JP6534955B2 - Work vehicle - Google Patents

Description

  In the present invention, an automatic fueling device for automatically supplying (replenishing) fuel oil from a fuel supply unit such as a working vehicle, in particular, a drum can, is interposed between the fuel oil tank and the hydraulic oil tank. Related to work vehicles.

  DESCRIPTION OF RELATED ART Conventionally, there exist some which were disclosed by patent document 1 as one form of a working vehicle. That is, in Patent Document 1, the base of the working unit is attached to the front center of the swivel base, and the operation unit is disposed on the swivel base on the left side of the working unit, while on the swivel base on the right side of the working unit. A working vehicle is disclosed in which an automatic fueling device, a battery case, and a fuel oil tank are disposed, and a motor unit is disposed at the rear on the swivel base. The automatic fueling device and the battery case disposed on the right side of the working unit are disposed on the right front on the swivel base adjacent to the left and right, and a fuel oil tank is disposed behind them. An automatic fueling device is connected in communication with the fuel oil tank, and the automatic feeding device can supply (refill) the fuel oil to the fuel oil tank from a fuel supply unit such as a drum. Further, a hydraulic fluid tank is disposed on the swivel base, and the hydraulic fluid is supplied from the hydraulic fluid tank to the hydraulic actuator provided in the working unit by the hydraulic fluid pump to operate the hydraulic actuator.

JP 2002-266377

  However, in the work vehicle described above, the layout on the swivel base is complicated. That is, the working unit is disposed at the front of the swivel base in consideration of workability, while the prime mover unit is disposed at the rear on the swivel platform in consideration of weight balance with the working unit, and the driving unit is With the automatic fueling device, the battery case, the fuel oil tank, and the hydraulic oil tank, the weight balance with the operation unit is made by positioning the automatic fueling device, the battery case, the fuel oil tank and the hydraulic oil tank There is a need to position it on the swivel base by positioning it on either the left or the other side of the working unit in consideration of the above. At this time, if the fuel oil tank and the engine or hydraulic oil tank of the prime mover are disposed adjacent to each other, the temperature of the fuel oil in the fuel oil tank excessively increases due to heat conduction from the engine or hydraulic oil tank to the fuel oil tank. There is a bug that. Therefore, the fuel oil tank needs to be disposed separately from the engine or hydraulic oil tank which is heated to a high temperature, and the layout on the swivel base is complicated.

  Therefore, an object of the present invention is to provide a working vehicle capable of preventing an excessive temperature rise of fuel oil in a fuel oil tank and compactly arranging an automatic fueling device on a swivel base.

The invention according to claim 1 is
On a swing table, a motor unit, a working unit operated by the motor unit, an operating unit for operating and operating the working unit and the vehicle body, a fuel oil tank for supplying fuel oil to the motor unit, and a fuel oil tank A working vehicle provided with an automatic oiling device for automatically supplying oil and a hydraulic oil tank for supplying hydraulic oil to a working unit,
A hydraulic oil tank is interposed between the prime mover and the fuel oil tank.
A fixed space is formed between the hydraulic oil tank and the fuel oil tank to form a storage space,
An automatic fueling device is accommodated in the accommodation space, and a fuel oil tank is disposed apart from the prime mover unit ,
The automatic fueling apparatus includes an apparatus case disposed in the housing space, a fuel supply pump supported by the apparatus case and having a suction port and a discharge port, and a proximal end connected to the suction port of the fuel supply pump. And a supply pipe connected at its proximal end to the discharge port of the fuel supply pump and housed in the device case,
The device case is formed in a bottomed cylindrical shape with a short front and rear width, a right and left width equal to the back width of the fuel oil tank, and an open upper surface,
In the lower part of one side of the device case, an arrangement space in which the side and the lower side are opened is formed in a notch shape, and a fuel supply pump is arranged in the arrangement space .

In the first aspect of the present invention, the hydraulic oil tank is disposed between the prime mover and the fuel oil tank, and the hydraulic oil tank and the fuel oil tank are spaced apart by a fixed distance. An accommodation space is formed, and an automatic fueling device is accommodated in the accommodation space, and the fuel oil tank is separated from the prime mover, so the fuel oil tank is separated from the engine and the hydraulic oil tank. The heat conduction to the fuel oil tank can prevent the temperature of the fuel oil in the fuel oil tank from rising excessively. Moreover, the automatic fueling device can be compactly laid out on the swivel base.
In addition, the automatic fueling device is supported by the device case disposed in the housing space, the device case, a fuel supply pump having a suction port and a discharge port, and a proximal end connected to the suction port of the fuel supply pump Since the suction pipe accommodated in the case and the supply pipe connected at the base end to the discharge port of the fuel supply pump and accommodated in the apparatus case are provided, the automatic fueling apparatus is provided in the accommodation space It can be housed easily and compactly.
In addition, the front and rear widths are short, the left and right widths are the same as the rear width of the fuel oil tank, and the side and the bottom are open at one lower portion of the bottomed cylindrical case having an open upper surface. Since the space is formed into a notch and the fuel supply pump is disposed in the arrangement space, maintenance of the fuel supply pump can be easily performed from the side.

