Excavator

Abstract

To provide a shovel which improves workability of oil-feeding work of a fuel.SOLUTION: A shovel includes: a urea water tank arranged in a space formed in front of a fuel tank; and a fuel pump arranged above the urea water tank in the space.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present disclosure relates to a shovel. [Background technology]

[0002] A shovel is disclosed in which a space is formed in front of a urea water tank inside a treatment agent tank cover, and an oil supply pump is housed in this space (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-125242 A Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, the treatment agent tank cover of the excavator disclosed in Patent Document 1 is provided with an opening and closing door that is opened when accessing the fuel supply pump. It is also disclosed that the opening and closing door is provided above or in front of the fuel supply pump. Therefore, when fueling the fuel tank using the fuel supply pump, the hose connected to the fuel supply pump must be routed around the opening and closing door, and the hose becomes long. Therefore, it takes time to route and store the hose when fueling, and workability decreases.

[0005] In view of the above problems, an object of the present invention is to provide a shovel that improves the workability of fuel supply operations. [Means for solving the problem]

[0006] In order to achieve the above object, in one embodiment of the present invention, a fuel tank is provided in front of the fuel tank. a urea water tank cover arranged on the tank; Formed internal space Inside a urea water tank disposed in the internal In space and a fuel pump disposed above the urea water tank; the urea water tank cover includes a storage section that is disposed within the internal space and laterally outboard of the urea water tank and that stores a fuel hose connected to the fuel pump; a nozzle receiver that is disposed within the internal space and laterally outboard of the urea water tank and that holds a nozzle connected to an end of the fuel hose; and an openable side door that is provided on a side surface of the urea water tank cover that is laterally outboard, the side door being configured so that by opening the side door, an operator can remove the nozzle from the nozzle receiver while standing on the ground, and can take out the nozzle and the fuel hose from the internal space of the urea water tank cover. Shovel provided. Effect of the Invention

[0007] According to the above-described embodiment, a shovel that improves the workability of fuel supplying work can be provided. [Brief description of the drawings]

[0008] [Figure 1] FIG. [Diagram 2] FIG. [Diagram 3] FIG. 2 is a plan view of an upper rotating body of the shovel as viewed from above. [Figure 4] FIG. 2 is a perspective view of the shovel as viewed from the front right side. [Diagram 5] FIG. 4 is a perspective view of the shovel illustrating the structure inside the processing agent tank cover. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] An embodiment of the present invention will be described with reference to the drawings.

[0010] Fig. 1 is a left side view of a shovel as an example of a construction machine according to an embodiment, and Fig. 2 is a right side view of the shovel.

[0011] As shown in Figs. 1 and 2, the excavator has a lower traveling body 1, an upper rotating body 2, a cab 3, a boom 4, an arm 5, and a bucket 6. The upper rotating body 2 is mounted on the lower traveling body 1 via a rotating mechanism (not shown). A cab 3 is provided on the front left part of the upper rotating body 2. One end of a boom 4 is rotatably attached to the center of the front part of the upper rotating body 2. An arm 5 is rotatably attached to the tip of the boom 4. A bucket 6, which is an end attachment, is rotatably attached to the tip of the arm 5. An end attachment such as a breaker or a crusher may be attached to the tip of the arm 5 instead of the bucket 6, which is an excavation attachment.

[0012] Fig. 3 is a plan view showing a schematic configuration of the upper rotating body 2. As shown in Fig. 3, an engine room 7 (indicated by a dashed line) is formed at the rear of the upper rotating body 2. A diesel engine 8 is installed in the engine room 7. As shown in Fig. 1, an SCR system 110 (selective catalytic reduction system) is arranged above the diesel engine 8. The SCR system 110 includes an exhaust gas treatment device 10 that purifies exhaust gas discharged from the diesel engine 8. A hydraulic pump 21 is arranged below the SCR system 110. A cooling fan 12 is provided on the diesel engine 8, and a heat exchanger unit 13 including a radiator is arranged in front of the cooling fan 12.

