JP2890230B2 - Engine cover structure for engine for work equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine cover structure for a working machine engine in which a power take-off shaft connected to a working portion projects downward from an engine body.

[0002]

2. Description of the Related Art Japanese Patent Publication No. 5-29771 discloses a work machine engine whose periphery is covered with a resin engine cover.
And JP-B-63-26263 are conventionally known.

[0003] With reference to Japanese Patent Publication No. 5-29771, in a conventional working machine engine, an engine cover for covering an engine body has a tubular central portion formed by integrally joining two members at a central split surface, It is composed of a total of four members: an end face side portion that closes one end opening of the central portion, and a lid portion that closes the other end opening. In addition,
According to Japanese Patent Publication No. 26263/1993, a conventional engine cover has a cylindrical central portion that covers the engine body, one end surface side portion that covers both ends of the central portion, and a lid portion, for a total of 3 parts.
It is composed of members.

[0004]

In the above-mentioned conventional engine for a working machine, the engine cover is composed of a total of four or three members, so that not only the number of parts increases but also the end face side portion or the lid. Even if the part is removed from the central part, there is a problem that maintenance is difficult due to the distance between the opening and the engine body.

The present invention has been made in view of the above circumstances, and provides an engine cover structure for an engine for a working machine which can easily perform maintenance of an engine and auxiliary machines and has a small number of parts. The purpose is to:

[0006]

Means for Solving the Problems To achieve the above object, an invention according to claim 1 is directed to an engine for a working machine in which a power take-off shaft connected to a working section projects downward from an engine body. , An engine body having an axis of a cylinder barrel disposed in the front-rear direction which is a traveling direction of a working machine, and a muffler and a carburetor attached to the engine body.
And the air cleaner are the cooling air inlet and the cooling air outlet
This engine is entirely covered with an engine cover
The left cover and the left cover are detachably connected to each other.
It is divided right and left from the right cover, and one of the left and right covers
-Connected to the air cleaner and the carburetor
The fuel cock that opens and closes the fuel supply passage
Mounted independently of the cover, the cooling airflow intake port is left
Formed between the mating surfaces of the rear ends of the cover and the right cover,
The air cleaner is formed integrally with the left or right cover.
The air cleaner case and the air cleaner case
Air cleaner element housed in the air
One of the right and left covers to cover the opening of the lina case
And an air cleaner cover detachably attached to the air cleaner cover .

[0007]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 4, a walking type cultivator T as a working machine includes an engine cover 1 made of synthetic resin which covers an outer periphery of an engine, and a steering handle mounting member is provided below the engine cover 1. The tillage part R constituting the working part is provided via the transmission case 2 and the transmission case 3,
A steering handle 4 extending rearward and upward is provided at an upper end of the steering handle mounting member 2. The cultivating unit R includes a cultivating shaft 5 extending in the left-right direction, a pair of left and right inner rotors 6, 6 and a pair of left and right outer rotors 7, 7 attached to the cultivating shaft 5. Each inner rotor 6 tilling claws 6 ₁ 4, 6 _1;
6 ₂ , 6 ₂ , and the two tillage claws 6 ₁ , 6 ₁
Is bent inward in the left-right direction, and the remaining two tilling claws 6
_2, 6 ₂ is bent outward in the left-right direction. Each of the outer rotors 7 has four tilling claws 7 ₁ ..., And these tilling claws 7 ₁ . The U-shaped steering handle 4 has a joint 8 at its lower end.
And is detachably fixed to the upper end of the steering handle mounting member 2 by a bolt 10 having a handle 9. Handle grips 11, 1 provided at the upper end of the steering handle 4
One of the throttle levers 13 is connected to a cab throttle of the engine via a throttle wire 12.
Is provided. The throttle wire 12 is connected to the cab throttle through cooling air suction ports 69, 69 provided between the handle post 31 and the engine covers 45, 46, which will be described later.

