JP6547669B2 - Work machine - Google Patents

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JP6547669B2
JP6547669B2 JP2016066540A JP2016066540A JP6547669B2 JP 6547669 B2 JP6547669 B2 JP 6547669B2 JP 2016066540 A JP2016066540 A JP 2016066540A JP 2016066540 A JP2016066540 A JP 2016066540A JP 6547669 B2 JP6547669 B2 JP 6547669B2
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supply port
water supply
vehicle
engine
reducing agent
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JP2017179797A (en
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裕之 木崎
裕之 木崎
善大 伊藤
善大 伊藤
剛史 竹山
剛史 竹山
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日立建機株式会社
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Description

  The present invention relates to a work machine.

  There is known a working machine (working vehicle) provided with an exhaust gas purification device for removing nitrogen oxides (NOx) in exhaust gas (see Patent Document 1). As an exhaust gas purification device of this type, there is one in which a reduction catalyst is disposed in an exhaust system of an engine, and a reducing agent injection device provided in an exhaust passage upstream of the reduction catalyst supplies a reducing agent. The NOx in the exhaust gas comes in contact with the reducing agent and is purified to a harmless component by promoting the reduction reaction in the reduction catalyst.

  In the work machine described in Patent Document 1, the fuel supply port of the fuel tank protrudes from the fuel tank main body in a first direction which is one of left and right with respect to the central axis of the vehicle body in the front-rear direction. . Further, the water supply port of the reducing agent tank protrudes from the reducing agent tank main body in a second direction which is a direction opposite to the first direction with respect to the central axis in the front-rear direction of the vehicle body.

Patent No. 5336646

  In the working machine described in Patent Document 1, the fuel supply port of the fuel tank and the water supply port of the reducing agent tank are disposed on different left and right side faces of the work machine. In such a working machine, it is necessary to open and close the opening and closing member for water supply operation at the time of water supply operation, and to open and close the opening and closing member for oil supply operation at the time of oil supply operation. In each of the water supply operation and the fuel supply operation, since it is necessary to open and close the opening and closing member constituting the vehicle body cover, the operation efficiency is poor when the water supply operation and the oil supply operation are performed simultaneously or continuously.

A work machine according to one aspect of the present invention includes a vehicle body, an engine mounted on the vehicle body, an exhaust gas purification device mounted on the vehicle body and purifying exhaust gas discharged from the engine, and the vehicle body A reducing agent tank which is placed on top and stores the reducing agent to be supplied to the exhaust gas purifier and which has a water supply port for the reducing agent, and a fuel that is placed on the vehicle body and stores the fuel and has a fuel supply port for the fuel A heat exchanger for cooling a refrigerant of the engine , comprising: a working fuel tank; and a single cover which forms an outer shell of a storage chamber in which the reducing agent tank is housed and is provided so as to be openable and closable ; A cooling fan generating cooling air for the heat exchanger, wherein the water supply port and the fuel supply port are respectively provided on one side of the vehicle body, and the single cover is closed; The water supply port and the fuel supply port Serial disposed at a position covered by a single cover, said storage chamber, and an engine compartment in which the engine is accommodated, and the reducing agent tank, a cooler chamber in which the heat exchanger and the cooling fan is housed, A partition separating the engine chamber and the cooler chamber, the water supply port and the fuel inlet are disposed in the cooler chamber, and the single cover is a side portion of the engine chamber and It is a building cover that covers the side of the cooler room, the building cover is provided with one of an inlet and an outlet for the cooling air, and the grille covers the rear of the cooler room with the cooling air. And the other of the air inlet and the air outlet .

  According to the present invention, it is possible to improve the working efficiency in the case where the water supply operation and the refueling operation are performed simultaneously or continuously.

Side view of a wheel loader. The figure which looked at the rear body of a building cover in a fully opened state from the left side of a vehicle. The perspective view which shows the inside of a cooler chamber. The disassembled perspective view which shows a mounting bracket and a urea water tank. The perspective view which shows the state in which the urea water tank was attached to the mounting bracket. The figure which looked at the attachment structure of the urea water tank shown in FIG. 5 from the left side of the vehicle. The perspective view which expands and shows a collar part and the attachment hole where a collar part is attached. The perspective view which shows the rear vehicle body in the state where the building cover was closed. The perspective view which shows the rear vehicle body in the state where the building cover was opened.

  Hereinafter, an embodiment of a working machine according to the present invention will be described with reference to the drawings. For convenience of explanation, in the present embodiment, as described in the respective drawings, the longitudinal and lateral directions and the vertical direction are defined. Further, in the present embodiment, among the members constituting the working machine, in each of the drawings, descriptions of a part or all of the members which need to be omitted for the sake of explanation are omitted.

