JP2022060836A - Work vehicle - Google Patents

Abstract

To provide a work vehicle in which a layout of peripheral devices can be easily changed.SOLUTION: A work vehicle includes: a vehicle body frame 8; a travel device 2 capable of traveling on the ground; an engine 11 supported by the vehicle body frame 8; an exhaust muffler 18 connected to the engine 11; and a power transmission device 13 that transmits a drive force of the engine 11 to the travel device 2. The vehicle body frame 8 includes a support part 16 that supports one of the exhaust muffler 18 and a storage part 17 that stores working fluid of the power transmission device 13. The support part 16 has a shape compatible to the exhaust muffler 18 and the storage part 17 so as to be able to support in both cases of the exhaust muffler 18 and the storage part 17.SELECTED DRAWING: Figure 3

Description

The present invention relates to a work vehicle.

For example, a power transmission device (“front wheel” and “rear wheel” in the document) that transmits the driving force of the engine to the work vehicle (“multipurpose vehicle” in the document) disclosed in Patent Document 1 (“front wheel” and “rear wheel” in the document). A belt-type stepless speed changer ") is provided. Further, in this work vehicle, an exhaust muffler is connected to the engine, and the exhaust muffler is arranged so as to extend in the front-rear direction of the vehicle body (see FIG. 2 of Patent Document 1). The power transmission device and the exhaust muffler are supported by the vehicle body frame.

Japanese Unexamined Patent Publication No. 2017-1556998

By the way, in the work vehicle of Patent Document 1, a belt type continuously variable transmission is used as a power transmission device, but when a hydrostatic continuously variable transmission is used as a power transmission device, a hydrostatic continuously variable transmission is used. A storage unit is required to store the hydraulic oil of the device. Therefore, the layout of the peripheral devices of the engine and the power transmission device differs greatly depending on whether the power transmission device is a belt-type stepless transmission device or the power transmission device is a hydrostatic stepless transmission device. Even if the layout of the peripheral device is different, it is desirable that the peripheral device can be arranged as easily as possible.

The present invention is to provide a work vehicle in which the layout of peripheral devices can be easily changed.

The work vehicle of the present invention transmits the vehicle body frame, a traveling device capable of traveling to the ground, an engine supported by the vehicle body frame, an exhaust muffler connected to the engine, and the driving force of the engine to the traveling device. The vehicle body frame is provided with a support portion for supporting either the exhaust muffler or the storage portion for storing the hydraulic oil of the power transmission device. Is characterized by having a compatible shape with respect to the exhaust muffler and the storage portion so that any of the exhaust muffler and the storage portion can be supported.

According to the present invention, the support portion of the vehicle body frame has a shape compatible with the exhaust muffler and the storage portion. Therefore, when the power transmission device requires hydraulic oil, the storage portion is supported by the support portion, and when the power transmission device does not require hydraulic oil, the exhaust muffler is supported by the support portion. This makes it easy to change the layout of peripheral devices such as engines and power transmission devices. As a result, a work vehicle in which the layout of peripheral devices can be easily changed is realized.

In the present invention, when the exhaust muffler and the storage portion are supported by the support portion, the exhaust muffler and the storage portion are supported by the support portion in a state where the central region in the longitudinal direction is located in the central region in the vehicle body lateral direction of the vehicle body frame. It is preferable to be done.

In this configuration, the exhaust muffler or the storage portion is supported by the support portion, and the central region in the longitudinal direction of the exhaust muffler or the storage portion is located in the central region in the lateral direction of the vehicle body of the vehicle body frame. Be supported. Therefore, for example, even if the working oil is stored in the storage portion and the weight of the storage portion becomes heavy, if the storage portion is supported by the support portion, the weight balance between the left and right sides of the vehicle body becomes stable. ..

In the present invention, the support portion is located at the rear end portion of the vehicle body frame, and when the exhaust muffler and the storage portion are supported by the support portion, the exhaust muffler and the storage portion are respectively. It is preferable that the vehicle is supported by the support portion in a state where the longitudinal direction of the vehicle is along the lateral direction of the vehicle body.

