JP2002013157A - Valve device disposing structure of construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve problems such that a device disposing space of a revolving superstructure is so narrow to dispose valve devices and to connect pipes by the number of pilot lines and to solve inconvenience of pipe arrangement and layout in a production process, deterioration in the maintenance, and restriction to the development along the requirement of miniaturization of the revolving superstructure. SOLUTION: This valve device disposing structure is provided with a first bracket fixed to a machine body, a second bracket fixed to the first bracket, a pilot type control valve block mounted on the first bracket, and a plurality of valve devices fitted to the second bracket. The plurality of valve devices has ports connected to pilot ports of the pilot type control valve block.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for arranging hydraulic equipment for a construction machine such as a hydraulic shovel or a crane, and more particularly to a structure for arranging valves.

[0002]

2. Description of the Related Art In construction machines such as hydraulic excavators, usually,
Two variable displacement hydraulic pumps are driven by one diesel engine, and the hydraulic oil discharged from each hydraulic pump is introduced into a pilot control valve block as a multiple hydraulic switching valve, and the hydraulic oil is operated according to lever operation. The flow rate and the direction of the flow are controlled, and actuators such as a hydraulic motor and a hydraulic cylinder are controlled.

[0003] The pilot type control valve block is a unitized control valve for controlling each of a boom cylinder, an arm cylinder, a bucket cylinder, a swing motor, and right and left running motors. The spool is switched by the pilot pressure supplied to the pilot port of the control valve, and controls the flow rate of hydraulic oil supplied to each hydraulic actuator or discharged from each actuator according to the switching operation amount. I have. Thereby, for example, when performing a boom raising operation,
The movement of the boom operation lever is transmitted to the boom cylinder control valve, and hydraulic oil flows into the head side of the boom cylinder to raise the boom.

[0004] The pilot-type control valve block having such a configuration is mounted via a support bracket on a revolving frame serving as a base of an upper revolving unit of a hydraulic shovel, and is provided near the pilot-type control valve block. Is provided with a solenoid valve for supplying pilot pressure. The solenoid valve performs additional control on the control valve, for example, cutting a pilot line. Similarly, a shuttle valve for controlling the flow direction of hydraulic oil in the pilot line is disposed near the pilot control valve block.

[0005]

In recent years, for construction machines such as hydraulic excavators, it has become necessary to perform complicated control. In particular, a pilot line connected to a pilot-type control valve block is particularly suitable for various applications. A valve device is provided. However, in the case of a hydraulic shovel, there is a tendency to make the upper revolving unit compact, and there is a so-called in-vehicle revolving shovel capable of fully revolving within the vehicle width, or a rear revolving type excavator capable of revolving only within the vehicle width. A turning-type excavator within the end width of the vehicle is becoming mainstream, and a space for arranging the devices on the upper-part turning body is very small. Valves are arranged in this narrow place, and the pipes are connected by the number of pilot lines, so that the pipes are routed and routed in the production process, the maintenance is deteriorated, and the need for downsizing of the upper revolving unit is met. In many cases, it was inconvenient due to restrictions on development.

[0006]

According to the first aspect of the present invention, the first bracket fixed to the body, the second bracket fixed to the first bracket, and the first bracket mounted on the first bracket. A pilot-type control valve block, and a plurality of valve devices attached to the second bracket, wherein the plurality of valve devices have a port connected to a pilot port of the pilot-type control valve block by an oil path. are doing.

According to this, the pilot-type control valve block is disposed on the first bracket, the second bracket is fixed on the first bracket, and a plurality of valve devices are mounted on the second bracket. The control valve block and the plurality of valve devices can be subassembled by the first and second brackets and mounted on the revolving frame, so that efficiency can be improved in the production process, and a valve device is separately mounted from the revolving frame. There is no need to set up brackets, and multiple valve devices can be arranged in the vicinity of the pilot-type control valve block. Therefore, the piping length is shortened, and the layout of valves is made compact by improving the freedom of layout. Can be achieved.

