JP2866258B2 - Construction machinery - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a hydraulic excavator,
The present invention relates to a construction machine such as a hydraulic crane, and more particularly to a construction machine that connects a working device and a valve device with a hydraulic pipe.

[0002]

2. Description of the Related Art FIGS. 8 to 12 show a hydraulic shovel as an example of a conventional construction machine.

In the drawing, reference numeral 1 denotes a lower traveling body provided with a traveling hydraulic motor (not shown) and the like, and 2 denotes a lower traveling body 1
, A revolving unit 3 provided on the lower traveling unit 1 via the revolving unit 2 indicates an upper revolving unit as a working machine body which is rotatably mounted, and the upper revolving unit 3 has a frame structure. A turning frame 4 to be formed, a machine room 5 provided on the turning frame 4 and containing an engine, a hydraulic pump (both not shown) and the like, and a turning position located on the front left side of the machine room 5 A driver's cab 6 provided on the frame 4 and provided with an operation lever device (not shown) is provided, and a counter weight 7 is provided at a rear portion of the upper swing body 3.

Here, as shown in FIG. 9, the turning frame 4 has a main plate 4A on which the turning device 2 and the like are mounted.
And a pair of main beams 4B, 4B provided on the main plate 4A to be separated to the left and right.
The distal end side of B is a mounting bracket 4C, 4C for mounting a boom 9 and a boom cylinder 12, which will be described later, and these constitute a main frame. The left side of the main beam 4B is a left frame on which the driver's cab 6 and the like are mounted, and the right side of the main beam 4B is a right frame (not shown) on which a fuel tank, a hydraulic oil tank and the like are mounted.

[0005] Reference numeral 8 denotes a working device provided at a front portion of the upper revolving unit 3. The working device 8 includes a boom 9 rotatably provided on each mounting bracket 4 C of the revolving frame 4, and a boom 9. Arm 10 rotatably provided on the tip side of the robot
And a backhoe-type bucket 11 rotatably provided on the distal end side of the arm 10. The boom 9, the arm 10, and the bucket 11 are connected to the boom cylinder 1.
2, an arm cylinder 13 and a bucket cylinder 14, respectively.

In FIG. 9, reference numeral 15 designates a valve device mounted on the revolving frame 4 via a support 19 to be described later. The valve device 15 has a plurality of control valves 15A, 15A,. Are formed integrally, and a plurality of connection ports 15B, 15B,... Are provided on both side surfaces thereof. And
The valve device 15 switches each control valve 15A in accordance with the operation of the operation lever device, and supplies and discharges the pressure oil supplied from the hydraulic pump to each of the cylinders 12, 13, and 14.

Reference numerals 16, 16,... Denote a plurality of hydraulic pipes (only four are shown) disposed between the valve device 15 and each of the cylinders 12, 13, 14; One end is connected to each connection port 15B of the valve device 15, and the other end is connected to each cylinder 12, 13, 1 via a hydraulic hose or the like.
4 (not shown).

Reference numeral 17 denotes a substantially H-shaped mounting plate provided between the main beams 4B near the mounting brackets 4C of the revolving frame 4. Reference numeral 18 denotes a fixing means such as welding on the mounting plate 17. Each of the L-shaped pipe support portions fixedly used is shown, and each hydraulic pipe 16 is provided on the upper surface side of the pipe support portion 18.
Support brackets 18A, 1 through which the distal ends of
8A,... (Only four are shown) are provided apart from each other in the longitudinal direction. The pipe support portion 18 supports the front end side of each hydraulic pipe 16 via each support bracket 18A.

Reference numeral 19 denotes a pedestal provided on the lower side of the valve device 15. The pedestal 19 is accommodated in a pedestal accommodating portion 20, which will be described later, and is fixed to the revolving frame 4. In addition, the cradle 1
Inside 9, hydraulic devices (both not shown) such as a high-pressure selection valve and a parking brake control valve connected to each control valve 15 </ b> A of the valve device 15 are provided.

Reference numeral 20 denotes a bottomed cylindrical receiving base receiving section which is located at the rear of the mounting plate 17 and is provided integrally between the main beams 4B of the revolving frame 4. The receiving stand 19 is fixed by welding.

