JP4681523B2 - Waterproof seal structure for work vehicles - Google Patents

Description

The present invention accommodates an air conditioning unit that supplies conditioned air into an operation cabin between a rear projecting portion of the outer roof that projects rearward from the rear pillar and a lower cover that covers the lower side of the rear projecting portion, The present invention relates to a waterproof seal structure for a work vehicle provided with a waterproof seal mechanism at a position where a rear protruding portion and the lower cover are combined.

And A Utarufu portion and Lee N'narufu unit, mounted on the upper frame, to form a device receiving space in the inner space of the outer roof portion and the inner roof section, between the outer roof section and the upper frame, the sealing ring as a waterproof seal mechanism (See Patent Document 1).

Japanese Patent Laying-Open No. 2005-22463 (paragraph numbers [0016] [0017] and FIG. 5)

  A certain level of waterproof function can be expected by interposing a seal ring in this way, but when performing work by spraying high-pressure water at the time of car washing, etc., the waterproof seal function may not be fully demonstrated. Therefore, it was necessary to consider further strengthening the waterproof seal function.

An object of the present invention, by adoption of a configuration in which a plurality of functions as a waterproof seal mechanism combine different sealing material is that it provides a waterproof seal structure of the working vehicle which strengthen the waterproof sealing function.

In the invention according to claim 1 of the present invention, the conditioned air is supplied into the operation cabin between the rear projecting portion of the outer roof projecting rearward from the rear pillar and the lower cover covering the lower side of the rear projecting portion. In a waterproof seal structure of a work vehicle that houses an air conditioning unit to be supplied and has a waterproof seal mechanism at a position where the rear projecting portion and the lower cover meet.
The waterproof seal mechanism is disposed on a first seal member that is disposed on a first mating surface that connects the rearward projecting portion and the lower cover, and on a second mating surface that is formed on the inner side of the first mating surface. A second sealing member, and a water capturing space formed between the first sealing member and the second sealing member ,
The first seal member is disposed so as to correspond to the first mating surface formed in a U shape in a plan view extending from the rear peripheral portion of the lower cover to the left and right peripheral portions. The water space is formed in a U shape in plan view across the outer peripheral portion on the rear side of the lower cover and the outer peripheral portions on the left and right sides so as to follow the first mating surface inside the first mating surface. .

That is, since the storage space for storing the air conditioning unit is formed between the rear projecting portion of the outer roof that projects rearward from the rear pillar and the lower cover, it is susceptible to the intrusion of high-pressure water during car washing.
According to the above configuration, the mating surfaces of the rear projecting portion and the lower cover are provided at two locations, the first mating surface that connects them and the second mating surface that is formed inside the first mating surface. Form. The first seal member to the first mating surface, interposing the second sealing member to the second mating surface. Accordingly, moisture that could not be captured even by the first seal member located on the outside can be captured by the second seal member on the inside.
Moreover, blocking since provided moisture capturing space between the first sealing member and the second sealing member, penetrates beyond the presence of the first seal member located outside, the penetration in the second seal member of the inner has been a leak, it is possible to capture in the water catching space, to enhance the function of preventing the intrusion of water leakage into the air-conditioning unit housing space.

That is, the double seal structure in which the first seal member and the second seal member are arranged against the leak of water that enters the air conditioning unit storage space from outside the machine enhances the function of capturing the leak, and the first seal member and the second seal. By providing a water catching space between the members, it is possible to prevent water leakage from entering the air conditioning unit storage space.
Therefore, by combining two sealing members and a water capturing space, which have different sealing functions, a waterproof sealing structure having an improved function of preventing moisture from entering the air conditioning unit storage space can be provided.

In the invention according to claim 2 of the present invention, in the invention according to claim 1,
The lower cover is provided with a flat plate-like connecting portion extending outward from the upper end of the outer wall portion of the lower cover, and is erected at a position higher than the connecting portion from the inner side of the outer wall portion of the lower cover. Forming an inner wall portion,
A holding groove formed in an inner corner of the peripheral edge of the rearward projecting portion with the first seal member interposed between the lower surface of the peripheral edge of the rearward projecting portion and the connecting portion; The connecting portion is connected to the peripheral portion of the rearward protruding portion with the second seal member interposed between the upper end portion of the inner wall portion.

In the invention according to claim 3 of the present invention, in the invention according to claim 1 or 2,
The water catching space, together with the bottom surface of the water catching space of that can be on the lower as both side ends of the water catching space, in the water catching space, before and after facing portion of the left and right of the first mating surface the lowest portion corresponding to each of the front end, Oh Ru is provided a discharge port for discharging the trapped leakage in the moisture capturing space outside.

According to the above arrangement, leakage trapped in the water catching space, since it discharged outside from the discharge port formed in the water catching space, it is rare that water capturing amount is ten thousand full of water catching space, new It is possible to prevent the captured water leak from entering the air conditioning unit storage space again from the second mating surface while maintaining the water capturing capability of the water that has entered the first seal member.

  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.