The invention according to claim 2 is the invention according to claim 1, wherein
Fuel supply pump is connected to the output side of the control unit, to the input side of the control unit, the oil amount detection means is disposed in the fuel oil tank is connected, on the basis of the detection information of the oil amount detection means The control unit controls the operation of the fuel supply pump ,
The supply pipe is connected to the upper surface of the fuel oil tank through the open upper surface of the device case,
A mounting portion for mounting the control portion is provided on the upper surface portion of the fuel oil tank .

In the invention according to claim 2 , the supply pipe is connected to the upper surface of the fuel oil tank through the upper surface of the apparatus case, and the upper surface of the fuel oil tank is provided with a mounting portion for mounting the control unit. Therefore, it is possible to shorten the piping and wiring by shortening the information communication line connected to the supply pipe and the control unit, and the workability of the piping and wiring is improved, and the fuel to the fuel oil tank can be improved. The oil supply (refilling) can be performed consistently by the automatic fueling device.

  According to the present invention, it is possible to provide a working vehicle capable of preventing an excessive temperature rise of the fuel oil in the fuel oil tank and compactly arranging the automatic fueling device on the swivel base.

The left view of the work car concerning this embodiment. The right view of the work vehicle concerning this embodiment. The partially notched top view of the work vehicle which concerns on this embodiment. The perspective explanatory drawing of the motor part on a swivel stand, a tank accommodating part, and a heat exchange part. Perspective explanatory drawing from the front right side of a tank accommodating part and a heat exchange part. Perspective explanatory drawing from the left front of a tank accommodating part and a heat exchange part. A left side view of a fuel oil tank and an automatic fueling device. A right side view of a fuel oil tank and an automatic fueling device. A rear view of a fuel oil tank and an automatic fueling device. The top view of a fuel oil tank and an automatic fueling device. A perspective explanatory view from the back lower part of a fuel oil tank and an automatic fueling device. The perspective explanatory drawing of a cover body. The perspective explanatory view of the automatic fueling device as other embodiments. The perspective explanatory drawing of the lid open state of the automatic oil supply apparatus as other embodiment. Perspective explanatory drawing of external air introduction structure. The II sectional view taken on the line of FIG. Explanatory drawing which shows the virtual visual range which can be visually recognized through a front lower side window part. Perspective explanatory drawing of a lower cover. The expansion left side view of a swivel stand. The II-II line expanded sectional view of FIG. The perspective explanatory drawing of the left rear of a swivel base. The perspective view which shows the state which open | released the right side rear cover. The perspective view which shows the state which open | released the right side rear cover, and removed the right rear lower cover. The perspective explanatory drawing of the right front of a swivel base. Mounting state explanatory drawing of a drive * stop switch.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. A shown in FIGS. 1 to 3 is a work vehicle according to the present embodiment. First, the entire configuration of the work vehicle A will be described, and then the characteristic configuration of the present embodiment will be described.

[Description of overall configuration of work vehicle]
As shown in FIGS. 1 to 3, the work vehicle A includes a digging work unit 2 and a soil removal work unit 3 as working units in a self-propelled vehicle body 1. And the earth and sand etc. of the excavation earth surface can be excavated by the excavation work part 2, and the earth and sand excavated etc. can be discharged to a predetermined position. In addition, earth and sand etc. piled up on the ground can be discharged by the earth removal work unit 3. That is, the work vehicle A can perform the digging operation and the earth removing operation.

  The vehicle body 1 includes a pair of left and right crawler type traveling units 10, a swivel base supporting unit 11 bridged between both traveling units 10, 10, and a swivel base 12 rotatably mounted on the swivel base supporting unit 11. Adjacent to the right side of the driving unit 13 including the driving unit 13 mounted on the left side of the swing table 12 and the engine E mounted on the swing table 12 at the rear lower part of the driving unit 13 A tank accommodating portion 15 mounted on the right front on the swivel base 12 and a heat exchange unit 18 mounted on the right rear on the swivel base 12 adjacent to the right side of the operation unit 13; ing.

  The driving unit 13 operates and operates the vehicle body 1, the digging unit 2 and the soil removing unit 3, and is disposed in a cabin 16 formed in a box shape of a transparent material. The driving unit 13 stretches a flat floor 50 at the front, arranges a step-like driver's seat support 51 at the rear, and operates the floor 50 and the driver's seat support 51 on the right side A section 52 is provided.

  A pair of left and right steering operation levers 53 and 54 whose axes are directed in the vertical direction are provided upright at the front center of the floor 50, and the brake pedal 55 is disposed near the left side of the steering operation lever 53 on the left. On the other hand, the accelerator pedal 56 is disposed in the vicinity of the right side of the steering operation lever 54 on the right side.

  A driver's seat 57 is mounted on the top surface of the driver's seat support 51. The left operation lever 70 is disposed near the left side of the driver's seat 57, while the right operation lever 71 is disposed near the right side of the driver seat 57, and these left and right operation levers 70 and 71 are used. The digging unit 2 is operable. Reference numeral 72 denotes a cut-off lever for cutting the pilot oil of the operation lever for operating the working unit through a switch, and reference numeral 73 denotes an earth unloading operation lever for operating the earth unloading operation unit 3.