With this configuration, it is easy for the operator to work from the rear part of the vehicle body on the exhaust muffler or the storage part supported by the support part. Further, in a state where the exhaust muffler or the storage portion is supported by the support portion, the longitudinal direction of the exhaust muffler or the storage portion is along the lateral direction of the vehicle body. Therefore, the exhaust muffler or the storage portion is less likely to protrude to the rear side than the rear end portion of the vehicle body frame while being supported by the support portion, as compared with the configuration in which the longitudinal direction is along the front-rear direction of the vehicle body.

In the present invention, the exhaust muffler is supported by the support portion, an exhaust gas purifying device is provided in an exhaust path between the engine and the exhaust muffler, and the exhaust gas purifying device is more than the exhaust muffler. It is preferable that it is arranged on the side where the engine is located.

Generally, the temperature of the exhaust gas purification device is high, so it is necessary to take measures against heat around the exhaust gas purification device. In this configuration, the exhaust muffler and the exhaust gas purification device are configured as separate bodies, and the exhaust gas purification device is located on the side where the engine is located with respect to the exhaust muffler, so that the temperature rise of the exhaust muffler is suppressed. Easy to do.

In the present invention, the storage portion is supported by the support portion, and the exhaust muffler is arranged on the lateral side of the vehicle body of the engine and on the side where the engine is located with respect to the storage portion in a plan view. Suitable. Further, in the present invention, it is preferable that the exhaust path behind the exhaust muffler is provided with an exhaust port for exhausting the exhaust gas from the engine, and the exhaust port is located in the upper region of the storage portion. ..

With this configuration, an efficient layout of the storage unit and the exhaust muffler is realized, and the layout of the equipment around the engine and power transmission device is made compact as a whole.

It is a left side view which shows the whole of a multipurpose vehicle. It is a main part plan view which shows the engine of a multipurpose vehicle, a transmission, a storage tank, and an exhaust muffler. It is a rear view which shows the rear part of a multipurpose vehicle. It is a schematic diagram which shows the hydraulic circuit of hydraulic oil and the circulation circuit of a coolant. It is sectional drawing of the supply pipe. It is a main part plan view which shows the engine of a multipurpose vehicle, a transmission, an exhaust muffler, and an exhaust gas purification device when a storage tank is not provided. It is a rear view which shows the rear part of a multipurpose vehicle when a storage tank is not provided.

Hereinafter, embodiments that are an example of the present invention will be described with reference to the drawings. In the following description, regarding the traveling vehicle body of the multipurpose vehicle, the direction of the arrow F shown in FIGS. 1 and 2 is the "front of the vehicle body", the direction of the arrow B is the "rear of the vehicle body", and the direction of the arrow U shown in FIG. Is "upward of the vehicle body", the direction of the arrow D is "lower of the vehicle body", the direction of L shown in FIG. 2 is "left of the vehicle body", and the direction of R is "right of the vehicle body".

[Overall configuration of multipurpose vehicle]
As shown in FIG. 1, the multipurpose vehicle has a traveling vehicle body 3. The traveling vehicle body 3 is equipped with a pair of left and right front wheels 1 so as to be steerable and driveable, and a pair of left and right rear wheels 2 so as to be driveable. The pair of left and right front wheels 1 and the pair of left and right rear wheels 2 are the "traveling devices" of the present invention. A driving unit 4 is formed in an intermediate portion of the traveling vehicle body 3 in the front-rear direction. The driver unit 4 is provided with a steering wheel 6 for steering and operating the driver's seat 5 and the front wheels 1. A loading platform 7 is provided at the rear of the traveling vehicle body 3, and the loading platform 7 is supported by the vehicle body frame 8. The vehicle body frames 8 are provided on the vehicle body in pairs on the left and right, and extend in the front-rear direction of the vehicle body.

