WO2004099581A1

WO2004099581A1 - Cooling device of working vehicle

Info

Publication number: WO2004099581A1
Application number: PCT/JP2004/006025
Authority: WO
Inventors: Kazuo Ishida
Original assignee: Tcm Corporation
Priority date: 2003-05-08
Filing date: 2004-05-07
Publication date: 2004-11-18
Also published as: JP4233566B2; JPWO2004099581A1

Abstract

A cooling device of a working vehicle allowing the easy cleaning of a radiator, manufacturable in a rather simple structure at low cost, and installed in the engine room of the working vehicle, comprising the radiator for cooling the cooling water which cooled an engine, hydraulic oil cooler disposed parallel with the radiator in the longitudinal direction and cooling hydraulic oil, a connecting frame body, a cooling fan, and right and left side covers. The connecting frame body connects the radiator to the hydraulic oil cooler at a specified interval, its upper and lower sides are closed, and openings for cleaning operation are formed in the right and left side- parts. A cooling fan device feeds cool air to the radiator and the hydraulic oil cooler. The right and left side-covers are openably fitted onto both the right and left sides of the engine room at positions corresponding to the openings for cleaning operation in the connecting frame body.

Description

Specification

Work vehicle cooling system

Technical field

The present invention is applied to a work vehicle cooling device, for example, a work vehicle such as a wheel loader, and particularly relates to an improvement in a cooling device of a type in which a cooling fan is driven by a drive source different from an engine.

^ Scenic technology

Conventionally, as a cooling device applied to a working vehicle such as a wheel loader, for example, a cooling device described in Patent Documents 13 is known.

Patent Document 1 discloses an arrangement in which a radiator and an oil cooler are arranged at an interval, and a common outer peripheral plate is provided so as to cover the outer periphery of the radiator and an oil cooler, and a part of the outer peripheral plate (a portion corresponding to the distance between the radiator and the oil cooler) ) Has an opening. The opening is covered by a top cover plate and side cover plates that can be opened and closed. When cleaning the radiator, etc., open these cover plates.

Patent Document 2 discloses a configuration in which a radiator is detachably connected to an oil cooler and a fan shroud so that the radiator can be pulled out upward to facilitate cleaning of the oil cooler and the radiator. Being done.

In the case of Patent Document 3, the left and right side covers constituting the engine nome are configured to be freely opened and closed. When cleaning the radiator, after opening the side cover, rotate the oil cooler with respect to the radiator, or open the radiator mask and then install the fan support frame and the cooling fan attached to it. Then, with the motor rotated, clean the radiator and oil cooler.

Patent Document 1: Japanese Utility Model Publication No. 64-36523

Patent Document 2: Japanese Patent Application Laid-Open No. 11-123940

Patent Document 3: Japanese Patent Application Laid-Open No. 2000-62474 However, in the device described in Patent Document 1, an outer peripheral plate is provided on the outer periphery of a radiator and an oil cooler so that airtightness can be secured between them, and the outer periphery is provided. Top cover plate and side cover plate for cleaning on board Need to be provided. Further, in the device of Patent Document 2, it is necessary to pull out the radiator upward when cleaning the radiator. Further, in the device of Patent Document 3, it is necessary to rotate the oil cooler with respect to the radiator after opening the side cover, or to rotate the fan support frame, the cooling fan, and the motor after opening the radiator mask. . Therefore, these conventional devices have the drawback that the cleaning is troublesome, the structure is complicated and the cost is high.

Disclosure of the invention

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cooling device for a working vehicle that can easily clean a radiator and the like, has a relatively simple structure, and does not require cost.

A cooling device for a work vehicle according to the present invention is a cooling device provided in an engine room of a work vehicle, and includes a radiator that cools cooling water that cools an engine, and a hydraulic oil that is arranged side by side with the radiator in the front-rear direction to cool hydraulic oil. The cooling oil cooler, the connection frame, the cooling fan, and the left and right side covers are provided. The connecting frame connects the radiator and the hydraulic oil cooler at a predetermined interval, is closed at the top and bottom, and has cleaning openings on the left and right sides. The cooling fan device sends cooling air to the radiator and the hydraulic oil cooler. The left and right side covers are provided on the left and right sides of the engine compartment at positions corresponding to the cleaning work opening of the connecting frame so as to be openable and closable.