[0013] An air cleaner 63 (air filter) is disposed to the side (the front side as viewed from the shovel) of the heat exchanger unit 13. The air cleaner 63 is connected to the diesel engine 8 via an intake pipe 64. Air filtered by the air cleaner 63 is supplied to the diesel engine 8 through the intake pipe 64.

[0014] An exhaust pipe 9 for discharging engine exhaust (hereinafter referred to as "exhaust gas") is connected to the diesel engine 8. An exhaust gas treatment device 10 that complies with high-tier exhaust gas regulations is installed at the downstream end of the exhaust pipe 9. In this embodiment, a urea selective reduction type NOx treatment device that uses a urea aqueous solution (liquid reducing agent) is used as the exhaust gas treatment device 10.

[0015] The cab 3 is disposed at the front left side of the upper rotating body 2. Here, in this specification, the front of the upper rotating body 2 refers to the part on the side where the boom 4 is attached when viewed from the center of the upper rotating body 2. Additionally, the front refers to the direction in which the boom 4 extends when viewed from the center of the upper rotating body 2. Additionally, the left side refers to the part that is on the left when the upper rotating body 2 faces forward (the direction in which the boom 4 extends). Additionally, the right side refers to the part that is on the right when the upper rotating body 2 faces forward (the direction in which the boom 4 extends).

[0016] A hydraulic oil tank 120 for storing hydraulic oil used in the hydraulic system is disposed behind the cab 3. Behind the hydraulic oil tank 120, the above-mentioned exhaust gas treatment device 10 is disposed.

[0017] Meanwhile, a fuel tank 19 for storing diesel engine fuel such as diesel oil is disposed in front of the engine compartment 7. The diesel engine fuel stored in the fuel tank 19 is supplied to the diesel engine 8 via a fuel supply pipe (not shown). A urea water tank (treatment agent tank) 20 for storing a treatment agent (urea solution (liquid reducing agent)) used by the exhaust gas treatment device 10 is disposed in front of the fuel tank 19. The treatment agent stored in the urea water tank 20 is supplied to the exhaust gas treatment device 10 by a treatment agent pump 20b provided in the middle of the treatment agent supply pipe 20a. Note that the urea water solution (liquid reducing agent) is one example of a treatment agent, and other treatment agents may be used as the liquid reducing agent, or other treatment methods may be used. The urea water tank 20 is covered with a treatment agent tank cover 40 (see FIG. 2). A tool box 22 for storing work tools and work machines is disposed in front of the urea water tank 20. The tool box 22 is covered with a tool box cover 50 (see FIG. 2). A fuel pump 19b (described later) is disposed within the treatment agent tank cover 40. A space (accommodation section) 45 (described later) is formed within the treatment agent tank cover 40 on the outer side (right side) of the urea water tank 20 in the lateral direction.

[0018] The boom 4 is rotatably supported by a boom support bracket 17 that is firmly fixed to the front center of the revolving frame 2a of the upper revolving body 2. More specifically, the boom 4 is sandwiched between a right bracket 17R and a left bracket 17L of the boom support bracket 17 and supported by a boom foot pin 100 that penetrates the right bracket 17R, the boom 4, and the left bracket 17L.

[0019] Next, the arrangement of the fuel tank 19, the urea water tank 20, the tool box 22, and the fuel pump 19b will be further described with reference to Figures 4 and 5. Figure 4 is a perspective view of the shovel as viewed from the front right side.

[0020] A fuel filler port 19a for pouring fuel into the fuel tank 19 is provided on the upper surface of the fuel tank 19. This allows fuel to be supplied to the fuel tank 19 from the fuel filler port 19a by a fuel supply device (not shown) outside the excavator.

[0021] A cover CV is provided in front of the fuel tank 19, and a processing agent tank cover 40 is disposed further in front of it. The upper surface of the processing agent tank cover 40 is partially lowered and a step is provided. This step forms a staircase used when an operator climbs up to the upper rotating body 2. A handrail GR and a guardrail HR are provided on the upper surface of the processing agent tank cover 40. An operator can hold the handrail GR and the guardrail HR when climbing up to the upper rotating body 2. An openable side door 41 is provided on the right side surface of the processing agent tank cover 40. The side door 41 is configured to be prevented from opening too far by a rail RA and a stay ST. One end of the stay ST is rotatably attached to a plate PL, and the other end is slidably attached to a rail RA. The plate PL is fixed to the rotating frame 2a. In FIG. 5, a cross pattern is provided on the plate PL for clarity.

