JP2003137134A - Attaching and detaching structure for hood - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an attaching and detaching structure for hood capable of removably attaching the hood to a machine side easily and fixing it to the machine side securely in an agricultural machine in which an engine is covered with the hood. SOLUTION: The hood 60 is constituted of a hood front constituent body 62 and a hood rear constituent body 68. An anchoring member 62a disposed on the front side of the hood front constituent body 62 is engaged with an anchoring part 74 disposed on the machine side. An elastic body anchoring member 82 disposed on the rear side of the hood front constituent body 62 is engaged with an elastic body mounting member 80 disposed on the machine side, energizing the hood front constituent body 62 rearward. In the same way, an anchoring member 68a disposed on the rear part of the hood rear constituent body 68 is engaged with an anchoring part 63a disposed on a front step 63 and the hood rear constituent body 68 is energized forward by an elastic body 97 installed in the hood rear constituent body 68 and the machine side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bonnet attachment / detachment structure for agricultural work machines.

[0002]

2. Description of the Related Art A conventional agricultural working machine has a working machine which can be raised and lowered at the rear of a traveling machine body which is configured to be self-propelled, and the traveling machine body has a prime mover section provided on an upper front side of a machine body frame. However, the driving operation section is disposed behind the prime mover section.

A steering shaft is rotatably disposed at a predetermined position in front of the seat in the driving operation unit, and a steering wheel is attached to a tip end portion of the steering shaft. The steering shaft is a bonnet. It was covered with the after-construction.

The prime mover section mounts an engine on the upper front side of the machine frame, arranges a fuel tank above the engine, and covers the front and left and right sides of the engine and the fuel tank with a front bonnet structure. The rear of the engine and the fuel tank was covered with the bonnet rear structure.

Then, a step is mounted on the front upper part of the machine body frame, and the front end of the bonnet front structure is locked to the front end of the step, while the front end of the bonnet structure is fixed to the left and right side parts of the bonnet rear structure. By fixing the left and right parts with knob screws, the front bonnet structure and the rear bonnet structure were attached to the aircraft.

[0006]

However, in the above-mentioned conventional agricultural working machine, since the left and right side portions of the front bonnet structure are fixed to the left and right side portions of the rear bonnet structure by the knob screws, a fixing tool is used. A certain knob screw is exposed on the exterior surface and is caught by the operator's body when getting on and off from the front of the machine, causing the knob screw to loosen, causing backlash in the bonnet front structure and the bonnet rear structure, and damaging the knob screw. When removing the front bonnet structure or the rear bonnet structure for maintenance of the engine or the like, it is necessary to remove both left and right knob screws, which may complicate the maintenance work. There was

Further, in the case where the front bonnet structure is fixed to the rear bonnet structure by using the lock cam mechanism, an operation lever for performing a lock operation and a lock release operation of the lock cam mechanism is provided in the driving operation section. It is provided, and it is necessary to have a complicated structure to prevent the bonnet from accidentally falling off when the operator's body accidentally comes into contact with the operating lever. When removing the bonnet for maintenance, the operation lever has to be purposefully operated by the operation operating unit, which may result in complicated maintenance work.

[0008]

The problem to be solved by the present invention is as described above, and the means for solving this problem will be described below.

That is, according to the first aspect of the present invention, in the agricultural working machine in which the bonnet is composed of the front bonnet structure and the rear bonnet structure, a locking member is provided on one front or rear side of either the front bonnet structure or the rear bonnet structure. Is provided to engage with the locking portion provided on the machine side, and elastic body locking members are provided on the other front and rear sides to lock with the elastic body provided on the machine side, and one constituent member of the other side It is biased and supported in the direction of the structure.

According to a second aspect of the present invention, in an agricultural working machine in which a bonnet is composed of a bonnet front structure and a bonnet rear structure, a locking member is provided on one of the front and rear sides of either the bonnet front structure or the bonnet rear structure. To engage with the locking part provided on the machine side, and to provide elastic body locking members inside the front and rear bonnets to lock with the elastic body provided on the machine side and It is biased and supported in the direction of the structure.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the invention will be described with reference to the following drawings. 1 is a left side view showing a rice transplanter according to an embodiment of the present invention, FIG. 2 is a plan view showing a body frame, and FIG. 3 is a left side view of the same. 4 is a left side view showing a prime mover portion, FIG. 5 is a perspective view showing a steering shaft support frame structure, FIG. 6 is a plan view thereof, and FIG. 7 is a side view of a fan case of an engine. FIG. 8 is a left side view showing the front bonnet structure and the rear bonnet structure.
Is a front view of the front bonnet structure without the filler cap, FIG.
0 is a left sectional side view showing the rear upper part of the front bonnet structure and the rear bonnet structure, and FIG. 11 is a view showing the elastic body. FIG. 12 is a left side view showing the steering mechanism, and FIG.
14 is a view showing another example of mounting a fuse box, FIG. 14 is a view showing a switch box and its mounting panel, FIG. 15 is a side sectional view showing a torque generator and a steering case, FIG. 16 is a front view showing the torque generator, and FIG.
FIG. 6 is a partial cross-sectional view showing the attachment of the switch box.

