JP4960997B2 - Air conditioning structure for cabin of work vehicle - Google Patents

Description

The invention, together provided in the cabin of the driver's seat, the work that is arranged with the air conditioning Da transfected into the roof of the cabin, and air conditioning unit for feeding the conditioned air into the air conditioning duct make adjustments to the air The present invention relates to an air conditioning structure for a cabin of a car.

  In order to arrange the air conditioning unit, the front half of the roof part is formed in a descending ceiling part that bulges downward, and the air conditioning unit is arranged at the front end of the descending ceiling part (for example, Patent Document 1).

Japanese Patent Laying-Open No. 2005-1537 (paragraph number [0016], FIGS. 1 and 2)

In the said structure, in order to accommodate an air conditioning unit, since the roof part was formed in the descent | fall ceiling part, there existed a possibility that a front upper view might be narrowed. Then, when performing the front loader work, there is a possibility that the workability may be deteriorated because it is difficult to confirm the work site scooped up by the bucket when sitting in the driver's seat.
In addition, it may be difficult to see traffic lights when traveling on the road.

  An object of the present invention is to provide an air conditioning structure for a cabin of a work vehicle that improves the forward upper view by devising the arrangement configuration of the air conditioning unit.

(Constitution)
According to a first aspect of the present invention, a driver's seat is provided in the cabin, and an air conditioning duct is provided in the roof portion of the cabin, and an air conditioning unit that adjusts air and sends the adjusted air to the air conditioning duct. In the cabin air conditioning structure of a work vehicle,
The air conditioning unit is arranged on the rear side of the fuselage from the rear end of the seating portion of the driver seat,
The frame constituting the cabin is provided across a plurality of vertical frames, a lower frame that supports at least a lower end portion of the plurality of vertical frames, and an upper end portion of the plurality of vertical frames. An annular upper frame, and the lower frame includes a pair of left and right front-rear frames and a lower horizontal frame connecting the pair of front-rear frames. The left and right vertical frames on the most rear side of the aircraft are erected from the connecting position of the front and rear frame and the lower horizontal frame, and the horizontal frame at the rear of the annular upper frame is connected to the plurality of vertical frames. The left and right vertical frames on the rear side of the fuselage are projected in a U-shape in plan view from the left and right vertical frames on the rear side of the fuselage. There in that the space formed on the front side of the transverse frame side after came frame is disposed the air-conditioning unit, the effects thereof are as follows.

(Function and effect)
Since it was decided to place the air conditioning unit from the rear end of the seat of the driver's seat on the body rear side, the front side of the roof portion of the cabin, there is no need to form a downlink ceiling for housing the air-conditioning unit The front window position can be taken high. As a result, the front upper field of view could be improved.
Moreover, since the position of the air conditioning unit has been set on the machine body rear side of the rear end position of the seat of the driver's seat, in order to house the air conditioning unit to the rear of the roof portion, even to form the downstream roof portion, Neither the driver's forward view of the driver seated in the driver's seat is reduced, but the overhead space can be reduced.

Further, the air conditioning unit can be disposed inside the frame frame, and the air conditioning unit can be protected by the horizontal frame.

Overall side view of tractor The perspective view which shows the frame frame in 1st reference form Longitudinal side view in cabin in first reference form FIG. 2 is a cross-sectional plan view showing the inner surface of the inner roof portion viewed from the outer roof side in FIG. Front view showing the duct arranged on the side of the roof The perspective view which shows the frame frame in embodiment of this invention The vertical side view which shows the attachment structure of the air-conditioning unit in embodiment of this invention The perspective view which shows the frame frame in 2nd reference form Longitudinal side view showing mounting structure of air conditioning unit in second reference form The perspective view which shows the frame in the 3rd reference form Vertical side view showing the mounting structure of the air conditioning unit in the third reference embodiment (B) Perspective view showing a state where the upper end of the front support is made higher than the front-rear frame (b) Principle diagram showing the driver's upper front view in (b) (B) Perspective view showing a state in which the upper end of the front support is positioned rearward from the front end of the front-rear frame (b) Principle diagram showing the driver's upper front view in (b)

An agricultural tractor will be described as an example of a work vehicle. As shown in FIGS. 1 and 2, the agricultural tractor cabin 1 has a vertical frame 2 of a frame B constituting the framework and a transparent glass surface covering a portion surrounded by the vertical frame 2. A side door 3, a rear side window 4, and a rear window 5 are provided, and includes an annular upper frame 6 provided over the upper surface of each vertical frame 2 and a roof portion 7 placed on the upper frame 6. Has been.

