JPH0610372A - Construction equipment - Google Patents

Abstract

PURPOSE:To enhance piping connection work efficiency and safety or the like by mounting a hydraulic pipe to a valve device or a piping support device with ease and accuracy. CONSTITUTION:Each mounting section 33 is installed to a mounting plate 17 which forms a part of a swing frame 4. A piping support section 31 is mounted to the swing frame 4 by way of each mounting section 33 while a pedestal 30 is mounted to a pedestal housing section 20 with mounting bolts 6. This construction makes it possible to separate the swing frame 14 from hydraulic piping 16 or the like in different systems. Hydraulic equipment is mounted in the pedestal 30 preliminarily in a different process and a valve device 15 is installed to the pedestal 30. Then, each hydraulic piping 16 is mounted to the valve device and the piping support section 31, which makes it possible to manufacture a piping assembly which comprises the valve device 15, each hydraulic piping 16, the pedestal 30, and the piping support section 31, which are all integrated and carry over the piping assembly 32 to the swing frame 4 by way of wires 34 so that they may be mounted there.

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 in which a working device and a valve device are connected by hydraulic piping.

[0002]

2. Description of the Related Art A hydraulic excavator is shown as an example of a conventional construction machine in FIGS.

In the drawing, 1 is a lower traveling body provided with a traveling hydraulic motor (not shown) and the like, and 2 is the lower traveling body 1.
The upper and lower revolving units 3 provided on the lower revolving unit 1 are revolvably mounted on the lower traveling unit 1 via the revolving unit 2, respectively, and the upper revolving unit 3 has a frame structure. Forming revolving frame 4, machine room 5 provided on the revolving frame 4 and accommodating an engine, hydraulic pump (neither shown), etc., and revolving at a front left side of the machine room 5. A driver's cab 6 provided on a frame 4 and provided with an operation lever device (not shown) is roughly configured, and a counterweight 7 is provided at a rear portion of the upper swing body 3.

Here, as shown in FIG. 9, the swivel frame 4 has a main plate 4A on which a swivel device 2 and the like are mounted.
And a pair of main beams 4B, 4B provided on the main plate 4A and spaced apart left and right, respectively.
The front ends of B are mounting brackets 4C and 4C for mounting a boom 9 and a boom cylinder 12, which will be described later, respectively, 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, etc. are mounted.

Reference numeral 8 denotes a working device provided in the front part of the upper swing body 3, and the working device 8 is a boom 9 rotatably provided on each mounting bracket 4C of the swing frame 4, and the boom 9 thereof. 10 rotatably provided on the tip side of the arm
And a backhoe type bucket 11 rotatably provided on the tip end side of the arm 10, and the boom 9, the arm 10 and the bucket 11 are the boom cylinder 1 and the boom cylinder 1.
2, the arm cylinder 13 and the bucket cylinder 14 respectively operate.

In FIG. 9, reference numeral 15 denotes a valve device mounted on the swivel frame 4 via a receiving base 19 which will be described later. The valve device 15 comprises a plurality of control valves 15A, 15A, ... (Only four valves are shown). Are integrally formed, 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 according to the operation of the operation lever device, and supplies and discharges the pressure oil supplied from the hydraulic pump to each cylinder 12, 13, 14.

Reference numerals 16, 16, ... Show a plurality of hydraulic pipes (only four pipes are shown) arranged between the valve device 15 and the cylinders 12, 13, 14, respectively. The end side is connected to each connection port 15B of the valve device 15, and the tip side thereof is connected to each cylinder 12, 13, 1 via a hydraulic hose or the like.
4 are connected to the supply / discharge ports (neither is shown).

Reference numeral 17 denotes a substantially H-shaped mounting plate provided between the main beams 4B and located near each mounting bracket 4C of the revolving frame 4, and 18 denotes a fixing means such as welding on the mounting plate 17. Each of the substantially L-shaped pipe support portions secured by using the hydraulic pipes 16 is shown on the upper surface side of the pipe support portion 18.
Support brackets 18A, 1 through which the tip ends of the
8A, ... (Only four are shown) are provided at intervals in the longitudinal direction. The pipe support portion 18 supports the tip 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, and the pedestal 19 is accommodated in a cradle accommodating portion 20 which will be described later and is fixed to the swivel frame 4. Also, the cradle 1
Inside the valve 9, hydraulic devices (not shown) such as a high pressure selection valve and a parking brake control valve connected to each control valve 15A of the valve device 15 are provided.

