WO2006132170A1

WO2006132170A1 - Cooling device for working vehicle

Info

Publication number: WO2006132170A1
Application number: PCT/JP2006/311195
Authority: WO
Inventors: Hironobu Yuube
Original assignee: Komatsu Ltd.
Priority date: 2005-06-06
Filing date: 2006-06-05
Publication date: 2006-12-14
Also published as: JP2006335329A

Abstract

A cooling device (1) has a cooler composed of a radiator (2), an after cooler (3), and an oil cooler (4), and also has a frame body (20) for receiving the cooler. The frame body (20) is constructed to be rigid and the cooler is received in the frame body, and as a result, the cooling device (1) has a wall structure. The cooling device (1) with the wall structure is caused to function as a part of a member forming an exterior frame (10). By this, a support member that has been necessary to make a cooling device function as a stand-alone device can be eliminated. Further, the space needed for the support member can be used for other purpose. Accordingly, vibration of a vehicle is prevented from acting on the cooling device and the cooling device is reliably and stably supported.

Description

Specification

Cooling device for work vehicle

Technical field

[0001] The present invention relates to a cooling device in a work vehicle.

In the description of the present application, the front-rear direction refers to the front side of the cooling device to which outside air is supplied as the front direction, and the direction in which the air that has passed through the cooling device flows out as the rear direction. Further, the left-right direction toward the front of the cooling device is defined as a lateral direction or a lateral direction, the bottom side of the cooling device is defined as a downward direction, and the upper side is defined as an upward direction.

Background art

[0002] Conventionally, in construction vehicles, civil engineering machinery, agricultural machinery, transport vehicles, working vehicles such as traveling vehicles, radiators that release heat from the cooling water that cools the engine and operations that actuate the actuator A cooling device equipped with cooling equipment such as an oil cooler that dissipates oil is installed.

[0003] The cooling device includes a cooling device such as a radiator, an oil cooler, and an aftercooler, and a support member that supports the cooling device. The cooling device is attached to the body frame in a stand-alone state.

[0004] In a conventional work vehicle, an arrangement configuration between a cooling device and a body frame as shown in FIG. 6 is used. As shown in FIG. 6, the cooling device 50 is also configured with a radiator 51, an oil cooler 52, an after cooler 53, and a frame body 54 that surrounds them. A dust-proof net 71 is detachably attached to the frame body 54 on the front side of the radiator 51, oil cooler 52, and aftercooler 53.

[0005] The frame body 54 includes a pair of vertical frames 55, and an upper frame 56 and a lower frame 57 connected to the upper end portion and the lower end portion of the pair of vertical frames 55, respectively. In the frame 54, the radiator 51, the oil cooler 52, and the aftercooler 53 are stored in a state where they are detachably fixed to the frame 54! RU

[0006] The frame body 54 is erected and fixed on the vehicle body frame 61 via bolts or the like (not shown).

Further, in order to prevent the cooling device 50 from shaking in the front-rear direction, the frame body 54 is provided with the support member 5. Supported by 8 and 59. The support member 58 that supports the frame body 54 has a rigid structure in which a support piece 58a attached to one vertical frame 55 and a support piece 58c supported and fixed to the vehicle body frame 61 are connected and fixed via a connecting member 58b. Become.

[0007] Further, the support member 59 has a rigid structure in which a support piece 59a attached to the other vertical frame 55 and a support piece 59c supported and fixed to the vehicle body frame 61 are connected and fixed via a connecting member 59b. It has become.

[0008] On the body frame 61, an external frame 60 is configured by standingly fixing a column 63, a rear wall 64, a side wall 65, a column 70, and the like. The exterior frame 60 is configured independently of the cooling device 50. A beam 66 for connecting and fixing the rear wall 64 and the side wall 65 is provided, and the beam 66 is fixed to upper ends of the rear wall 64 and the side wall 65.

[0009] The exterior frame is configured as a frame (framework) for attaching an exterior cover (not shown), and is a round.

[0010] The upper end of the column 63 and the beam 66 are connected and fixed by a cross beam 68. Further, the cross beam 68 supports and fixes the upper end portion of the rear wall 64. The intermediate beam 67 is attached to the column 63 and the column 70 in a state of being spanned between the column 63 and the column 70. In addition, a foot board 69 on which an operator can ride is attached to the column 70 and the beam 66 in a state of being spanned between the column 70 and the beam 66.

