JPH10258643A - Baffle device for tractor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase heat exchanging rate of a radiator and to prevent whirling after heat exchanging by providing an outside air introduction port from below on a frame of a front axle on the front side of the radiator and furnishing an air introduction member to guide discharge air toward an engine by preventing whirling of air after heat exchanging, etc. SOLUTION: A separate outside air introduction port 22 to introduce outside air from below is provided on a front axle frame 11 on the front side of a radiator 5, and it is possible to introduce outside air C through this introduction port 22. The outside air introduction port 22 is formed of a punching metal plate having a large number of through holes on a support plate 15. Outside air C, D is introduced from the outside air introduction ports 22, 24 to reduce quantity of floating impurities and to reduce blinding of an insect net. Additionally, an air introduction member 27 is provided by connecting left and right side plates 8 of the front axle frame 11 to restrain whirling of heat exchanged air to the front of a core part 19. Consequently, it is possible to maintain a heat exchanging rate of the radiator favorable and to prevent whirling after heat exchanging.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tractor air guide device, and more particularly to a tractor air guide device for improving the heat exchange efficiency of a radiator provided in front of an engine.

[0002]

2. Description of the Related Art Conventionally, as a tractor air guide device, an engine is covered with a bonnet having an outside air inlet on a front grille portion, and a front axle frame constituted by left and right side plates is provided so as to protrude forward from the engine. A radiator covered with a bonnet and having a suction-type fan is provided on the front axle frame at a position in front of the engine, and the fan drives the outside air from the outside air introduction port to exchange heat with the radiator and exchange heat. There is known a technology in which air is exhausted toward an engine.

[0003]

When working with various working machines mounted on a tractor, firgrass, plant seeds, insects, and other contaminants are sucked in with the outside air, and are provided at the outside air inlet and the front of the radiator. Insect repellent nets may be blocked, causing the engine to overheat. For this reason, although insect repellent nets and the like are cleaned or replaced regularly or as needed, there is a problem in that it is very troublesome and the work is interrupted.

Another problem is that the wind that has undergone heat exchange after passing through the radiator hits the front wall of the engine and rebounds, and when passing through the radiator with fresh air, the heat exchange rate by the radiator deteriorates. Further, the conventional outside air introduction port is provided in a front grill portion of the bonnet, a side plate portion of the bonnet, and the like. The bonnet forms an engine room, and when working in a dense area of plants and crops, the outside air introduction port is provided. The mouth was readily clogged with airborne contaminants, which reduced the heat exchange rate of the radiator.

[0005] Therefore, the present invention provides an outside air introduction port on the front axle frame, which has relatively little airborne contaminants, to ensure the intake of fresh air (wind guide), promote the heat exchange rate of the radiator, and improve the radiator. It is an object of the present invention to reduce the overheating of the engine by suppressing the rebound (wraparound) of the wind (so-called hot wind) that has passed through and heat exchange, so that the work can be performed lightly and quickly.

[0006]

According to the present invention, the engine 4 is covered by a bonnet 6 having an outside air inlet 6E in a front grill 6C, and a front axle frame 11 composed of left and right side plates 8 is moved forward from the engine 4. A radiator 5 provided in a protruding shape and covered with the hood 6 and having a suction type fan 16 is provided on the front axle frame 11 at a position in front of the engine 4, and is driven by the fan 16 from the outside air inlet 6 E. In order to achieve the above object, the following technical configuration is employed in a tractor air guide device that exchanges heat with the radiator 5 and exhausts the heat-exchanged wind toward the engine 4.

That is, in the present invention, the front axle frame 11 on the front side of the radiator 5 is provided with another outside air inlet 23 for introducing outside air from below, and prevents the heat exchanged wind from flowing forward. And a wind guide member 27 for guiding the exhaust air toward the engine 4 by connecting the left and right side plates 8 of the front axle frame 11.

By adopting such a configuration,
During the traveling operation with the tractor T, the outside air (fresh air) is driven by the fan 16 and the outside air inlet 6E of the front grille portion 6C shown in FIG.
When passing through the core portion 19 of the radiator 5, heat is exchanged. At this time, fresh air taken in (directed) from another outside air introduction port 22 provided in the front axle frame 11 is such that floating foreign matters are generated with respect to the fresh air from the outside air introduction port 6E formed in the front grill portion 6C. Less.