Embodiments of the present invention will be specifically described below with reference to the drawings. In the present embodiment, the riding rice transplanter 1 is described as an example of the agricultural work machine according to the present invention. However, the agricultural work machine according to the present invention is not limited to the rice transplanter 1, and a tractor, a combine harvester, and a vegetable transplanter can be used. It can also be applied to various working machines such as machines.

As shown in FIG. 1, a rice transplanter 1 according to this embodiment.
Has a planting device 3 as a working machine connected to the rear part of the traveling machine body 2 configured to be self-propelled so as to be able to move up and down through an elevating mechanism 4, and the traveling machine body 2 extends in the front-rear direction. The traveling section 6 is arranged below the machine body frame 5, the prime mover section 7 is arranged on the upper front side of the machine body frame 5, and the driving operation section 8 is arranged behind the prime mover section 7.

The driving operation section 8 is constructed by rotatably disposing a steering shaft 27 in front of the seat 83 at a predetermined interval, and attaching a steering wheel 104 to the tip of the steering shaft 27. Further, the prime mover unit 7 mounts the engine 16 on the upper front end of the machine body frame 5, and places the fuel tank 40 at a position immediately above the engine 16.
(FIG. 4) is arranged.

A front step 63, which is substantially U-shaped in a plan view, is mounted on the upper front end of the machine body frame 5 with its bifurcated distal end extending toward the left and right sides of the engine 16. A front cover 65 is openably and closably disposed between the bifurcated front end portions of the front step 63, and a bonnet front structure 62 and a bonnet rear structure 68 are arranged on the front step 63 and the front cover 65 in order from the front side.
And the front and left and right sides of the engine 16 and the fuel tank 40 are covered by a bonnet 60 composed of the bonnet front constituent body 62 and the bonnet rear constituent body 68, and the bonnet rear constituent body 68. The engine 16 and the rear of the fuel tank 40 are covered by.

The structures of the machine body frame 5, the traveling section 6, the prime mover section 7 and the driving operation section 8 constituting the agricultural working machine will be described in detail below.

[Airframe Frame] First, the structure of the airframe frame 5 will be described. As shown in FIG. 1 to FIG. 3, a pair of left and right center frame constituent members 9.1 are extended in the front-rear direction and bent rearward upward from a substantially central portion.
A substantially U-shaped cylindrical front frame structure in which the central portion is extended in the left-right width direction between the front end portions of 0, and the left-right side portions are bent so that the left-right side portions are extended rearward. 11 is installed, and a hollow rectangular-shaped preliminary seedling stand support frame structure 12 extending in the left-right width direction is installed between the front middle portions of the center frame structures 9 and 10, and the center frame structure is also installed. Between the middle portions of 9 and 10, a cylindrical step support frame structure 13 extending in the left-right width direction, and a base end portion of a substantially gate-shaped cylindrical seat support frame structure 14 in a front view are provided. And the upper portion of a rear rectangular frame-shaped rear frame structure 15 having a substantially gate shape in a rear view between the rear ends of the center frame structure bodies 9 and 10 to construct the machine body frame 5. There is.

The machine frame 5 has a rectangular flat plate-shaped engine support 17 for mounting the engine 16 between the center of the front frame structure 11 and the center of the preliminary seedling stand support frame structure 12. Is extended in the front-back direction, and a rectangular flat plate-shaped steering support 19 for supporting the steering mechanism 18 is provided at the rear end of the engine support 17.

Further, in the machine body frame 5, the base end portions of the spare seedling stand support columns 21 forming the spare seedling stand 20 are attached to the left and right ends of the spare seedling stand support frame structure 12 via brackets 22, respectively. The left and right ends of the front frame structure 11 are connected to the left and right ends of the preliminary seedling table support frame structure 12, and the preliminary seedling table support frame structure 1 is formed.
2 and the right side of the front frame structure 11 between the battery 2
A rectangular flat plate-shaped battery support 24 on which to mount 3
And the center frame structure 9/10
A pair of left and right step support columns 51 and 52 are erected upward in the vicinity of the intersection between the auxiliary seedling table support frame structure 12 and.

As shown in FIGS. 4 to 6, the body frame 5 has a pair of left and right steering shaft support frame components 25 and 26 in the center of the front frame component 11.
The front end of the steering shaft is attached to the rear ends of both the steering shaft support frame components 25 and 26, and a cylindrical steering post 28 that rotatably supports the steering shaft 27 is provided via a substantially U-shaped plate 29 and a bracket 29a. Installed.

