JP2003320962A - Bonnet structure for work vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bonnet structure having a vibration preventing device capable of accurately locking a bonnet when locking, reducing cost by using may common members in bonnets between work vehicles of different specifications, and protecting the important devices inside the bonnets. <P>SOLUTION: In a work vehicle having a bonnet 6 which can be opened/closed before or after covering an engine 5, vibration preventing members 32a, 32b are provided in the body and bonnet sides and arranged to abut on each other when opening or closing the bonnet, and the vibration preventing members 32a, 32b are disposed in the vicinity of the lower parts in both right and left sides of the opening/closing pivot point of the bonnet 6 and upper parts in both right and left sides of a radiator 20. The body side vibration preventing member 32a is attached to a shield plate 24 through a mounting member 33, and the mounting member 33 is replaceably attached to a front or rear surface of the cover plate 24. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a hood of a work vehicle.

[0002]

2. Description of the Related Art Conventionally, a hood, which is a work vehicle, has been equipped with a hood at the front of the body of the tractor to house an engine, a radiator and the like inside, and to prevent and protect these devices from being exposed to the outside. Techniques for reducing the above are known. This bonnet is configured such that the front side of the machine body can be opened and closed, and by opening the bonnet, the above-mentioned device housed inside can be inspected.
A shake prevention device is provided to prevent interference with internal parts when the bonnet is opened and closed, and to securely lock the bonnet. As shown in FIG.
The shake prevention device 101 is an opening / closing fulcrum 1 of the hood 102.
03 Shake prevention member 1 provided near the bottom of the bonnet
01b and a main body side shake preventing member 101a. The body-side shake preventing member 101a is used for the engine 10
4 A heat shield plate for the fuel tank 105 provided at the rear is used. The bonnet-side shake preventing member 101b is disposed on the inner peripheral surface of the rear part of the bonnet 102, and the bonnet-side shake preventing member 101b and the main body-side shake preventing member 101a are in contact with each other to prevent shake when the bonnet 102 is opened and closed.

[0003]

However, in the conventional bonnet, since the shake preventing devices are provided only at two positions on the left and right of the rear part of the bonnet, the shake of the front part becomes large even if the shake of the rear part of the bonnet is small. However, in order to reduce this shake, a large shake preventive device was required. When this shake prevention device becomes large, there is a problem that it becomes an obstacle in terms of space and maintenance. Since the lock device for holding the bonnet in the closed state is arranged at the front end of the bonnet and the shake preventing device is provided at the rear part of the bonnet, the shake preventing device has a long distance from the position of the lock device and is opened and closed. There was also a problem that the accuracy of the lock was poor due to shaking. Therefore, in the present invention, when locking the bonnet, there is a shake prevention device that can be locked with high accuracy, and in the bonnet between work vehicles of different specifications, many common members are used to reduce costs, and To provide a bonnet structure capable of protecting important devices.

[0004]

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 a work vehicle having a hood that can be opened and closed with the front or rear of the engine as a fulcrum, sway prevention members are provided on the main body side and the bonnet side, respectively, and the bonnets contact each other when opening and closing the bonnet. The runout preventing members are provided so as to be in contact with each other, and the runout preventing members are provided near the lower left and right sides of the hood opening and closing fulcrum and the upper left and right sides of the radiator.

According to a second aspect of the present invention, the body-side shake preventing member is attached to the shielding plate via an attaching member, and the attaching member is removably attached to the front surface or the rear surface of the shielding plate.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described. 1 is a side view of a tractor, FIG. 2 is a side view showing the inside of a hood, FIG. 3 is a front view of the same, FIG. 4 is a side view of a front frame and an air cleaner, FIG. 5 is a side view of a front shake prevention device, 6 is a front view of the same, FIG. 7 is a view showing the open / closed state of the bonnet, FIG. 8 is a side view showing the bonnet structure of a small type and a large type, FIG. 9 is a partially enlarged view, and FIG. 10 is a lops specification and a cab. FIG. 11 is a side view showing a conventional anti-vibration device, FIG. 12 is a side view of a work vehicle having a conventional front frame, and FIG. 13 is a side view showing a conventional front frame. 14 is a cross-sectional view showing a conventional seal member.