  The tank accommodation unit 15 includes a fuel oil tank 80 for supplying the fuel oil to the engine E, an automatic fueling device 90 for automatically supplying the fuel oil to the fuel oil tank 80, and hydraulic oil for the hydraulic actuator provided in the working unit The hydraulic oil tanks 100 for supplying the fluid are arranged and arranged on an imaginary straight line extending in the front-rear direction.

  The heat exchange unit 18 has a heat exchange function for cooling the engine E, and includes a radiator 60 (see FIG. 4), an exhaust fan 61 (see FIG. 6), and the like. Then, the exhaust air in the engine room is exhausted through the side grille 62 by the exhaust fan 61 which rotates in conjunction with the engine E. 60a is a radiator cap.

  As shown in FIG. 12, the above-mentioned tank accommodating part 15 and the heat exchange part 18 are covered with the cover body 63 at the front, the right side and the upper side. The cover body 63 includes a front right side cover 64, right side front and rear covers 65 and 66 covering the right side, and upper front, middle and rear covers 67, 68 and 69 covering the upper side. The front half portion is formed in a curved surface in the form of a downward slope to the front. The tank accommodating portion 15 is covered with the right front cover 64, the right front cover 65, and the upper front and middle covers 67, 68. The right front cover 64 has its upper end edge formed in a downward sloping curved surface in the forward direction, and the upper front and middle covers 67, 68 are formed in the downward sloping curved surface along the curved surface. doing. The heat exchange portion 18 is covered by the right side rear cover 66 and the top rear cover 69. The right side rear cover 66 is formed with the side grille 62 described above. The right side rear cover 66 is openable and closable in the left and right direction with the front end edge as a pivot. The upper surface midway cover 68 can be opened and closed in the vertical direction with the front end edge side up and down with the rear end edge as a pivot.

  The digging unit 2 has a bracket support 20 at the front end of the swivel base 12. A boom support bracket 21 is attached to the bracket support 20 so as to be able to swing left and right around an axis in the vertical direction, and a left and right swing cylinder 17 is interposed between the boom support bracket 21 and the swivel base 12 The boom support bracket 21 can be rocked horizontally by the rocking cylinder 17. The base end portion (lower end portion) of the boom 22 which is extended in the vertical direction and formed in a "V" shape in the side view is pivoted to the boom support bracket 21 via the boom support shaft 23 whose axis is directed in the left and right direction. It is connected and connected. A boom cylinder 24 is interposed between the front end of the boom support bracket 21 and the middle of the boom 22 so that the boom 22 can be moved up and down by the boom cylinder 24. The proximal end (upper end) of the arm 25 formed by extending straight in the vertical direction is pivoted at the tip end (upper end) of the boom 22 through an arm support shaft 26 whose axis is directed in the left and right direction. It is connected and connected. An arm cylinder 27 is interposed between the base end of the arm 25 and the middle portion of the boom 22 so that the arm 25 can be rocked back and forth by the arm cylinder 27. The upper portion of a pair of left and right bucket brackets 29 provided on the back base (front end) of the bucket 28 is pivoted at the tip end (lower end) of the arm 25 via a bucket support shaft 30 whose axis is directed in the left and right direction. It is connected. A bucket cylinder 32 is interposed between a lower portion of the bucket bracket 29 and a base end of the arm 25 via a bucket link mechanism 31, and the bucket cylinder 32 can vertically swing the bucket 28 by the bucket cylinder 32.

  As shown in FIGS. 1 to 3, the earth removal work unit 3 pivotally connects the base ends of the pair of earth removal plate support arms 40, 40 on the swivel base support 11 so as to support both earth removal plates The tip end side of the arms 40, 40 is swingable, and a drain plate 41 elongated in the left-right direction is constructed between the tip portions of both the earth removing board supporting arms 40, 40, and this earth removing board By 41, it is possible to carry out the discharge operation. 42 is a discharge plate cylinder.

[Description of Characteristic Configuration of this Embodiment]
Next, characteristic configurations of the present embodiment will be described with reference to FIGS. 4 to 12. That is, in the tank housing portion 15, the hydraulic oil tank 100 is disposed between the engine E of the prime mover portion 14 and the fuel oil tank 80, and between the hydraulic oil tank 100 and the fuel oil tank 80, A flat containing space S is formed at a constant interval. In the accommodation space S, the automatic fueling device 90 is accommodated, and the fuel oil tank 80 is disposed apart from the engine E of the prime mover unit 14. As described above, since the flat accommodation space S is formed with a certain interval between the hydraulic oil tank 100 and the fuel oil tank 80, heat conduction from the hydraulic oil tank 100 to the fuel oil tank 80 can be achieved. This can be effectively prevented, and the temperature rise of the fuel oil tank 80 can be prevented.

