JP2016102359A - Construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a construction machine enabling a fuel feeding device to be mounted thereon without reducing a capacity of a fuel tank, and capable of improving assembly workability of the fuel feeding device.SOLUTION: A fuel tank 14 is provided at the front side of a hydraulic oil tank 11. A door attachment support 16 is provided on an outer side surface 11A1 side of the hydraulic oil tank 11 between the hydraulic oil tank 11 and the fuel tank 14. A right front side surface cover 44 covering the outer side surface 11A1 of the hydraulic oil tank 11 is provided on the support 16. A fuel feeding device 28 for feeding fuel stored in an external fuel storage source to the fuel tank 14 is disposed in a storage space 15 formed between the hydraulic oil tank 11 and the support 16, and the fuel feeding device 28 is attached to the support 16.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a construction machine such as a hydraulic excavator, and more particularly to a construction machine provided with a fuel supply device for replenishing a fuel tank.

  In general, a hydraulic excavator, which is a typical example of a construction machine, includes a lower traveling body, an upper swinging body that is turnably mounted on the lower traveling body, and a front device that is provided on the upper swinging body so as to be able to move up and down. It is constituted by.

  The upper swing body constitutes a support structure to be attached to the lower traveling body, a swing frame in which a foot portion of the front device is attached to the left and right intermediate portions on the front side of the support structure, and the front device. A counterweight provided at the rear of the swing frame to balance the weight of the engine, and an engine mounted on the front side of the counterweight in a horizontally installed state extending leftward and rightward at the rear of the swing frame A cab provided on the front side of the engine and on the left and right sides with the foot portion of the front device sandwiched between the cab and the left and right sides on the front side of the engine and the foot portion of the front device. A hydraulic oil tank provided on the side for storing hydraulic oil, and a fuel tank provided on the swivel frame adjacent to the front side of the hydraulic oil tank for storing fuel.

  Here, when fuel is supplied to the hydraulic excavator, the fuel tank can be used to supply fuel to the fuel tank. Further, in order to cope with a work site where a refueling vehicle cannot enter, a hydraulic excavator includes a fuel refueling device for replenishing fuel from a container to a fuel tank in advance (for example, Patent Documents). 1).

JP 2009-133189 A

  By the way, according to Patent Document 1, the fuel refueling device is disposed in a space formed between the fuel tank and the side door that covers the outer surface of the fuel tank. In this case, there is a problem that the capacity of the fuel tank is reduced by the amount provided for the space for disposing the fuel supply device.

  Further, according to Patent Document 1, each device constituting the fuel supply device is attached to a separate bracket. Therefore, when the fuel supply device is mounted on the hydraulic excavator, it is necessary to separately attach each device of the fuel supply device to the hydraulic excavator. In this case, since each device must be assembled on the body of the hydraulic excavator, there is a problem that the assembly work is troublesome.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to mount the fuel supply device without reducing the capacity of the fuel tank and to improve the workability of the assembly operation of the fuel supply device. It is to provide a construction machine that can be improved.

  A construction machine according to the present invention includes a self-propelled lower traveling body, an upper revolving body that is turnably mounted on the lower traveling body, and a front device that is provided on the upper revolving body so as to be able to move up and down. The upper revolving structure forms a support structure for mounting to the lower traveling structure, and a revolving frame in which a foot portion of the front device is attached to an intermediate portion in the left and right directions on the front side of the support structure; A counterweight provided at the rear part of the revolving frame in order to balance the weight with the front device, and a laterally placed leftward and rightward at the rear part of the revolving frame located on the front side of the counterweight An engine mounted in a state, a cab provided on the front side of the engine and on one side of the left and right sides of the foot portion of the front device, a front side of the engine and the hood A hydraulic oil tank that is provided on the other side in the left and right directions across the foot portion of the brake device and stores hydraulic oil, and a fuel tank that is provided on the revolving frame adjacent to the front side of the hydraulic oil tank and stores fuel In the construction machine comprising the hydraulic oil tank, a door mounting support is provided between the hydraulic oil tank and the fuel tank on the outer surface side of the hydraulic oil tank. A fuel refueling device for providing a fuel stored in an external fuel storage source to the fuel tank in a housing space provided between the hydraulic oil tank and the support, provided with a side door covering an outer side surface The fuel refueling device is configured to be attached to the support.

  According to the construction machine of the present invention, the fuel refueling device can be mounted without reducing the capacity of the fuel tank, and the workability of the assembly operation of the fuel refueling device can be improved.

It is a front view which shows the hydraulic excavator applied to embodiment of this invention. It is a top view which shows the hydraulic shovel in the state where a part of front device was omitted. It is the top view which looked at the turning frame from the upper part. It is a front view of the principal part expansion which shows a hydraulic-oil tank, a support, a fuel supply apparatus, etc. in the state which opened the right front side cover. It is a perspective view which shows a fuel tank, a hydraulic-oil tank, a support, a fuel supply apparatus, etc. in the state which opened the right front side cover. It is a perspective view which shows the state which removed the right front side cover, the hydraulic-oil tank, the support, and the fuel supply apparatus from the turning frame in FIG. It is a perspective view shown in the state where a fuel supply device was attached to a support. It is a perspective view which shows a support alone.

