JP2011168237A - Tractor - Google Patents

Abstract

In a tractor provided with a fuel tank at the rear of an engine, the fuel tank capacity is increased as much as possible, and entry of the fuel tank into an operation panel is easily avoided.
In a fuel tank, a lower end side located at a lower arrangement height than an upper end side portion at a front end side of an upper end side portion located at an arrangement height higher than an arrangement height of an engine of a tank body. A protrusion 34 that protrudes forward of the vehicle body with respect to the portion 33 is provided. The vehicle body rearward facing surface 35 of the tank main body 30a is set as a vehicle body vertical facing surface along the side surface 25b of the driving cabin front wall 25 on the inner side of the driving cabin. The front end side of the projecting portion 34 is positioned above the engine 11 in a state of projecting to the front side of the vehicle body from the rear end 11a of the engine 11, and the position of the vehicle body rearward facing surface 35 in the front-rear direction of the vehicle body and the front wall 25 of the driving cabin. The fuel tank 30 is installed in a state where the position in the vehicle body longitudinal direction is the same or substantially the same.
[Selection] Figure 4

Description

  The present invention relates to an tractor including an engine provided at a front portion of a vehicle body, a steering wheel located behind the engine, and an operation cabin.

  In the above-described tractor, a fuel tank for the engine may be provided at the rear of the engine, as conventionally described in, for example, Patent Document 1.

JP 2009-12609 A

  In the case of a tractor provided with a fuel tank at the rear of the engine, conventionally, when a fuel tank configured to have a tank rear side portion protruding from the front wall of the driving cabin to the inside of the driving cabin is adopted, the tank rear side portion is It has entered a state where it has entered a wide range inside the operation panel, and it has been difficult to secure a space for arranging the electric wires for various meters provided on the operation panel, the handle shaft connected to the steering wheel, and the like inside the operation panel. When it was easy to secure a space for arranging the electric wire, the handle shaft, etc., it was necessary to enlarge the operation panel, and the internal space of the operation cabin occupied by the operation panel was increased.

  An object of the present invention is to provide a tractor that is easy to avoid entering the operation panel of the fuel tank while providing the fuel tank behind the engine and increasing the capacity of the fuel tank as much as possible.

The first aspect of the present invention is a tractor including an engine provided at a front portion of a vehicle body, a steering wheel located behind the engine, and an operation cabin.
In a fuel tank for the engine, on a front end side of an upper end side portion located at a higher placement height of the engine than a placement height of the engine, on a lower end side portion located at a lower placement height than the upper end side portion. On the other hand, a protruding part that protrudes toward the front of the vehicle body is provided.
A notch part in which the tank main body of the fuel tank enters the front wall of the driving cabin, and a vehicle body rearward facing surface of the tank main body along a side surface on the driving cabin inward side of the front wall of the driving cabin. Set it to face up and down,
The front end side of the projecting portion is located above the engine in a state of projecting to the front side of the vehicle body from the rear end of the engine, and the position in the vehicle front-rear direction of the vehicle body rearward surface and the front wall of the driving cabin The fuel tank is installed in a state where the position in the vehicle body longitudinal direction is the same or substantially the same.

  According to the configuration of the first aspect of the present invention, the fuel tank can be provided at the rear of the engine in a state where the rear portion of the fuel tank does not protrude so much from the front wall of the operation cabin to the inside of the operation cabin. By preventing the fuel tank from projecting too much inside the driving cabin, the tank capacity is reduced by a projecting portion projecting to the front of the vehicle body from the rear end of the engine above the engine on the upper end side of the tank body, The capacity of the fuel tank can be maximized.

  Therefore, while the fuel tank is provided at the rear of the engine and the capacity of the fuel tank can be made as large as possible to store a large amount of fuel, the protrusion of the fuel tank to the inside of the operating cabin is reduced. In addition, it is possible to easily secure the space for arranging the electric wire, the handle shaft, etc. inside the operation panel to facilitate the assembly work, or to make the operation panel small and widen the living space in the operation cabin as much as possible.