  More specifically, in the present embodiment, as shown in FIG. 5, the engine E of the motor unit 14 is mounted with its axis in the left-right direction on the center rear of the swivel base 12. A heat exchange unit 18 is disposed at the right rear of a swing base 12 and a tank storage unit 15 is disposed in front of the heat exchange unit 18. The hydraulic fluid tank 100 is disposed in the tank housing portion 15, the automatic oiling device 90 is disposed in front of the hydraulic oil tank 100, and the fuel oil tank 80 is disposed in front of the automatic oiling device 90. Reference numeral 102 denotes an air cleaner mounted on the hydraulic oil tank 100. The air cleaner 102 is connected to the intake port of the engine E via the downstream side intake pipe 104. Reference numeral 106 denotes an upstream intake pipe. Thus, the fuel oil tank 80 is disposed on the right front of the swivel base 12. Therefore, the fuel oil tank 80 can be disposed apart from the engine E and the hydraulic oil tank 100, and the heat conduction to the fuel oil tank 80 causes the temperature of the fuel oil in the fuel oil tank 80 to rise excessively. It can be prevented. Moreover, the automatic fueling device 90 can be laid out compactly on the swivel base 12.

  The automatic fueling device 90 includes a device case 91, a fuel supply pump 92, a suction pipe 93, and a supply pipe 94, as shown in FIGS. The device case 91 is disposed in the housing space S, and the device case 91 supports a fuel supply pump 92 having a suction port 92 a and a discharge port 92 b. The proximal end portion of the suction pipe 93 is connected to the suction port 92 a of the fuel supply pump 92, and the suction pipe 93 is contracted and accommodated in the device case 91 in a winding manner. The proximal end of the supply pipe 94 is connected to the discharge port 92 b of the fuel supply pump 92, and the supply pipe 94 is connected to the top of the fuel oil tank 80 through the inside of the device case 91. The fuel supply pump 92 is connected to the output side of the control unit 95 having a personal computer function via a first wire harness Wh1. An oil amount detection sensor 96 as an oil amount detection unit disposed in the fuel oil tank 80 is connected to the input side of the control unit 95 via an information communication line 99. Wh2 is a second wire harness, and the control unit 95 is connected to a battery Ba described later, which is a power supply, via the second wire harness Wh2. Then, the control unit 95 controls the drive / stop operation of the fuel supply pump 92 based on the detection information of the oil amount detection sensor 96. Therefore, the automatic fueling device 90 can be accommodated easily and compactly in the accommodation space S.

  When the fuel oil is supplied (supplemented) to the fuel oil tank 80, the suction pipe 93 accommodated in the device case 91 is taken out and extended, and the tip of the suction pipe 93 is connected to the fuel supply portion such as a drum can. Do. Then, the fuel supply pump 92 can be driven and controlled via the control unit 95, and the fuel supply pump 92 can be automatically controlled to stop on the basis of the detection information of the oil amount detection sensor 96.

  The device case 91 is formed in a bottomed cylindrical shape having a short front-rear width and a width substantially equal to the rear width of the fuel oil tank and having an open upper surface. That is, the device case 91 has a square plate-shaped front wall portion 91a, a rear wall portion 91b formed by cutting a lower left portion into a square shape from a rectangular plate shape substantially the same shape as the front wall portion 91a, and front and rear A left upper portion 91c extended between the upper left end of the wall 91a, 91b, a lower left portion 91d built between the lower left of the front wall 91a and a left end of the rear wall 91b, -Between the lower end edges of the front and rear wall portions 91a and 91b between the right side wall portion 91e bridged between the right end edges of the rear wall portions 91a and 91b and the lower left wall portion 91d and the right side wall portion 91e And the bottom wall portion 91f. Then, an arrangement space Sa having an opening on the left side and a lower side is formed in a notch on the left lower side (one side lower side) of the device case 91, that is, on the left side of the left side wall lower part 91d. The supply pump 92 is disposed, and the fuel supply pump 92 is attached to the left side wall lower portion 91 d. Therefore, maintenance of the fuel supply pump 92 can be easily performed from the left side. Reference numeral 326 denotes a rear mounting bracket attached to the top of the rear wall 91b, and the rear wall 91b is mounted to the upper surface wall of the hydraulic fluid tank 100 via the rear mounting bracket 326.

  The supply pipe 94 is connected to the upper surface of the fuel oil tank 80 through the open upper surface of the device case 91. A mounting portion 98 for mounting the control unit 95 is provided at the left rear of the upper surface portion of the fuel oil tank 80. Therefore, the information communication line 99 connected to the supply pipe 94 and the control unit 95 can be shortened to make the piping and wiring compact, and the operability of the piping and wiring can be improved. The fuel oil supply (supply) can be performed consistently by the automatic fueling apparatus 90.

  Next, the above-described characteristic configuration and the peripheral configuration of the configuration will be described more specifically. That is, as shown in FIGS. 4 to 6, the hydraulic oil tank 100 formed in a rectangular box shape which is horizontally long is fixed on the middle part on the right side of the swivel base 12. At the right front of the swivel base 12, a laterally long mounting body 19 is provided. An automatic fueling device 90 is attached to the mounting body 19 through a fuel oil tank 80 via a mounting member group 300.