  Hereinafter, as a construction machine according to an embodiment of the present invention, a crawler type hydraulic excavator will be described as an example and described in detail with reference to FIGS.

  In FIG. 1, a hydraulic excavator 1 as a construction machine used for excavation work of earth and sand is a self-propelled lower crawler traveling body 2 and an upper revolving body mounted on the lower traveling body 2 so as to be capable of swiveling. 3 and a front device 4 provided on the upper swing body 3 so as to be able to move up and down. The upper swing body 3 includes a swing frame 5, a counterweight 6, an engine 7, a cab 10, a hydraulic oil tank 11, a fuel tank 14, and the like.

  The front device 4 includes a boom 4A, an arm 4B, and a bucket 4C, which are rotated by a boom cylinder 4D, an arm cylinder 4E, and a bucket cylinder 4F. Here, the foot part 4A1 located on the base end side of the boom 4A is rotated to the left and right boom mounting parts 5B1 and 5C1 located above the left and right vertical plates 5B and 5C as shown in FIG. It is movably pinned.

  As shown in FIGS. 1 to 3, the revolving frame 5 constitutes a support structure for being attached to the lower traveling body 2. A foot part 4A1 of the front device 4 (boom 4A) is attached to the middle part in the left and right directions on the front side of the revolving frame 5 forming the support structure.

  The swivel frame 5 includes a thick bottom plate 5A extending in the front and rear directions, a left vertical plate 5B which is erected on the bottom plate 5A and extends in the front and rear directions with a predetermined interval in the left and right directions. The plate 5C, a plurality of left overhanging beams 5D1, 5D2, 5D3, 5D4 protruding to the left from the bottom plate 5A and the left vertical plate 5B, and a plurality of right overhanging beams 5E1, 5E2 protruding to the right from the bottom plate 5A and the right vertical plate 5C , 5E3, 5E4 and the left side frame 5F that extends to the left and right of the bottom plate 5A and the left side frame 5F that extends forward and rearward, and the front ends of the right extension beams 5E1 to 5E4 The right side frame 5G extends in the front and rear directions on the right side of the bottom plate 5A.

  A left boom mounting portion 5B1 is provided at the front upper portion of the left vertical plate 5B, and a right boom mounting portion 5C1 is provided at the front upper portion of the right vertical plate 5C. Between the left boom attachment portion 5B1 and the right boom attachment portion 5C1, a foot portion 4A1 of the boom 4A is pin-coupled so as to be rotatable.

  The counterweight 6 is provided at the rear part of the turning frame 5. The counterweight 6 is attached to the rear end side of the left vertical plate 5B and the right vertical plate 5C, and balances the weight with the front device 4.

  The engine 7 is mounted on the rear side of the revolving frame 5 in a state of being placed on the front side of the counterweight 6 (see FIG. 2). The engine 7 is configured as a diesel engine, for example.

  The heat exchange device 8 is located on the left side (one side in the left and right directions) of the engine 7 and is provided on the turning frame 5 (see FIG. 2). The heat exchange device 8 includes a radiator that cools engine cooling water, an oil cooler that cools hydraulic oil, an intercooler that cools air taken in by the engine 7, and the like.

  The hydraulic pump 9 is provided on the right side (the other side in the left and right directions) of the engine 7. The hydraulic pump 9 is driven by the engine 7 to discharge hydraulic oil from a hydraulic oil tank 11 described later as pressure oil.

  The cab 10 is provided on the left front side of the revolving frame 5. Specifically, the cab 10 is provided on the front side of the engine 7 and on the left side with the foot portion 4A1 of the front device 4 interposed therebetween. The cab 10 is used by an operator to drive the excavator 1, and includes a driver's seat on which the operator is seated, a lever for performing various operations, a pedal, and the like (all not shown). ing.

  The hydraulic oil tank 11 is provided on the front side of the engine 7 and on the right side of the foot portion 4A1 of the front device 4. As shown in FIG. 6, the hydraulic oil tank 11 includes a cylindrical circular outer surface plate 11A that forms the outer surface 11A1, a flat lower surface plate 11B that closes the lower surface of the circular outer surface plate 11A, and a circular outer surface plate 11A. It is formed as a pressure-resistant tank having a circular cross section extending upward and downward by a flat upper surface plate 11C that closes the upper surface. The hydraulic oil tank 11 stores hydraulic oil supplied to the hydraulic pump 9.

