JPH09275707A - Sulky type work-controlling vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sulky type work-controlling vehicle which can secure a tank capacity on the main frame without increasing the whole machine height and is excellent in running stability and correspondency by arranging a lifting cylinder for lifting a lifting link mechanism almost horizontally in the space between the left and right main frames. SOLUTION: The lifting cylinder 21 for actuating the lifting link mechanism is almost horizontally arranged in the space between the left and right main frames 3. The tank is arranged on the upper part of the main frames 3 and an axle case is arranged to the lower part and the lifting cylinder 21 is made arrangeable between the tank and the axle case. Further, a linking point linking a lower link 18 for the lifting link mechanism to the lifting cylinder 21 is preferably made changeable.

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]

For example, in a management work vehicle having a structure in which a spraying work machine is mounted in the rear of a work vehicle and a chemical solution tank for spraying is mounted on the rear upper surface of the work vehicle, the tank of the chemical solution tank is used. If space for the tank is sought above in order to secure the capacity, the vehicle height becomes high and the main body becomes high in center of gravity and becomes unstable.

[0003]

SUMMARY OF THE INVENTION Therefore, according to the present invention, in a passenger management work vehicle in which various agricultural working machines are vertically movable through a lifting link mechanism at a rear portion of a main frame, a lifting cylinder for lifting the lifting link mechanism is provided. It is installed almost horizontally between the left and right main frames, and the lifting cylinder is installed in the most effectively low position to ensure the required tank capacity on the main frame without increasing the overall vehicle height. This is intended to lower the center of gravity of the vehicle body and improve stability during running.

A tank is installed above the main frame.
In addition, an axle case is installed in the lower part, and an elevating cylinder can be placed between these tanks and axle cases, and the elevating cylinder is well assembled in the narrow gap between the tank and axle case to maximize the overall vehicle height. It effectively suppresses it to a low level and improves the stability of the vehicle body.

Further, the lower link of the lifting link mechanism and the connecting point of the lifting cylinder are freely changeable, and the lifting stroke of the working machine can be easily changed by simply changing the connecting point of the lower link and the lifting cylinder. This makes it possible to improve the adaptability of various work machines mounted on a traveling vehicle.

Furthermore, in a passenger management work vehicle in which traveling wheels are equipped below the main frame via an axle case, the axle case is fixed to the lower side of a mounting stay fixed to the main frame with a bolt from above. Thus, compared to the conventional means for fixing the axle case with a bolt from the lateral direction, the slack of the bolt is suppressed to the minimum and the fastening force with respect to the main frame is increased to improve the assembling strength of the axle case. is there.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. 1 is a plan view of the lifting link mechanism, FIG. 2 is a side view of the whole, FIG. 3 is the same plan view, FIG. 4 is a side view of a vehicle body frame part, and FIG. 5 is the same plan view. In the figure, (1) is a traveling vehicle on which an operator rides. The engine (2) is mounted above the front part of the body frame (3) which is the main frame, and the front axle case (5) is installed in front of the gear reduction case (4). ) Is used to support the front traveling wheel (6), and a rear axle case (7) is connected to the rear portion of the gear reduction case (4) so that the rear traveling wheel (8) is attached to the rear axle case (7). Support. A steering handle (10) is attached to the rear of the hood (9) that covers the engine (2) and the like, and the gear reduction case (4) is provided by a vehicle body cover (12) on which an operator rides through step (11). Etc., and 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 the main transmission lever, (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. 4 to 5, the engine (2) is mounted on the front portion of the pair of right and left rectangular 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
Between the left and right body frames (3) (3), the lifting cylinder (2
1) is attached and a link mechanism (19) formed by the top link (17) and the lower link (18) is attached to the upper and lower link frames (33) (34) at the rear part of the vehicle body frame (3).
And the link mechanism (19) by the lifting 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 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 ensure 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 FIG. 1, FIG. 10 and FIG.
Two identically sized first and second PTO shafts (43) (4)
4) is provided, and the PTO transmission shaft (4) is attached to the PTO output shaft (45) projecting to the rear of the deceleration case (4).
6) via interlocking connection of the first PTO shaft (43) and interlocking via chain (49) with sprockets (47) (48) fixedly mounted on the first and second PTO shafts (43) (44). , The first and second PTO shafts (43) (4
4) is configured to rotate. The PTO transmission shaft (46) has a front end coupled to and supported by the output shaft (45) and a rear end fixed to the left vehicle body frame (3).
0) rotatably supported by the transmission shaft (46)
A first PTO shaft (43) is integrally connected to the rear end of the rear end via a pin (51) in a removable manner.

