JPH08331936A - Traveling body - Google Patents

Abstract

PURPOSE: To enlarge a change angle of front wheels and to enable a small turn in turning in a small-sized traveling body arranged with an engine at the central part of a machine body. CONSTITUTION: A U-shaped rear frame 3 opening backward in a top view is connected to a front gear box 5 by a cylindrical middle frame 4 to constitute a machine body 7. Consequently, recessed parts A are formed at both sides of the middle frame 4, and an engine 17 and a pair of rear wheels 15 are respectively installed at the central part and the rear part of the rear frame 3. A pair of front wheels 11 to be rotated around a longitudinal shaft 10 and steered are laid at both sides of the gear box 5 so as to put the front wheels in the recessed parts A during the steering.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is effectively used for a seedling planting machine and other small agricultural machines.

[0002]

2. Description of the Related Art This type of machine is required to have a lowered center of gravity and a small turning. To achieve this, Japanese Patent Laid-Open No. 61-
As shown in Japanese Patent Publication No. 104714, a pair of rods are projected from the gear box at the tip end into an eight-shape when viewed from above to form an airframe, and an engine is attached to the eight-shape to attach the engine to the gear box. There are a pair of front wheels on both sides.

[0003]

According to the above disclosed technology, the engine arranged in the center of the fuselage has a lower center of gravity that is sunk into the 8-shaped rod, but the left and right rods are Since it extends from both sides of the gear box to the rear, the rear end of the front wheel cannot be reached after the gear box when the steering wheel is steered greatly. Therefore, if this is used for a small traveling vehicle,
The front wheel housing that protrudes to the left and right from the gear box is shortened, and the cutting angle of the front wheel is reduced, making it impossible to make a small turn when turning.

[0004]

In order to solve the above-mentioned problems, the present invention connects a U-shaped rear frame 3 which is opened rearward when viewed from above and a front gear box 5 with a rod-shaped intermediate frame 4. By constructing the airframe 7 by forming the recesses A on both sides of the intermediate frame 4, the engine 17 and a pair of rear wheels 15 are arranged in the central portion and the rear portion of the rear frame 3, and around the vertical axis 10. The pair of front wheels 11 that are rotated and steered are arranged on both sides of the gear box 5 so that the rear ends of the pair of front wheels 11 can enter the recesses A during steering.

[0005]

In the traveling vehicle body constructed as described above, the power of the engine 17 arranged in the central portion of the rear frame 3 has a pair of front wheels 11 arranged on both sides of the gear box 5 and the rear portion of the rear frame 3. The power is transmitted to the rear wheels 15 arranged on both sides of, or both of them, and these rotate and move forward in the field. Then, when the steering handle 20 is operated, the pair of front wheels 11 turns around the respective vertical axes 10 and turns. At this time, when the steering handle 20 is operated to the limit in order to make a small turn, the rear end of the front wheel 11 on the center side of the turn enters the recess A behind the gear box 5, and the front wheel 11
A large turning angle is given to the vehicle body and the vehicle body turns with a small turning radius.

[0006]

As described above, according to the present invention, the engine 1
7 is attached to the central portion of the U-shaped rear frame 3 so that the center of gravity of the whole is low, and when steered, the rear ends of the front wheels 11 enter the recess A between the gear box 5 and the rear frame 3. ,
Even with a small-sized machine in which the distance between the pair of front wheels 11 is small, it is possible to give a large cutting angle to the front wheels 11 while maintaining the frame strength and to make a turn with a small radius.

[0007]

Embodiments of the present invention will be described below. FIG.
Further, as shown in FIG. 2, the vehicle body 1 is equipped with the seedling planting device 2 to form a seedling planting machine. The traveling vehicle body 1 is configured as follows. As shown in FIGS. 1 and 3, a tube (or a square tube may be used) is bent into a U-shape that is opened later when viewed from above, to form the rear frame 3. The front and rear of the rod-shaped intermediate frame 4 are fixed to the rear end of the gear box 5 and the front end of the rear frame 3, and recesses A, A are formed on both sides of the intermediate frame 4. A horizontal frame 6 is fixed to the rear end of the rear frame 3, and the body 7 of the traveling vehicle body 1 is formed by these. A pair of axle housings 8 and 8 project outward from both sides of the gear box 5 and turn cases 9 and 9 are provided at the respective ends.
Is attached so as to rotate around the vertical axis 10 and 10,
Front wheels 11, 11 are provided on this.

