JP2006347494A - Agricultural working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an agricultural working vehicle capable of ensuring the capacity of a fuel tank of the agricultural working vehicle such as a tractor, and smoothly feeding a fuel to an engine even in a work on an inclined ground in the right-to-left direction. <P>SOLUTION: A steering seat (16) is provided on a substantially center position of right and left crawler type traveling devices (12, 12), and the traveling devices (12, 12) are covered by fenders (17, 17) on right and left sides of the steering seat (16). Fuel tanks (18, 18) are internally provided in the right and left fenders (17, 17), and the right and left fuel tanks (18, 18) are communicated with each other by a connection pipe (19). Discharge ports (18b, 18d) which are longitudinally deviated in position are formed in bottom parts of the right and left fuel tanks (18, 18), and the fuel is fed from the ports (18b, 18d) to an engine (27) via hose members (24, 26). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a configuration of an agricultural work vehicle such as a tractor having a fuel tank on either side of a vehicle body or a riding rice transplanter.

In agricultural work vehicles, the horizontal direction from the top of the main frame at the center in the left-right direction is covered with a floor, a fuel tank made of synthetic resin material is provided on the side of the main frame below the floor, and the lower surface of the fuel tank is covered with a lower cover It is well known to cover and cover approximately half of the exposed side surface of the fuel tank with a side cover (Patent Document 1).
JP-A-8-11556

  In the prior art, the left and right fuel tanks are arranged below the floor between the front and rear wheels, so the tank capacity is limited due to the ground clearance, and the lower part of the fuel tank is exposed. Since it was in a state, there was a problem that it was damaged by an obstacle.

According to the present invention, a cockpit (16) is provided at a substantially central position of the left and right traveling devices (12, 12), and the traveling devices (12, 12) are provided by fenders (17, 17) on both left and right sides of the cockpit (16). 12), the fuel tanks (18, 18) are installed in the left and right fenders (17, 17), and the left and right fuel tanks (18, 18) are connected to each other by the connecting pipe (19). The fuel tank (18, 18) has a configuration in which fuel is sent to the engine (27) via the hose members (24, 26) from the outlets (18b, 18c, 18d) in which the front and rear positions of the bottom of the fuel tank (18, 18) are shifted. Agricultural work vehicle.
(Operation of the invention)
According to the above configuration, the fuel in the fuel tanks (18, 18) provided in the left and right fenders (17, 17) is opened at the bottom of the left and right fuel tanks (18, 18) while shifting the front-rear direction. Are taken out from the take-out ports (18b, 18c, 18d) and sent to the engine (27) via the hose members (24, 26).

  Accordingly, in the present invention, since the left and right fuel tanks (18, 18) are disposed below the left and right fenders (17, 17), the capacity of the fuel tank (18, 18) can be secured. The left and right fuel tanks (18, 18) are isolated from the obstacles on the ground by the left and right traveling devices (12, 12) and the traveling transmission device, so that they do not collide with the obstacles. (18, 18) is provided with outlets (18b, 18d) shifted in the front-rear direction so that fuel can be smoothly supplied to the engine even when the vehicle body is tilted forward, backward, left-right due to crossing over or on a slope. Can do.

The present invention will be described below with reference to the drawings.
1 is an overall side view of a tractor 1 as an example of an agricultural work vehicle, FIG. 2 is a side view of an essential part of the present invention, FIG. 3 is a plan view of the essential part, and FIG. A rear view is shown.

  The tractor 1 includes an engine frame 2 to which an engine E is attached at the front of the vehicle body, and a front mission case 7 and a rear mission case 3 are connected to the rear of the frame. Axle cases 8 and 8 are attached to the left and right sides of the rear transmission case 3, and traveling transmission shafts 9 and 9 are mounted in the axle cases 8 and 8. Drive sprockets 11 and 11 are attached, and left and right crawler type traveling devices 12 and 12 are provided.

  A steering handle 14 is mounted on the upper portion of the steering post 13 in front of the cockpit 16, and by operating the steering handle 14, a transmission (not shown) provided in the axle case 8 is hydraulically operated. The crawler type traveling devices 12 and 12 are adjusted to adjust the rotation ratio and steer. The upper surface of the front mission case 7 is covered with a floor 10, a clutch pedal 51, a brake pedal 52 and an accelerator pedal are provided on the floor 10, and a boarding / alighting step 15 is provided in front of the front end of the floor 10.

