body (66) for allocating the foliage of a crop such as rice or vegetables to the left and right, and the front axle case (5). ) Is fixed to the front traveling wheel (6) via the pivot plates (67a) and (67b) and surrounds the front traveling wheel (6), and the front traveling wheel (6) is fixed to the front end of the frame (68). ) Forms a grass body (66) together with a grass plate (69) covering the front side of the upper horizontal frame (6).
8a) and a lower horizontal frame (68b) having a front-rear length longer than that of the frame (68a) to form a grass body (66) in a trapezoidal shape in a side view, and an upper and lower horizontal frame (68a).
(68b) Upper and lower two steps outside the rear end (11)
Is fixed, and the grass body (66) is provided with upper and lower two-step type steps (11). The installation position of the step (11) may be any position of the grass body (66).

Further, resin discs (70) are attached to the front running wheels (6), the gaps between the spokes (71) are covered with the discs (70), and the spokes (7) of crops such as rice are
1) to prevent entanglement with the disc,
0) The disk (70) is sandwiched by three arc-shaped presser plates (72), each of which divides the outer circumference into three parts, and the spokes (71) are provided with a retainer fitting (73) and a bolt (74). Mounted integrally via the disc (70)
It is configured to reduce the weight (of resin) and reinforce the disc (70) by the holding plate (72).

[0025]

As is apparent from the above-described embodiments, the present invention has the axle case (5) on the lower side of the vehicle body frame (3).
In the passenger management work vehicle in which the front and rear traveling wheels (6) and (8) are mounted via (7), and the tank (14) is mounted on the upper surface of the vehicle body frame (3), the tank (14) is moved in the left-right direction. Since it is provided in a long and horizontally long shape, the entire tank (14) can be formed to be bulky, and the movement of the center of gravity can be suppressed to the minimum even if the storage amount in the tank (14) changes.
Even when the tank (14) is full, the center of gravity can be kept at a low position to improve the stability of the vehicle body.

Further, since the tank (14) is formed in a U-shape in a plan view, the tank (14) is arranged so as to surround the driver's seat (13) and the overall height of the tank (14) is kept low. In this state, the tank capacity can be effectively expanded, and the tank operation tool and the tank-related device can be easily installed near the driver's seat (13) to improve the workability. Is something that can be done.

Further, since the tank (14) is arranged within the width of the front and rear axle cases (5) and (7), the center of gravity of the vehicle body is changed with respect to the increase and decrease of the storage amount in the tank (14). It can be kept to a minimum and the stability of the vehicle body can be improved.

Furthermore, since the operation tool (62) for operating the tank (14) and the tank-related device is provided near the driver's seat side of the tank (14), the driver's seat (13)
It is possible to easily operate the tank (14) and its related devices while sitting on the table, and to improve the efficiency in the spraying work of the chemical solution and fertilizer.

Further, since the front and rear traveling wheels (6) and (8) are provided on the same tread with substantially the same diameter, the front and rear traveling wheels (6) and (8) have large diameters and are tires with lugs or the like. As a result, it is possible to improve the running performance in a wetland and the like, improve the traction force, and prevent the crop from being stepped down by the running wheels (6) and (8) to a minimum.

[Brief description of drawings]

FIG. 1 is a plan view of a management work vehicle.

FIG. 2 is a side view of a management work vehicle.

FIG. 3 is a side view of a body frame portion.

FIG. 4 is a plan view of a body frame portion.

FIG. 5 is a side view of a PTO shaft portion.

FIG. 6 is a plan view of a PTO shaft portion.

FIG. 7 is a side view of a PTO shaft portion.

FIG. 8 is an explanatory plan view of a body frame portion.

FIG. 9 is a perspective explanatory view of a tank.

FIG. 10 is a side view of a grass body.

FIG. 11 is an explanatory plan view of a grass body.

FIG. 12 is an explanatory diagram of mounting a disc.

[Explanation of symbols]

 (3) Body frame (5) (7) Axle case (6) (8) Running wheel (14) Tank (62) Operation tool

Claims (5)

[Claims] 1. In a passenger management work vehicle in which front and rear traveling wheels are mounted on a lower side of a vehicle body frame via an axle case, and a tank is mounted on an upper surface of the vehicle body frame, the tank has a laterally long shape extending in the left-right direction. A passenger management work vehicle characterized by being provided. 2. The passenger management work vehicle according to claim 1, wherein the tank is formed in a U shape in a plan view. 3. The passenger management work vehicle according to claim 2, wherein the tank is arranged within a substantially width of the front and rear axle cases. 4. The passenger management work vehicle according to claim 3, wherein an operating tool for operating the tank and the tank-related device is provided in the vicinity of the driver's seat side of the tank. 5. The passenger management work vehicle according to claim 3, wherein the front and rear traveling wheels are provided on substantially the same tread with substantially the same diameter.