That is, external air is guided from below the engine room 7 formed by the bonnet 6, so that heat exchange of the radiator 5 is ensured, and thus overheating of the engine 4 is reliably prevented. In addition, the wind that has undergone heat exchange through the core 19 of the radiator 5 rebounds at the front of the engine 4 and tries to move forward.
The air guide member 27 prevents the air from wrapping around and mixes with the fresh air at a low rate, which also improves the heat exchange rate of the radiator 5.

Further, the air guide member 27 is provided on the front axle frame 11.
By connecting the left and right side plates 8 of the
The rigidity of No. 1 is improved, and there is no torsional deformation or the like, and the rigidity is improved. When the front axle frame 11 is made of sheet metal to reduce the weight, the rigidity improvement by the wind guide member 27 is particularly significant.

When the front axle frame 11 is made of a casting, the breakage and the like of the front axle frame 11 are effectively prevented.
Further, in the present invention, a support plate 15 for connecting the left and right side plates 8 of the front axle frame 11 and mounting the radiator 5 is provided, and the support plate 15 is provided with the another outside air inlet 22 and the inlet 22.
By adopting a configuration in which the outside air inlet 24 is provided in parallel with the above, the intake of fresh air (outside air) from below the engine room 7 can be improved, and the heat exchange rate of the radiator 5 can be more reliably increased. This means that the opening ratio of the outside air inlet 6E formed in the front grille 6C can be reduced, and as a result, not only the rigidity of the front grille 6C can be improved, but also the design is improved and the commercial value is improved. .

Further, in the present invention, a configuration is adopted in which the support plate 15 on which the radiator 5 is mounted has a step mounting portion 28 on which the lower tank 18 of the radiator 5 can be mounted in a downwardly downward shape. This prevents the front portion of the lower tank 18 in the radiator 5 from becoming a dead wind portion or generating turbulent wind when taking in fresh air from below the engine room 7, and as a result, heat exchange of the radiator 5 is prevented. The efficiency can be improved, and the step mounting portion 28 not only makes accurate positioning of the radiator 5 forward, but also improves the work of assembling the radiator 5.

Further, in the present invention, the air guide member 27 is provided on the support plate 1.
5 is a plate member provided integrally with or separately from the radiator 5 and adopting a configuration in which the exhaust guide surface 27A is inclined backward and downward, thereby guiding the wind passing through the core portion 19 of the radiator 5. Can be moved downward, which can remove foreign substances adhering to the front wheel propulsion shaft device 14 and prevent the mud and the like from entering the engine room 7.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 5 shows a tractor T to which the wind guide device according to the present invention is applied.
A two-axle, four-wheel type having left and right front wheels 1 and left and right rear wheels 2. An engine 4 is mounted on a vehicle body 3, and a hood 6 surrounding (covering) the engine 4 and the radiator 5.
Is the left and right lower plate portions 6A to form the engine room 7.
Plate part 6D having an upper plate part 6B and a front grille part 6C
The upper plate 6B is vertically movable about its rear fulcrum so that the engine or the like can be inspected, and the front plate 6D is tiltable in the front-rear direction but is detachable.

Referring to FIGS. 1 and 2, the engine 4
At the lower left and right sides, sheet metal side plates 8 are fixed by fasteners 9 such as bolts so as to protrude forward on a horizontal plane, and the front ends of the left and right side plates 8 are connected by a sheet metal front plate 10. Constitute a frame-shaped front axle frame 11 having a vertical opening. A front axle bearing stand 12 is attached to the lower surface side of the front axle frame 11, and a front axle (front axle case) is attached to the receiving stand 12 via a center pin 13A.
13 is suspended, and in the figure, the propulsion shaft device 14 is a front wheel drive that transmits a front wheel drive system having a differential. However, it is needless to say that the present invention can be applied to front wheel non-drive.

The front wheel bearing pedestal 12 has this attachment portion in the upper concave portion 1.
1A, the ground clearance is secured. The front plate 10 of the front axle frame 11 has a front weight (not shown) to which a front weight can be attached and a front pitch device and the like. A support plate 15 is attached to the front axle frame 11 with fasteners such as a plurality of bolts, and reference numeral 15A in FIG. 2 is a bolt insertion hole.

In the figure, a support plate 15 is overlapped as a cover on the left and right side plates 8 and the front plate 10 at the front side of the front axle frame 11 and attached with a plurality of fasteners.
A radiator 5 is mounted on a rear portion of the radiator 5 with an anti-vibration fastener having an anti-vibration rubber or the like, and the radiator 5 covered with a hood 6 and having a suction type fan 16 is mounted on a front axle of the engine 4. It is provided on the frame 11.

