JP2002067657A - Structure of cabin for mounting air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a conventional problem as small living space since when an air conditioner is provided inside a cabin, it is arranged at the center of the ceiling or the frontward thereof. SOLUTION: In construction where an air conditioner 30 is arranged in a cabin 12 which covers an operation part of a traveling body, the air conditioner 30 is arranged so as to lay astride the inside and outside the cabin over the rear part of the cabin, a duct 40 which communicates with a discharge port 30a of the air conditioner 30 is integrally formed with the inner roof 42 which composes the ceiling of the cabin, the duct branches off from the center part of the right and left of the rear part to both right and left sides and extends forwardly, blow off parts 42a and 42b are provided in the duct, a plurality of ducts are provided, and partition plates 43 are provided in between the blow off ports.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a tractor cabin, and more particularly to an arrangement of an air conditioner such as an air conditioner and a ventilation fan arranged in the cabin, and a structure of a duct for guiding air discharged from the air conditioner. .

[0002]

2. Description of the Related Art Conventionally, there has been known a technique of covering an operating portion of a tractor with a cabin and providing the cabin with an air conditioner such as an air conditioner or a ventilation fan. For example, Japanese Patent Application Laid-Open
147430 and JP-A-8-192620.
In the former technology, an air conditioner was placed in the center of the front and rear of the cabin ceiling, and an air intake was located behind the cabin ceiling. In the latter technology, an air conditioner is disposed at a front position of a ceiling of a cabin, an air conditioner body is disposed outside a cabin, and is disposed above a windshield, and an outside air intake of the air conditioner is provided at a side portion. It was being done.

[0003]

However, in the former technique, since the air conditioner is provided on the ceiling, the cabin is increased by the vertical length of the air conditioner, so that the entrance height of a garage or the like for storing is increased. However, when transporting on a truck, there are cases where the height does not fall within the regulation value of the height limit. In order to keep within this regulation value, the interior space must be reduced, the overhead clearance becomes smaller, and the habitability deteriorates. Also, in the case of export specifications, seats with suspension may be installed.In this case, the seat surface of the seat rises and the interior space becomes smaller, and to obtain the same indoor space, domestic specifications and export specifications are required. It could not be a common cabin.

In the latter technique, since the air conditioner is arranged on the front and outside of the cabin, the height of the upper end of the cabin can be suppressed and the interior space can be kept large, but the visibility in the upper front is poor. In particular, when a front loader is mounted, the work becomes difficult.
Also, because part of the air conditioner is located on the front ceiling,
Sometimes getting in and out of the cabin was in the way. In addition, since a duct must be arranged to blow air to the inner surface side of the windshield, the number of parts is increased and the assemblability is deteriorated.

[0005]

The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described. That is, in claim 1, in the configuration in which the air conditioner is arranged in the cabin that covers the driving section of the traveling body, the air conditioner is arranged so as to extend over the inside and outside of the cabin on the rear part of the cabin.

According to a second aspect of the present invention, a duct communicating with a discharge port of an air conditioner is integrally formed on an inner roof constituting a ceiling of the cabin.

According to a third aspect of the present invention, the duct is branched from the left and right center of the rear part to the left and right sides and extends forward.
An outlet was provided in the duct.

Further, in claim 4, a plurality of the outlets are provided, and a partition plate is provided between the outlets.

[0009]

Next, embodiments of the present invention will be described with reference to the accompanying drawings. 1 is a side view of a tractor equipped with a cabin of the present invention, FIG. 2 is a side view sectional view of a steering post mounting portion, FIG. 3 is a plan view thereof, FIG. 4 is a side sectional view of the upper and rear portions of the cabin, and FIG. FIG. 6 is a front sectional view of the duct part, FIG. 7 is a side sectional view of the same, FIG. 8 is a plan sectional view of the corner at the rear of the cabin, FIG. 9 is a front view of the front strut, FIG. 10 is a schematic front view showing a state when the door is closed, FIG. 11 is a front cross-sectional view of a first embodiment of a fender contact portion of the door, FIG. 12 is a front cross-sectional view of a second embodiment, and FIG. FIG.

