JPH0568224U - Walkable combine muffler mounting structure - Google Patents

Abstract

(57) [Summary] [Object] The present invention improves the heat balance in the engine part of a walk-behind combine and reduces the effects of exhaust heat and noise on the operator. An exhaust pipe 23 is vertically provided at a rear position on the opposite side of a front visual space 9 in an engine part 3 provided below an operation part 8, and a muffler attached to a lower end of the exhaust pipe 23 is horizontally provided at a lower part of a rear part of an engine 14. At the same time, the exhaust pipe (tail pipe) 33 is opened to a position outside the machine body 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a muffler mounting structure for a walk-type combine.

[0002]

[Prior Art]

 Conventionally, a walk-behind combine has an engine section 3 mounted behind a machine frame 2 of a machine body 1, a crawler traveling section 4 is attached to a lower part of the machine body 1 as shown in FIG. A section 6 is provided, and an operation section 8 is provided above the engine section 3 and is provided with levers 7 such as clutch levers for operation and steering. During mowing work or traveling, the operator can operate while confirming the front from the front visual recognition space 9 on the upper right side or the upper right outside of the engine unit 3 and the operation unit 8. The operating portion 8 is provided with a cover 10 as shown in FIGS. 2 to 4, and the cover 10 is provided with slit-shaped lever guides 10a through which the above-mentioned levers 7 are inserted. Reference numeral 15 is a handle frame that projects rearward of the operation portion 8 in a U shape. In the engine section 3, for example, as shown in Japanese Utility Model Laid-Open No. 2-124216 and Japanese Utility Model Laid-Open No. 51-84941, a muffler vertically compactly integrated is used behind the engine body. .

[0003]

[Problems to be solved by the device]

 However, in the muffler arrangement structure as described above, other devices may be arranged so as to surround the engine part, and the exhaust heat of the engine may flow inside the engine cover or toward the rear, especially around the periphery as the aircraft progresses. As a result, the exhaust heat and noise to the operator are badly affected, and the working environment of the operator who works while checking the front is extremely bad. This invention intends to provide a muffler mounting structure for a walk-type combine that overcomes these drawbacks.

[0004]

[Means for Solving the Problems]

 The muffler mounting structure of the present invention for solving the above-mentioned problem is a walk-type combine in which the engine 14 is mounted below the driving operation unit 8, and the engine 14 to the muffler 24 is provided on the opposite side of the operator's front visual space 9. The exhaust pipe 23 is extended downward, and a muffler 24 is laterally provided in the left and right direction of the airframe below the operating portion 8 at a position behind the engine, and an exhaust pipe 33 from the muffler 24 is opened to a position outside the airframe. It is characterized by that.

[0005]

[Action]

 Since the exhaust pipe 23 from the engine 14 is provided on the opposite side of the front visual confirmation space 9, there is no heat exhaustion and heat dissipation to the front visual confirmation space 9 side, and the muffler 24 is also laid laterally in the lower rear portion of the engine unit 3. Exhaust heat, heat radiation, and noise from the muffler 24 are also removed from the operator's upper body, and escaped toward the lower and outer sides of the engine section, so that adverse effects of heat and noise on the operating operator are avoided. Further, the occurrence of a fire due to the accumulation of dust in the engine section 3 is prevented, and the influence of muffler heat on the heat balance in the engine section 3 is reduced.

[0006]

【Example】

 The drawing shows one embodiment of the present invention, in which an engine 14 provided with a recoil pulley 12, a cooling air introduction fan 13 (see FIG. 5) and the like is housed in the engine cover 11 of the engine part 3. The lower part of the right outer cover 11a is open, a dustproof net 16 is attached to the rear end face side, and air is taken in as shown by arrows A and B, and it passes through the inside of the recoil cover 17 and is cooled by the cooling air introduction fan 13 to drive the engine. It is introduced to the 14 side as indicated by arrows C and D, and is further introduced and discharged to the engine head side such as the engine air-cooling section and the exhaust side as indicated by arrows E and F.

A scraper 19 is mounted in close proximity to the side surface of the recoil pulley 12 having a large number of radial protrusions 18 on the outer surface side to cut off dust such as straw dust sucked from the outside. It has a structure that prevents large debris from being sucked into the engine 14 side. An air cleaner 22 is provided behind the engine 14 at a position partitioned from the engine 14 side by a partition wall 21 so that the air cleaner 22 does not absorb high temperature exhaust gas on the engine side.