As shown in FIGS. 1 and 2, an engine 11, a traveling mission 12, and a continuously variable transmission 13 are provided below the loading platform 7. The engine 11 is provided in the front portion of the lower region of the loading platform 7. In the present embodiment, the engine 11 is a diesel engine, but may be a gasoline engine. Further, an exhaust muffler 18 for the engine 11 is provided. The traveling mission 12 is provided on the rear side of the vehicle body with respect to the engine 11. The continuously variable transmission 13 is provided on the left lateral side of the vehicle body with respect to the engine 11 and the traveling mission 12. In the present embodiment, the continuously variable transmission 13 is a hydrostatic continuously variable transmission (HST), and the driving force of the engine 11 is applied by hydraulic oil to a pair of left and right front wheels 1 and a pair of left and right rear wheels 2. And to convey to. Further, the continuously variable transmission 13 is the "power transmission device" of the present invention.

Rear wheel output units 12b are provided on both lateral sides of the rear end of the traveling mission 12, and the driving force of the engine 11 is output from the rear wheel output units 12b toward the rear wheels 2. Further, a front wheel output shaft (not shown) is provided on the lateral side of the lower portion of the traveling mission 12, and the driving force of the engine 11 is output from the front wheel output shaft toward the front wheel 1. That is, the driving force of the engine 11 is output to the front wheels 1 and the rear wheels 2 via the speed change by the traveling mission 12 and the continuously variable transmission 13.

A bonnet 14 that can be opened and closed is provided in the front portion of the traveling vehicle body 3, and a cooling device 15 or the like for cooling the engine 11 is arranged in the space formed in the bonnet 14. The cooling device 15 is a so-called radiator.

A vertical frame 8B extending vertically is formed at the rear end of the vehicle body frame 8, and the vertical frames 8B are provided in pairs on the left and right. A support bracket portion 16 is provided between the pair of left and right vertical frames 8B, and the storage tank 17 is supported by the support bracket portion 16. The support bracket portion 16 is the "support portion" of the present invention. The support bracket portion 16 is horizontally laid over a pair of left and right vertical frames 8B. A pair of left and right support members 16b are formed on the support bracket portion 16, and the pair of left and right support members 16b extend back and forth. The storage tank 17 is supported by the support member 16b of the support bracket portion 16 in a state where the longitudinal direction is along the lateral direction of the vehicle body and the central region in the longitudinal direction is located in the central region in the lateral direction of the vehicle body of the vehicle body frame 8. .. The storage tank 17 is the "storage unit" of the present invention.

As shown in FIG. 2, the exhaust muffler 18 is provided between the pair of left and right vehicle body frames 8 at a position rearward from the engine 11 and at a position closer to the vehicle body frame 8 on the left side of the vehicle body. .. The front-rear direction of the exhaust muffler 18 and the front-rear direction of the traveling vehicle body 3 match. The exhaust muffler 18 is arranged on the side of the vehicle body of the engine 11 in a plan view and on the side where the engine 11 is located with respect to the storage tank 17. The intake portion provided in the front portion of the exhaust muffler 18 and the exhaust portion provided in the front side portion in the upper part of the engine 11 are communicated with each other by a connecting pipe 19. Further, an exhaust port 20 is provided in the exhaust path on the rear side of the exhaust muffler 18, and the exhaust port 20 discharges the exhaust gas from the engine 11 to the outside. The discharge port 20 is located in the upper region of the storage tank 17.

[About the hydraulic oil cooling mechanism]
As shown in FIG. 4, the storage tank 17 is formed in a two-layer system so as to have two internal spaces. The two internal spaces in the storage tank 17 are separated by a partition wall 17W. As the two internal spaces, a hydraulic oil storage space 17A and a coolant storage space 17B are formed inside the storage tank 17. The hydraulic oil storage space 17A stores the hydraulic oil of the continuously variable transmission 13. Further, the coolant storage space 17B stores the cooling liquid for cooling the engine 11.

The hydraulic oil storage space 17A and the coolant storage space 17B are adjacent to each other with the partition wall 17W interposed between the hydraulic oil storage space 17A and the coolant storage space 17B. Further, the partition wall 17W is made of a stainless steel material. Therefore, heat exchange is promoted between the hydraulic oil stored in the hydraulic oil storage space 17A and the coolant stored in the coolant storage space 17B. The partition wall 17W is preferably made of a material having high thermal conductivity.