Reference numerals 21 and 21 denote fixing brackets provided in the middle of each hydraulic pipe 16, and, for example, two or three hydraulic pipes 16 are inserted through each fixing bracket 21. Each of the fixed brackets 21 is connected to each of the hydraulic pipes 1.
6 are bundled and fixed.

The conventional hydraulic excavator has the above-described configuration. Next, a method of connecting pipes will be described with reference to FIGS.

First, FIG. 10 shows a mounting step of the pedestal and the pipe supporting portion. In this mounting step, the pipe supporting portion 18 is fixed to the mounting plate 17 by welding.
And fixed by welding.

Next, in the valve device mounting step shown in FIG.
The valve device 15 is placed on the cradle 19 fixed in the cradle accommodation portion 20.
Is mounted, and the valve device 15 and the receiving stand 19 are fixed via mounting bolts or the like.

[0015] In the piping connection step shown in FIG.
The base end of each hydraulic pipe 16 is connected to the connection port 15B of the valve device 15 attached in the valve device attaching step, and the distal end side of each hydraulic pipe 16 is connected to each support bracket 1 of the pipe support portion 18.
8A. The connection between the hydraulic equipment in the receiving table 19 and the valve device 15 is also performed.

Finally, each hydraulic piping 1 is connected via a hydraulic hose.
6 and the supply / discharge ports of the cylinders 12, 13, and 14 are connected to complete the pipe connection operation.

In this way, the hydraulic shovel, which has completed the pipe connection work, uses the hydraulic oil discharged from the hydraulic pump in the machine room 5 through the valve device 15, the hydraulic pipes 16 and the like to the respective cylinders 12, 13,. By supplying / discharging to / from the work 14, work such as excavation is performed by the working device 8.

[0018]

In the above-mentioned conventional hydraulic excavator, the hydraulic oil from the hydraulic pump is supplied to each cylinder 1 via the valve device 15 and each hydraulic pipe 16.
By supplying / discharging to / from 2, 13, and 14, predetermined operations such as excavation operations can be performed. However, the pipe support portion 18 is fixed to the mounting plate 17 in advance by means such as welding, and the valve device 15 is mounted on the receiving base 19 fixed in the receiving base housing portion 20 by welding. Therefore, the connection work of each hydraulic pipe 16 is the last.

For this reason, according to the above-described prior art, each hydraulic pipe 16 must be carried on the turning frame 4 having a poor scaffold to perform the pipe connection operation. It is difficult to position the connection port 15B and the pipe support portion 18 with each support bracket 18A, and there is a problem that the work efficiency of pipe connection, the reliability of connection, and the like are significantly reduced.

In addition, since a precise pipe connection work is performed on the revolving frame 4 having a poor scaffold, there is a problem that the safety during the work is greatly reduced.

The present invention has been made in view of the above-mentioned problems of the prior art, and can easily and accurately mount a hydraulic pipe to a valve device and a pipe support, thereby improving work efficiency and safety of the pipe connection work. It is an object of the present invention to provide a construction machine which can be used.

[0022]

In order to solve the above-mentioned problems, a feature of the configuration adopted by the present invention is that a working machine main body has a mounting portion which is located on the working device side and to which a pipe supporting portion is mounted. The receiving base is provided detachably in the receiving base housing part.

[0023]

According to the above construction, the pipe support portion and the receiving stand can be made independent of the work equipment body. Therefore, the base end side of the hydraulic pipe is connected to the valve device, and the distal end side of the hydraulic pipe is connected to the pipe support portion. After the support, the pipe support portion is fixed to the work machine main body via the attachment portion, and the pedestal can be housed in the pedestal housing portion together with the valve device.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In the embodiment, the same components as those in the prior art shown in FIGS. 8 to 12 are denoted by the same reference numerals, and description thereof will be omitted.

In the drawing, reference numeral 30 denotes a cradle according to this embodiment.
The cradle 30 is different from the cradle 19 described in the prior art, and is detachably provided in the cradle accommodating portion 20 via mounting bolts 36, 36,.

Reference numeral 31 denotes a pipe support applied to this embodiment in place of the pipe support 18 according to the prior art. On the upper surface side of the pipe support 31, a pipe support 1 described in the prior art is provided.
8, support brackets 31 </ b> A, 31 </ b> A,... (Only four are shown) for supporting the distal end side of each hydraulic pipe 16 are provided. However, the pipe support 31 according to this embodiment
As will be described later, the valve device 15, the hydraulic piping 16, the pedestal 3
0, etc., and is pre-assembled as a pipe assembly 32. The mounting plate 1 is mounted via mounting portions 33, 33,.
7 in that it differs from the prior art.

