JP2002188175A - Revolving construction equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the durability and use an inexpensive mounting flange by reducing a load acting on a connection part of metallic pipes. SOLUTION: A clamp member 37 is provided in a leg part 30B of a pedestal 30 loading a control valve 31, and a halfway section of the long metallic pipe 34A connected with the control valve 31 via outer periphery of the pedestal 30 among hydraulic pipes 34 is fixed to the pedestal 30 by the clamp member 37. Consequently, even when vibration acts on the metallic pipe 34A, the clamp member 37 can prevent a load generated by the vibration from acting on a split flange 35 fixing an end part of the metallic pipe 34A. Moreover, the inexpensive and general-purpose split flange 35 can be used to fix the metallic pipe 34A, thereby reducing cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swing type construction machine such as a hydraulic excavator which is suitably used for excavating earth and sand.

[0002]

2. Description of the Related Art In general, a swing type construction machine such as a hydraulic shovel has a lower traveling structure, an upper revolving structure mounted on the lower traveling structure so as to be capable of pivoting, and an up-and-down movement on the front side of the upper revolving structure. And a working device provided.

The upper revolving structure includes a revolving frame in which a working device is mounted at a central portion on the front side, a cab provided at a left position on the front side of the revolving frame, and a revolving frame positioned on the rear side of the working device. Engine mounted on the frame,
A hydraulic pump provided on the engine, a counterweight located at the rear side of the engine and attached to the rear end of the revolving frame, and a control mounted on the revolving frame and connected to a plurality of control valves and the like. It is generally constituted by a valve and a hydraulic pipe connecting the control valve and a hydraulic pump.

Here, the hydraulic excavator has a length from the center of rotation of the upper revolving unit to a rear end (counter weight) so that the work can be performed while turning at a narrow work site such as an urban area. There is an excavator configured as a so-called small-swing hydraulic excavator in which the upper revolving unit is reduced in size and the turning radius is reduced.

[0005] In this small turning type hydraulic excavator, as a means for shortening the length from the turning center to the rear end of the upper turning body, for example, the engine is disposed in a horizontal state extending leftward and rightward. are doing. In addition, by reducing the length from the pivot center to the rear end, the space on the rear side of the upper revolving structure is reduced, so the control valve is installed from the rear side of the revolving frame to the front right position. Have been moved.

The control valve is connected to a hydraulic pump, a traveling hydraulic motor of the lower traveling body, a turning hydraulic motor of a turning device, a hydraulic actuator of a working device, and the like via hydraulic piping. The control valve operates by branching and supplying the pressure oil supplied from the hydraulic pump to the lower traveling body, the working device, and the like in accordance with the operation of the operation lever and the like in the cab. .

[0007] Hydraulic piping includes a flexible hose piping and a rigid metal piping. Although the hose pipe can be freely bent in any direction, it cannot cope with sharp bending, and the larger the hose diameter, the larger the minimum bending radius of the hose pipe. On the other hand, metal pipes require processing for connection in advance, but can obtain a smaller bending radius than hose pipes, and at the same time use an L-shaped joint called an elbow to form a right angle. It is also possible to bend it.

[0008] Since the hydraulic oil to be supplied to each hydraulic motor and hydraulic actuator must be collectively circulated between the hydraulic pump and the control valve, the flow rate of the hydraulic oil becomes very large. For this reason, when a hose pipe is used, its diameter becomes large. Therefore, when hose piping is used near the control valve,
Because the minimum bending dimension of large diameter hose piping is too large,
It cannot be connected to the control valve in a small space. For this reason, metal piping is used in a portion of the hydraulic piping that reaches the turning frame from the control valve. The hydraulic piping is fixedly supported on the turning frame by clamps at a plurality of locations in the length direction.

[0009]

In the above-mentioned prior art, one of the metal pipes constituting the hydraulic pipe is connected to the control valve via a mounting flange, and the other is connected to the revolving frame using a clamp. Fixedly supported.

