JP2003267272A - Driving part structure for working machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To open an engine hood as quiet as possible in opening the same that swings downward around an axis in a longitudinal direction of a machine body. <P>SOLUTION: The engine hood 9 is provided with an engine hood body 9a and a side wall 30 connecting to one end side of the engine hood body 9a. The side wall 30 is made of resin and formed in a hollow structure. A projection part 69 is formed on a lower end part of the side wall 30 as one body. The projection part 69 gets into contact with a stopper to establish a lowering limit of the engine hood 9 when the engine hood 9 is opened. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine bonnet including a bonnet body and a resin-made hollow side wall connected to an outer lateral end of the bonnet body. Attached vertically swingably to the open position, which is located at the lower end of the lateral outside end of the bonnet, which swings down to the lateral outside of the fuselage around the longitudinal axis of the aircraft, and the closed position where it is swung upward toward the inside of the fuselage. Related to the structure of the driving part of the working machine.

[0002]

2. Description of the Related Art When the engine bonnet is swung from the closed position to the open position, the motive part of the working machine swings the bonnet body and the side wall of the engine bonnet laterally outward to open the periphery of the engine. It was made possible. Further, even when the lateral side wall has a complicated structure having an intake port and the like, the hollow structure made of resin is advantageous in strength and weight. In this type of driving part, a support rod whose base end side is rotatably connected to the body side, and a connection rod which is configured to slidably enter into an elongated hole of the support rod and is attached to an engine bonnet When the engine bonnet is opened by providing a descending stop mechanism such as consisting of pins,
Although the engine bonnet is configured to stop and be supported at the set descending position by the stopper action of the descending stop mechanism, conventionally, the following problems may occur.

[0003]

When opening the engine bonnet, when the engine bonnet is vigorously lowered due to a hand coming off the engine bonnet, a sudden opening operation, etc. It was easy to make a noise near the rocking fulcrum and make a noise, or the side wall was made of resin and was deformed.

An object of the present invention is to easily avoid the above-mentioned trouble even if the engine bonnet is opened by impact.
Moreover, it is an object of the present invention to provide a prime mover structure of a working machine that can be easily obtained.

[0005]

The constitution, action and effect of the invention according to claim 1 are as follows.

[Structure] The engine bonnet is composed of a bonnet body and a lateral side wall of a hollow structure made of resin, which is connected to the lateral outer side end of the bonnet body, and the lateral side outer end of the engine bonnet is formed. At the lower end of the machine, the prime mover of the work machine that is vertically swingably mounted to the open position that swings down to the lateral outside of the machine around the longitudinal axis of the machine and the closed position that swings upward to the inside of the machine. In the partial structure, a protrusion is integrally formed on the lower end of the lateral side wall, and when the engine bonnet is opened and operated, the protrusion contacts the stopper to set the lower limit of the engine bonnet. I am doing it.

[Operation] When the engine bonnet is opened to the lower limit, the protrusion of the side wall abuts the stopper. This protrusion is made of resin and is integrally molded on the side wall even if it strikes the stopper shockfully,
Since it has a structure protruding from the side wall, it is easily elastically deformed to effectively absorb the impact.

[Effect] Therefore, even if the engine bonnet is opened by impact, noise and deformation are less likely to occur due to effective impact relaxation by the protrusions, and it is possible to open quietly and have high durability. Moreover, a simple structure in which the protrusion is integrally formed on the lateral side wall is sufficient, and the cost can be obtained at a low cost.

The structure, operation and effect of the invention according to claim 2 are as follows.

[Structure] In the structure of the present invention according to claim 1, the protrusion is a protrusion extending along the front-rear direction of the lateral side wall.

[Operation] Since the protrusion is a ridge extending in the front-rear direction of the side wall, even if there is some molding distortion or assembling error in the side wall, the protrusion can be reliably attached to the stopper. In addition, the contact is abutted in a wide range as much as possible, and the impact is alleviated more reliably and effectively.