  FIG. 1 is a side view of a wheel loader which is an example of a work machine (work vehicle) according to an embodiment of the present invention. As shown in FIG. 1, the wheel loader includes a front vehicle body 110 having an arm 111, a bucket 112, and a front wheel 113, and a rear vehicle body 120 having a cab 121, a building 122, a rear wheel 123 and the like. Configured

  The arm 111 is rotated (up and down) in the vertical direction by driving of an arm cylinder (not shown), and the bucket 112 is rotated (cloud or dump) in the vertical direction by driving of the bucket cylinder 115. The front vehicle body 110 and the rear vehicle body 120 are rotatably connected to each other by the center pin 101, and the expansion and contraction of the steering cylinder 116 bends the front vehicle body 110 to the left and right with respect to the rear vehicle body 120.

  On a rear frame 220 (see FIG. 2) constituting the rear vehicle body 120, an engine 301, an exhaust gas purification device 400, a heat exchanger, various hydraulic devices, and the like are mounted. The building 122 constitutes an outer shell of a storage chamber for storing the engine 301, the exhaust gas purification device 400, a heat exchanger, various hydraulic devices, and the like. Openings on the left and right sides of the building 122 are covered by a pair of left and right building covers 130 that can be opened and closed. The building cover 130 is a gull wing type opening / closing cover, and a pivot point (hinge) is provided between the top plate of the building 122 and the building cover 130 so as to expand substantially horizontally with respect to the ground. The building covers 130 respectively provided on the left and right sides of the wheel loader 100 have substantially symmetrical shapes on the left and right.

  FIG. 2 is a view of the rear vehicle body 120 in which the building cover 130 is fully open as viewed from the left side of the vehicle. As shown in FIG. 2, in the building 122, a storage chamber (storage space) provided inside is divided by a partition wall 160 into an engine chamber 122E on the front side of the vehicle and a cooler chamber 122C on the rear side of the vehicle .

  As shown in FIG. 1, the side surface of the engine compartment 122E is covered by a part of a building cover 130, and the upper surface of the engine compartment 122E is covered by an engine hood 140 which constitutes a top plate of the building 122. The front face of the engine compartment 122E is covered by a front plate (not shown), and the rear face of the engine compartment 122E is covered by a partition 160. That is, the engine compartment 122E is defined by a part of the pair of left and right building covers 130, the engine hood 140, the front plate (not shown), and the partition wall 160.

  The side surface of the cooler chamber 122C is covered by a part of the building cover 130, and the upper surface of the cooler chamber 122C is covered by a cooler building cover 132 which constitutes a top plate of the building 122. The front surface of the cooler chamber 122C is covered by a partition 160, and the rear surface of the cooler chamber 122C is covered by a grill 200. That is, the cooler room 122 C is defined by a part of the pair of left and right building covers 130, the cooler building cover 132, the partition wall 160, and the grille 200.

  A heat exchanger unit 501 and a cooling fan unit 502 are disposed inside the cooler chamber 122C. The heat exchanger unit 501 includes a plurality of heat exchangers such as a radiator for cooling the cooling water of the engine 301, an oil cooler for cooling the hydraulic oil, and an intercooler for cooling air pressurized by the supercharger of the engine 301. And a radiator frame for supporting these heat exchangers. The cooling fan unit 502 includes a cooling fan 503 (see FIG. 8) that generates cooling air for cooling the heat exchanger unit 501, and a shroud that supports the cooling fan 503. A heat exchanger such as a transmission oil cooler or a condenser of an air conditioner for air conditioning of the operation room 121 is also attached to the heat exchanger unit 501 depending on the type of the wheel loader.

  As shown in FIG. 8, the cooling fan unit 502 includes a cooling fan 503 driven by a hydraulic fan motor (not shown), and is disposed behind the heat exchanger unit 501. The cooling fan 503 is disposed so as to suck the outside air from the intake opening 131 of the building cover 130 and to blow the outside air toward the exhaust opening 210 of the grill 200.

  As shown in FIG. 1, an intake pipe 145 for taking in air required for driving the engine 301 from the outside via an air cleaner 310 (see FIG. 2) protrudes from the upper surface of the building cover 132 for the cooler. As shown in FIG. 2, the air cleaner 310 is provided immediately after the partition wall 160 in the cooler chamber 122 </ b> C. The air cleaner 310 is connected to the engine 301 via an intake pipe.

  As shown in FIG. 1, the exhaust gas purification device 400 is a device for purifying the exhaust gas discharged from the engine 301, and is disposed above the engine 301 in the engine chamber 122E. A tail pipe 171 for exhausting the exhaust gas protrudes from the engine hood 140.

  Although not shown, the exhaust gas purification device 400 includes an oxidation catalyst device installed in the exhaust flow path of the engine 301, a NOx purification device, and a urea water injection device. The oxidation catalyst device includes an oxidation catalyst (DOC: Diesel Oxidation Catalyst) that oxidizes and removes nitrogen monoxide (NO), carbon monoxide (CO), hydrocarbons (HC) and the like contained in exhaust gas. The NOx purification device is a device provided with a reduction catalyst that reduces and purifies nitrogen oxides (NOx) contained in exhaust gas using a urea aqueous solution (hereinafter referred to as urea water) as a reducing agent. The NOx purification device has, for example, a structure in which a urea SCR (Selective Catalytic Reduction) is provided on the upstream side in the cylinder and an oxidation catalyst is provided on the downstream side of the urea SCR. The urea water injection device is installed upstream of the NOx purification device.

