Multipurpose vehicle

Abstract

To provide a multipurpose vehicle in which cooling air discharged from a belt type infinite variable-speed drive device efficiently cools cooling objects that need cooling in addition to an engine and an exhaust part.SOLUTION: A multipurpose vehicle comprises: an engine E which is arranged in a body; an exhaust part 8 which discharges exhaust gas of the engine E; a belt type infinite variable-speed drive device 31 to which drive force from the engine E is transmitted; and an exhaust port 40 which discharges cooling air inhaled to cool inside of the belt type infinite variable-speed drive device 31 from the inner side of the belt type infinite variable-speed drive device 31 to the outer side. The exhaust port 40 is arranged at one side of the exhaust part 8. The multipurpose vehicle also comprises an air introducing part 41 which is arranged at the other side of the exhaust part 8 for introducing the cooling air discharged from the exhaust port 40 into cooling objects.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a multipurpose vehicle equipped with an engine mounted on a vehicle body and a belt-type continuously variable transmission to which driving force from the engine is transmitted. [Background technology]

[0002] For example, as described in Patent Document 1, a conventional multi-purpose vehicle has a belt-type continuously variable transmission having an exhaust port that discharges cooling air from the inside of the case to the outside, and the engine is cooled by the cooling air discharged from the exhaust port. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-046081 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in conventional multi-purpose vehicles, the cooling air discharged from the exhaust port is simply directed toward the engine, meaning that conventional multi-purpose vehicles are not configured to efficiently cool devices that require cooling, such as a water temperature sensor that measures the temperature of the engine's coolant, with the cooling air.

[0005] Therefore, the object of the present invention is to provide a multipurpose vehicle that not only uses the cooling air discharged from a belt-type continuously variable transmission to cool the engine and exhaust section, but also uses the cooling air to efficiently cool objects that require cooling. [Means for solving the problem]

[0006] The multipurpose vehicle of the present invention comprises an engine mounted on a vehicle body, an exhaust section for discharging exhaust gas from the engine, a belt-type continuously variable transmission to which driving force from the engine is transmitted, and an exhaust port for discharging cooling air taken in to cool the inside of the belt-type continuously variable transmission from the inside to the outside of the belt-type continuously variable transmission, the exhaust port being disposed on one side of the exhaust section, and an air guide section being disposed on the other side of the exhaust section for guiding the cooling air discharged from the exhaust port to an object to be cooled. The airflow guide section includes a first airflow guide plate and a second airflow guide plate, which are arranged in the longitudinal direction of the airframe and are each formed of a plate-like member extending along the longitudinal direction of the airframe. .

[0007] According to this invention, the cooling air is guided to the object to be cooled by the air guide section, making it possible to efficiently cool the object to be cooled. In other words, the cooling air discharged from the belt-type continuously variable transmission can not only cool the exhaust section, which becomes hot as exhaust gas from the engine passes through it, but also efficiently cool other objects to be cooled.

[0008] The multipurpose vehicle of the present invention comprises an engine mounted on a vehicle body, an exhaust section for discharging exhaust gas from the engine, a belt-type continuously variable transmission to which driving force from the engine is transmitted, and an exhaust port for discharging cooling air taken in to cool the inside of the belt-type continuously variable transmission from the inside to the outside of the belt-type continuously variable transmission, the exhaust port being disposed on one side of the exhaust section, and an air guide section being disposed on the other side of the exhaust section for guiding the cooling air discharged from the exhaust port to an object to be cooled, The airframe is provided with a loading platform that can swing up and down, the exhaust port is disposed below the loading platform, and the air guide unit has a first air guide plate supported on the airframe and a second air guide plate supported on the loading platform. do.

[0009] According to this configuration, the air guide section has a first air guide plate and a second air guide plate. Compared to when the air guide section is configured from a single plate-shaped member, the first air guide plate and the second air guide plate are configured from small members, making them less susceptible to damage or deformation. Furthermore, because the first air guide plate and the second air guide plate are supported by the vehicle body and the loading platform, respectively, they can be supported in locations close to their installation locations, making it possible to configure compact mounting members for attaching the first air guide plate and the second air guide plate.

[0010] In the present invention, it is preferable that the second air guide plate is arranged behind the first air guide plate, aligned with the first air guide plate in the fore-and-aft direction of the airframe, and that the rear portion of the second air guide plate is provided with an inclined portion that slopes toward the exhaust port as it becomes more rearward of the airframe.