Further, the machine body frame 5 is shown in FIGS.
As shown in FIG. 2, a pair of left and right cylindrical step support frame structures 30 are provided on the left and right side portions of the gate-shaped rear frame structure 15.
The corner portions of the rear frame structure 15 and the step support frame structure 30 are attached while the base end portions of 31 are attached.
.Rear deck support bracket 32 between the base end of 31
・ 33 is attached. Each of the step support frame constructing bodies 30 and 31 is in a state in which the base end portion is extended in the left-right width direction and is bent in the middle portion so that the tip end portion is extended in the front-rear direction.

[Running Section] Next, the running section 6 will be described. As shown in FIGS. 1 to 3, the traveling unit 6 fixes the front portion of the mission case 34 to the rear portion of the steering support 19 provided on the machine body frame 5, and
Front pair of left and right front axle cases 35 and 36
, And front wheels 37, 37 are interlockingly connected to the front axle cases 35, 36.

The running portion 6 is integrally formed with a rear axle case 38 extending in the left-right width direction at the rear portion of the transmission case 34, and rear wheels 39, 39 are provided at the left and right ends of the rear axle case 38, respectively. It is linked and linked.
The left and right upper portions of the rear axle case 38 are attached to the base end portion of the rear frame constituting body 15 of the machine body frame 5.

[Motor Section] Next, the structure of the motor section 7 will be described. As shown in FIGS. 1 to 4, the prime mover unit 7 includes an engine 1 on the engine support 17 of the machine frame 5.
6 is mounted, the fuel tank 40 is arranged above the engine 16, and a muffler 59 is provided on the left side of the engine 16.
And the engine 16, the fuel tank 40, the muffler 59, and the like are covered with a bonnet 60. In addition,
The bonnet 60 is composed of a hood front structure 62 and a hood rear structure 68.

The prime mover section 7 has a drive shaft 41 protruding from the rear left side of the engine 16 and a belt type continuously variable transmission device 45 forming a part of the traveling power transmission mechanism 43 at the tip of the drive shaft 41. And a hydraulic pump 46 for hydraulically driving the planting device 3 and the like coaxially attached to the left side portion of the transmission 45, and the drive shaft 41 of the engine 16 is also connected to the hydraulic pump 46. ing. In the traveling power transmission mechanism 43, the output side pulley 47 of the transmission 45 is attached to the drive shaft 41 of the engine 16, while the input side pulley 49 is attached to the input shaft 48 projecting to the front left side portion of the transmission case 34. The transmission belt 50 is wound between the side pulley 47 and the input side pulley 49, and after the power of the engine 16 is changed by the transmission 45, the transmission case 34 and the front axle cases 35 and 36 and the rear axle case 38 are inserted. Front and rear wheels 37 ・ 37 ・
It is transmitted to 39.39.

Further, the prime mover section 7 has a drive shaft 42 projecting from the front right side of the engine 16, and an output side pulley 53 is attached to the tip end of the drive shaft 42, while a center frame structure on the right side of the machine body frame 5 is formed. Generator support column 54 standing on the front side of the body 9 and 10 and step support column 52 on the right side
A generator 55 is attached between the input side pulley 57 and the input shaft 56 of the generator 55, and a transmission belt 58 is wound between the output side pulley 53 and the input side pulley 57.

In this way, the drive shafts 41 and 42 are respectively projected to the left and right sides of the engine 16 and the engine 16
While the traveling power transmission mechanism 43 is arranged on the left side of the engine 16, the power generation mechanism 44 is arranged on the right side of the engine 16.
6 to the drive shaft 41 projecting to the left of the traveling power transmission mechanism 4
3 is interlockingly connected, and the power generation mechanism 44 is interlockingly connected to the drive shaft 42 projecting from the right side of the engine 16.

Further, as shown in FIG. 2, the front frame component 11 is provided horizontally between the front end portions of the pair of left and right center frame components 9 and 10, and the front frame component 11 is provided.
The left and right end parts of the front seedling table support frame structure 12 are connected to the left and right side parts thereof, and the front frame structure 1
The battery 23, the engine 16, the transmission 45, and the hydraulic pump 46 are arranged in this order from the right side in a region surrounded by 1 and the left and right side portions of the preliminary seedling stand support frame structure 12. As shown in FIGS. 1 and 4, the engine 16, the battery 23, and the hydraulic pump 46 are covered with a flat front step 63.

As shown in FIG. 7, the engine 16
A fan case cover 88a that is open downward is attached to the fan case 88 so that the high temperature air in the bonnet front structure 62 is not sucked in as cooling air. In this way, by improving the heat balance of the engine 16, the running performance is improved. Further, particularly in the case of the type in which power is taken out from the drive shaft 42 of the engine 16 as in the present embodiment, the fan case cover 88a is provided near the drive shaft 42 such as the drive shaft 42 and the output side pulley 53. It can be used as a protective cover for preventing contact with a device or wiring cord that has been removed. As described above, by providing the fan case cover 88a with a plurality of functions, it is possible to reduce the number of parts and contribute to cost reduction.