Further, according to the second aspect of the present invention,
The second bracket extends from below the pilot-type control valve block to near the upper part of the pilot-type control valve block through a side of the pilot-type control valve block where no port exists, and the plurality of valve devices are provided. Is disposed near the upper part of the pilot control valve block, so that the second bracket can be disposed without affecting the piping to the pilot control valve block. Since the second bracket may be a plate-like member, it can be arranged in a narrow place where it is difficult to arrange the piping and the port of the valve.

Further, according to the third aspect of the present invention,
Since the second bracket is integrally formed by bending the end of the first bracket upward, the number of parts can be reduced.

Further, according to the invention described in claim 4,
The second bracket arranges the plurality of valve devices so as to surround an outer periphery of the pilot control valve block in a plan view. They can be arranged near ports, and the length of piping connecting them can be shortened.

Further, according to the invention described in claim 5,
Since the second bracket arranges the plurality of valve devices side by side in the up-down direction, even if the device arrangement space is extremely imminent in a plan view, the plurality of valve devices and piping can be provided with a margin. Can be arranged and arranged.

Further, according to the invention described in claim 6,
The second bracket arranges the plurality of valve devices so as to be overlapped in plan view above the pilot-type control valve block. Therefore, when the device arrangement space is extremely imminent in plan view. However, a plurality of valve devices can be effectively arranged near the pilot port of the pilot control valve block, and the length of the pipe connecting these can be reduced.

Furthermore, according to the invention of claim 7,
The second bracket has a main bracket member and an additional bracket member, and the additional bracket member is attached to the main bracket member as necessary. The same operation as the above-described operation can be obtained by appropriately attaching and detaching an additional bracket or additionally attaching the additional bracket.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a side view showing a hydraulic excavator as a construction machine to which the present invention is applied, and in particular, a small-sized excavator turning inside a rear end vehicle width. In the figure, 1 is a hydraulic excavator, 2 is a lower traveling body, 3 is an upper revolving superstructure, 4 is a work attachment, 5 is a boom that forms a work attachment, 6 is an arm that forms a work attachment, 7
Denotes a bucket constituting a work attachment, 8 denotes an operation lever, 9 denotes a traveling lever, 10 denotes a boom cylinder, 11 denotes an arm cylinder, and 12 denotes a bucket cylinder. FIG.
Is the upper swing body (swing frame) of the hydraulic excavator in FIG.
It is a figure showing an example of the above equipment arrangement. In the figure, 19
Is a turning frame, 20 is an engine, 21 is a hydraulic pump,
22 is a hydraulic oil tank, 23 is a fuel tank, 24 is a radiator, 25 is a hydraulic switching valve group including a pilot control valve block.

In such a hydraulic excavator 1, a hydraulic pump 21 is driven by rotation of an engine 20, and the hydraulic pump 21 pumps hydraulic oil from a hydraulic oil tank 22 to control each control valve constituting a pilot type control valve block. Pressure oil is supplied to the boom cylinder 10, the arm cylinder 11, the bucket cylinder 12, a turning motor (not shown) for turning, and a traveling motor for traveling via the hydraulic cylinder, thereby performing various operations of the hydraulic shovel. The operation lever 8 is directly connected to a hydraulic remote control valve (not shown). By operating the operation lever 8, pressure oil from a pilot pump (not shown) acts on a pilot port of each control valve to switch the control valve.

FIG. 3 is a plan view of a hydraulic switching valve group 25 according to the first embodiment of the present invention. In the figure, 30 is a pilot control valve block, 31 is a first bracket, 3
2 is a second bracket, 32a is a main bracket member, 32
b is an additional bracket member, 33 is a solenoid valve, and 34 is a shuttle valve. FIG. 4 is a side view in the direction A of FIG. In the figure, reference numeral 35 denotes a leg for fixing the first bracket 31 to the turning frame 19. FIG. 5 is a side view in the B direction of FIG.

The structure of the valve arranging device according to the first embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the second bracket 32 is fixed to the first bracket 31. In this case, in this embodiment, the first bracket 31 and the second bracket 32 are formed as separate members and then fixed by welding or bolts to be integrated, but by bending the end of the first bracket 31 upward. If the second bracket 32 is configured, the number of parts can be reduced. The second bracket 32 is formed by fixing an additional bracket member 32b to a main bracket member 32a.