[0022] A tool box cover 50 is disposed in front of the treatment agent tank cover 40. The tool box 22 is disposed inside the tool box cover 50. The upper surface of the tool box cover 50 is also used as part of the stairs used when a worker climbs up onto the upper rotating body 2.

[0023] Fig. 5 is a perspective view of the excavator illustrating the structure inside the treating agent tank cover 40. Note that Fig. 5 shows a state in which the side door 41 is open. Also, the treating agent tank cover 40, the tool box cover 50, the tool box 22, the boom 4, and the boom foot pin 100 are removed in the illustration. Also, the position where the tool box 22 is located is shown by a dashed line.

[0024] An internal space 40a covered by a processing agent tank cover 40 is formed in front of the fuel tank 19. The urea water tank 20 is disposed in this internal space 40a. Here, the processing agent tank cover 40 and the tool box cover 50 are utilized as part of a staircase that an operator uses when climbing up to the upper rotating body 2, and therefore the upper plate of the processing agent tank cover 40 is formed higher than the upper surface of the processing agent tank cover 40. Therefore, within the processing agent tank cover 40, there is a space above the urea water tank 20 in which a fuel pump 19b, which will be described later, can be disposed. In addition, a water supply port 20c for pouring urea water into the urea water tank 20 is formed extending upward from the urea water tank 20.

[0025] In addition, the processing agent tank cover 40 accommodates a fuel pump 19b, fuel hoses 19c and 19d, and a nozzle 19e. The nozzle 19e is provided with a check valve and is configured to be able to suck in fuel. The nozzle 19e may also be provided with a filter to prevent foreign matter from being sucked into the fuel pump 19b. One end of the fuel hose 19d is connected to the nozzle 19e. The other end of the fuel hose 19d is connected to the suction port of the fuel pump 19b. One end of the fuel hose 19c is connected to the discharge port of the fuel pump 19b. The other end of the fuel pump 19b is connected to the upper side of the front wall surface of the fuel tank 19. By connecting the nozzle 19e to a replenishment fuel tank (not shown, for example, a drum containing fuel) that contains fuel and is provided outside the shovel, and operating the fuel pump 19b, fuel can be sucked up from the replenishment fuel tank and supplied to the fuel tank 19 of the shovel.

[0026] The fuel pump 19b is disposed above the urea water tank 20 in the internal space 40a of the treatment agent tank cover 40. The fuel pump 19b is attached to the front outer wall surface of the fuel tank 19 via a mounting plate. The fuel pump 19b is disposed at a position that does not interfere with the boom foot pin 100 when the boom foot pin 100 is pulled out of the pin hole PH of the boom support bracket 17 (right bracket 17R and left bracket 17L) for maintenance. The pin hole PH is formed at a position higher than the water supply port 20c.

[0027] In the above description, the connection from the discharge port of fuel pump 19b to fuel tank 19 is configured to be connected by fuel hose 19c, but this is not limited thereto, and the connection may be configured to be made by a pipe joint.

[0028] In addition, the internal space 40a of the treatment agent tank cover 40 has a space 45 on the outer side (right side) of the urea water tank 20. That is, the space 45 is provided between the right side wall of the urea water tank 20 and the side door 41 of the treatment agent tank cover 40. The fuel hose 19d and the nozzle 19e extending from the fuel pump 19b are accommodated in the space 45. Specifically, a partition plate DP is disposed between the fuel hose 19d and the urea water tank 20. The partition plate DP is formed in a box shape so as to accommodate a part of the fuel hose 19d. In FIG. 5, for clarity, the box-shaped partition plate DP is given a diagonal line pattern, and the part of the fuel hose 19d accommodated in the box-shaped partition plate DP is represented by a dashed line.