FIG. 4 shows a circuit diagram of the flow path of the hydraulic oil of the continuously variable transmission 13 and the flow path of the cooling liquid for cooling the engine 11. The hydraulic oil is supplied to the circulating oil passage of the continuously variable transmission 13. The storage tank 17 and the continuously variable transmission 13 are connected by a supply oil passage 21 and a reducing oil passage 22. A first pump P1 is provided in the middle of the supply oil passage 21, and the first pump P1 pumps hydraulic oil from the storage tank 17 to the continuously variable transmission 13. The first pump P1 is driven by, for example, an engine 11 or a motor. The hydraulic oil used for the operation of the continuously variable transmission 13 (including the hydraulic oil leaking from the circulating oil passage of the continuously variable transmission 13) is returned to the storage tank 17 via the reducing oil passage 22.

The storage tank 17 and the engine 11 are connected by a supply liquid passage 23 and a reduction liquid passage 24. A second pump P2 is provided in the middle of the supply liquid passage 23, and the second pump P2 pumps the cooling liquid from the storage tank 17 to the engine 11. The second pump P2 is a so-called water pump, and is driven by, for example, an engine 11 or a motor. The cooling liquid used for cooling the engine 11 is returned to the storage tank 17 via the reducing liquid passage 24. A cooling device 15 is provided in the middle of the reduction liquid passage 24, and the cooling liquid heated by the cooling of the engine 11 is cooled by the cooling device 15.

A part of each of the supply oil passage 21 and the supply liquid passage 23 extending from the storage tank 17 to the position side of the engine 11 and the continuously variable transmission 13 is incorporated in the supply pipe 25. The supply pipe 25 has two pipe lines inside, and the two pipe lines are separated by a partition wall 25W. The supply oil passage 21 and the supply liquid passage 23 are adjacent to each other with the partition wall 25W interposed between the supply oil passage 21 and the supply liquid passage 23. Therefore, heat exchange is promoted between the hydraulic oil flowing through the supply oil passage 21 and the cooling liquid flowing through the supply liquid passage 23. The partition wall 25W is made of a stainless steel material. The partition wall 25W is preferably made of a material having high thermal conductivity.

In the continuously variable transmission 13 which is a hydrostatic continuously variable transmission (HST), hydraulic oil is generally used for the operation of the continuously variable transmission 13 at an appropriate viscosity in order to improve the shifting performance. The viscosity of the hydraulic oil changes with temperature. Therefore, when the hydraulic oil is used for the operation of the continuously variable transmission 13, it is desirable that the temperature of the hydraulic oil is within a certain range.

In the cold start state, the temperature of the hydraulic oil is lower than the optimum temperature, and the viscosity of the hydraulic oil is high. Therefore, in general, the continuously variable transmission 13 is warmed up with the actual vehicle running, and the temperature of the hydraulic oil is raised while the continuously variable transmission 13 operates with a low load in the actual vehicle running. Rise. However, in a cold region or a low temperature environment, it takes time for the temperature of the hydraulic oil to rise, and the warm-up operation of the continuously variable transmission 13 tends to be long. Therefore, it is desirable that the temperature of the hydraulic oil rises to an appropriate temperature as soon as possible from the cold start state.

When the engine 11 is started from the cold start state, the coolant is used to cool the engine 11 while constantly circulating between the supply liquid passage 23 and the reduction liquid passage 24, so that the temperature of the coolant is prior to the temperature of the hydraulic oil. Rise. At this time, the temperature of the coolant returned from the reducing liquid passage 24 to the coolant storage space 17B is higher than the temperature of the hydraulic oil, and heat is generated from this coolant to the hydraulic oil in the hydraulic oil storage space 17A. Conduct. That is, heat exchange is performed between the coolant and the hydraulic oil via the partition wall 17W, and the temperature rise of the hydraulic oil is promoted. Further, when the coolant circulating between the supply liquid passage 23 and the reduction liquid passage 24 flows through the supply liquid passage 23, the coolant flows through the supply liquid passage 23 inside the supply pipe 25. Therefore, heat exchange is performed between the hydraulic oil in the supply oil passage 21 and the cooling liquid in the supply liquid passage 23 via the partition wall 25W, and the temperature rise of the hydraulic oil is promoted. As a result, the temperature of the hydraulic oil rises faster from the cold start state as compared with the configuration in which heat exchange is not performed between the coolant and the hydraulic oil.

