JP2003285635A - Cooler for working vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily carry out a piping work for a cooler hose by easily assembling a bonnet after piping the cooler hose. <P>SOLUTION: The cooler for a working vehicle allows a refrigerant to circulate by connecting cooler instruments located within the bonnet 14 with a cooler hose. The cooler is provided with an open window 76 located in the front wall 15 of the bonnet, a slit 77 for inserting the cooler hose thereinto so as to lie in the range from the lower end of the front wall 15 of the bonnet to the open window 76, and a cover body 78 for covering the open window 76. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a cooler device for a work vehicle such as a backhoe.

[0002]

2. Description of the Related Art For example, in a work vehicle such as a backhoe, a cooler device such as a cooler condenser and a cooler compressor is provided in a bonnet, and a cooler unit having an evaporator and an expansion valve is provided in front of the bonnet. In some cases, a cooler hose is inserted through the front wall of the bonnet, and the cooler unit side and the cooler device in the bonnet are connected by a cooler hose to circulate the refrigerant.

[0003]

In the conventional work vehicle cooler device of this type, since it is necessary to insert the cooler hose into the front wall of the bonnet, when the work vehicle is assembled, after the bonnet is assembled on the production line, I was piping a cooler hose. However, it was difficult to assemble the cooler hose inside the bonnet, which caused gas leakage. In view of the above problems, the present invention is, after piping the cooler hose,
The bonnet can be easily assembled and the cooler hose piping can be made easily.

[0004]

The technical means of the present invention for solving this technical problem is provided in the hood 14 as follows.
Cooler condenser 51 and cooler compressor 52
Cooler equipment such as is provided, in front of the hood 14,
A cooler unit 55 that sends out cooling air cooled by a refrigerant is provided, and a cooler hose 57 is inserted through the bonnet front wall 15 to connect the cooler unit 55 side and a cooler device in the bonnet 14 with a cooler hose 57. In the cooler device for a working vehicle in which the coolant is circulated, an opening window 76 is provided in the bonnet front wall 15, and a slit for inserting the cooler hose 57 from the lower end of the bonnet front wall 14 into the opening window 76. 77 is provided so as to extend from the lower end of the hood front wall 15 to the opening window 76, and a cover body 78 that closes the opening window 76 is provided.

Further, according to the technical means of the present invention, the cover body 78 is provided with an insertion recess 80 having a lower end opening corresponding to the slit 77, and the cooler hose 57 is inserted and retained in the insertion recess 80. In point. Further, the technical means of the present invention is that a trim 81 is provided on the outer periphery of the insertion recess 80 so as to surround the cooler hose 57. Further, the technical means of the present invention is that the insertion recess 80
Trim around the outer periphery of the cooler hose 57 so as to surround the cooler hose 57.
1 is provided.

Further, according to the technical means of the present invention, the closing plate 82 for closing the lower end opening of the insertion recess 80 of the cover body 78 is
The point is that it is attached to the cover body 78.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 3, reference numeral 1 denotes a back hoe exemplified as a work vehicle, and the back hoe 1 is mainly composed of an upper swing body 2 and a lower traveling device 3. The running direction of the backhoe 1 (left-right direction in FIG. 1) is referred to as the front-rear direction, and the lateral direction orthogonal to the front-rear direction (sheet-penetrating direction in FIG. 1) is referred to as the left-right direction. Traveling device 3
On the left and right sides of the track frame 3A.
B, a drive wheel 3C, a track roller and a carrier roller are rotatably supported, a crawler traveling body 4 is wound around them, and the drive wheel 3C is driven by a hydraulic motor or the like. A dozer 5 is provided at the front of the traveling device 3.

The swivel body 2 is supported on a traveling device 3 so as to be swivelable about a vertical axis X, and a swivel base 6 is provided.
Mounted on the working device (excavation device) 7 provided in the front part of the vehicle, the driver's seat 8 provided on the swivel base 6, and the swivel base 6 such as the engine 9, the fuel tank, the hydraulic pump, the hydraulic oil tank, and the radiator. It is configured to include various devices and the like.
The swivel base 6 is provided with a bonnet 14 that covers various devices such as the engine 9 and the fuel tank mounted on the swivel base 6. The bonnet 14 includes a hood front wall 15, a bonnet right side wall 16, and a bonnet left side wall 17. And a bonnet rear wall 18.