  The mounting member group 300 includes left, right, and upper mounting pieces 302, 304, 306 extending in the front-rear direction. The left mounting piece 302 connects the front end to the left end of the mounting body 19 and connects the rear end to the left mounting bracket 308 provided on the front left side of the hydraulic oil tank 100. The right attachment piece 304 is formed by connecting the front end to the right end of the attachment body 19 and extending forward from the middle of the right end edge of the rear wall 91 b forming a part of the device case 91 The rear end portion is connected to the right side mounting bracket 310. The upper mounting piece 306 connects the front end to the middle part of the mounting body 19, and extends upward from the middle part of the upper edge of the front wall 91a that forms a part of the apparatus case 91. The rear end portion is connected to the mounting bracket 312. Reference numeral 314 denotes a support that forms a part of the swivel base 12. The support 314 supports the fuel oil tank 80 from the lower side and a lower end edge of a front wall 91 a that forms a part of the device case 91. The rear end edge portion 316 is connected to the lower portion of the device case 91 so as to support the lower portion of the device case 91. Reference numeral 318 denotes a rear connection bracket attached to the right side wall of the hydraulic oil tank 100, and the rear connection bracket 318 connects the rear end edge of the right side front cover 65. 320 is a pivot bracket attached to the rear connection bracket 318, and the pivot bracket 320 pivots the front end edge of the right side rear cover 66. Reference numeral 322 denotes a front connection bracket attached to the front of the swivel base 12, and the front connection edge of the right side front cover 65 is connected to the front connection bracket 322. Reference numeral 324 denotes a discharge pipe connected to the bottom wall 91 f of the device case 91.

  The fuel oil tank 80 is provided with a filler port 81 at the rear center of the upper surface thereof. An oil amount detection sensor 96 is provided on the upper surface portion located on the right side of the fuel supply port 81, and the oil amount detection sensor 96 can detect the full amount of oil and the minimum amount of oil. . Therefore, when the fuel supply pump 92 is operated to perform the refueling operation, when the oil amount detection sensor 96 detects the full amount of oil, the control unit 95 automatically supplies the fuel based on the detection information. The operation of the pump 92 is controlled to be stopped. In addition, when the oil amount detection sensor 96 detects the minimum amount of oil, the control unit 95 controls operation of notification means (not shown) that stimulates the operator's hearing and / or vision based on the detected information. It is like that. Reference numeral 97 denotes an inspection pipe which is inserted into the fuel oil tank 80 so as to be freely inserted and removed, and to check the condition of the fuel oil in the fuel oil tank 80.

  As shown in FIG. 12, the swivel base 12 includes the left front cover 200, the left front lower cover 202, the left rear lower cover 204, the counterweight 206, and the right front lower cover, in addition to the cover body 63 described above. The swivel base 12 includes a right rear lower cover 210, a left front upper cover 214, a left middle cover 215, a left rear upper cover 216, a left side cover 217, and a rear cover (bonnet) 218. It is arranged along the peripheral edge.

[Description of the arrangement structure of the automatic fueling device as another embodiment]
Next, the arrangement structure of the automatic fueling apparatus 90A as another embodiment will be described with reference to FIGS. 13 and 14. That is, as shown in FIGS. 13 and 14, the automatic fueling apparatus 90A has an apparatus case 91A, a fuel supply pump 92, an intake pipe 93, and a supply pipe 94, as in the basic structure of the automatic fueling apparatus 90. However, the configuration of the device case 91A is largely different from that of the device case 91A in that the device case 91A is placed in communication with the upper surface rear cover 69 in a mounted state.

  The apparatus case 91A has a flat lunch box with a case main body 400 in which the suction pipe 93 is contracted in a wound shape inside and can be accommodated at the upper surface opening and a lid 402 attached to the case main body 400 freely opening and closing. It is formed in the shape of a circle. A maintenance opening / closing unit 404 is provided at the center of the bottom of the case main body 400, and maintenance of the radiator 60 and operation of the radiator cap 60a are enabled via the maintenance opening / closing unit 404. A control unit 95 is attached to the outer surface of the side surface of the case main body 400, and the control unit 95 is openable / closable by a lid 402. A fuel supply pump 92 is attached to a lower surface of the bottom of the case main body 400 in a suspended state. The base end of the suction pipe 93 is connected to the suction port 92a of the fuel supply pump 92, and the suction pipe 93 is formed in the first insertion hole 406 formed by opening the upper surface rear cover 69, and further, the case The case body 400 is accommodated in the second insertion hole 408 which is formed by being opened at the side surface portion of the main body 400. The proximal end of the supply pipe 94 is connected to the discharge port 92 b of the fuel supply pump 92, and the supply pipe 94 is connected to the top of the fuel oil tank 80 through the inside of the cover body 63. Reference numeral 410 denotes a third insertion hole formed by opening the upper surface rear cover 69 for inserting the second wire harness Wh2. Reference numeral 412 denotes a fixed-side locking piece. Reference numeral 414 denotes a movable-side locking piece. The guide body 418 is an open / close handle, and 420 is a key hole for locking and releasing the movable side locking piece 414 in the fixed side locking piece 412.

  In the automatic fueling apparatus 90A configured as described above, even after the work vehicle A is sold, attachment (retrofitting) to the upper surface rear cover 69 is possible. In addition, regular maintenance of the radiator 60 is possible without reducing visibility within the turning radius of the present machine existing shape.

[Structure of the right side of the cabin]
Next, the structure of the right side portion of the cabin 16 formed in a box shape will be described with reference to FIG. 2, FIG. 15, FIG. 16, and FIG. That is, most of the right side surface portion 500 of the cabin 16 is formed by stretching the rectangular right side window portion 502. The right side window portion 502 has its lower end edge formed horizontally straight. In the cover body 63, the upper surface front half is formed in a downward sloping curved surface, and the functional portion support wall 504 is stretched between the upper surface left edge and the lower edge of the right window 502. The functional portion support wall 504 is formed by gradually widening the vertical width from the rear to the front.

