JP2002061224A - Slewing type construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the assembling workability and productivity by installing a hydraulic fluid tank, a fuel tank, etc., separately from the main frame. SOLUTION: A hydraulic fluid tank 45 and a fuel tank 52 are sub-assembled on a tank bracket 52 thereby forming a tank sub-assembly body 33, and the tank bracket 34 of the tank sub-assembly body 33 is assembled to the slewing frame 14 forming the main assembly body in the configuration. Thus, the sub- assembling work for assembling the hydraulic fluid tank 45, the fuel tank 52 or the like to the tank bracket 34 can be performed in a wide working area, thereby improving the assembling workability. Moreover the assembling work to the slewing frame 14 can be limited only to the fixation of the tank bracket 34 with bolts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a revolving construction machine such as a hydraulic excavator suitable for use in excavating earth and sand, and more particularly, to a revolving type construction machine in which the revolving radius of an upper revolving unit is reduced. Related to construction machinery.

[0002]

2. Description of the Related Art In general, a hydraulic shovel as a revolving construction machine generally includes a lower traveling body, an upper revolving body rotatably mounted on the lower traveling body, and a vertically movable upper revolving body. And a working device including a boom, an arm, and a bucket provided in the work machine.

[0003] The upper revolving superstructure is mounted on a revolving frame, an engine mounted on the rear side of the revolving frame and mounted horizontally to extend leftward and rightward, and drives a hydraulic pump. A driver's seat disposed on the front side, a hydraulic oil tank disposed on the right side of the driver's seat and in front of the engine and storing hydraulic oil supplied to a lower traveling body, a working device, and the like, and a vicinity of the hydraulic oil tank And a fuel tank for storing fuel supplied to the engine.

On the other hand, there is a small-sized excavator called a mini-excavator as an excavator. This type of excavator is disclosed in Japanese Utility Model Laid-Open No. 5-73049 and Japanese Unexamined Patent Publication No. 9-15-15.
No. 1483, and the like. In the small hydraulic excavator, the upper revolving unit is formed to have a substantially circular shape and the diameter thereof is reduced so that the turning radius of the upper revolving unit is reduced to a small value. For this reason, in a small-sized hydraulic excavator, the arrangement, shape, and the like of an engine, a tank, and the like disposed on the revolving frame are devised so that each member can be disposed even on a narrow revolving frame.

Here, the hydraulic excavator disclosed in Japanese Utility Model Laid-Open No. 5-73049 is shown in which both the hydraulic oil tank and the fuel tank are formed by sheet metal working using a metal material.

In the hydraulic excavator disclosed in Japanese Patent Application Laid-Open No. 9-151483, a first mounting base and a second mounting base are provided on a revolving frame, and a steel hydraulic oil tank is screwed to the first mounting base. With the resin fuel tank mounted on the second mount, the fuel tank is mounted on the hydraulic oil tank by a tightening band.

[0007]

In the hydraulic excavator disclosed in Japanese Utility Model Laid-Open No. 5-73049, the hydraulic oil tank and the fuel tank are formed by sheet metal working, so that it takes time to manufacture the tank. In addition, it is very difficult to make the shape of the tank complicated. For this reason, the tank shape cannot be adjusted according to the circular shape of the upper swing body, and there is a problem that the capacity of each tank is reduced.

Further, in the hydraulic shovel disclosed in Japanese Patent Application Laid-Open No. 9-151483, since the first mounting base and the second mounting base which are provided integrally with the revolving frame are provided integrally, the hydraulic oil tank and the fuel tank are not provided. Are sequentially mounted on the turning frame. However, in a small-sized hydraulic excavator, a hydraulic oil tank, a fuel tank, and the like mounted on the upper revolving unit are arranged so as to reduce the gap in order to make the upper revolving unit smaller. For this reason, when installing the hydraulic oil tank, the fuel tank, and parts attached to these tanks, there is no space for inserting a hand, a bolt is passed through a bolt insertion hole, a nut is screwed to the bolt, or It is also difficult to move a tool such as a wrench for fastening.

Accordingly, the workability when assembling the tank and the like is reduced, and the hydraulic oil tank, the fuel tank, and the like must be reduced in size in order to secure a working space during the assembling work. There is a problem that the capacity of each tank is reduced.