In this device, the cooling air is sent to the radiator and the hydraulic oil cooler by the cooling fan device, and the cooling water and the hydraulic oil are cooled.

When cleaning the radiator, etc., opening the left and right side covers exposes the cleaning work opening of the connection frame, and can use this opening to clean the radiator and hydraulic oil cooler. .

It is preferable that the left and right side covers further include a seal member on the inner side surface for closing the cleaning work opening of the connection frame in the closed state. In this case, by closing the left and right side covers, a highly airtight duct is formed, and the cooling efficiency is increased.

As described above, the radiator and the hydraulic oil cooler are connected to each other with a predetermined gap by the connection frame, and the opening force for cleaning work is provided on the left and right sides of the connection frame. Have been. Therefore, the surface (first surface) of the radiator on the hydraulic oil cooler side can be cleaned through the cleaning work opening. However, if a cooling fan device is provided on the opposite side of the radiator from the hydraulic oil cooler, it is difficult to clean the surface (second surface) of the radiator on the opposite side from the above due to the cooling fan device. .

Therefore, when the cooling fan device is disposed on the opposite side of the hydraulic oil cooler with the radiator interposed therebetween, the cooling fan device is further provided and a radiator grille supported to be openable and closable with respect to the engine room is further provided. I like it,

In this case, by opening the radiator grill, the cooling fan device mounted on the radiator grill is similarly opened, and the cooling fan device is separated from the second surface of the radiator. Therefore, the second surface of the radiator can be easily cleaned.

The engine compartment is divided into a front compartment on the front side and a rear compartment on the rear side by a partition, the radiator and hydraulic oil cooler are provided in the rear compartment, and the cooling fan device is provided on the rear side of the radiator. Preferred. It is preferable that the left and right side covers are formed on both left and right sides of the rear chamber, and the air inlet is formed, and the radiator grille is formed with an air outlet.

In this case, when the cooling fan device is driven, the outside air is introduced into the engine chamber from the intake port of the side cover, cools the radiator and the hydraulic oil cooler, and is discharged from the exhaust port of the radiator grill.

Preferably, the hydraulic oil cooler is provided on one of the upper and lower sides of the front side of the radiator, and further includes an intercooler provided on one of the upper and lower sides of the front side of the radiator.

BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a longitudinal sectional side view showing an outline of a cooling device of the present invention.

FIG. 2 is a cross-sectional plan view of FIG. 1.

FIG. 3 is an exploded perspective view showing an outline of a main part.

BEST MODE FOR CARRYING OUT THE INVENTION

[0005] [First embodiment]

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a vertical sectional side view showing an outline of a cooling device of the present invention. Figure 2 is a cross-sectional plan view of Figure 1. FIG. 3 is an exploded perspective view showing an outline of a main part.

This cooling device 1 is applied to a work vehicle 50 such as a wheel loader. The work vehicle 50 includes a vehicle body 51, front and rear wheels (not shown) rotatably provided on the vehicle body 51, a driver's cab provided on an upper front side of the vehicle body, and a front side of the vehicle body 51. It has working equipment.

The cooling device 1 is mainly disposed behind the engine room 2 in which the engine 3 is disposed, and includes a radiator 4, a cooling fan 5 and a fan motor 6 constituting a cooling fan device, an intercooler 7, and a hydraulic oil cooler. 8, left and right air inlet panels 9, radiator grille 10, connecting frame 11, seal 12

In this example, the engine room 2 is formed on the rear side of the vehicle body 51 of the work vehicle 50. The engine compartment 2 includes left and right side panels 16 constituting a vehicle body 51, an upper bonnet 17, a lower under cover 18, a rear radiator grille 10, and a radiator grille 1. It is surrounded by a counterweight 19 provided below 0, and divided into front and rear by a partition 13 (the left is the front and the right is the rear in Figs. 1 and 2), and the front room 14 and the rear room 15 and. The engine 3 is provided in a front room 14 of the engine room 2. In this example, the engine 3 is a diesel engine provided with a supercharger, and rotationally drives wheels of the work vehicle 50 and hydraulic devices.