[0011] According to this configuration, the first and second air guide plates can receive the cooling air discharged from the exhaust port, just as if a single large air guide plate were provided, making it possible to guide more cooling air to the object to be cooled. Furthermore, while the vehicle is running, air flows from the front to the rear, and the air flowing rearward flows toward the exhaust port due to the inclined portion. The air flowing toward the exhaust port can further cool the exhaust section.

[0012] In the present invention, it is preferable that the first air guide plate is made of a metal plate, and the second air guide plate is made of a flexible member.

[0013] According to this configuration, the first air guide plate supported on the vehicle body is made of a sturdy metal plate. Also, even if the first air guide plate collides with the second air guide plate when the loading platform swings, the second air guide plate is made of a flexible material and is therefore less likely to deform or break, and it is possible to prevent deformation or breakage of the first air guide plate upon collision.

[0014] In the present invention, it is preferable that the engine is provided with a water temperature sensor that measures the temperature of the engine's cooling water on the side of the engine where the exhaust part is located, and the object to be cooled is the water temperature sensor.

[0015] This configuration makes it possible to effectively cool the water temperature sensor located on the side of the exhaust section, which becomes hot.

[0016] In the present invention, it is preferable that the exhaust section is provided with an oxygen concentration sensor that measures the oxygen concentration in the exhaust of the engine, and the object to be cooled is the oxygen concentration sensor.

[0017] According to this configuration, it is possible to effectively cool the oxygen concentration sensor provided in the exhaust section, which becomes hot. [Brief explanation of the drawings]

[0018] [Figure 1] FIG. 1 is a left side view of a utility vehicle. [Figure 2] FIG. 2 is a cross-sectional view showing the configuration of a belt-type continuously variable transmission. [Figure 3] FIG. 4 is a left side view showing the configuration of the air guide section. [Figure 4] FIG. 2 is a plan view showing the configuration of the air guide section. [Figure 5] FIG. 4 is a cross-sectional view of the rear side showing the configuration of the air guide section. [Figure 6] FIG. 2 is a left side view showing the configuration of the engine, the exhaust section, the power transmission section, and the air guidance section. DETAILED DESCRIPTION OF THE INVENTION

[0019] An embodiment of the present invention will be described with reference to the drawings. In the following description, unless otherwise specified, the direction of arrow F in the drawings will be referred to as "front," the direction of arrow B as "rear," the direction of arrow L as "left," and the direction of arrow R as "right." Furthermore, the direction of arrow U in the drawings will be referred to as "up," and the direction of arrow D as "down."

[0020] [Overall configuration of multipurpose vehicle] The multipurpose vehicle of this embodiment will be described below. As shown in Fig. 1, the body of the multipurpose vehicle is provided with left and right front wheels 1 and left and right rear wheels 2 as a traveling device. The left and right front wheels 1 are configured to be steerable and drivable, and are supported at the front of the body frame 3. The left and right rear wheels 2 are configured to be drivable, and are supported at the rear of the body frame 3.

[0021] A front lid 4 is provided at the front of the vehicle body to cover the front portion of the body frame 3 and the like.

[0022] A driver's section 5, on which a passenger can sit, is provided between the front wheels 1 and the rear wheels 2. The driver's section 5 is provided with a rope 6 that covers the riding space. A loading platform 7, which is provided behind the driver's section 5 and can swing up and down, is provided.

[0023] [About the configuration of the loading platform] As shown in FIG. 1, the loading platform 7 includes a bottom plate portion 11, a front wall portion 12, right and left side wall portions 13, and a rear wall portion .

[0024] Right and left support frames 15 are disposed below the loading platform 7 so as to extend in the front-to-rear direction. A bracket 16a (see FIG. 3) connected to the rear of the support member 16 that supports the bottom plate portion 11 from below is supported so as to be swingable about a left-to-right axis P1 of the support frame 15. As a result, the loading platform 7 is supported so as to be swingable up and down about the left-to-right axis P1 of the rear part of the loading platform 7 from a lowered position to a raised position (see FIG. 3) where it is raised upward.

[0025] [Engine configuration] Below the loading platform 7, there are provided an engine E supported on the body, an exhaust section 8 (see Figure 3) that discharges exhaust from the engine E, and a power transmission section 9 that transmits the power of the engine E to the front wheels 1 and rear wheels 2.

[0026] The engine E is provided above left and right rear frame portions 3a provided in the rear portion of the body frame 3. A water temperature sensor S1 is provided on one side of the upper portion of the engine E. The water temperature sensor S1 measures the temperature of the coolant for the engine E.