As shown in FIG. 6, the engine E is a single cylinder 2
The cycle engine is provided with an engine body 17 including a crankcase 15 and a cylinder barrel 16.
The engine body 17 is disposed in the front-rear direction with the cylinder barrel 16 positioned on the front side and the crankcase 15 positioned on the rear side. A carburetor 18 is provided on a rear surface of the crankcase 15, and a recoil starter 20 having a handle 19 (see FIG. 5) exposed to the outside of the engine cover 1 is provided on an upper surface of the crankcase 15. Air guide duct 21 provided integrally with the lower portion of the engine body 17, an inlet opening 21 ₁ located on the left and right sides and the rear of the crankcase 15, the cylinder barrel 16
An intermediate aperture 21 ₂ located in the lower portion of the cylinder barrel 1
And an outlet opening 21 ₃ located at the top of the 6.

The engine E is supported on an engine bed 22 having an open upper surface. A flywheel 25 and an automatic centrifugal clutch 26 are supported on a crankshaft 24 projecting downward from the crankcase 15 of the engine E and supported by ball bearings 23 so as to be located inside the engine bed 22. Flywheel 25
Annular cooling fan 27 attached to the upper surface faces the inlet opening 21 ₁ and the intermediate aperture 21 ₂ of the air guide duct 21.

The steering handle mounting member 2 includes a plate-shaped mounting plate 29 fixed to the lower surface of the engine bed 22 with bolts 28, a pipe-shaped transmission connecting member 30 projecting downward from the lower surface of the mounting plate 29, and A pipe-shaped handle post 31 extending rearward and upward from a rear portion of the mounting plate 29; a lower surface of the mounting plate 29;
0 and a plate-like connection reinforcing plate 32 for integrally connecting the rear surface of the handle post 31 and the front surface of the lower end of the handle post 31.

As is apparent from FIG. 4, the connecting reinforcing plate 32 not only reinforces the steering handle mounting member 2 to strengthen the support of the steering handle 4 but also attaches the left and right inner rotors 6, 6. the located tilling claws ₆₁ ... facing portion of which is curved inwardly provided two each tilling claws ₆₁ ...
It has the function of dropping pebbles S and mud sandwiched between them. This not only effectively prevents the inner rotors 6, 6 from being stuck during plowing, but also prevents damage to the transmission case 3 and the transmission coupling member 30 due to collision with the pebbles S.

Returning to FIG. 6, the inside of the transmission case 3 attached to the transmission connecting member 30 of the steering handle attaching member 2 at the lower end thereof via the connecting member 33 is provided with a cylindrical member through a pair of upper and lower ball bearings 34,34. A worm 35 is supported. The cylindrical worm 35 is connected via a transmission shaft 38 to a power take-out shaft 37 of the automatic centrifugal clutch 26 supported by a ball bearing 36. The cylindrical worm 35 meshes with a worm wheel 39 provided on the tilling shaft 5 that supports the inner rotors 6,6 and the outer rotors 7,7. Therefore, the driving force of the engine E is the crankshaft 2
4, transmitted to the tilling shaft 5 via the automatic centrifugal clutch 26, the transmission shaft 38, the cylindrical worm 35, and the worm wheel 39, and drive the inner rotors 6, 6 and the outer rotors 7, 7 provided on the tilling shaft 5. The cylindrical worm 35 and the worm wheel 36 constitute a worm gear.

As is clear from FIG. 6 and FIG. 13, a resistance bar mounting member 40 having a U-shaped cross section is welded to the rear surface of the handle post 31, and is supported by the resistance bar mounting member 40. that L-shaped resistor bar 41 includes a mounting portion 41 ₁ slidably fitted to the resistive rod mounting member 40,
A resistor unit 41 ₂ which extending rearward and downward from the mounting portion 41 _1. By resistance rod mounting member 40 to a plurality of pin holes 41 ₃ ... and formed into the pin hole 40 ₁ and the mounting portion 41 ₁ of the are passed through the pin 42 and fixed by a clip 43, the resistance bar 41 is adjustably vertically positioned Fixed. In a state where the resistance bar 41 is fixed to the resistance bar mounting member 40, the mounting portion 41
₁ Front are in close contact along the rear face of the handle post 31 (see FIGS. 1 and 6). Thus, since the load resistance section 41 ₂ receives a resistance rod 41 is transmitted to the handle post 31 directly, resistance small number of parts simple structure rod 41
Can be firmly supported.

