JP2007302138A - Mobile agricultural machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile agricultural machine which shuts off exhaust heat of a muffler and an engine relative to a fuel tank. <P>SOLUTION: A bracket 18 for mounting the fuel tank 16 to an upper side of the engine 6 is structured for mounting the fuel tank 16 to an upper part in the state where it is fixed to the engine 6, and a shutting off plate 37 raised and inclined toward an outer side is integrally provided on the bracket 18. The shutting off plate 37 is arranged between the fuel tank 16 and the muffler 12 so as to shut off the exhaust heat of the muffler 12 from the fuel tank 16. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a mobile agricultural machine in which a fuel tank is disposed above an engine and a muffler is disposed on the side of the fuel tank.

Conventionally, a management machine in which a fuel tank is disposed above an engine and a muffler is disposed on the side of the fuel tank is known as a mobile farm machine (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 9-2083

  Exhaust heat is generated from the engine and muffler. Since the fuel tank is attached above the engine and to the side of the muffler, the management machine has a drawback that the temperature of the fuel tank may increase due to the exhaust heat.

  The mobile agricultural machine of the present invention for solving the above problems is a mobile agricultural machine in which a fuel tank 16 is disposed above the engine 6 and the muffler 12 is disposed on the side of the fuel tank 16. A bracket 18 to be attached is provided, the bracket 18 is fixed to the engine 6, and the fuel tank 16 is attached to the bracket 18 in a state where the bracket 18 is fixed to the engine 6, and the bracket 18 is inclined upward toward the outside. The shielding plate 37 is provided integrally, and the shielding plate 37 is disposed between the fuel tank 16 and the muffler 12 so as to shield the exhaust heat from the muffler 12 from the fuel tank 16. It is a feature.

  Second, an auxiliary shielding plate 38 that covers the upper portion of the rear end of the engine 6 corresponding to the rear end position of the muffler 12 is provided integrally with the bracket 18, and the auxiliary shielding plate 38 is disposed below the fuel tank 16. It is characterized by.

  Thirdly, a muffler cover 13 that covers the outer periphery of the muffler 12 is provided, and the shielding plate 37 is arranged so that the outer end overlaps the muffler cover 13 in plan view.

  According to the structure of the present invention configured as described above, the fuel tank can be disposed and attached above the engine by the bracket, and the heat exhaust generated from the muffler by the shielding plate provided integrally with the bracket. Is shielded from the fuel tank, and an increase in the temperature of the fuel tank due to the exhaust heat can be suppressed. Since the shielding plate is provided integrally with the bracket, it is not necessary to provide a dedicated shielding plate, and the number of components can be reduced.

  If an auxiliary shielding plate that covers the upper part of the side end at the rear of the engine corresponding to the rear end position of the muffler is provided integrally with the bracket, the auxiliary shielding plate is arranged below the fuel tank, so that exhaust heat from the engine is assisted. There is an advantage that the fuel tank is shielded by the shielding plate and an increase in the temperature of the fuel tank due to the exhaust heat of the engine can be suppressed. Since there is no need to provide a dedicated auxiliary shielding plate, the number of parts can be reduced.

  By providing a muffler cover that covers the outer periphery of the muffler and arranging the shielding plate so that the outer end overlaps the muffler cover in plan view, the exhaust heat exhausted from the end of the shielding plate is guided to the outside. Thereby, discharge of the exhaust heat to the bonnet side is restricted, and an increase in temperature on the bonnet side can be suppressed.

  1 and 2 are a rear perspective view and a side view of a walking type management machine which is a mobile farm machine adopting the present invention. The mission case 1 constitutes a part of the aircraft frame. A wheel 3 is attached to an axle 2 protruding from the mission case 1. On the rear side of the wheel 3, a rotary 4 that is a tilling device for tillage is provided.

  Above the mission case 1, an engine 6 is mounted on the body frame side. A driving force is transmitted from the engine 6 to the transmission configured in the transmission case 1 via the transmission unit 7.

  A handle 8 is attached to the mission case 1 so as to protrude obliquely rearward and upward. A clutch operating lever 9 is swingably provided on the handle 8. By the swing operation of the clutch operation lever 9, the clutch provided in the transmission unit 7 is operated, and the driving force from the engine 6 to the transmission is turned on and off. The wheels 3 and the rotary 4 are rotationally driven by transmission of driving force from the engine 6 to the transmission.

  An operation lever 11 protrudes rearward from the mission case 1. A shifting operation of the traveling speed (the driving speed of the wheels 3) and a shifting operation of the driving speed and the rotational direction of the rotary 4 can be performed by swinging the shift lever 11.

