JPH05294246A - Self-traveling working vehicle - Google Patents

Abstract

PURPOSE:To facilitate direction change in a narrow place by providing a steering wheel for steering at least a lateral pair of front or rear crawlers in a self-traveling working vehicle provided with the front and rear travel crawlers in lateral pairs. CONSTITUTION:Each of a lateral pair of front crawlers 5 is provided at each truck frame 4 through a drive sprocket 1, truck rollers 2, 2 and a tension roller 3, and each of a lateral pair of rear crawlers 10 is provided at a rear truck frame 9 through a drive sprocket 6, truck rollers 7, 7, 7 and a tension roller 8. A steering wheel 15 for steering the front or rear crawlers 5 or 10 is provided on the center upper side of a body base 11. Since the travel direction is changed by the operation of the steering wheel 15, the direction change in a narrow place such as the ground of a farm is facilitated. Also the disorder of the travel ground surface is reduced, and the improvement of operability and the simplification of a travel driving system are attained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-propelled work vehicle that travels over ridges and performs harvesting work.

[0002]

2. Description of the Related Art Conventionally, there has been a technique in which four traveling crawlers, front and rear, and left and right, are installed and each crawler is driven to move.

[0003]

In the prior art, a plurality of hydraulic pumps for separately driving the left and right crawlers or a side clutch mechanism are provided, the crawlers on the inside of the turn are stopped, and the crawlers on the outside of the turn are driven. Since the traveling direction was changed to, there was a problem that it was not possible to easily change the direction in a narrow place such as a headland in the field, and it was not possible to easily reduce the weight and size of the traveling drive structure and reduce the cost. ..

[0004]

SUMMARY OF THE INVENTION However, the present invention is a self-propelled vehicle equipped with a pair of left and right traveling front and rear crawlers, and is provided with a steering handle for steering at least a front or rear pair of left and right crawlers. Since the steering wheel is operated to steer the crawler to the left or right to change the traveling direction, compared to the conventional turning by driving the outer crawler, the direction can be easily changed in a narrow place such as a headland of a field. Further, the disturbance of the traveling ground can be reduced, and the driving operability can be improved and the traveling drive system can be simplified.

Further, in a self-propelled work vehicle having a pair of right and left running front and rear crawlers, a climbing angle is formed on the front side and the rear side of each of the crawlers. Since it can be obtained in both forward and backward movements, the crawler can be prevented from coming off, and the running performance and safety can be easily improved.

Further, in a self-propelled work vehicle having a pair of left and right traveling front and rear crawlers, the front and rear direction ground contact length of the front crawler is made shorter than the front and rear direction ground contact length of the rear crawler, and the pair of left and right front crawlers is operated. Since the steering handle for directing the steering wheel is provided and the front crawler having a short contact length is steered, the load on the steering handle can be reduced and the steering performance can be easily improved.

Further, in a self-propelled work vehicle including a pair of left and right traveling front and rear crawlers, a front diff mechanism for transmitting a traveling driving force to a pair of left and right front crawlers and a rear diff mechanism for transmitting a traveling driving force to a pair of left and right rear crawlers. Are provided respectively, it is possible to easily improve steering performance such as course correction and prevent slippage of the crawler.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 is an explanatory plan view of a main part, FIG. 2 is a side view of the whole,
FIG. 3 is a plan view of the same. The front crawler (5) is mounted on each track frame (4) through the drive sprocket (1), the track rollers (2) and (2), and the tension roller (3), and A rear crawler (10) is mounted on the rear track frame (9) via a drive sprocket (6), track rollers (7), (7), (7), and a tension roller (8). The front and rear crawlers (5), (5), (10) and (10) are slender in the front and rear direction (1
1), the hood (1) on the front upper side of the machine base (11)
The engine (13) is installed in 2), the mission case (14) is mounted on the upper center of the machine base (11), and the driver's cab (17) including the steering wheel (15) and the driver's seat (16) is provided. It is provided on the right side of the center of the machine base (11).

