JPH0338063Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Field of industrial application The present invention relates to the structure of a bonnet portion of a mobile agricultural machine such as a tractor, and more particularly to a seal ring structure for sealing the hinge portion of the bonnet.

(B) Prior Art Generally, the hood of a tractor is rotated outward to expose the engine, radiator, battery, etc. for repair and inspection work. The hinge part that rotates and supports the bonnet is equipped with so that when the cooling fan sucks cooling air from the engine from the outside, straw waste etc. will not be sucked into the bonnet. A rubber plate is installed and the rubber plate is pressed against the front grille etc. to seal it.

(c) Problems to be solved by the invention However, with the conventional seal ring structure of the bonnet rotating part described above, as the bonnet is rotated many times, the rubber plate that seals the hinge part breaks down. The bending or deformation creates a gap in the hinge portion, which causes a problem in that dust kicked up during mower operation or the like is sucked into the bonnet through the gap.

(d) Means for solving the problem The purpose of the present invention is to solve the above-mentioned problem. For example, as shown in Figures 1 to 4, the hinge H is A gutter-shaped cover member 13 is installed across the lateral direction of the fuselage so as to cover it, and a first seal member 19 is installed at the front lower part of the bonnet 2, and a first seal member 19 is installed on one side of the cover member 13 facing the front of the fuselage. At the same time, the other side of the cover member 13 facing toward the rear of the fuselage body is brought into close contact with the front cover 14, etc., and a cylindrical second seal member 16 is provided at both ends of the cover member 13 in the lateral direction of the fuselage body. A third seal member 17 is provided on the inner wall of the bonnet 2 and in close contact with the inner wall of the bonnet 2,
It is characterized in that one end thereof is brought into close contact with the outer circumferential surface of the second seal member 16.

(e) Operation Based on the above-mentioned mechanism, in the normal state when the bonnet 2 is in its closed position, the first seal member 19 closes the gap between the front lower part of the bonnet 2 and the gutter-shaped cover member 13 in the vicinity of the hinge H. are sealed, and the second and third seal members 16,1
At 7, the gap between the inner wall of the bonnet 2 and both ends of the cover member 13 is sealed. In addition, the side of the cover member 13 facing toward the rear of the aircraft body is the front cover 1
It is sealed by polymerizing with 4th grade. This results in
When outside air is sucked in by the cooling fan 18 to cool the engine 6, the intake air does not enter the bonnet 2 from the vicinity of the hinge H, but is sucked only from the net portions 5 and 8. Therefore, dust during work is removed by the net portions 5 and 8 and does not enter into the bonnet 2.

On the other hand, when the bonnet 2 is opened to repair or inspect the engine 6, etc., the first seal member 19 closes the bonnet 2 as the bonnet 2 rotates.
The third seal member 17 rotates together with the bonnet 2 while slidingly contacting the outer circumferential surface of the cover member 13, and the third seal member 17 has one end facing the hinge H slidingly contacting the second seal member 16.
can be easily rotated and opened.

(F) Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

The tractor 1 is equipped with a bonnet 2, as shown in FIG.
The fuselage 4 is configured to be able to freely rotate in the front and back direction around the center, and is equipped with a front grill 2a with a net 5 installed in front of it, and a net 8 installed on the side. An engine 6 and a radiator 7 are mounted inside. Further, a guide member 10 having an arcuate guide portion 10a is bolted to a bracket 9 provided at the front of the fuselage 4, and one end of the guide member 10, that is, a portion corresponding to the center of curvature of the guide portion 10a, has a As shown in Figures 1 to 3, the support shaft 3 penetrates
One end of a support member 11 that supports the bonnet 2 is rotatably supported by the support shaft 3. Further, a pin 12 provided at the other end of the support member 11 is fitted into the guide portion 10a, so that the support member 11, that is, the bonnet 2
is able to freely rotate by a predetermined angle in the longitudinal direction of the aircraft, and the support shaft 3 and the guide member 1
0 and the support member 11 constitute a hinge portion H. Further, a gutter member 13 having a semicircular cross section is installed below the support shaft 3, and the gutter member 13 extends toward the rear of the aircraft body to form a flat portion 13a, and the flat portion 13a includes: It is fixed to the guide member 10 by a bracket 15 in a state in which it overlaps and adheres to a front cover 14 provided laterally across the body 4. Moreover, hollow cylinder-shaped cushion members 16, 16 are installed at both ends of the gutter member 13 by inserting the hollow portions into both ends of the support shaft 3, respectively, and the cushion members 16 are installed in the lateral direction of the fuselage. The facing end is in close contact with the inner wall of the bonnet 2.
Further, a long cushion material 17 is fixed to the inner walls on both sides of the bonnet 2 so that its longitudinal direction coincides with the longitudinal direction of the fuselage 4, and the cushion material 17
One end facing the front of the machine body of 7 is the cushion material 1.
It is closely related to the side of 6.