  In this walking type management machine, the wheel 3 is grounded and the operator holds the handle 8 to operate the engine 6 and the clutch operating lever 9 transmits the driving force from the engine 6 to the transmission. The vehicle body is caused to travel by driving the wheels 3 by performing a shifting operation of the traveling speed and a driving speed and rotational direction of the rotary 4, and a tilling operation is performed by the rotary 4 that rotates as the aircraft travels. Can do.

  As shown in FIGS. 3 and 4, a muffler 12 is provided on the side of the engine 6. The muffler 12 is supported and attached to the engine 6 by an exhaust pipe 15 for exhaust from the engine 6. The muffler 12 is covered with a muffler cover 13. An exhaust pipe 14 of the muffler 12 protrudes from the front of the muffler cover 13.

  As shown in FIGS. 3 and 4, a fuel tank 16 is provided above the engine 6. The fuel tank 16 is attached to an upper portion of a bracket 18 that is integrally fixed to the engine 6 via bolts 17.

  The upper part of the fuel tank 16 is covered with a bonnet 19. The bonnet 19 is attached to the bracket 18. A fuel filler port 22 having a cap 21 is provided on the upper surface of the fuel tank 16. The fuel can be supplied from the fuel filler port 22 by removing the cap 21.

  The bracket 18 is made of a plate as shown in FIGS. The bracket 18 includes a tank receiver 23 that receives the bottom surface of the fuel tank 16. The tank receiving portion 23 is formed of a flat plate that is curved so as to substantially follow the bottom surface of the fuel tank 16.

  An engine mounting portion 24 that protrudes downward is provided at both left and right end portions of the tank receiving portion 23. Each engine mounting portion 24 is provided with a mounting hole 26. The bracket 18 is fixed to the engine 6 as shown in FIGS. 3 and 4 by inserting the bolt 17 into the mounting hole 26 and screwing the bolt 17 into the case of the engine 6.

  A tank rear end fixing portion 27 protruding upward is provided at the rear end of the tank receiving portion 23. A tank front end fixing portion 28 extending obliquely downward is provided at the front end of the tank receiving portion 23. A mounting bracket 29 protruding upward is integrally fixed to the tank front end fixing portion 28 by welding or the like.

  As shown in FIGS. 3 and 4, a flange 16 a provided behind the fuel tank 16 is fixed to the tank rear end fixing portion 27 by a bolt 31. As shown in FIGS. 3 and 4, a flange 16 b provided in front of the fuel tank 16 is fixed to the mounting bracket 29 by a bolt 32.

  As described above, the fuel tank 16 is fixedly attached to the tank front end fixing portion 28 and the tank rear end fixing portion 27 so as to be mounted on the upper surface side of the tank receiving portion 23 in the bracket 18. The tank receiving portion 23 is formed with a notch 33 so as to avoid a float protrusion for detecting the amount of fuel in the fuel tank 16. The tank receiving portion 23 is formed with a hole portion 34 for exposing the fuel delivery portion of the fuel tank 16 toward the engine 6 side.

  A substantially horizontal heat exhaust guide plate 36 protruding leftward is integrally provided on the tank receiving portion 23 of the bracket 18 by welding or the like. On the left side of the exhaust heat guide plate 36, as shown in FIG. 7, a shielding plate 37 located between the muffler cover 13 and the fuel tank 16 protrudes to the left side (outside) while being inclined upward, and is integrally formed. Is provided.

  As shown in FIG. 7, the shielding plate 37 protrudes slightly above the muffler cover 13, and the outer end overlaps with the muffler cover 13 in plan view. The end of the bonnet 19 on the muffler 12 side is located on the center side (inside) of the machine body from the shielding plate 37. Thereby, the bracket 18 (shielding plate 37) fills the gap between the muffler cover 13 and the bonnet 19 in a plan view, and the appearance is improved, and the entry of dust and the like from the gap is prevented.

  The front portion 37A and the rear portion 37B of the shielding plate 37 are slightly bent downward. The front end portion 37F of the front portion 37A is bent so as to protrude obliquely forward. The rear end portion 37R of the rear portion 37B is bent so as to protrude downward substantially vertically.

  As shown in FIG. 7, the exhaust heat of the muffler 12 is discharged to the outside along the shielding plate 37 and shielded from the fuel tank 16. Further, the exhaust heat of the muffler 12 is exhausted obliquely forward along the front end portion 37F of the shielding plate 37 and substantially vertically downward along the rear end portion 37R, and is also shielded from the fuel tank 16. In particular, since the heat is exhausted obliquely forward along the front end portion 37F, the inconvenience that the exhaust heat hits the front side of the bonnet 19 is prevented.