The pilot type control valve block 30 is mounted and fixed on the first bracket, a solenoid valve 33 is mounted on the second bracket 32, and a shuttle valve 34 is mounted on the second bracket 32 near the tip of the additional bracket member 32b. As the additional bracket member 32b, an L-shaped angle plate is used in plan view, so that a separate bracket is erected from the revolving frame 19 while the shuttle valve 34 is separated from the solenoid valve 33 to some extent. It is arranged near the pilot-type control valve block 30 without any trouble.

The shape of the second bracket 32 depends on the use of the solenoid valve 33 and the shuttle valve 34 attached to the second bracket 32, etc. What is necessary is just to set so that it may be easy and the pipe length may be short. (The piping is not shown in the drawing.) Further, a plurality of additional bracket members 32b of the second bracket 32 may be attached as needed. The pilot control valve block 30, the solenoid valve 33, the shuttle valve 34, etc., and the pipes connecting them may be connected in advance, and then mounted and fixed on the revolving frame. Can be obtained. In addition, since the pipe length is short and can be routed neatly, the maintainability is good. In addition,
The second bracket 32 is connected to a piping port (not shown) of the pilot control valve block 30 from the first bracket 31.
Is set up so that it rises from the surface where it does not exist, so it does not interfere with the piping. This surface is usually close to other devices or the strength member of the revolving frame 19 in many cases. However, the second bracket 32 may be disposed in a narrow place by forming it in a plate shape with a plate member or the like. Is easy.

FIG. 6 is a side view showing a second embodiment of the present invention. In the figure, 34 'is a shuttle valve, 40 is a second bracket, 40a is a main bracket member, 40b, 4
0c is an additional bracket member. In the present embodiment, the first
In this embodiment, a shuttle valve 34 'is additionally provided above the solenoid valve 33. In this case, the second bracket 40 is provided with an additional bracket member 40c so as to extend further upward from the main bracket member 40a, and a shuttle valve 34 'is attached near the upper end of the additional bracket member 40c. Additional bracket member 4
0c may be formed integrally with the main bracket member 40a or the additional bracket member 40b, or may be formed separately, and later formed on the main bracket member 40a or the additional bracket member 4.
0b may be fixed. If they are formed integrally, the number of parts can be reduced. If they are formed separately, they may be attached as needed.

According to the present embodiment, even if there is little space for arranging the equipment in a plane or if the arranging of the equipment greatly deteriorates the maintainability, the upper space is effectively used to make the valves necessary for various controls. The device can be arranged.

FIG. 7 is a side view showing a third embodiment of the present invention. In the figure, reference numeral 50 denotes a second bracket.
According to the present embodiment, the solenoid valve 33 and the shuttle valve 3
4 and the like can be arranged above the pilot control valve block 30, so that they can be easily arranged even in a narrow place,
Furthermore, since each port of the pilot control valve block 30 can be brought close to a valve device (solenoid valve 33, shuttle valve 34, etc.) connected to the oil passage, the piping length of the piping connecting these can be reduced. As well as being able to arrange the pipes, it is possible to arrange them neatly.

[0023]

According to the first aspect of the present invention, the pilot-type control valve block is disposed on the first bracket, the second bracket is fixed on the first bracket, and a plurality of valve devices are further mounted on the second bracket. The pilot-type control valve block and the plurality of valve devices are connected to the first and second valves.
It can be subassembled by a bracket and mounted on a turning frame, which can improve efficiency in the production process.In addition, there is no need to stand a bracket for separately attaching a valve device from the turning frame, and a pilot type Since a plurality of valve devices can be arranged in the vicinity of the control valve block, it is possible to shorten the pipe length and to make the valve arrangement layout compact by improving the degree of freedom of the layout.

Furthermore, according to the second aspect of the present invention,
The second bracket extends from below the pilot-type control valve block to near the upper part of the pilot-type control valve block through a side of the pilot-type control valve block where no port exists, and the plurality of valve devices are provided. Is disposed near the upper part of the pilot control valve block, so that the second bracket can be disposed without affecting the piping to the pilot control valve block. Since the second bracket may be a plate-like member, it can be arranged in a narrow place where it is difficult to arrange the piping and the port of the valve.