Here, the hydraulic excavator is provided with many hydraulic devices such as a hydraulic motor for traveling, a hydraulic motor for turning, and a hydraulic actuator for a working device. Therefore, a plurality of hydraulic pumps are provided so that a large amount of hydraulic oil can be supplied. Is provided. Further, for example, two hydraulic pipes connecting the two hydraulic pumps and the control valve extend forward and rearward near the right end of the turning frame in order to avoid a hydraulic oil tank, a fuel tank, and the like located in the middle. After that, it is divided into left and right directions and connected to the control valve.

Therefore, of the two metal pipes connected to the control valve, the metal pipe connected to the right side (outside) of the control valve extends near the right end and is bent so as to rise upward. Just be able to connect to the control valve. On the other hand, the metal pipe connected to the left side (inside) of the control valve needs to be bent inward so as to go around the outer periphery of the pedestal, and then rise up to be connected to the control valve.

For this reason, the length of the metal pipe located on the left side from the position where it is fixed to the revolving frame by the clamp to the connection to the control valve is longer than the outer metal pipe. As a result, the inner metal pipe is liable to be vibrated, so that there is a problem that a mounting flange or the like forming a connection portion with the control valve may be damaged.

For this reason, in the prior art, a general-purpose and inexpensive mounting flange cannot be used.
As shown in FIG. 1, a mounting flange 102 called a block flange (hereinafter, referred to as a block flange 102) is fixed to a distal end portion of a metal pipe 101 by welding means, and the block flange 102 is directly bolted to the control valve 103. By doing so, the durability against vibration and the like is increased.

However, the aforementioned block flange 102
Each time the type of piping, the shape of the mating member to which the piping is connected, and the like are different, it is necessary to prepare a shape suitable for that, and since the shape becomes special, the cost increases and the cost increases. There is a problem that leads to an increase in

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 improve durability by reducing a load acting on a connection portion of a metal pipe to a control valve. It is an object of the present invention to provide a swiveling construction machine which can be used.

Another object of the present invention is to provide a revolving construction machine in which metal pipes can be connected to a control valve by using, for example, inexpensive split flanges and split flanges. It is in.

[0017]

According to a first aspect of the present invention, there is provided a swing type construction machine comprising: a lower traveling body; an upper revolving body rotatably mounted on the lower traveling body; And a working device provided as possible.

Then, in order to solve the above-mentioned problem,
A feature of the configuration adopted by the invention of claim 1 is that the upper revolving unit is provided with a revolving frame in which the working device is mounted at a central position on the front side, and one of left and right sides of the working device on the front side of the revolving frame. A cab, an engine mounted on a turning frame positioned behind the working device, a hydraulic pump mounted on the engine, and a left and right direction of the working device on the front side of the turning frame. A pedestal provided on the other side, a control valve provided on the pedestal, connecting the control valve and the hydraulic pump, and reaching the turning frame from the control valve via the outer periphery of the pedestal And a clamping means provided on the pedestal and fixing an intermediate portion of the metal pipe to the pedestal.

With this configuration, even if the metal pipe of the control valve and the hydraulic pipe vibrates (oscillates) on the revolving frame, the clamping means connects the metal pipe to the pedestal near the connection to the control valve. , It is possible to prevent a load due to the vibration from acting on the connection portion of the metal pipe.

According to the second aspect of the present invention, the pedestal is provided with a screw portion, and the clamp means clamps the metal pipe between the bracket screwed to the pedestal using the screw portion and the bracket. And a clamp piece to be fixed.

With this configuration, the bracket can be easily attached to the pedestal by using the screw portion provided on the pedestal even after the pedestal and the control valve are mounted on the revolving frame. The clamp piece can be fixed by holding the metal pipe between the bracket and the bracket.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A small swing type hydraulic excavator 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 which is mounted on the lower traveling body 1 so as to be pivotable. A working device 3 is raised and lowered at a central position on the front side of the upper revolving body 2. It is provided as possible.

