Working vehicle

A working vehicle, including: an engine housed inside a bonnet of a front part of a vehicle-body; a purification processing device which performs purification processing of exhaust gas that is discharged from the engine; and an exhaust member which discharges the exhaust gas that is discharged from the purification processing device, to an atmosphere, wherein the exhaust member has: a first exhaust part which protrudes from the bonnet to one side in a vehicle-width direction; a second exhaust part which communicates with an end part of the first exhaust part, and is disposed in an up-and-down direction of the vehicle-body; and a third exhaust part which communicates with an end part of the second exhaust part, and protrudes to the one side in the vehicle-width direction, and a height of an exhaust port of the third exhaust part is lower than a height of a floor of an operator seat.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a working vehicle.

2. Related Art of the Invention

Known is a conventional working vehicle such that a cabin is installed on the driving part, and that a muffler main-body is installed inside the bonnet of the vehicle-body front part (for example, refer to Japanese Patent Application Publication No. Hei 11-078547). For this working vehicle the exhaust gas pipe, which discharges exhaust from the muffler main-body to the vehicle-body outer part, is disposed in a standing manner in the neighborhood of the pole of the cabin.

SUMMARY OF THE INVENTION

Now, a working vehicle whose versatility is higher is desired and, on this point, there is room for further progress.

For example, when a working vehicle of a type without a cabin is utilized for working in a plastic house and the like whose ceiling height is low, the exhaust gas pipe sometimes gets stuck to the ceiling and the like.

The present invention furnishes a working vehicle which can improve versatility.

The 1staspect of the present invention is a working vehicle, comprising:

an engine which is housed inside a bonnet of a front part of a vehicle-body;

a purification processing device which performs purification processing of exhaust gas that is discharged from the engine; and

an exhaust member which discharges the exhaust gas that is discharged from the purification processing device, to an atmosphere, wherein

the exhaust member has: a first exhaust part which protrudes from the bonnet to one side in a vehicle-width direction; a second exhaust part which communicates with an end part of the first exhaust part, and is disposed in an up-and-down direction of the vehicle-body; and a third exhaust part which communicates with an end part of the second exhaust part, and protrudes to the one side in the vehicle-width direction, and

a height of an exhaust port of the third exhaust part is lower than a height of a floor of an operator seat.

The 2ndaspect of the present invention is a working vehicle according to the 1staspect of the present invention, comprising a protection cover which covers the first exhaust part, the second exhaust part and the third exhaust part.

The 3rdaspect of the present invention is a working vehicle according to the 1staspect of the present invention, comprising a bracket which connects the third exhaust part to the vehicle-body.

The 4thaspect of the present invention is a working vehicle according to the 1staspect of the present invention, wherein

the second exhaust part is arranged so as to be along an end part line of the bonnet at a rear side.

A working vehicle of the present invention can improve versatility.

DESCRIPTION OF SYMBOLS

DETAILED DESCRIPTION OF THE INVENTION

In the following, an embodiment related to the present invention is described in detail based on the drawings. Additionally, this invention is not limited by this embodiment. Moreover, as elements in the below-mentioned embodiments, elements which are able to be replaced and easily replaced by a person skilled in the art, and elements which are substantially identical are included.