A driving control unit 8 is provided in the cabin 1, and the driving control unit 8 is provided with a steering handle 11 on a handle post 10 located on the engine bonnet 9 side. 12 is arranged.
An air conditioning unit A for air conditioning the cabin 1 is disposed on the roof portion 7.

Hereinafter, the first reference embodiment will be described based on FIGS. 2 to 5, the embodiment of the present invention will be described based on FIGS. 6 and 7, and the second reference embodiment will be described based on FIGS. 8 and 9. . Further, the third reference embodiment will be described based on FIGS. 10 and 11, and another embodiment will be described based on FIGS. 12 and 13.
[ First Reference Form ]
Hereinafter, description will be made according to the difference in the mounting form of the air conditioning unit A. First, as a first reference embodiment, as shown in FIGS. 2 and 3, the rear end of the annular upper frame 6 in which the air conditioning unit A is provided over the upper surface of the vertically oriented frame 2 to form the frame B it described what are arranged in a state located on the upper side of the parts.

The structure of the frame B for mounting the air conditioning unit A will be described. As shown in FIG. 2, the left and right vertical frames 2 and 2 are connected to the bent portion of the annular upper frame 6 between the front and rear frame portions 6A and 6B . 2 is also used as a window frame of the rear side window 4 and a support frame 6C is installed at a height position extending over both the longitudinal frames 2 and 2 and one step below the rear frame portion 6B.

Ru The upper surface of the support frame 6C and placing the air-conditioning unit A in a state where On drop between the support frame 6C supporting the vertical frame 2, 2 on both sides tare.
As shown in FIG. 3, a pair of left and right brackets 16, 16 are attached to the upper surface of the support frame 6 </ b> C in a front-rear orientation, and the air conditioning unit A surrounded by the unit case 24 It is fixed by mounting.

The structure of the roof part 7 is demonstrated.
As shown in FIGS. 3 to 5, a roof portion 7 is made of the outer roof portion 13 and the inner roof section 14., respectively, are mounted supported on the upper frame 6. The inner roof part 14 is an integrally molded product of resin, and the rear half part located above the driver's seat 12 is formed in a descending ceiling part bulging downward, and the air conditioning unit A is accommodated in the descending ceiling part. It is.

As shown in FIGS. 2 and 3, the outer roof section 13 is placed on the upper surface of the upper frame 6 is wider plate-shaped than the mounting surface. The lower surface of the outer roof section 13, Yes wearing the seal ring 19 of rectangular cross section formed in a ring shape, while placing the outer roof portion 13 on the upper frame 6, the cross-section of the seal ring 19 one The portion comes into contact with the upper surface of the upper frame 6 to block the air flow from the outside.

As shown in FIGS. 3 to 5, lateral overhanging portion outside air inlet 13B in the lower surface of 13E projecting both lateral sides of the upper frame 6 of the outer roof portion 13, with 13B is formed, the sealing ring An outside air supply port 13 </ b> C communicating with the above-described outside air introduction port 13 </ b> B is formed in a portion located inside 19. In the figure, reference numeral 33 denotes a dustproof filter provided in the outside air inlet 13B.
Outside air taken in from the outside air inlet 13B is guided through the communicating path b as outside air inlet duct formed in the double wall of the outer roof portion 13 on the vehicle body front side, formed on the body front side of the communication passage b ambient air It is configured to blow out from the supply port 13C to a space a leading to an air conditioning unit A described later.

The internal structure of the inner roof part 14 will be described. As shown in FIGS. 1 to 4, the air conditioning unit A, and a heater 21 positioned in front and evaporator 20, evaporator 20, Comp Re' service (not shown), an expansion valve, in cooperation with the condenser or the like Thus, a refrigerant circulation circuit is configured. The heater 21 is connected to the radiator 22 in the engine bonnet 9 by piping.
A sirocco fan 23 is provided on the right side of the evaporator 20 to send the outside air taken in from the outside air supply port 13 </ b> C toward the evaporator 20 and the heater 21.