The front step 63 has step support columns 51, 5 formed on the machine body frame 5 in a state where its tip portion is extended toward the left and right sides of the engine 16.
It is placed on top of 2. Also, front step 63
Has a front cover 65 that is openably and closably disposed on a bifurcated front portion. The front cover 65 has a front frame structure 11
It can be opened and closed centering around.

Further, the engine oil detecting and lubricating port 67 of the engine 16 is located inside the front cover 65. In particular, a front cover 65 that functions as an opening / closing lid is provided in a notch formed in the front center of the front step 63, and the engine 16 is provided inside the front cover 65.
The engine oil inspection / refueling port 67 is located and the front cover 65 can be opened and closed without removing the front step 63 to perform engine oil inspection and refueling work.

As shown in FIG. 8, the front step 6
A bonnet front structure 62 and a bonnet rear structure 68 are mounted on the upper part of 3 in order from the front, and the front and left and right sides of the engine 16 and the fuel tank 40 are covered by the bonnet front structure 62. The rear part of the engine 16 and the fuel tank 40 are covered by the rear hood structure 68. That is, these bonnet front components 62
Bonnet 60 composed of a hood and a post-hood 68
The engine 16 and the fuel tank 40 arranged in the front part of the machine body are covered by.

As shown in FIG. 9, the front bonnet structure 62 has recesses 69, 69 located on the upper side of the substantially central portion when viewed from the front by narrowing the left and right widths of the upper portion than the left and right widths of the lower portion.
Is formed. For example, when a fertilizer applicator is mounted behind the seat 83, the recess 69 allows a worker to comfortably take a comfortable position and put a heavy weight on the fertilizer bag when the fertilizer applicator is mounted on the front step 63. The concave portion 69 is formed by a smooth curved surface which is continuous with the left and right side surfaces of the bonnet front structural body 62.

As shown in FIG. 4, the bonnet front structure 62 according to the present invention includes a locking mechanism 70A for locking the bonnet front structure 62 to the machine body frame 5 side and a bonnet front structure 62. A lock mechanism 7 for locking the movement of the bonnet front structure 62 by urging it backward.
0B and 0B are provided respectively.

First, the structure of the locking mechanism 70A will be described. The locking mechanism 70A is the bonnet front structure 6
2 is formed in the lower front end, and as shown in FIGS. 4, 8 and 9, a locking member 62a is formed in the left and right center of the lower front end of the bonnet front structure 62. In this embodiment, a tongue piece integrally formed with the bonnet front structure 62 is projected forward and downward to form a locking member 62a. On the other hand, as shown in FIGS. 4 and 5, a bracket 72 extending in the left-right width direction is horizontally mounted between the midway portions of the steering shaft support frame components 25 and 26.
An engaging piece 73 is provided in the lower center part of the, and an engaging portion 74 is provided on the engaging piece 73. In this embodiment, a horizontally elongated hole formed in the locking piece 73 is used as the locking portion 74. Then, the front end of the bonnet front structural body 62 is locked to the machine body frame 5 by inserting and engaging the locking member 62a in the locking portion 74.

Separately from the locking mechanism 70A, side locking members 62b, 62b projecting rearward are formed integrally with the bonnet front structure 62 on the left and right sides of the rear edge of the bonnet front structure 62. is doing. The side locking members 62b and 62b are engaged with the locking portions 68b and 68b that are integrally formed on the left and right sides of the front part of the bonnet rear structure 68, whereby the front bonnet structure 62 and the bonnet are connected. The horizontal displacement with the rear structure 68 is prevented.

Next, the structure of the lock mechanism 70B will be described. As shown in FIGS. 4 and 10, the lock mechanism 70B is provided on the upper rear portion of the bonnet front structure 62, and mainly includes an elastic body 81, an elastic body mounting member 80, and an elastic body locking member 82. It is configured.

The bonnet front structure 62 has an opening 75 formed at an upper rear portion thereof, the fuel filler port 76 of the fuel tank 40 is located at the opening 75, and the fuel filler port lid 77 for refueling can be opened and closed in the opening 75. Further, the elastic body locking member 82 is formed at the upper end of the opening 75. That is,
An elastic member locking member 82 is provided at the rear of the bonnet front structure 62. In this embodiment, as shown in FIG. 9, the elastic body locking member 82 is a locking hole formed at the center of the upper end of the opening 75 of the hood front structure 62.