Reference numeral 20 denotes a bottomed cylindrical pedestal accommodating portion that is integrally provided between the main beams 4B of the swivel frame 4 and is located at the rear of the mounting plate 17. The pedestal 19 is fixed by welding.

Reference numerals 21 and 21 denote fixed brackets provided in the middle of each hydraulic pipe 16, and two or three hydraulic pipes 16 are inserted into each fixed bracket 21. The fixed brackets 21 are attached to the hydraulic pipes 1
A part of 6 is bundled and fixed.

The hydraulic excavator according to the prior art has the above-mentioned structure. Next, the pipe connecting method will be described with reference to FIGS. 10 to 12.

First, FIG. 10 shows a pedestal and pipe supporting portion mounting step. In this mounting step, the pipe supporting portion 18 is welded and fixed to the mounting plate 17, and the pedestal 19 is placed in the cradle accommodating portion 20.
Are accommodated and fixed by welding.

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

Then, in the pipe connecting step shown in FIG.
The base end side 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 tip end side of each hydraulic pipe 16 is attached to each support bracket 1 of the pipe support portion 18.
Insert into 8A. Further, the hydraulic equipment in the cradle 19 and the valve device 15 are also connected.

Finally, each hydraulic pipe 1 via a hydraulic hose
The tip side of 6 is connected to the supply / discharge ports of each cylinder 12, 13, 14 to complete the pipe connection work.

In this way, the hydraulic excavator, which has completed the pipe connection work, transfers the pressure oil discharged from the hydraulic pump in the machine chamber 5 to the cylinders 12, 13, through the valve device 15, the hydraulic pipes 16, etc. By supplying / discharging to / from 14, the work device 8 performs work such as excavation.

[0018]

By the way, in the hydraulic excavator according to the above-mentioned conventional technique, the pressure oil from the hydraulic pump is passed through the valve device 15 and the hydraulic pipes 16 to the respective cylinders 1.
By supplying and discharging to 2, 13, and 14, predetermined work such as excavation work can be performed. However, the pipe support portion 18 is previously fixed to the mounting plate 17 by means of welding or the like, and the valve device 15 is mounted on the pedestal 19 fixed to the pedestal housing portion 20 by welding. Therefore, the connection work of each hydraulic pipe 16 is the last.

Therefore, according to the above-mentioned conventional technique, each hydraulic pipe 16 has to be carried up on the revolving frame 4 having a poor scaffolding to perform the pipe connection work. Therefore, each hydraulic pipe 16 and the valve device 15 need to be connected. There is a problem that it is difficult to align the connection port 15B and the pipe support portion 18 with the respective support brackets 18A, and the work efficiency of the pipe connection and the reliability of the connection are significantly reduced.

Further, since the precise pipe connecting work is performed on the revolving frame 4 having a poor scaffolding, there is a problem that the safety during the work is significantly lowered.

The present invention has been made in view of the above-mentioned problems of the prior art, and the hydraulic pipe can be easily and accurately attached to the valve device and the pipe supporting portion, and the work efficiency and safety of the pipe connecting work can be improved. It is an object to provide a construction machine that is made possible.

[0022]

In order to solve the above-mentioned problems, the feature of the structure adopted by the present invention is that the working machine main body is provided with a mounting portion which is located on the working device side and to which the pipe support portion is mounted. That is, the pedestal is provided in the pedestal accommodating portion in a detachable manner.

[0023]

With the above construction, since the pipe support portion and the pedestal can be independent of the working machine main body, the base end side of the hydraulic pipe is connected to the valve device, and the tip end side of the hydraulic pipe is connected by the pipe support portion. After being supported, the pipe supporting portion can be fixed to the working machine main body through the mounting portion, and the pedestal can be housed in the cradle housing portion together with the valve device.

[0024]

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

In the figure, 30 is a pedestal according to this embodiment,
Unlike the pedestal 19 described in the related art, the pedestal 30 is detachably provided in the pedestal accommodation portion 20 via mounting bolts 36, 36, ...