Embodiment

FIG. 1is a schematic view of the tractor related to the embodiment.FIG. 2is an arrow view of the tractor related to the embodiment (a view such that the vehicle-body front part is viewed from the direction of the arrow A ofFIG. 1).FIG. 3is an arrow view of the tractor related to the embodiment (a view such that the vehicle-body rear part is viewed from the direction of the arrow B ofFIG. 1).FIG. 4is an arrow view of the tractor related to the embodiment (a view such that the vehicle-body upper part is viewed from the direction of the arrow C ofFIG. 1).FIG. 5is a portion perspective view of a neighborhood of the rotation supporting part of the safety frame of the tractor related to the embodiment.FIGS. 6 and 7are perspective views of a neighborhood of the engine of the tractor related to the embodiment.FIG. 8is a view such that the bonnet and exhaust gas pipe of the tractor related to the embodiment is viewed from the front side in the front-and-rear direction.FIG. 9is a portion perspective view such that the bonnet and exhaust gas pipe of the tractor related to the embodiment is viewed downward from the upper right in the vehicle-width direction.FIG. 10is a portion perspective view such that the bonnet and exhaust gas pipe of the tractor related to the embodiment is viewed upward from the lower right in the vehicle-width direction.FIG. 11is a view such that the bonnet and exhaust gas pipe of the tractor related to the embodiment is viewed from the right side in the vehicle-width direction.FIG. 12is a portion side view of the portion inside the encircling line D ofFIG. 11of the tractor related to the embodiment.FIG. 13is a portion perspective view of a neighborhood of the exhaust port of the exhaust gas pipe of the tractor related to the embodiment.FIG. 14is a front view of the loader of the tractor related to the embodiment.FIG. 15is a side view of the loader of the tractor related to the embodiment.FIG. 16is a plan view of the loader of the tractor related to the embodiment.FIG. 17is a portion plan view of a neighborhood of the operator seat of the tractor related to the embodiment.FIG. 18is a portion perspective view of a neighborhood of the protection cover of the tractor related to the embodiment.FIG. 19is a portion plan view of a neighborhood of the extending pipe of the tractor related to the embodiment.FIG. 20is a schematic perspective view of the extending pipe of the tractor related to the embodiment.FIG. 21is a plan view which represents another example of the extending pipe of the tractor related to the embodiment.

Additionally, in the following description, the front-and-rear direction is the front-and-rear direction of the tractor1. More specifically, the front-and-rear direction is the movement direction on the occasion when this tractor1moves straight on, the frontward side in the movement direction is said to be the front side in the front-and-rear direction, and the rearward side the rear side in the front-and-rear direction. The movement direction of the tractor1is the direction from the operator seat8of the tractor1towards the steering handle11at the time when the tractor1moves straight on, the side of the steering handle11becomes the front side, and the side of the operator seat8the rear side. Moreover, the vehicle-width direction is the direction which is orthogonal to the front-and-rear direction in a horizontal face. In the present embodiment, the right side in a state where the front side in the front-and-rear direction is viewed is said to be the right side in the vehicle-width direction, and the left side in a state where the front side in the front-and-rear direction is viewed the left side in the vehicle-width direction. Further, the vertical direction is the direction which is orthogonal to the front-and-rear direction and the vehicle-width direction. These front-and-rear direction, vehicle-width direction and vertical direction are orthogonal to each other.

The tractor1of the present embodiment shown inFIGS. 1-4as a working vehicle is a working vehicle such as an agricultural tractor or the like, which performs working in a farm field or the like, while running on its own by the motive force the motive force source generates. The tractor1comprises: the front wheels2; the rear wheels3; the engine4as a motive force source; and the speed-changing device (the transmission)5. The front wheels2are disposed as wheels which are mainly for steerage, namely, steered wheels. The rear wheels3are disposed as wheels which are mainly for drive, namely, driven wheels. To the rear wheels3, the rotary motive force generated at the engine4, which is housed and loaded inside the bonnet (the hood)6of the vehicle-body front part1F, is able to be transmitted with appropriate reduction in speed at the speed-changing device (the transmission)5, and the rear wheels3generate drive force by this rotary motive force. Moreover, this speed-changing device5is able to transmit the rotary motive force, generated at the engine4, also to the front wheels2as necessary and, in this case, the four wheels of the front wheels2and rear wheels3become driven wheels and generate drive force. Namely, for the speed-changing device5, switching between two-wheel drive and four-wheel drive is able to be carried out, the rotary motive force of the engine4is reduced in speed, and the rotary motive force which has been reduced in speed is able to be transmitted to the front wheels2and the rear wheels3. Moreover, at the vehicle-body rear part1R, the connecting device7is disposed on which an implement such as a rotary cultivator (not shown) or the like is able to be installed. The tractor1of the present embodiment, whose surrounding of the operator seat8on the vehicle-body is opened, is a tractor of a safety frame type which has the safety frame (the ROPS, i.e. the Roll Over Protective Structure)9at the vehicle-body rear part1R. The safety frame9is a structure-body which ensures safety at the time of overturning. From the dashboard10at the front side of the operator seat8the steering handle11is disposed in a standing manner and, around the operator seat8, various manipulation pedals such as the clutch pedal, the brake pedal, the accelerator pedal and the like, and various manipulation levers such as the frontward/rearward movement lever, the speed-changing lever and the like are arranged.