  In the second aspect of the invention, the vehicle body rearward facing surface of the tank body and the side surface of the front wall of the driving cabin on the inner side of the driving cabin are overlapped in a side view of the vehicle body.

  According to the configuration of the second aspect of the invention, when the fuel tank is provided in a state where the rear side of the tank main body does not protrude inside the operation cabin, the vehicle body rearward facing surface of the tank main body can be positioned close to the operation cabin. Since the tank body rearward facing surface is located at the limit, the size of the tank body in the longitudinal direction of the vehicle body can be maximized so that the capacity of the fuel tank is maximized.

  Therefore, while the fuel tank is provided in a state that does not protrude inside the operation cabin, the capacity of the fuel tank is maximized in view of the size of the tank body in the longitudinal direction of the vehicle body, and as much fuel as possible is provided. Can be stored.

  In the third aspect of the present invention, a support body is provided that is erected upward from the front wheel support frame extending from the lower part of the engine toward the front of the vehicle body, and the upper surface of the rear end side portion of the bonnet that houses the engine is The bonnet is supported by the support body in a state of being positioned at a higher arrangement height than the upper end of the protruding portion of the fuel tank.

  According to the configuration of the third aspect of the invention, even if the size of the projecting portion of the fuel tank is increased in the vertical direction of the vehicle body so that the capacity of the fuel tank is increased, the size of the engine in the vertical direction of the vehicle body is relatively small. Even if the bonnet is used, the bonnet is supported by being lifted by the support, and the bonnet is positioned at an appropriate height corresponding to the height of the fuel tank, and the hood and engine body The bonnet can be installed with a wide clearance in the direction.

  Therefore, even if the capacity of the fuel tank is increased by the size of the protruding portion of the fuel tank in the vertical direction of the vehicle body, an engine bonnet having a relatively small size in the vertical direction of the vehicle body is adopted, or a small class model is used. By using a common engine bonnet, the engine and various devices in the prime mover can be appropriately accommodated at low cost.

It is a side view which shows the whole tractor. It is a vertical side view which shows a drive part. It is a top view which shows a drive part. It is a side view which shows the installation state of a fuel tank. It is a vertical side view which shows the site | part in which the motive power taking-out shaft is arrange | positioned. It is a rear view which shows the site | part in which the motive power taking-out shaft is arrange | positioned. It is a perspective view which shows a cover body.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a side view showing an entire tractor according to an embodiment of the present invention. As shown in this figure, the tractor is configured to be self-propelled by a pair of left and right steering operations and driveable front wheels 1, 1 and a pair of left and right driveable rear wheels 2, 2, and A self-propelled vehicle provided with a driving unit 10 having an engine 11 provided at the front, a driving unit 20 having a driving cabin 21 provided behind the engine 11, and a rear part of the body frame 3 of the self-propelled vehicle It comprises a link mechanism 4 having a pair of left and right lift arms 4a, 4a connected so as to be swingable up and down, and a power take-out shaft 5 projecting rearward from the rear end of the vehicle body frame 3 to the vehicle body. is there.

In the tractor, a rotor tiller (not shown) is connected to the rear part of the vehicle body via a link mechanism 4, and a power take-out shaft 5 is connected to an input shaft of the rotary tiller via a rotating shaft (not shown). Thus, a riding type tiller is configured.
That is, the link mechanism 4 is moved up and down with respect to the vehicle body frame 3 by moving the pair of left and right lift arms 4a and 4a up and down, so that the rotary plowing device is brought into the lowered working state and the raised non-working state. Move up and down. The power take-out shaft 5 transmits the driving force from the engine 11 to the rotary tiller.

