Work vehicle

Abstract

It was requested that the operator be able to perform control operations effectively even when the outside temperature was high. [Solution] The aircraft is equipped with a driver's seat 7, a cabin 8 covering the driver's seat 7, an air conditioning unit 28 for air conditioning the interior of the cabin 8, and a ventilation duct 33 positioned on the roof portion 25 of the cabin 8 for blowing conditioned air from the air conditioning unit 28 into the interior of the cabin 8. The outlet 34b of the ventilation duct 33 is located behind the driver's seat 7a and is provided on the mounting surface 38 on the bottom surface of the ventilation duct 33, with the normal H of the mounting surface 38 facing inward in the left-right direction of the aircraft and towards the front in the front-rear direction of the aircraft.

Description

Technical Field

[0001] The present invention relates to working vehicles such as combines, tractors, and rice transplanters.

Background Art

[0002] Some working vehicles are equipped with a cabin that covers the driver's cab. In this case, inside the cabin, there are provided an air conditioner unit that air - conditions the interior of the cabin and a ventilation duct that blows the conditioned air of the air conditioner unit into the interior of the cabin. Conventionally, the air outlet provided in the ventilation duct was configured to blow the conditioned air inward in the left - right direction of the cabin (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above - mentioned conventional configuration, the conditioned air blown out from the air outlet fills the inside of the cabin, thereby adjusting the internal space of the cabin to an appropriate temperature so that the operator can perform the operation in a comfortable environment. However, for example, in summer when the external temperature is high, there is a possibility that the air - conditioning capacity of the air conditioner unit is insufficient and a sufficient air - conditioning effect cannot be obtained. Then, in the work in a closed space, the operator may feel thermally uncomfortable.

[0005] Therefore, there has been a demand to enable the operator to perform the operation well even when the outside air temperature is high.

Means for Solving the Problems

[0006] The characteristic configuration of the work vehicle according to the present invention is that it comprises an operating section having a driver's seat, a cabin covering the operating section, an air conditioning unit for air conditioning the interior of the cabin, and a ventilation duct positioned on the roof of the cabin for blowing conditioned air from the air conditioning unit into the interior of the cabin, wherein the outlet of the ventilation duct is located behind the driver's seat and is provided on the mounting surface at the bottom of the ventilation duct, and the normal of the mounting surface is inward in the left-right direction of the machine body and forward in the front-rear direction of the machine body.

[0007] According to the present invention, conditioned air is blown out from a ventilation duct located on the roof of the cabin through an outlet. The outlet is located behind the driver's seat and blows the conditioned air inward in the lateral direction of the aircraft and towards the front in the longitudinal direction of the aircraft.

[0008] In work vehicles, operators who operate the vehicle from the driver's seat often operate the vehicle while seated in the driver's seat, or while standing and leaning forward to visually check the front of the vehicle. In the work vehicle according to the present invention, the ventilation duct outlet is located behind the driver's seat and is provided on the mounting surface at the bottom of the ventilation duct, with the normal of the mounting surface facing inward in the left-right direction of the vehicle and towards the front in the front-rear direction of the vehicle. Because the outlet is provided in this way, the conditioned air blown out from the outlet is mainly blown at the operator's neck.

[0009] As a result, even if, for example, the outside temperature is high and the air conditioning capacity may be insufficient, the conditioned air (cool air) can be efficiently blown towards the operator's neck area. The neck is known to be a place where localized cooling is easily achieved from a biological standpoint. In other words, it becomes possible to lower body temperature efficiently.

[0010] Therefore, it has become possible to ensure that operators can perform control operations effectively even when the outside air temperature is high.

[0011] In the present invention, it is preferable that the arrangement surface is provided in a location where the ventilation duct is narrowed from the main duct portion on the air conditioner unit side toward the end duct portion.

[0012] In this configuration, since the air outlet is provided in the area where the narrowing process has been applied, the airflow resistance near the outlet increases as the conditioned air supplied from the air conditioning unit flows. As a result, it becomes possible to blow out a large amount of air from the outlet, allowing for efficient cooling of the operator's neck.

[0013] In the present invention, it is preferable that the duct cross-sectional area immediately after the outlet in the ventilation duct is smaller than the duct cross-sectional area immediately before the outlet.

[0014] In this configuration, the duct cross-sectional area is smaller downstream of the outlet in the direction of airflow, resulting in increased airflow resistance. As a result, it becomes easier to blow out a large volume of air from the outlet.