The second PTO shaft (44) is removably integrally connected to a rotary shaft (52) arranged below the rear rear axle case (7) through 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.

As shown in FIGS. 7 and 12, 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 part (14a), the whole shape is formed in a gate shape, and it is provided so that the tank (14) surrounds the rear side and the left and right sides of the driver's seat (13).

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, as shown in FIG. 5, the tank (14)
Is placed within the front-rear axle case (5) (7) substantially in the front-rear dimension (L) to suppress the movement of the center of gravity of the vehicle body even if the amount of the chemical liquid in the tank (14) increases or decreases, and It is configured such that the center of gravity is prevented from deviating and the low center of gravity is maintained even when the tank (14) is full by increasing the area of the U-shaped tank (14).

The tank (14) further includes a rear portion of the vehicle body frame (3), left and right front step stays (64) on the front side of the vehicle body frame (3), and left and right 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. 1, 6 and 8, the top link (17) is attached to a mounting bracket (66) of a portal-shaped upper link frame (33) which is erected on the rear upper surface of the vehicle body frame (3). The front end side is rotated via the link shaft (35a), and the lower link (18) is rotated on the lower end link frame (34) fixed to the rear lower surface of the vehicle body frame (3) via the link shaft (35b). The hitch frame (2) is freely supported and the rear end side of these links (17) (18) is connected via the hitch shafts (69) (70).
0) and the left and right lift arms (7) integrally connected to the lower link (18) on the link shaft (35b).
1) The tip end of the piston rod (21a) of the lifting cylinder (21) is connected to the arm shaft (72) which is the connecting point of the tip.

An arm shaft (73), which is another connecting point for mounting the piston rod (21a), is provided in the middle of the lift arm (71), and the arm shaft (73) and the lower link are connected. (18) Left and right stabilizers (7) for preventing horizontal shake between the pivots (74) on the rear end side.
5), the tip end of the piston rod (21a) is removably connected to the upper and lower arm shafts (72) (73), and the working machine (15) is operated by the same extension / contraction operation of the lifting cylinder (21). ) Is changed (the stroke of the lower arm shaft (73) is larger than that of the upper arm shaft (72)) to increase the degree of freedom with respect to the various working machines (15).

The elevating cylinder (21) is a bracket (77) of a horizontal frame (76) which is laterally provided between the inner side surfaces of the left and right frame (3) at the rear of the left and right body frames (3).
The base end side of which is pivotally supported via a pivot shaft (78) and is disposed between the left and right vehicle body frames (3) in a substantially horizontal posture. The tank (14) is above the rear axle and the rear axle is below. The case (7) is provided in a state of being closely arranged, and while maintaining a certain ground clearance in the vehicle body frame (3), the maximum lower center of gravity position can be obtained without causing the lifting cylinder (21) and the tank (14) to interfere with each other. It is configured to be installed in.

The rear axle case (7) is attached to the stay (79) at the rear of the left and right vehicle body frames (3) by bolts (8).
0), the stay (79) is fixed to the frame (3) so that the stay (79) protrudes inward under the frame (3), and the rear axle case (7) is attached to the lower surface of the stay (79). ), The mounting surface (7a) is joined, and the stay (7
9) The rear axle case (7) is fastened from the top and bottom with two bolts (80), respectively, so that the bolts (80) do not become loose with respect to the axle load in the front-rear and up-down directions and are effective against shearing. It is configured to allow good fixing of.

The left and right vehicle body frames (3) are formed on the front end side on which the driver's seat (12) and the like are arranged in an inclined shape of front low rear high, and also of the frame (3) having an elevating cylinder (21). The rear end extension (3a) is formed to be substantially horizontal, and a substantially horizontal tank stand space for mounting the tank (14) is secured on the upper surface of the extension (3a).