  FIG. 3 is a perspective view showing the inside of the cooler chamber 122C. In FIG. 3, illustration of a building cover 130, an engine hood 140, a building cover 132 for a cooler, a grill 200 and the like which constitute the outer shell of the building 122 is omitted. The urea water injection device is connected to the urea water tank 127 via the urea water supply pipes 425a and 425s. The urea aqueous solution tank 127 is a container for storing urea aqueous solution as a reducing agent. A urea water pump 128 is provided between the urea water injection device in the engine chamber 122E and the urea water tank 127 in the cooler chamber 122C. The urea water pump 128 is fixed to the partition 160 inside the cooler chamber 122C. The urea water pump 128 is an electric pump that feeds urea water to the urea water injection device that constitutes the exhaust gas purification device 400.

  The urea water injection device injects the urea water supplied from the urea water tank 127 by the urea water pump 128 into the exhaust flow path. When the urea water is injected, ammonia is generated from the urea water by the urea SCR of the NOx purification device, and the ammonia in the exhaust gas is reduced by the ammonia to be decomposed into water and nitrogen. Ammonia in the exhaust gas is reduced by the oxidation catalyst provided downstream of the urea SCR of the NOx purification device.

  As shown in FIG. 3, the rear frame 220 constituting the rear vehicle body 120 includes a pair of left and right vertical plates 221 and a pair of left and right vertical plates 221 at a front end and a rear end (a front end The side plate of the is not shown) and is formed in a rectangular frame shape.

  A support frame 161 is provided inside a pair of left and right vertical plates 221 via a bracket welded to the vertical plates 221. The support frame 161 is a gate-shaped support member, and the left and right legs are attached to the left and right vertical plates 221, respectively. The flat partition 160 described above is attached to the support frame 161 by fastening members such as bolts and nuts.

  A mount bracket 231, which is a support plate extending in the left-right direction, is fixed to the pair of left and right vertical plates 221. In the mounting bracket 231, both left and right end portions are fastened and fixed to an L-shaped mounting bracket welded to the vertical plate 221, for example, by fastening members such as bolts and nuts. A fan valve unit 290 for controlling the operation of the hydraulic fan motor for driving the cooling fan 503 described above and a urea water tank 127 are mounted on the mount bracket 231 in a mounted state.

  FIG. 4 is an exploded perspective view showing the mount bracket 231 and the urea aqueous solution tank 127. As shown in FIG. The mounting bracket 231 has a flat plate portion 232 in the form of a rectangular flat plate, and a side plate portion 233 vertically rising from the long side portion of the flat portion 232. The flat plate portion 232 is disposed to be substantially parallel to the horizontal surface. The side plate portion 233 on the front side of the vehicle and the side plate portion 233 on the rear side of the vehicle have different heights but the configurations are the same, and therefore one will be described.

  The side plate portion 233 is a rectangular flat member, and two pressing members 234 are provided. The pressing member 234 is an L-shaped metal plate having a predetermined width, and is bent 90 degrees downward from the short portion 234a extending horizontally from the upper end of the side plate portion 233 in the back and forth direction and extends in the vertical direction And a long portion 234b. In the pressing member 234, the end of the short portion 234a is welded to the upper end of the side plate portion 233, and the end of the long portion 234b is welded to the flat portion 232.

  The long portion 234b of the pressing member 234 on the front side of the vehicle and the long portion 234b of the pressing member 234 on the rear side of the vehicle are disposed to face each other in the front-rear direction, and the dimension between the pair of front and rear long portions 234b Is a first length W1. The length in the transverse direction of the long portion 234b, that is, the width dimension, is set to be slightly shorter than the width dimension of the first groove 271a of the wide surface 271 of the urea water tank 127 described later.

  The urea water tank 127 has a substantially rectangular parallelepiped shape, and a pair of wide surfaces 271 facing each other are disposed in the front and back, and a pair of narrow surfaces 272 facing each other are disposed in the left and right. Of the pair of narrow surfaces 272, the narrow surface 272 disposed on the left side of the vehicle is also referred to as a front portion 272f. The connection portion of the urea water pipe is provided on the upper surface 273 of the urea water tank 127, and the bottom surface of the urea water tank 127 is in contact with the flat plate portion 232 of the mount bracket 231.

  The left end portion of the upper surface 273 parallel to the horizontal surface of the urea water tank 127 and the upper end portion of the front portion 272 f parallel to the vertical direction are connected by the inclined surface 274. A cylindrical water supply cylinder 275, which is inclined at an angle of about 40 to 50 degrees with respect to the flat plate portion 232 of the mount bracket 231, protrudes from the inclined surface 274. A water supply port 276, which is a circular opening, is provided at the tip end of the water supply cylinder 275, and a water supply cap covering the water supply port 276 is provided.