Next, an engine cover 1 for covering the engine E
The structure of will be described. Engine cover 1 made of synthetic resin
It is composed of a left cover 45 and a right cover 46, which are divided into two parts on the left and right sides of a center line extending in the longitudinal direction of the vehicle.
The left cover 45 and the right cover 46 are spigot-fitted to each other at their mating surfaces on the outer periphery, and five bolts 47
(See FIG. 6). On the upper part of the engine cover 1, a carrying handle 52 for an operator to carry the cultivator T is formed integrally.

As is apparent from FIGS. 6 and 8, a stay 55 is fixed to the front wall surface of the crankcase 15 via three bolts 53 and a connecting member 54. Stay 5
Engaging portion 55 ₁ formed on the upper end of the 5 engine cover 1
The left cover 45 and the right cover 46 are supported by the stay 55 by bolts 47 penetrating through a pair of bosses 56 and 57 projecting from the inner surfaces of the bosses.
As is clear from FIGS. 6 and 7, the crankcase 15
A stay 58 is provided upright on the rear upper wall surface, and the stay 58 and a boss 5 protruding from the inner surface of the engine cover 1 are provided.
9, the left cover 45 and the right cover 46 are supported by the stay 58. Thus,
The upper portion of the engine cover 1 is supported by the engine body 17 via two bolts 47, 48 and two stays 55, 58.

As is apparent from FIGS. 6 and 10, the rear upper ends of the left cover 45 and the right cover 46 are integrally connected by bolts 49 penetrating through bosses 60 projecting from the inner surfaces thereof. As further apparent from FIGS. 6 and 9, the front end of the engine bed 22 are projecting bracket 22 ₁ having a groove which is open downwardly, the left cover 45 and right cover 46 of the bracket 22 ₁ groove Ribs 61
Are joined together by bolts 50 in a state where they are fitted. Similarly, the bracket 22 _{and second} grooves projecting from the rear end of the engine bed 22 are coupled together by the rib 62 is fitted 51 of the left cover 45 and right cover 46. Thus,
The rear parts of the left cover 45 and the right cover 46 have one bolt 4
9, the left cover 45 and the right cover 4
6 is an engine bed 2 with two bolts 50 and 51.
2 supported.

As described above, by completely covering the engine E with the left and right divided engine covers 1, the number of parts can be reduced as compared with the case where the engine E and its accessories are covered with separate covers. The sealing of the mating surfaces can be easily performed. Further, it is possible to prevent the noise of the engine E from leaking to the outside, prevent the mud and dust from adhering to the engine E, and improve the appearance.

As is apparent from FIG. 1, the center of gravity CG of the cultivator T is located below and below the carrying handle 52. Therefore, as shown in FIG. 14, when the operator grips the carrying handle 52 and transports the cultivator T, the wide tilling portion R is positioned forward of the operator's body in the left-right direction, and the tilling portion R Transportation is facilitated by avoiding contact with the body. Further, the steering handle attachment member by loosening the nut 28 ₁ screwed on the bolt 28 in FIG. 6 2
The engine E covered by the engine cover 1 is separated from the engine bed 22 so that the engine E covered by the engine cover 1 can be attached to the steering handle mounting member 2, the transmission case 3, the cultivator R, and the steering handle 4.
And can be removed from the resistance bar 41. This makes it possible to share the engine E for applications other than the tiller T, for example, a lawnmower, a sweeper, a mower, a chain saw, and the like. In addition, even when the engine E is detached, it can be easily transported by using the carrying handle 52. Further, since the flat engine bed 22 is located on the lower surface of the engine cover 1, the engine E can be stably mounted on the ground or floor without falling down.

