JP3445113B2 - Cooling air distribution structure for running vehicles - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling air circulation structure for a traveling vehicle.

[0002]

2. Description of the Related Art In a traveling vehicle such as a tractor, an engine is mounted in front of a driver's seat, and the bonnet is surrounded by the bonnet that surrounds the engine and various devices attached to the periphery of the engine. Some have an engine room formed inside.

When the traveling vehicle is a tractor or the like, a heavy working machine is often connected to the rear part of the vehicle or a steep step or the like is climbed up and down. Special considerations are needed to achieve a good balance. Generally, it is preferable to set the center of gravity in front of the traveling vehicle. For this reason, it has been attempted to collect various devices and engine accessories in the front of the engine room, and allocate relatively heavy items to the front and conversely light items to the rear (close to the driver's seat). There is.

By the way, in recent years, it has been desired to increase the output of a traveling vehicle, and along with this, there is a tendency that the engine becomes larger. Therefore, not only the above-mentioned restrictions on layout but also a problem that the installation space becomes small in various devices and engine accessories, and the layout in the engine room tends to become more and more complicated.

[0005]

As described above, when the engine room becomes overcrowded and the layout becomes difficult,
In some cases, an engine accessory such as a battery may be installed on the front of the radiator. As a result, it may be difficult to ensure the intake of air into the radiator. This becomes a particularly serious problem when the traveling vehicle is one that does not travel at high speed such as a tractor.

Further, if the cooling capacity of the radiator is required to be increased due to the increase in size of the engine, that is, the size of the radiator is also required to be increased, it is necessary to take in the air more sufficiently. come. The present invention is
In consideration of the above circumstances, even if the engine room becomes overcrowded due to an increase in size of the engine, etc., cooling of the traveling vehicle is ensured so that air can be taken into the radiator reliably and sufficiently. An object is to provide an air circulation structure.

[0007]

In order to achieve the above object, the present invention takes the following technical means. That is, in the cooling air circulation structure for a traveling vehicle according to the present invention, not only is air taken into the radiator via the grill portion provided in the front portion of the bonnet, but also the radiator and the engine auxiliary unit arranged in front of the radiator. Machine (eg battery)
The air is also taken into the radiator from the central space in the width direction of the front axle frame that supports the engine in the engine room via the lower portion of the installation portion of the engine accessory.

With such a structure, sufficient air can be taken into the radiator without the engine auxiliary equipment provided in front of the radiator interfering. The front axle frame may be provided with a pair of left and right front lower side plates at a position that is a front portion of the radiator installation portion, and a pair of left and right rear lower side plates may be provided at a position that is a rear portion of the radiator installation portion. The front and rear lower side plates are both provided with air permeability inside and outside the engine room, so that the front lower side plate functions as an air auxiliary intake part, and the rear lower side plate functions as an air auxiliary discharge part. Will be done.

The front lower side plate is also used to hold the engine auxiliary equipment arranged in the front portion of the radiator at a predetermined height, thereby making effective use of space and members. It is preferable that the front axle frame is provided with a backflow prevention plate at a position rearward of the radiator installation portion. This backflow prevention plate prevents the exhaust flow that has exited the radiator from being blown back forward, and prevents the heat exchange efficiency in the radiator from decreasing.

When the front and rear lower side plates are formed so as to form a part of the exterior together with the bonnet side plate, and the rear lower side plate is arranged so as to be aligned on the rear extension of the front lower side plate, the external appearance is improved. The sense of unity above and the balance as a whole are balanced, and there is no fear of giving a sense of discomfort to those who see this.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is an outer side view of the traveling vehicle 1 to which the cooling air circulation structure according to the present invention is applied. First,
When the traveling vehicle 1 is outlined,
A two-shaft, four-wheel type tractor having front wheels 2 used for steering and auxiliary traveling drive and rear wheels 3 used for main traveling drive, and can be switched to two-wheel drive or four-wheel drive by driving from an engine 5. Has become. A hydraulic device 9 having a lift arm 8 is provided at a rear portion of a vehicle body 6 including the engine 5, a mission (not shown) and the like, and the hydraulic device 9 raises and lowers a three-point link 10. It is possible.