In a high temperature environment, or when the continuously variable transmission 13 operates under a high load, the temperature of the hydraulic oil tends to rise higher than the optimum temperature. On the other hand, even if the temperature of the coolant is lower than the optimum temperature of the hydraulic oil, no particular problem occurs. Therefore, in the present embodiment, the coolant is also used for cooling the hydraulic oil in a state other than the cold start.

In the present embodiment, the cooling device 15 cools the coolant so that the temperature of the coolant is equal to the optimum temperature of the hydraulic oil or slightly lower than the optimum temperature of the hydraulic oil. When the temperature of the hydraulic oil becomes higher than the temperature of the coolant, heat is conducted from the hydraulic oil in the hydraulic oil storage space 17A to the coolant in the coolant storage space 17B. That is, when the temperature of the hydraulic oil becomes higher than the temperature of the coolant, heat is exchanged between the coolant in the coolant storage space 17B and the hydraulic oil in the hydraulic oil storage space 17A via the partition wall 17W, and the hydraulic oil is exchanged. Cooling is promoted. Further, when the hydraulic oil flows through the supply oil passage 21 inside the supply pipe 25 and the coolant flows through the supply liquid passage 23 inside the supply pipe 25, the hydraulic oil and the supply liquid passage 23 of the supply oil passage 21 Heat exchange with the coolant is performed via the partition wall 25W, and cooling of the hydraulic oil is promoted.

Since the coolant receives heat from the hydraulic oil before it passes through the inside of the engine 11, the coolant tends to have a high temperature as compared with a configuration in which heat exchange between the hydraulic oil and the coolant is not performed. .. Therefore, it is necessary to set the cooling capacity of the cooling device 15 to be larger than that in the configuration in which heat exchange between the hydraulic oil and the cooling liquid is not performed. That is, the cooling device 15 indirectly cools the hydraulic oil by cooling the coolant that has received heat from the hydraulic oil. Nevertheless, in this embodiment, it is not necessary to provide a dedicated oil cooler for the hydraulic oil, and compared to a configuration in which a dedicated oil cooler is provided in the hydraulic circuit of the hydraulic oil, the entire cooling of the coolant and the hydraulic oil is combined. The configuration is simplified and space is saved.

Further, in a configuration in which a dedicated oil cooler for hydraulic oil is provided, flow path resistance is generated when the hydraulic oil flows through the oil cooler, and this flow path resistance acts as back pressure on the continuously variable transmission 13. This can be a factor that lowers the operating efficiency of the continuously variable transmission 13. In other words, if the oil cooler is provided in the hydraulic circuit of the hydraulic oil, the operating efficiency of the continuously variable transmission 13 is lowered by the amount of the pressure loss when the hydraulic oil flows through the oil cooler. In the present embodiment, there is no dedicated oil cooler in the hydraulic circuit of the hydraulic oil, and the hydraulic oil is cooled by the coolant. Therefore, the temperature of the hydraulic oil used for the operation of the continuously variable transmission 13 is easily maintained at an appropriate temperature without a dedicated oil cooler, and the operating efficiency (shift performance) of the continuously variable transmission 13 is enhanced.

The partition wall 17W is provided in the storage tank 17 in a state of being inclined with respect to the vertical direction and the horizontal direction. Therefore, since the area of the partition wall 17W is larger than that of the partition wall 17W extending in the vertical direction, heat exchange between the coolant in the coolant storage space 17B and the hydraulic oil in the hydraulic oil storage space 17A is further promoted. To. Further, the coolant and the hydraulic oil each convection inside the storage tank 17. Therefore, it is conceivable that the temperature of the coolant differs between the upper region and the lower region of the coolant storage space 17B, and the temperature of the hydraulic oil differs between the upper region and the lower region of the hydraulic oil storage space 17A. Even in such a case, since the partition wall 17W is inclined with respect to the horizontal direction, heat exchange between the coolant in the coolant storage space 17B and the hydraulic oil in the hydraulic oil storage space 17A extends above and below the storage tank 17. It is promoted evenly. As a result, the temperature rise of the hydraulic oil is further promoted in the cold start state, and the cooling of the hydraulic oil is further promoted in the state other than the cold start.