  On the wide surface 271 of the urea water tank 127, a first groove 271a recessed inward extends in the vertical direction. On the upper surface 273 of the urea aqueous solution tank 127, a second groove 273a recessed inward extends in the front-rear direction. The first groove 271a is a recess into which the long portion 234b of the pressing member 234 described above is fitted. The second groove 273a is a recess in which a pressing plate 241 (see FIG. 5) described later is fitted.

  The first groove 271a (not shown in FIG. 4) on the front side of the vehicle and the first groove 271a on the rear side of the vehicle are disposed to face each other in the front-rear direction, and the pair of front and rear first grooves 271a The dimension between the bottoms is a second length W2.

  FIG. 5 is a perspective view showing the urea water tank 127 attached to the mount bracket 231. FIG. 6 is a view of the mounting structure of the urea water tank 127 shown in FIG. 5 as viewed from the left side of the vehicle. As shown in FIGS. 5 and 6, the urea water tank 127 is attached by an attachment member such as a connector 242, a nut 243, and a pressing plate 241 while being mounted on the flat plate portion 232 of the mount bracket 231. The connector 242 is formed by bending the shaft of a J-bolt, and a hook-shaped hook portion 242a (see FIG. 6) is provided at one end (lower end), and a pressing plate 241 is provided at the other end (upper end). There is provided an externally threaded portion to which a nut 243 for fastening is screwed.

  FIG. 7 is an enlarged perspective view showing a hook portion 242a and an attachment hole 233h to which the hook portion 242a is attached. As shown in FIGS. 4 and 7, the side plate portion 233 of the mount bracket 231 is provided with an attachment hole 233 h in which the hook portion 242 a of the connector 242 is hooked. The mounting hole 233 h is provided to face the long portion 234 b of the pressing member 234.

  As shown in FIG. 5 and FIG. 6, the pressing plate 241 is a long member made of a flat plate, and at the both ends in the longitudinal direction, insertion holes through which the shaft portion of the connector 242 is inserted are provided. The length in the widthwise direction of the central portion excluding both ends of the pressing plate 241, that is, the width dimension is slightly shorter than the width dimension of the second groove 273a (see FIG. 4) of the upper surface 273 of the urea water tank 127. It is assumed to be in size.

  The mounting method of the urea water tank 127 is as follows. As shown in FIG. 4, the urea water tank 127 is lowered from above onto the flat plate portion 232 of the mount bracket 231 so that the first groove 271 a of the urea water tank 127 is fitted to the pressing member 234. At this time, since the first groove 271a and the pressing member 234 are fitted, positioning of the urea aqueous solution tank 127 and an operation of lowering the urea aqueous solution tank 127 can be easily performed.

  When the bottom surface of the urea water tank 127 is lowered to a position where it abuts on the flat plate portion 232 of the mount bracket 231, the urea water tank 127 is temporarily fixed by the four pressing members 234. The first length W1 in the state before the urea water tank 127 is attached to the mount bracket 231 is shorter than the second length W2 in the state before the urea water tank 127 is attached to the mount bracket 231 ( W1 <W2).

  The urea water tank 127 is a container made of resin, and is configured to be elastically deformable. For this reason, the urea water tank 127 is pressed by the pair of front and rear pressing members 234 from the front and rear direction of the vehicle, and is disposed between the pair of pressing members 234 in a state of being slightly elastically deformed.

  As shown in FIG. 7, the flange portion 242 a of the connector 242 is inserted into the attachment hole 233 h of the side plate portion 233 of the mount bracket 231. As shown in FIGS. 5 and 6, the upper end portion of the connector 242 is inserted into the insertion hole of the pressing plate 241, and the nut 243 is screwed into the external thread portion of the upper end portion of the connector 242. In the present embodiment, the pressing plate 241 is fastened to the upper surface 273 of the urea water tank 127 by the double nut.

  When the nut 243 is screwed into the connector 242, the collar portion 242a shown in FIG. 7 is pulled upward, and the curved portion of the collar portion 242a engages with the upper opening edge of the attachment hole 233h. That is, the hook portion 242a is hooked on the mounting hole 233h. Further, the pressing plate 241 shown in FIGS. 5 and 6 is pulled downward, and the pressing plate 241 presses the upper surface 273 of the urea water tank 127 downward.

  The urea water tank 127 is vertically held by the upper pressure plate 241 and the flat plate portion 232 of the lower mount bracket 231, and movement in the vertical direction is restricted. Further, as described above, the urea water tank 127 is held in the front-rear direction by the pair of front and rear pressing members 234, and the movement in the front-rear direction is restricted. Note that two pairs of front and rear pressing members 234 are provided in the left and right direction of the vehicle. For this reason, movement of the urea water tank 127 so as to tilt in the horizontal plane is restricted. Furthermore, since the pair of front and rear pressing members 234 is fitted in the first groove 271a (see FIG. 4) of the wide surface 271 of the urea water tank 127, the movement in the lateral direction is also restricted. As described above, the movement of the urea water tank 127 in the up, down, left, right, and left directions is restricted, so that positional deviation does not occur even when vibration or an impact is applied to the vehicle.