Further, a front axle case (18) is provided on the machine base (11) below the engine (13), and a transmission case (14) having a traveling speed change lever (19) outputs the engine (13) after shifting. The case (1
8) through a propeller shaft (20), and the left and right front final cases (21) (21) upper end sides are rotatably connected to the left and right sides of the case (18) around a vertical axis. The track frame (4) is integrally connected to the lower end of the final case (21) to form a machine base (1
1) The front crawler (5) is provided at a position lower than the lower surface, and the traveling output of the final case (21) is transmitted to the sprocket (1) through the chain case (22). As shown in FIG. While forming the upper surface of the front crawler (5) lower than the lower surface of the machine base (11), the left and right final cases (21) and (21) are attached to the tie rods (2) as shown in FIG.
3) and connect the right final case (21) to the steering handle (15) with the drag rod (2).
4) a pair of left and right front crawlers (5)
The steering wheel (15) is used to change the direction of the steering wheel (15), and the axle case (18) is internally provided with a front differential mechanism (25).
(5) is configured to differentially transmit the traveling drive force.

Further, a rear axle case (26) is provided on the rear side of the machine base (11), and the output of the engine (13) after the gear shift is transmitted by the transmission case (14) to the case (2).
6) via a propeller shaft (27), and the upper and lower ends of the left and right rear final cases (28) and (28) are connected to the left and right sides of the case (26) so as to be vertically movable. ) A track frame (9) is integrally connected to the lower end side, and the traveling output of the final case (28) is transmitted to the sprocket (6) through the chain case (29). The rear crawler (10) is attached to the machine base (11) via the spring absorber (30) so as to be able to move up and down, and the axle case (26) is internally provided with the rear differential mechanism (31) to provide a pair of left and right rear. Crawler (10)
The driving force is differentially transmitted to (10).

Further, as shown in FIG. 4, the shoe elevation angles (θ1) (θ2) are provided on the front and rear sides of the crawlers (5) (10).
The front crawler (5) front side and the rear crawler (10) rear side are formed to have substantially the same rise angle (θ1).
The front crawler (5) rear side and the rear crawler (10) front side are formed to have substantially the same shoe elevation angle (θ2), and the front crawler (5) rear side and the rear crawler (10) front side are also formed.
Compared to 2), front crawler (5) front and rear crawlers (1
0) The rear shoe elevation angle (θ1) is formed to be large.

Further, as shown in FIG. 4, the front crawler (5)
Compared with the ground contact length (L1) in the front-rear direction, the rear crawler (1
The ground contact length (L2) in the front-rear direction of (0) is made longer, and the ground contact area of the front crawler (5) is made smaller than that of the rear crawler (10) to reduce the turning resistance of the front crawler (5). The steering wheel (15) can be used to easily steer the front crawler (5), and the rear crawler (10) has a larger ground contact area than the front crawler (5). An agricultural work machine such as a tank (32), an auxiliary worker sheet (33), or a vegetable seedling transplanter (34) is attached to the rear side of the machine stand (11), and is attached to the rear side of the machine stand (11) and the rear hitch (35). Attach a heavy load, and use the front hitch (3
The weight (37) of 6) stabilizes the front-rear balance of the machine body, and the rear crawler (10) supports heavy objects to perform agricultural work.

Further, as shown in FIG. 5, the grooves (39) between the ridges (38) formed in the field are fitted in the front and rear crawlers (5) (1).
0) runs and moves across the ridge (38),
For example, the height (A) of the ridge (38) is 20 to 40 cm, the ridge width (B) is 40 to 100 cm, and the groove width (C) is 15 to 40 cm.
8) Grows vegetables on the upper surface, and the left and right widths of the front and rear crawlers (5) (10) (about 15 to 20 cm) than the width (C) of the groove (39) formed between the ridges (38). 1), the front and rear crawlers (5) and (10) are formed to have substantially the same lateral width as shown in FIG. 1, and the front and rear crawlers (5) and (10) are arranged in a straight line in the front and rear direction. There is.