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 provide a hydraulic oil tank, a fuel tank, and the like separately from a main frame, thereby improving workability. It is an object of the present invention to provide a swing type construction machine capable of improving productivity.

[0011]

A revolving construction machine according to the present invention comprises: a lower traveling body; an upper revolving body rotatably mounted on the lower traveling body; The upper revolving superstructure comprises a revolving frame, an engine mounted on the revolving frame, a hydraulic oil tank for storing hydraulic oil supplied to the working device, and a lower traveling body. And a fuel tank provided adjacent to the hydraulic oil tank and storing fuel supplied to the engine.

Then, in order to solve the above-mentioned problem,
The feature of the configuration adopted by the invention of claim 1 is that the hydraulic oil tank and the fuel tank are sub-assembled on the bracket to form a tank sub-assembly, and the bracket of the tank sub-assembly is assembled to the turning frame. And that

[0013] With this configuration, before the bracket is mounted on the revolving frame, the bracket is arranged in a wide work area, and in this state, the hydraulic oil tank and the fuel tank are sub-assembled on the bracket. For example, a bolt used for assembling a hydraulic oil tank or a fuel tank is passed through a bolt insertion hole, a nut is screwed into the bolt, and a tool such as a wrench for tightening is easily moved. Can be. Then, by attaching the bracket of the tank sub-assembly to the turning frame, the hydraulic oil tank and the fuel tank can be mounted on the turning frame.

According to the second aspect of the present invention, the hydraulic oil tank is formed using a metal material, and the fuel tank is formed using a resin material.

With this configuration, the hydraulic oil tank has an increased strength, so that a pressure can be applied to the inside of the hydraulic oil tank to smoothly supply the hydraulic oil. Further, the fuel tank can be easily formed into a complicated shape by resin molding, and the capacity of the fuel tank can be increased.

According to the third aspect of the present invention, a hydraulic oil tank is fixedly mounted on the bracket, and a fuel tank is mounted on the bracket adjacent to the hydraulic oil tank, and the fuel tank comprises the bracket and the hydraulic oil tank. And a structure that is fixed by using a fastener.

With this configuration, for example, even when the fuel tank is formed of a resin material, the bracket and the operating member fixedly attached to the bracket can be formed without forming a screw hole or the like in the fuel tank. The fuel tank can be fixed by a fastener using an oil tank.

According to the present invention, a fuel filter is mounted on the bracket, a fuel hose is connected between the fuel tank and the fuel filter, and the fuel filter is provided with a fuel supply hose connected to the engine. The fuel tank is provided with a fuel return hose connected to the engine.

With such a structure, the fuel filter, the fuel hose, the fuel supply hose, and the fuel return hose can be assembled together with the bracket, the hydraulic oil tank, and the fuel tank as a part of the tank sub-assembly. .

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A hydraulic shovel will be described as an example of a swing type construction machine according to an embodiment of the present invention and will be described in detail with reference to FIGS.

Reference numeral 1 denotes a lower traveling body of a hydraulic excavator, and 2 denotes an upper revolving body mounted on the lower traveling body 1 via a revolving device 3 so as to be pivotable. An earth removal plate device 4 for performing an excavating operation, an earth discharging operation and the like is provided, and a work device 5 for performing an excavation operation for earth and sand and the like is provided in front of the upper rotating body 2.

The working device 5 has a lower boom 6 attached to a vertical plate 16, 17 of a revolving frame 14, which will be described later, so as to be able to move up and down, and is capable of swinging left and right at the tip of the lower boom 6. An upper boom 7 attached thereto, an arm retainer 8 attached to the distal end of the upper boom 7 so as to swing leftward and rightward, an arm 9 attached to the arm retainer 8 so as to be able to move up and down, and the arm 9 And a bucket 10 rotatably attached to the distal end of the head.

A link rod (not shown) is provided between the distal end of the lower boom 6 and the arm retainer 8 so as to be rotatable left and right. , Upper boom 7, arm retainer 8
The arm 9 (arm retainer 8) is always kept parallel to the lower boom 6.

Further, the turning frame 14 and the lower boom 6
, A boom cylinder 11 is provided, an arm cylinder 12 is provided between the arm retainer 8 and the arm 9, and a bucket cylinder 13 is provided between the arm 9 and the bucket 10. An offset cylinder (not shown) is provided between the lower boom 6 and the upper boom 7.
The arm 9 can be moved in the left and right directions with respect to the lower boom 6 by expanding and contracting the offset cylinder, for example, when performing a side ditching operation.