  The procedure for removing the urea aqueous solution tank 127 is the reverse of the above-described installation procedure, so the description is omitted. Since the urea aqueous solution tank 127 can be attached and detached by attaching or detaching a nut 243 located above the urea aqueous solution tank 127, the workability of replacing the urea aqueous solution tank 127 is good.

  As shown in FIGS. 3 and 5, the flat plate portion 232 of the mount bracket 231 on which the urea aqueous solution tank 127 is mounted is provided at a position lower than the lower end portion of the opening 122 a of the building 122. The lower opening edge of the opening 122 a of the building 122 is configured by the upper end of the vertical plate 221 of the rear frame 220.

  As shown in FIG. 6, the distance HL in the vertical direction from the lower end portion of the opening 122a to the flat plate portion 232 of the mount bracket 231 (that is, the bottom surface of the urea water tank 127) is the urea water tank 127 from the lower end of the opening 122a. Preferably, it is larger than the vertical distance HU to the upper surface of the (HL> HU). Furthermore, the distance HL is more preferably greater than the vertical distance HF from the lower end of the opening 122a to the center point P of the water supply port 276 (HL> HF).

  As shown in FIG. 2, the fuel tank 601 in which the fuel is stored is fixed with the upper support structure (not shown) mounted on the rear frame 220 and is suspended at the lower rear of the rear frame 220. There is. A fuel supply pipe 602 is attached to the fuel tank 601. The fuel supply pipe 602 has a proximal end vertical pipe projecting upward from the fuel tank 601, a proximal end inclined pipe extending obliquely rearward and upward from the tip of the proximal end vertical pipe, and a tip of the proximal end inclined pipe. And a tip-side inclined pipe 602a (see FIG. 9) projecting obliquely upward to the left from the tip of the tip-side vertical pipe. As shown in FIG. 9, the tip end side inclined pipe 602 a is inclined at an angle of about 40 to 50 degrees with respect to the flat plate portion 232 (see FIG. 3) of the mount bracket 231. A filler opening 603 which is a circular opening surface is provided at the tip end of the tip end side inclined pipe 602 a, and a filler cap covering the filler opening 603 is provided.

  By the way, even if the interval of refilling urea water to the urea water tank 127 and the interval of refilling fuel to the fuel tank 601 are different, they may be performed simultaneously or continuously collectively from the viewpoint of workability. preferable. If the water supply operation and the refueling operation are performed at the respective replenishment intervals, the number of interruptions of the operation may increase and the operation efficiency may be deteriorated. For example, if the urea aqueous solution tank 127 needs to be replenished with urea aqueous solution once every 1.5 days and the fuel tank 601 needs to be replenished with fuel once a day, once a day The work efficiency can be improved if the water supply work and the refueling work are performed simultaneously or continuously.

  In the case where the water supply operation and the refueling operation are performed simultaneously or continuously in one replenishment process, it is important to improve the accessibility to the water supply port 276 and the fuel supply port 603. In the present embodiment, both the water supply port 276 and the fuel supply port 603 are provided in the vicinity of the left side surface at the rear of the vehicle. More specifically, both the water supply port 276 and the fuel supply port 603 are behind the rear wheel 123 and extend in the longitudinal direction of the vehicle, with respect to the central axis of the vehicle that divides the lateral width of the vehicle into two. It is disposed near the building cover 130 on the left side. The central axis of the vehicle refers to a straight line connecting the center of the pair of left and right rear wheels 123 and the center of the pair of left and right front wheels 113 when the vehicle is in a posture in which the vehicle advances straight.

  FIG. 8 is a perspective view showing the rear vehicle body 120 in a state in which the building cover 130 is closed, and FIG. 9 is a perspective view showing the rear vehicle body 120 in a state in which the building cover 130 is open.

  As shown in FIG. 8, the water supply port 276 and the fuel supply port 603 are respectively provided on the left side of the vehicle body, and the water supply port 276 is closed with the left building cover (hereinafter referred to as left building cover 130 L) closed. And the filler port 603 are both disposed at a position covered by the left building cover 130L. In the state where the left building cover 130L is closed, the water supply port 276 and the fuel supply port 603 are disposed to face each other in close proximity to the left building cover 130L, so the water supply port from the outside such as the vehicle left side or the vehicle rear 276 and the filler port 603 can not be viewed.

  As shown in FIG. 9, the water supply port 276 and the fuel supply port 603 are provided at positions where both the water supply port 276 and the fuel supply port 603 are exposed when the left building cover 130L is opened. As shown in FIG. 2, the water supply port 276 is disposed at the front end of the cooler chamber 122 </ b> C. The filler port 603 is disposed at the rear end of the cooler chamber 122C. In the present embodiment, the filler opening 603 is the left rear corner of the cooler chamber 122C defined by the curved cover portion 133 forming the rear end of the left building cover 130L and the upper surface of the counterweight 124. It is arranged in the space of the department.

