JP2986307B2 - Outside air introduction structure of cabin air conditioner in tractor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates are those related to the outside-air introducing structure for an air conditioner of the cabin to be mounted on the body of the tractor.

[0002]

2. Description of the Related Art In a cabin mounted on a vehicle body of a tractor, the roof is composed of an inner roof disposed on the indoor side and an outer roof positioned above the inner roof. There is an air conditioner provided between the air conditioner and the outer roof. In this case, since the air intake of the air conditioner is located at the rear part of the roof, the outside air introduction part for introducing outside air outside the cabin room to the air conditioner is provided at the rear part of the roof.

[0003]

The working machine mounted on the tractor is mainly a rear-mounted working machine, and dust tends to be generated at the rear of the tractor. Therefore, a filter provided at the air intake of the air conditioner is immediately visible. There is a problem of clogging. In addition, when the outside air introduction section is provided at the front of the roof, the same problem as described above occurs in the case of a front-mounted working machine. In view of the above problems, it is an object of the present invention to consider so that outside air can always be introduced from a portion with less dust.

[0004]

The technical means taken by the present invention to achieve the above object is that the tractor body 1 is keyed.
Yabin 4 is mounted, the middle roof 12 of the cabin 4
An air conditioner 15 is provided in the roof 12 so as to be formed in an empty state.
When the outside air introduction part 23F on the front side
Then, the outside air on the rear side outside the cabin chamber is
A rear outside air introduction part 23R is provided to take in the front outside air.
Outside air taken from the inlet 23F to the air conditioner 15
And a duct 22 for guiding the
The outside air taken in from outside air introduction part 23R is merged,
At the merging part, from one of the front and rear outside air introduction parts 23F and 23R
The point is that a switching damper 27 for switching the introduction of the outside air is provided so as to selectively introduce the taken outside air into the air conditioner device 15.

[0005]

When the outside air is introduced into the air conditioner unit 15 between the inner roof 13 and the outer roof 14, when the work which is easy to be dusty is performed at the front part, the switching damper 27 is switched to switch the outside air introduction part 23R at the rear part. In the case where the outside air is introduced from the outside and dust is easily collected in the rear part, the switching damper 27 is switched to introduce the outside air from the front outside air introduction part 23F. As described above, the switching damper 27 is used to introduce outside air into the air conditioner device 15 from the front or the rear of the roof 12.
In this case, the outside air can be always introduced from a portion where the amount of dust is small, thereby preventing clogging of the filter at an early stage and preventing trouble due to dust.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 4, reference numeral 1 denotes a tractor body, which is mainly composed of an engine 2, a transmission case 3, and the like.
A cabin 4 is mounted at the rear. This cabin 4
The front frame 5, the rear column 6 and the intermediate column 7 therebetween are arranged on the left and right, and the upper frame 8 is formed between the left and right front columns 5 upper part, between the left and right rear columns 6 upper part, and between the front and rear columns 5, 6 upper part.
It is framed by a box-shaped cabin frame connected by.

A windshield is provided between the left and right front supports 5, a rear glass 9 is provided between the left and right rear supports 6, an entrance door 10 is provided between the front support 5 and the intermediate support 7, and an intermediate support 7 and the rear support are provided. 6 are provided with side glasses 11 respectively. A roof 12 is provided on an upper portion of the cabin 4, and the roof 12 is, as shown in FIGS. 2 and 3,
An inner roof 13 arranged on the indoor side and an outer roof 14 located above the inner roof 13 are formed in a middle state and have a space inside. An air conditioner 15 is provided in front of the interior space of the roof 12.
Is provided.

[0008] The air conditioner 15 is shown in FIGS.
As shown in FIG. 2, an air conditioner main body 16 connected to a compressor (not shown), an air introduction duct 17 connected to a rear portion of the air conditioner main body 16, and a side outlet duct 18 connected to both left and right sides of the air conditioner main body 16 are provided. And the air conditioner body 1
6 mainly comprises a front blow-out duct 19 connected to the front part, and a pair of left and right air introduction blowers 20 provided on the rear end side of the air introduction duct 17. The air conditioner main body 16 has an evaporator, a temperature control damper, a blower switching damper, and the like inside.

The rear portion of the air introduction duct 17 is formed in a forked shape, and is connected to the discharge ports of the main body of the left and right blowers 20, respectively. The body portions of the left and right blowers 20 are provided with fans, and are housed on both left and right sides of a storage chamber 21 that is long in the left and right direction.
An outside air circulation duct 22 is provided on the lower side inside the outer roof 14 over the entire periphery. The front and rear sides of the outer roof 14 protrude in the front-rear direction from the upper frame 8 of the cabin 4 and have a large number of through-holes formed at the center in the left-right direction on the lower surface on the front side and on the left and right sides on the lower surface on the rear side. Introduction parts 23F and 23R are formed,
Outside air is introduced into the outside air circulation duct 22 from outside air introduction portions 23F and 23R before and after this.

The outside air circulation duct 22 is connected to the roof 1
2, at the center of the rear end side in the left-right direction, is communicated with the accommodation chamber 21 by a communication member 25 having a filter 24;
The air in the outside air circulation duct 22 is supplied to the air conditioner main body 16 via the communication member 25, the accommodation room 21, and the air introduction duct 17 by the blower 20. Also,
The introduction of the outside air can be selectively switched by the damper device 26 so that the outside air can be introduced from either the front outside air introduction section 23F or the rear outside air introduction section 23R.