On the other hand, a bracket 79 is provided on the upper end of the steering post 28 so as to project forward, and the bracket 7
Female screw 80a as elastic body mounting member 80 at the tip of 9
Is provided. Further, the elastic body 81 is attached to the female screw 80a.
The male body 80b is screwed with one side of the elastic body
1 is fixed to a bracket 79 provided on the steering post 28. That is, one side of the elastic body 81 is fixed to the main body side via the elastic body mounting member 80.

Further, as shown in FIG. 11, a spring is used as the elastic body 81 in this embodiment. The elastic body 81 has a mounting portion 81a for mounting the elastic body mounting member 80 on one side, and a claw portion 81b for locking the elastic body locking member 82 on the other side, and a handle portion. 81c is formed. The elastic body 81 is normally attached to the elastic body attachment member 80, and the lock mechanism 70
The member relating to B is prevented from being lost due to the attachment / detachment of the bonnet front structure 62. However, since the elastic body 81 is configured to be detachable from the elastic body mounting member 80,
It is possible to remove the elastic body from the main body side at the time of maintenance so that the elastic body does not hinder the work.

When the front bonnet structure 62 is locked, with the front end portion of the front bonnet structure 62 locked to the machine frame 5 by the locking mechanism 70A, the refueling port lid 77 is opened and the inside of the refueling port lid 77 is closed. Put a hand on the elastic body 81, put a finger on the handle portion 81c of the elastic body 81, pull the elastic body 81 forward, and attach the elastic body 81 to the elastic body locking member 82 formed at the rear part of the bonnet front structure 62. When the claw portions 81b of the hood are locked, the bonnet front structure 62 is biased rearward by the elastic body 81. That is, the hood front structure 62
Is fixed and locked at a fixed position in front of the bonnet rear structure 68.

To unlock the front bonnet structure 62, the refueling port cover 77 is opened, a hand is put inside the refueling port cover 77, and a finger is put on the handle portion 81c of the elastic body 81. The elastic body 81 is pulled forward, and the claw portion 8 of the elastic body 81 is pulled.
The engagement between 1b and the elastic body locking member 82 is released.

As described above, the elastic body mounting member 80, the elastic body 81, and the elastic body locking member 82, which are the constituent members of the lock mechanism 70B, are covered with the oil supply port cover 77 as an opening / closing cover, and the opening / closing cover (fuel supply port cover). 77) Inside the lock mechanism 7
The lock operation and the unlock operation of 0B can be performed. Therefore, the components of the lock mechanism 70B are not exposed on the outer appearance of the bonnet 60, and the lock mechanism 70B is not exposed.
The operator's body will not come into contact with the components of
It is possible to prevent the bonnet front structural body 62 from falling off due to being unlocked without making the structure complicated, and it is possible to improve the safety and the appearance of the lock mechanism 70B. Since the member is not exposed, the design can be good.

In particular, the bonnet front structure 6 is used as an opening / closing lid.
Since the oil supply port lid 77 for refueling provided in 2 is used, it is not necessary to separately provide an opening / closing lid to cover the constituent members of the lock mechanism 70B, and the number of constituent parts can be reduced. Manufacturing costs and parts management costs can be reduced, and the weight of the machine can be reduced.

Further, the bonnet rear structure 6 according to the present invention
As shown in FIG. 4, a locking mechanism 71A for locking the bonnet rear structure 68 on the body frame 5 side and a bonnet rear structure 68 by urging the bonnet rear structure 68 forward are shown in FIG. Locking mechanism 7 for locking the movement of
1B and 1B, respectively.

The locking mechanism 71A is provided at the rear of the bonnet rear structure 68, and a locking member 68a is provided at the lower rear end of the bonnet rear structure 68.
In the present embodiment, the downward protruding piece integrally formed with the bonnet rear structure 68 is used as the locking member 68a. On the other hand, the front step 63 mounted on the upper front end of the machine body frame 5 is provided with a locking portion 63a. In this embodiment, a long hole integrally formed with the front step 63 is used as the locking portion 63a.

Then, the rear end portion of the bonnet rear structure 68 is locked to the machine body frame 5 side by inserting and engaging the locking member 68a with the locking portion 63a. The locking member 68 provided in the locking mechanism 71A
The number of a and the locking portions 63a is not limited, and it is preferable to appropriately change the numbers so that the bonnet rear structure 68 is favorably locked to the machine frame 5 side. In addition to the locking mechanism 71A, as shown in FIG. 8, protruding pieces 68 projecting downward from the lower ends on the left and right sides of the front part of the bonnet rear structure 68.
c, 68c are provided, and the protrusion pieces 68c, 68c are inserted into and locked in the locking holes 63b, 63b provided in the front step, thereby locking the lateral movement of the bonnet rear structure 68. is doing.