[0027] [Exhaust section configuration] As shown in Fig. 3, the exhaust section 8 has an exhaust pipe 21 connected to the engine E and an exhaust muffler 22 connected to the exhaust pipe 21. The exhaust pipe 21 is connected to the front of the engine E. The exhaust pipe 21 is bent leftward and extends rearward so as to pass over the left side of the engine E. The exhaust pipe 21 is connected to the exhaust muffler 22 provided at the left rear of the engine E.

[0028] The exhaust gas from the engine E is discharged through the exhaust pipe 21 to the exhaust muffler 22, and is then discharged into the atmosphere while being silenced by the exhaust muffler 22. Because the exhaust gas from the running engine E is hot, the exhaust pipe 21 and the exhaust muffler 22 become hot due to this exhaust gas.

[0029] [Configuration of the power transmission section] As shown in FIG. 1, the power transmission section 9 has a belt-type continuously variable transmission 31 provided laterally of the engine E, and a transmission case 51 supported on the aircraft body behind the engine E and housing a gear transmission (not shown).

[0030] As shown in FIGS. 2 and 5, the belt-type continuously variable transmission 31 is provided on the left side of the exhaust pipe 21. As shown in FIG. 2, the belt-type continuously variable transmission 31 has a transmission case 32, which houses a belt pulley 33a provided on the front side of the transmission case 32, a belt pulley 33b provided on the rear side of the transmission case 32, and an endless belt 34 wound around the belt pulleys 33a and 33b. The belt pulleys 33a and 33b are each formed of a pair of half pulley bodies, and the belt winding diameters of the belt pulleys 33a and 33b can be changed. The belt-type continuously variable transmission 31 changes the belt winding diameters of the belt pulleys 33a and 33b to continuously change the speed of input power and output it. The belt-type continuously variable transmission 31 receives the driving force of the engine E, continuously changes the speed of the transmitted power, and outputs the power to the transmission case 51 .

[0031] The driving force transmitted from the belt-type continuously variable transmission 31 is input to the transmission case 51 via the input shaft 52, and the input driving force is transmitted to the left and right rear wheels 2. The driving force is further transmitted to the left and right front wheels 1 (see FIG. 1) via the propeller shaft 18 (see FIG. 1).

[0032] [Configuration for cooling the exhaust section] 2, a rotary fan 35 is provided inside the transmission case 32. The rotary fan 35 is integrally formed with one half of the belt pulley 33b, and when the belt pulley 33b is driven, the rotary fan 35 drives together with the belt pulley 33b.

[0033] As shown in FIG. 1, an intake duct 36 is connected to the rear of the transmission case 32. The intake duct 36 is made up of a driver's section frame portion 3b provided in a portion of the body frame 3 corresponding to the driver's section 5, and a communication pipe 37 that connects the rear end of the driver's section frame portion 3b to the transmission case 32. The driver's section frame portion 3b is made of steel pipe material. The driver's section frame portion 3b is used for the intake duct 36. A cooling air intake 38 is opened at the front end of the driver's section frame portion 3b. The intake 38 is opened inside the front lid 4.

[0034] An exhaust duct 39 is connected to the front of the transmission case 32. The exhaust duct 39 is provided so as to extend upward and rearward.

[0035] 4, the exhaust duct 39 has an exhaust port 40 at its end. In this embodiment, the exhaust port 40 is disposed on the left side of the exhaust unit 8 and is configured to open toward the exhaust unit 8. The exhaust port 40 is fixed to the support frame 15 with bolts via fixing members 40a.

[0036] Air located inside the front lid 4 is taken in through an intake port 38 by the suction force generated by the rotation of the rotary fan 35. The taken-in air is drawn into the inside of the transmission case 32 via the intake duct 36 and the communication pipe 37, generating cooling air inside the transmission case 32. The generated cooling air cools the belt-type continuously variable transmission 31. The cooling air generated inside the belt-type continuously variable transmission 31 is guided to an exhaust port 40 by an exhaust duct 39 by the blowing force generated by the rotation of the rotary fan 35, and is discharged to the outside of the belt-type continuously variable transmission 31. The cooling air discharged from the exhaust port 40 cools the exhaust section 8.

[0037] [Configuration of the airflow guidance section] As shown in FIGS. 3 and 4, in this embodiment, an airflow guidance section 41 is provided on the right side of the exhaust section 8 to guide the cooling air discharged from the exhaust port 40 to the object to be cooled.