First, the cabin 12 of the present invention will be described with reference to FIG.
The overall configuration of the tractor equipped with the will be described. Front wheels 2 are supported on the engine frame 1 via a front axle case, and a transmission case 6 is disposed at the rear of the engine frame 1 via a clutch housing. On both sides of the transmission case 6 via a rear axle case. The rear wheels 3.3 are supported. A work machine can be mounted to the rear of the transmission case 6 via a work machine mounting device including a top link, a lower link and the like. Further, a front wheel drive output shaft projects forward from a lower front portion of the transmission case 6 to form a universal joint,
The front wheels 2 can be driven via a transmission shaft or the like.

An engine 5 is mounted on the engine frame 1, and the engine 5 is covered by a hood 4. A dashboard 11 is arranged at the rear of the hood 4, an operation panel 18 and a steering wheel 19 are arranged on the dashboard 11, and a seat 15 is arranged behind the dashboard 11.
And the like are configured to be covered by the cabin 12. The cabin 12 is a cabin frame in which a front support 13 is erected from the engine frame 1 and a rear support 14 is erected from the transmission case 6. Beams are laid horizontally on the upper part, the ceiling is covered by a roof 31, and the front is front. The glass is covered with doors 50 and 50 on the side and the rear glass 35 on the rear. A direction indicator 9 is provided below the rear support 14.

The handle shaft of the steering handle 19 passes through the dashboard 11 and is supported on a cabin floor 21 via a vibration isolating member 20. Is difficult to be transmitted into the cabin 12.

That is, as shown in FIGS. 2 and 3,
The cabin floor 21 is fixed to the machine, and the cabin floor 21 has a power steering hydraulic switching unit 2.
The opening 21a is open enough to allow the passage 2 to pass therethrough.
The rear part of the cabin floor 21 is covered with a step cover 28. The guide pipes 23, 23.2 are bolted onto the cabin floor 21 by bolts 29, 29, 29.
3, vibration isolating members 20 made of rubber or the like are fixed to the outer periphery of the guide pipes 23. However, the guide pipe 23
23 can be fixed on the cabin floor 21 by welding or the like.

On the other hand, the steering shaft is the steering post 2
4, a base plate 25 is fixed to the lower end of the steering post 24, and a power steering oil pressure switching unit 22 is fixed to the lower surface of the base plate 25, and an input shaft of the power steering oil pressure switching unit 22 is fixed. The handle shaft is connected and fixed. The power steering oil pressure switching unit 22 switches the oil passage in accordance with the amount of rotation of the steering handle 19 and sends pressure oil to a power steering cylinder (not shown), which rotates the front wheel 2 for steering. The turning handle 19 is turned in the turning direction so that it can turn. Then, connecting pipes 26, 26, 26 are erected on the base plate 25, and the connecting pipe 26 is connected to the guide pipe 23 and the vibration isolating member 2.
It is composed of a cylindrical body having an inner diameter to which 0 can be fitted.

Thus, the power steering hydraulic pressure switching unit 22 is fixed to the steering post 24 via the base plate 25, and the connecting pipe 26 fixed to the base plate 25 is connected to the cabin floor 2 via the vibration isolating member 20.
1 and is connected to the guide pipe 23 erected at 1.
That is, steering units such as the steering handle 19, the handle shaft, and the power steering oil pressure switching unit 22 are attached to the machine via the vibration isolating member 20. A seal member 27 is interposed between the cabin floor 21 and the base plate 25 to prevent water leakage and noise.

With the above configuration, the power steering hydraulic pressure switching unit 22 is conventionally housed in the engine room, and the power steering hydraulic pressure switching unit 22 is operated from a steering handle via a universal joint or the like. Therefore, although there is an arrangement space in a model having a large engine room, a power steering hydraulic switching unit 22 must be arranged below a steering column (dashboard) in a small model having a small storage space. Although a problem has occurred, noise and vibration generated from the power steering hydraulic pressure switching unit 22 are absorbed by the vibration isolating member 20 by the above-described configuration, and transmission of noise and vibration into the cabin 12 is prevented. It is reduced. Further, since there is no gap, intrusion of dust and the like can be prevented.

The power steering hydraulic pressure switching unit 22 and the handle shaft are connected by spline fitting. However, since the power steering hydraulic pressure switching unit 22 is fixed to the steering post 24,
The play at the spline fitting portion is reduced, and the wear due to vibration is reduced, so that the life is extended and the number of maintenances can be reduced.