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

  As shown in FIGS. 1 and 3, the outer roof 31 is supported by the upper surfaces of the front cross member 27 and the left and right side members 28, and has an outside air introduction path 38 at the front and rear intermediate portions thereof. The rear end portion extends rearward from the rear window 23 and is formed so as to function as an upper cover that covers the upper portion of the air conditioning unit 36.

  As shown in FIGS. 1 and 3, 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, and the rear end portion of the inner roof 30, the rear portion of the outer roof 31, and the lower cover 39. Thus, a storage space 40 for the air conditioning 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 FIG. 9, a pair of left and right outside air supply ports 42 that allow supply of outside air to the air conditioning unit 36 are formed in the rear center of the outer roof 31 so as to face the inside air supply ports 41 of the inner roof 30. ing.

As shown in FIGS. 1 and 9, a pair of left and right rods 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 is separated from the sirocco fan 57 so as to function as a guide wall that guides the unadjusted air from the sirocco fan 57 substantially uniformly throughout the evaporator 58. The left end side is formed in a multi-stage shape approaching 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 is provided with the left and right device side drainage hoses 65, 65 in a posture that is substantially horizontal and sideways. The left and right device side drain holes 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. It is.
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. . The outlet Cc for discharging from the lower cover 39 to the outside in the lowest portion corresponding to both side ends described above, by providing a Cc, is arranged to discharge the leakage trapped in the water-capturing space C.

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 portion of the lower cover 39 disposed behind the left and right rear pillars 26, 26 . The lower cover 39 is formed with a flat plate-shaped connecting portion having a constant width along a flat surface formed as a first mating surface, and a connecting fixture or the like passes through the connecting portion at predetermined intervals. A hole 69A is formed .

The second seal member 70 will be described. As shown in FIG. 1, the outer roof 31 is mainly supported by the front cross member 27 constituting the cabin 11 and the left and right side members 28, 28, the rearward projection portion projecting from the rear of the rear pillar 26, the lower cover 39 Are connected . 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 The main body seal part 70B provided in the state over the mating surface with the side members 28 and 28 is provided. 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] and the first seal member 69 and the second seal member 70 may be unified to that of a flat cross-sectional shape or rectangular cross-sectional shape, also may take the shape of a circular cross-section.
[3] A plurality of outlets Cc for discharging the water leaked in the water catching space C to the outside of the machine may be provided not only at the left and right ends but also at the left and right intermediate portions.
[4] The bottom surface of the water catching space C does not need to be formed at lower positions on both side ends, and may be configured at the same level.

Overall side view of tractor Plan view showing the rear of the cabin Longitudinal side view showing the air conditioning unit storage state at 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 Longitudinal side view showing a shutter motor which is provided between the inside air supply port and the outside air supply opening Diagram showing the crank arm for driving the shutter motor which is provided between the inside air supply port and the outside air supply opening Cross-sectional plan view showing the state of attachment of the hose to the rear pillar of the drainage mechanism

11 cabin 26 rear pillar 31 outer roof 36 air conditioning unit 39 lower cover
39A Outer wall
39B Inner side wall 69 First seal member 70 Second seal member B Waterproof seal mechanism C Water capture space Cc Discharge port

Claims (3)

An air conditioning unit that supplies conditioned air into the operation cabin is housed between a rear projecting portion of the outer roof that projects rearward from the rear pillar and a lower cover that covers a lower side of the rear projecting portion, and the rear projecting portion A waterproof seal structure for a work vehicle having a waterproof seal mechanism at a position to be combined with the lower cover ,
The waterproof seal mechanism is disposed on a first seal member that is disposed on a first mating surface that connects the rearward projecting portion and the lower cover, and on a second mating surface that is formed on the inner side of the first mating surface. A second sealing member, and a water capturing space formed between the first sealing member and the second sealing member ,
The first seal member is disposed so as to correspond to the first mating surface formed in a U shape in a plan view extending from the rear peripheral portion of the lower cover to the left and right peripheral portions. The water space is formed in a U shape in plan view across the outer peripheral portion on the rear side of the lower cover and the outer peripheral portions on the left and right sides so as to follow the first mating surface inside the first mating surface. Waterproof seal structure for work vehicles. The lower cover is provided with a flat plate-like connecting portion extending outward from the upper end of the outer wall portion of the lower cover, and is erected at a position higher than the connecting portion from the inner side of the outer wall portion of the lower cover. Forming an inner wall portion,
A holding groove formed in an inner corner of the peripheral edge of the rearward projecting portion with the first seal member interposed between the lower surface of the peripheral edge of the rearward projecting portion and the connecting portion; 2. The waterproof seal structure for a work vehicle according to claim 1 , wherein the connecting portion is connected to a peripheral portion of the rearward projecting portion in a state where the second seal member is interposed between the upper end portion of the inner wall portion . The water catching space, together with the bottom surface of the water catching space of that can be on the lower as both side ends of the water catching space, in the water catching space, before and after facing portion of the left and right of the first mating surface The waterproof seal structure for a work vehicle according to claim 1 or 2, wherein a discharge port for discharging water leaked in the water catching space to the outside of the machine is provided at a lowest part corresponding to each of the front ends .

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