Disclosure of the invention

Problems to be solved by the invention

The cooling device 50 described in FIG. 6 as the prior art is erected on the vehicle body frame 61 in a stand-alone state independently of the exterior frame 60. Therefore, the frame body 54 must be supported on the vehicle body frame 61 by using the support members 58 and 59.

Accordingly, a space for disposing the support members 58 and 59 is required. In addition, since it is necessary to secure a space for disposing the support members 58 and 59, the presence of the support members 58 and 59 is a great restriction in the layout design for disposing various devices.

[0013] In the present invention, a work vehicle that solves the above-described problems, secures another divertable space in the work vehicle, and can reliably support the cooling device with stable force. It is to provide both cooling devices.

Means for solving the problem

[0014] The object of the present invention can be achieved by the inventions described in claims 1 and 2.

That is, according to the first invention of the present application, in the cooling device for a work vehicle, the cooling device includes a cooling device including at least a radiator and a frame body that houses the cooling device, and the cooling device housed in the frame body. Depending on the device, the cooling device is configured as a wall structure, and at least one of the side plates constituting the frame body is configured as a part of the exterior frame.

[0015] In addition, the second feature of the present invention is characterized in that, in the configuration of the first invention, the connection configuration between the side plate of the frame body that houses the cooling device serving as the exterior frame and the exterior frame is specified.

The invention's effect

In the present invention, the cooling device is configured as a strong structure surrounded by a frame, and is also used as one member of the members constituting the external frame. For this reason, it is not necessary to use a dedicated support member for supporting the cooling device as used in the conventional example. Also, the side wall of the cooling device having a wall structure can be used in place of one support column constituting the exterior frame used in the conventional example.

[0017] With this configuration, a space for disposing a dedicated support member and a space for disposing a single support column that has become unnecessary by substituting with a cooling device become unnecessary. Therefore, these spaces can be diverted as spaces for installing other devices.

[0018] Further, since these spaces can be increased, the degree of freedom in design can be increased in the layout design for disposing each device. In particular, in a small work vehicle where it is difficult to secure an effective space, the ability to secure a new effective space is extremely important in designing a small work vehicle.

[0019] Further, since the side plate constituting the cooling device is configured as a part of the exterior frame, the cooling device can be surely supported and the force can be stably supported. As the outer frame Since the cooling device is configured by the side plate having the above strength, the cooling device can be given sufficient strength to prevent the influence of the vibration of the vehicle and the like.

[0020] In particular, since the cooling device is configured as a wall structure, it is possible to provide sufficient rigidity against bending stress, torsional stress, buckling stress and the like acting on the cooling device. Thus, since the cooling device having a wall structure with increased strength can be used as a part of the structural member in the exterior frame, the strength as the exterior frame can be greatly improved.

Brief Description of Drawings

FIG. 1 is a schematic perspective view showing an arrangement configuration of main parts in an exterior cover. (Example)

[FIG. 2] FIG. 2 is a schematic perspective view of the inside of the exterior cover in which a directional force different from that in FIG. (Example)

FIG. 3 is a perspective view of a frame. (Example)

FIG. 4 is a schematic perspective view before the cooling device is assembled. (Example)

FIG. 5 is a perspective view of a work vehicle. (Example)

FIG. 6 is a perspective view of the cooling device in the exterior cover. (Conventional example) Explanation of symbols

[0022] 1 ... Cooling device, 2 ... Rajeta, 3 ... After cooler, 4 ... Oil cooler, 8 ... Body frame, 10 ... Exterior frame, 11a, lib, 11c ... Beam, 14 ... Rear wall, 15 ··· Side wall, 20 ··· Frame, 21a, 21b… Vertical frame, 22 ··· Upper frame, 23 ··· Lower frame, 41 ··· Upper turning body, 46 ··· Lower traveling body ... Work vehicle, 50 ... Cooling device, 54 ... Frame body, 55 ... Vertical frame, 58 ... Support member, 59 ... Support member, 60 ... Exterior frame, 61 ... Body frame

BEST MODE FOR CARRYING OUT THE INVENTION

[0023] Preferred embodiments of the present invention will be specifically described below with reference to the accompanying drawings. As a cooling device for a work vehicle according to the present invention, in addition to the shape and arrangement described below, if the shape and arrangement can solve the problems of the present invention, the shape and arrangement are the same. Also can be adopted as a cooling device according to the invention It is. For this reason, the present invention is not limited to the embodiments described below, and various modifications are possible.