  At the front end of the functional portion support wall 504, an inverted triangular front lower window portion 506 as a functional portion is provided. The front lower window portion 506 has its upper end edge formed straight along the upper end edge portion of the functional portion support wall 504 and its front end edge portion along the front end edge portion of the functional portion support wall 504. It has a straight shape, and an oblique side connecting the lower end of the front end edge and the rear end of the upper end edge is formed in a straight shape. The front lower side window part 506 is arrange | positioned ahead rather than the front surface part of the side operation part 52, as shown in FIG. Then, the operator Op sitting on the driver's seat 57 and operating the steering operation levers 53 and 54 can visually recognize the lower front of the cover body 63 through the lower front window portion 506. Ls denotes the line of sight of the operator Op in a sitting posture for visualizing the outside of the machine through the front lower side window portion 506, and Es denotes a virtual field of vision where the operator Op in the sitting posture can visually check the machine outside the front lower side window portion 506 It is a range.

  In the middle of the functional portion support wall 504, an external air introduction port 508 as a functional portion for introducing the external air Fa is formed to extend in the front-rear direction. A flat box-shaped inner introduction case 510 that opens in a facing state to the outside air introduction port 508 is attached to the inner side surface of the function part support wall 504, while the outside air introduction port 508 side is attached to the outside surface of the function part support wall 504. A flat net-like box-shaped outer introduction case 512 is attached to the housing. A communication port 514 is formed at the front of the inner introduction case 510. A filter case 516 disposed in communication with the inside of the front portion of the side operation portion 52 is communicatively connected to the communication port 514. In the filter case 516, a filter 518 for cleaning the outside air Fa is attached. And outside air Fa is inside the front of the side operation unit 52 which communicates with outside introduction case 512 → outside air introduction port 508 → inside introduction case 510 → communication port 514 → communication case 514 → filter case 516 and filter 518 inside filter case 516. The outside air Fa that has been purified is allowed to flow in.

  A front portion of the side operation unit 52 is a cooling / heating air discharge unit 520 which constitutes a part of an air conditioning apparatus (not shown) having a cooling cycle mechanism and a heating cycle mechanism. A heater core and an evaporator are disposed in the cold and warm air discharge unit 520, and a blower fan (not shown) is disposed below the heater core and the evaporator. A front upper discharge port 522 is provided on the front surface of the cold and warm air discharge part 520. In addition, an inner discharge port 524 is provided on the inner side surface of the cold and warm air discharge part 520. The discharge ports 522 and 524 are respectively provided with first and second discharge direction adjusters 526 and 528 capable of adjusting the discharge direction of the discharge wind of a louver or the like. Reference numeral 530 denotes a display panel provided on the upper surface portion of the cold and warm air discharge unit 520. Then, at the time of cooling, the cleaned outside air Fa in the filter case 516 is sucked by the blower fan, and the outside air Fa is pressure-fed to the evaporator and cooled (heat exchange) by the evaporator to become cold air. It is made to be released from 522,524. At the time of heating, the outside air Fa sucked in the same manner is pressure-fed to the heater core, warmed by the heater core, warmed (heat-exchanged), and released from the discharge ports 522 and 524 as warm air. .

In the right side portion of the cabin 16 configured in this way, the front lower side window portion 506 is provided at the front end portion of the functional portion support wall 504, so the driver sits on the driver's seat 57 and operates the steering operation levers 53 and 54 The operator Op can consistently view the front lower side of the cover body 63 through the front lower side window portion 506, and can reduce the blind spot of the operator Op . During this, the lower front window part 506 for thereby disposed above the cover member 63 formed on the downward inclined curved surface forward, are disposed further forward than the cold warm-emitting portion 520, the cover body The visibility of the operator Op is not hindered by the reference numeral 63 or the warm and cold air release unit 520.

  The cold air discharge part 520 is located at the right hand side (aside) of the right side of the operator Op, so the inner discharge port part 524 can be installed with a short duct near the operator Op to minimize pressure loss be able to. Then, cold air or warm air can be directly applied to the operator Op to directly cool or heat the body.

  By arranging a plurality of the front upper outlet 522 and the inner outlet 524 in a concentrated manner, it is possible to secure a space in which the front lower window 506 can be installed while maintaining the air conditioning performance. Performance and visibility can be secured. Since the display panel 530 is installed on the upper surface portion of the cold and warm air discharge portion 520, the operation performance can be secured.

  Conventionally, the following techniques each have the following problems, but all of these problems can be solved in the above-described embodiment. That is, according to JP2009-215699A, a bonnet is disposed adjacent to a cabin covering a driver's seat on a revolving platform, an air conditioning apparatus is disposed in the cabin, and the air conditioning is performed at a lower side wall of the cabin. A pivoting work vehicle provided with an open air introduction hole at the position of the part facing the device is disclosed. However, if a window is installed in the side wall of the side lower part of the cabin by the side of bonnet in order to secure a good view, a window can not be installed because an air conditioning apparatus obstructs a view. Therefore, a blind spot occurs below the hood of the backhoe.