A guide plate 26 is provided on the lateral outer portion of the traveling vehicle body 3, and the airflow from the front on the lateral outer side of the traveling vehicle body 3, that is, the traveling wind is guided to the lateral inner side of the vehicle body by the guide plate 26. That is, the lateral outer portion of the vehicle body is provided with a guide plate 26 capable of guiding the airflow from the front to the lateral inner side of the vehicle body. The guide plate 26 is arranged on the front side of the vehicle body and on the lateral side of the vehicle body with respect to the storage tank 17. The storage tank 17 receives the traveling wind guided to the laterally inner side of the vehicle body by the guide plate 26, and the storage tank 17 is cooled by the traveling wind.

[About the configuration of the support bracket]
As described above, the support bracket portion 16 is formed at the rear end portion of the vehicle body frame 8, and in the above-described embodiment, the support bracket portion 16 supports the storage tank 17. As shown in FIGS. 5 and 6, the support bracket portion 16 is configured to be able to support the exhaust muffler 18 instead of the storage tank 17. In the example shown in FIGS. 5 and 6, a belt-type continuously variable transmission 30 is provided in the traveling vehicle body 3 in place of the continuously variable transmission 13. Lubricating oil is used for the belt-type continuously variable transmission 30, and the lubricating oil is stored inside the casing of the belt-type continuously variable transmission 30. Therefore, in the configuration in which the belt-type continuously variable transmission 30 is adopted for transmitting the driving force of the engine 11, the storage tank 17 having the hydraulic oil storage space 17A for storing the hydraulic oil is not required. In this case, the exhaust muffler 18 is supported by the support bracket portion 16, and the longitudinal direction of the exhaust muffler 18 is along the lateral direction of the machine body. Further, the exhaust muffler 18 is supported by the support bracket portion 16 in a state where the central region in the longitudinal direction is located in the central region in the lateral direction of the vehicle body of the vehicle body frame 8.

In this way, the support bracket portion 16 supports either the exhaust muffler 18 or the storage tank 17. The support bracket portion 16 has a shape compatible with the exhaust muffler 18 and the storage tank 17 so that any of the exhaust muffler 18 and the storage tank 17 can be supported. Further, when the exhaust muffler 18 and the storage tank 17 are supported by the support bracket portion 16, the exhaust muffler 18 and the storage tank 17 are supported by the support bracket portion 16 in a state where the central region in the longitudinal direction is located in the central region in the vehicle body lateral direction of the vehicle body frame 8. Will be done. The weight of the storage tank 17 tends to be heavy, but in the configuration of the present embodiment, the weight of the traveling vehicle body 3 in the vehicle body left-right direction regardless of whether the storage tank 17 is required or not. The balance tends to be even. In addition, when the exhaust muffler 18 and the storage tank 17 are supported by the support bracket portion 16, they are supported by the support bracket portion 16 in a state in which the longitudinal direction is along the lateral direction of the vehicle body. As a result, the exhaust muffler 18 or the storage tank 17 in a state of being supported by the support bracket portion 16 is less likely to protrude to the rear side than the rear end portion of the vehicle body frame 8.

As shown in FIG. 5, an exhaust gas purifying device 31 which is an exhaust gas purifying device is provided on the left side of the vehicle body of the engine 11. The exhaust gas purifying device 31 is provided in the exhaust path between the engine 11 and the exhaust muffler 18, and is, for example, a three-way catalyst or a diesel particulate filter (DPF). The exhaust gas purifying device 31 and the exhaust muffler 18 are configured as separate bodies, and the exhaust gas purifying device 31 is arranged on the side where the engine 11 is located with respect to the exhaust gas purifying device 18. By configuring the exhaust gas purifying device 31 and the exhaust muffler 18 as separate bodies, the overall size of the combination of the exhaust gas purifying device 31 and the exhaust muffler 18 becomes compact.