Here, the safety frame9of the tractor1of the present embodiment is, as shown inFIGS. 1 and 5, able to be folded. The safety frame9is able to rotate to the upright position exemplified inFIG. 1, or to the folding-and-compactifying position exemplified inFIG. 5. Specifically, the safety frame9is configured to include: the base end frames9a; the horizontal frame9b; and the rotation supporting parts9c, and is a roughly U-shaped frame such that, in a state of the upright position (refer toFIG. 1), the lower side in the vertical direction is opened as a whole. The base end frames9aare frames which configure the base end parts of the safety frame9. The base end frames9aare fixed to the back face side of the operator seat8, in the vehicle-body rear part1R. The base end frames9aare disposed in a standing manner along the vertical direction in a left-and-right pair with respect to the vehicle-width direction. The horizontal frame9bis disposed so as to be laid on the vertical direction upper end parts of the paired base end frames9a, along the horizontal direction (the vehicle-width direction). For the horizontal frame9b, at the both ends of the horizontal portion the bending parts which are bent roughly towards the lower side in the vertical direction are formed, and each bending part is connected to each vertical direction upper end part of the paired base end frames9avia each rotation supporting part9c. Each rotation supporting part9csupports each bending part of the horizontal frame9brotatably with respect to each base end frame9a. Each rotation supporting part9csupports each bending part of the horizontal frame9b, so that each bending part is able to rotate, with the center being the axis which is disposed along the vehicle-width direction. As shown inFIG. 1, in a state of the upright position, a pin or the like is engaged so as to go through a part of each rotation supporting part9cand each bending part of the horizontal frame9b, thereby the horizontal frame9bcan be held at the upright position, and the safety frame9can be held in a roughly U-shaped state where the lower side in the vertical direction is opened as a whole. On the other hand, the above-mentioned pin or the like is pulled out, as shown inFIG. 5, the horizontal frame9bis allowed to rotate so as to be pushed down from the upright position to the rear side in the front-and-rear direction, and thereby the safety frame9can be allowed to rotate to the folding-and-compactifying position.

Like this, on the occasion when the tractor1which has the safety frame9of a folding type passes, for example, a plastic house inside, its exit-and-entrance and the like, where the ceiling height is low, by folding the safety frame9with the folding-and-compactifying position, working at places where the ceiling height is low is able to be carried out.

And, for the tractor1of the present embodiment, as shown inFIGS. 6-21, in the exhaust system of the tractor1which has the safety frame9of a folding type as mentioned above, the exhaust gas pipe100as an exhaust member is arranged at a predetermined position. By means of this, for example, it is suppressed that the exhaust gas pipe100gets stuck to the ceiling and the like at places where the ceiling height is low as mentioned above, working at places where the ceiling height is low is enabled to be carried out, and versatility is allowed to be improved.

Here, referring toFIGS. 6 and 7, descriptions are given regarding the intake-and-exhaust system of the engine4of the tractor1.

The intake system of the engine4of the tractor1is a system which supplies air to the combustion chambers of the engine4, and is a system where air which is inhaled to the combustion chambers of the engine4flows. The intake system of the engine4is configured to include the air cleaner41, the compressor of the turbocharger42, the intercooler43, the intake manifold44and the like. In the intake system of the engine4, from the upstream side of the intake direction (the direction in which intake air flows), the air cleaner41, the compressor of the turbocharger42, the intercooler43and the intake manifold44are arranged in this order, and are mutually connected by the intake tubes (intake pipes) and the like. Air which is supplied via the intake system of the engine4to the engine4is, for a start, inhaled via the air cleaner41, is supercharged in the compressor of the turbocharger42, is cooled at the intercooler43, and is supplied via the intake manifold44to each combustion chamber.