  Japanese Patent Application Laid-Open No. 2005-297614 has a construction in which a cooling / heating box is provided on the lower side of a seating seat portion at the driver's seat, and the inside of the cooling / heating box and the inside of the air duct of the air conditioning unit are connected via a ventilation pipe A machine is disclosed. However, since the air conditioning unit and the air outlet are at the rear of the seat, the operator's face and body have a problem that the cooled air is not directly applied.

  Japanese Patent Application Laid-Open No. 2011-69045 discloses a swiveling work vehicle capable of directly cooling the body by providing an air outlet close to the operator and applying air directly to the operator. However, since the air conditioning unit is under the seat, the distance of the duct is extended, the pressure loss is increased, and the energy loss is increased.

  JP 2009-215699 A1 discloses a turning vehicle provided with at least one louver that covers the upper side and the side of the outside air introduction hole. However, in order to maintain the air conditioning performance of the air conditioning apparatus, it is necessary to secure a certain amount of ventilation, and when a plurality of ventilation holes are provided, it is necessary to attach a plurality of louvers to them, so manufacture There is a problem that the cost rises.

[Description of the structure of the lower cover covering the peripheral portion of the swivel base]
The structure of the lower cover that covers the peripheral portion of the swivel base 12 will be described with reference to FIGS. 12 and 18 to 23. That is, as shown in FIG. 12, the work vehicle A according to the present embodiment is the lower front cover 202, the lower left rear cover 204, the lower right front cover 208, and the lower right rear cover 210, as shown in FIG. , And are provided in the swivel base 12 in a divided configuration. Each of the covers 202, 204, 208, and 210 is formed in a strip shape extending in the front-rear direction, and is formed to be curved in an arc along the peripheral edge of the turntable 12. The left front lower cover 202 and the right front lower cover 208, and the left rear lower cover 204 and the right rear lower cover 210 can be formed so as to be symmetrical with respect to the left and right lines by changing the common mold line, respectively. Is reduced.

  As shown in FIG. 4, the swivel base 12 is provided with cover connecting pieces 12a, 12b and 12c at the left and right side front part and the left and right side middle part and left side rear part of the peripheral edge. The middle portions of the left and right front lower covers 202 and 208 are connected to the left and right front cover connection pieces 12a and 12a. As shown in FIGS. 19 and 20, the left and right front lower cover 202, 208 and the rear end 203, 209 of the left and right front lower cover 204, and the left and right rear lower cover 204, as shown in FIGS. The front end portions 205 and 211 of 210 are arranged in a polymerization state on the inner and outer sides, and they are connected together in a cross-through manner by means of a connecting bolt 222. The middle part of the left rear lower cover 204 is connected to the left rear cover connecting piece 12c. A nut 220 is provided in a row on each cover connection piece 12a, 12b, 12c, and a connection bolt 222 is screwed to each nut 220, so that the covers 202, 204, 208, 210 can be detachably attached to the swivel base 12. Attached (see FIGS. 19 and 20).

  As described above, the left (right) side front and rear lower covers 202 (208) and 204 (210) formed by dividing them back and forth can be removed at one side only by fastening them by sharing their ends. And Therefore, only the necessary part can be removed at the time of maintenance of the internal parts. In addition, since each lower cover 202, 204, 208, and 210 has a structure in which a mold is shared and a part to be divided into front and rear is created, it is possible to realize reduction of the operation man-hour and parts cost by sharing parts. it can.

  As shown in FIG. 21, the left rear upper cover 216 pivotally supports the front end 219 on the cover pivot 230 provided on the swivel base 12 so that the rear end can be opened and closed in the left-right direction. The left rear upper cover 216 and the left rear lower cover 204 close the left outer side of the tool box 240 disposed at the left rear of the swivel base 12. The tool box 240 is formed of a tool box main body 242 having a top opening box shape and a tool lid 244 for opening and closing the top of the tool box main body 242. The tool lid 244 can be opened and closed by opening the left rear upper cover 216. Therefore, the tool accommodated in the tool box main body 242 can be easily put in and out. Also, by opening the left rear upper cover 216 and removing the left rear lower cover 204, the tool box 240 can be easily removed from the swivel base 12.

  The right rear lower cover 210 covers the lower portion of the heat exchange section 18 from the outer side, as shown in FIGS. 22 and 23. A battery Ba is disposed below the heat exchange unit 18. The battery Ba is detachably mounted on the swivel base 12, and maintenance can be performed easily by removing the right rear lower cover 210 covering from the outside on the right side, and the battery Ba is replaced. You can also. That is, the maintainability and replaceability of the battery Ba are excellent.

  Conventionally, in the case of press molding a cover according to Japanese Patent No. 4048260, since the mold of the long one is too large and the molding machine is limited, the cover is divided so that the mold can be shared. Although the technique of improving maintainability is described, there is no concrete description about maintainability.

  Japanese Utility Model Application Laid-Open No. 63-172781 discloses a structure in which a guard is made of one part. However, when maintaining a battery or other internal parts, it is necessary to remove the entire guard set located on one side of the machine. As guarding the side of one side of this machine, it is necessary to remove the guard for parts with high maintenance frequency each time.