Further, as shown in FIG. 2, a cushion member 19 is provided below the front grille 2a when the bonnet 2 is closed, at a position opposite to the side of the gutter member 13 facing forward of the aircraft body, extending in the lateral direction of the aircraft body. is fixedly installed, and the cushion material 19 is connected to the gutter member 13.
It is configured to slide on the outer periphery of the gutter member 13 as the bonnet 2 rotates. Note that the reference numeral 18 in the figure is a cooling fan.

On the other hand, as shown in FIG. 4, a radiator net 20 is installed in the front part of the radiator 7, and a plate 21 is fixed to the upper part of the net 20. Furthermore, a cushion material 22 is attached to the plate 21.
is fixed. In addition, the cushion material 22
is installed so that its surface 22a coincides with the direction perpendicular to the tangent line drawn to the circle when a circle is drawn with the support shaft 3 as the center of curvature to form the rotation locus of the bonnet 2. Wind shielding board 23 inside
is installed so that its bent surface 23a is perpendicular to the tangent to the circle. Then, the wind shielding plate 23
When the bonnet 2 rotates about the support shaft 3 from the open position to the closed position, the bonnet 2 comes into close contact with the cushion material 22 from directly in front, and the inside of the bonnet 2 is moved in front and behind the radiator net 20. At the same time, it is configured to prevent hot air after cooling the engine 6 from being drawn into the front of the radiator net 20.

Further, as shown in FIGS. 5 and 6, a battery 27 is installed on a plate 26 fixed to the fuselage 4 inside the bonnet 2 which is sealed with a cushion material 25, etc. A battery cord 29 connected to the terminal is connected to the inside of the bonnet 2 from below the plate 26 by passing it through a hole 26a formed in the plate 26. Then, semicircular covers 30, 30 made of synthetic resin or the like are formed with notches 30a, 30a, respectively, so as to form circular holes when the two are put together.
Connect these notches 30a and 30a to the battery cord 2.
9, close it from both sides, and then cover 3
Bolt holes 30b and 3 drilled at 0 and 30 respectively
0b, insert the bolts 31, 31 through the holes 3a, 3a drilled in the plate 26, and then tighten the nuts 32, 32 from the back surface of the plate 26.
As a result, the hole 26a through which the battery cord 29 is passed can be easily sealed. Also, battery code 29
Since it is fixed by the covers 30, 30 at approximately the center of the hole 26a, it is reliably separated from the plate 26 made of metal etc. and protected from damage, and it is also It is securely fixed so that it does not move. Note that the cover 30,
As shown in FIG. 7, the mating surfaces of each of the parts 30 may be alternately formed to further enhance the sealing effect.