The swivel base 6 is attached and fixed to the swivel frame 19 and a rear portion of the swivel frame 19 so as to balance the weight of the swivel frame 19 with respect to the engine 9 and the like and the working device 7 and the like provided in the front portion of the swivel base 6. 6 and a counterweight 20 (protector) forming the rear part of the main unit 6. Further, the left and right side surfaces, the front surface and the upper surface of the turning frame 19 such as the front side of the driver's seat 8 are appropriately covered with a cover body 23 or the like. The revolving frame 19 is provided with a revolving substrate 22 supported on the traveling device 3 via a revolving bearing 21 so as to be revolvable around the vertical axis, and a reinforcing member, various devices, and the like are mounted and fixed on the revolving substrate 22. A mounting member for fixing is fixed.

A pair of upper and lower support brackets 26 are provided on the front portion of the swivel board 22 so as to project forward from the swivel base 6,
A swing bracket 27 is supported on the support bracket 26 so as to swing left and right around a vertical axis. A boom 28 swingably supported around the horizontal axis by the swing bracket 27, an arm 29 swingably supported around the horizontal axis on the tip end side of the boom 28, and a tip end side of the arm 29. Bucket 30 mounted so that Squid dump operation is possible
The working device 7 is mainly constituted by a boom cylinder 31, an arm cylinder 3 and a boom cylinder 28, an arm 29, and a bucket 30 which are hydraulic cylinders.
2. It is operable by the bucket cylinder 33.

Inside the bonnet 14, a revolving frame 19 is provided.
A fixed support frame 37 is provided on the. The support frame 37 is mainly composed of a pair of left and right rear leg portions 38, a pair of left and right front leg portions 39, and an upper plate 40 which is connected to the upper ends of the leg portions 38 and 39 and to which the bonnet front wall 15 and the like are attached. In addition, the lower ends of the rear leg portions 38 and the front leg portions 39 are mounted and fixed to the swivel board 22 and the like via a partition wall and the like. The driver's seat 8 is arranged on the front side of the hood 14. As shown in FIG. 4, the step 43 is supported by the partition wall 42 or the like that is provided upright on the swivel board 22, and the driver seat 8 is supported by the support member 44 or the like that is provided upright on the step 43. There is.

A pair of left and right control consoles 45 are arranged on both left and right sides of the driver's seat 8, and a pair of left and right traveling control levers 46 for individually operating the left and right crawler traveling bodies 4 are arranged in front of the driver's seat 8. Has been done. Here, a driver's seat 8 and a control platform 45 arranged on the left and right of the driver's seat 8 constitute a driver's control unit, which is surrounded by a cabin 48 having a door 47. Inside the bonnet 14, cooler devices such as a cooler condenser 51, a cooler compressor 52, and a cooler receiver (receiver) 53 are provided. A cooler unit 55 is arranged on the step 43 in the cabin 48. The cooler unit 55 includes an evaporator, an expansion valve, and a blower, and has a cabin 4
The air introduced from the outside or inside of the room 8 is cooled by a refrigerant, and the cooling air is sent out. Further, a cooler hose 57 is inserted into the bonnet front wall 15, and the cooler unit 55 side and the cooler device in the bonnet 14 are connected by the cooler hose 57 to circulate the refrigerant.

The cooler hose 57 is a cooler unit 55.
First hose body 59 for connecting the cooler receiver 53 with the cooler receiver 53
And cooler unit 55 and cooler compressor 52
And a third hose body 61 connecting the cooler compressor 52 and the cooler condenser 51. The first hose body 59 and the second hose body 60 are connected to the cooler. Unit 55 to cabin 48
It passes under the step 43, is inserted into the insertion hole 41 of the step 43 near the driver's seat 8, and stands slightly above the step 43 above the front wall 15 of the hood. Then, the first hose body 59 is inserted into the bonnet front wall 15 and arranged in the bonnet 14, and the first hose body 59 is used for the cooler receiver 5.
1 and the second hose body 60 is connected to the cooler compressor 52.