  An auxiliary shielding plate 38 is disposed at a position behind the exhaust heat guide plate 36 at a predetermined distance from the rear edge of the exhaust heat guide plate 36. The auxiliary shielding plate 38 is integrally provided at the rear right end portion of the shielding plate 37. The space 17 formed between the exhaust heat guide plate 36 and the auxiliary shielding plate 38 allows the bolt 17 to be easily tightened and loosened, and the bracket 18 can be easily attached to and detached from the engine 6.

  The auxiliary shielding plate 38 covers the upper portion of the side end at the rear of the engine 6 corresponding to the rear end portion of the muffler cover 13, and is disposed between the engine 6 and the fuel tank 16. As shown in FIG. 7, the exhaust heat on the muffler 12 side behind the engine 6 is guided to the shield plate 37 side by the auxiliary shield plate 38, and is shielded and discharged from the fuel tank 16 together with the exhaust heat of the muffler 12. Is done.

  Since the auxiliary shielding plate 38 is provided integrally with the bracket 18, it is not necessary to provide a dedicated auxiliary shielding plate, and the number of components can be reduced. The exhaust heat guide plate 36 covers the upper part of the side end of the engine 6 at a position ahead of the auxiliary shield plate 38, guides the exhaust heat from the engine 6 toward the shield plate 37, and shields it from the fuel tank 16. .

  As shown in FIG. 7, an air flow passage 39 is formed between the bracket 18 and the fuel tank 16. As shown in FIG. 3, the fuel tank 16 is cooled from the lower side by the cooling air flowing through the air flow passage 39. The air flow passage 39 and the exhaust heat flow passage of the muffler 12 are separated by a shielding plate 37, a waste heat guide plate 36, and an auxiliary shielding plate 38.

  For this reason, mixing of the air for cooling the fuel tank 16 and the exhaust heat is prevented, and the cooling efficiency is improved. Air also flows through the exhaust heat flow passage as shown in FIG. This air guides the discharge of exhaust heat as described above, and cools the exhaust heat and radiant heat from the muffler 12 and the like.

  As described above, by attaching the fuel tank 16 to the upper side of the engine 6 via the bracket 18, the exhaust heat from the engine 6 and the muffler 12 is transferred by the shielding plate 37, the auxiliary shielding plate 38, and the exhaust heat guide plate 36. The fuel tank 16 is efficiently cooled by the air flow passage 39. Thereby, the temperature rise of the fuel tank 16 due to the exhaust heat is suppressed.

  As described above, the outer end of the shielding plate 37 overlaps with the muffler cover 13, and the muffler side end of the bonnet 19 is located on the center side (inner side) of the body from the shielding plate 37. When fuel is supplied when fuel is leaked, the fuel flowing through the hood 19 to the muffler side is guided by the shielding plate 37, and the fuel is prevented from being applied to the muffler 12 side (muffler cover 13).

  As described above, the shielding plate 37 and the auxiliary shielding plate 38 are integrally connected to the tank receiving portion 23 by the exhaust heat guide plate 36. Therefore, as shown in FIGS. 5 and 6, ribs 41 are formed on the exhaust heat guide plate 36 by press working or the like. The rib 41 improves the strength of the exhaust heat guide plate 36, stabilizes the shape of the bracket 18, and prevents vibrations and the like.

It is a perspective view of a management machine. It is a side view of a management machine. It is a top view of an engine, a fuel tank, a muffler, and a bonnet part. It is a side view of an engine, a fuel tank, a muffler, and a bonnet part. It is a top perspective view of a bracket. It is a bottom perspective view of a bracket. It is AA sectional drawing of FIG.

Explanation of symbols

6 Engine 16 Fuel tank 12 Muffler 18 Bracket 37 Shield plate 38 Auxiliary shield plate

Claims (3)

  A bracket for attaching the fuel tank (16) to the engine (6) in the mobile agricultural machine in which the fuel tank (16) is disposed above the engine (6) and the muffler (12) is disposed on the side of the fuel tank (16). (18) is provided, the bracket (18) is fixed to the engine (6), and the bracket (18) is fixed to the engine (6) so that the fuel tank (16) is attached to the upper part, The bracket (18) is integrally provided with a shielding plate (37) inclined upward toward the outside, and the shielding plate (37) shields the exhaust heat from the muffler (12) from the fuel tank (16). As described above, the mobile agricultural machine arranged between the fuel tank (16) and the muffler (12).   An auxiliary shielding plate (38) covering the upper portion of the side end at the rear of the engine (6) corresponding to the rear end position of the muffler (12) is provided integrally with the bracket (18), and the auxiliary shielding plate (38) is provided as a fuel tank. The mobile agricultural machine according to claim 1 disposed below (16). The mobile agricultural machine according to claim 1 or 2, wherein a muffler cover (13) covering the outer periphery of the muffler (12) is provided, and the shielding plate (37) is arranged so that an outer end thereof overlaps with the muffler cover (13) in plan view.

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