  The circular outer plate 11A is formed in a cylindrical shape by bending a single flat plate made of a metal plate such as a steel plate by roll processing or the like, and joining both ends of the curved plate by welding or the like. . Thus, by forming the hydraulic oil tank 11 in a cylindrical shape, a storage space 15 described later can be formed between the hydraulic oil tank 11, the fuel tank 14 described later, and the right front side cover 44.

  The lower surface plate 11B is a bottom plate that closes the lower end portion of the circular outer surface plate 11A, and the lower surface plate 11B has a length of four sides substantially equal to or larger than the outer diameter size of the circular outer surface plate 11A. It is formed of a rectangular metal plate (for example, a steel plate) having four sides. The lower surface plate 11B is liquid-tightly joined to the lower end side of the circular outer surface plate 11A by welding or the like. The lower surface plate 11B is attached to the right extension beams 5E2 and 5E3 of the revolving frame 5, for example. The lower surface plate 11B is provided with a supply port 11B1 for supplying hydraulic oil to the hydraulic pump 9.

  On the right front end side of the lower surface plate 11B, a support mounting bracket 12 is provided so as to be spaced apart upward and downward, for example, with two female screw holes (not shown). The support mounting bracket 12 is for mounting a support 16 described later. Further, a fuel supply port mounting bracket 13 in which, for example, two female screw holes (not shown) are formed in the center portion in the front and rear directions on the right end side of the lower surface plate 11B so as to be separated in the front and rear directions. Is provided. The fuel supply port mounting bracket 13 is for mounting a fuel supply port 38 to be described later.

  The upper surface plate 11C closes the upper end portion of the circular outer surface plate 11A. The upper surface plate 11C is formed of a rectangular metal plate (for example, a steel plate) having substantially the same size as the lower surface plate 11B. The upper surface plate 11C is liquid-tightly joined to the upper end side of the circular outer surface plate 11A by welding or the like. On the right front end side of the upper surface plate 11C, for example, two bolt insertion holes (not shown) are formed in the upper and lower directions so as to be spaced apart in the left and right directions. These two bolt insertion holes are for inserting bolts 21 for attaching a support 16 described later.

  As shown in FIG. 5, the fuel tank 14 is provided on the revolving frame 5 adjacent to the front side of the hydraulic oil tank 11. Specifically, the fuel tank 14 is disposed on the right overhanging beams 5E1 and 5E2. The fuel tank 14 stores fuel supplied to the engine 7, and is formed as a rectangular parallelepiped hollow container, for example.

  On the upper surface 14A of the fuel tank 14, for example, a fuel supply port 14A1 for supplying fuel from a fuel vehicle (not shown) protrudes upward. A supply hose connection port 14B1 is provided on the upper end side of the rear surface 14B of the fuel tank 14. The supply hose connection port 14B1 is connected to a supply hose 37C of a fuel supply device 28 described later. Further, a cable connection port 14B2 to which a later-described cable 36 is connected is provided at a right position of the supply hose connection port 14B1.

  The storage space 15 is a space formed between the circular outer surface plate 11A of the hydraulic oil tank 11 and a right front side cover 44 described later. That is, the storage space 15 is a substantially triangular column-shaped space formed at the corner of the hydraulic oil tank 11 by forming the outer side surface 11A1 of the hydraulic oil tank 11 as a circular outer surface plate 11A. A support 16 and a fuel refueling device 28 which will be described later are disposed in the housing space 15. In the state where the support 16 and the fuel refueling device 28 are disposed in the accommodation space 15, an upper space 15 </ b> A is formed above the fuel refueling device 28, and a lower space is formed below the fuel refueling device 28. 15B is formed. These upper and lower spaces 15A and 15B are used as work spaces for attaching / detaching the right front side cover 44 to / from the support 16 and for maintaining the fuel filter 31.

  Next, the configuration of the support 16 according to the present embodiment will be described.

  The support 16 is disposed in the accommodation space 15. Specifically, as shown in FIG. 5, the support 16 is provided on the outer surface 11 </ b> A <b> 1 side of the hydraulic oil tank 11 between the hydraulic oil tank 11 and the fuel tank 14. A right front side cover 44 described later is attached to the support 16, and a fuel supply pump 29 of a fuel refueling device 28 described later is attached. As shown in FIG. 8, the support 16 includes a front plate 17, an upper plate 19, an inclined plate 22, a right plate 23, a bracket 24, a switch mounting plate 25, and the like.

  The front plate 17 is formed as a plate extending between the hydraulic oil tank 11 and the fuel tank 14 in the left, right direction, and upward and downward directions. The upper right portion of the front plate 17 is inclined downward toward the right side so as to correspond to a back surface 44A of a right front side cover 44 described later. The height of the front plate 17 is slightly smaller than the height of the hydraulic oil tank 11. That is, the support 16 is configured to be disposed between the lower surface plate 11B and the upper surface plate 11C of the hydraulic oil tank 11 (see FIG. 6).

  An approximately half of the upper side of the front plate 17 is formed with an opening 17C penetrating from the front surface 17A toward the rear surface 17B. The opening 17C can be used as a working opening when a supply hose 37C described later is connected to a supply hose connection port 14B1 of the fuel tank 14.