Further, according to the third aspect of the present invention,
Since the second bracket is integrally formed by bending the end of the first bracket upward, the number of parts can be reduced.

Furthermore, according to the fourth aspect of the present invention,
The second bracket arranges the plurality of valve devices so as to surround an outer periphery of the pilot control valve block in a plan view. They can be arranged near ports, and the length of piping connecting them can be shortened.

Further, according to the fifth aspect of the present invention,
Since the second bracket arranges the plurality of valve devices side by side in the up-down direction, even if the device arrangement space is extremely imminent in a plan view, the plurality of valve devices and piping can be provided with a margin. Can be arranged and arranged.

Further, according to the invention described in claim 6,
The second bracket arranges the plurality of valve devices so as to be overlapped in plan view above the pilot-type control valve block. Therefore, when the device arrangement space is extremely imminent in plan view. However, a plurality of valve devices can be effectively arranged near the pilot port of the pilot control valve block, and the length of the pipe connecting these can be reduced.

Furthermore, according to the seventh aspect of the present invention,
The second bracket has a main bracket member and an additional bracket member, and the additional bracket member is attached to the main bracket member as necessary. The same operation as the above-described operation can be obtained by appropriately attaching and detaching an additional bracket or additionally attaching the additional bracket.

As described above, according to the present invention, valve devices for various controls can be arranged near the pilot control valve block, and these arrangements can be made compact. Further, the length of the piping connecting the pilot control valve block and the valve device can be kept short, and a proper arrangement can be made, so that maintenance can be improved. Further, the production efficiency can be improved by subassembly and assembly of these components.

[Brief description of the drawings]

FIG. 1 is a side view of a hydraulic shovel to which the present invention is applied.

FIG. 2 is a plan view showing a layout on an upper frame of the excavator of FIG. 1;

FIG. 3 is a plan view of a hydraulic switching valve group according to the first embodiment of the present invention.

FIG. 4 is a side view as seen from a direction A in FIG. 3;

FIG. 5 is a side view as viewed from a direction B in FIG. 3;

FIG. 6 is a side view showing a second embodiment of the present invention, which corresponds to a direction A in the first embodiment.

FIG. 7 is a side view showing a third embodiment of the present invention, and corresponds to a direction B in the first embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hydraulic excavator 2 Undercarriage 3 Upper revolving superstructure 4 Work attachment 19 Revolving frame 20 Engine 21 Hydraulic pump 25 Hydraulic switching valve group 30 Pilot type control valve block 31 First bracket 32, 40, 50 Second bracket 32a, 40a Main bracket Member 32b, 40b, 40c Additional bracket member 33 Solenoid valve 34, 34 'Shuttle valve

Claims (7)

[Claims] 1. A first bracket fixed to an airframe, a second bracket fixed to the first bracket, a pilot control valve block mounted on the first bracket, and attached to the second bracket. And a plurality of valve devices provided, wherein the plurality of valve devices have a port connected to a pilot port of the pilot-type control valve block by an oil passage. 2. The second bracket extends from below the pilot-type control valve block to near the upper part of the pilot-type control valve block through a side of the pilot-type control valve block where no port exists, and The valve device arrangement structure for a construction machine according to claim 1, wherein the plurality of valve devices are disposed near an upper portion of the pilot control valve block. 3. The valve device arrangement structure for a construction machine according to claim 1, wherein the second bracket is formed integrally by bending an end of the first bracket upward. 4. The second bracket according to claim 1, wherein the plurality of valve devices are arranged so as to surround an outer periphery of the pilot control valve block in a plan view. A valve device arrangement structure for a construction machine according to claim 1. 5. The valve arrangement structure for a construction machine according to claim 1, wherein the second bracket arranges the plurality of valve units in a vertical direction. . 6. The second bracket according to claim 1, wherein the plurality of valve devices are arranged above the pilot control valve block so as to overlap in plan view. A valve device arrangement structure for a construction machine according to claim 1. 7. The apparatus according to claim 1, wherein the second bracket has a main bracket member and an additional bracket member, and the additional bracket member is attached to the main bracket member as needed. The valve device arrangement structure for a construction machine according to any one of claims 1 to 6.