5 to 7 and 12, the first hose body 59 and the second hose body 60 inserted from the bonnet front wall 15 into the bonnet 14 are the bonnet front wall 15
Immediately rearward of the hook member 65, the hook member 65 is engaged with the U-shaped hook member 65, and the hook member 65 is clamped by a cord band 66. This hook member 65 is
It is fixed by welding or the like to a mounting member 68 fixed to the partition wall 42 by a mounting tool 67 such as a bolt. Further, the second hose body 60 inserted from the hood front wall 15 into the hood 14 and the third hose body 61 protruding from the cooler compressor 52 are clamped by the cord band 70 and then bent upward. U-shaped hook member 7
1 and is hooked and clamped by the cord band 72 to the hook member 71. The hook member 71 is attached to the upper plate 40 of the support frame 37 with a mounting tool 73 such as a bolt so as to hang down. From here, the second hose body 60 and the third hose body 61 are
It is arranged substantially horizontally toward the cooler receiver 53 or the cooler condenser 51.

In this case, the first hose body 59 and the second hose body 60 or the second hose body 60 and the third hose body 61 are placed on the hook members 65 and 71 so as to be hung from above to hook the first hose body 59 and the second hose body 60 and the third hose body 61. 1 hose body 59 and 2nd hose body 60 or 2nd hose body 60 and 3rd hose body 61
Can be easily positioned and locked in the vertical direction, and the hose members 59, 6 can be attached to the hook members 65, 71.
The position can be easily adjusted in the longitudinal direction of 0,61.
Therefore, by utilizing the U-shaped hook members 65, 71 and the cord bands 66, 72, the hose bodies 59, 6
It is possible to securely and easily clamp 0, 61.

As shown in FIGS. 8 to 10, the bonnet front wall 15 is provided with a plurality of mounting holes 75 at the lower end thereof, and the bonnet front wall 15 is provided with the partition wall 4 through the mounting holes 75.
It is adapted to be fastened and fixed to 2 or the like by an attachment 67 such as a bolt. Opening window 76 on the hood front wall 15
And a slit 77 for inserting the cooler hose 57 (the first hose body 59 and the second hose body 60) from the lower end of the bonnet front wall 15 into the opening window 76 is provided from the lower end of the bonnet front wall 15. A cover body 78 is provided so as to reach 76 and closes the opening window 76. That is, the cover body 78 is arranged so as to close the opening window 76 from the rear side with respect to the bonnet front wall 15, and can be detachably attached to the bonnet front wall 15 through the attachment holes 84 and the like by the attachment 79 such as a bolt. It is installed.

The cover body 78 is provided with an insertion recess 80 having a lower end opened corresponding to the slit 77. The insertion recess 80 has a lower square hole 80a and an upper U-shaped insertion hole 80b. And have a continuous shape. Cooler hose 5
The first hose body 59 and the second hose body 60 of No. 7 are inserted and retained in the insertion recess 80 (insertion hole 80a). A trim 81 is provided on the outer periphery of the insertion hole 80 a of the insertion recess 80 so as to surround the first hose body 59 and the second hose body 60. A closing plate 82 for closing the lower end opening of the insertion recess 80 of the cover body 78 has mounting holes 84, 8 in the cover body 78.
It is attached by the attachments 79 such as bolts through 5. The closing plate 82 is provided with a trim 86 corresponding to the insertion recess 80.