  Further, a rotary tiller 32 is connected to the rear end of the rear mission case 3 through a hitch 31 so as to be vertically rotatable by a so-called 2P method. Further, an elevating cylinder S1 is provided at the upper part of the rear mission case 3, and a lift arm 34 that pivots up and down between the left and right lower parts of the safety frame 20 by the expansion and contraction of the cylinder S1 is pivoted and connected to the lift arm 34. Various working machines, in the illustrated example, the rotary tiller 32 is lifted and lowered via the lift rod 36.

  Further, a cockpit 16 is provided above the central portion in the left-right direction of the rear mission case 3, and left and right fenders 17, 17 are provided on both left and right sides of the rear mission case 3, so that the rear side of the crawler type traveling devices 12, 12. The upper part is covered. The left and right fenders 17 and 17 are constituted by an upper surface cover 17 a located above the crawler type traveling device 12 and a side cover 17 b located on the left and right outer sides of the cockpit 16 and inside the crawler type traveling device 12. The fuel tanks 18 and 18 having substantially the same left and right shapes are disposed below the upper surface cover 17a and on the outer side of the upper half of the side cover 17b, and left and right fenders via the front and rear left and right lower brackets 21 and 21 and the left and right upper brackets 22 and 22, respectively. 17, 17 and the left and right fuel tanks 18, 18 are supported by bolts on the rear mission case 3 and the front mission case 7 through bracket members.

  In the tractor 1, as viewed from the side, the fuel tanks 18 and 18 are provided in the upper half of the side cover 17b of the fenders 17 and 17, and the bottom surface of the left fuel tank 18 is compared with the bottom surface of the right fuel tank. It is arranged at a low position by H, and the rear upper parts of the crawler type traveling devices 12, 12 correspond to the lower half of the side cover 17b.

  A fuel supply port 18a is provided on the upper surface of the left fuel tank 18. The left and right fuel tanks 18 and 18 are accommodated in the upper surface covers 17a and 17a in the lateral direction of the fenders 17 and 17 in a plan view, and in a side view. The fenders 17 and 17 are configured to be accommodated in the side covers 17b and 17b in the vertical direction.

  In addition, pipe attachment holes 19a and 19a are formed at opposite positions on the inner surfaces of the lower rear portions of the left and right fuel tanks 18 and 18, and the space between the left and right pipe attachment openings 19a and 19a is routed below the cockpit 16. The fuel pipes 18 and 18 are connected by a connecting pipe 19 so that the fuel in the left and right fuel tanks 18 and 18 can move relative to each other.

  Also, a left front outlet 18b and a left rear outlet 18c are provided at the bottom of the left fuel tank 18, while the left and right left outlets 18c are located at the same position in the front and rear as viewed from the side. That is, the right outlet 18d is provided at a position shifted forward and backward from the left front outlet 18b. These fuel outlets 18b, 18c, 18d are connected to respective fuel hoses 24, 24..., Each hose 24 is connected through two joints 4, 4, and the joined fuel is connected to the relay fuel hose 26. Through which the engine E is supplied. The upper surfaces of the left and right fuel tanks 18 and 18 are communicated with each other by a breather hose 28 so that air pushed out from the tank is released to the safety frame 20 base of the tractor 1.

  As described above, since the left and right fuel tanks 18 and 18 are disposed below the left and right fenders 17 and 17, the capacity of the fuel tanks 18 and 18 can be secured, and the fender 17 and the fuel tank 18 can be secured. By sub-assembling and attaching to the tractor 1, the assembling work can be made efficient. In addition, since the left and right fuel tanks 18 and 18 are connected by a connecting pipe 19 having a diameter larger than that of the fuel hose 24, the heat balance of the fuel tanks 18 and 18 is improved, and the left and right fuel tanks 18 and 18 are connected to each other. Since fuel outlets 18b, 18c, and 18d are distributed in the front, rear, left, and right, fuel can be smoothly supplied to the engine even when the vehicle body is tilted forward, backward, left, or right on a shore or on a slope.