Example

Hereinafter, a hydraulic excavator will be described as an example of a work vehicle according to an embodiment of the present invention with reference to FIG. In the work vehicle 47, an upper swing body 41 is mounted on an upper portion of the lower traveling body 46. The upper swing body 41 is turnable via a swing cycle (not shown). The upper swing body 41 is disposed so as to be rotatable by a swing motor (not shown). The upper swing body 41 is roughly constituted by a swing frame, a counterweight 43, an engine room 9, an operator cab 40, and a work machine 44 (not shown).

[0025] The exterior cover 45 is configured to cover, for example, the upper part of the engine room 9. As the outer cover 45, there is a cover that is directly attached to an outer frame 10 (for example, see FIG. 1) described later via bolts or the like. In addition, it is configured as a part of the exterior cover 45 that is attached to the exterior frame 10 indirectly via hinges, links, etc., like an inspection window that opens the engine room 9 There is also.

FIG. 1 is a perspective view of the exterior frame 10 in which the side force of the cooling device 1 is also viewed. FIG. 2 shows a perspective view of the exterior frame 10 viewed from the engine room 9 side. As shown in FIGS. 1 and 2, the cooling device 1 includes a cooling device for the radiator 2, the after cooler 3, and the oil cooler 4, and a frame body 20 for housing the cooling device.

The frame body 20 is erected and fixed on the vehicle body frame 8 via bolts or the like (not shown). A pillar 13, a rear wall 14, a side wall 15, and the like are erected and fixed to the vehicle body frame 8, and together with the cooling device 1 constitute a side surface portion of the exterior frame 10. A beam 11c for connecting and fixing the rear wall 14 and the side wall 15 is provided, and the beam 11c is fixed to the upper ends of the rear wall 14 and the side wall 15. The upper end of the column 13 and the beam 11c are connected and fixed by a cross beam 16. Further, the cross beam 16 supports the upper end portion of the rear wall 14.

[0028] Between the support column 13 and the vertical frame 21a in the frame 20 of the cooling device 1, a beam 11a and a beam 11b are stretched. Each of the beams l la and l ib has a substantially L-shaped cross section, and each end of each of the beams is supported pieces 31a and 31b attached to the support column 13 and support pieces 24a and 24b attached to the vertical frame 21a (support pieces For 24b, see Fig. 3). . Further, the tread plate 17 on which an operator can ride is attached to the beam 11a and the beam 11c while being spanned between the beam 11a and the beam 11c.

[0029] Thereby, the exterior frame 10 can be formed in a rectangular parallelepiped shape in which the cooling device 1, the side wall 15 and the rear wall 14 form a wall on three sides, and the bottom surface portion also has a surface configuration by the body frame. As a result, the strength of the exterior frame 10 can be improved.

[0030] Although the exterior cover of the work vehicle is not omitted in FIG. 1, it can be attached to the exterior frame 10 by appropriate attachment means. Also, the exterior cover can be configured as a door that can be opened and closed.

[0031] On the engine room 9 side of the cooling device 1, a shroud 6 constituting a cooling air flow path is attached. A cooling fan (not shown) is disposed in the shroud 6, and air taken from outside can be taken into the engine room 9 through the radiator 2, the after cooler 3 and the oil cooler 4. The illustration of the motor and engine that drive the cooling fan is omitted.

Next, the configuration of the cooling device will be described with reference to FIGS. 3 and 4. A frame body 20 for storing cooling devices such as the radiator 2, the aftercooler 3, and the oil cooler 4 is configured in a substantially casing shape. Between the pair of vertical frames 21a and 21b, the upper frame 22 and the lower frame 23 are integrally fixed by fixing means such as welding.

[0033] The fixing method between the upper frame 22 and the lower frame 23 and the pair of vertical frames 21a and 21b is not limited to fixing means such as welding. Other fixing methods can be adopted as long as the frame body 20 can be rigid with respect to bending stress, torsional stress, buckling stress and the like.

[0034] Support pieces 24a and 24b for fixing and supporting one ends of the beams 1 la and 1 lb are attached to the vertical frame 21a. Further, as shown in FIG. 1, a support piece 24c (see FIG. 3) and a support piece 24d for fixing and supporting the cooling device 1 to the side wall 15 are attached to the vertical frame 21b. The pair of vertical frames 21a and 21b are formed in a U-shaped cross section, and have a guide for the cooling device stored in the frame 20 and a retaining structure for the cooling device stored in the frame 20.