In FIGS. 1 and 2, this work vehicle uses a tractor as an example. Front and rear wheels 1 and 2 are supported at the front and rear of the machine, and an engine 5 is arranged inside a hood 6 on an engine frame 8. A dashboard 12 is arranged behind the bonnet 6, a display panel 7 and a steering handle 10 are provided on the dashboard 12, and the seat 1 is arranged behind the steering handle 10.
1 is provided.

A clutch housing is arranged in the rear part of the engine 5, a mission case 9 is arranged in the rear part of the clutch housing, the power from the engine 5 is transmitted to the rear wheels 2 for driving, and the mission case 9 is further arranged. Two wheels
The driving force can be simultaneously transmitted to the front wheels 1 via the four-wheel drive switching mechanism.

The driving force of the engine 5 is transmitted to the PTO shaft 15 projecting from the rear end of the transmission case 9, and the PTO shaft 15 is connected to the rear end of the machine body via a universal joint (not shown) and a working machine mounting device. It is configured to drive a work machine (not shown) that has been installed. A clutch pedal 16 and a brake pedal for engaging and disengaging the main clutch are provided on the lower front side of the seat 11.

Next, an outline of the arrangement structure inside the bonnet 6 on which the engine 5 is mounted will be described with reference to FIGS. 2 and 3. The engine 5 is mounted on an engine frame 8, a fan shaft is projected forward from the engine 5, a cooling fan 18 is fixed on the fan shaft, and the cooling fan 18 is rotationally driven by driving the engine 5. A radiator 20 and an air conditioner condenser 2 arranged in front of the cooling fan 18.
3 is cooling. The radiator 20 and the cooling fan 18
A shielding plate 24 is disposed at the boundary between the shielding plate 24 and the shielding plate 24, and sealing members such as urethane and rubber are attached to the upper and left and right side portions of the shielding plate 24. And the radiator 20
The battery 19 is arranged in front of the capacitor 23.

The bonnet 6 is composed of an upper cover 61, a front cover 62, and both side covers 63 and 63. The left and right sides of the engine 5 are side covers 63 and 63.
The front cover 62 covers the front and the upper cover 61 covers the upper part. The upper cover 61 and the front cover 62 are integrally formed, and the upper cover 61 and
Above the front cover 62 inside, the headlight 22
(Fig. 1) is attached. Further, a rotation fulcrum 65 is provided on the rear part of the bonnet 6 on the front of the dashboard 12 so that the bonnet 6 can be rotated upward and rearward to be opened. Is provided and is held in the closed state by the lock device 51. However, the rotation fulcrum 65 may be provided at the front part to open the bonnet 6 to the upper front side.

Next, the front frame will be described. The front frame is attached to protect the hood and the driver's seat when the vehicle falls. 12,
As shown in FIG. 13, a conventional front frame 111
Are arranged between the air cleaner 112 and the radiator 113. Below the line B connecting the front frame 111 and the front end of the upper part of the cabin 114, the safety space C
Therefore, the inside of the bonnet 115 and the inside of the cabin 114, which are safe space areas, were protected. However, since the conventional front frame 111 is located between the air cleaner 112 and the radiator 113, the safety space area C is narrowed,
Further, when the front frame 111 is deformed, there is a problem that the safety space area C is greatly reduced. The same applies to tractors with safety frame specifications.

Therefore, as shown in FIGS. 2 to 4, the front frame 26 is arranged in front of the air cleaner 25. That is, the front frame 26 is arranged in front of the conventional front frame. In this way, by arranging the front frame 26 in front of the air cleaner 25,
A large safety space can be secured, and important parts such as the air cleaner 25 and the radiator 20 can be protected when the vehicle falls. A mounting member 25a is attached to the front portion of the air cleaner 25, and
The air cleaner 25 is fixed to the front frame 26 by fixing 5a to the front frame 26 with a bolt. A mounting member 25a is attached to the front portion of the air cleaner 25. The mounting member 25a is fixed to the front frame 26 with a bolt or the like, and the air cleaner 25 is fixed to the front frame 26.