Next, the configuration of the getting-on / off step 15 will be described with reference to FIG.
A frame 41 extending downward is attached to the front end of the engine frame 2, and the frame 41 has vertically elongated holes 42, 42 opened at two front and rear positions. .. Are formed at predetermined intervals in the vertical direction. The mounting plate 43 is attached to the locking grooves 42a, 42a of the long holes 42, 42 of the frame 41 by using bolts / nuts 44, 44 so as to be adjustable in the vertical direction. Further, the mounting plate 15b of the getting-on / off step 15 is formed with mounting holes 15c, 15c in the vertical direction on the front and rear sides, and vertical support rods 46, 46 are provided on the front and back of the inner side of the getting-on / off step 15, respectively. The springs 47 and 47 are interposed. Further, the front and rear end portions of the getting-on / off step 15 are configured with guide portions 15a, 15a curved upward,

  Then, the mounting pins 48, 48 on the front and rear of the mounting plate 43 are engaged with the mounting long holes 15 c, 15 c of the mounting plate 15 b on the loading / unloading step 15 side to support the loading / unloading step 15 so as to be movable up and down. In this supported state, the upper end portions of the support rods 46 and 46 are fitted and supported in the holes 43a and 43a on the mounting plate 43 side, and the boarding / exiting step 15 is pressed downward by the springs 47 and 47.

  With the above-described configuration, the step 15 can be disposed downward by the length of the long hole 15c of the mounting plate 15b for mounting / dismounting the step 15 so that it can be easily boarded / exited. Even if there is a collision, the getting-on / off step 15 can be retracted upward by the guide portions 15a, 15a to prevent breakage, and even if the feet are slid in the getting-on / off step 15, resistance is applied on the upper surfaces of the guide portions 15a, 15a. It is safe because it can prevent falling.

Next, another embodiment of the accelerator pedal 53 provided on the floor 10 will be described with reference to FIG.
Further, the tractor 1 is configured such that the rotational speed of the engine E can be adjusted by an accelerator pedal 53 provided on the floor 10 and a throttle lever (not shown) provided in the vicinity of the steering handle 14. The floor 10 is provided with a recess 10a, the accelerator pedal 53 is pivotally supported 53a at the rear end of the recess 10a, and the accelerator pedal 53 is rotated upward, and the storage accommodated in the recess 10a. When the accelerator pedal 53 is placed in the retracted state, the floor 10 and the upper surface of the accelerator pedal 53 are configured to be flush with each other. And it connects with the speed control part of the engine E through the interlocking rod 54 and the interlocking | linkage arm 56 which were pivotally connected with the front-end | tip part of the accelerator pedal 53.

  According to the above configuration, when the throttle lever (not shown) is used and the accelerator pedal 53 is not used, the interlock rod 54 and the interlock arm 56 are disengaged as shown in FIG. The dull 53 is housed in the recess 10a, and the driving operation can be performed with the operator's feet widened.

Next, another lifting device provided at the rear part of the rear mission case 3 will be described with reference to FIG.
The rotary tiller 32 is connected by the 3P method by the upper link 37 and the left and right lower links provided at the rear part of the machine body, and the lower link (not shown) is lifted and lowered by the lift rod (not shown) connected to the lift arm 34 to rotate the rotary tillage. The apparatus 32 is configured to move up and down. A lift case 33 is attached to the rear mission case 3, and a bracket 38 is attached to the inner part of the left and right lift arms 34, 34 at the center in the left-right direction on the rear upper surface of the lift case 33 so as to protrude upward. An upper link hook 39 made of a spring material is attached to the tip of the bracket 38. The upper link hook 39 has a distal end portion that is formed with a laterally recessed portion 39a to hold the upper link 37.

  Thus, when the upper link 37 rotated upward is engaged and held in the recess 39a of the upper link hook 39, the upper link 37 can be reliably held while restricting the swinging in the front-rear direction.

The whole tractor side view. The side view of the principal part of a tractor. The top view of the principal part of a tractor. The rear view of a fuel tank part. (A) The side view of a step part. (B) The rear view of a step part. The side view of the accelerator pedal of another form. The perspective view which shows the working machine raising / lowering apparatus of another form.

Explanation of symbols

E engine 1 tractor 12 crawler type traveling device 16 cockpit 17 fender 18 fuel tank 19 connecting pipe 18b outlet 18c outlet 18d outlet 24 fuel hose 26 relay fuel hose

Claims (1)

A cockpit (16) is provided at a substantially central position of the left and right traveling devices (12, 12), and the traveling devices (12, 12) are covered with fenders (17, 17) on both left and right sides of the cockpit (16). The left and right fenders (17, 17) are equipped with fuel tanks (18, 18), and the left and right fuel tanks (18, 18) are connected to each other by a connecting pipe (19). 18, 18) An agricultural work vehicle characterized in that fuel is sent to the engine (27) via the hose members (24, 26) from the outlets (18b, 18d) whose front and rear positions are shifted at the bottom.

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