[Effect] Therefore, the impact can be alleviated more reliably and effectively by the projections, and the noise and deformation can be released while being less likely to occur.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 and 2, a crawler type traveling device 1, a riding type driving section 2 having a driving seat 2a, and a driving section 3 located below the driving seat 2a are provided. To the front end side of the body frame 4 of the self-propelled aircraft, a mowing unit 5 for mowing the planted grain culm is connected in a vertically movable manner, and a threshing device 6 for threshing the mowing grain culm from the mowing unit 5 and , The grain tank 7 for storing grains from the threshing device 6 is arranged on the machine body frame 4 so as to be aligned in the lateral direction of the self-propelled machine body in a state where the grain tank 7 is located on the rear side of the driving part. A combine harvester is provided to harvest rice and wheat.

As shown in FIGS. 1 and 5, the engine 8 mounted on the drive unit 3 in a posture in which the output shaft is oriented laterally of the self-propelled vehicle, also serves as a seat support base for supporting the driver's seat 2a. The engine bonnet 9 is provided.

As shown in FIGS. 3, 4, and 5, the engine hood 9 includes a front wall 10, a rear wall 20, and a rear wall 2.
0 and the front wall 10 are connected to each other from the upper end sides thereof, and the ceiling wall 22 configured to support the driver's seat 2a on the upper surface side, the ceiling wall 22, the front wall 1
0, a bonnet body 9a that is formed by each of the lateral side plates 40 that are connected across the ends of the rear wall 20 on the lateral outer side of the fuselage and that are provided with the cooling air supply port 46,
The bonnet body 9a is constituted by a lateral side wall 30 whose inner surface side is connected to the laterally outward side end of the machine body.

As shown in FIG. 4, the front wall 10 includes an outer wall plate 13 made of sheet metal and an inner wall plate 14 made of sheet metal, each wall plate 13 having an intake port 12 with a dust removal net 11. , 14
The front wall ventilation passages 15 are formed between them to form a hollow structure wall.

As shown in FIGS. 3 and 5, the lateral side wall 30 has a plurality of intake ports 31 arranged in the vertical direction of the lateral side wall 30, and a front downward slope on the front end side of the upper frame portion 32. To have a through hole 33 that allows the part 32a of the above to be used as a fixed handle, and
It is located between the intake ports 31 and the through holes 33.
So that each of the partition frame portions 34, 35 positioned between and, and the front frame portion 36, the rear frame portion 37, the upper frame portion 32, and the lower frame portion 38 become a hollow frame portion. It is manufactured by blow molding a resin material, and is connected to the lateral end portion of the bonnet body 9a on the inner surface side of the portion where the lower two intake ports 31 are attached. Then, the intake adjustment plate 41, which is arranged so as to be located inside the lower two intake ports 31 of the side wall 30, and is attached inside the side wall 30.
And the lateral side plate 40 of the bonnet body 9a form a lateral wall ventilation path 42 between them, and the front wall ventilation path 15 and the lateral wall ventilation path 42 are formed in the front portion of the lateral side plate 40.
A front opening 43 is provided which communicates with the. The intake adjustment plate 41 has a large number of through holes, and the engine cooling radiator 45 can be operated by the arrangement and size of the through holes.
The intake pressure exerted by the cooling fan 47 located between the engine 8 and the engine 8 is taken into account not only by the lower two intake ports 31 of the side wall 30 but also by the intake port 31 on the upper side of the side wall 30. Adjust to reach mouth 12. The lower side 2 of the side wall 30
A dust remover 48 made of sheet metal having a large number of through holes for ventilation is attached to each of the outer surface side of the one intake port 31 and the outer surface side and the inner surface side of the upper intake port 31.

A connecting portion 39 as shown in FIG. 7 provided inside the lower end portion of the front frame portion 36 of the lateral side wall 30 and the lateral side wall 3
8 and a connecting portion 39 provided inside the lower end portion of the rear frame portion 37 as shown in FIG. 8 are rotatably connected by a connecting pin 52 to a supporting plate 51 fixed to the outer surface side of the bonnet supporting frame 50. I am doing it. As shown in FIG. 1, the base end side of the bonnet support frame 50 is rotatably connected to the body frame 4 near the lower side of the front end side of the floor plate 2b of the operating unit 2 about a vertical axis Y of the body. The bonnet support frame 50 is supported so as to swing in the front-rear direction of the self-propelled airframe around the turning axis Y with respect to the airframe frame 4.