The front frame 26 is gate-shaped in a front view (FIG. 3), and has a shape in which two bent portions having a "V" shape are arranged at upper and lower portions so that the upper portion is located at the front and the lower portion is located at the rear in a side view. It has become. The front frame 26
Is arranged so as to surround the battery 19, and the lower portion of the front frame 26 is an L-shaped fixing member 27.2 in a front view.
It is fixed to the engine frame 8 via 7. As described above, by arranging the upper portion of the front frame 26 in the front, a large safety space can be secured, and by arranging the lower portion of the front frame 26 in the rear, a fixing member that is an attachment portion of the front frame 26 can be obtained. 27 can be disposed without interfering with the front wheel 1, and the battery 19 can be easily attached and detached.

Next, the bonnet shake preventing device will be described. First, a shake prevention device in a large type hood will be described. As shown in FIG. 2, the shake preventing devices 31 and 32 are provided in the front part and the rear part in the state where the bonnet 6 is closed, and prevent the shake in the left-right direction when the bonnet 6 is closed.

First, the rear shake prevention device 31 provided at the rear of the hood 6 will be described. As shown in FIGS. 2 and 7, the rear shake prevention device 31 is provided at two places on the left and right, and the shake prevention member is composed of a main unit side shake prevention member 31a and a bonnet side shake prevention member 31b. The machine-side shake prevention member 31a is mounted and fixed on the upper portion of the engine 5 near the rotation fulcrum 65 of the bonnet 6, and the bonnet-side shake prevention member 31b is provided on the side inner peripheral surface of the upper cover 61. There is. Then, the apparatus side shake preventing member 3
1a and the bonnet-side shake preventing member 31b are formed so as to come into contact with each other when the upper cover 61 is opened and closed. When the upper cover 61 is closed, they come into contact with each other and regulate a lateral shake to a predetermined value. Guide to close in position.

Next, the front shake prevention device 32 provided at the front of the hood 6 will be described. 2, 5,
As shown in FIG. 6, the front shake prevention device 32 is disposed diagonally above and behind the lock device 51 provided in the lower front portion of the bonnet 6, and in the present embodiment, a pair of left and right is disposed above the left and right sides of the radiator 20. Has been done. The front shake prevention device 32
Similar to the rear shake prevention device 31, is configured by a main body shake prevention member 32a and a hood side shake prevention member 32b.

The machine-side shake preventing members 32a, 32a
Are provided at two places on the left and right sides, and are fixed to the front surface side of the shield plate 24 mounted around the rear portion of the radiator 20 with bolts or the like via mounting members 33. The mounting member 33 is formed in an inverted L shape in a side view, and a lower horizontal portion of the main body side shake preventing member 32a is fixed to the upper horizontal surface by a bolt or the like. The machine-side shake preventing member 32a is substantially C-shaped when viewed from the front and is D-shaped when viewed from the side, and is made of a member having elasticity such as a steel plate.

The bonnet-side shake preventing member 32b is substantially U-shaped in a front view (FIG. 6), has a shape substantially along the inner peripheral surface of the upper cover 61, and is made of a member such as a steel plate having elasticity. The part that comes into contact with the machine-side shake prevention member 32a is configured to be wide in the front-rear direction to widen the area of contact when the bonnet is opened and closed.
I try to reduce the vibration as much as possible. However, the hood side shake preventing member 32b may be divided into the right and left parts. When closing the upper cover 61,
It is formed so as to come into contact with the main body side shake prevention member 32a and press against each other by the elasticity of the both, so as to prevent shake in the left and right directions, and also suppress vibrations during work and running.