The exhaust system of the engine4of the tractor1is a system which performs predetermined processing with respect to an exhaust gas such that the gaseous mixture of fuel and air has combusted in the combustion chambers of the engine4, and discharges the exhaust gas to the atmosphere, and is a system where exhaust gas which is discharged from the combustion chambers of the engine4flows. The exhaust system of the engine4is configured to include the exhaust manifold45, the turbine of the turbocharger42, the DOC (Diesel Oxidation Catalyst)/muffler46, the above-mentioned exhaust gas pipe100and the like. In the exhaust system of the engine4, from the upstream side of the exhaust direction (the direction in which exhaust gas flows), the exhaust manifold45, the turbine of the turbocharger42, the DOC/muffler46and the exhaust gas pipe100are arranged in this order, and are mutually connected by the exhaust tubes (exhaust pipes) and the like. Exhaust gas which is discharged via the exhaust system of the engine4from the engine4is introduced from each combustion chamber via the exhaust manifold45into the turbine of the turbocharger42, allows as an operating medium the turbocharger42to operate and, with purification processing (exhaust emission control) being performed at the DOC/muffler46, is discharged via the exhaust gas pipe100to the atmosphere.

And, the exhaust gas pipe100of the present embodiment is, as shown in FIGS.6and8-11, an exhaust pipe, and has: the first exhaust part101; the second exhaust part102; and the third exhaust part103. The exhaust gas pipe100of the present embodiment is disposed at the right side of the bonnet6in the vehicle-width direction. The first exhaust part101is the first protruding part, which protrudes from the bonnet6to one side in the vehicle-width direction or, in the present embodiment, to the right side in the vehicle-width direction. The first exhaust part101goes through the wall face at the rear side of the bonnet6in the front-and-rear direction, and, at the right side in the vehicle-width direction, along the vehicle-width direction, and the end part at the left side in the vehicle-width direction communicates with the above-mentioned DOC/muffler46. Additionally, this first exhaust part101may pass a portion where the bonnet6is cut off. The second exhaust part102communicates with the end part of the first exhaust part101at one side in the vehicle-width direction or, in the present embodiment, with the end part at the right side in the vehicle-width direction. The second exhaust part102is a vertical part which is disposed towards the lower side in the vertical direction. Namely, the second exhaust part102is disposed along the vertical direction, and the end part at the upper side in the vertical direction communicates via the bending part, with the end part of the first exhaust part101at the right side in the vehicle-width direction. The third exhaust part103communicates with the end part of the second exhaust part102at the lower side in the vertical direction. The third exhaust part103is the second protruding part, which protrudes to one side in the vehicle-width direction or, in the present embodiment, to the right side in the vehicle-width direction. Namely, the third exhaust part103is disposed along the vehicle-width direction, and the end part at the left side in the vehicle-width direction communicates via the bending part, with the end part of the second exhaust part102at the lower side in the vertical direction. For this exhaust gas pipe100, exhaust gas from the engine4is led with the first exhaust part101from the bonnet6to the right side in the vehicle-width direction, is guided with the second exhaust part102to the lower side in the vertical direction, and is discharged with the third exhaust part103to the right side in the vehicle-width direction.

For the exhaust gas pipe100of the present embodiment, the first exhaust part101is supported at the side of the DOC/muffler46, and the third exhaust part103is supported via the bracket104and the like at the fuel tank12. Here, the fuel tank12is a tank, which is disposed under the floor13of the operator seat8(refer toFIG. 1) and stores up fuel that is supplied to the engine4. The bracket104, which supports the third exhaust part103at the fuel tank12, is configured to include: the pipe bracket104athat is fixed to the third exhaust part103; and the tank bracket104bthat is fixed to the fuel tank12. The pipe bracket104ais, as shown inFIGS. 8,10and the like, fixed to the portion which is exposed from the below-mentioned protection cover105, in the third exhaust part103(the method of fixing is not limited particularly). The tank bracket104bis fixed to the face of the fuel tank12at the front side in the front-and-rear direction (the method of fixing is not limited particularly). The tank bracket104bis, typically, a rigid part which has a proper vibration characteristic equivalent to that of the engine4or the like. And, the pipe bracket104aand the tank bracket104bare, as shown inFIG. 12, fastened via the fastening member104csuch as a bolt, a nut and the like. By means of this, for the exhaust gas pipe100, the third exhaust part103is fixedly supported via the pipe bracket104a, the tank bracket104band the like at the fuel tank12.

The tractor1of the present embodiment comprises, as shown inFIG. 12, the elastic body104dwhich lies between the pipe bracket104aand the tank bracket104b, in a state where the pipe bracket104aand the tank bracket104bare fastened by the fastening member104c. By means of this, on the occasion when the exhaust gas pipe100and the fuel tank12are relatively displaced during working or the like, a shock which might occur between the pipe bracket104aand the tank bracket104bcan be suppressed.