Reference numerals 33, 33,... Denote substantially triangular mounting portions which are disposed on the mounting plate 17 so as to be spaced apart from each other in the longitudinal direction. It is fixed by using. Each of the mounting portions 33 horizontally supports the pipe supporting portion 31 from below.

Numeral 34 denotes a valve device 15, a hydraulic pipe 16, and a pedestal 3.
0, a wire as a transport means for transporting a pipe assembly 32 including a pipe support portion 31 while suspending the wire assembly. The wire 34 is connected to an elevator (not shown) having a pulley, an electric motor and the like at the upper end side. It is wound, and its lower end is branched into, for example, four, and attached to the pipe support 31 and the cradle 30. The wire 34 is conveyed to the revolving frame 4 while suspending the pipe assembly 32 assembled in another process, and extends downward when the wire assembly 34 reaches a predetermined position to lower the pipe assembly 32 to the revolving frame 4. It is to let.

Also, 35, 35,... Shown in FIG.
Hydraulic devices such as a high-pressure selection valve and a parking brake control valve provided in the cylinder 0, the pedestal 30 and the pedestal housing 20
Mounting bolts (only two are shown).

The hydraulic excavator according to the present embodiment has the above-described configuration. Next, a method of connecting pipes will be described with reference to FIGS.

First, in the connection step within the receiving stand, as shown in FIGS. 2 and 3, hydraulic devices 35, 35,... Such as a high-pressure selection valve and a parking brake control valve are mounted in the empty receiving stand 30.

Next, in the valve device mounting step shown in FIG. 4, the valve device 15 is placed on the receiving table 30 and fixed with mounting bolts or the like. Make a connection with

In the pipe assembly forming step shown in FIG. 5, the base end side of each hydraulic pipe 16 is connected to each connection port 1 of the valve device 15.
5B, the distal end side of each hydraulic pipe 16 is inserted into and supported by each support bracket 31A of the pipe support portion 31, and the middle of each hydraulic pipe 16 is fixed by a fixing bracket 21, so that the valve device 15, A pipe assembly 32 including the hydraulic pipe 16, the pipe support 31, the pedestal 30, and the fixed bracket 21 is formed.

Next, in the transport mounting step shown in FIG. 6, a wire 34 is connected to the pipe assembly 32 formed in the pipe assembly forming step, and the pipe assembly 32 is connected to the revolving frame 4 via the wire 34. Transport. And the piping assembly 32
When has reached the predetermined position, the wire 34 is extended downward, the receiving table 30 is stored in the receiving table receiving section 20, and the pipe support section 31 is placed on each mounting section 33.

Finally, the pedestal 30 is fixed to the pedestal accommodating portion 20 via mounting bolts 36, 36,.
Is fixed to each mounting portion 33 using a fixing step such as a mounting bolt or the like, and the leading end side of each hydraulic pipe 16 is connected to each supply / discharge port of each cylinder 12, 13, 14 via a hydraulic hose, The pipe connection work of the excavator is completed.

Thus, according to the present embodiment, each mounting portion 33 is provided on the mounting plate 17 forming a part of the revolving frame 4,
Since the receiving base 30 is configured to be removably attached to the receiving base accommodating portion 20 via the mounting bolts 36, the pipe support portion 31 can be mounted on the turning frame 4 via the mounting portions 33 and the like.

As a result, as shown in FIGS. 2 to 5, each of the hydraulic pipes 16, the valve device 15 and the like and the revolving frame 4 can be separated from each other. After the hydraulic equipment 35 is mounted and the valve device 15 is mounted on the pedestal 30, each hydraulic pipe 16 is mounted on the valve device 15 and the pipe support 31, so that the valve device 15, each hydraulic pipe 16, the pedestal A pipe assembly 32 formed by integrating the pipe 30, the pipe support 31 and the like can be manufactured accurately. The pipe assembly 32 is transported to the revolving frame 4 via the wire 34, the receiving table 30 is received in the receiving table receiving section 20, and the pipe supporting section 31 is placed on each mounting section 33. In addition, the pipe assembly 32 can be easily attached to the revolving frame 4, and the work efficiency, safety, reliability, and the like of the pipe connection work can be greatly improved.