  As described above, when the cover or the guard is press-molded, the mold for the long one is too large, and the molding machine is limited. Therefore, in the present embodiment, the shape can be shared even if it is divided. I have to.

[Description of arrangement structure of start / stop switch of battery power]
Next, the arrangement of the power supply start / stop switch 250 of the battery Ba will be described with reference to FIGS. 24 and 25. FIG. That is, as shown in FIG. 24 and FIG. 25, the accommodation recess 260 of the front opening is formed at the right front end of the swivel base 12. The accommodation recess 260 is disposed on the right side of the bracket support 20 attached to the central front end of the swivel base and in front of the tank accommodation portion 15. The drive / stop switch 250 includes a switch main body 252, and an operation piece 254 for rotating the switch main body 252 in the vertical direction around the longitudinal axis. The switch body 252 is attached to the back of the housing recess 260. The operation piece 254 is disposed in a state of being completely (wholely) housed in the housing recess 260. The switch main body 252 can be connected and disconnected by rotating the operation piece 254 in the vertical direction in the housing recess 260. The operation piece 254 is detachably interlocked with the switch body 252. The housing recess 260 is covered at its front upper side by a collar portion 256 horizontally extending forward from the turntable 12.

  Since the drive / stop switch 250 configured in this way is installed at a position of the swivel base 12 adjacent to the bracket support 20 to which the excavation work unit 2 is attached, it is interrupted by the excavation work unit 2 and directly collided It becomes difficult structure. Moreover, since the drive / stop switch 250 is disposed in the housing recess 260, in addition to the above-described structure, the drive / stop switch 250 has a structure that is less likely to be directly impacted, and damage and malfunction are further reduced. Since the drive / stop switch 250 starts and stops the power supply of the battery Ba by turning the operation piece 254 in the vertical direction, the possibility of malfunction is reduced compared to the push button type. When the power of the battery Ba is stopped by the drive / stop switch 250, the operation piece 254 can be removed from the switch main body 252, so that the drive / stop switch 250 is prevented from being operated by mischief. Can. The accommodation recess 260 covers the front upper side thereof with the brim portion 256, and therefore rainwater and the like hardly enter the accommodation recess 260. Therefore, the drive / stop switch 250 can be prevented from malfunctioning or breaking due to rain water or the like.

  Conventionally, Japanese Patent Laid-Open No. 9-315349 discloses a structure in which a power on / off switch is installed on the top of a battery mounted on the front end of a tractor vehicle body. However, since the power on / off switch is installed on the top of the battery mounted on the front end of the tractor body, the power on / off switch covers the battery when the power of the battery is shut off. Since it is necessary to open the bonnet which is present, if it is necessary to immediately stop the battery power due to a fire or the like, the time-consuming ball for opening the bonnet is a problem.

  In addition, when the work vehicle enters insurance in Europe, the Guidelines for Fire Suppression of Vehicles and Forest Machinery issued by the Swedish Fire Protection Association are often required to be followed when defining the structure of the vehicle. Stop devices require easy access.

  In order to meet this demand, in the European market, a power on / off switch may be optionally provided at the side of the backhoe or at the front of the backhoe. However, when the power on / off switch is provided in a projecting manner as described above, it may cause damage or malfunction of the power on / off switch when it is caught in a rear impact or caught on a branch of a tree.

A work vehicle S accommodation space 12 swing platform 13 operation unit 14 prime mover unit 15 tank accommodation unit 80 fuel oil tank 90 automatic fueling device 100 hydraulic oil tank

Claims (2)

On a swing table, a motor unit, a working unit operated by the motor unit, an operating unit for operating and operating the working unit and the vehicle body, a fuel oil tank for supplying fuel oil to the motor unit, and a fuel oil tank A working vehicle provided with an automatic oiling device for automatically supplying oil and a hydraulic oil tank for supplying hydraulic oil to a working unit,
A hydraulic oil tank is interposed between the prime mover and the fuel oil tank.
A fixed space is formed between the hydraulic oil tank and the fuel oil tank to form a storage space,
An automatic fueling device is accommodated in the accommodation space, and a fuel oil tank is disposed apart from the prime mover unit ,
The automatic fueling apparatus includes an apparatus case disposed in the housing space, a fuel supply pump supported by the apparatus case and having a suction port and a discharge port, and a proximal end connected to the suction port of the fuel supply pump. And a supply pipe connected at its proximal end to the discharge port of the fuel supply pump and housed in the device case,
The device case is formed in a bottomed cylindrical shape with a short front and rear width, a right and left width equal to the back width of the fuel oil tank, and an open upper surface,
A working vehicle characterized in that an arrangement space in which a side and a lower side are opened is formed in a notch shape at one lower portion of an apparatus case, and a fuel supply pump is arranged in the arrangement space . The fuel supply pump is connected to the output side of the control unit,
The input side of the control unit, the oil amount detection means is disposed in the fuel oil tank is connected, and as the control unit based on the detection information of the oil amount detection means controls the operation of the fuel supply pump ,
The supply pipe is connected to the upper surface of the fuel oil tank through the open upper surface of the device case,
The work vehicle according to claim 1, wherein a mounting portion for mounting the control portion is provided on the upper surface portion of the fuel oil tank .

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