Moreover, the tractor1comprises, as shown inFIG. 12, the heat insulating material104ewhich lies between the third exhaust part103of the exhaust gas pipe100and the tank bracket104bthat is disposed at the fuel tank12. In the present embodiment, the heat insulating material104eis disposed at the pipe bracket104a. By means of this, since the heat insulating material104ecarries out heat insulation between the third exhaust part103of the exhaust gas pipe100and the tank bracket104b, it can be suppressed that exhaust heat of the exhaust gas pipe100is transmitted to the side of the fuel tank12and, for example, heat deformation of the above-mentioned elastic body104dis suppressed, so that degradation of the exhaust gas pipe100can be suppressed.

In a state where the first exhaust part101is supported at the side of the DOC/muffler46, and the third exhaust part103is supported at the fuel tank (in what follows, said to be a “setup state” in some cases), as exemplified inFIG. 11, the second exhaust part102is parallely disposed so as to be along the end part line6aof the bonnet6at the rear side in the front-and-rear direction. Moreover, in a setup state, as exemplified inFIG. 13, the exhaust port103aof the tip end of the third exhaust part103is positioned at the upper side of the oil-pressure valve14for loaders in the vertical direction.

Here, the oil-pressure valve14for loaders is disposed at the lower side of the floor13of the operator seat8(refer toFIG. 1) with respect to the vertical direction, and, at the front side of the fuel tank12with respect to the front-and-rear direction. The oil-pressure valve14for loaders is, as shown inFIGS. 14-16, a valve to which the oil-pressure lines are joined that supplies, to the loader15, operating oil for allowing the loader15to operate which is disposed so as to be attachable to and detachable from the vehicle-body front part1F. The loader15operates with oil-pressure in accordance with manipulation of the loader control lever16which is disposed, as shown inFIG. 17and the like, in the neighborhood of the operator seat8(in the present embodiment, at the right side of and frontward of the operator seat8). For example, the whole of the loader15goes up if the loader control lever16is pulled to the rear side, and the whole of the loader15goes down if the loader control lever16is pushed to the front side. And, for example, only the bucket of the tip end part of the loader15goes down if the loader control lever16is inclined to the right side, and only the bucket of the tip end part of the loader15goes up if the loader control lever16is inclined to the left side.

And, in more detail, as shown inFIG. 13, in a setup state, the exhaust port103aof the tip end of the third exhaust part103is positioned at the lower side of the floor13with respect to the vertical direction, and, at the upper side of the oil-pressure valve14for loaders. Moreover, the exhaust port103aof the tip end of the third exhaust part103is positioned outside compared to the oil-pressure valve14for loaders with respect to the vehicle-width direction, and, inside compared to the vehicle-width of the whole of the tractor1. By means of this, the oil-pressure valve14for loaders is not subjected to exhaust gas which is discharged from the exhaust port103aof the exhaust gas pipe100, and influence of exhaust heat can be suppressed. Moreover, in the tractor1which comprises the safety frame9of a folding type, the maximum height of the first exhaust part101in the vertical direction is equal to or less than the maximum height of the safety frame9in a state of being folded (refer toFIG. 5) in the vertical direction.

Moreover, the tractor1of the present embodiment comprises, as shown inFIGS. 8-11and18, the protection cover105for protecting the exhaust gas pipe100. The protection cover105of the present embodiment is configured to include the first cover105a, the second cover105b, the third cover105cand the like.

The first cover105ais a cover, which covers and protects the portion of the first exhaust part101that is exposed from the bonnet6, the bending part between the first exhaust part101and the second exhaust part102, and the second exhaust part102. The second cover105bis a cover, which covers and protects the bending part between the second exhaust part102and the third exhaust part103. The third cover105cis a cover, which covers and protects the third exhaust part103.