[0015] In the present invention, it is preferable that the operating unit is equipped with a steering control device, and that the tip of the ventilation duct is located behind the steering control device.

[0016] This configuration makes it easier to supply conditioned air from the rear towards the neck of the operator, who is operating the steering controls by hand.

[0017] In the present invention, it is preferable that the air conditioning unit is located at the rear of the cabin.

[0018] This configuration eliminates the need for large equipment on the front of the cabin's roof, making it easier for the operator to control the aircraft. [Brief explanation of the drawing]

[0019] [Figure 1] This is a side view of the entire combine harvester. [Figure 2] It is an overall plan view of the combine. [Figure 3] It is a plan view showing the arrangement state of the ventilation duct. [Figure 4] It is a bottom view showing the state of the ventilation duct as viewed from the inside of the cabin. [Figure 5] It is an exploded perspective view looking up from the lower left of the ventilation duct and the inner roof. [Figure 6] It is a longitudinal sectional side view of the operation unit showing the operation state.

Embodiments for Carrying Out the Invention

[0020] Hereinafter, an embodiment of a combine, which is an example of a work vehicle according to the present invention, will be described based on the drawings. Note that the present invention is not limited to the following embodiments, and various modifications are possible without departing from the gist thereof. In the following description, unless otherwise specified, the direction of arrow F in the figure is "front", the direction of arrow B is "rear", the direction of arrow L is "left", and the direction of arrow R is "right". The direction of arrow U in the figure is "up", and the direction of arrow D is "down".

[0021] 〔Overall Configuration〕 In FIGS. 1 and 2, a general-purpose combine for harvesting rice, wheat, etc. is shown. This combine includes a traveling body equipped with a pair of left and right crawler-type traveling devices 2 at the lower part of the machine body frame 1, and a cutting and conveying unit 3 for cutting the standing cereal straws to be harvested and conveying them backward is connected to the front part of the traveling body so as to be swingable up and down around the horizontal axis P1. And on the machine body frame 1, a threshing device 4 that performs handling processing on the cut cereal straws from the cutting and conveying unit 3 and also performs sorting processing on the threshed product obtained by the handling processing, a grain tank 5 that stores the grains from the threshing device 4, a grain discharging device 6 for discharging the grains stored in the grain tank 5 to the outside of the machine, an operation unit 7 on which an operator rides to perform operation, etc. are provided.

[0022] The driver's unit 7 is located on the front right side of the machine and is covered by the cabin 8. The grain tank 5 is located behind the driver's unit 7. The threshing device 4 is located on the left side and the grain tank 5 is located on the right side, with the threshing device 4 and grain tank 5 arranged side by side. As shown in Figure 2, the drive engine 9 is located below the driver's unit 7, and the power from the engine 9 is transmitted to the various parts.

[0023] The harvesting and conveying unit 3 is comprised of a rotating reel 10 that sweeps the planted grain stalks to be harvested towards the rear, a clipper-type harvesting device 11 that cuts the base of the planted grain stalks to be harvested, a lateral auger 12 that gathers the cut grain stalks at a predetermined location in the center of the left-right direction and sends them towards the rear, and a feeder 13 that conveys the harvested grain stalks toward the threshing device 4. The harvesting and conveying unit 3 is supported by a lifting hydraulic cylinder 14 so that it can swing up and down around a horizontal axis.

[0024] The threshing device 4, though not described in detail here, is configured such that, in the upper part of the internal space enclosed by the left and right side walls and the top plate, a threshing drum 15 that rotates around a front-to-back axis threshes the harvested grain stalks conveyed from the feeder 13, and then separates the threshed material into grain, second-grade material, and straw waste. The grain is stored in the grain tank 5. The second-grade material is returned to the inside of the threshing device 4, and the straw waste and other materials are discharged to the rear of the machine. After the harvesting operation is completed, the grain stored in the grain tank 5 is discharged outside the machine by a well-known screw conveyor type grain discharge device 6.

[0025] [Driver's Unit] As shown in Figure 3, the driver's unit 7 is equipped with a cross-shaped swing lever 16 in front of the driver's seat 7a, which is a steering control device that can be swung in a cross shape in the forward / backward and left / right directions.

[0026] The vehicle body can be turned by swinging the cross-shaped swing lever 16 along the left-right direction. Although not shown, the cross-shaped swing lever 16 and a hydraulic steering mechanism (not shown) provided in the transmission are linked via an operating wire (not shown). Swinging the cross-shaped swing lever 16 to the right or left allows the vehicle body to be turned to the right or left in conjunction with pushing and pulling the operating wire.

