JPS6031938Y2 - Tractor operating structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tractor operating structure that is provided with an accelerator lever and a lifting lever that adjusts the lifting and lowering of a working device that is attached to the machine body so as to be able to rise and fall.

With this operating structure, when working with the work equipment lowered, the accelerator is increased to increase the engine output, and conversely,
When not working with the work equipment raised, both levers are often operated in succession in conjunction with each other, such as by lowering the accelerator to save fuel and reduce engine noise. In the past, the levers were placed far apart, making it difficult to change the lever quickly and making it difficult to handle.

The present invention is an attempt to solve the above-mentioned problem.The engine is placed in front of the aircraft, the transmission case is placed behind it, and the pilot seat is placed between a pair of left and right rear wheels. The transmission case is placed between the fenders so that it is offset to the fender side opposite to the side on which it is offset, creating a gap between the fender and the fender on the side closer to the mission case. It is characterized by having an accelerator lever on the side and a lifting lever for adjusting the raising and lowering of a working device that is attached to the aircraft so that it can be raised and lowered, and a rotary handle for steering the front wheels in front of the center of the control seat. In other words, since it is equipped with an accelerator lever and a lifting lever, when operating both levers in succession in relation to each other as described above, it is possible to quickly change the grip of the lever with one hand. Both levers could be operated well, which successfully solved the drawbacks of the previous model and achieved the desired objective.

In this way, the present invention places both levers in the gap formed between the operator's seat and one of the fenders, and on the sides of this seat. Compared to a lever that is exposed to the side, etc., there is no risk of unexpected injury or damage to the lever due to the lever or hand coming into contact with other objects during operation, and both levers are exposed to the operator's body. Because it is located right next to the lever, there is no need to operate the lever in an unreasonable position, and it has special effects such as being able to operate the lever easily and reliably.

Moreover, in order to provide each lever in the gap created between the seat that is shifted to the opposite side from the side where the mission case is shifted and the fender on the side closer to the mission case, various operating tools inside the mission case are provided. These levers can be connected straight, but for example, if a seat is installed above the transmission case, the levers must be bent, and as a result, multiple lever operation ranges interfere with each other, resulting in layout constraints. Compared to those that adopt linkage structure means such as complicated links to avoid or avoid receiving
This has the advantage of simplifying the structure for interlocking connection.

Additionally, since there are no engines or other equipment in front of the seat, forward visibility is good and safe and nimble maneuvering is possible.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 shows a side view of the offset type tractor, and FIG. 2 shows a plan view, showing a pair of left and right front wheels 1a.

lb, a pair of left and right rear wheels 2a and 2b are installed, and an engine 3 and a transmission case 4 for traveling that is long in the longitudinal direction are mounted on the left side between the left and right wheels, and the engine 3 and the mission case 4 for traveling, which are long in the longitudinal direction, are installed on the left side from the center of the left and right sides of the aircraft. are arranged side by side in the direction, and are offset to the right between the left and right rear wheels 2a, 2b, that is,
Left and right rear wheels 2a.

A pilot seat 5 is located between the fenders 2A and 2B of the vehicle 2b and shifted toward the right fender 2B.
A gap S is formed between the seat 5 and the left fender 2A.

The left and right front wheels 1 aelb are configured as steering wheels whose direction can be changed by a rotary bundle 6 provided in front of the center of the seat 5 .

The left and right rear wheels 2a, 2b are configured to be pivotally supported by the rear end of the transmission case 4 and driven by the output within the transmission case.

A first hydraulic cylinder is provided at the upper part of the rear end of the mission case 4 (corresponding to the lower part of the seat 5) for raising and lowering a working device (not shown) connected to the rear of the aircraft body using a lift arm 7.7. Case 8a of No. 8 is assembled and fixed, and along the left side surface of mission case 4, a working device (not shown) connected to the longitudinally intermediate portion of the fuselage is attached via wrist arms 9, 9. A second hydraulic cylinder 10 is provided which is operated to move up and down.