Next, the cooling structure of the engine E mounted inside the cover 1 will be described. As shown in FIGS. 5 and 6, inside the engine cover 1 made of the left cover 45 and right cover 46, a muffler 65 of the exhaust port 65 ₁ towards the front, an exhaust pipe 66, the cylinder barrel 16, the crankcase 15 , Carburetor 18 and air cleaner 6
7 are sequentially arranged from the front to the rear, and the carburetor 1
A fuel tank 68 is arranged above the air cleaner 8 and the air cleaner 67 such that an upper half thereof is exposed from the engine cover 1.

As described above, the engine main body 17 is placed vertically so that the cylinder barrel 16 and the crankcase 15 are located in the front-rear direction, and the muffler 65 and the fuel tank 68 are provided in front and rear of the cylinder barrel 16, respectively. In addition, since the carburetor 18 and the air cleaner 67 are provided below the fuel tank 68, the width in the left-right direction of the engine E including the accessories, that is, the width in the left-right direction of the engine cover 1 is reduced as much as possible. It becomes possible. as a result,
When working in a small space such as a tea plantation, efficient work can be performed by avoiding contact between the aircraft and crops.

An opening extending in the vertical direction is formed on the mating surface of the left cover 45 and the right cover 46 at the rear end of the engine cover 1.
Fits in the lower half. A pair of left and right cooling air inlets 69, 69 are formed between the handle post 31 and the edge of the opening (see FIGS. 5 and 6). The ribs 70, 70 projecting inward from the lower part of the opening approach the outer periphery of the handle post 31 to block the flow of air, so that the cooling air suction ports 69, 69 can be compared at the rear end of the engine cover 1. (See FIG. 4) at a higher position (between the resistance bar mounting member 40 and the bolt 49 connecting the engine cover 1). Accordingly, when the cooling air is sucked into the inside of the engine cover 1 from the cooling air suction ports 69, 69, relatively clean air with little dust and separated upward from the tilling portion R can be sucked. On the other hand, the front end of the engine cover 1 is formed louvered cooling air discharge port 71 is an exhaust port 65 ₁ of the muffler 65 to the hole formed in the lower portion of the cooling air discharge port 71 is opposed I do.

As described above, the cooling air suction ports 69, 69 are formed between the rear ends of the left cover 45 and the right cover 46, so that the resin left cover 45 and the right cover 46 can be molded by a mold. In addition, the cooling air suction ports 69, 69 can be formed using a mold having a simple structure and without performing machining after molding.

As apparent from FIGS. 6 to 8, partitions 72 and 73 extending vertically are integrally formed on the inner surfaces of the left cover 45 and the right cover 46, respectively. Left cover 4
The partition wall 72 formed at 5 has a shape along the outer shape of the stay 55 at an upper portion thereof, and extends downward from the partition wall with a substantially constant width. On the other hand, the partition 73 formed on the right cover 46 has a shape along the outer shape of the stay 55 at an upper portion thereof, and
7 extends downward along the boundary between the crankcase 15 and the cylinder barrel 16. The interior of the engine cover 1 is partitioned by the partition walls 72, 73 into a rear chamber 74 on the side of the cooling air inlets 69, 69 and a front chamber 75 on the side of the cooling air outlets 71, 71 (see FIG. 6). an inlet opening 21 ₁ of the guide duct 21 open to the chamber 74, the outlet opening 21 the _third guide duct 21 into the front chamber 75 is opened.