The radiator 4 is provided in the rear room 15 of the engine room 2. In this example, the radiator 4 is detachably attached to a frame (not shown) of the vehicle body 51, is connected to the engine 3 by a cooling water pipe, and circulates the cooling water to the engine 3. It is cooling down.

A shroud 20 for guiding the cooling air to the cooling fan 5 is arranged on the rear side of the radiator 4, and the shroud 20 is attached to a front side inside the radiator grill 10. The cooling fan 5 is provided on the rear side of the radiator 4, and is an axial fan that sends cooling air to the radiator 4 in this example. The fan motor 6 is provided behind the cooling fan 5.

In this example, the hydraulic motor 6 rotationally drives the cooling fan 5, and the Attached to the radiator grill 10 together with the shroud 20 on the front side inside the eta grill 10.

The intercooler 7 is provided on one of the upper and lower sides of the front of the radiator 4 (in this example, on the upper front side of the radiator 4), and cools the compressed air supplied to the engine 3.

The hydraulic oil cooler 8 is provided adjacent to the intercooler 7 on the other side of the front side of the radiator 4 (in this example, the lower front side of the radiator 4), and prevents the temperature of hydraulic oil of hydraulic equipment from rising. It is for.

A space is formed between the intercooler 7 and the hydraulic oil cooler 8 and the partition wall 13 to circumvent the outside air flowing into the rear chamber 15 of the engine room 2.

The left and right intake port panels (side covers) 9 are provided in the front half of side panels 16 located on the left and right sides of the rear chamber 15 of the engine compartment 2, and the front half of each side is provided with outside air in the rear chamber 15. An inlet 21 for introduction is formed. The left and right intake port panels 9 are supported by hinges 22 so that their rear edges are rotatable around the longitudinal axis, and can be opened and closed. In addition, a stopper (not shown) is provided on the front side of each intake port panel 9, and the stopper can be retained on the side panel 16 side to maintain the closed position.

In addition, the hood 17 and the under cover 18 are provided with an intake port 21 at a position located in front of the rear chamber 15.

The radiator grille 10 is provided on the rear side of the rear room 15 of the engine room 2, and has an exhaust port 23 formed on the rear surface thereof to lead the air in the rear room 15 to the outside. The radiator grille 10 is provided with a hinge 24 at a right end thereof, is supported so as to be rotatable around a vertical axis, and can be opened and closed. Further, a stopper (not shown) is provided on the left side, and by locking the stopper on the main body side, the radiator grille 10 can be locked in the closed position.

The connection frame 11 is provided between the intercooler 7 and the hydraulic oil cooler 8 and the radiator 4, and connects the intercooler 7 and the hydraulic oil cooler 8 to the radiator 4 at a predetermined interval. The connection frame 11 is closed at the top and bottom, and has an opening for cleaning work on the left and right sides. Specifically, as shown in Fig. 3, an opening penetrating in the left-right direction It comprises a vertically long left and right four frame body 26 provided with a top 25 and upper and lower covers 27 connecting these upper parts and lower parts together, and also serves as a so-called duct for passing cooling air. The height of the connecting frame 11 and the length of the connecting frame 11 are substantially the same as that of the radiator 4 so as to surround the cooler core. The size is large enough to clean the rear side.

A suitable number of bolt holes 28 are drilled in the connection frame 11, and the radiator 4 can be used on the rear side, and the intercooler 7 and hydraulic oil cooler 8 can be attached and removed on the front side in an airtight manner. It is attached to.

The screen body 12 is provided on the intake panel 9, closes the opening 25 of the connecting frame 11 when the intake panel 9 is closed, and closes the opening 25 of the connecting frame 11 when the intake panel 9 is opened. Can be released. The seal body 12 is made of a cushion material such as rubber or sponge, and has a size and a predetermined thickness to close the opening 25 of the connecting frame body 11 and is provided inside the rear half of the intake port panel 9. I have.

Next, the operation will be described based on such a configuration.