Outside air introduced from the outside air supply port 13C, as shown in FIG. 3, a space a formed between the downward surface and the inner roof 14 of the outer roof section 13 as flow path, surrounded by the unit case 24 The suction is guided to the guide hole 24a of the sirocco fan 23.

As shown in FIGS. 3 to 4, the evaporator 20 and the sirocco fan 23 are surrounded by a unit case 24, and the air conditioning unit is continuous from the unit case 24 toward both sides of the evaporator 20 toward the front side of the body. A horizontal air-conditioning duct 15A for guiding air-conditioned air from A to the left and right lateral ends is provided, and lateral air-conditioning ducts 15B and 15B extend forward from both side ends of the rear air-conditioning duct 15A. .

The left and right horizontal air conditioning ducts 15B and 15B will be described. As shown in FIGS. 3 to 5, the left and right horizontal air-conditioning ducts 15 </ b> B and 15 </ b> B are provided with inward air outlets 15 b and 15 b , respectively, and the rear air outlets 15 b and 15 b are close to the driver's face. It is positioned to send an appropriate amount of cool breeze. On the other hand, at the front ends of the horizontal air-conditioning ducts 15B and 15B, the front downward air outlets 15a and 15a for blowing the air-conditioned air toward the front window 25 of the cabin 1 are directed to the door glass behind the air outlets 15a and 15a. An air outlet 15d for blowing a defrost wind is formed.

As shown in FIG. 2 and FIG. 3, branch ducts 15C and 15C extend from both side ends of the rear air conditioning duct 15A toward the rear side, and conditioned air is applied to the rear side window 4 and the rear window 5 at the extended ends. Air outlets 15c and 15c are provided. The horizontal air-conditioning duct 15B and the like described above are located in the inner roof portion 14, and are provided in a descending ceiling portion formed on both side ends of the inner roof portion 14 as shown in FIG.

  As shown in FIG. 3, a circulation port 14 </ b> A is provided on the front side of the airframe from the storage portion of the air conditioning unit A of the inner roof portion 14 in order to take in air in the cabin. The circulation port 14A is formed in a horizontal portion at the upper end of the raised portion 14c by raising the wall surface along the unit case 24 upward from the upper surface of the inclined surface forming the descending ceiling portion of the lower inner roof portion 14b. ing. Here, the rising portion 14c of the upper inner roof portion 14a is referred to as an inside air introduction duct.

On the other hand, the outside air supply port 13C and the circulation port 14A are positioned so as to face each other vertically, and an open / close valve body 17 is provided between them as a valve mechanism for opening and closing the outside air supply port 13C and the circulation port 14A. is there. A state in which outside air is taken into the space a formed between the inner roof portion 14 and the outer roof portion 13 through the outside air inlet 13B, and a state in which the outside air is blocked and the air in the cabin is circulated between the space a. It is comprised so that it may switch to.
The valve mechanism may be a slide type instead of a swing type. Although not shown, a switching operation lever for operating the valve mechanism is provided so as to be lowered to the vicinity of the upper part of the driver's seat 12.

  As shown in FIG. 3, the inner roof portion 14 includes a circulation port 14A for taking in air in the cabin, but the rear upper inner roof portion 14a and the cabin 1 that form the circulation port 14A are provided. And a front inner roof portion 14b located on the front side. The inner roof portion 14 is in close contact with the outer roof portion 13 at an intermediate position in the longitudinal direction of the machine body, and is separated into a rear inner roof portion 14a and a front inner roof portion 14b at the close intermediate position. By storing and installing the CD radio cassette 29 and the like in the space of the front inner roof portion 14b having such a configuration, the back pressure of the indoor air taken in from the circulation port 14A does not directly act on the CD radio cassette 29 and the like, and the CD radio cassette 29 And the like are less likely to inhale dust and the like.

  As shown in FIGS. 3 to 5, since the outside air introduction port 13 </ b> B is arranged near the air conditioning unit A, the communication path b formed in the outer roof portion 13 so as to communicate with the outside air introduction port 13 </ b> B is shortened. Inhalation resistance by the sirocco fan 23 can be reduced.