That is, each hydraulic pipe 16 for which precision is required
The connection work between the valve and the valve device 15 or the like can be easily performed in a separate step with high stability, and the workability and reliability of the pipe connection work can be greatly improved.

When the pipe assembly 32 is mounted on the revolving frame 4, the pedestal 30 may be housed in the pedestal housing 20, and the pipe support 31 may be mounted on each mounting part 33. Therefore, the mounting work can be easily performed with relatively rough positioning, and the working efficiency can be greatly improved.

Therefore, as described above, according to this embodiment,
The connection work of the hydraulic piping 16 requiring high precision is performed in a separate process with high stability, and the mounting work of the piping assembly 32 requiring no high precision is performed on the revolving frame 4, that is, the quality of the work By dividing the process according to
Work efficiency, reliability and safety of the pipe connection work can be greatly improved.

In the above embodiment, a crawler-type hydraulic excavator is exemplified as a construction machine. However, the present invention is not limited to this, and is widely applied to other construction machines such as a wheel-type hydraulic excavator and a hydraulic crane. Can be applied.

[0042]

As described above in detail, according to the present invention, the working machine main body is provided with a mounting portion which is located on the working device side and to which the pipe supporting portion is mounted, and the pedestal is attached to and detached from the pedestal receiving portion. The valve device, the hydraulic piping, the pedestal, the pipe support, and the like can be made independent of the work equipment body. The base end of the hydraulic piping is connected to the valve device, After the distal end side is supported by the pipe support section, the pipe support section is fixed to the working machine main body via the mounting section, and the receiving table can be stored in the receiving table receiving section together with the valve device.

As a result, after the valve device is mounted on the pedestal in a separate process in advance, the valve device, the hydraulic piping, the pedestal, the pipe support, etc. The pedestal is accommodated in the pedestal accommodating section, and the pipe support section is placed on each mounting section. It can be easily attached to the work equipment body, and the work efficiency, safety, reliability, etc. of the pipe connection work can be improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an enlarged main part of a hydraulic shovel according to an embodiment of the present invention.

FIG. 2 is a front view showing a receiving stand before a hydraulic device is installed.

FIG. 3 is a front view showing a state in which a hydraulic device is installed in the receiving stand in FIG. 2 by a connecting step in the receiving stand.

FIG. 4 is a front view showing a state where the valve device is mounted on the receiving stand in FIG. 3 by a valve device mounting step.

FIG. 5 is a front view schematically showing a hydraulic pipe on the near side in a state where a hydraulic pipe or the like is attached to the valve device in FIG. 4 in a pipe assembly forming step.

FIG. 6 is a front view similar to FIG. 5, showing a state in which the pipe assembly in FIG.

FIG. 7 is a front view similar to FIG. 6, showing a completed state in which the piping assembly is mounted on a turning frame.

FIG. 8 is an overall view showing a conventional hydraulic excavator.

9 is an enlarged perspective view showing a main part in FIG. 8;

FIG. 10 is a front view showing a state in which a pipe support section and the like are fixed to a revolving frame by a receiving stand and a pipe support section mounting step.

FIG. 11 is a front view showing a state in which the valve device is attached to the receiving stand in FIG. 10 by a valve device attaching step.

12 is an explanatory view schematically showing a state in which a hydraulic pipe or the like is connected to the valve device shown in FIG.

[Explanation of symbols]

 Reference Signs List 3 upper revolving superstructure (working machine main body) 8 working device 15 valve device 16 hydraulic piping 20 pedestal receiving section 30 pedestal 31 pipe support section 32 pipe assembly 33 mounting section 36 mounting bolt

Claims (1)

(57) [Claims] 1. A work machine main body, a work device provided at a front portion of the work machine body so as to be able to move up and down, a valve device for controlling pressure oil to the work device, and a base end side of the valve device. A hydraulic pipe connected and having a distal end connected to the working device, a piping support provided at a front side of the working machine main body, and supporting a distal end of the hydraulic piping, and provided below the valve device. In a construction machine comprising a receiving stand provided on the working machine main body and a receiving base accommodating portion to which the receiving stand is attached, the working machine main body has the piping support portion located on a working device side. A construction machine, comprising: a mounting portion to be mounted; and a detachable mounting of the receiving table in the receiving table receiving section.