Reference numeral 31 denotes a pipe support portion applied to this embodiment in place of the pipe support portion 18 according to the prior art. On the upper surface side of the pipe support portion 31, the pipe support portion 1 described in the prior art is provided.
In the same manner as 8, the support brackets 31A, 31A, ... (Only four are shown) that support the tip side of each hydraulic pipe 16 are provided. However, the pipe support 31 according to the present embodiment
As will be described later, the valve device 15, the hydraulic pipes 16, the pedestal 3
0 and the like are assembled in advance as the pipe assembly 32, and the mounting plate 1 is mounted via mounting portions 33, 33, ...
It is different from the prior art in that it is attached to No. 7.

Reference numerals 33, 33, ... Show substantially triangular mounting portions arranged on the mounting plate 17 so as to be spaced apart from each other in the longitudinal direction, and each mounting portion 33 is fixed to the upper surface of the mounting plate 17 by welding or the like. It has been fixed using. Then, each of the mounting portions 33 is configured to horizontally support the pipe support portion 31 from the lower side.

Reference numeral 34 designates the valve device 15, the hydraulic pipe 16, the pedestal 3
0, a wire as a carrying means for carrying the pipe assembly 32 including the pipe support 31 while suspending it. The wire 34 is connected to an elevator (not shown) whose upper end side is a pulley, an electric motor or the like. It is wound, and the lower end side is branched into, for example, four pieces and attached to the pipe support portion 31 and the pedestal 30. Then, the wire 34 hangs the pipe assembly 32 assembled in a separate process and conveys it to the swivel frame 4, and when it reaches a predetermined position, it extends downward to descend the pipe assembly 32 to the swivel frame 4. It is what makes me.

Further, 35, 35, ... Shown in FIG.
The hydraulic equipment such as a high-pressure selection valve, a parking brake control valve, etc. provided in 0, 36, 36, ...
It is a mounting bolt (only two are shown) to be attached to.

The hydraulic excavator according to this embodiment has the above-mentioned structure. Next, the pipe connecting method will be described with reference to FIGS. 2 to 7.

First, in the pedestal connecting step, as shown in FIGS. 2 and 3, hydraulic equipments 35, 35, ... Such as a high pressure selection valve and a parking brake control valve are mounted in an empty pedestal 30.

Next, in the valve device mounting step shown in FIG. 4, the valve device 15 is placed on the pedestal 30 and fixed by mounting bolts or the like, and the valve device 15 and each hydraulic equipment 35 in the pedestal 30. 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 front 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 the fixing bracket 21, whereby the valve device 15, A pipe assembly 32 including the hydraulic pipe 16, the pipe support portion 31, the pedestal 30, and the fixed bracket 21 is formed.

Next, in the transfer mounting step shown in FIG. 6, a wire 34 is connected to the piping assembly 32 formed in the piping assembly forming step, and the piping assembly 32 is connected to the revolving frame 4 through the wire 34. Transport. Then, the pipe assembly 32
When reaches the predetermined position, the wire 34 is extended downward, the pedestal 30 is housed in the pedestal housing portion 20, and the pipe support portion 31 is placed on each mounting portion 33.

Finally, the pedestal 30 is fixed to the pedestal accommodating portion 20 via the mounting bolts 36, 36, ...
After being fixed to each mounting portion 33 by welding, using fixing steps such as mounting bolts, the tip side of each hydraulic pipe 16 is connected to each supply / discharge port of each cylinder 12, 13, 14 via a hydraulic hose, Complete the hydraulic excavator piping connection work.

Thus, according to this embodiment, each mounting portion 33 is provided on the mounting plate 17 forming a part of the revolving frame 4.
Since the pedestal 30 is detachably attached to the pedestal accommodation portion 20 via the attachment bolts 36, the pipe support portion 31 can be attached to the swivel frame 4 via the respective attachment portions 33 and the like.

As a result, as shown in FIGS. 2 to 5, the hydraulic pipes 16, the valve device 15, etc. and the revolving frame 4 can be separated from each other, and each of them can be placed in the pedestal 30 in advance in a separate process. After mounting the hydraulic equipment 35 and the valve device 15 on the pedestal 30, the hydraulic devices 16 are mounted on the valving device 15 and the pipe support portion 31, so that the valve device 15, the hydraulic pipes 16, and the pedestal It is possible to accurately manufacture the pipe assembly 32 in which 30, the pipe support portion 31 and the like are integrated. Further, the pipe assembly 32 is conveyed to the revolving frame 4 via the wire 34, the pedestal 30 is accommodated in the pedestal accommodating portion 20, and the pipe support portion 31 is placed on each mounting portion 33. The pipe assembly 32 can be easily attached to the swivel frame 4, and the work efficiency, safety, reliability, etc. of the pipe connecting work can be greatly improved.