An air conditioner 30 according to the present invention is disposed at the upper outer rear portion of the cabin 12. In this embodiment, the air conditioner 30 is an indoor unit of an air conditioner, but may be a ventilation fan or the like. The air conditioner 3
4, the roof 31 that covers the ceiling of the cabin 12 is housed in a portion that extends rearward from the rear struts 14, as shown in FIGS. 4 and 5, and is disposed so as to straddle the inside and outside of the cabin 12. I have. The rear end of the roof 31 is located forward of the rear end of the rear wheel 3 so that the overall length does not become longer.

The mounting structure of the air conditioner 30 is such that a beam 32 is installed between the upper portions of the rear columns 14, 14, and a bracket 33 having a U-shape in a plan view projects rearward from the left and right halfway of the beam 32. The front part of the air conditioner 30 is mounted and fixed on the beam 32, and the side and rear parts of the air conditioner 30 are supported and fixed by the bracket 33. At this time, the air conditioner 30 is disposed so as to be inclined forward and backward, and the front and rear length is made as short as possible, and the drain water easily flows downward and backward.

The air conditioner 3 outside the cabin 12
The lower cover 34 covering the lower surface of the air conditioner 30 is provided with an opening 34b for introducing outside air, and a switching device (not shown) for switching between the introduction of outside air and the circulation of room air is provided at the suction portion of the air conditioner 30. Is provided. Since the hinge 36 of the rear glass 35 of the cabin 12 is arranged at the front end of the lower cover 34, a concave portion 34a is formed to avoid interference between the two.

As described above, the air conditioner 30 is mounted on the cabin 12.
The outlet 30a of the air conditioner 30 is disposed facing the inside of the cabin 12, and the main body of the air conditioner 30 is disposed so as not to be located inside the cabin 12, and the ceiling height inside the cabin 12 is provided. Height, so that the interior space does not decrease. Since the suction side of the air conditioner 30 is located outside the cabin 12, the outside air can be easily taken in. In addition, since the air conditioner 30 is inclined, the dew condensation water generated at the time of cooling can be easily discharged from the rear side of the cabin 12, so that the water does not enter the cabin 12.

The air discharge port 3 of the air conditioner 30
As shown in FIGS. 4, 5, and 6, the reference numeral 0 a is disposed at a position overlapping the rear support 14 in a side view, and is a position facing the inside of the cabin 12. Note that FIGS. 5 and 6 show only one left and right side because they are configured substantially symmetrically.

A duct 40 is connected to the air discharge port 30a.
Is communicated. The duct 40 is formed between the upper roof 41 and the inner roof 42 of the cabin 12, and the inner roof 42 is formed with a groove-shaped concave portion (or convex portion) by injection molding of synthetic resin or the like, thereby forming the upper roof 41 with the upper roof 41. The duct 40 is formed between the inner roofs 42.

That is, the duct 40 has an upper roof 41
From the state where the inner roof 42 is aligned with the inner roof 4
5 is bulged downward, and as shown in FIG. 5, the cabin 12 is bifurcated from the discharge port 30a of the air conditioner 30 at the left and right center, and is bent to the left and right sides and then to the front. And is formed in a substantially U-shape in plan view.

As shown in FIGS. 5 and 7, a plurality of outlets are provided on the lower surface of the duct 40. In this embodiment, there are provided a defroster outlet 42a opened at the front to prevent fogging of the windshield and an operator outlet 42b opened at an intermediate part to blow air to the operator. The defroster outlet 42a and the operator outlet 42b are provided with wind directional members 49, 49 capable of changing the wind direction. It can also be done. Although the number of outlets is two for one duct in the present embodiment, three or more outlets can be provided.

Then, the defroster outlet 42
a and the blower outlet 42 for the defroster so that the air volume blown out from the outlet 42b for the operator becomes substantially equal.
a and the duct 40 between the operator outlet 42b
A partition plate 43 is provided therein. In the present embodiment, the plate-like partition plate 43 projects obliquely on the inner roof 42 in the duct 40, but the partition plate 43 may project from the upper roof 41. Also,
By changing the position, angle, and size of the partition plate 43, it is possible to change the ratio of the amount of air flowing from the defroster outlet 42a and the operator outlet 42b.