Reference numeral 4 denotes a revolving frame serving as a base of the upper revolving unit 2. The revolving frame 4 is, as shown in FIGS.
A bottom plate 5 made of a thick steel plate, etc .; a left vertical plate 6, a right vertical plate 7 erected on the bottom plate 5 so as to extend forward and backward; and an overhang extending leftward from the left vertical plate 6. Beams 8A, 8B, 8C
And projecting beams 9A, 9 projecting rightward from the right vertical plate 7.
B, 9C, a left side frame 10 extending frontward and rearward at the tip of each of the overhanging beams 8A, 8B, 8C, and a front side at the tip of each of the overhanging beams 9A, 9B, 9C. A working device 3 is attached to each of the vertical plates 6 and 7. Also, the right overhang beam 9A,
9B and 9C are formed with through holes 9A1 (only one is shown in FIG. 6) for passing hydraulic pipings 33 and 34 described later.

On the front side of the left side frame 10, a left support beam 12 for supporting a cab 19 described later is provided.
Is provided. On the front side of the right side frame 11, a right support beam 13 is provided.
3, a device mounting plate 14 on which a control valve 31 described later is mounted is provided at a position surrounded by the right side frame 11 and the overhang beam 9A.

Further, on the right side frame 11, near the rear side of the front overhanging beam 9A, and at the middle overhanging beam 9A.
Brackets 15, 16 and 17 are provided at three locations near the front side of B and at an intermediate position between the middle overhanging beam 9B and the rear overhanging beam 9C. Also, the bracket 1 is attached to the rear overhanging beam 9C so as to be continuous with the brackets 15, 16 and 17.
8 is provided extending rearward.

On the other hand, reference numeral 19 denotes a cab (see FIGS. 1 and 2) provided on the left side of the left vertical plate 6 at the front side of the revolving frame 4, and inside the cab 19, a driver's seat, an operation lever and the like are provided. Are arranged. Reference numeral 20 denotes a counterweight attached to the rear end of the revolving frame 4. Reference numeral 21 extends from the counterweight 20 to the front, and an engine 24, a hydraulic oil tank 28, a fuel tank 29,
1 shows a building cover that covers the first class and the like. Reference numeral 22 denotes a center joint that forms the center of rotation of the upper revolving unit 2, and reference numeral 23 denotes a hydraulic motor for turning that drives the upper revolving unit to rotate with respect to the lower traveling unit 1 using the center joint 22 as the center of rotation. And a turning device (not shown).

Reference numeral 24 denotes an engine mounted on the rear side of the turning frame 4 in front of the counterweight 20.
The engine 24 includes a center joint 22 (center of rotation).
In order to reduce the distance from the to the rear end of the counterweight 20 to reduce the size of the upper revolving structure 2 and reduce the radius of the revolving structure, the upper revolving structure 2 is mounted in a horizontal state extending left and right.
A radiator 25, an oil cooler 26, and the like are disposed on the left side of the engine 24, and a hydraulic pump 27 described later is mounted on the right side of the engine 24.

Numerals 27, 27 designate two hydraulic pumps attached to the engine 24. Each of the hydraulic pumps 27 has a hydraulic oil tank 28 and a control valve 31 as shown in FIG.
And connected to. The hydraulic pump 27 is driven by the engine 24 to pressurize the hydraulic oil supplied from the hydraulic oil tank 28 to generate pressure oil, and to supply this pressure oil to the control valve 31.

Reference numeral 28 denotes a hydraulic oil tank mounted on the revolving frame 4 in front of the hydraulic pump 27. The hydraulic oil tank 28 stores hydraulic oil to be supplied to each hydraulic pump 27. It is connected to each of the hydraulic pumps 27 via a branched supply pipe 28A.

Reference numeral 29 denotes a fuel tank disposed on the revolving frame 4 adjacent to the front side of the hydraulic oil tank 28, and fuel for supplying to the engine 24 is stored in the fuel tank 29.