[0029] A nozzle receiver 42 is provided in the space 45 to hold the nozzle 19e when the fuel hose 19d and the nozzle 19e are housed in the treatment agent tank cover 40. In the example of Fig. 5, the nozzle receiver 42 has an opening penetrating in the vertical direction, and holds the nozzle 19e by inserting the nozzle 19e into the opening. This prevents the nozzle 19e from moving within the space 45 when, for example, the upper rotating body 2 rotates.

[0030] The space 45 has a switch box (operation unit) 43 that instructs the operation of the fuel pump 19b. A signal from the switch box 43 is connected to a controller (not shown) of the excavator. For example, when the switch box 43 is turned ON, the controller operates the fuel pump 19b to start refueling. The controller monitors the level meter of the fuel tank 19, and when the value of the level meter exceeds a predetermined threshold, the controller can stop the fuel pump 19b and end refueling.

[0031] A locking portion 41a is provided on the side door 41. The locking portion 41a can be engaged with a locking portion (not shown) of the tool box cover 50 to close the side door 41.

[0032] As described above, according to the excavator of this embodiment, by disposing the fuel pump 19b above the urea water tank 20 inside the treatment agent tank cover 40, the length of the fuel hose 19c can be shortened compared to a configuration in which the fuel pump is disposed in front of the urea water tank 20. This makes it possible to reduce the number of brackets and the like for fixing the fuel hose 19c. In addition, by shortening the hose length, it is possible to suppress a decrease in the fuel supply speed. In addition, the volume of the tool box 22 provided in front of the urea water tank 20 can be increased.

[0033] Moreover, according to the shovel of this embodiment, a side door 41 is provided on the side of the treatment agent tank cover 40, and the fuel hose 19d and the nozzle 19e can be accommodated in the space 45. As a result, when refueling a replenishment fuel tank (not shown), the worker can open the side door 41 while standing on the ground without climbing up on the shovel, remove the nozzle 19e from the nozzle receiver 42, and take out the nozzle 19e and the fuel hose 19d from the internal space 40a of the treatment agent tank cover 40. In addition, the worker can operate the switch box 43 while standing on the ground without climbing up on the shovel. This improves the workability of the refueling work using the fuel pump 19b. In addition, since the fuel hose 19d can be arranged to reduce bending and twisting during refueling, a decrease in the refueling speed can be suppressed. [Explanation of symbols]

[0034] 1 Undercarriage 2 Upper rotating body 19 Fuel Tank 19a Fuel filler 19b Fuel pump 19c,19d Fuel hose 19e Nozzle 20. Urea tank 20c water inlet 22 Tool box 40 Processing agent tank cover 40a Interior space (space) 41 Side door 41a Locking part 42 Nozzle holder 43 Switch Box 45 Space (container) 50 Tool Box Cover

Claims

1. a urea water tank cover disposed in front of the fuel tank; a urea water tank disposed in an internal space formed by being covered with the urea water tank cover; a fuel pump disposed in the internal space and above the urea water tank; a housing portion that is disposed within the internal space and is disposed laterally outward of the urea water tank, the housing portion housing a fuel hose that is connected to the fuel pump; a nozzle receiver that is disposed within the internal space and that is disposed outward in the lateral direction from the urea water tank and that holds a nozzle that is connected to an end of the fuel hose; an openable / closable side door provided on an outer side surface of the urea water tank cover in the lateral direction, By opening the side door, an operator can remove the nozzle from the nozzle receiver while standing on the ground, and can take out the nozzle and the fuel hose from the internal space of the urea water tank cover. Shovel.

2. an operation unit that is disposed in the internal space and is disposed outward in the lateral direction from the urea water tank and that instructs an operation of the fuel pump, By opening the side door, an operator can operate the operation unit while standing on the ground. The shovel according to claim 1.

3. a tool box cover disposed in front of the urea water tank cover, The side door has a locking portion that locks with the tool box cover. The shovel according to claim 1 or 2.

4. The fuel pump is positioned so as not to interfere with the boom foot pin when it is pulled out of the pin hole. The shovel according to any one of claims 1 to 3.

Images