  A supply hose insertion hole 17D penetrating from the front surface 17A toward the rear surface 17B is formed on the lower right side of the opening 17C. A supply hose 37C described later is inserted through the supply hose insertion hole 17D. Further, a cable insertion hole 17E that penetrates from the front surface 17A toward the rear surface 17B is formed in the lower portion of the front plate 17. A cable 36 described later is inserted through the cable insertion hole 17E.

  Below the cable insertion hole 17E, two bolt insertion holes 17F are spaced from each other in the upward and downward directions and penetrate from the front surface 17A to the rear surface 17B. These bolt insertion holes 17F are provided at positions corresponding to the female screw holes of the support mounting bracket 12. Then, the lower end side of the support 16 can be attached to the support mounting bracket 12 by inserting the bolt 18 into the bolt insertion hole 17F and screwing it into the female screw hole of the support mounting bracket 12.

  The upper plate 19 is bent from the upper end of the front plate 17 toward the rear. A flange 20 protruding from the front end toward the front side is fixed to the upper plate 19 by welding or the like. Two flanges 20A are formed in the flange 20 in the upward and downward directions so as to be spaced apart in the left and right directions. These female screw holes 20A are provided at positions corresponding to bolt insertion holes provided on the right front end side of the upper surface plate 11C of the hydraulic oil tank 11. Then, the upper end side of the support 16 can be attached to the upper surface plate 11C by inserting the bolt 21 into the bolt insertion hole of the upper surface plate 11C and screwing it into the female screw hole 20A.

  The inclined plate 22 extends obliquely downward to the right from the right end of the upper plate 19. The inclined plate 22 is inclined along the upper side of the back surface 44A of the right front side cover 44 described later. The right plate 23 extends downward from the lower end of the inclined plate 22. The right plate 23 has two upper and lower hinge mounting portions 23A and 23B for mounting upper and lower hinges 45 and 46 on the right front side cover 44 described later. . Two bolt insertion holes 23A1 are formed in the upper hinge attaching portion 23A so as to be spaced apart in the upward and downward directions in the left and right directions, and the lower hinge attaching portion 23B is spaced apart in the upward and downward directions. Two bolt insertion holes 23B1 are drilled in the left and right directions.

  The bracket 24 is a plate member that protrudes rearward from the rear surface 17B of the front plate 17 between the opening 17C formed in the front plate 17 and the supply hose insertion hole 17D. The front end side of the bracket 24 is fixed to the rear surface 17B of the front plate 17 and the right plate 23 by welding or the like. Female screw holes 24 </ b> C that penetrate from the upper surface 24 </ b> A to the lower surface 24 </ b> B are provided at the right front end side of the bracket 24 and the front and rear center portions on the left end side. These female screw holes 24 </ b> C are for attaching a fuel supply pump 29 to be described later to the bracket 24.

  Further, two bolt insertion holes 24D penetrating from the upper surface 24A toward the lower surface 24B are provided on the rear end side of the bracket 24 so as to be spaced apart in the left and right directions. These bolt insertion holes 24 </ b> D are for attaching a fuel filter 31 (described later) to the bracket 24.

  The switch mounting plate 25 is provided on the lower side of the bracket 24. The switch mounting plate 25 extends upward and downward between the supply hose insertion hole 17D and the cable insertion hole 17E, and is formed in a substantially crank shape in cross section. The switch mounting plate 25 has a left end side fixed to the rear surface 17B of the front plate 17 by welding or the like, and a right end side fixed to the right plate 23 by welding or the like. The switch mounting plate 25 is provided with a plurality (for example, four) of female screw holes 25A penetrating in the front and rear directions. These female screw holes 25 </ b> A are for attaching an operation switch 34 to be described later to the switch mounting plate 25.

  The upper cable mounting plate 26 is fixed to the rear surface 17B of the front plate 17 by welding or the like at the center in the upper and lower direction of the opening 17C and slightly below. On the other hand, the lower cable mounting plate 27 is fixed to the rear surface 17B of the front plate 17 on the left side of the switch mounting plate 25 by welding or the like. On these upper and lower cable mounting plates 26 and 27, a cable 36 described later, an electric wire (not shown), and the like are mounted.

  Next, the fuel supply device 28 provided for supplying fuel to the fuel tank 14 will be described.

  The fuel refueling device 28 is attached to the support 16 in a state of being disposed in a storage space 15 formed between the hydraulic oil tank 11 and the support 16. The fuel refueling device 28 is mounted between upper and lower hinges 45 and 46 for mounting a right front side cover 44 described later so as to be openable and closable. The fuel refueling device 28 is for supplying fuel stored in an external fuel storage source (for example, a container such as a drum can) to the fuel tank 14 at a work site where a fuel vehicle cannot enter, for example. is there. The fuel supply device 28 includes a fuel supply pump 29, a fuel filter 31, an operation switch 34, a fuel supply line 37, and the like.