  The heat exchanger unit 501 and the cooling fan unit 502 are disposed between the water supply port 276 and the fuel supply port 603 which are juxtaposed with a predetermined distance in the front-rear direction. As shown in FIG. 2, when viewed from the left side of the vehicle, a battery box 700 is disposed between the water supply port 276 and the fuel supply port 603. Inside the battery box 700, a battery (not shown) is accommodated. The battery box 700 is fixed to the left vertical plate 221 of the rear frame 220. The battery box 700 is also fixed to the right vertical plate 221 of the rear frame 220 (see FIG. 8). The battery box 700 is attached to the rear frame 220 at the front of the counterweight 124 and at the rear of the rear wheel 123.

  The left rear wheel 123 and the left battery box 700 are respectively located on the left side of the left vertical plate 221, and the space between the left rear wheel 123 and the left battery box 700 is a water supply port 276. The work area is accessible to

  As shown in FIG. 2, the water supply port 276 and the fuel supply port 603 are located at the same height. In the present embodiment, a virtual surface extending horizontally from the center point P of the water supply port 276 overlaps the opening surface of the fuel supply port 603, and a virtual line extending horizontally from the center point of the fuel supply port 603 is The heights of the water supply port 276 and the fuel supply port 603 are set so as to overlap the opening surface.

  As shown in FIG. 9, the water supply port 276 and the fuel supply port 603 face in the same direction, that is, in the upper left of the vehicle, respectively. In the present embodiment, the water supply cylinder 275 and the tip end side inclined pipe 602 a protrude obliquely to the upper left, and both are inclined at an angle of about 40 to 45 degrees with respect to the flat plate portion 232 of the mount bracket 231.

The urea aqueous solution and fuel replenishment process will be described.
-Cover opening process-
The worker opens the left building cover 130L upward. Thus, the water supply port 276 and the fuel supply port 603 are exposed to the outside.

-Water supply process-
The worker removes the water supply cap from the water supply port 276, and supplies urea water from the replenishment tank (not shown) to the water supply port 276 of the urea water tank 127. After the urea aqueous solution is supplied to the urea aqueous solution tank 127 to a prescribed full water state, a water supply cap is attached to the water supply port 276 to complete the water supply process. The worker uses the work area between the rear wheel 123 and the battery box 700 to perform water supply work.

-Refueling process-
The operator removes the filler cap from the filler port 603 and supplies fuel from the fuel supply facility to the filler port 603 of the fuel tank 601. After the fuel is supplied to the fuel tank 601 to the specified full state, the fueling cap is attached to the fueling port 603, and the fueling process is completed. The worker performs the refueling operation utilizing the work area between the rear wheel 123 and the battery box 700 or the open work area behind or to the left of the wheel loader.

-Cover closing process-
The worker closes the left building cover 130L downward. As a result, the water supply port 276 and the fuel supply port 603 are shut off from the outside, and direct exposure to wind and rain is prevented. The completion of the cover closing step completes the series of replenishment steps.

  In the above description, the water supply process is performed first, and after the water supply process is completed, the example in which the oil supply process is performed is described. However, after the oil supply process is performed first and the oil supply process is completed, the water supply process may be performed. . Also, the water supply process and the refueling process may be performed in parallel.

According to the embodiment described above, the following effects can be obtained.
(1) The water supply port 276 of the urea water tank 127 and the fuel supply port 603 of the fuel tank 601 are provided on one side (left side) of the vehicle body, respectively, and the outer shell of the storage chamber With the single cover (left building cover 130L) constituting the building 122) closed, the water supply port 276 and the filler port 603 are disposed at a position covered by the single left building cover 130L. When the left building cover 130L is open, both the water supply port 276 and the fuel supply port 603 are exposed.

  The cover for exposing the water supply port 276 and the fuel supply port 603 is only the single left building cover 130L. For this reason, when the worker opens the left building cover 130L, the worker can be in a state capable of performing water supply work to the water supply port 276 and refueling work to the fuel supply port 603.

  On the other hand, when the urea water tank 127 is housed in a dedicated storage box, it is necessary to open the lid of the storage box in order to perform water supply work to the water supply port 276. In order to do this, it is necessary to open the left building cover 130L. That is, different opening and closing operations of the different opening and closing members occur, and it takes time and effort.

  In the present embodiment, as described above, by opening the single left building cover 130 </ b> L that doubles as the opening and closing member for the water supply port 276 and the fuel supply port 603, both the water supply port 276 and the fuel supply port 603 can be exposed. For this reason, according to the present embodiment, it is possible to improve the working efficiency in the case where the water supply operation and the oil supply operation are performed simultaneously or in the case where they are performed continuously.

(2) The wheel loader includes a heat exchanger unit 501 having a heat exchanger (radiator) for cooling the refrigerant of the engine 301, and a cooling fan unit 502 having a cooling fan 503 for generating cooling air to the heat exchanger unit 501. And have. The storage room, which is an internal space of the building 122, includes an engine room 122E for storing the engine 301, a cooler room 122C for storing the urea water tank 127, the heat exchanger unit 501 and the cooling fan unit 502, and an engine room 122E. And the partition chamber 160 which divides the cooler chamber 122C.