As a result, the engine bonnet 9 swings up and down with respect to the bonnet support frame 50 around the swing axis P which is the axis of the connecting pin 52, and with respect to the machine frame 4. Is supported so as to pivot in the longitudinal direction of the machine body about the pivot axis Y, and the bonnet support frame 50 is mounted in the housing portion 4a of the machine body frame 4 as shown in FIG. The swing axis P becomes an axis along the front-rear direction of the self-propelled aircraft, and the engine bonnet 9 rises and swings around the swing axis P in the front-rear direction of the vehicle as shown in FIG. 11 and the closed position between the floor plate 2b and the grain tank 7 and the horizontal position between the floor plate 2b and the grain tank 7 by descending and swinging around the swing axis P as shown in FIG. The first open position on the outside It switched to the door. Then, when the bonnet support frame 50 swings around the turning axis Y, the engine bonnet 9 turns around the turning axis Y in the front-rear direction of the self-propelled vehicle, and as shown in FIG. It switches between the closed position that has entered between the floor plate 2a and the grain tank 7 and the second open position that has emerged laterally outside on the front end side of the operating unit 2 as shown in FIG.

As shown in FIG. 12 and the like, a lock pin 56 supported by a bracket 55 fixed to the front end side of the bonnet support frame 50 and the body frame 4
With a lock arm 59 that is rotatably connected to the bracket 57 fixed to the base end side by a connecting pin 58,
A turning lock mechanism 60 of the engine hood 9 is configured. That is, as shown in FIG. 12 and the like, the bonnet support frame 50 is placed in the storage portion 4a of the machine body frame 4, and the lock arm 59 is rocked downward about the axis of the connecting pin 58. Then, when the base end side of the lock arm 59 contacts the stopper pin 61 attached to the bracket 57 to the lock position, the hook portion 59 a of the lock arm 59 engages with the lock pin 56. Then, the swing lock mechanism 60 locks the bonnet support frame 50 in the stored state so as not to come out of the body from now on, and locks the engine bonnet 9 in the closed position. In this state, the lock arm 59 is swung upward around the axis of the connecting pin 58 so that the hook portion 59a is locked.
When removed from 6, the turning lock mechanism 60 is unlocked so that the bonnet support arm 50 is unlocked and the turning operation of the engine bonnet 9 is enabled.

As shown in FIG. 15 and the like, a support rod 67 whose base end side is rotatably connected by a connecting pin 66 to a bracket 65 fixed to the free end side of the bonnet support frame 50, and this support rod 67. The connecting pin 68 fixed to the inner surface side of the rear wall 20 of the engine bonnet 9 so as to slidably enter into the long hole 67a provided on the side wall 30 as shown in FIGS. At the time of molding, as an example of the lower end portion of the lateral side wall 30, a protrusion 69 formed by a protrusion along the longitudinal direction of the lateral side wall integrally formed on the lower end surface 38a of the lower frame portion 38, and a bonnet support frame as shown in FIG. A stopper 70, which is a part of 50, constitutes a lowering stop mechanism 71 of the engine bonnet 9. That is, when the engine bonnet 9 is swung up and down about the swing axis P, the connecting pin 68 moves together with the engine bonnet 9 around the swing axis P and moves inside the elongated hole 67 a of the support rod 67. Meanwhile, the supporting rod 67 is rocked around the axis of the connecting pin 66. As the engine hood 9 swings downward, as shown in FIG. 13, the connecting pin 68 is supported by the supporting rod 67 so as not to move further at the end of the elongated hole 67a. At this time, as shown in FIG.
Comes into contact with the stopper 70.

