JPS62163825A - Tractor - Google Patents

Abstract

PURPOSE:To place the center of gravity in a low position in the whole unit of a tractor and to reduce its total height so as to improve workability, by providing a fuel tank to be arranged in the rear of a seat further an engine and a transmission to be arranged in the rear of the fuel tank, in case of the tractor driving four wheels. CONSTITUTION:A tractor 12 is equipped in its car body 2 with front wheels 3 and rear wheels 4, further the tractor 12 provides a seat 10 between the front wheels 3 and the rear wheels 4 while a handle device 11 in the front of the seat 10. In the above constitution, the tractor provides a fuel tank 14 to be arranged in the rear bottom part of a back leaning part of the seat 10 further an engine 5 to be arranged laterally neighboring to the rear of the fuel tank 14. And the tractor provides a transmission 6 to be arranged neighboring to the rear of the engine 5. While the longitudinally extending second propeller shaft 8 is connected in the bottom part of the car body 2 between the transmis sion 6 and a front differential gear 9. In this way, the front wheels 3 and the rear wheels 4 can be both driven by the engine 5.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a tractor.

[Conventional technology]

As shown in FIG. 1, for example, a conventional four-wheel drive tractor 1 includes front wheels 3 and rear wheels 4 on the left and right sides of the front and rear parts of a vehicle body 2, and an engine 5 and the like disposed in the front of the vehicle body. , a transmission 6 is disposed at the rear of the vehicle body. The power of the engine 5 is transmitted to the transmission 6 by a first propeller shaft 7 disposed at the bottom of the vehicle body 2 and extending longitudinally, and the rear wheels 4 are driven via a rear differential gear and a rear differential gear. . In addition, the power of the engine 5 is transmitted from the transmission 6 to the front differential gear 9 and the front final gear by a second propeller shaft 8 that is disposed below the first propeller shaft 7 and extends back and forth under the vehicle body 2. Front wheels 3 are driven. A seat 10 is arranged above the transmission 6 at the rear of the vehicle body 2, and a seat IO
A handle 211 is provided in front of the handle.

[Problem that the invention seeks to solve]

In this manner, the conventional four-wheel drive tractor 1 has an engine 5 disposed at the front of the vehicle body 2 and a transmission 6 at the rear.
Since the seat 10 is disposed, devices such as the seat 10 are disposed at a high position, and the center of gravity of the entire tractor 1 including the human (operator) becomes high, and the vehicle height also becomes high.

Furthermore, since two propeller shafts 7.8 are provided at the bottom of the vehicle body 2 and are spaced apart from each other in the vertical direction, the minimum ground clearance is increased.

Furthermore, if the front part of the vehicle body 2 is to have a slant nose style, it is necessary to reduce the height of the engine 5, which causes difficult problems in engine design with the conventional structure.

Furthermore, since the seat 10 is installed at a high position, it is not easy to get on and off the vehicle.

The present invention has been made in view of the above circumstances, and aims to solve the above problems and provide a tractor with excellent workability.

[Means for solving problems]

To achieve the above object, the present invention is characterized in that, in a four-wheel drive tractor, a fuel tank is disposed behind the seat, and an engine and a transmission are disposed behind the fuel tank.

[Effect]

Since the engine, transmission, and other devices are located behind the seat, the seat and other devices can be placed in a lower position, lowering the center of gravity of the entire tractor including the human (operator), and lowering its overall height. can. Additionally, since the engine and transmission can be placed adjacent to each other, there is no need for a propeller shaft that connects the engine and transmission. Therefore, in four-wheel drive tractors, the propeller shaft is the propeller shaft that is installed between the transmission and the front differential gear. There is only one, and the minimum ground clearance can be lowered. Furthermore, since the fuel tank is disposed between the seat and the engine, which is the position around the engine where vibrations are least, the fuel tank is less susceptible to engine vibrations. Further, by providing a fuel tank between the seat and the engine, which is a vibration source, engine vibrations are not directly transmitted to the seat.

〔Example〕

As shown in FIGS. 2 and 3, the tractor 12 includes front wheels 3 and rear wheels 4 on the left and right sides of the front and rear parts of the vehicle body 2,
A seat 10 is located near the front wheel 3 between the front wheel 3 and the rear wheel 4.
is arranged, and a handle device II is provided in front of the seat 10.
will be provided. A fuel tank 14 is disposed at the rear lower part of the backrest 13 of the seat 10, and an engine 5 is disposed horizontally adjacent to the rear of the fuel tank 14.