Next, the upper swing body 2 has a substantially circular shape and a small diameter so that the swing radius is small when it swings. The upper swing body 2 includes a swing frame 14, a counterweight 18, an engine 19, a control valve group 24, an outer cover 25, a driver seat 30,
It is roughly constituted by the tank sub-assembly 33 and the like.

Reference numeral 14 denotes a revolving frame of the upper revolving unit 2. As shown in FIGS. 2 to 4, the revolving frame 14 is provided with a flat bottom plate 15 and is erected upward from the bottom plate 15 and extends in the front-rear direction. And left and right vertical plates 16 and 17. On the bottom plate 15, a control valve group 24, which will be described later, is disposed on the left side of the vertical plate 16.
A tank sub-assembly 33, which will be described later, is disposed on the right side of 7.

Numeral 18 denotes a counterweight attached to the rear end of the turning frame 14.
Is used to balance the weight with the working device 5 and is formed in an arc shape corresponding to the turning radius.

Reference numeral 19 denotes an engine mounted on the revolving frame 14. The engine 19 is disposed on the rear side of the revolving frame 14 and in front of the counterweight 18 in a horizontal state extending leftward and rightward. I have. A cooling fan 20 is provided on the right side of the engine 19, and a hydraulic pump 21 is mounted on the left side. The engine 19 is connected to a fuel tank 52 via a fuel supply hose 60, a fuel return hose 61, and the like, which will be described later.

Reference numeral 22 denotes a cooling fan 2 on the right side of the engine 19.
0, a radiator disposed near the radiator 22.
Is for cooling the engine cooling water. Also, 23
Is an oil cooler arranged adjacent to the left side (engine side) of the radiator 22, and the oil cooler 23 cools hydraulic oil.

Reference numeral 24 denotes a control valve group located on the left side of the revolving frame 14 and in front of the hydraulic pump 21. The control valve group 24 is composed of a plurality of control valves composed of hydraulic pilot type switching valves. It is configured.

Reference numeral 25 denotes an outer cover (shown in FIG. 1) of the upper swing body 2.
Engine front cover (not shown) that covers the front side from above 9
, A tank cover 26 covering the hydraulic oil tank 45, the fuel tank 52, etc., a left cover (not shown) covering the hydraulic pump 21, etc., and a bonnet 27 covering the rear side of the engine 19. Reference numerals 28 and 29 denote left and right skirt covers which are located below the outer cover 25 and cover the periphery of the revolving frame 14.

Numeral 30 denotes a driver's seat (shown in FIG. 1) provided on the front cover of the engine of the outer cover 25.
A lever stand 31 having operation levers 31A, 31A,... The upper part of the driver's seat 30 is covered with a canopy 32.

Next, the tank sub-assembly 33 mounted on the bottom plate 15 of the revolving frame 14 will be described. As shown in FIGS. 5 to 9, the tank sub-assembly 33 is disposed on the right side of the vertical plate 17 in front of the engine 19. The tank sub-assembly 33 includes a tank bracket 34, a hydraulic oil tank 45, a fuel tank 52, tank fixing band 56,
Fuel filter 58, fuel hose 59, fuel supply hose 6
0, which is roughly constituted by a fuel return hose 61.

Numeral 34 denotes a tank bracket serving as a mounting base for the tank sub-assembly 33.
Is formed by cutting a single metal plate into a predetermined shape and bending it appropriately as shown in FIG. The tank bracket 34 includes a hydraulic oil tank mounting plate 35 to which the hydraulic oil tank 45 is mounted on the rear side,
A fuel tank mounting plate portion 36 extending forward from the hydraulic oil tank mounting plate portion 35 and mounting the fuel tank 52 thereon; The side leg portion 37 and the fuel tank mounting plate portion 36
And a side leg portion 38 which is bent downward from the right side and extends.