The radiator 5 has a core portion 19 between an upper tank 17 having a water supply port 17A and a lower tank 18, and has a baffle tube 20 on a rear surface of the core portion 19;
6 drives the outside air to flow through the core portion 19 to exchange heat with water flowing through the pipe of the core portion 19 through a large number of fins and the like.
Is discharged, and the hot water is subjected to heat exchange and is conducted to the engine 4 via a pipe connected to the lower tank 18.

The fan 16 is connected to a front output shaft (P
It is driven through a wrapping transmission device 21 such as a belt transmitted by a (TO shaft), and faces behind the core portion 19. An outside air inlet 6E is formed in the front grill portion 6C of the bonnet 6, and the outside air is introduced into the engine room 7 as indicated by arrow A by driving the fan 16, and the core portion 19 is formed.
The wind (hot air) that has undergone heat exchange passes through the engine 4 and collides with the front surface of the engine 4 and is introduced into the upper portion and both side walls of the engine 4 as shown by the arrow B.

Although the outside air inlet 6E is formed in the shape of an armor plate in the figure, it may have a large number of through-holes. Although not shown, the outside air inlet 16 and the core 19 are detachable. Alternatively, a drawer-type insect repellent net is provided, and a common wind elastic body such as a substantially gate-shaped sponge is interposed between the outer peripheral portion of the radiator 5 and the inner peripheral surface of the bonnet 6, so that the engine room 7 The outside air is guided so as to be conducted to the core portion 19.

Intake of outside air only from the outside air inlet 6E involves a lot of floating impurities such as seeds and insects, and the outside air intake efficiency is deteriorated.
A front outside axle frame 11 is provided with another outside air introduction port 22 for introducing outside air from below, and outside air can be introduced through this introduction port 22 as shown by arrow C.

In the drawing, as shown in FIG.
The outside air inlet 22 is formed by welding or the like a punching metal plate 23 having a large number of through holes 23A, and a punching metal plate 23 having a large number of through holes 23A juxtaposed before and after the outside air inlet 22. Are formed by welding or the like. The entire support plate 15 may be formed of a punched metal plate.
The plates 2 and 24 may be formed in a lattice shape other than the punched metal plate 23, and may be detachably attached by bolts or the like without welding.

An engine auxiliary device 25 such as a battery is removably mounted on the support plate 15 on the outside air inlet 24. By mounting the engine auxiliary device 24 with an intervening plate 26 interposed, The outside air indicated by arrow D from the inlet 24 is supplied to the auxiliary device 25.
, So that the outside air can be introduced through the space between the intervening plates 26. The intervening plate 26
May be made of a thick metal plate such as an iron plate.
In order to improve the anti-vibration performance and ensure durability, a rubber plate,
It is desirable to use a plastic plate or the like, and it is also possible to use not a plate material but an inclusion made of a tubular collar in the attachment portion.

The reason why the outside air is introduced from the outside air inlets 22 and 24 as shown by arrows C and D is that the amount of suspended impurities is small and clogging of the insect repellent net can be reduced. Further, when the wind that has been taken in as indicated by arrows A, C, and D and passed through the core portion 19 by the driving (starting) of the fan 16 and is heat-exchanged is exhausted as indicated by arrow B, the front of the engine 4 May be rebounded and run around the core portion 19, which is disadvantageous in terms of heat exchange.

Therefore, the left and right side plates 8 of the front axle frame 11
And a wind guide member 27 is provided.
The front axle frame 11 connects the side plates 8 to each other.
In addition to improving the rigidity of the propulsion shaft, the exhaust air guide surface 27A is inclined rearward and downward, so that the exhaust air E blows away straw and the like that are to adhere to the propulsion shaft device 14, thereby contributing to reducing the adhesion. At the same time, the exhaust air E prevents muddy water and the like from entering the engine room 7.

When the air guide member 27 is made of a metal plate, it is advantageous to weld it to the side plate 8 in terms of improving rigidity, but it may be attached to the side plate 8 with bolts or the like. Instead, it may be made of a hard resin plate (preferably a Teflon-processed or fluoresced-processed one from the viewpoint of preventing mud adhesion). FIGS. 3 and 4 show another useful embodiment of the present invention, in which portions common to the above-described configuration and operation are denoted by common reference numerals, and hereinafter, only different configurations and operations will be described. explain.

The mounting portion of the radiator 5 on the support plate 15 is formed as a step mounting portion 28.
The lower tank 18 is mounted on the lower tank 1
8, the outside air indicated by arrow C is prevented from turbulently flowing in the front surface of the apparatus 8, and the introduction of outside air is ensured. In addition, the step mounting portion 28 ensures the front positioning of the radiator 5 on the step standing surface 28A, thereby facilitating the mounting of the radiator 5.