A support cover 18 extends on the rear side of the support frame 6C and covers the air conditioning unit A. Under surface of the support cover 18, the horizontal axis X around which the rear window 5 is supported freely backward swinging, and overhang is suppressed to the rear side of the rear window 5 in the closed state, it is shown Although it is not, the structure which avoids interference with the link mechanism etc. which support a tilling apparatus etc. is taken.

Embodiment of the present invention
Next, as an embodiment of the present invention, as shown in FIG. 6, an air conditioning unit A that is disposed in a state of being positioned on the front side of the machine body from the rear end portion of the annular upper frame 6 will be described. In the embodiment of the present invention, points different from the above-described first reference embodiment will be described, and other configurations than those described below are the same as those of the first reference embodiment.

As shown in FIG. 6, in the present embodiment, the longitudinal frame 2 positioned on the rearmost side of the fuselage that supports the rear frame portion 6 </ b> B of the upper frame 6 is the lower horizontal frame 41 of the lower frame 40 and the front-rear frame 42. The rear frame portion 6B is erected from the connection position, and protrudes to the rear side of the machine body from the longitudinal frame 2 located most on the rear side of the machine body in plan view. That is, the rear frame portion 6B is located on the rear side of the machine body from the lower horizontal frame 41 in plan view.
As shown in FIGS. 6 and 7, the outer roof portion 13 and the inner roof portion 14 are disposed so as to surround the air conditioning unit A, and the outside air supply port 13 </ b> C and the outside air supply are provided on the front side of the air conditioning unit A of the outer roof portion 13. An outside air introduction port 13B for sending outside air to the mouth 13C is provided on the downward surface of the flange portion 13A projecting to the rear side of the outer roof portion 13. The inner roof portion 14 is provided with a circulation port 14A for introducing the air in the cabin 1 in a state of being opposed to the outside air supply port 13C, and the outside air supply port 13C is provided between the outside air supply port 13C and the circulation port 14A. An on-off valve body 17 is provided as a valve mechanism for opening and closing the circulation port 14A. A state in which outside air is taken into the space a formed between the inner roof portion 14 and the outer roof portion 13 through the outside air inlet 13B, and a state in which the outside air is blocked and the air in the cabin is circulated between the space a. It is comprised so that it may switch to.

The air taken into the space a is sucked into the sirocco fan 23 through a guide hole 24a formed on the upper surface of the unit case 24 of the air conditioning unit A, and after being air-conditioned by the evaporator 20 or the like, the air conditioning duct 15A , It is pushed into 15B.
As shown in FIG. 4, the rear air-conditioning duct portion 15A extends from both ends of the evaporator 20 as described above, and then the horizontal air-conditioning ducts 15B and 15B extend from both ends of the air-conditioning duct portion 15A toward the front of the body. Thea is, adjusted air is being blow supplied in the cabin 1.

Next, a mounting structure for the rear side window 4 and the rear window 5 will be described. 7 shows that the air conditioning unit A is disposed on the front side of the body at the rear end portion of the annular upper frame 6, and the air conditioning unit A is disposed on the front side of the body of the rear end portion of the annular upper frame 6. In order to adopt the configuration, the rear end portion of the annular upper frame 6 is displaced rearward from the position of the rear window 5. For this purpose, the rear pillar as the longitudinal frame 2 located at the boundary between the rear window 5 and the rear side window 4 and the upper frame 6 are connected by the joint frame 30 to enhance the connection strength between the frames. The rear window 5 is supported so as to be swingable backward by a swing arm 32 pivotally supported by a bracket 31 attached to the horizontal frame 6B of the upper frame 6.

[ Second Reference Form ]
Next, as a second reference embodiment, the air-conditioning unit A, as shown in FIG. 8, is arranged below the suspended frame portion 6D and formed after section frame portion 6B will be described ones are.
The structure of the frame B for mounting the air-conditioning unit A will be described. As shown in FIGS. 8 and 9, the left and right vertical orientations are formed at the connection bent portion between the front and rear frame portion 6A and the rear frame portion 6B in the annular upper frame 6. The frames 2 and 2 are erected to serve as the window frame of the rear side window 4, and the suspended frame portion 6D is extended to the height position that is one step higher than the rear frame portion 6B across the longitudinal frames 2 and 2. It is erected.