Reference numeral 30 denotes a pedestal mounted on the equipment mounting plate 14 located on the right side of the right vertical plate 7 in front of the revolving frame 4, and the pedestal 30 is located on the right side of the equipment mounting plate 14 close to the right side frame 11. It is located closer. Here, when connecting a hydraulic hose 32 for supplying and discharging pressure oil to and from various actuators to the control valve 31, the pedestal 30 defines a space for ensuring a minimum bending radius of the hydraulic hose 32 with the revolving frame 4. Control valve 31
And formed between.

As shown in FIGS. 5 to 7, the pedestal 30 has a mounting plate portion 30A on which a control valve 31 to be described later is mounted and, for example, four legs extending downward from the mounting plate portion 30A. Are roughly constituted by the parts 30B, 30B,... In addition, of the legs 30B, the legs 30B located on the rear side on the left side (inside) in the left and right directions are illustrated in FIG.
As shown in the figure, two bolt holes 30 are separated in the front and rear directions.
C and 30C are formed, and a nut 30D as a screw portion is fixed to the back surface side of the leg portion 30B at a position corresponding to each bolt hole 30C by welding or the like.

A control valve 31 is mounted on a pedestal 30 at the front side of the revolving frame 4 on the right side of the right vertical plate 7. The control valve 31 is an assembly of a large number of control valves, pilot valves and the like. These control valves and the like are in a horizontal state arranged in a row in the horizontal direction.
The control valve 31 has a connection port 31 to which hydraulic pipes 33 and 34 to be described later are connected on the left side and the right side, respectively.
A (shown in FIG. 10) is formed. The control valve 31 is connected to the hydraulic pump 3
The hydraulic oil supplied through 3 and 34 is supplied to the traveling hydraulic motor of the lower traveling unit 1, the turning hydraulic motor 23 of the turning device, and each hydraulic actuator of the working device 3 according to the operation of the operation lever and the like. And actuate them.

Are control valves 31
Are connected to a plurality of actuator-side hydraulic hoses (see FIG. 3). The base end of each hydraulic hose 32 is connected to a control valve 31. Further, the distal end side of each hydraulic hose 32 is connected to the center joint 22, the turning hydraulic motor 23, each hydraulic actuator of the working device 3, and the like.

Numerals 33 and 34 denote two hydraulic pipes connected to the hydraulic pumps 27 and 27 and the control valve 31. The hydraulic pipes 33 and 34 extend from the control valve 31 through the outer periphery of the pedestal 30. Turning frame 4
Metal pipes 33A and 34A whose parts reaching
And a portion between the distal ends of the metal pipes 33A, 34A and the hydraulic pumps 27, 27 has flexibility.
3B and 34B. Also, the metal pipes 33A, 3
Bases 33A1 and 34A1 each having a flange-shaped opening are fixed to an end of the 4A on the control valve 31 side by welding. The hydraulic pipes 33 and 34 are connected to the pipe clamps 36 and 3 on the brackets 15 to 18 of the turning frame 4.
Supported via 6, ...

Here, the metal pipe 33A of the hydraulic pipe 33 located on the right side (outside) extends rearward from the right side of the control valve 31 and then bends downward, so that the equipment mounting plate 1
In the vicinity of 4, it is bent backward. Meanwhile, left side (inside)
Is bent downward while extending rearward from the left side of the control valve 31, and bent rightward in the vicinity of the equipment mounting plate 14 and then bent backward in the vicinity of the outer metal pipe 33A. Thus, it extends substantially parallel to the metal pipe 33A. And metal pipe 33
A and 34A are each bent in advance into the above-described shape before being assembled to the control valve 31.

As described above, the metal pipe 33A connected to the right side of the control valve 31 has the right end of the revolving frame 4 approaching the hose pipe 33B extending forward and backward along the right side frame 11. , It is only necessary to bend it into a substantially crank shape, and its length is short.

On the other hand, the metal pipe 34A connected to the left side of the control valve 31 is far from the hose pipe 34B. It is necessary to bend in a crank shape in the horizontal direction so as to go around, and its length is much longer than the metal pipe 33A on the right side.

Then, the base 3 of the metal pipes 33A, 34A
As shown in FIGS. 9 and 10, the 3A1 and 34A1 are connected to the control valve 31 via a mounting flange 35 (hereinafter, referred to as a split flange 35) called a split flange or a split flange.