  As shown in FIG. 1, the vehicle body frame 3 of the self-propelled vehicle includes an engine 11, a clutch housing 6 connected to the rear portion of the engine 11, and a transmission case 7 extending from the clutch housing 6 toward the rear of the vehicle body. The transmission case 7 is configured to include a transmission case 8 connected to the extending end of the transmission case 7 and a front wheel support frame 9 extending from the lower part of the engine 11 toward the front of the vehicle body. The front wheel support frame 9 supports a pair of left and right front wheels 1, 1 via a front wheel drive case 9a.

  The driving unit 20 includes a driving cabin 21, a steering wheel 22 disposed on the inner side of the driving cabin 21 behind the engine 11, and an inner side of the driving cabin 21 above the rear end portion of the vehicle body frame 3. And a driving panel 24 provided on the inner side of the driving cabin 21 below the steering wheel 22.

  FIG. 2 is a longitudinal side view showing the prime mover 10. FIG. 3 is a plan view showing the prime mover 10. As shown in FIGS. 2, 3, and 1, the driving unit 10 includes a bonnet 12, an engine cooling radiator 13 and a battery 14 that are disposed inside the bonnet 12 and disposed on the front side of the vehicle body of the engine 11. An engine air cleaner 15 and an exhaust muffler 16 are provided inside the bonnet 12 and disposed above the engine 11.

  As shown in FIGS. 1 and 2, the bonnet 12 includes a pair of left and right side bonnets 12a and 12a, a front grill 12b positioned in front of the pair of left and right side bonnets 12a and 12a, and a pair of left and right side bonnets 12a and 12a. An upper bonnet 12c located on the upper side of the front grill 12b is provided.

  The pair of left and right side bonnets 12a and 12a are detachably attached to a support body 17 provided on the front end side of the front wheel support frame 9 and a center frame 18 disposed on the front side of the operation cabin 21 and fixed to the clutch housing 6. It is connected. The front grill 12b is detachably connected to the front ends of the pair of left and right side bonnets 12a, 12a. The rear end side of the upper bonnet 12c is pivotally supported around the vehicle body lateral axis P by a support 18a provided on the center frame 18, and the upper bonnet 12c opens and closes by swinging around the vehicle body lateral axis P. .

  As shown in FIGS. 2 and 3, a fuel tank 30 for the engine 11 is disposed behind the engine 11 above the clutch housing 6, and is disposed inside the portal-shaped center frame 18 when viewed in the longitudinal direction of the vehicle body. It is provided. The fuel tank 30 includes a tank main body 30a provided with a mounting flange 31, and a fuel supply cylinder 30b extending upward from the upper end of the tank main body 30a on the vehicle body front side. The tank body 30a is formed in a vertically long shape in which the size of the tank body 30a in the vertical direction of the vehicle body is larger than the size of the tank body 30a in the vehicle body longitudinal direction. A mounting flange 31 of the fuel tank 30 is fastened and connected to a support rod 18 c provided on the center frame 18 by a connecting screw, and the fuel tank 30 is supported by the center frame 18. The oil supply cylinder 30 b protrudes outward from a through hole 18 d provided in the center frame 18.

  As shown in FIGS. 2, 3, and 4, the front end side of the upper end side portion 32 located at a higher arrangement height than the arrangement height of the engine 11 in the tank body 30 a in the fuel tank 30 is higher than the upper end side portion 32. A protrusion 34 is provided over the entire width of the upper end portion 32 so as to protrude forward of the vehicle body from the lower end side portion 33 located at a lower arrangement height, and the protrusion when the fuel tank 30 is installed behind the engine 11. 34 and the engine 11 are set in such a positional relationship that the front end side of the projecting portion 34 protrudes above the engine 11 toward the front side of the vehicle body from the rear end 11a of the engine 11.