Locking mechanisms 71B and 71B are provided on the left and right sides of the front portion of the bonnet rear structure 68. The lock mechanisms 71B and 71B are provided on both left and right sides of the bonnet rear structure 68, and their configurations are left-right symmetric with respect to the center line in the left-right direction of the machine body. Therefore, the left-side lock mechanism 71B will be described here.

In the lock mechanism 71B, an elastic body 97 having substantially the same shape as the lock mechanism 70B formed between the hood front structure 62 and the body frame 5 is used to attach the bonnet rear structure 68 to the front. Airframe frame 5
Against that movement is locked.

As shown in FIGS. 6 and 10, a mounting portion 97a of an elastic body 97 for urging the bonnet rear structure 68 forward.
Is attached to the elastic body attaching member 102 which is a convex portion integrally formed inside the bonnet rear structure 68. Further, the stay 103 fixed to the steering shaft support frame structure 25 is provided with an elastic body locking member 103a. In this embodiment, the fuel tank mounting hole 103
The hole formed in the stay 103 in which b is formed is used as the elastic body locking member 103a.

While the rear portion of the bonnet rear structure 68 is locked to the machine body frame 5 side by the locking mechanism 71A, a finger is put on the handle portion 97b of the elastic body 97 to move the elastic body 97 forward. The lock and unlock operation can be performed by pulling out to and engaging or releasing the locking portion 97c and the elastic locking member 103a. Therefore, it is possible to perform the lock and unlock operations by a simple operation, and even though the structure is simple, the bonnet rear structure 68 is biased forward while being locked at the rear portion thereof and the main body side. Well fixed to.

At the time of assembly, first, the bonnet rear structure 68 is fixed, and then the bonnet front structure 62 is fixed. Therefore, the lock mechanism 71B is configured in the internal space of the bonnet 60, but its operation is not supported, and the constituent members of the lock mechanism 71B are not exposed to the outside of the bonnet 60, so that the operator's It is possible to prevent the lock from being released abruptly due to contact or the like and the post-hood structure 68 from falling off.
In addition, the design can be good.

As described above, the bonnet front structure 62 is
The locking mechanism 70A urges the lock mechanism 70B rearward with the front part thereof locked to the machine body frame 5 side, while the bonnet rear structure 68 includes the locking mechanism 7A.
In the state where the rear portion is locked to the machine body frame 5 side by 1A, it is urged forward by the lock mechanism 71B, and these bonnet front structure 62 and bonnet rear structure 6
8 is satisfactorily fixed to the machine body frame 5 (on the machine side).
Further, in either the bonnet front structure 62 or the bonnet rear structure 68, the fixing operation to the machine frame 5 (on the machine side) and the fixing release operation are easy, and the operation can be performed from the front side of the machine body.

[Driving Operation Section] Next, the structure of the driving operation section 8 will be described. The driving operation unit 8 is shown in FIGS.
As shown in FIG. 10 and FIG. 10, the seat 83 is attached to the upper center of the seat support frame structure 14 of the machine body frame 5, and the steering shaft 27 is rotatably disposed in front of the seat 83 with a predetermined space. Steering shaft 27
Is rotatably supported by a steering post 28, and the steering post 28 is supported by the bonnet rear structure 6
8 and the operation levers (main speed change lever 84a and seedling joint lever 84b) and left and right brake pedals (not shown) are arranged on the right side of the bonnet rear structure 68, while the left side of the bonnet rear structure 68 is arranged. The clutch pedal 85 is provided in the. In the figure, 104 is a steering shaft 27.
It is a steering wheel attached to the upper end of.

At a position immediately in front of the seat 83, as shown in FIG. 4, a horizontally long rectangular box-shaped key switch panel 87 attached to the steering post 28 via a bracket 29a.
Are installed. The key switch panel 87 is provided with various warning lamps and switches on the upper surface thereof, and the key switch 91 is provided on the lower right portion of the rear side surface.

As shown in FIG. 10, the key switch panel 87 is fixed to the steering post 28 by being fastened together with a support stay 90 for mounting the fuse box 89. Therefore, the fuse box 89 is fixed to the key switch panel 87. It is disposed on the opposite side of the front and rear through the panel 87 and the steering post 28 and behind the fuel tank 40 and inside the bonnet rear structure 68. As shown in FIG. 6, the stay 90 has fuse box mounting portions 90a and 90b formed on the lower portion of the front end thereof, and the fuse box 89 is fixed to the fuse box mounting portions 90a and 90b by a fixing tool such as a bolt. In this way, the fuse box 89 is attached to the fuel tank 4
By arranging by utilizing the dead space between 0 and the steering post 28, it is not necessary to separately secure a space for the fuse box 89, which enables a space-saving design.