A horizontal rod 12 is provided behind the horizontal frame 6 so as to rotate around a shaft 13 in the front-rear direction. 1
A pair of rear cases 14 and 14 are fixed to both ends of the horizontal rod 12,
Rear wheels 15 and 15 are attached to each. A mounting plate 16 is fixed to the lower central portion of the rear frame 3, and an engine 17 is mounted on the mounting plate 16. A cover plate 18 that also serves as a floor plate and a fender includes a gear box 5, front wheels 11, 11, and an engine 1.
It is attached to the machine body 7 by covering the front portions of the vehicle 7 and the rear wheels 15, 15, and a seat 19 is provided on the engine 17 and above the engine 17. A steering handle 20 is provided in front of it, and when the operator operates it, the front wheels 11, 11 are steered around the respective vertical axes 10, 10, and when this steering handle 20 is operated to the maximum, The rear end of the front wheel 11 enters the recess A so that a large cutting angle is given to the front wheels 11, 11 (FIG. 3).

A control wheel 21 is provided on the crankshaft of the engine 17, and a control belt 22 provided on the input shaft of the gear box 5 and a control belt 23 are wound around the control wheel 21 to rotate the engine 17 as a gear. It is installed in Box 5. The rotation is adjusted to a predetermined rotation speed by a transmission or the like in the gear box 5,
Front wheel 1 via transmission shaft in axle housing 8,8
1, 11 and the rear wheel 1 via the wheel transmission shafts 24, 24
5 and 15 are transmitted. The output shaft 25 is also rotated, and a predetermined part of the seedling planting device 2 is driven.

Fuel tank 26 of engine 17 is seat 19
It is provided horizontally below the cover plate 18. With this configuration, a large amount of fuel can be retained and continuous operation for a long time becomes possible. This fuel tank 2
When 6 is formed in a U shape when viewed from above and is arranged so as to surround the seat 19 (FIGS. 4 and 5), the volume of the tank is expanded and the stability is improved. Further, as shown in FIG. 6, the cross section of the cover plate 18 is formed in the middle downward direction under the seat 19, and the left and right portions 26a, 2 of the fuel tank 26 are provided under the left and right convex portions.
Placing 6b improves the aesthetics.

A pair of support columns 27, 27 extend upward from the horizontal frame 6 (or the horizontal rod 12) and a pair of upper and lower links 28, 2 are provided.
The tip of 9 is rotatably attached to this. The rear ends of the links 28 and 29 are rotatably attached to the mounting frame 30 in the vertical direction, and these form parallel links. The tip of the hydraulic cylinder 31 is attached to the rear frame 3, from which the piston rod 32 extends obliquely upward and upward, and the link 28
When the oil discharged by the pump is sent to the hydraulic cylinder 31, the piston rod 32 projects and the links 28 and 29 rotate counterclockwise, so that the mounting frame 30 is similar. The mounting frame 30 descends when the oil rises in a posture and the oil is returned to the tank.

The seedling planting device 2 is constructed as follows. A gear box 33 is swingably attached to the lower part of the attachment frame 30 by a rolling shaft in the front-rear direction. The seedling mounting table 34 is provided on the front of the table in a slanting upward direction, and is driven to reciprocate left and right by the rotation of the output shaft 25. Center float 3
5 and side floats 36, 36 on both sides of the vehicle body 1
It's designed to slide on the mud as it moves forward.
A pair of left and right transmission cases 37, 37 extend rearward from the gear box 33 under the rear end of the seedling stand 33, and swivel cases 38, 38 ... Are provided on both sides of each. A pair of planting rods 39, 39 are provided in respective turning cases 38, 38 ...
, The seedling receiving plate 40 provided at the rear end of the seedling mounting table 34 is alternately turned from top to bottom. That is, four mat seedlings are placed side by side on the seedling stand 33, and four sets of planting rods 39, 39 ... cut off one seedling from each mat seedling, and float 35, 3
The seedlings are transplanted to 4 rows on the mud surface where 6,36 are leveled.

[Brief description of drawings]

FIG. 1 is a side view of a seedling planting machine according to the present invention.

[Figure 2] Plan view

FIG. 3 is a plan view of part 1 thereof.

[Figure 4] Side view of another seedling planter

FIG. 5 is a plan view thereof.

FIG. 6 is a cutaway front view of the seat portion.

[Explanation of symbols]

 3 Rear frame 4 Intermediate frame 5 Gear box 7 Airframe 10 Vertical axis 11 Front wheel 15 Rear wheel 17 Engine 20 Steering handle A Recess

Claims (1)

[Claims] 1. A U-shaped rear frame 3 opened rearward when viewed from above and a front gear box 5 are connected by a rod-shaped intermediate frame 4 to form a machine body 7, so that both sides of the intermediate frame 4 are formed. A concave portion A is formed, an engine 17 and a pair of rear wheels 15 are arranged in the central portion and the rear portion of the rear frame 3, and a pair of front wheels 11 that are rotated around the vertical axis 10 and steered are used for steering. A traveling vehicle body which is arranged on both sides of the gear box 5 so that the rear end thereof can enter the recess A at the time.