Thus, the crankshaft 2 of the engine E
4 and a cooling fan 27 integral with the flywheel 25
Is rotated, the negative pressure causes the cooling air inlets 69 and 6 to rotate.
Fuel tank 68 is air sucked from 9 flows into the rear chamber 74, after cooling the carburetor 18 and the crankcase 15, the cooling automatic centrifugal clutch 26 and flows from the inlet opening 21 ₁ in the interior of the air guide duct 21 I do. Wind guide duct 21
Cooling air passing through the intermediate opening 21 ₂ in the cylinder barrel 16
Flows into the front chamber 75 from the outlet opening 21 ₃ is cooled, where it is the exhaust pipe 66 and the muffler 65 is cooled discharged from the cooling wind exhaust port 71 to the outside of the engine cover 1.

As described above, the low-temperature fuel tank 68 and the carburetor 18 are provided on the cooling air suction ports 69, 69, and the intermediate temperature crankcase 15 and the automatic centrifugal clutch 26 are provided on the downstream side. Further, since the high-temperature cylinder barrel 16, the exhaust pipe 66, and the muffler 65 are disposed on the downstream side of the cooling air discharge ports 71, 71, the heat of the cylinder barrel 16, the exhaust pipe 66, and the muffler 65 causes the fuel tank 68 and the muffler 65 to generate heat. Not only is it difficult to reach the carburetor 18, but even if the temperature of the cooling air gradually rises along the flow path of the cooling air,
The temperature difference between the cooled portion and the cooling air is always ensured, and all the cooled portions can be effectively cooled. In addition, the cooling air is sucked in from the rear of the aircraft where the operator is located, and the exhaust gas and the cooling air whose temperature has risen are discharged forward from the front of the aircraft on the side opposite to the operator. There is no risk of deteriorating the working environment or damaging the crops on the ground.

Next, the structure for supporting the fuel tank 68 will be described. As shown in FIG. 6, the fuel tank 68 is integrally formed of a synthetic resin, and has a fuel supply port 6 on its upper surface.
8 ₁ are provided. The lower portion of the fuel tank 68 and the carburetor 18 are connected via a fuel tube 81, and a fuel cock 82 is provided in the middle of the fuel tube 81. As shown in FIG. 10 and FIG.
Of it is formed U-shaped cross section of groove 68 ₂ on the outer periphery,
With this concave groove 68 ₂ lower side part is covered by the engine cover 1, an upper portion exposed upward from engine cover 1. Incidentally, the rear groove 68 ₂ is not turned U-shaped cross section, is open at the bottom (see the right cross section of FIG. 11).

As is apparent from FIG.
Fitted to the support pin 46 ₁ projecting from the, and the left cover 45
Grommet 83 held in support hole 45 ₁ formed in
But it fitted to the front end of the concave groove 68 _2. Also on the outer periphery of the boss portion 60 projecting from the inner surface of the engine cover 1 is left-right pair of the grommet 84, 84 is held, these grommets 84 and 84 are in the recesses 68 ₃ formed in the lower part after the fuel tank 68 Fit. Further, a pair of projections 68 projecting from the left and right sides of the fuel tank 68 _4, 68 _4, fitted to a pair of rubber bushings 85, 85 which is held on the inner surface of the left cover 45 and right cover 46. Thus, the fuel tank 68 is positioned in the front-rear direction by the three grommets 83;
5, 85, and the grommet 83; 84, 84 and rubber bushes 85, 85
Floating support on the engine cover 1. Thus, vibration transmission from the engine E to the fuel tank 68 can be effectively prevented while the fuel tank 68 is stably supported with a small number of parts.

As is clear from FIG. 11, the fuel tank 6
Edge 45 ₂ halves from the engine cover over the opening formed in the left cover 45 and right cover 46 to protrude above the 8, 46 ₂ near the concave fuel tank 68 is bent inwardly and upwardly loosely fitted in a groove 68 in _2. Then, the wall lower surface on the groove 68 ₂ draining rib 68 ₅ is projected downward along the entire length of the concave groove 68 _2. Drainer rib 68 ₅
Are edges 45 ₂ , 46 ₂ of the left cover 45 and the right cover 46
The fuel supply port 68 ₁ of the fuel tank 68 and water droplets flowing down along the side wall of the fuel tank 68
Fuel overflowing from the fall is prevented in drainage rib 68 _5, an arrow of the water droplets and fuel beyond the edge 45 _2, 46 ₂ is prevented from flowing into the engine cover 1 (FIG. 11 A).