In more detail, the first cover105ais configured with the upper face105d, the front face105e, the rear face105fand the right side face105g, being integral, and is formed as a cover in a box-like shape, such that the lower face and the left side face are opened. The upper face105dcovers the portion of the first exhaust part101which is exposed from the bonnet6, and the upper side of the bending part between the first exhaust part101and the second exhaust part102in the vertical direction. The front face105ecovers the portion of the first exhaust part101which is exposed from the bonnet6, the bending part between the first exhaust part101and the second exhaust part102, and the front side of the second exhaust part102in the front-and-rear direction. The rear face105fcovers the portion of the first exhaust part101which is exposed from the bonnet6, the bending part between the first exhaust part101and the second exhaust part102, and the rear side of the second exhaust part102in the front-and-rear direction. The right side face105gcovers the bending part between the first exhaust part101and the second exhaust part102, and the right side of the second exhaust part102in the vehicle-width direction. The upper face105dis fixed to the upper part of the first exhaust part101, the front face105eis fixed to the front part of the second exhaust part102, and the rear face105fis fixed to the rear part of the second exhaust part102, and thereby the first cover105ais mounted on the exhaust gas pipe100, so that position-determination and fixation are carried out. Moreover, for the first cover105a, in the front face105eand the right side face105gthe slits105hwhich are for ventilation are plurally formed. On the other hand, in the upper face105dand the rear face105fno slits are formed, and the whole faces are obstructed.

The second cover105bis formed as a cover in a plate-like shape so as to cover the right upper face of the bending part between the second exhaust part102and the third exhaust part103. The second cover105bis formed integrally with the upper face105iof the third cover105c. The third cover105cis configured with the upper face105i, the front face105jand the rear face105k, being integral, and is formed as a cover in a box-like shape (or in a drainpipe-like shape), such that the lower face, the left side face and the right side face are opened. The upper face105icovers the upper side of the third exhaust part103in the vertical direction, and is formed integrally with the second cover105b. The front face105jcovers the front side of the third exhaust part103in the front-and-rear direction. The rear face105kcovers the rear side of the third exhaust part103in the front-and-rear direction. The exhaust port103aof the exhaust gas pipe100is exposed from the right side face of this third cover105c. The upper face105iis fixed to the upper part of the third exhaust part103, and thereby the second cover105band the third cover105care mounted on the exhaust gas pipe100, so that position-determination and fixation are carried out.

Since the protection cover105which is configured as mentioned above can protect by the first cover105a, the second cover105band the third cover105c, each part of the exhaust gas pipe100, damage of the exhaust gas pipe100can be suppressed, and safetiness with respect to exhaust heat can be ensured. In addition, in a state of being protected by the protection cover105, since the lower face of the portion of the first exhaust part101which is exposed from the bonnet6, the left side face of the bending part between the first exhaust part101and the second exhaust part102, the left side face of the first exhaust part101, the front face, rear face and left side face of the bending part between the second exhaust part102and the third exhaust part103, the lower face of the third exhaust part103and the like are exposed, the exhaust gas pipe100is favorably cooled by a traveling wind, a wind sent from the fan which cools the engine4inside the bonnet6and the like. By means of this, since exhaust temperature in the exhaust gas pipe100can be suppressed, safetiness can be improved, and influence on crops and the like can be decreased. Additionally, the above-mentioned exposure loci of the exhaust gas pipe100are, since being protected by the bonnet6, other components and the like, and being positioned in the neighborhood of the steering-and-rotation range of the front wheel2at the right side, basically, arranged at safe positions which are not touched by a worker and the like. Moreover, the above-mentioned pipe bracket104ais fixed to the portion of the lower part of the third exhaust part103, which is exposed from the protection cover105.

Further, the protection cover105which is configured as mentioned above is, since in the front face105eof the first cover105athe plural slits105hare disposed, the exhaust gas pipe100is further favorably cooled by a traveling wind, a wind sent from the fan inside the bonnet6and the like. Moreover, the protection cover105can, since in the right side face105gof the first cover105athe plural slits105hare disposed, promote heat radiation of the exhaust gas pipe100, and the exhaust gas pipe100is further favorably cooled. On the other hand, the protection cover105can, since in the rear face105fof the first cover105aat the side of the operator seat8no slits are disposed and the whole face is obstructed, suppress hot wind due to exhaust heat blowing against a driver and the like.

The tractor1which is configured as mentioned above is a tractor having the safety frame9, which is a structure-body that ensures safety at the time of overturning, and comprises: the engine4which is housed inside the bonnet6of the vehicle-body front part1F; and the exhaust gas pipe100having: the first exhaust part101which is an exhaust part where exhaust gas that is discharged from the engine4flows, and protrudes from the bonnet6to the right side in the vehicle-width direction; the second exhaust part102which communicates with the end part of the first exhaust part101at the right side in the vehicle-width direction and is disposed towards the lower side in the vertical direction; and the third exhaust part103which communicates with the end part of the second exhaust part102at the lower side in the vertical direction and protrudes to the right side in the vehicle-width direction.