Here, the split flange 35 is provided with two semi-circular holding plates 3 which engage with the bases 33A1 and 34A1.
5A and 35A, and each holding plate 35A is bolted to the control valve 31 so that the metal pipe 3
3A and 34A can be attached to the control valve 31. Although the split flange 35 is inferior in the mounting strength as compared with the block flange 102 used in the prior art, various types of pipes (bases) can be mounted if the outer diameters are almost equal. It is available as a general-purpose product and is inexpensive.

On the other hand, the rear ends of the metal pipes 33A, 34A extend through the through holes 9A1 of the overhang beam 9A to a position beyond the frontmost bracket 15, and are connected to the hose pipes 33B, 34B at this position. I have. The rear ends of the metal pipes 33A and 34A are fixed to the bracket 15 using clamps 36, and the hose pipes 33B and 34B
Are clamps 36,3 on brackets 16,17,18.
It is fixed using 6,.

Reference numeral 37 denotes a leg 3 located on the left rear side of the base 30.
The clamp member 37 is a clamp member provided as a clamping means according to the present embodiment provided in the bracket 0B. As shown in FIG. 8, the clamp member 37 is generally constituted by a bracket 38, a bolt 39, a clamp piece 40, and the like, which will be described later.

Reference numeral 38 denotes a bracket.
By bending a strip-shaped flat plate into a crank shape,
A mounting plate portion 38A that contacts the leg portion 30B of the pedestal 30, and a horizontal plate portion 3 that extends horizontally from a lower portion of the mounting plate portion 38A.
8B and a pipe holding plate 38C bent downward from the tip of the horizontal plate 38B. Also, the mounting plate 3
8A, two bolt holes 38D, 38D are formed at positions corresponding to the bolt holes 30C, 30C of the leg 30B. Further, a bolt hole 38E is provided in the pipe holding plate portion 38C.
Are formed.

Reference numerals 39 and 39 denote two bolts for attaching the bracket 38 to the pedestal 30. Each of the bolts 39 is a bolt hole 38D of the bracket 38 and a bolt hole 30C of the leg 30B.
The bracket 38 can be fixedly attached to the pedestal 30 by inserting the bracket 38 into the nut 30D. Here, when the bracket 38 is attached to the pedestal 30 with the bolt 39, the nut 30D is previously welded to the back surface of the leg 30B.
The bracket 38 can be easily attached even after the control valve 31 is installed.

Reference numeral 40 denotes a clamp piece for fixing the metal pipe 34A of the hydraulic pipe 34 to the bracket 38.
Reference numeral 0 denotes an arc-shaped pipe holding portion 40A that presses the metal pipe 34A at the distal end side, and has a bolt hole 40B formed at the base end side. The clamp piece 40 is connected to the pipe holding plate portion 3.
The metal pipe 34A is disposed between the metal pipe 8C and the pipe holding part 40A, and in this state, the bolt 41 is inserted into the bolt hole 40B and the bolt hole 3 formed in the pipe holding plate part 38C of the bracket 38.
The metal pipe 34A is sandwiched and fixed between the pipe holding part 40A and the pipe holding plate 38C by inserting the nut 42 into the tip end of the pipe 8E and screwing the nut 42 to the tip.

The clamp member 37 is configured as described above, and the mounting plate 38A of the bracket 38 abuts on the leg 30B of the pedestal 30. In this state, the bracket 38 is attached to the leg 30B using the bolt 39. Fix it. Next, the metal pipe 34A is arranged between the pipe holding plate 38C of the bracket 38 and the pipe holding part 40A of the clamp piece 40. In this state, the clamp member 3 is fixed by the bolt 41 and the nut 42.
By attaching the bracket 7 to the bracket 38, the metal pipe 34A can be held and fixed between the pipe holding plate 38C and the pipe holding part 40A.

The hydraulic shovel according to the present embodiment has the above-described configuration. Next, the operation thereof will be described.