Ru supporting tare suspended air-conditioning unit A in a state in which spinning top dive during the lower surface of the suspending frame portion 6D and vertical frame 2, 2 on both sides to support this suspending frame portion 6D.
As shown in FIG. 9, a pair of left and right brackets 27 are attached to the lower surface of the hanging frame portion 6D in a front-rear orientation, and the air conditioning unit A surrounded by the unit case 24 is fixed to the left and right brackets 27, 27 with bolts. It is constituted as follows.

As shown in FIG. 9, so as to surround the air conditioning unit A, Yes disposed and an outer roof section 13 and the inner roof 14, and the ambient air feed opening 13C to the front side of the air-conditioning unit A of the outer roof section 13, the is provided on the external air inlet port for feeding outside air into the outside air supply opening @ 13 C (not shown) overhanging portion overhanging the machine body transverse side of the outer roof section 13 (not shown). The inner roof portion 14 is provided with a circulation port 14A for introducing the air in the cabin 1 in a state of being opposed to the outside air supply port 13C, and the outside air supply port 13C is provided between the outside air supply port 13C and the circulation port 14A. An on-off valve body 17 is provided as a valve mechanism for opening and closing the circulation port 14A. A state in which outside air is taken into the space a formed between the inner roof portion 14 and the outer roof portion 13 through the outside air introduction port 13B, and a state in which the outside air is blocked and the air in the cabin 1 is circulated between the space a. It is comprised so that it may switch to.

The air taken into the space a is sucked into the sirocco fan 23 through a guide hole (not shown) formed in the upper surface of the unit case 24 of the air conditioning unit A, and after being air-conditioned by the evaporator 20 or the like, It is pushed into the air conditioning ducts 15A and 15B.
As shown in FIG. 4, as described above, the rear air-conditioning duct portion 15A extends from both ends of the evaporator 20, and then the horizontal air-conditioning ducts 15B and 15B extend from both side ends of the air-conditioning duct portion 15A toward the front of the body. Dashitea is, adjusted air is being blow supplied in the cabin 1.

  As shown in FIG. 9, a rear window 5 is supported on the lower surface of the portion of the inner roof portion 14 that protrudes rearward from the longitudinal frame 2, and is not shown to suppress the protrusion to the rear side. In this configuration, interference with a link mechanism or the like that supports a tilling device or the like is avoided.

[ Third Reference Form ]
Next, as a third reference embodiment, the air-conditioning unit A, as shown in FIG. 10, for those disposed further rearward of the rear portion frame portion 6B will be described.
The structure of the frame B to which the air conditioning unit A is attached will be described. As shown in FIGS. 10 and 11, the left and right vertical orientations are formed at the connecting bent portion between the front and rear frame portions 6A and 6B in the annular upper frame 6. Frames 2 and 2 are erected to serve as the window frame of the rear side window 4.

As shown in FIG. 11, a pair of left and right brackets 27 are attached to the lower surface of the rear frame portion 6B in the front-rear orientation, and the air conditioning unit A surrounded by the unit case 24 is fixed to the left and right brackets 27, 27 with bolts. It is constituted as follows.
As shown in FIG. 11, so as to surround the air conditioning unit A attached to the rear frame portion 6B, provided with attaching the rear cover 28 to its rear frame portion 6B, the outer roof portion 13 in a state of supporting the rear frame portion 6B And the inner roof portion 14 is disposed in a state of being supported by the rear cover 28.

The outer roof section 13 is provided with a fresh air feed opening 13C, the external air supply port 13C feeding the outside air into the outside air introduction port (not shown) body lateral side Zhang out eaves portion of the outer roof portion 13 (shown )). The inner roof portion 14 is provided with a circulation port 14A for introducing the air in the cabin 1 in a state of being opposed to the outside air supply port 13C, and the outside air supply port 13C is provided between the outside air supply port 13C and the circulation port 14A. An on-off valve body 17 is provided as a valve mechanism for opening and closing the circulation port 14A. A state in which the outside air introduced from the outside air introduction port 13B is taken into the internal space a of the rear cover portion 28 through the space between the inner roof portion 14 and the outer roof portion 13, and the outside air is blocked and the air in the cabin is separated from the internal space a. The on-off valve body 17 is configured to be switched to a state of circulating between them. In the figure, b is an outside air introduction guide, and 14c is an inside air introduction guide.