Hence, exhaust gas from the engine4can be, by the exhaust gas pipe100, led from the bonnet6to the right side in the vehicle-width direction, guided to the lower side in the vertical direction, and discharged towards the right side in the vehicle-width direction. In addition, for example, in a case where at places where the ceiling height is low, such as a plastic house inside, its exit-and-entrance and the like, the safety frame9is folded with the folding-and-compactifying position and working is carried out, it can be suppressed that the exhaust gas pipe100gets stuck to the ceiling and the like. As a result of this, exhaust gas from the engine4is properly discharged and, since working at places where the ceiling height is low can be enabled to be carried out, versatility can be improved.

In more detail, since the maximum height of the first exhaust part101of the exhaust gas pipe100in the vertical direction is equal to or less than the maximum height of the safety frame9in a state of being folded in the vertical direction, it can be certainly suppressed that the exhaust gas pipe100which is weaker in strength than the safety frame9is caught at the ceiling and the like, and it can be suppressed that the exhaust gas pipe100collapses.

Moreover, the third exhaust part103of the exhaust gas pipe100is supported via the bracket104(the pipe bracket104aand the tank bracket104b) at the fuel tank12. Hence, the exhaust gas pipe100can be stably supported.

Further, the second exhaust part102of the exhaust gas pipe100is parallely disposed so as to be along the end part line6aof the bonnet6at the rear side in the front-and-rear direction. By means of this, since the line of the second exhaust part102of the exhaust gas pipe100at the rear side in the front-and-rear direction becomes roughly the same with the end part line6aof the bonnet6, frontward visibility can be ensured and, for example, the loader15can be installed at the same time.

Additionally, on the exhaust gas pipe100described in the foregoing, as exemplified inFIGS. 19 and 20, the extending pipe106which changes the exhaust direction is also able to be installed. The extending pipe106exemplified inFIGS. 19 and 20is configured with a pipe which is bent at an appropriate angle. In the present embodiment, the extending pipe106is configured with a pipe which is bent roughly in an L-shape. The extending pipe106is, with one end part being joined via the clamp107or the like to the exhaust port103aof the third exhaust part103, communicates with the third exhaust part103. And, the extending pipe106is assembled to the third exhaust part103, so that the opening of the other end part is, for example, towards the rear side in the front-and-rear direction. In this case, for the extending pipe106, the opening of the other end part functions as the exhaust port106a. By means of this, by the extending pipe106, the exhaust direction of exhaust gas can be changed to an arbitrary direction in accordance with the kinds and places of working or the like. In the present embodiment, the extending pipe106can discharge exhaust gas from the engine4, towards the rear side in the front-and-rear direction. Additionally, for the extending pipe106exemplified inFIGS. 19 and 20, the tip end is cut, and the exhaust port106ais formed to slant as a taper face but, for example, as exemplified in FIG.21, the tip end may be straightly formed, so that the exhaust port106ais formed in a shape which has no slants. Moreover, the shape of the extending pipe106is not restricted to a shape with bending roughly in an L-shape, and a shape with bending at a predetermined angle can be arbitrarily selected and used. As a result of this, for example, on the occasion when the tractor1is used at places, where feathers are whirled up if exhaust gas is discharged downward, such as a chicken house and the like, discharging is carried out obliquely rearward by the extending pipe106, and thereby whirling-up of feathers can be suppressed. On the other hand, for example, in a fruit farm and the like discharging is carried out downward by another extending pipe, and thereby damaging of trees can be suppressed.

Additionally, a working vehicle related to an embodiment of the above-mentioned present invention is not limited with the above-mentioned embodiments, and all sorts of changes are able to be carried out.

In the foregoing description, the first exhaust part101and the third exhaust part103, which protrude to the right side in the vehicle-width direction as one side in the vehicle-width direction, may be exhaust parts which protrude to the left side in the vehicle-width direction as one side in the vehicle-width direction. Namely, the exhaust gas pipe100may be disposed at the left side of the bonnet6in the vehicle-width direction.