A transmission 6 is disposed adjacent to the rear of the engine 5, and the power of the engine 5 is directly transmitted to the adjacent transmission 6 to drive the rear wheels 4 via a rear differential gear and a rear final gear. In addition, a second propeller shaft 8 extending longitudinally at the bottom of the vehicle body 2 is connected between the transmission 6 and the front differential gear 9, and the power of the engine 5 is transmitted from the transmission 6 to the front differential gear 9 and the front differential gear 9. The signal is transmitted to the front wheels 3 via the final gear, and the front wheels 3 are driven. A radiator 15 is disposed above the transmission 6, and an air cleaner 16 is disposed above the radiator 15.

In this way, this four-wheel drive tractor 12 has a seat 10
The engine 5, transmission 6, etc. are placed behind the engine 5, and there is no conventional propeller shaft between the engine 5 and the transmission 6, and a single propeller shaft 8 is placed between the transmission 6 and the Luga 9 during the front differential arrangement. Since the seat 10 and the like can be arranged at a low height, the center of gravity of the entire tractor 12 is low, and the overall height of the tractor 12 is also low.

Note that in the case of rear two-wheel drive, the second propeller shaft 8 is also eliminated.

The tractor 17 shown in FIGS. 4 and 5 has an integrated engine and transmission 18 disposed between the rear wheels 4 behind the fuel tank 14, an air cleaner 16 in the front part above, and a radiator in the rear part. 15 are arranged,
Other configurations are similar to the tractor 12 shown in FIGS. 2 and 3 above. In this case as well, the center of gravity of the entire tractor 17 is low and the overall height is also low, as described above.

[Effects of the Invention] As explained above, according to the present invention, since the engine, transmission, etc. are disposed on the a side of the seat, devices such as the seat can be disposed at a low position, and therefore the center of gravity is low. Creates a stable tractor.

Additionally, since the engine and transmission can be placed adjacent to each other, there is no need for a propeller shaft that connects the engine and transmission, and the minimum ground clearance can be lowered. Therefore, seats and the like can be placed at low positions. Also,
Since only one propeller shaft is required, the weight of the tractor can be reduced.

Furthermore, even with a cabin (including a safety frame) attached, the overall height can be lowered, making it suitable for work inside a greenhouse or in an orchard. Specifically, the ceiling height inside the house can be lowered, which reduces construction costs, and because the volume inside the house is reduced, maintenance costs such as heating costs can be reduced. Further, work can be easily carried out even in orchards with many slopes. Furthermore, due to the structure of this tractor, the vehicle body can be shaped with few convexities so as not to interfere with fruits, branches, leaves, etc.

In addition, since the engine is located behind the seat, there is no problem with the engine height even when the front of the vehicle is set to a slant nose style, allowing greater freedom in engine design and styling of the front of the tractor. Become.

Furthermore, since the seat can be installed at a lower position, the tractor can be easily ridden and alighted.

Furthermore, since the fuel tank is disposed between the seat and the engine, which is the position around the engine where vibrations are least, the fuel tank is less susceptible to engine vibrations.

Further, by providing a fuel tank between the seat and the engine, which is a vibration source, engine vibrations are not directly transmitted to the seat.

[Brief explanation of drawings]

FIG. 1 is a front view showing the structure of a conventional tractor, FIG. 2 is a front view showing the structure of a tractor according to the present invention, FIG. 3 is a plan view thereof, and FIG. 4 is a front view showing the structure of a tractor according to the present invention. The front view shown in FIG. 5 is a plan view of the same. 3 is a front wheel, 4 is a rear wheel, 5 is an engine, 6 is a transmission, 8 is a propeller shaft, 9 is a front differential gear, 10 is a seat, 11 is a steering wheel device, 1
2.17 is a tractor, 14 is a fuel tank, and 18 is an integrated engine and transmission device.

Claims (1)

[Claims] A four-wheel drive tractor, characterized in that a fuel tank is disposed behind the seat, and an engine and transmission are disposed behind the fuel tank.