The air taken into the space a is sucked into the sirocco fan 23 through a guide hole 24a formed on the upper surface of the unit case 24 of the air conditioning unit A, and after being air-conditioned by the evaporator 20 or the like, the air conditioning duct 15A , It is pushed into 15B.
As shown in FIG. 4, in front of the evaporator 20, the rear air-conditioning duct portion 15A is disposed next to the air conditioning duct 15B toward the machine body front from both side ends of the subsequent air-conditioning duct unit 15A, Ri Oh extend the 15B, The adjusted air is blown out into the cabin 1.
A rear window 5 is supported on the lower surface of the connection portion between the inner roof portion 14 and the rear cover portion 28, and is not shown in the figure to suppress rearward overhanging. The structure which avoids interference with these etc. is taken.

[Another embodiment]
Another embodiment described below is applied to the above-described embodiment of the present invention .

(1) As a framework configuration of the cabin 1, the following may be used.
12 (a) and 12 (b), the left and right front struts 2 and 2 that support the front window 25 in the frame B extend to the upper side of the left and right front and rear frame portions 6A and 6A of the upper frame 6, The left and right front upper frame portion 6E that connects the upper ends of the front struts 2 and 2 is installed so as to be positioned above the left and right front and rear frame portions 6A and 6A. As a result, the left and right front / rear frame portions 6A and 6A are positioned upward, and accordingly, the front window 25 can be set high upward, and the field of view to the driver can be improved. Can do.
As shown in FIGS. 13 (a) and 13 (b), the front struts 2, 2 are bent so that the upper end portions 2A, 2A are inclined backward, and the front struts 2, 2 are compared to the lower end portions. The end portion 2A is configured to be located on the rear side of the machine body, and the front upper frame portion 6E is installed over the upper ends of the front struts 2 and 2, and the front upper frame portion 6E and the left and right front-rear frame portions 6A , 6A is set at the same height position.
With such a configuration, the front upper frame portion 6E can be positioned rearward relative to the lower ends of the front struts 2 and 2, and the driver's looking-up field of view can be widened and easily viewed upward. Become.

(2) In the said embodiment, although the form which utilized this invention for the agricultural tractor was demonstrated, you may apply to other agricultural machines and construction machines, such as a combine.

DESCRIPTION OF SYMBOLS 1 Cabin 2 Vertical frame 6 Upper frame 6B Horizontal frame 7 Roof part 12 Driver's seat 15 Air conditioning duct
40 Lower frame
41 Lower horizontal frame
42 Front-rear frame A Air conditioning unit B Frame frame

Claims (1)

A cabin air conditioner for a work vehicle having a driver's seat in the cabin and an air conditioning duct in the roof of the cabin and an air conditioning unit that adjusts the air and sends the adjusted air to the air conditioning duct. Structure,
The air conditioning unit is arranged on the rear side of the fuselage from the rear end of the seating portion of the driver seat,
The frame constituting the cabin is provided across a plurality of vertical frames, a lower frame that supports at least a lower end portion of the plurality of vertical frames, and an upper end portion of the plurality of vertical frames. An annular upper frame, and the lower frame includes a pair of left and right front-rear frames and a lower horizontal frame connecting the pair of front-rear frames. The left and right vertical frames on the most rear side of the aircraft are erected from the connecting position of the front and rear frame and the lower horizontal frame, and the horizontal frame at the rear of the annular upper frame is connected to the plurality of vertical frames. From the left and right vertical frames on the most rear side of the aircraft, project in a U shape in plan view on the rear side of the aircraft,
An air conditioning structure for a cabin of a work vehicle in which the air conditioning unit is arranged in a space formed on the rear side of the left and right vertical frames on the most rear side of the machine body and on the front side of the horizontal frame.

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