Here, the hydraulic oil tank mounting plate 35 has
A bolt 51 described below for fixing the hydraulic oil tank 45
Are formed, and a bolt insertion groove 35B through which a later-described bolt 41 for fixing the tank bracket 34 to a bracket (not shown) on the revolving frame 14 side is formed. ing. The fuel tank mounting plate 36 has bolt insertion holes 36A, 36A,... Through which bolts 43 to be described later for fixing a locking bracket 42 to be described later are inserted.
A bolt insertion groove 36B into which a bolt 41 for fixing to a bracket (not shown) on the fourth side is inserted is formed. Further, nuts 39, 39, 39 to which bolts 41 for fixing the tank bracket 34 to the bottom plate 15 of the revolving frame 14 are screwed are fixed to the rear leg portions 37, 38 by welding means. A mounting seat 40 which is located on the front side and on which a fuel filter 58 to be described later is mounted is provided on the portion 38.
Is fixed.

The tank bracket 34 has a bolt insertion groove 35B of the hydraulic oil tank mounting plate 35 and a bolt insertion groove of the fuel tank mounting plate 36 in a state where the hydraulic oil tank 45, the fuel tank 52 and the like are assembled. Bolt 4 through 36B
1 and 41 are screwed to the bracket on the turning frame 14 side,
The bolts 41 are screwed to the nuts 39 from below the bottom plate 15 via the bottom plate 15 to be attached to the turning frame 14.

Reference numeral 42 denotes a locking bracket provided on the front side of the fuel tank mounting plate portion 36.
2 is formed by bending a rectangular plate material into a U-shape. Then, a locking hook 56B of a tank fixing band 56 described later is locked on the upper side of the locking bracket 42. As shown in FIG. 9, the lower side of the locking bracket 42 is attached to the fuel tank mounting plate 36 by bolts 43, 43 and nuts 44, 44.

Reference numeral 45 denotes a hydraulic oil tank for storing hydraulic oil supplied to the cylinders 11, 12, 13 and the like of the lower traveling body 1 and the working device 5, and the hydraulic oil tank 45 is used for mounting the hydraulic oil tank on the tank bracket 34. It is mounted on a plate 35. The hydraulic oil tank 45 is applied with a relatively low pressure by air pressure so that hydraulic oil can be positively supplied to the hydraulic pump 21. For this reason, the hydraulic oil tank 45 is configured using a metal material such as an iron plate. The hydraulic oil tank 45 includes a flat front plate 45A, a rear plate 45B, a left side plate 45C, and a right side plate 4
5D, formed by a top plate 45E and a bottom plate 45F,
It is an almost rectangular parallelepiped container vertically set up and down.

Here, the right side plate 45 of the hydraulic oil tank 45
D has a plurality of hose connection ports 46, 46,... To which hoses (not shown) for returning hydraulic oil (pilot oil) from the control valve group 24 are connected. A level gauge 47 for displaying the refueling amount is provided. The upper surface plate 45E includes a return path control valve 48 that controls a flow path of the hydraulic oil returned to the hydraulic oil tank 45 according to the temperature, a lid 49 that closes an oil supply port for supplying the hydraulic oil, A screwing bracket 50 is provided on the front side, to which a male screw portion 56C of a tank fixing band 56 described later is attached.

When the hydraulic oil tank 45 is placed on the hydraulic oil tank mounting plate 35, a plurality of bolts are inserted from below into the bolt insertion holes 35A of the hydraulic oil tank mounting plate 35. Are fixedly attached to the tank bracket 34 by screwing 51, 51,... To a screw seat on the bottom plate 45F side.

Reference numeral 52 denotes a fuel tank for storing fuel supplied to the engine 19. The fuel tank 52 is mounted on the fuel tank mounting plate 36 of the tank bracket 34 adjacent to the front side of the hydraulic oil tank 45. ing. The fuel tank 52 stores fuel in a non-pressurized state.
It is molded using a resin material. Here, the fuel tank 52 includes a front surface portion 52A, a rear surface portion 52B, and a left side surface portion 52.
C, right side 52D, top 52E and bottom 52F
The space between the front part 52A and the right side part 52D is an arc part 52G corresponding to the shape of the upper swing body 2 formed in an arc shape. Also, from the front part 52A to the top part 5
2E, a positioning groove 5 for positioning a band portion 56A of a tank fixing band 56 described later in the left and right directions.
2H is recessed.

On the other hand, a lid 53 for closing a fuel supply port for supplying fuel is attached to the upper surface 52E of the fuel tank 52, and between the front surface 52A and the upper surface 52E,
A level gauge 54 is provided for indicating that the tank is almost full when refueling. A filler 55 for supplying the fuel in the fuel tank 52 to the engine 19 is attached to a lower side of the fuel tank 52. The fuel tank 52 is mounted on the tank bracket 34.
Tank fixing band 5 described below between the
6.