The exhaust muffler 18 is supported by the support bracket portion 16 at the rear end portion of the vehicle body frame 8, and the support bracket portion 16 is located at the rear end portion of the vehicle body frame 8. With this configuration, a wider space on the left side of the engine 11 is secured as compared with a configuration in which the exhaust muffler 18 is arranged on the left side of the engine 11, and the exhaust gas purifying device 31 is easily arranged in this space. Further, although the temperature of the exhaust gas purifying device 31 is generally high, the heat measures around the exhaust gas purifying device 31 are simplified by the configuration in which the arrangement space of the exhaust gas purifying device 31 is widely secured in this way. Is possible.

[Another Embodiment]
The present invention is not limited to the configuration exemplified in the above-described embodiment, and the following will exemplify another typical embodiment of the present invention.

(1) In the above-described embodiment, the front wheel 1 and the rear wheel 2 are shown as the traveling device, but the traveling device may be, for example, a crawler type.

(2) In the above-described embodiment, the support bracket portion 16 as a support portion is provided at the rear end portion of the vehicle body frame 8, but the support bracket portion 16 is provided at the front portion or the front / rear center portion of the vehicle body frame 8. May be done.

(3) In the above-described embodiment, when the storage tank 17 is supported by the support bracket portion 16, the discharge port 20 is located in the upper region of the storage tank 17, but the discharge port 20 is below the storage tank 17. It may be located in the area. Further, the discharge port 20 may be located in a right region or a left region of the storage tank 17.

(4) In the above-described embodiment, a multipurpose vehicle is shown as a work vehicle, but the work vehicle may be a passenger-type lawn mower, an agricultural machine such as a tractor, or a wheel loader or the like. It may be a construction machine, a snowplow, a snowplow, or the like.

The configuration disclosed in the above embodiment (including another embodiment, the same shall apply hereinafter) can be applied in combination with the configuration disclosed in other embodiments as long as there is no contradiction. Moreover, the embodiment disclosed in the present specification is an example, and the embodiment of the present invention is not limited to this, and can be appropriately modified without departing from the object of the present invention.

The present invention is applicable to work vehicles.

1: Front wheel (traveling device)
2: Rear wheel (traveling device)
8: Body frame 11: Engine 13: Continuously variable transmission (power transmission device)
16: Support bracket part (support part)
17: Storage tank (reservoir)
18: Exhaust muffler 19: Connection pipe (exhaust path between the engine and the exhaust muffler)
20: Exhaust gas outlet 31: Exhaust gas purification device

Claims (6)

Body frame and
A traveling device that can travel to the ground and
The engine supported by the body frame and
The exhaust muffler connected to the engine and
A power transmission device for transmitting the driving force of the engine to the traveling device is provided.
The vehicle body frame is provided with a support portion for supporting either the exhaust muffler or the storage portion for storing the hydraulic oil of the power transmission device.
The support portion is a work vehicle having a shape compatible with the exhaust muffler and the storage portion so that any of the exhaust muffler and the storage portion can be supported. A claim that the exhaust muffler and the storage portion are supported by the support portion in a state where the central region in the longitudinal direction is located in the central region in the lateral direction of the vehicle body of the vehicle body frame when the exhaust muffler and the storage portion are supported by the support portion. The work vehicle according to 1. The support portion is located at the rear end portion of the vehicle body frame.
The work vehicle according to claim 1 or 2, wherein the exhaust muffler and the storage portion are supported by the support portion in a state where the longitudinal direction is along the lateral direction of the vehicle body when the storage portion is supported by the support portion. The exhaust muffler is supported by the support portion, and the exhaust muffler is supported by the support portion.
An exhaust gas purification device is provided in the exhaust path between the engine and the exhaust muffler.
The work vehicle according to any one of claims 1 to 3, wherein the exhaust gas purifying device is arranged on the side where the engine is located with respect to the exhaust muffler. The storage portion is supported by the support portion, and the storage portion is supported by the support portion.
The work vehicle according to any one of claims 1 to 3, wherein the exhaust muffler is arranged on the lateral side of the vehicle body of the engine and on the side where the engine is located with respect to the storage portion in a plan view. The exhaust path behind the exhaust muffler is provided with an exhaust port for exhausting the exhaust gas from the engine.
The work vehicle according to claim 5, wherein the discharge port is located in an upper region of the storage unit.

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