  The water inlet 276 and the fuel inlet 603 are disposed in the cooler room 122C, and the left building cover 130L covers the side of the engine room 122E and the side of the cooler room 122C. The left building cover 130L is provided with an intake opening 131 for cooling air, and the grill 200 covering the rear of the cooler chamber 122C is provided with an exhaust opening 210 for cooling air.

  When the cooling fan 503 rotates, fresh outside air is drawn into the cooler chamber 122C from the intake opening 131 of the building cover 130. The outside air (air) introduced into the cooler chamber 122C is blown to the heat exchanger unit 501 as cooling air. The cooling air having passed through the heat exchanger unit 501 is blown toward the grill 200 and exhausted from the exhaust opening 210 of the grill 200. In the present embodiment, since the urea aqueous solution tank 127 is provided in the cooler chamber 122C, the urea aqueous solution tank 127 is subjected to heat exchange with fresh outside air (cooling air) without providing a cooling device dedicated to the urea aqueous solution tank. It can cool efficiently. As a result, the temperature rise of the urea water can be suppressed, and the deterioration of the quality of the urea water can be suppressed. In addition, since the cooler chamber 122C and the engine chamber 122E are partitioned by the partition wall 160, the urea aqueous solution tank 127 is prevented from being largely affected by the heat of the engine 301.

(3) The water supply port 276 is disposed at the front end of the cooler chamber 122C, and the fuel supply port 603 is disposed at the rear end of the cooler chamber 122C. The heat exchanger unit 501 and the cooling fan unit 502 are disposed between the water supply port 276 and the fuel supply port 603. By placing the water supply port 276 and the fuel supply port 603 close to each other without leaving the water supply port 276 and the fuel supply port 603 close to each other, an operator may mistake both the water supply port 276 and the fuel supply port 603 and enter fuel and urea water incorrectly. Can be prevented.

(4) The urea water tank 127 is mounted on the flat plate portion 232 of the mount bracket 231 provided at a position lower than the lower end portion of the opening 122 a of the building 122. Thereby, the position of the water supply port 276 can be lowered to improve the water supply workability.

(5) The water supply port 276 and the fuel supply port 603 are in the same direction, and are directed to one of the left and right directions of the wheel loader (in the present embodiment, to the left). And are located at the same height. In this way, the worker does not change the posture between the water supply operation and the refueling operation (for example, while the water supply operation uses a step board or the like, the posture is extended by curving the body in the refueling operation) Since the work can be performed in the same posture without changing it, the workability is good.

(6) The exhaust gas purification device 400 is disposed in the engine compartment 122E. The urea water pump 128 for feeding the urea water in the urea water tank 127 to the exhaust gas purification device 400 is fixed to the partition 160 in the cooler chamber 122C. For example, when the wheel loader is assembled, the urea solution pump 128 is fixed to the partition 160 in advance and then the partition 160 is attached to the support frame 161 to attach the partition 160 to the support frame 161 and then the urea solution pump 128 is arranged Compared to the above, the assemblability can be improved.

(7) The urea water pump 128 is disposed above the urea water tank 127, and the exhaust gas purification device 400 is disposed above the engine 301 in the engine compartment 122E. Thus, the length of the aqueous urea solution supply pipe connected to the aqueous urea solution injection device constituting the exhaust gas purification device 400 can be shortened. As a result, it is possible to increase the layout space of other devices and improve the freedom of layout.

The following modifications are also within the scope of the present invention, and one or more of the modifications can be combined with the above-described embodiment.
(Modification 1)
Although the embodiment described above describes the example in which the single cover for exposing / shutting the water supply port 276 and the fuel supply port 603 to the outside of the vehicle is the building cover 130 on the left side, the present invention is not limited thereto. For example, the water supply port 276 and the fuel supply port 603 may be disposed at positions opposite to the embodiment described above, that is, in positions close to the building cover 130 on the right side. Although not shown, the water supply port 276 and the fuel supply port 603 may be disposed at a position near the rear end of the vehicle, that is, at a position near the grill 200.

(Modification 2)
In the embodiment described above, an example is described in which the water supply port 276 and the fuel supply port 603 are in the same direction, that is, the left direction of the vehicle, and more specifically, obliquely upward in the left direction. It is not limited to this. The water supply port 276 may face the side of the vehicle, and the fuel supply port 603 may face the rear of the vehicle. In this case, the refueling operation is preferably performed from the rear of the vehicle.

(Modification 3)
Although the embodiment described above describes the example in which the water supply port 276 and the fuel supply port 603 are positioned at the same level, the present invention is not limited to this. The filling port 603 may be provided at a position higher or lower than the water supply port 276.

(Modification 4)
The flat plate portion 232 of the mount bracket 231 on which the urea water tank 127 is mounted may be provided at the same height as the lower end portion of the opening 122 a of the building 122 or at a position higher than the lower end portion.