  The fuel supply pump 29 is attached to the upper surface 24 </ b> A side of the bracket 24 constituting the support 16. The fuel supply pump 29 includes a pump main body 29A composed of, for example, a plunger pump, a gear pump, a trochoid pump, a vane pump, and the like, and an electric motor 29B that drives the pump main body 29A (see FIG. 4). A suction hose 37A described later is connected to the suction port 29A1 of the pump body 29A, and a discharge hose 37B described later is connected to the discharge port 29A2.

  The electric motor 29B is provided with flanges 29B1 on both left and right sides of the electric motor 29B (see FIG. 7). The flange 29B1 is provided with a bolt insertion hole (not shown) penetrating upward and downward. The fuel supply pump 29 is attached to the upper surface 24A of the bracket 24 by inserting the bolt 30 into the bolt insertion hole of the flange 29B1 and screwing into the female screw hole 24C of the bracket 24. Further, the electric motor 29B is connected to an operation switch 34 described later by an electric wire (not shown).

  Here, since the fuel supply pump 29 is mounted below the upper hinge mounting portion 23A formed on the right plate 23 of the support 16, the upper space 15A can be formed above the fuel supply pump 29. it can. Thereby, the operation | work which attaches the below-mentioned right front side surface cover 44 to the upper hinge attachment part 23A, and the operation | work which connects the below-mentioned supply hose 37C to the supply hose connection port 14B1 of the fuel tank 14 can be performed easily.

  The fuel filter 31 is attached to the lower surface 24 </ b> B side of the bracket 24 constituting the support 16. The fuel filter 31 includes a connecting portion 31A located on the upper side and a filter cover 31B located on the lower side and containing a filter element (not shown). A screw hole (not shown) is provided at a position corresponding to the bolt insertion hole 24D of the bracket 24 on the upper end side of the connection portion 31A. The fuel filter 31 is attached to the lower surface 24B side of the bracket 24 by inserting the bolt 32 through the bolt insertion hole 24D and screwing it into the female screw hole of the connection portion 31A.

  A later-described discharge hose 37B is connected to the inlet 31A1 of the connecting portion 31A, and a later-described supply hose 37C is connected to the outlet 31A2. Thereby, the fuel discharged from the fuel supply pump 29 can catch foreign matters such as dust contained in the fuel by the filter element in the filter cover 31 </ b> B, and the purified fuel can be supplied to the fuel tank 14. it can.

  Here, since the fuel filter 31 is attached above the lower hinge attachment portion 23B formed on the right plate 23 of the support 16, the lower space 15B can be formed below the fuel filter 31. . Thereby, the operation | work which attaches the below-mentioned right front side surface cover 44 to the lower hinge attachment part 23B, and the operation | work which removes the filter cover 31B below in order to replace | exchange a filter element can be performed easily.

  The clogging indicator 33 is provided so as to be connected to the connection part 31 </ b> A of the fuel filter 31. The clogging indicator 33 displays the clogging state of the filter cover 31B, and for example, a differential pressure gauge or the like is used. The clogging indicator 33 can recognize the replacement time of the filter element.

  The operation switch 34 is attached to the switch attachment plate 25 that constitutes the support 16. Specifically, the operation switch 34 is attached to the switch attachment plate 25 by screwing the bolt 35 into the female screw hole 25 </ b> A of the switch attachment plate 25. In this case, since the operation switch 34 is mounted above the lower hinge mounting portion 23B formed on the right plate 23 of the support 16, the lower space 15B can be formed below the operation switch 34. . Thereby, the operation | work which attaches the below-mentioned right front side cover 44 mentioned later to the lower side hinge attaching part 23B can be performed easily.

  The operation switch 34 is connected to a power source (both not shown) by electric wires. The operation switch 34 is connected to the electric motor 29B by an electric wire (not shown). In the operation switch 34, an ON switch 34A and an OFF switch 34B are provided on the right surface side so as to be spaced apart in the upward and downward directions. The fuel supply pump 29 can be driven by operating the on switch 34A, and the fuel supply pump 29 can be stopped by operating the off switch 34B.

  A cable 36 is connected to the operation switch 34. The cable 36 passes through a cable insertion hole 17 </ b> E formed in the front plate 17 of the support 16 at an intermediate portion, extends upward, and is connected to the cable connection port 14 </ b> B <b> 2 of the fuel tank 14. A level switch (sensor) that detects the presence or absence of fuel in the fuel tank 14 is provided on the distal end side of the cable 36 that extends from the cable connection port 14B2 into the fuel tank 14. When this level switch detects that the fuel in the fuel tank 14 is full, the operation switch 34 is automatically disconnected. Thereby, when the ON switch 34A is operated and the fuel is supplied to the fuel tank 14, the fuel is prevented from overflowing (overflowing) from the fuel tank 14.