First, when the engine 24 is driven, hydraulic oil is discharged from hydraulic pumps 27, 27 attached to the engine 24, and this hydraulic oil is supplied to the control valve 31 via hydraulic piping 33, 34. The control valve 31 supplies the hydraulic oil supplied from the hydraulic pump 27 to the traveling hydraulic motor of the lower traveling body 1 via the hydraulic hose 32 in accordance with the operation of the operation lever and the like in the cab 19, The undercarriage 1 is driven, supplied to the actuator of the working device 3, and the working device 3 is operated to perform excavation work, etc., and the turning hydraulic motor 2 of the turning device is used.
3 to rotate the upper rotating body 2.

Here, vibration occurs during traveling or excavation work by the working device 3, but the long left metal pipe 34.
A is a metal pipe 34A because a connection portion to the control valve 31, that is, a position near the split flange 35 is fixed to the pedestal 30 by the clamp member 37.
Can be suppressed from acting on the split flange 35, and the load acting on the split flange 35 and the like can be reduced.

As described above, according to the present embodiment, the clamp member 37 is provided on the leg 30B of the pedestal 30, and the hydraulic pipe 34 is connected to the control valve 31 via the outer periphery of the pedestal 30. The middle part of the long metal pipe 34 </ b> A is fixed to the pedestal 30 by the clamp member 37. Therefore, even when vibration acts on the metal pipe 34A, the clamp member 37 can prevent the load due to the vibration from acting on the split flange 35 that fixes the metal pipe 34A to the control valve 31. As a result, it is possible to prevent the metal pipe 34A from being damaged by vibration, and to improve durability and reliability. Further, since an inexpensive general-purpose split flange 35 can be used as a mounting flange for fixing the end of the metal pipe 34A, the cost can be reduced.

Also, since the bolt holes 30C and the nuts 30D are previously provided in the leg portions 30B of the pedestal 30, when the bracket 38 is mounted on the leg portions 30B, it can be mounted only by screwing the bolts 39 from the outside. Thus, even after the pedestal 30 and the control valve 31 are mounted on the revolving frame 4, the bracket 38 can be attached to the pedestal 3.
0 can be easily retrofitted. As a result, connection work and disassembly work for the control valve 31 can be easily performed, and assemblability and maintainability can be improved.

In the embodiment, the leg 3 of the pedestal 30
0B is provided with a bolt hole 30C, and a nut 30D forming a threaded portion corresponding to the bolt hole 30C is welded to the back surface side of the leg portion 30B as an example. However, the present invention is not limited to this. For example, the nut 30D may be omitted, and a female screw may be formed in the bolt hole 30C. Also, leg 3
The stud bolt may be welded to OB and the bracket 38 may be fixed using a nut.

In the embodiment, two hydraulic pumps 27 are provided, and each of the hydraulic pumps 27 and the control valve 3
1 is connected by two hydraulic pipings 33 and 34. However, for example, when three or more hydraulic pumps are provided, the number of hydraulic pipes may be increased according to the number of the hydraulic pumps to cope with this.

Further, in the embodiment, the control valve 31 has been described as a horizontal state in which a large number of control valves and the like are arranged in a horizontal direction. However, the present invention is not limited to this. Alternatively, a large number of control valves and the like may be stacked vertically and vertically.

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

[0057]

As described in detail above, according to the first aspect of the present invention, the upper revolving unit has a revolving frame on which the working device is mounted at the center position on the front side, and a left side of the working device on the front side of the revolving frame. A cab provided on one side in the right direction, an engine mounted on a revolving frame positioned on the rear side of the working device, a hydraulic pump mounted on the engine, and a front side of the revolving frame A pedestal provided on the other side in the left and right directions of the device, a control valve provided on the pedestal, connecting the control valve to the hydraulic pump, and moving an outer periphery of the pedestal from the control valve; A hydraulic pipe formed by using a metal pipe to reach the revolving frame via a pipe, and a clamp provided on the pedestal and fixing an intermediate portion of the metal pipe to the pedestal. There.