Further, the air guide member 27 is integrally connected to the step mounting portion 28, but may be formed separately. FIGS. 6 and 7 show the configuration of the hood 6. The upper plate 6B of the bonnet 6 is rotatable around a fulcrum 6F,
Maintenance of the engine and the like is performed while the open state is maintained by the support 6G.

At this time, when the exhaust pipe 6J of the engine muffler 6H projects from the upper plate 6B, the upper plate 6B
The insertion window 6K of the exhaust pipe 6J has a long hole shape in order to allow the rotation of the exhaust pipe 6J. However, there is a gap between the exhaust pipe 6J and the window 6K, and foreign matter such as rainwater and straw chips may enter the engine room from this gap.

Therefore, an umbrella or eaves-shaped cover 6L large enough to fill most of the gap is provided in the exhaust pipe 6J when the upper plate 6B is closed. The opening and closing of 6B does not hinder and prevents intrusion from the gap. 8 to 1
0 indicates that the differential device 30 is built in the front axle case 13;
The structure which operates the lock means 31 of the differential device 30 is shown.

The locking means 31 has a rotatable lock lever 32, and the lock lever 32 and the pedal 33 are normally connected by a link mechanism. In the link mechanism, play is accumulated because the distance between the pedal 33 and the lock lever 32 is long, and interference with other objects increases due to the complexity of the mechanism. Therefore, the pedal 33 and the lock lever 32
Are linked by a cable 34 having an inner wire 34A and an outer wire 34B so that the pulling operation of the inner wire 34A or the pressing operation of the outer wire 34B enables the lock lever 32 to be operated in the direction of locking the differential device 30. When a spring 35 is interposed in the middle of the cable 34 as shown in FIG. 10, the time lag when the tech lock is turned on and off can be absorbed by the elastic force of the spring 35.

[0032]

As described above in detail, according to the present invention, since the amount of suspended matter in the fresh air (outside air) is small, the heat exchange rate of the radiator can be kept good, and the wind around the heat-exchanged wind can be maintained. This prevents muddy water from entering the engine room or the like due to the wind.

[Brief description of the drawings]

FIG. 1 is a side view according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of a main part of FIG.

FIG. 3 is an exploded perspective view according to a second embodiment of the present invention.

FIG. 4 is a side view of a main part of FIG. 3;

FIG. 5 is a side view of the tractor.

FIG. 6 is a perspective view of a bonnet.

FIG. 7 is an operation diagram of FIG. 6;

FIG. 8 is a conceptual diagram of a differential lock operation system.

FIG. 9 is a conceptual diagram of a differential lock operation system.

FIG. 10 is a conceptual diagram of a differential lock operation system.

[Explanation of symbols]

 Reference Signs List 4 engine 5 radiator 6 bonnet 8 side plate 11 front axle frame 22 outside air inlet 27 wind guide member

Claims (4)

[Claims] An outside air inlet (6) is provided in a front grill portion (6C).
E) The engine (4) is covered by a bonnet (6) having a front axle frame (11) composed of left and right side plates (8) is provided so as to protrude forward from the engine (4). Fan (1)
A radiator (5) having a radiator (6) is provided on the front axle frame (11) at a position in front of the engine (4), and the radiator (5) drives the fan (16) to drive the outside air from the outside air inlet (6E). In the tractor air guide device for exchanging heat and the heat exchanged wind toward the engine (4), outside air is introduced from below into the front axle frame (11) in front of the radiator (5). And a wind guide member (27) for preventing the heat-exchanged wind from wrapping forward and guiding the exhaust air toward the engine (4), by using a front axle frame (11). ), Wherein the left and right side plates (8) are connected to each other. 2. A support plate (15) for connecting a left and a right side plate (8) of a front axle frame (11) and mounting a radiator (5) thereon, and the another outside air is introduced to the support plate (15). 2. The tractor air guide device according to claim 1, wherein an outside air inlet (24) is provided in parallel with the inlet (22) and the inlet (22). 3. A support plate (1) on which a radiator (5) is mounted.
3. The tractor guide according to claim 2, wherein the step (5) is provided with a step mounting portion (28) on which the lower tank (18) of the radiator (5) can be mounted in a downwardly downward shape. Wind equipment. 4. The air guide member (27) is a plate member provided integrally with or separately from the support plate (15), and the exhaust guide surface (27A) is inclined backward and downward. The tractor wind guide device according to any one of claims 1 to 3.