[0027] The harvesting and conveying unit 3 can be raised and lowered by swinging the cross-shaped swing lever 16 along the front-rear direction. Although not shown in the figures, when a detection sensor provided at the base end of the cross-shaped swing lever 16 detects the front-rear swing operation of the cross-shaped swing lever 16, a control device (not shown) controls the lifting hydraulic cylinder 14. When the cross-shaped swing lever 16 swings backward, the harvesting and conveying unit 3 rises, and when the cross-shaped swing lever 16 swings forward, the harvesting and conveying unit 3 lowers.

[0028] A side panel 17 is provided on the side of the driver's seat 7a. This side panel 17 is equipped with a work clutch lever 18 for switching the power transmission of the threshing device 4 and the harvesting and conveying unit 3 on and off, a main transmission lever 19 for operating the main transmission (not shown), a sub-transmission lever 20 for operating the sub-transmission (not shown), and the like.

[0029] 〔cabin〕 Let me explain Cabin 8. As shown in Figure 4, the cabin 8 forms a driver's compartment consisting of a front section 21 located in front of the driver's seat 7a, left and right side sections 22 and 23 located on both sides of the driver's seat 7a, a rear section 24 located behind the driver's seat 7a, and a roof section 25 that covers the entire upper surface. An opening for boarding and alighting is formed in the right side section 22 of the cabin 8, and this opening is closed by a door 26 that can swing open and closed around a vertical axis on the front side of the aircraft. When the door 26 is closed, the driver's compartment becomes a closed space.

[0030] A lighting fixture 27 is provided at the front end of the roof section 25, and an air conditioning unit 28 for air conditioning the interior of the driver's cab is provided at the rear of the roof section 25. As shown in Figures 3 and 6, the air conditioning unit 28 is fixedly supported by a support member 30 fixed to a frame 29 surrounding the roof section 25. The space in which the air conditioning unit 28 is installed is partitioned by the support member 30 and a roof cover 31 that covers the top of the roof section 25.

[0031] The air conditioning unit 28 has an air intake outlet 32 ​​formed on the front side of the aircraft body to discharge the conditioned air (e.g., cold air) that has been treated with air conditioning towards the front of the aircraft body. A ventilation duct 33 is provided to blow the air discharged from the air intake outlet 32 ​​of the air conditioning unit 28 into the cabin 8. Multiple air outlets 34 are formed on the side of the roof section 25 to blow the air supplied from the air conditioning unit 28 through the ventilation duct 33 into the cabin 8.

[0032] The ventilation duct 33 is supported by being sandwiched between the inner roof 35 and the roof cover 31, which are located inside the roof section 25.

[0033] As shown in Figures 3 and 5, the ventilation duct 33 is provided with a horizontally elongated duct portion 36 located on the front side of the air conditioning unit 28, and the horizontal duct portion 36 and the air conditioning unit 28 are connected in communication so that the air supplied from the air supply outlet 32 ​​of the air conditioning unit 28 is discharged into the ventilation duct 33 through a passage hole formed in the front side wall of the horizontal duct portion 36.

[0034] On both sides of the horizontal duct section 36 in the width direction of the aircraft body, there are front-to-back duct sections 37 on both the left and right sides that supply intake air to outlets formed on the sides of the roof section 25. The horizontal duct section 36 and the front-to-back duct sections 37 are integrally formed in a continuous manner. In other words, the ventilation duct 33 is composed of a horizontal duct section 36 and front-to-back duct sections 37 on both the left and right sides, and these duct sections are integrally formed in a continuous manner.

[0035] The ventilation duct 33 is configured to receive the supply air discharged from the air intake outlet of the air conditioning unit 28 at the front wall of the horizontal duct section 36, and then guide the supply air to flow from both outer sides in the width direction of the unit through the front and rear duct sections 37 on both sides toward the side outlets on both sides.

[0036] As shown in Figure 3, the left and right front-to-back duct portions 37 extend forward from the side-to-side duct portion 36 to a position midway along the front-to-back of the operating unit 7. The front outlet 34a of the outlet 34 is formed at the front end of the left and right front-to-back duct portions 37. As shown in Figure 6, the tip of the ventilation duct 33, that is, the front end of the left and right front-to-back duct portions 37, is located behind the cross-shaped swing lever 16.