  As shown in FIGS. 2, 3, and 4, a notch 25 c is provided in the lower portion of the front wall 25 of the operation cabin 21 so as to communicate with the inside of the center frame 18. The rear end side of the tank main body 30a in the fuel tank 30 is inserted into the notch 25c in the front wall 25 of the operation cabin 21, and the vehicle body rearward facing surface 35 at the rear end of the tank main body 30a is connected to the upper end of the tank main body 30a. From the front wall 25 of the driving cabin 21 to the lower end of the vehicle body 21 is set to the vertical direction of the vehicle body along the side 25b on the inner side of the driving cabin of the portion 25a located at the same arrangement height as the tank body 30a. The positional relationship between the vehicle body rearward facing surface 35 and the driving cabin 21 at the rear end of the tank main body 30a when the fuel tank 30 is installed behind the engine 11 is the same as the vehicle rearward facing surface 35 of the tank main body 30a and the driving cabin 21. The vehicle body rear side of the tank body 30a is overlapped with the side surface 25b on the inner side of the driving cabin of the portion 25a of the front wall 25 of the vehicle body in a side view. And position in the vehicle body longitudinal direction of the portion 25a in the front wall 25 of the position and operation cabin 21 in the longitudinal direction of the vehicle body facing surface 35 is set to a position relation of the same.

As shown in FIGS. 1 and 2, the support body 17 protrudes upward from the front wheel support frame 9 so as to support the side bonnet 12 a in a lifted state. As shown in FIGS. 2 and 4, the support portion 18 b provided to support the rear end of the side bonnet 12 a by providing a support pin facing the vehicle body in the longitudinal direction on the center frame 18 lifts the side bonnet 12 a. The support body 17 and the support portion 18b are provided at the arrangement height to be supported in the state, and the gap S is formed between the lower ends of the side bonnet 12a and the center frame 18 and the upper edge of the front wheel support frame 9, Further, the bonnet 12 is supported in a state in which the upper surface of the rear end portion 12d of the upper bonnet 12c is positioned higher than the upper end 34a of the protruding portion 34 of the fuel tank 30 and is flush with the upper surface of the center frame 18. ing.
Accordingly, the side bonnet 12a, the upper bonnet 12c, and the front grill 12b, which are large parts constituting the tractor and are expensive to manufacture, are installed in a model that does not require the clearance S and the bonnet 12 to be lifted, It can be shared with those of the models that provide S and lifting of the bonnet 12.

  As shown in FIGS. 2 and 4, a heat shield plate 40 is provided inside the center frame 18. The heat shield plate 40 prevents the temperature of the fuel tank 30 from rising due to heat dissipation from the engine 11. An iron plate cover 41 that covers the rear of the fuel tank 30 is provided on the front wall 25 of the operation cabin 21. The cover 41 has a cross-sectional shape in a side view and a plan view that follows the shape of the rear end portion of the fuel tank 30, and a gap D is formed between the fuel tank 30 and the vehicle body rearward facing surface 35. In this way, the front wall 25 is formed in a shape that bulges to the rear side of the side surface 25b on the inner side of the operation cabin. The cover 41 includes a lower cover portion 41a positioned on the vehicle body lower side with respect to the tank main body 30a of the fuel tank 30. The lower cover portion 41a allows the interior of the driving cabin 21 to be located between the front wall 25 and the vehicle body frame 3. Is shielded against the side where the engine 11 is located.

  FIG. 5 is a longitudinal side view showing a portion where the power take-out shaft 5 is disposed. FIG. 6 is a rear view showing a portion where the power take-out shaft 5 is disposed. As shown in these drawings, the mission case 8 includes a bearing case 45 attached to the rear surface side of the mission case 8, and supports the power take-out shaft 5 via a bearing 46 attached to the bearing case 45. An oil seal 47, a resin-made grease retaining ring 48, and a resin-made lid 49 are mounted in a shaft hole provided so that the power take-out shaft 5 can be inserted into the bearing case 45. A grease reservoir 50 is formed between the oil seal 47 and the grease retaining ring 48.