Various working machines 11 (cultivator in the illustrated example) can be connected to or disconnected from the three-point link 10 as required. This working machine 11 has P
The drive of the engine 5 can be transmitted via the TO shaft 12. Above the front axle frame 13 that extends forward from the engine 5, the bonnet is configured to entirely surround the engine 5 and various peripheral devices attached thereto and engine accessories. 14 is provided, and an engine room is formed in the bonnet 14.

A cabin 15 is provided on the vehicle body 6 behind the engine 5.
Inside, a cockpit in which the steering wheel 16 and the driver's seat 17 are arranged is formed. The cabin 15 in the illustrated example is provided with an opening / closing door 18 for getting in and out, and since the cockpit can be a closed space, air conditioning can be controlled by air conditioning equipment (air conditioner).

In such a traveling vehicle 1, as shown in FIGS. 3 to 5, in the engine room, the belt drive unit 21, the radiator 22, and the air-conditioning condenser 23 are directed from the front of the engine 5 to the front thereof. Further, a battery 24 is provided, and a headlight 25, a horn 26, etc. are provided further in front of the battery 23. Further, an air cleaner 27 is provided above the battery 23, and the front surface thereof is the grill portion 2
It is 8.

A controller 30 for power steering is provided on the upper part of the engine 5 near the front part, and slightly to the side of the engine head part.
The handle 16 (see FIG. 2) is connected via the transmission shaft 31. A reserve tank 32 for the radiator 22 is provided at the front of the controller 30. A muffler body 35 is provided above the rear part of the engine 5 via an exhaust guide pipe 34. This muffler body 35
An exhaust pipe 36 is connected to the exhaust pipe 36 and extends forward from the same side surface as the exhaust guide pipe 34 in a bent shape and then rises upward.

The belt drive section 21 is a generator (alternator or dynamo) from the engine output shaft section 38.
39 and a radiator fan 40 having a first belt 41 stretched over the respective input portions, and a second belt 44 stretched from the engine output shaft portion 38 over the input portion of the air conditioning compressor 42 and the tension pulley 43. ing.

The radiator 22 is provided with a fan shroud 46 on the surface facing the engine 5. As shown in FIG. 6, the fan shroud 46 has a structure in which the radiator 22 does not have a rotating space 46 a and the radiator 22 does not have a rotating space 46 a.
Wind tunnel portion 46b that covers the exhaust surface of the
And a flange portion 46c projecting from the periphery of the radiator 22 to the left and right sides of the radiator 22 and upward, and the flange portion 46c.
And a seal member 47 provided on the outer edge portion of the.

The seal member 47 is a tube string-like member made of a soft resin or a soft rubber used as a weather strip in the cabin 15 and the like, and its outer periphery can be brought into contact with the inner surface of the bonnet 14. . Therefore,
In the engine room, air flow, heat transfer, etc. are blocked in the front-rear direction with the fan shroud 46 as a boundary.

Further, as shown in FIG. 3, the insect 22 is detachably attached to the surface of the radiator 22 facing the grill portion 28 via a hooking hook 48. The hook member 48 is provided with a plurality of engaging portions 48a on the front and rear sides so that the hook tool 48 can be re-attached depending on the vehicle type, the size of the insect repellent net 49, and the like. This hook tool 48
In order to increase the stability of the insect repellent net 49, two or more may be provided in the height direction.

This radiator 22 has a front axle frame 1
It is supported by the upper part of 3, but this front axle frame 13
As shown in FIG. 1, a front lower side plate 52 and a rear lower side plate 53, which stand up in a pair on the left and right, are provided at both front and rear positions of the radiator 22 with the installation portion of the radiator 22 interposed therebetween. Among them, the front lower side plate 52 is assembled into a frame shape together with a front plate 55 and a rear plate 56, and a flat plate-shaped battery support 57 for supporting the battery 24 is provided on the upper surface thereof. The overall structure is like a thin box turned inside out. These can be assembled by appropriately combining bolting, welding or bending from a single material plate.