[0037] The rear outlet 34b of the outlet 34 is formed in the front-to-rear intermediate part of the left and right front-to-rear oriented duct sections 37. The rear outlet 34b is provided on the placement surface 38 at the bottom of the ventilation duct 33.

[0038] As shown in Figure 4, the arrangement surface 38 where the rear outlet 34b is formed is located in the ventilation duct 33 where it is tapered from the main duct portion 39 on the air conditioner unit 28 side toward the end duct portion 40. The area extending from the connection point between the front-to-back duct portion 37 and the side-to-side duct portion 36 to the location where the rear outlet 34b is formed corresponds to the main duct portion 39. The area extending from the location where the rear outlet 34b is formed toward the front end corresponds to the end duct portion 40.

[0039] The main duct section 39 has a larger duct cross-sectional area than the end duct section 40. In other words, the duct cross-sectional area immediately after the rear outlet 34b in the ventilation duct 33 is configured to be smaller than the duct cross-sectional area immediately before the rear outlet 34b.

[0040] As shown in Figure 5, the mounting surface 38 where the rear air outlet 34b is formed is located in the section of the ventilation duct 33 that is narrowed from the main duct portion 39 on the air conditioner unit 28 side toward the end duct portion 40.

[0041] The normal H of the arrangement surface 38 on which the rear outlet 34b is formed is directed inward in the left-right direction of the aircraft and forward in the front-rear direction of the aircraft. As a result, as shown in Figures 4 and 6, the supply air (cold air) blown out from the rear outlet 34b is blown inward in the left-right direction of the aircraft and downward and forward in the front-rear direction of the aircraft.

[0042] As shown in Figure 6, it is common for the operator to operate the vehicle while gripping and operating the cross-shaped swing lever 16 in a slightly bent-over position. With the above configuration, the air supply from the rear outlet 34b can be efficiently blown towards the neck area of ​​the operator who is seated in the driver's seat 7a and operating the vehicle.

[0043] [Another embodiment] (1) In the above embodiment, the installation surface corresponding to the rear outlet 34b is provided at a location where the ventilation duct 33 is narrowed, but the ventilation duct 33 may not be narrowed.

[0044] (2) In the above embodiment, the duct cross-sectional area immediately after the rear outlet 34b in the ventilation duct 33 is smaller than the duct cross-sectional area immediately before the outlet. However, the duct cross-sectional area immediately after and the duct cross-sectional area immediately before may be the same or approximately the same.

[0045] (3) In the above embodiment, the tip of the ventilation duct 33 is positioned behind the cross-shaped swing lever 16, but it may also be positioned in front of the cross-shaped swing lever 16.

[0046] (4) In the above embodiment, the air conditioning unit 28 is located at the rear of the cabin 8, but it may also be located at the front of the cabin 8. [Industrial applicability]

[0047] This invention is not limited to combine harvesters, but can also be applied to other types of work vehicles such as tractors and rice transplanters. [Explanation of Symbols]

[0048] 7. Driver's Unit 7a Driver's seat 8 cabins 16. Cross-shaped swing lever (steering control device) 25 Roof section 28 Air conditioning unit 33 Air supply duct 34b Air vent 38 Placement plane 39 Main duct section 40 End duct section H normal

Claims

1. A driver's compartment with a driver's seat, The cabin covering the aforementioned driver's section, An air conditioning unit for air conditioning the interior of the cabin, The cabin is provided with a ventilation duct located on the roof portion for supplying conditioned air from the air conditioning unit into the cabin's interior, The outlet of the ventilation duct is located behind the driver's seat, and is provided on the mounting surface at the bottom of the ventilation duct. A work vehicle in which the normal to the aforementioned arrangement surface is directed inward in the left-right direction of the machine and towards the front in the front-rear direction of the machine.

2. The work vehicle according to claim 1, wherein the arrangement surface is provided in a location in the ventilation duct where a narrowing process is applied from the main duct portion on the air conditioner unit side toward the end duct portion.

3. The work vehicle according to claim 2, wherein the duct cross-sectional area immediately after the outlet in the ventilation duct is smaller than the duct cross-sectional area immediately before the outlet.

4. The aforementioned driver's unit is equipped with steering control devices, The work vehicle according to claim 1, wherein the tip of the ventilation duct is located behind the steering control device.

5. The work vehicle according to claim 1, wherein the air conditioning unit is located at the rear of the cabin.

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