  The oil supply pipe 37 guides the fuel discharged from the external fuel storage source to the fuel tank 14 and is constituted by, for example, a flexible pressure hose or a metallic pipe. The fuel supply line 37 includes a suction hose 37A that connects a fuel supply port 38, which will be described later, and a suction port 29A1 of the fuel supply pump 29, a discharge port 29A2 of the fuel supply pump 29, and an inflow port 31A1 of the fuel filter 31. The discharge hose 37B to be connected and the supply hose 37C for connecting the outlet 31A2 of the fuel filter 31 and the supply hose connection port 14B1 of the fuel tank 14 are configured.

  Here, as shown in FIG. 7, the fuel refueling device 28 can be assembled to the support 16 in a sub-assembled state in advance before being mounted on the excavator 1. The fuel refueling device 28 can be mounted on the excavator 1 by attaching the support 16 assembled with the fuel refueling device 28 between the lower surface plate 11B and the upper surface plate 11C of the hydraulic oil tank 11. Thereby, workability | operativity of the operation | work which assembles the fuel supply apparatus 28 to the hydraulic excavator 1 can be improved.

  The fuel supply port 38 is located between the outer side surface 11A1 of the hydraulic oil tank 11 and a right front side cover 44 described later, and is provided on the hydraulic oil tank 11 side. Specifically, the fuel supply port 38 is attached to the fuel supply port mounting bracket 13 provided on the lower surface plate 11 </ b> B of the hydraulic oil tank 11 by a bolt 39. The fuel supply port 38 is an inlet portion for supplying fuel toward the fuel supply pump 29. For example, one joint of a one-touch joint called a quick coupling is used.

  Then, by connecting the other joint of the fuel supply hose 40 connected to an external fuel storage source to the fuel supply port 38, the fuel is guided from the fuel supply device 28 to the fuel tank 14 via the fuel supply port 38. (See FIG. 5). The fuel supply port 38 is attached to the lower surface plate 11B side of the hydraulic oil tank 11 and protrudes toward the outside (left side, right side in the right direction). Thereby, the fuel supply hose 40 can be easily connected to the fuel supply port 38.

  The building cover 41 is provided on the turning frame 5 so as to cover the engine 7, the hydraulic pump 9, and the like. The building cover 41 includes an upper surface cover 42 that is positioned between the cab 10 and the counterweight 6 and covers the upper side of the engine 7 and the like, and a left side cover 43 that covers the left side surface between the cab 10 and the counterweight 6. The right front side cover 44 that covers the outer side surface 11A1 of the hydraulic oil tank 11 and the right rear side cover 48 that covers the right side surface side of the hydraulic pump 9 are configured.

  The right front side cover 44 as a side door is attached to the support 16 so that it can be opened and closed. The right front side cover 44 is formed using, for example, a steel plate material, and rises from the right side frame 5G between the right side surface of the fuel tank 14 and the right rear side cover 48, and the upper end side is an upper surface plate 11C of the hydraulic oil tank 11. Is curving towards. The right front side cover 44 is opened when the fuel supply device 28 supplies fuel to the fuel tank 14.

  Two hinges 45 and 46 are provided on the back surface 44A of the right front side cover 44 so as to be spaced apart from each other in the upward and downward directions. The upper hinge 45 positioned on the upper side is provided at a position corresponding to the upper hinge mounting portion 23A of the right plate 23 constituting the support 16, and the lower hinge 46 positioned on the lower side is mounted on the lower hinge of the right plate 23. It is provided at a position corresponding to the portion 23B. The right front side cover 44 is attached to the support 16 by bolts 47 with the upper and lower hinges 45 and 46 positioned at the upper hinge attachment portion 23A and the lower hinge attachment portion 23B, respectively.

  In this case, the fuel supply device 28 is arranged between the upper hinge 45 and the lower hinge 46. Therefore, when attaching the upper hinge 45 to the upper hinge attachment portion 23A, a tool such as a ratchet can be inserted into the upper hinge attachment portion 23A from the upper space 15A formed above the fuel supply pump 29, and the bolt 47 can be tightened. Further, when attaching the lower hinge 46 to the lower hinge attachment portion 23B, a tool such as a ratchet is inserted into the lower hinge attachment portion 23B from the lower space 15B formed below the fuel supply pump 29, and the bolt 47 is tightened. be able to. Thereby, even when the fuel refueling device 28 is assembled to the support 16, the right front side cover 44 can be attached to the support 16 without the fuel refueling device 28 being in the way, thereby improving the workability of the mounting work. can do.

  The hydraulic excavator 1 according to the present embodiment has the above-described configuration, and the operation thereof will be described next.

  An operator who has boarded the cab 10 starts the engine 7 and drives the hydraulic pump 9. In this state, the lower traveling body 2 can be moved forward or backward by operating a traveling lever or the like. On the other hand, by operating the working lever, the front device 4 can be moved up and down to perform excavation work of earth and sand.