The front lower side plate 52, the front plate 55, the rear plate 56, and the battery support 57 are all made of punching metal, expanded metal, or the like, and are breathable. Therefore, the air flowing in from the front to the rear through the widthwise central space of the front axle frame 13 is supplied to the radiator 22 via the rear plate 56 and the battery support 57, and at this time, at least the front lower side plate 52. Acts as an auxiliary air intake to further improve the intake of air.

The battery support 57 may be one or a plurality of rods extending between the left and right front lower side plates 52, or may be a plate having no air permeability, or may be omitted in some cases. It is also possible to do so. On the other hand, the rear lower side plate 53 is raised obliquely so that the opening angle to the outside of the left and right becomes larger toward the upper side (see FIG. 4). These rear lower side plates 53 are also made of punching metal, expanded metal, or the like, and have air permeability. Therefore, it acts as an auxiliary air discharge portion for discharging the air exhausted from the radiator 22 to the outside.

As shown in FIGS. 4 and 7, a bonnet lower cover 60 is held at the upper ends of the rear lower side plates 53. The bonnet lower cover 60 is also made of punching metal, expanded metal, or the like as the material of the rear lower side plate 53, and has air permeability. Therefore, as a matter of course, the bonnet lower cover 60 is also
It serves as an auxiliary air discharge portion for discharging the air exhausted from the radiator 22 to the outside.

As shown in FIG. 8, this bonnet lower cover 60 can swing open and close its upper end to the left and right through a hinge part 61 provided between the lower lower plate 53 and the upper end of the rear lower side plate 53. Is held. Further, the closed state of the bonnet lower cover 60 is held by the elastic engagement between the locking member 62 provided at the upper end portion thereof and the patchon stopper 63 provided at a proper position in the engine room. There is.

A packing 65 is provided on the outer peripheral portion of the bonnet lower cover 60 so as to frame the bonnet lower cover 60, so that the close contact with the bonnet 14 is enhanced when the cover is closed. The front lower side plate 52 and the rear lower side plate 53 are exposed to the outside and form a part of the exterior together with the side plate of the bonnet 14. The rear lower side plate 53 is arranged on the rear extension of the front lower side plate 52. Because of this, the design of the traveling vehicle 1 as a whole is unified and the appearance is good.

As shown in FIG. 3, the front axle frame 13 is further shielded from the central space in the width direction at a position rearward of the portion where the radiator 22 is installed and forward of the engine 5. A backflow prevention plate 67 is provided which is inclined in a direction in which the side is higher and the rear side is lower. The backflow prevention plate 67 prevents the exhaust flow having heat discharged from the radiator 22 from being reflected by the engine 5 or the like and being blown back forward as it is, or in the state of being further heated at the time of this reflection. belongs to. Therefore, the radiator 22
It is possible to limit the air taken in to the fresh air, and the heat exchange efficiency in the radiator 22 is enhanced accordingly.

The bonnet 14 that surrounds such an engine room has a top plate portion 68 and side plate portions 69 on both left and right sides thereof and is formed in a U-shaped section (see FIGS. 4 and 6). ing. Further, the grill portion 28 is integrally attached to the front end portion of the bonnet 14, and the top plate portion 68 is centered around the swing support portion 70 (see FIG. 3) provided at the upper portion of the rear end portion. This grill part 28 as well as the side plate part 69 is swingable in the vertical direction (see FIG. 2).
(See).

The closed state of the bonnet 14 is held by a lock mechanism 72 provided inside the grill 28, as shown in FIG. The lock mechanism 72 can be operated for lock switching by an operation piece 72a provided on the upper surface of the grill portion 28 so as to project also as a center mascot. By the way, the present invention
The present invention is not limited to the above embodiment.

For example, only the case of the battery 24 has been described as the engine auxiliary machine provided on the front portion of the radiator 22, but it goes without saying that other engine auxiliary machines may be used. The traveling vehicle 1 is not limited to a tractor.