As a result, when the engine bonnet 9 descends and swings around the swing axis P, the descending stop mechanism 71 supports the connecting pin 68 by the supporting rod 67 and the stopper 70 of the protrusion 69. The lower limit of the engine bonnet 9 is set according to the hit against, and the engine bonnet 9 is supported at this lower limit to stop the engine bonnet 9 so as to maintain the first open position.

That is, at normal times such as during work, the engine bonnet 9 is brought to the closed position where it is inserted between the floor plate 2b of the operating section and the grain tank 7, and the swing lock mechanism 60 locks the engine bonnet 9 at the closed position. deep. Then, as shown in FIGS. 4 and 5, the engine hood 9
The bonnet body 9a and the side wall 30 cover the front, upper, rear, and lateral outer sides of the engine 8 respectively. At this time, the cooling fan 47 is driven to rotate by the engine 8 and exerts a suction effect,
Air outside the engine bonnet is sucked as cooling air into the lateral wall ventilation passage 42 from the two lower inlets 31 of the lateral side wall 30 through the through holes of the air intake adjusting plate 41, and from the cooling air supply port 46 of the lateral side plate 40 to the engine cooling radiator. 45. At the same time, the air outside the engine hood is sucked into the front wall ventilation passage 15 from the intake port 12 of the front wall 10 as cooling air, and from the front wall ventilation passage 15 to the horizontal wall ventilation passage 42 through the front opening 43 of the lateral side plate 40. The air is sucked, merges with the cooling air from the two lower inlets 31 of the side wall 30, and is supplied from the cooling air supply port 46 to the engine cooling radiator 45. Further, the air outside the engine bonnet is sucked as cooling air between the dust removers 48 of the intake ports 31 from the intake ports 31 on the outer and inner surfaces of the upper side wall 30, and from this portion, the horizontal wall ventilation passage 42 is formed. Is sucked into
The cooling air from the two lower inlets 31 of the side wall 30 and the inlet 12 of the front wall 10 is merged and supplied to the engine cooling radiator 45 from the cooling air supply port 46.

When the engine 8 is inspected, for example, to control the prime mover, as shown in FIG. 15, the swing lock mechanism 60 is kept in the locked state, and the engine bonnet 9 is moved from the normal state to the swing shaft center P around the swing axis P. The lowering stop mechanism 7
Rock down until 1 stops. Then, the engine bonnet 9 is switched to the first open position to open the periphery of the engine 8, and it becomes easy to perform work such as inspection and repair. At this time, even if the engine bonnet 9 suddenly descends, the protrusion 69 of the lateral side wall 30 will not be able to move to the stopper 7.
The engine bonnet 9 is positioned at the first open position while the stopping impact is mitigated by the elastic deformation caused by the collision with 0. Further, if necessary, the engine bonnet 9 is moved to the front side of the self-propelled vehicle around the turning axis Y from the closed position with the turning lock by the turning lock mechanism 60 released. Then, the engine bonnet 9 is switched to the second open position to open the periphery of the engine 8 to a greater extent, and it becomes easier to carry out work such as inspection and repair, and loading and unloading of the engine 8.

As shown in FIGS. 3 and 6, among the partition frame portions 34 and 35 of the lateral side wall 30, between the lowest intake port 31 and the intake port 31 adjacent thereto. The partition frame portion 34 located is located at a lower level toward the front end side in a side view of the machine body, the front end side is continuous to the front end side of the lower frame portion 38, and the rear end side extends to the upper end side of the rear frame portion 37. It is formed in a shape that is curved so as to be continuous with the upper end side of the rear frame portion 37 and that protrudes more laterally outward than the rear frame portion 37 and the lower frame portion 38.

As shown in FIG. 2, the grain tank 7 includes a vertical screw shaft X of a vertical screw connected to the rear end side.
It is mounted so that it can be swung around the outside of the machine. Therefore, as shown in FIG. 17, between the front wall plate 7a of the grain tank 7 and the engine hood 9,
There is a relatively large gap that allows the grain tank 7 to swivel. As shown in FIG. 17 and the like, at the front end side of the plate body 7b forming the fuselage lateral outer wall of the grain tank 7, the front side of the grain tank 7 is projected from the front wall plate 7a of the grain tank 7 and the projecting side. The edge of the partition frame portion 34 of the lateral side wall 30.
A portion 7c that is close to the rear side of the upper end side portion and closes the gap between the tank front wall plate 7a and the engine bonnet 9 is provided.