When the fan motor 6 is driven, the cooling fan 5 is rotated accordingly. When the cooling fan 5 is rotated, the outside air flows into the intake panel 9, the hood 17, and the intake port 21 of the under cover 18 → the rear chamber 15 of the engine room 2 → the intercooler 7 and the hydraulic oil cooler 8 → the coupling frame 11 → the rage 4 → Shroud 20 → Cooling fan 5 → Fan motor 6 → Exhaust outlet 23 of the radiator grille 10 and discharged to the rear of the work vehicle 50. At this time, since the intake port panel 9 is closed as shown in the upper half of FIG. 2, the opening 25 of the connecting frame 11 is closed by the seal 12. This prevents the cooling air from leaking from the connection frame 11 as a duct through the opening 25. Therefore, the intercooler 7, the hydraulic oil cooler 8, and the radiator 4 are efficiently cooled by the cooling air.

When cleaning the radiator 4, etc., rotate the intake port panel 9 in the direction of the arrow shown in the lower half of FIG. 2 to open it, and rotate the radiator grill 10 as shown by the chain line in FIG. open.

When the air inlet panel 9 is opened, the sheet body 12 rotates together with the air inlet panel 9, and the opening 25 of the connecting frame 11 is opened. Therefore, clean the front of the intercooler 7 and hydraulic oil cooler 8 At the same time, the front surface of the radiator 4, the rear surface of the intercooler 7, and the rear surface of the hydraulic oil cooler 8 can be cleaned from the opening 25 of the connection frame 11.

In addition, when the radiator tag 10 is opened, the cooling fan 5, the fan motor 6, and the shroud 20 are rotated together with the radiator grille 10, so that the rear surface of the radiator 4 is opened and the rear surface can be cleaned.

Since the intercooler 7, the hydraulic oil cooler 8 and the radiator 4 are connected by the connecting frame 11, they can be united, and their production and mounting on the work vehicle 50 are facilitated.

Since the seal body 12 is attached to the air inlet panel 9 which can be opened and closed, the structure without the necessity of providing a dedicated open / close cover is simplified, and the cost can be reduced.

The cooling fan 5, the fan motor 6, and the shroud 20 are mounted on the radiator grill 10 which can be opened and closed, so that a dedicated fan support frame or the like is not required, and the structure is simplified and cost is reduced. Reduction can be achieved.

The intercooler 7, the hydraulic oil cooler 8 and the radiator 4 are connected by the connection frame 11, so that damage due to the movement can be prevented as compared with the case where one of them is moved. .

[Other embodiments]

(a) In the above example, the intercooler 7 and the hydraulic oil cooler 8 have the intercooler 7 at the top and the hydraulic oil cooler 8 at the bottom. However, the present invention is not limited to this.

(b) In the above-described example, the present invention can be similarly applied to the case where the cooling fan is disposed between the radiator and the engine, in which the cooling fan is disposed behind the radiator.

Claims

The scope of the claims

[1] A cooling device provided in an engine room of a work vehicle,

A radiator that cools the cooling water that cools the engine,

A hydraulic oil cooler that is arranged side by side with the radiator in the front-rear direction and cools hydraulic oil;

A connection frame body that connects the radiator and the hydraulic oil cooler at a predetermined interval, is closed at the top and bottom, and has cleaning openings on left and right sides;

A cooling fan device for sending cooling air to the radiator and the hydraulic oil cooler;

Left and right side covers that are openably and closably provided at positions corresponding to the cleaning work opening of the connection frame body on both right and left sides of the engine room,

A cooling device for a working vehicle comprising:

2. The cooling system for a work vehicle according to claim 1, wherein the left and right side covers further include a seal body on an inner surface that closes a cleaning work opening of the connection frame in a closed state.

[3] The cooling fan device is disposed on the opposite side of the hydraulic oil cooler with the radiator interposed therebetween,

The cooling fan device is mounted, and further includes a radiator grill supported to be openable and closable with respect to the engine compartment.

The cooling device for a work vehicle according to claim 1.

[4] The engine chamber is partitioned by a partition into a front-side front chamber and a rear-side rear chamber, and the radiator and the hydraulic oil cooler are provided in the rear chamber;

The cooling fan device is provided on the rear side of the radiator,

The left and right side covers are formed on the left and right sides of the rear chamber, and an air inlet is formed,

The radiator grille has an exhaust port formed therein.

The cooling device for a working vehicle according to claim 3. [5] The hydraulic oil cooler is provided on one of the upper and lower sides and the front of the radiator, and is further provided with an intercooler provided on the other one of the upper and lower sides on the front side of the radiator.

The cooling device for a working vehicle according to claim 4.