Therefore, even if the control valve and the hydraulic piping vibrate (sway) on the turning frame, the clamping means fixes the metal piping to the base near the connection to the control valve. In addition, it is possible to prevent a load due to the vibration from acting on the connection portion of the metal pipe. As a result, the metal pipe can be prevented from being damaged by vibration, and the durability can be improved and the reliability can be improved. In addition, since an inexpensive general-purpose mounting flange can be used instead of an expensive mounting flange having strength against vibration, the cost can also be reduced.

According to the second aspect of the present invention, the pedestal is provided with a screw portion, and the clamping means holds the metal pipe between the bracket screwed to the pedestal using the screw portion and the bracket. And fixed clamp pieces. Therefore, even after the pedestal and the control valve are mounted on the revolving frame, the bracket can be easily retrofitted to the pedestal using the screw portion provided on the pedestal. Can be pinched and fixed. As a result, connection work and disassembly work of piping to the control valve and the like can be easily performed, and assemblability and maintainability can be improved.

[Brief description of the drawings]

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

FIG. 2 is an enlarged plan view showing the hydraulic excavator according to the embodiment of the present invention.

FIG. 3 is a plan view showing the upper revolving structure with a cab, a building cover, and the like removed.

FIG. 4 is a cross-sectional view of the upper revolving superstructure viewed from a direction indicated by arrows IV-IV in FIG. 3;

FIG. 5 is an enlarged plan view of a main part, showing a base, a control valve, a hydraulic pipe, a clamp member, and the like together with a part of a revolving frame;

FIG. 6 is an enlarged sectional view of a main part of a pedestal, a control valve, a hydraulic pipe, a clamp member and the like together with a revolving frame, as viewed from a direction indicated by arrows VI-VI in FIG.

7 shows a pedestal, a control valve, a hydraulic pipe, a clamp member and the like together with a revolving frame as shown by arrows VII-VII in FIG.
It is the principal part expanded sectional view seen from the direction.

FIG. 8 is an exploded perspective view showing an enlarged clamp member.

FIG. 9 is a partially cutaway front view of the split flange for fixing the metal pipe to the control valve as viewed from the direction indicated by arrows IX-IX in FIG.

FIG. 10 is a cross-sectional view of the split flange as viewed in a direction indicated by arrows XX in FIG. 9;

FIG. 11 is a partially cutaway front view showing a block flange used in the prior art.

FIG. 12 shows a block flange with arrows XII-XII in FIG.
It is sectional drawing seen from the direction.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Upper revolving superstructure 3 Working device 4 Revolving frame 19 Cab 24 Engine 27 Hydraulic pump 30 Pedestal 30A Mounting plate part 30B Leg part 30C Bolt hole 30D Nut (screw part) 31 Control valve 33, 34 Hydraulic piping 33A, 34A Metal piping 35 Split flange (mounting flange) 37 Clamp member (Clamp means) 38 Bracket 40 Clamp piece

Claims (2)

[Claims] A revolving construction machine comprising a lower traveling body, an upper revolving body rotatably mounted on the lower traveling body, and a working device provided on the upper revolving body to be capable of elevating, The upper revolving unit includes a revolving frame on which the working device is mounted at a central position on the front side, a cab provided on one side in the left and right directions of the working device at a front side of the revolving frame, and An engine mounted on the revolving frame positioned at the rear side, a hydraulic pump mounted on the engine, and a pedestal provided on the front side of the revolving frame at the left and right sides of the working device on the other side. And a control valve provided on the pedestal, connecting the control valve to the hydraulic pump, and using a metal pipe for a portion reaching the turning frame from the control valve via the outer periphery of the pedestal. A hydraulic pipe formed Te, provided in the pedestal, swivel construction machine, characterized by being configured by a clamping means for fixing the middle portion of the metal tubing to the pedestal. 2. The pedestal is provided with a screw portion, and the clamping means clamps and fixes the metal pipe between a bracket screwed to the pedestal using the screw portion and the bracket. 2. The swiveling construction machine according to claim 1, wherein the construction machine comprises a clamp piece.