  FIG. 7 is a perspective view showing the lid 49. As shown in this figure and FIGS. 5 and 6, the lid body 49 is provided with a detent portion 51 provided at two locations on the outer surface side thereof, and a stopper with one end mounted on one detent portion 51. 52 is used to prevent rotation and come off.

  Each rotation stopper 51 includes a pair of locking pieces 51 a and 51 a that are integrally formed with the lid 49 at a predetermined interval. One end of the stopper 52 is engaged between the pair of locking pieces 51 a and 51 a of the rotation stopper 51, and the other end of the stopper 52 is fixed to the outer surface side of the bearing case 45 by the connecting bolt 53. The stopper 52 abuts against the pair of locking pieces 51a, 51a and stops to prevent the lid 49 from rotating relative to the bearing case 45, and the surface of the lid 49 between the pair of locking pieces 51a, 51a. The lid 49 is prevented from being detached from the bearing case 45 by abutting on the side and acting as a stop.

[Another embodiment]
In the above-described embodiment, the position in the vehicle longitudinal direction of the vehicle body rearward facing surface 35 of the fuel tank 30 is the same as the position in the vehicle longitudinal direction of the side surface 25b on the inner side of the driving cabin of the front wall 25 of the driving cabin. Although an example in which the positional relationship is set is shown, the position in the vehicle body longitudinal direction of the vehicle body rearward facing surface 35 of the fuel tank 30 is slightly smaller than the position in the vehicle body longitudinal direction of the side wall 25b on the inner side of the driving cabin of the front wall 25. You may set so that it may be located in the rear side. Further, the position of the vehicle body rearward facing surface 35 of the fuel tank 30 in the longitudinal direction of the vehicle body is located between the front surface of the front wall 25 on the outer side of the driving cabin and the side surface 25b of the front wall 25 on the inner side of the driving cabin. May be set.

  INDUSTRIAL APPLICABILITY The present invention can be used for a tractor constituting various work vehicles other than a riding type tiller.

9 Front wheel support frame 11 Engine 11a Rear end of engine 12 Bonnet 12d Rear end side portion of bonnet 17 Support body 21 Driving cabin 22 Steering wheel 25 Front wall of driving cabin 25b Front side surface of driving cabin inside 25c Front wall Notch 30 Fuel tank 32 Upper end side portion of fuel tank 33 Lower end side portion of fuel tank 34 Projection portion of fuel tank 34a Upper end of projection portion of fuel tank 35 Fuel tank rearward facing surface

Claims (3)

A tractor including an engine provided at a front portion of a vehicle body, a steering wheel located behind the engine, and a driving cabin;
In a fuel tank for the engine, on a front end side of an upper end side portion located at a higher placement height of the engine than a placement height of the engine, on a lower end side portion located at a lower placement height than the upper end side portion. On the other hand, a protruding part that protrudes toward the front of the vehicle body is provided.
A notch part in which the tank main body of the fuel tank enters the front wall of the driving cabin, and a vehicle body rearward facing surface of the tank main body along a side surface on the driving cabin inward side of the front wall of the driving cabin. Set it to face up and down,
The front end side of the projecting portion is located above the engine in a state of projecting to the front side of the vehicle body from the rear end of the engine, and the position in the vehicle front-rear direction of the vehicle body rearward surface and the front wall of the driving cabin A tractor in which the fuel tank is installed in a state where the position in the vehicle longitudinal direction is the same or substantially the same.   2. The tractor according to claim 1, wherein the vehicle body rearward facing surface of the tank main body and the side surface of the front wall of the driving cabin on the inner side of the driving cabin are overlapped in a side view of the vehicle body.   Provided is a support body standing upright from the front wheel support frame extending from the lower part of the engine toward the front of the vehicle body, and the upper surface of the rear end portion of the bonnet that houses the engine is the projecting portion of the fuel tank 3. The tractor according to claim 1, wherein the bonnet is supported by the support body in a state where the bonnet is positioned higher than an upper end of the hood.

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