[0030]

As is apparent from the above description, in the cooling air flow structure for a traveling vehicle according to the present invention, the width direction of the front axle frame supporting the radiator and the engine auxiliary equipment such as a battery arranged in front of the radiator. Since air is taken into the radiator from the central space via the lower part of the installation part of the engine accessory, a sufficient amount of air is supplied to the radiator together with the air taken in from the grill part on the front of the bonnet. become. Therefore, there is no problem in installing the engine auxiliary machine in front of the radiator, the layout in the engine room is facilitated, and the engine can be increased in size without difficulty.

By providing front and rear lower side plates to the front and rear of the radiator installation portion with respect to the front axle frame, the front lower side plate serves as an air auxiliary intake portion and the rear lower side plate serves as an air auxiliary discharge portion. And as a result,
The air flow can be further improved. By providing the backflow prevention plate at the rear of the radiator installation portion with respect to the front axle frame, it is possible to prevent the exhaust flow leaving the radiator from being blown back toward the front, so that the heat exchange efficiency of the radiator can be favorably maintained.

When the front and rear lower side plates are formed so as to form a part of the exterior together with the bonnet side plate, and the rear lower side plate is arranged so as to be aligned on the rear extension of the front lower side plate, the appearance is reduced. The sense of unity above and the balance as a whole are balanced, and there is no fear of giving a sense of discomfort to those who see this.

[Brief description of drawings]

FIG. 1 is a partially exploded perspective view of a cooling air circulation structure according to the present invention.

FIG. 2 is an outer side view of a traveling vehicle to which the cooling air circulation structure according to the present invention is applied.

3 is an enlarged side view showing the inside of the bonnet shown in FIG. 2 (inside the engine room).

FIG. 4 is an enlarged sectional view taken along line AA of FIG.

5 is an enlarged plan view corresponding to FIG.

6 is an enlarged cross-sectional view taken along line BB of FIG.

FIG. 7 is a side view showing a part (around the hood) of FIG. 2 in an enlarged manner.

8 is an enlarged cross-sectional view taken along the line CC of FIG.

[Explanation of symbols]

1 traveling vehicle 13 front axle frame 14 Bonnet 22 radiator 24 Battery (engine accessory) 28 Grill part 52 Front lower side plate 53 Rear lower side plate 67 Backflow prevention plate 69 side plate

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-8-99539 (JP, A) Actual development Sho 63-43826 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B60K 11/04

Claims (4)

(57) [Claims] 1. A grill part (28) is provided on a front part of a bonnet (14) surrounding an engine room so that air can be taken into a radiator (22) in the engine room, and a radiator (22). And an engine accessory (2) arranged in front of the radiator (22).
4) supporting the front axle frame (1) in the engine room
The engine accessory (24) is also seen from the central space in the width direction of 3).
Cooling air flow of a traveling vehicle in which air can be taken into the radiator (22) via the lower part of the installation part of the vehicle
In the through structure, the front axle frame (13) includes a radiator (22).
The engine accessory (24) has a predetermined height in front of the installation part.
Left and right front lower side plates (5
2) is provided, and the front lower side plate (52) is
Air-assisted intake with ventilation inside and outside the engine room
A cooling air circulation structure for a traveling vehicle, characterized in that it is formed as a part . The method according to claim 2, wherein the front axle frame (13), La di <br/> eta (22) a pair of right and left rear lower side plate that rises at the rear (53) is provided from the installation portion, the rear lower side plates (53) comprises a breathable by Gae Njinrumu out
Cooling air circulation structure for traveling vehicle according to claim 1, characterized in that it is formed as air assist ejection portion Te. 3. The backflow prevention plate for the front axle frame (13), which can prevent the exhaust flow leaving the radiator (22) from being blown back forward from the radiator (22) installation part to the rear part. (67) is provided, The cooling air circulation structure of the traveling vehicle of Claim 1 or Claim 2 characterized by the above-mentioned. 4. The front and rear lower side plates (52, 53),
Both are formed as a part of the exterior together with the side plate (69) of the bonnet (14), and the rear lower side plate (53) is arranged on the rear extension of the front lower side plate (52). The cooling air circulation structure for a traveling vehicle according to any one of claims 1 to 3 .