Reference numeral 56 denotes a tank fixing band serving as a fastener for fixing the fuel tank 52.
Reference numeral 6 denotes a band portion 56A extending from the front side to the upper side of the fuel tank 52 so as to extend from the tank bracket 34 side to the hydraulic oil tank 45 side, and is provided at the lower end side of the band portion 56A and bent in a J-shape. Locking hook 56 formed
B and a male screw portion 56C provided on the upper end side of the band portion 56A. Then, the tank fixing band 56 locks the locking hook 56B to the locking bracket 42 provided on the tank bracket 34, arranges the band portion 56A along the positioning groove 52H of the fuel tank 52, and connects the male screw portion 56C. With the nuts 57 and 57 screwed into the male screw portion 56C in a state of being inserted into the screw bracket 50 provided on the hydraulic oil tank 45, the fuel tank 52 is pressed and fixed to the tank bracket 34 and the hydraulic oil tank 45. can do.

Reference numeral 58 denotes a mounting seat 40 of the tank bracket 34.
The fuel filter attached to the fuel filter 58
Is for removing foreign substances in the fuel supplied from the fuel tank 52 to the engine 19.

A fuel hose 59 connects the filler 55 attached to the fuel tank 52 and the fuel filter 58,
Reference numeral 60 denotes a fuel supply hose connected to the fuel filter 58, and the fuel supply hose 60
And is connected to the engine 19. Reference numeral 61 denotes a filler 55 of the fuel tank 52.
The fuel return hose 61 connected to the
Is for returning fuel from the engine 19, and is connected to the engine 19 like the fuel supply hose 60.

The hydraulic shovel according to the present embodiment has the above-described configuration. The operator sits on the driver's seat 30 and operates each operating lever 3 provided on the lever stand 31.
By operating 1A or the like, the lower traveling body 1 can be moved and moved, or the work apparatus 5 can be moved up and down to perform excavation work on earth and sand.

Next, the procedure for assembling the tank sub-assembly 33 used in this embodiment will be described.

First, the tank bracket 34 is arranged in a large work place without any obstacles around. Then, the hydraulic oil tank 45 is placed on the hydraulic oil tank mounting plate 35 of the tank bracket 34, and the hydraulic oil tank 45 is
Is fixedly attached to the hydraulic oil tank attachment plate 35. Next, the fuel tank 52 is mounted on the fuel tank mounting plate 36 of the tank bracket 34, and the fuel tank 52 is fixed by the tank fixing band 56. Further, a fuel filter 58 is mounted on the mounting seat 40 of the tank bracket 34, and a fuel hose 59, a fuel supply hose 60, and a fuel return hose 61 are connected thereto. This tank sub-assembly 3
At the time of the assembling operation 3, for example, the bolt 51 can be passed through the bolt insertion hole 35A, or the bolt 51 can be easily tightened with a tool such as a spanner.

After the tank sub-assembly 33 is sub-assembled in this manner, the tank sub-assembly 33 is placed on the right side of the vertical plate 17 of the revolving frame 14 constituting the main assembly, and the tank bracket 34 is bolted to each bolt. By fixing the tank sub-assembly 33 to the revolving frame 14 by fixing the tank sub-assembly 33 to the revolving frame 14 by using 41.

Further, when the tank sub-assembly 33 is assembled to the turning frame 14, the fuel supply hose 60 and the fuel return hose 61 are connected to the engine 19. Further, a hydraulic oil supply hose 62 connected to the hydraulic pump 21 is connected to the bottom plate 45F of the hydraulic oil tank 45, and a return path control valve 48 of the hydraulic oil tank 45 is connected to the hydraulic oil return connected to the control valve group 24. The hose 63 and the hydraulic oil return hose 64 connected to the oil cooler 23 are connected, and each hose connection port 46 is connected to a hose connected to the control valve group 24. As a result, the tank sub-assembly 33, that is, the hydraulic oil tank 45, the fuel tank 52, and the like can be assembled to the turning frame 14.