  When fuel is replenished to the fuel tank 14, the fuel can usually be supplied from a fuel filler opening 14 </ b> A <b> 1 of the fuel tank 14 by a fuel tank. Further, in a work site where a refueling vehicle cannot enter, fuel in an external container (such as a drum can) can be supplied to the fuel tank 14 using a fuel refueling device 28 mounted on the hydraulic excavator 1.

  Specifically, first, the right front side cover 44 is opened, and the other end side of the fuel supply hose 40 whose one end side is connected to an external container is connected to the fuel supply port 38. In this case, the fuel supply port 38 is attached to the fuel supply port mounting bracket 13 provided on the lower surface plate 11 </ b> B of the hydraulic oil tank 11. Thereby, since the fuel supply port 38 is disposed at a low position that can be easily reached, the workability when the fuel supply hose 40 is connected to the fuel supply port 38 can be improved.

  Next, the fuel supply pump 29 can be driven by operating the ON switch 34A of the operation switch 34. As a result, the fuel in the external container is sucked into the fuel supply hose 40 and supplied into the fuel tank 14 from the supply hose connection port 14B1 of the fuel tank 14 via the fuel supply pump 29 and the fuel filter 31. In this case, if the filter element of the fuel filter 31 is clogged, the numerical value (pressure) of the clogging indicator 33 increases, so that the replacement time of the filter element can be recognized.

  Then, by operating the off switch 34B of the operation switch 34, the drive of the fuel supply pump 29 can be stopped. When the level switch in the fuel tank 14 connected to the cable 36 detects the upper limit (full tank) of the fuel level, the operation switch 34 is automatically turned off and the drive of the fuel supply pump 29 is stopped.

  Here, according to the prior art, the fuel refueling device is disposed in a space formed between the fuel tank and the side door that covers the outer surface of the fuel tank. In this case, there is a problem that the capacity of the fuel tank is reduced by the amount provided for the space for disposing the fuel supply device.

  Moreover, each apparatus which comprises a fuel supply apparatus is each attached to a separate bracket. Therefore, when the fuel supply device is mounted on the hydraulic excavator, it is necessary to separately attach each device of the fuel supply device to the hydraulic excavator. In this case, since each device must be assembled on the body of the hydraulic excavator, there is a problem that the assembly work is troublesome.

  Therefore, in the present embodiment, the support 16 for attaching the right front side cover 44 is provided between the hydraulic oil tank 11 and the fuel tank 14, and the fuel oil supply device 28 is formed between the hydraulic oil tank 11 and the support 16. It is configured to be attached to the support 16 in a state of being disposed in the storage space 15.

  In this case, the hydraulic oil tank 11 has an outer surface 11A1 formed in a curved shape by a cylindrical circular outer plate 11A. Thus, a storage space 15 having a substantially triangular cross section is formed between the hydraulic oil tank 11, the fuel tank 14, and the right front side cover 44. The fuel refueling device 28 is disposed in the accommodating space 15 formed at the corner of the hydraulic oil tank 11. Thereby, the fuel supply device 28 can be mounted on the excavator 1 without reducing the capacity of the fuel tank 14.

  Further, the fuel refueling device 28 is assembled in advance with the support 16 before the fuel refueling device 28 is mounted on the excavator 1, and the sub-assembled support 16 and the fuel refueling device 28 are accommodated. The structure is arranged in the space 15. Thus, after the fuel refueling device 28 is disposed in the accommodating space 15, the suction hose 37A is connected to the fuel supply port 38, the supply hose 37C is connected to the supply hose connection port 14B1 of the fuel tank 14, It is only necessary to connect an electric wire, a cable 36 or the like. Therefore, the assembly work after the fuel supply device 28 is disposed in the accommodation space 15 can be reduced as much as possible. Therefore, the work of mounting the fuel supply device 28 on the hydraulic excavator 1, the fuel supply line 37, etc. The workability of the connection work can be improved.

  The fuel supply device 28 is mounted between the upper hinge mounting portion 23A and the lower hinge mounting portion 23B of the support 16. Therefore, the upper space 15 </ b> A can be formed above the fuel supply pump 29. Accordingly, the suction hose 37A and the discharge hose 37B can be prevented from blocking the opening 17C of the support 16, so that the workability of the operation of connecting the supply hose 37C to the supply hose connection port 14B1 of the fuel tank 14 is improved. be able to.

  Further, when the upper hinge 45 of the right front side cover 44 is attached to the upper hinge attachment portion 23A of the support 16, a tool such as a ratchet is attached to the upper hinge 15A from the upper space 15A without obstructing the suction hose 37A and the discharge hose 37B. It can be inserted into the part 23A. Thereby, workability | operativity of the operation | work which attaches the right front side cover 44 to the support 16 can be improved.

  On the other hand, a lower space 15 </ b> B can be formed below the fuel supply pump 29. As a result, the filter element of the fuel filter 31 can be easily replaced with the fuel refueling device 28 disposed in the accommodation space 15.