Then, a tilling work machine, a ridge standing machine, a multi-working machine, etc. are mounted on the machine base (11) to form the ridges (38) and cover with the multi-film, and also a seeder or a transplanter (34). While seeding or transplanting vegetable seedlings by mounting on the machine base (11), the water tank (32) containing the chemical solution is mounted on the machine base (11) to perform the chemical solution spraying work to prevent the occurrence of pests and diseases. Furthermore, a root vegetable mower or the like is attached to the machine base (11) to harvest root vegetables.

[0015]

As is apparent from the above embodiments, the present invention is a self-propelled work vehicle including a pair of left and right traveling front and rear crawlers (5) (10), and at least a front or rear pair of left and right crawlers (5). The steering handle (15) for steering the steering wheel (15) is provided, and the steering crawler (5) is turned to the left or right to change the traveling direction. Compared with the conventional turning by driving, it is possible to easily change the direction in a narrow place such as a headland in the field, reduce the disturbance on the running ground, improve the driving operability and simplify the running drive system. This can be easily achieved.

Further, in a self-propelled work vehicle including a pair of left and right traveling front and rear crawlers (5) and (10), a shoe elevation angle (θ1) is provided on the front side and the rear side of each of the crawlers (5) and (10).
Since each (θ2) is formed, the climbing performance over the convex portion of the traveling ground can be obtained in forward and backward movement, so that the crawlers (5) and (10) can be prevented from coming off, and the traveling performance and safety are improved. Can be easily achieved.

In a self-propelled vehicle equipped with a pair of left and right traveling front and rear crawlers (5) and (10), the front and rear direction of the front crawler (5) is longer than the front and rear direction ground contact length (L2) of the rear crawler (10). The grounding length (L1) is shortened and a steering handle (15) for steering the pair of left and right front crawlers (5) is provided. The front crawler (5) having a short grounding length is steered. Therefore, the load on the steering wheel (15) can be reduced and the steering performance can be easily improved.

Further, in a self-propelled work vehicle having a pair of left and right traveling front and rear crawlers (5) (10), a front diff mechanism (25) for transmitting a traveling driving force to a pair of left and right front crawlers (5) and a left and right pair of Rear diff mechanisms (31) for transmitting the traveling driving force to the rear crawlers (10) are provided respectively to improve steering performance such as course correction and the crawlers (5) (1).
The slip prevention of 0) can be easily achieved.

[Brief description of drawings]

FIG. 1 is an explanatory plan view of a main part.

FIG. 2 is an overall side view.

FIG. 3 is a plan view of the same.

FIG. 4 is a side view of a crawler section.

FIG. 5 is a front view of the same.

[Explanation of symbols]

 (5) Front crawler (10) Rear crawler (15) Steering handle (25) Front diff mechanism (31) Rear diff mechanism

Claims (4)

[Claims] 1. A self-propelled work vehicle comprising a pair of left and right traveling front and rear crawlers, wherein a self-propelled work vehicle is provided with a steering handle for steering at least a pair of left and right front and rear crawlers. 2. A self-propelled working vehicle comprising a pair of left and right traveling front and rear crawlers, wherein a self-propelled working vehicle is formed in which front and rear sides of each of said crawlers are provided with a climbing angle. 3. A self-propelled work vehicle comprising a pair of left and right traveling front and rear crawlers, wherein the front and rear direction ground contact length of the front crawler is made shorter than the front and rear direction ground contact length of the rear crawler and the pair of left and right front crawlers is operated. A self-propelled work vehicle that is equipped with a steering handle that is operated in the opposite direction. 4. A self-propelled work vehicle comprising a pair of left and right traveling front and rear crawlers, a front diff mechanism for transmitting a traveling driving force to a pair of left and right front crawlers, and a rear diff mechanism for transmitting a traveling driving force to a pair of left and right rear crawlers. A self-propelled work vehicle characterized by having respective