[0035] By forming the pair of vertical frames 21a, 21b in a U-shaped cross section, the strength of the pair of vertical frames 21a, 21b can be improved. In addition, the chassis attached to the cooling device 1 It can also have a function as a flange portion for mounting the loudspeaker.

[0036] The upper frame 22 fixes the upper end portion of the cooling device, and also serves as an attachment portion at the upper end portion of the dustproof nets 5a and 5b as shown in FIG. The lower frame 23 is provided with a flange portion for preventing the cooling device from falling over on the same side as the upper frame 22 and a fitting hole member 32 such as rubber provided for positioning the cooling device. ing. Further, a support piece 30 for positioning and supporting the after-cooler 3 is attached.

Accordingly, the radiator 2, the oil cooler 4, and the after cooler 3 are housed in the frame 20 so that they can be pulled upward with respect to the frame 20.

As shown in FIG. 4, dustproof nets 5 a and 5 b can be detachably attached to the front side of the frame 20. The configuration with dustproof nets 5a and 5b is shown in FIG. The oil cooler 4 has a front / rear two-sheet force and is integrally fixed by a holding plate 27 and a connecting piece 28.

The holding plate 27 and the connecting piece 28 can be attached to the upper frame 22. Further, a positioning pin 26 for positioning and an oil communication path 4a for cooling are formed at the lower end of the oil cooler 4. The communication path 4a is protected by the support member 25, and prevents the communication path 4a from coming into direct contact with the lower frame 23.

As shown in FIG. 3, a frame 20 of the radiator 2 is formed by fitting a positioning pin (not shown) formed at the lower end of the radiator 2 and a fitting hole member 32 formed in the lower frame 23. Positioning with respect to can be performed.

[0041] The cooling device that is also positioned with respect to the frame 20 and has the power of the radiator 2, the aftercooler 3, and the oil cooler 4 has a side-by-side arrangement configuration as shown in FIGS.

However, the arrangement of the cooling devices is not limited to the side-by-side arrangement as shown in FIGS. For example, a structure in which a radiator is loaded in the frame body 20 and an oil cooler and an aftercooler are disposed on the front surface of the loaded radiator may be configured using only a radiator, or a radiator and an oil cooler are used. An appropriate configuration such as a configuration can be employed.

[0043] For this reason, the configuration of the frame is not limited to the configuration of the illustrated example. Other configurations can be adopted as long as the configuration can accommodate the radiator.

. In addition, the holding plate 27, the connecting piece 28, the support member 25, and the like are unnecessary members depending on the configuration of the oil cooler.

The description has been given based on the configuration using the beams 11 & to 11 the support column 13, the rear wall 14, the side wall 15, the cross beam 16, and the like as members constituting the exterior frame 10. However, the configuration of the exterior frame is not limited to the configuration in the illustrated example. As long as the cooling device 1 is configured as a part of the exterior frame, other configurations can be employed as the exterior frame.

In the present invention, the cooling device 1 is configured as a part of the constituent members of the exterior frame 10. This eliminates the need for the support members 58 and 59 required to prevent the cooling device 50 from swinging in the front-rear direction as shown in FIG.

Accordingly, in FIG. 1, the space in front of the dustproof nets 5a and 5b can be used effectively. In addition, since the columns supporting beam 11a and beam ib are no longer required in the rear part of vertical frame 21a, the space where the columns were no longer needed can be used effectively. Also, the strength of the exterior frame 10 can be increased by the wall structure of the cooling device.

Industrial applicability

[0047] The technical idea of the present invention can be applied to a device such as a bulldozer or the like to which the technical idea of the present invention can be applied.

Claims

The scope of the claims

[1] In the cooling system for work vehicles,

The cooling device includes a cooling device including at least a radiator, and a frame body that houses the cooling device,

The cooling device is configured as a wall structure by the cooling device housed in the frame,

A cooling device for a work vehicle, wherein at least one side plate constituting the frame is configured as a part of an exterior frame.

[2] The work vehicle cooling device according to claim 1,

A side plate serving as the exterior frame is connected to an exterior frame separated from the cooling device on the rear side of the cooling device.