Next, the structure of the air cleaner 67 will be described. As shown in FIG. 6 and FIG.
Is composed of an air cleaner case 86, an air cleaner element 87, and an air cleaner cover 88. The air cleaner case 86 having a cup shape with a circular cross section is
The left cover 45 protrudes integrally from the rear side surface toward the inside. The opening of the air cleaner case 86 is the left cover 45.
Is covered by a removable air cleaner cover 88 from the outside, and a dirty chamber 89 is formed outside the air cleaner element 87 housed inside the air cleaner case 86, and a clean chamber 90 is formed inside the air cleaner element 87. Is formed.

A boss 91 for supporting the fuel cock 82 protrudes from the inner surface of the left cover 45. An upper partition rib 92 is formed between the air cleaner case 86 and the upper inner surface of the left cover 45, and a lower partition rib 93 is formed between the air cleaner case 86 and the boss 91. The air cleaner case 86 has a pair of intake holes 8 communicating with the dirty chamber 89 so as to be located in front of the upper partition rib 92 and the lower partition rib 93.
6 ₁ and 86 ₁ are formed, and the clean chamber 90 is connected to the carburetor 18.

The air sucked from the cooling air inlets 69, 69 by the negative pressure generated by the cooling fan 27 is
The intake holes 86 ₁ , 86 ₁ of the air cleaner case 86 are blocked by the upper partition rib 92 and the lower partition rib 93.
And flows around the right side of the cover 46 to the front of the upper partition ribs 92 and the lower partition ribs 93, and then flows backward into the dirty chamber 89 from the intake holes 86 ₁ , 86 _1. . As described above, while the air supplied to the air cleaner 67 is diverted, dust contained in the air is dropped to supply clean air, thereby preventing the air cleaner element 87 from being clogged. Then, the air flowing into the dirty chamber 89 passes through the air cleaner element 87 to completely remove dust, and then passes through the clean chamber 90 to the carburetor 1.
8 is supplied.

Even if water enters the engine cover 1 from around the fuel tank 68, the water is blocked by the upper partition rib 92 and the lower partition rib 93 provided on the left cover 45. As a result, the air does not flow into the intake holes 86 ₁ , 86 ₁ of the air cleaner case 86, thereby preventing water from adhering to the air cleaner element 87 and causing clogging.

As described above, since the air cleaner case 86 is formed integrally with the left cover 45, the number of parts such as mounting brackets and bolts can be reduced, and the cost can be reduced. Further, by removing the air cleaner cover 88, the air cleaner element 87 can be easily replaced from the outside of the left cover 45, so that workability is greatly improved. Further, since the left cover 45 supports the air cleaner 67 and the fuel cock 82 and the right cover 46 does not support any accessories, the right cover 46 can be easily removed to easily perform maintenance of the engine E. .

Although the embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various design changes can be made.

[0035]

As described above, according to the first aspect of the present invention, the power take-off shaft connected to the working unit is connected to the engine main body.
Engine for work equipment protruding downward from the body
And an engine main body and various auxiliary machines attached to the main body.
(Muffler, carburetor, air cleaner, fuel cock)
And by that totally covered with an engine cover which is bisected right and left, mud and dust on their engine body and auxiliary machine
Kalika if possible to avoid adhering, operating noise of the engine
Work can be reduced as much as possible by the engine cover
The noise of the machine can be reduced, and the number of parts of the engine cover can be minimized to improve the assembling property and the maintenance property. In addition, by arranging the axis of the cylinder barrel in the front and rear direction inside the engine cover, the engine cover is formed narrow and the appearance is smart, and the handleability on cultivated land where the height of the engine part is small is improved. be able to. Further, by providing the cooling air supply port and the cooling air discharge port on the engine cover, the engine can be cooled without any trouble.