With this configuration, the air conditioner 30 is located outside the cabin 12, and the ducts 40 are located on both left and right sides of the ceiling in the cabin 12. Can obtain a height substantially equal to that of the conventional art. Then, the wind of the air conditioner 30 can be blown out from the duct 40 toward the operator and the windshield, and the temperature, humidity, and the like in the cabin 12 can be adjusted.

As shown in FIG. 8, a space is formed between the duct 40 and the corner of the cabin on both left and right sides of the ceiling of the cabin 12, and an air intake 44 for air from the room is formed in this space. A filter 45 is provided in the inlet 44 and is connected to the air inlet of the air conditioner 30. In addition, a member 46 for filling a gap is arranged between the inner roof 42 and the upper roof 41 to prevent outside air from being taken in. Also, the rear support 14
The hoses 47 and 48 for sending the refrigerant of the air conditioner 30 are inserted between the inside or outside of the air conditioner and the inner panel.

As shown in FIGS. 9 and 10, the front support column 13 of the cabin frame is formed in a "C" shape which is recessed inward when viewed from the front, so that the side door 50 can be closed and closed. I have to. That is, the front support 13 has an angle α extending outwardly from a substantially central portion (L1 = L2) in the front view.
The receiving portion of the lock device 51 of the door 50 is disposed at the central bent portion 13a. The door 50 is made of a single transparent glass plate, and is pivotally supported on the rear support 14 by a hinge 52 serving as a pivot support at the rear (FIG. 1), and the front is closed by the lock device 51. It can be locked with. The bending angle α is within an angle at which the glass constituting the door 50 can return to its original state even if it is elastically deformed. In other words, it is within an angle that does not reach the elastic limit.

The reason for bending in the "C" shape is that an error is inevitably generated when the cabin 12 is assembled. Therefore, when the cabin 12 is not formed in the "C" shape as described above, the door 50 formed in a flat plate shape is used. When is mounted on the cabin frame and closed, a gap is inevitably created due to an error. This gap has a large error particularly at both ends, so that a gap is formed at the end of the door 50, and noise is generated by vibration during traveling or work, and a draft wind enters in winter,
During the summer, there were problems such as the ineffectiveness of the cooler.
Conventionally, a sealing member such as rubber was placed at the abutment with the door around the cabin frame to fill this gap.However, there is a limit to the thickness of the sealing member, and it is possible to fill all the gaps. In some cases it was not possible.

However, as described above, by forming the front column 13 in a “U” shape when viewed from the front, the upper and lower ends of the door 50 are in contact with the front column 13 when the door 50 is closed. Since the upper and lower centers of the door 50 are attracted to the front column 13 and locked in an elastically deformed state, the door 50 is locked.
Does not break due to elastic deformation due to excessive force,
Since the top and bottom and the center of the door 50 are brought into close contact with the front frame 13, no gap is generated. Also, the play between the door 50 and the front support 13 can be eliminated. 56 is a seal member.

A gap is also easily formed between the door 50 and the fender 54. For example, as shown in FIG.
Conventionally, a square pipe-shaped contact body 55 is provided on the fender 54 '.
Are fixed by welding, and a seal member 56 is stuck on the outer surface of the contact body 55. However, when the contact body 55 is welded on the fender 54 ', welding distortion occurs, and a gap is formed between the distorted contact body 55 and the flat plate-shaped door 50.

Therefore, a rising portion is formed in the fender 54 at a contact portion where the rear lower inner surface of the door 50 contacts the fender 54, and the rising portion contacts the fender 54 so that the position does not change during molding. The portion 54a is integrally formed. That is, the fender 54 is made of a synthetic resin or the like, and a vertical surface (rise portion) is formed on the fender 54 to form the contact portion 54a so that the lower inner surface of the door 50 contacts. In addition, in order to further improve the sealing property, the sealing member 56 is provided at the contact portion between the door 50 and the fender 54 at the fender 54 or the door 50
It is stuck on.