  Further, when the lower hinge 46 of the right front side cover 44 is attached to the lower hinge attachment portion 23B of the support 16, the tool such as the ratchet can be removed from the lower space 15B without the fuel filter 31 and the operation switch 34 getting in the way. It can be inserted into the lower hinge mounting portion 23B. Thereby, workability | operativity of the operation | work which attaches the right front side cover 44 to the support 16 can be improved.

  In the above-described embodiment, the case where the outer surface 11A1 of the hydraulic oil tank 11 is formed by the cylindrical circular outer surface plate 11A and the accommodating space 15 is formed at the corner of the hydraulic oil tank 11 is taken as an example. explained. However, the present invention is not limited to this. For example, the hydraulic oil tank is formed in a polygonal shape such as a quadrangular cross section or a pentagonal cross section, and an accommodation space is provided between the outer surface of the hydraulic oil tank 11 and the right front side cover. It may be formed.

  Moreover, in embodiment mentioned above, the case where the support 16 was attached between the lower surface board 11B and the upper surface board 11C of the hydraulic oil tank 11 was mentioned as an example, and was demonstrated. However, the present invention is not limited to this. For example, the lower end side of the support may be mounted on the turning frame.

  In the above-described embodiment, the case where the fuel supply port 38 is attached to the fuel supply port attachment bracket 13 provided on the lower surface plate 11B of the hydraulic oil tank 11 has been described as an example. However, the present invention is not limited to this. For example, the fuel supply port may be provided on the right extending beam or the right side frame.

  In the present embodiment, the crawler excavator 1 is described as an example of the construction machine. However, the present invention is not limited to this, and may be applied to, for example, a wheel-type hydraulic excavator. Besides, it can be widely applied to other construction machines such as hydraulic cranes.

  Furthermore, in the present embodiment, the fuel refueling device 28 has been described as a fuel supply pump 29 and a fuel filter 31 that are configured separately. However, even if the fuel supply pump has a built-in fuel filter. Good. Further, when the filtration performance is not required for the fuel filter, the fuel filter 31 may be omitted. Furthermore, the fuel supply hose itself connected to the fuel supply port 38 may have a fuel filter.

1 Excavator (construction machine)
DESCRIPTION OF SYMBOLS 2 Lower traveling body 3 Upper turning body 4 Front apparatus 4A Boom 4A1 Foot part 5 Turning frame 6 Counterweight 7 Engine 10 Cab 11 Hydraulic oil tank 11A Circular outer surface plate 11A1 Outer side surface 11B Lower surface plate 11C Upper surface plate 14 Fuel tank 15 Housing space 16 Support 28 Fuel refueling device 38 Fuel supply port 44 Right front side cover (side door)
45 Upper hinge 46 Lower hinge

Claims (4)

A self-propelled lower traveling body, an upper revolving body mounted on the lower traveling body so as to be capable of swiveling, and a front device provided on the upper revolving body so as to be able to move up and down,
The upper swing body is
A revolving frame in which a support structure for attaching to the lower traveling body is formed, and a foot portion of the front device is attached to an intermediate portion in the left and right directions on the front side of the support structure;
A counterweight provided at the rear of the swivel frame to balance the weight with the front device;
An engine mounted on the front side of the counterweight in a horizontally placed state extending in the left and right directions at the rear of the revolving frame;
A cab provided on the front side of the engine and on one side of the left and right directions across the foot portion of the front device;
A hydraulic oil tank that is provided on the front side of the engine and on the other side in the left and right directions across the foot portion of the front device, and stores hydraulic oil;
In a construction machine comprising a fuel tank provided on the swivel frame adjacent to the front side of the hydraulic oil tank and storing fuel,
Between the hydraulic oil tank and the fuel tank, a door mounting support is provided on the outer surface side of the hydraulic oil tank,
The support is provided with a side door that covers the outer surface of the hydraulic oil tank,
In a housing space formed between the hydraulic oil tank and the support, a fuel oil supply device for supplying fuel stored in an external fuel storage source to the fuel tank is disposed,
The construction machine characterized in that the fuel supply device is configured to be attached to the support. The hydraulic oil tank is formed by a cylindrical circular outer surface plate forming the outer surface, a lower surface plate closing the lower surface of the circular outer surface plate, and an upper surface plate closing the upper surface of the circular outer surface plate,
The construction machine according to claim 1, wherein the housing space is formed between the circular outer surface plate of the hydraulic oil tank and the side door. The support is provided with a hinge for attaching the side door spaced apart in the upward and downward directions,
The construction machine according to claim 1 or 2, wherein the fuel refueling device is attached between the upper and lower hinges.   The fuel supply port for supplying fuel to the fuel supply device is located between the outer surface of the hydraulic oil tank and the side door, and is provided on the hydraulic oil tank side. The construction machine according to 3.

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