Further, as described above, the bonnet rear structure 68
The fuse box 89 disposed inside the upper part of the fuse box 89 is designed in consideration of convenience during maintenance.
The maintenance opening 89a is arranged so as to face upward. Therefore, the fuse box 89 can be easily visually confirmed by opening the fuel filler cap 77 described later, and further,
Since the maintenance opening 89a of the fuse box 89 faces upward, maintenance of the fuse is easy and contributes to improvement of workability.

As shown in FIGS. 6 and 13, depending on the size of the fuse box 89, the support stay 90 is used.
The fuse box 89 can be attached to the fuse box attachment portion 90c formed in the middle instead of the lower portion of the front end. In this case, the fuse box 89 is arranged along the steering post 28, which allows a more compact layout.

Further, as shown in FIGS. 12, 14 and 17, below the key switch panel 87, a switch for finely adjusting the left and right angles of an automatic horizontal control device (not shown) of the planting device 3. A switch box 92 having a plurality of switches is provided.

A window 96A for a switch box 92 is formed in a mounting panel 96 fixed to a stay provided under the steering post 28, and the switch box 92 is mounted here. When the switch box 92 is inserted from above the window hole 96A, the upper panel 92a of the switch box 92 is formed larger than the window hole 96A, and the switch box 92 is locked to the mounting panel 96 by the upper panel 92a. There is.

On the other hand, below the mounting panel 96, a cover body 78 for covering the switch box 92 is fixed to the bottom surface of the switch box 92 by fixing members 78a, 78a. A rib 96Aa is formed at the edge of the window 96A of the mounting panel 96, and the cover body 78 is locked by the rib 96Aa so that the position of the cover body 78 does not shift.

The mounting panel 96 has guide grooves 96b.9 for the main gear shift operation lever 84a and the seedling splicing lever 84b.
6c is formed. In this way, by arranging a plurality of switches, operation levers, and the like together, operability is improved and the cost is reduced. However, when the rice transplanter 1 is not equipped with an automatic horizontal control device, the mounting panel 96 is not provided with the window hole 96A.

Further, as shown in FIGS. 4 and 12, the driving operation section 8 interlocks the upper end of the torque generator 93 for power steering with the end of the steering shaft 27, and connects it to the lower end of the torque generator 93. Steering case 95 accommodating the reduction mechanism 94 (see FIG. 15)
Are linked together. The torque generator 93 and the steering case 95 are arranged between the engine 16 and the transmission case 34, and the steering case 9
5 and the mission case 34 are formed as separate and independent bodies.

The torque generator 93 and the steering case 95 will be described. As shown in FIGS. 4 and 12, a steering support 19 for supporting a steering case 95 is provided at the rear end of the engine support 17 provided for supporting the engine 16 on the machine body frame 5, and the steering support 19 is provided. The torque generator 93 is mounted on the upper portion of the body 19, while the steering case 95 is disposed on the lower portion of the steering support body 19. The torque generator 93 and the steering case 95 are two bolts on the left and right, that is, a total of four bolts 98. · 98 · · · · Directly fastened via the steering support 19 of the aircraft frame 5,
Further, the rear end of the steering support 19 and the front end of the mission case 34 are connected via a bracket 99, while the lower rear end of the steering case 95 is provided with a reinforcement support 100 at the lower rear end. It is connected through.

As shown in FIG. 15, the torque generator 93 has a case body 106 covering the lower end portion of the torque generator body 105 between the torque generator body 105 and the steering case 95. A power steering oil circulation passage formed inside the torque generator body 105 is sealed by 106. In the figure, 107 is an oil outlet, and 108 is an oil inlet. The case body 106 has a drain opening 109 at the rear end for discharging the oil of the torque generator body 105. In the figure, 110 is a drain pipe.

As described above, the oil pressure port surface provided with the oil outlet 107 and the oil inlet 108 of the torque generator 93 is connected to the torque generator 93 and the engine 1.
The torque generator 93 and the engine 16 can be compactly laid out by disposing the torque generator 93 and the engine 16 toward the dead space side, without separately securing a space for hydraulic piping. Then, as shown in FIG.
A joint 108a is connected to the oil intake port 108,
A base 108, which is an oil intake port, is provided at the tip of the joint 108a.
By arranging b, the position of the mouthpiece 108b is arranged in a wide space by using the joint 108a, so that the maintainability is improved and the compact layout is realized at the same time.

Further, the torque generator 93 includes the intermediate shaft 1 projecting from the lower end of the torque generator main body 105.
A base end portion of an output pongee 112 rotatably provided inside the case body 106 is connected to a tip end portion of the case body 106, and an output gear 113 is attached to a tip end portion of the output shaft 112.