[0038] In this embodiment, the air guide section 41 is made up of a first air guide plate 42 supported on the body of the vehicle and a second air guide plate 43 supported on the loading platform 7. As shown in Fig. 6, the first air guide plate 42 and the second air guide plate 43 are arranged in positions that overlap with the exhaust port 40 in a side view.

[0039] The first air guide plate 42 is made of a metal plate. The first air guide plate 42 is made up of a main body portion 42a which is the upper portion of the first air guide plate 42, and a supported portion 42b which is formed to be continuous with the lower portion of the first air guide plate 42. The main body portion 42a is formed in a substantially rectangular shape. The supported portion 42b has an edge which is located opposite the second air guide plate 43 and is formed in a downwardly tapering shape which approaches the second air guide plate 43 as it goes downward.

[0040] As shown in FIGS. 3 and 5, the first baffle plate 42 is supported on the airframe via the engine E and the transmission case 51. Specifically, the first baffle plate 42 is supported on the engine E and the transmission case 51 using a lower support member 44a and a vertical support member 44b, which are support members 44. The lower support member 44a is fastened to the ceiling of the engine E using bolts Bo1. The vertical support member 44b is connected to the upper surface of the lower support member 44a using bolts and is configured to extend upward. An upper portion of the vertical support member 44b is fastened to the side wall of the engine E using bolts Bo2. The first baffle plate 42 has a supported portion 42b fixed to the vertical support member 44b with a bolt.

[0041] The first air guide plate 42 is supported in a state extending in the front-to-rear and up-down directions of the aircraft. The water temperature sensor S1 provided in the engine E is provided on the side of the engine E where the exhaust section 8 is located. As shown by the arrows in Figure 4, the first air guide plate 42 is configured to guide the cooling air discharged from the exhaust port 40 to the water temperature sensor S1, which is the object to be cooled. This configuration makes it possible to efficiently cool the water temperature sensor S1, which has electronic components.

[0042] The second air guide plate 43 is provided behind the first air guide plate 42 and aligned in the fore-and-aft direction of the airframe with the first air guide plate 42. The second air guide plate 43 is made of a flexible member such as rubber.

[0043] The second air guide plate 43 is supported by a lateral frame 17 that supports the bottom plate portion 11 of the loading platform 7 from below. The lateral frame 17 is provided below the loading platform 7 to extend in the left-right direction of the vehicle body. The second air guide plate 43 is fixed to the lateral frame 17 via an attachment member 45. The attachment member 45 has a U-shaped attachment portion 45a that corresponds to the shape of the lateral frame 17.

[0044] The mounting member 45 is fastened to the horizontal frame 17 by a bolt Bo3 that passes through the bottom of the U-shape, with the mounting portion 45a fitted into the horizontal frame 17. The mounting member 45 has two plate-shaped support portions 45b that extend from both vertically extending portions of the U-shape of the mounting portion 45a in the width direction of the mounting portion 45a, i.e., in a direction perpendicular to the extension direction of the horizontal frame 17.

[0045] A notch 43a corresponding to the shape of the attachment portion 45a is formed in the upper portion of the second air guide plate 43. A portion of the second air guide plate 43 adjacent to the notch 43a in the width direction is fixed to the support portion 45b, and the second air guide plate 43 is supported by the lateral frame 17 of the cargo bed 7 via the attachment member 45.

[0046] The front portion of the second air guide plate 43 is configured to extend in the front-rear and up-down directions. The rear portion of the second air guide plate 43 is configured as an inclined portion 43b that inclines toward the exhaust port 40 as it approaches the rear of the aircraft. The exhaust section 8 is provided with an oxygen concentration sensor S2 that measures the oxygen concentration in the exhaust of the engine E. As shown by the arrows in Figures 4 and 5, the inclined portion 43b of the second air guide plate 43 is configured to guide the cooling air discharged from the exhaust port 40 to the oxygen concentration sensor S2, which is to be cooled. This configuration makes it possible to efficiently cool the oxygen concentration sensor S2, which has electronic components.

[0047] [Another embodiment] Hereinafter, another embodiment in which the above embodiment is modified will be exemplified.

[0048] (1) In the above embodiment, an example was described in which the exhaust port 40 is arranged on the left side of the exhaust section 8 and the air guide section 41 is arranged on the right side of the exhaust section 8. However, the present invention may be configured such that the exhaust port 40 is arranged on one side of the exhaust section 8 and the air guide section 41 is arranged on the other side of the exhaust section 8. For example, the present invention may be configured such that the exhaust port 40 is arranged on the right side of the exhaust section 8 and the air guide section 41 is arranged on the left side of the exhaust section 8.