As described above, by providing the shake preventing devices 31 and 32 on the front and rear portions of the bonnet 6, as shown in FIG. 7, at the beginning of closing the upper cover 61 ((a) of FIG. 7), The rear shake prevention device 31 prevents shake,
At the end of closing the upper cover 61 ((b) of FIG. 7,
(C)) The front shake prevention device 32 near the lock device 51 of the upper cover 61 prevents the shake. By doing so, each of the shake preventing devices 31 and 32 can be made compact, and efficiency can be improved without hindering maintenance work inside the bonnet 6. Further, since the front shake preventing device 32 is arranged at a position close to the locking device 51, the accuracy of the engaging position when locking the upper cover 61 can be improved.

A clamp 34 for the wiring 35 for the headlight 22 is attached to the hood side shake preventing member 32b of the front shake preventing device 32. The clamp 3
Reference numeral 4 is for holding and fixing the wiring 35 for the headlight 22 arranged in the front part of the bonnet 6 so as not to get in the way. As shown in FIGS. 5 and 6, the clamp 3
4 and 34 are arranged on the left or right side of the hood side shake preventing member 32b, and the bonnet side shake preventing member 3 is provided.
It is integrally attached to the lower surface of 2b. The clamps 34, 34 are constituted by a holding tool, a binding band, etc., and the clamps 34, 34 are inserted into the mounting holes provided in the hood side shake preventing member 32b to fix or clamp the wiring 35. ing.

Conventionally, since the clamp is directly attached to the inside of the design surface of the bonnet by welding or the like, there is a problem that the appearance is poor. However, in this way, the bonnet side runout preventing member 32b has a wiring clamp for the headlight 22. By integrally attaching 34, it is possible to improve the appearance of the bonnet 6 and reduce the cost. In this embodiment, the clamp is attached to the right side portion of the hood side shake preventing member, but the clamp mounting position is not limited as long as it is the inner peripheral surface of the bonnet side shake preventing member.

The small type hood 76 is
As shown in FIG. 8, the large type bonnet 6 has a shortened overall length and has substantially the same shape. That is, the front part of the upper cover 61 and the front cover 62 are molded by using a common mold, and have the same shape, and the rear length of the upper cover 61 is changed to make a large type ((b) of FIG. 8). And a bonnet of a small type ((a) in FIG. 8) is formed. Therefore, substantially the same member can be used in the front portion from the radiator, and the cost can be reduced. Both the shield plate 24 and the front shake prevention device 32 are common members between the tractors having the large and small type bonnets 6 and 76.

That is, when the main unit side shake prevention member 32a is attached to a compact type tractor, the attachment member 33 is left-right replaced and fixed to the rear surface side of the shield plate 24.
That is, when mounting on a large type specification tractor (Fig. 9
(B)) and the case of mounting on a small type specification tractor ((a) of FIG. 9), the same parts are used, but the mounting member 33 is swapped left and right and mounted on the opposite side to the shield plate 24. Of. However, it can be configured to be attached symmetrically in the front-rear direction, and in this case, it is not necessary to replace them. In this way, in the compact type tractor, the same front bonnet as that of the large type is used, the position of the radiator 20 is arranged forward compared to the large type, and the mounting position of the bonnet side shake prevention member 32b does not change. , The mounting member 33 is replaced with the right and left shielding plates 24
The position of the machine-side shake preventing member 32a can be matched with the position of the bonnet-side shake preventing member 32b only by making the surface attached to the rear side. By doing this,
The same parts are used to prevent shake,
The number of parts is reduced so that the cost can be reduced.

Next, the seal member mounted between the bonnet and the dashboard will be described. Conventionally, a seal member is attached between the hood and the dashboard to prevent wind leakage and sound leakage. As shown in FIG. 14, the conventional seal member 108 mounted between the bonnet 102 and the dashboard 109 has a single-layer structure, so it is important to manage the dimension A, and a gap is likely to be formed due to variation in dimension, There was a risk of wind and sound leaks. Therefore, a sealing member is provided on each of the bonnet side and the dashboard side to prevent the deterioration of the sealing performance due to the dimensional variation.