Since this embodiment has the above configuration,
Normally when bonnet 2 is closed, cooling fan 1
When outside air is sucked into the bonnet 2 by 8,
At the front lower hinge portion H of the bonnet 2, the gap between the hinge portion H and the front grille 2a is sealed by the cushion material 19 and the gutter member 13, and the cushion material 1
6 is in close contact with the inner wall of the bonnet 2, and the front end of the cushion material 17 is in close contact with the cushion material 16 to seal the intake air from below the lateral side of the bonnet 2,
Further, since the flat portion 13a of the gutter member 13 is in close contact with the front cover 14 to block intake air from below, intake air will not enter from outside through the hinge portion H. Therefore, when the engine 6 is driven and cooling air is sucked into the bonnet 2 by the cooling fan 18, there is no outside air flowing in from the hinge H.
As a result, cooling air is sucked only from the net 5 provided on the front grille 2a at the frontmost end of the bonnet and the net 8 provided on the side of the bonnet. As a result, all of the large amount of dust generated during mower work is removed by the nets 5 and 8, so that the bonnet 2
It is possible to prevent problems such as dust entering the interior with the cooling air and contaminating the interior.

In addition, due to repairs and inspections inside the bonnet 2,
When the bonnet 2 is rotated forward to open the fuselage 4, the cushion material 9 slides on the outer peripheral surface of the gutter member 13 and the cushion material 17 slides around the cylindrical cushion material 16. Since the surface is slid counterclockwise in FIG. 2, the bonnet 2 is rotated smoothly. At this time, since the pin 12 provided on the support member 11 is regulated by the guide portion 10a of the guide member 10, the bonnet 2 is stopped when it has rotated by a predetermined angle.

When the bonnet 2 is returned from the open position to the closed position upon completion of repairs, inspections, etc.,
The bent surface 23a of the wind shield plate 23 is perpendicular to the tangential direction of the circumference whose radius is the distance from the support shaft 3 to the bent surface 23a, and the surface 22a of the cushion material 22
Since the bending surface 23a is perpendicular to the tangential direction of the circle, the bent surface 23a can directly oppose and abut the surface 22a of the cushion material 22, and therefore no shearing force can be applied to the cushion material 22. Since only the force in the compression direction is applied, deformation and peeling can be prevented and durability can be improved.

(G) Effect of the invention As explained above, according to the invention, the gutter-shaped cover member 13 is installed below the hinge H that rotates the bonnet 2, and the gap between the cover member 13 and the bonnet 2 is reduced. , the first, second, and third sealing members 19, 16, and 17 are configured to seal each other, so that the intake air that easily enters from the hinge H is reliably sealed and the intake air is directed only from the net portions 5 and 8. It is possible to reliably prevent straw scraps etc. that are rolled up during take-in and mower work from entering the bonnet 2, and the seal members 16, 17, 19 do not curl up unlike rubber plates etc. , the life of the seal ring structure can be extended and made highly reliable.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the seal ring structure according to the present invention, Fig. 2 is a side view thereof, Fig. 3 is a front view thereof, and Fig. 4 is a partially cutaway view showing the bonnet and the engine inside thereof. A side view, FIG. 5 is a front view showing the battery-integrated part, FIG. 6 is a perspective view showing the seal ring structure using the cover in detail, and FIG. 7 is a side view showing another embodiment of the seal ring using the cover. It is. 1... Mobile agricultural machine (tractor), 2... Bonnet, 4... Airframe, 5, 8... Net section (Net),
6...Engine, 13...Cover member (gutter member),
14... Front cover, 16... Second seal member (cushion material), 17... Third seal member (cushion material), 18... Cooling fan, 19
...First sealing member (cushion material).

Claims (1)

[Scope of claim for utility model registration] The bonnet covering the engine is rotated toward the front of the aircraft by a hinge provided at the lower front of the aircraft.
and through the net provided in the bonnet,
In the mobile agricultural machine that sucks cooling air for cooling the engine, a gutter-like cover member is installed across the machine body to cover the hinge from below, and a first seal is further installed at the front lower part of the bonnet. A member is provided so as to be in close contact with one side of the cover member facing toward the front of the fuselage, and the other side of the cover member facing toward the rear of the fuselage is in close contact with a front cover, etc., and a circle is provided at both ends of the cover member in the lateral direction of the fuselage. A bonnet having a tower-shaped second seal member provided in close contact with the inner wall of the bonnet, and a third seal member provided on the inner wall of the bonnet with one end thereof in close contact with the outer peripheral surface of the second seal member. Sealing structure.