On the other hand, the steering case 95 is shown in FIG.
As shown in FIG. 3, the upper opening of the steering case body 116 is covered with the steering case lid 117, and the speed reduction mechanism 94 is accommodated inside. The reduction mechanism 94 includes the steering case body 116 and the steering case lid 1.
A large-diameter transmission gear 119 that meshes with the output gear 113 is attached to the upper part of an input pongee 118 rotatably supported by 17, and a small-diameter transmission gear 120 is attached to the lower part of the large-diameter transmission gear 119. A fan-shaped turning gear 122 is attached to an upper portion of an output pongee 121 rotatably supported by a rear portion of the steering case body 116, and the small diameter transmission gear 120 and the turning gear 122 are meshed with each other.

In the steering case 95, the output pongee 121 is projected downward at the lower rear portion of the steering case body 116, and a plate-shaped pitman arm 123 is attached to the lower end of the output pongee 121. A pair of left and right drag links 124 at the front end of the
125 are linked together, and the drag link 124.
125 is interlockingly connected to knuckle arms (not shown) provided on the left and right front axle cases 35 and 36.

[0070]

Since the present invention is constructed as described above,
The following effects are achieved.

That is, as described in claim 1, in the agricultural working machine in which the bonnet is composed of the front bonnet structure and the rear bonnet structure, the front and rear one side of either the front bonnet structure or the rear bonnet structure is locked. A member is provided to engage with the locking portion provided on the machine side, and an elastic body locking member is provided on the other side of the front and rear to engage with the elastic body provided on the machine side, and one of the components is attached to the other side. Since the bonnet is urged and supported in the direction of the component, the bonnet is favorably locked by the elastic body in a state of being fixed to the main body side with a simple structure. Further, the bonnet can be easily locked or unlocked by locking or unlocking the elastic body. Moreover, the work of attaching and detaching the bonnet can be performed in front of the machine body, and the workability of the maintenance work of the engine and the like can be improved.

According to a second aspect of the present invention, in an agricultural working machine in which a bonnet is composed of a front bonnet structure and a rear bonnet structure, a locking member is provided on one of the front and rear sides of either the front bonnet structure or the rear bonnet structure. It is provided to engage with the locking part provided on the machine side, and an elastic body locking member is provided inside the bonnet on the other side of the front and rear to lock with the elastic body provided on the machine side, and one component is Since it is biased and supported in the direction of the side structure, the lock part is not exposed on the exterior of the bonnet, the worker's body does not come into contact with the lock part, and it is a good design. Can be

[Brief description of drawings]

FIG. 1 is a left side view showing a rice transplanter according to an embodiment of the present invention.

FIG. 2 is a plan view showing a body frame.

FIG. 3 is a left side view of the same.

FIG. 4 is a left side view showing a motor part.

FIG. 5 is a perspective view showing a steering shaft support frame structure.

FIG. 6 is a plan view of the same.

FIG. 7 is a side view of a fan case of the engine.

FIG. 8 is a left side view showing a front hood structure and a rear hood structure.

FIG. 9 is a front view of the front bonnet structure without the filler cap.

FIG. 10 is a left sectional side view showing the upper rear portion of the bonnet front structure and the bonnet rear structure.

FIG. 11 is a view showing an elastic body.

FIG. 12 is a left side view showing a steering mechanism.

FIG. 13 is a view showing another example of mounting the fuse box.

FIG. 14 is a diagram showing a switch box and its mounting panel.

FIG. 15 is a side sectional view showing a torque generator and a steering case.

FIG. 16 is a front view showing a torque generator.

FIG. 17 is a partial sectional view showing the mounting of the switch box.

[Explanation of symbols]

16 engine 60 bonnet 62 Front hood structure 62a locking member 63a Locking part 68 Post-hood structure 68a locking member 73 Locking piece 74 Locking part 80 Elastic member 81 Elastic body 82 Elastic member locking member 97 Elastic body 102 Elastic member 103 Elastic member locking member

Continued front page    (72) Inventor Koji Miyake             1-32 Yanma, Chayamachi, Kita-ku, Osaka-shi, Osaka             -Agricultural machinery Co., Ltd. F term (reference) 3D004 AA12 AA13 BA05 CA12 DA02                       DA07

Claims (2)

[Claims] 1. An agricultural working machine in which a bonnet is composed of a front bonnet structure and a rear bonnet structure, wherein a locking member is provided on one of the front and rear sides of either the front bonnet structure or the rear bonnet structure, and the machine side. To engage with the locking part provided on the front side and the other side with elastic body locking members to lock with the elastic body provided on the machine side, and attach one structure in the direction of the other side structure. The bonnet attachment / detachment structure is characterized by being supported by the power. 2. An agricultural working machine in which a bonnet is composed of a front bonnet structure and a rear bonnet structure, and a locking member is provided on one of the front and rear sides of either the front bonnet structure or the rear bonnet structure to provide the machine side. To engage with the locking portion provided on the front side and the other side of the hood to provide elastic body locking members to lock the elastic body provided on the machine side, and A bonnet attachment / detachment structure characterized by being biased and supported in the same direction.