For a tractor not equipped with a cabin (LOPS specification equipped with a safety frame), FIG.
As shown in (a), dashboard 1 of bonnet 6
The bonnet side seal member 41 is attached to the end on the second side. On the other hand, the dashboard-side sealing member 42 is attached to the side surface of the dashboard 12 with a fixing member. And
The bonnet-side sealing member 41 and the dashboard-side sealing member 42 are brought into contact with each other to be completely closed.
By doing so, it is possible to prevent the operator in the cabin from being directly blown with air, and at the same time to prevent sound leakage.

On the other hand, in a tractor (cab specification) provided with a cabin, a bonnet side seal member 44 is attached to the cabin side end of the bonnet 6 as shown in FIG. The frame side seal member 45 is attached to the front surface of the. And
The bonnet side seal member 44 and the frame side seal member 45 are arranged with a gap therebetween. As described above, the bonnet-side / frame-side sealing members 44/45 are attached to the bonnet and the front frame, and in a tractor having a cabin, a gap is provided between the bonnet-side / frame-side sealing members 44/45. The wind can pass through and the heat balance performance inside the bonnet can be improved.

[0029]

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

That is, in a working vehicle having a bonnet which can be opened and closed with the front or rear of the engine as a fulcrum as described in claim 1, the body side and the bonnet side are provided with anti-vibration members, respectively, and the bonnet is opened and closed with respect to each other. Since the runout preventing members are arranged so as to contact with each other, the runout preventing members are provided in the vicinity of the lower left and right sides of the bonnet and the upper left and right sides of the radiator, so that the accuracy of the engaging position when locking the bonnet can be improved. Further, since the shake is prevented at two positions, the shake can be surely prevented.

According to a second aspect of the present invention, the body-side shake preventing member is attached to the shielding plate via the attaching member, and the attaching member is removably attached to the front surface or the rear surface of the shielding plate. Even if the work vehicles having different specifications can be attached with the same shake prevention device by simply changing the attachment position, the types of parts can be reduced and the cost can be reduced. In addition, since the front part of the bonnet has the same structure as that of the large type and the small type, the same parts can be used for the shield plate, the shield plate can be shared with the shake prevention device, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a side view of a tractor.

FIG. 2 is a side view showing the inside of the hood.

FIG. 3 is a front view of the same.

FIG. 4 is a side view showing a front frame and an air cleaner.

FIG. 5 is a side view showing a front shake prevention device.

FIG. 6 is a front view of the same.

FIG. 7 is a view showing an opened / closed state of the bonnet.

FIG. 8 is a side view showing a small type and a large type bonnet structure.

FIG. 9 is a partially enlarged view of the same.

FIG. 10 is a cross-sectional view showing a sealing member of LOPS specification and cab specification.

FIG. 11 is a side view showing a conventional shake prevention device.

FIG. 12 is a side view of a work vehicle having a conventional front frame.

FIG. 13 is a side view showing a conventional front frame.

FIG. 14 is a cross-sectional view showing a conventional seal member.

[Explanation of symbols]

5 engine 6 bonnet 20 radiator 24 Shield 32a Main body side shake prevention member 32b Bonnet side shake prevention member 33 Mounting member

Claims (2)

[Claims] 1. A work vehicle having a bonnet that can be opened and closed with a front or a rear of the engine as a fulcrum,
A shake prevention member is provided on each of the main body side and the bonnet side, and they are arranged so as to contact each other when the bonnet is opened and closed.
A bonnet structure for a working vehicle, wherein the shake preventing members are provided near lower portions on both left and right sides of a hood opening and closing fulcrum and upper portions on both left and right sides of a radiator. 2. The body-side shake preventing member is attached to a shielding plate via a mounting member, and the mounting member is removably attached to a front surface or a rear surface of the shielding plate. Work vehicle bonnet structure.