A chamfered portion 37a as shown in FIG. 6 is provided at the lower end portion of the rear frame portion 37 of the lateral side wall 30. Figure 1
As shown in FIG. 5, the bottom cover 75 detachably attached to the grain tank 8 so that the bottom screw of the grain tank 8 is located inside the bottom side of the fuselage which is located inside is attached to the chamfered portion 37a. It is located at the corresponding placement level. That is, as shown in FIGS. 18 and 19, a guide member provided inside the grain tank 8 configured to cover the upper portion of the bottom screw of the grain tank 8 and guide the grain downwardly to the bottom screw. A vibrator lever 76 for vibrating is provided on the front side of the grain tank 8. The vibrator lever 76 is operated by removing the bottom cover 75. At this time, the chamfered portion 37a facilitates lever operation between the grain tank 8 and the rear frame portion 37 of the engine bonnet 9. It is easy to secure.

[Other Embodiments] As the protrusion 69,
When the protrusions are used, the protrusions may have a shape in which the protruding height is lower at both ends in the longitudinal direction of the side wall than at the center side.

The present invention can be applied not only to combine harvesters, but also to a driving part equipped in a harvester for harvesting various crops such as carrots and onions. Therefore, the combine and various harvesters are collectively referred to as a working machine.

[Brief description of drawings]

1] Side view of the whole combine

FIG. 2 is a plan view of the whole combine.

FIG. 3 is a perspective view of the entire engine bonnet

FIG. 4 is a cross-sectional plan view of the engine bonnet.

FIG. 5 is a vertical sectional front view of the engine bonnet.

FIG. 6 is an external view of the side wall.

FIG. 7 is a cross-sectional view showing a connecting portion on the front side of the side wall.

FIG. 8 is a cross-sectional view showing a connecting portion on the rear side of the side wall.

FIG. 9 is a rear view of the prime mover with the engine bonnet closed.

FIG. 10 is an explanatory view showing a closed position of the engine bonnet.

FIG. 11 is an explanatory view showing a first open position of the engine bonnet.

FIG. 12 is a rear view of the lowering stop mechanism.

FIG. 13 is an explanatory view showing the stopper action of the descending stop mechanism.

FIG. 14 is an explanatory view showing an unlocked state of the swing lock mechanism.

15 (a) and 15 (b) are explanatory views showing the operation of the descending stop mechanism, in which (a) is an explanatory view when the engine bonnet is closed and (b) is an explanatory view when the engine bonnet is open.

FIG. 16 is an explanatory view showing a second open position of the engine bonnet.

FIG. 17 is an explanatory view showing a front end side portion of a lateral outer wall of the grain tank.

FIG. 18 is an explanatory diagram of a vibrator lever.

FIG. 19 is an explanatory view showing a chamfered portion of a side wall.

[Explanation of symbols]

9 engine bonnet 9a Bonnet body 30 side wall 69 Projection 70 Stopper P shaft core

Claims (2)

[Claims] 1. An engine bonnet comprising: a bonnet body; and a lateral wall of a hollow structure made of resin, which is connected to an outer lateral end of the bonnet body, and an outer lateral end of the engine bonnet. Of the working machine that is swingably mounted at an open position that is oscillated downward to the lateral side of the machine body around a shaft center in the longitudinal direction of the machine body that is located at the lower end of the machine body, and a closed position that is oscillated upward to the inside of the machine body. In the driving part structure, a protrusion is integrally formed on the lower end of the side wall, and when the engine bonnet is opened and operated, the protrusion contacts the stopper to set the lower limit of the engine bonnet. The structure of the prime mover of the working machine configured as follows. 2. The prime mover structure for a working machine according to claim 1, wherein the protrusion is a ridge extending in the front-rear direction of the lateral side wall.