[0049] (2) In the above embodiment, the air guide section 41 is described as being composed of two plate-shaped members, the first air guide plate 42 and the second air guide plate 43. However, the present invention is not limited to the above embodiment, and the air guide section 41 may be composed of one plate-shaped member, or may be composed of three or more plate-shaped members.

[0050] (3) In the above embodiment, the first air guide plate 42 is supported on the airframe via the engine E and the transmission case 51, and the second air guide plate 43 is supported on the cargo bed 7. However, the present invention is not limited to the above embodiment. For example, both the first air guide plate 42 and the second air guide plate 43 may be supported on the airframe. Furthermore, the first air guide plate 42 and the second air guide plate 43 may be supported at other locations, for example, on the exhaust section 8.

[0051] (4) In the above embodiment, the first air guide plate 42 is made of a metal plate, and the second air guide plate 43 is made of a flexible material such as rubber. However, the present invention is not limited to the above embodiment. For example, the first air guide plate 42 and the second air guide plate 43 may both be made of flexible materials.

[0052] (5) In the above embodiment, the water temperature sensor S1 and the oxygen concentration sensor S2 are listed as objects to be cooled. However, the present invention is not limited to the above embodiment. For example, other sensors may be the objects to be cooled. Furthermore, the engine E may be the object to be cooled, and the cooling air discharged from the exhaust port 40 may be configured to be guided to the engine E.

[0053] The configurations disclosed in the above embodiments (including other embodiments, the same applies hereinafter) can be applied in combination with configurations disclosed in other embodiments, unless a contradiction arises. Furthermore, the embodiments disclosed in this specification are merely examples, and the present invention is not limited to these, and can be modified as appropriate within the scope of the purpose of the present invention. [Industrial Applicability]

[0054] The present invention is applicable to multipurpose vehicles used for transporting people, carrying luggage, recreation, and the like. [Explanation of symbols]

[0055] 7 Cargo bed 8 Exhaust section 31 Belt-type continuously variable transmission 40 exhaust port 41 Air guide section 42 First wind guide plate 43 Second wind guide plate 43b Slope S1 Water temperature sensor S2 oxygen concentration sensor E-Engine

Claims

1. An engine mounted on the aircraft; an exhaust section that discharges exhaust gas from the engine; a belt-type continuously variable transmission to which driving force from the engine is transmitted; an exhaust port that discharges cooling air taken in to cool the inside of the belt-type continuously variable transmission from the inside of the belt-type continuously variable transmission to the outside, the exhaust port is disposed on one side of the exhaust section, an airflow guidance section is provided on the other side of the exhaust section to guide the cooling air discharged from the exhaust port to the object to be cooled; The air guide section is a multipurpose vehicle having a first air guide plate and a second air guide plate aligned in the fore-and-aft direction of the vehicle body and each of which is formed by a plate-shaped member extending along the fore-and-aft direction of the vehicle body.

2. An engine mounted on an aircraft; an exhaust section that discharges exhaust gas from the engine; a belt-type continuously variable transmission to which driving force from the engine is transmitted; an exhaust port that discharges cooling air taken in to cool the inside of the belt-type continuously variable transmission from the inside of the belt-type continuously variable transmission to the outside, the exhaust port is disposed on one side of the exhaust section, an airflow guidance section is provided on the other side of the exhaust section to guide the cooling air discharged from the exhaust port to the object to be cooled; The vehicle body is provided with a loading platform that can swing up and down, The exhaust port is disposed below the loading platform, The air guide section of the multipurpose vehicle includes a first air guide plate supported on the body and a second air guide plate supported on the loading platform.

3. the second air guide plate is provided rearward of the first air guide plate and aligned with the first air guide plate in the fore-and-aft direction of the airframe, 3. The multipurpose vehicle according to claim 2, wherein a rear portion of the second air guide plate is provided with an inclined portion that inclines toward the exhaust port as it approaches the rear of the vehicle body.

4. 4. The multipurpose vehicle according to claim 2, wherein the first air guide plate is made of a metal plate, and the second air guide plate is made of a flexible member.

5. the engine is provided with a water temperature sensor that measures a coolant temperature of the engine on a side of the engine where the exhaust portion is located, The multipurpose vehicle according to claim 1 , wherein the object to be cooled is the water temperature sensor.

6. The exhaust section is provided with an oxygen concentration sensor that measures the oxygen concentration of the exhaust of the engine, The multipurpose vehicle according to claim 1 , wherein the object to be cooled is the oxygen concentration sensor.

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