A damper device 26 is provided with a pair of left and right switching dampers 27 for opening and closing the rear outside air introduction portions 23R.
The switching damper 27 is fixed to a pivot 28 whose outer portion is rotatably supported around the front-rear axis, and the switching operation of the switching damper 27 around the pivot 28 opens and closes the rear outside air introduction portion 23R. In addition, when the switching damper 27 is opened as shown by the phantom line in FIG. 3, the passage from the outside in the left-right direction to the center of the outside air introduction portion 23R on the rear side of the outside air circulation duct 22 is blocked. It is supposed to be.

Therefore, when the rear outside air introduction section 23R is closed by the switching damper 27, outside air is introduced into the air conditioner 15 only from the front outside air introduction section 23F, and the rear outside air introduction section 23R is opened. In this case, the outside air introduction from the front outside air introduction part 23F is shut off by the switching damper 27, and outside air is introduced into the air conditioner device 15 only from the rear outside air introduction part 23R. One end of an arm 29 is fixed to a pivot 28 of each of the left and right switching dampers 27, and one end of a connecting rod 30 is pivotally connected to the other end of the arm 29. The operation lever 31 is pivotally connected to the operation lever 31.

The operating lever 31 is supported by a support shaft 32 so as to be able to swing left and right. By the swinging operation of the operating lever 31, each connecting rod 30 is pushed and pulled left and right, and is switched via an arm 29. The damper 27 is opened and closed. As shown in FIGS. 2 and 5, a mounting plate 33 is disposed below the front part of the air conditioner main body 16, and the mounting plate 33 is attached to the upper frame 8 of the cabin frame.
And is attached to the upper frame 8. Below this mounting plate 33, the air conditioner 15
The control unit 34 and the radio-cassette 35 are arranged and attached to the mounting plate 33 by the bracket 36. The mounting plate 33 also has a function as a waterproof cover for preventing water droplets from hitting the control unit 34 or the radio-cassette 35 when dew attached to the lower surface of the air conditioner body 16 falls.

As shown in FIGS. 6 to 9, mounting brackets 3 made of leaf springs are provided on both left and right sides of the boombox 35.
7 is fixed, and a bulge portion 39 into which a mounting bracket 37 is removably inserted is provided on a side wall of the stay 38 for mounting the boombox 35.
Are formed. The stay 38 is fixed (or integrally formed) to the bracket 36. The bulging portion 39 has a locking portion 4 before and after the mounting bracket 37.
The engagement holes 42, 0 and 41 are elastically engaged and disengaged.
43 are formed, and the mounting bracket 37 is
, The boombox 35 is attached and fixed to the stay 38.

In order to remove the radio-cassette 35, the radio-cassette 35 may be pulled out by elastically deforming the rear locking portion 41 inward. In the above-described embodiment, the outside air introducing portions 23F and 23R are formed on the front side and the rear side of the roof 12. However, the outside air introducing portions may be formed on the front and rear sides of the roof 12.

[0016]

According to the present invention, a tractor is equipped with a rear-mounted working machine.
When working with
The route of outside air outside the cabin to the air conditioner.
By switching, the cabin can be
The outside air on the front side of the outdoor can be taken into the air conditioner.
It is also possible to attach a front work machine to the tractor
When performing this, the outside air outside the cabin room is
The outside air introduction section on the rear side
From outside of the cabin room to the air conditioner.
Can be inserted, either rear-mounted or front-mounted
Even if the work machine is mounted on a tractor and used,
From outside the cabin to the air conditioner
This can prevent the filter of the air conditioner from being clogged early,
Problems due to dust can also be prevented.

[Brief description of the drawings]

FIG. 1 is a plan view of the inside of a roof.

FIG. 2 is a side sectional view of the inside of a roof.

FIG. 3 is a rear sectional view of a rear portion of the roof.

FIG. 4 is an overall side view of the cabin.

FIG. 5 is a plan view of the inside of the roof.

FIG. 6 is a plan sectional view showing the boombox mounting structure.

FIG. 7 is a perspective view of a boombox mounting stay.

FIG. 8 is a perspective view of the boombox.

FIG. 9 is a rear cross-sectional view showing a side portion of the boombox mounting structure.

[Explanation of symbols]

 4 Cabin 12 Roof 13 Inner Roof 14 Outer Roof 15 Air Conditioner 23F Front Outside Air Introducing Section 23R Rear Outside Air Introducing Section 27 Switching Damper

Claims (1)

(57) [Claims] 1. A cabin (4) on a vehicle body (1) of a tractor.
Medium There is mounted, the roof (12) of the cabin (4)
An air conditioner (1 ) is formed in the roof (12) and
5), and a cabin chamber is provided on the front side of the roof (12).
A front outside air inlet (23) for taking in outside front air
F), and a cabinet on the rear side of the roof (12).
Rear outside air inlet (2) that takes in rear outside air outside the room
3R) and take in from the outside air introduction part (23F) on the front side
Duct for guiding the outside air to the air conditioner (15)
(22), and the outside air on the rear side is introduced into this duct (22).
Outside air taken in from the part (23R)
One of the front and rear outside air introduction parts (23F) and (23R)
Switching damper (27) for switching the introduction of outside air to selectively introduce outside air taken in from the air conditioner device (15)
An outside air introduction structure for a cabin air conditioner in a tractor, comprising: