JP2013126875A5 - - Google Patents

Description

Work vehicle

The present invention relates to a work vehicle Ru equipped with air conditioning unit on the roof of the cabin.

There exists a thing of patent document 1 as a work vehicle provided with the air-conditioning unit.

Japanese Utility Model Publication No. 7-27215 (line 4 of the gazette, line 46 to line 3 of column 5 and FIG. 1)

A characteristic configuration of the work vehicle according to the present invention is configured such that the roof portion includes an inner roof, an outer roof, and a lower cover that covers a rear end portion of the outer roof that extends rearward from the rear window from below. An air conditioning unit is disposed in a storage space formed behind the driver seat by the rear end portion of the inner roof, the rear portion of the outer roof, and the lower cover,
  The rear end portion of the inner roof is extended below the front end portion of the lower cover,
  A connecting member to which a rear end portion of the inner roof is connected and a front end portion of the lower cover is connected is provided. In the connecting member, a connecting portion with the inner roof is more than a connecting portion with the lower cover. It is in the point arranged on the lower side.

Overall side view of tractor Plan view showing the rear of the cabin Longitudinal side view showing the air conditioning unit in the rear of the cabin Rear view of cabin with drainage mechanism Left side view showing the drainage mechanism on the left side of the aircraft Right side view showing the drainage mechanism on the right side of the aircraft Plan view showing the inner surface of the lower cover Vertical side view showing the first seal member and the second seal member interposed between the lower cover and the outer roof A bottom view showing the second seal member mounted on the outer roof Vertical side view showing a shutter provided between the inside air supply port and the outside air supply port Configuration diagram showing a crank arm or the like for driving a shutter provided between the inside air supply port and the outside air supply port Cross-sectional plan view showing the state of attachment of the hose at the front end of the drainage mechanism to the rear pillar

  FIG. 1 shows an overall side view of a tractor that mainly performs tillage work as an example of a work vehicle. This tractor uses power from an engine 2 mounted on a front frame 1 for vibration isolation as a transmission for a frame. The vehicle is configured as a four-wheel drive type that transmits to a pair of left and right front wheels 4 and rear wheels 5 via a traveling transmission system including a traveling transmission (not shown) installed in the case 3.

  As shown in FIGS. 1 and 2, a pair of left and right lift arms 6, which are driven to swing up and down by the operation of a hydraulic lifting cylinder (not shown) housed in the upper portion, are disposed at the rear of the transmission case 3. And a power take-out shaft 7 that allows the engine power to be taken out to the outside.

  The power take-off shaft 7 is a work in which the power from the engine 2 is composed of a work transmission (not shown), a work clutch (not shown), etc., which are housed in a transmission case 3 separate from the traveling transmission system. It is transmitted through the transmission system.

Although not shown, the left and right lift arms 6 are connected to a link mechanism that is connected to the rear portion of the transmission case 3 so as to be movable up and down, and the power take-out shaft 7 is connected to a rotary mechanism connected to the link mechanism. An input shaft provided in a working device such as a tillage device is connected via a transmission shaft or the like.

  As shown in FIGS. 1 and 2, a boarding operation unit 10 including a steering wheel 8 and a driver seat 9 is formed in the rear half of the tractor, and a cabin 11 covering the boarding operation unit 10 is provided. .

  As shown in FIG. 1, the cabin 11 includes a cabin frame 19 that includes a windshield 20 made of transparent curved glass, a pair of left and right door panels 21 made of transparent flat glass, a transparent curved glass, and the like. And a pair of left and right side windows 22 of an outward opening type and an outward opening type rear window 23 made of a transparent curved glass or the like.

  The cabin frame 19 includes a pair of left and right front pillars 24 made of deformed pipes, a pair of left and right quarter pillars 25, a pair of left and right rear pillars 26 made of square pipes, a front cross member 27 having a U-shaped cross section, and a U-shaped cross section. A pair of left and right side members 28 and a rear cross member 29 having a U-shaped cross section are welded to each other, and the front cross member 27, the left and right side members 28, and the rear cross member 29 are The roof portion 32 is formed by attaching the inner roof 30 and the outer roof 31.

The left and right door panels 21 are connected to corresponding quarter pillars 25 via a pair of upper and lower hinges 33 so as to be openable and swayable.
The left and right side windows 22 are connected to corresponding rear pillars 26 via a pair of upper and lower hinges 34 so as to be openable and swingable.
The rear window 23 is connected to the rear cross member 29 through a pair of left and right hinges 35 so as to be capable of opening and closing.
The left and right rear pillars 26 are set so that the distance between them is narrower than the distance between the left and right front pillars 24 and the distance between the left and right quarter pillars 25.

  As shown in FIG. 3, the rear cross member 29 is placed and set at a height position that is lowered by a predetermined distance from the upper ends of the left and right rear pillars 26 in order to secure an arrangement space for the air conditioning unit 36 between the rear cross member 29 and the outer roof 31. In addition, three support stays 37 for supporting the air conditioning unit 36 are provided on the upper portion thereof.

As shown in FIGS. 1 to 3, the inner roof 30 has a peripheral edge joined to the lower surface of a front cross member 27, left and right side members 28, and a rear cross member 29 (corresponding to a connecting member) , In order to make the living space as wide as possible while securing a space for air conditioning duct arrangement between the peripheral edge portion and the outer roof 31, the central portion is formed in a shape that bulges toward the outer roof 31.

  The outer roof 31 is supported by the upper surfaces of the front cross member 27 and the left and right side members 28 at the periphery thereof, and has an outside air introduction path 38 at the front and rear intermediate portions thereof, and the rear end portion thereof is more than the rear window 23. It extends rearward and functions as an upper cover that covers the upper part of the air conditioning unit 36.

A lower cover 39 that covers the rear lower portion of the air conditioning unit 36 is connected to the outer roof 31 and the support stay 37 (corresponding to a connecting member). The rear end portion of the inner roof 30, the rear portion of the outer roof 31, and the lower cover 39 A storage space 40 for the unit 36 is formed.

As shown in FIGS. 2 to 6, a pair of left and right inside air supply ports 41 that allow supply of cabin inside air to the air conditioning unit 36 are formed in the rear center of the inner roof 30.
As shown in FIGS. 9 and 10, a pair of left and right outside air supply ports 42 that allow supply of outside air to the air conditioning unit 36 are opposed to the inside air supply ports 41 of the inner roof 30 at the center of the rear portion of the outer roof 31. It is formed with.

As shown in FIGS. 1, 9, and 10, a pair of left and right ridges 43 that prevent rainwater from entering the cabin when the left and right side windows 22 are opened are formed in the rear portion of the outer roof 31. .
The left and right saddles 43 are formed in a hollow shape communicating with the outside air introduction path 38, and the outside air introduction port 44 is formed only on the bottom wall of the left side saddle 43, and an air filter 45 is provided.
In this way, the outside air inlet 44 is formed only in the left ridge 43 and the air filter 45 is provided, so that when the air filter 45 is cleaned or replaced in the field, the left side of the vehicle body is adjacent to the ridge. If the vehicle body is stopped in such a state, the air filter 45 can be cleaned or replaced on the eaves that can easily reach the eaves 43 as soon as it gets off the eaves from the left entrance and exit.

  As shown in FIGS. 2, 9, and 10, the outside air supply port 42 is opened between the inside air supply port 41 and the outside air supply port 42 to allow the supply of outside air to the air conditioning unit 36, and the inside air supply The outside air mixing state in which the opening area of the opening 41 is reduced to suppress the supply of the cabin inside air from the inside air supply port 41, and the outside air supply port 42 is closed to prevent the outside air from being supplied to the air conditioning unit 36 and the inside air supply port A vertically swinging shutter 46 configured to be switched to an inside air circulation state in which 41 is largely opened is provided.

  As shown in FIGS. 2, 9, and 10, the shutter 46 is an electric shaft that swings up and down around a support shaft 48 that is directed to the left and right by the operation of the electric motor 47, and is a linkage shaft provided at the free end thereof. 49 is linked to the operating arm 53 of the electric motor 47 through a crank arm 51 that swings around a fulcrum pin 50 that faces in the front-rear direction and a connecting wire 52, and is returned to the inside air circulation state by a spring (not shown). It is energized.

  As shown in FIGS. 2 and 3, the air conditioning unit 36 includes a sirocco fan 57 and an evaporator in a casing 56 in which an air intake portion 54 is opened at an upper right portion and a pair of left and right pipe-shaped blowout portions 55 are formed at a front portion. 58, a heater 59, and the like, and are supported by the respective support stays 37 so that the rear end portion thereof is positioned rearwardly larger than the rear window 23 of the cabin 11 between the left and right rear pillars 26, 26. As a result, the entirety is positioned behind the driver seat 9.

  As shown in FIGS. 2 and 3, the arrangement of the air conditioning unit 36 allows the living space to be reduced while making the overall height of the cabin 11 as low as possible as compared with the case where the air conditioning unit 36 is arranged at the front end portion of the roof portion 32. It is possible to secure a large air conditioning unit 36 having a high capacity, and it is possible to equip with a large capacity air conditioning unit 36. Further, since the field of view to the front and upper side is widened, for example, a front loader (not shown) is connected and equipped. During loader work, it is easy to visually recognize the raised bucket position, and workability is improved.

  As shown in FIGS. 2 and 3, the sirocco fan 57 is arranged on the right side of the evaporator 58, and unadjusted air taken in from the intake portion 54 is transferred between the evaporator 58 and the rear wall 60 of the casing 56 facing the evaporator 58. Then, the air is supplied to the evaporator 58 and the heater 59 through the air supply path 61 formed in the above.

As shown in FIGS. 2 and 3, the rear wall 60 of the casing 56 functions as a guide wall that guides unadjusted air from the sirocco fan 57 to the entire area of the evaporator 58 substantially uniformly.
The left end side away from the sirocco fan 57 is formed in a multistage shape that approaches the evaporator 58.

  Thus, by forming the rear wall 60 of the casing 56 in a multistage shape, a relatively large space 62 is formed between the outer surface of the left end portion of the rear wall 60 and the rear wall surface of the roof portion 32. It will be.

  Therefore, by effectively utilizing this space, the rear wall 60 of the casing 56 is equipped with an electric motor 47 for operating the shutter, thereby forming a dedicated space for housing the electric motor 47. It is possible to avoid complication of the part shape and enlargement of the roof part 32.

  Further, since the sirocco fan 57 is disposed on the right side of the evaporator 58, the sirocco fan 57 is positioned at the right end opposite to the outside air introduction port 44 formed at the left end of the outer roof 31, thereby In the mixed state, the outside air introduced from the outside air introduction port 44 is supplied to the evaporator 58 and the heater 59 through the outside air introduction path 38 and the air supply path 61 while being preheated at the internal temperature of the cabin 11. Therefore, compared with the case where the sirocco fan 57 is disposed in the vicinity of the outside air introduction port 44, the air conditioning efficiency can be improved.

  As shown in FIGS. 2 and 3, a pair of left and right air-conditioning ducts 63 that guide the adjusted air from the corresponding blowing portions 55 toward the front end portion of the cabin 11 are externally fitted to each blowing portion 55 of the casing 56. ing.

  As shown in FIGS. 2 to 6, the evaporator 58 is provided with a drainage mechanism A that discharges the condensed water generated in the case. The drainage mechanisms A are respectively provided corresponding to drainage outlets 75 and 76 for discharging condensed water formed at the left and right ends of the bottom of the evaporator 58.

As shown in FIGS. 3 to 6, the drainage mechanism A is connected to the left and right drainage ports 75, 76, and the left and right device side drainage hoses 65, 65 as the first drainage unit in a posture that is substantially horizontal and sideways. Is provided. The left and right device side drain hoses 65, 65 have base end portions 65A, 65A connected to the left and right drain ports 75, 76 positioned in the internal space of the lower cover 39, and are in a state along the bottom surface in the internal space. As shown in FIG. 7, the lower cover 39 is provided with mounting grooves 39 </ b> C and 39 </ b> C. The distal end portions of the left and right device side drain hoses 65, 65 protrude from the outlets 39D, 39D formed in the lower case 39, and extend obliquely forward and downward.

As shown in FIGS. 3 to 6, left and right elbow-shaped metal pipes 66, 66 are arranged in a diagonally downward posture toward the front lower side on the lower side of the drainage direction from the left and right equipment side drain hoses 65, 65. The 2nd drainage part is comprised.
Left and right tip hoses 67, 67 are arranged in a vertically oriented position on the lower side of the drain direction from the left and right metal pipes 66, 66, and are connected to the left and right metal pipes 66, 66, respectively.

As shown in FIGS. 3 to 6, left and right work lights 84, 84 described later are disposed above the left and right metal pipes 66, 66, respectively, and the left and right brackets 68 that support the left and right work lights 84, 84. , 68 are provided. Plate portions 68A and 68A are suspended downward from the left and right brackets 68 and 68, and left and right metal pipes 66 and 66 are integrally fixed to the lower ends of the plate portions 68A and 68A, respectively.
In the figure, 83 is a blinker.

  As shown in FIGS. 3 to 6, the left and right tip-side hoses 67, 67 externally fitted to the lower ends of the left and right metal pipes 66, 66 are joined to the outer surfaces of the corresponding left and right rear pillars 26, 26. It extends between the window 22 and the rear window 23 to the lower side of the aircraft. As shown in FIG. 12, the cross-sectional shape of the left and right tip side hoses 67, 67 is a cylindrical part, and the base end portion bonded to the rear pillars 26, 26 is attached to the mounting seats 67A, 67A having a certain lateral width. Thus, the mounting state to the rear pillars 26 and 26 is stabilized.

  That is, as shown in FIGS. 3 to 6, the drainage ports 75 and 76 are provided at both the left and right ends of the bottom of the evaporator 58, so that the dew condensation water generated in the evaporator 58 is discharged to the drainage port corresponding to the horizontal inclination of the vehicle body. 75, 76 can be guided to the outer surfaces of the left and right rear pillars 26 via the left and right drainage mechanisms A, A, and as shown in FIG. 1, the inner surfaces of the left and right rear fenders 80 from the lower ends of the left and right rear pillars 26. Can be quickly discharged outside the vehicle.

  Further, the left and right tip-side hoses 67, 67 can be made inconspicuous by passing between the side window 22 and the rear window 23, and deterioration in appearance due to the use of an external piping structure can be suppressed. .

The waterproof seal mechanism B formed between the outer roof 31 and the lower cover 39 will be described. As shown in FIGS. 3, 7, and 8, the waterproof seal mechanism B is provided on a connection surface between the outer roof 31 and the lower cover 39, and includes a first seal member 69 disposed on the first mating surface. The second seal member 70 disposed on the second mating surface formed on the inner side of the first mating surface, and the water catching space C formed between the first seal member 69 and the second seal member 70. Composed.

As shown in FIGS. 7 and 8, the water catching space C includes an outer wall portion 39A in the lower cover 39 and an inner wall portion that branches from the outer wall portion 39A and stands on the inner side of the outer wall portion 39A. 39B, and is configured to collect moisture that has entered the first seal member 69.

With such a configuration, water is less likely to enter the air conditioning unit storage space even during high-pressure car washing.
In addition, the water accumulated in the catching space C is discharged as follows. As shown in FIG. 7 and FIG. 8, the water catching space C is formed along the first mating surface so that the bottom face of the water catching space C is located at a lower position toward both ends of the water catching space C. . And the discharge port Cc and Cc which discharge | emit out of the machine from the lower cover 39 in the lowest site | part corresponding to both above-mentioned both ends is provided, and it is comprised so that the water leak captured by the catching space C may be discharged | emitted.

  The first seal member 69 and the second seal member 70 will be described. As shown in FIGS. 7 and 8, the first seal member 69 is provided along the peripheral edge of the lower cover 39 disposed behind the left and right rear pillars 26, 26, and is formed as a first mating surface. It is formed in a flat plate shape having a constant width along the flat surface, and is provided with a hole 69A through which a connecting fixture or the like passes at every predetermined interval.

The second seal member 70 will be described. As shown in FIG. 1, the outer roof 31 is mainly supported by a front cross member 27 and left and right side members 28, 28 constituting the cabin 11, and a portion protruding from the rear of the rear pillar 26 is supported by a lower cover 39. ing. As shown in FIGS. 7 to 9, the second seal member 70 includes a rear seal portion 70A provided corresponding to the second mating surfaces of the outer roof 31 and the lower cover 39, the front cross member 27, the left and right And a main body seal portion 70B provided in a state extending over the mating surfaces with the side members 28, 28. That is, the second seal member 70 is an endless connection between the rear seal portion 70 </ b> A and the main body seal portion 70 </ b> B, and is mounted in a holding groove formed corresponding to the peripheral edge portion of the outer roof 31.

  As shown in FIG. 3, the rear cross member 29 is subsequently formed with a step at the upper edge, and a sealing material 82 is interposed between the rear cross member 29 and the lower cover 39 using this step. .

  By interposing the waterproof mechanism B and the sealing material 82 in this manner, the airtightness and waterproofness of the air conditioning unit storage space 40 formed by the rear end portion of the inner roof 30, the rear portion of the outer roof 31, and the lower cover 39 are improved. Can be secured.

[Another embodiment]
[1] The work vehicle may be a combine, a backhoe or a transport vehicle.
[ 2 ] The first to third drainage sections may all be constituted by a drainage hose, or may be entirely constituted by a metal pipe, and are not limited to either.

  9 Driver's seat
  23 Rear window
  29, 37 connecting members
  30 Inner roof
  31 Outer roof
  32 Roof section
  36 Air conditioning unit
  39 Bottom cover
  40 storage space