JPH017614Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention has an engine disposed at the front of the aircraft, one steerable drive wheel disposed below the engine, and a drive wheel located behind the engine and driven. At the top of the wheel, there is provided a boarding and driving section that includes a steering handle, a seat, and a pair of left and right steps, and furthermore, a seedling planting device and a pair of left and right sliding grounding bodies are provided behind the boarding and driving section. The present invention relates to an engine exhaust section of a one-wheel riding rice transplanter, which is provided with a drive device for raising and lowering the seedling planting device from the ground by swinging the sliding grounding body.

In the one-wheeled riding rice transplanter mentioned above, installing the engine muffler upright at the front of the machine is dangerous when driving, and depending on the direction of the wind, the exhaust heat may reach the driver, worsening the operating environment. Conventionally, the exhaust port of the muffler for the engine was installed in front of the rotation axis of the drive wheel and lower than the passenger compartment to prevent engine exhaust gas and hot air from hitting the driver. (Refer to Japanese Unexamined Patent Publication No. 177610/1983).

Therefore, when turning in a deep field, if the sliding ground body is lowered relative to the aircraft and the seedling planting device at the rear of the aircraft is raised, the front of the aircraft will be lowered, causing the exhaust port to be submerged in water or It has the disadvantage of allowing mud to enter,
The disadvantage was that the muffler was easily damaged by coming into contact with other objects such as ridges and stones.

In view of the above points, the present invention protects the driver from being affected by exhaust gas, prevents the exhaust port from rushing into the field, and further protects the muffler from contact with other objects. The purpose is to

The characteristic structure of the engine exhaust section of the one-wheel riding rice transplanter according to the present invention is that the step support stay, which is installed diagonally across the outer end of the lower surface of the front step and the machine body, is bent outward to form an engine muffler. A space for installation is formed, and the exhaust of the engine muffler disposed within the space is disposed behind the rotation axis of the drive wheel, and its effects are as follows.

In other words, since the engine muffler is located below the step of the passenger compartment, the driver is prevented from being affected by exhaust gas and hot air.
Moreover, the exhaust port of the muffler is placed behind the rotation axis of the drive wheel, which is the center of longitudinal rotation of the aircraft.
By installing the sliding grounding body in a position that rises as the aircraft descends, it is possible to prevent the exhaust port from entering water or mud even in deep fields, preventing unexpected engine stoppages and muffler It is now possible to sufficiently prevent accidents and failures such as clogging and rust formation.

Furthermore, the step support stay, which is installed diagonally across the outer edge of the bottom surface of the step and the fuselage, is bent outward and the muffler is placed in the internal space, making it possible to tilt the aircraft forward. At this time, there is an advantage that the step support stay can be used to protect the muffler from coming into contact with other objects.

Next, an example of the present invention will be shown.

As shown in FIG. 1, the front part of the aircraft includes a steerable drive wheel 9, a seat 1, and a steering handle 2.
1, a boarding operation section 4 having a pair of left and right steps 11, and an engine 5,
At the rear of the machine, there is a seedling planting device 6 that is driven by an engine 5 and includes a seedling stand 6a, a seedling planting claw 6b, etc., and three vertically swingable floats 7a, 7b, and 7c for leveling the seedling planting area. , and a pair of left and right sliding grounding bodies 2 that can be driven up and down by hydraulic cylinders 8 to constitute a riding rice transplanter that supports the machine body through the cooperation of drive wheels 9 and sliding grounding bodies 2. The hydraulic cylinder 8 is automatically operated by a control valve (not shown) as the ground pressure of the float 7b changes.
It is configured to maintain the seedling planting depth within a set range.