As a first embodiment, the fender 54 is shown in FIG.
As shown in the figure, the inner fender 54IN and the outer fender 54OUT can be configured to be divided, and a contact portion 54a that forms a vertical surface is formed on the inner end side of the outer fender 54OUT. A fitting portion 54b formed in a U-shape in cross section is formed in the portion. At the time of assembly, the inner fender 54I
The fitting portion 54b is inserted into the outer end side of N. Also,
As a second embodiment, as shown in FIG. 12, a fender 54 in which the contact portion 54a is integrally formed may be used.

With this configuration, the contact portion 54a of the fender 54 is formed by integrally molding by injection molding when the synthetic resin is used as the contact portion 54a and by pressing or the like when metal is made of metal. The error caused by welding distortion and adhesion is eliminated, and the door 50 and the fender 54 are removed.
A gap could be eliminated in the contact surface between the two.

[0036]

As described above, the present invention has the following advantages. That is, in the configuration in which the air conditioner is arranged in the cabin that covers the driving unit of the traveling body, the air conditioner is arranged so as to straddle the inside and outside of the cabin on the rear portion of the cabin. Can be taken out of the cabin, and the air conditioner can be arranged in the same size as the living space of the conventional cabin,
The vehicle height does not increase. Further, since the air conditioner is arranged on the rear part, not on the head or the front part, it does not obstruct the view ahead, and it becomes difficult to hear the noise emitted from the air conditioner.
In addition, since the air conditioner is arranged so as to straddle the inside and outside of the cabin, outside air can be easily taken in from the outside portion of the air conditioner, the path can be shortened, and pipeline resistance and the like can be suppressed low.

In addition, since the duct communicating with the discharge port of the air conditioner is integrally formed on the inner roof constituting the ceiling of the cabin, there is no need to pipe the duct in the cabin. Therefore, the number of parts can be reduced, and the cost can be reduced. In addition, since the inner roof can be integrally formed of a synthetic resin or the like, manufacturing is easy, and design changes can be easily handled.

In addition, the duct is branched from the left and right center of the rear part to the left and right sides and extends forward, and the outlet is provided in the duct.
The space above the operator's head is almost the same as in the past, and there is no feeling of oppression, and air can be blown out in a desired direction from the outlet.

Further, since a plurality of the outlets are provided and a partition plate is provided between the outlets, the wind from the air conditioner can be substantially uniformly distributed in accordance with the number of the outlets. Can be ejected, and
By changing the size and inclination of the partition plate, the discharge amount from each outlet can be changed, and air can be discharged toward the windshield, the driver's seat, and the like.

[Brief description of the drawings]

FIG. 1 is a side view of a tractor equipped with the cabin of the present invention.

FIG. 2 is a side view sectional view of a steering post mounting portion.

FIG. 3 is a plan view of the same.

FIG. 4 is a side sectional view of the upper rear portion of the cabin.

FIG. 5 is a plan view of an air conditioner and a duct portion.

FIG. 6 is a front sectional view of a duct portion.

FIG. 7 is a side sectional view of the same.

FIG. 8 is a plan sectional view of a corner at the rear of the cabin.

FIG. 9 is a front view of a front support.

FIG. 10 is a schematic front view showing a state when the door is closed.

FIG. 11 is a front sectional view of the first embodiment of the fender contact portion of the door.

FIG. 12 is a front sectional view of the second embodiment.

FIG. 13 is a front sectional view of the related art.

[Explanation of symbols]

 12 cabin 30 air conditioner 30a outlet 40 duct 42 inner roof 42a / 42b outlet 43 partition plate

Claims (4)

[Claims] 1. An air conditioner having a configuration in which an air conditioner is disposed in a cabin that covers an operating section of a traveling body, wherein the air conditioner is disposed on a rear portion of the cabin so as to extend over the inside and outside of the cabin. Cabin structure to be installed. 2. A cabin structure for mounting an air conditioner according to claim 1, wherein a duct communicating with a discharge port of the air conditioner is integrally formed on an inner roof constituting a ceiling of the cabin. . 3. The cabin structure for mounting an air conditioner according to claim 2, wherein said duct is branched from a rear left-right center to left and right sides and extends forward, and said duct is provided with an outlet. 4. The cabin structure according to claim 2, wherein a plurality of the outlets are provided, and a partition plate is provided between the outlets.