That is, each hydraulic pipe 16 which requires precision
The connection work between the valve device 15 and the valve device 15 and the like can be easily performed in another highly stable process, and the workability and reliability of the pipe connection work can be significantly improved.

When the pipe assembly 32 is attached to the swivel frame 4, the pedestal 30 may be housed in the pedestal housing portion 20, and the pipe support portion 31 may be placed on each mounting portion 33. Therefore, the mounting work can be easily performed with relatively rough positioning, and the work efficiency can be significantly improved.

Therefore, as described above, according to this embodiment,
By performing the connecting work of the hydraulic pipe 16 which requires high precision in another process with high stability, and the mounting work of the pipe assembly 32 which does not require so high precision on the revolving frame 4, that is, the quality of work. By dividing the process according to
The work efficiency, reliability, and safety of pipe connection work can be greatly improved.

In the above embodiment, the crawler type hydraulic excavator is exemplified as the construction machine, but 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 the mounting portion which is located on the working device side and to which the pipe support portion is mounted, and the pedestal is attached to and detached from the pedestal accommodating portion. Since it is configured so as to be possible, the valve device, the hydraulic pipe, the pedestal, the pipe support portion, and the like can be independent of the working machine main body, and the proximal end side of the hydraulic pipe can be connected to the valve device, After the tip end side is supported by the pipe support part, the pipe support part can be fixed to the working machine main body via the attachment part, and the pedestal can be housed in the cradle housing part together with the valve device.

As a result, the valve device, the hydraulic pipe, the pedestal, the pipe support part, etc. are mounted in advance in a separate process after the valve device is mounted on the pedestal, and then the hydraulic pipe is mounted on the valve device and the pipe support part. Can be accurately integrated, and the pedestal is housed in the cradle accommodating part, and the pipe support part is placed on each mounting part, so that these valve devices, hydraulic pipes, pedestals, and pipe support parts are installed. It can be easily attached to the work machine body, and the work efficiency, safety, reliability, etc. of the pipe connection work can be improved.

[Brief description of drawings]

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

FIG. 2 is a front view showing a pedestal before hydraulic equipment is incorporated.

FIG. 3 is a front view showing a state in which hydraulic equipment is incorporated in the cradle shown in FIG. 2 in the cradle inside connection step.

FIG. 4 is a front view showing a state in which the valve device is attached on the pedestal in FIG. 3 by the valve device attaching step.

5 is a front view schematically showing a state in which hydraulic pipes and the like are attached to the valve device in FIG. 4 in the pipe assembly forming step, with the hydraulic pipe on the front side being abbreviated.

FIG. 6 is a front view similar to FIG. 5, showing a state in which the pipe assembly in FIG. 5 is attached to the swivel frame by a transport attaching step.

FIG. 7 is a front view similar to FIG. 6, showing a completed state in which the pipe assembly is attached to the swivel frame.

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

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

FIG. 10 is a front view showing a state in which the pipe support portion and the like are fixed to the swivel frame in the step of attaching the pedestal and the pipe support portion.

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

FIG. 12 is an explanatory view schematically showing a state in which hydraulic pipes and the like are connected to the valve device in FIG. 11 in the pipe connecting step, with the hydraulic pipe on the front side being abbreviated.

[Explanation of symbols]

 3 Upper revolving structure (working machine main body) 8 Working device 15 Valve device 16 Hydraulic piping 20 Cradle receiving part 30 Cradle 31 Piping support part 32 Piping assembly 33 Mounting part 36 Mounting bolt

Claims (1)

[Claims] 1. A work machine main body, a work device provided on the front part of the work machine main body so that the work machine can be raised and lowered, a valve device for controlling pressure oil to the work device, and a base end side is the valve device. A hydraulic pipe that is connected and has a tip side connected to the working device, a pipe support portion that is provided on the front side of the work machine body and supports the tip side of the hydraulic pipe, and a pipe support portion that is provided below the valve device. A pedestal and a cradle accommodating portion provided in the working machine main body and to which the pedestal is attached, in the working machine main body, the pipe support portion located on the working device side is provided. A construction machine, wherein a mounting portion for mounting is provided, and the cradle is detachably provided in the cradle accommodating portion.