As described above, according to the present embodiment, the hydraulic oil tank 45 and the fuel tank 52 are connected to the tank bracket 3.
4 to form a tank sub-assembly 33 by sub-assembly,
The tank bracket 34 of the tank sub-assembly 33 is attached to the revolving frame 14 which forms the main assembly. Therefore, the sub-assembly work for assembling the hydraulic oil tank 45, the fuel tank 52, and the like to the tank bracket 34,
The work can be performed in a wide work place, and the work of assembling to the revolving frame 14 is only the work of bolting the tank bracket 34. Therefore, these work of assembling can be easily performed and the productivity is improved. can do.

Moreover, the hydraulic oil tank 45 and the fuel tank 5
The mounting work of the parts related to 2, for example, the fuel filter 58, the various hoses 59, 60, 61, etc., is also performed.
It can be performed in a wide place other than above, and the workability of the assembling work can be improved. Further, since it is not necessary to reduce the size of the hydraulic oil tank 45 and the fuel tank 52 in order to secure a work space, the capacity of each of the tanks 45 and 52 can be increased.

Further, since the hydraulic oil tank 45 is formed by using a metal material, the strength of the hydraulic oil tank 45 can be increased, and a pressure for smooth supply of the hydraulic oil is applied to the inside thereof. be able to. Furthermore, the fuel tank 5
Since 2 is formed using a resin material, the fuel tank 52 can be easily formed into a complicated shape by resin molding, and the capacity of the fuel tank 52 can be increased.

On the other hand, a hydraulic oil tank 45 is bolted to the tank bracket 34, and a fuel tank 52 is mounted on the tank bracket 34 adjacent to the hydraulic oil tank 45. Since the fuel tank 52 is fixed to the hydraulic oil tank 45 using the tank fixing band 56, even when the fuel tank 52 is formed using a resin material, it is necessary to form a screw hole or the like in the fuel tank 52. Instead, the tank bracket 34 and the hydraulic oil tank 45 can be used to securely fix the fuel tank 52 by the tank fixing band 56.

In the embodiment, the tank fixing band 56 is configured such that the locking hook 56B provided at one end of the band portion 56A is connected to the locking bracket 42 of the tank bracket 34.
And a male screw portion 56C provided on the other end side of the band portion 56A is screwed into the screw bracket 50 of the hydraulic oil tank 45.
However, the present invention is not limited to this, and the tank fixing band 56 locks the locking hook 56B to the screwing bracket 50 of the hydraulic oil tank 45, and connects the male screw portion 56C to the tank. A configuration in which the bracket 34 is screwed to the locking bracket 42 may be employed.

The tank fixing band 56 is provided with the male screw portion 56C as a screw portion, and the nut 57 is screwed to the male screw portion 56C and fixed. However, the nut is fixed to the band portion 56A. A bolt inserted into the screw bracket 50 may be screwed to the nut.

Further, in the embodiment, the offset type working device 5 in which the arm 9 moves in parallel with the lower boom 6.
However, the present invention is not limited to this. For example, a swing post that rotates left and right is provided at the front of a turning frame, and a working device is mounted on the swing post. The present invention may be applied to an attached swing type hydraulic excavator.

Further, in the embodiment, the case where the present invention is applied to a hydraulic excavator provided with a canopy 32 for covering the upper side of the driver's seat 30 has been described as an example.
May be applied to a hydraulic excavator provided with a cab box covering the periphery of the vehicle.

Further, in the embodiment, the hydraulic shovel has been described as an example of the swing type construction machine. However, the present invention is not limited to this, and may be applied to other swing type construction machines such as a hydraulic crane. Can be.

[0060]

As described above in detail, according to the first aspect of the present invention, the hydraulic oil tank and the fuel tank are sub-assembled on the bracket to form a tank sub-assembly, and the bracket of the tank sub-assembly is formed. Is mounted on the revolving frame.Before mounting the bracket on the revolving frame, the bracket is arranged in a wide work area, and in this state, the hydraulic oil tank and the fuel tank can be sub-assembled on the bracket. it can. Therefore, at the time of assembling work, for example, a bolt used for assembling a hydraulic oil tank or a fuel tank is passed through a bolt insertion hole, a nut is screwed to the bolt, or a tool such as a wrench for tightening is moved. Can be easily performed. In addition, since the work of assembling to the revolving frame only involves mounting the bracket, these mounting work can be easily performed, and the productivity can be improved. In addition, since it is not necessary to reduce the size of the hydraulic oil tank and the fuel tank in order to secure a work space, the capacity of each tank can be increased.