As shown in FIGS. 3 to 6, a governor 11 (see FIG. 2) of the engine 3 is placed within the gap S formed on the left side of the pilot seat 5 and on the side of the seat 5. An accelerator lever 12 that adjusts and sets the engine rotation speed, and a first lifting device that operates the control valve 13 of the first hydraulic cylinder 8 to adjust the lifting and lowering of the working device suspended and supported by the lift arm 7.7. a lever 14, a second lifting lever 1 that operates the control valve 15 of the second hydraulic cylinder 10 to adjust the lifting and lowering of the working device suspended and supported by the lift arms 9, 9;
6 are juxtaposed.

The accelerator lever 12 is fixed to the left end of an upper horizontal shaft 18 that is supported on the projecting end of an auxiliary bracket 17 that projects forward from the top of the cylinder case 8a. An arm 19 fixed to an end is linked to the governor 11 via a link mechanism 20 provided on the upper part of the transmission case 4, and is configured to increase the accelerator as the lever 12 is operated forward.

The first lifting lever 14 is connected to the auxiliary bracket 17.
An arm 22 is fixed to the left end of a lower horizontal shaft 21 supported on the projecting end of the control valve 13, and an arm 22 attached to the right end of the horizontal shaft 21 is linked to the operating arm 13a of the control valve 13 via a rod 23. There is.

When the lever 14 is operated forward, the working device is lowered, and when the lever 14 is operated backward, it is raised.

The second lifting lever 16 is pivotally supported at the front part of the control valve 15 so as to be able to swing back and forth, and is connected to the control valve 15 and the hydraulic cylinder 10 via a feedback link mechanism 24.
The lever 16 is connected to the lever 16 so that the more the lever 16 is swung forward, the lower the working device is.

In addition, 25 in the figure indicates each of the levers 12. 14. There are 16 guide frames.

In addition, in carrying out the present invention, the accelerator lever 12 and the lifting lever 14, 16 should be swung in the same direction, and
If the operating direction on the accelerator up side and the operating direction on the lowering side of the work equipment are made to match, the operating direction of the lifting levers 14 and 16 and the operating direction of the accelerator lever 12 when raising and lowering the working equipment will match. , it is easier to handle and more convenient.

[Brief explanation of the drawing]

The drawings show an embodiment of the operating structure of a tractor according to the present invention, in which FIG. 1 is a side view of the tractor, FIG. 2 is a circumferential plan view, and FIG.
The figure is a side view of the lever mounting part, FIG. 4 is a plan view thereof, FIG. 5 is a front view thereof, and FIG. 6 is a diagram showing the relationship between the second lifting lever and the second hydraulic cylinder. 2A, 2B...Fender, 1a, 1b...
...Front wheel, 2a, 2b...Rear wheel, 3...
...Engine, 4...Mission case, 5.
...Control seat, 6-turn steering wheel, 12...
・Accelerator lever 114... Lifting lever, S
...Void.

Claims (1)

[Scope of Claim for Utility Model Registration] ■ The engine 3 is placed in front of the aircraft, shifted to one side from the left and right center of the aircraft, and the mission case 6 is placed behind it. fender 2A, 2
B, the transmission case 4 is disposed offset to the side of the fender 2B opposite to the side on which the transmission case 4 is biased, and a gap S is formed between the fender 2A and the fender 2A on the side closer to the mission case.
An accelerator lever 12 and a lift lever 14 are provided beside the pilot seat 5 within the space S, and a lifting lever 14 is provided to adjust the elevation of a working device that is attached to the aircraft body so as to be able to move up and down. 1a. 1b A tractor operating structure characterized in that a rotating handle 6 for steering is provided. (2) The tractor according to claim 2, wherein each of the levers 12 and 14 is operated to swing in the same direction, and the operating direction on the accelerator up side and the operating direction on the lowering side of the working device are made to match. operation structure. ■ Each of the levers 12 and 14 is operated to swing in the front-back direction.Utility model registration claim item () or item ()
The operating structure of the tractor described in Section.