As shown in FIGS. 2 to 4, the engine exhaust pipe 10 is arranged so as to extend from the engine 5 to the right side of the fuselage, then bent downward, and further bent toward the rear of the fuselage, and A step support stay 23 installed diagonally across the outer end of the step 11 and the fuselage body is bent outward and connected in communication with the muffler 12 disposed in the internal space.
2 is fitted with an exhaust pipe 14 so that the exhaust gas from the engine 5 is discharged toward the rear of the aircraft body from an exhaust port 19 on the rear side of the rotation axis P ₁ of the drive wheel 9. That is, heat radiation from the muffler 12 to the driver is prevented in step 11, and the exhaust port 19 is raised as the aircraft tilts forward to prevent mud from flowing into the exhaust port 19 during turns.

Two exhaust pipe covers 15, 15 with the same specifications,
They are bolted to a bracket 16 provided on the exhaust pipe 10 in different positions, thereby reducing the number of parts and preventing personal injury caused by the exhaust pipe 10.

As shown in FIG. 6, the exhaust pipe cover 15 is formed by welding a pair of cover components 15a and 15b which are press-formed sheet metal.

To fix the muffler 12 to the stem 11, a muffler cover 22 and two types of sheet metal mounting members 1 are required.
7a and 17b, and the sheet metal mounting members 17a and 17b are mounted with their width directions perpendicular to each other, and the muffler 12 is fixed with the mounting member 17a.
The other mounting member 17b is designed to prevent the muffler 12 from swinging in the longitudinal direction of the aircraft.

In order to attach the exhaust pipe 14 to the muffler 12, as shown in FIG. Holes 20 are provided in the portion 13 at three positions in the circumferential direction and into which the protrusions 18 are inserted, and the exhaust pipe 14 is rotated relative to the small diameter portion 13 and the protrusions 18 are selectively supplied to the holes 20. Therefore, the direction of the exhaust port 19 is configured to be able to be changed as appropriate depending on the wind direction and the work situation such as maintenance after getting off the vehicle.

Note that the muffler 12 can be modified in its structure, mounting configuration, etc. as appropriate.

Instead of the hydraulic cylinder 8 for the sliding ground body 2, various drive structures can be used, and these are collectively referred to as the drive device 8.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of the engine exhaust section of the one-wheel riding rice transplanter according to the present invention, FIG. 1 is an overall side view of the one-wheel riding rice transplanter, FIG. 2 is an exploded perspective view of the engine exhaust section, and FIG. 3 is a muffler. Fig. 4 is a partially cutaway side view showing the mounting structure, Fig. 4 is a partially cutaway front view showing the muffler mounting structure, Fig. 5 is a partially cutaway sectional view showing the exhaust pipe mounting structure, and Fig. 6 is a partially cutaway side view of the exhaust pipe cover. It is a figure showing a manufacturing method. 1...Seat sheet, 2...Sliding ground body, 4...
Boarding operation section, 5... Engine, 6... Seedling planting device, 8... Drive device, 9... Drive wheel, 11...
Step, 12...muffler, 19...exhaust port,
21... Steering handle, 23... Step support stay, P ₁ ... Wheel rotation axis.

Claims (1)

[Scope of utility model registration request] An engine 5 is disposed at the front of the aircraft body, and one steerable drive wheel 9 is disposed below and behind the engine 5. Behind the engine 5 and above the drive wheel 9, a steerable drive wheel 9 is disposed. A boarding/driving unit 4 is provided which is equipped with a steering wheel 21, a seat 1, and a pair of left and right steps 11, 11. Further, behind the boarding/driving unit 4, a seedling planting device 6 and a pair of left and right sliding ground bodies 2 are provided.
In the one-wheel riding rice transplanter, which is provided with a driving device 8 for raising and lowering the seedling planting device 6 from the ground by swinging the sliding grounding body 2, the outer end of the lower surface of the step 11 and The step support stay 23 installed diagonally across the fuselage is bent outward to form a space for arranging the engine muffler 12, and the exhaust port of the engine muffler 12 is disposed within the space. An engine exhaust section for a one-wheel riding rice transplanter, characterized in that the engine exhaust section 19 is disposed rearward of the rotation axis _P1 of the driving wheel 9.