FIGS. 13 to 14 show a PTO output case (81) having a PTO shaft (43) in a vehicle body frame (3).
This is an example of a structure provided on the outer left side of the rear part of the vehicle. A PTO branch case (82) is fixed to the front side of the traveling transmission case (27), and a PTO transmission shaft with a universal joint is provided between the cases (81) and (82). (83) is provided, and the drive force of the transmission shaft (41) is branched by the PTO branch case (82) and transmitted to the PTO transmission shaft (83) immediately before inputting to the traveling speed change case (27). ) And PTO
The PTO shaft (43) is driven through the output case (81), and the PTO is applied to the spray pump of the spray work machine (15).
The drive force is transmitted via the shaft (43).

[0027]

As is apparent from the above-described embodiments, the present invention provides the lifting link mechanism (1) at the rear of the main frame (3).
9) In a passenger management work vehicle equipped with various agricultural working machines (15) so as to be able to move up and down via the lifting and lowering link mechanism (19).
Since the elevating cylinder (21) for elevating and lowering is disposed substantially horizontally between the insides of the left and right main frames (3), the elevating cylinder (21) is disposed at the lowest position as effectively as possible, and Mainframe without raising the vehicle height (3)
The tank capacity required above can be secured, the center of gravity of the vehicle body can be lowered, and the stability in running can be improved.

Further, the tank (14) is arranged above the main frame (3), and the axle case (7) is arranged below the main frame (3), and the tank (14) and the axle case (7) are arranged.
Since the elevating cylinder (21) can be arranged between them, the elevating cylinder (21) is favorably incorporated in the narrow gap between the tank (14) and the axle case (7) to maximize the overall vehicle height. It is possible to effectively suppress it to a low level and improve the stability of the vehicle body.

Furthermore, the lower link (18) of the lifting link mechanism (19) and the connecting point (7) of the lifting cylinder (21).
2) (73) is provided so that it can be freely changed. Therefore, the work machine (15) can be easily replaced by simply changing the connection points (72) (73) between the lower link (18) and the lifting cylinder (21). The lifting stroke can be easily changed, and the adaptability of various working machines (15) mounted on the traveling vehicle (1) is improved.

Furthermore, in a passenger management work vehicle in which traveling wheels (8) are mounted below the main frame (3) through an axle case (7), a mounting stay (79) fixed to the main frame (3). Since the axle case (7) is fixed to the lower side of the axle case with the bolt (80) from above, the bolt case can be compared with, for example, a conventional means for fixing the axle case (7) with a lateral bolt. Minimize slack in (80) mainframe (3)
It is possible to increase the fastening force with respect to and improve the assembling strength of the axle case (7).

[Brief description of drawings]

FIG. 1 is a plan view of a lifting link mechanism unit.

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

FIG. 3 is a plan view of a management work vehicle.

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

FIG. 5 is a plan view of a body frame portion.

FIG. 6 is a side view of a lifting link mechanism portion.

FIG. 7 is an explanatory plan view of a body frame portion.

FIG. 8 is a side view of a lifting link mechanism section.

FIG. 9 is an explanatory view of mounting the rear axle case portion.

FIG. 10 is a side view illustrating a PTO shaft portion.

FIG. 11 is an explanatory side view of the rear axle case portion.

FIG. 12 is a perspective explanatory view of a tank.

FIG. 13 is a side view showing another embodiment structure of the PTO shaft portion.

FIG. 14 is a plan view showing another embodiment structure of the PTO shaft portion.

[Explanation of symbols]

 (3) Body frame (main frame) (7) Axle case (14) Tank (15) Working machine (18) Lower link (19) Lift link mechanism (21) Lift cylinder (72) (73) Arm shaft (connection point ) (79) Stay (80) Bolt

Claims (4)

[Claims] 1. In a passenger management work vehicle in which various agricultural working machines are liftably mounted on a rear portion of a main frame through a lifting link mechanism, a lifting cylinder for lifting the lifting link mechanism is provided substantially horizontally between the insides of the left and right main frames. A passenger management work vehicle characterized by being installed in 2. The passenger compartment according to claim 1, wherein a tank is provided above the main frame and an axle case is provided below the main frame, and an elevating cylinder can be disposed between the tank and the axle case. Management work vehicle. 3. The passenger management work vehicle according to claim 1, wherein a connection point between the lower link of the lifting link mechanism and the lifting cylinder is freely changeable. 4. A passenger management work vehicle in which traveling wheels are equipped below a main frame via an axle case,
A passenger management work vehicle characterized in that an axle case is fixed to a lower side of a mounting stay fixed to a main frame with a bolt from above.