The exhaust pipe 23 from the engine is guided rearward on the opposite side of the front view space 9 (inside the fuselage) above the outer side of the engine part 3 and extends downward, and its lower end is located below the rear part of the engine 14. It is connected to a muffler 24 that is horizontally installed in the space inclined rearward. The upper portion of the exhaust pipe 23 is covered so as to be surrounded by the air guide plate 26 fixed to the engine 14 and other covers or frames, and as shown by arrows G and H, the engine cooling exhaust air is exhausted. The exhaust pipe 23 is further cooled by guiding the exhaust gas and exhausted toward the lower rear. An upper cover 28 and an upper side cover which cover the upper portion of the engine 14 by partitioning the space between the upper portion of the engine portion 3 and the operating portion 8 so as to form a space 27 above the air guide plate 26. 29 is provided so that the upper surface of the upper cover 28 can receive dust such as straw dust that has fallen from the operation portion 8 side, and the space 27 has an open end at the rear and inner sides, and It has a mechanism that can be easily removed.

The outer periphery of the downward portion of the exhaust pipe 23 is surrounded by the exhaust cover 31 which is attached downward from the rear end left side of the upper cover 28 (the non-visual space 9 side) in a U-shape on the rear side and the left and right sides. Therefore, the cooling exhaust air passes through the inside thereof and is discharged downward from the lower open end side as shown by arrows I, J, and K to the outside. On the other hand, the muffler 24 is surrounded by a muffler cover 32 that is a bottom open type that extends over the entire width so that the high temperature air due to the heat radiation is not discharged to the air cleaner 22 side or the upper part, and the exhaust pipe (tail pipe) 33 from the muffler 24 is forward. A tail pipe 34 is fixedly provided on the body frame side so as to open downward and form a double pipe so as to surround the exhaust pipe 33. The air that has cooled the muffler 24 is discharged to the outside from the lower part of the muffler cover 32, and the hot air around the muffler 24 in the sealed state is discharged from the tail pipe 34 by suction from the rear opening end of the tail pipe 34, and The hot air in the cover 32 is discharged.

Due to the exhaust structure in the engine portion 3 as described above, the engine cooling air can also cool the exhaust pipe 23 and the muffler 24 together, and the recoil starter and the air cleaner 22 generate high-heat exhaust air. Since it is blocked by partition walls and covers from the road, the effect of high temperature exhaust air on them is prevented.

An output pulley 36 is rotatably supported on a PTO shaft on the output side of the engine 14, and an inside of the pulley 36 is bent to have an L-shaped section for attaching a belt guide (not shown) to the pulley 3b. The belt guide mounting plate 37 is attached to guide the exhaust air downward in the engine room with the belt guide.

Further, between the support beam 38, which is erected so as to fix and support the handle frame 15 on the machine body frame 2, and the end surface of the L-shaped bent end of the belt guide mounting plate 37, a protection beam is provided. A vibration bolt 39 is fixedly mounted in the front-rear direction so as to be adjustable, and a vibration-proof rubber 41 is mounted on the bolt side between the tip of the vibration-proof bolt 39 and the bent end surface of the belt guide mounting plate 37. It is inserted and has a structure that prevents vibration of the engine 14.

[0013]

[Effect of the device]

 According to the structure of the present invention configured as described above, the influence of heat and noise on the operator working while checking the front is reduced, and the muffler is provided away from the engine body, so that the muffler for the engine heat balance is provided. The influence of heat can be reduced. Further, since the tail pipe is provided at the position outside the machine body, there is an advantage that the risk of fire due to ignition of dust accumulation in the machine body can be prevented.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a walk-behind combine.

FIG. 2 is an outside view of the engine section of the walk-behind combine.

FIG. 3 is a rear view of the engine section.

FIG. 4 is an inner side view of the engine section.

FIG. 5 is a plan sectional view of a recoil starter in the engine section of the same.

[Explanation of symbols]

 8 Operation part 9 Front view space 14 Engine 23 Exhaust pipe 24 Muffler 27 Space 28 Cover

Claims (1)

[Scope of utility model registration request] 1. An engine (1) is provided below a driving operation section (8).
In a walk-behind combine equipped with 4), the engine (1
Exhaust pipe (2) from 4) to muffler (24)
3) is extended downward, and a muffler (24) is provided laterally in the left-right direction of the machine below the operating part (8) at a position behind the engine, and an exhaust pipe (33) from the muffler (24) is provided.
A muffler mounting structure for a walk-type combine that opens to the outside of the fuselage.