According to the above embodiment, the bonnet 14
Before assembling, the cooler hose 57 (first hose body 59, second hose body 60, third hose body 61, etc.) of the cooler device is arranged inside the bon bonnet 14 and below the step 43, and then the bonnet 14 Bonnet front wall 1
5, the bonnet right side wall 16, the bonnet left side wall 17, the bonnet rear wall 18, etc. may be assembled, and when installing on the bonnet front wall 15, as shown in FIG. Slit edge 8
8a and 88b are bent back and forth to expand the opening of the slit 77, and in this state, the first hose body 59 and the second hose body 60 of the cooler hose 57 are connected to the hood front wall 15
From the lower end of the hood to the inside of the opening window 76 through the slit 77, and then to close the opening window 76.
The cover body 78 is attached to 5. At this time, the insertion recess 8
The first hose body 59 and the second hose body 60 are inserted into 0 and fitted internally. After that, the cover plate 78 is attached to the cover plate 78.
2 may be attached to close the lower end opening of the insertion recess 80, and the first hose body 59 and the second hose body 60 are inserted and retained in the insertion recess 80 in the front-rear direction while being surrounded by the trims 81 and 86. To be done. As described above, the hood 14 (bonnet front wall 15) can be easily assembled after piping the cooler hose 57, and the piping of the cooler hose 57 can be easily carried out without the hood 14 interfering. You can do it.

Although the present invention is applied to the backhoe 1 as a work vehicle in the above-described embodiment, the work vehicle to which the present invention is applied is not limited to the backhoe 1 and is applied to a front loader and other work vehicles. The invention may be applied and implemented.

[0020]

According to the present invention, the bonnet 14 can be easily assembled after the cooler hose 57 is installed, and the cooler hose 57 can be easily installed.

[Brief description of drawings]

FIG. 1 is a side view of a backhoe.

FIG. 2 is a plan view of a backhoe.

FIG. 3 is a side view of the front of the hood of the backhoe and the inside of the hood.

FIG. 4 is a side view in front of the hood of the backhoe.

FIG. 5 is a front view of the inside of the hood.

FIG. 6 is a side view of the inside of the bonnet.

FIG. 7 is a plan view of the inside of the hood.

FIG. 8 is a front view of the front wall of the hood.

FIG. 9 is a front view of a cover body.

FIG. 10 is a front view of the cover body with the cover body removed.

FIG. 11 is a front view of the closing plate.

FIG. 12 is a side view of the lower side of the bonnet front wall.

FIG. 13 is a perspective view of the lower side of the bonnet front wall.

[Explanation of symbols]

1 backhoe 14 Bonnet 15 Bonnet front wall 51 Cooler condenser 52 Compressor for cooler 53 Cooler receiver 55 Cooler unit 57 Cooler hose 59 1st hose body 60 Second hose body 76 open window 77 slits 78 cover body 80 insertion recess 81 trim 82 Block

Claims (4)

[Claims] 1. A cooler device such as a cooler condenser (51) and a cooler compressor (52) is provided in the bonnet (14), and in front of the bonnet (14),
A cooler unit (55) for delivering cooling air cooled by the refrigerant is provided, and a cooler hose (57) is inserted through the front wall (15) of the hood to insert the cooler unit (5).
In a cooler device for a working vehicle in which a cooler hose (57) is connected between the 5) side and a cooler device in the bonnet (14) to circulate a refrigerant, an opening window (15) is formed on the bonnet front wall (15). 76) is provided, and the cooler hose (57) is attached to the hood front wall (1).
A cover (7) for inserting the opening window (76) from the lower end of 4) is provided so as to extend from the lower end of the hood front wall (15) to the opening window (76) and closes the opening window (76). A cooler device for a work vehicle, which is provided with a body (78). 2. The slit (7) in the cover body (78).
7. The work vehicle according to claim 1, wherein an insertion recess (80) having an open lower end is provided corresponding to 7), and the cooler hose (57) is inserted and retained in the insertion recess (80). Cooler device. 3. A cooler device for a working vehicle, wherein a trim (81) is provided on an outer periphery of the insertion recess (80) so as to surround a cooler hose (57). 4. An insertion recess (8) of the cover body (78).
The closing plate (82) for closing the lower end opening of the cover body (7).
8) A cooler device for a work vehicle, which is attached to the work vehicle.