An air cleaner is provided on one of the right and left covers.
And the fuel cock are each independent of the other cover
So that one cover can be attached to the other
Easily disconnects without regard to the air cleaner or fuel cock.
It is possible to maintain the engine and auxiliary equipment
Nonce can be easily performed.

Further, the cooling air inlet is provided on the left cover and the right cover.
Formed between the mating surfaces at the rear end of the
Special machining or hole machining after forming.
Easy and low-cost formation of cooling air suction port
be able to.

Further, the air cleaner case of the air cleaner
Is formed integrally with the left or right cover,
Engine body or engine with separate lina case
Simpler mounting structure compared to retrofitting to the cover
And the number of parts can be reduced, resulting in cost
It can contribute to savings.

[Brief description of the drawings]

Fig. 1 Side view of the entire cultivator

FIG. 2 is a view in the direction of arrows in FIG. 1;

FIG. 3 is a view taken in the direction of arrows 3-3 in FIG. 1;

FIG. 4 is an enlarged view in the direction of arrows in FIG. 1;

FIG. 5 is an enlarged view of a main part of FIG. 2;

FIG. 6 is an enlarged sectional view of a main part of FIG. 1;

FIG. 7 is a sectional view taken along line 7-7 of FIG. 6;

8 is a sectional view taken along line 8-8 in FIG. 6;

9 is a sectional view taken along line 9-9 in FIG. 6;

FIG. 10 is a sectional view taken along line 10-10 of FIG. 6;

FIG. 11 is a sectional view taken along line 11-11 of FIG. 6;

FIG. 12 is a sectional view taken along line 12-12 of FIG. 6;

FIG. 13 is a sectional view taken along line 13-13 of FIG. 6;

FIG. 14 is an explanatory diagram of an operation.

[Explanation of symbols]

1 engine cover 16 cylinder barrel 17 engine body 18 Kyabure motor 37 power take-off shaft 45 left cover 46 right cover 65 muffler 67 Eakuri burner 69 cooling air inlet 71 cooling air discharge port 82 the fuel cock 86 air cleaner case 87 air cleaner element 88 the air cleaner cover R Tilling part (working part) T Tiller (working machine)

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ identification code FI F02B 67/00 F02B 67/00 R (58) Fields investigated (Int.Cl. ⁶ , DB name) F02B 77/13 A01B 33 / 02 F01P 1/06 F02B 65/00 F02B 67/00

Claims (1)

(57) [Claims] A power take-off shaft (3) connected to a working section (R).
(7) An engine body (17) in which an axis of a cylinder barrel (16) is disposed in a front-rear direction, which is a traveling direction of the work machine (T), in a working machine engine in which the working body (7) is projected downward from the engine body (17). When,
A muffler (6 ) attached to the engine body (17)
5), carburetor (18) and air cleaner (67)
Has a cooling air inlet (69) and a cooling air outlet (71).
Engine cover (1)
The engine cover (1) is detachably connected to the left
Split right and left from cover (45) and right cover (46)
And one of the left and right covers (45) is
Connected to the cleaner (67) and the carburetor (18)
A fuel cock (82) for opening and closing the fuel supply passage is provided.
And is attached independently of the other cover (46).
Cooling air inlet (69) is left cover (45) and right cover
(46) formed between the mating surfaces at the rear end,
Lina (67) is attached to one of the left and right covers (45).
An air cleaner case (86) formed on the body and this air cleaner case (86)
Air cleaner housed in cleaner case (86)
Element (87) and air cleaner case (86)
To the left or right cover (45) so as to cover the opening of
A removable air cleaner cover (88) is provided.
Engine cover structure in engine, wherein the working machine be obtained.