(Modification 5)
Although the embodiment described above describes the example in which the water supply port 276 and the fuel supply port 603 are disposed in the cooler chamber 122C, the present invention is not limited to this. For example, the water supply port 276 and the fuel supply port 603 may be arranged in a storage box for storing the urea water tank 127. In this case, it is possible to expose / shut off the water supply port 276 and the fuel supply port 603 by opening and closing the single lid member of the storage box that constitutes the outer shell of the storage chamber.

(Modification 6)
Although the embodiment described above describes the example using the urea aqueous solution as the reducing agent, the present invention is not limited to this. The present invention can be applied to a working machine provided with an exhaust gas purification apparatus 400 using various reducing agents such as an aqueous ammonia solution.

(Modification 7)
In the embodiment described above, an example is described in which the cooling air generated by the cooling fan 503 is introduced into the cooler chamber 122C from the side of the vehicle and discharged to the rear of the vehicle, but the present invention is limited thereto I will not. The cooling air may be introduced into the cooler chamber 122C from the rear of the vehicle and discharged to the side of the vehicle by reversing the rotation direction of the cooling fan 503. In addition, the cooling fan 503 may be normally rotated at the normal time, and the cooling fan 503 may be temporarily reversely rotated for the purpose of dust removal.

(Modification 8)
Although the above-mentioned embodiment explained the example which applied the present invention to a wheel loader, the present invention is not limited to this, but can be applied to various work machines, such as a hydraulic shovel and a crane.

  Although various embodiments and modifications have been described above, the present invention is not limited to these contents. Other embodiments considered within the scope of the technical idea of the present invention are also included within the scope of the present invention.

122 Building (storage chamber), 122C cooler room, 122E engine room, 127 urea water tank (reducing agent tank), 128 urea water pump (reducing agent pump), 130 building cover (cover), 131 intake opening (intake port) ), 160 partitions, 200 grille, 210 exhaust opening (exhaust port), 231 mount bracket (support member), 276 water supply port, 301 engine, 400 exhaust gas purifier, 501 heat exchanger unit, 502 cooling fan unit, 503 Cooling fan, 601 fuel tank, 603 filler port

Claims (5)

  1. With the car body,
    An engine mounted on the vehicle body;
    An exhaust gas purification device disposed on the vehicle body and purifying exhaust gas discharged from the engine;
    A reducing agent tank which is mounted on the vehicle body and stores the reducing agent to be supplied to the exhaust gas purification device and has a water supply port for the reducing agent;
    A fuel tank mounted on the vehicle body, storing fuel, and having a fuel supply port for the fuel;
    A working machine comprising: an outer shell of a storage chamber in which the reducing agent tank is housed, and a single cover provided so as to be openable and closable;
    A heat exchanger for cooling a refrigerant of the engine;
    And a cooling fan for generating a cooling air for the heat exchanger,
    The water supply port and the fuel supply port are respectively provided on one side of the vehicle body, and the position where the water supply port and the fuel supply port are covered by the single cover when the single cover is closed. Place in
    The storage chamber includes an engine chamber in which the engine is stored, a cooler chamber in which the reducing agent tank, the heat exchanger, and the cooling fan are stored, and a partition that divides the engine chamber and the cooler chamber. And have
    The water supply port and the fuel supply port are disposed in the cooler chamber,
    The single cover is a building cover that covers the side of the engine compartment and the side of the cooler compartment,
    The building cover is provided with one of the inlet and outlet for the cooling air, and the grille covering the rear of the cooler chamber is provided with the other of the inlet and the outlet for the cooling air. working machine, characterized in that there.
  2. In the work machine according to claim 1,
    A working machine characterized in that both the water supply port and the fueling port are disposed on either the left or right side with respect to the central axis of the working machine.
  3. In the work machine according to claim 1 ,
    The water inlet is disposed at the front end of the cooler chamber,
    The filler opening is disposed at the rear end of the cooler chamber,
    A working machine, wherein the heat exchanger and the cooling fan are disposed between the water supply port and the fuel supply port.
  4. In the work machine according to claim 1,
    The reducing agent tank is placed on a support member provided at a position lower than the lower end of the opening of the storage chamber,
    A working machine characterized in that the water supply port and the fuel supply port are located at the same height.
  5. In the work machine according to claim 1 ,
    A reducing agent pump for feeding the reducing agent in the reducing agent tank to the exhaust gas purification device;
    The exhaust gas purification device is disposed in the engine chamber,
    The working machine, wherein the reducing agent pump is fixed to the partition wall in the cooler chamber.
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JP4451709B2 (en) * 2004-05-07 2010-04-14 キャタピラージャパン株式会社 Engine hood mounting structure for work machines
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JP2013155566A (en) * 2012-01-31 2013-08-15 Hitachi Constr Mach Co Ltd Wheel loader
EP2679429B9 (en) * 2012-06-27 2016-08-17 Caterpillar Inc. Construction machines and fuel tanks for construction machines
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WO2014192174A1 (en) * 2013-09-25 2014-12-04 株式会社小松製作所 Motor grader
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