According to the second aspect of the present invention, since the hydraulic oil tank is formed using a metal material and the fuel tank is formed using a resin material, the strength of the hydraulic oil tank can be increased. Pressure for smoothing the supply of hydraulic oil can be applied to the inside. Further, since the fuel tank is formed using a resin material, the fuel tank can be easily formed into a complicated shape by resin molding, and the capacity of the fuel tank can be increased.

According to the third aspect of the present invention, a hydraulic oil tank is fixedly attached to the bracket, and a fuel tank is mounted on the bracket adjacent to the hydraulic oil tank, and the fuel tank is connected to the bracket by the hydraulic oil tank. Since it is configured to be fixed using a fastener between the tank and, for example, even if the fuel tank is formed using a resin material, without forming a screw hole or the like in the fuel tank, the bracket and the bracket The fuel tank can be securely fixed by the fastener using the hydraulic oil tank fixedly attached.

According to the invention of claim 4, a fuel filter is mounted on the bracket, a fuel hose is connected between the fuel tank and the fuel filter, and a fuel supply hose connected to the engine is connected to the fuel filter. The fuel tank is equipped with a fuel return hose connected to the engine, so the fuel filter, fuel hose, fuel supply hose, and fuel return hose are assembled together with the bracket, hydraulic oil tank, and fuel tank into a tank sub-assembly. Assembling as a part of the body can improve workability during the assembling operation.

[Brief description of the drawings]

FIG. 1 is a front view showing a hydraulic shovel applied to an embodiment of the present invention.

FIG. 2 is an enlarged plan view showing an upper swing body in FIG. 1;

FIG. 3 is a front view of the upper revolving superstructure shown in FIG. 2 as viewed from the direction of arrows III-III.

FIG. 4 is a right side view of the upper swing body shown in FIG. 2 as viewed from the direction of arrows IV-IV.

FIG. 5 is a front view showing the tank sub-assembly alone.

FIG. 6 is a plan view showing the tank sub-assembly alone.

FIG. 7 is a right side view showing the tank sub-assembly alone.

FIG. 8 is an external perspective view showing the bracket of the tank sub-assembly alone.

FIG. 9 is an exploded perspective view showing the bracket, hydraulic oil tank, fuel tank, and tank fixing band of the tank sub-assembly in an exploded state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Upper revolving superstructure 5 Working device 14 Revolving frame 19 Engine 33 Tank sub-assembly 34 Tank bracket 45 Hydraulic oil tank 52 Fuel tank 56 Tank fixing band (fastener) 58 Fuel filter 59 Fuel hose 60 Fuel supply hose 61 Fuel return hose

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F02M 37/22 B60K 15/02 A (72) Inventor Makoto Kuno 1-Sasagaoka, Mizuguchi-machi, Koka-gun, Shiga Prefecture 2 F-term in Hitachi Construction Machinery Tierra Shiga Plant (reference) 2D015 CA00 3D038 CA00 CA04 CA14 CB09 CC07 CC17 CC20 CD00 CD10

Claims (4)

[Claims] 1. An undercarriage, an upper revolving body rotatably mounted on the lower traveling body, and a working device provided at a front portion of the upper revolving body so as to be capable of elevating and lowering, The revolving unit includes a revolving frame, an engine mounted on the revolving frame, the working device, a hydraulic oil tank for storing hydraulic oil supplied to the lower traveling unit, and a revolving body provided adjacent to the hydraulic oil tank. A revolving construction machine comprising a fuel tank for storing fuel supplied to an engine, wherein the hydraulic oil tank and the fuel tank are sub-assembled on a bracket to form a tank sub-assembly. A swingable construction machine, wherein the bracket is mounted on the swing frame. 2. The turning type construction machine according to claim 1, wherein the hydraulic oil tank is formed using a metal material, and the fuel tank is formed using a resin material. 3. A hydraulic oil tank is fixedly mounted on the bracket, and the fuel tank is mounted on the bracket adjacent to the hydraulic oil tank, and the fuel tank is disposed between the bracket and the hydraulic oil tank. The turning type construction machine according to claim 1, wherein the turning type construction machine is configured to be fixed using a fastener. 4. A fuel filter is mounted on the bracket, a fuel hose is connected between the fuel tank and the fuel filter, and a fuel supply hose connected to the engine is provided on the fuel filter. 4. The swiveling construction machine according to claim 1, wherein the tank is provided with a fuel return hose connected to the engine.